CN2892320Y

CN2892320Y - Hydraulic electric liquid hammer

Info

Publication number: CN2892320Y
Application number: CN 200620008003
Authority: CN
Inventors: 夏德仕; 李为民
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-03-14
Filing date: 2006-03-14
Publication date: 2007-04-25
Anticipated expiration: 2016-03-14

Abstract

The utility model discloses an electric-hydraulic hammer, which includes a seat, a hammer lever driving oil cylinder fixed on the seat, a hydraulic pressure source and a hammer lever. Upper part of the hammer lever is connected with the piston inside the hammer lever driving oil cylinder. The piston is provided with an upper chamber on the top and a lower chamber under the bottom, and the upper chamber is controlled by the handling valve whether to be communicated with the oil inlet pipe or with the oil outlet pipe. The handling valve includes a valve body, a servo valve and a valve core slidingly arranged in the servo valve. When the valve core is at one end of the servo valve, the handling valve opens the oil inlet pipe of the upper chamber and closes the oil outlet pipe. When the valve core is at the other end of the servo valve, the handling valve closes the oil inlet pipe of the upper chamber and opens the oil outlet pipe. When the valve core is in the middle of the servo valve, the handling valve closes the oil inlet pipe of the upper chamber and opens the oil outlet pipe. The reasonable design enables the utility model to realize hammer stop at any position and slight and rapid hammering, and can better fulfill requirements of hammering process.

Description

Hydraulic electrohydraulic hammer

Technical field

The utility model relate to a kind of be used to forge with piling machinery and other utilize the hydraulic electrohydraulic hammer of hydraulic-driven mass work done.

Background technology

The electric liquid hammer of existing full hydraulic drive, such as application number is that 93120993.5 patents and application number are the technical scheme of 02218450.3 patent disclosure, the technical scheme principle of the two is basic identical, it all is hammer stem piston cavity of resorption normal open hydraulic oil, realize the strike and the backhaul of forging hammer by the turnover of the oil of control valve control hammer stem piston upper chamber, just the structure and the principle of control valve are different.What application number was that 93120993.5 patents use is the direct driven plunger of hydraulic pressure, drives cone valve with piston rod and realizes hitting and backhaul, and action is to open one the tunnel in addition to mould, is realized by the reversal valve that necessarily stimulates the menstrual flow.The everything of forging hammer needs two cover control systems, and is comparatively complicated, can not accomplish stepless speed regulation.Application number is 02218450.3 patent, system is simple relatively, but can not realize going up down and slowly slowly action, can not realize the optional position stop the hammer, hammer stem can only be stabilized in top dead-centre or bottom dead centre, more than two patents all can not realize stepless speed regulation, so opening speed is uncontrollable, the former capital be difficult to realize that touching soon of forging hammer beat.

The utility model content

The purpose of this utility model is to provide a kind of forging hammer speed-controllable, can realize that forging hammer touches soon to beat, and can satisfy the hydraulic electrohydraulic hammer of forging hammer technological requirement better.

For achieving the above object, the utility model hydraulic electrohydraulic hammer, comprise support, be fixed with hammer stem in the support and drive oil cylinder, the hammer stem of hydraulic power source and lower end band tup, the piston that the upper end of hammer stem and hammer stem drive in the cylinder block links to each other, on the piston, following two ends have upper cylinder half chamber and following cylinder chamber, piston is playing the indoor effective work area of cylinder in the indoor effective work area of upper cylinder half greater than it, following cylinder chamber communicates with high-pressure oil passage, high-pressure oil passage communicates with hydraulic power source, described upper cylinder half chamber communicated with oil inlet passage respectively by the control of control valve or oil drain passage communicates, control valve comprises valve body, be provided with servo valve in the valve body, be provided with spool in the servo valve slidably, one end of spool links to each other with the spool control lever, when spool is positioned at an end of servo valve, control valve connects the oil inlet passage of upper cylinder half chamber and cuts out oil drain passage simultaneously, when spool is positioned at the other end of servo valve, control valve cuts out the oil inlet passage of upper cylinder half chamber and connects oil drain passage simultaneously, when spool was positioned at the middle part zero-bit of servo valve, control valve cut out the oil inlet passage and the oil drain passage of upper cylinder half chamber simultaneously.

The utility model hydraulic electrohydraulic hammer, the top that wherein said hammer stem drives cylinder block is provided with the execution servo valve, carry out servo valve and comprise the valve seat that is fixed on the hammer stem driving cylinder block, the inner chamber of valve seat communicates with described upper cylinder half chamber, can slide up and down to be provided with the servo-actuated valve pocket in the valve seat, the bottom of described spool links to each other with the top of servo-actuated valve pocket, when spool is positioned at an end of servo valve, the oil inlet passage that control valve is connected the upper cylinder half chamber by the servo valve cover is closed oil drain passage simultaneously, when spool is positioned at the other end of servo valve, the oil inlet passage that control valve cuts out the upper cylinder half chamber by the servo-actuated valve pocket is connected oil drain passage simultaneously, when spool was positioned at the middle part of servo valve, control valve cut out the oil inlet passage and the oil drain passage of upper cylinder half chamber simultaneously by the servo-actuated valve pocket.

The utility model hydraulic electrohydraulic hammer, wherein said valve body plug-in mounting is fixed on the top of described support and described hammer stem driving cylinder block, be divided into down actuator chamber by the annular shoulder of servo valve lateral wall successively from bottom to top between the madial wall of described servo valve lateral wall and described valve body, high-voltage oil cavity, carry out the chamber, oil back chamber and last actuator chamber, the upper end that is positioned at servo valve in the described valve body is provided with low-pressure cavity, the lower end that is positioned at servo valve in the valve body is provided with down low-pressure cavity, described oil back chamber communicates with described fuel tank by the oil pipe line of the oil drain passage of described upper cylinder half chamber, last low-pressure cavity and following low-pressure cavity communicate with described fuel tank by pipeline, described high-voltage oil cavity communicates with described high-pressure oil passage by at least one the fast fuel feed hole on the oil inlet passage of described upper cylinder half chamber, described execution chamber can communicate with high-voltage oil cavity or described oil back chamber, carrying out the chamber communicates with described upper cylinder half chamber by at least one oil-through hole, be divided into inner high voltage oil-feed cavity of resorption by the annular shoulder of spool lateral wall successively from bottom to top between the madial wall of described servo valve and the lateral wall of described spool, inner high voltage oil pocket and inner high voltage oil-feed epicoele, inner high voltage oil-feed cavity of resorption communicates with following actuator chamber by oilhole, described high-voltage oil cavity communicates with the inner high voltage oil pocket by oilhole, the described actuator chamber of going up communicates with described inner high voltage oil-feed epicoele by oilhole, described inner high voltage oil-feed cavity of resorption can communicate with described low-pressure cavity down or described inner high voltage oil pocket, and inner high voltage oil-feed epicoele can or be gone up low-pressure cavity with the inner high voltage oil pocket and communicate.

The utility model hydraulic electrohydraulic hammer, wherein the valve seat madial wall place that matches with described servo-actuated valve pocket is provided with oil-discharging cavity and high-voltage oil cavity from top to bottom successively, high-voltage oil cavity communicates with described high-pressure oil passage by the fast fuel feed hole on the oil inlet passage of described upper cylinder half chamber, described oil-discharging cavity communicates with described fuel tank by the oil pipe line of the oil drain passage of described upper cylinder half chamber, the top of described servo-actuated sleeve side wall is provided with at least one outage that can be communicated with oil-discharging cavity and valve seat cavity of resorption, the top of servo-actuated valve pocket is provided with at least one oil guiding hole that can be communicated with shoe cream room and valve seat cavity of resorption, the cavity of resorption of valve seat communicates with described upper cylinder half chamber, described valve body is positioned at the top of valve seat, the bottom of described servo valve links to each other with the top of described servo-actuated valve pocket, be provided with pressure-releasing cavity between the lateral wall of servo valve and the madial wall of described valve body from bottom to top successively, following actuator chamber, oil back chamber, last actuator chamber and outer high pressure oil suction chamber, the upper end that is positioned at servo valve in the described valve body is provided with low-pressure cavity, the lower end that is positioned at servo valve in the valve body is provided with down low-pressure cavity, last low-pressure cavity, following low-pressure cavity and pressure-releasing cavity communicate with described fuel tank by pipeline, described high pressure oil suction chamber communicates with described hydraulic power source by oil-in, be divided into inner high voltage oil-feed cavity of resorption by the annular shoulder of spool lateral wall successively from bottom to top between the madial wall of described servo valve and the lateral wall of described spool, interior low-pressure cavity and inner high voltage oil-feed epicoele, inner high voltage oil-feed cavity of resorption can communicate with following actuator chamber by oilhole, inner high voltage oil-feed cavity of resorption communicates by the connecting hole that passes described spool with inner high voltage oil-feed epicoele, described inner high voltage oil-feed epicoele can communicate with outer high pressure oil suction chamber by the repairing hole, the described actuator chamber of going up can communicate with interior low-pressure cavity or described inner high voltage oil-feed epicoele by oilhole, described oil back chamber communicates with interior low-pressure cavity by oilhole, and described actuator chamber down can communicate with interior low-pressure cavity or described inner high voltage oil-feed cavity of resorption by oilhole.

The utility model hydraulic electrohydraulic hammer, wherein the valve seat madial wall place that matches with described servo-actuated valve pocket is provided with oil-discharging cavity and high-voltage oil cavity from top to bottom successively, high-voltage oil cavity communicates with described high-pressure oil passage by at least one the fast fuel feed hole on the oil inlet passage of described upper cylinder half chamber, described oil-discharging cavity communicates with described fuel tank by the oil pipe line of the oil drain passage of described upper cylinder half chamber, the top of servo-actuated sleeve side wall is provided with at least one outage that can be communicated with shoe cream room and valve seat cavity of resorption, the cavity of resorption of valve seat communicates with described upper cylinder half chamber, described valve body is positioned at the top of valve seat, the bottom of described servo valve links to each other with the top of described servo-actuated valve pocket, be provided with middle pressure-releasing cavity between the lateral wall of servo valve and the madial wall of described valve body from bottom to top successively, actuator chamber and last high pressure oil suction chamber, the effective work area that acts on servo valve in the actuator chamber is greater than in the high-voltage oil cavity and act on effective work area sum of servo-actuated valve pocket in the valve seat cavity of resorption, the upper end that is positioned at servo valve in the described valve body is provided with pressure-releasing cavity, the lower end that is positioned at described spool in the servo valve is provided with down pressure-releasing cavity, last pressure-releasing cavity, following pressure-releasing cavity and middle pressure-releasing cavity communicate with described fuel tank by pipeline, the described high pressure oil suction chamber of going up communicates with described hydraulic power source, pressure-releasing cavity and inner high voltage epicoele in being divided into by the annular shoulder of spool lateral wall successively from bottom to top between the madial wall of described servo valve and the lateral wall of described spool, interior pressure-releasing cavity can communicate with described middle pressure-releasing cavity or described actuator chamber by oilhole, and described inner high voltage epicoele can communicate with described upward high pressure oil suction chamber or actuator chamber by oilhole.

The utility model hydraulic electrohydraulic hammer, wherein the top of the valve seat sidewall that matches with described servo-actuated valve pocket is provided with and unloads oilhole, unloading the oil pipe line of oilhole by described oil drain passage communicates with fuel tank, bottom in the described valve seat communicates with the top of described upper cylinder half chamber, the valve seat side-walls that matches with the servo-actuated valve pocket is provided with control chamber from top to bottom successively, normal low-pressure cavity and high-voltage oil cavity, servo valve is enclosed within the interior effective work area of control chamber greater than its effective work area in high-voltage oil cavity, normal low-pressure cavity communicates with fuel tank by pipeline, described high-voltage oil cavity communicates with described high-pressure oil passage by at least one the fast fuel feed hole on the oil inlet passage of described upper cylinder half chamber, control chamber communicates with the working hole of control valve by pipeline, between the lateral wall of described servo valve and the madial wall of described valve body from the preceding front wheel driving chamber that then is provided with successively, outer low-pressure cavity, outer working chamber, outer high pressure chest and rear drive chamber, the effective work area of servo valve in the front wheel driving chamber is greater than its effective work area in the rear drive chamber, the front end that is positioned at servo valve in the described valve body is provided with preceding low-pressure cavity, the rear end that is positioned at servo valve in the valve body is provided with the back low-pressure cavity, preceding low-pressure cavity, back low-pressure cavity and described outer low-pressure cavity communicate with described fuel tank by pipeline, described outer high pressure chest communicates with described high-pressure oil passage by pipeline, between the madial wall of described servo valve and the lateral wall of described spool from preceding then be divided into by the annular shoulder of spool lateral wall successively before the inner high voltage chamber, interior low pressure oil pocket, interior working chamber and inner high voltage chamber, back, preceding inner high voltage chamber communicates by the connecting hole that passes described spool with inner high voltage chamber, back, interior low pressure oil pocket communicates with outer low-pressure cavity by oilhole, interior working chamber communicates with outer working chamber by oilhole, described working hole communicates with outer working chamber, inner high voltage chamber, described back communicates with described outer high pressure chest and described rear drive chamber by oilhole respectively, described front wheel driving chamber can communicate with described preceding inner high voltage chamber or described interior low pressure oil pocket respectively by oilhole, described outer low-pressure cavity can communicate with described outer working chamber, and inner high voltage chamber, described back can communicate with described interior working chamber.

The utility model hydraulic electrohydraulic hammer, the indoor bottom of wherein said upper cylinder half has the pocketed oil chamber, the pocketed oil chamber is madial wall, the bottom of described valve body, the top of described piston and the axle journal institute area surrounded on piston top that is driven cylinder block by described hammer stem, the axle journal on piston top can match with the madial wall of valve body lower portion, described high-pressure oil passage is positioned at the support that drives the cylinder block sidewall around hammer stem, and the quantity of described lower through-hole and described fast fuel feed hole is 2-8.

The utility model hydraulic electrohydraulic hammer, wherein said hydraulic power source comprises hydraulic pump, the inlet of hydraulic pump communicates with described fuel tank by the pipeline that is in series with filter, the liquid outlet of hydraulic pump is in parallel with two-position two-way solenoid valve and hydraulic accumulator respectively by the pipeline that is in series with check valve, two-position two-way solenoid valve communicates with described high-pressure oil passage by pipeline, the control circuit of two-position two-way solenoid valve is electrically connected with travel switch or near switch and hydraulic pump, travel switch or match with described hammer stem near the touch device of switch, the pipeline place of hydraulic pump liquid outlet is parallel with unloader, and the liquid outlet of unloader communicates with described fuel tank by pipeline.

The utility model hydraulic electrohydraulic hammer, two ends of wherein said servo-actuated valve pocket have the stagnant oil pocket of buffering of annular respectively, and the stagnant oil pocket of buffering is lateral wall and the described valve base cavity institute area surrounded by described servo-actuated valve pocket two ends.

The utility model hydraulic electrohydraulic hammer, wherein said low-pressure cavity down communicates by the centre bore that passes described spool with last low-pressure cavity, and last low-pressure cavity or following low-pressure cavity communicate with described fuel tank by pipeline, and the quantity of described oil-through hole is 2-8.

The utility model hydraulic electrohydraulic hammer, the quantity of wherein said outage and described oil guiding hole are 2-8.

The utility model hydraulic electrohydraulic hammer, the oil inlet passage of its upper cylinder half chamber and oil drain passage divide other to communicate with control valve, control valve comprises valve body, be provided with servo valve in the valve body, be provided with spool in the servo valve slidably, one end of spool links to each other with the spool control lever, when spool stands on an end of servo valve, control valve connects the oil inlet passage of upper cylinder half chamber and cuts out oil drain passage simultaneously, when spool is positioned at the other end of servo valve, control valve cuts out the oil inlet passage of upper cylinder half chamber and connects oil drain passage simultaneously, and when spool was positioned at the zero-bit at middle part of servo valve, control valve cut out the oil inlet passage and the oil drain passage of upper cylinder half chamber simultaneously.Because reasonable in design, so no matter tup and hammer stem are in any motion state, as long as spool is moved on to zero-bit, the stop motion at once of tup and hammer stem is so this system can realize that the optional position stops hammer.Because the motion of hammer stem can stepless speed regulation, the hammer stem speed-controllable is beaten so can realize that forging hammer touches soon, can better meet the forging hammer technological requirement.

Below in conjunction with drawings and Examples in detail the utility model is described in detail.

Description of drawings

Fig. 1 is the structural representation of a kind of embodiment of the utility model hydraulic electrohydraulic hammer;

Fig. 2 is the structural representation of the another kind of embodiment of the utility model hydraulic electrohydraulic hammer;

Fig. 3 is the structural representation of another embodiment of the utility model hydraulic electrohydraulic hammer;

Fig. 4 is the structural representation of another embodiment of the utility model hydraulic electrohydraulic hammer;

Fig. 5 is the structural representation of another embodiment of the utility model hydraulic electrohydraulic hammer.

The specific embodiment

As depicted in figs. 1 and 2, the utility model hydraulic electrohydraulic hammer, the hammer stem that comprises support 39 and vertically be installed in the support 39 drives oil cylinder, the top that hammer stem drives cylinder block 12 is equipped with control valve, control valve shown in Fig. 1 and Fig. 2 is the state of spool 18 when being in zero-bit, the piston 11 that the upper end of the hammer stem 7 of lower end band tup 8 and hammer stem drive in the cylinder block 12 links to each other, on the piston 11, following two ends have upper cylinder half chamber 13 and following cylinder chamber 14, the effective work area of piston 11 in upper cylinder half chamber 13 is greater than its effective work area in following cylinder chamber 14, following cylinder chamber 14 links to each other with high-pressure oil passage 15 by at least one lower through-hole 22, the quantity of lower through-hole 22 can be 2 or 4 or 6 or 8, high-pressure oil passage 15 is communicated with hydraulic power source by two-position two-way solenoid valve 4, the oil inlet passage of upper cylinder half chamber 13 and oil drain passage communicate with control valve respectively, control valve comprises valve body 9, be provided with servo valve 17 in the valve body 9, be provided with spool 18 in the servo valve 17 slidably, the upper end of spool 18 links to each other with spool control lever 37, when spool 18 is positioned at the upper end of servo valve 17, control valve connects the oil inlet passage of upper cylinder half chamber 13 and cuts out oil drain passage simultaneously, when spool 18 is positioned at the lower end of servo valve 17, the oil inlet passage of control valve pass apolipsis cylinder chamber 13 is connected oil drain passage simultaneously, when spool 18 was positioned at the middle part zero-bit of servo valve 17, control valve cut out the oil inlet passage and the oil drain passage of upper cylinder half chamber 13 simultaneously.

Valve body 9 plug-in mountings are fixed on the top of support 39 and hammer stem driving cylinder block 12, be divided into down actuator chamber 27 by the annular shoulder of servo valve 17 lateral walls successively from bottom to top between the madial wall of servo valve 17 lateral walls and valve body 9, high-voltage oil cavity 19, carry out chamber 20, oil back chamber 21 and last actuator chamber 28, the upper end that is positioned at servo valve 17 in the valve body 9 is provided with low-pressure cavity 29, the lower end that is positioned at servo valve 17 in the valve body 9 is provided with down low-pressure cavity 30, oil back chamber 21 communicates with fuel tank 1 by the oil pipe line 68 of the oil drain passage of upper cylinder half chamber 13, following low-pressure cavity 30 communicates by the centre bore 31 that passes spool 18 with last low-pressure cavity 29, last low-pressure cavity 29 or following low-pressure cavity 30 communicate with fuel tank 1 by pipeline, or upward low-pressure cavity 29 directly communicates with fuel tank 1 respectively by pipeline with following low-pressure cavity 30, high-voltage oil cavity 19 communicates with high-pressure oil passage 15 by at least one the fast fuel feed hole 16 on 13 oil inlet passages of upper cylinder half chamber, the quantity of fast fuel feed hole 16 can be 2 or 4 or 6 or 8, carrying out chamber 20 can communicate with high-voltage oil cavity 19 or oil back chamber 21, carrying out chamber 20 communicates with upper cylinder half chamber 13 by at least one oil-through hole 23, the quantity of oil-through hole 23 can be 2 or 4 or 6 or 8, be divided into inner high voltage oil-feed cavity of resorption 32 by the annular shoulder of spool 18 lateral walls successively from bottom to top between the lateral wall of the madial wall of servo valve 17 and spool 18, inner high voltage oil pocket 25 and inner high voltage oil-feed epicoele 33, inner high voltage oil-feed cavity of resorption 32 communicates with following actuator chamber 27 by oilhole, high-voltage oil cavity 19 communicates with inner high voltage oil pocket 25 by oilhole, last actuator chamber 28 communicates with inner high voltage oil-feed epicoele 33 by oilhole, inner high voltage oil-feed cavity of resorption 32 can alternately communicate with following low-pressure cavity 30 or inner high voltage oil pocket 25, and inner high voltage oil-feed epicoele 33 can alternately communicate with inner high voltage oil pocket 25 or last low-pressure cavity 29.When the difference of Fig. 1 and Fig. 2 was that spool 18 is in the zero-bit state, the inner high voltage oil pocket 25 among Fig. 1 communicated with inner high voltage oil-feed epicoele 33 and inner high voltage oil-feed cavity of resorption 32 simultaneously; 25 whiles of inner high voltage oil pocket among Fig. 2 disconnect with inner high voltage oil-feed epicoele 33 and inner high voltage oil-feed cavity of resorption 32.

Bottom in the upper cylinder half chamber 13 has pocketed oil chamber 38, pocketed oil chamber 38 is madial wall, the bottom of valve body 9, the top of piston 11 and the axle journal institute area surrounded on piston 11 tops that driven cylinder block 12 by hammer stem, and the axle journal on piston 11 tops can match with the madial wall of valve body 9 bottoms.When the hammer stem quick return arrives top dead-centre, because hammer stem 7 is driving the tup 8 of big quality, so the inertia that rises is bigger, so the buffer unit on crashproof top must be set.The utility model adopts the principle in pocketed oil chamber 38, be about to kinetic energy be converted into pressure can mode reach the purpose of hammer stem 7 bufferings, concrete way is to form the axle journal with certain altitude in piston 11 upper ends, the diameter of axle journal is less than piston diameter, form ring-type pocketed oil chamber 38 with certain depth in valve body lower end, when the lower end that hammer stem 7 goes upward to the upper edge of axle journal of piston 11 and pocketed oil chamber 38 overlaps, can form a high pressure pocketed oil chamber 38 of sealing relatively, suddenly the hydraulic oil that raises in the pocketed oil chamber 38 can be extruded along the axle journal of piston 11 and the gap between the valve body 9, the energy that consumes hammer stem 7 and tup 8 slows down hammer stem 7 and tup 8, finally slowly stops to top dead-centre.

Above-mentioned hammer stem drives cylinder block 12 and is fixed in the support 39, and high-pressure oil passage 15 is positioned at the support 39 that drives cylinder block 12 sidewalls around hammer stem.

Above-mentioned hydraulic power source comprises hydraulic pump 2, the inlet of hydraulic pump 2 communicates with fuel tank 1 by the pipeline that is in series with filter, the liquid outlet of hydraulic pump 2 is in parallel with two-position two-way solenoid valve 4 and hydraulic accumulator 5 respectively by the pipeline that is in series with check valve, two-position two-way solenoid valve 4 communicates with high-pressure oil passage 15 by pipeline, the control circuit of two-position two-way solenoid valve 4 is electrically connected with travel switch or near switch 6 and hydraulic pump 2, travel switch or match with hammer stem 7 near the touch device of switch 6, the pipeline place of hydraulic pump 2 liquid outlets is parallel with unloader 3, and the liquid outlet of unloader 3 communicates with fuel tank 1 by pipeline.In use, primer fluid press pump 2, and adjust unloader 3, hydraulic oil will be delivered in the hydraulic accumulator 5 by the road, and simultaneously in two-position two-way solenoid valve 4 is delivered to high-pressure oil passage 15.Because to the forging hammer hammer stem is topmost stressed part, life-span is shorter relatively, in case hammer stem is from middle part fracture and when being in backhaul letter attitude, the hydraulic oil that high-pressure oil passage 15 and hydraulic power source provide will vomit from the end opening of high-pressure oil passage 15, might cause fire, cause immeasurable serious consequence.Bi-bit bi-pass reversal valve 4 of often opening so the utility model has been connected between high-pressure oil passage 15 and hydraulic accumulator 5, and near the outlet of high-pressure oil passage 15 lower ends installation travel switch or near switch 6.In case hammer stem ruptures from the middle part, travel switch or collect signal near the touch device of switch 6 and signal for immediately the bi-bit bi-pass reversal valve of often opening 4, the bi-bit bi-pass reversal valve of often opening 4 receive travel switch or near the signal of switch 6 after commutate immediately and close down hydraulic pump 2, cut off the path of hydraulic power source and high-pressure oil passage 15, make high-pressure oil passage 15 can not get oil, so hammer stem 7 can stop backhaul immediately, stop the generation of end opening fuel injection event, increased the security of equipment operation greatly.

When work, when touching, needs tup 8 beats soon or energetically fast during strike downwards, can utilize spool control lever 37 that spool 18 is upwards risen to the appropriate location or is promoted to the extreme higher position, at this moment, last actuator chamber 28 is connected by inner high voltage oil-feed epicoele 33 and last low-pressure cavity 29, inner high voltage oil-feed epicoele 33 disconnects with inner high voltage oil pocket 25, last low-pressure cavity 29 communicates with fuel tank 1 by pipeline again, thereby the pressure in the order in actuator chamber 28 and the inner high voltage oil-feed epicoele 33 reduces, at present actuator chamber 27 is connected by inner high voltage oil-feed cavity of resorption 32 and inner high voltage oil pocket 25 together, inner high voltage oil-feed cavity of resorption 32 disconnects with following low-pressure cavity 30, inner high voltage oil pocket 25 communicates with high-voltage oil cavity 19 by oilhole again, thereby the pressure under the order in the actuator chamber 27 is greater than last actuator chamber 28, so, servo valve 17 moves upward, make high-voltage oil cavity 19 and carry out chamber 20 connections, disconnect with oil back chamber 21 with carrying out chamber 20 season, hydraulic oil in the high-voltage oil cavity 19 will enter oil-through hole 23 through carrying out chamber 20, enter upper cylinder half chamber 13 by oil-through hole 23 again, because the effective work area of piston 11 in upper cylinder half chamber 13 is greater than its effective work area in following cylinder chamber 14, under the effect of hydraulic oil, piston 11 can move downward fast, is being with tup 8 to hit work done downwards by hammer stem 7.

When needs tup 8 moves upward or move upward fast, can utilize spool control lever 37 that spool 18 is reduced to the appropriate location downwards or is reduced to extreme lower position, at this moment, last actuator chamber 28 is connected by inner high voltage oil-feed epicoele 33 and inner high voltage oil pocket 25, inner high voltage oil-feed epicoele 33 disconnects with last low-pressure cavity 29, last low-pressure cavity 29 communicates with fuel tank 1 by pipeline, inner high voltage oil pocket 25 communicates with high-voltage oil cavity 19 by oilhole again, thereby actuator chamber 28 and inner high voltage oil-feed epicoele 33 are in high-pressure state in the order, at present actuator chamber 27 is connected by inner high voltage oil-feed cavity of resorption 32 and following low-pressure cavity 30 together, inner high voltage oil-feed cavity of resorption 32 disconnects with inner high voltage oil pocket 25, following low-pressure cavity 30 communicates with fuel tank 1 by pipeline, thereby the pressure under the order in the actuator chamber 27 is less than last actuator chamber 28, so, servo valve 17 moves downward, make high-voltage oil cavity 19 and carry out chamber 20 disconnections, connect with oil back chamber 21 with carrying out chamber 20 season, under the effect of following cylinder chamber 14 inner high voltage oil, piston 11 can move upward fast, be with tup 8 to move upward by hammer stem 7, the oil in the upper cylinder half chamber 13 then can be through oil-through hole 23, the oil pipe line of the oil drain passage of oil back chamber 21 and upper cylinder half chamber 13 enters fuel tank 1.

When 8 stop motions of needs tup, hydraulic electrohydraulic hammer as shown in Figure 1 can utilize spool control lever 37 that spool 18 is stopped appropriate location to middle zero-bit, at this moment, last actuator chamber 28 is connected by inner high voltage oil-feed epicoele 33 and inner high voltage oil pocket 25, inner high voltage oil-feed epicoele 33 disconnects with last low-pressure cavity 29, inner high voltage oil pocket 25 communicates with high-voltage oil cavity 19 by oilhole again, with actuator chamber 27 and following low-pressure cavity 30 disconnect at present, inner high voltage oil-feed cavity of resorption 32 is connected with inner high voltage oil pocket 25, following low-pressure cavity 30 communicates with fuel tank 1 by pipeline, thereby order actuator chamber 27 interior pressure down equals actuator chamber 28, so, servo valve 17 stop motions, and this moment, high-voltage oil cavity 19 disconnected with execution chamber 20, carry out chamber 20 simultaneously and disconnect piston 11 stop motion immediately with oil back chamber 21.

When 8 stop motions of needs tup, hydraulic electrohydraulic hammer as shown in Figure 2 can utilize spool control lever 37 that spool 18 is stopped appropriate location to middle zero-bit, at this moment, inner high voltage oil-feed epicoele 33 disconnects with last low-pressure cavity 29 and inner high voltage oil pocket 25 respectively, inner high voltage oil-feed cavity of resorption 32 disconnects with inner high voltage oil pocket 25 and following low-pressure cavity 30 respectively simultaneously, thereby order actuator chamber 27 interior pressure down equals actuator chamber 28, so, servo valve 17 stop motions, and this moment, high-voltage oil cavity 19 disconnected with execution chamber 20, carry out chamber 20 simultaneously and disconnect piston 11 stop motion immediately with oil back chamber 21.

As shown in Figure 3, the utility model hydraulic electrohydraulic hammer, the hammer stem that comprises support 39 and vertically be installed in the support 39 drives oil cylinder, the top that hammer stem drives cylinder block 12 is equipped with control valve, control valve shown in Fig. 3 is the state of spool 18 when being in zero-bit, the piston 11 that the upper end of the hammer stem 7 of lower end band tup 8 and hammer stem drive in the cylinder block 12 links to each other, on the piston 11, following two ends have upper cylinder half chamber 13 and following cylinder chamber 14, the effective work area of piston 11 in upper cylinder half chamber 13 is greater than its effective work area in following cylinder chamber 14, following cylinder chamber 14 links to each other with high-pressure oil passage 15 by at least one lower through-hole 22, the quantity of lower through-hole 22 can be 2 or 4 or 6 or 8, high-pressure oil passage 15 is communicated with hydraulic power source by two-position two-way solenoid valve 4, the oil inlet passage of upper cylinder half chamber 13 and oil drain passage communicate with control valve respectively, control valve comprises valve body 9, be provided with servo valve 17 in the valve body 9, be provided with spool 18 in the servo valve 17 slidably, the upper end of spool 18 links to each other with spool control lever 37, when spool 18 is positioned at the upper end of servo valve 17, control valve connects the oil inlet passage of upper cylinder half chamber 13 and cuts out oil drain passage simultaneously, when spool 18 is positioned at the lower end of servo valve 17, control valve cuts out the oil inlet passage of upper cylinder half chamber 13 and connects oil drain passage simultaneously, when spool 18 was positioned at the middle part zero-bit of servo valve 17, control valve cut out the oil inlet passage and the oil drain passage of upper cylinder half chamber 13 simultaneously.

The top that hammer stem drives cylinder block 12 is provided with the execution servo valve, carry out servo valve and comprise the valve seat 10 that is fixed on the hammer stem driving cylinder block 12, the inner chamber of valve seat 10 communicates with upper cylinder half chamber 13, can slide up and down to be provided with servo-actuated valve pocket 41 in the valve seat 10, the bottom of spool 18 links to each other with the top of servo-actuated valve pocket 41, when spool 18 is positioned at the upper end of servo valve 17, the oil inlet passage that control valve is connected upper cylinder half chamber 13 by servo-actuated valve pocket 41 is closed oil drain passage simultaneously, when spool 18 is positioned at the lower end of servo valve 17, the oil inlet passage that control valve cuts out upper cylinder half chamber 13 by servo-actuated valve pocket 41 is connected oil drain passage simultaneously, when spool 18 was positioned at the middle part of servo valve 17, control valve cut out the oil inlet passage and the oil drain passage of upper cylinder half chamber 13 simultaneously by servo-actuated valve pocket 41.

Two ends of servo-actuated valve pocket 41 have the stagnant oil pocket 77 of buffering of annular respectively, and the stagnant oil pocket 77 of buffering is lateral wall and the valve seat 10 inner chambers institute area surrounded by servo-actuated valve pocket 41 2 ends.The valve seat 10 madial wall places that match with servo-actuated valve pocket 41 are provided with oil-discharging cavity 42 and high-voltage oil cavity 19 from top to bottom successively, high-voltage oil cavity 19 communicates with high-pressure oil passage 15 by the fast fuel feed hole 16 on the oil inlet passage of upper cylinder half chamber 13, oil-discharging cavity 42 communicates with fuel tank 1 by the oil pipe line 68 of the oil drain passage of upper cylinder half chamber 13, the top of servo-actuated valve pocket 41 sidewalls is provided with at least one outage 45 that can be communicated with oil-discharging cavity 42 and valve seat 10 cavity of resorptions, the quantity of outage 45 can be 2 or 4 or 6 or 8, the top of servo-actuated valve pocket 41 is provided with at least one oil guiding hole 47 that can be communicated with shoe cream room 46 and valve seat 10 cavity of resorptions, the quantity of oil guiding hole 47 can be 2 or 4 or 6 or 8, the cavity of resorption of valve seat 10 communicates with upper cylinder half chamber 13, make hydraulic oil in the shoe cream room 46 can flow in valve seat 10 cavity of resorptions freely and in the upper cylinder half chamber 13, the top of valve seat 10 is provided with valve body 9, the bottom of servo valve 17 links to each other with the top of servo-actuated valve pocket 41, be provided with pressure-releasing cavity 40 between the madial wall of the lateral wall of servo valve 17 and valve body 9 from bottom to top successively, following actuator chamber 27, oil back chamber 21, last actuator chamber 28 and outer high pressure oil suction chamber 43, the upper end that is positioned at servo valve 17 in the valve body 9 is provided with low-pressure cavity 29, the lower end that is positioned at servo valve 17 in the valve body 9 is provided with down low-pressure cavity 30, last low-pressure cavity 29, following low-pressure cavity 30 and pressure-releasing cavity 40 communicate with fuel tank 1 by pipeline, high pressure oil suction chamber 43 communicates with hydraulic power source by oil-in 44, be divided into inner high voltage oil-feed cavity of resorption 32 by the annular shoulder of spool 18 lateral walls successively from bottom to top between the lateral wall of the madial wall of servo valve 17 and spool 18, interior low-pressure cavity 51 and inner high voltage oil-feed epicoele 33, inner high voltage oil-feed cavity of resorption 32 can communicate with following actuator chamber 27 by oilhole, inner high voltage oil-feed cavity of resorption 32 communicates by the connecting hole 48 that passes spool 18 with inner high voltage oil-feed epicoele 33, inner high voltage oil-feed epicoele 33 can communicate with outer high pressure oil suction chamber 43 by oilhole, last actuator chamber 28 can alternately communicate with interior low-pressure cavity 51 or inner high voltage oil-feed epicoele 33 by oilhole, oil back chamber 21 communicates with interior low-pressure cavity 51 by oilhole, and following actuator chamber 27 can alternately communicate with interior low-pressure cavity 51 or inner high voltage oil-feed cavity of resorption 32 by oilhole.

When work, when touching, needs tup 8 beats soon or energetically fast during strike downwards, can utilize spool control lever 37 that spool 18 is upwards risen to the appropriate location or is promoted to the extreme higher position, at this moment, inner high voltage oil-feed epicoele 33 communicates with outer high pressure oil suction chamber 43 by oilhole, inner high voltage oil-feed cavity of resorption 32 communicates with following actuator chamber 27 by oilhole, last actuator chamber 28 communicates with interior low-pressure cavity 51 by oilhole, make and go up in the actuator chamber 28 owing to after interior low-pressure cavity 51 releases, be in low-pressure state, be in high pressure conditions in the following actuator chamber 27, cause down pressure in the actuator chamber 27 to be higher than the interior pressure of actuator chamber 28, so, servo valve 17 moves upward, the servo valve 17 that moves upward can be with servo-actuated valve pocket 41 to move upward, make high-voltage oil cavity 19 communicate with upper cylinder half chamber 13 by the cavity of resorption of valve seat 10, hydraulic oil enters in the upper cylinder half chamber 13, the cavity of resorption of valve seat 10 and oil-discharging cavity 42 disconnect simultaneously, because the effective work area of piston 11 in upper cylinder half chamber 13 is greater than its effective work area in following cylinder chamber 14, under the effect of hydraulic oil, piston 11 can move downward fast, is being with tup 8 to hit work done downwards by hammer stem 7.

When needs tup 8 moves upward or move upward fast, can utilize spool control lever 37 that spool 18 is reduced to the appropriate location downwards or is reduced to extreme lower position, at this moment, inner high voltage oil-feed epicoele 33 communicates with last actuator chamber 28, inner high voltage oil-feed epicoele 33 communicates with outer high pressure oil suction chamber 43 by oilhole simultaneously, be in high pressure conditions in the actuator chamber 28 in the order, inner high voltage oil-feed cavity of resorption 32 then disconnects with following actuator chamber 27, following actuator chamber 27 communicates with interior low-pressure cavity 51 by oilhole, make and after interior low-pressure cavity 51 releases, be in low-pressure state in the actuator chamber 27 down, cause down the pressure in the actuator chamber 27 to be lower than the pressure of going up in the actuator chamber 28, so, servo valve 17 moves downward, the servo valve 17 that moves downward can be with servo-actuated valve pocket 41 to move downward, make the high-voltage oil cavity 19 and the cavity of resorption of valve seat 10 disconnect, the cavity of resorption of valve seat 10 communicates with outage 45 simultaneously, make the cavity of resorption of upper cylinder half chamber 13 through valve seat 10, outage 45, oil pipe line 68 releases of oil-discharging cavity 42 and oil drain passage, under the effect of following cylinder chamber 14 inner high voltage oil, piston 11 can move upward at a slow speed or fast, and piston 11 is being with tup 8 also to move upward by hammer stem 7.

When 8 stop motions of needs tup, can utilize spool control lever 37 that spool 18 is stopped appropriate location to middle zero-bit, at this moment,

last actuator chamber

28,27 whiles of following actuator chamber and interior low-pressure cavity 51 disconnect, inner high voltage oil-feed epicoele 33 disconnects with

last actuator chamber

28,32 of inner high voltage oil-feed cavity of resorptions and following actuator chamber 27 disconnect, thereby order actuator chamber 27 interior pressure down equals actuator chamber 28, so, servo valve 17 stop motions, and this moment, high-voltage oil cavity 19 disconnected with the cavity of resorption of valve seat 10, the cavity of resorption of valve seat 10 and oil-discharging cavity 42 disconnections simultaneously, piston 11 stop motion immediately.

Bottom in the upper cylinder half chamber 13 has pocketed oil chamber 38, pocketed oil chamber 38 is madial wall, the bottom of valve body 9, the top of piston 11 and the axle journal institute area surrounded on piston 11 tops that driven cylinder block 12 by hammer stem, and the axle journal on piston 11 tops can match with the madial wall of valve body 9 bottoms.When the hammer stem quick return arrives top dead-centre, because hammer stem 7 is driving the tup 8 of big quality, so the inertia that rises is bigger, so the buffer unit on crashproof top must be set.The utility model adopts the principle of pocketed oil chamber 38 and the stagnant oil pocket 77 of buffering, be about to kinetic energy be converted into pressure can mode reach the purpose of hammer stem 7 and servo-actuated valve pocket 41 bufferings, concrete way is the axle journal that processes certain altitude in piston 11 upper ends, the diameter of axle journal is less than piston diameter, form ring-type pocketed oil chamber 38 with certain depth in valve body lower end, when the lower end that hammer stem 7 goes upward to the upper edge of axle journal of piston 11 and pocketed oil chamber 38 overlaps, can form a high pressure pocketed oil chamber 38 of sealing relatively, suddenly the hydraulic oil that raises in the pocketed oil chamber 38 can be extruded along the axle journal of piston 11 and the gap between the valve seat 10, the energy that consumes hammer stem 7 and tup 8 slows down hammer stem 7 and tup 8, finally slowly stops to top dead-centre.For 41 of servo-actuated valve pockets is the stagnant oil pocket 77 of buffering that is respectively equipped with annular at its two end, when servo-actuated valve pocket 41 moves to a certain end, can form a stagnant oil pocket 77 of high-pressure buffer of sealing relatively, the stagnate hydraulic oil that raises suddenly in the oil pocket 77 of buffering can be extruded along the gap of 10 of servo-actuated valve pocket 41 and valve seats, and the energy of fire fighting truck consumption servo-actuated valve pocket 41 slows down servo-actuated valve pocket 41 and finally slowly stops.

Above-mentioned hydraulic power source comprises hydraulic pump 2, the inlet of hydraulic pump 2 communicates with fuel tank 1 by the pipeline that is in series with filter, the liquid outlet of hydraulic pump 2 is in parallel with two-position two-way solenoid valve 4 and hydraulic accumulator 5 respectively by the pipeline that is in series with check valve, two-position two-way solenoid valve 4 communicates with high-pressure oil passage 15 by pipeline, the control circuit of two-position two-way solenoid valve 4 is electrically connected with travel switch or near switch 6 and hydraulic pump 2, travel switch or match with hammer stem 7 near the touch device of switch 6, the pipeline place of hydraulic pump 2 liquid outlets is parallel with unloader 3, and the liquid outlet of unloader 3 communicates with fuel tank 1 by pipeline.In use, primer fluid press pump 2, and adjust unloader 3, hydraulic oil will be delivered in the hydraulic accumulator 5 by the road, and simultaneously in two-position two-way solenoid valve 4 is delivered to high-pressure oil passage 15.Because to the forging hammer hammer stem is topmost stressed part, life-span is shorter relatively, in case hammer stem is from middle part fracture and when being in the backhaul attitude, the hydraulic oil that high-pressure oil passage 15 and hydraulic power source provide will vomit from the end opening of high-pressure oil passage 15, might cause fire, cause immeasurable serious consequence.Bi-bit bi-pass reversal valve 4 of often opening so the utility model has been connected between high-pressure oil passage 15 and hydraulic accumulator 5, and near the outlet of high-pressure oil passage 15 lower ends installation travel switch or near switch 6.In case hammer stem ruptures from the middle part, travel switch or collect signal near the touch device of switch 6 and signal for immediately the bi-bit bi-pass reversal valve of often opening 4, the bi-bit bi-pass reversal valve of often opening 4 receive travel switch or near the signal of switch 6 after commutate immediately and close down hydraulic pump 2, cut off the path of hydraulic power source and high-pressure oil passage 15, make high-pressure oil passage 15 can not get oil, so hammer stem 7 can stop backhaul immediately, stop the generation of end opening fuel injection event, increased the security of equipment operation greatly.

As shown in Figure 4, the hammer stem that comprises support 39 and vertically be installed in the support 39 drives oil cylinder, the top that hammer stem drives cylinder block 12 is equipped with control valve, control valve shown in Fig. 4 is the state of spool 18 when being in zero-bit, the piston 11 that the upper end of the hammer stem 7 of lower end band tup 8 and hammer stem drive in the cylinder block 12 links to each other, on the piston 11, following two ends have upper cylinder half chamber 13 and following cylinder chamber 14, the effective work area of piston 11 in upper cylinder half chamber 13 is greater than its effective work area in following cylinder chamber 14, following cylinder chamber 14 links to each other with high-pressure oil passage 15 by at least one lower through-hole 22, the quantity of lower through-hole 22 can be 2 or 4 or 6 or 8, high-pressure oil passage 15 is communicated with hydraulic power source by two-position two-way solenoid valve 4, the oil inlet passage of upper cylinder half chamber 13 and oil drain passage communicate with control valve respectively, control valve comprises valve body 9, be provided with servo valve 17 in the valve body 9, be provided with spool 18 in the servo valve 17 slidably, the upper end of spool 18 links to each other with spool control lever 37, when spool 18 stands on the upper end of servo valve 17, control valve connects the oil inlet passage of upper cylinder half chamber 13 and cuts out oil drain passage simultaneously, when spool 18 is positioned at the lower end of servo valve 17, control valve cuts out the oil inlet passage of upper cylinder half chamber 13 and connects oil drain passage simultaneously, when spool 18 was positioned at the middle part zero-bit of servo valve 17, control valve cut out the oil inlet passage and the oil drain passage of upper cylinder half chamber 13 simultaneously.

Two ends of servo-actuated valve pocket 41 have the stagnant oil pocket 77 of buffering of annular respectively, and the stagnant oil pocket 77 of buffering is lateral wall and the valve seat 10 inner chambers institute area surrounded by servo-actuated valve pocket 41 2 ends.The valve seat 10 madial wall places that match with servo-actuated valve pocket 41 are provided with oil-discharging cavity 42 and high-voltage oil cavity 19 from top to bottom successively, high-voltage oil cavity 19 communicates with high-pressure oil passage 15 by at least one the fast fuel feed hole 16 on the oil inlet passage of upper cylinder half chamber 13, oil-discharging cavity 42 communicates with fuel tank 1 by the oil pipe line 68 of the oil drain passage of upper cylinder half chamber 13, the top of servo-actuated valve pocket 41 sidewalls is provided with at least one outage 45 that can be communicated with shoe cream room 46 and valve seat 10 cavity of resorptions, the cavity of resorption of valve seat 10 communicates with upper cylinder half chamber 13, make hydraulic oil in the shoe cream room 46 can flow in valve seat 10 cavity of resorptions freely and in the upper cylinder half chamber 13, the top of valve seat 10 is provided with valve body 9, the bottom of servo valve 17 links to each other with the top of servo-actuated valve pocket 41, pressure-releasing cavity 70 in being provided with successively from bottom to top between the madial wall of the lateral wall of servo valve 17 and valve body 9, actuator chamber 71 and last high pressure oil suction chamber 72, the effective work area that acts on servo valve 17 in the actuator chamber 71 is greater than in the high-voltage oil cavity 19 and act on effective work area sum of servo-actuated valve pocket 41 in valve seat 10 cavity of resorptions, the upper end that is positioned at servo valve 17 in the valve body 9 is provided with pressure-releasing cavity 73, the lower end that is positioned at spool 18 in the servo valve 17 is provided with down pressure-releasing cavity 74, last pressure-releasing cavity 73, following pressure-releasing cavity 74 and middle pressure-releasing cavity 70 communicate with fuel tank 1 by pipeline, last high pressure oil suction chamber 72 communicates with hydraulic power source, pressure-releasing cavity 75 and inner high voltage epicoele 76 in being divided into by the annular shoulder of spool 18 lateral walls successively from bottom to top between the lateral wall of the madial wall of servo valve 17 and spool 18, interior pressure-releasing cavity 75 can communicate with middle pressure-releasing cavity 70 or actuator chamber 71 by oilhole, and inner high voltage epicoele 76 can communicate with last high pressure oil suction chamber 72 or actuator chamber 71 by oilhole.

When work, when touching, needs tup 8 beats soon or energetically fast during strike downwards, can utilize spool control lever 37 that spool 18 is upwards risen to the appropriate location or is promoted to the extreme higher position, at this moment, actuator chamber 71 disconnects with inner high voltage epicoele 76, actuator chamber 71 is simultaneously by oilhole and interior pressure-releasing cavity 75, middle pressure-releasing cavity 70 and fuel tank 1 communicate, thereby cause actuator chamber 71 releases, so, servo valve 17 and servo-actuated valve pocket 41 will move upward under the effect of high-voltage oil cavity 19 inner high voltage oil, make high-voltage oil cavity 19 communicate with upper cylinder half chamber 13 by the cavity of resorption of valve seat 10, hydraulic oil enters in the upper cylinder half chamber 13, the cavity of resorption of valve seat 10 and oil-discharging cavity 42 disconnect simultaneously, because the effective work area of piston 11 in upper cylinder half chamber 13 is greater than its effective work area in following cylinder chamber 14, under the effect of hydraulic oil, piston 11 can move downward fast, is being with tup 8 to hit work done downwards by hammer stem 7.

When needs tup 8 moves upward or move upward fast, can utilize spool control lever 37 that spool 18 is reduced to the appropriate location downwards or is reduced to extreme lower position, at this moment, actuator chamber 71 communicates with inner high voltage epicoele 76 by oilhole, actuator chamber 71 disconnects with interior pressure-releasing cavity 75 simultaneously, inner high voltage epicoele 76 communicates with last high pressure oil suction chamber 72 by oilhole simultaneously, make in the actuator chamber 71 and be in high pressure conditions, because the effective work area that acts on servo valve 17 in the actuator chamber 71 is greater than in the high-voltage oil cavity 19 and act on effective work area sum of servo-actuated valve pocket 41 in valve seat 10 cavity of resorptions, so, servo valve 17 and servo-actuated valve pocket 41 move downward, make the high-voltage oil cavity 19 and the cavity of resorption of valve seat 10 disconnect, the cavity of resorption of valve seat 10 communicates with outage 45 simultaneously, make the cavity of resorption of upper cylinder half chamber 13 through valve seat 10, outage 45, oil pipe line 68 releases of oil-discharging cavity 42 and oil drain passage, under the effect of following cylinder chamber 14 inner high voltage oil, piston 11 can move upward at a slow speed or fast, and piston 11 is being with tup 8 electricity to move upward by hammer stem 7.

When 8 stop motions of needs tup, can utilize spool control lever 37 that spool 18 is stopped appropriate location to middle zero-bit, at this moment, actuator chamber 71 disconnects with inner high voltage epicoele 76 and interior pressure-releasing cavity 75 simultaneously, so, servo valve 17 stop motions, and this moment, high-voltage oil cavity 19 disconnected with the cavity of resorption of valve seat 10, the cavity of resorption of valve seat 10 and oil-discharging cavity 42 disconnect piston 11 stop motion immediately simultaneously.

Bottom in the upper cylinder half chamber 13 has pocketed oil chamber 38, pocketed oil chamber 38 is madial wall, the bottom of valve body 9, the top of piston 11 and the axle journal institute area surrounded on piston 11 tops that driven cylinder block 12 by hammer stem, and the axle journal on piston 11 tops can match with the madial wall of valve body 9 bottoms.When the hammer stem quick return arrives top dead-centre, because hammer stem 7 is driving the tup 8 of big quality, so the inertia that rises is bigger, so the buffer unit on crashproof top must be set.The utility model adopts the principle of pocketed oil chamber 38 and the stagnant oil pocket 77 of buffering, be about to kinetic energy be converted into pressure can mode reach the purpose of hammer stem 7 and servo-actuated valve pocket 41 bufferings, concrete way is to form the axle journal with certain altitude in piston 11 upper ends, the diameter of axle journal is less than piston diameter, process the ring-type pocketed oil chamber 38 of certain depth in valve body lower end, when the lower end that hammer stem 7 goes upward to the upper edge of axle journal of piston 11 and pocketed oil chamber 38 overlaps, can form a high pressure pocketed oil chamber 38 of sealing relatively, suddenly the hydraulic oil that raises in the pocketed oil chamber 38 can be extruded along the axle journal of piston 11 and the gap between the valve seat 10, the energy that consumes hammer stem 7 and tup 8 slows down hammer stem 7 and tup 8, finally slowly stops to top dead-centre.For 41 of servo-actuated valve pockets is the stagnant oil pocket 77 of buffering that is respectively equipped with annular at its two end, when servo-actuated valve pocket 41 moves to a certain end, can form a stagnant oil pocket 77 of high-pressure buffer of sealing relatively, the stagnate hydraulic oil that raises suddenly in the oil pocket 77 of buffering can be extruded along the gap of 10 of servo-actuated valve pocket 41 and valve seats, and the energy that consumes servo-actuated valve pocket 41 slows down servo-actuated valve pocket 41 and finally slowly stops.

As shown in Figure 5, the utility model hydraulic electrohydraulic hammer, the hammer stem that comprises support 39 and vertically be installed in the support 39 drives oil cylinder, the top that hammer stem drives cylinder block 12 is equipped with control valve, control valve shown in Fig. 5 is the state of spool 18 when being in zero-bit, the piston 11 that the upper end of the hammer stem 7 of lower end band tup 8 and hammer stem drive in the cylinder block 12 links to each other, on the piston 11, following two ends have upper cylinder half chamber 13 and following cylinder chamber 14, the effective work area of piston 11 in upper cylinder half chamber 13 is greater than its effective work area in following cylinder chamber 14, following cylinder chamber 14 links to each other with high-pressure oil passage 15 by at least one lower through-hole 22, the quantity of lower through-hole 22 can be 2 or 4 or 6 or 8, high-pressure oil passage 15 is communicated with hydraulic power source by two-position two-way solenoid valve 4, the oil inlet passage of upper cylinder half chamber 13 and oil drain passage communicate with control valve respectively, control valve comprises valve body 9, be provided with servo valve 17 in the valve body 9, be provided with spool 18 in the servo valve 17 slidably, the rear end of spool 18 links to each other with spool control lever 37, when spool 18 is positioned at an end of servo valve 17, control valve connects the oil inlet passage of upper cylinder half chamber 13 and cuts out oil drain passage simultaneously, when spool 18 is positioned at the other end of servo valve 17, control valve cuts out the oil inlet passage of upper cylinder half chamber 13 and connects oil drain passage simultaneously, when spool 18 was positioned at the middle part zero-bit of servo valve 17, control valve cut out the oil inlet passage and the oil drain passage of upper cylinder half chamber 13 simultaneously.

Two ends of servo-actuated valve pocket 41 have the stagnant oil pocket 77 of buffering of annular respectively, and the stagnant oil pocket 77 of buffering is lateral wall and the valve seat 10 inner chambers institute area surrounded by servo-actuated valve pocket 41 2 ends.The top of valve seat 10 sidewalls that match with servo-actuated valve pocket 41 is provided with unloads oilhole 55, unloading the oil pipe line 68 of oilhole 55 by oil drain passage communicates with fuel tank 1, bottom in the valve seat 10 communicates with the top of upper cylinder half chamber 13, valve seat 10 side-walls that match with servo-actuated valve pocket 41 are provided with control chamber 54 from top to bottom successively, normal low-pressure cavity 53 and high-voltage oil cavity 19, the effective work area of servo-actuated valve pocket 41 in control chamber 54 is greater than its effective work area in high-voltage oil cavity 19, normal low-pressure cavity 53 communicates with fuel tank 1 by pipeline, high-voltage oil cavity 19 communicates with high-pressure oil passage 15 by the fast fuel feed hole 16 on the oil inlet passage of upper cylinder half chamber 13, control chamber 54 communicates with the working hole 67 of control valve by pipeline, between the madial wall of the lateral wall of servo valve 17 and valve body 9 from the preceding front wheel driving chamber 56 that then is provided with successively, outer low-pressure cavity 57, outer working chamber 58, outer high pressure chest 59 and rear drive chamber 60, the effective work area of servo valve 17 in front wheel driving chamber 56 is greater than its effective work area in rear drive chamber 60, the front end that is positioned at servo valve 17 in the valve body 9 is provided with preceding low-pressure cavity 61, the rear end that is positioned at servo valve 17 in the valve body 9 is provided with back low-pressure cavity 66, preceding low-pressure cavity 61, back low-pressure cavity 66 and outer low-pressure cavity 57 communicate with fuel tank 1 by pipeline, outer high pressure chest 59 communicates with high-pressure oil passage 15 by pipeline, between the lateral wall of the madial wall of servo valve 17 and spool 18 from preceding then be divided into by the annular shoulder of spool 18 lateral walls successively before inner high voltage chamber 62, interior low pressure oil pocket 63, interior working chamber 64 and inner high voltage chamber, back 65, before inner high voltage chamber 62 and back inner high voltage chamber 65 communicate by the connecting hole 48 that passes spool 18, interior low pressure oil pocket 63 communicates with outer low-pressure cavity 57 by oilhole, interior working chamber 64 communicates with outer working chamber 58 by oilhole, working hole 67 communicates with outer working chamber 58, back inner high voltage chamber 65 communicates with outer high pressure chest 59 and rear drive chamber 60 by oilhole respectively, before the chamber 56 of speeding can alternately communicate respectively by oilhole with preceding inner high voltage chamber 62 or interior low pressure oil pocket 63, outer low-pressure cavity 57 can communicate with outer working chamber 58, and back inner high voltage chamber 65 can communicate with interior working chamber 64.

Bottom in the upper cylinder half chamber 13 has pocketed oil chamber 38, pocketed oil chamber 38 is madial wall, the bottom of valve body 9, the top of piston 11 and the axle journal institute area surrounded on piston 11 tops that driven cylinder block 12 by hammer stem, and the axle journal on piston 11 tops can match with the madial wall of valve body 9 bottoms.When the hammer stem quick return arrives top dead-centre, because hammer stem 7 is driving the tup 8 of big quality, so the inertia that rises is bigger, so the buffer unit on crashproof top must be set.The utility model adopts the principle of pocketed oil chamber 38 and the stagnant oil pocket 77 of buffering, be about to kinetic energy be converted into pressure can mode reach the purpose of hammer stem 7 and servo-actuated valve pocket 41 bufferings, concrete way is the axle journal that processes certain altitude in piston 11 upper ends, the diameter of axle journal is less than piston diameter, form ring-type pocketed oil chamber 38 with certain depth in valve body lower end, when the lower end that hammer stem 7 goes upward to the upper edge of axle journal of piston 11 and pocketed oil chamber 38 overlaps, can form a high pressure pocketed oil chamber 38 of sealing relatively, suddenly the hydraulic oil that raises in the pocketed oil chamber 38 can be extruded along the axle journal of piston 11 and the gap between the valve seat 10, the energy that consumes hammer stem 7 and tup 8 slows down hammer stem 7 and tup 8, finally slowly stops to top dead-centre.For 41 of servo-actuated valve pockets is the stagnant oil pocket 77 of buffering that is respectively equipped with annular at its two end, when servo-actuated valve pocket 41 moves to a certain end, can form a stagnant oil pocket 77 of high-pressure buffer of sealing relatively, the stagnate hydraulic oil that raises suddenly in the oil pocket 77 of buffering can be extruded along the gap of 10 of servo-actuated valve pocket 41 and valve seats, and the energy that consumes servo-actuated valve pocket 41 slows down servo-actuated valve pocket 41 and finally slowly stops.

When work, when touching, needs tup 8 beats soon or energetically fast during strike downwards, can utilize spool control lever 37 that spool 18 is toggled it to the appropriate location backward or dials to the rearmost position, at this moment, preceding inner high voltage chamber 62 communicates with front wheel driving chamber 56 by oilhole, back inner high voltage chamber 65 communicates with rear drive chamber 60 by oilhole, but because the effective work area of servo valve 17 in front wheel driving chamber 56 is greater than its effective work area in rear drive chamber 60, make motion backward under the effect of servo valve 17 oil pressure in front wheel driving chamber 56, so, outer low-pressure cavity 57 communicates with outer working chamber 58, make the oily release in the outer working chamber 58, and make oily release in the control chamber 54 by working hole 67 and pipeline, so, move upward under the effect of servo-actuated valve pocket 41 oil pressure in high-voltage oil cavity 19, bottom and upper cylinder half chamber 13 that order is unloaded in oilhole 55 and the valve seat 10 disconnect, connect with seasonal high-voltage oil cavity 19 and bottom and upper cylinder half chamber 13 in the valve seat 10, hydraulic oil enters in the upper cylinder half chamber 13, because the effective work area of piston 11 in upper cylinder half chamber 13 is greater than its effective work area in following cylinder chamber 14, under the effect of hydraulic oil, piston 11 can move downward fast, is being with tup 8 to hit work done downwards by hammer stem 7.

When needs tup 8 moves upward or move upward fast, can utilize spool control lever 37 that spool 18 is toggled it to the appropriate location forward or dials to the front position, at this moment, front wheel driving chamber 56 disconnects with preceding inner high voltage chamber 62, the chamber 56 of front wheel driving simultaneously communicates with interior low pressure oil pocket 63, make the oily release in the front wheel driving chamber 56, then inner high voltage chamber 65 communicates with rear drive chamber 60 by oilhole, make the oil in the rear drive chamber 60 keep high pressure conditions, so, servo valve 17 travels forward under the effect of oil pressure in rear drive chamber 60, so, back inner high voltage chamber 65 communicates with interior working chamber 64, interior working chamber 64 communicates with outer working chamber 58 again, make the oil in the outer working chamber 58 be in high pressure conditions, and make the high pressure conditions that is in the control chamber 54 by working hole 67 and pipeline, because the moving effective work area of valve pocket 41 in control chamber 54 is greater than its effective work area in high-voltage oil cavity 19, so, move downward under the effect of servo-actuated valve pocket 41 oil pressure in control chamber 54, order is unloaded oilhole 55 and valve seat interior bottom and upper cylinder half chambers 13 10 and is communicated, make oily release in the upper cylinder half chamber 13, disconnect with bottom in seasonal high-voltage oil cavity 19 and the valve seat 10 and upper cylinder half chamber 13, hydraulic oil can't enter in the upper cylinder half chamber 13, because the effective work area of piston 11 in upper cylinder half chamber 13 is greater than its effective work area in following cylinder chamber 14, under the effect of following cylinder chamber 14 inner high voltage oil, piston 11 can move upward at a slow speed or fast, and piston 11 is being with tup 8 also to move upward by hammer stem 7.

When 8 stop motions of needs tup, can utilize spool control lever 37 that spool 18 is stopped appropriate location to middle zero-bit, at this moment, interior working chamber 64 and outer working chamber 58 all disconnect with other chambeies, do not have hydraulic oil to enter or flow out in working chamber 64 and outer working chamber 58, so servo-actuated valve pocket 41 also is in the position that oilhole 55 and high-voltage oil cavity 19 are unloaded in disconnection simultaneously, do not have hydraulic oil to enter or flow out upper cylinder half chamber 13, piston 11 stop motion immediately.

Embodiment recited above is described preferred implementation of the present utility model; be not that design of the present utility model and scope are limited; do not breaking away under the utility model design concept prerequisite; common engineers and technicians make the technical solution of the utility model in this area various modification and improvement; all should fall into protection domain of the present utility model; the technology contents that the utility model is asked for protection all is documented in claims.

Claims

1. hydraulic electrohydraulic hammer, comprise support (39), be fixed with hammer stem in the support (39) and drive oil cylinder, the hammer stem (7) of hydraulic power source and lower end band tup (8), the upper end of hammer stem (7) drives the interior piston (11) of cylinder block (12) with hammer stem and links to each other, on the piston (11), following two ends have upper cylinder half chamber (13) and following cylinder chamber (14), the effective work area of piston (11) in upper cylinder half chamber (13) is greater than its effective work area in following cylinder chamber (14), following cylinder chamber (14) communicates with high-pressure oil passage (15), high-pressure oil passage (15) communicates with hydraulic power source, it is characterized in that: described upper cylinder half chamber (13) communicated with oil inlet passage respectively by the control of control valve or oil drain passage communicates, control valve comprises valve body (9), be provided with servo valve (17) in the valve body (9), be provided with spool (18) in the servo valve (17) slidably, one end of spool (18) links to each other with spool control lever (37), when spool (18) is positioned at an end of servo valve (17), control valve connects the oil inlet passage of upper cylinder half chamber (13) and cuts out oil drain passage simultaneously, when spool (18) is positioned at the other end of servo valve (17), control valve cuts out the oil inlet passage of upper cylinder half chamber (13) and connects oil drain passage simultaneously, when spool (18) was positioned at the middle part of servo valve (17), control valve cut out the oil inlet passage and the oil drain passage of upper cylinder half chamber (13) simultaneously.

2. hydraulic electrohydraulic hammer as claimed in claim 1, it is characterized in that: the top that described hammer stem drives cylinder block (12) is provided with the execution servo valve, carry out servo valve and comprise the valve seat (10) that is fixed on the hammer stem driving cylinder block (12), the inner chamber of valve seat (10) communicates with described upper cylinder half chamber (13), can slide up and down to be provided with servo-actuated valve pocket (41) in the valve seat (10), the bottom of described spool (18) links to each other with the top of servo-actuated valve pocket (41), when spool (18) is positioned at an end of servo valve (17), the oil inlet passage that control valve is connected upper cylinder half chamber (13) by servo-actuated valve pocket (41) is closed oil drain passage simultaneously, when spool (18) is positioned at the other end of servo valve (17), the oil inlet passage that control valve cuts out upper cylinder half chamber (13) by servo-actuated valve pocket (41) is connected oil drain passage simultaneously, when spool (18) was positioned at the middle part of servo valve (17), control valve cut out the oil inlet passage and the oil drain passage of upper cylinder half chamber (13) simultaneously by servo-actuated valve pocket (41).

3. hydraulic electrohydraulic hammer as claimed in claim 1, it is characterized in that: described valve body (9) plug-in mounting is fixed on the top of described support (39) and described hammer stem driving cylinder block (12), be divided into down actuator chamber (27) by the annular shoulder of servo valve (17) lateral wall successively from bottom to top between the madial wall of described servo valve (17) lateral wall and described valve body (9), high-voltage oil cavity (19), carry out chamber (20), oil back chamber (21) and last actuator chamber (28), the upper end that is positioned at servo valve (17) in the described valve body (9) is provided with low-pressure cavity (29), the lower end that is positioned at servo valve (17) in the valve body (9) is provided with down low-pressure cavity (30), described oil back chamber (21) communicates with described fuel tank (1) by the oil pipe line (68) of described oil drain passage, last low-pressure cavity (29) and following low-pressure cavity (30) communicate with described fuel tank (1) by pipeline, described high-voltage oil cavity (19) communicates with described high-pressure oil passage (15) by at least one the fast fuel feed hole (16) on the oil inlet passage of described upper cylinder half chamber (13), described execution chamber (20) can communicate with high-voltage oil cavity (19) or described oil back chamber (21), carrying out chamber (20) communicates with described upper cylinder half chamber (13) by at least one oil-through hole (23), be divided into inner high voltage oil-feed cavity of resorption (32) by the annular shoulder of spool (18) lateral wall successively from bottom to top between the lateral wall of the madial wall of described servo valve (17) and described spool (18), inner high voltage oil pocket (25) and inner high voltage oil-feed epicoele (33), inner high voltage oil-feed cavity of resorption (32) communicates with following actuator chamber (27) by oilhole, described high-voltage oil cavity (19) communicates with inner high voltage oil pocket (25) by oilhole, the described actuator chamber (28) of going up communicates with described inner high voltage oil-feed epicoele (33) by oilhole, described inner high voltage oil-feed cavity of resorption (32) can communicate with described low-pressure cavity (30) down or described inner high voltage oil pocket (25), and inner high voltage oil-feed epicoele (33) can or be gone up low-pressure cavity (29) with inner high voltage oil pocket (25) and communicate.

4. hydraulic electrohydraulic hammer as claimed in claim 2, it is characterized in that: valve seat (10) the madial wall place that matches with described servo-actuated valve pocket (41) is provided with oil-discharging cavity (42) and high-voltage oil cavity (19) from top to bottom successively, high-voltage oil cavity (19) communicates with described high-pressure oil passage (15) by at least one the fast fuel feed hole (16) on the oil inlet passage of described upper cylinder half chamber (13), described oil-discharging cavity (42) communicates with described fuel tank (1) by the oil pipe line (68) of the oil drain passage of described upper cylinder half chamber (13), the top of described servo-actuated valve pocket (41) sidewall is provided with at least one outage (45) that can be communicated with oil-discharging cavity (42) and valve seat (10) cavity of resorption, the top of servo-actuated valve pocket (41) is provided with at least one oil guiding hole (47) that can be communicated with shoe cream room (46) and valve seat (10) cavity of resorption, the cavity of resorption of valve seat (10) communicates with described upper cylinder half chamber (13), described valve body (9) is positioned at the top of valve seat (10), the bottom of described servo valve (17) links to each other with the top of described servo-actuated valve pocket (41), be provided with pressure-releasing cavity (40) between the madial wall of the lateral wall of servo valve (17) and described valve body (9) from bottom to top successively, following actuator chamber (27), oil back chamber (21), last actuator chamber (28) and outer high pressure oil suction chamber (43), the upper end that is positioned at servo valve (17) in the described valve body (9) is provided with low-pressure cavity (29), the lower end that is positioned at servo valve (17) in the valve body (9) is provided with down low-pressure cavity (30), last low-pressure cavity (29), following low-pressure cavity (30) and pressure-releasing cavity (40) communicate with described fuel tank (1) by pipeline, described high pressure oil suction chamber (43) communicates with described hydraulic power source by oil-in (44), be divided into inner high voltage oil-feed cavity of resorption (32) by the annular shoulder of spool (18) lateral wall successively from bottom to top between the lateral wall of the madial wall of described servo valve (17) and described spool (18), interior low-pressure cavity (51) and inner high voltage oil-feed epicoele (33), inner high voltage oil-feed cavity of resorption (32) can communicate with following actuator chamber (27) by oilhole, inner high voltage oil-feed cavity of resorption (32) communicates by the connecting hole (48) that passes described spool (18) with inner high voltage oil-feed epicoele (33), described inner high voltage oil-feed epicoele (33) communicates with outer high pressure oil suction chamber (43) by the repairing hole, the described actuator chamber (28) of going up communicates with interior low-pressure cavity (51) or described inner high voltage oil-feed epicoele (33) by oilhole, described oil back chamber (21) communicates with interior low-pressure cavity (51) by oilhole, and described actuator chamber (27) down can communicate with interior low-pressure cavity (51) or described inner high voltage oil-feed cavity of resorption (32) by oilhole.

5. hydraulic electrohydraulic hammer as claimed in claim 2, it is characterized in that: valve seat (10) the madial wall place that matches with described servo-actuated valve pocket (41) is provided with oil-discharging cavity (42) and high-voltage oil cavity (19) from top to bottom successively, high-voltage oil cavity (19) communicates with described high-pressure oil passage (15) by at least one the fast fuel feed hole (16) on the oil inlet passage of described upper cylinder half chamber (13), described oil-discharging cavity (42) communicates with described fuel tank (1) by the oil pipe line (68) of the oil drain passage of described upper cylinder half chamber (13), the top of servo-actuated valve pocket (41) sidewall is provided with at least one outage (45) that can be communicated with shoe cream room (46) and valve seat (10) cavity of resorption, the cavity of resorption of valve seat (10) communicates with described upper cylinder half chamber (13), described valve body (9) is positioned at the top of valve seat (10), the bottom of described servo valve (17) links to each other with the top of described servo-actuated valve pocket (41), be provided with middle pressure-releasing cavity (70) between the madial wall of the lateral wall of servo valve (17) and described valve body (9) from bottom to top successively, actuator chamber (71) and last high pressure oil suction chamber (72), the effective work area that acts on servo valve (17) in the actuator chamber (71) is greater than in the high-voltage oil cavity (19) and act on effective work area sum of described servo-actuated valve pocket (41) in valve seat (10) cavity of resorption, the upper end that is positioned at servo valve (17) in the described valve body (9) is provided with pressure-releasing cavity (73), the lower end that is positioned at described spool (18) in the servo valve (17) is provided with down pressure-releasing cavity (74), last pressure-releasing cavity (73), following pressure-releasing cavity (74) and middle pressure-releasing cavity (70) communicate with described fuel tank (1) by pipeline, the described high pressure oil suction chamber (72) of going up communicates with described hydraulic power source, be divided into interior pressure-releasing cavity (75) and inner high voltage epicoele (76) by the annular shoulder of spool (18) lateral wall successively from bottom to top between the lateral wall of the madial wall of described servo valve (17) and described spool (18), interior pressure-releasing cavity (75) can communicate with described middle pressure-releasing cavity (70) or described actuator chamber (71) by oilhole, and described inner high voltage epicoele (76) can communicate with described upward high pressure oil suction chamber (72) or actuator chamber (71) by oilhole.

6. hydraulic electrohydraulic hammer as claimed in claim 2, it is characterized in that: the top of valve seat (10) sidewall that matches with described servo-actuated valve pocket (41) is provided with unloads oilhole (55), unloading the oil pipe line (68) of oilhole (55) by described oil drain passage communicates with fuel tank (1), bottom in the described valve seat (10) communicates with the top of described upper cylinder half chamber (13), valve seat (10) side-walls that matches with servo-actuated valve pocket (41) is provided with control chamber (54) from top to bottom successively, normal low-pressure cavity (53) and high-voltage oil cavity (19), the effective work area of servo-actuated valve pocket (41) in control chamber (54) is greater than its effective work area in high-voltage oil cavity (19), normal low-pressure cavity (53) communicates with fuel tank (1) by pipeline, described high-voltage oil cavity (19) communicates with described high-pressure oil passage (15) by the fast fuel feed hole (16) on the oil inlet passage of described upper cylinder half chamber (13), control chamber (54) communicates with the working hole (67) of control valve by pipeline, between the madial wall of the lateral wall of described servo valve (17) and described valve body (9) from the preceding front wheel driving chamber (56) that then is provided with successively, outer low-pressure cavity (57), outer working chamber (58), outer high pressure chest (59) and rear drive chamber (60), the effective work area of servo valve (17) in front wheel driving chamber (56) is greater than its effective work area in rear drive chamber (60), the front end that is positioned at servo valve (17) in the described valve body (9) is provided with preceding low-pressure cavity (61), the rear end that is positioned at servo valve (17) in the valve body (9) is provided with back low-pressure cavity (66), preceding low-pressure cavity (61), back low-pressure cavity (66) and described outer low-pressure cavity (57) communicate with described fuel tank (1) by pipeline, described outer high pressure chest (59) communicates with described high-pressure oil passage (15) by pipeline, between the lateral wall of the madial wall of described servo valve (17) and described spool (18) from preceding then be divided into by the annular shoulder of spool (18) lateral wall successively before inner high voltage chamber (62), interior low pressure oil pocket (63), interior working chamber (64) and inner high voltage chamber (65), back, preceding inner high voltage chamber (62) communicates by the connecting hole (48) that passes described spool (18) with inner high voltage chamber, back (65), interior low pressure oil pocket (63) communicates with outer low-pressure cavity (57) by oilhole, interior working chamber (64) communicates with outer working chamber (58) by oilhole, described working hole (67) communicates with outer working chamber (58), described inner high voltage chamber, back (65) communicates with described outer high pressure chest (59) and described rear drive chamber (60) by oilhole respectively, described front wheel driving chamber (56) can communicate with described preceding inner high voltage chamber (62) or described interior low pressure oil pocket (63) respectively by oilhole, described outer low-pressure cavity (57) can communicate with described outer working chamber (58), and described inner high voltage chamber, back (65) can communicate with described interior working chamber (64).

7. as any one described hydraulic electrohydraulic hammer in the claim 3 to 6, it is characterized in that: the bottom in the described upper cylinder half chamber (13) has pocketed oil chamber (38), pocketed oil chamber (38) is the madial wall that is driven cylinder block (12) by described hammer stem, the bottom of described valve body (9), the axle journal institute area surrounded on the top of described piston (11) and piston (11) top, the axle journal on piston (11) top can match with the madial wall of valve body (9) bottom, described high-pressure oil passage (15) is positioned at the support (39) that drives cylinder block (12) sidewall around hammer stem, and the quantity of described lower through-hole (22) and described fast fuel feed hole (16) is 2-8.

8. as any one described hydraulic electrohydraulic hammer in the claim 2 to 5, it is characterized in that: described hydraulic power source comprises hydraulic pump (2), the inlet of hydraulic pump (2) communicates with described fuel tank (1) by the pipeline that is in series with filter, the liquid outlet of hydraulic pump (2) is in parallel with two-position two-way solenoid valve (4) and hydraulic accumulator (5) respectively by the pipeline that is in series with check valve, two-position two-way solenoid valve (4) communicates with described high-pressure oil passage (15) by pipeline, the control circuit of two-position two-way solenoid valve (4) is electrically connected with travel switch or near switch (6) and hydraulic pump (2), travel switch or match with described hammer stem (7) near the touch device of switch (6), the pipeline place of hydraulic pump (2) liquid outlet is parallel with unloader (3), and the liquid outlet of unloader (3) communicates with described fuel tank (1) by pipeline.

9. as any one described hydraulic electrohydraulic hammer in the claim 4 to 6, it is characterized in that: two ends of described servo-actuated valve pocket (41) have the stagnant oil pocket (77) of buffering of annular respectively, and the stagnant oil pocket (77) of buffering is lateral wall and described valve seat (10) the inner chamber institute area surrounded by described servo-actuated valve pocket (41) two ends.

10. hydraulic electrohydraulic hammer as claimed in claim 3, it is characterized in that: described low-pressure cavity (30) down communicates by the centre bore (31) that passes described spool (18) with last low-pressure cavity (29), last low-pressure cavity (29) or following low-pressure cavity (30) communicate with described fuel tank (1) by pipeline, and the quantity of described oil-through hole (23) is 2-8.