CN201891687U - Rotary hydraulic system capable of realizing free slip-rotation and centering of arm bracket - Google Patents

Abstract

The utility model relates to a rotary hydraulic system capable of realizing free slip-rotation and centering of an arm bracket, which is provided with a reversing valve, a cushion valve, a shuttle valve, a rotary motor and a rotary brake, and is characterized in that a two-linked two-position three-way solenoid valve is additionally arranged in the system, an A1 port and a B1 port of one link of the two-linked two-position three-way solenoid valve are connected between the shuttle valve and the brake, an A2 port is connected to the small cavity of an amplitude cylinder, and the other link of the two-linked two-position three-way solenoid valve is connected between the rotary motor and the cushion valve in parallel; a rotary angle detection device is arranged between the arm bracket and an arm support, and the output of the rotary angle detection device is connected with a control relay of the two-linked two-position three-way solenoid valve. In the utility model, the arm bracket falls off in front of the arm support through amplitude change, an electrical signal transmitted from the rotary angle detection device of the arm bracket is sent to a solenoid valve bank, the solenoid valve is reversed after being electrified, amplitude-change pressure oil enters the brake through the solenoid valve, the brake is switched on, an oil inlet and an oil outlet of the motor are communicated, so as to realize free slip-rotation and centering of the arm bracket under the action of external force.

Description

Freely the trackslip Hydraulic slewing system of centering of jib

Technical field

The utility model is that a kind of boom type operating vehicle falls arm during to support, freely the trackslip Hydraulic slewing system of centering of jib.

Background technique

At present, generally the jib operating vehicle Hydraulic slewing system of Shi Yonging is fairly simple, does not have the function of jib automatic centering, as shown in Figure 4, form by selector valve, trimmer valve, shuttle valve, rotary motor, trainstop, selector valve commutation during revolution work, pressure oil arrives motor through trimmer valve, open break by shuttle valve simultaneously, make the motor rotation drive whole jib rotation, selector valve is got back to meta when stopping, and motor stops operating, the break braking, whole jib can not rotate.The general job car after hours, jib need be recovered on the support, this process is earlier jib to be turned round aligning arm support (see figure 1), again with the jib luffing to dropping to (see figure 2) on the arm support, because jib revolution aligning arm support is observed by manual operation and is realized, do not note slightly as operation, jib just can not (see figure 3) entirely on the center, needs the multi-pass operation revolution could the centering (see figure 1), is very much trouble, as not again centering continue to fall arm, owing to there is not the centering function of freely trackslipping, jib can not rotate, and will cause jib and support to interfere the (see figure 3) of colliding, support produces distortion, drop on the support to extremely up to arm, the time has been grown and has caused arm and support to damage, if break can be opened, motor is imported and exported and is communicated, and arm just can avoid deformation of timbering to damage along support chamfered edge landing limit rotation.

Summary of the invention

The purpose of this utility model provides freely the trackslip Hydraulic slewing system of centering of a kind of jib, and this system is before jib is fallen support, break can be opened, and motor is imported and exported and communicated, and makes can freely the trackslip rotary system of centering of jib.

The purpose of this utility model is to realize like this, freely the trackslip Hydraulic slewing system of centering of a kind of jib, be provided with selector valve, trimmer valve, shuttle valve, rotary motor and trainstop, it is characterized in that, have additional a bigeminy two-position three way magnetic valve in the system, this bigeminy two-position three way magnetic valve wherein one A1 mouth, B1 mouth is connected between shuttle valve and the break, and the A2 mouth is connected to the derricking cylinder loculus; Another connection of this bigeminy two-position three way magnetic valve is parallel between rotary motor and the trimmer valve;

Simultaneously, be provided with the angle of revolution detection device between jib and arm support, the output of this angle of revolution detection device connects the control relay of described bigeminy two-position three way magnetic valve.

Optimized project of the present utility model is:

Described angle of revolution detection device adopts rotating coder;

The debugging numerical value of described rotating coder setting is: angle is when positive and negative 1 spends between jib revolution and arm support, and the angle of revolution detection device issues a signal to control relay.

In other words, optimized project of the present utility model is (with reference to Fig. 6): be provided with angle of revolution detection device (rotating coder B2) simultaneously on jib, angle is when positive and negative 1 spends between jib revolution and arm support, the angle of revolution detection device issues a signal to controller 50, via controller calculates and outputs a control signal to relay K 16, relay K 16 gets electric, electromagnet YH, the YG energising of bigeminy two-position three way magnetic valve, solenoid valve commutation.Break is opened, motor oil inlet and outlet UNICOM.

The utility model is the electromagnetic valve group that increases a bigeminy in Hydraulic slewing system, the A1 mouth of a di-position-3-way solenoid valve wherein, the B1 mouth is connected between shuttle valve and the break, the A2 mouth is connected to the derricking cylinder loculus, another connection is parallel between rotary motor and the trimmer valve, can realize that like this jib luffing is before dropping to arm support, the electrical signal that sends by detecting switch sends to electromagnetic valve group, make solenoid valve get electric commutation, luffing pressure oil enters break through solenoid valve, break is opened, motor oil inlet and outlet UNICOM simultaneously realizes the jib centering of freely trackslipping under external force.

Description of drawings

Fig. 1, Fig. 2 are jib of the prior art operating vehicle Hydraulic slewing system structural representation;

Fig. 3 is the situation schematic representation that traditional rotary system jib can not be entirely on the center;

Fig. 4 is traditional rotary system hydraulic schematic diagram;

Fig. 5 is freely the trackslip rotary system hydraulic schematic diagram of centering function of the utility model band;

Fig. 6 is freely the trackslip rotary system electrical control figure of centering function of the utility model band.

Embodiment

Embodiment 1, and jib freely trackslips the Hydraulic slewing system of centering with reference to Fig. 4, Fig. 5.Break 1 among Fig. 4, rotary motor 2, and trimmer valve 3, shuttle valve 4, when slewing directional control valve 5, slewing directional control valve are not worked, the break braking, motor oil inlet and outlet closure, jib can't freely trackslip.

Break 1 among Fig. 5, rotary motor 2, trimmer valve 3, shuttle valve 4, slewing directional control valve 5, electromagnetic valve group 6, amplitude oil cylinder 7, luffing equilibrium valve 8, luffing selector valve 9.When needs are received arm, selector valve 5 commutations during jib revolution centering, pressure oil enters from the P mouth, pass through shuttle valve 4 through selector valve, trimmer valve 3 is to rotary motor 2, pressure oil is through shuttle valve 4, by the A1 of electromagnetic valve group 6 simultaneously, the B1 mouth enters break 1, and break is opened, the motor rotation, behind the jib aligning arm support, selector valve 5 is got back to meta, and motor 2 stops revolution, break 1 braking, it is downward that this moment, jib began luffing, 9 commutations of luffing selector valve, and pressure oil is through selector valve 9, luffing equilibrium valve 8, entering amplitude oil cylinder 7 loculuses makes the jib luffing downward, the electrical signal that detecting switch sends when arm support makes the YG of electromagnetic valve group 6, YN solenoid valve energising commutation, luffing pressure oil is through electromagnetic valve group A2, the B1 mouth enters break 1, break is opened, simultaneously the motor oil inlet and outlet is by YN solenoid valve UNICOM, if this moment, jib did not have entirely on the centerly, the downward luffing of jib is during to arm support, the arm support prism is pushing away jib and is trackslipping until centering, and jib receives that support finishes.

The square of figure middle and upper part is the jib cross section; Its underpart is an arm support.

Claims (2)

1. the jib Hydraulic slewing system of centering of freely trackslipping, be provided with selector valve, trimmer valve, shuttle valve, rotary motor and trainstop, it is characterized in that, have additional a bigeminy two-position three way magnetic valve in the system, this bigeminy two-position three way magnetic valve wherein one A1 mouth, B1 mouth is connected between shuttle valve and the break, and the A2 mouth is connected to the derricking cylinder loculus; Another connection of this bigeminy two-position three way magnetic valve is parallel between rotary motor and the trimmer valve;

Simultaneously, be provided with the angle of revolution detection device between jib and arm support, the output of this angle of revolution detection device connects the control relay of described bigeminy two-position three way magnetic valve.

2. freely the trackslip Hydraulic slewing system of centering of jib according to claim 1 is characterized in that described angle of revolution detection device adopts rotating coder.

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