Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide an electro-hydraulic switch machine which can accurately adjust the stroke of an actuating member so that a plurality of switch machines for pushing switch rails or point rails to switch points can synchronously and uniformly act.
A further object of the present invention is to provide an electro-hydraulic switch machine capable of achieving precise switching of the locking and unlocking action members.
The invention further aims to provide the electro-hydraulic switch machine which can effectively shorten the actual moving distance of the piston so as to greatly reduce the overall dimension.
A further object of the present invention is to provide an electrohydraulic switch machine which can effectively shorten the actual moving distance of an intermittent actuating plate for turning on and off an electric signal indicating mechanism, thereby greatly reducing the overall dimension.
A further object of the present invention is to provide an electrohydraulic switch machine which can be conveniently and safely switched to a manual operation mode, and which is safe, simple, quick and portable in operation.
The invention further aims to provide the electro-hydraulic switch machine with good complete machine sealing performance.
The purpose of the invention is realized as follows:
an electro-hydraulic switch machine comprises an electric motor, a hydraulic assembly, a transmission mechanism, a conversion locking mechanism and a representation mechanism, wherein the electric motor is connected with a hydraulic cylinder device through an oil pump in the hydraulic assembly to drive the hydraulic cylinder device; wherein: the hydraulic cylinder device in the hydraulic assembly is characterized in that a cylinder body of an oil cylinder is fixed, and a piston in the oil cylinder moves; the piston rod in the hydraulic assembly is processed into a rack tooth shape to form a piston rack, the piston rack is connected or contacted with the action parts in the conversion locking mechanism and the indication mechanism through a power output part, namely an action rack, of the transmission mechanism formed by a gear rack, so that an action rod component in the conversion locking mechanism for driving the switch rail or the point rail moves or is locked, and the movable contact point group in the indication mechanism correspondingly acts to provide a related indication of positioning or reverse position by combining with a set static contact point group.
Furthermore, the transmission mechanism comprises an output gear, an input gear and an action rack, the output gear and the input gear are fixed on a spline shaft which is rotatably arranged on the rack, the input gear is meshed with the piston rack, the output gear is meshed with the action rack, the action rack is connected with the action rod assembly through the conversion locking mechanism and is connected with the action contact group in the representation mechanism through an action piece.
The output gear and the input gear can be both sector gears, and the piston rack and the action rack are arranged on two sides of the spline shaft in parallel.
The conversion locking mechanism can be a structure in the existing switch machine, and is preferably a double-locking-column structure in the invention, which comprises an action piece connected or contacted with the action rack, wherein the action piece is a left locking column and a right locking column which can be clamped on the action rod assembly in a vertically movable manner and have the same appearance, a left groove and a right groove are arranged on the side surface of the action rack adjacent to the action rod assembly, a left locking notch and a right locking notch are arranged on a track surface of a frame supporting the action rod assembly and providing the action rod assembly to slide, and a side surface between the two grooves on the action rack is a locking surface;
the relationship of the groove on the action rack, the notch on the track and the locking post on the action rod assembly is as follows: the distance between the two locking columns is equal to the distance between the adjacent ends of the two grooves; the distance between the two locking notches corresponds to the reciprocating stroke of the action rod assembly; the two grooves are equal in length and larger than the diameter of the locking column.
This allows the following relationships:
when the locking column is arranged in the locking notch and the locking surface is positioned on the locking column, the locking column is clamped in the notch, so that the action rod assembly is in a locking state, namely an end point of the reciprocating stroke of the action rod assembly;
when one groove is correspondingly arranged in one locking column in the notch, the other groove is correspondingly arranged in the other locking column which is not arranged in the other locking notch, so that the action rod assembly is in a state of being unlocked or locked;
when one locking column corresponds to one groove on the same side, the other locking column corresponds to the other groove on the same side, namely the action rod assembly is in an unlocking state;
the locking state is achieved when the action rod assembly is at both end points of the reciprocating stroke.
When the action rack moves for a set distance, the locking column playing a locking role relatively comes to the position of the same side end, which is closer to the locking column, in the groove of the same side, and the locking column on the other side correspondingly comes to the other end of the groove of the side.
Both ends of the groove and the locking notch are preferably cambered surfaces which are the same as the cylindrical surfaces of the locking columns. In this way, the center distance of the two locking columns is equal to the distance between the centers of the circular arc end surfaces at the inner sides of the two grooves; the distance between the two locking notches is the length of the reciprocating movement stroke of the point rail or the point rail drawn by the point switch.
And an elastic piece is arranged on the bottom surface of the locking notch.
The actuating rod assembly is provided with an extruding and separating device and comprises an actuating rod and an extruding and separating body, the actuating rod is sleeved in the extruding and separating body, the extruding and separating body is provided with the actuating piece which is used for being connected or contacted with the actuating rack, the actuating piece can be specifically a double locking column which is embedded in the extruding and separating body, the extruding and separating body is arranged on the track of the rack through the two locking columns, and the side surface of the actuating rack opposite to the rack is provided with the groove.
The squeezing-out device on the action rod assembly can be as follows: in the vertical direction perpendicular to the moving direction of the action rod assembly, an extruding and removing pin hole and an extruding and cutting pin hole are correspondingly arranged on the action rod and the extruding and removing body, an extruding and cutting pin is arranged in the extruding and cutting pin hole, and a gap is formed between the extruding and cutting pin and the hole wall of the extruding and cutting pin hole; the hole wall of the extrusion-release pin hole is provided with a joint of an action rod and an extrusion-release body, an extrusion-release device is arranged in the extrusion-release pin hole and comprises an extrusion-release pin, an extrusion-release piece, an extrusion-release column and a disc spring group, the disc spring group is arranged in the extrusion-release pin hole, the extrusion-release column, the extrusion-release piece and the extrusion-release pin are sequentially arranged on the disc spring group, and two ends of the extrusion-release pin hole are provided with screwed plugs, namely an upper plug and a lower plug; the squeezing-out piece is positioned at a joint of the action rod and the squeezing-out body, and two opposite side surfaces of the squeezing-out piece are arc-shaped surfaces corresponding to the joint.
The extrusion-separation device provided by the invention has the advantages that a gap is reserved between one extrusion-cutting pin and the pin hole, and the extrusion-separation device can be designed into a safety pin which can be broken off under a set external force and is broken off when a branch is extruded. And the other pin is designed into an extruding and stripping pin structure, when slight external force exists, the cambered surface of the extruding and stripping piece positioned at the joint of the action rod and the extruding and stripping body can provide rolling, the pin body cannot be damaged, and the gap between the extruding and cutting pin and the pin hole is ensured to be completely free from stress under the condition of slight external force. When the fork squeezing phenomenon occurs, the squeezing pin slips along with the breaking of the squeezing pin, so that the action rod is separated from the squeezing body. Therefore, the normal work of the squeezing and stripping device can be well ensured.
The extrusion piece is an extrusion cylinder with an axis perpendicular to the movement direction of the action rod.
The clearance between the extrusion cutting pin and the extrusion cutting pin hole is preferably 0.5 mm.
The connection structure of the action rack and the movable contact point group in the indication mechanism can be the structure of the existing switch machine, and the invention provides a preferable connection structure which is characterized in that: the action rack is connected with the movable contact group through an action piece, namely an intermittent starting plate, and a fracture is arranged on a rack rail for providing sliding of the intermittent starting plate; the intermittent starting plate is provided with a high-position contact surface and low-position contact surfaces which are positioned on two sides of the high-position contact surface and have the same length, three sections of contact surfaces are connected through a slope surface, two movable contact groups are hinged on the rack, and the three sections of contact surfaces are alternatively connected with two static contact points in two groups of four static contact point groups fixed on the rack, namely, each movable contact point group is arranged on the high-position contact surface and the low-position contact surface on the intermittent starting plate and is respectively combined with a different static contact point group in one group;
a long groove is arranged on the intermittent starting plate along the moving direction of the action rod assembly, and a bulge fixedly arranged on the action rack is movably arranged in the long groove along the long groove; the intermittent starting plate is hinged with a linkage plate near two ends of the long groove respectively, and the linkage plate comprises: when the linkage plate is arranged on the track, the linkage plate and the end part of the long groove are respectively positioned at two sides of the protrusion to clamp two moving directions of the protrusion in the long groove, so that the intermittent starting plate and the power output part move synchronously; when the linkage plate falls into the fracture, the linkage plate is out of the moving path of the lug, so that the lug can move in the direction in the long groove, and the intermittent starting plate does not move along with the action rack;
the intermittent type formula starts on the board and links up two of high-order contact surface and low level contact surface respectively be provided with a fast acting tablet next door, its articulated or movably setting is in on the intermittent type formula starts the board it corresponds every fast acting tablet sets up a reset spring, and it supports and lean on corresponding fast acting tablet, and makes a part of this fast acting tablet lean on domaticly, form with domatic confession move another domatic slide that contact group slided, and this domatic slide is more steep.
The contact surface on the track, the intermittent start plate and the elongated slot are all parallel to the reciprocating direction of the power output member.
In the foregoing technical solution, the mutual relationship among the fracture length, the high contact surface, the low contact surface, and the length of the slope surface therebetween is as follows: when the contact point of the movable contact point group on one side and the intermittent starting plate is from the low contact surface to the high contact surface, the contact point of the movable contact point group on the other side and the intermittent starting plate is also positioned on the high contact surface, the linkage plate on the other side can only fall into the fracture to release the clamping of the protrusion, and the linkage plate on the one side is still in the fracture; when the motion rack pushes the intermittent starting plate to the end point of one side of reciprocating motion, the contact point of the motion contact point group of the other side and the intermittent starting plate is positioned on the low contact surface of the side.
The distance from the low contact surface to the high contact surface corresponds to the movement distance of the action rack, and corresponds to the difference between the length of the groove on the action rack and the diameter of the locking column, or each end point of the reciprocating stroke of the action rack is a section which is longer than the end point of the corresponding side of the reciprocating stroke of the action rod assembly, and the section distance is the distance for the action rack to move from the low contact surface to the high contact surface of the action contact group. Or the distance from the low contact surface to the high contact surface corresponding to the movement of the action rack corresponds to the difference between the length of the groove on the action rack and the diameter of the locking column.
To meet industry requirements for unlocking after the disconnection indication in the conversion process.
The action rod component and the indicating mechanism are organically combined together, the action rod component completes the unlocking-conversion-locking process, and the indicating mechanism completes the cutting-off indicating-giving process.
The indicating mechanism also comprises an indicating rod which is arranged on the frame in a sliding way, when in use, the indicating rod is connected with the switch rail or the point rail, and the indicating rod can realize the condition that the action rod pushes the switch rail or the point rail to be in place or not.
The display rod is a sleeve type display rod and comprises an outer display rod and an inner display rod which are sleeved with each other, and a notch is arranged on the outer display rod at one end of the display rod to enable the end of the inner display rod to be exposed; connecting structures are arranged at the end parts of the inner and outer indication rods at the end.
The nesting parts of the outer and inner indication rods are both circular in cross section.
And a sealing ring is arranged between the sleeve parts of the outer and inner indication rods.
And a sealing ring is arranged on the outer side wall of the circular cross section of the position, corresponding to the box wall of the switch machine box, of the outer indication rod.
The indicating rod comprises a locking device which is: the display rod is provided with two gaps, the gap on one side is arranged on the outer display rod, the gap on the other side is arranged on the overlapped part of the inner display rod and the outer display rod, the outer display rod is provided with a through groove, and the exposed inner display rod is provided with the other gap; or, an inner indication rod check block is detachably and fixedly arranged on the exposed inner indication rod, and the notch is formed in the inner indication rod check block.
Correspondingly, two hinging shafts fixedly connected with the movable contact group in the representation mechanism on the frame are fixedly connected with a contact throw respectively in a synchronous rotating manner with the movable contact group, and the position relation between the two notches on the representation rod and the two contact throws and the relation between the circumferential included angles of the movable contact group and the contact throws on the hinging shafts are as follows: when the indicating rod reaches the end point of the reciprocating stroke, namely is in place, under the driving of the switch rail or the point rail, the contact throw at the corresponding end swings with the swing of the movable contact group and is inserted into the notch at the corresponding side, and the contact throw is withdrawn from the notch with the swing of the movable contact group in the starting of the next stroke; and a tension spring is connected between the two movable contact groups.
The breach is inclined breach or inclined groove, and the incline direction is: corresponding to the insertion direction of the contact crutch;
the part of the contact pin inserted into the notch has a gap with the side wall of the notch.
The inner side groove walls of the two notches are hinged with inspection sheets which are abutted against inspection sheet springs arranged on the indication rods, and the inspection sheets form groove walls which are steeper than the inner side groove walls of the notches at the upper parts of at least the notches.
The indicating rod is hinged with an inspection sheet beside each notch, an inspection sheet spring is arranged on the indicating rod beside each inspection sheet, one end of the inspection sheet spring abuts against the indicating rod, and the other end of the inspection sheet spring abuts against the corresponding inspection sheet, so that the inspection sheet is inserted into the notch to form a notch side wall which is steeper than the edge of the notch with a slower gradient.
Specifically, for a notch arranged on the outer indication rod, the outer indication rod is hinged with the inspection sheet to form an outer inspection sheet, the outer indication rod is provided with an inspection sheet spring to form an outer inspection sheet spring, one end of the outer inspection sheet spring abuts against the outer indication rod, and the other end of the outer inspection sheet spring abuts against the corresponding outer inspection sheet, so that the outer inspection sheet is inserted into the notch to form a notch side wall which is steeper than the notch edge; to setting up including showing the breach on the pole inspection piece, it is articulated the inspection piece is interior inspection piece to set up inspection leaf spring and be interior inspection leaf spring, this interior inspection leaf spring's one end is supported on interior demonstration pole inspection piece, the other end supports on interior inspection piece, make the inspection piece spy in the breach forms one ratio breach lateral wall that the breach edge is more steep.
The switch machine also comprises a manual mechanism for manually driving the driving member of the transmission mechanism instead of the piston rack in the electric drive. Which comprises a planetary gear transmission mechanism and a manual output gear lifting mechanism in the transmission mechanism,
the planetary gear transmission mechanism comprises an input shaft, the input shaft is rotatably fixed on the frame, an eccentric shaft section is arranged on the input shaft, the shaft section is parallel to the axis of the input shaft, an external gear is fixedly arranged on the eccentric shaft section, an internal gear is fixedly arranged on the frame, and the external gear is meshed with the internal gear to form the planetary gear transmission mechanism; an output shaft is rotatably arranged on the frame and is superposed with the axis of the input shaft, one end of a transmission column is arranged on the output shaft, one or more transmission columns are arranged, and the other end of the transmission column is inserted in a hole correspondingly arranged on the external gear;
the lifting mechanism comprises a hand-operated output gear which is circumferentially and fixedly arranged on an input shaft in the transmission mechanism, a lifting block is fixedly arranged on one side end face of the lifting mechanism, one end of a mandril is fixedly arranged on the lifting block, the other end of the mandril is provided with a mandril sleeve, and the mandril sleeve is arranged on a lifting slope surface track of a lifting support; the lifting support is connected with an action block, a long hole is formed in the action block, and an eccentric block is arranged in the long hole; the frame is provided with a hand crank, one end face of the hand crank and the end face corresponding to the eccentric block are respectively provided with a radial convex edge and a radial groove, and the hand crank and the eccentric block are connected together through the radial convex edge and the radial groove.
A pipeline is arranged between two liquid inlet and outlet ports of the oil cylinder in the hydraulic assembly, and a control valve is arranged on the pipeline.
The top rod sleeve can be provided with a roller wheel which is contacted with a lifting slope surface rail of the lifting support.
The input shaft is connected with a hand crank inner rod, a hand crank outer sleeve is sleeved outside the input shaft, the hand crank outer sleeve is the hand crank connected with the end face of the eccentric block, and the hand crank outer sleeve and the hand crank inner rod are combined into a hand crank.
The oil tank, the oil pump, the valve and the oil cylinder in the hydraulic assembly are fixedly connected into a whole, and an oil pipeline between the oil tank, the oil pump, the valve and the oil cylinder is arranged in an oil way block.
The oil cylinder is a double-acting oil cylinder and comprises two oil cylinders arranged on the left side and the right side, two pistons are arranged on two sides of a piston rod in the middle respectively, the two pistons are arranged in the oil cylinders respectively, and the side surfaces of the piston rod, which are positioned at the two middle parts outside the oil cylinders, are provided with the racks to form the piston racks.
The two oil cylinders are concentrically arranged.
An oil pipe branch is arranged between the two oil outlets of the oil pump and an oil way communicated with the two oil cylinders, so that the two chambers outside the pistons of the two oil cylinders are communicated, and a stop valve is arranged on the oil pipe branch. The stop valve is the control valve.
The electro-hydraulic switch machine comprises a case, wherein the representation mechanism also comprises a sealing structure, two representation rods in the representation mechanism are an outer representation rod and an inner representation rod which are mutually sleeved together, the sleeved parts of the two representation rods are both circular sections, one end of each of the sleeved parts extends out of the case body, and a sealing ring is arranged between the sleeved parts of the two representation rods; a display rod through hole is formed in the case for the display rod to extend out, and a sealing ring is arranged on the outer side wall of the circular section of the position, corresponding to the case wall, of the outer display rod; and/or the presence of a gas in the gas,
the actuating rod component connected with the hydraulic assembly and used for drawing the switch rail or the point rail is of a circular section, a perforated hole of the actuating rod component is fixedly arranged on the chassis and used for extending the actuating rod component, and a sealing ring is arranged on the perforated hole of the actuating rod component and used for sealing a gap between the actuating rod component and the perforated hole of the actuating rod component; and/or the presence of a gas in the gas,
and the motor, the oil pump, the oil tank and the hydraulic device in the hydraulic assembly are fixed into a whole and are all arranged in the machine box.
The case comprises a case body and a case cover, and a sealing gasket is arranged between the case body and the case cover.
The electro-hydraulic switch machine has the following external dimensions: the length is not more than 600 mm; and/or the presence of a gas in the gas,
the width is not more than 330mm, and the height is not more than 300mm, so that the tongue can be arranged beside the rail or between two switch rails.
The electro-hydraulic switch machine provided by the invention can accurately realize synchronous and consistent operation of a plurality of switch machines for pushing the switch points to be converted by the switch rails by arranging a reasonable transmission mechanism. Through other combined corresponding improvements, the point switch has the advantages that locking and unlocking action parts can be accurately converted, the actual moving distance of the indicating piece can be effectively shortened, the overall dimension of the point switch can be greatly reduced, the point switch can be conveniently and safely converted into a manual operation mode, the operation is simple and light, and the sealing performance of the point switch is good.
Detailed Description
As shown in fig. 1, 2, 3 and 15, the present invention provides an electro-hydraulic switch machine comprising an electric motor 14, a hydraulic assembly 1, a transmission mechanism 2, a switching locking mechanism 3 and a presentation mechanism 4, which are connected to each other.
The oil cylinder 16 in the hydraulic assembly 1 is a double-acting oil cylinder; the cylinder body of the oil cylinder is fixed, and the piston moves; the two cylinders 161 and 162 are concentrically arranged. The three-phase AC motor 14 is connected with an oil pump through a motor oil pump transmission shaft 13, and the oil pump is connected with the oil tank 11 and the oil cylinder 16 through an integrated oil pipeline 15. The piston rod in the hydraulic assembly 1 is processed into a rack tooth shape to form a piston rack 17, the piston rack 17 is connected or contacted with the conversion locking mechanism and the indication mechanism through the transmission mechanism 2 formed by a gear rack, so that an action rod component used for driving the switch rail in the conversion locking mechanism moves and locks, and a movable contact point group in the indication mechanism correspondingly acts to give a related indication of positioning or reverse in combination with a set static contact point group.
Through set up rack and pinion drive mechanism between action bars subassembly and hydraulic assembly, just can make the removal stroke of action bars subassembly not receive the influence of piston removal stroke, guarantee the accuracy of removal. Different displacement strokes of a plurality of point switches for drawing the switch rails can be conveniently and accurately realized by adjusting corresponding parameters of the gear and the rack in the transmission mechanism.
Specifically, as shown in fig. 3, the transmission mechanism 2 includes an output gear 22, an input gear 23 and an actuating rack 21, the output gear 22 and the input gear 23 are fixed on a spline shaft 24 rotatably disposed on the machine frame, i.e. the cabinet of the switch machine, the input gear 23 is engaged with the piston rack 17, the output gear 22 is engaged with the actuating rack 21, and the actuating rack 21 is connected with the change-over locking mechanism 3 and connected with an actuating rod assembly for driving the switch point through the change-over locking mechanism 3.
The electro-hydraulic switch machine comprising the transmission mechanism has the advantages that for different strokes, the piston rack and the input gear meshed with the piston rack can be the same, and only different output gears and action racks are replaced. In such a switch machine, the point rail or the point rail is driven at a plurality of points, and although the reciprocating strokes of the actuating rod assemblies are different, accurate synchronization can be ensured.
The output gear 22 and the input gear 23 are both sector gears, and the piston rack 17 and the action rack (21) are arranged on two sides of the spline shaft 24 in parallel. Such a construction makes the construction of the switch machine more compact.
By means of the transmission mechanism 2, the piston rack 17 and the input gear 23 meshed with the piston rack can be the same for the switch machines with different strokes, and only the output gear 22 and the action rack 21 with different parameters are replaced.
The structure can make the structure of the switch machine more compact, and the reciprocating stroke of the piston can be effectively reduced when the set reciprocating stroke of the action piece is reached because of the synchronous transmission mechanism.
The output rack, i.e. the action rack 21, in the rack and pinion mechanism of the transmission mechanism 2 is connected with an action rod assembly in the conversion locking mechanism through a conversion locking structure of double locking columns, and the specific structure can be as follows.
As shown in fig. 4 and 7, the actuating lever assembly includes an actuating lever 31 and an extruding body 32 which are fixedly coupled together. The action rod assembly is connected with an action rack 17 in the transmission mechanism through a conversion locking mechanism. The switching locking mechanism comprises a double locking post 35, two recesses provided on the actuation rack 17 and two locking notches provided on the rail supporting and on which the actuation rod assembly moves.
As shown in fig. 4 to 6, the pushing-out body 32 provided outside of the actuating rod assembly is provided with a left locking column 351 and a right locking column 352 along the moving direction, a left groove 21a and a right groove 21b provided on the side surface of the actuating rack 21 adjacent to the pushing-out body 32, and a frame for supporting the actuating rod assembly, specifically, a left locking notch 31a and a right locking notch 31b provided on the rail surface for providing the actuating rod assembly on the display rod frame fixed on the chassis. The side 21c of the actuating rack 21 between the two grooves is a locking surface, when the left locking cylinder 351 is placed in the left locking notch 31a and the locking surface 21c is located on the locking cylinder 351, the locking cylinder 351 is locked in the notch 31a, so that the actuating rod assembly is in a locking state, and the right locking cylinder 352 is placed at the right end of the right groove 21b, and at this time, the actuating rod assembly is at the left end of the reciprocating stroke (as shown in fig. 4). When the right locking post 352 is disposed in the right locking notch 31b and the locking surface 21c is disposed on the locking post 352, the right locking post 352 is caught in the notch 31b, so that the actuating rod assembly is in a locked state, and the left locking post 351 is disposed at the left end of the left recess 21a, and at this time, the actuating rod assembly is at the right end of its reciprocating stroke (as shown in fig. 6). When the action rod component is at two end points of the reciprocating movement stroke, the action rod component is acted by the force from the switch rail and does not move, namely, the action rod component is in the locking state.
As shown in fig. 4, when the actuating rack 21 is driven by the electro-hydraulic assembly to move in the opposite direction, the right locking column 352 that is not disposed in the right locking notch 31b moves from the right end of the corresponding right groove 21b to the left end thereof, and in the process, the locking surface 21c on the actuating rack on the left locking column 351 leaves, the left groove 21a comes on the left locking column, and in the process, the actuating rack moves without moving the actuating rod assembly, and when the right locking column 352 reaches the groove and the actuating rack 21 continues to move, the actuating rack 21 pushes the right locking column 352, which pushes the actuating rod assembly to move rightward, and the left locking column 351 also comes out of the locking notch 31 a. So that the action bar assembly can move on the track and is in an unlocked and closed state, namely an unlocked state shown in fig. 5. Until the right locking column 352 enters the right locking notch 31b on the rail, at this time, the left locking column 351 is still at the right end of the left groove 21a, and the actuating rack 21 has not yet reached the end point of its stroke, but in the following process, the movement of the actuating rack 21 cannot withdraw the locking column sunk into the right locking notch, so that the actuating rod assembly is not moved, but only the actuating rack 21 is moved, so that the left end of the left groove abuts against the left locking column.
Therefore, the distance between the two locking notches is the length of the reciprocating travel of the traction point of the switch machine.
The relation between the locking post, the two grooves and the two locking notches is as follows: when the locking post on one side is arranged in the locking notch on the same side, the locking post on the other side is arranged on the same side end of the groove on one side of the locking post. And the distance from the center of the locking column in the locking notch to the center of the near-end arc of the groove on the same side is d, and the distance from the center of the other locking column to the center of the arc of the other end of the groove is d1, then d = d 1. Therefore, when one end of the groove on the action rack pushes the locking column on one side during unlocking, the other locking column trapped in the locking notch is required to correspond to the groove on the action rack on the other side, so that unlocking can be realized.
The locking post is a cylindrical cylinder, and the two ends of the groove are cylindrical wall surfaces matched with the cylindrical cylinder of the locking post.
According to the conversion locking mechanism with the double locking columns, the locking columns and the cylindrical surfaces of the grooves and the locking notches enable the locking columns to smoothly enter and exit the grooves and the locking notches, and the structure enables the locking and unlocking conversion to be convenient.
Furthermore, it is preferable that the distance between the centers of the two locking posts is equal to the distance between the centers of the arc surfaces on the inner sides of the two grooves, i.e., when both locking posts are not in the locking notch but are located at the middle position of the formation, both locking posts are at the adjacent ends of the grooves on the corresponding sides, as shown in fig. 5.
The distance d is not easy to be too small, otherwise, if some vibration exists on one side of the switch rail, the locking can be released, and the locking is not stable. The distance d may typically take the value of 20 mm. The design can ensure that the switch machine can reliably keep the locking state if vibration occurs when the switch machine is in the locking state.
As shown in fig. 7 and 8, the actuating rod assembly of the extrusion-release device provided by the present invention includes an actuating rod 31 and an extrusion-release body 32, and the extrusion-release device is provided on the actuating rod, wherein the extrusion-release device provided on the actuating rod is: the action rod 31 is sleeved in an extrusion body 32, and two pin holes are correspondingly arranged on the action rod and the extrusion body in the vertical direction perpendicular to the moving direction of the action rod, wherein an extrusion pin hole formed by an extrusion pin 34 and an extrusion pin hole provided with an extrusion device are respectively arranged; a gap is formed between the extrusion cutting pin 34 and the extrusion cutting pin hole; the squeezing device comprises a squeezing pin 33, a squeezing piece, a squeezing column 332 and a disc spring set 333, the disc spring is arranged in a squeezing pin hole, the squeezing column, the squeezing piece and the squeezing pin are sequentially arranged on the disc spring, two ends of the squeezing pin hole are plugged by an upper plug 3341 and a lower plug 3342, the squeezing piece is horizontally arranged and positioned at the joint of the action rod 31 and the squeezing body 32, and the side surface of the squeezing piece, which is vertical to the movement direction of the action rod, is an arc surface. Specifically, the extrusion is preferably an extrusion cylinder 331. The axis of the pressing rod is perpendicular to the moving direction of the action rod 31, and the cylindrical surface of the pressing rod corresponds to the joint of the action rod and the squeezing body.
A spacer (not shown) is provided between lower seal 3342 and disc spring set 333. An annular flange is arranged at the downward section of the upper port of the extrusion pin hole part on the action rod 31, a flange is arranged on the extrusion column 332 and abuts against the lower bottom surface of the annular flange on the inner wall of the hole, and a disc spring set 333 is arranged between the extrusion column 332 and the lower plug 3342. In this way, the upward movement of the extruding column 332 is limited by the annular flange of the orifice, but the downward movement of the extruding column 332 has no rigid limit, and the upper plug 3341 is adjusted to enable the extruding column to move downward, so that the upper and lower positions of the cylindrical extruding piece 331 arranged on the extruding column are adjusted to be positioned at the gap between the extruding body and the action rod.
A boss is arranged at the inner end of the threaded section of the lower plug 3342 screwed in the extrusion pin hole and serves as an upper adjusting limit of the lower plug. This makes it easier to position the lower plug during installation. A gasket is arranged between the lower plug 3342 and the disc spring group, and the prepressing force of the disc spring group 333 is adjusted by additionally arranging gaskets with different thicknesses, so that the extrusion force is stable and reliable.
In this type of stripping device, the stripping pin has a clearance with the pin hole, which can be designed as a safety pin that can be broken by a predetermined external force, for example 28KN ± 2KN, in the event of a track strip. And the other pin is designed into an extruding and stripping pin structure, when slight external force exists, the cambered surface of the extruding and stripping piece positioned at the joint of the action rod and the extruding and stripping body can provide rolling, the pin body cannot be damaged, and the gap between the extruding and cutting pin and the pin hole is ensured to be completely free from contact and stress under the condition of slight external force. Therefore, the normal work of the squeezing and stripping device can be well ensured. If the shoe is subjected to 28KN +/-2 KN extrusion force, the shoe can be reliably separated.
The clearance between the extrusion cutting pin and the extrusion cutting pin hole is preferably 0.5 mm.
The connection structure of the action rack and the action contact group in the display mechanism can be the structure of the existing switch machine, and the invention provides a preferable connection structure as follows: as shown in fig. 15 and 16, the actuating rack 21 is connected to an intermittent actuating plate 44 through an actuating rack cylindrical protrusion 211 provided thereon, and is connected to a movable contact point set 43 in the display mechanism through the intermittent actuating plate 44.
As shown in fig. 15, 16, 17 and 18, the connecting structure between the operating rack 21 and the two movable contact groups is: the intermittent start plate 44 is arranged on a representation rod frame slide way 451 on a track for providing the sliding of the action rod assembly, namely a representation rod frame 45, and the track is provided with a fracture which divides the slide way into a representation rod frame left slide way 4511 and a representation rod frame right slide way 4512; the indication rod frame is fixedly arranged on the case. The intermittent actuator plate 44 is movably disposed on the slide 451. Two stationary contact groups are provided on the display lever frame 45: the fixed contact group a 421 and the fixed contact group b 422 are oppositely arranged as one group, and the fixed contact group c 423 and the fixed contact group d 424 are oppositely arranged as one group. The display rod frame is hinged with a left movable contact rack 4311 and a right movable contact rack 4312 through a left spline shaft 4321 and a right spline shaft 4322 of the movable contact group respectively, the two movable contact racks are fixed with the spline shafts, and movable contact group contacts are arranged on the two movable contact racks and are used for being connected with a fixed contact group. The two movable contact racks are respectively provided with a left roller 43111 and a right roller 43112 which are contacted with the intermittent start plate 44. The intermittent start plate 44 is provided with a high contact surface 445 which is in contact with the rollers of the two movable contact groups and a low contact surface 446 which is equal in length on two sides thereof, and the three contact surfaces are connected through a slope 447, so that the roller of each movable contact group is connected with one of the pair of fixed contact groups when being arranged on the high contact surface 445 and is connected with the other of the pair of fixed contact groups when being arranged on the low contact surface 446.
The connecting structure of the action rack 21 and the intermittent starting plate 44 is as follows: an intermittent starting plate long groove 442 is formed in the intermittent starting plate 44 along the moving direction of the actuating rod 31, and a cylindrical protrusion 211 fixedly arranged on the actuating rack 2 is movably arranged in the long groove 442 along the long groove; a linkage plate 441 is hinged to the intermittent starting plate 44 near two ends of the long groove respectively; when the linkage plate 441 is on the track, the linkage plate and the end of the long groove 442 are respectively located at two sides of the protrusion 211 to block the cylindrical protrusion 211 in two moving directions of the protrusion 211 in the long groove 442, so that the intermittent actuation plate 44 moves synchronously with the actuation rack 21; when the linkage plate drops into the break, the protrusion 211 can move in the slot 442 and the intermittent activation plate can no longer move.
The length of the elongated slot 442 of the actuation plate 44 may correspond to the reciprocating stroke of the actuation rack 21.
The mutual relationship among the fracture length, the length of the high contact surface 445 and the length of the low contact surface 446 is as follows: when the contact point of the movable contact point group on one side and the intermittent starting plate is from the low contact surface to the high contact surface, the contact point of the movable contact point group on the other side and the intermittent starting plate is also positioned on the high contact surface, the linkage plate can fall into the fracture to release the clamping of the protrusion, and the linkage plate on the one side is still in the fracture; when the power output piece on the driving mechanism pushes the intermittent starting plate to the end point of one side of reciprocating motion, the contact point of the movable contact point group of the other side and the intermittent starting plate is positioned on the low contact surface of the side.
In use, as shown in fig. 15, in the right latched position, i.e., the right end of travel, the right roller 43112 on the right set of moving contacts is positioned on the high contact surface 445 of the intermittent actuator plate 44, which set of moving contacts engages the set of stationary contacts d 424; at this time, the protrusion 211 is located at the right end of the long slot 442 on the intermittent start plate, and the right linkage plate 4412 is located on the slide track 451 and connects the protrusion 211 and the intermittent start plate 44 together with the right end of the long slot 442. At this time, the left roller 43111 of the left movable contact group is placed on the low contact surface 446 of the intermittent start plate 44, and the left movable contact group is engaged with the stationary contact group b 422.
During unlocking, as shown in fig. 6, the sector gear 22 starts to rotate counterclockwise, the action rack 21 starts to move leftward by a distance d1, the right end of the left groove contacts with the left locking column 351, and the left end of the right groove 31b corresponds to the right locking column 352, during the moving distance, the action rod does not move, but the action rack 21 starts to move leftward, which drives the intermittent starting plate to move leftward, and the left moving contact group first moves along the slope from the low contact surface to the high contact surface, and then contacts with the static contact group a 421, i.e., is disconnected. The distance of the intermittent starting plate moving disconnection representation is less than the length of d1, therefore, the intermittent starting plate moving disconnection representation is firstly disconnected and then unlocked, and the industrial regulation in the field is met.
Then, as shown in fig. 6, the right end of the left groove pushes the left locking post 351, and the right locking post 352 comes out of the right notch, so that the point rail can be pulled to move along with the left movement of the action rack. Meanwhile, the right linkage plate 4412 comes to the fracture of the slideway 4512 and falls, the protrusion 211 continues to move leftwards in the groove 442, the right linkage plate releases the association relationship between the protrusion 211 and the intermittent starting plate 44, and the intermittent starting plate 44 stops moving. Meanwhile, as shown in fig. 5, the action rack moves leftwards continuously, and the whole locking process is completed.
When the protrusion 211 moves to the left end of the long slot 442, the action rack 21 pushes the left locking column into the left locking notch to implement locking, and then, the intermittent starting plate is pushed to move left, and at this time, the left linkage plate 4411 comes to the slide 4511 from the fracture, so that the protrusion 211 is restrained between the left linkage plate and the left end face of the groove, and the intermittent starting plate and the protrusion are integrated. At this time, the right roller 43112 on the right movable contact group falls on the lower contact surface, the right movable contact group is changed to be jointed with the fixed contact group c 423, at this time, the protrusion comes to the left end point of the stroke and is locked by the conversion locking mechanism, and the indicated circuit after locking is also closed.
The conversion locking mechanism and the representation mechanism have a mutual relation, namely:
the distance from the low contact surface to the high contact surface corresponds to the moving distance of the action rack (21), and corresponds to the difference between the length of the groove on the action rack (21) and the diameter of the locking column, or each end point of the reciprocating stroke of the action rack (21) is a section which is a distance for enabling the action rack to move from the low contact surface to the high contact surface, and the section is a section which is longer than the end point of the corresponding side of the reciprocating stroke of the action rod component.
The distance from the low contact surface to the high contact surface, corresponding to the movement of the action rack, corresponds to the difference between the length of the groove in the action rack and the diameter of the locking column.
The distance between the two locking notches on the track is the reciprocating stroke of the action rod assembly and is also corresponding to the reciprocating stroke of the switch rail or the point rail. And the reciprocating stroke of the operating rack 21 is increased by a length beyond both end points of the reciprocating stroke of the operating rod assembly, respectively. When the action rod assembly reaches the locking notch, the roller corresponding to the movable contact point group on the intermittent starting plate is on the high-position contact surface and ready to slide down to the low-position contact surface, and when the last distance of the travel stroke of the action rack is reached, the roller slides to the low-position contact surface to be connected with an indicating signal. On the contrary, when the actuating rod assembly is to be changed from the locking state to the unlocking state, the actuating rack 21 moves a certain distance first, so that the side surface of the groove, which applies the pushing force, contacts the locking column, but the actuating rod assembly does not move, but the actuating rack 21 drives the intermittent starting plate 44 to move, so that the moving contact point group moves from the low-position contact surface to the high-position contact surface, namely, the opening is shown, and then the actuating rack 21 pushes the actuating rod assembly to start moving. Therefore, the locking-then-on indication and the unlocking-then-unlocking indication are realized, the industrial requirements that the indication is given after the unlocking and the locking are carried out after the unlocking indication and the locking are carried out in the conversion process are met, the action rod and the indicating mechanism are organically combined together, the action rod completes the unlocking-conversion-locking process, and the indicating mechanism completes the cutting-off indication-giving indication process.
The distance d or d1 (shown in fig. 4 or fig. 6) is the difference between the length of the groove on the action rack 21 and the diameter of the locking column. The length of the distance d or d1 should not be too short, otherwise the action lever may be subjected to vibration in the normal range in the locked state to unlock the lock, but the length of the distance d or d1 should not be too long, otherwise the reciprocating stroke of the action rack 21 will be too long, resulting in an increase in the overall size of the device.
The actuating rack 21 moves in the elongated slot of the intermittent actuator plate and at the same time drives an actuating rod for pulling the point rail or point rail to move by switching the locking mechanism. The process that the action rack moves and the intermittent starting plate does not move is the process that the action rod pulls the switch rail or the point rail to move. When the protrusion 211 on the action rack 21 reaches one end of the long groove of the intermittent start plate and starts to push the intermittent start plate to move, namely the corresponding action rod also reaches one end basically, the switch rail or the point rail is basically in place, then the action rod is locked through a switching locking mechanism, and then the action contact point group on the side is switched on from the high contact surface to the low contact surface of the slideway, and the switching-on indication is carried out. The end point of the reciprocating stroke of the action rack is also reached. On the contrary, the return of the action rack from the end point immediately drives the intermittent starting plate to move, so that the movable contact group at the end is from a low position to a high position contact surface, which is indicated in the disconnection state, while the movable contact group at the other end is still on the high position contact surface, which is also in the disconnection state, at the moment, the action rack continues to move, namely, the action rod is driven to pull the switch rail or the point rail to move to another position, and at the moment, the intermittent starting plate is not moved any more. Namely: the cylindrical protrusion 211 of the actuating rack 21 is inserted into the long groove of the intermittent actuating plate. When the actuating rod and the point rail or point rail are not locked, the cylindrical protrusion 211 can move in the elongated slot 442, but the intermittent actuation plate is not moved. This is different from the prior art in which the actuating plate for actuating the movable contact group moves along with the actuating member in the whole stroke.
When the roller of the movable contact group moves from the high-position contact surface to the low-position contact surface, namely the power is switched on to give an indication, the indication is required to be rapid, otherwise, the problems of arc drawing and the like of an electric contact can occur, and potential safety hazards exist if the movable contact group slides down from a slope surface. To this end, as shown in fig. 17 and 18, a speed-moving piece 443, i.e., a left speed-moving piece 4431 and a right speed-moving piece 4432, which are hinged or movably disposed on the intermittent start plate 44, are disposed on the intermittent start plate 44 beside each of the two sloping surfaces that are connected to the high-level contact surface and the low-level contact surface, and a return spring 4441 and a return spring 4442, which abut against the corresponding speed-moving piece so that a portion of the speed-moving piece protrudes out of the sloping surface to form another sloping surface parallel to the sloping surface of the original intermittent start plate, are disposed on the intermittent start plate 44 corresponding to each of the speed-moving pieces 443, and the sloping surface is steeper. The wheel width of the left and right idler wheels corresponds to the sum of the widths of the two slope surfaces, and the left and right idler wheels can be simultaneously contacted with the two slope surfaces.
Thus, when the roller falls from the high contact surface to the low contact surface, the roller can rapidly slide down from the steep slope formed by the quick moving piece, and when the roller ascends from the low contact surface to the high contact surface, the spring supported by the quick moving piece is pressed, so that the quick moving piece retracts, the roller ascends slowly along the original slope on the intermittent starting plate 44, and the blocking resistance can be reduced, so that the movement is smoother.
In order to realize the second locking of the switch with the indication rod in the locked state, the invention may further provide a locking device of the indication rod, as shown in fig. 19, in which the indication rod 41 in the indication mechanism 4 is disposed on a sliding track fixed on the indication rod frame on the frame, two notches are disposed on the indication rod 41, correspondingly, two movable contact sets 431, 432 hinged on the frame are fixed on the hinge shaft, and a contact rod 433 is fixedly connected on each hinge shaft, the two notches on the indication rod 41 and the two contact rods 433 have the position relationship: when the indicating rod reaches the end point of the reciprocating stroke, namely is in place, under the driving of the switch rail, the contact point inflection of the corresponding end is inserted into the notch of the corresponding side in a swinging mode, and is withdrawn from the notch in the next stroke starting.
A tension spring (not shown in the figure) is connected between the two movable contact sets.
The invention provides that the indication rod 41 comprises an outer indication rod 411 and an inner indication rod 412 which are mutually sleeved together, and at one end of the indication rod, a gap is arranged on the outer indication rod, so that the end head of the inner indication rod is exposed; connecting structures are arranged at the end parts of the inner and outer indication rods at the end.
The outer and inner indicating rods are both circular in cross-section.
The aforementioned notch may be provided in such a display rod, as shown in fig. 9 to 14, one side of the notch is provided in the outer display rod 411, an outer inspection tab 4111 is hinged or movably provided on the outer display rod 411, and an outer inspection tab spring 4112 is provided on the outer display rod.
On the other side of the notch, the outer indication rod 411 is provided with a through groove, the inner indication rod 412 is exposed, an inner indication rod check block 4121 is detachably and fixedly arranged on the inner indication rod 412, the notch is arranged on the inner indication rod check block, an inner check sheet 4123 is hinged or movably arranged, and an inner check sheet spring 4122 is arranged to abut against the inner check sheet.
An inspection piece 4111,4123 is hingedly or movably disposed adjacent each notch on the indicator rod 41, and an inspection piece spring 4112,4122 is disposed adjacent each notch on the indicator rod adjacent each inspection piece and has one end abutting the indicator rod and the other end abutting the corresponding inspection piece such that the inspection piece is advanced into the notch to form a notch edge sidewall that is more steeply sloped than the more steeply sloped edge sidewall of the notch.
The indication rod is provided with a notch for the contact throw fixedly connected with the spline shaft of the movable contact frame to fall into, whether the switch rail or the point rail is in place is checked, the contact throw can fall into the notch when the switch rail or the point rail is in place, if the switch rail or the point rail is not in place, the contact throw cannot fall into the notch, and the movable contact group is blocked and cannot be jointed with the corresponding static contact group to present an indication in-place signal. And the inspection sheet is provided, so that the normally-in-place contact inflection edge can quickly fall into the notch along the relatively steep edge. When the phenomenon of branch squeezing occurs, the contact in the notch is squeezed to press the edge of the notch, the check sheet abutting against the spring is squeezed back, the edge with the slower gradient of the notch is exposed, the notch can be withdrawn along the edge, and meanwhile, the movable contact group is driven to rotate to disconnect the contact, so that the indication of branch squeezing is realized.
Specifically, the notch is an inclined notch inclined at an angle to the axis of the indicating rod. The position relation between the two notches on the indicating rod and the two contact elbows and the relation between the circumferential included angles of the movable contact group and the contact elbows on the articulated shaft are as follows: when the indicating rod reaches the end point of the reciprocating stroke under the driving of the switch rail or the point rail, namely is in place, the contact throw at the corresponding end swings and is inserted into the notch at the corresponding side along with the swinging of the movable contact group, and a gap is formed between the part of the contact throw inserted into the notch and the side wall of the notch.
The structure of the indicating rod is more reasonable, the sealing is more convenient, and the strength and the rigidity of the two indicating rods can be improved. The display rod provided by the invention is in sleeve joint with two display rods in contrast to the structure of two display rods arranged side by side in the prior art, and furthermore, a sealing ring is arranged between the sleeve joint parts of the circular sections of the outer display rod and the inner display rod. And a sealing ring is arranged on the outer side wall of the circular cross section of the position, corresponding to the box wall of the switch machine box, of the outer indication rod. The display rods thus constructed are more easily sealed therebetween and to the case.
The switch machine also comprises a manual mechanism for manually driving the spline shaft in the transmission mechanism to replace a piston rack in electric drive. The device comprises a planetary gear transmission mechanism and a manual output gear lifting mechanism in the transmission mechanism.
As shown in fig. 20, the planetary gear transmission mechanism includes an input shaft 75 rotatably fixed to a frame, an eccentric shaft section provided on the input shaft 75 and parallel to the axis of the input shaft 75, an external gear 76 fixed to the eccentric shaft section, and an internal gear fixed to the frame, the external gear 76 engaging with the internal gear to form a planetary gear transmission mechanism; an output shaft 77 is rotatably arranged on the frame and is overlapped with the axis of the input shaft 75, one end of eight transmission columns 771 is uniformly and fixedly arranged on the output shaft, and the other end of the transmission columns 771 is inserted into eight holes formed in the external gear.
The lifting mechanism includes a hand output gear 79 keyed to slide axially over a splined shaft in the transmission; a lifting block 791 is fixedly arranged on the upper end surface of the lifting block, the lower end of a mandril 735 is fixedly arranged on the lifting block, a mandril sleeve 734 is arranged at the upper end of the mandril, and a roller of the mandril sleeve is arranged on a lifting slope surface track of a lifting support 731; the lifting support is connected with an action block 73, the action block is provided with a long hole, and an eccentric block 732 is arranged in the long hole; a hand crank is arranged on the frame, a radial rib and a radial groove are respectively arranged on one end face of the hand crank and the end face corresponding to the eccentric block 732, and the hand crank 741 and the eccentric block 732 are connected together through the radial rib and the radial groove.
A pipeline is arranged between two liquid inlet and outlet ports which are positioned at two sides of a piston in the double-acting oil cylinder in the hydraulic assembly, and a control valve 18 is arranged on the pipeline. Specifically, as shown in fig. 2 and 21, in the hydraulic assembly 1, the motor M14 drives the oil pump 12, the oil pump 12 is connected to the left oil cylinder 161 and the right oil cylinder 162 through two oil paths, and the two oil paths are both provided with the overflow valve 102 and connected to the oil tank 11. An oil pipe branch is arranged between two oil outlets of the oil pump and an oil path communicated with the two oil cylinders, and a stop valve 105, namely a control valve 18 in the figure 1, is arranged on the oil pipe branch.
A check valve 103 and an oil filter 104 are provided in the line. The two oil outlets are one oil inlet and one oil outlet in working, and the oil inlet and the oil outlet are relatively called oil outlets because of oil supply in two directions.
In the motor-driven mode, the valve 18 is closed and in the manual mode, the manual control valve 18 is opened to allow communication between the hydraulic cylinders on both ends of the piston 17 and zero differential pressure across the piston. Thus, the spline shaft 24 can be easily swung to manually drive the operating lever.
The input shaft 75 is connected with a hand crank inner rod 742, a hand crank outer sleeve is sleeved outside the hand crank inner rod 742, the hand crank outer sleeve is the hand crank 741, and the hand crank outer sleeve and the hand crank inner rod 742 are combined into a hand crank.
When the switch machine needs to be manually operated, firstly, the outer sleeve 741 of the hand crank is rotated to drive the eccentric block to rotate, so that the action block transversely moves to drive the lifting support to move, the roller of the ejector rod sleeve on the ejector rod rises along the lifting slope track on the lifting support, and the hand output gear axially moves on the spline shaft 24 of the transmission mechanism and is meshed with the hand input gear in the planetary gear transmission mechanism. When the roller on the ejector rod sleeve rises along a lifting slope rail on the lifting support, for example, the manual control valve is automatically opened through an automatic control device, so that the pipeline where the manual control valve is located is communicated, the oil pressure locks on two sides of the piston in the hydraulic cylinder are unlocked, and the piston can freely move in a state that the pressures at two ends of the piston are balanced; then, the inner lever 742 of the crank handle is swung to rotate the input gear 78, which rotates the output gear 79, and then drives the spline shaft 24 to rotate.
As shown in fig. 2, the oil tank 11, the oil pump 12, the valve 18 for manually operating and communicating the oil path between two oil ports of the oil cylinder, and the oil cylinder 16 in the hydraulic assembly 1 are fixedly connected into a whole, and the oil path therebetween is arranged in the oil path block. In the motor-driven mode, the valve 18 is closed, and in the manual mode, the valve 18 is opened to communicate the hydraulic cylinder with the piston 17, and the differential pressure between the two ends of the piston is zero. Thus, the spline shaft 24 can be easily swung to manually drive the operating lever.
The electro-hydraulic switch machine comprises a machine case 5, wherein the representation mechanism also comprises a sealing structure, except the two representation rods in the representation mechanism 4 are an outer representation rod 411 and an inner representation rod 412 which are sleeved together, the outer shape of the representation rod is a circular section, one end of the representation rod extends out of the box body, and the structure between the representation rod and the wall of the box body is sealed through a sealing ring.
And the motor, the oil pump, the oil tank and the hydraulic device in the hydraulic assembly are fixed into a whole and are all arranged in the machine box. This is also a measure to improve the sealing of the switch machine box. Compared with a split hydraulic station, the hydraulic station has no relation of passing through the box body, and the box body is easier to seal.
The cabinet includes a case body 51 and a case cover 52, which are sealed by a gasket. The case is also provided with case mounting claws 511.
The electro-hydraulic switch machine has the following external dimensions: the length is not more than 600 mm.
Further, the other external dimensions of the electro-hydraulic switch machine are as follows: the width is not more than 330mm, and the height is not more than 300 mm.
The length of the prior switch machine is over 700 mm. Because the switch machine provided by the invention adopts an intermittent starting plate structure, the oil cylinder is fixed, the piston is arranged in a way that the rack is connected with the gear-rack transmission mechanism, the length is 500mm, the maximum moving distance added by the transverse length of the action rod assembly is not more than 520mm, and the wall thickness of the case is added, the length of the switch machine can not exceed 600 mm.
The above dimensions, in particular the length dimension, can be such that the length of the switch machine does not exceed 600 mm; the width is not more than 330mm, and the height is not more than 300mm, so that the tongue can be arranged beside the rail or between two switch rails.
Because the switch machine provided by the invention adopts an integrated structure in a hydraulic assembly, the structure introduced by an oil pipe and the space occupied by indispensable parts in the prior art, such as a seal between a moving oil cylinder and a piston, can be saved, so that the structure is more compact, the overall dimension of the switch machine can be as small as possible in length, width and height, the length can be smaller than the space of 610mm between the existing switch rails, the width does not exceed the distance between two sleepers of a common railway, and the height can not exceed the height of a rail surface, so that the switch machine can be installed on the road center. A series of problems caused by the fact that the machine body is too large and is not easy to place in the center of the road in the prior art are solved. The switch machine provided by the invention changes the split arrangement scheme that the switch machine is arranged in the center of the road and the hydraulic station is arranged beside the road in the prior art through the hydraulic integrated design. In the prior art, such as a split type scheme, an oil pipe needs to be assembled on site, the oil injection is troublesome, air is difficult to mix in the oil injection, the air exhaust is also needed, the oil pipe is exposed, the number of joints is large, and the leakage is easy to occur, the oil pipe vibrates due to the flowing of hydraulic oil in the oil pipe, so that the leakage problem caused by friction between the oil pipe and a pipe clamp is avoided and improved, and the problem that the oil pipe is exposed and artificially damaged is solved through the improvement of the invention.