CN211053043U

CN211053043U - O-shaped ring replacing system at guide sleeve of hydraulic machine

Info

Publication number: CN211053043U
Application number: CN201922303902.3U
Authority: CN
Inventors: 陈勇
Original assignee: Chongqing Benfei Industrial Technology Service Co ltd
Current assignee: Chongqing Benfei Industrial Technology Service Co ltd
Priority date: 2019-12-19
Filing date: 2019-12-19
Publication date: 2020-07-21
Anticipated expiration: 2029-12-19

Abstract

The utility model provides a hydraulic press uide bushing department O type circle replacement system, include: the base, the sliding seat, the roof, a supporting seat, the supporting shoe, the guide bar, first intercommunication subassembly, second intercommunication subassembly, coupling assembling and jack, install four guide bars on the base, the guide bar top all is connected to the roof, the roof is connected with the hydraulic press collar, all guide bars all pass the sliding seat that is located between bottom plate and the roof, the sliding seat can move in vertical direction under the guide bar direction, install coupling assembling on the sliding seat, coupling assembling is connected with the piston rod of hydraulic press, install first intercommunication subassembly and second intercommunication subassembly on the roof, install the supporting seat on the bottom plate, can dismantle on the supporting seat and be connected with the supporting shoe, the jack is used for placing supporting piston rod on the sliding seat. The O-shaped ring replacing system at the position of the guide sleeve of the hydraulic machine solves the problem that the O-shaped ring is difficult to replace due to tightness between the guide sleeve and the inner wall of the cavity in the prior art.

Description

O-shaped ring replacing system at guide sleeve of hydraulic machine

Technical Field

The utility model relates to a hydraulic press overhauls uses equipment, concretely relates to hydraulic press uide bushing department O type circle replacement system.

Background

As shown in fig. 1, the hydraulic machine comprises: the O-shaped ring sealing device comprises a shell, a piston rod, a guide sleeve, an O-shaped ring and a pressing plate, wherein a cavity which can be communicated with the outside is formed in the shell, the piston rod extends into the cavity, the piston is arranged on the piston rod and is tightly attached to the inner wall of the cavity, the cavity is divided into a first oil cavity and a second oil cavity by the piston, the guide sleeve used for sealing the cavity is wound on the outer ring of the piston rod, the guide sleeve guides the movement of the piston rod, the O-shaped ring is arranged between the guide sleeve and the inner wall of the cavity, the pressing plate is arranged on the shell and blocks the guide sleeve in the cavity, the pressing plate is connected with the shell through a first screw, a mounting ring is formed by protruding the end part of the shell, which is far away from the pressing plate, a threaded hole is formed in the mounting ring, the O-shaped ring is easy to damage after long-term use, the phenomenon of, the operation is difficult.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a hydraulic press uide bushing department O type circle replacement system solves among the prior art because of between uide bushing and the cavity inner wall tighter lead to changing the problem of O type circle operational difficulty.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a hydraulic press uide bushing department O type circle replacement system, include: the base is provided with four guide rods, the top ends of the guide rods are connected to the top plate, the top plate is penetrated by a hydraulic press shell, the top plate is connected with a hydraulic press mounting ring, all the guide rods penetrate through a sliding seat between the bottom plate and the top plate, the sliding seat can move in the vertical direction under the guide of the guide rods, the connecting assembly is mounted on the sliding seat and connected with a piston rod of the hydraulic press, the top plate is provided with a first communicating assembly and a second communicating assembly, the first communicating assembly and the second communicating assembly are respectively used for communicating a first oil inlet pipe and a second oil inlet pipe of the hydraulic press, the bottom plate is provided with a supporting seat, the supporting seat is detachably connected with the supporting block and used for supporting the sliding seat, and the sliding seat is used for receiving a disassembled pressing plate and a guide sleeve, the jack is used for being placed on the sliding seat to support the piston rod.

Compared with the prior art, the utility model discloses following beneficial effect has:

when the hydraulic machine is disassembled, firstly, the shell of the hydraulic machine penetrates through the top plate, the shell cannot penetrate through the top plate because the mounting ring protrudes out of the shell more, the mounting ring is positioned above the top plate, and the top plate is provided with through holes for the first oil inlet and outlet pipe and the second oil inlet and outlet pipe to penetrate through specially; then, the mounting ring is connected with the top plate through a third screw, a first oil inlet and outlet pipe and a second oil inlet and outlet pipe are respectively communicated with a first oil cavity and a second oil cavity, the first oil cavity is located on one side, away from the guide sleeve, of the piston, and the second oil cavity is located between the piston and the guide sleeve; then, using the first communication assembly and the second communication assembly to pump the first oil inlet and outlet pipe and the second oil inlet and outlet pipe so as to pump oil into the first oil cavity and pump oil out of the second oil cavity, or pump oil out of the first oil cavity and pump oil into the second oil cavity; then, the sliding seat is connected with the piston rod through a connecting component; then, pumping out the oil in the first oil cavity and pumping the oil into the second oil cavity, so that the first oil cavity is free of oil, the piston rod moves to the top, and the state is kept; then, a proper supporting block is found according to the type of the hydraulic machine, so that the supporting block and the supporting seat are required to be detachably connected to adapt to the replacement of O-shaped rings on various hydraulic machine guide sleeves, the base supports the sliding seat through the supporting seat and the supporting block, the supporting block cannot be too high or too low, the jack is guaranteed to be placed into the piston rod and the sliding seat to support the piston rod, and the pressing plate and the guide sleeve can be moved after the connecting component is separated from the piston rod; then, the connecting assembly is separated from the piston rod, so that the connecting assembly deviates from the position right below the piston rod, the connecting assembly is prevented from obstructing the installation of the jack and the disassembly of the guide sleeve, and the sliding seat falls on the supporting block after falling for a short distance; then, the jack is placed on the sliding seat, and the piston rod is jacked by the jack; then, two first screws connected with the pressing plate and the shell are disassembled, the number of the first screws is at least 6, two first screw rods are screwed into the two first screw installation positions which are just disassembled, a nut is screwed on each first screw rod, and then the rest first screws are disassembled; then, the nut is rotated, so that the position of the pressing plate is slowly lowered until the pressing plate is close to the bottom end of the piston rod, and the pressing plate falls; then, moving the pressure plate to a position tightly attached to the jack, using another jack to jack the piston rod, keeping the jack to jack the piston rod all the time, and if the force for keeping the piston rod pressed above is suddenly lost due to the fact that oil is in the second oil cavity and is pressurized, the guide sleeve loses the supporting force of the pressure plate, and the piston rod, the oil in the second oil cavity and the guide sleeve are likely to move downwards together, so that the piston rod needs to be supported all the time; then, the jack in the pressing plate is taken down, so that the pressing plate is detached; then, oil is supplied to the second oil cavity, so that the guide sleeve is flushed out of the shell by oil pressure, and then the guide sleeve is slowly moved to the bottom end of the piston rod; then, taking down the O-shaped ring on the guide sleeve, and sleeving a new O-shaped ring to realize the replacement of the O-shaped ring; then, slowly lifting the guide sleeve, and pressing the guide sleeve into the shell; then, sleeving the pressing plate outside the piston rod, and slowly lifting and sleeving the pressing plate outside the shell; and then, screwing the first screw into the pressing plate and the shell to realize the installation of the pressing plate, wherein the pressing plate blocks the guide sleeve in the shell.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.

Drawings

FIG. 1 is a cross-sectional view of a hydraulic machine;

FIG. 2 is a cross-sectional view of an O-ring replacement system at a guide sleeve of a hydraulic machine;

FIG. 3 is a top view at the slide mount;

FIG. 4 is a schematic view of the cushion ring and attachment ring of FIG. 3 with the ring removed;

FIG. 5 is an enlarged view of the first communication assembly;

fig. 6 is an enlarged view at the second communicating member.

Reference numerals: the device comprises a housing 10, a piston 11, a piston rod 12, a guide sleeve 13, an O-shaped ring 14, a pressure plate 15, a base 21, a sliding seat 22, a top plate 23, a supporting seat 24, a supporting block 25, a guide rod 26, a rotating arm 27, a rotating ring 270, a first elastic piece 28, a hinge shaft 29, a suspension bracket 20, a buffer ring 30, a first communicating component 3, a communicating head 31, a hose 32, a sealing ring 33, a first spring 34, a second communicating component 4, a connecting component 5, a connecting ring 51, a supporting rod 52, a second screw 53, a supporting component 6, a driving arm 61, an arc-shaped block 62, a first extruding component 7, a second extruding component 8, a conical table 81, a second screw 82, an elastic blocking component 9, a wedge block 91, a moving rod 92, a second spring 93, a roller 94 and a mounting seat 100.

Detailed Description

In order to make the utility model realize that technical means, creation characteristics, achievement purpose and effect are clearer and easily understand, it is right to combine below the figure and the detailed implementation mode the utility model discloses do further explanation:

as shown in fig. 1 to 6, the utility model provides a hydraulic press uide bushing department O type circle replacement system, include: the hydraulic press comprises a base 21, a sliding seat 22, a top plate 23, a supporting seat 24, a supporting block 25, guide rods 26, a first communicating component 3, a second communicating component 4, a connecting component 5 and a jack (not shown in the figure), wherein four guide rods 26 are installed on the base 21, the top ends of the guide rods 26 are connected to the top plate 23, the top plate 23 is penetrated by a hydraulic press shell 10, the top plate 23 is connected with a hydraulic press mounting ring, all the guide rods 26 penetrate through the sliding seat 22 between a bottom plate and the top plate 23, the sliding seat 22 can move in the vertical direction under the guidance of the guide rods 26, the sliding seat 22 is provided with the connecting component 5, the connecting component 5 is connected with a piston rod 12 of the hydraulic press, the top plate 23 is provided with the first communicating component 3 and the second communicating component 4, the first communicating component 3 and the second communicating component 4 are respectively used for communicating a first oil inlet pipe and a second oil outlet pipe, the supporting seat 24 is detachably connected with a supporting block 25, the supporting block 25 is used for supporting the sliding seat 22, the sliding seat 22 is used for receiving the disassembled pressing plate 15 and the guide sleeve 13, and the jack is used for being placed on the sliding seat 22 to support the piston rod 12.

In order to realize the detachable connection of the supporting block 25 and the supporting seat 24 and realize the relative position positioning of the supporting block 25 and the supporting seat 24, the situation that the sliding seat 22 needs to be provided with a jack after the supporting block 25 is installed is avoided from being supported, the top surface of the supporting seat 24 is sunken to form two T-shaped installation grooves, sliding feet are arranged in each installation groove in a sliding mode, and each sliding foot is fixed with the supporting block 25.

In order to realize that the buffer ring 30 can automatically rotate to the position right below the piston rod 12 after the connecting assembly 5 is separated from the piston rod 12 so as to support the falling pressure plate 15 and the falling guide sleeve 13, the hollow arrangement of the buffer ring 30 also provides an installation position for the installation of the jack, so that the jack can be supported by the sliding seat 22 with sufficient force, a rotatable rotating ring 270 is installed on the sliding seat 22, the rotating ring 270 penetrates through and is fixedly provided with a rotating arm 27, the connecting assembly 5 is installed at one end of the rotating arm 27, the buffer ring 30 is installed at the other end of the rotating arm 27, the buffer ring 30 is used for receiving the disassembled pressure plate 15 and the guide sleeve 13, a first elastic element 28 is installed at the hinged joint of the rotating ring 270 and the sliding seat 22, and the buffer ring 30 can be kept to be positioned right below the piston rod 12 under the elastic force of.

The first elastic member 28 is a coil spring, the inner wall of the swivel ring 270 is recessed to form a mounting groove in which the coil spring is convoluted, a hinge shaft 29 for guiding the swivel ring 270 to rotate is mounted on the slide holder 22, the inner end of the coil spring is fixed to the hinge shaft 29, and the outer end of the coil spring is fixed to the inner wall of the mounting groove.

In order to design the connecting assembly 5 with a simple structure, the connecting assembly 5 includes: the connecting ring 51 is connected with the piston rod 12 through the second screws 53, the two support rods 52 are connected with the connecting ring 51, a sliding groove for the two support rods 52 to slide is formed in the sliding seat 22, the sliding groove is arranged by taking the center line of the rotating ring 270 as the center of a circle, and the connecting ring 51 is fixed with one end of the rotating arm 27. The support rod 52 cannot be separated from the sliding seat 22, the support rod 52 can only slide on the sliding seat 22, the rotating ring 270 cannot be separated from the hinge shaft 29 in the vertical direction, and the rotating ring 270 can only rotate relative to the hinge shaft 29, so that when the piston rod 12 rises, the piston rod 12 can drive the sliding seat 22 to rise through the connecting ring 51, the support rod 52 and the rotating ring 270, the support rod 52 is arranged to avoid being easily broken due to the fact that the connecting position of the rotating ring 270 and the rotating arm 27 is subjected to too large stress, and the service life is prolonged.

In order to prevent the sliding grooves for supporting the jack and the cushion ring 30 from being filled when the jack and the cushion ring 30 are used and thus the jack and the cushion ring 30 are easily damaged, and to improve the service life of the jack and the cushion ring 30, a support member 6 is connected to the rotating ring 270, the support member 6 is opposite to the cushion ring 30, and the support member 6 is used for filling the sliding grooves when the cushion ring 30 is opposite to the piston rod 12.

In order to design the support assembly 6 with a simple structure and prevent the support assembly 6 from influencing the rotation of the cushion ring 30 and the support rod 52, the support assembly 6 comprises: the buffer ring comprises a driving arm 61 and two arc-shaped blocks 62, the two arc-shaped blocks 62 are respectively arranged in the two sliding grooves, the surface of each arc-shaped block 62 and the surface of the sliding seat 22 are on the same plane, the driving arm 61 is connected with the two arc-shaped blocks 62, the two arc-shaped blocks 62 support the buffer ring 30, and the driving arm 61 is fixed with the rotating ring 270. Because the buffer ring 30, the driving arm 61 and the two arc-shaped blocks 62 are fixed relative to the rotating ring 270, the two arc-shaped blocks 62 always support the buffer ring 30, and meanwhile, the top surfaces of the arc-shaped blocks 62 and the surface of the sliding seat 22 are on the same plane, so that the contact position of the arc-shaped blocks 62 and the sliding seat 22 is ensured to be free of steps.

In order to improve the maintenance efficiency, two hydraulic machines are simultaneously arranged on the top plate 23, the two hydraulic machines are arranged on the top plate 23 in a mirror symmetry mode, and the first oil inlet and outlet pipe and the second oil inlet and outlet pipe are located between the two hydraulic machine shells 10.

In order to realize the simultaneous communication of the first oil inlet and outlet pipes of the two hydraulic machines and improve the installation efficiency, a first extrusion assembly 7 is installed between the two first oil inlet and outlet pipes, the first extrusion assembly 7 acts on the two first communication assemblies 3, the first extrusion assembly 7 is used for respectively pressing the two first communication assemblies 3 onto the two first oil inlet and outlet pipes, a second elastic piece is arranged in the first communication assembly 3, and the second elastic piece can keep the first communication assemblies 3 away from the corresponding first oil inlet and outlet pipes.

In order to realize simultaneous communication between the second oil inlet and outlet pipes of the two hydraulic machines and further improve the installation efficiency, a second extrusion assembly 8 is installed between the two second oil inlet and outlet pipes, the second extrusion assembly 8 acts with the two second communication assemblies, the second extrusion assembly 8 is used for respectively pressing the two second communication assemblies 4 onto the two second oil inlet and outlet pipes, a third elastic part is arranged in the second communication assembly 4, and the third elastic part can keep the second communication assembly 4 away from the corresponding second oil inlet and outlet pipe.

In order to avoid being obstructed due to excessive oil when the guide sleeve 13 is pressed into the shell 10, the difficulty of pressing the guide sleeve 13 into the shell 10 is reduced, each second communication component 4 is connected with a mounting seat 100, each mounting seat 100 is provided with an elastic obstructing component 9, the elastic obstructing components 9 do not obstruct the separation of the pressure plate 15 and the guide sleeve 13 from the shell 10, and the elastic obstructing components 9 are used for limiting the approach of the guide sleeve 13 and the pressure plate 15 to the shell 10 when the second communication components 4 communicate the second oil inlet and outlet pipes. The elastic blocking component 9 realizes that the guide sleeve 13 can be close to the shell 10 after the second oil inlet and outlet pipe is opened, so that the misoperation that the guide sleeve 13 is close to the shell 10 without disconnecting the second oil inlet and outlet pipe is avoided, and the design of the elastic blocking component 9 prompts that the second oil inlet and outlet pipe is disconnected.

Each of the first communicating component 3 and the second communicating component 4 includes a communicating head 31, a hose 3211, a sealing ring 33, and a first spring 34, where the first spring 34 is a second elastic member, one end of the communicating head 31 is used to press against the first oil inlet/outlet pipe or the second oil inlet/outlet pipe, a step for pressing an end surface of the first oil inlet/outlet pipe or the second oil inlet/outlet pipe is formed on an inner wall of the communicating head 31, the sealing ring 33 is installed on the step, the sealing ring 33 is tightly attached to an end surface of the first oil inlet/outlet pipe or the second oil inlet/outlet pipe, the communicating head 31 is L-shaped, the communicating head 31 can slide relative to the top plate 23, the other end of the communicating head 31 is communicated to one end of the hose 3211, the hose 3211 allows the communicating head 31 to slide relative to the top plate 23, the other end of the hose 3211 is communicated to the oil pump, one end of the first spring 34 is fixed relative to the communicating head 31, the other end of.

The second communicating member 4 is mounted on the suspension bracket 20, and the suspension bracket 20 is fixed on the top plate 23.

The first pressing assembly 7 and the second pressing assembly 8 each include: the circular truncated cone 81 is used for extruding the communication heads 31 of the two first communication assemblies 3 or the two second communication assemblies 4, the large end of the circular truncated cone 81 is connected with the second screw 82, and the second screw 82 is in threaded connection with the top plate 23 or the suspension frame 20.

The screw of the second extrusion assembly 8 is located in the horizontal direction, the mounting seat 100 is fixed with the communicating head 31 of the second communicating assembly 4, and the mounting seat 100 can move in the direction parallel to the radial direction of the piston rod 12 under the driving of the communicating head 31.

The elastic barrier assembly 9 comprises: the suspension device comprises a wedge block 91, a moving rod 92, a second spring 93 and at least three rollers 94, wherein the moving rod 92 penetrates through an installation seat 100, the moving direction of the moving rod 92 relative to the installation seat 100 is parallel to the moving direction of a communication head 31 relative to a suspension frame 20, one end of the moving rod 92 is fixed to the large end of the wedge block 91, the wedge block 91 is provided with an inclined surface facing a shell 10, the at least three rollers 94 are installed on the wedge block 91, the rollers 94 protrude out of the inclined surface, the rollers 94 can rotate, the rollers 94 are used for being in contact with a pressure plate 15 and a guide sleeve 13, the second spring 93 is a third elastic piece, one end of the second spring 93 is fixed relative to the installation seat 100, and the other end.

When the guide sleeve 13 or the pressing plate 15 is moved away from the housing 10, the guide sleeve 13 or the pressing plate 15 comes into contact with the roller 94 on the inclined surface, the guide sleeve 13 or the pressing plate 15 presses the wedge 91 toward the mounting seat 100 by the roller 94, and the wedge 91 can be slowly pressed toward the mounting seat 100 due to the inclination of the inclined surface, thereby allowing the guide sleeve 13 or the pressing plate 15 to pass over the wedge 91. When the guide sleeve 13 is pressed into the shell 10, the guide sleeve 13 is in contact with the non-inclined surface of the wedge block 91, the wedge block 91 cannot be slowly close to the mounting seat 100, the wedge block 91 cannot allow the guide sleeve 13 to pass through, and at the moment, only the second screw 82 of the second extrusion assembly 8 is rotated, so that the communication head 31 drives the mounting seat 100 and the wedge block 91 to be away from the center line of the piston rod 12 under the elastic force of the first spring 34, the wedge block 91 is deviated from the lifting movement space of the guide sleeve 13 and the pressure plate 15, the guide sleeve 13 can be mounted back only after the second oil inlet and outlet pipe is opened, and the difficulty that the guide sleeve 13 is pressed into the shell 10 is reduced.

Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.

Claims

1. The utility model provides a hydraulic press uide bushing department O type circle replacement system which characterized in that includes: the base is provided with four guide rods, the top ends of the guide rods are connected to the top plate, the top plate is penetrated by a hydraulic press shell, the top plate is connected with a hydraulic press mounting ring, all the guide rods penetrate through a sliding seat between the bottom plate and the top plate, the sliding seat can move in the vertical direction under the guide of the guide rods, the connecting assembly is mounted on the sliding seat and connected with a piston rod of the hydraulic press, the top plate is provided with a first communicating assembly and a second communicating assembly, the first communicating assembly and the second communicating assembly are respectively used for communicating a first oil inlet pipe and a second oil inlet pipe of the hydraulic press, the bottom plate is provided with a supporting seat, the supporting seat is detachably connected with the supporting block and used for supporting the sliding seat, and the sliding seat is used for receiving a disassembled pressing plate and a guide sleeve, the jack is used for being placed on the sliding seat to support the piston rod.

2. The system for replacing the O-shaped ring at the guide sleeve of the hydraulic machine as claimed in claim 1, wherein the top surface of the support seat is recessed to form two T-shaped mounting grooves, each mounting groove is provided with a sliding foot in a sliding manner, and each sliding foot is fixed with a support block.

3. The O-ring replacing system at the guide sleeve of the hydraulic machine is characterized in that a rotatable rotating ring is mounted on a sliding seat, a rotating arm penetrates through the rotating ring and is fixed with the rotating arm, a connecting assembly is mounted at one end of the rotating arm, a buffer ring is mounted at the other end of the rotating arm and is used for receiving the disassembled pressure plate and the guide sleeve, and a first elastic member is mounted at the hinged position of the rotating ring and the sliding seat and can keep the buffer ring right below a piston rod under the elastic force of the first elastic member.

4. The O-ring replacement system at a guide sleeve of a hydraulic machine as claimed in claim 3 wherein the connection assembly comprises: the connecting ring is connected with the piston rod through the second screws, the connecting ring is connected with the two supporting rods, sliding grooves for the two supporting rods to slide are formed in the sliding seat, and the sliding grooves are formed in the center line of the rotating ring.

5. The O-ring replacement system at the guide sleeve of the hydraulic machine as recited in claim 4, wherein a support assembly is connected to the rotating ring, the support assembly facing the cushion ring, the support assembly being configured to fill the chute when the cushion ring faces the piston rod.

6. The O-ring replacement system at a guide sleeve of a hydraulic machine as recited in claim 5, wherein the support assembly comprises: the driving arm and the two arc-shaped blocks are respectively arranged in the two sliding grooves, the surface of each arc-shaped block and the surface of the sliding seat are on the same plane, the driving arm is connected with the two arc-shaped blocks, the two arc-shaped blocks support the buffer ring, and the driving arm is fixed with the rotating ring.

7. The system for replacing an O-ring at a guide sleeve of a hydraulic machine as claimed in claim 1, wherein the two hydraulic machines are mounted on the top plate in mirror symmetry, and the first oil inlet and outlet pipe and the second oil inlet and outlet pipe are both located between the two hydraulic machine housings.

8. The system for replacing the O-shaped ring at the guide sleeve of the hydraulic machine as claimed in claim 7, wherein a first extrusion assembly is installed between the two first oil inlet and outlet pipes and acts with the two first communication assemblies, the first extrusion assembly is used for pressing the two first communication assemblies onto the two first oil inlet and outlet pipes respectively, and a second elastic member is arranged in the first communication assembly and can keep the first communication assemblies away from the corresponding first oil inlet and outlet pipes.

9. The system for replacing the O-shaped ring at the guide sleeve of the hydraulic machine as claimed in claim 7, wherein a second extrusion assembly is installed between the two second oil inlet and outlet pipes, the second extrusion assembly is used for acting with the two second through assemblies, the second extrusion assembly is used for respectively pressing the two second communication assemblies onto the two second oil inlet and outlet pipes, a third elastic member is arranged in the second communication assembly, and the third elastic member can keep the second communication assemblies away from the corresponding second oil inlet and outlet pipes.

10. The O-ring replacement system at the guide sleeve of the hydraulic machine as recited in claim 9, wherein each second communication assembly is connected with a mounting seat, each mounting seat is provided with an elastic blocking assembly, the elastic blocking assembly does not block the pressure plate and the guide sleeve from being separated from the housing, and the elastic blocking assembly is used for limiting the guide sleeve and the pressure plate to be close to the housing when the second communication assembly communicates the second oil inlet and outlet pipe.