Rapid clamping device for machining automatic gear shifting valve body
By designing a simple clamping mechanism in the automatic shift valve body machine, using positioning, support, limiting and compression structures, the problem of high parallelism accuracy requirements during assembly is solved, and more efficient clamping and disassembly is achieved , ensuring the parallelism and clamping stability of the shift valve body.
Patent Information
- Application Number
- CN202421014739.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-10
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2034-05-10
AI Technical Summary
During the assembly process of existing automatic shift valve body machines, the parallelism accuracy between the installation boss, step surface and the valve body sleeve end surface is high, but the clamping device is designed in complex, and it is inconvenient to disassemble and assemble, making it difficult to ensure accuracy and efficiency.
A quick clamping device including a first clamping mechanism and a second clamping mechanism is designed. Through a positioning seat, a support structure, a limiting structure and a compression structure, a cylinder drives the pull rod and the compression plate to achieve shifting. The simple and precise clamping and disassembly of the valve body ensures parallelism between the mounting boss, step surface and the end surface of the valve body sleeve.
The clamping mechanism structure is simplified, the clamping efficiency and accuracy are improved, the workers are convenient to operate, the parallelism requirements of the shift valve body is ensured, and the clamping stability and reliability are enhanced through multi-point support and limit structure.
Smart Images

Figure CN222221871U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of machining a shift valve body, in particular to a quick clamping device for machining an automatic shift valve body. Background Art
[0002] The shift valve body, as a mounting support component, is one of the most important assembly components of the shift valve. Figure 1 , 2 The figure shows an automatic shift valve body, comprising an outer valve body sleeve 1 with an overall cylindrical design, one end of the valve body sleeve is integrally formed with a valve body bottom plate 2 with a ring structure design, an inner edge of the valve body bottom plate is integrally formed with a mounting sleeve 3, the distal end of the mounting sleeve is bent inwardly and extended to form a ring-shaped connecting portion 4, a mounting cylinder 5 with an overall cylindrical structure design is connected to the connecting portion, one end of the mounting cylinder extends outwardly to the outside of the end face of the connecting portion, one end of the mounting cylinder is integrally designed with a stepped shaft structure and forms a stepped surface 6; three mounting bosses 7 are evenly arranged on the valve body bottom plate and along the circumferential direction, a positioning hole 8 formed by inward drawing is also provided on the surface of the valve body bottom plate, and four positioning grooves arranged along the axial direction of the positioning hole are evenly arranged on the inner circumferential wall of the positioning hole; a plurality of reinforcing ribs 9 are evenly arranged along the circumferential direction between the inner circumferential wall of the valve body sleeve and the outer circumferential wall of the mounting sleeve, and a reinforcing column 10 is integrally formed in the middle of the reinforcing ribs; and reinforcing ribs 11 are also provided between the connecting portion and the mounting sleeve.
[0003] When assembling the automatic shift valve body, the mounting boss, stepped surface and valve body sleeve end face are all used as mounting matching references, which requires very high parallelism accuracy among the three. Utility Model Content
[0004] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the utility model is how to design an automatic shift valve body machine with a quick clamping device that has a simpler and more reasonable structure, can better ensure the parallelism accuracy requirements of the mounting boss, step surface and valve body sleeve end face on the shift valve body, and is more convenient for disassembly and assembly.
[0005] To achieve the above-mentioned objectives, the utility model provides a quick clamping device for an automatic shift valve body machine, including a base plate, on which a first clamping mechanism is provided; it is characterized in that: the first clamping mechanism includes a first positioning seat, and the first positioning seat can extend into the interior of a mounting tube that is matched to the shift valve body; it also includes a first supporting structure and a first supporting surface of the first supporting structure is supported on the lower end surface of the mounting boss on the shift valve body; it also includes a first limiting structure and a limiting end of the first limiting structure can extend into the positioning hole on the shift valve body to limit the rotation of the shift valve body; it also includes a first clamping structure, and the first clamping structure includes a first telescopic mechanism arranged under the base plate, the working end of the first telescopic mechanism is connected to a first pull rod, the first pull rod is arranged through a first guide hole of the first positioning seat, and a first clamping plate is arranged at the upper end of the first pull rod, the first telescopic mechanism can drive the first pull rod and can drive the first clamping plate to clamp the upper end surface of the mounting tube arranged on the shift valve.
[0006] In this way, in the above-mentioned automatic shift valve body machining quick clamping device, the shift valve body can be clamped by the first clamping mechanism, and after clamping, the mounting boss is used as the clamping reference, and the stepped surface and the valve body sleeve end surface can be machined. In the entire first clamping mechanism, the positioning, supporting, anti-rotation and pressing parts are more simply designed, which can make it more convenient for workers to complete the clamping and disassembly after processing.
[0007] As an optimization, the first positioning seat includes a first set of plates installed on the base plate and designed in an annular structure, a first core seat is installed above the first set of plates, and the first guide hole is arranged in the middle of the first core seat; the first core seat includes a first core seat rod inserted and fitted in the first set of plates at the lower end, and also includes a first support platform in the middle and integrally formed at the upper end of the first core seat rod, a first positioning block is integrally formed above the first support platform, and the four corner positions of the first positioning block are respectively provided with a chamfered structure.
[0008] In this way, the structural design of the first positioning seat is simpler and more reasonable, and the first pull rod can also be guided, so the design is more reasonable.
[0009] As an optimization, the first telescopic mechanism includes a first driving cylinder installed and arranged under the base plate, and the cylinder body of the first driving cylinder is fixed under the base plate by connecting screws; the piston rod end of the first driving cylinder is connected to the lower end of the first pull rod.
[0010] In this way, the cylinder is used to provide the pulling force to the first pull rod, the structural design is simpler and the layout is more convenient.
[0011] As an optimization, the first pressure plate is designed to have a circular structure, and a U-shaped mating opening with an open side is provided on the first pressure plate. The upper end of the first pull rod has an annular mating groove, and the length segment corresponding to the mating groove at the upper end of the first pull rod can be correspondingly arranged in the U-shaped mating opening of the first pressure plate.
[0012] In this way, the first pressing plate and the first pull rod can be assembled and disassembled more conveniently, and the clamping can be completed more conveniently and quickly, thereby improving the clamping efficiency.
[0013] As an optimization, the first support structure includes first support columns respectively arranged corresponding to the lower end faces of the mounting bosses on the shift valve body, and the upper end faces of the first support columns respectively form first support surfaces and respectively correspondingly abut against and support the lower end faces of the mounting bosses on the shift valve body.
[0014] In this way, the first support column is used to abut and support the lower end surface of the mounting boss on the shift valve body, so that the support is more uniform.
[0015] As an optimization, the first limiting structure includes a limiting column arranged corresponding to the positioning hole on the shift valve body, and the upper end of the limiting column can extend into the positioning hole on the shift valve body.
[0016] In this way, the limiting column is extended into the positioning hole to limit the rotation of the shift valve body, the structural design is simpler, and the clamping is more convenient.
[0017] As an optimization, a second clamping mechanism is also provided on the base plate; the second clamping mechanism includes a second positioning seat, and the second positioning seat can extend into the interior of the mounting tube that cooperates with the shift valve body; it also includes a second supporting structure, and the second supporting structure has an inner supporting surface and an outer supporting surface, each of which corresponds to the support on the step surface and the end surface of the valve body sleeve on the shift valve body; it also includes a second limiting structure, and the limiting groove of the first limiting structure can be inserted into the reinforcing rib plate on the shift valve body; it also includes a second clamping structure, and the second clamping structure includes a second telescopic mechanism arranged under the base plate, and the working end of the second telescopic mechanism is connected to a second pull rod, and the second pull rod is arranged through a second guide hole of the second positioning seat, and a second clamping plate is arranged at the upper end of the second pull rod, and the second telescopic mechanism can drive the second pull rod and can drive the second clamping plate to clamp on the upper end surface of the mounting tube on the shift valve.
[0018] In this way, after the first clamping mechanism clamps the shift valve body, the mounting boss is used as the clamping reference, and the stepped surface and the valve body sleeve end face can be machined. The machined shift valve body is then clamped on the second clamping mechanism, clamped with the stepped surface and the valve body sleeve end face as the reference, and the mounting boss is further machined, which can better ensure the parallelism accuracy requirements of the mounting boss, the stepped surface and the valve body sleeve end face on the shift valve body.
[0019] As an optimization, the second clamping structure also includes two clamping cylinders arranged in pairs on the bottom plate, and the working end of the clamping cylinder is hingedly provided with a pressure rod with a Z-shaped structure design, and the cylinder body of the clamping cylinder is also hingedly provided with a hinged rod, and the upper end of the hinged rod is hingedly connected to the pressure rod, and after the clamping cylinder pushes the pressure rod upward, the inner end of the pressure rod can be crimped onto the valve body bottom plate on the shift valve body.
[0020] In this way, two clamping cylinders are provided to drive the pressure rod to clamp the shift valve body, making the entire clamping more reliable.
[0021] As an optimization, the second positioning seat includes a second set of plates installed on the base plate and designed in an annular structure, a second core seat is installed above the second set of plates, and the second guide hole is arranged in the middle of the second core seat; the second core seat includes a second core seat rod inserted and fitted in the second set of plates at the lower end, and also includes a second positioning block at the upper end and integrally formed at the upper end of the first core seat rod, and the four corner positions of the second positioning block are respectively provided with a chamfered structure.
[0022] In this way, the structural design of the second positioning seat is simpler, and the second pull rod can be better guided.
[0023] As an optimization, the second support structure includes an inner support rod arranged corresponding to the stepped surface on the shift valve body, the inner support rod is a plurality of the inner support rods evenly distributed in the circumferential direction, and the upper end surface of the inner support rod forms the inner support surface; and also includes an outer support rod arranged corresponding to the end surface of the valve body sleeve on the shift valve body, the outer support rod is a plurality of the outer support rods evenly distributed in the circumferential direction, and the upper end surface of the outer support rod forms the outer support surface.
[0024] In this way, by providing the inner support rod and the outer support rod, the shift valve body can be better supported and more stable and reliable.
[0025] Furthermore, the second limiting structure includes a limiting block arranged corresponding to one of the reinforcing ribs on the shift valve body, and the limiting groove is arranged at the upper end of the limiting block.
[0026] In this way, the design of the second limiting structure is simpler and more reasonable. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 It is a structural schematic diagram of the shift valve body in a specific implementation manner of the utility model.
[0028] Figure 2 yes Figure 1 Schematic diagram of the structure after rotation by an angle.
[0029] Figure 3 It is a structural schematic diagram of an automatic shift valve body machine with a quick clamping device in a specific implementation manner of the utility model.
[0030] Figure 4 yes Figure 3 Schematic top view of .
[0031] Figure 5 yes Figure 4 AA cross-sectional view of .
[0032] Figure 6 yes Figure 4 BB cross-sectional view.
[0033] Figure 7 yes Figure 3 Schematic diagram of the structure after rotation by an angle.
[0034] Figure 8 yes Figure 3 The schematic diagram of the structure after the shift valve body is omitted.
[0035] Fig. 9 yes Figure 8 Schematic top view of . DETAILED DESCRIPTION
[0036] The present invention is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific manner, and therefore cannot be understood as a limitation on the present invention. The terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.
[0037] like Figures 1 to 9 The invention discloses a quick clamping device for an automatic shift valve body machine, comprising a base plate 20, on which a first clamping mechanism is provided; the first clamping mechanism comprises a first positioning seat 21, which can extend into the interior of a mounting tube matched to the shift valve body 22; the invention also comprises a first supporting structure, so that a first supporting surface of the first supporting structure abuts against the lower end surface of the mounting boss on the shift valve body; the invention also comprises a first limiting structure, so that a limiting end of the first limiting structure can extend into the positioning hole on the shift valve body to limit the rotation of the shift valve body; the invention also comprises a first clamping structure, the first clamping structure comprises a first telescopic mechanism arranged below the base plate, a working end of the first telescopic mechanism is connected to a first pull rod 23, the first pull rod is arranged through a first guide hole of the first positioning seat, and a first clamping plate 24 is arranged at the upper end of the first pull rod, the first telescopic mechanism can drive the first pull rod and can drive the first clamping plate to clamp on the upper end surface of the mounting tube on the shift valve.
[0038] In this way, in the above-mentioned automatic shift valve body machining quick clamping device, the shift valve body can be clamped by the first clamping mechanism, and after clamping, the mounting boss is used as the clamping reference, and the stepped surface and the valve body sleeve end surface can be machined. In the entire first clamping mechanism, the positioning, supporting, anti-rotation and pressing parts are more simply designed, which can make it more convenient for workers to complete the clamping and disassembly after processing.
[0039] In this specific embodiment, the first positioning seat includes a first set plate 25 installed on the bottom plate and designed in an annular structure, a first core seat 26 is installed above the first set plate, and the first guide hole is provided in the middle of the first core seat; the first core seat includes a first core seat rod 27 inserted and fitted in the first set plate at the lower end, and also includes a first support platform 28 in the middle and integrally formed at the upper end of the first core seat rod, a first positioning block 29 is integrally formed above the first support platform, and the four corner positions of the first positioning block are respectively provided with a chamfered structure.
[0040] In this way, the structural design of the first positioning seat is simpler and more reasonable, and the first pull rod can also be guided, so the design is more reasonable.
[0041] In this specific embodiment, the first telescopic mechanism includes a first driving cylinder 30 installed and arranged below the base plate, and the cylinder body of the first driving cylinder is fixed below the base plate by connecting screws; the piston rod end of the first driving cylinder is connected to the lower end of the first pull rod.
[0042] In this way, the cylinder is used to provide the pulling force to the first pull rod, the structural design is simpler and the layout is more convenient.
[0043] In this specific embodiment, the first pressure plate is designed as a circular structure, and a U-shaped matching opening 31 with an open design on one side is provided on the first pressure plate. The upper end of the first pull rod has an annular matching groove, and the length section corresponding to the matching groove at the upper end of the first pull rod can be correspondingly matched in the U-shaped matching opening of the first pressure plate.
[0044] In this way, the first pressing plate and the first pull rod can be assembled and disassembled more conveniently, and the clamping can be completed more conveniently and quickly, thereby improving the clamping efficiency.
[0045] In this specific embodiment, the first support structure includes first support columns 32 respectively arranged corresponding to the lower end surfaces of the mounting bosses on the shift valve body, and the upper end surfaces of the first support columns respectively form first support surfaces and respectively abut and support on the lower end surfaces of the mounting bosses on the shift valve body.
[0046] In this way, the first support column is used to abut and support the lower end surface of the mounting boss on the shift valve body, so that the support is more uniform.
[0047] In this specific implementation, the first limiting structure includes a limiting column 33 arranged corresponding to the positioning hole on the shift valve body, and the upper end of the limiting column can extend into the positioning hole on the shift valve body.
[0048] In this way, the limiting column is extended into the positioning hole to limit the rotation of the shift valve body, the structural design is simpler, and the clamping is more convenient.
[0049] In this specific embodiment, a second clamping mechanism is also provided on the bottom plate; the second clamping mechanism includes a second positioning seat 34, and the second positioning seat can extend into the interior of the mounting tube that cooperates with the shift valve body; it also includes a second supporting structure, and the second supporting structure has an inner supporting surface and an outer supporting surface, each of which corresponds to the support on the step surface and the end surface of the valve body sleeve on the shift valve body; it also includes a second limiting structure, and the limiting groove of the first limiting structure can be inserted into the reinforcing rib plate on the shift valve body; it also includes a second clamping structure, and the second clamping structure includes a second telescopic mechanism arranged under the bottom plate, and the working end of the second telescopic mechanism is connected to a second pull rod 35, and the second pull rod is arranged through the second guide hole of the second positioning seat, and a second clamping plate 36 is arranged on the upper end of the second pull rod, and the second telescopic mechanism can drive the second pull rod and can drive the second clamping plate to clamp on the upper end surface of the mounting tube on the shift valve.
[0050] In this way, after the first clamping mechanism clamps the shift valve body, the mounting boss is used as the clamping reference, and the stepped surface and the valve body sleeve end face can be machined. The machined shift valve body is then clamped on the second clamping mechanism, clamped with the stepped surface and the valve body sleeve end face as the reference, and the mounting boss is further machined, which can better ensure the parallelism accuracy requirements of the mounting boss, the stepped surface and the valve body sleeve end face on the shift valve body.
[0051] In this specific embodiment, the second clamping structure also includes two clamping cylinders 37 arranged in pairs on the bottom plate, and the working end of the clamping cylinder is hingedly provided with a pressure rod 38 with a Z-shaped structure design, and the cylinder body of the clamping cylinder is also hingedly provided with a hinged rod 39, and the upper end of the hinged rod is hingedly connected to the pressure rod, and after the clamping cylinder pushes the pressure rod upward, the inner end of the pressure rod can be crimped onto the valve body bottom plate on the shift valve body.
[0052] In this way, two clamping cylinders are provided to drive the pressure rod to clamp the shift valve body, making the entire clamping more reliable.
[0053] In this specific embodiment, the second positioning seat includes a second set plate 40 installed on the base plate and designed in an annular structure, a second core seat 41 is installed above the second set plate, and the second guide hole is provided in the middle of the second core seat; the second core seat includes a second core seat rod 42 inserted and fitted in the second set plate at the lower end, and also includes a second positioning block 43 at the upper end and integrally formed on the upper end of the first core seat rod, and the four corner positions of the second positioning block are respectively provided with a chamfered structure.
[0054] In this way, the structural design of the second positioning seat is simpler, and the second pull rod can be better guided.
[0055] In this specific embodiment, the second support structure includes an inner support rod 44 arranged corresponding to the stepped surface on the shift valve body, the inner support rod is a plurality of evenly distributed along the circumferential direction, and the upper end surface of the inner support rod forms the inner support surface; and also includes an outer support rod 45 arranged corresponding to the end surface of the valve body sleeve on the shift valve body, the outer support rod is a plurality of evenly distributed along the circumferential direction, and the upper end surface of the outer support rod forms the outer support surface.
[0056] In this way, by providing the inner support rod and the outer support rod, the shift valve body can be better supported and more stable and reliable.
[0057] Furthermore, the second limiting structure includes a limiting block 46 arranged corresponding to one of the reinforcing ribs on the shift valve body, and the limiting groove is arranged at the upper end of the limiting block.
[0058] In this way, the design of the second limiting structure is simpler and more reasonable.
[0059] In summary, the above-mentioned automatic shift valve body machine with quick clamping device has a simpler and more reasonable structure, can better ensure the parallelism accuracy requirements of the mounting boss, step surface and valve body sleeve end face on the shift valve body, and is more convenient for disassembly and assembly.
[0060] The preferred specific embodiments of the utility model are described in detail above. It should be understood that ordinary technicians in this field can make many modifications and changes based on the concept of the utility model without creative work. Therefore, all technical solutions that can be obtained by technicians in this technical field based on the concept of the utility model through logical analysis, reasoning or limited experiments on the basis of the existing technology should be within the scope of protection determined by the claims.
Claims
1. A quick clamping device for an automatic shift valve body machine, comprising a base plate, on which a first clamping mechanism is provided; characterized in that ; The first clamping mechanism includes a first positioning seat, which can extend into the interior of a mounting tube that cooperates with the shift valve body; it also includes a first supporting structure so that the first supporting surface of the first supporting structure abuts against the lower end surface of the mounting boss on the shift valve body; it also includes a first limiting structure so that the limiting end of the first limiting structure can extend into the positioning hole on the shift valve body to limit the rotation of the shift valve body; it also includes a first clamping structure, the first clamping structure includes a first telescopic mechanism arranged under the bottom plate, the working end of the first telescopic mechanism is connected to the first pull rod, the first pull rod is arranged through the first guide hole of the first positioning seat, and a first clamping plate is arranged at the upper end of the first pull rod, the first telescopic mechanism can drive the first pull rod and can drive the first clamping plate to clamp on the upper end surface of the mounting tube on the shift valve.
2. A quick clamping device for an automatic shift valve body machine as claimed in claim 1, characterized in that: The first positioning seat includes a first set of plates installed on the bottom plate and designed in an annular structure, a first core seat is installed above the first set of plates, and the first guide hole is arranged in the middle of the first core seat; the first core seat includes a first core seat rod inserted and fitted in the first set of plates at the lower end, and also includes a first support platform in the middle and integrally formed at the upper end of the first core seat rod, a first positioning block is integrally formed above the first support platform, and the four corner positions of the first positioning block are respectively provided with a chamfered structure.
3. A quick clamping device for an automatic shift valve body machine as claimed in claim 2, characterized in that: The first telescopic mechanism comprises a first driving cylinder installed and arranged below the base plate, the cylinder body of the first driving cylinder is fixed below the base plate by connecting screws; the piston rod end of the first driving cylinder is connected to the lower end of the first pull rod.
4. A quick clamping device for an automatic shift valve body machine as claimed in claim 1, characterized in that: The first pressure plate is designed in a circular structure, and is provided with a U-shaped fitting opening with one side open. The upper end of the first pull rod has an annular fitting groove, and the length section corresponding to the fitting groove at the upper end of the first pull rod can be correspondingly fitted in the U-shaped fitting opening of the first pressure plate.
5. The quick clamping device for automatic shift valve body machine according to claim 1, characterized in that: The first support structure includes first support columns respectively arranged corresponding to the lower end surface of the mounting boss on the shift valve body, and the upper end surfaces of the first support columns respectively form first support surfaces and respectively abut and support on the lower end surface of the mounting boss on the shift valve body.
6. A quick clamping device for an automatic shift valve body machine as claimed in claim 1, characterized in that: The first limiting structure includes a limiting column arranged corresponding to the positioning hole on the shift valve body, and the upper end of the limiting column can extend into the positioning hole on the shift valve body.
7. A quick clamping device for an automatic shift valve body machine as claimed in claim 1, characterized in that: A second clamping mechanism is also provided on the bottom plate; the second clamping mechanism includes a second positioning seat, and the second positioning seat can extend into the interior of the mounting tube that cooperates with the shift valve body; it also includes a second supporting structure, and the second supporting structure has an inner supporting surface and an outer supporting surface, each of which corresponds to the support on the step surface and the end surface of the valve body sleeve on the shift valve body; it also includes a second limiting structure, and the limiting groove of the first limiting structure can be inserted into the reinforcing rib plate on the shift valve body; it also includes a second clamping structure, and the second clamping structure includes a second telescopic mechanism arranged under the bottom plate, the working end of the second telescopic mechanism is connected to a second pull rod, the second pull rod is arranged through a second guide hole of the second positioning seat, and a second clamping plate is arranged at the upper end of the second pull rod, and the second telescopic mechanism can drive the second pull rod and can drive the second clamping plate to clamp on the upper end surface of the mounting tube on the shift valve.
8. A quick clamping device for an automatic shift valve body machine as claimed in claim 7, characterized in that: The second clamping structure also includes two clamping cylinders arranged in pairs on the bottom plate, and the working end of the clamping cylinder is hingedly provided with a pressure rod with a Z-shaped structure design, and the cylinder body of the clamping cylinder is also hingedly provided with a hinged rod, and the upper end of the hinged rod is hingedly connected to the pressure rod, and after the clamping cylinder pushes the pressure rod upward, the inner end of the pressure rod can be crimped onto the valve body bottom plate on the shift valve body.
9. A quick clamping device for an automatic shift valve body machine as claimed in claim 7, characterized in that: The second positioning seat includes a second set of plates installed on the base plate and designed in an annular structure, a second core seat is installed above the second set of plates, and the second guide hole is arranged in the middle of the second core seat; the second core seat includes a second core seat rod inserted and fitted in the second set of plates at the lower end, and also includes a second positioning block at the upper end and integrally formed on the upper end of the first core seat rod, and the four corner positions of the second positioning block are respectively provided with a chamfered structure.
10. A quick clamping device for an automatic shift valve body machine as claimed in claim 7, characterized in that: The second supporting structure includes an inner support rod arranged corresponding to the stepped surface on the shift valve body, the inner support rods are multiple and evenly distributed along the circumferential direction, and the upper end surface of the inner support rod forms the inner supporting surface; and also includes an outer support rod arranged corresponding to the end surface of the valve body sleeve on the shift valve body, the outer support rods are multiple and evenly distributed along the circumferential direction, and the upper end surface of the outer support rod forms the outer supporting surface.
