Detachable piston push rod for clutch

Abstract

The utility model provides a detachable piston push rod for a clutch, which relates to the technical field of clutch push rods and comprises a piston, a piston seat and a push rod assembly, a bulb block is integrally formed at the end of the push rod assembly, and a mounting groove for assembling the piston seat is arranged on one side of the piston facing the push rod assembly. A sliding hole is formed in the piston seat, a hemispherical groove is formed in the bottom wall of the sliding hole, a sliding ring groove communicated with the mounting groove is formed in the inner wall of the piston seat, the section of the sliding ring groove is an arc-shaped groove larger than 180 degrees, a penetrating hole communicated with the sliding ring groove is formed in the side wall of the piston seat, and a positioning wire strip penetrates through the penetrating hole and the sliding ring groove in a sliding mode. The side wall of the positioning wire strip abuts against the side wall of the side, opposite to the hemispherical groove, of the ball head block. According to the utility model, the push rod assembly can be quickly disassembled by penetrating and extracting the positioning wire strips.

Description

TECHNICAL FIELD

[0001] The utility model relates to clutch push rod technical field, concretely is a detachable piston push rod for clutch. BACKGROUND

[0002] The main role of the clutch piston push rod is to transmit the force of the driver stepping on the clutch pedal and push the clutch separating bearing through the hydraulic system to realize the separation and engagement of the clutch. The push rod of the clutch master cylinder is generally connected with the piston by a plastic push rod seat fixed connection. When disassembled, it cannot be disassembled without damaging the parts, resulting in high rejection rate and high repair cost.

[0003] The utility model with patent No. CN202023289390.9 discloses a detachable clutch master cylinder piston and push rod connecting mechanism for automobile, which is described in the specification: the piston seat side wall around the ball socket is provided with a plurality of open grooves in the circumferential direction, each open groove is arranged in the axial direction, and the open groove is used for deforming the push rod ball head during pressing into the ball socket of the piston seat to facilitate assembly. When the piston seat and the push rod ball head are pressed or pulled separately, the piston seat can expand and deform, but the inner wall of the ball socket needs to be processed into a groove body matched with the push rod ball head and an open groove for deformation, which has high processing difficulty. In addition, the inner wall thickness of the piston seat is uneven, and the insertion and pulling of the push rod ball head will cause uneven stress on the side wall of the ball socket. After repeated disassembly, the inner wall of the ball socket deforms, so that the push rod ball head cannot tightly fit with the ball socket. During the extension and retraction of the piston push rod, the push rod ball head will hit the ball socket and make abnormal noise. UTILITY MODEL CONTENTS

[0004] (I) Technical problem solved

[0005] In view of the deficiencies of the prior art, the utility model provides a detachable piston push rod for clutch, which solves the problems raised in the above background technology.

[0006] (II) Technical scheme

[0007] To achieve the above purpose, the utility model is realized by the following technical scheme:

[0008] The utility model provides a detachable piston push rod for clutch, including piston, piston seat and push rod assembly, the end of push rod assembly is integrative with ball head block, the side of piston towards push rod assembly is provided with the installation groove for assembling piston seat, piston seat is jointed in installation groove, the side of piston seat towards push rod assembly is provided with the sliding slot for inserting ball head block, the bottom wall of sliding slot is provided with semisphere slot, the inner wall of piston seat is provided with sliding ring groove with installation groove intercommunication, the lateral wall of piston seat is provided with the through hole with sliding ring groove intercommunication, the through hole and sliding ring groove slide with the positioning wire, the lateral wall of positioning wire is in contact with the side wall of ball head block away from semisphere slot.

[0009] Preferably, the cross section of the sliding ring groove is a circular arc slot with more than 180 degrees, and the central axis of the cross section of the sliding ring groove is arranged outside the inner wall of the piston seat.

[0010] Preferably, the positioning wire is an elastic iron wire, the positioning wire is provided with a clamping block, the outside of the through hole is provided with a matching groove, the clamping block is slidingly inserted into the matching groove, and the outer edge of the clamping block is flush with the outer wall of the piston seat.

[0011] Preferably, the upper edge of the piston seat is outwardly convex and provided with a positioning ring, the positioning ring is in contact with the upper edge of the piston, the lower side of the outer wall of the piston seat is provided with an L-shaped sliding groove, the inner wall of the installation groove is provided with a locking block, and the locking block is slidingly jointed in the L-shaped sliding groove.

[0012] Preferably, the lower side of the installation groove is connected with a locking groove, a locking piece is slidingly installed in the locking groove, the outer edge of the locking piece is provided with a plurality of sliding columns, the sliding columns are slidingly inserted into the lateral wall of the piston seat, a pressing ring is fixed to the top of the sliding columns, a locking spring is connected between the pressing ring and the piston, a ratchet ring is arranged in the middle of the locking piece, and a ratchet groove is arranged at the lower end of the piston seat and matched with the ratchet ring.

[0013] (Three) beneficial effects

[0014] The utility model provides a detachable piston push rod for clutch. The following beneficial effects are achieved:

[0015] 1. In the utility model, the ball head block of the push rod assembly is placed in the sliding slot in the assembled state, the positioning ring wire is inserted from the through hole and is bent into a ring shape in the sliding ring groove and is in contact with the outside of the ball head block of the push rod assembly, the assembly of the push rod assembly is realized, the piston seat is inserted into the installation groove, the lateral wall of the installation groove is in contact with the outside of the clamping block, and the positioning ring wire can be prevented from sliding out.

[0016] 2, by rotating the piston seat can be through the L-shaped sliding groove piston seat in the axial clamping on the piston, while in the support of the locking spring, the locking piece of the ratchet ring is pulled to the ratchet groove of the lower end of the piston seat to form a lock, so that the piston seat cannot be installed in the reverse rotation of the groove, so that the piston seat can be locked on the piston.

[0017] 3, when it is necessary to disassemble, the pressing ring makes the ratchet ring and the ratchet groove disengage, that is, the piston seat can be reversed to remove the piston seat from the installation groove, and the positioning ring wire can be pulled out, so that the push rod assembly can be disassembled. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The structure diagram of the detachable piston push rod for the clutch of the utility model;

[0019] Figure 2 The utility model discloses an explosion drawing of a detachable piston push rod for the clutch;

[0020] Figure 3 The sectional view of Figure 2 ;

[0021] Figure 4 The structure diagram of the piston seat in the utility model;

[0022] Figure 5 The sectional view of the piston seat in the utility model.

[0023] In the drawing: 1, piston; 2, piston seat; 3, push rod assembly; 4, ball head block; 5, positioning wire; 6, clamping block; 7, positioning ring; 8, L-shaped sliding groove; 9, locking block; 10, locking piece; 11, sliding column; 12, pressing ring; 13, ratchet ring; 14, ratchet groove; 15, locking spring. DETAILED DESCRIPTION

[0024] The technical scheme in the utility model embodiment will be clearly and completely described in combination with the drawings in the utility model embodiment.

[0025] The utility model embodiment provides a detachable piston push rod for the clutch, such as Figures 1-5As shown, including piston 1, piston seat 2 and push rod assembly 3, the end of push rod assembly 3 is integrally formed with a ball block 4, the side of the piston 1 towards the push rod assembly 3 is provided with a mounting groove for assembling the piston seat 2, the piston seat 2 is clamped in the mounting groove, the side of the piston seat 2 towards the push rod assembly 3 is provided with a sliding groove for inserting the ball block 4, the inner diameter of the sliding groove is matched with the ball block 4, the bottom wall of the sliding groove is provided as a semispherical groove, the inner wall of the piston seat 2 is provided with a sliding ring groove in communication with the mounting groove, the cross section of the sliding ring groove is a greater than 180° circular arc groove, the central axis of the cross section of the sliding ring groove is arranged on the outside of the inner wall of the piston seat 2, the side of the greater than 180° circular arc groove towards the inner wall of the piston seat 2 is inwardly convex, the side wall of the piston seat 2 is provided with a through hole in communication with the sliding ring groove, the through hole extends outwardly from the cross section of the sliding ring groove, the communication position of the through hole and the sliding ring groove is connected gently, a positioning wire 5 is slidably arranged in the through hole and the sliding ring groove, the positioning wire 5 is arranged as an elastic iron wire, the positioning wire 5 enters from the through hole, bends into a ring shape under the resistance of the side wall of the sliding ring groove after entering the sliding ring groove, the convex side of the sliding ring groove close to the piston seat 2 can resist the outside of the positioning wire 5, limiting the positioning wire 5, which can avoid the positioning wire 5 from falling out of the sliding ring groove during the threading process, the part of the positioning wire 5 protruding out of the sliding ring groove resists the side wall on the side of the ball block 4 away from the semispherical groove, the ring-shaped positioning wire 5 formed in the sliding ring groove can limit the ball block 4, through the resistance and limitation of the ring-shaped positioning wire 5 and the semispherical groove on both sides of the ball block 4, the ball block 4 can only rotate in the sliding groove and cannot slide up and down, that is, the installation of the push rod assembly 3 is completed, when disassembling, the positioning wire 5 can be pulled out to smoothly remove the push rod assembly 3.

[0026] Further arranged, the positioning wire 5 is provided with a clamping block 6, the outside of the through hole is provided with a matching groove, the clamping block 6 is slidably inserted into the matching groove, the outer side of the clamping block 6 is flush with the outer wall of the piston seat 2, in the assembled state, the piston seat 2 is placed in the mounting groove, the inner wall of the mounting groove blocks the outside of the matching groove, which can hide the clamping block 6, which can avoid the positioning wire 5 from sliding out during use.

[0027] As Figures 1-3As shown, the upper edge of the piston seat 2 is outwardly convexly provided with a positioning ring 7 abutting against the upper edge of the piston 1, and the lower side of the outer wall of the piston seat 2 is provided with an L-shaped sliding groove 8 including a vertical groove and a horizontal groove arranged vertically and in communication with each other, the vertical groove extending to the lower end of the piston seat 2, and the inner wall of the mounting groove is provided with a locking block 9, the width of the locking block 9 being equal to the width of the vertical groove, and the height of the locking block 9 being equal to the width of the horizontal groove, during the sliding of the piston seat 2 in the mounting groove, the locking block 9 can be slid upwardly from the vertical groove until the positioning ring 7 abuts against the upper edge of the piston 1, and the locking block 9 is just slid to be opposite to the horizontal groove, and the locking block 9 can be slid into the horizontal groove by rotating the piston seat 2.

[0028] As shown in the drawings, Figures 2-3 the lower side of the mounting groove is connected with a locking groove, the inner diameter of the locking groove being greater than the inner diameter of the mounting groove, and a locking piece 10 is slidably installed in the locking groove, the outer edge of the locking piece 10 is provided with a plurality of sliding columns 11 slidably penetrating the side wall of the piston seat 2, the top of the sliding column 11 is fixedly provided with a pressing ring 12, the pressing ring 12 is connected with a locking spring 15 between the pressing ring 12 and the piston 1, the middle part of the locking piece 10 is provided with a ratchet ring 13, the lower end of the piston seat 2 is provided with a ratchet groove 14 matched with the ratchet ring 13, the locking direction of the ratchet groove 14 is opposite to the extending direction of the horizontal groove, and under the locking action of the ratchet ring 13 and the ratchet groove 14, the locking block 9 can only be slid into the horizontal groove, and cannot be rotated in the direction of sliding out of the locking block 9.

[0029] Working principle:

[0030] The utility model discloses a piston 1 push rod's process can be pushed to the ball head block 4 of push rod assembly 3 slide into the piston seat 2's sliding groove, and the contact is in the half spherical groove, and the positioning silk strip 5 is in the side wall limitation of sliding ring groove, and the bending is annular and is contacted in the one side of ball head block 4 far from the half spherical groove, and the ball head block 4 is positioned on the upper and lower two sides, when this time, the ball head block 4 can rotate on the piston seat 2 and cannot slide up and down, and the installation of push rod assembly 3 and piston seat 2 is completed by the above-mentioned operation.

[0031] When needing to disassemble, manually contact pressing ring 12, make ratchet ring 13 separate from ratchet slot 14, and the locking of piston seat 2 is released, and reversely rotate, and slide out locking block 9 from L-shaped groove, and piston seat 2 can be smoothly taken out, and after taking out piston seat 2, the matching groove can be exposed, and pulling clamping block 6 can extract positioning silk strip 5, and the positioning contact of ball head block 4 can smoothly disassemble push rod assembly 3.

[0032] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A piston push rod for a detachable clutch, comprising a piston, a piston seat, and a push rod assembly, wherein a ball head block is integrally formed at the end of the push rod assembly, characterized in that: The piston has a mounting groove for assembling a piston seat on the side facing the push rod assembly. The piston seat is snapped into the mounting groove. The piston seat also has a sliding groove for inserting a ball head block on the side facing the push rod assembly. The bottom wall of the sliding groove is a hemispherical groove. The inner wall of the piston seat has a sliding ring groove communicating with the mounting groove. The side wall of the piston seat has a through hole communicating with the sliding ring groove. The through hole extends vertically outward from the cross-section of the sliding ring groove. A positioning thread slides through the through hole and the sliding ring groove. The side wall of the positioning thread abuts against the side wall of the ball head block facing away from the hemispherical groove.

2. The piston push rod for a detachable clutch according to claim 1, characterized in that: The cross-section of the sliding ring groove is an arc-shaped groove with a radius greater than 180°, and the central axis of the cross-section of the sliding ring groove is located on the outer side of the inner wall of the piston seat.

3. A piston push rod for a detachable clutch according to claim 2, characterized in that: The positioning wire is made of elastic iron wire, and the positioning wire is provided with a clamping block. A matching groove is provided on the outside of the through hole. The clamping block is slidably inserted into the matching groove. The outer side of the clamping block is flush with the outer wall of the piston seat.

4. A piston push rod for a detachable clutch according to claim 3, characterized in that: A positioning ring is provided on the upper edge of the piston seat, and the positioning ring abuts against the upper edge of the piston. An L-shaped sliding groove is provided on the lower side of the outer wall of the piston seat, and a locking block is provided on the inner wall of the mounting groove. The locking block slides and engages in the L-shaped sliding groove.

5. A piston push rod for a detachable clutch according to claim 4, characterized in that: A locking groove is connected to the lower side of the mounting groove. A locking piece is slidably installed in the locking groove. Several sliding columns are provided on the outer edge of the locking piece. The sliding columns slide through the side wall of the piston seat. A pressing ring is fixed on the top of the sliding column. A locking spring is connected between the pressing ring and the piston. A ratchet ring is provided in the middle of the locking piece. A ratchet groove that mates with the ratchet ring is provided at the lower end of the piston seat.

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