A clutch release fork testing tool

Abstract

This utility model relates to the field of power component testing technology, specifically to a clutch release fork testing tool, including a base plate, a positioning mandrel seat, a positioning mandrel, a vertical plate, a testing plate, a swing block, a testing block seat, a testing mandrel seat, a testing mandrel, and a push rod; a rolling bearing is provided at the contact point between the swing block and the push rod, and a guide sleeve is provided between the testing mandrel seat and the testing mandrel. This utility model maintains stable testing accuracy during long-term use, extends its service life, and meets the requirements for high-precision testing.

Description

Technical Field

[0001] This utility model relates to the field of power component testing technology, specifically to a clutch release fork testing tool. Background Technology

[0002] As a key transmission component of the automotive clutch, the release fork's pin hole accuracy, fork foot groove size, and fork foot curvature directly affect the clutch's disengagement performance and require rigorous testing. Traditional testing relies on manual visual inspection or simple tools, which suffers from low efficiency and large errors. To address this, patent application number 201320157778.4 discloses a clutch release fork inspection tool. Through the coordinated design of the base plate, positioning mandrel, inspection plate, and push rod, it achieves simultaneous inspection of three indicators—pin hole, groove, and fork foot curvature—in a single operation, significantly improving inspection efficiency.

[0003] However, long-term use revealed that the rigid planar / point contact structure at the contact point between the push rod and the swing block of this fixture causes wear on the contact surface due to repeated pushing of the swing block during testing. This results in increased clearance, deviation of the rotation angle of the detection plate, and ultimately affects the accuracy of the groove size detection, making it difficult to meet high-precision testing requirements. Therefore, it is urgent to improve the structure of the contact point to solve the problem of accuracy reduction caused by wear. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a clutch release fork testing tool to solve the problem of decreased accuracy caused by wear of the contact parts of the original inspection tool.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A clutch release fork testing tool includes a base plate, a positioning mandrel seat, a positioning mandrel, a vertical plate, a testing plate, a swing block, a testing block seat, a testing mandrel seat, a testing mandrel, and a push rod; the contact portion between the swing block and the push rod is provided with a rolling bearing, and a guide sleeve is provided between the testing mandrel seat and the testing mandrel.

[0007] As a further embodiment of this utility model: the rolling bearing is embedded in the swing block facing the push rod, the inner ring of the rolling bearing is fixedly connected to the swing block, and the outer ring is in contact with the push rod and can rotate freely.

[0008] As a further embodiment of this utility model, one end of the push rod contacts the rolling bearing, and the contacting end face is an arc surface.

[0009] As a further embodiment of this utility model: the guide sleeve is a self-lubricating plastic sleeve, which is fixedly installed in the through hole of the detection mandrel seat, and the detection mandrel passes through the guide sleeve.

[0010] As a further improvement of this utility model, the surface of the push rod that contacts the rolling bearing is made of a wear-resistant material.

[0011] By adopting the above technical solution, this utility model will have the following beneficial effects:

[0012] Firstly, the rolling bearing added to the contact part between the swing block and the push rod converts sliding friction into rolling friction, which significantly reduces the wear rate of the contact surface, avoids the increase in the fit clearance due to wear, ensures the accuracy of the rotation angle of the detection plate, and thus maintains the detection accuracy of the groove size.

[0013] Secondly, the guide sleeve set between the detection mandrel seat and the detection mandrel constrains the movement trajectory of the detection mandrel, preventing it from deviating and causing the contact position between the push rod and the swing block to deviate, thus reducing the generation of additional wear;

[0014] Compared with the prior art, the above-mentioned structural improvements of this utility model enable the inspection tool to maintain stable detection accuracy during long-term use, extend its service life, and meet the requirements of high-precision detection. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a top view schematic diagram of the existing clutch release fork structure;

[0017] Figure 2 This is a side view of a schematic diagram of an existing clutch release fork.

[0018] Figure 3 This is a top view of the clutch release fork detection tool described in this embodiment of the utility model;

[0019] Figure 4 for Figure 1 A front view of the clutch disengagement fork testing tool described in the embodiment;

[0020] Figure 5 for Figure 1 A perspective view of the pendulum block described in the embodiment;

[0021] Figure 6 for Figure 5 Exploded view.

[0022] The correspondence between the labels and component names in the attached figures is as follows:

[0023] 1. Base plate; 10. Through hole; 11. Detection mandrel; 12. Linkage rod; 13. Handle; 14. Push rod; 15. Positioning mandrel; 16. Groove; 17. Positioning hole; 18. Fork foot; 2. Vertical plate; 3. Swing block; 31. Rolling bearing; 32. Support rod; 4. Detection plate; 5. Protrusion; 6. Detection block seat; 7. Fork detection block; 8. Positioning mandrel seat; 9. Detection mandrel seat; 91. Guide sleeve. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0025] Please refer to Figure 1-4 In one embodiment of the clutch release fork testing tool provided by this utility model, the basic structure of the clutch release fork testing tool is consistent with the original patent, including a base plate 1, a positioning mandrel seat 8, a positioning mandrel 15 horizontally arranged on the positioning mandrel seat 8, a vertical plate 2 at one end of the base plate 1, a testing plate 4 hinged to the vertical plate 2, a protrusion 5 at one end of the testing plate 4 and a swing block 3 at the other end, a testing block seat 6 between the vertical plate 2 and the positioning mandrel seat 8, a testing mandrel seat 9 at the other end of the base plate 1, a testing mandrel 11 movably arranged in the testing mandrel seat 9, a push rod 14 connected to the outer end of the testing mandrel 11 through a linkage rod 12, and a handle 13 at the outer end of the testing mandrel 11.

[0026] The improvements in this embodiment are as follows:

[0027] 1. Setting of rolling bearing 31

[0028] like Figure 4-6 As shown, the aforementioned swing block 3 has a mounting groove on the side facing the push rod 14. A support rod 32 and a rolling bearing 31 are housed within the mounting groove. Both ends of the support rod 32 are fixedly connected to the inner wall of the mounting groove. The rolling bearing 31 is a deep groove ball bearing or a needle roller bearing. The inner ring of the rolling bearing 31 is coaxially fixed to the support rod 32 via an interference fit. The outer ring of the rolling bearing 31 can rotate freely and protrude from the mounting groove, contacting one end of the push rod 14. The end face of the push rod 14 that contacts the outer ring of the rolling bearing 31 is machined into an arc surface to increase the contact area and reduce stress concentration.

[0029] 2. Setting of guide sleeve 91

[0030] like Figure 4As shown, a guide sleeve 91 is fixedly installed in the through hole 10 of the above-mentioned detection mandrel seat 9. In this embodiment, the guide sleeve 91 is a self-lubricating plastic sleeve (such as polytetrafluoroethylene material). Its inner diameter is in clearance fit with the outer diameter of the detection mandrel 11 (the clearance is controlled at 0.05-0.1mm). The detection mandrel 11 passes through the guide sleeve 91 to ensure that it moves in a straight line when it moves, and avoids the contact position between the push rod 14 and the swing block 3 being deviated due to offset.

[0031] 3. Application of wear-resistant materials

[0032] The arc surface of the push rod 14 and the outer ring surface of the rolling bearing 31 are both treated with wear-resistant materials: the main body of the push rod 14 is made of 45 steel, and the arc surface is surface hardened (hardness HRC50-55); the outer ring of the rolling bearing 31 is made of stainless steel (such as 304 stainless steel), and the surface is coated with tungsten carbide coating (thickness 5-10μm) to further improve the wear resistance of the contact parts.

[0033] The working principle of this utility model is as follows:

[0034] During testing, the clutch release fork ( Figure 1 and Figure 2 The clutch release fork is fitted onto the positioning mandrel 15 through the positioning hole 17. Rotating the clutch release fork counterclockwise causes it to engage with the arc-shaped fork detection block 7 of the detection block seat 6, completing the initial detection of the fork foot 18's curvature. If the fork foot 18 is qualified, pushing the handle 13 causes the detection mandrel 11 to move linearly along the guide sleeve 91, and the linkage rod 12 drives the push rod 14 forward synchronously. At this time, the arc surface of the push rod 14 contacts the outer ring of the rolling bearing 31 at the bottom of the swing block 3, pushing the swing block 3 upward through rolling friction. The detection plate 4 rotates clockwise around the hinge point of the vertical plate 2 until the protrusion 5 of the detection plate 4 is embedded in the groove 16 of the release fork foot 18. If the groove 16 has been machined and is qualified, the rolling bearing 31 is just on the upper surface of the push rod 14, and the swing block 3 no longer rises, entering a holding state. If the groove 16 has not been machined or is unqualified, the swing block 3's lift is insufficient, and the push rod 14 cannot continue forward, thus checking whether the groove 16 is qualified.

[0035] Since the rolling friction of the rolling bearing 31 replaces the original rigid contact sliding friction, and the guide sleeve 91 ensures the linear movement of the detection mandrel 11, the wear of the contact parts is significantly reduced; at the same time, the application of wear-resistant materials further extends the service life of the gauge and ensures the accuracy of the rotation angle of the detection plate 4 during long-term use, thereby ensuring the detection accuracy of the groove 16 size.

[0036] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A clutch release fork testing tool, comprising a base plate (1), a positioning mandrel seat (8), a positioning mandrel (15), a vertical plate (2), a testing plate (4), a swing block (3), a testing block seat (6), a testing mandrel seat (9), a testing mandrel (11), and a push rod (14); characterized in that: The contact area between the swing block (3) and the push rod (14) is provided with a rolling bearing (31), and a guide sleeve (91) is provided between the detection mandrel seat (9) and the detection mandrel (11).

2. The clutch disengagement fork testing tool according to claim 1, characterized in that: The rolling bearing (31) is embedded in the swing block (3) on the side facing the push rod (14). The inner ring of the rolling bearing (31) is fixedly connected to the swing block (3), and the outer ring is in contact with the push rod (14) and can rotate freely.

3. The clutch disengagement fork detection tool according to claim 1 or 2, characterized in that: One end of the push rod (14) is in contact with the rolling bearing (31), and the contact end face is an arc surface.

4. The clutch disengagement fork testing tool according to claim 1, characterized in that: The guide sleeve (91) is a self-lubricating plastic sleeve, which is fixedly installed in the through hole (10) of the detection mandrel seat (9), and the detection mandrel (11) passes through the guide sleeve (91).

5. The clutch disengagement fork testing tool according to claim 1, characterized in that: The surface of the push rod (14) that contacts the rolling bearing (31) is made of wear-resistant material.

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