Test tool for measuring release bearing sleeve nylon loosening force

Abstract

The utility model discloses a test tool for measuring release bearing sleeve nylon loosening force, which belongs to the technical field of release bearings and comprises a bottom plate, and the top surface of the bottom plate is fixedly connected with a vertical plate. According to the utility model, the linear displacement of the tensile testing machine is converted into the rotary displacement in the circumferential direction through the matching of the rack and the gear, the nylon loose force data is accurately measured, the two pull lugs of the metal part of the test sleeve are fixed through the matching of the positioning column, the C-shaped frame and the positioning screw, and the nylon part of the test sleeve is driven through the transmission shaft; force generated when a release bearing is installed on an automobile and two pull lugs are limited and loosening force generated by an inner hole due to friction of a shaft pipe sleeve, impact of a clutch system and the like are simulated, the tensile testing machine is used for measuring rotation torque, equipment investment and occupied space can be reduced, and compared with a traditional durability testing machine, testing time cost and tool clamp cost are reduced; and the stress condition of the sleeve placed in the automobile clutch is better met.

Description

Technical Field

[0001] The utility model relates to the technical field of release bearings, and specifically, to a test tooling for measuring the nylon loosening force of a release bearing sleeve. Background Art

[0002] The clutch release bearing is installed between the clutch and the transmission. The release bearing seat is loosely sleeved on the tubular extension of the first shaft bearing cover of the transmission. When the clutch pedal is depressed, the clutch master cylinder hydraulically drives the clutch slave cylinder. The clutch slave cylinder pushes the release fork, the release fork pushes the clutch release bearing, and the clutch release bearing pulls or pushes the clutch to achieve clutch disengagement. When the clutch pedal is gradually released, the clutch slave cylinder resets and the release fork returns to the initial state. Under the reset function of the clutch diaphragm spring, the clutch release bearing also synchronously returns to the initial state.

[0003] After the release bearing is produced, it needs to be tested. However, a general tensile testing machine can only move linearly up and down and is used to measure tensile stress. A torsion testing machine is not applicable when measuring the torsional force of the nylon inner hole of the release bearing sleeve. Using a durability testing machine to measure the torsional moment of nylon loosening of the release bearing sleeve has a large gap from the actual working conditions of this component installed on the vehicle. Therefore, we propose a test tooling for measuring the nylon loosening force of a release bearing sleeve. Content of the Utility Model

[0004] Aiming at the problems existing in the prior art, the purpose of the utility model is to provide a test tooling for measuring the nylon loosening force of a release bearing sleeve.

[0005] To solve the above problems, the utility model adopts the following technical solutions:

[0006] A test tooling for measuring the nylon loosening force of a release bearing sleeve includes a bottom plate. A vertical plate is fixedly connected to the top surface of the bottom plate. Two slide rails are fixedly installed on the vertical plate. A rack is slidably connected to the two slide rails. The top end of the rack is fixedly connected to a driving shaft. Two bearing seats are fixedly connected to the side part of the vertical plate. Deep groove ball bearings are respectively fixedly sleeved on the two bearing seats. A transmission shaft is fixedly sleeved on the inner sides of the two deep groove ball bearings. A gear is fixedly sleeved on the outer side of the transmission shaft and inside the two bearing seats. The gear and the rack are meshed with each other. A positioning mandrel is installed at one end of the transmission shaft. A test sleeve is sleeved on the outer side of the positioning mandrel. A C-shaped frame is fixedly connected to the top surface of the bottom plate. A positioning screw is threadedly sleeved on the top of the C-shaped frame. The bottom end of the positioning screw abuts against the top of a pull tab on one side of the test sleeve. A positioning post is fixedly connected to the top surface of the bottom plate. The top end of the positioning post abuts against the bottom of a pull tab on the other side of the test sleeve.

[0007] As a preferred embodiment of the present utility model, an axial limiting piece is sleeved on the end of the transmission shaft and inside the positioning mandrel. A fastening bolt is sleeved in the middle of the axial limiting piece, and the end of the fastening bolt is threadedly installed inside the transmission shaft.

[0008] As a preferred embodiment of the present utility model, a first flat key is provided between the gear and the transmission shaft.

[0009] As a preferred embodiment of the present utility model, a second flat key is provided between the transmission shaft and the positioning mandrel.

[0010] As a preferred embodiment of the present utility model, limiting circlips are sleeved on both ends of the outer side of the transmission shaft and located at both ends of the deep groove ball bearing.

[0011] As a preferred embodiment of the present utility model, triangular reinforcing ribs are fixedly connected to both sides of the vertical plate, and the bottom surface of the triangular reinforcing ribs is connected to the top surface of the bottom plate.

[0012] The advantages of the present utility model are as follows:

[0013] In the present utility model, through the cooperation of the rack and the gear, the linear displacement of the tensile testing machine is converted into the rotational displacement in the circumferential direction, and the nylon loosening force data is accurately measured. Through the cooperation of the positioning column, the C-shaped frame and the positioning screw, the two lugs of the metal part of the test sleeve are fixed. The nylon part of the test sleeve is driven by the transmission shaft, simulating the separation bearing installed on the vehicle. The force generated by the two lugs being limited and the loosening force generated by the friction of the inner hole due to a shaft tube sleeve, the impact of the clutch system, etc. In addition, measuring the rotational torque by using the tensile testing machine can reduce the equipment investment and space occupation, reduce the test time cost and fixture cost compared with the traditional durability testing machine, and also more conforms to the force-bearing situation of the sleeve in the automotive clutch, improving the practicability of the test tooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0015] Figure 2 is a cross-sectional view of the positioning mandrel of the present utility model;

[0016] Figure 3 is a schematic diagram of the structure of the positioning mandrel of the present utility model;

[0017] Figure 4 is a schematic diagram of the structure of the test sleeve of the present utility model.

[0018] Description of the reference numerals in the drawings:

[0019] 1. Base plate; 2. Triangular stiffening rib; 3. Bearing seat; 4. Deep groove ball bearing; 5. Vertical plate; 6. Slide rail; 7. Rack; 8. Gear; 9. Transmission shaft; 10. C-shaped frame; 11. Set screw; 12. Locating mandrel; 13. Test sleeve; 14. Locating post; 15. Drive shaft; 16. Limit circlip; 17. First flat key; 18. Second flat key; 19. Axial limiting piece; 20. Fastening bolt. Specific embodiments

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0021] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "top / bottom end", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0022] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "provided with", "sheathed / connected", "connection", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0023] Embodiment:

[0024] Please refer to Figures 1-4, A test tool for measuring the nylon loosening force of a release bearing sleeve, including a bottom plate 1. The top surface of the bottom plate 1 is fixedly connected with a vertical plate 5. Two slide rails 6 are fixedly installed on the vertical plate 5. A rack 7 is slidably connected to the two slide rails 6. The top end of the rack 7 is fixedly connected with a driving shaft 15. Two bearing seats 3 are fixedly connected to the side of the vertical plate 5. Deep groove ball bearings 4 are fixedly sleeved on the two bearing seats 3 respectively. A transmission shaft 9 is fixedly sleeved on the inner sides of the two deep groove ball bearings 4. A gear 8 is fixedly sleeved on the outer side of the transmission shaft 9 and inside the two bearing seats 3. The gear 8 and the rack 7 are meshed with each other. A positioning mandrel 12 is installed at one end of the transmission shaft 9. A test sleeve 13 is sleeved on the outer side of the positioning mandrel 12. A C-shaped frame 10 is fixedly connected to the top surface of the bottom plate 1. A positioning screw 11 is threadedly sleeved on the top of the C-shaped frame 10. The bottom end of the positioning screw 11 abuts against the top of a pull tab on one side of the test sleeve 13. A positioning column 14 is fixedly connected to the top surface of the bottom plate 1. The top end of the positioning column 14 abuts against the bottom of a pull tab on the other side of the test sleeve 13.

[0025] In this embodiment, the model of the deep groove ball bearing 4 is 6207-2RS. In addition, a tensile testing machine is used to drive the driving shaft 15 to move up and down, and the rack 7 is driven to move up and down by the driving shaft 15. In addition, the tensile testing machine has the function of measuring tensile stress to detect the data of this test.

[0026] Specifically, please refer to Figure 2 , An axial limiting piece 19 is sleeved inside the positioning mandrel 12 at the end of the transmission shaft 9. A fastening bolt 20 is sleeved in the middle of the axial limiting piece 19. The end of the fastening bolt 20 is threadedly installed inside the transmission shaft 9.

[0027] In this embodiment, the positioning mandrel 12 is installed at the end of the transmission shaft 9 through the cooperation of the fastening bolt 20 and the axial limiting piece 19. In addition, a threaded hole for installing the fastening bolt 20 is provided at the end of the transmission shaft 9.

[0028] Specifically, please refer to Figure 2 , A first flat key 17 is arranged between the gear 8 and the transmission shaft 9.

[0029] In this embodiment, the first flat key 17 is used to ensure that the gear 8 can drive the transmission shaft 9 to rotate synchronously.

[0030] Specifically, please refer to Figure 2 , A second flat key 18 is arranged between the transmission shaft 9 and the positioning mandrel 12.

[0031] In this embodiment, the second flat key 18 is used to ensure that the transmission shaft 9 can drive the positioning mandrel 12 to rotate synchronously.

[0032] Specifically, please refer to Figure 2, on the outer side of the transmission shaft 9 and at both ends of the deep groove ball bearing 4, limit snap rings 16 are sleeved respectively.

[0033] In this embodiment, the deep groove ball bearing 4 is limited by the limit snap ring 16.

[0034] Specifically, please refer to Figure 1 , triangular stiffeners 2 are fixedly connected to both sides of the vertical plate 5, and the bottom surface of the triangular stiffeners 2 is connected to the top surface of the bottom plate 1.

[0035] In this embodiment, the vertical plate 5 is strengthened and supported by the triangular stiffeners 2, and at the same time, the connection strength between the bottom plate 1 and the vertical plate 5 is ensured.

[0036] Working principle: When in use, first, the test sleeve 13 to be tested is sleeved on the outer side of the positioning mandrel 12. At the same time, the positioning screw 11 is rotated to move up and down, so that the top surface of the ear on one side of the test sleeve 13 abuts against the bottom end of the positioning screw 11, and the bottom surface of the ear on the other side of the test sleeve 13 abuts against the top end of the positioning post 14. Then, the tensile testing machine drives the drive shaft 15 to move upward, the drive shaft 15 drives the rack 7 to move upward, and the rotation of the gear 8, the transmission shaft 9 and the positioning mandrel 12 is driven through the meshing transmission between the rack 7 and the gear 8. At this time, the positioning screw 11 and the positioning post 14 prevent the test sleeve 13 from rotating along with the positioning mandrel 12, so as to test and detect the torsional force between the positioning mandrel 12 and the test sleeve 13. Finally, the sensor on the tensile testing machine is used to detect the tensile stress of the linear movement up and down, so as to collect data, and that's it.

[0037] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its improved concept, makes equivalent substitution or change, and should be covered by the protection scope of the present invention.

Claims

1. A test tool for measuring the nylon loosening force of a release bearing sleeve, comprising a bottom plate (1), characterized in that: The top surface of the bottom plate (1) is fixedly connected with a vertical plate (5). Two slide rails (6) are fixedly installed on the vertical plate (5). A rack (7) is slidably connected to the two slide rails (6). The top end of the rack (7) is fixedly connected with a drive shaft (15). Two bearing seats (3) are fixedly connected to the side of the vertical plate (5). Deep groove ball bearings (4) are respectively fixedly sleeved on the two bearing seats (3). A transmission shaft (9) is fixedly sleeved on the inner sides of the two deep groove ball bearings (4). A gear (8) is fixedly sleeved on the outer side of the transmission shaft (9) and inside the two bearing seats (3). The gear (8) and the rack (7) are meshed with each other. A positioning mandrel (12) is installed at one end of the transmission shaft (9). A test sleeve (13) is sleeved on the outer side of the positioning mandrel (12). A C-shaped frame (10) is fixedly connected to the top surface of the bottom plate (1). A positioning screw (11) is threadedly sleeved on the top of the C-shaped frame (10). The bottom end of the positioning screw (11) abuts against the top of the ear on one side of the test sleeve (13). A positioning column (14) is fixedly connected to the top surface of the bottom plate (1). The top end of the positioning column (14) abuts against the bottom of the ear on the other side of the test sleeve (13).

2. The test tooling for measuring the nylon loosening force of the release bearing sleeve according to claim 1, wherein: An axial limiting piece (19) is sleeved inside the positioning mandrel (12) at the end of the transmission shaft (9). A fastening bolt (20) is sleeved in the middle of the axial limiting piece (19). The end of the fastening bolt (20) is threadedly installed into the interior of the transmission shaft (9).

3. The test tooling for measuring the nylon loosening force of the release bearing sleeve according to claim 1, characterized in that: A first flat key (17) is arranged between the gear (8) and the transmission shaft (9).

4. The test tooling for measuring the nylon loosening force of the release bearing sleeve according to claim 1, wherein: A second flat key (18) is arranged between the transmission shaft (9) and the positioning mandrel (12).

5. The test tooling for measuring the nylon loosening force of the release bearing sleeve according to claim 1, wherein: Limit retaining rings (16) are respectively sleeved at both ends of the transmission shaft (9) and outside the deep groove ball bearings (4).

6. The test tooling for measuring the nylon loosening force of the release bearing sleeve according to claim 1, characterized in that: Triangular stiffening ribs (2) are respectively fixedly connected to both sides of the vertical plate (5). The bottom surface of the triangular stiffening ribs (2) is connected to the top surface of the bottom plate (1).

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