A device for comprehensive fatigue detection of automobile ball head

Abstract

This utility model relates to the technical field of automotive ball joint fatigue testing devices, specifically a comprehensive fatigue testing device for automotive ball joints, comprising: a base plate with a frame and a base fixed to its top; a hydraulic tappet mechanism fixed to the surface of the frame; a sealing cover and an air conditioner movably mounted on the top of the base plate; a clamp provided on the top of the base plate; and a rod hole opened on the surface of the sealing cover, into which the hydraulic rod of the hydraulic tappet mechanism is movably inserted. The beneficial effect is that the interior of the sealing cover is sealed, and then the air conditioner is activated for cooling or heating, thereby regulating the temperature inside the sealing cover. Once the desired temperature is reached, the hydraulic rod of the hydraulic tappet mechanism can continue to extend, applying radial loading to the automotive ball joint under test, thus completing the test. By repeatedly adjusting the temperature inside the sealing cover and conducting multiple tests on the automotive ball joint, the fatigue strength of the automotive ball joint under various temperature conditions can be measured.

Description

Technical Field

[0001] This utility model relates to the field of automobile ball joint fatigue testing devices, specifically a comprehensive fatigue testing device for automobile ball joints. Background Technology

[0002] The ball joint is an important part of a car, usually composed of a housing, ball pin, dust cover, spring, and bushing. The ball pin consists of a ball end and a threaded rod end. The ball end has a precision-machined spherical surface, is embedded in the housing, and can rotate in multiple directions. It connects to the steering knuckle or wheel hub and is fixed by a nut. The connection between the ball end and the threaded rod end often needs to withstand a large radial force. Therefore, fatigue testing of the ball pin of the car ball joint is required. The fatigue testing of the car ball joint is usually carried out by a servo hydraulic fatigue testing machine.

[0003] In the prior art, Chinese patent application number CN202222225416.6 discloses a microcomputer-controlled electro-hydraulic servo fatigue testing machine, including a test chamber, a detector mounted on the test chamber, a connecting rod mounted on the detector, a connecting plate mounted on the connecting rod, a hydraulic cylinder mounted on the test chamber, a top plate mounted on the hydraulic cylinder, and a transmission mechanism mounted on the top plate. This invention produces the following advantages: 1. Simple structure, convenient operation, and good fixation effect; 2. More stable testing, improving testing accuracy.

[0004] However, automotive ball joints exhibit varying fatigue strengths under different temperature conditions. When using existing microcomputer-controlled electro-hydraulic servo fatigue testing machines to perform fatigue testing on automotive ball joints, it is impossible to provide a variety of different temperature environments for the test, thus making it impossible to comprehensively evaluate the fatigue strength level of automotive ball joints. Utility Model Content

[0005] The purpose of this invention is to provide a comprehensive fatigue testing device for automotive ball joints to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a comprehensive fatigue testing device for automobile ball joints, comprising: a base plate with a frame and a base fixed at the top, a hydraulic tappet mechanism fixed on the surface of the frame, a sealing cover and an air conditioner movably installed at the top of the base plate, a clamp provided at the top of the base plate, and a rod hole opened on the surface of the sealing cover, wherein the hydraulic rod of the hydraulic tappet mechanism is movably inserted into the rod hole.

[0007] Preferably, a sealing ring is fixed in the rod hole. The sealing ring has an annular plate structure, and the hydraulic rod of the hydraulic tappet mechanism is movably inserted into the inner ring of the sealing ring.

[0008] Preferably, an air conditioner installation groove is formed at the top of the base, the air conditioner is movably installed in the air conditioner installation groove, and a dust-proof cover is movably inserted into the air conditioner installation groove.

[0009] Preferably, two first handle grooves are formed on the surface of the base, and two second handle grooves are formed on the surface of the dust-proof cover. The two first handle grooves and the two second handle grooves are symmetrically distributed with respect to the dust-proof cover.

[0010] Preferably, the fixture includes a fixed clamping plate and a movable clamping plate. A first screw hole is formed on the surface of the fixed clamping plate, and a first screw is rotatably connected to the surface of the movable clamping plate. The first screw is installed in the first screw hole by threaded connection.

[0011] Preferably, a spring is sleeved on the screw rod of the first screw. One end of the spring abuts against the surface of the fixed clamping plate, and the other end of the spring abuts against the surface of the movable clamping plate.

[0012] Preferably, a first anti-slip pad is fixed on the surface of the fixed clamping plate, and a second anti-slip pad is fixed on the surface of the movable clamping plate. Both the first anti-slip pad and the second anti-slip pad are in the structure of a rectangular plate body.

[0013] Preferably, a sealing gasket is fixed at the bottom end of the sealing cover. The sealing gasket is in the structure of a "hui" - shaped plate body, and the bottom end of the sealing gasket abuts against the surface of the base.

[0014] Preferably, a mounting plate is fixed on the surface of the sealing cover, a second screw hole is formed on the surface of the base, a second screw is rotatably connected to the surface of the mounting plate, and the second screw is installed in the second screw hole by threaded connection.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] For the automotive ball joint comprehensive fatigue detection device proposed by the present utility model, the automotive ball joint to be detected is clamped on the fixture, then the sealing cover is installed on the base. After that, the hydraulic rod of the hydraulic tappet mechanism is extended and inserted into the rod hole. After insertion, the sealing ring seals the gap between the inner wall of the rod hole and the hydraulic rod of the hydraulic tappet mechanism, and the sealing gasket seals the gap between the bottom end of the sealing cover and the base. After the above preparations, the interior of the sealing cover is in a sealed state. Then the air conditioner is started to cool or heat, so as to adjust the temperature inside the sealing cover. After reaching the required temperature, the hydraulic rod of the hydraulic tappet mechanism can be further extended to radially load the tested automotive ball joint to complete the test. After adjusting the temperature inside the sealing cover multiple times and testing the automotive ball joint multiple times, the fatigue strength performance of the automotive ball joint under various temperature conditions can be measured. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic cross-sectional view of the present invention.

[0019] Figure 3 This is a schematic diagram of the cross-sectional structure of the second screw hole;

[0020] Figure 4 for Figure 3 Enlarged schematic diagram of the structure at point A in the middle;

[0021] Figure 5 for Figure 3 Enlarged schematic diagram of the structure at point B;

[0022] Figure 6 This is a schematic diagram of the cross-sectional structure of the fixture;

[0023] Figure 7 for Figure 6 Enlarged schematic diagram of the structure at point C.

[0024] In the diagram: 1. Base plate; 2. Frame; 3. Base; 4. Sealing cover; 5. Hydraulic push rod mechanism; 6. Rod hole; 7. Sealing ring; 8. Air conditioner mounting slot; 9. Air conditioner; 10. Dust cover; 11. Sealing gasket; 12. Clamp; 13. First handle groove; 14. Second handle groove; 15. Fixed clamping plate; 16. Moving clamping plate; 17. First screw hole; 18. First screw; 19. Spring; 20. First anti-slip pad; 21. Second anti-slip pad; 22. Mounting plate; 23. Second screw hole; 24. Second screw. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clear and complete, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of this utility model, and are merely used to explain the embodiments of this utility model. They are not intended to limit the embodiments of this utility model. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0026] Example 1: Please refer to Figures 1-7, the present utility model provides a technical solution: a comprehensive fatigue detection device for automotive ball joints, comprising: a bottom plate 1. A frame 2 and a base 3 are fixed to the top end of the bottom plate 1. A hydraulic tappet mechanism 5 is fixed on the surface of the frame 2. A sealing cover 4 and an air conditioner 9 are movably installed on the top end of the bottom plate 1. A fixture 12 is provided on the top end of the bottom plate 1. A rod hole 6 is formed on the surface of the sealing cover 4. The hydraulic rod of the hydraulic tappet mechanism 5 is movably inserted into the rod hole 6. A sealing ring 7 is fixed in the rod hole 6. The sealing ring 7 is in the structure of an annular plate. The hydraulic rod of the hydraulic tappet mechanism 5 is movably inserted into the inner ring of the sealing ring 7. A sealing gasket 11 is fixed to the bottom end of the sealing cover 4. The sealing gasket 11 is in the structure of a "return" shaped plate. The bottom end of the sealing gasket 11 abuts against the surface of the base 3.

[0027] During actual use, the automotive ball joint to be detected is clamped on the fixture 12, then the sealing cover 4 is installed on the base 3. After that, the hydraulic rod of the hydraulic tappet mechanism 5 is extended and inserted into the rod hole 6. After insertion, the sealing ring 7 seals the gap between the inner wall of the rod hole 6 and the hydraulic rod of the hydraulic tappet mechanism 5, and the sealing gasket 11 seals the gap between the bottom end of the sealing cover 4 and the base 3. After completing the above preparations, the inside of the sealing cover 4 is in a sealed state. Then the air conditioner 9 is started to refrigerate or heat, so as to adjust the temperature inside the sealing cover 4. After reaching the required temperature, the hydraulic rod of the hydraulic tappet mechanism 5 can be further extended to radially load the tested automotive ball joint to complete the test. After adjusting the temperature inside the sealing cover 4 multiple times and testing the automotive ball joint multiple times, the fatigue strength results of the automotive ball joint under various temperature conditions can be measured.

[0028] Embodiment 2: On the basis of Embodiment 1, in order to prevent sundries from falling into the air conditioner installation groove 8 and affecting the air conditioner 9, an air conditioner installation groove 8 is formed at the top end of the base 3. The air conditioner 9 is movably installed in the air conditioner installation groove 8. A dust-proof cover 10 is movably inserted into the air conditioner installation groove 8. A first handle groove 13 is formed on the surface of the base 3. A second handle groove 14 is formed on the surface of the dust-proof cover 10. Both the first handle groove 13 and the second handle groove 14 are provided with two groups, and the two groups of first handle grooves 13 and the two groups of second handle grooves 14 are symmetrically distributed with respect to the dust-proof cover 10.

[0029] A dust-proof cover 10 is provided at the opening of the air conditioner installation groove 8. A large number of uniformly distributed small holes are formed on the surface of the dust-proof cover 10, which can enable the air conditioner 9 to input cold and hot air into the sealing cover 4, and at the same time prevent sundries from falling into the air conditioner installation groove 8 and damaging the air conditioner 9. In addition, when the air conditioner 9 needs to be overhauled, insert the finger into the first handle groove 13 and dig into the second handle groove 14, and then the dust-proof cover 10 can be removed from the air conditioner installation groove 8 to overhaul the air conditioner 9.

[0030] Example 3: Based on Example 2, in order to realize the disassembly and assembly of the sealing cover 4, a mounting plate 22 is fixed on the surface of the sealing cover 4, a second screw hole 23 is opened on the surface of the base 3, and a second screw 24 is rotatably connected to the surface of the mounting plate 22. The second screw 24 is installed in the second screw hole 23 by threaded connection.

[0031] When the sealing cover 4 needs to be installed on the base 3, place the sealing cover 4 on the base 3. The second screw 24, which is rotatably connected to the surface of the mounting plate 22, is provided with a hand-tightening lever, so that the second screw 24 can be screwed directly into the second screw hole 23 by hand, and the sealing cover 4 can be easily installed on the base 3. When the sealing cover 4 needs to be removed from the base 3, simply unscrew the second screw 24 from the second screw hole 23 by hand, and then the sealing cover 4 can be easily removed.

[0032] Example 4: Based on Example 3, in order to clamp the car ball joint with the first hand groove 13, the clamp 12 includes a fixed clamping plate 15 and a movable clamping plate 16. A first screw hole 17 is provided on the surface of the fixed clamping plate 15. A first screw 18 is rotatably connected to the surface of the movable clamping plate 16. The first screw 18 is installed in the first screw hole 17 by threaded connection. A spring 19 is sleeved on the screw shank of the first screw 18. One end of the spring 19 abuts against the surface of the fixed clamping plate 15, and the other end of the spring 19 abuts against the surface of the movable clamping plate 16. A first anti-slip pad 20 is fixed on the surface of the fixed clamping plate 15, and a second anti-slip pad 21 is fixed on the surface of the movable clamping plate 16. Both the first anti-slip pad 20 and the second anti-slip pad 21 are rectangular plate structures.

[0033] When clamping the car ball joint with the first hand groove 13, first screw 18 is tightened. Under the action of the threaded connection between the first screw 18 and the first screw hole 17, the first screw 18 moves upward. At the same time, the compressed spring 19 pushes the moving clamp 16 upward, so that the first anti-slip pad 20 and the second anti-slip pad 21 are separated by a certain distance. Then, one end of the car ball joint is inserted between the first anti-slip pad 20 and the second anti-slip pad 21. Then, the first screw 18 is tightened in the opposite direction, so that the first screw 18 moves downward. The first screw 18 pushes the moving clamp 16 downward. When the first screw 18 is tightened, the first anti-slip pad 20 and the second anti-slip pad 21 are compressed, and a great friction force is generated between them and the car ball joint. This allows the car ball joint to be clamped between the fixed clamp 15 and the moving clamp 16, thus achieving the clamping of the car ball joint with the first hand groove 13.

[0034] In actual use, the car ball joint to be tested is clamped on the fixture 12, and then the sealing cover 4 is installed on the base 3. Next, the hydraulic rod of the hydraulic tappet mechanism 5 is extended and inserted into the rod hole 6. After insertion, the sealing ring 7 seals the gap between the inner wall of the rod hole 6 and the hydraulic rod of the hydraulic tappet mechanism 5, and the sealing gasket 11 seals the gap between the bottom end of the sealing cover 4 and the base 3. After completing the above preparations, the inside of the sealing cover 4 is sealed. Then, the air conditioner 9 is activated to cool or heat, thereby adjusting the temperature inside the sealing cover 4. Once the desired temperature is reached, the hydraulic rod of the hydraulic tappet mechanism 5 can be extended further to apply radial loading to the car ball joint being tested. After completing the test, by repeatedly adjusting the temperature inside the sealing cover 4 and conducting multiple tests on the automotive ball joint, the fatigue strength of the automotive ball joint under various temperature conditions can be measured. A dust cover 10 is installed at the opening of the air conditioning mounting slot 8. The surface of the dust cover 10 has a large number of uniform small holes, which allows the air conditioner 9 to input hot and cold air into the sealing cover 4, while preventing debris from falling into the air conditioning mounting slot 8 and causing damage to the air conditioner 9. In addition, when it is necessary to repair the air conditioner 9, insert your fingers into the first latch groove 13 and pry into the second latch groove 14, and then you can remove the dust cover 10 from the air conditioning mounting slot 8 to repair the air conditioner 9. When the sealing cover 4 is installed on the base 3, place the sealing cover 4 on the base 3. The second screw 24, which is rotatably connected to the surface of the mounting plate 22, is provided with a hand-tightening lever, so that the second screw 24 can be directly screwed into the second screw hole 23 by hand, thus easily installing the sealing cover 4 onto the base 3. When it is necessary to remove the sealing cover 4 from the base 3, simply unscrew the second screw 24 from the second screw hole 23 by hand, and then the sealing cover 4 can be easily removed. When using the first hand groove 13 to clamp the car ball joint, first screw 18 is screwed. Under the action of the threaded connection between the first screw 18 and the first screw hole 17, the first screw 18 moves upward. The compressed spring 19 pushes the movable clamping plate 16 upward, causing a certain distance to be separated between the first anti-slip pad 20 and the second anti-slip pad 21. Then, one end of the car ball joint is inserted between the first anti-slip pad 20 and the second anti-slip pad 21. Then, the first screw 18 is turned in the opposite direction, causing the first screw 18 to move downward. The first screw 18 pushes the movable clamping plate 16 downward. When the first screw 18 is tightened, the first anti-slip pad 20 and the second anti-slip pad 21 are compressed, generating a great friction force with the car ball joint. This allows the car ball joint to be clamped between the fixed clamping plate 15 and the movable clamping plate 16, thus achieving the clamping of the car ball joint by the first hand groove 13.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A comprehensive fatigue testing device for automotive ball joints, comprising: The top end of the bottom plate (1) is fixed with a frame (2) and a base (3). A hydraulic tappet mechanism (5) is fixed on the surface of the frame (2). It is characterized in that: a sealing cover (4) and an air conditioner (9) are movably installed at the top end of the bottom plate (1). A clamp (12) is arranged at the top end of the bottom plate (1). A rod hole (6) is formed on the surface of the sealing cover (4). The hydraulic rod of the hydraulic tappet mechanism (5) is movably inserted into the rod hole (6).

2. The comprehensive fatigue testing device for automobile ball joints according to claim 1, characterized in that: A sealing ring (7) is fixed in the rod hole (6). The sealing ring (7) is in the structure of an annular plate body. The hydraulic rod of the hydraulic tappet mechanism (5) is movably inserted into the inner ring of the sealing ring (7).

3. The comprehensive fatigue testing device for automobile ball joints according to claim 1, characterized in that: An air conditioner installation groove (8) is formed at the top end of the base (3). The air conditioner (9) is movably installed in the air conditioner installation groove (8). A dust-proof cover (10) is movably inserted into the air conditioner installation groove (8).

4. The comprehensive fatigue testing device for automobile ball joints according to claim 3, characterized in that: A first handle groove (13) is formed on the surface of the base (3). A second handle groove (14) is formed on the surface of the dust-proof cover (10). Both the first handle groove (13) and the second handle groove (14) are provided with two groups. The two groups of first handle grooves (13) and the two groups of second handle grooves (14) are symmetrically distributed about the dust-proof cover (10).

5. The comprehensive fatigue testing device for automobile ball joints according to claim 1, characterized in that: The clamp (12) includes a fixed clamping plate (15) and a movable clamping plate (16). A first screw hole (17) is formed on the surface of the fixed clamping plate (15). A first screw (18) is rotatably connected to the surface of the movable clamping plate (16). The first screw (18) is installed in the first screw hole (17) through threaded connection.

6. The comprehensive fatigue testing device for automobile ball joints according to claim 5, characterized in that: A spring (19) is sleeved on the screw rod of the first screw (18). One end of the spring (19) abuts against the surface of the fixed clamping plate (15), and the other end of the spring (19) abuts against the surface of the movable clamping plate (16).

7. The comprehensive fatigue testing device for automobile ball joints according to claim 5, characterized in that: A first anti-slip pad (20) is fixed on the surface of the fixed clamping plate (15). A second anti-slip pad (21) is fixed on the surface of the movable clamping plate (16). Both the first anti-slip pad (20) and the second anti-slip pad (21) are in the structure of a rectangular plate body.

8. The comprehensive fatigue testing device for automobile ball joints according to claim 1, characterized in that: A sealing gasket (11) is fixed at the bottom end of the sealing cover (4). The sealing gasket (11) is in the structure of a "return" - shaped plate body. The bottom end of the sealing gasket (11) abuts against the surface of the base (3).

9. The comprehensive fatigue testing device for automobile ball joints according to claim 1, characterized in that: An installation plate (22) is fixed on the surface of the sealing cover (4). A second screw hole (23) is formed on the surface of the base (3). A second screw (24) is rotatably connected to the surface of the installation plate (22). The second screw (24) is installed in the second screw hole (23) through threaded connection.

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