A testing device for the strength and durability of ball head pins

Abstract

This invention discloses a ball joint pin strength and durability testing device, relating to the automotive industry technical field, including: a ball joint pin strength and durability testing device, characterized in that: it includes: a cast iron base fixed on the ground, on which a deflection assembly is disposed; multiple ball joint assemblies, which can be arranged and disposed on the deflection assembly; a ball joint pin rotatably disposed in the ball joint assembly; and on the cast iron base, an impact testing assembly and a wear testing assembly can be fixedly disposed as needed on the outer circumference of the deflection assembly.

Description

Technical Field

[0001] This invention relates to the technical field of the automotive industry, specifically to a testing device for the strength and durability of ball joint pins. Background Technology

[0002] For automobiles, the ball joint assembly is a key connecting component of the chassis suspension system and steering system. If the ball joint is of poor quality, it will fail during use due to loosening, breakage and other problems. Therefore, it is necessary to inspect the ball joint in advance. However, the ball joint is in a complex and variable environment during actual operation, making it difficult to simulate the actual working conditions for strength and durability testing. Moreover, the entire test is time-consuming.

[0003] Therefore, it is necessary to provide a device for testing the strength and durability of ball joint pins to solve the problems mentioned in the background art. Summary of the Invention

[0004] To achieve the above objectives, the present invention provides the following technical solution: a ball head pin strength and durability testing device, comprising:

[0005] A cast iron base is fixed to the ground, and a deflection component is provided on the cast iron base;

[0006] Multiple ball joint assemblies can be arranged and disposed on the deflection assembly;

[0007] The ball joint pin is rotatably disposed in the ball joint assembly;

[0008] Furthermore, on the cast iron base, impact testing components and wear testing components can be fixedly installed on the outer circumference of the deflection component as needed.

[0009] Furthermore, preferably, the deflection component includes:

[0010] The support member has its bottom end fixed on the cast iron base, and a rotating sleeve shaft is fitted onto the support member.

[0011] A drive element is fixedly mounted on the cast iron base adjacent to the support member, and a clutch assembly is provided between the drive element and the rotating shaft;

[0012] A transmission disc is sleeved and fixed on the rotating shaft, and the transmission disc rotates synchronously with the rotating shaft;

[0013] A fixed disk is coaxially fixed to the support member, and the fixed disk is located above the transmission disk;

[0014] A calibration ring is coaxially fixed on the lower end face of the transmission disk, and a guide annular groove is provided on the lower end face of the calibration ring;

[0015] The auxiliary wheel assembly includes a support fixed to the cast iron base and a rotating wheel rotatably mounted on the support. The auxiliary wheel assembly is arranged in multiple positions below the calibration ring, and the rotating wheel engages with the annular groove.

[0016] Furthermore, as a preferred embodiment, the transmission disc is provided with multiple buffer grooves, an arc-shaped bearing pad is provided at the end of the buffer groove, and a friction strip is also provided on the transmission disc.

[0017] Furthermore, as a preferred embodiment, the fixed disk has multiple auxiliary fixing grooves around its circumference, and also has an annular positioning groove, in which a connecting groove penetrating the fixed disk is formed.

[0018] Furthermore, preferably, the ball joint assembly includes:

[0019] The outer ball seat is mounted on the fixed plate;

[0020] An inner ball seat is fitted with an interference fit inside the inner ball seat, and a housing that rotates with the ball head pin is fixed inside the inner ball seat.

[0021] Furthermore, as a preferred embodiment, the outer ball seat is provided with an auxiliary fixing hole for alignment with the auxiliary fixing groove, and a transmission frustum limited by the positioning groove is fixedly provided at the bottom of the outer ball seat.

[0022] Furthermore, as a preferred embodiment, the inner ball seat is provided with a flange to restrict the deflection of the ball head pin, and friction balls can be placed inside the housing.

[0023] Furthermore, as a preferred embodiment, the impact testing assembly includes a cast iron frame, a load-bearing beam, a calibration motor, a deflection shaft, and a fixing clamp. The cast iron frame is fixed on the cast iron base, and the load-bearing beam is fixedly mounted on the cast iron frame. The calibration motor is fixedly mounted on the load-bearing beam, and the deflection shaft is rotatably mounted on the load-bearing beam and driven by the calibration motor. A fixing clamp is fixed on the deflection shaft in a perpendicular manner to the axis, and the fixing clamp is used to hold and fix the ball head pin.

[0024] Furthermore, preferably, the axis of the deflection shaft intersects and is perpendicular to the axis of the support member.

[0025] Furthermore, as a preferred embodiment, the wear test assembly includes a second cast iron frame, a rotating shaft, a rotating motor, and grippers. The second cast iron frame is fixedly mounted on the cast iron base, and the rotating shaft is rotatably mounted on the second cast iron frame in a manner perpendicular to the surface of the fixed disk. The rotating shaft is driven by the rotating motor, and the grippers are fixed to the lower end face of the rotating shaft and are used to clamp and fix the ball head pin.

[0026] Compared with the prior art, the present invention provides a device for testing the strength and durability of ball joint pins, which has the following beneficial effects:

[0027] 1. In this invention, the buffer groove and friction strip provide two different connection methods for the ball head assembly: impact and friction. The buffer groove can impact the ball head assembly after the transmission disk accelerates within a certain range, while the friction strip can drive the ball head assembly to move. These two different connection methods can be well matched with the impact test assembly and wear test assembly for testing. Furthermore, the bearing pad can be thickened to ensure that the arc surface of the impact part has a sufficiently large contact area with the ball head assembly, ensuring impact stability. Moreover, the impact force returning to the transmission disk is along the radial direction of the transmission disk, and the buffer groove can also be used to buffer the reverse rotation of the transmission disk, making the entire testing process more efficient and stable.

[0028] 2. In this invention, during the rotation of the ball joint assembly around the support member, the corresponding ball pin head moves accordingly, the ball pin neck is aligned with the fixed clamp, and the deflection shaft deflects to simulate the swinging process of the ball pin. The ball joint assembly uses an impact connection method to simulate fracture and complete the strength test. In addition, the rotating shaft drives the ball pin to rotate continuously, causing the ball pin to rub against the friction ball. At the same time, the ball joint assembly uses a friction connection method to simulate friction and complete the friction detachment test. The two tests are performed simultaneously, effectively improving efficiency. Attached Figure Description

[0029] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0030] Figure 1 This is a schematic diagram of the overall structure of a ball head pin strength and durability testing device;

[0031] Figure 2 A schematic diagram of the deflection assembly structure of a ball head pin strength and durability testing device;

[0032] Figure 3 A schematic diagram of the transmission disc structure of a ball head pin strength and durability testing device;

[0033] Figure 4 A schematic diagram of the ball head seat assembly structure of a ball head pin strength and durability testing device;

[0034] Figure 5 This is a schematic diagram of the impact testing component structure of a ball head pin strength and durability testing device;

[0035] Figure 6 This is a schematic diagram of the wear test component structure of a ball head pin strength and durability testing device;

[0036] In the diagram: 1. Cast iron base; 2. Deflection assembly; 21. Support component; 22. Rotating sleeve shaft; 23. Drive element; 24. Clutch assembly; 25. Transmission disc; 251. Buffer groove; 252. Bearing pad; 253. Friction strip; 26. Fixed disc; 261. Auxiliary fixing groove; 262. Positioning groove; 263. Connecting groove; 27. Calibration ring; 28. Auxiliary wheel set; 3. Ball head seat assembly; 31. Outer ball seat; 311. Auxiliary fixing hole; 32. Inner ball seat; 321. Flange; 33. Housing; 34. Transmission frustum; 4. Ball head pin; 5. Impact test assembly; 51. Cast iron frame one; 52. Bearing beam; 53. Calibration motor; 54. Deflection shaft; 55. Fixed chuck; 6. Wear test assembly; 61. Cast iron frame two; 62. Rotating shaft; 63. Rotating motor; 64. Clamping jaw. Detailed Implementation

[0037] Please see Figure 1-6 In this embodiment of the invention, a ball-head pin strength and durability testing device includes:

[0038] A cast iron base 1 is fixed to the ground, and a deflection component 2 is provided on the cast iron base 1;

[0039] Multiple ball joint assemblies 3 can be arranged and disposed on the deflection assembly 2;

[0040] Ball pin 4 is rotatably disposed in the ball head assembly 3;

[0041] Furthermore, on the cast iron base 1, an impact test component 5 and a wear test component 6 can be fixedly installed on the outer circumference of the deflection component 2 as needed.

[0042] It should be explained that the failure of ball head pin 4 usually manifests in two forms: fracture and wear and detachment. One is that when the suspension vibrates too much, motion interference will occur, causing ball head pin 4 to be subjected to additional bending moment. The contact interference between the neck of ball head pin 4 and ball head cup will cause wear grooves to appear on the neck of ball head pin 4, resulting in fatigue cracks and fatigue fracture of ball head pin 4. The other situation is that during use, the dust cover is damaged, allowing mud and water to enter the ball head cup through the hole. During the continuous swinging and rotation of ball head pin 4, it cannot be effectively lubricated, causing excessive wear, and ball head pin 4 will fail due to gap and detachment.

[0043] In this application, a deflection assembly 2 is set on a cast iron base 1 with good stability and shock absorption capabilities. At the same time, multiple ball head seat assemblies 3 on the base are controlled to deflect around the deflection assembly 2. In addition, an impact test assembly 5 and a wear test assembly 6 are installed to simulate the actual failure of the ball head pin 4. Under the premise of ensuring the stability of the device, test results that are more in line with the actual situation can be obtained efficiently.

[0044] In this embodiment, as Figure 2 The deflection component 2 includes:

[0045] The support member 21 has its bottom end fixed on the cast iron base 1, and a rotating shaft 22 is sleeved on the support member 21. Specifically, the support member 21 is divided into two parts: one part is a metal shaft fixed on the cast iron base 1, and the other part is a cast iron disc coaxially fixed on the upper end face of the connecting shaft.

[0046] The drive element 23 is fixedly mounted on the cast iron base 1 adjacent to the support member 21, and a clutch assembly 24 is provided between the drive element 23 and the rotating shaft 22. Specifically, the drive element 23 can be a high-power motor or a hydraulic press, which can be selected according to the required power and actual conditions. The drive element 23 and the clutch assembly 24 cooperate to transmit power. During the impact test, the clutch assembly 24 can control the on and off of the power transmission to avoid the drive element 23 being subjected to reverse impact.

[0047] The transmission disc 25 is sleeved and fixed on the rotating shaft 22. The transmission disc 25 rotates synchronously with the rotating shaft 22. The transmission disc 25 is also made of cast iron to ensure that the transmission disc 25 has a large inertia, so as to provide sufficient power for subsequent impact testing.

[0048] The fixed disk 26 is coaxially fixed on the support member 21, and the fixed disk 26 is located above the transmission disk 25;

[0049] The calibration ring 27 is coaxially fixed on the lower end face of the transmission disk 25, and the lower end face of the calibration ring 27 is provided with a guide annular groove;

[0050] The auxiliary wheel assembly 28 includes a support fixed to the cast iron base 1 and a rotating wheel rotatably mounted on the support. Multiple auxiliary wheel assemblies 28 are arranged below the calibration ring 27, and the rotating wheel cooperates with the annular groove. Specifically, the auxiliary wheel assembly 28, in cooperation with the calibration ring 27, can effectively guide the rotation of the transmission disk 25. At the same time, multiple auxiliary wheel assemblies 28 are arranged below the calibration ring 27 to effectively provide support and ensure the stability of the transmission disk 25.

[0051] It should be explained that, under the control of the drive element 23 and the clutch assembly 24, the rotating shaft 22 and the transmission disk 25 rotate around their own axes. The main operation process is to keep the drive element 23 in the start state, and to control the rotating shaft 22 to rotate intermittently in both directions by intermittently connecting it through the clutch assembly 24.

[0052] As a preferred embodiment, such as Figure 3As shown, the transmission disk 25 is provided with multiple buffer grooves 251, and an arc-shaped bearing pad 252 is provided at the end of the buffer groove 251. Friction strips 253 are also provided on the transmission disk 25. Specifically, the buffer grooves 251 and friction strips 253 provide two different connection methods for the ball head assembly 3: impact and friction. The buffer grooves 251 can impact the ball head assembly 3 after the transmission disk 25 accelerates within a certain range. The friction strips 253 can drive the ball head assembly 3 to move. The two different connection methods can be well used in conjunction with the impact test assembly 5 and the wear test assembly 6 for testing. The bearing pad 252 can thicken the arc surface of the impact part to ensure a sufficiently large contact surface with the ball head assembly 3, ensuring impact stability. Moreover, the impact force returning to the transmission disk 25 is radial along the transmission disk 25, and the buffer grooves 251 can also buffer the transmission disk 25 to rotate in the opposite direction. The whole testing process is more efficient and stable.

[0053] In a preferred embodiment, the fixed disk 26 is provided with a plurality of auxiliary fixing grooves 261 around its circumference, and the fixed disk 26 is also provided with an annular positioning groove 262, and a connecting groove 263 penetrating the fixed disk 26 is also provided in the positioning groove 262.

[0054] In this embodiment, as Figure 4 The ball joint assembly 3 includes:

[0055] The outer ball seat 31 is disposed on the fixed plate 26;

[0056] An inner ball seat 32 is fitted with an interference fit inside the inner ball seat 32, and a housing 33 that rotates and engages with the ball head pin 4 is fixed inside the inner ball seat 32.

[0057] In a preferred embodiment, the outer ball seat 31 is provided with an auxiliary fixing hole 311 for alignment with the auxiliary fixing groove 261, and a transmission frustum 34 limited by the positioning groove 262 is fixedly provided at the bottom of the outer ball seat 31. Specifically, the transmission frustum 34 can pass through the positioning groove 262 and be inserted into the buffer groove 251, and the transmission frustum 34 passes through the positioning groove 262 and rubs against the friction strip 253 through the lower end face of the transmission frustum 34. Moreover, the initial position of the ball head assembly 3 is determined by the auxiliary fixing groove 261 and the auxiliary fixing hole 311.

[0058] In a preferred embodiment, the inner ball seat 32 is provided with a flange 321 to restrict the deflection of the ball head pin 4. Specifically, by setting the flange 321 to squeeze the neck of the ball head pin 4 in the extreme deflection state of the ball head pin 4, the actual impact state of the ball head pin 4 is simulated. Friction balls can be installed inside the housing 33. Specifically, the friction balls simulate the state of the ball head pin 4 contacting mud and sand.

[0059] In this embodiment, as Figure 5The impact testing assembly 5 includes a cast iron frame 51, a load-bearing beam 52, a calibration motor 53, a deflection shaft 54, and a fixing clamp 55. The cast iron frame 51 is fixed on the cast iron base 1, and the load-bearing beam 52 is fixedly mounted on the cast iron frame 51. The calibration motor 53 is fixedly mounted on the load-bearing beam 52. The deflection shaft 54 ​​is rotatably mounted on the load-bearing beam 52 and driven by the calibration motor 53. A fixing clamp 55 is fixed on the deflection shaft 54 ​​in a vertical manner. The fixing clamp 55 is used to clamp and fix the ball head pin 4. Specifically, the calibration motor 53 can control the ball head pin 4 to deflect to a vertical state.

[0060] In a preferred embodiment, the axis of the deflection shaft 54 ​​intersects and is perpendicular to the axis of the support member 21. Specifically, during the rotation of the ball head assembly 3 around the support member 21, the head of the corresponding ball head pin 4 moves accordingly, the neck of the ball head pin 4 is in contact with the fixed clamp 55, and the deflection of the corresponding deflection shaft 54 ​​can simulate the swinging process of the ball head pin 4. The corresponding ball head assembly 3 adopts an impact connection method to simulate fracture and complete the strength test.

[0061] In this embodiment, as Figure 6 The wear test assembly 6 includes a cast iron frame 61, a rotating shaft 62, a rotating motor 63, and a gripper 64. The cast iron frame 61 is fixedly mounted on the cast iron base 1, and the rotating shaft 62 is rotatably mounted on the cast iron frame 61 in a manner perpendicular to the surface of the fixed disk 26. The rotating shaft 62 is driven by the rotating motor 63. The gripper 64 is fixed to the lower end face of the rotating shaft 62 and is used to clamp and fix the ball head pin 4. Specifically, the gripper 64 elastically clamps the ball head pin 4 and does not restrict the deflection of the ball head pin 4 while clamping it.

[0062] It should be explained that the ball pin 4 is continuously rotated by the rotating shaft 62, so that the ball pin 4 rubs against the friction ball. At the same time, the ball seat assembly 3 adopts a friction connection method to simulate friction and complete the friction detachment test.

[0063] In practical implementation, a deflection assembly 2 is installed on a cast iron base 1 with good stability and shock absorption capabilities. Under the control of the drive element 23 and the clutch assembly 24, the rotating shaft 22 and the transmission disk 25 rotate around their own axis. The main operation process is to keep the drive element 23 in the start state, and intermittently connect the rotating shaft 22 through the clutch assembly 24 to control the ball head seat assembly 3 to deflect controllably around the deflection assembly 2. In addition, the impact test assembly 5 and the wear test assembly 6 are installed to simulate the actual failure of the ball head pin 4. Under the premise of ensuring the stability of the device, test results that are more in line with the actual situation can be obtained efficiently.

[0064] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A device for testing the strength and durability of ball-end pins, characterized in that: include: A cast iron base (1) is fixed on the ground, and a deflection component (2) is provided on the cast iron base (1); Multiple ball joint assemblies (3) can be arranged on the deflection assembly (2); The ball head pin (4) is rotatably disposed in the ball head seat assembly (3); Furthermore, on the cast iron base (1), an impact test component (5) and a wear test component (6) can be fixedly installed on the outer circumference of the deflection component (2) as needed; The deflection component (2) includes: The support member (21) is fixed at its bottom end to the cast iron base (1), and a rotating shaft (22) is sleeved on the support member (21); A drive element (23) is fixedly disposed on the cast iron base (1) adjacent to the support member (21), and a clutch assembly (24) is disposed between the drive element (23) and the rotating shaft (22); A transmission disc (25) is sleeved and fixed on the rotating shaft (22), and the transmission disc (25) rotates synchronously with the rotating shaft (22); A fixed disk (26) is coaxially fixed on the support member (21), and the fixed disk (26) is located above the transmission disk (25); The calibration ring (27) is coaxially fixed on the lower end face of the transmission disk (25), and the lower end face of the calibration ring (27) is provided with a guide annular groove; The auxiliary wheel assembly (28) includes a support fixed to the cast iron base (1) and a rotating wheel rotatably mounted on the support. The auxiliary wheel assembly (28) is arranged in multiple positions below the calibration ring (27), and the rotating wheel cooperates with the annular groove. The transmission disc (25) is provided with multiple buffer grooves (251), and an arc-shaped bearing pad (252) is provided at the end of the buffer groove (251). Friction strips (253) are also provided on the transmission disc (25). The fixed disk (26) has multiple auxiliary fixing grooves (261) around its circumference, and the fixed disk (26) also has an annular positioning groove (262), and the positioning groove (262) also has a connecting groove (263) that penetrates the fixed disk (26). The ball joint assembly (3) includes: An outer ball seat (31) is provided on the fixed plate (26). The outer ball seat (31) has an auxiliary fixing hole (311) for aligning with the auxiliary fixing groove (261). A transmission frustum (34) limited by the positioning groove (262) is fixedly provided at the bottom of the outer ball seat (31). The inner ball seat (32) is interference-fitted into the outer ball seat (31), and a housing (33) that rotates with the ball head pin (4) is fixed inside the inner ball seat (32).

2. The ball head pin strength and durability testing device according to claim 1, characterized in that: The inner ball seat (32) is provided with a flange (321) to restrict the deflection of the ball head pin (4), and friction balls can be placed inside the housing (33).

3. The ball-head pin strength and durability testing device according to claim 1, characterized in that: The impact testing assembly (5) includes a cast iron frame (51), a load-bearing beam (52), a calibration motor (53), a deflection shaft (54), and a fixing clamp (55). The cast iron frame (51) is fixed on the cast iron base (1), and the load-bearing beam (52) is fixed on the cast iron frame (51). The calibration motor (53) is fixed on the load-bearing beam (52). The deflection shaft (54) is rotatably mounted on the load-bearing beam (52) and driven by the calibration motor (53). A fixing clamp (55) is fixed on the deflection shaft (54) in a perpendicular manner to the axis. The fixing clamp (55) is used to clamp and fix the ball head pin (4).

4. The ball head pin strength and durability testing device according to claim 3, characterized in that: The axis of the deflection shaft (54) intersects and is perpendicular to the axis of the support (21).

5. The ball head pin strength and durability testing device according to claim 1, characterized in that: The wear test assembly (6) includes a second cast iron frame (61), a rotating shaft (62), a rotating motor (63), and a gripper (64). The second cast iron frame (61) is fixedly mounted on the cast iron base (1), and the rotating shaft (62) is rotatably mounted on the second cast iron frame (61) in a manner perpendicular to the surface of the fixed disk (26). The rotating shaft (62) is driven by the rotating motor (63). The gripper (64) is fixed to the lower end face of the rotating shaft (62) and is used to clamp and fix the ball head pin (4).

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