Three-station triaxial loading ball pin durability fatigue testing system

Abstract

This utility model relates to the field of ball pin testing and discloses a three-station triaxial loading ball pin durability fatigue testing system, including a base. An outer frame is fixedly connected to the top surface of the base, and support seats a are fixedly connected to both sides of the base. A rotary drive mechanism is provided on the surface of the left support seat a, and a swing drive mechanism is provided on the outer sidewall of the right support seat a. In this utility model, through the coordinated operation of the rotary drive mechanism, the swing drive mechanism, and three sets of radial loading components, the rotational motion, swinging motion, and multi-directional radial loading of the ball pin can be simultaneously realized, comprehensively simulating the complex stress conditions of the ball pin in actual use. The rotary drive mechanism, through components such as a commutator and an eccentric cam, can drive the ball pin to perform multi-angle rotation testing; the swing drive mechanism directly controls the swinging of the coupling seat, simulating the swinging force of the ball pin; and the radial loading components provide continuous radial load.

Description

Technical Field

[0001] This utility model relates to the field of ball pin testing, and in particular to a three-station triaxial loading ball pin durability fatigue testing system. Background Technology

[0002] A ball pin is a mechanical component, mainly composed of a spherical head and a rod-shaped tail. Its core function is to enable multi-angle rotation, swinging, or hinge between two parts, while transmitting force or motion.

[0003] As a key component in mechanical transmission systems, ball joints are widely used in automobiles, construction machinery and other fields. Their durability and fatigue performance directly affect the safety and service life of the entire transmission system. Therefore, conducting accurate durability and fatigue tests on ball joints is an important step in ensuring their quality.

[0004] However, existing testing equipment has limitations in simulating complex working conditions. In practical applications, ball pins often bear multiple combined forces such as rotation, swaying, and radial loads at the same time. Traditional equipment mostly adopts a single motion mode or a single loading method, which makes it difficult to fully reproduce the actual stress environment of the ball pin. This leads to deviations between the test results and actual usage conditions, and fails to accurately reflect the true durability performance of the ball pin. Therefore, a three-station triaxial loading ball pin durability fatigue test system is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a three-station triaxial loading ball pin durability fatigue testing system, which aims to improve the problem that in the prior art, the ball pin often bears multiple composite forces such as rotation, swaying and radial load at the same time, while traditional equipment mostly adopts a single motion mode or a single loading method, which makes it difficult to fully reproduce the actual stress environment of the ball pin.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a three-station triaxial loading ball pin durability fatigue testing system, comprising a base, an outer frame fixedly connected to the top surface of the base, support seats a fixedly connected to both sides of the base, a rotary drive mechanism provided on the surface of the left support seat a, a swing drive mechanism provided on the outer sidewall of the right support seat a, a coupling seat provided on the inner sidewall of the outer frame, a commutator fixedly connected to the left surface of the coupling seat, an eccentric protrusion plate fixedly connected to the output shaft of the commutator, a connecting rod hinged to the end of the eccentric protrusion plate away from the center point, an eccentric mounting seat hinged to the end of the connecting rod away from the connecting rod, and a clamp assembly detachably mounted on the surface of the eccentric mounting seat by bolts; The clamp assembly includes a connecting seat, on the outer arc surface of which are fitted with two sets of bearings, a screw rod is in contact with the inner wall at the bottom of the connecting seat, an expansion clamping seat is threaded onto the surface of the screw rod, a connecting sleeve is in contact with the inner side wall of the expansion clamping seat, and a positioning locking block a is fixedly connected to the inner wall at the top of the connecting sleeve.

[0007] As a further description of the above technical solution: The rear end of the base is fixedly connected to a support base b, and three sets of radial loading components are provided on the inner side of the support base b. The front end of the radial loading components is fixedly connected to a positioning lock block b.

[0008] As a further description of the above technical solution: The drive end of the rotary drive mechanism is fixedly connected to the left side of the coupling seat.

[0009] As a further description of the above technical solution: The drive end of the radial loading component passes through and is slidably connected to the inner wall of the rear end of the outer frame.

[0010] As a further description of the above technical solution: The surface of the coupling seat has a cavity, and the outer wall of the bearing is in contact with the inner wall of the cavity.

[0011] As a further description of the above technical solution: The bottom end of the connecting seat is slidably connected to the inner wall of the bottom end of the coupling seat cavity.

[0012] As a further description of the above technical solution: The inner wall of the top of the connector has a slot, and the expansion clamping seat passes through and is slidably connected to the inner wall of the slot of the connector.

[0013] As a further description of the above technical solution: The drive end of the swing drive mechanism is fixedly connected to the right side of the coupling seat.

[0014] This utility model has the following beneficial effects: 1. In this utility model, through the coordinated operation of the rotary drive mechanism, the swing drive mechanism, and three sets of radial loading components, the rotational motion, swinging motion, and multi-directional radial loading of the ball pin can be realized simultaneously, comprehensively simulating the complex stress conditions of the ball pin in actual use. The rotary drive mechanism, through components such as the commutator and eccentric cam, can drive the ball pin to perform multi-angle rotation tests; the swing drive mechanism directly controls the swing of the coupling seat to simulate the swinging force of the ball pin; and the radial loading components provide continuous radial load.

[0015] 2. In this utility model, the system adopts a multi-station design, which can test multiple ball pins simultaneously, greatly improving testing efficiency and meeting the needs of batch testing. The fixture assembly, through the cooperation of the expansion clamping seat and the screw, can quickly and firmly clamp the ball pins, and is suitable for fixing ball pins of different specifications, simplifying the clamping process. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the three-position triaxial loading ball pin durability fatigue testing system proposed in this utility model. Figure 2 This is a schematic diagram of the overall rear view structure of the three-station triaxial loading ball pin durability fatigue testing system proposed in this utility model. Figure 3 This is a three-dimensional structural diagram of the positioning lock block b in the three-position triaxial loading ball pin durability fatigue testing system proposed in this utility model. Figure 4 This is a bottom view of the coupling structure of the three-station triaxial loading ball pin durability fatigue testing system proposed in this utility model; Figure 5 This is a schematic diagram of the expansion clamping seat and connecting sleeve in the separated state of the three-station triaxial loading ball pin durability fatigue test system proposed in this utility model. Figure 6 This is a partial cross-sectional view of the connecting seat of the three-station triaxial loading ball pin durability fatigue testing system proposed in this utility model.

[0017] Legend: 1. Base; 2. Outer frame; 3. Support seat a; 4. Rotary drive mechanism; 5. Clamp assembly; 51. Connecting seat; 52. Bearing; 53. Connecting sleeve; 54. Positioning lock block a; 55. Screw; 56. Expansion clamping seat; 6. Reversing device; 7. Swing drive mechanism; 8. Support seat b; 9. Radial loading assembly; 10. Coupling seat; 11. Positioning lock block b; 12. Eccentric protrusion; 13. Connecting rod; 14. Eccentric mounting seat. Detailed Implementation

[0018] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Reference Figure 1 - Figure 3This utility model provides an embodiment of a three-station triaxial loading ball pin durability fatigue testing system, including a base 1. The base 1 is existing technology and can stably support the entire device. An outer frame 2 is fixedly connected to the top surface of the base 1. Hydraulic rods are provided on both sides of the outer frame 2, and the top of the hydraulic rods is equipped with an openable and closable shielding door. This facilitates loading and unloading of the ball pins during testing and also prevents breakage during the testing process, providing effective protection. Support seats a3 are fixedly connected to both sides of the base 1. A rotary drive mechanism 4 is provided on the surface of the left support seat a3. The drive end of the drive mechanism 4 is fixedly connected to the left side of the coupling seat 10. By providing the rotary drive mechanism 4, the rotary drive mechanism 4 as a whole can drive the coupling seat 10 to rotate, thereby allowing the ball pin assembly fixed on the surface of the coupling seat 10 by the clamp assembly 5 to perform a rotational motion test. The rotary drive mechanism 4 is existing technology. The outer side wall of the right support seat a3 is provided with a swing drive mechanism 7. The drive end of the swing drive mechanism 7 is fixedly connected to the right side of the coupling seat 10. The function of the swing drive mechanism 7 is that its drive end can control the coupling seat 10 to swing, thereby allowing the ball pin fixed inside to be tested for swinging motion.

[0020] Reference Figure 3 and Figure 4 The inner side wall of the outer frame 2 is provided with a coupling seat 10. A commutator 6 is fixedly connected to the left side surface of the coupling seat 10. The commutator 6 is existing technology. When the drive end of the rotary drive mechanism 4 is connected to the coupling seat 10, it is connected to the commutator 6, so that the lateral rotation can be converted into vertical rotation. An eccentric protrusion 12 is fixedly connected to the output shaft of the commutator 6. A connecting rod 13 is hinged to the end of the eccentric protrusion 12 away from the center point. An eccentric mounting seat 14 is hinged to the end of the connecting rod 13 away from the connecting rod 13. When the eccentric protrusion 12 reciprocates around the center with the output end of the commutator 6, it will drive the corresponding eccentric mounting seat 14 through the connecting rod 13 to drive the corresponding clamp assembly 5 to rotate on the inner wall of the coupling seat 10, so as to perform rotation test on the ball pin fixed inside the clamp assembly 5. The clamp assembly 5 is detachably installed on the surface of the eccentric mounting seat 14 by bolts.

[0021] Reference Figure 4 - Figure 6The clamp assembly 5 includes a connecting seat 51, the bottom end of which is slidably connected to the inner wall of the bottom end of the cavity of the coupling seat 10. Multiple sets of bolts are threaded onto the bottom end of the connecting seat 51, allowing the connecting seat 51 to be fixed integrally to the surface of the eccentric mounting seat 14. Two sets of bearings 52 are fitted onto the outer arc surface of the connecting seat 51. A cavity is formed on the surface of the coupling seat 10, and the outer wall of the bearing 52 contacts the inner wall of the cavity. By fitting two sets of bearings 52 onto the surface of the connecting seat 51 and ensuring their contact with the inner side of the cavity of the coupling seat 10, the smoothness of rotation of the connecting seat 51 is increased. A screw 55 contacts the inner wall of the bottom end of the connecting seat 51, and an expansion clamping seat 56 is threaded onto the surface of the screw 55. An internal thread groove is formed on the inner wall of the bottom end of the expansion clamping seat 56. The expansion clamping seat 56 is threadedly engaged with the screw 55, allowing it to move linearly up and down on the inner wall of the connecting seat 51. This causes the surface of the expansion clamping seat 56 to deform and expand due to the presence of multiple slots, thereby pressing the connecting sleeve 53 placed inside. The inner wall of the top of the connecting seat 51 has a slot, through which the expansion clamping seat 56 is slidably connected. The inner side wall of the expansion clamping seat 56 contacts the connecting sleeve 53. The inner wall of the top of the connecting sleeve 53 is fixedly connected to a positioning locking block a54. The inner side of the positioning locking block a54 has an internal threaded groove. During installation, the external threaded groove at the front end of the ball pin can be threadedly connected to the positioning locking block a54, and the connecting sleeve 53 can be inserted into the inner side wall of the expansion clamping seat 56.

[0022] Reference Figure 2 and Figure 3 The rear end of the base 1 is fixedly connected to a support seat b8. Three sets of radial loading components 9 are provided on the inner side of the support seat b8. The function of the support seat b8 is to provide support and fixation for the radial loading components 9 when they are working. The driving end of the radial loading component 9 passes through and is slidably connected to the inner wall of the rear end of the outer frame 2. The front end of the radial loading component 9 is fixedly connected to a positioning locking block b11. By setting the positioning locking block b11, its front end is provided with an internal thread groove, so that one side of the ball pin is threadedly connected to the positioning locking block a54, and the other end is engaged and fixed with the internal thread groove of the positioning locking block b11. Thus, radial testing can be performed by driving the radial loading component 9.

[0023] Working principle: Before the test, open the shielding doors controlled by the hydraulic rods on both sides of the outer frame 2 to install and fix the ball pin. Connect the external thread groove at the front end of the ball pin to the positioning locking block a54 on the inner wall of the top of the connecting sleeve 53. Then insert the connecting sleeve 53 into the inner side of the expansion clamping seat 56 in the clamping assembly 5. Then, rotate the screw 55. By using the threaded engagement between the screw 55 and the expansion clamping seat 56, the expansion clamping seat 56 moves upward on the inner wall of the connecting seat 51. The multiple sets of slots on its surface deform and expand, thereby pressing and fixing the connecting sleeve 53. At the same time, the other end of the ball pin engages with the internal thread groove of the positioning locking block b11 at the front end of the radial loading assembly 9 to complete the installation of the ball pin.

[0024] During the test, the rotary drive mechanism 4 is activated, and its drive end drives the coupling seat 10 to rotate. The ball pin assembly fixed on the surface of the coupling seat 10 by the clamp assembly 5 then undergoes a rotational motion test. At the same time, the drive end of the rotary drive mechanism 4 converts the lateral rotation into vertical rotation through the commutator 6. The output shaft of the commutator 6 drives the eccentric protrusion 12 to reciprocate around the center. The eccentric protrusion 12 pulls the eccentric mounting seat 14 through the connecting rod 13, causing the clamp assembly 5 to rotate on the inner wall of the coupling seat 10, further performing a rotational test on the ball pin.

[0025] When the swing drive mechanism 7 is started, its drive end controls the coupling seat 10 to swing, thereby driving the ball pin assembly to perform a swing test, simulating the force situation of the ball pin under swing conditions.

[0026] The radial loading component 9 operates under the support of the support base b8. Its driving end pushes the positioning locking block b11 to apply radial force to the ball pin, thereby realizing the radial loading test of the ball pin.

[0027] Throughout the test, the shielding doors on both sides of the outer frame 2 are closed to provide safety protection for the test and prevent the ball pin from breaking and causing an accident. After the test, the shielding doors are opened and the installation steps are reversed to remove the ball pin and complete the entire test process.

[0028] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A three-station triaxial loading ball pin durability fatigue testing system, comprising a base (1), characterized in that: The top surface of the base (1) is fixedly connected to an outer frame (2). Both sides of the base (1) are fixedly connected to support seats a (3). The surface of the support seat a (3) on the left side is provided with a rotary drive mechanism (4). The outer side wall of the support seat a (3) on the right side is provided with a swing drive mechanism (7). The inner side wall of the outer frame (2) is provided with a coupling seat (10). The left side surface of the coupling seat (10) is fixedly connected to a commutator (6). The output shaft of the commutator (6) is fixedly connected to an eccentric protrusion plate (12). The end of the eccentric protrusion plate (12) away from the center point is hinged to a connecting rod (13). The end of the connecting rod (13) away from the connecting rod (13) is hinged to an eccentric mounting seat (14). The surface of the eccentric mounting seat (14) is detachably mounted with a clamp assembly (5) by bolts. The clamp assembly (5) includes a connecting seat (51), on which two sets of bearings (52) are sleeved on the outer arc surface. The inner wall of the bottom end of the connecting seat (51) contacts a screw (55). The surface of the screw (55) is threadedly connected to an expansion clamping seat (56). The inner side wall of the expansion clamping seat (56) contacts a connecting sleeve (53). The inner wall of the top end of the connecting sleeve (53) is fixedly connected to a positioning locking block a (54).

2. The three-station triaxial loading ball pin durability fatigue testing system according to claim 1, characterized in that: The rear end of the base (1) is fixedly connected to a support seat b (8), and three sets of radial loading components (9) are provided on the inner side of the support seat b (8). The front end of the radial loading component (9) is fixedly connected to a positioning lock block b (11).

3. The three-station triaxial loading ball pin durability fatigue testing system according to claim 1, characterized in that: The drive end of the rotary drive mechanism (4) is fixedly connected to the left side of the coupling seat (10).

4. The three-station triaxial loading ball pin durability fatigue testing system according to claim 2, characterized in that: The drive end of the radial loading component (9) is slidably connected to the inner wall of the rear end of the outer frame (2).

5. The three-station triaxial loading ball pin durability fatigue testing system according to claim 1, characterized in that: The surface of the coupling seat (10) is provided with a cavity, and the outer wall of the bearing (52) is in contact with the inner wall of the cavity.

6. The three-station triaxial loading ball pin durability fatigue testing system according to claim 1, characterized in that: The bottom end of the connecting seat (51) is slidably connected to the inner wall of the bottom end of the cavity of the coupling seat (10).

7. The three-station triaxial loading ball pin durability fatigue testing system according to claim 1, characterized in that: The inner wall of the top of the connecting seat (51) is provided with a slot, and the expansion clamping seat (56) passes through and is slidably connected to the inner wall of the slot of the connecting seat (51).

8. The three-station triaxial loading ball pin durability fatigue testing system according to claim 1, characterized in that: The driving end of the swing drive mechanism (7) is fixedly connected to the right side of the coupling seat (10).

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