A chassis ball joint gap detection structure

Abstract

This utility model discloses a chassis ball joint clearance detection structure in the field of motor vehicle maintenance technology. It includes a base embedded in the ground, a longitudinal double-rod hydraulic cylinder mounted on the base, the output end of which is fixedly connected to a connecting frame. A transverse double-rod hydraulic cylinder is mounted on the connecting frame, the output end of which is fixedly connected to a movable platform. The movable platform and the connecting frame are connected via a transverse guide assembly, enabling transverse movement. The connecting frame and the base are connected via a longitudinal guide assembly, enabling longitudinal movement. This utility model solves the problems of insufficient thrust and motion vibration, improving overall rigidity and response efficiency.

Description

Technical Field

[0001] This utility model relates to the field of motor vehicle maintenance technology, and in particular to a chassis ball joint clearance detection structure. Background Technology

[0002] In the field of motor vehicle inspection and repair, accurate observation of chassis clearance is a crucial step in ensuring the safety of the vehicle's steering system. Typically, testing equipment requires moving the wheels in multiple directions so that maintenance personnel in a pit can visually assess the steering system clearance.

[0003] In the prior art, a quick-reset chassis clearance observation device is disclosed, with publication number CN221325440U and application date of 2023-11-24. It includes a movable platform, a lateral movable seat, a longitudinal movable seat, and a base frame. The base frame is a square frame structure, embedded entirely in the ground. The base frame contains the lateral movable seat and the longitudinal movable seat, with the longitudinal movable seat fixedly connected to the movable platform. The lateral movable seat is located below the longitudinal movable seat. The lateral movable seat is connected to the base frame via a lateral movable component, enabling lateral movement. The longitudinal movable seat is connected to the lateral movable seat via a longitudinal movable component, enabling longitudinal movement. This observation device can move wheels placed on the movable platform in different directions, facilitating inspection personnel in the vehicle's undercarriage pit to observe the steering system clearance of the vehicle frame. Its shortcomings are as follows: using two cylinders as the power source, the output force is greatly affected by air pressure fluctuations. Under the load of heavy vehicle wheels, insufficient thrust or jerking movement is likely to occur, resulting in discontinuous displacement of the platform. It is difficult for maintenance personnel to observe fine gaps, which reduces the accuracy of the test. The layered design of two transverse cylinders, two longitudinal cylinders, transverse moving seat and longitudinal moving seat increases the number of components and connection points. The multi-stage transmission structure is prone to cumulative movement errors, which reduces the accuracy of platform reset and affects the consistency of repeated tests. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a chassis ball joint clearance detection structure and detection mechanism, which solves the problems of insufficient thrust and motion vibration, and improves overall rigidity and response efficiency.

[0005] The purpose of this utility model is achieved as follows: a chassis ball joint gap detection structure includes a base embedded in the ground, a longitudinal double-rod hydraulic cylinder is provided on the base, the output end of the longitudinal double-rod hydraulic cylinder is fixedly connected to a connecting frame, a transverse double-rod hydraulic cylinder is provided on the connecting frame, the output end of the transverse double-rod hydraulic cylinder is fixedly connected to a movable platform, the movable platform and the connecting frame are connected by a transverse guide component, and transverse movement is achieved by the transverse guide component, the connecting frame and the base are connected by a longitudinal guide component, and longitudinal movement is achieved by the longitudinal guide component.

[0006] When this utility model is in use, when the vehicle wheel is placed on the moving platform, the longitudinal double-rod hydraulic cylinder is activated, and its output end pushes the connecting frame to move longitudinally relative to the base along the longitudinal guide assembly; the transverse double-rod hydraulic cylinder works, and directly drives the moving platform to move laterally along the transverse guide assembly through its output end; this process, through the precise control of the hydraulic system, enables the moving platform to move smoothly and controllably in both the transverse and longitudinal directions, thereby simulating the multi-directional movement of the wheel, making it easy for maintenance personnel in the pit to clearly observe the clearance changes of the chassis ball joint or steering system from below. Compared with the prior art, the beneficial effects of this utility model are as follows: the dual-rod hydraulic cylinder can provide greater thrust and smoother motion output, making it suitable for heavy loads. It solves the common vibration and hysteresis problems of pneumatic systems, improves the stability and accuracy of movement, and avoids inaccurate platform displacement due to insufficient force, thus making it easier for inspectors to observe minute gaps. The hydraulic cylinder and guide assembly are directly integrated through the connecting frame, eliminating redundant intermediate seats (such as the lateral moving seat in the prior art), reducing the number of components and connection points, reducing the risk of failure, and improving overall rigidity and durability. The lateral and longitudinal guide assemblies are tightly coupled with the hydraulic output end, enhancing the resistance to eccentric loads, avoiding skewed movement trajectories, ensuring the linearity and repeatability of platform displacement, and providing a reliable basis for gap observation.

[0007] As a further improvement of this utility model, the transverse guide assembly includes two guide crossbars symmetrically distributed on both sides of the transverse double-rod hydraulic cylinder. The guide crossbars are fitted with two transverse linear bearings, which are distributed on both sides of the connecting frame and fixedly connected to the movable platform. The longitudinal guide assembly includes two guide longitudinal rods symmetrically distributed on both sides of the longitudinal double-rod hydraulic cylinder. The guide longitudinal rods are fitted with two longitudinal linear bearings, which are fixedly connected to the ends of the corresponding guide crossbars. The ends of the two guide longitudinal rods are fixedly connected to the base through mounting seats.

[0008] As a further improvement of this utility model, the base includes a base plate, a base frame and a fixed platform. The inner cavity formed by the base plate and the base frame can accommodate a longitudinal double-rod hydraulic cylinder, a connecting frame, a transverse double-rod hydraulic cylinder, a transverse guide assembly and a longitudinal guide assembly. The upper side of the base frame is fixedly connected to the fixed platform, and the fixed platform has an avoidance notch along the moving path of the moving platform.

[0009] As a further improvement of this utility model, the cylinder body of the longitudinal double-rod hydraulic cylinder is mounted on the upper side of the base plate via a fixed seat.

[0010] As a further improvement of this utility model, the movable platform includes a support plate, and two fixing blocks are provided on the lower side of the support plate for fixed connection with the output end of the transverse double-rod hydraulic cylinder. A rectangular platform for supporting the car is provided on the upper side of the support plate.

[0011] As a further improvement of this utility model, the support plate is provided with several weight-reducing hollowed-out parts.

[0012] As a further improvement of this utility model, the connecting frame includes a cross-shaped connecting plate. The lower side of the long side of the cross-shaped connecting plate is provided with a connecting seat for fixed connection with the output end of the longitudinal double-rod hydraulic cylinder. The upper side of the long side of the cross-shaped connecting plate is provided with a limiting seat for fixed connection with the guide crossbar. The upper side of the short side of the cross-shaped connecting plate is fixedly connected to the cylinder body of the transverse double-rod hydraulic cylinder.

[0013] As a further improvement of this utility model, several elastic limiting members are provided on the outer side of the connection between the bottom frame and the fixed platform. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0015] Figure 1 This is a three-dimensional structural diagram of the chassis ball joint gap detection structure of this utility model.

[0016] Figure 2 This is a three-dimensional structural diagram of the transverse guide component and the longitudinal guide component in this utility model.

[0017] Figure 3 This is a three-dimensional structural diagram of the support plate in this utility model.

[0018] Figure 4 This is a three-dimensional structural diagram of the connecting frame in this utility model.

[0019] Figure 5 This is a three-dimensional structural diagram of the chassis ball joint gap detection mechanism of this utility model.

[0020] The components include: 1. Base, 101. Base plate, 102. Base frame, 103. Fixed platform, 2. Longitudinal double-rod hydraulic cylinder, 3. Connecting frame, 301. Cross-shaped connecting plate, 302. Connecting seat, 303. Limiting seat, 4. Transverse double-rod hydraulic cylinder, 5. Guide crossbar, 6. Transverse linear bearing, 7. Guide longitudinal rod, 8. Longitudinal linear bearing, 9. Moving platform, 901. Support plate, 901a. Hollowed-out part, 901b. Fixing block, 902. Rectangular platform, 10. Mounting seat, 11. Elastic limiting component. Detailed Implementation

[0021] 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.

[0022] like Figure 1-3 The chassis ball joint clearance detection structure shown includes a base 1 embedded in the ground. A longitudinal double-rod hydraulic cylinder 2 is installed on the base 1. The output end of the longitudinal double-rod hydraulic cylinder 2 is fixedly connected to a connecting frame 3. A transverse double-rod hydraulic cylinder 4 is installed on the connecting frame 3. The output end of the transverse double-rod hydraulic cylinder 4 is fixedly connected to a movable platform 9. The movable platform 9 and the connecting frame 3 are connected by a transverse guide assembly, and transverse movement is achieved through the transverse guide assembly. The connecting frame 3 and the base 1 are connected by a longitudinal guide assembly, and longitudinal movement is achieved through the longitudinal guide assembly.

[0023] Specifically, the lateral guide assembly includes two guide crossbars 5 symmetrically distributed on both sides of the lateral double-rod hydraulic cylinder 4. Two lateral linear bearings 6 are sleeved on the guide crossbars 5. The two lateral linear bearings 6 are distributed on both sides of the connecting frame 3 and fixedly connected to the moving platform 9. The longitudinal guide assembly includes two guide longitudinal rods 7 symmetrically distributed on both sides of the longitudinal double-rod hydraulic cylinder 2. Two longitudinal linear bearings 8 are sleeved on the guide longitudinal rods 7. The longitudinal linear bearings 8 are fixedly connected to the ends of the corresponding guide crossbars 5. The ends of the two guide longitudinal rods 7 are fixedly connected to the base 1 through the mounting seat 10. The symmetrically distributed guide crossbars 5 and guide longitudinal rods 7, each with two linear bearings, form a four-point multi-support structure, effectively distributing the load and preventing the moving platform 9 from tilting under uneven wheel load.

[0024] Specifically, the base 1 includes a base plate 101, a base frame 102, and a fixed platform 103. The cylinder body of the longitudinal double-rod hydraulic cylinder 2 is mounted on the upper side of the base plate 101 via a fixed seat. The inner cavity formed by the base plate 101 and the base frame 102 can accommodate the longitudinal double-rod hydraulic cylinder 2, the connecting frame 3, the transverse double-rod hydraulic cylinder 4, the transverse guide assembly, and the longitudinal guide assembly. It is isolated from the external environment, effectively preventing dust, moisture, or foreign objects from entering and reducing the risk of wear and corrosion. The upper side of the base frame 102 is fixedly connected to the fixed platform 103, providing an additional support surface, making the movement of the moving platform 9 more stable. The fixed platform 103 has a clearance notch along the movement path of the moving platform 9, which allows the moving platform 9 to move freely and covers the opening of the base 1 to prevent personnel or tools from accidentally falling into the ditch.

[0025] Specifically, the movable platform 9 includes a support plate 901. The lower side of the support plate 901 is provided with two fixing blocks 901b for fixed connection with the output end of the transverse double-rod hydraulic cylinder 4. The fixing blocks 901b and the output end of the double-rod hydraulic cylinder form a multi-point anchoring structure to ensure uniform transmission of hydraulic thrust and reduce displacement deviation. The upper side of the support plate 901 is provided with a rectangular platform 902 for supporting the car, providing a wide and flat bearing surface, distributing the load more evenly, and preventing local deformation. Considering the lightweight structure, multiple weight-reducing hollow parts 901a are provided on the support plate 901.

[0026] Specifically, the connecting frame 3 includes a cross-shaped connecting plate 301. The lower side of the long side of the cross-shaped connecting plate 301 is provided with a connecting seat 302 for fixed connection with the output end of the longitudinal double-rod hydraulic cylinder 2. The upper side of the long side of the cross-shaped connecting plate 301 is provided with a limiting seat 303 for fixed connection with the guide crossbar 5. The upper side of the short side of the cross-shaped connecting plate 301 is fixedly connected to the cylinder body of the transverse double-rod hydraulic cylinder 4. Through the cross-shaped layout, the load stress is distributed to ensure that the connecting frame 3 remains stable during bidirectional movement.

[0027] This utility model also proposes a chassis ball joint clearance detection mechanism, including the two chassis ball joint clearance detection structures mentioned above, such as... Figure 5 As shown, the two detection structures are arranged horizontally side by side, covering both wheels of the vehicle and supporting synchronous detection. The two base frames 102 are provided with multiple equally spaced elastic limiting members 11 on the other sides except for the opposite side. The elastic limiting members 11 are made of a bent structure of a material with high elasticity and wear resistance, such as 65Mn or 60Si2Mn. They form a buffer barrier on the side of the base 1, which can absorb the inertial force or vibration generated when the moving platform 9 is displaced, and prevent the entire structure from loosening or shifting in the foundation.

[0028] In use, the longitudinal double-rod hydraulic cylinder 2 is activated, and its output end pushes the connecting frame 3 to move longitudinally relative to the base 1 along the longitudinal guide assembly. The transverse double-rod hydraulic cylinder 4 works, driving the moving platform 9 to move laterally along the transverse guide assembly through its output end. Throughout the displacement process, the guide assembly ensures smooth and linear movement, while the elastic limiter 11 provides buffering on the side of the base 1 to prevent overshoot or collision. Finally, the multi-directional displacement of the moving platform 9 simulates wheel movement, allowing maintenance personnel in the pit to clearly observe the clearance changes of the chassis ball joint or steering system. The entire process is precisely controlled by the hydraulic system, achieving rapid and controllable testing operations. The advantages of this invention are: the use of double-rod hydraulic cylinders instead of traditional pneumatic cylinders provides stronger and more continuous thrust, avoids movement vibration, ensures displacement accuracy, and facilitates the observation of minute gaps; the integrated design of the cross-shaped connecting plate 301 with the connecting seat 302 and the limiter 303 enhances torsional resistance, reduces component redundancy, and improves overall stability; the use of linear bearings and symmetrical guide assemblies reduces frictional resistance, ensures the linearity of the movement trajectory, and improves testing repeatability.

[0029] The above description of the embodiments is only for the purpose of helping to understand the structure and core idea of ​​this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A chassis ball joint clearance detection structure, characterized in that, The device includes a base embedded in the ground, on which a longitudinal double-rod hydraulic cylinder is mounted. The output end of the longitudinal double-rod hydraulic cylinder is fixedly connected to a connecting frame. A transverse double-rod hydraulic cylinder is mounted on the connecting frame. The output end of the transverse double-rod hydraulic cylinder is fixedly connected to a movable platform. The movable platform and the connecting frame are connected by a transverse guide assembly, which enables transverse movement. The connecting frame and the base are connected by a longitudinal guide assembly, which enables longitudinal movement.

2. The chassis ball joint clearance detection structure according to claim 1, characterized in that, The transverse guide assembly includes two guide crossbars symmetrically distributed on both sides of the transverse double-rod hydraulic cylinder. The guide crossbars are fitted with two transverse linear bearings, which are distributed on both sides of the connecting frame and fixedly connected to the movable platform. The longitudinal guide assembly includes two guide longitudinal rods symmetrically distributed on both sides of the longitudinal double-rod hydraulic cylinder. The guide longitudinal rods are fitted with two longitudinal linear bearings, which are fixedly connected to the ends of the corresponding guide crossbars. The ends of the two guide longitudinal rods are fixedly connected to the base through mounting seats.

3. The chassis ball joint clearance detection structure according to claim 1, characterized in that, The base includes a base plate, a base frame, and a fixed platform. The inner cavity formed by the base plate and the base frame can accommodate a longitudinal double-rod hydraulic cylinder, a connecting frame, a transverse double-rod hydraulic cylinder, a transverse guide assembly, and a longitudinal guide assembly. The upper side of the base frame is fixedly connected to the fixed platform. The fixed platform has an avoidance notch along the moving path of the moving platform.

4. The chassis ball joint clearance detection structure according to claim 3, characterized in that, The cylinder body of the longitudinal double-rod hydraulic cylinder is mounted on the upper side of the base plate via a fixed seat.

5. The chassis ball joint clearance detection structure according to claim 1, characterized in that, The movable platform includes a support plate, and two fixing blocks are provided on the lower side of the support plate for fixed connection with the output end of the transverse double-rod hydraulic cylinder. A rectangular platform is provided on the upper side of the support plate for supporting the car.

6. The chassis ball joint clearance detection structure according to claim 5, characterized in that, The support plate has several weight-reducing hollow sections.

7. The chassis ball joint clearance detection structure according to claim 2, characterized in that, The connecting frame includes a cross-shaped connecting plate. The lower side of the long side of the cross-shaped connecting plate is provided with a connecting seat for fixed connection with the output end of the longitudinal double-rod hydraulic cylinder. The upper side of the long side of the cross-shaped connecting plate is provided with a limiting seat for fixed connection with the guide crossbar. The upper side of the short side of the cross-shaped connecting plate is fixedly connected to the cylinder body of the transverse double-rod hydraulic cylinder.

8. The chassis ball joint clearance detection structure according to claim 3, characterized in that, Several elastic limiting components are provided on the outer side of the connection between the bottom frame and the fixed platform.

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