Balancing device for detecting balancing degree of automobile center plate

Abstract

The application discloses a balancing device for detecting the balance degree of a center plate of an automobile and belongs to the field of automobile detection devices.The balancing device comprises a supporting cavity, a center plate clamping cavity is symmetrically and rotationally connected to the upper surface of the supporting cavity, a transmission tooth is fixedly connected to the outer side wall of the center plate clamping cavity, a sliding groove is formed in the upper surface of the supporting cavity, a supporting sliding cavity is slidably connected to the inside of the sliding groove, and a motor one is fixedly connected to the upper surface of the supporting sliding cavity.The device is driven to rotate by a motor three in the center plate clamping cavity, the spiral track of an angle groove forces a supporting sliding column to drive a supporting clamping ring to synchronously expand / contract, different inner diameters of the center plate can be automatically adapted, and manual adjustment is not needed.When the supporting clamping ring is completely in contact with the inner ring of the center plate, a pressing wedge pushes a contact wedge to overcome the pre-tightening force of a spring two and is received in a clamping groove, so that the friction force between a hollow plate and the inner wall of a hollow cavity disappears.

Description

Technical Field

[0001] This invention relates to automotive testing devices, and more particularly to a balancing device for testing the balance of an automotive center disc. Background Technology

[0002] As a key connecting component between the wheel hub and axle, the balance of the automotive center disc directly affects the stability and safety of the vehicle. Traditional balance testing devices face several technical bottlenecks in practical applications: First, the center disc fixing structure often uses mechanical jaws or bolt clamping, requiring manual adjustment to adapt to different inner diameter specifications. This is cumbersome, has low centering accuracy, and is prone to deformation due to uneven clamping force. Second, during testing, the vibration generated by rotation often causes displacement of the support frame. Traditional limiting structures struggle to maintain stability under dynamic conditions, leading to deviations in test data. Third, the transmission system often relies on fixed gear meshing, unable to automatically adjust the meshing position according to the center disc size, and lacks overload protection mechanisms, making it easy to damage the inner ring of the center disc due to excessive pressure during clamping. Fourth, the height adjustment mechanism of the testing equipment is mostly a manual knob type, making it difficult to quickly match the testing requirements of different center disc models, resulting in low testing efficiency.

[0003] The aforementioned problems result in traditional devices having shortcomings such as insufficient accuracy, complex operation, and serious equipment wear when dealing with the detection of multi-size center plates. There is an urgent need for a new type of balancing device with adaptive adjustment, dynamic locking, and overload protection functions. Summary of the Invention

[0004] Purpose of the invention: The purpose of this invention is to solve the problems of low centering accuracy and cumbersome operation of traditional devices when testing center discs of multiple sizes by using an adaptive clamping structure and dynamic locking mechanism. Another purpose of this invention is to avoid damage to the center disc due to overpressure during the testing process by integrating overload protection and modular adjustment functions, while improving the adaptability of the device to center discs of different sizes, shortening the testing and adjustment time, improving the overall testing efficiency, and providing a reliable automated solution for automotive wheel hub balancing testing.

[0005] Technical Solution: A balancing device for testing the balance of a car's center disc, comprising a support cavity, a center disc retaining cavity symmetrically rotatably connected to the upper surface of the support cavity, a transmission gear fixedly connected to the outer wall of the center disc retaining cavity, a sliding groove formed on the upper surface of the support cavity, a support sliding cavity slidably connected inside the sliding groove, a motor one fixedly connected to the upper surface of the support sliding cavity, a transmission gear fixedly connected to the output end of the motor one, a threaded groove formed on the outer wall of the support sliding cavity, a motor two fixedly connected to the outer wall of the support cavity, a threaded post fixedly connected to the output end of the motor two, the threaded post penetrating to the left side of the inner wall of the sliding groove and threadedly connected to the outer wall of the threaded groove.

[0006] Furthermore, the outer side wall of the support cavity is symmetrically provided with limiting grooves, and a sliding block is slidably connected inside the limiting groove. The outer side wall of the sliding block is slidably connected to a support frame. The outer side wall of the support frame is provided with limiting holes, and a limiting rod is slidably connected inside the limiting holes. The outer side wall of the limiting rod is symmetrically provided with multiple positioning holes. The front sliding block is fixedly connected to the support cavity.

[0007] Furthermore, a circular groove is formed on the inner upper surface of the support frame, and a limiting cavity is rotatably connected inside the circular groove. A fixing column is fixedly connected between the limiting cavity and the transmission gear. A support rod is fixedly connected to the outer wall of the limiting rod, and the bottom end of the support rod is fixedly connected to the upper surface of the support cavity.

[0008] Furthermore, a spring groove is formed between the limiting hole and the circular groove. A locking pin is slidably connected inside the spring groove. A groove is formed on the outer side wall of the locking pin. A limiting ring is fixedly connected inside the spring groove. A spring is wound around the outer side wall of the groove. One end of the spring is fixedly connected to the limiting ring, and the other end of the spring is fixedly connected to the groove. Multiple inclined grooves are formed on the outer side wall of the limiting circular cavity. Metal balls are slidably connected inside each inclined groove.

[0009] Furthermore, the central disc cavity includes a hollow cavity, with a motor fixedly connected to the lower inner surface of the hollow cavity, and a hollow top cavity fixedly connected to the upper surface of the hollow cavity. Multiple transverse grooves are symmetrically opened on the upper inner surface of the hollow top cavity, and a supporting sliding column is slidably connected inside the transverse groove. A supporting retaining ring is symmetrically fixedly connected to the outer wall of the supporting sliding column.

[0010] Furthermore, a turntable is rotatably connected inside the hollow top cavity, and angular grooves are symmetrically opened on the upper surface of the turntable. The outer walls of the supporting sliding columns are slidably connected to the adjacent angular grooves, and the bottom ends of the supporting sliding columns are fixedly connected to limit plates.

[0011] Furthermore, a linkage rotating column is fixedly connected to the lower surface of the turntable, the bottom end of the linkage rotating column extends into the interior of the hollow cavity and is fixedly connected to a hollow disk, the hollow disk is rotatably connected to the upper surface of the interior of the hollow cavity, a slot is opened on the upper surface of the hollow disk, a slot is symmetrically opened inside the slot, a contact wedge is slidably connected inside the slot, and a spring is fixedly connected between the contact wedge and the interior of the slot.

[0012] Furthermore, the bottom end of the linkage rotating column extends into the interior of the empty groove and is rotatably connected to the lower surface of the interior of the empty groove. The outer wall of the linkage rotating column is symmetrically and fixedly connected with extrusion wedges inside the empty groove.

[0013] Furthermore, the interior of the slide groove is symmetrically provided with multiple arc-shaped grooves, one end of the supporting slide cavity is provided with a telescopic groove, an arc-shaped locking block is slidably connected inside the telescopic groove, and a spring is directly fixedly connected to the arc-shaped locking block and the telescopic groove.

[0014] Beneficial effects:

[0015] This device uses a three-drive linkage rotating column within the central disc's clamping cavity to rotate. The spiral trajectory of the angled groove forces the support sliding column to synchronously expand / contract the support clamping ring, automatically adapting to central discs of different inner diameters without manual adjustment. Once the support clamping ring is fully in contact with the inner ring of the central disc, the compression wedge pushes the contact wedge to overcome the preload of spring two and retract into the clamping groove, eliminating friction between the hollow disc and the inner wall of the hollow cavity. The motor then enters an idling state, forming an overload protection mechanism. This design controls the clamping force within a reasonable range, avoiding overpressure damage while ensuring stable fixation through the elastic preload of spring two, allowing it to withstand centrifugal force at high speeds without displacement.

[0016] An inclined groove is formed on the outer wall of the limiting cavity inside the support frame. When the motor starts and drives the transmission gear to rotate, the metal ball in the inclined groove is subjected to centrifugal force, generating a tangential component force along the inclination angle of the inclined groove. This force pushes the locking pin and simultaneously clamps the inclined groove of the limiting cavity with the inner wall of the limiting hole, forming a mechanical interlocking structure. This mechanism has speed adaptive characteristics, which can effectively resist vibration interference during the detection process and significantly improve accuracy compared with traditional rigid limiting structures.

[0017] Motor 2 drives the support slide cavity to slide within the groove via a threaded column. When the arc-shaped locking block aligns with the arc-shaped groove, spring 3 pushes the locking block to complete the positioning, minimizing the meshing error between the transmission gears and transmission teeth. Simultaneously, the limiting rod can be precisely adjusted within its height range through the positioning hole within the limiting hole, forming a stable triangular support structure with the support rod, suitable for the inspection needs of center discs of different thicknesses. This modular design significantly reduces the adjustment time when changing to center discs of different specifications, resulting in a substantial improvement in inspection efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the overall structure of the support frame of the present invention;

[0020] Figure 3 This is the invention Figure 2 A magnified structural diagram at point A;

[0021] Figure 4 This is a cross-sectional view of the limiting cavity of the present invention;

[0022] Figure 5This is a cross-sectional view of the expansion joint of the present invention;

[0023] Figure 6 This is a cross-sectional view of the central disc cavity of the present invention;

[0024] Figure 7 This is a cross-sectional view of the hollow cavity structure of the present invention;

[0025] Figure 8 This is a schematic diagram of the overall structure of the transmission gear of the present invention.

[0026] In the diagram: 1. Support cavity; 2. Central disc cavity; 3. Transmission gear; 4. Slide groove; 5. Support slide cavity; 6. Motor 1; 7. Transmission gear; 8. Threaded groove; 9. Motor 2; 10. Threaded post; 11. Limiting groove; 12. Sliding block; 13. Support frame; 14. Limiting hole; 15. Limiting rod; 16. Positioning hole; 17. Circular groove; 18. Limiting circular cavity; 19. Fixed post; 20. Supporting rod; 21. Spring groove; 22. Locking post; 23. Groove; 24. Limiting ring; 25. Spring 1; 2 6. Inclined groove; 27. Metal ball; 101. Hollow cavity; 102. Motor three; 103. Hollow top cavity; 104. Horizontal groove; 105. Support slide column; 106. Support retaining ring; 107. Turntable; 108. Angle groove; 110. Limiting plate; 111. Linkage rotating column; 112. Hollow plate; 113. Empty groove; 114. Slot; 115. Contact wedge; 116. Spring two; 117. Extrusion wedge; 28. Arc groove; 29. ​​Telescopic groove; 30. Arc retaining block; 31. Spring three. Detailed Implementation

[0027] To make the technical solution of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] Example:

[0029] like Figures 1-8As shown, a balancing device for detecting the balance of a car's center disc is provided, including a support cavity 1. A center disc retaining cavity 2 is symmetrically rotatably connected to the upper surface of the support cavity 1. A transmission gear 3 is fixedly connected to the outer wall of the center disc retaining cavity 2. A sliding groove 4 is formed on the upper surface of the support cavity 1. A support sliding cavity 5 is slidably connected inside the sliding groove 4. A motor 6 is fixedly connected to the upper surface of the support sliding cavity 5. A transmission gear 7 is fixedly connected to the output end of the motor 6. A threaded groove 8 is formed on the outer wall of the support sliding cavity 5. A motor 9 is fixedly connected to the outer wall of the support cavity 1. A threaded post 10 is fixedly connected to the output end of the motor 9. The threaded post 10 penetrates to the left side of the inner side wall of the sliding groove 4 and is threaded with the outer wall of the threaded groove 8. The support cavity 1 has a symmetrically arranged limiting groove 11 on its outer side wall. A sliding block 12 is slidably connected inside the limiting groove 11. A support frame 13 is slidably connected to the outer side wall of the sliding block 12. A limiting hole 14 is opened on the outer side wall of the support frame 13. A limiting rod 15 is slidably connected inside the limiting hole 14. Multiple positioning holes 16 are symmetrically opened on the outer side wall of the limiting rod 15. The front sliding block 12 is fixedly connected to the support cavity 5. Multiple arc-shaped grooves 28 are symmetrically opened inside the sliding groove 4. A telescopic groove 29 is opened at one end of the support cavity 5. An arc-shaped locking block 30 is slidably connected inside the telescopic groove 29. A spring 31 is directly fixedly connected to the arc-shaped locking block 30 and the telescopic groove 29.

[0030] When performing a balance test on the automotive center plate, the center plate is first placed in the center plate retaining cavity 2 for fixation. Then, motor 2 9 is started, driving the threaded column 10 to rotate. Through the threaded connection with the threaded groove 8 on the outer wall of the support slide cavity 5, the support slide cavity 5 slides in the groove 4. When the arc-shaped retaining block 30 is aligned with the arc-shaped groove 28, spring 3 31 pushes the arc-shaped retaining block 30 into the arc-shaped groove 28, completing the positioning of the support slide cavity 5. At this time, the transmission gear 7 at the output end of motor 1 6 meshes with the transmission gear 3. Then, motor 1 6 is started, and the transmission gear 7 drives the transmission gear 3 to rotate, causing the center plate retaining cavity 2 and the center plate to rotate. Then, according to the size of the center plate, the limiting rod 15 slides in the limiting hole 14, and the positioning hole 16 is used for positioning. The height of the support frame 13 is adjusted, and the balance of the rotating center plate is tested with the help of relevant testing equipment. After the test is completed, motor 2 9 continues to rotate, the support slide cavity 5 is reset, the arc-shaped retaining block 30 disengages from the arc-shaped groove 28, enters the next arc-shaped groove 28, and continues the next test.

[0031] In this embodiment, a circular groove 17 is formed on the inner upper surface of the support frame 13. A limiting cavity 18 is rotatably connected inside the circular groove 17. A fixing post 19 is fixedly connected between the limiting cavity 18 and the transmission gear 7. A support rod 20 is fixedly connected to the outer wall of the limiting rod 15. The bottom end of the support rod 20 is fixedly connected to the upper surface of the support cavity 1. A spring groove 21 is formed between the limiting hole 14 and the circular groove 17. A locking post 22 is slidably connected inside the spring groove 21. A groove 23 is formed on the outer wall of the locking post 22. A limiting ring 24 is fixedly connected inside the spring groove 21. A spring 25 is wound around the outer wall of the groove 23. One end of the spring 25 is fixedly connected to the limiting ring 24. The other end of the spring 25 is fixedly connected to the groove 23. A plurality of inclined grooves 26 are formed on the outer wall of the limiting cavity 18. A metal ball 27 is rotatably connected inside each inclined groove 26.

[0032] After the car center plate is fixed in the center plate clamping cavity 2, motor 29 drives the threaded column 10 to rotate. The supporting slide cavity 5 slides along the slide groove 4 until the arc-shaped clamping block 30 is pushed by spring 31 and clamped into the arc-shaped groove 28. At this time, the transmission gear 7 and the transmission gear 3 mesh precisely, and at the same time, the fixing column 19 drives the limiting circular cavity 18 to be pre-positioned in the circular groove 17. Motor 16 is started. At this time, the metal ball 27 in the inclined groove 26 gradually overcomes the friction of the inclined groove 26 and slides outward due to the centrifugal force. Its spherical surface generates a tangential component force along the inclined groove angle, pushing the locking column 22 to press against the side wall of the limiting hole 14. At this time, spring 125 is in a compressed state, and the centrifugal force of the metal ball and the spring force form a dynamic balance, so that the locking column simultaneously clamps the inclined groove of the limiting circular cavity and the inner wall of the limiting hole, forming a mechanical interlocking structure. This centrifugal force driven locking mechanism increases the locking stiffness as the rotation speed increases, ensuring that the support frame 13 is not affected by vibration during the detection process and achieving accurate positioning under dynamic working conditions.

[0033] In this embodiment, the central disc cavity 2 includes a hollow cavity 101. A motor 102 is fixedly connected to the lower inner surface of the hollow cavity 101. A hollow top cavity 103 is fixedly connected to the upper inner surface of the hollow cavity 101. A plurality of transverse grooves 104 are symmetrically formed on the upper inner surface of the hollow top cavity 103. A support slide column 105 is slidably connected inside the transverse grooves 104. A support retaining ring 106 is symmetrically fixedly connected to the outer side wall of the support slide column 105. A turntable 107 is rotatably connected inside the hollow top cavity 103. Angle grooves 108 are symmetrically formed on the upper surface of the turntable 107. The outer side wall of each support slide column 105 is slidably connected to an adjacent angle groove 108. A limit plate 110 is fixedly connected to the bottom end of each support slide column 105. The lower part of the turntable 107... A linkage rotating column 111 is fixedly connected to the surface. The bottom end of the linkage rotating column 111 extends into the interior of the hollow cavity 101 and is fixedly connected to a hollow disk 112. The hollow disk 112 is rotatably connected to the upper surface of the interior of the hollow cavity 101. A slot 113 is opened on the upper surface of the hollow disk 112. A slot 114 is symmetrically opened inside the slot 113. A contact wedge 115 is slidably connected inside the slot 114. A spring 116 is fixedly connected between the contact wedge 115 and the interior of the slot 113. The bottom end of the linkage rotating column 111 extends into the interior of the slot 113 and is rotatably connected to the lower surface of the interior of the slot 113. A pressing wedge 117 is symmetrically fixedly connected to the outer wall of the linkage rotating column 111 inside the slot 113.

[0034] When motor 3 102 is not running, the support retaining ring 106 retracts to its minimum diameter, facilitating the insertion of the center disc. When motor 3 starts and rotates clockwise, the linkage column 111 drives the turntable 107 to rotate synchronously. The angle groove 108 forces the support sliding column 105 to slide outward along the transverse groove 104, gradually increasing the diameter of the support retaining ring 106. Once the support retaining ring is fully in contact with the inner ring of the center disc, motor 3 102 continues to rotate, pushing the compression wedge 117 to push the contact wedge 115 to overcome the preload of spring 2 and retract into the retaining groove 114. The friction between the hollow disc 112 and the inner wall of the hollow cavity 101 disappears, and the motor enters an idling state, forming overload protection to prevent excessive pressure damage to the inner ring of the center disc. At this time, the clamping force is maintained only by spring 116, which ensures a stable fixation without exceeding the material yield strength. This mechanism achieves four functions through mechanical linkage: the spiral trajectory of the angle groove 108 causes the support retaining ring to expand / contract synchronously; the frictional locking between the contact wedge and the inner wall of the hollow cavity provides high-precision centering; the entire process is achieved by one-button clamping / unloading through the forward and reverse rotation of the motor, which is suitable for center discs of various inner diameters and provides a reliable guarantee for the balance test of automobile wheel hubs.

[0035] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A balancing device for detecting the balance of a car's center disc, comprising a support cavity (1), characterized in that: The upper surface of the support cavity (1) is symmetrically rotatably connected to a central disc cavity (2). A transmission gear (3) is fixedly connected to the outer wall of the central disc cavity (2). A sliding groove (4) is provided on the upper surface of the support cavity (1). A support sliding cavity (5) is slidably connected inside the sliding groove (4). A motor (6) is fixedly connected to the upper surface of the support sliding cavity (5). A transmission gear (7) is fixedly connected to the output end of the motor (6). A threaded groove (8) is provided on the outer wall of the support sliding cavity (5). A motor (9) is fixedly connected to the outer wall of the support cavity (1). A threaded column (10) is fixedly connected to the output end of the motor (9). The threaded post (10) penetrates to the left side of the inner wall of the slide groove (4) and is threadedly connected to the outer wall of the threaded groove (8). The central disc cavity (2) includes a hollow cavity (101). A motor (102) is fixedly connected to the lower inner surface of the hollow cavity (101). A hollow top cavity (103) is fixedly connected to the upper surface of the hollow cavity (101). Multiple transverse grooves (104) are symmetrically opened on the upper inner surface of the hollow top cavity (103). A support slide post (105) is slidably connected inside the transverse groove (104). A support retaining ring (106) is symmetrically fixedly connected to the outer wall of the support slide post (105). A turntable (107) is rotatably connected inside the hollow top cavity (103). Angle grooves (108) are symmetrically formed on the upper surface of the turntable (107). The outer walls of the supporting sliding columns (105) are slidably connected to the adjacent angle grooves (108). The bottom ends of the supporting sliding columns (105) are fixedly connected to limit plates (110). A linkage rotating column (111) is fixedly connected to the lower surface of the turntable (107). The bottom end of the linkage rotating column (111) extends into the interior of the hollow cavity (101) and is fixedly connected to a hollow disk (112). The hollow disk (112) rotates with the upper surface of the interior of the hollow cavity (101). The hollow disc (112) has a slot (113) on its upper surface. The slot (113) has symmetrical slots (114) inside. The slots (114) have a sliding contact wedge (115) inside. The contact wedge (115) is fixedly connected to the inside of the slot (113) with a spring (116). The bottom end of the linkage rotating column (111) extends into the inside of the slot (113) and is rotatably connected to the lower surface of the inside of the slot (113). The outer wall of the linkage rotating column (111) is symmetrically fixedly connected to a pressing wedge (117) inside the slot (113).

2. The balancing device for detecting the balance of an automobile center plate according to claim 1, characterized in that: The outer side wall of the support cavity (1) is symmetrically provided with limiting grooves (11), and a sliding block (12) is slidably connected inside the limiting groove (11). The outer side wall of the sliding block (12) is slidably connected to a support frame (13). The outer side wall of the support frame (13) is provided with limiting holes (14), and a limiting rod (15) is slidably connected inside the limiting hole (14). The outer side wall of the limiting rod (15) is symmetrically provided with multiple positioning holes (16). The front sliding block (12) is fixedly connected to the support cavity (5).

3. The balancing device for detecting the balance of a car's center disc according to claim 2, characterized in that: The upper inner surface of the support frame (13) is provided with a circular groove (17), and a limiting circular cavity (18) is rotatably connected inside the circular groove (17). A fixing column (19) is fixedly connected between the limiting circular cavity (18) and the transmission gear (7). A support rod (20) is fixedly connected to the outer wall of the limiting rod (15), and the bottom end of the support rod (20) is fixedly connected to the upper surface of the support cavity (1).

4. The balancing device for detecting the balance of a car's center disc according to claim 2, characterized in that: A spring groove (21) is provided between the limiting hole (14) and the circular groove (17). A locking pin (22) is slidably connected inside the spring groove (21). A groove (23) is provided on the outer side wall of the locking pin (22). A limiting ring (24) is fixedly connected inside the spring groove (21). A spring (25) is wound around the outer side wall of the groove (23). One end of the spring (25) is fixedly connected to the limiting ring (24), and the other end of the spring (25) is fixedly connected to the groove (23). A plurality of inclined grooves (26) are provided on the outer side wall of the limiting circular cavity (18). A metal ball (27) is slidably connected inside each inclined groove (26).

5. The balancing device for detecting the balance of a car's center plate according to claim 1, characterized in that: The sliding groove (4) has multiple arc-shaped grooves (28) symmetrically opened inside. One end of the supporting sliding cavity (5) has a telescopic groove (29). An arc-shaped locking block (30) is slidably connected inside the telescopic groove (29). A spring (31) is directly fixedly connected to the arc-shaped locking block (30) and the telescopic groove (29).

Images