Tire balancing machine for automobile hub detection

Abstract

The invention belongs to the technical field of automobile tire detection, and particularly relates to a tire balancing machine for automobile hub detection, which comprises a detection table, the top of the detection table is provided with a console, the detection table is internally provided with a mounting cavity, and one side of the mounting cavity is vertically and rotatably inserted with a detection shaft. An insertion hole is formed in the end, located in the mounting cavity, of the detection shaft, a pushing assembly is connected to the end, close to the insertion hole, of the detection shaft, the part, located in the mounting cavity, of the detection shaft is slidably sleeved with a belt wheel, the belt wheel is rotationally sleeved with a fixing plate, and the fixing plate is fixedly connected with the inner wall of the top of the mounting cavity. According to the invention, through the arrangement of the pushing assembly, after a wide tire is detected, the electric telescopic rod can be started, so that the tire and the detection shaft are pushed to move in the direction far away from the detection table through the pushing force of the electric telescopic rod to the push rod, the distance between the tire and the detection table is increased, and the installation of a balance block on the tire is more convenient.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile tire detection, and in particular relates to a tire balancing machine for automobile wheel hub detection. Background Art

[0002] The wheel of a car is a whole composed of tires and wheel hubs. However, due to manufacturing reasons, the mass distribution of each part of the whole cannot be very uniform. When the car wheel rotates at high speed, it will form a dynamic imbalance state, causing the wheel to shake and the steering wheel to vibrate while the vehicle is driving. In order to avoid this phenomenon or eliminate this phenomenon that has already occurred, it is necessary to add counterweights to the wheel in a dynamic state to correct the balance of each edge part of the wheel. This correction process is what people often call dynamic balancing.

[0003] When performing dynamic balancing tests on existing automobile tires, the tires need to be fixed to the detection shaft of the dynamic balancing machine. When the test is completed, as the detection shaft stops, the tire needs to be weighted at the position corresponding to the position directly below the detection shaft. At this time, a weight of a specified gram can be installed on the wheel hub. However, when installing the weight, for some large-sized tires, due to the wide tires, the tires are too close to the dynamic balancing machine, making it inconvenient to install the weight. In addition, since the existing detection shafts generally do not have a self-locking function, the tire may be accidentally touched when the weight is installed, resulting in a change in the installation position of the wheel hub, which in turn affects the effect of subsequent tire dynamic balancing calibration.

[0004] Therefore, it is necessary to invent a tire balancing machine for automobile wheel hub detection to solve the above problems. Summary of the invention

[0005] In view of the above problems, the present invention provides a tire balancing machine for automobile wheel hub detection to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a tire balancing machine for automobile wheel hub detection, comprising a detection platform, a control panel is installed on the top of the detection platform, a mounting cavity is arranged inside the detection platform, a detection shaft is inserted and inserted vertically and rotatably through one side of the mounting cavity, a socket is provided at one end of the detection shaft located in the mounting cavity, and a pushing component is connected to the end of the detection shaft close to the socket, a pulley is slidably sleeved on the part of the detection shaft located in the mounting cavity, a fixed plate is rotatably sleeved on the outside of the pulley, the fixed plate is fixedly connected to the top inner wall of the mounting cavity, and the bottom of the pulley is horizontally A mounting plate is provided, which is fixedly connected to the inner wall of the side of the mounting cavity, a driving motor is installed on the top of the mounting plate, a driving belt is drivingly connected between the output shaft of the driving motor and the pulley, a clamping assembly is provided between the pushing assembly and the pulley, a portion of the detection shaft located outside the mounting cavity is sleeved with a conical block and a locking sleeve, the conical block is fixedly connected to the detection shaft, the locking sleeve is threadedly connected to the detection shaft, and the conical block is closer to the detection platform than the locking sleeve, a tire to be detected is provided between the locking sleeve and the conical block, and the tire is sleeved on the detection shaft.

[0007] Furthermore, the pushing assembly includes a push rod, which is slidably inserted in the socket of the detection shaft, and the end of the push rod away from the detection shaft is rotatably sleeved with a bearing, and a coaxial electric telescopic rod is provided on the side of the bearing away from the detection shaft, and the electric telescopic rod is vertically fixedly connected to the inner wall of the side of the installation cavity, and one end of the electric telescopic rod close to the bearing is fixedly connected to two U-shaped connecting plates, and the two connecting plates are cross-fixed together, and both ends of the connecting plate are fixedly connected to the outer ring of the bearing.

[0008] Furthermore, the clamping assembly includes an arc-shaped clamping plate, which is located at the top of the detection shaft and is coaxial with the detection shaft. A slider is fixedly connected to the top of the clamping plate, and the slider is slidably installed on the top inner wall of the installation cavity. A limit rod is vertically slidably inserted through the two sides of the slider, one end of the limit rod is fixedly connected to the fixed plate, and the other end of the limit rod is fixedly connected to a fixed block, and the fixed block is fixedly connected to the top of the installation cavity. A clamping spring is fixedly connected between the slider and the fixed plate, and the clamping spring is sleeved on the limit rod. A clamping disk is provided on the side of the clamping plate close to the electric telescopic rod, and the clamping disk is fixedly sleeved on the push rod. The clamping disk and the clamping plate are located on the same motion trajectory, and the two can contact each other.

[0009] Furthermore, a fixing rod is horizontally arranged at the bottom of the tire, and the fixing rod slides vertically and is inserted into a side of the test platform close to the tire, and one end of the fixing rod located in the installation cavity is vertically fixedly connected to a connecting rod, and the top of the connecting rod is fixedly connected to the outer side of the bearing, and a movable rod is slidably inserted into the end of the connecting rod close to the tire, and a first locking screw is vertically threadedly inserted into the surface of the fixing rod close to one end of the movable rod, and the first locking screw can press the movable rod, and a vertical strip is hingedly connected to the end of the movable rod close to the tire, and a fixing ring is fixedly connected to the side of the strip close to the tire, a marking pen is vertically inserted in the fixing ring, and a second locking screw is threadedly inserted into the side of the fixing ring, and the second locking screw can press the marking pen, and a push rod is hingedly connected to the bottom end of the strip, and the end of the push rod away from the strip is slidably sleeved with a sleeve, and the end of the sleeve away from the push rod is hinged to the bottom surface of the movable rod, and a return spring is connected between the end of the push rod located in the sleeve and the inner wall of the sleeve.

[0010] Furthermore, two ends of the return spring are fixedly connected to the push rod and the inner wall of the sleeve respectively, and in an initial state, the length of the return spring is equal to half the length of the sleeve.

[0011] Furthermore, a rubber pad is fixedly connected to one side of the pressing plate close to the pressing disc, and the size of the rubber pad matches the size of the side surface of the pressing plate.

[0012] Furthermore, a protective cover is arranged on the periphery of the upper half of the tire, and the rear side of the protective cover is rotatably connected to the side of the detection platform.

[0013] Furthermore, an inspection port communicating with the installation cavity is provided on the front side of the inspection platform, and a cover plate is detachably installed at the inspection port.

[0014] Furthermore, a part of the detection shaft located outside the installation cavity is movably sleeved with a support seat, and the support seat is fixedly connected to the side of the detection platform.

[0015] Technical effects and advantages of the present invention:

[0016] 1. The present invention is provided with a pushing assembly. After the wider tire is tested, the electric telescopic rod can be started, so that the tire and the test axis can be pushed away from the test platform by the thrust of the electric telescopic rod on the push rod, thereby increasing the distance between the tire and the test platform, thereby making it easier to install the balance block on the tire.

[0017] 2. The present invention is provided with a clamping plate. When the detection shaft moves away from the detection platform, when the clamping plate contacts the clamping plate, as the push rod continues to move, the clamping plate can gradually squeeze the clamping plate, thereby limiting the detection shaft through the friction between the clamping plate and the clamping plate, thereby ensuring that the tire does not rotate when the balancing block is installed, thereby improving the final calibration effect of the tire dynamic balance;

[0018] 3. The present invention is provided with a marking pen. During the movement of the detection axis, the tip of the marking pen can slide along the bottom of the side of the tire, thereby leaving a mark on the bottom of the side of the tire, thereby facilitating the detection personnel to more accurately locate the installation position of the balance block and improving the calibration effect of the dynamic balance of the tire. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a three-dimensional schematic diagram of all structures of the present invention except the cover plate;

[0021] Figure 3 It is a three-dimensional schematic diagram of structures such as a detection platform, a pushing assembly, a detection shaft, and a mounting plate in the present invention;

[0022] Figure 4 The present invention Figure 3 A magnified view of part A;

[0023] Figure 5 It is a three-dimensional schematic diagram of the fixed rod, the movable rod, the marking pen and the return spring in the present invention;

[0024] Figure 6 It is a three-dimensional schematic diagram of the detection shaft, the pushing assembly, the pulley and the fixing plate in the present invention.

[0025] In the figure: 1. test bench; 2. control panel; 3. test shaft; 4. socket; 5. push assembly; 51. push rod; 52. bearing; 53. electric telescopic rod; 54. connecting plate; 6. pulley; 7. fixing plate; 8. mounting plate; 9. driving motor; 10. driving belt; 11. clamping assembly; 111. clamping plate; 112. slider; 113. limit rod; 114. clamping spring; 115. clamping disk; 12. conical stopper; 13. locking sleeve; 14. tire; 15. fixing rod; 16. connecting rod; 17. movable rod; 18. first locking screw; 19. strip; 20. fixing ring; 21. marking pen; 22. second locking screw; 23. ejector rod; 24. sleeve; 25. reset spring; 26. rubber pad; 27. protective cover; 28. cover plate; 29. ​​support seat. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0027] The present invention provides Figures 1 to 6 A tire balancing machine for automobile wheel hub detection shown in the figure comprises a detection platform 1, a control panel 2 is installed on the top of the detection platform 1, a mounting cavity is arranged inside the detection platform 1, a detection shaft 3 is inserted and inserted vertically and rotatably through one side of the mounting cavity, a socket 4 is provided at one end of the detection shaft 3 located in the mounting cavity, and a pushing component 5 is connected to the end of the detection shaft 3 close to the socket 4, a pulley 6 is slidably sleeved on the part of the detection shaft 3 located in the mounting cavity, a fixing plate 7 is rotatably sleeved on the outside of the pulley 6, the fixing plate 7 is fixedly connected to the top inner wall of the mounting cavity, a mounting plate 8 is horizontally arranged on the bottom of the pulley 6, and the mounting plate 8 is connected to the side of the mounting cavity The inner wall of the surface is fixedly connected, a driving motor 9 is installed on the top of the mounting plate 8, a driving belt 10 is connected between the output shaft of the driving motor 9 and the pulley 6, a clamping assembly 11 is arranged between the pushing assembly 5 and the pulley 6, a conical stopper 12 and a locking sleeve 13 are sleeved on the part of the detection shaft 3 located outside the mounting cavity, the conical stopper 12 is fixedly connected to the detection shaft 3, the locking sleeve 13 is threadedly connected to the detection shaft 3, and the conical stopper 12 is closer to the detection platform 1 than the locking sleeve 13, a tire 14 to be detected is arranged between the locking sleeve 13 and the conical stopper 12, and the tire 14 is sleeved on the detection shaft 3;

[0028] Before the dynamic balance test of the tire 14 is performed, the tire 14 is sleeved on the test shaft 3, and then the locking sleeve 13 is screwed on, so that the locking sleeve 13 and the conical stopper 12 can be used to clamp the tire 14 to achieve the connection operation between the tire 14 and the test shaft 3. When the dynamic balance test of the tire 14 is performed, the driving motor 9 is started through the control console 2, so that the driving motor 9 drives the pulley 6 to rotate through the transmission belt 10, and as the pulley 6 rotates, the test shaft 3 can drive the tire 14 to rotate under the action of the pulley 6, thereby achieving the dynamic balance test operation of the tire 14;

[0029] After the dynamic balancing test is performed on the wider tire 14, as the driving motor 9 stops, the detection shaft 3 and the tire 14 also stop rotating. At this time, the pushing assembly 5 is started to push the detection shaft 3 and the tire 14 together in a direction away from the testing platform 1, so that the distance between the tire 14 and the testing platform 1 gradually increases, thereby making it easier to install the balancing block on the tire 14.

[0030] During the movement of the detection shaft 3 and the tire 14, the clamping assembly 11 can gradually restrict the detection shaft 3, thereby preventing the detection shaft 3 and the tire 14 from rotating during the installation of the balancing block, thereby ensuring the accuracy of the installation position of the balancing block and improving the final calibration effect of the dynamic balance of the tire 14.

[0031] like Figure 2 , Figure 3 and 6 As shown, the pushing assembly 5 includes a push rod 51, which is slidably inserted into the socket 4 of the detection shaft 3, and the end of the push rod 51 away from the detection shaft 3 is rotatably sleeved with a bearing 52, and a coaxial electric telescopic rod 53 is arranged on the side of the bearing 52 away from the detection shaft 3, and the electric telescopic rod 53 is vertically fixedly connected to the inner wall of the side of the installation cavity, and one end of the electric telescopic rod 53 close to the bearing 52 is fixedly connected to two U-shaped connecting plates 54, and the two connecting plates 54 are cross-fixedly connected together, and both ends of the connecting plate 54 are fixedly connected to the outer ring of the bearing 52;

[0032] The clamping assembly 11 includes an arc-shaped clamping plate 111, which is located at the top of the detection shaft 3 and is coaxial with the detection shaft 3. A slider 112 is fixedly connected to the top of the clamping plate 111, and the slider 112 is slidably installed on the top inner wall of the installation cavity. A limit rod 113 is vertically slidably inserted through the two sides of the slider 112. One end of the limit rod 113 is fixedly connected to the fixing plate 7, and the other end of the limit rod 113 is fixedly connected to a fixing block, and the fixing block is fixedly connected to the top of the installation cavity. A clamping spring 114 is fixedly connected between the slider 112 and the fixing plate 7, and the clamping spring 114 is sleeved on the limit rod 113. A clamping disc 115 is provided on the side of the clamping plate 111 close to the electric telescopic rod 53, and the clamping disc 115 is fixedly sleeved on the push rod 51. The clamping disc 115 and the clamping plate 111 are located on the same motion trajectory, and the two can contact each other.

[0033] When the driving motor 9 drives the detection shaft 3 to rotate through the transmission belt 10, the push rod 51 can rotate with the detection shaft 3, while the electric telescopic rod 53 can remain stationary. After the detection operation of the wider tire 14 is completed, as the driving motor 9 stops, the detection shaft 3 and the tire 14 also stop. Then the electric telescopic rod 53 is started to push the bearing 52 and the push rod 51 to move together through the connecting plate 54. In this process, when one end of the push rod 51 located in the socket 4 contacts the hole wall of the socket 4 on the side close to the pulley 6, as the electric telescopic rod 53 continues to extend, the detection shaft 3 can be pushed by the push rod 51 to drive the tire 14 to move away from the detection platform 1. As the tire 14 moves, the distance between the tire 14 and the detection platform 1 gradually increases, so that the operator can install the balance block more conveniently.

[0034] During the movement of the push rod 51, the clamping plate 115 on the push rod 51 gradually approaches the clamping plate 111. When the clamping plate 115 contacts the clamping plate 111, as the push rod 51 continues to move, the clamping plate 111 can be gradually squeezed by the clamping plate 111. As the clamping plate 111 moves, the slider 112 can be driven by the clamping plate 111 and gradually compress the clamping spring 114 along the limit rod 113. The reaction force of the clamping spring 114 on the clamping plate 111 can make the clamping plate 111 tightly pressed together with the clamping plate 115, so that the detection shaft 3 is limited by the friction force between the clamping plate 115 and the clamping plate 111, thereby ensuring that the tire 14 does not rotate when the balancing block is installed, thereby improving the final calibration effect of the dynamic balance of the tire 14.

[0035] like Figure 1 , Figure 2 and Figure 5As shown, a fixing rod 15 is horizontally arranged at the bottom of the tire 14, and the fixing rod 15 slides vertically and penetrates and is inserted into a side of the test platform 1 close to the tire 14. One end of the fixing rod 15 located in the installation cavity is vertically fixedly connected with a connecting rod 16, and the top of the connecting rod 16 is fixedly connected to the outside of the bearing 52. A movable rod 17 is slidably inserted into the end of the connecting rod 16 close to the tire 14, and a first locking screw 18 is vertically threadedly inserted into the surface of the fixing rod 15 close to one end of the movable rod 17, and the first locking screw 18 can press the movable rod 17, and a vertical strip 19 is hinged at one end of the movable rod 17 close to the tire 14, and the top of the strip 19 is fixedly connected to the side of the tire 14. There is a fixing ring 20, in which a marking pen 21 is vertically inserted, a second locking screw 22 is threadedly inserted on the side of the fixing ring 20, and the second locking screw 22 can press the marking pen 21, a top rod 23 is hinged at the bottom end of the strip 19, and a sleeve 24 is slidably sleeved at one end of the top rod 23 away from the strip 19, and the sleeve 24 is hinged to the bottom surface of the movable rod 17 at one end away from the top rod 23, and a return spring 25 is connected between the end of the top rod 23 located in the sleeve 24 and the inner wall of the sleeve 24, and the two ends of the return spring 25 are respectively fixedly connected to the top rod 23 and the inner wall of the sleeve 24, and in the initial state, the length of the return spring 25 is equal to half the length of the sleeve 24;

[0036] By providing a marker pen 21, when performing a dynamic balance test on the tire 14, first lock the tire 14 on the test shaft 3 through the locking sleeve 13, then insert the marker pen 21 into the fixing ring 20 and adjust the height of the top of the marker pen 21 so that the tip of the marker pen 21 is higher than the bottom of the tire 14, then turn the second locking screw 22 to press and fix the adjusted marker pen 21, then pull the movable rod 17 to move it in the direction close to the tire 14, when the distance between the marker pen 21 and the tire 14 is less than the depth of the insertion hole 4, turn the first locking screw 18 to press and fix the movable rod 17, at this time, the marker pen 21 can be located on the side of the tire 14, and in the process of the test shaft 3 driving the tire 14 to perform a dynamic balance test, the marker pen 21 can be kept separated from the tire 14, when the test is completed, as the electric telescopic rod 53 pushes the push rod 51 to move in the direction close to the test shaft 3, the connecting rod 16 can drive the fixing rod 15 and The movable rod 17 moves together in the direction approaching the tire 14. During this process, the marker pen 21 can gradually contact the bottom of the tire 14 under the drive of the movable rod 17. When the marker pen 21 contacts the side of the tire 14, as the movable rod 17 continues to move, the top of the marker pen 21 can deflect in the direction away from the tire 14 under the obstruction of the tire 14. During this process, the fixing ring 20 and the strip 19 can deflect together under the drive of the marker pen 21, and as the strip 19 deflects, the top rod 23 can gradually stretch the reset spring 25 under the pull of the strip 19, and as the marker pen 21 continues to deflect, when the top of the marker pen 21 fits against the bottom of the side of the tire 14, at this time, as the movable rod 17 continues to move, the tip of the marker pen 21 can slide against the bottom of the side of the tire 14, thereby leaving a mark on the bottom of the side of the tire 14, thereby facilitating the inspection personnel to more accurately locate the installation position of the balance block and improve the calibration effect of the dynamic balance of the tire 14.

[0037] like Figure 3 and Figure 4 As shown, a rubber pad 26 is fixedly connected to one side of the pressing plate 111 close to the pressing disc 115, and the size of the rubber pad 26 matches the size of the side of the pressing plate 111;

[0038] By providing the rubber pad 26 , when the clamping plate 111 and the clamping disc 115 are fitted together, the rubber pad 26 can increase the friction between the clamping plate 111 and the clamping disc 115 , thereby ensuring that the detection shaft 3 can better maintain a stationary state under the cooperation of the clamping disc 115 and the clamping plate 111 .

[0039] like Figure 1 and Figure 2 As shown, a protective cover 27 is provided on the periphery of the upper half of the tire 14, and the rear side of the protective cover 27 is rotatably connected to the side of the testing platform 1;

[0040] By providing the protective cover 27 , when the tire 14 is subjected to a dynamic balance test, the protective cover 27 can be covered on the upper half of the tire 14 , thereby preventing a person from accidentally touching the tire 14 during the test.

[0041] like Figures 1 to 3 As shown, the front side of the testing platform 1 is provided with an inspection port connected to the installation cavity, and a cover plate 28 is detachably installed at the inspection port;

[0042] By providing the inspection port, when the testing platform 1 fails, the cover plate 28 can be removed, thereby conveniently inspecting the internal structure of the testing platform 1.

[0043] like Figures 1 to 3 As shown, the part of the detection shaft 3 outside the installation cavity is movably sleeved with a support seat 29, and the support seat 29 is fixedly connected to the side of the detection platform 1;

[0044] By providing the support seat 29 , when the detection shaft 3 drives the tire 14 to rotate, the support seat 29 can support the detection shaft 3 close to the detection platform 1 , thereby improving the stability of the detection shaft 3 during rotation.

[0045] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them.

Claims

1. A tire balancing machine for automobile wheel hub detection, comprising a detection platform (1), characterized in that: A control console (2) is installed on the top of the detection platform (1), and an installation cavity is arranged inside the detection platform (1). A detection shaft (3) is inserted and inserted vertically and rotatably through one side of the installation cavity. A plug hole (4) is provided at one end of the detection shaft (3) located in the installation cavity, and a pushing component (5) is connected to the end of the detection shaft (3) close to the plug hole (4). A pulley (6) is slidably sleeved on the part of the detection shaft (3) located in the installation cavity, and a fixing plate (7) is rotatably sleeved on the outside of the pulley (6). The fixing plate (7) is fixedly connected to the top inner wall of the installation cavity. A mounting plate (8) is horizontally arranged at the bottom of the pulley (6), and the mounting plate (8) is fixedly connected to the side inner wall of the installation cavity. The top of the mounting plate (8) is A driving motor (9) is installed in the part, a driving belt (10) is connected between the output shaft of the driving motor (9) and the pulley (6), a pressing assembly (11) is arranged between the pushing assembly (5) and the pulley (6), a conical stopper (12) and a locking sleeve (13) are sleeved on the part of the detection shaft (3) located outside the installation cavity, the conical stopper (12) and the detection shaft (3) are fixedly connected together, the locking sleeve (13) and the detection shaft (3) are threadedly connected together, and the conical stopper (12) is closer to the detection platform (1) than the locking sleeve (13), a tire (14) to be detected is arranged between the locking sleeve (13) and the conical stopper (12), and the tire (14) is sleeved on the detection shaft (3).

2. A tire balancing machine for automobile wheel hub detection according to claim 1, characterized in that: The pushing assembly (5) comprises a push rod (51), the push rod (51) is slidably inserted into the socket (4) of the detection shaft (3), the end of the push rod (51) away from the detection shaft (3) is rotatably sleeved with a bearing (52), a side of the bearing (52) away from the detection shaft (3) is provided with a coaxial electric telescopic rod (53), the electric telescopic rod (53) is vertically fixedly connected to the inner wall of the side of the installation cavity, one end of the electric telescopic rod (53) close to the bearing (52) is fixedly connected to two U-shaped connecting plates (54), and the two connecting plates (54) are cross-fixedly connected together, and both ends of the connecting plate (54) are fixedly connected to the outer ring of the bearing (52).

3. A tire balancing machine for automobile wheel hub detection according to claim 2, characterized in that: The clamping assembly (11) comprises an arc-shaped clamping plate (111), the clamping plate (111) is located at the top of the detection shaft (3), and the clamping plate (111) is coaxial with the detection shaft (3), the top of the clamping plate (111) is fixedly connected with a slider (112), the slider (112) is slidably mounted on the top inner wall of the installation cavity, and a limit rod (113) is vertically slidably inserted and penetrated between the two sides of the slider (112), one end of the limit rod (113) is fixedly connected to the fixed plate (7), and the limit rod (113) is fixedly connected to the fixed plate (7). A fixed block is fixedly connected to the other end, and the fixed block is fixedly connected to the top of the installation cavity. A compression spring (114) is fixedly connected between the slider (112) and the fixed plate (7), and the compression spring (114) is sleeved on the limit rod (113). A compression plate (115) is provided on the side of the compression plate (111) close to the electric telescopic rod (53), and the compression plate (115) is fixedly sleeved on the push rod (51). The compression plate (115) and the compression plate (111) are located on the same motion trajectory, and the two can contact each other.

4. A tire balancing machine for automobile wheel hub detection according to claim 2, characterized in that: A fixing rod (15) is horizontally arranged at the bottom of the tire (14), and the fixing rod (15) is vertically slidably inserted into a side of the test platform (1) close to the tire (14). One end of the fixing rod (15) located in the installation cavity is vertically fixedly connected to a connecting rod (16), and the top end of the connecting rod (16) is fixedly connected to the outer side of the bearing (52). A movable rod (17) is slidably inserted into the end of the connecting rod (16) close to the tire (14). A first locking screw (18) is vertically threadedly inserted into the surface of the fixing rod (15) close to one end of the movable rod (17), and the first locking screw (18) can press the movable rod (17). The movable rod (17) is hinged with a vertical A strip (19), wherein a fixing ring (20) is fixedly connected to the top of the strip (19) on one side close to the tire (14), a marking pen (21) is vertically inserted in the fixing ring (20), a second locking screw (22) is threadedly inserted in the side of the fixing ring (20), and the second locking screw (22) can press the marking pen (21), a top rod (23) is hinged at the bottom end of the strip (19), an end of the top rod (23) away from the strip (19) is slidably sleeved with a sleeve (24), an end of the sleeve (24) away from the top rod (23) is hinged to the bottom surface of the movable rod (17), and a return spring (25) is connected between the end of the top rod (23) located in the sleeve (24) and the inner wall of the sleeve (24).

5. A tire balancing machine for automobile wheel hub detection according to claim 4, characterized in that: The two ends of the return spring (25) are respectively fixedly connected to the push rod (23) and the inner wall of the sleeve (24), and in an initial state, the length of the return spring (25) is equal to half the length of the sleeve (24).

6. The tire balancing machine for automobile wheel hub detection according to claim 3, characterized in that: A rubber pad (26) is fixedly connected to one side of the pressing plate (111) close to the pressing disc (115), and the size of the rubber pad (26) matches the size of the side of the pressing plate (111).

7. The tire balancing machine for automobile wheel hub detection according to claim 1, characterized in that: A protective cover (27) is arranged on the periphery of the upper half of the tire (14), and the rear side of the protective cover (27) is rotatably connected to the side of the detection platform (1).

8. The tire balancing machine for automobile wheel hub detection according to claim 7, characterized in that: The front side of the inspection platform (1) is provided with an inspection opening which is in communication with the installation cavity, and a cover plate (28) is detachably installed at the inspection opening.

9. A tire balancing machine for automobile wheel hub detection according to claim 8, characterized in that: The part of the detection shaft (3) located outside the installation cavity is movably sleeved with a support seat (29), and the support seat (29) is fixedly connected to the side of the detection platform (1).

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