A centering and discharging rotating device for hub dynamic balance detection

Abstract

The utility model discloses a kind of centering and discharging rotation devices for wheel hub dynamic balance detection, including bottom frame, the front part of the top plate of bottom frame is fixed with middle support frame, middle support frame is inserted in the middle part of the front part of the lifting plate, which is set above the top plate of bottom frame, the through slot of molding, the front part and rear part of the bottom surface of the top plate of bottom frame are fixed with lifting cylinder, the top end of the push rod of lifting cylinder protrudes the top surface of the top plate of bottom frame and fixed connecting plate, the top surface of connecting plate is fixed with second lifting cylinder;It can be installed between the two conveying frames of wheel hub processing, it can receive the wheel hub conveyed from the conveying frame in front, automatically correct it and convey to rotating sleeve and rotate with rotating sleeve, to facilitate the dynamic balance detection of rotating wheel hub by surrounding detection equipment, after completion, it can automatically convey wheel hub to the conveying frame in rear, realize automatic feeding and discharging, with good use effect, high efficiency.

Description

Technical fields:

[0001] This utility model relates to the technical field of wheel hub processing equipment, and more specifically to a centering and feeding rotating device for wheel hub dynamic balance testing. Background technology:

[0002] After the existing wheel hubs have undergone painting, the basic processing is complete. The next step is to test their dynamic balance.

[0003] The existing method involves manually placing the material onto a rotating sleeve. The rotating sleeve then drives the hub to rotate. In conjunction with laser sensors or other sensors placed around the hub, the dynamic balance generated by the hub's rotation can be detected. However, this method requires manual loading and unloading, resulting in poor performance and low efficiency, and it does not meet the needs of automated continuous detection. Utility model content:

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a centering and feeding rotary device for wheel hub dynamic balancing testing. It can be installed between two conveyor frames for wheel hub processing. It can receive wheel hubs conveyed by the front conveyor frame, automatically correct them, and convey them to a rotating sleeve, which rotates with the sleeve to facilitate the surrounding testing equipment to perform dynamic balancing testing on the rotating wheel hub. After completion, it can automatically convey the wheel hub to the rear conveyor frame, realizing automatic loading and unloading. It has good performance and high efficiency.

[0005] The solution of this utility model to the aforementioned technical problem is:

[0006] A centering and feeding rotary device for wheel hub dynamic balancing testing includes a bottom frame. A middle support frame is fixed to the middle of the front part of the top plate of the bottom frame. The middle support frame is inserted into a through groove formed in the middle of the front part of the lifting plate provided above the top plate of the bottom frame. Lifting cylinders are fixed to the front and rear parts of the left and right sides of the bottom surface of the top plate of the bottom frame. The top end of the push rod of the lifting cylinder extends out of the top surface of the top plate of the bottom frame and is fixed to a connecting plate. A second lifting cylinder is fixed to the top surface of the connecting plate. The top end of the push rod of all the second lifting cylinders is fixed to the bottom surface of the lifting plate.

[0007] The lifting plate is fixed with front-to-back extending conveying devices on its upper left and right sides, and the two conveying devices are located on the left and right sides of the middle support frame.

[0008] A rotating sleeve is movably connected to the middle of the rear top surface of the top plate of the bottom frame via a bearing. The middle of the rotating sleeve is inserted into a through hole formed in the middle of the rear of the lifting plate. The top of the rotating sleeve extends out of the top surface of the lifting plate and is fixed with a rotating sleeve for placing a wheel hub. A transmission gear ring is fixed on the lower outer wall of the rotating sleeve. A drive motor is fixed on the top surface of the top plate of the bottom frame. A drive gear is fixed on the output shaft of the drive motor and meshes with the transmission gear ring.

[0009] Side support frames are fixed to the ground on both the left and right sides of the bottom frame. Horizontal connecting plates are fixed to the upper part of the vertical plates of the two side support frames, facing the middle support frame. A main fixing block is fixed to the top surface of the horizontal connecting plate. A lower horizontal plate is fixed to the side wall of the vertical plate of the side support frame below the horizontal connecting plate. A correction drive servo motor is fixed to the bottom surface of the lower horizontal plate. The top end of the output shaft of the correction drive servo motor extends out of the top surface of the lower horizontal plate and is fixed to the main vertical shaft via a coupling. The main vertical shaft is movably connected to the main fixing block via bearings. The top of the main vertical shaft extends out of the top surface of the main fixed block and is fixed with a correction clamping arm. The main fixed block is also movably connected to a secondary vertical shaft through a bearing. The lower parts of the main vertical shaft and the lower parts of the secondary vertical shaft extend out of the bottom surface of the main fixed block and are respectively fixed with a drive gear and a transmission gear. The drive gear and the transmission gear mesh with each other. The top of the secondary vertical shaft extends out of the top surface of the main fixed block and is fixed with a correction clamping arm. The ends of the two correction clamping arms are movably connected to rubber elastic clamping posts through hinge shafts. The wheel hub to be tested is clamped between the four rubber elastic clamping posts.

[0010] A horizontal sensing plate is fixed at the lower part of the main vertical shaft. A sensing protrusion is fixed on the bottom surface of the outer side of the horizontal sensing plate. A first connecting frame is fixed on the top surface of the lower horizontal plate located outside the coupling. A first proximity switch is fixed on the first connecting frame. A second connecting frame is fixed on the top surface of the middle part of the lower horizontal plate between the main vertical shaft and the secondary vertical shaft. A second proximity switch is fixed on the second connecting frame. The first proximity switch and the second proximity switch correspond to the sensing protrusion.

[0011] The top surface of the top plate of the bottom frame is fixed with fixing blocks at the front and rear of the left and right sides. An adjusting limit bolt is screwed into the screw hole in the middle of the top surface of the fixing block. The top surface of the rotating part of the adjusting limit bolt faces the bottom surface of the lifting plate.

[0012] The bottom surface of the top plate of the rotating sleeve is fixed on the top surface of the rotating sleeve. A first cylinder is fixed in the middle of the bottom surface of the top plate of the rotating sleeve. The top of the push rod of the first cylinder is inserted into the central through hole of the top plate of the rotating sleeve. A lifting block is fixed on the top of the push rod of the first cylinder. The outer side wall of the lifting block is closely attached to the inner side wall of the self-lubricating guide sleeve fixed on the inner side wall of the central through hole.

[0013] The top surface of the lifting block is fixed with a conical clamping block that has a large bottom outer diameter and a small top outer diameter;

[0014] Multiple guide rails are fixed on the top surface of the top plate of the rotating sleeve around the central through hole. Each guide rail has an arc-shaped block inserted into it. All the arc-shaped blocks form an annular block. The inner wall of all the arc-shaped blocks is the inner wall of the annular block, which is a conical wall. The middle of the arc-shaped block is a conical through hole. The bottom surface of the arc-shaped block is formed with an elongated guide groove. The guide rail is inserted into the elongated guide groove. An elongated protrusion is formed on the inner wall of the elongated guide groove. It is inserted into the elongated guide grooves formed on the two side walls of the guide rail and cooperates with them. A stop block is fixed on the bottom surface of the outer side of the arc-shaped block. A return spring is inserted into the outer side of the elongated guide groove. One end of the spring is fixed on the inner wall of the stop block, and the other end is fixed on the outer wall of the corresponding guide rail. The upper part of the conical clamping block extends out of the top of the central through hole and is inserted into the conical through hole. Its outer wall corresponds to the conical wall of the conical through hole.

[0015] The outstanding effect of this utility model is:

[0016] Compared with existing technologies, it can be installed between two conveyor frames in wheel hub processing. It can receive wheel hubs from the front conveyor frame, automatically correct them, and transport them to the rotating sleeve, where they rotate with the rotating sleeve. This facilitates the surrounding testing equipment to perform dynamic balance testing on the rotating wheel hubs. After completion, it can automatically transport the wheel hubs to the rear conveyor frame, achieving automatic loading and unloading. It has good performance and high efficiency. Attached image description:

[0017] Figure 1 This is a partial top view of the present invention;

[0018] Figure 2 This is a partial sectional view of the present invention;

[0019] Figure 3 yes Figure 2 A magnified view of a portion of the image;

[0020] Figure 4 yes Figure 2 A magnified view of another part;

[0021] Figure 5 This is a partial structural diagram of the side support frame;

[0022] Figure 6 This is a partial structural diagram of the main fixing block. Detailed implementation method:

[0023] For example, see below. Figures 1 to 6As shown, a centering and feeding rotary device for wheel hub dynamic balancing testing includes a bottom frame 10. A middle support frame 11 is fixed to the middle of the front part of the top plate of the bottom frame 10. The middle support frame 11 is inserted into a through groove 21 formed in the middle of the front part of the lifting plate 20 provided above the top plate of the bottom frame 10. Lifting cylinders 12 are fixed to the front and rear parts of the left and right sides of the bottom surface of the top plate of the bottom frame 10. The top end of the push rod of the lifting cylinder 12 extends out of the top surface of the top plate of the bottom frame 10 and is fixed to a connecting plate. A second lifting cylinder 13 is fixed to the top surface of the connecting plate. The top ends of the push rods of all the second lifting cylinders 13 are fixed to the bottom surface of the lifting plate 20.

[0024] The lifting plate 20 is fixed with front-to-back extending conveying devices on the left and right sides above it, and the two conveying devices are located on the left and right sides of the middle support frame 11.

[0025] A rotating sleeve 30 is movably connected to the middle of the rear part of the top plate of the bottom frame 10 via a bearing. The middle part of the rotating sleeve 30 is inserted into the through hole formed in the middle of the rear part of the lifting plate 20. The top end of the rotating sleeve 30 extends out of the top surface of the lifting plate 20 and is fixed with a rotating sleeve 40 for placing the hub 100. A transmission gear ring 31 is fixed on the lower outer side wall of the rotating sleeve 30. A drive motor 14 is fixed on the top surface of the top plate of the bottom frame 10. A drive gear 15 is fixed on the output shaft of the drive motor 14 and meshes with the transmission gear ring 31.

[0026] Furthermore, side support frames 50 are fixed to the ground on both the left and right sides of the bottom frame 10. Horizontal connecting plates 51 are fixed to the upper part of the vertical plates of the two side support frames 50 facing the middle support frame 11. A main fixing block 52 is fixed to the top surface of the horizontal connecting plate 51. A lower horizontal plate is fixed to the side wall of the vertical plate of the side support frame 50 below the horizontal connecting plate 51. A correction drive servo motor 53 is fixed to the bottom surface of the lower horizontal plate. The top end of the output shaft of the correction drive servo motor 53 extends out of the top surface of the lower horizontal plate and is fixed to the main vertical shaft 54 ​​via a coupling. The main vertical shaft 54 ​​is movably connected to the main fixing block 52 via bearings. The top of shaft 54 ​​extends out of the top surface of main fixing block 52 and is fixed with a correction clamping arm 55. A secondary vertical shaft 56 is also movably connected to the main fixing block 52 via bearings. The lower parts of main vertical shaft 54 ​​and secondary vertical shaft 56 extend out of the bottom surface of main fixing block 52 and are respectively fixed with drive gear 57 and transmission gear 58. Drive gear 57 and transmission gear 58 mesh with each other. The top of secondary vertical shaft 56 extends out of the top surface of main fixing block 52 and is fixed with a correction clamping arm 55. The ends of the two correction clamping arms 55 are movably connected with rubber elastic clamping posts 551 via hinge shafts. The hub 100 to be tested is clamped between the four rubber elastic clamping posts 551.

[0027] Furthermore, a horizontal sensing plate 1 is fixed at the lower part of the main vertical shaft 54, and a sensing protrusion 2 is fixed on the bottom surface of the outer side of the horizontal sensing plate 1. A first connecting frame is fixed on the top surface of the lower horizontal plate located on the outer side of the coupling, and a first proximity switch 3 is fixed on the first connecting frame. A second connecting frame is fixed on the top surface of the middle part of the lower horizontal plate between the main vertical shaft 54 ​​and the secondary vertical shaft 56, and a second proximity switch 4 is fixed on the second connecting frame. The first proximity switch 3 and the second proximity switch 4 correspond to the sensing protrusion 2.

[0028] The top surface of the top plate of the bottom frame 10 is fixed with fixing blocks at the front and rear of the left and right sides. Adjusting limit bolts 5 are screwed into the screw holes in the center of the top surface of the fixing blocks. The top surface of the rotating part of the adjusting limit bolt 5 faces the bottom surface of the lifting plate 20. By rotating the adjusting limit bolt 5, the height of the top surface of its rotating part can be changed, thereby limiting the descent position of the lifting plate 20. When the lifting plate 20 descends, it presses against the top surface of the rotating parts of all the adjusting limit bolts 5, thus achieving the limiting effect.

[0029] Furthermore, the bottom surface of the top plate of the rotating sleeve 40 is fixed on the top surface of the rotating sleeve 30. A first cylinder 41 is fixed in the middle of the bottom surface of the top plate of the rotating sleeve 40. The top of the push rod of the first cylinder 41 is inserted into the central through hole of the top plate of the rotating sleeve 40. A lifting block 42 is fixed on the top of the push rod of the first cylinder 41. The outer side wall of the lifting block 42 is closely attached to the inner side wall of the self-lubricating guide sleeve 43 fixed on the inner side wall of the central through hole.

[0030] The top surface of the lifting block 42 is fixed with a conical clamping block 44 with a large bottom outer diameter and a small top outer diameter;

[0031] Multiple guide rails 45 are fixed on the top surface of the top plate of the rotating sleeve 40 surrounding the central through hole. Each guide rail 45 has an arc-shaped block 46 inserted into it. All the arc-shaped blocks 46 form an annular block. The inner wall of each arc-shaped block 46 is the inner wall of the annular block, which is a conical wall. The center of each arc-shaped block 46 has a conical through hole. An elongated guide groove is formed in the center of the bottom surface of each arc-shaped block 46. The guide rails 45 are inserted into the elongated guide groove. An elongated convex shape is formed on the inner wall of the elongated guide groove. The guide rail 45 is formed in the elongated guide groove on both sides and cooperates with it. The bottom surface of the outer side of the arc block 46 is fixed with a stop block 461. The return spring 462 is inserted into the outside of the elongated guide groove, with one end fixed to the inner side wall of the stop block 461 and the other end fixed to the outer side wall of the corresponding guide rail 45. The upper part of the conical clamping block 44 extends out of the top of the central through hole and is inserted into the conical through hole. Its outer side wall corresponds to the conical wall surface of the conical through hole.

[0032] The rotating sleeve 30 communicates with the central through hole of the top plate of the bottom frame 10. This structure allows the connecting air pipe of the first cylinder 41 to extend from the central through hole of the top plate of the bottom frame 10 and connect to the corresponding control valve of the external pneumatic system to achieve controlled operation.

[0033] Furthermore, vertical support arms 6 are fixed to the front and rear parts of the upper left and right sides above the lifting plate 20.

[0034] The conveying device includes two end plates, left and right. A middle guide plate 60 extending forward and backward is fixed on the top and bottom surfaces of the middle of the two end plates. A synchronous pulley 61 is provided between the front and rear of the two end plates. The two ends of the rotating shaft fixed at the center of the synchronous pulley 62 are movably connected to the two end plates through bearings. The synchronous belt 62 is tensioned on the corresponding two synchronous pulleys 61 and is located between the two end plates. The corresponding side wall of the middle guide plate 60 is close to or in close contact with the corresponding inner side wall of the synchronous belt 62. A conveying servo motor 63 is fixed on the outer side wall of the outer end plate. The output shaft of the conveying servo motor 63 is a splined shaft, which is inserted into the splined hole at the end of the corresponding rotating shaft and drives the corresponding synchronous pulley 62 to rotate.

[0035] The outer side wall of the outer end plate is fixed to the corresponding two vertical support arms 6.

[0036] A transverse beam 7 is fixed between the front and rear of the two opposite end plates of the two conveying devices.

[0037] Infrared transmitters 8 and infrared receivers 9 are fixed to the upper parts of two vertical plates located behind the rotating sleeve 40 on the two side support frames 50. The infrared transmitters 8 irradiate infrared rays to the receiving end of the infrared receivers 9. The infrared transmitters 8 and infrared receivers 9 correspond to the hubs 100 of the upper belts of the synchronous belts 62 of the two conveying devices.

[0038] All electrical components in this embodiment are electrically connected to the control host via electrical connection lines. Control is achieved by operating the control host. All cylinders are connected to the corresponding control valves of the pneumatic system via connecting pipes to achieve operation. This is also a conventional structure and will not be described in detail here.

[0039] In this embodiment, the bottom frame 10 is installed between the front and rear conveyor frames. The front and rear conveyor frames are conventional conveyor frames, which will not be described in detail here. A proximity switch is fixed in the screw hole at the middle of the rear part of the top plate of the middle support frame 11. The top of the proximity switch does not protrude from the top surface of the top plate. The top surface of the top plate of the middle support frame 11 is lower than the top surface of the upper belt of the two synchronous belts 62.

[0040] In use, the front conveyor frame transports the hub 100 backward to the front of the upper belt of the two synchronous belts 62. At the same time, the two conveyor servo motors 63 run, causing the two synchronous belts 62 to run and transport the hub 100 backward until its rear bottom surface is sensed by the corresponding proximity switch, indicating that it has moved into position. At this time, the two conveyor servo motors 63 stop running. At the same time, the two correction drive servo motors 53 run, causing the four correction clamping arms 55 to rotate, so that the hub 100 to be tested is clamped between the four rubber elastic clamping posts 551 and pushed by the four rubber elastic clamping posts 551 to the middle of the top plate of the middle support frame 11 (it is not exactly to the exact center, and the slight deviation is within the controllable range, such as the center deviation of about 1mm to 3mm). At this time, the sensing protrusion 2 is sensed by the top of the second proximity switch 4, indicating that it is clamped in place.

[0041] Generally, after clamping for 2 to 3 seconds, the control host controls the shafts of the two correction drive servo motors 53 to rotate in opposite directions, causing all the rubber elastic clamping posts 551 to open outward and return to their original positions until the first approach stop 4 senses the sensing protrusion 2, indicating that it has moved back to its original position.

[0042] Then, the push rod of the second lifting cylinder 13 pushes, causing the two synchronous belts 62 to lift, thus lifting the hub 100. Then, the conveyor servo motor 63 operates, conveying the hub 100 backward. Its movement distance is controlled by the number of rotations of the conveyor servo motor 63's shaft (servo motors have high operating precision). When it reaches the designated position, the rear of the hub 100 blocks the infrared rays from the infrared transmitter 8, preventing the infrared receiver 9 from receiving the infrared rays, indicating that it has moved into position. At this point, the hub 100 is rotating. The sleeve 40 is positioned directly above the top (a slight deviation of 1 to 2 mm is within a controllable range). Then, the push rods of the lifting cylinder 12 and the second lifting cylinder 13 retract, causing the two synchronous belts 62 to descend, along with the hub 100, so that it fits onto the rotating sleeve 40. The bottom end face of the hub of the hub 100 presses against the top surface of the rotating sleeve 40. At the same time, the annular block is inserted into the lower section of the central through hole at the hub of the hub 100. Then, the push rod of the first cylinder 41 pushes the conical clamping block... 44 is lifted, and all the arc-shaped blocks 46 are simultaneously expanded outward, so that the outer wall presses against the inner wall of the lower part of the central through hole, thereby centering and clamping the hub 100. Then, by running the drive motor 14, the rotating sleeve 40 is rotated, causing the hub 100 to rotate. The detection sensors around it can then sense the rotating hub 100 (e.g., a laser sensor illuminates the hub 100 with a laser and receives the reflected light, measuring the vibration speed of the hub based on the frequency change of the reflected light, and controlling the host to...). The corresponding software determines its dynamic balance (this is a conventional structure and will not be described in detail here). After the test is completed, the push rod of the first cylinder 41 retracts, and all the conical clamping blocks 44 retract through the return spring 462, no longer clamping the hub 100. The hub 100 is then lifted by the push rod of the lifting cylinder 12 and lifted by the two synchronous belts 62, moving it out of the rotating sleeve 40. Then, the hub 100 is transported backward to the rear conveyor frame by the two synchronous belts 62, and then transferred to the processing equipment at the rear. This is very convenient.

[0043] It enables continuous inspection and use of wheel hubs, with high loading and unloading efficiency and good results, greatly reducing manual labor.

[0044] Finally, the above embodiments are only used to illustrate the present utility model and are not intended to limit the present utility model. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present utility model. Therefore, all equivalent technical solutions also fall within the scope of the present utility model, and the patent protection scope of the present utility model should be defined by the claims.

Claims

1. A centering and feeding rotary device for wheel hub dynamic balancing testing, comprising a bottom frame (10), characterized in that: A middle support frame (11) is fixed in the middle of the front part of the top plate of the bottom frame (10). The middle support frame (11) is inserted into the through groove (21) formed in the middle of the front part of the lifting plate (20) set above the top plate of the bottom frame (10). Lifting cylinders (12) are fixed in the front and rear parts of the left and right sides of the bottom surface of the top plate of the bottom frame (10). The top end of the push rod of the lifting cylinder (12) extends out of the top surface of the top plate of the bottom frame (10) and fixes the connecting plate. The top surface of the connecting plate is fixed with a second lifting cylinder (13). The top end of the push rod of all the second lifting cylinders (13) is fixed on the bottom surface of the lifting plate (20). The lifting plate (20) is fixed with front-to-back extending conveying devices on the left and right sides above it, and the two conveying devices are located on the left and right sides of the middle support frame (11). A rotating sleeve (30) is movably connected to the middle of the rear part of the top plate of the bottom frame (10) via a bearing. The middle part of the rotating sleeve (30) is inserted into the through hole formed in the middle of the rear part of the lifting plate (20). The top end of the rotating sleeve (30) extends out of the top surface of the lifting plate (20) and is fixed with a rotating sleeve (40) for placing the hub (100). A transmission gear ring (31) is fixed on the lower outer wall of the rotating sleeve (30). A drive motor (14) is fixed on the top surface of the top plate of the bottom frame (10). A drive gear (15) is fixed on the output shaft of the drive motor (14) and meshes with the transmission gear ring (31).

2. The centering and feeding rotary device for wheel hub dynamic balancing testing according to claim 1, characterized in that: Side support frames (50) are fixed on the ground on both the left and right sides of the bottom frame (10). Horizontal connecting plates (51) are fixed to the upper part of the vertical plates of the two side support frames (50) facing the middle support frame (11). A main fixing block (52) is fixed to the top surface of the horizontal connecting plate (51). A lower horizontal plate is fixed to the side wall of the vertical plate of the side support frame (50) below the horizontal connecting plate (51). A correction drive servo motor (53) is fixed to the bottom surface of the lower horizontal plate. The top end of the output shaft of the correction drive servo motor (53) extends out of the top surface of the lower horizontal plate and is fixed to the main vertical shaft (54) via a coupling. The main vertical shaft (54) is movably connected to the main fixing block (52) via bearings. The top of the main vertical shaft (54)... A correction clamping arm (55) is fixed to the top surface of the main fixing block (52). A secondary vertical shaft (56) is also movably connected to the main fixing block (52) via a bearing. The lower part of the main vertical shaft (54) and the lower part of the secondary vertical shaft (56) extend out of the bottom surface of the main fixing block (52) and are respectively fixed with a drive gear (57) and a transmission gear (58). The drive gear (57) and the transmission gear (58) mesh with each other. The top end of the secondary vertical shaft (56) extends out of the top surface of the main fixing block (52) and is fixed with a correction clamping arm (55). The ends of the two correction clamping arms (55) are movably connected to rubber elastic clamping columns (551) via hinge shafts. The wheel hub (100) to be tested is clamped between the four rubber elastic clamping columns (551).

3. The centering and feeding rotary device for wheel hub dynamic balancing testing according to claim 2, characterized in that: A horizontal sensing plate (1) is fixed at the lower part of the main vertical shaft (54). A sensing protrusion (2) is fixed on the bottom surface of the outer side of the horizontal sensing plate (1). A first connecting frame is fixed on the top surface of the lower horizontal plate located outside the coupling. A first proximity switch (3) is fixed on the first connecting frame. A second connecting frame is fixed on the top surface of the middle part of the lower horizontal plate between the main vertical shaft (54) and the secondary vertical shaft (56). A second proximity switch (4) is fixed on the second connecting frame. The first proximity switch (3) and the second proximity switch (4) correspond to the sensing protrusion (2).

4. The centering and feeding rotary device for wheel hub dynamic balancing testing according to claim 1, characterized in that: The top surface of the top plate of the bottom frame (10) is fixed with a fixing block at the front and rear of the left and right sides. An adjusting limit bolt (5) is screwed into the screw hole in the middle of the top surface of the fixing block. The top surface of the rotating part of the adjusting limit bolt (5) faces the bottom surface of the lifting plate (20).

5. The centering and feeding rotary device for wheel hub dynamic balancing testing according to claim 1, characterized in that: The bottom surface of the top plate of the rotating sleeve (40) is fixed on the top surface of the rotating sleeve (30). A first cylinder (41) is fixed in the middle of the bottom surface of the top plate of the rotating sleeve (40). The top of the push rod of the first cylinder (41) is inserted into the central through hole of the top plate of the rotating sleeve (40). A lifting block (42) is fixed on the top of the push rod of the first cylinder (41). The outer side wall of the lifting block (42) is closely attached to the inner side wall of the self-lubricating guide sleeve (43) fixed on the inner side wall of the central through hole. The top surface of the lifting block (42) is fixed with a conical clamping block (44) with a large bottom outer diameter and a small top outer diameter; Multiple guide rails (45) are fixed on the top surface of the top plate of the rotating sleeve (40) around the central through hole. Each guide rail (45) has an arc-shaped block (46) inserted into it. All the arc-shaped blocks (46) form an annular block. The inner wall of all the arc-shaped blocks (46) is the inner wall of the annular block, which is a conical wall. The middle part of the arc-shaped block (46) is a conical through hole. The bottom surface of the arc-shaped block (46) is formed with an elongated guide groove. The guide rail (45) is inserted into the elongated guide groove. The inner wall of the elongated guide groove is formed with an elongated guide groove. The shaped protrusion strip is inserted into the elongated guide groove formed on both sides of the guide rail (45) and cooperates with it. The bottom surface of the outer side of the arc block (46) is fixed with a stop block (461). The return spring (462) is inserted into the outside of the elongated guide groove. One end of the spring is fixed on the inner side wall of the stop block (461), and the other end is fixed on the outer side wall of the corresponding guide rail (45). The upper part of the conical clamping block (44) extends out of the top of the central through hole and is inserted into the conical through hole. Its outer side wall corresponds to the conical wall surface of the conical through hole.

6. The centering and feeding rotary device for wheel hub dynamic balancing testing according to claim 5, characterized in that: The rotating sleeve (30) communicates with the central through hole of the top plate of the bottom frame (10).

7. The centering and feeding rotary device for wheel hub dynamic balancing testing according to claim 1, characterized in that: Vertical support arms (6) are fixed to the front and rear parts of the left and right sides above the lifting plate (20); The conveying device includes two end plates, left and right. The top and bottom surfaces of the two end plates are fixed with intermediate guide plates (60) extending forward and backward. A synchronous pulley (61) is provided between the front and rear parts of the two end plates. The two ends of the rotating shaft fixed in the center of the synchronous pulley (61) are movably connected to the two end plates through bearings. The synchronous belt (62) is tensioned on the corresponding two synchronous pulleys (61) and is located between the two end plates. The corresponding side wall of the intermediate guide plate (60) is close to or close to the corresponding inner side wall of the synchronous belt (62). A conveying servo motor (63) is fixed on the outer side wall of the outer end plate. The output shaft of the conveying servo motor (63) drives the corresponding synchronous pulley (61) to rotate. The outer side wall of the outer end plate is fixed to the corresponding two vertical support arms (6); A transverse beam (7) is fixed between the front and rear of the two opposite end plates of the two conveying devices.

8. The centering and feeding rotary device for wheel hub dynamic balancing testing according to claim 1, characterized in that: Two side support frames (50) are located behind the rotating sleeve (40). The upper part of the two vertical plates is fixed with an infrared transmitter (8) and an infrared receiver (9). The infrared transmitter (8) irradiates infrared rays to the receiving end of the infrared receiver (9). The infrared transmitter (8) and the infrared receiver (9) correspond to the hub (100) of the upper belt of the synchronous belt (62) of the two conveying devices.

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