A detection device for measuring the accuracy of a rotating hub

Abstract

The present invention discloses a detection device for measuring the precision of a rotating hub, comprising a workbench, a detection mechanism installed on the workbench, the detection mechanism comprising a motor 1 and a motor 2, both of which are installed on the lower surface of the workbench, a screw is installed on the output shaft of the motor 1, a moving block is threadedly connected to the screw, a laser precision detector 1 is installed on one side wall of the moving block, a rotating shaft is installed on the output shaft of the motor 2, a mounting block is fixed on the top of the rotating shaft, a laser precision detector 2 is installed on one side wall of the mounting block, a U-shaped guide plate is fixed on the upper surface of the workbench, a guide block is slidably connected inside the U-shaped guide plate, a connecting rod is fixed on the side wall of the guide block, and one end of the connecting rod is fixedly connected to the moving block. The present invention can perform comprehensive detection on the inner and outer surfaces of the rotating hub, with a small detection error, and can also detect multiple connecting holes of the rotating hub, thereby ensuring the quality of the rotating hub and the accuracy of later assembly.

Description

Technical Field

[0001] The invention relates to the technical field of hub detection equipment, and in particular to a detection equipment used for hub precision measurement. Background Art

[0002] As new energy vehicle technology matures and the market grows rapidly, the manufacturing and processing technology of automotive motors is becoming more and more demanding, requiring the process to be simple, reliable and efficient. The hub and adapter flange of automotive motors are key components of the motor, used to bear the weight of the motor or motor rotor, and transitionally connect the motor and other automotive power components such as the engine and reducer. They are required to have high strength, wear resistance, high temperature resistance, oxidation resistance and corrosion resistance. The motor hub is generally used to install the motor rotor core and support the weight of the entire rotor. In the automotive ISG motor, it also plays the role of connecting the input end - the engine crankshaft, and the output end - the gearbox or clutch. Its operating speed can reach 5000~9000r / min. It is a key component of the motor and has high process requirements.

[0003] Most hubs are cylindrical parts. Traditional processes generally use hot casting processes. In mass production, there will be some defects. For example, the surface accuracy does not meet the use requirements. In places where the wall thickness is uneven, cracks, pores, slag holes and other defects are prone to occur. Currently, they are all tested by testing tools such as micrometers. However, due to the accuracy of the tools and the testing operation, there will be errors in the measurement data, which makes the overall quality of the product cannot be guaranteed when it is finally assembled. Summary of the invention

[0004] The present application proposes a detection device for measuring the accuracy of a hub, in order to solve the problem mentioned in the above background technology that the existing detection is carried out by detection tools such as micrometers, but due to the accuracy of the tools and the detection operation, errors will occur in the measurement data, making it impossible to guarantee the overall quality of the product when it is finally assembled.

[0005] In order to achieve the above purpose, this application adopts the following technical solutions:

[0006] The present invention discloses a detection device for measuring the precision of a hub, comprising a workbench, wherein a detection mechanism is installed on the workbench, the detection mechanism comprises a motor 1 and a motor 2, both of which are installed on the lower surface of the workbench, a screw is installed on the output shaft of the motor 1, a moving block is threadedly connected to the screw, a laser precision detector 1 is installed on one side wall of the moving block, a rotating shaft is installed on the output shaft of the motor 2, a mounting block is fixed on the top of the rotating shaft, a laser precision detector 2 is installed on one side wall of the mounting block, a U-shaped guide plate is fixed on the upper surface of the workbench, a guide block is slidably connected in the U-shaped guide plate, a connecting rod is fixed on the side wall of the guide block, and one end of the connecting rod is fixedly connected to the moving block, a rotating column is rotatably installed on the upper surface of the workbench, a placement plate is fixed on the top of the rotating column, and a hub body is placed on the placement plate.

[0007] As a preferred technical solution of the present invention, the hub body includes a chassis portion and a cylindrical portion, a plurality of connection holes 1 are provided in a circumferential array on the chassis portion, and a plurality of connection holes 2 are provided in a circumferential array on the cylindrical portion.

[0008] As a preferred technical solution of the present invention, the placement plate is a circular structure, a plurality of detection columns are arranged in a circular array on the upper surface of the placement plate, a gear ring is fixed on the placement plate, a gear is fixed on the screw, and the gear is meshed with the gear ring.

[0009] As a preferred technical solution of the present invention, a plurality of pillars are fixed to the upper surface of the workbench, a top plate is commonly fixed to the top ends of the plurality of pillars, a driving mechanism and a rotating hub lifting mechanism are arranged on the lower surface of the top plate, the driving mechanism is used to drive the rotating hub lifting mechanism to move, the driving mechanism comprises two fixed plates, both fixed plates are fixed on the lower surface of the top plate, a motor three is installed on one of the fixed plates, a screw rod is rotatably installed between the two fixed plates, a nut block is threadedly connected to the screw rod, and the rotating hub lifting mechanism is fixed on the nut block.

[0010] As a preferred technical solution of the present invention, the hub lifting mechanism includes an electric push rod, which is installed on the lower surface of the nut block. The output shaft of the electric push rod is fixed with a mounting plate, and the lower surface of the mounting plate is fixed with a sleeve with an open bottom. A plurality of detection columns 2 are movably arranged on the side wall of the sleeve, a movable block is fixed at one end of the detection column 2, a tension spring is mounted on the detection column 2, one end of the tension spring is connected to the movable block, and the other end of the tension spring is connected to the side wall of the sleeve.

[0011] As a preferred technical solution of the present invention, the rotating hub lifting mechanism also includes two mounting rods, which are obliquely fixed on the two side walls of the nut block, and the bottom ends of the two mounting rods are commonly fixed with an electromagnet, and the side walls of multiple movable blocks are connected with pull ropes, and a plurality of fixed pulleys are installed in a circular array on the lower surface of the mounting plate, one end of the multiple pull ropes respectively passes through the fixed pulleys and penetrates the mounting plate, and one end of the multiple pull ropes located above the mounting plate is commonly fixed with a lifting ring, and a plurality of iron blocks are installed on the top of the lifting ring.

[0012] As a preferred technical solution of the present invention, a through hole is provided on the nut block, a guide rod is movably provided in the through hole, and two ends of the guide rod are respectively fixed on two fixing plates.

[0013] As a preferred technical solution of the present invention, the hanging ring and the electromagnet are both circular ring structures, and the hanging ring is a hollow plastic structure.

[0014] The beneficial effects of the present invention are:

[0015] 1. By setting up two laser precision detectors, the outer surface and inner surface of the hub body can be inspected respectively to identify whether there are defects on the hub body. The hub body can be comprehensively inspected by the instrument, and the error of the measured data is small, ensuring the inspection quality;

[0016] 2. Through the placement plate, gear ring, gear and detection column 1 and other structures, while providing support for the hub body, the detection column 1 can detect the accuracy of the connection hole 1 on the hub body. If the position of the connection hole 1 deviates, it cannot be placed stably on the placement plate. The operator can make an intuitive judgment. When the screw drives the laser precision detector 1 to move, the gear rotates synchronously, which can drive the hub body to rotate, thereby automatically and comprehensively rotating the surface of the hub body to improve the detection accuracy.

[0017] 3. After the outer surface of the hub body and the first connection hole are inspected, the electric push rod is used to drive the mounting plate to descend so that the sleeve covers the cylindrical portion of the hub body. Then, the second detection column can be used to inspect the position of the second connection hole. If one of the second detection columns cannot be inserted into the second connection hole, it means that there is a deviation in the position of the second connection hole and the accuracy is insufficient. If all the second detection columns are inserted into the second connection hole, the second connection hole meets the requirements.

[0018] 4. By setting up structures such as electromagnets, pull ropes, lifting rings and iron blocks, before driving the mounting plate and the sleeve to descend, the electromagnet is energized to adsorb the iron block and the lifting ring, thereby providing tension to the pull rope and the movable block, and pulling multiple detection columns 2 out of the sleeve at the same time, so that the detection columns 2 will not collide with the rotating hub body. When the height of the detection column 2 is consistent with the height of the connecting hole 2, the electromagnet is powered off, and under the action of the tension spring, the detection column 2 moves inward and is inserted into the connecting hole 2, thereby improving the detection efficiency of the connecting hole 2;

[0019] 5. After the inspection of the second connecting hole is completed, the electric push rod can be reset, the hub body can be raised, and then the drive structure can be used to drive it to move above the second laser precision detector. The electric push rod is used to push the hub body down, and the second laser precision detector is used to detect the inner surface of the hub body. During the descent process, the second laser precision detector rotates, thereby performing a comprehensive inspection of the inner surface of the hub body. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0021] Figure 1 It is a schematic diagram of the structure of the present invention;

[0022] Figure 2 It is a structural schematic diagram of the upper surface of the workbench of the present invention;

[0023] Figure 3 It is a structural schematic diagram of a placement plate of the present invention;

[0024] Figure 4 It is a schematic structural diagram of the rotating hub body of the present invention;

[0025] Figure 5 It is a structural schematic diagram of the rotating hub moving structure of the present invention;

[0026] Figure 6 It is a bottom view of the mounting plate and sleeve of the present invention.

[0027] In the figure: 1. workbench; 2. motor 1; 3. motor 2; 4. moving block; 5. laser precision detector 1; 6. rotating shaft; 7. mounting block; 8. laser precision detector 2; 9. U-shaped guide plate; 10. guide block; 11. connecting rod; 12. rotating column; 13. placing plate; 1301. detection column 1; 1302. gear ring; 1303. gear; 14. hub body; 1401. chassis; 1402. cylindrical part; 1403. connecting hole 1; 1404. connecting hole 2; 15. pillar ; 16. Top plate; 17. Driving mechanism; 1701. Fixed plate; 1702. Motor three; 1703. Screw rod; 1704. Nut block; 1705. Guide rod; 18. Hub lifting mechanism; 1801. Electric push rod; 1802. Mounting rod; 1803. Electromagnet; 1804. Mounting plate; 1805. Sleeve; 1806. Detection column two; 1807. Movable block; 1808. Tension spring; 1809. Pull rope; 1810. Fixed pulley; 1811. Lifting ring; 1812. Iron block. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0029] See also Figure 1 and Figure 2 As shown, a detection device for measuring the precision of a hub comprises a workbench 1, on which a detection mechanism is installed, the detection mechanism comprises a motor 2 and a motor 3, both of which are installed on the lower surface of the workbench 1, a screw is installed on the output shaft of the motor 2, a moving block 4 is threadedly connected to the screw, a laser precision detector 5 is installed on one side wall of the moving block 4, a rotating shaft 6 is installed on the output shaft of the motor 2 3, a mounting block 7 is fixed on the top of the rotating shaft 6, a laser precision detector 8 is installed on one side wall of the mounting block 7, a U-shaped guide plate 9 is fixed on the upper surface of the workbench 1, a guide block 10 is slidably connected in the U-shaped guide plate 9, a connecting rod 11 is fixed on the side wall of the guide block 10, and one end of the connecting rod 11 is fixedly connected to the moving block 4, a rotating column 12 is rotatably installed on the upper surface of the workbench 1, a placement plate 13 is fixed on the top of the rotating column 12, and a hub body 14 is placed on the placement plate 13.

[0030] Working process: first place the hub body 14 to be inspected on the placement plate 13, the placement plate 13 can rotate, and then start the motor 2, the motor 2 drives the screw to rotate, so that the moving block 4 moves on the screw, and the U-shaped guide plate 9, the guide block 10 and the connecting rod 11 are provided to guide and limit the moving block 4 to prevent the moving block 4 from rotating with the rotation of the screw. The moving block 4 drives the laser precision detector 5 to move, so as to perform precision inspection on the outer surface of the hub body 14. After the outer surface inspection of the hub body 14 is completed, the hub body 14 is placed on the outside of the laser precision detector 8, and the motor 23 is started to drive the laser precision detector 28 to rotate, so as to inspect the inner surface of the hub body 14. Compared with the existing inspection by micrometer and other inspection tools, the error of the measured data is small, thereby ensuring the inspection quality.

[0031] See also Figure 4 As shown, the hub body 14 includes a chassis portion 1401 and a cylindrical portion 1402 . A plurality of connection holes 1 1403 are provided in a circumferential array on the chassis portion 1401 , and a plurality of connection holes 2 1404 are provided in a circumferential array on the cylindrical portion 1402 .

[0032] See also Figure 3As shown, the placement plate 13 is a circular structure, and a plurality of detection columns 1301 are arranged in a circular array on the upper surface of the placement plate 13. A gear ring 1302 is fixedly mounted on the placement plate 13, and a gear 1303 is fixed on the screw, and the gear 1303 is meshed with the gear ring 1302. The positions of the plurality of detection columns 1301 are consistent with the positions of the connecting holes 1403 on the hub body 14. When the hub body 14 is placed, if there is a deviation in the position of the connecting hole 1403, it cannot be placed stably on the placement plate 13. The inspection personnel can intuitively judge that the connecting hole 1403 has insufficient precision. When the screw rotates, it drives the gear 1303 to rotate, and cooperates with the gear ring 1302 to drive the placement plate 13 to rotate, thereby performing a comprehensive inspection of the outer surface of the hub body 14.

[0033] See also Figure 1 and Figure 5 As shown, a plurality of pillars 15 are fixed to the upper surface of the workbench 1, and a top plate 16 is commonly fixed to the top ends of the plurality of pillars 15. A driving mechanism 17 and a hub lifting mechanism 18 are provided on the lower surface of the top plate 16. The driving mechanism 17 is used to drive the hub lifting mechanism 18 to move. The driving mechanism 17 comprises two fixed plates 1701, and the two fixed plates 1701 are both fixed to the lower surface of the top plate 16. A motor three 1702 is installed on one of the fixed plates 1701, and a screw rod 1703 is rotatably installed between the two fixed plates 1701. A nut block 1704 is threadedly connected to the screw rod 1703, and the hub lifting mechanism 18 is fixed on the nut block 1704; start the motor three 1702, and the motor three 1702 drives the screw rod 1703 to rotate, thereby driving the nut block 1704 to move, which can drive the hub lifting mechanism 18 to move in the horizontal direction.

[0034] See also Figure 5 and Figure 6As shown, the hub lifting mechanism 18 includes an electric push rod 1801, which is mounted on the lower surface of the nut block 1704. The output shaft of the electric push rod 1801 is fixed with a mounting plate 1804. The lower surface of the mounting plate 1804 is fixed with a sleeve 1805 with an open bottom. A plurality of detection columns 1806 are movably arranged on the side wall of the sleeve 1805. A movable block 1807 is fixed to one end of the detection column 1806. A tension spring 1808 is sleeved on the detection column 1806. One end of the tension spring 1808 is connected to the movable block 1807. The tension spring 1808 is connected to the movable block 1807. The other end of 808 is connected to the side wall of the sleeve 1805; the electric push rod 1801 is started to drive the mounting plate 1804 to descend, so that the sleeve 1805 covers the cylindrical portion 1402 of the hub body 14, and then the position of the connecting hole 1404 can be detected by using the detection column 1806. If one of the detection columns 1806 cannot be inserted into the connecting hole 1404, it means that there is a deviation in the position of the connecting hole 1404 and the accuracy is insufficient. If multiple detection columns 1806 are all inserted into the connecting hole 1404, the connecting hole 1404 meets the requirements.

[0035] See also Figure 5 and Figure 6 As shown, the hub lifting mechanism 18 also includes two mounting rods 1802, which are tilted and fixed on the two side walls of the nut block 1704, and the bottom ends of the two mounting rods 1802 are commonly fixed with an electromagnet 1803, and the side walls of the multiple movable blocks 1807 are connected with a pull rope 1809, and a plurality of fixed pulleys 1810 are installed in a circular array on the lower surface of the mounting plate 1804, and one end of the plurality of pull ropes 1809 passes through the fixed pulley 1810 and penetrates the mounting plate 1804, and one end of the plurality of pull ropes 1809 located above the mounting plate 1804 is commonly fixed with a lifting ring 1811, and a plurality of iron rods 1811 are installed on the top of the lifting ring 1811. Block 1812; before driving the mounting plate 1804 and the sleeve 1805 to descend, the electromagnet 1803 is energized to absorb the iron block 1812 and the hanging ring 1811, thereby providing tension to the pull rope 1809 and the movable block 1807, and pulling the multiple detection columns 1806 to the outside of the sleeve 1805 at the same time, so that the detection columns 1806 will not collide with the hub body 14; when the height of the detection columns 1806 is consistent with the height of the connecting hole 1404, the electromagnet 1803 is de-energized, and under the action of the tension spring 1808, the multiple detection columns 1806 move toward the connecting hole 1404 together, thereby improving the detection efficiency of the connecting hole 1404.

[0036] See also Figure 1 and Figure 5As shown, a through hole is opened on the nut block 1704, and a guide rod 1705 is movably arranged in the through hole, and the two ends of the guide rod 1705 are respectively fixed on two fixed plates 1701; the guide rod 1705 limits the nut block 1704 to prevent the nut block 1704 from rotating with the rotation of the screw rod 1703 when the screw rod 1703 rotates, thereby improving the driving effect.

[0037] See also Figure 5 As shown, the hanging ring 1811 and the electromagnet 1803 are both circular ring structures, and the hanging ring 1811 is a plastic hollow structure; the hanging ring 1811 adopts a hollow design, which is light in weight and facilitates the adsorption of the electromagnet 1803.

[0038] Working principle: When in use, place the rotating hub body 14 to be tested on the placement plate 13. When placing the rotating hub body 14, if there is a deviation in the position of the connecting hole 1403, it cannot be placed stably on the placement plate 13. The inspection personnel can intuitively judge that the connecting hole 1403 has insufficient precision, and the product is unqualified and does not need to be tested subsequently. When the rotating hub body 14 is stably placed on the placement plate 13, start the motor 2, and the motor 2 drives the screw to rotate, so that the moving block 4 moves on the screw. By setting the U-shaped guide plate 9, the guide block 10 and the connecting rod 11, the moving block 4 is guided and limited. The movable block 4 is used to prevent the movable block 4 from rotating with the rotation of the screw rod. The movable block 4 drives the laser precision detector 5 to move, so as to perform precision detection on the outer surface of the hub body 14. When the screw rod rotates, it drives the gear 1303 to rotate, and in cooperation with the gear ring 1302, it drives the placement plate 13 to rotate. When the laser precision detector 5 moves in the vertical direction, the hub body 14 rotates, so as to achieve the effect of performing a comprehensive detection on the outer surface of the hub body 14. According to the detection structure of the laser precision detector 5, if there are defects on the outer surface of the hub body 14, the product is unqualified. If there are no defects on the outer surface of the hub body 14, the next step of detection is carried out.

[0039] The electromagnet 1803 is energized to attract the iron block 1812 and the hanging ring 1811, thereby providing a pulling force to the pull rope 1809 and the movable block 1807, and pulling the multiple detection columns 1806 out of the sleeve 1805 at the same time, starting the electric push rod 1801, driving the mounting plate 1804 to descend, so that the sleeve 1805 covers the cylindrical portion 1402 of the rotating hub body 14, and the pulled detection column 1806 will not collide with the rotating hub body 14. 04 When the heights are consistent, the electromagnet 1803 is powered off, the hoist ring 1811 descends, and under the action of the tension spring 1808, multiple detection columns 1806 move toward the second connection hole 1404 together. If one of the detection columns 1806 cannot be inserted into the second connection hole 1404, it means that there is a deviation in the position of the second connection hole 1404, and the product is unqualified. If multiple detection columns 1806 are all inserted into the second connection hole 1404, the second connection hole 1404 meets the requirements, and the next step of detection is continued;

[0040] After the detection column 1806 is inserted into the second connection hole 1404, while the second connection hole 1404 is being detected, the hub body 14 can also be fixed, and the piston rod of the electric push rod 1801 is reset, so that the hub body 14 can be lifted, and then the motor 1702 is started, and the motor 1702 drives the screw rod 1703 to rotate, thereby driving the nut block 1704 to move, and the hub body 14 is moved above the laser precision detector 8, and then the electric push rod 1801 is used to lower the hub body 14, and the laser precision detector 8 is used to detect the inner surface of the hub body 14. During the descent process, the motor 3 is started to drive the laser precision detector 8 to rotate, so as to perform a comprehensive detection of the inner surface of the hub body 14.

[0041] The present invention performs comprehensive inspection on the inner and outer surfaces of the hub body 14 with a small inspection error, and can also inspect multiple connection holes of the hub body 14, thereby ensuring the quality of the hub body 14 and the accuracy of subsequent assembly.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A detection device for measuring the accuracy of a hub, comprising a workbench (1), characterized in that: The workbench (1) is provided with a detection mechanism, the detection mechanism comprising a motor 1 (2) and a motor 2 (3), both of which are mounted on the lower surface of the workbench (1), a screw is mounted on the output shaft of the motor 1 (2), a moving block (4) is threadedly connected to the screw, a laser precision detector 1 (5) is mounted on a side wall of the moving block (4), a rotating shaft (6) is mounted on the output shaft of the motor 2 (3), a mounting block (7) is fixed on the top end of the rotating shaft (6), and a side of the mounting block (7) is provided. A second laser precision detector (8) is installed on the wall; a U-shaped guide plate (9) is fixed on the upper surface of the workbench (1); a guide block (10) is slidably connected inside the U-shaped guide plate (9); a connecting rod (11) is fixed on the side wall of the guide block (10); one end of the connecting rod (11) is fixedly connected to the moving block (4); a rotating column (12) is rotatably installed on the upper surface of the workbench (1); a placement plate (13) is fixed on the top end of the rotating column (12); a rotating hub body (14) is placed on the placement plate (13); The placement plate (13) is a circular structure, and a plurality of detection columns (1301) are arranged in a circular array on the upper surface of the placement plate (13). A gear ring (1302) is fixedly mounted on the placement plate (13), and a gear (1303) is fixed on the screw rod, and the gear (1303) is meshed with the gear ring (1302). A plurality of pillars (15) are fixed to the upper surface of the workbench (1), a top plate (16) is commonly fixed to the top ends of the plurality of pillars (15), a driving mechanism (17) and a rotating hub lifting mechanism (18) are arranged on the lower surface of the top plate (16), the driving mechanism (17) is used to drive the rotating hub lifting mechanism (18) to move, the driving mechanism (17) comprises two fixed plates (1701), the two fixed plates (1701) are both fixed to the lower surface of the top plate (16), a motor three (1702) is mounted on one of the fixed plates (1701), a screw rod (1703) is rotatably mounted between the two fixed plates (1701), a nut block (1704) is threadedly connected to the screw rod (1703), and the rotating hub lifting mechanism (18) is fixed on the nut block (1704); The hub lifting mechanism (18) comprises an electric push rod (1801), the electric push rod (1801) is mounted on the lower surface of the nut block (1704), the output shaft of the electric push rod (1801) is fixed with a mounting plate (1804), the lower surface of the mounting plate (1804) is fixed with a sleeve (1805) with an open bottom, a plurality of detection columns (1806) are movably arranged on the side wall of the sleeve (1805), a movable block (1807) is fixed to one end of the detection column (1806), a tension spring (1808) is sleeved on the detection column (1806), one end of the tension spring (1808) is connected to the movable block (1807), and the other end of the tension spring (1808) is connected to the side wall of the sleeve (1805); The rotating hub lifting mechanism (18) further comprises two mounting rods (1802), the two mounting rods (1802) being fixed obliquely on the two side walls of the nut block (1704), the bottom ends of the two mounting rods (1802) being commonly fixed with an electromagnet (1803), the side walls of the plurality of movable blocks (1807) being connected with a pull rope (1809), a plurality of fixed pulleys (1810) being installed in a circular array on the lower surface of the mounting plate (1804), one end of the plurality of pull ropes (1809) respectively passing through the fixed pulleys (1810) and penetrating the mounting plate (1804), one end of the plurality of pull ropes (1809) located above the mounting plate (1804) being commonly fixed with a lifting ring (1811), and a plurality of iron blocks (1812) being installed on the top of the lifting ring (1811).

2. The detection device for measuring the hub accuracy according to claim 1, characterized in that: The rotating hub body (14) comprises a chassis portion (1401) and a cylindrical portion (1402); a plurality of first connection holes (1403) are provided in a circumferential array on the chassis portion (1401); and a plurality of second connection holes (1404) are provided in a circumferential array on the cylindrical portion (1402).

3. The detection device for measuring the hub accuracy according to claim 1, characterized in that: The nut block (1704) is provided with a through hole, in which a guide rod (1705) is movably arranged, and two ends of the guide rod (1705) are respectively fixed on two fixing plates (1701).

4. The detection device for measuring the hub accuracy according to claim 1, characterized in that: The hanging ring (1811) and the electromagnet (1803) are both circular ring structures, and the hanging ring (1811) is a hollow plastic structure.

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