Auxiliary mechanism for automobile hub detection

Abstract

The invention discloses an auxiliary mechanism for automobile hub detection, and the mechanism comprises a detection mechanism which comprises a detection platform; the rotating mechanism is centrally arranged above the detection table and comprises a rotating table and a motor; the positioning mechanism is centrally arranged above the detection table and comprises a positioning ring, a plurality of positioning pins distributed along the circumferential direction and a plurality of thin cylinders; the positioning ring is used for being matched with a mounting groove in the hub, and axial positioning of the hub is achieved. The plurality of positioning pins are used for being matched with a plurality of corresponding mounting holes in the hub to realize circumferential positioning of the hub; the plurality of thin air cylinders respectively drive the corresponding positioning pins to lift, so that the positioning pins are inserted into and separated from mounting holes in the hub; and the motor drives the rotary table to rotate through the transmission system, and further drives the positioned hub to rotate synchronously, so that complete detection of the circumferential surface of the hub is realized. The method effectively solves the problems of inaccurate positioning, low efficiency, easy pollution and the like in traditional detection, and has a good industrial application prospect.

Description

Technical Field

[0001] This invention relates to the technical field of testing equipment, and specifically to an auxiliary mechanism for testing automobile wheel hubs. Background Technology

[0002] In the automotive manufacturing and repair industry, wheel hubs are critical safety components, and their geometric accuracy (such as radial runout, axial runout, and roundness) directly affects the stability and safety of vehicle operation. Therefore, they must be rigorously inspected during production or rework. Traditional inspection methods mostly rely on manual clamping and rotation, which suffers from low positioning accuracy, low efficiency, and high labor intensity, making it difficult to meet the cycle time requirements of automated production lines.

[0003] In existing testing equipment, some use clamps to hold the wheel hub edge or bolt holes for fixation, but this can easily cause workpiece deformation or positioning misalignment. At the same time, the wheel hub mounting holes and positioning surfaces are often covered with dust, oil or debris, which affects the insertion of positioning pins and measurement accuracy.

[0004] Therefore, there is an urgent need for an auxiliary mechanism for automotive wheel hub inspection that is structurally sound, precisely positioned, and highly automated, capable of achieving automatic wheel hub alignment and efficient cleaning, thereby improving inspection accuracy and efficiency. Summary of the Invention

[0005] The purpose of this invention is to provide an auxiliary mechanism for detecting automobile wheel hubs, so as to solve the above-mentioned defects caused by the prior art.

[0006] An auxiliary mechanism for inspecting automobile wheel hubs includes: Testing facilities, including testing stations; The rotating mechanism, centrally located above the testing table, includes a rotating table and a motor; The positioning mechanism is centrally located above the testing platform and includes a positioning ring, multiple circumferentially distributed positioning pins, and multiple thin cylinders. The positioning ring is used to cooperate with the mounting groove on the wheel hub to achieve axial positioning of the wheel hub; Multiple locating pins are used to engage with corresponding mounting holes on the wheel hub to achieve circumferential positioning of the wheel hub; Multiple thin cylinders drive the corresponding positioning pins to rise and fall, so as to achieve the insertion and disengagement of the pins with the mounting holes on the wheel hub. The electric motor drives the rotary table to rotate through the transmission system, which in turn drives the positioned wheel hub to rotate synchronously, thus achieving complete detection of the circumferential surface of the wheel hub.

[0007] Preferably, the testing platform is provided with a magnetic base, a universal bracket is connected to the magnetic base, and a dial indicator is installed at the end of the universal bracket.

[0008] Preferably, the rotary table is rotatably mounted at the center of the testing platform via a first rotary shaft. Multiple motors are evenly distributed circumferentially and fixed to the testing platform via a fixed frame. The output end of each motor is connected to a drive wheel. The first rotary shaft is connected to a first friction wheel via a first one-way bearing. The fixed frame is also rotatably connected to a second rotary shaft. The upper end of the second rotary shaft is connected to a second friction wheel via a second one-way bearing. The drive wheel makes frictional contact with the corresponding first and second friction wheels.

[0009] Preferably, the positioning ring is fixedly installed at the center of the rotary table via a connecting pipe. Multiple thin cylinders are evenly distributed circumferentially on the outside of the connecting pipe, with their piston rods extending upwards and connected to positioning pins one-to-one via connecting blocks. The positioning pins pass through the positioning ring and are slidably connected to it. A pair of support rods are symmetrically distributed on both sides of the positioning pin. The support rods pass through the positioning ring and are slidably connected to it, with a support ball fixed at their top. A linkage bar is hinged between the positioning pin and the support rod via a connecting pin. The inner end of the linkage bar is slidably connected to the connecting groove on the connecting block via a pin, and the outer end abuts against the lower end of the adjacent support rod.

[0010] Preferably, multiple telescopic rods are evenly distributed circumferentially on the inner side of the connecting pipe, and their top ends are connected to a lifting plate. An air bladder is coaxially connected to the lifting plate, and air bladders are provided with evenly distributed air holes on both the upper and lower sides.

[0011] Preferably, the bottom of the jet bag is connected to an air delivery tube.

[0012] Preferably, a compression spring is fitted onto the telescopic rod.

[0013] Compared with the prior art, the present invention has the following advantages: 1. High-precision automatic positioning: Axial positioning is achieved by using a positioning ring and mounting groove, and circumferential positioning is achieved by using multiple positioning pins and mounting holes. Synchronous insertion is achieved through a linkage mechanism, resulting in high positioning accuracy, good repeatability, and avoiding eccentricity errors.

[0014] 2. Fully automatic clamping process: The hub is driven to rotate by the reverse rotation of the electric motor, combined with the gravity automatic falling mechanism, to achieve fully automatic clamping of "rotation to align the hole → automatic falling → synchronous positioning", without the need for manual intervention, thus improving the inspection efficiency.

[0015] 3. Dual-mode friction transmission design: Utilizing a one-way bearing to achieve different transmission paths for forward and reverse rotation—forward rotation is used for detection of rotation, and reverse rotation is used for automatic hole alignment. The structure is ingenious, the transmission is smooth, and slippage is avoided.

[0016] 4. Intelligent cleaning function: The air bladder with double air holes at the top and bottom automatically blows the wheel hub mounting area and the surface of the positioning ring before clamping to prevent impurities from interfering and improve positioning reliability and detection accuracy. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention before and after detection.

[0018] Figure 2 This is a schematic diagram of the structure of the present invention during the detection process.

[0019] Figure 3 This is a three-dimensional structural diagram of the testing facility.

[0020] Figure 4 This is a three-dimensional structural diagram of the rotating mechanism.

[0021] Figure 5 for Figure 4 A schematic diagram of the structure at point A in the middle.

[0022] Figure 6 This is a partial three-dimensional structural diagram of the rotating mechanism.

[0023] Figure 7 This is a three-dimensional structural diagram of the positioning mechanism.

[0024] Figure 8 This is a partial three-dimensional structural diagram of the positioning mechanism.

[0025] Figure 9 This is a three-dimensional structural diagram of the wheel hub.

[0026] in: 10-Testing organization; 101-Testing table; 102-Magnetic base; 103-Universal bracket; 104-Dial indicator; 20-Rotating mechanism; 201-Rotating shaft one; 202-Rotating table; 203-Fixed frame; 204-Motor; 205-Drive wheel; 206-One-way bearing one; 207-Friction wheel one; 208-Rotating shaft two; 209-One-way bearing two; 210-Friction wheel two; 30-Positioning mechanism; 301-Connecting pipe; 302-Positioning ring; 303-Positioning pin; 304-Support rod; 305-Supporting ball; 306-Thin cylinder; 307-Connecting block; 307a-Connecting groove; 308-Connecting pin; 309-Linkage bar; 310-Telescopic rod; 311-Lifting plate; 312-Airbag; 312a-Air outlet; 313-Air supply pipe; 314-Compression spring; 40 - Hub; 40a - Mounting slot; 40b - Mounting hole. Detailed Implementation

[0027] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0028] like Figures 1 to 9 As shown, an auxiliary mechanism for inspecting automobile wheel hubs includes: Testing facility 10 includes testing station 101; The rotating mechanism 20 is centrally located above the testing table 101 and includes a rotating table 202 and a motor 204. The positioning mechanism 30 is centrally located above the testing platform 202 and includes a positioning ring 302, multiple positioning pins 303 distributed circumferentially, and multiple thin cylinders 306. The positioning ring 302 is used to cooperate with the mounting groove 40a on the hub 40 to achieve axial positioning of the hub 40; Multiple locating pins 303 are used to engage with multiple mounting holes 40b on the wheel hub 40 to achieve circumferential positioning of the wheel hub 40; Multiple thin cylinders 306 drive the corresponding positioning pins 303 to rise and fall, so as to achieve the insertion and disengagement of the pins from the mounting holes 40b on the hub 40. The electric motor 204 drives the rotary table 202 to rotate through the transmission system, thereby driving the positioned wheel hub 40 to rotate synchronously, realizing the complete detection of the circumferential surface of the wheel hub 40.

[0029] In this embodiment, a magnetic base 102 is provided on the testing platform 101, and a universal bracket 103 is connected to the magnetic base 102. A dial indicator 104 is installed at the end of the universal bracket 103. The magnetic base 102 can be firmly attached to the iron testing platform 101, and the universal bracket 103 supports multi-angle adjustment, allowing the dial indicator 104 probe to be flexibly aligned with the part to be measured, making the testing convenient and highly accurate. This testing mechanism 10 can be used to measure geometric accuracy parameters such as radial runout, end face runout, and roundness of the wheel hub 40.

[0030] In this embodiment, the rotary table 202 is rotatably mounted at the center of the testing table 101 via a first rotary shaft 201. Multiple motors 204 are evenly distributed circumferentially and fixed to the testing table 101 via a fixed frame 203. Their output ends are connected to drive wheels 205. The first rotary shaft 201 is connected to a friction wheel 207 via a one-way bearing 206. The fixed frame 203 is also rotatably connected to a second rotary shaft 208. The upper end of the second rotary shaft 208 is connected to a second friction wheel 210 via a one-way bearing 209. The drive wheel 205 is in frictional contact with the corresponding first friction wheel 207 and second friction wheel 210. When the motor 204 rotates forward, the drive wheel 205 drives the friction wheel 207 and the friction wheel 210 to rotate synchronously. Under this rotation, the one-way bearing 206 is locked, transmitting the torque of the friction wheel 207 to the rotating shaft 201, thereby driving the rotary table 202 to rotate. At the same time, the one-way bearing 209 is in a free state, and the friction wheel 210 rotates idly without participating in the transmission. The rotary table 202 drives the positioned hub 40 to rotate smoothly, realizing continuous and complete detection of its circumferential surface. When the motor 204 reverses, the drive wheel 205 still drives the first friction wheel 207 and the second friction wheel 210 to rotate. At this time, the first one-way bearing 206 is in a free state, and the first friction wheel 207 does not transmit power. The second one-way bearing 209 is in a locked state, transmitting the torque of the second friction wheel 210 to the second rotating shaft 208, thereby driving it to rotate. The second friction wheel 210 contacts the inner wall of the hub 40, driving the unpositioned hub 40 to rotate slowly. When each mounting hole 40b on the hub 40 is aligned with each positioning pin 303, the hub 40 automatically falls under the action of gravity, causing the positioning ring 302 to be embedded in the mounting groove 40a. At the same time, each positioning pin 303 is simultaneously inserted into the corresponding mounting hole 40b, realizing the automatic alignment and rapid positioning of the hub 40.

[0031] In this embodiment, the positioning ring 302 is fixedly installed at the center of the rotary table 202 via the connecting pipe 301. Multiple thin cylinders 306 are evenly distributed circumferentially on the outside of the connecting pipe 301, with their piston rods extending upwards and connected to the positioning pins 303 one-to-one via the connecting block 307. The positioning pins 303 pass through the positioning ring 302 and are slidably connected to it. A pair of support rods 304 are symmetrically distributed on both sides of the positioning pin 303. The support rods 304 pass through the positioning ring 302 and are slidably connected to it, with a support ball 305 fixed at their top. A linkage bar 309 is hinged between the positioning pin 303 and the support rod 304 via the connecting pin 308. The inner end of the linkage bar 309 is slidably connected to the connecting groove 307a on the connecting block 307 via a pin, and the outer end abuts against the lower end of the adjacent support rod 304. The piston rod of the thin cylinder 306 retracts, and after being driven by the linkage bar 309, it drives the support rods 304 and support balls 305 on both sides to rise. These support balls 305 are distributed and supported in the mounting grooves 40a of the wheel hub 40, helping the wheel hub 40 to be coaxially distributed above the positioning ring 302. When each mounting hole 40b on the wheel hub 40 is aligned with each positioning pin 303, the piston rod of the thin cylinder 306 extends, and after being driven by the linkage bar 309, it drives the support rods 304 and support balls 305 on both sides to fall. These positioning pins 303 are simultaneously inserted into the corresponding mounting holes 40b, and the positioning ring 302 is embedded in the mounting groove 40a, realizing the automatic alignment and rapid positioning of the wheel hub 40.

[0032] In this embodiment, multiple telescopic rods 310 are evenly distributed circumferentially on the inner side of the connecting pipe 301, and their top ends are connected to a lifting plate 311. An air bladder 312 is coaxially connected to the lifting plate 311, and air bladder 312 has evenly distributed air vents 312a on both its upper and lower sides. Before positioning the wheel hub 40, the air vents 312a around the upper side of the air bladder 312 eject airflow to remove dust and debris from the mounting groove 40a and mounting hole 40b of the wheel hub 40, preventing impurities from affecting the positioning of the wheel hub 40.

[0033] In this embodiment, an air supply pipe 313 is connected to the bottom of the jet bag 312. The air supply pipe 313 is used to connect to an external air source to provide compressed air to the jet bag 312.

[0034] In this embodiment, a compression spring 314 is sleeved on the telescopic rod 310. Under the elastic force of the compression spring 314, the paint spray bladder 312 rises with the lifting plate 311 to above the connecting pipe 301, and the air jet holes 312a on its lower side spray out airflow to clean the upper surface of the positioning ring 302 and prevent impurities from affecting the positioning of the wheel hub 40.

[0035] Working principle of an auxiliary mechanism for automobile wheel hub inspection: During operation, the wheel hub 40 to be tested is first placed above the rotary table 202. The motor 204 is started and reversed, driving the drive wheel 205 to rotate friction wheel 207 and friction wheel 210 synchronously. At this time, one-way bearing 206 is in a free state, and one-way bearing 209 is in a locked state. Power is transmitted through friction wheel 210 to the rotating shaft 208, thereby driving friction wheel 210 to rotate. Friction wheel 210 contacts the inner wall of the wheel hub 40, causing it to rotate slowly.

[0036] At the same time, the air bladder 312 rises with the lifting plate 311 under the action of the compression spring 314, and blows the mounting groove 40a and mounting hole 40b area of ​​the wheel hub 40 through the upper side air bladder 312a to remove dust and debris; the lower side air bladder 312a cleans the upper surface of the positioning ring 302 to ensure that the positioning surface is clean.

[0037] When each mounting hole 40b on the wheel hub 40 is aligned with each locating pin 303, the piston rod of the thin cylinder 306 extends. After being driven by the linkage bar 309, it drives the support rods 304 and support balls 305 on both sides to descend. The locating pins 303 are then inserted into the corresponding mounting holes 40b in a synchronized manner, and the locating ring 302 is embedded in the mounting groove 40a, thereby realizing the automatic alignment and rapid positioning of the wheel hub 40.

[0038] After positioning is completed, motor 204 switches to forward rotation mode, one-way bearing 206 locks, one-way bearing 209 is free, and power is transmitted to rotating shaft 201 via friction wheel 207, driving the rotary table 202 to rotate the positioned hub 40 smoothly. Dial indicator 104, mounted on magnetic base 102, adjusts the probe position via universal bracket 103 to continuously detect the circumferential surface of hub 40 and obtain geometric parameters such as runout and roundness.

[0039] After the test is completed, the thin cylinder 306 drives the positioning pin 303 to retract, and the wheel hub 40 is lifted or moved out, completing one work cycle.

[0040] Therefore, the disclosed embodiments described above are merely illustrative in all respects and are not exhaustive. All modifications within the scope of this invention or its equivalents are included in this invention.

Claims

1. An auxiliary mechanism for inspecting automobile wheel hubs, characterized in that, include: Testing facility (10), including testing station (101); The rotating mechanism (20) is centrally located above the testing table (101) and includes a rotating table (202) and a motor (204). The positioning mechanism (30) is centrally located above the testing platform (202) and includes a positioning ring (302), multiple positioning pins (303) distributed circumferentially, and multiple thin cylinders (306). The positioning ring (302) is used to cooperate with the mounting groove (40a) on the hub (40) to achieve axial positioning of the hub (40); Multiple locating pins (303) are used to engage with multiple mounting holes (40b) on the hub (40) to achieve circumferential positioning of the hub (40); Multiple thin cylinders (306) drive the corresponding positioning pins (303) to rise and fall, so as to achieve their insertion and disengagement from the mounting holes (40b) on the hub (40); The electric motor (204) drives the rotary table (202) to rotate through the transmission system, thereby driving the positioned wheel hub (40) to rotate synchronously, realizing the complete detection of the circumferential surface of the wheel hub (40).

2. The auxiliary mechanism for detecting automobile wheel hubs according to claim 1, characterized in that, The testing platform (101) is provided with a magnetic base (102), and a universal bracket (103) is connected to the magnetic base (102). A dial indicator (104) is installed at the end of the universal bracket (103).

3. The auxiliary mechanism for detecting automobile wheel hubs according to claim 1, characterized in that, The rotating table (202) is rotatably mounted at the center of the testing table (101) via a rotating shaft (201). Multiple motors (204) are evenly distributed circumferentially and fixed to the testing table (101) via a fixed frame (203). The output end of the motor is connected to a drive wheel (205). The rotating shaft (201) is connected to a friction wheel (207) via a one-way bearing (206). The fixed frame (203) is also rotatably connected to a rotating shaft (208). The upper end of the rotating shaft (208) is connected to a friction wheel (210) via a one-way bearing (209). The drive wheel (205) is in frictional contact with the corresponding friction wheel (207) and friction wheel (210).

4. The auxiliary mechanism for detecting automobile wheel hubs according to claim 1, characterized in that, The positioning ring (302) is fixedly installed at the center of the rotary table (202) through the connecting pipe (301). Multiple thin cylinders (306) are evenly distributed around the outside of the connecting pipe (301) in the circumferential direction. Their piston rods extend upward and are connected to the positioning pins (303) one by one through the connecting block (307). The positioning pins (303) pass through the positioning ring (302) and are slidably connected to it. A pair of support rods (304) are symmetrically distributed on both sides of the positioning pin (303). The support rods (304) pass through the positioning ring (302) and are slidably connected to it. A support ball (305) is fixed at the top of the support rods (304). A linkage bar (309) is hinged between the positioning pin (303) and the support rod (304) through the connecting pin (308). The inner end of the linkage bar (309) is slidably connected to the connecting groove (307a) on the connecting block (307) through the pin, and the outer end abuts against the lower end of the adjacent support rod (304).

5. The auxiliary mechanism for detecting automobile wheel hubs according to claim 4, characterized in that, Multiple telescopic rods (310) are evenly distributed along the circumference inside the connecting pipe (301), and their top ends are connected to a lifting plate (311). A jet bag (312) is coaxially connected to the lifting plate (311), and jet holes (312a) are evenly distributed on both the upper and lower sides of the jet bag (312).

6. The auxiliary mechanism for detecting automobile wheel hubs according to claim 5, characterized in that, The bottom of the jet bag (312) is connected to an air delivery tube (313).

7. The auxiliary mechanism for detecting automobile wheel hubs according to claim 5, characterized in that, A compression spring (314) is fitted onto the telescopic rod (310).

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