Device for detecting rotating speed of wheel

Abstract

The utility model relates to a device for detecting the rotating speed of a wheel and belongs to the field of tire performance detection. A gear is installed at the bottom of the bearing sleeve shell, an arc-shaped through groove is machined in the tooth face of the gear, a guide column on the upper side face of a telescopic claw is inserted into the arc-shaped through groove, a guide groove is machined in the radial direction of the bottom of the bearing sleeve shell, a pin rod on the lower side face of the telescopic claw is inserted into the guide groove, and a transmission shaft penetrates through a hole in the bottom of the bearing sleeve shell. A ratchet wheel is fixed to the transmission shaft, a pawl is hinged to the position, on one side of the ratchet wheel, of the bearing sleeve shell through a pawl fixing screw, a radial magnet is embedded in the center of the bottom of an inner cavity of the bearing sleeve shell, a fixing screw is installed on the bearing sleeve shell, and the rotating bearing in the bearing sleeve shell is fixed through the fixing screw. The center of the rotating bearing is provided with a fixing shaft, the fixing shaft is provided with a trigger sensor, the inner end of the fixing shaft is provided with a wheel speed sensor, the outer end of the fixing shaft is fixed to the wire pipe, and the bearing sleeve shell is provided with a trigger magnet.

Description

Technical Field

[0001] This utility model relates to the field of tire performance testing devices, specifically a device for detecting wheel rotation speed. Background Technology

[0002] As is well known, wheel speed measurement can be used to analyze driving behavior and tire performance. By measuring wheel rotation speed and the speed changes of each wheel under various road conditions, and collecting data through VBOX, the tire performance under certain driving habits can be further evaluated. During testing, the wheel speed meter needs to be installed and fixed on the wheel rim and rotate synchronously with the wheel to achieve real-time detection of wheel rotation speed. The collected data is further processed through noise reduction to form valid evidence according to the analysis purpose. Currently, there are few similar devices on the market that meet the accuracy requirements, and they mainly rely on imports, which are expensive. At the same time, existing similar devices generally have some problems with axle positioning and ease of installation. Furthermore, in the data export process, due to the need to use software that is compatible with the hardware, there is a lack of flexibility in data acquisition. Summary of the Invention

[0003] In order to overcome the shortcomings of the prior art, this utility model provides a device for detecting wheel speed, which can be conveniently fixed on the central shaft of the wheel rim to obtain stable measurement data.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a device for detecting wheel speed, comprising a cylindrical bearing housing, characterized in that a gear is mounted on the outer bottom of the center position of the bearing housing via a gear shaft, the gear tooth surface is machined with an arc-shaped through groove, a guide post on the upper side of the telescopic pawl is inserted into the arc-shaped through groove, guide grooves are radially symmetrically machined on the bottom of the bearing housing, a pin on the lower side of the telescopic pawl is inserted into the guide groove, a drive shaft is inserted into a hole at the bottom of the bearing housing, a drive gear is mounted on the outer end of the drive shaft, and the drive gear meshes with the gear. A ratchet is fixed on the drive shaft inside the bearing housing. A pawl is hinged to the bearing housing on one side of the ratchet via a pawl fixing screw. A radial magnet is embedded in the center of the bottom of the bearing housing cavity. Fixing screws are symmetrically installed on the bearing housing to fix the rotating bearing inside the bearing housing. A fixing shaft is installed at the center of the rotating bearing. A trigger sensor is installed on the fixing shaft. A wheel speed sensor is installed at the inner end of the fixing shaft. The outer end of the fixing shaft passes through the center of a circular cover and is fixed to the conduit. The cover is fixed at the opening of the bearing housing. The bearing housing is equipped with a trigger magnet.

[0005] The beneficial effects of this invention are that it can be accurately and conveniently fixed on the central shaft of the wheel rim and rotate synchronously with the tire; it ensures that the internal wheel speed sensor and radial magnet are in very close relative positions and remain unchanged, with only relative rotational motion occurring, thereby obtaining stable and accurate data. Attached Figure Description

[0006] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0007] Figure 1 A perspective view of this utility model from the main view direction.

[0008] Figure 2 A perspective view of this utility model from the rear.

[0009] Figure 3 A disassembly diagram of the rotating structure of this utility model.

[0010] Figure 4 A disassembly diagram of the expansion fixing structure of this utility model.

[0011] Figure 5 A schematic diagram of the usage state of this utility model.

[0012] In the diagram: 1. Rotating structure; 2. Expansion fixing structure; 3. Rotary bearing; 4. Wheel speed sensor; 5. Trigger sensor; 6. Bearing housing; 7. Fixing screw; 8. Fixing shaft; 9. Cover; 10. Conduit; 11. Radial magnet; 12. Trigger magnet; 13. Telescopic pawl; 14. Gear; 15. Ratchet; 16. Gear shaft; 17. Drive shaft; 18. Pawl; 19. Pawl fixing screw; 20. Arc-shaped through groove; 21. Guide groove; 22. Guide post; 23. Pin; 24. Drive gear. Detailed Implementation

[0013] In the figure, the present invention includes a rotating structure 1 (such as...). Figure 3 ) and expansion fixing structure 2 (such as Figure 4The rotating structure 1 includes a rotating bearing 3, a wheel speed sensor 4, a trigger sensor 5, a bearing housing 6, a fixing screw group 7, a fixing shaft 8, a cover 9, a conduit 10, a radial magnet 11, and a trigger magnet 12; the expanding fixing structure 2 includes a telescopic claw 13, a gear 14, a ratchet 15, a gear shaft 16, a transmission shaft 17, a ratchet 18, a ratchet fixing screw 19, an arc-shaped through groove 20, a guide groove 21, a guide post 22, a pin 23, and a transmission gear 24. A gear 14 is mounted on the outer bottom of the center of the cylindrical bearing housing 6 via a gear shaft 16. An arc-shaped through groove 20 is machined on the tooth surface of the gear 14. A guide post 22 on the upper side of the telescopic pawl 13 is inserted into the arc-shaped through groove 20. Radially symmetrical guide grooves 21 are machined on the bottom of the bearing housing 6. A pin 23 on the lower side of the telescopic pawl 13 is inserted into the guide groove 21. A drive shaft 17 is inserted into a hole at the bottom of the bearing housing 6. A drive gear 24 is mounted on the outer end of the drive shaft 17, meshing with the gear 14. A ratchet 15 is fixed on the drive shaft 17 inside the bearing housing 6. A pawl 18 is hinged to the bearing housing 6 on one side of the bearing housing 6 via a pawl fixing screw 19. A radial magnet 11 is embedded in the center of the bottom of the inner cavity of the bearing housing 6. Fixing screws 7 are symmetrically installed on the bearing housing 6. The fixing screws 7 fix the rotating bearing 3 inside the bearing housing 6. A fixing shaft 8 is installed at the center of the rotating bearing 3. A trigger sensor 5 is installed on the fixing shaft 8. A wheel speed sensor 4 is installed at the inner end of the fixing shaft 8. The outer end of the fixing shaft 8 passes through the center of the annular cover 9 and is fixed to the conduit 10. The cover 9 is fixed at the opening of the bearing housing 6. A trigger magnet 12 is installed on the bearing housing 6.

[0014] When the various structural components are linked: First, loosen the pawl fixing screw 19 to release the pawl 18, retracting the telescopic pawl 13 to its minimum radius position. Then, manually rotate the ratchet 15 in one direction from the inside of the bearing housing 6, driving the drive shaft 17 and drive gear 24 to rotate. The drive gear 24 drives the gear 14 to rotate, thus pushing the retractable pawl 13 outward until it jams the circular hole in the center of the rim. The internal ratchet 15 can prevent the telescopic pawl 13 from retracting in the opposite direction through the drive shaft 17. At this time, since the ratchet 15 cannot rotate in the opposite direction, the entire expansion fixing structure 2 is fixed on the rim. Finally, the fixing screw 19 is used to further fix the pawl 18, so that the ratchet 15 and the linkage structure of each part are completely fixed. The expansion fixing structure 2 mainly uses the radially retractable telescopic pawl 13 to adjust and adapt to the diameter of the circular hole behind different rim covers, thereby achieving effective fixation on the central axis of various rims.

[0015] The rotary bearing 3 has a fixed shaft 8 and a wheel speed sensor 4 installed at its center. The fixed shaft 8 is connected to a conduit 10 fixed to the vehicle body and remains relatively stationary when the wheel drives the rotary bearing 3 to rotate. This keeps the wheel speed sensor 4 installed at its center stationary as well. The bearing housing 6 rotates with the wheel, which in turn drives the outer ring of the rotary bearing 3 to rotate together through the fixing screw 7. The radial magnet 11 embedded at the center of the bearing housing 6 rotates together with it, thereby generating a magnetic field with changing direction. Based on the Hall effect, a pulse electrical signal reflecting the wheel speed is generated.

[0016] The method of using this utility model is as follows:

[0017] S1. Adjust the expansion fixing structure 2 by rotating the ratchet 18 inside the bearing housing 6 so that the outer ring of its six telescopic claws 13 adapts to the diameter of the central hole in the rim and is inserted into the central hole in the rim. Tighten the ratchet fixing screws 19.

[0018] S2. Assemble the remaining parts of the rotating structure 1 except for the bearing housing 6 which is already fixed to the center of the rim, then fix the rotating bearing 3 with the fixing screws 7 and tighten the cover 9.

[0019] S3. The wires connected to the wheel speed sensor 4 and the trigger sensor 5 pass through the fixed shaft 8 and the conduit 10 to connect to the vehicle's internal circuitry. The upper end of the conduit 10 needs to be connected and fixed to the test vehicle's outer shell to ensure that the fixed shaft 8 remains stationary relative to the test vehicle.

[0020] S4. When the test begins, the trigger sensor 5 senses and triggers the magnet 12, triggering once per cycle and recording the wheel speed information; the wheel rim drives the rotary bearing 3 to rotate, and the internal wheel speed sensor 4 and radial magnet 11 generate relative rotational motion, generating wheel speed data.

Claims

1. A device for detecting wheel rotation speed, comprising a cylindrical bearing housing, characterized in that, A gear is mounted on the outer bottom of the bearing housing via a gear shaft at the center. An arc-shaped groove is machined on the gear's tooth surface. A guide post on the upper side of the telescopic pawl is inserted into the arc-shaped groove. Radial guide grooves are symmetrically machined on the bottom of the bearing housing. A pin on the lower side of the telescopic pawl is inserted into the guide groove. A drive shaft is inserted into a hole at the bottom of the bearing housing. A drive gear is mounted on the outer end of the drive shaft, meshing with the gear. A ratchet is fixed on the drive shaft inside the bearing housing. A ratchet pawl is hinged to the bearing housing on one side of the ratchet via a ratchet fixing screw. A radial magnet is embedded in the center of the bottom of the bearing housing cavity. Fixing screws are symmetrically mounted on the bearing housing, securing the rotating bearing inside. A fixing shaft is mounted at the center of the rotating bearing, and a trigger sensor is mounted on the fixing shaft. A wheel speed sensor is mounted on the inner end of the fixing shaft. The outer end of the fixing shaft passes through the center of a circular cap and is fixed to the conduit. The cap is fixed at the opening of the bearing housing. A trigger magnet is mounted on the bearing housing.

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