Testing tool for steering angle sensor
By designing a test fixture for a steering angle sensor, the problem of simulating tests for different gear structures was solved, the mold opening cost was reduced, the air gap between the chip and the magnet was verified to meet the design requirements, the physical basis for sensor development was provided, and the feasibility and accuracy of the design were improved.
Patent Information
- Application Number
- CN202520209608.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-11
- Publication Date
- 2026-01-16
- Estimated Expiration
- 2035-02-11
AI Technical Summary
Existing technologies cannot effectively simulate steering angle sensors with different gear meshing structures, resulting in high mold costs and an inability to verify whether the air gap between the chip and the magnet meets design requirements.
A test fixture for a steering angle sensor was designed. Through an adjustable bracket structure and driven gear mounting method, the meshing of different gear structures and the air gap between the chip and the magnet are simulated. Machining is used to ensure coaxiality and meshing accuracy, avoiding mold opening costs.
This enabled low-cost gear meshing verification and air gap compliance checks, providing physical evidence of the product's preliminary performance, reducing development costs, and improving the feasibility of sensor design.
Smart Images
Figure CN223807894U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a kind of test tool, in particular to a kind of test tool of steering angle sensor. BACKGROUND
[0002] Steering angle sensor is an important part of automobile steering system, it can accurately provide steering wheel and steering shaft angle data, provide angle reference and steering basis for driver and steering assist system.
[0003] With the development of automobile, steering angle sensor is more and more various, and the angle tested is also different in size, most steering sensors use gear structure, and get angle signal through transmission ratio. Then the number of teeth of the corresponding driving teeth and driven teeth of different angle sensors is different.
[0004] Now a kind of test structure of steering angle sensor needs to be designed, to provide simple test condition for the design and development of angle sensor in early stage, whether it can meet the accuracy of sensor, redundancy and various performance requirements. Avoiding the cost of opening mould, verifying gear engagement and feasibility, verifying whether the air gap from chip to magnet meets and providing physical basis for preliminary performance of product, providing guarantee for further development of sensor. SUMMARY
[0005] The utility model provides a kind of test tool of steering angle sensor with simple structure, low cost, can effectively verify gear engagement and feasibility, whether the air gap from chip to magnet meets the design requirement of sensor, solve the technical problem of the existing technology for the design of different gear matching structure, cannot be simulated test, thereby improve the technical problem of the cost of opening mould.
[0006] The utility model discloses a test tool of steering angle sensor, including the pivot fixed on the work head, be equipped with driving gear installation structure on the pivot, be equipped with PCBA fixed support on one side of pivot, be equipped with support adjusting structure on PCBA fixed support, still be equipped with driven gear installation structure on PCBA fixed support, be equipped with PCBA board fixed structure outside driven gear installation structure. The distance between fixed support and pivot is adjusted through support adjusting structure, so that the gear structure of different adaptation can be provided. Driven gear installation structure is all processed through the machining mode, guarantees the coaxial degree, and the size tolerance is as small as possible. The magnet is installed in the driven gear, and the PCBA board is installed above the driven gear. The pivot drives the driving gear to rotate, and the driving gear is engaged with the driven gear. After rotating, the NS magnetic pole of the magnet changes, and the chip in the PCBA board senses the angle change by identifying the magnetic pole of the magnet. Thus, the steering angle sensor working condition is simulated, the mold opening cost is avoided, the gear engagement and feasibility are verified, whether the air gap from the chip to the magnet meets the product preliminary performance is verified, and the physical basis for the preliminary performance is provided. The guarantee for further development of the sensor is provided.
[0007] Preferably, the PCBA fixed support includes a horizontal mounting plate and a vertical mounting plate, the horizontal mounting plate is provided with a horizontal adjusting bolt, the horizontal adjusting bolt is connected with the horizontal mounting plate, the horizontal mounting plate is provided with the driven gear installation structure and the PCBA board fixed structure. The PCBA fixed support can be adjusted as a whole by an external motor, and then the distance between the horizontal mounting plate and the driving gear installation structure is accurately adjusted by the horizontal adjusting bolt, so that the engagement requirement is met.
[0008] Preferably, an arc groove is arranged at the position opposite to the pivot of the PCBA fixed support, a positioning cylinder corresponding to the arc groove is arranged on the pivot, and the driving gear is arranged above the cylinder. The positioning cylinder can be installed and determined on the pivot. The positioning cylinder is installed on the pivot, the positioning is performed, the concentricity of the driving gear and the driven gear installation structure on the fixed platform is packaged through the circular gap, the tolerance between the driving gear and the driven gear is minimized, so that the engagement of the driving gear and the driven gear is complete, and the top tooth or shallow engagement slip phenomenon is avoided.
[0009] Preferably, the driven gear installation structure includes a driven gear installation groove arranged on the PCBA fixed support, and a driven gear fixing shaft is arranged below the driven gear and installed in the groove.
[0010] Preferably, the driven gear mounting structure includes a driven gear mounting groove formed on the PCBA mounting bracket, an internal gear ring with interference fit in the driven gear mounting groove, an eccentric gear installed in the internal gear ring, an eccentric gear shaft formed above the eccentric gear, a driven gear shaft provided below the driven gear, a through hole provided at the center of the driven gear shaft, and a clearance fit between the eccentric gear shaft and the through hole.
[0011] Preferably, the PCBA board fixing structure includes a fixing post located outside the driven gear mounting groove. The fixing post is a stepped bolt post with a through hole on the PCBA board. The groove limits the radial displacement of the driven gear, and the PCBA board limits the axial displacement of the driven gear, ensuring the meshing transmission between the driven gear and the driving gear.
[0012] Preferably, a countersunk hole is provided at the center of the driven gear, and a magnet is installed in the countersunk hole.
[0013] Therefore, the test fixture for a steering angle sensor of this utility model has the following advantages: it is designed with multiple driven gear mounting structures, which can be adapted to different combination methods, reduce verification costs and avoid unnecessary mold opening and repair; the installation methods of the fixture can all be fixed by interference fit, bonding, bolts, etc., to avoid slippage and shaking, thus minimizing costs. Attached Figure Description
[0014] Figure 1 This is a three-dimensional schematic diagram of a test fixture for a steering angle sensor.
[0015] Figure 2 yes Figure 1 Exploded view. Detailed Implementation
[0016] The technical solution of the utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.
[0017] Example:
[0018] like Figure 1 and 2 As shown, a test fixture for a steering angle sensor includes a rotating shaft 1 fixed on a workbench. The rotating shaft 1 has a threaded hole at its center. A drive gear structure is sleeved on the rotating shaft 1. The drive gear structure includes a positioning cylinder 2 and a drive gear 3 mounted on top of the positioning cylinder 2.
[0019] A PCBA fixing support is installed on one side of the rotating shaft 1, and the PCBA fixing support comprises a horizontal mounting plate 5 and a vertical mounting plate 8. The horizontal mounting plate 5 is provided with horizontal adjusting bolts 7, which are connected with the horizontal mounting plate 5. The horizontal mounting plate 5 is provided with a circular arc groove 15 corresponding to the positioning cylinder 2. A plurality of driven gear mounting grooves 14 are formed on the horizontal mounting plate 5. If a driven gear 6 is installed, the driven gear fixing shaft 10 can be installed in the driven gear mounting groove 14. The driven gear fixing shaft 10 is provided with the driven gear 6. If an eccentric gear 12 is installed, the inner gear ring 13 can be interference fitted in the driven gear mounting groove 14. The eccentric gear 12 is installed in the inner gear ring 13. The eccentric gear shaft 11 is formed above the eccentric gear 12. The driven gear shaft 10 is provided below the driven gear 6. The driven gear shaft 10 is provided with a through hole. The eccentric gear shaft 11 is clearance fitted with the through hole. The driven gear 6 is provided with a counterbore 18. The magnet is installed in the counterbore 18.
[0020] The driven gear mounting structure is universal. Different accessories can be selected according to different structures, such as eccentric gears or ordinary driven gears, to complete simulation tests.
[0021] Three fixing columns 16 are formed outside the driven gear mounting groove. The fixing column 16 is a stepped bolt column. The corresponding through hole is formed on the PCBA plate 4. After the driven gear 6 is installed, the PCBA plate 4 is installed above the driven gear. The PCBA plate 4 is installed on the fixing column to limit the axial movement of the driven gear. The chip is installed on the PCBA plate 4.
[0022] In use, the reference block (the reference block is a cylinder) is first installed on the rotating shaft. The reference block is concentrically aligned with the circular arc groove, so as to determine the relative position of the PCBA fixing support and the rotating shaft. Then the reference block is removed, and the positioning cylinder is installed. The driving gear is installed above the positioning cylinder. After the driving gear is installed, the driving gear 3 and the positioning cylinder 2 are fixed on the rotating shaft 1 by the bolt 17. The rotating shaft 1 is driven to rotate by the motor. The driven gear is installed on the horizontal mounting plate. The magnet is installed in the driven gear. After the driven gear is installed in the driven gear mounting groove, the PCBA plate is installed. The PCBA plate is fixed on the fixing column. The driving gear drives the driven gear to rotate, so as to drive the magnet to rotate. The chip senses the rotation angle of the magnet. The PCBA plate is led out by the flying wire mode to avoid the inconvenience of pin opening and installation. The chip signal is transmitted out, and the working state of the sensor is simulated.
[0023] The specific embodiments described herein are merely illustrative of the principles of the application. Numerous modifications and adaptations will be apparent to those skilled in the art without departing from the spirit or scope of the application.
Claims
1. A test fixture for a steering angle sensor, characterized by: The application relates to a rotating shaft fixed on a workbench, wherein a driving gear mounting structure is arranged on the rotating shaft, a PCBA fixing support is arranged on one side of the rotating shaft, a support adjusting structure is arranged on the PCBA fixing support, a driven gear mounting structure is further arranged on the PCBA fixing support, and a PCBA plate fixing structure is arranged outside the driven gear mounting structure.
2. The test fixture for a steering angle sensor of claim 1, wherein: The PCBA fixing support comprises a horizontal mounting plate and a vertical mounting plate, a horizontal adjusting bolt is arranged on the vertical mounting plate and connected with the horizontal mounting plate, a driven gear mounting structure and a PCBA plate fixing structure are arranged on the horizontal mounting plate.
3. A test fixture for a steering angle sensor according to claim 1 or 2, characterised in that: An arc groove is arranged at the position opposite to the rotating shaft of the PCBA fixing support, a positioning cylinder corresponding to the arc groove is arranged on the rotating shaft, and a driving gear is arranged above the cylinder.
4. The test tool for a steering angle sensor according to claim 1 or 2, characterized in that: The driven gear mounting structure comprises a driven gear mounting groove arranged on the PCBA fixing support, and a driven gear fixing shaft is arranged below the driven gear and mounted in the groove.
5. The test tool for a steering angle sensor according to claim 1 or 2, characterized in that: The driven gear mounting structure comprises a driven gear mounting groove arranged on the PCBA fixing support, an inner gear ring is interference-fitted in the driven gear mounting groove, an eccentric gear is mounted in the inner gear ring, an eccentric gear shaft is formed above the eccentric gear, a driven gear shaft is arranged below the driven gear, a through hole is arranged in the center of the driven gear shaft, and the eccentric gear shaft is gap-fitted with the through hole.
6. The test tool for a steering angle sensor according to claim 1 or 2, characterized in that: The PCBA plate fixing structure comprises a fixing column arranged outside the driven gear mounting groove, the fixing column is a stepped bolt column, and a through hole is arranged on the PCBA plate.
7. The test tool for a steering angle sensor according to claim 1 or 2, characterized in that: A sink hole is arranged in the center of the driven gear, and a magnet is mounted in the sink hole.