Steering gear and sensor support thereof
By press-fitting the second mounting part of the sensor bracket onto the bearing, combined with the design of the limiting rod and the limiting block, the problems of sensor bracket loosening and insufficient ultrasonic welding strength are solved, achieving stable support and cost reduction, and making it suitable for high impact and vibration environments.
Patent Information
- Application Number
- CN202520491786.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-20
- Publication Date
- 2026-01-09
- Estimated Expiration
- 2035-03-20
AI Technical Summary
Existing sensor bracket fixing methods are prone to loosening or are costly, and ultrasonic welding strength is insufficient, failing to meet the requirements of high-impact and vibration environments.
The second mounting part is interference-fitted onto the bearing, and the diameter difference between the first and second through holes forms a step to achieve a stable connection with the outer ring of the bearing. It is supported and fixed by a limit rod and a limit block, avoiding screws or ultrasonic welding.
It achieves stable support for the sensor, avoids the defects of screw loosening and ultrasonic welding, reduces costs, and is suitable for high-impact and vibration environments.
Smart Images
Figure CN223778292U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of sensor mounting technology, specifically to a steering gear and its sensor bracket. Background Technology
[0002] Automobiles are currently the primary means of transportation for people. They integrate numerous electronic components, and many vehicle controls rely on automatic data acquisition. This necessitates various sensors, which are placed in required locations to collect data. Therefore, automotive sensor brackets are a common support structure in automobiles. Existing sensor brackets are mostly fixed using screws or ultrasonic welding. Screw fixing is prone to failure modes such as screw loosening and missing screws, and it is also more expensive. Ultrasonic welding, due to the plastic core, has lower strength and is only suitable for applications with low impact and vibration requirements. Utility Model Content
[0003] To address the aforementioned technical problems, this utility model proposes a steering gear and its sensor bracket, which is fixed to the bearing by interference fit of the second mounting part, achieving stable support for the sensor without the need for screws or ultrasonic welding.
[0004] The technical solution adopted by this utility model is as follows: A sensor bracket includes a first mounting part and a second mounting part. The first mounting part is provided with a limiting rod for cooperating with a sensor and a limiting block for cooperating with an end cover. The second mounting part extends axially along the side of the first mounting part away from the limiting rod. The first mounting part is provided with a first through hole. The second mounting part is provided with a second through hole for press-fitting with the outer ring of a bearing. The diameter of the second through hole is larger than the diameter of the first through hole.
[0005] The sensor bracket is fixed to the bearing by interference fit of the second mounting part. The step formed by the diameter difference between the first and second through holes abuts against the outer ring end face of the bearing, so that the second mounting part is firmly connected to the bearing. The sensor can be stably supported without the use of screws or ultrasonic welding. The first mounting part supports and fixes the sensor by a limiting rod.
[0006] Optionally, the inner peripheral wall of the second through hole is provided with a plurality of protrusions for interference fit with the outer ring of the bearing, and the plurality of protrusions are spaced apart along the inner peripheral wall of the second through hole.
[0007] The raised rib reduces the mating area between the second mounting part and the outer ring of the bearing, thereby reducing the impact of the dimensional accuracy of the second through hole on the bearing pressing force.
[0008] Optionally, the end of the first through hole opposite to the second through hole protrudes from the first mounting portion to form a boss.
[0009] Optionally, the first mounting part is provided with a bracket, and the bracket is provided with a groove for fixing the wire harness.
[0010] Optionally, the side of the first mounting part facing away from the limiting rod is provided with a plurality of reinforcing ribs, and the reinforcing ribs extend to the second mounting part.
[0011] Optionally, the first mounting part and the second mounting part are integrally formed, and the plurality of reinforcing ribs are spaced apart along the circumference of the first mounting part.
[0012] Optionally, the limiting rod is axially arranged along the first mounting portion, and the limiting rod includes a first limiting portion and a second limiting portion integrally formed and connected to the first limiting portion. The second limiting portion is connected to the first mounting portion, and the diameter of the first limiting portion is smaller than the diameter of the second limiting portion.
[0013] This utility model also discloses a steering gear, including an output shaft, an input shaft, a torque sensor, a bearing, an end cover, and the sensor bracket described above. The output shaft is coaxially connected to the input shaft, the torque sensor is fixedly connected to the input shaft, the inner ring of the bearing is fastened to the output shaft, and the outer ring of the bearing is fastened to the second mounting part. The torque sensor is provided with a first groove that cooperates with a limiting rod, the end cover is provided with a second groove that cooperates with a limiting block, and the end cover is provided with a lug connected to the housing along the circumferential direction.
[0014] Optionally, the end cap has an extension extending into the housing, the extension has a second slot, and the outer peripheral wall of the extension has an annular groove for mounting an O-ring, the O-ring being located between the extension and the inner wall of the housing.
[0015] The beneficial effects of this utility model are: the sensor bracket is fixed on the bearing by the interference fit of the second mounting part, and the step formed by the diameter difference between the first through hole and the second through hole abuts against the end face of the outer ring of the bearing, so that the second mounting part is firmly connected to the bearing. The sensor can be stably supported without the use of screws or ultrasonic welding. The first mounting part supports and fixes the sensor by the limiting rod. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the sensor bracket proposed in an embodiment of the present invention;
[0017] Figure 2 This is a schematic diagram of the reinforcing ribs of the sensor bracket proposed in an embodiment of this utility model;
[0018] Figure 3 This is a cross-sectional view of the steering gear proposed in an embodiment of the present utility model;
[0019] Figure 4This is a schematic diagram of the steering gear end cover proposed in an embodiment of the present utility model.
[0020] The labels in the attached drawings are as follows: 1. First mounting part; 2. Second mounting part; 3. Limiting rod; 4. First through hole; 5. Second through hole; 6. Protrusion; 7. Boss; 8. Bracket; 9. Groove; 10. Reinforcing rib; 11. First limiting part; 12. Output shaft; 13. Input shaft; 14. Torque sensor; 15. Bearing; 16. Limiting block; 17. End cover; 18. Second slot; 19. Extension part; 20. O-ring; 21. Housing; 22. Lug. Detailed Implementation
[0021] The present application will now be described in further detail with reference to the accompanying drawings and embodiments.
[0022] like Figures 1 to 3 As shown, this embodiment discloses a sensor bracket, including a first mounting part 1 and a second mounting part 2. The first mounting part 1 is provided with a limiting rod 3 for cooperating with a sensor and a limiting block 16 for cooperating with an end cap. The second mounting part 2 extends axially along the side of the first mounting part 1 opposite to the limiting rod 3. The first mounting part 1 is provided with a first through hole 4, and the second mounting part 2 is provided with a second through hole 5 for press-fitting with the outer ring of a bearing 15. The diameter of the second through hole 5 is larger than the diameter of the first through hole 4. The sensor bracket 8 is fixed to the bearing 15 by interference fit of the second mounting part 2. The step formed by the diameter difference between the first through hole 4 and the second through hole 5 abuts against the end face of the outer ring of the bearing 15, so that the second mounting part 2 is firmly connected to the bearing 15 without the need for screws or ultrasonic welding, and will not damage the sensor bracket 8 itself. The first mounting part 1 supports and fixes the sensor by the limiting rod 3.
[0023] like Figure 1 As shown, the inner peripheral wall of the second through hole 5 is provided with multiple protrusions 6 for interference fit with the outer ring of the bearing 15. These protrusions 6 are spaced apart along the inner peripheral wall of the second through hole 5. The protrusions 6 reduce the mating area between the second mounting part 2 and the outer ring of the bearing 15, thereby reducing the impact of the dimensional accuracy of the second through hole 5 on the pressing force of the bearing 15. The protrusions 6 can be made of elastic material, allowing the second mounting part 2 to be press-fitted with the outer ring of the bearing 15. One end of the first through hole 4, opposite to the second through hole 5, protrudes from the first mounting part 1 to form a boss 7. The boss 7 abuts against the sensor, ensuring synchronous movement between the sensor and the bracket 8.
[0024] like Figure 1 As shown, the first mounting part 1 is provided with a bracket 8, and the bracket 8 has a groove 9 for fixing the wire harness. The bracket 8 fixes the wire harness connected to the sensor.
[0025] like Figure 2As shown, the first mounting portion 1 has a plurality of reinforcing ribs 10 on the side opposite to the limiting rod 3, and the reinforcing ribs 10 extend to the second mounting portion 2. The reinforcing ribs 10 enhance the support strength of the sensor bracket 8. The first mounting portion 1 and the second mounting portion 2 are integrally formed, and the plurality of reinforcing ribs 10 are spaced apart circumferentially along the first mounting portion 1.
[0026] like Figure 1 As shown, the limiting rod 3 is axially arranged along the first mounting portion 1. The limiting rod 3 includes a first limiting portion 11 and a second limiting portion integrally formed and connected to the first limiting portion 11. The second limiting portion is connected to the first mounting portion 1, and the diameter of the first limiting portion 11 is smaller than the diameter of the second limiting portion. The first limiting portion 11 is engaged with a slot on the sensor.
[0027] like Figure 3 As shown, this utility model also discloses a steering gear, including an output shaft 12, an input shaft 13, a torque sensor 14, a bearing 15, an end cap 17, and the aforementioned sensor bracket 8. The output shaft 12 is coaxially connected to the input shaft 13, the torque sensor 14 is fixedly connected to the input shaft 13, the inner ring of the bearing 15 is fastened to the output shaft 12, and the outer ring of the bearing 15 is fastened to the second mounting part 2. The torque sensor 14 is provided with a groove that cooperates with a limiting rod 3. Due to the limited length of the input shaft 13, the sensor bracket 8 is mounted on the output shaft 12 via the bearing 15. The limiting rod 3 extends along the axial direction of the first mounting part 1 and cooperates with the groove on the torque sensor 14 to fix the torque sensor 14.
[0028] like Figure 4 As shown, the end cap 17 has a lug 22 connected to the housing 21 along its circumferential direction. The end cap 17 has an extension 19 extending into the housing 21. The extension 19 has a second retaining groove 18, and the outer peripheral wall of the extension 19 has an annular groove for mounting an O-ring 20. The O-ring 20 is located between the extension and the inner wall of the housing 21. The extension 19 and the O-ring 20 provide good sealing performance. Since the end cap is directly fixed to the housing with bolts, the second retaining groove 18 and the limiting block 16 cooperate with each other to prevent the sensor bracket from moving circumferentially, thereby fixing the sensor. When the O-ring 20 undergoes radial displacement in the input shaft 13 and the sensor bracket, the second retaining groove 18 and the limiting block 16 can also absorb energy.
[0029] It is understood that the specific embodiments described above are merely for explaining the relevant utility model and not for limiting the utility model. It should also be noted that, for ease of description, only the parts related to the utility model are shown in the accompanying drawings. Multiple technical solutions in the same embodiment, as well as multiple technical solutions in different embodiments, can be arranged and combined to form new technical solutions that do not contradict or conflict with each other. All equivalent structural transformations made based on the content of this utility model specification and drawings, directly or indirectly applied to other related technical fields, are similarly included within the protection scope of this utility model.
Claims
1. A sensor bracket, characterized in that, It includes a first mounting part and a second mounting part. The first mounting part is provided with a limiting rod for cooperating with a sensor and a limiting block for cooperating with an end cover. The second mounting part extends axially along the side of the first mounting part away from the limiting rod. The first mounting part is provided with a first through hole. The second mounting part is provided with a second through hole for press-fitting with the outer ring of a bearing. The diameter of the second through hole is larger than the diameter of the first through hole.
2. The sensor bracket according to claim 1, characterized in that, The inner peripheral wall of the second through hole is provided with a plurality of protrusions for interference fit with the outer ring of the bearing, and the plurality of protrusions are spaced apart along the inner peripheral wall of the second through hole.
3. The sensor bracket according to claim 1, characterized in that, The end of the first through hole that is opposite to the second through hole protrudes from the first mounting part to form a boss.
4. The sensor bracket according to claim 1, characterized in that, The first mounting part is provided with a bracket, and the bracket is provided with a groove for fixing the wire harness.
5. The sensor bracket according to claim 1, characterized in that, The first mounting part has multiple reinforcing ribs on the side opposite to the limiting rod, and the reinforcing ribs extend to the second mounting part.
6. The sensor bracket according to claim 5, characterized in that, The first mounting part and the second mounting part are integrally formed, and the plurality of reinforcing ribs are arranged at intervals along the circumference of the first mounting part.
7. The sensor bracket according to claim 1, characterized in that, The limiting rod is axially arranged along the first mounting part. The limiting rod includes a first limiting part and a second limiting part integrally formed and connected to the first limiting part. The second limiting part is connected to the first mounting part, and the diameter of the first limiting part is smaller than the diameter of the second limiting part.
8. A steering system, characterized in that, The device includes an output shaft, an input shaft, a torque sensor, a bearing, an end cap, a housing, and a sensor bracket as described in any one of claims 1 to 7. The output shaft is coaxially connected to the input shaft, the torque sensor is fixedly connected to the input shaft, the inner ring of the bearing is fastened to the output shaft, the outer ring of the bearing is fastened to the second mounting part, the torque sensor is provided with a first groove that cooperates with a limiting rod, the end cap is provided with a second groove that cooperates with a limiting block, and the end cap is provided with a lug connected to the housing in the circumferential direction.
9. The steering system according to claim 8, characterized in that, The end cap has an extension that extends into the housing. The extension has a second slot and an annular groove on its outer peripheral wall for mounting an O-ring. The O-ring is located between the extension and the inner wall of the housing.