A rollover prevention support structure for a vehicle steering gear and a vehicle
By introducing an anti-rollover support structure and a clearance compensation component into the vehicle steering system, the problem of detection accuracy caused by support structure wear was solved, stable detection of sensor position information was achieved, and the accuracy of the linear displacement sensor was improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI TONGYU AUTOMOTIVE TECHNOLOGY CO LTD
- Filing Date
- 2025-07-03
- Publication Date
- 2026-07-03
AI Technical Summary
In the prior art, the gap between the support structure and the housing changes due to wear, which affects the detection accuracy of the linear displacement sensor in terms of the position information of the sensing element.
Design an anti-overturning support structure, including an anti-overturning support component and a gap compensation component. The anti-overturning support component is connected to the movable shaft through a fixing member. The support component is equipped with a sensing plate, and a sensor body is installed inside the housing. The gap compensation component consists of a sliding pad and an elastic pad. The sliding pad contacts the inner wall of the housing, and the elastic pad provides pressure to keep the gap stable.
This effectively prevents the sensor from flipping due to circumferential force, maintains air gap stability, improves the sensor's detection accuracy of the sensor's position information, and reduces absolute position error caused by wear.
Smart Images
Figure CN224447874U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of automotive technology, and more specifically, to an anti-rollover support structure for a vehicle steering system and a vehicle. Background Technology
[0002] The rear wheel steering system of a car is responsible for controlling the steering action of the rear wheels. It typically uses linear displacement sensors to detect the movement of moving shafts such as lead screws, connecting rods, and connecting shafts in the steering system.
[0003] In a linear displacement sensor, the sensor body is usually fixedly connected to the steering gear housing, and a sensing plate is set on the movable shaft. A certain air gap is left between the sensing plate and the sensor body, so that the sensor can detect the absolute position information of the sensing plate by using the eddy current effect, thereby realizing the detection of the movement position of the movable shaft.
[0004] In the prior art, in order to maintain this air gap value, a support structure is usually provided on the movable shaft to fix the sensing element. However, as the structure wears down, the gap between the support structure and the housing will change. This gap change will disrupt the constraint balance of the support structure on the sensing element, thereby affecting the sensor's detection accuracy of the sensing element's position information. Utility Model Content
[0005] The purpose of this invention is to provide an anti-rollover support structure for a vehicle steering system and a vehicle, in order to improve the technical problem in the prior art where the gap between the support structure and the housing changes due to wear, thereby affecting the accuracy of the sensor in detecting the position information of the sensing element.
[0006] The embodiments of this utility model can be implemented as follows:
[0007] In a first aspect, this utility model provides an anti-rollover support structure for a vehicle steering gear, including a housing, a movable shaft movably disposed within the housing, and an anti-rollover support assembly disposed on the movable shaft;
[0008] The anti-rollover support assembly includes a fixing member and a support member. The support member is connected to the movable shaft through the fixing member. A sensing plate is provided on the support member, and a sensor body for sensing the sensing plate is provided on the housing.
[0009] An installation gap is formed between the support member and the inner wall of the housing, and a gap compensation component is provided within the installation gap.
[0010] In an optional embodiment, the gap compensation component includes a sliding pad, and the sliding pad has a plurality of limiting protrusions on the side near the support member. The support member has a plurality of limiting holes, and the limiting protrusions are engaged in the limiting holes.
[0011] In an optional embodiment, the gap compensation assembly further includes an elastic pad disposed between the sliding pad and the support member, and provides pressure to one side of the sliding pad to cause the sliding pad to abut against the inner wall of the housing.
[0012] In an optional embodiment, the support member is provided with a fixing hole, and the elastic pad is disposed in the fixing hole.
[0013] In an optional embodiment, the elastic washer is any one of a spring, a disc spring, or a wave spring.
[0014] In an optional embodiment, a step is provided on the inner side of the support member, and the fixing member abuts against the step to fix the support member.
[0015] In an optional embodiment, the fastener includes a fixing portion and an extension connected to the fixing portion;
[0016] The fixing part abuts against the step, and the extension part is threadedly connected to the movable shaft.
[0017] In an optional embodiment, the sensing element is riveted to the upper end of the support member.
[0018] In an optional embodiment, the housing includes a first receiving cavity for housing the movable shaft and a second receiving cavity for housing the anti-rollover support assembly; the inner walls of both the first and second receiving cavities are coated with grease.
[0019] Secondly, this utility model provides a vehicle including the anti-rollover support structure for the vehicle steering system described in any of the foregoing embodiments.
[0020] The beneficial effects of the anti-rollover support structure for vehicle steering systems and the vehicle provided by this embodiment of the utility model include:
[0021] The anti-rollover support structure for vehicle steering systems provided by this utility model includes a movable shaft disposed within a housing and an anti-rollover support assembly disposed on the shaft. On the one hand, by providing the anti-rollover support assembly, the sensor element is prevented from rolling due to the circumferential force of the movable shaft, thus affecting the sensor detection accuracy. On the other hand, by providing a gap compensation assembly in the installation gap between the support and the inner wall of the housing, the support can always abut against the inner wall of the housing through the gap compensation assembly, thereby avoiding the influence of gaps caused by structural wear on the sensor element. Attached Figure Description
[0022] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0023] Figure 1 This is a schematic diagram of the overall structure of the anti-rollover support structure for a vehicle steering gear provided in this embodiment;
[0024] Figure 2 This is a partial assembly diagram of the anti-rollover support structure for a vehicle steering system provided in this embodiment;
[0025] Figure 3 This is a cross-sectional structural diagram of the anti-rollover support component in the anti-rollover support structure for a vehicle steering gear provided in this embodiment;
[0026] Figure 4 This is a three-dimensional assembly diagram of the gap compensation component in the anti-rollover support structure for a vehicle steering gear provided in this embodiment.
[0027] Icons: 10 - Housing; 11 - Sensor body;
[0028] 20 - Movable axis;
[0029] 30 - Anti-tilting support assembly; 31 - Fixing component; 311 - Fixing part; 312 - Extension part; 32 - Support component; 321 - Limiting hole; 322 - Fixing hole; 323 - Step; 33 - Sensing plate;
[0030] 40 - Gap compensation component; 41 - Sliding pad; 411 - Limiting protrusion; 42 - Elastic pad. Detailed Implementation
[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0033] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0034] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0035] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.
[0036] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.
[0037] As autonomous driving iterates and evolves, people's demands for vehicle space and comfort are increasing, which makes vehicles larger overall. This inevitably leads to difficulties in turning and making U-turns on narrow and congested roads. To solve this problem, rear-wheel steering is gradually becoming more common in conventional vehicles.
[0038] Currently, the rear wheel steering system of automobiles is used to control the steering action of the rear wheels of the car. It usually uses linear displacement sensors to detect the movement position of the moving shafts such as lead screws, connecting rods, and connecting shafts in the steering system.
[0039] The linear displacement sensor detects the absolute position information of the sensing element based on the eddy current effect, thereby realizing the detection of the moving position of the movable shaft. In order to ensure the accuracy of the detection, the air gap between the sensing element and the sensor needs to be maintained at 0.7mm±0.4mm.
[0040] In the operation of the rear-wheel steering system, the motor receives a signal and outputs torque. This torque is amplified and reduced in speed via a pulley structure, transmitting power to the nut. The rotation of the nut then transmits power to the movable shaft (such as a lead screw), causing it to move axially. This, in turn, causes the tie rod to push the wheel, achieving steering. During this process, the movable shaft generates a certain circumferential force, leading to its circumferential movement. This can potentially cause the sensing element to move circumferentially, affecting the displacement sensor's stroke sensing. Therefore, to maintain the aforementioned air gap, an anti-rollover support structure is required.
[0041] The following detailed description, through embodiments and in conjunction with the accompanying drawings, details the anti-rollover support structure for vehicle steering systems provided by this utility model, the overall structure of the vehicle, its working principle, and the technical effects achieved.
[0042] This utility model provides an anti-rollover support structure for a vehicle steering gear and a vehicle equipped with the anti-rollover support structure. The anti-rollover support structure is installed in the vehicle steering gear and is used to improve the detection accuracy of the position of the moving shaft by the linear displacement sensor in the steering gear.
[0043] It should be noted that the anti-rollover support structure provided in this embodiment can also be applied to front wheel steering gear products that use linear displacement sensors to improve support and detection accuracy. In this embodiment, an anti-rollover support structure for a vehicle's rear wheel steering system is used as an example.
[0044] Please refer to Figure 1 and Figure 2 The anti-rollover support structure for vehicle steering provided by this utility model includes a housing 10, a movable shaft 20 movably disposed within the housing 10, and an anti-rollover support assembly 30 disposed on the movable shaft 20. A sensor body 11 is disposed on the housing 10. In actual operation, the rear wheel steering gear is fixed to the rear subframe of the vehicle through the mounting point of the housing 10.
[0045] Please see Figure 3 In this embodiment, the anti-rollover support assembly 30 includes a fixing member 31 and a support member 32 connected to the fixing member 31. The support member 32 is fixedly connected to the movable shaft 20 through the fixing member 31, so that when the movable shaft 20 moves upward along its axial direction, the support member 32 can be moved together through the fixing member 31. At the same time, a sensing plate 33 is provided on the support member 32, and a required air gap value is left between the sensing plate 33 and the sensor body 11.
[0046] The aforementioned support member 32 has a hollow structure, and its upper end is provided with a snap-fit structure and is riveted to the sensing sheet 33; a step 323 is provided on the inner side of the support member 32, and the fixing member 31 abuts against the step 323 and fixes the support member 32 to the movable shaft 20.
[0047] Furthermore, the fixing member 31 includes a fixing part 311 and an extension part 312 connected to the fixing part 311; wherein, the fixing part 311 abuts against the step 323, and the extension part 312 is threadedly connected to the movable shaft 20, so that the support member 32 can be fixed on the movable shaft 20 by the fixing member 31 and move with the movable shaft.
[0048] In actual operation, the anti-rollover support component 30 is provided to prevent the sensing plate 33 from being rolled over by the circumferential force of the movable shaft 20.
[0049] In actual operation, the movable shaft 20 drives the support 32 to reciprocate within the housing 10 via the fixing member 31. To prevent the support 32 (or the sealing structure provided on the outside of the support 32) from becoming larger due to wear, thus causing the sensing plate 33 to flip under the circumferential force of the movable shaft 20, and consequently leading to the absolute position error caused by the increased air gap, in this embodiment, an installation gap is also formed between the support 32 and the inner wall of the housing 10. A gap compensation component 40 is provided in the installation gap to fill the gap between the support 32 and the inner wall of the housing 10, so that the gap between the support 32 and the inner wall of the housing 10 remains unchanged.
[0050] Please see Figure 4 Specifically, the aforementioned gap compensation component 40 includes two sliding pads 41 disposed on both sides of the contact between the support member 32 and the inner wall of the housing 10. The sliding pads 41 are made of wear-resistant plastic and are disposed between the inner wall of the housing 10 and the support member 32 to prevent the support member 32 from rubbing against the housing 10 and causing wear.
[0051] The sliding pad 41 is provided with multiple limiting protrusions 411 on the side near the support member 32. Correspondingly, the support member 32 is provided with multiple matching limiting holes 321. When the limiting protrusions 411 are correspondingly engaged in the limiting holes 321, the sliding pad 41 is fixed on the support member 32.
[0052] For example, since the cross-section of the support member 32 is approximately rectangular, the number of limiting protrusions 411 and limiting holes 321 are both four, and they are located near the four apex corners of the rectangular surface.
[0053] To further prevent changes in the gap between the support 32 and the inner wall of the housing 10 due to wear, in this embodiment, the gap compensation assembly 40 also includes an elastic pad 42 disposed between the sliding pad 41 and the support 32. The elastic pad 42 is used to provide pressure to one side of the sliding pad 41 so that the sliding pad 41 always abuts against the inner wall of the housing 10.
[0054] Specifically, a fixing hole 322 is provided at the center of the cross-section of the support member 32, and the aforementioned elastic pad 42 is disposed in the fixing hole 322. It is understood that when the elastic pad 42 is disposed in the fixing hole 322, the highest point of the elastic pad 42 should be slightly higher than the edge of the fixing hole 322, so as to abut against the sliding pad 41 and apply pressure to the sliding pad 41.
[0055] In this embodiment, two elastic pads 42 are provided, each corresponding to one of the two sliding pads 41.
[0056] Furthermore, the elastic pad 42 can be made of elastic metal. In this embodiment, the elastic pad 42 can be any one of a spring, disc spring, or wave spring. In other embodiments, the elastic pad 42 can also be other elastic structures, as long as it can apply a pressure toward the inner wall of the housing 10 to the sliding pad 41.
[0057] To reduce wear on the sliding pad 41, in this embodiment, the housing 10 includes a first receiving cavity for housing the movable shaft 20 and a second receiving cavity for housing the anti-rollover support assembly 30; the inner walls of both the first and second receiving cavities are coated with grease to reduce the amount of material that causes frictional loss between the movable shaft 20 and the housing 10, and between the sliding pad 41 and the housing 10, during relative sliding, thereby improving the service life of each component.
[0058] Additionally, it should be noted that in this embodiment, the movable shaft 20 can refer to shaft structures such as lead screws, connecting rods, or connecting shafts in the steering gear.
[0059] The anti-rollover support structure for vehicle steering systems provided by this utility model works on the following principle:
[0060] When a movement command is received from the vehicle domain controller, the rear wheel steering controller motor assembly drives the movable shaft 20 to reciprocate left and right along its axial direction via a belt structure. Since the support member 32 is fixed to the movable shaft 20 by the fixing member 31, the support member 32 will reciprocate left and right along the groove of the first receiving cavity of the housing 10. At this time, the sensing element 33 also reciprocates with the movable shaft 20. During the movement, the upper surface of the sensing element 33 and the sensor body 11 maintain the required air gap. Utilizing the eddy current effect, the sensor body 11 can continuously detect the absolute position information of the sensing element 33, thus feeding it back to the domain controller. To avoid the gap caused by the wear of the sliding shim 41 causing damage to the support member 32 and the sensing element 33, the following measures are taken: The flipping of the sensor 33 causes an increase in the gap between the support 32 and the inner wall of the housing 10, resulting in an absolute position error. An elastic pad 42 is also provided between the support 32 and the sliding pad 41. When the product is in a free assembly state, the elastic pad 42 supports the sliding pad 41 and keeps it close to the inner surface of the steering housing 10. When the sliding pad 41 wears, the elasticity of the elastic pad 42 can provide a certain pressure to the sliding pad 41, thus allowing the sliding pad 41 to keep close to the inner wall of the housing 10 (i.e., the second receiving space channel). In addition, the elastic pad 42 can be set to a stackable range according to the wear of the sliding pad 41 after durability, so that the sensor 33 will not cause an error in the absolute position information due to system durability loss.
[0061] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.
Claims
1. A rollover-preventing support structure for a vehicle steering knuckle, characterized by, It includes a housing (10), a movable shaft (20) movably disposed within the housing (10), and an anti-overturning support assembly (30) disposed on the movable shaft (20). The anti-rollover support assembly (30) includes a fixing member (31) and a support member (32). The support member (32) is connected to the movable shaft (20) through the fixing member (31). A sensing plate (33) is provided on the support member (32), and a sensor body (11) for sensing the sensing plate (33) is provided on the housing (10). An installation gap is formed between the support member (32) and the inner wall of the housing (10), and a gap compensation component (40) is provided in the installation gap.
2. The roll-over prevention support structure for a vehicle diverter according to claim 1, characterized by, The gap compensation component (40) includes a sliding pad (41), and the sliding pad (41) has a plurality of limiting protrusions (411) on the side near the support member (32). The support member (32) has a plurality of limiting holes (321) respectively, and the limiting protrusions (411) are engaged in the limiting holes (321).
3. The roll-over prevention support structure for a vehicle diverter according to claim 2, characterized by, The gap compensation assembly (40) further includes an elastic pad (42) disposed between the sliding pad (41) and the support (32), and provides pressure to one side of the sliding pad (41) to make the sliding pad (41) abut against the inner wall of the housing (10).
4. The roll-over prevention support structure for a vehicle diverter according to claim 3, characterized by, The support member (32) is provided with a fixing hole (322), and the elastic pad (42) is disposed in the fixing hole (322).
5. The roll-over prevention support structure for a vehicle diverter according to claim 3, characterized by, The elastic pad (42) can be any one of a spring, disc spring, or wave spring.
6. The roll-over prevention support structure for a vehicle diverter according to claim 1, characterized by, The support member (32) has a step (323) on its inner side, and the fixing member (31) abuts against the step (323) to fix the support member (32).
7. The roll-over prevention support structure for a vehicle diverter according to claim 6, characterized by, The fastener (31) includes a fastening part (311) and an extension part (312) connected to the fastening part (311). The fixing part (311) abuts against the step (323), and the extension part (312) is threadedly connected to the movable shaft (20).
8. The roll-over prevention support structure for a vehicle diverter according to claim 1, characterized by, The sensing element (33) is riveted to the upper end of the support member (32).
9. The anti-rollover support structure for a vehicle steering system according to claim 1, characterized in that, The housing (10) includes a first receiving cavity for housing the movable shaft (20) and a second receiving cavity for housing the anti-rollover support assembly (30); the inner walls of the first receiving cavity and the second receiving cavity are coated with grease.
10. A vehicle characterized by comprising: Including the anti-rollover support structure for a vehicle steering system as described in any one of claims 1-9.