Slide guide with backlash compensation for vehicle steering

Abstract

The utility model discloses a slide block guide device with clearance compensation for vehicle steering, which comprises at least one connecting rod, at least one slide block, a guide device for placing the slide block and at least one connecting stud, on one hand, the connecting stud is rigidly connected to the connecting rod, on the other hand, the connecting stud is connected with the sliding block, and at least one radial rubber ring is arranged on the connecting stud in the radial direction and used for compensating the radial clearance between the connecting stud and the sliding block; and at least one axial rubber ring is axially arranged on the connecting stud and is used for compensating the axial clearance between the connecting stud and the sliding block. By arranging radial and axial rubber ring compensation, the zero-clearance fixing of the sliding block in the axial direction and the radial direction is realized, the clearance caused by directly fixing the sliding block and hinging the sliding block is avoided, the eccentric wear phenomenon caused by the axial and radial clearance of the sliding block is reduced, and meanwhile, the noise performance of the sliding block is optimized.

Description

Technical Field

[0001] The utility model belongs to the technical field of vehicle chassis and relates to a slider guiding device with clearance compensation for vehicle steering. Background Art

[0002] Existing known guiding mechanisms with sliders, one is that the slider is fixedly connected to the connecting rod. Due to no relative movement and the clearance of the device caused by tolerances, unilateral wear occurs. And due to tolerance reasons, there is a clearance between the slider and the guiding device, which is also likely to cause noise problems. Only the manufacturing precision can be improved to reduce the clearance, but the clearance still exists and the manufacturing cost is too high. The other is that the slider is connected to the connecting stud through a hinged form, and a rubber ring is arranged radially on part of the mechanism to achieve radial clearance compensation. However, due to the hinged connection form, there is always a clearance between the inner cavity of the slider and the outer cavity of the connecting stud due to manufacturing tolerances, resulting in the slider moving axially along the stud, leading to noise problems and abnormal wear. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a slider guiding device with clearance compensation for vehicle steering, so as to reduce eccentric wear and optimize noise problems.

[0004] The purpose of the utility model is realized through the following technical solutions:

[0005] A slider guiding device with clearance compensation for vehicle steering includes at least one connecting rod, at least one slider, a guiding device for placing the slider, and at least one connecting stud. The connecting stud is rigidly connected to the connecting rod on one hand and connected to the slider on the other hand. At least one radial rubber ring is arranged radially on the connecting stud for radial clearance compensation between the connecting stud and the slider; at least one axial rubber ring is arranged axially on the connecting stud for axial clearance compensation between the connecting stud and the slider.

[0006] As a further improvement of an embodiment of the utility model, a bolt hole adapted to the connecting stud is arranged on the connecting rod, and a first crimping surface is formed at the opening of the bolt hole. The lower end of the axial rubber ring abuts against the first crimping surface, so that a clearance fit is formed between the slider and the first crimping surface.

[0007] As a further improvement of an embodiment of the utility model, the connecting stud has a stud crimping surface and a thread stress surface. A channel for placing the connecting stud is arranged in the slider, and a second crimping surface adapted to the stud crimping surface is formed on the inner wall of the channel; when the connecting stud is installed in the bolt hole and the thread stress surface contacts the first crimping surface, the axial rubber ring exerts an axial extrusion on the slider, so that the stud crimping surface fits with the second crimping surface.

[0008] As a further improvement of an embodiment of the present utility model, wherein the stud pressing surface and the threaded force-bearing surface are parallel to each other and are both perpendicularly distributed to the central axis of the connecting stud.

[0009] As a further improvement of an embodiment of the present utility model, wherein a first circular groove is provided at the lower end of the slider, the axial rubber ring is arranged in the first circular groove, and the lower end of the axial rubber ring is exposed outside the slider and contacts the first crimping surface.

[0010] As a further improvement of an embodiment of the present utility model, wherein at least one second circular groove is circumferentially arranged on the connecting stud, the radial rubber ring is arranged in the second circular groove, and one end of the radial rubber ring is exposed outside the connecting stud, so that the radial rubber ring can form a radial extrusion between the inner wall of the channel and the connecting stud.

[0011] As a further improvement of an embodiment of the present utility model, wherein the slider is assembled by a first split slider and a second split slider. An axially distributed slider groove is provided on the first split slider, and a slider convex ridge adapted to the slider groove is provided on the second split slider; during assembly, the slider convex ridge is embedded into the slider groove to prevent axial movement between the first split slider and the second split slider along the connecting stud, while retaining the radial movement freedom, and cooperate with the radial rubber ring to achieve radial clearance compensation.

[0012] As a further improvement of an embodiment of the present utility model, wherein the guiding device includes a guiding groove, and a slider boss is provided on the slider adjacent to the groove wall of the guiding groove. The slider boss cooperates with the guiding device for friction and guiding to prevent the eccentric wear phenomenon caused by large-plane contact.

[0013] As a further improvement of an embodiment of the present utility model, wherein at least one direction channel is provided on the slider for storing oil to form an oil storage groove. The grease in the above oil storage groove can lubricate the groove wall of the guiding groove, reduce the friction of the slider moving in the guiding groove, and reduce the noise during the operation of the slider.

[0014] As a further improvement of an embodiment of the present utility model, wherein a slider snap groove for installing an induction sheet device is provided on the slider, and the induction sheet device can be used in cooperation with an eddy current type sensor.

[0015] Adopting the above technical solution, the following beneficial effects are achieved: By setting the compensation of the radial and axial rubber rings, zero-clearance fixation of the slider in the axial and radial directions is realized, avoiding the clearances brought by directly fixing the slider and the articulated slider, reducing the eccentric wear phenomenon of the slider caused by axial and radial clearances, and simultaneously optimizing its noise performance. Brief Description of the Drawings

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only exemplary, and for those of ordinary skill in the art, without creative efforts, other implementation drawings can also be obtained based on the provided drawings.

[0017] The structures, ratios, sizes, etc. shown in this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention. Therefore, they do not have technical essence. Any modification of the structure, change in the ratio relationship, or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope that can be covered by the technical content disclosed in the present invention.

[0018] Figure 1 It is a schematic diagram of the first state structure provided by the present invention.

[0019] Figure 2 It is Figure 1 a top view schematic diagram of

[0020] Figure 3 It is an exploded schematic diagram of the slider and the connecting stud assembly provided by the present invention.

[0021] Figure 4 It is a cross-sectional schematic diagram of the slider and the connecting stud assembled on the connecting rod provided by the present invention.

[0022] Figure 5 It is Figure 4 a schematic diagram of the connecting rod in

[0023] Figure 6 It is Figure 4 a schematic diagram of the connecting stud in

[0024] Figure 7 It is Figure 4 a schematic diagram of the slider in

[0025] In the figure:

[0026] 1. Connecting rod;

[0027] 11. Bolt hole; 12. First crimping surface;

[0028] 2. Slider;

[0029] 21. Second crimping surface; 22. First circular groove; 23. Slide block groove; 24. Slide block convex ridge; 25. Slide block boss; 26. Oil storage groove; 27. Slide block snap groove; 28. Channel

[0030] 3. Guide device

[0031] 4. Connecting stud

[0032] 41. Stud crimping surface; 42. Thread stress surface; 43. Second circular groove

[0033] 5. Radial rubber ring

[0034] 6. Axial rubber ring

[0035] 7. First split slide block

[0036] 8. Second split slide block Detailed implementation mode

[0037] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The following will describe the present utility model in detail with reference to the drawings and in combination with the embodiments.

[0038] It should be pointed out that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs.

[0039] In the present utility model, unless otherwise stated, the orientation words such as "upper, lower, top, bottom" are usually in the direction shown in the drawings, or in the vertical, perpendicular or gravitational direction of the component itself; similarly, for the convenience of understanding and description, "inner, outer" refer to the inner and outer of the contour of each component itself, but the above orientation words are not used to limit the present utility model.

[0040] Embodiment

[0041] See Figures 1-7 As shown, a slider guide device with clearance compensation for vehicle steering includes a connecting rod 1, a slider 2, a guide device 3 for placing the slider 2, and a connecting stud 4. Among them, the connecting rod 1 is an important connecting component of the whole device and plays a role in transmitting the steering force. The guide device 3 provides a space for placing and sliding the slider 2 to ensure that the slider 2 can slide stably along a predetermined trajectory.

[0042] The connecting stud 4 is a key component for connecting the slider 2 and the connecting rod 1. On the one hand, it is rigidly connected to the connecting rod 1, and on the other hand, it is connected to the slider 2 to realize the connection between the slider 2 and the connecting rod 1.

[0043] To compensate for the radial clearance between the slider 2 and the connecting stud 4, at least one radial rubber ring 5 is radially provided on the connecting stud 4. The radial rubber ring 5 can be an O-ring, and its material has good elasticity and wear resistance, and can closely fit in the radial clearance between the connecting stud 4 and the slider 2, effectively eliminating the radial clearance.

[0044] Similarly, to compensate for the axial clearance, at least one axial rubber ring 6 is axially provided on the connecting stud 4. The axial rubber ring 6 can be an O-ring and is installed on the connecting stud 4 by interference fit or other means, and is in close contact with the end face of the slider 2 to achieve compensation for the axial clearance.

[0045] Through the compensation by setting the radial and axial rubber rings, the slider 2 is fixed with zero clearance axially and radially. This design avoids the clearance problems caused by directly fixing the slider and the articulated slider, greatly reduces the eccentric wear of the slider 2 caused by axial and radial clearances, improves the service life of the slider 2 and the steering accuracy of the entire device, and provides a strong guarantee for the stability and reliability of vehicle steering.

[0046] Specifically, as shown in Figures 4-6 , a bolt hole 11 adapted to the connecting stud 4 is carefully provided on the connecting rod 1. The size and shape of the bolt hole 11 are precisely designed to ensure that the connecting stud 4 can be smoothly and firmly installed therein. A first crimping surface 12 is formed at the opening of the bolt hole 11, and the surface of the first crimping surface 12 is flat and smooth, providing a good contact basis for the installation and fitting of subsequent components. The axial rubber ring 6 is cleverly arranged at the connection between the connecting stud 4 and the connecting rod 1, and its lower end tightly abuts against the first crimping surface 12. This setting method forms a clearance fit between the slider 2 and the first crimping surface 12, which not only ensures that the slider 2 has a certain movement space but also provides conditions for subsequent axial clearance compensation.

[0047] The connecting stud 4 has a stud crimping surface 41 and a threaded force-bearing surface 42. The stud crimping surface 41 is the key part where the connecting stud 4 is in close contact with the slider 2, and its surface is finely processed to ensure the tightness and stability of the fit; the threaded force-bearing surface 42 bears the force from the connecting rod 1 during the installation of the connecting stud 4. A channel 28 for placing the connecting stud 4 is provided inside the slider 2, and a second crimping surface 21 adapted to the stud crimping surface 41 is formed on the inner wall of the channel 28.

[0048] When the connecting stud 4 is installed into the bolt hole 11 and the threaded force-bearing surface 42 is in close contact with the first crimping surface 12, the axial rubber ring 6 will exert an axial pressure on the slider 2 due to being squeezed. This pressure makes the stud crimping surface 41 and the second crimping surface 21 fit tightly, thus effectively compensating for the axial clearance.

[0049] Preferably, the stud pressing surface 41 and the threaded force-bearing surface 42 are parallel to each other and both are perpendicularly distributed to the central axis of the connecting stud 4. This design enables the connecting stud 4 to be evenly stressed during the installation process, can better ensure the fitting effect between the stud pressing surface 41 and the second crimping surface 21, further improves the stability and reliability of the device, and reduces component wear and failures caused by clearance problems.

[0050] Furthermore, a first annular groove 22 is specifically provided at the lower end of the slider 2. The size and shape of the first annular groove 22 are adapted to the axial rubber ring 6 and are precisely formed by machining to ensure that the axial rubber ring 6 can be stably installed therein. The axial rubber ring 6 is placed in the first annular groove 22, and its lower end is exposed outside the slider 2. When the device is assembled, the exposed lower end of the axial rubber ring 6 is in close contact with the first crimping surface 12 to effectively compensate for the axial clearance.

[0051] In this embodiment, two second annular grooves 43 are circumferentially provided on the connecting stud 4. These two second annular grooves 43 are precisely machined by machining means such as turning, and their depth and width are designed according to the size of the radial rubber ring 5 to ensure that the radial rubber ring 5 can be accurately embedded. The radial rubber ring 5 is placed in the second annular groove 43, and one end of it is exposed outside the connecting stud 4. When the connecting stud 4 is inserted into the channel in the slider 2, the exposed part of the radial rubber ring 5 will be squeezed by the inner wall of the channel, thereby forming a radial extrusion between the inner wall of the channel and the connecting stud 4 to achieve compensation for the radial clearance.

[0052] Combined Figure 3 As shown, the slider 2 adopts a split structure design and is assembled by a first split slider 7 and a second split slider 8. An axially distributed slider groove 23 is carefully provided on the first split slider 7, and the slider groove 23 is formed by machining means such as milling and has precise dimensions. A slider ridge 24 adapted to the slider groove 23 is correspondingly provided on the second split slider 8, and the shape and size of the slider ridge 24 match those of the slider groove 23. Then the first split slider 7 and the second split slider 8 are locked with bolts to form the slider 2.

[0053] During the assembly process, the slider ridge 24 is inserted into the slider groove 23. This fitting structure can effectively prevent the first split slider 7 and the second split slider 8 from moving axially along the connecting stud 4, while retaining the radial movement freedom, and further cooperate with the radial rubber ring 5 to achieve radial clearance compensation.

[0054] In this embodiment, the guiding device 3 mainly includes a guiding groove, and the shape and size of the guiding groove are designed according to the specific requirements of the vehicle steering system. Generally, it is a groove structure with a certain length and a specific cross-section, and its groove wall is finely machined and the surface is flat and smooth to ensure that the slider 2 can slide smoothly therein.

[0055] A slider boss 25 is provided on the slider 2 adjacent to the groove wall of the guiding groove. The slider boss 25 is a protruding structure formed by locally thickening the surface of the slider 2 or adopting a special forming process. In this embodiment, its shape is a disc-shaped structure. During the sliding process of the slider 2, the slider boss 25 is in close fit with the groove wall of the guiding device 3, undertaking the main friction and guiding functions. This design avoids the large-plane contact between the slider 2 and the guiding groove, thereby effectively preventing the eccentric wear phenomenon caused by the large-plane contact and improving the service life of the slider 2 and the guiding device 3.

[0056] At least one direction channel is also provided on the slider 2 for storing oil to form an oil storage groove 26. The direction channel can be processed on the surface of the slider 2 by milling, laser engraving, etc., and its depth and width are reasonably designed according to the oil storage capacity and lubrication requirements. The grease in the oil storage groove 26 can be evenly smeared on the groove wall of the guiding groove during the movement of the slider 2, forming a lubricating film, reducing the friction force when the slider 2 moves in the guiding groove, reducing the noise during the operation of the slider, and making the sliding of the slider 2 more stable.

[0057] In addition, a slider snap groove 27 for installing an induction sheet device is provided on the slider 2. The shape and size of the slider snap groove 27 match those of the induction sheet device, and the induction sheet device is firmly installed on the slider 2 by snap connection. This induction sheet device can be used in cooperation with an eddy current type sensor. When the slider 2 moves, the position of the induction sheet device changes, and the eddy current type sensor can detect this change in real time and transmit the signal to the control unit of the vehicle steering system to achieve precise monitoring and control of the position of the slider 2.

[0058] The slider guiding device provided by the present utility model realizes the zero-clearance fixation of the slider 2 in the axial and radial directions by respectively providing rubber ring compensation structures in the radial and axial directions on the connecting stud 4. Compared with the way of directly fixing the slider, it avoids the clearance problems caused by machining errors, assembly looseness, etc.; compared with the hinged slider structure, it also eliminates the clearance generated due to wear at the hinged part.

[0059] This zero-clearance fixation design effectively reduces the eccentric wear phenomenon of the slider 2 caused by axial and radial clearances. During the vehicle steering process, the slider can slide more stably and accurately along the guiding device, reducing the risk of component damage caused by eccentric wear. At the same time, since the slider slides more smoothly, the friction and collision with the guiding device are reduced, thereby optimizing the noise performance during the operation of the device and providing a quieter and more reliable working environment for the vehicle steering system.

[0060] Obviously, the embodiments described above are only a part of the embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without creative efforts shall fall within the protection scope of the present invention.

[0061] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they specify the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0062] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0063] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A slider guiding device with clearance compensation for vehicle steering, comprising at least one connecting rod, at least one slider, a guiding device for placing the slider, and at least one connecting stud, wherein the connecting stud is rigidly connected to the connecting rod on one hand and connected to the slider on the other hand, characterized in that, At least one radial rubber ring is radially arranged on the connecting stud for compensating the radial clearance between the connecting stud and the slider; at least one axial rubber ring is axially arranged on the connecting stud for compensating the axial clearance between the connecting stud and the slider.

2. The slider guiding device according to claim 1, characterized in that: A bolt hole adapted to the connecting stud is arranged on the connecting rod, and a first crimping surface is formed at the opening of the bolt hole. The lower end of the axial rubber ring abuts against the first crimping surface, so that there is a clearance fit between the slider and the first crimping surface.

3. The slider guiding device according to claim 2, characterized in that: The connecting stud has a stud crimping surface and a threaded stress surface. A channel for placing the connecting stud is arranged in the slider, and a second crimping surface adapted to the stud crimping surface is formed on the inner wall of the channel. When the connecting stud is installed in the bolt hole and the threaded stress surface contacts the first crimping surface, the axial rubber ring exerts an axial extrusion on the slider, so that the stud crimping surface fits with the second crimping surface.

4. The slider guiding device according to claim 3, wherein: The stud crimping surface and the threaded stress surface are parallel to each other and are both perpendicular to the central axis of the connecting stud.

5. The slider guiding device according to claim 3, characterized in that: A first annular groove is arranged at the lower end of the slider, the axial rubber ring is arranged in the first annular groove, and the lower end of the axial rubber ring is exposed outside the slider and contacts the first crimping surface.

6. The slider guiding device according to claim 3, characterized in that: At least one second annular groove is circumferentially arranged on the connecting stud, the radial rubber ring is arranged in the second annular groove, and one end of the radial rubber ring is exposed outside the connecting stud, so that the radial rubber ring can form a radial extrusion between the inner wall of the channel and the connecting stud.

7. The slider guiding device according to any one of claims 1 to 6, characterized in that: The slider is assembled by a first split slider and a second split slider. A slider groove distributed axially is arranged on the first split slider, and a slider convex rib adapted to the slider groove is arranged on the second split slider. During assembly, the slider convex rib is embedded into the slider groove to prevent the first split slider and the second split slider from moving axially along the connecting stud.

8. The slider guiding device according to claim 7, characterized in that: The guiding device includes a guiding groove. A slider boss is arranged on the slider adjacent to the groove wall of the guiding groove, and the slider boss cooperates with the guiding device for friction and guiding.

9. The slider guiding device according to claim 7, characterized in that: At least one direction channel is arranged on the slider for storing oil to form an oil storage groove.

10. The slider guiding device according to claim 7, characterized in that: A slider snap groove for installing an induction sheet device is arranged on the slider.

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