Shaft telescopic self-aligning structure

Abstract

A telescopic self-aligning structure for a shaft includes a rod, a shaft, and a self-aligning assembly. One end of the rod has a guide hole with a limiting hole at its bottom. The shaft is located within the guide hole and includes a limiting end that slides into the limiting hole and a telescopic boss located at the opening of the guide hole. The self-aligning assembly includes a spring, a limiting ring, and a self-aligning ring sequentially sleeved on the shaft. One end of the spring abuts against the bottom of the guide hole, and the other end abuts against one side of the limiting ring. The inner circumferential wall of the limiting ring slides with the shaft, while its outer circumferential wall has a gap with the guide hole. The inner circumferential wall of the self-aligning ring has a gap with the shaft, and its outer circumferential wall slides with the guide hole. The side of the self-aligning ring facing the limiting ring has a conical surface, and the other side of the limiting ring abuts against the conical surface. The side of the self-aligning ring facing away from the limiting ring abuts against the telescopic boss. This solution, by adding a self-aligning assembly within the guide hole of the rod, ensures the concentricity of the limiting ring and the shaft relative to the guide hole.

Description

Technical Field

[0001] This utility model relates to the technical field of gear shifter accessories, and more specifically to a shaft telescopic self-aligning structure. Background Technology

[0002] As a core interactive component between the driver and the transmission, the reliability of the automotive gear shifter directly impacts driving experience and safety. Currently, the widely used push-rod type gear shifter mainly consists of a housing and a shift lever. The housing has a ball-and-socket structure at the top and a guide rail at the bottom. The shift lever rotates through a ball joint that engages with the ball-and-socket structure. Simultaneously, the end of the shift lever slides against the guide rail, which limits the rotation angle of the shift lever. However, in practical use, it has been found that when the shift lever rotates around the ball joint, manufacturing and assembly errors can cause fluctuations in the sliding fit between the end of the shift lever and the guide rail, leading to accelerated wear and other problems, necessitating improvement.

[0003] To address the aforementioned issues, a telescopic shift lever design has been proposed. This design involves adding a hole to the lever body, into which one end of a shaft is slidably inserted, while the other end slides into a guide rail. The retractable function of the shaft relative to the hole absorbs fluctuations caused by machining and assembly errors. However, considering the need for the shaft to slide into the hole, its outer diameter is typically smaller to facilitate assembly. This results in a gap between the shaft and the hole, making it impossible to guarantee the concentricity of the lever and shaft. Utility Model Content

[0004] The purpose of this invention is to solve the problem in the prior art that, in order to facilitate assembly, the outer diameter of the shaft is usually smaller than that of the hole in the rod, which leads to a gap between the shaft and the hole and makes it impossible to guarantee the concentricity between the rod and the shaft.

[0005] To solve the above problems, this utility model provides a telescopic self-aligning structure for a shaft, including a rod, a shaft, and a self-aligning assembly. One end of the rod has an axial guide hole, and the bottom of the guide hole has a coaxial limiting hole. The shaft is located inside the guide hole and includes a limiting end that slides into the limiting hole and a telescopic boss located at the opening of the guide hole. The self-aligning assembly includes a spring, a limiting ring, and a self-aligning ring sequentially sleeved on the shaft. One end of the spring abuts against the bottom of the guide hole, and the other end abuts against one side of the limiting ring. The inner peripheral wall of the limiting ring slides with the shaft, and the outer peripheral wall has a gap with the guide hole. The inner peripheral wall of the self-aligning ring has a gap with the shaft, and the outer peripheral wall slides with the guide hole. The self-aligning ring has a conical surface on the side facing the limiting ring, and the other side of the limiting ring abuts against the conical surface. The side of the self-aligning ring facing away from the limiting ring abuts against the telescopic boss.

[0006] Compared with the prior art, the above solution adds a self-aligning component inside the guide hole of the rod. During the extension and retraction of the shaft relative to the guide hole of the rod, the limiting ring is pushed towards the conical surface of the self-aligning ring under the action of the spring. Since the outer peripheral wall of the self-aligning ring slides with the guide hole and the inner peripheral wall leaves a gap with the shaft, and the self-aligning ring itself is small in size, the self-aligning ring can ensure good concentricity with the guide hole. Since the outer peripheral side of the limiting ring leaves a gap with the guide hole, the conical surface of the self-aligning ring will align the limiting ring, ensuring the concentricity of the limiting ring and the shaft relative to the guide hole, thereby improving the stability of the shaft relative to the guide hole of the rod.

[0007] In an improved embodiment, the telescopic boss and the guide hole are fitted with a clearance fit, thereby ensuring that the telescopic boss has a certain radial movement space, which facilitates the self-aligning assembly to align the shaft.

[0008] In an improved embodiment, the side wall of the limiting end is provided with several circumferentially distributed slots, one end of which penetrates to the end face of the limiting end and the other end extends to the guide hole. The slots on the limiting end of the shaft can ensure the communication between the limiting hole and the guide hole, avoid the problem of air pressure imbalance in the limiting hole, and also enable the limiting end of the shaft to have a certain deformation capability, thereby improving the stability of the limiting end sliding in the limiting hole.

[0009] In an improved embodiment, the slots are four in number and evenly spaced, thereby making the deformation capacity of the limiting end of the shaft more balanced and further improving the stability of the limiting end sliding within the limiting hole.

[0010] In an improved embodiment, the outer diameter of the limiting ring on the side facing the spring is increased to form a stepped platform, thereby facilitating the contact of the spring.

[0011] In an improved embodiment, the limiting ring has a chamfer on the side facing the conical surface, thereby increasing the contact area between the limiting ring and the conical surface and improving the self-aligning effect.

[0012] In an improved embodiment, the conical surface has two end faces located on both sides of the self-aligning ring, so that the self-aligning ring has a conical surface that the limiting ring can abut against regardless of whether it is installed on the front or back, thus improving the ease of assembly. Attached Figure Description

[0013] Figure 1 A schematic cross-sectional view of a shaft telescopic self-aligning structure;

[0014] Figure 2 for Figure 1 A magnified view of a portion of region A in the middle.

[0015] Explanation of reference numerals in the attached figures.

[0016] 1. Rod body; 11. Guide hole; 12. Limiting hole; 13. Ball joint; 2. Shaft body; 21. Slot; 22. Telescopic boss; 3. Self-aligning assembly; 31. Spring; 32. Limiting ring; 321. Stepped platform; 33. Self-aligning ring; 331. Conical surface; 4. Housing; 41. Ball socket structure; 42. Guide rail. Detailed Implementation

[0017] It should be understood by those skilled in the art that the following embodiments are merely illustrative of the technical principles of the embodiments of this application and are not intended to limit the scope of protection of the embodiments of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0018] In the following description of the embodiments, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0019] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0020] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0021] Please see Figure 1 and Figure 2 The present invention provides a telescopic self-aligning structure for a shaft, comprising a rod 1, a shaft 2, and a self-aligning assembly 3. One end of the rod 1 has an axial guide hole 11, and the bottom of the guide hole 11 has a coaxial limiting hole 12. The shaft 2 is located within the guide hole 11 and includes a limiting end that slides into the limiting hole 12 and a telescopic boss 22 located at the opening of the guide hole 11. The self-aligning assembly 3 includes a spring 31, a limiting ring 32, and a self-aligning ring 33 sequentially sleeved on the shaft 2. One end of the spring 31 abuts against the bottom of the guide hole 11 and the other end abuts against one side of the limiting ring 32. The inner peripheral wall of the limiting ring 32 slides with the shaft 2 and the outer peripheral wall leaves a gap with the guide hole 11. The inner peripheral wall of the self-aligning ring 33 leaves a gap with the shaft 2 and the outer peripheral wall slides with the guide hole 11. The self-aligning ring 33 has a conical surface 331 on the side facing the limiting ring 32. The other side of the limiting ring 32 abuts against the conical surface 331. The side of the self-aligning ring 33 facing away from the limiting ring 32 abuts against the telescopic boss 22.

[0022] The above solution is mainly applied to gear shifters. Generally speaking, the upper part of the gear shifter housing 4 is provided with a ball socket structure 41 and the lower part is provided with a guide rail 42. The lever body 1 and the shaft body 2 form the shift lever. The middle part of the lever body 1 is provided with a ball joint 13 that is movably connected to the ball socket structure 41, while the telescopic boss 22 of the shaft body 2 is slidably engaged with the guide rail 42. Thus, the lever body 1 can rotate around the ball joint 13. The shaft body 2 restricts the rotation direction of the lever body 1 due to the sliding engagement between the telescopic boss 22 and the guide rail 42. At the same time, due to the action of the guide rail 42, the telescopic boss 22 will drive the shaft body 2 to telescopically move relative to the guide hole 11.

[0023] During the extension and retraction of the shaft 2 relative to the guide hole 11 of the rod 1, by adding a self-aligning component 3 inside the guide hole 11 of the rod 1, the limiting ring 32 is pushed towards the conical surface 331 of the self-aligning ring 33 under the action of the spring 31. Since the outer peripheral wall of the self-aligning ring 33 slides with the guide hole 11 and the inner peripheral wall leaves a gap with the shaft 2, and the self-aligning ring 33 itself is small in size, the self-aligning ring 33 can ensure good concentricity relative to the guide hole 11. Since the outer peripheral side of the limiting ring 32 leaves a gap with the guide hole 11, the conical surface 331 of the self-aligning ring 33 will align the limiting ring 32, ensuring the concentricity of the limiting ring 32 and the shaft 2 relative to the guide hole 11, thereby improving the stability of the shaft 2 when moving relative to the guide hole 11 of the rod 1.

[0024] In this embodiment, the telescopic boss 22 and the orifice of the guide hole 11 are in clearance fit, thereby ensuring that the telescopic boss 22 has a certain radial movement space, which facilitates the self-aligning assembly 3 to self-align the shaft 2.

[0025] In this embodiment, the side wall of the limiting end is provided with a plurality of circumferentially distributed slots 21. One end of the slot 21 extends through to the end face of the limiting end and the other end extends to the guide hole 11. The slots 21 provided on the limiting end of the shaft 2 can ensure the communication between the limiting hole 12 and the guide hole 11, avoid the problem of air pressure imbalance in the limiting hole 12, and at the same time enable the limiting end of the shaft 2 to have a certain deformation capability, thereby improving the stability of the limiting end sliding in the limiting hole 12.

[0026] More specifically, there are four slots 21 that are evenly spaced, which makes the deformation capacity of the limiting end of the shaft 2 more balanced and further improves the stability of the limiting end sliding in the limiting hole 12.

[0027] In this embodiment, the outer diameter of the limiting ring 32 facing the spring 31 is increased to form a stepped platform 321, thereby facilitating the contact of the spring 31.

[0028] In this embodiment, the limiting ring 32 has a chamfer on the side facing the conical surface 331, thereby increasing the contact area between the limiting ring 32 and the conical surface 331 and improving the self-aligning effect.

[0029] In this embodiment, the conical surface 331 has two end faces located on both sides of the self-aligning ring 33, so that the self-aligning ring 33 has a conical surface 331 that can be abutted by the limiting ring 32 regardless of whether it is installed on the front or back, thus improving the ease of assembly.

[0030] It should be noted that in the description of this application, the terms "inner" and "outer," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application. All directional indications (such as up, down, left, right, front, back, inner, and outer) are only used to explain the relative positional relationships and movement between components in a specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0031] In the description of this application, the references to terms such as "an embodiment," "some embodiments," "in this embodiment," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0032] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A shaft telescopic self-aligning structure, characterized in that, The device includes a rod (1), a shaft (2), and a self-aligning assembly (3). One end of the rod (1) has an axial guide hole (11), and the bottom of the guide hole (11) has a coaxial limiting hole (12). The shaft (2) is located inside the guide hole (11). The shaft (2) includes a limiting end that slides into the limiting hole (12) and a telescopic boss (22) located at the opening of the guide hole (11). The self-aligning assembly (3) includes a spring (31), a limiting ring (32), and a self-aligning ring (33) sequentially sleeved on the shaft (2). One end of the spring (31) abuts against... The guide hole (11) is at the bottom and the other end abuts against one side of the limiting ring (32). The inner peripheral wall of the limiting ring (32) is slidably engaged with the shaft (2) and the outer peripheral wall is left with a gap from the guide hole (11). The inner peripheral wall of the self-aligning ring (33) is left with a gap from the shaft (2) and the outer peripheral wall is slidably engaged with the guide hole (11). The self-aligning ring (33) has a conical surface (331) on the side facing the limiting ring (32). The other side of the limiting ring (32) abuts against the conical surface (331). The side of the self-aligning ring (33) facing away from the limiting ring (32) abuts against the telescopic boss (22).

2. The shaft telescopic self-aligning structure according to claim 1, characterized in that, The telescopic boss (22) and the orifice of the guide hole (11) are in clearance fit.

3. The shaft telescopic self-aligning structure according to claim 1 or 2, characterized in that, The side wall of the limiting end is provided with a plurality of circumferentially distributed slots (21), one end of the slots (21) penetrates to the end face of the limiting end and the other end extends to the guide hole (11).

4. The shaft telescopic self-aligning structure according to claim 3, characterized in that, The slots (21) are four in number and evenly spaced.

5. The shaft telescopic self-aligning structure according to claim 1, characterized in that, The outer diameter of the limiting ring (32) facing the spring (31) increases to form a stepped platform (321).

6. The shaft telescopic self-aligning structure according to claim 1 or 5, characterized in that, The limiting ring (32) has a chamfer on the side facing the conical surface (331).

7. The shaft telescopic self-aligning structure according to claim 1, characterized in that, The conical surface (331) has two end faces located on both sides of the self-aligning ring (33).

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