A segmented connecting shaft for a steering column

Abstract

This utility model discloses a segmented connecting shaft for a steering column, relating to the field of automotive steering technology. It aims to solve the problem of difficult machining of extended, one-piece connecting shafts in the prior art. The technical solution includes a connecting shaft comprising a short shaft and an extended shaft. The extended shaft has a first spline inside, and the short shaft has a second spline with a tolerance ring. The short shaft is slidably connected to the extended shaft via the second and first splines, and the tolerance ring is interference-fitted with the first spline. This utility model reduces machining difficulty by designing the connecting shaft as a two-segment splice of a short and extended shaft. Rotational force is transmitted through the sliding connection of the first and second splines, and the interference fit between the tolerance ring and the extended shaft ensures that the short and extended shafts do not axially detach, thus maintaining their original functions.

Description

Technical Field

[0001] This utility model relates to the field of automotive steering technology, specifically a segmented connecting shaft for a steering column. Background Technology

[0002] The connecting shaft is located inside the steering column and is mainly used for the transmission connection and collapsible guidance between the steering wheel and the electric power steering system. Since the addition of electric adjustment to the steering column will increase the length of the steering column, the connecting shaft must also increase accordingly.

[0003] Existing connecting shafts are all one-piece designs. The extended one-piece connecting shafts are not only difficult to process, but also too heavy, making them inconvenient to manufacture and assemble in the vehicle. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the existing defects and provide a segmented connecting shaft for steering column, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, this utility model discloses a segmented connecting shaft for a steering column. The technical solution adopted is to include a connecting shaft, which includes a short shaft and an extended shaft. The extended shaft has a first spline inside, and the short shaft has a second spline with a tolerance ring. The short shaft is slidably connected to the extended shaft through the second spline and the first spline, and the tolerance ring is interference-fitted with the first spline.

[0006] As a preferred technical solution of this utility model, the extended shaft has a hollow structure, and the first spline is located inside the right side of the extended shaft.

[0007] As a preferred technical solution of this utility model, an annular groove is formed in the middle of the second spline, and a tolerance ring is inserted into the annular groove.

[0008] As a preferred technical solution of this utility model, the tolerance ring surface has an annular array of teeth, and the teeth are interference-fitted with the first spline.

[0009] As a preferred technical solution of this utility model, the locking teeth mesh with the first spline spline teeth.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model reduces the processing difficulty by designing the connecting shaft as a two-section splice of a short shaft and an extended shaft, and realizes the transmission of rotational force through the sliding connection of the first spline and the second spline. The interference fit between the tolerance ring and the extended shaft ensures that the short shaft and the extended shaft do not fall off axially, thus ensuring the original function. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of the present utility model. Figure 1;

[0012] Figure 2 This is a schematic diagram of the structure of the present utility model. Figure 2 ;

[0013] Figure 3 This is a schematic diagram of the structure of the present utility model. Figure 3 ;

[0014] Figure 4 This is an exploded view of the structure of this utility model;

[0015] Figure 5 This is an enlarged view of the tolerance ring of this utility model;

[0016] Figure 6 This is a sectional view of the tolerance ring of this utility model.

[0017] In the diagram: 1. Connecting shaft; 2. Power motor; 3. Short shaft; 301. Second spline; 302. Annular groove; 4. Extended shaft; 401. First spline; 5. Tolerance ring; 501. Clamping tooth. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1

[0019] like Figures 1 to 6 As shown, this utility model discloses a segmented connecting shaft for a steering column. The technical solution includes a connecting shaft 1, which comprises a short shaft 3 and an extended shaft 4. The extended shaft 4 has a hollow structure, with a first spline 401 on the right side inside. The short shaft 3 has a second spline 301, and the second spline 301 has a tolerance ring 5. An annular groove 302 is formed in the middle of the second spline 301, and the tolerance ring 5 is locked inside the annular groove 302. The short shaft 3 is slidably connected to the extended shaft 4 through the second spline 301 and the first spline 401 to ensure radial fixation. The surface of the tolerance ring 5 has an annular array of teeth 501, which are interference-fitted with the first spline 401 to ensure that the short shaft 3 and the extended shaft 4 do not axially fall off, thus ensuring the original function.

[0020] The working principle of this utility model is as follows: During the working process, the assist motor 2 drives the short shaft 3 to rotate. The short shaft 3 is radially fixed by the first spline 401 and the second spline 301, which drives the extended shaft 4 to rotate, thereby assisting the connecting shaft 1. During this process, the retaining tooth 501 is interference-fitted with the first spline 401 to ensure that the short shaft 3 and the extended shaft 4 do not axially fall off.

[0021] The circuits and mechanical connections involved in this utility model are common practices used by those skilled in the art, and technical inspiration can be obtained through a limited number of experiments. They are common knowledge.

[0022] Components not described in detail in this article are existing technologies.

[0023] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A segmented coupling shaft for a steering column, characterized by: The system includes a connecting shaft (1), which includes a short shaft (3) and an extended shaft (4). The extended shaft (4) has a first spline (401) inside, and the short shaft (3) has a second spline (301). The second spline (301) has a tolerance ring (5). The short shaft (3) is slidably connected to the extended shaft (4) through the second spline (301) and the first spline (401). The tolerance ring (5) is interference-fitted with the first spline (401).

2. A segmented coupling shaft for a steering column according to claim 1, characterized in that: The extended shaft (4) is a hollow structure, and the first spline (401) is located inside the right side of the extended shaft (4).

3. A segmented coupling shaft for a steering column according to claim 1, characterized in that: A ring groove (302) is formed in the middle of the second spline (301), and a tolerance ring (5) is inserted inside the ring groove (302).

4. A segmented coupling shaft for a steering column according to claim 3, characterized in that: The tolerance ring (5) has an annular array of teeth (501) on its surface, and the teeth (501) are interference-fitted with the first spline (401).

5. A segmented coupling shaft for a steering column according to claim 4, characterised in that: The locking tooth (501) meshes with the first spline tooth (401).

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