Steering shaft composition mechanism capable of controlling telescopic length

Abstract

The utility model discloses a steering shaft composition mechanism for controlling the telescopic length and belongs to the technical field of automobile steering column steering shafts. The steering device comprises an upper steering shaft and a lower steering shaft, the upper steering shaft is composed of a steering shaft sleeve and an upper steering shaft which are mutually fixed, the steering shaft sleeve is of a sixteen-tooth internal spline structure, an upper spline is arranged on the upper portion of the upper steering shaft, the upper spline is of a parallel tooth structure, and the upper spline and the sixteen-tooth internal spline are unique in direction. A sixteen-tooth nylon external spline structure is formed at one end of the steering lower shaft in an injection molding mode, the sixteen-tooth nylon external spline is matched with the sixteen-tooth internal spline, the other end of the steering lower shaft is a special-shaped structure shaft, and the special-shaped structure shaft and the sixteen-tooth internal spline have uniqueness in the direction. And the steering upper shaft and the steering lower shaft are riveted in the riveting groove. According to the utility model, the steering shaft assembly can be assembled in a correct direction, and the wrong assembly risk is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of automotive steering column and steering shaft technology, specifically relating to a steering shaft assembly mechanism for controlling the extension and retraction length. Background Technology

[0002] Existing automotive mechanical steering columns consist of a sliding pair between an upper steering shaft and a lower steering shaft. After the upper and lower steering shafts are assembled, their sliding force and torsional clearance are tested. Once the tests are passed, the sliding pair is lubricated before proceeding to the next step. The mating of the upper and lower steering shafts must not only ensure the correctness of the sliding force and rotation direction but also meet the requirements for the telescopic length range. If the assembled steering shaft components are not inserted at the correct angle during turnover or after being separated at the assembly site, or if components from different shafts are mixed, it may lead to incorrect installation angles of the steering column external connectors, or excessive torsional clearance and sliding force, resulting in defective products leaving the factory or assembly line shutdowns at the OEM. Utility Model Content

[0003] This invention addresses the aforementioned problems and overcomes the shortcomings of existing technologies by providing a steering shaft assembly mechanism for controlling the telescopic length. This invention ensures that the steering shaft assembly is installed in the correct direction, reducing the risk of incorrect installation.

[0004] To achieve the above objectives, the present invention adopts the following technical solution.

[0005] This utility model provides a steering shaft assembly for controlling the telescopic length, including an upper steering shaft and a lower steering shaft. The upper steering shaft is composed of a steering bushing and an upper steering shaft that are fixed to each other. The steering bushing has a sixteen-tooth internal spline structure. The upper steering shaft has an upper spline on its upper part, which is a parallel-tooth structure. The direction of the upper spline is unique to that of the sixteen-tooth internal spline. One end of the lower steering shaft is injection-molded into a sixteen-tooth nylon external spline structure, which mates with the sixteen-tooth internal spline. The other end of the lower steering shaft is a non-circular shaft structure, which is unique to that of the sixteen-tooth internal spline. The steering bushing has a riveting groove at its port for riveting the upper and lower steering shafts together.

[0006] Furthermore, there are four riveting grooves, which are evenly distributed circumferentially at the port of the steering bushing.

[0007] The beneficial effects of this utility model.

[0008] This invention sets the steering shaft assembly as a sixteen-tooth spline fit structure, and riveting is performed on the end face of the steering shaft sleeve of the upper steering shaft. This locks the sliding pair, which is well matched with the sliding force and torsional clearance, so that the steering shaft assembly can be assembled in the correct direction, reducing the risk of incorrect assembly. Attached Figure Description

[0009] To make the technical problems solved, the technical solutions, and the beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0010] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0011] Figure 2 This is a schematic diagram of the upper steering shaft of this utility model.

[0012] Figure 3 This is a schematic diagram of the structure of the lower steering shaft of this utility model.

[0013] Figure 4 This is a schematic diagram of the rivet point of this utility model.

[0014] The markings in the diagram are as follows: 1 is the steering shaft sleeve, 2 is the upper steering shaft, 3 is the sixteen-tooth internal spline, 4 is the upper spline, 5 is the sixteen-tooth nylon external spline, 6 is the irregular structure shaft, 7 is the riveting groove, and 8 is the lower steering shaft. Detailed Implementation

[0015] As shown in the accompanying drawings, this embodiment provides a steering shaft assembly for controlling the telescopic length, including an upper steering shaft and a lower steering shaft 8. The upper steering shaft is composed of a steering shaft sleeve 1 and an upper steering shaft 2 that are fixed to each other.

[0016] The steering bushing 1 has a sixteen-tooth internal spline 3 structure. The upper steering shaft 2 has an upper spline 4, which is a parallel-tooth structure, ensuring a unique direction for installation with the steering wheel. The upper spline 4 and the sixteen-tooth internal spline 3 have a unique direction. One end of the lower steering shaft 8 is injection-molded into a sixteen-tooth nylon external spline 5 structure, which mates with the sixteen-tooth internal spline 3. The other end of the lower steering shaft 8 is a non-circular structure shaft 6, which is installed with the intermediate steering shaft. The non-circular structure shaft and the sixteen-tooth internal spline 3 have a unique direction. The external spline surface of the shaft and the internal spline surface of the bushing form a sliding pair, allowing for torque transmission and telescopic sliding. The mating of the sixteen-tooth nylon external spline 5 and the sixteen-tooth internal spline 3 ensures not only the correct sliding force and rotation direction but also meets the requirements for the telescopic length range.

[0017] The steering shaft sleeve 1 has four riveting grooves 7 at its port, evenly distributed around the port. This four-point riveting ensures balanced riveting pressure. After the upper and lower steering shafts 8 are installed and fitted at the correct angle, the sliding force and torsional clearance are checked. If they pass inspection, the upper and lower steering shafts 8 are riveted at the riveting grooves 7. The riveting fixture positions the upper spline 4 of the upper steering shaft and the irregularly shaped shaft 6 of the lower steering shaft 8, ensuring the correct installation direction of the steering shaft assembly. After riveting, the steering shaft assembly cannot be disassembled, preventing defective products caused by misassembly or detachment during handling and assembly.

[0018] It is understood that the above specific description of this utility model is only used to illustrate this utility model and is not limited to the technical solutions described in the embodiments of this utility model. Those skilled in the art should understand that modifications or equivalent substitutions can still be made to this utility model to achieve the same technical effect; as long as the use needs are met, they are all within the protection scope of this utility model.

Claims

1. A steering shaft assembly for controlling telescopic length, comprising an upper steering shaft and a lower steering shaft (8), wherein the upper steering shaft is composed of a steering bushing (1) and an upper steering shaft (2) fixed to each other, characterized in that, The steering bushing (1) has a sixteen-tooth internal spline (3) structure. The upper steering shaft (2) is provided with an upper spline (4). The upper spline (4) has a parallel tooth structure. The upper spline (4) and the sixteen-tooth internal spline (3) have a unique direction. One end of the steering lower shaft (8) is injection molded into a sixteen-tooth nylon external spline (5) structure. The sixteen-tooth nylon external spline (5) is matched with the sixteen-tooth internal spline (3). The other end of the steering lower shaft (8) is a non-circular structure shaft (6). The non-circular structure shaft and the sixteen-tooth internal spline (3) have a unique direction. The port of the steering bushing (1) is provided with a riveting groove (7). The upper steering shaft and the lower steering shaft (8) are riveted in the riveting groove (7).

2. The steering shaft assembly mechanism for controlling telescopic length according to claim 1, characterized in that, There are four riveting grooves (7), which are evenly distributed around the port of the steering bushing (1).

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