Connecting shaft for steer-by-wire

Abstract

The utility model discloses a connecting shaft for steer-by-wire, which comprises an end part, a middle part and a tail part, an extension part is additionally arranged between the middle part and the end part, the end part is provided with three linearly distributed spline parts, each spline part comprises a raised line, and one end of the raised line far away from the spline part in the middle part is provided with an inclined surface. The steering wheel has the advantage that the steering wheel can be adjusted in a large range due to the design of the input shaft structure.

Description

Technical Field

[0001] The utility model relates to the field of connecting shafts, and specifically to a connecting shaft for steer-by-wire. Background Art

[0002] The input shaft of the existing market structure can achieve four-phase adjustment of the steering wheel. With the development of intelligent driving and driverless technologies, higher requirements are put forward for steer-by-wire technology. It is not only required that the steering wheel can be adjusted to meet the needs of drivers of different body sizes, but also that the steering wheel can be completely retracted into the instrument panel of the cockpit to facilitate vehicle autonomous driving.

[0003] To achieve such a function, a longer adjustable stroke of the steering wheel is required. This requires a new input shaft structure with higher machining accuracy, and the strength and weight must remain unchanged. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a connecting shaft for steer-by-wire to solve the problems raised in the above background art, and it has the advantage of designing the input shaft structure to enable a large range of adjustment of the steering wheel.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A connecting shaft for steer-by-wire includes an end part, a middle part and a tail part. An extension part is added between the middle part and the end part. The end part is provided with three spline parts linearly distributed. The spline part includes a convex strip, and one end of the convex strip of the spline part far from the middle part is provided with an inclined surface.

[0006] By adopting the above technical solution, on the basis of the same type of input shaft structure, the structural design is optimized. On the basis of ensuring the material strength of the product, a longer shaft, a longer spline length and an increased spline module are designed, so that the telescopic stroke of the steering wheel column is lengthened without affecting the stability of the steering wheel column stroke adjustment process, and at the same time, the requirement of 300 N·M static torsion strength is met. The size of the middle rod part of the connecting shaft is lengthened, a customized tooth forming die is used to increase the tooth length in the spline area, and the diameter of the connecting shaft is appropriately adjusted according to the strength requirements. The length of the middle part is increased by setting an extension part.

[0007] As a further scheme of the utility model: The tail part includes an elliptical first clamping block. A first clamping rod is clamped to the tail part. The first clamping rod is provided with a first clamping groove for accommodating the first clamping block. The groove wall of the first clamping groove is integrally connected with two half-ring blocks that fit the side surface of the first clamping block.

[0008] By adopting the above technical solution, the first clamping block is clamped into the half-ring blocks in the first clamping groove, so that the tail part and the first clamping rod are clamped.

[0009] Preferably, a gap is provided between adjacent spline parts.

[0010] Preferably, a second clamping rod is clamped at the end, and a tooth profile angle that fits with the spline portion is provided inside the second clamping rod.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0012] On the basis of the same type of input shaft structure, the structural design is optimized. On the basis of ensuring the material strength of the product, a longer shaft, a longer spline length, and an increased spline module are designed, so that the telescopic stroke of the steering column is lengthened without affecting the stability of the steering column stroke adjustment process, and at the same time, the requirement of 300 N.M static torsional strength is met. The size of the middle rod portion of the connecting shaft is lengthened, a customized tooth forming die is used to increase the tooth length in the spline area, and the connecting shaft is directly adjusted appropriately according to the strength requirements. Description of the Drawings

[0013] Figure 1 It is a schematic structural diagram of the embodiment;

[0014] Figure 2 It is a schematic structural diagram of the first clamping rod;

[0015] Figure 3 It is a schematic structural diagram of the first clamping rod from another perspective;

[0016] Figure 4 It is a schematic structural diagram of the second clamping rod in the embodiment;

[0017] Figure 5 It is a cross-sectional view of the second clamping rod.

[0018] In the figure: 1, end portion; 2, middle portion; 3, tail portion; 4, extension portion; 5, spline portion; 6, convex strip; 7, inclined surface; 8, first clamping block; 9, first clamping rod; 10, first clamping groove; 11, half-ring block; 12, gap; 13, second clamping rod; 14, tooth profile angle. Detailed Embodiment

[0019] The technical solutions in the embodiments of the present utility model will be clearly and completely described below. Apparently, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0020] In the embodiment of the present utility model,

[0021] A connecting shaft for steer-by-wire, as Figures 1 - 5As shown, it includes an end portion 1, a middle portion 2 and a tail portion 3. An extension portion 4 is added between the middle portion 2 and the end portion 1. The end portion 1 is provided with three spline portions 5 distributed linearly. The spline portion 5 includes a rib 6. One end of the rib 6 of the spline portion 5 far from the middle portion 2 is provided with an inclined surface 7.

[0022] The tail portion 3 includes an elliptical first clamping block 8. A first clamping rod 9 is clamped to the tail portion 3. The first clamping rod 9 is provided with a first clamping groove 10 for accommodating the first clamping block 8. Two semi-circular blocks 11 that fit the side surface of the first clamping block 8 are integrally connected to the groove wall of the first clamping groove 10.

[0023] A gap 12 is provided between adjacent spline portions 5.

[0024] A second clamping rod 13 is clamped to the end portion 1. A tooth-shaped angle 14 that fits the spline portion 5 is provided inside the second clamping rod 13.

[0025] Working principle:

[0026] Based on the structure of the same type of input shaft, the structural design is optimized. On the basis of ensuring the material strength of the product, a longer shaft, a longer spline length and an increased spline module are designed, so that the telescopic stroke of the steering column is lengthened without affecting the stability of the steering column stroke adjustment process, and at the same time, the requirement of 300 N.M static torsion strength is met. The size of the middle rod portion of the connecting shaft is lengthened, and a customized tooth forming die is used to increase the tooth length in the spline area. The connecting shaft is appropriately adjusted directly according to the strength requirements.

[0027] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. A connecting shaft for steer-by-wire, comprising an end portion (1), a middle portion (2) and a tail portion (3), characterized in that: An extension part (4) is provided between the middle part (2) and the end part (1). The end part (1) is provided with three spline parts (5) linearly distributed. The spline part (5) includes a rib (6). One end of the rib (6) of the spline part (5) far from the middle part (2) is provided with an inclined surface (7).

2. The connecting shaft for steer-by-wire according to claim 1, wherein: The tail part (3) includes an elliptical first clamping block (8). A first clamping rod (9) is clamped on the tail part (3). The first clamping rod (9) is provided with a first clamping groove (10) for accommodating the first clamping block (8). Two semi-ring blocks (11) that fit the side surface of the first clamping block (8) are integrally connected to the groove wall of the first clamping groove (10).

3. A connecting shaft for steer-by-wire according to claim 1, characterized in that: A gap (12) is provided between adjacent spline parts (5).

4. A connecting shaft for steer-by-wire according to claim 1, characterized in that: A second clamping rod (13) is clamped on the end part (1). A tooth-shaped angle (14) that fits the spline part (5) is provided in the second clamping rod (13).

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