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Steering device

A steering device and steering shaft technology, which is applied to the steering column, steering control mounted on the vehicle, elastic coupling, etc., can solve the problems of increased installation size, excessive application, inappropriateness, etc. The effect of shortening the installation size

Inactive Publication Date: 2006-05-03
NSK LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to compensate for the positional deviation between the motor shaft and the worm shaft, the steering device in Patent Document 2 uses a power transmission joint to connect the motor shaft and the worm shaft, which increases the axial installation size and is not suitable for arranging in a narrow car.
Furthermore, when there is a positional misalignment or insufficient adjustment between the connected shafts at the connecting portion of any shaft constituting the steering device, an excessive force will be applied to the bearing or the shaft, and the operation will become heavy, or a malfunction may occur. Abnormal conditions such as noise or vibration

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0070] Figure 3 to Figure 4 Represents the connecting portion of the steering shaft of the first embodiment of the present invention, representing the figure 2 An example of the connecting portion of the inner shaft (upper side steering shaft) 12B and the input shaft (lower side steering shaft) 22 of the auxiliary device 20 . image 3 (1) is a longitudinal sectional view of the connecting portion of the inner shaft 12B and the input shaft 22, image 3 (2) is image 3 (1) A-A sectional view. Figure 4 (1) by image 3 A cross-sectional view of the input shaft 22 cut by the A-A line of (1), Figure 4 (2) by image 3 The sectional view of the spring cut by the A-A line of (1), Figure 4 (3) by image 3 (1) Cross-sectional view of the inner shaft 12B taken along line A-A.

[0071] Such as Figure 3 to Figure 4 As shown, the vehicle body front side end portion of the inner shaft 12B ( image 3 left side of the vehicle body) and the rear side end of the input shaft 22 of t...

no. 2 example

[0084] Next, a second embodiment of the present invention will be described. Figure 5 to Figure 6 Represents the connecting portion of the steering shaft of the second embodiment of the present invention, Figure 5 (1) is a longitudinal sectional view of the connecting portion of the inner shaft 12B and the input shaft 22, Figure 5 (2) is Figure 5 (1) B-B sectional view, Figure 6 (1) by Figure 5 (1) The cross-sectional view of the input shaft 22 cut by the line B-B, Figure 6 (2) by Figure 5 (1) The sectional view of the spring and the cylindrical pin cut by the B-B line, Figure 6 (3) by Figure 5 (1) Cross-sectional view of the inner shaft 12B taken along line B-B. In the following description, only structural parts and functions different from those of the above-mentioned embodiments will be described, and repeated descriptions will be omitted.

[0085] The second embodiment is an embodiment in which the semicircular protrusion 41 of the inner shaft 12B is eli...

no. 3 example

[0095] A third embodiment of the present invention will be described below. Figure 7 to Figure 8 Represents the connecting portion of the steering shaft of the third embodiment of the present invention, Figure 7 (1) is a longitudinal sectional view of the connecting portion of the inner shaft 12B and the input shaft 22, Figure 7 (2) is Figure 7 (1) C-C sectional view. Figure 8 (1) by Figure 7 A cross-sectional view of the input shaft 22 cut along line C-C of (1), Figure 8 (2) by Figure 7 (1) The sectional view of the spring and the ball cut by the C-C line, Figure 8 (3) by Figure 7 (1) Cross-sectional view of the inner shaft 12B taken along line C-C. In the following description, only structural parts and functions different from those of the above-mentioned embodiments are described, and repeated descriptions are omitted.

[0096] The third embodiment is an embodiment in which a ball is used instead of the cylindrical pin 61 of the second embodiment to trans...

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Abstract

The present invention relates to a steering device, which is easy to connect the steering shaft on the upper side and the steering shaft on the lower side without loosening after the connection, and reduces the manufacturing cost of parts. When the inner shaft (12B) is fully inserted into the input shaft (22), the wire ring (70) cooperates with the annular groove (44) and the annular groove (54) to limit the axial direction between the inner shaft and the input shaft. relative movement. Since there is a small gap in the direction of rotation and radius between the protrusion (41) of the inner shaft (12B) and the groove (52) of the input shaft (22), the assembly of the inner shaft and the input shaft can be easily performed . In addition, since the hollow cylindrical spring (60) is inserted into the cylindrical space formed by the groove (42) of the inner shaft (12B) and the groove (52) of the input shaft (22) in a compressed state, Therefore, there will be no looseness in the direction of rotation and the direction of radius between the inner shaft and the input shaft.

Description

technical field [0001] The present invention relates to a steering device, and more particularly to a steering device having a connection portion between an upper steering shaft and a lower steering shaft that transmits the rotation of the upper steering shaft to a steering gear. side. Background technique [0002] In a steering system equipped with a steering assist unit that applies a steering assist force proportional to the steering torque of the steering wheel, it is necessary to connect the input shaft of the steering assist unit assembled as a component to the steering shaft on the upper side so that the rotational torque can be transmitted. , and cannot move relative to each other in the axial direction. [0003] As a steering device having a connection structure connected to such a steering assisting unit, there is a steering device described in Patent Document 1 - Japanese Patent Application Laid-Open No. 2000-313340. As shown in Fig. 1 of the present application...

Claims

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Application Information

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IPC IPC(8): F16D3/10B62D1/16
Inventor 濑川彻惠田广力石一穗
Owner NSK LTD