A structure for improving the release force of a steering column handle of an automobile

Abstract

The present invention relates to the technical field of automobile steering column structure, and specifically to a structure for improving the release force of an automobile steering column handle, wherein a cam clamping structure and a handle support foot are fixed to one end of the handle that matches a climbing cam, a sliding pair one is fixed to the front surface of a cam base plate, a sliding pair two is fixed to the lower side edge of the cam base plate, and the clamping foot is fixed to the side edge of the lower left corner of the cam base plate, the sliding pair one is composed of a frustum and three climbing bosses, the climbing boss is fixed to the surface of the frustum, a through hole is provided at the center of the frustum, and a mounting hole and a climbing notch are provided on the cam clamping structure; the sliding pair two is a U-shaped block with a concave structure at the bottom, and the handle support foot contacts the curved portion of the bottom of the U-shaped block, the present invention newly designs the sliding pair two, and ensures that the handle locking force remains basically unchanged while greatly increasing the handle release force, thereby meeting the requirements of the handle locking force and the system NVH performance, and meeting the needs of some high-demand customers.

Description

Technical Field

[0001] The invention relates to the technical field of automobile steering column structures, in particular to a structure for improving the release force of an automobile steering column handle. Background Art

[0002] In order to meet the driving experience of drivers of different body shapes and heights, the steering column of the car is usually designed with a two-way or four-way adjustment mechanism to adjust the direction of the steering wheel. The driver can move and fix the mechanical adjustment mechanism by switching the handle. The size of the handle adjustment force affects the driver's feel and driving safety. In order to ensure that the handle is easy to adjust, the handle locking force should not be set too large. At the same time, in order to ensure that the handle will not be opened due to vibration or slight collision during normal use of the car, causing the steering wheel position to change suddenly, the handle release force should not be set too small.

[0003] The existing design only relies on the three bosses of the handle climbing cam to provide the handle adjustment force, such as Figure 1 As shown in the figure, during the locking process, the movement path of the handle on the cam is a→b→c, and the maximum locking force occurs in the ab segment. During the handle release process, the movement path of the handle on the cam is c→b→a, and the maximum release force occurs in the bc segment. Since the slope of the ab segment is greater than the slope of the bc segment, the difference between the locking force and the release force of the handle is generally large. When the locking force of the handle meets the requirements, the release force will be smaller; if the handle release force requirements are met, the locking force of the handle will be greater than the required value, resulting in the problem that it is difficult to meet both the feel and safety at the same time, and it cannot meet the needs of some high-demand customers.

[0004] Therefore, it is necessary to design a structure for releasing the handle of the automobile steering column which can simultaneously meet the locking force of the handle and have no significant impact on the NVH performance of the system. Summary of the invention

[0005] The present invention overcomes the difficulties of the prior art and designs a structure for the release force of a vehicle steering column handle which can simultaneously meet the handle locking force and has no significant effect on the NVH performance of the system.

[0006] In order to achieve the above-mentioned purpose, the present invention designs a structure for improving the release force of the handle of the automobile steering column, comprising a climbing cam, a cam clamping structure, and a handle support foot, characterized in that: the end of the handle that matches the climbing cam is fixed with a cam clamping structure and a handle support foot, the handle support foot is fixed to the lower edge of the end of the handle that matches the climbing cam, the climbing cam comprises a cam base plate, a sliding pair 1, a sliding pair 2, and a clamping foot, the sliding pair 1 is fixed to the front surface of the cam base plate, the sliding pair 2 is fixed to the lower side edge of the cam base plate, the clamping foot is fixed to the side edge of the lower left corner of the cam base plate, and the cam base plate, the sliding pair 1, the sliding pair 2, and the clamping foot are all It is an integral molding, and the sliding pair one is composed of a frustum and three climbing bosses. The climbing boss is fixed on the surface of the frustum and is rotationally symmetrical with the center of the frustum. A through hole is opened at the center of the frustum, and a mounting hole and a climbing notch that match the climbing boss and the through hole are opened on the cam clamping structure; the sliding pair two is a U-shaped block with a concave structure at the bottom, and the top of the U-shaped block is fixed to the cam bottom plate. When the climbing cam is fixed to the handle by using the cam clamping structure, the handle support foot contacts the curved part of the bottom of the U-shaped block, and the contact area is recessed inward to form a concave structure, so that the end of the handle support foot that contacts the sliding pair two can slide in the concave structure.

[0007] One end of the handle support foot that contacts the second sliding pair is an upward vertical hook structure.

[0008] The climbing boss is composed of a low platform and a high platform, one end of the low platform is fixed to one side of the high platform, and the other end of the low platform is an inclined landslide.

[0009] Compared with the prior art, the present invention newly designs a sliding pair 2, which ensures that the handle locking force remains basically unchanged while greatly increasing the handle releasing force, while meeting the requirements of the handle locking force and the system NVH performance, so that the issues of hand feel and safety are met at the same time, meeting the needs of some high-demand customers. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a curve diagram of the force during the locking process of the handle in the steering column.

[0011] Figure 2 It is a schematic diagram of the structure of the invention.

[0012] Figure 3 It is a schematic diagram of adjusting the sliding pair 2 in a specific implementation of the present invention.

[0013] Figure 4 It is a structural schematic diagram of the climbing cam in the present invention. DETAILED DESCRIPTION

[0014] In the specific implementation, the present invention is further described.

[0015] See also Figures 1 to 4 ,from Figure 1 It can be seen that if the handle locking force is to be kept unchanged while the handle releasing force is to be increased, the slope of the inclined plane bc needs to be increased. Since the clamping force of the clamping mechanism is very sensitive to the slope of the inclined plane bc, a larger slope will result in insufficient clamping force of the clamping mechanism when the handle is locked, thereby worsening the NVH performance of the system.

[0016] The present invention designs a structure for improving the release force of a steering column handle of an automobile, comprising a climbing cam, a cam clamping structure, and a handle support foot. A cam clamping structure 2 and a handle support foot 3 are fixed to one end of the handle that matches the climbing cam 1. The handle support foot 3 is fixed to the lower edge of one end of the handle that matches the climbing cam 1. The climbing cam 1 comprises a cam base plate 1-1, a sliding pair 1, a sliding pair 2 1-2, and a clamping foot 1-3. The sliding pair 1 is fixed to the front surface of the cam base plate 1-1, the sliding pair 2 1-2 is fixed to the lower side of the cam base plate 1-1, and the clamping foot 1-3 is fixed to the side of the lower left corner of the cam base plate 1-1. The cam base plate 1-1, the sliding pair 1, the sliding pair 2 1-2, and the clamping foot 1-3 are all integrally formed. The sliding pair 1 is composed of a round table 1-4 and a three-piece structure. The climbing boss 1-5 is fixed on the surface of the truncated table 1-4 and is rotationally symmetrical with the center of the truncated table 1-4. A through hole 1-6 is provided at the center of the truncated table 1-4. A mounting hole 2-1 and a climbing notch 2-2 matching the climbing boss 1-5 and the through hole 1-6 are provided on the cam engaging structure 2. The sliding pair 1-2 is a U-shaped block with a concave structure 1-2-1 at the bottom. The top of the U-shaped block is fixed to the cam bottom plate 1-1. When the climbing cam 1 is fixed to the handle by using the cam engaging structure 2, the handle leg 3 contacts the curved part at the bottom of the U-shaped block, and the contact area is recessed inward to form the concave structure 1-2-1, so that the end of the handle leg 3 contacting the sliding pair 1-2 can slide in the concave structure 1-2-1.

[0017] In the present invention, the end of the handle support leg 3 that contacts the sliding pair 1 - 2 is an upward vertical hook structure, so that it will not fall off during the sliding process.

[0018] The climbing boss 1-5 in the present invention is composed of a low platform 1-5-1 and a high platform 1-5-2. One end of the low platform 1-5-1 is fixed to one side of the high platform 1-5-2, and the other end of the low platform 1-5-1 is an inclined slide, which is convenient for locking during use, and the presence of the inclined slide avoids the impact on NVH performance.

[0019] See also Figure 3During the handle release process, the movement trajectory of the plastic support on the handle on the cam is C→B→A. Since the slope of the BC area is large, a large counterclockwise resistance will be applied to the plastic support, thereby significantly increasing the handle release force. During the handle locking process, the movement trajectory of the plastic support on the handle on the cam is A→B→C. Since the slope of the AB area is small, only a small resistance will be applied to the plastic support. Therefore, the handle locking force only increases slightly. In order to meet the upper limit requirement of the handle locking force, it is only necessary to slightly reduce the clamping force of the clamping mechanism, which has no obvious effect on the system NVH performance.

Claims

1. A structure for improving the release force of a steering column handle of an automobile, comprising a climbing cam, a cam engaging structure, and a handle support foot, characterized in that: A cam engaging structure (2) and a handle support foot (3) are fixed to one end of the handle that matches the climbing cam (1); the handle support foot (3) is fixed to the lower edge of the end of the handle that matches the climbing cam (1); the climbing cam (1) comprises a cam base plate (1-1), a sliding pair 1, a sliding pair 2 (1-2), and a clamping foot (1-3); the sliding pair 1 is fixed to the front surface of the cam base plate (1-1); the sliding pair 2 (1-2) is fixed to the lower side of the cam base plate (1-1); the clamping foot (1-3) is fixed to the side of the lower left corner of the cam base plate (1-1); the cam base plate (1-1), the sliding pair 1, the sliding pair 2 (1-2), and the clamping foot (1-3) are all integrally formed; the sliding pair 1 is composed of a round table (1-4) and three climbing bosses (1-5); the climbing bosses (1-5) are fixed to The surface of the truncated table (1-4) is rotationally symmetrical with the center of the truncated table (1-4), and a through hole (1-6) is provided at the center of the truncated table (1-4). The cam engaging structure (2) is provided with a mounting hole (2-1) and a climbing notch (2-2) that match the climbing boss (1-5) and the through hole (1-6). The sliding pair (2) is a U-shaped block with a concave structure (1-2-1) at the bottom, and the top of the U-shaped block is fixed to the cam bottom plate (1-1). When the climbing cam (1) is fixed to the handle by the cam engaging structure (2), the handle support foot (3) contacts the curved portion of the bottom of the U-shaped block, and the contact area is recessed inward to form the concave structure (1-2-1), so that the end of the handle support foot (3) that contacts the sliding pair (1-2) can slide in the concave structure (1-2-1).

2. The structure for improving the release force of a steering column handle of an automobile according to claim 1, characterized in that: The end of the handle support foot (3) that contacts the second sliding pair (1-2) is an upward vertical hook-shaped structure.

3. The structure for improving the release force of a steering column handle of an automobile according to claim 1, characterized in that: The climbing boss (1-5) is composed of a low platform (1-5-1) and a high platform (1-5-2), one end of the low platform (1-5-1) is fixed to one side of the high platform (1-5-2), and the other end of the low platform (1-5-1) is an inclined landslide.

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