An adjusting cam for a spiral transition surface steering column

Abstract

The utility model discloses an adjusting cam for a steering column with a spiral transition surface, which belongs to the technical field of vehicle parts and solves the problem of insufficient self-locking performance of the adjusting cam in the prior art. The utility model comprises a cam housing, an adjusting cam plane is arranged on the inner wall of the cam housing, a plurality of self-locking raised platforms are arranged on the adjusting cam plane, a spiral surface connected to the adjusting cam plane and a raised plane connected to the spiral surface are arranged on the self-locking raised platform, a thread structure is arranged on the spiral surface, and the spiral surface and the adjusting cam plane are arranged at an angle. The utility model is used for more labor-saving unlocking through thread when unlocking is required.

Description

Technical Field

[0001] The utility model belongs to the technical field of vehicle components, and in particular relates to an adjusting cam for a spiral transition surface steering column. Background Art

[0002] The current automobile steering wheel position adjustment is achieved through the steering column adjustment mechanism. During the use of the car, the steering column adjustment mechanism keeps the entire mechanism locked through a locking device. When the steering wheel position needs to be adjusted, the adjustment handle is mainly moved by hand, and a gap is created between the upper column and the fixed bracket through the unlocking structure to achieve unlocking. The adjustment cam in the unlocking structure can achieve a small handle movement angle, and the gap between the upper column and the fixed bracket is easy to adjust. The adjustment cam process is simple and low in cost, so it has been widely adopted. However, when the handle is moved, the force of this adjustment cam structure is not smooth, there is a stuck phenomenon, and the driver's operating experience is poor; the self-locking performance of the adjustment cam is not strong, and it is automatically unlocked when used in extreme environments, affecting driving safety. For this reason, a locking device for an adjustment cam for a spiral transition surface steering column is designed to make up for the shortcomings of the existing adjustment cam. Utility Model Content

[0003] The purpose of the utility model is to:

[0004] In order to solve the problem of insufficient self-locking performance of the adjusting cam in the prior art, an adjusting cam for a steering column with a spiral transition surface is provided.

[0005] The technical solution adopted by the utility model is as follows:

[0006] An adjusting cam for a steering column with a spiral transition surface comprises a cam housing, an adjusting cam plane is arranged on the inner wall of the cam housing, a plurality of self-locking raised platforms are arranged on the adjusting cam plane, a spiral surface connected to the adjusting cam plane and a raised plane connected to the spiral surface are arranged on the self-locking raised platform, a threaded structure is arranged on the spiral surface, and the spiral surface is inclined to the adjusting cam plane.

[0007] Furthermore, arc-shaped transition sections are provided at the connection between the adjusting cam plane and the helical surface, and at the connection between the helical surface and the raised plane.

[0008] Furthermore, a cam center hole is provided on the cam housing, and a plurality of limit blocks for limiting the rotation angle of the cam are provided on the outer circumference of the cam housing, and the setting positions of the limit blocks correspond to the raised plane.

[0009] Furthermore, a self-locking angle structure of 5 to 8 degrees is formed between the adjustment cam plane and the raised plane.

[0010] Furthermore, four or two self-locking protrusion platforms are evenly arranged around the axis of the cam.

[0011] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0012] The utility model discloses a locking device for an adjusting cam of a spiral transition surface steering column, which assists in locking and unlocking through the spiral surface, makes the force of the operating handle easier, and makes the adjustment smoother, thereby achieving a higher self-locking performance effect of the adjusting cam. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a cam structure diagram of the utility model;

[0014] Figure 2 It is a cross-sectional view of the cam along the AA direction of the present invention.

[0015] Markings in the figure: 1-cam housing, 2-adjusting cam plane, 3-self-locking raised platform, 4-spiral surface, 5-raised plane, 6-arc-shaped transition section, 7-cam center hole, 8-limiting block. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail in combination with the embodiments below. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not used to limit the utility model.

[0017] An adjusting cam for a spiral transition surface steering column comprises a cam housing 1, an adjusting cam plane 2 is arranged on the inner wall of the cam housing 1, a plurality of self-locking raised platforms 3 are arranged on the adjusting cam plane 2, a spiral surface 4 connected to the adjusting cam plane 2 and a raised plane 5 connected to the spiral surface 4 are arranged on the self-locking raised platform 3, a threaded structure is arranged on the spiral surface 4, and the spiral surface 4 is inclined to the adjusting cam plane 2.

[0018] Arc-shaped transition sections 6 are provided at the connection between the adjusting cam plane 2 and the helical surface 4 , and at the connection between the helical surface 4 and the raised plane 5 .

[0019] The cam housing 1 is provided with a cam center hole 7 , and the outer circumference of the cam housing 1 is provided with a plurality of limit blocks 8 for limiting the rotation angle of the cam, and the setting positions of the limit blocks 8 correspond to the raised plane 5 .

[0020] The cam plane 2 and the raised plane 5 are adjusted to form a self-locking angle structure of 5 to 8 degrees.

[0021] Four or two self-locking protrusion platforms 3 are evenly arranged in the circumferential direction around the axis of the cam.

[0022] The connection area between the adjusting cam plane 2 and the raised plane 5 is designed to be a spiral surface 4, and arc R is used to connect the connection between the adjusting cam plane 2 and the spiral surface 4 and the connection between the spiral surface 4 and the raised plane 5. When the rotating cam rotates on the fixed cam, the two cam spiral surfaces 4 move relative to each other, and the handle is labor-saving and rotates smoothly.

[0023] The outer spiral line segment of the cam spiral surface 4 is designed to be intercepted according to the spiral line: the cam center hole 7 line coincides with the axis of the spiral line. The cam spiral line height is the height difference Hh between the locking and unlocking of the adjustment cam (where H is the height when the two cams are unlocked, and h is the height when the two cams are locked with each other).

[0024] The utility model designs the raised plane 5 of the adjusting cam to form a self-locking angle of 5 to 8 degrees with the adjusting cam plane 2. When the raised planes 5 of the cam are fitted together, they are in a self-locking state of inclined plane fitting, ensuring that the locking structure does not loosen and automatically unlocks. When unlocking is required, the handle can be moved in the opposite direction, and it can be unlocked with less force, thereby achieving good self-locking.

[0025] The raised plane 5 of the adjusting cam of the utility model is Figure 1-Figure 2 In the figure, 4 planes are evenly distributed on the truncated table. According to different designs, 2 planes or other number of raised planes 5 are possible. Figure 1-Figure 2 The spiral surface 4 of the middle transition rotates in a counterclockwise direction, and can also be designed to rotate in a clockwise direction according to actual use.

[0026] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An adjusting cam for a spiral transition surface steering column, characterized in that: The invention comprises a cam housing (1), wherein an adjusting cam plane (2) is arranged on the inner wall of the cam housing (1), a plurality of self-locking raised platforms (3) are arranged on the adjusting cam plane (2), a helical surface (4) connected to the adjusting cam plane (2) and a raised plane (5) connected to the helical surface (4) are arranged on the self-locking raised platform (3), a thread structure is arranged on the helical surface (4), and the helical surface (4) is arranged at an inclination with respect to the adjusting cam plane (2).

2. The adjusting cam for a spiral transition surface steering column according to claim 1, characterized in that: The connection between the adjusting cam plane (2) and the helical surface (4), and the connection between the helical surface (4) and the raised plane (5) are both provided with arc-shaped transition sections (6).

3. The adjusting cam for a spiral transition surface steering column according to claim 1, characterized in that: The cam housing (1) is provided with a cam center hole (7), and the outer circumference of the cam housing (1) is provided with a plurality of limit blocks (8) for limiting the rotation angle of the cam, and the setting position of the limit blocks (8) corresponds to the raised plane (5).

4. The adjusting cam for a spiral transition surface steering column according to claim 1, characterized in that: The cam plane (2) and the raised plane (5) are adjusted to form a self-locking angle structure of 5 to 8 degrees.

5. The adjusting cam for a spiral transition surface steering column according to claim 1, characterized in that: The self-locking raised platforms (3) are evenly arranged in four or two numbers in the circumferential direction around the axis of the cam.

Images