Axial limiting and collapsing energy-absorbing mechanism for mechanical tubular column

Abstract

The utility model relates to the technical field of steering columns, in particular to an axial limiting crumple energy absorption mechanism of a mechanical column, which comprises a lower column tube, an upper column tube, an axial limiting block and a rivet, the lower column tube is sleeved outside the upper column tube, the axial limiting block and the upper column tube are fixed by the rivet, the axial limiting block is positioned in a mounting groove on the surface of the lower column tube, and the upper column tube is sleeved outside the lower column tube. The axial limiting block is slidably connected with the mounting groove and comprises a limiting block body, a protruding structure and a buffering structure. Compared with the prior art, through the combination of the axial limiting block and the rivet, the crumple performance is met, peak force required by customers is provided, it can be guaranteed that effective limiting is provided for axial adjustment, meanwhile, the rivet is prevented from being broken and losing efficacy in the axial adjustment process through the buffering structure and the protruding structure of the axial limiting block, and the service life of the rivet is prolonged. And the reliability of the tubular column performance is ensured. The device has the advantages of being simple in structure, small in occupied space and low in cost.

Description

Technical Field

[0001] The utility model relates to the technical field of steering columns, in particular to an axial limiting collapse energy absorption mechanism for a mechanical column. Background Art

[0002] The column assembly is generally equipped with a crush energy absorption mechanism and an axial limit mechanism. The crush energy absorption mechanism provides peak force to protect the safety of passengers. In order to provide effective protection for passengers, it is necessary to design a reasonable crush energy absorption structure so that the peak force value is controlled within a certain range. The axial limit mechanism controls the axial extension and extension distance of the column. Usually, when the passenger adjusts the steering wheel, the axial limit mechanism effectively guides the passenger and reasonably controls the adjustment distance.

[0003] The traditional crush energy absorption mechanism and axial limit mechanism are distributed in different positions, and have the disadvantages of complex structure, space occupation and high cost, which cannot meet the development needs of lightweight and low-cost automobile steering systems.

[0004] Therefore, it is necessary to design a mechanical pipe column axial limit collapse energy absorption mechanism, which can not only meet the collapse peak force requirements and ensure the collapse performance, but also play the role of axial limit, thereby simplifying the structure, saving space and reducing costs. Summary of the invention

[0005] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a mechanical pipe column axial limit collapse energy absorption mechanism, which can not only meet the collapse peak force requirements, but also play the role of axial limit, thereby simplifying the structure, saving space and reducing costs.

[0006] In order to achieve the above-mentioned purpose, the utility model is a mechanical pipe column axial limit collapse energy absorption mechanism, including a lower column tube, an upper column tube, an axial limit block, and rivets. The lower column tube is sleeved outside the upper column tube, and the axial limit block and the upper column tube are fixed with rivets. The axial limit block is located in an installation groove on the surface of the lower column tube, and the axial limit block is slidably connected to the installation groove.

[0007] The axial limit block includes a limit block body, a protrusion structure, and a buffer structure. A protrusion structure is provided at the bottom of the limit block body, and the protrusion structure is embedded in the mounting hole on the surface of the upper column tube. Buffer structures are provided at both ends of the limit block body, and the buffer structure contacts or separates from the inner wall of the mounting groove.

[0008] The protruding structure is interference-fitted with the mounting hole of the upper column tube.

[0009] The mounting groove is arranged along the axial direction of the lower column tube.

[0010] The buffer structure comprises two buffer arms, the connecting parts of the buffer arms are connected to the limit block body, and gaps are arranged between the buffer parts of the buffer arms and the limit block body and between the buffer parts of the two buffer arms.

[0011] The limit block body, the protruding structure and the buffer structure are an integrated structure.

[0012] There are two protruding structures, which are respectively located on both sides of the rivet.

[0013] Compared with the prior art, the present invention not only meets the collapse performance and provides the peak force required by customers, but also ensures effective limit of axial adjustment through the combination of axial limit block and rivet. At the same time, the buffer structure and protrusion structure of the axial limit block prevent the rivet from breaking and failing during the axial adjustment process, thus ensuring the reliability of the performance of the pipe column. The present invention has the advantages of simple structure, small space occupation and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model.

[0015] Figure 2 It is a cross-sectional view of the utility model.

[0016] Figure 3 for Figure 2 Enlarged view of point A.

[0017] Figure 4 It is a structural schematic diagram of the axial limit block of the utility model. DETAILED DESCRIPTION

[0018] The utility model is now further described with reference to the accompanying drawings.

[0019] See also Figure 1 , Figure 2 and Figure 3 The utility model is a mechanical pipe column axial limit collapse energy absorption mechanism, including a lower column tube, an upper column tube, an axial limit block, and a rivet. The lower column tube 1 is sleeved outside the upper column tube 2. The axial limit block 3 and the upper column tube 2 are fixed by rivets 4 to ensure that the limit block 3 and the upper column tube 2 are not loose. The axial limit block 3 is located in the mounting groove on the surface of the lower column tube 1, and the axial limit block 3 is slidably connected to the mounting groove. The mounting groove is arranged along the axial direction of the lower column tube 1, which is convenient for the axial adjustment of the lower column tube 1 and the upper column tube 2.

[0020] See also Figure 4The axial limit block 3 includes a limit block body 33, a protruding structure 31, and a buffer structure 32. The bottom of the limit block body 33 is provided with a protruding structure 31, which is embedded in the mounting hole on the surface of the upper column tube 2. The two ends of the limit block body 33 are provided with buffer structures 32, and the buffer structures 32 are in contact with or separated from the inner wall of the mounting groove. The buffer structure 32 prevents the limit block body 33 from colliding with the inner wall of the mounting groove during the sliding process in the mounting groove.

[0021] The protrusion structure 31 is interference fit with the mounting hole of the upper column tube 2 to ensure that the protrusion structure 31 is firmly installed with the upper column tube 2. The main function of the protrusion structure 31 is to prevent the rivet 4 from breaking during the axial adjustment process. There are two protrusion structures 31, which are respectively located on both sides of the rivet 4 to achieve a better protection effect.

[0022] The buffer structure 32 includes two buffer arms, the connecting parts of the buffer arms are connected to the limit block body 33, and gaps are provided between the buffer parts of the buffer arms and the limit block body 33 and between the buffer parts of the two buffer arms.

[0023] The limiting block body 33 , the protruding structure 31 , and the buffer structure 32 are an integrated structure.

[0024] In the utility model, when the lower column tube 1 and the upper column tube 2 are axially adjusted, the axial limit block 3 slides in the installation groove of the lower column tube 1, providing effective limit for the axial adjustment. During the axial adjustment process, the axial limit block 3 may hit the inner wall of the installation groove of the lower column tube 1. The buffer structure 32 and the protruding structure 31 can prevent the rivet 4 from being directly hit and causing the collapse force to fail, and can also meet the adjustment durability requirements and ensure the reliability of the column performance.

[0025] When a violent impact occurs and collapse occurs, the impact force drives the upper column tube 2 to move downward, and the axial limit block 3 hits the inner wall of the installation groove of the lower column tube 1. The impact force breaks the rivet 4 and the protruding structure 31. The rivet 4 and the protruding structure 31 provide peak force for collapse to ensure collapse performance.

[0026] The utility model not only meets the collapse performance and provides the peak force required by customers, but also ensures that the axial adjustment provides effective limit through the combination of the axial limit block and the rivet. At the same time, the buffer structure and the protrusion structure of the axial limit block prevent the rivet from breaking and failing during the axial adjustment process, thereby ensuring the reliability of the performance of the pipe column. The utility model has the advantages of simple structure, small space occupation and low cost.

Claims

1. A mechanical pipe column axial limit collapse energy absorption mechanism, comprising a lower column tube, an upper column tube, an axial limit block, and a rivet, wherein the lower column tube (1) is sleeved outside the upper column tube (2), Features: The axial limit block (3) is fixed to the upper column tube (2) by means of rivets (4), the axial limit block (3) is located in a mounting groove on the surface of the lower column tube (1), and the axial limit block (3) is slidably connected to the mounting groove. The axial limit block (3) comprises a limit block body (33), a protruding structure (31), and a buffer structure (32); the bottom of the limit block body (33) is provided with a protruding structure (31); the protruding structure (31) is embedded in a mounting hole on the surface of the upper column tube (2); the two ends of the limit block body (33) are provided with buffer structures (32); the buffer structures (32) are in contact with or separated from the inner wall of the mounting groove.

2. A mechanical pipe string axial limit collapse energy absorption mechanism according to claim 1, Features: The protruding structure (31) is interference-fitted with the mounting hole of the upper column tube (2).

3. The mechanical pipe string axial limit collapse energy absorption mechanism according to claim 1, Features: The mounting groove is arranged along the axial direction of the lower column tube (1).

4. The mechanical pipe string axial limit collapse energy absorption mechanism according to claim 1, Features: The buffer structure (32) comprises two buffer arms, the connecting portion of the buffer arm is connected to the limit block body (33), and gaps are provided between the buffer portion of the buffer arm and the limit block body (33) and between the buffer portions of the two buffer arms.

5. The mechanical pipe string axial limit collapse energy absorption mechanism according to claim 1, Features: The limit block body (33), the protruding structure (31) and the buffer structure (32) are an integrated structure.

6. The mechanical pipe string axial limit collapse energy absorption mechanism according to claim 1, Features: There are two protruding structures (31), which are respectively located on two sides of the rivet (4).

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