阅读说明：本技术 汽车转向管柱溃缩吸能机构 (Automobile steering column collapse energy absorption mechanism ) 是由 张育权 张之锐 郑鸿云 于 2020-11-13 设计创作，主要内容包括：本发明涉及一种汽车转向管柱溃缩吸能机构,转向内管装配在转向外管中,吸能条轴向安装在转向内管外侧,溃缩支架与连接支架固定连接,连接支架相对转向外管固定,溃缩支架的上、下两侧分别设有朝向吸能条的翻边,两侧相对的翻边上分别对应、间隔设有向相对侧凸起的第一凸包和第二凸包,吸能条上沿溃缩方向设有第一精冲段、第二精冲段和第三精冲段,溃缩支架压装连接在吸能条上,原始安装状态以及发生第一段溃缩时所述第一凸包与第二精冲段过盈配合、第二凸包与第三精冲段过盈配合,发生第二段溃缩时所述第一凸包与第一精冲段过盈配合、第二凸包与第一精冲段和第二精冲段间隙配合。本发明结构简单,集成度高,能够实现转向管柱的平稳溃缩。(The invention relates to a crumple energy absorption mechanism of an automobile steering column, wherein a steering inner tube is assembled in a steering outer tube, the energy absorbing strip is axially arranged on the outer side of the steering inner tube, the crumpling support is fixedly connected with the connecting support, the connecting support is fixed relative to the steering outer tube, the upper side and the lower side of the crumpling support are respectively provided with flanges facing the energy absorbing strip, the flanges opposite to the two sides are respectively corresponding to each other and are provided with a first convex hull and a second convex hull protruding towards the opposite sides at intervals, the energy absorbing strip is provided with a first fine punching section, a second fine punching section and a third fine punching section along the crumpling direction, the crumpling support is connected to the energy absorbing strip in a press-fitting mode, the first convex hull is in interference fit with the second fine punching section, the second convex hull is in interference fit with the third fine punching section in an original installation state and when the first section crumpling occurs, and the first convex hull is in clearance fit with the first fine punching section and the second fine punching section when the second section crumpling occurs. The steering column has the advantages of simple structure and high integration level, and can realize stable collapse of the steering column.)

1. The utility model provides an energy-absorbing mechanism that contracts is crumpled to car steering column, is including turning to inner tube (2) and turning to outer tube (11), turn to inner tube (2) can be along turning to outer tube (11) axial displacement ground assemble in turning to outer tube (11), its characterized in that: the energy absorption device is characterized by further comprising an energy absorption strip (5), a crumpling support (8) and a connecting support (6), wherein the energy absorption strip (5) is arranged on the outer side of the steering inner tube (2) along the axial direction of the steering inner tube (2), the crumpling support (8) is fixedly connected with the connecting support (6), the connecting support (6) is fixed relative to the steering outer tube (11), flanges facing the energy absorption strip (5) are respectively arranged on the upper side and the lower side of the crumpling support (8), a first convex hull (8-3) and a second convex hull (8-2) which are convex towards the opposite sides are respectively arranged on the flanges opposite to each other at intervals, the first convex hull (8-3) and the second convex hull (8-2) are sequentially distributed along the crumpling direction, a first fine blanking section (5-3), a second fine blanking section (5-4) and a third fine blanking section (5-6) are arranged on the energy absorption strip (5) along the crumpling direction, the width of the third fine blanking section (5-6) is larger than that of the first fine blanking section (5-3), the width of the first fine blanking section (5-3) is larger than that of the second fine blanking section (5-4), the crumple support (8) is connected to the energy absorption strip (5) in a press-fitting mode, the first convex hull (8-3) and the second fine blanking section (5-4) are in interference fit, the second convex hull (8-2) and the third fine blanking section (5-6) are in interference fit in an original installation state and when the first section crumples, the first convex hull (8-3) and the first fine blanking section (5-3) are in interference fit, and the second convex hull (8-2) and the first fine blanking section (5-3) and the second fine blanking section (5-4) are in clearance fit when the second section crumples.

2. The automobile steering column crumple energy absorption mechanism of claim 1, wherein: the energy absorption strip (5) is sequentially provided with a first fixing rivet hole (5-1), a second fixing rivet hole (5-2), a first fine blanking section (5-3), a second fine blanking section (5-4), a third fixing rivet hole (5-5) and a third fine blanking section (5-6) along the collapsing direction, and the energy absorption strip (5) is fixedly installed on the steering inner tube (2) through the first fixing rivet hole (5-1) in which a first rivet pin (3) is installed, the second fixing rivet hole (5-2) in which a second rivet pin (4) is installed, and the third fixing rivet hole (5-5) in which a third rivet pin (9) is installed respectively.

3. The automobile steering column crumple energy absorption mechanism of claim 1, wherein: the connecting support is characterized in that a first pin hole (6-1) and a crumpling support connecting hole (6-2) are formed in the connecting support (6), a second pin hole (8-4) and a bending connecting end (8-1) are formed in the crumpling support (8), the connecting support (6) and the crumpling support (8) are connected through a rivet (7) arranged in the first pin hole (6-1) and the second pin hole (8-4), and the bending connecting end (8-1) is inserted into the crumpling support connecting hole (6-2) to form interference fit connection.

4. The automobile steering column crumple energy absorption mechanism of claim 1, wherein: the steering outer tube (11) is provided with an adjusting motor assembly (10), the connecting support (6) is provided with a fixing hole (6-3), and the connecting support (6) is connected with an adjusting motor screw rod of the adjusting motor assembly (10) through a mounting bolt in the fixing hole (6-3).

5. The automobile steering column crumple energy absorption mechanism of claim 1, wherein: the steering outer tube (11) is arranged on a whole vehicle beam, and an upper steering shaft (1) is rotatably arranged in the steering inner tube (2).

Technical Field

The invention belongs to the technical field of automobile steering systems, and particularly relates to a crumpling energy absorption mechanism of an automobile steering column.

Background

With the development of the automobile industry and the improvement of the requirements of people on the comfort and safety of automobile driving, the crumple energy-absorbing steering system with the angle adjusting function is gradually applied. When a violent impact occurs to an automobile, a driver often leans forwards due to a strong stopping action, the chest of a human body collides with a steering wheel, and in order to reduce the impact force borne by the chest of the driver who is impacted by a steering column, the steering column of some automobiles is designed into a two-to-three-section crumple form due to external extrusion during impact so as to disperse some impact force transmitted to the human body by the steering column due to impact.

The existing steering column crumpling mechanism generally has the defects of complex structure, low integration level and complex process requirements, and also has the defects of difficulty in controlling the crumpling force once collision occurs and large fluctuation of the crumpling force.

Disclosure of Invention

The invention aims to solve the technical problem of providing a crumpling energy absorption mechanism of an automobile steering column, which has a simple structure and high integration level and can realize stable crumpling of the steering column.

The technical scheme adopted by the invention for solving the technical problems is to provide a crumpling energy absorption mechanism of an automobile steering column, which comprises a steering inner pipe and a steering outer pipe, wherein the steering inner pipe can be assembled in the steering outer pipe in an axially movable manner along the steering outer pipe, the crumpling energy absorption mechanism also comprises an energy absorption strip, a crumpling support and a connecting support, the energy absorption strip is arranged at the outer side of the steering inner pipe along the axial direction of the steering inner pipe, the crumpling support is fixedly connected with the connecting support, the connecting support is fixed relative to the steering outer pipe, the upper side and the lower side of the crumpling support are respectively provided with flanges facing the energy absorption strip, the flanges opposite to the two sides are respectively provided with a first convex hull and a second convex hull which are convex towards the opposite sides at intervals, the first convex hull and the second convex hull are sequentially distributed along the energy absorption crumpling direction, the crumpling strip is provided with a first fine blanking section, a second fine blanking section and a third fine blanking section along the crumpling, the width of first essence towards the section is greater than the width that the second essence towards the section, the support pressure equipment that contracts of bursting is connected on the energy-absorbing strip, and original installation status and when taking place first section and ulcerate and contract first convex closure and second essence towards section interference fit the second convex closure and third essence towards section interference fit when taking place the second section and ulcerate and contract first convex closure and first essence towards section interference fit the second convex closure and second essence towards section and third essence towards section clearance fit.

The energy absorption strip is sequentially provided with a first fixing riveting hole, a second fixing riveting hole, a first fine punching section, a second fine punching section, a third fixing riveting hole and a third fine punching section along the collapsing direction, and the energy absorption strip is fixedly arranged on the steering inner tube through a first riveting pin arranged in the first fixing riveting hole, a second riveting pin arranged in the second fixing riveting hole and a third riveting pin arranged in the third fixing riveting hole respectively.

The connecting support is provided with a first pin hole and a crumple support connecting hole, the crumple support is provided with a second pin hole and a bending connecting end, the connecting support and the crumple support are connected through mounting rivets in the first pin hole and the second pin hole, and the bending connecting end is inserted into the crumple support connecting hole to form interference fit connection.

The steering outer tube is provided with an adjusting motor assembly, the connecting support is provided with a fixing hole, and the connecting support is connected with an adjusting motor screw rod of the adjusting motor assembly through a mounting bolt in the fixing hole.

The outer steering tube is mounted on a beam of the whole vehicle, and an upper steering shaft is rotatably mounted in the inner steering tube.

Advantageous effects

The invention can realize two-section crumpling and energy absorbing processes, the first section absorbs most energy generated by collision by using the double-point friction action of the energy absorbing strip and the crumpling support, the second section realizes stable crumpling and contracting force by using the single-point friction action between the energy absorbing strip and the crumpling support, the structure is simple, the integration level is high, and the stable crumpling and contracting of the steering column can be realized.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is an exploded view of the present invention.

FIG. 3 is a schematic front view of a crush stent.

FIG. 4 is a side view of a crush stent.

FIG. 5 is a schematic structural view of an energy absorber strip.

Fig. 6 is a schematic structural view of the connecting bracket.

FIG. 7 is a schematic diagram of a collapse of the energy absorbing mechanism.

Detailed Description

The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.

As shown in fig. 1 and 2, the collapse energy absorption mechanism of the steering column of the automobile comprises an upper steering shaft 1, a steering inner tube 2, a steering outer tube 11, an energy absorption strip 5, a collapse bracket 8 and a connecting bracket 6. The outer steering tube 11 is mounted on the vehicle cross member, the inner steering tube 2 has the upper steering shaft 1 rotatably mounted therein, and the inner steering tube 2 is fitted in the outer steering tube 11 so as to be axially movable along the outer steering tube 11.

The energy absorbing strip 5 is arranged outside the steering inner tube 2 along the axial direction of the steering inner tube 2. As shown in FIG. 5, the energy absorbing strip 5 is provided with a first fixing rivet hole 5-1, a second fixing rivet hole 5-2, a first fine blanking section 5-3, a second fine blanking section 5-4, a third fixing rivet hole 5-5 and a third fine blanking section 5-6 in sequence along the collapsing direction. The energy absorption strip 5 is fixedly arranged on the steering inner tube 2 through a first rivet pin 3 arranged in a first fixing rivet hole 5-1, a second rivet pin 4 arranged in a second fixing rivet hole 5-2 and a third rivet pin 9 arranged in a third fixing rivet hole 5-5. The width of the third fine blanking section 5-6 is larger than that of the first fine blanking section 5-3, and the width of the first fine blanking section 5-3 is larger than that of the second fine blanking section 5-4.

An adjusting motor assembly 10 is installed on the steering outer tube 11 through a bolt, a fixing hole 6-3 is formed in the connecting support 6, and the connecting support 6 is connected with an adjusting motor screw rod of the adjusting motor assembly 10 through a mounting bolt in the fixing hole 6-3. The collapsing bracket 8 is fixedly connected with the connecting bracket 6. The connecting support 6 is provided with a first pin hole 6-1 and a crumple support connecting hole 6-2, the crumple support 8 is provided with a second pin hole 8-4 and a bent connecting end 8-1, the connecting support 6 and the crumple support 8 are connected through the first pin hole 6-1 and a rivet 7 arranged in the second pin hole 8-4, and the bent connecting end 8-1 is inserted into the crumple support connecting hole 6-2 to form interference fit connection.

As shown in fig. 3 and 4, the upper and lower sides of the crush can 8 are respectively provided with flanges facing the energy-absorbing bar 5, and the flanges opposite to each other are respectively provided with a first convex hull 8-3 and a second convex hull 8-2 protruding to opposite sides at intervals. The first convex hull 8-3 and the second convex hull 8-2 are sequentially distributed along the collapsing direction, and the collapsing bracket 8 is connected to the energy absorbing strip 5 in a press-fitting mode, so that the first convex hull 8-3 is in interference fit with the second fine blanking section 5-4, and the second convex hull 8-2 is in interference fit with the third fine blanking section 5-6.

When collision and crumple occur, the crumple bracket 8 and the connecting bracket 6 are kept fixed, and the energy absorbing strip 5 slides relative to the crumple bracket 8 along the crumple direction, so that two sections of crumple energy absorbing processes are realized. As shown in fig. 6, when the first section of the crumple occurs, the first convex hull 8-3 is in interference fit with the fine blanking surface of the second fine blanking section 5-4, the second convex hull 8-2 is in interference fit with the fine blanking surface of the third fine blanking section 5-6, and most of energy generated by collision is absorbed by using the double-point friction effect between the energy absorbing strip 5 and the crumple support 8; the energy absorption strip 5 moves and enters a second crumpling process, at the moment, the first convex hull 8-3 is in interference fit with a fine punching surface of the first fine punching section 5-3, the second convex hull 8-2 is in clearance fit with the first fine punching section 5-3 and the second fine punching section 5-4, stable crumpling force is achieved by using the single-point friction effect between the energy absorption strip 5 and the crumpling support 8, the interference between the first convex hull 8-3 and the first fine punching section 5-3 is increased, the friction effect is enhanced, and the energy absorption efficiency can be improved.