CN213168267U

CN213168267U - Steering column crumpling mechanism with guiding function

Info

Publication number: CN213168267U
Application number: CN201922308780.7U
Authority: CN
Inventors: 陈艳; 薛峰; 于亚菲
Original assignee: Nanjing Donghua Intelligent Steering System Co ltd
Current assignee: Nanjing Donghua Intelligent Steering System Co ltd
Priority date: 2019-12-20
Filing date: 2019-12-20
Publication date: 2021-05-11
Anticipated expiration: 2029-12-20

Abstract

The utility model relates to a steering column of area direction function mechanism that contracts bursts to solve and take place the head-on collision back when the vehicle, how to reduce the impact force problem of steering wheel to the driver human body. Belongs to the technical field of automobile steering columns. The mechanism comprises an input shaft, an upper column tube, a lower column tube, an upper cover, a handle assembly, a supporting screw rod, an adjusting bracket, a collapsing block and a spring. The upper column tube and the lower column tube are connected in an interference fit mode, and the adjusting support is connected with the upper column tube through a supporting screw rod. The adjusting bracket is connected with the crumple block through a chute, a spring is welded in the chute of the crumple block, and the limit value of the crumple force is adjusted by changing the shape, size and elasticity of the spring. After the front collision of the vehicle occurs, the collapse mechanism can effectively absorb the impact capacity to play a certain buffering role, and meanwhile, the collapse guide structure can prevent the tubular column from falling off, so that the injury to the human body is reduced. The structure has the advantages of simple structure, lower cost and lighter weight.

Description

Steering column crumpling mechanism with guiding function

Technical Field

The utility model relates to a steering column of area direction function mechanism that contracts bursts, specific saying so one kind is used for after the vehicle takes place the head-on collision, can effectual absorption steering wheel play certain cushioning effect to driver's impact force, reduces the injury to driver's human body. Belongs to the technical field of automobile parts.

Background

The design of the steering column crumple mechanism is one of the bases for measuring the safety of an automobile, and the principle of the crumple mechanism is as follows: when the vehicle is in frontal collision, huge impact force is transmitted to the steering wheel through a human body, the steering wheel transmits the force to the input shaft, the input shaft receives an axial force, the axial force enables the upper column tube to move downwards relative to the lower column tube, the adjusting bracket absorbs energy and moves downwards, and the adjusting bracket and the upper column together slide relative to the crumple block fixed on the vehicle body through the bolt. The collapse mechanism can effectively absorb impact energy and play a certain buffering role, and meanwhile, the collapse guide structure can prevent the tubular column from falling and reduce the injury to a human body.

In the current automobile product market, a steering column collapse mechanism is designed with a five-flower eight-door structure, the most common mechanism is a collapse mechanism which is formed by adopting an injection molding block, an energy-absorbing steel belt and friction between an upper column tube and a lower column tube and meets the collapse requirement of a column, but the collapse absorption capacity of the mechanisms at present has a large variation range, the stability of collapse energy absorption is difficult to ensure, and a part of collapse mechanisms which are not added with a collapse guide mechanism cannot well protect a driver; and a part of the added collapse guide mechanisms are complex in structure, high in cost and heavy in weight. Therefore, it is necessary to design a steering column collapse mechanism having a simple structure and a guiding function.

SUMMERY OF THE UTILITY MODEL

In view of the complicated structure, higher cost and heavier weight of the conventional collapse guide mechanism, the utility model aims to provide a steering column collapse mechanism with simple structure and guide function.

The purpose of the utility model is to realize through the following technical scheme:

a steering column crumpling mechanism with a guiding function comprises an input shaft, an upper column tube, a handle assembly, a supporting screw rod, an adjusting support, a crumpling block, a spring, a lower column tube and an upper cover. The input shaft and the upper column tube are connected through a clamp spring and a bearing, the upper column tube and the lower column tube are in interference fit connection, the upper column tube and the adjusting support are connected through a supporting screw rod, the adjusting support is connected to the vehicle body through a crumple block through a bolt, the spring is welded in a groove of the crumple block, and the lower column tube and the upper cover are in interference fit connection.

Furthermore, the crumple block is arranged on the adjusting bracket, the adjusting bracket is provided with a groove at the position for arranging the crumple block, the groove width is smaller than the total width of the crumple block and larger than the width of the crumple block after the groove is formed, the tail part of the adjusting bracket is not provided with a flanging, and the total width of the crumple block is smaller than the distance between the ends of the adjusting bracket without the flanging, so that the crumple block has enough length to ensure that the crumple block can have good guiding effect in the crumple stroke range. The appropriate length of the crumple block can be selected to effectively prevent the steering column from falling in the crumple stroke range. Therefore, the technical problem that the personal safety of a driver is influenced due to the fact that the collapse is not caused and the steering column falls off because the collapse energy absorption range of the conventional column assembly is large is solved.

Furthermore, springs are welded on the crumple block, two sides of the crumple block are respectively provided with a groove, the groove width ratio is larger than the thickness of the adjusting support, two opposite sides of the single-side groove are connected with the two springs through a welding process, and the springs can be combined with the actual crumple force range to design the shape, the length and the elasticity of the springs.

Furthermore, after the spring is welded on the collapse block, the collapse block is matched with the adjusting support, and the collapse force is controlled through the clamping force between the spring and the adjusting support.

Furthermore, the bottom of the crumple block is provided with a groove, and the groove depth of the bottom of the crumple block can be designed by combining with the actual crumple stroke, so that the crumple guide effect is achieved.

Furthermore, the magnitude of the collapsing force can be controlled by the force of interference fit between the upper column tube and the lower column tube and the clamping force between the spring and the adjusting bracket.

Further, the maximum collapsing stroke is controlled by the distance from the lower end face of the upper column tube to the upper cover plate.

Drawings

FIG. 1 is a schematic view of a steering column collapse mechanism;

FIG. 2 is a schematic view of the mounting connection of the crush boxes on the tuning bracket to the vehicle body;

FIG. 3 is a schematic view of the crush mass mounted on the tuning bracket;

FIG. 4 is a schematic view of adjusting the size of a stent;

FIG. 5 is a schematic view of the crush mass before welding with the spring;

FIG. 6 is a schematic view of the crush mass after welding with the spring;

FIG. 7 is a schematic view of the bottom slot of the crush block;

FIG. 8 is a schematic view of an upper pillar tube welding auxiliary support;

FIG. 9 is a schematic view of the upper column tube with the auxiliary support assembly mounted to the handle;

the reference signs are: 1-input shaft, 2-bearing, 3-clamp spring, 4-upper column tube, 5-lower column tube, 6-upper cover, 7-handle assembly, 7-1-handle, 7-2-support screw, 8-movable cam, 9-fixed cam, 10-gasket 1, 11-spring 1, 12-gasket 2, 13-plane bearing, 14-locknut, 15-adjusting bracket, 16-collapsing block, 17-spring and 18-fixing bolt.

Detailed Description

Examples

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and the detailed description. It should be understood that the detailed description and specific examples, while indicating the scope of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.

Objects, advantages and features of the present invention will be illustrated and explained by the following non-limiting description of preferred embodiments. These embodiments are merely exemplary embodiments for applying the technical solutions of the present invention, and all technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the scope of the present invention.

As shown in fig. 1-7, the utility model discloses a steering column crumple mechanism with guiding function, which comprises an input shaft, an upper column tube, a lower column tube, a handle assembly, an adjusting bracket, a crumple block and a spring.

The input shaft (1) is connected with the upper column tube (4) through the snap spring (3) and the bearing (2), the upper column tube (4) is in interference fit connection with the lower column tube (5), and the lower column tube (5) is in interference fit connection with the upper cover (6); the shaft of the handle assembly (7) passes through the waist-shaped holes on the movable cam (8), the fixed cam (9) and the adjusting bracket (15) and the through hole, the gasket (10), the spring (11), the gasket (12) and the plane bearing (13) on the auxiliary bracket of the upper column tube (4) and is fastened by the locknut (14) to complete the connection of the adjusting bracket and the upper column tube (4). The adjusting bracket (15) is provided with a collapsing block (16) and a spring (17); the crumple block (16) on the adjusting bracket is fixed with the vehicle body through a bolt (18). The left side and the right side of the crush block (16) are respectively provided with a groove (as shown in figure 5), the groove width L2 is slightly larger than the thickness d3 of the adjusting bracket (15) (as shown in figure 4), two opposite surfaces of a single-side groove are respectively welded with a spring (17) (as shown in figure 6), and the left side and the right side of the crush block (16) are provided with 4 springs (17) (as shown in figure 1). The shape and length of the spring (17) can be designed in combination with the actual required range of the collapsing force. The bottom of the crumple block (16) is provided with a groove (as shown in figure 7), the groove depth of the bottom of the crumple block (16) can be designed by combining the required crumple stroke, and the groove at the bottom plays a role in crumple guide; the contact surface of the adjusting bracket (15) matched with the crumple block (16) is provided with a groove, the groove width d1 (shown in figure 4) is smaller than the total width L1 (shown in figure 5) of the crumple block and larger than the width L3 (shown in figure 7) of the crumple block after the groove is formed, the lower part of the adjusting bracket is not flanged, the total width L1 of the crumple block (16) is smaller than the distance d2 of the non-flanged tail part of the adjusting bracket (15), and the purpose is to ensure that the enough length enables the crumple block (16) to play a guiding role in the crumple stroke range; after the spring is welded on the collapse block (16), the magnitude of the collapse force is controlled by the clamping force between the spring (17) and the adjusting bracket (15).

After the front collision of the vehicle, the impact force applied to the steering wheel by a driver is transmitted to the input shaft (1) through the bearing (2) and the clamp spring (3), the input shaft (1) generates an axial force, and the axial force is transmitted to the adjusting bracket (15) through the upper column tube (4) and the handle assembly (7), so that the upper column tube (4), the handle assembly (7) and the adjusting bracket (15) have the tendency of moving downwards. When the force is greater than the sum of the clamping force of the spring (17) in the groove of the crumpling block (16) to the adjusting support (15) and the interference fit force of the upper column tube (4) and the lower column tube (5), the upper column tube (4), the handle assembly (7) and the adjusting support (15) start to move downwards, the steering column collapses, the crumpling block (16) is fixed on a vehicle body by the bolt (18) and keeps still, the size of the suction capacity can be changed by changing the shape, the length and the elasticity of the spring (17) in the grooves at two sides of the crumpling block (16), the adjustment support (15) is guaranteed to slide relative to the crumpling block (16) within the range of safe crumpling force, and meanwhile, the crumpling block (16) with proper length can be selected to effectively prevent the tubular column from falling within the range of crumpling stroke. Therefore, the technical problem that the personnel safety of a driver is influenced by non-collapse and falling of the tubular column due to the large collapse energy absorption range of the conventional tubular column assembly is solved.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides a steering column of area direction function mechanism that contracts that bursts which characterized in that: the mechanism comprises an input shaft, an upper column tube, a lower column tube, an upper cover, a handle assembly, a supporting screw rod, an adjusting bracket, a collapsing block and a spring which are connected in sequence; the input shaft passes through jump ring, bearing connection with last column tube, it is connected through supporting screw with the regulation support to go up the column tube, the regulation support is connected on the automobile body through the piece that bursts to contract by bolted connection, the spring welding is in the piece that bursts to contract, just it connects for interference fit with lower column tube to go up the column tube, lower column tube and upper cover are interference fit and connect.

2. The steering column collapse mechanism with guidance function according to claim 1, wherein: the crumple block is arranged on the adjusting bracket through sliding grooves on two sides of the crumple block, the adjusting bracket is provided with a slot on a contact surface matched with the crumple block, and the width of the slot is smaller than the width of the crumple block and larger than the width of the crumple block after the crumple block is slotted; the tail of the adjusting bracket is not flanged, and the width of the crumple block is smaller than the distance of the adjusting bracket without flanging, so that the crumple block can slide downwards on the bracket without falling off.

3. The steering column collapse mechanism with guidance function according to claim 1, wherein: two opposite surfaces of the sliding grooves on two sides of the collapse block are respectively welded with a spring, and the springs on the collapse block control the clamping force of the adjusting bracket to carry out collapse force control.

4. The steering column collapse mechanism with guide function according to claim 3, wherein: the bottom of the crumple block is provided with a groove.

5. The steering column collapse mechanism with guidance function according to claim 1, wherein: the maximum stroke of the collapsing of the upper column tube is limited by the distance from the bottom surface of the upper column tube to the upper cover.

6. The steering column collapse mechanism with guidance function according to claim 1, wherein: the upper column tube and the lower column tube are connected in an interference fit mode to balance the axial collapse force.