CN205737679U - A kind of endergonic structure of automobile turning lower shaft - Google Patents

Abstract

This utility model relates to the endergonic structure of a kind of automobile turning lower shaft, it includes the column casing of mandrel and one end open, in described spindle sleeve is located at the open end of column casing and both air-tight fit, described column casing is closed and is offered through damping hole on the barrel of end, is arranged with the gum sleeve closing damping hole external port outside column casing.This programme solves the problem that in prior art, automobile turning lower shaft absorbs collision energy weak effect.

Description

A kind of endergonic structure of automobile turning lower shaft

Technical field

This utility model relates to the collision safety technology of automobile, the endergonic structure of a kind of automobile turning lower shaft.

Background technology

At present, the collision safety of automobile requires more and more higher, each main engine plants when Automobile Design to passive security technology Requiring more and more higher, country has also formulated clear and definite regulation in related fields, such as clear stipulaties in GB GB11557-89, Big impact force 11.123KN, steering wheel maximum displacement backward must not exceed 127mm.

The energy absorption device of energy-absorbing steering tube column, frequently with multistage collapsing structure, is typically turning to upper shaft to arrange energy absorption device, And play a major role；Turning to lower axle to be typically not provided with energy absorption device, if arranged, main employing injection molding type collapsing structure (sees , between mandrel 1 and column casing 2, there is injection shear constitution in Fig. 1) or the sliding endergonic structure of pleodont.

Based on above-mentioned situation, existing energy-absorbing tubing string relies primarily on and turns to upper shaft to absorb collision energy, to turning to lower axle Utilize less or insufficient；Secondly existing common energy-absorbing tubing string absorption collision energy relies primarily on frictional force consumption, consumption Finite energy, most energy is still absorbed by human body, it is impossible to human body is formed well protection.

Summary of the invention

The purpose of this utility model is to provide the endergonic structure of a kind of automobile turning lower shaft, its simple in construction, it is possible to solve The problem that certainly in prior art, automobile turning lower shaft absorbs collision energy weak effect.

The technical solution of the utility model is as follows:

The endergonic structure of a kind of automobile turning lower shaft, it includes that the column casing of mandrel and one end open, described spindle sleeve are located at In the open end of column casing and both air-tight fit, described column casing is closed and is offered through damping hole, post on the barrel of end Cylinder is outer is arranged with the gum sleeve closing damping hole external port.

Further, by spline air-tight fit between described mandrel and column casing.

Column casing one end of this programme is closed, and mandrel, and both air-tight fit are entangled in one end, forms a sealing in column casing Chamber.Between mandrel and column casing during slide in opposition, the most between the two by friction consumed energy, on the other hand compression seal The air of intracavity, absorbs energy, and air overflows the damping force needing to overcome between damping hole and gum sleeve, needs Dissipated energy Amount, absorbs impact energy during collision with this.Simultaneously because the one-way valve structures that damping hole and dress gum sleeve are formed, at the heart When axle and column casing slide in opposition to extreme limit of travel produces resilience, annular seal space produces negative pressure, make between the two cannot resilience or Resilience slowly, plays unidirectional damping control, in order to avoid personnel are damaged by resilience force.

This utility model overcomes the deficiency that prior art exists, and enables to turn to lower axle to absorb more collision energy, Extend impact force and act on action time of human body, to reduce the impact force suffered by driver, preferably protection driver from Injury.This programme energy-absorbing effect is preferable, it is not necessary to other attached endergonic structures, hence in so that have axle tool under the turning to of this structure Have that simple in construction, volume be little, lightweight, the advantage of low cost.

Accompanying drawing explanation

Fig. 1 is the injection molding type collapsing structure schematic diagram of the downward axle of prior art transfer；

Fig. 2 is structural representation of the present utility model；

Fig. 3 is the partial, detailed view of structure shown in Fig. 2.

Detailed description of the invention

The utility model will be further described with embodiment below in conjunction with the accompanying drawings.

The problem that this utility model exists for prior art, the endergonic structure of the automobile turning lower shaft of proposition includes mandrel 1 and the column casing 2 of one end open, as shown in Figures 2 and 3, in described mandrel 1 is set in the open end of column casing 2 and both are airtight Coordinating, during both slide in opposition, compressed air absorbs energy and by friction consumed energy.On the basis of this, described column casing 2 is closed Offer through damping hole 4 on the barrel of end, outside column casing 2, be arranged with the gum sleeve 3 closing damping hole 4 external port, shape Becoming one-way valve structures, during compressed air, air needs to overcome the damping force between gum sleeve 3 and damping hole 4, dissipation energy.

When colliding, turn to upper shaft energy absorber to play main energy-absorbing function, absorb major part energy, now, collision Power is delivered to turn to lower axle by upper and lower shaft coupling piece, when force value reaches the crumple power threshold value turning to lower axle, and mandrel 1 and post Cylinder 2 produces move toward one another, and the gas in the annular seal space 5 that mandrel, column casing surround can be compressed, and absorbs impact during collision with this Energy.Discharging gas dissipation energy by damping hole in compression process, regulation mandrel 1 is with column casing 2 relative moving speed simultaneously, When both move on to extreme limit of travel, producing resilience, at this moment mandrel 1 reversely moves and causes the annular seal space 5 in column casing 2 to produce negative pressure, Owing to the effect of gum sleeve 3 makes the negative pressure in column casing 2 to be reduced, make the relative column casing 2 of mandrel 1 cannot or slowly Ground resilience, plays unidirectional damping control action.So, the collision energy acting on human body just decreases, and unidirectional damping structure is protected Not resilience or slowly resilience after card mandrel compression, in order to avoid personnel are damaged by resilience force.

By spline air-tight fit between described mandrel 1 and column casing 2, when keeping sealing between the two, it is ensured that can Relatively slide.

Claims (2)

1. an endergonic structure for automobile turning lower shaft, including the column casing (2) of mandrel (1) and one end open, described mandrel (1) is overlapped In being located at the open end of column casing (2) and both air-tight fit, it is characterised in that: described column casing (2) is closed on the barrel of end Offer through damping hole (4), outside column casing (2), be arranged with the gum sleeve (3) closing damping hole (4) external port.

The endergonic structure of a kind of automobile turning lower shaft the most according to claim 1, it is characterised in that: described mandrel (1) with By spline air-tight fit between column casing (2).