CN204296398U - A kind of balancing pole elastic shock attenuation structure - Google Patents

Abstract

The utility model discloses a kind of balancing pole elastic shock attenuation structure, it is characterized in that, comprising lower end is columnar balancing pole epimere, also comprising upper end is columnar balancing pole hypomere, the upper end of balancing pole hypomere and balancing pole epimere lower end coordinate formation can socket join structure in axial sliding, also comprise compression helical spring and a draft helical spring, described compression helical spring abuts in the inner chamber being arranged at balancing pole hypomere and balancing pole epimere vertically, the mounting of described draft helical spring two ends is fixed on the mounting round platform of balancing pole hypomere and the formation of balancing pole epimere outer surface evagination.It is simple that the utility model has structure, conveniently installs, reliable and stable and be beneficial to the advantage ensureing balancing pole counterbalance effect, makes to have employed balancing pole mechanism of the present utility model, can have the function of good bumper and absorbing shock, improve vehicle safety.

Description

A kind of balancing pole elastic shock attenuation structure

Technical field

The utility model relates to a kind of rear-guard formula electric motor car balancing pole, particularly relates to a kind of balancing pole elastic shock attenuation structure.

Background technology

Electric motor car is using battery as energy source, by the parts such as controller, motor, is mechanical energy motion by electric energy conversion, to control the vehicle that size of current changes speed.First electric motor car produced in 1834, and it is by DC motor Driver.Even to this day, electric motor car there occurs great variety, and type is also varied.Wherein, it is power that electric automobile (EV) refers to vehicle power, drives wheels travel with motor, meets the vehicle of road traffic, security legislation requirements.Due to less relative to orthodox car to ambient influnence, its prospect is extensively had an optimistic view of, but current techniques is still immature.

In electric automobile, " energy-conservation and new-energy automobile industrial development planning " clearly reports to the State Council, and " planning " is thus lifted to national strategy height, is intended to arrange the new office of automobile industry.As one of seven great strategy new industries that country determines, new-energy automobile will reach 1,000 hundred million yuan in coming 10 years planned amount invested, and sales volume scale locks the first in the world.To the year two thousand twenty, new-energy automobile realizes industrialization, energy-conservationly reaches advanced world standards with new-energy automobile and key components and parts technology, and pure electric automobile and plug-in hybrid-power automobile market maintenance reach 5,000,000.Analyses and prediction, from 2012 to 2015, Chinese market electric motor car sales volume average annual growth rate will reach about 40%, and wherein major part is sold from pure electric vehicle, and by 2015, China will become the electric motor car market of Fia.

Therefore the research and development to the various technology in electric automobile field, become the direction of automotive expert research.

Existing electric automobile, it is generally the Structural Development of imitated general-utility car during research and development, such as a kind of rear axle assy disclosed in CN201410249550, just belong to this technology, wherein there is following defect: when 1, automobile is impacted, due to automobile by lateral impact time the easiest causing death, and electric automobile due to weight lighter compared with general-utility car, if therefore easily cause driver dead under bearing lateral impact situation especially, security is poor.2 in damping device, damping spring and damper are the structures of the damping damping unit directly adopted in automobile, be about to both integrate, but existing damping damping unit is all for general-utility car development and Design, the matching degree of its damping performance and damping capacity adapts to general-utility car, and electric automobile own wt is far below general-utility car, therefore existing damping damping unit cannot regulate separately damping performance and damping capacity, if both performances are not mated can cause influencing each other of performance, therefore the integrated form damping damping unit of general-utility car is unsuitable for applying in electric automobile.3, wherein towing arm is to weld or to be fixedly connected on axle casing in two modes with the bolted of straight line, and damping effect is poor and installation is inconvenient.

In order to solve above-mentioned first problem, applicant considers the balancing pole connected between rear axle housing body and vehicle frame to be set to two sections, and connected by an elastic shock attenuation structure mainly containing spring formation, bumper and absorbing shock is carried out like this by elastic shock attenuation structure, the impact degree that lateral impact causes vehicle body can be slowed down, improve the security of driver and passenger.

But wherein, how elastic shock attenuation structure specifically should be arranged, structure can be had simple, conveniently to install, reliable and stable and be beneficial to the effect ensureing balancing pole equilibrium function, become the problem needing to be considered.

Utility model content

For above-mentioned the deficiencies in the prior art, the technical problem that the utility model primarily solves is: how to provide a kind of structure simple, convenient installation, reliable and stable and be beneficial to the balancing pole elastic shock attenuation structure ensureing balancing pole equilibrium function, make to have employed balancing pole mechanism of the present utility model, the function of good bumper and absorbing shock can be had, to improve vehicle safety.

In order to solve the problems of the technologies described above, the utility model have employed following technical scheme:

A kind of balancing pole elastic shock attenuation structure, it is characterized in that, comprising lower end is columnar balancing pole epimere, also comprising upper end is columnar balancing pole hypomere, the upper end of balancing pole hypomere and balancing pole epimere lower end coordinate formation can socket join structure in axial sliding, also comprise compression helical spring and a draft helical spring, described compression helical spring abuts in the inner chamber being arranged at balancing pole hypomere and balancing pole epimere vertically, and the mounting of described draft helical spring two ends is fixed on the mounting round platform of balancing pole hypomere and the formation of balancing pole epimere outer surface evagination.

In the utility model, balancing pole epimere and balancing pole hypomere adopt half end tube-in-tube structure, and sleeve sections can be made to lean on the mode of socket to provide elastic deformation space to realize bumper and absorbing shock.Spring is provided with a compression helical spring and a draft helical spring, like this, the impact of vehicle body side both direction can both realize bumper and absorbing shock by spring, simultaneously during normal vehicle operation, the elastic force of two springs is cancelled out each other, be conducive to the normal equilibrium function ensureing balancing pole, double swerve is excessive because balancing pole self exists certain elastic force to avoid vehicle body.Meanwhile, compression helical spring is installed in sleeve, and draft helical spring is installed on sleeve outward and by the mounting of mounting round platform, installs very convenient quick and Stability Analysis of Structures reliably, ensure that damping, buffering performance.

In sum, it is simple that the utility model has structure, convenient installation, reliable and stable and be beneficial to the advantage ensureing balancing pole counterbalance effect, make to have employed balancing pole mechanism of the present utility model, the function of good bumper and absorbing shock can be had, improve vehicle safety.

Accompanying drawing explanation

Fig. 1 is a kind of rear axle of electric automobile structural representation that have employed the utility model structure.

Fig. 2 is the side view of towing arm part partial structurtes separately in Fig. 1.

Fig. 3 is the structural representation of independent towing arm in Fig. 2.

Detailed description of the invention

The utility model is described in further detail for the rear axle of electric automobile that have employed the utility model structure below in conjunction with a kind of and accompanying drawing thereof.

During concrete enforcement: as shown in Figure 1-Figure 3, a kind of rear axle of electric automobile that have employed the utility model structure, comprises the rear axle housing body 1 of the tubular of horizontally set, and end, rear axle housing body 1 two ends is respectively arranged with brake drum 2, for installing wheel outside brake drum 2; Actuating unit is provided with in the middle part of rear axle housing body 1, actuating unit comprises the differential mechanism 3 be fixedly installed in the middle part of rear axle housing body 1, also comprise the motor 4 be fixed on differential mechanism 3, motor output shaft is connected with differential mechanism 3, and differential output shaft is connected with wheel by the power transmission shaft being positioned at rear axle housing body 1 inside; Also comprise front end to be connected with the main body of vehicle frame 8 being positioned at chassis position and the towing arm 5 that is connected with rear axle housing body of rear end; The upper surface that described rear axle housing body is positioned at actuating unit one side position also has free bearing 40 under the balancing pole upwards arranged, vehicle frame afterbody cross bar above described actuating unit opposite side position has free bearing 41 on the balancing pole that arranges downwards, hingedly between free bearing 41 on free bearing 40 and balancing pole under balancing pole is provided with balancing pole 22; Balancing pole 22 is provided with elastic shock attenuation structure.

The balancing pole of such setting is installed by free bearing and is connected, when automobile normal running, balancing pole can transmit the side force of left and right directions between vehicle frame and back axle, keep vehicle body left-right balance, when vehicle body suffers larger side impacts, the elastic shock attenuation structure on balancing pole plays a role, and carries out elastic shock attenuation buffering, slow down the impact degree that lateral impact causes vehicle body, improve the security of driver and passenger.

Wherein, described balancing pole 22 comprises balancing pole epimere 42 and balancing pole hypomere 43, balancing pole epimere 42 upper end is vertical block structure and is hinged on balancing pole on free bearing 41, balancing pole epimere 42 lower end is cylindrical shape, balancing pole hypomere 43 lower end is vertical block structure and under being hinged on balancing pole on free bearing 40, balancing pole hypomere 43 upper end be cylindrical shape and and formed can socket join structure in axial sliding in balancing pole epimere 42 lower end, described elastic shock attenuation structure also comprises a compression helical spring 44 and a draft helical spring 45, described compression helical spring 44 abuts vertically and is arranged in the inner chamber of balancing pole hypomere 43 and balancing pole epimere 42, the mounting of described draft helical spring 45 two ends is fixed on the mounting round platform 46 of balancing pole hypomere and the formation of balancing pole epimere outer surface evagination.

Like this, balancing pole epimere and balancing pole hypomere adopt half end sleeve to add the vertical block structure of half end, namely can facilitate the hinged installation of self, and sleeve sections can be made again to lean on the mode of socket to provide elastic deformation space to realize bumper and absorbing shock.Spring is provided with a compression helical spring and a draft helical spring, like this, the impact of vehicle body side both direction can both realize bumper and absorbing shock by spring, simultaneously during normal vehicle operation, the elastic force of two springs is cancelled out each other, be conducive to the normal equilibrium function ensureing balancing pole, double swerve is excessive because balancing pole self exists certain elastic force to avoid vehicle body.Meanwhile, compression helical spring is installed in sleeve, and draft helical spring is installed on sleeve outward and by the mounting of mounting round platform, installs very convenient quick and Stability Analysis of Structures reliably, ensure that damping, buffering performance.

Wherein also comprise damping mechanism, described damping mechanism, comprise the tubular damper 6 on the rear axle housing body being arranged at actuating unit two ends respectively and damping spring 7, tubular damper 6 is all connected with rear axle housing body 1 with damping spring 7 lower end, and upper end is connected with vehicle frame.

Like this actuating unit is set directly on rear axle housing body, facilitates Power output transmission.Tubular damper and damping spring are provided separately simultaneously, can adjust easily and flexibly and select applicable tubular damper and damping spring to install, its damping performance and damping capacity are matched with the situation of electric automobile better, ensure that damping and damping, improve vehicle safety.

Wherein, described damping spring 7 is helical spring and is vertically arranged on the rear axle housing body 1 at actuating unit two ends, and described tubular damper 6 is positioned at outside damping spring and upper end and is inclined and mounted on rearwardly and upwardly on vehicle frame.Like this, damping spring is vertically installed, and can ensure the damping effect on vertical direction, ensures that helical spring is stressed along its length simultaneously, increases the service life and avoids losing efficacy.The oblique installation of tubular damper simultaneously can extend its length, and then improves damping.

Wherein, main body of vehicle frame 8 rear portion end positions has one separately and to extend rearwardly and upwardly and for the rear tailstock 9 of installation car shell covering after one's death, there is in the middle part of rear tailstock 9 level be connected and be positioned at the vehicle frame afterbody cross bar 11 directly over rear axle housing body 1, the rear axle housing body upper surface at described actuating unit two ends is provided with a spring mounting seat 12, spring mounting seat 12 comprises a round platform and is positioned at the backstay in the middle part of round platform, described vehicle frame afterbody cross bar is just provided with a spring fitting cylinder 13 to spring mounting seat, described damping spring 7 lower end is socketed and is fixed on the round platform of spring mounting seat 12, upper end is arranged in spring fitting cylinder 13, outside described damping spring 7, the rear axle housing body lower surface of adjacent position has the mounting groove of a fovea superior, be embedded in mounting groove and be welded with a holder 14, holder 14 is the elongated member that arranges along the longitudinal direction and cross section is inverted U-shaped, holder 14 rear and front end extends rear axle housing body front and back sides separately, holder 14 back side top is welded with a damper down journal seat 15, described tubular damper 6 lower end is hinged on damper down journal seat 15, on the damper upper journal seat 16 on upper end thereof tailstock top after being welded on.

Like this, main body of vehicle frame is positioned at chassis position, its rear portion extends back the rear tailstock and the structure such as vehicle frame afterbody cross bar that arrange not only for installation car shell covering after one's death, the installation of the components such as damping spring, tubular damper and balancing pole can also be facilitated to connect, also make vehicle frame overall structure more simply compact.Wherein, the spring mounting seat of truncated cone-shaped that rear axle housing body upper surface is arranged facilitates the installation of damping spring to fix, and damping spring upper end is arranged in the spring fitting cylinder on vehicle frame afterbody cross bar, very efficient and convenient and reliably fixing.The holder that rear axle housing body bottom is arranged, not only facilitates the installation of tubular damper, but also the convenient installation for towing arm connects, and towing arm rear end can be made to form two installation tie points, improves installation reliability.

Wherein, described towing arm 5 entirety is in the vertical long block shape arranged, towing arm 5 front end forward upward tilts and on the towing arm journal stirrup 17 that lower surface is arranged downwards after being hingedly mounted on main body of vehicle frame by a horizontal hinge axis hole, towing arm 5 rear end and upper surface are respectively provided with a horizontal hinge axis hole near back-end location, and being hingedly mounted on position, described holder 14 rear and front end, three horizontal hinge axis holes are triangularly arranged.

Like this, one, towing arm front end mounting points, two, rear end mounting points, three points are triangularly arranged, and can improve the stable connection degree of towing arm and rear axle housing body, and towing arm front end is inclined upwardly setting, can better by the driving force transmission of back axle to vehicle body, ensure drive reliable and stable.

Wherein, described towing arm 5 upper surface is plane, and lower surface is protruding arcwall face, and the side seamed edge of towing arm 5 upper and lower surface has the flange 18 of outwardly convex.

Like this, simple structure can be leaned on to improve towing arm self-strength; Ensure the transmission of power.

Wherein, described towing arm 5 comprises the overall towing arm body for foundry goods, and towing arm body surface has plating antirust coat.Like this, have and be beneficial to manufacture, good integral strength, the advantages such as long service life.

Wherein, described towing arm body is positioned at three horizontal hinge axis hole positions and is provided with three yielding rubber circles 19, the metal cylinder 20 for installing hinge is coaxially arranged with in the middle part of yielding rubber circle 19, the uniform through hole 21 be provided with in the width direction in described yielding rubber circle surface, in the middle part of through hole 21, both sides extend internally to be connected to form and cut off perpendicular to the diametric damping of yielding rubber circle 19.

Like this, yielding rubber circle can improve the damping effect in the transmission dynamic process of towing arm, not only can slow down the shock loading that towing arm self bears, and improves autoprotection effect, and strengthens vehicle body damping effect, improves vehicle riding comfort.The metal cylinder simultaneously arranged; the convenient impulsive force passed over by hinge is delivered evenly to rubber ring; improve rubber ring protected effect; in addition; the structure of partition is set in the middle part of the through hole in yielding rubber circle; radial impact power can be converted into along vertical diameter to power, and then decompose sponge, drastically increase damping effect.

Claims (1)

1. a balancing pole elastic shock attenuation structure, it is characterized in that, comprising lower end is columnar balancing pole epimere, also comprising upper end is columnar balancing pole hypomere, the upper end of balancing pole hypomere and balancing pole epimere lower end coordinate formation can socket join structure in axial sliding, also comprise compression helical spring and a draft helical spring, described compression helical spring abuts in the inner chamber being arranged at balancing pole hypomere and balancing pole epimere vertically, and the mounting of described draft helical spring two ends is fixed on the mounting round platform of balancing pole hypomere and the formation of balancing pole epimere outer surface evagination.