Chute type telescopic vehicle footstep mechanism
Technical field
The utility model relates to a kind of vehicle body mechanical mechanism, especially relates to a kind of chute type telescopic vehicle footstep mechanism.
Background technology
In today of communications high development, increasing vehicle appears in the daily life, and automobile has become the vehicle of main flow; Along with the development of all trades and professions, special vehicle also develops thereupon, and is more and more as the owning amount of vehicles such as engineering truck, medical truck, cross-country car.
Usually when design is packed in the height of car door two side legs pedal, have following contradiction, consider from the human engineering angle, the relative floor level of stretcher usually about 20CM, personnel's most convenient of getting on or off the bus; But consider that from the crossing ability angle of vehicle the setting height(from bottom) of stretcher should be not less than the min. road clearance of vehicle.In order to solve above-mentioned contradiction, patent No. is that 02825000.1 patent of invention has been announced the technical scheme of a kind of " retractable vehicle step ".This scheme is by a four-bar linkage, realizes the purpose of automatically flexible step.But there is following deficiency in this mechanism: because this mechanism is mounted in the vehicle bottom, service conditions is more abominable, thereby other article of the easy cramping of connecting rod mechanism on the go make mechanism's cisco unity malfunction have influence on the safety of vehicle '; The described mechanism of this patent of invention is in order to solve flexible limit orientation problem in addition, customized design two spacing parts, but this spacing part can not be fine solution mechanism stop buffer problem.
Summary of the invention
The utility model mainly is relatively poor at existing in prior technology road crossing ability, the serviceability of mechanism own is relatively poor, limit location lacks the technical matters of buffering, provide a kind of road crossing ability better, the serviceability of mechanism own is better, and the flexible chute type telescopic vehicle footstep mechanism of may command is preferably cushioned in limit location.
The utility model is also relatively poor at the existing in prior technology safety performance, and the technical matters of inconvenience etc. is safeguarded in mechanism cleaning, provides a kind of safety performance better, clear up the chute type telescopic vehicle footstep mechanism that may command easy to maintenance is stretched.
Above-mentioned technical matters of the present utility model is mainly solved by following technical proposals: arc chute is offered in the lower end of described hold-down arm, arc chute divides three sections, interlude is a sliding arc, and two ends are the buffering arc, and the curvature of buffering arc is less than the curvature of sliding arc.The arc chute of hold-down arm swinging end is as the sliding trace of the slide block on the clutch pedal mounting bracket, and the motion of hold-down arm drives clutch pedal mounting bracket and relatively rotating between it; The slide block movement position reflected by size of current, and the existence of buffering arc makes slide block to obtaining buffering before two stop bits up and down, and electric current reflection trend line style is increased, the increase of the point type of avoiding jumping.
As preferably, have spherical concave surface slideway in the described arc chute, arrange steel ball in the spherical concave surface slideway, fit tightly between the steel ball, the outer covering of steel ball stops circle.In chute, offer a slideway, adopt steel ball to cooperate the friction drag that reduces to slide with the rolling of slideway in the slideway.
As preferably, have spherical pit at interval in the described arc chute, in the spherical pit steel ball is set, the outer covering of steel ball stops circle.The spherical pit that is provided with can make steel ball separated from each other at interval, avoids rotating the friction that produces between the steel ball mutually, further reduces friction drag.
As preferably, described slide block is in the arc-shaped, and the arc curvature of arc chute equals the curvature of circular arc slide block, and the width of the arc chute of chute equates with the width of circular arc slide block.The slide block of clutch pedal mounting bracket sliding end becomes circular-arc, and the circular arc curvature of slide block equates that with the circular arc curvature of chute the circular arc slide block just in time is embedded in the arc chute, and slides along arc chute.
As preferably, at the end face of described slide block cylindric convex body is set, cylindric convex body is connected with actuating arm.Clutch pedal mounting bracket is connected with actuating arm, and adapter shaft is set on slide block, and and actuating arm between form and be rotationally connected.
As preferably, described slide block is made up of identical cylindrical piece more than three or three, and the circle center line connecting of each cylindrical piece forms circular arc line, and this circular arc line curvature equates with the arc curvature of chute.The type of slide block can have multiple, can be combined by a plurality of blocks, also can be made of single block, as long as the curvature of curve that each block and the contacted point of slideway are linked to be and the arc curvature of chute equate.
As preferably, described erection support inboard respectively is provided with a hold-down arm, hold-down arm is connected by rotating shaft with erection support, hold-down arm divides connecting portion and support portion up and down, the width of connecting portion is half of support portion width, offer axis hole on the connecting portion, axis hole and erection support form by turning cylinder and are rotationally connected.Axis hole on the hold-down arm connecting portion can be connected with erection support, is subjected to motor drives and freely rotates on erection support, and an erection support and hold-down arm respectively are installed at the two ends of transmission shaft, and is flexible with the stretcher that drives both sides simultaneously synchronously.
As preferably, be provided with concave arc between described connecting portion and the support portion, concave arc and connecting portion smooth transition, the concave arc radius is more than or equal to the turning cylinder radius.Actuating arm when being retracted to the limit and hold-down arm be in same horizontal surface, concave arc position on the actuating arm snaps in hold-down arm and the erection support bonded assembly turning cylinder, the radius of concave arc radius is slightly larger than the turning cylinder radius, to be fit to abundant cooperation between the two, do not produce relative becoming flexible, reach the purpose of compact conformation, reduced volume, and solve the technical matters of stress concentration preferably.
As preferably, described clutch pedal mounting bracket becomes fan-shaped, and its radius destination node place's bending also forms step-like short handle, and pedal is buckled on the step-like short handle of clutch pedal mounting bracket.Clutch pedal mounting bracket is accepted pedal and hold-down arm, and itself is provided with buckle, pedal and clutch pedal mounting bracket clamping along the runner movement on the actuating arm on the step-like short handle of clutch pedal mounting bracket simultaneously.
As preferably, hold-down arm becomes the shaped as frame structure, and two hold-down arms of erection support inboard surround the four sides enclosed construction.Enclosed shaped as frame architecture can prevent falling into of some tiny article, thereby the system that influences normally moves, the service life of bigger raising system architecture.
Therefore, the utlity model has characteristics such as simply the road crossing ability is better, and the serviceability of mechanism own is better, and limit location buffering is better, and safety performance is better, and mechanism's cleaning is easy to maintenance rational in infrastructure.
Description of drawings
Accompanying drawing 1 is a kind of structural representation of the utility model hold-down arm;
Accompanying drawing 2 is a kind of structural representations of the utility model clutch pedal mounting bracket;
Accompanying drawing 3 is a kind of ultimate limit state structural representations of first kind of single-piece of the utility model;
Accompanying drawing 4 is the another kind of ultimate limit state structural representations of first kind of single-piece of the utility model;
Accompanying drawing 5 is another kind of structural representations of the utility model hold-down arm;
Accompanying drawing 6 is another kind of structural representations of the utility model clutch pedal mounting bracket;
Accompanying drawing 7 is a kind of ultimate limit state structural representations of second kind of single-piece of the utility model;
Accompanying drawing 8 is the another kind of ultimate limit state structural representations of second kind of single-piece of the utility model.
The specific embodiment
Below by embodiment, and in conjunction with the accompanying drawings, the technical solution of the utility model is described in further detail.
Embodiment 1: adopt aluminum alloy to make erection support 1 and clutch pedal mounting bracket 8, erection support 1 is the plane quadrilateral shape, clutch pedal mounting bracket 8 is fan-shaped, its radius destination node place's bending also forms step-like short handle 84, on the fan-shaped arc top slide block 82 is set, the curvature of the arc chute 51 on slide block 82 is arcuation and curvature and is arranged on actuating arm equates, a cylindric convex body 83 is set on slide block 82 simultaneously, this cylindric convex body 83 as and actuating arm 4 bonded assembly turning cylinders; On the step-like short handle 84 buckle is set, pedal 9 is buckled on the step-like short handle 84 of clutch pedal mounting bracket, also can be drilled with tapped bore on step-like short handle 84 simultaneously, and pedal 9 can pass through screw (shown in Fig. 2 and 3) fastened to each other with step-like short handle 84.
The manufacturing materials of hold-down arm 5 is identical with clutch pedal mounting bracket 8, appearance is rectangular tabular, hold-down arm 5 divides connecting portion 52 and support portion 53 up and down, the width of connecting portion 52 is half of support portion 53 width, offer an axis hole 54 in the middle part of connecting portion 52, this axis hole 54 forms by turning cylinder with erection support 1 and is connected, and making hold-down arm 5 have with axis hole 54 is the rotating function of center of turn; An arc chute 51 is offered in 53 bottoms in the support portion, and chute 51 is divided into three sections, and interlude is a sliding arc, and two ends are the buffering arc, and the curvature of buffering arc is less than the curvature of sliding arc, and the width of chute 51 and the curvature of sliding arc are equal to the width and the curvature of slide block 82; Be provided with a concave arc 55 between connecting portion 52 and support portion 53, concave arc 55 passes through the rounded corner smooth transition with connecting portion 52, and the radius of concave arc 55 is slightly larger than the radius (as shown in figs. 1 and 3) of actuating arm turning cylinder 41.
During assembling, drive motor and turning cylinder 2 are linked together, in the both sides of turning cylinder 2 erection support 1 is set respectively, an end of actuating arm 4 and the connecting portion 52 of hold-down arm 5 all adopt rotating shaft to be connected the inboard of erection support 1; In the arc chute 51 that circular arc slide block 82 on the clutch pedal mounting bracket 8 embeds on the connecting portion 52, the cylindric convex body 83 on the circular arc slide block 82 is rotationally connected with the other end of actuating arm 4 simultaneously; Pedal 9 snappings or screw are connected on the step-like short handle 84 of clutch pedal mounting bracket 8 (as shown in Figure 3).
During use, electrical motor is just changeing drive turning cylinder 2 and is rotating counterclockwise, and turning cylinder 2 drags actuating arm 4 conter clockwises and lifts, and actuating arm 4 spurs circular arc slide block 82 simultaneously and slides along arc chute 51, hold-down arm 5 also lifts with actuating arm 4 conter clockwises, and pedal 9 is followed 82 motions of circular arc slide block; When circular arc slide block 82 moves to the edge, bottom of arc chute 51, hold-down arm 5 and actuating arm 4 are finished C.C.W. and are lifted, concave arc 55 on the hold-down arm 5 is collided with turning cylinder 2, simultaneously, pedal 9 reaches and parallel position, hold-down arm 5 edges, and so far pedal is finished a contraction process (as shown in Figure 4); The electrical motor counter-rotating drives turning cylinder 2 and clockwise rotates, and turning cylinder 2 drags the actuating arm 4 cw bottoms, and actuating arm 4 spurs circular arc slide block 82 simultaneously and slides along arc chute 51, and hold-down arm 5 lifts with actuating arm 4 cws, and pedal 9 is followed 82 motions of circular arc slide block; When circular arc slide block 82 moved to the edge, top of arc chute 51, hold-down arm 5 and actuating arm 4 were finished clws and are lifted, and simultaneously, till hold-down arm 5 position vertical with horizon, so far pedal is finished a stretching process (as shown in Figure 3).
Embodiment 2: adopt aluminum alloy to make erection support 1 and clutch pedal mounting bracket 8, erection support 1 is the plane quadrilateral shape, clutch pedal mounting bracket 8 is fan-shaped, its radius destination node place's bending also forms step-like short handle 84, on the fan-shaped arc top slide block 82 is set, slide block 82 is made up of three identical cylinders 87, and the circle center line connecting of three cylinders 87 forms a curve, and the curvature of this camber line is identical with the curvature of chute; A cylindric convex body 83 is set, these cylindric convex body 83 conducts and actuating arm 4 bonded assembly turning cylinders simultaneously on three cylinders 87; On the step-like short handle 84 buckle is set, pedal 9 is buckled on the step-like short handle 84 of clutch pedal mounting bracket, also can be drilled with tapped bore on step-like short handle 84 simultaneously, and pedal 9 can pass through screw (shown in Fig. 6 and 7) fastened to each other with step-like short handle 84.
The manufacturing materials of hold-down arm 5 is identical with clutch pedal mounting bracket 8, appearance is rectangular tabular, hold-down arm 5 divides connecting portion 52 and support portion 53 up and down, the width of connecting portion 52 is half of support portion 53 width, offer an axis hole 54 in the middle part of connecting portion 52, this axis hole 54 forms by turning cylinder with erection support 1 and is connected, and making hold-down arm 5 have with axis hole 54 is the rotating function of center of turn; An arc chute 51 is offered in 53 bottoms in the support portion, and chute 51 is divided into three sections, and interlude is a sliding arc, and two ends are the buffering arc, and the curvature of buffering arc is less than the curvature of sliding arc; Recessed road is offered in chute 51 inboards, discharging steel ball 6 in the recessed road; Or offer spherical pit at interval in chute 51 inboards, in spherical pit, lay steel ball 6; Covering stops circle 7 outside steel ball 6, exposes the top spherical crown part and cylinder 87 rolling touch of steel ball 6, and the width of chute 51 and the curvature of sliding arc are equal to the diameter and the line of centres curvature of cylinder 87; Be provided with a concave arc 55 between connecting portion 52 and support portion 53, concave arc 55 passes through the rounded corner smooth transition with connecting portion 52, and the radius of concave arc 55 is slightly larger than the radius (shown in Fig. 5 and 7) of actuating arm turning cylinder 41
During assembling, drive motor and turning cylinder 2 are linked together, in the both sides of turning cylinder 2 erection support 1 is set respectively, an end of actuating arm 4 and the connecting portion 52 of hold-down arm 5 all adopt rotating shaft to be connected the inboard of erection support 1; In the arc chute 51 that cylinder 87 on the clutch pedal mounting bracket 8 embeds on the connecting portion 52, the cylindric convex body 83 on the cylinder 87 is rotationally connected with the other end of actuating arm 4 simultaneously; Pedal 9 snappings or screw are connected on the step-like short handle 84 of clutch pedal mounting bracket 8 (as shown in Figure 7)
During use, electrical motor is just changeing drive turning cylinder 2 and is rotating counterclockwise, and turning cylinder 2 drags actuating arm 4 conter clockwises and lifts, and actuating arm 4 spurs cylinder 87 simultaneously and slides along arc chute 51, hold-down arm 5 also lifts with actuating arm 4 conter clockwises, and pedal 9 is followed cylinder 87 motions; When cylinder 87 moves to the edge, bottom of arc chute 51, hold-down arm 5 and actuating arm 4 are finished C.C.W. and are lifted, concave arc 55 on the hold-down arm 5 is collided with turning cylinder 2, simultaneously, pedal 9 reaches and parallel position, hold-down arm 5 edges, and so far pedal is finished a contraction process (as shown in Figure 8); The electrical motor counter-rotating drives turning cylinder 2 and clockwise rotates, and turning cylinder 2 drags the actuating arm 4 cw bottoms, and actuating arm 4 spurs cylinder 87 simultaneously and slides along arc chute 51, and hold-down arm 5 lifts with actuating arm 4 cws, and pedal 9 is followed cylinder 87 motions; When cylinder 87 moved to the edge, top of arc chute 51, hold-down arm 5 and actuating arm 4 were finished clws and are lifted, and simultaneously, till hold-down arm 5 position vertical with horizon, so far pedal is finished a stretching process (as shown in Figure 7).