CN209010008U - A kind of vehicle body lifting appliance that can voluntarily open and close - Google Patents

Abstract

The utility model discloses the vehicle body lifting appliances that one kind can be opened and closed voluntarily, the fixation bracket that can be connect with lifting appliance including top, it is hinged on fixed bracket and can hook the left boom of vehicle body, right boom and left boom can be driven, the open-and-close mechanism of right boom folding, the open-and-close mechanism include setting ground and with left boom, the corresponding limit guide rail of right boom, the limit guide rail has the limit sliding chutes of upper end opening, opposite side is equipped with the lateral openings of perforation limit sliding chutes lower end in two limit guide rails, the left boom, the lower end of right boom is respectively equipped with the limited roller that can import limit sliding chutes upper end opening.The utility model structure simple action is reliable, is not influenced by oil circuit, gas circuit or circuit, thus applicable different use occasion.

Description

A kind of vehicle body lifting appliance that can voluntarily open and close

Technical field

The utility model relates to a kind of automobile manufacture auxiliary lifting appliances, more particularly, to a kind of suitable for lifting white body Suspender.

Background technique

In automobile manufacturing process, it is often necessary to lift body of a motor car, in the prior art, lifting vehicle body is usually to pass through one What a suspender for connecting with lifting appliance was realized, suspender generally comprises the fixed part connecting with lifting appliance, relatively turnable The open-and-close mechanism of the drivings such as electronic, hydraulic is arranged in left and right boom, the hook being arranged on boom between the boom of left and right.When hanging When tool decline, open-and-close mechanism opens left and right boom, and when suspender is fallen into place, left and right boom closes up, to make to link up with hooking The firmly bottom of body side wall, then suspender drives vehicle body to move up the lifting that vehicle body can be realized.

For example, disclosed " a kind of swing driving mechanism for vehicle body lifting appliance boom ", bulletin in Chinese patent literature Number be CN205472346U, including rack, the motor being arranged on the rack, driving gear group and driven gear group, driving gear Two driving gears in group are closed with two driven tooth rotation browsings in driven gear group respectively, and the output shaft of motor passes through a company Linkage drives the spindle rotation of two driving gears, and the driven shaft of two driven gears connect with a drive rod, drive rod it is another One end is equipped with sliding block, and sliding block is embedded in the bar shaped caulking groove of oscillating rod side setting, one end of oscillating rod hingedly on the rack, The other end is equipped with the connecting plate connecting for the boom with vehicle body lifting appliance, and drive rod makes sliding block in oscillating rod with the rotation of driven shaft Bar shaped caulking groove in reciprocatingly slide, thus drive oscillating rod be equipped with one end of connecting plate around its other end hinge joint toward physical pendulum It is dynamic.The program can drive boom to do opening and closing movement, and can be avoided boom and open and make automatically during lifting Vehicle body is fallen.

However the above-mentioned vehicle body lifting appliance using the driving open-and-close mechanism such as electronic, hydraulic has following defects that firstly, it is opened and closed Structure is complicated for mechanism, manufacturing cost is high, thus is easy to be out of order in use, and its is difficult in maintenance；Secondly, suspender It needs to connect with oil pipe, tracheae, cable etc., therefore, the scope of application and applicable situation are severely limited, and oil pipe, Tracheae, cable etc. are easy to interfere lifting process.In particular, needing after vehicle body lifting through walking mechanism transverse shifting When more remote, too long oil pipe, tracheae, cable will cause serious interference, and the gathering of oil pipe, tracheae, cable is difficult.

Utility model content

Purpose of the utility model is to solve the existing bodies of a motor car using the driving open-and-close mechanism such as electronic, hydraulic Structure is complicated present in suspender, at high cost, easy break-down, and the scope of application and the restricted problem of applicable situation, provides A kind of vehicle body lifting appliance that can voluntarily open and close, structure simple action is reliable, is not influenced by oil circuit, gas circuit or circuit, so as to It is applicable in different use occasions.

To achieve the goals above, the utility model uses following technical scheme:

A kind of vehicle body lifting appliance that can voluntarily open and close, the fixation bracket that can be connect with lifting appliance including top are hinged on admittedly On fixed rack and the left boom of vehicle body, right boom and the open-and-close mechanism that left boom, the folding of right boom can be driven can be hooked, it is special Sign is that the open-and-close mechanism includes two limit guide rails that ground is arranged in and can open left and right boom, two limit guide rails point Not Ju You upper end opening limit sliding chutes, the limit sliding chutes of two limit guide rails are corresponding with left boom, right boom respectively, two Opposite side is equipped with the lateral openings of perforation limit sliding chutes lower end, the lower end of the left boom, right boom in limit guide rail It is respectively equipped with the limited roller that can import limit sliding chutes upper end opening.

For the utility model when needing to lift by crane vehicle body, lifting appliance synchronizes down fixed bracket together with left boom, right boom It moves；When limited roller enters in the limit sliding chutes upper end opening of limit guide rail, limit sliding chutes can be such that limited roller is moving down While generate movement in the lateral direction, so that left boom, right boom be made to open outward and cross body side wall；When a left side is hung When arm, right boom are moved down in place, limited roller is skidded off from the lateral openings of limit sliding chutes lower end, to make left boom, right boom Close up and catch on the downside of body side wall inwardly, lifting appliance synchronizes fixed bracket together with left boom, right boom at this time It moves, so that vehicle body be sling.That is, the utility model is when lifting vehicle body, it is dynamic without hydraulic, air pressure or electric power etc. On the one hand power can save corresponding transmission mechanism, simplify structure, be easy to use in later maintenance, on the other hand can not be by The influence of oil circuit, gas circuit or circuit, so as to be suitable for different use occasions.

Preferably, the support bracket fastened front and rear sides middle position is respectively equipped with articulated shaft, the left boom includes The strut being respectively hinged on the articulated shaft of front and rear sides, the right boom includes being respectively hinged on the articulated shaft of front and rear sides Strut, the strut being hinged on the articulated shaft of the same side on left boom, right boom is oppositely arranged, and is rolled downwards from the inside to the outside Tiltedly, it is connected separately with reinforcement cross bar between two struts of left boom and between two struts of right boom, in strut Outer end is respectively equipped with sunpender straight down, and the lower end of each sunpender is respectively equipped with adjustable hook.

Reinforcing cross bar is separately connected two struts of left boom and two struts of right boom integrally, thus favorably In the intensity of the left boom of raising, right boom, and make sunpender that can keep synchronization action.Strut, which is obliquely installed, to be conducive to improve and hang The bonding strength of bar, colleague keep left boom, right boom separated as far as possible, convenient for hooking at left and right sides of vehicle body.And adjustable hook It is then the lifting that the utility model adapts to different automobile types.

Preferably, the adjustable hook includes the lateral casing for being fixed in downrod lower end, is plugged in lateral casing Adjusting rod, on the upside of the inner end of adjusting rod be equipped with flexible vehicle body tray, lateral casing be equipped with lock-screw, locking Screw protrudes into the mortgage adjusting rod of the tail end in lateral casing.

Be plugged on adjusting rod in lateral casing can transverse shifting can when we need to lift the vehicle body of different automobile types Lock-screw is first unclamped, adjusting rod is then laterally moved, makes vehicle body tray that can hook the downside of body side wall.Then lock is tightened Tight screw, can secured adjusted bar.When vehicle body is lifted, it is resisted against on the downside of vehicle body or so side wall on vehicle body tray, thus Ensure the safety and reliability lifted, avoids the scuffing of vehicle body.

Preferably, the top of the limit guide rail is equipped with the guide plate with the smooth connection of limit sliding chutes upper end opening, institute The smooth connection of the inner sidewall of the lower end and limit sliding chutes of stating guide plate, the upper end of guide plate tilt inwardly, the limited roller The lower end of sunpender is set, is equipped with elastic support structure between strut and fixed bracket, when fixed bracket moves down, limit rolling Wheel rolls along the upper surface of guide plate and enters in limit sliding chutes, and left boom, right boom are separated from each other；When limited roller reaches When limit sliding chutes lower end, limited roller is skidded off from lateral openings；When fixed bracket moves up, left boom, right boom hang vehicle body It rises；When limited roller contacts guide plate lower surface, limited roller makes left boom, right boom inwardly under the action of guide plate It swings；At the end of lifting vehicle body, elastic support structure resets the outside side oscillation of left boom, right boom.

Since the upper end of guide plate tilts inwardly, when lifting appliance makes fixed bracket together with left boom, right boom It synchronizes when moving down, just with face contact on the upside of inclined guide plate, inclined guide plate works limited roller at this time, makes to limit Idler wheel moves outward while moving down, so that left boom, right boom be made to laterally rotate and sufficiently open；Work as limited roller When into in the limit sliding chutes of the smooth connection of guide plate, left boom, the right boom opened outward is crossed on the outside of body side wall； When left boom, right boom move down in place, limit sliding chutes are pushed limited roller and are skidded off from the lateral openings of limit sliding chutes lower end, this When lifting appliance fixed bracket is synchronized together with left boom, right boom move up and sling vehicle body；It is connect when being moved on limited roller When touching the downside of guide plate, guide plate pushes limited roller inwardly, to make left boom, right boom that resilient support be overcome to tie The spring force of structure relatively rotates, it is ensured that the reliable hooking of vehicle body；At the end of lifting vehicle body, the elasticity with slow reset function Support construction resets the outside side oscillation of left boom, right boom, in order to subsequent lifting.

Preferably, the elastic support structure includes the buffer mounting bracket being arranged on fixed bracket, it is described slow It rushes device mounting bracket and is equipped with installation through-hole, cylindrical buffer is inserted in installation through-hole, the shell of buffer is equipped with Two adjusting nuts, two adjusting nuts compress the two sides of buffer mounting bracket respectively, and the buffer head of the buffer supports By the downside of corresponding strut.

It is compared with general spring, the buffer of fluid pressure type has the characteristics that reset slowly, therefore moves to when on limited roller When contacting the downside of guide plate, guide plate pushes limited roller inwardly, so that left boom, right boom be made to overcome resilient support The spring force of structure relatively rotates, and when limited roller is moved up and is detached from the downside of guide plate, left boom, right boom are not Can rapidly outside distending and reset, thus can steadily hooking vehicle body, avoid because left boom, right boom Rapid reset caused by Impact to vehicle body.In particular, position of two adjusting nuts convenient for adjusting buffer on fixed bracket, and then an adjustable left side The open configuration of boom, right boom adapts to the vehicle body of different in width.

Preferably, the open-and-close mechanism further includes the fixing seat of connection on the ground, the lower end hinge of the limit guide rail It connects in fixing seat, reset spring is equipped between fixing seat and limit guide rail.

Due to being equipped with reset spring between fixing seat and limit guide rail, limit guide rail can be rotated flexibly, be avoided There is stuck phenomenon between left boom, right boom and limit guide rail.

Preferably, the fixing seat includes the fixed plate being fixedly connected with the ground, can control to slide laterally and be connected to fixed plate On sliding block, can front and back longitudinal sliding motion be connected to the top shoe on sliding block, the lower end of the limit guide rail is hinged on cunning The inside of block, the outside of top shoe are equipped with inclined baffle, and baffle is equipped with limit perforation, the limit sliding chutes lower end and lateral Opposite inside portion be open in the arc bent inwardly, limit guide rail has a supporting oblique surface opposite with baffle, propping up Cant is equipped with the guide and limit bar that limit perforation is extended across to baffle side, and guide and limit bar passes through limit perforation End is equipped with stop nut, is arranged with reset spring on guide and limit bar, the both ends of reset spring compress respectively supporting oblique surface and Baffle.

By the moving left and right of sliding block, the back-and-forth motion of top shoe, we are convenient to the position of adjustment limit guide rail, So that it is guaranteed that corresponding with left boom, right boom.In particular, guide and limit bar can limit between supporting oblique surface and baffle away from From, and the guiding and positioning function to reset spring can be played, and reset spring then makes limit guide rail flexibly positioned.

Therefore, the utility model has the following beneficial effects: structure simple action is reliable, not by oil circuit, gas circuit or circuit Influence, thus applicable different use occasion.

Detailed description of the invention

Fig. 1 is a kind of structural schematic diagram of the utility model.

Fig. 2 is strut and support bracket fastened articulated structure schematic diagram.

Fig. 3 is the mounting structure schematic diagram of buffer.

Fig. 4 is the mounting structure schematic diagram of limit guide rail.

In figure: 1, fixed bracket 11, lifting chain connecting plate 12, articulated shaft 121, locating groove 13, detent Piece 14, installation through-hole 2, left boom 21, strut 211, graphite gasket 22, is reinforced buffer mounting bracket 141 Cross bar 23, sunpender 24, limited roller 3, right boom 4, limit guide rail 41, limit sliding chutes 42, lateral openings 43, guide plate 44, supporting oblique surface 45, guide and limit bar 46, stop nut 47, reset spring 5, lateral casing 51, adjusting rod 52, vehicle body tray 53, lock-screw 6, buffer 61, adjusting nut 7, fixed plate 71, downslide Block 72, top shoe 73, baffle 731, limit perforation.

Specific embodiment

The utility model is further described with specific embodiment with reference to the accompanying drawing.

As shown in Figure 1, a kind of vehicle body lifting appliance that can voluntarily open and close, including fixed bracket 1, it is hinged on fixed bracket and can The left boom 2, right boom 3 and the open-and-close mechanism that left boom, the folding of right boom can be driven of vehicle body are hooked, fixed bracket is one Several lifting chain connecting plates 11 are arranged in support bracket fastened upper surface in horizontally disposed rectangular frame, so as to lifting appliance It is connected.Support bracket fastened front and rear sides middle position is respectively set articulated shaft 12, left boom, the substantially symmetrical shape of right boom, Specifically, left boom includes two struts 21, and one end of two struts is respectively hinged at the articulated shaft of fixed bracket front and rear sides On, right boom equally includes two struts, and one end of two struts is respectively hinged on the articulated shaft of fixed bracket front and rear sides, The strut being hinged on the articulated shaft of the same side on left boom, right boom is oppositely arranged, and is rolled tiltedly downwards from the inside to the outside, thus Make the left boom being hinged on the articulated shaft of fixed bracket the same side, the strut of right boom in splayed.In addition, as shown in Fig. 2, Graphite gasket 211 can be arranged in we between strut and articulated shaft, in order to which it realizes self-lubricating, while having corrosion-resistant, no Aging, the advantages that capable of using steadily in the long term.A locating groove 121 can be also arranged in we on the end periphery of articulated shaft, The bottom surface of locating groove is plane, and correspondingly, in fixed bracket screwing connection card bit slice 13, the detent piece detent is in articulated shaft Locating groove in, thus can avoid articulated shaft rotation.

In addition, before and after the left boom between two struts and between the strut of front and back two of right boom respectively one plus Tyrannical bar 22 is conducive to improve to be separately connected two struts and two struts of right boom of left boom integrally The intensity of left boom, right boom, and make the strut of front and back two that can keep synchronization action.In addition, in the outer end in every strut Sunpender 23 straight down is respectively set, adjustable hook is then respectively set in the lower end of each sunpender.

It should be noted that the direction in the present embodiment is on the basis of the direction for lifting vehicle body, that is to say, that vehicle body Left and right directions be support bracket fastened left and right directions, the longitudinal direction of vehicle body is support bracket fastened front-rear direction, and lifts vehicle body When, left boom, right boom be located at vehicle body in right two sides.And the region between left boom, right boom is defined as interior Side will be defined as outside on the right side of the left side of left boom, right boom.

The open-and-close mechanism of the utility model includes two limit guide rails 4 for being fixedly provided in ground, two limit guide rails Symmetrical arrangement, and two limit guide rails are corresponding with the sunpender of front side or rear side in left boom, right boom respectively, limit Position guide rail has the limit sliding chutes 41 of upper end opening, opposite side setting perforation limit sliding chutes lower end in two limit guide rails Lateral openings 42, left boom corresponding with limit guide rail, sunpender in right boom lower end be respectively set and can import limit sliding chutes The limited roller 24 of upper end opening.

When needing to lift by crane vehicle body, lifting appliance makes fixed bracket synchronize and move down together with left boom, right boom；When limit is rolled When wheel is entered in the limit sliding chutes upper end opening of limit guide rail, limit sliding chutes play a guiding role to limited roller, thus Limited roller is set to generate movement in the lateral direction while moving down, in this way, left boom, right boom can open outward simultaneously Body side wall is crossed, the adjustable hook of downrod lower end is avoided to collide with old, vehicle body；When left boom, right boom move down into When position, limited roller is skidded off from the lateral openings of limit sliding chutes lower end, so that left boom, right boom be made to close up and catch on inwardly The downside of body side wall, lifting appliance makes fixed bracket synchronize and move up together with left boom, right boom at this time, so that vehicle body be hung It rises.

Demand is lifted in order to adapt to the vehicle body of different automobile types, adjustable hook includes the lateral casing for being fixed in downrod lower end 5, the adjusting rod 51 being plugged in lateral casing, is arranged vehicle body tray 52 on the upside of the inner end of adjusting rod, and vehicle body tray can be used Polyurethane or excellent power glue are made, to have good snubber elastomeric.In addition, settable lock-screw 53 on lateral casing, lock Tight screw protrudes into the mortgage adjusting rod of the tail end in lateral casing, thus by adjusting rod locking.When we need to lift different automobile types Vehicle body when, can first unclamp lock-screw, then laterally move adjusting rod, hook vehicle body tray can under body side wall Side.Then lock-screw is tightened, it can secured adjusted bar.When vehicle body is lifted, the downside of vehicle body or so side wall is against vehicle body Tray is scratched to avoid vehicle body.

Further, we can be arranged and the arc of the smooth connection of limit sliding chutes upper end opening on the top of limit guide rail Guide plate 43, the lower end of guide plate and the smooth connection of side wall on the inside of limit sliding chutes, the upper end of guide plate then curved bend inwardly Song inclination, while an elastic support structure is set between strut and fixed bracket, so that left boom, right boom is kept for basic The state opened.In this way, limited roller first contacts guide plate upper surface, and along the upper table of guide plate when fixed bracket moves down Face is rolled into limit sliding chutes, and left boom, right boom are separated from each other open-shaped state at this time, to avoid left boom, right boom The adjustable hook of lower end touches body of a motor car；When limited roller reaches limit sliding chutes lower end, limited roller is from lateral openings It skids off, left boom, right boom restore the state opened substantially, and adjustable hook at this time enters the downside of body side wall；When solid When fixed rack moves up, left boom, right boom can sling vehicle body；When limited roller contacts guide plate lower surface, limit rolling Wheel makes left boom, the inside side oscillation of right boom under the action of guide plate, so that further hooking lives vehicle body；When lifting vehicle body knot Shu Shi, elastic support structure reset the outside side oscillation of left boom, right boom.

Preferably, as shown in figure 3, the elastic support structure of the utility model includes the buffer being arranged on fixed bracket Installation through-hole 141 is arranged in buffer mounting bracket, cylindrical buffer 6 is inserted in installation through-hole, delays for mounting bracket 14 Rushing device can be used the buffer of fluid pressure type, since hydraulic draft gear is the prior art, not do excessive description herein.Buffer Shell on two adjusting nuts 61 are set, two adjusting nuts compress the two sides of buffer mounting bracket, buffer respectively Buffer head against the downside of corresponding strut.The buffer of fluid pressure type has the characteristics that reset slowly, when on limited roller When moving to the downside of contact guide plate, guide plate pushes limited roller inwardly, so that left boom, right boom be made to overcome buffering The damping action of device relatively rotates, and when limited roller is moved up and is detached from the downside of guide plate, left boom, right boom are not Understand rapidly outside distending and resets；At the end of lifting vehicle body, extruding force suffered by buffer disappears, and buffer head at this time can Strut is slowly pushed, left boom, right boom is made to restore reset condition.Two adjusting nuts are fixing branch convenient for adjusting buffer Position on frame, and then the open configuration of left boom, right boom is adjusted, adapt to the vehicle body of different in width.

Finally, open-and-close mechanism may also include the fixing seat of connection on the ground, specifically, as shown in figure 4, fixing seat includes The fixed plate 7 that is fixedly connected with the ground, the sliding block 71 being slidably connected in fixed plate, the top shoe being slidably connected on sliding block 72, wherein sliding block can in fixed plate left and right slide laterally, and top shoe then can on sliding block front and back longitudinal sliding motion, limit The lower end of guide rail is hinged on the inside of top shoe, so that the position of adjustment limit guide rail is convenient to, to ensure and left boom, the right side Boom is corresponding.Certainly, it would be desirable to lock be respectively set between sliding block and fixed plate and between top shoe and sliding block Locking mechanism.Acclivitous baffle 73 is arranged in the outside of top shoe, setting limit perforation 731 on baffle, limit sliding chutes lower end with The opposite inside portion of lateral openings is in the arc that bends inwardly, so as to make limited roller can out of limit sliding chutes smooth ground roll Lateral openings out.Limit guide rail bottom has a supporting oblique surface 44 opposite with baffle, is arranged on supporting oblique surface to baffle Side extends across the guide and limit bar 45 of limit perforation, and stop nut is arranged in the end that guide and limit bar passes through limit perforation 46, so as to limit the rotational angle of limit guide rail, while a reset spring 47, reset spring are arranged on guide and limit bar Both ends compress supporting oblique surface and baffle respectively, so that limit guide rail be made to be resiliently positioned in vertical state.Due in fixing seat Reset spring is equipped between limit guide rail, therefore, limit guide rail can be rotated flexibly.In this way, when fixing, bracket is moved up, a left side is hung When arm, right boom sling vehicle body and limited roller contacts the downside of guide plate, generated between guide plate and limited roller Opposite active force, so that limit guide rail be made to laterally rotate；When limited roller and guide plate disengage, limit guide rail resets, To can avoid left boom, right boom hoisting process rotation.It is understood that the damping of buffer should be greater than resetting bullet The elastic force of spring, to can ensure that limit guide rail laterally rotates, and a left side is hung at the downside of limited roller contact guide plate Arm, right boom can then remain stationary.

Claims (7)

1. the vehicle body lifting appliance that one kind can be opened and closed voluntarily, the fixation bracket (1) that can be connect with lifting appliance including top are hinged on admittedly On fixed rack and the left boom (2) of vehicle body, right boom (3) and the opening-closing machine that left boom, the folding of right boom can be driven can be hooked Structure, characterized in that the open-and-close mechanism includes that ground is arranged in and can open two limit guide rails (4) of left and right boom, and two Limit guide rail is respectively provided with the limit sliding chutes (41) of upper end opening, the limit sliding chutes of two limit guide rails respectively with left boom, the right side Boom is corresponding, and opposite side is equipped with the lateral openings (42) of perforation limit sliding chutes lower end in two limit guide rails, described Left boom, right boom lower end be respectively equipped with the limited roller (24) that can import limit sliding chutes upper end opening.

2. the vehicle body lifting appliance that one kind according to claim 1 can be opened and closed voluntarily, characterized in that the support bracket fastened front and back Two sides middle position is respectively equipped with articulated shaft (12), and the left boom includes the support being respectively hinged on the articulated shaft of front and rear sides Bar (21), the right boom include the strut being respectively hinged on the articulated shaft of front and rear sides, are hinged on left boom, right boom Strut on the articulated shaft of the same side is oppositely arranged, and from the inside to the outside downwards roll tiltedly, between two struts of left boom and It is connected separately between two struts of right boom and reinforces cross bar (22), be respectively equipped with sunpender straight down in the outer end of strut (23), the lower end of each sunpender is respectively equipped with adjustable hook.

3. the vehicle body lifting appliance that one kind according to claim 2 can be opened and closed voluntarily, characterized in that the adjustable hook includes The lateral casing (5) for being fixed in downrod lower end, the adjusting rod (51) being plugged in lateral casing, set on the upside of the inner end of adjusting rod There is flexible vehicle body tray (52), lateral casing is equipped with lock-screw (53), and lock-screw protrudes into lateral casing Tail end mortgages adjusting rod.

4. the vehicle body lifting appliance that one kind according to claim 2 can be opened and closed voluntarily, characterized in that the top of the limit guide rail Equipped with the guide plate (43) with the smooth connection of limit sliding chutes upper end opening, the lower end of the guide plate and the inner sidewall of limit sliding chutes The upper end of smooth connection, guide plate tilts inwardly, and the lower end of sunpender is arranged in the limited roller, in strut and fixed bracket Between be equipped with elastic support structure, when fixed bracket moves down, limited roller rolls along the upper surface of guide plate and enters limit In the sliding slot of position, left boom, right boom are separated from each other；When limited roller reaches limit sliding chutes lower end, limited roller is from side to opening Mouth skids off；When fixed bracket moves up, left boom, right boom sling vehicle body；When limited roller contacts guide plate lower surface, Limited roller makes left boom, the inside side oscillation of right boom under the action of guide plate；At the end of lifting vehicle body, resilient support knot Structure resets the outside side oscillation of left boom, right boom.

5. the vehicle body lifting appliance that one kind according to claim 4 can be opened and closed voluntarily, characterized in that the elastic support structure packet The buffer mounting bracket (14) being arranged on fixed bracket is included, the buffer mounting bracket is equipped with installation through-hole (141), Cylindrical buffer (6) is inserted in installation through-hole, the shell of buffer is equipped with two adjusting nuts (61), two adjustings Nut compresses the two sides of buffer mounting bracket respectively, and the buffer head of the buffer is under corresponding strut Side.

6. the vehicle body lifting appliance that one kind according to claim 1 can be opened and closed voluntarily, characterized in that the open-and-close mechanism further includes The fixing seat of connection on the ground, the lower end of the limit guide rail is hinged in fixing seat, between fixing seat and limit guide rail Equipped with reset spring (47).

7. the vehicle body lifting appliance that one kind according to claim 6 can be opened and closed voluntarily, characterized in that the fixing seat includes and ground The affixed fixed plate in face (7), can control slide laterally the sliding block (71) being connected in fixed plate, can front and back longitudinal sliding motion connection Top shoe (72) on sliding block, the lower end of the limit guide rail are hinged on the inside of top shoe, and the outside of top shoe is equipped with Inclined baffle (73), baffle are equipped with limit perforation (731), the limit sliding chutes lower end inside portion opposite with lateral openings In the arc bent inwardly, limit guide rail has a supporting oblique surface (44) opposite with baffle, is equipped on supporting oblique surface The guide and limit bar (45) of limit perforation is extended across to baffle side, the end that guide and limit bar passes through limit perforation is equipped with Stop nut (46) is arranged with reset spring (47) on guide and limit bar, the both ends of reset spring compress respectively supporting oblique surface and Baffle.