JP6656116B2 - Vehicle maintenance lift - Google Patents

Description

  The present invention is suitable for, for example, a maintenance lift for a large vehicle, the vehicle receiving pedestal is configured to be small or flat and robust, corresponding to a reduction in the height of the vehicle to be tested and a reduction in the jack-up point, The present invention relates to a vehicle maintenance lift capable of safely lifting up a vehicle to perform maintenance inspection and easily manufacturing the same.

  For example, when performing maintenance and inspection of a large vehicle such as a bus or a truck, a pit is provided on the work floor, a ram is provided in the pit so as to be able to go up and down via a cylinder, and a mounting frame serving as a vehicle receiving stand is provided at the upper end of the ram. A box-shaped attachment base is attached to the installation frame, a pair of support frames, which are attachments, are movably disposed on the attachment base, and the loading portion of the vehicle to be tested is placed on the upper end of the support frame to be tested. 2. Description of the Related Art A vehicle maintenance lift that lifts a vehicle from a work floor and works is used (for example, see Patent Literature 1).

  However, the support frame is generally heavy, and its position adjustment is cumbersome and complicated. In particular, when re-adjusting the position of the support frame after loading the vehicle to be inspected, the worker may have to dive under the vehicle to be inspected. Because of the work, the work is extremely complicated, and its improvement has been desired.

  In response to such a request, a pit is provided on the work floor, and one or more lifting mechanisms having a lifting column and a vehicle cradle are provided in the pit, and one of the mechanisms is disposed at a fixed position of the pit, Along with the other elevating mechanism movably provided, a substrate is disposed on the upper end of the elevating mechanism, a U-shaped cross-section guide is disposed on the substrate, and a pair of sliders is slidably provided on the guide. A box-shaped vehicle pedestal is fixed to the outside of each slider, and an attachment mounting portion on which an attachment is detachable is provided outside the vehicle pedestal, while a pair of cylinder cases are symmetrically arranged between the sliders, The piston rod is pivotally attached to the corresponding cylinder case, the piston rod is extended and retracted, and the slider is moved to adjust the position of the attachment remotely. There is buried type lift vehicle maintenance (e.g., see Patent Document 2).

However, this vehicle maintenance buried type lift has a cylinder case disposed directly above a slider, a box-shaped vehicle pedestal fixed outside the slider, and an attachment mounting portion provided outside the vehicle pedestal. As a result, the height from the board to the attachment increases, and when not in use, the attachment mounting part approaches the work floor, and there is a risk that the vehicle cradle may come into contact with the lower part of the test vehicle before exiting the pit. Was.
Therefore, it is difficult to adjust the distance between the pair of sliders due to the recent lowering of the height of the test vehicle and the lowering of the support position when the vehicle is jacked up. There is a problem that it is difficult to support the test vehicle at the position, and it is not possible to ensure the safety of work.

In addition, the buried type lift for vehicle maintenance has a structure in which the bottom plate on which the vehicle cradle is installed is slidably disposed on the guide, so that the structural strength is generally weak, and the bending moment accompanying the support of the vehicle to be inspected is sufficient. There was a problem that I could not bear it.
Further, if the distance between the pair of attachments is arranged in accordance with the loading position of the vehicle to be inspected, a cylinder case is exposed between the pair of sliders, and washing water of the working floor surface is applied to the cylinder case, and the cylinder case is exposed. There were problems such as the case becoming rusted, reduced function, and easy failure.

JP-A-63-139294 Utility Model Registration No. 2507116

  The present invention solves such a problem, and is suitable for, for example, a maintenance lift for a large vehicle.The vehicle cradle is configured to be small or flat and robust, and the height of the vehicle to be inspected is lowered and the jack-up point is reduced. An object of the present invention is to provide a vehicle maintenance lift capable of safely lifting up a vehicle and performing maintenance inspection in response to a reduction in the position, and easily manufacturing the vehicle.

The invention according to claim 1 has a vehicle pedestal mounted on the upper end of a lifting column and accommodated in a pit so as to be able to protrude and retract, and the vehicle pedestal is a pair of fluid pressure cylinders symmetrically arranged inside. When a pair of support arms disposed operably to different directions from each other through the actuation of the fluid pressure cylinder, the vehicle maintenance lift provided with a support arm moving space and the cylinder disposed on the inner side of the vehicle cradle place the space above and below, the support arm is movably disposed on the upper side of the support arm moving in the space, arranged a pair of hydraulic cylinders directly below the support arms moving space, these space - and the support arm to the scan Hydraulic cylinders are arranged reasonably and compactly to make the vehicle pedestal flat and small or compact, and to reduce the height of the vehicle recently and reduce the jack-up point. Together it may correspond to置化, and simplify the structure.

According to the second aspect of the present invention, a mounting plate is arranged and closed over the entire area on the upper side of the opening side of the vehicle pedestal, the cross section of the vehicle pedestal is formed in a hollow substantially box shape, and the section modulus of the vehicle pedestal is increased. with robust configured by a supporting lifting arm firmly supported, in correspondence with the bending moment applied to the support arm when supporting a test vehicle to allow servicing to securely lifted vehicle, The mounting plate protects the inside of the vehicle cradle, prevents water such as wash water from entering, and prevents rust and deterioration of functions of internal components.
According to a third aspect of the present invention , cutouts are formed at both ends of the erection plate, and the cutouts accommodate an attachment mounting portion provided at the distal end of the support arm so as to be engageable. The space occupied at the time is made compact and the mechanism is simplified .

According to a fourth aspect of the present invention, semicircular peripheral surfaces on both sides of the support arm are slidably disposed inside the both sides of the vehicle cradle so that the support arm can move smoothly and stably. I have.
The invention of claim 5, the cylinder installation space, and a cylinder base for installing the pair of hydraulic cylinders, arranged by polymerizing a base sheet for supporting the cylinder base, the notch in the corresponding position of the cylinder base and the base sheet a groove, so as to face these notched grooves are arranged a pair of hydraulic cylinders, as well as arranged reasonably spaced pair of fluid pressure cylinders, notched grooves a guide tube that connects to the hydraulic cylinder , So that the piping can be neatly and compactly arranged.

The invention of claim 6, the connection end of the guide tube that passes with the fluid pressure device of the hydraulic cylinder, arranged to protrude outside below the vehicle cradle, connected to the guide pipe you pipe into the lifting column Can be performed easily and with good workability.
The invention of claim 7, the coupling portion and the stopper over the bottom of the support arm projecting downwards, connecting the distal end of the piston rod of the body pressure cylinder flow to the connecting portion, provided with the stopper in the cradle vehicle and contactable to place the engaging projections, by restricting the movement range of the support arm, so that to achieve stable movement and safe operation with the support arm.

The invention of claim 1 arranges the supporting arm moving space and the cylinder installation space on the inner side of the vehicle cradle vertically, the support arm is movably disposed on the upper side of the support arm moving in the space, the support arms moving space A pair of fluid pressure cylinders are arranged directly under the space, so the support arm and the fluid pressure cylinders are rationally and compactly arranged in these spaces, and the flat and small or compact vehicle pedestal is planned. The vehicle height and the jack-up point at the time can be reduced, and the structure can be simplified .

According to a second aspect of the invention, closed by placing the bridging plate on the entire vehicle cradle opening side upper, because the formation of the vehicle cradle cross section substantially box shape of the hollow, the vehicle cradle section modulus and greatly robust construction, the supporting lifting arm firmly supported, in correspondence with the bending moment applied to the support arm when supporting a test vehicle to allow servicing to securely lifted vehicle with In addition, the inside of the vehicle cradle can be protected by the erection plate, water such as washing water can be prevented from entering, and generation of rust and deterioration of functions of internal components can be prevented.
According to the third aspect of the present invention , the notches are formed at both ends of the erection plate, and the attachment mounting portions provided at the distal ends of the support arms are accommodated in the notches so as to be engageable. the simplicity of the compact and the mechanism of space can Figure Rukoto.

A fourth aspect of the present invention, the inner side of both side portions of the vehicle cradle, because the semi-circular peripheral surface of both sides of the support arm arranged slidably, to move the support arm smoothly and stably it can.
The invention of claim 5, the cylinder installation space, and a cylinder base for installing the pair of hydraulic cylinders, arranged by polymerizing a base sheet for supporting the cylinder base, the notch in the corresponding position of the cylinder base and the base sheet a groove, because to face these notched groove disposed a pair of hydraulic cylinders, as well as arranged reasonably spaced pair of fluid pressure cylinders, notch the guide tube to connect to the hydraulic cylinder Pipes can be neatly and compactly arranged along the groove.

The invention of claim 6, the connection end of the guide tube that passes with the fluid pressure device of the hydraulic cylinder, because arranged to project to the outside below the vehicle cradle, of the guide tube you pipe into the lifting column Connection can be performed easily and with good workability.
The invention of claim 7, the coupling portion and the stopper over the bottom of the support arm projecting downwards, connecting the distal end of the piston rod of the body pressure cylinder flow to the connecting portion, provided with the stopper in the cradle vehicle because disposed contactable to the engagement protrusions, and restricts the movement range of the support arm, it is possible to realize a stable movement and safe operation with the support arm.

It is a front view showing the situation at the time of lift up of the mobile lift applied to the present invention. It is a top view which expands and shows the state at the time of the lift down of the fixed lift and the mobile lift applied to this invention. It is a front view showing the situation at the time of the lift down of the mobile lift applied to the present invention. FIG. 4 is a right side view of FIG. 3. FIG. 3 is an enlarged plan view showing a cylinder base disposed at a lower portion inside a vehicle cradle applied to the present invention, and a pair of fluid pressure cylinders are symmetrically disposed outside a notch groove.

FIG. 6 is a front view of FIG. 5. It is a front view showing the situation where a pair of fluid pressure cylinders were attached to the vehicle stand applied to the present invention. FIG. 8 is a right side view of FIG. 7. It is a top view which expands and shows one of the vehicle pedestal applied to this invention, and the support arm assembled | attached to this. It is a front view which expands and shows the fluid pressure cylinder assembled in the vehicle stand applied to this invention, and a support arm.

It is a right view of FIG. FIG. 3 is a plan view of a vehicle cradle applied to the present invention, showing a projected state of left and right support arms.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A description will be given below of an illustrated embodiment in which the present invention is applied to a maintenance lift for a large vehicle. In FIGS. 1 to 12, reference numeral 1 denotes a work floor of an automobile maintenance shop, and a long pit 2 is covered on the floor 1. It is provided along the approach direction of the inspection vehicle.
Wherein the fixed lift 3 to the inside of the pit 2 mobile lift 4 is provided, these lift 3 and 4, the fluid pressure device 5 a, the lift mechanism is controlled hydraulically actuated device 5 a in the embodiment, stretching and lifting A possible rectangular tubular lifting column 6,7 is provided, and the vehicle cradle 8,9 is arranged at the upper end of the column 6,7.
In the figure, reference numeral 10 denotes a pit cover in which the opening of the pit 2 is openably and closably disposed.

The vehicle receiving pedestals 8 and 9 have substantially the same configuration. For convenience, the vehicle receiving pedestal 9 on the moving lift 4 side will be described.
The vehicle cradle 9 is formed in a horizontally long, hollow, and substantially box-like shape, and has a horizontally-long rectangular board 11 having an insertion hole (not shown) for an oil pipe as a pipe, and a board 11 on the board 11. A thicker horizontally elongated rectangular table plate 12 welded by polymerization, thicker side plates 13 and 13 welded and arranged on both sides of the table plate 12, and upper end portions of the side plates 13 and 13 And a pair of thick guides 15, 15 welded to both sides of the table plate 12 and inside the side plates 13, 13.
In the drawing, reference numerals 16 and 17 denote rectangular notches formed at both ends in the length direction of the erection plate 14, and the notch portions 16 and 17 accommodate an attachment mounting portion to be described later in an engageable manner.

The horizontal cross section of the vehicle cradle 9 is formed in a horizontally long rectangular box shape as shown in FIGS. 8 and 11, and the hollow space inside the vehicle pedestal 9 is substantially equally divided vertically at the positions of the guide surfaces 15a, 15a of the guides 15, 15. A support arm movement space 19 for the support arm 18 is formed above the space, and a concave cylinder installation space 20 narrower than the movement space 19 is formed below the space.
In this case, instead of the cross section of the vehicle receiving stand 9 being a box, it is also possible to omit the erection plate 14 and to form the vehicle receiving stand 9 in a substantially U-shape with an open top.

The moving space 19 is formed in a horizontally elongated rectangle defined by the side plates 13, the inner surface of the erection plate 14 or the upper end of the side plate 13, and the guide surface 15 a. 18 is slidably disposed.
The support arms 18, 18 are arranged so as to be able to contact the inner ends thereof, and regulate the movement position inside the support arms, so that the span of the loading position of the vehicle by the left and right attachments described later can be formed to a minimum. .

That is, a stopper pin 54 serving as a stopper is protruded downward from a bottom surface of each of the support arms 18 and 18 at a position outside a connecting pin serving as a connecting portion described later, and the stopper pin 54 is provided at both ends of a cylinder base described later. Are disposed so as to be able to abut against the stoppers 55, 55, which are engagement projections protruding therefrom.
The stoppers 55, 55 are capable of regulating the movement position outside the support arms 18, 18, so that the loading position span of the vehicle by the left and right attachments described later can be formed to the maximum.

  The cylinder installation space 20 is located immediately below the support arm movement space 19, is partitioned by the inner surfaces of the table plates 12, 12 and the guides 15, 15 and their height, and is horizontally long and narrower than the movement space 19. It is formed in a rectangular shape, the inner surface of the substrate 11 is arranged on the lower surface thereof, and a cylinder base on which a cylinder described later is installed is arranged in the space 20.

The support arm 18 is formed by stacking a plurality of horizontally long rectangular plates, and the width of the rectangular plate is formed to be slightly smaller than the facing distance of the side plates 13, 13, and the rectangular plate disposed at an intermediate portion thereof is formed more narrow as shown in FIG. 11, the round bar-shaped guide rod 21 is welded to the outer end, it is welded to the rectangular plate adjacent the semicircular periphery.
Semicircular outer circumferential surface of the guide rod 21 is arranged to protrude from the side surface of the other of the rectangular plate, and disposed close to the outer peripheral surface to the inner surface of the side plate 13, side plates 13 and 13 Contact friction or braking with the inner surface is reduced, and movement of the support arm 18 is facilitated.

The attachment mounting portion 22 is formed in a rectangular tubular shape by welding a plurality of frame plates, and the outer peripheral portion is welded to an end portion of the support arm 18 so that the plate-like attachment 23 can be hooked on the upper end portion. Have been placed.
The cylinder base 24 is substantially the same length as the vehicle cradle 9 and is formed in a horizontally long rectangular plate shape slightly narrower than the horizontal width of the cylinder installation space 20, and forms a substantially house-shaped notch groove 25 in the length direction. A pair of fluid pressures, that is, hydraulic cylinders 26 and 27 in the embodiment, are arranged at symmetrical positions on both sides of the notch groove 25.

The cylinder base 24 is formed in a thick plate member than the outer diameter of the guide tube you later, to a bracket 28, 29 provided upright on the upper surface of the flow body pressure cylinders 26 and 27, the hydraulic cylinder 26 in the embodiment , 27 are connected to each other, and piston rods 30, 31 are arranged at the other end thereof so as to be extendable and contractable, and the distal ends of the piston rods 30, 31 are connected to connecting pins 32, 33 serving as connecting portions .
The connecting pins 32, 33 are projected downward from the bottom surfaces of the left and right support arms 18, 18, and their shafts are connected to the piston rods 30, 31, so that the expansion and contraction displacement of the piston rods 30, 31 is controlled. 18 can be transmitted.

Wherein the pipe is oil conduits 34-37 are conduits inside the cutout groove 25, which is connected to both ends of the hydraulic cylinders 26, 27 the fluid pressure device 5 b, the pressure oil from the hydraulic unit 5 b in the embodiment And the piston rods 30 and 31 can be individually extended and retracted.
A base sheet 38 is overlapped and welded to the lower surface of the cylinder base 24, and both ends of the welded cylinder base 24 and base sheet 38 assembly in the longitudinal direction are fixed by screws or bolts 39 . The shape of the base sheet 38 is formed in a rectangular plate thinner than the cylinder base 24, and a cutout groove 56 having the same shape as the cutout groove 25 is formed on the plate surface.

Assembling of the oil conduit 34, 36 and oil conduits 35 and 37, the oil conduit 34 to 37 to form bent to the size L-shaped, fitted with a joint annexed hex nut at one end, the hydraulic cylinder 26, 27 the oil assembling one end of the conduit 34 to 37, the other end after integration the assembly of the cylinder base 24 and the base sheet 38 to the vehicle cradle 9, to attach the joint.
Then, the assembly of hydraulic cylinders 26, 27 and oil conduits 34 to 37, after assembly to an assembly of the cylinder base 24 and the base sheet 38, so that assembling to the vehicle cradle 9.

Next, when assembling the hydraulic cylinders 26 and 27 , the oil conduits 34 to 37, the cylinder base 24, and the base sheet 38 into the cylinder installation space 20, the assembly is disposed in the cylinder installation space 20, and the oil conduits 34 to The other end of 37 is inserted into an insertion hole (not shown) of the oil conduit of the substrate 11 and protrudes downward. The joint is attached to the end of the pipe, and most of the oil conduits 34 to 37 are cut into the cutout grooves 25 and 56. The pipes are compact and orderly without protruding from them.

The oil conduit 34, 36, the upper assembly of the cylinder base 24 and the base sheet 38, arranged in parallel along the hypotenuse of switching Ketsumizo 25,56, the oil conduit 35, 37 substantially half of the oil conduit 34, 36 The length is arranged coaxially in a plane at the center of the notch grooves 25 and 56.
One end of each of the oil conduits 34 to 37 is protruded below the board 11 as shown in the drawing, and is easily and easily connected to an oil conduit (not shown) which is piped inside the column 7 directly below the vehicle cradle 9. I am able to do it well.

  In addition, in the drawing, reference numeral 40 denotes a guide post for supporting the columns 6 and 7, and an axle 44 of a traveling wheel 43 is mounted on a flange 41 at a base end thereof via a U-bolt 42. Reference numeral 45 denotes a moving rail provided in the pit 2 and is disposed so as to be able to run the running wheels 43. Reference numeral 46 denotes a running motor. Have been.

  A moving chain 53 is wound in an inverted S-shape between a sprocket 51 that can be rotated synchronously with the driven sprocket 49 and a sprocket 52 disposed in the vicinity of the sprocket 51. It is fixed, and the other end is fixed in place of the pit 2 on the fixed lift 8 side.

The vehicle maintenance lift of the present invention configured as described above has lifting columns 6 and 7 provided inside the pit 2 so as to be able to ascend and descend, and has substantially the same vehicle receiving stands 8 and 9 at the upper end thereof.
This will be described with reference to the vehicle cradle 9 of the movable lift 4. The vehicle cradle 9 is formed by assembling a thick frame material (steel material), and has a hollow substantially box- shaped cross section, and the inside thereof is a lower cylinder. It is partitioned into an installation space 20 and a support arm movement space 19 immediately above it.

Accordingly, the vehicle pedestal 9 has a greater cross-sectional modulus and a stronger strength than a structure having a substantially flat cross section, and can sufficiently withstand the bending moment applied to the vehicle pedestal 9 when supporting the vehicle.
In addition, the vehicle pedestal 9 of the embodiment is closed by welding a thick erection plate 14 to the upper ends of the side plates 13, 13, so that the cross section of the vehicle pedestal 9 is formed in a horizontally elongated box shape. Therefore, the section modulus is further increased, the strength is enhanced, and the safety of the vehicle cradle 9 when the vehicle is loaded is improved.

  On the other hand, as described above, the interior of the vehicle cradle 9 divides the cylinder installation space 20 and the support arm movement space 19 immediately above the cylinder installation space 20 into upper and lower sections, so that a box-shaped slider is assembled to the bottom plate as in the related art. Compared with the case where the cylinder is arranged inside, the vehicle receiving base 9 is flat and small, the configuration is simplified, and the constituent members can be easily assembled.

Next, when assembling the hydraulic cylinders 26 and 27 in the cylinder installation space 20, first, the cylinder base 24 and the base sheet 38 are superposed and welded, and the oil conduits 34 to 37 one end of assembling the hydraulic assemblies connected to both ends of the hydraulic cylinders 26 and 27.

Then, said assemblies of hydraulic cylinders 26, 27 and oil conduits 34 to 37, placed symmetrically on either side of the cylinder base 24 and the cutout groove 25 of the base sheet 38 polymerized welded assembly, also notched groove 25, One end of each of the oil conduits 34 to 37 is inserted into 56, and this is protruded and piped below the assembly in which the cylinder base 24 and the base sheet 38 are overlapped and welded .

Therefore, one end of each of the oil conduits 34 to 37 is connected to the cutout groove 56 of the base sheet 38 and the cutout groove 25 formed in the cylinder base 24 having a greater thickness, and thus protrudes from the cylinder base 24 and the base sheet 38. It is arranged neatly and compactly without doing. The assembled state of the oil conduits 34 to 37, the cylinder base 24, and the base sheet 38 is as shown in FIGS.
In this case, the oil conduits 34, 36 and the oil conduits 35, 37 are assembled by bending each of the oil conduits 34 to 37 into large and small L-shapes and attaching a joint having a hexagonal nut to one end thereof. to the hydraulic cylinder 26 and 27 put set one end of the oil conduit 34 to 37.
Then, the assembly of the hydraulic cylinder 26, 27 and oil conduits 34 to 37, after assembly to an assembly of the cylinder base 24 and the base sheet 38, and the hydraulic cylinder 27 and the oil conduit 34-37 and the cylinder base 24 base The assembly of the seat 38 is assembled to the vehicle cradle 9.

Next, the assembly of the hydraulic cylinder 26, 27 and oil conduits 34 to 37 and the cylinder base 24 and the base sheet 38, if incorporated in shea Linder installation space 20, placing the assembly into the cylinder installation space 20, the oil conduit The other end of each of 34 to 37 is inserted into the insertion hole of the oil conduit of the substrate 11 and protrudes downward, and the joint is attached to the end of the pipe. This installation situation is as shown in FIGS.
Thereafter, the support arms 18 are assembled into the vehicle cradle 9.
At this time, the support arms 18, 18 are inserted into the support arm moving space 19 with the attachment mounting portion 22 outside, and the lower surface thereof is placed on the guide surfaces 15a, 15a of the guides 15, 15.

  The support arms 18, 18 are substantially identical, and are formed by stacking a plurality of horizontally long rectangular plates, and a round rod-shaped guide rod 21 is welded to a peripheral surface of a concave portion at an intermediate portion thereof. The peripheral surface is welded to an adjacent rectangular plate, and the outer semicircular peripheral surface protrudes outside the side surface of the support arm 18.

The assembling situation are like FIGS. 10 and 11, the support arm 18 and 18 guide surface 15a, slidably mounted on 15a, and guide semicircular circumferential surface of the top portion side plate 13 of the rod 21 It is engageable arranged to One move sliding on the inner side of 13.
Further, the lower surfaces of the support arms 18, 18 immediately above the cylinder installation space 20 are spaced apart from the hydraulic cylinders 26, 27, and a stopper pin 54 serving as a stopper is arranged between the hydraulic cylinders 26, 27.

Thereafter, the distal ends of the piston rods 30, 31 are connected to connecting pins 32, 33 projecting from the lower surfaces of the support arms 18, 18, respectively, and the other ends of the oil conduits 34 to 37 projecting downward outside the substrate 11. The part is connected to an oil conduit (not shown) that is connected to the column 7.
At this time, since the other ends of the oil conduits 34 to 37 protrude below the substrate 11, the connection between the oil conduits 34 to 37 and the oil conduit arranged in the support column 7 can be made easily and efficiently.

  The assembled vehicle cradle 9 is as shown in FIGS. 10 and 11, and the support arms 18, 18 have a simple configuration in which the plate members are arranged in a stack, so that the plate members are assembled in a box shape, and the piston rod is disposed therein. , The thickness of the support arms 18, 18 or the vehicle pedestal 9 can be reduced or made more compact.

The vehicle cradle 9 is attached to the upper end of the column 7, before use, the attachment 23 is removed from the attachment mounting part 22, and the support arms 18, 18 contract and move into the support arm movement space 19, The column 7 is lifted down and housed in the pit 2.
This situation is as shown in FIGS. 2 to 4, in which the erection plate 14 above the vehicle cradle 9 is located at substantially the same level as the work floor surface 1.

When a vehicle is loaded on the support arms 18 under such a situation, the vehicle to be inspected is moved to the work floor 1 of an automobile garage, and the movable lift 4 is moved so that the distance from the fixed lift 3 is increased. after adjusting the spacing of the front and rear wheels of the test vehicle, the attachment 23 is attached to the attachment mounting portion 22, for lifting up the standoff 6,7.

At this time, since the support arms 18, 18 or the vehicle pedestals 8, 9 are formed to be thin and small in height, and the height from the work floor 1 is suppressed, the pits 2 are slightly lifted up by the posts 6, 7 to raise the pits 2. And moves to a position just above the work floor 1.
Thus, the low position of the vehicle height lower position reduction and jack-up point of the test vehicle, such as a recent, rather is a possibility that the upper portion of the installation plate 14 comes into contact or collides with Ri under circumference of the subject vehicle, By extending the support arms 18, 18, the attachment 23 can be positioned immediately below the jack-up point.

In this case, adjustment of the supporting position of the attachment 23 by the support arms 18 and 18, carried out by causing the hydraulic cylinders 26, 27 is expanded and contracted individually actuated, telescopic piston rod 30, 31 of the cylinder 26 actuated Then, the connecting pins 32, 33 connected to the distal ends thereof are moved together to move the support arms 18, 18, and the moving positions thereof are adjusted to the jack-up point position.

At that time, the support arms 18, 18 are prevented from moving into contact with the outside to the engaging projections 55, 55 stopper over pins 54, 54 projecting from the bottom face is abutting portion, while the support arm 18 , 18 are prevented from moving inward because their inner ends are arranged so as to be abuttable, and safety in use is ensured.

  As described above, the car maintenance lift of the present invention has a small or flat and firmly structured vehicle cradle, and can cope with a reduction in the height of the test vehicle and a reduction in the jack-up point. Since it can be lifted up safely and can be inspected for maintenance, and can be easily manufactured, it is suitable for a maintenance lift for a large vehicle, for example.

2 pits
5a, 5b fluid pressure device (hydraulic device)
6,7 Lifting column 8,9 Vehicle pedestal 11 Substrate 14 Erecting plate 15 Guide 18 Support arm 19 Support arm movement space

Reference Signs List 20 Cylinder installation space 21 Guide rod 22 Attachment mounting part 23 Attachment 24 Cylinder base 25 Notch groove 26, 27 Fluid pressure cylinder (hydraulic cylinder)

32 , 33 connecting part (connecting pin)
34-37 conduit (oil conduit)
38 Base sheet 54 Stopper (stopper pin)
55 engagement projection 56 notch groove

Claims (8)

It has a vehicle pedestal attached to the upper end of the elevating column and accommodated in the pit so as to be able to move in and out of the pit. The vehicle pedestal has a pair of fluid pressure cylinders symmetrically arranged inside, A vehicle maintenance lift including: a pair of support arms operably provided in different directions through operation; and a guide for slidably mounting the pair of support arms. A support arm movement space, which is a space for arranging the pair of support arms movably by the guide , and a cylinder installation space below the support arm movement space and between the guides , A lift for vehicle maintenance , wherein the pair of fluid pressure cylinders are arranged in a cylinder installation space .   2. The vehicle maintenance lift according to claim 1, wherein a erection plate is arranged and closed over the entire area above the opening side of the vehicle cradle, and the vehicle cradle has a hollow, substantially box-shaped cross section.   The vehicle maintenance lift according to claim 2, wherein cutouts are formed at both ends of the erection plate, and the cutouts accommodate an attachment mounting portion provided at a distal end of the support arm so as to be engageable.   2. The vehicle maintenance lift according to claim 1, wherein semicircular peripheral surfaces on both sides of the support arm are slidably disposed inside the both sides of the vehicle cradle.   In the cylinder installation space, a cylinder base for installing a pair of fluid pressure cylinders, and a base sheet supporting the cylinder base are superposed and arranged, and a cutout groove is formed at a corresponding position between the cylinder base and the base sheet. 2. The vehicle maintenance lift according to claim 1, wherein a pair of fluid pressure cylinders are arranged so as to face the notch grooves.   The vehicle maintenance lift according to claim 1, wherein a connection end of a conduit communicating with a fluid pressure device of the fluid pressure cylinder protrudes downward outside the vehicle cradle.   A connecting portion and a stopper are protruded downward at the bottom of the support arm, and a distal end portion of a piston rod of a fluid pressure cylinder is connected to the connecting portion, and the stopper can be brought into contact with an engaging projection provided on a vehicle cradle. The vehicle maintenance lift according to claim 1, wherein the lift is disposed on a vehicle.   The vehicle maintenance lift according to claim 1, wherein a bottom surface of the support arm is slidably disposed on the guide.

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