CN201228009Y - Up-down trammer - Google Patents

Abstract

The utility model relates to a lifting cart which includes a chassis. At least one pair of wheels is rotationally connected with the bottom part of the chassis, and a push handle is arranged at the upper end of the chassis; an article-carrier capable of lifting is arranged on the chassis; a lifting device is used for driving the article-carrier to move up and down; the chassis is provided with a bottom supporting rack used for bearing the weights of workpieces and the chassis, and the bottom supporting rack is composed of a plurality of rods; each rod is composed of a horizontal brace surface and an arched bearing surface; and through forming each rod on the bottom supporting into the structure comprising the horizontal brace surface and the arched bearing surface, the rod is equivalent to a bridge structure which can bear larger force, that is, the rod can load more than a common hollow rod and have longer service life.

Description

Lifting cart

Technical field

The utility model relates to a kind of go-cart of hand push, particularly a kind of go-cart that promotes goods.

Background technology

China Patent No. is disclosed a kind of loading-unloading vehicle in 200620126603.7, comprises vehicle frame, is mounted slidably in the crane on the vehicle frame (being equivalent to luggage carrier), is arranged at the bont that is used to promote crane on the vehicle frame.Vehicle frame comprises bottom bracing frame and bogie side frame, and the bottom bracing frame in this kind loading-unloading vehicle is the major part of the weight on whole vehicle frame of carrying and the crane, and this structure is when reality is used, and frame ruptures owing to bottom bracing often will carry very heavy weight, and service life is very short.In case and the bottom bracing frame ruptures, whole loading-unloading vehicle can't use, and bring very big inconvenience to use.

Summary of the invention

The purpose of this utility model provides a kind of lifting cart, and the bottom bracing frame on it has longer use

Life-span.

The technical solution of the utility model is: a kind of lifting cart, comprise vehicle frame, and the bottom of described vehicle frame is connected with at least one pair of wheel rotationally, and the upper end of described vehicle frame has handle; Luggage carrier, described luggage carrier liftably are arranged on the described vehicle frame; Bont, described bont) is used to drive described luggage carrier oscilaltion; Described vehicle frame has a bottom bracing frame that is used to carry workpiece and vehicle frame weight, and described bottom bracing frame is made up of the complex root rod member; Described rod member is made of the stull face of a level and the carrying surface of an arch.

The beneficial effects of the utility model are: constitute by the carrying surface of the rod member on the bottom bracing frame being made a stull face and an arch, this rod member just is equivalent to bridge architecture like this, can bear bigger application force, just the load that carries than common hollow rods of this rod member is bigger, and service life is also longer.

Description of drawings

Accompanying drawing 1 is the front view of the lifting cart among the embodiment one;

Accompanying drawing 2 is the left view of the lifting cart among the embodiment one;

Accompanying drawing 3 is the state reference map (being in unloaded propradation) of the lifting cart among the embodiment one;

Accompanying drawing 4 is the running condition reference diagram (schematic side view) of the lifting cart among the embodiment one;

Accompanying drawing 5 is the another running condition reference diagram (schematic side view) of the lifting cart among the embodiment one;

Accompanying drawing 6 is the structural representation of the bogie side frame among the embodiment one;

Accompanying drawing 7 is the structural representation of the bottom bracing frame among the embodiment one;

Accompanying drawing 8 is the section-drawing of accompanying drawing 7 along the A-A direction;

Accompanying drawing 9 be among the embodiment one wheel and axle cooperate scheme drawing;

Accompanying drawing 10 is the luggage carrier among the embodiment one and the structural representation of annex;

Accompanying drawing 11 is the single pulley among the embodiment one and the hungry exploded drawings of pulley sleeve;

Accompanying drawing 12 is the scheme drawing of bont, blocking device and return mechanism among the embodiment one;

Accompanying drawing 13 is the cutaway view of accompanying drawing 12 along the B-B direction;

Accompanying drawing 14 is the cutaway view of accompanying drawing 12 along the C-C direction;

Accompanying drawing 15 is the concrete structure scheme drawing of the back supporting leg among the embodiment one;

The scheme drawing that accompanying drawing 16 is in the lock state for the back supporting leg among the embodiment one;

Accompanying drawing 17 is in the scheme drawing of released state for the back supporting leg among the embodiment one;

Accompanying drawing 18 is the structural representation of the erecting frame among the embodiment one;

Accompanying drawing 19 is the scheme drawing under the blocking device among the embodiment two is in the lock state;

Accompanying drawing 20 is that the blocking device among the embodiment two is in the scheme drawing under the released state;

Wherein: 1, vehicle frame; 11, bogie side frame; 111, column; 112, handle; 12, bottom bracing frame; 121, rod member; 122, stull face; 123, carrying surface; 13, wheel; 14, axle; 15, crossbeam; 16, guide groove;

2, luggage carrier; 21, roller; 22, supporting part; 221, slope; 23, fixed part;

3, bont; 31, running block; 32, fixed pulley group; 33, gear; 34, chain; 341, fixed end; 342, free end; 35, erecting frame; 351, concave surface; 36, pulley; 37, pulley sleeve; 371, perforation; 38, rotating shaft; 381, end cap; 39, rocking handle; 391, handle; 310, track adjusting wheel;

4, blocking device; 41, ratchet; 42, claw; 43, elastomeric pad; 44, elastomeric element; 45, friction lining; 46, friction lining; 47, reduction torsion spring;

5, return mechanism; 51, winding roller; 52, stay cord;

6, back supporting leg; 61, rod member; 62, rod member; 631, tumbler; 632, tumbler; 64, erecting frame; 641, installation site; 65, locking piece; 66, auxiliary wheel;

39 ', rocking handle; 4 ', blocking device; 48 ', pin.

The specific embodiment

Embodiment one:

Accompanying drawing 1 to accompanying drawing 18 is depicted as embodiment one of the present utility model, and it has disclosed a kind of lifting cart of hand propelled, and its chief component comprises vehicle frame 1, luggage carrier 2, is used to drive luggage carrier 2 oscilaltions with this bont 3.

Comprise a bogie side frame 11 and a tetragonal bottom bracing frame 12 that falls " U " shape as Fig. 1～3 vehicle frames 1.As shown in Figure 6, a column 111 that is positioned at both sides on the bogie side frame 11 of " U " shape is arranged along vertical, the cross bar on top constitutes handle 112, bogie side frame 11 inboards also are provided with a crossbeam 15, this crossbeam 15 can be strengthened the stable of whole vehicle frame 1 on the one hand, but also can lay miscellaneous part in the above, crossbeam 15 is usually near handle 112.Bottom bracing frame 12 is positioned at the bottom of bogie side frame 11, and bottom bracing frame 12 and the bogie side frame 11 of " U " shape of falling form the cart body framework of squares.Bogie side frame 11 on the vehicle frame 1 and bottom bracing frame 12 all are to form with the rod member of hollow.Wherein, hollow rods on the bogie side frame 11 is common square tube or pipe, and the rod member 121 on the bottom bracing frame 12 has been done special design at this, shown in Fig. 7～8, stull face 122 by the level that is positioned at the bottom is formed with the carrying surface 123 that is positioned at the arch of stull face 122 tops, this kind design can strengthen the intensity of load of bottom bracing frame 12, this is just as the structure of " arch bridge ", can all decompose ground to the pressure that is carried at the two ends of rod member, so 12 weight that can carry of the bottom bracing frame of this structure are big, long service life.

The bottom of vehicle frame 1 is equipped with a pair of wheel 13, and as shown in Figure 9, a pair of wheel 13 is installed in rotation on the two ends of an axle 14, this 14 bottom that is welded on bogie side frame 11, when not using this go-cart, a pair of wheel 13 and bottom bracing frame 12 all land, and play the effect of supporting whole go-cart weight.

As shown in figure 10, luggage carrier 2 has supporting part 22 and fixed part 23, supporting part 22 extends along the horizontal surface direction, and the end away from fixed part 23 on the supporting part 22 has slope 221, slope 221 just can promote object like a cork by bont 3 after making luggage carrier 2 can be inserted in the bottom of required carrying object more easily, therefore the action of having avoided the operating personnel to bend over has repeatedly alleviated labour intensity, saves human resources.Luggage carrier 2 liftably is installed on the column 111.As shown in Figure 6, offer the guide groove 16 that extends along vertical on the side that a column 111 is relative.Be rotatably mounted with two rollers 21 on the both sides of luggage carrier 2 respectively, roller 21 is positioned at guide groove 16 and contacts with rolling with the cell wall of guide groove 16, luggage carrier 2 by a bont 3 along the upper and lower freely slip of guide groove 16.For make on the luggage carrier 2 stressed everywhere evenly, the lifting of luggage carrier 2 is more smooth and easy, two rollers 21 of its each side lay respectively at the place, both ends up and down of described luggage carrier 2, and guide groove 16 at the width at notch place less than the width between its inner chamber two sides, make by these structures to contact for friction of rolling between luggage carrier 2 and the guide groove 16.Therefore luggage carrier 2 is along the lifting of guide groove 16 and the very steady and smooth that falls, and roller 21 can not deviate from guide groove 16.

When this lifting cart is carried the weight of large volume, also there are some problems, because vehicle frame 1 insufficient height height, when weight is risen to the top of vehicle frame 1, the weight overwhelming majority all is positioned at outside the vehicle frame 1, can make weight have the danger of landing like this, also be provided with the annex 7 that is parallel to vehicle frame on the luggage carrier 2 for this reason, this annex 7 can the lifting along with the lifting of luggage carrier 2, and annex 7 is removably disposed on the luggage carrier 2, as shown in Figure 10, the top of luggage carrier 2 is provided with the slot 24 of pair of parallel, and the bottom 71 of annex 7 is inserted in this respectively in the slot 24, when luggage carrier 2 rises to the top of vehicle frame 1, annex 7 plays the effect of prolongation (or increasing) vehicle frame 1 height, falls to the ground to stop weight to fall.

As shown in Figure 1, 2, bont 3 comprises the molecular fixed pulley group 32 of wheel, gear 33 and the chain 34 by the molecular running block of the wheel of three gear shapes 31, three gear shapes.Running block 31 is installed on the fixed part 23 of luggage carrier 2 respectively by three different erecting frames 35; Fixed pulley group 32 is installed in respectively on the vehicle frame 1 by three different erecting frames 35 equally, and gear 33 is arranged on the vehicle frame 1 rotationally by rotating shaft 38; Chain 34 has a fixed end 341 and a free end 342, wherein fixed end 341 is fixed on the vehicle frame 1, free end 342 is walked around running block 31, fixed pulley group 32, gear 33 successively, and the serobila at these free end 342 places is hidden in one of them column 111, or be in vacant state, or be in stacking states (drawing in the accompanying drawing) freely.As shown in figure 12, the sidepiece of gear 33 also is provided with a chain that is used for free end 342 and imports track adjusting wheel 310 on the gear 33 smoothly, and the outside wall surface of track adjusting wheel 310 is a concave surface 3101, and chain 34 concave surface 3101 therewith pastes mutually.As shown in Figure 11, all be covered with pulley sleeve 37 on each pulley 36 in running block 31 and the fixed pulley group 32, the internal diameter of each pulley sleeve 37 is slightly larger than the diameter of each pulley 36, has two perforation 371 that can supply chain 34 to pass on each pulley sleeve 37.Chain 34 penetrates 371 from one of them perforation, passes the perforation of another from same pulley sleeve 37 371 after walking around pulley 36 again.

Pulley sleeve 37 can guarantee that the chain 34 on running block 31, fixed pulley group 32 and the gear 33 can not deviate from from pulley 36 or rotating shaft 38 in moving process, thereby has effectively avoided danger of deviating to cause because of chain 34 and the trouble of reinstalling chain 34.

The end of rotating shaft 38 is connected with rocking handle 39, rotation crank 39, and rotating shaft 38 can be rotated thereupon, thus driven gear 33 rotates, and gear 33 rotates, and chain 34 will drive luggage carrier 2 and rise or descend along column 111.

In order to make luggage carrier 2 in uphill process, luggage carrier 2 can not fall, the also subsidiary blocking device 4 that is provided with in bont 3.Shown in Figure 12～14, this blocking device 4 comprises the ratchet 41 that is arranged in the rotating shaft 38 and is arranged on being used on the vehicle frame 1 and prevent ratchet 41 rotating claws 42 that claw 42 is meshed with ratchet 41.The cooperation of claw 42 and ratchet 41 makes rotating shaft 38 to rotate toward a direction, and the preset direction of rotating shaft 38 this moment can only be to rotate toward the direction that luggage carrier 2 can rise.Like this, when the luggage carrier 2 that weight is housed in uphill process, can not cause weight to fall go back to ground and damage weight even operating personal unclamps the rocking handle 39 that shakes always yet.Ratchet 41 and claw 42 are set herein, and any will be noted in addition, that is exactly in order to make unloaded luggage carrier 2 original position (bottom of vehicle frame 1) that can fall back smoothly, this characteristic that the restriction rotating shaft 38 of ratchet 41 and claw 42 is rotated to a direction can only be used the stage of rising at luggage carrier 2, and when luggage carrier 2 landed (or zero load resets) downwards, ratchet 42 and claw 41 must be in off working state.The simplest way is exactly to make ratchet 42 and rotating shaft 38 can be in the state of relatively rotating for this reason.In order to reach this purpose, adopt concrete structure as follows in the present embodiment: one section outside thread is set in rotating shaft 38, and rocking handle 39 is provided with screw, rocking handle 39 and rotating shaft 38 screw thread fit connection mutually.Be connected with in the rotating shaft 38 on the side end of rocking handle 39 and also be fixedly connected with end cap 381, be provided with elastomeric element 44 between end cap 381 and the rocking handle 39, be provided with friction lining 45 between ratchet 41 and the rocking handle 38, be provided with friction lining 46 between ratchet 41 and the gear 33, be provided with between claw 42 and the vehicle frame 1 and be used for the reduction torsion spring 47 that claw 42 resets.Elastomeric element 44 is a stage clip in the present embodiment.

Rotating shaft 38 cooperates with blocking device 4 and has two mode of operations, be lock-out state and released state, when lock-out state, friction lining 45 both sides offset with ratchet 41, rocking handle 39 respectively, the both sides of friction lining 46 offset with gear 33 and ratchet 41 respectively, realize that so promptly gear 33 and ratchet 41 offset, thereby make ratchet 41 and rotating shaft 38 spline connection mutually; When released state, friction lining 45 both sides are separated with ratchet 41, rocking handle 39 respectively, friction lining 46 both sides are separated with ratchet 41 and gear 33 respectively, be that gear 33 is separated with ratchet 41, thereby ratchet 41 is enclosed within the rotating shaft 38 rotationally, when rotating shaft 38 again, ratchet 41 does not rotate, thus the direction that makes the rotation that the cooperation of ratchet 41 and claw 42 can not limiting gear 33.In fact, above-mentioned blocking device 4 just is equivalent to a simple free-wheel clutch with the combination of rotating shaft 38, and it can make ratchet 42 and gear 33 at division and combination state down conversion.

When rotating shaft 38 clockwise rotates (luggage carrier 2 risings this moment); Rocking handle 39 is constantly forward precession under the mating reaction of screw and screw thread; Make the gear 33 in the rotating shaft 38; Friction plate 46; Ratchet 41; Friction plate 45; Rocking handle 39 pushes against successively; Utilize the connection of the frictional force formation phase spline between them; Continue rotation rocking handle 39 and can drive rotating shaft 38 coiling chains 34; And then the lifting of drive luggage carrier 2; In ratchet 41 rotation processes; The effect that claw 42 overcomes reduction torsion spring 47 is raised up to tooth top at the bottom of the tooth of ratchet 41; Through behind the tooth top; Claw 42 is at the bottom of falling back tooth from the tooth top of ratchet 41 under the effect of reduction torsion spring 47; When clockwise rotating in the process, operating personnel discharge when shaking 39; Because claw 42 is meshed with ratchet 41; Gear 33 in ratchet 41 and the rotating shaft 38 still offsets simultaneously; Thereby preventing effectively under the effect of the frictional force between ratchet 42 and the gear 7 that rotating shaft 38 from issuing in the traction of chain 34 is conigenous moving revolution, thereby avoids weight to drop.

When rotating shaft 38 rotates counterclockwise (this moment luggage carrier 2 descend); rocking handle 39 contrarotations screw out; gear 33, friction lining 46, ratchet 41, friction lining 45 are separated; this moment, ratchet 41 was enclosed within the rotating shaft 38 rotationally; continue to screw out rocking handle 39; can make rocking handle 39 compress elastomeric element 44; elastomeric element 44 is offseted with rocking handle 39 and end cap 381 respectively; when the friction force of elastomeric element 44 and rocking handle 39, end cap 381 is enough big; rocking handle 39 will rotate with rotating shaft 38; continue to rotate counterclockwise, rocking handle 39 just can drive rotating shaft 38 and rotate counterclockwise.

Since ratchet 41 adopted above-mentioned disengaging type operating mode, make rotating shaft 38 in winding process, rocking handle 39 can drive rotating shaft 38 and reel, in case discharge rocking handle 39, rocking handle 39 can not circle round in this process; Rotating shaft 38 is in the process that rotates counterclockwise, and rocking handle 39 can drive rotating shaft 38 and rotate.The whole operation process is convenient, safety thereby make.

Be provided with the ratchet 41 of unidirectional rotation by rotating shaft 38, realize rotating shaft 38 in the process of clockwise rotating, rotating shaft 38 and ratchet 41 spline ground connection mutually; When rotating shaft 38 discharged rocking handle 39 in rotation process, it can automatically not circle round under the pulling of chain 34 yet, plays the effect of reverse self-locking, had ensured the safety of personnel's operations, avoided in time not locking the accident that the goods that causes falls suddenly because of blocking device.

Be provided with handle 391 in order to save can receive on the space rocking handle 39, simultaneously handle 391 can flexibly be stuck on the rocking handle 39 by a spring foldedly, and this makes handle 391 stably to remain in to use and fold packs up two positions, as shown in Figure 6.

As shown in Figure 2, also be provided with the return mechanism 5 that is used to drive luggage carrier 2 rapid whereabouts between vehicle frame 1 and the luggage carrier 2.Return mechanism 5 comprises winding roller 51, stay cord 52.Winding roller 51 is fixedly installed in the rotating shaft 38, is provided with elastomeric pad 43 between winding roller 51 and the gear 33, and an end of stay cord 52 is fixed on the luggage carrier 2, passes the back on winding roller 51 in the tube chamber of the heel post 111 of the other end from the vehicle frame 1.In the moving process of luggage carrier 2, stay cord 52 is opposite all the time with the sense of motion of chain 34.Be specially: when luggage carrier 2 upwards promoted, chain 34 moved up (being equivalent to the motion of reeling), and stay cord 52 moves downward (being equivalent to unreel motion); And when luggage carrier 2 landing downwards, chain 34 moves down (being equivalent to unreel motion), stay cord 52 upward movements (being equivalent to around the volume motion).This return mechanism 5 can make luggage carrier 2 be subjected to the effect of a propulsive effort in dropping process more, thereby the luggage carrier of having avoided causing because of luggage carrier 2 gravity deficiencies own 2 falls the phenomenon that has some setbacks after rise, reduced that luggage carrier 2 fallings speed are slow, the problem of whereabouts bite, particularly under light condition, when wanting to fall luggage carrier 2 after rise, as long as rotate counterclockwise rotating shaft 38, stay cord 52 is in around volume state (promptly receiving the rope form attitude) always, luggage carrier 2 is just settled out naturally.

Shown in Fig. 4,5, this lifting cart at the rear side of vehicle frame 1 also collapsible and removably be equipped with one after supporting leg 6, this back supporting leg 6 is to use as an auxiliary annex, and this annex can make more steady, safe the parking on the ground of car.

The concrete structure of back supporting leg 6 as shown in figure 15, comprise two rod members 61,62 that fall " U " shape, two rod members 61 and 62 width are basic identical, the height of rod member 61 is greater than rod member 62, two rod members 61 rotate by tumbler 631 respectively with 62 bottom, both sides and are connected, highly low rod member 62 tops are positioned at the corner, both sides of leading " U " shape is rotatably connected to two root posts 111 respectively by tumbler 632 center, just the top of rod member rod member 62 is to be rotatably connected on the vehicle frame 1, and the bottom is bottom with rod member 61 bonded assembly that rotates.The top of rod member 61 is to be installed in rotation on the erecting frame 64 of an installation site 641 with a plurality of differing heights.Shown in Figure 16,17,18, the installation site 641 on the erecting frame 64 is made up of the breach of many groups differing heights, wherein every group be two be positioned on the same horizontal surface and about the breach that distributes.Rod member 61 can be installed on any one group of breach.Different installation sites by conversion rod member 61 like this realize that go-cart makes the gradient difference of vehicle frame in use, and the operator can freely select according to factors such as self heights.After making that rod member 62 installation site 641 therein installs, rod member 61 can not split away off from this installation site 641, also have a locking piece 65 on this erecting frame 61, locking piece 65 is formed by also having the support body how group differing heights breach are formed.As shown in figure 16, when the breach of installation member 61 on the breach on the locking piece 65 and the erecting frame 64 staggered mutually, rod member 61 was locked on the erecting frame 64, and this moment, rod member 61 only can rotate; As shown in figure 16, when two groups of breach when last, rod member 61 just is unlocked, rod member 61 can be taken off from erecting frame 64.Above-mentioned this structure is convenient and simple, processing ease, and cost is low.

In order to make this back supporting leg 6 can not only make things convenient for being parked on the ground of go-cart safety, and can make go-cart moving under the pulsation-free state very much, the lower bottom part of back supporting leg 6 also is equipped with one group of auxiliary wheel 66, shown in Fig. 3,4, the auxiliary wheel 66 of this group is than the little a lot of wheel of above-mentioned wheel 13 diameters.

Introduce each different operating engineering of the lifting cart in the present embodiment below in detail:

Weight is carried to the process of lower from eminence, at first cw shakes rocking handle 39 and makes luggage carrier 2 can be in the position of weight place height, supporting part on the luggage carrier 2 22 is inserted smoothly the bottom of weight by inclined slope, further clockwise rotating rocking handle 39 then can hold up weight, at this moment put down back supporting leg 6 and move this lifting cart backward, promoting lifting cart makes it arrive the destination, reversing sense rotated counterclockwise rocking handle 39 and made luggage carrier 2 gradual drops again this moment, and this releases lifting cart can finish this process.

Move to the process of eminence with above-mentioned process just in time opposite from lower weight, reached the destination of pre-carrying after this moment, the prime minister held up weight from the original place, after this cw shakes rocking handle 39 and makes luggage carrier 2 rise to the height that weight will be carried again, promptly finishes entire work process after unloading weight.This place have attention the time, possibly with luggage carrier 2 returns of zero load, as long as rotate counterclockwise the initial position that rocking handle 39 can make luggage carrier 2 reduction this moment.

Embodiment two:

It and difference of embodiment be blocking device 4 ' concrete structure: referring to accompanying drawing 19 and accompanying drawing 20, the pin 48 of blocking device 4 ' comprise rocking handle 39 ' sidepiece ', pin 48 ' be rotatably connected on the vehicle frame, when this blocking device 4 ' locking, lever 48 ' sidepiece block rocking handle 39 '; When blocking device 4 ' release, lever 48 ' leave rocking handle 39 '.

During work, goods is placed on the luggage carrier, rotation crank 39 ' drive rotating shaft coiling chain then, chain is promoted to desired height by the combined action of fixed pulley group, running block with luggage carrier, luggage carrier upwards slides up to the desired position along described guide groove, by stirring pin, make it block rocking handle and rotate at sidepiece, luggage carrier promptly is fixed on the vehicle frame; When discharging luggage carrier, rotate pin away from rocking handle 39 ', the counter-rotation rocking handle discharges chain, makes luggage carrier be retracted the bottom gradually owing to adopted the structure of many movable pulleys under the effect of the gravity of itself, so can more easily promote weight effortlessly, improve work efficiency.

The blocking device 4 of this kind structure ' than preceding article blocking device 4 ' simple in structure, low cost of manufacture, but operating personal is easy to misoperation when using the blocking device of this kind structure, when luggage carrier is risen to certain position, unclamp do not stir before the hand pin 48 ', this be used to there is not blocking device 4 ' effect, weight can drop down onto the lowest part of vehicle frame rapidly with luggage carrier owing to the reason of self gravitation, and this use is easy to weight is damaged.

The foregoing description only is explanation technical conceive of the present utility model and characteristics; its purpose is to allow the personage that is familiar with this technology can understand content of the present utility model and is implemented; can not limit protection domain of the present utility model with this; all equivalences of being done according to the utility model spirit change or modify, and all should be encompassed in the protection domain of the present utility model.

Claims (1)

1, a kind of lifting cart comprises vehicle frame (1), and the bottom of described vehicle frame (1) is connected with at least one pair of wheel (13) rotationally, and the upper end of described vehicle frame (1) has handle (12);

Luggage carrier (2), described luggage carrier (2) liftably are arranged on the described vehicle frame (1);

Bont (3), described bont (3) are used to drive described luggage carrier (2) oscilaltion;

Described vehicle frame (1) has a bottom bracing frame (12) that is used to carry workpiece and vehicle frame (1) weight, and described bottom bracing frame (12) is made up of the complex root rod member;

It is characterized in that: described rod member is made of the stull face (122) of a level and the carrying surface (123) of an arch.

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