CN101032974A

CN101032974A - Barrow

Info

Publication number: CN101032974A
Application number: CN 200710067901
Authority: CN
Inventors: 徐军; 周宗武; 王松泉; 刘鸿伟
Original assignee: NINGBO INVENGO IT CO Ltd
Current assignee: NINGBO INVENGO IT CO Ltd
Priority date: 2007-04-05
Filing date: 2007-04-05
Publication date: 2007-09-12

Abstract

The handcart includes one cart body, two sliding bars, two elevating racks on the cart body, and bearing plates on the elevating racks, and each of the elevating racks is one forked structure comprising two support rods hinged in the middle part. The handcart features that one tension spring is set between two sliding bars to make them possess relative sliding trend. By means of lever principle, the force moment the article on the bearing plates produces is always in dynamic balance state with the tension force moment of the tension spring, so that the article is always in certain height for easy operation. In addition, the present invention has the features of compact structure, easy manufacture, low cost and great bearing plate elevating range.

Description

A kind of hand barrow

Technical field

The present invention relates to a kind of hand barrow, specifically refer to a kind of liftable, to make things convenient for the hand barrow of article carrying.

Background technology

Hand barrow has the function of conveniently transporting article.And in places such as library, archive more common hand barrow, its structure is changeless often, promptly hand barrow by car body, be positioned at the roller of car body bottom and the handle that is fixed on the car body is formed, the base plate of car body is bearing plate.The staff owing to can't change the height of hull bottom plate, must could realize the handling labor of books and reference materials through the action of repeatedly bending over when carrying out the books and reference materials loading and unloading.Obviously, such operation has increased working strength, makes the staff after working long hours, and causes the lumbar vertebrae discomfort, causes occupational diseases such as lumbal vertebra when serious.Because the position of hull bottom plate is lower, when not bending over to place books, be easy to the books and reference materials damage is caused unnecessary loss simultaneously.

For this reason, people design hand-lift truck, as Chinese patent Granted publication number for " the column and knee type hand barrow " of CN2410210Y just disclosed so a kind of handbarrow, on the underframe of this hand barrow, be provided with the lifting mechanism that drives by transmission device, bearing plate is placed on the lifting mechanism, and lifting mechanism by the scissor lift support, stablize pull bar, support folding pull bar is realized, transmission device then by crank, belt pulley, fall and form along screw rod and the nut that is fixed on the folding pull bar.During use, the rotation crank by the transmission of belt pulley, makes down along the screw rod rotation, and nut reaches the folding of scissor lift support falling along moving on the screw rod.Therefore adopt such hand-lift truck, can and transport goods to loading and unloading brings great convenience.But after analyzing from its structure as can be known: because the lifting of bearing plate must could realize behind the operating rocker handle, and can't make bearing plate carry out automatic lifting with the supporting power of self.And, rotate crank and also become more painstaking, so still operation like a cork of staff along with the increase of goods.Moreover, adopt belt pulley, screw rod, nut structure, make that whole trolley structure is complicated.

At present, also have and adopt the mode of hydraulic pressure to come the lifting bearing plate, be " the hand push hydraulic platform transport trolley " of the CN2071149U scheme disclosing as Chinese Granted publication number, during use, by stepping the step frame continuously, make the piston rod reach of jack, promote coupling spindle by earrings and rotate, cause each roller on guide rail separately, to move, also can realize the panel lifting in this scheme.But this transport trolley exists panel equally can not be with the drawback of supporting power automatic lifting of self, and also has complex structure, the defective that cost of manufacture is high; Because the existence of jack makes that the panel range is little, can't reduce to hull bottom plate simultaneously, lose the partial volume of transport trolley thus.

Summary of the invention

Technical matters to be solved by this invention is the present situation at prior art, provides a kind of supporting plate can be with self load bearing amount automatic lifting, and simple in structure, and cost is low, uses convenient hand barrow.

The present invention solves the problems of the technologies described above the technical scheme that is adopted: this hand barrow comprises car body, be installed in the wheel of car body bottom, support and laterally slide on first slide bar on the car body base, second slide bar and be positioned at two groups of lifting supports on the car body base and place two groups of supporting plates on the lifting support, wherein, described each lifting support is designed to by hinged all-in-one-piece first strut bar in middle part and the formed scissor structure of second strut bar, and each is first years old, the upper end of second strut bar respectively with described supporting plate sliding block joint mutually, and the bottom of each first strut bar rotates with the two ends of described first slide bar respectively and is connected, the bottom of each second strut bar then rotates with the above-mentioned second slide bar two ends respectively and is connected, and it is characterized in that: be provided with between described first slide bar and second slide bar and make described first, second slide bar has the extension spring of slide relative trend all the time.

As a further improvement on the present invention, on described first slide bar, second slide bar, be respectively equipped with a plurality of mounting holes corresponding, that hang for described extension spring two ends.Utilize each mounting hole, can increase and decrease the radical of extension spring at any time easily, make the lifting sensitivity of supporting plate corresponding with the weight of article.

Described supporting plate can be formed by panel and the upper frame dismounting that is positioned at panel below, and the upper end of each first, second strut bar then can be respectively and upper frame sliding block joint mutually.By means of disassembly and assembly structure, so that make, install and maintenance.

In such scheme, the upper end of each first, second strut bar is good to be separately installed with clutch shaft bearing, in described upper frame, then be provided with the corresponding cooperation of each clutch shaft bearing on horizontal concrete chute.Equally, the both ends of first slide bar, second slide bar preferably are respectively arranged with second bearing, then are provided with on described base and the corresponding horizontal concrete chute down of each second bearing.Make each strut bar and each slide bar like this in sliding process, resistance is little, can realize the lifting of each support flexibly and comfortably.Certainly, also can on the upper end of first, second strut bar, bottom, roller be installed, and on supporting plate and base, being provided with the upper and lower guide rail that rolls for roller within it, such scheme can realize that too above-mentioned resistance is little, flexibly the purpose of slip, lifting.

In the present invention, also the car body base designs can be become be made up of mutual dismounting bonded assembly pedestal and underframe, above-mentioned horizontal concrete chute down is located on the described underframe.So also can reach the purpose of being convenient to installation, maintenance and transportation.

What be highly profitable is, be respectively equipped with guidepost in the supporting plate both sides, and on described car body sidewall, have the longitudinally guiding groove that stretches out for each guidepost, and adopting such scheme, can prevent from effectively to place the inhomogeneous collision phenomenon that supporting plate and car body sidewall occur because of article.In order to reduce the friction between guidepost and the longitudinally guiding groove, on each guidepost, the pulley that is arranged in corresponding longitudinally guiding groove can also be installed simultaneously.

Compared with prior art, because the present invention is a fulcrum with the hinge-point at each strut bar middle part, utilize lever principle, moment and tension spring tension moment that the article deadweight that is placed on the supporting plate is produced are in dynamic balance state all the time, promptly along with the increase and decrease of article, the height of supporting plate is self-regulating, like this in operation process, need not operation, just can make the article height that is placed on the supporting plate automatically be on certain horizontal surface all the time, thereby made things convenient for the operation that takes, puts of article widely, for the user has brought beyond thought facility.Again because extension spring is laterally to place, so need not other operating parts, make hand barrow have compact conformation, simple simultaneously, easy to process, cost is low, the characteristics that supporting plate lifting action radius is big.

Description of drawings

Fig. 1 is the structural representation of the embodiment of the invention;

Fig. 2 is the three-dimensional exploded view of Fig. 1.

The specific embodiment

Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.

As depicted in figs. 1 and 2, this hand barrow comprises car body 1, two groups of lifting supports 2 and places two groups of supporting plates 3 on the lifting support that wherein, the bottom of car body 1 is equipped with four wheels, the base of car body is made framed structure, promptly forms by pedestal 11 with by the underframe 12 that is bolted on the pedestal.First slide bar 4, second slide bar 5 are supported on the underframe 12 and can slide along underframe.In order to reduce the sliding resistance of each slide bar, both ends at above-mentioned first slide bar, second slide bar also are respectively arranged with second bearing, on underframe, then be provided with and the corresponding horizontal concrete chute 121 down of each second bearing, by the motion of each bearing in horizontal concrete chute separately, improve the slip flexibility ratio of each slide bar.

Each is organized 2 of lifting supports and is designed to by hinged all-in-one-piece first strut bar 21 in middle part and second strut bar, 22 formed scissor structures, and more steady for the dipping and heaving that makes each pack support, each is organized the same axis 23 of hinged usefulness of lifting support and realizes.Simultaneously the upper end of each first, second strut bar respectively with supporting plate 3 sliding block joint mutually., consider the convenience of installation, maintenance here, supporting plate is formed by upper frame 32 with by the panel 31 that screw rod, nut are fixed on the upper frame, the upper end of each first, second strut bar then respectively with this upper frame sliding block joint mutually.For each strut bar also can be slided flexibly with respect to upper frame, also be separately installed with clutch shaft bearing in the upper end of each first, second strut bar, in upper frame, then be provided with the corresponding cooperation of each clutch shaft bearing on horizontal concrete chute 321.The bottom of each first strut bar is enclosed within respectively on the two ends of first slide bar 4, is rotationally connected with realization.The bottom of each second strut bar then is enclosed within respectively on second slide bar, 5 two ends in the same way, and each second strut bar also can be rotated with respect to second slide bar.

Be linked with three extension springs 6 successively side by side between above-mentioned first slide bar 4, second slide bar 5, in the present embodiment, be processed with cooresponding mounting hole respectively on first slide bar, second slide bar, the two ends of each extension spring 6 laterally are hung on respectively separately in the mounting hole, make first, second slide bar have the trend of slide relative all the time.Make under each extension spring state of nature, the height of supporting plate roughly maintains an equal level mutually with the height of car body sidewall.

Consider the weight difference of article, on above-mentioned first, second slide bar, be processed with a plurality of standby mounting holes 7, as required, can increase and decrease the radical of extension spring at any time by standby mounting hole, thereby can regulate the application force of extension spring easily, guarantee supporting plate lifting as required.

In the present embodiment, position at the contiguous two ends of upper frame 32 each side also is respectively equipped with guidepost 322, the two ends of each guidepost are held by third axle respectively pulley 8 are installed, on the car body sidewall, then have the longitudinally guiding groove 13 that slides for each pulley, can prevent from like this to place inhomogeneously, produce friction between supporting plate and the car body and make because of article.

When the hand barrow of present embodiment is applied to the library, as long as books 9 are placed on the supporting plate, increase along with books, the upper and lower end of each strut bar slides respectively laterally, driving first, second slide bar slides laterally, extension spring is stretched gradually, and supporting plate descends, and promptly obtains dynamic balance state as shown in Figure 1.Obviously, in this dress book process, the books of the superiors of supporting plate top remain on the sustained height always.Otherwise when unloading books, along with reducing of books on the supporting plate, extension spring bounces back gradually, moves in first, second slide bar, causes the upper and lower end of each strut bar to slide to the inside respectively, and supporting plate raises.Therefore unload in the books process whole, the superiors' books on the supporting plate also are on the sustained height always.

Claims

1, a kind of hand barrow, it comprises car body (1), be installed in the wheel of car body bottom, support and laterally slide on first slide bar (4) on the car body base, second slide bar (5) and be positioned at the two groups of lifting supports (2) on the car body base and place two groups of supporting plates (3) on the lifting support, wherein, described each lifting support (2) is designed to by hinged all-in-one-piece first strut bar in middle part (21) and the formed scissor structure of second strut bar (22), and each is first years old, the upper end of second strut bar respectively with described supporting plate sliding block joint mutually, and the bottom of each first strut bar (21) rotates with the two ends of described first slide bar (4) respectively and is connected, the bottom of each second strut bar (22) then rotates with above-mentioned second slide bar (5) two ends respectively and is connected, and it is characterized in that: be provided with between described first slide bar (4) and second slide bar (5) and make described first, second slide bar has the extension spring (6) of slide relative trend all the time.

2, hand barrow according to claim 1 is characterized in that: be respectively equipped with a plurality of mounting holes corresponding, that hang for described extension spring (6) two ends on described first slide bar (4), second slide bar (5).

3, hand barrow according to claim 1 and 2, it is characterized in that: described supporting plate (3) is formed by panel (31) and upper frame (32) dismounting that is positioned at panel below, the upper end of described each first, second strut bar respectively with this upper frame (32) sliding block joint mutually.

4, hand barrow according to claim 3, it is characterized in that: the upper end of described each first, second strut bar is equipped with clutch shaft bearing respectively, then is provided with the last horizontal concrete chute (321) with the corresponding cooperation of each clutch shaft bearing in described upper frame (32).

5, hand barrow according to claim 1 and 2 is characterized in that: the both ends of described first slide bar, second slide bar are provided with second bearing respectively, then are provided with on described car body base and the corresponding horizontal concrete chute (121) down of each second bearing.

6, hand barrow according to claim 5 is characterized in that: described car body base is made up of mutual dismounting bonded assembly pedestal (11) and underframe (12), and above-mentioned horizontal concrete chute (121) down is located on the described underframe (12).

7, hand barrow according to claim 1 and 2 is characterized in that: described supporting plate (31) both sides are respectively equipped with guidepost (322), and have the longitudinally guiding groove (13) that stretches out for each guidepost on the sidewall of described car body.

8, hand barrow according to claim 7 is characterized in that: the pulley (8) that is arranged in corresponding longitudinally guiding groove is installed on described each guidepost.