CN210101691U

CN210101691U - Convenient double-layer carrying trolley

Info

Publication number: CN210101691U
Application number: CN201920791898.7U
Authority: CN
Inventors: 王俊强; 曹洪飞; 王宇鑫; 石磊
Original assignee: Xingtai Polytechnic College
Current assignee: Xingtai Polytechnic College
Priority date: 2019-05-29
Filing date: 2019-05-29
Publication date: 2020-02-21
Anticipated expiration: 2029-05-29

Abstract

The utility model provides a convenient double-layer carrying trolley, which comprises an upper layer desktop, a lower layer desktop, a plurality of lifting devices and a plurality of locking devices; the upper layer desktop and the lower layer desktop are connected through a plurality of lifting devices and a plurality of locking devices; the upper layer desktop comprises a fixed desktop, a first movable desktop and a second movable desktop; the first movable desktop and the second movable desktop are both connected in the corresponding fixed desktop in a sliding manner and can respectively move from two opposite sides to the direction close to and far away from the center of the fixed desktop; the lower layer desktop is positioned below the upper layer desktop; the lower layer desktop and the upper layer desktop have the same structure, and the fixed desktop of the lower layer desktop and the fixed desktop of the upper layer desktop are symmetrical about the center of the horizontal middle section of the lower layer desktop and the fixed desktop of the upper layer desktop; and a plurality of movable wheels are arranged at the bottom of the lower tabletop. Convenient double-deck year thing dolly, interval between the upper and lower layer desktop is adjustable, and the length of desktop is adjustable.

Description

Convenient double-layer carrying trolley

Technical Field

The utility model belongs to transport year thing equipment field especially relates to a convenient double-deck thing dolly that carries.

Background

With the rapid improvement of the living standard of people, the logistics industry of China is rapidly developed. The short-distance transportation services such as moving, flower conveying, logistics express delivery and the like become an indispensable part of daily work and life of people. The current carrying tools are generally carrying trolleys of various types, and because the size of the trolleys is not variable, before carrying articles, the pair of contradiction between the cargo capacity and the traffic size limit needs to be considered carefully: the trolley with large size can carry more objects but can be clamped when meeting a room door, an elevator and the like, and needs to be manually assembled and disassembled for the second time; the small size of the cart increases the number of times of transportation due to the small load. Therefore, the workers have to carry the carrying trolleys of various types, so that the carrying space of the transport vehicle is occupied, the loading and unloading times in the process of transporting the objects are increased, the labor intensity is greatly increased, and the working efficiency is reduced.

The width and the height of the carrying trolley with the liftable and telescopic table top can be adjusted as required, so that the problems of high labor intensity, low efficiency and the like of a common trolley in the process of transferring articles can be solved.

Disclosure of Invention

In view of this, the utility model aims at providing a convenient double-deck thing dolly of carrying to overcome prior art's defect, lower floor's desktop is fixed, utilizes rotatory elevating gear can realize the function that reciprocates of lift upper desktop, and then realizes the regulation of dolly in the ascending direction of height, and upper and lower two-layer desktop all can stretch out and draw back in length direction simultaneously.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

a convenient double-layer carrying trolley comprises an upper layer desktop, a lower layer desktop, a plurality of lifting devices and a plurality of locking devices;

the upper layer desktop and the lower layer desktop are connected through a plurality of lifting devices and a plurality of locking devices; the upper layer desktop comprises a fixed desktop, a first movable desktop and a second movable desktop; the first movable desktop and the second movable desktop are both connected in the corresponding fixed desktop in a sliding manner and can respectively move from two opposite sides to the direction close to and far away from the center of the fixed desktop;

the lower layer desktop is positioned below the upper layer desktop; the lower layer desktop and the upper layer desktop have the same structure, and the fixed desktop of the lower layer desktop and the fixed desktop of the upper layer desktop are symmetrical about the center of the horizontal middle section of the lower layer desktop and the fixed desktop of the upper layer desktop; and a plurality of movable wheels are arranged at the bottom of the lower tabletop.

Furthermore, a plurality of lifting devices are uniformly arranged on two end faces of the two fixed desktops, which are not provided with the first movable desktop and the second movable desktop; the locking devices are divided into two groups and are respectively arranged between the upper layer desktop and the lower layer desktop and close to the lifting devices on the two sides.

Further, the first movable table top comprises a first movable table plate, the second movable table top comprises a second movable table plate, and the first movable table plate and the second movable table plate can move towards two opposite sides; the fixed desktop comprises two beams arranged in parallel, a fixed desktop and longitudinal beams; the outer sides of the two cross beams are provided with lifting devices, and a fixed table plate, a first movable table plate and a second movable table plate are arranged between the two cross beams; the longitudinal beam is arranged on the lower surface of the fixed table plate; the longitudinal beam is positioned between the first movable table board and the second movable table board.

Furthermore, the beam is composed of a mouth-shaped pipe and an L-shaped plate; the L-shaped plate and the upper surface of the mouth-shaped pipe form a C-shaped opening, and the opening side of the C-shaped opening is opposite to one side where the longitudinal beam is located; a fixed table plate, a first movable table plate and a second movable table plate are sequentially arranged in the C-shaped opening from top to bottom; the upper surface of the fixed table plate is fixedly connected with the lower surface of the inner top of the C-shaped opening, and the first movable table top and the second movable table top can independently move in the C-shaped opening.

Furthermore, a first extension beam and a second extension beam are connected in the mouth-shaped pipe in a sliding mode, and the first extension beam and the second extension beam can move along the moving direction of the first movable table top and the second movable table top respectively; the upper surface of one end, far away from the fixed table plate, of the extension beam is fixedly connected with the lower surface of one end, far away from the fixed table plate, of the movable table plate through a first table plate cushion block; the upper surface of one end, far away from the fixed table, of the extension beam II is fixedly connected with the lower surface of one end, far away from the fixed table, of the movable table II through a table cushion block II.

Furthermore, the lifting device comprises a lower lifting block, a guide rod, a guide sleeve and an upper lifting block; the lower lifting block is arranged on the lower layer desktop, and the upper lifting block is fixed on the upper layer desktop; a guide rod is fixedly arranged on the lower lifting block; the guide rod is sleeved at the lower end in the guide sleeve, and the guide rod and the guide sleeve can move up and down relatively; the outer surface of the upper end of the guide sleeve is sleeved with an upper lifting block, and the upper lifting block are rotatably connected; in all the lifting devices, the outer surface of a guide rod of one lifting device is provided with trapezoidal threads, the inner surface of a corresponding guide sleeve is provided with trapezoidal threads, and a rotating handle is arranged on the part of the guide sleeve above an upper lifting block; in all the lifting devices, except the lifting device provided with the handle, the outer surface of the guide rod of the other lifting devices is connected with the inner surface of the guide sleeve in a sliding way.

Further, the locking device comprises two linkages, an X-shaped bracket and a locking device; the two linkages are respectively and fixedly connected with the upper layer desktop and the lower layer desktop, an X-shaped bracket is arranged between the two linkages, and the two linkages are hinged with the X-shaped bracket; the locking device is arranged at the intersection point of the X-shaped support, and locking of the upper layer desktop in the height direction can be achieved.

Further, the linkage device comprises a linkage shell, and two sides of the linkage shell are open; the linkage shell is fixed on the upper layer desktop or the lower layer desktop; a gear shaft is arranged at the center in the linkage shell, and two sides of the gear shaft are respectively meshed with a rack of a linkage rod; the linkage rod can slide in the linkage shell and extend out of the linkage shell.

Further, the locking device comprises two fixed clamping plates and two wedge-shaped top rings; the outer sides of the two fixed clamping plates are respectively connected with an X-shaped bracket through fasteners, and the inner sides of the two fixed clamping plates are respectively fixedly connected with a wedge-shaped top ring; the two wedge-shaped top rings are a pair of circular rings with the central axes thereof coincident and in one-way rotation fit; the two wedge-shaped top rings are oppositely arranged, and two opposite sides are provided with a wedge-shaped clamping groove disc on one side and a wedge-shaped clamping groove shaft on the other side; the wedge-shaped clamping groove disc and the wedge-shaped clamping groove shaft are in the same wedge-shaped surface shape and are attached oppositely; the end part of one end of the wedge-shaped clamping groove shaft can penetrate through the wedge-shaped clamping groove disc and the fixed clamping plate arranged on the wedge-shaped clamping groove disc, the other end of the wedge-shaped clamping groove shaft sequentially penetrates through the wedge-shaped top ring where the wedge-shaped top ring is located and the fixed clamping plate corresponding to the wedge-shaped top ring, and a handle is integrally formed at the end part and can be used for manual rotation; and locking springs are arranged between the two wedge-shaped top rings and the fixed clamping plates corresponding to the two wedge-shaped top rings respectively.

Furthermore, a plurality of movable wheels are uniformly arranged on the lower surfaces of the fixed table plate, the first extension beam and the second extension beam corresponding to the lower-layer table top.

Compared with the prior art, a convenient double-deck year thing dolly have following advantage:

the utility model discloses a convenient double-layer loading trolley, a lifting device and a locking device are arranged between an upper layer desktop and a lower layer desktop, so that the upper layer desktop can move up and down; in addition, because the upper layer desktop and the lower layer desktop are both provided with the first movable desktop and the second movable desktop which can respectively move towards two opposite sides in the middle fixed desktop, the upper layer desktop and the lower layer desktop can be adjusted in the length direction.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

FIG. 1 is a structural diagram of a convenient double-deck carrier cart according to an embodiment of the present invention in an open position;

FIG. 2 is a structural diagram of the convenient double-deck cargo cart in a retracted state according to the embodiment of the present invention;

FIG. 3 is an exploded view of the lower tabletop of the convenient double-deck carrier cart in accordance with an embodiment of the present invention;

FIG. 4 is an assembly view of a lower deck cross member of the convenience double-deck carrier cart in accordance with an embodiment of the present invention;

FIG. 5 is a lower deck cross-beam configuration view of the convenient double deck load cart in accordance with an embodiment of the present invention;

FIG. 6 is a structural diagram of a lifting device of the convenient double-deck carrying trolley according to the embodiment of the invention;

FIG. 7 is a block diagram of a locking mechanism for a portable double-deck carrier cart in accordance with an embodiment of the present invention;

FIG. 8 is an exploded view of the linkage of the convenience double-deck load cart in accordance with an embodiment of the present invention;

FIG. 9 is an exploded view of the X-bracket and lock of the portable double-deck carrier cart in accordance with an embodiment of the present invention;

FIG. 10 is a schematic structural view of a wedge-shaped slot tray and a wedge-shaped slot shaft of the convenient double-deck carrier cart according to an embodiment of the present invention;

FIG. 11 is a first drawing illustrating the separation of the wedge-shaped slot tray and the wedge-shaped slot shaft of the convenient double-deck carrier cart according to the embodiment of the present invention along the direction B-B in FIG. 10;

FIG. 12 is a drawing illustrating a second embodiment of the present invention showing a configuration in which the wedge-shaped slot tray and the wedge-shaped slot shaft of the convenient double-deck carrier cart are separated from each other along the direction B-B in FIG. 10;

FIG. 13 is a first drawing illustrating the engagement between the wedge-shaped slot plate and the wedge-shaped slot shaft of the convenient double-deck carrier cart according to the embodiment of the present invention along the direction B-B in FIG. 10;

fig. 14 is a second view showing the engagement between the wedge-shaped slot tray and the wedge-shaped slot shaft of the convenient double-deck carrier cart according to the embodiment of the present invention along the direction B-B in fig. 10.

Description of reference numerals:

1. an upper layer desktop; 2. a lower layer desktop; 2-1, fixing the desktop; 2-1-1, a beam; 2-1-1-1, and a C-shaped opening 2-1-1-1; 2-1-1-2 and a 'square' shaped tube 2-1-1-2; 2-1-2, longitudinal beams; 2-1-3, fixing a table plate; 2-2, moving the desktop I; 2-2-1, extending the first beam; 2-2-2, moving the first table plate; 2-2-3, a first screw; 2-2-4, a first table cushion block; 2-3, moving the desktop II; 2-3-1, extending a second beam; 2-3-2, moving a second table plate; 2-3-3 and a second screw; 2-3-4, a second table cushion block; 2-4, moving the wheels; 3. a lifting device; 3-1, a lower lifting block; 3-4, rotating a handle; 3-5, a guide rod; 3-6, a guide sleeve; 3-7, an upper lifting block; 4. a locking device; 4-1, a linkage device; 4-1-1, a linkage shell; 4-1-2, a linkage rod; 4-1-3, gear shaft; 4-2, X-shaped bracket; 4-3, a locking device; 4-3-1, fixing the splint; 4-3-2, a wedge-shaped top ring; 4-3-3, wedge type card slot disc; 4-3-4, wedge type card slot shaft; 4-3-5, a locking spring; 4-3-6, connecting bolts; 4-3-7 and a handle.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

As shown in fig. 1 and 2, a convenient double-layer carrying trolley comprises an upper layer table top 1, a lower layer table top 2, four lifting devices 3 and two locking devices 4; the upper layer desktop 1 and the lower layer desktop 2 are connected through four lifting devices 3 and two locking devices 4, and both are arranged in parallel with the horizontal plane; the upper-layer desktop 1 comprises a fixed desktop 2-1, a first movable desktop 2-2 and a second movable desktop 2-3; the first movable desktop 2-2 and the second movable desktop 2-3 are both connected in the corresponding fixed desktop 2-1 in a sliding manner and can respectively move from the left side and the right side of the fixed desktop 2-1 to the direction close to and far away from the center of the fixed desktop 2-1, so that the extension and contraction of the desktops are realized; the lower layer desktop 2 is positioned below the upper layer desktop 1; the lower layer desktop 2 and the upper layer desktop 1 have the same structure, and the lower layer desktop 2 and the upper layer desktop 1 can have all structures which are symmetrical about the center of the horizontal middle section of the upper layer desktop and the lower layer desktop, or can have only the fixed desktop part which is symmetrical about the center of the horizontal middle section of the upper layer desktop and the lower layer desktop; and a plurality of movable wheels 2-4 are arranged at the bottom of the lower layer desktop. Specifically, the plurality of movable wheels 2-4 are uniformly arranged on the lower surfaces of the fixed table plates 2-1-3, the movable table tops 2-2 and the extension beams 2-3 of the movable table tops 2-3 corresponding to the lower-layer table top 2, namely the plurality of movable wheels 2-4 are uniformly arranged on the lower surfaces of the fixed table plates 2-1-3, the extension beams 2-2-1 and the extension beams 2-3-1 corresponding to the lower-layer table top 2. The upper layer desktop and the lower layer desktop are both arranged into structures consisting of the fixed desktop, the first movable desktop and the second movable desktop, so that the upper layer desktop and the lower layer desktop can be respectively unfolded and retracted independently, and the sliding function of the desktops can be realized only by moving the required desk plate in the left-right direction in a pushing and pulling mode.

The four lifting devices 3 are divided into two groups and are respectively arranged on the front end surface and the rear end surface of the two fixed table tops 2-1; two locking devices 4 are arranged between the upper layer table top 1 and the lower layer table top 2, one is close to the lifting device at the front side, and the other is close to the lifting device at the rear side.

As shown in fig. 3, the first movable tabletop 2-2 comprises a first movable tabletop 2-2-2, the second movable tabletop 2-3 comprises a second movable tabletop 2-3-2, and the first movable tabletop 2-2-2 and the second movable tabletop 2-3-2 can move towards two opposite sides; the fixed desktop 2-1 comprises two cross beams 2-1-1, a fixed desktop 2-1 and longitudinal beams 2-1-2 which are arranged in parallel; the outer sides of the two beams 2-1-1 are respectively provided with a lifting device 3, and a fixed table plate 2-1-3, a movable table plate I2-2-2 and a movable table plate II 2-3-2 are arranged between the two beams 2-1-1; the lower surface of the fixed table plate 2-1-3 is provided with the longitudinal beam 2-1-2; the longitudinal beam 2-1-2 is positioned between the first movable table board 2-2-2 and the second movable table board 2-3-2.

As shown in fig. 3-5, the beam 2-1-1 is formed by integrally forming a square tube 2-1-1-2 and an L-shaped plate; the L-shaped plate and the upper surface of the mouth-shaped pipe 2-1-1-2 form a C-shaped opening 2-1-1, and the opening side of the C-shaped opening 2-1-1-1 is opposite to the side where the longitudinal beam 2-1-2 is located; a fixed table plate 2-1-3, a movable table plate I2-2-2 and a movable table plate II 2-3-2 are sequentially arranged in the C-shaped opening 2-1-1 from top to bottom; the upper surface of the fixed table plate 2-1-3 is fixedly connected with the lower surface of the inner top of the C-shaped opening 2-1-1, the first movable table plate 2-2-2 and the second movable table plate 2-3-2 can independently move in the C-shaped opening 2-1-1-1, specifically, two sides of the first movable table plate 2-2-2 are slidably connected with the side surface of the C-shaped opening 2-1-1-1 through sliding rails and sliding chutes, and two sides of the lower surface of the second movable table plate 2-3-2 are slidably connected with the lower surfaces of the C-shaped openings 2-1-1-1 at two sides through sliding rails and sliding chutes.

The mouth-shaped pipe 2-1-1-2 is connected with a first extension beam 2-2-1 and a second extension beam 2-3-1 in a sliding mode, and the first extension beam 2-2-1 and the second extension beam 2-3-1 can move along the moving direction of the first movable table top and the second movable table top respectively; the upper surface of one end, far away from the fixed table plate 2-1-3, of the extension beam I2-2-1 is fixedly connected with the lower surface of one end, far away from the fixed table plate 2-1-3, of the movable table plate I2-2-2 through a table plate cushion block I2-2-4 in a welding and adhesive bonding mode, or the upper surface and the lower surface are in threaded connection and fixed through a screw I2-2-3; the upper surface of one end, far away from the fixed table plate 2-1-3, of the extension beam II 2-3-1 is fixedly connected with the lower surface of one end, far away from the fixed table plate 2-1-3, of the movable table plate II 2-3-2 through a table plate cushion block II 2-3-4 in a welding and adhesive bonding mode, or the upper surface and the lower surface are fixedly connected through a screw bolt II 2-3-3 in a threaded mode. The thicknesses of the upper edges of the first table cushion block 2-2-4, the second table cushion block 2-3-4 and the lower square-shaped structure (namely, square-shaped pipe) of the cross beam 2-1-1 are equal to each other, so that the first movable table 2-2-2 and the second movable table 2-3-2 are kept horizontal when sliding.

As a preferred embodiment of the utility model, the cross-sectional shapes of the first extension beam 2-2-1 and the second extension beam 2-3-1 are the same, and can be single-side trapezoids or single-side steps, and the heights are the same as the crotch height of the cross beam 'mouth' type structure; the width of the first extension beam 2-2-1 is at the top, the narrow side is at the bottom, and the vertical side is in contact with the vertical side of the opening-shaped structure of the cross beam; the extension beam II 2-3-1 and the extension beam I2-2-1 are placed in an inverted mode, the wide edge is arranged below the extension beam II, and the narrow edge is arranged above the extension beam II; the two trapezoidal sides or the oblique sides are contacted.

As shown in fig. 6, the lifting device 3 comprises a lower lifting block 3-1, a guide rod 3-5, a guide sleeve 3-6 and an upper lifting block 3-7; the lower lifting block 3-1 is arranged on the outer side surface of the beam 2-1-1 of the fixed desktop 2-1 of the lower desktop 2, and the upper lifting block 3-7 is fixed on the outer side surface of the beam 2-1-1 of the fixed desktop 2-1 of the upper desktop 1; a guide rod 3-5 is fixedly arranged on the lower lifting block 3-1; the guide rod 3-5 is sleeved at the inner lower end of the guide sleeve 3-6, and the guide rod and the guide sleeve can move up and down relatively; the outer surface of the upper end of the guide sleeve 3-6 is sleeved with an upper lifting block 3-7 which are rotationally connected; in all the lifting devices 3, the outer surface of a guide rod 3-5 of one lifting device 3 is provided with trapezoidal threads, the inner surface of a corresponding guide sleeve 3-6 is provided with trapezoidal threads, a rotary handle 3-4 is arranged at a position, above an upper lifting block 3-7, of the guide sleeve 3-6, the rotary handle 3-4 is coaxial with the sleeve 3-3 to be provided with trapezoidal internal threads, so that rotary power is provided for the rotary handle 3-3, and the rotary handle 3-4 on the rotary sleeve can drive the upper layer of table top to ascend and descend in use; in all the lifting devices 3, except the lifting device 3 provided with the handle, the outer surfaces of the guide rods 3-5 of the other lifting devices 3 are in sliding connection with the inner surfaces of the guide sleeves 3-6, so that the supporting and guiding functions in the lifting process of the upper layer table top are realized. Specifically, the outer surface of the guide rod 3-5 and the inner surface of the guide sleeve 3-6 of the rest of the lifting devices 3 are slidably connected in the following manner: the outer surfaces of the corresponding guide rods 3-5 are provided with sliding blocks, the inner surfaces of the corresponding guide sleeves 3-6 are provided with sliding chutes or sliding rails, and the bottoms of the guide sleeves 3-6 limit the downward movement positions of the sliding blocks. Besides, the outer surface of the guide rod 3-5 and the inner surface of the guide sleeve 3-6 can be smooth surfaces, and then the up-and-down moving distance of the guide rod and the guide sleeve is limited radially.

As shown in fig. 1, 2 and 7, the locking device 4 comprises two linkages 4-1, an X-shaped bracket 4-2 and a locking device 4-3; the two linkages 4-1 are respectively and fixedly connected with the upper layer desktop 1 and the lower layer desktop 2, an X-shaped bracket 4-2 is arranged between the two linkages 4-1, and the X-shaped brackets are hinged with the X-shaped bracket 4-2, so that the upper linkage 4-1 moves up and down along with the upper layer desktop 1 to drive the X-shaped bracket 4-2 to change an included angle; the locking device 4-3 is installed at the intersection of the X-shaped support 4-2, and after the height of the upper-layer desktop 1 is adjusted, locking of the upper-layer desktop 1 in the height direction can be achieved.

As shown in fig. 8, the linkage 4-1 comprises a linkage shell 4-1-1, wherein two sides of the linkage shell 4-1-1 are open; the linkage shell 4-1-1 of the upper linkage device is fixed on the upper layer desktop 1, and the linkage shell 4-1-1 of the lower linkage device is fixed on the lower layer desktop 2; a gear shaft 4-1-3 is respectively arranged at the inner centers of the two linkage shells 4-1-1, and two sides of the gear shaft 4-1-3 are respectively meshed with a rack of a linkage rod 4-1-2; the linkage rod 4-1-2 can slide in the linkage shell 4-1-1 and extend out of the linkage shell 4-1-1. The rack is arranged on the inner side of the linkage rod where the rack is arranged, and symmetrical sliding can be realized through meshing contact of the rack and the gear shaft 4-1-3, so that effective connection between the X-shaped support 4-2 and the upper layer desktop and the lower layer desktop is ensured when the included angle is changed.

As shown in fig. 9-14, the locking device 4-3 includes two fixing jaws 4-3-1 and two wedge-shaped top rings 4-3-2; the outer sides of the two fixed splints 4-3-1 are respectively connected with an X-shaped bracket 4-2 through connecting bolts 4-3-6, and the inner sides of the two fixed splints 4-3-1 are respectively fixedly connected with a wedge-shaped top ring 4-3-2 so as to realize that the wedge-shaped top ring 4-3-2 rotates along with the X-shaped bracket 4-2; the two wedge-shaped top rings 4-3-2 are a pair of circular rings with the central axes thereof coincident and in one-way rotation fit; the two wedge-shaped top rings 4-3-2 are oppositely arranged, and two opposite sides are provided, wherein one side is provided with a wedge-shaped clamping groove disc 4-3-3, and the other side is provided with a wedge-shaped clamping groove shaft 4-3-4; the wedge-shaped slot disc 4-3-3 is the same as the wedge-shaped surface of the wedge-shaped slot shaft 4-3-4, and is attached oppositely; one end part of the wedge-shaped clamping groove shaft 4-3-4 can penetrate through a through hole in the center of the wedge-shaped clamping groove disc 4-3-3 and the fixed clamping plate 4-3-1 installed on the wedge-shaped clamping groove shaft, the other end of the wedge-shaped clamping groove shaft sequentially penetrates through the wedge-shaped top ring 4-3-2 where the wedge-shaped clamping groove shaft is located and the through hole in the fixed clamping plate 4-3-1 corresponding to the wedge-shaped top ring, and a handle 4-3-7 used for manual rotation is integrally formed at the penetrating end part; the rotation of the wedge-shaped clamping groove shaft 4-3-4 can be realized by rotating the handle 4-3-7, so that the separation and the clamping of the wedge-shaped top ring 4-3-2 are realized, and the opening and the locking of the locking device are realized. A locking spring 4-3-5 is arranged between the wedge-shaped top ring 4-3-2 where the wedge-shaped clamping groove shaft 4-3-4 is positioned and the corresponding fixed clamping plate 4-3-1. Two locking springs 4-3-5 are arranged between the same fixed splint 4-3-1 and the wedge-shaped top ring 4-3-2 adjacent to the same fixed splint, are respectively arranged at two sides of the wedge-shaped clamping groove shaft 4-3-4, respectively have one end embedded into blind holes at two sides of the through hole of the fixed splint 4-3-1 corresponding to the fixed splint, and have the other end freely contacted with the wedge-shaped top ring 4-3-2 corresponding to the fixed splint, and the locking springs 4-3-5 are arranged in parallel with the wedge-shaped clamping groove shaft 4-3-4. Therefore, the four locking springs 4-3-5 are arranged in groups of two pairs between the fixed clamping plates 4-3-1 on the two sides and the corresponding wedge-shaped top rings 4-3-2 respectively, the two wedge-shaped top rings 4-3-2 can be pressed tightly, and the single-wave clutch 4-3-2 is assisted to be opened and closed under the action of the wedge-shaped clamping groove discs 4-3-3, so that the upper-layer desktop 1 is locked in the height direction. The wedge-shaped clamping groove disc 4-3-3 and the wedge-shaped clamping groove shaft 4-3-4 are identical in wedge-shaped surface shape and are attached oppositely, when the height of an upper layer table top needs to be adjusted, the wedge-shaped clamping groove shaft 4-3-4 is rotated by 180 degrees, the contact position of the wedge-shaped clamping groove shaft and the wedge-shaped clamping groove shaft is changed, the wedge-shaped clamping groove disc and the wedge-shaped clamping groove shaft are pushed away, and the wave clutch 4-3-2 is separated; after the height of the upper layer of the table top is adjusted, the wedge-shaped clamping groove shaft 4-3-4 is reversely rotated by 180 degrees, the contact position of the wedge-shaped clamping groove shaft and the wedge-shaped clamping groove shaft is changed, the wedge-shaped clamping groove shaft and the wedge-shaped clamping groove shaft are pushed and closed by the force of the locking spring, and the wave-type clutch 4-3-2 is clamped.

When in use, the trolley is pushed (or carried) to a required position, the wedge-shaped clamping groove shaft is rotated for 3-4180 degrees, and the wave clutch 4-3-2 in a clamping state is separated; rotating a rotating handle 3-4 of the trolley, and lifting the upper plate surface of the trolley by utilizing the matching of a trapezoidal external thread rod 3-2 and a trapezoidal internal thread sleeve 3-3; the wedge-shaped clamping groove shaft is rotated in the reverse direction for 3-4180 degrees, the wave clutch 4-3-2 in the separation state is clamped, and therefore the height of the table top is locked, and the table top is prevented from falling due to the gravity of the loaded object.

In order to increase the carrying area, the first movable table plate 2-2-2 and the second movable table plate 2-3-2 under the upper fixed table plate 2-1-3 are pulled out, the area can be enlarged to about 3 times of the original area to the maximum extent, so that the carrying area is increased, and more articles are placed. The operation method of the lower layer table plate is the same.

When the desk is retracted, the first movable desk plate 2-2-2 and the second movable desk plate 2-3-2 below the upper fixed desk plate 2-1-3 are pushed back, and the first movable desk plate 2-2 and the second movable desk plate 2-3 are hidden under the fixed desk plate 2-1-3 to form a desktop; meanwhile, rotating the wedge-shaped clamping groove shaft by 3-4180 degrees to separate the wave clutch 4-3-2 in the clamping state; rotating a rotating handle 3-4 of the trolley, and lowering the upper plate surface of the trolley by utilizing the matching of a trapezoidal external thread rod 3-2 and a trapezoidal internal thread sleeve 3-3; the wedge-shaped clamping groove shaft is rotated in the reverse direction for 3-4180 degrees, the wave clutch 4-3-2 in the separation state is clamped, and the upper layer table top is locked.

The convenient double-deck thing dolly of carrying of this embodiment, the function of upper desktop is realized lifting by the rotatory handle on the accessible rotary lifting device, realizes the regulation of dolly desktop length (the distance between left side and the right side) through removing the desktop, locking means is with dolly highly fixed to realize carrying the thing function under the various occasions.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a convenient double-deck thing dolly that carries which characterized in that: comprises an upper layer desktop (1), a lower layer desktop (2), a plurality of lifting devices (3) and a plurality of locking devices (4);

the upper layer desktop (1) and the lower layer desktop (2) are connected through a plurality of lifting devices (3) and a plurality of locking devices (4); the upper layer desktop (1) comprises a fixed desktop (2-1), a first movable desktop (2-2) and a second movable desktop (2-3); the first movable desktop (2-2) and the second movable desktop (2-3) are both connected in the corresponding fixed desktop (2-1) in a sliding manner and can respectively move from two opposite sides to the direction close to and far away from the center of the fixed desktop (2-1);

the lower layer desktop (2) is positioned below the upper layer desktop (1); the lower layer desktop (2) has the same structure as the upper layer desktop (1); and a plurality of movable wheels (2-4) are arranged at the bottom of the lower layer desktop.

2. The convenient double deck load carrying cart of claim 1, wherein: the fixed desktop (2-1) of the lower desktop (2) and the fixed desktop (2-1) of the upper desktop (1) are symmetrical about the horizontal middle section centers of the two; the plurality of lifting devices (3) are uniformly arranged on two end faces of the two fixed desktops (2-1) which are not provided with the first movable desktop (2-2) and the second movable desktop (2-3); the locking devices (4) are divided into two groups and are respectively arranged between the upper layer desktop (1) and the lower layer desktop (2) close to the lifting devices (3) on the two sides.

3. The convenient double deck load carrying cart of claim 1, wherein: the first movable table top (2-2) comprises a first movable table top (2-2-2), the second movable table top (2-3) comprises a second movable table top (2-3-2), and the first movable table top (2-2-2) and the second movable table top (2-3-2) can move towards two opposite sides; the fixed desktop (2-1) comprises two cross beams (2-1-1) which are arranged in parallel, a fixed desktop (2-1) and longitudinal beams (2-1-2); the outer sides of the two beams (2-1-1) are provided with lifting devices (3), and a fixed table plate (2-1-3), a movable table plate I (2-2-2) and a movable table plate II (2-3-2) are arranged between the two beams (2-1-1); the lower surface of the fixed table plate (2-1-3) is provided with the longitudinal beam (2-1-2); the longitudinal beam (2-1-2) is positioned between the first movable table board (2-2-2) and the second movable table board (2-3-2).

4. A convenient double deck load carrying cart according to claim 3, wherein: the beam (2-1-1) is composed of a square-shaped pipe (2-1-1-2) and an L-shaped plate; the L-shaped plate and the upper surface of the mouth-shaped pipe (2-1-1-2) form a C-shaped opening (2-1-1-1), and the opening side of the C-shaped opening (2-1-1-1) is opposite to the side where the longitudinal beam (2-1-2) is located; a fixed table plate (2-1-3), a first movable table plate (2-2-2) and a second movable table plate (2-3-2) are sequentially arranged in the C-shaped opening (2-1-1-1) from top to bottom; the upper surface of the fixed table plate (2-1-3) is fixedly connected with the lower surface of the inner top of the C-shaped opening (2-1-1-1), and the first movable table plate (2-2-2) and the second movable table plate (2-3-2) can independently move in the C-shaped opening (2-1-1-1).

5. The convenient double deck load cart of claim 4, wherein: the mouth-shaped pipe (2-1-1-2) is connected with a first extension beam (2-2-1) and a second extension beam (2-3-1) in a sliding mode, and the first extension beam (2-2-1) and the second extension beam (2-3-1) can move along the moving direction of the first movable table top and the second movable table top respectively; the upper surface of one end, far away from the fixed table plate (2-1-3), of the extension beam I (2-2-1) is fixedly connected with the lower surface of one end, far away from the fixed table plate (2-1-3), of the movable table plate I (2-2-2) through a table plate cushion block I (2-2-4); the upper surface of one end, far away from the fixed table plate (2-1-3), of the extension beam II (2-3-1) is fixedly connected with the lower surface of one end, far away from the fixed table plate (2-1-3), of the movable table plate II (2-3-2) through a table plate cushion block II (2-3-4).

6. The convenient double deck load carrying cart of claim 1, wherein: the lifting device (3) comprises a lower lifting block (3-1), a guide rod (3-5), a guide sleeve (3-6) and an upper lifting block (3-7); the lower lifting block (3-1) is arranged on the lower layer desktop (2), and the upper lifting block (3-7) is fixed on the upper layer desktop (1); a guide rod (3-5) is fixedly arranged on the lower lifting block (3-1); the guide rod (3-5) is sleeved at the inner lower end of the guide sleeve (3-6), and the guide rod and the guide sleeve can move up and down relatively; the outer surface of the upper end of the guide sleeve (3-6) is sleeved with an upper lifting block (3-7), and the upper lifting block are rotationally connected; in all the lifting devices (3), the outer surface of a guide rod (3-5) of one lifting device (3) is provided with trapezoidal threads, the inner surface of a corresponding guide sleeve (3-6) is provided with trapezoidal threads, and a rotating handle (3-4) is arranged on the guide sleeve (3-6) above an upper lifting block (3-7); in all the lifting devices (3), except the lifting device (3) provided with the handle, the outer surfaces of the guide rods (3-5) of the other lifting devices (3) are connected with the inner surfaces of the guide sleeves (3-6) in a sliding manner.

7. The convenient double deck load carrying cart of claim 1, wherein: the locking device (4) comprises two linkages (4-1), an X-shaped bracket (4-2) and a locking device (4-3); the two linkages (4-1) are respectively and fixedly connected with the upper layer desktop (1) and the lower layer desktop (2), an X-shaped bracket (4-2) is arranged between the two linkages (4-1), and the X-shaped brackets (4-2) are hinged with each other; the locking device (4-3) is arranged at the intersection point of the X-shaped support (4-2) and can realize locking of the upper layer desktop (1) in the height direction.

8. The convenient double deck load cart of claim 7, wherein: the linkage device (4-1) comprises a linkage shell (4-1-1), and two sides of the linkage shell (4-1-1) are open; the linkage shell (4-1-1) is fixed on the upper layer desktop (1) or the lower layer desktop (2); a gear shaft (4-1-3) is arranged at the center in the linkage shell (4-1-1), and two sides of the gear shaft (4-1-3) are respectively connected with a rack of a linkage rod (4-1-2) in a meshing manner; the linkage rod (4-1-2) can slide in the linkage shell (4-1-1) and extend out of the linkage shell (4-1-1).

9. The convenient double deck load cart of claim 7, wherein: the locking device (4-3) comprises two fixed splints (4-3-1) and two wedge-shaped top rings (4-3-2); the outer sides of the two fixed splints (4-3-1) are respectively connected with an X-shaped bracket (4-2) through fasteners, and the inner sides of the two fixed splints (4-3-1) are respectively fixedly connected with a wedge-shaped top ring (4-3-2); the two wedge-shaped top rings (4-3-2) are a pair of circular rings with the central axes overlapped and in one-way rotation fit; the two wedge-shaped top rings (4-3-2) are oppositely arranged, and two opposite sides are provided, wherein one side is provided with a wedge-shaped clamping groove disc (4-3-3), and the other side is provided with a wedge-shaped clamping groove shaft (4-3-4); the wedge-shaped clamping groove disc (4-3-3) and the wedge-shaped clamping groove shaft (4-3-4) have the same wedge-shaped surface shape and are attached oppositely; one end part of the wedge-shaped clamping groove shaft (4-3-4) can penetrate through the wedge-shaped clamping groove disc (4-3-3) and the fixed clamping plate (4-3-1) installed on the wedge-shaped clamping groove shaft, the other end of the wedge-shaped clamping groove shaft sequentially penetrates through the wedge-shaped top ring (4-3-2) where the wedge-shaped clamping groove shaft is located and the fixed clamping plate (4-3-1) corresponding to the wedge-shaped top ring, and a handle (4-3-7) used for manual rotation is integrally formed at the end part of the wedge-shaped clamping; locking springs (4-3-5) are arranged between the two wedge-shaped top rings (4-3-2) and the corresponding fixed clamping plates (4-3-1).

10. The convenient double deck load cart of claim 5, wherein: a plurality of movable wheels (2-4) are uniformly arranged on the lower surfaces of the fixed table plates (2-1-3), the first extension beams (2-2-1) and the second extension beams (2-3-1) corresponding to the lower-layer table top (2).