CN111819967A

CN111819967A - Transfer trolley

Info

Publication number: CN111819967A
Application number: CN202010563719.1A
Authority: CN
Inventors: 吴劼; 姜东�; 丁艳锋; 周国栋
Original assignee: Nanjing Huitong Crop Phenotype Research Institute Co ltd; Nanjing Agricultural University
Current assignee: Nanjing Huitong Crop Phenotype Research Institute Co ltd; Nanjing Agricultural University
Priority date: 2020-06-19
Filing date: 2020-06-19
Publication date: 2020-10-27
Also published as: WO2021253604A1

Abstract

The invention relates to a transfer trolley which comprises a sub-trolley frame, a lifting assembly, a hook structure and a walking assembly, wherein the sub-trolley frame comprises a top plate and side plates, the top plate is rectangular, the side plates are arranged around the edge of the top plate in the vertical direction, the side plates and the top plate jointly enclose a sub-trolley frame with a containing groove, the hook structure is arranged on the lifting assembly, the lifting assembly and the walking assembly are arranged in the containing groove, and the lifting assembly can ascend or descend relative to the sub-trolley frame. The transfer trolley provided by the invention is arranged above the cultivation frame of the multilayer three-dimensional cultivation frame, the hook structure is arranged on the lifting component, and the lifting component can ascend or descend relative to the sub-trolley frame so as to finish automatic lifting of the irrigation device or the photographing device; the length direction that the walking subassembly can follow the three-dimensional cultivation frame of multilayer removes to drive irrigation equipment or the device of shooing carries out automatic irrigation or automatic shooting to the plant in the cultivation frame, and degree of automation is high, need not artifical climbing operation, provides work efficiency.

Description

Transfer trolley

Technical Field

The invention relates to a transfer device, in particular to a transfer trolley.

Background

Crop phenotypes require the need for high throughput, automated equipment to meet the needs of modern crop breeding. Traditional indoor crop is transplanted and transport, mainly relies on the manpower, and manual transport crop is irrigated, is added nutrient solution, is shot etc. operation back to the assigned position, and is in manual transport to original position, wastes time and energy, and is inefficient. The existing automatic transplanting device for some crops, such as the automatic transplanting device for young seedlings, drives a gear and a rack to engage a lifting bracket to vertically move along a side guide rail of an upright post through a servo speed reduction motor, and a cylinder telescopic rod drives a stacking frame to vertically move along a front guide rail of the upright post, so that the automatic control and the operation are simple. Automatic tray feeding device of pot seedling transplanter, servo motor drive transmission chain rotates, and the cave dish layer moves down to operating position, and on the conveyer belt glided automatically, the combined action through the dead weight of cave dish and conveyer belt made the cave dish to get seedling conveyor entrance, realized that the cave dish is automatic to be sent into and get seedling conveyor, degree of automation is high, stable in structure, mainly is applied to the transplantation of pot seedling. The fixed value transplanter completes the processes of slotting, filling soil and transplanting respectively through the slotting part, the soil falling part and the transplanting part, performs single field planting, assists with the transplanting paw and the compaction and punching integrated device, completes transplanting and punching compaction simultaneously, and achieves automatic completion of the transplanting process and stable structure. These transplanting devices stable in structure, degree of automation is high. But devices for flexible hooking, automated irrigation or handling of plants have not been known. Therefore, research and development of a transplanting device integrating a flexible hook structure and having high automation degree are urgently needed.

Disclosure of Invention

The invention overcomes the defects in the prior art and provides the transfer trolley which is integrated with a flexible hook structure, has high automation degree and can be used for automatic irrigation or photographing of plants.

The specific technical scheme of the invention is as follows:

the utility model provides a move and carry dolly, includes sub-car frame, lifting unit, couple structure and walking assembly, sub-car frame includes roof and curb plate, and the roof is the rectangle, and the curb plate sets up along vertical direction around the edge of roof, and curb plate and roof enclose jointly to have formed into the sub-car frame that holds the recess, and the couple structure is established on lifting unit, and lifting unit and walking assembly set up and lifting unit can rise or descend relatively sub-car frame in holding the recess.

Preferably, the walking assembly comprises a driving wheel, a driven wheel, a rotating shaft and a driving mechanism for driving the rotating shaft to rotate, and two ends of the rotating shaft are connected with the driving wheel; the rotating shaft and the driving mechanism are connected with the top plate, and the driving wheel and the driven wheel are arranged on the side plate.

Preferably, the driving wheels comprise two groups, the first group of driving wheels is sleeved at two ends of the rotating shaft, the rotating shaft is connected with an output shaft of the driving mechanism, and the second group of driving wheels is in transmission connection with the rotating shaft; the driven wheels comprise two groups, and the two groups of driven wheels are symmetrically arranged on two sides of the sub-vehicle frame.

Preferably, the lifting component comprises a supporting plate and a lifting device, a through hole is formed in the supporting plate, the hook structure is arranged in the through hole in the supporting plate, the lifting device drives the supporting plate to ascend or descend relative to the bicycle frame, and when the supporting plate ascends or descends relative to the bicycle frame, the hook structure moves between a retracted state and an opened state in which the hook structure can be used for hooking objects.

Preferably, the lifting device comprises a winch, a guide wheel, a fixed pulley, a movable pulley, a rope end fixing head and a steel wire rope, the winch, the guide wheel, the fixed pulley and the rope end fixing head are connected with the top plate, and the movable pulley is arranged in the middle of the supporting plate; one end of the steel wire rope is wound on a winding drum group of the winch, and the other end of the steel wire rope penetrates through the guide wheel, the fixed pulley and the movable pulley in sequence and then is fixed on the rope end fixing head.

Preferably, the lifting device further comprises two scissor units, the two scissor units are arranged on two sides of the supporting plate, the tops of the scissor units are connected with the top plate, and the bottoms of the scissor units are connected with the supporting plate; the winch drives the steel wire rope on the winding drum group to wind or unwind, so as to drive the two scissor units to synchronously ascend or descend.

Preferably, the hook structure comprises a balancing weight and a hook, the balancing weight is connected to the supporting plate in a sliding mode, the hook is connected with the balancing weight in a rotating mode, and when the supporting plate ascends or descends relative to the bicycle frame, the balancing weight slides along the supporting plate to enable the hook to move between a retracted state and an open state in which the hook can hook objects.

Preferably, a guide inclined plane is arranged on one side, close to the hook, of the counterweight block, a guide wheel is arranged above the guide inclined plane, the guide wheel is in contact with the guide inclined plane, and the support plate drives the guide wheel to move upwards or downwards along the guide inclined plane when ascending or descending relative to the bicycle frame, so that the hook moves between a retracted state and an open state in which the hook can be used for hooking objects; when the guide wheel moves to the bottom of the guide inclined plane, the hook is in a retracted state; when the guide wheel moves to the top of the guide inclined plane, the hook is in an open state capable of hooking objects by using the hook.

Preferably, be equipped with the connecting rod between balancing weight and the couple, the couple includes connecting portion and locates the hook portion of connecting portion one side, and the top of connecting portion is equipped with perpendicular with connecting portion and along the extension of hook portion direction both sides extension, and the one end and the balancing weight of connecting rod rotate to be connected, and the other end and the extension of connecting rod are located the tip fixed connection of hook portion one side, and the other end of extension rotates to be connected in the backup pad.

Preferably, the top of guide pulley sets up the gag lever post, is equipped with L shape support bar on the through-hole in the backup pad along its length direction's the both sides wall, and two L shape support bar symmetries set up, and the horizontal backup pad of L shape support bar is towards the through-hole center, forms the region of placing that is used for placing the extension between vertical board, the horizontal backup pad of two L shape support bars, and the other end of extension rotates to be connected on two L shape support bars.

The transfer trolley provided by the invention is arranged above the cultivation frame of the multilayer three-dimensional cultivation frame, the hook structure is arranged on the lifting component, and the lifting component can ascend or descend relative to the sub-trolley frame so as to finish automatic lifting of the irrigation device or the photographing device, and can be flexibly hooked; the length direction that the walking subassembly can follow the three-dimensional cultivation frame of multilayer removes to drive irrigation equipment or the device of shooing carries out automatic irrigation or automatic shooting to the plant in the cultivation frame, and degree of automation is high, need not artifical climbing operation, provides work efficiency. According to the invention, the lifting assembly, the hook structure and the walking assembly are integrated in the accommodating groove formed by enclosing the side plate and the top plate together, the system structure is light and simple, the operation is convenient and fast, and the efficiency is high.

Drawings

FIG. 1 is a schematic structural view of a multi-layer three-dimensional cultivation frame according to the present invention;

FIG. 2 is a schematic structural view of the transfer trolley of the present invention;

FIG. 3 is a schematic structural view of the sub-frame of the present invention;

FIG. 4 is a top view of FIG. 3;

FIG. 5 is a schematic structural view of the transfer cart of the present invention with the top plate removed;

FIG. 6 is a schematic view of the lifting assembly of the present invention;

FIG. 7 is a schematic structural view of the hook structure of the present invention;

FIG. 8 is a schematic view of the hook structure of the present invention in a retracted state;

FIG. 9 is a schematic structural view of the hook structure of the present invention in an open state;

fig. 10 is a schematic structural view of the hook structure of the present invention between a retracted state and an open state.

Detailed Description

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the objects, features and advantages of the invention can be more clearly understood. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the present invention, but are merely intended to illustrate the spirit of the technical solution of the present invention. The invention is not mentioned in part as prior art.

The transfer trolley is used for carrying irrigation devices or photographing devices on the multi-layer three-dimensional cultivation frame. Referring to fig. 1, the multi-layer three-dimensional cultivation frame comprises a plurality of cultivation frame units c arranged in parallel and used for placing cultivation frames a, slide rails b are arranged above the cultivation frame units c and located along the length direction of the cultivation frame units, and the transfer trolley is connected to the slide rails b in a sliding mode.

Referring to fig. 2 to 5, the transfer trolley comprises a sub-trolley frame 1, a lifting assembly, a hook structure 4 and a walking assembly 2, wherein the sub-trolley frame 1 comprises a top plate 1-1 and side plates 1-2, the top plate 1-1 is rectangular, the side plates 1-2 are arranged in the vertical direction around the edge of the top plate 1-1, the side plates 1-2 and the top plate 1-1 jointly enclose the sub-trolley frame 1 with accommodating grooves 1-6, the hook structure 4 is arranged on the lifting assembly, the lifting assembly and the walking assembly 2 are arranged in the accommodating grooves 1-6, and the lifting assembly can ascend or descend relative to the sub-trolley frame 1.

Further, referring to fig. 2 to 4, a supporting frame 1-3 is arranged below the top plate 1-1 in the accommodating groove 1-6 of the sub-vehicle frame 1 for enhancing the strength and rigidity of the top plate 1-1, the supporting frame 1-3 comprises two transverse frame bodies 1-5 arranged in parallel and a vertical frame body 1-4 arranged between the two transverse frame bodies 1-5, and the two transverse frame bodies 1-5 extend along the length direction of the top plate 1-1.

Further, referring to fig. 2 and 5, the walking assembly comprises a driving wheel, a driven wheel 2-6, a rotating shaft 2-1 and a driving mechanism 2-2 for driving the rotating shaft 2-1 to rotate, wherein two ends of the rotating shaft 2-1 are connected with the driving wheel; the rotating shaft 2-1 and the driving mechanism 2-2 are connected with the top plate 1-1, and the driving wheel and the driven wheel 2-6 are arranged on the side plate 1-2.

Further, referring to fig. 2 and 5, the driving wheels comprise two groups, a first group of driving wheels 2-3 is sleeved at two ends of the rotating shaft 2-1, the rotating shaft 2-1 is connected with an output shaft of the driving mechanism 2-2, and a second group of driving wheels 2-4 is in transmission connection with the rotating shaft 2-1; the driven wheels 2-6 comprise two groups, and the two groups of driven wheels 2-6 are symmetrically arranged on two sides of the sub-vehicle frame 1. The stability of the transfer trolley during advancing is enhanced by adopting two groups of driving wheels and two groups of driven wheels. The driving mechanism 2-2 is preferably a servo motor, an output shaft of the motor drives the rotating shaft 2-1 to rotate, the rotating shaft 2-1 drives the first group of driving wheels 2-3 at two ends of the rotating shaft to rotate, the rotating shaft 2-1 simultaneously drives the second group of driving wheels 2-4 to rotate through a gear pair (not shown in the figure), the first group of driving wheels 2-3 and the second group of driving wheels 2-4 transmit power to the two groups of driven wheels 2-6 after rotating, and the two groups of driven wheels 2-6 also rotate under the driving force of the first group of driving wheels 2-3 and the second group of driving wheels 2-4, so that the transfer trolley can move stably.

Further, referring to fig. 4 and 5, the four corners of the sub-vehicle frame 1 are provided with guide wheels 2-7 and a doubly-fed opposite-type photoelectric switch (not shown in the figures), the guide wheels 2-7 are arranged on the guide wheel frame, the doubly-fed opposite-type photoelectric switch (not shown in the figures) is used for collision avoidance, and the guide wheels 2-7 not only play a role in guiding, but also save more labor when the transfer trolley travels, and can reduce the power of the driving motor 2-2. The sub-vehicle frame 1 is also provided with a power box 5 which provides a power source for the whole transfer trolley; the outside of the sub-vehicle frame 1 is provided with a charging pile 6 for charging the transfer trolley. The sub-vehicle frame 1 is provided with a wiring groove 7 below the supporting frame 1-3, so that wiring can be conveniently carried out in the whole transfer trolley, and the shape of the wiring groove is matched with that of the supporting frame 1-3.

Further, referring to fig. 5 to 10, the lifting assembly includes a supporting plate 3-8 and a lifting device, the supporting plate 3-8 is provided with a through hole (not shown), the hook structure 4 is disposed in the through hole (not shown) of the supporting plate 3-8, the lifting device drives the supporting plate 3-8 to ascend or descend relative to the sub-vehicle frame 1, and when the supporting plate 3-8 ascends or descends relative to the sub-vehicle frame 1, the hook structure 4 moves between a retracted state and an open state in which it can be used to hook an object.

Further, referring to fig. 5 and 6, the lifting device comprises a winch 3-1, a guide wheel 3-2, a fixed pulley 3-3, a movable pulley 3-7, a rope end fixing head 3-4 and a steel wire rope (not shown in the figure), the winch 3-1, the guide wheel 3-2, the fixed pulley 3-3 and the rope end fixing head 3-4 are all connected with the top plate 1-1, and the movable pulley 3-7 is arranged in the middle of the supporting plate 3-8; one end of the steel wire rope is wound on a winding drum group of the winch 3-1, and the other end of the steel wire rope sequentially passes through the guide wheel 3-2, the fixed pulley 3-3 and the movable pulley 3-7 and then is fixed on the rope end fixing head 3-4.

Further, referring to fig. 5 and 6, the lifting device further comprises two scissor units 3-6, the two scissor units 3-6 are arranged on two sides of the support plate 3-8, the top of the scissor unit 3-6 is connected with the top plate 1-1, and the bottom of the scissor unit 3-6 is connected with the support plate 3-8; the winch 3-1 drives the steel wire rope on the winding drum group to wind or unwind, so that the two scissor units 3-6 are driven to synchronously ascend or descend, and the supporting plates 3-8 are also driven to ascend or descend. The scissor units 3-6 not only play a role in guiding, but also play a role in bearing the ascending or descending of the supporting plates 3-8; reinforcing ribs 3-9 are arranged below the supporting plates 3-8, so that the bearing effect of the supporting plates 3-8 is further enhanced. After adopting above-mentioned structure, lifting unit not only can bear great weight, and is more steady when going up and down moreover. And a pull rope encoder 3-5 is also arranged in the sub-vehicle frame 1 and used for monitoring the moving distance of the steel wire rope.

Further, referring to fig. 6 to 10, the number of the hook structures 4 is preferably 4, and the hook structures are symmetrically arranged on two sides of the support plate 3-8, and each hook structure 4 comprises a balancing weight 4-5 and a hook 4-1; the irrigation device or the photographing device is provided with a hanging ring matched with the hook 4-1. The counterweight block 4-5 is connected to the support plate 3-8 in a sliding mode, the linear sliding block 4-6 is arranged on the support plate 3-8, the counterweight block 4-5 is connected with the linear sliding block 4-6 through the guide rod 4-7, the hook 4-1 is connected with the counterweight block 4-5 in a rotating mode, when the support plate 3-8 ascends or descends relative to the sub-vehicle frame 1, the guide rod 4-7 moves linearly along the linear sliding block 4-6 to drive the counterweight block 4-5 to slide along the support plate 3-8, and therefore the hook 4-1 moves between a retracted state and an open state capable of being used for hooking things.

Further, referring to fig. 6 to 10, a guide inclined plane 4-8 is arranged on one side, close to the hook 4-1, of the counterweight block 4-5, a guide wheel 4-12 is arranged above the guide inclined plane 4-8, the guide wheel 4-12 is in contact with the guide inclined plane 4-8, and when the support plate 3-8 ascends or descends relative to the sub-vehicle frame 1, the guide wheel 4-12 is driven to move upwards or downwards along the guide inclined plane 4-8, so that the hook 4-1 moves between a retracted state and an open state in which the hook can be used for hooking things; when the hook 4-1 is in a retracted state, the guide wheel 4-12 is positioned at the bottom of the guide inclined plane 4-8, and when the hook 4-1 is in an opened state in which the hook can be used for hooking things, the guide wheel 4-12 is positioned at the top of the guide inclined plane 4-8.

Further, referring to fig. 6 to 10, a connecting rod 4-13 is arranged between the counterweight 4-5 and the hook 4-1, the hook 4-1 comprises a connecting portion 4-14 and a hook portion 4-15 arranged on one side of the connecting portion 4-14, an extending portion 4-4 perpendicular to the connecting portion 4-14 and extending along two sides of the direction of the hook portion 4-15 is arranged on the top of the connecting portion 4-14, one end of the connecting rod 4-13 is rotatably connected with the counterweight 4-5, the other end of the connecting rod 4-13 is fixedly connected with the end portion of the extending portion 4-4 located on one side of the hook portion 4-15, and the other end of the extending portion 4-4 is rotatably connected with the supporting plate 3-8.

Further, referring to fig. 6 to 10, the upper part of the guide wheel 4-12 is connected with the top plate 1-1 through a limiting rod, the limiting rod comprises an upper limiting rod 4-10, a support table 4-11 and a lower limiting rod 4-9, the top of the upper limiting rod 4-10 is connected with the top plate 1-1, the bottom of the upper limiting rod 4-10 is connected with one end of the support table 4-11, the other end of the support table 4-11 is connected with the top of the lower limiting rod 4-9, the guide wheel 4-12 is rotatably connected with the bottom of the lower limiting rod 4-9, and the support table 4-11 is positioned right below the two transverse frame bodies 1-5 and the wiring groove 7; the winch 3-1 drives the supporting plate 3-8 to ascend, and when the supporting plate 3-8 ascends to a certain position, the supporting table 4-11 is abutted against the wiring groove 7 to prevent the supporting plate 3-8 from further ascending relative to the sub-vehicle frame 1, so that parts in the accommodating grooves 1-6 of the sub-vehicle frame 1 are damaged. The limiting rod limits the height of the guide wheel 4-12, so that the hook 4-1 is in a retracted state when the supporting plate 3-8 is lifted to the right position relative to the sub-vehicle frame 1, namely when the guide wheel 4-12 just moves to the bottom of the guide inclined surface 4-8; when the supporting plate 3-8 descends relative to the sub-vehicle frame 1, the guide wheel 4-12 moves upwards along the guide inclined surface 4-8, at the moment, the hook 4-1 is gradually opened under the action of gravity until the supporting plate 3-8 descends to the proper position relative to the sub-vehicle frame 1, namely, the guide wheel 4-12 moves to the top of the guide inclined surface 4-8, and at the moment, the hook 4-1 is in an open state capable of hooking objects by using the hook. When the transfer trolley does not work, the hooks 4-1 are folded in the supporting plates 3-8, the structure is compact, and the occupied space of the transfer trolley is saved.

Further, referring to fig. 6 to 10, L-shaped support strips 4-3 are arranged on two side walls of the through hole in the support plate 3-8 along the length direction of the through hole, the two L-shaped support strips 4-3 are symmetrically arranged, the transverse support plate 4-2 of the L-shaped support strip 4-3 faces the center of the through hole, a placement area for placing the extension part 4-4 is formed between the vertical plate and the transverse support plate 4-2 of the two L-shaped support strips 4-3, and the other end of the extension part 4-4 is rotatably connected to the two L-shaped support strips 4-3. The transverse supporting plate 4-2 of the two L-shaped supporting strips 4-3 is used for supporting the extending part 4-4 of the hook 4-1, the opening state of the hook 4-1 is limited, and when the hook 4-1 hooks objects, the hook 4-1 continues to move downwards under the action of gravity and the objects, so that the hooked objects are unhooked.

The present invention has been described with reference to the above embodiments, and the structure, arrangement, and connection of the respective members may be changed. On the basis of the technical scheme of the invention, the improvement or equivalent transformation of the individual components according to the principle of the invention is not excluded from the protection scope of the invention.

Claims

1. The utility model provides a move and carry dolly, its characterized in that includes sub-car frame, lifting unit, couple structure and walking subassembly, sub-car frame includes roof and curb plate, and the roof is the rectangle, and the curb plate sets up along vertical direction around the edge of roof, and curb plate and roof enclose jointly to have formed with the sub-car frame that holds the recess, and the couple structure is established on lifting unit, and lifting unit and walking subassembly set up and lifting unit can rise or descend relatively sub-car frame in holding the recess.

2. The transfer trolley according to claim 1, wherein the traveling assembly comprises a driving wheel, a driven wheel, a rotating shaft and a driving mechanism for driving the rotating shaft to rotate, and two ends of the rotating shaft are connected with the driving wheel; the rotating shaft and the driving mechanism are connected with the top plate, and the driving wheel and the driven wheel are arranged on the side plate.

3. The transfer cart according to claim 2, wherein the driving wheels comprise two sets, a first set of driving wheels is sleeved on two ends of a rotating shaft, the rotating shaft is connected with the output shaft of the driving mechanism, and a second set of driving wheels is in transmission connection with the rotating shaft; the driven wheels comprise two groups, and the two groups of driven wheels are symmetrically arranged on two sides of the sub-vehicle frame.

4. A transfer trolley according to any one of claims 1 to 3, wherein the lifting assembly comprises a support plate, a lifting device, the support plate is provided with a through hole, the hook structure is arranged in the through hole of the support plate, the lifting device drives the support plate to ascend or descend relative to the trolley frame, and when the support plate ascends or descends relative to the trolley frame, the hook structure moves between a retracted state and an open state in which the hook structure can be used for hooking objects.

5. The transfer trolley according to claim 4, wherein the lifting device comprises a winch, a guide wheel, a fixed pulley, a movable pulley, a rope end fixing head and a steel wire rope, the winch, the guide wheel, the fixed pulley and the rope end fixing head are connected with the top plate, and the movable pulley is arranged in the middle of the supporting plate; one end of the steel wire rope is wound on a winding drum group of the winch, and the other end of the steel wire rope penetrates through the guide wheel, the fixed pulley and the movable pulley in sequence and then is fixed on the rope end fixing head.

6. The transfer trolley according to claim 5, wherein the lifting device further comprises two scissor units, the two scissor units are arranged on two sides of the support plate, the top of the scissor unit is connected with the top plate, and the bottom of the scissor unit is connected with the support plate; the winch drives the steel wire rope on the winding drum group to wind or unwind, so as to drive the two scissor units to synchronously ascend or descend.

7. A transfer cart as claimed in claim 4, wherein said hook structure comprises a weight, a hook, the weight is slidably connected to a support plate, the hook is pivotally connected to the weight, the support plate is adapted to slide along the support plate when the support plate is raised or lowered relative to the cart frame to move the hook between a stowed position and an open position in which it can be used to hook an object.

8. The transfer trolley as claimed in claim 7, wherein a guide slope is provided on a side of the counterweight block close to the hook, a guide wheel is provided above the guide slope, the guide wheel is in contact with the guide slope, and the support plate drives the guide wheel to move up or down along the guide slope when the subframe ascends or descends, so that the hook moves between a retracted state and an open state in which the hook can be used to hook things; when the guide wheel moves to the bottom of the guide inclined plane, the hook is in a retracted state, and when the guide wheel moves to the top of the guide inclined plane, the hook is in an open state capable of hooking objects by using the hook.

9. The transfer cart as claimed in claim 8, wherein a connecting rod is provided between the weight member and the hook, the hook comprises a connecting portion and a hook portion provided on one side of the connecting portion, the top of the connecting portion is provided with an extending portion perpendicular to the connecting portion and extending along both sides of the hook portion, one end of the connecting rod is rotatably connected to the weight member, the other end of the connecting rod is fixedly connected to the end of the extending portion on one side of the hook portion, and the other end of the extending portion is rotatably connected to the supporting plate.

10. The transfer trolley as claimed in claim 9, wherein a limiting rod is disposed above the guide wheel, L-shaped support bars are disposed on two side walls of the through hole in the support plate along the length direction of the through hole, the two L-shaped support bars are symmetrically disposed, the transverse support plate of the L-shaped support bar faces the center of the through hole, a placement area for placing the extension portion is formed between the vertical plate and the transverse support plate of the two L-shaped support bars, and the other end of the extension portion is rotatably connected to the two L-shaped support bars.