Elevator for loading and unloading goods on truck carrier

Abstract

The utility model discloses a lifting machine for loading and unloading goods on a truck carrier. The lifting machine comprises a fixing frame, a loading mechanism and a lifting mechanism, guide rails arranged in the height direction of the fixing frame are fixed to the two opposite sides of the fixing frame. The carrying mechanism comprises a bearing frame which is arranged in the frame body of the fixing frame and can slide up and down along the guide rails. The lifting mechanism comprises a hydraulic cylinder, a fixing plate, a transmission shaft, a chain wheel and a chain. A cylinder body of the hydraulic cylinder is fixed to the bottom end of the fixing frame. The bottom surface of the fixing plate is fixed with a piston rod of the hydraulic cylinder; the transmission shaft is perpendicular to the guide rail and is rotatably connected to the top surface of the fixed plate; the chain wheel is fixed at the end of the transmission shaft; and two ends of the chain are respectively fixed with the side wall of the fixed frame and the top surface of the bearing frame so as to lift the bearing frame. Hydraulic drive is utilized, load is large, operation is stable, the loading mechanism can enable the cattle carrying vehicle to be in butt joint with a conveying line in a warehousing system conveniently through the effect of the lifting mechanism, and the working intensity of operators is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of intelligent warehousing goods transportation, and more specifically, to a hoist for loading and unloading goods on a pallet truck. Background Technique

[0002] In an intelligent warehousing system, the inbound and outbound of goods is the most basic link, and its basic process is to place the pallet goods on the inbound conveyor or take them off the conveyor. Currently, pallet trucks are usually used to transport goods in the intelligent warehousing system.

[0003] A pallet truck (also known as a forklift, a handling truck, and a pallet truck) is one of the commonly used manual transportation tools. It has a small volume, a large load capacity, and is easy to move. It is widely used in the handling of goods such as equipment, boxes, and pallets. However, because the pallet truck is an independent tool and the height of its rise and fall is small, it can only carry and transport close to the ground during handling. If you want to move the goods from the pallet truck to a high platform or conveyor line, or move the goods from a high platform or conveyor line to the pallet truck, it is relatively difficult.

[0004] However, the conveying surface of the general conveyor in the intelligent warehousing system is 700 - 800 mm. Therefore, there will be a height difference when using a pallet truck to transport goods. If the warehouse is not equipped with a forklift, a device is needed to solve the problem of the height difference in loading and unloading goods.

[0005] Therefore, how to provide a hoist for loading and unloading goods on a pallet truck, which can facilitate seamless docking between the pallet truck and any conveyor line in the intelligent warehousing system, and reduce the workload and working intensity of the operators, is an urgent problem to be solved by those skilled in the art. Content of the Utility Model

[0006] In view of this, the utility model provides a hoist for loading and unloading goods on a pallet truck, aiming to solve the above technical problems.

[0007] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0008] A hoist for loading and unloading goods on a pallet truck includes a fixed frame, a load-carrying mechanism, and a lifting mechanism;

[0009] A plurality of guide rails arranged along the height direction thereof are fixed on both opposite sides of the fixed frame;

[0010] The load-carrying mechanism includes a carrying frame, and the carrying frame is arranged in the fixed frame and can slide up and down along the plurality of guide rails;

[0011] The lifting mechanism includes a hydraulic cylinder, a fixing plate, a transmission shaft, a sprocket and a chain. The cylinder block of the hydraulic cylinder is fixed to the bottom end of the fixing frame, and its piston rod is arranged parallel to the guide rail. The bottom surface of the fixing plate is fixed to the piston rod of the hydraulic cylinder. The transmission shaft is arranged perpendicular to the guide rail and is rotatably connected to the top surface of the fixing plate. The sprocket is fixed to the end of the transmission shaft. The chain bypasses the sprocket and its two ends are respectively fixed to the side wall of the fixing frame and the top surface of the carrier frame to lift the carrier frame.

[0012] The beneficial effect of the above technical solution is that when the goods are placed on the loading mechanism of the pallet truck, the piston rod of the hydraulic cylinder extends to drive the fixing plate to move upward. At this time, since the ends of the chain are fixed to the carrier frame and the fixing frame, when the fixing plate moves upward, the chain will cause the sprocket to make a driven movement. Then, as the piston rod extends, the chain will pull the carrier frame upward. When the loading mechanism is docked with the conveyor line of the goods, the operation of changing the layer of the goods can be completed.

[0013] Preferably, the lifting mechanism further includes a support seat and a support rod.

[0014] The support seat is fixed to the top end of the cylinder block of the hydraulic cylinder. Both ends of the top surface of the support seat are provided with sliding holes. There are two support rods which are slidably connected in the sliding holes. The top ends of the two support rods are respectively fixed to both ends of the bottom surface of the fixing plate.

[0015] The two support rods and the piston rod of the hydraulic cylinder are in the same plane.

[0016] The beneficial effect of the above technical solution is that the fixing plate is jointly supported by the support seat and the support rod in cooperation with the piston rod of the hydraulic cylinder, ensuring the stability of the fixing plate during the up and down movement and preventing the occurrence of tilting and instability.

[0017] Preferably, a limit ring is fixed to the bottom end of each of the two support rods. The limit ring limits the sliding of the support rod to prevent it from sliding out of the support seat.

[0018] Preferably, bearing seats are fixed to both ends of the top surface of the fixing plate. A ball bearing is embedded in the bearing seat. The outer wall of the transmission shaft is fitted with the inner rings of the two ball bearings. The rotation of the transmission shaft is realized through the ball bearings, and then the sprocket is driven to make a driven rotation, so that the chain pulls the carrier frame to move up and down along the guide rail.

[0019] Preferably, a plurality of sliders are fixed to both ends of the top surface of the carrier frame. The plurality of sliders are respectively slidably connected to a plurality of the guide rails. The up and down movement of the carrier frame along the guide rail is realized by the sliding of the sliders along the guide rails.

[0020] Preferably, a limiting block is slidably connected above the slider corresponding to the guide rail. The limiting block can limit the displacement of the slider and prevent it from sliding out of the guide rail.

[0021] Preferably, a roller conveyor is rotatably connected between the top surfaces of the plurality of sliders on the bearing frame. There are two roller conveyors which are symmetrically arranged; a groove for accommodating a pallet truck is formed between the opposite side walls of the two roller conveyors, and a positioning baffle is provided at the conveying end thereof. The two ends of the positioning baffle are respectively fixed to the side walls of the two roller conveyors; a ramp bracket is fixed to the outer side wall of the bearing frame relative to the positioning baffle so that the pallet truck can enter the cavity of the groove. The pallet truck enters the groove through the ramp bracket. When it touches the positioning baffle, it means that the goods have been conveyed in place. At this time, the pallet truck places the goods on the rollers of the roller conveyor, moves the pallet truck away from the hoist, and then starts the hydraulic cylinder. The bearing frame drives the goods to move upward. When the roller conveyor is docked with the conveying structure of the conveying line, the goods waybill arrives in place, and the roller conveyor starts to convey the goods, completing a conveying operation of the goods.

[0022] Preferably, guide plates are provided on the outer sides of the two roller conveyors relative to the groove. The length direction of the guide plates is parallel to the conveying direction of the roller conveyors and is fixed to the top surface of the bearing frame; the panel of the guide plates is located above the roller conveyors. The guide plates can guide the pallet truck to ensure that the pallet under the goods can completely fall on the rollers of the roller conveyor.

[0023] Preferably, a first chain fixing rod is fixed to the top surface of the bearing frame relative to the sprocket, a cross bar is fixed to the side wall of the fixing frame relative to the guide rail, and a second chain fixing rod is fixed to the top surface of the cross bar relative to the sprocket. The chain bypasses the sprocket and its two ends are respectively fixed to the first chain fixing rod and the second chain fixing rod. The two ends of the chain are fixed to the bearing frame and the cross bar on the fixing frame through the fixing rods. When the piston rod of the hydraulic cylinder extends, the end of the chain fixed to the fixing frame does not move. As the hydraulic pressure increases, the sprocket makes a driven movement, and the end of the chain fixed to the bearing frame will pull the bearing frame upward to realize the lifting and layer-changing operation of the goods.

[0024] Preferably, two sets of lifting mechanisms are provided and are respectively arranged on both sides of the fixing frames corresponding to the plurality of guide rails. The double-sided hydraulic lifting mechanism has sufficient load and can ensure the stable operation of the hoist.

[0025] As can be seen from the above technical solutions, compared with the prior art, the present utility model discloses a hoist for loading and unloading goods on a pallet truck, which is hydraulically driven, has a large load capacity and operates smoothly. The load-carrying mechanism can be seamlessly docked with any conveyor line in the intelligent warehousing system through the action of the lifting mechanism, reducing the workload and working intensity of operators. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0027] Figure 1 Structural schematic diagram of the hoist provided by the present utility model;

[0028] Figure 2 For Figure 1 Enlarged schematic diagram of part A in

[0029] Figure 3 Structural schematic diagram of the load-carrying mechanism provided by the present utility model;

[0030] Figure 4 Structural schematic diagram of the lifting structure provided by the present utility model.

[0031] Among them,

[0032] 1 - fixed frame; 11 - guide rail; 12 - limit block; 13 - second chain fixing rod;

[0033] 2 - lifting mechanism; 21 - hydraulic cylinder; 22 - fixing plate; 23 - transmission shaft; 24 - sprocket; 25 - chain; 26 - support seat; 27 - support rod; 28 - limit ring;

[0034] 3 - load-carrying mechanism; 31 - bearing frame; 32 - roller conveyor; 33 - in-place baffle; 34 - guide plate; 35 - first chain fixing rod; 36 - slider. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0036] See attachedFigures 1 to 4 , an embodiment of the present utility model discloses a hoist for loading and unloading goods on a pallet truck, which includes a fixed frame 1, a load-carrying mechanism 3 and a lifting mechanism 2;

[0037] On both opposite sides of the fixed frame 1, a plurality of guide rails 11 arranged along its height direction are fixed;

[0038] The load-carrying mechanism 3 includes a carrying frame 31, and the carrying frame 31 is arranged inside the fixed frame 1 and can slide up and down along the plurality of guide rails 11;

[0039] The lifting mechanism 2 includes a hydraulic cylinder 21, a fixing plate 22, a transmission shaft 23, a sprocket 24 and a chain 25. The cylinder body of the hydraulic cylinder 21 is fixed at the bottom end of the fixed frame 1, and its piston rod is arranged parallel to the guide rail 11; the bottom surface of the fixing plate 22 is fixed to the piston rod of the hydraulic cylinder 21; the transmission shaft 23 is arranged perpendicular to the guide rail 11 and is rotatably connected to the top surface of the fixing plate 22, and the sprocket 24 is fixed to the end of the transmission shaft 23; the chain 25 bypasses the sprocket 24 and its two ends are respectively fixed to the side wall of the fixed frame 1 and the top surface of the carrying frame 31 to lift the carrying frame 31.

[0040] To further optimize the above technical solution, two groups of lifting mechanisms 2 are provided and are respectively arranged on both sides of the fixed frame 1 corresponding to the plurality of guide rails 11.

[0041] As Figure 1 shown, the fixed frame is a frame structure, there are four guide rails, the guide rails are arranged vertically and are symmetrically arranged in pairs on the opposite side frames of the fixed frame, the hydraulic cylinders are also arranged vertically, the cylinder bodies are fixed at the bottom end of the fixed frame, and the two hydraulic cylinders are symmetrically arranged on the same side of the fixed frame relative to the guide rails. When the hoist needs to be lifted upward, the piston rods of the hydraulic cylinders extend to drive the fixing plate to move upward. During the movement of the fixing plate, due to the action of the chain, the transmission shaft will rotate. During the rotation of the transmission shaft, the sprocket will do a driven movement. Also, since both ends of the chain are fixed, during the synchronous upward movement of the fixing plate and the sprocket, the chain will pull the carrying frame to slide upward along the guide rail. When the carrying frame is docked with the conveyor line, the goods can be lifted and conveyed.

[0042] To further optimize the above technical solution, improve the stability of the fixing plate during movement, and prevent tilting and instability, the lifting mechanism 2 further includes a support seat 26 and a support rod 27;

[0043] The support seat 26 is fixed at the top end of the cylinder body of the hydraulic cylinder 21. Both ends of the top surface of the support seat 26 are provided with sliding holes, and there are two support rods 27 which are slidably connected in the sliding holes, and the top ends of the two support rods 27 are respectively fixed to both ends of the bottom surface of the fixing plate 22;

[0044] The two support rods 27 and the piston rod of the hydraulic cylinder 21 are located in the same plane.

[0045] As Figure 4As shown, the panel of the fixed plate is horizontally arranged, the piston rod and the support rod are vertically arranged, the piston rod is vertically fixed in the middle of the bottom surface of the fixed plate, and the two support rods are respectively vertically fixed at both ends of the bottom surface of the fixed plate. The two support rods and the piston rod are in the same vertical plane, and the fixed plate is supported by the piston rod and the two support rods together; when the piston rod performs telescopic operation, the support rod can slide up and down synchronously along the support seat, realizing the synchronous support and up and down movement of the piston rod and the support rod.

[0046] To further optimize the above technical solution and limit the displacement height of the support rod to prevent it from sliding out of the support seat, limit rings 28 are fixed at the bottom ends of the two support rods 27.

[0047] To further optimize the above technical solution and better realize the driven rotation of the sprocket, bearing seats are fixed at both ends of the top surface of the fixed plate 22. Ball bearings are embedded in the bearing seats, and the outer wall of the transmission shaft 23 is fitted with the inner rings of the two ball bearings.

[0048] To further optimize the above technical solution and ensure that the carrier can slide up and down effectively along the guide rail, a plurality of sliders 36 are fixed at both ends of the top surface of the carrier 31, and the plurality of sliders 36 are slidably connected to the plurality of guide rails 11 one by one.

[0049] To further optimize the above technical solution and limit the sliding height of the carrier, a limit block 12 is slidably connected above the slider 36 corresponding to the guide rail 11.

[0050] As Figure 1 and 2 shown, there are four sliders which are respectively arranged at the four corners of the top surface of the carrier and are slidably connected to the four guide rails one by one. The bottom ends of the sliders are fixed to the top surface of the carrier by bolts. The sliding of the sliders along the guide rails drives the sliding of the carrier. The limit block is slidably connected to the guide rail synchronously and is located above the slider. When the slider slides to the top end of the guide rail, the limit block is between the slider and the top end of the guide rail, which can block the continuous upward sliding of the slider and prevent the slider from falling off.

[0051] In this embodiment, a first chain fixing rod 35 is fixed to the top surface of the carrier 31 relative to the sprocket 24, a cross bar is fixed to the side wall of the fixed frame 1 relative to the guide rail 11, a second chain fixing rod 13 is fixed to the top surface of the cross bar relative to the sprocket 24, and the chain 25 bypasses the sprocket 24 and its two ends are respectively fixed to the first chain fixing rod 35 and the second chain fixing rod 13.

[0052] The chain passes over the sprocket, with one end fixed to the crossbar of the fixed frame and the other end fixed to the bearing frame. Since the crossbar is fixedly connected to the fixed frame and the bearing frame is slidably connected to the fixed frame through a guide rail, when the sprocket drives the chain to move upward synchronously, the chain can pull the bearing frame to move downward along the guide rail of the fixed frame, and vice versa. It is driven by a hydraulic cylinder to realize the up and down movement of the bearing frame, and thus the lifting of goods can be achieved.

[0053] To further optimize the above technical solution, roller conveyors 32 are rotatably connected between the top surfaces of the bearing frame 31 relative to multiple sliders 36. There are two roller conveyors 32 and they are symmetrically arranged; a groove for accommodating a pallet jack is formed between the opposite side walls of the two roller conveyors 32, and a positioning baffle 33 is provided at the conveying end thereof. The two ends of the positioning baffle 33 are respectively fixed to the side walls of the two roller conveyors 32; a ramp bracket 4 is fixed to the outer side wall of the bearing frame 31 relative to the positioning baffle 33 so that the pallet jack can enter the cavity of the groove.

[0054] As Figure 3 shown, there are two roller conveyors. A driving roller is provided at the end of the conveying directions of the two roller conveyors. The driving roller connects two roller conveyor frames. By electrically driving the driving roller to rotate, the rollers on the two roller conveyors are driven to rotate; a groove is formed between the two roller conveyors, and a positioning baffle is fixed to the side wall at the conveying end. A photoelectric switch is provided on the positioning baffle. When the pallet jack transports the goods to the roller conveyor through a pallet, the pallet jack enters the groove between the two roller conveyors through the ramp bracket. After triggering the photoelectric switch of the positioning baffle, it means that it has moved into place. The goods are lowered and the pallet is placed on the rollers of the roller conveyor and then leaves the elevator. The hydraulic cylinder is started, and the bearing frame carries the pallet and the goods to move upward. When the roller conveyor is docked with the conveyor line, the driving roller is started, and the roller conveyor transports the pallet and the goods to the conveyor line to complete the lifting and transportation of the goods.

[0055] To further optimize the above technical solution and ensure that the pallet jack places the pallet and the goods on the rollers of the roller conveyor in an orderly manner, guide plates 34 are provided on the outer sides of the two roller conveyors 32 relative to the groove. The length direction of the guide plates 34 is parallel to the conveying direction of the roller conveyors 32 and is fixed to the top surface of the bearing frame 31; the panel of the guide plates 34 is located above the roller conveyors 32.

[0056] The guide plates are fixed to the bearing frame through support columns. The guide plates are located between the first connecting fixed rod and the roller conveyor, which does not affect the movement of the chain and can also guide the pallet and the goods to effectively fall on the rollers of the roller conveyor.

[0057] In the present specification, the various embodiments are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same or similar parts among the various embodiments, reference can be made to each other. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple. For the relevant parts, reference can be made to the description in the method section.

[0058] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A hoist for loading and unloading goods on a pallet truck, characterized in that, It includes a fixing frame (1), a loading mechanism (3) and a lifting mechanism (2); On both opposite sides of the fixing frame (1), a plurality of guide rails (11) arranged along its height direction are fixed; The loading mechanism (3) includes a loading frame (31), and the loading frame (31) is arranged inside the fixing frame (1) and can slide up and down along the plurality of guide rails (11); The lifting mechanism (2) includes a hydraulic cylinder (21), a fixing plate (22), a transmission shaft (23), a sprocket (24) and a chain (25). The cylinder body of the hydraulic cylinder (21) is fixed at the bottom end of the fixing frame (1), and its piston rod is arranged parallel to the guide rail (11); the bottom surface of the fixing plate (22) is fixed to the piston rod of the hydraulic cylinder (21); the transmission shaft (23) is arranged perpendicular to the guide rail (11) and is rotatably connected to the top surface of the fixing plate (22), and the sprocket (24) is fixed to the end of the transmission shaft (23); the chain (25) bypasses the sprocket (24) and its two ends are respectively fixed to the side wall of the fixing frame (1) and the top surface of the loading frame (31) to lift the loading frame (31).

2. The elevator for loading and unloading a pallet truck according to claim 1, characterized in that The lifting mechanism (2) further includes a support seat (26) and a support rod (27); The support seat (26) is fixed to the top end of the cylinder body of the hydraulic cylinder (21). Sliding holes are formed at both ends of the top surface of the support seat (26). There are two support rods (27) which are slidably connected in the sliding holes, and the top ends of the two support rods (27) are respectively fixed to both ends of the bottom surface of the fixing plate (22); The two support rods (27) and the piston rod of the hydraulic cylinder (21) are located in the same plane.

3. The elevator for loading and unloading goods on a pallet truck according to claim 2, characterized in that, Limit rings (28) are fixed to the bottom ends of the two support rods (27).

4. A hoist for loading and unloading a pallet truck, according to claim 2, wherein, Bearing seats are fixed to both ends of the top surface of the fixing plate (22). Ball bearings are embedded in the bearing seats, and the outer wall of the transmission shaft (23) is fitted with the inner rings of the two ball bearings.

5. A hoist for loading and unloading a pallet truck, according to claim 1, wherein, A plurality of sliders (36) are fixed to both ends of the top surface of the loading frame (31), and the plurality of sliders (36) are slidably connected to the plurality of guide rails (11) in a one-to-one correspondence.

6. The elevator for loading and unloading a pallet truck according to claim 5, characterized in that, A limit block (12) is slidably connected above the slider (36) corresponding to the guide rail (11).

7. The elevator for loading and unloading goods on a pallet truck according to claim 5, characterized in that, A roller conveyor (32) is rotatably connected between the opposite side walls of the top surface of the loading frame (31) relative to the plurality of sliders (36). There are two roller conveyors (32) which are symmetrically arranged; a groove for accommodating a pallet truck is formed between the opposite side walls of the two roller conveyors (32), and a positioning baffle (33) is provided at the conveying end thereof. The two ends of the positioning baffle (33) are respectively fixed to the side walls of the two roller conveyors (32); a ramp bracket (4) is fixed to the outer side wall of the loading frame (31) relative to the positioning baffle (33) so that the pallet truck can enter the cavity of the groove.

8. A hoist for loading and unloading a pallet truck, according to claim 7, characterized in that On the outer sides of the two drum conveyors (32) relative to the groove, there are guide plates (34). The length direction of the guide plates (34) is parallel to the conveying direction of the drum conveyors (32) and is fixed on the top surface of the carrier frame (31); the panel of the guide plates (34) is located above the drum conveyors (32).

9. A hoist for loading and unloading a pallet truck as claimed in claim 1, wherein, On the top surface of the carrier frame (31) relative to the sprocket (24), there is a first chain fixing rod (35). On the side wall of the fixing frame (1) relative to the guide rail (11), there is a cross bar. On the top surface of the cross bar relative to the sprocket (24), there is a second chain fixing rod (13). The chain (25) bypasses the sprocket (24) and its two ends are respectively fixed to the first chain fixing rod (35) and the second chain fixing rod (13).

10. The elevator for loading and unloading a pallet truck according to claim 1, characterized in that, There are two sets of lifting mechanisms (2) and they are respectively arranged on both sides of the fixing frame (1) corresponding to multiple guide rails (11).

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