Electric fork truck with weighing function

Abstract

The application discloses a kind of electric fork trucks with weighing function, specifically relates to electric fork truck equipment technical field, including fork truck body and tray, the inner cavity middle part of two described installation slot one is provided with transmission device, the outer surface both sides of transmission device are provided with driven device, the inner cavity both sides of two described installation slot two are provided with support device.The electric fork truck with weighing function described in the application is provided with support device, which is driven by the transmission device and the driven device to extend, so that the support device limits and supports the tray, avoids the generation of cargo inclination phenomenon, affects the weighing of goods by electronic scale, and at the same time, in the process of fork truck body carrying goods, the support device on both sides can continuously limit and support the tray, which can greatly avoid the shaking generated in the process of carrying goods, resulting in the tray shaking and the cargo on the upper end falling.

Description

Technical Field

[0001] This invention relates to the field of electric forklift equipment technology, and in particular to an electric forklift with weighing function. Background Technology

[0002] Electric forklifts are dual-purpose vehicles for high-lift loading and unloading as well as short-distance transportation, and because they do not use fuel, they are particularly suitable for loading, unloading, and transporting goods in various workshops, warehouses, and freight yards. Electric forklifts are characterized by balanced lifting, flexible turning, and ease of operation, and are therefore widely used in the manufacturing industry.

[0003] Chinese patent document CN215439517U discloses an electric forklift with weighing function. The device is easy to steer, has stable walking and steering, and can accurately weigh the weight of the forked items. However, in actual use, when transporting goods, electric forklifts mostly insert the stretcher into the pallet and then transport them. But there is a certain gap between the stretcher and the pallet. During the forklift transportation process, the forklift may experience bumps, causing the goods to shake or even tip over. Summary of the Invention

[0004] The main objective of this invention is to provide an electric forklift with a weighing function, which can effectively solve the problem that there is a certain gap between the pallet and the pallet, and the forklift may shake during transportation, causing the goods to sway or even tip over.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: an electric forklift with weighing function, comprising a forklift body and a pallet, wherein two stretchers are provided on the front side of the forklift body, both stretchers being inserted into the lower part of the pallet, and mounting groove 1 is provided on the side of the upper end of the two stretchers that are close to each other, and mounting groove 2 is provided on the side of the outer surface of the two stretchers that are far from each other, wherein lifting mechanisms are provided on both sides of the inner cavity of the two mounting grooves 1, and electronic scales are provided on the upper part of the two lifting mechanisms located in the same inner cavity of the mounting groove 1, and support plates 1 are provided on the upper end of the two electronic scales, wherein a transmission device is provided in the middle of the inner cavity of the two mounting grooves 1, and driven devices are provided on both sides of the outer surface of the transmission device, and support devices are provided on both sides of the inner cavity of the two mounting grooves 2.

[0006] Preferably, the transmission device includes a telescopic plate and a cylinder. The cylinder is fixedly installed on the upper end of the telescopic plate. A gear is provided in the middle of the upper end of the telescopic plate. Both sides of the outer surface of the gear are meshed with racks. Both racks are slidably installed on the upper end of the telescopic plate. The outer surface of the rack on one side, away from the gear, is fixedly connected to the output end of the cylinder.

[0007] Preferably, the driven device includes a hydraulic cylinder, which is fixedly installed on one side of the outer surface of the telescopic plate. The inner cavity of the hydraulic cylinder is filled with hydraulic oil. A piston is provided on one side of the inner cavity of the hydraulic cylinder, and multiple limiting mechanisms are provided on the other side of the inner cavity of the hydraulic cylinder. Multiple limiting handles are provided at the end of the piston away from the gear, which are adapted to the multiple limiting mechanisms respectively. The end of the piston away from the limiting mechanism is fixedly connected to the end of a rack away from the gear. A connecting rod is provided at the end of the hydraulic cylinder away from the piston.

[0008] Preferably, the limiting handle includes a connecting rod, which is fixedly installed on the end of the piston away from the gear. A trapezoidal block is provided at the end of the connecting rod away from the gear. A U-shaped rod is provided on one side of the outer surface of the trapezoidal block. A limiting plate is provided on the inner surface of the U-shaped rod near the opening. A torsion spring is provided at the connection between the limiting plate and the U-shaped rod.

[0009] Preferably, the limiting mechanism includes a slide rail, which is fixedly installed on the inner surface of the hydraulic cylinder away from the gear. A slide rod is provided in the middle of the inner cavity of the slide rail. A limiting support plate that is slidably connected to the slide rod is provided on one side of the inner cavity of the slide rail. The end of the limiting support plate near the gear extends to the outside of the slide rail. The limiting support plate is adapted to be used with a trapezoidal block. A spring that is wound around the outer surface of the slide rod is provided on the other side of the inner cavity of the slide rail, and one end of the spring is fixedly connected to the outer surface of the limiting support plate. An elastic telescopic rod one is provided on one side of the middle of the limiting support plate. An elastic telescopic rod two that is fixedly connected to the outer surface of the elastic telescopic rod one is provided on the other side of the middle of the limiting support plate. A limiting rod is provided on one side of the outer surface of the limiting support plate. The limiting rod is adapted to be used with a U-shaped rod.

[0010] Preferably, the limiting support plate includes a second limiting plate, which is slidably installed on one side of the inner cavity of the slide. A mounting hole is provided through the middle of the second limiting plate. The first elastic telescopic rod is slidably installed on the bottom wall of the mounting hole. The second elastic telescopic rod is fixedly installed on one side of the inner cavity surface of the mounting hole. A triangular plate is provided on the upper part of the other side of the inner cavity surface of the mounting hole. A trapezoidal plate is provided at the end of the triangular plate away from the piston. Both the triangular plate and the trapezoidal plate are adapted to be used with a trapezoidal block.

[0011] Preferably, the lower part of the trapezoidal plate is closer to the elastic telescopic rod than the triangular plate.

[0012] Preferably, the support device includes two support rods and a hydraulic cylinder. Both support rods and the hydraulic cylinder are rotatably mounted on the inner surface of the mounting groove two. The output end of the hydraulic cylinder is rotatably mounted on the middle of the outer surface of the support rod located near the hydraulic cylinder. The hydraulic cylinder and the hydraulic cylinder are connected by a hydraulic oil pipe. A connecting rod two is rotatably mounted on the middle of the upper part of the outer surface of the two support rods. A support plate two is provided on the side of the outer surface of the two support rods away from the driven device. Multiple sliding bands are provided on the outer surface of the support plate two.

[0013] Preferably, the lifting mechanism includes two positioning rods, which are fixedly installed on the bottom wall of the mounting groove one. Two support frames are provided on the side of the outer surface of the two positioning rods that are close to each other. The upper part of the two support frames is rotatably installed on the outer surface of the electronic scale. A connecting plate is rotatably installed on the lower part of the outer surface of the two support frames. A tie rod three is fixedly installed between the two connecting plates. In the same mounting slot and inner cavity, the outer surface of the two connecting plates in the middle of the two lifting mechanisms is fixedly connected to the ends of the two limiting mechanisms that are far apart from each other. The lower ends of the two connecting plates in the middle are fixedly connected to the upper side of the outer surface of the telescopic plate.

[0014] Compared with the prior art, the present invention has the following beneficial effects: In the present invention, by setting up a support device, the support device is extended by using a transmission device and a driven device, so that the support device limits and supports the pallet, avoiding the occurrence of cargo tilting and affecting the weighing of the cargo by the electronic scale. At the same time, during the process of the forklift carrying goods, the support devices on both sides can continuously limit and support the pallet, which can greatly avoid the shaking that occurs during the movement of the pallet rack, causing the pallet to shake and the cargo on top to tip over.

[0015] In this invention, by setting up a lifting mechanism and an electronic scale, after the support device limits the pallet, the transmission device drives the lifting mechanism to run through the driven device, so that the lifting mechanism lifts the electronic scale and the support plate upward, thereby lifting the pallet and the lifting mechanism, so that the electronic scale can weigh the goods.

[0016] In this invention, by providing a driven device, when the transmission device drives the driven device, the driven device can drive both the support device and the lifting mechanism. Furthermore, after the electronic scale finishes weighing, when the lifting mechanism drives the electronic scale back to its initial position, the driven device can still limit the support device to the tray, eliminating the need for an additional power source and improving the reliability of the device. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the stretcher assembly of the present invention; Figure 3 This is a schematic diagram of the stretcher loading structure of the present invention; Figure 4 This is a schematic diagram of the relevant device structure of the present invention; Figure 5 This is a schematic diagram of the transmission device structure of the present invention; Figure 6 This is a schematic diagram of the driven device structure of the present invention; Figure 7 This is a schematic diagram of the support device structure of the present invention; Figure 8 For the present invention Figure 7 Enlarged view of a section at point B in the middle; Figure 9 For the present invention Figure 6 Enlarged view of a portion of point A in the middle; Figure 10 This is a schematic diagram of the limiting mechanism structure of the present invention; Figure 11 This is a schematic diagram of the limiting support plate structure of the present invention; Figure 12 This is a schematic diagram of the lifting mechanism of the present invention.

[0018] In the diagram: 1. Forklift body; 2. Stretcher rack; 21. Mounting slot one; 22. Mounting slot two; 3. Pallet; 4. Support plate one; 5. Lifting mechanism; 51. Positioning rod; 52. Support frame; 53. Tie rod three; 54. Connecting plate; 6. Driven device; 61. Hydraulic cylinder; 62. Piston; 63. Limit handle; 631. Connecting rod one; 632. Trapezoidal block; 633. Limit plate one; 634. U-shaped rod; 64. Limiting mechanism; 641. Slide rail; 642. Slide rod; 643. Spring; 644, Limiting plate; 6441, Limiting plate two; 6442, Mounting hole; 6443, Triangular plate; 6444, Trapezoidal plate; 645, Elastic telescopic rod one; 646, Elastic telescopic rod two; 647, Limiting rod; 65, Connecting rod; 7, Transmission device; 71, Telescopic plate; 72, Cylinder; 73, Rack; 74, Gear; 8, Support device; 81, Support rod; 82, Hydraulic cylinder; 83, Connecting rod two; 84, Support plate two; 85, Sliding belt; 9, Electronic scale. Detailed Implementation

[0019] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments. Example 1

[0020] like Figure 1 — Figure 4As shown, this embodiment discloses an electric forklift with weighing function, including a forklift body 1 and a pallet 3. Two stretchers 2 are provided on the front side of the forklift body 1. Both stretchers 2 are inserted into the lower part of the pallet 3. The upper ends of the two stretchers 2 are provided with mounting groove 1 21 on the side that is close to each other. The outer surfaces of the two stretchers 2 are provided with mounting groove 22 on the side that is far from each other. The upper part of the inner cavity of the two mounting grooves 1 21 is provided with a support ring adapted to the support plate 1 4. The middle of the inner cavity of the two mounting grooves 1 21 is provided with a transmission device 7. Both sides of the outer surface of the transmission device 7 are provided with driven devices 6. Both sides of the inner cavity of the two mounting grooves 22 are provided with support devices 8.

[0021] Specifically, the forklift body 1 is a common electric forklift used for transporting goods. Secondly, when stacking goods, the goods are usually stacked on top of the pallet 3. The pallet rack 2 and the pallet 3 are both existing technologies and will not be described in detail in this specification.

[0022] Furthermore, when the electronic scale 9 is not in operation, the lower end of the support plate 4 contacts the upper end of the support ring, and the support ring supports the support plate 4. At the same time, when the support ring supports the support plate 4, the upper end of the support plate 4 is flush with the upper end of the stretcher 2.

[0023] Before weighing the goods, to prevent the goods from tilting and affecting the accuracy of the weighing, the transmission device 7 needs to drive the support device 8 to limit the position of the pallet 3 on which the goods are placed. Figure 5 As shown, the transmission device 7 includes a telescopic plate 71 and a cylinder 72. The cylinder 72 is fixedly installed on the upper end of the telescopic plate 71. A gear 74 is provided in the middle of the upper end of the telescopic plate 71. Both sides of the outer surface of the gear 74 are meshed with racks 73. Both racks 73 are slidably installed on the upper end of the telescopic plate 71. The outer surface of the rack 73 on one side, away from the gear 74, is fixedly connected to the output end of the cylinder 72.

[0024] Specifically, when the support device 8 needs to be moved, the cylinder 72 output drives the rack 73 on one side to slide in the middle of the upper end of the telescopic plate 71, and the rack 73 on the other side also slides in the opposite direction at the upper end of the telescopic plate 71 through the transmission of the gear 74 in the middle, so that the two racks 73 respectively drive the driven device 6 on both sides to run.

[0025] When the transmission device 7 is running, it enables the transmission device 7 to simultaneously drive the two support devices 8 in the same mounting groove 22 through the two driven devices 6, such as... Figure 6As shown, the driven device 6 includes a hydraulic cylinder 61, which is fixedly installed on one side of the outer surface of the telescopic plate 71. The inner cavity of the hydraulic cylinder 61 is filled with hydraulic oil. A piston 62 is provided on one side of the inner cavity of the hydraulic cylinder 61. The end of the piston 62 away from the limiting mechanism 64 is fixedly connected to the end of a rack 73 away from the gear 74.

[0026] Specifically, when the two racks 73 move toward the ends that are far apart from each other, the two racks 73 will push the two pistons 62 respectively, causing the two pistons 62 to push out the hydraulic oil in the inner cavity of the two hydraulic cylinders 61 respectively, thereby causing the hydraulic oil in the inner cavity of the two hydraulic cylinders 61 to drive the two support devices 8 in the inner cavity of the mounting groove 22 respectively.

[0027] Before weighing the goods, to avoid the goods tilting and affecting the weighing process, such as... Figure 7 and Figure 8 As shown, the support device 8 includes two support rods 81 and a hydraulic cylinder 82. Both support rods 81 and hydraulic cylinder 82 are rotatably mounted on the inner surface of the mounting groove 22. The output end of the hydraulic cylinder 82 is rotatably mounted on the middle of the outer surface of the support rod 81 located near the hydraulic cylinder 61. The hydraulic cylinder 82 and the hydraulic cylinder 61 are connected by a hydraulic oil pipe. A connecting rod 83 is rotatably mounted on the upper middle part of the outer surface of the two support rods 81. A support plate 84 is provided on the outer surface of the two support rods 81 away from the driven device 6. Multiple sliding belts 85 are provided on the outer surface of the support plate 84.

[0028] Specifically, when the piston 62 pushes the hydraulic oil in the inner cavity of the hydraulic cylinder 61 to run, the hydraulic oil in the inner cavity of the hydraulic cylinder 61 is introduced into the inner cavity of the support rod 81 through the hydraulic oil pipe between the hydraulic cylinder 61 and the hydraulic cylinder 82, causing the support rod 81 located on the side closer to the hydraulic cylinder 61 to rotate.

[0029] Furthermore, when the support rod 81 on the side near the hydraulic cylinder 61 rotates, since the two support rods 81 are connected by the connecting rod 83, the two support rods 81 can rotate synchronously, thereby causing the two support rods 81 to push the support plate 84 out of the inner cavity of the mounting groove 22 and contact the lower surface of the pallet 3. When all four support plates 84 on both sides are in contact with the lower surface of the pallet 3, the four support devices 8 limit the pallet 3 and prevent the pallet 3 with goods placed on it from tilting.

[0030] Furthermore, when the forklift body 1 moves the pallet 3 and the goods on it through the stretcher 2, the support devices 8 on both sides continuously limit the pallet 3, which can greatly prevent the swaying that occurs during the movement of the stretcher 2, thus avoiding the phenomenon of the pallet 3 swaying and causing the goods on it to tip over. Example 2

[0031] This embodiment further improves upon Embodiment 1 by modifying the driven device 6, enabling the transmission device 7 to drive the support device 8 to move via the driven device 6, and also to drive the lifting mechanism 5 to move, such as... Figure 4 and Figure 12 As shown, lifting mechanisms 5 are provided on both sides of the inner cavity of the two mounting slots 21. Electronic scales 9 are provided on the upper part of the two lifting mechanisms 5 located in the inner cavity of the same mounting slot 21. Support plates 4 are provided on the upper ends of the two electronic scales 9.

[0032] Furthermore, such as Figure 6 As shown, a plurality of limiting mechanisms 64 are provided on the other side of the inner cavity of the hydraulic cylinder 61, and a plurality of limiting handles 63 are provided on the end of the piston 62 away from the gear 74, which are adapted to the plurality of limiting mechanisms 64 respectively. A connecting rod 65 is provided on the end of the hydraulic cylinder 61 away from the piston 62.

[0033] Specifically, the electronic scale 9 can weigh objects, which is existing technology and will not be described in detail in this manual.

[0034] Furthermore, after the transmission device 7 drives the hydraulic oil in the inner cavity of the hydraulic cylinder 61 through the piston 62 to limit the tray 3, the limiting handle 63 contacts the surface of the limiting mechanism 64. At this time, the piston 62 can no longer slide in the inner cavity of the hydraulic cylinder 61, but the cylinder 72 will continue to drive the two racks 73 to move, thereby causing the two racks 73 to push the hydraulic cylinder 61 through the piston 62 and the limiting handle 63 using the limiting mechanism 64. Since the hydraulic cylinder 61 is fixedly installed on the upper side of the telescopic plate 71, the telescopic plate 71 will extend at this time.

[0035] Furthermore, when the hydraulic cylinder 61 drives the telescopic plate 71 to extend, the hydraulic cylinder 61 and the telescopic plate 71 will push the lifting mechanism 5 to move, so that the lifting mechanism 5 lifts the electronic scale 9 upward, enabling the electronic scale 9 to weigh the pallet 3 and the goods.

[0036] Furthermore, after the electronic scale 9 finishes weighing, the transmission device 7 drives the driven device 6 to move to the initial position. However, at this time, the limiting mechanism 64 limits the limiting handle 63. Therefore, the piston 62 cannot move, which prevents the piston 62 from drawing the hydraulic oil introduced into the inner cavity of the hydraulic cylinder 82 back into the inner cavity of the hydraulic cylinder 61. This allows the support device 8 to continuously limit the tray 3.

[0037] Furthermore, after the forklift body 1 transports the pallet 3 and the goods on the pallet 3 to the corresponding position, the transmission device 7 pushes the driven devices 6 on both sides to move away from each other, so that the limiting mechanism 64 releases the limiting handle 63. Then, as the transmission device 7 drives the driven devices 6 back to the initial position, the piston 62 draws the hydraulic oil in the inner cavity of the hydraulic cylinder 82 back into the inner cavity of the hydraulic cylinder 61. During this process, the support device 8 re-enters the inner cavity of the mounting groove 22.

[0038] After the goods have been weighed, the support device 8 can continue to support the pallet 3 on which the goods are placed, such as... Figure 9 As shown, the limiting handle 63 includes a connecting rod 631, which is fixedly installed on the end of the piston 62 away from the gear 74. A trapezoidal block 632 is provided at the end of the connecting rod 631 away from the gear 74. A U-shaped rod 634 is provided on one side of the outer surface of the trapezoidal block 632. A limiting plate 633 is provided on the inner surface of the U-shaped rod 634 near the opening. A torsion spring is provided at the connection between the limiting plate 633 and the U-shaped rod 634.

[0039] In order to limit the limit handle 63 and to coordinate with the action of the limit handle 63, such as Figure 10 As shown, the limiting mechanism 64 includes a slide 641, which is fixedly installed on the inner surface of the hydraulic cylinder 61 on the side away from the gear 74. A slide rod 642 is provided in the middle of the inner cavity of the slide 641. A limiting support plate 644, which is slidably connected to the slide rod 642, is provided on one side of the inner cavity of the slide 641. The end of the limiting support plate 644 near the gear 74 extends to the outside of the slide 641. The limiting support plate 644 is adapted to be used with the trapezoidal block 632. The other side of the inner cavity of the slide 641... A spring 643 is provided, which is wound around the outer surface of the slide rod 642. One end of the spring 643 is fixedly connected to the outer surface of the limiting support plate 644. An elastic telescopic rod 645 is provided on one side of the middle of the limiting support plate 644. An elastic telescopic rod 646 is provided on the other side of the middle of the limiting support plate 644 and is fixedly connected to the outer surface of the elastic telescopic rod 645. A limiting rod 647 is provided on one side of the outer surface of the limiting support plate 644. The limiting rod 647 is adapted to be used with the U-shaped rod 634.

[0040] Furthermore, such as Figure 11As shown, the limiting support plate 644 includes a second limiting plate 6441, which is slidably installed on one side of the inner cavity of the slide rail 641. A mounting hole 6442 is provided through the middle of the second limiting plate 6441. An elastic telescopic rod 645 is slidably installed on the bottom wall of the mounting hole 6442. An elastic telescopic rod 646 is fixedly installed on one side of the inner cavity surface of the mounting hole 6442. A triangular plate 6443 is provided on the upper part of the other side of the inner cavity surface of the mounting hole 6442. A trapezoidal plate 6444 is provided at the end of the triangular plate 6443 away from the piston 62. Both the triangular plate 6443 and the trapezoidal plate 6444 are adapted to be used with the trapezoidal block 632.

[0041] Specifically, during the process of piston 62 pushing hydraulic oil in the inner cavity of hydraulic cylinder 61 into the inner cavity of hydraulic cylinder 82, the inclined surface on trapezoidal block 632 will first contact the inclined surface on triangular plate 6443. When piston 62 continues to move, trapezoidal block 632, through its interaction with the inclined surface on triangular plate 6443, causes triangular plate 6443 to push limiting plate 6441 to slide in the inner cavity of slide rail 641. At this time, spring 643 will be compressed and generate elasticity.

[0042] Furthermore, after the trapezoidal block 632 has moved a certain distance, the end of the trapezoidal block 632 away from the piston 62 contacts the surface of the elastic telescopic rod 645. At this time, the trapezoidal block 632 has not yet contacted the surface of the triangular plate 6443. After the trapezoidal block 632 continues to move a certain distance with the piston 62, the trapezoidal block 632 contacts the surface of the triangular plate 6443. At this time, the spring 643 will push the limiting plate 6441 to move towards the initial position, so that the inclined surface on the trapezoidal plate 6444 contacts the inclined surface on the trapezoidal block 632, and the elastic telescopic rod 645 will also move with the limiting plate 6441. 41 moves, but since the contact surface between the trapezoidal block 632 and the trapezoidal plate 6444 is in the middle of the inclined surface of the trapezoidal plate 6444, the limiting plate 6441 cannot return to the initial position. At the same time, the end face of the trapezoidal block 632 is always in contact with the surface of the elastic telescopic rod 645. When the trapezoidal block 632 continues to move a certain distance, the trapezoidal block 632 compresses the elastic telescopic rod 645 to its maximum stroke. At this time, the support plate 84 completes the limiting of the tray 3. At the same time, when the transmission device 7 continues to push the driven device 6 to run, the driven device 6 can drive the lifting mechanism 5 to move.

[0043] Furthermore, after the electronic scale 9 finishes weighing, when the transmission device 7 pulls the driven device 6 to move to the initial position, the trapezoidal block 632 will move towards the side closer to the piston 62 under the pull of the connecting rod 631, causing the trapezoidal block 632 to slide on the inclined surface of the trapezoidal plate 6444, thereby causing the spring 643 to push the limiting plate 6441 to move. When the plane on the trapezoidal block 632 contacts the plane of the triangular plate 6443, the trapezoidal block 632 disengages from the surface of the elastic telescopic rod 645, and then the elastic telescopic rod 645 returns to the initial state under the action of its internal spring.

[0044] Furthermore, since the trapezoidal block 632 is in planar contact with the triangular plate 6443, the triangular plate 6443 restricts the trapezoidal block 632.

[0045] Furthermore, when it is necessary to release the limiting mechanism 64 from the limiting handle 63, the transmission device 7 pushes the piston 62 to move away from the rack 73. At this time, the trapezoidal block 632 pushes the limiting plate 6441 to slide in the inner cavity of the slide rail 641 again through the trapezoidal plate 6444. During this process, the trapezoidal block 632 pushes the elastic telescopic rod 645 to slide on the bottom wall of the mounting hole 6442, causing the elastic telescopic rod 646 to contract under force.

[0046] Furthermore, as the distance between the surface of the trapezoidal block 632 and the bottom wall of the mounting hole 6442 gradually shortens, the trapezoidal block 632 will drive the U-shaped rod 634 to move, causing the limiting rod 647 to enter the inner cavity of the U-shaped rod 634. During this process, the limiting plate 633 will contact the surface of the limiting rod 647 first. When the bottom wall of the trapezoidal block 632 contacts the surface of the limiting rod 647, the limiting plate 633 will disengage from the surface of the limiting rod 647 and return to its initial state under the action of the torsion spring, locking the limiting rod 647 in the inner cavity of the U-shaped rod 634. At this time, the U-shaped rod 634 and the limiting plate 633 restrict the limiting support plate 644 through the limiting rod 647.

[0047] Furthermore, during the process of the transmission device 7 pulling the piston 62 back to the initial state, since the limiting rod 647 is in the inner cavity of the U-shaped rod 634, the limiting rod 647 restricts the position of the limiting support plate 644. Therefore, the triangular plate 6443 does not restrict the movement of the trapezoidal block 632. After the trapezoidal block 632 moves a certain distance, the limiting rod 647 disengages from the inner cavity surface of the U-shaped rod 634, and the spring 643 pushes the limiting support plate 644 back to the initial position. In addition, the second elastic telescopic rod 646 also pushes the first elastic telescopic rod 645 back to the initial position.

[0048] After the support device 8 restricts the pallet 3, the lifting mechanism 5 pushes the electronic scale 9 upward, lifting the pallet 3 and the goods on top of it to a certain height. Then, the electronic scale 9 weighs the pallet 3 and the goods. Figure 12 As shown, the lifting mechanism 5 includes two positioning rods 51, which are fixedly installed on the bottom wall of the mounting groove 21. Two support frames 52 are provided on the side of the outer surface of the two positioning rods 51 that are close to each other. The upper part of the two support frames 52 is rotatably installed on the outer surface of the electronic scale 9. A connecting plate 54 is rotatably installed on the lower part of the outer surface of the two support frames 52. A tie rod 53 is fixedly installed between the two connecting plates 54.

[0049] Furthermore, the outer surfaces of the two connecting plates 54 located in the middle of the two lifting mechanisms 5 in the same mounting groove 21 are respectively fixedly connected to the ends of the two limiting mechanisms 64 that are far apart from each other, and the lower ends of the two connecting plates 54 located in the middle are respectively fixedly connected to the upper side of the outer surface of the telescopic plate 71.

[0050] Specifically, after the support device 8 completes the limiting of the pallet 3, the transmission device 7 continues to push the driven device 6 to move, which in turn causes the driven device 6 to push the connecting plate 54 to move through the limiting mechanism 64. This causes the connecting plate 54 to push the support frame 52 to slide on the positioning rod 51. At the same time, through the transmission of the pull rod 3 53, another connecting plate 54 drives the support frame 52 connected to it to slide on the surface of the positioning rod 51. Since the upper part of the outer surface of the support frame 52 is rotatably connected to the outer surface of the electronic scale 9, when the four support frames 52 on both sides move, they can lift the electronic scale 9 upward, which in turn causes the electronic scale 9 to push the support plate 4 upward, lifting the pallet 3 and the goods on it, so that the electronic scale 9 can weigh them.

[0051] Furthermore, the connecting plate 54 is rotatably connected to the support frame 52, so the connecting plate 54 does not need to rotate when it pushes the support frame 52.

[0052] Furthermore, as the support frame 52 lifts the electronic scale 9 and the tray 3 upwards, the sliding belt 85 rolls on the surface of the support plate 84 as the tray 3 moves upwards, without restricting the upward movement of the tray 3.

[0053] It should be noted that the specific installation method, circuit layout and connection method, and control method of the forklift body 1, electronic scale 9, and cylinder 72 used in the above embodiment are all conventional designs in the prior art, and will not be described in detail in this invention.

[0054] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. An electric forklift with weighing function, comprising a forklift body (1) and a pallet (3), characterized in that: Two stretcher racks (2) are provided on the front side of the forklift body (1). Both stretcher racks (2) are inserted into the lower part of the pallet (3). The upper ends of the two stretcher racks (2) are provided with mounting slot 1 (21) on the side that is close to each other. The outer surfaces of the two stretcher racks (2) are provided with mounting slot 2 (22) on the side that is far from each other. Lifting mechanisms (5) are provided on both sides of the inner cavity of the two mounting slots (21). Electronic scales (9) are provided on the upper part of the two lifting mechanisms (5) located in the inner cavity of the same mounting slot (21). Support plates (4) are provided on the upper end of the two electronic scales (9). Transmission devices (7) are provided in the middle of the inner cavity of the two mounting slots (21). Driven devices (6) are provided on both sides of the outer surface of the transmission device (7). Support devices (8) are provided on both sides of the inner cavity of the two mounting slots (22). The transmission device (7) includes a telescopic plate (71) and a cylinder (72). The cylinder (72) is fixedly installed on the upper end of the telescopic plate (71). A gear (74) is provided in the middle of the upper end of the telescopic plate (71). Both sides of the outer surface of the gear (74) are meshed with racks (73). Both racks (73) are slidably installed on the upper end of the telescopic plate (71). The outer surface of the rack (73) on one side away from the gear (74) is fixedly connected to the output end of the cylinder (72). The driven device (6) includes a hydraulic cylinder (61), which is fixedly installed on one side of the outer surface of the telescopic plate (71). The inner cavity of the hydraulic cylinder (61) is filled with hydraulic oil. A piston (62) is provided on one side of the inner cavity of the hydraulic cylinder (61), and a plurality of limiting mechanisms (64) are provided on the other side of the inner cavity of the hydraulic cylinder (61). A plurality of limiting handles (63) are provided at the end of the piston (62) away from the gear (74), which are adapted to the plurality of limiting mechanisms (64). The end of the piston (62) away from the limiting mechanism (64) is fixedly connected to the end of a rack (73) away from the gear (74). A connecting rod (65) is provided at the end of the hydraulic cylinder (61) away from the piston (62). The support device (8) includes two support rods (81) and a hydraulic cylinder (82). Both support rods (81) and hydraulic cylinder (82) are rotatably mounted on the inner surface of the mounting groove (22). The output end of the hydraulic cylinder (82) is rotatably mounted on the middle of the outer surface of the support rod (81) located near the hydraulic cylinder (61). The hydraulic cylinder (82) and the hydraulic cylinder (61) are connected by a hydraulic oil pipe. A connecting rod (83) is rotatably mounted on the middle of the upper part of the outer surface of the two support rods (81). A support plate (84) is provided on the side of the outer surface of the two support rods (81) away from the driven device (6). A plurality of sliding strips (85) are provided on the outer surface of the support plate (84). The lifting mechanism (5) includes two positioning rods (51). The two positioning rods (51) are fixedly installed on the bottom wall of the mounting groove (21). Two support frames (52) are provided on the side of the outer surface of the two positioning rods (51) that are close to each other. The upper part of the two support frames (52) is rotatably installed on the outer surface of the electronic scale (9). A connecting plate (54) is rotatably installed on the lower part of the outer surface of the two support frames (52). A pull rod (53) is fixedly installed between the two connecting plates (54). The middle part of the outer surface of the two connecting plates (54) in the middle of the two lifting mechanisms (5) in the same mounting slot (21) is fixedly connected to the ends of the two limiting mechanisms (64) that are far away from each other. The lower ends of the two connecting plates (54) in the middle are fixedly connected to the upper side of the outer surface of the telescopic plate (71). The limiting handle (63) cooperates with the limiting mechanism (64) to restrict the piston (62) from continuing to move relative to the hydraulic cylinder (61) after the support device (8) has completed the limiting of the tray (3). When the cylinder (72) continues to drive the rack (73), the hydraulic cylinder (61) and the telescopic plate (71) push the lifting mechanism (5) to move to lift the electronic scale (9). When the electronic scale (9) finishes weighing and the lifting mechanism (5) drives the electronic scale (9) to fall back, the limiting mechanism (64) keeps the limiting handle (63) in place, so that the supporting device (8) keeps the tray (3) in place.

2. An electric forklift with weighing function according to claim 1, characterized in that: The limiting handle (63) includes a connecting rod (631), which is fixedly installed on the end of the piston (62) away from the gear (74). A trapezoidal block (632) is provided at the end of the connecting rod (631) away from the gear (74). A U-shaped rod (634) is provided on one side of the outer surface of the trapezoidal block (632). A limiting plate (633) is provided on the inner surface of the U-shaped rod (634) near the opening. A torsion spring is provided at the connection between the limiting plate (633) and the U-shaped rod (634).

3. An electric forklift with weighing function according to claim 2, characterized in that: The limiting mechanism (64) includes a slide rail (641), which is fixedly installed on the inner surface of the hydraulic cylinder (61) away from the gear (74). A slide rod (642) is provided in the middle of the inner cavity of the slide rail (641). A limiting support plate (644) is provided on one side of the inner cavity of the slide rail (641) and is slidably connected to the slide rod (642). The end of the limiting support plate (644) near the gear (74) extends to the outside of the slide rail (641). The limiting support plate (644) is adapted to be used with the trapezoidal block (632). The inner cavity of the slide rail (641) On the other side, a spring (643) is provided, which is wrapped around the outer surface of the slide rod (642). One end of the spring (643) is fixedly connected to the outer surface of the limiting support plate (644). On one side of the middle part of the limiting support plate (644), an elastic telescopic rod one (645) is provided. On the other side of the middle part of the limiting support plate (644), an elastic telescopic rod two (646) is fixedly connected to the outer surface of the elastic telescopic rod one (645). On one side of the outer surface of the limiting support plate (644), a limiting rod (647) is provided. The limiting rod (647) is adapted to be used with the U-shaped rod (634).

4. An electric forklift with weighing function according to claim 3, characterized in that: The limiting support plate (644) includes a second limiting plate (6441), which is slidably installed on one side of the inner cavity of the slide (641). A mounting hole (6442) is provided through the middle of the second limiting plate (6441). A first elastic telescopic rod (645) is slidably installed on the bottom wall of the mounting hole (6442). A second elastic telescopic rod (646) is fixedly installed on one side of the inner cavity surface of the mounting hole (6442). A triangular plate (6443) is provided on the upper part of the other side of the inner cavity surface of the mounting hole (6442). A trapezoidal plate (6444) is provided at the end of the triangular plate (6443) away from the piston (62). Both the triangular plate (6443) and the trapezoidal plate (6444) are adapted to the trapezoidal block (632).

5. An electric forklift with weighing function according to claim 4, characterized in that: The lower part of the trapezoidal plate (6444) is closer to the elastic telescopic rod (645) than the triangular plate (6443).

Images