An overload protection device for a pallet jack

Abstract

The utility model belongs to tray carrier technology field, specifically disclose a kind of overload protection device of tray carrier.The utility model includes the overload protection component of being arranged in the one side of vehicle body, the one side of vehicle body is equipped with moving frame, the one side of moving frame is equipped with tray, and overload protection component is arranged between tray and moving frame, and the safety and reliability of tray carrier can be improved by overload protection component, goods weight can be accurately monitored, react quickly once overload, timely close carrier working state, effectively avoid the damage of vehicle body structure due to overload, excessive wear of key components, extend the service life of equipment, reduce maintenance cost, and strongly guarantee the personal safety of operator, prevent the dangerous condition of imbalance, tip over etc. due to carrier overload, reduce the probability of occurrence of safety accident, simultaneously, the overall performance of carrier is enhanced by overload protection component structure, provide solid guarantee for the efficient, safe development of logistics handling operation.

Description

Technical Field

[0001] This application relates to the field of pallet truck technology, and more specifically, to an overload protection device for a pallet truck. Background Technology

[0002] Pallet trucks are lightweight handling equipment widely used in logistics and warehousing, primarily for moving goods placed on pallets. They typically consist of a chassis, forks, wheels, and control handles. Driven manually or electrically, they enable horizontal transport of palletized goods, short-distance transportation, and loading / unloading operations. The forks insert into the bottom of the pallet, lifting the pallet and its contents together. The wheels allow for flexible movement on the ground. Easy to operate and highly mobile, they are an important tool for improving cargo handling efficiency and reducing labor costs, playing a crucial role in warehouses, factories, and logistics centers.

[0003] In actual operation, operators may inadvertently overload existing pallet trucks with goods exceeding their rated weight in pursuit of efficiency. Overloading is also prone to occur when the weight of some goods is difficult to accurately estimate. Overloading not only seriously affects the service life of the pallet truck, putting excessive pressure on the vehicle structure, transmission components, and hydraulic system, accelerating component wear, and increasing maintenance costs, but also poses a great safety hazard. It can cause the pallet truck to lose balance and brake failure during operation, leading to serious accidents such as goods falling or even personal injury. Utility Model Content

[0004] To address the aforementioned problems, this application provides an overload protection device for a pallet truck.

[0005] The overload protection device for a pallet truck provided in this application adopts the following technical solution:

[0006] An overload protection device for a pallet truck includes an overload protection component disposed on one side of the vehicle body, a movable frame disposed on one side of the vehicle body, a pallet disposed on one side of the movable frame, and the overload protection component disposed between the pallet and the movable frame.

[0007] The overload protection component includes a rotating plate, one side of which is connected to one side of the pallet. A friction block is provided on the other side of the rotating plate. A button is provided on one side of the moving frame. The pallet moves down to drive the rotating plate to rotate. The rotating plate is used to activate the button to provide overload protection for the vehicle body.

[0008] Furthermore, the overload protection component also includes a base frame with an internal cavity. The base frame is located on one side of the mobile frame, and the cavity has a sliding groove. The bottom of the tray is slidably connected to the sliding groove.

[0009] Furthermore, a rotating shaft is rotatably connected to one side of the mobile frame, and a rotating plate is fixedly connected to the outer wall of the rotating shaft. A connecting plate is provided on the side of the rotating plate away from the tray.

[0010] Furthermore, a connecting rod is rotatably connected to the bottom of the connecting plate, and a box is provided on one side of the movable frame. A through hole is opened on the top of the box, and the connecting rod passes through the through hole and is rotatably connected to the top of the friction block. The friction block is located inside the box.

[0011] Furthermore, a hollow column is provided on one side of the movable frame, and a limit groove is opened on the top of the connecting plate. A movable rod is slidably connected inside the limit groove, and the movable rod is slidably connected to the hollow column. A button is set on the inner top wall of the hollow column.

[0012] The above technical solutions can improve the safety and reliability of pallet trucks and enable accurate monitoring of cargo weight.

[0013] Furthermore, hollow slots are provided on both sides of the inside of the tray, and an extension plate is slidably connected inside each hollow slot.

[0014] The above technical solutions can increase the load-bearing area of ​​the pallet.

[0015] Furthermore, one side of the tray has rounded corners.

[0016] Furthermore, the top of the tray has multiple long slots, and each long slot is rotatably connected to multiple rollers.

[0017] The above technical solutions facilitate the sliding of goods on the pallet and reduce handling resistance.

[0018] In summary, this application includes at least one of the following beneficial technical effects:

[0019] This utility model improves the safety and reliability of pallet trucks through an overload protection component. It can accurately monitor the weight of goods and react quickly in case of overload, shutting down the truck in time. This effectively avoids damage to the vehicle structure and excessive wear of key components caused by overload, extending the service life of the equipment, reducing maintenance costs, and strongly protecting the personal safety of operators. It prevents dangerous situations such as imbalance and tipping due to overload, reducing the probability of safety accidents. At the same time, the overload protection component structure enhances the overall performance of the truck, providing a solid guarantee for the efficient and safe operation of logistics handling.

[0020] (2) By setting the extension plate, the pallet's load-bearing area can be increased, making it adaptable to the handling needs of goods of different sizes and improving the versatility of the handling vehicle. The setting of multiple rollers and rounded corners facilitates the sliding of goods on the pallet and reduces handling resistance. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the extension plate and the overall structure of the vehicle body of this utility model;

[0023] Figure 3 This is a schematic diagram of the overall structure of the mobile frame of this utility model;

[0024] Figure 4 This is a cross-sectional view of the overall structure of the mobile frame of this utility model;

[0025] Figure 5 For the present utility model Figure 4 Enlarged view of the structure at point A;

[0026] Figure 6 This is a plan view of the connection structure between the pallet and the base frame of this utility model;

[0027] Figure 7 This is a plan view of the connection structure between the tray and the extension plate of this utility model.

[0028] Explanation of reference numerals in the attached drawings: 1. Vehicle body; 2. Pallet; 3. Moving frame; 4. Base frame; 5. Cavity; 6. Slide groove; 7. Turning plate; 8. Rotating shaft; 9. Connecting plate; 10. Connecting rod; 11. Moving rod; 12. Friction block; 13. Hollow column; 14. Button; 15. Hollow groove; 16. Extension plate; 17. Long groove; 18. Roller; 19. Box body; 20. Limiting groove; 21. Through hole. Detailed Implementation

[0029] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0030] Reference Figures 1-5 An overload protection device for a pallet truck includes an overload protection component disposed on one side of the vehicle body 1, a movable frame 3 disposed on one side of the vehicle body 1, a pallet 2 disposed on one side of the movable frame 3, and the overload protection component disposed between the pallet 2 and the movable frame 3.

[0031] The overload protection component includes a rotating plate 7, one side of which is connected to one side of the pallet 2. A friction block 12 is provided on the other side of the rotating plate 7. A button 14 is provided on one side of the moving frame 3. The pallet 2 moves down to drive the rotating plate 7 to rotate. The rotating plate 7 is used to activate the button 14 to provide overload protection for the vehicle body 1.

[0032] Reference Figures 1-5The overload protection component also includes a base frame 4, with a cavity 5 inside the base frame 4. The base frame 4 is located on one side of the movable frame 3. A groove 6 is provided inside the cavity 5. The bottom of the tray 2 is slidably connected to the groove 6. A rotating shaft 8 is rotatably connected to one side of the movable frame 3. A rotating plate 7 is fixedly connected to the outer wall of the rotating shaft 8. A connecting plate 9 is provided on the side of the rotating plate 7 away from the tray 2. A connecting rod 10 is rotatably connected to the bottom of the connecting plate 9. A box 19 is provided on one side of the movable frame 3. A through hole 21 is provided on the top of the box 19. The connecting rod 10 passes through the through hole 21 and is rotatably connected to the top of the friction block 12. The friction block 12 is located inside the box 19. A hollow column 13 is provided on one side of the movable frame 3. A limiting groove 20 is provided on the top of the connecting plate 9. A moving rod 11 is slidably connected inside the limiting groove 20. The moving rod 11 is slidably connected to the hollow column 13. A button 14 is provided on the inner top wall of the hollow column 13.

[0033] The overload protection component can shut down the transport vehicle when it is overloaded, preventing it from working. Specifically, the friction block 12 matches the friction and overload values ​​set inside the box 19. When the goods carried by the pallet 2 reach the overload state, the pallet 2 will slide down the slide groove 6 due to the increased gravity. The sliding of the pallet 2 will drive the rotating plate 7 fixed to it to rotate around the rotating shaft 8. When the rotating plate 7 rotates, the connecting plate 9 moves accordingly. During the movement of the connecting plate 9, it drives the connecting rod 10 to push the friction block 12 inside the box 19 to move upward. As the friction block 12 moves upward, the connecting plate 9 continues to move, causing the moving rod 11 to slide in the limiting groove 20 and the hollow column 13, eventually triggering the button 14 on the top wall inside the hollow column 13. Since the button 14 is electrically connected to the vehicle body 1, it will send a signal to the control system of the vehicle body 1 after being triggered. Upon receiving the signal, the control system will immediately cut off the power source of the transport vehicle, shut down the transport vehicle, and prevent it from working. In this way, the device achieves overload protection for the transport vehicle, effectively avoiding equipment damage and safety accidents caused by overloading.

[0034] Overload protection components enhance the safety and reliability of transport vehicles. They accurately monitor cargo weight and react quickly to overload, shutting down the vehicle promptly. This effectively prevents structural damage and excessive wear of critical components caused by overloading, extending equipment lifespan, reducing maintenance costs, and strongly protecting operator safety. Overloading also prevents imbalances and tipping, reducing the probability of accidents. Furthermore, the overload protection components enhance the overall performance of the transport vehicle, providing a solid guarantee for efficient and safe logistics handling operations.

[0035] Reference Figure 2 , Figure 6 and Figure 7Hollow slots 15 are provided on both sides of the interior of the tray 2. An extension plate 16 is slidably connected inside each hollow slot 15. One side of the tray 2 has rounded corners. Multiple long slots 17 are provided on the top of the tray 2. Multiple rollers 18 are rotatably connected inside each long slot 17.

[0036] By setting the extension plate 16, the load-bearing area of ​​the pallet 2 can be increased, making it adaptable to the handling needs of goods of different sizes and improving the versatility of the handling vehicle.

[0037] The multiple rollers 18 and rounded corners facilitate the sliding of goods on the pallet 2, reducing handling resistance.

[0038] Working Principle: Since the friction block 12 matches the friction and overload values ​​set inside the box 19, when the goods carried by the pallet 2 reach an overload state, the pallet 2 will slide downwards along the slide groove 6 due to the increased gravity. The downward movement of the pallet 2 causes the rotating plate 7, which is fixedly connected to it, to rotate around the rotating shaft 8. When the rotating plate 7 rotates, the connecting plate 9 moves accordingly. During the movement of the connecting plate 9, it drives the connecting rod 10 to push the friction block 12 inside the box 19 upwards. As the friction block 12 moves upwards, the connecting plate 9 continues to move, causing the moving rod 11 to slide within the limiting groove 20 and the hollow column 13, ultimately triggering the button 14 on the top wall inside the hollow column 13. Since the button 14 is electrically connected to the vehicle body 1, after being triggered, it sends a signal to the control system of the vehicle body 1. Upon receiving the signal, the control system immediately cuts off the power source of the transport vehicle, shutting down its working state and preventing it from operating. In this way, the device achieves overload protection for the transport vehicle, effectively avoiding equipment damage and safety accidents caused by overload.

[0039] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An overload protection device for a pallet truck, comprising an overload protection assembly arranged on one side of a truck body (1), characterized in that, A movable frame (3) is provided on one side of the vehicle body (1), and a tray (2) is provided on one side of the movable frame (3). The overload protection component is located between the tray (2) and the movable frame (3). The overload protection component includes a rotating plate (7), one side of which is connected to one side of the tray (2), and the other side of the rotating plate (7) is provided with a friction block (12). A button (14) is provided on one side of the moving frame (3). The tray (2) moves down to drive the rotating plate (7) to rotate. The rotating plate (7) is used to activate the button (14) to provide overload protection for the vehicle body (1).

2. An overload protection device for a pallet jack as defined in claim 1, wherein: The overload protection component also includes a base frame (4), which has a cavity (5) inside. The base frame (4) is located on one side of the movable frame (3). The cavity (5) has a groove (6) inside. The bottom of the tray (2) is slidably connected to the groove (6).

3. An overload protection device for a pallet jack as defined in claim 2 wherein: The movable frame (3) is rotatably connected to a rotating shaft (8) on one side, and the rotating plate (7) is fixedly connected to the outer wall of the rotating shaft (8). A connecting plate (9) is provided on the side of the rotating plate (7) away from the tray (2).

4. An overload protection device for a pallet jack as defined in claim 3 wherein: The bottom of the connecting plate (9) is rotatably connected to a connecting rod (10). The side of the movable frame (3) is provided with a box (19). The top of the box (19) is provided with a through hole (21). The connecting rod (10) passes through the through hole (21) and is rotatably connected to the top of the friction block (12). The friction block (12) is located inside the box (19).

5. An overload protection device for a pallet jack as defined in claim 4 wherein: A hollow column (13) is provided on one side of the movable frame (3), and a limiting groove (20) is provided on the top of the connecting plate (9). A moving rod (11) is slidably connected inside the limiting groove (20). The moving rod (11) is slidably connected to the hollow column (13), and the button (14) is provided on the inner top wall of the hollow column (13).

6. The overload protection device for a pallet truck according to claim 1, characterized in that: Hollow slots (15) are provided on both sides of the interior of the tray (2), and an extension plate (16) is slidably connected inside each hollow slot (15).

7. An overload protection device for a pallet jack as defined in claim 1 wherein: The tray (2) has rounded corners on one side.

8. An overload protection device for a pallet jack as defined in claim 1 wherein: The top of the tray (2) is provided with multiple long slots (17), and each long slot (17) is rotatably connected to multiple rollers (18).

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