An electric pallet truck with folding steps

Abstract

The utility model discloses a kind of electric pallet trucks of folding pedal, including truck body and lifting fork arm, the power output end of the truck body is provided with two groups lifting fork arm, the side wall of the truck body is provided with pedal body, the side of the pedal body close to truck body is provided with hinged shaft, and pedal body is movably connected with truck body by hinged shaft, electric push rod is symmetrically movably installed on the side wall of the truck body of the side of pedal body, the output end of the electric push rod is all installed with push arm, the end close to pedal body of the push arm is all provided with connecting shaft. The utility model not only realizes folding use to pedal and limiting fixing to the tray needing to be transported, facilitates reciprocating swing scraping cleaning to dust adhered on the surface of inductive radar, reduces the space occupation of pedal, and moreover improves the stability of tray in the process of transportation.

Description

Technical Field

[0001] This utility model relates to the field of pallet truck technology, specifically to an electric pallet truck with a folding pedal. Background Technology

[0002] Electric pallet trucks are battery-powered warehousing and industrial vehicles driven by DC motors and lifted by hydraulic workstations. They are characterized by low noise and low pollution. Their five-point support structure and drive wheel shock absorption system ensure stability on slopes. They are equipped with safety features such as power-off brakes and anti-collision switches. Core components include an integrated motor drive, MOSFET electronic control, and polyurethane wheels, supporting stepless speed regulation and thermal protection. They are mainly used for goods transfer in shopping malls and warehouses, and are particularly suitable for the needs of the food and textile industries. Traditional pallet trucks typically have fixed pedals that cannot be folded, which takes up considerable space. Furthermore, traditional pallet transport often involves directly carrying the pallet, which can cause displacement during movement and result in poor stability during transport. To reduce the space occupied by the pedals and improve pallet stability during transport, a foldable pedal electric pallet truck is proposed.

[0003] For example, the electric pallet transport vehicle that is easy to disassemble and assemble disclosed in the authorization announcement number CN220845367U includes a housing and a pedal. The pedal is provided with a connecting plate at one end near the housing, and the connecting plate is provided with an insert plate at one end near the housing. An installation groove is provided on the outer side of the housing near the insert plate. The insert plate is inserted into the inside of the installation groove. A baffle is provided on the outer side of the housing near the installation groove. One side of the insert plate is attached to the inner wall of the installation groove, and the other side of the insert plate is attached to the baffle. A locking mechanism is provided inside the insert plate. Although it enables convenient installation of the electric pallet truck's pedals, simplifies the installation process, reduces installation time, lowers labor intensity, and improves installation and disassembly efficiency; However, it did not solve the problem that existing pallet trucks are not conducive to folding the pedals and fixing the pallets to be transported, nor to scraping and cleaning the dust adhering to the sensor radar surface, which affects the stability of the pallets during transportation. Utility Model Content

[0004] The purpose of this utility model is to provide an electric pallet truck with a folding pedal to solve the problems mentioned in the background art, such as the inconvenience of folding the pedal and fixing the pallet to be transported, the difficulty in cleaning the dust adhering to the sensor radar surface by reciprocating swinging, and the impact on the stability of the pallet during transportation.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an electric pallet transporter with a folding pedal, comprising a transporter body and lifting fork arms. Two sets of lifting fork arms are provided at the power output end of the transporter body. A pedal body is provided on the side wall of the transporter body. A hinge shaft is provided on the side of the pedal body near the transporter body, and the pedal body is movably connected to the transporter body via the hinge shaft. Electric push rods are symmetrically and movably mounted on the side wall of the transporter body on one side of the pedal body. Each electric push rod has a push arm installed at its output end. A connecting shaft is provided at the end of each push arm near the pedal body, and the push arm is movably connected to the pedal body via the connecting shaft. A first servo motor is provided inside each lifting fork arm. A bidirectional lead screw is installed at the output end of each first servo motor, and the bidirectional lead screw is movably connected to the lifting fork arm. Two sets of threaded sleeves are fitted onto the surface of each bidirectional lead screw, and the threaded sleeves are threadedly connected to the bidirectional lead screw. A linkage arm is symmetrically arranged on the side wall of each threaded sleeve.

[0006] Preferably, each of the linkage arms is provided with a pin at one end near the threaded sleeve, and the linkage arm is movably connected to the threaded sleeve through the pin. Clamping blocks are provided on both sides of the bidirectional lead screw.

[0007] Preferably, each of the linkage arms is provided with a linkage shaft at one end near the clamping block, and the linkage arm is movably connected to the clamping block through the linkage shaft, and the clamping block is slidably connected to the lifting fork arm.

[0008] Preferably, each lifting fork arm on one side of the bidirectional lead screw is equipped with an integrated frame, and each lifting fork arm on one side of the integrated frame is equipped with a sensing radar.

[0009] Preferably, a second servo motor is provided on each side wall of the integrated frame, and a worm gear is installed at the output end of each second servo motor.

[0010] Preferably, worm gears are movably installed inside the integrated frame on one side of the worm, and the worm and worm gears mesh with each other.

[0011] Preferably, each of the worm gears has a long connecting arm on its sidewall, and each long connecting arm has a left movable shaft at the end near the worm gear, and the long connecting arm is movably connected to the worm gear through the left movable shaft.

[0012] Preferably, each of the long connecting arms has a short connecting arm at the end furthest from the worm gear, and each of the short connecting arms has a right movable shaft at the end closest to the long connecting arm, and the short connecting arm is movably connected to the long connecting arm through the right movable shaft.

[0013] Preferably, a drive shaft is fixedly installed at the end of the short connecting arm away from the long connecting arm, and the drive shaft is movably connected to the integrated frame, and the drive shaft extends to the outside of the integrated frame, and a brush holder is provided on the surface of the drive shaft.

[0014] Preferably, a PLC controller is provided at the top of the transport vehicle body, and the output terminal of the PLC controller is electrically connected to the input terminals of the electric push rod, the first servo motor, and the second servo motor.

[0015] Compared with the prior art, the beneficial effects of this utility model are: this transport vehicle not only realizes the folding use of the pedals and the limiting and fixing of the pallets to be transported, but also facilitates the reciprocating swinging and scraping cleaning of dust adhering to the surface of the sensing radar, reducing the space occupied by the pedals, and improving the stability of the pallets during transportation: (1) The electric push rod drives the push arm to move, and the push arm drives the pedal body to rotate around the hinge axis through the connecting shaft to open the pedal body, so that the pedal body and the pallet car body form a 90-degree angle. The operator can stand on the pedal body to use the pallet car body. After use, just open the electric push rod in the opposite direction, and the electric push rod will drive the pedal body to rotate and reset, so that the pedal body will fold back to reduce the space occupied by the pedal. When transporting the pallet, the lifting fork arm is inserted into the gap of the partition at the bottom of the pallet. When the pallet is moved, the pallet will be displaced. The first servo motor drives the bidirectional screw to rotate, and the bidirectional screw drives the two sets of threaded sleeves to move towards each other. The threaded sleeve drives the linkage arm to rotate through the pin shaft, and the linkage arm drives the clamping block to rotate through the linkage shaft, so that the clamping block extends out from the inside of the lifting fork arm and abuts against the surface of the partition, thereby fixing the pallet. This can prevent the pallet from being displaced during transportation. The above design allows the pedal to be folded for use, which can facilitate the limiting and fixing of the pallet to be transported, and can improve the stability of the pallet during transportation.

[0016] (2) During use, the sensing radar senses the distance to obstacles in front. If the surface of the sensing radar is covered with dust, it will affect its operation. The second servo motor drives the worm gear to rotate, and the worm gear drives the worm wheel to rotate. Since the left movable shaft is located at the eccentric position of the worm wheel, the worm wheel drives the long connecting arm to swing back and forth through the left movable shaft. The long connecting arm drives the short connecting arm to swing back and forth through the right movable shaft. The short connecting arm drives the drive shaft to rotate back and forth. The drive shaft drives the brush holder to swing back and forth. The brush holder swings back and forth to scrape and clean the dust on the surface of the sensing radar, thereby cleaning the dust on the surface of the sensing radar to ensure that the surface of the sensing radar is clean and tidy, and thus improves the stability of its operation. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a front view structural diagram of the present utility model; Figure 3 This is a three-dimensional perspective structural diagram of the lifting fork arm of this utility model; Figure 4 For the present utility model Figure 3 Enlarged structural diagram at point A in the middle; Figure 5 This is a side view sectional structural diagram of the integrated frame of this utility model.

[0018] In the diagram: 1. Transport vehicle body; 2. PLC controller; 3. Lifting fork arm; 4. Pedal body; 5. Hinge shaft; 6. Electric push rod; 7. Push arm; 8. Connecting shaft; 9. First servo motor; 10. Bidirectional lead screw; 11. Threaded sleeve; 12. Linkage arm; 13. Clamping block; 14. Linkage shaft; 15. Pin shaft; 16. Integrated frame; 17. Sensor radar; 18. Brush holder; 19. Drive shaft; 20. Second servo motor; 21. Worm gear; 22. Worm wheel; 23. Long connecting arm; 24. Short connecting arm; 25. Left movable shaft; 26. Right movable shaft. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0022] Example 1 Please see Figures 1 to 5This utility model provides an embodiment of an electric pallet trolley with a folding pedal, comprising a trolley body 1 and lifting fork arms 3. Two sets of lifting fork arms 3 are provided at the power output end of the trolley body 1. A pedal body 4 is provided on the side wall of the trolley body 1. A hinge shaft 5 is provided on the side of the pedal body 4 near the trolley body 1, and the pedal body 4 is movably connected to the trolley body 1 via the hinge shaft 5. Electric push rods 6 are symmetrically and movably mounted on the side wall of the trolley body 1 on one side of the pedal body 4. Each electric push rod 6 has a push arm 7 installed at its output end. Each push arm 7 has a connecting shaft 8 at its end near the pedal body 4, and the push arm 7 is movably connected to the pedal body 4 via the connecting shaft 8. The lifting fork arms 3 are each provided with a first... A servo motor 9 is provided. The output end of the first servo motor 9 is equipped with a bidirectional lead screw 10, and the bidirectional lead screw 10 is movably connected to the lifting fork arm 3. The surface of the bidirectional lead screw 10 is fitted with two sets of threaded sleeves 11, and the threaded sleeves 11 are threadedly connected to the bidirectional lead screw 10. The side wall of the threaded sleeve 11 is symmetrically provided with a linkage arm 12. The end of the linkage arm 12 near the threaded sleeve 11 is provided with a pin 15, and the linkage arm 12 is movably connected to the threaded sleeve 11 through the pin 15. The two sides of the bidirectional lead screw 10 are provided with clamping blocks 13. The end of the linkage arm 12 near the clamping block 13 is provided with a linkage shaft 14, and the linkage arm 12 is movably connected to the clamping block 13 through the linkage shaft 14. The clamping block 13 is slidably connected to the lifting fork arm 3. In this utility model, the PLC controller 2 is a Siemens S7-200, which is a mature existing technology. Therefore, its internal structure, working principle, and connection and control methods with the electrical components in this application will not be described in detail. When the pallet trolley body 1 needs to be used, the electric push rod 6 is opened by operating the PLC controller 2. The electric push rod 6 drives the push arm 7 to move, and the push arm 7 drives the pedal body 4 to rotate around the hinge shaft 5 via the connecting shaft 8, thereby opening the pedal body 4 and forming a 90-degree angle between the pedal body 4 and the pallet trolley body 1. The operator can then stand on the pedal body 4 to use the pallet trolley body 1. After use, simply open the electric push rod 6 in the opposite direction, and the electric push rod 6 will drive the pedal body 4 to rotate and reset, folding the pedal body 4 back to reduce the space occupied by the pedal. During transportation, the lifting fork arm 3 is inserted into the gap of the partition at the bottom of the pallet. When the pallet shifts during movement, the first servo motor 9 can be turned on, which drives the bidirectional lead screw 10 to rotate. Under the mutual meshing of the bidirectional lead screw 10 and the threaded sleeve 11, the bidirectional lead screw 10 drives the two sets of threaded sleeves 11 to move towards each other. The threaded sleeve 11 drives the linkage arm 12 to rotate through the pin 15. The linkage arm 12 drives the clamping block 13 to rotate through the linkage shaft 14. Under the synchronous cooperation of the two sets of linkage arms 12, the clamping block 13 extends out from the inside of the lifting fork arm 3 and abuts against the surface of the partition, thereby fixing the pallet. This can prevent the pallet from shifting during transportation. The above design allows the pedal to be folded for convenient positioning and fixing of the pallet to be transported, which can improve the stability of the pallet during transportation. An integrated frame 16 is installed inside the lifting fork arm 3 on one side of the bidirectional lead screw 10. An induction radar 17 is installed inside the lifting fork arm 3 on one side of the integrated frame 16. A second servo motor 20 is installed on the side wall of the integrated frame 16. A worm gear 21 is installed at the output end of the second servo motor 20. The worm gear 21 is movably installed inside the integrated frame 16 on one side of the worm 21, and the worm gear 21 and the worm gear 22 mesh with each other. The side wall of the worm gear 22 is provided with a long connecting arm 23. The end of the long connecting arm 23 near the worm gear 22 is provided with a left movable shaft 25, and the long connecting arm 23 is movably connected to the worm gear 22 through the left movable shaft 25. Each end of the long connecting arm 23 away from the worm gear 22 is provided with a short connecting arm 24. Each end of the short connecting arm 24 near the long connecting arm 23 is provided with a right movable shaft 26. The short connecting arm 24 is movably connected to the long connecting arm 23 through the right movable shaft 26. Each end of the short connecting arm 24 away from the long connecting arm 23 is fixedly installed with a drive shaft 19. The drive shaft 19 is movably connected to the integrated frame 16 and extends to the outside of the integrated frame 16. A brush holder 18 is provided on the surface of the drive shaft 19. A PLC controller 2 is installed on the top of the transport vehicle body 1, and the output terminal of the PLC controller 2 is electrically connected to the input terminals of the electric push rod 6, the first servo motor 9, and the second servo motor 20. During use, the sensing radar 17 senses the distance to obstacles in front. If dust adheres to the surface of the sensing radar 17, it will affect its operation. At this time, the second servo motor 20 can be turned on, which drives the worm gear 21 to rotate. Under the mutual meshing of the worm gear 21 and the worm wheel 22, the worm gear 21 drives the worm wheel 22 to rotate. Since the left movable shaft 25 is located at the eccentric position of the worm wheel 22, the worm wheel 22 drives the long connecting arm 23 to swing back and forth through the left movable shaft 25. The long connecting arm 23 drives the short connecting arm 24 to swing back and forth through the right movable shaft 26. The short connecting arm 24 drives the drive shaft 19 to rotate back and forth. The drive shaft 19 drives the brush holder 18 to swing back and forth. The brush holder 18 swings back and forth to scrape and clean the dust on the surface of the sensing radar 17, thereby cleaning the dust on the surface of the sensing radar 17 and ensuring that the surface of the sensing radar 17 is clean and tidy, thereby improving its working stability.

[0023] Work steps When the pallet trolley body 1 is needed, the electric push rod 6 drives the push arm 7 to move. The push arm 7, through the connecting shaft 8, drives the pedal body 4 to rotate around the hinge shaft 5, opening the pedal body 4 and creating a 90-degree angle between the pedal body 4 and the pallet trolley body 1. The operator can then stand on the pedal body 4 to use the pallet trolley body 1. After use, simply reverse the electric push rod 6, which will drive the pedal body 4 to rotate back to its original position, folding it back to reduce the space occupied by the pedal. When transporting pallets, the lifting fork arm 3 is inserted into the gap of the partition at the bottom of the pallet. During movement, the pallet will shift. The first servo motor 9 drives the bidirectional lead screw 10 to rotate, which in turn drives the two sets of threaded sleeves 11 to move towards each other. The threaded sleeves 11, through the pin shaft 15, drive the linkage arm 12 to rotate, which in turn drives the clamping block 13 to rotate through the linkage shaft 14. This causes the clamping block 13 to extend from inside the lifting fork arm 3 and abut against the partition. The surface of the pallet is fixed to prevent displacement during transportation. During use, the sensor radar 17 senses the distance to obstacles in front. If dust adheres to the surface of the sensor radar 17, it will affect its operation. The second servo motor 20 drives the worm gear 21 to rotate, which in turn drives the worm wheel 22 to rotate. Since the left movable shaft 25 is located at the eccentric position of the worm wheel 22, the worm wheel 22 drives the long connecting arm 23 to swing back and forth through the left movable shaft 25. The long connecting arm 23 drives the short connecting arm 24 to swing back and forth through the right movable shaft 26. The short connecting arm 24 drives the drive shaft 19 to rotate back and forth, which in turn drives the brush frame 18 to swing back and forth. The brush frame 18 uses the back and forth swinging motion to scrape and clean the dust on the surface of the sensor radar 17, thus cleaning the surface of the sensor radar 17 and ensuring its cleanliness. This ensures the normal operation of the pallet truck. The above is the complete usage of the electric pallet truck with folding pedals.

[0024] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An electric pallet trolley with a folding pedal, comprising a trolley body and a lifting fork arm, characterized in that: The power output end of the transport vehicle body is equipped with two sets of lifting forks. A pedal body is provided on the side wall of the transport vehicle body. A hinge shaft is provided on the side of the pedal body near the transport vehicle body, and the pedal body is movably connected to the transport vehicle body through the hinge shaft. Electric push rods are symmetrically and movably installed on the side wall of the transport vehicle body on one side of the pedal body. Each electric push rod has a push arm installed at its output end. Each push arm has a connecting shaft at its end near the pedal body, and the push arm is movably connected to the pedal body through the connecting shaft. Each lifting fork arm is equipped with a first servo motor. Each output end of the first servo motor is equipped with a bidirectional lead screw, and the bidirectional lead screw is movably connected to the lifting fork arm. Two sets of threaded sleeves are fitted on the surface of each bidirectional lead screw, and the threaded sleeves are threadedly connected to the bidirectional lead screw. Each threaded sleeve has a linkage arm symmetrically arranged on its side wall.

2. The electric pallet truck with a folding pedal according to claim 1, characterized in that: Each of the linkage arms is provided with a pin at one end near the threaded sleeve, and the linkage arm is movably connected to the threaded sleeve through the pin. Both sides of the bidirectional lead screw are provided with clamping blocks.

3. The electric pallet truck with a folding pedal according to claim 1, characterized in that: Each of the linkage arms is provided with a linkage shaft at one end near the clamping block, and the linkage arm is movably connected to the clamping block through the linkage shaft, while the clamping block is slidably connected to the lifting fork arm.

4. The electric pallet trolley with folding pedals according to claim 1, characterized in that: Each lifting fork arm on one side of the bidirectional lead screw is equipped with an integrated frame, and each lifting fork arm on one side of the integrated frame is equipped with a sensing radar.

5. The electric pallet truck with a folding pedal according to claim 4, characterized in that: Each of the side walls of the integrated frame is equipped with a second servo motor, and each of the output ends of the second servo motor is equipped with a worm gear.

6. The electric pallet truck with a folding pedal according to claim 5, characterized in that: The worm gear has worm wheels movably installed inside the integrated frame on one side of the worm, and the worm and worm wheels mesh with each other.

7. The electric pallet truck with a folding pedal according to claim 6, characterized in that: Each worm gear has a long connecting arm on its side wall, and each long connecting arm has a left movable shaft at the end near the worm gear. The long connecting arm is movably connected to the worm gear through the left movable shaft.

8. The electric pallet truck with a folding pedal according to claim 7, characterized in that: Each of the long connecting arms has a short connecting arm at the end furthest from the worm gear, and each of the short connecting arms has a right movable shaft at the end closest to the long connecting arm, and the short connecting arm is movably connected to the long connecting arm through the right movable shaft.

9. An electric pallet trolley with a folding pedal according to claim 8, characterized in that: Each of the short connecting arms has a drive shaft fixedly installed at the end away from the long connecting arm, and the drive shaft is movably connected to the integrated frame and extends to the outside of the integrated frame. A brush holder is provided on the surface of the drive shaft.

10. An electric pallet trolley with a folding pedal according to claim 5, characterized in that: A PLC controller is installed at the top of the transport vehicle body, and the output terminal of the PLC controller is electrically connected to the input terminals of the electric push rod, the first servo motor, and the second servo motor.

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