Labor-saving steering mechanism of all-electric pallet truck

Abstract

The utility model relates to the technical field of logistics carrying equipment, and discloses a labor-saving steering mechanism of an all-electric pallet truck, which comprises a support frame, the top end of the support frame is fixedly connected with a protection mechanism, the bottom end of the protection mechanism is fixedly connected with two support blocks, one sides, close to each other, of the two support blocks are fixedly connected with a protection shell, and the protection shell is fixedly connected with the bottom end of the protection mechanism. A main gear is rotatably connected to the middle of the protective shell, a first connecting rod is fixedly connected to the exterior of the top end of the main gear, a connecting assembly used for driving the main gear to rotate is arranged at the end, away from the protective shell, of the first connecting rod, and a sliding rod is slidably connected to the interior of the protective shell. The front universal wheel and the rear universal wheel rotate in the same direction, so that the vehicle is more flexible in turning, an operator is helped to control the direction of the vehicle more easily, in addition, the operator can adjust the horizontal positions of the wheels through treading when needed, and the carrier is prevented from moving accidentally after being parked.

Description

Technical Field

[0001] The utility model relates to the technical field of logistics handling equipment, in particular to a labor-saving steering mechanism of a full-electric pallet truck. Background Art

[0002] Electric pallet trucks, also known as electric pallet jacks or electric transport trucks, are suitable for heavy-load and long-duration cargo transfers, significantly improving cargo handling efficiency and reducing labor intensity. Electric pallet trucks are a lightweight, compact, and industrial storage vehicle with widespread use both domestically and internationally and enormous market potential. They are battery-powered, DC-motor-driven, hydraulically operated, centrally controlled joysticks, and stand-up operation. They offer convenient, stable, and fast operation, compact size, and flexible operation. They are also quiet and low-emission, making them suitable for use in shopping malls, supermarkets, warehouses, freight yards, workshops, and other locations. They are particularly well-suited for light industries such as the food, textile, and printing industries.

[0003] A search revealed a Chinese patent application with publication number CN215558744U, which discloses an electric pallet truck comprising a frame, a drive mechanism, and an operating mechanism. A long-axis column is disposed between the drive mechanism and the operating mechanism. The frame comprises a frame, a face shield, a switch mask, and an upper mask. The face shield is mounted on the frame and is a hollow, enclosing frame with an opening at the top. The switch mask is adapted to and removably attachable to the top opening of the face shield. The switch mask has a switch mask opening, and the upper mask has an upper mask opening. The operating mechanism comprises a grip, a button mounting portion, and a handlebar. The button mounting portion is mounted between the two grips. The handlebar is mounted at the bottom of the button mounting portion. A handle connector is connected to the bottom of the handlebar. The switch mask opening and the upper mask opening are assembled to form a mounting position for the handle connector. This truck has an ingenious structure and is easy to assemble and disassemble, effectively improving assembly and disassembly efficiency, facilitating subsequent inspection and maintenance, and enhancing the user experience.

[0004] The aforementioned patent's specific embodiment states that "by providing a face shield 11, a switch shield 12, and an upper cover 13, during installation, the face shield 11, the switch shield 12, and the upper cover 13 can be assembled into a single unit, and then the assembled cover can be directly mounted on the transport vehicle. This is simple and convenient. When maintenance and repair of the electrical components within the cover are required, the switch shield or the upper cover can be removed as needed, effectively improving assembly and disassembly efficiency and enhancing the user experience." However, while the aforementioned document addresses the maintenance difficulties, the device still utilizes a traditional travel wheel + vertical drive motor wheel configuration. This traditional travel wheel + vertical drive motor wheel configuration is often laborious to steer, especially in confined spaces or where frequent turns are required. The operator requires considerable effort to control the vehicle's direction, which not only reduces operational efficiency but also increases the operator's labor intensity. Furthermore, when the transport vehicle stops moving, without effective positioning and fixing measures, it is prone to accidental movement, resulting in cargo damage or safety accidents. To address these issues, a labor-saving steering mechanism for a fully electric pallet truck is proposed.

[0005] Practical content

[0006] The purpose of the utility model is to address the deficiencies of the existing technology and provide a labor-saving steering mechanism for a fully electric pallet truck. The mechanism drives the universal wheel to steer coaxially through the main gear and raises the wheel against the ground with a stop plate, thereby achieving the functions of labor-saving steering and fixing the position of the truck, solving the problems of difficult steering and easy movement of the truck when transporting goods.

[0007] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0008] The top end of the support frame is fixedly connected to the protective mechanism, the bottom end of the protective mechanism is fixedly connected to two support blocks, the adjacent sides of the two support blocks are fixedly connected to the protective shell, the middle part of the protective shell is rotatably connected to the main gear, the top end of the main gear is fixedly connected to the connecting rod 1, the end of the connecting rod 1 away from the protective shell is provided with a connecting assembly for driving the main gear to rotate, the inside of the protective shell is slidably connected to the sliding rod, the middle part of the sliding rod is fixedly connected to the rack 1, the front and rear ends of the sliding rod are fixedly connected to the rack 2, the front and rear ends of the protective shell are rotatably connected to the slave gear, and the middle part of the slave gear is fixedly connected to the universal wheel;

[0009] As a further description of the above technical solution:

[0010] The connecting assembly includes a connecting shaft, the top end of the connecting shaft is fixedly connected to the middle of the end of the connecting rod away from the protective shell, the top end of the connecting shaft is fixedly connected to the outside of the connecting rod 2, a frame mechanism is provided on the right side of the protective mechanism, a movable slot is provided in the middle of the frame mechanism, and the top end of the frame mechanism is rotatably connected to a rocker;

[0011] As a further description of the above technical solution:

[0012] The bottom end of the support frame is fixedly connected to one side away from the protective mechanism with two driven wheels, the four corners of the bottom end of the support frame are fixedly connected to a limiting cylinder, the interior of the limiting cylinder is slidably connected to a limiting block, the middle part of the bottom end of the limiting block is fixedly connected to a connecting roller, the bottom end of the connecting roller is fixedly connected to a stop plate, the outside of the bottom end of the connecting roller is fixedly connected to two connecting rods, and the outside of the limiting cylinder is rotatably connected to a pedal;

[0013] As a further description of the above technical solution:

[0014] The outer teeth of the master gear mesh with the outer teeth of the rack 1, and the outer teeth of the slave gear mesh with the outer teeth of the rack 2;

[0015] As a further description of the above technical solution:

[0016] The top end of the rocker is fixedly connected with a hand grip;

[0017] As a further description of the above technical solution:

[0018] The outer portion of the connecting shaft is slidably connected to the inner wall of the movable groove, and the end of the second connecting rod away from the connecting shaft is fixedly connected to the outer portion of the rocker;

[0019] As a further description of the above technical solution:

[0020] The outer sleeve of the connecting roller is provided with a thrust spring, the top end of the thrust spring is fixedly connected to the bottom end of the limit block, and the bottom end of the thrust spring is fixedly connected to the bottom end of the inner wall of the limit cylinder;

[0021] As a further description of the above technical solution:

[0022] Two arc grooves are provided in the middle of the pedal, the outer portion of the connecting rod is slidably connected to the inner wall of the arc groove, and the outer portion of the connecting roller is slidably connected to the inner wall of the limiting cylinder.

[0023] The beneficial effects of the present invention are:

[0024] (1) When the user pulls the rocker to swing left and right, the utility model drives the connecting shaft through the connection of connecting rod 2, which pulls the main gear through connecting rod 1 to rotate around the middle of the protective shell, so that the protective shell engages with rack 1 and drives rack 2 to move forward and backward, so that rack 2 engages with the slave gear and drives the front and rear universal wheels to rotate in the same direction, making the vehicle more flexible when turning, especially in narrow spaces or places where frequent turns are required. It helps the operator to control the direction of the vehicle more easily and improves work efficiency.

[0025] (2) The utility model rotates with the support of the counter plate by stepping on the pedal, driving the connecting roller fixed to the counter plate to extend out of the limiting cylinder, so that the counter plate is lower than the height of the universal wheel and the driven wheel, so that the operator can adjust the horizontal position of the wheel by stepping on it when necessary, preventing the transport truck from moving accidentally after parking.

[0026] In summary, the utility model has the advantages of saving labor and being easy to fix.

[0027] Legend:

[0028] 1. Frame; 2. Protective mechanism; 3. Support block; 4. Protective shell; 5. Main gear; 6. Connecting rod 1; 7. Connecting shaft; 8. Connecting rod 2; 9. Sliding rod; 10. Rack 1; 11. Rack 2; 12. Slave gear; 13. Universal wheel; 14. Frame mechanism; 15. Movable slot; 16. Rocker; 17. Hand grip; 18. Driven wheel; 19. Limiting cylinder; 20. Limiting block; 21. Connecting roller; 22. Stop plate; 23. Thrust spring; 24. Connecting rod; 25. Pedal; 26. Arc slot BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a three-dimensional schematic diagram of a labor-saving steering mechanism of a fully electric pallet truck proposed in the present invention;

[0030] Figure 2 This is a schematic structural diagram of a protective shell of a labor-saving steering mechanism of a fully electric pallet truck proposed in the present invention;

[0031] Figure 3 This is a structural diagram of the coupling shaft of the labor-saving steering mechanism of a fully electric pallet truck proposed in the present invention;

[0032] Figure 4 This is a schematic structural diagram of the main gear of the labor-saving steering mechanism of a fully electric pallet truck proposed in the present invention;

[0033] Figure 5 This is a schematic diagram of the structure of the pedal of the labor-saving steering mechanism of the fully electric pallet truck proposed by the present invention;

[0034] Figure 6The utility model provides a schematic structural diagram of a limit cylinder of a labor-saving steering mechanism of a fully electric pallet truck. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, features defined as "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0037] Example 1

[0038] like Figures 1 to 3 As shown, this embodiment provides a labor-saving steering mechanism for a fully electric pallet truck.

[0039] The vehicle comprises a U-shaped support frame 1, which can be used to support cargo during transport. A protective mechanism 2 is fixedly connected to the top of the support frame 1. This mechanism serves as the lifting mechanism of the transport vehicle and protects internal components and drive components. The bottom of the protective mechanism 2 is fixedly connected to two support blocks 3. A protective shell 4 is fixedly connected to adjacent sides of the two support blocks 3, which support the protective shell 4 in the air.

[0040] Example 2

[0041] like Figure 3 、 Figure 4As shown, the components identical or corresponding to those in the first embodiment are designated by the corresponding reference numerals in the first embodiment. For simplicity, only the differences from the first embodiment are described below. The second embodiment differs from the first embodiment in that:

[0042] The middle portion of the protective housing 4 is rotatably connected to the main gear 5. This is a circular gear with a defined thickness and diameter. Its teeth are evenly distributed around the circumference, with either straight or helical teeth. The gear is typically made of high-strength metal and precision-machined. The top of the main gear 5 is fixedly connected to a connecting rod 6. The end of the connecting rod 6 facing away from the protective housing 4 is equipped with a connecting assembly that drives the rotation of the main gear 5. This connecting assembly includes a connecting shaft 7, the top of which is fixedly connected to the middle portion of the end of the connecting rod 6 facing away from the protective housing 4. The connecting rod 6 transmits the rotation of the main gear 5 to the connecting shaft 7, thus providing both connection and transmission.

[0043] Connecting rod 2 8 is fixedly connected to the top and exterior of coupling shaft 7, connecting connecting rod 1 6 and connecting rod 2 8. A sliding rod 9 is slidably connected to the interior of protective housing 4. Rack 1 10 is fixedly connected to the middle of sliding rod 9, and rack 2 11 is fixedly connected to the front and rear ends of sliding rod 9. Sliding rod 9 is a long metal rod with rack 10 fixed to the middle and rack 2 11 fixed to both ends. Slave gear 12 is rotatably connected to the front and rear ends of protective housing 4. Universal wheels 13 are fixedly connected to the middle of slave gear 12. The external teeth of master gear 5 mesh with those of rack 10, and the external teeth of slave gear 12 mesh with those of rack 2 11. Sliding rod 9 within protective housing 4 allows rack 10 to mesh with master gear 5, and rack 2 11 to mesh with slave gear 12, achieving synchronous steering of universal wheels 13.

[0044] A frame mechanism 14 is provided on the right side of the protective mechanism 2. A movable groove 15 is provided in the middle of the frame mechanism 14. A rocker 16 is rotatably connected to the top of the frame mechanism 14. The frame mechanism 14 is used to connect to the rocker 16 to help the rocker 16 drive the transport vehicle to move. A hand grip 17 is fixedly connected to the top of the rocker 16. The hand grip 17 is for the user to hold, making it convenient for the user to operate the rocker 16 and control the steering of the transport vehicle. The outside of the connecting shaft 7 is slidably connected to the inner wall of the movable groove 15. The movable groove 15 is used to limit the movable area of ​​the connecting shaft 7. The end of the connecting rod 2 8 away from the connecting shaft 7 is fixedly connected to the outside of the rocker 16, realizing the connection between the rocker 16 and the connecting rod 2 8, so that the rocker 16 can indirectly drive the main gear 5 to rotate.

[0045] Example 3

[0046] like Figure 5 、 Figure 6As shown, this embodiment provides a fixing method. Two driven wheels 18 are fixedly connected to the side of the bottom end of the support frame 1 away from the protective mechanism 2. The driven wheels 18 are composed of components such as a hub, a tire, and a bearing, and are linearly fixed wheels. A limiting cylinder 19 is fixedly connected to the four corners of the bottom end of the support frame 1. The inner portion of the limiting cylinder 19 is slidably connected to a limiting block 20. A connecting roller 21 is fixedly connected to the middle portion of the bottom end of the limiting block 20. The limiting cylinder 19 is used to provide sliding space for the limiting block 20, the connecting roller 21, and other components. The limiting block 20 slides within the limiting cylinder 19, connecting the connecting roller 21 and the thrust spring 23, thereby transmitting force.

[0047] The bottom end of the connecting roller 21 is fixedly connected to a support plate 22, which supports the ground. A spring 23 is sheathed around the outside of the connecting roller 21. The top end of the spring 23 is fixedly connected to the bottom end of the stop block 20, and the bottom end of the spring 23 is fixedly connected to the bottom end of the inner wall of the stop cylinder 19. The spring 23 is sheathed around the outside of the connecting roller 21, with one end connected to the stop block 20 and the other end connected to the bottom end of the inner wall of the stop cylinder 19. When the pedal 25 is not stepped on, the support plate 22 remains in its initial position. When stepped on, the pedal 25 is compressed, providing elastic force to return the support plate 22 to its original position.

[0048] The bottom end of the connecting roller 21 is fixedly connected to two connecting rods 24. The outside of the connecting roller 21 is slidably connected to the inner wall of the limit cylinder 19, and the outside is rotatably connected to the pedal 25. Two arc-shaped grooves 26 are provided in the middle of the pedal 25. The outside of the connecting rod 24 is slidably connected to the inner wall of the arc-shaped groove 26. The connecting rod 24 cooperates with the arc-shaped groove 26 on the pedal 25 to transmit the movement of the connecting roller 21 to the pedal 25, and also plays a role in limiting the movement range of the pedal 25. The arc-shaped groove 26 limits the movement trajectory of the connecting rod 24, thereby controlling the movement of the connecting roller 21 and the resistance plate 22.

[0049] Working steps

[0050] Step 1. When the user moves the transport vehicle, the rocker 16 can be pulled to swing left and right, and the rocker 16 can be connected with the connecting rod 2 8 to drive the connecting shaft 7 to slide along the movable groove 15 and synchronously drive the connecting rod 1 6 fixed at the other end of the connecting shaft 7 to pull the main gear 5 to rotate with the middle of the protective shell 4 as the center, so that the protective shell 4 rotates and engages the rack 10 at the same time, and the rack 10 slides left and right and synchronously drives the rack 2 11 to move and engage the slave gear 12 through the connection of the slide bar 9, so that the universal wheels 13 on both sides of the protective shell 4 can rotate in one direction, so that when the user pulls the wheel to turn, it can easily turn, and provide support for the wheel when turning, reducing the risk of skidding or tail swinging.

[0051] Step 2: When the transport truck stops moving or is transporting goods, the user can step on the pedal of the pedal 25 to drive the pedal 25 to rotate with the support of the plate 22, so that the bottom circular portion of the pedal 25 rotates downward through the arc groove 26 and the connecting roller 21, and the circular hook at the bottom circular portion of the pedal 25 abuts the top of the plate 22. At this time, the plate 22 is pushed out by the protruding circular hook of the pedal 25, synchronously driving the connecting rod 24, the connecting roller 21, and the limit block 20 to extend out of the limit cylinder 19, so that the plate 22 is lower than the horizontal plane of the universal wheel 13 and the driven wheel 18, raising the height of the universal wheel 13 and the driven wheel 18, stabilizing the position of the transport truck and fixing it in place to prevent the transport truck from moving accidentally after parking.

[0052] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A labor-saving steering mechanism for a fully electric pallet truck, comprising a support frame (1), characterized in that: The top of the support frame (1) is fixedly connected to a protective mechanism (2), the bottom of the protective mechanism (2) is fixedly connected to two support blocks (3), the adjacent sides of the two support blocks (3) are fixedly connected to a protective shell (4), the middle of the protective shell (4) is rotatably connected to a main gear (5), the top of the main gear (5) is fixedly connected to a connecting rod (6), the end of the connecting rod (6) away from the protective shell (4) is provided with a connecting assembly for driving the main gear (5) to rotate, the inside of the protective shell (4) is slidably connected to a slide bar (9), the middle of the slide bar (9) is fixedly connected to a rack bar (10), the front and rear ends of the slide bar (9) are fixedly connected to a rack bar (11), the front and rear ends of the protective shell (4) are rotatably connected to a slave gear (12), and the middle of the slave gear (12) is fixedly connected to a universal wheel (13).

2. The labor-saving steering mechanism of a fully electric pallet truck according to claim 1, characterized in that: The connecting assembly includes a connecting shaft (7), the top end of the connecting shaft (7) is fixedly connected to the middle of the end of the connecting rod (6) away from the protective shell (4), the top end of the connecting shaft (7) is fixedly connected to the outside of the connecting rod (8), a frame mechanism (14) is provided on the right side of the protective mechanism (2), a movable groove (15) is provided in the middle of the frame mechanism (14), and the top end of the frame mechanism (14) is rotatably connected to a rocker (16).

3. The labor-saving steering mechanism of a fully electric pallet truck according to claim 1, characterized in that: The bottom end of the support frame (1) is fixedly connected to one side away from the protective mechanism (2) with two driven wheels (18), the four corners of the bottom end of the support frame (1) are fixedly connected to a limiting cylinder (19), the interior of the limiting cylinder (19) is slidably connected to a limiting block (20), the middle of the bottom end of the limiting block (20) is fixedly connected to a connecting roller (21), the bottom end of the connecting roller (21) is fixedly connected to a stop plate (22), the bottom end of the connecting roller (21) is externally fixedly connected to two connecting rods (24), and the outside of the limiting cylinder (19) is rotatably connected to a pedal (25).

4. The labor-saving steering mechanism of a fully electric pallet truck according to claim 1, characterized in that: The external teeth of the main gear (5) are meshed with the external teeth of the rack 1 (10), and the external teeth of the slave gear (12) are meshed with the external teeth of the rack 2 (11).

5. The labor-saving steering mechanism of a fully electric pallet truck according to claim 2, characterized in that: The top end of the rocker (16) is fixedly connected to a hand grip (17).

6. The labor-saving steering mechanism of a fully electric pallet truck according to claim 2, characterized in that: The outside of the connecting shaft (7) is slidably connected to the inner wall of the movable groove (15), and the end of the second connecting rod (8) away from the connecting shaft (7) is fixedly connected to the outside of the rocker (16).

7. The labor-saving steering mechanism of a fully electric pallet truck according to claim 3, characterized in that: The outer sleeve of the connecting roller (21) is provided with a thrust spring (23), the top end of the thrust spring (23) is fixedly connected to the bottom end of the limiting block (20), and the bottom end of the thrust spring (23) is fixedly connected to the bottom end of the inner wall of the limiting cylinder (19).

8. The labor-saving steering mechanism of a fully electric pallet truck according to claim 3, characterized in that: Two arcuate grooves (26) are provided in the middle of the pedal (25); the outer portion of the connecting rod (24) is slidably connected to the inner wall of the arcuate groove (26); and the outer portion of the connecting roller (21) is slidably connected to the inner wall of the limiting cylinder (19).

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