A lifting linkage mechanism for a pallet jack

Abstract

The utility model discloses a lifting connecting rod mechanism of pallet carrier, including tray frame and protection frame, the outside of tray frame is provided with protection frame, the top of protection frame is installed with pull rod, the inside of protection frame is installed with lifting frame, the inside swing mounting of lifting frame has the hydraulic cylinder, the output of hydraulic cylinder swing mounting has the drive shaft, the inside swing mounting of lifting frame of drive shaft one side has the drive frame, the inside swing mounting of lifting frame of drive frame one side has the transmission shaft, and lifting frame is connected with drive frame swing through transmission shaft. The utility model not only has realized that pallet carrier is through lifting connecting rod mechanism and is stable to the goods and carries, has facilitated more stablely to the goods and carries, and has facilitated that pallet carrier is convenient and flexible steering, has facilitated that pallet carrier is convenient and removes, has reduced the labor intensity of manual pushing pallet carrier and removes.

Description

Technical Field

[0001] This utility model relates to the technical field of lifting linkage mechanisms, specifically a lifting linkage mechanism for a pallet transport vehicle. Background Technology

[0002] The lifting linkage mechanism of a pallet truck is a mechanical device connected by a lower pair. It is used to adjust the distance between the load-bearing wheel assembly and the rear frame drive wheel to ensure that the wheel assembly is always in contact with the ground during the lifting process, thereby improving the stability of the transport. In the actual production and manufacturing process of pallet trucks, due to factors such as unreasonable manufacturing, assembly and design, the assembly process of the product has been greatly complicated, which seriously affects the assembly efficiency and even the overall vehicle performance.

[0003] For example, the lifting linkage mechanism of a pallet truck disclosed in the authorization announcement number CN205367609U includes a lower linkage, a long linkage, and a connector. The lower linkage includes a middle crossbar and connecting plates at both ends. The connecting plates are hinged to the rear frame, the lifting frame, and the connector via pins. The connector includes a hinge and a movable rod. The hinge is hinged to the connecting plate, and one end of the movable rod is rotatably fixed to the hinge. One end of the long linkage is connected to the movable rod, and the other end is hinged to the load-bearing wheel assembly. The movable rod and the long linkage are adjustable.

[0004] Although it achieves a certain compensation effect for manufacturing and assembly errors due to the adjustable distance between the movable rod and the long connecting rod and the hinge, that is, the adjustable distance between the movable rod and the rear frame drive wheel, the lifting frame can balance the load-bearing wheel assembly and the rear frame drive wheel by adjusting the movable rod during the lifting process, so that the rollers of the load-bearing wheel assembly and the rear frame drive wheel are always in contact with the ground, thus improving the stability of the pallet truck lifting and transporting.

[0005] However, this does not solve the problem that existing lifting linkage mechanisms are generally not conducive to the stable handling of goods, affecting the stability of goods handling, making it difficult to turn flexibly and conveniently, and making it difficult to move pallet trucks easily, thus increasing the labor intensity of manually pushing pallet trucks. Utility Model Content

[0006] The purpose of this utility model is to provide a lifting linkage mechanism for a pallet truck, so as to solve the problems mentioned in the background art, which are that the lifting linkage mechanism is not convenient for stable handling of goods, affecting the stability of goods handling, not convenient and flexible steering, not convenient for the pallet truck to move, and affecting the labor intensity of manually pushing the pallet truck.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a lifting linkage mechanism for a pallet transport vehicle, comprising a pallet frame and a protective frame. The protective frame is externally mounted on the pallet frame, and a pull rod is installed at the top of the protective frame. A lifting frame is installed inside the protective frame, and a hydraulic cylinder is movably mounted inside the lifting frame. A drive shaft is movably mounted at the output end of the hydraulic cylinder. A drive frame is movably mounted inside the lifting frame on one side of the drive shaft, and a transmission shaft is movably mounted inside the lifting frame on the other side of the drive frame. The lifting frame is movably connected to the drive frame via the transmission shaft. A moving rod is movably mounted on the outer wall of the drive frame. The power frame has a hinge shaft movably mounted on its outer wall near the drive frame, and the power frame is movably connected to the drive frame via the hinge shaft. A limit arm is symmetrically arranged inside the lifting frame on one side of the drive frame. A limit shaft is installed inside each lifting frame near the limit arm, and the lifting frame is movably connected to the limit arm via the limit shaft. A power shaft is movably mounted on the outer wall of each limit arm near the power frame, and the limit arm is movably connected to the power frame via the power shaft. A fixed shaft is installed on the outer wall of the pallet frame, and a pull arm is symmetrically and movably fitted onto the surface of the fixed shaft. A fixing block is provided between the two sides of the pull arm.

[0008] Preferably, a first shaft is installed on the outer wall of the fixed block near the pull arm, and the pull arm is movably connected to the fixed block through the first shaft. The fixed block is connected to the lifting frame, and a transmission arm is movably installed at the bottom end of the pull arm.

[0009] Preferably, a second shaft is movably mounted on the outer wall of the transmission arm near the pull arm, and the pull arm is movably connected to the transmission arm through the second shaft. A third shaft is movably mounted on the end of the transmission arm away from the second shaft.

[0010] Preferably, limiting seats are symmetrically installed at the bottom end of the pallet frame on one side of the third axis, and a flipping shaft is movably installed between both sides of the limiting seats.

[0011] Preferably, each of the surfaces of the flipping shaft is symmetrically fitted with a lifting arm, and the lifting arm is movably connected to the third shaft.

[0012] Preferably, a fixed arm is movably installed on the outer wall of the lifting arm, and a fourth shaft is movably installed on the outer wall of the fixed arm near the lifting arm. The lifting arm is movably connected to the fixed arm through the fourth shaft, and movable wheels are symmetrically installed between the two sides of the fixed arm.

[0013] Preferably, a battery is installed inside the protective frame on one side of the lifting frame, and a rotating shaft is movably installed at the bottom of the lifting frame, with the rotating shaft extending to the outside of the protective frame.

[0014] Preferably, a driven gear is fitted on the surface of the rotating shaft, a power motor is installed inside the protective frame on one side of the driven gear, and a driving gear is installed at the output end of the power motor, and the driving gear meshes with the driven gear.

[0015] Preferably, a rotating frame is provided outside the protective frame below the rotating shaft, and the rotating shaft is connected to the rotating frame. An electric wheel is movably installed at the bottom end of the rotating frame.

[0016] Preferably, a control panel is installed on the outer wall of the pull rod, and the output end of the control panel is electrically connected to the input end of the hydraulic cylinder, the power motor, and the electric wheel.

[0017] Compared with the prior art, the beneficial effects of this utility model are: the lifting linkage mechanism not only enables the pallet truck to stably transport goods through the lifting linkage mechanism, making it more convenient to transport goods more stably, but also facilitates the convenient and flexible turning of the pallet truck, making it easier to move the pallet truck and reducing the labor intensity of manually pushing the pallet truck.

[0018] (1) The hydraulic cylinder drives the drive frame to rotate around the transmission shaft via the drive shaft. The drive frame drives the power frame to rotate via the hinge shaft. The limit arm limits the power frame via the power shaft to ensure that the power frame always moves horizontally. The power frame drives the pallet frame to move. The pallet frame drives the fixed shaft to move. The fixed shaft drives the two sets of pull arms to rotate around the first shaft. The pull arms drive the transmission arm to move via the second shaft. The transmission arm drives the lifting arm to rotate around the tilting shaft via the third shaft. The lifting arm drives the fixed arm to rotate via the fourth shaft. The fixed arm drives the two sets of movable wheels to rotate to ensure that the two sets of movable wheels rotate to the appropriate position. This enables the pallet truck to stably transport goods via the lifting linkage mechanism, making it easier to transport goods more stably and improving the convenience of using the pallet truck.

[0019] (2) The power motor drives the drive gear to rotate, the drive gear drives the driven gear to rotate, the driven gear drives the rotating shaft to rotate, the rotating shaft drives the rotating frame to rotate, the rotating frame drives the electric wheel to rotate to the appropriate position, and the electric wheel rotates to facilitate the convenient movement of the pallet frame, realizing the convenient and flexible steering of the pallet truck, facilitating the convenient movement of the pallet truck, and reducing the labor intensity of manually pushing the pallet truck. Attached Figure Description

[0020] Figure 1 This is a front view structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the present invention; Figure 3 This is a three-dimensional structural diagram of the drive frame of this utility model; Figure 4 This is a three-dimensional structural diagram of the transmission arm of this utility model; Figure 5 This is a three-dimensional structural diagram of the protective frame of this utility model; Figure 6 This is a three-dimensional structural diagram of the limiting arm of this utility model; Figure 7 This is a three-dimensional structural diagram of the movable wheel of this utility model; Figure 8 This is a three-dimensional structural diagram of the pallet rack of this utility model.

[0021] In the diagram: 1. Pallet frame; 2. Protective frame; 3. Lifting frame; 4. Pull rod; 5. Control panel; 6. Hydraulic cylinder; 7. Drive shaft; 8. Drive frame; 9. Transmission shaft; 10. Limiting shaft; 11. Limiting arm; 12. Power shaft; 13. Hinge shaft; 14. Power frame; 15. Fixed shaft; 16. Fixed block; 17. First shaft; 18. Pull arm; 19. Second shaft; 20. Transmission arm; 21. Third shaft; 22. Limiting seat; 23. Tilting shaft; 24. Lifting arm; 25. Fixed arm; 26. Movable wheel; 27. Battery; 28. Rotating shaft; 29. ​​Rotating frame; 30. Electric wheel; 31. Drive gear; 32. Driven gear; 33. Power motor; 34. Fourth shaft. Detailed Implementation

[0022] 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.

[0023] 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.

[0024] 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.

[0025] Example 1 Please see Figure 1-8 This utility model provides an embodiment of a lifting linkage mechanism for a pallet transport vehicle, comprising a pallet frame 1 and a protective frame 2. The protective frame 2 is provided on the outside of the pallet frame 1, and a pull rod 4 is installed at the top of the protective frame 2. A lifting frame 3 is installed inside the protective frame 2, and a hydraulic cylinder 6 is movably installed inside the lifting frame 3. A drive shaft 7 is movably installed at the output end of the hydraulic cylinder 6. A drive frame 8 is movably installed inside the lifting frame 3 on one side of the drive shaft 7, and a transmission shaft 9 is movably installed inside the lifting frame 3 on one side of the drive frame 8. The lifting frame 3 is movably connected to the drive frame 8 via the transmission shaft 9. The outer wall of the drive frame 8... A power frame 14 is movably mounted. A hinge shaft 13 is movably mounted on the outer wall of the power frame 14 near the drive frame 8, and the power frame 14 is movably connected to the drive frame 8 via the hinge shaft 13. Limiting arms 11 are symmetrically arranged inside the lifting frame 3 on one side of the drive frame 8. Limiting shafts 10 are installed inside each lifting frame 3 near the limiting arm 11, and the lifting frame 3 is movably connected to the limiting arm 11 via the limiting shaft 10. A power shaft 12 is movably mounted on the outer wall of each limiting arm 11 near the power frame 14, and the limiting arm 11 is movably connected to the power frame 14 via the power shaft 12. The outer wall of the pallet frame 1... A fixed shaft 15 is installed, and a pull arm 18 is symmetrically and movably fitted onto the surface of the fixed shaft 15. A fixing block 16 is provided between the two sides of the pull arm 18. A first shaft 17 is installed on the outer wall of the fixing block 16 near the pull arm 18, and the pull arm 18 is movably connected to the fixing block 16 via the first shaft 17. The fixing block 16 is connected to the lifting frame 3. A transmission arm 20 is movably installed at the bottom end of each pull arm 18. A second shaft 19 is movably installed on the outer wall of each transmission arm 20 near the pull arm 18, and the pull arm 18 is movably connected to the transmission arm 20 via the second shaft 19. The transmission arm 20 is located away from the second shaft 19. A third shaft 21 is movably installed at one end. A limit seat 22 is symmetrically installed at the bottom of the tray frame 1 on one side of the third shaft 21. A flip shaft 23 is movably installed between the two sides of the limit seat 22. A lifting arm 24 is symmetrically fitted on the surface of the flip shaft 23. The lifting arm 24 is movably connected to the third shaft 21. A fixed arm 25 is movably installed on the outer wall of the lifting arm 24. A fourth shaft 34 is movably installed on the outer wall of the fixed arm 25 near the lifting arm 24. The lifting arm 24 is movably connected to the fixed arm 25 through the fourth shaft 34. A movable wheel 26 is symmetrically installed between the two sides of the fixed arm 25. Operating control panel 5 opens hydraulic cylinder 6. Under the movable support of lifting frame 3, hydraulic cylinder 6 drives drive frame 8 to rotate around transmission shaft 9 via drive shaft 7. Drive frame 8 drives power frame 14 to rotate via hinge shaft 13. Under the limitation of limit arm 11 by limit shaft 10, limit arm 11 limits power frame 14 via power shaft 12 to ensure that power frame 14 always moves horizontally. Power frame 14 drives pallet frame 1 to move. Pallet frame 1 drives fixed shaft 15 to move. Fixed shaft 15 drives two sets of pull arms 18 to rotate around first shaft 17. Fixed block 16 is positioned relative to first shaft 17. 17 provides support, the pull arm 18 drives the transmission arm 20 to move via the second shaft 19, the transmission arm 20 drives the lifting arm 24 to rotate around the tilting shaft 23 via the third shaft 21, the limit seat 22 provides movable support for the tilting shaft 23, the lifting arm 24 drives the fixed arm 25 to rotate via the fourth shaft 34, the fixed arm 25 drives the two sets of movable wheels 26 to rotate, so that the two sets of movable wheels 26 can rotate to the appropriate position, thus realizing the stable handling of goods by the pallet truck through the lifting linkage mechanism, which facilitates more stable handling of goods and improves the convenience of using the pallet truck; A battery 27 is installed inside the protective frame 2 on one side of the lifting frame 3. A rotating shaft 28 is movably installed at the bottom of the lifting frame 3 and extends to the outside of the protective frame 2. A driven gear 32 is fitted on the surface of the rotating shaft 28. A power motor 33 is installed inside the protective frame 2 on one side of the driven gear 32. A drive gear 31 is installed at the output end of the power motor 33 and meshes with the driven gear 32. A rotating frame 29 is provided outside the protective frame 2 below the rotating shaft 28 and is connected to the rotating shaft 28. An electric wheel 30 is movably installed at the bottom of the rotating frame 29. A control panel 5 is installed on the outer wall of the pull rod 4 and the output end of the control panel 5 is electrically connected to the input end of the hydraulic cylinder 6, the power motor 33, and the electric wheel 30. When a turn is required, operate the control panel 5 to turn on the power motor 33. With the support of the protective frame 2, the power motor 33 drives the drive gear 31 to rotate. Under the meshing of the drive gear 31 and the driven gear 32, the drive gear 31 drives the driven gear 32 to rotate. The driven gear 32 drives the rotating shaft 28 to rotate. The protective frame 2 and the lifting frame 3 provide movable support for the rotating shaft 28. The rotating shaft 28 drives the rotating frame 29 to rotate. The rotating frame 29 drives the electric wheel 30 to rotate to a suitable position. Operate the control panel 5 to turn on the electric wheel 30. With the movable support of the rotating frame 29, the electric wheel 30 rotates to facilitate the convenient movement of the pallet frame 1. The battery 27 provides power to the power motor 33 and the electric wheel 30, realizing convenient and flexible turning of the pallet truck, facilitating the convenient movement of the pallet truck, and reducing the labor intensity of manually pushing the pallet truck.

[0026] Work steps Hydraulic cylinder 6 drives drive frame 8 to rotate around transmission shaft 9 via drive shaft 7. Drive frame 8 drives power frame 14 to rotate via hinge shaft 13. Limiting arm 11 limits power frame 14 via power shaft 12 to ensure that power frame 14 always moves horizontally. Power frame 14 drives pallet frame 1 to move. Pallet frame 1 drives fixed shaft 15 to move. Fixed shaft 15 drives two sets of pull arms 18 to rotate around first shaft 17. Pull arms 18 drive transmission arm 20 to move via second shaft 19. Transmission arm 20 drives lifting arm 24 around tilting shaft 23 via third shaft 21. The lifting arm 24 rotates, driving the fixed arm 25 to rotate via the fourth shaft 34. The fixed arm 25 drives the two sets of movable wheels 26 to rotate, facilitating the rotation of the two sets of movable wheels 26 to the appropriate position. The power motor 33 drives the drive gear 31 to rotate, which in turn drives the driven gear 32 to rotate. The driven gear 32 drives the rotating shaft 28 to rotate, which in turn drives the rotating frame 29 to rotate. The rotating frame 29 drives the electric wheel 30 to rotate to the appropriate position, facilitating the convenient movement of the pallet frame 1 by the electric wheel 30, thus completing the operation of the lifting linkage mechanism.

[0027] 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. A lifting linkage mechanism for a pallet transport vehicle, characterized in that: The device includes a pallet frame and a protective frame. The protective frame is externally mounted on the pallet frame, and a pull rod is mounted on the top of the protective frame. A lifting frame is installed inside the protective frame, and a hydraulic cylinder is movably mounted inside the lifting frame. A drive shaft is movably mounted on the output end of the hydraulic cylinder. A drive frame is movably mounted inside the lifting frame on one side of the drive shaft, and a transmission shaft is movably mounted inside the lifting frame on the other side of the drive frame. The lifting frame is movably connected to the drive frame via the transmission shaft. A power frame is movably mounted on the outer wall of the drive frame, with the power frame located on the outer wall near the drive frame. The upper part is equipped with a hinge shaft, and the power frame is movably connected to the drive frame through the hinge shaft. The lifting frame on one side of the drive frame is symmetrically provided with limit arms. The lifting frame near the limit arm is equipped with a limit shaft, and the lifting frame is movably connected to the limit arm through the limit shaft. The outer wall of the limit arm near the power frame is movably equipped with a power shaft, and the limit arm is movably connected to the power frame through the power shaft. The outer wall of the pallet frame is equipped with a fixed shaft. The surface of the fixed shaft is symmetrically and movably fitted with a pull arm. A fixing block is provided between the two sides of the pull arm.

2. The lifting linkage mechanism of a pallet transport vehicle according to claim 1, characterized in that: Each of the fixed blocks has a first shaft installed on the outer wall near the pull arm, and the pull arm is movably connected to the fixed block through the first shaft. The fixed block is also connected to the lifting frame. A transmission arm is movably installed at the bottom end of each pull arm.

3. The lifting linkage mechanism of a pallet transport vehicle according to claim 2, characterized in that: A second shaft is movably mounted on the outer wall of the transmission arm near the pull arm, and the pull arm is movably connected to the transmission arm through the second shaft. A third shaft is movably mounted on the end of the transmission arm away from the second shaft.

4. The lifting linkage mechanism of a pallet transport vehicle according to claim 3, characterized in that: A limiting seat is symmetrically installed at the bottom of the pallet frame on one side of the third axis, and a flipping shaft is movably installed between both sides of the limiting seat.

5. The lifting linkage mechanism of a pallet transport vehicle according to claim 4, characterized in that: The surfaces of the flipping shafts are symmetrically fitted with lifting arms, and the lifting arms are movably connected to the third shaft.

6. The lifting linkage mechanism of a pallet transport vehicle according to claim 5, characterized in that: Fixed arms are movably mounted on the outer wall of the lifting arm. A fourth shaft is movably mounted on the outer wall of the fixed arm near the lifting arm. The lifting arm is movably connected to the fixed arm through the fourth shaft. Movable wheels are symmetrically mounted between the two sides of the fixed arm.

7. The lifting linkage mechanism of a pallet transport vehicle according to claim 1, characterized in that: A battery is installed inside the protective frame on one side of the lifting frame, and a rotating shaft is movably installed at the bottom of the lifting frame, extending to the outside of the protective frame.

8. The lifting linkage mechanism of a pallet transport vehicle according to claim 7, characterized in that: A driven gear is fitted onto the surface of the rotating shaft. A power motor is installed inside the protective frame on one side of the driven gear. A driving gear is installed at the output end of the power motor, and the driving gear meshes with the driven gear.

9. The lifting linkage mechanism of a pallet transport vehicle according to claim 7, characterized in that: A rotating frame is provided outside the protective frame below the rotating shaft, and the rotating shaft is connected to the rotating frame. An electric wheel is movably installed at the bottom of the rotating frame.

10. The lifting linkage mechanism of a pallet transport vehicle according to claim 1, characterized in that: A control panel is installed on the outer wall of the pull rod, and the output end of the control panel is electrically connected to the input end of the hydraulic cylinder, the power motor, and the electric wheel.

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