Tray lifting equipment

Abstract

The tray lifting equipment comprises a base, symmetrical supporting rods are fixedly connected to the upper end of the base, the upper ends of the symmetrical supporting rods are jointly and fixedly connected with a fixing plate, a lifting plate is arranged in the middle of the upper end of the base in an attached mode, and a tray is placed above the lifting plate; a lifting device used for lifting the lifting plate is arranged in the middle of the upper end of the fixing plate, the lifting device comprises symmetrical steel wire ropes, the lower ends of the symmetrical steel wire ropes are fixedly connected with the lifting plate, and a conveying frame is fixedly connected to one side of the base; a plurality of positioning mechanisms used for limiting the lifting plate are arranged on the sides, close to the lifting plate, of the symmetrical supporting rods away from the conveying frame. Through cooperation of the positioning blocks and the positioning grooves, in the process that the lifting plate drives the trays to move upwards, the positioning blocks move upwards on the lifting plate so that the positions of the trays can correspond to the positions of the storage plates in the inner cavity of the goods shelf, and therefore the positions of the trays and the positions of the storage plates can be conveniently and rapidly aligned.

Description

Technical Field

[0001] The invention relates to the technical field of storage and transportation, in particular to a pallet lifting device. Background Art

[0002] Pallet lifts generally refer to large-scale mechanical equipment with high power and strong lifting capacity. The transportation process is completed by dragging the flexible wire rope and the transported goods up and down through the power machinery.

[0003] For example, Chinese patent publication number: CN117003005A discloses a device, method and pallet for separating pallet cargo, which relates to the field of storage and transportation technology to solve the problem of separating pallet cargo and transporting them separately. The device for separating pallet cargo includes: a separation device, a conveying device, a lifting device and a pallet.

[0004] In this solution, the pallet and the goods are lifted by a lifting platform, thereby driving the pallet and the goods to move up synchronously, and then aligning the goods with the storage partitions on the shelves, and transporting the goods to the shelves. However, in the process of lifting the goods and moving the goods in the vertical direction, the position of the lifting platform needs to be adjusted to align the goods with the storage partitions. This results in a lot of time being spent on aligning the position of the goods during use, and will increase the wear of the parts used for transmission. Summary of the invention

[0005] The object of the present invention is to provide a pallet lifting device to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A pallet lifting device comprises a base, the upper end of the base is fixedly connected with symmetrical support rods, the upper ends of the symmetrical support rods are commonly fixedly connected with a fixing plate, a lifting plate is fittedly arranged in the middle of the upper end of the base, a pallet is placed above the lifting plate, and a lifting device for lifting the lifting plate is arranged in the middle of the upper end of the fixing plate, the lifting device comprises symmetrical steel wire ropes, the lower ends of the symmetrical steel wire ropes are fixedly connected to the lifting plate, one side of the base is fixedly connected with a conveying frame, and a plurality of positioning mechanisms for limiting the lifting plate are arranged on the side of the symmetrical support rods away from the conveying frame close to the lifting plate, and when the lifting device winds the steel wire rope, the steel wire rope drives the lifting plate to move vertically upward and continuously approaches the lower end surface of the positioning mechanism.

[0008] As a further solution of the present invention: a symmetrical mounting plate is fixedly connected to the middle part of the upper end of the fixed plate, a winding rod is symmetrically connected between the mounting plates for common rotation, the ends of the symmetrical steel wire ropes away from the lifting plate are both wound around the outer wall of the winding rod, a driven gear is fixedly connected to the middle part of the outer wall of the winding rod, a servo motor is transmission-connected to the side of the upper end of the fixed plate close to the conveying frame, a driving gear is fixedly connected to the output end of the servo motor, the driving gear and the driven gear are meshed with each other, a transmission roller is transmission-connected to the middle part of the upper end of the lifting plate and the conveying frame, a shelf is closely provided on the side of the base away from the conveying frame, a plurality of cross bars are fixedly connected to the outer wall of the shelf by threads, a plurality of positioning holes are provided at the upper end of the cross bars, and a plurality of connecting keys are provided between the symmetrical cross bars located on the same horizontal plane.

[0009] As a further solution of the present invention: the positioning mechanism includes a mounting block, and a groove for cooperating with the mounting block is formed on the side wall of the symmetrical support rod close to the shelf, the mounting block is fixedly connected in the groove, a fixing block is fixedly connected to the side of the mounting block close to the transmission roller, a positioning block is fittedly provided on the side of the fixing block close to the lifting plate, a rotating rod is rotatably connected to the side of the fixing block close to the positioning block, an outer wall of the rotating rod is fixedly connected to the side of the positioning block close to the fixed block, an end of the rotating rod away from the fixed block is rotatably connected to the mounting block, and the height of the fixing block is the same as the height of the positioning block.

[0010] As a further solution of the present invention: an arc-shaped groove is provided on the side wall of the mounting block, a slider is slidably connected to the middle part of the inner cavity of the arc-shaped groove, one end of the slider away from the arc-shaped groove is fixedly connected to the middle part of one side of the positioning block close to the mounting block, and the lower end of the slider is elastically connected to the bottom of the inner cavity of the arc-shaped groove by a spring.

[0011] As a further solution of the present invention: a driving block is vertically slidably connected to a side of the upper end of the fixed block close to the rotating rod, a slope is provided on a side of the driving block close to the positioning block, a slot is provided in the middle of a side of the rotating rod close to the driving block, a locking block is snap-fitted in the inner cavity of the slot, a driven block is fixedly connected to an end of the locking block away from the slot, both the locking block and the driven block are horizontally slidably connected to the inner cavity of the fixed block, driven grooves are provided on both side walls on the upper side of the driven block, driven rods are fixedly connected to both sides of the lower part of the inner cavity of the driving block, and the end of the driven rod away from the driving block is slidably fitted with the driven grooves.

[0012] As a further solution of the present invention: a slide groove is provided in the middle part of the upper end of the mounting block, and an adjustment plate is horizontally slidably connected to the inner cavity of the slide groove, and the adjustment plate is horizontally slidably connected to the inner cavity of the support rod, and an electric push rod is commonly transmission-connected between the middle part of the end of the adjustment plate away from the mounting block and the inner cavity side wall of the support rod, and an adjustment gear is fixedly connected to the end of the rotating rod away from the slot, and an adaptation groove is provided inside the mounting block, and the position of the adaptation groove corresponds to the adjustment gear, and a driven plate is provided on the side of the adjustment gear close to the slide groove, and the driven plate is vertically slidably connected to the adaptation groove, and a rack is fixedly connected to the side of the driven plate close to the adjustment gear, and the rack and the adjustment gear are meshed with each other.

[0013] As a further solution of the present invention: a moving block is horizontally slidably connected to the middle part of the inner cavity of the slide groove, and a driving rod is slidably connected to the side of the moving block close to the driven plate, a driving groove is provided on the side of the driven plate close to the moving block, an L-shaped groove is provided at one end of the driving groove, and the end of the driving rod away from the moving block is slidably matched with the driving groove and the L-shaped groove, the L-shaped groove is composed of a horizontal groove and a vertical groove, and the connection between the driving groove and the horizontal groove and the vertical groove is fixedly connected with an inclined block.

[0014] As a further solution of the present invention: a plurality of adjustment grooves are provided on the side wall of the adjustment plate, the positions and numbers of the adjustment grooves correspond to the mounting blocks, a first balancing groove is provided at the lower end of the adjustment groove, a second balancing groove is provided at the upper end of the adjustment groove, the horizontal lengths of the plurality of the first balancing grooves increase as the distance between the plurality of the first balancing grooves and the base increases, while the horizontal lengths of the plurality of the second balancing grooves decrease as the distance between the plurality of the second balancing grooves and the base increases.

[0015] As a further solution of the present invention: a connecting rod is vertically slidably connected to one side of the slide groove close to the fixed block, the center positions of multiple connecting rods are all located in the same vertical plane, and a movable rod is fixedly connected to one end of the connecting rod away from the fixed block, and the movable rod is slidably matched with the adjustment groove, the first balance groove, and the second balance groove.

[0016] As a further solution of the present invention: a traction rope is fixedly connected to the top of the inner cavity of the driving block, and the end of the traction rope away from the driving block passes through the driven block, the fixed block and the mounting block and is fixedly connected to the connecting rod, and the driven block, the fixed block, the mounting block and the connecting rod are all provided with grooves for cooperating with the traction rope.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] Through the cooperation of the positioning block and the positioning groove, in the process of the lifting plate driving the pallet to move upward, the positioning block now moves the lifting plate upward so that the position of the pallet corresponds to the position of the storage plate in the inner cavity of the shelf, thereby facilitating the rapid alignment of the positions of the pallet and the storage plate, and transporting the pallet to the shelf through the transmission roller, and after the pallet contacts the driving block, the positioning block rotates upward under the action of elastic force, so that when the lifting plate moves up again, the positioning block that has been in contact with it will no longer hinder the upward movement of the lift. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 It is a structural schematic diagram of the support rod in the present invention.

[0021] Figure 3 For the present invention Figure 1 Schematic diagram of the structure of area A.

[0022] Figure 4 It is a structural schematic diagram of the lifting plate in the present invention.

[0023] Figure 5 It is a structural schematic diagram of the installation block in the present invention.

[0024] Figure 6 It is a structural schematic diagram of the driven block in the present invention.

[0025] Figure 7 It is a structural schematic diagram of the arc groove in the present invention.

[0026] Figure 8 It is a schematic diagram of the structure of the adjustment plate in the present invention.

[0027] Fig. 9 It is a schematic diagram of the structure of the adjustment tank in the present invention.

[0028] Fig.10 It is a structural schematic diagram of the steering gear in the present invention.

[0029] Fig.11 It is a structural schematic diagram of the driven plate in the present invention.

[0030] Fig.12 It is a schematic diagram of the structure of the moving block in the present invention.

[0031] In the figure: 1, base; 2, support rod; 3, shelf; 4, connecting key; 5, conveyor frame; 6, lifting plate; 7, mounting plate; 8, servo motor; 9, driving gear; 10, driven gear; 11, transmission roller; 12, wire rope; 13, driving rod; 14, driving groove; 15, L-shaped groove; 16, positioning block; 17, positioning groove; 18, fixing block; 19, mounting block; 20, arc groove; 21, slider ; 22. rotating rod; 23. slot; 24. block; 25. driven block; 26. driving block; 27. traction rope; 28. driven slot; 29. ​​driven rod; 30. adjusting plate; 31. adjusting slot; 32. first balancing slot; 33. second balancing slot; 34. connecting rod; 35. movable rod; 36. slide slot; 37. driven plate; 38. rack; 39. adjustment gear; 40. moving block; 41. inclined block. DETAILED DESCRIPTION

[0032] See also Figure 1-Figure 2 In an embodiment of the present invention, a pallet lifting device includes a base 1, the upper end of the base 1 is fixedly connected with symmetrical support rods 2, the upper ends of the symmetrical support rods 2 are commonly fixedly connected with a fixed plate, a lifting plate 6 is fittedly arranged in the middle of the upper end of the base 1, a pallet is placed above the lifting plate 6, and a lifting device for lifting the lifting plate 6 is arranged in the middle of the upper end of the fixed plate, the lifting device includes symmetrical steel wire ropes 12, the lower ends of the symmetrical steel wire ropes 12 are fixedly connected to the lifting plate 6, a conveying frame 5 is fixedly connected to one side of the base 1, and the pallet can be driven to move in the horizontal direction through the conveying frame 5, and a plurality of positioning mechanisms for limiting the lifting plate 6 are arranged on the side of the symmetrical support rods 2 close to the lifting plate 6 away from the conveying frame 5, when the lifting device winds the steel wire rope 12, the steel wire rope 12 will drive the lifting plate 6 to move vertically upward and continuously approach the lower end surface of the positioning mechanism.

[0033] See also Figure 3A symmetrical mounting plate 7 is fixedly connected to the middle of the upper end of the fixed plate, and a winding rod is connected to the symmetrical mounting plates 7 for common rotation. The ends of the symmetrical steel wire ropes 12 away from the lifting plate 6 are all wound around the outer wall of the winding rod, and a driven gear 10 is fixedly connected to the middle of the outer wall of the winding rod. A servo motor 8 is transmission-connected to one side of the upper end of the fixed plate close to the conveying frame 5, and a driving gear 9 is fixedly connected to the output end of the servo motor 8. The driving gear 9 and the driven gear 10 are meshed with each other, that is, when the servo motor 8 drives the driving gear 9 to rotate, the driving gear 9 is It will drive the winding rod to rotate synchronously, so that the wire rope 12 is continuously wound around the outer wall of the winding rod, and then the lifting plate 6 is pulled upward, thereby driving the pallet and goods above the lifting plate 6 to move upward synchronously. The lifting plate 6 and the middle part of the upper end of the conveying frame 5 are both connected with a transmission roller 11. The transmission roller 11 can transport the pallet above the conveying frame 5 to the top of the lifting plate 6, and after the lifting plate 6 moves vertically to the specified height, the transmission roller 11 is used again to drive the pallet and goods to move horizontally, thereby completing the transfer of the pallet and goods.

[0034] See also Figure 1 and Figure 4 The rack 3 is provided on the side of the base 1 away from the conveying frame 5. The outer wall of the rack 3 is fixedly connected with multiple cross bars by threads. Multiple positioning holes are opened at the upper ends of the cross bars. Multiple connecting keys 4 are provided between the symmetrical cross bars on the same horizontal plane. The two ends of the connecting keys 4 are engaged with the cross bars by pins and positioning holes, so as to complete the fixing and disassembly. After the lifting plate 6 rises, the pallet and the goods can be driven to move horizontally to the top of the multiple connecting keys 4 by the transmission roller 11, so that the pallet and the goods can be transported to the top of the connecting keys 4 from low to high in sequence. The pallet and the goods can be stably stored by the common supporting effect of the multiple connecting keys 4, and when there are no pallets and goods to be stored, the connecting keys 4 can be removed from the cross bars, so that the inner cavity of the rack 3 is in a hollow state, so that multiple racks 3 can be stored in an overlapping manner, which saves the placement space of the rack 3 and facilitates the transportation of the rack 3.

[0035] See also Figure 5 and Figure 7The positioning mechanism includes a mounting block 19. A groove for matching the mounting block 19 is provided on the side wall of the symmetrical support rod 2 near the shelf 3. The mounting block 19 is fixedly connected in the groove. A fixing block 18 is fixedly connected to the side of the mounting block 19 near the transmission roller 11. A positioning block 16 is fitted on the side of the fixing block 18 near the lifting plate 6. A rotating rod 22 is rotatably connected to the side of the fixing block 18 near the positioning block 16. The outer wall of the rotating rod 22 is fixedly connected to the side of the positioning block 16 near the fixing block 18. The rotating rod 22 The end away from the fixed block 18 is rotatably connected to the mounting block 19, and the lower end of the fixed block 18 is fitted with the positioning block 16, so that the upper end surface of the positioning block 16 coincides with the upper end surface of the fixed block 18, and the lower end surface of the positioning block 16 coincides with the lower end surface of the fixed block 18. The side wall of the mounting block 19 is provided with an arc groove 20, and the middle part of the inner cavity of the arc groove 20 is slidably connected with a slider 21. The end of the slider 21 away from the arc groove 20 is fixedly connected to the middle part of one side of the positioning block 16 close to the mounting block 19, and the slider 21 is The lower end is elastically connected to the bottom of the inner cavity of the arc groove 20 by a spring. Under the action of the elastic force, the slider 21 can slide in the inner cavity of the arc groove 20, so that the positioning block 16 can rotate 90° upward in the direction of the fixed block 18 without being restricted. A symmetrical positioning groove 17 is provided on the side of the upper end of the lifting plate 6 close to the fixed block 18. The position of the positioning groove 17 corresponds to the position of the positioning block 16 in the horizontal state, that is, in the process of the lifting plate 6 moving up, the positioning groove 17 will approach the position of the positioning block 16 and contact it. The positioning block 16 will block and position the position of the lifting plate 6 by contacting the positioning groove 17. After the positioning block 16 contacts the bottom of the inner cavity of the positioning groove 17, the plane where the upper end surface of the lifting plate 6 is located coincides with the plane where the upper end surface of the positioning block 16 is located, and the positions of the multiple connecting keys 4 correspond to the positions of the multiple fixed blocks 18. At this time, the driving roller 11 can be driven to rotate to push the pallet and the goods to move synchronously toward the shelf 3 to the upper end surface of the connecting key 4.

[0036] See also Figure 6In order to avoid the single positioning block 16 from repeatedly blocking the position of the lifting plate 6, a driving block 26 is vertically slidably connected to the side of the upper end of the fixed block 18 close to the rotating rod 22, and a slope is provided on the side of the driving block 26 close to the positioning block 16. In this way, when the pallet is close to the shelf 3, the bottom of the pallet will contact the slope and press the driving block 26 downward, thereby achieving the effect of pushing the driving block 26 to move downward. A card slot 23 is provided in the middle of the side of the rotating rod 22 close to the driving block 26, and a card block 24 is carded in the inner cavity of the card slot 23. The card block 24 and the card slot 23 can be carded together to control the rotation of the rotating rod 22. The position is limited and fixed, so that the positioning block 16 maintains a horizontal position. The end of the clamping block 24 away from the clamping slot 23 is fixedly connected to the driven block 25. The clamping block 24 and the driven block 25 are horizontally slidably connected to the inner cavity of the fixed block 18. The side of the driven block 25 away from the clamping block 24 is elastically connected to the inner cavity side wall of the fixed block 18 through a spring. The upper side walls of the driven block 25 are provided with driven grooves 28. The lower sides of the inner cavity of the driving block 26 are fixedly connected with driven rods 29. The end of the driven rod 29 away from the driving block 26 is slidably matched with the driven groove 28. That is, after the tray presses down the driving block 26, the driving block 26 The driven rod 29 is driven to be pressed vertically downward synchronously, so that the driven block 25 and the card block 24 are driven to be horizontally away from the position of the card slot 23 through the cooperation of the driven rod 29 and the driven slot 28, so that the card block 24 is separated from the card slot 23, and the card block 24 loses its limiting effect on the positioning block 16. Under the elastic force of the spring, the positioning block 16 rotates 90° counterclockwise around the center of the circle of the rotating rod 22, so as to maintain the vertical state. At this time, when the lifting plate 6 moves up again, the positioning block 16 in the vertical state will not contact the positioning slot 17 again, thereby losing the positioning effect on the lifting plate 6, thereby avoiding multiple positioning of a single positioning block 16. The problem of contact with the positioning groove 17 is solved, so that the goods can be transferred to the shelf 3 from the bottom to the top in sequence. In the process of lifting the pallet, the positioning of the pallet can be quickly completed through the contact between the positioning block 16 and the positioning groove 17. There is no need to repeatedly adjust the position of the lifting plate 6 to align the position of the pallet with the position of the partition in the shelf, thereby greatly saving the time required for lifting the pallet. In addition, since the lifting plate 6 can be accurately positioned at one time, there is no need to repeatedly lift the lifting plate 6 to adjust the position, and the wear of the wire rope 12 and the driving gear 9 and the driven gear 10 is also reduced.

[0037] See also Fig.10After the inner cavity of the shelf 3 is filled with goods, the empty shelf 3 can be replaced to load goods again. After replacing the shelf 3, the positioning block 16 in the vertical state needs to be rotated to return to the initial position and the lifting plate 6 is positioned again. A slide groove 36 is provided in the middle of the upper end of the mounting block 19. The inner cavity of the slide groove 36 is horizontally slidably connected with an adjustment plate 30. The adjustment plate 30 is horizontally slidably connected with the inner cavity of the support rod 2. An electric push rod is commonly connected between the middle of the end of the adjustment plate 30 away from the mounting block 19 and the inner cavity side wall of the support rod 2. The electric push rod can drive the adjustment plate 30 to move horizontally. The end of the rotating rod 22 away from the slot 23 is fixedly connected There is a steering gear 39, and an adapting groove is opened inside the mounting block 19. The position of the adapting groove corresponds to the steering gear 39. A driven plate 37 is arranged on the side of the steering gear 39 close to the slide groove 36. The driven plate 37 is vertically slidably connected in the adapting groove. A rack 38 is fixedly connected to the side of the driven plate 37 close to the steering gear 39. The rack 38 and the steering gear 39 are meshed with each other. When the steering gear 39 rotates with the rotating rod 22, the driven plate 37 and the rack 38 will be driven to move up synchronously. Similarly, when the driven plate 37 and the rack 38 move down, the steering gear 39 will also be driven to reset, thereby driving the rotating rod 22 and the positioning block 16 to reset.

[0038] See also Figure 11-Figure 12A moving block 40 is horizontally slidably connected to the middle of the inner cavity of the slide groove 36, and the moving block 40 is elastically connected to the side wall of the inner cavity of the slide groove through a spring. A driving rod 13 is slidably connected to the side of the moving block 40 close to the driven plate 37, and the driving rod 13 is elastically connected to the inner cavity of the moving block 40 through a spring. A driving groove 14 is provided on the side of the driven plate 37 close to the moving block 40, and an L-shaped groove 15 is provided at one end of the driving groove 14. The end of the driving rod 13 away from the moving block 40 is slidably matched with the driving groove 14 and the L-shaped groove 15. The L-shaped groove 15 is composed of a horizontal groove and a vertical groove. The vertical groove is connected to the upper end of the driving groove 14, and the horizontal groove is connected to the lower end of the driving groove 14. The connection between the two ends of the driving groove 14 and the L-shaped groove 15 is fixedly connected with an inclined block 41. The end of the inclined block 41 located at the top close to the vertical groove is higher than the end close to the driving groove 14, and the end of the inclined block 41 located at the top close to the horizontal groove is lower than the end close to the driving groove 14. That is, when the adjustment plate 30 is pushed by the electric push rod to move toward the position of the positioning block 16, The moving block 40 will be pushed to drive the driving rod 13 to move horizontally synchronously. At this time, due to the obstruction of the inclined block 41 located below, the driving rod 13 will move along the driving groove 14 from the connection between the driving groove 14 and the horizontal groove, and approach the inclined block 41 located above. When contacting the inclined block 41 located above, the driving rod 13 will move relatively toward the inner cavity of the moving block 40, thereby passing over the inclined block 41 and entering the vertical groove. After the driving rod 13 enters the vertical groove, the driving rod 13 will pop out of the inner cavity of the moving block 40 The inclined block 41 at the top will block the driving rod 13 to prevent it from returning to the driving groove 14. When the adjusting plate 30 pushes the moving block 40 to move, the driven plate 37 and the rack 38 move downward, thereby driving the adjustment gear 39 to drive the rotating rod 22 to rotate, thereby making the positioning block 16 return to the initial position, and at this time the slot 23 and the block 24 return to the same horizontal plane, and the block 24 will enter the slot 23 again under the action of the elastic force, thereby limiting the positioning block 16 again.

[0039] When the positioning block 16 rotates toward the direction of the fixed block 18 again, the rotating rod 22 drives the adjustment gear 39 to rotate, so that the driven plate 37 and the rack 38 move up synchronously, and the driving rod 13 will also move relatively to the connection between the horizontal groove and the vertical groove. After the adjustment plate 30 is separated from the moving block 40, the moving block 40 drives the driving rod 13 back to the initial position under the action of elastic force. During the resetting process of the moving block 40, the driving rod 13 will move along the horizontal groove, approach the inclined block 41 located below, and cross the inclined block 41 to return to the inner cavity of the driving groove 14, so as to facilitate driving the driven plate 37 to move down again.

[0040] See also Figure 8-Figure 9A plurality of adjustment slots 31 are provided on the side wall of the adjustment plate 30, a first balancing slot 32 is provided at the lower end of the adjustment slot 31, and a second balancing slot 33 is provided at the upper end of the adjustment slot 31, the position and number of the adjustment slots 31 correspond to the mounting block 19, the horizontal lengths of the first balancing slot 32 and the second balancing slot 33 will change with the height, from low to high, the length of the first balancing slot 32 increases successively, while the length of the second balancing slot 33 decreases successively, and the length difference between two adjacent first balancing slots 32 and second balancing slots 33 is the same as the horizontal distance between the two ends of the adjustment slot 31, a connecting rod 34 is vertically slidably connected to the side of the slide slot 36 close to the fixed block 18, the center positions of the plurality of connecting rods 34 are all located in the same vertical plane, and the connecting rod 34 is away from the end of the fixed block 18 A movable rod 35 is fixedly connected, and the movable rod 35 slides with the adjustment slot 31, the first balancing slot 32, and the second balancing slot 33. When the adjustment plate 30 moves horizontally in the direction away from the fixed block 18, the movable rod 35 located at the bottom will first enter the inner cavity of the adjustment slot 31 from the first balancing slot 32, so that the movable rod 35 and the adjustment slot 31 cooperate to drive the connecting rod 34 to move upward synchronously. After one movable rod 35 enters the inner cavity of the second balancing slot 33, the movable rod 35 adjacent to and above the movable rod 35 will enter the inner cavity of the adjustment slot 31, so that multiple connecting rods 34 move upward in sequence from low to high. Through the cooperation of the first balancing slot 32 and the movable rod 35, the connecting rod 34 can remain stationary when the adjustment plate 30 moves in the direction of the fixed block 18.

[0041] See also Figure 8 and Figure 6A traction rope 27 is fixedly connected to the top of the inner cavity of the driving block 26, and the end of the traction rope 27 away from the driving block 26 passes through the driven block 25, the fixed block 18 and the mounting block 19 and is fixedly connected to the connecting rod 34. The driven block 25, the fixed block 18 and the mounting block 19 are all provided with grooves for matching the traction rope 27 inside the connecting rod 34. When the adjusting plate 30 is horizontally away from the fixed block 18, the connecting rod 34 will be driven to move up from low to high in sequence, thereby pulling the driving block 26 downward from low to high in sequence through the traction rope 27, thereby contacting the limit of the positioning block 16 in sequence from low to high, so that the positioning block 16 can automatically rotate before it contacts the tray, thereby controlling whether the positioning block 16 located below needs to contact the positioning groove 17, and driving the moving block 40 to move horizontally through the adjusting plate 30 The horizontal movement can reset the rotated positioning block 16. When the goods on the pallet are transferred to the inside of the shelf 3, if the light goods transported on the conveying frame 5 are before the heavy goods, the electric push rod can be used to drive the adjusting plate 30 to move horizontally away from the position of the fixed block 18, thereby driving the connecting rod 34 to move upward, and the driving block 26 is pulled downward by the traction rope 27, and the contact block 24 limits the rotation rod 22, so that the positioning block 16 can automatically rotate to avoid contact with the positioning groove 17, so that the light goods can be directly transported to the top of the shelf 3, so that the center of gravity of the shelf 3 is lower during the movement of the full goods, thereby avoiding the goods from tipping over due to the unstable center of gravity when the shelf 3 collides with external objects, thereby causing the life safety of the staff and the loss of goods and property.

Claims

1. A pallet lifting device, comprising a base, characterized in that: The upper end of the base is fixedly connected with symmetrical support rods, and the upper ends of the symmetrical support rods are commonly fixedly connected with a fixing plate, a lifting plate is fittedly arranged in the middle of the upper end of the base, a tray is placed above the lifting plate, and a lifting device for lifting the lifting plate is arranged in the middle of the upper end of the fixed plate, and the lifting device includes symmetrical steel wire ropes, and the lower ends of the symmetrical steel wire ropes are fixedly connected to the lifting plate, and one side of the base is fixedly connected with a conveying frame, and a plurality of positioning mechanisms for limiting the lifting plate are arranged on the side of the symmetrical support rods away from the conveying frame close to the lifting plate, and when the lifting device winds the steel wire rope, the steel wire rope drives the lifting plate to move vertically upward and continuously approaches the lower end surface of the positioning mechanism.

2. A pallet lifting device according to claim 1, characterized in that: A symmetrical mounting plate is fixedly connected to the middle part of the upper end of the fixed plate, and a winding rod is symmetrically connected between the mounting plates for common rotation. The ends of the symmetrical steel wire ropes away from the lifting plate are both wound around the outer wall of the winding rod, and a driven gear is fixedly connected to the middle part of the outer wall of the winding rod. A servo motor is transmission-connected to the side of the upper end of the fixed plate close to the conveying frame, and a driving gear is fixedly connected to the output end of the servo motor, and the driving gear and the driven gear are meshed with each other. A transmission roller is transmission-connected to the middle part of the upper end of the lifting plate and the conveying frame, and a shelf is closely attached to the side of the base away from the conveying frame, and a plurality of cross bars are fixedly connected to the outer wall of the shelf by threads, and a plurality of positioning holes are provided at the upper end of the cross bars, and a plurality of connecting keys are provided between the symmetrical cross bars located on the same horizontal plane.

3. A pallet lifting device according to claim 2, characterized in that: The positioning mechanism includes a mounting block, and a groove for cooperating with the mounting block is formed on the side wall of the symmetrical support rod close to the shelf, the mounting block is fixedly connected in the groove, a fixing block is fixedly connected to the side of the mounting block close to the transmission roller, a positioning block is closely arranged on the side of the fixing block close to the lifting plate, a rotating rod is rotatably connected to the side of the fixing block close to the positioning block, an outer wall of the rotating rod is fixedly connected to the side of the positioning block close to the fixed block, an end of the rotating rod away from the fixed block is rotatably connected to the mounting block, and the height of the fixing block is the same as the height of the positioning block.

4. A pallet lifting device according to claim 3, characterized in that: An arc-shaped groove is provided on the side wall of the mounting block, a slider is slidably connected to the middle of the inner cavity of the arc-shaped groove, one end of the slider away from the arc-shaped groove is fixedly connected to the middle of one side of the positioning block close to the mounting block, and the lower end of the slider is elastically connected to the bottom of the inner cavity of the arc-shaped groove by a spring.

5. A pallet lifting device according to claim 3, characterized in that: The upper end of the fixed block is vertically slidably connected with a driving block on one side close to the rotating rod, and a slope is provided on the side of the driving block close to the positioning block, and a slot is provided in the middle of the side of the rotating rod close to the driving block, and a locking block is engaged with the inner cavity of the slot, and a driven block is fixedly connected to the end of the locking block away from the slot, and the locking block and the driven block are horizontally slidably connected to the inner cavity of the fixed block, and driven grooves are provided on both side walls of the upper part of the driven block, and driven rods are fixedly connected on both sides of the lower part of the inner cavity of the driving block, and the end of the driven rod away from the driving block is slidably engaged with the driven groove.

6. A pallet lifting device according to claim 5, characterized in that: A slide groove is provided in the middle part of the upper end of the mounting block, and an adjustment plate is horizontally slidably connected to the inner cavity of the slide groove, and the adjustment plate is horizontally slidably connected to the inner cavity of the support rod, and an electric push rod is commonly connected to the middle part of the end of the adjustment plate away from the mounting block and the inner cavity side wall of the support rod for transmission, and an adjustment gear is fixedly connected to the end of the rotating rod away from the slot, and an adaptation groove is provided inside the mounting block, and the position of the adaptation groove corresponds to the adjustment gear, and a driven plate is provided on the side of the adjustment gear close to the slide groove, and the driven plate is vertically slidably connected to the adaptation groove, and a rack is fixedly connected to the side of the driven plate close to the adjustment gear, and the rack and the adjustment gear are meshed with each other.

7. A pallet lifting device according to claim 6, characterized in that: A moving block is horizontally slidably connected to the middle part of the inner cavity of the slide groove, and a driving rod is slidably connected to the side of the moving block close to the driven plate. A driving groove is provided on the side of the driven plate close to the moving block, and an L-shaped groove is provided at one end of the driving groove. The end of the driving rod away from the moving block is slidably matched with the driving groove and the L-shaped groove, and the L-shaped groove is composed of a horizontal groove and a vertical groove, and the connection between the driving groove and the horizontal groove and the vertical groove is fixedly connected with an inclined block.

8. A pallet lifting device according to claim 6, characterized in that: The side wall of the adjustment plate is provided with a plurality of adjustment grooves, the positions and numbers of the adjustment grooves correspond to the mounting blocks, the lower end of the adjustment groove is provided with a first balancing groove, the upper end of the adjustment groove is provided with a second balancing groove, the horizontal lengths of the plurality of the first balancing grooves increase as the distance between the plurality of the first balancing grooves and the base increases, while the horizontal lengths of the plurality of the second balancing grooves decrease as the distance between the plurality of the second balancing grooves and the base increases.

9. A pallet lifting device according to claim 8, characterized in that: A connecting rod is vertically slidably connected to one side of the slide groove close to the fixed block, and the center positions of multiple connecting rods are all located in the same vertical plane. A movable rod is fixedly connected to one end of the connecting rod away from the fixed block, and the movable rod is slidably matched with the adjustment groove, the first balance groove, and the second balance groove.

10. A pallet lifting device according to claim 9, characterized in that: A traction rope is fixedly connected to the top of the inner cavity of the driving block, and the end of the traction rope away from the driving block passes through the driven block, the fixed block and the mounting block and is fixedly connected to the connecting rod. The driven block, the fixed block, the mounting block and the connecting rod are all provided with grooves for cooperating with the traction rope.

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