Balanced tray lifting fork

Abstract

The utility model discloses a balance tray lifting fork which comprises a stand column, fork feet are connected to the lower end of the stand column, a lifting arm is arranged inside the upper end of the stand column in a sleeved mode, a chain installation plate and a lifting handle are arranged on the left side and the right side of the outer side of the upper end of the stand column, and a binding chain is arranged on the chain installation plate in a penetrating mode. Chain bags for containing the binding chains are arranged on the periphery of the lower side of the handle, and the outer sides of the chain bags are wrapped with rubber buffering pads. The lifting arm comprises a longitudinal lifting arm and a transverse lifting arm in the transverse direction, a sliding groove is formed in the middle of the transverse lifting arm, a balance shackle assembly is installed in the sliding groove, a nylon wear-resistant layer is arranged in the upper top face, making contact with the balance shackle assembly, of the inner wall of the transverse lifting arm, and a roller track is arranged on the nylon wear-resistant layer. The device has the advantages of being simple in structure, safe, reliable and convenient to use.

Description

Technical Field

[0001] This utility model relates to a lifting device, and more particularly to a balance pallet lifting fork. Background Technology

[0002] Pallet lifting forks are mainly used for moving heavy objects placed on pallets. They can be used in combination with electric hoists, jib cranes, overhead cranes, and truck cranes. This combination provides the functionality of a forklift, allows for a higher stacking height than a forklift, and eliminates the need to reserve space for forklift passage, making it very popular with users.

[0003] A Chinese patent discloses a counterbalanced pallet fork (authorization announcement number: CN 207121347U). It features a male locking latch at one end of the crossarm and a hinged counterbalance block at the other. The counterbalance block has a female locking latch that matches the male latch. When the counterbalanced fork is unloaded, the fork carriage rotates around the hinge axis under its own weight, causing the male and female locking latches to engage and lock the counterbalance block to the fork carriage, ultimately leveling the forks. When the counterbalanced fork is loaded, the fork carriage can automatically level itself by rotating around the hinge axis. However, this type of fork has a limited application, offering only two balance adjustment positions—fully loaded and unloaded—making it impossible to adjust to the optimal balance point based on the size and weight of the goods. Furthermore, according to user feedback, for safety, a binding chain is typically used when using the fork, usually over 3 meters long, but there is no suitable place to store such chains, which is very inconvenient. Utility Model Content

[0004] The purpose of this invention is to provide a balance pallet lifting fork. This invention has the advantages of simple structure, safety and reliability, and ease of use.

[0005] The technical solution of this utility model is as follows: a balance pallet lifting fork, including a column, with fork feet connected to the lower end of the column, a lifting arm sleeved inside the upper end of the column, chain mounting plates and handles on opposite sides of the upper end of the column, a binding chain passing through the chain mounting plate, and chain bags for placing the binding chain on all four sides of the lower side of the handle, with rubber cushioning pads wrapped around the outside of the chain bags.

[0006] In the aforementioned counterbalance pallet lifting fork, the lifting arm includes a longitudinal lifting arm and a transverse lifting arm. The transverse lifting arm has a sliding groove in the middle, and a counterbalance shackle assembly is installed in the sliding groove. The upper surface of the inner wall of the transverse lifting arm that contacts the counterbalance shackle assembly is provided with a nylon wear-resistant layer, and a roller track is provided on the nylon wear-resistant layer.

[0007] In the aforementioned counterbalance pallet lifting fork, the counterbalance shackle assembly includes a sliding plate, a lifting plate fixedly mounted on the upper side of the sliding plate, a roller shaft on the lifting plate, a roller mounted on the roller shaft, a gas spring on the lower side of the sliding plate, one end of the gas spring connected to one end of the sliding plate, and the other end of the gas spring fixedly connected to the boom; the lifting plate also has a support shaft, the highest surface of the support shaft and the highest surface of the roller both contact the roller track of the nylon wear-resistant layer.

[0008] In the aforementioned type of balance pallet lifting fork, the lifting plate is provided with lifting holes, and a lifting ring is movably sleeved in the lifting holes. The lifting holes are two connected rings, forming two fixed positions, namely the full load position and the empty load position. Even if the gas spring fails, the balance point can be roughly adjusted, making it safer.

[0009] In the aforementioned type of balance pallet lifting fork, the side of the transverse lifting arm is provided with a limiting hole, and a safety bolt that can limit the position is inserted into the limiting hole to improve the safety factor.

[0010] In the aforementioned type of balance pallet lifting fork, the longitudinal lifting arm and the column have several matching adjustment holes for adjusting the height of the positioning lifting arm.

[0011] In the aforementioned type of balance pallet lifting fork, a crossbar is vertically provided on both sides of the lower end of the column, and fork feet are provided at both ends of the crossbar. Several fork foot positioning holes are provided on the crossbar for adjusting the distance of the positioning fork feet.

[0012] This utility model, by setting up a balance shackle assembly, uses a gas spring to control the lifting fork to adjust to the optimal balance point according to the size and weight of the goods. It can also be further adjusted through the two fixed positions of the lifting hole on the lifting ring, making it more widely applicable.

[0013] Furthermore, the highest surface of the support shaft and the highest surface of the roller both contact the roller track of the nylon wear-resistant layer, making the roller more durable;

[0014] Furthermore, the column is equipped with a chain bag, which can hold tools such as binding chains. At the same time, the outside of the chain bag is equipped with a rubber cushioning pad, which can prevent the column from being impacted when subjected to external forces, thus protecting the column.

[0015] In summary, this utility model is characterized by safety and reliability, ease of use, and the ability to automatically adjust to the optimal balance point. Attached Figure Description

[0016] Figure 1 This is an exploded view of the present invention;

[0017] Figure 2 This is a schematic diagram of the sliding plate and hanging plate structure of this utility model;

[0018] The labels in the attached diagram are as follows: 1. Boom; 11. Longitudinal boom; 12. Lateral boom; 13. Sliding groove; 14. Safety bolt; 15. Cotter pin; 16. Positioning bolt; 2. Column; 21. Chain mounting plate; 22. Handle; 23. Crossbar; 3. Fork foot; 40. Binding chain; 4. Chain bag; 41. Rubber cushion; 5. Nylon wear-resistant layer; 6. Balance shackle assembly; 61. Sliding plate; 62. Lifting plate; 621. Roller shaft; 622. Support shaft; 623. Lifting hole; 63. Roller; 64. Gas spring; 7. Lifting ring. Detailed Implementation

[0019] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0020] Example

[0021] A type of balance pallet fork, such as Figure 1-2 As shown, the column includes a column 2, with a fork 3 connected to the lower end of the column 2. A boom 1 is fitted inside the upper end of the column 2. Chain mounting plates 21 and handles 22 are provided on opposite sides of the upper end of the column 2. Binding chains 40 are threaded through the chain mounting plates 21. Chain bags 4 for placing the binding chains 40 are provided around the lower side of the handles 22. The outer side of the chain bags 4 is covered with rubber cushioning pads 41. The chain bags 4 on the front and rear sides of the column 2 are higher than the chain bags 4 on the left and right sides.

[0022] The boom 1 includes a longitudinal boom 11 and a transverse boom 12. The transverse boom 12 has a sliding groove 13 in the middle. A balance shackle assembly 6 is installed in the sliding groove 13. A nylon wear-resistant layer 5 is provided on the upper surface of the inner wall of the transverse boom 12 that contacts the balance shackle assembly 6. A roller track 51 is provided on the nylon wear-resistant layer 5.

[0023] The side of the horizontal boom 12 is provided with a limiting hole, and a safety bolt 14 that can limit the position is inserted into the limiting hole. The safety bolt 14 is provided with a pin hole, and a cotter pin 15 can be inserted into the pin hole to improve the safety factor and ensure that no major accident will occur when the balance shackle assembly 6 fails.

[0024] The column 2 has a horizontal bar 23 on both sides of its lower end. The horizontal bar 23 has several fork positioning holes. The fork 3 passes through both ends of the horizontal bar 23. The distance between the two fork 3 can be adjusted by moving the fork 3 and locking it with bolts to suit different pallets.

[0025] The lower end of the longitudinal boom 11 and the column 2 have several matching adjustment holes. The adjustment holes are equipped with positioning bolts 16 for adjusting and fixing the height of the boom 1.

[0026] The balance shackle assembly 6 includes a sliding plate 61, with a hanging plate 62 fixedly mounted on the upper side of the sliding plate 61. Three roller shafts 621 are arranged side-by-side on the hanging plate 62, and rollers 63 are mounted on each of the three roller shafts 621. A gas spring 64 is located on the lower side of the sliding plate 61, with one end of the gas spring 64 connected to one end of the sliding plate 61 and the other end fixedly connected to the boom 1. Two support shafts 622 are also provided on the hanging plate 62. The highest surfaces of the two support shafts 622 and the highest surfaces of the three rollers 63 contact the roller tracks 51 of the nylon wear-resistant layer 5. The support shafts 622 provide support, and the sliding of the rollers 63 drives the gas spring 64 to extend and retract. The gas spring 64 buffers the movement of the hanging plate at a uniform speed, and can control the hanging plate 62 at any position in the middle.

[0027] The lifting plate 62 is provided with a lifting hole 623, and a lifting ring 7 is movably sleeved in the lifting hole 623. The lifting hole 623 consists of two connected rings, forming two fixed positions.

[0028] The balance shackle assembly 6 ensures that the lifting fork remains balanced and stable under both no-load and full-load conditions, with a high safety factor; at the same time, the width of the fork legs 3 and the height of the upright 2 can be adjusted to facilitate the handling of heavy objects placed on pallets.

[0029] In use, the lifting ring 7 on the horizontal boom 12 is fixed to the lifting equipment, and then the goods are placed on the fork legs 3 and secured with the binding chain 40. The lifting equipment is started, and the lifting plate 6 moves continuously in the sliding groove 13 to find the optimal balance point. The lifting plate 62 is then secured by the gas spring 64. The optimal balance point can also be further adjusted using the two fixing positions of the lifting holes 623 on the lifting ring 7. When not in use, the binding chain 40 can be conveniently placed inside the chain bag 4.

Claims

1. A balance pallet lifting fork, characterized in that: The system includes a column (2), with a fork (3) connected to the lower end of the column (2). A boom (1) is fitted inside the upper end of the column (2). A chain mounting plate (21) and a handle (22) are provided on the left and right sides of the upper end of the column (2). A binding chain (40) is threaded through the chain mounting plate (21). A chain bag (4) is provided on the lower side of the handle (22). A rubber cushioning pad (41) is wrapped around the outside of the chain bag (4). The boom (1) includes a longitudinal boom (11) and a transverse boom (12). A sliding groove (13) is provided in the middle of the transverse boom (12). A balance shackle assembly (6) is installed in the sliding groove (13). A nylon wear-resistant layer (5) is provided on the upper surface of the transverse boom (12) that contacts the balance shackle assembly (6). A roller track is provided on the nylon wear-resistant layer (5).

2. The counterbalance pallet lifting fork according to claim 1, characterized in that: The balance shackle assembly (6) includes a sliding plate (61), a hanging plate (62) fixedly mounted on the upper side of the sliding plate (61), a roller shaft (621) on the hanging plate (62), a roller (63) mounted on the roller shaft (621), a gas spring (64) on the lower side of the sliding plate (61), one end of the gas spring (64) being connected to one end of the sliding plate (61), and the other end of the gas spring (64) being fixedly connected to the horizontal boom (12); a support shaft (622) is also provided on the hanging plate (62), and the highest surface of the support shaft (622) and the highest surface of the roller (63) are both in contact with the roller track (51).

3. The balance pallet lifting fork according to claim 2, characterized in that: The lifting plate (62) is provided with a lifting hole (623), and a lifting ring (7) is movably sleeved in the lifting hole (623). The lifting hole (623) consists of two connected rings.

4. The balance pallet lifting fork according to claim 1, characterized in that: The side of the horizontal boom (12) is provided with a limiting hole, and a safety bolt that can limit the position is inserted into the limiting hole.

5. A balance pallet lifting fork according to claim 1, characterized in that: The column (2) has a horizontal bar (23) vertically arranged on both sides of its lower end. The horizontal bar (23) has several fork positioning holes, and the fork (3) passes through both ends of the horizontal bar (23).

6. The counterbalance pallet lifting fork according to claim 1, characterized in that: The lower end of the longitudinal boom (11) and the column (2) have several matching adjustment holes.

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