An adjustable outer fork structure

Abstract

This utility model discloses an adjustable outer fork structure, including a fork carriage (100) and an inner carriage (200). A left fork (300) and a right fork (400) are mounted on the fork carriage (100) and slide thereon. A transmission assembly (500) and a drive assembly (600) are installed inside the fork carriage (100). The transmission assembly (500) includes a left sprocket (510) and a right sprocket (520). A transmission chain (530) is wound around the left sprocket (510) and the right sprocket (520). The transmission chain (530) is provided with a left moving part (531) and a right moving part (532) that are staggered vertically and are fixedly installed with the left fork (300) and the right fork (400) respectively. Through the above method, this utility model can improve work efficiency and adjust the movement of the left and right forks to ensure the synchronicity of the movement of the left and right forks.

Description

Technical Field

[0001] This utility model relates to the field of forklifts, and in particular to an adjustable outer fork structure. Background Technology

[0002] Forklifts are versatile, flexible, and efficient material handling equipment. Typically, a standard forklift is equipped with a pair of forks, which are used to hold and support goods placed on pallets. The forklift then uses its lifting, tilting, and other actions to stack and unload the goods. During this process, because the pallets supporting the goods have various structures, the position of the forks on the forklift's fork carriage needs frequent adjustment.

[0003] When forklifts are used to move goods, they need to be used with pallets. However, there are currently no unified standards for pallet manufacturing. Therefore, when the distance between the fork holes on the pallet changes, the fork spacing needs to be adjusted accordingly. This means that forklifts need to frequently adjust the fork spacing when handling different pallets. To improve work efficiency, some forklifts use hydraulic fork spacing adjustment mechanisms. Existing hydraulic fork spacing adjustment mechanisms are generally designed with two cylinders, each controlling one fork. This requires two sets of hydraulic circuits to drive the cylinders and two sets of control valves. Because the forks are controlled by two separate cylinders, there can be a problem of asynchronous fork spacing adjustment, which may affect the use of the forklift. Utility Model Content

[0004] The main technical problem solved by this utility model is to provide an adjustable outer fork structure that can improve work efficiency and simultaneously adjust the movement of the left and right forks to ensure the synchronicity of their movement.

[0005] To solve the above-mentioned technical problems, the present invention provides a fork structure with adjustable outer distance, including a fork carriage and an inner slide fixedly installed thereon. A left fork and a right fork are mounted on the fork carriage and slide thereon. A transmission assembly and a drive assembly are installed inside the fork carriage. The transmission assembly includes a left sprocket and a right sprocket that are respectively mounted vertically offset on the left fork and the right fork. A transmission chain is wound around the left sprocket and the right sprocket. A left moving part and a right moving part are provided on the transmission chain that are vertically offset. The left moving part and the right moving part are fixedly installed on the left fork and the right fork, respectively. The movable end of the drive assembly is fixedly connected to the left moving part or the right moving part.

[0006] The transmission chain includes a first chain and a second chain. The two ends of the first chain are A and B, respectively, and the two ends of the second chain are C and D, respectively. The A end of the first chain is fixedly installed with the left moving part, and the B end passes around the right sprocket and is fixedly installed with the right moving part. The C end of the second chain is fixedly installed with the right moving part, and the D end passes around the left sprocket and is fixedly installed with the left moving part.

[0007] The fork carriage includes an upper crossbeam, a lower crossbeam, and a left mounting plate and a right mounting plate for connecting and fixing the upper crossbeam and the lower crossbeam.

[0008] The left sprocket and the right sprocket are fixedly mounted on the left mounting plate and the right mounting plate, respectively.

[0009] Multiple reinforcing ribs are also installed between the upper crossbeam and the lower crossbeam.

[0010] The upper and lower ends of the upper and lower crossbeams are respectively provided with slots. The left and right forks are respectively equipped with upper and lower clamping plates. The upper and lower clamping plates are respectively matched and installed with the slots, so that the left and right forks can slide in relative or opposite directions along the upper and lower crossbeams.

[0011] An inner limiting block is provided in the middle of the upper crossbeam and / or the lower crossbeam.

[0012] An outward limiting block is installed on the inner end face of the left fork and the right fork respectively, and the outward limiting block is used to abut against the left mounting plate and the right mounting plate.

[0013] The left moving part and the right moving part have the same structure, and the left moving part and the right moving part are fixedly connected to the A end and B end of the first chain and the C end and D end of the second chain through an adjustment unit.

[0014] The adjustment unit includes an adjustment seat and an adjustment bolt. The adjustment bolt is threadedly connected to the adjustment seat. Adjustment nuts are installed at both ends of the adjustment bolt. The end of the adjustment bolt is fixedly connected to one of the A end or B end of the first chain or the C end or D end of the second chain.

[0015] The beneficial effects of this utility model are: the adjustable outer distance fork structure of this utility model can improve work efficiency, and at the same time adjust the movement of the left and right forks to ensure the synchronicity of the movement of the left and right forks. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of an adjustable outer fork structure according to this utility model. Figure 1 ;

[0017] Figure 2 This is a schematic diagram of the structure of an adjustable outer fork structure according to this utility model. Figure 2 ;

[0018] Figure 3 yes Figure 1 Exploded view;

[0019] Figure 4 yes Figure 1 The front view;

[0020] Figure 5 yes Figure 1 Rear view;

[0021] Figure 6 yes Figure 1 The left view;

[0022] Figure 7 yes Figure 1 The right view. Detailed Implementation

[0023] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0024] Please see Figures 1-7 The embodiments of this utility model include:

[0025] This utility model discloses an adjustable outer fork structure, characterized in that it includes a fork carriage 100 and an inner slide 200 fixedly installed thereon. A left fork 300 and a right fork 400 are mounted on the fork carriage 100 and slide thereon. A transmission assembly 500 and a drive assembly 600 are installed inside the fork carriage 100. The transmission assembly 500 includes a left sprocket 510 and a right sprocket 520 respectively mounted vertically offset on the left fork 300 and the right fork 400. A transmission chain 530 is wound around the left sprocket 510 and the right sprocket 520. The transmission chain 530 is provided with a vertically offset left moving part 531 and a right moving part 532, which are fixedly installed to the left fork 300 and the right fork 400 respectively. The movable end of the drive assembly 600 is fixedly connected to the left moving part 531 or the right moving part 532. Specifically, the fork carriage and the inner carriage are welded together. In practical applications, the inner carriage and the fork carriage can also be assembled as separate components using pins, hinges, or other methods. In this application, since the left sprocket and the right sprocket, as well as the left and right moving parts, are all vertically offset, when the moving end of the drive assembly is running, it drives the left or right moving part to move, causing the transmission chain to drive the left and right forks to move synchronously in opposite directions or relative to each other. This improves work efficiency and simultaneously adjusts the movement of the left and right forks, ensuring their synchronicity. More specifically, when the left sprocket is above, the left moving part is correspondingly positioned above; similarly, when the right sprocket is below, the right moving part is correspondingly positioned below, ensuring that the left and right moving parts move relative to each other or in opposite directions when the transmission chain rotates.

[0026] The transmission chain 530 includes a first chain 533 and a second chain 534. The first chain 533 has ends A and B, and the second chain 534 has ends C and D. End A of the first chain 533 is fixedly installed with the left moving part 531, and end B passes around the right sprocket 520 before being fixedly installed with the right moving part 532. End C of the second chain 534 is fixedly installed with the right moving part 532, and end D passes around the left sprocket 510 before being fixedly installed with the left moving part 531. Specifically, the first chain and the second chain form a loop connected end-to-end. More specifically, the first chain and the second chain are roller chains, and the right sprocket and the left sprocket are sprockets.

[0027] Specifically, the drive assembly uses a hydraulic cylinder, which is a double-acting cylinder arranged horizontally. The cylinder barrel is fixed to the fork carriage, and the lug at the front end of the piston rod is fixed to the right moving part of the right fork by a pin. The horizontal axis of the hydraulic cylinder is aligned with the axis of the chain at end A of the first chain that passes over the right sprocket. When the piston rod retracts, the right fork retracts inward, and at the same time, the hydraulic cylinder pulls end A of the first chain. End B of the first chain moves because it passes over the right sprocket, and the distance that end B of the first chain moves is always equal to the distance that end A of the first chain moves. That is, the left and right forks always retract inward synchronously at the same speed. During this process, there will be no significant asynchronous movement between the left and right forks due to different moving speeds.

[0028] The fork carriage 100 includes an upper crossbeam 110, a lower crossbeam 120, and a left mounting plate 130 and a right mounting plate 140 for connecting and fixing the upper crossbeam 110 and the lower crossbeam 120. Specifically, the upper crossbeam 110, the lower crossbeam 120, the left mounting plate 130, and the right mounting plate 140 are welded together to form the fork carriage, and the entire fork carriage has a frame plate structure.

[0029] The left sprocket 510 and the right sprocket 520 are respectively fixedly mounted on the left mounting plate 130 and the right mounting plate 140.

[0030] Multiple reinforcing ribs 150 are also installed between the upper crossbeam 110 and the lower crossbeam 120.

[0031] The upper and lower ends of the upper crossbeam 110 and the lower crossbeam 120 are respectively provided with slots 160. The left fork 300 and the right fork 400 are respectively equipped with an upper clamping plate 310 and a lower clamping plate 320. The upper clamping plate 310 and the lower clamping plate 320 are respectively matched and installed with the slots 160, so that the left fork 300 and the right fork 400 can slide in relative or opposite directions along the upper crossbeam 110 and the lower crossbeam 120.

[0032] An inner limiting block 700 is provided in the middle of the upper crossbeam 110 and / or the lower crossbeam 120.

[0033] An outward limiting block 800 is respectively installed on the inner end face of the left fork 300 and the right fork 400. The outward limiting block 800 is used to abut against the left mounting plate 130 and the right mounting plate 140.

[0034] The left moving part 531 and the right moving part 532 have the same structure. The left moving part 531 and the right moving part 532 are fixedly connected to the A end and B end of the first chain 533 and the C end and D end of the second chain 534 through the adjustment unit 900.

[0035] The adjustment unit 900 includes an adjustment seat 910 and an adjustment bolt 920. The adjustment bolt 920 is threadedly connected to the adjustment seat 910. Adjustment nuts 930 are installed at both ends of the adjustment bolt 920. The end of the adjustment bolt 920 is fixedly connected to one of the A end or B end of the first chain 533 or the C end or D end of the second chain 534.

[0036] Specifically, the optimal force application state is achieved when the axis of the hydraulic cylinder is aligned with the axis of the adjusting screws of the first and second chains in the Y direction.

[0037] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An adjustable outer fork structure, characterized in that, The system includes a fork carriage (100) and an inner carriage (200) fixedly mounted thereon. A left fork (300) and a right fork (400) are mounted on the fork carriage (100) and slide thereon. A transmission assembly (500) and a drive assembly (600) are installed inside the fork carriage (100). The transmission assembly (500) includes a left sprocket (510) and a right sprocket (520) respectively mounted vertically offset on the left fork (300) and the right fork (400). A drive chain (530) is wound around the sprocket (510) and the right sprocket (520). The drive chain (530) is provided with a left moving part (531) and a right moving part (532) that are staggered vertically. The left moving part (531) and the right moving part (532) are fixedly installed with the left fork (300) and the right fork (400) respectively. The movable end of the drive assembly (600) is fixedly connected to the left moving part (531) or the right moving part (532).

2. The adjustable outer fork structure according to claim 1, characterized in that, The transmission chain (530) includes a first chain (533) and a second chain (534). The two ends of the first chain (533) are A and B, respectively, and the two ends of the second chain (534) are C and D, respectively. The A end of the first chain (533) is fixedly installed with the left moving part (531), and the B end passes around the right sprocket (520) and is then fixedly installed with the right moving part (532). The C end of the second chain (534) is fixedly installed with the right moving part (532), and the D end passes around the left sprocket (510) and is then fixedly installed with the left moving part (531).

3. The adjustable outer fork structure according to claim 1, characterized in that, The fork carriage (100) includes an upper crossbeam (110), a lower crossbeam (120), and a left mounting plate (130) and a right mounting plate (140) for connecting and fixing the upper crossbeam (110) and the lower crossbeam (120).

4. The adjustable outer fork structure according to claim 3, characterized in that, The left sprocket (510) and the right sprocket (520) are fixedly mounted on the left mounting plate (130) and the right mounting plate (140), respectively.

5. The adjustable outer fork structure according to claim 3, characterized in that, Multiple reinforcing ribs (150) are also installed between the upper crossbeam (110) and the lower crossbeam (120).

6. The adjustable outer fork structure according to claim 3, characterized in that, The upper and lower ends of the upper crossbeam (110) and the lower crossbeam (120) are respectively provided with slots (160). The left fork (300) and the right fork (400) are respectively equipped with an upper plate (310) and a lower plate (320). The upper plate (310) and the lower plate (320) are respectively matched and installed with the slots (160), so that the left fork (300) and the right fork (400) can slide in relative or opposite directions along the upper crossbeam (110) and the lower crossbeam (120).

7. The adjustable outer fork structure according to claim 3, characterized in that, An inner limiting block (700) is provided in the middle of the upper crossbeam (110) and / or the lower crossbeam (120).

8. The adjustable outer fork structure according to claim 3, characterized in that, An outward limiting block (800) is installed on the inner end face of the left fork (300) and the right fork (400), respectively. The outward limiting block (800) is used to abut against the left mounting plate (130) and the right mounting plate (140).

9. The adjustable outer fork structure according to claim 2, characterized in that, The left moving part (531) and the right moving part (532) have the same structure. The left moving part (531) and the right moving part (532) are fixedly connected to the A end and B end of the first chain (533) and the C end and D end of the second chain (534) through the adjustment unit (900).

10. The adjustable outer fork structure according to claim 9, characterized in that, The adjustment unit (900) includes an adjustment seat (910) and an adjustment bolt (920). The adjustment bolt (920) is threadedly connected to the adjustment seat (910). Adjustment nuts (930) are installed at both ends of the adjustment bolt (920). The end of the adjustment bolt (920) is fixedly connected to one of the A end or B end of the first chain (533) or the C end or D end of the second chain (534).

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