Pallet fork frame structure of pallet piling car

Abstract

The utility model discloses a pallet fork frame structure of a pallet piling car, which comprises a pallet fork and a pallet fork frame, a connector is arranged between the pallet fork and the pallet fork frame, the connector comprises a wing plate and a web plate, and an arc transition surface structure is arranged between a horizontal section and a vertical section of the web plate. The pallet fork is simple in structure, and the problem of fatigue damage of a welding seam at the welding position of the pallet fork and the pallet fork frame is solved by arranging the connector between the pallet fork and the pallet fork frame; the arc transition surface structure is arranged on the web plate of the connector, so that the structural stress concentration on the connector is reduced, and the structural stress level of the connector is reduced; the reinforcing plate is arranged on the pallet fork, so that the structural strength and rigidity of the pallet fork body are improved. Therefore, the strength of the fork arm carrier structure is improved, and the service life of the fork arm carrier structure is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of forklift structures, and particularly to a fork frame structure of a pallet stacker. Background Art

[0002] A pallet stacker is a small industrial vehicle with a compact structure and light operation, and is widely used in the warehousing and logistics industry. The pallet stacker forks, loads, unloads, transports and stacks goods through forks. Therefore, the forks and the fork frame fixedly connected thereto are both important load-bearing structural members, and are required to have sufficient strength and fatigue resistance in structural design.

[0003] In the prior art, the forks and the fork frame of a certain type of pallet stacker are integrally welded parts. As Figure 1 shown, due to the cantilever arrangement of the forks, a large bending moment will be generated at the welded root of the forks and the fork frame when the forks carry goods, and structural stress concentration is likely to occur here, resulting in a relatively high stress level here. This causes fatigue cracks to often occur at the welded seams of the forks and the fork frame, such as Figure 1 at the right fork crack source 131 and the left fork crack source 132 in the figure, and even the phenomenon that the forks break from the welded root, seriously reducing the service life of the product. Therefore, a fork frame structure of a pallet stacker is proposed. Content of the Utility Model

[0004] The purpose of the utility model is to provide a fork frame structure of a pallet stacker to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A fork frame structure of a pallet stacker includes forks and a fork frame. A connector is provided between the forks and the fork frame. The connector includes a wing plate and a web plate, and an arc transition surface structure is provided between the horizontal section and the vertical section of the web plate.

[0006] As a further scheme of the utility model: The number of the wing plates is two, and they are symmetrically installed on both sides of the web plate.

[0007] As a further scheme of the utility model: The distance between the two wing plates is adapted to the width of the forks.

[0008] As a further scheme of the utility model: The forks include a fork body and reinforcing plates. The number of the reinforcing plates is two, and they are symmetrically installed inside the cavity of the fork body.

[0009] As a further scheme of the utility model: The fork frame includes a cross beam plate, a column plate, a vertical beam plate and a cargo retaining plate which are fixedly connected to each other, and the thickness of the cross beam plate ≥ 30 mm.

[0010] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0011] 1. By arranging a connector between the fork and the fork rack, the problem of weld fatigue failure at the welding joint between the fork and the fork rack is avoided; by providing an arc transition surface structure on the web of the connector, the structural stress concentration on the connector is reduced, and the structural stress level of the connector is lowered; by providing a reinforcing plate on the fork, the structural strength and stiffness of the fork body are increased; thereby improving the strength of the fork rack structure and extending the service life of the fork rack structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a schematic diagram of the fork and fork rack structures of the prior art;

[0013] Figure 2 is a combined schematic diagram of the fork and fork rack of the present utility model;

[0014] Figure 3 is a schematic diagram of the fork of the present utility model;

[0015] Figure 4 is a schematic diagram of the connector of the present utility model;

[0016] Figure 5 is a schematic diagram of the fork rack of the present utility model;

[0017] In the figure: 1. Fork; 11. Fork body; 12. Reinforcing plate; 2. Connector; 21. Wing plate; 22. Web; 221. Arc transition surface structure; 3. Fork rack; 31. Cross beam plate; 32. Column plate; 33. Vertical beam plate; 34. Cargo retaining plate; 131. Right fork crack source; 132. Left fork crack source. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0019] Please refer to Figures 1-5, in the embodiment of the present utility model, a fork frame structure of a pallet stacker includes a fork 1 and a fork frame 3. A connector 2 is provided between the fork 1 and the fork frame 3. The connector 2 includes a wing plate 21 and a web plate 22. Further, the thickness of the wing plate 21 is not less than 20 mm, and the number of wing plates 21 is two, which are symmetrically installed on both sides of the web plate 22. The distance between the two wing plates 21 is adapted to the width of the fork 1. An arc transition surface structure 221 is provided between the horizontal section and the vertical section of the web plate 22.

[0020] Specifically, the connector 2 is fixedly connected to the fork 1 and the fork frame 3 respectively, so that the three can be stably connected together. Secondly, the connector 2 is made of a cast steel part, and the radius of the arc transition surface structure 221 is not less than 20 mm, thereby reducing the structural stress concentration on the connector 2 and reducing the structural stress level of the connector 2.

[0021] Please refer to Figure 3 , in one embodiment, in this embodiment, preferably, the fork 1 includes a fork body 11 and reinforcing plates 12. The number of reinforcing plates 12 is two, which are symmetrically installed inside the cavity of the fork body 11. By installing two reinforcing plates 12, the structural strength and stiffness of the fork body 11 are increased.

[0022] Please refer to Figure 5 , in one embodiment, in this embodiment, preferably, the fork frame 3 includes a cross beam plate 31, a column plate 32, a vertical beam plate 33 and a cargo retaining plate 34 that are fixedly connected to each other, and the thickness of the cross beam plate 31 ≥ 30 mm.

[0023] The following will describe this technical solution in combination with specific embodiments. The specific implementation manners are as follows:

[0024] For the fork frame 3 of a 2-ton pallet stacker, the connector 2 is made of a cast steel part, the length of the reinforcing plate 12 is 450 mm, the radius of the arc transition surface structure 221 is 30 mm, the thickness of the wing plate 21 is 32 mm, and the thickness of the cross beam plate 31 is 32 mm.

[0025] Through calculation by finite element analysis software, the stress levels of the fork frame structure in this embodiment are all not greater than the allowable limit of the component, and the fatigue life of the welds is also greater than the use requirements. This proves that the fork frame structure of the present utility model overcomes the defects of the prior art and achieves the purpose of improving the structural strength and extending the service life.

[0026] Although this specification is described according to the implementation manners, not every implementation manner only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other implementation manners that can be understood by those skilled in the art.

[0027] Therefore, the above description is only a preferred embodiment of the present application and is not used to limit the scope of implementation of the present application; that is, all equivalent transformations made according to the scope of the claims of the present application fall within the protection scope of the claims of the present application.

Claims

1. A fork frame structure of a pallet stacker, comprising forks (1) and a fork frame (3), characterized in that, A connector (2) is provided between the fork (1) and the fork carriage (3). The connector (2) includes a wing plate (21) and a web plate (22), and an arc transition surface structure (221) is provided between the horizontal section and the vertical section of the web plate (22).

2. The fork frame structure of the pallet stacker according to claim 1, characterized in that The number of the wing plates (21) is two, and they are symmetrically installed on both sides of the web plate (22).

3. The fork frame structure of the pallet stacker according to claim 2, characterized in that, The distance between the two wing plates (21) is adapted to the width of the fork (1).

4. The fork carrier structure of the pallet stacker according to claim 1, characterized in that, The fork (1) includes a fork body (11) and reinforcing plates (12). The number of the reinforcing plates (12) is two, and they are symmetrically installed inside the cavity of the fork body (11).

5. The forklift carriage structure of the pallet stacker according to claim 1, characterized in that, The fork carriage (3) includes a cross beam plate (31), a column plate (32), a vertical beam plate (33) and a cargo retaining plate (34) which are fixedly connected to each other, and the thickness of the cross beam plate (31) ≥ 30 mm.

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