Counterweight for medium electric fork lift truck

Abstract

The utility model discloses a medium -sized electric fork truck counterweight, including by a plurality of metal plate piece welding formation's counterweight shell and fill in the filling body of counterweight shell inside, the metal plate piece includes at least one big curvature arc surface arc plate piece, at least one partial inclined plane inclined plane plate piece, at least one recessed plate piece of presenting step or recess and a plurality of plane plate piece, the utility model discloses a medium -sized electric fork truck counterweight, replaces foundry structure through welding structure, spares high -end mould expense, reduces the development cost and raw material cost of early stage, guarantees counterweight appearance modelling and use performance simultaneously, is applicable to the counterweight demand of medium -sized electric fork truck.

Description

Technical Field

[0001] This utility model belongs to the field of forklift technology, specifically, it relates to a counterweight for a medium-sized electric forklift. Background Technology

[0002] As a key component of medium-sized electric forklifts, the counterweight is mainly used to balance the load on the forks during forklift operation, avoid the risk of the forklift tipping forward and becoming unstable, and optimize the overall center of gravity distribution of the forklift to ensure the stability of the equipment during starting, braking, and steering. Therefore, its structural strength, appearance and design adaptability and cost control level have become important factors affecting the competitiveness of medium-sized electric forklift products.

[0003] In existing technologies, counterweights for medium-duty electric forklifts generally adopt a one-piece cast structure design to meet the requirements of their complex appearance. Specifically, to adapt to the overall body contour and installation space constraints of medium-duty electric forklifts, the counterweight typically needs to be designed with special structures such as large-curvature arcs, partial slopes, and stepped grooves. Among them, the large-curvature arc structure is used to fit the curved transition area of ​​the forklift body, avoiding interference between the counterweight and other parts of the body; the partial slope structure is used to optimize the space utilization of the counterweight and reduce air resistance during forklift operation; the stepped groove structure is mainly used to match the mounting interface of the forklift frame, ensuring that the counterweight can be accurately positioned and securely assembled.

[0004] However, the aforementioned one-piece cast counterweight structure presents significant technical defects and cost risks in actual production and new product development. Firstly, due to its complex and unique shape, a dedicated casting mold must be designed and manufactured specifically for each counterweight. Considering the large size of medium-sized electric forklift counterweights, the casting mold needs high structural strength and precision. Its design, processing, and debugging involve multiple complex procedures, resulting in extremely high mold manufacturing costs, often requiring an initial investment of hundreds of thousands or even millions of yuan. Secondly, given the current volatile market demand and rapid product iteration of electric forklifts, many new medium-sized electric forklifts are in the R&D stage with uncertain market prospects. If a high investment in casting molds is made upfront for the counterweights, and the new product development fails, market promotion is hindered, or the product lifecycle is shortened, the initial mold investment cannot be recovered through subsequent product sales. This can easily lead to significant financial risks for companies during the new product development process, severely hindering the R&D and innovation of medium-sized electric forklift counterweights and even the entire forklift product development process.

[0005] In this application, the casting structure is changed to a welded structure. The large curvature arc is made of steel plate roll forming, the local slope is made of steel plate bending, and the stepped groove is made of segmented bending splicing. Then, these large curvature arc plates, local slope plates, stepped groove plates and ordinary flat structural plates are spliced ​​together, welded and ground to maintain the appearance of the counterweight. The interior is filled with steel scrap and concrete, which can reduce the cost of raw materials.

[0006] Chinese patent application number 202411292547.3 discloses a counterweight structure for a forklift robot, including an integrally cast counterweight block that serves as a frame. A drive wheel mounting portion is formed on the rear side of the counterweight block, and a drive wheel assembly is fixed to the drive wheel mounting portion via a drive wheel mounting plate. A first radar assembly is mounted on the counterweight block and fixed to it via a laser mounting plate. A battery mounting compartment is formed in the middle of the counterweight block, and the battery assembly is located within the battery mounting compartment. A gantry mechanism is mounted on the front side of the counterweight block. However, the technical solution disclosed in this patent document also fails to solve the aforementioned technical problems.

[0007] This invention provides a counterweight for medium-sized electric forklifts, with a particular focus on how to reduce costs. Utility Model Content

[0008] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a counterweight for a medium-sized electric forklift, with the aim of reducing costs.

[0009] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a counterweight block for a medium-sized electric forklift, comprising a counterweight shell formed by welding multiple metal plates, and a filler material filled inside the counterweight shell; The metal plate includes at least one arc-shaped plate with a large curvature arc surface, at least one inclined plate with a partial slope, at least one grooved plate with a step or groove, and several flat plates.

[0010] The arc-shaped plate has a radius of curvature greater than 300 mm and is formed by a roll forming process.

[0011] The bending angle of the inclined panel is 15° to 60°.

[0012] The grooved plate is welded from two or more bent steel plates.

[0013] The wall thickness of the counterweight shell is 6–12 mm.

[0014] The counterweight housing is provided with at least one lifting lug.

[0015] The counterweight block of this utility model for medium-sized electric forklifts uses a welded structure instead of a cast structure, saving high mold costs, reducing early development costs and raw material costs, while ensuring the appearance and performance of the counterweight block, and is suitable for the counterweight requirements of medium-sized electric forklifts. Attached Figure Description

[0016] This manual includes the following figures, which illustrate the following: Figure 1 This is a schematic diagram of the structure of the counterweight block for a medium-sized electric forklift according to this utility model; The components in the diagram are labeled as follows: 1. Arc-shaped plate; 2. Sloping plate; 3. Stepped groove plate; 4. First stepped groove bent plate; 5. First flat plate; 6. Second flat plate; 7. Third flat plate; 8. Lifting lug; 9. Second stepped groove bent plate; 10. Fourth flat plate. Detailed Implementation

[0017] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, in order to help those skilled in the art to have a more complete, accurate and in-depth understanding of the concept and technical solution of this utility model, and to facilitate its implementation.

[0018] like Figure 1 As shown, this utility model provides a counterweight for a medium-sized electric forklift, including a counterweight shell formed by welding multiple metal plates, and a filler inside the counterweight shell; the filler includes steel scrap and concrete, the steel scrap is evenly distributed inside the counterweight shell, and the concrete fills the gaps between the steel scrap and the gap between the counterweight shell and the steel scrap.

[0019] Specifically, the metal plate includes at least one arc-shaped plate 1 with a large curvature arc surface, at least one inclined plate 2 with a partial slope, at least one grooved plate with a step or groove, and several flat plates.

[0020] In this embodiment, the radius of curvature of the arc-shaped plate 1 is greater than 300 mm, and it is formed by a roll forming process.

[0021] In this embodiment, the bending angle of the inclined panel 2 is 15° to 60°. For example... Figure 1 As shown, the planar plate includes a first planar plate 5, a second planar plate 6, a third planar plate 7, a fourth planar plate 10, a fifth planar plate, and a sixth planar plate. An inclined plate 2 is located between two fourth planar plates 10, and both ends of the inclined plate 2 are welded to the lower ends of the two fourth planar plates 10. The upper ends of the two fourth planar plates 10 are welded to the two fifth planar plates.

[0022] like Figure 1As shown, the first flat plate 5 is welded to the upper ends of the two second flat plates 6 and the grooved plate. The first flat plate 5 and the fifth flat plate are horizontally positioned at the top of the counterweight shell. The two second flat plates 6 are located on opposite sides of the counterweight shell and are welded to the sides of the two arc-shaped plates 1. The two fifth flat plates are welded to the upper ends of the two arc-shaped plates 1. The sixth flat plate is located at the bottom of the counterweight shell and is welded to the lower ends of the two arc-shaped plates 1 and the two second flat plates 6. The third flat plate 7 is located between the grooved plate and the inclined plate 2 and is welded to both the grooved plate and the inclined plate 2.

[0023] The grooved plate is welded from two or more bent steel plates. In this embodiment, as... Figure 1 As shown, the grooved plate is welded together from a stepped grooved plate 3, a first stepped grooved bent plate 4, and a second stepped grooved bent plate 9. One end of the stepped grooved plate 3 is welded to a second flat plate 6, and the other end of the stepped grooved plate 3 is welded to one end of the first stepped grooved bent plate 4. The other end of the first stepped grooved bent plate 4 is welded to another second flat plate 6. The second stepped grooved bent plate 9 is welded to the stepped grooved plate 3.

[0024] In this embodiment, the wall thickness of the counterweight shell is 6 to 12 mm.

[0025] like Figure 1 As shown, the counterweight housing is equipped with four lifting lugs 8. Two of the lifting lugs 8 are fixedly installed on the first flat plate 5, and the other two are fixedly installed on the two fifth flat plates. The four lifting lugs 8 are arranged in a rectangular shape.

[0026] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention; or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A counterweight for a medium-sized electric forklift, characterized in that: It includes a counterweight shell formed by welding multiple metal plates, and a filler material filled inside the counterweight shell; The metal plate includes at least one arc-shaped plate with a large curvature arc surface, at least one inclined plate with a partial slope, at least one grooved plate with a step or groove, and several flat plates.

2. The counterweight for a medium-sized electric forklift according to claim 1, characterized in that: The radius of curvature of the arc-shaped plate is greater than 300 mm.

3. The counterweight for a medium-sized electric forklift according to claim 1, characterized in that: The bending angle of the inclined panel is 15° to 60°.

4. The counterweight for a medium-sized electric forklift according to any one of claims 1 to 3, characterized in that: The grooved plate is welded from two or more bent steel plates.

5. The counterweight for a medium-sized electric forklift according to any one of claims 1 to 3, characterized in that: The wall thickness of the counterweight shell is 6–12 mm.

6. The counterweight for a medium-sized electric forklift according to any one of claims 1 to 3, characterized in that: The counterweight housing is provided with at least one lifting lug.

Images