Electric fork truck counterweight

Abstract

The utility model relates to the technical field of fork truck, disclose a kind of electric fork truck counterweight, including the counterweight mainboard for installing lithium battery, two ends extend outward and form first, second arc-shaped mounting plate for installing pump motor assembly, hydraulic oil tank, three form the round-like gap for installing drive unit;First arc-shaped mounting plate and counterweight mainboard are diagonally provided with main mounting hole, respectively pass through corresponding main boss formed on first arc-shaped mounting plate and counterweight mainboard, by bolt sequentially penetrating main mounting hole and main boss, electric fork truck counterweight can be fixed to frame;First, second arc-shaped mounting plate is respectively provided with a lifting threaded hole, two lifting threaded holes are arranged at the centroid connecting line of electric fork truck counterweight and symmetrically distributed on the two sides of centroid;Counterweight mainboard and second arc-shaped mounting plate are also provided with a pair of auxiliary boss capable of cooperating with main boss to level. Its simple structure, the ability of carrying fork truck key components is strong, stability is high, improves the use safety of whole vehicle.

Description

Technical Field

[0001] This utility model relates to the field of forklift technology, specifically to a counterweight for an electric forklift. Background Technology

[0002] Forklifts are a common type of industrial handling vehicle, mainly used for loading, unloading, stacking, and short-distance transportation of goods. They are widely used in warehouses, ports, factories, logistics centers, and other places.

[0003] With the implementation of environmental protection policies and the popularization of environmental protection concepts, more and more users are choosing electric forklifts, driving steady growth in market sales. Among them, lithium battery forklifts have gained particular favor due to their advantages, showing the most prominent sales growth momentum. Compared with lead-acid batteries, lithium batteries have significant advantages in lifespan, safety, and ease of use. However, lithium batteries are inherently lighter. To ensure stability, a solution is to add an iron block to the bottom of the lithium battery to achieve the same weight as lead-acid batteries. This makes the lithium battery casing more complex and increases the overall cost of the lithium battery. Furthermore, if the bottom counterweight of the lithium battery is not properly designed or securely installed, there is a possibility of it falling off or shifting, which can easily cause serious safety hazards to operators or equipment. Utility Model Content

[0004] The purpose of this invention is to overcome the problems of poor stability and safety hazards in the installation of the bottom counterweight of the lithium battery in the existing technology, and to provide a counterweight for electric forklifts. This counterweight has a simple structure, strong ability to support key components of the forklift, high stability, and improves the overall safety of the vehicle.

[0005] To achieve the above objectives, this utility model provides a counterweight for an electric forklift. The counterweight includes a main counterweight plate for mounting a lithium battery. Both ends of the main counterweight plate extend outwards to form a first arc-shaped mounting plate for mounting a pump motor assembly and a second arc-shaped mounting plate for mounting a hydraulic oil tank. The main counterweight plate, the first arc-shaped mounting plate, and the second arc-shaped mounting plate together form a near-circular notch for mounting a drive unit.

[0006] The first arc-shaped mounting plate has a main mounting hole, and the counterweight main plate has another main mounting hole diagonally opposite each other. The two main mounting holes pass through the corresponding main bosses formed on the first arc-shaped mounting plate and the counterweight main plate, respectively. Furthermore, the counterweight of the electric forklift can be fixed to the frame by bolts passing through the main mounting holes and the main bosses in sequence.

[0007] The first arc-shaped mounting plate and the second arc-shaped mounting plate are respectively provided with a lifting threaded hole. The two lifting threaded holes are located at the line connecting the center of gravity of the electric forklift counterweight and are symmetrically distributed on both sides of the center of gravity.

[0008] The counterweight main plate and the second arc-shaped mounting plate are also equipped with a pair of auxiliary bosses that can cooperate with the main boss to level the counterweight mounting surface of the electric forklift.

[0009] Preferably, the main mounting hole is a countersunk hole structure with two steps.

[0010] Preferably, the first arc-shaped mounting plate is provided with a plurality of boss mounting holes for mounting bosses, and the top surface of the boss is formed with a machined surface for mounting the pump motor assembly.

[0011] Preferably, the height of the boss is 4-6mm.

[0012] Preferably, multiple boss mounting holes are distributed around the main mounting hole.

[0013] Preferably, the second arc-shaped mounting plate has a pair of threaded mounting holes for mounting the hydraulic oil tank at a position away from the counterweight main plate.

[0014] Preferably, a semi-circular groove is provided next to a pair of threaded mounting holes for arranging the oil plug below the hydraulic oil tank; wherein, the groove opening on the semi-circular groove is used for tools to remove the oil plug.

[0015] Preferably, the boss surfaces of the main boss and the secondary boss are machined surfaces.

[0016] Preferably, the height of the main boss and the secondary boss is 4-6mm.

[0017] Preferably, the counterweight main board, the first arc-shaped mounting plate, and the second arc-shaped mounting plate are integrally formed.

[0018] According to the above technical solution, the counterweight mainboard is installed at the bottom of the lithium battery, with its two ends extending outward to form a first arc-shaped mounting plate and a second arc-shaped mounting plate, respectively, for mounting the pump motor assembly and hydraulic oil tank, thus ensuring overall force balance. Simultaneously, the counterweight mainboard, the first arc-shaped mounting plate, and the second arc-shaped mounting plate form a near-circular notch, reserving space for installing the drive unit, making the overall structure more compact and rational. Main mounting holes are provided on the first arc-shaped mounting plate and the counterweight mainboard, with two mounting holes diagonally arranged, and fixed to the frame with bolts. Two lifting threaded holes are also provided on the first and second arc-shaped mounting plates, located at the line connecting the counterweight's centers of mass, distributed on both sides of the center of mass, for assembling and lifting the counterweight. This ensures that the counterweight remains horizontal during lifting, preventing tilting and improving safety. In addition, the bottom of the counterweight is equipped with a main boss and a secondary boss. The surfaces of the bosses are all machined surfaces. When they work together, they can effectively ensure the flatness of the counterweight mounting surface, further improve stability, prevent the counterweight from falling off or shifting, and eliminate serious safety hazards to operators or equipment, making it safe and reliable. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the installation of the counterweight of an electric forklift according to one embodiment of the present invention;

[0020] Figure 2 This is a front structural schematic diagram of the counterweight of an electric forklift according to one embodiment of the present invention.

[0021] Figure 3 This is a schematic diagram of the rear structure of the counterweight of an electric forklift according to one embodiment of the present invention.

[0022] Explanation of reference numerals in the attached figures

[0023] 1-Electric forklift counterweight, 2-Frame, 3-Pump motor assembly, 4-Hydraulic oil tank, 11-Main mounting hole, 12-Lifting threaded hole, 13-Boss mounting hole, 14-Threaded mounting hole, 15-Large semi-circular groove, 16-Secondary boss, 17-Main boss. Detailed Implementation

[0024] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0025] In this utility model, unless otherwise stated, directional words such as "inner", "outer", and "below" contained in the terminology only represent the orientation of the term in its conventional use or are common terms understood by those skilled in the art, and should not be regarded as limitations on the term.

[0026] See Figures 1 to 3 This utility model provides a counterweight for an electric forklift. The counterweight includes a main counterweight plate for mounting a lithium battery. Both ends of the main counterweight plate extend outwards to form a first arc-shaped mounting plate for mounting a pump motor assembly 3 and a second arc-shaped mounting plate for mounting a hydraulic oil tank 4. The main counterweight plate, the first arc-shaped mounting plate, and the second arc-shaped mounting plate together form a near-circular notch for mounting a drive unit.

[0027] The first arc-shaped mounting plate is provided with a main mounting hole 11, and the counterweight main plate is provided with another main mounting hole 11 diagonally. The two main mounting holes 11 pass through the corresponding main bosses 17 formed on the first arc-shaped mounting plate and the counterweight main plate, respectively. Furthermore, the electric forklift counterweight can be fixed to the frame 2 by bolts passing through the main mounting holes 11 and the main bosses 17 in sequence.

[0028] The first arc-shaped mounting plate and the second arc-shaped mounting plate are each provided with a lifting threaded hole 12. The two lifting threaded holes 12 are located at the line connecting the center of gravity of the electric forklift counterweight and are symmetrically distributed on both sides of the center of gravity.

[0029] The counterweight main plate and the second arc-shaped mounting plate are also provided with a pair of auxiliary bosses 16 that can cooperate with the main boss 17 to level the counterweight mounting surface of the electric forklift.

[0030] Through the above technical solution, the counterweight mainboard is installed at the bottom of the lithium battery, with its two ends extending outward to form a first arc-shaped mounting plate and a second arc-shaped mounting plate, respectively, for mounting the pump motor assembly and hydraulic oil tank, thus ensuring overall force balance. Simultaneously, the counterweight mainboard, the first arc-shaped mounting plate, and the second arc-shaped mounting plate form a near-circular notch, reserving space for installing the drive unit, making the overall structure more compact and rational. Main mounting holes 11 are provided on the first arc-shaped mounting plate and the counterweight mainboard, with the two mounting holes diagonally arranged and fixed to the frame 2 by bolts. Two lifting threaded holes 12 are also provided on the first and second arc-shaped mounting plates, located at the line connecting the counterweight's centers of mass, distributed on both sides of the center of mass, for assembling and lifting the counterweight. This ensures that the counterweight remains horizontal during lifting, preventing tilting and improving safety. In addition, the bottom of the counterweight is equipped with a main boss 17 and a secondary boss 16. The surfaces of the bosses are all machined surfaces. When they work together, they can effectively ensure the flatness of the counterweight mounting surface, further improve stability, prevent the counterweight from falling off or shifting, and eliminate serious safety hazards to operators or equipment, making it safe and reliable.

[0031] In this embodiment, to meet the assembly and fastening requirements of the electric forklift's counterweight, preferably, the main mounting hole 11 is a countersunk hole structure with two steps. The first step has a larger diameter and a shallower depth to accommodate the bolt heads or nuts used for assembly, facilitating the concealment of fasteners and preventing their exposure from affecting the installation or disassembly of other components. The second step has a smaller diameter and a deeper depth to enhance positioning and improve the tightness of the fastener.

[0032] In this embodiment, the first arc-shaped mounting plate preferably has a plurality of boss mounting holes 13 for mounting bosses, and the top surface of the boss has a machined surface for mounting the pump motor assembly 3. In this way, the flat surface formed by precision machining on the top of the boss can compensate for the dimensional difference of the relatively rough casting when mounting the pump motor assembly 3, thereby improving the positioning accuracy. At the same time, the boss can also withstand the vibration and torque during motor operation, avoid deformation, and ensure stable stress distribution.

[0033] In practical design and use, if the boss height is too high, assembly interference may occur, leading to collisions and damage with adjacent components, and there is also a risk to strength; when the height-to-diameter ratio is too large, it is prone to breakage during vibration. Conversely, if the boss height is too low, positioning failure may occur, making it impossible to align the pump motor assembly 3 with the pipeline or drive shaft. Furthermore, insufficient effective engagement length of the fastening bolts can lead to unstable connections. To avoid these issues, a boss height of 4-6mm is preferred. Similarly, preferably, the boss surfaces of the main boss 17 and the secondary boss 16 are machined surfaces, and the heights of the main boss 17 and the secondary boss 16 are also 4-6mm.

[0034] Furthermore, in order to improve the stability of the pump motor assembly 3 after the multiple bosses are installed and to prevent the pump motor assembly 3 from vibrating during use, it is preferable to distribute the multiple boss mounting holes 13 around the main mounting hole 11.

[0035] In this embodiment, in order to provide sufficient and stable support for the hydraulic oil tank 4, it is preferable to provide a pair of threaded mounting holes 14 for mounting the hydraulic oil tank 4 at a position on the second arc-shaped mounting plate away from the counterweight main plate.

[0036] In this embodiment, a semi-circular groove 15 is preferably provided next to a pair of threaded mounting holes 14 for accommodating the oil plug below the hydraulic oil tank 4; wherein, the opening of the groove 15 is used for tools to remove the oil plug. This structure not only reasonably reserves the installation position, but also takes into account the convenience of manual operation during subsequent installation or maintenance, effectively reducing the difficulty of disassembly and assembly operations and improving the work efficiency of disassembly and assembly operations.

[0037] The electric forklift counterweight provided by this utility model serves as a connecting component of the entire vehicle, bearing important key components of the electric forklift. Therefore, in order to significantly improve overall rigidity, reduce assembly errors, and optimize load transmission path, the counterweight main board, the first arc-shaped mounting plate, and the second arc-shaped mounting plate are preferably integrally formed.

[0038] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings; however, the present invention is not limited thereto. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, including combinations of various specific technical features in any suitable manner. To avoid unnecessary repetition, the present invention will not describe the various possible combinations separately. However, these simple modifications and combinations should also be considered as the content disclosed in the present invention and are all within the protection scope of the present invention.

Claims

1. An electric fork lift truck counterweight, characterized in that The electric forklift counterweight includes a counterweight main board for mounting lithium batteries. The two ends of the main board extend outwards to form a first arc-shaped mounting plate for mounting the pump motor assembly (3) and a second arc-shaped mounting plate for mounting the hydraulic oil tank (4). The main board, the first arc-shaped mounting plate, and the second arc-shaped mounting plate together form a near-circular notch for mounting the drive unit. The first arc-shaped mounting plate is provided with a main mounting hole (11), and the counterweight main plate is provided with another main mounting hole (11) diagonally. The two main mounting holes (11) pass through the corresponding main bosses (17) formed on the first arc-shaped mounting plate and the counterweight main plate, respectively. The electric forklift counterweight can be fixed to the frame (2) by bolts passing through the main mounting holes (11) and the main bosses (17) in sequence. The first arc-shaped mounting plate and the second arc-shaped mounting plate are respectively provided with a lifting threaded hole (12). The two lifting threaded holes (12) are located at the line connecting the center of gravity of the electric forklift counterweight and are symmetrically distributed on both sides of the center of gravity. The counterweight main plate and the second arc-shaped mounting plate are also provided with a pair of auxiliary bosses (16) that can cooperate with the main boss (17) to level the counterweight mounting surface of the electric forklift.

2. The electric forklift counterweight according to claim 1, characterized in that, The main mounting hole (11) is a countersunk hole structure with two steps.

3. The electric forklift counterweight according to claim 2, characterized in that, The first arc-shaped mounting plate is provided with a plurality of boss mounting holes (13) for mounting bosses, and the top surface of the boss is formed with a machined surface for mounting the pump motor assembly (3).

4. The electric forklift counterweight according to claim 3, characterized in that, The height of the boss is 4-6mm.

5. The electric forklift counterweight according to claim 3 or 4, characterized in that, Multiple boss mounting holes (13) are distributed around the main mounting hole (11).

6. The electric forklift counterweight according to claim 1, characterized in that, The second arc-shaped mounting plate has a pair of threaded mounting holes (14) for mounting the hydraulic oil tank (4) at a position away from the counterweight main plate.

7. The electric forklift counterweight according to claim 6, characterized in that, A semi-circular groove (15) is provided next to a pair of threaded mounting holes (14) for arranging the oil plug below the hydraulic oil tank (4); wherein, the groove opening on the semi-circular groove (15) is used for tools to remove the oil plug.

8. The electric forklift counterweight according to claim 1, characterized in that, The boss surfaces of the main boss (17) and the secondary boss (16) are machined surfaces.

9. The electric forklift counterweight according to claim 8, characterized in that, The height of the main boss (17) and the secondary boss (16) is 4-6mm.

10. The electric forklift counterweight according to any one of claims 1-9, characterized in that, The counterweight main board, the first arc-shaped mounting plate, and the second arc-shaped mounting plate are integrally formed.

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