Counterbalanced forklift truck and frame structure thereof

Abstract

The counterbalance forklift truck frame structure comprises a main frame, and the main frame comprises a head portion, a middle portion and a tail portion which are integrally formed. Wherein the left side and the right side of the head part respectively extend forwards to be provided with a first connecting arm; the middle part is provided with a first containing cavity, the front side face of the first containing cavity is connected with the rear end of the head part, and the front side face of the first containing cavity is used for installing a drive axle assembly; the tail portion is provided with a second containing cavity used for installing an auxiliary balance weight and a third containing cavity used for containing a steering axle assembly, the second containing cavity is located above the third containing cavity, the second containing cavity and the third containing cavity are separated through an installation platform, and the front end of the installation platform is connected with the upper end of the rear side face of the first containing cavity. A first opening is formed in the installation platform, and a rear axle frame in the steering axle assembly penetrates through the first opening to be installed on the installation platform. In the scheme, the main frame is integrally cast and formed, welding parts and welding procedures are reduced, the cost is reduced, and the overall assembly efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of forklift technology, and in particular to a counterbalance forklift and its frame structure. Background Technology

[0002] A counterbalance forklift uses a counterweight mounted on the rear frame to balance the weight of the goods lifted by the front forks, enabling the forklift to move goods smoothly. Currently, most counterbalance forklift frames are welded, with numerous components and a complex welding process. For example, patent CN211198502U discloses a forklift counterweight and electric forklift where the counterweight is cast in one piece. This reduces assembly steps, simplifies the frame structure, and improves processing efficiency by requiring only the corresponding mold. However, this solution still requires welding to assemble the frame, resulting in a complex structure and lower assembly efficiency. Utility Model Content

[0003] In order to solve the above-mentioned technical problems, the purpose of this utility model is to provide a counterbalanced forklift with simple structure and high assembly efficiency and its frame structure.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A counterbalance forklift frame structure includes a main frame, which comprises an integrally formed head, middle, and rear section; wherein:

[0006] The head has a first connecting arm extending forward on both its left and right sides;

[0007] In the middle, a first receiving cavity for installing the battery tank assembly is provided. The front side of the first receiving cavity is connected to the rear end of the head. The front side of the first receiving cavity is used to install the drive axle assembly.

[0008] At the rear, there is a second receiving cavity for installing the secondary counterweight and a third receiving cavity for accommodating the steering axle assembly. The second receiving cavity is located above the third receiving cavity. The second receiving cavity and the third receiving cavity are separated by a mounting platform. The front end of the mounting platform is connected to the upper end of the rear side of the first receiving cavity. A first opening is opened on the mounting platform, and the rear axle frame of the steering axle assembly is installed on the mounting platform through the first opening.

[0009] Preferably, the front side of the first receiving cavity has a plurality of first positioning holes and a plurality of first mounting holes; the drive axle assembly includes a drive bridge frame, the rear end of the drive bridge frame has a second positioning hole corresponding to the first positioning hole and a second mounting hole corresponding to the first mounting hole, the first positioning hole and the second positioning hole are fixedly connected by positioning pins, the first mounting hole and the second mounting hole are fixedly connected by bolts, and the second mounting hole is an oval hole.

[0010] Preferably, the side of the first connecting arm furthest from the center of the main frame is arranged in an arc shape.

[0011] Preferably, the front side of the first receiving cavity is provided with a first notch that opens upwards.

[0012] Preferably, the upper surfaces of the two first connecting arms are each provided with a first connecting portion, and the first connecting portion has a wire hole and a third mounting hole for installing the front leg of the safety canopy.

[0013] Preferably, the bottom plate of the first receiving cavity is provided with multiple fourth mounting holes for installing the battery tank assembly, and the bottom plate is also provided with a water leakage hole and a tank drain hole.

[0014] Preferably, a boss is provided on each of the left and right sides of the second receiving cavity, and the boss is provided with multiple fifth mounting holes for installing the rear legs of the safety canopy; the upper part of the rear side of the second receiving cavity is recessed to form two first sinkholes and two second sinkholes, the two first sinkholes are symmetrically arranged, the two second sinkholes are symmetrically arranged, the first sinkholes are higher than the second sinkholes and the first sinkholes are located outside the second sinkholes, the first sinkholes are provided with multiple sixth mounting holes for installing the rear cover plate, and the second sinkholes are provided with multiple ninth mounting holes for installing the auxiliary counterweight; a seventh mounting hole for installing an external charging port is opened on the left or right side of the second receiving cavity.

[0015] Preferably, the periphery of the first opening on the mounting platform is provided with multiple eighth mounting holes for mounting the rear axle in the steering axle assembly.

[0016] Preferably, a lifting arm is provided at the connection between the front end of the installation platform and the upper end of the rear side of the first receiving cavity.

[0017] A counterbalance forklift, comprising the frame structure of a counterbalance forklift as described above.

[0018] The present invention has the following beneficial effects due to the adoption of the above technical solutions: In the present invention, the main frame of the vehicle frame is integrally cast, which reduces the number of welded parts and welding processes, and reduces production costs. Moreover, the main frame has a low center of gravity, which improves the stability of the forklift. By dividing the forklift into several parts, the forklift parts can be assembled separately on different production lines or in different areas before being transported to the main frame assembly line for final assembly, thereby improving the overall assembly efficiency. Attached Figure Description

[0019] Figure 1 This is one of the structural schematic diagrams of the main frame in this utility model;

[0020] Figure 2 This is the second structural schematic diagram of the main frame in this utility model;

[0021] Figure 3 This is an exploded view of the forklift in this utility model.

[0022] Figure 4 This is a schematic diagram of the forklift installation structure in this utility model.

[0023] Figure label:

[0024] 1. Main frame; 11. Head; 111. First connecting arm; 112. First connecting part; 1121. Cable guide hole; 1122. Third mounting hole; 12. Middle part; 121. First receiving cavity; 1211. Front side of the first receiving cavity; 12111. First positioning hole; 12112. First mounting hole; 1212. Rear side of the first receiving cavity; 1213. Bottom plate of the first receiving cavity; 12131. Fourth mounting hole; 12132. Drain hole; 12133. Oil tank drain hole; 13. Tail; 131. Second receiving cavity; 1311. Boss; 13111. Fifth mounting hole; 131 2. Rear side of the second receiving cavity; 13121, First recessed platform; 131211, Sixth mounting hole; 13122, Second recessed platform; 131221, Ninth mounting hole; 1313, Seventh mounting hole; 132, Third receiving cavity; 133, Mounting platform; 1331, First opening; 13311, Eighth mounting hole; 14, Lifting arm; 110, Drive bridge; 1101, Second positioning hole; 1102, Second mounting hole; 120, Drive axle assembly; 160, Steering axle assembly; 170, Battery fuel tank assembly; 180, Sub-counterweight; 190, Floor assembly; 200, Battery cover assembly; 210, Safety canopy assembly; 220, Steering wheel assembly; 230, Mast assembly. Detailed Implementation

[0025] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0026] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more, unless otherwise expressly defined.

[0028] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0030] like Figures 1 to 4 As shown, this solution discloses a frame structure for a counterbalance forklift, including a main frame 1, which includes an integrally cast head 11, a middle section 12, and a tail section 13.

[0031] The head 11 has a first connecting arm 111 extending forward on both its left and right sides. The side of the first connecting arm 111 away from the middle 12 of the main frame 1 is arc-shaped so as not to affect the operation of the drive wheel in the drive axle assembly 120. The upper surface of each of the two first connecting arms 111 has a first connecting part 112 protruding from it. The first connecting part 112 has a wire hole 1121 and a third mounting hole 1122 for mounting the front leg of the safety canopy.

[0032] The middle section 12 has a first receiving cavity 121 for installing the battery tank assembly 170. The front side 1211 of the first receiving cavity 121 is connected to the rear end of the head 11. The front side 1211 of the first receiving cavity 121 is used to install the drive axle assembly 120. Specifically, the front side 1211 of the first receiving cavity 121 has a plurality of first positioning holes 12111 and a plurality of first mounting holes 12112. The drive axle assembly 120 includes a drive bridge frame 110. The rear end of the drive bridge frame 110 has a second positioning hole 1101 corresponding to the first positioning hole 12111 and a second mounting hole 1102 corresponding to the first mounting hole 12112. The first positioning hole 12111 and the second positioning hole 1101 are fixedly connected by positioning pins. The first mounting hole 12112 and the second mounting hole 1102 are fixedly connected by bolts. The second mounting hole 1102 is an oblong hole, so that the drive bridge frame 110 has a certain adjustment space during installation. The front side 1211 of the first receiving cavity 121 has a first recess with an upward opening, which facilitates heat dissipation of the battery tank assembly 170 inside the first receiving cavity 121, and can further reduce production costs without affecting strength. The bottom plate 1213 of the first receiving cavity 121 has multiple fourth mounting holes 12131 for mounting the battery tank assembly 170, and the bottom plate 1213 also has a drain hole 12132 and a tank drain hole 12133.

[0033] The rear end 13 is provided with a second receiving cavity 131 for installing the secondary counterweight 180 and a third receiving cavity 132 for accommodating the steering axle assembly 160. The second receiving cavity 131 is located above the third receiving cavity 132. The second receiving cavity 131 and the third receiving cavity 132 are separated by a mounting platform 133. The front end of the mounting platform 133 is connected to the upper end of the rear side 1212 of the first receiving cavity 121. The mounting platform 133 has a first opening 1331. The rear axle frame in the steering axle assembly 160 passes through the first opening 1331 and is mounted on the mounting platform 133. Specifically, a boss 1311 is provided on each of the left and right sides of the second receiving cavity 131. The boss 1311 has multiple fifth mounting holes 13111 for installing the rear legs of the safety canopy. The upper part of the rear side 1312 of the second receiving cavity 131 is recessed to form two first recessed platforms 13121 and two second recessed platforms 13122. The two first recessed platforms 13121 are symmetrically arranged, and the two second recessed platforms 13122 are symmetrically arranged. The first recessed platforms 13121 are higher than the second recessed platforms 13122 and are located outside the second recessed platforms 13122. The first recessed platforms 13121 have multiple sixth mounting holes 131211 for installing the rear cover plate of the battery cover assembly 200. The second recessed platforms 13122 have multiple ninth mounting holes 131221 for installing the auxiliary counterweight 180. A seventh mounting hole 1313 for installing an external charging port is opened on the left or right side of the second receiving cavity 131. The mounting platform 133 has a plurality of eighth mounting holes 13311 around the first opening 1331 for mounting the rear axle of the steering axle assembly 160.

[0034] To facilitate the hoisting of the entire main frame 1, a hoisting arm 14 is provided at the connection between the front end of the installation platform 133 and the upper end of the rear side 1212 of the first receiving cavity 121.

[0035] This utility model also discloses a counterbalance forklift, including the frame structure of a counterbalance forklift as described above, and further including a drive axle assembly 120, a steering axle assembly 160, a battery tank assembly 170, a counterweight 180, a floor assembly 190, a battery cover assembly 200, a safety canopy assembly 210, a steering wheel assembly 220, and a mast assembly 230.

[0036] like Figure 3 and Figure 4As shown, during vehicle assembly, a positioning pin is first installed in the second positioning hole 1101 of the drive axle 110. The main frame 1 is then hoisted, and the positioning pin is inserted into the first positioning hole 12111 of the main frame 1. Bolts are then screwed into the second mounting hole 1102 of the drive axle 110 and the first mounting hole 12112 of the main frame 1 to connect the drive axle 110 and the main frame 1. Other components of the drive axle assembly 120, the floor assembly 190, and the mast assembly 230 are mounted on the drive axle 110. The first opening 1331 on the main frame 1 is used to install the steering axle assembly 160. During assembly, bolts are used to fix the steering axle assembly 160 to the mounting platform 133 at the rear 13 of the main frame 1. The fourth mounting hole 12131 on the first receiving cavity 121 of the middle 12 is used to fix the battery tank assembly 170. During assembly, bolts are used to fix the battery tank assembly 170 to the main frame 1. The third mounting hole 1122 and the fifth mounting hole 13111 are the front and rear fixing points of the mounting canopy assembly 210. Bolts are used to fix the safety canopy assembly 210 to the main frame 1. The steering wheel assembly 220 is mounted on the mounting canopy assembly 210. The wiring hole 1121 is used for routing the front light wires; the drain hole 12132 is used for draining water from the middle section 12 of the main frame 1; and the oil tank drain hole 12133 is used for changing the hydraulic oil during maintenance. The ninth mounting hole 131221 is used to fix the secondary counterweight 180 when additional counterweights are needed for certain models. The lifting arm 14 is used to lift the main frame 1 during transport; lifting straps can be used to lift this area. The sixth mounting hole 131211 is used for installing the rear cover plate on the battery cover assembly 200, which is bolted to the safety canopy assembly 210. The seventh mounting hole 1313 is used to install an external charging harness assembly. At this point, most of the components of the counterbalance forklift have been installed on this cast frame. In this design, the main frame 1 is integrally cast, resulting in fewer welded parts and welding processes, lower production costs, and higher assembly efficiency for the forklift.

[0037] All features described in the specification, appended claims and drawings, whether individually or in any combination thereof, are essential features of this utility model.

[0038] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions, alterations, deletions of some features, additions of features, or recombinations of features to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the innovative principles of the present invention shall still fall within the scope of the technical solutions of the present invention.

Claims

1. A frame structure for a counterbalance forklift, characterized in that, Includes a main frame (1), which comprises an integrally formed head (11), middle section (12), and tail section (13); wherein: The head (11) has a first connecting arm (111) extending forward on its left and right sides respectively. The middle part (12) has a first receiving cavity (121) for installing the battery tank assembly (170). The front side (1211) of the first receiving cavity (121) is connected to the rear end of the head (11). The front side (1211) of the first receiving cavity (121) is used to install the drive axle assembly (120). The rear (13) is provided with a second receiving cavity (131) for installing the sub-counterweight (180) and a third receiving cavity (132) for accommodating the steering axle assembly (160). The second receiving cavity (131) is located above the third receiving cavity (132). The second receiving cavity (131) and the third receiving cavity (132) are separated by a mounting platform (133). The front end of the mounting platform (133) is connected to the upper end of the rear side (1212) of the first receiving cavity (121). The mounting platform (133) has a first opening (1331). The rear axle frame of the steering axle assembly (160) passes through the first opening (1331) and is mounted on the mounting platform (133).

2. The frame structure of a counterbalance forklift according to claim 1, characterized in that, The front side (1211) of the first receiving cavity (121) has a plurality of first positioning holes (12111) and a plurality of first mounting holes (12112); the drive axle assembly (120) includes a drive bridge (110), the rear end of the drive bridge (110) has a second positioning hole (1101) corresponding to the first positioning hole (12111) and a second mounting hole (1102) corresponding to the first mounting hole (12112), the first positioning hole (12111) and the second positioning hole (1101) are fixedly connected by positioning pins, the first mounting hole (12112) and the second mounting hole (1102) are fixedly connected by bolts, and the second mounting hole (1102) is an oval hole.

3. The frame structure of a counterbalance forklift according to claim 2, characterized in that, The first connecting arm (111) is arranged in an arc shape on one side away from the middle (12) of the main frame (1).

4. The frame structure of a counterbalance forklift according to claim 1, characterized in that, The front side (1211) of the first receiving cavity (121) is provided with a first notch that opens upward.

5. The frame structure of a counterbalance forklift according to claim 1, characterized in that, The upper surfaces of the two first connecting arms (111) are respectively provided with a first connecting part (112), and the first connecting part (112) has a wire hole (1121) and a third mounting hole (1122) for installing the front leg of the safety canopy.

6. The frame structure of a counterbalance forklift according to claim 1, characterized in that, The bottom plate (1213) of the first receiving cavity (121) is provided with a plurality of fourth mounting holes (12131) for installing the battery tank assembly (170). The bottom plate (1213) also has a water leakage hole (12132) and a tank drain hole (12133).

7. The frame structure of a counterbalance forklift according to claim 1, characterized in that, The second receiving cavity (131) has a boss (1311) on each of its left and right sides. The boss (1311) has multiple fifth mounting holes (13111) for installing the rear legs of the safety canopy. The upper part of the rear side (1312) of the second receiving cavity (131) is recessed to form two first recessed platforms (13121) and two second recessed platforms (13122). The two first recessed platforms (13121) are symmetrically arranged, and the two second recessed platforms (13122) are symmetrically arranged. The first sinking platform (13121) is located outside the second sinking platform (13122), which is higher than the second sinking platform (13122). The first sinking platform (13121) is provided with a number of sixth mounting holes (131211) for installing the rear cover plate, and the second sinking platform (13122) is provided with a number of ninth mounting holes (131221) for installing the auxiliary counterweight (180). The second receiving cavity (131) has a seventh mounting hole (1313) for installing the external charging port on the left or right side.

8. The frame structure of a counterbalance forklift according to claim 1, characterized in that, The mounting platform (133) has a plurality of eighth mounting holes (13311) around the first opening (1331) for mounting the rear axle in the steering axle assembly (160).

9. The frame structure of a counterbalance forklift according to claim 1, characterized in that, A lifting arm (14) is provided at the connection between the front end of the installation platform (133) and the upper end of the rear side (1212) of the first receiving cavity (121).

10. A counterbalance forklift, characterized in that, The frame structure of a counterbalance forklift as described in any one of claims 1-9.

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