Forklift transmission and support connecting structure

Abstract

The utility model relates to the technical field of forklifts, in particular to a forklift transmission and support connecting structure which comprises a portal base and a drive axle structure, the base comprises a cross beam and two-claw supports installed at the two ends of the cross beam, installation grooves are formed in the inner side walls of the two-claw supports, and supporting shafts are connected into the installation grooves in a bolted mode; the drive axle structure comprises axle housings which are symmetrically arranged, and the axle housings are rotationally connected with the supporting shafts through gaps between claws of the two-claw supports. When the supporting shaft is used, the supporting shaft is installed in the installation groove through the bolt, the contact face of the supporting shaft and the contact face of the installation groove can be more tightly attached through continuous screwing of the bolt, and the tight attaching is beneficial to the supporting shaft and the installation groove in the operation process of equipment. The friction force between the supporting shaft and the mounting groove and the constraint of the mounting groove on the supporting shaft jointly act, so that part of shearing force generated by external load or operation is offset, and the possibility of bolt breakage is reduced; in addition, the use of a combined jack structure is avoided, and the stability of the whole structure is improved.

Description

Technical Field

[0001] This utility model relates to the field of forklift technology, and more specifically, to a connection structure between forklift transmission and support. Background Technology

[0002] The forklift mast is the main load-bearing component of a forklift, typically consisting of inner and outer masts, crossbeams, rollers, chains, or hydraulic cylinders. It supports and lifts goods, enabling the forklift to operate at different heights. The mast design must meet requirements for strength, rigidity, and stability to ensure it does not deform or break during operation. The drive axle is a crucial part of the forklift's drivetrain, responsible for transmitting power from the engine or electric motor to the wheels, allowing the forklift to move. The drive axle design must consider transmission efficiency, reliability, and durability, as well as adaptability to different road conditions. Simultaneously, the drive axle must work in conjunction with the steering system to enable the forklift's steering function.

[0003] There are many existing technologies for the connection structure between forklift drive and support, such as:

[0004] Chinese Patent Publication No. CN211594926U discloses a forklift mast connection structure. This forklift mast connection structure connects the mast and the drive axle. Two symmetrically arranged connectors are provided at the lower part of the mast. Each connector is vertically plate-shaped, with an insertion hole at its upper part that extends through the thickness direction of the connector. Two locking blocks abut against each other on both sides of the connector's thickness direction. These locking blocks are connected to the drive axle. A cylindrical crossbeam is connected to each of the two locking blocks, passing through and rotatably connecting to the insertion hole. Each locking block has an arc-shaped surface on its side facing the crossbeam, and the circumferential side of the crossbeam fits against this arc-shaped surface. This invention exhibits good overall structural integrity.

[0005] Therefore, it can be seen that most forklift drive and support connection structures generally adopt a socket design, in which the crossbeam passes through the socket and achieves a rotatable connection. However, in the patented technical solution mentioned, the socket is designed to be composed of two components. Although this design simplifies the installation process, the stability of the overall structure is affected because the socket is divided into two parts. In addition, although the annular socket provides convenience for the installation of the crossbeam, in actual use, this connection part mainly relies on bolts inserted into the crossbeam and the socket to ensure fixation. However, the shear force generated during equipment operation and the gap between the crossbeam and the socket may put great pressure on the bolts, thereby increasing the risk of bolt breakage.

[0006] In view of this, we propose a connection structure between forklift drive and support. Utility Model Content

[0007] The purpose of this utility model is to provide a connection structure between forklift transmission and support to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A forklift drive and support connection structure includes a mast base and a drive axle structure. The mast base includes a crossbeam and two-jaw supports mounted at both ends of the crossbeam. The inner sidewall of the two-jaw supports has a mounting groove, and a support shaft is bolted into the mounting groove. The drive axle structure includes symmetrically arranged axle housings, and the axle housings are rotatably connected to the support shafts through the gap between the jaws of the two-jaw supports.

[0010] As a further embodiment of this utility model: a stiffening plate is fixed on one side of the crossbeam located at the pointing end of the two-claw support, and the stiffening plate is the same length as the crossbeam.

[0011] As a further embodiment of this utility model, the dimensions of the contact surface between the support shaft and the mounting groove are matched.

[0012] As a further embodiment of this utility model: a bearing is sleeved in the middle of the support shaft, and the width of the bearing is smaller than the gap between the claws of the two-claw support; the bridge housing includes an insertion hole, and the bearing is sleeved in the insertion hole.

[0013] As a further embodiment of this utility model: the drive axle structure further includes a middle axle and axle heads symmetrically installed at both ends of the middle axle, and the axle housing is fixed between the middle axle and the axle heads by bolting.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The connection structure between the forklift drive and the support uses bolts to install the support shaft in the mounting groove. By continuously tightening the bolts, the contact surfaces of the support shaft and the mounting groove are tightly fitted. Thus, during the operation of the equipment, the friction between the support shaft and the mounting groove, as well as the constraint of the mounting groove on the support shaft, work together to offset some of the shear force generated by external loads or operations, reducing the possibility of bolt breakage.

[0016] 2. The connection structure between the forklift drive and support avoids the use of a combined plug-in structure, thus improving the overall structural stability. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this solution;

[0018] Figure 2 This is a schematic diagram of the overall structure of this solution;

[0019] Figure 3 This is a schematic diagram of the overall structure of this solution.

[0020] The meanings of the labels in the diagram are as follows:

[0021] 100. Gantry base; 101. Crossbeam; 102. Rib plate; 103. Two-claw support; 104. Support shaft; 105. Mounting slot;

[0022] 200. Drive axle structure; 201. Middle axle; 202. Axle housing; 203. Axle head. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Example

[0025] Currently, most forklift drive and support connection structures commonly use a socket design, where the crossbeam 101 passes through the socket and achieves a rotatable connection. However, when the socket is designed as a combination of two components, although this design simplifies the installation process, the overall structural stability is affected because the socket is divided into two parts. In addition, although the annular socket facilitates the installation of the crossbeam 101, in actual use, this connection mainly relies on bolts inserted into the crossbeam 101 and the socket to ensure fixation. However, the shearing force generated during equipment operation and the gap between the crossbeam 101 and the socket may put significant pressure on the bolts, thereby increasing the risk of bolt breakage.

[0026] Therefore, please refer to Figure 1 , Figure 2 and Figure 3As shown, the purpose of this embodiment is to provide a connection structure for forklift drive and support. This connection structure includes a mast base 100 and a drive axle structure 200. If there is a gap between the crossbeam 101 and the insertion hole, the crossbeam 101 will wobble within the insertion hole, increasing the risk of bolt breakage. Therefore, the mast base 100 includes a crossbeam 101 and two-jaw supports 103 welded and fixed to both ends of the crossbeam 101. The inner sidewall of the two-jaw support 103 has a mounting groove 105, and bolts are inserted into the mounting groove 105. A support shaft 104 is connected, and the contact surface between the support shaft 104 and the mounting groove 105 is flat. The support shaft 104 is installed in the mounting groove 105 using bolts. By continuously tightening the bolts, the contact surfaces of the support shaft 104 and the mounting groove 105 are tightly fitted. Thus, during the operation of the equipment, the friction between the support shaft 104 and the mounting groove 105, as well as the constraint of the mounting groove 105 on the support shaft 104, work together to offset part of the shear force generated by external loads or operations, reducing the possibility of bolt breakage.

[0027] Since the drive axle structure 200 needs to be rotated up and down for adjustment during use, the drive axle structure 200 includes symmetrically mounted axle housing 202. The axle housing 202 is rotatably connected to the support shaft 104 through the gap between the claws of the two-claw support 103, avoiding the use of a combined plug structure and improving the stability of the overall structure.

[0028] Because the pressure on the gantry base 100 causes the two two-jaw supports 103 to contract inward, making the crossbeam 101 prone to bending and breakage, a stiffening plate 102 is welded and fixed to the side of the crossbeam 101 located at the pointing end of the two-jaw supports 103. The stiffening plate 102 is the same length as the crossbeam 101. By adding the stiffening plate 102, the stability of the crossbeam 101 under stress is enhanced. This reinforcement method ensures that the crossbeam 101 is not easily deformed or damaged when subjected to various external forces, thereby improving the load-bearing capacity of the overall structure. Furthermore, during the stress process, the stiffening plate 102 can disperse and absorb some of the stress, thereby reducing the stress burden on the crossbeam 101 itself. This helps to extend the service life of the crossbeam 101 and reduce fatigue damage caused by stress concentration.

[0029] To improve the fit between the support shaft 104 and the mounting groove 105 during installation, the support shaft 104 includes a shaft body. A portion of each side of the shaft body is cut away to form a flat surface, the size of which matches the bottom size of the mounting groove 105. This flattened surface allows for a tight fit with the bottom of the mounting groove 105, reducing gaps after installation and enhancing structural stability and overall performance. It also prevents loosening or vibration caused by excessive gaps. Furthermore, this design reduces installation errors, improves installation accuracy and efficiency, and reduces installation time and cost. In addition, the increased fit means a larger contact area between the support shaft 104 and the mounting groove 105, thereby strengthening their connection and improving the overall load-bearing capacity of the structure, enabling it to withstand greater loads without damage.

[0030] To enable the up-and-down rotation adjustment function of the drive axle structure 200, a bearing is sleeved in the middle of the support shaft 104, and the width of the bearing is smaller than the gap between the claws of the two-claw support 103, thus avoiding direct contact and friction between the bearing and the two-claw support 103, thereby reducing unnecessary wear and energy loss. The axle housing 202 includes a socket, and the bearing is sleeved in the socket. By rotating the axle housing 202 through the bearing, the overall posture of the drive axle structure 200 will also change accordingly, thereby achieving precise adjustment of the vehicle's suspension system or transmission system. This up-and-down rotation adjustment function improves the vehicle's handling and stability.

[0031] Considering the complexity and diversity of the drive axle structure 200 in practical applications, and in order to meet higher load-bearing capacity and stability requirements, the drive axle structure 200 also includes a middle axle 201 and axle heads 203 symmetrically installed at both ends of the middle axle 201. The addition of these two components not only enhances the overall rigidity of the drive axle structure 200, but also provides it with a more reliable support and transmission method. The axle housing 202 is fixed between the middle axle 201 and the axle head 203 by bolting. This bolting method is not only simple and easy to implement, but also ensures that the relative position between the axle housing 202 and the middle axle 201 and the axle head 203 remains stable during rotation adjustment, avoiding structural failure caused by loose connection.

[0032] In summary, the working principle of this solution is as follows:

[0033] First, precisely insert the bearing on the support shaft 104 into the pre-set insertion hole of the axle housing 202, ensuring a tight and accurate fit between the bearing and the insertion hole. Next, place the assembled support shaft 104 (including the bearing) stably into the mounting groove 105. Simultaneously, place the insertion hole portion of the axle housing 202 into the gap between the claws of the two-jaw support 103. Utilizing the space between the claws avoids direct contact between the bearing and the two-jaw support 103 while ensuring the stability of the axle housing 202 during rotation. Subsequently, rotate the bolts to securely fix the support shaft 104 in the mounting groove 105, ensuring that the gap between the support shaft 104 and the mounting groove 105 is minimized during bolt rotation. Finally, use a torque wrench, impact wrench, or other tools to tighten the bolts until the support shaft 104 and the mounting groove 105 achieve a tight fit.

[0034] Although this specification is described according to implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0035] Therefore, the above description is only a preferred embodiment of this application and is not intended to limit the scope of this application; that is, all equivalent modifications made in accordance with the scope of the claims of this application shall be within the protection scope of the claims of this application.

Claims

1. A connection structure for forklift drive and support, comprising a mast base (100) and a drive axle structure (200), characterized in that: The gantry base (100) includes a crossbeam (101) and two-claw supports (103) installed at both ends of the crossbeam (101). The inner sidewall of the two-claw supports (103) has an installation groove (105), and a support shaft (104) is bolted into the installation groove (105). The drive axle structure (200) includes symmetrically arranged axle housings (202), and the axle housings (202) are rotatably connected to the support shafts (104) through the gap between the claws of the two-claw supports (103).

2. The connection structure between forklift drive and support according to claim 1, characterized in that: The crossbeam (101) is fixed with a stiffening plate (102) on one side of the two-claw support (103) and the stiffening plate (102) is the same length as the crossbeam (101).

3. The connection structure between forklift drive and support according to claim 1, characterized in that: The contact surface dimensions of the support shaft (104) and the mounting groove (105) are matched.

4. The connection structure between forklift drive and support according to claim 1, characterized in that: A bearing is sleeved in the middle of the support shaft (104), and the width of the bearing is smaller than the gap between the claws of the two-claw support (103). The bridge housing (202) includes a socket, and the bearing is sleeved in the socket.

5. The connection structure between forklift drive and support according to claim 1, characterized in that: The drive axle structure (200) also includes a middle axle (201) and axle heads (203) symmetrically installed at both ends of the middle axle (201). The axle housing (202) is bolted between the middle axle (201) and the axle heads (203).

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