Drive axle system of sitting type forward forklift

Abstract

The utility model discloses a driving axle system of a sitting type forward forklift, which comprises a frame and a driving axle arranged below the frame, the driving axle is provided with a driving part for controlling the frame to complete steering, and the driving axle is also provided with two auxiliary parts for preventing a vehicle from transversely tipping over; the auxiliary part comprises an upper spring seat installed on the drive axle, a lower spring seat is arranged below the upper spring seat, the upper spring seat and the lower spring seat are connected through a spring, and an auxiliary wheel is arranged on the lower spring seat. The auxiliary wheel is simple in structure, through the arrangement of the auxiliary part, the upper spring seat overcomes the action of spring force to move downwards until the upper spring seat makes contact with the lower spring seat, rigid connection between the auxiliary wheel and the drive axle is achieved, when a vehicle tends to be overturned transversely, overturning torque can be resisted, and the transverse stability of the whole vehicle can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of forklifts, in particular to a driving axle system of a sit-down forward-moving forklift. Background Art

[0002] The electric drive axle of a forklift needs to be effectively integrated with other components of the forklift, such as the traction system, braking system and control system. The development of system integration technology can improve the overall performance and simplify the manufacturing and maintenance of the forklift. This allows the sit-down reach forklift to maintain high performance while also having lower maintenance costs and a longer service life.

[0003] However, the existing ride-on type reach forklift drive axle system has the following problems: there is only one drive wheel installed in the center of the drive axle, the lateral stability of the whole vehicle is poor, and anti-rollover limit blocks are installed at both ends of the drive axle, which makes the vehicle passability poor. Therefore, a ride-on type reach forklift drive axle system is proposed. Utility Model Content

[0004] The utility model aims to provide a drive axle system for a sit-down forward reach forklift to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a drive axle system of a sit-on-type reach forklift, comprising a frame and a drive axle installed under the frame, the drive axle is provided with a drive unit for controlling the frame to complete steering, and the drive axle is also provided with two auxiliary units for preventing the vehicle from lateral tipping; the auxiliary unit comprises a spring upper seat installed on the drive axle, a spring lower seat is provided below the spring upper seat, the spring upper seat and the spring lower seat are connected by a spring, and an auxiliary wheel is provided on the spring lower seat.

[0006] As a further solution of the utility model: the two auxiliary parts are symmetrically distributed on the drive axle, and the drive part is located between the two auxiliary parts.

[0007] As a further solution of the utility model: the spring upper seat and the spring lower seat are both T-shaped in design, and the small end surfaces of the spring upper seat and the spring lower seat are arranged opposite to each other.

[0008] As a further solution of the utility model: the inner diameter of the spring is larger than the small end diameters of the spring upper seat and the spring lower seat, and the outer diameter of the spring is smaller than the large end diameters of the spring upper seat and the spring lower seat.

[0009] As a further solution of the utility model: two load-bearing wheels are installed on the frame.

[0010] As a further solution of the utility model: the driving part includes a driving wheel, and the driving wheel is connected to the driving axle through a gear box.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1. Through the setting of the auxiliary part, the spring upper seat overcomes the spring force and moves downward until it contacts the spring lower seat, thereby realizing a rigid connection between the auxiliary wheel and the drive axle. When the vehicle has a tendency to roll over laterally, it can resist the rollover moment and improve the lateral stability of the vehicle.

[0013] 2. By setting the drive wheel in the middle of the drive axle and rigidly connecting it, and installing auxiliary wheels on the left and right ends of the drive axle, the lateral stability of the vehicle is improved.

[0014] 3. Auxiliary wheels elastically connected to the drive axle are used instead of anti-rollover limit blocks to improve the vehicle's passability. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the bottom of the frame of the utility model;

[0016] Figure 2 It is a schematic diagram of the drive axle system of the utility model;

[0017] Figure 3 It is a schematic diagram of the auxiliary part of the utility model;

[0018] In the figure: 1. frame; 2. drive axle; 3. spring upper seat; 4. spring lower seat; 5. spring; 6. auxiliary wheel; 7. drive wheel; 8. gear box; 9. load-bearing wheel. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figure 1-3 In an embodiment of the utility model, a drive axle system of a sit-on-type reach forklift comprises a frame 1 and a drive axle 2 installed below the frame 1, the drive axle 2 is provided with a drive unit for controlling the frame 1 to complete steering, and the drive axle 2 is also provided with two auxiliary units for preventing the vehicle from lateral tipping; the auxiliary unit comprises a spring upper seat 3 installed on the drive axle 2, a spring lower seat 4 is provided below the spring upper seat 3, the spring upper seat 3 and the spring lower seat 4 are connected by a spring 5, and an auxiliary wheel 6 is provided on the spring lower seat 4.

[0021] Specifically, a driving axle 2 is fixedly mounted on the lower surface of the frame 1, and a driving unit is mounted in the central area of ​​the lower surface of the driving axle 2, so that the frame 1 can be turned conveniently. Secondly, the driving unit is arranged in the middle of the lower surface of the driving axle 2, which can provide better stability for the frame 1. The spring upper seat 3 and the spring lower seat 4 are both T-shaped designs, and the small end faces of the spring upper seat 3 and the spring lower seat 4 are arranged opposite to each other. The two are connected together by a spring 5, and the inner diameter of the spring 5 is larger than the small end face diameters of the spring upper seat 3 and the spring lower seat 4, and the outer diameter of the spring 5 is smaller than the large end face diameters of the spring upper seat 3 and the spring lower seat 4.

[0022] Through the design of the above scheme, the auxiliary wheel 6 and the driving axle 2 are connected by the spring 5, so that the minimum ground clearance of the driving axle is increased, and the passability of the whole vehicle is improved. At the same time, when the vehicle has a tendency to roll over laterally, under the action of the rollover moment, the spring upper seat 3 overcomes the action of the spring force 5 and moves downward until it contacts the spring lower seat 4, so that the auxiliary wheel 6 is rigidly connected to the driving axle 2, the rollover moment is resisted, and the lateral stability of the whole vehicle is improved.

[0023] See also Figure 1 In one embodiment, in this embodiment, preferably, two load-bearing wheels 9 are installed on the frame 1, and further, two load-bearing wheels 9 are fixedly installed on the lower surface of the frame 1, and the bottom surfaces of the two load-bearing wheels 9 are in the same horizontal plane with the bottom surface of the driving wheel 7, and the bottom surface of the auxiliary wheel 6 is also in the same horizontal plane with the bottom surface of the driving wheel 7.

[0024] See also Figure 2 In one embodiment, in this embodiment, preferably, the driving unit includes a driving wheel 7, and the driving wheel 7 is connected to the driving bridge 2 through a gear box 8.

[0025] Although this specification is described according to implementation modes, not every implementation mode includes only one independent technical solution. This description 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 may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0026] Therefore, the above description is only a preferred embodiment of the present application and is not intended to limit the scope of implementation of the present application; that is, all equivalent changes made according to the scope of the claims of the present application are within the protection scope of the claims of the present application.

Claims

1. A drive axle system for a sit-down forward reach forklift, comprising a frame (1) and a drive axle (2) mounted below the frame (1), characterized in that: The drive axle (2) is provided with a drive unit for controlling the vehicle frame (1) to complete steering, and the drive axle (2) is also provided with two auxiliary units for preventing the vehicle from lateral tipping; the auxiliary units include a spring upper seat (3) mounted on the drive axle (2), a spring lower seat (4) is provided below the spring upper seat (3), the spring upper seat (3) and the spring lower seat (4) are connected via a spring (5), and an auxiliary wheel (6) is provided on the spring lower seat (4).

2. The drive axle system of a sit-down reach forklift according to claim 1, characterized in that: The two auxiliary parts are symmetrically distributed on the drive axle (2), and the drive part is located between the two auxiliary parts.

3. The drive axle system of a sit-down reach forklift according to claim 1, characterized in that: The spring upper seat (3) and the spring lower seat (4) are both T-shaped in design, and the small end surfaces of the spring upper seat (3) and the spring lower seat (4) are arranged opposite to each other.

4. The drive axle system of a sit-down reach forklift according to claim 3, characterized in that: The inner diameter of the spring (5) is larger than the small end diameters of the spring upper seat (3) and the spring lower seat (4), and the outer diameter of the spring (5) is smaller than the large end diameters of the spring upper seat (3) and the spring lower seat (4).

5. The drive axle system of a sit-down reach forklift according to claim 1, characterized in that: Two load-bearing wheels (9) are mounted on the vehicle frame (1).

6. The drive axle system of a sit-down reach forklift according to claim 1, characterized in that: The driving part comprises a driving wheel (7), and the driving wheel (7) is connected to the driving axle (2) via a gear box (8).

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