An electric warehouse forklift

Abstract

The present invention discloses an electric forklift, which includes a front fork, a lifting frame, a steering wheel, a power steering assembly, two front wheels and two rear wheels. A car body frame assembly is provided at the bottom of the vehicle. The car body frame assembly includes two front beams, two rear beams and a cross beam horizontally arranged in the middle. The front ends of the front beams are provided with front wheels on the outer sides. A front wheel axle is arranged on the rear beam. A first driving sprocket is installed on the front wheel. A second driving sprocket is arranged at the outer end of the front wheel axle. The first driving sprocket and the second driving sprocket are connected by a driving chain. A motor and a differential are arranged on the front wheel axle to provide power for driving the front wheels. Its advantages are as follows: The front wheel axle is arranged on the rear beam, and the motor and the differential are designed on the front wheel axle, so that the lifting frame can swing to the inner sides of the two front beams without hitting the differential as in the previous design.

Description

Technical Field

[0001] The present invention relates to an electric vehicle for pushing or stacking objects; specifically, an electric warehouse forklift. Background Art

[0002] A warehouse forklift is a forklift designed for handling goods in a warehouse. It is widely used in the warehousing industry due to its compact body, flexible movement, light self-weight, and good environmental performance. Due to the problem of exhaust emissions, the current trend for small warehouse forklifts is electric drive.

[0003] An axle is provided between the two front wheels of the existing forklift, and a differential is also provided on the axle. Due to the existence of the differential, during design, the lifting frame must be set at a certain distance from the center line of the axle, and this distance is at least the sum of half of the differential and half of the axle diameter. The longer the distance, the heavier the counterweight at the tail is required, the total driving weight increases, and the energy consumption will inevitably increase. Generally, a 1.5-ton forklift needs to be equipped with 700 kilograms of counterweight iron blocks. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the present invention provides an electric warehouse forklift with a center of gravity close to the tires and using a chain to drive the front wheels.

[0005] To solve the above technical problems, the present invention is solved by the following technical solutions: An electric forklift includes a front fork, a lifting frame, a steering wheel, a power steering assembly, two front wheels, and two rear wheels. A car body frame assembly is provided at the bottom of the vehicle. The car body frame assembly includes two front beams, two rear beams, and a cross beam horizontally arranged in the middle. The front wheels are provided on the outer sides of the front ends of the front beams. A front wheel axle is provided on the rear beams. A first driving sprocket is installed on the front wheels. A second driving sprocket is provided at the outer end of the front wheel axle. The first driving sprocket and the second driving sprocket are connected by a driving chain. A motor and a differential are provided on the front wheel axle to provide power for driving the front wheels.

[0006] The front wheels are provided with hubs and rotating shafts. The rotating shafts are provided on the front beams, and the first driving sprocket is provided at the middle position of the rotating shafts.

[0007] Brake pads and brake blocks are provided on the side of the second driving sprocket, and the differential is provided at the middle position of the front wheel axle.

[0008] A first steering sprocket is installed at the lower end of the power steering assembly. A gear steering assembly is provided above the rear wheels. The gear steering assembly includes a second steering sprocket. The first steering sprocket and the second steering sprocket are connected by a steering chain.

[0009] The gear steering assembly further includes a force - transmitting gear, a steering gear, and a transmission rod. The force - transmitting gear is installed on the second steering sprocket and meshes with the steering gear. The transmission rod is arranged below the steering gear and installed on the rear - wheel axle connecting the two rear wheels, enabling the steering of the rear wheels to be consistent with the steering of the steering wheel.

[0010] Above the transmission rod, there is a counterweight box that can be used to hold sediment, stones, etc.

[0011] On the rotating gear, there are limit blocks for restricting the rotation angle.

[0012] Compared with the prior art, the present invention has the following beneficial effects: 1. The front - wheel axle is arranged on the rear beam, and the motor and differential are designed on the front - wheel axle, enabling the lifting frame to swing to the inner sides of the two front beams without hitting the differential as in previous designs. Such a design allows the position of the lifting frame to be advanced at least 15 - 35 cm backward, which is the distance of half a differential. When operating, it can reduce the counterweight, reduce energy consumption, and the turning radius can be reduced by 30 - 60 cm; 2. A power steering assembly is provided, making the steering of the rear wheels consistent with the steering of the steering wheel, which is in line with the usage habits of family cars and is convenient for new operators; 3. The front wheels are driven through a drive chain, and the rear wheels are steered through a steering chain; 4. A counterweight box is provided, which can be filled with sundries such as mud bricks and sand as counterweights, so that the forklift does not need to be equipped with counterweight blocks when leaving the factory, saving costs and energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic structural view of an embodiment of the present invention Figure One 。

[0014] Figure 2 is a schematic structural view of an embodiment of the present invention Figure Two 。

[0015] Figure 3 is a schematic structural view of an embodiment of the present invention Figure Three 。

[0016] Figure 4 is a schematic structural view of an embodiment of the present invention Figure Four 。

[0017] Figure 5 is a schematic structural view of an embodiment of the present invention Figure Five 。 DETAILED DESCRIPTION OF THE INVENTION

[0018] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments: As Figures 1-5As shown in the figure, the markings are as follows: car frame assembly A, gear steering assembly B, front fork 1, lifting frame 2, steering wheel 3, power steering assembly 4, front wheels 5, rear wheels 6, front beam 7, rear beam 8, cross beam 9, first drive sprocket 10, second drive sprocket 11, drive chain 12, motor 13, differential 14, wheel hub 15, rotating shaft 16, brake pads 17, brake blocks 18, first steering sprocket 19, second steering sprocket 20, steering chain 21, force transmission gear 22, steering gear 23, transmission rod 24, counterweight box 25, limit block 26, front wheel axle 27.

[0019] An electric forklift includes a front fork 1, a lifting frame 2, a steering wheel 3, a power steering assembly 4, two front wheels 5 and two rear wheels 6. At the bottom of the vehicle, there is a car frame assembly A, which includes two front beams 7, two rear beams 8 and a cross beam 9 arranged horizontally in the middle. The front ends of the front beams are provided with front wheels on the outer sides, the front wheel axle 27 is arranged on the rear beams, the first drive sprocket 10 is installed on the front wheels, the outer end of the front wheel axle is provided with the second drive sprocket 11, and the first drive sprocket and the second drive sprocket are connected by a drive chain 12. The motor 13 and the differential 14 are arranged on the front wheel axle to provide power for driving the front wheels; the wheel hub 15 and the rotating shaft 16 are arranged on the front wheels, the rotating shaft is arranged on the front beam, and the first drive sprocket is arranged at the middle position of the rotating shaft; the brake pads 17 and the brake blocks 18 are arranged on the side of the second drive sprocket, and the differential is arranged at the middle position of the front wheel axle.

[0020] The lower end of the power steering assembly is installed with the first steering sprocket 19, and a gear steering assembly B is arranged above the rear wheels. The gear steering assembly includes a second steering sprocket 20. The first steering sprocket and the second steering sprocket are connected by a steering chain 21, which can make the steering of the rear wheels consistent with the steering of the steering wheel; the gear steering assembly also includes a force transmission gear 22, a steering gear 23 and a transmission rod 24. The force transmission gear is installed on the second steering sprocket and meshes with the steering gear. The transmission rod is arranged below the steering gear and is installed on the rear wheel axle connecting the two rear wheels.

[0021] Above the transmission rod, there is a counterweight box 25 that can be used to load sediment and stones; the steering gear is provided with a limit block 26 for restricting the rotation angle to prevent steering dead angles.

Claims

1. An electric forklift, comprising a front fork (1), a lifting frame (2), a steering wheel (3), a power steering assembly (4), two front wheels (5) and two rear wheels (6). It is characterized in that: A car body frame assembly (A) is provided at the bottom of the vehicle. The car body frame assembly includes two front beams (7), two rear beams (8) and a cross beam (9) horizontally arranged in the middle. The front wheels are arranged on the outer sides of the front ends of the front beams. A front wheel shaft (27) is provided on the rear beam. A first drive sprocket (10) is installed on the front wheel. A second drive sprocket (11) is provided at the outer end of the front wheel shaft. The first drive sprocket and the second drive sprocket are connected by a drive chain (12). A motor (13) and a differential (14) are provided on the front wheel shaft to provide power for driving the front wheels. A first steering sprocket (19) is installed at the lower end of the power steering assembly. A gear steering assembly (B) is provided above the rear wheels. The gear steering assembly includes a second steering sprocket (20). The first steering sprocket and the second steering sprocket are connected by a steering chain (21). The gear steering assembly further includes a force transmission tooth (22), a steering tooth (23) and a transmission rod (24). The force transmission tooth is installed on the second steering sprocket and meshes with the steering tooth. The transmission rod is provided below the steering tooth. The transmission rod is installed on the rear wheel shaft connecting the two rear wheels, so that the steering of the rear wheels is consistent with the steering of the steering wheel. A counterweight box (25) for loading sand, stones and the like is provided above the transmission rod. A limit block (26) for restricting the rotation angle is provided on the steering tooth to prevent steering dead angles. The front fork is two.

2. An electric forklift according to claim 1, It is characterized in that: A hub (15) and a rotating shaft (16) are provided on the front wheel. The rotating shaft is provided on the front beam. The first drive sprocket is provided at the middle position of the rotating shaft.

3. An electric forklift according to claim 2, It is characterized in that: A brake pad (17) and a brake block (18) are provided on the side of the second drive sprocket. The differential is provided at the middle position of the front wheel shaft.

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