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Hydraulic braking system of large-tonnage electric fork-lift truck

A hydraulic braking and electric forklift technology, applied in the direction of brakes, braking transmissions, vehicle components, etc., can solve the problems of restricting oil sources and the number of oil pumps, and achieve the effects of accurate and convenient operation, high safety, and convenient installation and maintenance

Inactive Publication Date: 2013-10-23
HANGCHA GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For electric forklifts, due to the limitation of the number of motors, controllers, cost and other factors, the number of oil sources and oil pumps is restricted.

Method used

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  • Hydraulic braking system of large-tonnage electric fork-lift truck

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Embodiment Construction

[0022] Such as figure 1 As shown, in this embodiment, the oil tank 1 and the oil pump 2 of the hydraulic working system are used to provide the service brake, the parking brake, and the oil source of the steering system. The oil outlet of the oil pump 2 is connected with the P1 port (oil inlet) on the oil inlet valve plate of the multi-way reversing valve 3 integrated with the monostable diverter valve. The PF port (oil outlet) of the multi-way reversing valve is connected to the oil inlet port of the pipeline filter 4. The pipeline filter filters the pressure oil to ensure the cleanliness of the pressure oil. There are bypass valves and differential pressure signaling devices. The oil outlet of the pipeline filter 4 is divided into two paths through the front tee 5, one path is connected with the P port (oil inlet) of the parking integrated valve 6, and the other path is divided into two paths through the rear tee 10. A port (oil outlet) on the parking integrated valve...

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Abstract

The invention relates to a hydraulic braking system of a large-tonnage electric fork-lift truck. The invention aims to provide a hydraulic braking system of a large-tonnage electric fork-lift truck, which is simple in structure, safe and reliable. According to the technical scheme of the invention, the hydraulic braking system comprises a parking brake, a power brake valve and a service brake; an oil source is provided for the system by a hydraulic work system; the hydraulic work system comprises an oil tank, an oil pump and a multi-way reversing valve; the hydraulic braking system is characterized by further comprising a parking integrated valve and an energy accumulator; the PF port of the multi-way reversing valve is connected with a pipeline filter; the oil outlet of the pipeline filter is connected with a front tee joint; after flow is divided by the front tee joint, one path is communicated with the P port of the parking integrated valve, and the other path is respectively connected with the P port of the power brake valve and the P port of the energy accumulator; the PA port of the energy accumulator is connected with the PA port of the energy accumulator; the N port of the power brake valve is connected with a steering system; the Br port of the power brake valve is communicated with an oil port of the service brake.

Description

technical field [0001] The invention relates to a hydraulic braking system of a large-tonnage electric forklift. It is suitable for forklift braking field. Background technique [0002] Most existing electric forklifts use shoe brakes. In recent years, domestic electric forklifts using self-cooling wet brakes have developed rapidly. Because the wet brake adopts a multi-disc structure, when the hydraulic oil enters the brake cylinder, the force of the piston pushing the fixed disc and the friction disc is evenly distributed, and the relationship between the hydraulic pressure and the formed braking force is linear, and the braking is rapid and efficient. Smooth, stable braking performance, with high safety. Self-cooling multifunctional wet brakes cool and lubricate the wet brake discs by the lubricating oil lubricating the reducer. The cooling and lubricating oil in the brake discs are separated from the medium of the braking system. Wet brakes can use brake fluid or hydra...

Claims

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Application Information

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IPC IPC(8): B60T13/12B60T13/138
Inventor 汪瑛
Owner HANGCHA GRP
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