Service Brake Protection Valves and Work Vehicles

A brake protection valve and service braking technology, which is applied in the field of vehicles, can solve the problems such as the difficulty of ensuring the consistency of the rollover model and the calculation results, the difficulty in detecting key parameters, and the difficulty in implementation, so as to achieve easy structure and control process, and avoid rollover. Accident, pressure output softening effect

Active Publication Date: 2018-10-02
XUZHOU HEAVY MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 1. Difficulty in implementation: It is difficult to detect key parameters in the existing technology, and it is difficult to ensure consistency between the tipping model and calculation results
[0007] 2. High cost: It is necessary to add a proportional pressure reducing valve and related detection components to the brake circuit, and the cost is high

Method used

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  • Service Brake Protection Valves and Work Vehicles
  • Service Brake Protection Valves and Work Vehicles
  • Service Brake Protection Valves and Work Vehicles

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0043] figure 1 It is a schematic diagram of the principle of the service brake protection valve of the first embodiment of the present invention.

[0044] Such as figure 1 As shown, the service brake protection valve 100 of the first embodiment has a first connection port A, a second connection port B and includes a switching module and a pressure limiting module. Wherein the first connection port A is used to connect with the service brake valve of the service brake system of the working vehicle, and the second connection port B is used to connect with the brake cylinder of the service brake system. Wherein, the switching module can control the service brake protection valve to switch between the first working mode and the second working mode. In the first working mode, the first connection port A communicates with the second connection port B through the switching module. In the second working mode, the first connection port A communicates with the second connection port...

no. 2 example

[0070] Figure 4 It is a schematic diagram of the principle of the service brake protection valve of the second embodiment of the present invention.

[0071] The difference between the service brake control valve of the second embodiment and the first embodiment is that in the second embodiment, the pressure limiting element of the pressure limiting sub-module is not a throttling device, but a pressure reducing device.

[0072] Such as Figure 4 As shown, the service brake control valve 200 of the second embodiment has a first connection port C and a second connection port D, the first connection port C is used to connect with the service brake valve, and the second connection port D is used to connect with the brake valve. Cylinder connection. The service brake valve protection valve 200 includes a switching module and a pressure limiting module. The switching module and the pressure limiting module are arranged in parallel. The switching module includes a reversing valve...

no. 3 example

[0079] Figure 5 It is a schematic diagram of the principle of the service brake protection valve of the third embodiment of the present invention.

[0080] Such as Figure 5 As shown, the service brake protection valve 300 of the third embodiment has a first connection port E, a second connection port F and includes a switching module M1 and a pressure limiting module M2. Wherein the first connection port E is used to connect with the service brake valve of the service brake system of the working vehicle, and the second connection port F is used to connect with the brake cylinder of the service brake system. Wherein, the switching module M1 can control the service brake protection valve 300 to switch between the first working mode and the second working mode. In the first working mode, the first connecting port E communicates with the second connecting port F through the switching module M1, and in the second working mode, the first connecting port E communicates with the s...

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Abstract

The invention discloses a service brake protection valve and a working vehicle. The service brake protection valve has a first connection port for connecting with the service brake valve and a second connection port for connection with the brake cylinder. The service brake protection valve includes a switching module and a pressure limiting module. The switching module is used for Control the service brake protection valve to switch between the first working mode and the second working mode. In the first working mode, the first connecting port communicates with the second connecting port through the switching module. In the second working mode, the first connecting port It communicates with the second connection port through the pressure limiting module. The service brake protection valve controls whether the service brake protection valve protects the service brake system through the switching module. Switching to the first working mode of the service brake protection valve has basically no effect on the function of the service brake system. Switching to the second In the working mode, the pressure limiting module can prevent or avoid the overturning accident caused by sudden stepping on the brakes, and its structure and control process are easy to realize.

Description

technical field [0001] The invention relates to the field of vehicles, in particular to a service brake protection valve and a working vehicle. Background technique [0002] Work vehicles that can carry heavy loads have high requirements for stability, and may cause overturning accidents during the process of driving with a load. [0003] Take the container empty container stacker as an example, it is used in the port terminal, its special gantry structure can lift the container to more than ten meters, so it has high requirements on its stability, and because it is often in a high-frequency operation state, It is prone to misoperation, so tipping accidents may occur during use, especially when driving with a load. For example, when the spreader is at a high position during driving, if the brake is too fast, a tipping accident may easily occur. [0004] In the prior art, the anti-tipping protection measure of the empty container stacker is to install a proportional pressur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60T15/02
CPCB60T15/028
Inventor 叶海翔张付义张德荣张震孙飞
Owner XUZHOU HEAVY MASCH CO LTD
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