Shuttle valve with middle position unloading function and braking system for hydraulic motor drive

A hydraulic motor and brake system technology, applied in the direction of servo motors, servo motor components, fluid pressure actuators, etc., can solve the problems of brake failure and high oil return back pressure in the hydraulic system, so as to overcome the failure of normal braking movement, to ensure normal operation, and to ensure the effect of accurate reset

Active Publication Date: 2016-10-12
安徽环球传动科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the problem that the brake cannot brake normally due to the high oil return back pressure of the hydraulic system when the existing hydraulic motor is driven by a gear, and provides a shuttle valve with a neutral unloading function And brake system for hydraulic motor drive

Method used

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  • Shuttle valve with middle position unloading function and braking system for hydraulic motor drive
  • Shuttle valve with middle position unloading function and braking system for hydraulic motor drive
  • Shuttle valve with middle position unloading function and braking system for hydraulic motor drive

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Effect test

Embodiment 1

[0033] Such as figure 1 , figure 2 As shown, a shuttle valve with a neutral unloading function in this embodiment includes a valve body 1 and a valve core 2. The valve body 1 is provided with a valve cavity inside, and the valve core 2 is located inside the valve cavity and can move along the valve body. The cavity moves left and right; the left and right ends of the valve cavity communicate with the first oil inlet A1 and the second oil inlet B1 respectively through the oil inlet, the above oil inlet is vertically arranged with the valve cavity, and the valve cavity The top of the tank is connected with the oil outlet C through the oil outlet, and the oil outlet C is connected with the brake acting on the hydraulic motor through the pipeline. In this embodiment, the bottom of the valve cavity is provided with an oil return passage 6, and the middle part of the valve core 2 is processed with a stepped groove 201 (that is, the valve core 2 is processed into a stepped cylindri...

Embodiment 2

[0036] Such as Figure 1-3 As shown, a shuttle valve with a neutral unloading function in this embodiment includes a valve body 1 and a valve core 2. The valve body 1 is provided with a valve cavity inside, and the valve core 2 is located inside the valve cavity and can move along the valve body. The cavity moves left and right; the left and right ends of the valve cavity communicate with the first oil inlet A1 and the second oil inlet B1 respectively through the oil inlet, and the above oil inlet and the valve cavity are vertically arranged, so that on the one hand it can Oil can be fed into the valve chamber of the shuttle valve through the first oil inlet A1 and the second oil inlet B1; Oil ports A2 and B2 enter oil. The top of the valve cavity communicates with the oil outlet C through the oil outlet, and the oil outlet C is connected with the brake acting on the hydraulic motor through the pipeline. In this embodiment, the bottom of the valve cavity is provided with an ...

Embodiment 3

[0045] A rotary drive system of a log grab in this embodiment includes a hydraulic motor 7 and a gear transmission mechanism, and the hydraulic motor 7 drives the gear transmission mechanism to rotate, thereby driving the grab bucket to rotate. The rotary drive system of this embodiment also includes the embodiment 2 hydraulic motor braking system.

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Abstract

The invention discloses a shuttle valve with a middle position unloading function and a braking system for a hydraulic motor drive, and belongs to the technical field of hydraulic motor drive braking. The top of a valve chamber of the shuttle valve is communicated with a third oil outlet through an oil outlet channel, the bottom of the valve chamber is provided with an oil return channel, a through hole distributed in the vertical direction is formed in a valve element, the left end and the right end of the valve element are each provided with an elasticity reset device, and when a hydraulic system stops supplying oil, the valve element is forced by the elasticity reset devices to reset, so that the oil outlet channel, the through hole and the oil return channel are communicated to form an unloading channel of the shuttle valve. The braking system for the hydraulic motor drive comprises a brake acting on a hydraulic motor and the shuttle valve; the third oil outlet of the shuttle valve is connected with a hydraulic interface of the brake through a pipeline, and any one of shuttle valves is adopted as the shuttle valve. Accordingly, the shuttle valve can relieve pressure as required, therefore, normal braking of the brake can be guaranteed, and then the hydraulic motor gear drive works normally.

Description

technical field [0001] The invention belongs to the technical field of hydraulic motor-driven braking, and more specifically relates to a shuttle valve with a neutral unloading function and a hydraulic motor-driven braking system. Background technique [0002] With the rapid development of the economy, sawmills and related factories mainly use wood grabbers to transport wood. Wood grabbers are important mechanical equipment in wood loaders. The performance of wood grabbers directly affects the work efficiency of wood grabbing. . The existing wood grab mainly includes two kinds of mechanical structure and hydraulic type. The mechanical type is driven by the mechanical transmission between the parts to close or open the wood grab. Thereby controlling the movement of the wood grab and greatly reducing the transmission of parts. [0003] The hydraulic rotary log grab usually drives the grab bucket to rotate through the rotary drive device during the working process, while the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B13/02F15B11/08F16K11/07
CPCF15B11/08F15B13/021F16K11/07
Inventor 谷从余
Owner 安徽环球传动科技有限公司
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