Engineering machine and travelling driving system thereof

A walking drive system and construction machinery technology, applied in mechanical equipment, fluid pressure actuators, servo motors, etc., can solve the problems of low cost, unavailability of reliability, etc., achieve large driving force, improve walking efficiency, and output speed low effect

Inactive Publication Date: 2012-10-10
SANY HEAVY EQUIP
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

[0004] For the above-mentioned traveling mechanisms driven by hydraulic motors, the high and low speeds are controlled by changing the displacement of the hydraulic motors, which makes it impossible to use quantitative motors with high reliability and low cost to meet the combined working conditions of low-speed work and high-speed movement.

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  • Engineering machine and travelling driving system thereof
  • Engineering machine and travelling driving system thereof

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Embodiment Construction

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0022] Such as figure 1 As shown, the first embodiment of the construction machinery walking drive system of the present invention includes: a two-position four-way hydraulic control reversing valve 21', a main drive motor 5 and a slave drive motor 6; wherein, the two-position four-way hydraulic control reversing valve 21 'The first working oil port is connected to the oil supply oil circuit and the oil inlet oil circuit of the main drive motor 5, the second workin...

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Abstract

The invention provides an engineering machine and a travelling driving system thereof. The travelling driving system of the engineering machine comprises a reversing valve, a main driving motor and a secondary driving motor, wherein the reversing valve is connected with an oil supply oil way, an oil inlet oil way of the main driving motor and an oil inlet oil way of the secondary driving motor; and the reversing valve is used for dividing hydraulic oil in the oil supply oil way and conveying the hydraulic oil to the oil inlet oil way of the main driving motor and the oil inlet oil way of the secondary driving motor respectively in the first operating state and conveying all hydraulic oil in the oil supply oil way to the oil inlet oil way of the main driving motor in the second operating state. According to the travelling driving system of the engineering machine, the switching of speed gears of the travelling driving system can be realized.

Description

technical field [0001] The invention relates to the field of engineering machinery, in particular to an engineering machinery travel and its driving system. Background technique [0002] When construction machinery is in working condition, it usually adopts low-speed walking drive mode in order to obtain greater walking propulsion. When the equipment needs to change the working site, in order to improve the turnover efficiency of the equipment, the high-speed driving mode is usually adopted. For traveling devices driven by hydraulic motors, in order to obtain high and low speed driving modes, two-speed hydraulic motors are usually used, that is, hydraulic motors have two working states of large displacement and small displacement. When the hydraulic motor has a large displacement, the driving force of the hydraulic motor is large and the walking speed is low, which is suitable for the working conditions where the equipment requires a large driving force. When the hydraulic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60K17/10F15B11/16F15B13/02
Inventor 陈锷闫炳雷杨文林赵中奇张宇
Owner SANY HEAVY EQUIP
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