Mechanical-hydraulic transmission system, mode switching control method thereof and engineering machine
A technology of hydraulic transmission and mode switching, which is applied in the field of hydraulic systems and can solve problems such as mode switching stuck
Active Publication Date: 2021-04-09
WEICHAI POWER CO LTD +1
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Problems solved by technology
[0003] The purpose of the present invention is to provide a mechanical-hydraulic transmission system, its mode switching control method and construction machinery, so as to solve the problem of easy mode switching jamming existing in the prior art
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[0023] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only the parts related to the present invention are shown in the drawings but not all of them.
[0024] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected" and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integrated ; It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary, and it can be the internal communication of two components or the interaction relationship betw...
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The invention relates to the technical field of hydraulic systems, in particular to a mechanical hydraulic transmission system, a mode switching control method of the mechanical hydraulic transmission system and engineering machine.The transmission system comprises two first position sensors, a second position sensor and a main controller; the two first position sensors are used for detecting whether the power input wheel is engaged with the mechanical input wheel or not and whether the power input wheel is engaged with the hydraulic input wheel or not. The two second position sensors are respectively used for detecting whether the power output wheel is meshed with the mechanical output wheel or not and whether the power output wheel is meshed with the hydraulic output wheel or not; the first position sensor and the second position sensor are both in communication connection with the main controller, and the main controller is in control connection with the hydraulic pump. Whether system mode switching succeeds or not can be judged through the first position sensor and the second position sensor; and when the gear is stuck, the hydraulic pump can be subjected to unauthorized control, so that the problem that the gear is stuck is solved.
Description
technical field [0001] The invention relates to the technical field of hydraulic systems, in particular to a mechanical-hydraulic transmission system, its mode switching control method and engineering machinery. Background technique [0002] Hydraulic transmission has the advantages of convenient layout, high power density, output torque and speed are not affected by input speed, easy to realize stepless speed regulation and automatic control, etc., but at the same time, it has disadvantages such as low transmission efficiency. Especially in high-speed and low-speed transmission conditions, the problem of low transmission efficiency is more prominent. Gear mechanical transmission has the advantages of accurate and reliable transmission motion, constant instantaneous transmission ratio, compact structure, large transmission ratio, large transmission power, and high transmission efficiency, but it is difficult to realize automatic transmission and even more difficult to realiz...
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IPC IPC(8): B60K6/08B60K17/04B60K17/10
CPCB60K6/08B60K17/04B60K17/105
Inventor 张西田赵金光乔志刚董兆胜
Owner WEICHAI POWER CO LTD