Shear-type lifting machine bypass reversing valve unloading loop
A technology of unloading circuit and reversing valve, which is applied in the direction of mechanical equipment, fluid pressure actuators, servo motors, etc. It can solve the problems of affecting the life of hydraulic pumps and motors, frequent start and stop, etc., so as to improve the service life and be easy to manufacture , design reasonable effect
Inactive Publication Date: 2014-12-24
芜湖高昌液压机电技术有限公司
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Problems solved by technology
[0003] Aiming at the problem that the service life of the hydraulic pump and the motor is affected due to the frequent start and stop of the hydraulic pump when the actuator of the existing scissor lift stops working for a short time, the present invention provides a bypass reversing valve unloading of the scissor lift Circuit, through the parallel connection of the reversing valve on the working oil circuit, the unloading of the hydraulic pump is realized, thereby avoiding the frequent start and stop of the hydraulic pump
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Embodiment 1
[0016] Such as figure 1 As shown, the unloading circuit of the bypass reversing valve of the scissor lift includes a fuel tank 1, a hydraulic pump 2, an overflow valve 3, a reversing valve A4, a hydraulic cylinder 5, and a reversing valve B6. The hydraulic pump 2 The inlet oil pipe is connected to the oil tank 1, and the outlet oil pipe is connected to the overflow valve 3, the reversing valve A4, and the reversing valve B6 respectively, and the oil return pipes of the overflow valve 3, the reversing valve A4, and the reversing valve B6 are connected to the oil tank 1 , the hydraulic cylinder 5 is connected to the reversing valve A4.
[0017] The reversing valve A4 is a three-position, four-way electromagnetic reversing valve, and its position function is O-type, and the reversing valve B6 is a two-position, two-way electromagnetic reversing valve, and the overflow valve 3 is Direct acting relief valve.
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The invention discloses a shear-type lifting machine bypass reversing valve unloading loop and belongs to the field of hydraulic transmission. The shear-type lifting machine bypass reversing valve unloading loop comprises an oil tank, a hydraulic pump, an overflow valve, a reversing valve A, a hydraulic cylinder and a reversing valve B, wherein an inlet oil tube of the hydraulic pump is connected with the oil tank, an outlet oil tube of the hydraulic pump is respectively connected with the overflow valve, the reversing valve A and the reversing valve B; oil return tubes of the overflow valve, the reversing valve A and the reversing valve B are connected with the oil tank; the hydraulic cylinder is connected with the reversing valve A. The shear-type lifting machine bypass reversing valve unloading loop is used for solving the problem that the service lives of the hydraulic pump and a motor are influenced by frequent start and stop of the hydraulic pump when an existing shear-type lifting machine executive component stops operation in a short time. The shear-type lifting machine bypass reversing valve unloading loop has the advantages of being simple in structure, reasonable in design and easy to manufacture.
Description
technical field [0001] The invention belongs to the field of hydraulic transmission, and more specifically relates to an unloading circuit of a lift hydraulic system. Background technique [0002] With the continuous development of the automobile industry, automobile repair and maintenance has gradually become a new industry. Among them, the lift, as an important tool in the process of car repair and maintenance, has also developed rapidly. The lift is mainly to raise the car from a safe height to another safe height, so as to facilitate manual operation and maintenance. At present, there are many types of lifts, which can be divided into mechanical transmission and hydraulic transmission according to the transmission mode. The mechanical transmission structure is simple and the price is cheap, but the lifting weight is limited, and the lead screw or working nut is prone to slipping, which poses a great safety hazard. The hydraulic transmission lift has good safety perfor...
Claims
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IPC IPC(8): F15B13/02F15B11/02
Inventor 高昌六
Owner 芜湖高昌液压机电技术有限公司