Power-driven hydraulic jack provided with load power-off protective device
A technology of power-off protection device and hydraulic jack, which is applied in the direction of hoisting device, safety device of lifting equipment, etc., and can solve problems such as no anti-overload protection device and product damage
Active Publication Date: 2012-11-28
XINLEI COMPRESSOR CO LTD
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Problems solved by technology
[0006] The product of the above patent is not equipped with an anti-overload protection device, so if an overload occurs, it will cause product damage
Method used
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Embodiment Construction
[0014] The structure of the present invention will be described in detail below with reference to the accompanying drawings.
[0015] like figure 1 Shown is an electro-hydraulic jack with a load power-off protection device, the jack includes a hydraulic jacking device 1, an oil tank 4, a motor 6, an oil pump 5 and a control valve 3, and the hydraulic jacking device 1 is connected to the control valve through the oil circuit 2 3, the control valve 3 is connected to the oil pump 5, the oil pump 5 is connected to the oil tank 4, the oil circuit 2 is provided with a load cut-off protection device 7, and the load cut-off protection device 7 is composed of a touch switch 8 and a hydraulic trigger, The touch switch 8 is actuated to control the power off of the motor 4 .
[0016] like figure 2 As shown, the hydraulic trigger is composed of a trigger valve body 71, a trigger rod 73 and a pressure regulating plug 74. The inner wall of the trigger valve body 71 is provided with an ann...
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The invention relates to a power-driven hydraulic jack. The power-driven hydraulic jack comprises a control valve, the control valve comprises a valve seat, a valve body, an electromagnetic coil and a valve core, the cavity of the valve body is composed of an oil chamber and a magnetic core cavity, the bottom of the oil chamber is provided with a convex oil inlet, the exterior of the oil inlet isconnected with an oil pump, the oil pump is connected with an oil tank, the upper part of the magnetic core cavity is provided with an oil outlet, the interior of the oil outlet is connected with an oil cavity, and the exterior of the oil outlet is connected with a hydraulic jacking device; the valve core is arranged in the valve body, the upper part of the valve core is a magnetic core, the electromagnetic coil is arranged outside the valve body and is matched with the magnetic core, the lower part of the valve core is provided with an annular boss, a first spring is arranged between the annular boss and the magnetic core cavity, the bottom of the magnetic core is provided with a sealing gasket, and the sealing gasket is over against the oil inlet for sealing the oil inlet when the motoris powered off. In the invention, the operation of the power-driven hydraulic jack is controlled by virtue of electromagnetic control, and the whole oil circuit is convenient to design, thus the structure of the product is simpler and the production cost is saved.
Description
technical field [0001] The invention relates to an electro-hydraulic jack, in particular to an electro-hydraulic jack with a load power-off protection device. Background technique [0002] The jack used in the car generally adopts a hydraulic structure, and the lifting device of the jack is raised by manually controlling the hydraulic oil. There have been electro-hydraulic jacks that use vehicle power sockets to draw power. [0003] For example, Chinese utility model patent (application number: 200620107377.8 application date: 2006-09-04) discloses an electric hydraulic jack for vehicles. The jack includes a motor connected to an oil source tank and the oil source tank, and an oil pump driven by the motor. and an oil cylinder with a piston rod, a one-way controllable valve is arranged between the oil pump and the oil cylinder, and a valve cavity is arranged on the one-way controllable valve, and the valve cavity includes an upper valve cavity and a lower valve cavity There...
Claims
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IPC IPC(8): B66F3/42B66F3/44B66F17/00
Inventor 钟仁志李中权林晓健
Owner XINLEI COMPRESSOR CO LTD