A load holding valve for oil cylinder of engineering machinery
A technology for load holding valves and construction machinery, which is applied in the direction of mechanical equipment, servo motor components, fluid pressure actuators, etc. It can solve the problems of increased opening and closing times of the valve core, shortened service life, and large installation space, etc., to achieve reduction Effects of wear and impact collision damage, reduction of one collision, and reduction of installation space requirements
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[0024] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0025] Such as Figure 1-5 Shown is a preferred embodiment of the present invention.
[0026] A load holding valve for construction machinery oil cylinder, comprising
[0027] The valve sleeve 2 is provided with a valve sleeve through hole extending axially through the valve sleeve 2, and the valve sleeve through hole includes a first valve sleeve through hole section 201, a second valve sleeve through hole section 202 and a second valve sleeve through hole section from top to bottom. Three valve sleeve through-hole sections 203, the side wall of the valve sleeve 2 is provided with a control oil port X communicating with the first valve sleeve through-hole section 201 and a first oil port communicating with the third valve sleeve through-hole section 203 A, the lower opening of the through hole section 203 of the third valve sleeve constitut...
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