A kind of buffer device for piston self-adaptive lubrication telescopic hydraulic cylinder
A telescopic hydraulic cylinder and buffer device technology, applied in the field of hydraulic cylinders, can solve the problems of piston rod damage, telescopic oil cylinder damage, etc., and achieve the effects of improving reliability, throttling and buffering to slow down the running speed, and strong adaptability
Active Publication Date: 2022-07-01
XCMG HYDRAULICS CO LTD
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Problems solved by technology
[0007] In order to meet the development trend of cranes with large flow and high load, improve the hoisting weight and load efficiency, and solve the problems of damage to the seal of the telescopic oil cylinder during high-speed operation and damage to the piston rod and the bottom of the cylinder, the invention provides a piston Buffer device for self-adaptive lubrication telescopic hydraulic cylinder to improve system reliability
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Embodiment Construction
[0022] The following is a specific embodiment of the present invention, and the present invention will now be further described with reference to the accompanying drawings.
[0023] combine Figure 1 to Figure 3 As shown, a buffer device for a piston self-adaptive lubricating telescopic hydraulic cylinder, the left end of the cylinder 4 is formed by welding two cylinders. The gland 1 is installed in the left end of the cylinder barrel 4 through screw connection, and the radial direction between the gland 1 and the cylinder barrel 4 is fastened and fixed by two-way screws. The inner wall of the gland 1 is slidingly matched with the piston rod 5 through the dust ring and the F4 support ring, and the F4 material support ring plays a conductive role. The left side of the guide sleeve 2 is in contact with the gland 1 in the axial direction, and the right side of the guide sleeve 2 is axially in front of the front spacer 3 to play a fixed and limiting role. The inner wall of the g...
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The invention discloses a buffer device for a piston self-adaptive lubrication telescopic hydraulic cylinder. The inner end of the piston rod is fixed with a buffer sleeve, and the center of the cylinder bottom is fixed with a buffer structure matched with the buffer sleeve; the inner side of the buffer sleeve has a convex stepped structure, including a first stepped surface and a second stepped surface; the buffer structure is stepped, with There are 3 annular stepped surfaces; the right side of the piston is provided with a baffle set on the inner end of the piston rod; the baffle is provided with a cylindrical hole in the axial direction, and the cylindrical hole is relatively connected to the sealing groove on the piston for installing the Y ring. The invention has the advantages of simple and compact structure, easy processing, etc. The buffer device is used to buffer the impact of the overpressure at the end of the telescopic oil cylinder stroke and the impact of the cylinder bottom structure, thereby causing the swing impact of the whole vehicle caused by the swing of the boom, and can effectively reduce the boom of the crane. Vehicle shaking caused by swinging. The back pressure caused by the accumulation of hydraulic oil between the Y rings is eliminated, the sealing reliability of the sealing ring is improved, the leakage of the hydraulic cylinder is reduced, and the service life of the hydraulic cylinder is increased.
Description
technical field [0001] The invention relates to the technical field of hydraulic cylinders, in particular to a buffer device for a piston self-adaptive lubrication telescopic hydraulic cylinder. Background technique [0002] At present, the basic means of telescopic boom of medium and small tonnage truck cranes and rough terrain cranes are mainly rope row structures. hoisting function. Due to the development trend of lightweight and intelligent cranes, in order to improve the comfort of the market and the needs of lifting conditions, the output of the hydraulic system of the crane's telescopic boom is large. Therefore, during the operation of the telescopic cylinder driving the rope row and the crane telescopic arm, the high-speed and reciprocating operation of the telescopic cylinder piston, the part between the outer side of the piston and the cylinder tube contacting the seal is easy to seep into the oil to generate back pressure, which accelerates the sealing ring. fai...
Claims
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IPC IPC(8): F15B15/14F15B15/22B66C23/693
CPCF15B15/1423F15B15/1457F15B15/1452F15B15/226B66C23/705
Inventor 刘朋彭亮陈登民张虹源翟新颖陈向兵石雨东
Owner XCMG HYDRAULICS CO LTD