Variable damping oil-gas suspension cylinder and mining dump truck thereof
A damping and oil-gas technology, applied in the direction of springs, shock absorbers, spring/shock absorbers, etc., can solve the problems of difficult variable damping control and the inability to arrange external damping pipelines, etc., to achieve good sealing and lubrication, high reliability, The effect of improving shock absorption performance
Inactive Publication Date: 2014-12-03
SANY HEAVY EQUIP
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Problems solved by technology
For the inverted suspension cylinder, since the seal is always soaked in oil, although it is well lubricated and has a long service life, it is difficult to implement variable damping control due to structural limitations.
Method used
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Embodiment
[0024] This embodiment provides a mining dump truck, which includes such as figure 1 The variable damping hydropneumatic suspension shown.
[0025] figure 1 The variable damping oil-pneumatic suspension cylinder includes: cylinder 1, piston 2, piston rod 3, guide sleeve 4, and sealing support 5.
[0026] The cylinder 1 is turned upside down, the piston 2 slides and fits with the inner wall of the cylinder 1, the piston rod 3 pushes the piston 2 to slide up and down along the cylinder 1; the guide sleeve 4 is installed at the lower end of the cylinder 1 and is movably connected with the piston rod 3, and the sealing support 5 is arranged between the piston rod 3 and the guide sleeve 4. The piston 2 and the piston rod 3 are tightly connected by screws. The guide sleeve 4 and the cylinder 1 are also tightly connected by screws.
[0027] An air chamber A is formed between the piston 2 and the cylinder barrel 1, and the air chamber A is filled with nitrogen. A main oil chamber...
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The invention discloses a variable damping oil-gas suspension cylinder and a mining dump truck thereof. The variable damping oil-gas suspension cylinder comprises an inverted cylinder barrel, a piston, a piston rod, a guide sleeve and a seal support, wherein the piston is in sliding fit with the inner side wall of the cylinder barrel; the piston rod pushes the piston to vertically slide along the cylinder barrel; the guide sleeve is mounted at the lower end of the cylinder barrel and movably connected with the piston rod; the seal support is arranged between the piston rod and the guide sleeve; a gas chamber is formed between the piston and the cylinder barrel, a main oil chamber communicated with the gas chamber is formed between the piston and the piston rod, and an auxiliary oil chamber is formed between the piston rod and the cylinder barrel; and a plurality of damping holes are formed in the side wall of the piston rod in the axial direction and communicated with the main oil chamber and the auxiliary oil chamber. The provided variable damping oil-gas suspension cylinder keeps advantages of high reliability and good sealing and lubricating property of the inverted cylinder, achieves the variable damping function and greatly improves the damping performance of the suspension cylinder.
Description
technical field [0001] The invention relates to a suspension cylinder, in particular to a variable damping oil-pneumatic suspension cylinder and a mine dump truck. Background technique [0002] The oil-pneumatic suspension cylinder is a shock absorber widely used in mining dump trucks. It has the characteristics of good shock absorption performance, compact structure, high reliability and self-adaptive stiffness. The suspension cylinder of mining dump truck mainly realizes the function of cushioning and shock absorption through damping holes and check valves. During the compression stroke, the one-way valve and the damping hole are opened at the same time, and the oil quickly flows from the inner cavity of the piston rod to the annular cavity between the piston rod and the cylinder wall, and the suspension cylinder is rapidly compressed to absorb the impact energy; the rebound (elongation) stroke When the one-way valve is closed, the oil can only flow back through the dampi...
Claims
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IPC IPC(8): F16F9/32
Inventor 林魁彭威波蒋跃辉
Owner SANY HEAVY EQUIP