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Automatic control variable damping oil-gas suspension cylinder

A technology of oil and gas suspension and variable damping, applied in springs, shock absorbers, springs/shock absorbers, etc., can solve problems such as high damping and low damping

Inactive Publication Date: 2014-03-19
INNER MONGOLIA NORTH HAULER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In order to make the vehicle have good driving comfort and handling stability, the stroke and stiffness of the suspension cylinder are small when the vehicle is empty, and low damping is required; while when the vehicle is fully loaded, the stroke and stiffness of the suspension cylinder are large, Higher damping is required; however, the damping of the oil-pneumatic suspension cylinders of traditional non-road mining dump trucks currently sold and used on the market is determined and unchanged, and its size is determined by the form, diameter and number of damping holes on the piston rod. Determined; the traditional fixed damping oil-pneumatic suspension cylinder cannot meet the different damping requirements of the car when it is unloaded and fully loaded

Method used

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Embodiment Construction

[0010] The piston rod 1 of the present invention is covered with a piston 4, the upper part of the piston 4 is equipped with hydraulic oil 5, and the oil layer of the hydraulic oil 5 is filled with dry nitrogen 6, and the piston 4, the inner wall of the cylinder barrel 2 and the outer wall of the piston rod 1 form a ring The space is called the internal buffer chamber, which is also filled with hydraulic oil 5, and the piston rod 1 is provided with a plurality of radially fixed damping holes 7, and a check valve 3 is installed in two of the symmetrical fixed value damping holes 7 . The cylinder 2 is provided with an upper oil hole and a lower oil hole, the upper oil hole communicates with the hydraulic oil on the upper part of the piston 4, the lower oil hole communicates with the internal buffer chamber, the upper oil hole and the lower oil hole are connected through an external oil passage 11, and the outer The oil passage 11 is provided with an adjustable orifice 10 and a s...

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Abstract

The invention relates to an automatic control variable damping oil-gas suspension cylinder, and belongs to the field of off-highway mining dumping trucks. A cylinder barrel is provided with an upper oil hole and a lower oil hole, the upper oil hole is communicated with piston upper hydraulic oil, the lower oil hole is communicated with an internal buffering cavity, the upper oil hole and the lower oil hole are connected through an externally-arranged oil channel, and an adjustable throttling hole and a solenoid valve are arranged on the externally-arranged oil channel. The externally-arranged oil channel, the adjustable throttling hole and the solenoid valve define an external buffering cavity in the traveling range of a piston rod, the solenoid valve is connected with a pressure switch, and the pressure switch is connected with high-pressure nitrogen inside the suspension cylinder. According to the automatic control variable damping oil-gas suspension cylinder, the external buffering cavity is controlled to be opened and closed under different working conditions through the pressure switch, the changes of the damping of the suspension cylinder under different working conditions are achieved, and thus optimal traveling smoothness and handling stability can be achieved.

Description

Technical field: [0001] The invention relates to an automatically controlled variable damping oil-gas suspension cylinder, which belongs to the field of non-highway mining dump trucks. Background technique [0002] In order to make the vehicle have good driving comfort and handling stability, the stroke and stiffness of the suspension cylinder are small when the vehicle is empty, and low damping is required; while when the vehicle is fully loaded, the stroke and stiffness of the suspension cylinder are large, Higher damping is required; however, the damping of the oil-pneumatic suspension cylinders of traditional non-road mining dump trucks currently sold and used in the market is determined and unchanged, and its size is determined by the form, diameter and number of damping holes on the piston rod. Determined; the traditional fixed damping oil-pneumatic suspension cylinder cannot meet the different damping requirements of the car when it is no-load and full-load. Content...

Claims

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Application Information

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IPC IPC(8): F16F9/512
Inventor 王晓磊狄志红宋晗孟有平孙明达王怡然张波李晓娇李来平高利军王逢全孔令新张强贾占军
Owner INNER MONGOLIA NORTH HAULER
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