Hydraulic shock absorber
A technology of hydraulic buffer and cylinder body, which is applied in the field of hydraulic buffer, can solve the problems of complex shape, large size and weight, deformation of cylinder body, etc., and achieve the effect of solving deformation problems
Inactive Publication Date: 2005-10-05
HITACHI LTD
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Problems solved by technology
Since the spring seat of the shock absorber described in Patent Document 1 has a shape extending from the rod protruding end of the cylinder part to the spring support part for supporting the spring, the size and weight of the parts become large.
In addition, since the shock absorber described in Patent Document 2 has complicated shapes of the protrusions and openings for engagement, processing is complicated, and deformation of the cylinder block becomes a problem when used in a single-cylinder hydraulic shock absorber.
Method used
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Embodiment Construction
[0030] Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
[0031] Such as figure 1 and figure 2 As shown, the hydraulic shock absorber 1 of the first embodiment is a single-cylinder hydraulic shock absorber, and a guide rod 3 and an oil seal 4 are installed on the opening of a bottomed cylindrical cylinder 2 (cylinder part). A free piston 5 is slidably fitted on the bottom side inside the cylinder 2 . The cylinder body 2 is divided into a gas chamber 6 on the bottom side and an oil chamber 7 on the other end side by a free piston 5 , and high-pressure gas is sealed in the gas chamber 6 , and oil is sealed in the oil chamber 7 .
[0032] A piston 8 is slidably embedded in the oil chamber 7 of the cylinder 2, and the oil chamber 7 is divided into two chambers, a cylinder upper chamber 7A and a cylinder lower chamber 7B, by the piston 8 . In the piston 8, one end of the piston rod 9 is connected with a nut 10, ...
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The purpose of this invention is to dispense with welding and suppress deformation of a cylinder to the minimum when mounting a spring seat on the cylinder in a single cylinder type hydraulic shock absorber. Four projecting parts 19 are formed along the peripheral direction in a non-slide region A of a piston 8 in the cylinder 2, and these four projecting parts 19 are arranged in two rows along the axial direction. The annular spring seat 17 is pressed into a top part of the projecting part 19, and a step part 22 is abutted on the projecting part to fix the spring seat 17 on the cylinder 2. Consequently, the spring seat 17 can be attached to the cylinder 2 without welding. A plurality of projecting parts 19 are formed along the peripheral direction of the cylinder 2 to suppress deformation of the cylinder 2 by machining the projecting parts 19. By arranging the projecting parts 19 in two rows along the axial direction, moment load acting on the spring seat 17 is efficiently supported.
Description
technical field [0001] The invention relates to an oil pressure buffer equipped with a spring seat. Background technique [0002] Among the hydraulic shock absorbers mounted on the suspension of automobiles, some spring seats for receiving the suspension springs are installed on the outer periphery of the cylinder body. Now the spring seat of this oil pressure buffer is directly welded and fixed on the outer peripheral part of the cylinder part. However, when the spring seat is directly welded to the cylinder, there are problems of contamination during welding and deformation of the cylinder due to heat or the like. In particular, in the case of a single-cylinder type hydraulic shock absorber, since the spring seat is directly welded to the outer peripheral portion of the cylinder body where the piston slides, these effects are large and pose a problem. [0003] Therefore, the shock absorber described in Patent Document 1 is formed by forming the spring seat into a substan...
Claims
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IPC IPC(8): F16F9/19B60G15/06F16F7/00F16F9/32
CPCF16F9/3235B60G15/063B60G2202/312B60G2204/1242B60G2204/44B60G2206/8209B60G2206/91
Inventor 西村诚
Owner HITACHI LTD