JPS6136825Y2 - - Google Patents

Description

[Detailed description of the invention] The conventional oil damper achieves the above-mentioned effect by sequentially fitting a rod guide and an oil seal to the end of the cylinder, and then fitting a seat plate to the outside of the rod guide and bending the cylinder edge inward. It had a structure that fixed the rod guide and oil seal. That is, since a seat plate is required for fixing, the number of parts is large, and the assembly process is also complicated. Moreover, since the seat plate is superimposed on the rubber of the oil seal, it is difficult to securely fix the oil seal, and it tends to loosen. The present invention seeks to eliminate these drawbacks.

FIG. 1 is a partially longitudinal side view of an embodiment of the present invention, and FIG. 2 is an enlarged view of a portion of FIG. 1.
That is, an inner cylinder 2 is provided inside an outer cylinder 1 filled with oil, and a piston having an oil hole for generating a damping force is fitted into the inner cylinder. In addition, a rod guide 3 is fitted to the end of the cylinder, and a metal disc 5 with an oil seal 4 attached is placed on the outside of the rod guide 3, and the edge of the cylinder 1 is bent inward. It is in direct contact. The oil seal 4 is made of an elastic material such as rubber, and its inner lip is in sliding contact with the piston rod 6, and is tightened by annular springs 7 and 8. This oil seal 4 is welded to the inner peripheral part of the annular metal disc 5, and an annular packing 9 made of a similar elastic material is welded to the outer peripheral surface of the disc, and the packing 9 is attached to the outer cylinder. It is pressed against the inner surface of 1. Therefore, the end of the cylinder 1 is sealed by the oil seal 4 and the packing 9 welded to the metal disc 5, and as described above, the edge 10 of the cylinder 1 is bent and the outer surface of the disc 5 is sealed. The rod guide 3 and oil seal 4 are fixed to the cylinder by pressing directly.

As described above, in the present invention, the rod guide and oil seal are firmly fixed by bending the edge of the cylinder and bringing it into direct contact with the annular metal disc 5 to which the oil seal is welded. Therefore, there is no need for a seat plate disposed outside the oil seal, which reduces the number of required parts and simplifies assembly. Furthermore, if the total length of the cylinder is constant, there is an effect that the stroke of the piston can be increased.

[Brief explanation of the drawing]

FIG. 1 is a partially longitudinal side view of an embodiment of the present invention, and FIG. 2 is an enlarged view of a portion of FIG. 1.
In the figure, 1 is an outer cylinder, 2 is an inner cylinder, 3 is a rod guide, 4 is an oil seal, 5 is an annular metal disc, 6 is a piston rod,
7 and 8 are springs, 9 is a gasket, and 10 is an edge of the cylinder.

Claims (1)

[Scope of utility model registration request] An oil damper in which an oil seal made of an elastic material, whose inner lip slides against the piston rod, is welded to the inner circumference of an annular metal disk, and an annular packing made of an elastic material that is pressed against the inner surface of a cylinder is welded to the outer circumference of the metal disk, and the metal disk is placed on the outside of a rod guide fitted to the end of the cylinder, and the edge of the cylinder is bent inward to directly contact and press against the outer surface of the metal disk, thereby fixing the oil seal and rod guide to the cylinder.