JPH0218972U

JPH0218972U -

Info

Publication number: JPH0218972U
Application number: JP1988097054U
Authority: JP
Priority date: 1988-07-22
Filing date: 1988-07-22
Publication date: 1990-02-08
Anticipated expiration: 2003-07-22
Also published as: JPH0614132Y2

Description

[Brief explanation of drawings]

第１図は、従来のダストシールの略式部分断面
図；第２図は、副リツプを設けた従来のダストシ
ールシールの同じく略式部分断面図；第３図は、
シリンダの内部側に合成ゴム等の弾性材料からな
るシールを備えたシングルリツプタイプのダスト
シールの略式部分断面図；および第４図は、本考
案にかかるダストシールの略式部分断面図である
。１：ハウジング、２：ロツド、３：ダストシー
ル、４：リツプ、５：シール、６：内周リツプ、
７：主リツプ、８：副リツプ、９：空所、１０：
ダストシール、１１：ダストシール本体、１２：
本体基部、１３：第１ダストシールリツプ、１４
：第２ダストシールリツプ、１５：空所、１６：
端部、１７：頂部、１８：内周面、１９：内周面
、２０：外周面、２１：最外部、２２：始点、２
３：流路、２４：環状突起、３１：補強環。 FIG. 1 is a schematic partial cross-sectional view of a conventional dust seal; FIG. 2 is a schematic partial cross-sectional view of a conventional dust seal provided with a sub-lip; FIG.
A schematic partial sectional view of a single lip type dust seal having a seal made of an elastic material such as synthetic rubber on the inside of the cylinder; and FIG. 4 is a schematic partial sectional view of the dust seal according to the present invention. 1: Housing, 2: Rod, 3: Dust seal, 4: Lip, 5: Seal, 6: Inner lip,
7: Main lip, 8: Sub-lip, 9: Blank space, 10:
Dust seal, 11: Dust seal body, 12:
Main body base, 13: first dust seal lip, 14
: 2nd dust seal lip, 15: Blank space, 16:
End, 17: Top, 18: Inner peripheral surface, 19: Inner peripheral surface, 20: Outer peripheral surface, 21: Outermost part, 22: Starting point, 2
3: Channel, 24: Annular projection, 31: Reinforcement ring.

Claims

[Claims for Utility Model Registration] (1) Dust seal body 11 made of an elastic material such as synthetic rubber or synthetic resin;
A first dust seal lip 13 extending in the axial direction on the inner peripheral side of the first dust seal lip 13; and the proximal end 16 of the first dust seal lip 13 , the outer peripheral surface 20 of the second dust seal lip 14 , and the inner peripheral surface 18 of the first dust seal lip 13 . The tip 17 of the second dust seal lip is composed of a cavity 15 defined by an inner circumferential surface 19 extending in the same direction.
The radial width of the opening of the space 15 between the outer circumferential end 26 and the inner circumferential surface 19 of the second dust seal lip is approximately equal to or larger than the amount of tension α for the rod; A dust seal characterized in that the outermost part 21 of the cavity 15 is located on the inner circumferential side of the starting point 22 of the outer circumferential surface 25 of the first dust seal lip 13. (2) The dust seal according to claim 1, characterized in that a ring-shaped reinforcing ring 31 is inserted at least on the outer peripheral side of the dust seal main body 11.