JPH0471872U

JPH0471872U -

Info

Publication number: JPH0471872U
Application number: JP11395390U
Authority: JP
Priority date: 1990-10-30
Filing date: 1990-10-30
Publication date: 1992-06-25

Description

[Brief explanation of the drawing]

第１図〜第３図は本考案に係る捩りシール構造
の一実施例を示し、第１図は作業機の枢軸ジヨイ
ント部での取着状態を示す断面図、第２図は捩り
シールの側面図、第３図は第２図Ａ−Ａ断面図、
第４図は無限軌道の覆帯を示す部分断面図、第５
図は従来のシール部材を覆帯連結部に取着した第
４図Ｐ部拡大断面図、第６図は油圧式掘削機の概
略側面図、第７図は従来のシール部材を作業機の
枢軸ジヨイント部に取着した第６図のＱ部拡大断
面図、第８図は従来の捩れシールの断面図、第９
図は同捩れシールを構成するデイスクの断面図で
ある。１０……ブーム、１０ａ，ｂ……ブーム基部、
１１……アーム、１１ａ……アーム基部、Ｑ……
枢軸ジヨイント部、１２ａ，ｂ，ｃ……軸孔、１
４……軸ピン、１５……ブツシユ、１５ａ……ブ
ツシユ端面、Ｓ_４……捩りシール、２４……環状
中空部、２５……外筒、２６……内筒、２７……
外周面部、２８……内周面部、２９……中空部、
３０……弾性体、３１……内壁面、３２……外壁
面、３３……円筒体、３４，３５……スリツト、
３０_１〜５……弾性体パーツ、３１，３２……突
面部。 Figures 1 to 3 show an embodiment of the torsion seal structure according to the present invention. Figure 1 is a sectional view showing how it is attached at the pivot joint of a working machine, and Figure 2 is a side view of the torsion seal. Figure 3 is a sectional view taken along line A-A in Figure 2.
Figure 4 is a partial sectional view showing the cover of the endless track, Figure 5
The figure shows an enlarged sectional view of part P in Fig. 4 showing a conventional sealing member attached to a cover joint, Fig. 6 is a schematic side view of a hydraulic excavator, and Fig. 7 shows a conventional sealing member attached to a pivot shaft of a working machine. Fig. 6 is an enlarged cross-sectional view of the Q section attached to the joint part, Fig. 8 is a cross-sectional view of the conventional twist seal, and Fig. 9 is a cross-sectional view of the conventional twist seal.
The figure is a sectional view of a disk constituting the same twist seal. 10...Boom, 10a,b...Boom base,
11... Arm, 11a... Arm base, Q...
Pivot joint part, 12a, b, c...shaft hole, 1
4... Axis pin, 15... Bush, 15a... Bush end face, S ₄ ... Torsion seal, 24... Annular hollow part, 25... Outer cylinder, 26... Inner cylinder, 27...
Outer peripheral surface part, 28...Inner peripheral surface part, 29...Hollow part,
30...Elastic body, 31...Inner wall surface, 32...Outer wall surface, 33...Cylindrical body, 34, 35...Slit,
30 _1-5 ...Elastic body parts, 31, 32...Protruding surface parts.

Claims

[Scope of utility model registration request]

In a seal member that is interposed between the sliding surfaces of the bush and the shaft pin in the pivot joint of the first and second members that rotate relative to each other, an elastic body is inserted into the hollow parts of the outer cylinder and inner cylinder tube made of metal. A sealing member is fitted, vulcanized and bonded to these inner and outer cylinders, and slits are machined in the radial direction from the outer peripheral surface of the outer cylinder to the elastic body and from the inner peripheral surface of the inner cylinder to the elastic body alternately at predetermined intervals. At the same time, the protrusion formed on the outer peripheral surface of one end of the seal member is press-fitted to the inner peripheral surface of the bush, and the protrusion formed on the inner surface of the other end is press-fitted to the outer peripheral surface of the shaft pin. A torsion seal structure characterized by a torsional action that occurs with rotation.