JPS6212932Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a dust seal device. The present invention will be explained based on the embodiment shown in the drawings. 1 is a crankshaft, 2 is a crankshaft gear that drives various auxiliary equipment, 3 is a rotary disk fitted to the crankshaft 1, 4 is a flywheel, 5 is a housing for the flywheel 4; 6 is a retainer attached to the housing 5 via bolts 7 to support the seal ring member 8; 9 is a rolling interposed between the housing 5 and the retainer 6. . Said seal ring member 8
The lip portion 10 is brought into elastic contact with an oil draining groove cut on the outer surface 3 of the rotary disk 3', and the oil draining groove is formed into a spiral shape by lathe machining. Due to the pump action that occurs between the rotary disk 3 and the seal ring member when the engine rotates, oil leaking outside through the rotary disk is forcibly returned to the inside of the engine. Reference numeral 11 denotes a ring-shaped dust seal member made of felt material and having an L-shaped cross section, which is attached to the outer wall of the retainer 6, and includes a first side fixed to the retainer 6 and extending toward the rotating shaft 1; and a second side extending along the axis of rotation, the thickness of the second side in the direction perpendicular to the axis of rotation is greater than the thickness of the first side in the direction of the axis of rotation, and the second side has an inner periphery. The surface is in sliding contact with the rotating shaft 1. Note that 13 is a core metal.

Since this embodiment has the above configuration, the retainer 6
Even if dust such as dust tries to enter the gap 12 between the retainer and the rotating shaft 1 from the external space between the flywheel 4 and the flywheel 4, the dust seal member 11 prevents the dust from entering the gap 12. Furthermore, since wear caused by the seal ring member 8 of the rotary disk 3 can be avoided, there is an effect that lubricating oil will not leak from the inside of the engine to the outside. In addition, since the dust seal member 12 is made of felt material, it has excellent durability without deterioration due to the heat of sliding with the rotating shaft 1, and since it has air permeability itself, The dust seal member 1 has good air circulation between the dust seal member 1 and the pressure difference.
It has an excellent effect of preventing the deformation of 1.

[Brief explanation of the drawing]

The drawing is a sectional view of an embodiment of the present invention. 1: Rotating shaft, 3: Rotating disk, 8: Seal ring member, 11: Dust seal member.

Claims (1)

[Scope of utility model registration request] A retainer carrying a seal ring that performs a pumping action by being in elastic contact with the side surface of a rotating disk fitted to a rotating shaft, a first side extending from the retainer toward the rotating shaft, and a first side extending from the first side to the rotating shaft. and a second side whose inner periphery is in contact with the rotation axis and whose thickness in the direction perpendicular to the rotation axis is larger than the thickness of the first side in the rotation axis direction, and is made of felt material. A dust seal device characterized in that it is provided with a formed dust seal member.