Transmission and driving apparatus provided with transmission

Patent metadata

Field	Value
Publication number	US-10837538-B2
Application number	US-201716342851-A
Country	US
Kind code	B2
Filing date	Oct 19, 2017
Priority date	Oct 28, 2016
Publication date	Nov 17, 2020
Grant date	Nov 17, 2020

Abstract

The transmission includes: an open-end cover fitted to an inner circumference of an open end portion of a rotary housing, the cover being configured to close the open end portion; an O-ring provided between the rotary housing and the open-end cover in the compressed state in the axial direction of the rotary housing, the O-ring being configured to seal between the inner circumferential portion of the rotary housing and the outer circumferential portion of the open-end cover; and a snap ring configured to restrict the movement of the open-end cover in the axial direction. The open-end cover is pushed against the snap ring by the repulsive force exerted by the compressed O-ring.

First claim

The invention claimed is:

1. A transmission comprising:
a transmission mechanism configured to change speed of output rotation from a driving source;
a cylinder-shaped rotary housing configured to accommodate the transmission mechanism, the rotary housing being configured to be rotated as the output rotation the speed of which has been changed is transmitted;
a cover fitted to an inner circumference of an open end portion of the rotary housing, the cover being configured to close the open end portion;
a seal member provided between the rotary housing and the cover in a compressed state in an axial direction of the rotary housing, the seal member being configured to seal between an inner circumferential portion of the rotary housing and an outer circumferential portion of the cover; and
a restricting member configured to restrict movement of the cover in the axial direction, wherein
the cover is pushed against the restricting member by a repulsive force exerted by the compressed seal member,
wherein the cover has:
a disc-shaped main body portion; and
a flange part provided between the seal member and the restricting member so as to project from an outer circumferential surface of the main body portion, and

the rotary housing has a sealing face with which the seal member comes into contact, and the seal member is provided between the flange part and the sealing face in a compressed state and wherein
the sealing face is formed by a tapered surface, the sealing face being formed such that a diameter of the sealing face is increased towards an open end.

2. The transmission according to claim 1 , wherein
the cover further has a protruded portion formed so as to project from the outer circumferential surface of the main body portion, the protruded portion being formed so as to be spaced from the flange part, and
the seal member is supported between the flange part and the protruded portion.

3. A driving apparatus comprising the transmission according to claim 1 and the driving source.

4. The transmission according to claim 1 , wherein
the restricting member is configured to be engaged with an annular engaging groove formed in the rotary housing.

5. The transmission according to claim 1 , wherein
the restricting member is configured to cover a gap between the rotary housing and the cover.

6. The transmission according to claim 1 , wherein
an attachment recessed portion having a larger diameter than other parts is formed in an inner circumferential surface of the open end portion of the rotary housing, and
a clearance is provided between an end surface of the cover in the axial direction and a bottom surface of the attachment recessed portion facing the end surface.

Assignees

• Kyb Corp

Inventors

• Suzuki Jun
• Suzuki Kenji

Classifications

• F16H57/031

  characterised by covers or lids for gearboxes · CPC title

• F16J15/06

  with solid packing compressed between sealing surfaces · CPC title

• F16H57/029 Primary

  characterised by means for sealing the gearboxes, e.g. to improve airtightness · CPC title

• F16J15/062

  characterised by the geometry of the seat · CPC title

• F16J13/08 Primary

  attached by one or more members actuated to project behind a part or parts of the frame (similar constructions for doors or windows E05C9/00) · CPC title