Device for press-fitting oil seal

Patent metadata

Field	Value
Publication number	US-10099327-B2
Application number	US-201314423332-A
Country	US
Kind code	B2
Filing date	Jul 12, 2013
Priority date	Aug 28, 2012
Publication date	Oct 16, 2018
Grant date	Oct 16, 2018

Abstract

A device for press-fitting an oil seal S that includes a fixing section F in which a hard ring S is embedded and a lip section L into a structure A. The device includes an air hammer AH that includes a hammer head 1 . The hammer head 1 includes a pressing section 6 configured to abut the fixing section F and a holding section 7 configured to abut the lip section L, and a negative pressure space 8 is formed between the hammer head AH and the oil seal S between the pressing section 6 and the holding section 7 . The hammer head 1 is provided with an air suction path 11 that is open to the negative pressure space 8 at one end and is connected to an air suctioning means 10 at the other end. Accordingly, the device holds by suction the oil seal S having a complicated shape without deforming it, and adequately press-fits it into a structure A.

First claim

The invention claimed is:

1. A device for press-fitting an oil seal into a structure, said oil seal having, over a whole circumference thereof, a fixing section in which a hard ring is embedded and a lip section protruding at either of inner or outer circumferential sides of the fixing section, wherein:
said device comprises
an air hammer that comprises a hammer head configured to carry the oil seal, and
an air hammer mover that moves the air hammer forward and backward along an axis of the air hammer, which is placed such that the hammer head faces downward,

the oil seal has an approximately U-shaped cross-section defined by the fixing section and the lip section,
the hammer head of the air hammer comprises, over the whole circumference of the oil seal, a pressing section configured to abut an upper face of the fixing section of the oil seal and a holding section that protrudes downward and is configured to abut an upper face of the lip section, and a negative pressure space is formed between the hammer head and the oil seal between the pressing section and the holding section,
the hammer head is provided with an air suction path that is open to the negative pressure space at one end and is connected to an air suction at another end,
the air suction is configured to suction and hold the oil seal, such that the oil seal is suctioned and held by forward movement of the hammer head by the air hammer mover, and
the air hammer mover is configured to move forward so as to press-fit the oil seal which is suctioned and held with the hammer head into the structure.

2. The device for press-fitting the oil seal according to claim 1 , wherein
the hammer head comprises a holding member that comprises the holding section and is divided from a head body, and an adjusting member that is interposed between the head body and the holding member, and
the adjusting member is made of a resin that has a hardness lower than a hardness of the holding member.

3. The device for press-fitting the oil seal according to claim 1 , further comprising:
an air hammer driver that moves and holds the air hammer to a setting position of the oil seal and a setting position of the structure.

4. A device for press-fitting an oil seal into a structure, said oil seal having, over a whole circumference thereof, a fixing section in which a hard ring is embedded and a lip section protruding at either of inner or outer circumferential sides of the fixing section, wherein:
said device comprises
an air hammer that comprises a hammer head configured to carry the oil seal, and
an air hammer moving means that moves the air hammer forward and backward along an axis of the air hammer, which is placed such that the hammer head faces downward,

the oil seal has an approximately U-shaped cross-section defined by the fixing section and the lip section,
the hammer head of the air hammer comprises, over the whole circumference of the oil seal, a pressing section configured to abut an upper face of the fixing section of the oil seal and a holding section that protrudes downward and is configured to abut an upper face of the lip section, and a negative pressure space is formed between the hammer head and the oil seal between the pressing section and the holding section,
the hammer head is provided with an air suction path that is open to the negative pressure space at one end and is connected to an air suctioning means at another end,
the air suctioning means suctions and holds the oil seal, such that the oil seal is suctioned and held by forward movement of the hammer head by the air hammer moving means, and
the air hammer moving means moves forward so as to press-fit the oil seal which is suctioned and held with the hammer head into the structure.

5. The device for press-fitting the oil seal according to claim 4 , wherein
the hammer head comprises a holding member that comprises the holding section and is divided from a head body, and an adjusting member that is interposed between the head body and the holding member, and
the adjusting member is made of a resin that has a hardness lower than a hardness of the holding member.

6. The device for press-fitting the oil seal according to claim 4 , further comprising:
an air hammer positioning means that moves and holds the air hammer to a setting position of the oil seal and a setting position of the structure.

Assignees

• Nissan Motor

Inventors

• Iwashita Tetsunori

Classifications

• Y10T29/5383

  having fluid operator · CPC title

• B23P19/084 Primary

  for placing resilient or flexible rings, e.g. O-rings, circlips · CPC title