JPH04201020A - Oil seal press-fitting method and oil seal press-fitting device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an oil seal press-fitting method and an oil seal press-fitting device for press-fitting an annular oil seal into a press-fitting hole.

[Conventional technology]

Conventional means for press-fitting an oil seal include one using the hammering action of an air hammer, and another for press-fitting an oil seal into a press-fit hole by pressing from a straight direction against the press-fitting surface of the oil seal. For example, Japanese Unexamined Patent Publication No. 61-209827 proposes an oil seal press-fitting device j.

[Problem to be solved by the invention]

However, when using an air hammer, there was a problem in that the hammering noise during press-fitting was significant. Also,
In the latter conventional example, the oil seal is press-fitted all at once without any distortion between the outer surface of the oil seal and the inner surface of the press-fit hole, so there is a problem in which the oil seal returns to its original position and bulges out from the press-fit hole after a while after being press-fitted. It was.

The present invention has been made in view of the above-mentioned problems, and provides an oil seal press-fitting method and an oil seal press-fitting device in which an oil seal can be press-fitted with low noise and the oil seal does not return after being press-fitted. The purpose is to

[Means to solve the problem]

In order to solve the above problems, the present invention takes the following measures.

That is, in an oil seal press-fitting method in which an oil seal is press-fitted into a press-fit hole, after the oil seal is fitted and held in a press-fit head, the press-fit head is pressed down and rotated by a pressurizing rotation means to rotate the oil seal. The oil seal is press-fitted into the press-fit hole while the oil seal is pressed into the press-fit hole.

Further, in an oil seal press-fitting device for press-fitting an oil seal into a press-fit hole, a press-fit head for externally fitting and holding the oil seal, a press-fit head holding portion on which a press-fit head shaft for inserting and fitting the press-fit head is pivotally supported; This oil seal press-fitting device is composed of a pressure-fitting head drive unit that applies a reduction blade and rotational force to a press-fitting head shaft.

Furthermore, the press-fit head shaft is provided with two or more press-fit head insertion parts, the press-fit head shaft and the press-fit head driving part are freely connected, and the press-fit head holding part is rotatably supported, and the press-fit head holding part is rotatably supported. The oil seal press-fitting device includes a press-fit head switching section that rotates a press-fit head holding section to position the press-fit head at a predetermined position.

In addition, the oil seal press-fitting device is configured such that the press-fit head is provided with a slidable pressure roller that presses the upper surface of the oil seal.

[Function] According to the oil seal press-fitting method of the present invention, the oil seal held externally by the press-fitting head is lowered while being rotated by the pressurizing rotation means, so that the outer surface of the oil seal is tightly attached to the inner surface of the press-fitting hole. It is press-fitted while rotating in a state of sliding contact. When the oil seal is press-fitted into the press-fit hole, the friction between the outer surface of the press-fit head and the inner surface of the oil seal is smaller than the friction between the inner surface of the press-fit hole and the outer surface of the oil seal, so the pressurizing rotation means is operated in reverse. By doing so, only the press-fitting head can be removed from the press-fitting hole.

On the other hand, according to the oil seal press-fitting device of the present invention, the press-fit head that externally holds the oil seal is inserted into the press-fit head shaft, and this press-fit head shaft is pivotally supported by the press-fit head holding part, so that the press-fit head When the drive section applies a reduction blade and rotational force to the press-fitting head shaft, the oil seal rotates and descends together with the press-fitting head, and is press-fitted into the press-fitting hole.

In addition, in a press-fit head shaft equipped with two or more press-fit head insertion parts, an oil seal can be held for each press-fit head insertion part, so if the press-fit head drive part and the press-fit head shaft are connected, The oil seal can be press-fitted into the press-fit hole while rotating, and by rotating the press-fit head holding section that pivotally supports the press-fit head shaft using the press-fit head switching section, the oil seal can be switched to another press-fit head and the oil seal can be pressed into the press-fit hole. Press fit.

In addition, if the press-fit head is equipped with a pressure roller, while the oil seal is being press-fitted into the press-fit hole, the pressure roller can slide while pressing down on the oil seal without damaging the top surface of the oil seal. can.

〔Example〕

An embodiment of the present invention will be described based on the drawings. FIG. 1 is an overall view of the oil seal press-fitting device, and FIG. 2 is a partially enlarged view of the oil seal press-fitting device.

As shown in FIG. 1, the oil seal press-fitting device 1 includes a press-fit head drive section 10 that serves as a drive source for press-fitting an oil seal 100 into a press-fit hole 101, and a press-fit head shaft 41 into which a press-fit head 30 is inserted. It is comprised of a press-fit head holding section 40 that supports the press-fit head holder 40, and a press-fit head switching section 50 that rotates the press-fit head holding section 40 in order to switch between the press-fit head 30 and another press-fit head 30A.

The press-fit head drive unit 10 includes a press-fit cylinder 11 for pressing down the press-fit head 30, a NAND runner 12 for rotating the press-fit head 30, and a connection mechanism for transmitting the operation of the press-fit cylinder 11 to the NAND runner 12. 20
It consists of

This press-fit cylinder 11 has a cylinder case installed on the mounting base 3 of the upper support base 2, and is attached in such a manner that the rod 13 is directed upward and expands and contracts in the vertical direction. on the other hand,
The nut runner 12 is inserted into and supported by a casing 14 erected on the upper support base 2, and passes through a hole formed in the upper support base 2. A support rod 15 is provided protruding from the upper part of the nut runner 12, and an output shaft 17 fitted into a clamping member 16 is provided at the lower part. Further, a fitting member 18 is provided at the lower end of the output shaft 17 of the NAND runner 12, and is configured to be connectable to the press-fit head shaft 41. Further, in the connecting mechanism 20, a connecting arm 23 is pivotally connected to a support block 21 provided upright on the mounting table 3 by a support pin 22 serving as a pivot point, and both ends of the connecting arm 23 are press-fitted. cylinder 110 rod 13
The tip end and the tip end of the support rod 15 of the NAND runner 12 are connected by pins 24 and 24, respectively. Therefore, when the rod 13 of the press-fit cylinder 11 is extended, the connecting arm 23 swings in the opposite direction, and the nut runner 1
2 is at the bottom.

The press-fitting head 30 has a substantially truncated conical shape with a stepped portion on its outer circumferential surface, and includes a guide portion 31 having a tapered surface at the tip, a step-faced work contact portion 32 that also serves as positioning during press-fitting, and an oil seal 100. The body 33 has an inner circumferential surface fitted onto the outside, an oil seal pressing portion 34 provided on the outer circumferential surface of the body 33, and an insertion hole 35 extending along the axis. moreover,
Pressing rollers 36 are rotatably attached to two opposing locations on the outer surface of the oil seal pressing portion 34, so as to contact the upper surface of the oil seal 100 and slide while pressing the oil seal 100. Although two pressure rollers 36 are provided in this embodiment, the more the pressure rollers 36, the better, and any number of pressure rollers 36 may be provided. This press-fitting head 30 is connected to a press-fitting head shaft 41 which will be described later.
The insertion hole 35 is inserted into the hole 35 and fixed with a pin 37.

The press-fit head holding section 40 includes the press-fit head shaft 41 that allows the press-fit head 30 and another press-fit head 30A to be inserted into both ends, and a shaft that inserts and supports the press-fit head shaft 41 vertically through a bearing 42. It is comprised of a support 43 and a bracket 46 that is attached to the lower part of the lower support base 4 and supports the stepped portions 44 at both ends of the shaft support 43 via bearings 45.

Two types of press-fit heads 30.30A (or two identical press-fit heads may be used) can be inserted into both shaft ends of the press-fit head shaft 41, and the output shaft 17 of the nut runner 12
Fitting connection parts 41A, 41A that can be fitted and removed from the lower end portion respectively
is provided at the end.

In order to connect the press-fit head shaft 41 and the output shaft 17 of the nut runner 12, or to hold an oil seal to the press-fit head located on the upper side of the press-fit head shaft 41, or to rotate the press-fit head holding part 40, An opening 5 is formed in the lower support base 4 from the orbit of the press-fitting head shaft 41 .

Furthermore, the press-fit head switching section 50 is for rotating the shaft support 43 of the press-fit head holding section 40 to switch the press-fit head 30 to another press-fit head 30A, and is fixedly installed at the bottom of the lower support base 4. An output shaft 52 of a motor 51;
A retaining shaft 47 protruding from the end of the shaft support 43 of the press-fit head holder 40 is connected by a joint member 53. A keyway is formed in the output shaft 52 and the retaining shaft 47, and the joint member 53
The shaft support 43 of the press-fitting head holder 40 is rotated by the drive of the motor 51. Note that the reference numeral 101 is a press-fit hole provided in the workpiece.

The operation of the oil seal press-fitting device 1 configured as described above will be explained together with its press-fitting method.

First, the press-fit head 3 located above the press-fit head shaft 4I
0, the oil seal 100 is fitted and held externally, and the motor 51 of the press-fit head switching section 50 is driven to reverse the shaft support 43 of the press-fit head holding section 40 by 180 degrees (the state shown in FIG. 1). Furthermore, the press-fit cylinder 11 of the press-fit head drive unit 10 is operated, and the nut runner 1 is connected via the coupling mechanism 20.
Descend 2. As a result, the fitting member 18 of the output shaft 17 is connected to the fitting connection portion 41A of the press-fit head shaft 41, as shown by the imaginary line in FIG. Furthermore, the entire oil seal press-fitting device 1 is lowered by an unillustrated lifting device to a position where the oil seal 100 of the press-fitting head 30 faces the press-fitting hole 101 of the workpiece. After the press-fit head 30 is once raised slightly, the nut runner 12 is operated to rotate the press-fit head 30. Without delay, the press-fit cylinder 11 is operated to press down the press-fit head 30. Since the press-fitting head 30 descends while rotating, the oil seal 100 is press-fitted into the press-fitting hole 101 while rotating.

Since two press-fit heads 30.degree. 30A can be inserted into the press-fit head shaft 41, the next step is to switch to another press-fit head 30A. After lifting the press-fit head 30 that has finished press-fitting the oil seal 100, press-fit hend shaft 41 fitting connection portion 4
The connection between 1A and the fitting member 18 of the output shaft 17 is released. Next, press-fit the new oil seal with the upper spatula)" 30
Fit and hold on A. Then, the motor 5I of the press-fit head switching unit 50 is driven to switch the upper and lower press-fit heads 30A.

Invert 30. From now on, the oil seal of the press-fitting head 30A is press-fitted into the press-fitting hole of another workpiece in the same manner as in the above operation. As described above, the press-fitting work is continuously performed by repeatedly reversing the press-fitting hand 30.3OA.

Furthermore, while the oil seal 100 is being press-fitted into the press-fitting hole 101, the press roller 36 is sliding while pressing the top surface of the oil seal 100. 100 can be press-fitted smoothly without damaging the upper surface.

In addition, in the embodiment, it is possible to insert two press-fit hemlocks F'30.3OA and switch between them alternately, but instead of this, only one press-fit head can be inserted into the press-fit head shaft. Alternatively, the shaft support of the press-fitting head holding section may be attached with a bracket without rotation, and the press-fitting head switching section may be omitted, and only one press-fitting head may be provided. Accordingly, the NAND runner output shaft may be connected in advance to the upper end of the press-fitting head shaft.

Furthermore, the pressing roller 36 is for pressing down the upper surface of the oil seal 100 while rotating smoothly,
In particular, instead of a roller, it may be an oil seal pressing portion that slides in contact with the oil seal.

〔Effect of the invention〕

Since the present invention is configured as described above, it has the following effects.

Since the oil seal is pressed down while rotating into the press-fitting hole without applying a blow to the oil seal, the work can be performed with low noise without making a large noise when press-fitting into the press-fitting hole.

Since the oil seal descends while rotating, the outer surface of the oil seal and the inner surface of the press-fit hole are press-fitted with a slight movement. This allows the oil seal to return after being press-fitted.

In addition, since two or more press-fit holes are provided on the press-fit shaft, it is possible to hold the oil seal in each, and it is also possible to insert two or more types of press-fits and throats. Therefore, if the press-fitting head holding section is made freely connectable to the normal large hend drive section and the press-fitting head holding section is made rotatable by the press-fitting head switching section, press-fitting work can be performed while switching between other press-fitting heads.

Furthermore, since the press-fit head is equipped with a pressure roller,
While the oil seal is press-fitted into the press-fit hole, it slides while pressing the top surface of the oil seal, allowing the press-fitting operation to be performed without damaging the top surface of the oil seal.

[Brief explanation of the drawing]

The drawings relate to an embodiment of the present invention, and FIG. 1 is an overall view of an oil seal press-fitting device, and FIG. 2 is a partially enlarged view of the oil seal press-fitting device. 1... Oil seal press-fit device 10... Press-fit head drive unit 11... Press-fit cylinder 12... Nut runner 17... Output shaft 18... Fitting member 20...
...Connection mechanism 30.30A...Press-fit head 31...Guide part 32...Work contact part 3
3...Body part 34...Oil seal pressing part 35...Insertion hole 36...Press roller 3
7... Bin 40... Press-fit head holding part 41... Press-fit head shaft 41A... Fitting connection part 4
2... Bearing 43... Shaft support 47...
Engagement shaft 50...press-fit head switching section 51...
・Motor 52...Output shaft 53...Joint member 100...Oil seal 101...Press-in hole procedure amendment order dated March 30, 1991 1, Indication of incident Patent application No. 2-332344 2. Title of the invention: Oil seal press-fitting method and oil seal enlargement device 3. Relationship with the case of the person making the amendment: Patent applicant name: Honda Motor Co., Ltd. 4; Agent address: 2-1 Higashikanda, Chiyoda-ku, Tokyo 101 11
No. 5, Subject of amendment 6, Contents of amendment (1) The "Claims" column of the specification is amended as shown in the attached sheet. (2) The ``Detailed Description of the Invention'' column of the specification is amended as follows. (a) Change "Press-fit the oil seal into the press-fit hole while rotating" to "Press-fit the oil seal into the press-fit hole while rotating" in lines 2 to 4 of page 4 of the specification. correct. (b) Page 5, lines 4 to 6 of the specification: "Since the undersewing is carried out while being fitted and held by the press-fit head,"
should be corrected to ``The press-fit head that holds the oil seal externally is rotated while being pressed down by the pressurizing rotation means.'' (C) Delete the phrase "rotate nakara" on page 5, line 8 of the specification. (d) From page 5, line 19 to page 6, line 1 of the specification, ``The press-fit head and the press-fit head are press-fitted into the press-fit hole.'' is replaced with ``The oil seal is sewn and press-fitted into the press-fit hole.'' Corrected to J. (e) Delete the phrase "rotate no kara" on page 6, line 6 of the specification. g) Delete the words "while rotating" from the first and second lines of page 12 of the specification. (6) In the specification, page 14, line 2, "The oil seal is pressed down while rotating into the press-fit hole, so when press-fitting into the press-fit hole, J is pressed into the press-fit hole, and C is rotated while being pressed down. ↓
Correct this when press-fitting. (5) In the 5th line of page 14 of the specification, ``Because the oil seal rotates and descends,'' is corrected to ``Because the press-fit head rotates while descending.'' 2. Claims (1) In the oil seal press-fitting method of press-fitting an oil seal into a press-fitting hole, after the oil seal is externally fitted and held in a press-fitting head, the press-fitting head is pressed down by a pressurizing rotation means and is rotated. Please install the 1t oil seal without any problem (hole ≧pressure).
A- An oil seal press-fitting method characterized by the following. (2) In an oil seal press-fitting device that press-fits an oil seal into a press-fit hole, there are two types: a press-fit where the oil seal is fitted externally and held, and a press-fit where the press-fit head shaft into which the press-fit head is inserted is pivotally supported. An oil seal press-fitting device comprising: a seven-head holding section; and a press-fitting head drive section that applies a rolling blade and rotational force to the press-fitting head shaft. (3) the press-fit head shaft is provided with two or more press-fit hend insertion parts, the press-fit head shaft and the press-fit head driving part are freely connected, and the press-fit head holding part is rotatably supported; The oil seal press-fitting device according to claim 2, further comprising a press-fit head switching section that rotates the press-fit head holding section to position the press-fit head at a predetermined position. (4) The oil seal press-fitting device according to claim 2 or 3, wherein the press-fitting head is provided with a slidable pressure roller that presses the upper surface of the oil seal.

Claims (4)

[Claims] (1) In an oil seal press-fitting method in which an oil seal is press-fitted into a press-fit hole, after the oil seal is fitted and held in a press-fit head, the press-fit head is pressed down and rotated by a pressurizing rotation means to close the oil seal. An oil seal press-fitting method characterized by press-fitting an oil seal into a press-fitting hole while rotating it. (2) An oil seal press-fitting device for press-fitting an oil seal into a press-fit hole, comprising: a press-fit head that fits and holds the oil seal; a press-fit head holding portion on which a press-fit head shaft into which the press-fit head is inserted is pivotally supported; An oil seal press-fitting device comprising: a press-fit head drive section that applies a rolling force and rotational force to the press-fit head shaft. (3) The press-fit head shaft is provided with two or more press-fit head insertion parts, the press-fit head shaft and the press-fit head driving part are freely connected, and the press-fit head holding part is rotatably supported; The oil seal press-fitting device according to claim 2, further comprising a press-fit head switching section that rotates the press-fit head holding section to position the press-fit head at a predetermined position. (4) The oil seal press-fitting device according to claim 2 or 3, wherein the press-fit head is provided with a slidable press roller that presses the upper surface of the oil seal.