JPS5932531Y2 - Grease seal removal device for sealed rolling bearings - Google Patents

Description

[Detailed description of the invention] The present invention relates to a grease seal removal device that can easily remove a deteriorated grease seal attached to a sealed rolling bearing from the bearing, and its purpose is to contribute to the easy replacement of the grease seal. shall be.

The present invention includes a cylindrical metal fitting having an inner periphery into which the outer ring of a sealed rolling bearing can fit, and a cylindrical metal fitting that is attached to a predetermined outer periphery of the cylindrical metal fitting such that its upper surface is positioned a predetermined amount higher than the upper surface periphery of the cylindrical metal fitting. an arm support having a U-shaped cross section; and a through hole having a predetermined lateral length, which is attached to the lower end of the arm support so as to pass through the upper part of the arm support, and is engaged with an arm mounting bolt;
A lifting arm is provided with a fishing key whose tip is bent into an L-shape at the other end, and a lifting claw bent at right angles in the direction of the fishing key at the lower end of the lifting arm near the fishing key. In addition to providing it as one unit, a jack holder is provided on the lower surface of the fishing key that protrudes by a predetermined amount from the tip, and a vertical jack guide is provided on the outer periphery of the upper cylindrical metal fitting that protrudes from the arm support attachment part to 1800. A jack that can be moved up and down along the jack guide is provided, and a keyhole cover with a keyhole formed above is attached to the outer periphery of the jack guide on the opposite side of the cylindrical metal fitting, and a lifting arm is attached to the through-hole. When the hook is moved toward the arm support until one end of the hook contacts the arm mounting bolt, the tip of the fishing key will lock into the keyhole of the keyhole cover, and the lower part of the lifting claw will be positioned toward the center of the cylindrical metal fitting. At the same time, the jack holder and the head of the jack separated from the overlapping position due to the lateral displacement of the jack holder, and the lifting arm was moved in the jack guide direction until the other end of the through hole came into contact with the arm mounting bolt. At this time, the tip of the lifting claw approaches the opposing inner periphery of the cylindrical metal fitting, the fishing key is released from the keyhole of the cover with a keyhole, and the jack holder and jack head are set in an overlapping position. The gist is that.

The present invention will be explained according to the embodiment shown in FIGS. 1 to 4C.

Reference numeral 1 denotes a cylindrical metal fitting, the inner periphery of which is set so that a rolling bearing 24 including an outer ring 2T, which will be described later, can be fitted therein.

An arm support receiver 22 is provided at a predetermined position on the outer periphery of the cylindrical round tool 1, and the lower end of the arm support 19 having a U-shaped cross section is attached to the arm support receiver 22 using a bolt 20 and a nut 21. Install it so that it can rotate using it as a fulcrum.

A bolt 18 attached to the upper end of the arm support 19 using a nut 17 passes through a horizontally long through hole 16 formed at the right end of the lifting arm 15 in FIG.

Since the thickness W of the lifting arm 15 is smaller than the distance between the inner walls in the longitudinal direction of the arm support 19, the lifting arm 15 can be moved along the inner wall of the arm support 19 within a range corresponding to the longitudinal length of the through hole 16. It is movable.

A fishing key 11 whose tip is bent into an L-shape is attached to the tip of the lifting arm 15, and a jack money receiver 13 is provided at the lower part of the fishing key 11 adjacent to the lifting arm 15.
The lower surface of the jack receiver 13 has a VC jack receiver 9 fixed thereto.

Reference numeral 14 denotes a lifting claw formed as one body on the lower surface of the lifting arm 15 near the fishing key 11, and the lower part of the lifting claw 14 is directed toward the inner wall facing the cylindrical metal fitting 10 at a Y right angle.

A jack guide 3 is attached to the outer periphery of the cylindrical metal fitting 1 extending 180 degrees from the outer periphery to which the arm support 19 is attached.

1 is a nut for tightening the jack.

Reference numeral 2 denotes an oil jack, which is movable in the vertical direction along a jack guide 3.

4 is an oil jack joint nut, which is connected to an oil pump (not shown).

Reference numeral 6 denotes a cover with a keyhole fixed to the periphery of the jack guide 3 on the side opposite to the cylindrical metal fitting 10 so as not to come into contact with the cylindrical metal fitting 1, and a keyhole 61 into which the tip of the fishing key 11 can be inserted is provided on the upper back side of the cover. , and a notch 62 adjacent to the cylindrical metal fitting 1 and facing the upper part of the jack guide 3 is notched.

Reference numeral 10 denotes a locking bolt provided in the keyhole 61 to which the tip of the fishing key 11 is locked.

In such a configuration, the case where the grease seal of the sealed rolling bearing according to the present invention is removed will be explained with reference to FIGS. 4a to 4c.

2/ In Fig. 4 a-C, 24 indicates a sealed rolling bearing with a grease seal, 25 indicates a roller bearing, 26 indicates a roller, 21
is an outer ring, and the tip of a mounting member 281 of the grease seal 28 is fitted into a clip 29 formed on the inner periphery of the outer ring 27.

From the state shown in FIG. 1, move the lifting arm 15 in the direction b until the arm mounting bolt 18 hits the left end of the through hole 16.

As a result, the jack holder 9 and the jack head 8 are brought out of contact, and the tip of the fishing key 11 is locked to the fishing key locking bolt 10 in the keyhole 61.

The sealed rolling bearing 24 is placed in such a state that the grease seal 28 is located above, and the cylindrical fitting 1 of the grease seal removing device is attached to the sealed rolling bearing 24 according to the present invention.
The outer ring 2γ is lowered from above and the outer circumference of the outer ring 2γ is fitted onto the inner circumference of the cylindrical metal fitting 1.

In this case, the lifting claw 14 is attached as one unit with the lifting arm 15, and when the lifting arm 15 is moved in the b direction as described above, the circumference VC of the grease school 24 is set so as not to come into contact with it. Therefore, the fitting of the outer ring 2γ to the inner periphery of the cylindrical fitting 1 can be carried out without any problem.

Thereafter, the lifting arm 15 is moved in the direction a until the right end of the through hole 16 comes into contact with the arm attachment bolt 18.

As a result, the tip bent portion 141 of the lifting claw 14 is placed over the lower periphery of the Grib Seat #28, the one-way jack holder 9 and the jack head 8 overlap, and the tip bent portion 111 of the fishing key 11 is overlapped.
is unlocked from the keyhole 61 and enters the state shown in FIG. 4a.

Thereafter, by driving an oil pump (not shown), the oil jack 2 rises along the jack guide 3, whereby the jack head 8 pushes up the jack holder 9, and the lifting arm 15 is attached using the bolt 20 as a fulcrum. By rotating the lifting claw 14 upward, the bent portion 141 of the lifting claw 14 pushes up the opposing lower circumference of the grease seal 28. As a result, the grease sol 28 is moved as shown in FIG.
The clip 29 of the outer ring 27 also comes off.

Thereafter, by moving the lifting arm 15 in the direction b, the fishing key 11 is moved into the keyhole 61Vr, as shown in FIG. 4e.
- The lifting arm 15 and the keyhole cover 6 are engaged, the jack holder 9 and the jack head 8 are released from contact, and the lower bent portion 141 of the lifting claw 15 moves sufficiently to the right.

Therefore, the extracting device according to the present invention can be used with rolling bearings 2
Can you extract it from 4?

Conventionally, to remove the grease seal from a sealed rolling bearing, you lay the sealed rolling bearing horizontally, put your foot over the center of the outer ring, roll, hold the bearing, apply a cutting chisel diagonally to the outer periphery of the greasesol, and then use a hammer to remove the grease seal. The method involved applying force in the tangential direction and punching out the material, which took a considerable amount of time and effort.

According to the present invention, the grease seal of a sealed rolling bearing can be removed much more easily than in the past, so replacing the grease sol is extremely easy.
Its practical effect is remarkable.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing the overall configuration of the present invention, and Fig. 2 is a perspective view showing the overall configuration of the present invention.
3 is a sectional view taken along the line A--A in FIG. 2, and FIGS. 4 a-c are longitudinal sectional views for explaining the operation of the present invention. 1... Cylindrical metal fitting, 2... Jacket, 3... Jacket guide, 6... Cover with keyhole, 9... Jacket receiver, 11... Fishing key, 14... Lifting claw , 15...
Lifting arm, 16... Through hole, 18... Arm mounting bolt, 19... Arm support, 21... Outer ring of sealed rolling bearing.

Claims (1)

[Scope of utility model registration request] A cylindrical metal fitting having an inner periphery into which an outer ring of a sealed rolling bearing can fit, and a cross-sectional piece that is attached to a predetermined outer periphery of the cylindrical metal fitting so that its upper surface is located a predetermined amount higher than the upper surface periphery of the cylindrical metal fitting. A letter-shaped arm support, an arm attachment port attached to one end so as to pass through the upper part of the arm support, and a through hole having a predetermined lateral length, which is locked, are formed at the other end. A lifting arm is provided with a fishing key whose tip is bent into an L-shape, and a lifting claw is provided in the lower part of the lifting arm close to the fishing key [i.e., one lifting claw with its lower end bent approximately at right angles toward the key. At the same time, a jack holder is provided on the lower surface of the fishing key from a predetermined distance from the tip, and a vertical jack guide is provided on the outer periphery of the upper cylindrical metal fitting extending from the arm support mounting part to 1800. A jack is provided that can be moved up and down along the jack guide, and a cover with a keyhole with a keyhole formed above is attached to the outer periphery of the jack guide on the opposite side of the cylindrical metal fitting. When moved in the direction of the arm support until it touches the arm mounting bolt, the tip of the fishing key locks into the keyhole of the keyhole cover, the lower part of the lifting claw is positioned toward the center of the cylindrical metal fitting, and When the jack holder and the jack head are separated from the overlapping position due to the lateral displacement of the jack holder, and the lifting arm is moved in the jack guide direction until the other end of the through hole makes contact with the arm mounting pole,
This is because the tip of the lifting claw is close to the opposing inner periphery of the cylindrical metal fitting, the keyhole cover of the fishing key is released from the keyhole, and the jack holder and jack head are in an overlapping position. Grease seal removal device for sealed rolling bearings.