JPH1026296A - Grease injection jig - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the grease injection jig which can inject the desired quantity of grease almost uniformly over the whole of bearings, and is excellent in operating capability. SOLUTION: An inner race B12 of a bearing B1 is inserted into a guiding shaft 15 of a lower closure 10, and the bearing B1 is thereby housed in the lower side housing part of the lower closure 10. Subsequently the inner race B22 of the other bearing B2 is inserted into the guiding shaft 15, let the wide mouth sides of the paired bearings B1 and B2 matched with each other, and the male screw part 22 of the upper closure 20 is thereby threadedly engaged with the female screw part 12 of the lower closure 10. In this case, four through holes 26 provided for a disk member 25 are faced to a space between a holder B21 and the inner race B22. Under this condition, grease is fed from a grease nipple 30, and the supply of grease is suspended at the time when grease is discharged out of an air hole 13. By this constitution, only the quantity of grease equivalent to the capacity of the cavity of the grease injection jig can thereby be injected into the bearings B1 and B2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a grease injection jig for injecting grease into a bearing having a plurality of rotating rollers rotatably supported between a retainer and an inner ring.

[0002]

2. Description of the Related Art Conventionally, assembling work of a rubber joint and a pulley shaft as shown in FIG. 7 has been performed in the following procedure. That is, the bearing body 91 to which the outer ring B14 of the bearing is attached is inserted into the rotating shaft 92 (FIG. 8A), grease is injected into the bearing B1, and the bearing B1 is placed on the rotating shaft 92 and press-fitted with a press (FIG. 8A). 8 (b)). Next, grease is injected into the groove of the spacer 93, and the spacer 93 is inserted into the bearing body 91 (FIG. 8C). Subsequently, after injecting grease into the other bearing B2, the bearing is placed on the rotating shaft 92 and press-fitted with a press (FIG. 8D). Then, the outer ring B24 of the bearing B2 is inserted into the bearing body 91, and finally, grease is injected into the bearing lid 94, and the grease is injected into the bearing body 9.
1 with bolts (FIG. 8 (e)). By performing the assembling work in this manner, the rubber joint and the pulley shaft have been assembled.

[0003]

When such an assembly is performed, the operator injects grease into the bearing by hand using an iron spatula or the like. However, it is difficult to inject grease into the inside of the bearing, that is, the gap between the retainer and the inner ring as compared with the outside of the bearing, that is, the outside of the cage. For the configuration of the bearing, see, for example, Fig. 4. That is, in the bearing B2 of Fig. 4, a plurality of rotating rollers B23 are rotatably supported between the retainer B21 and the inner ring B22.

Since the amount of grease to be injected is specified for each bearing shape in many cases, it has been grasped by measuring before and after the injection of grease.
In this case, weighing work is not easy because grease is attached around the bearings, and the operator has to carry out weighing several times until the amount of grease injected substantially matches the specified amount. Was complicated.

Further, when the grease is manually injected, the grease adheres to the gloves, resulting in poor workability. The present invention has been made in view of the above problems, and an object of the present invention is to provide a grease injection jig that can inject a desired amount of grease into the entire bearing substantially uniformly and that is excellent in workability.

[0006]

Means for Solving the Problems and Effects of the Invention In order to solve the above problems, the invention according to claim 1 is characterized in that a grease is applied to a bearing in which a plurality of rotating rollers are rotatably supported between a retainer and an inner ring. A grease injection jig for injecting the bearing, a storage portion for storing the bearing in a state where the inner space of the inner race of the bearing is closed, a grease supply port for supplying grease from the outside to the storage portion, An air hole communicating the storage portion with the outside is provided, and a void volume when the bearing is stored in the storage portion substantially coincides with a predetermined grease injection amount.

[0007] In such a grease injection jig, the bearing is stored in the storage portion in a state where the inner space of the inner ring is closed by, for example, a shaft member or the like. Then, grease is supplied from the grease supply port into the storage section by a grease supply device such as a grease gun or a grease pump.
Then, grease is supplied into the storage unit while the air in the storage unit is exhausted from the air holes. At this time, since the inner space of the inner ring of the bearing is closed, grease does not enter this portion. Then, when the grease is filled in the storage portion in which the bearing is stored, the state is such that the grease is substantially uniformly injected into the entire bearing. That is, the state is such that grease is uniformly injected into the gap between the rotating rollers of the bearing and the retainer and the gap between the rotating rollers and the inner ring. Here, since the void volume when the bearing is stored in the storage portion is designed to substantially match the predetermined grease injection amount, the filled grease amount substantially matches the predetermined grease injection amount. I do.

[0008] The predetermined grease injection amount refers to an amount specified by the shape of the bearing, for example, in view of the possibility that inconvenience may occur if the amount of grease is too large or too small. . According to this grease injection jig, a desired amount of grease can be almost uniformly injected into the entire bearing, and the effect that the operator's hands are not stained and the workability is excellent is obtained.

Here, the grease injection jig according to claim 1 is a grease injection jig according to claim 2, wherein the first lead-out path guides the grease injected from the grease injection port to outside the retainer of the bearing. And a second lead-out path for guiding grease injected from the grease injection port into a gap between a retainer of the bearing and an inner ring.

Normally, the resistance when grease is injected into the gap between the bearing retainer and the inner ring is greater than when grease is injected outside the bearing retainer. Since the second lead-out path is provided to positively inject grease into this gap, grease is easily injected into this gap. For this reason, the grease is easily uniformed over substantially the entire bearing.

[0011] According to a third aspect of the present invention, there is provided a storage portion capable of storing grease injected from the grease injection port on a surface covering substantially the entire upper portion of the bearing.
The storage section may be provided on the upstream side of the first and second outlet paths. In this case, the grease injected from the grease injection port is temporarily stored in the storage section,
It collects substantially evenly on a surface that covers substantially the entire upper part of the bearing, and is thereafter guided to the outside of the cage of the bearing or the gap between the cage and the inner ring via the first and second lead-out paths. For this reason, grease spreads easily over the whole bearing compared with the case where there is no storage part. In other words, if there is no reservoir, the grease injected from the grease inlet into the storage unit may reach the bearing as it is along the direction of injection, so the case with the reservoir is more evenly distributed over the entire bearing. Grease spreads easily.

According to a fourth aspect of the present invention, there is provided a grease injection jig for injecting grease into a bearing having a plurality of rotating rollers rotatably supported between a retainer and an inner ring, wherein the inner ring of the bearing is provided. A storage portion for storing the bearing in a state in which the inner space is closed, a grease injection port provided at an upper portion of the storage portion, and for injecting grease into the storage portion from the outside, and a board surface having an upper inner surface of the storage portion. A disc-shaped member having a gap, an outer edge having a gap with a side inner surface of the storage portion, and further disposed so as to cover a gap between a retainer of the bearing and an inner ring; A plurality of through holes provided at positions facing the gap between the retainer of the bearing and the inner ring without facing the injection port, and air holes provided at a lower portion of the storage portion and communicating the storage portion with the outside. And the Void volume when accommodating the bearing section, characterized in that the substantially coincides with the predetermined grease injection volume.

In such a grease injection jig, the plurality of through-holes serve as the second lead-out path, and the gap between the board-shaped member and the inner side surface of the storage portion serves as the first lead-out path. .
Further, the gap between the board surface of the board-shaped member and the upper inner surface of the storage section plays the role of the storage section in claim 3. In other words, the grease injected from the grease injection port once accumulates substantially evenly on the board surface, and the grease is discharged substantially uniformly in each of the plurality of through holes. In addition, the grease is derived not from a part of the outer edge of the board-shaped member but from the entire periphery of the outer edge. For this reason, the grease is more easily and uniformly injected over substantially the entire bearing.

Further, the present inventors adopt a configuration in which the grease inlet is provided at the upper part of the storage part and the air hole is provided at the lower part of the storage part. To show that the grease was filled at the same time. This is considered to be because the grease has a so-called glue shape and has no viscosity. Therefore, the completion of the grease injection can be visually recognized, and the end of the work can be easily confirmed.

In the grease injection jigs of the first to fourth aspects, only one bearing may be accommodated in the accommodating portion. However, in consideration of the fact that the bearing is often used as a pair, it is described in the fifth aspect. As described above, it is preferable that the pair of bearings be stored in the storage section. In this case, since the grease can be injected substantially uniformly into the pair of bearings by a single grease injection operation, the operation time is reduced. In some cases, the number of bearings that can be stored in the storage unit may be further increased.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. Note that the embodiment of the present invention
It is needless to say that the present invention is not limited to the following embodiments, and can take various forms within the technical scope of the present invention.

1A and 1B are explanatory views of a lower cover of a grease injection jig, wherein FIG. 1A is a plan view, FIG.
(C) is a bottom view. 2A and 2B are explanatory diagrams of a top cover of a grease injection jig, wherein FIG. 2A is a plan view, FIG. 2B is a partial front sectional view, and FIG. 2C is a bottom view. The grease injection jig 1 of the present embodiment mainly includes a lower lid 10 and an upper lid 20.

As shown in FIG. 1, the lower lid 10 has a circular bottom surface 10a and a cylindrical side surface 10b. Inside the lower lid 10, a lower storage portion 11, which is a concave portion having a substantially truncated conical cross section, is formed, and a female screw portion 12 is formed above the lower storage portion 11. An air hole 13 is provided in the lower surface 11 a of the lower storage portion 11 to communicate the outside with the lower storage portion 11. An insertion hole 14 is provided at substantially the center of the lower surface of the lower storage portion 11, and a support portion 15 a of the guide shaft 15 is fitted into the insertion hole 14.

As shown in FIG. 2, the upper cover 20 has a circular ceiling surface 20a and a cylindrical side surface 20b in appearance. Inside the upper lid 20, an upper storage portion 21 which is a concave portion having a substantially truncated conical cross section is formed, and a male screw portion 22 is formed below the upper storage portion 21. A grease nipple 30 is provided on the upper surface 21a of the upper storage portion 21.
(See FIG. 3). A screw hole 23 capable of screwing the same is provided, and a plate-like member 25 is provided via a cylindrical portion 24. The disc-shaped member 25 is provided with a gap with the upper surface 21 a of the upper storage portion 21 due to the presence of the columnar portion 24, and the outer edge thereof is provided with a gap with the side surface 21 b of the upper storage portion 21. The board-shaped member 25 has through holes 26 at four locations.

Next, an operation of injecting grease into a pair of bearings by the grease injection jig 1 will be described with reference to FIGS. FIG. 3 is a cross-sectional view of the grease injection jig when the bearing is stored in the storage section.
FIG. 4 is an explanatory diagram when grease is supplied to a grease injection jig. The bearing B1 is, as shown in FIG.
A plurality of rotating rollers B1 between the retainer B11 and the inner race B12;
3 is supported so as to be rotatable, and the bearing B2 is also the same.

First, the lower lid 1 to which the upper lid 20 is not screwed is attached.
The inner ring B12 of the bearing B1 is inserted into the 0 guide shaft 15, and the bearing B1 is stored in the lower storage portion 11 of the lower cover 10. At this time, each rotating roller B13 of the bearing B1 is in line contact with the side surface 11b of the lower storage portion 11. Also,
The air hole 13 is not covered by the retainer B13 of the bearing B1.

Next, the inner ring B22 of the other bearing B2 is inserted into the guide shaft 15, and a pair of bearings B1,
The wide mouth sides of B2 are matched with each other. At this time, the height of the upper portion of the bearing B2 is substantially equal to the upper surface of the guide shaft 15. Subsequently, the male screw portion 22 of the upper lid 20 is screwed into the female screw portion 12 of the lower lid 10. At this time, each roller B23 of the bearing B2 is connected to the side surface 21 of the upper storage portion 21 of the upper lid 20.
is in line contact with b. The four through holes 26 provided in the board-shaped member 25 face between the retainer B21 and the inner ring B22. In addition, the upper part of the bearing B2 and the board-shaped member 25 are arranged with a gap.

In this state, a grease gun or a grease pump (not shown) is connected to the grease nipple 30, and the grease is gradually supplied to the grease injection jig 1 little by little. Then, as shown by the dotted arrow in FIG. 4, the grease spreads almost evenly on the upper surface of the board-shaped member 25 via the grease nipple 30, and a part of the grease passes through the four through holes 26 and the grease holds the bearing B2. Bowl B21 and inner ring B22
Of the bearing B2, not from a part of the outer edge of the plate-shaped member 25 but from the entire outer edge.
It is led to outside. The former grease is further led to the gap between the retainer B11 of the bearing B1 and the inner ring B12,
The latter grease is further guided outside the cage B11 of the bearing B1.

When the pressurized supply of grease is continued, the grease is finally discharged from the air holes 13. At this point, it has been empirically confirmed that the grease has filled the gaps in the upper storage portion 21 and the lower storage portion 11 of the grease injection jig 1. Therefore, the supply of the grease is stopped, and the grease gun is moved to the grease nipple 30. Remove from Then, the screw is released by rotating the upper lid 20 and the upper lid 20 is removed. Thereafter, the bearings B2 and B1 are removed.

For example, as shown in FIG. 5, the hook-like tips (bent outward) of both legs 32, 32 of a substantially U-shaped extraction jig 31 are connected to the inner peripheral side of the retainer B21 of the bearing B2. , The bearing B2 is pulled out by lifting in the direction of the white arrow, and then, as shown in FIG.
The bearing B1 may be pulled out by hooking the hook-shaped tip (bent inward) of 32 'on the outer peripheral side of the inner ring B12 of the bearing B1 so as to lift in the direction of the white arrow.

As described above, according to the grease injection jig 1 of the present embodiment, a desired amount of grease is applied to the bearings B1, B
2 can be injected almost uniformly (especially, the gap between the bearing's rotating rollers and the cage, the gap between the rotating rollers and the inner ring), and the operator's hands do not become dirty and do not need to be weighed. Is obtained. The bearings B1 and B2 into which grease is injected in this manner are shown in FIG.
7 can be used as a component of a rubber joint or a pulley shaft shown in FIG.

In the above embodiment, for example, when the bearings B1 and B2 are stored in the lower storage portion 11 and the upper storage portion 21, the void capacity is 180 g to 270 g of grease.
When the air hole 13 has a capacity of φ2 mm,
The gap between 5 and the side surface 21b of the upper storage section 21 is 1.5 m.
m, and the through hole 26 was φ4 mm.

In the above embodiment, for example, FIG.
As shown in the figure, a plurality of (for example, 2
Are provided in the jig mounting table 37.
If the column-shaped convex portion 38 is provided, it is not necessary to grip the lower cover 10 when the upper cover 20 is rotated to release and remove the screw by removing the upper cover 20, and the upper cover can be easily removed. it can.

Further, before supplying grease into the grease injection jig 1, an exhaust pump is connected to the air hole 13 to make the inside of the grease injection jig 1 substantially in a vacuum state, and then the air hole 13 is closed. Grease may be supplied from the grease nipple 30.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a lower cover of a grease injection jig;
(A) is a plan view, (b) is a partial front sectional view, and (c) is a bottom view.

FIG. 2 is an explanatory diagram of a top cover of a grease injection jig;
(A) is a plan view, (b) is a partial front sectional view, and (c) is a bottom view.

FIG. 3 is a cross-sectional view of a grease injection jig when a bearing is stored in a storage unit.

FIG. 4 is an explanatory diagram when grease is supplied to a grease injection jig.

FIG. 5 is an explanatory diagram when a bearing is removed.

FIG. 6 is an explanatory diagram when a bearing is removed.

FIG. 7 is a perspective view (partial sectional view) of a rubber joint or a pulley shaft.

FIG. 8 is an explanatory view showing a procedure of assembling a rubber joint or a pulley shaft.

[Explanation of symbols]

1 ... Grease injection jig, 10 ... Lower lid, 11 ...
・ Lower storage part, 13 ・ ・ ・ Air hole, 15 ・ ・ ・ Guide shaft,
20 ... top lid, 21 ... upper storage part, 21a ...
Upper surface (upper inner surface), 21b ... side surface (side inner surface), 2
5: board-like member, 26: through hole, 30: grease nipple, 91: bearing body, 92: rotating shaft, 9
3 ... spacer, 94 ... bearing lid, B1, B2
..Bearing, B11, B21 ... Cage, B1
2, B22: inner ring, B13, B23: rotating roller, B14, B24: outer ring.

Claims (5)

[Claims] 1. A grease injection jig for injecting grease into a bearing in which a plurality of rotating rollers are rotatably supported between a retainer and an inner ring, the grease injection jig closing an inner space of an inner ring of the bearing. A storage portion for storing the bearing in a state, a grease supply port for supplying grease from the outside to the storage portion, and an air hole communicating the storage portion with the outside, wherein the bearing is stored in the storage portion. A grease injection jig, wherein a void volume of the grease is substantially equal to a predetermined grease injection amount. 2. A first lead-out path for guiding grease supplied from the grease supply port to the outside of the retainer of the bearing, and a gap between the retainer of the bearing and the inner ring of the grease supplied from the grease supply port. The grease injection jig according to claim 1, further comprising a second lead-out path leading to the grease. 3. A storage unit capable of storing grease supplied from the grease supply port on a surface covering substantially the entire upper part of the bearing, the storage unit being upstream of the first and second lead-out paths. The grease injection jig according to claim 2, wherein the jig is provided on a jig. 4. A grease injection jig for injecting grease into a bearing in which a plurality of rotating rollers are rotatably supported between a retainer and an inner ring, the grease injection jig closing an inner space of an inner ring of the bearing. A storage portion for storing the bearing in a state, a grease supply port provided at an upper portion of the storage portion, for supplying grease to the storage portion from the outside, and a board surface having a gap with an upper inner surface of the storage portion, and an outer edge. Has a gap with the inner surface of the side of the storage part, and furthermore, a disc-shaped member arranged so as to cover the gap between the retainer of the bearing and the inner ring, and the grease supply port of the disc-shaped member is face-to-face. A plurality of through holes provided at a position facing a gap between the retainer of the bearing and the inner ring, and an air hole provided at a lower portion of the storage portion and communicating the storage portion with the outside. Characteristic grease Nyuchi tool. 5. The grease injection jig according to claim 1, wherein the storage portion is capable of storing at least a pair of bearings.