JPS6049800B2 - How to fill lubricating grease in a double row bearing with separate inner ring - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for filling lubricating grease into a double row bearing with separate inner ring.

The conventional method for filling lubricating grease in double-row bearings with separate inner rings is similar to the method for filling lubricating grease in single-row radial ball bearings. Lubricating grease was filled using a grease filling jig.

However, since the width of a double-row bearing with a separated inner ring is larger than that of a simple bearing with the same inner diameter or outer diameter, even if a certain amount of lubricating grease is filled into the grease pocket from one side, The lubricating grease is unevenly distributed on the sealed side of the grease pocket, and the lubricating grease is not evenly supplied to both raceway surfaces, resulting in a decrease in the lubricating performance of the bearing.
Therefore, in order to supply lubricating grease uniformly to both raceway surfaces of a double-row bearing, a predetermined amount of lubricating grease 112 is filled from one side, and the remaining 112
However, when using one grease filling jig to fill the specified amount of lubricating grease in two batches from one side, There is a drawback that work efficiency is poor, and when the grease is filled from both sides simultaneously, the grease filling jig and its device become complicated, resulting in poor workability and an increase in the cost of the device. This invention is intended to solve the above-mentioned drawbacks, and is directed to an inner ring/separable double row bearing having one double row outer ring and two inner rings. By sealing a certain amount of lubricating grease into the grease pocket formed between the inner ring and the outer surface of the inner ring from the inside surface of the inner ring using a grease filling jig, workability and efficiency are improved, and the lubricating grease is sealed in a good condition. An object of the present invention is to obtain a method for filling lubricating grease in a double-row bearing with separate inner ring, which is capable of improving the lubrication performance of the bearing.

An embodiment of the present invention will be described below based on the drawings. 1 is a double-row angular contact type double-row bearing with separated inner rings. It is assembled with a rolling element 5 and two sets of cages 6 and 7 that hold the rolling element 5.

The front faces 8, 9 of each inner ring 3, 4 face each other and are adjacent to each other. The inner surface 10 of the double-row outer ring 2 and the outer surface 11 of each inner ring 3, 4,
A grease pocket portion 13 is formed between the portions 12 . The inner ring separated type double row bearing 1 is formed such that the intersection point 16 of the two load action lines 14 and 15 of the rolling elements 5 is outside the pitch circle 17 of the rolling elements 5, and each inner ring 3 and 4 is vessel 6
, 7, and the inner rings 3, 4 can be separated from the assembly of the rolling elements 5 and the double-row outer ring 2, which are held by the inner rings 3, 4. The inner rings 3 and 4 can be moved to the side in the axial direction of the inner rings 3 and 4, respectively. 20 is a grease filling jig, and the grease filling jig 20 includes a cylindrical insertion portion 23 that fits into the inner surfaces 21 and 22 of the inner rings 3 and 4, and a stepped portion that supports the back surface 19 of the lower inner ring 4 in the figure. It has 24.

A non-penetrating grease supply hole 25 is provided in the axial center of the grease filling jig 20, and an annular groove 26 having a concave groove cross section is formed on the outer surface of the insertion portion 23, and the annular groove 26 is equidistantly spaced on the circumference. A plurality of small holes 27 communicating from the annular groove 26 to the grease supply hole 25 are provided in the annular groove 26 . The position of the annular groove 26 is such that the insertion portion 2 is placed on the inner surfaces 21 and 22 of the inner rings 3 and 4 so that the back surface 19 of the inner ring 4 comes into contact with the stepped portion 24 of the grease filling jig.
3 is inserted, the center position of the width of the annular miso 26 almost coincides with the extension plane of the front face 9 of the inner ring 4, and each of the inner rings 3 and 4 is inserted within the groove width of the annular groove 26. The chamfers 28 and 29 on the front faces 8 and 9 of the can be positioned. 30 is a stopper, stopper 30
There is a minute gap between the tip of the inner ring 3 and the back surface 18 of the upper inner ring 3.

To fill the inner ring separated type double row bearing 1 with lubricating grease,
First, insert the insertion part 23 of the grease filling jig into the inner surfaces 21 and 22 of the inner rings 3 and 4, and then The back surface 19 is brought into contact with the stepped portion 24 of the grease filling jig.

Next, lubricating grease is supplied under pressure from a sliding grease supply device (not shown) to the grease supply hole 25, and reaches the annular groove 26 through a small hole 27 provided in the insertion portion 23. The lubricating grease supplied to the annular groove 263 pressurizes the chamfered surfaces 28 and 29 on the front side of each inner ring 3 and 4,
The lower inner ring 4 does not move in the axial direction of the inner ring 4 because the back surface 19 of the inner ring 4 is in contact with the stepped portion 24 of the insertion portion. However, the upper inner ring 3 is pushed up in the axial direction of the inner ring 3 by the pressing force of the lubricating grease that presses the chamfered surface 28 on the front side of the inner ring 3, and the back surface 18 of the inner ring 3 is pressed against the tip of the stopper 30. Move until they come into contact, and the facing front faces 8 of the inner rings 3 and 4,
A minute gap between 9 is generated. An annular groove 26 is formed between the opposing front faces 8 and 9 of the inner rings 3 and 4 through the minute gap created.
The lubricating grease that has reached this point is supplied to the grease pocket portion 13, and a predetermined amount of lubricating grease is sealed inside the inner ring separated type double row bearing 1. As described above, the lubricating grease filling method for the inner ring separated type double row bearing of this invention is as follows:
In a double-row bearing with separate inner rings having two double-row outer rings and two inner rings, the grease pocket formed between the inner surface of the double-row outer ring and the outer surface of the inner ring is applied to the inner surface of the inner ring through the gap between the adjacent opposing front surfaces of the inner ring. By filling the saw amount of lubricating grease from the side with the grease filling jig, the lubricating grease can be filled in one time using the grease filling jig, which has a simple structure, improving work efficiency. Since the lubricating grease does not adhere to the bearing, workability is good, and since the lubricating grease is not unevenly distributed within the grease pocket, it has the effect of improving the lubricating performance of the bearing.

[Brief explanation of the drawing]

The drawing is a longitudinal cross-sectional view of a separated inner ring double row bearing and a grease filling jig, showing an embodiment of a method for filling lubricating grease into a separated inner ring double row bearing according to the present invention. 1... Separate inner ring double row bearing, 2... Double row outer ring, 3, 4... Inner ring, 8, 9... Front of inner ring, 10... ...outer surface of double row outer ring, 11, 12.
... Outer surface of inner ring, 13 ... Grease pocket part, 20 ... Grease filling jig, 21, 22.
...The inside of the inner circle.

Claims (1)

[Claims] 1. Grease formed between the inner surface of the double-row outer ring and the outer surface of the inner ring through a gap between adjacent opposing front surfaces of the inner ring in a double-row bearing with separated inner rings having one double-row outer ring and two inner rings. A method for filling a lubricating grease in a separated inner ring type double row bearing, in which a certain amount of lubricating grease is sealed into a pocket portion from the inner surface side of the inner ring using a grease filling jig.