JPH0522849U - Cylindrical roller bearing device - Google Patents

Abstract

(57) [Abstract] [Purpose] There is no problem of local increase in surface pressure due to oil holes, and workability is also excellent. [Structure] An inner ring 2 of one collar and a collar ring 3 which is separate from this are provided. A radial oil groove 8 is provided on the flange-side end surface of the inner ring 2, and an axial oil groove 9 is provided on the internal diameter surface of the flange ring 3. Axis 7
An in-shaft oil passage 11 that opens into the oil groove 9 of the collar ring 3 is provided therein. By enlarging either or both of the chamfered portion of the inner diameter portion of the inner ring 2 and the chamfered portion of the inner diameter portion of the collar ring 3, a ring shape is formed between the inner ring 2, the collar ring 3, and the shaft 7. The oil passage gap 10 is secured. The rotation of the shaft 7 causes the lubricating oil in the oil passage 11 in the shaft to be centrifugally affected by the oil groove 9 in the collar 3.
And is supplied to the vicinity of the end surface of the roller 2 through the oil passage gap 10 and the oil groove 8 of the inner ring 2.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a flanged cylindrical roller bearing device for supplying lubricating oil from an oil passage in a shaft to a bearing in a transmission for an automobile or an industrial machine.

[0002]

[Prior Art]

 In general, bearings in automobile transmissions employ a lubrication system that splashes the lubricating oil inside the transmission by the rotation of the gears, etc. Lubrication between and is not actively done. Therefore, in particular, there is a concern that heat may be generated due to the contact with the flange surface, which is a sliding contact.

Therefore, as shown in FIG. 2, a plurality of oil holes 52 are provided on the rolling surface of the bearing inner ring 51, and an oil passage 54 in the shaft 53 is communicated with each oil hole 52 by a circumferential groove 55. A method of supplying lubricating oil from the inside of the shaft 53 by centrifugal force may be adopted. This method is used in combination with the bouncing method.

[0004]

[Problems to be solved by the device]

 However, since the lubricating oil is supplied to the rolling surface of the inner ring 51, the rolling surface including the oil hole 52 receives the load in a usage mode such as a transmission in which a rotational load acts on the inner ring 51 side. A local increase in the contact surface pressure occurs around 52, which may cause a problem such as durability. Further, it is difficult to machine the small-diameter oil hole 52 in the inner ring 51, and therefore the productivity is poor.

An object of the present invention is to provide a cylindrical roller bearing device which is free from the problem of local increase in surface pressure and has excellent workability.

[0006]

[Means for Solving the Problems]

 The cylindrical roller bearing device of the present invention is applied to a double collar type bearing having an inner ring of one collar and a collar ring separate from the inner ring. In such a bearing, a radial oil groove is provided on the end face of the inner ring, and a ring-shaped oil passage gap is provided between the chamfered portion of the inner diameter end face of the inner ring, the collar ring, and the shaft. The shaft is fitted to the inner ring and the collar ring, and an inner-side oil passage that opens to the inner diameter surface of the collar ring and the outer diameter surface of the shaft within the oil passage gap is provided therein.

According to a second aspect of the present invention, in the cylindrical roller bearing device of the first aspect, an axial oil groove is provided on the inner diameter surface of the collar ring, and an oil passage in the shaft is opened in this oil groove.

[0008]

[Action]

 With this configuration, the lubricating oil in the oil passage in the shaft flows through the oil passage gap formed between the inner ring, the collar ring, and the shaft into the oil groove in the radial direction on the end surface of the inner ring, and from this oil groove to the rollers. Supplied around the. Since there are no oil holes on the rolling surface of the inner ring, there is no problem of local increase in surface pressure.

In the case of the second aspect, the lubricating oil in the in-shaft oil passage is supplied to the oil passage gap from the oil groove on the inner diameter surface of the collar ring. Since the oil passage gap is formed in a ring shape, lubricating oil is supplied even if the circumferential positions of the oil groove of the collar and the oil groove of the inner ring are offset from each other.

[0010]

【Example】

 An embodiment of this invention will be described with reference to FIG. This cylindrical roller bearing device is provided with an outer ring 1 of both collars, an inner ring 2 of one collar, and a collar ring 3 provided separately from the inner ring 2 in contact with the end surface of the inner ring 2 on the side without a collar. A roller 5 held by a cage 4 is interposed between Nos. 2 and 1. A mating member 6 such as a spacer or a gear is provided on the outer periphery of the shaft 7 adjacent to the collar ring 3.

The inner ring 2 has radial oil grooves 8 formed at a plurality of circumferential positions on the end face on the side of the collar ring 3. The collar ring 3 has axial oil grooves 9 formed in a plurality of circumferential positions on the inner diameter surface, and chamfers are applied to both ends of the inner diameter surface. One or both of the chamfered portion on the inner diameter surface of the inner ring 2 and the chamfered portion on the inner diameter surface of the collar ring 3 are formed to be large, and between the inner ring 2, the collar ring 3, and the shaft 7. A ring-shaped oil passage gap 10 is secured.

Inside the shaft 7, an in-shaft oil passage 11 including an axial passage portion 11 a and a plurality of radial radial passage portions 11 b is provided, and each radial passage portion 11 b is connected to each oil of the collar 3. It is opened to the groove 9. The oil groove 9 and the radial passage portion 11b may each be one. The supply end of the in-shaft oil passage 11 is directly connected to the lubricating oil tank, or via a pump.

According to this configuration, the rotation of the shaft 7 causes the lubricating oil in the in-shaft oil passage 11 to reach the inner diameter surface of the collar ring 3 from the radial passage portion 11b by centrifugal force. This lubricating oil flows through the oil groove 9 of the collar ring 3, flows through the oil passage gap 10 formed between the inner ring 2, the collar ring 3, and the shaft 7, and then from the oil groove 8 on the end surface of the inner ring 2 to the bearing. Supplied within. Since the oil passage gap 10 is formed in a ring shape, even if the circumferential positions of the oil groove 9 of the collar ring 3 and the oil groove 8 of the inner ring 2 are deviated, the lubricating oil flow in the aforementioned path can be obtained. ..

In this cylindrical roller bearing device, since the lubricating oil is supplied from the oil groove 8 on the end surface of the inner ring 2 as described above, no oil hole or the like is required on the rolling surface of the inner ring 2 and the local surface pressure is not required. There is no problem of increase of, and the durability is good. Moreover, the inner ring 2 and the like do not need to be drilled, and only the oil grooves 8 and 9 need to be processed, so that workability is also good.

Although the collar 3 is provided with the oil groove 9 in the above embodiment, the oil groove 9 may not necessarily be provided, and the in-shaft oil passage 11 may be opened in the oil passage gap 10. .. Further, without providing the oil groove 9 in the collar ring 3, the in-shaft oil passage 11 is opened to the inner diameter surface of the collar ring 3, and the lubricating oil is supplied from the gap between the inner diameter surface and the shaft 7 to the oil passage gap 10. May be supplied.

[0016]

EFFECTS OF THE INVENTION The cylindrical roller bearing device of the present invention provides a radial oil groove on the end face of the inner ring on the side of the collar ring, and forms a ring-shaped oil passage gap between the inner ring, the collar ring, and the shaft. However, since the lubricating oil is supplied from the in-shaft oil passage through the oil groove on the end face of the inner ring, there is no need for oil holes on the rolling surface, there is no problem of local increase in surface pressure, and durability is improved. good. Moreover, since it is not necessary to form holes in the inner ring and the like and only groove formation is required, there is an effect that workability is also good.

[Brief description of drawings]

FIG. 1 is a partial sectional view of an embodiment of the present invention.

FIG. 2 is a partial cross-sectional view of a conventional example.

[Explanation of symbols]

1 ... Outer ring, 2 ... Inner ring, 3 ... Collar ring, 5 ... Roller, 7 ... Shaft,
8, 9 ... Oil groove, 10 ... Oil passage gap, 11 ... In-shaft oil passage

Claims (2)

[Scope of utility model registration request] 1. A collar ring is provided in contact with an end face of the inner ring of one collar that does not have a collar, and a radial oil groove is provided on the end face of the inner ring. A ring-shaped oil passage gap is provided between the ring and the shaft fitted to the inner ring and the collar ring, and the shaft is off-axis within the inner diameter surface of the collar ring and the oil passage gap within the shaft. A cylindrical roller bearing device provided with an in-shaft oil passage opening on the radial surface. 2. The cylindrical roller bearing device according to claim 1, wherein an axial oil groove is provided on the inner diameter surface of the collar ring, and an oil passage in the shaft is opened in this oil groove.