JPH073059Y2 - Resin roller bearing integrally molded with metal bush, and chain incorporating the bearing - Google Patents

Description

TECHNICAL FIELD The present invention relates to a roller bearing, and further to a chain incorporating the bearing.

BACKGROUND ART There are various types of roller bearings. The present invention is directed to a cylindrical roller bearing having an inner ring and / or an outer ring having a collar on at least one side, or a needle roller bearing.

Such a bearing can also bear a thrust load, and a typical example thereof is a so-called solid type. This bearing has an outer ring with both collars and a plurality of rolling elements mounted on the rolling surface, that is, cylindrical rollers. Some cages are included depending on the intended use.

However, in the above bearing, since the roller and the flange are in sliding contact, at least this portion must be lubricated to prevent seizure or the like. Further, although it is difficult to polish the inside of the collar, it is expensive to perform the polishing.

Further, in the bearing with a collar, it is difficult to efficiently perform rolling surface machining, that is, cutting, polishing, and superfinishing due to the presence of the collar. It may be possible to manufacture the inner ring and the outer ring from a resin that can be integrally molded, but in terms of strength, they are not comparable to those made of metal, and there is a problem that they are not suitable for high load applications.

MEANS FOR SOLVING THE PROBLEMS AND ACTION The present invention relates to a bearing using rollers as rolling elements, in which the inner ring and / or the outer ring having a collar is formed of a resin having self-lubricating property, and The problem is solved by integrally forming a metal bush on the rolling surface and by arranging the end surfaces of the rollers to face the inside of the collar.

With the above configuration, it is possible to provide a bearing that does not require lubrication inside the collar, can withstand a high load, and can be easily processed.

That is, inside the flange, the rollers and the inner ring and / or the outer ring are made of different materials, so that by molding the inner ring and / or the outer ring with a self-lubricating resin, lubrication in this part is not necessary. Further, the bush is made of metal and integrally formed on the roller rolling surfaces of the inner ring and / or the outer ring to provide a bearing having a rated load comparable to that of a conventional bearing and easy to machine the rolling surface. be able to.

The metal bush is mainly manufactured by cutting, and the same surface roughness as that of the conventional one can be obtained by barrel polishing or the like. Further, even if the inner surface is polished, the processing is easy because there is no flange on both sides.

The present invention also provides a chain incorporating the bearing as described above. Generally, the chain is often used under the condition of no lubrication, and when the bearing is incorporated in the chain, it must be lubricated with grease or the like. for that reason,
A sealing means such as a seal is required.

Therefore, by applying the bearing of the present invention to a chain, it is possible to provide a chain that does not require grease or sealing means even in an atmosphere where oil cannot be supplied. Specifically, a chain in which the above-mentioned bearing having a double brim type outer ring and a rolling element loaded in the outer ring is attached around a connecting pin connecting the link plates is suitable.

Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

The bearing 10 according to the present invention, as shown in FIG.
An outer ring 14 with a rolling element loaded in the outer ring 14,
That is, it has rollers 16. The outer ring 14 is made of a self-lubricating material. A hardened cylindrical metal bush 18 is integrally formed on the rolling surface of the outer ring 14. Such a bearing 10 has a metal bush 18 and an outer ring.
It is manufactured by integrally molding a resin that becomes 14.
The cage 20 slides on the inner peripheral surface 22 of the collar.

The form of the bearing of the present invention is not limited to the embodiment shown in FIG. For example, as shown in FIG. 2, the inner ring 24 has two collars.
It may be a bearing having 26, 26 and an outer ring 28 having a single collar 30. The inner ring 24 and the outer ring 28 have cylindrical metal bushes 32, 34 integrally formed on their rolling surfaces.

Next, FIGS. 3 and 4 show an example in which the above bearing is applied to a chain. In particular, the chain is often used in an unlubricated atmosphere, such as in the food manufacturing process. Therefore, there are cases where the grease must be used for lubrication. However, when grease is used, sealing means is required.

Therefore, by applying the bearing as described above, it is possible to obtain a chain that does not require lubrication and lubrication. The chain 36 of this embodiment has an inner link plate 44 having a bush 42 on a connecting pin 40 passing through a pair of outer link plates 38.
And a bearing 50 is mounted around the bush 42, so that a chain that does not require lubrication and lubrication can be obtained. This bearing 50 is composed of an outer ring 54 with two collars and an outer ring 54.
It comprises rolling elements, i.e. rollers 56, loaded in 54. A cylindrical metal bush is attached to the roller rolling surface of the outer ring 54.
58 is integrally molded. Reference numeral 46 is a spacer that regulates the lateral position of the bearing 50.

The chain 50 of the present embodiment does not need to be refueled, and can be used in a durability comparable to that of a conventional metal chain. Since it is manufactured, the noise is low.

Next, FIGS. 5 and 6 show an embodiment in which the bearing as described above is used in the traveling portion of the slat conveyor 70.
The slat conveyor 70 is also often used without oil, and the bearing mounted on the slat 72 must be lubricated by some means, such as grease. However, by applying the bearing of the present invention to the running portion of the slat 72, it is possible to obtain the slat conveyor 70 that does not require refueling and can withstand a high load.

As shown in FIG. 5, the bearing 60 in this case includes a shaft 61 which is an inner ring, an outer ring 64 integrally formed with a bush 68, and a roller 66.
And has a spacer 67. This bearing 60 has a nut 74
And attached to slats 72 by washers 76. The spacer 67 is for restricting the lateral position of the outer ring 64. Even when a heavy load is loaded on the slat 72, the bearing 60 of this embodiment has durability against this heavy load,
The slats 72 can be run quietly.

EFFECTS OF THE INVENTION The bearing of the present invention, having the above-mentioned configuration, has a durability equivalent to that of the conventional bearing, and can be used even without lubrication or lubrication. In addition, the inner ring and the outer ring have good surface roughness on the inner side of the collar even if they are not mechanically processed, and bearings with complicated shapes, such as bearings with a flange on the outer ring, can be easily formed. it can.

Further, since the resin forming the inner and outer rings is exposed inside the flange, the attribute of the resin having self-lubricating property can be utilized in the portion that makes sliding contact with the rollers.

Further, the chain of claim 2 can be used even under the condition of no lubrication and no lubrication, can withstand a high load, and generate little noise because the loading surface is made of resin. Further, since the bearing can be manufactured at a low price without requiring a sealing means such as a seal, the cost can be reduced as a whole.

[Brief description of drawings]

FIG. 1 is an axial sectional view of a bearing according to an embodiment of the present invention, FIG. 2 is an axial sectional view of a bearing according to another embodiment, and FIG.
FIG. 4 is an exploded perspective view of a chain applying the bearing of FIG. 4, FIG. 4 is a perspective view of the chain of FIG. 3 after assembly, and FIG. 5 is an axial sectional view of a bearing according to another embodiment of the present invention. FIG. 6 is a front view of a slat conveyor using the bearing of FIG. 5. 10,50,60… Bearing 12,26,30… Bill 14,28,54,64… Outer ring 16,56,66… Roller 18,32,34,58,68… Bush 24,61, Inner ring, 30… Chain

Claims (2)

[Scope of utility model registration request] 1. A bearing using rollers as rolling elements, comprising:
The inner ring and / or outer ring having a collar is formed of a resin having self-lubricating properties, and a metal bush is integrally formed on the roller rolling surface of the inner ring and / or the outer ring, and the end face of the roller is formed inside the collar. A roller bearing characterized by being opposed to each other. 2. A chain comprising the resin bearing according to claim 1, which has a double collar type outer ring, mounted around a connecting pin connecting link plates to each other.