JP2000065080A - Rolling bearing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve simple sealing of a filling port in a rolling ring of a rolling bearing by a stopper. SOLUTION: This rolling bearing is composed of two axially arranged rolling rings, and a rolling element is rolled on a rolling path between the rolling rings. In this case, both rolling rings are not divided, a filling port 4 capable of being closed by a stopper 3 is provided on one part of the periphery of one of rolling rings, and a seal means is arranged between the filling port and the stopper. The stopper 3 is composed of a base body 5 and a pressure fitting plate 6 which are separably connected to each other, and the seal means is arranged between the base body 5 and the pressure fitting plate 6. Therefore, the two-divided stoppers can reliably seal the filling port regardless of their positions in the filling port, and simultaneously, handling is easy.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rolling bearing, comprising two rolling wheels arranged coaxially with each other.
A rolling element rolls on an attached rolling path between the rolling wheels, in which case both rolling wheels are implemented inseparably, and one of the two rolling wheels is used. Has a filling port which can be closed by a stopper at one place around, and a sealing means is arranged between the filling port and the stopper.

[0002]

2. Description of the Related Art Rolling bearings of this kind are already known from EP 0811777 A1. The outer ring of the swivel described therein has a filling port which is closed by a stopper. The closure is stepped or cylindrical or conical and has a sealing ring which is arranged between the outer periphery of the closure and the wall of the filling port. The sealing ring is compressed by pushing a stopper into the filling port and thus serves for sealing. The end position of the stopper in the filling port is
It is obtained when the axial holes provided in the outer race and the axial holes provided in the filling plug coincide with one another, so that a cotter can be inserted. The disadvantage here is that the sealing action depends on the respective position of the plug in the filling opening.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to improve a simple sealing of a filling port in a rolling wheel of a rolling bearing by a plug.

[0004]

According to the present invention, the above object is attained by a plug according to the present invention, wherein the stopper comprises a base and a pressure plate which are detachably connected to each other, and This is solved by providing the sealing means between the base and the pressure plate.

[0005]

As the crimping plate and the base body move against each other via the fixing screw, the sealing means arranged therebetween is pressed outwardly to the wall of the filling port, and This is to help ensure a secure sealing of the filling opening. As a result, the sealing function of the plug does not depend on its position in the filling opening, so that the mounting and dismounting of the plug is also considerably easier.

According to the second aspect, the pressure bonding plate has a notch, and an O-ring is arranged in the notch.

Another aspect of the present invention based on claim 3 is as follows.
According to a configuration, the plug is penetrated in the region of the base body by a conical pin, which at each end has an O-ring arranged in a groove.

[0008] The conical pin fixes a predetermined position of the plug in the filling port. Furthermore, the conical pin can be easily removed from the through hole by being conical. The device is completely sealed from the outside by O-rings located in the grooves at both ends.

Another type of positioning of the stopper in the filling port results from claim 4. According to this, the plug can be positioned in the region of the base via a pin which projects axially into the base via one of the rolling wheels.

This locating pin is removed from the hole to be closed, preferably by a plastic stopper, after the final positioning of the stopper. However, the locating pin may also be left in its original position, ie in the hole. However, if the plug is positioned in the filling opening via the rolling elements of the rolling path, the fixing holes can be omitted entirely.

Another type of sealing of the stopper in the filling port results from claim 5. According to this, the base body has a gap in a part of the peripheral surface following the pressure bonding plate, and the sleeve is arranged in the gap. This reduces the space available for receiving the separating sleeve as the crimping plate moves toward the substrate by tightening the fixing screw, so that the separating sleeve has to escape outwards, And this serves for a reliable seal. In this case, it is advantageous if one O-ring is arranged at each end of the sleeve in the gap at the two ends of the sleeve. The position of the plug is fixed and at the same time a very good sealing action is obtained via both O-rings by means of a crimping plate screwed on by a central fixing screw.

According to a further embodiment of the invention, the separating sleeve has an outwardly beveled extension at its end and both ends of the separating sleeve are provided. A correspondingly formed sealing ring is arranged in the gap, and the sealing ring can be made of plastic, rubber or metal. In this case, additional pressure acts outwardly on the sealing element via the inclination of the separating sleeve. Particularly in the case of metal rings, a slit is preferably provided, since this allows a slight adjustment force when the seal ring is opened.

A further embodiment of the separating sleeve is described in claim 9. According to this, the separating sleeve has an inwardly beveled extension at its end.

According to claim 10, the separating sleeve is made of an elastic material, for example rubber or polymer, or according to claim 11, made of metal, for example copper or brass.

[0015] In another embodiment, the separating sleeve has a slit. As already mentioned, this reduces the adjusting force when expanding the sleeve.

[0016] Advantageously, the plug is designed to be conical.

[0017]

BRIEF DESCRIPTION OF THE DRAWINGS The invention will now be described in more detail with reference to an illustrated embodiment.

FIG. 1 shows a swivel joint with an outer rolling wheel 1 and an inner rolling wheel 2, in which case the outer rolling wheel 1 has a filling opening 4 for the rolling elements, The filling port is closed by a stopper 3.

As can be seen from FIGS. 2 and 3, the plug 3 comprises a base 5 and a pressure plate 6 held together by fixing screws 7. The crimping plate 6 has a groove (not shown in detail) which is open outward on its peripheral surface, and an O
A ring 8 is arranged. When the fixing screw 7 is tightened, the space available for receiving the O-ring 8 is reduced, so that the O-ring has to escape axially outward and the wall of the filling port 4 Fixedly in contact with
As a result, reliable sealing of the filling port 4 is realized.

According to FIG. 2, the positioning of the plug 3 in the filling opening 4 is effected by means of a conical pin 9 which penetrates the base 5 over its entire axial extent. In order to seal the conical pin 9, the conical pin is also provided with a groove at each end thereof, and one O-ring 10, 11 in each of these grooves.
Is arranged. Unlike the case of FIG. 2, the plug 3 of FIG. 3 is positioned via the outer rolling wheel 1 in the region of the base 5 by a safety pin 12 partially inserted in the plug 3.

According to FIG. 4, the plug 3 has a gap in the area of the base 5 following the pressure plate 6, and a sleeve 13 is arranged in the gap. This separation sleeve 13
Two O-rings 14, 15 are also disposed in the gap on the right and left of the. When the pressing plate 6 is moved from the fixing screw 7 toward the base 5, both the O-rings 14,
Pressure is applied to 15 and a sealing action is thereby obtained.

As can be seen from FIG. 5, the separating sleeve 13 has an extension which is chamfered outwardly, that is, it is shaped like a roof in longitudinal section. Seal ring 1
In this embodiment, 6, 17 are formed so as to have a larger radial extent on the outer periphery than on the inner periphery thereof.
In short, it is shaped like an inverted trapezoid when viewed in vertical section. This presupposes that the crimping plate 6 also has an inclined part adapted thereto. The same applies for the inclination of the notch in the region of the substrate 5. As the crimping plate 6 moves toward the base 5, the seal rings 16, 17 escape towards the wall of the filling port 4 and are compressed to ensure a seal. The advantage here is, in particular, that an additional pressure is generated outwardly due to the presence of the slope. In that case, the sealing rings 16, 17 can optionally also be made of plastic, rubber, or steel or other metals. For metal rings, it is advantageous to provide a slit in this. The positioning of the plug 3 in the filling opening 4 is again effected by means of the aforementioned safety pins 12.

In contrast to FIG. 5, according to FIG.
3 has an inwardly chamfered extension at its end, that is, its spread is greater on its outer peripheral surface than on its inner peripheral surface. Once again, when the crimping plate 6 is moved towards the base 5, the separating sleeve 13 expands and serves for the desired sealing.

[Brief description of the drawings]

FIG. 1 shows a perspective view of a swivel joint.

FIG. 2 is a view showing a sealing of a filling port by an O-ring according to an embodiment of the present invention.

FIG. 3 is a diagram showing a sealing of a filling port by an O-ring according to an embodiment of the present invention.

FIG. 4 is a view showing a sealing of a filling port by a sleeve according to an embodiment of the present invention;

FIG. 5 is a view showing a sealing of a filling port by a sleeve according to an embodiment of the present invention;

FIG. 6 is a diagram illustrating a sealing of a filling port by a sleeve according to an embodiment of the present invention.

[Explanation of symbols]

1 outer rolling wheel, 2 inner rolling wheel, 3 stopper,
4 Filling port, 5 Base, 6 Crimping plate, 7 Fixing screw, 8 O-ring, 9 Conical pin, 10, 11
O-ring, 12 (safety) pin, 13 Separation sleeve, 14, 15 O-ring, 16, 17 Seal ring

Claims (13)

[Claims] 1. A rolling bearing, comprising two rolling wheels (1, 2) arranged coaxially with each other, between which rolling elements a rolling element rolls on an attached rolling path. In this case, both rolling wheels (1, 2) are inseparably implemented, and either one of the two rolling wheels (1, 2) is plugged at one location around. (3) a type having a filling port (4) that can be closed by (3) and a sealing means disposed between the filling port (4) and the plug (3); Comprises a substrate (5) and a pressure bonding plate (6) detachably connected to each other, and
A rolling bearing, characterized in that sealing means (8, 13, 14, 15, 16, 17) are arranged between the base (5) and the pressure plate (6). 2. The rolling bearing according to claim 1, wherein the pressure plate has a notch, and an O-ring is arranged in the notch. 3. A plug (3) is pierced in the area of the base body (5) by a conical pin (9), at each end of which a single O-ring (10, 10) is arranged in a groove.
The rolling bearing according to claim 1, wherein the rolling bearing comprises: 11). 4. A pin (12) in which a plug (3) partially protrudes axially into the base (5) via one of the rolling wheels (1, 2) in the region of the base (5). 2. The rolling bearing according to claim 1, wherein the rolling bearing can be positioned by: 5. The base body (5) has a gap on a part of its peripheral surface following the pressure bonding plate (6), and the sleeve (13) is arranged in the gap. Rolling bearing. 6. The rolling bearing according to claim 5, wherein one O-ring (14, 15) is disposed at each end of the sleeve (13) in the gap. 7. The separating sleeve (13) has an extension which is beveled outward at its end and is molded in the gap at the opposite ends of the separating sleeve (13). Rolling bearing according to claim 5, wherein a sealing ring (16, 17) is arranged. 8. Rolling bearing according to claim 7, wherein the sealing rings (16, 17) are made of plastic, rubber or metal and optionally have slits. 9. Rolling bearing according to claim 5, wherein the separating sleeve (13) has an inwardly chamfered extension at its end. 10. The rolling bearing according to claim 5, wherein the separating sleeve (13) is made of an elastic material, for example, rubber or polymer. 11. The rolling bearing according to claim 5, wherein the separating sleeve (13) is made of a metal such as copper or brass. 12. The rolling bearing according to claim 5, wherein the separating sleeve has a slit. 13. The rolling bearing according to claim 1, wherein the plug (3) has a conical shape.