JPH072636U - Split type rolling bearing - Google Patents

Abstract

(57) [Summary] [Purpose] To increase the rigidity of rolling bearings whose outer and inner rings are divided in the circumferential direction. [Structure] An outer ring 1 and an inner ring 2 are divided along a plane including an axis to provide a plurality of outer ring segments 1a and 1b and a plurality of inner ring segments 2a and 2b. A pair of fastening plates 11 and 21 are overlapped and fastened to both side surfaces of the outer ring segments 1a and 1b at the abutting portions and both side surfaces of the inner ring segments 2a and 2b to hold the outer ring 1 and the inner ring 2 in a circular assembled state. To do. The ends of the connecting plates 17 and 27 are bolted to the outer diameter surface of the abutting ends of the outer ring segments 1a and 1b and the inner diameter surface of the abutting ends of the inner ring segments 2a and 2b to connect the axial loads acting on the rolling bearings. The plates 17 and 27 support the outer ring 1 and the inner ring 2 to prevent the outer ring segments 1a and 1b and the inner ring segments 2a and 2b from being deformed at the abutting surfaces.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a split type rolling bearing in which rolling elements are incorporated between an outer ring and an inner ring.

[0002]

[Prior art]

 In general, rolling bearings installed in large industrial machines receive extremely large axial loads, so deep groove ball bearings with rolling elements installed between the raceways of the outer and inner rings are used. This rolling bearing has a very large bearing inner diameter and is difficult to transport and assemble as it is.Therefore, the outer ring and the inner ring are divided by a plane along the axis to facilitate transportation and assembly. There is.

In the above-mentioned rolling bearing in which the bearing ring is divided, the fastening plate is bolted to hold the outer ring and the inner ring in a circular assembled state.

[0004]

[Problems to be solved by the device]

 By the way, in conventional rolling bearings, a pair of fastening plates are laid on both sides of the outer ring split and both sides of the inner ring split, and a pair of axially opposed fastening plates are bolted to tighten the outer ring and Since the inner ring is held in a circular assembled state, when a large axial load is applied to the rolling bearing, the fastening plate deforms in the thickness direction and the raceway groove for guiding the movement of the rolling elements is located at the split position of the outer ring and the inner ring. There is a problem that the rolling movement of rolling elements is hindered and the rolling resistance increases.

An object of the present invention is to solve the above-mentioned problems and to provide a rolling bearing with high rigidity in which the outer ring and the inner ring are less likely to be deformed at the split positions.

[0006]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, in the present invention, a pair of fastening plates are superposed on both side surfaces of the abutting portion of the outer ring segment and both side surfaces of the abutting portion of the inner ring segment, and the pair of fastening plates are fastened to each other. In a rolling bearing in which the plates are fastened to hold the outer ring and the inner ring in a circular assembled state, connecting plates are attached to the outer diameter surface at the butted portion of the outer ring segment and the inner diameter surface at the butted portion of the inner ring segment. The structure is such that they are overlapped and both ends of each connecting plate are fastened to the outer ring segment and the inner ring segment.

[0007]

[Action]

 With the above configuration, when the rolling bearing receives an axial load, the axial load acts on each of the fastening plate and the connecting plate that connect the outer ring segments and the inner ring segments. At this time, since the axial load acting on the connecting plate is in the width direction, the connecting plate is less likely to be deformed, and the outer ring and the inner ring are held in a circular assembled state.

[0008]

【Example】

 An embodiment of the present invention will be described below with reference to the accompanying drawings.

As shown in the figure, the rolling bearing according to the present invention has an outer ring 1 and an inner ring 2, and raceway grooves 3 and 4 are formed in an inner diameter surface of the outer ring 1 and an outer diameter surface of the inner ring 2, respectively. A rolling element 5 is incorporated between the raceway grooves 3, 4.

Seal grooves 6 and 7 are formed at one end on the inner diameter surface of the outer ring 1 and the other end on the outer diameter surface of the inner ring 2, and seals 8 and 9 are attached to the seal grooves 6 and 7, respectively. . The inner diameter portion of the seal 8 attached to the seal groove 6 of the outer ring 1 contacts one side surface of the inner ring 2, while the outer diameter portion of the seal 9 attached to the seal groove 7 of the inner ring 2 is attached to the other side surface of the outer ring 1. This prevents dust, water, and the like from coming into contact with the two wheels 1 and 2 and coming into contact with each other.

Here, a rust preventive treatment, for example, a plating film such as chrome plating may be formed on the outer circumferences of the outer race 1 and the inner race 2 except the surfaces having the raceway grooves 3, 4.

The outer ring 1 and the inner ring 2 are divided into two along a plane including the axis, and a pair of outer ring segments 1a and 1b and a pair of inner ring segments 2a and 2b are formed.

A plurality of bolt insertion holes 10 penetrating both sides are formed at the abutting end portions of the pair of outer ring segments 1a, 1b. A pair of fastening plates 11 are superposed on both side surfaces of the outer ring 1 so as to straddle the abutting ends of the outer ring segments 1a and 1b. The fastening plate 11 has a plurality of holes 12 which coincide with the bolt insertion holes 10, and the pair of outer ring segments 1a and 1b are circular by tightening the bolts 13 and nuts 14 inserted into the bolt insertion holes 10 from the respective holes 12. It is held in the assembled state.

A recess 15 is formed on the outer diameter surface of the pair of outer ring segments 1a, 1b at the abutting ends, and a screw hole 16 is provided on the bottom surface of the recess 15. A connecting plate 17 is incorporated in the recess 15, and holes 18 communicating with the screw holes 16 are formed at both ends of the connecting plate 17.

The connecting plate 17 is connected to the abutting ends of the pair of outer ring segments 1a, 1b by tightening a bolt 19 screwed into the screw hole 16 from the hole 18.

On the other hand, a plurality of bolt insertion holes 20 penetrating both sides are formed at the abutting end portions of the pair of inner ring segments 2a, 2b. A pair of fastening plates 21 are superposed on both side surfaces of the inner ring 2 so as to straddle the abutting ends of the inner ring segments 2a, 2b. The fastening plate 21 has a plurality of holes 22 communicating with the bolt insertion holes 20. By tightening the bolts 23 and nuts 24 inserted into the bolt insertion holes 20 from the respective holes 22, the pair of inner ring segments 2a, 2b are separated from each other. It is held in a circular assembly.

Further, a recess 25 is formed on the inner diameter surface of the pair of inner ring segments 2a, 2b at the abutting ends, and a screw hole 26 is provided on the bottom surface of the recess 25. A connecting plate 27 is incorporated in the recess 25, and holes 28 communicating with the screw holes 26 are formed at both ends of the connecting plate 27.

The connecting plate 27 is connected to the abutting ends of the pair of inner ring segments 2a, 2b by tightening a bolt 29 screwed into the screw hole 26 from the hole 28.

As described above, when the pair of outer ring segments 1a and 1b and the pair of inner ring segments 2a and 2b are connected by the connecting plates 17 and 27 provided on the outer diameter surface of the outer ring 1 and the inner diameter surface of the inner ring 2, rolling will occur. When the bearing receives an axial load, the axial load acts in the width direction of each connecting plate 17, 27. Therefore, the connecting plates 17 and 27 are hardly deformed, and the outer ring 1 and the inner ring 2 are not bent at the abutting portions of the outer ring segments 1a and 1b and the abutting portions of the inner ring segments 2a and 2b. 5 smoothly moves along the raceway grooves 3 and 4, and the rolling resistance of the rolling bearing can be suppressed.

Reference numeral 30 in FIG. 1 denotes a screw hole for attaching the outer ring 1 and the inner ring 2.

[0021]

[Effect of device]

 As described above, in the rolling bearing according to the present invention, the connecting plate that connects the abutting end of the outer ring segment and the abutting end of the inner ring segment is provided on the outer diameter surface of the outer ring and the inner diameter surface of the inner ring. The split outer ring and the split inner ring do not deform even when the rolling bearing receives an axial load, and a rolling bearing with high rigidity can be obtained.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of a rolling bearing according to the present invention.

FIG. 2 is a plan view showing an enlarged main part of the above.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is an exploded perspective view showing an outer ring segment, a fastening plate and a connecting plate of the above.

FIG. 5 is an exploded perspective view showing an inner ring segment, a fastening plate and a connecting plate of the above.

[Explanation of symbols]

 1 Outer ring 1a, 1b Outer ring segment 2 Inner ring 2a, 2b Inner ring segment 5 Rolling element 11 Fastening plate 17 Connecting plate 21 Fastening plate 27 Connecting plate

Claims (1)

[Scope of utility model registration request] 1. An outer ring, an inner ring, and rolling elements incorporated between the two rings, wherein the outer ring and the inner ring are divided by a plane along the axis to provide a plurality of outer ring segments and a plurality of inner ring segments. A split rolling bearing in which a pair of fastening plates are overlapped on both sides of the butted portion of the segment and both sides of the butted portion of the inner ring segment, and the pair of fastening plates are fastened with bolts to connect the outer ring segments and the inner ring segments. In the above, the split type is characterized in that the connecting plate is superposed on the outer diameter surface of the abutting portion of the outer ring segment and the inner diameter surface of the abutting portion of the inner ring segment, and both ends of the connecting plate are fastened to the outer ring segment and the inner ring segment. Rolling bearing.