JPH02234892A - Intermediate bush for fixing bearing in housing - Google Patents

Abstract

PURPOSE: To facilitate the push-out of a bearing in a housing by a pushing device by a method wherein a breakable spot is formed in a flange and through breakage of this spot, a part of the flange is removed, in a device to cover the end face of a tubular housing with the flange of an intermediate bush. CONSTITUTION: In the pedal bearing device for a bicycle, longitudinal grooves 12 are formed in two positions, situated facing each other based on a diameter line, in a surface opposite to a bearing 10 and in the flange 7 of an intermediate bush 6 made of, for example, synthetic resin, pressfitted into a gap between an outer ring 4 and a housing 5, and a notch 13 having a breakable spot 13a on the extension line of the longitudinal groove 12 is formed in a surface on the bearing 10 side. During disassembly of a bearing, the flange 7 is broken in the notch 13 spot and by fitting a screw driver in the longitudinal groove 12, a segment part 14 is separated, and the end face 8 of a tubular housing part 9 is exposed. The support device 16 is arranged on the exposed surface and by pressing by a press device 17 from the opposite side, a bearing 10 is pushed out from the housing 5.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an intermediate bushing for fixing a bearing in a housing, for example in a bicycle frame, such as a bearing which abuts an end face of a tubular housing part or the like by means of a flange.

[Conventional technology]

A fixing system for rolling bearings in which an intermediate bushing is provided between the outer ring and the housing is already known from German Utility Model Registration No. 8531659. The intermediate bush flanges the end face of the tubular housing part. The flange has a perfect circular outer shape when the intermediate bush is assembled.

[Problem to be solved by the invention]

The known intermediate bush mentioned above covers all end faces of the tubular housing part with a flange having a complete circular contour. Therefore, when disassembling such a bearing, it is difficult to install a pressing device for pushing out the bearing.

The object of the invention is to provide an intermediate bush of the type mentioned at the outset,
The objective is to improve the bearing so that it can be easily disassembled. (Means and operations for solving the problem) According to the present invention, this object is achieved by: the flange of the intermediate bushing having a breakable portion; This can be achieved by setting the end face of the tubular housing part in such a position that it is exposed when the part is removed. By so forming the intermediate bushing, it is possible to attach the support device to the exposed end face of the tubular housing and to push the bearing out of the housing bore by means of a pushing device.

According to an advantageous embodiment of the invention, the breakable point is preferably located tangentially to the outer circumferential surface of the bush-like part and delimits the segment part. After the segment part has been ruptured, a very large area of the end face of the tubular housing part is thereby exposed for receiving the support device.

According to a further embodiment of the invention, the flange has a cutout forming a breakable point,
Further, the notches are provided at two locations facing the diameter line on the bearing side surface, and are positioned parallel to each other. Furthermore, the flange has, on its side facing away from the bearing, a longitudinal groove in the central region of the chord of the segment, which extends in the direction of this chord.

This allows you to fit a tool, such as a screwdriver, into the longitudinal groove.
Segment parts can be broken.

Furthermore, the flange is provided with a recess on the side facing the bearing, which emanates from the outer circumferential surface of the flange and extends perpendicularly to the chord of the segment. A screwdriver can be inserted into this recess in order to break off the segment parts.

〔Example〕

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

FIG. 1 shows a bicycle pedal bearing device as an embodiment of the present invention. This bearing device consists of a shaft 1 having a guide raceway 2 for balls 3, an outer ring 4, and an intermediate bush 6, made of, for example, synthetic resin, press-fitted between the outer ring 4 and a housing 5. This intermediate bushing 6 has a flange 7 with which it rests on the end face of the tubular housing part 9 of the housing 5.

Flange 7 of intermediate bushing 6 shown in FIGS. 1 to 6
is provided with longitudinal grooves 12 that extend parallel to each other in a tangential direction to the outer circumferential surface l1 of the bush-like portion 11a at two locations opposite to the diameter line on the surface opposite to the bearing 10. Furthermore, the flange 7 has a notch 13 on the surface facing the bearing 10, which forms a breakable portion 13a on an extension of the longitudinal groove 12.

When disassembling the bearing 10, the segment portion 14 (see FIG. 6) of the flange 7 is broken off at its notch 13. For this purpose, a screwdriver or the like is inserted into the longitudinal groove 12 and the segment parts 14 are separated. A support device 16 (see FIG. 1) is thus placed on the exposed surface 15 of the end face 8 of the tubular housing part 9, and the bearing 10 is pushed out of the housing 5 by a pushing device 17 from the opposite side.

The flange 7 of the intermediate bush 6 as another embodiment shown in FIG. 7 has a notch 13 on the surface on the bearing lO side,
The chord 19 of the segment portion 14 emanating from its outer circumferential surface 18
It has a recess 20 extending perpendicularly thereto. When breaking the segment portion 14, a screwdriver is inserted into the recess 20.

The invention is not limited to the embodiments described above.

The structure of the intermediate bushing can be easily modified within the scope of the invention. That is, for example, it is also possible to provide three or more segment parts around the circumference of the flange and to break these segments before disassembling the bearing.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a bicycle bearing device equipped with an intermediate bushing as an embodiment of the present invention, FIG. 2 is an enlarged sectional view of the intermediate bushing in FIG. 1, and FIG. 3 is an intermediate bushing in FIG. 2. 4 is a sectional view taken along line AA in FIG. 3, FIG. 5 is a sectional view taken along line BB in FIG. 3, and FIG. 6 is a sectional view taken along line BB in FIG. A side view of the intermediate bush in FIG.
The figure is a partial sectional view of an intermediate bushing according to another embodiment of the present invention. 5...Housing 7...Flange 8...End face of housing part 9...
...Housing part 10...Bearing 11...Outer peripheral surface 11a of bushing part.
... Bush-like portion 12 ... Longitudinal groove l3 ... Notch 13a ... Breakable point 14 ... ...Segment part 19...
...String 20 of the segment part ...... Concave Patent Applicant SKA F GmbH Date 9.2

Claims (6)

[Claims] (1) In an intermediate bush for fixing a bearing in a housing, for example, a bicycle frame, such that the flange contacts the end face of a tubular housing part, the flange (7) has a breakable portion (13a),
The breakable portion is such that when the breakable portion (13a) is broken and a portion (14) of the flange (7) is removed, the end surface (8) of the tubular housing portion (9) is exposed. An intermediate bushing for fixing a bearing in a housing, characterized in that the bushing is set in position. (2) The breakable part (13a) is the bush-shaped part (11
Fixing the bearing according to claim 1 in a housing, characterized in that it is located tangentially to the outer circumferential surface (11) of a) and bounds the segment part (14) of the flange (7). Intermediate bush for. (3) The flange (7) is provided with a notch (13) on the side surface of the bearing (10) to form a breakable part. Intermediate bushing for fixing the bearing in the housing. (4) Claim (3) wherein the notches (13) are provided at two locations facing the diameter line and are located parallel to each other.
) An intermediate bush for fixing the bearing in the housing. (5) The flange (7) has on its side opposite the bearing (10) a longitudinal groove (12) in the central region of the chord (19) of the segment part (14) extending in the direction of this chord (19); An intermediate bush for fixing a bearing according to any one of claims 1 to 4 in a housing. (6) The flange (7) is provided with a recess (20) on the side facing the bearing (10) starting from its outer circumferential surface (18) and extending perpendicularly to the chord (19) of the segment part (14). An intermediate bush for fixing a bearing according to any one of claims 1 to 5 in a housing.