JPH0143536Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a bushing that is interposed between a bracket and a rotating shaft to hold the rotating shaft when the rotating shaft is rotatably supported by a bracket. It is something.

<Prior Art> When a rotating shaft is rotatably supported on a fixed part by a racket, a synthetic resin bushing is interposed between the rotating shaft and the bracket to ensure smooth rotation of the rotating shaft.

By the way, if the rotating shaft is straight, a cylindrical bushing can be fitted from the end of the rotating shaft and moved to the support position of the bracket, but as shown in Figure 1, a crank-shaped bushing with both ends bent can be used. axis of rotation 1
In this case, the cylindrical shaft-shaped bushing cannot be moved to the supporting position by passing through the bending part, so the bushing is made up of a pair of semi-cylindrical bodies made by dividing the cylindrical shaft into two in the axial direction, as shown in Figure 2. Butsuyu 2,
It was supported by brackets 3 and 4 having a mating structure and tightened with bolts 5.

In this case, since the bush is a pair of semi-cylindrical bodies that are completely separated, it is necessary to ensure that their axial positions do not deviate from each other when the brackets 3 and 4 are tightened together on the rotating shaft 1. The assembly workability was poor, and since the rotating shaft and the bushing were in full contact with each other and rotated relative to each other, frictional noises were sometimes generated.

<Purpose of the invention> An object of the invention is to provide a split bushing that can be easily and reliably assembled and positioned on a rotating shaft, and that has improved the above-mentioned conventional problems.

<Structure of the invention> The characteristic structure of the invention for achieving the above object is that a pair of semi-cylindrical bodies divided into two parts is divided by a thin connecting piece that can be bent at one or more places in the axial direction. The surfaces are connected so that they can be combined and expanded, and the connecting piece that is bent when the pair of semi-cylindrical bodies are combined protrudes in the outer radial direction to form a positioning protrusion. Furthermore, if necessary, a plurality of minute protrusions are formed along the circumferential surface of the semicircular inner circumferential surface of the bush.

<Embodiments> Examples of the present invention will be described below with reference to FIGS. 3 to 7. In FIG. 3, 2 is a bush made of synthetic resin, which is a pair of semi-cylindrical bodies obtained by dividing a cylindrical shaft into two in the axial direction. In the present invention, the pair of semi-cylindrical bushes 2 are connected by a bendable connecting piece 6 at two axial ends thereof. This connecting piece 6 is connected to the bush 2
It has a thin bent portion 7, and when the bushes 2 are combined, it protrudes radially from the outer circumferential surface with the thin bent portion 7 as the tip. Further, a plurality of minute protrusions 8 may be provided on the semicircular inner peripheral surface of the bush 2 along the circumferential surface.

Since the present invention has the above-mentioned structure, the bush 2 consisting of a pair of semi-cylindrical bodies that are always connected together by the connecting piece 6 is assembled on the rotating shaft 1 in the unfolded state, as shown in FIGS. 5 and 6. As shown in the figure, it is held by a bracket 9 and fixed to a fixed surface with a bolt 5. When the combined bush 2 is held by the bracket 9, the bracket 9 fits between the protrusions of the connecting piece 6 which is folded in half and protrudes in the outer diameter direction, as shown in FIG. The bush 2 is positioned relative to the bracket 9.

Note that the connecting piece 6 may be formed at one location in the center in the axial direction. In this case, as shown in Figure 7,
An engagement hole 10 is provided in the bracket 9 in which the connection piece 6 is engaged and positioned.

<Effects of the invention> As described above, in the present invention, in the two-part bushing, the two parts are connected by a bendable connecting piece that can be combined and expanded, so the two parts always form a pair. Compared to the conventional fully separated type, it is much easier to handle during assembly, eliminates phase shift between the two when combined, and the connecting piece allows correct positioning of the bush with respect to the bracket, improving assembly work efficiency. It has advantages. Further, the minute protrusions formed along the inner circumferential surface of the bushing have the advantage of reducing the contact friction area between the rotating shaft and the bushing, resulting in smooth rotation of the rotating shaft and prevention of abnormal noise.

[Brief explanation of the drawing]

Figure 1 is a perspective view showing a conventional rotating shaft support structure;
2 is an exploded perspective view showing details of the support structure shown in FIG. 1, FIG. 3 is a perspective view of the bush according to the present invention in an expanded state, FIG. 5 is a perspective view of the bracket fixed to the fixed surface, FIG. 6 is an enlarged sectional view taken along the line of FIG. 5, and FIG. 7 is a perspective view showing another structure of the bracket. 1...Rotating shaft, 2...Button, 6...Connecting piece, 7...Thin bent portion, 8...Minute protrusion.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A bush that holds a rotating shaft, which is a pair of semi-cylindrical bodies made by dividing a cylindrical shaft made of synthetic resin into two in the axial direction, at one or more locations along the axial direction. The divided surfaces are connected so that they can be combined and unfolded by a thin connecting piece that can be bent, and the connecting piece is positioned by engaging with a bracket that holds the bushing in the folded state in which the pair of semi-cylindrical bodies are combined. A bushing characterized by protruding in the radial direction from the outer peripheral surface. (2) The bush according to claim 1 of the utility model registration, wherein minute protrusions are formed along the inner peripheral surfaces of the pair of semi-cylindrical bodies.