JPH0193619A - Sleeve-like bearing - Google Patents

Abstract

PURPOSE:To obtain a sleeve-like bearing which may exhibit excellent durability by interposing a special film between a bearing inner sleeve and a reinforcing outer sleeve, and impregnating an adhesive curing resin into the special film. CONSTITUTION:A fluoro resin fiber cloth 1 containing an adhesive heat shrinkage polyester fiber woven thereinto at given intervals is mounted on an outer circumferential surface of a mandrel having a circular cross section by taping or vertical fitting, and is heat-treated, so that the cloth 1 is deformed to follow the outer circumferential surface of the mandrel. Thus, a bearing inner sleeve 2 having a circular bearing surface is formed. A gas shielding resin permeable film 3 is mounted on an outer circumferential surface of the bearing inner sleeve 2. Then, a heat resistant fiber 5 formed by immersing a glass fiber in an adhesive curing resin 4 containing epoxy resin is firmly wrapped around the film 3, and the adhesive curing resin 4 is heated to be dried. Thus, a reinforcing outer sleeve 6 united to the bearing inner sleeve 2 is formed.

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Field of Industrial Application The present invention provides a method of achieving a 300-degree structure by interposing a special film between the bearing inner cylindrical body and the reinforcing outer cylindrical body and impregnating it with an adhesive cured resin.
The present invention relates to a sleeve-shaped bearing that can achieve excellent self-lubricating properties, sliding properties, and durability.

(b) Prior art and its problems Many bearings using fluororesin fibers with excellent frictional properties have been developed. At that time, in order to obtain a bearing with excellent durability, other fibers that exhibit excellent reinforcing properties are used as a composite reinforcing member in combination with fluororesin fibers. There is a disclosed bearing.

However, in conventional bearings as disclosed in Japanese Patent Publication No. 49-29955, a liquid resin attached to reinforcing fibers is press-fitted into a cloth sleeve containing fluororesin fibers that forms the bearing surface. It is obtained by bonding fibers and reinforcing fibers together, but the bubbles generated in the liquid resin that is press-fitted into the fabric sleeve remain as many voids even after curing and bonding. These many voids induce cracks on the bearing surface due to the load generated during the bearing, causing some of the fluororesin fibers that make up the bearing surface to peel off, further accelerating the initial wear of the bearing surface. This has the disadvantage that backlash occurs during bearing, making it difficult to carry out a smooth bearing, and also that the durability of the bearing cannot be fully demonstrated.

(c) Problems to be solved by the present invention The problems to be solved by the present invention, that is, the purpose of the present invention is to solve the above-mentioned drawbacks of the prior art, and to achieve excellent sliding properties. A smooth sleeve-shaped bearing that exhibits sufficient self-lubricating properties and exhibits excellent durability without cracking or peeling on the bearing surface even when subjected to shocks and loads during bearing. It provides:

(d) Means for solving the problems The present invention has the following structure in order to achieve the object (c).

That is, the present invention provides a reinforcing outer cylinder made of heat-resistant fibers such as glass fibers with a bubble-blocking resin permeable membrane interposed between the inner cylinder of the bearing made of fluororesin fiber cloth, and a reinforced outer cylinder made of heat-resistant fibers such as glass fibers. It is characterized by a sleeve-shaped bearing impregnated with adhesive cured resin.

(e) Functions of the present invention Since the present invention has the above-described configuration, it exhibits the following functions.

(a) By constructing the bearing inner cylindrical body with fluororesin fiber fabric, the bearing surface is occupied by fluororesin fibers, so the self-lubricating effect unique to fluororesin and the strong shape-retaining effect of the woven structure can be applied to the bearing surface. can be fully demonstrated.

(b) By constructing the reinforcing outer cylindrical body from heat-resistant fibers, the entire bearing can sufficiently exhibit reinforcing and heat-resistant effects against the impact and heat generated during bearing.

(C) By interposing a bubble-blocking resin permeable membrane between the bearing inner cylinder and the reinforcing outer cylinder, it is possible to impregnate and adhere the reinforcing outer cylinder to the bearing inner cylinder with adhesive cured resin. In addition, the air bubbles that tend to be included in the adhesive cured resin can be completely blocked by the bubble-blocking resin permeable membrane, allowing only the adhesive cured resin to be impregnated into the bearing inner cylinder. It is possible to achieve a fine-grained resin impregnation effect without creating air bubbles (voids) inside the wood.

(F) Embodiment FIG. 1 is a partially cutaway perspective view showing the appearance of an embodiment of the sleeve-shaped bearing of the present invention.

First, the sleeve-shaped bearing of this embodiment as shown in FIG.
A fluororesin fiber fabric woven with bondable heat-shrinkable polyester fibers at predetermined intervals is taped or attached vertically to the outer circumferential surface of a mandrel with a perfect circular cross section, and heat treated to form a fluororesin fiber. A bearing inner cylinder 2 having a perfectly circular bearing surface is formed by following the deformation of the fiber fabric l, and then a polymer membrane, filter paper, or filter cloth is formed on the outer peripheral surface of the bearing inner cylinder 2. After attaching the bubble-blocking resin permeable membrane 3 by taping, the heat-resistant wire 115 made of glass fiber immersed in the adhesive cured resin 4 made of epoxy resin is tightly wound and covered to form the adhesive cured resin. 4 is heated and dried to form a reinforcing outer cylinder 6 that is integrated with the bearing inner cylinder 2, and after finishing the outer circumferential surface, it is cut into sleeve pieces of the desired bearing length. It is.

The sleeve-shaped bearing of this example obtained in this way is
It is possible to achieve an oil-free bearing by maximizing the self-lubricating action and sliding action unique to fluororesin fibers on the bearing surface. It can exhibit excellent durability without cracking or peeling, and can be fully applied to small bearing parts in precision equipment such as OA equipment and optical machinery. .

(g) Effects of the present invention Since the present invention has the above-described structure and operation, it produces the following effects.

■ By constructing the bearing inner cylinder with fluororesin fiber fabric, it fully exhibits the self-lubricating properties and sliding properties characteristic of fluororesin, and also exhibits the strong shape retention of the woven structure on the bearing surface. Therefore, it is possible to obtain a durable bearing that does not require lubrication.

■ By constructing the reinforced outer cylinder with heat-resistant fibers,
It can be used in a wider range of bearing fields than conventional bearings, as it can ensure complete durability and heat resistance against the shocks and heat that tend to occur in bearings.

■ By interposing a bubble-blocking resin permeable membrane between the bearing inner cylinder and the reinforced outer cylinder, fine-grain adhesiveness is achieved that does not create voids inside the bearing inner cylinder. Because it can exhibit the resin impregnation effect of cured resin,
Even against continuous loads and continuous impacts during long-term bearings, the air bubbles in the adhesive resin impregnated on the bearing surface (
It exhibits excellent durability without causing cranking or peeling of the bearing surface that tends to occur due to voids), and provides a smooth bearing surface to provide a stable bearing effect without play. The effect is significant.

[Brief explanation of the drawing]

The drawings relate to the sleeve-shaped bearing of the present invention, and FIG. 1 is a partially cutaway perspective view showing the appearance of one embodiment thereof. 1...Fluororesin fiber fabric 2...Bearing inner cylinder 3...Bubble-blocking resin permeable membrane 4...Adhesive effect resin 5...Heat-resistant fiber 6...Reinforced outer cylinder body

Claims (4)

[Claims] (1) A reinforcing outer cylinder made of heat-resistant fibers with a bubble-blocking resin permeable membrane interposed between the bearing inner cylinder made of fluororesin fiber cloth and impregnated with an adhesive cured resin. Features a sleeve-shaped bearing. (2) The sleeve-shaped bearing according to claim 1, wherein the adhesive cured resin is an epoxy resin. (3) The sleeve-shaped bearing according to claim 1 or 2, wherein the heat-resistant fiber is glass fiber. (4) The sleeve-shaped bearing according to any one of claims 1 to 3, wherein the fluororesin fiber fabric is a plain woven fabric woven with only fluororesin fibers or with other bondable fibers. .