JPH10196669A - Friction joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily insert a fastening element in a sleeve. SOLUTION: Guide parts 30, 32 comprising curved projected surfaces 38, 40 whose cross sectional shape is an arc shape and taper surfaces 36, 42 brought into contact with the rear ends of the curved projected surfaces 38, 40, are arranged in an outside diameter part and an inside diameter part at the end of a sleeve 24. Under a condition that a pressurizing mechanism is loosened, a fastening element 44 with a shaft hole such as a gear, is fitted around the peripheral surface of the sleeve 24, and an axial fastening element 46 is fitted in the inside diameter part of the sleeve 24. When the fastening elements 44, 46 are inserted in the sleeve 24, the fastening elements 44, 46 are guided to the curved projected surface 38, 40 of the guide parts 30, 32 even though the fastening elements 44, 46 are slightly inclined against the sleeve 24 so that the directions thereof can be corrected, and smoothly inserted in the sleeve 24 without being hooked at the end of the sleeve 24. When the pressurizing mechanism is operated so as to compress a pressure medium in a pressure medium storing space part 28 after the fastening elements 44, 46 are inserted in, the inside diameter part of the sleeve 24 is contracted, and the outside diameter part thereof is expanded, therefore the fastening elements 44, 46 are fixed to the sleeve 24.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of contracting and expanding a sleeve with a pressure medium such as oil,
The present invention relates to a friction joint that couples a sleeve and a fastening element by a frictional force generated between the fastening element and the fastening element.

[0002]

2. Description of the Related Art As shown in FIG. 3, in this kind of friction joint, a main body (2) is composed of a flange (4) and a sleeve (6), and a pressure screw (8) is attached to the flange (4). ) Is built in. The chamber (1) formed in the flange (4)
A pressure medium such as oil is sealed in the pressure medium storage space (14) formed in 2) and the sleeve (6) communicating therewith. The pressure medium sealed in the chamber (12) is pressurized by tightening the pressure screw (8) and moves into the sleeve (6). Due to the pressurization of the pressure medium, the sleeve (6) receives pressure from the inside, the shaft-side sleeve (6a) contracts, and the hub-side sleeve (6b) expands, and the shaft (16) and the hub (18) are connected to each other. Is
They are connected via a sleeve (6).

[0003]

The above-mentioned friction joint has an advantage in that fastening elements such as a shaft and a hub can be easily and quickly attached and detached. However, when inserting the fastening element into the sleeve, if the fastening element is inclined with respect to the sleeve, the fastening element is hooked on the tip of the sleeve, and it is difficult to insert the fastening element. In this case, the fastening element could not be smoothly inserted into the sleeve even if the open end or the outer peripheral end of the sleeve had a chamfered structure. An object of the present invention is to solve the above problems.

[0004]

In order to achieve the above object, the present invention provides a pressure medium storage space (28) in a sleeve (24) and a pressure medium in the pressure medium storage space (28). In a friction joint that is filled and capable of compressing and decompressing the pressure medium, an outer diameter portion at a tip end of the sleeve (24) has an arc-shaped curved convex surface (38) and the curved convex surface. (38) a guide portion (30) for guiding a fastening element comprising a tapered surface (36) contacting a rear end, and further comprising the sleeve (24).
An arc-shaped curved convex surface (4
0) and a guide portion (32) for guiding a fastening element composed of a tapered surface (42) in contact with the rear end of the curved convex surface (40).

[0005]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. In FIG.
(20) is a main body of the friction joint, which is composed of a flange (22) and a sleeve (24), and has a built-in pressure mechanism in the flange (22). A pressure medium such as oil is sealed in the chamber (26) of the flange (22) and the pressure medium storage space (28) communicating therewith. Guide portions (30) and (32) are formed along the entire circumference at the ends of the inner diameter portion and the outer diameter portion of the sleeve (24). Guide part (3
0) is, as shown in FIG.
A curved convex surface (34) having a predetermined width and having a cross-sectional shape curved outwardly over the outer periphery, and a sleeve (2) in contact with the rear end of the curved convex surface (34).
4) and a tapered surface (36) formed over a predetermined width on the outer diameter portion.

The diameter of the top (38) of the curved convex surface (34) is set slightly smaller than the outer diameter of the sleeve (24). The guide part (32) of the inner diameter part of the sleeve tip is
The guide portion (30) of the outer diameter portion is formed symmetrically,
At the front end of the sleeve inner diameter portion, a curved convex surface (40) having a predetermined width and having a cross-sectional shape curved inward over the inner circumference is in contact with a rear end of the curved convex surface (40). And a tapered surface (42) formed over a predetermined width on the inner diameter of the sleeve (24). The diameter of the top of the curved convex surface (40) is set slightly larger than the inner diameter of the sleeve (24).

In the above construction, the fastening element (44) having a shaft hole, such as a gear, is fitted to the outer peripheral surface of the sleeve (24) with the pressurizing mechanism loosened, and the shaft-shaped fastening element (46) is fitted.
Into the inner diameter of the sleeve (24). Fastening element (4
4) When the (46) is inserted into the sleeve (24), even if the fastening elements (44) and (46) are slightly inclined with respect to the sleeve (24), the fastening elements (44) and (46) can be connected to the guide portion. It is guided by the curved convex surfaces (38) and (40) of (30) and (32), the direction of which is corrected, and the sleeve is smoothly inserted into the tip of the sleeve (24) without being caught. After inserting the fastening elements (44) and (46) into the sleeve (24) and operating the pressurizing mechanism to compress the pressure medium in the pressure medium storage space (28), the inner diameter of the sleeve (24) is reduced. The fastening element (44)
(46) is fixed to the sleeve (24).

When the compressing force of the pressure medium is released by operating the pressurizing mechanism, the sleeve (2) of the fastening element (44) (46) is released.
4) is released and the fastening elements (44) (4)
6) can be pulled out of the sleeve (24). In the present embodiment, the guide portions are provided on both the inner diameter portion and the outer diameter portion of the sleeve (24), but the guide portions may be provided on any one of them. Further, the inner diameter of the sleeve (24) is not particularly limited to a hollow configuration, and may be a configuration in which a solid shaft is fixed to the inner diameter.

[0009]

Since the present invention is constructed as described above, there is an effect that the fastening element can be easily attached and detached.

[Brief description of the drawings]

FIG. 1 is a sectional view of a friction joint.

FIG. 2 is an enlarged view of a guide unit.

FIG. 3 shows a prior art friction joint, and (A)
Is a front view, and (B) is a side view.

[Explanation of symbols]

 2 Body 4 Flange 6 Sleeve 8 Pressure Screw 10 Pressure Mechanism 12 Chamber 14 Pressure Medium Storage Space 16 Shaft 18 Hub 20 Main Body 22 Flange 24 Sleeve 26 Chamber 28 Pressure Medium Storage Space 30 Guide 32 Guide 34 34 Curved Convex Surface 36 Tapered surface 38 Top 40 Curved convex surface 42 Tapered surface 44 Fastening element 46 Fastening element

Claims (2)

[Claims] A pressure medium storage space (28) is provided in a sleeve (24), and a pressure medium is filled in the pressure medium storage space (28) so that the pressure medium can be compressed and decompressed. In the friction joint described above, the outer diameter portion at the front end of the sleeve (24) includes a curved convex surface (38) having an arc-shaped cross section and a tapered surface (36) in contact with the rear end of the curved convex surface (38). A friction coupling, characterized in that a guide part (30) for guiding the fastening element is provided. 2. A pressure medium storage space (28) is provided in a sleeve (24), and a pressure medium is filled in the pressure medium storage space (28) so that the pressure medium can be compressed and decompressed. In the friction joint described above, a curved convex surface (40) having an arc-shaped cross section and a tapered surface (42) in contact with the rear end of the curved convex surface (40) are formed at the inner diameter portion at the tip of the sleeve (24). A friction joint comprising a guide part (32) for guiding a fastening element.