JPH08226456A - Coupling - Google Patents

Abstract

PURPOSE: To increase the strength against torsional load and make a cylindrical body difficult to crack. CONSTITUTION: Cylindrical bodies 26, 28 connected to two shafts are provided in the outer peripheral surfaces with slits 38 opening along the circumferential direction so that the cylindrical bodies 26, 28 can be deflected by the external stress. The slit 38 is made to have a curved surface on the end 38a so that the stress of torsional load is not concentrated to the cylindrical bodies 26, 28.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a leaf spring coupling or a cylindrical body for coupling two shafts having a mounting error so as to be interlocked with each other in the rotational direction by utilizing the deflection of the leaf spring or the cylindrical body. The present invention relates to a coupling such as a flexible coupling in which a cylindrical body is made into a helical shape and a cylindrical body is made into a spring shape.

[0002]

2. Description of the Related Art In a leaf spring coupling, as shown in FIGS. 5 and 6, cylindrical bodies 2 and 4 are provided with slits 6 and 8 in a transverse direction and a half direction so that they can be deformed in a diameter reducing direction. The cylinders 2 and 4 in which the shafts 12 and 14 have been inserted are tightened with the formed bolts 10, and the diameters of the cylinders 2 and 6 are reduced to fix the shafts 12 and 14 and the cylinders 2 and 4. Alternatively, the flexible coupling is configured such that the cylindrical body is provided with slits in a spiral shape so that the cylindrical body can be deformed in the flexible direction.

[0003]

As shown in FIG. 4, an end portion 6a of a slot 6 for deforming a cylindrical body in a diameter reducing or bending direction is formed in a flat shape. Therefore, there is a problem that stress concentrates on the corners K1 and K2 at right angles at both ends of the end portion 6a, and the cylindrical bodies 2 and 4 are easily cracked when a torsion load is applied. The present invention aims to solve this problem.

[0004]

In order to achieve the above object, according to the present invention, a cylindrical body is provided with slits formed on the outer peripheral surface of the cylindrical body so as to open along the circumferential direction, and the cylindrical body is reduced in diameter by an external load. In the coupling which is capable of being deformed in the flexure direction, the end portion of the slit has a curved surface.

[0005]

Since a right-angled corner is not formed at the end of the slit, the stress is not concentrated here, and the strength against the torsional load applied to the cylindrical body can be increased.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the present invention will be described below in detail with reference to the embodiments shown in the accompanying drawings. Reference numeral 16 is a leaf spring coupling, which is a pair of aluminum cylindrical bodies 26, 28 that can be fixed to the two shafts 18, 20 by the tightening force of bolts 22, 24.
, A cylindrical spacer 30 made of aluminum, and a pair of leaf springs 3
2, 34 and stoppers 3 for fixing the leaf springs 32, 34 to the end surfaces of the cylindrical bodies 26, 28 and both surfaces of the spacer 30.
6 is comprised.

On the peripheral walls of the cylindrical bodies 26 and 28, the cylindrical body 2
Slots 38 are formed along a plane perpendicular to the central axes of the cylindrical bodies 26, 28 over a range of about 270 degrees while leaving a part of the peripheral walls of 6, 28.

Reference numeral 40 denotes a slot formed on the peripheral wall portions 26a, 28a between the slot 38 of the cylindrical bodies 26, 28 and the open end face, and the peripheral wall portions 26a, 28a are in a half-split state. The end 38a of the slot 38 is rounded as shown in FIG. 4A, and has a curved surface shape.

The peripheral wall portions 26a and 28a are formed with holes 42 which vertically penetrate the slit 40 at a predetermined distance from the center of the cylindrical bodies 26 and 28, respectively.
In reference numeral 2, the slit 40 is sandwiched so that one side constitutes a clapping bolt insertion portion 42a and the other side constitutes a screw portion 42b.

The two points of the leaf spring 32, which are spaced from each other by 18 degrees, are fixed to the end surface of the cylindrical body 26 by the two stoppers 36 with a predetermined spacing, and the other two points of the leaf spring 32. The opposite spacers 30 by means of two stops 36
It is fixed to the end face of. Similarly, in the leaf spring 34, two points having an interval of 180 degrees are fixed to the end surface of the cylindrical body 28 with a predetermined interval by the two stoppers 36, and the other two points are two. It is fixed to the end faces of the spacers 30 facing each other by the stoppers 36.

In the above structure, there is a mounting error,
One of the two axes 18 and 20 that are offset from the coaxial line
The cylindrical body 26 is inserted and inserted in 8. Next, the clapping bolt 22 is inserted through the hole 42, and the bolt 22 is screwed into the screw portion 42b.
Screw into the cylindrical body 26 by the tightening force of the bolt 22.
The diameter of the peripheral wall portion 26a in the half-divided state is reduced to fix the cylindrical body 26 to the shaft 18.

The shaft 20 is also fixed to the cylindrical body 28 by the tightening force of the clapping bolt 24 by the same operation as described above. The present invention is not limited to the above-mentioned embodiment, and the present invention can be applied to a flexible shaft coupling in which a cylindrical body is made into a spring shape by slitting on a spiral formed in the aluminum cylindrical body. You can In this case, the end of the slit of the coupling is rounded to form a curved surface.

[0013]

As described above, the present invention makes the end portion of the slit a curved surface so that a right angle corner is not formed on both sides of the end portion.
Since the stress of the torsional load is not concentrated on the end portion of the slit, there is an effect that the cylindrical body is unlikely to be broken even when the torsional load is applied to the cylindrical body.

[Brief description of drawings]

FIG. 1 is a front view of a leaf spring coupling.

FIG. 2 is a left side view of the leaf spring coupling.

FIG. 3 is a right side view of the leaf spring coupling.

FIG. 4 is an enlarged sectional view of a slot.

FIG. 5 is a front view of a conventional technique.

FIG. 6 is a right side view of the related art.

[Explanation of symbols]

 2 cylindrical body 4 cylindrical body 6 slot 8 slot 10 bolt 12 shaft 14 shaft 16 leaf spring coupling 18 shaft 20 shaft 22 bolt 24 bolt 26 cylinder 28 cylinder 30 spacer 32 leaf spring 34 leaf spring 36 stopper 38 slip Split 40 Slot 42 Hole

Claims (1)

[Claims] 1. A coupling in which a cylindrical body is provided with slits formed on the outer peripheral surface of the cylindrical body along the circumferential direction so that the cylindrical body can be deformed in a diameter reducing direction or a bending direction by an external load. 2. The coupling, wherein the end portion of the slit is a curved surface.