JPH064100Y2 - Shaft coupling - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a shaft coupling, which is inserted from both ends of the coupling.
The present invention relates to a shaft joint in which the pair of shafts are surely centered and which can be easily inserted into the joints of both shafts.

(Prior Art) A conventional shaft joint of this type is typically a cylindrical joint, that is, both shaft ends are inserted into one cylindrical metal fitting from both ends, and the cylindrical metal fitting and the shaft are bolted or keyed. It is well known to use a pipe joint for fixing or a two-piece tubular joint, that is, a two-piece tubular body which is tightened with a ring or bolt.

(Problems to be solved by the invention) In the tubular joint, when a pair of shaft end portions are inserted into the tubular body from both end portions of the tubular body, if there is no large gap between them, both shafts It is effective in matching the centers of. On the other hand, however, the work of inserting the shaft end is difficult and troublesome, and the disassembling work thereafter is also troublesome.
Also, when a large gap is provided between the tubular joint and the shaft, it is easy to insert, assemble, and disassemble the shaft end, but on the other hand, when tightening the bolt in the axial direction, or when the key is It took time and skill to make the centers of both axes coincide during the driving operation. Also, in the case of a split joint, the work of hugging the shaft end into the joint is relatively simple, but the centers of both shafts are made to coincide, and that state is maintained for a long period of time. Since the parts have separability and separability between parts, a skill is required for the connection work for assembling the cylindrical joint more than for the assembling of the above-mentioned tubular joint for a strong fixed connection.

The present invention solves the above problems of the conventional shaft joint of the present invention, and adds the effective points inherent in the tubular joint and the split joint, respectively, and matches the center portions of both shafts. It is an object of the present invention to provide a shaft joint that is easy to work and has a strong joint between both shafts and the joint.

(Means for Solving Problems) In order to achieve this object, the present invention has the following configuration. That is, in the shaft coupling according to the present invention, a pair of cylinders having a diameter one step larger than the body is integrally formed at both ends of the center body, and the center of each cylinder is formed in the pair of cylinders. 2 slits in the relative position are cut from the outer end side of the tubular body to the inner end side of the tubular body closer to the body part, leaving a part in the inner end of the tubular body. The plurality of bolts are screwed to each cylinder in a direction orthogonal to the slit cutting direction so that the slit portion can be clamped.

(Example) Next, a specific example of the shaft coupling according to the present invention will be described with reference to the drawings.

<Example 1> FIG. 1 is a front view of a shaft coupling, FIG. 2 is a plan view thereof, FIG. 3 is a right side view of the same, and FIG. 4 is a sectional view taken along line AA of FIG. is there.

The shaft coupling (coupling) (1) for connecting the pair of shafts (a) and (a) of the present invention has the shape of a waist in the overall shape, and is attached to both ends of the cylindrical body (2) at the center. Is a tubular body having a diameter larger than that of the body (2) via an annular step (3) having a diameter one step smaller than that of the body (2).
(4) (4) is formed integrally by connecting a series of holes of the same diameter in the center, and these left and right cylinders (4) and (4) respectively pass through the center of each cylinder. , From the outer end side of the tubular body (4) to the inner end side of the tubular body close to the body part, the two at the relative position leaving a part (7) at the inner end portion of the tubular body (4) The slit of
(6) (6) is deeply cut.

Then, the slits (6) and (6) cut into both the cylinders (4) and (4) are located on the same plane.

And, in each cylinder (4), a bolt is provided so that the slit portion can be clamped in a direction orthogonal to the cutting direction of each slit (6).
(8) are mounted, and the screwing directions of these bolts (8) are changed alternately, that is, as shown in FIG. 4, the upper bolt is in the forward direction and the lower bolt is in the backward direction. And it is screwed by changing its screwing direction. In the drawing, the screw tightening bolt (8) is shown in the case of two cylinders on one side, one on the upper side and the other on the lower side.
By increasing the number of (8) and sequentially changing the screw tightening direction, the fixing force and the tightening force between the shaft and the shaft coupling can be approximately averaged at each part.

<Example: 2> FIG. 5 is a front view of a shaft coupling showing another example, and FIG. 6 is a plan view of the same.

The only structural difference from the above-mentioned Example 1 is the shaft coupling.
With respect to the pair of cylinders (4) and (4) constituting (1), the body of the cylinder is passed from the outer end side of the cylinder (4) through the center of each cylinder.
(2) To the inner end side closer to the side, the slit (6) is deeply cut, leaving a part in the inner end portion of the tubular body, and the slits (6) (6) of these two tubular bodies are mutually It is located on an orthogonal plane.

(Effect of the Invention) The present invention has a pair of cylindrical bodies integrally arranged at both ends of the body,
By inserting two slits at relative positions cut in the axial direction of the tubular body to form an elastic portion near the outer end of the tubular body, it is possible to insert the shaft end into each tubular body part. Further, since the tube body and the shaft are coupled and fixed together by utilizing the elasticity imparted to the outer end portion of the tube body, by screwing the bolts of each slit portion, On the contact surface with the cylindrical body, the tightening force that is approximately uniformed in each part acts, and it is possible to reliably prevent the shaft center from oscillating and tilting, which makes it possible to sufficiently cope with high-speed rotation. In addition, the shaft centers of both shafts can be easily matched, and in particular, the shaft centering work can be performed reliably by leaving a portion where the slit is not cut near the inner end of the cylindrical body. In addition, the strength of the shaft coupling itself can be sufficiently ensured. By forming an annular step having a smaller diameter between each cylinder and the body, the elastic force of the cylinder, more specifically toward the slit, increases, and the shaft and the cylinder The average fastening force can be secured with a relatively small force on a wide contact surface with. Also, the multiple bolts arranged around the shaft inserted in the cylinder are tightened by alternately changing the screwing direction, so that the holding force of the shaft of the cylinder also varies from this surface. It can be averaged, and stable fixation between the shaft coupling and the shaft can be secured. In addition, the slits provided in the pair of cylinders,
By cutting on the planes orthogonal to each other, the torsional force acting on the shaft joint is dispersed over the entire shaft joint, local fatigue of the joint can be avoided, and the effect of strengthening the shaft joint can be expected. .

[Brief description of drawings]

1 is a front view of a shaft coupling, FIG. 2 is a plan view of the same, FIG. 3 is a right side view of FIG. 4, FIG. 4 is a sectional view taken along the line AA of FIG. 2, and FIG. A view corresponding to FIG. 1 showing an embodiment, and FIG. 6 is a plan view of the shaft coupling shown in FIG. In the figure, (1) is a shaft coupling, (2) is a body, (3) is an annular step, (4) is a tubular body, (6) is a slit, (7) is a portion near the inner end of the tubular body, (8)
Indicates a bolt, and (a) (a) indicates an axis.

Claims (5)

[Scope of utility model registration request] 1. A pair of cylinders each having a diameter one step larger than that of the body are integrally formed at both ends of the center body, and the pair of cylinders respectively pass through the central portions of the respective cylinders to form a cylinder. From the outer end side of the body, two slits at relative positions are cut on the inner end side of the cylinder closer to the body part side, leaving a part in the inner end part of the cylinder, and each cylinder is cut. Is a shaft coupling in which bolts are screwed so that the slit portions can be pressed in a direction orthogonal to the cutting direction of each slit. 2. The shaft coupling according to claim 1, wherein the slits provided in the both cylindrical portions are cut on the same plane. 3. The shaft coupling according to claim 1, wherein the slits provided in the both cylindrical portions are cut on planes orthogonal to each other. 4. The utility model registration claim 1 wherein the body portion and the tubular body are integrally formed through an annular step portion having a diameter one step smaller than the tubular body and the body portion. Shaft coupling described in one section. 5. A utility model registration claim in which one of bolts for screwing each slit portion of each of the cylinders is alternately changing its screwing direction. Shaft coupling.