JPH0530563U - Shaft coupling - Google Patents

Abstract

(57) [Abstract] [Purpose] To obtain a keyless shaft coupling that is easy to manufacture and assemble and can reduce the cost. [Structure] An insert 6 is inserted into an annular expansion recess 5 formed on an inner surface of a housing sleeve 2 of a shaft coupling 1, and the insert 6 includes a bush 7 and an annular elastic body 8 mounted on an outer periphery of a sleeve portion of the bush. And an annular pressing ring 9, the pressing screw 13 is screwed into the pressing screw hole 12 of the joint flange 3 and pressed against the pressing ring 9, whereby the annular elastic body 8 is axially compressed and elastically deformed. It is extended both radially outward and radially inward to create a strong frictional engagement for fixation.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 According to the present invention, a cylindrical accommodating sleeve for accommodating an end of a cylindrical shaft and a radially outward projection from one end of the accommodating sleeve are abutted against the other half of the shaft joint for bolt connection. The present invention relates to a shaft joint having a joint flange provided with a plurality of screw holes.

[0002]

[Prior Art]

 In such a conventional shaft coupling, a key groove is provided on the inner surface of the cylindrical housing sleeve of the shaft coupling parallel to the axial direction, and a key groove is also formed at the end of the shaft connected to this shaft coupling. Then, with the key fitted in the keyway of the shaft end, insert the key portion that protrudes outward in the radial direction from the shaft end into the keyway of the shaft joint at an angle to the shaft joint. The non-rotatable connection between the shaft and the shaft coupling, and the relative movement in the axial direction of the shaft and the shaft coupling by closing the set screw that penetrates the key groove in the radial direction at the position corresponding to the key groove of the cylindrical housing sleeve. I was trying to prevent.

[0003]

[Problems to be solved by the device]

 However, in the case of such a conventional shaft joint, a key groove must be formed on the shaft itself connected to the joint, and the key groove on the joint side and the key groove on the shaft end and the key itself are fitted without clear lance. If they do not match, problems such as backlash and eccentricity occur. In addition, the key groove on the joint side and the key groove on the shaft end side need to be aligned with each other, and the assembly is troublesome.

Therefore, an object of the present invention is to obtain a keyless shaft coupling which does not use a key which is troublesome to assemble.

[0005]

[Means for Solving the Problems]

 In order to achieve this object, the shaft coupling according to the present invention has an annular expansion recess formed on the inner surface of the housing sleeve from the other end of the housing sleeve toward the joint flange, and the expansion recess. Insert, a retainer means for holding the insert in the expansion recess, a plurality of holding screw holes provided in the joint flange at equal angular intervals along the contour of the expansion recess, and the holding screw. The insert includes a cap screw that is screwed into the hole, and the insert has a sleeve portion having an inner diameter substantially equal to the inner diameter of the housing sleeve and a radially outwardly projecting outer diameter of the expansion recess from the sleeve portion. A bush made of a flange portion having substantially the same diameter, an annular elastic body mounted on the outer circumference of the sleeve portion of the bush, and an end of the annular elastic body on the side opposite to the flange portion. And an annular pressing ring that abuts against the pressing flange, and the pressing screw is screwed into the pressing screw hole of the joint flange and pressed against the pressing ring to compress the annular elastic body in the axial direction and elastically deform it. It is characterized by being configured.

[0006]

[Action]

 According to this configuration of the present invention, the axial compression of the annular elastic body causes the radially outward expansion and the radially inward contraction to cause the bush to be caught in the shaft end portion, and A strong frictional engagement with the housing sleeve and bush of the joint is created to strengthen the joint between the shaft and the shaft joint.

[0007]

【Example】

 Next, preferred embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a side view showing a partial cross-section with a shaft end portion SE inserted into a shaft coupling 1 according to the present invention. The shaft coupling 1 has a cylindrical housing sleeve 2 and a joint flange 3 which projects radially outward from one end of the housing sleeve. It is preferable that the cylindrical housing sleeve 2 and the joint flange 3 are integrally formed. The joint flange 3 is provided with a plurality of screw holes 4 that abut on the other half of the shaft joint and are bolt-connected.

An annular expansion recess 5 is provided on the inner surface of the receiving sleeve from the other end of the receiving sleeve toward the joint flange. An insert 6 shown in FIG. 4 is inserted into the expanded recess 5. The insert 6 has a sleeve portion 7a having an inner diameter which is substantially equal to the inner diameter of the housing sleeve 2 in a state where no load is applied, and a diameter which protrudes radially outward from this sleeve portion and is substantially equal to the outer diameter of the expansion recess. A bush 7 (see FIG. 4) including a flange portion 7b, a highly elastic annular elastic body 8 made of, for example, rubber or plastic attached to the outer circumference of the sleeve portion 7a of the bush, and an annular member on the side opposite to the flange portion 7b. It is composed of an annular pressing ring 9 that abuts against the end of the elastic body 7. The bush 7 may be provided with an axial slit as shown in the drawing, or may be thin.

In order to hold the insert 6 in the expansion recess 5, a retainer ring 10 as a retainer means having a radial width equal to the wall thickness of the housing sleeve is attached to the end of the housing sleeve by a mounting bolt 11.

The joint flange 3 is provided with a plurality of cap screw holes 12 provided at equal angular intervals along the contour of the expansion recess 5 and a cap screw 13 to be screwed into the cap screw holes. By screwing the screw 13 into the holding screw hole 12 and crimping it to the annular pressing ring 9, the annular elastic body 8 is axially compressed and elastically deformed. At this time, the annular elastic body 8 expands radially outward and contracts radially inward. The bush is also contracted by the contraction of the annular elastic body 8 inward in the radial direction to grip the shaft. In particular, in the case of a bush with slits, the shaft is gripped by contracting so that it firmly entangles with the inserted shaft. Further, the bushing can be firmly fixed to the receiving sleeve by friction by expanding the annular elastic body 8 outward in the radial direction.

[0012]

[Effect of the device]

 According to the present invention, since it is a keyless joint that utilizes the dimensional change of the elastic body, there is no need to worry about dimensional errors and angle alignment, manufacturing and assembly are simplified, and therefore costs can be reduced. Moreover, there is no backlash or eccentricity.

Further, since the elastic body is interposed, the shock torque can be absorbed, resulting in a soft transmission mechanism.

[Brief description of drawings]

FIG. 1 is a side view showing a partial cross section of a shaft coupling according to the present invention with a shaft inserted therein.

FIG. 2 is an end view of the joint flange side of FIG.

FIG. 3 is an end view on the side opposite to the joint flange side of FIG.

FIG. 4 is a perspective view of a bush with a slit of a shaft coupling according to the present invention.

[Explanation of symbols]

 1 Shaft Coupling 2 Housing Sleeve 3 Joint Sleeve 4 Screw Hole 5 Expanding Dimple 6 Insert 7 Bush with Slit 8 Ring Elastic Body 9 Pressing Ring 10 Retainer Ring 11 Mounting Bolt 12 Holding Screw Hole 13 Holding Screw

Claims (1)

[Scope of utility model registration request] 1. A cylindrical accommodating sleeve for accommodating an end portion of a cylindrical shaft, and a radially outwardly projecting outer end of the accommodating sleeve, which is abutted against the other half of the shaft joint to be bolted thereto. In a shaft joint having a joint flange provided with a plurality of screw holes, an annular expansion recess formed on the inner surface of the housing sleeve from the other end of the housing sleeve toward the joint flange, An insert to be inserted into the expansion recess, a retainer means for holding the insert in the expansion recess, a plurality of holding screw holes provided on the joint flange at equal angular intervals along the contour of the expansion recess, and The insert includes a cap screw that is screwed into the cap screw hole, and the insert has a sleeve portion having an inner diameter substantially equal to the inner diameter of the housing sleeve, and extends radially outward from the sleeve portion. A bush made of a flange portion having a diameter substantially equal to the outer diameter of the recess, an annular elastic body mounted on the outer circumference of the sleeve portion of the bush, and an end portion of the annular elastic body on the opposite side of the flange portion. It is configured by an annular pressing ring, and is configured to elastically deform by compressing the annular elastic body in the axial direction by screwing a pressing screw into a pressing screw hole of the joint flange and crimping the pressing ring to the pressing ring. And shaft coupling.