JP2006207692A - Rotor fixing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotor fixing device for allowing easy disassembly of a rotor from a shaft during maintenance. <P>SOLUTION: A wedge joint means 3 for the rotor fixing device is provided on tapered faces 2a, 2b as a fitted face 7a between an inner ring 7A and an outer ring 7B of an intermediate rotor 7 provided between the shaft 4 and the rotor 5, and a fastening bolt 6 is threaded to one screw hole 9 formed on the shaft 4 through a see-through hole 10a of a wall 10 perpendicular to an axial line C, provided in the inner ring 7A. On a shaft portion 6a of the fastening bolt 6, a doughnut-shaped interference body 11 is mounted with welding. During maintenance, the rotor 5 is disassembled from the shaft 4 by making the interference body 11 interfere with the inner face of the wall 10 of the inner ring 7A with the fastening bolt 6 rotated in a screwing direction and moved back to move the inner ring 7A in the direction of canceling the wedge joint of the wedge joint means 3. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a rotating body fixing device that fastens a rotating body such as a gear, a pulley, a sprocket, and a wheel to a shaft so as to be rotatable simultaneously with the shaft by a keyless structure.

  Conventionally, as a rotating body fixing device for fastening a rotating body such as a gear, a pulley, a sprocket, a wheel or the like to a shaft so as to be capable of rotating simultaneously with the shaft by a keyless structure, the one shown in FIG. Reference 1).

  This rotary body fixing device fastens the shaft 4 and the rotary body 5 via the wedge coupling means 3 in which the tapered surfaces 2a and 2b of the inner and outer rotary bodies 1 are wedge-coupled, and the wedge coupling force of the wedge coupling means 3 Is provided by tightening a plurality of tightening bolts 6 in the direction of the rotation axis C.

JP-A-61-62618

  In the rotating body fixing device described in the above document, the wedge coupling means 3 has an inner ring 7A and an outer ring 7B interposed between the shaft 4 and the rotating body 5 and functions as an intermediate rotating body 7. The fastening bolt 6 is provided on the tapered surfaces 2a and 2b, which are the fitting surfaces 7a of the rotating body 1, and the fastening bolt 6 is passed through the through hole 8a of the flange 8 provided at the end of the inner ring 7A of the intermediate rotating body 7 to the outer ring 7B. Screwed into a plurality of screw holes 9 extending parallel to the axis C direction of the formed shaft 4. In FIG. 5, 7b is a cutout portion of the outer ring 7B, and 12 is a slit provided in the inner ring 7A.

  Therefore, when the intermediate rotating body 7 is inserted between the shaft 4 and the rotating body 5 and a plurality of tightening bolts 6 are tightened, the taper fitting action between the tapered surfaces 2 a and 2 b of the inner and outer rotating bodies 1, that is, a wedge. By the wedge coupling action of the coupling means 3, the inner ring 7A is exerted on the shaft 4, the outer ring 7B is exerted on the boss inner surface 5a, and the inner ring 7A and the outer ring 7B are brought into pressure contact with each other. 5 is fixed to the shaft 4 so as to be simultaneously rotatable.

  However, in the case of maintenance or the like, even if a plurality of tightening bolts 6 are removed prior to disassembling the rotating body 5 from the shaft 4, the pressure contact state is firmly maintained, so that the shaft 4 rotates. It is difficult to remove the intermediate rotating body 7 from between the bodies 5. For this reason, normally, a plurality of disassembly screw holes (not shown) are formed in advance at appropriate positions between the pitches of the plurality of screw holes 9 formed in the outer ring 7B. Corresponding disassembly bolt insertion holes (not shown) are formed in the flange 8 of the inner ring 7A, and after removing the plurality of fastening bolts 6, a plurality of disassembly screw holes are passed through the disassembly bolt insertion holes. By disassembling a disassembling bolt (not shown) to each of these, and pulling these disassembling bolts with a disassembling tool, the intermediate rotating body 7 must be removed from between the shaft 4 and the rotating body 5. There is a problem that the work of disassembling the rotating body 5 from 4 is extremely complicated.

  The present invention solves such problems, and an object of the present invention is to provide a rotating body fixing device capable of easily disassembling a rotating body from a shaft during maintenance or the like.

  In order to achieve the above-mentioned object, according to the present invention, the shaft and the rotating body are fastened via the wedge coupling means in which the tapered surfaces of the inner and outer rotating bodies are wedge-coupled, and the wedge coupling force of the wedge coupling means is tightened. In the rotating body fixing device applied by tightening the attached bolt in the axial direction of the shaft, the tightening bolt interferes with one of the inner and outer rotating bodies as the tightening bolt is released. An interference body for moving either one of the inner and outer rotating bodies in a direction to release the wedge coupling of the wedge coupling means is provided.

  According to this, when the tightening bolt is tightened, the inner rotating body becomes the shaft, the outer rotating body becomes the rotating body, and the outer rotating body becomes the rotating body by the taper fitting action between the tapered surfaces of the inner and outer rotating bodies, that is, the wedge coupling action of the wedge coupling means. The inner and outer rotating bodies are pressed against each other, and the rotating bodies are fixed to the shaft so as to be simultaneously rotatable. In order to release the tightening bolt during maintenance, etc., if the tightening bolt is rotated backward in the unscrewing direction, the interference body interferes with either the internal or external rotating body. Then, the rotating body can be disassembled from the shaft by moving it in the direction of releasing the wedge coupling of the wedge coupling means.

  According to the present invention, in the rotating body fixing device, the wedge coupling means is provided on a fitting surface between an inner ring and an outer ring of an intermediate rotating body interposed between a shaft and the rotating body, and the fastening bolt Is screwed into an axial screw hole formed in the shaft through a wall perpendicular to the axis provided in the inner ring of the intermediate rotating body, and the tightening bolt is tightened with the tightening bolt. There may be provided an interference body that interferes with the wall of the inner ring as it is released and moves the inner ring in a direction to release the wedge coupling of the wedge coupling means.

  According to this, when the tightening bolt is tightened, the inner ring is turned into the shaft, the outer ring is turned into the rotating body, and the outer ring is turned into the rotating body by the wedge coupling action of the wedge coupling means provided on the fitting surface between the inner ring and the outer ring of the intermediate rotating body. The inner and outer rings are pressed against each other, and the rotating body is fixed to the shaft so that it can rotate simultaneously. Further, when releasing the tightening bolt for maintenance, etc., when the tightening bolt is rotated backward in the unscrewing direction, the interfering member interferes with the inner ring wall along with the retraction, and the inner ring The rotating body can be disassembled from the shaft by moving the wedge coupling means in the direction of releasing the wedge coupling.

  Further, in the present invention, in the rotating body fixing device, the wedge coupling means is provided on a fitting surface between an intermediate rotating body that is externally fitted to a shaft and a rotating body that is externally fitted to the intermediate rotating body, A tightening bolt is screwed into an axial screw hole formed in the shaft through a wall perpendicular to the axis provided in the rotating body, and the tightening bolt is tightened with the tightening bolt. There may be provided an interference body that interferes with the wall of the rotating body as it is released and moves the rotating body in a direction to release the wedge coupling of the wedge coupling means.

  According to this, when the tightening bolt is tightened, the intermediate rotating body is pressed against the shaft and the rotating body by the wedge coupling action of the wedge coupling means provided on the fitting surface of the intermediate rotating body and the rotating body, A rotating body is fixed to the shaft so that it can rotate simultaneously. Further, in order to release the tightening of the tightening bolt during maintenance or the like, when the tightening bolt is rotated backward in the unscrewing direction, the interference body interferes with the wall of the rotating body along with the retraction, The rotating body can be disassembled from the shaft by moving the rotating body in the direction of releasing the wedge coupling of the wedge coupling means.

  According to the present invention, in the rotating body fixing device, the wedge coupling means is provided on a fitting surface between a shaft and a rotating body fitted on the shaft, and the tightening bolt is provided on the rotating body. The screw is screwed into an axial screw hole formed in the shaft through a wall perpendicular to the axis of the shaft, and the tightening bolt is attached to the rotating body when the tightening bolt is released. There may be provided an interference body that interferes with the wall and moves the rotating body in a direction to release the wedge coupling of the wedge coupling means.

  According to this, when the fastening bolt is tightened, the rotary body is pressed against the shaft by the wedge coupling action of the wedge coupling means provided on the fitting surface between the shaft and the rotary body, and the rotary body rotates simultaneously with the shaft. Fixed as possible. Further, in order to release the tightening of the tightening bolt during maintenance or the like, when the tightening bolt is rotated backward in the unscrewing direction, the interference body interferes with the wall of the rotating body along with the retraction, The rotating body can be disassembled from the shaft by moving the rotating body in the direction of releasing the wedge coupling of the wedge coupling means.

  Further, in the present invention, in the rotating body fixing device, the wedge coupling means is provided on a fitting surface between an inner ring and an outer ring of an intermediate rotating body interposed between a shaft and the rotating body, and the fastening bolt Is screwed into a screw hole in the axial direction of the shaft formed in the outer ring through a flange provided at an end of the inner ring of the intermediate rotating body. There may be provided an interference body that interferes with the flange of the inner ring as the tightening is released and moves the inner ring in a direction to release the wedge coupling of the wedge coupling means.

  According to this, when the tightening bolt is tightened, the inner ring is turned into the shaft, the outer ring is turned into the rotating body, and the outer ring is turned into the rotating body by the wedge coupling action of the wedge coupling means provided on the fitting surface between the inner ring and the outer ring of the intermediate rotating body. The inner and outer rings are pressed against each other, and the rotating body is fixed to the shaft so that it can rotate simultaneously. Further, when releasing the tightening bolt for maintenance, etc., when the tightening bolt is rotated backward in the unscrewing direction, the interference member interferes with the flange of the inner ring along with the retraction, and the inner ring The rotating body can be disassembled from the shaft by moving the wedge coupling means in the direction of releasing the wedge coupling.

  According to the present invention, in order to release the tightening of the tightening bolt during maintenance of the rotating body fixing device or the like, when the tightening bolt is rotated backward in the unscrewing direction, Interfering with either one of the inner and outer rotating bodies and moving it in the direction of releasing the wedge coupling of the wedge coupling means, so as to screw the disassembly bolt into the disassembly screw hole as in the prior art, The rotating body can be easily disassembled from the shaft without the troublesome and difficult work of pulling these screwed disassembling bolts with a separate disassembly tool.

Embodiments of a rotating body fixing device according to the present invention will be described below with reference to the drawings.
FIG. 1 is a cross-sectional view showing a first embodiment of a rotating body fixing device according to the present invention. In addition, the same code | symbol is attached | subjected and demonstrated to the part which is the same as that of the prior art example shown in FIG.

  In FIG. 1, the rotating body fixing device fastens the shaft 4 and the rotating body 5 via the wedge coupling means 3 in which the tapered surfaces 2 a and 2 b of the inner and outer rotating bodies 1 are wedge-coupled with each other. The wedge coupling force is configured to be applied by tightening one tightening bolt 6 in the rotation axis C direction.

  The wedge coupling means 3 has an inner ring 7A and an outer ring 7B interposed between the shaft 4 and the rotating body 5, and is the fitting surface 7a of the inner / outer rotating body 1 functioning as the intermediate rotating body 7. One of the tightening bolts 6 in the direction of the axis C formed on the shaft 4 through the through hole 10a of the wall 10 perpendicular to the axis C provided on the inner ring 7A of the intermediate rotating body 7 is provided on the tapered surfaces 2a, 2b. While being screwed into the screw hole 9, for example, a donut-shaped interference body 11 is attached to the shaft portion 6 a of the tightening bolt 6 by welding. In other words, the donut-shaped interference body 11 is inserted into the through hole 10a provided in the wall 10 of the inner ring 7A before the tightening bolt 6 is screwed into the screw hole 9. Is attached in advance by welding. In addition, a slit 12 in the direction of the axis C is formed in the tapered cylindrical portion of the inner ring 7A at a predetermined interval in the circumferential direction, and the outer ring 7B is constituted by a partially open ring provided with a missing circle part 7b. ing.

  With such a configuration, when the tightening bolt 6 is tightened, the taper fitting action of the taper surfaces 2a and 2b, which are the fitting faces 7a of the inner ring 7A and the outer ring 7B, that is, the wedge coupling action of the wedge coupling means 3 is achieved. Thus, the inner ring 7A is fixed to the shaft 4, the outer ring 7B is pressed to the rotating body 5, and the inner and outer rings 7A and 7B are pressed against each other, so that the rotating body 5 is fixed to the shaft 4 so as to be simultaneously rotatable. Further, in order to release the tightening of the tightening bolt 6 during maintenance or the like, when the tightening bolt 6 is rotated in the unscrewing direction and retracted, the interference body 11 moves along the wall 10 of the inner ring 7A. The rotating body 5 can be easily disassembled from the shaft 4 by moving the inner ring 7A in the direction of releasing the wedge coupling of the wedge coupling means 3, that is, the left direction in FIG.

  FIG. 2 is a cross-sectional view showing a second embodiment of the rotating body fixing device according to the present invention. The second embodiment differs from the first embodiment of FIG. 1 in that the inner and outer rotating bodies 1 are constituted by an intermediate rotating body 7 and a rotating body 5, and the wedge coupling means 3 is externally fitted on the shaft 4. It is provided on tapered surfaces 2 a and 2 b which are fitting surfaces 7 a between the rotating body 7 and the rotating body 5 fitted on the intermediate rotating body 7, and the tightening bolt 6 passes through the wall 10 of the rotating body 5. This is a point that is screwed into one screw hole 9 in the direction of the axis C formed in the shaft 4 through the hole 10a. Accordingly, the same or corresponding parts as those in the first embodiment of FIG.

  With such a configuration, when the fastening bolt 6 is tightened, the taper fitting action between the taper surfaces 2a and 2b, which are the fitting surfaces 7a of the intermediate rotating body 7 and the rotating body 5, that is, the wedge coupling means 3 Due to the wedge coupling action, the intermediate rotating body 7 is pressed against the shaft 4 and the rotating body 5, respectively, and the rotating body 5 is fixed to the shaft 4 so as to be capable of simultaneous rotation. Further, in order to release the tightening of the tightening bolt 6 during maintenance or the like, when the tightening bolt 6 is rotated backward in the unscrewing direction, the interference body 11 is caused to move along with the wall 10 of the rotating body 5. The rotating body 5 can be easily disassembled from the shaft 4 by moving the rotating body 5 in the direction to release the wedge coupling of the wedge coupling means 3, that is, the left direction in FIG.

  FIG. 3 is a cross-sectional view showing a third embodiment of the rotating body fixing device according to the present invention. The third embodiment differs from the second embodiment shown in FIG. 2 in that the inner / outer rotator 1 is constituted by the rotator 5 and the shaft 4, and the wedge coupling means 3 is fitted on the shaft 4 and the shaft 4. It is a point provided in taper surface 2a, 2b which is a fitting surface 7a with the rotary body 5 to be. Therefore, the same or corresponding parts as those in the second embodiment in FIG.

  In such a configuration, when the fastening bolt 6 is tightened, the taper surfaces 2a and 2b, which are the mating surfaces 7a of the shaft 4 and the rotating body 5, are joined to each other, that is, the wedge coupling means 3 is wedge coupled. By the action, the rotating body 5 is pressed against the shaft 4, and the rotating body 5 is fixed to the shaft 4 so as to be capable of simultaneous rotation. Further, in order to release the tightening of the tightening bolt 6 during maintenance or the like, when the tightening bolt 6 is rotated backward in the unscrewing direction, the interference body 11 is caused to move along with the wall 10 of the rotating body 5. The rotating body 5 can be easily disassembled from the shaft 4 by moving the rotating body 5 in the direction to release the wedge coupling of the wedge coupling means 3, that is, the left direction in FIG.

  FIG. 4 is a sectional view showing a fourth embodiment of the rotating body fixing device according to the present invention. The fourth embodiment differs from the first embodiment of FIG. 1 in that a plurality of tightening bolts 6 are provided on the outer ring 7B through a through-hole 8a of a flange 8 provided at an end of the inner ring 7A in the intermediate rotating body 7. Are screwed into a plurality of screw holes 9 formed in the direction of the axis C. Accordingly, the same or corresponding parts as those in the first embodiment of FIG.

  With such a configuration, when a plurality of tightening bolts 6 are tightened, the taper fitting action between the tapered surfaces 2a and 2b, which are the fitting surfaces 7a of the inner ring 7A and the outer ring 7B in the intermediate rotating body 7, that is, By the wedge coupling action of the wedge coupling means 3, the inner ring 7 A is brought into pressure contact with the shaft 4, the outer ring 7 B is brought into pressure contact with the rotating body 5, and the inner and outer rings 7 A and 7 B are pressed against each other. Fixed. Further, in order to release the tightening of each tightening bolt 6 during maintenance or the like, when the tightening bolt 6 is rotated in the unscrewing direction and retracted, the interference body 11 is caused to move away from the flange 8 of the inner ring 7A. The rotating body 5 can be easily disassembled from the shaft 4 by moving the inner ring 7A in the direction of releasing the wedge coupling of the wedge coupling means 3, that is, the left direction in FIG.

  In the fourth embodiment, a plurality of tightening bolts 6 are connected in the direction of the axis C formed in the outer ring 7B through the through-holes 8a of the flange 8 provided at the end of the inner ring 7A in the intermediate rotating body 7. Although described with a structure screwed into a plurality of screw holes 9, a plurality of through-holes in the direction of the axis C of the shaft 4 are formed in the outer ring 7B of the intermediate rotating body 7, and a plurality of through-holes are passed through these through-holes. A structure in which the fastening bolt 6 is screwed into a plurality of screw holes in the direction of the axis C formed in the inner ring 7A of the intermediate rotating body 7 may be employed.

It is sectional drawing which shows 1st Embodiment of the rotary body fixing device which concerns on this invention. It is sectional drawing which shows 2nd Embodiment of the rotary body fixing device which concerns on this invention. It is sectional drawing which shows 3rd Embodiment of the rotary body fixing device which concerns on this invention. It is sectional drawing which shows 4th Embodiment of the rotary body fixing device which concerns on this invention. It is sectional drawing which shows the prior art example of a rotary body fixing device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Inner / outer rotating body 2a Tapered surface 2b Tapered surface 3 Wedge coupling means 4 Shaft 5 Rotating body 6 Tightening bolt 7 Intermediate rotating body 7a Fitting surface 7A Inner ring 7B Outer ring 8 Flange 8a Through hole 9 Screw hole 10 Wall 10a Through hole 11 Interference Body C axis

Claims (5)

The shaft and the rotating body are fastened via the wedge coupling means in which the tapered surfaces of the inner and outer rotating bodies are wedge-coupled, and the wedge coupling force of the wedge coupling means is applied by tightening the bolt in the axial direction of the shaft. In the rotating body fixing device to be
When the tightening bolt is released, the tightening bolt interferes with one of the inner and outer rotating bodies and releases either the inner or outer rotating body from the wedge coupling means. A rotating body fixing device comprising an interference body that moves in a direction. The rotating body fixing device according to claim 1,
The wedge coupling means is provided on a fitting surface between an inner ring and an outer ring of an intermediate rotating body interposed between the shaft and the rotating body, and the fastening bolt is provided on the inner ring of the intermediate rotating body. And is screwed into an axial screw hole formed in the shaft through a wall orthogonal to the inner surface of the inner ring, and the tightening bolt interferes with the wall of the inner ring when the tightening bolt is released. An apparatus for fixing a rotating body, wherein an interference body is provided for moving an inner ring in a direction to release the wedge coupling of the wedge coupling means. The rotating body fixing device according to claim 1,
The said axis | shaft line in which the said wedge coupling means is provided in the fitting surface of the intermediate rotary body externally fitted by the axis | shaft, and the rotary body externally fitted by this intermediate rotary body, and the said clamping bolt is provided in the said rotary body Is screwed into an axial screw hole formed in the shaft through a wall orthogonal to the shaft, and the tightening bolt interferes with the wall of the rotating body as the tightening bolt is released, An apparatus for fixing a rotating body, comprising: an interference body for moving the rotating body in a direction to release the wedge coupling of the wedge coupling means. The rotating body fixing device according to claim 1,
The wedge coupling means is provided on a fitting surface between a shaft and a rotating body fitted on the shaft, and the fastening bolt is connected to the shaft through a wall perpendicular to the axis of the shaft provided on the rotating body. The tightening bolt is screwed into the formed axial screw hole, and the tightening bolt interferes with the wall of the rotating body when the tightening bolt is released, and the rotating body is connected to the wedge coupling means. A rotating body fixing device comprising an interference body that moves in a direction to release the wedge coupling. The rotating body fixing device according to claim 1,
The wedge coupling means is provided on a fitting surface between an inner ring and an outer ring of an intermediate rotating body interposed between a shaft and the rotating body, and the fastening bolt is provided at an end of the inner ring of the intermediate rotating body. Threaded into the axial screw hole of the shaft formed in the outer ring through the flange, and the tightening bolt interferes with the flange of the inner ring as the tightening bolt is released, An rotator fixing device characterized in that an interference body is provided for moving the inner ring in a direction to release the wedge coupling of the wedge coupling means.

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