JP2918831B2 - Rotating body fixture - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotator fixing device for fixing a rotator to a shaft.

[0002]

2. Description of the Related Art Conventionally, as means for fixing a rotating body such as a pulley or a gear to a shaft, a key groove is formed in a shaft hole or a shaft of a boss of the rotating body, and the two are fixed with a key or fitted to the shaft. Means are used in which a set screw is screwed onto the boss of the rotating body to be fitted, and the tip of the set screw is pressed against and fixed to the outer peripheral surface of the shaft inserted into the boss.

Further, as disclosed in Japanese Utility Model Publication No. 62-6338, wedge-shaped portions are formed on both outer sides of an inner race fitted on the outer peripheral surface of the shaft and an outer race fitted on the inner periphery of the boss of the rotating body. A tapered surface is formed, a pair of tapered rings are wedge-fitted from each side by a number of tightening bolts between the respective wedge-shaped tapered surfaces, the inner peripheral surface of the inner race is enlarged, and the outer peripheral surface of the inner race is pressed against the outer peripheral surface. A rotating body fixture having a structure in which the outer peripheral surface of the race is pressed against the inner peripheral surface of the boss to fasten the shaft and the boss has been proposed.

[0004]

In the case where the rotating body is fixed to the shaft using the above-mentioned key, it is necessary to form a key groove in the shaft hole or the shaft of the boss of the rotating body, and the boss of the rotating body needs to be formed. In the case of fixing the shaft by tightening the screw with the set screw,
A large torque could not be transmitted because the contact area between the tip of the set screw and the outer peripheral surface of the shaft was small.

Further, the rotating body fixing device described in the above-mentioned Japanese Utility Model Publication No. 62-6338 does not require machining of the boss or shaft of the rotating body. There is a problem that it takes a long time to perform the operation, and that the tightening bolts are arranged parallel to the shaft, so that an axial working space is required.

Accordingly, the present invention solves the above-mentioned problems in the prior art, and can easily perform an assembling operation in a short time without processing a rotating body or a shaft. It is an object of the present invention to provide a rotating body fixing device that does not need to secure a space, can firmly couple a shaft and a rotating body, has a simple structure, and is easy to manufacture.

[0007]

In order to achieve the above object, a rotating body fixing device of the present invention has an outer peripheral surface fitted into a center hole of a rotating body and a through hole through which a shaft passes. Of 1
An elastically deformable cylindrical enlarged-diameter deforming portion in which a radially expanding slit reaching the through hole is formed at a location, and a tightening hole fitted to the shaft; And an elastically deformable radially contracting deformation portion divided into two parts by a dividing slit crossing in the direction. The radially contracting and deforming portion is disposed adjacent to the radially expanding deforming portion, and the two portions are connected so as to be integrally displaced with both side portions near the radially expanding slit of the radially expanding deforming portion. The two parts are connected to each other by a tightening bolt penetrating through the radial contraction deforming portion so as to cross the split slit on the side opposite to the side connected to the diameter expanding deforming portion. The structure was

A rivet hole is formed in each of the two portions of the radially enlarged deforming portion in the vicinity of the diameter expanding slit and the radially contracted deforming portion. It is preferable that the diametrically enlarged deformation portion and the diametrically contracted deformation portion are connected so as to be integrally displaced by a rivet penetrated between the rivet hole on the portion side. In addition, it is preferable that the radially contracting and deforming portion has a structure symmetrically disposed on both sides of the radially expanding and deforming portion.

Furthermore, an elastically deformable auxiliary diameter contraction having an auxiliary tightening hole fitted to the shaft and having a radially-reduced slit reaching one end of the outer circumferential surface to the auxiliary tightening hole is formed. A deforming portion is disposed adjacent to the diameter-enlarging deforming portion on the side opposite to the side on which the diameter-shrinking deforming portion is adjacent. A reduced-diameter slit reaching the through hole from the surface is cut out, and both side portions near the reduced-diameter slit of the enlarged-diameter deforming portion and both side portions near the reduced-diameter slit of the auxiliary-diameter contracted deforming portion are respectively displaced integrally. It is also preferable to adopt a structure that is connected to.

In this case, the diameter-enlarging deformation part, the diameter-shrinking deformation part, and the auxiliary-diameter shrinking deformation part further include one end face of an elastically deformable cylindrical body having a communication hole in the center portion adapted to the shaft. A first slit inclined from one side of the outer peripheral surface toward the one end surface side to an intermediate position beyond the center of the communication hole, and an outer peripheral surface closer to the other end surface of the cylindrical body; From the side to the intermediate position beyond the center of the communication hole, are divided in a state where they are connected to each other by a second slit which is inclined and cut toward the other end face side, and the diameter-enlarged deformation portion is separated from the communication hole. A through-hole, a tightening hole of the diameter-shrinking deformation part, and an auxiliary tightening hole of the auxiliary diameter-shrinking deformation part are formed, and the first slit of the outer peripheral surface of the cylindrical body intersects with the first slit. From the cutting start position to the position reaching the communication hole The third slit formed in the radial direction forms a half of the split slit of the radially contracted deformation portion, and a reduced diameter slit extending from the radially enlarged deformed portion to the auxiliary radially contracted deformed portion. A fourth slit formed radially from the radially contracted deformation portion to the radially enlarged deformation portion so as to intersect from a cutting start position of the second slit on the outer peripheral surface of the cylindrical body to a position reaching the communication hole. It is also preferable to adopt a structure in which the remaining half of the split slit of the diameter contraction deformation portion and the diameter expansion slit of the diameter expansion deformation portion are formed.

[0011]

When the rotating body is fixed to the shaft, the rotating body fixing tool according to any one of claims 1 to 3 has a through hole of the enlarged diameter deforming portion and a tightening hole of the radially contracting deforming portion. While being inserted into the shaft, the outer peripheral surface of the enlarged diameter deformed portion is fitted into a center hole formed in a boss or the like of the rotating body. Then, after positioning the mounting position of the rotating body with respect to the shaft, when the tightening bolt is tightened with a tool such as a wrench, the portions in the vicinity of the tightening bolt of the diameter contraction deformed portion divided into two by the split slit are attracted to each other. The inner peripheral surface of the fastening hole is pressed against the outer peripheral surface of the shaft.

When the tightening bolt is further tightened, the interval between the divided slits on the side opposite to the side where the tightening bolt penetrates with respect to the tightening hole is elastically deformed and expanded. The interval between the diameter-enlarging slits of the diameter-enlarging deformable portion increases, and the outer peripheral surface of the diameter-enlarging deforming portion is pressed against the inner peripheral surface of the center hole. When the displacement of the radially enlarged deformation portion to the outside of the outer peripheral surface is restrained by the inner peripheral surface, the gap of the enlarged diameter slit cannot be further expanded, and the tightening hole is tightened by the tightening bolt. The inner peripheral surface is strongly pressed against the shaft to fix the radially contracted deformation part and the enlarged diameter deformed part is fixed to the rotating body, so that the shaft and the rotating body are integrally fixed via the rotating body fixing tool. You.

According to a fourth aspect of the present invention, there is provided a rotating body fixing tool, which is inserted into a shaft in the same manner as the above rotating body fixing tool, and the enlarged diameter deformed portion is fitted into a center hole of the rotating body. Tighten the tightening bolts in the assembled state. Then, when the interval between the diameter-enlarging slits of the diameter-enlarging deformable portion is increased, the outer peripheral surface of the diameter-enlarging deforming portion is pressed against the inner peripheral surface of the center hole, and when the displacement is restricted, the through hole or the communication hole is closed. The distance between the reduced diameter slits formed on the opposite side of the enlarged diameter slit is reduced. Then, the interval between the diameter-reducing slits of the auxiliary-diameter contraction-deformation portion integrally connected to the diameter-enlargement deformation portion also decreases,
The inner peripheral surface of the auxiliary tightening hole is pressed against the outer peripheral surface of the shaft, and the rotating body fixing tool is fixed to the shaft on the diameter contraction deforming portion side and the auxiliary diameter contraction deforming portion side. After being fixed, the shaft and the rotating body are integrally fixed via the rotating body fixture.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a first embodiment of a rotating body fixing device of the present invention. The rotating body fixing device 1 is formed in a cylindrical shape from an elastically deformable material such as steel or aluminum.
The slit 2 is divided into a cylindrical enlarged diameter deforming portion 3 and a radial contraction deforming portion 4 by a slit 2 cut in a fan shape in a range of a center angle of about 270 degrees in a diameter direction from one side of the outer peripheral surface.

The diametrically contracted and deformed portion 4 has a tightening hole 5 formed at the center thereof, and is divided into two parts by a split slit 6 which crosses the tightening hole 5 in a substantially diametrical direction.
A tightening bolt 7 is mounted above the tightening hole 5 so as to cross the split slit 6.

FIG. 2 shows a state in which the rotating body 9 is fixed to the shaft 8 by the rotating body fixing tool 1.
FIG. 7 is an axial sectional view at the position of FIG. As shown in the figure, a through hole 10 is formed at the center of the enlarged diameter deforming portion 3 so that the axis thereof is aligned with the tightening hole 5, and the shaft 8 is connected to the tightening hole 5 and the through hole 10. Penetrates. The outer peripheral surface of the enlarged diameter deforming portion 3 is fitted into a center hole 9B of a boss 9A of the rotating body 9.

FIG. 3 is a cross-sectional view taken along the line AA of FIG. 2 and viewed in the direction of the arrow. As shown in FIG. Deformation part 4
A screw hole 13 is inserted into a bolt through hole 11 formed on one side from an outer peripheral surface side through a washer 12, and a screw hole 13 formed on the other side so as to have the same axis as the bolt through hole 11. I agree. A cutout portion 14 for receiving the head of the tightening bolt 7 is formed at the entrance of the bolt through hole 11.

FIG. 4 is a cross-sectional view taken along the line BB in FIG. 2 and viewed in the direction of the arrow. Diameter slit 15
Are cut out in the radial direction. The large diameter slit 1
5 is a tightening bolt 7 for the tightening hole 5 of the split slit 6.
The center of a fan-shaped continuous portion 16 that communicates in the axial direction with a portion opposite to the side on which the traverse crosses and that connects the radially enlarged deformation portion 3 and the radially contracted deformation portion 4 is formed in the radial direction. To 2
I know.

When the rotating body 9 is fixed to the shaft 8 as shown in FIG. 2 by using the rotating body fixing tool 1 described above, the rotating body 9 is fixed to the center hole 9B of the rotating body 9 inserted through the shaft 8. In a state where the outer peripheral surface of the tool 1 on the side of the enlarged diameter deforming portion 3 is fitted, and the rotating body fixing tool 1 is inserted through the shaft 8, the tightening bolt 7 is inserted from the side of the rotating body fixing tool 1 with a wrench or the like. Tighten with a tool.

Then, as shown in FIG. 3, with the rotation of the tightening bolt 7 screwed into the screw hole 13 of the radially contracted deformation portion 4, the split slit 6 through which the tightening bolt 7 penetrates. Are elastically deformed and attracted to each other, and the inner peripheral surfaces on the left and right sides of the fastening hole 5 are pressed against the outer peripheral surface of the shaft 8. When the tightening bolt 7 is further tightened, the interval between the split slits 6 on the side opposite to the side where the tightening bolt 7 penetrates with respect to the tightening hole 5 starts to increase. Along with this, the diameter contraction deformation portion 4 is formed by the continuous portion 16.
The space between the diameter-enlarging slits 15 of the diameter-enlarging and deforming portion 3 connected to the two portions is elastically deformed and expanded.

As shown in FIG. 4, when the interval between the diameter-enlarging slits 15 increases, the outer peripheral surface of the diameter-enlarging deformable portion 3 also expands outward and is pressed against the inner peripheral surface of the center hole 9B of the boss 9A.
In the state shown in FIG. 2, the rotating body 9 is fixed to the enlarged diameter deforming portion 3. And, by the inner peripheral surface of the center hole 9B of the boss 9A,
When the displacement to the outside of the outer peripheral surface of the diameter-enlarging deformation portion 3 is restricted, the diameter-enlarging slit 15 cannot be further widened, and the tightening of the tightening bolt 7 causes the inside of the tightening hole 5 to be closed. The circumferential surface is strongly pressed against the shaft 7 to fix the radially contracted deformation portion 4 to the shaft 8.
And the rotating body 9 are integrally fixed.

As described above, in the present embodiment, the slit 2 is cut into a fan shape with a central angle of approximately 270 degrees in the diametric direction from one side of the outer peripheral surface of the rotating body fixture 1,
Since the continuous portions 16 left in the shape of a fan are formed on both sides of the split slit 6, each continuous portion 16 is easily torsionally deformed, and the elastic displacement of the diameter contraction deformation portion 4 is efficiently transmitted to the diameter expansion deformation portion 3. And the rigidity against the bending load applied to the continuous portion 16 can be increased, so that the angles of the axes between the diameter-enlarging and deforming portions 3 and the diameter-reducing and deforming portions 4 are hardly disturbed, and 9 can reduce the mounting angle error of the axis.

FIGS. 5 and 6 show a second embodiment of the rotating body fixing device of the present invention. FIG. 5 is a perspective view thereof, and FIG. 6 is a side view showing a partially cut-away cross section. is there. In the rotating body fixing tool 21 shown in these figures, the diameter-enlarging deformation portion 23 and the diameter-shrinking deformation portion 24 are arranged adjacent to each other while being separated as independent components. Split slit 26
A rivet hole 28 is formed to penetrate in the axial direction in each part of the diameter contraction deformation portion 24 on the side where the tightening bolt 27 is mounted and on the opposite side across the tightening hole 25. Have been. A rivet hole 29 is formed through the enlarged diameter deforming portion 23 so that the rivet hole 28 is aligned with the axis of the rivet hole 28.
The rivet 30 is penetrated between them.

The rivet 30 is caulked at both ends so that the radially enlarged deforming portion 23 and the radially contracting deforming portion 24 are integrally connected to each other, and the rivet 30 is divided into two by a split slit 26 as in the above-described embodiment. Two portions of the deforming portion 24 are connected so as to be integrally displaced with both side portions of the diameter expanding deforming portion 23 in the vicinity of a not-shown diameter expanding slit. In addition,
The other parts have the same configuration as that of the first embodiment.

FIG. 7 is a perspective view showing a third embodiment of the rotating body fixing device of the present invention. In the rotating body fixing device 31 of the present embodiment, a cut is made in a diameter direction from one side of the outer peripheral surface thereof. The diameter expansion deforming portion 33 is formed
Are formed symmetrically on both sides of the two. The two diameter contraction deformation portions 34A, 34
B and the respective portions of the diameter-enlarging deformation portion 33 are configured in the same manner as in the first embodiment described above.

In this embodiment, the rotating body fixing tool 31 is fitted on a shaft (not shown), and the center hole of the rotating body (not shown) is fitted on the outer peripheral surface of the enlarged diameter deforming portion 33. Diameter contraction deformation portion 34 protruding from both sides of the rotating body
A, 34B tightening bolts 37A, 3 attached to
7B are fastened to fix the rotating body fixing member 31 to each of the shaft and the rotating body.

In this embodiment, the inserting direction of the tightening bolt 37A and the tightening bolt 37B into each of the radially contracted deformation portions 34A and 34B is opposite to each other. Although there is no difference in the fastening performance of the shaft 31 with respect to the shaft, if the direction of the load torque applied to the shaft does not change, the tightening bolt 3
7A and the fastening bolt 37B may be inserted in the same direction.

Next, FIG. 8 shows a fourth embodiment of the rotating body fixture of the present invention.
FIG. 9 is a perspective view showing an embodiment, and FIG. 9 is a side view thereof. In the present embodiment, the rotating body fixing tool 41 includes a slit 42A cut in a diametric direction from one side of the outer peripheral surface thereof, and a slit 42B cut in a diametric direction from the opposite side. It is divided into a diameter contraction deformation portion 44A and an auxiliary diameter contraction deformation portion 44B.

The through-hole 45 is formed in the center of the enlarged diameter deforming portion 43 so as to penetrate the shaft.
The continuous portion 46A left below 2A is continuous with the diameter contraction / deformation portion 44A. Although not shown, the radially enlarged deforming portion 43 is formed with a radially enlarged slit communicating with the through hole 45 from the outer peripheral surface similar to that of the first embodiment described above.

The radially enlarged deforming portion 43 communicates with the split slit 47 formed in the radially contracting deforming portion 44A in the axial direction, and radially communicates with the through hole 45 from one location on the outer peripheral surface. A reduced diameter slit 48 is cut out. The reduced-diameter slit 48 is formed with respect to the through hole 45.
The diameter-enlarging and deforming portion 43 is diametrically divided into two parts by the diameter-enlarging slit and the diameter-reducing slit 48. The diameter-reducing slit 48 does not need to be strictly opposite to the diameter-enlarging slit with respect to the through hole 45, and may be slightly deviated.

The diametrically contracted and deformed portion 44A is the same as that shown in FIG.
The split slit 47 diametrically crosses the tightening hole 49 formed in the center portion and is divided into two portions. With the crossing fastening bolt 50,
The two parts are connected.

An auxiliary tightening hole 51 is formed at the center of the auxiliary diameter contraction deforming portion 44B so as to be coaxial with the through hole 45 and the tightening hole 49. A reduced-diameter slit 52 communicating with the reduced-diameter slit 48 of the enlarged-diameter deformable portion 43 in the axial direction and reaching the auxiliary tightening hole 51 in the radial direction is provided at one location on the outer peripheral surface of the auxiliary-diameter contracted deformation portion 44B. Notch is formed. Both side portions of the diameter-enlarged deforming portion 43 near the reduced-diameter slit 48 and both side portions of the auxiliary-diameter contracted deforming portion 44B near the reduced-diameter slit 52 are connected by a continuous portion 46B so as to be integrally displaced.

In the case of using the rotating body fixing tool 41 of this embodiment, it is inserted into a shaft (not shown) and
The fitting of the center hole of the rotating body (not shown)
Tighten the tightening bolt 50. Then, similarly to the above-described embodiments, the tightening holes 4 of the diameter contraction deforming portion 44A are formed.
9 are pressed against both sides of the shaft,
7, the space between the tightening bolt 50 and the tightening hole 49 is reduced,
Elastic deformation occurs in which the interval on the opposite side increases. As a result, the diameter-enlarging and deforming portion 43, which is integrally connected to the diameter-shrinking and deforming portion 44A at the continuous portion 46A, has a diameter-enlarging slit (not shown) that expands, and its outer peripheral surface is formed on the inner peripheral surface of the center hole of the rotating body. Pressed. When the tightening bolt 50 is further tightened, the diameter-enlarging slit tends to expand further, but the displacement of the outer peripheral surface of the diameter-enlarging deformation portion 43 to both outer sides is prevented by the inner peripheral surface of the center hole. The displacement is made so that the interval between the diameter-reducing slit and the diameter-reducing slit 48 formed on the opposite side of the through hole 45 is reduced. Then, the auxiliary diameter contraction deformation portion 44B integrally connected to the diameter expansion deformation portion 43 at the continuous portion 46B is elastically deformed so that the interval between the diameter reduction slits 52 is reduced, and the inner peripheral surface of the auxiliary tightening hole 51 is formed. Are pressed against both sides of the outer peripheral surface of the shaft. Thus, the rotating body fixing tool 41 is firmly fixed to the shaft at the two locations of the fastening hole 49 and the auxiliary fastening hole 51, and is also fixed to the rotating body at the outer peripheral surface of the enlarged diameter deforming portion 43. In addition, as shown in FIG. 8 and FIG. 9, the diameter expansion deforming portion 43, the diameter contraction deforming portion 44 </ b> A, and the auxiliary diameter contraction deforming portion 44 </ b> B have a step in their outer diameters. All outer diameters may be equal.

Next, FIG. 10 is a perspective view showing a fifth embodiment of the present invention, wherein a rotating body fixing member 61 is an elastically deformable cylinder having a communication hole 62 whose axis is fitted at the center. A first inclined surface cut from one side of the outer peripheral surface near one end surface to a position halfway beyond the center of the communication hole 62 from the one end surface side. And a second slit 63B cut obliquely toward the other end surface from the other side of the outer peripheral surface near the other end surface to a position halfway beyond the center of the communication hole 62 from the other end surface. In this state, it is divided into a radially enlarged deforming portion 64, a radially contracted deforming portion 65A, and an auxiliary radially contracted deforming portion 65B. The first slit 63A and the second slit 63A
The slit 63B is set at an inclination angle of about 30 degrees or less with respect to both end faces of the rotating body fixture 61.

A third slit 66 formed in the radial direction from the cutting start position of the first slit 63A on the outer peripheral surface of the rotating body fixing tool 61 to the position reaching the communication hole 62 so as to intersect with the first slit 63A. A half 66A of the split slit of the diameter contraction deformation portion 65A and the diameter expansion deformation portion 6
4 is a reduced-diameter slit 66 extending from the auxiliary-diameter contraction deforming portion 65B.
B is formed.

The second slit 63 on the outer peripheral surface of the rotating body fixing member 61 extends from the radially contracted deforming portion 65A to the radially enlarged deforming portion 64 so as to intersect with the second slit 63B.
The remaining half 66B of the split slit of the diameter contraction deformation portion 65A and the diameter expansion deformation portion 64 are illustrated by the fourth slit 67 formed in the radial direction from the cutting start position of B to the position reaching the communication hole 62. No large diameter slit is formed.

The enlarged diameter deformation part 64, the diameter contraction deformation part 65A, and the auxiliary diameter contraction deformation part 65B of the rotary member fixing tool 61 of this embodiment are respectively shown in FIGS. 8 and 9 in the fourth embodiment described above. Although it has the same functions as the diameter-enlarging and deforming portion 43, the diameter-shrinking and deforming portion 44A, and the auxiliary-diameter-shrinking / deforming portion 65B shown in FIG.
Since A is cut obliquely, the difference in cross-sectional area between the portion where the tightening bolt 68 penetrates and the other portion is small, the strength can be increased, and the distortion generated when processing the rotating body 61 is suppressed. be able to.

The communication hole 62 becomes the through hole in the above-described fourth embodiment at the position of the diameter-enlarging deformation portion 64, and functions as a tightening hole at the position of the diameter-shrinking deformation portion 65A. At the position of the radial contraction deformation portion 65B, it functions as an auxiliary tightening hole. 11 and 12
FIG. 13 is a plan view showing a modification of the fifth embodiment. The rotating body fixture 61 ′ shown in FIG.
6 ′, the width of the portion 66′A forming the half of the split slit of the diameter contraction deforming portion 65A is larger than that of the diameter reducing slit 66′B of the diameter enlarging deformation portion 64 and the auxiliary diameter contraction deforming portion 65B. Is also formed to be wider. By increasing the width of the portion 66'A that forms the half of the split slit, the tightening margin of the tightening bolt 68 can be increased, and strong fastening can be achieved.

Further, the rotating body fixing tool 61 ″ shown in FIG.
A portion 66 "A of the third slit 66" that forms a half of the split slit of the diameter contraction deformation portion 65A, and a diameter reduction slit 66 "of the diameter expansion deformation portion 64 and the auxiliary diameter contraction deformation portion 65B. This is formed by slightly shifting the portion forming B in the circumferential direction. Note that the portions indicated by the same reference numerals in FIG. 11 and FIG. 12 as those in FIG. 10 have the same functions as those shown in FIG.

In each of the above-described embodiments, the split slit is formed so as to diametrically cross the tightening hole of the radially contracted deforming portion and bisect the radially contracted deforming portion. The direction of the one half of the fastening hole of the split slit and the half of the opposite side may be slightly different, and the width of the split slit may be slightly different in each half.

[0041]

As described above, according to the rotating body fixing device of the present invention, the rotating body can be fixed to the shaft without the need for machining the keyway or the like on the shaft or the rotating body. Since the area of the pressure receiving portion is larger than that of the structure in which the set screw provided on the rotating body side is fixedly fastened to the shaft, the shaft and the rotating body can be firmly fastened to each other.

Further, a pair of tapered rings that are wedge-fitted between both side surfaces of the inner race fitted on the shaft side and the outer race fitted on the rotating body side are tightened in the axial direction with a large number of bolts. The number of bolts to be tightened can be reduced to one or two compared with the conventional rotating body fixing tool, so that the tightening work can be performed in a short time, and the tightening of the tightening bolts Since the work is performed from the side of the shaft, a work space is not required in the axial direction, and the work can be used even in a narrow place. Furthermore, since the number of parts is small and the structure is simple, the manufacturing is easy and the manufacturing cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment of a rotating body fixture of the present invention.

FIG. 2 is a cross-sectional view showing a use state of the rotating body fixing device of the present invention.

FIG. 3 is a cross-sectional view taken along a line AA in FIG. 2 and viewed in a direction indicated by an arrow.

FIG. 4 is a cross-sectional view taken along line BB in FIG.

FIG. 5 is a perspective view showing a second embodiment of the rotating body fixture of the present invention.

FIG. 6 is a side view including a partially cutaway cross section showing a second embodiment of the rotating body fixing device of the present invention.

FIG. 7 is a perspective view showing a third embodiment of the rotating body fixture of the present invention.

FIG. 8 is a perspective view showing a fourth embodiment of the rotating body fixture of the present invention.

FIG. 9 is a side view showing a fourth embodiment of the rotating body fixture of the present invention.

FIG. 10 is a perspective view showing a fifth embodiment of the rotating body fixture of the present invention.

FIG. 11 is a view showing a modification of the fifth embodiment of the rotating body fixture of the present invention.

FIG. 12 is a view showing another modification of the fifth embodiment of the rotating body fixture of the present invention.

[Explanation of symbols]

1,21,31,41,61,61 ', 61''Rotating body fixture 3,23,33,43,64 Diameter enlarged deformation part 4,24,34A, 34B, 44A, 65A Diameter contraction deformation part 5, 25,49 Tightening hole 6,26 Split slit 7,27,37A, 37B, 50,68 Tightening bolt 8 Shaft 9 Rotating body 9B Center hole 10,45 Through hole 15 Enlarged slit 28,29 Riveting hole 30 Riveting 44B , 65B Auxiliary diameter contraction / deformation section 48 Reduced diameter slit 62 Communication hole 63A First slit 63B Second slit 66, 66 ', 66''Third slit 67 Fourth slit

Claims (5)

(57) [Claims] 1. A radially expanding slit which has an outer peripheral surface fitted into a center hole of a rotating body and a through hole through which a shaft penetrates, and which is radially expanded to reach the through hole at one place on the outer peripheral surface. An elastically deformable cylindrical enlarged diameter deforming portion, and a tightening hole fitted to the shaft and elastically deformable divided into two parts by a split slit crossing the tightening hole substantially in the diameter direction. A diameter-shrinking deformation part, wherein the diameter-shrinking deformation part is disposed adjacent to the diameter-enlarging deformation part, and the two parts are connected so as to be integrally displaced with both side parts near the diameter-enlarging slit of the diameter-enlarging deformation part, respectively. The tightening bolt penetrates the radially contracted deformation portion so as to traverse the split slit on the side opposite to the side connected to the radially enlarged deformed portion with respect to the tightening hole.
An apparatus for fixing a rotating body, wherein two parts are connected to each other. 2. A rivet hole is formed in an axial direction at each of two sides of the diameter-enlarging deformation portion near the diameter-enlarging slit and the diameter-shrinking deformation portion. 2. The rotating body fixing according to claim 1, wherein the diametrically enlarged deformation portion and the diametrically contracted deformation portion are connected so as to be integrally displaced by a rivet penetrated between the rivet hole on the side of the enlarged deformation portion. Utensils. 3. The rotating body fixing device according to claim 1, wherein said radially contracting and deforming portions are symmetrically arranged on both sides of said radially expanding and deforming portion. 4. An elastically deformable auxiliary diameter contraction having an auxiliary tightening hole fitted to the shaft and having a radially-reduced slit reaching one end of the outer peripheral surface to the auxiliary tightening hole. A deforming portion is disposed adjacent to the diameter-enlarging deforming portion on the side opposite to the side on which the diameter-shrinking deforming portion is adjacent. A reduced-diameter slit reaching the through hole from the surface is cut out, so that both side portions near the reduced-diameter slit of the enlarged-diameter deforming portion and both side portions near the reduced-diameter slit of the auxiliary-diameter contracted deforming portion are respectively displaced integrally. The rotating body fixing device according to claim 1, wherein the rotating body fixing device is connected to the rotating body. 5. The diameter-enlarging deformation part, the diameter-shrinking deformation part, and the auxiliary diameter-shrinking deformation part include one part of an outer peripheral surface near one end face of an elastically deformable cylindrical body having a communication hole that fits the axis at the center. The first slit cut into the one end face side from the side to the middle position beyond the center of the communication hole, and the center of the communication hole from the other side of the outer peripheral surface near the other end face of the cylindrical body. A second slit cut obliquely to the other end surface side to a middle position beyond the second end surface, and separated from each other by the second slit. A tightening hole of the shrinking deformable portion and an auxiliary tightening hole of the auxiliary diameter shrinking deforming portion are formed, and the communication is performed from a cutting start position of the first slit on the outer peripheral surface of the cylindrical body so as to intersect with the first slit. A third formed radially until it reaches the hole By the lit, a half portion of the split slit of the diameter contraction deformation portion and a diameter reduction slit extending from the diameter expansion deformation portion to the auxiliary diameter contraction deformation portion are formed. From the diameter contraction deformation portion so as to intersect with the second slit. The fourth slit formed in the radial direction from the cutting start position of the second slit on the outer peripheral surface of the cylindrical body to the position reaching the communication hole over the diameter-enlarging deformation portion, thereby forming the split slit of the diameter-shrinking deformation portion. 5. The fixing device for a rotating body according to claim 4, wherein a remaining half portion and a diameter-enlarging slit of the diameter-enlarging deformation portion are formed.