JP2558607Y2 - Shaft and rotating body fastening device with retaining ring - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a device for fastening a shaft and a rotating body without using a key, and in particular, has a through slit in the axial direction.
That the outer ring which is formed in the tapered surface and the axial direction of Sri
The wedge-shaped engagement of the tapered surface formed on the inner ring with the slit in the axial direction expands the outer ring, reduces the inner ring, and firmly fastens the shaft and the rotating body by the generated surface pressure. Related to the device.

[0002]

2. Description of the Related Art FIGS. 8 and 9 show conventional shaft and rotary body fastening devices 60 and 70 of this type. Each fastening device 6
Numerals 0 and 70 have outer rings 62 and 72 having inner peripheral side tapered surfaces 61 and 71 and inner rings 64 and 74 having outer peripheral side tapered surfaces 63 and 73. The outer ring 62, 72 and the inner ring 64 and 74, both Li
By tightening the tightening bolts 65 and 75 inserted in the ring, the shafts are relatively moved in the axial direction. Due to the wedge action of the tapered surface, the outer rings 62 and 72 are expanded by the axial through slits , and the inner rings 64 and 74 are formed in the axial direction.
Reduce by slit . As a result, the shaft A and the rotating body B are firmly fastened by the surface pressure. Inner rings 64, 7
4 is a flange portion 66, larger in diameter than the inner diameter of the mounting shaft insertion hole of the rotating body B and the outer diameter of the outer rings 62, 72.
76. The flanges 66 and 76 are the side ends of the rotating body B
Abut against the surface to prevent its axial movement during fastening.

[0003] However, the entire fastening device, taken of the rotating body B
It is desirable to use it completely stored in the shaft insertion hole
In such a case, in the above-described fastening devices 60 and 70, since the flange portions 66 and 76 are larger than the inner diameter of the mounting shaft insertion hole of the rotating body B, the fastening device 6 is inserted into the mounting shaft mounting hole of the rotating body B.
It cannot be used to completely store 0,70. In order to prevent the axial movement of the rotator B and to allow the fastening device to be accommodated in the mounting shaft insertion hole of the rotator B, compatibility is provided as shown in FIG.
Is a fastening device 80 shown in FIG. In this fastening device 80, the outer diameter of the flange portion of the inner ring 84 is
Tsukejiku instrumentation be substantially the same as the outer diameter of the outer ring 82 so as to be accommodated in the entry apertures, off of the inner ring 84
An annular spacer 88 for positioning the rotating body B fits into a step 87 formed in the flange.

[0004] However, when trying to use housed in the mounting JikuSo in hole of the rotating body B without using the space <br/> support 88 the fastening device 80 of FIG. 10, remove all tightening bolts The spacer 88 must be removed
That task is quite cumbersome. Further, such a spacer 88 requires considerable man-hours for processing.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method of preventing rotation of a rotating body in an axial direction, and a mounting shaft mounting hole for the rotating body.
Can use that housed within, moreover, it is to provide a fastening device that can change these use easily.

[0006]

SUMMARY OF THE INVENTION The present invention provides a method for mounting a rotating body.
The outer cylindrical surface and the inner tapered surface that fit inside the shaft insertion hole
An outer ring having a slit penetrating in the axial direction, an inner peripheral cylindrical surface externally fitted to the mounting shaft of the rotating body, and an outer peripheral tapered surface complementary to the tapered surface of the outer ring . An inner ring having a slit ,
A tightening bolt for engaging the two tapered surfaces with a wedge is
A fastening device for a shaft and a rotating body that is inserted through an outer ring and an inner ring , wherein the inner ring is provided in a mounting shaft insertion hole of the rotating body on a side having a larger diameter of a tapered surface thereof.
A flange portion having a slightly smaller outer diameter than the diameter provided,
The flange portion has an annular groove on the outer peripheral surface, and is mounted on the annular groove .
The outer diameter at the time of attachment is larger than the inner diameter of the mounting shaft insertion hole of the rotating body.
This problem has been solved by a fastening device in which a retaining ring is detachably mounted .

[0007]

When the tightening bolt is tightened, the outer ring and the inner ring relatively move in the axial direction. Each tapered surface engages a wedge, and the outer ring has an axial through slit.
More expansion, the inner ring is reduced <br/> small by the axial slit, the shaft and the rotating body, tightening the surface pressure resulting generated
Is done . Torque is transmitted by frictional force.

[0008] During the tightening operation, the rotating body is dragged by the outer ring and tends to move in the axial direction. However, since the retaining ring contacts the side end face of the rotating body, the rotating body is prevented from moving in the axial direction. In this way, it is possible to perform the fastening by positioning the rotating body in the axial direction.

[0009] The fastening device of the present invention is used to mount the rotating shaft to a mounting shaft.
To completely house it inside , just remove the retaining ring. In relation to the rotating body, the inner ring is selected such that the outer diameter of the flange portion is slightly smaller than the inner diameter of the mounting shaft insertion hole of the rotating body, and the outer diameter of the outer ring is the same. It is easy to change the usage to completely store the fastening device in the mounting shaft insertion hole . Since the retaining ring is easily removable, there is no need to disassemble the fastening device itself.

[0010]

1 and 2 show a first embodiment of a tapering type fastening device according to the present invention. This fastening device 10
Has an outer ring 12, an inner ring 13, a number of fastening bolts 14, and a retaining ring 15.

The outer ring 12 is a shaft mounting for a rotating body.
Outer peripheral cylindrical surface 21 and inner peripheral taper surface 22 that fits inside the inlet
And 24 is a through slit in the axial direction . The slit 24 gives the outer ring 12 flexibility. 2
5 is a screw hole.

The inner ring 13 is attached to a rotating body mounting shaft.
It has an inner cylindrical surface 31 to be fitted and an outer tapered surface 32 complementary to the tapered surface 22 of the outer ring 12.
The inner ring 13 has a flange portion 33 formed on the larger diameter side of the tapered surface 32. The outer diameter of the flange portion 33 is slightly smaller than the inner diameter of the mounting shaft insertion hole of the rotating body B. The same applies to the outer diameter of the outer ring 12. Code 34
Are a plurality of slits formed in the tapered portion in the axial direction. The slit 34 provides flexibility to the portion where the tapered surface 32 is formed. Note that such a slit 34 can be replaced with one slit formed in the axial direction. Reference numeral 35 is a through hole for the bolt 14.
Reference numeral 35 'denotes a screw hole for screwing a bolt (not shown) for disassembling the fastening device.

The flange portion 33 has an annular groove 36 on the outer periphery. The retaining ring 15 is fitted into the annular groove 36.
When the retaining ring 15 is attached to the annular groove 36,
The diameter is larger than the inner diameter of the mounting shaft insertion hole of the rotating body, and comes into contact with the side end surface of the rotating body B (FIG. 3). The retaining ring 15 is substantially C-shaped. Jig holes 51 for expanding are formed at both ends. The retaining ring may have any shape other than the C-shape as long as it can be easily attached and detached.

FIG. 3 shows a method of use in the case where the rotating body B is prevented from moving in the axial direction. By tightening the tightening bolts 14, the respective tapered surfaces 22, 32 are wedge-engaged. The outer ring 12 is expanded by the slit 24 so that the rotating body B
Is pressed against the inner circumference of the mounting shaft mounting hole . On the other hand, the inner ring 13 is contracted by the slit 34 and pressed against the outer periphery of the mounting shaft A. At this time, the outer ring 12 moves in the axial direction with respect to the inner ring 13, and the rotating body B also tries to move in the same direction. However, the retaining ring 15 is on the rotating body B side.
Since the rotating body B is in contact with the end face , the rotating body B is prevented from moving in the axial direction. As a result, the rotating body B is positioned with respect to the axis A.

FIG. 4 shows how the fastening device 10 is completely housed in the mounting shaft insertion hole of the rotating body B. When the state shown in FIG. 3 is changed to the state shown in FIG. 4, it is sufficient to simply remove the retaining ring 15. However, in this case, the retaining ring 1
5 Requires special jigs for expansion.

FIGS. 5 to 7 show a second embodiment of the fastening device according to the present invention. The fastening device 11 includes an outer ring 12, an inner ring 13, and a number of tightening bolts 1.
4 and a retaining ring 16. Outer ring 1
2. Since the configurations of the inner ring 13 and the tightening bolt 14 are the same as those of the first embodiment, the description is omitted.

The retaining ring 16 fitted in the annular groove 36 has a spiral shape laminated in the axial direction in this embodiment. When the spiral retaining ring 16 is fitted in the annular groove 36, the outer diameter thereof is
On the side of the rotating body B , which is larger than the inside diameter of the mounting shaft mounting hole of the rotating body
It comes into contact with the end face . At both ends of the spiral,
A notch 52 is formed. The notch 52 is used when removing the retaining ring 16 from the annular groove 36. In this case, unlike the case of the first embodiment, the detaching operation can be performed with a general tool such as a screwdriver.

The retaining ring 16 is formed by laminating thin plates.
The strength is substantially the same as that of the first embodiment. However, since the thin plate is rich in flexibility, it can be easily attached and detached.

[0019]

[Effects of the Invention] Since the fastening device of the present invention has the above configuration, it can be used for preventing the rotation of the rotating body in the axial direction and for completely storing the fastening device in the mounting shaft insertion hole of the rotating body. Either is possible.

[0020] The above usage can be changed only by attaching and detaching the retaining ring. There is no need to remove all the tightening bolts as in the conventional fastening device.

The fastening device of the present invention is also advantageous in terms of manufacturing costs. That is, the inner ring can be machined from a material having a relatively small outer diameter with respect to the fastening device of FIGS. 8 and 9, and a relatively simple retaining ring is used for the spacer of the fastening device of FIG. As a result, manufacturing costs can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view of a first embodiment of a fastening device according to the present invention;

FIG. 2 is a sectional view of the fastening device of FIG. 1 after assembly.

FIG. 3 is a cross-sectional view of the fastening device showing how to prevent the rotating body from moving in the axial direction.

FIG. 4 is a sectional view of the fastening device completely housed inside the rotating body.

FIG. 5 is a perspective view of a second embodiment of the fastening device according to the present invention;

FIG. 6 is a front view of a retaining ring used in the fastening device of FIG. 5;

FIG. 7 is a top view of the retaining ring of FIG. 6;

FIG. 8 is a sectional view of a conventional fastening device.

FIG. 9 is a sectional view of another conventional fastening device.

FIG. 10 is a sectional view of still another conventional fastening device.

[Explanation of symbols]

 A axis B rotating body 10 fastening device for shaft and rotating body 12 outer ring 13 inner ring 14 bolt 15 retaining ring 21 outer cylindrical surface 22 inner tapered surface 31 inner cylindrical surface 32 outer tapered surface 33 flange portion 36 Annular groove

Claims (3)

(57) [Scope of request for utility model registration] 1. A pickpocket passing through the outer circumferential side cylindrical surface and the inner peripheral side tapered surface internally fitted in a shaft direction to the rotation of the mounting JikuSo in hole
An outer ring having a slot and a mounting shaft for the rotating body.
An axial slit having an inner peripheral cylindrical surface to be externally fitted and an outer peripheral taper surface complementary to the taper surface of the outer ring.
And a tightening bolt for wedge-engaging the two tapered surfaces with the outer ring and the inner ring.
A shaft and fastening device for a rotary body formed by inserting the knurling, the inner ring is the on the side comprising the large diameter of the tapered surface
Has an outer diameter slightly smaller than the inner diameter of the mounting shaft mounting hole of the rotating body
A flange portion provided with an annular groove on the outer peripheral surface, and the outer diameter when mounted in the annular groove is the mounting of the rotating body.
Characterized <br/> that large consisting stopper plate wheels than the inner diameter of JikuSo in hole and detachably mounted, the shaft and the rotating body fastening device. 2. The fastening device according to claim 1, wherein the retaining ring is C-shaped. 3. The fastening device according to claim 1, wherein the retaining ring has a spiral shape laminated in the axial direction.