JPS61153017A - Fastening device of shaft and rotary body - Google Patents

Abstract

PURPOSE:To improve torque transmission effect in a device where a pair of intermediate rings are taper fitted to the inner or outer wheel, by coupling the inner wheel and the central section of outer wheel integrally thereby preventing slippage between the inner and outer wheels. CONSTITUTION:Inner and outer wheels 10, 20 are machined from single material and integrated. The intermediate rings 31, 32 are tapered 33, 34 at the inner and outer circumferential faces. The innercircumferential face of the outer wheel 20 is tapered to align with said tapered face 33 while the outercircumferential face of the inner wheel 10 is tapered 11 to align with said tapered face 34. Upon tightening of the intermediate rings 31, 32 in axial direction, taper fitting function is produced in said rings 31, 32 and wheels 10, 20 to pressure contact the inner wheel 10 against the shaft 1 while the outer wheel 20 against the rotary body 2 thus to enable frictional transmission of torque through two pressure contacting sections. Since the inner and outer wheels 10, 20 are coupled integrally in the center, torque transmission effect is improved.

Description

Detailed Description of the Invention H0 Field of Application The present invention relates to a fastening bag S+ for fixing a rotating body to a shaft, in particular a fixing device for transmitting the rotational force of a drive shaft to the rotating body. It is concentric with these, and
It is equipped with one or more rings arranged so as to be tapered fitted with the other party, and when this ring is tightened in the axial direction, the tightening force is applied to the pressure contact force in the radial direction due to the action of the tapered fitting part. As a result, the rotating body and the shaft are fixed in a torque transmitting state by a brush force corresponding to the pressure contact force.

Therefore, this fastening device is useful when fixing a rotating body such as a gear or gooley to a shaft, or when fixing a rotating body such as a gear or a gooley to a shaft, or when fixing a shaft joint at both ends. I.J.
(The II h can be used when connecting the slave f111 sword to the child shaft or slave #h side that is to be transmitted.

1. Prior art and its problems The above-mentioned type of fastening device basically consists of a combination of a ring that is fitted internally on the rotating body side and a ring that is externally fitted on the shaft side. There's a quiz.

[1] Consists of an inner ring aω that is externally fitted onto the shaft (1), and an outer ring ■ that is externally fitted onto this inner ring and internally fitted onto the boss of the rotating body (2),
Those in which the inner ring and outer ring are mutually tapered fitted, for example,
These include those disclosed in Japanese Utility Model Application Publication No. 57-169808 (see FIG. 6) and Japanese Utility Model Application Publication No. 54-1401738.

■, a pair of intermediate rings 01) between the outer ring ■ and the inner ring αω
, ■ are interposed, and these intermediate rings OD and ■ are placed on a tapered stand on both or one of the inner ring or outer ring.

For example, JP-A-50-26946: JP-A-52-14
These examples include those disclosed in Publication No. 389 (see FIG. 7).

However, with these conventional devices, the ratio of allowable transmission torque to the axial tightening force applied to the tightening device is not very large.In other words, in order to obtain the desired transmission torque, a large tightening force is required. .

This is because the rotational force of the shaft is transmitted to the rotating body through the contact surface between the shaft and the fastening device, and the contact surface between the Taber coupling surface 9 in the fastening device and the fastening device. This is because slippage in the front two fastening devices directly causes loss in torque transmission.

In particular, the slope of R is remarkable in the type (2) mentioned above. This is because there is a greater possibility of slippage occurring within the fastening device compared to the fitting parts.

(g) Technical Issues The object of the present invention is to prevent slippage within the fastening device in order to improve the torque transmission effect in the fastening device of the type (①) described above.

4. Technical Means The technical means of the present invention for solving the above problems is that the outer ring (3) and the inner ring (the central part of the IG) are integrally connected.

(5) 0 action The above technical means of the present invention operates as follows.

When the intermediate rings (111, 2) and the inner and outer rings are tightened in the axial direction, the force in the contraction direction is applied to the inner ring aα, and the force in the expansion direction is applied to the outer ring The force of the inner axis Q (1 is the axis (1
), the outer ring is pressed against the rotating body (2) side, and the two press-contact parts become in a torque transmitting state due to frictional force.

Since the outer ring (2) and the inner ring (01) are integrally connected to each other at the center, there is no slippage between them, and the rotational force applied to the inner ring (tlo) directly becomes the rotational force of the outer ring (2) without any loss.

Among them, the present invention has the above-mentioned structure, so it has a first-order unique effect.

The torque transmission effect is improved because there is no slippage between the inner ring (1 (l) and the outer ring (■). Therefore, when obtaining a constant transmission torque, the force required to tighten the intermediate ring is reduced, and a small tightening force can generate a large amount of torque. Transmitted torque will be obtained.

(G), Embodiment Next, to explain the implementation gallery, the first embodiment is that the outer ring ■ is used as a rotating body, and in this case, the outer ring and the rotating body are separate bodies. In this case, slippage between the two does not occur, and the torque transmission effect is further improved.

Next, in the second embodiment, the connecting portion between the outer ring (3) and the inner ring is a press-fitted portion that does not cause slippage in the circumferential direction, and according to this embodiment.

Processing is easy because the inner ring and outer ring can be processed into separate rings.

Next, the third embodiment is that a lubricant or an anti-friction agent is interposed in the tapered fitting portion.

According to this embodiment, since the sliding resistance of the Taper fitting portion is reduced, the tightening force of the intermediate ring can be reduced.

f. Example The outer ring (■) and the inner ring [+[1] of the embodiment shown in Figure 1 are integrated by processing and manufacturing from one material, and the intermediate rings (0311 and ■) are both inner Both the circumference and the outer circumference are tapered surfaces ω, (to), the inner circumferential surface of the outer ring is a tapered surface 2+1 that coincides with the one tapered surface 133), and the outer circumferential surface of the inner ring aO1 is the other tapered surface (133). The tapered surface aD coincides with the material).

Therefore, by forming the tapered holes 0[1 having α11 on the tapered surface in both ## of the ring-shaped member (5) as shown in FIG. 2, the inner ring ai1. The outside M2 is formed, and the two are integrally joined at the center by a partition wall (4) that partitions the tapered hole ■ and the bottom.

In addition, one intermediate ring C1l+ and the other intermediate ring ■ melt (at least several) tightening poles) +51,
+51 is tightened in the axial direction, and one intermediate ring C11l has two through-hole cans corresponding to the number of bolts mentioned above, and a partition wall (41 has the same number of The through hole +4n, Ill is formed in the other tightening ring ω, and the same number of screw holes G61.C1[9 are formed, and each tightening bolt is inserted through the through hole 141 from one insertion hole.
11 into the other screw hole (support).

In addition, in this embodiment, a fly-reducing agent such as molybdenum disulfide is applied between the tapered surfaces (2) and (to) and between the tapered surfaces συ and (to), and the outer ring (5) and the inner ring ( 10
) axial slit in the area outside the partition wall (4))
+12.

(3) is provided so that the tightening force of the tightening bolts 51 and +51 can be reduced. A plurality of slits may be provided in each case.

Next, in the second embodiment shown in Fig. 3, the outer ring is used as a rotating body, and it is also the origin of a chain cuff ring, which is a type of shaft coupling! The l1llf I Kusugu O-ket (2a) or the secondary # side Sugro-kut (2b) are used, and these tin rockets are connected to each other by a double chain (6). In this one, the driving shaft (1a) and the driven wheel (lb
), each Sugerocket is fixed by the action described above, and one and both shafts are connected to the transmission shaft.

Of the above, 1! lG [I and outer ring ■ slits are not necessarily necessary, but large fixing force (transmission torque)
If this is not required, one without slits can be used.

Also, only one of the inner and outer circumferential surfaces of the intermediate ring (toward) and ■ may be a tapered surface, and either this tapered surface or the outer circumferential surface of the opposing inner ring or the inner circumferential surface of the outer ring or the same tapered surface. If so, it works in the same way as described above.

Next, in all of the above embodiments, the inner ring and the outer ring are formed by machining the tapered hole (■), but as shown in Fig. 4, the inner ring αl and the outer ring (■), which have been formed separately in advance, are press-fitted. It is also possible to connect them in a meshing state, and in this case too, only slippage occurs between the inner and outer rings. If the required fixing force is such that the press-fit portion does not slip, it is not necessarily necessary to bring the two into engagement. However, as shown in FIG. 5, a bulge may occur in the center of the outer ring (2) due to press-fitting, so it is advisable to provide a shallow groove around this portion.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view of the first embodiment of the present invention, No. 1 is an explanatory diagram when forming a tapered hole, Fig. 3 is a cross-sectional view of the second embodiment, and Fig. 4 is an inner ring αG and an outer ring. □□□Cross-sectional view of the joint when manufactured as a separate metal body, Figure 5 is an explanatory diagram of a modification thereof,
Fig. 6 and Fig. 7 are explanatory diagrams of conventional examples. ...Rotating body (2a)...Motive force side tin rocket (2b)...
...Sedge rocket ring on the secondary hook side...Tapered surface
C1l+...Intermediate ring■...Tightening ring (to)...Tapered surface (to)...Tapered surface Agent Patent Attorney Yoshihiro Sakagami 2 fig.

Claims (1)

[Scope of Claims] [1] A pair of intermediate rings (31) and (32) are interposed between the outer ring (20) and the inner ring (10), and these intermediate rings (31) and (32) are The outer ring (2
0) and the center part of the inner ring (10) are integrally connected to each other to connect a shaft and a rotating body. [2] The shaft and rotating body fastening device according to claim 1, in which the outer ring (20) is used as a rotating body. [3] The shaft-rotating body fastening device according to claim 1 or 2, wherein the connecting portion between the outer ring (20) and the inner ring is a press-fitted portion that does not cause slippage in the circumferential direction. [4] The shaft and rotating body fastening device according to claims 1 to 3, wherein a lubricant or an anti-friction agent is provided in the tapered fitting portion.