JPH0452489Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial field of application and overview of the invention) The present invention is a rotating body fixing device, especially a shaft hole of a rotating body such as a gear (a hole for accommodating a rotating body fixing device, the same applies hereinafter). ) and the shaft so that the outer ring is inscribed in the shaft hole, and the inner ring is externally connected to the shaft, a tightening ring is inserted inside the inner ring, and this tightening ring is tightened with a tightening bolt. , relates to a rotating body fixing device that presses the inner surface with the shaft hole and the outer surface with the shaft, and fixes the rotating body and the shaft using the frictional force caused by this pressure contact, and integrates the inner ring and the outer ring. This allows the rotating body and the shaft to be installed accurately in their mutual positions, and does not require skill for this accurate installation.

(Prior Art and its Problems) The structure of a conventional rotating body fixture of this type will be explained based on FIGS. 5 to 7.

This includes an inner ring 1 having tapered surfaces facing away from each other on both sides of the outer peripheral surface in the axial direction, an outer ring 2 having tapered surfaces facing away from each other on both sides of the inner peripheral surface in the axial direction, and furthermore, A pair of tightening rings 3a, 3b which are inserted between the surfaces and have tapered surfaces matching the tapered surfaces on the inner and outer peripheries, and a plurality of tightening bolts 4, 4 which are screwed between these tightening rings. These tightening bolts are designed to pass through between the top 11 of the outer peripheral surface of the inner ring 1 and the top 21 of the inner peripheral surface of the outer ring 2 in the assembled state and in the used state. (Fig. 6) In addition, in order to reduce the inner ring 1 and enlarge the outer ring 2 by tightening the tightening bolts 4, 4, these inner rings 1
And a part of the outer ring 2 is in an open state.

When using this product, set the inner ring 1, outer ring 2, and tightening rings 3a, 3b, temporarily tighten the tightening bolts 4, 4, and connect the rotating body fixing device between the shaft hole of the rotating body and the shaft. Insert it between the two, and then securely tighten the tightening bolt.

However, this conventional rotating body fixing device has a problem in that it requires skill to mount the rotating body so that the rotating body does not run out or eccentrically.

This is because the inner and outer rings have an open part at one place, and the inner and outer rings are easily bent as shown in Fig. 7, and the inner ring 1, outer ring 2, and tightening rings 3a and 3b are in the proper relative position in the temporarily tightened state. This is because the tightening ring 3a,
This is because eccentricity of 3b and deflection of the inner and outer rings are likely to occur.

As a solution to this problem,
There is a method disclosed in Japanese Patent No. 14389, in which an annular flange portion is protruded from the center of the outer circumferential surface of an inner ring, a pair of outer rings are axially opposed to the annular flange portion, and a tightening bolt passes through the flange portion. A pair of tightening rings interposed between the inner ring and the outer ring are tightened together in the axial direction. Therefore, the end surface of the outer ring that is in contact with the inner peripheral surface of the boss comes into contact with the flange, and even if a slit is cut in a part of the outer ring, the outer ring is always set in a proper posture. maintained.

However, in this conventional type, since the outer ring and the inner ring are separated, there is a possibility that slippage may occur between the outer ring and the tightening ring, and there is a problem that large torque cannot be transmitted.

(Problem) The present invention has an inner ring 1 having tapered surfaces facing away from each other on both sides of the outer peripheral surface in the axial direction, and an outer ring 2 having tapered surfaces facing away from each other on both sides of the inner peripheral surface in the axial direction, The rotating body is fixed to the shaft by shrinking the inner ring 1 and expanding the outer ring 2 by inserting and tightening the tightening rings 3a and 3b, which have tapered surfaces that match these tapered surfaces, between the tapered surfaces. The object of the present invention is to provide a fixing device that can be properly and easily attached to a rotating body as a shaft, that can transmit a large amount of torque, and that the durability of the fixture can be improved even in this high torque transmission state.

(Means) The technical means of the present invention taken to solve the above problems is as follows: ``The center parts of the inner ring 1 and the outer ring 2 are integrally connected to each other by the partition wall 5, and the inner ring 1 and the outer ring 2 are In addition to making the slope of the tapered part gentle,
A plurality of slits 7, 7 are provided in the parts of the inner ring 1 and outer ring 2 other than the partition wall 5 in parallel with the axis, and the slits 7, 7 are located on the opposite side with the partition wall 5 in between.
7 are shifted from each other in the circumferential direction.

(Operation) The above technical means of the present invention operates as follows.

Since the inner ring 1 and the outer ring 2 are connected and integrated, their relative positions are fixed. Therefore, in this rotating body fixing tool, the inner ring 1 and the outer ring 2 are not twisted even when temporarily tightened.

Also, after inserting the rotating body fixing device between the shaft and the shaft hole of the rotating body, it is tightened with a tightening ring, but at this time, since the inner ring 1 and the outer ring 2 are integrally connected, normally each It does not shrink or expand. However, in this case, since the inner ring 1 and the outer ring 2 are provided with a plurality of slits 7, 7, when the tightening ring is tightened, the inner ring 1 is contracted and the outer ring 2 is expanded, and the same as in the conventional example described above. It is pressed against the shaft or shaft hole and becomes in a torque transmitting state. At this time, stress tends to concentrate on the inner ring 1 and outer ring 2 near the proximal ends of the slits 7, 7, that is, the partition wall 5, due to the force exerted by the sliding resistance acting on the pressure contact portion of each tapered surface. Since the slits 7, 7 located on opposite sides of the wall 5 are offset in the circumferential direction, there is no fear that stress concentration points will coincide on both sides of the partition wall 5.

Furthermore, in this torque transmission state, the inner ring 1
The torque acting on the outer ring 2 is transmitted to the outer ring 2 via a path via the tightening rings 3a and 3b, and also directly to the outer ring 2 via a path via the partition wall 5.
In other words, torque is transmitted through two paths. Furthermore, since the outer ring 2 is integral with the partition wall 5, no slipping occurs between the outer ring 2 and the tightening rings 3a, 3b.

(Effects) Since the present invention has the above configuration, it has the following unique effects.

The torque acting on the inner ring 1 is transmitted by the tightening ring 3a,
3b and the partition wall 5, and there is no slippage between the inner ring 1 and outer ring 2 and the tightening rings 3a and 3b. , transmission torque can be increased.

Furthermore, the slits 7, 7 are essential to enable torque transmission under the condition that the partition wall 5, the inner ring 1, and the outer ring 2 are integrated, and stress concentration tends to occur at the base end of the slit 7; Since the concentration points do not coincide on both sides of the partition wall 5 and are dispersed throughout, a decrease in durability due to stress concentration can also be prevented.

(Example) An example of the present invention will be described based on FIGS. 1 to 4.

In this device, six tightening bolts 4, 4 are used to tighten the tightening rings 3a, 3b, and these are arranged at equal intervals on the circumference, and a pair of tightening bolts 4, 4 are arranged on the diameter line as shown in Fig. 1. The dispersion bolts 6a, 6a and another pair of dispersion bolts 6b, 6b are located between the tightening bolts 4, 4. As shown in FIG. 4, the tightening bolts 4 pass through one tightening ring 3a and are screwed into the other tightening ring 3b. Further, one dispersion bolt 6a is screwed only into one tightening ring 3a, and the other dispersion bolt 6b is penetrated through a hole formed in one tightening ring 3a and is screwed into the partition wall 5. and faces the inner end surface of the other tightening ring 3b.

Furthermore, the inner ring 1 and the outer ring 2 are provided with slits, 4 on each side, a total of 8 slits on both sides, and the slits on both sides are arranged in circles between the slits on one side and those on the other side so that they are not in a straight line. The position in the circumferential direction is shifted. (See Figure 2) When using this, tightening ring 3a,
3b is temporarily tightened with the tightening bolts 4, 4, and inserted between the shaft holes of the shaft A and the rotating body B, and then the tightening bolts 4,
4 to the specified torque, tightening rings 3a, 3
b is press-fitted between the inner and outer rings to reduce the inner ring 1,
Also, the outer ring 2 is expanded.

Next, in order to remove this, one of the dispersion bolts 6a is screwed in, so that its end surface comes into contact with the partition wall 5, and this causes one of the tightening rings 3a to move in the axial direction, allowing the tapered portion to fit. is relaxed.

When the other disassembly bolt 6b is screwed in, its tip comes into contact with the inner end surface of the other tightening ring 3b,
This tightening ring 3b is pushed outward. This loosens the fit of the tapered portion. As a result of the above, the fitting between the shaft A and the rotating body B is loosened.

In this case, since the slits on both sides of the partition wall 5 are not aligned in a straight line and are shifted, the stress generated at the base end of the slit when the tightening bolt is tightened to the final state is difficult to concentrate in one part, and the partition wall Inconveniences such as damage to the inner and outer rings in the vicinity of 5 do not occur.

[Brief explanation of drawings]

Fig. 1 is a front view of an embodiment of the present invention, Fig. 2 is a side view thereof, Fig. 3 is a sectional view taken along line XX in Fig. 1, and Fig.
The figure is a Y-Y sectional view of the used state in Fig. 1, Fig. 5 is an explanatory diagram of the conventional example, Fig. 6 is an explanatory diagram of its operating state, and Fig. 7 is a flexural diagram of the outer ring 2 in the conventional example. It is a side view showing the state, and in the figure, 1... Inner ring, 2... Outer ring, 5... Partition wall, 7...
...Slit.

Claims (1)

[Scope of utility model registration request] An inner ring 1 having tapered surfaces facing away from each other on both sides of the outer circumferential surface in the axial direction, and an outer ring 2 having tapered surfaces facing away from each other on both sides of the inner circumferential surface in the axial direction, and a tapered surface matching these tapered surfaces. By inserting and tightening the tightening rings 3a and 3b between the tapered surfaces, the inner ring 1 is reduced and the outer ring 2 is enlarged. They are integrally connected to each other by a partition wall 5, and the taper portions of the inner ring 1 and outer ring 2 have a gentle slope, and a plurality of inner rings 1 and outer rings 2 are provided in a portion other than the partition wall 5 parallel to the axis. A rotary body fixture in which slits 7, 7 are provided, and the slits 7, 7 located on opposite sides of a partition wall 5 are offset from each other in the circumferential direction.