JPS64609Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improved coupling coupling device capable of coupling two rotating shafts with a compact structure.

The first example of a conventional coupling device for a rotating shaft is
This will be explained based on the diagram. This figure shows a coupling device in which a rotating shaft 2a of a rotational speed detector 2 overhanging an end of a rotating electrical machine 1 and an end of a rotating shaft 1a protruding from an end surface of a rotating electrical machine 1 are coupled by a pair of coupling rings 3a and 3b. A stator 4a and a rotor 4b of a rotational speed generator 4 are attached to the end face of the rotating electrical machine 1 and the protruding end of the rotating shaft 1a, respectively. The rotor 4b is fitted into the rotating shaft 1a and then fixed by pressing with a nut 5, and the coupling 3a
and 3b are fixed to the rotating shafts 1a and 2a, respectively, by screwing screws 6 and 7 in the radial direction.
The coupling rings 3a and 3b are individually coupled in advance in order to achieve precision and facilitate assembly.

In such a structure, since the coupling ring 3a is fixed with a radial screw 6, it is necessary to use a nut 5 to press and fix the rotor 4b, which has the disadvantage that the number of parts and installation space increase by the nut 5. It was hot.

In order to eliminate the above-mentioned drawbacks, this invention aims to provide a coupling coupling device for a rotating shaft in which the coupling can be fixed to the rotating shaft with an axial screw so that the coupling can be coupled in a compact structure. do.

This invention is a means to achieve the above objectives.
In a coupling device that connects two rotating shafts with a pair of couplings, one of the couplings is fitted into one of the rotating shafts and fixed by tightening to the end face with a bolt with a hole, and the shaft hole of the other coupling is passed through the coupling device. It is configured to have a size that allows the bolt with a hole to be tightened.

Hereinafter, embodiments of this invention will be described based on the drawings.

FIG. 2 shows a rotary shaft coupling device according to this invention, and the same parts as those in FIG. 1 are designated by the same reference numerals. The coupling device in this figure is a pair of couplings 23, 3b that connect the rotating shaft 2a of the rotational speed detector 2 overhanging the end of the rotating electrical machine 21 and the end of the rotating shaft 21a protruding from the end surface of the rotating electrical machine 21. combined. The coupling ring 23 has an outward flange 23a and an inward flange 23b at one end of a cylindrical body, and the other end of the cylindrical body is fitted into the end of the rotating shaft 21a. This couple ring 23
can be fixed together via the rotor 4b by tightening the flange 23b in the axial direction to the end surface of the rotating shaft 21a with the bolt 26 with a hole. I'm starting to be able to do it. The socket bolt 26 is the third
Fastener 2 formed by bending a square bar as shown in the figure
Tightened at 7. The shaft hole of the coupling ring 3b is passed through and the bolt 26 with a hole is inserted with the fastener 27.
The dimensions are such that it can be tightened.

According to the embodiment, even if the inner diameter of the shaft hole of the coupling ring 3b is smaller than the outer diameter of the head of the bolt with a socket 26, the bolt with a socket 26 can be attached to the coupling ring 23.
If it is assembled with the coupler 3b with the inserted state, it can be tightened in the axial direction through the shaft hole of the coupler 3b.
can be fixed by pressing it against the rotating shaft 21a. For example, as a bolt with a hole 26, JIS B
Using a 1176 hexagon socket head bolt with a thread size of M6,
If a JIS B 4648 hexagonal wrench with nominal size 5 is used as the corresponding fastener 27, the diagonal dimension of the wrench is at least 5.6 mm and at most about 5.8 mm, so the rotating shaft 2a is as thin as 5.8 mm. This eliminates the need to make the shaft diameter of the rotational speed detector 2, which is originally extremely compact, larger than necessary.

As described above, according to this invention, in a coupling device that couples two rotating shafts with a pair of coupling rings, one of the coupling rings is fitted into the other rotating shaft and is fixed by tightening it to the end face with a socket bolt. Since the shaft hole of the other coupling ring is dimensioned so that the bolt with a socket can be tightened through the shaft hole, the following effects can be obtained.

1. Since the mounting parts other than the coupling mounted on the rotating shaft on one side of the coupling ring are pressed in the axial direction and fixed at the same time, there is no need for a fixing member for the mounting parts, and the axial length can be shortened.

2. Not only is the number of parts reduced, but the number of man-hours is reduced as only the bolts with holes are tightened instead of the nuts 5 and screws 6 shown in Figure 1, creating an environment that is easy to work in and improving the reliability of the work. improves.

3. The coupling ring can be assembled as a pair in advance before installation on the two rotating shafts.
There is no need to assemble the coupling, which is a detailed work, in parallel with the attachment to the rotating shaft.

4. Since the shaft hole of the other coupling ring can be made thinner, the diameter of the shaft of the detector, etc. to be attached to the other coupling ring does not need to be made thicker than necessary, so the detector can be made compact with its original dimensions. It can be made into something.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view showing a conventional coupling device for a rotating shaft, Fig. 2 is a longitudinal sectional view showing a coupling device for a rotating shaft according to this invention, and Fig. 3 is a longitudinal sectional view showing a coupling device for a rotating shaft according to the present invention. It is a front view showing an attachment. 2a, 21a...rotating shaft, 3b, 23...coupling, 26...bolt with hole.

Claims (1)

[Scope of utility model registration request] In a coupling device that connects two rotating shafts with a pair of couplings, one of the couplings is fitted into one of the rotating shafts and fixed by tightening to the end face with a bolt with a hole, and the shaft hole of the other coupling is passed through the coupling device. A rotary shaft coupling device characterized by having a size that allows tightening of a bolt with a hole.