JPS5852853Y2 - rotating electric machine - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a rotating electric machine that prevents rotation of a bearing bracket with respect to a frame, which is applied to a flange-type electric motor such as a heavy-duty brake machine.

Fig. 1 is an upper half sectional front view of a conventional electric motor with a brake, and Fig. 2 is a cutaway top view, in which 1 is a rotating shaft, 2
is a rotary brake plate that applies brakes to the rotating shaft 1, 3 is an electromagnet, and 4 is
is a bearing bracket equipped with an electromagnet 3, 4 and 6 are each bearing brackets, 5 and 7 are a plurality of mounting seats integrated with both side brackets, and this mounting is done by attaching a stud bolt 8 to the center of the seats 5 and 7. into the stator core 1 by inserting it in the axial direction.
The frame 10 into which the T is press-fitted is attached to the both side brackets 4 and 6.
Clamp each with.

Thus, a thread machined at the tip of the stud bolt 3 is formed by tightening and fixing the both side bearing brackets 4 and 6 to the frame 10 with nuts 9.

In the electric motor with a brake having the above-mentioned structure, by applying voltage to the electromagnet 3 after de-energizing the motor during rotation, the rotary brake plate 2 is attracted to the electromagnet 3 and a braking force is generated, and the rotating shaft 1 applies a brake to the rotation of.

At this time, a rotational force equal to the braking force is also applied to the bearing bracket 4, but this rotational force is transmitted from the bearing bracket 4 to the frame 10 by the frictional force caused by the tightening of the spigot fitting surface with the frame 10. However, if the nut 9 is loosened and the frictional force is reduced or eliminated, or if the rotational force of the bearing bracket 4 due to the braking exceeds the frictional force, the bearing bracket 4 will tighten against the frame 10. However, there is a problem in that relative slippage occurs.

In addition, Fig. 2 shows a cutaway top view of the seat 5 and the stud bolt 8 for mounting the bearing bracket shown in Fig. 1. If the magnitude of the rotational force due to the slide is indicated by arrow P, then the diameter of the stud bolt is A bending moment force of PXL is generated at point A at the other end.

Therefore, the stud bolt 8 used in the brake-equipped motor shown in FIG. 1 must be strong enough to withstand this bending moment.

The rotating electric machine of the present invention has been developed in view of the above-mentioned circumstances, and aims to eliminate the bending moment applied to the stud bolt due to the above-mentioned braking, thereby increasing the safety of the stud bolt and providing an economical rotating electric machine. aim at something.

An embodiment of the rotating electrical machine of the present invention is shown in FIGS. 3 and 4.
This will be explained with reference to FIG.

Fig. 3 is a cutaway top view of the rotating electrical machine of the present invention, Fig. 4 is a front view taken along the line IV-IV of Fig. 3 in the vertical direction, and Fig. 5 is a top view of the rotary electric machine of the present invention. This is an assembled perspective view with the outside of the locking seat of the locking fixing bracket cut away.
At one point on the circumference of the bracket 4, a locking pressure 11 separate from the seat 5 is provided for mounting the bracket.

Therefore, with respect to the fin 12 of the frame 10 facing the locking pressure 11, the notch 18 of the locking fixture 13, which has both ends bent in opposite directions and has a notch 18 at one end,
Insert the parts and apply locking pressure 11. Pass the fixing bolts 14 through the holes penetrating each of the locking fixtures 13, tighten and fix the locking fixtures 13 to the locking pressure with the nuts 15, and attach the bearing brackets 4 and 6 on both sides to the frame using the through bolts 8. It is formed by tightening and fixing it to 10.

Next, the functions and effects of the structure of the rotating electric machine of the present invention described above will be explained.

According to the present invention described above, even if the rotational force due to braking is applied to the bearing bracket 4 and the nut 9 loosens, the rotational force P due to relative sliding of the bearing bracket 4 with respect to the frame 10 is reduced, as in the case of the conventional structure described above. Even if it occurs,
As shown in FIG. 3, this rotational force P passes through the locking pressure 11 and the fixing bolt 14, and is applied to the frame 10 via the locking fixture 13.
Since the bending moment is transmitted to the fins 12 and the frame 10, the bending moment has a remarkable feature that no bending moment acts on the point A of the stud bolt 8.

According to the present invention described above, when determining the dimensions and materials when designing the stud bolt, there is no need to consider the bending moment caused by braking force, rotational force, etc., as in the past, and the bolt is both safe and economical. It is possible to provide a rotating electric machine having the following remarkable features.

[Brief explanation of drawings]

Fig. 1 is an upper half sectional front view of a conventional electric motor with a brake, Fig. 2 is a cutaway top view of Fig. 1, and Figs. 3 and 4 are an embodiment of the present invention. FIG. 4 is a cutaway top view of the rotating electric machine shown in FIG. 4, a front view taken along the line IV-IV in FIG. FIG. 3 is a cutaway assembled perspective view. 4.6...Bearing bracket, 5...Mounting seat, 8
... Stud bolt, 11... Locking pressure, 12...
Fin, 13... Locking fixing metal fitting, 14... Fixing bolt, 18... Notch portion.

Claims (1)

[Scope of utility model registration request] The frame is sandwiched between the bearing brackets on both sides of the rotating electric machine, and when installing multiple bearing brackets, the stud bolts inserted through the seats are used to tighten and fix the frame.When installing the bearing brackets, the locking seats adjacent to the seats are used to install the bearing brackets. The notch part of the bent end of the locking fixture is fitted into the opposite fin end, and the fixing bolt is passed through the hole penetrating the locking seat and the locking fixture, respectively, and tightened with a nut. A rotating electric machine characterized in that the locking fixture is fastened to a locking seat to prevent rotation of the bearing bracket with respect to the frame via the locking fixture.