JPH0649945Y2 - Rotating electric machine with brake - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial field of application) The present invention relates to a rotation with a brake in which the structure of a movable member for changing a brake mechanism for rotor braking into a braking state and a releasing state is improved. Regarding electric machinery.

(Prior Art) FIG. 4 to FIG. 6 show the configuration of a conventional electric motor that is a rotary electric machine with a brake. That is, 1 is a frame, 2 is a stator, 3
Is a rotor, 4 is a rotor core, and 5 is a rotating shaft. Reference numeral 6 denotes a brake mechanism, which includes three fixed-side braking plates 7 attached to the frame 1 so as to be movable in the axial direction, and three movable-side braking plates attached to the rotating shaft 5 so as to be movable in the axial direction. 8 and. Reference numeral 9 denotes a movable member made of spheroidal graphite cast iron (FCD40 material), which is integrally rotatable with respect to the rotating shaft 5 of the rotor 3 and is slidable in the axial direction, and one end face portion is A magnetic pole 10 composed of twelve segments located in the field space of the stator 2 is integrally formed at the end of the rotor core 4 side facing the movable side braking plate 8. The movable member 9 is constantly urged in the direction of arrow A by a braking spring 11 to exert a pressing force on the brake mechanism 6 to bring the rotor 3 into a braking state. Further, when the stator 2 is energized, the magnetic flux generated by the stator 2 is transferred from the stator 2 to the magnetic poles 10,
The magnetic disk 12 and the rotor iron core 4 pass through the magnetic path that returns to the stator 2, so that the movable member 9 moves to the braking spring 11
Against the spring force of 1, the rotor core 4 side, that is, in the direction opposite to the arrow A, is attracted to release the pressing force on the brake mechanism 6, and the brake is released.

(Problem to be Solved by the Invention) However, in the above-mentioned configuration, since the movable member 9 itself has a property of easily passing the magnetic flux, a part of the magnetic flux passing through the magnetic pole 10 is indicated by the arrow B when the stator 2 is energized. As shown in the figure, it leaks to the movable member 9 side, and the attraction force for attracting the magnetic pole 10, that is, the movable member 9 to the rotor core 4 side against the spring force of the braking spring 11 decreases. As a result, the spring force of the braking spring 11 for applying the braking force to the brake mechanism 6 cannot be increased, and there is a problem that a sufficient braking force cannot be obtained.

Therefore, an object of the present invention is to provide a rotary electric machine with a brake that can obtain a sufficient braking force by a brake mechanism.

[Means for Solving the Problem] (Means for Solving the Problem) In a rotating electric machine with a brake according to the present invention, a stator is fitted to a frame, the rotor is arranged in the field space of the stator, and a pressing force is applied. A brake mechanism for braking the rotor by receiving it is provided at the end of the frame so as to face the rotor, and a pressing force is constantly applied to the rotor to cause the brake mechanism to act on the rotor when the stator is energized. A movable member that is attracted to the rotor core side of the rotor and releases the pressing force to the brake mechanism is provided so as to be rotatable integrally with the rotor and slidable in the axial direction. , A main part made of a magnetic material that is arranged at the end on the side of the brake mechanism and always moves to the side of the brake mechanism to press the brake mechanism, and the main part is located at the end on the side of the rotor. The stator is connected A magnetic pole made of a magnetic material that is located in the field space and is attracted to the rotor core side to move the main part to the rotor core side when the stator is energized, and to connect the magnetic pole to the main part. It is characterized in that it is composed of an intermediate member made of a non-magnetic material which is interposed between these and prevents the magnetic flux from leaking from the magnetic pole to the main portion side.

(Operation) According to the rotating electric machine with a brake of the present invention, the magnetic flux may leak to the main portion side of the movable member due to the intermediate member made of the non-magnetic material interposed between the main portion of the movable member and the magnetic pole. It will be blocked as much as possible.

(Embodiment) An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

First, in FIG. 3, reference numeral 21 denotes a cylindrical frame of a rotating electric machine, for example, an electric motor, to which a stator 24 formed by winding a winding wire 23 around a stator iron core 22 is fitted, and at both ends thereof, balls are provided. Bearing 25
A bearing bracket 25 in which a is fitted and a bearing bracket 26 in which a ball bearing 26a is fitted are attached. Reference numeral 27 denotes a rotor disposed in the field space of the stator 22, which is configured by press-fitting a rotating shaft 29 in the center of a rotor iron core 28, and the rotating shaft 29 has ball bearings 25a and 26a. Is supported by. The width of the rotor core 28 is smaller than that of the stator core 22, and the rotor core 28 is assembled so that the right ends shown in FIG. 3 are aligned with each other. Reference numeral 30 is a magnetic disk attached to the rotary shaft 29 so as to contact the left end surface of the rotor core 28. Reference numeral 31 denotes a brake mechanism, which is a guide rod 32 provided upright at the end of the frame 21 and a hole 33a formed at the peripheral edge thereof is inserted into the guide rod 32 so that the frame 21 cannot rotate and moves axially. Three fixed-side braking plates 33 that can be attached, an inner peripheral portion of which is fitted to the spline portion 29a of the rotary shaft 29, and a boss 34 that is fitted to the outer peripheral portion of the boss 34 and rotate integrally therewith. And movable in the axial direction and arranged alternately with the fixed-side braking plate 33.
It is composed of a movable side braking plate 35.

Now, 36 is a movable member, which is composed of a main portion 37, a magnetic pole 38 located in the field space of the stator 22, and an intermediate member 39 interposed therebetween. This movable member 36
Will be described with reference to FIGS. 2 and 3. Main part
37 is formed of cast iron (FC15 material) in a drum shape, and the inner spline portion 37a is fitted to the spline portion 29a of the rotary shaft 29 so that the spline portion can rotate integrally with the spline portion 29a and can slide in the axial direction. Has become. A ring-shaped pressing ridge portion 37b is formed on the end surface portion of the main portion 37 on the brake mechanism 31 side and is arranged so as to face the movable side braking plate 35, and a ring-shaped fitting is made on the end surface portion on the rotor iron core 28 side. The ridge portion 37c is formed. The magnetic pole 38 is a multiple of the number of poles of the stator 24, for example, 12 fan-shaped segments 38.
a is evenly arranged in the field space of the stator 24, each segment 38a is made of spheroidal graphite cast iron (FCD40 material),
A fitting protrusion 38b is provided on one surface. Intermediate member 3
9 is a non-magnetic material such as austenitic stainless steel (SUS30
4 materials) are formed in an annular shape, and ring-shaped fitting groove portions 39a, 39b are formed on both surface portions. Then, the movable member 36
Is the fitting groove portion 39a of the intermediate member 39 in the fitting protrusion portion 37c of the main portion 37.
, And the fitting protrusion 38b of each segment 38a of the magnetic pole 38 is fitted into the fitting groove 39b, and then 12 bolts 40 made of a non-magnetic material are formed on the main portion 37 and the intermediate member 39. 12 holes 37d,
It is configured to be inserted through 39c and screwed into the screw hole 38c of the segment 38a. 41 is a braking spring that is fitted to the rotating shaft 29 and is interposed between the magnetic disk 30 and the main portion 37,
The main portion 37, that is, the movable member 36 is always biased in the direction of arrow A.

Next, the operation of the above configuration will be described.

When the winding 23 of the stator 24 is cut off, the braking spring
41 urges the movable member 36 in the direction of arrow A, and the pressing ridge 37
Since b applies a pressing force to the brake mechanism 31 to bring the three movable brake plates 35 into pressure contact with the fixed brake plates 33, respectively, the rotor 27 is brought into a braking state.

When the winding wire 23 of the stator 24 is energized, a part of the magnetic flux from the stator core 22 passes from the stator core 22 to the stator core 22 through the magnetic pole 38, the magnetic disk 30, and the rotor core 28. As a result, the magnetic pole 38 receives the attraction force toward the rotor core 28, that is, in the direction opposite to the arrow A, so that the movable member 36 causes the braking spring 41 to move.
It moves in the direction of the counter arrow A against the elastic force of. As a result, the pressing force applied to the brake mechanism 31 is released, the surfaces of the movable side braking plates 35 are separated from the fixed side braking plates 33, the frictional force between the two disappears, the braking state is released, and the rotor 27 is rotated. It

According to the above embodiment, the following effects can be obtained.

That is, an intermediate member 39 made of a non-magnetic material is provided between the main portion 37 and the magnetic pole 38.
Since the magnetic flux leaks from the magnetic pole 38 to the main portion 37 side through the intermediate member 39, most of the magnetic flux emitted from the stator 24 acts to attract the magnetic pole 38. Therefore, the suction force can be increased. According to an experiment conducted by the applicant, in a 4-pole, 3.7-kW motor, the conventional suction force was 40 kg, but according to the present embodiment, it was possible to increase this to 90 kg. As a result,
Even if the spring force of the braking spring 41 for applying the braking force is set to a large value, the movable member 36 can be reliably attracted and moved toward the rotor 28 against the spring force of the braking spring 41. Therefore, it is possible to obtain a sufficient braking force.

In addition, since the main portion 37 and the magnetic pole 38 are configured separately, the main portion 37
Unlike the magnetic pole 38, a material with good workability such as cast iron can be used for the magnetic pole 38. Therefore, the accuracy of the spline portion 37a can be improved, the main portion 37 can be smoothly moved, and braking can be performed. The operation is stable and the spline part 37
The processing time of a can be reduced, and the cost can be reduced.

Furthermore, since the movable member 36 is configured by connecting the main portion 37, the intermediate member 39, and the magnetic pole 38 with the bolts 40, it is possible to absorb the shock when the movable member 36 is sucked, and the safety and It can improve reliability.

[Advantages of the Invention] In the rotating electric machine with a brake of the present invention, the main part and the movable member for constantly applying the pressing force to the brake mechanism and releasing the pressing force to the brake mechanism when the stator is energized are provided. Since the magnetic poles are arranged at the rotor-side end and the intermediate member made of non-magnetic material is interposed between them, the attraction force of the movable member to the rotor side can be increased and sufficient control can be achieved. An effect that power can be obtained is obtained.

[Brief description of drawings]

1 to 3 show an embodiment of the present invention. FIG. 1 is a sectional view taken along the line I--I in FIG. 2, FIG. 2 is a front view of a movable member, and FIG. FIG. 4 is a longitudinal side view of the whole, FIG. 4 is a view corresponding to FIG. 3 of a conventional example, FIG. 5 is a view corresponding to FIG. 2, and FIG. 6 is a view corresponding to FIG. In the figure, 21 is a frame, 24 is a stator, 27 is a rotor, 28 is a rotor core, 31 is a brake mechanism, 36 is a movable member, 37 is a main part, 38 is a magnetic pole, 38a is a segment, 39 is an intermediate member. , 41 are braking springs.

Claims (1)

[Scope of utility model registration request] 1. A stator fitted to a frame, a rotor provided in a field space of the stator, and an end portion of the frame provided so as to face the rotor, and a pressing force is applied. A brake mechanism that brakes the rotor by receiving it, and a rotor that is integrally rotatable with the rotor and is slidable in the axial direction, and always applies a pressing force to the brake mechanism to fix the stator. A movable member that is attracted to the rotor core side of the rotor to release the pressing force to the brake mechanism when the current is applied to the rotor, and the movable member is disposed at an end portion on the brake mechanism side and is always braked. A main part made of magnetic material that moves to the mechanism side and presses the brake mechanism, and is connected to the main part so as to be located at the end on the rotor side, and is located in the field space of the stator and fixed. With the energization of the child, the rotor Magnetic poles made of a magnetic material that are attracted to the core side to move the main part to the rotor core side, and are interposed between these magnetic poles to connect the magnetic poles to the main part, and the magnetic flux leaks from the magnetic poles to the main part side. A rotary electric machine with a brake, comprising: an intermediate member made of a non-magnetic material that prevents this.