JP2001238409A - Brush holder and dynamo-electric machine having the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a brush holder which will bring about vibration or noise due to abnormally exciting force of a brush during an operation and a dynamo-electric machine having the same. SOLUTION: A fixing plate 15a of a cover plate 25 is placed on a base plate 11b of a brush holder mount 11. A caulked protrusion 14a and a positioning protrusion 14c of a contour frame 24 are respectively inserted into its caulked protrusion insertion port 15c and a positioning protrusion insertion port 15d. Then a stopper protrusion 14b is made to against with the plate 15a and an oblique surface of a trapezoidal recess 14a is pressed by a pressing protrusion 25b to form a case-like brush holder 23. The protrusion 14a next inserted into a caulked hole 11c of the plate 11b. Its end caulked to the plate 11b, so that an integrated brush holder 28 having a high rigidity in both axial circumferential directions in completed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brush holding device which suppresses vibration and noise generated by a vibrating force generated by sliding of a commutator and a brush, and a rotating electric machine having the same.

[0002]

2. Description of the Related Art FIG. 18 is a cross-sectional view showing the structure of a conventional 4-pole DC motor, and FIG. 19 is a cross-sectional view as viewed in the XIX-XIX direction in FIG. As shown in FIG. 18, a conventional DC motor 1 has a magnet 3 mounted in a yoke 2.
The armature 5 and the commutator 6 each comprising an armature core 5a and an armature winding 5b wound around the armature iron core 5a, which are separated from each other by a gap 4, are attached to a rotating shaft 7, and the armature winding 5b and commutator 6 are electrically connected in a predetermined manner, and rotating shaft 7 is rotatably supported by bearings 8 and 9. Reference numeral 10 denotes a bracket for supporting the bearing 8, which is flange-connected to an end of the yoke 2 on the shaft end side. An outer peripheral portion of an annular plate 11a of the brush retainer mounting body 11 is loosely fitted to an inner inner peripheral portion of the bracket 10. The board 11 b is fixed to the inner side wall of the bracket 10 with mounting bolts 12. Then, a box-shaped brush holder 13 opened on the outer peripheral side of the commutator 6 is attached by caulking (not shown) to the substrate 11b of the brush holder mounting body 11, and as shown in FIG. The brushes 17, which are disposed at four locations and are pressed by springs 16, are mounted in the brush holder 13, and are slid on the outer circumference of the commutator 6. 17a is a pigtail for supplying an external current to the brush 17. Here, the brush retainer mounting body 11
The brush holder 18 includes the brush holder 13 and the brush holder 13.

FIG. 20 is a view showing the construction of the above-mentioned conventional brush holding device. FIG. 20A is a perspective view showing the construction of the brush holder, and FIG. FIG. As shown in FIG. 20 (a), the brush retainer 13 is configured by combining an enclosing frame 14 and a cover plate 15, and the enclosing frame 14 is formed in a U-shape by a central plate 14e and both side plates 14f. It is assembled in a state opened toward 15. On the side of the surrounding frame 14 to be combined with the cover plate 15, there are two caulking protrusions 14a, and four stopper protrusions 14b which come into contact with the cover plate 15 at the time of combination.
Four positioning protrusions 14c are provided, and an outlet 14d for the pigtail 17a of the brush 17 is opened in the center plate 14e on the opposite side of the combination. The cover plate 15 includes a fixed plate 15a and a spring support plate 15b.
5a is provided with two caulking projection insertion openings 15c and four positioning projection insertion openings 15d, and they are combined with each other along the alternate long and short dash line to form a box-shaped brush holder 13, and FIG. As shown in (b), the tip of the caulking projection 14a is inserted into the caulking hole 11c of the substrate 11b of the brush holder mounting body 11 and firmly mounted, and the brush holder 13 and the brush holder mounting body 11 are integrated. A brush holding device 18 is formed. Then, the brush retainer mounting body 11 is fixed to the inner wall surface of the bracket 10 with mounting bolts 12 as shown in FIG.
The brush 17 is mounted in the brush holder 13 as shown by a dashed line in FIG.

[0004]

FIG. 21 is an explanatory view of the vibration generated in a conventional brush holding device.
(A) is a cross-sectional view as seen in the XXI-XXI direction of FIG. 20 (b), and FIG. 21 (b) is an explanatory view of vibration of the brush holder. In a DC motor, the brush 17 may generate a large excitation force due to sliding with the commutator 6.
Speed, finishing accuracy, number of segments or commutator 6
Always fluctuates under the influence of the frictional force between the
Pitching vibration in which the brush 17 oscillates on the commutator 6 in the axial direction, yawing vibration in which the brush 17 oscillates in the circumferential direction on the commutator 6, or a vibration mode based on a combination of these (striking). Etc. are known. However, the conventional brush holding device 18
Is the cover plate 1 constituting the brush holder 13 as described above.
Although the fixing plate 15a of No. 5 is firmly caulked to the brush holder mounting body 11, the brush holder 13 has a rigidity in the circumferential direction because the circumferential support is constituted only by the stopper projection 14b. Slightly weak, brush 17 while driving
When a large abnormal excitation force acts on the brush holder 13, vibrations due to circumferential deformation of the brush holder 13 may occur. That is, as shown in FIG.
Assuming that the point of intersection between the brush holder mounting body 11 and the upper surface of the substrate 11b is point A, the brush holder 13 is fixed at the point A by the vibrating force as indicated by an angle B shown by a dotted line in FIG. There is a problem in that a large right and left displacement is caused to cause vibration, which may appear as noise during operation of the motor.

[0005] As a method for suppressing the vibration generated due to the sliding between the commutator and the brush as described above and the noise caused by the vibration, for example, there is a method described in JP-A-10-304625. Attaching a plate and interposing a vibration absorbing material between the vibration isolating plate and the substrate, damping the brush vibration by deforming or moving the vibration absorbing material when the brush vibrates and the vibration isolating plate is vibrated There is disclosed a technology for preventing noise.

However, Japanese Patent Application Laid-Open No. H10-304625 describes
In the method described in Japanese Patent Application Laid-Open Publication No. H11-107, the vibration of the brush is attenuated through a vibration isolating plate and a vibration absorbing material built in the brush itself at the manufacturing stage, so that a special structure is used instead of a standard structure. Is necessary, and not only is the brush expensive, but there is also a concern that it is not easily available in the case of an urgent need, and it is considered that prompt response is difficult. There are problems such as that it is considered that vibration and noise generated when the brush holder is vibrated by the vibrating force applied to the brush cannot be suppressed.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and the vibration of the brush holder caused by the abnormal vibration of the brush caused by the sliding of the brush with the commutator and the operation caused by the vibration. An object of the present invention is to provide a brush holding device capable of effectively suppressing noise in the inside and a rotating electric machine including the same.

[0008]

According to the present invention, there is provided a brush holding device for holding and holding a brush that is in sliding contact with a commutator, and a brush holder mounting body on which the brush holding device is disposed and fixed. A brush holding device comprising:
The brush retainer is configured by combining an enclosing frame composed of a central plate and a side plate with a U-shaped cross section so that an opening is formed on the commutator side, and combining with a fixing plate fastened to the substrate of the brush retainer mounting body. The fixing plate is connected to the surrounding frame via a first rigidity enhancing portion for enhancing the rigidity of the surrounding frame.

[0009] The first rigidity-enhancing portion may include a trapezoidal concave portion provided at an end of the center plate of the surrounding frame opposite to the side where the brush is inserted, and a member provided upright at an end of the fixed plate. And a pressing projection pressed against the inclined surface of the trapezoidal concave portion when the brush holder is formed by combining the surrounding frame and the fixing plate provided in the above. In addition, the first rigidity reinforcing portion is provided upright on a rectangular concave portion or a fitting protrusion provided at an end of the center plate of the surrounding frame opposite to the side where the brush is inserted, and at an end of the fixing plate. When the brush holder is formed by combining the surrounding frame and the fixing plate provided on the member, a combination of the fitting recess or the rectangular recess which is press-fitted and fitted into the rectangular recess or the fitting projection when the brush retainer is configured. is there. Also, the first
The rigidity enhancement portion is provided on a member provided upright at the end of the fixing plate. The elastic holding portion elastically holds the surrounding frame when the brush holder is configured by combining the surrounding frame and the fixing plate. Part. Further, the first rigidity enhancement portion is provided on a member provided upright at an end of the fixed plate, and when the brush holder is configured by combining the frame and the fixed plate, the frame is fixed to the fixed plate. It is an elastic pressing portion that elastically presses toward.

A brush holding device according to the present invention includes a brush holding device for storing and holding a brush that is in sliding contact with a commutator, and a brush holding device for mounting and fixing the brush holding device. In the brush retainer, a fixing plate fastened to a substrate of the brush retainer mounting body by arranging an enclosing frame having a U-shaped cross section including a central plate and a side plate so that an opening is formed on the commutator side. And the brush retainer mounting body is connected to the enclosure via a second rigidity enhancing portion for enhancing the rigidity of the enclosure.

The brush retainer mounting body has an annular plate connected to the substrate, and a second rigidity enhancing portion is provided at an end of the side plate of the surrounding frame opposite to the side where the brush is inserted. And a fitting groove formed in the annular plate of the brush retainer mounting body into which the fitting protrusion is press-fitted and fitted. The brush retainer mounting body has an annular plate connected to the substrate, and the second rigidity enhancing portion is provided at an end of the center plate of the surrounding frame opposite to the side where the brush is inserted. This is a combination of a fitting projection and a fitting groove formed in an annular plate of the brush retainer mounting body into which the fitting projection is press-fitted and fitted. An enclosing frame fixing plate provided along an end surface of the enclosing frame side plate at an end of the enclosing frame opposite to the side where the brush is inserted, and the enclosing frame; The fixing plate is configured by combining with a fixing plate insertion hole provided in a brush retainer mounting body for press-fitting / fitting or inserting / caulking the distal end portion of the fixing plate. Further, a damping material is applied to an outer wall of an enclosure forming the brush retainer.

A rotary electric machine according to the present invention is a rotary electric machine including a brush holding device having a brush holder in which a brush slidingly contacting a commutator is housed and held, the brush having any one of the above means. It is provided with a holding device. Here, the first rigidity enhancing portion has a function of enhancing the rigidity of the enclosing frame of the brush retainer, and is a generic name of technical means that connects the fixing plate and the enclosing frame, and the second rigidity enhancing portion is It is a generic name of technical means that has the function of enhancing the rigidity of the enclosure and is connected between the enclosure and the brush retainer mounting body, and is not limited to the technical means shown in the embodiments. Rather, it includes similar technical means that perform similar functions.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 Hereinafter, a brush holding device according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a configuration diagram of a brush holding device according to a first embodiment of the present invention. FIG. 1A is a perspective view illustrating a configuration of a brush holding device, and FIG. FIG. 2 is a sectional view of a main part, and FIG. 2 is an enlarged view of a fixing portion of an enclosing frame of the brush retainer viewed in the direction of arrow A in FIG. In the drawings, the same reference numerals indicate the same or equivalent components as those in the conventional example. same as below.

As shown in FIG. 1A, the brush holder 2
3 is a combination of the surrounding frame 24 and the cover plate 25 along the alternate long and short dash line.
The trapezoidal recess 2 is formed at the top of the central plate 24b on the side opposite to
Except for the provision of 4a, it has the same configuration as the surrounding frame 14. The cover plate 25 is composed of the fixed plate 15a and the fixed plate 1.
The pressing projection 2 which is continuously provided at an angle of, for example, 87 degrees with respect to the surface of the trapezoidal concave portion 24a and which is pressed against the inclined surface of the trapezoidal concave portion 24a.
5b and a spring support plate 25a provided continuously. The brush holder 23 configured as described above is
As shown in FIG. 1 (b), the tip of the caulking projection 14a is inserted into the caulking hole 11c of the substrate 11b of the brush holder mounting body 11 and firmly caulked and attached.
3 and the brush holder mounting body 11 are integrated to form a brush holding device 28 in which the circumferential rigidity of the surrounding frame 24 is enhanced. Here, a first rigidity reinforcing portion is constituted by the pressing projection 25b of the cover plate 25 and the trapezoidal concave portion 24a of the surrounding frame 24.

The brush holder 23 constructed as described above
Then, as shown in FIG. 2, the pressing protrusion 25b of the cover plate 25
Since but presses the inclined surface of the trapezoidal recess 24a of the dam 24, the by the pressing force P in the inclined surfaces will be joining the horizontal component force P _h indicated by the arrow, the substrate 11b of the brush holder mounting member 11 The rigidity in the circumferential direction of the surrounding frame 24 of the brush holder 23 attached to the brush holder 23 is enhanced. For this reason, even if an abnormal circumferential exciting force acts on the brush 17 during the operation of the electric motor, the circumferential displacement of the brush holder 23 is suppressed to be small, and the occurrence of abnormal vibration and noise can be prevented.

Embodiment 2 FIG. 3 is a perspective view showing the configuration of a brush holder according to Embodiment 2 of the present invention. In the second embodiment, one of the components constituting the brush holder 33 is the same enclosing frame 24 as that in the first embodiment, and the other cover plate 35 is fixed to the fixed plate 15a and the surface of the fixed plate 15a. For example, the spring support plate 35a is provided with a pressing projection 35b having an inclined surface at an end thereof and provided continuously at an angle of 87 degrees. By providing the inclined surface on the pressing protrusion 35b at the tip of the spring support plate 35a, there is an advantage that the pressing protrusion 35b can be easily inserted into the trapezoidal concave portion 24a of the surrounding frame 24 when the brush holder 33 is formed. The configuration method and advantages of the brush holding device using the brush holder 33 are the same as those in the first embodiment. Here, a first rigidity reinforcing portion is constituted by the pressing protrusion 35b of the cover plate 35 and the trapezoidal concave portion 24a of the surrounding frame 24.

Embodiment 3 FIG. 4 is a configuration diagram of a brush holder according to Embodiment 3 of the present invention.
FIG. 4A is a perspective view showing the configuration of a brush holder, and FIG.
(B) is an enlarged view of the fixing part of the surrounding frame of a brush holder.
In the third embodiment, one enclosing frame 34 constituting the brush holder 43 is formed with a rectangular concave portion 34a instead of the trapezoidal concave portion 24a of FIG. 1, and the other cover plate 45 has A different point from the first embodiment is that a fitting projection 45b having a tapered tip is provided instead of the pressing projection 25b in FIG. The manner in which the brush holder 43 is constructed by combining the surrounding frame 34 and the cover plate 45 is shown in FIG.
(A) is similar to the first and second embodiments in that they are combined with each other along the alternate long and short dash line. However, in the third embodiment, as shown in FIG.
Is press-fitted into the rectangular recess 34a. The method of configuring the brush holding device using the brush holder 43 is the same as in the first and second embodiments. Here, the fitting projection 45b of the cover plate 45 and the rectangular recess 34a of the
Is formed. By configuring the brush holder 43 as described above, the connection between the surrounding frame 34 and the cover plate 45 is strengthened, and the circumferential rigidity when the brush holder 43 is mounted on the brush holder mounting body 11 is enhanced. Is done. For this reason, even if an abnormal circumferential exciting force acts on the brush 17 during the operation of the electric motor, the circumferential displacement of the brush holder 43 can be suppressed to be small, and occurrence of abnormal vibration and noise can be prevented.

Embodiment 4 FIG. 5 is a configuration diagram of a brush holder according to a fourth embodiment of the present invention.
FIG. 5A is a perspective view showing the configuration of a brush holder, and FIG.
(B) is an enlarged view of the fixing part of the surrounding frame of a brush holder.
In the fourth embodiment, one enclosing frame 44 constituting the brush holder 53 is provided with a fitting projection 44a instead of the rectangular recess 34a of FIG. 4, and the other cover plate 55
The third embodiment differs from the third embodiment in that a fitting recess 55b having an inclined surface at the tip is provided instead of the fitting projection 45b. The manner in which the brush holder 53 is configured by combining the surrounding frame 44 and the cover plate 55 is the same as that of the third embodiment in that the brush holder 53 is combined with each other along the alternate long and short dash line in FIG. In Embodiment 4, FIG.
As shown in (b), since the fitting projections 44a are press-fitted into the fitting recesses 55b and fitted, the connection between the surrounding frame 44 and the cover plate 55 becomes strong, and the same effect as in the case of the third embodiment. Is obtained. Here, the first rigidity reinforcement portion is constituted by the rectangular concave portion 55b of the cover plate 55 and the fitting protrusion 44a of the surrounding frame 44.

Embodiment 5 FIG. 6 is a configuration diagram of a brush holding device according to a fifth embodiment of the present invention.
FIG. 6A is a perspective view showing the configuration of a brush holder, and FIG.
FIG. 7B is a sectional view of a main part of the brush holding device, and FIG.
It is the fixed part enlarged view of the surrounding frame of the brush holder seen in the arrow A direction of (b). In the fifth embodiment, a rectangular fitting projection 5 is provided on the top of the side plate 54b of one of the surrounding frames 54 constituting the brush holder 63 instead of the fitting projection 44a of FIG.
The above-described fourth embodiment is characterized in that two 4a are provided, and a narrow support plate 65b is continuously provided at the tip of the spring support plate 65a of the other cover plate 65 instead of the fitting concave portion of FIG. Different from the ones.

The manner in which the brush holder 63 is constructed by combining the surrounding frame 54 and the cover plate 65 is shown in FIG.
(A) is similar to that of the above-described fourth embodiment in that they are combined with each other along the alternate long and short dash line. However, in the fifth embodiment, as shown in FIG. The plate 65a and the narrow support plate 65b do not restrict the surrounding frame 54, but only support the spring 16 (not shown). When configuring the brush holding device 68 using the brush holder 63, as shown in FIGS. 6B and 7, the annular body 11 of the brush holder mounting body 11 is used.
The fitting protrusions 54a are press-fitted into fitting grooves 11d provided in advance in the hole 11a, and the caulking protrusions 14a of the surrounding frame 54 inserted into the caulking holes 11c of the substrate 11b are caulked. The brush holding device 68 in which the brush holder mounting body 11 is firmly fixed is completed. Here, a fitting groove 11d provided in the annular body 11a of the brush retainer mounting body 11 is provided.
And the fitting protrusion 54a of the surrounding frame 54 constitute a second rigidity enhancing portion. In the fifth embodiment, the brush holding device 68 is configured as described above.
Is significantly strengthened, and the rigidity not only in the circumferential direction but also in the rotation axis direction is particularly enhanced, so that the displacement of the brush holder 63 due to the abnormal excitation force based on the axial swing of the brush 17 can be suppressed to a small value. Vibration and noise can be prevented.

Embodiment 6 FIG. 8 is a configuration diagram of a brush holding device according to a sixth embodiment of the present invention.
FIG. 8A is a perspective view showing the configuration of a brush holder, and FIG.
FIG. 9B is a sectional view of a main part of the brush holding device, and FIG.
It is the fixed part enlarged view of the surrounding frame of the brush holder seen in the arrow A direction of (b). In the sixth embodiment, a rectangular fitting protrusion 64a is provided instead of the fitting protrusion 54a in FIG. The cover plate 15 is different from that of the fifth embodiment in that it is a conventional one.

The brush holding device 73 is used by using a brush holder 73 in which the surrounding frame 64 and the cover plate 15 are combined.
8, as shown in FIGS. 8 (b) and 9, the fitting protrusion 64 a is press-fitted into the fitting groove 11 e provided in the annular body 11 a of the brush retainer mounting body 11 and fitted. Then, the caulking protrusion 14a of the surrounding frame 64 inserted into the caulking hole 11c of the substrate 11b is caulked, so that the brush holder 73 and the brush holder mounting body 11 are firmly fixed, and the rigidity of the surrounding frame 64 is enhanced. The brush holding device 78 is completed. Here, the fitting groove 11e provided in the annular body 11a of the brush retainer mounting body 11 and the fitting projection 64a of the surrounding frame 64 form the second.
Is formed. In the sixth embodiment, since the brush holding device 78 is configured as described above,
The fixing of the brush retainer 63 is remarkably firm, and the rigidity in the circumferential direction as well as in the rotational axis direction is enhanced, so that the displacement of the brush retainer 73 with respect to the abnormal excitation force based on the circumferential swing of the brush 17 is reduced. It is possible to suppress the occurrence of abnormal vibration and noise.

Embodiment 7 FIG. 10 is a configuration diagram of a brush holding device according to a seventh embodiment of the present invention. FIG. 10A is a perspective view showing a configuration of a brush holding device, and FIG. FIG. 11 is a sectional view of a main part.
It is a front view which shows the attachment state of the brush holder seen in the arrow A direction of FIG.10 (b). In the seventh embodiment,
One of the enclosing frames 14 constituting the brush holder 83 has a conventional structure, and the other cover plate 75 has a fixed plate 15a and a tip of a spring support plate 75a continuously provided at right angles to the surface of the fixed plate 15a. Side plate 1 of enclosure 14 with spring force
An elastic holding portion 75b for holding 4f is provided continuously.

When the brush holder 83 is formed by combining the surrounding frame 14 and the cover plate 75, the brush holder 83 is combined with each other along the dashed line in FIG. As shown in FIGS. 10B and 11, the surrounding frame 14 is formed by the spring force of the elastic holding portion 75 b of the cover plate 75.
Of the side plate 14f. Then, similarly to the conventional example, the brush holder 83 is swaged and attached to the brush holder mounting body 11 by the swaging protrusions 14a of the shroud frame 14.
Thus, the brush holding device 88 having the enhanced rigidity in the circumferential direction is completed. Here, the cover plate 75 and the elastic holding portion 75b constitute a first rigidity reinforcing portion. In the seventh embodiment,
Since the brush holding device 88 is configured as described above, it is possible to firmly fix the surrounding frame 14 of the brush holder 83 in the circumferential direction and to make contact with the cover plate 75 fixed to the brush holder mounting body 11 having a large heat capacity. By increasing the area, the displacement of the brush holder 83 with respect to the abnormal excitation force due to the vibration of the brush 17 can be suppressed small, and the occurrence of abnormal vibration and noise can be reduced, and the heat generated during the operation of the brush holder 83 can be reduced. There is an advantage that heat can be dissipated.

Embodiment 8 FIG. FIG. 12 is a configuration diagram of a brush holding device according to an eighth embodiment of the present invention. FIG. 12A is a perspective view illustrating a configuration of a brush holding device, and FIG. FIG. 13 is a sectional view of a main part.
It is a front view which shows the attachment state of the brush holder seen in the arrow A direction of FIG.12 (b). In the eighth embodiment,
One of the surrounding frames 14 constituting the brush holder 93 has a conventional structure, and the other covering plate 85 is a fixed plate 15a and a tip of a spring supporting plate 85a connected to the surface of the fixed plate 15a at a right angle. The substrate 1 of the surrounding frame 14 by the spring force
An elastic pressing portion 85b for pressing the base plate 4e toward the opposed fixed plate 15a is provided continuously.

When the brush holder 93 is constructed by combining the surrounding frame 14 and the cover plate 85, as in the conventional example, the brush holder 93 is combined with each other along the alternate long and short dash line in FIG. As shown in FIG. 12 (b) and FIG. 13, the central plate 14e of the surrounding frame 14 is pressed by the spring force of the elastic pressing portion 85b of the cover plate 85. Then, the brush holder 93 is swaged and attached to the brush holder mounting body 11 by swaging protrusions 14a of the enclosing frame 14 in the same manner as in the conventional example.
4. The brush holding device 98 having enhanced rigidity in the rotation axis direction
Is completed. Here, the cover plate 85 and the elastic pressing portion 85b constitute a first rigidity reinforcing portion. In the eighth embodiment, since the brush holding device 98 is configured as described above, the fixing of the brush holder 93 in the rotation axis direction can be hardened, and the cover fixed to the brush holder mounting body 11 having a large heat capacity. By increasing the contact area with the plate 85, the displacement of the brush holder 93 due to the abnormal excitation force due to the vibration of the brush 17 can be suppressed to a small extent, and the occurrence of abnormal vibration and noise can be reduced. There is an advantage that heat generated at the time can be dissipated.

Embodiment 9 FIG. 14 is a configuration diagram of a brush holding device according to a ninth embodiment of the present invention. FIG. 14A is a perspective view showing a configuration of a brush holding device, and FIG. It is principal part sectional drawing. In the ninth embodiment, one of the surrounding frames 94 constituting the brush holder 103 is a surrounding frame fixing plate provided continuously to the top of the central plate 94b and provided over a predetermined length along the top of the side plate 14f. 94a, and the other cover plate 105
Has only a caulking projection insertion port 15c and a stopper projection insertion port 15d.

Then, the brush holder 103 and the brush holding device 1 are combined by combining the surrounding frame 94 and the cover plate 105.
08, as shown in FIG. 14 (a), as shown in FIG.
As shown in the figure, the end of the surrounding frame fixing plate 94a of the surrounding frame 94 is press-fitted into a fixing plate insertion opening 11f opened in the substrate 11b of the brush holder mounting body 11, and the surrounding frame inserted into the caulking hole 11c. The brush holding device 1 in which the brush holder 103 and the brush holder mounting body 11 are firmly integrated and the rigidity of the surrounding frame 94 is strengthened by caulking the caulking projection 14a of the 14a.
08 is completed. Here, the fixing plate insertion opening 11f provided on the substrate 11b of the brush holder mounting body 11 and the surrounding frame 94
And the surrounding frame fixing plate 94a constitute a second rigidity reinforcing portion. In the ninth embodiment, the brush holding device 108
Is configured as described above, the brush holder 103 can be firmly fixed.

Embodiment 10 FIG. 15 is a sectional view of a main part of a brush holding device according to a tenth embodiment of the present invention. The surrounding frame 104 according to the tenth embodiment is a longer surrounding frame fixing plate 104a than that of the ninth embodiment.
Only in that it has And this enclosure 10
4 and the cover plate 105 in combination with the brush holding device 118.
In the case of (1), the tip of the surrounding frame fixing plate 104a is freely inserted into a fixing plate insertion opening 11f opened in the substrate 11b of the brush holder mounting body 11, and then the tip is caulked and fixed to the side plate 11b. That is, in the present embodiment, the surrounding frame fixing plate 104a is not restrained in the fixing plate insertion opening 11f. Here, the substrate 11b of the brush holder mounting body 11
The second rigidity reinforcing portion is constituted by the fixing plate insertion opening 11f provided in the frame and the surrounding frame fixing plate 104a of the surrounding frame 104.
With the above configuration, a brush holding device 108 that can easily assemble the brush holder 104 and has the same effect as that of the ninth embodiment can be obtained.

Embodiment 11 FIG. FIG. 16 is a cross-sectional view of a main part of a brush holding device according to an eleventh embodiment of the present invention, and FIG. 17 is a cross-sectional view as viewed in the XVII-XVII direction of FIG. In the figure, reference numeral 19 denotes a known coating type vibration damping material having an effect of attenuating the vibration of the structural member, which is coated on the outer surface of the surrounding frame 14 of the brush retainer. Embodiment 1
1 are the same as those in the conventional example, and the brush holding device 128 is configured by using the surrounding frame 14 having the damping material 19 applied to the outer surface. With this configuration, even if an abnormal exciting force acts on the brush, the vibration of the brush holder is effectively attenuated, and the occurrence of abnormal vibration and noise can be reduced. The method of applying the damping material 19 to attenuate the vibration of the brush holder is not limited to the eleventh embodiment, but can be applied to any of the above embodiments. A similar effect can be obtained by attaching a known damping sheet in place of the coating type damping goods.

In the first to eleventh embodiments, the object to which the brush holding device is applied has been described as a DC motor. However, the present invention is not limited to this and can be applied to a DC generator or an AC rectifier. It can also be applied to a child electric motor or the like.

[0032]

The present invention is configured as described above.
It has the following effects. In the brush holding device according to the present invention, the brush holder is arranged such that an enclosing frame having a U-shaped cross section including a center plate and a side plate is formed with an opening on the commutator side, and fastened to a substrate of the brush holder mounting body. The fixed plate is combined with the surrounding frame via the first rigidity reinforcing portion that strengthens the rigidity of the surrounding frame, so that an abnormal excitation force is applied to the brush during operation of the rotating electric machine. Even if it acts, the displacement of the brush retainer is effectively suppressed, and the occurrence of abnormal vibration and noise can be prevented.

In the brush holding device according to the present invention, the brush holder is disposed such that an enclosing frame composed of a center plate and a side plate has a U-shaped cross section so that an opening is formed on the commutator side. And the brush retainer mounting body is connected to the surrounding frame via the second rigidity reinforcing portion for enhancing the rigidity of the surrounding frame, so that the abnormal state occurs during the operation of the rotating electric machine. Even if the excitation force acts on the brush, the displacement of the brush holder is effectively suppressed, and the occurrence of abnormal vibration and noise can be prevented. In addition, since the damping material is applied to the outer wall of the surrounding frame constituting the brush retainer, even if an abnormal excitation force acts on the brush during operation of the rotating electric machine, the displacement of the brush retainer is effectively suppressed. And the occurrence of abnormal vibration and noise can be prevented.

Since the rotating electric machine according to the present invention includes the brush holding device having the configuration of the above invention, even if an abnormal vibration force acts on the brush during operation, the displacement of the brush holder can be effectively performed. Suppressed and low-noise rotating electric machine is obtained.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a brush holding device according to a first embodiment of the present invention.

FIG. 2 is an enlarged view of a fixing portion of an enclosing frame of the brush retainer as viewed in the direction of arrow A in FIG. 1 (b).

FIG. 3 is a perspective view illustrating a configuration of a brush holder according to a second embodiment of the present invention.

FIG. 4 is a configuration diagram of a brush holder according to a third embodiment of the present invention.

FIG. 5 is a configuration diagram of a brush holder according to a fourth embodiment of the present invention.

FIG. 6 is a configuration diagram of a brush holding device according to a fifth embodiment of the present invention.

FIG. 7 is an enlarged view of a fixing portion of an enclosing frame of the brush holder as viewed in the direction of arrow A in FIG. 6 (b).

FIG. 8 is a configuration diagram of a brush holding device according to a sixth embodiment of the present invention.

FIG. 9 is an enlarged view of a fixing portion of an enclosing frame of the brush holder as viewed in the direction of arrow A in FIG. 8B.

FIG. 10 is a configuration diagram of a brush holding device according to a seventh embodiment of the present invention.

FIG. 11 is a front view showing the state of attachment of the brush retainer viewed in the direction of arrow A in FIG. 10 (b).

FIG. 12 is a configuration diagram of a brush holding device according to an eighth embodiment of the present invention.

FIG. 13 is a front view showing the state of attachment of the brush retainer viewed in the direction of arrow A in FIG. 12 (b).

FIG. 14 is a configuration diagram of a brush holding device according to a ninth embodiment of the present invention.

FIG. 15 is a sectional view of a main part of a brush holding device according to a tenth embodiment of the present invention.

FIG. 16 is a sectional view of a main part of a brush holding device according to an eleventh embodiment of the present invention.

FIG. 17 is a cross-sectional view taken along the XVII-XVII direction in FIG.

FIG. 18 is a cross-sectional view showing a configuration of a conventional DC motor.

19 is a cross-sectional view as viewed in the XIX-XIX direction of FIG.

FIG. 20 is a configuration diagram of a conventional brush holding device.

FIG. 21 is an explanatory diagram of generated vibration in a conventional brush holding device.

[Explanation of symbols]

6; commutator 11; brush retainer mounting body 11a; annular plate 11b; substrate 11c; caulking holes 11d, 11e; fitting groove 11f;
Fixing plate insertion opening 14a; caulking projection 14b; stopper projection 14c;
Positioning protrusions 14f, 54b; Side plate 15a; Fixing plate 15c; Caulking protrusion insertion opening 15d; Positioning protrusion insertion opening 19; Damping material 23, 33, 43, 53, 63, 73, 83, 93, 1
03; brush retainers 24, 34, 44, 54, 64, 94; enclosure 24a; trapezoidal recesses 24b, 34b, 44b, 64b,
94b; central plate 25; cover plate 25b, 35b; pressing projections 28, 68, 78, 88, 98, 108, 118, 12
8; brush holding devices 34a, 55b; rectangular concave portions 44a, 45b, 54a,
64a; fitting projection 75b; elastic holding portion 85b; elastic pressing portion 94a;

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masaru Kubota 6-10-8 Tsukaguchi Honcho, Amagasaki City, Hyogo Prefecture Inside Osaka Electric Engineering Co., Ltd. (72) Inventor Kenji Shiraishi 2-6-1 Otemachi, Chiyoda-ku, Tokyo No.2 Mitsubishi Electric Engineering Co., Ltd. F-term (reference) 5H613 AA01 AA02 AA03 BB04 BB15 BB27 GA13 GB09 KK04 KK05 KK12 PP03 5H623 AA04 BB07 GG11 HH05 LL02 LL03 LL04 LL07 LL14 LL16

Claims (11)

[Claims] 1. A brush holding apparatus comprising: a brush holder for accommodating and holding a brush that is in sliding contact with a commutator; and a brush holder mounting body for disposing and fixing the brush holder. The container is configured by arranging an enclosing frame composed of a central plate and a side plate so as to form an opening on the commutator side and combining with a fixing plate fastened to the substrate of the brush retainer mounting body. The brush holding device is characterized in that the fixing plate is connected to the surrounding frame via a first rigidity enhancing portion that strengthens the rigidity of the surrounding frame. 2. The first rigidity-enhancing portion includes a trapezoidal recess provided at an end of the center plate of the surrounding frame opposite to a side where the brush is inserted, and a member provided upright at an end of the fixed plate. And a pressing projection that is pressed against the inclined surface of the trapezoidal concave portion when the brush holder is formed by combining the surrounding frame and the fixing plate provided in the frame. The brush holding device according to claim 1, wherein 3. The first rigidity enhancing portion includes a rectangular concave portion or a fitting projection provided at an end of the central plate of the enclosing plate opposite to the side where the brush is inserted, and an upright end at the end of the fixing plate. When the brush holder is configured by combining the surrounding frame and the fixing plate provided on the provided member, the fitting protrusion or the rectangular recess which is press-fitted and fitted into the rectangular recess or the fitting protrusion when the brush retainer is formed. 2. The combination according to claim 1, wherein the combination is configured.
The brush holding device as described in the above. 4. A first rigidity enhancing portion is provided on a member erected at an end of a fixed plate, and said enclosure is formed when a brush holder is formed by combining said enclosure plate and said fixed plate. The brush holding device according to claim 1, wherein the brush holding device is an elastic holding portion that elastically holds the plate. 5. The first rigidity enhancing portion is provided on a member erected at an end of a fixed plate, and the enclosure is formed when the enclosure plate and the fixed plate are combined to form a brush holder. 2. The brush holding device according to claim 1, wherein the brush holding device is an elastic pressing portion that elastically presses the plate toward the fixed plate. 6. A brush holding device comprising: a brush holder for accommodating and holding a brush that is in sliding contact with a commutator; and a brush holder mounting body for disposing and fixing the brush holder. The container is configured by arranging an enclosing frame composed of a central plate and a side plate so as to form an opening on the commutator side and combining with a fixing plate fastened to the substrate of the brush retainer mounting body. The brush holding device is characterized in that the brush retainer mounting body is connected to the enclosing frame via a second rigidity enhancing portion for enhancing the rigidity of the enclosing frame. 7. The brush retainer mounting body has an annular plate connected to the substrate, and the second rigidity reinforcing portion is provided at an end of the side plate of the surrounding frame opposite to the side where the brush is inserted. And a fitting groove provided on an annular plate of the brush retainer mounting body into which the fitting protrusion is press-fitted and fitted. Item 7. The brush holding device according to Item 6. 8. The brush retainer mounting body has an annular plate connected to the substrate, and the second rigidity reinforcing portion is provided at an end of the center plate of the surrounding frame opposite to the side where the brush is inserted. The present invention is characterized in that the fitting protrusion is provided in combination with a fitting groove provided in an annular plate of the brush retainer mounting body into which the fitting protrusion is press-fitted and fitted. The brush holding device according to claim 6. 9. A frame fixing plate provided at the end of the center plate of the frame opposite to the side where the brush is inserted, along the end surface of the side plate of the frame. 7. The fixing device according to claim 6, wherein a fixing plate insertion hole provided in a brush retainer mounting body for press-fitting / fitting or inserting / caulking a tip portion of the surrounding frame fixing plate is provided.
The brush holding device as described in the above. 10. A vibration damping material is applied to an outer wall of an enclosure forming a brush retainer.
The brush holding device according to claim 9. 11. A rotary electric machine having a brush holding device having a brush holder in which a brush that is in sliding contact with a commutator is stored and held, wherein the brush holding device according to any one of claims 1 to 10 is provided. A rotating electric machine comprising: