JP6105800B1 - Motor assembly - Google Patents

Abstract

Provided is a motor assembly in which a motor main body can be housed in a predetermined position of a motor case, and a necessary ventilation space and wiring space can be secured. A motor assembly includes an electric motor, a first case and a second case that house the electric motor, and a first elastic member that is interposed between the electric motor and the first case. And a second elastic member 22 interposed between the electric motor 1 and the second case 12. At this time, the arc-shaped through hole 414 and the first arc-shaped through hole 114 are arranged by the first convex portion 213 so as to coincide with each other. Further, the end cover vent hole 53 and the vent cutout portion 125 are arranged by the second convex portion 223 so that they coincide with each other. Further, the connector part 52 and the connector opening 124 are arranged by the second convex part 223 so that they coincide with each other. [Selection] Figure 2

Description

  The present invention includes a cylindrical frame having a main shaft penetrating from one end and having permanent magnets opposed to each other on an inner surface, an end cover covering the other end of the frame, and at least a pair of the end covers. The present invention relates to an electric motor having a holder to which a brush is attached.

  Conventionally, as a motor assembly of this type, as shown in Patent Document 1 below, in a structure in which a vibration isolating material is interposed between a motor housing and a motor housing, a plurality of protrusions are provided on the motor case. A configuration is known in which a motor is housed in a predetermined position of a motor case by providing a depression at a position of a vibration isolating material corresponding to the protrusion.

JP 2005-341733 A

  Here, in the motor assembly shown in Patent Document 1, although the motor main body can be stored in a predetermined position of the motor case, the motor main body is completely covered in the motor case, and the necessary ventilation space, wiring, etc. There was a problem that space could not be secured.

  In view of the above circumstances, the present invention provides a motor assembly in which a motor main body can be stored in a predetermined position of a motor case and a necessary ventilation space, wiring, and the like can be secured. Objective.

A motor assembly according to a first aspect of the present invention is a cylindrical frame in which a main shaft passes from one end and permanent magnets are provided opposite to each other on an inner surface, an end cover that covers the other end of the frame, and an end cover An electric motor having a holder to which at least a pair of brushes are attached;
In a motor assembly comprising: a motor case having a first case in which the frame side of the electric motor is accommodated; and a second case in which the end cover side of the electric motor is accommodated.
A first elastic member attached to one end of the frame;
A second elastic member attached to the other end of the end cover;
The first elastic member is circumferentially positioned and attached to one end of the frame by a first positioning portion formed in a part of the circumferential direction, and is positioned and attached to the first case in the circumferential direction. The frame and the first case are connected by the first elastic member with a gap,
The second elastic member is positioned and attached to the other end of the end cover in a circumferential direction by a second positioning portion formed in a part in the circumferential direction, and is positioned and attached to the second case in the circumferential direction. The end cover and the second case are connected by the second elastic member with a gap.

  According to the electric motor assembly of the first invention, the first elastic member is positioned and attached to one end of the frame in the circumferential direction and is positioned and attached to the first case in the circumferential direction. Accordingly, the positional relationship between the frame and the first case is reliably positioned by the first elastic member, and a gap is formed between the frame and the first case.

  Further, the second elastic member is positioned and attached to the other end of the end cover in the circumferential direction, and is positioned and attached to the second case in the circumferential direction. Accordingly, the positional relationship between the end cover and the second case is reliably positioned by the second elastic member, and a gap is formed between the end cover and the second case.

  Thus, according to the motor assembly of the first aspect of the invention, the motor body can be stored in a predetermined position of the motor case, and necessary ventilation space and wiring space can be secured.

The motor assembly of a second invention is the motor assembly according to the first invention, wherein the first positioning portion is a first convex portion projecting outward in the circumferential direction from the first elastic member, and the first convex portion corresponds to the first convex portion. A frame recess is formed at the position of the frame, and a first case recess is formed at the position of the first case corresponding to the first protrusion,
The second positioning portion is a second convex portion protruding outward in the circumferential direction from the second elastic member, and an end cover concave portion is formed at a position of the end cover corresponding to the second convex portion. A second case recess is formed at a position of the second case corresponding to the second protrusion.

  According to the motor assembly of the second invention, when the positional relationship between the frame and the first case is positioned by the first elastic member, the mounting position of the frame and the first case relative to the first elastic member may be clear. As required for the assembly work, the first positioning portion is a first convex portion protruding outward in the circumferential direction from the first elastic member, and a frame concave portion is formed at a position of the frame corresponding to the first convex portion, and the first By forming the first case concave portion at the position of the first case corresponding to the convex portion, the attachment position of the frame and the first case relative to the first elastic member can be clarified.

  Similarly, when the positional relationship between the end cover and the second case is positioned by the second elastic member, it is required in assembly work that the attachment positions of the end cover and the second case with respect to the second elastic member are clear. However, the second positioning portion is a second convex portion projecting outward in the circumferential direction from the second elastic member, an end cover concave portion is formed at the position of the end cover corresponding to the second convex portion, and the second convex portion is By forming the second case recess at the corresponding second case position, the attachment positions of the end cover and the second case relative to the second elastic member can be clarified.

  Thus, according to the motor assembly of the second invention, the motor body can be easily and reliably stored in a predetermined position of the motor case in assembling work.

A motor assembly according to a third aspect of the present invention is the second aspect of the invention,
The first elastic member and the second elastic member have the same shape.

  According to the motor assembly of the third invention, the first elastic member and the second elastic member have the same shape, so that the motor can be assembled while performing the assembly work without distinguishing between the first elastic member and the second elastic member. The main body can be easily and reliably stored in a predetermined position of the motor case.

A motor assembly of a fourth invention is any one of the first to third inventions,
The frame has a frame vent formed on one end side,
The first case has a first case vent formed at a position corresponding to the frame vent,
The end cover has a connector part electrically connected to the brush on a part of the side part, and an end cover vent hole cut out on the other end side of the end cover,
The second case has a connector opening formed at a position corresponding to the connector portion, and a second case ventilation hole formed at a position corresponding to the end cover ventilation hole,
The frame and the first case are arranged by the first positioning portion so that the frame vent and the first case vent coincide with each other,
The end cover and the second case are arranged by the second positioning portion so that the connector portion and the connector opening coincide with each other, and the end cover vent hole and the second case vent hole coincide with each other. It is characterized by being.

  According to the motor assembly of the fourth aspect of the invention, the frame vent hole formed in the frame and the first case vent hole formed in the first case are arranged by the first positioning portion so as to coincide with each other. .

  Further, the end cover vent hole formed in the end cover and the second case vent hole formed in the second case are arranged by the second positioning portion so as to coincide with each other. Furthermore, the connector part of the motor body and the connector opening of the second case are arranged by the second positioning part so that they match.

  Thus, according to the motor assembly of the fourth aspect of the invention, the motor body can be housed in a predetermined position of the motor case, and the necessary ventilation space and wiring space can be actually secured.

BRIEF DESCRIPTION OF THE DRAWINGS Explanatory sectional drawing which shows the whole structure of the motor assembly of this embodiment. FIG. 2 is an exploded view of the motor assembly of FIG. 1. The partial exploded view which looked at the motor assembly of Drawing 2 from other angles.

  With reference to FIGS. 1-3, the structure of the motor assembly of this embodiment is demonstrated.

  As shown in FIG. 1, the motor assembly of this embodiment includes an electric motor 1, a first case 11 and a second case 12 that house the electric motor 1, and an electric motor 1 and a first case 11. The first elastic member 21 and the second elastic member 22 interposed between the electric motor 1 and the second case 12 are provided.

  As shown in FIGS. 2 and 3, the electric motor 1 includes a cylindrical frame 4 in which the main shaft 2 penetrates from one end and a permanent magnet 3 provided opposite to the inner surface, and the other end of the frame 4. An end cover 5 and a holder 6 provided on the end cover to which at least a pair of brushes 60 are attached.

  The frame 4 is a bottomed cylindrical metal member, and four permanent magnets 3 are provided opposite to each other on the inner surface. That is, the motor of the present embodiment is a four-pole motor having four permanent magnets 3.

  The main shaft 2 is provided with a rotor, a stator, a coil, etc. (not shown) at a position facing the permanent magnet 3, and a commutator (commutator) (not shown) at a position facing the brush 60.

  A first support portion 411 that supports the main shaft 2 is formed on one end side (bottom surface side) of the frame 4 so as to protrude from the bottom surface, and a bearing 412 provided on the inner side surface of the first support portion 411 is interposed therebetween. Thus, one end of the main shaft 2 is supported by the frame 4.

  In the bottom surface portion of the frame 4 surrounding the first support portion 411, a first engagement receiving portion 413 (corresponding to a frame concave portion of the present invention) that is a circular through hole, and an arc-shaped through hole 414 as a vent hole ( Corresponding to the frame vent hole of the present invention), and a plurality of arcuate through holes 414 are formed radially with the first engagement receiving portion 413 interposed therebetween.

  Further, a plurality of pairs of engaging portions 41 for fixing the end cover 5 are formed so as to protrude to the other end side of the frame 4.

  The end cover 5 has a cylindrical side portion connected to the other side of the frame 4 and a bottom portion that closes the other end of the side portion.

  The side portion of the end cover 5 has a plurality of engagement receiving portions 51 provided to protrude outward in the circumferential direction at positions corresponding to the pair of engaging portions 41, 41 of the frame 4. The frame 4 and the end cover 5 are engaged and integrated with each other by sandwiching and caulking the pair of engaging portions 41, 41 with 51.

  On the other hand, a second support portion 511 that supports the main shaft 2 is formed on the bottom surface of the end cover 5 so as to protrude from the bottom surface, and the main shaft is interposed via a bearing (not shown) provided on the inner surface of the second support portion 511. The other end of 2 is supported by the end cover 5.

  A second engagement receiving portion 513 (corresponding to an end cover concave portion of the present invention) that is a circular through hole is formed on the bottom surface portion of the end cover that surrounds the second support portion 511.

  Further, a connector portion 52 to which a connector is connected is provided on the side portion of the end cover 5 so as to penetrate a part of the side surface.

  The connector portion 52 is configured to be detachable from the end cover 5, and the same electric motor 1 can be connected to a plurality of connectors by appropriately changing the connector portion 52 according to the type of connector. It is possible to cope with.

  Furthermore, an end cover vent hole 53 is formed on the side of the end cover 5 at a position facing the connector portion 52.

  The end cover vent hole 53 is a vent hole in which the other end side of the end cover 5 is cut out from the side part to the bottom part, and the penetration direction extends from the side part to the bottom part, thereby improving the ventilation efficiency. In addition, the radial strength of the side portion of the end cover 5 and the bearing strength of the bottom portion can be ensured.

  The holder 6 is a holder made of synthetic resin, and includes a hollow circular ring frame 61 and leg portions 62 extending radially from the ring frame 61 in four directions (90-degree intervals).

  The annular frame 61 is provided with a pair of brush cover portions 63 which are inclined cylindrical members and incorporate and support a pair of brushes 60.

  Here, a gap is formed between the brush cover portion 63 and the end cover 5, and this gap functions as an auxiliary ventilation hole that promotes ventilation into the motor.

  The brush 60 is biased inward in the circumferential direction by a biasing means (for example, a coil spring) (not shown), and is attached to the connector portion 52 via a pigtel wire 64 led out from a notch of the brush cover portion 63. Electrically connected.

  The leg portion 62 is composed of a long leg portion 62a and a short leg portion 62b having different leg lengths, and the long leg portion 62a is fitted into the holder groove at a circumferentially outer position of the end cover 5, and the short leg portion The part 62b is fitted into the holder groove at the inner position in the circumferential direction of the end cover 5.

  Here, anti-vibration rubbers 65a and 65b are attached to the end portions of the long leg portion 62a and the short leg portion 62b, respectively.

  In the present embodiment, the case has been described in which the leg portions 62 of the holder 6 extend radially in four directions (intervals of 90 degrees), but the present invention is not limited to this. For example, it may be configured to extend radially in three directions (at intervals of 120 degrees).

  The first elastic member 21 is a rubber member (for example, the same material as the anti-vibration rubbers 65 a and 65 b) attached to one end of the frame 4, and has a bottomed surface that is extrapolated to the first support portion 411 of the frame 4. A cylindrical first elastic member main body 211, a first through hole 212 formed in the bottom surface of the first elastic member main body 211, and a part of the outer surface of the first elastic member main body 211 protrude outward in the circumferential direction. 1st convex part 213 (equivalent to the 1st positioning part of this invention).

  The first protrusion 213 includes a first protrusion 213A that protrudes in the direction opposite to the bottom surface of the first elastic member main body 211, and a first engagement portion 213B formed at the tip of the first protrusion 213A. Here, when the first engagement portion 213B is engaged with the first engagement receiving portion 413 of the frame 4, the first elastic member 21 is positioned in the circumferential direction and the main shaft 2 direction at one end of the electric motor 1. Fixed.

  The second elastic member 22 is a rubber member (for example, the same material as the anti-vibration rubbers 65 a and 65 b) attached to the other end (bottom surface) of the end cover 5, and the second support portion 511 of the end cover 5. The second elastic member main body 221 having a bottomed cylindrical shape that is externally attached to the second elastic member main body 221, the second through hole 222 formed in the bottom surface of the second elastic member main body 221, and a part of the outer surface of the second elastic member main body 221 It has the 2nd convex part 223 (equivalent to the 2nd positioning part of this invention) protruded to the direction outward.

  The 2nd convex part 223 has the 2nd projection part 223A projected in the direction opposite to the bottom of the 2nd elastic member main part 221, and the 2nd engaging part 223B formed in the tip. Here, when the second engagement portion 223B engages with the second engagement receiving portion 513 of the end cover 5, the second elastic member 22 is positioned in the circumferential direction and the main shaft 2 direction at the other end of the electric motor 1. Fixed.

  In the present embodiment, the first elastic member 21 and the second elastic member 22 have the same shape and can be used without distinction, but the first elastic member 21 and the second elastic member 22 You may comprise so that a structure, such as a magnitude | size and a shape, may differ with the member 22. FIG.

  Finally, in the first case 11 and the second case 12, the electric motor 1 in which the end cover 5 is assembled to the frame 4 is housed in the second case from the other end side (end cover 5 side). The electric motor 1 housed in the case is housed in the first case from one end side (the frame 4 side).

  The first case 11 has a bottomed cylindrical inner case 110 that is extrapolated to the second case 12, and the bottom surface of the inner case 110 has a circular first depression corresponding to the outer shape of the first elastic member 21. 111, a first case through-hole 112 that penetrates the center of the first depression 111 corresponding to the first through-hole 212, and a part of the first depression 111 corresponding to the first convex part 213 from the circumferential direction. And a first case recess 113 protruding in the direction.

  The bottom surface of the inner case 110 has a first arc-shaped through hole 114 (corresponding to the first case ventilation hole of the present invention) so as to correspond to the arc-shaped through hole 414 around the first depression 111. A plurality of first arc-shaped through-holes 114 are formed radially with the first convex portion 213 interposed therebetween.

  A cylindrical outer case 115 is provided outside the inner case 110 so as to cover almost half of the inner case 110, and the inner case 110 and the outer case 115 are gently connected by a connecting portion 116. .

  The second case 12 has a bottomed cylindrical second case main body 120. On the bottom surface of the second case main body 120, a circular second depression 121 corresponding to the outer shape of the second elastic member 22, and a second The second case through-hole 122 penetrating the center of the second depression 121 corresponding to the two through-holes 222 and the part of the second depression 121 protruding outward in the circumferential direction corresponding to the second protrusion 223 And a second case recess 123.

  Further, the side surface of the second case main body 120 has a connector opening 124 cut out at a position corresponding to the connector portion 52, and a ventilation notch whose side surface is cut out in the axial direction so as to include a position corresponding to the end cover ventilation hole 53. A portion 125 (corresponding to the second case vent of the present invention) is formed.

  The first case 11 and the second case 12 have a plurality of engaging portions 126 provided on the outer surface of the second case main body 120 (with the electric motor 1 housed). It is united by engaging with a claw portion 117 provided on the outer surface of the case 110.

  The above is the details of the configuration of the motor assembly of the present embodiment. The motor assembly includes (1) assembly of the electric motor 1, (2) mounting of the first elastic member 21 and the second elastic member 22, and (3) first. The first case 11 and the second case 12 are assembled and then assembled.

  First, (1) in assembling the electric motor 1, the end cover 5 to which the brush holder 6, the connector portion 52, and the like are previously attached is assembled to the frame 4.

  In assembling the end cover 5 and the frame 4, the pair of engaging portions 41, 41 of the frame 4 are sandwiched and caulked by the engagement receiving portion 51 of the end cover 5, so that vibration is generally generated as compared with a two-pole motor. Even in a large four-pole motor, the end cover 5 and the frame 4 can be reliably engaged and integrated.

  Next, (2) when the first elastic member 21 is mounted, the first convex portion 213 of the first elastic member 21 is aligned with the first engagement receiving portion 413 of the frame 4 at one end of the electric motor 1 to provide the first support. The first elastic member main body 211 is extrapolated to the part 411.

  At this time, the first engagement member 213B is engaged with the first engagement receiving portion 413, whereby the first elastic member 21 is positioned and fixed in the circumferential direction and the main shaft 2 direction at one end of the electric motor 1. The

  Further, (2) when the second elastic member 22 is mounted, the second convex portion 223 of the second elastic member 22 is aligned with the second engagement receiving portion 513 of the end cover 5 at the other end of the electric motor 1, The second elastic member main body 221 is extrapolated to the support portion 511.

  At this time, the second engagement member 223B is engaged with the second engagement receiving portion 513, so that the second elastic member 22 is positioned and fixed in the circumferential direction and the main shaft 2 direction at the other end of the electric motor 1. Is done.

  Next, (3) when the first case 11 and the second case 12 are mounted, the electric motor 1 is first mounted on the second case 12 with the first elastic member 21 and the second elastic member 22 mounted on the electric motor 1. It is stored from the end cover 5 side.

  At this time, the bottom surface of the second case 12 has a shape corresponding to the outer shape of the second elastic member 22, the second convex portion 223 is aligned with the second case concave portion 123, and the second elastic member is aligned with the second depression 121. The electric motor 1 is housed in the second case 12 so that the main body 221 fits.

  Accordingly, the second case 12 is positioned in the circumferential direction and the main shaft 2 direction with respect to the electric motor 1 through the second elastic member 22 at the other end of the electric motor 1.

  Next, the second case main body 120 is inserted into the inner case 110 of the first case 11 with the electric motor 1 stored in the second case 12.

  At this time, the bottom surface of the first case 11 has a shape corresponding to the outer shape of the first elastic member 21, the first convex portion 213 is aligned with the first case concave portion 113, and the first elastic member is aligned with the first depression 111. The electric motor 1 is accommodated in the first case 11 so that the main body 211 is fitted.

  Accordingly, the first case 11 is positioned in the circumferential direction and the main shaft 2 direction with respect to the electric motor 1 through the first elastic member 21 at one end of the electric motor 1.

  The first case 11 and the second case 12 have a plurality of engaging portions 126 provided on the outer surface of the second case main body 120 and claw portions provided on the outer surface of the inner case 110 of the first case 11. By being engaged with 117, it is fixed integrally.

  In the motor assembly assembled as described above, the first elastic member 21 is attached to one end of the frame 4 while being positioned in the circumferential direction, and is positioned and attached to the first case 11 in the circumferential direction. Thereby, the positional relationship between the frame 4 and the first case 11 is reliably positioned by the first elastic member 21, and a gap is formed between the frame 4 and the first case (see FIG. 1).

  In addition, the second elastic member 22 is attached to the other end of the end cover 5 by being positioned in the circumferential direction and is attached to the second case 12 by being positioned in the circumferential direction. Thereby, the positional relationship between the end cover 5 and the second case 12 is reliably positioned by the second elastic member 22, and a gap is formed between the end cover and the second case (see FIG. 1).

  At this time, the arc-shaped through hole 414 (frame vent hole) formed in the frame 4 and the first arc-shaped through hole 114 (first case vent hole) formed in the first case are the first convex portions 213. These are arranged so as to coincide with each other by the (first positioning portion).

  Further, the end cover vent hole 53 formed in the end cover 5 and the vent cutout portion 125 (second case vent hole) formed in the second case 12 are formed by the second convex portion 223 (second positioning portion). , These are arranged to match. Furthermore, the connector part 52 and the connector opening 124 of the second case 12 are arranged by the second convex part 223 (second positioning part) so as to coincide with each other.

  At this time, the ventilation notch 125 is notched in the axial direction, and the inflow of cooling air into the case can be promoted. Further, the cooling air flowing into the case from the side surface direction of the case through the ventilation notch 125 penetrates through the end cover vent hole 53 in which the other end portion side of the end cover 5 is cut out from the side portion to the bottom portion. Ventilation efficiency can be improved because the direction extends from the side to the bottom.

  As described above, according to the motor assembly of the present embodiment, the electric motor 1 can be stored in a predetermined position of the motor cases 11 and 12 and a necessary space such as a ventilation space and wiring is actually secured. Can do.

  In the present embodiment, the first positioning portion and the second positioning portion are configured by the first convex portion 213 and the second convex portion 223, but are not limited thereto. For example, the first positioning portion may be a protrusion or the like protruding from the bottom of the first elastic member main body 211 toward the inner surface side and the outer surface side, and the second positioning portion may be mutually connected from the bottom portion of the second elastic member main body 221. The protrusion etc. which protruded to the inner surface side and the outer surface side may be sufficient.

  In the present embodiment, the electric motor is described as an example of a four-pole motor. However, the electric motor is not limited to this, and is a two-pole motor in which two permanent magnets are provided opposite to each other on the frame 4. Also good.

  Furthermore, in the present embodiment, the case has been described in which the holder 6 includes a pair of brush cover portions 63 that incorporate and support a pair of brushes. However, the present invention is not limited to this, and includes two pairs of brushes. The configuration may include two pairs of brush cover parts 63 so as to support four brushes.

DESCRIPTION OF SYMBOLS 1 ... Electric motor, 2 ... Main shaft, 3 ... Permanent magnet, 4 ... Frame, 5 ... End cover, 6 ... Holder, 11 ... 1st case, 12 ... 2nd case, 21 ... 1st elastic member, 22 ... 2nd Elastic member 113... First case recess 114. First arcuate through hole (first case vent) 123. Second case recess 124. Connector opening 125. Ventilation notch (second case vent) 213 ... 1st convex part (1st positioning part), 223 ... 2nd convex part (2nd positioning part), 413 ... 1st engagement receiving part (frame recessed part), 513 ... 2nd engagement receiving part (end) Cover recess).

Claims (4)

A cylindrical frame having a main shaft penetrating from one end and permanent magnets facing each other on an inner surface, an end cover covering the other end of the frame, and at least a pair of brushes provided on the end cover are attached. An electric motor having a holder;
In a motor assembly comprising: a motor case having a first case in which the frame side of the electric motor is accommodated; and a second case in which the end cover side of the electric motor is accommodated.
A first elastic member attached to one end of the frame;
A second elastic member attached to the other end of the end cover;
The first elastic member is circumferentially positioned and attached to one end of the frame by a first positioning portion formed in a part of the circumferential direction, and is positioned and attached to the first case in the circumferential direction. The frame and the first case are connected by the first elastic member with a gap,
The second elastic member is positioned and attached to the other end of the end cover in a circumferential direction by a second positioning portion formed in a part in the circumferential direction, and is positioned and attached to the second case in the circumferential direction. The motor assembly, wherein the end cover and the second case are connected by the second elastic member with a gap. The motor assembly of claim 1.
The first positioning portion is a first protrusion protruding outward in the circumferential direction from the first elastic member, and a frame recess is formed at a position of the frame corresponding to the first protrusion, A first case recess is formed at a position of the first case corresponding to the first protrusion;
The second positioning portion is a second convex portion protruding outward in the circumferential direction from the second elastic member, and an end cover concave portion is formed at a position of the end cover corresponding to the second convex portion. A motor assembly, wherein a second case recess is formed at a position of the second case corresponding to the second protrusion. The motor assembly according to claim 2, wherein
The motor assembly according to claim 1, wherein the first elastic member and the second elastic member have the same shape. The motor assembly according to any one of claims 1 to 3,
The frame has a frame vent formed on one end side,
The first case has a first case vent formed at a position corresponding to the frame vent,
The end cover has a connector part electrically connected to the brush on a part of the side part, and an end cover vent hole cut out on the other end side of the end cover,
The second case has a connector opening formed at a position corresponding to the connector portion, and a second case ventilation hole formed at a position corresponding to the end cover ventilation hole,
The frame and the first case are arranged by the first positioning portion so that the frame vent and the first case vent coincide with each other,
The end cover and the second case are arranged by the second positioning portion so that the connector portion and the connector opening coincide with each other, and the end cover vent hole and the second case vent hole coincide with each other. A motor assembly.