JP2019050704A - Rotary electric machine - Google Patents

Abstract

To provide a rotary electric machine capable of enhancing versatility and reducing manufacturing costs.SOLUTION: The rotary electric machine includes: a cylindrical motor case; mounting holes; and a body to be mounted. The motor case accommodates a rotor. The plurality of mounting holes is provided on an outer surface of the motor case, and a mounting seat for fixing the motor case can be mounted. The body to be mounted is mounted on the mounting seat.SELECTED DRAWING: Figure 1

Description

  Embodiments of the present invention relate to a rotating electrical machine.

In the rotary electric machine, a stator and a rotor are accommodated in a tubular motor case. The stator is fixed in the motor case in a state in which a plurality of coils are wound. On the other hand, the rotor is provided rotatably with respect to the stator.
The motor case is provided with a mounting seat for fixing the rotary electric machine at a predetermined installation place. In addition, a terminal box or an inverter may be provided on the outer surface of the motor case to supply power to the coil wound around the stator. In such a case, while the terminal part of the coil is drawn out to the terminal box, the external power supply is connected to the inverter. The terminal box and the inverter are electrically connected through lead wires and the like. Thus, when the power of the external power supply is supplied to the coil through the inverter and the terminal box, a predetermined magnetic field is generated in the stator, and the rotor rotates under the influence of the magnetic field.

By the way, when installing a rotary electric machine, in order to achieve space saving of an installation space including other machine parts etc., in many cases, it receives restrictions of a layout. For example, the installation direction of the inverter also needs to be changed according to the installation conditions of the rotating electrical machine.
However, when it is desired to integrate an option exceeding the normal range, such as an inverter separate from the rotating electric machine, there is a case where it is necessary to redesign the motor case each time. For this reason, there existed a possibility that the manufacturing cost of rotary electric machine might increase.

Japanese Patent Application Laid-Open No. 9-65596 JP 10-257708 A

  The problem to be solved by the present invention is to provide a rotating electrical machine capable of enhancing versatility and reducing manufacturing costs.

  The rotary electric machine of the embodiment has a cylindrical motor case, a mounting hole, and a mounting body. The motor case accommodates the rotor. A plurality of mounting holes are provided on the outer side surface of the motor case, and mounting seats for fixing the motor case can be mounted. The mounted body is mounted on the mounting seat.

The front view which shows the rotary electric machine of embodiment. The side view seen from the side to which the base plate which shows the motor part of embodiment is attached. The mounting seat of embodiment is shown, (a) is the side view seen from the axial direction, (b) is the top view seen from the radial direction outer side. The baseplate of embodiment is shown, (a) is the side view seen from the direction of an axis, (b) is the top view seen from the radial outside. The baseplate of the modification of an embodiment is shown, (a) is the side view seen from the direction of an axis, and (b) is the top view seen from the diameter direction outside.

  Hereinafter, a rotating electrical machine according to an embodiment will be described with reference to the drawings.

FIG. 1 is a front view of the rotary electric machine 1.
As shown in the figure, the rotary electric machine 1 includes a motor unit 2, a terminal box 3 attached to the motor unit 2, a mounting seat 4, a base plate 5, and an inverter 6. In the following description, the rotational axial direction of the motor unit 2 is simply referred to as axial direction, the rotational direction of the motor unit 2 as circumferential direction, and the radial direction of the motor unit 2 orthogonal to the axial direction and circumferential direction as radial direction. May be explained.

FIG. 2 is a side view of the motor unit 2 as viewed from the side where the base plate 5 is attached.
As shown in FIGS. 1 and 2, the motor unit 2 includes a cylindrical motor case 7 and a bracket 8 provided at one end of the motor case 7 (on the front side of the sheet in FIG. 1, the left end in FIG. 2). A cover 9 provided at the other end (right end in FIG. 2) of the motor case 7, a rotor 10 rotatably supported in the motor case 7, and a fixed portion (not shown) fixed in the motor case 7 And have a child.

  The bracket portion 8 is formed in a substantially disc shape so as to close the opening at one end of the motor case 7. Further, a bolt seat 12 capable of inserting the bolt 11 is formed on the outer peripheral portion of the bracket portion 8 so as to project radially outward. The bolt 11 is inserted into the bolt seat 12 from the outside in the axial direction, and the bolt 11 is screwed to the motor case 7, whereby the bracket portion 8 is fastened and fixed to the motor case 7.

Furthermore, a bearing housing 13 is integrally formed at the radial center of the bracket portion 8. A bearing (not shown) is provided on the inner surface side of the bearing housing 13. The bearing is for rotatably supporting one end of the rotating shaft 14 that constitutes the rotor 10.
One end of the rotation shaft 14 of the rotor 10 protrudes axially outward through the bracket portion 8. Further, the other end of the rotating shaft 14 protrudes from the other end side of the motor case 7. Further, a rotor core (not shown) is fixed to most of the axial center of the rotating shaft 14. As a rotor, a rotor having an aluminum cage rotor and a permanent magnet is provided. The rotor is magnetically attracted and repelled to the magnetic field formed by the stator. Thereby, the rotating shaft 14 rotates.

  In addition, a fan 15 is attached to a portion of the rotating shaft 14 that protrudes from the other end side of the motor case 7. The fan 15 rotates integrally with the rotating shaft 14. The fan 15 is for cooling the motor case 7 and is configured as a so-called radial fan. That is, the fan 15 generates a wind regardless of forward and reverse rotation.

  A cover 9 provided at the other end of the motor case 7 is formed in a substantially bowl shape so as to cover the fan 15 from the outside. The cover 9 is disposed with the opening side facing the motor case 7 side. Further, the cover 9 is fixed to the other end of the motor case 7 in a state in which a predetermined gap is formed between the other end of the motor case 7 and the periphery of the other end. Furthermore, the cover 9 is formed with a plurality of openings (not shown) for taking outside air into the cover 9.

The motor case 7 is formed of, for example, an aluminum alloy or the like having a high heat transfer coefficient. On the outer peripheral surface (outer surface) of the motor case 7, a plurality of fins 16 are formed so as to project over the entire surface. Further, the fins 16 are formed along the axial direction of the motor case 7 and arranged at substantially equal intervals in the circumferential direction. These fins 16 are for enhancing the heat dissipation effect of the motor case 7.
Further, the terminal box 3 is provided on the outer peripheral surface of the motor case 7. The terminal box 3 is connected to a terminal of a coil drawn from a stator (not shown) provided in the motor case 7.

  Here, on the outer peripheral surface of the motor case 7, a plurality of female screw portions 17 to which the mounting seat 4 can be attached are formed at a plurality of locations. In the present embodiment, although the female screw portion 17 is formed along the entire circumference of the outer peripheral surface of the motor case 7, the present invention is not limited to this. That is, the female screw portion 17 may be engraved at a plurality of locations on the outer peripheral surface of the motor case 7. Moreover, about the specific location where these female screw parts 17 are arrange | positioned, it describes in full detail, after description of the following mounting seat 4. FIG.

FIG. 3 shows the mounting seat 4, where (a) is a side view as viewed from the axial direction, and (b) is a plan view as viewed from the outer side in the radial direction.
As shown in FIGS. 1, 3 (a) and 3 (b), the mounting seat 4 is for fixing the motor case 7 in a predetermined installation space. The mounting seat 4 is formed of, for example, an aluminum alloy or the like having a high heat transfer coefficient. The mounting seat 4 is formed in a substantially plate shape long in the axial direction. The mounting seat 4 is formed with a plurality of bolt insertion holes 18. A bolt 30 (see FIG. 2) is inserted into the bolt insertion hole 18. The bolt 30 is screwed into the female screw portion 17 provided on the motor case 7. Thus, the mounting seat 4 is fastened and fixed to the motor case 7.

  In the mounting seat 4, female screw portions 19 are formed on both end sides in the longitudinal direction and at substantially the center in the lateral direction. The female screw portion 19 is used to fasten and fix the base plate 5 to the mounting seat 4 and is also used to fasten and fix the mounting seat 4 in a predetermined installation space. The mounting seat 4 is integrally formed with a projection 21 projecting toward the motor case 7 at a position corresponding to the bolt insertion hole 18. The convex portion 21 abuts on the outer circumferential surface of the motor case 7 at a position corresponding to the female screw portion 17. On the other hand, the surface of the mounting seat 4 opposite to the convex portion 21 is the mounting surface 4 a on which the base plate 5 and a predetermined installation space abut.

Here, as shown in detail in FIG. 1, the mounting seats 4 are used in pairs of two. At this time, the two mounting seats 4 are disposed plane-symmetrically with respect to an arbitrary plane passing through the axial center of the rotation axis 14. And it arrange | positions so that the installation surface 4a of the two attachment seats 4 may be located on the same plane.
That is, a plurality of female screw portions 17 formed in the motor case 7 are arranged such that the two mounting seats 4 are paired and the installation surfaces 4a are positioned on the same plane. In the present embodiment, around the motor case 7, the installation surface 4a of the two mounting seats 4 in three directions (upward, downward and rightward directions in FIG. 1) except for the portion where the terminal box 3 is disposed. The female screw portion 17 is disposed such that it faces.

  Here, in FIG. 1, two pairs of mounting seats 4 (two pairs of mounting seats 4) are attached such that the installation surface 4 a faces in two directions (vertical directions in FIG. 1) among three directions. It is done. And, in the present embodiment, as the attachment seat 4 for fastening and fixing the two attachment seats 4 whose installation surface 4a faces in one of the two directions (downward direction in FIG. 1) in a predetermined installation space We are using. Further, two mounting seats 4 whose mounting surface 4a faces in the other direction (upward direction in FIG. 1) of the two directions are used as the mounting seats 4 to which the base plate 5 is mounted.

FIG. 4 shows the base plate 5, where (a) is a side view seen from the axial direction, and (b) is a plan view seen from the outer side in the radial direction.
As shown in FIG. 1, FIG. 4 (a), and FIG. 4 (b), the base plate 5 is formed of, for example, an aluminum alloy or the like having a high heat transfer coefficient. The base plate 5 is formed in a substantially rectangular shape in plan view and in a plate shape so as to straddle the two mounting seats 4. A bolt insertion hole 22 through which a bolt 23 can be inserted is formed in the base plate 5 at a position corresponding to the female screw 19 of the mounting seat 4. The bolt insertion holes 22 are countersunk so that the heads of the bolts 23 do not protrude above the base plate 5. The bolt 23 is inserted into the bolt insertion hole 22 from the one surface 5 a of the base plate 5 opposite to the motor case 7, and the bolt 23 is screwed to the female screw 19 of the mounting seat 4. The base plate 5 is fastened and fixed.

One surface 5 a of the base plate 5 is formed to be a flat surface. On the other hand, the other surface 5 b on the motor case 7 side of the base plate 5 is in a state of being radially opposed to the outer peripheral surface of the motor case 7. A recess 24 is formed on the other surface 5 b of such a base plate 5.
The recess 24 is formed over the entire axial direction of the base plate 5 and is formed in a large part in the approximate center of the direction orthogonal to the axial direction. In addition, the recess 24 is formed in a substantially arc shape so as to correspond to the shape of the outer peripheral surface of the motor case 7. By forming the recess 24, contact between the base plate 5 and the motor case 7 is avoided, and a predetermined gap S is formed between the base plate 5 and the motor case 7.

  As shown in FIG. 1, an inverter 6 is disposed on one surface 5 a of the base plate 5. The inverter 6 is for performing rotation control of the rotor 10 of the motor unit 2. The inverter 6 is connected to a lead (not shown) extending from an external power supply. Moreover, the inverter 6 and the terminal box 3 are electrically connected via the lead wire not shown. Thereby, the power of the external power supply is supplied to the coil (both not shown) wound around the stator via the inverter 6 and the terminal box 3.

Next, the operation of the rotary electric machine 1 will be described.
When the power of the external power supply is supplied to the coil wound around the stator through the inverter 6 and the terminal box 3, a predetermined magnetic field is generated in the stator. Then, the permanent magnet of the rotor 10 is magnetically attracted or repelled by the magnetic field, and the rotor 10 rotates.
When the rotor 10 rotates, the fan 15 fixed to the rotating shaft 14 rotates. Since the fan 15 is a radial fan, when the fan 15 rotates, the wind is sucked from the rotation center and the wind flows in the centrifugal direction. The wind having flowed in the centrifugal direction flows along the inner surface of the cover 9 provided at the other end of the motor case 7.

  Here, the cover 9 is fixed to the other end of the motor case 7 in a state in which a predetermined gap is formed between the other end of the motor case 7 and the periphery of the other end. . For this reason, a wind is discharged from the gap between the cover 9 and the other end of the motor case 7, and the wind flows on the outer peripheral surface of the motor case 7 along the axial direction (see arrow Y1 in FIG. 2).

  At this time, since the plurality of fins 16 formed on the outer peripheral surface of the motor case 7 are formed along the axial direction, the flow of the wind is not inhibited by the fins 16. Further, a recess 24 is formed on the other surface 5 b of the base plate 5 disposed on the outer peripheral surface of the motor case 7, and a predetermined space is formed between the other surface 5 b of the base plate 5 and the outer peripheral surface of the motor case 7. A gap S is formed. Therefore, since the wind flows through the gap S, the base plate 5 does not block the flow of the wind.

In addition to the wind flowing on the outer peripheral surface of the motor case 7 and the plurality of fins 16 formed on the outer peripheral surface of the motor case 7, cooling of the motor case 7 is promoted. Further, since the base plate 5 is also cooled by the wind of the fan 15, the heat of the inverter 6 is efficiently generated.
Furthermore, the motor case 7, the mounting seat 4, and the base plate 5 are formed of, for example, an aluminum alloy or the like having a high heat transfer coefficient. Therefore, the motor case 7, the mounting seat 4, and the base plate 5 can be rapidly cooled, and the heat damage of the rotating electrical machine 1 and the inverter 6 can be reliably prevented.

Next, how to use the mounting seat 4 will be described.
As described above, the female screw portion 17 is disposed in the motor case 7 so that the installation surface 4a of the pair of (two) mounting seats 4 faces in three directions except for the position where the terminal box 3 is disposed. It is done. Therefore, the mounting direction of the mounting surface 4a of the mounting seat 4 can be changed according to the restriction of the mounting space, and the direction of the terminal box 3 can be changed by this. Further, the mounting seat 4 (female screw portion 17) other than the mounting seat 4 (female screw portion 17) used for fixing the motor case 7 to the installation space can be used to mount the base plate 5. . That is, the arrangement direction of the inverter 6 attached via the base plate 5 can also be changed along the outer peripheral surface of the motor case 7 to various directions excluding the terminal box 3.

As described above, in the motor case 7 of the rotating electrical machine 1 described above, a plurality of female screw portions 17 to which the mounting seat 4 can be attached is engraved on the entire circumference of the outer peripheral surface. The female screw portion 17 is disposed in the outer peripheral surface of the motor case 7 so that the installation surfaces 4 a of the pair of (two) mounting seats 4 face in three directions excluding the terminal box 3.
Therefore, without changing the design of the motor case 7, the direction of the terminal box 3 can be changed according to the restriction of the installation space, and the motor case 7 can be fastened and fixed to the installation space. In other words, the versatility of the motor case 7 can be enhanced.
Moreover, the inverter 6 can be attached via the base plate 5 using the mounting seat 4 which is not used. Therefore, the motor unit 2 and the inverter 6 can be integrated, and it is not necessary to provide an installation space for the inverter 6 separately. Furthermore, lead wires can be easily routed between the motor unit 2 and the inverter 6.

Further, a recess 24 is formed on the other surface 5 b of the base plate 5. The recess 24 is formed over the entire axial direction of the base plate 5 and is formed in a substantially arc shape so as to correspond to the shape of the outer peripheral surface of the motor case 7. Therefore, the contact between the base plate 5 and the motor case 7 can be avoided. Further, since the predetermined gap S can be formed between the base plate 5 and the motor case 7, the wind of the fan 15 can be flowed through the gap S. For this reason, the cooling effect of the inverter 6 attached to the motor case 7 or the base plate 5 can be enhanced.
In addition to this, the plurality of fins 16 formed on the outer peripheral surface of the motor case 7 are formed along the axial direction. Therefore, the motor case 7 can be effectively cooled without blocking the flow of wind by the fins 16.

  In the above-described embodiment, the case where an aluminum cage rotor or a rotor having a permanent magnet is provided as the rotor constituting the motor unit 2 has been described. However, the present invention is not limited to this, and it is possible to adopt motors (rotors) of various specifications as the motor unit 2.

Furthermore, in the above-described embodiment, the female screw portion of the motor case 7 is set so that the installation surface 4a of the pair of (two) mounting seats 4 faces in three directions except for the portion where the terminal box 3 is disposed. The case where 17 is arranged is described. However, the present invention is not limited to this, and the female screw 17 may be formed on the motor case 7 so that the installation surface 4 a of the mounting seat 4 faces in at least two directions. Further, the female screw portion 17 may be formed on the motor case 7 so that the installation surface 4a of the mounting seat 4 faces in three or more directions.
Moreover, in the above-mentioned embodiment, the mounting seat 4 demonstrated the case where it was used as a pair by two. However, the present invention is not limited to this, and each mounting seat 4 may be used in different applications.

  Furthermore, in the above embodiment, the case where the recess 24 formed on the other surface 5 b of the base plate 5 is formed in a substantially arc shape to correspond to the shape of the outer peripheral surface of the motor case 7 has been described. However, the present invention is not limited to this, and the recess 24 may have a shape such that contact between the base plate 5 and the motor case 7 can be avoided and a predetermined gap S can be formed between the base plate 5 and the motor case 7. Just do it. For example, when viewed from the axial direction (see FIG. 4A), the recess 24 may be formed in a rectangular shape. Alternatively, the recess 24 may be formed in a triangular shape as viewed in the axial direction.

  Moreover, in the above-mentioned embodiment, the case where the inverter 6 was attached to the base plate 5 attached to motor case 7 was demonstrated. However, the present invention is not limited to this, and it is possible to use the base plate 5 in various applications. For example, the base plate 5 may be used as a plate for attaching a name plate without attaching the inverter 6. Since a plurality of fins 16 are provided on the outer peripheral surface of the motor case 7 to enhance the cooling effect, in order to attach the name plate to the outer peripheral surface of the motor case 7, processing for attaching the name plate to the motor case 7 is performed It is necessary to apply separately. However, by attaching the name plate using the base plate 5, it is possible to omit processing for attaching the name plate to the outer peripheral surface of the motor case 7.

In the above embodiment, the case where the base plate 5 is fastened and fixed to the mounting seat 4 other than the mounting seat 4 used to fasten and fix the motor case 7 in the installation space has been described. However, the present invention is not limited to this, and it is possible to attach various things to the mounting seat 4. For example, in place of the base plate 5, various sensors (thermometers, etc.), a sunshade and a rain shade can be attached.
For example, by providing a thermometer, temperature control of the motor case 7 can be performed. For this reason, the heat damage of the rotary electric machine 1 can be prevented by stopping the rotary electric machine 1 as needed. In addition, the sunshade and the rainguard can suppress the rainwater and the like from being exposed to direct sunlight to the motor case 7 and the waterproof performance of the rotary electric machine 1 can be enhanced.

  Furthermore, in the above embodiment, in order to attach the mounting seat 4 to the motor case 7, the female screw portion 17 is engraved in the motor case 7, and the mounting seat 4 is fastened to the motor case 7 using this female screw portion 17. The case of fixing is described. However, the present invention is not limited to this, as long as an attachment hole to which the attachment seat 4 can be attached is formed in the motor case 7. For example, instead of the female screw 17 as a mounting hole, a hole for caulking pin fixing may be formed. Then, the mounting seat 4 may be attached to the motor case 7 by fixing the caulking pins to the caulking pin fixing holes.

  Moreover, in the above-mentioned embodiment, the case where the motor case 7, the mounting seat 4, and the base plate 5 are formed of, for example, an aluminum alloy or the like having a high heat transfer coefficient has been described. However, the present invention is not limited to this, and it is possible to form the motor case 7, the mounting seat 4, and the base plate 5 by various materials. However, it is preferable to form the motor case 7, the mounting seat 4, and the base plate 5 with a material having a high heat transfer coefficient.

  Furthermore, it is also possible to provide a plurality of fins 25 in the recess 24 formed in the other surface 5 b of the base plate 5. This will be described in detail below using the drawings.

5A and 5B show a modification of the base plate 5. FIG. 5A is a side view viewed from the axial direction, and FIG. 5B is a plan view viewed from the outer side in the radial direction. 5 (a) and 5 (b) correspond to FIGS. 4 (a) and 4 (b) described above.
As shown in FIGS. 5A and 5B, the plurality of fins 25 formed in the recess 24 of the base plate 5 is formed so as to project over the entire axial direction of the base plate 5. Further, the fins 25 are arranged at substantially equal intervals in the entire recess 24 along the direction orthogonal to the axial direction. Furthermore, the fins 25 are formed so as to avoid contact with the fins 16 of the motor case 7. Specifically, the protruding height of each fin 25 may be limited, or the fin 25 of the base plate 5 may be interposed between the adjacent fins 16 in the circumferential direction of the motor case 7.

  Thus, the heat dissipation area of the base plate 5 can be increased by projecting the plurality of fins 25 on the base plate 5. As a result, the cooling efficiency of the base plate 5 can be enhanced, and furthermore, the cooling efficiency of the inverter 6 (see FIG. 1) attached to the base plate 5 can be enhanced.

According to at least one embodiment described above, a plurality of female screw portions 17 to which the mounting seat 4 can be attached is engraved on the entire outer periphery of the motor case 7. The female screw portion 17 is disposed in the outer peripheral surface of the motor case 7 so that the installation surfaces 4 a of the pair of (two) mounting seats 4 face in three directions excluding the terminal box 3.
Therefore, without changing the design of the motor case 7, the direction of the terminal box 3 can be changed according to the restriction of the installation space, and the motor case 7 can be fastened and fixed to the installation space. In other words, the versatility of the motor case 7 can be enhanced.
Moreover, the inverter 6 can be attached via the base plate 5 using the mounting seat 4 which is not used. Therefore, the motor unit 2 and the inverter 6 can be integrated, and it is not necessary to provide an installation space for the inverter 6 separately. Furthermore, lead wires can be easily routed between the motor unit 2 and the inverter 6.

Further, a recess 24 is formed on the other surface 5 b of the base plate 5. The recess 24 is formed over the entire axial direction of the base plate 5 and is formed in a substantially arc shape so as to correspond to the shape of the outer peripheral surface of the motor case 7. Therefore, the contact between the base plate 5 and the motor case 7 can be avoided. Further, since the predetermined gap S can be formed between the base plate 5 and the motor case 7, the wind of the fan 15 can be flowed through the gap S. For this reason, the cooling effect of the inverter 6 attached to the motor case 7 or the base plate 5 can be enhanced.
In addition to this, the plurality of fins 16 formed on the outer peripheral surface of the motor case 7 are formed along the axial direction. Therefore, the motor case 7 can be effectively cooled without blocking the flow of wind by the fins 16.

  While certain embodiments of the present invention have been described, these embodiments have been presented by way of example only, and are not intended to limit the scope of the invention. These embodiments can be implemented in other various forms, and various omissions, replacements, and modifications can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the invention described in the claims and the equivalents thereof as well as included in the scope and the gist of the invention.

DESCRIPTION OF SYMBOLS 1 ... Rotating electric machine, 5 ... Base plate (attachment body, plate body), 5b ... Other surface (one surface), 7 ... Motor case, 10 ... Rotor, 16, 25 ... Fin, 17 ... Female screw part (attachment hole) , 24 ... recessed part

Claims (5)

A tubular motor case for housing the rotor;
A plurality of mounting holes provided on an outer side surface of the motor case, to which mounting seats for fixing the motor case can be attached;
A mounted body attached to the mounting seat;
Electric rotating machine equipped with The attached body is a plate body, and one surface of the plate body is disposed to face the outer side surface of the motor case,
The rotary electric machine according to claim 1, wherein a recess is formed on one surface of the plate body. The motor case is formed in a cylindrical shape,
The rotating electrical machine according to claim 2, wherein the recess is formed in an arc shape. The fin according to the axial direction of the said rotor is multiply arranged in the circumferential direction of the said outer surface in the at least any one of the said outer surface of the said motor case, and the said recessed part of the said plate body. The rotating electric machine according to Item 3. A cooling fan provided at one end of the rotor;
A cover provided on the motor case and covering the cooling fan;
The rotary electric machine according to any one of claims 1 to 4, comprising:

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