JP2009189179A - Motor device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a motor device that achieves reduction in the number of fixing members required for fixing switching elements and an inner case, reduction in costs, reduction of time and efforts for fixing-work, and suppression of the occurrence of failures due to non-following in expansion/contraction of a fixing part. <P>SOLUTION: The motor device includes each engaging member 10 that is fixed to a rear housing 53 by each screw 8 while each element locking piece 12, 12 is engaged with each switching element 9, 9 and each case locking piece 13, 13 is engaged with an inner case 6. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a motor device, and more particularly to a motor device on which a switching element for drive control is mounted.

Conventionally, an electric fan device used for cooling a radiator device of a passenger car includes a motor device that rotates the fan.
In such a motor device, a brushless motor uses a switching element such as a MOS transistor for switching the current.

Such switching elements are known to be screwed to the motor housing (see, for example, Patent Document 1), or those that are pressed and fixed using a spring.
Utility Model Registration Gazette No. 2579791

However, when the switching elements are screwed one by one or pressed with a spring as in the above-described prior art, the number of screws and springs is increased and the number of work steps is increased, which increases the cost. This causes an increase in labor.
In particular, when a fixing member such as a screw or a screw is used for fixing the switching element or the spring, the fixing portion by the fixing member does not follow expansion and contraction due to heat. Stress or looseness may occur in the solder portion between the terminal of the switching element and the bus bar connected to the terminal and energized, and this may cause a failure.
Furthermore, in the motor device, the inner case that supports the bus bar is also fixed to the motor housing. For this fixing, a fixing member such as a screw is used, which increases the cost, labor, and non-stretching. It had a problem of failure due to tracking.

  The present invention has been made by paying attention to the above-mentioned conventional problems, and can reduce the number of fixing members necessary for fixing the switching element and the inner case, thereby reducing the cost and labor of fixing work. It is an object of the present invention to provide a motor device that enables reduction and suppression of failure occurrence due to non-tracking of a fixed portion.

  To achieve the above object, the present invention provides a motor housing, a rotating shaft rotatably supported by the motor housing, a rotor that rotates integrally with the rotating shaft, and a permanent magnet that is circumferentially arranged on the rotor. And a stator that is arranged in a circumferential shape facing the permanent magnet and supported by the motor housing, a switching element that is supported by the motor housing and switches an energization state to the electromagnet, and the motor An inner case that is supported by a housing and includes a bus bar that energizes the electromagnet through the switching element; an element engaging portion that engages with the switching element and fixes the switching element to the motor housing; and A case engaging portion that engages with the inner case and fixes the inner case to the motor housing, An engaging member fixed to the motor housing by a fixing member in a state in which a child engaging portion and a case engaging portion are engaged with the switching element and the inner case. It was set as the motor apparatus characterized.

  According to a second aspect of the invention, in the motor device of the first aspect, the element engaging portion and the case engaging portion are formed in a leaf spring shape that is elastically deformed in the engaging direction. It was set as the motor apparatus characterized.

  According to a third aspect of the present invention, in the motor device according to the first or second aspect, an assembly hole is opened in the inner case, and the engaging member is coupled with the switching element. The motor device is characterized in that it is engaged with an edge of the assembly hole of the switching element and the inner case in a state of being arranged in the attachment hole.

  According to a fourth aspect of the present invention, in the motor device according to any one of the first to third aspects, the engagement member is formed of a metal plate, and the inner case includes: The motor device is characterized in that a grounding portion that is grounded to the motor housing made of metal is provided at a position that comes into contact with the case engaging portion when the case engaging portion is engaged.

  The invention according to claim 5 is the motor device according to any one of claims 1 to 4, wherein the engaging member is a pair of the element engaging portions arranged in a straight line; The motor device is characterized in that it is formed in a cross shape in which a pair of case engaging portions arranged on a straight line are orthogonal to each other.

  According to a sixth aspect of the present invention, in the motor device according to any one of the first to fifth aspects, a pedestal for fixing the fixing member is provided on the motor housing. A positioning device for positioning the engaging member with respect to the pedestal is formed between the engaging member and the motor device.

  According to a seventh aspect of the present invention, in the motor device according to the sixth aspect, a screw hole for fastening a screw as the fixing member is formed in the pedestal, and the positioning portion is a rotation of the screw. The motor device is formed so as to be engageable with the pedestal in a direction.

  In the present invention, when the switching element and the inner case are assembled to the motor housing, first, the switching element and the inner case are positioned with respect to the motor housing, and the switching element and the inner case are supported by the motor housing. Next, the element engaging portion of the engaging member is engaged with the switching element, the case engaging portion of the engaging member is engaged with the inner case, and then the engaging member is fixed. It fixes to a motor housing with a member. Since the engaging member fixed to the motor housing with the fixing member is engaged with the switching element and the inner case, the switching element and the inner case are also fixed to the motor housing.

Therefore, the switching element and the inner case can be fixed to the motor housing by one fixing operation of the fixing member, and the number of fixing members necessary as a whole can be reduced. As a result, the cost can be reduced, the number of fixing operations by the fixing member can be reduced, and the labor of the fixing operation can be reduced.
In addition, since the switching element and the inner case are not directly fixed by a fixing member such as a screw, when the switching element or the inner case expands or contracts due to heat during driving, the expansion and contraction is caused between the switching element and the engaging member. In the meantime, it is possible to absorb between the inner case and the engaging member, and it is possible to suppress the occurrence of stress and loosening due to non-tracking / extension of the fixed portion, and to prevent failure caused by this. .

  In the second aspect of the invention, since the engaging member is formed in a leaf spring shape that is elastically deformed in the engaging direction, each engaging portion is elastic when the switching element and the inner case expand and contract due to heat during driving. Deformation can be followed, and the occurrence of a failure due to non-following expansion and contraction can be prevented.

In the invention according to claim 3, the switching element and the engaging member are arranged in the assembly hole formed in the inner case, and the engagement member is arranged on the switching element and the edge of the assembly hole. It was made to engage.
Therefore, it is possible to efficiently fix the inner case and the switching element by forming the assembly holes at positions necessary for fixing the inner case.

According to the fourth aspect of the present invention, when the case engaging portion of the engaging member is engaged with the inner case, the case engaging portion is brought into contact with the ground portion of the inner case. Thereby, a switching element is connected to the earth | ground part of an inner case via a metal engaging member.
For this reason, the single operation | work which connects a switching element to an earth | ground part becomes unnecessary, and the further workability | operativity improvement can be aimed at.

In the invention according to claim 5, since the engaging member is formed in a substantially cross shape in which the pair of element engaging portions and the pair of case engaging portions are orthogonal to each other, by one engaging member, Two switching elements and two locations of the inner case can be fixed simultaneously.
Accordingly, the number of necessary engaging members and fixing members can be reduced as compared with one fixing one switching element by one engaging member and one fixing one place of the inner case. The number of fixed operations can be reduced, and the work efficiency can be further improved.
In addition, since the reaction force for pressing the switching element and the reaction force for pressing the inner case are input symmetrically, the switching element and the inner case can be fixed in a balanced manner.

  According to the sixth aspect of the present invention, the positioning with respect to the motor housing can be performed by positioning the positioning portion of the engaging member with respect to the base when performing the fixing operation with the engaging member. For this reason, the positioning of the engaging member with respect to the motor housing is facilitated, and the working efficiency can be improved.

According to the seventh aspect of the present invention, in the fixing operation of the engaging member, when the screw is fastened to the screw hole of the pedestal, if the rotational force due to this fastening is transmitted to the engaging member, the positioning portion is engaged with the pedestal. As a result, the engagement member is prevented from rotating by this rotational force.
Thus, since the engaging member can be prevented from being rotated by the screw at the time of fastening the screw by using the positioning portion, further improvement in efficiency of workability can be achieved at low cost.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
The electric fan device of this embodiment includes a motor housing (5), a rotation shaft (2) rotatably supported by the motor housing (5), and a rotor (1) that rotates integrally with the rotation shaft (2). 3), a permanent magnet arranged circumferentially on the rotor (3), and a stator (4a) arranged circumferentially facing the permanent magnet and supported by the motor housing (5) ( 4), a switching element (9) for switching the energization state to the electromagnet (4a), and a bus bar (65) for energizing the electromagnet (4a) via the switching element (9). An inner case (6); an element engaging portion (12) for engaging the switching element (9) to fix the switching element (9) to the motor housing (5); and the inner case (6) Before engaging A case engaging part (13) for fixing the inner case (6) to the motor housing (5) is provided, and the element engaging part (12) and the case engaging part (13) are connected to the switching element (9). And an engaging member (10) fixed to the motor housing (5) by a fixing member (8) in a state of being engaged with the inner case (6). It is a motor device.

  Below, based on FIGS. 1-6, the motor apparatus M of Example 1 of the best embodiment of this invention is demonstrated.

The motor device M according to the first embodiment is a so-called brushless motor, and is used in an electric fan device A that cools a radiator, a condenser, and the like of an automobile (not shown).
As shown in FIG. 6, the electric fan device A includes a fan 1, a rotating shaft 2 that rotates integrally with the fan 1, and a motor device M of Example 1 that rotates the rotating shaft 2.
The motor device M includes a rotor 3 that is fixed to the outer periphery of the rotating shaft 2 and rotates integrally with the rotating shaft 2, a stator 4 that is disposed on the outer periphery of the rotor 3, and a motor housing 5 that accommodates these. I have.

The fan 1 is attached to the front end of the rotating shaft 2 at the front of the vehicle (in the direction of the arrow FR), and has an inner peripheral cylindrical portion 1a fixed to the rotating shaft 2 and a blade portion extending integrally from the inner peripheral cylindrical portion 1a in the circumferential direction. 1b and an outer peripheral cylindrical portion 1c integrally formed on the outer periphery of the blade portion 1b, and at the time of rotation, blows air behind the vehicle (in the direction of the arrow RR) in the drawing.
The rotor 3 is provided integrally with the outer periphery of the rotating shaft 2 and includes a plurality of permanent magnets (not shown). On the other hand, the stator 4 is provided on the outer periphery of the rotor 3, and is provided with a plurality of electromagnets 4a in a circumferential shape. The fan 1 is rotated integrally.

The motor device M and the rotating shaft 2 are rotatably supported by the motor housing 5.
The motor housing 5 is made of a cast metal such as aluminum, which has excellent thermal conductivity. The motor housing 5 includes a front housing 52 and a rear housing 53 that are combined with each other to form a housing portion 51. A front-side bearing 54 that supports the end of the rotating shaft 2 on the front side of the vehicle is provided, and a rear-side bearing 55 that supports the end of the rotating shaft 2 on the rear side of the vehicle is installed at the center of the rear housing 53. ing.

  The rear housing 53 is formed in a substantially U-shaped cross-sectional shape in which a flange 53b is erected on the outer periphery of a disc-shaped bottom wall 53a. And in the bottom wall 53a, the inner case 6 and the board | substrate 7 are provided in the back surface 53c on the opposite side to the accommodating part 51 in the axial direction.

Next, the fixing structure of the inner case 6 and the switching element 9 described later will be described.
As shown in FIG. 1, a pedestal 531 is formed at three positions in the center of the back surface 53c of the bottom wall 53a, and a cylindrical section 532 is formed at one position in the center and a plurality of positions on the outer periphery. Has been.
The pedestal 531 is formed in a substantially rectangular parallelepiped shape, and a screw hole 531a in which a female screw for fastening a screw 8 as a fixing member is formed on the inner periphery is provided at the center.
The cylindrical portion 532 also has a screw hole 532a formed in the center thereof, like the base 531.

  A control circuit (not shown) for forming a signal for driving the motor device M at a rotational speed corresponding to this signal is mounted on the substrate 7 from a signal for obtaining a target air volume from an air conditioning control device (not shown). ing.

  The inner case 6 is formed in a plate shape in which a plurality of assembly holes 61, 62, 63 are opened in the central portion by resin, and is fastened to the cylindrical portion 532 at one central location and a plurality of peripheral locations. A screw insertion hole 64 that allows a screw 8 (not shown) to pass therethrough is opened. Furthermore, a plurality of bus bars 65 for supplying power to the electromagnet 4a are integrally embedded in the inner case 6. The bus bar 65 includes a GND line (ground portion) 66 (see FIG. 3) for grounding the motor housing 5 made of metal.

Of the plurality of holes opened in the inner case 6, three assembly holes 61, 61, 61 are holes for installing the switching element 9, and one of these assembly holes 61, 61, 61 is provided. As shown in FIG. 3 showing the assembly holes 61, two switching elements 9, 9 are installed in one assembly hole 61, respectively.
In addition, a current-carrying bus bar 65 is disposed on one side edge of the assembly hole 61, and a GND line 66 is disposed on the opposite edge.

The switching element 9 performs switching for switching the energization phase to the electromagnet 4 a of the stator 4, and includes a substantially rectangular parallelepiped main body 90 and connection terminals 91, 92, 93 extending from the main body 90.
The connection terminals 91 and 92 are connected to different bus bars 65 of the inner case 6, respectively. The connection terminal 93 is connected to a control circuit (not shown) provided on the substrate 7. Further, when assembled to the rear housing 53, an insulating sheet 94 shown in FIG. 1 is interposed between the bottom wall 53a.

In order to assemble the switching element 9 and the inner case 6 to the rear housing 53 of the motor housing 5, an engaging member 10 and a screw 8 as a fixing member are used.
In the first embodiment, as shown in FIG. 1, three sets of engagement members 10 and screws 8 are used to assemble six switching elements 9 and one inner case 6 to the motor housing 5. In addition, a plurality of screws 8 (not shown) are used.

  The engaging member 10 is formed by a metal plate in a substantially cross shape as shown in the figure, and as shown in an enlarged view in FIG. 2, a base 11 and a pair of element locking pieces (element engaging portions) 12. , 12 and a pair of case locking pieces (case engaging portions) 13, 13.

  The base 11 is formed in a substantially square plate shape, and a screw insertion hole 11a through which a screw 8 as a fixing member is inserted is formed in the center.

  The element locking piece 12 and the case locking piece 13 are each integrally extended outward from each of the four sides of the base 11 and formed in a leaf spring shape that can be deformed in the thickness direction. The element locking pieces 12 and 12 and the pair of case locking pieces 13 and 13 are arranged on substantially the same line, and are arranged in an orthogonal direction so as to form a substantially cross shape in plan view.

Further, the element locking piece 12 and the case locking piece 13 respectively extend upward from the four sides of the base portion 11 and extend outward from the rising portions 12a and 13a. The locking portions 12b and 13b form a substantially L-shaped cross section.
Then, the locking portion 12b of the element locking piece 12 and the locking portion 13b of the case locking piece 13 are curved to protrude to the side in contact with the switching element 9 and the inner case 6 to be locked. 12c and 13c are formed (see FIGS. 4 and 5).

Furthermore, the base 11 is formed with an engagement leg (positioning part) 11b. As shown in FIG. 3, the pair of engaging legs 11 b includes two pairs of engaging legs 11 b and 11 b sandwiching the element locking pieces 12.
These engaging legs 11b extend obliquely downward from the base 11, and as shown in FIGS. 4 and 5, both side surfaces 531c of the pedestal 531 in a state where the base 11 is in contact with the surface 531b of the pedestal 531. Is formed in such a length that it engages in the circumferential direction with the screw hole 531a as the center and the tip of the screw hole 531a reaches the back surface 53c of the bottom wall 53a of the rear housing 53.

Next, the operation of the first embodiment will be described.
First, the assembly procedure of the inner case 6 and the switching element 9 will be described.
In this case, as shown in the perspective view of FIG. 1, the inner case 6 is first positioned with respect to the rear housing 53 of the motor housing 5. This positioning is arranged at a position where the screw insertion hole 64 of the inner case 6 overlaps the screw hole 532a of the rear housing 53. At this time, the pedestal 531 is disposed at substantially the center of the assembly holes 61, 61, 61.

  Next, a pair of insulating sheets 94, 94 are laid in each assembly hole 61, and the switching elements 9, 9 are disposed thereon, respectively. At this time, the connection terminals 91 and 92 of each switching element 9 are connected to the bus bar 65 of the inner case 6 as shown in FIG.

Next, the engaging member 10 is assembled to the base 531 of the rear housing 53. At this time, each of the engaging legs 11b is brought close to or in contact with the side surface 531c of the base 531, thereby positioning in the arrow X direction in FIG. 3, and in this state, it is slid in the arrow Y direction as necessary. The center of the screw hole 531a of the pedestal 531 and the screw insertion hole 11a of the base 11 of the engaging member 10 are arranged at substantially the same position.
When the engaging member 10 is arranged in this way, the element locking pieces 12 and 12 come into contact with the surface of the main body 90 of the switching element 9 as shown in FIGS. As shown in FIGS. 3 and 5, the pieces 13 and 13 abut against the peripheral edge of the assembly hole 61 of the inner case 6, and the element locking piece 12 and the case locking piece 13 are connected to the switching element 9 and the inner case. 6 is engaged in the vertical direction of FIGS. 4 and 5. Further, at this time, the one case locking piece 13 contacts the GND line 66 as shown in FIG.

Next, the screw 8 is inserted into the screw insertion hole 11 a of the base 11 of the engagement member 10 and fastened to the screw hole 531 a of the base 531.
At this time, as shown in FIGS. 4 and 5, when the back surface of the base 11 is pressed against the surface 531 b of the pedestal 531, the end of the engaging leg 11 b contacts the back surface 53 c of the bottom wall 53 a of the rear housing 53. After the contact, the elastic deformation occurs, the reaction force is applied to the fastening load, and an initial load that prevents the screw 8 from loosening is applied.
At the same time, the curved portions 12c and 13c of the locking pieces 12 and 13 come into contact with the switching element 9 and the inner case 6, respectively, and when the fastening load of the screw 8 is applied, the locking pieces 12 and 13 Due to the elastic deformation, the bending portions 12c and 13c are brought into pressure contact with the switching element 9 and the inner case 6 by the reaction force. Thereby, the inner case 6 and the switching elements 9 and 9 are pressed and fixed to the rear housing 53.

  Further, in order to elastically deform the engaging leg 11b and the locking pieces 12, 13 as described above, the base 11 is pressed against the head of the screw 8 by the reaction force, and the engaging member 10 is screwed by the friction. The rotation of the engagement member 10 is restricted by the engagement of each engagement leg 11 b with the side surface 531 c of the base 531.

When the engaging member 10 is fixed to the rear housing 53 as described above, the screw 8 (not shown) similar to the screw 8 is further fastened to the screw hole 532a of each cylindrical portion 532, and the center of the inner case 6 is secured. The part and the outer peripheral part are firmly fixed.
Thereafter, the board 7 and the like are further assembled, and at that time, the connection terminal 93 of the switching element 9 is connected to a circuit in which the board 7 is not shown.

In the motor device M assembled as described above, when the switching element 9 and the inner case 6 contract due to heat during driving, the contraction in the direction perpendicular to the back surface 53c of the bottom wall 53a It can follow by elastically deforming 12 and 13. Further, the contraction in the direction along the back surface 53c of the bottom wall 53a is such that the locking pieces 12 and 13 are merely pressed against the switching element 9 and the inner case 6 by the curved portions 12c and 13c. It can absorb shrinkage by moving.
Therefore, the contraction of the switching element 9 and the inner case 6 can prevent the fixing portion of the engaging member 10 by the screw 8 from being stressed or loosened, thereby preventing a failure or breakage caused by this. .
Furthermore, since an initial load is applied between the engagement member 10 and the screw 8 due to elastic deformation of the engagement leg 11b, these fastening portions are unlikely to loosen due to drive vibration.

As described above, in the first embodiment, the two switching elements 9 and 9 are fixed by one engaging member 10 and the two portions of the inner case 6 are fixed. The number of screws 8 necessary for fixing 6 and the number of fastening work steps can be reduced.
Thereby, the cost can be reduced and the labor of fixing work can be reduced.

  In addition, since the switching element 9 and the inner case 6 are not directly fixed by the fixing member such as the screw 8 at the engaging portion by the engaging member 10, the switching element 9 and its switching element 9 are heated by the heat when the switching element 9 is driven. When the peripheral inner case 6 expands and contracts, the expansion and contraction can be absorbed by the relative movement of the respective locking pieces 12, 13 and the switching element 9 and the inner case 6, and stress and loosening due to non-extension / contraction of the fixed portion. Can be prevented, and failure caused by this can be prevented.

  Furthermore, in Example 1, since the engaging member 10 is formed of a metal leaf spring, when the switching element 9 and the inner case 6 expand and contract as described above, even if the engaging member 10 is elastically deformed, it can be expanded and contracted. It is possible to follow, and it is possible to achieve at a higher level that the occurrence of stress and loosening due to non-extension / non-following of the fixed portion is suppressed and the failure caused by this is prevented.

  Moreover, in the first embodiment, the engaging member 10 is formed in a substantially cross shape in which the pair of element locking pieces 12 and 12 and the pair of case locking pieces 13 and 13 are arranged at a substantially right angle. In addition to being able to fix two switching elements 9 and 9 and two places of the inner case 6 at the same time by one engaging member 10, a reaction force that holds down the switching element 9.9 at that time Since the reaction force that presses the inner case 6 is input symmetrically, the switching elements 9 and 9 and the inner case 6 can be fixed in a well-balanced manner.

In addition, in the first embodiment, the assembly case 61 is formed in the inner case 6, the switching elements 9 and 9 are arranged in each assembly hole 61, and the engaging member 10 is connected to the switching elements 9 and 9 and the assembly. It was made to engage with the edge of the attachment hole 61.
For this reason, regardless of the position of the switching elements 9, 9, the pair of switching elements 9, 9 and the inner case 6 can be efficiently fixed by the single engaging member 10 as described above.

In the first embodiment, the engaging member 10 is made of metal, and the GND line 66 is brought into contact with the GND line 66 of the inner case 6 when the case locking piece 13 is engaged with the inner case 6. Arranged.
For this reason, the switching element 9 is connected to the GND line 66 through the engaging member 10, and the separate connection work to the GND line 66 of the switching element 9 becomes unnecessary, and the workability | operativity can be improved further.

Further, in the first embodiment, the engaging member 11 is formed with the engaging leg 11b that can be positioned in contact with or close to the pedestal 531 formed in the rear housing 53, so that the engaging member 10 can be easily positioned with respect to the pedestal 531. Thus, the work efficiency can be improved.
In addition, in the first embodiment, two pairs of the engaging legs 11b are formed so as to sandwich the pedestal 531, so that the positioning in the arrow X direction is more reliable than that in which one to three engaging legs 11b are formed. Yes, excellent workability.
In addition, in the first embodiment, the engaging leg 11b is engaged with the base 531 in the rotational direction when the screw 8 is fastened, so that a rotational force acts on the engaging member 10 when the screw 8 is fastened. As compared with the case where the rotation occurs, the trouble of returning the engagement member 10 to the normal position is eliminated, and the workability can be improved.

  As mentioned above, although embodiment and Example 1 of this invention were explained in full detail with reference to drawings, specific structure is not restricted to this Embodiment and Example 1, and does not deviate from the summary of this invention. A degree of design change is included in the present invention.

  For example, in the first embodiment, the motor device used in the electric fan device A for cooling such as an automobile radiator is shown, but the motor device of the present invention can be applied to other than the electric fan device. However, the present invention is not limited to those for automobiles, and can be used for other vehicles such as trains, industrial equipment other than vehicles, and the like.

  Moreover, in Example 1, although the engaging member 10 formed from the metal spring material was shown as an engaging member, it is not limited to this. For example, the switching element and the inner case may be fixed by an engaging member that does not have elasticity. Even in this case, the effect of the invention of claim 1 can be obtained. Moreover, you may use the thing made from resin as an engaging member. Also in this case, the effects of the inventions of the first and second aspects can be obtained.

Further, the shape of the engaging member is not limited to the substantially cross shape shown in the first embodiment. In other words, in the present invention, the engaging member only needs to include at least the element engaging portion and the case engaging portion, and therefore, with one engaging member, one switching element and one location of the inner case In this case, it is formed in a rectangular shape when viewed from above, and is engaged with the switching element and the inner case at both ends thereof, or formed in an L shape, The switching element and the inner case can be engaged at the tip.
Or you may increase the number of each locking pieces 12 and 13 rather than the engaging member 10 shown in Example 1, and may form in shapes other than a cross.

  In the first embodiment, the plate-like element locking pieces 12 and the case locking pieces 13 having elasticity are shown as the engaging portions of the engaging member. It is not limited to things. In short, as long as it can be engaged with the switching element 9 or the inner case 6, other shapes such as a claw shape may be used. In this case, elasticity may or may not be given to the engaging portion.

Moreover, in Example 1, although the engagement leg 11b as a positioning part formed what was formed in four places of the base 11, it is not limited to this, The positioning part should just be provided in at least one place. . Even in this case, it is possible to prevent the engaging member from rotating by positioning the engaging member and engaging the base when the screw is fastened.
Further, the positioning portion is not limited to the leg-shaped engaging leg 11b shown in the first embodiment, and for example, a part of the base portion 11 is recessed from the top to the bottom so as to protrude downward. The convex part etc. which were made can also be used. In this case, the convex portion may be engaged with the side surface 531c of the pedestal 531 in the same manner as in the first embodiment. However, the present invention is not limited to this, and a concave portion is formed on the surface 531b of the pedestal 531. A convex portion may be inserted into and positioned and engaged in the circumferential direction.

  In the first embodiment, the screw 8 is shown as a fixing member for fixing the engaging member 10 to the motor housing 5. However, the fixing member is not limited to the screw 8 and may be a screw or a clip. You may use the member which fixes another member.

It is a disassembled perspective view which shows the principal part of the motor apparatus M of Example 1 of the best embodiment of this invention. It is a perspective view which shows the engaging member 10 used for the motor apparatus M of Example 1. FIG. FIG. 3 is a plan view showing a portion where the switching elements 9, 9 and the inner case 6 are fixed by the engaging member 10 in the motor device M according to the first embodiment. FIG. 6 is a cross-sectional view showing a fixed portion of the switching elements 9 and 9 by the engaging member 10 in the motor device M of Embodiment 1, and shows a state cut at the position of line S4-S4 in FIG. FIG. 6 is a cross-sectional view showing a fixed portion of the inner case 6 by the engaging member 10 in the motor device M of Embodiment 1, and shows a state cut at the position of line S5-S5 in FIG. 3. It is a longitudinal cross-sectional view which shows the electric fan apparatus A to which the motor apparatus M of Example 1 is applied.

Explanation of symbols

2 Rotating shaft 3 Rotor 4 Stator 4a Electromagnet 5 Motor housing 6 Inner case 8 Screw (fixing member)
9 Switching element 10 Engagement member 11b Engagement leg (positioning part)
12 Element locking piece (element engaging part)
13 Case locking piece (case engaging part)
53 Rear housing 61 Assembly hole 65 Bus bar 66 GND line (grounding part)
531 Base M Motor Device

Claims (7)

A motor housing;
A rotating shaft rotatably supported by the motor housing;
A rotor that rotates integrally with the rotating shaft;
Permanent magnets arranged circumferentially on the rotor;
A stator that is supported by the motor housing with an electromagnet arranged circumferentially facing the permanent magnet,
A switching element that is supported by the motor housing and switches an energization state to the electromagnet;
An inner case provided with a bus bar supported by the motor housing and energizing the electromagnet through the switching element;
An element engaging portion that engages with the switching element and fixes the switching element to the motor housing; and a case engaging portion that engages with the inner case and fixes the inner case to the motor housing; An engagement member fixed to the motor housing by a fixing member in a state where the element engagement portion and the case engagement portion are engaged with the switching element and the inner case;
A motor device comprising:   The motor device according to claim 1, wherein the element engagement portion and the case engagement portion are formed in a leaf spring shape that is elastically deformed in the engagement direction. An assembly hole is opened in the inner case,
The engagement member is engaged with an edge of an assembly hole of the switching element and the inner case in a state of being disposed in the assembly hole together with the switching element. The motor device according to claim 1 or 2. The engaging member is formed of a metal plate material,
The inner case is provided with a grounding portion that is grounded to the motor housing made of metal at a position that comes into contact with the case engaging portion when the case engaging portion is engaged. The motor device according to any one of claims 1 to 3.   The engagement member is formed in a cross shape in which a pair of element engagement portions arranged on a straight line and a pair of case engagement portions arranged on a straight line are orthogonal to each other. The motor device according to any one of claims 1 to 4. The motor housing is provided with a base for fixing the fixing member,
The positioning part for positioning the engaging member with respect to the pedestal is formed between the pedestal and the engaging member. Motor device. A screw hole for fastening a screw as the fixing member is formed in the pedestal,
The motor device according to claim 6, wherein the positioning portion is formed to be engageable with the pedestal in a rotation direction of the screw.

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