JP2007014156A - Electric motor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simply and electrically solder and connect electrical elements 20, 21, 21a as a portion of components in a power supply for supplying a motor 2 with power to a terminal member 18 buried into a bottom 15a of an opening in an electric motor for a power window. <P>SOLUTION: Penetration holes 15b are opened at and penetrate the bottom 15a of the opening. Exposures 18d are provided in the penetration holes 15b, and partially expose the terminal member 18. Terminals 21b of the electrical elements penetrate penetration holes 18e opened in the exposures 18d, and fixed and soldered from a back face. The penetration holes 15b are covered with a lid 22 in a watertight state. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention belongs to the technical field of electric motors such as power window motors mounted on vehicles.

For example, an electric motor such as an electric motor used for this type of power window is provided in a door, and thus needs to be installed in a narrow installation space. In recent years, an increase in the number of rotation control circuits for controlling an electric motor provided integrally with the electric motor has been increasing. In other words, such an electric motor is required to be compactly incorporated with a power feeding unit for feeding power to the motor unit and a rotation control circuit unit for controlling the rotation of the electric motor to control the opening and closing of the window glass. Is done. Therefore, the connector part provided with the terminal member is integrally formed on the gear case, and the board and the terminal member are electrically connected by incorporating the board into the board housing part formed on the gear case ( For example, by attaching a board having a connector part for external connection from the axial direction of the output shaft (armature shaft) to the board housing part of Patent Document 1) or a gear case, the terminal and the gear case provided on the board are provided. A device (for example, Patent Document 2) in which a terminal is connected in the axial direction of an output shaft is known.
JP 2000-282747 A JP 2004-159387 A

  By the way, since all of the conventional devices perform power supply to the motor unit via the substrate, when the electric element for power supply is provided in the gear case, the electric power of the rotation control circuit unit is determined. There is a problem in that an electric element for power feeding is provided on the substrate on which the element is provided, so that the substrate becomes large and the miniaturization of the gear case itself is impaired. In addition, the work of incorporating the rotation control circuit unit into the motor unit and making the electrical connection is all performed from the side of the gear case housing (opening), and the connection is obstructed by the rotation control circuit unit and is difficult to see. In some cases, this is a work in a state, and there are problems to be solved by the present invention.

The present invention was created in order to solve these problems in view of the above-described circumstances, and the invention of claim 1 provides a control unit built-in portion formed in an insulating motor housing. In an electric motor configured by inserting and incorporating a rotation control unit for controlling the rotation of the motor unit, the motor housing includes an opening for incorporating the rotation control unit into the control unit incorporation site and a connector unit for external connection And a terminal member that is electrically connected to the rotation control unit is disposed in the control unit built-in part, and the rotation control unit connection part of the control unit built-in part is disposed in the counter opening of the motor housing. An electric motor is characterized in that a through-hole penetrating to the part side is opened, and an electrical connection part between the terminal member and the rotation control part can be faced from the through-hole.
According to a second aspect of the present invention, in the first aspect, the terminal member is embedded in the control portion incorporation portion in a state where a part of the terminal member is exposed and becomes an electrical connection portion of the rotation control portion, and the exposed portion faces the through hole. An electric motor is characterized by being configured as described above.
According to a third aspect of the present invention, in the second aspect, the rotation control unit includes: a rotation control circuit unit for controlling the rotation of the motor unit; and a power supply unit including an electric element for supplying power to the motor unit. The electric motor is characterized in that at least a part of the rotation control circuit portion and the electric element is electrically connected to the exposed portion of the terminal member.
A fourth aspect of the present invention is the electric motor according to any one of the first to third aspects, wherein the electrical connection between the rotation control unit and the terminal member is made through a through hole.
According to a fifth aspect of the present invention, in the third or fourth aspect of the present invention, the terminal member comprises a motor power supply member and a rotation control circuit portion connection member, and the rotation control circuit portion is to be detected provided on the motor rotation shaft. An electric motor comprising: a detection body disposed opposite to a body; and a control unit configured to control motor rotation based on detection of rotation of the detection body.
According to a sixth aspect of the present invention, in any one of the first to fifth aspects, the opening is covered in a watertight manner through the cover body, and the through hole is covered in a watertight manner through the sealing member. It is an electric motor characterized by this.

According to the first aspect of the present invention, while the rotation control unit is incorporated from the opening, the electrical connection between the rotation control unit and the terminal member and the confirmation work are performed on the through hole provided on the side opposite to the opening. Therefore, the rotation control unit is not obstructed and the workability is improved.
According to the invention of claim 2, even if it is an embedded terminal member, the electrical connection from the through hole and the confirmation work can be reliably performed at the exposed portion provided in the terminal member.
According to the third aspect of the present invention, reliable electrical connection and confirmation can be made from the through hole for at least a part of the rotation control circuit unit and the electric elements constituting the rotation control unit.
By setting it as invention of Claim 4, the electrical connection of a rotation control part and a terminal part agent can be simply performed through a through-hole.
By setting it as invention of Claim 5, the rotation control circuit part of a motor part can be distribute | arranged collectively on a board | substrate in the state in which the detection body was also integrated.
According to the invention of claim 6, the electric motor can be easily made into a watertight structure.

  Next, embodiments of the present invention will be described with reference to the drawings. In the figure, reference numeral 1 denotes a motor assembly for a power window. The motor assembly 1 includes a motor part 2 and a speed reduction part 3. The motor part 2 includes a yoke 4 having a bottomed cylindrical shape, and the yoke. An armature 8 composed of a rotating shaft (armature shaft) 5, a commutator 6, an armature 7 and the like, one end of which is pivotally supported at the bottom of the cylinder 4; It is configured using various members such as a permanent magnet 9 facing the armature 7.

  On the other hand, the speed reduction part 3 is incorporated in the opening end 4a of the yoke 4 in a butted manner, has a flat box shape that rotatably supports the tip of the rotating shaft 5, and is molded with an insulating resin material. A housing (motor housing) 10, a worm wheel 11 meshing with a worm gear 5 a engraved on the tip side of the rotating shaft 5, an output shaft 12 provided on the worm wheel 11 and projecting from the housing 10, The housing 10 is configured by using various members such as a cover 13 that covers the wheel 11. The housing 10 is on the opposite side to the side on which the worm wheel 11 is disposed with the rotating shaft 5 interposed therebetween. On the assembly direction side of the wheel 11, a bottomed cylindrical opening 15 (in the present embodiment, the cover 13 side is open) for assembling a rotation control circuit section to be described later is formed. (Not FIG view) external coupler so as to protrude from the opening 15 to the motor unit 2 side of the axial direction of the armature shaft 5 connector 16 for connection are formed integrally.

  A terminal member (hereinafter referred to as “connector-side terminal member”) 17 extending from the connector portion 16 to the bottom surface portion 15a of the opening portion 15 and a terminal member (hereinafter referred to as “opening-side terminal member”) disposed on the opening bottom surface portion 15a. The terminal members 17 and 18 are integrally incorporated in the housing 10 by being embedded (insert molding) in the housing 10. The connector-side terminal member 17 is bent upright at the bottom surface portion 16a and the opening bottom surface portion 15a of the connector portion 16 to form projecting portions 17a, 17b, and 17c protruding from the bottom surface portions 16a and 15a. ing. On the other hand, the opening-side terminal member 18 is also formed with protruding portions 18a, 18b, and 18c that are bent upright from the opening bottom surface portion 15a and protrude from the bottom surface portion 15a. The portion 18b is for power supply, the protrusion 18a is for connection to a rotation control circuit portion 19 described later, and the protrusion 18c is for power supply to the motor unit 2.

  Further, a through hole 15b is formed in the bottom surface portion 15a of the opening, and a part of the portion embedded in the housing 10 of the opening side terminal member 18 is exposed on the front and back of the bottom surface portion 15a, so that the exposed portion 18d is formed. The exposed portion 18d includes a part of electric elements (electric parts including electronic elements if necessary) that constitute the power feeding portion, and in this embodiment, a drive system element that rotationally drives the electric motor. An in-vehicle relay 20 and capacitors (for example, aluminum electrolytic capacitors) 21 and 21a are incorporated from the opening end side of the opening 15 and soldered from the side opposite to the opening end side of the opening 15, that is, from the back side of the bottom surface portion 15a. By doing so, electrical connection is made. The back surface of the through-hole 15b is covered with a lid 22 in a watertight manner as shown in FIG. 12A after the soldering is fixed. The electric element is fixed at the exposed portion 18d. Specifically, the terminal 21b provided on the electric element is inserted into the through-hole 18e provided in the exposed portion 18d and penetrated from the back surface side of the bottom surface portion 15a. This is done by soldering the assembly part. Incidentally, as a configuration for covering the through hole 15b in a watertight manner, as shown in FIG. 12 (B), the through hole 15b may be covered with a resin material 22a.

  On the other hand, a brush holder 23 provided with a brush 23a that is in sliding contact with the commutator 6 has a power supply terminal member 23b protruding toward the housing 10 side. Terminal member 23b and terminal protrusion 18c are electrically connected.

  The rotation control circuit unit 19 is provided on the flat substrate 24 and the permanent magnet (detected body) 5b provided on the rotating shaft 5 so as to face the permanent magnet 5b. The rotation detection sensor 25 is configured to include a substrate circuit unit 26 configured to control the rotation of the motor unit 2 based on the rotation detection of the rotation detection sensor 25. The circuit unit 26 is formed on both surfaces of the substrate 24.

  The rotation control circuit unit 19 includes the protruding portions 17b and 17c of the connector-side terminal member 17 and the opening-side terminal in a state where the electrical elements 20, 21, and 21a are electrically connected to the opening-side terminal member 18. By being electrically connected (connected by soldering) to the tips of the protrusions 18a and 18b of the member 18, the opening 18 is incorporated into the opening 15, whereby the power feeding electric elements 20, 21, and 21a are incorporated into the opening bottom 15a. The rotation control circuit unit 19 is incorporated into the opening 15 in a state of being sandwiched between the rotation control circuit unit 19 and the connector side terminal protrusions 17b and 17c also serve as a power supply terminal member. The protrusion 17 c is electrically connected to the power supply protrusion 18 b of the opening-side terminal member 18. The circuit pattern is formed so that the electric element on the substrate 24 can be energized by the electrical connection between the protruding portion 17c of the connector-side terminal member 17 and the protruding portion 18b for feeding. Details are omitted. The opening 15 is covered with a cover body 28 in a watertight manner in a state where the rotation control circuit unit 19 is assembled.

  In the embodiment of the present invention configured as described, the housing 10 is integrally formed with a connector portion 16 and an opening portion 15 for incorporating the rotation control circuit portion 19, and a part constituting the power feeding portion. The electric elements 20, 21, and 21a are electrically connected to the terminal member 18 provided on the opening bottom surface portion 15a so as to be electrically connected to the power feeding section and the rotation control circuit section 19, and these electric elements As in the case where the rotation control circuit unit 19 is provided with 20, 21, 21a, the rotation control circuit unit 19 is not increased in size and can be made compact, and thus the housing 10 can also be made compact.

  In addition, the electrical connection between the power supply terminal member protrusions 17 c and 18 b of the connector terminal member 17 and the opening-side terminal member 18 is connected to the opening 15 of the rotation control circuit 19. As a result, the assembly of the rotation control circuit unit 19 to the opening 15 can be used for electrical connection between the terminal members, and the workability of the assembly work is improved.

  Further, the opening side terminal member 18 has an exposed portion 18d exposed by a through hole 15b formed in the bottom surface portion 15a of the opening, and the exposed portion 18d is electrically connected to the power feeding electric elements 20, 21, 21a. Although the connection can be made, the soldering operation for making this electrical connection can be performed not on the opening side of the opening 15 but on the opposite back side, that is, on the outer surface side of the housing 10. Workability is improved. The method of fixing the electric element to the terminal member is not limited to soldering, and can be performed by, for example, forcibly pressing and connecting the connection terminal of the electric component into the connection hole formed in the terminal member. . Further, since the through hole 15b is covered with the lid 22 in a watertight manner, the motor assembly 1 can be easily made into a watertight structure.

  In addition, the electric elements 20, 21, 21 a for the power feeding section can be arranged by effectively using the space between the opening bottom surface section 15 a and the rotation control circuit section 19, so that the size can be further reduced. Can be achieved. The rotation control circuit unit 19 is incorporated in a state of being supported by the terminal protrusions 17b, 17c, 18a, and 18b protruding from the opening bottom surface part 15a. As a result, the protrusions 17b, 17c, 18a, and 18b are connected to the rotation control circuit. The function as a bus bar for attaching and fixing the portion 19 is exhibited, and the rotation control circuit portion 19 can be firmly attached. The rotation control circuit unit 19 controls the rotation of the electric motor on the substrate 24 based on the rotation detection sensor 25 that detects the rotation of the permanent magnet 5 a also received by the armature shaft 5 and the rotation detection by the rotation detection sensor 25. Since it is configured to include the substrate circuit unit 26 configured to be suitable, it is possible to arrange related items for performing rotation control based on rotation detection into one compactly and simplify the structure. Can be achieved.

  Needless to say, the present invention is not limited to the above-described embodiment and can be variously modified. For example, in the present embodiment, the terminal members 17 and 18 are embedded in the housing 10, but may be laid on the bottom surface portion 15 a on the opening side of the housing 10. Further, the projecting portions 17b and 18c serving as power supply terminal members are electrically connected to each other by the substrate 24 so that the power feeding projecting portion 18c to the motor unit 2 is energized. The projecting portion 17c may be branched on the bottom surface portion 15a side, and one may be directly connected to the substrate 24 side and the other to the projecting portion 18b.

  Furthermore, in the present embodiment, the electric element is electrically connected to the exposed portion 18d exposed at the through-hole 15b portion opened in the opening bottom surface portion 15a. However, the present invention is not limited to this. For example, a bus bar may be provided on the rotation control circuit unit 19 side, and the front end portion of the bus bar may be electrically connected to the exposed portion 18d. In this case, as in the above embodiment, the electric element may be It can be electrically connected to the exposed portion 18d, and an electrical element is connected to the rotation control circuit portion side, and only the bus bar provided on the rotation control circuit side is electrically connected to the exposed portion 18d. Can also be implemented.

It is a front view of a motor assembly. It is a rear view of a motor assembly. It is sectional drawing of a motor assembly. It is a front side perspective view of the state which removed the cover body of the housing with which the brush holder was assembled | attached. It is a front view of the state which abbreviate | omitted the rotation control circuit part of the housing with which the brush holder was assembled | attached. It is a front perspective view of the state which omitted the rotation control circuit part of the housing with which the brush holder was assembled. It is a front perspective view of the state which omitted the rotation control circuit part and electric element of the housing with which the brush holder was assembled. It is a rear view of the state which abbreviate | omitted the cover body of the housing with which the brush holder was assembled | attached. It is a perspective view which shows the wiring state which abbreviate | omitted the base member of the connector unit. It is the side view seen from the brush holder side of the housing with which the brush holder was assembled | attached. It is a front view which shows the wiring state which abbreviate | omitted the base member of the connector unit. The through-hole site | part is shown in the state covered with watertight, Comprising: (A) shows 1st embodiment and (B) is a fragmentary sectional view which shows 2nd embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Motor unit 2 Motor part 3 Deceleration part 4 Yoke 5 Armature shaft 5a Permanent magnet 10 Housing 15 Opening part 15a Bottom part 16 Connector part 17 Connector side terminal member 18 Opening side terminal member 19 Rotation control circuit part 20, 21, 21a Electron Element 22 Lid 24 Substrate 25 Rotation detection sensor 26 Substrate circuit part 28 Cover

Claims (6)

In the electric motor configured by inserting and incorporating a rotation control unit for controlling the rotation of the motor unit into the control unit incorporating part formed in the insulating motor housing,
The motor housing is integrally formed with an opening for incorporating the rotation control unit into the control unit incorporating part and a connector unit for external connection,
A terminal member electrically connected to the rotation control unit is disposed in the control unit built-in part,
In the rotation control part connection part of the control part built-in part, a through-hole penetrating to the opposite side of the motor housing is opened,
An electric motor characterized in that an electrical connection part between a terminal member and a rotation control part can be exposed from the through hole.   2. The terminal member according to claim 1, wherein a part of the terminal member is embedded in a control part incorporation part in a state where part of the terminal member is exposed and becomes an electrical connection part of the rotation control part, and the exposed part can be seen from the through hole. Electric motor.   In Claim 2, the rotation control unit is configured by a rotation control circuit unit for controlling the rotation of the motor unit, and a power supply unit including an electric element for supplying power to the motor unit, and the terminal member An electric motor characterized in that at least a part of a rotation control circuit section and an electric element is electrically connected to the exposed portion.   4. The electric motor according to claim 1, wherein electrical connection between the rotation control unit and the terminal member is performed through a through hole.   5. The terminal member according to claim 3, wherein the terminal member includes one for supplying power to the motor and one for connecting the rotation control circuit unit, and the rotation control circuit unit is disposed to face a detection object provided on the motor rotation shaft. An electric motor comprising: a detection body; and a control unit that controls rotation of the motor based on detection of rotation of the detection body.   6. The electric motor according to claim 1, wherein the opening is covered in a watertight manner through a cover body, and the through hole is covered in a watertight manner through a sealing member.

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