JP2010166660A - Motor with reduction gear - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wiper motor wherein the length of a connector can be easily changed. <P>SOLUTION: The holder 32 of a connector 31 is fixed on a board case 30 and a fixed terminal member 33 connected to electric wiring is connected to the holder 32. An intermediate terminal member 34 is slidably fit into the fixed terminal member 33, which is provided with position control portions 36A, 36B, 37. A movable terminal member 35 is slidably fit into the intermediate terminal member 34, which is provided with position control portions 38A, 38B, 39. A fixed cover 41 surrounding the fixed terminal member 33 is fixed on the holder 32. An intermediate cover 42 surrounding the intermediate terminal member 34 is slidably fit into the fixed cover 41, which is provided with position control portions 44A, 44B, 45. A movable cover 43 is slidably fit into the intermediate cover 42, which is provided with position control portions 46A, 46B, 47. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a motor with a reduction gear, and for example, relates to a motor effectively used for a wiper motor of an automobile wiper device.

In recent automobile wiper devices, electrical connection between a wire harness that supplies power from a power source or an electrical signal from a wiper switch to a wiper motor and electrical wiring of a receiving unit such as a power demand unit on the wiper motor side or an auto stop switch As a means, a connection device that can complete a connection operation with one touch is widely used.
A wiper motor side connection portion (hereinafter referred to as a connector) in this type of conventional connection device is integrally assembled with a wiper motor housing. For example, see Patent Document 1.

JP 2006-199193 A

  However, in the case of a wiper motor in which the connector is integrally assembled with the housing, when the wiper motor is attached to the vehicle side, workability is poor if the connector length is short, and in order to change the connector length specification. However, since it is necessary to redesign the housing specifications, there is a problem that not only the cost is greatly increased, but also the number of models and parts are increased.

  An object of the present invention is to provide a motor with a speed reducer that can easily change the length of a connector.

Typical means for solving the above-described problems are as follows.
(1) A motor with a speed reducer in which a connector for electrically connecting a control board and an external power source is provided in a housing,
The connector includes a holder fixed to the housing;
A fixed terminal member held by the holder and electrically connected to the control board;
A movable terminal member slidably supported by the fixed terminal member;
A position restricting portion for restricting the position of the fixed terminal member and the movable terminal member;
A motor with a speed reducer.
(2) The motor with a reduction gear according to (1), wherein the position restricting portion is a concave portion and a convex portion respectively provided in the movable terminal member and the fixed terminal member.
(3) Intermediate terminal members are slidably provided between the fixed terminal member and the movable terminal member, respectively, between the intermediate terminal member and the fixed terminal member, and between the intermediate terminal member and the movable terminal member. (1) The motor with a speed reducer according to (2), wherein a position restricting portion is provided between the terminal members.
(4) a fixed cover provided outside the fixed terminal member and fixed to the holder;
A movable cover provided outside the movable terminal member and slidably fitted to the fixed cover;
A position restricting portion for restricting the position of the fixed cover and the movable cover;
(1) The motor with a speed reducer according to (2).
(5) a fixed cover provided outside the fixed terminal member and fixed to the holder;
A movable cover provided outside the movable terminal member and slidably fitted to the fixed cover;
A position restricting portion for restricting the position of the fixed cover and the movable cover,
An intermediate cover that surrounds the intermediate terminal member is slidably fitted between the fixed cover and the movable cover, and between the intermediate cover and the fixed cover and between the intermediate cover and the movable cover. The motor with a speed reducer according to (3), wherein each is provided with a position restricting portion.

  According to this motor with a speed reducer, the length of the connector can be easily changed.

It is a perspective view which shows the wiper motor which is one embodiment of this invention. It is sectional drawing which follows the II-II line | wire of FIG. 1 which shows a connector. It is sectional drawing equivalent to FIG. 2 which shows the expansion | extension state of a connector. It is a perspective view which shows the expansion | extension state of a fixed terminal member, an intermediate | middle terminal member, and a movable terminal member. It is a bottom view of a connector.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

In the present embodiment, the motor with a reduction gear according to the present invention is configured as a wiper motor used in a rear wiper device.
As shown in FIG. 1, the wiper motor 1 includes a motor unit 10 having an electric motor 11 and a gear unit 20 having a worm gear reduction device (not shown) as a reduction device. And the gear portion 20 are connected side by side.
The motor unit 10 includes a motor housing 12, and the gear unit 20 includes a gear housing 21. The motor housing 12 and the gear housing 21 are arranged next to each other and fastened by bolts (not shown). The motor housing 12 and the gear housing 21 constitute the housing 2 of the wiper motor 1.

The gear housing 21 includes a gear case 22 and a gear cover 23.
The gear case 22 is integrally formed into a storage container shape having one end opened by an aluminum die casting method using aluminum. A gear cover 23 is placed over the opening of the gear case 22 so as to cover an internal worm gear reduction device and a crank device (not shown), and is fastened by bolts.
As shown in FIG. 1, the gear cover 23 is formed into a flat plate shape that is substantially T-shaped in a plan view by press working using an iron plate. The mounting holes 24, 25, and 26 are opened at three tip portions of the gear cover 23. Although not shown, mount rubbers for absorbing vibration are attached to the attachment holes 24, 25, and 26, respectively.
Note that one end portion of the wiper shaft 27 penetrates the blocking wall of the gear case 22 and protrudes to the outside, and the protruding end portion of the wiper shaft 27 fixedly supports the base end portion of the wiper arm (not shown). It is configured as follows. A wiper blade for wiping the rear windshield glass is attached to the free end of the wiper arm.

A board case 30 containing a wiring board and a control board (not shown) is arranged and fixed to the gear case 22 on a substantially extended line of the electric motor 11. The substrate case 30 is made of an insulating resin and is molded into a box shape that can accommodate a wiring board and a control board.
Since the substrate case 30 is fixed to the gear case 22, it constitutes a part of the housing 2 of the wiper motor 1.

  A connector 31 is integrally assembled to a substrate case 30 which is a part of the housing 2 of the wiper motor 1. That is, the connector 31 is arranged on a substantially extended line of the electric motor 11 on one surface (hereinafter referred to as a lower surface) opposite to the wiper shaft 27 of the substrate case 30 and protrudes in a direction perpendicular to the lower surface (vertically downward). ing.

As shown in FIGS. 2 and 3, the connector 31 includes a holder 32. The holder 32 is integrally molded using an insulating resin, and is fixed to the lower end surface of the substrate case 30.
A plurality of fixed terminal members 33 (four in the present embodiment), insert-molded, are fixed to the holder 32. That is, the four fixed terminal members 33 are respectively implanted in the holder 32 so as to be inserted in the vertical direction at the four corners of the rectangle. Each fixed terminal member 33 is formed in a rectangular cylindrical shape using a conductive leaf spring material, and the end of each fixed terminal member 33 in the substrate case 30 is a wiring board in the substrate case 30 or the like. Each is electrically connected to electrical wiring (not shown) laid on the control board.

As shown in FIGS. 2 to 4, each intermediate terminal member 34 is slidably fitted in each fixed terminal member 33. The intermediate terminal member 34 is formed in a rectangular cylindrical shape by using a conductive leaf spring material. The outer diameter of the intermediate terminal member 34 is set equal to the inner diameter of the fixed terminal member 33, and the inner diameter of the intermediate terminal member 34 is set equal to the outer diameter of the movable terminal member 35.
Each movable terminal member 35 is slidably fitted in each intermediate terminal member 34. The movable terminal member 35 is formed in a rectangular flat plate shape using a conductive leaf spring material. The outer diameter of the movable terminal member 35 is set equal to the inner diameter of the intermediate terminal member 34.
That is, the fixed terminal member 33, the intermediate terminal member 34, and the movable terminal member 35 are configured to be telescopic (telescope) structures.

Between the fixed terminal member 33 and the intermediate terminal member 34, a concave portion, an engaging hole and an engaging claw as a convex portion are formed, which are engaged with each other to form a position restricting portion. That is, the proximal end engagement hole 36 </ b> A and the distal end engagement hole 36 </ b> B are respectively opened in the orthogonal direction at the proximal end (upper end) and the distal end (lower end) of the fixed terminal member 33. At the base end portion (upper end portion) of the terminal member 34, an engaging claw 37 that engages with the engaging holes 36A and 36B is provided so as to project in a direction orthogonal to the terminal member 34.
Also between the intermediate terminal member 34 and the movable terminal member 35, a recess, an engagement hole and an engagement claw are formed as a convex portion by engaging with each other. In other words, the base end portion (upper end portion) and the tip end portion (lower end portion) of the intermediate terminal member 34 are respectively provided with base end side engagement holes 38A and front end side engagement holes 38B in directions orthogonal to each other, and are movable. At the base end portion (upper end portion) of the terminal member 35, an engagement claw 39 that engages with the engagement holes 38A and 38B is projected in a direction orthogonal to the terminal member 35.

On the lower surface of the holder 32, a rectangular cylindrical fixed cover 41 is provided at a right angle. The fixed cover 41 is formed so as to surround the outside of the four fixed terminal members 33. A quadrangular cylindrical intermediate cover 42 is disposed outside the four intermediate terminal members 34, and the intermediate cover 42 is slidably fitted into the fixed cover 41. A quadrangular cylindrical movable cover 43 is provided outside the four movable terminal members 35, and the movable cover 43 is slidably fitted into the intermediate cover 42.
That is, the fixed cover 41, the intermediate cover 42, and the movable cover 43 are configured to be telescopic telescopic structures.

Between the fixed cover 41 and the intermediate cover 42, a concave portion and a convex portion that are engaged with each other to form a position restricting portion are formed. That is, a pair of base end side recesses 44A and tip end side recesses 44B are respectively provided in the base end portion (upper end portion) and the tip end portion (lower end portion) of the pair of side wall inner surfaces of the fixed cover 41. A pair of convex portions 45, 45 that respectively engage with the concave portions 44 </ b> A, 44 </ b> B project from the base end portions (upper end portions) on the outer surfaces of the pair of side walls 42.
Between the intermediate cover 42 and the movable cover 43, a concave portion and a convex portion that are engaged with each other to form a position restricting portion are formed. That is, a pair of base end side recesses 46A and tip end side recesses 46B are respectively provided in the base end part (upper end part) and the tip end part (lower end part) of the pair of side walls of the intermediate cover 42. A pair of convex portions 47 and 47 that respectively engage with the concave portions 46 </ b> A and 46 </ b> B project from the proximal end portions (upper end portions) on the outer surfaces of the pair of side walls 42.

The movable cover 43 is configured to fit the fitting portion 51 of the mating connector (see FIGS. 2 and 3) 50, and the movable terminal member 35 can fit into the female terminal member 52 of the mating connector 50. It is configured as follows.
Here, the mating connector is a connector installed at one end of a wire harness that supplies power from the external power source on the vehicle side or an electric signal from the wiper switch to the wiper motor, and together with the connector 31, An electrical connection means that electrically connects the power from the external power supply and the electrical signal from the wiper switch to the power demand section of the wiper motor and the receiving section such as an auto stop switch, and the connection can be completed with one touch. Configure the device.

In the wiper motor configured as described above, the movable terminal member 35 and the movable cover 43 of the connector 31 are configured to be extendable and restrictable with respect to the fixed terminal member 33 and the fixed cover 41. It is possible to easily change the distance between the movable terminal member 35 and the movable cover 43, which are 50 connecting portions, with respect to the wiper motor 1.
For example, when the mating connector 50 does not reach the connector 31 because the length of the wire harness is insufficient, the movable terminal member 35, the movable cover 43, and the intermediate terminal member 34 are shown in FIG. By pulling out the intermediate cover 42 from the fixed terminal member 33 and the fixed cover 41, the mating connector 50 can be connected to the connector 31.
FIG. 3 shows a state where the connector 31 is most extended, and FIG. 2 shows a state where the connector 31 is shortened most.
Although not shown, the connector 31 according to the present embodiment further includes a state in which the movable terminal member 35 and the movable cover 43 are drawn from the intermediate terminal member 34 and the intermediate cover 42, and the intermediate terminal member 34 and the intermediate cover 42 are fixed terminal members. 33 and the state pulled out from the fixed cover 41 can be selected.

  Needless to say, the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention.

  The connector is not limited to being disposed on the board case, but may be disposed on another portion of the wiper motor housing such as a gear housing or a motor housing.

  The fixed terminal member and the movable terminal member are not limited to four, but may be one to three or five or more.

The arrangement of the concave portion and the convex portion of the position restricting portion can be changed as necessary.
Further, the position restricting portion is not limited to a combination of the concave portion and the convex portion.

  The cover may be omitted.

  In the embodiment, the fixed terminal member is insert-molded and fixed to the holder. However, the present invention is not limited to this, and various fixing methods such as a press-fitting type can be applied.

  In the above-described embodiment, the wiper motor for the rear wiper device has been described. However, the present invention is not limited to this, and is applicable to a front wiper device, and further to a motor with a reduction gear used for a power window device, a power seat device, and the like. can do.

1 ... wiper motor, 2 ... wiper motor housing,
DESCRIPTION OF SYMBOLS 10 ... Motor part, 11 ... Electric motor, 12 ... Motor housing,
DESCRIPTION OF SYMBOLS 20 ... Gear part, 21 ... Gear housing, 22 ... Gear case, 23 ... Gear cover, 24, 25, 26 ... Mounting hole, 27 ... Wiper shaft,
30 ... Board case,
DESCRIPTION OF SYMBOLS 31 ... Connector, 32 ... Holder, 33 ... Fixed terminal member, 34 ... Intermediate terminal member, 35 ... Movable terminal member, 36A ... Base end side engagement hole, 36B ... Tip side engagement hole, 37 ... Engagement claw, 38A ... proximal end side engagement hole, 38B ... distal end side engagement hole, 39 ... engagement claw,
41 ... fixed cover, 42 ... intermediate cover, 43 ... movable cover, 44A ... proximal recess, 44B ... protrusion recess, 45 ... protrusion, 46A ... protrusion recess, 46B ... protrusion recess, 47 ... protrusion 50 ... Mating connector, 51 ... Fitting part, 52 ... Female terminal member.

Claims (5)

A motor with a speed reducer provided in a housing with a connector for electrically connecting a control board and an external power source,
The connector includes a holder fixed to the housing;
A fixed terminal member held by the holder and electrically connected to the control board;
A movable terminal member slidably supported by the fixed terminal member;
A position restricting portion for restricting the position of the fixed terminal member and the movable terminal member;
A motor with a speed reducer.   The motor with a speed reducer according to claim 1, wherein the position restricting portion is a concave portion and a convex portion provided in the movable terminal member and the fixed terminal member, respectively.   Intermediate terminal members are slidably provided between the fixed terminal member and the movable terminal member, respectively, between the intermediate terminal member and the fixed terminal member, and between the intermediate terminal member and the movable terminal member. The motor with a speed reducer according to claim 1, wherein a position restricting portion is provided respectively. A fixed cover provided outside the fixed terminal member and fixed to the holder;
A movable cover provided outside the movable terminal member and slidably fitted to the fixed cover;
A position restricting portion for restricting the position of the fixed cover and the movable cover;
The motor with a speed reducer according to claim 1, wherein the motor with a speed reducer is provided. A fixed cover provided outside the fixed terminal member and fixed to the holder;
A movable cover provided outside the movable terminal member and slidably fitted to the fixed cover;
A position restricting portion for restricting the position of the fixed cover and the movable cover,
An intermediate cover that surrounds the intermediate terminal member is slidably fitted between the fixed cover and the movable cover, and between the intermediate cover and the fixed cover and between the intermediate cover and the movable cover. The motor with a speed reducer according to claim 3, wherein the motor is provided with a position restricting portion.

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