JP2011234464A - Motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a motor having a configuration capable of improving material yield of a connection member.SOLUTION: Using connection wires 27a to 27c obtained by cutting wire material of a single conductive metal wire, capable of holding a bent shape, to a predetermined length as connection members connecting connector pins 26a to 26e, which are external connection terminals, motor connection terminals 25a, 25b and fixed contact terminals 24a to 24c, which are internal connection terminals, electrical connections are made between those predetermined terminals.

Description

  The present invention relates to a motor with a built-in rotation detection device that detects the rotational position of a target member such as an output shaft and supplies power in accordance with the rotational position.

  A wiper motor or the like used in a vehicle wiper device is configured by integrally assembling a motor main body and a speed reduction unit that decelerates and outputs rotation generated in the motor main body, and a rotational position of an output shaft in the speed reduction unit, that is, a wiper. A rotation detection device for detecting the position of is incorporated. When the wiper switch is operated to the OFF side during wiper wiping operation, the wiper motor rotates the wiper in the middle of wiping to a predetermined stop position and stops the rotation position of the output shaft with the built-in rotation detection device. Is detected (see, for example, Patent Document 1).

Japanese Patent No. 3645542

  By the way, the rotation detection device includes a connector part for external connection provided in the speed reduction part, a contact member that is in sliding contact with a predetermined conductor pattern forming surface of the rotary plate that rotates integrally with the output shaft, and a power supply terminal that supplies power to the motor body. A plurality of terminals are used to connect between predetermined parts. The terminal is formed by punching from a conductive metal plate in accordance with each shape.

  However, since the terminals connecting the parts have various shapes and are complicated, the shapes of punching from the conductive metal plate are also complicated and different one by one. Therefore, a lot of useless blanks (waste materials) are generated in the metal plate at the time of punching the terminal, and there is room for improving the material yield of the connection member for electrical connection.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a motor having a configuration capable of improving the material yield of the connecting member.

  In order to solve the above problems, the invention described in claim 1 has an external connection terminal to which power is supplied from the outside and an internal connection terminal for supplying the power to the motor body, and connects between predetermined terminals. A motor with a built-in rotation detection device that is electrically connected through a member and changes a power supply mode by switching a connection path between the external and internal connection terminals in accordance with a rotation position of the target member. Is a connection wire cut to a predetermined length from a wire material made of a single conductive metal wire capable of maintaining a bent shape, and the connection wire is designed to achieve electrical connection between the predetermined terminals. Is the gist.

  In this invention, a connecting wire obtained by cutting a wire material of a single conductive metal wire capable of maintaining a bent shape into a predetermined length is used as a connecting member for connecting the external connecting terminal and the internal connecting terminal. Are electrically connected. In other words, the connection wire, which is a wire, can be bent and cut with a corresponding length even if a complicated bent shape is required at the time of wiring, and there is no waste of material (waste material). Is significantly improved.

  According to a second aspect of the present invention, in the motor according to the first aspect, the connection wire has one or more bent portions, and is bent in a predetermined shape in advance or wired while being bent. This is the gist.

  In the present invention, the connection wire has one or more bent portions, and is bent and formed in advance in a predetermined shape, or is wired while being bent. In other words, it is possible to select whether the connecting wire is bent before wiring or bent during wiring, and the degree of freedom of assembly is high.

  According to a third aspect of the present invention, in the motor according to the second aspect, the base member of the rotation detecting device has a support column at a bent inner portion of the connection wire, and the connection wire is supported by the support column. This is the gist.

  According to the present invention, the base member of the rotation detecting device is provided with the support column on the bent inner side portion of the connection wire, and the connection wire is supported by the support column. Thereby, a connection wire will be in the stable assembly | attachment state. Further, in the case where the connection wire is bent while being bent on the base member, the support column also functions as a fulcrum of the bending, and the workability can be facilitated.

  According to a fourth aspect of the present invention, in the motor according to the second or third aspect, a plurality of the connection wires are provided, and the wirings are respectively arranged at different heights due to a step provided on the base member of the rotation detecting device. The gist of this is

  In the present invention, when a plurality of connection wires are provided, they are wired at different heights due to the steps provided on the base member of the rotation detection device. Thereby, since a space | interval can be set also in the height direction between adjacent connection wires, and the space | interval of a parallel arrangement direction can be set small, size reduction to a parallel arrangement direction is attained. Further, when wiring the connection wire while bending it on the base member, it is possible to contribute to the reduction of mutual interference during wiring by changing the wiring height of the connection wire.

The gist of the fifth aspect of the present invention is that the motor according to any one of the first to fourth aspects is used for a vehicle wiper device.
According to the present invention, the material yield of the motor components used in the vehicle wiper device can be improved.

  ADVANTAGE OF THE INVENTION According to this invention, the motor made into the structure which can improve the material yield of a connection member can be provided.

It is a block diagram of the wiper motor of this embodiment. It is a block diagram of a gear housing. It is a block diagram of the rotation detection apparatus with which the cover member was mounted | worn. It is a block diagram of the rotation detection apparatus connected with the connection wire. It is a block diagram of the rotation detection apparatus before the connection by a connection wire. It is an electrical block diagram of the wiper apparatus for vehicles.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, an embodiment of the invention will be described with reference to the drawings.
As shown in FIG. 1, a wiper motor 1 used in a vehicle wiper device includes a motor body 2 and a speed reduction unit 3. The motor body 2 includes a substantially bottomed cylindrical yoke housing 4, a plurality of magnets 5 fixed to the inner peripheral surface of the yoke housing 4, and a rotating armature 6 accommodated in the yoke housing 4. ing. The rotary armature 6 has a rotary shaft 7, and a worm 8 is formed on the distal end side of the rotary shaft 7 protruding from the opening of the yoke housing 4.

  The speed reduction unit 3 includes a gear housing 11, a worm wheel 12, a cover member 13, and a rotation detection device 20. The gear housing 11 is formed with a wheel receiving recess 11b communicating with the worm receiving recess 11a (see FIG. 2). The worm 8 received in the worm receiving recess 11a and received in the wheel receiving recess 11b. The rotation generated in the motor main body 2 is decelerated by meshing with the worm wheel 12 to be engaged. The output shaft 14 connected to the worm wheel 12 so as to rotate integrally is projected to the outside through a through hole 11c formed in the center of the gear housing 11 and connected to a link mechanism (not shown) for wiping the wiper. .

  The cover member 13 is made of an electrically insulating resin material and is mounted so as to close the opening of the gear housing 11 (the worm accommodating recess 11a and the wheel accommodating recess 11b) as shown in FIG. The cover member 13 has a unit housing recess 13 a formed on the inner side surface (the surface facing the worm wheel 12), and a connector housing portion 13 b extending from the opposite side of the motor body 2. A rotation detecting device 20 is accommodated in the unit accommodating recess 13a, and connector pins 26a to 26e described later provided in the rotation detecting device 20 are inserted into the connector housing portion 13b.

  As shown in FIGS. 3 and 4, the rotation detection device 20 includes a base plate 21 made of an electrically insulating resin material. A disc-shaped rotating plate 22 is rotatably mounted on and supported on the base plate 21, and the rotating plate 22 is disposed coaxially with the worm wheel 12. The rotating plate 22 is connected to the worm wheel 12 in a rotating direction by a connecting convex portion 22a provided on one side of the rotating plate 22, that is, on the surface opposite to the base plate 21 on the worm wheel 12 side. Along with this, it rotates together.

  A movable contact 23 formed in a predetermined pattern shape with a conductive metal plate is fixed to the other side of the rotating plate 22, that is, the surface on the base plate 21 side. On the other hand, three fixed contact terminals 24 a to 24 c are fixed to the base plate 21. The fixed contact terminals 24 a to 24 c have their base end portions fixed to the surface of the base plate 21 on the rotating plate 22 side with a predetermined interval, and the respective distal end portions are arranged radially on the surface of the rotating plate 22 on the movable contact 23 side. To make contact.

  That is, as the rotating plate 22 that rotates together with the worm wheel 12 rotates, the fixed contact terminals 24a to 24c are slidably contacted on the movable contact 23, and the slidable movable contact 23 has a predetermined shape. The combination of conduction of the fixed contact terminals 24a to 24c through the movable contact 23 is changed for each predetermined rotational position. And the rotation position of the rotating plate 22, that is, the rotation position of the output shaft 14 through the rotating plate 22 and the worm wheel 12 is detected by electrically detecting the combination of conduction of the fixed contact terminals 24a to 24c. It is the composition which becomes. Here, as will be described later, the movable contact 23 electrically switches the combination of conduction of the fixed contact terminals 24a to 24c in accordance with the rotational position of the rotary plate 22, thereby switching according to the rotational position of the rotary plate 22. Is possible.

  A pair of motor connection terminals 25a and 25b are fixed to a predetermined location on the motor body 2 side on the surface of the base plate 21 on the rotating plate 22 side, and five connector pins 26a to 26e are provided at predetermined locations on the connector housing portion 13b side. It is fixed. The motor connection terminals 25a and 25b, the connector pins 26a to 26e, and the fixed contact terminals 24a to 24c are connected to each other through a predetermined number of connection wires 27a to 27c. Connections to the connection wires 27a to 27c are made by soldering.

  Specifically, as shown in FIGS. 4 and 6, the connector pins 26a to 26d are terminals connected to the wiper switch 30 provided in the vehicle driver's seat, and the connector pin 26e is a ground terminal. The connector pin 26a is connected to one end of the connection wire 27a, and the other end of the connection wire 27a is connected to the motor connection terminal 25a. The motor connection terminal 25a is connected to the high-speed power supply brush of the motor body 2 (see FIG. 6). The connector pin 26b is connected to one end of the connection wire 27b, and the other end of the connection wire 27b is connected to the motor connection terminal 25b. The motor connection terminal 25b is connected to the low-speed power supply brush of the motor body 2 via the choke coil L1 (see FIG. 6).

  The connector pin 26c is connected to the center fixed contact terminal 24b in the radial direction of the rotary plate 22, and the connector pin 26d is connected to the inner peripheral side fixed contact terminal 24c. The outer peripheral fixed contact terminal 24a is connected to an intermediate portion of the connection wire 27c, and is connected to a connector pin 26e made of a ground terminal at the other portion of the connection wire 27c.

  One end of the connection wire 27c is connected to a ground terminal 28a that is fastened together with the gear housing 11, and the other end of the connection wire 27c is connected to one of the dustproof capacitors C1 and C2. It is connected to a connection terminal 28b for connection with the terminal. Connection terminals 28c and 28d for connecting to the other terminals of the dustproof capacitors C1 and C2 are connected to intermediate portions of the connection wires 27a and 27b, respectively. The connection terminals 28b to 28d are arranged and connected before or after the connection wires 27a to 27c are installed. The dust-proof capacitors C1 and C2 are installed in the element receiving recesses 21a and 21b of the base plate 21.

  Each of the connection wires 27a to 27c is bent at a predetermined angle at an intermediate portion, and in this embodiment, the support plate 21c is provided on the base plate 21 at the bent portion of the two long connection wires 27a and 27b. It is erected. The support column 21c is provided at each of two bent inner portions of the connection wires 27a and 27b, and functions as a support portion for the connection wires 27a and 27b. Each of the connection wires 27 a to 27 c is formed by cutting the wire material W shown in FIG. 5 into a predetermined length and wiring the wire bent in advance at a predetermined portion, or wiring the wire material W while bending it on the base plate 21. In the case of the mode, the column 21c also functions as a fulcrum of bending.

  The base plate 21 is provided with a step 21d. A connection wire 27a is wired to a portion 21e lower than the step 21d, and connection wires 27b and 27c are wired to a high portion 21f. Particularly in the case of wiring while bending the wire material W on the base plate 21, it is possible to reduce mutual interference during wiring by changing the wiring height of the connection wires 27a to 27c.

Incidentally, the wire material W is made of a single conductive metal wire whose outer peripheral surface is insulated and can hold a bent shape, and for example, the same material as the winding of the rotary armature 6 may be used.
Such a rotation detection device 20 is attached to the cover member 13, and the cover member 13 to which the rotation detection device 20 is attached is attached so as to close the opening of the gear housing 11. At the time of mounting, the worm wheel 12 and the rotation plate 22 of the rotation detection device 20 are coupled so as to be integrally rotatable, and motor terminals connected to the low-speed and high-speed power supply brushes of the brush holder device (not shown), respectively. Motor connection terminals 25a and 25b are connected to (not shown), respectively.

  In the wiper motor 1 configured as described above, the connector pins 26a to 26d are connected to the wiper switch 30, and the connector pin 26e is connected to the ground. The connector pin 26d is connected to the plus terminal of the on-vehicle battery power source E.

  The wiper switch 30 has a stop position P1 for stopping the wiper motor 1 to stop the wiper, a low speed operation position P2 for operating the motor 1 at a low speed to wipe the wiper at a low speed, and a wiper for wiping the wiper at a high speed. And a high-speed operation position P3 for operating the motor 1 at high speed. In the state in which the wiper switch 30 is switched to the stop position P1, power is not supplied from the battery power source E to the connector pins 26a and 26b connected to the low-speed and high-speed power supply brushes of the motor body 2.

  When the wiper switch 30 is switched to the low speed operation position P2, the power is supplied from the battery power source E to the low speed power supply brush of the motor body 2 via the connector pin 26b, and the motor 1, that is, the wiper operates at low speed. Accordingly, the rotation plate 22 rotates in the rotation detection device 20, and the fixed contact terminal 24b is switched from the connection of the fixed contact terminal 24a to the connection to the fixed contact terminal 24c via the movable contact 23. Thus, even when the wiper switch 30 is switched to the stop position P1 while the wiper is being wiped, a power supply path to the low-speed power supply brush via the rotation detection device 20 is secured, and the operation of the motor 1, that is, the wiper is performed. Will continue. When the wiper operates to a predetermined stop position along the lower end of the front window, the rotation detection device 20 switches the connection of the fixed contact terminal 24b through the movable contact 23 to the fixed contact terminal 24a side, and the operation of the motor 1 is performed. It stops automatically.

  When the wiper switch 30 is switched to the high-speed operation position P3, power is supplied from the battery power source E to the high-speed power supply brush of the motor body 2 through the connector pin 26a, and the motor 1, that is, the wiper operates at high speed. Similarly, even when the wiper is operating at high speed, even if the wiper switch 30 is switched to the stop position P1 while the wiper is being wiped, the rotation detection device 20 operates to move the wiper to the stop position. When the power supply is continued and the wiper operates to the stop position, the operation of the motor 1 is automatically stopped.

Next, characteristic effects of the present embodiment will be described.
(1) Single-wire conductivity capable of maintaining a bent shape as a connection member for connecting the connector pins 26a to 26e which are external connection terminals and the motor connection terminals 25a and 25b and the fixed contact terminals 24a to 24c which are internal connection terminals Connection wires 27a to 27c obtained by cutting a metal wire material W into a predetermined length are used, and electrical connection between the predetermined terminals is achieved. In other words, the connection wires 27a to 27c, which are wire rods, need only be cut and bent at a length corresponding to a complicated bent shape at the time of wiring, and no unnecessary material margin (waste material) is generated. The material yield of the component parts of the wiper motor 1 can be improved.

  (2) Each of the connection wires 27a to 27c has one or more bent portions, and is bent in a predetermined shape in advance and wired while being bent. That is, it is possible to select whether the connection wires 27a to 27c are bent before wiring or bent during wiring, and the degree of freedom of assembly is high.

  (3) The base plate 21 of the rotation detection device 20 is provided with a column 21c on the inner side of the long side connection wires 27a and 27b, and the connection wires 27a and 27b are supported by the column 21c. As a result, the connection wires 27 a and 27 b can be stably assembled to the base plate 21. Further, in the case where the connection wires 27a and 27b are wired while being bent on the base plate 21, the support column 21c also functions as a fulcrum of the bending, and the workability can be facilitated. In addition, when forming a slit-shaped holding portion on the support column 21c and wiring the connection wires 27a and 27b while bending them on the base plate 21, the connection wires 27a and 27b are inserted into the slits and held by the holding portion. It can also be operated while being held.

  (4) The connection wires 27 a and 27 b are wired with different heights due to the step 21 d provided on the base plate 21 of the rotation detection device 20. Thereby, since a space | interval can be set also in the height direction between the adjacent connection wires 27a and 27b and the space | interval of a parallel arrangement direction can be set small, it can contribute to size reduction to a parallel arrangement direction. Further, when wiring the connection wires 27a and 27b while bending them on the base plate 21, it is possible to contribute to the reduction of mutual interference during wiring by making the wiring heights of the connection wires 27a and 27b different.

(5) By using what is used for the winding of the rotary armature 6 for the wire material W (connection wires 27a to 27c), the parts can be shared and the number of parts can be reduced.
In addition, you may change embodiment of this invention as follows.

  In the above embodiment, the support wires 21a and 27b are provided with the support posts 21c on the bent inner portions, and the positions, the number, the shape, and the like of the support posts 21c may be appropriately changed. It may be omitted. Moreover, you may change suitably the wiring aspect of the connection wires 27a-27c.

-You may use wire materials other than the winding of the rotary armature 6 for the connection wires 27a-27c (wire material W) of the said embodiment.
In the above embodiment, the present invention is applied to the wiper motor 1. However, the present invention may be applied to a motor used for other purposes, for example, a power window motor that drives a vehicle window regulator, a sunroof motor that drives a sunroof, and the like.

  DESCRIPTION OF SYMBOLS 1 ... Wiper motor (motor), 2 ... Motor main body, 14 ... Output shaft (target member), 20 ... Rotation detection apparatus, 21 ... Base plate (base member), 21c ... Column, 21d ... Step, 25a, 25b ... Motor connection terminal (Internal connection terminals), 24a to 24c ... fixed contact terminals (internal connection terminals), 26a to 26e ... connector pins (external connection terminals), 27a to 27c ... connection wires, W ... wire materials.

Claims (5)

It has an external connection terminal to which power is supplied from the outside and an internal connection terminal for supplying the power to the motor body side, and electrically connects predetermined terminals via a connection member, depending on the rotational position of the target member A rotation detection device built-in motor that changes the power supply mode by switching the connection path between the external and internal connection terminals,
The connection member is a connection wire cut to a predetermined length from a wire material made of a single conductive metal wire capable of maintaining a bent shape, and the connection wire is used for electrical connection between the predetermined terminals. A motor characterized by that. The motor according to claim 1,
The motor is characterized in that the connection wire has one or more bent portions, and is formed by bending in advance into a predetermined shape or wiring while being bent. The motor according to claim 2,
The motor according to claim 1, wherein a base member of the rotation detecting device has a support on the bent inner side portion of the connection wire, and the connection wire is supported by the support. The motor according to claim 2 or 3,
A plurality of the connecting wires are provided, and the motors are respectively wired at different heights due to a step provided on a base member of the rotation detecting device. The motor according to any one of claims 1 to 4,
A motor used for a wiper device for a vehicle.

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