JP3182340B2 - Drive - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive device applied to, for example, a power window device for opening and closing a window glass of a vehicle door.

[0002]

2. Description of the Related Art For example, in a power window device for moving a window glass of a vehicle up and down, a driving force of a motor is reduced by a plurality of gears and a reduced driving force is outputted from an output shaft connected to the gears. The apparatus is applied, and the window glass is moved up and down by the driving force output from the output shaft.

[0003] Some of such power window devices have a so-called anti-jamming function for preventing an occupant's body or foreign matter from being unnecessarily jammed in the window glass. In a power window device having this kind of pinching prevention function, a limit switch is arranged at a predetermined position of a door, and based on a signal from the limit switch and a motor lock current, whether or not a foreign object has been pinched in the window glass. And a configuration that controls the movement of the window glass, that is, the rotational position of the motor, or the provision of a Hall IC or a special commutator, detects the rotational speed of the armature and detects the rotational speed detection signal (the number of pulses of the pulse signal or the like). There is a configuration in which it is determined based on the pulse width) whether or not the motor is caught and the rotational position of the motor is controlled.

However, in such a power window device (motor rotation position detecting mechanism), when assembling a motor or a window regulator, complicated adjustment of an assembling position and complicated resetting after assembling are indispensable. In addition, when the anti-jamming mechanism is configured, other parts such as the control device have the disadvantages of high cost and poor accuracy.

[0005] Here, a position detecting device for a moving body capable of solving such a drawback has already been proposed by the present applicant, and an example of a motor (drive device) to which the position detecting device for the moving body is applied. It is disclosed in JP-A-8-29114.

That is, the motor (driving device) disclosed in the above publication has a motor unit, a gear for reducing the driving force (rotational force) of the motor unit, and an output shaft for outputting the reduced driving force to the outside. And a gear unit, and a position detecting device for the moving body is integrally attached to the motor. The position detecting device of the moving body includes a planetary gear set including a ring gear rotatably held on a cover plate of the device and a planetary gear meshing with the ring gear,
A switch unit including a moving contact provided integrally with the ring gear of the planetary gear set and rotating together with the ring gear, and a pair of fixed contacts fixed to the cover plate and capable of contacting the moving contact, and further from the motor output shaft (moving body) to the ring gear. And a clutch mechanism for interrupting the transmission of the rotational force in the positive direction. Therefore, when the position detection device and the motor of the moving body are used in a power window device, the position of the window glass can be detected with high accuracy, and not only can the movement be controlled, but also The initial position can be set without complicated adjustment, and this can be realized at a low cost with a simple structure.

[0007]

By the way, in a motor to which the above-described position detecting device for a moving body is applied, the position detecting device is provided with an electric contact, such as a moving contact or a fixed contact, which conducts when contacted. If foreign matters such as water droplets adhere to these moving contacts or fixed contacts, malfunction of the apparatus may occur. For this reason, the above-described ring gear, planetary gear set and the like, including the switch section composed of the moving contact and the fixed contact, are sealed by the base plate and the cover plate to prevent water droplets and the like from entering from the outside of the apparatus.

[0008] However, if the position detecting device is sealed, dew condensation occurs inside the device when the outside air temperature fluctuates, and this may cause water droplets to adhere to the movable contact or the fixed contact. Condensation measures were needed.

An object of the present invention is to provide a drive device capable of preventing dew condensation in a control unit such as a position detection device in consideration of the above fact.

[0010]

According to a first aspect of the present invention, there is provided a driving device, wherein a rotating shaft of a motor is connected to an output shaft via a gear.
Outputting the rotational force of the motor from the output shaft,
A driving unit vent is provided for opening the interior to the atmosphere, integrally attached to the front SL driver co Once shielded from the outside, and a control unit for detecting a rotational position of the output shaft The drive unit, wherein each of the drive unit and the control unit
In addition to providing a partition, the partition of the driving unit and the control
Ventilation holes that communicate with each other through the gap between the
Formed on both the partition of the drive unit and the partition of the control unit
Was, it is characterized in that.

In the driving device having the above-described structure, when the motor of the driving section operates and the rotating shaft rotates, the output shaft is rotated via the gear, and the driving force of the motor is output from the output shaft. In this state, the rotation position of the output shaft is always detected by the control unit . Incidentally, in the present driving device, the
Partition walls each having a ventilation hole are provided in both the drive unit and the control unit , and each side is provided with a gap between these partition walls.
The vents on the wall are in communication. Therefore, the outside air taken into the drive unit from the ventilation unit of the drive unit is separated from the partition wall on the drive unit side.
Is taken into the control unit through the vent hole, the gap between the partition walls, and the vent hole of the partition wall on the control unit side, so that the temperature and the atmospheric pressure in the control unit are always the same as the outside air temperature and the outside air pressure. For this reason, dew condensation in the control unit is prevented, and malfunction of the control unit due to dew condensation can be prevented.

Also , a partition in the ventilation section, in the drive section, and on the drive section side.
The outside air is taken into the control unit through the ventilation holes, the gaps between the partition walls, and the ventilation holes of the partition wall on the control unit side, so that foreign substances (for example, water droplets) other than the outside air are prevented from entering the control unit, and the control is performed. It is possible to prevent malfunction of the control unit due to attachment of foreign matter to members in the unit. Moreover, each of these bulkheads
Vent holes provided in different locations are different
For example, apply a substance other than outside air (for example,
From inside the drive unit of the clothed grease) to the control unit, or
Outflow from the control section to the drive section is prevented. For this reason,
The drive unit and control unit can always be kept in a normal state.
You.

The drive unit of claim 2, wherein the axis of rotation of motors is connected to the output shaft through the gears, the rotational force of the motor to output from the output shaft, to open the inside air vent A part is provided , and the ventilation part is
A drive unit having ventilation holes opened at different positions, and a shield formed from the outside while being shielded from the outside ;
Formed in the partition wall of the drive unit at a position separated from the ventilation hole
Vents integrally attached to the driving unit via another bulkhead another vent hole is formed which communicates with a control unit for detecting a rotational position of the output shaft, Ru and Bei Etei.

In the driving device having the above configuration, the motor of the driving unit is
Is activated and the rotating shaft rotates, the output shaft is
The output shaft outputs the driving force of the motor.
You. In this state, the rotation position of the output shaft is
Therefore, it is always detected. By the way, in this drive,
Vent holes are formed in each of the moving part partition and the control part partition.
Outside air taken into the drive from the ventilation section of the drive
Are the ventilation holes of the partition of the drive unit and the ventilation holes of the partition of the control unit.
Is taken into the control unit via the
And the atmospheric pressure are always the same as the ambient temperature and the atmospheric pressure. others
Therefore, dew condensation in the control unit is prevented, and the control unit
Malfunction can be prevented. In addition, the partition of the control unit
Is the formed vent a vent formed in the partition of the drive unit?
These vents are spaced apart from each other.
Is not opposed to the
(For example, water droplets) is prevented from entering the control unit, and
Prevents malfunction of the control unit due to foreign matter adhering to members inside the unit
can do. Moreover, it is formed on the partition of the control unit.
The ventilation holes and the ventilation holes formed in the partition of the drive unit
Because it is not directed to other substances (such as driving
Grease applied to the inside of the unit or the control unit)
Prevents outflow into the control unit or from the control unit to the drive unit
Is done. Therefore, the drive unit and the control unit are always in a normal state.
Can be kept.

[0015]

FIG. 1 is a perspective view of a driving device 10 according to an embodiment of the present invention. FIG.
1 shows a cross-sectional view along line 2-2 in FIG.

As shown in these figures, the driving device 1
Reference numeral 0 denotes a drive unit 11. The drive unit 11 includes the motor 1
1A and a gear portion 11B connected to the motor 11A. The gear portion 11B includes a housing 18 formed of a resin material. Here, FIG. 3 shows a front view of the drive device 10 from the direction of arrow A with the motor 11A removed, and FIG. 4 shows a plan view of the drive device 10 from the back side. Have been. As shown in these figures, a motor 11A is integrally attached to the housing 18 by screws 13, and the rotation shaft 12 of the motor 11A passes through a through hole 24 formed in the housing 18 to thereby allow the housing 18 to rotate. Has been extended inside. A worm gear 14 is formed at the tip of the rotating shaft 12, and the worm gear 14 meshes with a rotating gear wheel 16 disposed in a housing 18.

The rotary gear wheel 16 has a shaft 20 as an output shaft. The shaft 20 is rotatably supported by the housing 18. Therefore, when the motor 11 </ b> A operates to rotate the rotating shaft 12, the rotating force is transmitted to the rotating gear wheel 16 via the worm gear 14, and the shaft 2 is rotated.
0 rotates. The output fitting portion 2 is provided at the tip of the shaft 20.
2 are provided, and can be connected to an external input shaft or the like (not shown).

On the motor 11A side of the housing 18, there is formed a vertical hole 70 constituting a ventilation part. The vertical hole 70 is formed in a substantially cylindrical shape, and
8 is open on the lower surface side. As shown in FIG. 4, a ventilation hole (not shown) bent at a right angle to the opening direction of the vertical hole 70 is formed in the opening of the vertical hole 70, and the ventilation portion is formed together with the vertical hole 70. The constituent cap 71 is fitted.

Further, as shown in FIG. 3, a horizontal hole 72 having a rectangular section is formed on the motor 11A side of the housing 18 to form a ventilation portion. One end of the horizontal hole 72 is open at the bottom of the vertical hole 70, and the other end is
8 is open to the housing portion 18A on the motor 11A side. In addition, the accommodation portion 18A has a space enough to accommodate the brush holder 19 and the like. For this reason, the housing 18
Outside air (hereinafter referred to as “outside air”) of the cap 7
1, can be taken into the housing portion 18A of the housing 18 and the motor 11A through the vertical hole 70 and the horizontal hole 72.

A lateral hole 74 having a rectangular cross section is formed in the housing portion 18A of the housing 18. This horizontal hole 74
Has one end open to the housing portion 18A and the other end
1B. Thus, the motor 11A and the gear portion 11B communicate with each other. Therefore, the outside air taken into the housing portion 18A of the housing 18 through the cap 71, the vertical hole 70, and the horizontal hole 72 is
B.

On the other hand, a cover plate 76 is provided above the housing 18 (that is, on the opposite side of the output fitting portion 22) as a partition that can be fitted to the housing 18. The center of the cover plate 76 has a shaft 20
A through-hole 82 is formed corresponding to. Further, a pair of ventilation holes 84 are formed in the cover plate 76. These ventilation holes 84 are formed at positions separated from the through holes 82 by a predetermined distance so as to face each other via the through holes 82. Above the cover plate 76, a position detection device 30 as a control unit is disposed.
6 are integrally fixed to the cover plate 76.

The position detecting device 30 has a base plate 34 as a partition. The base plate 34 has through holes 38 corresponding to the through holes 82 of the cover plate 76.
Are formed. Further, a pair of ventilation holes 88 are formed in the base plate 34. These vents 88
Are formed at positions separated from the through hole 38 by a predetermined distance so as to face each other via the through hole 38. As shown in FIG. 2, when the position detecting device 30 is attached to the drive unit 11, the communication between the ventilation hole 88 and the cover plate 76 is on the same radial line about the through hole 82 and the through hole 38. Pores 84 are located. Here, since the ventilation hole 88 is formed at a position more distant from the ventilation hole 82 and the ventilation hole 38 than the ventilation hole 84, in this state, the ventilation hole 88 and the ventilation hole 84 do not face each other, and Plate 7
The air hole 88 and the air hole 84 communicate with each other via a slight gap between the base plate 34 and the base plate 34. A sealing material (not shown) is applied to the outer peripheral portion 78 of the joint surface between the cover plate 76 and the base plate 34 to prevent foreign matter (for example, water droplets) from entering the joint surface from the outside. I have.

The position detecting device 30 includes a cover plate 36 that can be fitted to the base plate 34, and is formed into a thin, substantially cylindrical shape by both. An elastic fixed contact 60 having one end fixed to the cover plate 36 is attached to the cover plate 36.

Further, the position detecting device 30 has a connecting shaft 42. One end of the connection shaft 42 is integrally connected to the shaft 20 and always rotates integrally with the shaft 20. On the other hand, the other end side of the connecting shaft 42 is
And protrudes into the position detecting device 30 via the. A sun gear 44 is provided at the other end of the connection shaft 42.

As shown in FIG. 2, a disc-shaped ring gear 46 and a planetary gear 54 rotatably supported by a carrier 56 are accommodated in the position detecting device 30. The planetary gear set is formed by meshing in the state, and the connecting shaft 42 (ie,
The rotation of the shaft 20) can be transmitted at a reduced speed. Further, the outer peripheral portion of the ring gear 46 has a conductive flange portion 4.
8 are formed, and the above-mentioned fixed contacts 60 are in elastic contact with each other. In addition, a non-conductive moving contact corresponding to the fixed contact 60 is formed in a part of the flange portion 48, and the ring gear 46 is in a conductive state of the fixed contact 60 due to rotation, that is, the fixed contact 60 and the flange portion 48. Contact with the moving contact (non-conductive portion) of the
Can be detected.

A pulse plate 192 is housed inside the position detecting device 30. The pulse plate 192 has a thin disk shape, is press-fitted into the connection shaft 42, and rotates integrally with the connection shaft 42. A conductive portion 194 is formed on the periphery of the pulse plate 192. The conductive portion 194 includes a ring-shaped first conductive portion 194A and a second conductive portion 194B formed adjacent to the first conductive portion 194A and having pulse-shaped irregularities continuous.
And is constituted by. A sliding contact 196 whose base is fixed to the cover plate 36 is in contact with the conductive portion 194. The sliding contact 196 is constituted by an input contact 196A and an output contact 196B. The input contact 196A of the sliding contact 196 contacts the first conductive portion 194A, and the sliding contact 196 contacts the second conductive portion 194B. Output contact 196B is in contact. Accordingly, a pulse signal can be detected with the rotation of the pulse plate 192, and the position of the moving body that moves by the driving force of the motor 11A (drive unit 11) is controlled.

Next, the operation of the present embodiment will be described. The drive device 10 having the above configuration is used, for example, as a drive device for a power window device. In this case,
In the drive device 10, the output fitting portion 22 is connected to a drive portion (not shown) of the window regulator, and the fixed contact 60 is electrically connected to a control circuit of the power window device.

When an up switch (not shown) of the power window device is operated, the motor 11A (drive unit 11) is operated to rotate the shaft 20, whereby the window regulator is operated and the window glass (not shown) is operated. Is raised. In this state, whether or not the window glass has reached a predetermined position, that is, whether or not the rotation of the shaft 20 has rotated to a predetermined state, is determined by whether the moving contact of the flange portion 48 and the fixed contact 60 are separated from each other. When the moving contact and the fixed contact 60 come into contact with each other and become non-conductive,
Has reached the predetermined rotational position, that is, it has been determined that the window glass has risen to the predetermined position.

Up to this point, it is determined whether or not the window glass has caught foreign matter based on the change in the pulse signal generated by the conductive portion 194 and the sliding contact 196 as the pulse plate 192 rotates. You. When it is detected that a foreign object has been caught, the drive unit 11 is rotated in the opposite direction, and the window glass is lowered. On the other hand, if no entrapment of foreign matter is detected, the rotation of the motor 11A is continued, and the window glass is further raised.

Further, whether or not the window glass is fully closed is determined based on a pulse signal accompanying the rotation of the pulse plate 192, a lock current of the drive unit 11, and the like. When the window glass is completely closed, the drive unit 11 is stopped.

By the way, in the present driving device 10, the cap 71 attached to the housing 18, the housing 18
Vertical hole 70, horizontal hole 72, horizontal hole 74, cover plate 76
Are formed, and the vent 88 of the base plate 34 is formed, so that the inside of the position detecting device 30 communicates with the outside via the motor 11A and the gear 11B of the drive unit 11. Therefore, outside air is taken into the motor 11A side of the drive unit 11 through the vertical hole 70 and the horizontal hole 72 of the housing 18, and the outside air taken into the motor 11A is
It is taken into the gear portion 11B through the lateral hole 74,
The outside air taken into the gear portion 11 </ b> B
6 and through a slight gap between the cover plate 76 and the base plate 34, and is taken into the position detecting device 30 through the vent 88 of the base plate 34.

Thus, the inside of the position detecting device 30 is always kept at the same temperature and the same atmospheric pressure as the outside. Therefore, dew condensation does not occur inside the position detecting device 30. Therefore, moisture due to dew condensation does not adhere to members such as the fixed contact 60 and the pulse plate 192 where adhesion of water is not preferable, and normal operation is always performed even when there is a change in the outside air temperature or outside air pressure. Can be secured.

In the present driving device 10, the cap 7
1. Although outside air can be taken into the position detection device 30 through the vertical hole 70, the horizontal hole 72, the horizontal hole 74, the ventilation hole 84, and the ventilation hole 88, water droplets enter the position detection device 30 from outside. No foreign matter such as does not enter. That is, in the present driving device 10, the cap 71, the vertical hole 70, the horizontal hole 72, the horizontal hole 74, the ventilation hole 84, and the ventilation hole 8 do not have a configuration in which the outside and the inside of the position detection device 30 directly communicate with each other.
It communicates extremely complicatedly through 8. Therefore, external water droplets and the like do not enter the position detection device 30 following these paths, and only outside air is taken into the position detection device 30.

Further, in the present driving device 10, the ventilation holes 88
Is formed at a position spaced apart from the ventilation hole 84, the ventilation hole 88 and the ventilation hole 84 are intricately communicated via a slight gap between the cover plate 76 and the base plate 34. For this reason, for example, even if grease or the like is applied to one or both of the inside of the housing 18 and the inside of the position detecting device 30, the grease is applied to the ventilation holes 84.
Through the vent hole 88, the outflow from the inside of the housing 18 into the position detecting device 30 or from the inside of the position detecting device 30 into the housing 18 is prevented.

As described above, in the present driving device 10, the cap 71 attached to the housing 18, the vertical hole 70, the horizontal hole 72, the horizontal hole 74 of the housing 18, the ventilation hole 84 of the cover plate 76, and the base plate Since the 34 ventilation holes 88 are provided, the inside of the position detecting device 30 can be kept at the same temperature and pressure as the outside. For this reason, it is possible to prevent dew condensation inside the position detection device 30 due to fluctuations in the outside air temperature and the outside air pressure, and to always ensure normal operation even when the outside air temperature and the outside air pressure fluctuate.

Also, since the outside air circulation path from the outside to the inside of the position detecting device 30 is made extremely complicated by the cap 71 attached to the housing 18 to the vent hole 88 of the base plate 34, the position detecting device 30 Water droplets and the like are prevented from entering the device, and normal operation can be ensured even in rainy weather.

Further, since the position of the ventilation hole 88 and the position of the ventilation hole 84 are shifted relative to each other in the circumferential direction and the radial direction with respect to the through holes 82 and 38, the position from the inside of the housing 18 to the inside of the position detecting device 30. Alternatively, it is possible to prevent a substance such as grease from flowing out of the position detecting device 30 into the housing 18.

In the present embodiment, a pair of ventilation holes 84 are formed in the cover plate 76 so that the base plate 34
However, the number of the ventilation holes 84 and the number of the ventilation holes 88 are not limited to this. That is, an arbitrary number of ventilation holes 84 and 88 may be formed as necessary in consideration of various conditions such as the size and shape of the base plate 34 and the cover plate 76.

In this embodiment, the position detecting device 3
0 is attached to the drive unit 11, the ventilation hole 84 and the ventilation hole 88 are located on the same line in the radial direction centering on the ventilation holes 82 and 38, but the formation position of the ventilation hole 84 and the ventilation hole 88 Is not limited to this. That is, the ventilation holes 84 and 88 may be formed in a state where they are separated from each other so that the ventilation holes 84 and the ventilation holes 88 do not face each other.
For example, the ventilation holes 8 are located on the same circumference in the radial direction centered on the through holes 82 and 38 and at positions separated from each other in the circumferential direction.
4 and the vent hole 88 may be formed, and even in this case, the effect described above is not impaired.

[0040]

[0041]

As described above, in the driving device according to the present invention, the inside of the driving section is opened to the atmosphere by the ventilation section, and the inside of the control section is further opened by the ventilation hole provided in the partition wall. Since it communicates with the inside of the driving unit, the temperature and the atmospheric pressure in the control unit can always be maintained in the same state as the outside. For this reason, dew condensation in the control unit can be prevented, and problems such as malfunction of the control unit due to dew condensation can be reliably prevented.

[Brief description of the drawings]

FIG. 1 is a perspective view of a driving device according to an embodiment of the present invention.

FIG. 2 is a sectional view of the driving device taken along line 2-2 of FIG.

FIG. 3 is a front view of the driving device from the direction of arrow A in FIG. 1 with a motor removed.

FIG. 4 is a plan view (back view) from the back side of the driving device according to the embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 10 driving device 11 driving unit 11A motor 20 shaft (output shaft) 30 position detecting device (control unit) 34 base plate (partition wall) 70 vertical hole (venting unit) 71 cap (venting unit) 72 side hole (venting unit) 76 cover plate (Partition) 84 Vent 88 Vent

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H02K 7/116

Claims (2)

(57) [Claims] A driving unit having a rotation shaft of a motor connected to an output shaft via a gear, and having a ventilation unit for outputting a rotation force of the motor from the output shaft and opening the inside to the atmosphere; Once shielded from the outside is integrally attached to the front SL driver co, a drive system including a controller, a for detecting the rotational position of the output shaft, each of said drive unit and the control unit With a partition wall
A gap between the partition of the drive unit and the partition of the control unit
The ventilation holes communicating with each other through the
A drive device formed on both partition walls of the control unit . Wherein the motor rotary shaft is connected to the output shaft through the gears, the rotational force of the motor to output from the output shaft, together with the vent opened to the atmosphere inside is provided, in the partition wall Ventilation that opens at a different location than the ventilation
A drive unit having a hole formed therein, and is formed on a partition of the drive unit while being shielded from the outside.
Formed on the partition wall of the drive unit at a position separated from the vent hole.
Another vent integrally attached to the driving unit via another partition wall is formed, the output shaft drive operated device that includes a control unit for detecting the rotational position of communicating with the vent holes .