JPH10185622A - Position detecting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a position detecting device capable of highly precisely detecting the position of the window glass of a power window device, setting the initial position without accompanied by a complicated regulation, and sufficiently ensuring the connecting fixing strength of a pulse plate interlocked with a motor output shaft to surely transmit a torque. SOLUTION: In a position detecting device 30, a pulse signal generating pulse plate 192 is nipped by a washer 220 and a connecting shaft 42, and a projection 45 is fitted to a fitting hole 198 and a connecting hole 224, and the top end part is caulked to a washer 220, and connected and fixed thereto. Thus, even if a large rotating force is worked from a sun gear 44 (connecting shaft 42) to the pulse plate 192, the rotating force can be surely transmitted without unnecessarily releasing the connection between the sun gear 44 (connecting shaft 42) and the pulse plate 192, and only the sun gear 44 is prevented from being idled.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a position detecting device used in a power window device for opening and closing a window glass of a vehicle door and a sunroof device for opening and closing a sunroof.

[0002]

2. Description of the Related Art For example, a motor is used as a drive source in a power window device for opening and closing a window glass of a vehicle and a sunroof device for opening and closing a sunroof.

[0003] Here, for example, some power window devices have a so-called anti-trapping function for preventing the occupant's body and foreign substances from being unnecessarily trapped 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 the rotational position of the motor is controlled by judging whether or not the pinch has occurred based on the pulse width.

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.

Therefore, the present applicant has already proposed a position detecting device for a moving body which can solve such a drawback (for example, Japanese Patent Application Nos. 6-175873 and 8-451).
No. 89).

The moving body position detecting device is provided integrally with a planetary gear set including a ring gear rotatably held by a cover plate of the device and a planetary gear meshing with the ring gear, and a ring gear of the planetary gear set, and rotates together with the ring gear. A switch unit comprising a moving contact to be fixed and a fixed contact fixed to the cover plate and capable of contacting the moving contact;
Alternatively, it is configured to include a clutch mechanism or the like that interrupts transmission of rotational force in the forward direction from the moving body (motor output shaft) to the ring gear. Thus, when used in a power window device or a sunroof device, the position of the window glass or sunroof can be detected with high accuracy, and not only can the movement be controlled, but also without complicated adjustment. The initial position can be set, and this can be realized at a low cost with a simple structure.

Further, in this position detecting device, a pulse plate is integrally connected and fixed to the sun gear of the planetary gear set. The pulse plate is provided with a continuous pulse pattern, and generates a pulse by rotating integrally with a sun gear (ie, a moving body such as a motor output shaft). Thereby, the generated pulse is detected, and the moving position of the moving body can be linearly detected based on the detected pulse signal. Therefore, for example, when this position detection device is used for a power window device of a vehicle having a pinch prevention function, the movement position of the window glass can be detected at any time.

In the moving object position detecting device, the pulse plate is integrated with the sun gear in order to rotate (integrally) the pulse plate in synchronization with the moving object such as a motor output shaft. It is structured to be connected and fixed. That is, for example, an octagonal fitting hole is formed in the center portion of the pulse plate, and the shaft of the sun gear is also formed in an octagonal shape corresponding to this, and the shaft of the sun gear is fitted into this fitting hole. The sun gear and the pulse plate are integrally connected and fixed by partially caulking the periphery of the shaft portion.

[0009] However, it is difficult to securely connect and fix the sun gear and the pulse plate by such a simple caulking.
That is, since the shaft of the sun gear is made of metal and the pulse plate is made of resin, it is difficult to increase the connection fixing strength simply by partially caulking the periphery of the shaft of the sun gear. there were. Therefore, when the rotational torque transmitted from the sun gear to the pulse plate increases, the connection between the sun gear and the pulse plate is unnecessarily released, and there is a possibility that the rotational force is not transmitted and only the sun gear idles. There was room for improvement.

[0010]

SUMMARY OF THE INVENTION In consideration of the above fact, the present invention can detect the position of a moving body such as a window glass or a sunroof with high accuracy and can set an initial position without complicated adjustment. Not only can this be achieved at a low cost with a simple structure, but also the strength of the connection between the motor output shaft and the pulse plate can be sufficiently secured to improve durability, and only the motor output shaft runs idle. It is an object of the present invention to provide a position detecting device capable of transmitting torque securely and rotating a pulse plate synchronously (integrally) with a motor output shaft without causing torque.

[0011]

According to a first aspect of the present invention, there is provided a position detecting device which is linked with a motor output shaft rotating in a forward / reverse direction and is turned on / off so as to perform a predetermined rotation position of the motor output shaft. And a pulse plate that is integrally connected to an extension of the motor output shaft and generates a pulse in conjunction with the motor output shaft,
A pulse detecting means for detecting a pulse generated by the pulse plate; and a position detecting device for detecting a predetermined rotational position of the motor output shaft, wherein a fitting provided at an extension of the motor output shaft is provided. A projection for connection, a fitting hole formed in the pulse plate and fitted with the projection, the projection is fitted into the fitting hole, and in this state, the tip of the projection is The pulse plate is integrally connected and fixed to the motor output shaft by caulking around the fitting hole.

In the position detecting device according to the first aspect, when the motor output shaft rotates in the forward and reverse directions and reaches a predetermined rotational position,
A switch unit linked to the motor output shaft is operated, whereby a predetermined rotational position of the motor output shaft is detected. In this case, in a configuration in which the number of rotations of the armature of the motor for driving the power window device is detected using a Hall IC or the like, and the motor rotation axis, that is, the moving position of the window glass, is detected, the control circuit includes a counter. Although indispensable, the present position detecting device can accurately determine the position only by a single ON / OFF signal, eliminates the need for a counter in the control circuit, and reduces the cost.

Further, in the position detecting device according to the first aspect,
The pulse generated from the pulse plate is detected by the pulse detecting means. Since the pulse plate is linked to the motor output shaft, it is possible to linearly detect the rotational position of the motor output shaft based on the detected pulse signal. Therefore, for example, when this position detection device is used for a power window device of a vehicle having a pinch prevention function, the movement position of the window glass can be detected at any time.

Further, in the position detecting device according to the first aspect of the present invention, in a connection fixed portion between the motor output shaft and the pulse plate (ie, an extension portion of the motor output shaft), a fitting connection provided on the extension portion. Is fitted into the fitting hole of the pulse plate, and in this state, the tip of the projection is swaged around the fitting hole, and the pulse plate is integrally connected and fixed to the motor output shaft. Therefore, the pulse plate is securely connected and fixed to the motor output shaft (extended portion) by the fitting force between the projection of the extended portion of the motor output shaft and the fitting hole of the pulse plate and the caulking force of the projection around the fitting hole. Is done.

As a result, a sufficient connection fixing strength between the motor output shaft and the pulse plate can be ensured, the durability is improved, and the rotational torque transmitted from the motor output shaft to the pulse plate is increased. Even if there is a motor, the connection between the motor output shaft and the pulse plate will not be unnecessarily released, and only the motor output shaft will not run idle. It can be rotated (integrally) synchronously with the shaft.

A position detecting device according to a second aspect of the present invention is the position detecting device according to the first aspect, wherein a ring gear rotatably held on a cover plate of the device, a planetary gear meshing with the ring gear, and meshing with the planetary gear. And a sun gear provided on an extension of the motor output shaft, and a planetary gear set interlocked with the motor output shaft, wherein the pulse plate is integrally fixed to a shaft portion of the sun gear. It is characterized by.

According to a second aspect of the present invention, a sun gear is provided at an extension of the motor output shaft, and when the motor output shaft rotates in the forward and reverse directions, the rotational force is applied to the sun gear, the planetary gear and the sun gear. The power is transmitted to the ring gear, and the ring gear rotates in conjunction with the motor output shaft.
When the motor output shaft reaches a predetermined rotation position, a switch unit linked to the motor output shaft is operated, whereby a predetermined rotation position of the motor output shaft is detected.

Further, in the position detecting device according to the second aspect,
The pulse generated from the pulse plate with the operation of the planetary gear set is detected by the pulse detecting means. Since the planetary gear set is linked to the motor output shaft, the rotational position of the motor output shaft can be linearly detected based on the detected pulse signal. Therefore, for example, when this position detection device is used for a power window device of a vehicle having a pinch prevention function, the movement position of the window glass can be detected at any time.

Further, in the position detecting device according to the second aspect, in the connection fixing portion between the sun gear and the pulse plate (ie, the shaft portion of the sun gear), the fitting connection projection is fitted into the fitting hole of the pulse plate. In this state, the tip of the projection is swaged around the fitting hole, and the pulse plate is integrally connected and fixed to the shaft of the sun gear. Therefore, the fitting force between the shaft portion of the sun gear and the fitting hole of the pulse plate, the fitting force between the projection and the fitting hole of the pulse plate,
And the pulse plate is securely connected and fixed to the shaft portion of the sun gear, that is, the motor output shaft by the caulking force of the projection around the fitting hole.

As a result, the connection strength between the sun gear and the pulse plate can be sufficiently secured, the durability is improved, and even if the rotational torque transmitted from the sun gear to the pulse plate increases, The connection between the sun gear and the pulse plate is not unnecessarily released, the rotational force can be reliably transmitted, and only the sun gear does not run idle.

According to a third aspect of the present invention, there is provided the position detecting device according to the first or second aspect, wherein a connection hole in which the projection is fitted is formed, and the motor output shaft is provided with respect to the pulse plate. And a washer which is disposed on the opposite side to the extension of the motor output shaft and clamps the pulse plate by the extension of the motor output shaft, and in which the tip of the projection is swaged in this clamping state.

In the position detecting device according to the third aspect, a fixed connection portion between the motor output shaft and the pulse plate (ie, a fixed portion).
(Extended portion of the motor output shaft), the pulse plate is sandwiched and fixed by the extended portion of the motor output shaft and the washer. That is, the fitting connection projection provided on the extension portion is fitted into the fitting hole of the pulse plate, the projection is fitted into the connection hole of the washer, and the projection is held by the extension portion and the washer. The tip of the projection is swaged by a washer, and the pulse plate is integrally connected and fixed to the motor output shaft. Accordingly, the pulse plate is driven by the fitting force between the protrusion of the extension portion of the motor output shaft and the fitting hole of the pulse plate, the caulking force of the protrusion on the washer, and the clamping force of the extension portion of the motor output shaft and the washer. It is more securely connected and fixed to the shaft (extended part).

As a result, the connection fixing strength between the motor output shaft and the pulse plate can be more sufficiently secured, the durability is improved, and the rotational torque transmitted from the motor output shaft to the pulse plate is increased. However, the connection between the motor output shaft and the pulse plate is not unnecessarily released, and the motor output shaft alone does not run idle. It can be rotated (integrally) synchronously with the motor output shaft.

According to a fourth aspect of the present invention, in the position detecting device of the third aspect, a burring process is performed on a connection hole of the washer.

According to a fourth aspect of the present invention, when the tip of the projection is swaged by the washer in a state of being clamped by the washer, the pulse plate is integrally connected and fixed to the extended portion of the motor output shaft. In addition, since the connection hole of the washer is subjected to burring, the pulse plate is not unnecessarily broken when the tip of the projection is swaged, and the tip of the projection is securely swaged by the washer.
Therefore, the pulse plate is more securely connected and fixed by the motor output shaft.

[0026]

FIG. 2 is an overall perspective view of a position detecting device 30 according to an embodiment of the present invention and a motor 10 for a power window device to which the position detecting device 30 is applied. . FIG. 3 shows the position detecting device 30.
2 is a sectional view of the motor 10.

The motor 10 includes a motor section 10A and a gear section 10B connected to the motor section 10A. The rotating shaft 12 of the motor unit 10A extends into the gear unit 10B, and a worm gear 14 is formed at the tip. The worm gear 14 meshes with a rotating gear wheel 16 arranged in the gear section 10B.

The rotary gear wheel 16 has a shaft 20 as a motor output shaft rotatably supported by a cover 18 of the gear portion 10B. For this reason, when the motor unit 10A operates and the rotating shaft 12 rotates, the rotating force is transmitted to the rotating gear wheel 16 via the worm gear 14 and the shaft 20 is rotated.
Is designed to rotate. An output fitting portion 22 is provided at the tip of the shaft 20, and is configured to be connected to a drive portion (not shown) of the window regulator. In this embodiment, for example, the window glass is set to move one stroke when the shaft 20 (output fitting portion 22) rotates three to 3.5 times.

On the other hand, a position detecting device 30 is mounted on the surface of the gear portion 10B opposite to the output fitting portion 22.

As shown in detail in FIG.
Is provided with a base plate 34 and a cover plate 36, both of which are formed in a thin, substantially cylindrical shape. The base plate 34 has a through hole 38 at the center thereof, and a projection 40 is formed on the inner peripheral surface of the cover plate 36 so as to protrude in the axial direction.

The position detecting device 30 has a connecting shaft 42 that forms an extension of the motor output shaft.
One end of the connecting shaft 42 is integrally connected to the shaft 20 of the rotating gear wheel 16 and always rotates integrally with the shaft 20, and the other end is detected through a through hole 38 formed in the base plate 34. Device 30 (base plate 3
4 and the cover plate 36). A sun gear 44 constituting a planetary gear set is provided near the other end of the connection shaft 42, and meshes with a planetary gear 54 described later. Further, the connecting shaft 4
2, a plurality of (four in the present embodiment) projections 45 are formed in the vicinity of the periphery of the sun gear 44, and a fitting hole 198 and a washer 2 of a pulse plate 192 described later are formed.
20 are fitted in the connection holes 224.

Around the connecting shaft 42, a ring gear 46 constituting a planetary gear set is disposed so as to face the sun gear 44. This ring gear 46 covers the cover plate 3.
6, and a flange portion 48 is integrally formed around the ring gear 46 as shown in detail in FIG. Flange part 48 is ring gear 4
The movable contact 50A, 50B is provided on a part of the peripheral surface opposite to the cover plate 36 on a conductive plate integrally formed with the conductive plate 6. The moving contacts 50A and 50B are non-conductive portions formed in a two-stage arc shape, and are formed so as to be substantially flush with the flange portion 48. Further, a protrusion 52 is formed on a part of the peripheral edge of the flange portion 48 so as to protrude. This protrusion 5
2 are projections 40 formed on the cover plate 36 described above.
When the ring gear 46 (flange portion 48) rotates in the forward direction (the direction of arrow A in FIG. 1) and reaches a predetermined rotational position, the projection 52 comes into contact with the projection 40 (FIGS. 5 and 5). 7 state), and further rotation of the ring gear 46 in the forward direction is prevented.

Two planetary gears 54 are arranged on the inner peripheral portion of the ring gear 46 between the sun gear 44 and the sun gear 44. As shown in detail in FIG. 9, these planetary gears 54 are rotatably supported by a carrier 56 and mesh with both a ring gear 46 and a sun gear 44. That is, the sun gear 44 and the ring gear 4
The planetary gear set 6 and the planetary gear set 54 can transmit the rotation of the connecting shaft 42 (that is, the shaft 20) at a reduced speed. For example, the carrier 56 is held and the planetary gear 54 is prevented from revolving. In the state, the rotation of the connection shaft 42 (that is, the shaft 20) can be reduced and transmitted to the ring gear 46.

Here, in this embodiment, the reduction ratio of the planetary gear set including the sun gear 44, the ring gear 46, and the planetary gear 54 is set to 5.2: 1. 44 is 3
The ring gear 46 is configured not to make one or more rotations (during rotation to 3.5 rotations).

The reduction ratio of the planetary gear set is set at 5.
The ratio is not limited to 2: 1, but can be set as desired.

The sun gear 44 and the ring gear 4 having the above constructions
The planetary gear set composed of the planetary gears 6 and the planetary gears 54 is covered by the cover plate 36 and held by the protection plate 200 to prevent the planetary gear set from falling off the cover plate 36. Cover plate 36 and carrier 5
6, a wave washer 58 and a washer 59 constituting a clutch mechanism are arranged. The wave washer 58 is integrally attached to the carrier 56. The washer 59 is pressed into the inner peripheral surface of the cover plate 36 integrally.
Abuts against the washer 59 in a compressed state. As a result, the wave washer 58 is constantly pressing the carrier 56, and the carrier 56 is in contact with the protection plate 200. For this reason, the carrier 56 is normally pressed by the wave washer 58 (the carrier 56 and the protection plate 2).
Therefore, the planetary gear 54 is held in a state where the revolution is prevented. On the other hand, in a state where the projection 52 of the flange portion 48 of the ring gear 46 abuts the projection 40 and further rotation of the ring gear 46 in the forward direction is prevented, the sun gear 44 which exceeds the pressing force (retention force) of the carrier 56 is used. The wave washer 58 is configured to release the holding of the carrier 56 and allow the planetary gear 54 to revolve when the forward rotation force acts. That is, the wave washer 58 can block the transmission of the rotational force in the forward direction from the sun gear 44 (the shaft 20) to the ring gear 46 after the protrusion 52 of the flange portion 48 comes into contact with the protrusion 40. It has become. Therefore, when the sun gear 44 (the shaft 20) rotates in the forward direction (the direction in which the ring gear 46 is rotated in the forward direction) in a state where the rotation of the ring gear 46 is prevented by the projection 52 abutting on the projection 40. , Only the planetary gear 54 revolves.

The cover plate 36 is provided with two pairs of fixed contacts 60A, 61A and fixed contacts 60B, 61B. Each of the fixed contacts 60A and 61A and the fixed contacts 60B and 61B is a pair of resilient contact plates, and as shown in detail in FIG. 11, the fixed contacts 60A and 60B are integrally formed. At the same time, the fixed contact 61A and the fixed contact 61B are formed integrally. One end of each of the fixed contacts 60A and 61A and the fixed contacts 60B and 61B is fixed to the cover plate 36, and the distal end is a flange 4 of the ring gear 46.
8, each of which has a distal end elastically in contact with a flange portion 48 (a peripheral surface opposite to the cover plate 36). That is, as shown in detail in FIG. 4, the fixed contacts 60A and 61A and the fixed contacts 60B and 61B are configured to press the flange portion 48 (moving contacts 50A and 50B) of the ring gear 46 from the side opposite to the cover plate 36.

The fixed contacts 60A and 61A and the fixed contacts 60B and 61B contact the moving contacts 50A and 50B at a predetermined rotation position of the ring gear 46. In addition,
The fixed contacts 60A and 61A correspond to the moving contact 50A, and the fixed contacts 60B and 61B correspond to the moving contact 50B.

Further, these fixed contacts 60A, 61
A, fixed contacts 60B and 61B are electrically connected to the control circuit of the power window device,
When 0B comes into contact with the fixed contacts 60A and 60B to be in a non-conductive state, the rotational position of the ring gear 46, that is, the rotational position of the sun gear 44, that is, the rotational position of the shaft 20 can be detected, which will be described later. Used for controlling the rotation of the motor 10.

Here, in the present embodiment, for example, when the window glass reaches a position 4 mm downward from the upper end stop position, the projection 52 is rotated by a predetermined rotation angle from the position in contact with the projection 40. When the movable contact 50A, 50B reaches the upstream position,
The dimensions and the like of the respective parts are set so that the non-conductive state is maintained by contacting the protrusions 52 with the protrusions 40 after contact with the projections A and 60B.

Contrary to the above, when the window glass reaches a position 4 mm downward from the upper end stop position, the projection 5
At a point in time when the movable contact 2 reaches a position on the upstream side of a predetermined rotation angle from a position where it contacts the projection 40, the moving contacts 50A and 50B come into contact with the fixed contacts 60A and 61A and the fixed contacts 60B and 61B to be in a conductive state. The configuration may be such that the position is detected. Further, after the non-conducting state or the conducting state as described above, it is not always necessary to maintain the non-conducting state or the conducting state electrically, and the moving contacts 50A and 50B are fixed to the fixed contacts 60A and 61A. It may be configured such that it is determined that a predetermined rotational position has been reached by detecting a trigger signal due to contact with 60B and 61B.

The position detecting device 30 includes a pulse plate 192 as pulse generating means and a sliding contact 196 as pulse detecting means.

As shown in detail in FIGS. 12 and 13, the pulse plate 192 is formed in a thin disk shape, and a fitting hole 198 is formed in the center. This fitting hole 1
98 is formed in a cross shape corresponding to the connecting shaft 42 and the projection 45 thereof.
And each projection 45 is fitted. A washer 220 is disposed on the opposite side of the pulse plate 192 from the connection shaft 42, and the washer 220 and the connection shaft 42 sandwich the pulse plate 192. The through hole 222 corresponding to the sun gear 44 and the connection hole 224 corresponding to the projection 45 of the connection shaft 42 are formed in the washer 220, and the sun gear 44 and each projection 45 are fitted therein. That is, the protrusion 45 of the connection shaft 42 provided with the sun gear 44 is
By fitting the projections 45 into the connection holes 224 of the washer 220 and fitting the tips of the projections 45 to the washer 220 in this sandwiched state, the pulse plate 192 is The structure is such that it is integrally connected and fixed to the connection shaft 42 (sun gear 44). Thereby, the pulse plate 192 always rotates integrally with the connection shaft 42.

The pulse plate 192 includes a conductive portion 1.
94 are provided. The conductive portion 194 is provided along the circumferential direction on the periphery of the pulse plate 192, and has a ring-shaped first conductive portion 194A and a second conductive portion adjacent to the first conductive portion 194A and in which pulse-shaped irregularities are continuous. 194B.

On the other hand, the sliding contact 196 has a base fixed to the cover plate 36 and a conductive portion 1 of the pulse plate 192.
94, and is always the first of the conductive portions 194.
An input contact 196A that contacts the conductive portion 194A and an output contact 196 that contacts the second conductive portion 194B of the conductive portion 194.
B. Thus, the pulse signal can be detected with the rotation of the pulse plate 192. The detected pulse signal is used for controlling the moving position of the moving body (window glass).

The conductive portion 194 is connected to the pulse plate 19.
2 may be provided on the peripheral side wall of the pulse plate 192 without being provided on the upper surface. In this case, the sliding contact 19
6 is fixed to the cover plate 36 so as to face the peripheral side wall of the pulse plate 192.

Further, between the pulse plate 192 and the ring gear 46 (flange portion 48), the above-described protection plate 200 is disposed. This protection plate 20
Reference numeral 0 denotes a peripheral portion that is held and fixed to the cover plate 36 to hold the ring gear 46, the carrier 56, and the like to prevent falling off from the cover plate 36, and to prevent the pulse plate 192 and the ring gear 46 (flange portion 48) from coming off. By intervening between them, their movement is restricted so that they do not contact unnecessarily.

Next, the operation of the present embodiment will be described with reference to a flowchart shown in FIG. 15 by taking as an example a case where a window glass is moved upward by operating a lift switch of a power window device.

The motor 10 and the position detecting device 3 having the above configuration
At 0, when the raising switch of the power window device is operated in step 201, the motor 10 is operated to rotate the shaft 20 in step 202, whereby the window regulator is operated to raise the window glass.

Here, normally (during the rising of the window glass), the carrier 56 is
Is pressed and held, and the planetary gear 54 is in a state where its revolution is prevented. Therefore, the axis 20
With the rotation of, the rotational force of the connecting shaft 42 (that is, the sun gear 44) is reduced via the planetary gear 54 and transmitted to the ring gear 46, and the ring gear 46 is gradually rotated in the forward direction.

Next, at step 204, the position detecting device 30 detects whether or not the motor 10 has reached a predetermined rotational position, that is, the window glass has reached a predetermined position (a position 4 mm below the upper end stop position).

That is, in the position detecting device 30, the shaft 20
The rotational force of the connecting shaft 42 (that is, the sun gear 44) is reduced via the planetary gear 54 and transmitted to the ring gear 46 with the rotation of the ring gear 46, and the ring gear 46 is gradually rotated in the forward direction. If the protrusion 52 does not reach the position 4 mm downward from the protrusion, the protrusion 52 is largely separated from the protrusion 40 and the moving contact 5
0A and 50B are fixed contacts 60A and 61A, fixed contacts 60
B, 61B and are in a non-contact state. Thereby, the rotation position of the shaft 20 (the fact that the window glass has not reached the position 4 mm below the upper end stop position) is detected. In this case, the operation proceeds to step 206 while the operation of the motor 10 is continued, and it is determined whether or not a foreign object is caught based on the lock current of the motor 10 and the like. If it is detected that a foreign object has been caught, the motor 10 is rotated in the reverse direction in step 208, and the window glass is lowered. On the other hand, if no entrapment of foreign matter is detected in step 206, the process returns to step 204 again.

On the other hand, when the window glass reaches a position 4 mm downward from the upper end stop position in step 204, the protrusion 52 reaches a position upstream of a position abutting on the protrusion 40 by a predetermined rotation angle. Further, at this point, the moving contacts 50A and 50B are fixed contacts 60A and 60B.
Are brought into a non-conductive state by contact with the
(The window glass has reached a position 4 mm downward from the upper end stop position).

In step 204, the shaft 2 of the motor 10
When 0 is detected as the predetermined rotation position, that is, when the window glass has reached the predetermined position, the process proceeds to step 210 while the operation of the motor 10 is continued. At this time, the relative contact positions of the moving contacts 50A, 50B and the fixed contacts 60A, 60B and the fixed contacts 61A, 61B change due to the rotation of the ring gear 46, but the non-conduction state is maintained.

In step 210, it is determined whether or not the window glass is fully closed based on the lock current of the motor 10. When the window glass is fully closed, the motor 10 is stopped in step 212, and the process ends.

As described above, in the position detecting device 30, the moving contacts 50A and 50B which rotate together with the ring gear 46, the pair of fixed contacts 60A and 61A, and the fixed contacts 60B and 6 are provided.
1B, the rotational position of the shaft 20, that is, the position of the window glass (whether or not the position reached 4 mm downward from the upper end stop position) can be detected with high accuracy.

Further, in the position detecting device 30, when the shaft 20 of the motor 10 is once sufficiently rotated in the forward direction at the time of being mounted on the vehicle body, the moving contacts 50A, 50B
Can automatically be set to the initial state of contact with the fixed contacts 60A and 60B.

That is, when the motor 1 is mounted on the vehicle body,
Once the 0 axis 20 is fully rotated once in the positive direction,
The protrusion 52 of the flange portion 48 of the ring gear 46
, And further rotation of the ring gear 46 in the forward direction is prevented. In this state, the shaft 20
Rotates, the rotational force of the sun gear 44 exceeding the pressing force (holding force) of the carrier 56 acts, and the wave washer 5
8 releases the holding of the carrier 56 and the planetary gear 5
4 revolutions are possible. That is, the wave washer 58 can block the transmission of the rotational force in the forward direction from the sun gear 44 (the shaft 20) to the ring gear 46 after the protrusion 52 of the flange portion 48 comes into contact with the protrusion 40. , The projection 52 abuts the projection 40 and the ring gear 46
In this state, when the sun gear 44 (the shaft 20) rotates in the forward direction (the direction in which the ring gear 46 is rotated in the forward direction), only the planetary gear 54 revolves. Therefore, after the protrusion 52 contacts the protrusion 40 and the moving contacts 50A and 50B contact the fixed contacts 60A and 60B, even if the shaft 20 of the motor 10 rotates in the forward direction, the ring gear 46 is not moved and the moving contact 50A , 50B
And the fixed contacts 60A and 60B remain in contact with each other. That is, once the shaft 20 of the motor 10 is sufficiently rotated in the forward direction, the protrusion 52 comes into contact with the protrusion 40, and the moving contacts 50A, 50B become fixed contacts 60A, 60B.
It is automatically set to the initial state in which B is touched.

In other words, in the position detecting device 30, the position separated by a predetermined distance (4 mm in the present embodiment) from the fully closed position of the window glass (the maximum movement limit in the upper direction) is set to the position where the window glass is fully closed (the upper position). Regardless of whether or not the maximum movement limit has been reached, the data can be stored mechanically (see above 4).
(Because detection is performed based on the position separated by mm), the movement control of the window glass can be reliably performed without error. For example, in the related art, in the configuration in which the rotation speed of the armature of the motor is detected to detect the moving position of the window glass, the configuration is such that the window glass is reset so as to be based on the fully closed position of the window glass. If the window glass stops without reaching the true upper maximum movement limit due to a decrease in the power supply voltage or an increase in frictional resistance between the window glass and the window frame, the false stop position is set to the window glass. Is reset as the fully closed position of Therefore, in this case, since the drive of the motor is controlled based on the fully closed position of the false window glass, the error becomes extremely large. On the other hand, in the position detection device 30, even when the window glass stops without reaching the true fully closed position (upper limit of maximum movement), thereafter, the window glass is separated by 4 mm from the true fully closed position. This is reliably detected at the time of passing the position, so that the movement control of the window glass can be reliably performed without error. In particular, in the wire type window regulator device, the error of the movement position control due to the slack of the wire is large, but by using the position detection device 30, the error caused by the slack of the wire can be absorbed, and the control can be performed with high precision. It is possible to do.

As described above, in the position detecting device 30, when the shaft 20 of the motor 10 is once sufficiently rotated in the forward direction at the time of assembling to the vehicle body, the projection 52 comes into contact with the projection 40 and the moving contact 50A, 50B is automatically set to the initial state in contact with the fixed contacts 60A and 60B, and the initial position can be easily set without complicated adjustment of the mounting position during assembly and complicated resetting after assembly. In addition, the movement control of the window glass can be reliably performed without error.

The position detecting device 3 according to the present embodiment
At 0, the pulse signal is detected by the output contact 196B repeatedly contacting / non-contacting the second conductive portion 194B of the conductive portion 194 with the rotation of the pulse plate 192. Therefore, it is possible to linearly detect the rotational position of the shaft 20 of the motor 10 based on the detected pulse signal.

Therefore, for example, the position detecting device 30
Is used in a power window device of a vehicle having a pinching prevention function, the moving position of the window glass can be linearly detected and controlled at any time.

Further, in the position detecting device 30, the connecting shaft 42 (sun gear 44) and the pulse plate 192
Is fixedly connected to the connecting plate 42 by sandwiching the pulse plate 192 between the connecting shaft 42 and the washer 220. That is, the connecting shaft 4
2 are fitted into fitting holes 198 of the pulse plate 192, and these projections 45 are fitted into the connecting holes 224 of the washer 220, and the connecting shaft 42. The tip end of the projection 45 is swaged by the washer 220 in a state of being sandwiched by the washer 220 and the washer 220, and the pulse plate 192 is integrally connected and fixed to the connection shaft 42. Therefore, the connecting shaft 4
The pulse plate 192 is connected to the connection shaft 42 (that is, by the force of fitting the protrusion 45 of FIG. , Sun gear 44).

As a result, it is possible to sufficiently secure the connection fixing strength between the sun gear 44 and the pulse plate 192, thereby improving the durability.
Even when the rotational torque transmitted to the gear 92 increases, the connection between the sun gear 44 and the pulse plate 192 is not unnecessarily released, and the rotational force can be reliably transmitted. Will not run idle.

As described above, the position detecting device 30 according to the present embodiment can detect the position of the moving body such as the window glass with high accuracy and can set the initial position without complicated adjustment. In addition, this can be realized not only with a simple structure and at low cost, but also with sufficient connection and fixing strength between the sun gear 44 and the pulse plate 192 to improve the durability. It is possible to transmit the torque without fail.

In the above embodiment, the connection hole 224 formed in the washer 220 corresponding to the projection 45 of the connection shaft 42 is a simple through-hole. However, the present invention is not limited to this. As in the case of the connection hole 228 of the washer 226 shown in FIG.

In this case, the tip of the projection 45 is swaged by the washer 226 while being held between the connecting shaft 42 and the washer 226, and the pulse plate 192 is integrally connected and fixed to the connecting shaft 42 (sun gear 44). At this time, the pulse plate 192 is not unnecessarily destroyed by caulking the tip of the projection 45, and the tip of the projection 45 is securely caulked to the washer 226. Therefore,
The pulse plate 192 is connected to the connecting shaft 42 (the sun gear 4).
4) The connection is more securely fixed.

Further, in the above-described embodiment, the washer 220 has the configuration in which the connection hole 224 is formed independently (separately) from the through-hole 222 corresponding to the sun gear 44, but is not limited thereto. 18, a portion corresponding to the sun gear 44 and a portion corresponding to the projection 45 of the connection shaft 42 are continuously formed like the connection hole 232 of the washer 230 shown in FIG. 18, that is, formed in the pulse plate 192. The cross-section may be formed similarly to the formed fitting hole 198.

Also in this case, a burring process may be applied as in the connection hole 236 of the washer 234 shown in FIG. 19, and the pulse plate 192 is more securely connected and fixed by the connection shaft 42 (sun gear 44). You. Further, in the above-described embodiment, the washer 220 is disposed on the opposite side of the pulse plate 192 from the connection shaft 42, and the pulse plate 192 is sandwiched between the washer 220 and the connection shaft 42 to connect the pulse plate 192 to the connection shaft. 42 (Sun gear 4
Although the structure described in 4) is integrally connected and fixed, the present invention is not limited to this, and the structure may be such that the washer 220 is omitted.

That is, as shown in FIGS. 20 and 21,
The plurality of projections 45 of the connection shaft 42 provided with the sun gear 44 are fitted into the fitting holes 198 of the pulse plate 192, and the tip of the projections 45 is swaged around the fitting holes 198 in this state, so that the pulse The plate 192 may be integrally connected and fixed to the connection shaft 42 (sun gear 44).

Even in this case, the pulse plate 192 is connected by the fitting force between the connecting shaft 42 and the projection 45 and the fitting hole 198 of the pulse plate 192 and the caulking force of the projection 45 around the fitting hole 198. Shaft 42
(That is, the sun gear 44).

As a result, it is possible to sufficiently secure the connection fixing strength between the sun gear 44 and the pulse plate 192, thereby improving the durability.
Even when the rotational torque transmitted to the gear 92 increases, the connection between the sun gear 44 and the pulse plate 192 is not unnecessarily released, and the rotational force can be reliably transmitted. Will not run idle.

In each of the above embodiments, the position detecting device 30 is applied to the motor 10 for the power window device, and the position of the output shaft (the shaft 20) of the motor 10 is detected and controlled. However, the present invention is not limited to this. The present invention is applied to a driving motor for a moving body (for example, a sunroof moving on a guide rail) that reciprocates linearly, and detects and controls the moving position. Is also possible.

[Brief description of the drawings]

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

FIG. 2 is an overall perspective view of a motor for a power window device to which the position detecting device according to the embodiment of the present invention is applied.

FIG. 3 is a cross-sectional view of a position detection device according to an embodiment of the present invention and a motor for a power window device to which the position detection device is applied.

FIG. 4 is an enlarged sectional view showing a correspondence between a ring gear and a fixed contact of the position detecting device according to the embodiment of the present invention.

FIG. 5 is a partially broken plan view of the position detecting device according to the embodiment of the present invention.

FIG. 6 is a plan view showing a correspondence between fixed contacts and movable contacts of the position detection device according to the embodiment of the present invention.

FIG. 7 is a partially broken plan view of the position detection device according to the embodiment of the present invention.

8A and 8B show a ring gear of the position detecting device according to the embodiment of the present invention, wherein FIG. 8A is a plan view and FIG. 8B is a sectional view.

FIG. 9 shows a planetary gear, a carrier and a wave washer of the position detecting device according to the embodiment of the present invention,
(A) is a plan view and (B) is a sectional view.

10A and 10B show a wave washer of the position detecting device according to the embodiment of the present invention, wherein FIG. 10A is a plan view and FIG. 10B is a sectional view.

FIG. 11 is a plan view of a fixed contact of the position detecting device according to the embodiment of the present invention.

12A and 12B show a pulse plate and a connection shaft of the position detection device according to the embodiment of the present invention, wherein FIG. 12A is a plan view and FIG. 12B is a cross-sectional view.

FIG. 13 is an exploded perspective view showing a correspondence relationship among a pulse plate, a connection shaft, and a washer of the position detection device according to the embodiment of the present invention.

14A and 14B show a protection plate of the position detection device according to the embodiment of the present invention, wherein FIG. 14A is a plan view and FIG. 14B is a sectional view.

FIG. 15 is a flowchart showing control performed when an ascending switch of a power window device to which the position detecting device according to the embodiment of the present invention is applied to operate the ascending switch to move the window glass upward;

FIG. 16 is a perspective view showing another example of the washer applied to the position detecting device according to the embodiment of the present invention.

17 is a sectional view of a pulse plate and a connection shaft to which the washer shown in FIG. 16 is applied.

FIG. 18 is a perspective view showing another example of the washer applied to the position detection device according to the embodiment of the present invention.

FIG. 19 is a perspective view showing another example of the washer applied to the position detecting device according to the embodiment of the present invention.

20A and 20B show another example of the connection configuration of the pulse plate and the connection shaft applied to the position detection device according to the embodiment of the present invention, wherein FIG. 20A is a plan view and FIG. 20B is a cross-sectional view. .

FIG. 21 is an exploded perspective view showing another example of the connection configuration between the pulse plate and the connection shaft applied to the position detection device according to the embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 10 motor 20 shaft (motor output shaft) 30 position detecting device 42 connecting shaft (extension of motor output shaft) 44 sun gear 45 projection 46 ring gear 50A, 50B moving contact 54 planetary gear 56 carrier 58 wave washer 60A, 60B fixed contact 61A, 61B Fixed contact 192 Pulse plate 196 Sliding contact (pulse detecting means) 198 Fitting hole 220 Washer 224 Connection hole 226 Washer 228 Connection hole 230 Washer 232 Connection hole 234 Washer 236 Connection hole

Continued on the front page (51) Int.Cl. ⁶ Identification symbol FI G01B 21/22 G01D 5/04 C G01D 5/04 B60J 1/17 A

Claims (4)

[Claims] 1. A switch unit which can detect a predetermined rotational position of the motor output shaft by turning on / off in conjunction with a motor output shaft rotating in a forward / reverse direction, and an extended portion of the motor output shaft. A pulse plate that is integrally connected and generates a pulse in conjunction with the motor output shaft; and a pulse detection unit that detects a pulse generated by the pulse plate. A position detection device for detecting, comprising: a fitting connection protrusion provided on an extension of the motor output shaft; and a fitting hole formed in the pulse plate and fitted with the protrusion, The pulse plate is integrally connected to the motor output shaft by fitting a protrusion into the fitting hole and caulking a tip end of the protrusion around the fitting hole in this state. Boss was, the position detecting device, characterized in that. 2. The motor, comprising: a ring gear rotatably held on a cover plate of the device; a planetary gear meshing with the ring gear; and a sun gear meshing with the planetary gear and provided on an extension of the motor output shaft. The position detecting device according to claim 1, further comprising a planetary gear set interlocking with an output shaft, wherein the pulse plate is integrally fixed to a shaft portion of the sun gear. 3. A connecting hole into which the projection is fitted is formed,
A washer is provided on the side opposite to the extension of the motor output shaft with respect to the pulse plate to clamp the pulse plate with the extension of the motor output shaft and to clamp the tip of the projection in the clamped state. The position detecting device according to claim 1 or 2, wherein: 4. The position detecting device according to claim 3, wherein a burring process is performed on a connection hole of the washer.