JPH0643399U - Geared motor - Google Patents

Abstract

(57) [Summary] [Purpose] A plurality of seating posture control devices of a power seat can be operated under the drive of one drive motor. [Structure] A plurality of output gears 16 are connected via a ring gear 14 so as to be interlocked with the drive of a drive motor 12. Then, cam pieces 46-1 to 46-3 that move under the drive of the cam motor 50 are arranged so as to be able to press and support the movable shaft 38 in the coupling direction of the clutch 42.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention mainly relates to a geared motor provided as a drive source for a seating posture control device provided along with a power seat.

[0002]

[Prior art]

 For example, a so-called power seat equipped with a seating posture control device that can be operated under the drive control of a motor is well known as a vehicle seat represented by an automobile.

In a power seat of an automobile or the like, a seat slide device that adjusts a seat position in the front-rear direction, a seat tilt device that adjusts a seat tilt angle (tilt angle) in the front-rear direction, and a seat back A reclining device for adjusting the tilt angle (reclining angle) is also installed. The overall position of the seat, that is, the seated posture, depends on the seated person's preference, body shape, etc. due to the operation of each device accompanying the driving of the corresponding motor under a predetermined switch operation. The power seat is configured so that it can be adjusted as desired.

A DC geared motor is generally used as a drive source for such a seating posture control device for a power seat, and the motor is drive-controlled by a motor control device having a microcomputer or the like, for example. .

According to such a power seat, the seat position suitable for the seated person's preference, body shape, etc., that is, the seated posture, can be easily obtained under predetermined switch operation, etc. Comfort and safety can be sufficiently secured.

[0006]

[Problems to be solved by the device]

 By the way, in a known power seat, a motor is provided for each seating posture control device mounted on the seat, and each device operates under the drive of an individual motor, that is, a seat, a seat back, and the like. The movable member of is movable.

However, in a power seat of an automobile or the like, usually, a plurality of seating posture control devices such as a seat slide device, a seat tilt device, and a reclining device are provided side by side, so that one seat is provided with these seating posture control devices. You need as many motors as there are devices. Therefore, the total number of parts of the seat increases, and the increase in weight due to the multiple motors is inevitable.

[0008] The increase in the number of parts associated with the increase in the number of motors tends to complicate the configuration, resulting in an increase in part cost in proportion to the number of parts and an increase in product cost due to complicated assembly work. May be caused.

Further, since it is necessary to secure a space for mounting the motor for each seating attitude control device, it is inevitable that each device is upsized. Therefore, there is a possibility that the overall size of the seat may be increased, and the cushioning property of the seat may be reduced due to the increase in size of each device, which is not preferable.

The present invention aims to provide a geared motor capable of operating a plurality of seating posture control devices with one unit.

[0011]

[Means for Solving the Problems]

 To achieve this object, according to the present invention, the pinion of the drive motor is meshed with either the external gear or the internal gear of the rotatably supported ring gear, and the pinion of the drive motor is interlocked with the drive of the drive motor. The ring gear can rotate in the corresponding direction. Further, a plurality of output gears that can mesh with the other gear of the ring gear are provided, and an output means having a movable shaft and an output shaft is provided for each output gear.

Then, a cam plate having a predetermined number of cam pieces is rotated under the drive of a cam motor, and any one of the movable shafts is pressed and supported by the cam pieces, so that only the corresponding output shaft is supported. The driving force of the driving motor can be transmitted to the.

[0013]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

As shown in FIGS. 1 and 2, in the geared motor 10 according to the present invention, the drive of the drive motor 12 is transmitted to the output gears 16 (16-1 to 16-4) via the ring gear 14. It is possible.

The ring gear 14 is formed, for example, in a ring shape having an external gear 14a and an internal gear 14b, and is rotatably supported inside the housing portion 20 of the case body 18, as shown in FIG. The ring gear 14 is formed to have a ring-shaped protrusion 22 on its side surface, and the ring gear is arranged in the storage portion 20 by loosely fitting the protrusion into the recess 24.

As can be seen from FIGS. 1 and 2, in the drive motor 12, for example, a pinion 26 that can mesh with the outer gear 14a of the ring gear is provided on the output shaft 12a, and the pinion and the outer gear are provided. The ring gear is linked to the drive of the drive motor by the meshing therebetween.

A DC motor is usually used as the drive motor 12, and the drive motor is drive-controlled by, for example, a motor control device (not shown) having an operation switch or the like. Note that the configuration, operation contents, etc. of such a motor control device will not be described in detail because they are not the gist of the present invention.

The output gears 16 (16-1 to 16-4) formed so as to be capable of meshing with the internal gear 14b of the ring gear are arranged inside the ring gear 14 at a plurality of positions separated from each other by a predetermined distance. .

Here, the output gears 16 are provided by the number corresponding to the drive mechanism of the seating posture control device mounted on the seat 28, for example.

For example, FIG. 4 illustrates a power seat 28 in which a seat slide device 30, a seat tilt device 32, and a reclining device 34 are mounted as a seating posture control device. In such a seat 28, in addition to the drive mechanism 30a of the seat slide device 30 and the drive mechanism 34a of the reclining device 34, the drive mechanism of the seat tilt device 32 includes a front drive mechanism 32a and a rear drive mechanism 32b. Since they are formed separately, there are four drive mechanisms in total, and four output gears are provided correspondingly (see FIG. 2).

Then, as shown in FIGS. 1 and 3, the output means 36 (36-1 to 36-4) is provided rotatably integrally with the output gear 16 (16-1 to 16-4), respectively. Has been.

As can be seen from FIG. 3, the output means 36 (36-1 to 36-4) is formed by, for example, a movable shaft 38 and an output shaft 40, and the movable shaft is attached to the output gear 16. It is attached so as to be rotatable in one body and movable in the axial direction. The movable shaft 38 and the output gear 16 are connected by, for example, a spline joint or the like.

Here, a clutch 42 is provided at the ends of the movable shaft 38 and the output shaft 40 that face each other. That is, the output shaft 40 can rotate integrally with the movable shaft only when the clutch 42 is engaged with the movement of the movable shaft 38 in the axial direction.

As shown in FIGS. 1 and 3, the movable shaft 38 is biased in the disengaging direction of the clutch 42 by the biasing force of the biasing means 44, for example. As the biasing means 44, for example, a compression coil spring can be used, and the compression coil spring is wound around the movable shaft 38 behind the output gear 16 (right side in the figure).

The end of the biasing means (compression coil spring) 44 is supported by a washer 45 or the like, and the movable shaft end is prevented from being separated from the movable shaft by caulking or the like.

In such a structure, the movable shaft 38 is normally biased in the direction in which the clutch 42 disengages, that is, in the direction in which the output gear 16 projects from the end, under the biasing force of the biasing means 44.

Then, as shown in FIGS. 1 and 3, a cam that engages with the end of the movable shaft 38 and can press the movable shaft against the biasing force of the biasing means 44 until the clutch 42 is engaged. Pieces 46-1 to 46-3 are provided on the cam plate 48. The cam pieces 46-1 to 46-3 are provided, for example, at three positions separated by a predetermined distance, and are arranged in a rotational direction so that the movable shaft 38 can be pressed by the rotational movement of the cam plate 48. Each terminal is formed as a slope.

The cam plate 48 is rotatably supported by a predetermined angle under the drive of the cam motor 50. As the cam motor 50, for example, a stepping motor can be used. Then, when the output shaft 50a of the cam motor is rotated forward or backward, the cam plate 48 is appropriately rotated in the corresponding direction to drive the movable shaft 38 to be pressed, that is, the driving motor 12. The cam motor 50 is configured such that the output means 36 (36-1 to 36-4) to which the force is transmitted is selected by any of the cam pieces 46-1 to 46-3.

The cam motor 50 is drive-controlled by, for example, an output signal from the motor control device, and the cam pieces 46-1 to 46-46-46-46-46- are driven by data or the like preset in a microcomputer or the like of the motor control device. Position 3 is adjusted.

The geared motor 10 as described above is assembled as shown in FIG. 5, and the output shaft 40 of the output means drives each device through the torque cables 52 (52-1 to 52-4) and the like. The mechanisms 30a, 32a, 32b and 34a are respectively connected (see FIG. 4).

For example, as shown in FIG. 3, when the movable shaft 38 of the output means 36-1 is pressed by the cam piece 46-1, the output shaft 40 rotates together with the movable shaft due to the engagement of the clutch 42. Be touched. That is, the driving force from the driving motor 12 is transmitted to the output shaft 40 of the output means 36-1 via the ring gear 14 and the output gear 16, and the rotational force thereof is transmitted via, for example, the torque cable 52-1. Is transmitted to the drive mechanism 30a, the front and rear position of the seat 28 is adjusted by the operation of the seat slide device 30.

Here, when the ring gear 14 is rotated by the drive of the drive motor 12, all of the output gears 16 (16-1 to 16-4) are rotated in association with the ring gear. However, since the clutch 42 is not coupled except for the output means 36-1 selected by the rotation of the cam plate 48 in accordance with the driving of the cam motor 50, the output of the output means 36-1 The driving force of the driving motor 12 is transmitted only to the shaft 40.

That is, according to the present invention, the output means 36 (36-1 to 36-36-36-36-36-36-36-36-36-36- 4) That is, the sitting posture control devices 30 to 34 can be selected.

As described above, in the geared motor 10 of the present invention, the seating posture control devices 30 to 34 mounted on the seat 28 individually operate under the drive of the single drive motor 12. It is possible. Therefore, it is not necessary to provide a geared motor for each seating posture control device, and the number of parts and weight can be reduced reliably.

By reducing the number of parts, it is possible to sufficiently simplify the overall configuration of the seat 28 and reduce both the parts cost and the product cost.

Further, in the present invention, one of the seating posture control devices 30 to 34 to be driven can be selected under the rotation of the cam plate 48 accompanying the driving of the cam motor 50, and thus the geared gear control device can be selected. The configuration of the motor itself does not become complicated, and the cost is sufficiently reduced in this respect as well.

Since it is not necessary to secure a space for the geared motor for each of the seating attitude control devices 30 to 34, it is possible to sufficiently prevent each device from increasing in size. Therefore, sufficient cushioning properties can be ensured for the seat 28 even at the location where each device is installed.

Here, in the embodiment, the geared motor 10 is embodied as a structure having four output gears 16 (16-1 to 16-4), but the number of output gears is not limited to this. Instead, it may be changed according to the number of seating posture control devices mounted on the seat 28.

Further, the cam plate 48 is illustrated as a configuration having three cam pieces 46-1 to 46-3, but it is sufficient if the movable shaft 40 for each output gear can be individually pressed and supported. Therefore, the number of cam pieces is not limited to this.

Further, although the cam motor 50 is embodied as a stepping motor, the present invention is not limited to this, and the cam motor may be formed from another motor, for example, a DC motor or the like.

However, when the cam motor 50 is formed from a DC motor or the like, a detection means or the like for detecting the rotation angle of the cam plate 48 is required. Therefore, if the cam motor 50 is formed from a stepping motor as in this embodiment, the position movement of the cam pieces 46-1 to 46-3 can be accurately performed under a preset rotation angle or the like. Therefore, the configuration can be simplified and the malfunction of the output means 36 can be reliably prevented.

In the embodiment, the pinion 26 of the drive motor 12 is meshed with the external gear 14a of the ring gear, and the output gear 16 (16-1 to 16-4) is meshed with the internal gear 14b. However, conversely, the pinion 26 of the drive motor 12 may be engaged with the internal gear 14b of the ring gear and the output gear 16 (16-1 to 16-4) may be engaged with the external gear 14a, respectively.

In the embodiment, the geared motor is used as a drive source of the power seat 28 of a passenger car or the like, but a geared motor mounted on the power seat is sufficient, and the invention is not limited to this. The geared motor of the present invention may be applied to seats for trains, airplanes, ships, etc. and seats for bean jam, hairdressing, etc.

Further, the geared motor of the present invention only needs to have a structure capable of transmitting the driving force of one driving motor to a plurality of places, so that a geared motor that is a driving source other than the power seat is The idea of this device can be applied.

The above-mentioned embodiments are for explaining the present invention, and do not limit the present invention in any way, and all the modifications and alterations made within the technical scope of the present invention are also applicable. It goes without saying that it is included in the invention.

[0046]

[Effect of device]

 As described above, according to the geared motor of the present invention, the seating posture control device mounted on the seat can be individually operated under the drive of one drive motor. Therefore, it is not necessary to dispose a geared motor for each seating posture control device, and the number of parts and weight can be surely reduced.

By reducing the number of parts, the overall structure of the seat can be sufficiently simplified, and both the parts cost and the product cost can be reduced.

Further, in the present invention, one of the output means to be driven can be selected under the rotation of the cam plate accompanying the driving of the cam motor, which complicates the structure of the geared motor itself. In this respect, too, the cost is sufficiently reduced.

Further, if the cam motor is a stepping motor, that is, since the position of the cam piece can be moved accurately, malfunction of the output means can be reliably prevented. Further, since the position detecting means for the cam piece can be omitted, the structure is not complicated.

Further, if the output gear and the movable shaft are connected by a spline joint, and the movable shaft is biased in the clutch separating direction under the biasing force of the biasing means, the rotation and movement of the movable shaft can be reliably obtained. At the same time, the clutch is prevented from being engaged except by the pressing by the cam piece, and in this respect also, malfunction of the output shaft can be reliably prevented.

If the movable shaft and the output shaft are connected by the clutch, the rotation of the output shaft when the clutch is connected and the disengagement of the clutch due to the movement of the movable shaft can be reliably obtained. Also, malfunction of the output shaft can be prevented.

[Brief description of drawings]

FIG. 1 is a schematic exploded perspective view of a geared motor according to the present invention.

2 is a cross-sectional view of the geared motor taken along the line AA of FIG.

3 is a cross-sectional view of the geared motor taken along the line BB of FIG.

FIG. 4 is a schematic side view of a seat on which a seating posture control device and a geared motor are mounted.

FIG. 5 is a schematic perspective view of a geared motor.

[Explanation of symbols]

 10 Geared motor 12 Drive motor 14 Ring gear 14a External gear 14b Internal gear 16 (16-1 to 16-4) Output gear 28 Seat 36 (36-1 to 36-4) Output means 38 Movable shaft 40 Output shaft 42 Clutch 44 Deflection Means 46-1 ~ 46-3 Cam Piece 48 Cam Plate 50 Cam Motor (Stepping Motor)

Claims (3)

[Scope of utility model registration request] 1. A single drive motor that is drive-controlled under a predetermined switch operation; a cam plate having a predetermined number of cam pieces; and a cam piece that rotates the cam plate by a corresponding angle. Motor for moving the position of; a ring gear that has an external gear and an internal gear and is rotatably supported, and one of the external gear and the internal gear meshes with the pinion of the drive motor; and the other of the ring gears. A plurality of output gears that are formed so as to be able to mesh with the gears; movable shafts that can rotate integrally with the output gears and that can move in the axial direction An output shaft that is rotatable in conjunction with the shaft and is provided for each output gear; and by rotating the cam plate when the cam motor is driven, any one of the output devices is provided. Only one movable axis Is pressed in the connecting direction of the clutch by arm piece, the geared motor only the output shaft of the connecting output means of the clutch is rotated in conjunction with driving of the drive motor. 2. The geared motor according to claim 1, wherein the cam motor is a stepping motor. 3. The geared motor according to claim 1, wherein the output gear and the movable shaft of the output means are connected by a spline joint, and the movable shaft is biased by the biasing means in a direction opposite to the coupling of the clutch. .