JPS63199138A - Driving device in power seat unit for automobile - Google Patents

Abstract

PURPOSE:To realize a low cost, by driving and regulating a sliding device and a reclining device with a single motor through a differential gear. CONSTITUTION:At a rotary plate 17 installed to a shaft 16a of a motor 16, three pinions 18 are furnished, which are engaged with a gear 20 of a sliding side driving shaft 19 and with the inner side gear 15a of a gear wheel 15. And to the outer side gear 15b of the gear wheel 15, a gear 13a of a reclining side driving shaft 13 is engaged. Therefore, even though the reclining side A is locked when the motor 16 is driven, the pinions 18 are rotated around the inner side gear 15a, because the gear wheel 15 is as it is fixed, and the gear 20 and the sliding side driving shaft 19 are rotated to drive the sliding mechanism. When the sliding side is locked, the gear 20 is fixed, the gear wheel 15 is rotated by the rotations of the pinions 18, the gear 13a and a reclining side driving shaft 13 are rotated, and the reclining mechanism is driven. Therefore, the sliding mechanism and the reclining mechanism can be operated separately by a single motor.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a drive device for driving a slide device and a reclining device using one motor in a power seat device for an automobile.

[Prior Art and Problems to be Solved by the Invention] When using a motor to adjust an automobile seat, it is known that a motor is provided for each adjustment device and adjustment is performed by each motor.

However, if this motor is used for each adjustment device, the number of motor cylinders used will increase and the cost will be high, so it was only used in luxury cars and was not designed to be installed in general cars.

[Means for solving problems]

The present invention was devised in order to eliminate this problem in view of the above circumstances, and includes a slide device consisting of a fixed rail fixed to the floor, a movable rail that moves along the fixed rail, and a sliding device on the movable rail. In a power seat device for an automobile that has a reclining device provided at one end and can be adjusted by driving a motor, the reclining device and the sliding device have a drive mechanism that drives the reclining device and the sliding device, which is a small One of the reclining devices is operated by a differential gear mechanism consisting of a gear, an internal tooth of the gear with external teeth and internal teeth that mesh with the small gear, and a gear provided on the slide drive shaft coaxial with the motor shaft. , connected to a reclining drive shaft having a gear that meshes with the external teeth of the gear, and the other slide device screwing the slide drive shaft through the gear to a feed screw shaft supported along a fixed rail. , a power seat for an automobile characterized in that the movable rail is attached to a rotary shaft that drives a gear of a speed reduction mechanism attached to a plate through a gear, and each of the devices is provided with a locking mechanism that can be locked and unlocked. This is a drive device for the device, which uses a single motor to transmit and adjust the reclining device and seat slide device by selecting and releasing the lock mechanism provided on each device, and adjusting the reclining device and seat slide device to the selected device. The purpose is to reduce costs by simplifying the design and sharing one motor, so that it can be installed in general public vehicles.

〔Example〕

Next, a drive device in an automobile power seat device according to the present invention.

Reference numeral 1 denotes a fixed rail with a substantially U-shaped cross section, and the mountings provided at both ends are arranged in parallel to the left and right through brackets 2. Reference numeral 3 denotes a movable rail having a substantially inverted U-shaped cross section, and is fitted to the fixed rail 1 so as to be slidable back and forth with rollers and balls interposed therebetween.

A suitable locking means 4 is provided between the movable rail 3 and the fixed rail 1, and the locking or unlocking is performed using an operating rod 5. A plate 7 is attached to the upper end of one end of the movable rail 3 to which the fixing bracket 6 of the reclining A is fixed, and the plate 7 is provided with an integrated overhanging portion 7a extending inward at each opposing edge. .

The end of the fixed bracket 6 has a shaft 8 provided with an eccentric shaft portion.
The movable bracket 9 is connected to the movable bracket 9 by the rotation of the shaft 8, and the movable bracket 8 is connected by a conventionally known differential gear mechanism via the eccentric shaft part.
Adjust the tilt.

Rotation of the shaft 8 is transmitted by a pair of gears such as a bevel gear within a case 10 attached to the backrest.

Further, [5] The housing 10 is integrally connected to a housing 12 via a bearing tube 11, and the output shaft of a reduction mechanism consisting of a worm wheel and a worm built into the housing 12 is supported by the bearing tube 11. Worm shaft (reclining side l drive shaft) 1
3 is provided with a pinion 13a at one end, and meshes with the external teeth 15b of a gear 15, which is provided with internal teeth 15a and external teeth 15b and constitutes a differential gear mechanism in the case 14, and furthermore, the internal teeth 15a are connected to the case 14.
The pinion 18 meshes with three small gears 18 which are supported by a rotary plate 17 mounted on a shaft 16a from a motor 16 attached to the motor 16, and the small gears 18 are connected to the slide side drive shaft 1 on the same line as the motor shaft 16a.
When the gear 15 is in a fixed state by meshing with the gear 2o provided in the gear 9, it is decelerated to give rotation to the slide side drive shaft 19, and when the slide side drive shaft 19 is in a fixed state, the small tooth Ill l
3, the gear 15 is decelerated and regenerated.

The slide-side drive shaft 19 has a gear 21 at its end, has a built-in deceleration mechanism consisting of a worm and a worm wheel screwed onto a feed screw shaft 22 that extends horizontally in the front-rear direction of the fixed rail 1, and has a gear 21 on the movable rail side. The installed mounting is on the overhanging part 7 of the plate 7.
Gear 2 provided on the worm shaft 24 of the case 23 attached to a
5, the movable rail 3 is moved back and forth along the feed screw shaft 22 by rotation of the worm shaft 24 to perform adjustment. The reclining device A includes a locking device 26.
is provided so that it can be engaged and disengaged by appropriate means.

[Function] As is clear from the above configuration, the locking device provided on the slide and reclining side is normally in a locked state, and furthermore, the locking device provided on the slide and reclining side is in a locked state, and furthermore, the locking device provided on the slide and reclining side is in a locked state, and moreover, The pinion 18 remains in constant mesh with the internal gear 15a of the gear 15 and the gear 20 of the slide drive shaft 19. To adjust the slide device now, use the operating rod 5 of the lock device on the slide side. When the lock is released, the movable rail 3 becomes free, and at the same time, when a forward/reverse or reverse voltage is supplied to the motor 16, the reclining device ifA remains locked.
5 is in a fixed state, and the motor 16 rotates the gear 20 of the slide side drive shaft 19 while the pinion 18 is rotated by the internal gear 15a, and this rotation is transmitted to the worm shaft 24 via the gear 21 and the gear 25. The movable rail 3 is moved back and forth along the fixed rail 1 for adjustment by rotating a worm wheel screwed onto the feed screw shaft 22 in the case 23 by the worm. Similarly, when adjusting the reclining device A, the slide side is locked, and when the lock of the reclining device A is released, the drive is transmitted only in the direction of the reclining device, and the reclining device is adjusted.

〔effect〕

The present invention comprises a slide device consisting of a fixed rail fixed to the floor and a movable rail that moves along the fixed rail as described above, and a reclining device provided at one end of the movable rail, and is adjusted by driving a motor. In the automobile power seat device, the reclining device and the sliding device have a drive mechanism that drives them.
A differential gear consisting of a small gear arranged on a rotary plate rotated by a motor, an internal tooth of a gear with external and internal teeth that mesh with the small gear, and a gear provided on a slide drive shaft on the same axis as the motor shaft. Through the dynamic gear mechanism, one reclining device is linked to a reclining drive shaft having a gear that meshes with the external teeth of the gear, and the other sliding device connects the slide drive shaft along the fixed rail through the gear. The movable rail is screwed onto the bearing feed screw shaft, and the movable rail is connected via the gear to the rotating shaft that drives the gear of the reduction mechanism attached to the plate.
Furthermore, each of the above-mentioned devices is a drive device for an automobile power seat device characterized by being provided with a locking mechanism that can be locked and unlocked. The drive shaft that operates with the diameter of the reclining device can easily adjust the tilting angle of the backrest or adjust the sliding device. That is, the operation can be simplified and the cost can be lowered by sharing one motor, making it possible to use it in general public vehicles.

[Brief explanation of the drawing]

The drawings show an embodiment of a drive device in an automobile power seat device according to the present invention, and FIG. 1 is a perspective view;
FIG. 2 is an exploded view of a drive unit including a motor and a differential gear mechanism. 1...Fixed rail, 2...Bracket for installation, 3.
...Movable rail, 4...Lock means, 5...Operation rod. 6... Fixed bracket, 7... Mounting plate, 7a...
・Protruding portion, 8... Axis, 9... Movable bracket, 10
゜12.14... Housing, 11... Bearing tube, 13...
- Worm shaft, 13a... Pinion, 15... Gear, 15a... Internal teeth, 15b... External teeth, 16... Motor, 16J1... Motor shaft, 17... Rotating plate, 1
8... Small gear, 19... Slide side drive shaft, 20.
21...Gear. 22... Feed screw shaft, 23... Case, 24... Worm shaft, 25... Gear, 26... Lock device, A
・・・Reclining device

Claims (1)

[Claims] A power seat device for an automobile, which includes a sliding device consisting of a fixed rail fixed to the floor, a movable rail that moves along the fixed rail, and a reclining device provided at one end of the movable rail, and can be adjusted by driving a motor. In the reclining device and the sliding device,
The drive mechanism that drives this consists of a small gear arranged on a rotary plate rotated by a motor, an internal tooth of a gear with external and internal teeth that mesh with the small gear, and a slide drive on the same axis as the motor shaft. A differential gear mechanism consisting of gears provided on the shaft connects one reclining device to a reclining drive shaft having a gear that meshes with the external teeth of the gear, and the other slide device connects the sliding drive shaft to the gear. The device is screwed onto a feed screw shaft bearing along the fixed rail, and linked via the gear to a rotary shaft that drives the gear of the reduction mechanism attached to the mounting plate of the movable rail, and each of the above devices is locked. and a drive device for a power seat device for an automobile, characterized by being provided with a locking mechanism that can be released.