JPH0144353Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to an improvement of a power seat for an automobile.

(Prior Art) Conventionally, various so-called power seats have been proposed for automobile seats, which are motor-driven to slide the seat bottom, lift the front and rear portions of the seat bottom, and twist the seat back. ing.

By the way, in a power seat that has two independent seat adjustment parts, such as two adjacent seat bottom slides, a seat back nut and seat bottom slide, and a seat bottom front and rear lift, Since a dedicated motor was required for each seat adjustment section, space for two motors had to be secured within the narrow seat, and since two motors were required, the cost was high. It was hot.

(Purpose of the invention) The present invention is a power seat in which two seat adjustment parts can be driven independently with one motor, which is advantageous in terms of assembly space and cost. .

(Structure of the invention) For this reason, the present invention has two independent seat positions, such as sliding the two adjacent seat bottoms, sliding the seat back nut and seat bottom, and lifting the front and rear of the seat bottom. In a power seat having an adjustment section, a first gear has internal teeth that mesh with an external tooth that drives one seat adjustment section and a planetary gear, and a first gear that meshes with an external tooth that drives the other seat adjustment section and a planetary gear. A second gear having internal teeth is provided so as to be switchable coaxially and axially, and a pinion of the motor meshes with either one of the planetary gears of the switched first or second gear. while the first
and a solenoid having a plunger that simultaneously switches and moves the second gear.

(Effects of the invention) According to the invention, the first and second gears are switched and moved relative to the pinion of the motor by excitation and demagnetization of the solenoid.
It becomes possible to drive two seat adjustment parts independently with one motor.

Therefore, since only one motor needs to be assembled within a narrow seat, the assembly space can be reduced, and since only one motor is required, the motor cost can be reduced. In addition, the solenoid only switches and moves the first and second gears, and the switching itself is done by meshing the pinion with the planetary gears of the first and second gears, so a large transmission force can be obtained, allowing the seat bottom to slide and move. You can do lifts, seatbacks, etc. with ease.

Furthermore, since the switching mechanism is built into the planetary gear reducer and switched on the output side of the reducer, there is no need to provide a reducer for each seat adjustment section, resulting in a compact configuration with fewer parts.
The weight is light and the cost is low.

(Example) As shown in FIGS. 1 and 2, the seat driving device 1 includes a casing 2, and one motor 3 is fixed to one side inside the casing 2. A pinion 5 located on the other side of the casing 2 is attached to the output shaft 4 .

On the other side inside the casing 2, there is a first gear 6 which has internal teeth 6a and external teeth 6b and is fitted to the output shaft 4 of the motor 3 so as to be movable in the axial direction. A second gear 7 is provided which has pitched internal teeth 7a and external teeth 7b and is fitted to a shaft 8 coaxially fixed to the output shaft 4 of the motor 3 in the casing 2 so as to be movable in the axial direction. There is.

A first output gear 11 to which a first drive shaft 10 of a first seat adjustment section 9 is connected is meshed with the external teeth 6b of the first gear 6 on the lower side inside the casing 2, and A second output gear 14 to which the second drive shaft 13 of the second seat adjustment section 12 is connected is meshed with the teeth 7b.

Three planetary gears 15,..., 15 are interposed between the internal teeth 6a of the first gear 6 and the pinion 5,
Between the internal teeth 7a of the second gear 7 and the pinion 5,
Three planetary gears 16, . . . , 16, which are integrated with the planetary gears 15, . . . , 15 and have one different number of teeth, are interposed. Planetary gears 15,...,15 and 16,...,16
are rotatably supported by shafts (not shown) on the disk portions of the first and second gears, respectively, with an interval of 120 degrees with respect to the shaft center. Therefore, first,
When the second gears 6 and 7 are simultaneously moved to the left in the figure, the pinion 5 meshes with the planetary gear 15 on the first gear 6 side, and the first and second gears 6 and 7 are simultaneously moved to the right in the figure. When the pinion 5 is
It meshes with the planetary gear 16 on the gear 7 side.

On the other hand, a solenoid 18 is fixed above the motor 3 in the casing 2, and a plunger 19 of the solenoid 18 is fitted alternately into the detent holes 6d and 7d of the first and second gears 6 and 7. A chuck plate 20 having mating pawls 20a and 20b is provided, and the plunger 18 is biased by a coil spring 21 in a projecting direction that moves the first and second gears 6 and 7 to the left in the figure. Therefore, in the seat driving device 1, when the solenoid 18 is demagnetized, the plunger 19 is projected by the biasing force of the coil spring 21, the pawl 20a of the chuck plate 20 is fitted into the detent hole 6d, and the first and second gears 6, 7 are simultaneously switched and moved to the left side in the figure, the pinion 5 of the motor 3 meshes with the planetary gear 15 on the first gear 6 side, so that the motor 3
By driving the pinion 5, the planetary gears 15, 1
6, second gear 7, second output gear 14
The drive shaft 13 comes to be driven.

Further, when the solenoid 18 is energized, the plunger 19 is retracted against the biasing force of the coil spring 21, and the claw 20b of the chuck plate 20 is inserted into the detent hole 7d.
As the pinion 5 of the motor 3 meshes with the planetary gear 16 on the second gear 7 side, the pinion 5 is engaged with the planetary gear 16 on the second gear 7 side. 5, planetary gear 16,
15, the first drive shaft 10 is driven via the first gear 6 and the first output gear 11.

(1) An embodiment in which the seat drive device 1 is applied to sliders on the left and right seat bottoms of the rear seat.

As shown in FIGS. 3a and 3b, the seat bottoms 27 and 28 of the rear seat 26 are connected to lower rails 29a and 29b fixed to the vehicle floor, respectively.
Atsupa rail 31 guided by 30a and 30b
While supported by a, 31b, 32a, 32b,
Each top rail 31a to 32b has a screw shaft 33.
a, 33b, 34a, 34b are provided, and each screw shaft 33a to 34b is provided with a worm wheel 35a, 3
5b, 36a, 36b are screwed together, and each worm foil 35a to 36b has a worm 37a, 37
b, 38a, 38b are engaged, and the worms 37a, 37b of the right seat bottom 27 are connected to the first drive shaft 10.
The worms 38a and 38b of the left seat bottom 28 are also connected to the second drive shaft 13.

Therefore, when the solenoid 18 of the seat driving device 1 is demagnetized, the second drive shaft 13 is driven as described above, so that the worms 38a, 38b, the worm wheels 36a, 36b, and the screw shafts 34a, 34b are driven.
As a result, only the left seat bottom 28 is slid back and forth, while when the solenoid 18 is energized, the first
Since the drive shaft 10 is driven, the worms 37a,
37b, worm wheels 35a, 35b, and screw shafts 33a, 33b, only the right seat bottom 27 can be moved back and forth.

(2) An embodiment in which the seat driving device 1 is applied to the seat back knuckle and the seat bottom slider of the front seat.

As shown in FIG. 4, the seat bottom 41 of the front seat 40 is supported by an upper rail 43 that is guided by a lower rail 42 fixed to the vehicle floor, and a bracket 45 of the seat back 44 is attached to the seat bottom 41 with a hinge shaft. The first drive shaft 10 and the second drive shaft 13 are formed into threaded shafts, and a threaded bracket 47 is screwed onto the first drive shaft 10. is connected to a bracket 48 at the front of the lower rail 42 by a first link lever 49, and a screw bracket 5 is connected to the second drive shaft 13.
The threaded bracket 50 is connected to the bracket 45 of the seat bag 44 by a second link lever 51.

Therefore, when the solenoid 18 of the seat driving device 1 is demagnetized, the second drive shaft 13 is driven as described above, so that only the seat back 44 is knuckled back and forth by the screw bracket 50, the second link lever 51, and the bracket 45. On the other hand, since the first drive shaft 10 is driven when the solenoid 18 is energized, the screw bracket 47 and the second link lever 49
As a result, only the seat bottom 41 can be slid back and forth.

(3) An embodiment in which the seat driving device 1 is applied to the front and rear lifters of the seat back of the front seat.

As shown in FIG. 5, the seat bottom 41 of the front seat 40 is supported by an upper rail 43 guided by a lower rail 42 fixed to the vehicle floor, and a bracket 45 of the seat back 44 is fixed to the seat bottom 41. on the other hand,
The first drive shaft 10 and the second drive shaft 13 are formed into threaded shafts, and the first drive shaft 10 has a threaded bracket 47.
The screw bracket 47 is connected by a first link lever 54 to a pair of links 53a and 53b pivoted to the front part of the upper rail 43 and the seat bottom 41, respectively, and the second drive shaft 13
A screw bracket 50 is screwed into the screw bracket 50, and the screw bracket 50 has a pair of links 55 pivotally connected to the upper rail 43 and the rear of the seat bottom 41, respectively.
a, 55b and are connected by a second link lever 56.

Therefore, when the solenoid 18 of the seat driving device 1 is demagnetized, the second drive shaft 13 is driven as described above, so that the seat bottom 41 is While only the rear part is lifted up and down, when the solenoid 18 is energized, the first drive shaft 1
0 is driven, the screw bracket 47, the first
Only the front portion of the seat bottom 41 can be lifted up and down by the link lever 54 and the links 53a and 53b.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional view of the seat drive device for a power seat according to the present invention, Fig. 2 is a front view showing the gears in Fig. 1, Fig. 3a is a perspective view of the rear seat, and Fig. 3b is the third Figure a is a perspective view of the slider portion, and Figures 4 and 5 are side views of the front seat. 1... Seat drive device, 3... Motor, 4...
Output shaft, 5... pinion, 6... first gear, 7...
...Second gear, 9...First seat adjustment section, 10...
First drive shaft, 12... Second seat adjustment section, 13...
...Second drive shaft, 18...Solenoid, 19...Plunger, 21...Coil spring, 26...Rear seat, 27, 28...Seat bottom, 40...Front seat, 41...Seat bottom, 44...
Seatback.

Claims (1)

[Claims for Utility Model Registration] Two adjacent seat bottom slides, a seat back nut and a seat bottom slide,
In a power seat that has two independent seat adjustment parts, such as a lift at the front and rear of the seat bottom, a power seat has external teeth that drive one seat adjustment part and internal teeth that mesh with a planetary gear. A second gear, which has a first gear and internal teeth in which the planetary gear meshes with external teeth that drive the other seat adjustment part, is provided so as to be able to switch coaxially and in the axial direction, and a pinion of the motor is configured to switch. A vehicle for an automobile, characterized in that a solenoid is provided with a plunger that is provided to mesh with either one of the planetary gears of the moved first gear or the second gear, and that simultaneously switches and moves the first and second gears. Power seat.