JPH07149173A - Multi-driving device of electrical equipment for vehicle - Google Patents

Abstract

PURPOSE:To minify difference of speed between movements in normal and reverse directions in a multi-driving device in which a nut member is relatively moved to an operation threaded shaft rotationally moving normally and reversely by providing a rotor adjacent to the nut body, and changing frictional resistance to be small at moving in the direction against gravity and to be large at moving in the direction following gravity. CONSTITUTION:A rotor 19 rotationally moving in one body with an operation threaded shaft 7 adjacent to a nut body 21 for elevatably moving a seat of which the upward movement is a movement against gravity and the downward movement is a movement following gravity is arranged on the side for downward moving a seat part, and when the seat part is upward moved in the direction against gravity, the nut 21 is moved in the condition of small frictional resistance against the rotor 19, and when the seat part is downward moved in the direction following gravity, the nut 21 receives frictional resistance from the rotor 19. Consequently magnitude of the frictional resistance is changed, hence difference of moving speed due to moving directions can be minified as small as possible, and the seat can be elevatably moved smoothly, surely, efficiently.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-driving device for electric components for vehicles such as private cars, buses and trucks.

[0002]

BACKGROUND OF THE INVENTION Generally,
In this type of vehicle, for example, like a seat (seat), each actuating part can be selectively adjusted according to the physique of the passenger, such as forward / backward movement, tilting of the backrest part, vertical movement of the seat part, etc. In order to selectively perform these plural operations by the ON-OFF operation of each corresponding switch using the single electric motor, the forward and reverse rotations are received by the power from the electric motor. A nut member that is interlockingly connected to the operating portion is screwed onto the operating screw shaft to be operated, and the nut member is moved relative to the operating screw shaft so that the alternative operating portion is operated. Has already been proposed.

By the way, some seats are designed to move back and forth by being guided by guide rails laid obliquely on the skeleton side so that they become lower as they move rearward. In this case, the seats are forward. To move to be lifted against gravity, on the contrary, to move backward, it will fall in a state of gravity. Also,
In the case of adjusting the height of the front and rear parts of the seat portion, in order to move it upward, it will be a movement against gravity, and to move it downward, it will follow gravity. In the case of moving in a direction opposite to the direction against, there is a problem that a difference in moving speed in each direction occurs, and the present invention provides a sheet driving device that can reduce the speed difference depending on the moving direction. It is provided.

[0004]

DISCLOSURE OF THE INVENTION The present invention was devised with the object of providing a multi-driving apparatus for a vehicle electrical component which can eliminate these drawbacks in view of the above circumstances. The nut member housed in the nut box is screwed onto the operation screw shaft that rotates forward and backward in response to the power from the electric motor for the operation of the operation part that performs an operation that follows the load and an operation that resists the load. In a multi-drive device for a vehicle electrical component configured to move relative to forward and backward rotation of an operating screw shaft, the nut member includes a nut body screwed to the operating screw shaft, and the nut. A plunger that is axially movable and that fits so as to rotate integrally in the axial direction, and a second receiving portion that is integrally provided on the nut box side and that is integrated with the plunger that has moved to the other axial direction. Adjacent to one side of the nut body First engagement that is integrally arranged with the actuating screw shaft and rotates integrally with the actuating screw shaft in the axial direction, but is freely movable in the axial direction, and the plunger moved to one side in the axial direction is integrated. A rotating body having a receiving portion, and clutch means for switching the plunger between a first shift state in which the plunger is integrated with the first engagement receiving portion and a second shift state in which the plunger is integrated with the second receiving portion are provided, Further, the nut member is axially mounted on the actuating screw shaft so that the direction in which the nut member operates against the load is set so as to move the nut body in the direction opposite to the rotating body.

According to the present invention, the frictional resistance of the nut body to the rotating body is reduced when the load is moved against the load, while the nut body is moved to the rotating body when the load is moved according to the structure. The frictional resistance is made relatively large so that the speed difference depending on the moving direction can be made as small as possible.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a first embodiment of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes a seat mounted on a vehicle such as a private car, and an electric drive device 2 embodying the present invention is provided below the seat 1,
The front-back movement of the seat and the height adjustment of the front portion and the rear portion of the seat portion can be selectively performed, and these three types of operations can be performed in the embodiment.

That is, the reduction gear mechanisms 5 and 6 provided at the left and right ends of the output shaft 4 protruding left and right from the electric motor 3 which constitutes the electric drive device 2 are integrally fixed to the lower surface of the seat 1. . Reference numerals 7 and 8 denote first and second actuating screw shafts. The actuating screw shafts 7 and 8 have a center line extending in the front-rear direction and a locking portion extending in the axial direction on the outer periphery (the present embodiment). In the example, it is chamfered on one side, but may be chamfered on two sides, and may be a groove or the like) 7a, 8a. The actuating screw shafts 7 and 8 are connected to the drive of the electric motor 3 and rotate about the shaft center.
Is rotatably supported on the shaft, and the front end of the shaft is connected to the reduction gear mechanisms 5 and 6, and is transmitted to the first and second operation screw shafts 7 and 8 in a state where the drive of the electric motor 3 is decelerated. It is configured to be. Furthermore, both actuating screw shafts 7 and 8 have
The first nut members 9 and 10 are respectively screwed, but the lower surfaces of the first and second nut members 9 and 10 are
The support 2a is integrally provided on the floor surface, and is set so as to move forward and backward relative to the operation screw shafts 7 and 8 based on the rotation of the operation screw shafts 7 and 8. Then, as will be described later, a clutch body (corresponding to the plunger of the present invention)
When 20 is set to the second shift position, the seat 1 is moved forward and backward by the forward and backward relative movement of the first nut members 9 and 10 with respect to the operation screw shafts 7 and 8 based on the rotation of the operation screw shafts 7 and 8. Is set to.

On the other hand, at the position on the front side of the first nut member 9 of the first actuating screw shaft 7 and the position on the rear side of the first nut member 10 of the second actuating screw shaft 8, the second Nut members 12 and 13 of the second nut members 12 and 13 are respectively screwed together, and when the clutch body 20 is set to the second shift position as described later, the second nut members 12 and 13 are moved based on the rotation of the operation screw shafts 7 and 8. It is adapted to move relative to the operating screw shafts 7 and 8 in the front-rear direction. The second nut members 12 and 13 are respectively connected to height adjusting mechanisms 16 and 17 arranged in front and rear of the seat 1 via connecting rods 14 and 15, respectively, and are connected to front and rear portions of the seat portion. It is configured to adjust the vertical height.

By the way, the first nut members 9 and 10 and the second nut members 12 and 13 provided on the first and second actuating screw shafts 7 and 8 respectively have the following constructions, which will be described later. The relative movement with respect to the actuating screw shafts 7 and 8 is set so as to be selectively switchable intermittently, but each of these nut members 9, 10, 12, and 13 has an electromagnetic clutch of the same construction incorporated therein. Therefore, for convenience, the configuration of the electromagnetic clutch of the first nut member 9 will be described below.

That is, the nut member 9 is a casing (corresponding to the nut box of the present invention) 18 having a through hole 18a penetrating through the actuating screw shaft 7 in a loosely fitted manner so that the nut member 9 is movable. The casing 18 is integrally fixed to the bottom portion of the seat 1, and a cylindrical rotating body (corresponding to the first engagement receiving portion of the present invention) 19 is slidable. It is decorated. This rotating body 19 is provided with an operating screw shaft 7
An engaging portion 19a that engages with the locking portion 7a formed on the inner side is provided on the inner cylindrical surface. When the operating screw shaft 7 rotates about its axis, the operating screw shaft 7 rotates integrally with the operating screw shaft 7. Since the shaft 7 penetrates loosely, the actuating screw shaft 7 does not move in the axial direction.
And are set to be free. Furthermore, the rotating body 1
On the outer periphery of the other side of 9, there is formed a first clutch receiving portion 19b which is disengageably engaged with a first clutch engaging portion 20a formed on a clutch body 20 described later. By the way, the rotating body 1
A nut body 21 is adjacent to the other side of 9 with a gap S (smaller than the play between the nut body and the operating screw shaft). The nut body 21 penetrates the operating screw shaft 7. Screwed into
A plurality of engagement grooves 21a facing the axial direction are engraved on the outer peripheral surface thereof.

The clutch body 20, which functions as a plunger of an electromagnetic clutch, has a cylindrical shape,
The other half is an inner cylinder having a small diameter, and the inner cylinder surface is engaged with the nut body engagement groove 21a so as to rotate integrally with the nut body engagement groove 21a in the axial direction, but engages so as to allow axial movement. 20b is formed. Further, one half of the clutch body 20 serves as a large-diameter inner cylindrical portion 20c, and the rotating body 19 is loosely fitted therein. Thus, when the clutch body 20 moves to one side as described later, The one end side portion of the body engagement receiving groove 20b is set so as to be removably engaged with and integrated with the first clutch receiving portion 19b formed on the rotating body 19, and thus the clutch body engagement is performed. The one end side portion of the receiving groove 20b is configured to be the first clutch engaging portion 20a.

On the other hand, a clutch receiver (corresponding to the second receiving portion of the present invention) 22 is provided on the other side of the casing 18, and the clutch receiver 22 is set so as to be integrated with the casing 18. Square plate-shaped flange 22a
Are formed integrally with each other at one end and the cylindrical portion 22b at the other end. Further, the clutch receiver 2
2, a large-diameter inner cylinder portion 22c into which the clutch body 20 is fitted.
Has a small-diameter inner cylindrical portion 22d into which the nut body 21 is loosely fitted on one end side.
Is formed on the other end side, but on the inner peripheral surface of the inner diameter portion of the large-diameter inner cylindrical portion 22c, the second clutch engaging portion 20d formed on the outer peripheral surface on the other end side of the clutch body 20 can be engaged and disengaged. An engageable second clutch receiving portion 22e is formed. Then, as will be described later, the clutch body 20 moves to the other end side, and the second clutch engaging portion 20d engages with the second clutch receiving portion 22e to be integrated, so that the clutch body 20 moves to the casing 18 With respect to the axial direction, it is integrated, which allows
Although the rotation of the clutch body 20 about the axis of the actuating screw shaft 7 is restricted, the clutch body 20 is provided so as to be freely movable in the axial direction.

On the other hand, 23 is a coil bobbin which is integrally incorporated in the casing 18 and around which an exciting coil 24 is wound. The coil bobbin 23 is such that the outer circumference of the clutch body 20 is slidable. Is fitted on.
Further, 25 is a yoke which is open on one side, and 26 is a yoke 2.
Although it is a yoke plate that closes the opening of 5, the clutch ammunition 27 is interposed between the yoke plate 26 and the step portion 20e formed in the clutch body 20. And
When the exciting coil 24 is in the non-energized state, the clutch body 20 receives the urging force of the clutch ammunition 27, and the first clutch engaging portion 20a on one end side is separated from the first clutch receiving portion 19b. , The second clutch engaging portion 20d on the other end side
Is located at a second shift position where it engages with the second clutch receiving portion 22e. On the other hand, when a switch (not shown) is operated to energize and excite the exciting coil 24, the clutch body 20 having a plunger function moves to one end side against the biasing force of the clutch ammunition 27, The first clutch engaging portion 20a on one end side engages with the first clutch receiving portion 19b, but the second clutch engaging portion 20d on the other end side is in a first shift position where it is separated from the second clutch receiving portion 22e. The clutch actuating means is configured in this manner. Then, when the actuating screw shaft 7 rotates in the state of being located in the first shift position, the clutch body 20 rotates integrally with the rotating body 19, but becomes free from the clutch receiving body 22. , Clutch body 20,
The rotating body 19 and the nut body 21 are integrally rotated (co-rotated) with the actuating screw shaft 7, and the seat 1 is in a non-moving state in which it does not move. On the other hand, when the actuating screw shaft 7 rotates in the state of being located at the second shift position, the clutch body 20 is free from the rotary body 19 but is integral with the clutch receiving body 22. The rotation of the sheet 1 is restricted, and the sheet 1 is moved by this.

In the electric drive unit 2 embodying the present invention, when the nut members 9, 10, 12, 13 are arranged on the actuating screw shafts 7, 8, the movement in the direction against gravity is prevented. The nut body 21 is arranged so as to move in a direction opposite to the rotating body 19, that is, the second clutch receiving portion 22e is located in a moving direction against gravity. That is, the nut members 9 and 10 operate when the operating screw shafts 7 and 8 rotate in the direction of moving the seat 1 forward and upward.
To move forward, in other words, move backward relative to the actuating screw shafts 7 and 8, where the nut members 9 and 10 are arranged such that the rotating body 19 is in the front side and the second clutch receiving The portion 22e has an arrangement structure in which it is located on the rear side and is incorporated in the actuating screw shafts 7 and 8. The third and fourth nut members 12 and 13 adjust the height of the seat 1 by moving back and forth, but the third nut member 12 moves forward with respect to the actuating screw shaft 7. Due to
The fourth nut member 13 is set to move upward in the front and rear portions of the seat 1 by moving rearward with respect to the actuating screw shaft 8.
As described above, since the operation of moving forward with respect to the operating screw shaft 7 is against gravity, the rotating body 19 is installed in the operating screw shaft 7 in a rearward arrangement structure. . On the other hand, the fourth nut member 13 has an arrangement structure in which the rotating body 19 is located on the rear side because the direction in which the fourth nut member 13 moves rearward with respect to the actuating screw shaft 7 is an action against gravity, and is incorporated in the actuating screw shaft 7. Has been.

In the embodiment of the present invention configured as described above, it is possible to adjust the front-rear position of the seat 1 or the front-rear height of the seat 1. For example, in the case of adjusting the front-side height of the seat 1. The energization of the exciting coil 24 provided in the third nut member 12 may be cut off so that the clutch body 20 is freed from the rotating body 19 and brought into a moving state in which the clutch body 20 is engaged with the clutch receiving body 22. Body 20
Co-rotation restriction with the operating screw shaft 7 of
When the seat 1 is adjusted in the front-rear height following the rotation of the operation screw shaft 7 associated with the forward and reverse driving of the electric motor 3, and when the front-rear position is adjusted, the first and second nut members 9, 10 are used. Is moved, and the other nut members 12 and 13 are made non-moving.

As described above, in the embodiment of the present invention, the front-rear position adjustment and the height adjustment of the seat 1 are automatically performed by the electric driving force, but these adjustments are selected. , The corresponding clutch actuating means can be selectively switched on and off, and accordingly, the drive control of the plurality of adjustment mechanisms can be performed by the drive from one electric motor, and the respective adjustments can be made. There is no need to provide a dedicated electric motor for the mechanism. As a result, these adjusting parts of the seat 1 are also widely used, the number of parts can be reduced, the device can be made lighter and more compact, and the simplification can be greatly contributed to simplifying the assembling work. The cost can also be reduced.

Further, in this example, the third nut member 12 for moving up and down the front portion of the seat portion of the seat 1 will be described as an example. When the rotating body 19 that rotates integrally is disposed on the side that moves the seat seat portion downward, and the seat seat portion moves in a direction against gravity, that is, when the seat seat portion moves upward, the nut body 21 moves When the seat seat moves in a direction that follows gravity, that is, when the seat seat moves downward, that is, the nut body 21
Receives frictional resistance with the rotating body 19. Therefore, the magnitude of the frictional resistance of the rotating body 19 received by the nut body 21 changes depending on the movement of the seat portion in the direction in which gravity is followed and the movement in the opposite direction. The difference can be as small as possible. As a result, like the case where the third nut member 12 is arranged in the opposite manner, the movement against gravity is prevented from occurring.
It is possible to smoothly and reliably raise and lower the seat seat portion efficiently without increasing the difference in speed depending on the moving direction due to the movement on the side where the frictional resistance with the rotating body 19 increases. By the way, the same can be said in the case of raising and lowering the rear portion of the seat portion and raising and lowering due to the front-back movement of the entire seat. Although it becomes small according to the angle, it is still the one that can exhibit the above-mentioned corresponding effects.

Further, in this structure, the seat 1 is moved back and forth so that the operating screw shafts 7 and 8 are integrally provided on the seat 1, and the nut member 9 screwed to the operating screw shafts 7 and 8.
10 is provided on the body side, and the driving screw shafts 7 and 8 move integrally with the seat 1 in association with the driving of the motor.
The nut members 9 and 10 are set to move relative to the actuating screw shafts 7 and 8, and the nut members 9 and 10 are provided with the rotating body 19 on the front side. It is configured to. As a result, the vehicle in which the device is mounted receives a shocking inertia when a frontal collision occurs, whereby the nut body 21 is actuated by a load that tends to inertially move the seat 1 forward. Although the shafts 7 and 8 are to be rotated to this side, the nut body 21 receiving a forward load is in a state of sandwiching and pressing the rotating body 19 between the rotating body 19 and the casing 18. Since the rotation resistance of the seat becomes extremely large, the rotation of the actuating screw shafts 7 and 8 in the direction of moving the seat 1 forward is restricted, and the seat suddenly pops out forward. Can be effectively avoided. Also, the clutch body 20
The front rotating body 19 receives the shocking inertia.
It moves to the side and engages with the first clutch receiving portion 19b. In such a case, the nut body 21 that receives a load that tries to rotate the actuation screw shafts 7 and 8 is set to rotate integrally with the actuation screw shafts 7 and 8 in the axial direction. 1
9 will be integrated through the clutch body 20,
As a result, the rotation of the operating screw shafts 7 and 8 in the direction in which the seat 1 is moved forward is restricted,
This is convenient because it is possible to effectively avoid the problem that the seat 1 suddenly jumps forward.

On the other hand, the arrangement configuration of the electric drive device using such a nut member and the actuating screw shaft is not limited to that of the first embodiment, and for example, one of the two actuating screw shafts 7 as shown in FIG. Is provided with a nut member 9 for controlling the longitudinal movement, and the other operating screw shaft 7 is provided with nut members 12, 1 for controlling the longitudinal height.
3, the three operating screw shafts 7 are provided, and nut members 12 and 13 for controlling the front-rear height of the operating screw shaft 7 located at the center are provided as shown in FIG. Various arrangements can be adopted, such as the arrangement in which each of the operation screw shafts 7, 7 located on both sides is provided with the nut members 9, 10 for controlling the forward and backward movement, respectively. In some cases, there is an advantage that the operating screw shaft can be made shorter than that of the first embodiment.

The present invention is not limited to the first embodiment described above, and the structure of the nut member may be the same as that of the second embodiment shown in FIG. Since the casing and the clutch receiving portion are integrally formed, the axial compactification of the nut member is further achieved.

Further, the structure of the nut member is as shown in FIG.
As in the third embodiment shown in FIG. 0, the plunger may be pressed against the inner surface of the other side of the casing without providing a clutch receiver as the second receiver of the plunger. That is, the casing 18 is made of a magnetic material, and the nut body 21 and the rotating body 19 are provided adjacent to the casing 18, and the nut body 21 rotates around the axis of the nut body 21. The clutch body 20 is externally fitted in a state in which the movement is integrated and free to move in the axial direction, but the other half of the clutch body 20 has a large-diameter inner cylindrical shape. A clutch ammunition 27 is provided between the bottom of the cylinder and the inner surface of the casing 18 on the other side. Then, in the first shift state in which the clutch body 20 is positioned on the side of the rotating body 19 without the excitation of the exciting coil 24, the engagement receiving groove 20a formed on the inner peripheral surface on one side has the first receiving groove 20a of the rotating body 19. The casing 18 is formed so as to rotate integrally with the engagement receiving portion 19b, but when the exciting coil 24 is excited, the clutch body 20 serves as an exciting iron core and is magnetized.
It is relatively attracted to the inner surface of the other side, whereby the clutch body 20 is pressed into contact with the casing 18 and integrated to form the second shift state. With this, it is not necessary to separately provide the second receiving portion, and the number of parts can be reduced. Further, since the nut member is arranged on the actuating screw shaft so that the nut body 21 is on the side receiving the load, the load ensures the pressure contact between the inner side surface on the other side of the casing and the clutch body to be more reliable. In addition, there is no problem even if the integration is not the engagement as in the first and second embodiments.

[0022]

In summary, since the present invention is constructed as described above, a plurality of movement adjustments such as front and rear position adjustments of the seat can be performed by first engaging the plungers in the corresponding nut members. The clutch means may be used to switch between engagement with the receiving portion and engagement with the second receiving portion.
As a result, a plurality of multi-position adjustments can be performed from one electric motor, and it is not necessary to provide corresponding electric motors, the number of parts can be reduced, and the weight and size can be effectively reduced.

Further, in this structure, the rotating body adjacent to the nut body is arranged on the actuating screw shaft so as to be arranged at the position opposite to the moving direction side against gravity. When moving in the direction against gravity, the nut body moves with a small frictional resistance with the rotating body, while when moving in a direction that follows gravity, the nut body moves in frictional resistance with the rotating body. As a result, the magnitude of the frictional resistance with which the nut body receives the rotating body can be changed by the movement in the direction that follows gravity and the movement in the direction that resists gravity. As a result, the difference in moving speed caused by the moving direction is made as small as possible, and the frictional resistance acts largely when moving against gravity, as in the case where the nut body and the rotating body are arranged in reverse. As a result, the speed difference due to the moving direction does not become larger, and the seat seat can be smoothly and reliably moved up and down efficiently.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of a seat.

FIG. 2 is a schematic explanatory view showing an electric seat moving device.

FIG. 3 is a partially cutaway perspective view of a nut member.

FIG. 4 is an exploded perspective view of a nut member.

FIG. 5 is a schematic cross-sectional view showing a moving state of a nut member.

FIG. 6 is a schematic cross-sectional view showing a non-moving state of a nut member.

FIG. 7 is a schematic view showing another example of the arrangement configuration of the electric drive device.

FIG. 8 is a schematic view showing another example of the arrangement configuration of the electric drive device.

FIG. 9 is a schematic sectional view showing a nut member of a second embodiment.

FIG. 10 is a schematic explanatory sectional view showing a nut member of a third embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 seat 3 electric motor 7 1st operation screw shaft 9 1st nut member 12 2nd nut member 19 rotating body 19b 1st clutch receiving part 20 clutch body 20a 1st clutch engaging part 20d 2nd clutch engaging part 21 nut body 22 clutch receiver 22e second clutch receiver 24 exciting coil 27 clutch ammunition

Claims (5)

[Claims] Claim: What is claimed is: 1. An operation of an operation portion that performs an operation conforming to a load and an operation that opposes a load is screwed onto an operation screw shaft that rotates forward and backward in response to power from an electric motor and is housed in a nut box. In a multi-driving apparatus for a vehicle electrical component, wherein the nut member is configured to move relative to the actuating screw shaft in the forward and reverse directions, the nut member is a nut body screwed to the actuating screw shaft. A plunger that is fitted in the nut body so as to be axially movable and integrally rotatable in the direction around the axis; and a plunger that is integrally provided on the nut box side and that is moved to the other side in the axial direction is integrated. The two receiving portions are arranged adjacent to one side of the nut body, and are fitted integrally with the actuating screw shaft in an axially rotating direction but freely movable in an axial direction,
And a rotary body having a first engaging receiving portion with which the plunger moved to one side in the axial direction is integrated, a first shift state in which the plunger is integrated with the first engaging receiving portion, and an integrated second receiving portion The clutch means for switching to the second shift state is provided, and the direction in which the operation of resisting the load of the nut member is performed is set so as to move the nut body in the direction opposite to the rotating body. A multi-drive device for a vehicle electrical component, which is mounted on a screw shaft. 2. The clutch means according to claim 1, wherein the clutch means urges the plunger toward the side for engaging the second receiving portion, and the plunger receives the plunger for the first engagement against the return ammunition. A multi-driving device for an electric component for a vehicle, comprising: an exciting coil that is moved to a side that engages with the portion. 3. The clutch means according to claim 1, wherein the clutch means urges the plunger toward the side that engages with the first engagement receiving portion, and the second receiving means receives the plunger against the return ammunition. A multi-driving device for an electric component for a vehicle, comprising: an exciting coil that is moved to a side that engages with the portion. 4. The multi-driving device for a vehicle electrical component according to claim 1, wherein the second receiving portion and the plunger are integrated by a detachable engagement. 5. The second receiving portion is the inner surface on the other side of the nut box according to claim 1, and the plunger integrated with the plunger is magnetized by exciting the exciting coil. A multi-driving device for electric components for a vehicle, wherein the nut box is configured to be sucked relative to the other inner surface of the nut box.