JP2589268Y2 - Magnetic path structure of multi-drive system for vehicle electrical components - Google Patents

Description

[Detailed description of the invention]

[0001]

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

[0002]

2. Description of the Related Art
In this type of vehicle, for example, like a seat (seat), each operating part can be selectively adjusted according to the physique of the occupant, such as forward and backward movement, up and down movement of a backrest part, vertical movement of a seat part, and the like. There is something like that. In this case, in the case where each of the operating sections is operated by using an independent electric motor, there is a problem that the number of parts increases and the size of the seat itself increases.

[0003] Therefore, it has been attempted to use a single electric motor to selectively perform a plurality of these operations by ON / OFF operations of corresponding switches. Therefore, power from the electric motor is received. The operating screw shaft that rotates forward and reverse
It has already been proposed that a nut member connected to the operating portion is screwed and the nut member is relatively moved with respect to the operating screw shaft so that the alternative operating portion is operated. . And a plunger fitted in the casing so as to be screwed to the operating screw shaft, and to be fitted in the nut body so as to be movable in the axial direction and to rotate integrally with the nut in the direction around the axis.
A return elastic machine for moving the plunger to the other side in the axial direction;
The excitation coil, which is fitted on the plunger and forcibly moves the plunger to one side in the axial direction against the return elastic machine, and the integral rotation of the operating screw shaft in the direction around the axis is regulated, and moves to the other side in the axial direction. The second plunger engages with the second engagement receiving body, and is rotatably fitted in the axial direction with respect to the operating screw shaft, but is freely movable in the axial direction, and has moved to one side in the axial direction. A clutch means comprising a first engagement receiving body with which the plunger is engaged is provided, wherein the exciting coil is in a non-excited state and the plunger moves to the other side in the axial direction. When engaged with the two engagement receivers, the nut body, the plunger, and the second engagement receiver on the casing side are integrated, whereby the nut member is moved with respect to the rotating operation screw shaft. The operation unit is operated by relative movement.

It is necessary to form a magnetic path based on the excitation of the exciting coil in the nut member configured as described above. The magnetic path is formed from one side in the axial direction of the exciting coil to the other side through the outer periphery. The yoke was provided so as to reach. However, in this case, the yoke is interposed between the exciting coil and the casing, and the casing becomes inevitably larger due to the interior of the yoke, resulting in a reduction in weight, size, and cost. Is one of the factors that hinder the achievement of

[0005]

SUMMARY OF THE INVENTION In view of the above circumstances, the present invention has been made to provide a magnetic path structure of a multi-drive device of a vehicle electrical component which can eliminate these disadvantages. A nut member screwed on an operation screw shaft that rotates forward and reverse in response to the power from the electric motor and relatively moves along with the forward and reverse rotation of the operation screw shaft, thereby operating the operation portion. In the multi-drive device for a vehicle electrical component, the nut member is screwed to an operating screw shaft, and the nut member is axially movable with respect to the nut member so as to be rotatable around the axis. A plunger externally fitted to the nut body so as to rotate integrally, a return elastic machine for moving the plunger to the other side in the axial direction, an exciting coil slidably fitted externally to the outer periphery of the plunger, operation The integral rotation around the axis with the screw shaft is regulated, A second engagement receiving body to which the plunger moved to the other side engages, and which are integrally rotated around the axis with respect to the operating screw shaft but are freely movable in the axial direction, and Clutch means comprising a first engagement receiving body with which the plunger moved to one side is engaged is provided, and the casing of the nut member is further moved from one side in the axial direction of the exciting coil to the other side. The casing is formed of a ferromagnetic material so as to cover at least an outer peripheral surface thereof. The outer end of a second yoke plate provided so that the inner end faces the outer peripheral surface of the plunger, and the casing is configured to be a magnetic path of the exciting coil. It is.

According to the present invention, the nut member can be reduced in weight and size with this configuration.

[0007]

Next, an 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 passenger car, and an electric drive device 2 according to the present invention is provided below the seat 1 to move the seat 1 forward and backward, and to seat the seat. The height of the front part and the rear part can be selectively adjusted, and these three types of operations can be performed in the embodiment.

That is, the electric drive unit 2 is provided integrally below the seat 1, but the electric drive unit 2
The reduction gear mechanisms 5 and 6 provided at the left and right ends of the output shaft 4 projecting in the left-right direction from the electric motor 3 are integrally fixed to the lower surface of the seat 1. 7, 8 is the first,
The second operating screw shafts, the operating screw shafts 7, 8, each have an axial line extending in the front-rear direction, and a locking portion extending in the axial direction on the outer periphery (in this embodiment, one-chamfered). However, it may be a two-sided chamfer, or may be a groove or the like.) 7a and 8a are formed. The operating screw shafts 7 and 8 rotate around the axis in connection with the drive of the electric motor 3, and the rear ends of these shafts are turned to support members 1 a projecting from the rear end of the lower surface of the seat 1. It is movably supported, and the shaft front ends are connected to the reduction gear mechanisms 5 and 6, and are transmitted to the first and second operating screw shafts 7 and 8 in a state where the driving of the electric motor 3 is reduced. It is configured as follows. Further, first nut members 9 and 10 are respectively screwed to the operation screw shafts 7 and 8 at a position intermediate between the operation screw shafts 7 and 8. The lower surfaces of 9, 10
It is provided integrally with a support 2a integral with the floor surface, and is set so as to relatively move back and forth with respect to the operation screw shafts 7, 8 based on the rotation of the operation screw shafts 7, 8. And, as will be described later, a clutch body (corresponding to the plunger of the present invention)
When the second shift position 20 is set, the seat 1 moves back and forth by relative movement of the first nut members 9 and 10 with respect to the operating screw shafts 7 and 8 based on the rotation of the operating screw shafts 7 and 8. Is set to

On the other hand, the position of the first operating screw shaft 7 on the front side of the first nut member 9 and the position of the second operating screw shaft 8 on the rear side of the first nut member 10 are located at the second position. The nut members 12 and 13 are screwed with each other, and when the clutch body 20 is at the second shift position as described later, the second nut members 12 and 13 are rotated based on the rotation of the operation screw shafts 7 and 8. It is adapted to move back and forth relative to the operating screw shafts 7 and 8. These second nut members 12 and 13 are connected to height adjusting mechanisms 16 and 17 disposed in front and rear of the seat 1 via connecting rods 14 and 15, respectively. The height is adjusted.

The first nut members 9 and 10 and the second nut members 12 and 13 provided on the first and second operation screw shafts 7 and 8, respectively, have the following configuration, as will be described later. The nuts 9, 10, 12, and 13 are provided with electromagnetic clutches having the same configuration, so that the relative movement with respect to the operation screw shafts 7 and 8 can be selectively switched on and off. Therefore, for convenience, the structure of the electromagnetic clutch of the first nut member 9 will be described below.

That is, the nut member 9 is housed in a casing 18 having a through-hole 18a penetrating the operating screw shaft 7 so as to be freely movable on the operating screw shaft 7. The casing 18 has a box shape with an open top, and is made of a ferromagnetic material such as iron, cobalt, and nickel. On one side of the casing 18, a cylindrical rotating body (corresponding to the first engagement receiving body of the present invention) 19 is slidably mounted. The rotating body 19 has a locking portion 7 a having an inner cylindrical surface formed on the operating screw shaft 7.
The rotation of the operation screw shaft 7 about the axis is rotated integrally with the operation screw shaft 7, but the operation screw shaft 7 is rotated.
Is set so that it can move freely in the axial direction with respect to the operation screw shaft 7 by loosely penetrating. Further, on the outer periphery of the other side of the rotating body 19, a clutch body 2 described later is provided.
A first clutch receiving portion 19a is formed so as to be removably engaged with the first clutch engaging portion 20a formed at zero. Incidentally, on the other side of the rotating body 19, there is a gap and the nut 21
The nut 21 is screwed into the operating screw shaft 7 in a penetrating manner, and a plurality of axially oriented engaging grooves 21a are formed in the outer peripheral surface thereof.

The clutch body 20 functions as a plunger for an electromagnetic clutch.
The other half portion has a small-diameter inner cylindrical shape, and the inner cylindrical surface engages with the nut engaging groove 21a so as to rotate integrally with the nut body engaging groove 21a in the direction around the axis but to allow the axial movement. 20b are formed. Further, one half of the clutch body 20 forms a large-diameter inner cylindrical portion 20c, into which the rotating body 19 is loosely fitted, so that when the clutch body 20 moves to one side as described later, the clutch body 20 is closed. One end portion of the body engagement receiving groove 20b is set so as to be removably engaged with the first clutch receiving portion 19a formed on the rotating body 19, and in this manner, the clutch body engaging receiving groove 20b is formed. One end side portion is configured to be the first clutch engaging portion 20a.

On the other hand, a clutch receiving body (corresponding to the second engagement receiving body of the present invention) 22 is provided on the other side of the casing 18, and the clutch receiving body 22 is provided in a cylindrical portion. And a square plate-like flange portion 22a is formed integrally with the flange portion 22a. The clutch receiving body 22 is formed with a large-diameter inner cylinder part on one side in which the clutch body 20 is fitted, and a small-diameter inner cylinder on the other side in which the nut body 21 is loosely fitted. A second clutch receiving portion 22b removably engaged with a second clutch engaging portion 20d formed on the other side surface of the clutch body 20 is provided on a step surface between the large-diameter inner cylinder portion and the small-diameter inner cylinder portion. Are formed. Then, as described later, the clutch body 20 moves to the other side and the second clutch engaging portion 20d engages with the second clutch receiving portion 22b, so that the clutch body 20 rotates around the axis with respect to the casing 18. Direction, so that the clutch body 20
The rotation of the operation screw shaft 7 around the axis is regulated, but the relative movement in the axial direction is provided freely. further,
The other end of the small-diameter inner cylindrical portion into which the nut body 21 is loosely fitted has a large-diameter cut-out restricting portion 22c formed on the clutch receiving body 22, and a projection formed on the other side of the outer peripheral surface of the nut body 21. 21
b, so that when the nut 21 attempts to move relatively to one side in the axial direction, a load in one side is applied to the clutch receiving body 22. ing.

On the other hand, reference numeral 23 denotes a coil bobbin integrated with the casing 18;
Is mounted on the clutch body 20 so that the outer periphery of the clutch body 20 is slidable, and is provided so that rotation about the axis with respect to the casing 18 is restricted. An exciting coil 24 is provided around the outer periphery of the coil bobbin 23.
Is wound and accommodated in the casing 18 in this state, whereby the outer peripheral surface of the exciting coil 24 from one side in the axial direction to the other side is covered by the casing 18.

Reference numeral 25 denotes a first yoke plate provided on one side of the casing 18, and the first yoke plate 25 is slidably fitted to the rotating body 19.
Further, the other side portion is provided so as to face one side of the clutch body 20. Further, between the other side of the first yoke plate 25 and the step 20e formed in the inner cylinder of the clutch body 20, a clutch ammunition 26 for returning the clutch body 20 is interposed. I have.
Reference numeral 27 denotes a second yoke plate provided so as to be sandwiched between the other side of the coil bobbin 23 and one side of the flange portion 22a of the clutch receiver 22.
The inner peripheral end of the second yoke plate 27 is the plunger 20.
And the outer peripheral end is opposed to the other side of the casing 18, so that when the exciting coil 24 is energized, the first yoke plate 25 , A magnetic path reaching the casing 18 via the clutch body 20 and the second yoke plate 27 is formed.
Then, the clutch body 20 becomes an excited core that is excited,
The first yoke plate 25 is set to perform a relative suction action. Reference numeral 29 denotes a sleeve interposed between the coil bobbin 23 and the clutch body 20.

When the exciting coil 24 is in a non-energized state, the clutch body 20 returns to the other side by receiving the urging force of the clutch ammunition 26. In this state, the first clutch engaging portion 20a at one end is provided. Is separated (disengaged) from the first clutch receiving portion 19a, but the second clutch engaging portion 20d on the other end is located at the second shift position engaged (engaged) with the second clutch receiving portion 22b. doing. In contrast,
When the exciting coil 24 is energized by a switch operation (not shown), and the clutch body 20 becomes an exciting iron core and is in an attraction state, the first yoke plate 25 is moved to the clutch bomber 26.
The first clutch engaging portion 20a on one end side.
Is engaged with the first clutch receiving portion 19a, but the second clutch engaging portion 20d at the other end is set to be located at the first shift position apart from the second clutch receiving portion 22b. Thus, the clutch operating means is constituted. When the operating screw shaft 7 rotates in the first shift position, the clutch body 20 rotates integrally with the rotating body 19, but is free from the clutch receiving body 22, and the clutch body 20 rotates. The body 19 and the nut body 21 rotate (co-rotate) integrally with the operation screw shaft 7, and the seat 1 is in a non-moving state without moving. On the other hand, when the operating screw shaft 7 rotates in the second shift position state, the clutch body 20 is free from the rotating body 19, but is integrated with the clutch receiving body 22 to restrict the rotation. Thus, the sheet 1 is configured to be in a moving state in which the sheet 1 moves.

By the way, the nut members 9 and 10 are on the side of the vehicle body, and the nut members 12 and 13 are
When the nut members 9, 10, 12, 13 are connected to the vehicle body or the connecting rods 13, 14, the nut members 9, 10, 12, 13 are fixed to the outside of the casing 18 with an adhesive or the like. However, since a considerable load is applied to the connecting portion, there is a possibility that a problem in strength may occur when the connecting portion is fixed with an adhesive or the like. Although it is considered that the pin 28 is fastened with the pin 28 in a state where the pin 28 is supported inside the casing 18, in this embodiment, the connecting portion using the pin 28 is connected to the clutch receiving member 22 on the other side of the casing 18. The outer periphery of the casing 18 does not become large because the flange 28a is located at the outer periphery of the exciting coil 24. It is sea urchin consideration.

In the embodiment of the present invention configured as described above, the front / rear position of the seat 1 or the front / rear height of the seat 1 can be adjusted. For example, when the front height of the seat 1 is adjusted. The energizing of the exciting coil 24 provided on the third nut member 12 may be stopped to release the clutch body 20 from the rotating body 19 to bring the clutch body 20 into the moving state in which the clutch body 20 is engaged with the clutch receiving body 22. Body 20
Is restricted in co-rotation with the operating screw shaft 7 of
The front height of the seat 1 is adjusted following the rotation of the operation screw shaft 7 accompanying the forward / reverse drive of the electric motor 3, and the first and second nut members 9, 10 are adjusted when the front / rear position is adjusted. May be set to the moving state, and the other nut members 12, 13 may be set to the non-moving state.

As described above, in the embodiment in which the present invention is implemented, the front and rear position adjustment and the height adjustment of the seat 1 are automatically performed by the electric driving force. Can be performed by selectively switching the corresponding clutch actuating means on and off. Accordingly, the drive control of the plurality of adjusting mechanisms can be performed by one electric motor. There is no need to provide a dedicated electric motor for the vehicle. As a result, these adjustment parts of the seat 1 are largely used, so that the number of parts can be reduced, the weight and size of the apparatus can be reduced, and the apparatus can be greatly contributed to simplification. Cost reduction can also be achieved.

In this case, the exciting coil 2
The yoke necessary to construct the magnetic path of
When the exciting coil 24 is excited, the clutch body 20 is excited via the casing 18, and the clutch body 20 serves as an exciting iron core relative to the first yoke plate 25. As a result, a magnetic path for performing an attractive operation is formed, so that there is no need to interpose a yoke between the exciting coil and the casing as in the related art.
As a result, a dedicated yoke is not required, so that the number of parts is reduced. In addition, since the dedicated yoke is not required, the casing 18 can be reduced in size, which greatly contributes to light weight, compactness, and cost reduction. be able to.

[0021]

In summary, since the present invention is constructed as described above, a plurality of movement adjustments such as adjustment of the front and rear position of the seat can be performed by changing the clutch body and the rotating body in the nut members provided correspondingly. It is only necessary to switch between the engagement with the clutch receiver and the engagement with the clutch receiver. As a result, a plurality of multi-position adjustments can be performed from one electric motor. Therefore, the number of parts can be reduced and the weight and size can be effectively reduced.

Further, in this case, the casing is formed of a ferromagnetic material, is also used as a yoke necessary for forming a magnetic path of the exciting coil, and when the exciting coil is excited, Since a magnetic path is formed from the casing via the first yoke plate, it is not necessary to interpose the yoke between the exciting coil and the casing as in the conventional case. In addition to being unnecessary, the number of parts can be reduced, and the necessity of a dedicated yoke is eliminated, so that the casing can be made small, and the cost and weight can be reduced significantly while reducing the size and weight.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of a sheet.

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

FIG. 3 is a longitudinal sectional view showing a state where a nut member is in a second shift position.

FIG. 4 is a longitudinal sectional view showing a state where the nut member is in a first shift position.

FIG. 5 is a horizontal sectional view of a nut member.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sheet 3 Electric motor 7 First operating screw shaft 9 First nut member 12 Second nut member 19 Rotating body 20 Clutch body 20a First clutch engaging part 20d Second clutch engaging part 21 Nut body 22 Clutch receiver 24 Excitation Coil 25 First yoke plate 26 Clutch ammunition 27 Second yoke plate

Claims (1)

(57) [Scope of request for utility model registration] A nut member screwed on an operating screw shaft that rotates forward and backward by receiving power from an electric motor relatively moves with the forward and reverse rotation of the operating screw shaft, thereby operating the operating portion. In the multi-drive device for a vehicle electrical component, the nut member is screwed to an operating screw shaft, and the nut member is axially movable with respect to the nut member so as to be rotatable around the axis. A plunger externally fitted to the nut so as to rotate integrally,
A return elastic machine for moving the plunger to the other side in the axial direction;
An exciting coil slidably fitted to the outer periphery of the plunger;
A second engagement receiving body with which the plunger moved to the other side in the axial direction is engaged with the second engagement receiving body, and an integral rotation in the axial direction with respect to the operation screw shaft is restricted. However, it is assumed that clutch means is provided which comprises a first engagement receiving body which is fitted in a freely movable manner in the axial direction, and is engaged with the plunger moved to one side in the axial direction, and ,
The casing of the nut member is formed of a ferromagnetic material so as to cover at least an outer peripheral surface from one side in the axial direction of the exciting coil to the other side, and is opposed to one side in the axial direction of the casing and one side of the plunger. The first yoke plate is opposed to the outer end of the second yoke plate provided on the other axial side of the casing so that the inner end is opposed to the outer peripheral surface of the plunger. A magnetic path structure of a multi-drive device for vehicular electrical components, wherein the magnetic path structure is configured to be a magnetic path.