JP2589269Y2 - Nut member structure in multi-drive device 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 nut member structure in 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.

In the case where such a nut member is provided, when the plunger is engaged with the second engagement receiving member and the nut member is relatively moved with respect to the operating screw shaft, the first engagement receiving member is required. Is that when the operating screw shaft is rotated to move the nut body to the second engagement receiving body side, the nut body tends to move away from the first engagement receiving body, so that almost load is applied. When the operating screw shaft is rotated to move the nut body to the first engagement receiving body side, the nut body moves to the first engagement receiving body side. The first engaging receiver is moved and pressed between the casing and the casing. As a result, there is a problem that the rotational resistance of the first engaging receiver is increased and the operating efficiency is impaired.

[0005]

SUMMARY OF THE INVENTION In view of the above circumstances, the present invention has been made to provide a nut member structure in a multi-drive apparatus for vehicular electrical components 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 housed in a casing, and the nut member is screwed to an operation screw shaft, and the nut member is externally fitted to the nut member. A plunger which is fitted to the body so as to be movable in the axial direction and is integrally rotated in the direction around the axis; a return spring which moves the plunger to the other side in the axial direction; An exciting coil, A second engagement receiving body, which is integrally supported by the casing, is restricted from rotating integrally with the operating screw shaft in the axial direction, and is engaged with the plunger moved to the other side in the axial direction, and And a first engagement receiving member which is integrally rotatable around the axis but is freely movable in the axial direction, and is engaged with a plunger moved to one side in the axial direction. Means is provided, and the second engagement receiving member further includes a regulating portion for engaging with the nut body to regulate movement of the nut body to one side in the axial direction. It is characterized by having.

According to the present invention, even if the operating screw shaft is rotated to the side for moving the nut to the first engagement receiving body, the first engagement receiving body is rotated by the nut. The dynamic resistance can be reduced.

[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, a clutch body 2 to be described later is provided on the outer periphery of the other side of the rotating body 19.
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 engaging grooves 21a facing in the axial direction are formed on 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 portion of the clutch body 20 forms a large-diameter inner cylindrical portion 20c and loosely fits the rotating body 19, and 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 clutch receiving body 22 has a stepped regulating portion 22c formed by cutting out the inner edge of the other side of the small-diameter inner cylindrical portion into which the nut 21 is loosely fitted. On the outer peripheral surface on the other side, a protrusion 21b that engages with the restriction portion 22c is formed. The protruding portion 21b is configured to engage with the step-shaped regulating portion 22c from the other side, so that the nut body 21 is axially one side with respect to the clutch receiving body 22. When the relative movement is performed in the direction indicated by the arrow A, the clutch receiving body 22 receives the moving load in one side direction from the protrusion 21b via the restricting portion 22c. Further, the clutch receiving body 22 is provided with an exciting coil coil bobbin 23 having a regulating piece 23a extending in contact with the casing 18.
And a second yoke plate 27 provided to form a magnetic path of the exciting coil 24, so that the clutch receiver 22 is supported by the casing 18 by the moving load. Has a configuration in which movement in the direction of arrow A is restricted.

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, and a clutch is provided between the other side portion of the first yoke plate 25 and the step portion 20e formed in the inner cylindrical portion of the clutch body 20. A clutch ammunition 26 for returning the body 20 is interposed. When the excitation coil 24 is energized and excited, the first yoke plate 25, the clutch body 20, the second yoke plate 2
7, a magnetic path extending to the casing 18 is formed, and the first yoke plate 25 is set to attract the clutch body 20. Thus, in this embodiment, the casing 18 is The configuration is such that the yoke 24 is also used to reduce the size of the nut member.

When the exciting coil 24 is in the non-excited 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 excited by a switch operation (not shown), the clutch body 20 is attracted to the one end by the first yoke plate 25 and moved against the urging force of the clutch ammunition 26, and moves toward the one end. The first clutch engaging portion 20a engages with the first clutch receiving portion 19a, but the second clutch engaging portion 20d on the other end is located at the first shift position apart from the second clutch receiving portion 22b. Is set as
Thus, the clutch operating means is constituted. When the operating screw shaft 7 rotates in the first shift position state, the clutch body 20 rotates integrally with the rotating body 19,
The clutch body 22 is freely connected to the clutch body 2.
0, the rotating body 19 and the nut body 21 rotate (co-rotate) integrally with the operating screw shaft 7, and the clutch 1 is in a non-moving state in which the seat 1 does not move. 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. As a result, the clutch 1 is configured to be in a clutch disconnected state in which the sheet 1 moves.

In this embodiment, the nut member 9
10 is on the vehicle body side and nut members 12 and 13
Is connected to the operating portion via the connecting rods 14 and 15. When these nut members 9, 10, 12, and 13 are connected to the vehicle body or the connecting rods 13, 14, the casing is made of an adhesive or the like. It is conceivable that the connection portion 18 is fixed to the outside, but since a considerable load is applied to the connection portion,
There is a possibility that a problem in strength may occur in the fixing by the adhesive or the like. Therefore, a through hole is formed in the casing 18 so that the flange 28 a is fixed with the pin 28 while being supported inside the casing 18. I am careful. In the present embodiment, the connecting portion using the pin 28 is located on the outer peripheral surface of the cylindrical portion of the clutch receiving body 22 on the other side of the casing 18, whereby the flange 28
a is located at the outer peripheral portion of the exciting coil 24,
Care is taken so that the outer shape of the casing 18 does not become large.

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 height of the seat 1 is adjusted in accordance with 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 seat 1 is adjusted in the forward / backward position. 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
When the nut 4 is in the non-excited state and is in the clutch connected state, the operating screw shaft rotates and the nut 21 attempts to move relatively in the direction of arrow A, the protrusion 21b of the nut 21 The moving load of the nut 21 is engaged with the restricting portion 22c formed on the
The moving load received by the clutch receiver 22 is received and supported by the casing 18 via the coil bobbin 23 and the second yoke plate 27, and the movement of the nut 21 in the direction of arrow A is restricted. Will be. As a result, the pressing of the rotator 19 against the casing 18 based on the restriction of the movement of the nut body 21 in the direction of the arrow A is eliminated, whereby the rotation resistance of the rotator 19 becomes large and the operating efficiency is impaired. Failures can be avoided reliably, and the characteristic difference between movement in the direction of arrow A and movement in the opposite direction can be eliminated.
The operating efficiency can be as similar as possible.

Incidentally, the present invention is not limited to the above-described embodiment, and the clutch receiving body which receives the moving load of the nut body in one axial direction is a coil bobbin, as in the above-described embodiment.
There is no need to support the casing via the second yoke plate, but a step or projection formed on the inner periphery of the casing to engage and support the second yoke plate with the casing. The clutch receiver is directly engaged with the casing. 6 and a flange portion 28a of a pin 28 for connecting a locking projection 22d formed on the clutch receiver 22 to an operating portion as in the second embodiment shown in FIG. The configuration may be such that the coil bobbin does not need to be increased in strength.

[0022]

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, when the plunger is engaged with the second engagement receiving member by the clutch means and the operating screw shaft is rotated to relatively move the nut member to one side in the axial direction. The nut body engages with the restricting portion formed on the second engagement receiving body, so that the second engagement receiving body receives a moving load generated on the nut body, and the second engagement receiving body further includes a casing. Since the nut is supported integrally, the moving load of the nut body is received and supported by the casing, and therefore, the movement of the nut body to one side in the axial direction is reliably restricted. Since the movement of the nut body to one side in the axial direction is restricted, the first engagement receiver is not pressed and pinched by one side of the casing, and the rotation of the first engagement receiver is prevented. Confirm that the operating efficiency is impaired due to the large resistance. It made avoided, and obtained eliminate characteristic differences in movement in the axial direction both sides, can be made as much as possible the same efficiency of operation.

[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.

FIG. 6 is a longitudinal sectional view showing a second embodiment of the nut member.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 sheet 3 electric motor 7 first operating screw shaft 9 first nut member 12 second nut member 19 rotator 20 clutch body 20 a first clutch engaging part 20 d second clutch engaging part 21 nut body 21 b protrusion 22 clutch receiver Body 22c regulating part 23 coil bobbin 23a regulating piece 24 exciting 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 housed in a casing, and the nut member is screwed to an operation screw shaft, and the nut member is externally fitted to the nut member. A plunger which is fitted to the body so as to be movable in the axial direction and is integrally rotated in the direction around the axis, a return spring which moves the plunger to the other side in the axial direction, and an outer fitting slidably fitted on the outer periphery of the plunger. An exciting coil, and a second engagement receiving body integrally supported by the casing, the integral rotation of the operating screw shaft in the direction around the axis is regulated, and the plunger moved to the other side in the axial direction engages; It rotates integrally with the operating screw shaft around the axis. Fits freely in the axial direction,
And a clutch means including a first engagement receiving member with which the plunger moved to one side in the axial direction is engaged. Further, the second engagement receiving member further includes a nut member. A nut member structure in a multi-drive device for vehicular electrical components, wherein a restricting portion is provided for restricting movement of the nut body to one side in the axial direction by engaging with the nut.