JPH0721424U - Nut member structure in multi-drive system for vehicle electrical components - Google Patents

Abstract

(57) [Abstract] [Purpose] A plurality of nut members are provided on an operating screw shaft that rotates forward and backward in response to the power of an electric motor, and the relative movement of the nut member with respect to the operating screw shaft is linked to various operations. In the configured multi-drive device, the movement of the nut member, even when the nut body is moved to the first engagement receiving portion side, the engagement between the plunger and the second engagement receiving portion is ensured, Rotational resistance between the first engagement receiving portion and the nut body is reduced. [Structure] The clutch receiving body 22 of the nut member is provided with a restricting portion 22c that engages with a protruding portion 21b formed on the nut body 21, and the protruding portion 21b engages with the restricting portion 22c from the other side in the axial direction. The nut member structure in the multi-driving device for vehicle electrical components, which is configured to restrict the movement of the nut body 21 in one axial direction (direction of arrow A).

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a nut member structure in a multi-driving device for electric components for vehicles such as private cars, buses and trucks.

[0002]

[Problems to be Solved by Prior Art and Invention]

 Generally, in this type of vehicle, for example, as in the case of a seat (seat), each actuating part is selectively moved according to the physique of the occupant, such as forward / backward movement, reclining of the backrest part, vertical movement of the seat part, etc. There are some that can be adjusted. In this case, there is a problem that the number of parts becomes large and the sheet itself becomes large in a case of operating each operating section by using an independent electric motor.

Therefore, it has been attempted to use a single electric motor to selectively perform these plural operations by turning ON / OFF the corresponding switches. In response to this, a nut member that is interlocked with the operating portion is screwed onto the operating screw shaft that rotates in the forward and reverse directions, and the nut member is moved relative to the operating screw shaft to select an alternative operating portion. It has already been proposed that it be configured to operate. This is a nut body that is screwed onto the actuating screw shaft, a plunger that is axially movable with the nut body, and is fitted to rotate integrally with the nut body in the axial direction, and the plunger in the axial direction. A return missile that can be moved to the other side, an exciting coil that is fitted onto the plunger to force the plunger to move in one axial direction against the return missile, and an integral rotation in the axial direction of the operating screw shaft. Movement is restricted, and the second engagement receiving body with which the plunger that has moved to the other side in the axial direction engages, and it rotates integrally with the actuating screw shaft in the axial direction but is freely movable in the axial direction. And a first engaging receiving member with which the plunger moved to the one side in the axial direction is engaged, wherein the exciting coil is in a non-excited state. Then, the plunger moves to the other side in the axial direction and becomes the second engagement receiving body. In the engaged state, the nut body, the plunger, and the second engagement receiving body on the casing side are integrated, whereby the nut member is moved relative to the rotating actuating screw shaft to actuate the operating portion. Is designed to operate.

By the way, in the case where such nut member is provided, when the plunger engages with the second engaging receiving member and moves the nut member relative to the actuating screw shaft, the first engaging receiving member. Causes the nut body to move in a direction away from the first engagement receiving body when the actuating screw shaft is rotated to the side for moving the nut body to the second engagement receiving body side, so that almost all the load is applied. When the operating screw shaft rotates to the side that moves the nut body to the first engagement receiving body side, the nut body moves to the first engaging receiving body side. And the first engagement receiver is pinched and pressed between the casing and the casing. As a result, the rotational resistance of the first engagement receiver increases and the operating efficiency is impaired. .

[0005]

[Means for Solving the Problems]

 The present invention has been made in view of the above circumstances and was devised with the object of providing a nut member structure in a multi-driving apparatus for vehicle electrical components, which can eliminate these drawbacks. The nut member, which is screwed on the actuating screw shaft that rotates in the normal and reverse directions by receiving the power of, moves relative to the actuating screw shaft in the normal and reverse directions, thereby operating the actuating part. In a multi-drive system for electric components of a vehicle, the nut member described above is assumed to be housed in a casing, and a nut body screwed to the actuating screw shaft is fitted onto the nut body and axially moved with respect to the nut body. A plunger that is freely movable and fits so as to rotate as a unit in the axial direction, a return munition that moves the plunger to the other side in the axial direction, and an excitation coil that is slidably fitted on the outer periphery of the plunger Integrated with the casing The rotation of the actuating screw shaft in the axial direction is restricted, and the second engagement receiving body with which the plunger moved to the other side in the axial direction engages, and the axial direction of the actuating screw shaft in the axial direction. And a clutch means configured to integrally rotate, but to be freely movable in the axial direction, and to include a first engagement receiving body with which the plunger moved to one side in the axial direction is engaged. Further, the second engagement receiving body is provided with a regulating portion for engaging with the nut body and regulating the movement of the nut body in one axial direction. To do.

According to this configuration, the present invention makes it possible, even if the actuating screw shaft is rotated to the side for moving the nut body toward the first engagement receiving body side, of the first engagement receiving body by the nut body. It is designed to reduce the turning resistance.

[0007]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes a seat to be mounted on a vehicle such as a passenger car. An electric drive device 2 embodying the present invention is provided below the seat 1 to move the seat 1 back and forth, The height of the front portion and the rear portion of the seat portion can be selectively adjusted, and these three types of operations can be performed in the embodiment.

That is, although the electric drive device 2 is integrally provided in the lower portion of the seat 1, the electric drive device 2 is provided at both left and right ends of the output shaft 4 protruding in the left-right direction from the electric motor 3 constituting the electric drive device 2. The reduction gear mechanisms 5 and 6 provided are integrally fixed to the lower surface of the seat 1. Reference numerals 7 and 8 denote first and second actuating screw shafts. These actuating screw shafts 7 and 8 have a center line extending in the front-rear direction, and an outer periphery of the engaging portion extending in the axial direction (the present embodiment). In the example, it is chamfered on one side, but may be chamfered on two sides, and may also 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 their axes. The rear ends of these shafts are supported by the supporting member 1a projecting from the rear end of the lower surface of the seat 1. It is rotatably supported, and the front end of the shaft is connected to the deceleration 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. Further, the first nut members 9 and 10 located in the middle of the actuating screw shafts 7 and 8 are respectively screwed into the actuating screw shafts 7 and 8, and these first and second nut members are respectively engaged. The lower surfaces of 9 and 10 are integrally provided on a support body 2a that is integral with the floor surface, and move relative to the operating screw shafts 7 and 8 back and forth based on the rotation of the operating screw shafts 7 and 8. Is set to. Then, as will be described later, when the clutch body (corresponding to the plunger of the present invention) 20 is set to the second shift position, the operation screw shaft 7 of the first nut member 9 and 10 is rotated by the rotation of the operation screw shafts 7 and 8. , 8 is set so that the seat 1 moves back and forth by relative movement relative to the front and rear.

On the other hand, at the position of the first actuating screw shaft 7 on the front side of the first nut member 9 and on the position of the second actuating screw shaft 8 on the rear side of the first nut member 10, Nut members 12 and 13 of the second nut member 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 rotated based on the rotation of the operation screw shafts 7 and 8. Is movable relative to the operating screw shafts 7 and 8 in the front-rear direction. The second nut members 12 and 13 are connected to height adjusting mechanisms 16 and 17 arranged in front and rear of the seat 1 through connecting rods 14 and 15, respectively, and the upper and lower front and rear portions of the seat 1 are connected to each other. It is designed to adjust the 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 configurations, which will be described later. As described above, the relative movement with respect to the actuating screw shafts 7 and 8 is set so as to be selectively switchable intermittently. However, each of these nut members 9, 10, 12 and 13 incorporates an electromagnetic clutch of the same construction. 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 installed in the casing 18 having the 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 has a box shape with an open upper part, and the material thereof is a ferromagnetic material such as iron, cobalt or nickel. A cylindrical rotating body (corresponding to the first engagement receiving body of the present invention) 19 is slidably mounted on one side of the casing 18. The rotating body 19 has an inner cylindrical surface that engages with a locking portion 7a formed on the actuating screw shaft 7, and is integrated with the actuating screw shaft 7 when the actuating screw shaft 7 rotates about its axis. Although it rotates, the actuating screw shaft 7 penetrates in a loose fitting manner so that the actuating screw shaft 7 is free to move in the axial direction. Further, on the outer periphery of the other side of the rotating body 19, there is formed a first clutch receiving portion 19a which is removably engaged with a first clutch engaging portion 20a formed on the clutch body 20 described later. Incidentally, a nut body 21 is adjacent to the other side of the rotating body 19 with a gap. The nut body 21 is screwed through the actuating screw shaft 7 in a penetrating manner, and its outer peripheral surface is A plurality of engagement grooves 21a facing the axial direction are engraved.

Although the clutch body 20 functions as a plunger of an electromagnetic clutch, it has a cylindrical shape, and the other half has a small diameter inner cylinder, and the inner cylinder surface has the nut body engaging groove 21a. On the other hand, an engagement receiving groove 20b is formed so as to integrally rotate in the axial direction but to allow the axial movement. Further, one half of the clutch body 20 is loosely fitted into the large-diameter inner cylindrical portion 20c so that the clutch body 20 will move to one side as will be described later. The one end side portion of the body engagement receiving groove 20b is set to engage with the first clutch receiving portion 19a formed in the rotating body 19 in a freely detachable manner. The one end side portion is configured to be the first clutch engaging portion 20a.

On the other hand, a clutch receiver 22 (corresponding to the second engagement receiver of the present invention) 22 is provided on the other side of the casing 18, and the clutch receiver 22 has a casing formed in a casing. A rectangular plate-shaped flange portion 22a is integrally formed so as to be integrated with 18. The clutch receiving body 22 is formed with a large-diameter inner cylinder portion into which the clutch body 20 is fitted, and a small-diameter inner cylinder into which the nut body 21 is loosely fitted, on the other side. On the step surface between the large-diameter inner cylinder portion and the small-diameter inner cylinder portion, the second clutch receiving portion 2 which is detachably engaged with the second clutch engaging portion 20d formed on the other end side surface of the clutch body 20. 2b is formed. Then, as will be 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 about the axis with respect to the casing 18. It is provided in such a manner that the clutch body 20 is prevented from rotating around the axis of the actuating screw shaft 7, but is allowed to move relative to each other in the axial direction.

Further, the clutch receiving body 22 is formed with a stepped regulation portion 22c by cutting out the inner edge portion on the other side of the small-diameter inner cylindrical portion into which the nut body 21 is loosely fitted, while forming a nut body. On the outer peripheral surface on the other side of 21, there is formed a protrusion 21b which engages with the restriction portion 22c. The protrusion 21b is configured to engage with the step-like regulation portion 22c from the other side, whereby the nut body 21 is axially one side with respect to the clutch receiver 22. When relatively moved in the direction of arrow A, the clutch receiver 22 receives the moving load in the one side direction from the protrusion 21b via the restriction portion 22c. Further, the clutch receiver 22 is provided with an exciting coil coil bobbin 23 having a restricting 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. The clutch receiver 22 is supported by the casing 18, and thereby the clutch receiver 22 that receives the moving load is restricted from moving in the arrow A direction.

Reference numeral 25 denotes a first yoke plate that is provided opposite to one side of the casing 18, and the first yoke plate 25 is slidably fitted on the rotating body 19 and further. The other side portion is provided so as to face one side of the clutch body 20, and the other side portion of the first yoke plate 25 and the stepped portion 20e formed in the inner cylindrical portion of the clutch body 20 are held together. A clutch ammunition 26 for returning the clutch body 20 is interposed. When the exciting coil 24 is energized and excited, a magnetic path is formed from the casing 18 to the casing 18 via the first yoke plate 25, the clutch body 20, and the second yoke plate 27. The plate 25 is set so as to attract the clutch body 20. As described above, in this embodiment, the casing 18 serves as the yoke of the exciting coil 24 to make the nut member compact. It is considered to measure.

By the way, the clutch body 20 returns to the other side by receiving the urging force of the clutch ammunition 26 when the exciting coil 24 is in the non-excited state, and in this state, the first clutch engagement on the one end side The part 20a is separated (disengaged) from the first clutch receiving part 19a, but the second clutch engaging part 20d on the other end side is engaged (engaging) with the second clutch receiving part 22b. Located in position. On the other hand, when the exciting coil 24 is excited by a switch operation (not shown), the clutch body 20 is attracted toward the one end side by the first yoke plate 25 against the urging force of the clutch ammunition 26. The first clutch engaging portion 20a on one end side moves to engage with the first clutch receiving portion 19a, but the second clutch engaging portion 20d on the other end side separates from the second clutch receiving portion 22b. It is set so as to be located in the shift position, and the clutch actuating means is thus configured. When the actuating screw shaft 7 rotates in the first shift position, the clutch body 20 rotates integrally with the rotating body 19, but the clutch receiving body 22 is free to rotate, and the clutch body 20 rotates. The body 19 and nut body 21 rotate (co-rotate) integrally with the actuating screw shaft 7, and the sheet 1 is brought into a non-moving clutch continuation state in which it does not move. On the other hand, when the actuating screw shaft 7 rotates in the second shift position, the clutch body 20 is free from the rotating body 19 but rotates together with the clutch receiving body 22. It is regulated, and thereby, the sheet 1 is moved so as to be in a cleaving state, which is a moving state.

Further, in this embodiment, the nut members 9 and 10 are connected to the vehicle body side, and the nut members 12 and 13 are connected to the operating portion via the connecting rods 14 and 15. When the nut members 9, 10, 12, 13 are connected to the vehicle body or the connecting rods 13, 14, they may be fixed to the outside of the casing 18 with an adhesive or the like, but a considerable load is applied to the connecting portions. Therefore, there is a possibility that a problem with strength may occur in fixing with an adhesive or the like. Therefore, a through hole is formed in the casing 18, and the pin 28 is supported by the flange 28a supported inside the casing 18. Consideration is given to fastening. In this 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, so that the flange portion 28a causes the exciting coil to move. The outer circumference of the casing 18 is designed so as not to become large due to the fact that it is located at the outer peripheral portion of 24.

In the embodiment of the present invention configured as described above, the front-back position of the seat 1 or the front-back height of the seat 1 can be adjusted. For example, the front-side height of the seat 1 can be adjusted. In this case, the exciting coil 24 provided on the third nut member 12 may be de-energized so that the clutch body 20 is freed from the rotating body 19 and engaged with the clutch receiving body 22. Then, the rotation of the clutch body 20 together with the actuation screw shaft 7 is restricted, and the seat 1 moves forward and backward in accordance with the rotation of the actuation screw shaft 7 associated with the forward and reverse driving of the electric motor 3. When the above-mentioned adjustment is performed and the front-rear position adjustment is performed, the first and second nut members 9 and 10 may be in a moving state, and the other nut members 12 and 13 may be in a non-moving state.

As described above, in the embodiment of the present invention, the front-back position adjustment and the height adjustment of the seat 1 are automatically performed by the electric driving force, but these adjustments can be selected. , The corresponding clutch actuating means can be selectively switched on and off, and accordingly, the drive control of the plurality of adjusting mechanisms can be driven by one electric motor, and each adjusting mechanism can be driven. 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 the assembling work. It also simplifies and lowers costs.

In addition, in this device, when the actuating screw shaft rotates in a state where the exciting coil 24 is in the non-excited state and is in the clutch continuation state, and the nut body 21 attempts to move relatively in the arrow A direction, The protrusion 21b of the nut body 21 engages with the restriction portion 22c formed on the clutch receiver 22, so that the clutch receiver 22 receives the moving load of the nut body 21 and the movement received by the clutch receiver 22. The load 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 body 21 in the direction of arrow A is restricted. As a result, the pressing of the rotating body 19 against the casing 18 due to the movement restriction of the nut body 21 in the direction of arrow A is no longer carried out, which increases the rotational resistance of the rotating body 19 and increases the operating efficiency. It is possible to surely avoid the trouble that is impaired, eliminate the characteristic difference between the movement in the direction of arrow A and the movement in the opposite direction, and make the operating efficiency as similar as possible.

The present invention is not limited to the above-mentioned embodiment, and the clutch receiver which receives the moving load of the nut body in one axial direction has the coil bobbin and the second yoke plate as in the above-mentioned embodiment. It is not necessary to support the casing through the casing, and the second yoke plate is engaged and supported by the casing by forming a step or protrusion on the inner circumference of the casing, and the clutch receiver is directly engaged and supported by the casing. Further, as in the second embodiment shown in FIG. 6, the engaging portion 22d formed on the clutch receiving body 22 is engaged with the flange portion 28a of the pin 28 for connecting to the operating portion. The coil bobbins may be configured to be combined with each other, and this configuration has an advantage that it is not necessary to measure the strength up of the coil bobbin.

[0022]

[Operation effect]

 In short, since the present invention is configured as described above, a plurality of movement adjustments such as front and rear position adjustment of the seat can be performed by engaging the clutch body with the rotating body in the nut member provided correspondingly. It suffices to switch between engagement with the clutch receiving body, and as a result, a plurality of multi-position adjustments can be made from one electric motor, and it is not necessary to provide corresponding electric motors. The number of parts can be reduced and lightweight compaction can be effectively achieved.

In addition, in this device, when the plunger is engaged with the second engagement receiving body by the clutch means and the actuating screw shaft is rotated, and the nut body moves relatively to one side in the axial direction, The nut body engages with the restriction portion formed on the second engagement receiver, so that the second engagement receiver receives the moving load generated in the nut, and the second engagement receiver is the casing. Since it is supported integrally with the nut body, the moving load of the nut body is received and supported by the casing. Therefore, the nut body is surely restricted from moving in one axial direction. The movement of the nut body to the one side in the axial direction is restricted so that the first engagement receiving body is not pressed and pinched by the one side of the casing, and the rotation of the first engagement receiving body is prevented. Failure to increase operating efficiency due to increased resistance It is possible to reliably avoid the occurrence of a difference, eliminate the characteristic difference in the movement toward both sides in the axial direction, and make the operating efficiency as uniform as possible.

[Brief description of drawings]

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

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

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

FIG. 4 is a vertical cross-sectional view showing the nut member in a first shift position.

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

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 seat 3 electric motor 7 first operation screw shaft 9 first nut member 12 second nut member 19 rotating body 20 clutch body 20a first clutch engaging portion 20d second clutch engaging portion 21 nut body 21b projecting portion 22 clutch receiving Body 22c Regulation part 23 Coil bobbin 23a Regulation piece 24 Excitation coil 25 First yoke plate 26 Clutch ammunition 27 Second yoke plate

Claims (1)

[Scope of utility model registration request] 1. A nut member screwed on an actuating screw shaft that rotates forward and backward in response to power from an electric motor moves relative to the actuating screw shaft when the actuating screw shaft rotates forward and backward. In the multi-driving device for a vehicle electrical component configured to perform the above, it is assumed that the nut member is housed in a casing, a nut body screwed to the actuating screw shaft, and a nut body externally fitted to the nut body. A plunger that is movable in the axial direction with respect to the body and is fitted so as to rotate integrally with the body around the axis, a return ammunition that moves the plunger to the other side in the axial direction, and a slidable outer fit on the outer periphery of the plunger. A second engagement receiving body that is integrally supported by the casing, is regulated from rotating integrally with the actuating screw shaft in the axial direction, and is engaged by the plunger that has moved to the other side in the axial direction. Although it rotates integrally with the actuating screw shaft in the axial direction, It fits freely in the axial direction,
And a clutch means configured to include a first engagement receiving body with which the plunger moved to one side in the axial direction is engaged, and the second engagement receiving body further includes a nut body. A nut member structure in a multi-driving device for an electric component for a vehicle, characterized in that a restricting portion for engaging with the nut and restricting movement of the nut body in one axial direction is provided.