JP6242355B2 - Driving device and opening / closing mechanism - Google Patents

Description

  The present invention relates to a drive device and an opening / closing mechanism.

  For example, an opening / closing body driving device is known as a device for opening / closing an opening / closing body such as a back door of an automobile. The opening / closing body driving device, for example, expands / contracts the shaft by a motor, thereby opening / closing the opening / closing body (see, for example, Patent Document 1).

JP2013-104228A

  A driving spindle 21 as an opening / closing body driving device described in Patent Document 1 includes a main body portion 23 and a spindle 25. The spindle 25 is slidably engaged with the main body 23. The main body 23 is connected to the body 13, and the spindle 25 is connected to the back door 11. The spindle 25 moves with respect to the main body 23 by a motor and a motion direction conversion mechanism that converts a rotational motion into a linear motion. As a result, the drive spindle 21 is expanded and contracted, thereby opening and closing the back door 11.

In the above drive device, the lead wire of the motor is led out from the drive device so as to be connected to a power supply external to the drive device. However, water easily enters the inside of the driving device from the lead wire lead-out portion.
Further, the motor needs to be arranged at an appropriate position in order to be able to transmit the driving force to the operating part due to a dimensional tolerance or the like. However, if the position adjusting member is individually provided, the number of parts increases.
An object of the present invention is to provide a drive device that has a structure that prevents water from entering from the outside having a drive unit housed in an internal space of a case, and that can be arranged at an appropriate position with a small number of parts. .

  Hereinafter, a plurality of modes will be described as means for solving the problems. These aspects can be arbitrarily combined as necessary.

A drive device according to an aspect of the present invention is housed in a case having an internal space and an opening provided so that the internal space communicates with the outside, an operating portion that moves relative to the case, and the internal space. A drive unit that operates the operation unit, a transmission unit that transmits the driving force of the drive unit to the operation unit, and a lid unit that closes the opening are provided.
The lid portion has a notch-like portion provided so that the internal space communicates with the outside of the case when the opening is closed.
The drive device further includes a derivation member having a base part at least partially disposed in the internal space and a derivation part that extends from the base part and is led out to the outside through the notch-like part.
The lead-out member has an insertion passage through which the lead-out line of the drive part is inserted through the lead-out part side opening provided at the end of the lead-out part and the opening side opening provided at the base part.
The base portion includes a seal portion that suppresses intrusion of moisture from between the case and the lid portion, and a position adjustment portion that elastically biases the drive portion to a position where the drive force can be transmitted to the transmission portion. Have

In this drive device, the seal portion of the base portion of the lead-out member suppresses intrusion of moisture from between the case and the lid portion, and the position adjustment portion of the base portion of the lead-out member elastically biases the drive portion. By doing so, the drive unit becomes a position where the drive force can be transmitted to the transmission unit.
As described above, since the lead-out member has the seal part and the position adjustment part, the number of parts can be reduced.

  The opening of the case is closed by a sealing portion at the base portion of the lead-out member and by a lid portion and a lead-out member in which the lead-out portion is arranged in the notch-like portion.

There may be a plurality of convex portions on the peripheral surface of the base portion, and the base portion may be accommodated in the internal space so that the convex portions are in contact with the inner surface of the case.
In this case, the motor is centered in the case by the base, and further, a vibration isolation effect for the motor is realized.

  The lead-out part may be formed in a bellows shape. Thereby, the derivation | leading-out part can be expanded-contracted.

  An opening / closing mechanism according to another aspect of the present invention includes the above-described driving device, the opening / closing body, and a fixed object whose position is fixed, and the opening / closing body is driven by driving of the driving device. The proximal end of the drive device is connected to the fixed object, the distal end of the drive device is connected to the opening / closing body, and the opening / closing body is opened / closed.

  In the drive device according to the present invention, it is possible to suppress the entry of moisture and reduce the number of parts.

The schematic side view of a vehicle rear part. Sectional drawing of the drive device in 1st Embodiment of this invention. FIG. 3 is a partially enlarged view of FIG. 2, and is a cross-sectional view near the opening of the case. The perspective view of the cover part of FIG. The front view of the cover part of FIG. Sectional drawing of the cover part of FIG. The top view of the cover part of FIG. The bottom view of the cover part of FIG. FIG. The partial perspective view which shows the opening of a derivation | leading-out member and a case. Sectional drawing of opening vicinity of the case in 2nd Embodiment.

1. First Embodiment (1) Schematic Configuration of Driving Device Hereinafter, a driving device 1 as an embodiment of the present invention will be described with reference to FIG. FIG. 1 is a schematic side view of the rear portion of the vehicle.
The driving device 1 is a device for opening and closing the opening / closing body 2. The driving device is not limited to the opening / closing mechanism, and can be applied to, for example, a device that moves an article or structure vertically, horizontally, or diagonally. The driving device 1 has an opening / closing mechanism whose base end is connected to a vehicle body that is an object to be fixed and whose distal end is connected to the opening / closing body so as to open / close the opening / closing body so that the opening / closing body is driven by the driving device 1. Used as a driving device. In addition, the drive device 1 should just be supported by fixing to a fixed target object, and may be fixed so that the turning operation | movement centering on the connection site | part with a fixed target object may be carried out.

  In the example shown in FIG. 1, the opening / closing body 2 is a back door for opening and closing the rear portion of the vehicle 3. For example, the opening / closing body 2 may be a sliding door that opens and closes a side opening, or may be a window such as an automatic opening / closing window. In addition, the opening / closing body 2 may be an openable / closable wall (door) that separates one space from another space.

The drive device 1 is a device that drives the opening / closing body 2 by converting a rotational motion of a motor or the like into a linear expansion / contraction motion. The driving device 1 has one end in the length direction connected to the inside of the opening / closing body 2 and the other end connected to the rear end of the vehicle 3. The driving device 1 is capable of driving the opening / closing body 2 by expanding and contracting in the length direction, and is provided so as to be able to move the opening / closing body 2 to a fully open position or a fully closed position.
The drive device 1 is not particularly limited as long as the opening / closing body 2 can be opened / closed, and the drive device 1 may be arranged one on each of the left and right sides of the vehicle 3 and the opening / closing body 2. One may be arranged on either the left or right side. Furthermore, two or more drive devices 1 may be arranged. Moreover, you may use combining the drive device 1 and a gas damper.

(2) Detailed Configuration of Drive Device The configuration of the drive device 1 will be described with reference to FIGS. 2 and 3. FIG. 2 is a cross-sectional view of the driving device. FIG. 3 is a partially enlarged view of FIG. 2, and is a cross-sectional view in the vicinity of the opening of the case.
The drive device 1 has a case. The case is a member having an internal space and an opening provided so that the internal space communicates with the outside. In this embodiment, the case is the outer cylinder 5. As will be described later, the outer cylinder 5 that is a case is a member that accommodates the drive unit and the transmission unit, and it is sufficient that the drive unit can move relative to the case. The outer cylinder 5 has an internal space 5a and an opening 5b that is a first opening provided so that the internal space 5a communicates with the outside. The opening 5b is provided on the proximal end side (the left side in FIG. 2) of the outer cylinder 5.

The drive device 1 has an operation part. The operating part is a member that moves relative to the case. In this embodiment, the operating part is the attachment member 6. As will be described later, the attachment member 6 that is an operation part is connected to the transmission part and is operated by transmitting a driving force from the transmission part. Moreover, the attachment member 6 has a ball socket joint, for example, and is rotatably connected with respect to the attachment member (not shown) of the opening-closing body 2. As shown in FIG.
The drive device 1 has a drive part. The drive unit is housed in the internal space of the outer cylinder 5 as a case, and generates a drive force that operates the operation unit. The driving direction may be either linear or rotational. In this embodiment, the drive unit includes a motor 7. The motor 7 has an output unit 51 to which a transmission unit described later is attached. As long as the output unit 51 can be connected to the transmission unit and transmit the driving force to the transmission unit, the connection form with the transmission unit is not particularly limited. In order to facilitate the adjustment, it is preferable to be formed so as to be connectable to the transmission portion by spline fitting. In the present embodiment, the output unit 51 is a spline shaft. The motor 7 is accommodated in the internal space 5a. Specifically, the motor 7 is disposed at a position on the opening 5b side in the internal space 5a. The motor 7 is fixed to the outer cylinder 5 at that position. The output portion 51 of the motor 7 is connected to a hole provided at an end portion of the screw 9 (described later) and capable of being splined with the output portion 51. Thereby, the motor 7 can rotate the screw 9 around an axis based on a motor control signal from a control unit (not shown). In this embodiment, the motor 7 is an electric motor, and is a DC motor or an AC motor. When the driving device 1 is used as an opening / closing driving device for an automobile door, a direct current motor is preferable because a direct current power source of the automobile can be used.

The drive device 1 has a transmission part. The transmission unit may be any member that transmits the driving force of the drive unit to the operating unit. In this embodiment, the transmission unit includes a screw 9 and a guide nut 11. The screw 9 is rotationally driven by the driving force of the motor 7. Specifically, the screw 9 is a rod-like member having a thread formed on the outer peripheral surface thereof so as to protrude outward in the circumferential direction, and is proximal to the screw 9 by a bearing 29 fixed to the inner portion of the outer cylinder 5. The shaft portion 9a provided with is supported so as to be rotatable around the axis. The screw 9 serving as a transmission portion has an input portion 53 at the base end. The input portion 53 is a portion to which the driving force from the motor 7 is input. In this embodiment, the input portion 53 is provided at the distal end on the proximal end side, can be fitted to the spline shaft, and extends in the axial direction on the inner wall. This is an axial columnar body in which a plurality of holes are formed at the tip. The output unit 51 and the input unit 53 rotate with the other in the rotational direction while being engaged with each other. The motor 7 may be equipped with a speed reduction mechanism, and may be decelerated by the speed reduction mechanism and the driving force may be transmitted from the output shaft to the transmission unit.
The guide nut 11 is driven by the rotation of the screw 9 and moves on the screw 9 in the direction of the rotation axis of the screw 9. Specifically, the guide nut 11 has a cylindrical shape in which a hole is provided on the inside, a screw portion 11a in which a female screw that is screwed into the screw 9 is provided on the inside of the hole, and a screw portion from the screw portion 11a. 11a and a cylindrical portion 11b extending coaxially. The tip of the cylindrical portion 11b is fixed to the mounting member 6 that is an operating portion. As a result, the attachment member 6 moves integrally with the guide nut 11 as the guide nut 11 moves.

The inner cylinder 31 is provided inside the outer cylinder 5 and moves relative to the outer cylinder 5 in the rotation axis direction of the screw 9. The outer diameter of the inner cylinder 31 is smaller than the inner diameter of the outer cylinder 5, and the inner cylinder 31 can be advanced and retracted from the outer cylinder 5 through an opening 5 c that is a second opening provided on the distal end side of the outer cylinder 5. . Specifically, the inner cylinder 31 can be moved back and forth with respect to the outer cylinder 5 by the movement of the mounting member 6 accompanying the relative movement of the guide nut 11 with respect to the screw 9. The displacement between the state extended from 5c can be performed repeatedly.
The drive device 1 is configured so that the guide nut 11 rotates relative to the rotation of the screw 9. Specifically, since the rotation of the inner cylinder 31 is restricted and the guide is guided so as to move in the direction of the rotation axis of the screw 9, the cylindrical portion of the guide nut 11 can be obtained by rotating the screw 9 in a predetermined rotation direction. 11b moves in the direction of the rotation axis of the screw 9 so as to advance and retreat from the outer cylinder 5. When the cylindrical portion 11b moves in this way and rotates a predetermined amount in one direction around the axis of the screw 9, the inner cylinder 31 protrudes from the outer cylinder 5 so that the length of the driving device 1 is extended. By moving and rotating the screw 9 in the direction opposite to the predetermined rotation, the inner cylinder 31 can be drawn into the outer cylinder 5 so that the length of the driving device 1 can be shortened.

The drive device 1 has a lid. The lid portion has a notch-like portion provided so that the internal space communicates with the outside of the case when the opening is closed. The cover part should just be able to close at least one part of opening. In this embodiment, the lid is the lid 13.
The lid 13 will be described with reference to FIGS. 4 is a perspective view of the lid, FIG. 5 is a front view of the lid, FIG. 6 is a sectional view of the lid, FIG. 7 is a plan view of the lid, and FIG. 8 is a bottom view of the lid. The cover part 13 has the closing part 13a for closing the opening 5b, as shown in FIGS. The closing part 13a has a shape corresponding to the opening 5b, is fitted into the opening 5b, and has a substantially disk-shaped outline having the same diameter as the inner diameter of the opening 5b. The closing portion 13a can be fixed to the outer cylinder 5 by a known fixing method such as screwing, fitting, or crimping. The closing part 13a also has a function as a sealing part that holds the base part, which will be described later, out of the case by being fixed to the outer cylinder 5. Specifically, the lid portion 13 is fixed at the position by caulking the outer cylinder 5. The notch 13b has a shape in which the outer periphery of the closing part 13a is missing, and it is sufficient that at least a later-described lead-out part can be led out. It is not something. The notch may be a hole. In this embodiment, a portion extending from the base of the lead-out member is engaged with the notch 13b. Moreover, the notch-shaped part 13b is a shape which comprises three sides of a rectangle by planar view, and has a plane which faces the radial direction outer side, and a plane which faces the circumferential direction both sides.
The lid portion 13 includes, for example, a ball socket joint, and can be rotatably connected to an attachment member 49 provided at the rear portion of the vehicle 3.

The drive device 1 has a lead-out member. The lead member is a member for guiding the lead wire from the inside to the outside of the outer cylinder 5. In this embodiment, the lead-out member is a boot 15. The boot 15 is an elastic member, and is made of rubber, for example. The lead-out member has a base. The base is at least partially disposed in the internal space. In this embodiment, the base is the base 17. The base portion 17 is fixed to the outer cylinder 5 by the lid portion 13. Therefore, the opening is sealed so that the lid portion 13 does not drop the lead-out portion 19 from the outer cylinder 5. The lead member has a lead portion. The lead-out part extends from the base part and is led out to the outside through the notch-like part. The lead-out part can be arranged from one side of the lid part 13 to the other in the notch-like part.
In this embodiment, the derivation | leading-out part 19 is derived | led-out outside from the base part 17 through the notch-shaped part 13b. The lead-out portion 19 has a length, and extends from one place on the outer peripheral edge of the base portion 17 as a hollow tubular shape in parallel with the central axis of the base portion. The lead-out part 19 is engaged with the notch 13b. More specifically, a root portion 19d adjacent to the base portion 17 of the lead-out portion 19 is in close contact with the cutout portion 13b. The root portion 19d has a substantially rectangular cross section, and is fitted into the notch 13b without a gap. Thereby, the sealing performance is improved.

Details of the boot 15 will be described with reference to FIGS. 3, 9, and 10. FIG. 9 is a partial perspective view of the lead-out member. FIG. 10 is a partial perspective view showing the lead-out member and the opening of the case. The base 17 realizes the function of sealing the opening 5 b, the function of adjusting the position of the motor 7, and the function of forming a space between the motor 7.
The lead member has an insertion passage. The insertion passage communicates the lead-out portion side opening provided at the end portion of the lead-out portion opposite to the base portion and the opening-side opening provided in the base portion, and the lead wire of the drive portion is inserted therethrough. In this embodiment, the insertion passage 21 communicates the lead-out side opening 19 b provided in the end 19 a of the lead-out part 19 and the opening-side opening 19 c provided in the base 17. The lead wire 45 of the motor 7 is inserted into the insertion passage 21. The inner diameter of the insertion passage 21 is large enough to ensure a gap with the lead wire 45. Therefore, even when the boot 15 is deformed, the load acting on the lead wire 45 is reduced.

In this embodiment, the end portion 19 a of the lead-out portion 19 is supported by a part of the distal end side entering the opening portion 59 of the wall surface 57 of the vehicle 3 and engaging with the opening portion 59. The lead-out portion side opening 19 b of the lead-out portion 19 is formed on the inner peripheral surface of the end portion 19 a and communicates with the internal space of the vehicle 3. The boot 15 has a seal portion 47 that seals both sides of the opening portion 59 of the wall surface 57.
In this embodiment, the derivation | leading-out part 19 is formed in the bellows shape. Therefore, the lead-out part 19 can be deformed flexibly. The shape of the lead-out portion is not particularly limited as long as it can be deformed following the displacement of the driving device with respect to the vehicle body.

The base portion has a seal portion. The seal portion is a member that suppresses intrusion of moisture from between the case and the lid portion. In this embodiment, the seal portion 23 is an annular convex portion formed on the outer peripheral surface of the base portion 17, and is in close contact with the inner peripheral surface of the outer cylinder 5. In this embodiment, the seal portion 23 is elastically deformed in the radial direction for sealing, but a structure that is not elastically deformed may be used.
As described above, the opening 5b of the outer cylinder 5 as a case is closed by the base portion 17 of the lead-out member, the lid portion 13, and the boot 15 in which the lead-out portion 19 is disposed in the notch-like portion 13b. ing.
As shown in FIG. 3, a proximal end cap 63 may be provided. The proximal end cap 63 covers the outer periphery of the base portion 19 d of the lid portion 13 and the lead-out member 19 and the outer periphery of the proximal end portion of the outer cylinder 5. Thereby, the sealing performance of the base end side portion of the outer cylinder 5 is improved.

The base has a position adjusting unit. The position adjustment unit is a member that elastically biases the drive unit so that the drive unit is in a position where the drive force can be transmitted to the transmission unit. In this embodiment, the position adjustment unit is the position adjustment unit 25. The position adjustment unit 25 is an elastic portion formed on the surface of the base 17 on the side of the motor 7 that is a drive unit. The position adjusting unit 25 elastically biases the motor 7 toward the screw 9 and the guide nut 11 side. Therefore, the output unit 51 of the motor 7 is disposed at an appropriate position with respect to the input unit 53 extending from the screw 9. That is, by sealing the opening while pressing the base portion 17 with the lid portion, the drive portion can be disposed at a position where the drive force can be transmitted to the screw 9, and thus the size of the drive portion varies. Even if it exists, position adjustment is easy by the elasticity of a derivation | leading-out member. Further, in this embodiment, since the output shaft of the drive unit and the screw are configured to be spline-fitted, the drive unit and the screw can be relatively moved in a state where the drive force can be transmitted. Therefore, it is possible to arrange the drive unit and the screw at appropriate positions by elastic pressing of the drive unit by the lead-out member. Here, it is preferable that there is no gap between the output unit 51 and the input unit 53 in the rotation axis direction, but there may be a gap. Further, since the lead-out member has elasticity, it is also possible to absorb the vibration of the drive unit.
In this embodiment, the seal portion and the position adjustment portion are configured as separate bodies, but a structure in which one portion has both functions may be used.

  In this embodiment, the motor 7 is structured to be movable in the outer cylinder 5 along the axial direction of the outer cylinder 5. The motor 7 is supported by the buffer member in a state where a gap is left between the motor 7 and the inner peripheral surface of the outer cylinder 5. For example, a motor cap 61 as a buffer member is mounted on the outer peripheral surface of the end of the motor 7 on the opening 5b side. The motor cap 61 is made of rubber, for example. As shown in FIG. 10, the motor cap 61 has a plurality of convex portions 61a. The convex portion 61 a extends in the axial direction and is in close contact with the inner peripheral surface of the outer cylinder 5. The motor cap 61 that is an annular member facilitates the mounting of the motor 7 in the direction perpendicular to the axis of the outer cylinder 5 even if the size of the motor 7 varies due to tolerances. Intervene in between. In this way, the motor 7 is held in the vibration-proof state in the inner space 5a of the outer cylinder 5. Moreover, it becomes easy to put the motor 7 in the internal space 5 a of the outer cylinder 5 by the gap.

  In addition, the outer cylinder 5 has a lid portion 13 fixed by caulking on the inner side, and further a bearing 29 fixed by caulking. The bearing 29 is a member that rotatably supports the rotating shaft of the screw 9. When the motor 7 is mounted, the motor 7 is inserted into the outer cylinder 5, and the above two places of the outer cylinder 5 are caulked with the base portion 17 and the lid portion 13 of the boot 15 mounted in the opening 5 b. Accordingly, the motor 7 is positioned by the position adjusting unit 25 in a state in which it is always elastically biased toward the screw 9 and the guide nut 11 side.

A function for positioning the lid 13 by the boot 15 will be described. As shown in FIGS. 3, 9, and 10, two step portions 33 and 35 extending in a generally annular shape are formed on the outer plane of the base portion 17 of the boot 15. Further, two step portions 37 and 39 extending in an annular shape are formed on the inner surface of the lid portion 13. The two step portions 33 and 35 are in close contact with the two step portions 37 and 39. Thereby, the attitude | position of the base 17 of a derivation | leading-out member is stabilized, and a sealing performance improves.
In addition, the two step portions 33 and 35 of the base portion 17 of the boot 15 secure a space 55 on the motor 7 side. Thereby, the lead wire 45 extended from the motor 7 can be bent greatly.

  The coil spring 41 is disposed on the outer periphery of the guide nut 11, contacts the tip of the mounting member 6, and applies a biasing force to the mounting member 6 in the rotation axis direction. In this embodiment, the guide nut 11 is urged in a direction away from the outer cylinder 5. By applying a biasing force in the direction of the rotation axis to the inner cylinder 31 by the coil spring 41, it is possible to suppress “play” that occurs when the guide nut 11 and the screw 9 are screwed together. Can be added. As a result, for example, a time lag from the start of rotation of the motor 7 to the start of the advance / retreat operation of the guide nut 11 and the inner cylinder 31 in the rotation axis direction can be suppressed.

2. Second Embodiment An embodiment will be described in which a plurality of convex portions are provided on the peripheral surface of the base portion, and the base portion is accommodated in the internal space so that the convex portions are in contact with the inner surface of the case. In this case, the motor is centered in the case by the base of the lead-out member, and further, a vibration isolation effect for the motor is realized.
The second embodiment will be described with reference to FIG. FIG. 11 is a cross-sectional view of the vicinity of the opening of the case in the second embodiment. In the second embodiment, the position adjusting unit 25 and the motor cap 61 in the first embodiment are integrally formed. That is, in this embodiment, the base portion 17 has the motor cap 61. A plurality of convex portions 61 a are formed on the peripheral surface of the motor cap 61, and the base portion 17 is accommodated in the internal space 5 a so that the convex portions 61 a abut against the inner surface of the outer cylinder 5. The convex portion 61 a extends in the axial direction and is in close contact with the inner peripheral surface of the outer cylinder 5.

3. Other Embodiments Although a plurality of embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the scope of the invention. In particular, a plurality of embodiments and modifications described in this specification can be arbitrarily combined as necessary.

  The present invention can be widely applied to driving devices and opening / closing mechanisms.

1: Drive device 2: Opening and closing body 3: Vehicle 5: Outer cylinder 5a: Internal space 5b: Opening 6: Mounting member 7: Motor 8: Boot 9: Screw 11: Guide nut 13: Lid 13a: Closure 13b: Cut Notch 15: Boot 17: Base 19: Deriving part 19a: End 19b: Deriving part side opening 19c: Opening side opening 21: Insertion passage 23: Seal part 25: Position adjusting part

Claims (4)

A case having an internal space and an opening provided so that the internal space communicates with the outside, an operating part that moves relative to the case, and a drive part that is housed in the internal space and operates the operating part And a drive unit including a transmission unit that transmits a driving force of the drive unit to the operation unit, and a lid unit that closes the opening,
The lid portion has a notch-like portion provided so that the internal space communicates with the outside of the case when the opening is closed;
The drive device further includes a derivation member having a base part at least partially arranged in the internal space, and a derivation part extending from the base part and led out to the outside through the notch-shaped part,
The lead-out member communicates a lead-out portion side opening provided at an end of the lead-out portion and an opening-side opening provided in the base portion, and has an insertion passage through which a lead wire of the drive portion is inserted.
The base portion is elastically biased so that a seal portion that suppresses intrusion of moisture from between the case and the lid portion and a position where the driving portion can transmit a driving force to the transmitting portion. And a position adjusting unit.   The drive device according to claim 1, wherein the base has a plurality of convex portions on a peripheral surface of the base portion, and the base portion is accommodated in the internal space so that the convex portions are in contact with an inner surface of the case.   The drive device according to claim 1, wherein the lead-out portion is formed in a bellows shape.   A drive device according to any one of claims 1 to 3, an opening / closing body, and a fixed object whose position is fixed by the drive device, wherein the opening / closing body is driven by driving of the drive device. An opening / closing mechanism in which a proximal end of the driving device is connected to the fixed object, a distal end of the driving device is connected to the opening / closing body, and the opening / closing body is opened / closed.

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