JP3627744B2 - Opening and closing body drive device - Google Patents

Abstract

A structure capable of realizing a small-sized drive device for an opening/closing body. A drive device for an opening/closing body has a rotatably supported drive drum (51), a transmission member (31) that transmits the rotation of the drive drum (51) to an opening/closing body (1), a motor (6) that produces a drive force for the drive drum (51), a speed reduction mechanism (8) that is provided in a drive force transmission route between the motor (6) and the drive drum (51), and a clutch mechanism (9) that, in operation, transmits the drive force of the motor (6) to the drive drum (51) and, in non-operation, shuts off the transmission of the drive force of the motor (6) to the drive drum (51). The speed reduction mechanism (8) and the clutch mechanism (9) are arranged on a drive shaft (7) driven by the motor (6), and the speed reduction mechanism (8), the clutch mechanism (9), and the motor (6) are arranged radially inward of the drive drum (51).

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a drive device that opens and closes an opening / closing body provided on a vehicle or the like so as to be freely opened and closed.
[0002]
[Prior art]
Conventionally, this type of driving device is used in a device that opens and closes a sliding door of a vehicle, and slides the door attached to an entrance formed on the body of the vehicle. Such a drive device transmits an electric drive source such as a motor that generates a drive force acting on the slide door and the drive force from the electric drive source to the slide door when the connection state is activated, and in the disconnected state, A clutch mechanism that interrupts transmission of driving force from the mechanical drive source to the slide door, and a cable that is interposed between the electrical drive source and the slide door and serves as a power transmission means.
[0003]
When the sliding door is slid with the driving force of the electric drive source, the clutch mechanism is operated in the connected state (the clutch mechanism is turned on) to transmit the driving force of the electric drive source to the sliding door. (Clutch function of the opening / closing drive device). In addition, when the occupant manually operates the sliding door directly to perform the sliding operation, the clutch mechanism is brought into a connected / disconnected state (the electromagnetic clutch mechanism is turned off), and the electric drive source in the stopped state is used for the sliding operation of the sliding door. On the other hand, the sliding door can be opened and closed with a light operating force so as not to become a load (clutch function of the opening / closing drive device). In addition, when the sliding door is manually slid, if the sliding speed of the sliding door exceeds a predetermined value, the brake operates as a braking mechanism to apply a braking force to the sliding door. Due to the sliding door's own weight due to the sliding motion when parked, the occupant is prevented from sliding at an unexpected speed. That is, it is a device that controls the sliding operation speed of the sliding door (see, for example, Patent Document 1).
[0004]
In the prior art that achieves the above function, the electromagnetic clutch mechanism and the worm wheel gear are disposed on a rotating shaft that is integrally formed with the driving drum, and the worm wheel gear is provided on a rotating shaft that is integrally formed with the driving drum. On the other hand, the driving force from the electric driving source is input by the worm.
[0005]
[Patent Document 1]
JP 2002-327576 A [0006]
[Problems to be solved by the invention]
However, in the configuration according to the above-described prior art, the electric drive source, the clutch mechanism, and the drive drum have separate rotating shafts because the driving force of the electric drive source is transmitted to the worm wheel gear by the worm gear. Therefore, there are problems that the number of parts is large and the drive device is enlarged.
[0007]
Therefore, the problem to be solved by the present invention is to realize a configuration capable of realizing a small opening / closing body driving device.
[0008]
[Means for Solving the Problems]
A first technical means taken in order to solve the above problems is a driving drum including a frame and a transmission member rotatably supported by the frame and transmitting a driving force to the opening / closing body on an outer peripheral portion. When,
A driving motor that generates a driving force for the driving drum; a speed reduction mechanism that is disposed between the driving motor and the driving drum and transmits the driving force from the motor to the driving drum; and disposed between the driving motor and the driving drum. And a clutch mechanism that transmits a driving force of the driving motor to the driving drum via the speed reduction mechanism during operation and interrupts transmission of the driving force from the driving motor to the driving drum during non-operation. In the drive device,
The reduction mechanism and the clutch mechanism is disposed on the drive shaft with said drive motor, and said speed reduction mechanism is to the clutch mechanism and the drive motor is arranged on the inner diameter side of the drive drum.
[0009]
The speed reduction mechanism and the clutch mechanism arranged on the single drive shaft and on the inner diameter side of the drive drum operate so as to control the transmission of the driving force to the opening / closing body or the acting force from the opening / closing body side.
[0010]
In addition to the first means, the second technical means provided in the present invention includes an internal gear formed on an inner diameter portion of the drive drum, and an internal gear that meshes with the internal gear. And an external gear that is rotatable on an eccentric shaft portion provided on the rotating shaft.
[0011]
With this configuration, the rotation of the drive motor operates so as to be transmitted to the drive drum at a large reduction ratio (a high rotation speed is significantly converted into a low rotation speed).
[0012]
Further, according to the third technical means taken in the present invention, in addition to the second means, the clutch mechanism includes a solenoid device supported by the frame body, and restricts rotation when the solenoid device is operated. And a rotating disk that is allowed to rotate freely during non-operation, and the rotating disk and the external gear are engaged with each other.
[0013]
With this configuration, the rotation of the external gear is controlled by controlling the current to the solenoid device of the clutch mechanism.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment embodying the present invention will be described with reference to FIGS.
[0015]
As shown in FIGS. 1 and 2, the sliding door 1 of the vehicle has a similar configuration, and is mounted so as to open and close with respect to an entrance 11 formed in the side body 10 of the vehicle. A center guide rail 12 and a pair of upper and lower upper and lower guide rails 13 and 14 are attached to the side body 10 so as to extend in the front-rear direction (the left-right direction in FIG. 1). , 14 is slidably supported along the position 14, and the posture is maintained.
[0016]
Further, as shown in FIGS. 1 and 2, the opening / closing device 3 serving as an operating mechanism of the slide door 1 has a drive device 4 attached to the slide door 1 together with the guide rails 12, 13, and 14. A cable 31 (transmission member) composed of two wires 31a and 31b wound or sent out by the drive device 4 is provided. A pulley mechanism 32 including a pair of pulleys 32 a and 32 b is arranged to link the slide door 1 and the center guide rail 12 together. Each of the wires 31a and 31b is wound at one end thereof on a driving drum 51 (FIG. 3) described later of the driving device 4, and the other end is guided by the pulley mechanism 32 and routed in the center guide rail 12. The center guide rail 12 is locked to the side body 10 in the vicinity of the front end in the vehicle longitudinal direction. The other end of the wire 31b is guided by the pulley mechanism 32 and routed in the center guide rail 22, and is locked to the rear end of the center guide rail 22 in the vehicle front-rear direction.
[0017]
Next, the drive device 4 which is the main part of the present invention will be described with reference to FIGS.
[0018]
The drive device 4 includes a base 45 that is fixedly mounted in the slide door 1 and a housing 44 (frame body) that is further fixed to the base 45. The housing 44 has a cylindrical portion 44a, the drive drum 51 through the inner surface in sliding contact bearing 5 second cylindrical portion 44a is rotatably supported.
[0019]
A spiral groove 51a is formed on the outer periphery of the drive drum 51, and wires 31a and 31b are wound around the groove 51a. When the drive drum 51 rotates in one direction, one of the wires 31a and 31b is wound and the other is sent out. Also, when the rotation is reversed, the winding and feeding are reversed. As a result, the slide door 1 is configured to slide.
[0020]
Located on the inner diameter side of the cylindrical portion 44a of the housing 44, a drive motor 6 is disposed. The drive motor 6 includes a cylindrical motor housing 64 that is fixed to the base 45 inside the housing 44. The housing 64 includes a bottom portion 64b with respect to the cylindrical portion 64a, and a hole is provided in the center portion of the bottom portion 64b. One end of the drive shaft 7 of the drive motor 6 is supported through a ball bearing inserted into the hole. In addition, most of the cylindrical portion 64 a of the motor housing 64 is configured to be stored in a space provided on the inner diameter side of the drive drum 51. The drive shaft 7 has a configuration in which a shaft portion 71 and a support portion 72 are fixedly mounted on the outer periphery of the shaft portion 71. One end of the shaft center portion 71 is provided with a knurled portion 74 that extends into the motor housing 64 and has irregularities formed on the outer periphery thereof. A rotor 61 of the drive motor 6 is fixedly attached to the knurled portion 74 by resin integral molding. The rotor 61 includes a core 68 made of a magnetic material, a coil 67 wound around the core 68, and a commutator 75 for supplying current to the coil 67. Further, the other end of the drive shaft 7 is rotatably supported via a bearing in the housing 44. Further , the drive motor 6 includes a magnet 66 fixed to the inner diameter surface of the motor housing 64. When the current is supplied to the coil 67 of the rotor 61 through the brush 76 that is attached to the base 45 and is urged by the spring 77, the drive motor 6 is rotated. The brush 76 is supplied with a current from a terminal 78, and the current is supplied based on a predetermined control mode to be described later.
[0021]
Further, as shown in FIGS. 3 and 4, there is provided a speed reduction mechanism 8 that transmits the driving force to the driving drum 51 by reducing the rotational speed of the driving force from the driving shaft 7 to a large torque. The speed reduction mechanism 8 includes an internal gear 53 formed on the inner diameter surface of the drive drum 51 and an external gear 81 that is supported by the drive shaft 7 and meshes with the internal gear 53. The external gear 81 is rotatably supported by an eccentric shaft portion 73 formed with its center axis eccentric from the rotation shaft of the drive shaft 7 provided on the drive shaft 7, and the number of teeth is the number of teeth of the internal gear 53. At least one less than the number is set.
[0022]
Next, the configuration of the clutch mechanism 9 will be described.
[0023]
The clutch mechanism 9 includes a solenoid device 97 fixedly attached to the bottom 44 a of the housing 44, and a turntable 92 disposed so as to oppose one surface of the solenoid device 97. The turntable 92 is supported by the drive shaft 7 so as to be rotatable and movable in the axial direction of the drive shaft 7. When the solenoid device 97 is energized and activated, it is attracted to the solenoid device 97. The rotating disk 92 is supported by a portion of the drive shaft 7 that is not eccentric.
[0024]
Then, as will be described later, according to a predetermined operation mode according to a command from the control device 2, when the solenoid device 97 is energized, the rotating disk 92 operates so as to be attracted by the solenoid device 97. The control of the attractive force is performed by, for example, a PWM method, that is, a method of controlling the amount of current by changing the time of energization supplied in a pulse-like manner divided into short times. By controlling the amount of current during energization, the frictional force between the rotating disk 92 and the solenoid device 97 can be changed. When no current is supplied to the solenoid device 97, there is no suction force of the solenoid device 97 against the rotating plate 92, and the rotating plate 92 can freely rotate with respect to the solenoid device 97. On the other hand, when current is supplied to the solenoid device 97, the rotating disk 92 is fixed to the housing 44 via the solenoid device 97 within the range of a predetermined driving force of the driving device 4. .
[0025]
An external gear 81 is disposed opposite to the side surface of the rotating disk 92 opposite to the solenoid device 97 side. A plurality of pins 93 are erected on the side surface of the turntable 92. The plurality of pins 93 are respectively inserted into the plurality of holes 82 formed in the external gear 81. The inner diameter of the hole 82 is set to be larger than the outer diameter of the pin 93, and the rotating disk 92 and the external gear 81 can move relative to each other in the radial direction perpendicular to the rotation axis by the amount of the gap generated between them. This movable amount corresponds to the eccentric amount of the eccentric shaft portion 73 of the drive shaft 7 that supports the external gear 81.
[0026]
As shown in FIG. 3, the control device 2 is attached to the base 45. The control device 2 includes a base 20 loaded with electronic elements (not shown), and controls the drive device 4 based on a predetermined control mode. As an input device to the control device 2, a rotation sensor 21 attached to the base 20, and a magnet 22 is attached to the drive drum 51 against the rotation sensor 21 so that the rotation speed of the drive drum 51 can be input. Yes. The control device 2 is configured to calculate a slide operation speed, a slide operation direction, a current position, and the like of the slide door 1 based on a signal from the rotation sensor 21 and to control an operation described later.
[0027]
The entire drive device 4 including the control device 2 is not only compactly configured, but also has the advantage of reducing the influence of noise and ensuring operation reliability because the signal from the rotation sensor 21 is input without wiring. There is.
[0028]
The operation of the drive device 4 configured as described above will be described in relation to the sliding operation of the sliding door 1.
[0029]
First, when the sliding door 1 is slid, a predetermined current is supplied so as to completely fix the rotating disk 92 to the solenoid device 97 of the clutch mechanism 9. In this state, current is supplied to the drive motor 6 and the drive shaft 7 rotates. The eccentric shaft portion 73 of the drive shaft 7 that supports the drive shaft 7 rotates around the rotation axis of the drive shaft 7. As the eccentric shaft portion 73 rotates, the meshing position of the external gear 81 whose rotation is restricted by the pin 9 of the fixed rotating disk 92 and the internal gear 53 of the drive drum 51 rotates. When the meshing position rotates once, the drive drum 51 rotates by an angle corresponding to the difference in the number of teeth of the external gear 81 and the internal gear 53. By the rotation of the driving drum 51, one of the two wires 31 a and 31 b wound around the driving drum 51 is wound around the driving drum 51 and the other is sent out from the driving drum 51. Then, the slide door 1 is slid.
[0030]
In the speed reduction mechanism 8, the number of teeth of the external gear 81 and the internal gear 53 can be increased and the difference in the number of teeth can be reduced, so that the rotational speed can be greatly reduced. There is an advantage that it can be downsized as a high-speed rotation type.
[0031]
With the above configuration, when a large load is applied to the slide door 1 when the slide door 1 is electrically operated to slide, the load is more than the frictional force between the solenoid device 97 of the clutch mechanism 9 and the rotating disk 92. is Ru Oh possibility of increases. At this time, slip occurs between the solenoid device 97 and the rotating disk 92, and the rotating disk 92 rotates. As a result, since the external gear 81 rotates on the eccentric shaft portion 73, the driving force is not transmitted from the drive motor 6 to the slide door 1. Thereby, the damage by the heavy load to the drive device 4 is prevented.
[0032]
When there is no power supply to the solenoid device 97, the rotation disk 92 and the external gear 81 are freely controlled while being connected to each other without being restricted in rotation. When the passenger in this state Ru is called manually slid sliding operation of the slide door 1, the cable 31a with the slide operation sliding door 1, the drive drum 51 and the external gear 81 via 31b is rotated, the drive shaft 7 does not rotate. Therefore, the drive motor 6 can slide the sliding door 1 with a light operating force without being a load.
[0033]
On the other hand, during the manual slide operation of the slide door 1 (including not only the manual slide operation but also an inadvertent slide operation on a hill or the like), the slide door is detected by the output signal of the rotation sensor 21 that detects the rotation speed of the drive drum 51. When it is detected that the sliding operation speed of 1 is equal to or higher than a predetermined value, a predetermined current is supplied to the solenoid device 97 of the clutch mechanism 9 to frictionally engage the solenoid device 97 and the rotating plate 92. . As a result, the clutch brake mechanism 9 enters a braking state, and a braking force is applied against the sliding operation of the sliding door 1. As a result, the sliding operation of the sliding door 1 is braked, and the sliding operation speed of the sliding door 1 is kept below a predetermined speed.
[0034]
【The invention's effect】
According to the present invention, the speed reduction mechanism and the clutch mechanism are arranged on the drive shaft of the drive motor, and the number of parts is reduced and the configuration is simplified because the drive mechanism is driven to drive the drive drum. Further, the drive motor, the speed reduction mechanism, and the clutch mechanism can be reduced in size by being arranged on the inner side of the drive drum.
[Brief description of the drawings]
FIG. 1 is a side view showing a state in which a drive device of the present invention is mounted on a sliding door of a vehicle.
2 is a cross-sectional view taken along a line AA in FIG.
FIG. 3 is a cross-sectional view of the drive device of the present invention.
4 is a cross-sectional view taken along a line BB in FIG. 3;
[Explanation of symbols]
1 Opening and closing body (sliding door)
4 Drive device 6 Drive motor 7 Drive shaft 8 Deceleration mechanism 9 Clutch mechanism 31 Transmission member (cable)
44 Frame (housing)
51 Drive Drum 53 Internal Gear 73 Eccentric Shaft 92 Turntable 97 Solenoid Device

Claims (3)

A frame,
A driving drum that is rotatably supported by the frame body and includes a transmission member that transmits a driving force to the opening and closing body on the outer periphery;
A drive motor for generating a drive force for the drive drum;
A speed reduction mechanism disposed between the drive motor and the drive drum and transmitting a drive force from the motor to the drive drum ;
The driving force of the driving motor disposed between the driving motor and the driving drum is transmitted to the driving drum via the speed reduction mechanism during operation, and the driving force is transmitted from the driving motor to the driving drum when not operating. In a driving device for an opening / closing body comprising a clutch mechanism for shutting off,
An opening / closing body in which the speed reduction mechanism and the clutch mechanism are disposed on a drive shaft provided in the drive motor, and the speed reduction mechanism, the clutch mechanism, and the drive motor are disposed on an inner diameter side of the drive drum. of the drive unit. The speed reduction mechanism includes an internal gear formed on an inner diameter portion of the drive drum, and an external gear meshed with the internal gear and rotatable on an eccentric shaft portion provided on the rotary shaft. The opening-closing body drive device of Claim 1 provided. The clutch mechanism includes a solenoid device supported by the frame body, and a turntable that is restricted in rotation when the solenoid device is operated and is allowed to rotate freely when the solenoid device is not operated. The opening / closing body driving device according to claim 2, wherein the opening / closing body is configured to engage with a toothed gear.

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