JP2008127950A - Driving gear to open/close car door - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide driving gear to open or close a car slide door, where the clutch can be omitted in the transmission route of rotation force from a motor to the slide door. <P>SOLUTION: In the driving gear, an output drum 42 driving a cable 31 to open and close a car slide door is connected to drive the wheel 45 of a face gear 46, and the pinion 43 of the face gear 46 is connected to drive the rotary shaft of a motor 41, while the rotation force of the motor 41 is transmitted to the slide door through a cable 31 for driving the slide door to open and close it. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an opening / closing drive device for a vehicle opening / closing part.

2. Description of the Related Art Various types of opening / closing drive devices for a vehicle opening / closing unit have been known.
For example, in Patent Document 1, an open / close driving device for a vehicle opening / closing body that outputs rotation of a rotating shaft of a motor via a worm and a worm wheel in order to drive an opening / closing body provided in a vehicle, A clutch that allows the opening and closing of the opening / closing body to be driven by a motor in the connected state, and allows the worm to rotate when the opening / closing body is manually opened and closed in the disconnected state; There has been proposed one provided with detection means for detecting the rotational position of the worm corresponding to the opening / closing position of the body.

On the other hand, in Patent Document 2, in a control device for a power slide door for a vehicle, a brushless motor connected to the power slide door via an interlocking mechanism and a plurality of signals that output a signal corresponding to the rotation angle of the rotor portion of the brushless motor. A magneto-electric conversion element, a drive circuit that opens and closes the power slide door, and a control circuit that controls the operation of the drive circuit to control the opening and closing direction and speed of the power slide door. A control circuit has been proposed in which a control circuit is mounted on a substrate and the substrate is built in a case of a brushless motor.
JP 2004-183409 A JP 2002-349137 A

By the way, in Patent Document 1, a clutch is required to reduce the operating force during manual operation, which complicates the structure and increases the cost.
On the other hand, in Patent Document 2, by incorporating a control circuit in the case of a brushless motor, when there is a difference in specifications due to vehicle model development, etc., the variation of the actuator increases for each specification, and depending on the required specification, Major changes such as a larger case occur, making it difficult to share the same actuator. In addition, by adopting a brushless motor, it is also proposed to provide a clutch for connecting and disconnecting the brushless motor and the power slide door, although the load when rotating the rotating shaft from the outside can be reduced. Yes.

  An object of the present invention is to provide an opening / closing drive device for an opening / closing part for a vehicle that can omit a clutch in a transmission path of torque from the motor to the opening / closing part.

  In order to solve the above-mentioned problems, the invention according to claim 1 is an open / close driving device for a vehicle opening / closing unit that opens / closes a vehicle opening / closing unit, and includes a drive unit that drives a transmission band that opens / closes the opening / closing unit. Drive and connect to the wheel of the cross-shaft gear and drive and connect the pinion of the cross-shaft gear to the rotating shaft of the motor and transmit the rotational force of the motor to the opening and closing portion via the transmission band to drive the opening and closing of the opening and closing portion. The gist is to do.

  According to this configuration, the transmission of the rotational force of the motor to the opening / closing portion via the transmission band is driven and connected to the pinion of the cross shaft gear that is drivingly connected to the rotating shaft of the motor and the driving portion. This is done via the wheel of the cross shaft gear. In this case, since the transmission efficiency in the rotational direction of the cross shaft gear is larger than the transmission efficiency in the rotational direction of the worm gear, for example, when the opening / closing part is manually opened and closed when the motor is stopped. Even if it exists, rotation transmission will be performed efficiently in the cross shaft gear, and the opening / closing part can be opened and closed while rotating the motor (rotating shaft) with a slight operating force. Therefore, it is not necessary to provide a clutch for connecting and disconnecting the rotational force in the rotational force transmission path from the motor to the opening / closing portion, and the clutch can be omitted.

  According to a second aspect of the present invention, in the opening / closing drive device for a vehicle opening / closing part that drives the opening / closing part of the vehicle to open / close, the driving part that drives the transmission band that opens / closes the opening / closing part is connected to the wheel of the high void gear. The gist is to drive and connect a pinion of a high void gear to a rotating shaft of a motor and transmit the rotational force of the motor to the opening / closing portion via the transmission band to drive the opening / closing portion.

  According to this configuration, the transmission of the rotational force of the motor to the opening / closing part via the transmission band is performed by the pinion of the high void gear that is drivingly connected to the rotating shaft of the motor and the high void gear that is drivingly connected to the driving part. Done through the wheel. In this case, since the transmission efficiency in the rotational direction of the high void gear is larger than the transmission efficiency in the rotational direction of the worm gear, for example, the opening / closing part is manually opened and closed when the motor is stopped. However, rotation transmission is efficiently performed in the high void gear, and the opening / closing portion can be opened and closed while rotating the motor (rotating shaft) with a slight operating force. Therefore, it is not necessary to provide a clutch for connecting and disconnecting the rotational force in the rotational force transmission path from the motor to the opening / closing portion, and the clutch can be omitted.

The gist of the invention according to claim 3 is that the drive part and the wheel are integrally formed in the opening / closing drive device for the opening / closing part for a vehicle according to claim 1 or claim 2.
According to this configuration, the number of parts and the manufacturing process can be reduced by integrally forming the drive unit and the wheel. In addition, since the drive unit and the wheel are integrally formed, the drive unit can supplement the part that was originally necessary for maintaining the strength of the wheel alone. Compactness is possible.

  The invention according to claim 4 is the opening / closing drive device for the vehicle opening / closing part according to claim 1 or 2, further comprising suppression means for suppressing a relative position change between the pinion and the wheel. And

  According to this configuration, the restraining means can restrain the relative position change between the pinion and the wheel, can prevent tooth escape at the meshing part of the pinion and the wheel, and can transmit the rotation smoothly. It can be performed.

  According to a fifth aspect of the present invention, in the opening / closing drive device for a vehicle opening / closing part that transmits the rotational force of the rotating shaft of the motor to the opening / closing part to drive the opening / closing part. The gist of the invention is to control the motor so that the moving speed of the opening / closing portion decreases before a predetermined period at the end.

  The gist of a sixth aspect of the present invention is that the opening / closing drive device for a vehicular opening / closing section according to the fifth aspect reduces the rotational speed of the motor when the moving speed of the open / close section is decreased.

  According to each of the above-described configurations, it is necessary to provide a clutch for reducing the operating speed by reducing the moving speed of the opening / closing part before the predetermined period of time when the opening / closing part opening operation or the closing operation ends. And the clutch can be omitted.

The gist of the seventh aspect of the invention is that, in the opening / closing drive device for the vehicular opening / closing section according to the fifth aspect, the motor is capable of power running control and regenerative control.
According to this configuration, the opening / closing drive device can be stopped while applying a braking force, for example, by regenerative control of the motor.

  According to the first to seventh aspects of the present invention, it is possible to provide an opening / closing drive device for a vehicle opening / closing section that can omit the clutch in the transmission path of the rotational force from the motor to the opening / closing section.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, an embodiment of the invention will be described with reference to the drawings.
1 and 2 are a side view and a cross-sectional view showing a vehicle on which the opening / closing drive device for a vehicle opening / closing part according to the present embodiment is mounted. As shown in the figure, a sliding door 1 as a vehicle opening / closing portion includes a center guide rail 21 extending in the vehicle front-rear direction (left-right direction in FIG. 1), a pair of upper and lower upper guide rails 22 and a lower guide rail. A rectangular body formed on the side body 2 in accordance with the sliding motion and supported in a vehicle front-rear direction along the guide rails 21-23. Open and close the entrance 2a.

  The center guide rail 21 is fixed to the outdoor surface of the side body 2 on the vehicle rear side from the entrance 2a. Further, the upper guide rail 22 is disposed in the vicinity of the upper edge along the upper edge of the entrance 2 a and is fixed to the side body 2. The lower guide rail 23 is disposed in the vicinity of the lower edge along the lower edge of the entrance 2 a and is fixed to the side body 2.

  Three guide roller units 11 that are slidably guided by the respective guide rails 21 to 23 are slidably supported on the slide door 1, and each guide roller unit 11 is supported by the slide door 1. By sliding with respect to the guide rails 21 to 23, the guide rails 21 to 23 are guided to slide to open and close the entrance / exit 2a. The guide rails 21 to 23 are parallel to each other, and their front ends guide the slide door 1 so that the slide door 1 is substantially flush with the outdoor surface of the side body 2 when the entrance 2a is closed. Therefore, it is bent toward the vehicle interior. Further, when the entrance / exit 2a is opened, the slide door 1 is disposed on the outdoor surface of the side body 2 on the vehicle rear side from the entrance / exit 2a.

Next, the power slide unit 3 that slides the slide door 1 will be described.
As shown in FIG. 2, the power slide unit 3 includes a driving device 4, a cable 31 as a transmission band made up of two wires 31a and 31b, and a pulley mechanism 32 made up of a pair of pulleys 32a and 32b. Configured.

  The drive device 4 is disposed in the slide door 1 and is fixed to the slide door 1 with a bracket or the like. The driving device 4 includes a motor 41 formed of a brush motor and an output drum 42 as a driving unit that drives the cable 31. The output drum 42 is formed of a resin material.

  The two wires 31 a and 31 b of the cable 31 are respectively engaged with the output drum 42 of the driving device 4 at one end and wound around the output drum 42. The other end of the wire 31a is guided by the pulley mechanism 32 and routed in the center guide rail 21, and is locked to the side body 2 near the front end of the center guide rail 21 in the vehicle front-rear direction. . The other end of the wire 31b is guided by the pulley mechanism 32 and routed in the center guide rail 21, and is locked to the rear end of the center guide rail 21 in the vehicle front-rear direction. In order to guide the two wires 31a and 31b by the pulley mechanism 32, the two wires 31a and 31b are routed to the pulleys 32a and 32b so as to intersect each other between the pair of pulleys 32a and 32b of the pulley mechanism 32. It is made in.

  When the output drum 42 rotates, one of the two wires 31a and 31b wound around the output drum 42 is wound around the output drum 42 and the other is sent out from the output drum 42, and the output drum 42 (drive) The slide door 1 on which the device 4) is arranged is pushed and pulled with respect to the side body 2, and the slide door 1 slides.

  Next, the drive device 4 will be further described with reference to FIGS. 3, 4 and 5. As shown in the figure, the drive device 4 includes a box-shaped housing 40 made of a resin material that has an outer shape and is fixed to the slide door 1 with a bracket or the like. The motor 41 is attached to the outer surface of the housing 40, and a pinion 43 made of a metal material fixed to the rotating shaft of the motor 41 and connected to the rotating shaft is rotatable. Has been inserted. Further, the housing 40 accommodates a shaft 44 whose both ends are rotatably supported by a pair of opposing wall portions and are not movable in the axial direction, and is integrally rotated with the shaft 44. A disk-shaped wheel 45 made of a fixed resin material and the output drum 42 are accommodated.

  The wheel 45 that is drivingly connected to the output drum 42 via the shaft 44 constitutes a face gear 46 as a hypoid gear together with the pinion 43. That is, the wheel 45 (shaft 44) has an axis O2 extending in a direction different from the axis O1 of the pinion 43. The axis O2 of the wheel 45 is set to be orthogonal to the axis O1 of the pinion 43 at a position offset in the radial direction (see FIG. 4). A tooth portion 45 a that meshes with a tooth portion 43 a formed on the outer peripheral surface of the pinion 43 is formed on the annular surface of the wheel 45 facing the pinion 43. In addition, the tooth part 43a and the tooth part 45a meshing with the tooth part 43a constitute a so-called helical gear according to the above-described offset in the radial direction. Further, the outer diameter of the output drum 42 is set so as not to be at least smaller than the outer diameter of the wheel 45. This is because the force acting on the tooth portion 45a of the wheel 45 from the pinion 43 is received by the output drum 42 over the entire rear surface of the wheel 45 due to the meshing with the pinion 43, and the tooth portion 45a is deformed. This is to suppress (suppressing means). However, the outer diameter of the output drum 42 is set to be smaller than the outer diameter of the wheel 45 depending on the combination of required specifications (design specifications) and the material and shape of the output drum 42 (for example, having strength by thickness). May be.

  In such a configuration, when the rotation shaft of the motor 41 is rotationally driven, the rotational force is transmitted to the output drum 42 via the pinion 43 and the wheel 45 (face gear 46), and the cable 31 is further connected to the output drum 42. To the sliding door 1. Thereby, the sliding door 1 is driven to open and close.

  On the other hand, when the opening and closing of the slide door 1 is manually operated in the drive stop state of the motor 41, the wheel 45 rotates integrally with the output drum 42 that rotates in accordance with the winding of the cable 31, and the The pinion 43 rotates (idling) together with the rotation shaft of the motor 41.

  Here, the characteristics of the face gear 46 will be described. FIG. 6 is a comparative view showing the characteristics of the face gear 46 in comparison with the conventional worm gear. As shown in the figure, in terms of operation characteristics, the worm gear moves while sliding, whereas the face gear 46 has less sliding. In terms of transmission efficiency in the rotational direction, the worm gear is 50-60%, while the face gear 46 is sufficiently large, 85-90%. That is, the face gear 46 has a large transmission efficiency in the rotational direction sufficient to be differentiated from the worm gear. The load when the rotation shaft of the motor 41 is rotated from the outside in the face gear 46 may be very small compared to the load in the worm gear. Thereby, rotation of the rotating shaft of the motor 41 accompanying manual operation of the slide door 1 is realized through the face gear 46 with high efficiency, and the operating force at this time is also reduced.

  Next, the electrical configuration of the present embodiment will be described. As shown in FIG. 7, the motor 41 is electrically connected to an ECU (electronic control unit) 50 that controls the motor 41, and the ECU 50 detects an opening / closing operation of the slide door 1. A switch 51 and a sensor 52 for detecting the open / close position of the slide door 1 are electrically connected. When the opening / closing operation of the slide door 1 is detected by the switch 51, the ECU 50 starts energization of the motor 41 so as to open / close the slide door 1 according to the detected opening / closing operation. In the present embodiment, the ECU 50 detects the opening / closing position corresponding to a predetermined period before the end of the opening operation when the slide door 1 reaches the fully open state or the end of the closing operation when the slide door 1 reaches the fully closed state by the sensor 52. Then, the motor 41 is controlled so that the moving speed (opening / closing speed) of the slide door 1 is lowered. Specifically, the rotational speed of the motor 41 is decreased, and the moving speed of the slide door 1 is decreased. This is to prevent pinching by the slide door 1. In addition, noise generation at the end of the opening / closing operation of the slide door 1 can be suppressed.

As described above in detail, according to the present embodiment, the following effects can be obtained.
(1) In the present embodiment, the transmission of the rotational force of the motor 41 to the slide door 1 via the cable 31 is transmitted to the pinion 43 of the face gear 46 connected to the rotation shaft of the motor 41 and the output. This is done via a wheel 45 of the face gear 46 that is drivingly connected to the drum 42. In this case, since the transmission efficiency in the rotation direction of the face gear 46 is larger than the transmission efficiency in the rotation direction of the worm gear, for example, the sliding door 1 is manually opened and closed when the motor 41 is stopped. Even in this case, rotation transmission is efficiently performed in the face gear 46, and the load when rotating the rotating shaft of the motor 41 from the outside can be remarkably reduced, with a slight operating force. The sliding door 1 can be opened and closed while rotating the motor 41 (rotating shaft). Therefore, it is not necessary to provide a clutch for connecting and disconnecting the rotational force in the rotational force transmission path from the motor 41 to the slide door 1, and the clutch can be omitted. As the number of parts is reduced, the entire apparatus can be made more compact, and the structure can be simplified to reduce the cost.

  (2) In the present embodiment, the clutch for reducing the operating speed by reducing the moving speed of the sliding door 1 before the predetermined period of time when the opening operation of the sliding door 1 or the closing operation ends. And the clutch can be omitted.

  (3) The arrangement relationship of the two axes (pinion 43 and wheel 45) related to the reduction of the face gear 46 is similar to the arrangement relationship of the two axes (worm and worm wheel) related to the reduction of the conventional worm gear. The power slide unit 3 can be deployed without greatly changing the vehicle mounting conditions.

In addition, you may change the said embodiment as follows.
In the embodiment, the axis O2 of the wheel 45 (shaft 44) may be set to be orthogonal to the axis O1 of the pinion 43. In this case, the wheel 45 constitutes a face gear as a cross shaft gear together with the pinion 43. The pinion 43 may be a spur gear. Even if it changes in this way, the effect similar to the said embodiment is acquired.

As the cross shaft gear, a bevel gear, a spiral bevel gear, a zero roll bevel gear, or the like may be adopted.
In the above embodiment, the output drum 42 may be formed of a metal material. Similarly, the wheel 45 may be formed of a metal material.

  In the embodiment, the output drum 42 and the wheel 45 may be integrally formed. Specifically, the tooth portion of the face gear wheel is formed on the end face of the output drum made of a metal material or a resin material, and these are integrally formed. In addition, since the tooth part of the wheel is a structure that can be removed with the upper and lower molds, it is not necessary to add a complicated slide mold or the like, and only a gear shape corresponding to the tooth part is added to the conventional mold of the output drum. It can respond. By changing in this way, the number of parts and the manufacturing process can be reduced, and as a result, the cost can be reduced. Further, since the output drum 42 and the wheel 45 are integrally formed, a portion originally necessary for maintaining the strength of the wheel 45 alone can be supplemented by the wheel 45. The wheel 45 as a whole can be made more compact.

Alternatively, a wheel made of a metal material may be insert-molded on an output drum made of a resin material to integrally form them.
In the above embodiment, the shaft 44 may be fixed to the housing 40, and the output drum 42 and the wheel 45 that are drivingly connected may be rotatably supported by the shaft 44.

  -In the said embodiment, you may provide the appropriate suppression means which suppresses the relative position change of the said pinion 43 and the said wheel 45. FIG. Specifically, as shown in FIG. 8, a round bar-shaped shaft portion 56 is formed at the tip end which is the free end side of the pinion 43, and a semicircular bearing portion 57 fixed to the housing 40 is used. A half of the shaft portion 56 on the opposite side of the wheel 45 is pivotally supported. The shaft portion 56 may be a tip end portion of the rotating shaft of the motor 41 that protrudes from the pinion 43. The bearing portion 57 may be integrally formed with the housing 40. By changing in this way, the tooth | gear escape in the meshing part of the said pinion 43 and the said wheel 45 can be prevented, and smooth rotation transmission can be performed.

In the embodiment, the pinion 43 (tooth portion 43a) may be formed directly on the rotation shaft of the motor 41.
In the embodiment, a belt may be employed instead of the cable 31. Alternatively, a chain may be employed instead of the cable 31. In this case, a sprocket is employed instead of the output drum 42.

  In the embodiment, the motor 41 may be a brushless motor. In general, a brush motor has a large rotor mass due to structural features, has a brush sliding resistance, and needs to have a large outer diameter in order to increase torque, and its rotating shaft is rotated from the outside. When the load increases. On the other hand, the brushless motor does not have a winding with high specific gravity on the rotor, does not slide on the brush, and can use a rare earth magnet to reduce the outer diameter required to produce the same torque as the brush motor. The load when rotating the rotary shaft from the outside can be reduced. Therefore, when the required level of manual operation force is high, the merchantability can be further improved by employing a brushless motor.

  -In the said embodiment, the detection of the opening / closing position of the slide door 1 may be a switch which turns on / off according to this opening / closing position, for example, and is a sensor which detects the rotation angle of the rotating shaft of the motor 41. Also good. Alternatively, the open / close position of the slide door 1 may be detected based on the amount of power supplied to the motor 41 by the ECU 50.

  In the embodiment, the motor 41 may be capable of regenerative control as well as energization control (power running control) by the ECU 50. In this case, the drive device 4 can be stopped while applying a braking force, for example, by regenerative control of the motor 41.

  -You may apply this invention to the other opening-and-closing part of a vehicle.

The side view which shows one Embodiment of this invention. Sectional drawing which shows the same embodiment. Sectional drawing which shows the same embodiment. Sectional drawing which shows the same embodiment. Sectional drawing which shows the same embodiment. Comparison diagram between worm gear and face gear. The block diagram which shows the electric constitution of the same embodiment. Sectional drawing which shows the deformation | transformation form of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Slide door (opening-closing part), 3 ... Power slide unit, 4 ... Drive apparatus, 31 ... Cable (power transmission band), 41 ... Motor, 42 ... Output drum (drive part), 43 ... Pinion, 45 ... Wheel, 46 ... Face gear (hypoid gear), 50... ECU, 52... Sensor, 57.

Claims (7)

In an opening / closing drive device for a vehicle opening / closing unit for driving an opening / closing unit of a vehicle,
A drive unit that drives a transmission band that opens and closes the opening and closing unit is drivingly connected to the wheel of the cross shaft gear, and a pinion of the cross shaft gear is drivingly connected to the rotation shaft of the motor, and the rotational force of the motor is transmitted via the transmission band. An opening / closing drive device for an opening / closing part for a vehicle, wherein the opening / closing part is driven to open and close by being transmitted to the opening / closing part. In an opening / closing drive device for a vehicle opening / closing unit for driving an opening / closing unit of a vehicle,
A driving unit that drives a transmission band that opens and closes the opening / closing unit is drivingly connected to a wheel of a high void gear, and a pinion of the high void gear is drivingly connected to a rotating shaft of a motor, and the rotational force of the motor is transmitted to the opening / closing unit via the transmission band. The opening / closing drive device for the vehicle opening / closing part, wherein the opening / closing part is driven to open / close. The opening / closing drive device for a vehicle opening / closing part according to claim 1 or 2, wherein the driving part and the wheel are integrally formed. The opening / closing drive apparatus for an opening / closing part for a vehicle according to claim 1 or 2, further comprising suppression means for suppressing a relative position change between the pinion and the wheel. In an opening / closing drive device for an opening / closing part for a vehicle that transmits a rotational force of a rotating shaft of a motor to the opening / closing part to drive the opening / closing part,
An opening / closing drive device for a vehicle opening / closing part, wherein the motor is controlled so that the moving speed of the opening / closing part decreases before a predetermined period of time when the opening operation of the opening / closing part ends or before the closing operation ends. The opening / closing driving device for a vehicle opening / closing part according to claim 5, wherein the rotational speed of the motor is reduced when the moving speed of the opening / closing part is reduced. The opening / closing drive device for an opening / closing part for a vehicle according to claim 5, wherein the motor is capable of power running control and regenerative control.

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