JPH0635013U - Drive unit for moving parts of automobile - Google Patents

Abstract

(57) [Abstract] [Purpose] The drive device is remarkably downsized, the cost is reduced, the weight is reduced, and the assembling property and workability are improved. [Structure] When constructing a drive unit 1 for displacing a movable part M in an automobile, for example, an X arm mechanism part Mw of an electric window regulator W, in particular, a drive gear 3 and a movable part M included in a motor shaft 2s of a drive motor 2 In between, a planetary gear mechanism 4 that decelerates the rotation of the drive gear 3 and transmits it to the movable portion M is provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a drive unit for a movable part of an automobile, which is suitable for use in an electric window regulator or the like of the automobile.

[0002]

[Prior art]

 Generally, an automobile is provided with various movable parts such as an X arm mechanism part in an electric window regulator, and these movable parts are driven by a drive device having a drive motor.

As an example, a conventional electric window regulator is shown in FIG. The electric window regulator 50 shown in the figure includes an X-arm mechanism section 53 composed of a main arm 53m and a sub-arm 53s that are rotatably connected via a shaft 52. One end of the sub arm 53s is rotatably attached to the window glass 54 side, and the other end is slidably mounted on a horizontal rail 55 fixed to the door D. Further, one end of the main arm 53m is slidably mounted on the horizontal rail 56 on the window glass 54 side, while the other end side of the main arm 53m is supported by the drive unit 60. The drive unit 60 is constructed as follows. First, a sector gear 61 is attached to the other end of the main arm 53m, and an intermediate portion of the main arm 53m located between the sector gear 61 and the shaft 52 is rotated via a support shaft 63 to a base plate 62 attached to a vehicle door D. Mount freely. A drive motor 64 is attached to the base plate 62, and a reduction transmission mechanism 68 including a worm wheel 66 and a pinion 67 is arranged between the drive gear (worm gear) 65 and the sector gear 61 provided on the shaft of the motor 64.

[0004]

[Problems to be solved by the device]

 However, since the above-described conventional drive device 60 includes the gear mechanism including the drive gear 65, the worm wheel 66, the pinion 67, and the sector gear 61, the drive device as a whole is increased in size, cost, and weight, and at the same time, the assembly is increased. There was a problem that assembly accuracy and workability deteriorated in addition to the requirement for accuracy in attachment. In particular, not only is the sector gear 61 large in shape, but it is also necessary to secure a space for its movement, so it is not easy to install it inside the door of an automobile where the space is extremely limited, and at the same time, it is difficult to install other parts. Since the installation space is limited, the above problem has been a very important problem to be solved for automobiles.

The present invention solves the problems existing in such conventional techniques, and can significantly reduce the size, cost, and weight of the entire drive device, and improve the assemblability and workability. It is an object of the present invention to provide a drive unit for a movable part of an automobile capable of achieving the following.

[0006]

[Means for Solving the Problems]

 The present invention is particularly applicable to the motor shaft 2s of the drive motor 2 when constructing the drive unit 1 for a movable part of an automobile that displaces the movable part M in the automobile, for example, the X arm mechanism part Mw of the electric window regulator W. It is characterized in that a planetary gear mechanism 4 for decelerating the rotation of the drive gear 3 and transmitting the decelerated rotation to the movable portion M is provided between the drive gear 3 and the movable portion M.

[0007]

[Action]

 According to the drive device 1 for a movable part of an automobile according to the present invention, the drive gear 3 included in the motor shaft 2s of the motor 2 is rotated by the operation of the drive motor 2. The rotation of the drive gear 3 is transmitted to the planetary gear mechanism 4 and also decelerated and then transmitted to the X arm mechanism Mw that constitutes the movable portion M 1, whereby the X arm mechanism Mw is displaced up and down.

[0008] The planetary gear mechanism 4 has a rotation shaft center for inputting rotation and a rotation shaft center for outputting rotation, which are arranged coaxially, and can be configured as a unit as a whole. It is possible to reduce the weight and weight, and to improve the assemblability and workability.

[0009]

【Example】

 Next, preferred embodiments according to the present invention will be described in detail with reference to the drawings.

First, the configuration of the movable part driving device 1 according to the present embodiment will be described with reference to FIGS. 1 to 6. In the embodiment, the movable part M is applied to the X arm mechanism part Mw of the electric window regulator W.

As shown in FIGS. 1 and 2, the electric window regulator W includes an X arm mechanism section Mw including a main arm 12m and a sub arm 12s that are rotatably connected via a shaft 11. One end of the sub-arm 12s is rotatably attached to the window glass 13 side as shown in FIG. 6, and the other end is slidably mounted on a horizontal rail 14 fixed to a door D of an automobile. Further, one end of the main arm 12m is slidably mounted on the horizontal rail 15 on the side of the window glass 13, and the other end is attached to the drive unit 1.

The drive unit 1 is configured as a unit and is attached to the inner plate surface 16 of the door D of the automobile. Further, as shown in FIGS. 3 and 4, the drive device 1 is provided with a housing 21 in the shape of a circular case whose one end face is open. The planetary gear mechanism 4 is incorporated inside and the drive motor is provided on the outside. Install 2. The motor shaft 2s of the drive motor 2 is penetrated through the housing 21 so as to face the outside of the housing 21, and the worm gear 3w constituting the drive gear 3 is attached to the tip thereof. The housing 21 is integrally formed of plastic or the like.

On the other hand, a cylindrical bearing portion 22 is integrally formed at the center of the inside of the housing 21, and the bearing portion 22 rotatably supports the shaft portion 23 by the inner peripheral surface portion thereof, and the outer periphery of the bearing portion 22. The surface portion rotatably supports the center of the worm wheel 24 that meshes with the worm gear 3w. Further, a locking portion 25 is integrally formed to extend outward from the shaft portion 23, and the locking portion 25 is locked to the end surface of the worm wheel 24. As a result, the shaft portion 23 and the worm wheel 24 rotate integrally.

On the other hand, the balancer 26, that is, the shaft portion 23 is urged in the rotational direction when the window glass 13 is raised and the window glass 13 is lowered, at the one end portion 23 x of the shaft portion 23 protruding to the outside of the housing 21. Occasionally, a spiral spring 26s for urging the shaft portion 23 in the opposite direction to the rotation direction is provided.

A center gear 27 is integrally formed in an intermediate portion of the shaft portion 23, and an inner gear 28 is integrally formed on a portion of the inner peripheral surface of the housing 21 facing the center gear 27. In the space between the center gear 27 and the inner gear 28, three planetary gears 29a, 29b, 29c are arranged at 120 ° intervals. As a result, the planetary gears 29a, 29b, 29c mesh with both the center gear 27 and the inner gear 28. In addition, shaft portions 30a, 30b, 30c are integrally provided at the centers of the planetary gears 29a, 29b, 29c.

On the other hand, the other end of the main arm 12m is integrally formed as a circular coupling plate portion 12j, and the coupling plate portion 12j supports the shaft portions 30a, 30b, 30c of the planetary gears 29a. The support hole portions 31a are provided, and the support hole portion 32 that rotatably supports the other end portion 23y of the shaft portion 23 is provided. Then, after inserting the shaft portions 30a, 30b, 30c and the other end portion 23y of the shaft portion 23 into the support hole portions 31a, ..., 32, washers 33a, 33b, 33c are attached to the tips of the shaft portions 30a, 30b, 30c. Fit and fit the ends of the shafts 30a, 30b, 30c by crimping. Further, the other end of the shaft portion 23 is crimped to form a stopper portion 34 for preventing removal. As a result, the coupling plate portion 12j can be coupled to the driving device 1, and additionally has a lid function of covering the opening of the housing 21 and a supporting function of the planetary gears 29a, 29b, 29c.

The shaft portion 23, the worm wheel 24, and the planetary gears 29a, 29b, 29c can all be integrally molded of plastic or the like, and the overall weight can be reduced. Further, with such a configuration, since the gears are all housed inside the housing 21, it is possible to reduce the overall size and size. Furthermore, since the unit is configured, it is possible to improve accuracy, assemblability and workability during assembly.

Further, the driving device 1 can also be configured as shown in FIG. 5 (modified embodiment). In FIG. 5, the same parts as those in FIG. 4 are designated by the same reference numerals to clarify the configuration. 4 in the modified embodiment is that each shaft portion 30a is rotatably inserted into each shaft receiving hole 71a formed at the center of each planetary gear 29a, and each shaft portion 30a is connected. In addition to being fixed to the plate portion 12j, a center gear 27s formed separately from the shaft portion 23 is rotatably provided, and the other end portion 23y of the shaft portion 23 is fixed to the coupling plate portion 12j by a crimp portion 34s. did. The locking portion 25s is fixed to the center gear 27s. As a result, in the case of the modified embodiment, the shaft portion 23 rotates integrally with the coupling plate portion 12j, so that the rotation speed of the shaft portion 23 becomes slower than that in the embodiment of FIG. Therefore, the winding angle of the spiral spring 26s coupled to the one end 23x of the shaft portion 23 becomes small, and spring materials having different spring constants can be used.

Next, the operation of the electric window regulator W including the operation of the drive device 1 according to the present embodiment will be described.

First, the worm gear 3w is rotated by the operation of the drive motor 2, which causes the worm wheel 24 to rotate. The rotation of the worm wheel 24 rotates the shaft portion 23, and also rotates the center gear 27 integrated with the shaft portion 23, causing the planetary gears 29a, 29b, 29c to rotate. As a result, the planetary gears 29a, 29b, and 29c revolve along the inner gear 28, and the coupling plate portion 12j rotates in a decelerated state. Therefore, the other end of the main arm 12m in the X arm mechanism portion Mw is rotationally displaced, and the X arm mechanism portion Mw is vertically expanded and contracted as shown by a solid line or an imaginary line in FIG. To be

Although the embodiments have been described in detail above, the present invention is not limited to such embodiments. For example, although the embodiment has been described with respect to the X-arm type electric window regulator, it can be similarly applied to the wire type electric window regulator. Further, the present invention can be similarly applied to other movable parts of an automobile, for example, an electric seat adjuster for adjusting a seat back angle in a reclining seat forward and backward, a moving mechanism for moving a lid in a sunroof, and the like. In addition, the configuration, shape, material, etc. of the thin portion can be arbitrarily changed without departing from the gist of the present invention.

[0022]

[Effect of device]

 As described above, the drive device for a movable part of an automobile according to the present invention is provided with a planetary gear mechanism between the drive gear and the movable part of the motor shaft of the drive motor, the planetary gear mechanism decelerating the rotation of the drive gear and transmitting it to the movable part. Therefore, the following remarkable effects are produced.

The planetary gear mechanism can significantly reduce the size and size of the entire device, and the components such as the housing and the gear can be integrally molded with plastic, so that the weight and cost of the entire device can be reduced.

Since the unit is configured, it is possible to improve the accuracy at the time of assembling, and improve the assemblability and workability.

[Brief description of drawings]

FIG. 1 is a side view of an electric window regulator including a driving device according to the present invention,

FIG. 2 is a cross-sectional plan view of an electric window regulator including the drive device,

FIG. 3 is a configuration diagram of a main part of the drive device,

FIG. 4 is a partial cross-sectional view taken along the line AA in FIG.

FIG. 5 is a longitudinal sectional view of a driving device according to a modified embodiment of the present invention,

FIG. 6 is a side view of an automobile door to which an electric window regulator having the same drive device is attached,

FIG. 7 is a side view of an automobile door to which an electric window regulator having a drive device according to the related art is attached,

[Explanation of symbols]

 1 Moving part drive device 2 Driving motor 2s Motor shaft 3 Driving gear 4 Planetary gear mechanism M Moving part Mw X Arm mechanism part W Electric window regulator

Claims (2)

[Scope of utility model registration request] 1. A drive unit for a movable part of an automobile for displacing the movable part of the automobile, wherein a planet which decelerates the rotation of the drive gear and transmits it to the movable part between the drive gear and the movable part of the motor shaft of the drive motor. A drive unit for a movable part of an automobile, which is provided with a gear mechanism. 2. The movable part is an electric window regulator X.
The drive device for a movable part of an automobile according to claim 1, which is an arm mechanism part.