JP3444613B2 - Drive device for power window regulator - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive device for a power window regulator. More specifically, the present invention relates to a cable drive device in a power window regulator that raises and lowers a window glass of an automobile door or the like by a motor drive via a control cable.

[0002]

2. Description of the Related Art As shown in FIG. 7, a conventional cable type power window regulator driving device includes a motor bracket 102 made of a metal plate having three mounting legs 101, and a motor bracket 102 on the lower surface side. It is composed of a power unit 103 to be attached and a drum portion 104 to be attached to the upper surface side. The power unit 103 includes a motor M and a speed reducer 107 including a worm 105 and a worm gear 106 connected to an output shaft of the motor M. The speed reducer 107 outputs an output of the speed reducer 107 to a reducer housing 109 made of synthetic resin. It is assembled by attaching the shaft 108 so as to protrude.

The drum portion 104 is a drum housing 1 having a bottomed cylindrical drum housing portion 110 made of synthetic resin.
11 and a drum 112 for driving a cable, which is rotatably accommodated in the drum accommodating portion 110. The drum housing 111 has a pair of cables (inner cables) 114, 11 wound around the drum 112.
Cable introducing portions 116 and 117 for guiding the cable 5 to the outside are provided so as to project tangentially from the cylindrical side wall portion 113 of the drum housing portion 110. The cables 114, 115 are attached to the ends of the cable introducing portions 116, 117.
The ends of the conduits 118, 119 guiding the are connected. The cable introduction portions 116 and 117 include the drum 1
The lower side, which communicates with the internal space of the drum accommodating section 110 and is open so that the cables 114 and 115 can be inserted into the drum housing 111 together with the drum 112 in a state in which the ends are locked to 12 Slits 120 and 121 communicating with the outside are formed.

Such a power window regulator has a mechanical portion having substantially the same structure as that of a manual window regulator which is moved up and down by operating a handle, that is, a guide rail, a carrier plate, a control cable, and a cable winding unit integrated with them. Drum 112
And a drum housing 111. Those mechanical parts are manufactured as one unit in advance. Then, the motor M, which is an electric element, and the speed reducer 107 closely related thereto are manufactured as a power unit 103 separately from the unit of the mechanical portion, and both units are coupled via a motor bracket 102.

[0005]

Generally, a vehicle door is mounted on a vehicle body frame and then an internal mechanism such as a window regulator is mounted on the entire assembly line. However, recently, a door incorporating an internal mechanism has been assembled as a sub-assembly unit, and this has been assembled to a vehicle body frame on a vehicle body assembly line. Therefore, integrated design of the door and the window regulator has been promoted, and along with this, it is further desired to reduce the weight of the drive part of the window regulator and to cope with complicated shapes.

However, in the conventional driving device, the drum portion 1 is provided on the upper and lower surfaces of the motor bracket 102 made of a metal plate.
04 and the power unit 103 are attached to each other, there is a limit to weight reduction, and there is a problem that a complicated shape cannot be accommodated because the shape is restricted. The present invention reconsiders the boundary area or the separation position between the mechanical unit and the power unit of the power window regulator to further reduce the weight of the entire device, facilitate the handling of complicated shapes, and further reduce the number of assembling steps. This is a technical issue.

[0007]

A drive device for a power window regulator according to the present invention comprises: (a) a power unit having a motor and a speed reducer built-in, and an output shaft of the speed reducer protruding from one surface; and the output shaft. Of the power unit and the drum housing, and a drum housing having a drum that is connected to rotate with the drum, a drum housing portion that houses the drum, and a cable introduction portion that guides a cable wound around the drum to the outside. a power window regulator drive system that includes a leg mounting supports the entire, (b) the drum and leg mounting a yield capacity portion is integrally molded with synthetic resin, wherein the cable entry section (c) with open toward the bottom, communicates with the drum yield capacity <br/> section, is; (d) mounting leg, drum yield
A portion extending outward from the container portion and a portion extending axially downward from the tip thereof are provided, and a continuous reinforcing rib is provided from the portion extending outward of the mounting leg to the portion extending downward, (e) The power unit is attached to the lower surface of the drum housing.

[0008] In such an apparatus, which the Pawayu <br/> knit is attached to the lower surface portion extending outwardly of the leg mounting is preferred.

[0009]

In the apparatus of the present invention, the drum housing itself has mounting legs, and the whole of them is integrally molded with synthetic resin so that the drum housing with the legs is directly fixed to the door inner panel or the like. There is. Further, there are advantages that the number of parts is reduced, the number of assembling steps is reduced, and the degree of freedom in designing the shape of the mounting leg is increased.

[0010] and further portion where the mounting legs extending outwardly of said drum yield capacity portion has a portion extending axially from the tip, the reinforcing rib which is continuous over the portion extending from the portion extending outwardly in the axial direction Since it is provided, it has sufficient strength even though it is made of synthetic resin. In the apparatus according to the second aspect, the power unit is mounted by utilizing the portion extending to the outside based on the increased strength of the mounting leg, so that the mounting can be performed firmly.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A drive device of the present invention will be described below with reference to the drawings. 1 is a perspective view before assembly showing an embodiment of a drive device of the present invention, FIG. 2 is a sectional view showing an example of a power unit according to the present invention, FIG. 3 is a plan view of the drive device of FIG. 1, and FIG. FIG. 5 is a cross-sectional view taken along the line AOA of FIG. 3, and FIG. 5 is a line BO of the drum housing with legs in the drive device of FIG.
6 is a cross-sectional view taken along the line B, and FIG. 6 is a front view showing the entire window regulator including the drive device shown in FIG.

The drive device A for a window regulator shown in FIG. 1 is for a power unit P having a motor M and a speed reducer G, a drum 1 attached to the power unit P, and a drum with legs for accommodating the drum 1. Housing ( hereinafter simply referred to as drum housing) 2
And a mounting screw 3 for mounting the power unit P on the drum housing 2.

As shown in FIG. 2, the power unit P has a speed reducer housing 4 made of synthetic resin, and a worm gear 6 is rotatably housed in a cylindrical worm gear housing 5 under the housing 4. The worm 8 is rotatably accommodated in a cylindrical worm accommodating portion 7 provided in the tangential direction of the worm gear 6. The worm gear and the worm 8 form a speed reducer G. Further, the output shaft of the motor M is connected to one end of the worm 8, and the motor M is attached to the housing 4. Reference numeral 9 is an output shaft coupled to the central portion of the worm gear 6 so as to rotate together,
Reference numeral 10 is a shock absorber, 11 is a torque transmission plate,
12 is a C ring and 13 is a bottom cover. Such a power unit P is almost the same as the conventional one, and can be purchased as a completed unit.

As shown in FIGS. 3 to 5 , the drum housing 2 has a bottomed cylindrical drum accommodating portion 14 for accommodating the drum 1, a flange portion 15 extending around the lower end opening, and a drum. It is provided with cable introduction portions 17 and 18 extending tangentially from the side wall portion 16 of the housing portion 14.
The cable introducing portions 17 and 18 are composed of two cylindrical members that open at an angle of 60 to 120 °. Each cylindrical member communicates with the inside of the drum accommodating portion 14 at the base end side.
On the other hand, the free end side is released, and the conduits 19 and 20 of the control cable are inserted and connected. Further, slits 23 and 24 for passing the inner cords 21 and 22 are provided on the lower surfaces of the cable introducing portions 17 and 18. The one slit 23 has tongue pieces 25 and 26 in order to provide a narrow portion that allows only the inner cable 21 to pass therethrough. The other slit 24 has a width that allows the conduit 20 to be inserted laterally (from the lower side in the drawing) so that the inner cord 22 is wound around the drum 1 and then inserted into the drum housing 2.

These parts are almost the same as the conventional drum housing, but in the drum housing 2 of FIG. 1, three mounting legs 27 for mounting the drive unit A on the door inner panel of the automobile are further provided. And the drum housing portion 14 and the flange portion 15,
It is integrally molded with a synthetic resin together with the cable introducing portions 17 and 18. Each of the mounting legs 27 has a portion 28 that extends radially outward from the drum accommodating portion 14 and a portion 2 thereof.
8. A portion 29 that extends downward from the tip of 8 in the axial direction, and a base portion 30 that extends outward from the lower end of the portion 29.
Consists of. The portion 28 extending outward is the flange portion 1
5, and ribs 31 for reinforcement are provided on both side edges of the mounting leg 27 from the portion 28 to the portion 29 extending downward. The portion 29 extending downward is provided with another reinforcing rib portion 32 along the center line. Further, a hole 33 through which the mounting screw 3 for mounting the power unit P is formed is formed in the portion 28 extending outward, and a female screw 34 for mounting to the door inner panel is formed in the base portion 30.

The housing 2 for the drum is usually integrally molded by injection molding with a glass fiber reinforced resin such as polyethylene terephthalate, holybutylene terephthalate, polyacetal or polyamide. In that case, it is preferable that the female screw 34 of the base portion 30 is formed by insert-molding a metal nut. Further, a metal plate may be insert-molded on the mounting leg 27. Around the periphery of the speed reducer housing 4 of the power unit P, the mounting legs 2 of the drum housing 2 are attached.
Three arm portions 35 for attaching to 7 are projected. Further, the output shaft 9 of the speed reducer G projects from the upper surface side of the housing 4 in a rectangular cross section. The drum 1 is substantially the same as that of the conventional drive device, and as shown in FIG. 4, a spiral groove 36 for winding the inner ropes 21 and 22 is formed on the outer periphery, and the inner ropes 2 are respectively formed at the upper end and the lower end.
Locking holes 37 and 38 for locking the cord end fittings 21a and 22a of Nos. 1 and 22 are formed.

The drive unit A constructed as described above is assembled as follows. First, as in the conventional power unit P, the worm 8 and the motor M are attached to the speed reducer housing 4, the worm gear 6 and the like are further incorporated into the housing 4, and then the output shaft 9 is inserted from above and the lower end thereof is inserted. Fit the C ring 12 and then the bottom cover 1
It is assembled by attaching 1 (see FIG. 2). The power unit P may be assembled in advance and used as a purchased product.

Next, as shown in FIG. 4, the drum 1 is assembled to the drum housing 2. In that case, one inner cable 21 is first inserted into the slit 23 having the smaller width, and the conduit 19 thereof is inserted from the end of the cable introducing portion 17.
Further, the inner cord 21 is wound around the drum 1, and then the cord end fitting 21a is locked in the locking hole 37. Further, the other inner cord 22 is similarly locked to the drum 1, and then the other inner cord 22 and the conduit 20 are laterally inserted into the cable introducing portion 18 through the wide slits 24.

After the assembly of the drum 1 and the drum housing 2 is completed, the power unit P is inserted into the output shaft 9 of the power unit P while the central hole 39 having a square cross section of the drum 1 is fitted.
Is attached to the drum housing 2 with the screw 3. After the assembly is completed, the base portions 30 of the three mounting legs 27 of the drum housing 2 shown in FIGS. 4 to 5 may be attached to the door inner panel or the like with screws as shown in FIG. In the window regulator of FIG. 6, reference numeral 4
0 is a guide rail, 41 is a carrier plate, 42, 4
Reference numerals 3 are cable guides, respectively, and conventional parts can be used for these parts as they are.

In the above embodiment, the cable introducing section 1
Although 7 and 18 are integrally molded with the drum housing 2, they are manufactured as a separate component (joint member) together with a part of the side wall portion 16 of the drum housing portion 14, and the joint member is attached to and detached from the drum housing. It may be configured freely. In that case, if the cable introducing portion is configured to be attachable to the reducer housing of the power unit P, the drum and the cable are attached to the power unit P together with the joint member in advance,
After that, the drum housing and the power unit P can be connected to each other, so that the assembling work becomes easier.

In the above embodiment, it is preferable that the joint member is axially fitted into the notch formed in the side wall portion in order to facilitate the assembly. The joint member may be made of the same synthetic resin as the drum housing.

[0022]

The drive device for a power window regulator according to the present invention is lightweight because it does not use a motor bracket made of a metal plate. Further, since the drum housing is directly attached to the mating member such as the door inner panel, there are few restrictions on the shape, and it can be designed in any shape according to the mating member. Further, it is not necessary to screw the drum housing and the speed reducer housing so as to sandwich the motor bracket from above and below, and the number of assembling steps is reduced. Further, since the reducer housing has a simple shape, a relatively low-cost motor can be used.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a drive device of the present invention before assembly.

FIG. 2 is a sectional view showing an example of a power unit according to the present invention.

3 is a plan view of the driving device shown in FIG. 1. FIG.

4 is a cross-sectional view taken along the line AOA of FIG.

5 is a cross-sectional view of the drum housing in the drive device of FIG. 3, taken along the line B-O-B.

6 is a front view showing the entire window regulator including the drive device of FIG. 1. FIG.

FIG. 7 is a perspective view of an example of a conventional drive device before assembly.

[Explanation of symbols]

1 drum 2 Drum housing 9 Output shaft 14 Drum storage 17 Cable introduction section 18 cable entry 27 Mounting legs 28 Part extending outward 29 Part extending downward 31 Reinforcing rib 32 Reinforcing rib M motor A drive G reducer P power unit

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Claims (2)

(57) [Claims] 1. A power unit having a motor and a speed reducer built-in and having an output shaft of the speed reducer projecting from one surface, a drum coupled so as to rotate together with the output shaft, and the drum. and housings drum having a cable entry portion for guiding the cable to an external wound on the drum housing portion and the drum for accommodating the driving power window regulator and a mounting leg for supporting the whole of the power unit and the drum housing an apparatus, (b) and leg mounting said drum yield capacity portion is integrally molded with synthetic resin, with an opening towards the bottom the cable entry section (c), communicates with the drum yield capacity unit and, (d) the mounting leg and the portion extending outwardly of the drum yield capacity portion, and having a portion extending from the tip axially downwardly, the A continuous reinforcing rib is provided from a portion extending outward of the mounting leg to a portion extending downward, and (e) the power window regulator drive device in which the power unit is mounted on the lower surface of the drum housing. 2. The drive unit according to claim 1, wherein the power unit is mounted on a lower surface of a portion of the mounting leg that extends to the outside.