JPH028075Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field This invention relates to a power transmission device for a wind regulator for electrically raising and lowering the window glass of an automobile.

(b) Prior art Figure 1 shows a conventional power transmission device for a wind regulator. In the figure, 1 is a regulator case with a gear case 2, 3 is an electric motor that can rotate in forward and reverse directions, and 4 is a motor of this electric motor 3. A worm gear is attached to the rotating shaft 5, 6 is a hollow worm wheel gear that reduces the rotational output of the worm gear 4, 7 is an output shaft to which a pinion gear 8 is attached, and 9a and 9b are the center portions of the worm gear that are attached to the output shaft 7. The pair of cap bodies 9a and 9b jointly support the worm wheel gear 6 in a rotatable manner. And 10 is these cap bodies 9a, 9b
This spring material 10 elastically transmits the rotational driving force of the worm wheel gear 6 to the first
As shown in FIG. The wheel gear 6 is attached to the hollow part of the gear 6 and is always connected to the wheel gear 6.
The rotational driving force of the motor 3 is transmitted to the output shaft 7, and the diameter is reduced when the window glass is completely closed and opened, thereby providing a buffering effect so that an overload is not directly applied to the rotating shaft 5 of the electric motor 3. . However, such a conventional spring member 10 requires both end engaging portions 11, 11 having a complicated structure, and
Worm wheel gear 6 and pair of cap bodies 9
a, 9b, making it difficult to determine the center of rotation of the worm wheel gear 6, complicating the manufacturing process, and requiring a pair of cap bodies 9a, 9b with a more complicated shape, which reduces the number of parts used. There is a disadvantage that the number of particles increases, which increases manufacturing costs.

(c) Purpose of the invention This invention consists of an input gear that receives the rotation of an electric motor,
By simplifying the members that communicate with the output shaft by improving the conventional cap body and spring material, the overall configuration is simplified and the number of used parts is reduced. The input gear is loosely inserted into the output shaft so as to be rotatable, so that the input gear can easily obtain an accurate center of rotation, thereby making it easy to manufacture and at low manufacturing cost.

(d) Structure of the invention The power transmission device for a wind regulator of the invention transmits the rotation of the rotating shaft of the electric motor, and has an input gear having an engagement recess on the outer periphery and a loose insertion hole in the center. an output shaft that is loosely inserted into the insertion hole and rotatably supports the input gear; a bowl-shaped cap body having a notch in its cylindrical portion and pivotally attached to the output shaft; and both ends of an elastic wire. is bent outward to form both end locking portions that engage with the notch of the cap body and the recess of the input gear, and is housed within the cap body to transmit rotation of the input gear to the output shaft. Ω to do
It is characterized by having a shaped wire spring.

(E) Function Therefore, the Ω-shaped wire spring housed in the bowl-shaped cap body has its both end locking portions simultaneously protruding from the notch of the cap body and the recess of the input gear superimposed on this notch, respectively. Since the output shaft and the input gear are elastically connected by being engaged with the notch and the recess, the rotational driving force from the rotating shaft of the electric motor is transmitted to the output shaft via the Ω-type linear spring. The input gear is rotated by the electric motor even though the output shaft stops rotating when the window glass is completely closed or completely opened. This is because the overlapping relationship of the notches in the cap body is misaligned, and the force of this misalignment is absorbed by the Ω-type wire spring, which has a buffering effect until the rotation of the motor stops. Since it is accurately positioned and loosely supported on the output shaft through the insertion hole, the meshing relationship with the rotating shaft of the electric motor is ensured.

(f) Embodiment FIG. 2 is a diagram of an embodiment of the power transmission device for a wind regulator of the present invention, and in the figure, the same numbers are given to the same types as those of the conventional example.

Reference numeral 7 denotes an output shaft having a pinion gear 8 projected outside the gear case 2, and both sides of one end are cut out to form a non-circular portion 14 having an O-shaped cross section.

Reference numeral 15 denotes an input gear, which is made up of a cylindrical drum 17 having a tooth surface 16 around it that meshes with the worm gear 4, and a partition plate 19 with a loose insertion hole 18 in the center. An engagement recess 20 is formed in the side surface of the cylindrical drum 17 corresponding to the cylindrical drum 17, and a recess 21 is formed in the other side surface to reduce sliding friction with the inner wall surface of the gear case 2. be.

Reference numeral 22 designates a bowl-shaped cap body that is pivotally attached to the non-circular portion 14 of the output shaft 7 by fitting the non-circular hole 23 therein;
The cylindrical portion 24 of the cap body 22 has a size that fits into the inner peripheral surface of the cylindrical drum 17 of the input gear 15, and is provided with a notch 25 having approximately the same width as the recess 20. There is.

Reference numeral 26 denotes an Ω-shaped wire spring formed by bending an elastic wire into an Ω-shape and bending both ends outward to form both end locking portions 27, 27. Both edge portions 25a and 25b of the notch 25
and the notch 2 so as to engage with both edge portions 20a, 20a of the engagement recess 20 of the cylindrical drum 17.
5 and protrudes from the engagement recess 20 and is housed within the cap body 22.

Therefore, the rotational driving force of the rotating shaft 5 of the electric motor 3 is normally transmitted through the engagement recess 20 of the input gear 15 meshed with the worm gear 4 and the notch 25 of the bowl-shaped cap body 22.
By engaging the locking portions 27 and 27 at both ends of the wire spring 26, the force is transmitted from the cap body 22 to the output shaft 7 to rotate the pinion gear 8, and the window glass driven by the pinion gear 8 is rotated. The window glass is opened and closed by the opening/closing mechanism, and on the other hand, when the window glass is completely closed or completely opened, the output shaft 7 does not rotate, so that the notch 25 and the engagement recess 20
A positional shift occurs between the two ends, but the force of this shift is caused by the engagement of the both end locking portions 27, 27 with the edge portion 25a of the notch 25 and the edge portion 20a of the engagement recess 20.
It is absorbed by the diameter reduction of the wire spring 26, and the electric motor 3
It has a buffering effect until it stops.

(g) Effects of the invention As described above, this invention uses a simple structure consisting of a wire spring formed by bending an elastic wire and one bowl-shaped cap body as a connecting member between the input gear and the output shaft. Therefore, there is no need for a spring material with a complicated shape as in the past, and there is no need for two cap bodies as in the past, reducing the number of parts used and simplifying the overall configuration. Since the loose insertion hole is loosely inserted into the output shaft so as to be rotatable, an accurate center of rotation can be obtained by the loose insertion hole, and therefore, a product that is easy to manufacture and has a low manufacturing cost can be obtained. It is something that can be done.

[Brief explanation of the drawing]

The drawings all relate to a power transmission device for a wind regulator, and FIG. 1 is a diagram of a conventional example, A is a partially cutaway front view, B is a longitudinal sectional view, and C is a perspective view of a spring material. Furthermore, FIG. 2 shows an embodiment of the present invention, in which A shows a partially cutaway front view, B shows a vertical sectional view, and C shows an exploded perspective view of the main parts. 3... Electric motor, 15... Input gear, 20... Engagement recess, 7... Output shaft, 22... Bowl-shaped cap body, 25... Notch, 27, 27... Both end locking parts,
26...Ω type wire spring.

Claims (1)

[Scope of utility model registration request] An input gear that transmits the rotation of the rotating shaft of the electric motor, has an engagement recess on the outer periphery, and has a loose insertion hole in the center, and the input gear can be freely rotated by being loosely inserted into the loose insertion hole. an output shaft that is rotatably supported by the output shaft; a bowl-shaped cap body having a notch in its cylindrical portion and pivotally attached to the output shaft; and both ends of an elastic wire bent outward to connect the notch of the cap body and the input gear. an Ω that is housed in the cap body and transmits the rotation of the input gear to the output shaft.
A power transmission device for a wind regulator, comprising a shaped wire spring.