JPS59233082A - Drive apparatus for wind regulator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a drive device for a window regulator. More specifically, the present invention relates to a manual drive device incorporating a novel anti-reverse mechanism.

The drive device for a window regulator, which has traditionally been used as a device to manually open and close the window glass of automobiles, etc., usually requires smooth operation when driven by a crank-type lever from inside the vehicle or indoors. It also has a built-in anti-reverse mechanism that resists the external force and prevents the window glass from opening or closing when a direct force is applied to the window glass.This prevents the window glass from sliding due to car vibrations. This prevents the window glass from falling or being pried open from the outside.

An example of a drive device incorporating such a reverse rotation prevention mechanism is shown in FIG. 7. This includes a brake spring (53) housed in the casing (51) so as to be in close contact with the cylindrical inner wall surface (52) of the casing (51), and both ends (54) of the brake spring (53). ), a drive shaft (55) formed with a fan-shaped cutout (56) that engages with the
57) and a driven member (5) having fan-shaped protrusions (58) that engage with the ends (54) and (55) with play.
9) (pulley in this conventional example).

In other words, this thing is a crank type lever (60
) in the direction of arrow (A), one end surface of the notch (56) moves in the direction of arrow (A) and engages with one end (55) of the brake spring (53). , the driven member (59) is rotated in the direction of arrow (A) while pulling its one end (55) in the direction of arrow (A) to reduce the outer diameter of the brake spring (53). When the lever (6o) is rotated in the direction of the arrow (E>), the brake spring (53) is also tightened in the direction of contraction, so that it does not interfere with the operation of the lever (60).

Conversely, when the driven member (57) is rotationally driven by an external force, the protrusion (58) engages the brake spring (
In order to press the ends (54) and (55) of the brake spring (53) in a direction that increases the outer diameter of the brake spring (53), the brake spring (53) and the inner wall surface (51) of the casing (51)
The frictional force of the brake spring (52) increases, and the brake spring (53)
And rotation of the driven member (59) is restrained.

There is also known a drive device in which the brake spring is brought into close contact with the outer circle of the boss inside the casing. The stopping action of the conventional anti-reverse mechanism is based on the outer peripheral surface of the brake spring (53) and the inner wall surface (51) of the casing (51).
52) or based on the frictional force generated between the outer peripheral surfaces of the boss (not shown). Therefore, the inner wall surface (52) of the casing (51) wears out due to the strong frictional force with the outer circumferential surface of the brake spring (53), resulting in a drawback that the braking effect becomes insufficient after long-term use.

Furthermore, even when operating the lever (60), the outer periphery of the brake spring (53) and the inner wall surface (52) of the casing (51) are always in sliding contact, so extra operating force is required, making the operation less efficient. It has the disadvantage of being low.

On the other hand, in the case where the window regulator is operated by the rotation of a motor, there is an advantage that the worm and worm wheel used as the deceleration means can also function to prevent reverse rotation. However, even if this device were to be used as is in a manual drive device, it would be impractical because the number of rotations of the lever required would be large.

Therefore, the inventor of the present invention conducted intensive research to eliminate the disadvantages in terms of price, and as a result, when the drive device is configured as described below, it is used as a deceleration and reversal prevention means in a motor-driven drive device. The present invention was completed based on the completely new discovery that the worm and worm wheel mechanism can be applied to a manual drive device, and the drive device can be made more compact.

That is, the present invention includes a casing, a drive shaft rotatably supported within the casing, a crank type lever fixed to one end of the drive shaft, and a crank type lever rotatably provided within the casing, the drive shaft being rotatably supported within the casing. A drive device for a window regulator, comprising a driven member connected to the shaft so that rotational torque from the drive shaft is transmitted to the shaft,
A large-diameter hypoid gear is fixed to the drive shaft, and an intermediate shaft having a small-diameter hypoid gear meshing with the large-diameter hypoid gear is rotatably provided in the casing, and a worm is formed approximately in the center of the intermediate shaft, and A window regulator characterized in that a drive member is rotatably supported on a drive shaft, and a worm wheel that meshes with the worm is protruded from the center of the side surface of the drive member so as to be concentric with the drive shaft. The gist of this paper is the drive system for

Next, the drive device of the present invention will be explained with reference to the drawings, but the present invention is not limited to such embodiments.
Modify it as appropriate depending on the purpose of use and the target window.

FIG. 1 is a partially cutaway front view showing an embodiment of the drive device of the present invention, FIG. 2 is a partially cutaway side view of the drive device shown in FIG. 1, and FIG. 6 is a partially cutaway side view of the drive device of the present invention. Partially cutaway side views showing other embodiments, FIGS. 4 to 6 are IMs of window regulators employing different embodiments of the drive device of the present invention.
It is a schematic front view.

In the embodiment shown in FIGS. 1 and 2, a boss (3
) protrudes, and the drive shaft is connected by a hole (5) in the center of the cover (4) that covers the open end side of the casing chamber 1) and a hole (6) provided in the boss (3). (
7) is rotatably supported. One end of the drive shaft (7) protrudes from the cover (4), and has serrations (9) on its outer periphery for fixing a crank-type lever (8).
is formed. A large-diameter high gear α0) is provided at a portion of the drive shaft (7) corresponding to the inside of the cover (4) so as to be concentric with the drive shaft (A). Furthermore, an intermediate shaft 01) is provided in the casing (1) so as to be rotatable in a torsional direction with respect to the axis of the drive shaft (A), that is, in a direction perpendicular to a virtual plane containing the axis of the drive shaft (7). A small-diameter hypoid gear 02) that meshes with the hypoid gear (10) is formed on the intermediate shaft (11) so as to be concentric with the intermediate shaft (11). Intermediate shaft (
A worm (13) is formed on the outer periphery of the substantially central portion of the worm (11). A pulley 04), which is a driven member, is rotatably provided on the drive shaft (A). Further, a worm wheel (16) protruding in the axial direction is provided at the center of the pulley (I4), and the worm wheel θG
) is meshed with the worm (13).

In this embodiment, as described above, the driven member is the pulley 0.
4), both ends (21) and (a) of the wire are locked around the pulley 04) and wound in opposite directions to substantially one wire.

The operation of the drive device depicted above will be explained.

First, when rotating the lever (8) in the direction of arrow (A), the intermediate shaft (11) is accelerated according to the gear ratio due to the gearing of hypoid gears 00) and (12), and rotates in the direction of arrow (0). do. Furthermore, worm θ3) and worm wheel 0
Pulley 04) is decelerated due to the meshing of 6) and arrow (A)
Rotate in the direction. Therefore, the wire is wound on the outer circumference of pulley 04) on one end side (2 wires are wound on the other end side G21)
is unraveled. For example, in the window regulator shown in FIG. 4, the loop of wire (20) is thereby circulated and the window glass (goods) which is latched to a portion of the loop is closed.

When the lever (8) is rotated in the direction of the arrow (B), the lever (8) is operated in the same manner as described above, but in the opposite direction, and the window glass (c) is opened.

As expected, the windows can be opened and closed smoothly from inside the car or inside.

On the other hand, window glass I? When an external force is directly applied to 41, the external force applies torque to the driven member, the pulley 0, via the wire (A). However, the worm wheel (16) formed on pulley 0→
13) cannot rotate due to teeth. In other words, the tooth surfaces of the worm wheel (16) cannot slide against each other in order to press the worm α3) at an angle less than the friction angle. In this way, the anti-reversal effect is achieved, so the window glass cannot be pried open from the outside.
Window glass will not slide down due to car vibrations.

As mentioned above, the drive device ↑■ of the present invention has a reversal prevention effect using a worm mechanism consisting of a worm (13) and a worm wheel (16), and there is no need to use a brake swing. Therefore, there is no wear on the inner wall surface of the casing or the outer surface of the boss of the casing, which occurs due to the use of a brake spring, and a stable reversal prevention effect can be maintained over a long period of time. Moreover, since there is no friction caused by brake springs, operating efficiency is extremely high.

Further, in the drive device of the present invention, the deceleration effect inevitably produced by the worm mechanism is offset by increasing the rotation of the lever using a hypoid gear in advance. Moreover, in a normal speed increasing mechanism using bevel gears, the axes of the drive shaft and the driven member cannot be made concentric, resulting in a complicated structure, but since the drive device of the present invention uses hypoid gears, Axial center of small diameter hypoid gear (12), Wachiworm θ3)
The axial center of the large-diameter hypoid gear αO) is arranged in a twisted position with respect to the axial center of the large-diameter hypoid gear αO), and the drive shaft (7) and the driven member are arranged concentrically.

Therefore, the entire drive device can be configured extremely compactly.

Further, in the drive device of the present invention, since the speed increasing ratio or the speed reducing ratio in the hypoid gear or the worm mechanism can be arbitrarily selected, the effective diameter of the driven member such as the pulley can be selected relatively freely. Therefore, the outer diameter of the pulley can be set large, thereby making it possible to reduce the thickness of the pulley and reducing the operating force.

Note that a wire elongation absorbing mechanism, a balance spring, and the like can be compactly incorporated into the drive device of the present invention as in the embodiments described below.

For example, in the embodiment shown in FIG. 6, the pulley is divided into two parts, a first pulley (14a) and a second pulley (1, 41), each having an annular ratchet that meshes with the adjacent side surfaces. Teeth (15a) and (]5b) are formed, and the second boo! J (14b) is provided slidably in the axial direction with respect to the drive shaft (γ), and a wave washer (]'
7) is inserted, and the second pulley (1
4b) is the first boo! It is biased toward the J (14a) side. With such a configuration, the embodiment of FIG. 3 has two blocks! J
Permanent elongation occurring in the wire (go) due to the relative rotation occurring between (14a) and (14b) can be automatically absorbed.

Furthermore, a fourth part 08) is formed on the side facing the bottom surface (2) of the second pulley (14b), and both ends of the fourth part 08) are connected to the outer peripheral surface of the boss (3) and the inner peripheral surface of the fourth part (18), respectively. When the locked balance spring (19) is housed, the weight of the nitrous glass can be balanced, making manual operation easier.

In the above embodiments (Figs. 1 to 3), the pulley 0→ is used as the driven member, but for example, when a gear (G) as shown in Fig. 5 is used as the driven member, The drive device of the present invention can be employed for a window regulator (32) that opens and closes the window glass e4 via a toothed push/pull cable (31).

Further, when a pinion (35) is used as a driven member, the drive device of the present invention can be employed for a window regulator (36) with a set of arm levers as shown in FIG.

As mentioned above, the drive device of the present invention achieves a reverse rotation prevention effect without using a brake spring, and has significant effects such as high operating efficiency and less damage due to wear, so its practical value is high. is extremely large.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway front view showing an embodiment of the drive device of the present invention, FIG. 2 is a partially cutaway side view of the drive device shown in FIG. 1, and FIG. 3 is a partially cutaway side view of the drive device of the present invention. A partially cutaway side view showing another embodiment, FIGS. 4 to 6 are schematic front views showing different embodiments of a window regulator employing the drive device of the present invention, and FIG. 7 is a conventional reverse rotation prevention mechanism. FIG. (Main symbols in the drawing) (1): Casing (7): Drive shaft (8) Nillever (10): Large diameter hypoid gear (11): Intermediate shaft (B): Small diameter hypoid gear 03): Worm 04): Pulley 06): Worm wheel boat Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7

Claims (1)

[Claims] 1 a casing, a drive shaft rotatably supported within the casing, a crank-type lever fixed to one end of the drive shaft, rotatably provided within the casing and configured to drive the drive shaft; A drive device for a window regulator having a driven member connected to transmit rotational torque from a shaft, wherein a large diameter high void gear is fixed to the drive shaft, and a small diameter gear meshing with the large diameter high void gear. An intermediate shaft having a high void gear is rotatably provided in the casing, a worm is formed approximately at the center of the intermediate shaft, the driven member is rotatably supported on the drive shaft, and a worm is provided at the center of one side of the worm. A drive device for a window regulator, characterized in that a worm wheel that meshes with the worm is protruded so as to be concentric with a drive shaft.