Electric car window regulator with using a flexible shaft.

Abstract

The basic of the technical solution is use of a flexible shaft (2) for transfer a torque from electric motor (1) to the slider (3). The slider (3) is firmly fixed to the window (8) in the car door and moves along the rail (4). An internal thread (5) is created in the rail, and the force screw (6) in the slider (3) engages with the internal thread (5). By turning the force screw (6), the entire slider (3) moves along the rail (4). The torque from the electric motor (1) to the force screw (6) is transfered by a flexible shaft (2). The direction of rotation of the electric motor (1) determines the direction of movement of the slider (3) along the rail (4).

Description

[0001] Electric car window regulator with using a flexible shaft.

[0002] Description

[0003] Technical Field

[0004] The invention relates to a car window regulator for lifting and lowering car window using a flexible shaft to transfer a torque from an electric motor to the slider.

[0005] Background Art.

[0006] Currently, mass-produced electric window regulators are based on the principle of a steel cable that is wound on a cable drum. The cable is fixed to the slider from top and bottom of the slider. When window is raised, the upper part of the cable is wound on the cable drum and pulls the slider upwards along the rail. When lowering window is applicable, the lower part of the cable is wound on the cable drum, and the cable pulls the slider down on the rail. The cable drum is driven by an electric motor with a worm gear. The slider moves along the rail, which has a roundness according to the roundness of the window. The rail can be from metal or plastic material. At the upper and lower end of the rail there are wheels-pulleys that guide the steel cable. This solution has several disadvantages: complicated assembly, many parts required for the correct function of the device, fixed installation dimensions. Other methods of electric window regulator are also known, but they are rarely used. For example, a scissor solution. The electric motor with use worm gearbox rotate one arm of the so-called scissors and the slider guided in the rail groove, rise along the rail track. A slider in a rail groove go along the path of the groove that the slider guides. This window regulator solution is basically taken from a manual window regulator. The disadvantage of solution is complicated production, complicated assembly and thus high price. Another possibility for an electric window regulator is create of gears on a steel rail along which the slider moves. In this case, the slider is equipped with a gear wheel and drived by an electric motor with a worm gear. The electric motor is firmly fixed together with the slider and moves together with the car window when it is raised and lowered. This solution has many disadvantages and is therefore not used in practice. The main disadvantage is the wear of the parts during the life of the mechanism. The disadvantage is allso, the electric motor moves together with the slider and is not protected from rainwater. Disclosure of Invention

[0007] The basic of the technical solution is the use flexible shaft to connect the electric motor to the slider. Slider moves along the rail and is firmly fixed to the car window. The electric motor for drive the slider is firmly fixed to the car door or to the plastic carrier plate of the car door. During lowering and raising of the window, the slider moves along a curved path in the door along the so-called rails. The curved shape of the rail along which the slider moves is given by the curvature of the car door window. The rail has an internal thread along its length and a force screw has an external thread. Electric motor is connected by a flexible shaft to the force screw, which is freely ratable assembled to the slider. When the electric motor is switched on, the torque is transferred from the electric motor to the force screw and the slider moves along the rail. The direction of movement of the slider along the rail is given by the direction of rotation of the electric motor. The flexible shaft ensures the torque along the entire movement of the slider along the rail. The flexible shaft has sufficient length for this.

[0008] Brief Description of Drawings.

[0009] On the Fig. No. 1. Is window regulator shown in isometric view. On the Fig. No. 2. the window regulator is shown in view perpendicular to the slider In Fig. No. 3. is an A- A section of the mechanism with the rail structure and force screw in the slider is visible. In Fig. No. 4. is an isometric view of the window regulator. There is an internal thread in the rail. In Fig. No. 5. is a bottom view of the slider with the flexible shaft attached

[0010] Mode for Carrying Out the Invention.

[0011] In Fig. No. 1 and 2 is shows the mechanism of the window regulator. The electric motor 1 is firmly fixed to the support plate 7 and a flexible shaft 2 is connected to the electric motor 1. The slider 3 is fixed to the window 8, from glass material, in the car door. A flexible shaft 2 is connected to the slider 3. In Fig. No. 3 is a section A-A of the mechanism and it can be seen that the force screw 6 is engaged with the external thread 5 of the rail 4. The internal thread 5 in the rail 4 is visible in Fig. No. 4. Wiew from the bottom of the slider 3, can be seen that a force screw 6 is mounted to the slider 3, which is connected to the flexible shaft 2. The force screw 6 is freely ratable in the slider 3. When the electric motor 1 is switched on, the torque is transferred from the electric motor 1 to the flexible shaft 2 and transfers the torque to the force screw 6 in the slider 3. By turning of the force screw 6, the slider 3 moves along the rail 4. The direction of movement of the slider 3 along the rail 4 is given by the direction of rotation of the electric motor 1.

[0012] Industrial Applicability.

[0013] An electric car window regulator with use a flexible shaft can be used in the car for electric operating the window.

Claims

AMENDED CLAIMS received by the International Bureau on 25 July 2024 (25.07.2024)Claims

1. An electric window (8) regulator consisting of an electric motor (1) and a slider (3), which moves along the rail (4), that the torque from the electric motor (1) to the force screw (6) mounted in the slider (3) is transferred by a flexible shaft (2) characterized in that force screw (6) of slider (3) is mounted inside the open groove with thread (5) of rail (4).

2. Electric window (8) regulator according to claim 1 , characterized in that force screw (6) axis is parallel to open groove with thread (5) inside rail (4).

3. Electric window (8) regulator according to claim 1 , characterized in that the open groove with thread (5) is open towards the flexible shaft (2) position and open arms of the groove with thread (5) are parallel to plane formed by the axis of flexible shaft (2).

4. Electric window regulator according to claim 3, characterized in that the groove with thread (5) can be semi-circular or partially circular, with the legs of the groove being of equal or unequal length.

5. Electric window regulator according to claims 1 - 4, characterized in that, end of flexible shaft (2), where it is connected to the force screw (6), is inside open groove with thread (5) rail (4)

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