Electric vehicle window glass lifter with flexible shaft
By connecting the motor and the slider with a flexible shaft, the problems of complex assembly, numerous parts, high cost, and wear of electric window regulators are solved, thus simplifying assembly, reducing costs, and improving durability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-11-17
- Publication Date
- 2026-03-27
AI Technical Summary
Existing electric window regulators suffer from problems such as complex assembly, numerous parts, fixed installation dimensions, high production costs, wear and tear during the lifespan of the mechanism, and poor motor waterproofing.
A flexible shaft is used to connect the motor and the slider. The slider moves along the guide rail, and the motor is fixed to the door or plastic support plate. The torque is transmitted to the force transmission screw through the flexible shaft. The slider moves along the curved guide rail, and the internal thread of the guide rail is engaged with the external thread of the force transmission screw.
It simplifies the assembly process, reduces the number of parts, lowers production costs, improves the durability and water resistance of the mechanism, and adapts to the curvature of different car window glass.
Smart Images
Figure CN224048963U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present invention relates to a car window glass lifter that uses a flexible shaft to transmit torque from the motor to the slider to lift the car window glass. BACKGROUND
[0002] Currently, mass-produced electric car window glass lifters work by means of a steel cable wound on a cable drum. The cable is fixed to the slider by its top and bottom. When the car window glass is lifted, the upper part of the cable is wound on the cable drum, and the cable pulls the slider upwards along the guide rail. When the car window glass is lowered, the lower part of the cable is wound on the cable drum, and the cable pulls the slider downwards along the guide rail. The cable drum is driven by a motor with a worm gear. The pulley moves along the guide rail, the roundness of which depends on the roundness of the car window glass. The guide rail can be made of metal or plastic. The upper and lower ends of the guide rail are provided with pulleys that guide the steel cable. This solution has several disadvantages: it is complex to assemble; it requires the use of many parts to ensure proper operation of the device; the installation size is fixed. There are other known, but not commonly used, methods of operation of electric car window glass lifters, such as the scissors solution. The motor turns one arm of the scissors through a worm gear box, which guides the slider in the guide rail groove to move along the guide rail track. The slider in the guide rail groove travels along the path of the slider guide groove. This car window glass lifter solution is mainly used for manual car window glass lifters. Its disadvantage is the complexity of production and assembly, which results in high prices. Another solution that can be used in electric car window glass lifters is to provide a transmission on the steel rail that guides the movement of the slider. In this case, the slider is provided with a gear that is driven by a motor with a worm gear. The motor is firmly fixed to the slider and moves with the car window glass during its lifting. This solution has not been practically applied due to its many disadvantages. Its main disadvantage is the wear of the parts during the lifetime of the mechanism, and another disadvantage is that the motor moves with the slider and is not protected from rain. SUMMARY
[0003] The present technical solution mainly uses a flexible shaft to connect the motor to the slider. The slider moves along the guide rail and is firmly fixed to the car window glass. The motor that drives the slider is firmly fixed to the car door or to the plastic support plate of the car door. During the lifting of the car window glass, the slider moves in a curved path along the guide rail in the door. The curved shape of the guide rail that guides the movement of the slider depends on the curvature of the car door car window glass. The guide rail is provided with an internal thread along its length, and the power screw is provided with an external thread. The motor is connected to the power screw through the flexible shaft, and the power screw is freely rotatably assembled on the slider. When the motor is started, the torque is transmitted from the motor to the power screw, and the slider moves along the guide rail. The direction in which the slider moves along the guide rail depends on the direction in which the motor rotates. The flexible shaft ensures that the torque changes with the overall movement of the slider along the guide rail. For this purpose, the flexible shaft has sufficient length. BRIEF DESCRIPTION OF DRAWINGS
[0004] Figure 1 is an isometric view of the car window glass lifter.Figure 2 is a vertical view of the window regulator and the slider. Figure 3 is an A-A sectional view of the mechanism, showing the guide rail structure and the force transfer screw in the slider. Figure 4 is an isometric view of the window regulator, where the guide rail is provided with an internal thread. Figure 5 is a bottom view of the slider with a flexible shaft. DETAILED DESCRIPTION
[0005] Figure 1 and Figure 2 shows the mechanism of the window regulator. The electric window regulator comprises a motor 1 and a slider 3, where the slider moves along a guide rail 4, such that torque is transmitted from the motor 1 to a force transfer screw 6 mounted in the slider 3 via a flexible shaft 2, the force transfer screw 6 of the slider 3 is mounted in an open groove with an internal thread 5 in the guide rail 4, the force transfer screw 6 axis is parallel to the open groove with an internal thread 5 in the guide rail 4.
[0006] The open groove with an internal thread 5 is open to the position of the flexible shaft 2, the open arm of the open groove with an internal thread 5 is parallel to the plane formed by the axis of the flexible shaft 2, the open groove with an internal thread 5 can be semicircular or partially circular, the legs of the open groove have equal or unequal lengths, the end of the flexible shaft 2 connected to the force transfer screw 6 is located in the open groove with an internal thread 5 of the guide rail 4.
[0007] The motor 1 is firmly fixed on a support plate 7, the flexible shaft 2 is connected to the motor 1. The slider 3 is fixed on the glass material of the window glass 8 in the door. The flexible shaft 2 is connected to the slider 3. Figure 3 is an A-A sectional view of the mechanism, where the force transfer screw 6 engages with the internal thread 5 of the guide rail 4. The internal thread 5 of the guide rail 4 is shown as Figure 4 . As can be seen from the bottom of the slider 3, the force transfer screw 6 is mounted on the slider 3 connected to the flexible shaft 2. The force transfer screw 6 is freely rotatable in the slider 3. When the motor 1 is started, torque is transmitted from the motor 1 to the flexible shaft 2, and then to the force transfer screw 6 in the slider 3. Through the rotation of the force transfer screw 6, the slider 3 moves along the guide rail 4. The direction of the slider 3 moving along the guide rail 4 depends on the direction of the motor 1 rotating.
[0008] The above description is only a preferred embodiment of the present application, and therefore cannot limit the scope of the present application, that is, equivalent changes and modifications made in accordance with the scope of the patent application and the content of the specification should still be within the scope of the present application.
Claims
1. An electric vehicle window lifter comprising a motor (1) and a slider (3), wherein The slider moves along the guide rail (4), so that the torque is transmitted from the motor (1) to the power screw (6) installed in the slider (3) through the flexible shaft (2), characterized in that the power screw (6) of the slider (3) is installed in the open groove of the in-track thread (5) of the guide rail (4).
2. The power window glazing regulator of claim 1, wherein, The axis of the power screw (6) is parallel to the open groove of the in-track thread (5) in the guide rail (4).
3. The power window glazing regulator of claim 1, wherein, The open groove of the in-track thread (5) is open to the position of the flexible shaft (2), and the open arm of the open groove of the in-track thread (5) is parallel to the plane formed by the axis of the flexible shaft (2).
4. The power window glazing regulator of claim 3, wherein, The open groove of the in-track thread (5) can be semicircular or partially circular, and the legs of the open groove have equal or unequal lengths.
5. The power window glazing regulator according to any one of claims 1-4, wherein, The end of the flexible shaft (2) connected to the power screw (6) is located in the open groove of the in-track thread (5) of the guide rail (4).