A vehicle door outer water cut, vehicle and method of operation

Abstract

The application discloses a kind of car door outer water cutting, car and operating method, including water cutting body, water cutting lip, pivot, forward and reverse motor and bearing;The water cutting lip is rotatably connected with the lower right end of water cutting body by pivot;The left side wall of water cutting lip and the right side wall corresponding to water cutting body are flexibly contacted;The both ends of pivot are respectively connected with bearing and forward and reverse motor;Bearing and forward and reverse motor are respectively fixed to the front and rear end of water cutting body;The lip of the application can be disassembled and adjusted, can actively change the lip posture of outer water cutting, independently adjust the matching relationship of water cutting and glass, to adapt to different use conditions, enhance the performance of outer water cutting, improve the service life of outer water cutting as a whole.

Description

Technical Field

[0001] This invention relates to the field of automotive technology, and more particularly to an external water cutter for a car door, a car, and a method for operating it. Background Technology

[0002] The exterior water deflector of a car door is a component that supports the raising and lowering of the glass, ensures the sealing of the door, and also has a certain decorative function.

[0003] Currently, the structure of external water-cutting parts on the market is relatively simple. They are attached to the outer panel of the car door by clips or metal frames, and are integrated with stainless steel or aluminum trim. They are easily damaged during disassembly and assembly and cannot be reused.

[0004] The fit between the water-cutting lip and the glass is determined by the basic cross-section. As the user's usage time increases, the sealing performance of the external water-cutting gradually decreases due to the permanent deformation of the rubber material under compression, the water-wiping effect weakens, and the user experience deteriorates. Summary of the Invention

[0005] To address the aforementioned issues, this invention proposes an external water cutter for a car door, a car, and an operating method. The lip of the water cutter is detachable and adjustable, enabling the active alteration of its lip posture and autonomous adjustment of the fit between the water cutter and the glass. This adapts to different usage scenarios, enhances the performance of the external water cutter, and extends its overall service life.

[0006] This invention proposes an external water cutter for a car door, comprising a water cutter body, a water cutter lip, a rotating shaft, a forward and reverse motor, and bearings;

[0007] The water-cutting lip is rotatably connected to the lower right end of the water-cutting body via a rotating shaft. The water-cutting lip can be disassembled and adjusted from the water-cutting body, and the water-cutting lip with reduced performance can be replaced, thereby extending the overall service life of the outer water-cutting body.

[0008] The left side wall of the water-cutting lip is flexibly in contact with the corresponding right side wall of the water-cutting body;

[0009] Bearings and a forward / reverse motor are connected to both ends of the rotating shaft;

[0010] The bearings and the forward and reverse motors are fixed at the front and rear ends of the water cutter body, respectively. The forward and reverse motors can rotate forward or backward by a certain angle according to the needs of the environment where the car window glass is located, thereby changing the lip posture of the outer water cutter and autonomously adjusting the fit between the water cutter and the glass, thus adapting to different usage conditions and enhancing the performance of the outer water cutter.

[0011] The water-cutting body has an inverted U-shaped door panel edging connection groove on the middle left side. This groove can be inserted and connected to the door panel edging, which provides support for the overall water-cutting mechanism on the exterior of the door. The water-cutting body has a rotating shaft receiving arc groove on the lower right side. The water-cutting lip includes a support frame and a flexible lip. The upper part of the support frame is covered and fixed to the lower part of the flexible lip. The rotating shaft sidewall has a rectangular groove extending downward through the shaft. The lower end of the support frame is matched and accommodated in the rectangular groove and is limited and fixed by the locking mechanism of the rectangular groove. The rotating shaft is horizontally accommodated in the rotating shaft receiving arc groove. The rotating shaft can drive the water-cutting lip to rotate in both directions by a certain angle, adjusting the interference of the water-cutting lip with the glass (the horizontal interference between the right end face of the water-cutting lip and the outer surface of the glass). The left side wall of the flexible lip has a first water-blocking sealing protrusion. The free end of the first water-blocking sealing protrusion contacts the right side wall of the water-cutting body to prevent external foreign objects or water from falling onto the rotating shaft and affecting its operation.

[0012] A triangular limiting tongue protrudes from one inner side wall of the middle of the rectangular groove, forming a locking mechanism. The supporting frame piece has a chamfered right-angled locking notch corresponding to the limiting tongue position. The vertical notch of the chamfered right-angled locking notch extends to the lower end face of the supporting frame piece. The limiting tongue can be fitted into the horizontal notch of the chamfered right-angled locking notch. When assembling the water-cut lip and the rotating shaft, first align the vertical notch of the chamfered right-angled locking notch at the lower end face of the supporting frame piece with the limiting tongue of the rectangular groove and move it downwards. The support frame piece is embedded in the rectangular groove, and then the support frame piece is horizontally moved within the rectangular groove so that the limiting tongue is accommodated in the horizontal missing groove of the inverted right-angle locking limiting missing part, thus completing the vertical limiting and fixing of the support frame piece by the limiting tongue within the rectangular groove. Then, bearings and forward and reverse motors are connected to the left and right ends of the rotating shaft respectively. The bearings and forward and reverse motors restrict the horizontal displacement of the support frame piece in the rectangular groove. Then, the rotating shaft is rotated and embedded into the rotating shaft accommodating arc groove of the water cutter body, and the bearings and forward and reverse motors are fixed to the left and right ends of the water cutter body respectively.

[0013] The rectangular groove has left and right limiting holes on its two side walls at corresponding positions. The support frame piece is housed in the rectangular groove, and the support frame piece has a receiving through hole at the corresponding position of the limiting hole. The locking mechanism of the rectangular groove includes a limiting pin, which passes through the left limiting hole, the receiving through hole, and the right limiting hole to limit and fix the support frame piece of the rotating shaft and the water-cutting lip. When assembling the water-cutting lip and the rotating shaft, the lower end of the support frame piece is first housed in the rectangular groove, and then the limiting pin is inserted into the left limiting hole, the receiving through hole, and the right limiting hole in sequence to complete the locking mechanism of the rectangular groove to limit and fix the support frame piece vertically and in the length direction of the rectangular groove. Then, bearings and forward and reverse motors are connected to the left and right ends of the rotating shaft, respectively. The bearings and forward and reverse motors further limit the horizontal displacement of the support frame piece in the rectangular groove. Then, the rotating shaft is rotated and embedded into the rotating shaft receiving arc groove of the water-cutting body, and the bearings and forward and reverse motors are fixed to the left and right ends of the water-cutting body, respectively.

[0014] The water-cutting body is made of hard plastic to provide support for the water-cutting lip. The flexible lip is made of elastic rubber. The upper end of the flexible lip is bent to the left and has a second water-blocking sealing protrusion. Its function is to cooperate with the upper end of the water-cutting body to seal and prevent dust and moisture from entering the shaft at the lower part of the flexible lip, thereby affecting the rotation of the shaft.

[0015] The upper end of the outer surface of the door panel edge connecting groove of the water cutter body is provided with an upper locking part for the decorative strip between the upper end of the groove and the left side wall of the water cutter body. The lower end of the left side wall of the door panel edge connecting groove is provided with a lower locking part for the decorative strip. The upper and lower ends of the decorative strip are respectively matched and locked at the upper locking part and the lower locking part of the decorative strip, and the inner wall of the decorative strip is limited to contact with the outer wall of the door panel edge connecting groove.

[0016] The upper end of the water-cutting body is bent to the right and has a shielding strip to cooperate with the second water-blocking sealing protrusion on the edge of the water-cutting lip to prevent foreign objects and water from falling onto the rotating shaft.

[0017] The present invention also proposes an automobile, including a door, a window glass, an ECU (Electronic Control Unit), a central control screen, and an outer water cutter for the door. The door panel edging on the inner wall of the door is inserted and fixed with the door panel edging connecting groove of the water cutter body. The right end of the flexible lip is in contact with the outer surface of the window glass hidden inside the door. A forward and reverse motor is electrically connected to the ECU through a wire, and the ECU is electrically connected to the central control screen through a wire.

[0018] The interference between the flexible lip and the window glass is 1.1mm-3.5mm; the rotation value of the flexible lip relative to the initial angle of the rectangular groove of the rotating shaft (the initial angle is the angle between the rectangular groove of the rotating shaft and the Z direction of 45°) is between ±5°.

[0019] The present invention also proposes an operation method for the exterior water cutter of a car door. According to the preset environment mode option on the central control screen, the ECU outputs a control signal to make the forward and reverse motor rotate within ±5° of the initial angle of the rectangular groove of the rotating shaft, so that the interference between the water cutter lip and the glass is adjusted within the range of 1.1mm-3.5mm, so as to realize the normal mode, accelerated lifting mode or enhanced mode of the exterior water cutter of the car door for raising and lowering the glass.

[0020] Normal mode: When the driver selects normal mode on the central control screen, the ECU outputs a control signal to make the forward and reverse motor rotate to the initial 0° angle of the rectangular groove of the rotating shaft. At this time, the interference between the water-cut lip and the glass is 2.2mm-2.4mm, which meets the normal window lifting requirements.

[0021] Accelerated Lifting Mode: When the ambient temperature is low and the glass lifting speed is slow, the driver selects the accelerated lifting mode on the central control screen. The ECU transmits a signal to the door's forward and reverse motors, causing the motors to rotate 5° counterclockwise from the initial 0° angle of the rectangular groove on the shaft. At this time, the interference between the lip and the glass is 1.1mm-1.3mm, reducing the glass's lifting resistance and increasing the glass lifting speed.

[0022] Enhanced Mode: When there are water stains on the glass and the glass shakes a lot, the driver selects Enhanced Mode. The ECU sends a signal to the door's forward and reverse motors, causing the motors to rotate 5° clockwise from the initial 0° angle of the rectangular groove on the shaft. At this time, the interference between the lip and the glass is 3.3mm-3.5mm, the holding force between the water-cutting lip and the glass increases, and the water-retaining effect of the water-cutting lip on the glass is enhanced.

[0023] Beneficial effects

[0024] The advantages of this invention are:

[0025] 1. When the resistance of glass lifting is high, adjusting the posture of the outer water-cutting lip to reduce the interference between the lip and the glass can improve the glass lifting speed.

[0026] 2. When the glass door shakes excessively, adjust the posture of the outer water-cutting lip to increase the interference between the lip and the glass, reduce the shaking of the glass, and improve the stability of the glass lifting and lowering.

[0027] 3. When replacing the glass, the lip can be removed separately to avoid the glass movement space, so as to achieve glass removal and installation without damaging the outer waterstop body;

[0028] 4. In low-temperature environments, adjust the posture of the outer water-cut lip to reduce the interference between the lip and the glass, thereby improving the glass lifting performance at low temperatures. Attached Figure Description

[0029] Figure 1 This is a partial structural diagram of the present invention. Figure 1 .

[0030] Figure 2 This is a partial structural diagram of the present invention. Figure 2 .

[0031] Figure 3 This is a partial cross-sectional structural diagram of Embodiment 1 of the present invention.

[0032] Figure 4 This is a schematic diagram of the back structure of the water-cut lip in Embodiment 1 of the present invention.

[0033] Figure 5 This is a partial cross-sectional structural diagram of Embodiment 2 of the present invention.

[0034] Figure 6 This is a schematic diagram of the back structure of the water-cut lip edge in Embodiment 2 of the present invention.

[0035] Figure 7 This is a schematic diagram of the interference quantity structure between the water-cut lip and the glass in this invention. Figure 1 .

[0036] Figure 8 This is a schematic diagram of the interference quantity structure between the water-cut lip and the glass in this invention. Figure 2 .

[0037] Figure 9 This is a schematic diagram of the interference quantity structure between the water-cut lip and the glass in this invention. Figure 3 .

[0038] In the picture:

[0039] 1. Water cutting body;

[0040] 11. Door panel edge binding joint groove;

[0041] 111. The snap-fit ​​part on the decorative strip;

[0042] 112. Lower snap-fit ​​part of the decorative strip;

[0043] 12. The rotating shaft is fitted with an arc groove;

[0044] 13. Masking strip;

[0045] 2. Water cut lip edge;

[0046] 21. Support frame piece;

[0047] 211. Inverted right-angled locking limit missing part;

[0048] 212. Accommodating through hole;

[0049] 22. Soft lip edges;

[0050] 221. First water-blocking sealing strip;

[0051] 222. Second water-blocking sealing strip;

[0052] 3. Shaft;

[0053] 31. Rectangular groove;

[0054] 311. Limiting tongue;

[0055] 312. Limiting perforation;

[0056] 313. Limit pin;

[0057] 4. Reverse-rotating motor;

[0058] 5. Bearings;

[0059] 6. Decorative strips;

[0060] 7. Car window glass. Detailed Implementation

[0061] To make the technical problems solved by the present invention, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely for explaining the present invention and are not intended to limit the present invention. Furthermore, it should be noted that, for ease of description, only the parts related to the present invention are shown in the accompanying drawings, not all of them.

[0062] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions.

[0063] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0064] Example 1

[0065] See Figures 1-4As shown, an external water cutter for a car door includes a water cutter body 1, a water cutter lip 2, a rotating shaft 3, a forward and reverse motor 4, and a bearing 5.

[0066] The water-cutting lip 2 is rotatably connected to the lower right end of the water-cutting body 1 via a rotating shaft 3;

[0067] The left side wall of the water-cutting lip 2 is flexibly in contact with the corresponding right side wall of the water-cutting body 1;

[0068] The two ends of the rotating shaft 3 are respectively connected to bearings 5 ​​and forward / reverse motors 4;

[0069] The bearing 5 and the forward and reverse motor 4 are respectively fixed to the front and rear ends of the water cutting body 1.

[0070] The water-cutting body 1 has an inverted U-shaped door panel edge connecting groove 11 on the middle left side and a rotating shaft receiving arc groove 12 on the lower right side. The water-cutting lip 2 includes a supporting skeleton piece 21 and a flexible lip 22. The upper part of the supporting skeleton piece 21 covers and is fixed to the lower part of the flexible lip 22. The side wall of the rotating shaft 3 has a rectangular groove 31 that passes through the shaft and points downward. The lower end of the supporting skeleton piece 21 is matched and accommodated in the rectangular groove 31 and is limited and fixed by the locking mechanism of the rectangular groove 31. The rotating shaft 3 is horizontally accommodated in the rotating shaft receiving arc groove 12. The left side wall of the flexible lip 22 has a first water-blocking sealing protrusion 221. The free end of the first water-blocking sealing protrusion 221 contacts the right side wall of the water-cutting body 1.

[0071] A triangular limiting tongue 311 protrudes from one inner side wall of the middle of the rectangular groove 31. The limiting tongue 311 constitutes a locking mechanism. The supporting skeleton piece 21 has an inverted right-angled locking limiting missing part 211 corresponding to the position of the limiting tongue 311. The vertical notch of the inverted right-angled locking limiting missing part 211 extends to the lower end face of the supporting skeleton piece 21. The limiting tongue 311 can be matched and accommodated in the horizontal missing groove of the inverted right-angled locking limiting missing part 211.

[0072] The water-cutting body 1 is made of hard plastic, and the flexible lip 22 is made of elastic rubber. The upper end of the flexible lip 22 is bent to the left and has a second water-blocking sealing protrusion 222.

[0073] The upper end of the outer surface of the door panel edge-connecting groove 11 of the water-cutting body 1 is provided with an upper decorative strip snap-fit ​​part 111 between the upper end of the groove and the left side wall of the water-cutting body 1. The lower end of the left side wall of the door panel edge-connecting groove 11 is provided with a lower decorative strip snap-fit ​​part 112. The upper and lower ends of the decorative strip 6 are respectively matched and snapped at the upper decorative strip snap-fit ​​part 111 and the lower decorative strip snap-fit ​​part 112, and the inner wall of the decorative strip 6 is limited to contact with the outer wall of the door panel edge-connecting groove 11.

[0074] The upper end of the water-cutting body 1 is bent to the right and has a shielding strip 13.

[0075] Example 2

[0076] See Figures 1-2 , Figures 5-6 As shown, an exterior water cutter for a car door differs from Embodiment 1 in that the rectangular groove 31 has a left limiting through hole 312 and a right limiting through hole 312 respectively at corresponding positions on the two side walls of the middle part. The support frame piece 21 is housed in the rectangular groove 31, and the support frame piece 21 has a receiving through hole 212 at the corresponding position of the limiting through hole 312. The locking mechanism of the rectangular groove 31 includes a limiting pin 313, which passes through the left limiting through hole 312, the receiving through hole 212 and the right limiting through hole 312 respectively to limit and fix the support frame piece 21 of the rotating shaft 3 and the water cutter lip 2.

[0077] Example 3

[0078] See Figures 1-4 , Figure 7 As shown, an automobile includes a door, a window glass 7, an ECU, a central control screen, and an outer water cutter for the door. The door panel edging (not shown in the figure) on the inner wall of the door is inserted and fixed to the door panel edging connecting groove 11 of the water cutter body 1. The right end of the flexible lip 22 is in contact with the outer surface of the window glass hidden inside the door. The forward and reverse motor 4 is electrically connected to the ECU (not shown in the figure) through wires. The ECU is electrically connected to the central control screen (not shown in the figure) through wires.

[0079] The interference between the flexible lip 22 and the window glass is 2.3mm; the rotation value of the initial angle of the flexible lip 22 relative to the rectangular groove of the rotating shaft is 0°.

[0080] Example 4

[0081] See Figures 1-4 , Figure 7 As shown, an operation method for an exterior water cutter on a car door involves the ECU outputting a control signal based on the preset environment mode option on the central control screen. This causes the forward and reverse motors to rotate within ±5° of the initial angle of the rectangular groove on the rotating shaft, adjusting the interference between the water cutter lip and the glass within the range of 1.1mm-3.5mm. This allows for the implementation of normal mode, accelerated lifting mode, or enhanced mode for the exterior water cutter to raise and lower the glass.

[0082] Normal mode: When the driver selects normal mode on the central control screen, the ECU outputs a control signal to make the forward and reverse motor rotate to the initial 0° angle of the rectangular groove of the rotating shaft. At this time, the interference between the water-cut lip and the glass is 2.3mm, which meets the normal window lifting requirements.

[0083] Example 5

[0084] See Figures 1-4 , Figure 8As shown, an operation method for an exterior water cutter on a car door involves the ECU outputting a control signal based on the preset environment mode option on the central control screen. This causes the forward and reverse motors to rotate within ±5° of the initial angle of the rectangular groove on the rotating shaft, adjusting the interference between the water cutter lip and the glass within the range of 1.1mm-3.5mm. This allows for the implementation of normal mode, accelerated lifting mode, or enhanced mode for the exterior water cutter to raise and lower the glass.

[0085] Accelerated Lifting Mode: When the ambient temperature is low and the glass lifting speed is slow, the driver selects the accelerated lifting mode on the central control screen. The ECU transmits a signal to the door's forward and reverse motors, causing the motors to rotate 5° counterclockwise from the initial 0° angle of the rectangular groove on the shaft. At this time, the interference between the lip and the glass is 1.2mm, reducing the resistance to glass lifting and increasing the glass lifting speed.

[0086] Example 6

[0087] See Figures 1-4 , Figure 9 As shown, the present invention also proposes an operation method for the exterior water cutter of a car door. According to the preset environmental mode option on the central control screen, the ECU outputs a control signal to make the forward and reverse motor rotate within ±5° of the initial angle of the rectangular groove of the rotating shaft, so that the interference between the water cutter lip and the glass is adjusted within the range of 1.1mm-3.5mm, so as to realize the normal mode, accelerated lifting mode or enhanced mode of the exterior water cutter of the car door for raising and lowering the glass.

[0088] Enhanced Mode: When there are water stains on the glass and the glass shakes a lot, the driver selects the enhanced mode. The ECU sends a signal to the door's forward and reverse motors, causing the motors to rotate 5° clockwise from the initial 0° angle of the rectangular groove on the shaft. At this time, the interference between the lip and the glass is 3.4mm, the holding force between the water-cutting lip and the glass increases, and the water-retaining effect of the water-cutting lip on the glass is enhanced.

[0089] Although the invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the invention without departing from the spirit and scope of the invention as defined in the appended claims, all of which shall be within the scope of protection of the invention.

Claims

1. A water cutter for the exterior of a car door, characterized in that: It includes the water-cutting body (1), the water-cutting lip (2), the rotating shaft (3), the forward and reverse motor (4), and the bearing (5); The water-cutting lip (2) is rotatably connected to the lower right end of the water-cutting body (1) via a rotating shaft (3); The left side wall of the water-cutting lip (2) is flexibly in contact with the right side wall of the water-cutting body (1); The two ends of the rotating shaft (3) are respectively connected to bearings (5) and forward and reverse motors (4); The bearing (5) and the forward and reverse motor (4) are respectively fixed to the front and rear ends of the water cutting body (1); The water-cutting body (1) has an inverted U-shaped door panel edge connecting groove (11) in the middle of the left side, and a rotating shaft receiving arc groove (12) in the lower right side of the water-cutting body (1). The upper end of the water-cutting body (1) is bent to the right and has a shielding strip (13). The water-cutting lip (2) includes a support frame piece (21) and a flexible lip (22). The upper part of the support frame piece (21) is covered and fixed to the lower part of the flexible lip (22). The side wall of the rotating shaft (3) has a rectangular groove (31) that passes through the axis and descends. The lower end of the support frame piece (21) is matched and accommodated in the rectangular groove (31) and is limited and fixed by the locking mechanism of the rectangular groove (31). The rotating shaft (3) is horizontally accommodated in the rotating shaft receiving arc groove (12). The left side wall of the flexible lip (22) has a first water-blocking sealing protrusion (221). The free end of the first water-blocking sealing protrusion (221) contacts the right side wall of the water-cutting body (1).

2. The external water cutter for a car door according to claim 1, characterized in that: A triangular limiting tongue (311) is provided on the inner side wall of one side of the middle of the rectangular groove (31). The limiting tongue (311) constitutes a locking mechanism. The supporting skeleton piece (21) is provided with an inverted right-angled locking limiting missing part (211) at the position of the limiting tongue (311). The vertical notch of the inverted right-angled locking limiting missing part (211) extends to the lower end face of the supporting skeleton piece (21). The limiting tongue (311) can be matched and accommodated in the horizontal missing groove of the inverted right-angled locking limiting missing part (211).

3. The external water cutter for a car door according to claim 1, characterized in that: The rectangular groove (31) has left and right limiting holes respectively on the two side walls of the middle part. The support frame piece (21) is housed in the rectangular groove (31), and the support frame piece (21) has a receiving through hole (212) at the corresponding position of the limiting hole. The locking mechanism of the rectangular groove (31) includes a limiting pin (313). The limiting pin (313) passes through the left limiting hole, the receiving through hole (212) and the right limiting hole respectively to limit and fix the support frame piece (21) of the rotating shaft (3) and the water-cut lip (2).

4. The external water cutter for a car door according to claim 1, characterized in that: The water-cutting body (1) is made of hard plastic, and the flexible lip (22) is made of elastic rubber. The upper end of the flexible lip (22) is bent to the left and has a second water-blocking sealing protrusion (222).

5. The external water cutter for a car door according to claim 1, characterized in that: The upper end of the outer surface of the door panel edge connecting groove (11) of the water-cutting body (1) is provided with a decorative strip upper snap-fit ​​part (111) between the upper end of the door panel edge connecting groove (11) and the left side wall of the water-cutting body (1). The lower end of the left side wall of the door panel edge connecting groove (11) is provided with a decorative strip lower snap-fit ​​part (112). The upper and lower ends of the decorative strip (6) are respectively matched and snapped at the decorative strip upper snap-fit ​​part (111) and the decorative strip lower snap-fit ​​part (112), and the inner wall of the decorative strip (6) is limited to contact with the outer wall corresponding to the door panel edge connecting groove (11).

6. A car, characterized in that: The system includes a car door, a car window glass, an ECU and a central control screen, and also includes a car door external water cutter as described in any one of claims 1-5. The door panel edging on the inner wall of the car door is inserted and fixed to the door panel edging connecting groove (11) of the water cutter body (1). The right end of the flexible lip (22) is in contact with the outer surface of the car window glass hidden inside the car door. The forward and reverse motor (4) is electrically connected to the ECU through a wire, and the ECU is electrically connected to the central control screen through a wire.

7. The automobile according to claim 6, characterized in that: The interference between the flexible lip (22) and the window glass is 1.1mm-3.5mm; the rotation value of the flexible lip (22) relative to the initial angle of the rectangular groove of the rotating shaft is between ±5°.

8. A method for operating an external water cutter on a vehicle door, applied to a vehicle as described in claim 6 or 7, characterized in that: Based on the preset environment mode options on the central control screen, the ECU outputs control signals to make the forward and reverse motors rotate within ±5° of the initial angle of the rectangular groove of the rotating shaft, so that the interference between the water-cutting lip and the glass is adjusted within the range of 1.1mm-3.5mm, so as to realize the normal mode, accelerated lifting mode or enhanced mode of the water-cutting lip on the door for raising and lowering the glass.

9. The method for operating the external water cutter of the vehicle door according to claim 8, characterized in that: Normal mode: When the driver selects normal mode on the central control screen, the ECU outputs a control signal to make the forward and reverse motor rotate to the initial 0°-2° angle of the rectangular groove of the rotating shaft. At this time, the interference between the water-cut lip and the glass is 2.2mm-2.4mm, which meets the normal window lifting requirements. Accelerated Lifting Mode: When the ambient temperature is low and the glass lifting speed is slow, the driver selects the accelerated lifting mode on the central control screen. The ECU transmits a signal to the door's forward and reverse motors, causing the motors to rotate counterclockwise by 3°-5° from the initial 0° angle of the rectangular groove of the shaft. At this time, the interference between the lip and the glass is 1.1mm-1.3mm, reducing the glass's lifting resistance and increasing the glass lifting speed. Enhanced Mode: When there are water stains on the glass and the glass shakes a lot, the driver selects Enhanced Mode. The ECU sends a signal to the door's forward and reverse motors, causing the motors to rotate clockwise by 3°-5° from the initial 0° angle of the rectangular groove on the shaft. At this time, the interference between the lip and the glass is 3.3mm-3.5mm, the holding force between the water-cutting lip and the glass increases, and the water-retaining effect of the water-cutting lip on the glass is enhanced.

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