A liftable car windshield wiper mechanism and method

Abstract

This invention relates to the field of automotive wiper mechanism technology, and discloses a liftable automotive wiper mechanism and method, including a fixed rod with sleeves at both ends. An electric push rod is located on the outer side of the sleeve, and a fixed rotating shaft is located on the inner side. One end of the fixed rotating shaft is sleeved on and engaged with a movable rotating shaft, allowing the movable rotating shaft to extend and retract along the fixed rotating shaft. A first wiper arm is connected to the end of the movable rotating shaft away from the fixed rotating shaft. The first wiper arm is connected to a second wiper arm, which has a locking pin. An insertion interface is located on the end of the first wiper arm near the second wiper arm. One end of a locking pin pull cable is connected to the locking pin, and the other end passes through the insertion interface and through the first wiper arm, then connects to the fixed rod away from the first wiper arm. The output end of the electric push rod engages with the movable rotating shaft via a connector to drive the movable rotating shaft to rise and fall. The locking pin pull cable allows the locking pin to be inserted into the insertion interface, locking the first and second wiper arms. When the first wiper arm rises, it causes the second wiper arm to disengage from the windshield.

Description

Technical Field

[0001] This invention relates to the field of automotive wiper mechanism technology, and in particular to a liftable automotive wiper mechanism and method. Background Technology

[0002] Windshield wipers are an essential component of car operation, used to remove rainwater, snow, and other impurities from the windshield to ensure clear visibility for the driver. Currently, most windshield wipers consist of a wiper motor, a shaft, a wiper arm, and a wiper blade. They typically operate by the motor driving the shaft, which in turn rotates the wiper arm and blade, thus wiping away rainwater and cleaning the windshield. However, to improve the effectiveness of the wiper blades, the wiper arm is usually designed in two sections, connected by a shaft and spring. This allows the wiper blade on the second section to adhere tightly to the windshield, resulting in a more thorough cleaning of liquids and impurities. However, existing windshield wiper mechanisms have some design and operational shortcomings. First, in snowy winter weather, if the wipers are not raised, prolonged snow accumulation can freeze them to the windshield, preventing them from functioning properly. Users then need to spend considerable time melting the ice, which is inefficient and time-consuming. Secondly, in hot summer weather, the windshield of a vehicle parked outdoors can get extremely hot. If the rubber wiper blades remain attached to the windshield, they may melt and stick together, or even age faster and shorten their lifespan.

[0003] To address the aforementioned issues, in snowy winter weather or hot summer weather, when people park their cars outdoors, they usually manually raise the wiper blades to prevent the windshield from freezing and the blades from sticking together, or to prevent the rubber blades from melting and sticking together due to high temperatures and sun exposure, which would accelerate the aging of the rubber blades and greatly reduce their lifespan. However, this method still has some shortcomings. Manual operation requires the user to get out of the car, which is not only inconvenient but may also pose safety hazards in some situations. In addition, manual operation can easily damage the wipers due to excessive force. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the present invention aims to provide a liftable car windshield wiper mechanism and method. By using an electric push rod to drive the movable rotating shaft to extend and retract relative to the fixed rotating shaft, the first wiper arm can be raised. At the same time, the first and second wiper arms are locked by locking pins to realize the lifting function of the wiper arms. The simultaneous raising of the first and second wiper arms can ensure that the wiper blades are completely separated from the windshield, thereby preventing the wiper blades from freezing or melting in extreme weather conditions.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0006] In a first aspect, a liftable car windshield wiper mechanism includes a fixed rod with sleeves at both ends. An electric push rod is located on the outer side of each sleeve, and a fixed rotating shaft is located on the inner side. One end of the fixed rotating shaft is sleeved on and engaged with a movable rotating shaft, allowing the movable rotating shaft to extend and retract along the fixed rotating shaft. A first wiper arm is connected to the end of the movable rotating shaft away from the fixed rotating shaft. The first wiper arm is connected to a second wiper arm, and a locking pin is slidably mounted on the second wiper arm. A connector is located on the end of the first wiper arm near the second wiper arm. One end of a locking pin pull wire is connected to the locking pin, and the other end passes through the connector and through the first wiper arm, then connects to the fixed rod away from the first wiper arm. The output end of the electric push rod engages with the movable rotating shaft via a connector to drive the movable rotating shaft to rise and fall. When the movable rotating shaft rises, the locking pin is inserted into the connector via the locking pin pull wire.

[0007] As a further implementation, the first scraper arm and the second scraper arm have U-shaped cross sections. The first scraper arm is provided with a connector at one end near the second scraper arm. The connector has a through hole to form a plug interface. The second scraper arm and the first scraper arm are rotatably connected by a pin. A compression spring is provided between the inner sides of the first scraper arm and the second scraper arm.

[0008] As a further implementation, a limiting plate is provided on the inner side of the end of the first scraper arm away from the second scraper arm, and a through hole is provided on the limiting plate for the locking pin pull wire to pass through.

[0009] As a further implementation, the end of the locking pin away from the locking pin pull wire is connected to one end of the return spring, and the other end of the return spring is fixedly connected to the inner side of the second scraper arm.

[0010] As a further implementation, a guide plate is provided on the inner side of the second scraper arm, with a hole on the guide plate at the corresponding insertion interface position for the locking pin to pass through.

[0011] As a further implementation, the fixed rotating shaft has an annular protrusion on its outer side and an annular groove on the inner side of the sleeve. The annular protrusion and the annular groove cooperate to allow the fixed rotating shaft to rotate within the sleeve. The end of the fixed rotating shaft away from the movable rotating shaft is used to connect to the crank connecting rod structure, and the inner side of the other end is provided with a sliding groove arranged along the length direction. A linear slider is provided on the outer side of one end of the movable rotating shaft. The end of the movable rotating shaft is inserted into the inner side of the fixed rotating shaft and cooperates with the linear slider through the sliding groove.

[0012] As a further implementation, the connecting member includes a transmission plate disposed on the periphery of the movable rotating shaft. The transmission plate is provided with an annular groove. The push rod at the output end of the electric push rod passes through the annular groove, and fixed blocks are provided on the push rods on both sides of the annular groove. The extension and retraction of the push rod drives the movable rotating shaft to extend and retract through the fixed blocks and the transmission plate.

[0013] As a further implementation, the electric actuator is connected to the vehicle's control system.

[0014] As a further implementation, a temperature sensor is also included for detecting the temperature of the car's windshield. The temperature sensor is connected to the control system, and when the detected temperature is outside the set range, it controls the electric push rod to raise the wiper mechanism.

[0015] Secondly, a method for raising and lowering a car windshield wiper mechanism, characterized in that it employs any of the above-described raiseable car windshield wiper mechanisms, comprising the following steps:

[0016] When the windshield wiper mechanism needs to be raised, the electric push rod activates, causing the movable shaft to rise relative to the fixed shaft via the connecting piece. This pulls the locking pin cable on the fixed rod, and the locking pin on the second wiper arm inserts into the connector at the end of the first wiper arm, locking the first and second wiper arms. This can also cause the wiper blade mounted on the second wiper arm to detach from the windshield. When the electric push rod lowers the movable shaft, the return spring pulls the locking pin backward, releasing the first and second wiper arms and pressing the wiper blade against the windshield.

[0017] The beneficial effects of the present invention are as follows:

[0018] 1. This invention uses an electric push rod to drive the movable rotating shaft to extend and retract relative to the fixed rotating shaft, which can raise the first wiper arm. At the same time, the first and second wiper arms are locked by a locking pin, realizing the lifting and lowering function of the wiper arms. The simultaneous raising of the first and second wiper arms can ensure that the wiper blades are completely separated from the windshield, thereby preventing the wiper blades from freezing or melting in extreme weather conditions.

[0019] 2. The present invention, through the structural arrangement of locking pin cable, locking pin and return spring, can lock the first wiper arm when it is raised by locking pin cable and locking pin, preventing the second wiper arm from being unable to disengage from the windshield due to the action of the compression spring. When the first wiper arm is lowered, the wiper arms can be unlocked by return spring.

[0020] 3. The electric push rod of the present invention is located on the outside of the sleeve. The push rod cooperates with the movable rotating shaft through the transmission plate. The annular groove can ensure that the wiper does not interfere with the push rod when it is working. The stroke of the push rod is within the safe range, which can ensure the stable operation of the structure.

[0021] 4. The present invention can also determine whether the windshield wipers need to be raised by detecting the temperature of the windshield of the car. Attached Figure Description

[0022] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0023] Figure 1 This is a schematic diagram of the normal state of the car windshield wiper mechanism in an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the raised state of the car windshield wiper mechanism in an embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of the normal state of a car windshield wiper arm in an embodiment of the present invention;

[0026] Figure 4 This is a schematic diagram of the car wiper arm in the raised state in an embodiment of the present invention;

[0027] Figure 5 This is a schematic diagram of the internal structure of the telescopic pivot section in an embodiment of the present invention;

[0028] Figure 6 This is a schematic diagram of the transmission plate in an embodiment of the present invention;

[0029] Figure 7 This is a schematic diagram of the automotive windshield wiper mechanism in an embodiment of the present invention;

[0030] The diagram exaggerates the spacing or dimensions between parts to show their positions; the diagram is for illustrative purposes only.

[0031] The components are as follows: 1. First scraper arm, 2. Second scraper arm, 3. Locking pin pull cable, 4. Telescopic rotating shaft, 5. Electric push rod, 6. Fixed rod, 7. Sleeve, 8. Crank connecting rod mechanism, 9. Limiting plate; 11. Plug connector, 12. Pin, 21. Locking pin, 22. Return spring, 23. Compression spring, 24. Guide plate; 41. Fixed rotating shaft, 411. Annular protrusion, 42. Movable rotating shaft, 421. Linear slider, 422. Transmission plate, 423. Annular groove; 51. Push rod, 52. Push block, 53. Pressure block. Detailed Implementation

[0032] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0033] Example 1

[0034] In a typical embodiment of the present invention, reference is made to Figures 1-7As shown, a liftable car windshield wiper mechanism includes a fixed rod 6 with sleeves 7 at both ends. A telescopic shaft 4 is provided inside the sleeves 7. One end of the telescopic shaft 4 is connected to a crank-connecting rod mechanism to realize the rotation of the telescopic shaft 4, and the other end of the telescopic shaft 4 is connected to the wiper arm. An electric push rod 5 is provided on the outside of the sleeves 7 to drive the telescopic shaft 4 to extend and retract. The wiper arm includes a first wiper arm 1 and a second wiper arm 2. The first wiper arm is connected to the second wiper arm 2. A locking pin is slidably provided on the second wiper arm 2. A plug interface is provided at one end of the first wiper arm near the second wiper arm 2. One end of the locking pin pull wire 3 is connected to the locking pin 21, and the other end passes through the plug interface and through the first wiper arm 1 away from the first wiper arm 1 and is connected to the fixed rod 6. The output end of the electric push rod 5 cooperates with the movable shaft 42 through a connector to drive the movable shaft 42 to rise and fall. When the movable shaft rises, the locking pin 21 is inserted into the plug interface through the locking pin pull wire 3, so that the wiper arm rises.

[0035] like Figure 3 and Figure 4 As shown, both the first scraper arm 1 and the second scraper arm 2 have U-shaped cross-sections. One end of the first scraper arm 1 is hinged to the second scraper arm 2 via a pin 12. A connector 11 is provided at the end of the first scraper arm 1 near the second scraper arm 2, and the connector 11 has a through hole forming a plug-in interface. The connector 11 extends to the inner side of the end of the second scraper arm 2. A compression spring 23 connects the connector 11 and the inner side of the second scraper arm 2. The end of the second scraper arm 2 away from the first scraper arm 1 is used to connect a scraper blade.

[0036] Under the action of the compression spring 23, the first scraper arm 1 can pull the second scraper arm 2 through the compression spring 23, so that the second scraper arm 2 can drive the scraper blade to press against the windshield of the car.

[0037] like Figure 1 and Figure 2 , Figure 7 As shown, a fixed rod 6 is located at the lower end of the car's windshield. Sleeves are located at both ends of the fixed rod 6. A telescopic shaft 4 is housed within each sleeve 7. One end of the telescopic shaft 4 is connected to the wiper arm, and the other end is connected to a crank-connecting rod mechanism 8. The crank-connecting rod mechanism 8 also includes a drive mechanism located in the middle of one side of the fixed rod 6. The corresponding crank and connecting rod form a parallelogram mechanism with the fixed rod 6. The crank-connecting rod mechanism 8 can drive the telescopic shaft 4 to rotate inside the sleeve, thereby driving the wiper arm to reciprocate. The crank-connecting rod mechanism 8 is existing technology and will not be described in detail further.

[0038] like Figure 5As shown, the telescopic shaft 4 consists of a two-section structure, including a fixed shaft 41 and a movable shaft 42. The main body of the fixed shaft 41 is located inside the sleeve 7, and its end extends out of the sleeve for connecting the crank-connecting rod mechanism 8. The outer side of the fixed shaft 41 is provided with an annular protrusion 411, and the inner side of the sleeve 7 is provided with an annular groove at the corresponding position. The annular protrusion 411 and the annular groove cooperate to allow the fixed shaft 41 to rotate inside the sleeve 7 under the drive of the crank-connecting rod mechanism 8.

[0039] One end of the fixed rotating shaft 41, away from the crank-connecting rod mechanism 8, is sleeved around the bottom of the movable rotating shaft 42. The top end of the movable rotating shaft 42 is fixedly connected to the end of the first scraper arm 1. Multiple linear sliders 421 are provided around the bottom of the movable rotating shaft 42. The extension direction of the linear sliders 421 is parallel to the axial direction of the telescopic rotating shaft 4. Correspondingly, multiple grooves are provided inside the fixed rotating shaft 41. The end of the movable rotating shaft 42 is inserted into the inside of the fixed rotating shaft 41 and cooperates with the linear sliders 421 through the grooves. This allows the fixed rotating shaft 41 to drive the movable rotating shaft 42 to rotate through the linear sliders 421, while the movable rotating shaft 42 can extend and retract relative to the fixed rotating shaft 41 through the grooves, thereby realizing the lifting and lowering of the scraper arm.

[0040] like Figure 5 As shown, an electric push rod 5 is provided on the outside of the sleeve 7, and the direction of the push rod 51 at the output end of the electric push rod 5 is parallel to the direction of the telescopic shaft 4.

[0041] like Figure 6 As shown, the connecting component includes a transmission plate 422 fixed around the movable rotating shaft 42. The transmission plate 422 has a fan-shaped structure and an annular groove 423. The push rod 51 passes through the annular groove 423 and slides in cooperation with it. Fixed blocks are provided on the push rods on both sides of the annular groove 423. The fixed blocks are push blocks 52 and pressure blocks 53. The extension and retraction of the push rods drive the transmission plate 422 to move through the push blocks 52 and pressure blocks 53, thereby realizing the extension and retraction of the movable rotating shaft 42 and ultimately realizing the lifting and lowering of the scraper arm.

[0042] In order to achieve the simultaneous lifting of the first scraper arm 1 and the second scraper arm 2, without being affected by the compression spring 23, the first scraper arm 1 and the second scraper arm 2 should be locked, that is, their hinge relationship should be locked.

[0043] like Figures 1-4 As shown, two sets of guide plates 24 are provided on the inner side of the second scraper arm 2. The guide plates 24 have holes for the locking pin 21 to pass through. The locking pin is connected to one end of the locking pin pull wire 3 near the end of the first scraper arm. A limiting plate 9 is provided on the inner side of the first scraper arm away from the second scraper arm. The limiting plate 9 has a through hole for the locking pin pull wire 3 to pass through. After the locking pin pull wire 3 passes through the plug interface on the plug connector 11, it extends along the inner side of the first scraper arm 1, continues to pass through the through hole on the limiting plate 9, and extends to the fixing rod 6 for fixation.

[0044] like Figure 1 and Figure 2 As shown, when the movable pivot 42 extends and the first scraper arm 1 is raised, the distance between the first scraper arm 1 and the fixed rod 6 increases, so that the locking pin cable 3 can pull the locking pin 21. Under the guidance of the guide plate 24, the front end of the locking pin 21 is inserted into the plug connector 11, and the rear end cooperates with the guide plate 24. At this time, when the first scraper arm continues to rise, under the action of the locking pin 21, the hinge relationship between the first scraper arm 1 and the second scraper arm 2 is locked, so that the first scraper arm 1 can drive the scraper blade to rise through the second scraper arm 2 and detach from the windshield.

[0045] To allow the locking pin 21 to retract from the connector 11 when the first scraper arm 1 descends, a return spring is connected to the end of the locking pin away from the locking pin pull wire. The other end of the return spring is fixedly connected to the inner side of the second scraper arm. When the first scraper arm descends, the return spring 22 pulls the locking pin 21, thus unlocking the arm.

[0046] This embodiment uses an electric push rod to raise the wiper arm, and locks the first and second wiper arms with a locking pin to realize the lifting and lowering function of the wiper arm. During the lifting and lowering process, the wiper blade can be separated from the windshield to cope with different weather conditions.

[0047] Understandably, the electric push rod can be connected to the vehicle's control system, allowing the system to control its movement without requiring manual operation. Furthermore, it includes a temperature sensor for detecting the windshield temperature. This sensor is positioned for easy monitoring and connected to the control system. When the temperature detected by the sensor deviates from the set range—in hot or cold weather—the control system can automatically control the electric push rod to raise the wiper mechanism. This method enables automatic wiper raising when the vehicle is in a warm environment, protecting the wipers.

[0048] Understandably, a user interface can also be added, allowing the control system to receive user commands and control the motor drive circuit accordingly. This interface could be an in-vehicle control panel, a mobile app, or other smart devices, facilitating user operation. Through this control system, users can easily achieve automatic wiper raising and lowering, improving both convenience and safety.

[0049] Understandably, the electric push rod's travel is designed within a safe range, allowing the adjustable wiper mechanism to operate stably and reducing potential risks during use.

[0050] Example 2

[0051] In a typical embodiment of the present invention, reference is made to Figures 1-7As shown, a method for raising and lowering a car windshield wiper mechanism, using the raiseable car windshield wiper mechanism described in Embodiment 1, includes the following steps:

[0052] When the car wiper mechanism needs to be raised, the electric push rod 51 is controlled by the control system to move. The push rod 51 pushes the transmission plate 422 through the push block 52. The transmission plate 422 drives the movable rotating shaft 42 to rise relative to the fixed rotating shaft 41, which in turn drives the first wiper arm 1 to rise. This allows the fixed rod 6 to pull the locking pin cable. The locking pin 21 on the second wiper arm 2 is inserted into the insertion interface at the end of the first wiper arm 1, thereby locking the first wiper arm 1 and the second wiper arm 2. This can cause the wiper blade installed on the second wiper arm to detach from the windshield.

[0053] When the electric push rod 5 drives the movable rotating shaft 42 to descend through the pressure block 53 and the transmission plate 422, the distance between the first scraper arm 1 and the fixed rod 6 decreases, and the return spring 22 pulls the locking pin 21 backward, so that the first scraper arm 1 and the second scraper arm 2 are unlocked, and the scraper blade is pressed back onto the windshield.

[0054] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A retractable car windshield wiper mechanism, characterized in that, The device includes a fixed rod with sleeves at both ends. An electric push rod is located on the outer side of the sleeve, and a fixed rotating shaft is located on the inner side. One end of the fixed rotating shaft is sleeved on and engaged with a movable rotating shaft, allowing the movable rotating shaft to extend and retract along the fixed rotating shaft. The end of the movable rotating shaft away from the fixed rotating shaft is connected to a first scraper arm, which is connected to a second scraper arm. A locking pin is slidably mounted on the second scraper arm. An insertion interface is located on the end of the first scraper arm near the second scraper arm. One end of the locking pin pull wire is connected to the locking pin, and the other end passes through the insertion interface, through the first scraper arm, and away from the first scraper arm before connecting to the fixed rod. The output end of the electric push rod engages with the movable rotating shaft through a connector to drive the movable rotating shaft to rise and fall. When the movable rotating shaft rises, the locking pin is inserted into the insertion interface through the locking pin pull wire.

2. The liftable car windshield wiper mechanism according to claim 1, characterized in that, The first scraper arm and the second scraper arm have U-shaped cross sections. The first scraper arm has a connector near the end of the second scraper arm. The connector has a through hole to form a plug interface. The second scraper arm and the first scraper arm are rotatably connected by a pin. A compression spring is provided between the inner sides of the first scraper arm and the second scraper arm.

3. The liftable car windshield wiper mechanism according to claim 1, characterized in that, A limiting plate is provided on the inner side of the end of the first scraper arm away from the second scraper arm. The limiting plate has a through hole for the locking pin pull wire to pass through.

4. A liftable car windshield wiper mechanism according to claim 3, characterized in that, The end of the locking pin away from the locking pin pull wire is connected to one end of the return spring, and the other end of the return spring is fixedly connected to the inner side of the second scraper arm.

5. A liftable car windshield wiper mechanism according to claim 4, characterized in that, The second scraper arm has a guide plate on its inner side, with a hole on the guide plate at the corresponding insertion interface position for the locking pin to pass through.

6. The liftable car windshield wiper mechanism according to claim 1, characterized in that, The fixed rotating shaft has an annular protrusion on its outer side and an annular groove on the inner side of the sleeve. The annular protrusion and the annular groove cooperate to allow the fixed rotating shaft to rotate within the sleeve. The end of the fixed rotating shaft away from the movable rotating shaft is used to connect to the crank connecting rod structure, and the inner side of the other end is provided with a sliding groove arranged along the length direction. The outer side of one end of the movable rotating shaft is provided with a linear slider. The end of the movable rotating shaft is inserted into the inner side of the fixed rotating shaft and cooperates with the linear slider through the sliding groove.

7. A liftable car windshield wiper mechanism according to claim 6, characterized in that, The connecting component includes a transmission plate located around the movable rotating shaft. The transmission plate has an annular groove. The push rod at the output end of the electric push rod passes through the annular groove, and there are fixing blocks on the push rods on both sides of the annular groove. The extension and retraction of the push rod drives the movable rotating shaft to extend and retract through the fixing blocks and the transmission plate.

8. A liftable car windshield wiper mechanism according to claim 1, characterized in that, The electric push rod is connected to the vehicle's in-vehicle control system.

9. A liftable car windshield wiper mechanism according to claim 8, characterized in that, It also includes a temperature sensor for detecting the temperature of the car's windshield. The temperature sensor is connected to the control system, and when the detected temperature is outside the set range, it controls the electric push rod to raise the wiper mechanism.

10. A method for raising and lowering a car windshield wiper mechanism, characterized in that, The retractable car windshield wiper mechanism as described in claim 4 includes the following steps: When the windshield wiper mechanism needs to be raised, the electric push rod activates, causing the movable shaft to rise relative to the fixed shaft via the connecting piece. This pulls the locking pin cable on the fixed rod, and the locking pin on the second wiper arm inserts into the connector at the end of the first wiper arm, locking the first and second wiper arms. This can also cause the wiper blade mounted on the second wiper arm to detach from the windshield. When the electric push rod lowers the movable shaft, the return spring pulls the locking pin backward, releasing the first and second wiper arms and pressing the wiper blade against the windshield.

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