A wiper

Abstract

A windshield wiper includes a motor, a drive wheel, a linkage mechanism, a rotating shaft, a wiper arm, and a control assembly. The control assembly includes a protrusion, a spring, a first connecting plate, and a second connecting plate. A cam-shaped protrusion is synchronously mounted on the end of the drive wheel's shaft. The spring is located on one side of the end of the shaft, with one end connected to the first connecting plate. When the protrusion of the protrusion abuts against the spring as the shaft rotates, the spring is deformed under pressure, causing its other end to move away from the second connecting plate and disconnecting the electrical connection between the first and second connecting plates. When the protrusion of the protrusion moves away from the spring, the other end of the spring returns to its original position and abuts against the second connecting plate, thus electrically connecting the first and second connecting plates. The first and second connecting plates are located between the connection lines of the motor and the power supply. In this way, the protrusion, driven by the rotation of the drive wheel, can abut against the spring to trigger a corresponding control signal, thereby achieving the reset and braking of the wiper arm, improving product reliability.

Description

Technical Field

[0001] This utility model relates to the technical field of windshield wipers. Background Technology

[0002] Windshield wipers are essential accessories installed on the windshields of vehicles or boats. Their function is to clear rain, snow, dust, and other debris from the windshield that obstructs vision. Therefore, they play a vital role in driving safety.

[0003] Existing windshield wipers typically include a motor, worm gear, worm wheel, linkage mechanism, circuit board, rotating shaft, wiper arm, and reset mechanism. The motor drives the worm gear to rotate, which in turn drives the linkage mechanism to move the rotating shaft and wiper arm. The reset mechanism is connected to the circuit board and usually includes a return plate located on the worm wheel and three return springs that elastically press against the return plate. Braking and reset actions are achieved through the movable interaction of the return springs with notches and protrusions on the return plate. However, after prolonged elastic contact, the return springs can experience elastic fatigue, leading to a decrease in the reliability of reset and braking. Utility Model Content

[0004] The purpose of this utility model is to provide a windshield wiper that has the advantage of improving product reliability.

[0005] To achieve the above objectives, the solution of this utility model is:

[0006] A windshield wiper includes a motor, a drive wheel, a linkage mechanism, a rotating shaft, and a wiper arm; the motor is connected to the drive wheel for transmission, one end of the linkage mechanism is eccentrically hinged to the drive wheel, the other end of the linkage mechanism is connected to one end of the rotating shaft, and the wiper arm is mounted on the other end of the rotating shaft; the motor drives the drive wheel to rotate, the rotation of the drive wheel drives the linkage mechanism to move, and the movement of the linkage mechanism causes the rotating shaft to rotate, causing the wiper arm to swing.

[0007] It also includes a control component; the control component includes a protrusion, a spring, a first connecting piece, and a second connecting piece; the protrusion is synchronously mounted on the end of the drive wheel shaft, the protrusion is cam-shaped and has a radially protruding protrusion; the spring is disposed on one side of the end of the shaft, one end of the spring is connected to and fixed to the first connecting piece, and the other end of the spring is in contact with the second connecting piece.

[0008] When the protrusion of the bump abuts against the spring piece as the shaft rotates, the spring piece is deformed by pressure, causing its other end to move away from the second connecting piece and disconnecting the electrical connection between the first connecting piece and the second connecting piece. When the protrusion of the bump moves away from the spring piece, the other end of the spring piece returns to its original position and abuts against the second connecting piece, making the first connecting piece and the second connecting piece electrically connected. The first connecting piece and the second connecting piece are located between the connection lines of the motor and the power supply.

[0009] Furthermore, the protrusion is detachably installed at the end of the rotating shaft; before the drive wheel rotates, the connection line between the protrusion of the protrusion and the axis of the rotating shaft is perpendicular to the spring piece, and the protrusion is configured to abut against or move away from the spring piece.

[0010] Furthermore, the outer peripheral wall of the end of the rotating shaft has two symmetrically arranged positioning planes; the middle part of the protrusion has a positioning hole for the end of the rotating shaft to pass through, and the positioning hole has two inner planes opposite to the positioning planes; the connecting line between the protrusion and the center of the protrusion is perpendicular to the inner plane.

[0011] Furthermore, the positioning hole has two spaced-apart, radially protruding locking blocks between its two inner planes; the outer peripheral wall of the end of the rotating shaft is recessed with a locking groove for the locking blocks to be detachably engaged.

[0012] Furthermore, the end of the spring piece that connects to the first connecting piece is bent to form a connecting portion, and the connecting portion is used to connect and fix it to the first connecting piece.

[0013] Furthermore, it also includes a housing; the drive wheel is installed inside the housing; the end of the drive wheel's shaft extends outward from the housing and is fitted with the protrusion; the spring, the first connecting piece, and the second connecting piece are all installed outside the housing; the first connecting piece and the second connecting piece are both "L" shaped and are detachably locked to a metal base installed outside the housing by screws.

[0014] Furthermore, it also includes a housing; the housing includes a lower shell, an upper cover, and a sealing ring; the lower shell has a housing space with an open top, the upper cover is detachably installed at the open top, and the waterproof sealing ring is sealed between the upper cover and the lower shell; the drive wheel and the linkage mechanism are both installed in the housing space; a transmission component installed in the housing space is provided between the motor and the drive wheel, and the motor drives the transmission component to rotate, thereby causing the drive wheel to rotate.

[0015] Furthermore, the transmission assembly includes a worm gear, a primary transmission wheel, and a secondary transmission wheel; the worm gear is coaxially connected to the power end of the motor and meshes with the large helical gear of the primary transmission wheel, the small spur gear of the primary transmission wheel meshes with the large spur gear of the secondary transmission wheel, and the small gear of the secondary transmission wheel meshes with the drive wheel.

[0016] Furthermore, the linkage mechanism includes a connecting rod and a swing rod, with one end of the connecting rod and the swing rod hinged together. The other end of the connecting rod has a hinge hole, through which an eccentric shaft passes. The other end of the swing rod is connected to a rotating shaft. The drive wheel has two eccentric holes with different eccentric distances on its side near the top cover. These eccentric holes allow the eccentric shaft to move through. The lower end of the eccentric shaft is rotatably inserted into one of the eccentric holes, and the upper end passes through the hinge hole. The upper end is limited by the top cover.

[0017] Furthermore, a limiting post is provided within the housing space. The limiting post is located on one side of the hinge end of the connecting rod and the swing rod, and is used to limit the swing angle of the connecting rod.

[0018] By adopting the above technical solution, this embodiment uses a cam-shaped protrusion. Driven by the rotation of the drive wheel, the protrusion abuts against the spring plate, triggering a corresponding control signal, thereby achieving the reset and braking of the wiper arm. Furthermore, when the spring plate is not under force, its other end rests against the second connecting piece, without prolonged elastic contact, thus reducing the risk of elastic fatigue. During one rotation of the drive wheel, the spring plate only deforms and stores force, separating from the second connecting piece once. After the protrusion separates from the spring plate, the spring plate automatically resets. This structure effectively improves the service life of the spring plate and enhances product reliability. Attached Figure Description

[0019] Figure 1 This is a perspective view of an embodiment of the present utility model;

[0020] Figure 2 This is a perspective view of an embodiment of the present utility model, omitting the wiper arm;

[0021] Figure 3 This is a schematic diagram of the structure of the control component according to an embodiment of the present utility model;

[0022] Figure 4 This is a schematic diagram of the protrusion assembly of the control component according to an embodiment of the present utility model;

[0023] Figure 5 This is a bottom view of the protrusion in an embodiment of the present invention;

[0024] Figure 6 This is a cross-sectional view of a portion of the structure of an embodiment of this utility model;

[0025] Figure 7 This is an exploded view of a portion of the structure of an embodiment of the present utility model;

[0026] Figure 8 This is an exploded view of another part of the structure of an embodiment of the present utility model;

[0027] Figure 9 This is a top view of a partial structure of an embodiment of the present utility model.

[0028] Labeling: Wiper 10, Housing 1, Lower Housing 11, Housing Space 111, Limiting Post 112, Upper Cover 12, Sealing Ring 13, Terminal Block 14, Motor 2, Drive Wheel 3, Rotating Shaft 31, Positioning Plane 311, Slot 312, Eccentric Hole 32, Linkage Mechanism 4, Linkage Rod 41, Hinge Hole 411, Swing Arm 42, Eccentric Shaft 43, Rotating Shaft 5, Wiper Arm 6, Control Component 7, Protrusion 71, Protrusion 711, Positioning Slot 712, Inner Plane 7121, Slot 7122, Spring 72, Connecting Part 721, First Connecting Plate 73, Second Connecting Plate 74, Screw 75, Metal Seat 76, Transmission Component 8, Worm Gear 81, First Stage Transmission Wheel 82, Large Helical Gear 821, Small Spur Gear 822, Second Stage Transmission Wheel 83, Large Spur Gear 831, Small Gear 832, Protective Cover 9. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0030] like Figures 1 to 9 As shown, a windshield wiper 10 of this embodiment includes a housing 1, a motor 2, a drive wheel 3, a linkage mechanism 4, a rotating shaft 5, a wiper arm 6, and a control component 7.

[0031] See Figures 6 to 8 The motor 2 is connected to the drive wheel 3 for transmission. One end of the linkage mechanism 4 is eccentrically hinged to the drive wheel 3, and the other end of the linkage mechanism 4 is connected to one end of the rotating shaft 5. The other end of the rotating shaft 5 is equipped with the wiper arm 6. The motor 2 is used to drive the drive wheel 3 to rotate. The rotation of the drive wheel 3 drives the linkage mechanism 4 to move. The movement of the linkage mechanism 4 causes the rotating shaft 5 to rotate, causing the wiper arm 6 (illustrated in the figure) to swing.

[0032] And such Figure 3 and Figure 4 As shown, the control component 7 includes a protrusion 71, a spring 72, a first connecting piece 73, and a second connecting piece 74; the protrusion 71 is synchronously mounted on the end of the shaft 31 of the drive wheel 3. The protrusion 71 is cam-shaped and has a radially protruding protrusion 711; the spring 72 is disposed on one side of the end of the shaft 31 and its middle part can be close to the shaft 31. One end of the spring 72 is connected to and fixed to the first connecting piece 73, and the other end of the spring 72 is in contact with the second connecting piece 74.

[0033] When the protrusion 711 of the protrusion 711 abuts against the spring piece 72 as the shaft 31 rotates, the spring piece 72 is deformed by pressure, causing its other end to move away from the second connecting piece 74 and disconnecting the electrical connection between the first connecting piece 73 and the second connecting piece 74; when the protrusion 711 of the protrusion 71 moves away from the spring piece 72, the other end of the spring piece 72 returns to its original position and abuts against the second connecting piece 74, making the first connecting piece 73 and the second connecting piece 74 electrically connected; the first connecting piece 73 and the second connecting piece 74 are disposed between the connection lines of the motor 2 and the power supply (not shown).

[0034] Therefore, in this embodiment, by setting a cam-shaped protrusion 71, when the motor 2 is energized and drives the drive wheel 3 to rotate, the drive wheel 3 can not only drive the wiper arm 6 to move through the linkage mechanism 4, but also drive the protrusion 71 to rotate through the rotating shaft 31, so that the protrusion 711 can rotate to abut against the spring piece 72. For example, in this embodiment... Figure 3 For example, when the drive wheel 3 rotates 180 degrees, it can drive the wiper arm 6 to swing from left to right for one stroke. At this time, the drive wheel 3 shaft 31 synchronously drives the protrusion 71 to rotate 180 degrees and then abut against the spring piece 72, so that the other end of the spring piece 72 moves away from the second connecting piece 74, thereby disconnecting the first connecting piece 73 and the second connecting piece 74, which generates a control signal. Since the first connecting piece 73 and the second connecting piece 74 are located between the motor 2 and the power supply, the control signal triggers the motor 2 to shut down, which can stop the drive wheel 3, thus achieving the purpose of stopping the wiper arm 6 and stopping the right side.

[0035] Of course, the first connecting piece 73 and the second connecting piece 74 are not directly connected between the motor 2 and the power supply, but are connected to the existing control circuit (the specific control circuit can be referred to in the existing technology). The corresponding control signal only takes effect when the driver actively triggers the stop signal, so as to avoid the wiper arm 6 swinging for one stroke and then cutting off the power to the motor 2. That is, when the driver wants to stop the wiper operation, he presses the control switch or wiper lever to trigger the stop signal. The drive wheel 3 will drive the protrusion 711 of the protrusion 711 to rotate and press against the spring 72 to trigger the control signal. Then the control circuit controls the motor 2 to cut off the power to achieve braking. At the same time, the rotation of the drive wheel 3 also drives the wiper arm 6 to reset.

[0036] Moreover, in this embodiment, when the spring piece 72 is not under force, its other end is in contact with the second connecting piece 74, and there is no long-term elastic abutment, so it is not easy to generate elastic fatigue. During the process of the drive wheel 3 rotating one revolution, the spring piece 72 is only deformed by force and stores force to separate from the second connecting piece 74 once. After the protrusion 711 leaves the spring piece 72, the spring piece 72 automatically resets. This structure can effectively improve the service life of the spring piece 72 and improve the reliability of the product.

[0037] In this embodiment, the housing 1 may also be provided with a wiring terminal 14, which facilitates the connection of the first connecting piece 73 and the second connecting piece 74 to the external control circuit through wires.

[0038] like Figure 4 In this embodiment, the protrusion 71 is detachably installed at the end of the rotating shaft 31; before the drive wheel 3 rotates, the connection line between the protrusion 711 of the protrusion 71 and the axis of the rotating shaft 31 is perpendicular to the spring piece 72, and the protrusion 711 is configured to abut against or move away from the spring piece 72.

[0039] By making the drive wheel 3 detachable, it is possible to switch between left-side and right-side stopping when the wiper arm 6 resets. Specifically, when the protrusion 711 of the protrusion 71 is initially positioned away from the spring 72, the drive wheel 3 needs to rotate 180 degrees to drive the protrusion 711 of the protrusion 711 to abut against the spring 72 and trigger the control signal. That is, when the wiper arm 6 swings from left to right for one stroke, the control signal is triggered, and the wiper arm 6 stops at the right side position. When the protrusion 711 of the protrusion 71 is initially positioned to abut against the spring 72, the drive wheel 3 needs to rotate 360 ​​degrees to drive the protrusion 711 of the protrusion 711 to abut against the spring 72 again and trigger the control signal. That is, when the wiper arm 6 swings from left to right and then from right to left for two strokes, the control signal is triggered, and the wiper arm 6 resets and stops at the left side position.

[0040] For further details, please refer to [link / reference]. Figure 5 In this embodiment, the outer peripheral wall of the end of the rotating shaft 31 has two symmetrically arranged positioning planes 311; the middle part of the protrusion 71 has a positioning hole 712 for the end of the rotating shaft 31 to pass through, and the positioning hole 712 has two inner planes 7121 opposite to the positioning planes 311; the connecting line between the center of the protrusion 711 and the center of the protrusion 71 is perpendicular to the inner planes 7121. The positioning planes 311 and the positioning hole 712 with the inner planes 7121 facilitate the installation and positioning of the protrusion 71 and the rotating shaft 31, and ensure the synchronous rotation of the protrusion 71 and the rotating shaft 31.

[0041] Furthermore, the positioning hole 712 has two spaced-apart, radially protruding locking blocks 7122 between its two inner planes 7121; the outer peripheral wall of the end of the rotating shaft 31 is recessed with a slot 312 into which the locking blocks 7122 can be detachably locked. The engagement of the locking blocks 7122 and the slot 312 improves the efficiency of assembly and disassembly.

[0042] In this embodiment, one end of the spring piece 72 connected to the first connecting piece 73 can be bent to form a connecting portion 721, and the connecting portion 721 is used to connect and fix it to the first connecting piece 73. The connecting portion 721 can improve the elastic force when the spring piece 72 is deformed and reset under force, thereby improving the durability of the spring piece 72.

[0043] For example Figures 6 to 9As shown, in this embodiment, the housing 1 includes a lower shell 11, an upper cover 12, and a sealing ring 13; the lower shell 11 has a housing space 111 inside, the top of the housing space 111 is open, the upper cover 12 is detachably installed at the open, and the waterproof sealing ring 13 is sealed between the upper cover 12 and the lower shell 11; the drive wheel 3 and the linkage mechanism 4 are both installed in the housing space 111.

[0044] The drive wheel 3's shaft 31 extends outward from the housing 1 and is fitted with the protrusion 71. The spring piece 72, the first connecting piece 73, and the second connecting piece 74 can all be installed outside the housing 1 to provide sufficient space for the spring piece 72 to move. Both the first connecting piece 73 and the second connecting piece 74 can be L-shaped and detachably locked to the metal base 76 installed outside the housing 1 by screws 75, thereby facilitating the connection of wires between the metal base 76 and the first connecting piece 73 or the second connecting piece 74.

[0045] In this embodiment, a transmission assembly 8 is installed within the housing space 111 between the motor 2 and the drive wheel 3. The motor 2 drives the transmission assembly 8 to rotate, thereby causing the drive wheel 3 to rotate. The transmission assembly 8 may include a worm gear 81, a primary transmission wheel 82, and a secondary transmission wheel 83. The worm gear 81 is coaxially connected to the power end of the motor 2 and meshes with the large helical gear 821 of the primary transmission wheel 82. The small spur gear 822 of the primary transmission wheel 82 meshes with the large spur gear 831 of the secondary transmission wheel 83, and the small gear 832 of the secondary transmission wheel 83 meshes with the drive wheel 3. This embodiment increases the output torque of the motor 2 through multi-stage gear transmission.

[0046] The motor 2 can be installed on one side of the control component 7, and the motor 2 and the control component 7 can be protected by a protective cover 9.

[0047] In this embodiment, the linkage mechanism 4 includes a connecting rod 41 and a swing rod 42. One end of the connecting rod 41 and the swing rod 42 are hinged to each other. The other end of the connecting rod 41 has a hinge hole 411, and an eccentric shaft 43 passes through the hinge hole 411. The other end of the swing rod 42 is connected to the rotating shaft 5. The drive wheel 3 has two eccentric holes 32 with different eccentric distances on its side near the upper cover 12. The eccentric holes 32 allow the eccentric shaft 43 to move through. The lower end of the eccentric shaft 43 is rotatably inserted into one of the eccentric holes 32, and the upper end passes through the hinge hole 411. The upper end is limited by the upper cover 12.

[0048] By providing two eccentric holes 32 on the drive wheel 3, the eccentric position of the eccentric shaft 43 hinged between the connecting rod 41 and the drive wheel 3 can be adjusted. This adjusts the length of the crank in the four-bar linkage formed by the connecting rod mechanism 4 and the drive wheel 3, thereby adjusting the swing angle of the rotating shaft 5 connected to the swing arm 42 and the wiper arm 6. In this embodiment, the swing angle of the wiper arm 6 is 90° and 110°, which can adapt to the needs of windshields of different sizes. The windshield wiper 10 of this utility model can be applied to the windshields of small boats, as well as to ground vehicles, such as forklifts, construction and agricultural machinery vehicles, where a small, compact, and efficient wiper system is required.

[0049] In this embodiment, the two eccentric holes 32 can be respectively located on both sides of the center of the drive wheel 3.

[0050] like Figure 7 and Figure 8 In this embodiment, a limiting post 112 may also be provided within the housing space 111. The limiting post 112 is located on one side of the hinge end of the connecting rod 41 and the swing rod 42, and is used to limit the swing angle of the connecting rod 41. This can prevent the connecting rod 41 and the swing rod 42 from being out of position during installation, thus preventing the four-bar linkage from moving. The specific position of the limiting post 112 can be adjusted according to the actual swing angle of the wiper arm 6.

[0051] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected by this utility model. It should be noted that for those skilled in the art, equivalent changes and modifications without departing from the principle of this utility model should still fall within the protection scope of this utility model.

[0052] In the description of the embodiments of this application, it should be understood that the indicated orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships commonly used when the product is in use, or the orientations or positional relationships commonly understood by those skilled in the art. These are only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the device or component 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 this application. In the description of this application, "a plurality of" and "several" mean two or more, unless otherwise explicitly specified.

Claims

1. A windshield wiper, comprising a motor, a drive wheel, a linkage mechanism, a rotating shaft, and a wiper arm; the motor is connected to the drive wheel for transmission; one end of the linkage mechanism is eccentrically hinged to the drive wheel, the other end of the linkage mechanism is connected to one end of the rotating shaft, and the wiper arm is mounted on the other end of the rotating shaft; the motor drives the drive wheel to rotate, the rotation of the drive wheel drives the linkage mechanism to move, and the movement of the linkage mechanism, in turn, drives the rotating shaft to rotate, causing the wiper arm to swing; characterized in that: It also includes a control component; the control component includes a protrusion, a spring, a first connecting piece, and a second connecting piece; the protrusion is synchronously mounted on the end of the drive wheel shaft, the protrusion is cam-shaped and has a radially protruding protrusion; the spring is disposed on one side of the end of the shaft, one end of the spring is connected to and fixed to the first connecting piece, and the other end of the spring is in contact with the second connecting piece. When the protrusion of the bump abuts against the spring piece as the shaft rotates, the spring piece is deformed by pressure, causing its other end to move away from the second connecting piece and disconnecting the electrical connection between the first connecting piece and the second connecting piece. When the protrusion of the bump moves away from the spring piece, the other end of the spring piece returns to its original position and abuts against the second connecting piece, making the first connecting piece and the second connecting piece electrically connected. The first connecting piece and the second connecting piece are located between the connection lines of the motor and the power supply.

2. A windshield wiper according to claim 1, characterized in that: The protrusion is detachably installed at the end of the rotating shaft; before the drive wheel rotates, the connection line between the protrusion of the protrusion and the axis of the rotating shaft is perpendicular to the spring piece, and the protrusion is configured to abut against or move away from the spring piece.

3. A windshield wiper according to claim 2, characterized in that: The outer peripheral wall of the end of the shaft has two symmetrically arranged positioning planes; the middle part of the protrusion has a positioning hole for the end of the shaft to pass through, and the positioning hole has two inner planes opposite to the positioning planes; the connecting line between the protrusion and the center of the protrusion is perpendicular to the inner plane.

4. A windshield wiper according to claim 3, characterized in that: The positioning card hole has two spaced-apart, radially protruding card blocks between its two inner planes; the outer peripheral wall of the end of the rotating shaft is recessed with a card groove for the card blocks to be detachably inserted.

5. A windshield wiper according to claim 1, characterized in that: The end of the spring piece that connects to the first connecting piece is bent to form a connecting part, and the connecting part is used to connect and fix it to the first connecting piece.

6. A windshield wiper according to claim 1, characterized in that: It also includes a housing; the drive wheel is installed inside the housing; the end of the drive wheel's shaft extends outward from the housing and the protrusion is installed thereon; the spring piece, the first connecting piece, and the second connecting piece are all installed outside the housing; the first connecting piece and the second connecting piece are both "L" shaped and are detachably locked to a metal base installed outside the housing by screws.

7. A windshield wiper according to claim 1, characterized in that: It also includes a housing; the housing includes a lower shell, an upper cover, and a sealing ring; the lower shell has a housing space with an open top, the upper cover is detachably installed at the open top, and the waterproof sealing ring is sealed between the upper cover and the lower shell; the drive wheel and the linkage mechanism are both installed in the housing space; a transmission component installed in the housing space is provided between the motor and the drive wheel, and the motor drives the transmission component to rotate, thereby causing the drive wheel to rotate.

8. A windshield wiper according to claim 7, characterized in that: The transmission assembly includes a worm gear, a primary transmission wheel, and a secondary transmission wheel; the worm gear is coaxially connected to the power end of the motor and meshes with the large helical gear of the primary transmission wheel, the small spur gear of the primary transmission wheel meshes with the large spur gear of the secondary transmission wheel, and the small gear of the secondary transmission wheel meshes with the drive wheel.

9. A windshield wiper according to claim 7, characterized in that: The linkage mechanism includes a connecting rod and a swing rod. One end of the connecting rod and the swing rod are hinged together. The other end of the connecting rod has a hinge hole through which an eccentric shaft passes. The other end of the swing rod is connected to a rotating shaft. The drive wheel has two eccentric holes with different eccentric distances on its side near the top cover. The eccentric holes allow the eccentric shaft to move through. The lower end of the eccentric shaft is rotatably inserted into one of the eccentric holes, and the upper end passes through the hinge hole. The upper end is limited by the top cover.

10. A windshield wiper according to claim 9, characterized in that: The housing space is provided with a limiting post, which is located on one side of the hinge end of the connecting rod and the swing rod, and is used to limit the swing angle of the connecting rod.

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