Split type windscreen wiper system capable of driving balance

Abstract

The utility model provides a split type windscreen wiper system capable of driving balance, which comprises a windscreen wiper motor, a connecting rod mechanism, a main swing arm, an auxiliary swing arm, a main windscreen wiper arm and main wiper blade assembly and an auxiliary windscreen wiper arm and auxiliary wiper blade assembly, a first end of the main swing arm is connected with the windscreen wiper motor through the connecting rod mechanism, a second end of the main swing arm is fixedly connected with a first shaft, and a second end of the auxiliary swing arm is fixedly connected with a second shaft. The main wiper arm and the main wiper blade assembly are installed on the first shaft, and the first shaft is rotationally connected with a vehicle body. The first end of the auxiliary swing arm is connected with the wiper motor through a connecting rod mechanism, the second end of the auxiliary swing arm is provided with a balance block, the middle of the auxiliary swing arm is fixedly connected with a second shaft, the auxiliary wiper arm and the auxiliary wiper blade assembly are installed on the second shaft, and the second shaft is rotationally connected with a vehicle body. The rotating motion of the wiper motor is converted into the main swing arm to drive the main wiper arm and the main wiper blade assembly to swing around the axis of the first shaft and the auxiliary swing arm to drive the auxiliary wiper arm and the auxiliary wiper blade assembly to swing around the axis of the second shaft through the connecting rod mechanism.

Description

Technical Field

[0001] The utility model relates to the technical field of windshield wipers, and particularly to a split windshield wiper system with driving balance. Background Art

[0002] Automobile windshield wipers are important accessories for automobiles, which can remove rainwater on the windshield and ensure clear driving vision. Automobile windshield wipers usually include a wiper motor, a link mechanism, a main wiper arm and a main wiper blade assembly, and a secondary wiper arm and a secondary wiper blade assembly. The wiper motor drives the driving link mechanism, so that the main wiper arm and the main wiper blade assembly and the secondary wiper arm and the secondary wiper blade assembly reciprocate on the glass surface, thereby realizing the water wiping function. The link mechanism adopts a split structure. Therefore, during processing and installation, split processing, layout and installation are adopted, saving installation space. However, the secondary wiper arm and the secondary wiper blade assembly have the disadvantages of large shaking amount and unstable return position.

[0003] Therefore, how to solve the problems of large shaking amount and unstable return position of the secondary wiper arm and the secondary wiper blade assembly has become an urgent technical problem in this field. Summary of the Utility Model

[0004] To solve the above technical problems, the utility model provides a split windshield wiper system with driving balance, which includes a wiper motor, a link mechanism, a main swing arm, a secondary swing arm, a main wiper arm and a main wiper blade assembly, and a secondary wiper arm and a secondary wiper blade assembly. The first end of the main swing arm is connected to the wiper motor through the link mechanism, the second end of the main swing arm is fixedly connected to a first shaft, the main wiper arm and the main wiper blade assembly are installed on the first shaft, and the first shaft is rotationally connected to the vehicle body; the first end of the secondary swing arm is connected to the wiper motor through the link mechanism, a balance weight is provided at the second end of the secondary swing arm, the middle of the secondary swing arm is fixedly connected to a second shaft, the secondary wiper arm and the secondary wiper blade assembly are installed on the second shaft, and the second shaft is rotationally connected to the vehicle body; the rotational movement of the wiper motor is converted by the link mechanism into the main swing arm driving the main wiper arm and the main wiper blade assembly to swing around the axis of the first shaft, and the secondary swing arm driving the secondary wiper arm and the secondary wiper blade assembly to swing around the axis of the second shaft.

[0005] Preferably, the link mechanism includes a transmission arm, a first link and a second link. The first end of the transmission arm is fixedly connected to the output shaft of the wiper motor, the second end of the transmission arm is hinged to the first end of the first link, the second end of the first link is respectively hinged to the main swing arm and the first end of the second link, and the second end of the second link is hinged to the first end of the secondary swing arm.

[0006] Preferably, the transmission arm is perpendicularly arranged to the output shaft of the wiper motor.

[0007] Preferably, the first shaft is perpendicularly connected to the main swing arm.

[0008] Preferably, the second shaft is perpendicularly connected to the auxiliary swing arm.

[0009] Preferably, the balance weight is integrally provided with the auxiliary swing arm.

[0010] Preferably, the main wiper arm and the main wiper blade assembly include a main wiper arm and a main wiper blade. The first end of the main wiper arm is fixedly connected to the first shaft, and the main wiper blade is mounted at the second end of the main wiper arm.

[0011] Preferably, the main wiper arm is perpendicularly arranged with respect to the first shaft.

[0012] Preferably, the auxiliary wiper arm and the auxiliary wiper blade assembly include an auxiliary wiper arm and an auxiliary wiper blade. The auxiliary wiper arm is fixedly connected to the second shaft, and the auxiliary wiper blade is mounted at the second end of the auxiliary wiper arm.

[0013] Preferably, the auxiliary wiper arm is perpendicularly arranged with respect to the second shaft.

[0014] Compared with the prior art, the technical solution of the embodiment of the present invention has the following beneficial effects:

[0015] By adding a balance weight on the auxiliary swing arm in the present invention, the impact torque of the auxiliary wiper blade of the auxiliary wiper arm and the auxiliary wiper blade assembly becomes smaller, thereby solving the problems such as large shaking amount and unstable return position of the auxiliary wiper arm and the auxiliary wiper blade assembly, and making the shaking amount of the auxiliary wiper arm and the auxiliary wiper blade assembly small and the return position stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 is a schematic structural diagram of a split wiper system with balance provided by an embodiment of the present invention;

[0018] Figure 2 is a schematic structural diagram of a link mechanism provided by an embodiment of the present invention;

[0019] Figure 3 is Figure 2 a cross-sectional view taken along line A-A in

[0020] Figure 4This is the force analysis diagram of the secondary wiper arm and the secondary wiper blade assembly provided by an embodiment of the present utility model. Detailed implementation manners

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0022] The terms "first", "second", "third", "fourth", etc. (if any) in the description and claims of the present utility model and the above-mentioned accompanying drawings are used to distinguish similar objects, and do not necessarily need to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present utility model described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices. The terms "above" and "upper" and any variations thereof are intended to describe a positional relationship and do not represent a direct contact relationship between the described objects.

[0023] As described in the background art, currently, the split-type wiper has the disadvantages that the secondary wiper arm and the secondary wiper blade assembly have a large amount of shaking and unstable return.

[0024] Please refer to Figure 1 and Figure 2, to solve the above technical problems, the present utility model provides a split windshield wiper system with driving balance, including a windshield wiper motor 1, a linkage mechanism 2, a main swing arm 9, a secondary swing arm 5, a main windshield wiper arm and a main wiper blade assembly 4, and a secondary windshield wiper arm and a secondary wiper blade assembly 6. The first end of the main swing arm 9 is connected to the windshield wiper motor 1 through the linkage mechanism 2. The second end of the main swing arm 9 is fixedly connected to a first shaft 3. The main windshield wiper arm and the main wiper blade assembly 4 are installed on the first shaft 3, and the first shaft 3 is rotatably connected to the vehicle body. The first end of the secondary swing arm 5 is connected to the windshield wiper motor 1 through the linkage mechanism 2. A balance weight 8 is provided at the second end of the secondary swing arm 5. The middle part of the secondary swing arm 5 is fixedly connected to a second shaft 7. The secondary windshield wiper arm and the secondary wiper blade assembly 6 are installed on the second shaft 7, and the second shaft 7 is rotatably connected to the vehicle body. The rotational movement of the windshield wiper motor 1 is converted by the linkage mechanism 2 into the main swing arm 9 driving the main windshield wiper arm and the main wiper blade assembly 4 to swing around the axis of the first shaft 3, and the secondary swing arm 5 driving the secondary windshield wiper arm and the secondary wiper blade assembly 6 to swing around the axis of the second shaft 7.

[0025] Please refer to Figure 3 , in the present utility model, the first end of the secondary swing arm 5 is connected to the windshield wiper motor 1 through the linkage mechanism 2. A balance weight 8 is provided at the second end of the secondary swing arm 5. The middle part of the secondary swing arm 5 is fixedly connected to the second shaft 7. The secondary windshield wiper arm and the secondary wiper blade assembly 6 are installed on the second shaft 7, and the second shaft 7 is rotatably connected to the vehicle body. Therefore, the second shaft 7 in the middle of the secondary swing arm 5 is the swing center of the secondary swing arm 5. By adding the balance weight 8 on the secondary swing arm 5, the secondary scraping impact torque M2 of the secondary windshield wiper arm and the secondary wiper blade assembly 6 is < M1. M1 is the secondary scraping impact torque of the secondary windshield wiper arm and the secondary wiper blade assembly 6 when no balance weight 8 is added on the secondary swing arm 5, and M1 = F1 * L1 - f1 * L1; M2 is the secondary scraping impact torque of the secondary windshield wiper arm and the secondary wiper blade assembly 6 after adding the balance weight 8 on the secondary swing arm 5, and M2 = F1 * L1 - (f1 * L1 + F2 * L2); where F1 is the force transmitted to the secondary windshield wiper arm and the secondary wiper blade assembly 6 by the linkage mechanism 2 during the swinging process; f1 is the friction force between the front windshield and the secondary wiper blade. The present utility model reduces the impact force by adding this group of torques of F2 * L2, thereby solving the problems such as large shaking amount and unstable return position of the secondary windshield wiper arm and the secondary wiper blade assembly 6, and making the shaking amount of the secondary windshield wiper arm and the secondary wiper blade assembly 6 small and the return position stable.

[0026] Since the linkage mechanism 2 belongs to the mature technology in this field, the specific structure of the linkage mechanism 2 is not limited in the present utility model and can be set according to actual usage requirements. As an embodiment, the linkage mechanism 2 includes a transmission arm 201, a first connecting rod 202, and a second connecting rod 203. The first end of the transmission arm 201 is fixedly connected to the output shaft of the wiper motor 1, and the wiper motor 1 is mounted on the vehicle body through a motor bracket; the second end of the transmission arm 201 is hinged to the first end of the first connecting rod 202, the second end of the first connecting rod 202 is respectively hinged to the main swing arm 9 and the first end of the second connecting rod 203, and the second end of the second connecting rod 203 is hinged to the first end of the auxiliary swing arm 5.

[0027] Furthermore, the transmission arm 201 is perpendicularly arranged with respect to the output shaft of the wiper motor 1, the first shaft 3 is perpendicularly connected to the main swing arm 9, and the second shaft 7 is perpendicularly connected to the auxiliary swing arm 5.

[0028] The balance weight 8 can be fixedly connected to the auxiliary swing arm 5 or integrally provided with the auxiliary swing arm 5. Please refer to Figure 4 , such as integrally die-cast with the auxiliary swing arm 5, made of Q235, and having a weight of 500 g.

[0029] The main wiper arm and main wiper blade assembly 4 includes a main wiper arm and a main wiper blade. The first end of the main wiper arm is fixedly connected to the first shaft 3, and the main wiper arm is perpendicularly arranged with respect to the first shaft 3. The main wiper blade is mounted at the second end of the main wiper arm. Whether the main wiper blade is rotatably mounted or fixedly mounted at the second end of the main wiper arm is not limited in the present utility model and can be designed according to actual usage requirements.

[0030] The auxiliary wiper arm and auxiliary wiper blade assembly 6 includes an auxiliary wiper arm and an auxiliary wiper blade. The auxiliary wiper arm is fixedly connected to the second shaft 7, and the auxiliary wiper arm is perpendicularly arranged with respect to the second shaft 7. The auxiliary wiper blade is mounted at the second end of the auxiliary wiper arm. Whether the auxiliary wiper blade is rotatably mounted or fixedly mounted at the second end of the auxiliary wiper arm is not limited in the present utility model and can be designed according to actual usage requirements.

[0031] When the wiper motor 1 operates, the output shaft of the wiper motor 1 rotates and drives the transmission arm 201 to rotate. The transmission arm 201 rotates and drives the main swing arm 9 to swing around the axis of the first shaft 3 through the first connecting rod 202, and the main wiper arm and main wiper blade assembly 4 swings around the axis of the first shaft 3 together with the main swing arm 9; meanwhile, the main swing arm 9 swings and drives the second connecting rod 203 to perform a linear reciprocating motion along the arrow shown in the figure, and drives the auxiliary swing arm 5 to swing around the axis of the second shaft 7, and the auxiliary swing arm 5 drives the auxiliary wiper arm and auxiliary wiper blade assembly 6 to rotate around the axis of the second shaft 7 together.

[0032] In the present utility model, by adding a balance weight 8 to the secondary swing arm 5, the secondary scraping impact moment of the secondary wiper arm and the secondary wiper blade assembly 6 is reduced, thereby solving the problems of large shaking amount and unstable return position existing in the secondary wiper arm and the secondary wiper blade assembly 6, and making the shaking amount of the secondary wiper arm and the secondary wiper blade assembly 6 small and the return position stable.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model, rather than limiting them; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A split-type wiper system with balanced driving, characterized in that: The wiper motor comprises a wiper motor, a connecting rod mechanism, a main swing arm, a secondary swing arm, a main wiper arm and a main wiper blade assembly, and a secondary wiper arm and a secondary wiper blade assembly, wherein the first end of the main swing arm is connected to the wiper motor through the connecting rod mechanism, the second end of the main swing arm is fixedly connected to the first shaft, the main wiper arm and the main wiper blade assembly are mounted on the first shaft, and the first shaft is rotatably connected to the vehicle body; the first end of the secondary swing arm is connected to the wiper motor through the connecting rod mechanism, the second end of the secondary swing arm is provided with a balancing block, the middle part of the secondary swing arm is fixedly connected to the second shaft, the secondary wiper arm and the secondary wiper blade assembly are mounted on the second shaft, and the second shaft is rotatably connected to the vehicle body; the rotational motion of the wiper motor is converted into the main swing arm driving the main wiper arm and the main wiper blade assembly to swing around the axis of the first shaft, and the secondary swing arm driving the secondary wiper arm and the secondary wiper blade assembly to swing around the axis of the second shaft through the connecting rod mechanism.

2. The balanced split wiper system according to claim 1, characterized in that: The connecting rod mechanism includes a transmission arm, a first connecting rod and a second connecting rod. The first end of the transmission arm is fixedly connected to the output shaft of the wiper motor, the second end of the transmission arm is hinged to the first end of the first connecting rod, the second end of the first connecting rod is respectively hinged to the first ends of the main swing arm and the second connecting rod, and the second end of the second connecting rod is hinged to the first end of the auxiliary swing arm.

3. The balanced split wiper system according to claim 2, characterized in that: The transmission arm is arranged perpendicularly to the output shaft of the wiper motor.

4. The balanced split wiper system according to claim 1, characterized in that: The first shaft is vertically connected to the main swing arm.

5. The balanced split wiper system according to claim 1, characterized in that: The second shaft is vertically connected to the auxiliary swing arm.

6. The balanced split wiper system according to claim 1, characterized in that: The balancing block is integrally arranged with the auxiliary swing arm.

7. The balanced split wiper system according to claim 1, characterized in that: The main wiper arm and main wiper blade assembly comprises a main wiper arm and a main wiper blade. The first end of the main wiper arm is fixedly connected to the first shaft, and the main wiper blade is installed at the second end of the main wiper arm.

8. The balanced split wiper system according to claim 7, characterized in that: The main wiper arm is arranged perpendicular to the first axis.

9. The balanced split wiper system according to claim 1, characterized in that: The auxiliary wiper arm and auxiliary wiper blade assembly comprises an auxiliary wiper arm and an auxiliary wiper blade. The auxiliary wiper arm is fixedly connected to the second shaft, and the auxiliary wiper blade is installed at the second end of the auxiliary wiper arm.

10. The balanced split wiper system according to claim 9, characterized in that: The auxiliary wiper arm is arranged perpendicular to the second axis.

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