Anti-falling type wiper linkage mechanism

Abstract

The utility model discloses an anti-falling type wiper linkage mechanism which comprises a swing arm shaft, a swing arm, a ball head, a ball bowl and a connecting rod, a cylinder is arranged at the top of the ball head, an annular groove is formed in the position, close to the ball head, of the cylinder, an elastic check ring for a shaft is arranged in the annular groove, and the elastic check ring for the shaft is connected with the swing arm shaft. And a flat washer is arranged on the cylinder and between the circlip for the shaft and the ball head. The cylinder is arranged, the flat washer is tightly pressed on the ball head through the axial elastic washer, and even if the ball bowl is abraded excessively, the ball bowl cannot fall off from the flat washer, and the ball bowl is firmly connected with the ball head. And the ball bowl and the ball head cannot be separated and the connecting rod and the swing arm cannot be separated under the condition of overlarge external force, so that the service life of the wiper is prolonged, the safety of an automobile is improved, and the perception quality and satisfaction of customers are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to a wiper (a rain wiper), in particular to a wiper linkage mechanism applied to a vehicle. BACKGROUND

[0002] The wiper of a vehicle (also known as a rain wiper of a vehicle) is one of the key parts for safety of a vehicle, which is mainly composed of a wiper motor, a linkage mechanism, a wiper arm and a wiper blade. The linkage mechanism is used to transmit the torque of the wiper motor to the wiper arm and the wiper blade through the linkage mechanism, and to convert the rotation of the wiper motor into a swing motion so as to clean the glass by the wiper blade. The linkage mechanism includes an arm shaft, an arm, a ball head, a ball bowl and a linkage. The arm of the linkage mechanism is coupled to the linkage through the ball head and the ball bowl. One end of the arm is riveted to the ball head made of metal material, and one end of the linkage is connected to the ball bowl made of plastic material. The arm and the linkage are connected by interference through the combination of the ball head and the ball bowl, and the ball head and the ball bowl have a certain angle of relative rotation. Thus, the wiper can operate normally to clean the glass.

[0003] At present, the ball head and the ball bowl are only restricted by the combined spherical body. The ball bowl surrounds the ball head in a semi-enclosed manner. The minimum inner diameter of the limiting clamping port of the ball bowl and the maximum outer diameter of the ball head only differ by less than 1 mm. Long-term relative rotation of the two will cause wear, so that the inner diameter of the ball bowl becomes larger and the outer diameter of the ball head becomes smaller. As a result, the inner diameter of the limiting clamping port of the ball bowl is larger than the maximum outer diameter of the ball head. If there is a sudden excessive external force, the ball bowl is easy to be detached from the ball head, the linkage and the arm are disconnected, the wiper function is lost, and the safety of the vehicle is seriously affected. SUMMARY

[0004] The purpose of the present application is to solve the problems existing in the prior art, and to provide a wiper linkage mechanism capable of effectively preventing the ball bowl and the ball head from being detached and having good safety.

[0005] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme: a wiper linkage mechanism, which comprises an arm shaft, an arm, a ball head, a ball bowl and a linkage. A cylindrical body is arranged on the top of the ball head. An annular groove is arranged on the cylindrical body and close to the ball head. An elastic shaft ring is arranged in the annular groove. A flat washer is arranged on the cylindrical body and between the elastic shaft ring and the ball head.

[0006] The flat washer and the elastic shaft ring are in close contact with each other. The outer diameter of the flat washer is larger than the inner diameter of the limiting clamping port of the ball bowl, and the outer diameter of the flat washer is smaller than the outer diameter of the ball bowl. The top of the ball bowl is provided with a groove so that the flat washer is in the groove, so that the ball bowl and the ball head are more difficult to be detached. The ball bowl and the linkage are integrally injection molded.

[0007] By adopting the structure of the present application, the flat washer is tightly pressed on the ball head by the cylindrical body and the axial elastic washer, the outer diameter of the flat washer is larger than the inner diameter of the limiting clamping port of the ball bowl, even if the ball bowl is worn too much, the ball bowl cannot fall off from the flat washer, and the ball bowl is connected firmly with the ball head. If the external force is too large, the ball bowl and the ball head will not be separated, and the connecting rod and the swing arm will not be separated, thereby improving the service life of the wiper and the safety of the automobile, and improving the perceived quality and satisfaction of the customer. BRIEF DESCRIPTION OF DRAWINGS

[0008] Figure 1 Figure 1 is a structural schematic diagram of the anti-falling wiper linkage mechanism of the present application. DETAILED DESCRIPTION

[0009] The present application will be further described in detail below in combination with the drawings and specific embodiments.

[0010] Reference Figure 1 It can be seen that the anti-falling wiper linkage mechanism of the present application comprises a swing arm shaft 7, a swing arm 6, a ball head 4, a ball bowl 3, and a connecting rod 5. A cylindrical body 8 is arranged on the top of the ball head 3, an annular groove 81 is arranged on the cylindrical body 8 and close to the ball head, an axial elastic retainer ring 1 is arranged in the annular groove 81 (i.e. the axial elastic retainer ring 1 is sleeved on the cylindrical body 8 through the annular groove 81), and a flat washer 2 is arranged on the cylindrical body 8 and between the axial elastic retainer ring 1 and the ball head 4. One end of the swing arm 6 is riveted with the ball head 4 made of metal material, one end of the connecting rod 5 is connected with the ball bowl 3 made of plastic material, and the swing arm 6 and the connecting rod 5 are connected by interference through the combination of the ball head 4 and the ball bowl 3.

[0011] The flat washer 2 and the axial elastic retainer ring 1 are tightly close to each other. The outer diameter of the flat washer 2 is larger than the inner diameter of the limiting clamping port of the ball bowl 3, and the outer diameter of the flat washer 2 is smaller than the outer diameter of the ball bowl 3. The top of the ball bowl 3 is provided with a groove 31, so that the flat washer 2 is in the groove 31, and the ball bowl and the ball head are more difficult to separate. The ball bowl 3 and the connecting rod 5 are integrally formed by injection molding, so that the ball head, the ball bowl and the connecting rod are more firmly connected and combined into a connecting rod assembly. The ball head 3 and the cylindrical body 8 are in an integral structure, which is convenient for overall manufacturing. The ball bowl 3 is assembled on the ball head 4 by pressure, forming an interference fit of the spherical body. The ball head 4 is connected with the swing arm 6, the axial elastic retainer ring 1 and the flat washer 2 are assembled on the ball head 4 through the cylindrical body 8, which prevents the connecting rod and the ball bowl from falling off from the ball head 4, thereby effectively solving the problem that the connecting rod assembly of the wiper linkage mechanism is separated due to the excessive external force or the long use time, the ball bowl is worn, and the wiper function is invalid.

Claims

1. A wiper linkage mechanism, comprising a wiper shaft, a wiper arm, a ball head, a ball cup, a connecting rod, characterized in that: A cylindrical body is arranged on the top of the ball head, an annular groove is arranged on the cylindrical body and close to the ball head, an elastic shaft retainer is arranged in the annular groove, and a flat washer is arranged on the cylindrical body and between the elastic shaft retainer and the ball head.

2. The fall-off preventive wiper linkage according to claim 1, characterized by: The flat washer and the elastic shaft retainer are in close contact with each other.

3. The fall-off preventing wiper linkage according to claim 1 or 2, characterized in that: The outer diameter of the flat washer is greater than the inner diameter of the limiting clamping port of the ball bowl, and the outer diameter of the flat washer is smaller than the outer diameter of the ball bowl.

4. The fall-off preventive wiper linkage according to claim 3, characterized in that: The top of the ball bowl is provided with a groove so that the flat washer is in the groove.

5. The fall-off preventing wiper linkage according to claim 1 or 2, characterized in that: The ball bowl and the connecting rod are integrally injection molded.

6. The fall-off preventive wiper linkage according to claim 1 or 2, characterized in that: The ball head and the cylindrical body are integrally formed.

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