Low-noise type windscreen wiper connecting rod buffering device

Abstract

A low-noise type windscreen wiper connecting rod buffering device comprises a swing arm side connecting rod and a crank side connecting rod, an adjustable cylinder is sleeved with the swing arm side connecting rod, an adjustable screw is sleeved with the adjustable cylinder, the other end of the adjustable screw is sleeved with the crank side connecting rod, elastic elements are arranged on the adjustable screw and at the outer end of the adjustable cylinder, and the crank side connecting rod is sleeved with the crank side connecting rod. The elastic element is sequentially connected with the flat washer and the axial elastic check ring. The swing arm side connecting rod is connected with the adjustable cylinder through a left-hand thread, and the adjustable screw rod is connected with the crank side connecting rod through a right-hand thread. The center distance length needed by the swing arm side connecting rod and the crank side connecting rod can be rapidly adjusted, noise and vibration impact generated in the movement process of the windscreen wiper can be effectively reduced, the driving comfort of an automobile is improved, and the perception quality and satisfaction degree of customers are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to a wiper, in particular to a wiper connecting rod buffer device applied to a car. BACKGROUND

[0002] The car wiper is one of the key parts of car safety, which is mainly composed of a wiper motor, a crank assembly, an oscillating arm part, a connecting rod mechanism (device), a wiper arm and a wiper blade. The purpose of the connecting rod mechanism is to transmit the torque of the wiper motor to the wiper arm and wiper blade part through the connecting rod mechanism, and to convert the rotary motion of the wiper motor into a swing motion, so that the wiper blade can wipe the glass to remove the rain and foreign matter on the glass.

[0003] At present, the known connecting rod mechanism is hard connected, and the wiper motor rotation drives the connecting rod mechanism to move, which generates a large impact noise to the entire wiper transmission mechanism. The connecting rod mechanism of the car wiper is a whole stamping metal connecting rod (multiple), which is hard connected. During the wiper motor rotation drives the movement of each connecting rod, the wiper motor cannot gradually increase the torque due to its constant torque characteristics, which causes a large impact noise to the entire wiper transmission mechanism at the moment of wiper motor starting. At the moment of wiper arm reversing, the speed suddenly becomes zero and the acceleration is maximum, which also causes a large impact noise to the entire wiper transmission mechanism. SUMMARY

[0004] The purpose of the present application is to solve the problems existing in the prior art, and to provide a low-noise wiper connecting rod buffer device which can reduce the impact noise caused by the wiper motor starting or wiper arm reversing and is stable in operation.

[0005] In order to achieve the above purpose, the present application adopts the following technical scheme: a low-noise wiper connecting rod buffer device, which comprises an oscillating arm side connecting rod and a crank side connecting rod, a adjustable cylinder is sleeved in the oscillating arm side connecting rod, a adjustable screw is sleeved in the adjustable cylinder, the other end of the adjustable screw is sleeved in the crank side connecting rod, an elastic element is arranged on the adjustable screw and at the outer end of the adjustable cylinder, and the elastic element is sequentially connected with a flat washer and an axial elastic stop washer.

[0006] The oscillating arm side connecting rod and the adjustable cylinder are connected by left-hand thread, the adjustable screw and the crank side connecting rod are connected by right-hand thread, a left-hand locking nut is arranged on the adjustable cylinder and adjacent to the oscillating arm side connecting rod, and a right-hand locking nut is arranged on the adjustable screw and adjacent to the crank side connecting rod. The elastic element is a compression spring. The elastic element is an elastic wave-shaped washer.

[0007] By adopting the structure of this invention, the original integrally stamped metal linkage mechanism is divided into two parts: the swing arm side linkage (located on the main swing arm side or the auxiliary swing arm side) and the crank side linkage. Adjustment is achieved through a left-hand thread in the swing arm side linkage and a right-hand thread in the crank side linkage using an adjustable cylinder and an adjustable screw. This facilitates quick adjustment of the required center distance between the swing arm side linkage and the crank side linkage. The buffering connection between the adjustable cylinder and the adjustable screw is achieved through the assembly of an elastic element, a flat washer, and an axial elastic retainer, effectively reducing noise and vibration impact generated by the wipers during operation, improving driving comfort, and enhancing customer perceived quality and satisfaction. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the structure of the low-noise wiper linkage buffer device of the present invention.

[0009] Figure 2 This is a partial schematic diagram of the installation structure of the present invention applied to an automotive windshield wiper. Detailed Implementation

[0010] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0011] Reference Figure 1 , Figure 2 As can be seen, the low-noise wiper linkage buffer device of the present invention includes a swing arm side linkage 7 (connected to the main swing arm component 6 or the auxiliary swing arm component 4) and a crank side linkage 15 (connected to the crank assembly component 2). An adjustable cylinder 8 is fitted inside the swing arm side linkage 7, and an adjustable screw 9 is fitted inside the adjustable cylinder 8. The other end of the adjustable screw 9 is fitted inside the crank side linkage 15. An elastic element 11 is installed on the adjustable screw 9 and at the outer end of the adjustable cylinder 8. The elastic element 11 is connected in sequence to a flat washer 12 and an axial elastic retaining ring 13. That is, one end (left end, without thread) of the adjustable screw 9 is fitted inside the adjustable cylinder 8, and the other end (right end, with a right-hand thread) is fitted inside the crank side linkage 15.

[0012] The swing arm side connecting rod 7 and the adjustable cylinder 8 are connected by a left-hand thread (or a right-hand thread), and the adjustable screw 9 and the crank side connecting rod 15 are connected by a right-hand thread (or a left-hand thread). A left-hand locking nut 10 is installed on the adjustable cylinder 8 and is adjacent to the swing arm side connecting rod 7 (these nuts are locked together after the adjustable screw is adjusted to the correct position). A right-hand locking nut 14 is installed on the adjustable screw 9 and is adjacent to the crank side connecting rod 15 (these nuts are locked together after the adjustable screw is adjusted to the correct position). The elastic element 11 is a compression spring. The elastic element 11 is an elastic wave washer.

[0013] like Figure 2As shown, the car windshield wiper mainly consists of a motor assembly 1, a crank assembly 2, a main swing arm assembly 6, a secondary swing arm assembly 4, and main and secondary wiper arms and blades. The motor assembly 1 generates power to drive the crank assembly 2 in a circular rotation. This power is then transmitted to the main swing arm assembly 6 and the secondary swing arm assembly 4 via connecting rod mechanisms (swing arm side connecting rod 7, crank side connecting rod 15, etc.), causing the main and secondary swing arms to swing left and right accordingly. This, in turn, drives the main and secondary wiper arms and blades to clean rainwater and dirt from the car windshield. The low-noise wiper linkage buffer device 16 of this invention is installed between the main swing arm assembly 6 and the crank assembly 2, and between the crank assembly 2 and the secondary swing arm assembly 4. It should be noted that the swing arm side connecting rod 7 (which can be connected to the crank assembly 2) and the crank side connecting rod 15 (which can be connected to the main swing arm component 6 or the auxiliary swing arm component 4) can also be interchanged and assembled, and they are collectively referred to as the connecting rod mechanism.

[0014] The required center distance between the swing arm side connecting rod 7 and the crank side connecting rod 15 can be adjusted by the left-hand thread of the adjustable cylinder 8 and the right-hand thread of the adjustable screw 9 in the swing arm side connecting rod 7, respectively. This facilitates quick adjustment of the required center distance length of the connecting rod mechanism. After the center distance is adjusted to the correct position, it is locked by the left-hand and right-hand locking nuts 10 and 14 to prevent changes in the center distance. The buffer connection between the adjustable cylinder 8 and the adjustable screw 9 is achieved by assembling the elastic element 11 (compression spring or elastic wave washer), the flat washer 12, and the axial elastic retainer 13. The impact force borne by the connecting rod mechanism can be controlled by the elastic element 11 (compression spring or elastic wave washer). Figure 1 The spring shown is partially released to significantly reduce impact noise.

Claims

1. A low-noise wiper linkage buffer device, characterized in that: It includes a swing arm side connecting rod and a crank side connecting rod. An adjustable cylinder is fitted inside the swing arm side connecting rod, and an adjustable screw is fitted inside the adjustable cylinder. The other end of the adjustable screw is fitted inside the crank side connecting rod. An elastic element is installed on the adjustable screw and at the outer end of the adjustable cylinder. The elastic element is connected in sequence to a flat washer and an axial elastic retaining ring.

2. The low-noise wiper linkage buffer device as described in claim 1, characterized in that: The swing arm side connecting rod and the adjustable cylinder are connected by a left-hand thread, and the adjustable screw and the crank side connecting rod are connected by a right-hand thread.

3. The low-noise wiper linkage buffer device as described in claim 2, characterized in that: A left-handed locking nut is mounted on the adjustable cylinder and is adjacent to the rocker arm side connecting rod; a right-handed locking nut is mounted on the adjustable screw and is adjacent to the crank side connecting rod.

4. The low-noise wiper linkage buffer device as described in claim 1 or 2, characterized in that: The elastic element is a compression spring.

5. The low-noise wiper linkage buffer device as described in claim 1 or 2, characterized in that: The elastic element is an elastic waveform washer.

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