Compact same-frequency different-direction double-wiper driving mechanism

Abstract

The invention discloses a compact same-frequency different-direction double-wiper driving mechanism. The compact same-frequency different-direction double-wiper driving mechanism is characterized by comprising a left wiper arm, a right wiper arm, a left wiper arm rotating shaft sleeve, a right wiper arm rotating shaft sleeve, a linkage rocker arm, a linkage rocker arm rotating shaft sleeve, a motor output shaft crank, a crank output shaft and a gear motor, the rotary motion of the motor is converted into the reciprocating motion of the tail end of the rocker arm through the linkage rocker arm, and then the left windshield wiper arm and the right windshield wiper arm are driven to do different-direction and same-frequency reciprocating swing. The linkage rocker arm is simple and compact in structure, the left windshield wiper arm and the right windshield wiper arm are controlled to move in different directions and at the same frequency through only one linkage rocker arm, and power is transmitted between the single motor and the left windshield wiper arm and between the single motor and the right windshield wiper arm. The mechanism has the advantages of being low in manufacturing difficulty, low in assembly precision requirement, small in clearance and high in motion precision, and batch production and large-scale application are facilitated.

Description

Technical Field

[0001] This invention relates to the field of simulation model technology, specifically to a compact dual wiper drive mechanism with the same frequency and opposite direction. Technical Background

[0002] With the improvement of my country's industrial system and the development of the model industry, the functions of dynamic miniature vehicle models are gradually becoming richer. Equipping dynamic miniature vehicle models with automatically operating miniature electric windshield wipers can enhance the dynamic simulation effect of miniature vehicle models and has significant commercial value. Currently, there is no device that meets the above stringent conditions to achieve dynamic simulation of windshield wipers on such miniature vehicle models. This invention is designed to solve this problem and effectively improve the dynamic display effect of these miniature vehicle models.

[0003] Developing an electric windshield wiper that can be used on small-scale vehicle models presents the following challenges. First, the space available for accommodating electric windshield wipers in small-scale vehicle models is extremely limited, and the layout of the device is usually constrained by the appearance of the real-world vehicle prototype being simulated. Furthermore, since the primary simulation objects of these models are real-world railway and highway vehicles, and the width of real-world vehicles and aircraft equipped with windshield wipers is typically 1.4-3.2 meters, with common model scales of 1 / 24, 1 / 35, 1 / 48, 1 / 43, 1 / 64, 1 / 72, 1 / 87, and 1 / 144, the size of the electric windshield wiper's operating mechanism is strictly limited, making it impossible to achieve this by simply scaling down the operating mechanism of real-world railway and highway wipers. Second, the windshields of vehicle models typically have two sets of wipers that need to move in opposite directions but at the same frequency, requiring the electric wipers to have a compact and reliable dual-wiper linkage mechanism. In addition, due to the tiny size of the electric windshield wipers, designing a reasonable structure that reduces manufacturing difficulty and assembly precision requirements while controlling costs is a major challenge. Summary of the Invention

[0004] In view of the problems existing in the prior art, the purpose of this invention is to provide a compact dual wiper drive mechanism with the same frequency and opposite direction.

[0005] Another object of the present invention is to provide an application of a compact, same-frequency, opposite-directional dual wiper drive mechanism.

[0006] To achieve the above objectives, the present invention adopts the technical solution described below.

[0007] A compact, same-frequency, opposite-direction dual wiper drive mechanism is characterized by comprising a left wiper arm, a right wiper arm, a left wiper arm shaft sleeve, a right wiper arm shaft sleeve, a linked rocker arm, a linked rocker arm shaft sleeve, a crank, a crank output shaft, and a geared motor; the left and right wiper arm shaft sleeves are fitted onto the shafts of the left and right wiper arms; the crank is mounted on the output shaft of the geared motor; the crank output shaft is mounted on the crank; the rocker arm shaft sleeve is fitted onto the shaft of the linked rocker arm; the linked rocker arm shaft sleeve is fixed to the housing of the geared motor; the power input end of the linked rocker arm is connected to the crank output shaft via a sliding groove, and the power output end of the linked rocker arm is equipped with a wiper arm guide ring; the end rods of the left and right wiper arms pass through a rectangular slot between the wiper arm guide rod and the output end of the linked rocker arm.

[0008] As a preferred embodiment, the connecting rocker arm shaft sleeve and the geared motor housing are fixed by adhesive bonding, welding, or snap-fit ​​connection.

[0009] As a preferred embodiment, the left and right wiper arms have a pivot located in the middle and a crank located at the end, with a crank rod perpendicular to the center line of the crank at the end.

[0010] As a preferred embodiment, the output end of the linked rocker arm has a rocker arm with a rectangular slot, and the output shaft of the crank is inserted into the rectangular slot.

[0011] As a preferred embodiment, the input end of the linked rocker arm has a rocker arm-cylindrical structure, and the center of each end face of the cylindrical structure has a blind hole.

[0012] As a preferred embodiment, the end of the wiper arm guide ring is inserted into the end face of the cylindrical structure of the output end of the linked rocker arm, and the wiper arm guide ring can rotate about the center line of the cylindrical structure of the output end of the linked rocker arm. When the linked rocker arm moves up and down reciprocally, the wiper arm guide rod deflects under the constraint of the left and right wiper arm crank rods, so that the plane of the rectangular slot formed by the wiper arm guide rod and the cylindrical structure of the output end of the linked rocker arm is always perpendicular to the projection of the left and right wiper arm crank rods on the plane of the end face of the rotating shaft of the linked rocker arm.

[0013] As a preferred embodiment, the left and right wiper arm pivot sleeves are respectively fitted onto the pivots in the middle of the left and right wiper arms with a clearance fit. The left and right wiper arms can rotate around the center line of the sleeves under the constraint of the left and right wiper arm pivot sleeves respectively. The spatial position of the left and right wiper arm pivot sleeves is fixed relative to the geared motor.

[0014] As a preferred embodiment, the output shaft of the geared motor is interference-fitted with the center hole of the crank; the cross-sectional shape of the output shaft of the geared motor is a straight line, a D-shape, a polygon, or a spline; the cross-sectional shape of the center hole of the crank is a straight line, a D-shape, a polygon, or a spline.

[0015] An application of a compact, same-frequency, opposite-directional dual wiper drive mechanism for small-scale vehicle models with scales of 1 / 24, 1 / 35, 1 / 48, 1 / 43, 1 / 64, 1 / 72, 1 / 87, and 1 / 144.

[0016] The principle of the compact, synchronous, opposite-direction dual wiper drive mechanism of the present invention is as follows: The output shaft of the geared motor drives the crank and the crank output shaft to rotate, and the crank output shaft drives the linked rocker arm to reciprocate around the linked rocker arm's rotation axis; the cylindrical structure at the end of the linked rocker arm and the wiper arm guide ring push the rocker arm rod to move up and down, so that the left and right wiper arms reciprocate in opposite directions, synchronously, and at a fixed angle.

[0017] The electric windshield wiper for small-scale miniature vehicle models of the present invention has the following advantages.

[0018] (1) It has a compact structure and small size, and can be placed in the narrow space between the interior parts and windows of a small-scale vehicle model.

[0019] (2) It can drive two sets of wipers to move in opposite directions and at the same frequency at the same time. The transmission chain is short. It can convert the rotational motion of the motor into the reciprocating rotation of the two sets of wipers and realize the synchronous motion of the two sets of wipers by using only one linkage rocker arm.

[0020] (3) It has a rotatable wiper arm guide ring that can adapt to the different spatial plane movements of the cranks at the ends of the two wiper arms, ensuring smooth operation and small clearance and precise movement angle.

[0021] (4) It has a simple structure and low manufacturing difficulty. It can be mass-produced using production methods commonly used in the light industry, such as injection molding and die casting. It has low assembly precision requirements and low cost, which is conducive to mass production and large-scale application. Attached Figure Description

[0022] Figure 1 This is the main view axonometric drawing of the present invention.

[0023] Figure 2 This is a rear-view axonometric drawing of the present invention.

[0024] Figure 3 This is an exploded view of the structure of the present invention.

[0025] Figure 4 This is an assembly diagram of an embodiment of the present invention.

[0026] The symbols in the above figures are explained as follows: 1 - Right wiper arm, 2 - Left wiper arm, 3 - Right wiper arm shaft sleeve, 4 - Left wiper arm shaft sleeve, 5 - Right linked rocker arm shaft sleeve, 6 - Left linked rocker arm shaft sleeve, 7 - Wiper arm guide ring, 8 - Linked rocker arm, 9 - Crank output shaft, 10 - Crank, 11 - Gear motor. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to specific embodiments.

[0028] This embodiment presents a compact dual wiper drive mechanism with the same frequency and opposite direction, comprising the following features: a left wiper arm 2, a right wiper arm 1, a left wiper arm pivot sleeve 4, a right wiper arm pivot sleeve 3, a linked rocker arm 8, a left linked rocker arm pivot sleeve 6, a right linked rocker arm pivot sleeve 8, a crank 10, a crank output shaft 9, and a geared motor 11.

[0029] The left and right wiper arm pivot sleeves are fitted onto the pivots of the left and right wiper arms; the crank is mounted on the output shaft of the geared motor; the crank output shaft is mounted on the crank; the rocker arm pivot sleeve is fitted onto the pivot of the linked rocker arm; the linked rocker arm pivot sleeve is fixed to the housing of the geared motor; the power input end of the linked rocker arm is connected to the crank output shaft through a slide groove, and the power output end of the linked rocker arm is equipped with a wiper arm guide ring; the rocker arm end rods of the left and right wiper arms pass through the rectangular slot between the wiper arm guide rod and the output end of the linked rocker arm.

[0030] When this invention is applied to the windshield of the cab of a 1 / 87 scale train model, the mechanism of this invention can be placed below the instrument panel of the train model cab, so that the two sets of wipers move in opposite directions and at the same frequency, thereby improving the simulation and dynamic viewing effect of the model.

[0031] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention shall be considered equivalent substitutions and shall be included within the protection scope of the present invention.

Claims

1. A compact, same-frequency, opposite-directional dual wiper drive mechanism, characterized in that: It consists of a left wiper arm, a right wiper arm, a left wiper arm shaft sleeve, a right wiper arm shaft sleeve, a linked rocker arm, a linked rocker arm shaft sleeve, a crank, a crank output shaft, and a geared motor. The left and right wiper arm shaft sleeves are fitted onto the shafts of the left and right wiper arms, respectively. The crank is mounted on the output shaft of the geared motor. The crank output shaft is mounted on the crank. The rocker arm shaft sleeve is fitted onto the shaft of the linked rocker arm. The linked rocker arm shaft sleeve is fixed to the housing of the geared motor. The power input end of the linked rocker arm is connected to the crank output shaft via a slide groove, and the power output end of the linked rocker arm is equipped with a wiper arm guide ring. The rocker arm end rods of the left and right wiper arms pass through a rectangular slot between the wiper arm guide rod and the output end of the linked rocker arm.

2. The compact same-frequency, opposite-direction dual wiper drive mechanism according to claim 1, characterized in that: The connecting rocker arm shaft sleeve is fixed to the geared motor housing by adhesive bonding, welding, or snap-fit ​​connection.

3. The compact same-frequency, opposite-direction dual wiper drive mechanism according to claim 1, characterized in that: The left and right wiper arms have a pivot in the middle and a crank at the end, with a crank rod perpendicular to the center line of the crank at the end.

4. A compact, same-frequency, opposite-directional dual wiper drive mechanism according to claim 1, characterized in that: The output end of the linked rocker arm has a rocker arm with a rectangular slot, and the output shaft of the crank is inserted into the rectangular slot.

5. A compact, same-frequency, opposite-direction dual wiper drive mechanism according to claim 1, characterized in that: The input end of the linked rocker arm has a rocker arm-cylindrical structure, and there are blind holes at the center of both ends of the cylindrical structure.

6. A compact, same-frequency, opposite-direction dual wiper drive mechanism according to claim 1, characterized in that: The end of the wiper arm guide ring is inserted into the end face of the cylindrical structure of the output end of the linked rocker arm. The wiper arm guide ring can rotate about the center line of the cylindrical structure of the output end of the linked rocker arm. When the linked rocker arm moves up and down, the wiper arm guide rod deflects under the constraint of the left and right wiper arm crank rods, so that the plane of the rectangular slot formed by the wiper arm guide rod and the cylindrical structure of the output end of the linked rocker arm is always perpendicular to the projection of the left and right wiper arm crank rods on the plane of the end face of the rotating shaft of the linked rocker arm.

7. A compact, same-frequency, opposite-directional dual wiper drive mechanism according to claim 1, characterized in that: The left and right wiper arm pivot sleeves are respectively fitted onto the pivots in the middle of the left and right wiper arms with a clearance fit. The left and right wiper arms can rotate around the center line of the sleeves under the constraint of the left and right wiper arm pivot sleeves respectively. The spatial position of the left and right wiper arm pivot sleeves is fixed relative to the reduction motor.

8. A compact, same-frequency, opposite-directional dual wiper drive mechanism according to claim 1, characterized in that: The output shaft of the geared motor is interference-fitted with the center hole of the crank; the cross-sectional shape of the output shaft of the geared motor is I-shaped, D-shaped, polygonal, and splined; the cross-sectional shape of the center hole of the crank is I-shaped, D-shaped, polygonal, and splined.

9. A compact, same-frequency, opposite-directional dual wiper drive mechanism according to claim 1, characterized in that: The output shaft of the geared motor drives the crank and the crank output shaft to rotate, and the crank output shaft drives the linked rocker arm to reciprocate around the linked rocker arm shaft; the cylindrical structure at the end of the linked rocker arm and the wiper arm guide ring push the rocker arm rod to move up and down, so that the left and right wiper arms reciprocate in opposite directions, synchronously, and at a fixed angle.

10. The application of a compact, same-frequency, opposite-directional dual wiper drive mechanism according to any one of claims 1-9, characterized in that: It is applicable to small-scale vehicle models with scales of 1 / 24, 1 / 35, 1 / 48, 1 / 43, 1 / 64, 1 / 72, 1 / 87 and 1 / 144.

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