CN209870331U - Improved automatic resetting control structure of wiper motor - Google Patents
Improved automatic resetting control structure of wiper motor Download PDFInfo
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- CN209870331U CN209870331U CN201920373405.8U CN201920373405U CN209870331U CN 209870331 U CN209870331 U CN 209870331U CN 201920373405 U CN201920373405 U CN 201920373405U CN 209870331 U CN209870331 U CN 209870331U
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- annular bulge
- contact piece
- wiper motor
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Abstract
The utility model discloses an improved automatic reset control structure of a wiper motor, which comprises a contact piece component arranged on a reduction box body, wherein the contact piece component comprises a fixed contact piece and two movable contact pieces which are in conductive contact with the fixed contact piece by depending on certain pre-pressure in a free state; the end face of the worm wheel is provided with a first annular bulge and a second annular bulge, and the two ends of the first annular bulge and the two ends of the second annular bulge are not connected to form a first contact position and a second contact position respectively; in the rotation process of the worm gear, the first annular bulge and the second annular bulge respectively drive one movable contact piece to be disconnected with the fixed contact piece; at the first and second contact positions, the two movable contacts are respectively in conductive contact with the fixed contacts by certain prepressing force in a free state; and outputting an electric signal to control the running state of the wiper motor. The utility model discloses simple structure, less a board and three contact that reset than current windscreen wiper motor automatic re-setting control structure, the worm wheel no longer need install the return board, has reduced assembly process, has reduced manufacturing cost.
Description
Technical Field
The utility model belongs to car windscreen wiper control system field, in particular to improved generation windscreen wiper motor automatic re-setting control structure.
Background
The automobile front windscreen wiper has the functions that the two wiper arms and the wiper blade are driven by the transmission mechanism to wipe dirt on the windshield, and after the wiper is wiped for a plurality of times, the reset switch is shifted to connect the positive pole of a power supply to the reset position. If the internal reset is not short-circuited, i.e. not in the reset position, the current passes through a diode in the vehicle body controller to the low speed end, so that the motor continues to turn to the reset position without stopping the wiper arm and the wiper blade at any position of the windshield. When the wiper arm and the wiper blade return to the original parking position, the motor stops when the wiper arm and the wiper blade return to the reset position, namely the positive low speed end is grounded and short-circuited, namely the so-called 'generator braking effect'. This is a general principle of an automatic reset system of a wiper blade of an automobile.
As shown in fig. 1-3, in the conventional motor, a motor cover subassembly 3 and a worm wheel subassembly 1 are combined to complete the functions of the motor, such as operation and reset. According to the motor reset working principle, two reset reeds 3-1 and 3-2 are arranged on the motor cover plate sub-assembly 3, are arranged on the same ray of the axis of the worm wheel in parallel and are in contact with the metal reset plate 1-2 of the worm wheel at different positions, so that the aim of controlling the motor to reset is achieved. The existing reset plate is large in size and structure, and because the reset plate is usually made of copper materials, a large amount of copper materials are wasted, and the cost is high.
Chinese utility model patent No. CN202094746U discloses a car windscreen wiper motor speed reduction turbine resets board for this reason, include: the reset plate is attached to the end face of the turbine through the clamping pins, and the size of the area of the reset plate is about 1/10 of the area of the end face of the turbine. As soon as possible, the patent provides a small reset plate turbine, the original reset function of the motor is kept, the copper material of a single part is 5.5 g from 18 g, the material is saved by 70%, and the purposes of reducing the cost and saving raw materials are achieved. But it still requires a return plate made of copper material and the cost is still high.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that not enough and provide an improved generation windscreen wiper motor automatic re-setting control structure who does not need the board that resets that copper material made to above-mentioned prior art exists.
The utility model discloses the technical problem that will solve can realize through following technical scheme:
an improved automatic reset control structure of a wiper motor comprises a contact piece assembly arranged on a reduction box body, wherein the contact piece assembly comprises a fixed contact piece and two movable contact pieces which are in conductive contact with the fixed contact piece under certain pre-pressure in a free state; the worm gear is characterized in that a first annular bulge and a second annular bulge are arranged on the end face of the worm gear, and two ends of the first annular bulge and the second annular bulge are not connected with each other and respectively form a first contact position and a second contact position; the second annular protrusion is located at a circumferential periphery of the first contact location; in the rotation process of the worm gear, the first annular bulge and the second annular bulge respectively drive one movable contact piece to be disconnected with the fixed contact piece; at the first contact position and the second contact position, the two movable contacts are in conductive contact with the fixed contacts respectively under certain pre-pressure in a free state; and outputting an electric signal to control the running state of the wiper motor.
In a preferred embodiment of the present invention, the length of the second annular protrusion is greater than the length of the first contact position, and the length of the first annular protrusion is greater than the length of the second contact position.
Since the technical scheme is used, the utility model discloses simple structure has lacked a board and the three contact that resets than current windscreen wiper motor automatic re-setting control structure, and the worm wheel no longer need install the board that returns, has reduced assembly process, has reduced manufacturing cost. The two contact plates have little abrasion in the running process, and the service life is prolonged.
Drawings
Fig. 1 is a schematic structural diagram of a worm wheel sub-assembly of a conventional motor.
Fig. 2 is a schematic structural diagram of a worm wheel reset plate of a conventional motor.
Fig. 3 is a schematic structural diagram of a conventional motor cover plate sub-assembly.
Fig. 4 is the appearance schematic diagram of the wiper motor of the utility model.
Fig. 5 is a sectional view a-a of fig. 4.
Fig. 6 is a three-dimensional schematic view of a worm gear structure in the wiper motor of the present invention.
Fig. 7 is a front view of the worm gear structure in the wiper motor of the present invention.
Fig. 8 is a schematic structural view of the contact plate assembly of the present invention.
Fig. 9 is a sectional view B-B of fig. 8.
Fig. 10 is a perspective view of the contact assembly of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings and the detailed description.
Referring to fig. 4 to 10, there is shown an improved automatic reset control structure of a wiper motor, including a contact assembly 200 mounted on a reduction gear box 100, the contact assembly 200 including a fixed contact 210 and two movable contacts 220 and 230 having a conductive contact with the fixed contact 210 by a certain pre-pressure in a free state.
The utility model is characterized in that the reset plate is not needed any more, but the end surface of the worm wheel 300 (namely the gear) is provided with a first annular bulge 310 and a second annular bulge 320, and the two ends of the first annular bulge 310 and the second annular bulge 320 are not connected with each other to form a first contact position 330 and a second contact position 340 respectively; the second annular protrusion 320 is located at the circumferential periphery of the first contact location 330; the length of the second annular protrusion 320 is greater than the length of the first contact location 330 and the length of the first annular protrusion 310 is greater than the length of the second contact location 340.
The included angle a of the first contact location 330 and the included angle b of the second annular protrusion 320 may be adjusted as desired. The width W of the first annular protrusion 310 and the second annular protrusion 320 may also need to be adjusted.
During the rotation of the worm wheel 300, the first and second annular protrusions 310 and 320 drive one of the movable contacts 220 and 230 to be disconnected from the fixed contact 210, respectively; in the first contact position 330 and the second contact position 340, the two movable contacts 20 and 230 are respectively in conductive contact with the fixed contact 210 under certain pre-pressure in a free state; and outputting an electric signal to control the running state of the wiper motor.
Claims (2)
1. An improved automatic reset control structure of a wiper motor comprises a contact piece assembly arranged on a reduction box body, wherein the contact piece assembly comprises a fixed contact piece and two movable contact pieces which are in conductive contact with the fixed contact piece under certain pre-pressure in a free state; the worm gear is characterized in that a first annular bulge and a second annular bulge are arranged on the end face of the worm gear, and two ends of the first annular bulge and the second annular bulge are not connected with each other and respectively form a first contact position and a second contact position; the second annular protrusion is located at a circumferential periphery of the first contact location; in the rotation process of the worm gear, the first annular bulge and the second annular bulge respectively drive one movable contact piece to be disconnected with the fixed contact piece; at the first contact position and the second contact position, the two movable contacts are in conductive contact with the fixed contacts respectively under certain pre-pressure in a free state; and outputting an electric signal to control the running state of the wiper motor.
2. The improved wiper motor automatic reset control structure as set forth in claim 1, wherein the length of the second annular protrusion is greater than the length of the first contact position, and the length of the first annular protrusion is greater than the length of the second contact position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920373405.8U CN209870331U (en) | 2019-03-22 | 2019-03-22 | Improved automatic resetting control structure of wiper motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920373405.8U CN209870331U (en) | 2019-03-22 | 2019-03-22 | Improved automatic resetting control structure of wiper motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209870331U true CN209870331U (en) | 2019-12-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920373405.8U Active CN209870331U (en) | 2019-03-22 | 2019-03-22 | Improved automatic resetting control structure of wiper motor |
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| Country | Link |
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| CN (1) | CN209870331U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111409593A (en) * | 2020-04-22 | 2020-07-14 | 安徽胜华波汽车电器有限公司 | Automatic resetting control device for wiper motor |
| CN113978419A (en) * | 2021-11-26 | 2022-01-28 | 湖南联诚轨道装备有限公司 | Brushless driving device of windshield wiper for rail transit vehicle |
-
2019
- 2019-03-22 CN CN201920373405.8U patent/CN209870331U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111409593A (en) * | 2020-04-22 | 2020-07-14 | 安徽胜华波汽车电器有限公司 | Automatic resetting control device for wiper motor |
| CN111409593B (en) * | 2020-04-22 | 2023-06-02 | 安徽胜华波汽车电器有限公司 | Automatic reset control device for wiper motor |
| CN113978419A (en) * | 2021-11-26 | 2022-01-28 | 湖南联诚轨道装备有限公司 | Brushless driving device of windshield wiper for rail transit vehicle |
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