Automotive wiper motor assembly and automotive wiper

Abstract

The application discloses a kind of vehicle wiper motor assemblies and vehicle wiper, assembly includes: armature M is provided with worm; The protrusion is arranged on the rotating shaft of worm wheel;Reset switch K is fixed in assembly housing, and the protrusion can trigger reset switch K once per revolution of worm wheel;The common end K10 of reset switch K is electrically connected with the reset electrode control end of connector JC, the normally closed end K11 is electrically connected with the first motor control end of connector JC and the first output end E1 of automobile battery E, the normally open end K12 of reset switch K can be electrically connected with the second output end E2 of automobile battery E and the first input end M1 of armature M;The second input end M2 of armature M is electrically connected with the second motor control end of connector JC, and the second motor control end can be electrically connected to the first motor control end of connector JC through automobile controller KZ, or can be electrically connected to the first reset electrode control end of connector JC through automobile controller KZ.The application has the beneficial effects of convenient installation and long service life.

Description

Technical Field

[0001] This invention relates to a windshield wiper motor assembly and a windshield wiper. Background Technology

[0002] The motor assembly of an automotive wiper mainly consists of a housing, armature, gearbox, worm gear, gear, return plate, cover plate, and its spring. Chinese patent (CN117189847A) discloses a processing mold for a motor gear assembly and a return assembly of an automotive wiper. Specifically, it discloses that the return plate and the return plastic plate are integrally injection molded to form the return assembly. The spring contact surface of the return plate and the spring contact surface of the return plastic plate form a seamless and stepless plane. The return assembly is sleeved on the shaft of the gear and fixed to the gear. Chinese patent also discloses a four-contact controlled automotive wiper motor assembly (CN113911068A). Specifically, it discloses that the return electrode plate is annular, the center of the annular shape overlaps with the central axis of the worm gear, and the annular shape is provided with a protrusion and a notch. The protrusion is located outside the annular shape, and the width N of the notch is greater than the width D of the protrusion. It also includes: a first contact CP1, a second contact CP2, a third contact CP3, and a fourth contact CP4, which are fixed close to the periphery of the annular shape. Both of the above patents achieve various wiping functions of the windshield wiper by electrically connecting the spring or contact plate with the return plate. Since the return plate is always rotating during wiping, the return plate and the spring or contact plate are always in friction. This leads to a problem: as the number of frictions increases, the return plate and the spring or contact plate wear down, eventually leading to poor electrical contact or even a circuit break, causing the windshield wiper to fail completely. Summary of the Invention

[0003] To address the above shortcomings, this invention provides a vehicle windshield wiper motor assembly.

[0004] The technical solution of this invention is:

[0005] A motor assembly for automotive wipers includes: a motor assembly body, wherein:

[0006] Component housing;

[0007] Armature M is rotatably fixed to the component housing, and a worm gear is provided on the main shaft of armature M;

[0008] The worm gear is rotatably fixed inside the component housing and meshes with the worm.

[0009] The worm gear shaft is equipped with protrusions;

[0010] A reset switch K is fixed inside the component housing. Each time the worm gear rotates once, the protrusion on the worm gear shaft can trigger the reset switch K once.

[0011] The common terminal K10 of the reset switch K is electrically connected to the return electrode control terminal of the connector JC;

[0012] The normally closed terminal K11 of the reset switch K is electrically connected to the first motor control terminal of the connector JC, and can also be electrically connected to the first output terminal E1 of the car battery E.

[0013] The normally open terminal K12 of the reset switch K can be electrically connected to the second output terminal E2 of the car battery E, and at the same time, it is also electrically connected to the first input terminal M1 of the armature M.

[0014] The second input terminal M2 of the armature M is electrically connected to the second motor control terminal of the connector JC. The second motor control terminal can be electrically connected to the first motor control terminal of the connector JC via the vehicle controller KZ, or the second motor control terminal can be electrically connected to the first return electrode control terminal of the connector JC via the vehicle controller KZ.

[0015] The armature M is a high-speed armature M, the second motor control terminal is a low-speed motor control terminal, and the connector JC is provided with a third motor control terminal. The third motor control terminal is electrically connected to the third input terminal M3 of the armature M. The third motor control terminal is a high-speed motor control terminal, and the third motor control terminal can be electrically connected to the first motor control terminal of the connector JC through the vehicle controller KZ.

[0016] A cam is fixed on the worm gear shaft, and the protrusion is part of the cam.

[0017] The reset switch K is fixed on the carbon brush plate, and the trigger rod K13 of the reset switch K can reach the cam.

[0018] The common terminal K10 of the reset switch K is a reed, the normally closed terminal K11 of the reset switch K is a lower metal plate, and the normally open terminal K12 of the reset switch K is an upper metal plate. One end of the reed, the upper metal plate, and the lower metal plate is fixed to the carbon brush plate and is insulated from each other. The other end of the reed, the upper metal plate, and the lower metal plate is a contact. The reed is electrically connected to the upper metal plate or the lower metal plate through the contact. A trigger rod K13 is fixed to one end of the reed near the contact. The trigger rod K13 extends to reach the cam, thereby triggering the reset switch K.

[0019] The first output terminal E1 of the car battery E is the positive terminal of the battery E, and the second output terminal E2 of the car battery E is the negative terminal of the battery E.

[0020] The trigger rod K13 is L-shaped.

[0021] A windshield wiper includes the aforementioned windshield wiper motor assembly.

[0022] Compared with the prior art, the present invention has the following advantages:

[0023] The existing technology abandoned the structure of using a spring and a return plate for normal frictional electrical connection, which greatly extends the life of the contact electrical contact; the return plate is eliminated, reducing costs.

[0024] This invention has the advantages of simple structure, low cost, convenient installation and long service life. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the internal structure of the automotive wiper motor assembly of the present invention.

[0026] Figure 2 This is a schematic diagram of the installation structure of the reset switch K of the present invention.

[0027] Figure 3 This is the electrical schematic diagram of the single-speed automotive wiper motor assembly of the present invention.

[0028] Figure 4 This is the electrical schematic diagram of the high and low speed armature M automotive wiper motor assembly of the present invention. Detailed Implementation

[0029] The present invention will now be further described with reference to the accompanying drawings:

[0030] like Figure 1 , Figure 2 and Figure 3 As shown, a vehicle wiper motor assembly includes: a motor assembly body, which is provided with:

[0031] Component housing;

[0032] Armature M is rotatably fixed to the component housing, and the main shaft of armature M is provided with a worm gear 93;

[0033] Worm gear 94 is rotatably fixed inside the component housing and meshes with worm 93;

[0034] A protrusion 951 is provided on the shaft 95 of the worm gear 94;

[0035] A reset switch K is fixed inside the component housing. Every time the worm gear 94 rotates once, the protrusion 951 on the worm gear 94 shaft 95 can trigger the reset switch K once.

[0036] The common terminal K10 of the reset switch K is electrically connected to the return electrode control terminal 3 of the connector JC;

[0037] The normally closed terminal K11 of the reset switch K is electrically connected to the first motor control terminal 4 of the connector JC, and can also be electrically connected to the first output terminal E1 of the car battery E.

[0038] The normally open terminal K12 of the reset switch K can be electrically connected to the second output terminal E2 of the car battery E, and at the same time, it is also electrically connected to the first input terminal M1 of the armature M.

[0039] The second input terminal M2 of the armature M is electrically connected to the second motor control terminal 2 of the connector JC. The second motor control terminal 2 can be electrically connected to the first motor control terminal 4 of the connector JC via the vehicle controller KZ, or the second motor control terminal 2 can be electrically connected to the first return electrode control terminal 3 of the connector JC via the vehicle controller KZ.

[0040] It should be noted that the reset switch K can be made from purchased finished components, which can reduce manufacturing costs and extend service life.

[0041] It should also be noted that connector JC is usually electrically connected to the car controller KZ. After receiving the user's wiper command, the car controller KZ can short-circuit the second motor control terminal 2 and the first motor control terminal 4 of connector JC. At this time, the positive current of the first output terminal E1 of the car battery E flows into the negative terminal of the battery E through the first motor control terminal 4, the second motor control terminal 2 of connector JC, and the armature M. The armature M rotates continuously. The oscillation of the wiper is completed by the worm gear 94 output shaft driving the linkage assembly and driving the wiper arm and the wiper arm. This part is the prior art and is omitted in the figure. Please refer to the content mentioned in the background art. Since the first return electrode control terminal 3 of connector JC is floating, whether the reset switch K is activated or not does not affect the rotation of the armature M. When the user's stop wiper command is received... Afterwards, the second motor control terminal 2 and the first return electrode control terminal 3 of connector JC are short-circuited by the vehicle controller KZ, and the second motor control terminal 2 and the first motor control terminal 4 of connector JC are disconnected. If the reset switch K is in the normally closed state, the positive current of battery E flows through the normally closed contact of reset switch K, the first return electrode control terminal 3 of connector JC, the vehicle controller KZ, the second motor control terminal 2 of connector JC, and the armature M to the negative terminal of battery E. The armature M continues to rotate to complete the wiper action of this cycle. When the wiper reaches the return position, the reset switch K is triggered, the normally open contact closes, the armature M is cut off from the power supply of battery E, and the residual current stored in the coil of armature M is released by the circuit formed after the short circuit of reset switch K. The wiper arm stays in the return position, waiting for the next cycle.

[0042] Compared with the prior art, the contacts of the reset switch K are non-frictional, thus greatly extending their lifespan. Although there is frictional wear between the bump 951 and the trigger key of the reset switch K, it does not affect the service life of the circuit contacts.

[0043] This embodiment only applies to single-speed wiper motors.

[0044] Furthermore, such as Figure 4As shown, based on the above single-speed wiper motor embodiment, a dual-speed wiper motor can be adapted. The armature M is a high-speed and low-speed armature M, the second motor control terminal 2 is a low-speed motor control terminal, and the connector JC is provided with a third motor control terminal 1. The third motor control terminal 1 is electrically connected to the third input terminal M3 of the armature M. The third motor control terminal 1 is a high-speed motor control terminal, and the third motor control terminal 1 can be electrically connected to the first motor control terminal 4 of the connector JC through the vehicle controller KZ.

[0045] When the wiper needs to return to its original position, the vehicle controller KZ first disconnects the power supply to the third motor control terminal 1, that is, disconnects the power supply to the high-speed motor, and then switches to the power supply to the second motor control terminal 2, that is, connects the power supply to the low-speed motor. Finally, the residual current stored in the coil in the armature M is short-circuited and released, and the wiper arm stays in the return position, waiting for the next cycle.

[0046] As a preferred option, for ease of installation and maintenance, a cam is fixed on the shaft 95 of the worm gear 94, and the protrusion 951 is part of the cam. The cam rotation triggers the reset switch K, which has the advantages of long service life and easy processing and installation.

[0047] Besides using a pre-made reset switch K, it can also be made in-house, such as... Figure 1 and Figure 3 As shown, the reset switch K is fixed on the carbon brush plate, and the trigger rod K13 of the reset switch K can reach the cam.

[0048] Furthermore, the common terminal K10 of the reset switch K is a reed, the normally closed terminal K11 of the reset switch K is a lower metal plate, and the normally open terminal K12 of the reset switch K is an upper metal plate. One end of the reed, the upper metal plate, and the lower metal plate is fixed to the carbon brush plate and insulated from each other. The other end of the reed, the upper metal plate, and the lower metal plate are contacts. The reed is electrically connected to the upper or lower metal plate through the contacts. A trigger rod K13 is fixed to the end of the reed near the contact. The trigger rod K13 extends to reach the cam, thereby triggering the reset switch K. It should be noted that the length of the trigger rod K1 can be shortened and the diameter of the cam can be increased to reduce the torque of the trigger rod K1.

[0049] As one of the preferred options, the trigger lever K13 is L-shaped.

[0050] Typically, the first output terminal E1 of the car battery E is the positive terminal of the battery E, and the second output terminal E2 of the car battery E is the negative terminal of the battery E.

[0051] A windshield wiper for automobiles, including a windshield wiper motor assembly.

Claims

1. A vehicle wiper motor assembly, comprising: The motor assembly body includes: Component housing; Armature M is rotatably fixed to the component housing, and the main shaft of armature M is provided with a worm gear (93). A worm gear (94) is rotatably fixed inside the component housing, and the worm gear (94) meshes with the worm (93); Its characteristic is that a protrusion (951) is provided on the shaft (95) of the worm gear (94). A reset switch K is fixed inside the component housing. Every time the worm gear (94) rotates once, the protrusion (951) on the shaft (95) of the worm gear (94) can trigger the trigger key of the reset switch K once. The common terminal K10 of the reset switch K is electrically connected to the return electrode control terminal (3) of the connector JC. The normally closed terminal K11 of the reset switch K is electrically connected to the first motor control terminal (4) of the connector JC, and can also be electrically connected to the first output terminal E1 of the car battery E. The normally open terminal K12 of the reset switch K can be electrically connected to the second output terminal E2 of the car battery E, and at the same time, it is also electrically connected to the first input terminal M1 of the armature M. The second input terminal M2 of the armature M is electrically connected to the second motor control terminal (2) of the connector JC. The second motor control terminal (2) can be electrically connected to the first motor control terminal (4) of the connector JC via the vehicle controller KZ, or the second motor control terminal (2) can be electrically connected to the return electrode control terminal (3) of the connector JC via the vehicle controller KZ.

2. The automotive wiper motor assembly as described in claim 1, characterized in that, The armature M is a high-speed armature M, the second motor control terminal (2) is a low-speed motor control terminal, the connector JC is provided with a third motor control terminal (1), the third motor control terminal (1) is electrically connected to the third input terminal M3 of the armature M, the third motor control terminal (1) is a high-speed motor control terminal, and the third motor control terminal (1) can be electrically connected to the first motor control terminal (4) of the connector JC through the car controller KZ.

3. A vehicle wiper motor assembly as described in claim 1 or 2, characterized in that, A cam is fixed on the shaft (95) of the worm gear (94), and the protrusion (951) is part of the cam.

4. The automotive wiper motor assembly as described in claim 3, characterized in that, The reset switch K is fixed on the carbon brush plate, and the trigger rod K13 of the reset switch K can touch the cam.

5. A vehicle wiper motor assembly as described in claim 4, characterized in that, The common terminal K10 of the reset switch K is a spring, the normally closed terminal K11 of the reset switch K is a lower metal plate, and the normally open terminal K12 of the reset switch K is an upper metal plate. One end of the spring, the upper metal plate, and the lower metal plate is fixed to the carbon brush plate and is insulated from each other. The other end of the spring, the upper metal plate, and the lower metal plate is a contact. The spring is electrically connected to the upper metal plate or the lower metal plate through the contact. A trigger rod K13 is fixed to the end of the spring near the contact. The trigger rod K13 extends to reach the cam, thereby triggering the reset switch K.

6. A vehicle wiper motor assembly as described in claim 1 or 2, characterized in that, The first output terminal E1 of the car battery E is the positive terminal of the battery E, and the second output terminal E2 of the car battery E is the negative terminal of the battery E.

7. The automotive wiper motor assembly as described in claim 5, characterized in that, The trigger rod K13 is L-shaped.

8. A windshield wiper for automobiles, characterized in that, Includes the automotive wiper motor assembly as described in any one of claims 1-7.

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