A wiper motor with a separate connector

Abstract

This utility model provides a wiper motor with a detachable connector. By providing an installation opening on the housing corresponding to the control cavity, and further providing a detachable connector installed in the installation opening, the detachable connector includes a connector body, several pins, and several metal connecting wires. The insertion surface of the connector body has an extension structure forming a slot. The slot is used to insert an external plug, and the pins are placed in the slot and partially extend into the connector body. The first connecting end of the metal connecting wire extends into the connector body and is electrically connected to the corresponding pin. The second connecting section of the metal connecting wire is used for electrical connection to the control board. This embodiment separates the connector, which was originally designed as an integral part of the housing. The detachable connector, molded separately, significantly reduces its volume compared to molding it together with the housing, effectively improving the yield rate in the production process.

Description

Technical Field

[0001] This utility model belongs to the field of wiper motor technology, and in particular relates to a wiper motor with a detachable connector. Background Technology

[0002] In existing wiper motors, since both the transmission and controller components are housed within the casing, the connector for the controller is often integrally molded with part of the casing. While this design can improve production efficiency and reduce costs to some extent, it also presents several significant problems. In particular, with the advancement of wiper motors, the functions they need to perform are increasing, leading to a rise in the number of pins in the connector. A larger number of pins increases the complexity of the injection molding process and can easily result in a lower yield rate.

[0003] Specifically, one-piece injection molding requires precise alignment of the connector and housing during the injection process to ensure the correct position of the pins and the stability of the electrical connection. However, maintaining this precise alignment becomes more difficult as the number of pins increases, especially in mass production. Even minute deviations can lead to pin misalignment or damage, affecting the overall quality and reliability of the product. Furthermore, multi-pin connectors are more susceptible to stress concentration during injection molding, which can cause cracks or deformation in the plastic material during cooling, further reducing yield. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a wiper motor with a separate connector to solve the problem of low yield caused by the integral molding design of the existing wiper motor connector and housing.

[0005] To solve the above problems, the technical solution of this utility model is as follows:

[0006] This utility model discloses a wiper motor with a detachable connector, comprising a housing, an input motor, a transmission unit, an output shaft, a control board, and a detachable connector;

[0007] The housing contains a control cavity and a transmission cavity, and the housing has a mounting opening corresponding to the control cavity; the input motor is mounted on the housing, and the motor shaft of the input motor extends into the transmission cavity; the transmission part is arranged in the transmission cavity, and the input end of the transmission part is drivenly connected to the motor shaft; the output shaft is rotatably connected to the housing, and the output shaft is drivenly connected to the output end of the transmission part; the control board is mounted in the control cavity;

[0008] The detachable connector includes a connector body, a plurality of pins and a plurality of metal connecting wires. The connector body includes opposing insertion surfaces and inner end surfaces, and the insertion surfaces are provided with an extension structure forming a slot.

[0009] The detachable connector is sealed and installed in the mounting opening; the pins are respectively arranged in the slots and each pin extends into the connector body; the first connecting end of the metal connecting wire extends into the connector body and is electrically connected to the corresponding pin, and the second connecting end of the metal connecting wire is electrically connected to the control board.

[0010] The present invention relates to a wiper motor with a split connector. The inner cavity of the transmission chamber is provided with an annular sealing groove surrounding the mounting opening. The insertion surface is provided with an annular protrusion surrounding the extension structure. The annular protrusion is configured to be inserted into the annular sealing groove and form a sealing filling cavity. The sealing filling cavity is provided with sealing material.

[0011] The wiper motor of this utility model adopts a split connector, and the inner end face is provided with a covering entity that extends in the control cavity and covers at least part of the metal connecting wire.

[0012] The wiper motor of this utility model, which adopts a split connector, also includes a partition plate. The partition plate is arranged inside the housing and separates the inner cavity of the housing into the transmission cavity and the control cavity. The output shaft is rotatably connected to the partition plate.

[0013] The wiper motor of this utility model adopts a split connector, and the transmission part includes an intermediate transmission mechanism and a planetary gear set.

[0014] The input end of the intermediate transmission mechanism is connected to the motor shaft to form a primary transmission; the planetary gear set is installed in the transmission cavity, and the input sun gear of the planetary gear set is connected to the output end of the intermediate transmission mechanism to form a secondary transmission; wherein, the rotation axis of the motor shaft is perpendicular to the rotation axis of the planetary gear set.

[0015] This utility model discloses a wiper motor with a detachable connector. The intermediate transmission mechanism includes a worm gear and a worm segment mounted on the motor shaft. The worm segment meshes with the worm gear for transmission. The worm gear is fixed to the axial extension of the input sun gear, and the rotation axis of the worm gear is collinear with the rotation axis of the input sun gear.

[0016] The wiper motor of this utility model, which adopts a split connector, also includes an auxiliary abutment rod. The auxiliary abutment rod is located in the transmission cavity and installed in the housing or the partition plate. The auxiliary abutment rod is located at the end of the motor shaft away from the rotor, and the auxiliary abutment rod abuts against the side of the motor shaft away from the worm gear.

[0017] The wiper motor of this utility model adopts a split connector, wherein the transmission ratio of the first-stage transmission is 1:55 to 1:65, and the transmission ratio of the second-stage transmission is 1:2 to 1:4.

[0018] The present invention relates to a wiper motor with a split connector. The part of the output shaft that extends into the transmission cavity is an extended shaft section. A detection magnetic ring is provided on the extended shaft section, and a detection Hall sensor corresponding to the detection magnetic ring is provided on the control board.

[0019] The present invention relates to a wiper motor with a detachable connector. The housing includes a transmission cavity cover plate and a control cavity cover plate, which are clamped to both sides of a partition plate.

[0020] Because of the adoption of the above technical solution, this utility model has the following advantages and positive effects compared with the prior art:

[0021] One embodiment of this utility model provides an installation opening on the housing corresponding to the control cavity, and further provides a detachable connector installed in the installation opening. The detachable connector includes a connector body, several pins, and several metal connecting wires. The insertion surface of the connector body is provided with an extension structure forming a slot. The slot is used to insert an external plug, and the pins are placed in the slot and partially extend into the connector body. The first connecting end of the metal connecting wire extends into the connector body and is electrically connected to the corresponding pin. The second connecting section of the metal connecting wire is used to electrically connect to the control board. This embodiment separates the connector, which was originally designed as an integral part of the housing. The detachable connector, molded separately, significantly reduces its volume compared to being molded together with the housing, effectively improving the yield rate in the production process and solving the problem of low yield rate caused by the existing integrated design of wiper motor connectors and housings. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the detachable connector of the wiper motor of this utility model, which uses a detachable connector, connecting to an external plug.

[0023] Figure 2 This is a cross-sectional view of the detachable connector of the wiper motor of this utility model, which uses a detachable connector.

[0024] Figure 3 This is a schematic diagram of the wiper motor of the present invention, which uses a detachable connector.

[0025] Figure 4 This is a schematic diagram of the wiper motor of this utility model with a detachable connector, after removing the transmission cavity cover.

[0026] Explanation of reference numerals in the attached drawings: 1. Housing; 101. Transmission chamber cover; 102. Control chamber cover; 10201. Annular sealing groove; 103. Fastening element; 2. Input motor; 201. Motor shaft; 202. Worm gear section; 3. Output shaft; 4. Worm gear; 5. Auxiliary abutment rod; 6. Gear ring; 7. Planetary gear; 8. Sun disk; 9. Input sun gear; 10. Partition plate; 11. Control board; 12. Detection magnetic ring; 13. Separable plug-in component; 14. Connector body; 1401. Annular protrusion; 1402. Encasing solid; 1403. Extension structure; 15. Pin; 16. Metal connecting wire; 17. External plug. Detailed Implementation

[0027] The following detailed description, in conjunction with the accompanying drawings and specific embodiments, provides a further detailed explanation of a wiper motor employing a detachable connector according to this utility model. The advantages and features of this utility model will become clearer from the following description and claims.

[0028] See Figures 1 to 4 In one embodiment, a wiper motor employing a detachable connector includes a housing 1, an input motor 2, a transmission unit, an output shaft 3, a control board 11, and a detachable connector.

[0029] The housing 1 contains a control cavity and a transmission cavity, and the housing 1 has a mounting opening corresponding to the control cavity. An input motor 2 is mounted on the housing 1, and its motor shaft 201 extends into the transmission cavity. A transmission unit is arranged in the transmission cavity, and its input end is drive-connected to the motor shaft 201. An output shaft 3 is rotatably connected to the housing 1, and its output end is drive-connected to the output end of the transmission unit. A control board 11 is mounted inside the control cavity.

[0030] The detachable connector includes a connector body 14, a plurality of pins 15, and a plurality of metal connecting wires 16. The connector body includes opposing insertion surfaces and inner end faces, and the insertion surfaces are provided with extension structures 1403 forming slots. The detachable connector is sealed and installed in the installation opening (specifically, it can be connected by bolts, adhesive, snap-fit, or other connection methods, which are not specifically limited here). The pins 15 are respectively arranged in the slots, and each pin 15 extends into the connector body 14. The first connecting end of the metal connecting wire 16 extends into the connector body and is electrically connected to the corresponding pin 15, and the second connecting end of the metal connecting wire 16 is electrically connected to the control board 11.

[0031] This embodiment provides an installation opening on the housing 1 corresponding to the control cavity, and further provides a detachable connector installed in the installation opening. The detachable connector includes a connector body 14, several pins 15, and several metal connecting wires 16. The insertion surface of the connector body 14 is provided with an extension structure 1403 forming a slot. The slot is used to insert an external plug 17, and the pins 15 are placed in the slot and partially extend into the connector body 14. The first connecting end of the metal connecting wire 16 extends into the connector body 14 and is electrically connected to the corresponding pin 15. The second connecting section of the metal connecting wire 16 is used to electrically connect to the control board 11. This embodiment separates the connector, which was originally designed as a single piece on the housing 1. The detachable connector, molded separately, has a significantly reduced volume compared to being molded together with the housing 1, effectively improving the yield rate in the production process and solving the problem of low yield rate caused by the existing integrated design of wiper motor connectors and housing 1.

[0032] The specific structure of the wiper motor with a detachable connector in this embodiment will be further explained below:

[0033] In this embodiment, in order to ensure the sealing of the wiper motor housing 1, an annular sealing groove 10201 surrounding the mounting opening may be provided on the inner side of the transmission cavity, and an annular protrusion 1401 surrounding the extension structure 1403 may be provided on the insertion surface of the connector body. The annular protrusion 1401 is configured to be inserted into the annular sealing groove 10201 and form a sealing filling cavity, and a sealing material is provided in the sealing filling cavity.

[0034] In this embodiment, in order to minimize the impact of vibration on the metal connecting wire 16 and cause the connection between its second connecting end and the control board 11 to fail, a covering entity 1402 extending into the control cavity and covering at least part of the metal connecting wire 16 may be provided on the inner end face of the connector body 14. That is, by providing an extended injection-molded part on the connector body 14 to wrap and support part of the metal connecting wire 16, the metal connecting wire 16 can remain as stable as possible when subjected to vibration and impact, thereby improving the overall reliability of the wiper motor.

[0035] In this embodiment, the wiper motor may also include a partition plate 10. The partition plate 10 is arranged inside the housing 1 and separates the inner cavity of the housing 1 into a transmission cavity and a control cavity. The output shaft 3 is rotatably connected to the partition plate 10 to improve the stability of the rotation of the output shaft 3.

[0036] Furthermore, the portion of the output shaft 3 extending into the transmission cavity is an extended shaft section, on which a detection magnetic ring 12 is provided. The control board 11 is equipped with a corresponding Hall sensor for the detection magnetic ring 12. By placing the magnetic ring and corresponding Hall sensor at two locations on the wiper motor (the other location is the motor shaft 201), the combination of these two elements allows for more precise detection of the rotation angle of the output shaft 3, effectively improving the accuracy of wiper position control (especially for brushless motors). Specifically, the detection magnetic ring 12 can be mounted to the output shaft 3 using a sleeve.

[0037] In this embodiment, the transmission unit may specifically include an intermediate transmission mechanism and a planetary gear set. The input end of the intermediate transmission mechanism is connected to the motor shaft 201 to form a primary transmission. The planetary gear set is installed in the transmission cavity, and the input sun gear 9 of the planetary gear set is connected to the output end of the intermediate transmission mechanism to form a secondary transmission. The rotation axis of the motor shaft 201 is perpendicular to the rotation axis of the planetary gear set. The output shaft 3 is fixedly connected to the output end of the planetary gear set, and at least a portion of the output shaft 3 extends out of the housing 1 for connecting to an external windshield wiper.

[0038] Furthermore, the aforementioned intermediate transmission mechanism may specifically include a worm gear 4 and a worm segment 202 mounted on the motor shaft 201. The worm segment 202 meshes with the worm gear 4 to achieve the aforementioned first-stage transmission. The worm gear 4 is fixed to the axially extended section of the input sun gear 9 (specifically, it may be an extension block extending towards the partition plate 10 on the input sun gear 9), and the rotation axis of the worm gear 4 is collinear with the rotation axis of the input sun gear 9, meaning that the worm gear 4 drives the input sun gear 9 to rotate synchronously. Specifically, the end face of the annular extension structure 1403 away from the control cavity may be configured to abut against the worm gear 4, and the aforementioned gasket is provided between the annular extension structure 1403 and the worm gear 4.

[0039] The intermediate transmission mechanism may also include an auxiliary abutment rod 5, which is located inside the transmission cavity and installed on the housing 1 or the partition plate 10. The auxiliary abutment rod 5 is located at the end of the motor shaft 201 away from the rotor, and the auxiliary abutment rod 5 abuts against the side of the motor shaft 201 away from the worm gear 4.

[0040] Specifically, the planetary gear set also includes a ring gear 6, several planetary gears 7, and a sun disk 8. The ring gear 6 is fixed to the transmission cavity and sleeved on the input sun gear 9 (specifically, several arc-shaped recesses can be provided on the outer surface of the ring gear 6, and corresponding arc-shaped recesses can be provided in the transmission cavity. The two recesses cooperate to form a circular or nearly circular recessed groove, in which a pin is provided, thereby realizing the circumferential rotational fixation of the ring gear 6 and the transmission cavity). An annular space is formed between the ring gear 6 and the input sun gear 9. Several planetary gears 7 are arranged at intervals in the annular space, and each planetary gear 7 meshes with the ring gear 6 and the input sun gear 9 respectively. Specifically, the number of planetary gears 7 can be four.

[0041] The sun disk 8 is connected to the output shaft 3, and the relative position of the sun disk 8 and the output shaft 3 is fixed (specifically, this can be achieved by key connection or by setting corresponding recesses and protrusions on the output shaft 3 and the sun disk 8 respectively, so that they can rotate synchronously). The sun disk 8 is provided with rotating holes corresponding to each planetary gear 7, and the axial extension of each planetary gear 7 extends into and is rotatably connected to the rotating hole. When the input sun gear 9 rotates, the planetary gear 7 meshing between the input sun gear 9 and the gear ring 6 moves around the axis of the input sun gear 9, and then the axial extension of the planetary gear 7 transmits power to the sun disk 8, which in turn drives the output shaft 3 to rotate.

[0042] In this embodiment, the transmission ratio of the first-stage transmission is 1:55 to 1:65, and the transmission ratio of the second-stage transmission is 1:2 to 1:4. The combination of the two can achieve a transmission ratio of 1:200.

[0043] In this embodiment, the housing 1 may specifically include a transmission cavity cover plate 101 and a control cavity cover plate 102. The transmission cavity cover plate 101 and the control cavity cover plate 102 are clamped to both sides of the partition plate 10, and the aforementioned mounting opening is provided in the control cavity cover plate 102. The transmission cavity cover plate 101 and the control cavity cover plate 102 may be fixed by bolts or other connection methods, which are not specifically limited here.

[0044] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, if these changes fall within the scope of the claims of the present invention and their equivalents, they shall still fall within the protection scope of the present invention.

Claims

1. A wiper motor employing a split connector, characterized by, Includes housing, input motor, transmission unit, output shaft, control board, and detachable connectors; The housing contains a control cavity and a transmission cavity, and the housing has a mounting opening corresponding to the control cavity; the input motor is mounted on the housing, and the motor shaft of the input motor extends into the transmission cavity; the transmission part is arranged in the transmission cavity, and the input end of the transmission part is drivenly connected to the motor shaft; the output shaft is rotatably connected to the housing, and the output shaft is drivenly connected to the output end of the transmission part; the control board is mounted in the control cavity; The detachable connector includes a connector body, a plurality of pins and a plurality of metal connecting wires. The connector body includes opposing insertion surfaces and inner end surfaces, and the insertion surfaces are provided with an extension structure forming a slot. The detachable connector is sealed and installed in the mounting opening; the pins are respectively arranged in the slots and each pin extends into the connector body; the first connecting end of the metal connecting wire extends into the connector body and is electrically connected to the corresponding pin, and the second connecting end of the metal connecting wire is electrically connected to the control board.

2. The wiper motor employing a breakaway connector as set forth in claim 1, wherein The inner cavity of the transmission cavity is provided with an annular sealing groove surrounding the mounting opening, and the insertion surface is provided with an annular protrusion surrounding the extension structure. The annular protrusion is configured to be inserted into the annular sealing groove and form a sealing filling cavity, and the sealing filling cavity is provided with sealing material.

3. The wiper motor employing a breakaway connector as set forth in claim 1, wherein The inner end face is provided with a covering entity that extends within the control cavity and covers at least a portion of the metal connecting wire.

4. The wiper motor employing a breakaway connector as set forth in claim 1, wherein It also includes a partition plate, which is arranged inside the housing and separates the inner cavity of the housing into the transmission cavity and the control cavity, and the output shaft is rotatably connected to the partition plate.

5. The wiper motor employing a breakaway connector as set forth in claim 4, wherein The transmission unit includes an intermediate transmission mechanism and a planetary gear set; The input end of the intermediate transmission mechanism is connected to the motor shaft to form a primary transmission; the planetary gear set is installed in the transmission cavity, and the input sun gear of the planetary gear set is connected to the output end of the intermediate transmission mechanism to form a secondary transmission; wherein, the rotation axis of the motor shaft is perpendicular to the rotation axis of the planetary gear set.

6. The wiper motor employing a breakaway connector as set forth in claim 5, wherein The intermediate transmission mechanism includes a worm gear and a worm segment mounted on the motor shaft. The worm segment meshes with the worm gear for transmission. The worm gear is fixed to the axial extension of the input sun gear, and the rotation axis of the worm gear is collinear with the rotation axis of the input sun gear.

7. The wiper motor employing a breakaway connector as set forth in claim 6, wherein It also includes an auxiliary abutment rod, which is located in the transmission cavity and installed on the housing or the partition plate; the auxiliary abutment rod is located at the end of the motor shaft away from the rotor, and the auxiliary abutment rod abuts against the side of the motor shaft away from the worm gear.

8. The wiper motor employing a breakaway connector as set forth in claim 5, wherein The transmission ratio of the first-stage transmission is 1:55 to 1:65, and the transmission ratio of the second-stage transmission is 1:2 to 1:

4.

9. The wiper motor employing a breakaway connector as set forth in claim 4, wherein The portion of the output shaft that extends into the transmission cavity is an extended shaft section, and a detection magnetic ring is provided on the extended shaft section. A detection Hall sensor corresponding to the detection magnetic ring is provided on the control board.

10. The wiper motor employing a breakaway connector as set forth in claim 4, wherein The housing includes a transmission chamber cover plate and a control chamber cover plate, which are clamped to both sides of the partition plate.

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