Large-torque direct-drive wiper motor

Abstract

The utility model discloses a large-torque direct-drive wiper motor, which is characterized in that a partition plate is arranged in a shell to form a gear cavity and a control cavity, and an input motor connected to the gear cavity and a planetary gear set positioned in the gear cavity are further arranged; a motor shaft of the input motor is in transmission connection with an input sun gear of the planetary gear set through the middle transmission mechanism, primary transmission is conducted through the middle transmission mechanism, secondary transmission is conducted through the planetary gear set, and then an output shaft arranged at the output end of the planetary gear set outputs driving force for driving the windscreen wiper to move. The combination of two-stage transmission can achieve large torque output, the planetary gear set achieves two-stage transmission, meanwhile, the axial length of the planetary gear set is small, the overall size of the wiper motor can be further reduced, and the problem that the output torque and size of an existing wiper system are difficult to meet the requirements of large vehicles such as high-speed rails and subways is solved.

Description

Technical Field

[0001] This utility model belongs to the field of wiper motor technology, and in particular relates to a high-torque direct-drive wiper motor. Background Technology

[0002] While existing automotive wiper motor technology can meet the wiper requirements of ordinary cars, it has some limitations. Specifically, these wiper motors have relatively low output torque and are often quite large due to the need for integrated linkage systems to achieve the reciprocating motion of the wiper. This design makes them difficult to adapt to the special requirements of larger vehicles (such as high-speed trains and subways) for their wiper systems.

[0003] In large vehicles such as high-speed trains and subways, the larger window area and limited space at the front of the vehicle make the impact of rain or other debris on visibility more significant. Therefore, a more powerful and reliable windshield wiper system is needed to ensure that the driver can clearly see the road ahead. However, existing wiper motors cannot provide sufficient torque to effectively clear obstacles on large windows, and their large size makes them difficult to install in space-constrained vehicle structures. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a high-torque direct-drive wiper motor to solve the problem that the output torque and size of existing wiper systems are difficult to adapt to the needs of large vehicles such as high-speed trains and subways.

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

[0006] This utility model discloses a high-torque direct-drive wiper motor, comprising:

[0007] case;

[0008] A partition plate is arranged inside the housing and separates the inner cavity of the housing into a gear cavity and a control cavity;

[0009] An input motor is mounted on the housing, and the motor shaft of the input motor extends into the gear cavity;

[0010] An intermediate transmission mechanism, the input end of which is connected to the motor shaft to form a primary transmission;

[0011] A planetary gear set is installed inside the gear 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 two-stage transmission; wherein, the rotation axis of the motor shaft is perpendicular to the rotation axis of the planetary gear set;

[0012] An output shaft is fixedly connected to the output end of the planetary gear set, and at least a portion of the output shaft extends out of the housing; wherein the output shaft is rotatably connected to the partition plate and the housing at both ends of the planetary gear set.

[0013] The high-torque direct-drive wiper motor of this utility model includes an intermediate transmission mechanism comprising 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.

[0014] The high-torque direct-drive wiper motor of this utility model also includes an auxiliary abutment rod, which is located in the gear 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.

[0015] The high-torque direct-drive wiper motor of this utility model includes a planetary gear set that further comprises a gear ring, several planetary gears, and a sun disk.

[0016] The gear ring is fixed to the gear cavity and sleeved on the input sun gear. An annular space is formed between the gear ring and the input sun gear. A plurality of planetary gears are arranged at intervals in the annular space, and each planetary gear meshes with the gear ring and the input sun gear respectively.

[0017] The sun disk is driven and connected to the output shaft, and the relative position of the sun disk and the output shaft is fixed. The sun disk is provided with rotating holes corresponding to each of the planetary gears, and the axial extension of each planetary gear extends into and is rotatably connected to the rotating hole.

[0018] The high-torque direct-drive wiper motor of this utility model has a transmission ratio of 1:55 to 1:65 for the first-stage transmission and a transmission ratio of 1:2 to 1:4 for the second-stage transmission.

[0019] The high-torque direct-drive wiper motor of this utility model has a brushed motor as its input motor.

[0020] The high-torque direct-drive wiper motor of this utility model has an input motor that is a brushless motor, and the detection end of the output shaft passes through the partition plate and extends into the control cavity. The detection end is provided with a detection magnetic ring, and the control board in the control cavity is provided with a detection Hall sensor corresponding to the detection magnetic ring.

[0021] The high-torque direct-drive wiper motor of this utility model has an output reserved protrusion on the housing corresponding to the output shaft, and the output reserved protrusion has a shaft hole for the output shaft to extend out.

[0022] The high-torque direct-drive wiper motor of this utility model has an external interface on the housing, which is electrically connected to the control board inside the control cavity.

[0023] The high-torque direct-drive wiper motor of this utility model has a housing including a gear cavity cover plate and a control cavity cover plate, wherein the gear cavity cover plate and the control cavity cover plate are clamped on both sides of a partition plate.

[0024] Because of the adoption of the above technical solution, this utility model has the following advantages and positive effects compared with the prior art:

[0025] One embodiment of this utility model forms a gear cavity and a control cavity by setting a partition plate inside the housing, and further sets an input motor connected to the gear cavity and a planetary gear set located in the gear cavity. The motor shaft of the input motor and the input sun gear of the planetary gear set are connected by an intermediate transmission mechanism. The intermediate transmission mechanism performs the first stage of transmission, and the planetary gear set performs the second stage of transmission. Then, the output shaft set at the output end of the planetary gear set outputs the driving force to drive the wiper movement. The combination of the two stages of transmission can achieve a large torque output. In addition, while the planetary gear set achieves the second stage of transmission, its axial length is small, which can further reduce the overall volume of the wiper motor. Thus, it solves the problem that the output torque and volume of the existing wiper system are difficult to adapt to the needs of large vehicles such as high-speed rail and subway. Attached Figure Description

[0026] Figure 1 This is an overall schematic diagram of the high-torque direct-drive wiper motor of this utility model;

[0027] Figure 2 This is a cross-sectional view of the high-torque direct-drive wiper motor of this utility model;

[0028] Figure 3 This is a schematic diagram of the removal of the gear cavity cover plate in the high-torque direct-drive wiper motor of this utility model;

[0029] Figure 4 This is another cross-sectional view of the high-torque direct-drive wiper motor of this utility model;

[0030] Figure 5 This is a cross-sectional view of the external interface of the high-torque direct-drive wiper motor of this utility model.

[0031] Explanation of reference numerals in the attached drawings: 1. Housing; 101. Gear cavity cover plate; 1011. Output reserved protrusion; 102. Control cavity cover plate; 103. Fastening piece; 2. Input motor; 201. Motor shaft; 202. Worm section; 3. Output shaft; 4. Worm wheel; 5. Auxiliary abutment rod; 6. Gear ring; 7. Planetary gear; 8. Sun disk; 9. Input sun gear; 10. Partition plate; 11. Control plate; 12. Detection magnetic ring; 13. External interface. Detailed Implementation

[0032] The following detailed description, in conjunction with the accompanying drawings and specific embodiments, provides a high-torque direct-drive windshield wiper motor according to this utility model. The advantages and features of this utility model will become clearer from the following description and claims.

[0033] See Figures 1 to 5 In one embodiment, a high-torque direct-drive wiper motor includes a housing 1, a partition plate 10, an input motor 2, an intermediate transmission mechanism, a planetary gear set, and an output shaft 3.

[0034] A partition plate 10 is arranged inside the housing 1, dividing the inner cavity of the housing 1 into a gear cavity and a control cavity, where a control plate 11 can be installed. An input motor 2 is mounted on the housing 1, and the motor shaft 201 of the input motor 2 extends into the gear cavity. The input end of the intermediate transmission mechanism is connected to the motor shaft 201 to form a primary transmission. A planetary gear set is mounted in the gear 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 part of the output shaft 3 extends out of the housing 1 for connecting to an external windshield wiper. The output shaft 3 is located at both ends of the planetary gear set and is rotatably connected to the partition plate 10 and the housing 1, respectively.

[0035] In this embodiment, a partition plate 10 is set inside the housing 1 to form a gear cavity and a control cavity. An input motor 2 connected to the gear cavity and a planetary gear set located inside the gear cavity are further provided. The motor shaft 201 of the input motor 2 is connected to the input sun gear 9 of the planetary gear set through an intermediate transmission mechanism. The intermediate transmission mechanism performs the first stage of transmission, and the planetary gear set performs the second stage of transmission. Then, the output shaft 3 set at the output end of the planetary gear set outputs the driving force to drive the wiper. The combination of the two stages of transmission can achieve a large torque output. In addition, while the planetary gear set achieves the second stage of transmission, its axial length is small, which can further reduce the overall volume of the wiper motor. This solves the problem that the output torque and volume of the existing wiper system are difficult to adapt to the needs of large vehicles such as high-speed rail and subway.

[0036] The specific structure of the high-torque direct-drive wiper motor in this embodiment will be further explained below:

[0037] In this embodiment, the intermediate transmission mechanism may specifically include a worm gear 4 and a worm segment 202 disposed on the motor shaft 201. The worm segment 202 meshes with the worm gear 4 to achieve the first-stage transmission. The worm gear 4 is fixed to the axial extension section of the input sun gear 9 (specifically, it may be an extension block formed on the input sun gear 9 extending toward the partition plate 10), and the rotation axis of the worm gear 4 is collinear with the rotation axis of the input sun gear 9, that is, the worm gear 4 drives the input sun gear 9 to rotate synchronously.

[0038] In this embodiment, the high-torque direct-drive wiper motor may further include an auxiliary abutment rod 5, which is located inside the gear 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, that is, the auxiliary abutment rod 5 abuts against the radial force generated by the primary transmission during meshing.

[0039] In this embodiment, a motor magnetic ring can be provided at the end of the motor shaft 201 away from the rotor, which can then cooperate with the motor Hall sensor to detect the rotation angle of the motor shaft 201.

[0040] In this embodiment, the planetary gear set further includes a gear ring 6, a plurality of planetary gears 7, and a sun disk 8. The gear ring 6 is fixed to the gear cavity and sleeved on the input sun gear 9 (specifically, a plurality of arc-shaped recesses can be provided on the outer surface of the gear ring 6, and corresponding arc-shaped recesses can be provided in the gear 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 gear ring 6 and the gear cavity). An annular space is formed between the gear ring 6 and the input sun gear 9, and a plurality of planetary gears 7 are arranged at intervals in the annular space, and each planetary gear 7 meshes with the gear ring 6 and the input sun gear 9 respectively. The number of planetary gears 7 can specifically 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 input motor 2 can be a brushed motor or a brushless motor, with the latter being smaller in size. To further improve the accuracy of the wiper motor's output angle, the detection end of the output shaft 3 can be configured to pass through the partition plate 10 and extend into the control cavity. A detection magnetic ring 12 is provided on the detection end, and a corresponding Hall sensor is provided on the control board 11 inside the control cavity. That is, by setting magnetic rings and corresponding Hall sensors at two positions on the wiper motor, the combination of the two can make the detection of the rotation angle of the output shaft 3 more accurate, effectively improving the accuracy of wiper position control (especially for brushless motors).

[0044] In this embodiment, the housing 1 is provided with an output reserved protrusion 1011 corresponding to the output shaft 3, and the output reserved protrusion 1011 is provided with a shaft hole for the output shaft 3 to extend out. The output reserved protrusion 1011 can be enlarged in diameter of shaft hole and machined to reduce height according to actual product requirements, thereby adapting to more vehicle models.

[0045] In this embodiment, the housing 1 is provided with an external interface 13, which is electrically connected to the control board 11 inside the control cavity. Specifically, the external interface 13 can be configured with a connector for connecting external cables at one end and multiple pins at the other end to connect to the corresponding interface on the control board 11, thereby separating the pin part to further improve the yield.

[0046] In this embodiment, the housing 1 may specifically include a gear cavity cover plate 101 and a control cavity cover plate 102, which are clamped together on both sides of the partition plate 10. The gear 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.

[0047] 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 large torque direct drive wiper motor characterized by, The utility model relates to a kind of gear box, including: Shell; Partition plate, arranged in the shell and the inner cavity of the shell is divided into gear chamber and control chamber; Input motor, installed in the shell, and the motor shaft of the input motor extends in the gear chamber; Intermediate transmission mechanism, the input end of the intermediate transmission mechanism is drivingly connected with the motor shaft and forms primary transmission; Planetary gear set, installed in the gear chamber, and the input sun gear of the planetary gear set is drivingly connected with the output end of the intermediate transmission mechanism and forms secondary transmission;Wherein, the rotation axis of the motor shaft is perpendicular to the rotation axis of the planetary gear set; Output shaft, fixedly connected to the output end of the planetary gear set, and at least part of the output shaft extends from the shell;Wherein, the output shaft is located at the both ends of the planetary gear set respectively rotatingly connected to the partition plate and the shell.

2. The large torque direct drive wiper motor of claim 1, wherein, The intermediate transmission mechanism includes worm gear and worm segment arranged on the motor shaft, the worm segment is drivingly engaged with the worm gear, the worm gear is fixed to the axial extension segment of the input sun gear, and the rotation axis of the worm gear is collinear with the rotation axis of the input sun gear.

3. The large torque direct drive wiper motor of claim 2, wherein, It further includes an auxiliary abutting rod, which is located in the gear chamber and is installed on the shell or the partition plate;The auxiliary abutting rod is located at one end of the motor shaft away from the rotor, and the auxiliary abutting rod abuts on the side of the motor shaft away from the worm gear.

4. The large torque direct drive wiper motor of claim 1, wherein, The planetary gear set further includes a ring gear, a plurality of planetary gears and a sun disc; The ring gear is fixed to the gear chamber and is sleeved on the input sun gear, an annular space is formed between the ring gear and the input sun gear, a plurality of planetary gears are arranged in the annular space, and each planetary gear is engaged with the ring gear and the input sun gear; The sun disc is drivingly connected to the output shaft, and the relative position of the sun disc and the output shaft is fixed, the sun disc is provided with a rotation hole corresponding to each planetary gear, and the axial extension segment of each planetary gear extends into and is rotatably connected to the rotation hole.

5. The large torque direct drive wiper motor of claim 1, wherein, The transmission ratio of the primary transmission is 1:55 to 1:65, and the transmission ratio of the secondary transmission is 1:2 to 1:

4.

6. The large torque direct drive wiper motor of claim 1, wherein, The input motor is a brush motor.

7. The large torque direct drive wiper motor of claim 1, wherein, The input motor is a brushless motor, a detection end of the output shaft is provided through the partition plate and extends into the control chamber, a detection magnetic ring is provided on the detection end, and a detection Hall sensor corresponding to the detection magnetic ring is provided on a control board in the control chamber.

8. The large torque direct drive wiper motor of claim 1, wherein, An output reserved protrusion corresponding to the output shaft is provided on the shell, and an axle hole for extending the output shaft is provided in the output reserved protrusion.

9. The large torque direct drive wiper motor of claim 1, wherein, An external interface is provided on the shell, and the external interface is electrically connected to the control board in the control chamber.

10. The large torque direct drive wiper motor of claim 1, wherein, The shell includes a gear chamber cover plate and a control chamber cover plate, and the gear chamber cover plate and the control chamber cover plate are clamped on both sides of the partition plate.

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