A wiper motor with axial anti-roll-up

Abstract

This invention provides a wiper motor with axial anti-runaway mechanism. A partition plate separating the transmission cavity and control cavity is provided within the housing. The transmission cavity houses the transmission unit and the output shaft. The input motor drives the output shaft to rotate via the transmission unit. The partition plate is configured with a through hole and an annular extension structure extending towards the transmission cavity along the through hole. The output shaft is rotatably connected to this annular extension structure, and the end of the annular extension structure furthest from the control cavity is configured to abut against the output shaft or at least part of the transmission unit. In other words, the partition plate supports the output shaft and the corresponding transmission unit, thus counteracting the axial runaway of the output shaft and solving the problem of axial runaway of the wiper output shaft in existing wiper motors.

Description

Technical Field

[0001] This utility model belongs to the field of wiper motor technology, and in particular relates to a wiper motor with axial anti-roll-up. Background Technology

[0002] To meet the needs of wipers under different working conditions, such as different rainfall and different wind speeds, existing wiper motors need to provide sufficient torque and speed. They usually use a transmission mechanism to increase the transmission ratio, which can effectively convert the high speed and low torque of the motor into low speed and high torque, thereby better driving the wiper blades to work.

[0003] Although the wiper output shaft installed at the output end of the transmission mechanism is fixedly connected to the connected transmission mechanism, when subjected to impact, there is still a situation where the wiper output shaft and the connected transmission mechanism as a whole move axially. This movement will not only affect the normal operation of the wiper blade, but may also lead to increased wear on the motor and transmission mechanism, thereby shortening their service life. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide an axially anti-movement wiper motor to solve the problem of axial movement of the wiper output shaft in existing wiper motors.

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

[0006] This utility model discloses an axially anti-slip wiper motor, comprising:

[0007] Housing, wherein the housing is provided with an output shaft hole;

[0008] A partition plate is arranged inside the housing and separates the inner cavity of the housing into a transmission cavity and a control cavity. The partition plate is provided with a through hole corresponding to the output shaft hole. The partition plate extends toward the transmission cavity at the through hole to form an annular extension structure.

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

[0010] A transmission unit is arranged in the transmission cavity, and the input end of the transmission unit is connected to the motor shaft for transmission.

[0011] An output shaft passes through and is rotatably connected to the output shaft hole and the annular extension structure, and the output shaft is drively connected to the output end of the transmission part;

[0012] The end face of the annular extension structure away from the control cavity is used to abut against the output shaft or at least part of the transmission part in the axial direction.

[0013] The wiper motor with axial anti-slip function of this utility model has an extended shaft section in which the output shaft extends into the transmission cavity, and the extended shaft section is provided with an annular groove.

[0014] It also includes a retaining ring, which is positioned within the annular groove and configured to abut against the partition plate in the axial direction.

[0015] The present invention relates to an axial anti-slip wiper motor, wherein a gasket is provided between the annular extension structure and the output shaft or at least part of the transmission part, and a gasket is provided between the retaining ring and the partition plate.

[0016] The present invention relates to an axial anti-slip wiper motor, wherein the output shaft is slidably connected to the output shaft hole and the annular extension structure via sliding bearings.

[0017] The windshield wiper motor of this invention has a detection magnetic ring on its extended shaft section, and a detection Hall sensor corresponding to the detection magnetic ring is provided on the control board inside the control cavity.

[0018] The windshield wiper motor with axial anti-slip mechanism of this utility model includes an intermediate transmission mechanism and a planetary gear set in its transmission part.

[0019] 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.

[0020] The present invention relates to an axial anti-slip wiper motor, wherein the intermediate transmission mechanism includes a worm gear and a worm segment disposed on the motor shaft, the worm segment meshing with the worm gear, the worm gear being fixed to the axial extension of the input sun gear, and the rotation axis of the worm gear being collinear with the rotation axis of the input sun gear;

[0021] The end face of the annular extension structure away from the control cavity is used to abut against the worm gear.

[0022] The axial anti-slip wiper motor of this utility model further includes an auxiliary abutment rod, which 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.

[0023] The windshield 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.

[0024] The present invention relates to an axial anti-slip wiper motor, wherein the housing includes a transmission cavity cover plate and a control cavity cover plate, the transmission cavity cover plate and the control cavity cover plate being clamped on both sides of a partition plate.

[0025] Because of the adoption of the above technical solution, this utility model has the following advantages and positive effects compared with the prior art:

[0026] One embodiment of this utility model provides a partition plate separating the transmission cavity and the control cavity within the housing. The transmission cavity contains a transmission part and an output shaft. An input motor drives the output shaft to rotate via the transmission part. The partition plate is configured with a through hole and an annular extension structure extending towards the transmission cavity along the through hole. The output shaft is rotatably connected to the annular extension structure, and the end of the annular extension structure away from the control cavity is configured to abut against the output shaft or at least part of the transmission part. In other words, the partition plate supports the output shaft and the corresponding transmission part, thereby counteracting the axial movement of the output shaft and solving the problem of axial movement of the wiper output shaft in existing wiper motors. Attached Figure Description

[0027] Figure 1 This is an overall cross-sectional view of the axial anti-motor wiper motor of this utility model.

[0028] Figure 2 This is a partial cross-sectional view of the axial anti-move wiper motor of this utility model;

[0029] Figure 3 This is an overall schematic diagram of the axial anti-move wiper motor of this utility model;

[0030] Figure 4 This is a schematic diagram of the removal of the transmission cavity cover plate of the axial anti-movement wiper motor of this utility model;

[0031] Explanation of reference numerals in the attached drawings: 1. Housing; 101. Transmission chamber cover; 102. Control chamber cover; 103. Fastening element; 2. Input motor; 201. Motor shaft; 202. Worm gear 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. Annular extension structure; 14. Snap ring; 15. Gasket. Detailed Implementation

[0032] The following detailed description, in conjunction with the accompanying drawings and specific embodiments, provides a further detailed explanation of an axially anti-slip 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 4In one embodiment, an axially anti-slip wiper motor includes a housing 1, a partition plate 10, an input motor 2, a transmission part, and an output shaft 3.

[0034] The housing 1 is provided with an output shaft 3 hole. 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 partition plate 10 is provided with a through hole corresponding to the output shaft 3 hole. The partition plate 10 extends toward the transmission cavity at the through hole to form an annular extension structure 13.

[0035] The input motor 2 is mounted on the housing 1, and the motor shaft 201 of the input motor 2 extends into the transmission cavity. The transmission part is arranged in the transmission cavity, and the input end of the transmission part is connected to the motor shaft 201. The output shaft 3 passes through and is rotatably connected to the output shaft 3 hole and the annular extension structure 13, and the output shaft 3 is connected to the output end of the transmission part.

[0036] The end face of the annular extension structure 13 away from the control cavity is used to abut against the output shaft 3 or at least part of the transmission part in the axial direction. That is, when the output shaft 3 moves axially toward the control cavity, it can be supported by the annular extension structure 13 and the partition plate 10.

[0037] This embodiment solves the problem of axial movement of the wiper output shaft 3 in existing wiper motors by providing a partition plate 10 separating the transmission cavity and the control cavity inside the housing 1. The transmission cavity is provided with a transmission part and an output shaft 3. The input motor 2 drives the output shaft 3 to rotate through the transmission part. The partition plate 10 is configured with a through hole and an annular extension structure 13 extending towards the transmission cavity along the through hole. The output shaft 3 is rotatably connected to the annular extension structure 13. The end of the annular extension structure 13 away from the control cavity is configured to abut against the output shaft 3 or at least part of the transmission part. That is, the partition plate 10 supports the output shaft 3 and the corresponding transmission part to counteract the axial movement of the output shaft 3.

[0038] The specific structure of the axial anti-rollover wiper motor in this embodiment will be further explained below:

[0039] In this embodiment, to further enhance the axial anti-movement capability, the portion of the output shaft 3 extending into the transmission cavity is an extended shaft section, and an annular groove is provided on the extended shaft section. A retaining ring 14 (e.g., a retaining spring) is positioned within the annular groove, and the retaining ring 14 is configured to abut against the partition plate 10 in the axial direction. That is, the retaining ring 14 prevents the output shaft 3 from axially moving away from the control cavity on the other side of the partition plate 10.

[0040] In this embodiment, in order to ensure the smooth rotation of the output shaft 3, a shim 15 is provided between the annular extension structure 13 and the output shaft 3 or at least part of the transmission part. A shim 15 may also be provided between the retaining ring 14 and the partition plate 10. The function of the shim 15 is to avoid the problem of wear or excessive friction caused by direct contact between the aforementioned structures.

[0041] Furthermore, the output shaft 3 is slidably connected to the hole of the output shaft 3 and the annular extension structure 13 via sliding bearings, thereby ensuring smooth rotation.

[0042] In this embodiment, the input motor 2 can be a brushed motor or a brushless motor, with the latter being smaller in size than the former. To further improve the accuracy of the wiper motor's output angle, a detection magnetic ring 12 can be provided on the extended shaft section, 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 locations on the wiper motor (the other location being the motor shaft), the combination of these two elements allows for more precise detection of the output shaft 3's rotation angle, effectively improving the accuracy of wiper position control (especially for brushless motors). Specifically, the detection magnetic ring 12 can be installed onto the output shaft 3 via a sleeve.

[0043] 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.

[0044] 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 13 away from the control cavity may be configured to abut against the worm gear 4, and the aforementioned gasket 15 is provided between the annular extension structure 13 and the worm gear 4.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] In this embodiment, the housing 1 may specifically include a transmission cavity cover plate 101 and a control cavity cover plate 102, which are clamped together on both sides of the partition plate 10. 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.

[0050] 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. An axial anti-walk rain blade motor characterized by, include: Housing, wherein the housing is provided with an output shaft hole; A partition plate is arranged inside the housing and separates the inner cavity of the housing into a transmission cavity and a control cavity. The partition plate is provided with a through hole corresponding to the output shaft hole. The partition plate extends toward the transmission cavity at the through hole to form an annular extension structure. An input motor is mounted on the housing, and the motor shaft of the input motor extends into the transmission cavity; A transmission unit is arranged in the transmission cavity, and the input end of the transmission unit is connected to the motor shaft for transmission. An output shaft passes through and is rotatably connected to the output shaft hole and the annular extension structure, and the output shaft is drively connected to the output end of the transmission part; The end face of the annular extension structure away from the control cavity is used to abut against the output shaft or at least part of the transmission part in the axial direction.

2. The axial anti-channeling wiper motor of claim 1 wherein, The portion of the output shaft that extends into the transmission cavity is an extension shaft section, and the extension shaft section is provided with an annular groove. It also includes a retaining ring, which is positioned within the annular groove and configured to abut against the partition plate in the axial direction.

3. The wiper motor with axial anti-migration as described in claim 2, characterized in that, A gasket is provided between the annular extension structure and the output shaft or at least part of the transmission part, and a gasket is provided between the retaining ring and the partition plate.

4. The wiper motor with axial anti-movement as described in claim 1, characterized in that, The output shaft is slidably connected to the output shaft hole and the annular extension structure via sliding bearings.

5. The axial anti-migration wiper motor as described in claim 2, characterized in that, 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 inside the control cavity.

6. The wiper motor with axial anti-slip function as described in claim 1, characterized in that, 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.

7. The axial anti-migration wiper motor as described in claim 6, characterized in that, 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. The end face of the annular extension structure away from the control cavity is used to abut against the worm gear.

8. The wiper motor with axial anti-slip function as described in claim 7, characterized in that, 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.

9. The wiper motor with axial anti-migration as described in claim 6, characterized in that, 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.

10. The wiper motor with axial anti-movement as described in claim 1, characterized in that, The housing includes a transmission chamber cover plate and a control chamber cover plate, which are clamped to both sides of the partition plate.

Images