A transmission assembly for a mirror drive

Abstract

The application discloses a transmission assembly of a mirror driver, which comprises a transmission mechanism, the transmission mechanism comprising a motor, a first transmission group, a second transmission group and a third transmission group, the axis B of the motor output shaft being perpendicular to the central axis A around which the arc-shaped rack moves, the central axis C of the first transmission group and the axis E of the third transmission group both being parallel to the central axis A around which the arc-shaped rack moves, and the central axis D of the second transmission group being parallel to the axis B of the motor output shaft; the first transmission group is at least partially located below the motor output shaft, the second transmission group is at least partially located below the first transmission group, and the third transmission group is at least partially located above the second transmission group. The application has the effect of optimizing the transmission layout of the arc-shaped rack and the motor and increasing the overall stability of the mirror driver.

Description

Technical Field

[0001] This application relates to the field of transmission component technology for mirror actuators, and more particularly to a transmission component for a mirror actuator. Background Technology

[0002] Currently, existing mirror angle adjustment mechanisms can adjust the angle and visual range of electric mirrors in passenger cars, providing drivers with the best rear visibility.

[0003] Existing mirror drive components often employ gearbox-type transmissions. However, gearbox-type transmissions rely on the meshing of numerous planetary gears, sun gears, and other types of gears, resulting in low transmission efficiency, noise generation, unstable output power, and low fault tolerance. These problems severely impact driving safety. Therefore, current technology uses two sets of worm gears to convert the motor output direction to a horizontal direction perpendicular to it, thereby achieving the rotation of the arc-shaped rack on the side of the motor.

[0004] However, the use of two sets of worm gears results in a relatively cramped spatial arrangement between the arc rack and the motor, making the arc rack prone to collision with the motor. Furthermore, the transmission component has weak structural rigidity and lacks three-dimensional support, which can cause the worm gears to detach and fail. In some cases, after the mirror actuator is impacted, the space between the arc rack and the motor may deform, causing the mirror actuator to fail. Therefore, there is room for improvement in this design. Utility Model Content

[0005] This application proposes a transmission component for a mirror actuator, which aims to optimize the transmission layout of the arc rack and motor and increase the overall stability of the mirror actuator.

[0006] Specifically, the transmission component of this mirror driver transmits the motor's power to the arc-shaped rack through three sets of vertically staggered transmission groups. At the same time, the three sets of transmission groups stacked in three dimensions support each other, making the transmission components structurally rigid. Furthermore, the design of the three sets of transmission groups keeps the arc-shaped rack away from the motor, ensuring a safe distance between the arc-shaped rack and the motor, making the relationship between the arc-shaped rack and the motor both safe and stable.

[0007] The transmission assembly of the mirror actuator provided in this application adopts the following technical solution: A transmission assembly for a mirror actuator includes a base, a mirror floating plate disposed above the base, an arc-shaped rack, and a transmission mechanism. The upper end of the arc-shaped rack is hinged to the mirror floating plate, and the lower end is mounted on the base. The arc-shaped rack moves around a central axis A and is driven by the transmission mechanism. The transmission mechanism includes a motor, a first transmission group, a second transmission group, and a third transmission group. The axis B of the motor output shaft is perpendicular to the central axis A around which the arc-shaped rack moves. The central axis C of the first transmission group and the axis E of the third transmission group are both parallel to the central axis A around which the arc-shaped rack moves. The central axis D of the second transmission group is parallel to the axis B of the motor output shaft. The first transmission group is at least partially located below the motor output shaft, the second transmission group is at least partially located below the first transmission group, and the third transmission group is at least partially located above the second transmission group.

[0008] By adopting the above technical solution, the rotation of the motor drives the first transmission group below and perpendicular to it. The first transmission group drives the second transmission group below and perpendicular to it. The second transmission group drives the third transmission group above and perpendicular to it. The third transmission group drives the arc rack to rotate, thereby realizing the micro-arc-level angle adjustment of the mirror floating plate. Among them, the orthogonal and perpendicular staggered arrangement of the three transmission groups not only realizes the closed-loop transmission of the motor's power to the arc rack, but also the three-dimensional stacked transmission groups also make the transmission groups support each other three-dimensionally, making the structural rigidity of the transmission component strong. Moreover, the design of the three transmission groups keeps the arc rack away from the motor, so that the arc rack's running trajectory is completely separated from the motor's axial projection area, so that there is a safe distance between the arc rack and the motor. This makes the spatial layout of the arc rack and the motor both safe and stable. Even after the mirror driver is impacted, there is still a buffer space between the arc rack and the motor to ensure the integrity of the mirror driver's driving process.

[0009] Preferably, there are two transmission mechanisms, the motors of the two transmission mechanisms are arranged in parallel, and the first transmission group, the second transmission group and the third transmission group of the two transmission mechanisms are all arranged symmetrically.

[0010] By adopting the above technical solution, through two sets of transmission mechanisms with independent motors, one side of the mirror floating plate can have different rotation angles, thus giving the mirror floating plate a richer range of rotation angles than a single motor. Generally speaking, the arrangement of two motors would put more pressure on the layout of the transmission mechanism inside the mirror driver. However, the design of three sets of transmission groups can make the arc rack running trajectory completely separate from the axial projection area of ​​the motor, which is very suitable for the arrangement of two sets of motors, and there is no need to worry about the motor encroaching on the space of the arc rack.

[0011] Preferably, the first transmission group includes a primary transmission turbine and a secondary transmission worm, wherein the central axes of the primary transmission turbine and the secondary transmission worm are on the same straight line, and the primary transmission turbine and the secondary transmission worm are integrally formed.

[0012] Preferably, the second transmission group includes a two-stage transmission turbine and a three-stage transmission worm, wherein the central axes of the two-stage transmission turbine and the three-stage transmission worm are located on the same straight line, and the two-stage transmission turbine and the three-stage transmission worm are integrally formed.

[0013] Preferably, the third transmission group includes a three-stage transmission turbine and a four-stage transmission worm, wherein the central axes of the three-stage transmission turbine and the four-stage transmission worm are located on the same straight line, and the three-stage transmission turbine and the four-stage transmission worm are integrally formed.

[0014] Preferably, the base has a receiving groove, both ends of the first transmission group and the second transmission group are connected to the receiving groove, and a third rotating frame is provided at the upper end of the receiving groove, and the third transmission group is rotatably engaged with the third rotating frame.

[0015] Preferably, the four-stage transmission worm gear is connected to the arc-shaped rack, the arc-shaped rack includes a bottom arc portion and a side arc portion, the bottom arc portion is provided with a rack for transmission connection with the four-stage transmission worm gear, and the four-stage transmission worm gear is inserted into and slidably connected to the side arc portion.

[0016] Preferably, the motor is fixed to the base by a bracket, there is a gap between the motor and the base, and the two sides of the motor are fan-shaped surfaces and the bottom is a flat surface.

[0017] Preferably, the base is provided with a potentiometer between the two third transmission groups, and a potential gear is fixedly connected to the fourth-stage transmission worm of the third transmission group. The potential gear rotates with the fourth-stage transmission worm, and the detection shaft of the potentiometer meshes with the potential gear.

[0018] In summary, this application includes at least one of the following beneficial technical effects: 1. The rotation of the motor drives the first transmission group below and perpendicular to it. The first transmission group drives the second transmission group below and perpendicular to it. The second transmission group drives the third transmission group above and perpendicular to it. The third transmission group drives the arc rack to rotate, thereby realizing the micro-arc-level angle adjustment of the mirror floating plate. Among them, the orthogonal and perpendicular staggered arrangement of the three transmission groups not only realizes the closed-loop transmission of the motor's power to the arc rack, but also the three-dimensional stacked transmission groups also make the transmission groups support each other three-dimensionally, making the structural rigidity of the transmission component strong. Moreover, the design of the three transmission groups keeps the arc rack away from the motor, so that the arc rack's running trajectory is completely separated from the motor's axial projection area, so that there is a safe distance between the arc rack and the motor. The spatial layout of the arc rack and the motor is both safe and stable. Even after the mirror driver is impacted, there is a buffer space between the arc rack and the motor to ensure the integrity of the mirror driver's driving process. 2. By using two sets of transmission mechanisms with independent motors, one side of the mirror floating plate can have different rotation angles, thus giving the mirror floating plate a wider range of rotation angles than a single motor. Generally speaking, the arrangement of two motors will put more pressure on the layout of the transmission mechanism in the mirror driver. However, the design of three sets of transmission groups can make the running trajectory of the arc rack completely separate from the axial projection area of ​​the motor, which is very suitable for the arrangement of two sets of motors, and there is no need to worry about the motor encroaching on the space of the arc rack. Attached Figure Description

[0019] Figure 1 This is a top view of the transmission mechanism in this embodiment; Figure 2 This is a schematic diagram of the structure of some transmission mechanisms in this embodiment; Figure 3 This is a schematic diagram of the structure of the motor, the first transmission group, and the second transmission group in this embodiment; Figure 4 This is a schematic diagram of the base structure in this embodiment.

[0020] Reference numerals: 1. Base; 11. Receiving groove; 12. First rotating frame; 13. Second rotating frame; 14. Third rotating frame; 2. Arc-shaped rack; 21. Bottom arc portion; 22. Side arc portion; 3. Transmission mechanism; 31. Motor; 311. First-stage transmission worm gear; 32. First transmission group; 321. First-stage transmission turbine; 322. Second-stage transmission worm gear; 33. Second transmission group; 331. Second-stage transmission turbine; 332. Third-stage transmission worm gear; 34. Third transmission group; 341. Third-stage transmission turbine; 342. Fourth-stage transmission worm gear; 343. Potentiometer gear; 4. Support; 5. Potentiometer; 51. Detection gear. Detailed Implementation

[0021] The following is in conjunction with the appendix Figures 1-4This application will be described in further detail.

[0022] This application discloses a transmission component for a mirror driver.

[0023] Reference Figures 1-4 It includes a base 1, a mirror floating plate set above the base 1, an arc-shaped rack 2 and a transmission mechanism 3. The upper end of the arc-shaped rack 2 is hinged to the mirror floating plate, and the lower end is installed on the base 1. The arc-shaped rack 2 moves around the central axis A and is driven by the transmission mechanism 3.

[0024] The transmission mechanism 3 includes a motor 31, a first transmission group 32, a second transmission group 33, and a third transmission group 34. The axis B of the output shaft of the motor 31 is perpendicular to the central axis A around which the arc rack 2 moves. The central axis C of the first transmission group 32 and the axis E of the third transmission group 34 are both parallel to the central axis A around which the arc rack 2 moves. The central axis D of the second transmission group 33 is parallel to the axis B of the output shaft of the motor 31. The axis E of the third transmission group 34 coincides with the central axis A around which the arc rack 2 moves. The first transmission group 32 is at least partially located below the output shaft of the motor 31, the second transmission group 33 is at least partially located below the first transmission group 32, and the third transmission group 34 is at least partially located above the second transmission group 33.

[0025] The base 1 is bowl-shaped, with symmetrically arranged receiving grooves 11 at the front. The motor 31 is placed behind the receiving grooves 11, and the output end of the motor 31 passes through the rear wall of the receiving grooves 11 and is located inside the receiving grooves 11. A primary transmission worm gear 311 is inserted into the output end of the motor 31. A first rotating frame 12 for cooperating with the first transmission group 32 is integrally formed below the primary transmission worm gear 311 on the base 1. The axis of the first rotating frame 12 is perpendicular to the axis of the output end of the motor 31. A second rotating frame 13 for cooperating with the second transmission group 33 is integrally formed on the right side of the receiving grooves 11. The axis of the second rotating frame 13 is parallel to the axis of the output end of the motor 31. A third rotating frame 14 for cooperating with the third transmission group 34 is provided on the upper side of the left and right side walls of the receiving grooves 11 on the base 1.

[0026] The first transmission group 32 includes a primary transmission turbine 321 and a secondary transmission worm 322. The central axes of the primary transmission turbine 321 and the secondary transmission worm 322 are on the same straight line, and the primary transmission turbine 321 and the secondary transmission worm 322 are integrally formed. The two ends of the first transmission group 32 are rotatably connected to the first rotating frame 12. The axis of the first transmission group 32 is perpendicular to the primary transmission worm 311, and the primary transmission turbine 321 is located below the primary transmission worm 311, and the primary transmission turbine 321 cooperates with the primary transmission worm 311.

[0027] The second transmission group 33 includes a secondary transmission turbine 331 and a tertiary transmission worm 332. The central axes of the secondary transmission turbine 331 and the tertiary transmission worm 332 are on the same straight line, and the secondary transmission turbine 331 and the tertiary transmission worm 332 are integrated. The two ends of the second transmission group 33 are rotatably connected to the second rotating frame 13, so that the axis of the second transmission group 33 is parallel to the axis of the primary transmission turbine 321, and the second transmission turbine is located below the secondary transmission worm 322. The second transmission turbine and the secondary transmission worm 322 cooperate with each other.

[0028] The third transmission group 34 includes a three-stage transmission turbine 341 and a four-stage transmission worm 342. The central axes of the three-stage transmission turbine 341 and the four-stage transmission worm 342 are on the same straight line, and the three-stage transmission turbine 341 and the four-stage transmission worm 342 are integrated. The third transmission group 34 is rotatably engaged with the third rotating frame 14. The three-stage transmission turbine 341 on the third transmission group 34 is engaged with the three-stage transmission worm 332, and the three-stage transmission turbine 341 is located above the three-stage transmission worm 332, so that the three-stage transmission turbine 341 is located slightly to the right in front of the first-stage transmission worm 311.

[0029] The four-stage transmission worm gear 342 is connected to the arc-shaped rack 2. The arc-shaped rack 2 includes a bottom arc portion 21 and a side arc portion 22. The bottom arc portion 21 is provided with a rack for transmission connection with the four-stage transmission worm gear 342. The end of the four-stage transmission worm gear 342 is provided with a protrusion. The side arc portion 22 is provided with a groove near the bottom arc portion 21. The protrusion and the groove are inserted into and slidably connected.

[0030] The motor 31 rotates, driving the first transmission group 32 below and perpendicular to it. The first transmission group 32 drives the second transmission group 33 below and perpendicular to it. The second transmission group 33 drives the third transmission group 34 above and perpendicular to it. The third transmission group 34 drives the arc-shaped rack 2 to rotate, thereby achieving micro-arc-level angle adjustment of the mirror floating plate. The three transmission groups are arranged orthogonally and perpendicularly. The second transmission group 33 is supported by the second rotating frame 13, the first transmission group 32 is supported by the first rotating frame 12 and the second transmission group 33, the motor 31 is supported by the second transmission group 33 and its own mounting surface, and the third transmission group 34 is supported by the third rotating frame 14 and the second transmission group 33. The motor 31 and the first transmission group 33... 2. The second transmission group 33 and the third transmission group 34 are interleaved and orthogonally supported and transmitted to each other. This not only realizes the closed-loop transmission of the power of the motor 31 to the rotation of the arc rack 2, but also the three-dimensional stacked transmission groups provide three-dimensional support to each other, making the transmission components structurally rigid. Moreover, the design of the three transmission groups keeps the arc rack 2 away from the motor 31, so that the running trajectory of the arc rack 2 is completely separated from the axial projection area of ​​the motor 31. This ensures a safe distance between the arc rack 2 and the motor 31, making the spatial arrangement of the arc rack 2 and the motor 31 both safe and stable. Even after the mirror driver is impacted, there is still a buffer space between the arc rack 2 and the motor 31 to ensure the integrity of the mirror driver's driving process.

[0031] Furthermore, in this embodiment, there are two transmission mechanisms 3. The motors 31 of the two transmission mechanisms 3 are fixed in the base 1 with parallel bolts. The first transmission group 32, the second transmission group 33, and the third transmission group 34 of the two transmission mechanisms 3 are symmetrically arranged. Through the two transmission mechanisms 3 with independent motors 31, one side of the mirror floating plate can have different rotation angles, thereby making the mirror floating plate have a richer rotation angle than a single motor 31. Generally speaking, the arrangement of two motors 31 will put more pressure on the layout of the transmission mechanism 3 in the mirror driver. However, the design of three transmission groups can make the running trajectory of the arc rack 2 completely separate from the axial projection area of ​​the motor 31, which is very suitable for the arrangement of two motors 31. There is no need to worry about the motors 31 encroaching on the space of the arc rack 2.

[0032] Furthermore, in this embodiment, the motor 31 is fixed to the base 1 by the bracket 4. There is a gap between the motor 31 and the base 1, and the two sides of the motor 31 are fan-shaped surfaces and the bottom is flat. On the one hand, the base 1, through the bracket 4, makes the output end of the motor 31 highly matched with the first transmission group 32. On the other hand, through the setting of the bracket 4, the motor 31 and the lower side of the base 1 have a certain gap, which makes it easier for the arc-shaped racks 2 on both sides of the front of the motor 31 to have a large displacement space, so that the motor 31 avoids the displacement path of the arc-shaped racks 2. The fan-shaped and flat design of the motor 31 also makes it easier to avoid the displacement path of the arc-shaped racks 2.

[0033] Furthermore, in this embodiment, a potentiometer 5 is bolted between the two third transmission groups 34 on the base 1, so that a potentiometer gear 343 is integrally formed on the fourth-stage transmission worm gear 342 of the third transmission group 34, so that the potentiometer gear 343 rotates with the fourth-stage transmission worm gear 342. The detection shaft of the potentiometer 5 is provided with a detection gear 51, which meshes with the potentiometer gear 343, thereby providing real-time feedback of the floating plate's position data to the potentiometer 5. The potentiometer 5 is a component that can convert mechanical position into electrical signal. The potentiometer 5 outputs an electrical signal corresponding to the floating plate's position and transmits it to the controller that is electrically connected to it, thereby memorizing the position adjusted by the car rearview mirror mirror driver.

[0034] The present invention does not impose any particular restrictions on the specific structure of the first transmission group, the second transmission group, and the third transmission group. Any structure that can realize the orthogonal transmission function of motor power, as well as those well known to those skilled in the art, can be selected and adjusted according to the specific application, raw material conditions, and product requirements.

[0035] It should be noted that the various embodiments of this application can be arbitrarily combined into new embodiments, provided that the solutions do not conflict and the technical solutions can coexist.

[0036] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A transmission assembly for a mirror actuator, comprising a base (1), a mirror floating plate disposed above the base (1), an arc-shaped rack (2), and a transmission mechanism (3), wherein the upper end of the arc-shaped rack (2) is hinged to the mirror floating plate, and the lower end is mounted on the base (1), and the arc-shaped rack (2) moves around a central axis A and is driven by the transmission mechanism (3), characterized in that: The transmission mechanism (3) includes a motor (31), a first transmission group (32), a second transmission group (33), and a third transmission group (34). The axis B of the output shaft of the motor (31) is perpendicular to the central axis A around which the arc rack (2) moves. The central axis C of the first transmission group (32) and the axis E of the third transmission group (34) are both parallel to the central axis A around which the arc rack (2) moves. The central axis D of the second transmission group (33) is parallel to the axis B of the output shaft of the motor (31). The first transmission group (32) is at least partially located below the output shaft of the motor (31), the second transmission group (33) is at least partially located below the first transmission group (32), and the third transmission group (34) is at least partially located above the second transmission group (33).

2. The transmission assembly according to claim 1, characterized in that: There are two transmission mechanisms (3), and the motors (31) of the two transmission mechanisms (3) are arranged in parallel. The first transmission group (32), the second transmission group (33) and the third transmission group (34) of the two transmission mechanisms (3) are all arranged symmetrically.

3. The transmission assembly according to claim 1, characterized in that: The first transmission group (32) includes a primary transmission turbine (321) and a secondary transmission worm (322). The central axes of the primary transmission turbine (321) and the secondary transmission worm (322) are on the same straight line, and the primary transmission turbine (321) and the secondary transmission worm (322) are integrated.

4. The transmission assembly according to claim 1, characterized in that: The second transmission group (33) includes a secondary transmission turbine (331) and a tertiary transmission worm (332). The central axes of the secondary transmission turbine (331) and the tertiary transmission worm (332) are on the same straight line, and the secondary transmission turbine (331) and the tertiary transmission worm (332) are integrated.

5. The transmission assembly according to claim 1, characterized in that: The third transmission group (34) includes a three-stage transmission turbine (341) and a four-stage transmission worm (342). The central axes of the three-stage transmission turbine (341) and the four-stage transmission worm (342) are on the same straight line, and the three-stage transmission turbine (341) and the four-stage transmission worm (342) are integrated.

6. The transmission assembly according to claim 1, characterized in that: The base (1) is provided with a receiving groove (11). Both ends of the first transmission group (32) and the second transmission group (33) are connected to the receiving groove (11). The upper end of the receiving groove (11) is provided with a third rotating frame (14). The third transmission group (34) is rotatably engaged with the third rotating frame (14).

7. The transmission assembly according to claim 5, characterized in that: The four-stage transmission worm (342) is connected to the arc-shaped rack (2). The arc-shaped rack (2) includes a bottom arc portion (21) and a side arc portion (22). The bottom arc portion (21) is provided with a rack for connecting to the four-stage transmission worm (342). The four-stage transmission worm (342) is inserted into and slidably connected to the side arc portion (22).

8. The transmission assembly according to claim 1, characterized in that: The motor (31) is fixed to the base (1) by the bracket (4). There is a gap between the motor (31) and the base (1). The two sides of the motor (31) are fan-shaped and the bottom is flat.

9. The transmission assembly according to claim 5, characterized in that: The base (1) has a potentiometer (5) between the two third transmission groups (34). A potential gear (343) is fixedly connected to the fourth-stage transmission worm (342) of the third transmission group (34). The potential gear (343) rotates with the fourth-stage transmission worm (342). The detection shaft of the potentiometer (5) meshes with the potential gear (343).

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