Driver, rearview mirror and vehicle

Abstract

The invention relates to a driver which comprises a driver body and a mandrel with the central axis extending along a first axis. The driver body comprises a driver shell, an output shaft, a first motor, a second motor, a first transmission mechanism and a second transmission mechanism, wherein the central axis of the output shaft extends along the second axis, the first transmission mechanism is in transmission between the first motor and the mandrel, and the second transmission mechanism is in transmission between the second motor and the output shaft. The first motor is used for driving the driver body to rotate around a first axis relative to the mandrel, the second motor is used for driving the output shaft to rotate around a second axis, the second axis is perpendicular to and intersects with the first axis, and the outer surface of the lower portion of the driver shell is provided with a spherical crown-shaped face suitable for being matched with a matching hole ball pair in the lower portion of a rearview mirror shell. The spherical crown-shaped surface is arranged around the first axis, and the spherical crown-shaped surface takes the intersection point of the first axis and the second axis as the sphere center. The anti-vibration performance, the waterproof performance and the self-locking stability of the integrated driver are improved, the clutch structure is optimized, and the integrated driver has the advantages of being easy to assemble and assemble.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle components, and particularly relates to a driver, a rearview mirror, and a vehicle. Background Art

[0002] The external rearview mirrors of some vehicles adopt an integrated driver. This integrated driver can drive the mirror housing and the lens of the external rearview mirror to rotate together around a vertical axis and a horizontal axis. By using the rotation of the mirror housing and the lens of the external rearview mirror together around the vertical axis, the folding function of the external rearview mirror can be realized to meet the requirement of the external rearview mirror to fold and approach the vehicle body. By using the rotation of the mirror housing and the lens of the external rearview mirror together around the vertical axis and the horizontal axis, the steering adjustment function of the external rearview mirror surface can be realized to meet the requirement of the driver for adjusting the rearview angle.

[0003] The existing integrated driver generally includes a mandrel rigidly connected to the base of the external rearview mirror, a worm gear connected to the mandrel, a driver body arranged on the outer periphery of the mandrel, and an output shaft installed in the driver body. A first motor, a second motor, a first transmission mechanism for transmitting power between the output end of the first motor and the worm gear, and a second transmission mechanism for transmitting power between the output end of the second motor and the output shaft are arranged inside the driver body. A mirror bracket is installed on the outside of the integrated driver. One side of the mirror bracket is connected to the output shaft, and the other side of the mirror bracket is hinged to the housing of the integrated driver through a pin shaft. The mirror housing and the lens of the external rearview mirror are installed on the mirror bracket. During operation, the first motor outputs power to drive the driver body to rotate around the mandrel. The driver body drives the mirror bracket to rotate around the mandrel, and further drives the mirror housing and the lens to rotate together around the vertical axis. The second motor outputs power to drive the output shaft to rotate. The output shaft drives the mirror bracket to rotate, and further drives the mirror housing and the lens to rotate together around the horizontal axis.

[0004] The existing integrated driver can drive the mirror housing and the lens to rotate integrally, and can form an external rearview mirror with a narrower or even borderless frame. However, the existing integrated driver has the following technical problems: The matching structure between the integrated driver and the mirror housing is not set reasonably enough. The center of gravity of the integrated driver is eccentric with respect to the rotation axis of the integrated driver, resulting in excessive vibration of the mirror housing and the lens during the driving of the vehicle, and further having an adverse impact on the NVH performance and driving safety performance of the vehicle.

[0005] During use, water may seep into the inside of the integrated driver from the parting surface between the upper housing and the lower housing of the integrated driver and the mating part between the top of the mandrel and the upper housing of the integrated driver, and further cause the motor and the circuit board of the integrated driver to get water. After the motor and the circuit board get water, they are easily damaged.

[0006] When the mirror housing and the lens are impacted by a large external force or rotated by being pulled, the first transmission mechanism and the second transmission mechanism are prone to overload and tooth damage. Therefore, it is usually necessary to provide a clutch structure at the output shaft and the core shaft to prevent the first transmission mechanism and the second transmission mechanism from overloading when the external rearview mirror is impacted or pulled by a large external force. Since the integrated drive has a high degree of integration and the layout space at the output shaft and the core shaft is limited, it is difficult to arrange a conventional clutch structure at the output shaft and the core shaft positions, and there may be problems with unstable operation when arranging a conventional clutch structure at the output shaft and the core shaft.

[0007] The worm and worm gear meshing mechanism composed of the worm of the first transmission mechanism itself has a self-locking force. The integrated drive mainly relies on the self-locking force between the worm of the first transmission mechanism and the worm gear to lock the position of the drive body, and then lock the positions of the mirror housing and the lens of the external rearview mirror in the circumferential direction of the vertical axis. However, due to the axial installation and positioning clearance and the radial meshing clearance of the worm of the first transmission mechanism, the self-locking stability between the worm gear and the worm of the first transmission mechanism is poor, resulting in a certain play angle of the external rearview mirror and poor anti-vibration performance of the external rearview mirror. Moreover, as the usage time of the external rearview mirror increases, the axial installation and positioning clearance and the radial meshing clearance of the worm of the first transmission mechanism may increase, resulting in worse self-locking stability between the worm gear and the worm of the first transmission mechanism.

[0008] The integrated drive has a large number of components and a high degree of integration, resulting in a large assembly difficulty. Moreover, some integrated drives also require an adapter to match the mirror housing of the external rearview mirror, increasing the assembly difficulty of the integrated drive. Summary of the Invention

[0009] The object of the present invention is to provide a drive, a rearview mirror and a vehicle to alleviate or eliminate at least one of the above technical problems.

[0010] A driver according to the present invention includes a driver body and a mandrel whose central axis extends along a first axis. The driver body includes a driver housing rotatably mounted on the outer periphery of the mandrel relative to the mandrel, an output shaft mounted in the driver housing and having a central axis extending along a second axis, a first motor mounted in the driver housing, a second motor mounted in the driver housing, a first transmission mechanism disposed in the driver housing and transmitting power between the first motor and the mandrel, and a second transmission mechanism disposed in the driver housing and transmitting power between the second motor and the output shaft. The first motor is used to drive the driver body to rotate around the first axis relative to the mandrel, the second motor is used to drive the output shaft to rotate around the second axis, the mandrel is adapted to be directly or indirectly fixedly connected to the rearview mirror base, the first axis extends in the up-down direction, the second axis is perpendicular to and intersects the first axis, and a spherical crown surface adapted to be in spherical pair cooperation with a mating hole in the lower part of the rearview mirror housing is provided on the outer surface of the lower part of the driver housing. The spherical crown surface is disposed around the first axis and has the intersection point of the first axis and the second axis as the center of the sphere.

[0011] Optionally, the lower part of the driver housing is provided with a spherical crown-shaped housing wall, and the spherical crown surface is located on the outer surface of the housing wall. The housing wall encloses an accommodation space. The driver housing includes an upper housing and a lower housing connected to the lower side of the upper housing, and the housing wall is located at the lower part of the lower housing.

[0012] Optionally, both the first motor and the second motor are mounted in the cavity formed by the upper housing and the lower housing, and the positions of the first motor and the second motor in the up-down direction are not lower than the position of the parting surface between the upper housing and the lower housing in the up-down direction.

[0013] Optionally, the bottom of the lower housing is provided with a first through hole for mating with the mandrel, and a mandrel step surface for supporting the lower housing is provided at the lower end of the mandrel.

[0014] Optionally, a mandrel central hole penetrating the mandrel in the up-down direction is provided in the mandrel. A second through hole and an annular groove surrounding the second through hole are provided at the top of the upper housing. The notch of the annular groove faces downward, and the upper end of the mandrel is inserted into the annular groove.

[0015] Optionally, the first transmission mechanism includes a first output worm connected to the output end of the first motor, a first intermediate worm gear meshing with the first output worm, a first intermediate gear coaxial and synchronously rotating with the first intermediate worm gear, a second intermediate gear meshing with the first intermediate gear, a first intermediate worm coaxial and synchronously rotating with the second intermediate gear, and a first transmission worm gear connected to the periphery of the mandrel. The first intermediate worm meshes with the first transmission worm gear.

[0016] Optionally, the driver further includes a second intermediate shaft, a second spring, and a clamping pin. The second intermediate gear and the first intermediate worm are both sleeved on the second intermediate shaft. The second spring applies an elastic force to the clamping pin. The clamping pin is adapted to radially press against the second intermediate shaft under the action of the elastic force to apply a first pre-tightening force to the second intermediate shaft to pre-tighten the second intermediate shaft toward the first transmission worm gear side. It further includes a third spring directly or indirectly acting on the first intermediate worm. The third spring applies a second pre-tightening force to the first intermediate worm to pre-tighten the first intermediate worm along its own axial direction.

[0017] Optionally, a detachable mounting bracket is provided inside the driver housing. The second intermediate shaft, the second spring, and the clamping pin are all installed in the mounting bracket. The mounting bracket is provided with a displacement space for the second intermediate shaft to displace toward the first transmission worm gear side under the action of the first pre-tightening force.

[0018] Optionally, the first transmission mechanism further includes a first clutch structure. The first transmission worm gear is connected to the mandrel through the first clutch structure. The first clutch structure includes a snap ring, an upper annular member, a first spring, and a lower annular member arranged in sequence from top to bottom. The upper annular member, the first spring, the lower annular member, and the first transmission worm gear are all sleeved on the periphery of the mandrel. The snap ring is clamped on the mandrel. The upper annular member is supported upward by the snap ring. The first transmission worm gear is supported downward by the lower housing. The lower annular member is supported downward by the first transmission worm gear. The upper end of the first spring pushes the upper annular member upward, and the lower end of the first spring pushes the lower annular member downward. The lower annular member is circumferentially fixedly connected and axially slidably connected to the mandrel. A separable engagement structure is provided between the lower annular member and the first transmission worm gear. When the torque of the first transmission worm gear relative to the lower annular member is greater than a preset value, the engagement structure separates so that the first transmission worm gear can rotate relative to the mandrel.

[0019] Optionally, the engaging structure includes a trapezoidal boss provided on the first driving worm gear and a trapezoidal groove provided on the lower annular member. The width of the trapezoidal boss in the circumferential direction of the first driving worm gear gradually decreases from bottom to top, and the trapezoidal groove cooperates with the trapezoidal boss; The upper annular member is circumferentially and axially slidably connected to the mandrel, and a first carbon brush is mounted on the upper annular member; An accommodation space for accommodating the lower annular member and the first spring is formed between the first driving worm gear and the mandrel.

[0020] Optionally, the second transmission mechanism includes a second output worm connected to the output end of the second motor, a second intermediate worm gear meshing with the second output worm, a second intermediate worm coaxial and synchronously rotating with the second intermediate worm gear, a third intermediate worm gear meshing with the second intermediate worm, a third intermediate worm coaxial and synchronously rotating with the third intermediate worm gear, and a second driving worm gear connected to the periphery of the output shaft. The third intermediate worm meshes with the second driving worm gear.

[0021] Optionally, the second transmission mechanism further includes a second clutch structure, and the second driving worm gear is connected to the output shaft through the second clutch structure; The second clutch structure includes a clutch spring. The output shaft includes a first output shaft section and a second output shaft section. The first output shaft section is used for connecting to the rearview mirror bracket or the rearview mirror housing. The second driving worm gear is sleeved on the second output shaft section. The clutch spring is a ring structure with a break; The inner side surface of the clutch spring contacts the outer peripheral surface of the second output shaft section, and a first convex portion inserted into the break is provided on the second driving worm gear, Alternatively, the outer side surface of the clutch spring contacts the inner peripheral surface of the second driving worm gear, and a second convex portion inserted into the break is provided on the second output shaft section.

[0022] Optionally, the clutch spring includes a main body portion and two end portions respectively located on both sides of the break; The inner side surface of the main body portion contacts the outer peripheral surface of the second output section. The inner side surfaces of the two end portions are spaced from the outer peripheral surface of the second output shaft section. The inner side surfaces of the two end portions are smoothly transitioned to the inner side surface of the main body portion, Alternatively, the outer side surface of the main body portion contacts the inner peripheral surface of the second driving worm gear. The outer side surfaces of the two end portions are spaced from the inner peripheral surface of the second driving worm gear. The outer side surfaces of the two end portions are smoothly transitioned to the outer side surface of the main body portion.

[0023] Optionally, the upper shell is provided with an insertion notch extending upward from the lower edge of the upper shell, a mounting seat is detachably inserted in the insertion notch, a supporting hole is provided on the mounting seat, and the output shaft includes a fifth shaft segment rotatably supported in the supporting hole; A rotation range limiting structure is provided between the output shaft and the mounting seat, and the rotation range limiting structure is used to limit the rotation range of the output shaft relative to the mounting seat; An axial limiting structure for preventing the output shaft from axially moving is provided between the mounting seat and the upper housing; The driver also includes a carbon brush arm fixedly connected to the output shaft in a circumferential direction, and a prying pin for prying the carbon brush slider is arranged on the carbon brush wall.

[0024] Optionally, a pin hole coaxially arranged with the output shaft is provided on the upper shell body, and the pin hole is used for hinged connection with a rearview mirror bracket or a rearview mirror housing.

[0025] Optionally, the driver further comprises a circuit board assembly installed in the cavity, and the position of the circuit board assembly in the up-down direction is not lower than the position of the parting surface between the upper shell and the lower shell in the up-down direction; The circuit board assembly comprises a circuit board with an arc-shaped carbon film on the lower side, and a straight carbon film on the upper side of the circuit board; The circuit board assembly also includes a carbon brush slider directly or indirectly connected to the circuit board in a manner that it can slide along the length direction of the linear carbon film, and the carbon brush slider is provided with a second carbon brush that contacts the linear carbon film.

[0026] The present invention also provides a rearview mirror, comprising any one of the above described drivers.

[0027] The present invention also provides a vehicle, comprising the above rearview mirror.

[0028] The present invention proposes an integrated driver suitable for a vehicle rearview mirror. The application of the driver can realize the overall rotation of the rearview mirror housing and the rearview mirror surface. The present invention improves the anti-vibration performance of the integrated driver, improves the waterproof performance of the integrated driver, and improves the self-locking stability of the integrated driver. The present invention optimizes the clutch structure at the output shaft and the core shaft. The driver proposed by the present invention has the characteristics of easy assembly and easy assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic diagram of the installation of the rearview mirror described in some embodiments; Figure 2 is a schematic diagram of the rearview mirror described in some embodiments rotating around a vertical axis; Figure 3Schematic diagram of the rearview mirror rotating about the horizontal axis in some embodiments; Figure 4 Schematic diagram of the structure of the driver in some embodiments; Figure 5 Schematic diagram of the structure of the driver in some embodiments; Figure 6 Exploded view of the driver in some embodiments; Figure 7 Cross-sectional view of the driver in some embodiments; Figure 8 For Figure 7 Enlarged view of part A in; Figure 9 Schematic diagram of the structure of the mandrel in some embodiments; Figure 10 Schematic diagram of the structure of the lower housing in some embodiments; Figure 11 Schematic diagram of the structure of the lower housing in some embodiments; Figure 12 Schematic diagram of the structure of the first driving worm gear in some embodiments; Figure 13 Schematic diagram of the structure of the first driving worm gear in some embodiments; Figure 14 Exploded view of part of the structure of the driver in some embodiments; Figure 15 Schematic diagram of the structure of the lower annular member in some embodiments; Figure 16 Schematic diagram of the structure of the upper annular member in some embodiments; Figure 17 Schematic diagram of the structure of the mounting bracket in some embodiments; Figure 18 Exploded view of the transmission assembly in some embodiments; Figure 19 Assembly schematic diagram of some components at the lower housing of the driver in some embodiments; Figure 20 Exploded view of the output shaft assembly in some embodiments; Figure 21 Cross-sectional view of the output shaft assembly in some embodiments; Figure 22 Schematic diagram of the structure of the circuit board assembly in some embodiments; Figure 23 Exploded view of the circuit board assembly in some embodiments; Figure 24 Schematic diagram of the structure of the upper housing in some embodiments; Figure 25 Assembly schematic diagram of some components at the upper housing in some embodiments; Figure 26 Schematic diagram of the structure of part of the transmission assembly in some embodiments; Figure 27 Exploded view of part of the structure of the transmission assembly in some embodiments; Figure 28 Schematic diagram of the structure of the mounting bracket in some embodiments; Figure 29 Schematic diagram of the structure of the mounting bracket in some embodiments; Figure 30 Schematic diagram of the structures of the gear cover, the second intermediate gear, and the first intermediate worm in some embodiments; Figure 31Schematic diagram of the assembly of some components at the lower housing of the driver described in some embodiments; Figure 32 Cross-section of the driver described in some embodiments; Figure 33 For Figure 32 Enlarged view of part B in Figure 34 Schematic diagram of the structure of part of the driver described in some embodiments; Figure 35 Exploded view of the output shaft assembly described in some embodiments; Figure 36 Sectional view of the output shaft assembly described in some embodiments; Figure 37 Sectional view of the output shaft assembly described in some embodiments; Figure 38 Exploded view of the output shaft assembly described in some embodiments; Figure 39 Schematic diagram of the structure of the output shaft assembly described in some embodiments; Figure 40 Schematic diagram of the structure of the second drive worm gear described in some embodiments; Figure 41 Schematic diagram of the structure of the output shaft assembly described in some embodiments; Figure 42 Exploded view of the second drive worm gear described in some embodiments; Figure 43 Installation schematic diagram of the output shaft assembly described in some embodiments.

[0030] Among them, 1 - mandrel; 2 - lower housing; 3 - upper housing; 4 - output shaft assembly; 5 - second motor; 6 - first motor; 7 - transmission assembly; 8 - circuit board assembly; 9 - snap ring; 10 - upper annular part; 11 - first spring; 12 - lower annular part; 13 - first driving worm gear; 14 - first antifriction gasket; 15 - second antifriction gasket; 16 - first output worm; 17 - second output worm; 18 - screw; 100 - rearview mirror; 200 - rearview mirror seat; 300 - first axis; 400 - second axis; 500 - intersection point; 600 - vehicle body; 101 - first mandrel section; 102 - mandrel step surface; 103 - second mandrel section; 104 - spline groove; 105 - clamping groove; 106 - fourth mandrel section; 107 - upper end of mandrel; 108 - circumferential positioning groove; 109 - mounting boss; 201 - spherical crown surface; 202 - first through hole; 203 - first annular rib; 204 - second annular rib; 205 - first connection hole; 206 - bracket mounting groove; 207 - first limiting rib; 208 - second limiting rib; 209 - first supporting surface; 2010 - first positioning post; 2011 - first semi-circular groove; 2012 - inner rib; 2013 - spring limiting part; 2014 - tenth limiting surface; 301 - pin hole; 302 - second through hole; 303 - annular groove; 304 - annular part; 305 - motor mounting groove; 306 - outer rib; 307 - second semi-circular groove; 308 - first limiting surface; 309 - insertion notch; 3010 - embedding groove; 3011 - inclined surface; 3012 - second supporting surface; 3013 - second positioning post; 3014 - first mating hole; 3015 - first limiting part; 3016 - second limiting part; 3017 - third positioning post; 3018 - second limiting surface; 3019 - second connection hole; 3020 - wire insertion port; 401 - mounting seat; 402 - output shaft; 403 - second driving worm gear; 404 - carbon brush arm; 405 - clutch spring; 406 - support sleeve; 4011 - annular seat body; 4012 - bearing hole; 4013 - seat body step surface; 4014 - third limiting surface; 4015 - wall part; 4016 - insertion part; 4021 - first output shaft section; 4022 - second output shaft section; 4023 - fifth output shaft section; 4024 - fourth output shaft section; 4025 - third output shaft section; 4026 - sixth output shaft section; 4027 - third convex part; 4028 - second convex part; 4029 - fourth convex part; 40210 - fifth convex part; 4031 - first helical tooth; 4032 - first inner peripheral surface; 4033 - concave part; 4034 - first convex part; 4035 - positioning groove; 4041 - carbon brush arm body; 4042 - extending part; 4043 - dial pin; 4044 - key groove; 4051 - outer side surface; 4052 - inner side surface; 4053 - break; 4054 - end part; 4061 - sleeve body; 4062 - positioning tooth; 4063 - second supporting surface; 1001 - upper annular part body;1002 - First carbon brush; 1003 - Central hole of upper annular part; 1004 - First spline; 1005 - Arm part; 1006 - Limit groove; 1007 - First annular boss; 1008 - Fourth limiting surface; 1009 - First annular groove; 1010 - Circumferential positioning rib; 1201 - Outer flange; 1202 - Central hole of lower annular part; 1203 - Second spline; 1204 - Trapezoidal groove; 1205 - Lower annular part body; 1301 - Second helical tooth; 1302 - Central hole of drive worm gear; 1303 - Bottom wall; 1304 - Trapezoidal boss; 1305 - Second inner circumferential surface; 1306 - Third annular rib; 701 - Mounting bracket; 702 - First gear assembly; 703 - Second gear assembly; 704 - Third gear assembly; 705 - Fourth gear assembly; 706 - Tightening pin; 707 - Second spring; 7011 - Fourth semi-circular groove; 7012 - Fifth semi-circular groove; 7013 - Sixth semi-circular groove; 7014 - Second mating hole; 7015 - Seventh semi-circular groove; 7016 - First accommodating groove; 7017 - Second accommodating groove; 7018 - Fifth limiting surface; 7019 - Sixth limiting surface; 70110 - Second space; 70111 - Inclined part; 70112 - Spring groove; 70113 - Guide hole; 70114 - Spring seat; 70115 - Guide groove; 70116 - Support rib; 70117 - Seventh limiting surface; 70118 - Eighth limiting surface; 70119 - Ninth limiting surface; 70120 - Bracket positioning hole; 7021 - First intermediate shaft; 7022 - First intermediate worm gear; 7023 - First intermediate gear; 7031 - Second intermediate shaft; 7032 - Second intermediate gear; 7033 - First intermediate worm; 7034 - Third antifriction gasket; 7035 - Gear cover; 7036 - Third spring; 70321 - Straight tooth; 70322 - Central hole of second intermediate gear; 70323 - Groove; 70324 - Guide rib; 70325 - Second shaft part; 70351 - Cover body; 70352 - Central hole of gear cover; 70353 - Fitting groove; 70354 - Second annular boss; 70355 - Second annular groove; 70356 - First shaft part; 7041 - Third intermediate shaft; 7042 - Second intermediate worm gear; 7043 - Second intermediate worm; 7051 - Fourth intermediate shaft; 7052 - Third intermediate worm gear; 7053 - Third intermediate worm; 7054 - Bearing body; 7055 - Bearing flange; 7061 - Pin body; 7062 - Outer convex ring; 7063 - Pin head; 801 - Circuit board; 802 - Plug pin; 803 - Pin; 804 - Circuit board positioning hole; 805 - Circuit board central hole; 806 - Carbon brush bracket; 807 - Guide shaft; 808 - Carbon brush slider; 809 - Dial groove; 8010 - Arc-shaped carbon film; 8011 - Second carbon brush; 8012 - Third connection hole; 8013 - Connection column; 8014 - Shaft head mounting groove; 8015 - Strip-shaped support part.; Detailed implementation mode

[0031] The embodiments of the present invention will be described below with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand the other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for explaining the present invention, rather than for limiting the protection scope of the present invention.

[0032] It should be noted that the diagrams provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner. Therefore, only the components related to the present invention are shown in the diagrams, rather than being drawn according to the number, shape, and size of the components in actual implementation. The type, quantity, and ratio of each component in actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0033] As Figures 4 to 6 shown, a driver includes a driver body and a mandrel 1 whose central axis extends along a first axis 300. The driver body includes a driver housing rotatably mounted on the outer periphery of the mandrel 1 relative to the mandrel 1, an output shaft 402 mounted in the driver housing and whose central axis extends along a second axis 400, a first motor 6 mounted in the driver housing, a second motor 5 mounted in the driver housing, a first transmission mechanism disposed in the driver housing and transmitting power between the first motor 6 and the mandrel 1, and a second transmission mechanism disposed in the driver housing and transmitting power between the second motor 5 and the output shaft 402. The first motor 6 is used to drive the driver body to rotate around the first axis 300 relative to the mandrel 1, the second motor 5 is used to drive the output shaft 402 to rotate around the second axis 400, the mandrel 1 is adapted to be directly or indirectly fixedly connected to the rearview mirror base 200, the first axis 300 extends in the up-down direction, the second axis 400 is perpendicular to and intersects the first axis 300, and a spherical crown surface 201 adapted to be in spherical pair cooperation with a mating hole in the lower part of the mirror housing of the rearview mirror 100 is provided on the outer surface of the lower part of the driver housing. The spherical crown surface 201 is arranged around the first axis 300 and has the intersection point 500 of the first axis 300 and the second axis 400 as the center of the sphere.

[0034] With the above technical solution, on the one hand, the spherical crown surface 201 is engaged with the mating hole at the lower part of the mirror housing 100 of the rearview mirror. The spherical crown surface 201 is in rotational contact with the mating hole or the damping ring at the mating hole. During the rotation of the mirror housing 100 of the rearview mirror, the edge of the mating hole rotates relative to the spherical crown surface 201. The spherical crown surface 201 can support and assist in positioning the mirror housing 100 of the rearview mirror, improving the anti-vibration performance of the rearview mirror 100. On the other hand, the center of the spherical crown surface 201 is nearly coincident with the geometric center, i.e., the center of gravity, of the rearview mirror 100, which can further improve the anti-vibration performance of the rearview mirror 100 and ensure the optical vibration performance of the rearview mirror 100 during vehicle driving. In specific implementation, the second axis 400 usually extends in the left-right direction.

[0035] When the above-mentioned driver is applied to the rearview mirror 100 of a vehicle, as Figures 1 to 3 shown, the mirror housing and the mirror surface of the rearview mirror 100 can be fixedly installed on the mirror bracket of the rearview mirror 100. The mirror bracket is connected to the output shaft 402. The lower end of the core shaft 1 is fixedly connected to the rearview mirror base 200, and the rearview mirror base 200 is fixedly connected to the vehicle body 600.

[0036] As Figure 2 shown, when the first motor 6 drives the driver body to rotate around the first axis 300 relative to the core shaft 1, the mirror bracket rotates with the driver body, and the mirror bracket drives the mirror housing and the mirror surface of the rearview mirror 100 to rotate around the first axis 300. The folding function of the rearview mirror 100 can be realized to meet the requirement of the rearview mirror 100 to fold and approach the vehicle body 600, and the mirror surface steering adjustment function can also be realized to meet the requirement of the driver for adjusting the rearview angle.

[0037] As Figure 3 shown, when the second motor 5 drives the output shaft 402 to rotate around the second axis 400, the output shaft 402 drives the mirror bracket to rotate around the second axis 400, and the mirror bracket drives the mirror housing and the mirror surface of the rearview mirror 100 to rotate around the second axis 400. The mirror surface steering adjustment function can be realized to meet the requirement of the driver for adjusting the rearview angle.

[0038] In specific implementation, the mating hole at the lower part of the mirror housing 100 of the rearview mirror is a through hole, and this mating hole can provide a channel for the core shaft 1 to pass downward out of the mirror housing 100 of the rearview mirror. Using the spherical crown surface 201 and the mating hole for spherical pair mating is also helpful for improving the sealing performance between the driver and the mirror housing 100 of the rearview mirror.

[0039] Generally, the mirror housing of the rearview mirror 100 can be set as a split part. The mirror housing of the rearview mirror 100 includes an upper shell and a bottom shell that are connected together, and the mating hole is arranged at the bottom of the bottom shell.

[0040] In some embodiments, as Figure 7 、 Figure 10and Figure 11 As shown in Figure 11 , a spherical crown-shaped shell wall is provided at the lower part of the driver housing. The spherical crown surface 201 is located on the outer surface of the shell wall, and the shell wall encloses an accommodation space. With the above technical solution, the accommodation space is formed by using the shell wall at the spherical crown surface 201, which can increase the volume of the cavity enclosed by the driver housing, provide more space for arranging components, and reduce the difficulty of arranging components inside the driver housing.

[0041] In some embodiments, such as Figure 7 , Figure 10 and Figure 11 As shown in Figure 7 , Figure 10 and Figure 11 , the driver housing includes an upper housing 3 and a lower housing 2 connected to the lower side of the upper housing 3. The shell wall is located at the lower part of the lower housing 2. With the above technical solution, the accommodation space is formed by using the shell wall at the spherical crown surface 201, making the volume of the lower part of the inner cavity of the lower housing 2 larger, providing more space for arranging components, and reducing the difficulty of arranging components inside the lower housing 2. The larger volume of the lower part of the inner cavity of the lower housing 2 enables the components around the core shaft 1 to be arranged lower, facilitating setting the position of the parting surface between the upper housing 3 and the lower housing 2 lower in the up-down direction.

[0042] In specific implementation, the upper housing 3 and the lower housing 2 connected to the lower side of the upper housing 3 can be fixedly connected together by multiple screws 18. A plurality of first connection holes 205 respectively cooperating with the multiple screws 18 are provided on the lower housing 2, and a plurality of second connection holes 3019 respectively cooperating with the multiple screws 18 are provided on the upper housing 3. The second connection holes 3019 can be set as through holes, and the first connection holes 205 can be set as threaded holes or blind holes that are threadedly engaged with the screws 18.

[0043] In some embodiments, both the first motor 6 and the second motor 5 are installed in the cavity enclosed by the upper housing 3 and the lower housing 2, and the positions of the first motor 6 and the second motor 5 in the up-down direction are not lower than the position of the parting surface between the upper housing 3 and the lower housing 2 in the up-down direction. Reasonably setting the relative positions of the first motor 6, the second motor 5 and the parting surface can prevent the first motor 6 and the second motor 5 from getting water, improving the waterproof performance of the driver.

[0044] In specific implementation, such as Figure 24 and Figure 25As shown in the figure, two motor mounting grooves 305 are provided on the upper housing 3. The two motor mounting grooves 305 are respectively located at the front and rear of the inner cavity of the upper housing 3. The first motor 6 and the second motor 5 are respectively installed in the two motor mounting grooves 305. Further, a plurality of first positioning posts 2010 for upwardly pressing the first motor 6 and the second motor 5 are provided in the lower housing 2. By providing a plurality of first positioning posts 2010, the first motor 6 and the second motor 5 can be pressed tightly in the two motor mounting grooves 305. Adopting this motor mounting structure has the characteristic of being easy to assemble.

[0045] In order to further improve the waterproof performance of the driver, as Figure 10 and Figure 25 shown, an outward convex rib 306 is provided along the lower edge of the upper housing 3, and an inward convex rib 2012 is provided along the upper edge of the lower housing 2. When the upper housing 3 and the lower housing 2 are fixedly connected together, the outward convex rib 306 surrounds the periphery of the inward convex rib 2012. By providing the inward convex rib 2012 and the outward convex rib 306 at the parting surface between the upper housing 3 and the lower housing 2, it is possible to prevent external water from entering the interior of the driver housing through the parting surface between the upper housing 3 and the lower housing 2.

[0046] In some embodiments, a first through hole 202 for mating with the core shaft 1 is provided at the bottom of the lower housing 2, and a core shaft step surface 102 for supporting the lower housing 2 is provided at the lower end of the core shaft 1. The cooperation between the core shaft 1 and the first through hole 202 can form a rotational support for the lower housing 2. Further, in order to reduce the friction between the core shaft step surface 102 and the lower housing 2, a second antifriction gasket 15 is provided between the bottom of the lower housing 2 and the core shaft step surface 102, and a second annular convex rib 204 for reducing the contact area with the second antifriction gasket 15 is provided at the bottom of the lower housing 2.

[0047] In specific implementation, the first through hole 202 is provided at the bottom of the spherical crown-shaped shell wall at the lower part of the driver housing, and the spherical crown surface 201 is located outside the first through hole 202.

[0048] In some embodiments, as Figure 7 、 Figure 8 and Figure 24As shown, a mandrel center hole penetrating the mandrel 1 in the up and down direction is provided inside the mandrel 1. The mandrel center hole can be used as a wire passing channel for the wire harness. A second through hole 302 and an annular groove 303 surrounding the second through hole 302 are provided at the top of the upper housing 3. The notch of the annular groove 303 faces downward, and the upper end of the mandrel 1 is inserted into the annular groove 303. With the above technical solution, the water at the top of the driver can flow downward through the mandrel center hole and be discharged from the driver. The annular portion 304 formed by the inner circle of the annular groove 303 can guide the water to flow into the mandrel center hole, preventing the water at the top of the driver from entering the driver housing through the gap between the upper end of the mandrel 1 and the upper housing 3, and improving the waterproof performance of the driver.

[0049] In specific implementation, the outer side wall of the annular groove 303 forms a first supporting surface that cooperates with the outer peripheral surface of the upper end of the mandrel 1, and the first supporting surface rotatably supports the upper end of the mandrel 1.

[0050] The mandrel 1 cooperates with the first through hole 202 to rotatably support the lower housing 2. The first supporting surface rotatably supports the upper end of the mandrel 1 to rotatably support the upper housing 3. These two supporting structures are used to support the left and right rotation of the driver body.

[0051] In some embodiments, as Figure 6 、 Figure 7 、 Figure 8 、 Figure 18 and Figure 19 shown, the first transmission mechanism includes a first output worm 16 connected to the output end of the first motor 6, a first intermediate worm gear 7022 meshing with the first output worm 16, a first intermediate gear 7023 coaxial and synchronously rotating with the first intermediate worm gear 7022, a second intermediate gear 7032 meshing with the first intermediate gear 7023, a first intermediate worm 7033 coaxial and synchronously rotating with the second intermediate gear 7032, and a first transmission worm gear 13 connected to the outer periphery of the mandrel 1. The first intermediate worm 7033 meshes with the first transmission worm gear 13. With the above technical solution, by arranging the first intermediate worm gear 7022, the first intermediate gear 7023, the second intermediate gear 7032, and the first intermediate worm 7033 to transmit between the first output worm 16 and the first transmission worm gear 13, it has the characteristic of being easy to arrange.

[0052] In specific implementation, the first intermediate worm wheel 7022 and the first intermediate gear 7023 can be fixedly connected together so that the first intermediate worm wheel 7022 and the first intermediate gear 7023 rotate synchronously. The first intermediate worm wheel 7022 and the first intermediate gear 7023 can be sleeved on the first intermediate shaft 7021 to form a first gear assembly 702, and the first intermediate worm wheel 7022 and the first intermediate gear 7023 can be rotatably installed in the driver housing by means of the first intermediate shaft 7021. The second intermediate gear 7032 and the first intermediate worm 7033 can be fixedly connected together so that the second intermediate gear 7032 and the first intermediate worm 7033 rotate synchronously. The second intermediate gear 7032 and the first intermediate worm 7033 can be sleeved on the second intermediate shaft 7031 to form a second gear assembly 703, and the second intermediate gear 7032 and the first intermediate worm 7033 can be rotatably installed in the driver housing by means of the second intermediate shaft 7031.

[0053] In some embodiments, as Figures 26 to 33 shown, the driver further includes a second intermediate shaft 7031, a second spring 707 and a top pin 706. Both the second intermediate gear 7032 and the first intermediate worm 7033 are sleeved on the second intermediate shaft 7031. The second spring 707 applies an elastic force to the top pin 706, and the top pin 706 is adapted to radially press against the second intermediate shaft 7031 under the action of the elastic force, so as to apply a first pre-tightening force to the second intermediate shaft 7031 to pre-tighten the second intermediate shaft 7031 toward the first driving worm wheel 13.

[0054] With the above technical solution, the second spring 707 and the top pin 706 are used to apply a radial first pre-tightening force to the second intermediate shaft 7031, so that the second intermediate shaft 7031 is pre-tightened toward the side of the first driving worm wheel 13, that is, the first intermediate worm 7033 is radially pre-tightened. By radially pre-tightening the first intermediate worm 7033, the radial meshing clearance between the first intermediate worm 7033 and the first driving worm wheel 13 can be reduced or even eliminated, so that the first intermediate worm 7033 and the first driving worm wheel 13 are kept in close meshing. With this radial pre-tightening structure, when the driver is applied to the rearview mirror 100, the play angle of the rearview mirror 100 can be reduced or even eliminated, which helps to improve the self-locking stability and anti-vibration performance of the vehicle rearview mirror 100.

[0055] Moreover, under the action of the elastic force of the second spring 707, the first intermediate worm 7033 can maintain a pre-tightened state. This prevents the radial meshing clearance between the first intermediate worm 7033 and the first driving worm wheel 13 from increasing with the increase of the service life of the rearview mirror 100, which helps to ensure the self-locking stability and anti-vibration performance of the vehicle rearview mirror 100.

[0056] In some embodiments, a detachable mounting bracket 701 is provided inside the driver housing, and the second intermediate shaft 7031, the second spring 707, and the clamping pin 706 are all mounted in the mounting bracket 701. Mounting the second intermediate shaft 7031, the second spring 707, and the clamping pin 706 in the mounting bracket 701 and then installing them together inside the driver housing has the characteristic of being easy to assemble.

[0057] In some embodiments, a displacement space is provided on the mounting bracket 701 for the second intermediate shaft 7031 to displace toward the first transmission worm wheel 13 under the action of a first pre-tightening force.

[0058] With the above technical solution, during the process of pre-tightening the first intermediate worm 7033 using the second spring 707 and the clamping pin 706, and maintaining the pre-tightening of the first intermediate worm 7033 using the second spring 707 and the clamping pin 706, there may be a situation where the second intermediate shaft 7031 and the first intermediate worm 7033 displace toward the first transmission worm wheel 13. For example, the second intermediate shaft 7031 and the first intermediate worm 7033 rotate at a small angle toward the first transmission worm wheel 13 under the action of the first pre-tightening force. The displacement of the second intermediate shaft 7031 and the first intermediate worm 7033 toward the first transmission worm wheel 13 can reduce or even eliminate the radial meshing clearance between the first intermediate worm 7033 and the first transmission worm wheel 13. By providing a displacement space on the mounting bracket 701, the second intermediate shaft 7031 mounted on the mounting bracket 701 can achieve the above displacement. In specific implementation, the displacement space can be determined according to the displacement envelope of the second intermediate shaft 7031.

[0059] In some embodiments, as Figures 26 to 29 shown, a fifth semi-circular groove 7012 and a sixth semi-circular groove 7013 are provided on the mounting bracket 701. The openings of the fifth semi-circular groove 7012 and the sixth semi-circular groove 7013 are arranged on the side close to the first transmission worm wheel 13. The fifth semi-circular groove 7012 and the sixth semi-circular groove 7013 are coaxially arranged. The two ends of the second intermediate shaft 7031 are respectively a first end and a second end. The first end of the second intermediate shaft 7031 is rotatably supported in the fifth semi-circular groove 7012, and the second end of the second intermediate shaft 7031 is rotatably supported in the sixth semi-circular groove 7013. With the above technical solution, using the fifth semi-circular groove 7012 and the sixth semi-circular groove 7013 to support the second intermediate shaft 7031 enables the second intermediate shaft 7031 to be rotatably supported on the mounting bracket 701, which has the characteristics of being easy to implement and easy to assemble.

[0060] In some embodiments, as Figure 10 、 Figure 32 and Figure 33As shown, the lower housing 2 is further provided with a first limiting rib 207 that blocks the first end of the second intermediate shaft 7031 on the side close to the first transmission worm gear 13. The first limiting rib 207 and the fifth semicircular groove 7012 are staggered in the axial direction of the second intermediate shaft 7031. The position of the first limiting rib 207 in the axial direction of the second intermediate shaft 7031 is closer to the end of the first end of the second intermediate shaft 7031 than the position of the fifth semicircular groove 7012 in the axial direction of the second intermediate shaft 7031. By adopting the above technical solution, the end of the first end of the second intermediate shaft 7031 is limited by setting the first limiting rib 207, so that the first end of the second intermediate shaft 7031 can be prevented from slipping out of the fifth semicircular groove 7012.

[0061] Further, such as Figure 32 and Figure 33 The displacement space shown includes a first space for the end of the first end of the second intermediate shaft 7031 to be displaced toward the side opposite to the first limiting rib 207 and a second space 70110 for the second end of the second intermediate shaft 7031 to be displaced toward the side of the first transmission worm gear 13. By adopting the above-mentioned first limiting rib 207, in conjunction with the above-mentioned first space and second space 70110, under the action of the first preload force, the second intermediate shaft 7031 can rotate a certain angle around its first end toward the side of the first transmission worm gear 13. When the second intermediate shaft 7031 rotates a certain angle around its first end toward the side of the first transmission worm gear 13, the first space provides a rotation space for the end of the first end of the second intermediate shaft 7031, and the second space 70110 provides a rotation space for the second end of the second intermediate shaft 7031. The above technical solution provides convenience for radially pre-tightening and maintaining radial pre-tightening of the second intermediate shaft 7031 and the first intermediate worm 7033 , and can better radially pre-tighten and maintain radial pre-tightening of the second intermediate shaft 7031 and the first intermediate worm 7033 .

[0062] As a preferred example, Figure 17 , Figure 18 , Figure 27 and Figure 29 As shown, the notch of the sixth semicircular groove 7013 is open, and the second end of the second intermediate shaft 7031 can be installed in the sixth semicircular groove 7013 through the open mouth. The installation structure of the second intermediate shaft 7031 formed by the fifth semicircular groove 7012, the first limiting rib 207 and the sixth semicircular groove 7013 has the characteristic of being easy to install. Moreover, the open mouth can form a second space 70110 for the second end of the second intermediate shaft 7031 to rotate a certain angle at a small angle toward the first transmission worm gear 13 side.

[0063] In some embodiments, Figure 28 , Figure 29 , Figure 32 and Figure 33As shown in the figure, a guiding hole 70113 communicating with the sixth semi-circular groove 7013 is provided on the mounting bracket 701. The tightening pin 706 is engaged with the guiding hole 70113, and the second spring 707 is supported between the tightening pin 706 and the mounting bracket 701, so that the pin head 7063 of the tightening pin 706 on the side close to the sixth semi-circular groove 7013 presses tightly against the second intermediate shaft 7031 in the radial direction of the second intermediate axis 7031. With the above technical solution, the tightening pin 706 presses against the second end of the second intermediate shaft 7031, which can drive the second intermediate shaft 7031 to rotate a small angle around the first end towards the first driving worm gear 13, and can better achieve the radial pre-tightening of the first intermediate worm 7033 and maintain the radial pre-tightening of the first intermediate worm 7033. The guiding hole 70113 can define the ejection direction of the tightening pin 706, so that the tightening pin 706 presses tightly against the second intermediate shaft 7031 in the radial direction of the second intermediate shaft 7031. In specific implementation, the central axis of the guiding hole 70113 is perpendicular to and intersects with the central axis of the sixth semi-circular groove 7013.

[0064] Further, as shown in Figure 27 、 Figure 32 and Figure 33 shown, an outer convex ring 7062 is provided on the tightening pin 706. The outer convex ring 7062 is adapted to be supported on the mounting bracket 701 to define the maximum ejection amount of the tightening pin 706 against the second intermediate shaft 7031. By providing the outer convex ring 7062, the maximum ejection amount of the tightening pin 706 against the second intermediate shaft 7031 can be defined, preventing the situation that the first intermediate worm 7033 presses too tightly against the first driving worm gear 13.

[0065] As a preferred example, as shown in Figure 27 、 Figure 32 and Figure 33 shown, the second spring 707 is a helical spring. The tightening pin 706 includes a pin body 7061, an outer convex ring 7062 and a pin head 7063 arranged in sequence. A spring groove 70112 for accommodating the second spring 707 is provided on the mounting bracket 701. Both ends of the guiding hole 70113 communicate with the spring groove 70112 and the sixth semi-circular groove 7013 respectively. The groove wall of the spring groove 70112 on the side opposite to the guiding hole 70113 constitutes a spring seat 70114. The pin head 7063 is engaged with the guiding hole 70113. The second spring 707 is inserted into the spring groove 70112 through the notch of the spring groove 70112. The pin body 7061 extends into the second spring 707. Both ends of the second spring 707 are respectively supported on the outer convex ring 7062 and the spring seat 70114. The second spring 707 is in a compressed state, and the second spring 707 presses tightly against the outer convex ring 7062. In specific implementation, the outer diameter of the outer convex ring 7062 is larger than the aperture of the guiding hole 70113, and the spring groove 70112 is a semi-circular groove.

[0066] As a specific example, as shown inFigure 34 As shown, a spring limiting portion 2013 for radially limiting the second spring 707 in the spring groove 70112 is further provided on the lower housing 2 of the driver. The provision of the spring limiting portion 2013 can prevent unnecessary deformation and displacement of the second spring 707 and ensure the normal operation of the second spring 707. In a specific implementation, the spring limiting portion 2013 can be set as a boss protruding from the bottom of the bracket mounting groove 206 or other similar structures. When the transmission assembly 7 is installed in the housing of the driver, the spring limiting portion 2013 radially limits the second spring 707 installed in the spring groove 70112.

[0067] Further, as Figure 28 shown, a guiding groove 70115 is provided on the mounting bracket 701. The guiding groove 70115 is used to guide the pin head 7063 of the pressing pin 706 to be inserted into the guiding hole 70113. The guiding groove 70115 is arranged on the periphery of one end of the guiding hole 70113 close to the spring groove 70112. During assembly, one end of the second spring 707 can be first abutted against the spring seat 70114, then the pin body 7061 of the pressing pin 706 is inserted into the other end of the second spring 707, then the pin head 7063 of the pressing pin 706 is abutted against the guiding groove 70115, and finally the pressing pin 706 is press-fitted to the guiding hole 70113 so that the pin head 7063 of the pressing pin 706 is inserted into the guiding hole 70113. By providing the guiding groove 70115, the assembly difficulty of the pressing pin can be reduced.

[0068] In some embodiments, as Figure 26 、 Figure 27 、 Figure 32 and Figure 33 shown, the driver further includes a third spring 7036 that directly or indirectly acts on the first intermediate worm 7033. The third spring 7036 applies a second pre-tightening force to the first intermediate worm 7033 to pre-tighten the first intermediate worm 7033 along its own axis. By using the third spring 7036 to apply an axial second pre-tightening force to the first intermediate worm 7033, the first intermediate worm 7033 is pre-tightened along its own axis. By axially pre-tightening the first intermediate worm 7033, the axial installation and positioning gap between the first intermediate worm 7033 and the first transmission worm wheel 13 can be reduced or even eliminated, so that the first intermediate worm 7033 and the first transmission worm wheel 13 are kept in close meshing. Applying the above axial pre-tightening structure in the driver of the rearview mirror 100 can reduce or even eliminate the play angle of the rearview mirror 100, which helps to improve the self-locking stability and anti-vibration performance of the vehicle rearview mirror 100.

[0069] Under the action of the elastic force of the third spring 7036, the first intermediate worm 7033 can maintain a pre-tightened state. This prevents the axial installation and positioning gap between the first intermediate worm 7033 and the first transmission worm wheel 13 from increasing as the service life of the rearview mirror 100 increases, which helps to ensure the self-locking stability and anti-vibration performance of the vehicle rearview mirror 100.

[0070] Moreover, by radially pre-tightening and axially pre-tightening the first intermediate worm 7033, the play angle of the rearview mirror 100 can be better reduced or even eliminated, and the self-locking stability and anti-vibration performance of the vehicle rearview mirror 100 can be better improved.

[0071] In some embodiments, as Figure 27 、 Figure 29 、 Figure 32 and Figure 33 shown, a seventh limiting surface 70117 and a fifth limiting surface 7018 are provided on the mounting bracket 701. The seventh limiting surface 70117, the second intermediate gear 7032, the first intermediate worm 7033, and the fifth limiting surface 7018 are sequentially distributed axially on the second intermediate shaft 7031. On the side of the second intermediate gear 7032 close to the seventh limiting surface 70117, a gear cover 7035 is connected in a circumferentially fixed and axially relatively slidable manner. The third spring 7036 is supported between the gear cover 7035 and the second intermediate gear 7032, so that the gear cover 7035 axially presses against the seventh limiting surface 70117 along the axial direction of the worm shaft, and the first intermediate worm 7033 axially presses against the fifth limiting surface 7018 along the axial direction of the worm shaft. By providing the seventh limiting surface 70117 and the fifth limiting surface 7018, the positions of the second intermediate gear 7032 and the first intermediate worm 7033 in the axial direction of the second intermediate shaft 7031 can be limited. By providing the gear cover 7035 and arranging the third spring 7036 between the gear cover 7035 and the second intermediate gear 7032, it helps to ensure the smooth rotation of the first intermediate worm 7033 and the second intermediate gear 7032.

[0072] As a preferred example, as Figure 27 、 Figure 30 、 Figure 32 and Figure 33As shown, straight teeth 70321 are provided on the outer periphery of the second intermediate gear 7032. A second intermediate gear central hole 70322 that mates with the second intermediate shaft 7031 is provided inside the second intermediate gear 7032. The second intermediate gear central hole 70322 axially penetrates the second intermediate gear 7032 along the axis of the second intermediate gear 7032. A groove 70323 is provided on one side of the second intermediate gear 7032 facing the seventh limiting surface 70117. The groove 70323 is a cylindrical groove coaxially provided with the second intermediate gear 7032 and with the groove opening facing the seventh limiting surface 70117. Guide ribs 70324 extending along the axis of the second intermediate gear 7032 are provided on the inner peripheral surface of the groove 70323. A gear cover central hole 70352 that mates with the second intermediate shaft 7031 is provided inside the gear cover 7035. The gear cover central hole 70352 axially penetrates the gear cover 7035 along the axis of the gear cover 7035. The gear cover 7035 is sleeved on the second intermediate shaft 7031 loosely. The outer peripheral surface of the gear cover 7035 mates with the inner peripheral surface of the groove 70323. The mating groove 70353 of the gear cover 7035 mates with the guide ribs 70324 on the inner peripheral surface of the groove 70323, so that the gear cover 7035 and the second intermediate gear 7032 are circumferentially fixedly connected and axially slidable relative to each other. The gear cover 7035, the second intermediate gear 7032, and the first intermediate worm 7033 rotate synchronously. Both ends of the third spring 7036 respectively abut against the gear cover 7035 and the bottom of the groove 70323. The elastic force exerted by the third spring 7036 on the gear cover 7035 causes the gear cover 7035 to abut against the seventh limiting surface 70117. The elastic force exerted by the third spring 7036 on the second intermediate gear 7032 causes the first intermediate worm 7033 to abut against the fifth limiting surface 7018.

[0073] That is to say, under the action of the spring force of the third spring 7036, the gear cover 7035 and the first intermediate worm 7033 always abut against the seventh limiting surface 70117 and the fifth limiting surface 7018 of the mounting bracket 701, eliminating the axial mounting positioning clearance of the first intermediate worm 7033 and always maintaining elastic preloading, thereby reducing the play angle of the rearview mirror 100 and helping to improve the self-locking stability and anti-vibration performance of the rearview mirror 100 during driving.

[0074] Further, as Figure 27 , Figure 30 , Figure 32 and Figure 33As shown in the figure, the third spring 7036 is a helical spring. The gear cover 7035 includes a cover body 70351 whose outer peripheral surface mates with the inner peripheral surface of the groove 70323, and a first shaft portion 70356 extending from the center of the cover body 70351 towards the bottom of the groove 70323. The center of the bottom of the groove 70323 is provided with a second shaft portion 70325 extending towards the notch. The third spring 7036 is sleeved on the first shaft portion 70356 and the second shaft portion 70325. The two ends of the third spring 7036 are respectively pressed against the gear cover 7035 and the bottom of the groove 70323, and the third spring 7036 is in a compressed state. During operation, the maximum compression amount of the third spring 7036 is defined by the contact between the first shaft portion 70356 and the second shaft portion 70325. In a specific implementation, a flanging is provided at the edge of the cover body 70351, and a second annular groove 70355 that mates with the end of the third spring 7036 is formed between the flanging and the first shaft portion 70356.

[0075] With the above technical solution, the gear cover 7035 and the third spring 7036 are arranged at the first end of the second intermediate shaft 7031, and the top pin 706 and the second spring 707 are arranged at the second end of the second intermediate shaft 7031, which has the characteristic of reasonable structural arrangement.

[0076] In some embodiments, as Figure 26 , Figure 27 , Figure 32 and Figure 33 shown, third antifriction gaskets 7034 are respectively installed between the gear cover 7035 and the seventh limiting surface 70117, and between the first intermediate worm 7033 and the fifth limiting surface 7018. The setting of the third antifriction gaskets 7034 can reduce the friction between the gear cover 7035 and the seventh limiting surface 70117, and can reduce the friction between the first intermediate worm 7033 and the fifth limiting surface 7018, which helps to ensure the smooth rotation of the first intermediate worm 7033 and the second intermediate gear 7032.

[0077] In a specific implementation, as Figure 27 shown, a second annular boss 70354 is provided on one side of the gear cover 7035 near the third antifriction gasket 7034. The second annular boss 70354 surrounds the periphery of the orifice on one side of the central hole 70352 of the gear cover near the third antifriction gasket 7034. By using the contact between the second annular boss 70354 and the third antifriction gasket 7034, the friction between the gear cover 7035 and the third antifriction gasket 7034 can be reduced.

[0078] As a preferred example, as Figure 26 , Figure 27 and Figure 30As shown, the second intermediate gear 7032 and the first intermediate worm 7033 form an integrally molded one-piece, which has the characteristics of being easy to implement and easy to assemble. Obviously, in specific implementation, the second intermediate gear 7032 and the first intermediate worm 7033 can also be two components, and the second intermediate gear 7032 and the first intermediate worm 7033 are fixedly connected together through a fixed connection structure.

[0079] As a preferred example, as Figure 26 , Figure 27 and Figure 29 shown, the mounting bracket 701 is provided with a first receiving groove 7016 and a second receiving groove 7017. The notch of the first receiving groove 7016 and the notch of the second receiving groove 7017 are arranged facing the first transmission worm gear 13. The fifth semi-circular groove 7012, the first receiving groove 7016, the second receiving groove 7017, and the sixth semi-circular groove 7013 are arranged in sequence and communicated in sequence. The first receiving groove 7016 is used to receive the second intermediate gear 7032, and the second receiving groove 7017 is used to receive the first intermediate worm 7033. During specific installation, the worm shaft can be integrally inserted into the fifth semi-circular groove 7012, the first receiving groove 7016, the second receiving groove 7017, and the sixth semi-circular groove 7013 through the notch of the fifth semi-circular groove 7012, the notch of the first receiving groove 7016, the notch of the second receiving groove 7017, and the notch of the sixth semi-circular groove 7013.

[0080] Furthermore, as Figure 29 , Figure 32 and Figure 33 shown, the mounting bracket 701 is provided with an eighth limiting surface 70118 and a ninth limiting surface 70119. The eighth limiting surface 70118 and the ninth limiting surface 70119 respectively block both sides of the second intermediate shaft 7031 in the axial direction, and the eighth limiting surface 70118 and the ninth limiting surface 70119 are used to define the axial position of the second intermediate shaft 7031.

[0081] In specific implementation, as Figure 7 , Figure 8 , Figure 10 , Figure 19 , Figure 31 , Figure 32 and Figure 34As shown in the figure, a bracket installation groove 206 for installing the installation bracket 701 is provided on the lower housing 2, and the installation bracket 701 can be fitted into the installation groove. In order to reduce the matching difficulty between the installation bracket 701 and the installation groove and reduce the matching contact area between the two, a plurality of support ribs 70116 for contacting the installation groove are provided on the installation bracket 701, and a plurality of second limiting ribs 208 for contacting the installation bracket 701 are provided in the installation groove. In order to reduce the installation difficulty of the installation bracket 701, an inclined portion 70111 for guiding is provided at the lower corner portion of the installation bracket 701.

[0082] In some embodiments, as Figure 18 shown, the second gear assembly 703 may be composed of only the second intermediate shaft 7031, the second intermediate gear 7032, the first intermediate worm 7033, and two third antifriction washers 7034. The second intermediate gear 7032, the first intermediate worm 7033, and two third antifriction washers 7034 can be sleeved on the second intermediate shaft 7031, the second intermediate gear 7032 and the first intermediate worm 7033 can also be integrally sleeved on the second intermediate shaft 7031, and the second intermediate gear 7032 and the first intermediate worm 7033 can also be integrally formed with the second intermediate shaft 7031.

[0083] That is to say, in specific implementation, the transmission assembly can also work without setting an axial preloading structure. Obviously, in specific implementation, the transmission assembly can also not set a radial preloading structure, and the transmission assembly can also work without setting a radial preloading structure.

[0084] In some embodiments, as Figure 6 and Figure 7 shown, the first transmission mechanism further includes a first clutch structure, and the first transmission worm wheel 13 is connected to the core shaft 1 through the first clutch structure. Setting the first clutch structure between the first transmission worm wheel 13 and the core shaft 1 can prevent tooth damage caused by overload.

[0085] In some embodiments, as Figure 6 , Figure 7 and Figure 14As shown in the figure, the first clutch structure includes a snap ring 9, an upper annular member 10, a first spring 11, and a lower annular member 12 arranged in sequence from top to bottom. The upper annular member 10, the first spring 11, the lower annular member 12, and the first transmission worm gear 13 are all sleeved on the periphery of the core shaft 1. The snap ring 9 is clamped on the core shaft 1. The upper annular member 10 is supported upward by the snap ring 9. The first transmission worm gear 13 is supported downward by the lower housing 2. The lower annular member 12 is supported downward by the first transmission worm gear 13. The upper end of the first spring 11 abuts the upper annular member 10 upward, and the lower end of the first spring 11 abuts the lower annular member 12 downward. The lower annular member 12 is fixedly connected to the core shaft 1 in the circumferential direction and is axially slidable. A separable engagement structure is provided between the lower annular member 12 and the first transmission worm gear 13. When the torque of the first transmission worm gear 13 relative to the lower annular member 12 is greater than a preset value, the engagement structure separates so that the first transmission worm gear 13 can rotate relative to the core shaft 1.

[0086] Adopting the above technical solution, on the one hand, the first clutch structure can be formed between the first transmission worm gear 13 and the core shaft 1 by using the snap ring 9, the upper annular member 10, the first spring 11, and the lower annular member 12. On the other hand, the lower annular member 12 is supported downward by the first transmission worm gear 13, the first transmission worm gear 13 is supported downward by the lower housing 2, and the lower housing 2 is supported downward by the core shaft step surface 102. The spring force applied by the first spring 11 to the lower annular member 12 can elastically fix the lower housing 2 in the up and down directions.

[0087] As a preferred example, as Figure 13 and Figure 15 shown in the figure, the engagement structure includes a trapezoidal boss 1304 provided on the first transmission worm gear 13 and a trapezoidal groove 1204 provided on the lower annular member 12. The width of the trapezoidal boss 1304 in the circumferential direction of the first transmission worm gear 13 gradually decreases from bottom to top, and the trapezoidal groove 1204 cooperates with the trapezoidal boss 1304. In specific implementation, three trapezoidal bosses 1304 evenly distributed in the circumferential direction can be provided on the first transmission worm gear 13, and three trapezoidal grooves 1204 evenly distributed in the circumferential direction can be provided on the lower annular member 12.

[0088] Under the action of the spring force of the first spring 11, the first driving worm gear 13 engages with the trapezoidal groove 1204 of the lower annular member 12 through the trapezoidal boss 1304 to form a first clutch structure that rotates around the first axis 300. When the driver is powered on and adjusted left and right, the first intermediate worm 7033 meshes with the first driving worm gear 13 to drive the rearview mirror 100 to rotate. The first clutch structure is in the engaged state, and both the first driving worm gear 13 and the lower annular member 12 are circumferentially fixed relative to the core shaft 1, and the first driving worm gear 13 and the lower annular member 12 cannot rotate relative to the core shaft 1. When the rearview mirror 100 is manually adjusted emergently left and right, the first intermediate worm 7033 and the first driving worm gear 13 are in the self-locking state. The first driving worm gear 13 and the worm rotate together with the rearview mirror 100. The first driving worm gear 13 forcibly jacks up the lower annular member 12 upward through the trapezoidal boss 1304 and compresses the first spring 11. The first clutch structure is in the disengaged state, which plays an overload protection role for the transmission mechanism.

[0089] As a preferred example, as Figure 6 and Figure 7 shown, a first antifriction gasket 14 is provided between the lower housing 2 and the first driving worm gear 13. A first annular rib 203 that contacts the lower side surface of the first antifriction gasket 14 is provided on the lower housing 2. A third annular rib 1306 that contacts the upper side surface of the first antifriction gasket 14 is provided on the bottom surface of the first driving worm gear 13. By providing the first antifriction gasket 14, the rotational friction resistance can be reduced. By providing the first annular rib 203 and the third annular rib 1306 to reduce the contact area, the rotational friction resistance can be further reduced.

[0090] In some embodiments, as Figure 7 shown, a receiving space for accommodating the lower annular member 12 and the first spring 11 is formed between the first driving worm gear 13 and the core shaft 1. By providing this receiving space, the requirement for the height dimension of the lower housing 2 can be reduced, which helps the parting surface between the upper housing 3 and the lower housing 2 to be set lower.

[0091] In specific implementation, as Figure 6 、 Figure 7 、 Figure 12 and Figure 13 shown, a second helical tooth 1301 is provided on the outer peripheral surface of the first driving worm gear 13. The inner peripheral surface of the first driving worm gear 13 is the second inner peripheral surface 1305. A bottom wall 1303 extending inward is provided at the bottom of the first driving worm gear 13. The bottom wall 1303 encloses a driving worm gear center hole 1302 for cooperating with the core shaft 1. The trapezoidal boss 1304 can be provided on the upper side surface of the bottom wall 1303. The driving worm gear center hole 1302 cooperates with the core shaft 1, and the space between the second inner peripheral surface 1305 and the core shaft 1 is the receiving space.

[0092] In some embodiments, as Figure 6and Figure 14 As shown in Figure 14 , the upper annular member 10 is circumferentially fixedly connected and axially slidably connected to the mandrel 1. A first carbon brush 1002 is mounted on the upper annular member 10. The first carbon brush 1002 is elastically in contact with the arc-shaped carbon film 8010 on the circuit board 801 to form an annular sliding displacement transducer for potential feedback of the left and right angular position signals of the driver.

[0093] In some embodiments, an arm portion 1005 is provided on the upper annular member 10, and the first carbon brush 1002 is fixed to the arm portion 1005 by hot melting with a positioning post.

[0094] Further, as shown in Figure 14 , Figure 16 and Figure 19 As shown in Figure 19 , the side surfaces on both sides of the arm portion 1005 in the circumferential direction of the upper annular member 10 can serve as the fourth limiting surfaces 1008, and the two fourth limiting surfaces 1008 and the two tenth limiting surfaces 2014 on the lower housing 2 form a rotation range limiting structure for limiting the rotation range of the upper annular member 10, and this rotation range limiting structure limits the maximum limiting angle of the left and right rotation of the upper annular member 10.

[0095] In some examples, as shown in Figure 6 , Figure 14 and Figure 16 As shown in Figure 16 , the upper annular member 10 includes an annular upper annular member body 1001. The upper annular member body 1001 encloses an upper annular member central hole 1003 for cooperating with the mandrel 1. A limiting groove 1006 for fitting the snap ring 9 is provided on the upper side surface of the upper annular member body 1001. The provision of the limiting groove 1006 can prevent the snap ring 9 from coming off. In specific implementation, the snap ring 9 can be an open snap ring, and the limiting groove 1006 can preferably prevent the open snap ring from coming off.

[0096] In some examples, a first annular groove 1009 for cooperating with the upper end portion of the first spring 11 is provided on the lower side of the upper annular member body 1001.

[0097] In some examples, a first annular boss 1007 that forms a hole-shaft fit with the second inner circumferential surface 1305 of the first driving worm gear 13 is provided on the periphery of the upper annular member body 1001 to play an auxiliary positioning role for the first driving worm gear 13.

[0098] In some examples, as shown in Figure 6 , Figure 14 and Figure 15As shown, the lower annular member 12 includes an annular lower annular member body 1205 and an outer flange 1201 extending outward from the lower end of the lower annular member body 1205. The upper part of the lower annular member body 1205 extends into the lower end of the first spring 11, and the lower end of the first spring 11 acts downward on the outer flange 1201. The lower annular member body 1205 encloses a lower annular member central hole 1202, and a trapezoidal groove 1204 is provided on the lower end surface of the lower annular member 12.

[0099] In a specific implementation, as Figure 9 shown, the mandrel 1 includes a first mandrel section 101, a second mandrel section 103, a third mandrel section, and a fourth mandrel section 106 arranged in sequence from bottom to top. The upper end of the fourth mandrel section 106 is the upper end of the mandrel 107, and a clamping groove 105 for clamping the snap ring 9 is provided in the region between the third mandrel section and the fourth mandrel section 106. The outer diameter of the first mandrel section 101 is greater than the outer diameter of the second mandrel section 103. A mandrel step surface 102 is located between the first mandrel section 101 and the second mandrel section 103. The second mandrel section 103 is fitted with the first through hole 202 and the transmission worm central hole 1302. A fixed connection structure for fixedly connecting with the rearview mirror base 200 is provided at the bottom of the first mandrel section 101, and this fixed connection structure includes a concave-convex structure and a connection hole.

[0100] Further, as Figure 7 、 Figure 9 、 Figure 15 and Figure 16 shown, a spline groove 104 with a length extending along the axial direction of the mandrel 1 is provided on the third mandrel section. A first spline 1004 that cooperates with the spline groove 104 is provided on the hole wall of the upper annular member central hole 1003 to achieve circumferential fixation and axial sliding connection between the upper annular member 10 and the mandrel 1. A second spline 1203 that cooperates with the spline groove 104 is provided in the lower annular member central hole 1202 to achieve circumferential fixation and axial sliding connection between the lower annular member 12 and the mandrel 1.

[0101] As a specific example, as Figure 5 、 Figure 7 、 Figure 9 and Figure 14As shown, the concave-convex structure at the bottom of the first mandrel section 101 includes three mounting bosses 109 arranged at intervals in the circumferential direction of the mandrel 1. The three mounting bosses 109 have one large size and two small sizes in the circumferential direction of the mandrel 1. The mounting boss 109 with the large size is a left-right symmetric structure with the left-right symmetry plane of the mandrel 1 as the symmetry plane, and the two mounting bosses 109 with small sizes are symmetric structures with each other with the left-right symmetry plane of the mandrel 1 as the symmetry plane. By using the above three mounting bosses 109 to be fixedly connected with the rearview mirror base 200, the circumferential position of the mandrel 1 can be limited. A circumferential positioning rib 1010 is arranged in the spline groove of the upper annular member 10, and a circumferential positioning groove 108 is arranged in the spline of the mandrel 1. The circumferential positioning rib 1010 is inserted into the circumferential positioning groove 108 to limit the relative position of the mandrel 1 and the upper annular member 10 in the circumferential direction. By limiting the relative position of the mandrel 1 and the upper annular member 10 in the circumferential direction, the initial position of the first carbon brush 1002 can be limited.

[0102] More specifically, when the first carbon brush 1002 is in the initial position, the arm portion 1005 of the upper annular member 10 is located at the front-rear symmetry plane of the mandrel 1. The arm portion 1005 of the upper annular member 10 is located in the middle of the two tenth limiting surfaces 2014 in the circumferential direction, and the circumferential angular distance between the arm portion 1005 of the upper annular member 10 and the two tenth limiting surfaces 2014 is the same. Such an installation relationship obtains sufficient rotation space for the normal inward folding of the rearview mirror and the strong outward folding in special cases, and at the same time, the driver can be applied to the left rearview mirror and the right rearview mirror of the vehicle, that is, the same driver can be directly used for both the left and right rearview mirrors.

[0103] In some embodiments, as Figure 6 、 Figure 17 and Figure 18 shown, the second transmission mechanism includes a second output worm 17 connected to the output end of the second motor 5, a second intermediate worm wheel 7042 meshing with the second output worm 17, a second intermediate worm 7043 coaxial and synchronously rotating with the second intermediate worm wheel 7042, a third intermediate worm wheel 7052 meshing with the second intermediate worm 7043, a third intermediate worm 7053 coaxial and synchronously rotating with the third intermediate worm wheel 7052, and a second transmission worm wheel 403 connected to the periphery of the output shaft 402. The third intermediate worm 7053 meshes with the second transmission worm wheel 403.

[0104] By adopting the above technical solution, by arranging the second intermediate worm wheel 7042, the second intermediate worm 7043, the third intermediate worm wheel 7052 and the third intermediate worm 7053 to transmit between the second output worm 17 and the second transmission worm wheel 403, it has the characteristic of being easy to arrange.

[0105] In specific implementation, the second intermediate worm gear 7042 and the second intermediate worm 7043 can be fixedly connected together so that the second intermediate worm gear 7042 and the second intermediate worm 7043 rotate synchronously. The second intermediate worm gear 7042 and the second intermediate worm 7043 can be sleeved on the third intermediate shaft 7041 to form a third gear assembly 704, and the second intermediate worm gear 7042 and the second intermediate worm 7043 can be rotatably installed in the driver housing by means of the third intermediate shaft 7041.

[0106] The third intermediate worm gear 7052 and the third intermediate worm 7053 can be fixedly connected together so that the third intermediate worm gear 7052 and the third intermediate worm 7053 rotate synchronously. The third intermediate worm gear 7052 and the third intermediate worm 7053 can be sleeved on the fourth intermediate shaft 7051 to form a fourth gear assembly 705, and the third intermediate worm gear 7052 and the third intermediate worm 7053 can be rotatably installed in the driver housing by means of the fourth intermediate shaft 7051.

[0107] The third intermediate worm gear 7052 and the third intermediate worm 7053 can also be fixedly connected to the fourth intermediate shaft 7051 so that the third intermediate worm gear 7052 and the third intermediate worm 7053 rotate synchronously. As a specific example, the third intermediate worm 7053 and the fourth intermediate shaft 7051 are integrally formed by metal turning, and the third intermediate worm gear 7052 is formed on the fourth intermediate shaft 7051 by injection molding and encapsulation. By placing the above-mentioned integrally formed metal turning part into the mold and injecting and encapsulating the third intermediate worm gear 7052, the integral fourth gear assembly 705 can be formed.

[0108] In some embodiments, as Figure 20 shown, the output shaft 402 and the second transmission worm gear 403 can be connected through a fifth convex portion 40210 and a concave portion 4033. The fifth convex portion 40210 can be provided on the output shaft 402, and the concave portion 4033 can be provided on the first inner peripheral surface 4032 of the second transmission worm gear 403. The fifth convex portion 40210 and the concave portion 4033 cooperate to enable the output shaft 402 and the second transmission worm gear 403 to rotate synchronously. In specific implementation, a first helical tooth 4031 is provided on the outer periphery of the second transmission worm gear 403.

[0109] In some embodiments, the second transmission mechanism further includes a second clutch structure, and the second transmission worm gear 403 is connected to the output shaft 402 through the second clutch structure. Arranging the second clutch structure between the second transmission worm gear 403 and the output shaft 402 can prevent tooth damage caused by overload.

[0110] In some embodiments, as Figure 35 and Figure 36As shown in the figure, the second clutch structure includes a clutch spring 405. The output shaft 402 includes a first output shaft section 4021 and a second output shaft section 4022. The first output shaft section 4021 is used to connect with the mirror bracket or the mirror housing of the rearview mirror 100. The second transmission worm wheel 403 is sleeved on the second output shaft section 4022 in an idle state. The clutch spring 405 is a ring structure with a break 4053. The inner side surface 4052 of the clutch spring 405 contacts the outer peripheral surface of the second output shaft section 4022, and a first convex portion 4034 inserted into the break 4053 is provided on the second transmission worm wheel 403.

[0111] With the above technical solution, the clutch spring 405 forms a clutch structure between the second transmission worm wheel 403 and the output shaft 402. The first convex portion 4034 on the second transmission worm wheel 403 is inserted into the break 4053, so that a circumferential connection is realized between the second transmission worm wheel 403 and the clutch spring 405, and the second transmission worm wheel 403 and the clutch spring 405 rotate synchronously. The inner side surface 4052 of the clutch spring 405 contacts the outer peripheral surface of the second output shaft section 4022, and the frictional force between the inner side surface 4052 of the clutch spring 405 and the outer peripheral surface of the second output shaft section 4022 keeps the clutch spring 405 and the second output shaft section 4022 in a combined state.

[0112] The driving force output by the second motor 5 inside the driver is transmitted to the second transmission worm wheel 403 through the second transmission mechanism. When the clutch spring 405 and the second output shaft section 4022 are in a combined state, the driving force can be transmitted to the output shaft 402 through the second transmission worm wheel 403 and the clutch spring 405, and the output shaft 402 can output the driving force to the mirror bracket or the mirror housing of the rearview mirror 100 to drive the mirror housing and the lens of the rearview mirror 100 to rotate around the axis of the output shaft 402, so as to realize the steering adjustment of the rearview mirror 100 mirror surface and meet the driver's need for rearview angle adjustment.

[0113] When the mirror housing and the lens of the rearview mirror 100 are impacted or pulled by a large external force, since the second transmission worm wheel 403 is in a self-locking stationary state, when the external force received by the output shaft 402 is large enough to cause frictional slipping between the clutch spring 405 and the second output shaft section 4022, the output shaft 402 can rotate relative to the second transmission worm wheel 403 and the clutch spring 405, playing an overload protection role for the second transmission worm wheel 403 and the gear transmission mechanism, and preventing the second transmission worm wheel 403 and the gear transmission mechanism from suffering tooth damage. For example, when manually adjusting the rearview mirror 100 emergently, frictional slipping occurs between the clutch spring 405 and the second output shaft section 4022, which can play an overload protection role for the second transmission worm wheel 403 and the gear transmission mechanism and prevent the second transmission worm wheel 403 and the gear transmission mechanism from suffering tooth damage.

[0114] That is to say, in the above technical solution, by arranging a clutch spring 405 between the output shaft 402 and the second transmission worm gear 403, it is possible to prevent the gear transmission structure in the rearview mirror 100 driver from being overloaded when the rearview mirror 100 is impacted or pulled by a large external force, prevent tooth damage in the rearview mirror 100 driver, and achieve the protection of the manual emergency adjustment of the rearview mirror 100 driver.

[0115] Moreover, the clutch spring 405 is arranged between the first inner peripheral surface 4032 of the second transmission worm gear 403 and the outer peripheral surface of the second output shaft section 4022, with less demand for the layout space at the output shaft 402 and being easy to arrange. The clutch spring 405 uses the frictional force between its inner side surface 4052 and the outer peripheral surface of the second output shaft section 4022 to achieve engagement, and can also meet the clutch requirement between the output shaft 402 and the second transmission worm gear 403 when the rotation angle of the output shaft 402 is small.

[0116] In the above technical solution, the clutch function is achieved by the contact and relative sliding between the inner side surface 4052 of the clutch spring 405 and the outer peripheral surface of the second output shaft section 4022. Obviously, in specific implementation, the clutch function can also be achieved by the contact and relative sliding between the outer side surface 4051 of the clutch spring 405 and the first inner peripheral surface 4032 of the second transmission worm gear 403. In some other embodiments, the outer side surface 4051 of the clutch spring 405 contacts the first inner peripheral surface 4032 of the second transmission worm gear 403, and a second convex portion 4028 is arranged on the second output shaft section 4022 and inserted into a break 4053. The second convex portion 4028 on the second output shaft section 4022 is inserted into the break 4053, so that a circumferential connection is achieved between the second output shaft section 4022 and the clutch spring 405, and the clutch spring 405 rotates synchronously with the output shaft 402. The outer side surface 4051 of the clutch spring 405 contacts the first inner peripheral surface 4032 of the second transmission worm gear 403, and the frictional force between the outer side surface 4051 of the clutch spring 405 and the first inner peripheral surface 4032 of the second transmission worm gear 403 keeps the clutch spring 405 and the second transmission worm gear 403 in an engaged state.

[0117] In specific implementation, the friction characteristics between the clutch spring 405 and the surfaces in frictional contact therewith can be calibrated according to the design requirements of the driver. The friction characteristics between the clutch spring 405 and the surfaces in frictional contact therewith can be adjusted by adjusting the spring force of the clutch spring 405. For example, the magnitude of the frictional force between the clutch spring 405 and the surfaces in frictional contact therewith can be adjusted by adjusting the spring force of the clutch spring 405.

[0118] In some embodiments, such as Figure 37 and Figure 38As shown, the clutch spring 405 includes a main body portion and two end portions 4054 respectively located on both sides of the break 4053. The two end portions 4054 are spaced apart from each other, and the opening between the two end portions 4054 is the above-mentioned break 4053. The outer side surface 4051 of the main body portion contacts the first inner peripheral surface 4032 of the second transmission worm wheel 403, that is, the outer side surface 4051 of the clutch spring 405 contacts the inner peripheral surface of the second transmission worm wheel 403 by using the contact between the outer side surface 4051 of the main body portion and the first inner peripheral surface 4032 of the second transmission worm wheel 403. The outer side surfaces 4051 of the two end portions 4054 are spaced apart from the first inner peripheral surface 4032 of the second transmission worm wheel 403, and the outer side surfaces 4051 of the two end portions 4054 and the outer side surface 4051 of the main body portion are smoothly transitioned. By adopting the above technical solution, it is possible to prevent the end surfaces of the two end portions 4054 from scratching the first inner peripheral surface 4032 of the second transmission worm wheel 403, and the stability of the friction force between the outer side surface 4051 of the main body portion and the first inner peripheral surface 4032 of the second transmission worm wheel 403 can be ensured, so that the clutch quality of the clutch structure is more stable, and further the stable operation of the output rotating shaft assembly is ensured.

[0119] In some embodiments, as Figure 35 and Figure 36 shown, the clutch spring 405 includes a main body portion and two end portions 4054 respectively located on both sides of the break 4053. The inner side surface 4052 of the main body portion contacts the outer peripheral surface of the second output shaft segment 4022, that is, the inner side surface 4052 of the clutch spring 405 contacts the outer peripheral surface of the second output shaft segment 4022 by using the contact between the inner side surface 4052 of the main body portion and the outer peripheral surface of the second output shaft segment 4022. The inner side surfaces 4052 of the two end portions 4054 are spaced apart from the outer peripheral surface of the second output shaft segment 4022, and the inner side surfaces 4052 of the two end portions 4054 and the inner side surface 4052 of the main body portion are smoothly transitioned. By adopting the above technical solution, it is possible to prevent the end surfaces of the two end portions 4054 from scratching the outer peripheral surface of the second output shaft segment 4022, and the stability of the friction force between the inner side surface 4052 of the main body portion and the outer peripheral surface of the second output shaft segment 4022 can be ensured, so that the clutch quality of the clutch structure is more stable, and further the stable operation of the output rotating shaft assembly is ensured.

[0120] In some embodiments, the two end portions 4054 extend obliquely with respect to the extending direction of the main body portion, and the two end portions 4054 and the main body portion are transitioned through an arc portion, which has the characteristics of being easy to implement. As a specific example, when the outer side surface 4051 of the main body portion is in contact with the first inner peripheral surface 4032 of the second transmission worm gear 403 to realize the contact between the outer side surface 4051 of the clutch spring 405 and the first inner peripheral surface 4032 of the second transmission worm gear 403, the two end portions 4054 extend obliquely towards the outer peripheral surface direction of the second output shaft segment 4022, so that the outer side surfaces 4051 of the two end portions 4054 are spaced apart from the first inner peripheral surface 4032 of the second transmission worm gear 403, and the outer side surface 4051 of the arc portion is smoothly transitioned between the outer side surface 4051 of the main body portion and the outer side surface 4051 of the end portion 4054. As another specific example, when the inner side surface 4052 of the main body portion is in contact with the outer peripheral surface of the second output shaft segment 4022 to realize the contact between the inner side surface 4052 of the clutch spring 405 and the outer peripheral surface of the second output shaft segment 4022, the two end portions 4054 extend obliquely towards the inner peripheral surface direction of the second transmission worm gear 403, so that the inner side surfaces 4052 of the two end portions 4054 are spaced apart from the outer peripheral surface of the second output shaft segment 4022, and the inner side surface 4052 of the arc portion is smoothly transitioned between the inner side surface 4052 of the main body portion and the inner side surface 4052 of the end portion 4054.

[0121] In some embodiments, the outer side surface 4051 of the main body portion is in contact with the first inner peripheral surface 4032 of the second transmission worm gear 403, that is, the outer side surface 4051 of the main body portion is in contact with the first inner peripheral surface 4032 of the second transmission worm gear 403 to realize the contact between the outer side surface 4051 of the clutch spring 405 and the first inner peripheral surface 4032 of the second transmission worm gear 403. At this time, the inner side surface 4052 of the main body portion is spaced apart from the outer peripheral surface of the second output shaft segment 4022, which can reduce the assembly difficulty.

[0122] In some embodiments, the inner side surface 4052 of the main body portion is in contact with the outer peripheral surface of the second output shaft segment 4022, that is, the inner side surface 4052 of the main body portion is in contact with the outer peripheral surface of the second output shaft segment 4022 to realize the contact between the inner side surface 4052 of the clutch spring 405 and the outer peripheral surface of the second output shaft segment 4022. The outer side surface 4051 of the main body portion is spaced apart from the first inner peripheral surface 4032 of the second transmission worm gear 403, which can reduce the assembly difficulty.

[0123] In specific implementation, the width of the first convex portion 4034 is generally matched with the width of the fracture 4053. That is to say, when the first convex portion 4034 is inserted into the fracture 4053, the first convex portion 4034 is clamped between the two end portions 4054. Similarly, the width of the second convex portion 4028 is generally matched with the width of the fracture 4053. That is to say, when the second convex portion 4028 is inserted into the fracture 4053, the second convex portion 4028 is clamped between the two end portions 4054.

[0124] In some embodiments, as Figure 35 and Figure 38 shown, the output shaft 402 includes a third output shaft segment 4025 and a fourth output shaft segment 4024 respectively located on both sides of the second output shaft segment 4022, and the second transmission worm wheel 403 is rotatably supported on the third output shaft segment 4025 and the fourth output shaft segment 4024. By supporting the second transmission worm wheel 403 through the third output shaft segment 4025 and the fourth output shaft segment 4024, concentric and stable pivoting connection between the second transmission worm wheel 403 and the output shaft 402 can be achieved, which can ensure the stability of the friction force between the second transmission worm wheel 403 and the clutch spring 405. In specific implementation, the inner peripheral surfaces at both ends of the central hole of the second transmission worm wheel 403 are respectively matched with the third output shaft segment 4025 and the fourth output shaft segment 4024, so that the second transmission worm wheel 403 is rotatably supported on the third output shaft segment 4025 and the fourth output shaft segment 4024, and the axial position of the inner peripheral surface in the middle section of the central hole of the second transmission worm wheel 403 corresponds to the circumferential position of the clutch spring 405.

[0125] In some embodiments, a first axial limiting surface is provided on the third output shaft segment 4025, and a second axial limiting surface is provided on the second transmission worm wheel 403. The first axial limiting surface and the second axial limiting surface are respectively located on both sides of the clutch spring 405, and the first axial limiting surface and the second axial limiting surface are used to axially limit the clutch spring 405. Using the first axial limiting surface and the second axial limiting surface to limit the axial position of the clutch spring 405 helps to ensure the stable operation of the clutch structure.

[0126] In specific implementation, as Figure 39 and Figure 40 shown, the second transmission worm wheel 403 can be made of an integral metal part. As Figure 41 and Figure 42As shown, a support sleeve 406 can also be connected to the second drive worm gear 403. A positioning groove 4035 is provided at one end of the second drive worm gear 403. The support sleeve 406 includes a sleeve body 4061 and positioning teeth 4062 provided on the outer periphery of the sleeve body 4061. The outer peripheral surface of the sleeve body 4061 cooperates with the inner peripheral surface at one end of the second drive worm gear 403, and the positioning teeth 4062 cooperate with the positioning groove 4035 to achieve the positioning connection between the support sleeve 406 and the second drive worm gear 403. The inner peripheral surface of the sleeve body 4061 is the second support surface 4063 for cooperating with the outer peripheral surface of the fourth output shaft section 4024. The second drive worm gear 403 can be made of metal, and the support sleeve 406 can be made of plastic. The support sleeve 406 made of plastic has the characteristics of light weight and low cost. The second drive worm gear 403 made of metal is likely to cause wear to the output shaft 402 made of plastic, while the wear between the support sleeve 406 made of plastic and the output shaft 402 made of plastic is smaller and the friction force is more stable. The end face of the sleeve body 4061 on the side of the clutch spring 405 is the second axial limiting surface. Obviously, in specific implementation, the second support surface for cooperating with the outer peripheral surface of the fourth output shaft section 4024 can also be directly provided on the second drive worm gear 403.

[0127] In some embodiments, as Figure 7 、such as Figure 20 、 Figure 21 、 Figure 24 、 Figure 25 and Figure 38 shown, an insertion notch 309 extending upward from the lower edge of the upper housing 3 is provided on the upper housing 3. An installation seat 401 is detachably inserted in the insertion notch 309. A support hole 4012 is provided on the installation seat 401. The output shaft 402 includes a fifth output shaft section 4023 rotatably supported in the support hole 4012. By providing the installation seat 401, the limitation on the structure of the driver housing can be reduced. The support hole 4012 being a full-circle structure increases the support strength. The split design of the installation seat 401 and the upper housing 3 reduces the manufacturing difficulty of the upper housing 3 mold, and the parting surface between the upper housing 3 and the lower housing 2 can be made lower, which helps to ensure the waterproof performance of the driver.

[0128] Furthermore, the installation seat 401 includes an annular seat body 4011, a wall portion 4015 connected to the lower side of the annular seat body 4011, and a plug-in portion 4016 provided on the outer periphery of the wall portion 4015 and the annular seat body 4011. The support hole 4012 is provided in the annular seat body 4011. An embedding groove 3010 is provided at the insertion notch 309, and the plug-in portion 4016 is inserted into the embedding groove 3010 to limit the position of the installation seat 401 in the axial direction of the second axis 400. For the convenience of installation and positioning, the wall portion 4015 is set to have a structure with a gradually increasing width from top to bottom, and inclined surfaces 3011 matching the front and rear side surfaces of the wall portion 4015 are provided at the lower part of the insertion notch 309.

[0129] In specific implementation, the upper part of the insertion notch 309 is a third semi-circular groove, and the lower part of the insertion notch 309 is an opening structure with a gradually increasing width. The upper part of the annular seat body 4011 is fitted with the third semi-circular groove, and the wall part 4015 is fitted with the opening structure.

[0130] In some embodiments, such as Figure 20 、 Figure 21 、 38 and Figure 39 shown, a rotation range limiting structure is provided between the output shaft 402 and the mounting seat 401. The rotation range limiting structure is used to limit the rotation range of the output shaft 402 relative to the mounting seat 401. As a specific example, a third convex part 4027 protruding radially is provided on the output shaft 402, and third limiting surfaces 4014 respectively located on both sides of the third convex part 4027 in the circumferential direction are provided on the mounting seat 401. The two third limiting surfaces 4014 respectively limit the stroke stop points of the third convex part 4027 in two directions, thereby limiting the rotation range of the output shaft 402 relative to the mounting seat 401. In specific implementation, two symmetric third convex parts 4027 can be provided on the output shaft 402, and two third limiting surfaces 4014 are provided on the mounting seat 401 corresponding to each third convex part 4027.

[0131] In some embodiments, an axial limiting structure for preventing the axial movement of the output shaft 402 is provided between the mounting seat 401 and the upper housing 3. By providing this axial limiting structure, the stable operation of the output shaft 402 can be ensured.

[0132] As a specific example, such as Figure 20 and Figure 38 shown, the axial limiting structure includes a seat body step surface 4013 provided on the mounting seat 401 and a sixth output shaft section 4026 provided on the output shaft 402. One end surface of the sixth output shaft section 4026 contacts the bottom surface of the seat body step surface 4013 to achieve axial limiting between the output shaft 402 and the mounting seat 401 in one direction.

[0133] In specific implementation, such as Figure 7 、 Figure 20 、 Figure 24 and Figure 25 shown, the contact or clearance fit between one end surface of the second driving worm wheel 403 and the other end surface of the sixth output shaft section 4026, the contact or clearance fit between the other end surface of the second driving worm wheel 403 and one end surface of the carbon brush arm 404, and the contact or clearance fit between the other end surface of the carbon brush arm 404 and the first limiting surface 308 can be utilized to achieve axial limiting of the output shaft 402 in the other direction.

[0134] More specifically, the fourth output shaft segment 4024 of the output shaft 402 forms an axial hole matching relationship with the second semicircular groove 307 of the upper cover, and the fifth output shaft segment 4023 of the output shaft 402 forms an axial hole matching relationship with the support hole 4012 provided on the mounting seat 401. The upper shell 3 and the lower shell 2 are rigidly connected as a whole by screws 18, and the mounting seat 401 is clamped between the upper shell 3 and the lower shell 2. The output shaft 402 utilizes the above two axial hole matching relationships to support its rotation around the second axis 400.

[0135] In some embodiments, Figure 20 , Figures 38 to 43 As shown, the driver further includes a carbon brush arm 404 circumferentially fixedly connected to the output shaft 402, and a deflecting pin 4043 for deflecting the carbon brush slider 808 is provided on the carbon brush arm 404. In a specific implementation, the carbon brush arm 404 can be installed on the fourth output shaft segment 4024, and the carbon brush arm 404 includes a carbon brush arm body 4041, an extension 4042 radially extending from the carbon brush arm body 4041, and a deflecting pin 4043 provided on the extension 4042. A keyway 4044 is provided in the carbon brush arm body 4041, and a fourth protrusion 4029 for matching with the keyway 4044 is provided on the fourth output shaft segment 4024. The inner circumferential surface of the carbon brush arm body 4041 matches with the outer circumferential surface of the fourth output shaft segment 4024, and the fourth protrusion 4029 is inserted into the keyway 4044, so as to realize the circumferential fixed connection between the carbon brush arm body 4041 and the fourth output shaft segment 4024. When in use, the push pin 4043 is used to form a pin-slot match with the push slot 809 of the carbon brush slider 808 of the driver. When the output shaft 402 rotates forward and reverse, the push pin 4043 on the carbon brush arm 404 rotates and swings with the output shaft 402. The push pin 4043 drives the carbon brush slider 808 and the second carbon brush 8011 to perform reciprocating linear motion, and the linear sliding positioner starts to work, realizing the potential feedback of the rotation angle position signal of the output shaft 402.

[0136] In specific implementation, Figure 7 , Figure 8 , Figure 20 , Figures 38 to 43 As shown, the carbon brush arm 404 is limited between the second transmission worm wheel 403 and the first limiting surface 308 of the driver housing, and the carbon brush arm 404 forms an axial and circumferential rigid connection with the output shaft 402. In other words, the second transmission worm wheel 403 is indirectly axially supported on the driver housing through the carbon brush arm 404, and when the mounting seat 401 is fixedly mounted on the driver housing, the carbon brush arm 404, the second transmission worm wheel 403 and the output shaft 402 are axially limited between the driver housing and the mounting seat 401, and the clutch spring 405 is axially limited between the second transmission worm wheel 403 and the output shaft 402.

[0137] As a specific example, Figure 20 ,Figures 35 to 38 As shown, the first output shaft segment 4021 is located at one end of the output shaft 402, and the fourth output shaft segment 4024 is located at the other end of the output shaft 402. The first output shaft segment 4021, the fifth output shaft segment 4023, the sixth output shaft segment 4026, the third output shaft segment 4025, the second output shaft segment 4022, and the fourth output shaft segment 4024 are connected in sequence. The outer diameter of the sixth output shaft segment 4026 is greater than the outer diameter of the fifth output shaft segment 4023, the outer diameter of the first output shaft segment 4021 is less than the outer diameter of the fifth output shaft segment 4023, the outer diameter of the sixth output shaft segment 4026 is greater than the outer diameter of the third output shaft segment 4025, the outer diameter of the third output shaft segment 4025 is greater than the outer diameter of the second output shaft segment 4022, the outer diameter of the second output shaft segment 4022 is greater than the outer diameter of the fourth output shaft segment 4024. The third convex portion 4027 is provided on the outside of the sixth output shaft segment 4026. The step surface between the third output shaft segment 4025 and the second output shaft segment 4022 is the first axial limiting surface, and the first axial limiting surface axially limits the clutch spring 405. By adopting the above output shaft 402, through reasonably setting the stepped structure of the output rotating shaft, it helps to form reasonable axial limitation and also has the characteristic of being easy to assemble.

[0138] As a specific example, as Figure 6 、 Figures 35 to 43 shown, the mounting base 401, the output shaft 402, the second driving worm wheel 403, the support sleeve 406, the clutch spring 405, and the carbon brush arm 404 can be assembled into an output shaft assembly 4, which is installed as a whole and has the characteristic of being easy to assemble.

[0139] In some embodiments, a pin hole 301 coaxial with the output shaft 402 is provided on the upper housing 3. The pin hole 301 is used for hinging with the rearview mirror 100 mirror bracket or the rearview mirror 100 mirror housing. In specific implementation, the pin hole 301 and the output shaft 402 are respectively arranged on both sides of the upper housing 3. One side of the rearview mirror 100 mirror bracket is connected to the output shaft 402, and the other side of the rearview mirror 100 mirror bracket is hinged to the pin hole 301 through a pin shaft, so that the rearview mirror 100 mirror bracket can be installed on the driver, and moreover, the rearview mirror bracket can rotate around the second axis 400.

[0140] In some embodiments, as Figure 6 、 Figure 7 、 Figure 8 、 Figure 10 、 Figures 22 to 25 shown, the driver further includes a circuit board assembly 8 installed in the cavity. The position of the circuit board assembly 8 in the up-down direction is not lower than the position of the parting surface between the upper housing 3 and the lower housing 2 in the up-down direction. By adopting the above technical solution, it can prevent the circuit board assembly 8 from getting water.

[0141] In some embodiments, the circuit board assembly 8 includes a circuit board 801 having an arc-shaped carbon film 8010 disposed on its lower side, and a linear carbon film disposed on the upper side of the circuit board 801; the arc-shaped carbon film 8010 and the first carbon brush 1002 form an annular sliding potentiometer for potential feedback of the left and right angular position signals of the driver. The linear carbon film and the second carbon brush 8011 form a linear sliding potentiometer for potential feedback of the up and down angular position signals of the driver. By reasonably setting the structure of the circuit board 801, the position of the circuit board assembly 8 can be better set at a position not lower than the parting surface between the upper housing 3 and the lower housing 2.

[0142] In some embodiments, the circuit board assembly 8 further includes a carbon brush slider 808 directly or indirectly connected to the circuit board 801 in a manner that can slide along the length direction of the linear carbon film. The carbon brush slider 808 is provided with a second carbon brush 8011 that contacts the linear carbon film. In a specific implementation, the carbon brush slider 808 is provided with a slot 809 that cooperates with the dial pin 4043.

[0143] In a specific implementation, the circuit board assembly 8 further includes a carbon brush bracket 806 and a guide shaft 807. The carbon brush bracket 806 is provided with a plurality of connecting columns 8013, and the plurality of connecting columns 8013 are respectively assembled, positioned, and hot riveted to a plurality of third connecting holes 8012 on the circuit board 801. Both ends of the guide shaft 807 are respectively installed in the shaft head mounting slots 8014 on the front and rear side walls of the carbon brush bracket 806. The carbon brush slider 808 is pivotally sleeved on the guide shaft 807, and the second carbon brush 8011 is hot fixed to the upper carbon brush slider 808 through a positioning post. A strip-shaped support portion 8015 for supporting the carbon brush slider 808 is provided on the bottom wall of the carbon brush bracket 806 opposite to the linear carbon film. The strip-shaped support portion 8015 is used to ensure the contact between the second carbon brush 8011 and the linear carbon film, and the second carbon brush 8011 elastically contacts the linear carbon film of the circuit board 801 to form a linear sliding potentiometer. The carbon brush arm 404, the carbon brush slider 808, the carbon brush bracket 806, and the guide shaft 807 form a crank-slider mechanism for converting the rotational motion of the output shaft 402 into the linear motion of the second carbon brush 8011.

[0144] As a specific example, the circuit board 801 is provided with two pairs of pins 803. One pair of pins 803 is electrically connected to the first motor 6 to conduct the first motor 6 and the circuit board 801, and the other pair of pins 803 is electrically connected to the second motor 5 to conduct the second motor 5 and the circuit board 801. The circuit board 801 is further provided with a set of pins 802, and the set of pins 802 is located in the wire insertion port 3020 of the upper housing 3 to form an interface.

[0145] As a specific example, a circuit board center hole 805 for the mandrel 1 to pass through is provided on the circuit board 801. A plurality of circuit board positioning holes 804 are also provided on the circuit board 801. The plurality of circuit board positioning holes 804 are respectively engaged with a plurality of second positioning posts 3013 in the upper housing 3. A plurality of first support surfaces 209 for supporting the lower side of the circuit board 801 are provided on the lower housing 2, and a plurality of second support surfaces 3012 for supporting the upper side of the circuit board 801 are provided on the upper housing 3.

[0146] According to the previous descriptions of the first transmission mechanism and the second transmission mechanism, by optimizing the structures of the first transmission mechanism and the second transmission mechanism, the arrangement difficulty and the assembly difficulty can be reduced. In particular, by providing the mounting bracket 701, the arrangement difficulty and the assembly difficulty can be reduced.

[0147] As Figures 6 to 8 shown, Figures 17 to 19 , Figures 26 to 34 shown, in order to further reduce the arrangement difficulty and the assembly difficulty, a fourth semi-circular groove 7011 is provided at the top of the mounting bracket 701, a first semi-circular groove 2011 is provided on the lower housing 2, and both ends of the first intermediate shaft 7021 are respectively installed in the fourth semi-circular groove 7011 and the first semi-circular groove 2011. A second limiting portion 3016 for blocking the upper side of the end of the first intermediate shaft 7021 is provided on the upper housing 3, and the second limiting portion 3016 is used to prevent the first intermediate shaft 7021 from coming out; two seventh semi-circular grooves 7015 are provided at the top of the mounting bracket 701, and both ends of the fourth intermediate shaft 7051 are respectively installed in the two seventh semi-circular grooves 7015 through bearings. A first limiting portion 3015 is provided on the upper housing 3, and the first limiting portion 3015 limits and presses the cylindrical surface of the bearing; a first mating hole 3014 for mating with the upper end of the third intermediate shaft 7041 is provided in the upper housing 3, and a second mating hole 7014 for mating with the lower end of the third intermediate shaft 7041 is provided at the top of the mounting bracket 701. With the above technical solutions, the mounting bracket 701 can provide mounting points for the first gear assembly 702, the second gear assembly 703, the third gear assembly 704, the fourth gear assembly 705, the top pin 706 and the second spring 707, and can reduce the assembly difficulty. The first gear assembly 702, the second gear assembly 703, the third gear assembly 704, the fourth gear assembly 705, the top pin 706 and the second spring 707 can form a transmission assembly 7.

[0148] During specific implementation, in order to ensure the installation accuracy and the installation stability of the mounting bracket 701, a third positioning post 3017 for mating with the bracket positioning hole 70120 on the mounting bracket 701 is further provided on the upper housing 3, and a second limiting surface 3018 for pressing down the mounting bracket 701 is further provided on the upper housing 3.

[0149] In specific implementation, in order to reduce rotational friction and achieve axial limit, the bearing includes a bearing body 7054 that mates with the seventh semi-circular groove 7015 and a bearing flange 7055 connected to one end of the bearing body 7054. The bearing flange 7055 contacts the sixth limiting surface 7019 beside the seventh semi-circular groove 7015 to bear the axial forces of the third intermediate worm gear 7052 and the third intermediate worm 7053, ensuring that the third intermediate worm gear 7052 and the third intermediate worm 7053 can rotate smoothly. Obviously, annular bosses can also be provided at the ends of each worm gear, gear, and worm to reduce friction and achieve axial limit.

[0150] As Figure 6 , Figure 7 , Figure 19 and Figure 25 shown, by adopting the above-mentioned transmission assembly 7, components such as the transmission assembly 7, the core shaft 1, the lower housing 2, the snap ring 9, the upper annular member, the first spring 11, and the lower annular member can be assembled to form a first sub-assembly, and components such as the upper housing 3, the output shaft assembly 4, the first motor 6, the second motor 5, and the circuit board assembly 8 can be assembled to form a second sub-assembly. Then, the first sub-assembly and the second sub-assembly are correspondingly assembled and locked with screws 18 to form a complete driver.

[0151] As a preferred example, the central axes of the first motor 6 and the second motor 5 are parallel to the second axis 400. The first motor 6 and the second motor 5 are respectively located on the front side and the rear side of the core shaft 1. The first output worm 16 is fixedly connected to the motor shaft of the first motor 6, and the second output worm 17 is fixedly connected to the motor shaft of the second motor 5. The first gear assembly 702 is horizontally arranged below the first output worm 16, and the second gear assembly 703 is horizontally arranged. The third gear assembly 704 is vertically arranged, the fourth gear assembly 705 is horizontally arranged, the output shaft assembly 4 is arranged above the fourth gear assembly 705, and the vertically arranged third gear assembly 704 and the first gear assembly 702 are respectively arranged at the front side part and the rear side part of the mounting bracket 701. Adopting the above arrangement scheme has the characteristics of compact structure, reasonable layout, and easy assembly.

[0152] In specific implementation, the principle of motor power on and off control is as follows: The principle of potential comparison of a potentiometer is used to control the power on and off of the motor. When the potential value at the position of the sliding potentiometer in the driver is the same as the potential of the vehicle-mounted control potentiometer, the vehicle-mounted control system cuts off the power supply to the motor; when the potential values are different, the power supply to the motor is turned on, and the power-on direction depends on the high and low of the potential value.

[0153] As Figures 1 to 3 shown, the present invention also proposes a rearview mirror 100, including the driver as described in any one of the above.

[0154] The present invention also proposes a vehicle, including the above-mentioned rearview mirror 100.

[0155] The above embodiments are only preferred embodiments given to fully illustrate the present invention, and the protection scope of the present invention is not limited thereto. Equivalent substitutions or transformations made by those skilled in the art on the basis of the present invention are all within the protection scope of the present invention. In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics of the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification.

Claims

1. A driver, characterized in that: The invention comprises a driver body and a spindle whose central axis extends along a first axis, wherein the driver body comprises a driver housing rotatably mounted on the outer periphery of the spindle relative to the spindle, an output shaft mounted in the driver housing and whose central axis extends along a second axis, a first motor mounted in the driver housing, a second motor mounted in the driver housing, a first transmission mechanism arranged in the driver housing and transmitting between the first motor and the spindle, and a second transmission mechanism arranged in the driver housing and transmitting between the second motor and the output shaft, wherein the first motor is used to drive the driver body to rotate around the first axis relative to the spindle, the second motor is used to drive the output shaft to rotate around the second axis, the spindle is suitable for being directly or indirectly fixedly connected to a rearview mirror seat, the first axis extends in an up-down direction, the second axis is perpendicular to and intersects the first axis, a spherical crown surface suitable for cooperating with a matching hole ball pair in a lower part of a rearview mirror housing is provided on the outer surface of the lower part of the driver housing, the spherical crown surface is arranged around the first axis, and the spherical crown surface takes the intersection of the first axis and the second axis as the sphere center.

2. The driver according to claim 1, characterized in that: A spherical crown-shaped shell wall is disposed at the lower part of the driver housing, the spherical crown surface is located on the outer surface of the shell wall, and the shell wall encloses a containing space; The driver housing comprises an upper housing and a lower housing connected to the lower side of the upper housing, and the housing wall is located at the lower part of the lower housing.

3. The driver according to claim 2, characterized in that: The first motor and the second motor are both installed in a cavity surrounded by the upper shell and the lower shell, and the positions of the first motor and the second motor in the up-down direction are not lower than the positions of the parting surface between the upper shell and the lower shell in the up-down direction.

4. The driver according to claim 2, characterized in that: The bottom of the lower shell is provided with a first through hole matched with the core shaft, and the lower end of the core shaft is provided with a core shaft step surface for supporting the lower shell.

5. The driver according to claim 2, characterized in that: The core shaft is provided with a core shaft center hole which passes through the core shaft in the up and down directions, the top of the upper shell is provided with a second through hole and an annular groove surrounding the outer periphery of the second through hole, the notch of the annular groove faces downward, and the upper end of the core shaft is inserted into the annular groove.

6. The driver according to claim 2, characterized in that: The first transmission mechanism includes a first output worm connected to the output end of the first motor, a first intermediate worm wheel meshing with the first output worm, a first intermediate gear coaxial with the first intermediate worm wheel and rotating synchronously, a second intermediate gear meshing with the first intermediate gear, a first intermediate worm coaxial with the second intermediate gear and rotating synchronously, and a first transmission worm wheel connected to the periphery of the core shaft, and the first intermediate worm is meshed with the first transmission worm wheel.

7. The driver according to claim 6, characterized in that: The driver further comprises a second intermediate shaft, a second spring and a tensioning pin, the second intermediate gear and the first intermediate worm are both loosely sleeved on the second intermediate shaft, the second spring applies an elastic force to the tensioning pin, and the tensioning pin is adapted to tension the second intermediate shaft in a radial direction of the second intermediate shaft under the action of the elastic force, so as to apply a first pre-tightening force to the second intermediate shaft so as to pre-tighten the second intermediate shaft toward one side of the first transmission worm gear; The invention also includes a third spring which acts on the first intermediate worm directly or indirectly, and the third spring applies a second pre-tightening force to the first intermediate worm so as to pre-tighten the first intermediate worm toward its own axial direction.

8. The driver according to claim 7, characterized in that: A detachable mounting bracket is provided in the driver housing, and the second intermediate shaft, the second spring and the tensioning pin are all installed in the mounting bracket; The mounting bracket is provided with a displacement space for the second intermediate shaft to be displaced toward the first transmission worm gear under the action of the first preload force.

9. The driver according to claim 6, characterized in that: The first transmission mechanism further includes a first clutch structure, and the first transmission worm gear is connected to the mandrel through the first clutch structure; The first clutch structure includes a clamping ring, an upper ring, a first spring and a lower ring, which are arranged in sequence from top to bottom, and the upper ring, the first spring, the lower ring and the first transmission worm gear are all sleeved on the periphery of the core shaft, the clamping ring is clamped on the core shaft, the upper ring is supported on the clamping ring upwards, the first transmission worm gear is supported on the lower shell downwards, and the lower ring is supported on the first transmission worm gear downwards, the upper end of the first spring pushes the upper ring upwards, and the lower end of the first spring pushes the lower ring downwards, the lower ring is fixedly connected to the core shaft circumferentially and axially slidably connected, a separable bite structure is provided between the lower ring and the first transmission worm gear, and when the rotational torque of the first transmission worm gear relative to the lower ring is greater than a preset value, the bite structure is separated to enable the first transmission worm gear to rotate relative to the core shaft.

10. The driver according to claim 9, characterized in that: The engaging structure comprises a trapezoidal boss provided on the first transmission worm gear and a trapezoidal groove provided on the lower annular member, wherein the width of the trapezoidal boss in the circumferential direction of the first transmission worm gear gradually decreases from bottom to top, and the trapezoidal groove cooperates with the trapezoidal boss; The upper annular member is circumferentially fixedly connected to the core shaft and axially slidably connected thereto, and a first carbon brush is mounted on the upper annular member; An accommodation space for accommodating the lower annular member and the first spring is formed between the first transmission worm gear and the core shaft.

11. The driver according to claim 2, characterized in that: The second transmission mechanism includes a second output worm connected to the output end of the second motor, a second intermediate worm gear meshing with the second output worm, a second intermediate worm gear coaxial with and synchronously rotating with the second intermediate worm gear, a third intermediate worm gear meshing with the second intermediate worm gear, a third intermediate worm gear coaxial with and synchronously rotating with the third intermediate worm gear, and a second transmission worm gear connected to the periphery of the output shaft, and the third intermediate worm gear meshing with the second transmission worm gear.

12. The driver according to claim 11, characterized in that The second transmission mechanism further includes a second clutch structure, and the second transmission worm gear is connected to the output shaft via the second clutch structure; The second clutch structure includes a clutch spring, the output shaft includes a first output shaft segment and a second output shaft segment, the first output shaft segment is used to connect with a rearview mirror bracket or a rearview mirror housing, the second transmission worm gear is loosely sleeved on the second output shaft segment, and the clutch spring is an annular structure with a break; The inner side surface of the clutch spring contacts the outer peripheral surface of the second output shaft segment, and the second transmission worm gear is provided with a first protrusion inserted into the fracture. Alternatively, the outer side surface of the clutch spring contacts the inner circumferential surface of the second transmission worm gear, and the second output shaft segment is provided with a second protrusion inserted into the fracture.

13. The driver according to claim 12, characterized in that: The clutch spring comprises a main body and two ends respectively located on both sides of the fracture; The inner side surface of the main body part contacts the outer peripheral surface of the second output section, the inner side surfaces of the two end parts are spaced apart from the outer peripheral surface of the second output shaft section, and the inner side surfaces of the two end parts are smoothly transitioned to the inner side surface of the main body part. Alternatively, the outer side surface of the main body contacts the inner circumference of the second transmission worm gear, the outer side surfaces of the two end portions are spaced apart from the inner circumference of the second transmission worm gear, and there is a smooth transition between the outer side surfaces of the two end portions and the outer side surface of the main body.

14. The driver according to claim 12, characterized in that: The upper shell is provided with an insertion notch extending upward from the lower edge of the upper shell, a mounting seat is detachably inserted in the insertion notch, a supporting hole is provided on the mounting seat, and the output shaft includes a fifth shaft segment rotatably supported in the supporting hole; A rotation range limiting structure is provided between the output shaft and the mounting seat, and the rotation range limiting structure is used to limit the rotation range of the output shaft relative to the mounting seat; An axial limiting structure for preventing the output shaft from axially moving is provided between the mounting seat and the upper housing; The driver also includes a carbon brush arm fixedly connected to the output shaft in a circumferential direction, and a prying pin for prying the carbon brush slider is arranged on the carbon brush wall.

15. The driver according to claim 2, characterized in that: The upper shell is provided with a pin hole coaxially arranged with the output shaft, and the pin hole is used for hinged connection with a rearview mirror bracket or a rearview mirror housing.

16. The driver according to claim 2, characterized in that: The driver further comprises a circuit board assembly installed in the cavity, wherein the position of the circuit board assembly in the vertical direction is not lower than the position of the parting surface between the upper shell and the lower shell in the vertical direction; The circuit board assembly comprises a circuit board with an arc-shaped carbon film on the lower side, and a straight carbon film on the upper side of the circuit board; The circuit board assembly also includes a carbon brush slider directly or indirectly connected to the circuit board in a manner that it can slide along the length direction of the linear carbon film, and the carbon brush slider is provided with a second carbon brush that contacts the linear carbon film.

17. A rearview mirror, characterized in that: Comprising the driver according to any one of claims 1-16.

18. A vehicle, characterized in that: Including the rearview mirror as claimed in claim 17.

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