Vehicle-mounted camera rotation protection device

Abstract

The utility model relates to a vehicle-mounted camera rotation protection device, which comprises a shell, a driving mechanism, a transmission gear set, a rotation output assembly, a shaft supporting assembly, a protection cover body and a position limiting mechanism, and is characterized in that the driving mechanism comprises a motor and a driving transmission part driven by an output shaft of the motor; the transmission gear set is composed of at least one duplicate gear. The rotary output assembly comprises an output shaft and an output gear. The protective cover body is fixedly connected to the end part of the output shaft and synchronously rotates along with the output shaft; the position limiting mechanism comprises a limiting element linked with the output gear, a first limiting part and a second limiting part, wherein the first limiting part and the second limiting part are arranged on the shell. The utility model provides a vehicle-mounted camera rotation protection device, and aims to solve the problems of insufficient protection, poor vibration resistance, low structural flexibility and the like of the conventional vehicle-mounted camera protection device. The protection performance of the camera is improved, different installation spaces are adapted, and the overall reliability is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle equipment technical field, concretely relates to a vehicle camera rotation protection device. BACKGROUND

[0002] With the rapid development of the automotive industry, vehicle cameras play an increasingly important role in safe driving, assisted driving, and intelligent driving of vehicles. However, vehicle cameras face many challenges during use, such as harsh environmental conditions (e.g. high temperature, low temperature, humidity, sand, etc.) and vibration and impact during vehicle driving, which can affect the normal operation and service life of the camera.

[0003] The existing vehicle camera protection device has some deficiencies. On the one hand, it lacks effective protection structure and cannot shield and protect the lens when the camera is not in use, which can easily cause the lens to be contaminated with dust, water stains and other pollutants, affecting the imaging quality. On the other hand, in response to vehicle vibration, the existing device often cannot well buffer and isolate vibration, so that the precise components inside the camera are easily damaged, thereby affecting the performance and reliability of the camera. In addition, the existing protection device may not be flexible in structure design, making it difficult to adapt to the installation space and use requirements of different vehicle models. Therefore, a new type of vehicle camera rotation protection device is needed to solve the above problems. SUMMARY

[0004] Therefore, the utility model provides a vehicle camera rotation protection device, aiming to solve the problems of insufficient protection, poor vibration resistance and low structural flexibility of the existing vehicle camera protection device, and improve the protection performance of the camera, adapt to different installation spaces and improve the overall reliability through rotation protection structure, shock absorption design and modular layout.

[0005] The purpose of the utility model is achieved through the following technical solutions:

[0006] A kind of vehicle camera rotation protection device, including shell, drive mechanism, transmission gear set, rotary output assembly, shaft support assembly, protective cover and position limiting mechanism, drive mechanism includes motor and by motor output shaft driven driving member;Transmission gear set is formed by at least one double gear, the double gear includes different diameters upper gear and lower gear, wherein the upper gear or lower gear of first-stage double gear is engaged with driving member;Rotary output assembly includes output shaft and the output gear fixed to output shaft, the output gear is engaged with the lower gear or upper gear of last-stage double gear of transmission gear set;Shaft support assembly includes at least two shaft sleeves arranged on transmission base, for rotatably supporting output shaft;Protective cover is fixedly connected to the end of output shaft and synchronously rotates with it;Position limiting mechanism includes limit element linked with output gear and first limit portion and second limit portion arranged on shell;Wherein, when the limit element contacts first limit portion, protective cover is at the first position of shielding camera lens;When limit element contacts second limit portion, protective cover is at the second position of exposing camera lens.

[0007] The device adopts reversible engagement structure design, forms highly flexible transmission system configuration scheme by the bidirectional engagement ability of upper and lower gears of double gear. Modular gear set design makes transmission path can be three-dimensional layout according to installation space, effectively solves the problem of limited space of vehicle-mounted equipment. The mechanical linkage design of limit mechanism and output gear builds double insurance mechanism, which realizes accurate angle control by gear engagement power transmission, eliminates cumulative error by physical limit, and ensures the positioning accuracy of protective cover in extreme temperature and high vibration environment. The multi-point support architecture of shaft support assembly combined with the adjustable characteristics of gear engagement direction can compensate for the multidirectional vibration interference generated during vehicle driving, prevent abnormal wear of gears caused by shafting deflection. The integrated design significantly optimizes the size of the device, meets the design requirements of streamlined body, and realizes energy efficiency improvement through transmission path optimization, which meets the energy saving requirements of new energy vehicles.

[0008] Preferably, the limit element is a limit sleeve fixed to the end face of the output gear, and an arc-shaped lug is arranged on the limit sleeve, and the rotation track of the arc-shaped lug corresponds to the spatial position of the first limit portion and the second limit portion.

[0009] The end surface of the limiting sleeve is fixedly connected with the output gear, ensuring that the rotation of the limiting element and the output gear is completely synchronized, avoiding the assembly error or loosening risk that may exist in the traditional independent limiting rod. The design of the arc-shaped protrusion can form surface contact instead of point contact with the limiting portion on the shell, reducing the unit area pressure and reducing wear during long-term use. As a rigid connecting component, the limiting sleeve can effectively resist the vibration transmitted by the transmission gear set in the vehicle bumping environment, avoiding the accidental disengagement of the limiting element and the limiting portion due to vibration, thereby improving the reliability of position detection. The curved surface design of the arc-shaped protrusion can avoid the stress concentration problem caused by the contact of sharp corners at the limit position, especially in high or low temperature environments, reducing the risk of deformation of the material due to thermal expansion and contraction, and being suitable for vehicle-mounted equipment in extreme climate areas.

[0010] Preferably, the first limiting portion and the second limiting portion are mechanical stops on the shell, and are arranged at a certain angle along the circumference of the output gear.

[0011] The mechanical stop is a pure physical limiting structure that does not rely on electronic sensors or circuit signals, and can still work stably in extreme temperature, humid or dusty vehicle-mounted environments. For example, in heavy rain or sandstorm weather, mechanical contact type limiting will not be mis-triggered or failed due to water vapor erosion or dust accumulation, and is especially suitable for camera protection devices installed outdoors. The rigid limiting feature can effectively resist the continuous vibration impact during vehicle driving, avoiding limiting deviation caused by vibration, and ensuring that the protective cover is always accurately parked at the shielding or exposed position. The mechanical stop does not require complex circuit design or signal feedback module, and can realize the limiting function through a simple physical structure, significantly reducing the manufacturing cost. The stopper can be directly integrated with the shell (such as injection molding process), or modularly installed through bolt fixation, adapting to the camera installation space requirements of different vehicle models. In addition, the material selection of the mechanical stop is flexible, which can use metal plating, engineering plastic or composite material, and can improve durability through surface hardening or corrosion prevention treatment, reducing wear during long-term use.

[0012] Preferably, the driving transmission member is a worm structure, which is fixed to the motor output shaft by interference fit.

[0013] The worm drive scheme has a single-stage large reduction ratio characteristic, realizing high torque output in a small space. The self-locking effect of the worm gear effectively prevents the protective cover from being accidentally opened due to vehicle bumping, improving driving safety. The interference fit process ensures zero idle travel of power transmission, significantly shortening the response time of the protective cover opening and closing action. The structure is made of special engineering plastic and metal insert composite material, which maintains good toughness in low temperature environment and avoids the risk of cold brittle fracture. The special tooth shape design significantly reduces the transmission noise, meeting the quietness requirement of high-end vehicles. The pre-stress generated by interference assembly can compensate for the size fluctuation caused by temperature change, ensuring the working stability of the transmission system in severe temperature difference environment.

[0014] Preferably, the driving mechanism is replaced by a cylindrical gear, and the motor installation orientation is adjusted to be orthogonal to the driving shaft and the transmission gear set axis.

[0015] The cylindrical gear transmission scheme provides high transmission efficiency, especially suitable for applications that need to be frequently opened and closed. The orthogonal layout optimizes space utilization, allowing the motor to be installed laterally beside the gear set, adapting to narrow and long installation space. The involute modified tooth profile design effectively compensates for installation errors and reduces meshing impact, making the protective cover opening and closing process smooth and uninterrupted. This arrangement forms a natural heat dissipation channel, ensuring temperature rise control during continuous operation. High-precision manufacturing processes combined with surface strengthening treatment significantly extend the service life of the gear. The orthogonal axis design facilitates modular maintenance, significantly reducing maintenance costs, and reserves technical interfaces for expanding manual emergency opening functions.

[0016] Preferably, the driving mechanism is installed in the housing through an elastic damping assembly, which includes a buffer pad made of rubber or silicone.

[0017] The multi-stage damping system achieves wideband vibration attenuation, and the composite elastomer structure of the buffer pad includes a honeycomb damping layer and a gradient density support layer, which can effectively filter mechanical vibrations of different frequencies. The selection of weather-resistant materials not only maintains the elasticity but also has excellent environmental resistance, significantly extending the service life. The elastic mounting structure forms a vibration isolation zone, significantly reducing the vibration intensity transmitted to the camera, ensuring clear imaging. The pre-compression design provides sufficient support stiffness while allowing installation tolerance compensation, improving the fault tolerance rate of the assembly process. This damping system can withstand continuous impact under complex road conditions through strict vibration test standards.

[0018] Preferably, the shaft support assembly includes a first shaft sleeve and a second shaft sleeve arranged axially along the output shaft.

[0019] The double-shaft sleeve support architecture forms a statically determinate support system, accurately controlling the radial runout of the output shaft. The use of self-lubricating composite materials significantly reduces the friction coefficient, maintaining stable working performance in harsh conditions. The axial spacing is dynamically optimized to effectively avoid system resonance phenomena. The inner wall lubrication structure cooperates with the end face seal design to achieve long-term maintenance-free operation. The stiffness gradient design allows the support system to absorb energy through elastic deformation when subjected to sudden impact, significantly improving impact resistance. This design significantly extends the service life of the bearing system and reduces maintenance frequency.

[0020] Preferably, it also includes a control circuit board electrically connected to the motor through wires to provide driving power and motion control signals.

[0021] The intelligent control system realizes multi-dimensional environment sensing and motion control, high-precision angle closed-loop control ensures the positioning accuracy of the protective cover, the multi-signal linkage function can intelligently adjust the opening and closing strategy of the protective cover according to the vehicle state, the redundant architecture design improves the system reliability and meets the strict functional safety standards, the power protection module can resist strong electrical interference and ensure the stable operation of the system, the high-speed communication interface realizes real-time data interaction with the vehicle-mounted system, the self-adaptive algorithm continuously optimizes the motion control parameters, and the heat conduction packaging process expands the working temperature adaptation range of the circuit board.

[0022] Preferably, the transmission gear set is composed of a single double gear; the upper gear or the lower gear of the double gear is engaged with the driving transmission member, and the lower gear or the upper gear is directly engaged with the output gear.

[0023] The simplified transmission structure significantly reduces the number of components, improves production and assembly efficiency, the adjustable speed ratio design realizes transmission characteristic optimization in a compact space, meets diversified application requirements, the integrated forming process ensures the precision of the meshing surface, effectively reduces the running noise, the self-lubricating structure design prolongs the maintenance-free period, the special phase layout balances the radial load and reduces the load of the bearing system, and the modular design reserves an expansion interface, supporting flexible upgrade and function expansion of the transmission system.

[0024] The utility model discloses compared with prior art's beneficial effect is:

[0025] The vehicle-mounted camera rotating protection device adopts reversible meshing structure design, forms a highly flexible transmission system configuration scheme through the bidirectional meshing capability of the upper and lower gears of the double gear, the modular gear set design enables the transmission path to be arranged in three dimensions according to the installation space, effectively solving the problem of limited space of the vehicle-mounted equipment, the mechanical linkage design of the limiting mechanism and the output gear builds a double insurance mechanism, which realizes accurate angle control through gear meshing power transmission and eliminates cumulative error through physical limiting, ensuring the positioning accuracy of the protective cover in extreme temperature and high vibration environment, the multi-point support architecture of the shaft support assembly combined with the adjustable characteristics of the gear meshing direction can compensate for the multidirectional vibration interference generated during vehicle driving, preventing abnormal wear of the gear caused by shafting deflection. The integrated design significantly optimizes the device size, meets the design requirements of the streamlined body, and realizes energy efficiency improvement through transmission path optimization, meeting the energy saving requirements of new energy vehicles. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments, it should be understood that the following drawings only show some embodiments of the present application, therefore should not be regarded as a limitation on the scope, for those skilled in the art, on the premise of not paying creative labor, other related drawings can also be obtained according to these drawings.

[0027] Figure 1 It is the outline drawing of the vehicle-mounted camera rotating protection device of one embodiment of the utility model.

[0028] Figure 2 It is the partial structure drawing of the vehicle-mounted camera rotating protection device of one embodiment of the utility model.

[0029] Figure 3 It is the partial structure drawing of the vehicle-mounted camera rotating protection device of one embodiment of the utility model.

[0030] Figure 4 It is Figure 3 It is the enlarged view of area A.

[0031] Figure 5 It is the sectional view of the vehicle-mounted camera rotating protection device of one embodiment of the utility model.

[0032] Label explanation:

[0033] The shell (1), the driving mechanism (2), the motor (21), the driving member (22), the transmission gear set (3), the upper gear (31), the lower gear (32), the rotation output assembly (4), the output shaft (41), the output gear (42), the shaft support assembly (5), the first shaft sleeve (51), the second shaft sleeve (52), the protective cover (6), the position limiting mechanism (7), the limiting element (71), the arc-shaped lug (711), the first limiting part (72), the second limiting part (73), the camera lens (01). Specific implementation

[0034] In order to make the purpose, technical scheme and advantage of the embodiments of the present application more clear, the technical scheme of the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0036] It should be noted that similar reference numerals and letters refer to similar items throughout the accompanying drawings, and therefore, once an item is defined in one drawing, it is not necessary to further define and explain it in subsequent drawings. In the description of the embodiments of the present application, it should be understood that the terms "upper", "lower", "left", "right", "vertical", "horizontal", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly understood by those skilled in the art, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0037] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0038] The technical solutions in the present application will be described below with reference to the accompanying drawings.

[0039] The present embodiment provides a kind of vehicle camera rotation protection device, including shell 1, drive mechanism 2, transmission gear set 3, rotating output assembly 4, shaft support assembly 5, protective cover 6 and position limiting mechanism 7, drive mechanism 2 includes motor 21 and by the driving member 22 of motor 21 output shaft;Transmission gear set 3 is made of two double gear, double gear includes different diameters upper gear 31 and lower gear 32, wherein the lower gear 32 of first double gear is engaged with driving member 22;Rotating output assembly 4 includes output shaft 41 and is fixed to the output gear 42 of output shaft 41, output gear 42 is engaged with the lower gear 32 of last double gear of transmission gear set 3;Shaft support assembly 5 contains two shaft sleeves arranged on transmission base, for rotatably supporting output shaft 41;Protective cover 6 is fixedly connected to the end of output shaft 41 and synchronously rotates with it;Position limiting mechanism 7 includes limit element 71 linked with output gear 42 and first limit part 72 and second limit part 73 arranged on shell 1;Wherein, when limit element 71 contacts first limit part 72, protective cover 6 is in the first position of shielding camera lens 01;When limit element 71 contacts second limit part 73, protective cover 6 is in the second position of exposing camera lens 01.

[0040] The device adopts a reversible meshing structure design. Through the bidirectional meshing capability of the upper and lower gears of the double gear, a highly flexible transmission system configuration scheme is formed. The modular gear set design enables the transmission path to be arranged in three dimensions according to the installation space, effectively solving the problem of limited space for vehicle-mounted equipment. The mechanical linkage design of the limiting mechanism and the output gear builds a double insurance mechanism, which not only realizes accurate angle control through gear meshing power transmission, but also eliminates cumulative errors through physical limiting, ensuring the positioning accuracy of the protective cover in extreme temperature and high vibration environments. The multi-point support architecture of the shaft support assembly 5 combined with the adjustable characteristics of the gear meshing direction can compensate for the multi-directional vibration interference generated during vehicle driving, preventing abnormal wear of the gears caused by shaft system deflection. This integrated design significantly optimizes the device size, meeting the needs of streamlined vehicle body design, while optimizing the transmission path to improve energy efficiency, meeting the energy-saving requirements of new energy vehicles.

[0041] In this embodiment, the limiting element 71 is a limiting sleeve fixed to the end face of the output gear 42. The limiting sleeve is provided with an arc-shaped protrusion, and the rotation track of the arc-shaped protrusion corresponds to the spatial position of the first limiting part 72 and the second limiting part 73.

[0042] The limiting sleeve is fixedly connected with the end face of the output gear 42, ensuring that the limiting element 71 and the output gear 42 rotate completely synchronously, avoiding the assembly error or loosening risk that may exist in traditional independent limiting rods. The design of the arc-shaped protrusion can form a surface contact with the limiting part on the housing instead of a point contact, reducing the unit area pressure and reducing wear during long-term use. The limiting sleeve as a rigid connection component can effectively resist the vibration transmitted by the transmission gear set in the vehicle-mounted bumpy environment, avoiding the accidental disengagement of the limiting element 71 and the limiting part due to vibration, thereby improving the reliability of position detection. The curved surface design of the arc-shaped protrusion can avoid the stress concentration problem caused by the contact of sharp corners at the limit position, especially in high or low temperature environments, reducing the risk of deformation of materials due to thermal expansion and contraction, suitable for vehicle-mounted equipment in extreme climate areas.

[0043] In this embodiment, the first limiting part 72 and the second limiting part 73 are mechanical stops on the housing 1, and are arranged at an angle along the circumference of the output gear 42.

[0044] The mechanical stopper, as a pure physical limiting structure, does not need to rely on electronic sensors or circuit signals and can still work stably in an extreme temperature, humid, or dusty vehicle-mounted environment. For example, in a rainstorm or sandstorm, the mechanical contact limiting will not be triggered or failed due to water vapor erosion or dust accumulation, and is particularly suitable for camera protection devices installed outdoors. The rigid limiting characteristic can effectively resist the continuous vibration impact during vehicle driving, avoid limiting deviation caused by vibration, and ensure that the protective cover is always accurately parked at the shielding or exposed position. The mechanical stopper does not need complex circuit design or signal feedback module, and can realize the limiting function only through a simple physical structure, thereby significantly reducing the manufacturing cost. The stopper can be directly integrated with the shell by, for example, injection molding process, or be modularly installed through bolt fixation to adapt to the camera mounting space requirements of different vehicle models. In addition, the material selection of the mechanical stopper is flexible, and metal plating, engineering plastic, or composite material can be used to improve durability through surface hardening or corrosion prevention treatment and reduce wear during long-term use.

[0045] In the embodiment, the driving member 22 is a worm structure fixed to the output shaft of the motor 21 by interference fit.

[0046] The worm drive scheme has a single-stage large reduction ratio characteristic, and can realize high torque output in a small space. The self-locking effect of the worm gear effectively prevents the protective cover from being accidentally opened due to vehicle jolt, and improves the driving safety. The interference fit process ensures zero idle travel of power transmission, significantly shortens the response time of the protective cover opening and closing action. The structure is made of special engineering plastic and metal insert composite material, which maintains good toughness in low temperature environment and avoids the risk of cold brittle fracture. The special tooth shape design significantly reduces the transmission noise, meeting the silent requirement of high-end vehicles. The pre-stress generated by interference assembly can compensate for the size fluctuation caused by temperature change, ensuring the working stability of the transmission system in a severe temperature difference environment.

[0047] In other embodiments, the driving member 22 is replaced by a cylindrical gear, and the installation orientation of the motor 21 is adjusted to be orthogonal to the driving shaft and the transmission gear set 3.

[0048] The cylindrical gear transmission scheme provides high transmission efficiency, and is particularly suitable for applications that need to be frequently opened and closed. The orthogonal layout optimizes the space utilization, so that the motor can be installed laterally beside the gear set, adapting to the long and narrow installation space. The involute modified tooth profile design effectively compensates for the installation error and reduces the meshing impact, making the protective cover opening and closing process smooth without jerk. This arrangement forms a natural heat dissipation channel to ensure temperature rise control during continuous operation. High-precision manufacturing process combined with surface strengthening treatment significantly prolongs the service life of the gear. The orthogonal axis design facilitates modular maintenance, significantly reduces maintenance cost, and reserves technical interfaces for expanding the manual emergency opening function.

[0049] In the present embodiment, the driving mechanism 2 is mounted to the housing 1 through an elastic damping assembly, which comprises a cushion pad made of rubber or silicone.

[0050] The multi-stage damping system achieves broadband vibration attenuation. The composite elastomer structure of the cushion pad comprises a honeycomb damping layer and a gradient density support layer, which can effectively filter mechanical vibrations of different frequencies. The weather-resistant material has excellent environmental resistance while maintaining its elasticity, significantly extending its service life. The elastic mounting structure forms a vibration isolation zone, significantly reducing the vibration intensity transmitted to the camera and ensuring clear imaging. The pre-compression design provides sufficient support stiffness while allowing for installation tolerance compensation, improving the fault tolerance of the assembly process. The damping system can withstand continuous impacts under complex road conditions through strict vibration test standards.

[0051] In the present embodiment, the shaft support assembly 5 comprises a first shaft sleeve 51 and a second shaft sleeve 52 arranged axially along the output shaft 41.

[0052] The double-sleeve support architecture forms a statically determinate support system, accurately controlling the radial runout of the output shaft. The use of self-lubricating composite materials significantly reduces the friction coefficient, maintaining stable performance in harsh working conditions. The axial spacing is dynamically optimized to effectively avoid system resonance phenomena. The inner wall lubrication structure cooperates with the end face seal design to achieve long-term maintenance-free operation. The stiffness gradient design enables the support system to absorb energy through elastic deformation when subjected to sudden impacts, significantly improving impact resistance. This design significantly extends the service life of the bearing system and reduces maintenance frequency.

[0053] In the present embodiment, a control circuit board is also included, which is electrically connected to the motor 21 through wires to provide driving power and motion control signals.

[0054] The intelligent control system achieves multi-dimensional environmental perception and motion control, with high-precision angle closed-loop control ensuring accurate positioning of the protective cover. The multi-signal linkage function can intelligently adjust the opening and closing strategy of the protective cover according to the vehicle state. The redundant architecture design improves system reliability, meeting strict functional safety standards. The power protection module can withstand strong electrical interference, ensuring stable system operation. The high-speed communication interface enables real-time data interaction with the vehicle system, and the adaptive algorithm continuously optimizes motion control parameters. The heat dissipation packaging process expands the operating temperature range of the circuit board.

[0055] In other embodiments, the transmission gear set 3 can be composed of a single double gear. The upper gear 31 or lower gear 32 of the double gear is engaged with the driving member 22, and the lower gear 32 or upper gear 31 is directly engaged with the output gear 42.

[0056] The simplified transmission structure significantly reduces the number of components and improves production and assembly efficiency. The adjustable speed ratio design realizes transmission characteristic optimization in a compact space and meets diversified application requirements. The integrated forming process ensures the precision of the meshing surface and effectively reduces the running noise. The self-lubricating structure design prolongs the maintenance-free period, the special phase layout balances the radial load, and reduces the bearing system load. The modular design reserves an expansion interface, supports flexible upgrade and function expansion of the transmission system.

[0057] Although the embodiments of the present application have been shown and described, it should be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A vehicle-mounted camera rotation protection device, characterized in that, include: Shell (1); The drive mechanism (2) includes a motor (21) and an active transmission component (22) driven by the output shaft of the motor (21). The transmission gear set (3) is composed of at least one double gear, which includes an upper gear (31) and a lower gear (32) of different diameters, wherein the upper gear (31) or the lower gear (32) of the first-stage double gear meshes with the driving transmission member (22); The rotary output assembly (4) includes an output shaft (41) and an output gear (42) fixed to the output shaft (41), wherein the output gear (42) meshes with the lower gear (32) or upper gear (31) of the final stage double gear of the transmission gear set (3); The shaft support assembly (5) includes at least two bushings disposed on the transmission base for rotatably supporting the output shaft (41). The protective cover (6) is fixedly connected to the end of the output shaft (41) and rotates synchronously with it; The position limiting mechanism (7) includes a limiting element (71) that is linked to the output gear (42) and a first limiting part (72) and a second limiting part (73) disposed on the housing (1). When the limiting element (71) contacts the first limiting part (72), the protective cover (6) is in the first position of covering the camera lens (01); when the limiting element (71) contacts the second limiting part (73), the protective cover (6) is in the second position of exposing the camera lens (01).

2. The vehicle-mounted camera rotation protection device according to claim 1, characterized in that, The limiting element (71) is a limiting sleeve fixed on the end face of the output gear (42). The limiting sleeve is provided with an arc-shaped protrusion (711). The rotation trajectory of the arc-shaped protrusion (711) corresponds to the spatial position of the first limiting part (72) and the second limiting part (73).

3. The vehicle-mounted camera rotation protection device according to claim 1, characterized in that, The first limiting part (72) and the second limiting part (73) are mechanical stops on the housing (1), and the two are arranged at a set angle along the circumferential direction of the output gear (42).

4. The vehicle-mounted camera rotation protection device according to claim 1, characterized in that, The active transmission component (22) is a worm gear structure, which is fixed to the output shaft of the motor (21) by an interference fit.

5. The vehicle-mounted camera rotation protection device according to claim 1, characterized in that, The active transmission component (22) is a cylindrical gear, and the motor (21) is installed in such a way that the drive axis is orthogonal to the axis of the transmission gear set (3).

6. The vehicle-mounted camera rotation protection device according to claim 1, characterized in that, The drive mechanism (2) is mounted on the housing (1) via an elastic damping component, which includes a cushioning pad made of rubber or silicone.

7. The vehicle-mounted camera rotation protection device according to claim 1, characterized in that, The shaft support assembly (5) includes a first bushing (51) and a second bushing (52) spaced apart along the output shaft (41) axially.

8. The vehicle-mounted camera rotation protection device according to claim 1, characterized in that, It also includes a control circuit board, which is electrically connected to the motor (21) via wires to provide drive power and motion control signals.

9. The vehicle-mounted camera rotation protection device according to claim 1, characterized in that, The transmission gear set (3) is composed of a single double gear; the upper gear (31) or lower gear (32) of the double gear meshes with the driving transmission component (22), and the lower gear (32) or upper gear (31) meshes directly with the output gear (42).

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