Rotary driving device, vehicle-mounted ceiling screen assembly and vehicle

Abstract

The utility model relates to a rotation driving device, a vehicle-mounted ceiling screen assembly and a vehicle, and the rotation driving device comprises a driving part, a transmission mechanism, an output rotating shaft and a connecting gasket. The transmission mechanism is in transmission connection with the driving piece and comprises an output gear, and the output gear is provided with a first sleeving part. One end of the output rotating shaft is used for being connected with equipment to be overturned, the other end of the output rotating shaft is provided with a second sleeving part, and one of the first sleeving part and the second sleeving part is sleeved outside the other one. The connecting gasket is assembled between the first sleeving part and the second sleeving part in an interference mode, and the contact area between the first sleeving part and the connecting gasket and the contact area between the second sleeving part and the connecting gasket are different. According to the rotation driving device, the technical problem that the service life of an existing rotation driving device is affected due to the fact that teeth of the existing rotation driving device are prone to being broken when the ceiling screen is subjected to large torque can be solved.

Description

Technical Field

[0001] This application relates to the technical field of in-vehicle ceiling screens, and particularly to a rotary drive device, an in-vehicle ceiling screen assembly, and a vehicle. Background Art

[0002] An in-vehicle ceiling screen is a screen device installed on the top of a vehicle to provide entertainment, information, and interaction functions for in-vehicle passengers. The in-vehicle ceiling screen is rotatably installed on the top inside the vehicle through a rotary drive device, so that it is convenient for passengers to flip open the ceiling screen when needed and flip the ceiling screen closed when not needed.

[0003] In the related art, the rotary drive device of the in-vehicle ceiling screen mainly includes a drive motor, a transmission mechanism, and an output rotating shaft. The drive motor is in transmission connection with the transmission mechanism. The transmission mechanism is in interference fit with the output rotating shaft through an output gear. The output rotating shaft is then connected to the ceiling screen, and thus the ceiling screen can be driven to flip through the drive motor.

[0004] However, in the case of direct interference fitting between the output rotating shaft and the output gear, when the ceiling screen generates a large torque under conditions such as sudden braking, sudden acceleration, passing through bumpy roads, or accidental impact of the vehicle, the output gear will bear a large torque and rotate relative to the gear it meshes with. In the case where the gear it meshes with is fixed (such as when the drive motor is self-locked to position the ceiling screen at a certain angle), the output gear is very likely to have its teeth broken, greatly affecting the service life of the output gear and the rotary drive device. Summary of the Utility Model

[0005] The embodiments of this application provide a rotary drive device to solve the technical problem that the existing rotary drive device is prone to tooth breakage when the ceiling screen is subjected to a large torque, thereby affecting the service life of the rotary drive device.

[0006] To achieve the above object, according to the first aspect of this application, a rotary drive device is provided, which includes a driving member, a transmission mechanism, an output rotating shaft, and a connecting washer. The transmission mechanism is in transmission connection with the driving member, and the transmission mechanism includes an output gear, and the output gear is provided with a first socket portion. One end of the output rotating shaft is used to connect to the device to be flipped, and the other end is provided with a second socket portion. One of the first socket portion and the second socket portion is sleeved outside the other. The connecting washer is in interference fit between the first socket portion and the second socket portion, and the contact areas of the first socket portion and the second socket portion with the connecting washer are different.

[0007] Optionally, in one embodiment, the first socket portion is a socket hole, the second socket portion is a socket shaft, the socket shaft is sleeved in the socket hole, and the connecting washer is in interference fit between the outer peripheral wall of the socket shaft and the inner peripheral wall of the socket hole.

[0008] Optionally, in one embodiment, the contact area between the socket shaft and the connecting washer is greater than the contact area between the socket hole and the connecting washer.

[0009] Optionally, in one embodiment, the connecting washer has opposite inner and outer peripheral surfaces. The inner peripheral surface abuts against the outer peripheral wall of the socket shaft; a contact bump is protruded on the outer peripheral surface, and the contact bump abuts against the inner peripheral wall of the socket hole.

[0010] Optionally, in one embodiment, there are a plurality of the contact bumps, and the plurality of contact bumps are arranged at intervals in the circumferential direction of the connecting washer.

[0011] Optionally, in one embodiment, the protruding height of the contact bump relative to the outer peripheral surface is greater than or equal to 0.3 mm and less than or equal to 0.8 mm; and / or, in the axial direction of the output gear, the axial length of the contact bump is greater than or equal to one-third of the axial length of the output gear and less than or equal to one-half of the axial length of the output gear.

[0012] Optionally, in one embodiment, the output rotating shaft further includes a positioning shaft section. The socket shaft is coaxially connected to the end surface of the positioning shaft section, and the outer diameter of the socket shaft is smaller than the outer diameter of the positioning shaft section.

[0013] Optionally, in one embodiment, the connecting washer is a non-closed ring.

[0014] Optionally, in one embodiment, the driving member has an output shaft. The transmission mechanism further includes a first worm and a first gear. The output shaft is connected to the first worm, the first worm meshes with the periphery of the first gear, and the first gear is in transmission connection with the output gear.

[0015] Optionally, in one embodiment, the transmission mechanism further includes a second worm and a second gear. The second worm is coaxially connected to the first gear, the second worm meshes with the periphery of the second gear, and the second gear is in transmission connection with the output gear.

[0016] Optionally, in one embodiment, the rotary driving device further includes an installation box and an installation bracket. The transmission mechanism is installed in the installation box, the driving member is fixed outside the installation box through the installation bracket, and the output shaft of the driving member extends into the installation box and is in transmission connection with the transmission mechanism.

[0017] Optionally, in one embodiment, the rotary driving device further includes a damper. The output rotating shaft is further provided with a plug-in portion, and the plug-in portion is in plug-in fit with the damper.

[0018] Optionally, in one embodiment, the rotation driving device further includes a mounting box and a support bearing. The support bearing is fixed on the mounting box and is coaxially arranged with the output rotating shaft; the damper includes a damper housing and a rotating body. The damper housing is fixed on the mounting box, the rotating body is rotatably mounted on the damper housing, and one end of the rotating body is located inside the damper housing, and the other end is supported on the support bearing and is in plug-in fit with the plugging portion.

[0019] According to a second aspect of the present application, there is provided a vehicle-mounted ceiling screen assembly, which includes a display screen and the rotation driving device according to any one of the above embodiments, and the display screen is connected to the output rotating shaft.

[0020] According to a second aspect of the present application, there is provided a vehicle, which includes the above-mentioned vehicle-mounted ceiling screen assembly.

[0021] In the rotation driving device of the embodiment of the present application, an interference fit connection washer is provided between the output gear and the first socket portion and the second socket portion of the output rotating shaft, so as to ensure that the output gear can drive the output rotating shaft to rotate, and further ensure that the driving member can drive the device to be flipped (such as a ceiling screen) to flip. And in the present application, the contact areas of the first socket portion and the second socket portion with the connection washer are different, that is, the contact areas of the first socket portion and the second socket portion with the connection washer are different, that is, the friction forces between the output gear and the output rotating shaft and the connection washer are different. Therefore, when the device to be flipped (such as a ceiling screen) is subjected to a large torque and drives the output rotating shaft to rotate, due to the different friction forces between the output gear and the output rotating shaft and the connection washer, the output rotating shaft will not drive the output gear to rotate together, but will rotate relative to the connection washer and the output gear, or the output rotating shaft will drive the connection washer to rotate relative to the output gear, that is, the output rotating shaft slips relative to the output gear, so as to avoid the situation that the output gear is driven to rotate and break its teeth, ensure the service life of the output gear, and further ensure the service life of the rotation driving device.

[0022] Other features and advantages of the present application will be described in detail in the subsequent specific implementation part. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative efforts.

[0024] To more fully understand the present application and its beneficial effects, the following description will be made in conjunction with the accompanying drawings, where the same reference numerals in the following description represent the same parts.

[0025] Figure 1 is a schematic structural diagram of an embodiment of the rotary drive device of the present application;

[0026] Figure 2 is Figure 1 the exploded view of the structure of the rotary drive device in

[0027] Figure 3 is a schematic structural diagram of an embodiment of the transmission mechanism in the rotary drive device of the present application;

[0028] Figure 4 is a schematic structural diagram of an embodiment of the output rotating shaft in the rotary drive device of the present application;

[0029] Figure 5 is a schematic structural diagram of an embodiment of the connecting washer in the rotary drive device of the present application;

[0030] Figure 6 is a schematic structural diagram of another embodiment of the connecting washer in the rotary drive device of the present application;

[0031] Figure 7 is a schematic structural diagram of an embodiment of the output gear and the connecting washer in the rotary drive device of the present application;

[0032] Figure 8 is Figure 7 the sectional view of the structure of the output gear and the connecting washer in

[0033] Figure 9 is the sectional view of the structure of the output gear, the connecting washer and the output rotating shaft in an embodiment of the rotary drive device of the present application.

[0034] Description of reference numerals:

[0035] 100, rotary drive device;

[0036] 10, driving member; 11, body; 12, output shaft;

[0037] 20, transmission mechanism; 21, output gear; 211, first socket part; 2111, socket hole; 22, first worm; 23, first gear; 24, second worm; 25, second gear; 26, intermediate gear;

[0038] 30, output rotating shaft; 31, second socket part; 311, socket shaft; 32, positioning shaft section; 321, positioning ring groove; 33, insertion part; 34, connecting plate;

[0039] 40. connecting washer; 41. inner peripheral surface; 42. outer peripheral surface; 43. abutting protrusion; 44. notch;

[0040] 50. Installation box; 51. Side cover;

[0041] 60. Install the bracket;

[0042] 70. damper; 71. damping housing; 72. rotating body; 73. damping cover body;

[0043] 80. Support bearing;

[0044] 90. Positioning retaining ring. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0046] In order to solve the technical problem that the existing rotary drive device is prone to tooth collapse when the ceiling screen is subjected to a large torque, thereby affecting the service life of the rotary drive device 100, according to the first aspect of the present application, as Figure 1 and Figure 2 As shown, a rotation driving device 100 is provided. The rotation driving device 100 mainly includes a driving member 10, a transmission mechanism 20, an output shaft 30 and a connecting washer 40.

[0047] The driving member 10 may be an electrode, and its specific structure, size, type, etc. are not specifically limited. For example, the driving member 10 may be a DC motor, an AC motor, an asynchronous motor, a synchronous motor, etc. In this embodiment, in order to transmit the kinetic energy of the driving member 10, Figure 2 As shown, the driving member 10 includes a body 11 and an output shaft 12. The output shaft 12 extends from the inside of the body 11. When the driving member 10 is started, the output shaft 12 rotates.

[0048] The transmission mechanism 20 is in transmission connection with the driving member 10, and the transmission mechanism 20 includes an output gear 21, such as Figure 3 As shown, the output gear 21 is provided with a first sleeve portion 211. Specifically, in this embodiment, as Figure 3As shown in the figure, the transmission mechanism 20 includes a first worm 22, a first gear 23, a second worm 24, a second gear 25, an output gear 21, and a plurality of intermediate gears 26. The first worm 22 is connected to the output shaft 12 of the driving member 10, and the first worm 22 meshes with the circumferential side of the first gear 23. The second worm 24 is coaxially connected to the first gear 23, and the second worm 24 meshes with the circumferential side of the second gear 25. One of the intermediate gears 26 is coaxially connected to the second gear 25, and the other intermediate gears 26 mesh with each other. The output gear 21 meshes with one of the intermediate gears 26. Therefore, when the driving member 10 is started, the output shaft 12 of the driving member 10 drives the output gear 21 to rotate through the transmission of the first worm 22, the first gear 23, the second worm 24, the second gear 25, and the plurality of intermediate gears 26.

[0049] Of course, in some other embodiments, the driving member 10 and the output gear 21 can also be transmitted through a rack, or through other numbers of worms or gears.

[0050] Therefore, the specific composition, structure, etc. of the transmission mechanism 20 can be flexibly selected according to needs, as long as the transmission mechanism 20 can transmit the torque of the driving member 10 to the output gear 21.

[0051] In particular, in this embodiment, as Figure 3 shown, the output gear 21 is provided with a first socket portion 211 for socketing with the output rotating shaft 30. The first socket portion 211 can be a socket hole 2111 or a socket shaft, and the specific structural form can be designed in cooperation with the second socket portion 31 on the output rotating shaft 30.

[0052] Specifically, as Figure 4 shown, one end of the output rotating shaft 30 is used for connecting with the device to be flipped, and the other end is provided with a second socket portion 31. One of the first socket portion 211 and the second socket portion 31 is socketed outside the other. Specifically, in the Figure 4 structural scheme shown, one end of the output rotating shaft 30 is provided with a connecting plate 34 for connecting with the device to be flipped, and the device to be flipped can be a display screen. The other end of the output rotating shaft 30 is provided with a second socket portion 31, and the second socket portion 31 can be a socket hole or a socket shaft 311, and the specific structural form needs to be designed in cooperation with the first socket structure.

[0053] For example, in an embodiment, as Figure 2 or Figure 7 shown, the first socket portion 211 on the output gear 21 is a socket hole 2111, and the socket hole 2111 is coaxially arranged with the output gear 21. As Figure 3As shown, the second socket part 31 on the output rotating shaft 30 is a socket shaft 311. During assembly, the second socket part 31 is socketed within the first socket part 211. For another example, in another embodiment, the first socket part 211 on the output gear 21 is a socket shaft, the socket shaft is coaxially arranged with the output gear 21, and the second socket part 31 on the output rotating shaft 30 is a socket hole. During assembly, the first socket part 211 is socketed within the second socket part 31.

[0054] It should be noted that the first socket part 211 and the second socket part 31 are in clearance socketing to ensure that there is space between the first socket part 211 and the second socket part 31 for installing the connection washer 40. As Figure 9 shown, in this application, the connection washer 40 is press-fitted between the first socket part 211 and the second socket part 31, and the contact areas between the first socket part 211 and the second socket part 31 and the connection washer 40 are set differently.

[0055] Specifically, taking the example of "the first socket part 211 is a socket hole 2111, the second socket part 31 is a socket shaft 311, and the second socket part 31 is socketed within the first socket part 211", during assembly, the second socket part 31 can be first press-fitted into the connection washer 40, and then the assembly composed of the second socket part 31 and the connection washer 40 can be press-fitted into the first socket part 211, so that the press-fitting of the connection washer 40 between the first socket part 211 and the second socket part 31 can be realized.

[0056] It can be understood that because the connection washer 40 is press-fitted between the first socket part 211 and the second socket part 31, the connection washer 40 can play a role in transmitting torque. That is, when the driving part 10 starts and drives the output gear 21 to rotate, the output gear 21 can drive the output rotating shaft 30 to rotate through the connection washer 40, thereby realizing the rotation of the device to be flipped (such as a ceiling-mounted screen).

[0057] Crucially, in this application, the contact areas between the first socket part 211 and the second socket part 31 and the connection washer 40 are different. For example, the contact area between the first socket part 211 and the connection washer 40 can be larger than the contact area between the second socket part 31 and the connection washer 40, or alternatively, the contact area between the first socket part 211 and the connection washer 40 can be smaller than the contact area between the second socket part 31 and the connection washer 40.

[0058] It can be understood that since the contact areas of the first socket part 211 and the second socket part 31 with the connecting washer 40 are set differently, the frictional forces between the output gear 21 and the output rotating shaft 30 and the connecting washer 40 will also differ in magnitude. Thus, when the ceiling-mounted screen (i.e., the device to be flipped) generates a large torque (this torque is greater than the torque output by the driving member 10) during emergency braking, rapid acceleration, passing through bumpy sections, or accidental impacts of the vehicle, the output rotating shaft 30 will not drive the output gear 21 to rotate together, but will rotate relative to the output gear 21 and the connecting washer 40, or the output rotating shaft 30 will drive the connecting washer 40 to rotate relative to the output gear 21.

[0059] For example, taking "the contact area between the first socket part 211 and the connecting washer 40 is greater than the contact area between the second socket part 31 and the connecting washer 40" as an example, at this time, the frictional force between the output gear 21 and the connecting washer 40 is greater than the frictional force between the output rotating shaft 30 and the connecting washer 40. When the ceiling-mounted screen generates a large torque, and this torque is greater than the working torque of the connecting washer 40 (i.e., the torque transmitted by the connecting washer 40 between the output gear 21 and the output rotating shaft 30), because the frictional force between the output rotating shaft 30 and the connecting washer 40 is smaller and the frictional force between the connecting washer 40 and the output gear 21 is larger, the output rotating shaft 30 will rotate relative to the connecting washer 40 and the output gear 21 under the drive of the ceiling-mounted screen, that is, the output rotating shaft 30 slips relative to the output gear 21, and thus will not drive the output gear 21 to rotate, avoiding the situation of tooth breakage due to the relative rotation of the gear and the gear it meshes with, and ensuring the service life of the output gear 21 and the rotation driving device 100.

[0060] It can be referred to Figure 9 Taking "the contact area between the first socket part 211 and the connecting washer 40 is less than the contact area between the second socket part 31 and the connecting washer 40" as an example, at this time, the frictional force between the output gear 21 and the connecting washer 40 is smaller, and the frictional force between the output rotating shaft 30 and the connecting washer 40 is larger. When the ceiling-mounted screen generates a large torque, and this torque is greater than the working torque of the connecting washer 40, because the frictional force between the output gear 21 and the connecting washer 40 is smaller and the frictional force between the output rotating shaft 30 and the connecting washer 40 is larger, the output rotating shaft 30 will drive the connecting washer 40 to rotate relative to the output gear 21 under the drive of the ceiling-mounted screen, that is, the output rotating shaft 30 slips relative to the output gear 21, and thus will not drive the output gear 21 to rotate, avoiding the situation of tooth breakage due to the relative rotation of the gear and the gear it meshes with, and ensuring the service life of the output gear 21 and the rotation driving device 100.

[0061] It should be noted here that the "contact area" defined in this application refers to the surface area where the first socket part 211 and the second socket part 31 are in contact with the inner peripheral surface 41 or the outer peripheral surface 42 of the connecting washer 40. For example, Figure 9 As shown, taking the "first socket part 211 as the socket hole 2111, the second socket part 31 as the socket shaft 311, and the second socket part 31 being sleeved inside the first socket part 211" as an example, at this time, the contact area between the inner peripheral wall of the first socket part 211 and the outer peripheral surface 42 of the connecting washer 40 is the contact area between the first socket part 211 and the connecting washer 40, and the contact area between the outer peripheral wall of the second socket part 31 and the inner peripheral surface 41 of the connecting washer 40 is the contact area between the second socket part 31 and the connecting washer 40.

[0062] In summary, it can be understood that in the rotation driving device 100 of the embodiment of this application, by press-fitting a connecting washer 40 between the output gear 21, the first socket part 211, and the second socket part 31 of the output rotating shaft 30, it can be ensured that the output gear 21 can drive the output rotating shaft 30 to rotate, and further ensure that the driving member 10 can drive the device to be flipped (such as a ceiling-mounted screen) to flip. And in this application, the contact areas between the first socket part 211 and the second socket part 31 and the connecting washer 40 are different, that is, the frictional forces between the output gear 21 and the output rotating shaft 30 and the connecting washer 40 are different. Therefore, when the device to be flipped (such as a ceiling-mounted screen) is subjected to a large torque and drives the output rotating shaft 30 to rotate, due to the different frictional forces between the output gear 21 and the output rotating shaft 30 and the connecting washer 40, the output rotating shaft 30 will not drive the output gear 21 to rotate together, but will rotate relative to the connecting washer 40 and the output gear 21, or the output rotating shaft 30 will drive the connecting washer 40 to rotate relative to the output gear 21, that is, the output rotating shaft 30 slips relative to the output gear 21. In this way, it can be avoided that the output gear 21 is driven to rotate and causes tooth breakage, ensuring the service life of the output gear 21, and further ensuring the service life of the rotation driving device 100.

[0063] Optionally, in one embodiment, as Figure 8 shown, the first socket part 211 is the socket hole 2111, and the socket hole 2111 penetrates the output gear 21 along the axial direction of the output gear 21. As Figure 4 shown, the second socket part 31 is the socket shaft 311, and the socket shaft 311 is a section of the shaft body on the output rotating shaft 30. Please refer to Figure 9 , the socket shaft 311 is sleeved inside the socket hole 2111, and the connecting washer 40 is press-fitted between the outer peripheral wall of the socket shaft 311 and the inner peripheral wall of the socket hole 2111. During assembly, the socket shaft 311 can be press-fitted into the connecting washer 40 first, and then the assembly composed of the socket shaft 311 and the connecting washer 40 can be press-fitted into the socket hole 2111.

[0064] It can be understood that in this embodiment, since the output rotating shaft 30 itself is a shaft structure, by making the first socket part 211 on the output gear 21 a socket hole 2111 and making the second socket part 31 on the output rotating shaft 30 a socket shaft 311, not only can the weight of the output gear 21 be reduced, but also the structure of the output rotating shaft 30 can be simplified, facilitating the production of the output rotating shaft 30.

[0065] Optionally, in one embodiment, the contact area between the socket shaft 311 and the connecting washer 40 is larger than the contact area between the socket hole 2111 and the connecting washer 40, that is, the frictional force between the output rotating shaft 30 and the connecting washer 40 is greater than the frictional force between the output gear 21 and the connecting washer 40. In this way, when a large torque is generated in the ceiling-mounted screen, the output rotating shaft 30 can drive the connecting washer 40 to rotate relative to the output gear 21, that is, the output rotating shaft 30 slips relative to the output gear 21, avoiding the situation of tooth breakage of the output gear 21 rotating and ensuring the service life of the output gear 21 and the rotation driving device 100.

[0066] It should be noted here that in order to make the contact area between the socket shaft 311 and the connecting washer 40 larger than the contact area between the socket hole 2111 and the connecting washer 40, the width of the outer peripheral surface 42 of the connecting washer 40 can be made smaller than the width of its inner peripheral surface 41, that is, the cross-section of the connecting washer 40 is trapezoidal. In this way, the surface area of the inner peripheral surface 41 of the connecting washer 40 can be made larger than the surface area of its outer peripheral surface 42, and further the contact area between the socket shaft 311 and the connecting washer 40 can be made larger than the contact area between the socket hole 2111 and the connecting washer 40.

[0067] Or optionally, in another embodiment, as Figure 5 , Figure 6 and Figure 9 shown, the connecting washer 40 has opposite inner peripheral surface 41 and outer peripheral surface 42, and the inner peripheral surface 41 abuts against the outer peripheral wall of the socket shaft 311; a contact bump 43 protrudes from the outer peripheral surface 42, and the contact bump 43 abuts against the inner peripheral wall of the socket hole 2111.

[0068] That is, in this embodiment, the entire inner peripheral surface 41 of the connecting washer 40 abuts against the outer peripheral wall of the socket shaft 311, and when the connecting washer 40 abuts against the inner peripheral wall of the socket hole 2111, it abuts against the inner peripheral wall of the socket hole 2111 through the contact bump 43 on the outer peripheral surface 42. In this way, the contact area between the socket shaft 311 and the connecting washer 40 can be made larger than the contact area between the socket hole 2111 and the connecting washer 40.

[0069] It should be noted here that there can be one or more abutting bumps 43. For example, optionally, in one embodiment, there is one abutting bump 43, and the abutting bump 43 extends along the circumferential direction of the connecting washer 40. Or, optionally, in another embodiment, as Figure 5 shown, there are multiple abutting bumps 43, and the multiple abutting bumps 43 are arranged at intervals along the circumferential direction of the connecting washer 40. This can not only reduce the contact area between the connecting washer 40 and the socket hole 2111, but also facilitate the interference fit of the connecting washer 40 between the socket shaft 311 and the socket hole 2111.

[0070] Optionally, in one embodiment, the protruding height of the abutting bump 43 relative to the outer peripheral surface 42 is greater than or equal to 0.3 mm and less than or equal to 0.8 mm. Specifically, the protruding height can be 0.3 mm, 0.35 mm, 0.4 mm, 0.45 mm, 0.5 mm, 0.55 mm, 0.6 mm, 0.65 mm, 0.7 mm, 0.75 mm, 0.8 mm, etc.

[0071] It can be understood that if the protruding height of the abutting bump 43 relative to the outer peripheral surface 42 of the connecting washer 40 is less than 0.3 mm, it will cause the height of the abutting bump 43 to be too small, and errors are likely to occur during processing, resulting in uneven protruding heights of the multiple abutting bumps 43. If the protruding height of the abutting bump 43 relative to the outer peripheral surface 42 of the connecting washer 40 is greater than 0.8 mm, it will cause the height of the abutting bump 43 to be too high, and a relatively large gap needs to be left between the socket hole 2111 and the socket shaft 311 to install the connecting washer 40, and the structure is not compact enough.

[0072] Therefore, in this embodiment, by making the protruding height of the abutting bump 43 relative to the outer peripheral surface 42 greater than or equal to 0.3 mm and less than or equal to 0.8 mm, it can not only ensure more uniform protruding heights among the multiple abutting bumps 43, but also make the structure of the rotary drive device 100 more compact.

[0073] Optionally, in one embodiment, in the axial direction of the output gear 21, the axial length of the abutting bump 43 is greater than or equal to one-third of the axial length of the output gear 21 and less than or equal to one-half of the axial length of the output gear 21. Specifically, the axial length of the abutting bump 43 can be one-third, eleven-thirtieths, twelve-thirtieths, thirteen-thirtieths, fourteen-thirtieths, one-half, etc. of the axial length of the output gear 21.

[0074] It can be understood that if the axial length of the abutting bump 43 is less than one-third of the axial length of the output gear 21, the length of the abutting bump 43 will be relatively small, and the frictional force between the abutting bump 43 and the inner peripheral wall of the socket hole 2111 will be relatively small. When it is necessary to transmit torque to the ceiling-mounted screen through the driving member 10, it is not conducive to the output gear 21 to transmit torque to the output rotating shaft 30 through the connecting washer 40. If the axial length of the abutting bump 43 is greater than one-half of the axial length of the output gear 21, the length of the abutting bump 43 will be too long, and the frictional force between the abutting bump 43 and the inner peripheral wall of the socket hole 2111 will be relatively large. When a relatively large torque is generated on the ceiling-mounted screen, it is not conducive to the output rotating shaft 30 to slip relative to the output gear 21 with the connecting washer 40.

[0075] Therefore, in this embodiment, by making the axial length of the abutting bump 43 greater than or equal to one-third of the axial length of the output gear 21 and less than or equal to one-half of the axial length of the output gear 21, it can not only ensure the stable transmission of torque from the output gear 21 to the output rotating shaft 30, but also ensure that the output rotating shaft 30 can slip relative to the output gear 21 when a relatively large torque is generated on the ceiling-mounted screen.

[0076] Optionally, in one embodiment, as Figure 4 shown, the output rotating shaft 30 further includes a positioning shaft section 32. The socket shaft 311 is coaxially connected to the end face of the positioning shaft section 32, and the outer diameter of the socket shaft 311 is smaller than the outer diameter of the positioning shaft section 32. The inner diameter of the socket hole 2111 is also smaller than the outer diameter of the positioning shaft section 32. The connecting washer 40 is sleeved outside the socket shaft 311.

[0077] Specifically, reference can be made to Figure 9 . During assembly, the connecting washer 40 can be press-fitted and sleeved outside the socket shaft 311 first, and then the output gear 21 can be press-fitted and sleeved on the socket shaft 311. Since the inner diameter of the socket hole 2111 of the output gear 21 is smaller than the outer diameter of the positioning shaft section 32, the output gear 21 can only be sleeved on the socket shaft 311 from the end away from the positioning shaft section 32. At this time, since the outer diameter of the socket shaft 311 is smaller than the outer diameter of the positioning shaft section 32, when the output gear 21 is sleeved on the socket shaft 311, the end face of the positioning shaft section 32 can limit the axial displacement of the connecting washer 40, realizing the positioning of the connecting washer 40, so that the connecting washer 40 can be better assembled between the socket shaft 311 and the socket hole 2111.

[0078] As Figure 4 shown, a positioning ring groove 321 is further provided on the positioning shaft section 32, as Figure 2As shown, the rotary drive device 100 further includes a mounting box 50 and a positioning retaining ring 90. The transmission mechanism 20 is installed in the mounting box 50. The socket shaft 311 and the positioning shaft section 32 both extend into the mounting box 50. The socket shaft 311 is sleeved in the socket hole 2111 of the output gear 21. The positioning retaining ring 90 is partially engaged in the positioning ring groove 321 and partially protrudes relative to the outer peripheral surface of the positioning shaft section 32, and the positioning retaining ring 90 abuts against the inner side wall of the mounting box 50. In this way, the output rotating shaft 30 can be restricted from detaching from the output gear 21 and the mounting box 50, ensuring the installation stability of the output rotating shaft 30.

[0079] Optionally, in one embodiment, as Figure 5 shown, the connecting washer 40 is a non-closed ring, that is, there is a notch 44 on the connecting washer 40. This allows the connecting washer 40 to have a certain deformation space in its circumferential direction. Further, when the connecting washer 40 is press-fitted between the output gear 21 and the output rotating shaft 30, it can avoid the situation where the connecting washer 40 generates stress concentration or extrudes sharp corners due to being squeezed, ensuring the structural stability and installation stability of the connecting washer 40.

[0080] Optionally, in one embodiment, as Figure 2 shown, the driving member 10 has an output shaft 12. As Figure 3 shown, the transmission mechanism 20 further includes a first worm 22 and a first gear 23. The output shaft 12 is connected to the first worm 22. The first worm 22 meshes with the circumferential side of the first gear 23. The first gear 23 is in transmission connection with the output gear 21. Among them, the first gear 23 is a helical gear, which can better mesh with the first worm 22. It can be understood that since the first worm 22 meshes with the circumferential side of the first gear 23, the first worm 22 can mesh at any position on the first gear 23 along the circumferential direction of the first gear 23. And since the driving member 10 is connected to the first worm 22, the extending direction of the driving member 10 during installation can be flexibly selected according to needs, and thus it can be applied in different installation spaces, improving the flexibility of the rotary drive device 100.

[0081] Optionally, in one embodiment, as Figure 3 shown, the transmission mechanism 20 further includes a second worm 24 and a second gear 25. The second worm 24 is coaxially connected to the first gear 23, and the second worm 24 meshes with the circumferential side of the second gear 25. The second gear 25 is in transmission connection with the output gear 21. That is, in this embodiment, the transmission mechanism 20 is provided with two worms, and the extending directions of the two worms are perpendicular to each other. In this way, all the transmission components are not assembled forward along a straight line, thereby improving the structural compactness of the transmission mechanism 20 and being beneficial to reducing the volume of the rotary drive device 100.

[0082] Among them, the second gear 25 and the output gear 21 can be drivingly connected through a plurality of intermediate gears 26.

[0083] Optionally, in one embodiment, as Figure 1 and Figure 2 shown, the rotary driving device 100 further includes a mounting box 50 and a mounting bracket 60. The transmission mechanism 20 is installed in the mounting box 50, and the driving member 10 is fixed outside the mounting box 50 through the mounting bracket 60. The output shaft 12 of the driving member 10 extends into the mounting box 50 and is drivingly connected to the transmission mechanism 20.

[0084] Specifically, in this embodiment, a through hole may be provided on the side wall of the mounting box 50 to facilitate the output shaft 12 of the driving member 10 to extend into the mounting box 50 and be connected to the transmission mechanism 20. The mounting bracket 60 is in a plate shape, and a clamping hole is provided on the mounting bracket 60. The body 11 of the driving member 10 is clamped and fixed in the clamping hole, and then the mounting bracket 60 is fixed to the side wall of the mounting box 50 through bolts.

[0085] That is to say, in this embodiment, the driving member 10 is not directly installed in the mounting box 50 together with the transmission mechanism 20, but is fixed outside the mounting box 50 through the mounting bracket 60, which facilitates the disassembly and assembly of the driving member 10.

[0086] Optionally, in one embodiment, as Figure 2 shown, the rotary driving device 100 further includes a damper 70. The output rotating shaft 30 is further provided with a plugging portion 33. The plugging portion 33 is located at one end of the socket shaft 311 away from the positioning shaft section 32, and the plugging portion 33 is in plugging cooperation with the damper 70. Specifically, in this embodiment, the damper 70 is a torque damper, and the damper 70 includes a damper housing 71 and a rotating body 72. The damper housing 71 is filled with damping oil. One section of the rotating body 72 is located in the damper housing 71, and the other end is in plugging cooperation with the plugging portion 33 of the output rotating shaft 30.

[0087] When the rotating body 72 rotates relative to the damper housing 71 driven by the output rotating shaft 30, the rotating body 72 will push the damping oil in the damper housing 71, thereby generating a damping force. The generated damping force acts on the output rotating shaft 30, and thus a smooth rotation can be obtained. That is, the setting of the damper 70 can make the rotation of the ceiling-mounted screen more stable, thereby providing a better user experience.

[0088] Of course, in some other embodiments, the damper 70 can also be of other types, such as a gas damper, a viscoelastic damper, a friction damper, an electromagnetic damper, and so on.

[0089] Optionally, in one embodiment, as Figure 2As shown, the rotation driving device 100 further includes a mounting box 50 and a support bearing 80. The support bearing 80 is fixed to the mounting box 50 and is coaxially arranged with the output rotating shaft 30. The damper 70 includes a damper housing 71 and a rotating body 72. The damper housing 71 is fixed to the mounting box 50. The rotating body 72 is rotatably mounted on the damper housing 71. One end of the rotating body 72 is located inside the damper housing 71, and the other end is supported on the support bearing 80 and is in plug-in fit with the plug portion 33. In this way, the coaxiality of the damper 70 and the output rotating shaft 30 can be improved, and the situation that the service life of the damper 70 is affected due to non-coaxiality with the output rotating shaft 30 can be avoided.

[0090] Among them, as Figure 2 shown, the damper 70 further includes a damper cover 73. The damper housing 71 is snap-fixed to the damper cover 73. The damper cover 73 is fixed to the side wall of the mounting box 50 by bolts. In this way, the damper housing 71 can be fixed relative to the mounting box 50, and the installation and disassembly of the damper 70 are convenient.

[0091] According to the second aspect of the present application, a vehicle ceiling screen assembly (not shown) is provided. The vehicle ceiling screen assembly includes a display screen (not shown) and the rotation driving device 100 of any one of the above embodiments. The display screen is connected to the output rotating shaft 30. Then, when the driving member 10 is started, the display screen can be driven to rotate through the transmission mechanism 20 and the output rotating shaft 30, so as to realize the flipping open or closing of the display screen.

[0092] It can be understood that since the vehicle ceiling screen assembly of the present application includes the rotation driving device 100 of any one of the above embodiments, the vehicle ceiling screen assembly has all the beneficial effects of the above rotation driving device 100, and the present disclosure will not elaborate herein.

[0093] According to the second aspect of the present application, a vehicle (not shown) is provided. The vehicle includes the above vehicle ceiling screen assembly, and the vehicle ceiling screen assembly can be fixed to the top inside the vehicle. It can be understood that since the vehicle of the present application includes the above vehicle ceiling screen assembly, and the above vehicle ceiling screen assembly further includes the rotation driving device 100 of any one of the above embodiments, the vehicle has all the beneficial effects of the above rotation driving device 100, and the present disclosure will not elaborate herein.

[0094] It should be noted that the vehicle can be a fuel vehicle, a plug-in hybrid vehicle or a new energy vehicle, etc., and the present disclosure does not make specific limitations thereto.

[0095] In the description of the present application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of the present application, "a plurality of" means two or more, unless otherwise specifically defined.

[0096] In the above embodiments, the descriptions of the respective embodiments have their own focuses. For parts not detailed in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.

[0097] Among the embodiments, implementation manners and related technical features of the present application, they can be combined and replaced with each other without conflict.

[0098] The above are only the preferred embodiments of the present application and do not impose any form of limitation on the present application. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application still fall within the scope of the technical solution of the present application.

Claims

1. A rotary drive device, characterized in that, Comprising: A driving member; A transmission mechanism, the transmission mechanism is drivingly connected to the driving member, and the transmission mechanism includes an output gear, and the output gear is provided with a first socket portion; An output rotating shaft, one end of the output rotating shaft is used for connecting with a member to be driven, the other end is provided with a second socket portion, and one of the first socket portion and the second socket portion is sleeved on the other; and, A connecting washer, the connecting washer is press-fitted between the first socket portion and the second socket portion, and the contact areas of the first socket portion and the second socket portion with the connecting washer are different from each other.

2. The rotational drive device according to claim 1, characterized in that, The first socket portion is a socket hole, the second socket portion is a socket shaft, the socket shaft is sleeved in the socket hole, and the connecting washer is press-fitted between the outer peripheral wall of the socket shaft and the inner peripheral wall of the socket hole.

3. The rotational drive device according to claim 2, characterized in that, The contact area between the socket shaft and the connecting washer is larger than the contact area between the socket hole and the connecting washer.

4. The rotary drive device according to claim 3, characterized in that, The connecting washer has an inner peripheral surface and an outer peripheral surface opposite to each other, the inner peripheral surface abuts against the outer peripheral wall of the socket shaft; a contact bump is convexly provided on the outer peripheral surface, and the contact bump abuts against the inner peripheral wall of the socket hole.

5. The rotary drive device according to claim 4, characterized in that, A plurality of the contact bumps are provided, and the plurality of contact bumps are arranged at intervals in the circumferential direction of the connecting washer.

6. The rotational drive device according to claim 5, characterized in that, The protruding height of the contact bump relative to the outer peripheral surface is greater than or equal to 0.3 mm and less than or equal to 0.8 mm; And / or, in the axial direction of the output gear, the axial length of the contact bump is greater than or equal to one-third of the axial length of the output gear and less than or equal to one-half of the axial length of the output gear.

7. The rotational drive device according to claim 2, characterized in that, The output rotating shaft further includes a positioning shaft section, the socket shaft is coaxially connected to the end surface of the positioning shaft section, and the outer diameter of the socket shaft is smaller than the outer diameter of the positioning shaft section.

8. The rotational drive device according to any one of claims 1 to 7, characterized in that, The connecting washer is a non-closed ring.

9. The rotary drive device according to any one of claims 1 to 7, characterized in that, The driving member has an output shaft, the transmission mechanism further includes a first worm and a first gear, the output shaft is connected to the first worm, the first worm meshes with the circumferential side of the first gear, and the first gear is drivingly connected to the output gear.

10. The rotary drive device according to claim 9, characterized in that, The transmission mechanism further includes a second worm and a second gear, the second worm is coaxially connected to the first gear, and the second worm meshes with the circumferential side of the second gear, and the second gear is drivingly connected to the output gear.

11. The rotary drive device according to any one of claims 1-7, characterized in that, The rotary driving device further includes an installation box and an installation bracket, the transmission mechanism is installed in the installation box, the driving member is fixed outside the installation box through the installation bracket, and the output shaft of the driving member extends into the installation box and is drivingly connected to the transmission mechanism.

12. The rotary drive device according to any one of claims 1-7, characterized in that, The rotary driving device further includes a damper, and the output rotating shaft is further provided with a plug-in portion, and the plug-in portion is in plug-in fit with the damper.

13. The rotary drive device according to claim 12, characterized in that, The rotary driving device further includes an installation box and a support bearing, the support bearing is fixed on the installation box and is coaxially arranged with the output rotating shaft; The damper includes a damper housing and a rotating body. The damper housing is fixed to the installation box. The rotating body is rotatably installed on the damper housing. One end of the rotating body is located inside the damper housing, and the other end is supported on the support bearing and is in plug-in fit with the plug-in part.

14. A vehicle-mounted ceiling screen assembly, characterized in that, It includes a display screen and the rotary drive device according to any one of claims 1-13. The display screen is connected to the output rotating shaft.

15. A vehicle, characterized in that, It includes the in-vehicle ceiling-mounted screen assembly according to claim 14.

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