Ceiling screen device and vehicle

Abstract

The ceiling screen device and the vehicle are applied to the field of vehicles, the ceiling screen device comprises a mounting frame, a shell is arranged on the mounting frame, a main rotating shaft is rotationally connected into the shell and arranged on a display screen, and a driving unit used for driving the main rotating shaft to rotate is arranged on the mounting frame; and a damping unit for eliminating a transmission gap of the main rotating shaft is arranged on the mounting frame. The folding display screen has the technical effects that the driving unit is started, the driving unit drives the main rotating shaft to rotate, the main rotating shaft drives the display screen to move to achieve folding of the display screen, the damping unit is used for eliminating a transmission gap generated after the main rotating shaft is durable, the possibility of shaking of the display screen is reduced, and the operation stability during folding of the display screen is improved.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a ceiling screen device and a vehicle. Background Art

[0002] Against the backdrop of the rapid development of new energy vehicles, the demand for various intelligent products such as vehicle-mounted electric ceiling screens is growing. Vehicle-mounted ceiling screens are a type of display screen used to provide functions such as video entertainment or navigation. They are usually installed on the inner top wall of the car for entertainment of rear passengers.

[0003] Announcement No. CN221393310U discloses a vehicle-mounted ceiling screen, including a base, which is fixed on the top surface of the vehicle compartment; a display screen, which can rotate around a horizontal axis relative to the base; a drive assembly, including a drive shaft, a driving bevel gear, a driven bevel gear, an elastic member and a drive unit; the drive unit is connected to the drive shaft for driving the drive shaft to rotate; the driven bevel gear is fixedly connected to the display screen; the driving bevel gear is sleeved on the outer circumference of the drive shaft so that it can rotate with the drive shaft.

[0004] During use of the above-mentioned vehicle-mounted ceiling screen, the driving assembly relies on the meshing of the active bevel gear and the driven bevel gear to achieve transmission. The meshing of the bevel gears requires high transmission accuracy. After a corresponding number of cycles, wear is likely to occur between the active bevel gear and the driven bevel gear, resulting in a transmission gap, which causes severe shaking during the folding process of the display screen and poor operating stability. Summary of the Invention

[0005] In order to help solve the problem that during the use of relevant vehicle-mounted ceiling screens, the meshing of bevel gears requires higher transmission accuracy, and wear is easily generated between the active bevel gear and the driven bevel gear after a corresponding number of cycles, thereby generating a transmission gap, which causes severe shaking during the folding of the display screen and poor operating stability, the present application provides a ceiling screen device, which adopts the following technical solution: it includes a mounting frame, the mounting frame is provided with a shell, the shell is rotatably connected to a main rotating shaft, the main rotating shaft is arranged on the display screen, the mounting frame is provided with a driving unit for driving the main rotating shaft to rotate, and the mounting frame is provided with a damping unit for eliminating the transmission gap of the main rotating shaft.

[0006] In a specific possible implementation scheme, the driving unit includes a first driving motor provided on the housing, and an output end of the first driving motor is transmission-connected to the main rotating shaft via a transmission assembly.

[0007] In a specific feasible implementation scheme, the transmission assembly includes a first worm gear arranged at the output end of the first drive motor, a fifth gear is fixedly sleeved on the outer edge of the main rotating shaft, the first worm gear is connected to the fifth gear through a first transmission gear set, the first transmission gear set includes a second worm gear rotatably connected in the housing, a first worm wheel is fixedly sleeved at one end of the second worm gear, the first worm gear and the first worm wheel are meshed with each other, the first gear and the second worm wheel are respectively rotatably connected to the housing, the second worm wheel and the first gear are coaxially arranged and the second worm wheel and the second worm gear are meshed with each other, the second gear, the third gear and the fourth gear are respectively rotatably connected to the housing, the second gear and the fourth gear are coaxially arranged, the second gear and the first gear are meshed with each other, the fourth gear and the third gear are meshed with each other, and the third gear and the fifth gear are meshed with each other.

[0008] In a specific possible implementation scheme, the damping unit includes an annular cone block arranged on the outer edge of the main rotating shaft, a damping bushing is provided on the shell, an annular cone hole matching the annular cone block is opened on the damping bushing, the annular cone block is located at the inner edge of the annular cone hole and contacts the hole wall of the annular cone hole, an elastic member is sleeved on the end of the main rotating shaft facing away from the display screen, the elastic member is tightly pressed between the main rotating shaft and the shell, and a limit assembly is provided on the shell for limiting the rotation of the damping bushing relative to the shell.

[0009] In a specific feasible implementation scheme, the limiting assembly includes several anti-rotation blocks arranged on the outer edge of the damping bushing, and the shell is provided with several anti-rotation grooves matching the anti-rotation blocks, and the several anti-rotation blocks are respectively inserted into the several anti-rotation grooves.

[0010] In a specific possible implementation scheme, the main rotating shaft and the housing are rotationally connected via a thrust bearing, and the elastic member is tightly pressed between the thrust bearing and the housing.

[0011] In a specific possible implementation scheme, a backing ring is provided on the outer edge of the main rotating shaft, and the backing ring is tightly pressed between the thrust bearing and the elastic member.

[0012] In a specific possible implementation manner, the main rotating shaft and the housing are rotationally connected via a needle bearing, and the needle bearing is located between the display screen and the damping bushing.

[0013] In a specific possible implementation scheme, a slave rotation axis is provided on the display screen, the main rotation axis and the slave rotation axis are respectively located on both sides of the display screen and are coaxially arranged, and the end of the slave rotation axis away from the display screen is rotatably connected to the mounting frame.

[0014] In a specific possible implementation scheme, a lock shell is provided on the mounting frame, a lock tongue is slidably connected inside the lock shell, a lock slot corresponding to the lock tongue is opened on the display screen, the end of the lock tongue facing the display screen is inserted into the lock slot, and a driving component for driving the lock tongue to slide is provided on the lock shell.

[0015] In a specific possible implementation scheme, the drive assembly includes a second drive motor arranged on the lock housing, a third worm is coaxially arranged on the output end of the second drive motor, a sixth gear is rotatably connected to the lock housing, the third worm is connected to the sixth gear through a second transmission gear set, a rack matching the sixth gear is provided on the lock tongue, and the sixth gear is meshingly connected to the rack.

[0016] In a specific possible implementation manner, the first driving motor is provided with an on-axis magnetic encoder, and the end of the rotating shaft away from the display screen is provided with an off-axis encoder.

[0017] In a specific possible implementation manner, a vehicle comprises the above-mentioned ceiling screen device.

[0018] To sum up, the present application has at least the following beneficial technical effects: starting the driving unit, the driving unit drives the main rotating shaft to rotate, the main rotating shaft drives the display screen to move to realize the folding of the display screen, and using the damping unit to eliminate the transmission gap generated by the durability of the main rotating shaft, thereby reducing the possibility of shaking of the display screen and improving the operating stability of the display screen when folding. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0020] Figure 2 It is a structural diagram for reflecting the fifth gear in the embodiment of the present application.

[0021] Figure 3 yes Figure 2 Enlarged schematic diagram of point A in the middle.

[0022] Figure 4 It is a schematic structural diagram for reflecting the second worm in the embodiment of the present application.

[0023] Figure 5 yes Figure 2 Enlarged schematic diagram of point B in the middle.

[0024] Figure markings: 1. mounting bracket; 2. housing; 3. main rotating shaft; 4. display screen; 5. first drive motor; 6. first worm; 7. fifth gear; 8. second worm; 9. first worm gear; 10. first gear; 11. second worm gear; 12. second gear; 13. third gear; 14. fourth gear; 15. annular cone block; 16. damping bushing; 17. elastic member; 18. anti-rotation block; 19. thrust bearing; 20. gasket; 21. needle roller bearing; 22. slave rotating shaft; 23. lock tongue; 24. lock groove; 25. sixth gear; 26. rack; 27. lock housing; 28. on-axis magnetic encoder. DETAILED DESCRIPTION

[0025] The following is combined with Figure 1-5 This application is described in further detail.

[0026] The embodiment of the present application discloses a ceiling screen device.

[0027] Reference Figure 1 and Figure 2 The ceiling screen device includes a mounting frame 1, a housing 2 is bolted to the mounting frame 1, and a main rotating shaft 3 is rotatably connected in the housing 2. In the embodiment of the present application, the main rotating shaft 3 is mounted on the display screen 4 via a connecting plate, and the connecting plate is bolted to the display screen 4. The mounting frame 1 is provided with a driving unit for driving the main rotating shaft 3 to rotate, and the mounting frame 1 is provided with a damping unit for eliminating the transmission gap of the main rotating shaft 3. The display screen 4 is connected to a slave rotating shaft 22. In the embodiment of the present application, the main rotating shaft 3 and the slave rotating shaft 22 are respectively located on both sides of the display screen 4 and are coaxially arranged, thereby further balancing the load on the display screen 4. The end of the slave rotating shaft 22 facing away from the display screen 4 is rotatably connected to the mounting frame 1. The slave rotating shaft 22 plays a supporting role in the rotation of the display screen 4 and further improves the stability of the display screen 4.

[0028] Therefore, the driving unit is started, and the driving unit drives the main rotating shaft 3 to rotate, and the main rotating shaft 3 drives the display screen 4 to move to realize the folding of the display screen 4. The damping unit is used to eliminate the transmission gap generated after the main rotating shaft 3 is worn, thereby reducing the possibility of shaking of the display screen 4 and improving the operating stability of the display screen 4 when folding.

[0029] Reference Figure 2 、 Figure 3 and Figure 4The driving unit includes a first driving motor 5 provided on the housing 2 , and an output end of the first driving motor 5 is connected to the main rotating shaft 3 through a transmission assembly. The transmission assembly includes a first worm 6 coaxially arranged at the output end of the first drive motor 5, a fifth gear 7 is fixedly sleeved on the outer edge of the main rotating shaft 3, the first worm 6 is transmission-connected to the fifth gear 7 through a first transmission gear group, and the first transmission gear group includes a second worm 8 rotatably connected to the housing 2. In the embodiment of the present application, the second worm 8 is vertically arranged, and a first worm gear 9 is fixedly sleeved at one end of the second worm 8. The first worm 6 and the first worm gear 9 are meshed with each other. The housing 2 is respectively rotatably connected with a first gear 10 and a second worm gear 11. The second worm gear 11 and the first gear 10 are coaxially arranged, and the second worm gear 11 and the second worm 8 are meshed with each other. The housing 2 is respectively rotatably connected with a second gear 12, a third gear 13 and a fourth gear 14. The second gear 12 and the fourth gear 14 are coaxially arranged, the second gear 12 and the first gear 10 are meshed with each other, the fourth gear 14 and the third gear 13 are meshed with each other, and the third gear 13 and the fifth gear 7 are meshed with each other.

[0030] Therefore, the drive motor is started, driving the first worm 6 at the output end of the drive motor to rotate, the first worm 6 drives the first worm wheel 9 to rotate, the first worm wheel 9 drives the second worm 8 to rotate, the second worm 8 drives the second worm wheel 11 to rotate, thereby driving the first gear 10 to rotate synchronously, and the first gear 10 then drives the second gear 12 to rotate. Since the second gear 12 and the fourth gear 14 are arranged coaxially, the second gear 12 drives the fourth gear 14 to rotate, and the fourth gear 14 drives the third gear 13 to rotate synchronously. Since the third gear 13 is engaged with the fifth gear 7, the third gear 13 drives the fifth gear 7 to rotate, thereby driving the main rotating shaft 3 to rotate synchronously, realizing the folding of the display screen 4. The use of a multi-stage gear transmission method can achieve a high transmission ratio and torque transmission within a limited space, with a compact structure, good stability, and high transmission efficiency.

[0031] Reference Figure 2 and Figure 3 The damping unit includes an annular cone block 15 fixedly connected to the outer edge of the main rotating shaft 3. A damping bushing 16 is installed in the housing 2. The damping bushing 16 is provided with an annular cone hole that matches the size of the annular cone block 15. The annular cone block 15 is located at the inner edge of the annular cone hole and contacts the hole wall of the annular cone hole. An elastic member 17 is sleeved on the end of the main rotating shaft 3 facing away from the display screen 4. The elastic member 17 is tightly pressed between the main rotating shaft 3 and the housing 2. The housing 2 is provided with a limit assembly for limiting the rotation of the damping bushing 16 relative to the housing 2. The elastic member 17 in the embodiment of the present application is a wave spring. The wave spring has a unique wavy structure that can more evenly distribute stress when subjected to force, thereby improving its fatigue resistance. Compared with traditional linear springs, the wave spring has reduced axial end clearance, longer service life and better stability.

[0032] Therefore, when a gap is generated between the main rotating shaft 3 and the damping bushing 16 after a specific number of cycles, the elastic member 17 in the compressed state applies a force to the main rotating shaft 3, pushing the main rotating shaft 3 to move along the annular cone hole, so that the main rotating shaft 3 and the damping bushing 16 are still tightly fitted, compensating for the wear gap, reducing the possibility of shaking of the display screen 4, and at the same time, the damping value attenuation ratio is small, thereby improving the operating stability and reliability of the display screen 4. Compared with the influence of thermal stress changes on the damping value in the traditional scheme, the embodiment of the present application can use a wave spring to make linear adjustment to the damping value, and at the same time, the damping value of the damping unit is less affected by high and low temperatures.

[0033] Reference Figure 2 and Figure 3 The limiting assembly includes several anti-rotation blocks 18 arranged on the outer edge of the damping bushing 16. The several anti-rotation blocks 18 are evenly distributed along the outer circumference of the damping bushing 16. The shell 2 is provided with several anti-rotation grooves that match the size of the anti-rotation blocks 18. The several anti-rotation blocks 18 are respectively inserted into the several anti-rotation grooves. The anti-rotation grooves limit the position of the anti-rotation blocks 18, reduce the possibility of relative rotation between the damping bushing 16 and the shell 2, and improve the stability of the connection between the damping bushing 16 and the shell 2.

[0034] Reference Figure 2 and Figure 3 The main rotating shaft 3 and the housing 2 are rotatably connected via a thrust bearing 19. The elastic member 17 is pressed tightly between the thrust bearing 19 and the housing 2. The thrust bearing 19 provides rotational support under axial load, reducing friction and wear, and improving the stability of the operation of the main rotating shaft 3. A backing ring 20 is installed on the outer edge of the main rotating shaft 3. The backing ring 20 is pressed tightly between the thrust bearing 19 and the elastic member 17. The backing ring 20 is used to separate the thrust bearing 19 and the elastic member 17, reducing the possibility of interference between the two and reducing the friction loss between the thrust bearing 19 and the elastic member 17. The main rotating shaft 3 and the housing 2 are rotatably connected via a needle bearing 21. The needle bearing 21 is located between the display screen 4 and the damping bushing 16. The needle bearing 21 is mainly used to support the main rotating shaft 3, maintain the normal working position and rotation accuracy of the main rotating shaft 3, and transmit torque, share loads, and reduce the friction coefficient, further improving the transmission efficiency and operational stability of the main rotating shaft 3.

[0035] Reference Figure 2 and Figure 5The mounting frame 1 is bolted to a lock housing 27, within which a lock tongue 23 is slidably connected. A lock slot 24 corresponding to the position of the lock tongue 23 is provided on the display screen 4, and the end of the lock tongue 23 facing the display screen 4 is inserted into the lock slot 24. The lock housing 27 is provided with a drive assembly for driving the lock tongue 23 to slide. The drive assembly includes a second drive motor provided on the lock housing 27, and a third worm is coaxially provided at the output end of the second drive motor. A sixth gear 25 is rotatably connected to the lock housing 27, and the third worm is transmission-connected to the sixth gear 25 via a second transmission gear set. A rack 26 of a size matching the sixth gear 25 is fixedly connected to the lock tongue 23, and the sixth gear 25 is meshed with the rack 26. In the embodiment of the present application, the second transmission gear set can be configured with reference to the structure of the first transmission gear set, or the number of gears in the second transmission gear set can be adaptively adjusted according to the actual number of gears on site.

[0036] Therefore, the second drive motor is started, driving the third worm gear at the output end of the second drive motor to rotate, and the third worm gear is connected to the sixth gear 25 through the second transmission gear set, driving the sixth gear 25 to rotate. Since the sixth gear 25 is engaged with the rack 26, the rotation of the sixth gear 25 drives the lock tongue 23 to slide, thereby locking the display screen 4, reducing the possibility of accidental folding of the display screen 4 under the action of external force when the display screen 4 is in the closed state, and improving the stability of the display screen 4 in the closed state.

[0037] In addition, in the prior art, the position detection of the display screen 4 is mainly achieved by adding a gear set to the slave rotating shaft 22, and then using an encoder for on-axis detection. Due to the inherent defects of the gear transmission gap, there is a large error in the position detection, and the structure is cumbersome, occupying a large area in the vehicle. In the embodiment of the present application, an on-axis magnetic encoder 28 is installed on the first drive motor 5 at the position end of the main rotating shaft 3, and an off-axis linear Hall magnetic encoder is coaxially installed at the position end of the slave rotating shaft 22. Both can perform accurate position detection and form a position feedback closed loop, providing more effective detection values for the development of the angle detection and anti-pinch function of the display screen 4. In the embodiment of the present application, the off-axis linear Hall magnetic encoder can directly detect the rotational position of the output end display screen 4 without the need to set up a gear set for detection. It has a simple structure and more accurate detection results for the position of the display screen 4, meeting the use requirements of the narrow space inside the vehicle.

[0038] The implementation principle of the embodiment of the present application is as follows: the drive motor is started, which drives the first worm 6 at the output end of the drive motor to rotate. The first worm 6 drives the first worm wheel 9 to rotate. The first worm wheel 9 drives the second worm 8 to rotate. The second worm 8 drives the second worm wheel 11 to rotate, thereby driving the first gear 10 to rotate synchronously. The first gear 10 then drives the second gear 12 to rotate. Since the second gear 12 and the fourth gear 14 are coaxially arranged, the second gear 12 drives the fourth gear 14 to rotate. The fourth gear 14 drives the third gear 13 to rotate synchronously. Since the third gear 13 is meshed with the fifth gear 7, the third gear 13 drives the fifth gear 7 to rotate, thereby driving the main rotating shaft 3 to rotate synchronously, realizing the folding of the display screen 4. The use of a multi-stage gear transmission method can achieve a high transmission ratio and torque transmission within a limited space. The structure is compact, the stability is good, and the transmission efficiency is high.

[0039] When a gap is generated between the main rotating shaft 3 and the damping bushing 16 after a specific number of cycles, the elastic member 17 in the compressed state applies a force to the main rotating shaft 3, pushing the main rotating shaft 3 to move along the annular cone hole, so that the main rotating shaft 3 and the damping bushing 16 are still tightly fitted, compensating for the wear gap, reducing the possibility of shaking of the display screen 4, and at the same time, the damping value attenuation ratio is small, thereby improving the operating stability and reliability of the display screen 4. Compared with the influence of thermal stress changes on the damping value in traditional solutions, the embodiment of the present application can use a wave spring to make linear adjustment to the damping value, and at the same time, the damping value of the damping unit is less affected by high and low temperatures.

[0040] An embodiment of the present application also discloses a vehicle comprising the above-mentioned ceiling screen device.

[0041] This specific embodiment is merely an explanation of the present invention and is not intended to limit the present invention. After reading this specification, those skilled in the art may make non-creative modifications to this embodiment as needed. However, as long as such modifications are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A ceiling screen device, characterized in that: The invention comprises a mounting frame (1), wherein a shell (2) is provided on the mounting frame (1), a main rotating shaft (3) is rotatably connected in the shell (2), the main rotating shaft (3) is arranged on a display screen (4), a driving unit for driving the main rotating shaft (3) to rotate is provided on the mounting frame (1), and a damping unit for eliminating transmission clearance of the main rotating shaft (3) is provided on the mounting frame (1); The drive unit comprises a first drive motor (5) arranged on the housing (2), the output end of the first drive motor (5) being in transmission connection with the main rotating shaft (3) via a transmission assembly; The damping unit comprises an annular cone block (15) arranged on the outer edge of the main rotating shaft (3); a damping bushing (16) is provided on the shell (2); an annular cone hole matching the annular cone block (15) is opened on the damping bushing (16); the annular cone block (15) is located at the inner edge of the annular cone hole and contacts the hole wall of the annular cone hole; an elastic member (17) is sleeved on the end of the main rotating shaft (3) away from the display screen (4); the elastic member (17) is tightly pressed between the main rotating shaft (3) and the shell (2); and a limit assembly for limiting the rotation of the damping bushing (16) relative to the shell (2) is provided on the shell (2).

2. The ceiling screen device according to claim 1, characterized in that: The transmission assembly comprises a first worm (6) arranged at the output end of the first drive motor (5); a fifth gear (7) is fixedly sleeved on the outer edge of the main rotating shaft (3); the first worm (6) is transmission-connected to the fifth gear (7) through a first transmission gear set; the first transmission gear set comprises a second worm (8) rotatably connected in the housing (2); one end of the second worm (8) is fixedly sleeved with a first worm wheel (9); the first worm (6) and the first worm wheel (9) are meshed with each other; and the housing (2) is respectively rotatably connected to a first gear (10) and a second worm gear (11), the second worm gear (11) and the first gear (10) are coaxially arranged and the second worm gear (11) and the second worm (8) are meshed with each other, the housing (2) is rotatably connected to a second gear (12), a third gear (13) and a fourth gear (14), the second gear (12) and the fourth gear (14) are coaxially arranged, the second gear (12) and the first gear (10) are meshed with each other, the fourth gear (14) and the third gear (13) are meshed with each other, and the third gear (13) and the fifth gear (7) are meshed with each other.

3. The ceiling screen device according to claim 1, characterized in that: The limiting assembly includes a plurality of anti-rotation blocks (18) arranged on the outer edge of the damping bushing (16); a plurality of anti-rotation grooves matching the anti-rotation blocks (18) are opened on the housing (2); and the plurality of anti-rotation blocks (18) are respectively inserted into the plurality of anti-rotation grooves.

4. The ceiling screen device according to claim 1, characterized in that: The main rotating shaft (3) and the housing (2) are rotationally connected via a thrust bearing (19), and the elastic member (17) is tightly pressed between the thrust bearing (19) and the housing (2).

5. The ceiling screen device according to claim 4, characterized in that: A backing ring (20) is provided on the outer edge of the main rotating shaft (3), and the backing ring (20) is tightly pressed between the thrust bearing (19) and the elastic member (17).

6. The ceiling screen device according to claim 1, characterized in that: The main rotating shaft (3) and the housing (2) are rotatably connected via a needle bearing (21), and the needle bearing (21) is located between the display screen (4) and the damping bushing (16).

7. The ceiling screen device according to claim 1, characterized in that: The display screen (4) is provided with a slave rotating shaft (22), the main rotating shaft (3) and the slave rotating shaft (22) are respectively located on both sides of the display screen (4) and are coaxially arranged, and the end of the slave rotating shaft (22) facing away from the display screen (4) is rotatably connected to the mounting frame (1).

8. The ceiling screen device according to claim 1, characterized in that: The mounting frame (1) is provided with a lock shell (27), a lock tongue (23) is slidably connected in the lock shell (27), a lock slot (24) corresponding to the lock tongue (23) is provided on the display screen (4), one end of the lock tongue (23) facing the display screen (4) is inserted into the lock slot (24), and a driving component for driving the lock tongue (23) to slide is provided on the lock shell (27).

9. The ceiling screen device according to claim 8, characterized in that: The drive assembly includes a second drive motor arranged on a lock housing (27); a third worm is coaxially arranged on the output end of the second drive motor; a sixth gear (25) is rotatably connected to the lock housing (27); the third worm is transmission-connected to the sixth gear (25) through a second transmission gear set; a rack (26) matching the sixth gear (25) is provided on the lock tongue (23); and the sixth gear (25) is meshedly connected to the rack (26).

10. The ceiling screen device according to claim 7, characterized in that: An on-axis magnetic encoder (28) is provided on the first drive motor (5), and an off-axis encoder is provided on the end of the rotating shaft (22) facing away from the display screen (4).

11. A vehicle, characterized in that: It comprises the ceiling screen device according to any one of claims 1 to 10.

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