Clutch gear set, gearbox, display device and vehicle

Abstract

The utility model relates to the technical field of vehicle-mounted screens, in particular to a clutch gear set, a gearbox, a display device and a vehicle. The utility model provides a clutch gear set. The clutch gear set comprises a gear shaft; the two gears are sleeved on the gear shaft; the clamping assemblies are connected to the gear shaft and located on the sides, opposite to the other gear, of the two gears respectively. The counteracting component is arranged between the gear and the clamping assembly so as to counteract the friction force between the gear and the clamping assembly; the clamping assembly enables the two gears to abut against each other oppositely, so that the two gears can rotate synchronously depending on the friction force between the two gears. When any one of the two gears is locked, the other gear can overcome the friction force between the two gears to rotate under the action of external force. The display screen has the overturning function and the manual overturning function at the same time through the clutch gear set, the controllability of overturning the display screen is improved, the display screen can be fixed to any position, and meanwhile the watching experience is improved.

Description

Technical Field

[0001] This patent relates to the field of vehicle-mounted screen technology, and in particular to a clutch gear set, a gear box, a display device and a vehicle. Background Art

[0002] Car TVs are usually installed in public transportation such as buses, subways and taxis. With the improvement of living standards, some private cars will also be equipped with car TVs to improve the riding experience of passengers.

[0003] The space inside the car is limited. In order to save space and reduce the risk of safety accidents caused by passengers accidentally colliding with the car TV, car TVs generally have a flip function, which allows the screen to be flipped and unfolded when needed, and folded and stored when not needed.

[0004] The current flipping modes of car ceiling TVs can be divided into manual flipping and electric flipping, but few similar products can support both electric flipping and manual flipping at the same time.

[0005] Based on the above problems, the present invention makes improvements thereto. Summary of the invention

[0006] In order to solve or at least partially solve the above technical problems, this patent provides a clutch gear set, a gear box, a display device and a vehicle.

[0007] The first aspect of the present invention discloses a clutch gear set, comprising:

[0008] Gear shaft;

[0009] Two gears are both sleeved on the gear shaft;

[0010] A clamping assembly connected to the gear shaft and located on the side of the two gears opposite to the other gear;

[0011] A counteracting component is disposed between the gear and the clamping assembly to counteract the friction between the gear and the clamping assembly;

[0012] The clamping assembly presses the two gears toward each other, allowing the two gears to rotate synchronously relying on the friction between them;

[0013] When any one of the two gears is locked, the other gear can rotate under the action of external force to overcome the friction between the two gears.

[0014] Optionally, in the above clutch gear set, the offset component comprises:

[0015] The balls are accommodated in ball grooves provided on the gears and / or the clamping components to offset the friction between the gears and the clamping components through rolling friction.

[0016] Optionally, in the above clutch gear set, the offset component comprises:

[0017] Two magnets are respectively arranged on the clamping assembly and the gear with the same poles facing each other. The two magnets repel each other to provide a pressing force for the gear in a non-contact state.

[0018] Optionally, in the above clutch gear set, a cylindrical boss is provided on the end face of the gear, and the offset component further comprises:

[0019] A sealing sleeve, one end of which is closed and the other end of which forms a cylindrical groove, in which gas or liquid is reserved;

[0020] The boss is inserted into the cylindrical groove and forms a gas or liquid separation layer between the boss and the closed end of the sealing sleeve.

[0021] Optionally, in the above clutch gear set, a friction plate is further provided between the two gears, or the contact surfaces of the two gears are rough surfaces.

[0022] Optionally, in the above clutch gear set, the clamping assembly comprises:

[0023] A clamping member and an elastic member, wherein the clamping member is fixedly arranged on the gear shaft, and the elastic member is arranged between the clamping member and the offsetting member.

[0024] Optionally, in the above clutch gear set, the clamping members corresponding to the two gears are one or a combination of any two of the following types of clamping members:

[0025] A nut mounted on the thread provided on the gear shaft;

[0026] A shaft head integrally formed on the gear shaft;

[0027] A limiting boss formed on the housing, the housing is used to provide a limit for the clutch gear set;

[0028] A limiting fastener is embedded in the shell.

[0029] Optionally, in the above clutch gear set, the clamping assembly further comprises:

[0030] A spacer is disposed between the clamping member and the elastic member.

[0031] The second aspect of this patent discloses a gearbox, comprising: a housing, and a multi-stage gear set arranged in the housing and meshed and connected in sequence, and an output shaft connected to the multi-stage gear set; at least one gear set in the multi-stage gear set is the clutch gear set described in the first aspect of this patent.

[0032] Optionally, in the above gearbox, it further comprises:

[0033] The friction plate is connected to the output shaft so as to rotate synchronously with the output shaft;

[0034] A damping friction plate, arranged on the housing and abutting against the back-eliminating friction plate;

[0035] The friction between the return friction plate and the damping friction plate is eliminated to increase the rotational damping of the output shaft.

[0036] The third aspect of this patent discloses a display device, comprising: a driving motor, a display screen and a gear box as described in the second aspect;

[0037] The driving motor is connected to the multi-stage gear set in the gear box through a worm gear structure, and the display screen is connected to the output shaft of the gear box;

[0038] The driving motor is used to drive the display screen to flip through the gear box;

[0039] The display screen can rotate by overcoming the friction between the two gears of the clutch gear set under the action of external force.

[0040] The fourth aspect of this patent discloses a vehicle on which is installed a display device as described in the third aspect above.

[0041] Compared with the prior art, this patent provides a clutch gear set to enable the display screen to have both electric and manual flipping functions, making the flipping operation of the display screen more flexible for viewers. The display screen can be flipped more stably by providing elastic components and gaskets on the gear shaft of the clutch gear set. The friction plate and damping friction plate are provided on the output shaft and the housing respectively, so that the display screen can remain stable after being rotated to any position, increasing the viewing range and improving the viewing experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the implementation of this patent, the following is a brief introduction to the relevant drawings. It can be understood that the drawings described below are only used to illustrate some implementations of this patent, and ordinary technicians in this field can also obtain many other technical features and connection relationships not mentioned in this article based on these drawings.

[0043] Figure 1 It is a three-dimensional schematic diagram of a gear box according to an embodiment of the present patent;

[0044] Figure 2 This is a schematic diagram of the internal structure of a gearbox in an embodiment of the present patent;

[0045] Figure 3 It is a cross-sectional schematic diagram of a gearbox according to an embodiment of the present patent;

[0046] Figure 4It is a cross-sectional schematic diagram of a clutch gear set in an embodiment of the present patent;

[0047] Figure 5 It is a schematic diagram of a compensation component of an embodiment of the present patent;

[0048] Figure 6 It is a schematic diagram of another offset component of the embodiment of the present patent;

[0049] Description of reference numerals:

[0050] A. Gear box;

[0051] 1. Clutch gear set; 11. Gear shaft; 111. Shaft head; 12. Gear; 121. Ball groove;

[0052] 122, boss; 13, clamping assembly; 131, clamping member; 1311, nut; 1312, limiting boss;

[0053] 1313, limit fastener; 132, elastic component; 133, gasket; 14, offset component; 141, ball;

[0054] 142, sealing sleeve; 143, magnet; 15, partition layer;

[0055] 2. Shell;

[0056] 3. Input gear set;

[0057] 4. Output gear set;

[0058] 5. Output shaft;

[0059] 6. Eliminate friction plate;

[0060] 7. Damping friction plate;

[0061] 8. Drive motor. DETAILED DESCRIPTION

[0062] The patent is described in detail below in conjunction with the accompanying drawings.

[0063] In previous designs, when the car screen is designed with a flip function, it often only supports one flipping method: electric or manual. Manual flipping is not very convenient, and electric flipping is prone to damage when it is directly turned by hand. In the technical field of car screens, the existing technology lacks a reasonable design that can take into account both manual and automatic flipping functions.

[0064] The inventor of this patent analyzed the cause of this problem and believed that the prior art lacks a clutch structure suitable for the field of vehicle-mounted screens.

[0065] In view of the above problems, the utility model designs a clutch gear set, a gear box, a display device and a vehicle. Please refer to the following embodiments:

[0066] Implementation Method 1

[0067] The first embodiment of the present invention discloses a clutch gear set 1, see Figure 4 As shown, the clutch gear set 1 includes:

[0068] Gear shaft 11;

[0069] Two gears 12 are both sleeved on the gear shaft 11;

[0070] The clamping assembly 13 is connected to the gear shaft 11 and is located on the side of the two gears 12 opposite to the other gear 12;

[0071] The offset component 14 is arranged between the gear 12 and the clamping assembly 13 to offset the friction between the gear 12 and the clamping assembly 13;

[0072] The clamping assembly 13 presses the two gears 12 toward each other, so that the two gears 12 can rotate synchronously relying on the friction between them;

[0073] When any one of the two gears 12 is locked, the other gear 12 can rotate under the action of external force to overcome the friction between the two gears 12 .

[0074] Based on the above technical solution, in the embodiment of the present invention, a gear box A is also proposed, see Figure 1 and Figure 2 As shown, it comprises: a housing 2, a multi-stage gear set arranged in the housing 2 and meshed and connected in sequence, and an output shaft 5 connected to the multi-stage gear set;

[0075] In some embodiments, the multi-stage gear set includes an input gear set 3, a clutch gear set 1, and an output gear set 4;

[0076] The input gear set 3 has a worm gear structure, or the input gear set 3 is used to connect with a worm gear extending from the driving motor 8 .

[0077] The gearbox A may include a housing 2, in which an input gear set 3, a clutch gear set 1, an output gear set 4 and an output shaft 5 may be disposed. The input gear set 3 may be meshed and connected with the clutch gear set 1, the clutch gear set 1 may be meshed and connected with the output gear set 4, and the output gear set 4 may be meshed and connected with the output shaft 5.

[0078] It should be understood that the clutch gear set 1 can be arranged as any one-stage gear set in a multi-stage gear set as required. For example, the clutch gear set 1 can be connected to the output shaft or to the worm gear.

[0079] Based on the above technical solution, in the implementation of this patent, a display device is also proposed, including: a driving motor 8, a display screen and a gear box A;

[0080] The driving motor 8 is connected to the input gear set 3 of the gear box A through a worm gear structure, and the display screen is connected to the output shaft 5 of the gear box A; the connection between the display screen and the output shaft 5 can be a direct connection or an indirect connection, that is, an indirect connection is achieved through other structures.

[0081] The driving motor 8 is used to drive the display screen to flip through the gear box A;

[0082] When the driving motor 8 is not powered on, the worm gear structure is self-locking, and the display screen can rotate under the action of external force to overcome the friction between the two gears 12 of the clutch gear set 1.

[0083] Based on the above technical solution, in the implementation mode of this patent, a vehicle is also proposed, on which the above-mentioned display device is installed.

[0084] For example, the means of transportation may be a car, train, airplane, ship, etc. The means of transportation equipped with the aforementioned display device can enable passengers to flip the display screen for viewing by electric control or manual flipping, making the operation of the display screen more flexible and convenient for the passengers while improving the passenger experience.

[0085] For clutch structures, see Figure 4 As shown, the clutch gear set 1 may include a gear shaft 11, two gears 12, a clamping assembly 13 and a compensation component 14. The two gears 12 may contact each other and be sleeved on the gear shaft 11, and the clamping assembly 13 may be connected to the gear shaft 11 and may be respectively located on the side of the two gears 12 opposite to the other gear 12. That is, when the two gears 12 are sleeved on the gear shaft 11 as a whole, the clamping assembly 13 connected to the gear shaft 11 may be divided into two parts, and may be respectively arranged on the left and right sides of the two gears 12 to hold the two gears 12 in the middle of the clamping assembly 13.

[0086] A counteracting component 14 may be provided between the clamping assembly 13 and the gear 12 adjacent thereto to counteract the friction between the gear 12 and the clamping assembly 13. Since the clamping assembly 13 is divided into two parts, which are respectively provided on the left and right sides of the two gears 12, two counteracting components 14 may be provided accordingly, and the two counteracting components 14 are respectively provided on the left and right sides of the two gears 12 and clamped between the clamping assembly 13 and the gear 12.

[0087] In an optional embodiment, the offsetting component 14 can be a lubricating material. By adding a lubricating material, such as lubricating oil, between the gear 12 and the clamping assembly 13, the roughness of the contact surface between the two can be reduced, thereby significantly reducing the friction between the gear 12 and the clamping assembly 13.

[0088] In addition, the clamping assembly 13 can apply pressure to the two gears 12 sandwiched between the gear shaft 11, so that the two gears 12 are pressed against each other. When one of the gears 12 is rotated by an external force, the other gear 12 can be rotated synchronously by the static friction between the two gears 12, so that the two gears 12 rotate at the same speed and in the same direction. At the same time, the pressure between the two gears 12 is not too large. When any one of the two gears 12 is locked and cannot rotate, the other gear 12 can overcome the friction between the two gears 12 under the action of an external force and rotate alone.

[0089] The inventor of this patent found that when the clutch device is designed using traditional ideas, the clutch device is often designed on the screen flip spindle, and the connection between the screen and the spindle is generally indirectly connected through the clutch device. Under this premise, the clutch torque of the spindle must be greater than the screen's own gravity torque. However, the available space for the spindle is small, and it may be difficult to achieve actual needs due to structural space limitations, resulting in an unreliable screen installation and an increased risk of screen shaking and making abnormal noises; therefore, this design idea has high requirements on the strength of the material itself, which increases product costs.

[0090] Compared with the traditional design concept, this patent provides more space for the connection between the screen and the main shaft by designing the clutch device as a clutch gear set 1 located in the gear box A, so that the connection design between the main shaft and the screen can be tighter and more reliable, avoiding the problem of shaking and abnormal noise of the screen due to the clutch device being designed on the main shaft.

[0091] In addition, this patent utilizes the step-by-step change characteristics of the gear transmission torque of gear box A to convert the larger clutch torque at the main shaft end into the smaller clutch torque of the secondary gear set, making the design structure more streamlined and occupying less space. At the same time, it reduces the product's requirements for material strength and reduces product costs.

[0092] For gearbox A, the input gear set 3 can be connected to the drive motor 8. Therefore, the input gear set 3 can be provided with a worm gear structure, and the motor shaft of the drive motor 8 can be connected to the worm structure of the input gear set 3. While changing the direction of the transmission force of the drive motor 8, the high speed and low torque of the worm connected to the motor shaft of the drive motor 8 can be converted into a low speed and high torque of the worm wheel of the input gear set 3.

[0093] When the motor shaft of the driving motor 8 has a worm structure, the input gear set 3 is only provided with a turbine and connected to the worm of the driving motor 8. This can also achieve the effect of converting the high speed and low torque of the driving motor 8 into the low speed and high torque of the turbine on the input gear set 3, thereby driving other mechanisms meshing with the input gear set 3 to rotate.

[0094] For the display device, it may include a drive motor 8, a display screen and a gear box A. The drive motor 8 may be connected to the input gear set 3 of the gear box A through a worm gear structure, and the display screen may be connected to the output shaft 5 of the gear box A. The worm gear structure may be separately arranged on the drive motor 8 and the input gear set 3. When the drive motor 8 is powered on, the drive motor 8 may drive the display screen to flip through the gear box A. When the drive motor 8 is not powered on or stops driving, the worm gear structure has a self-locking function, so the input gear set 3 connected to the drive motor 8 through the worm gear structure will stop transmitting, and at this time, the display screen can rotate under the action of external force to overcome the friction between the two gears 12 of the clutch gear set 1. In short, when the drive motor 8 is powered on, the drive motor 8 may be controlled to drive the display screen to flip, and when the drive motor 8 is not powered on, the display screen may be flipped manually. The display device arranged as above enables the display screen to have the function of flipping in both electronically controlled and manually controlled ways.

[0095] Implementation Method 2

[0096] This embodiment is a further improvement on the first embodiment, and its improvement lies in that an implementation structure of a clutch gear set 1 is provided. Specifically, see Figure 4 As shown:

[0097] The offset component 14 of this embodiment includes:

[0098] The ball 141 is accommodated in the ball groove 121 provided on the gear 12 and / or the clamping assembly 13 to offset the friction between the gear 12 and the clamping assembly 13 through rolling friction.

[0099] The offsetting component 14 may include a ball 141, and a ball groove 121 may be provided on either the gear 12 or the clamping assembly 13 to accommodate the ball 141. When the ball groove 121 is provided on the gear 12 to accommodate the ball 141, the sliding friction between the clamping assembly 13 and the gear 12 may be converted into rolling friction by the rolling of the ball 141, so that the gear 12 is easier to rotate between the clamping assembly 13. When the ball groove 121 is provided on the clamping assembly 13, the clamping assembly 13 needs to have a certain radial thickness to accommodate the ball groove 121. The ball groove 121 may also be provided on the gear 12. Of course, the ball groove 121 may also be provided between the two gears 12 and their corresponding clamping assemblies 13 to accommodate the ball 141, so as to synchronously offset the friction between the gear 12 and the clamping assembly 13.

[0100] In an optional embodiment, when the thickness of the gear 12 and the clamping assembly 13 are both small, ball grooves 121 can be opened on both the gear 12 and the clamping assembly 13 to accommodate the same set of balls 141, thereby offsetting the friction between the gear 12 and the clamping assembly 13.

[0101] Implementation Method 3

[0102] This embodiment is substantially the same as the second embodiment, with the main difference being that, in this embodiment, another available structure of the offset component is provided.

[0103] Specifically, see Figure 5 As shown, the compensation component 14 includes:

[0104] Two magnets 143 are respectively disposed on the clamping assembly 13 and the gear 12 with the same poles facing each other. The two magnets 143 repel each other to provide a pressing force for the gear 12 in a non-contact state.

[0105] In an optional embodiment, the offsetting component 14 may include two magnets 143. One magnet 143 may be provided on the clamping assembly 13, and another magnet 143 may be provided on the gear 12 corresponding to the clamping assembly 13 with the same poles facing each other. That is to say, the ends of the two magnets 143 with the same magnetic poles provided on the clamping assembly 13 and the gear 12 face each other, generating a mutually repelling magnetic force, thereby constraining the two gears 12 between the clamping assembly 13. In this way, when the clamping assembly 13 is not in contact with the gear 12, the repulsive force of the magnet 143 can also be used to clamp the gear 12 between the clamping assembly 13, so that the two gears 12 are pressed against each other, and relative to the rotation of the ball 141, the way of installing the two magnets 143 can generate a gap between the gear 12 and the clamping assembly 13, thereby eliminating the friction between the gear 12 and the clamping assembly 13.

[0106] Implementation Method 4

[0107] The present embodiment is substantially the same as the second or third embodiment, the main difference being that, in the present embodiment, another available structure of the offsetting component 14 is provided.

[0108] Specifically, see Figure 6 As shown, a cylindrical boss 122 is provided on the end surface of the gear 12, and the offset component 14 also includes:

[0109] A sealing sleeve 142, one end of which is closed and the other end of which forms a cylindrical groove, in which gas or liquid is reserved;

[0110] The boss 122 is inserted into the cylindrical groove, and a gas or liquid separation layer 15 is formed between the boss 122 and the closed end of the sealing sleeve 142 .

[0111] A cylindrical boss 122 may be provided on the end face of the gear 12, and the offset component 14 may include a sealing sleeve 142. Specifically, one end of the sealing sleeve 142 is closed, and the other end forms a cylindrical groove, in which gas or liquid may be reserved. The boss 122 on the gear 12 may be inserted into the cylindrical groove of the sealing sleeve 142, and a gas or liquid separation layer 15 may be formed between the boss 122 and the sealing sleeve 142. The closed end of the sealing sleeve 142 may be integrally formed on the inner wall of the housing 2. For example, two sealing sleeves 142 may be integrally formed on opposite side walls in the housing 2, and the two sealing sleeves 142 may be coaxially arranged, and the two gears 12 may be inserted into the sealing sleeve 142 through their respective bosses 122. On the one hand, the boss 122 can be inserted into the sealing sleeve 142 to compress the gas or liquid in the partition layer 15 to indirectly apply a resistance force to the gear 12, which can replace the function of the clamping assembly; on the other hand, in the direction of the gear shaft 11, the clamping assembly 13 has no direct contact with the gear 12, so that the friction force on the gear 12 is smaller, which is beneficial to the rotation of the gear 12.

[0112] Implementation Method 5

[0113] This embodiment is a further improvement of any one of the first to fourth embodiments, and the main improvement is that, in this embodiment, the structure of the clutch gear set 1 is further improved.

[0114] Specifically, in the clutch gear set, a friction plate is provided between the two gears 12, or the contact surfaces of the two gears 12 are rough surfaces.

[0115] In some embodiments, a friction plate can be set between the two gears 12. Since the two gears 12 are subjected to the thrust of the clamping assembly 13, when one of the gears 12 rotates, the friction plate between the two gears 12 can drive the other gear 12 to rotate through the static friction force generated between the two gears 12, and setting friction plates with different roughness can also conveniently control the static friction force between the two gears 12.

[0116] In an optional embodiment, the contact surface between the two gears 12 can be directly changed to a rough surface with a certain roughness to replace the friction plate to provide the friction force between the two gears 12.

[0117] Implementation Method 6

[0118] This embodiment is a further improvement of any one of the first to fifth embodiments, and the main improvement is that, in this embodiment, the structure of the clamping assembly 13 is further improved.

[0119] Specifically, see Figure 4 As shown, the clamping assembly 13 includes:

[0120] The clamping member 131 and the elastic member 132 , the clamping member 131 is fixedly disposed on the gear shaft 11 , and the elastic member 132 is disposed between the clamping member 131 and the offsetting member 14 .

[0121] The clamping assembly 13 includes a clamping member 131 and an elastic member 132. The clamping member 131 is fixedly arranged on both sides of the two gears 12 on the gear shaft 11, and is used to clamp the two gears 12. The elastic member 132 is arranged between the clamping member 131 and the offsetting member 14. Specifically, one side of the elastic member 132 covers the ball 141 of the offsetting member 14, and the other side contacts the clamping member 131. On the one hand, the elastic member 132 can bear and disperse the force between the offsetting member 14 and the clamping member 131, and play a role in buffering and shock absorption; on the other hand, the elastic member 132 can provide a certain degree of elasticity and adjustability, so that the contact between the offsetting member 14 and the clamping assembly 13 is more stable and reliable.

[0122] Implementation Method 7

[0123] This embodiment is a further improvement of any one of the first to sixth embodiments, and the main improvement is that, in this embodiment, the structure of the clamping member 131 is further improved.

[0124] Specifically, see Figure 3 , Figure 4 and Figure 5 As shown, the clamping members 131 corresponding to the two gears 12 are one of the following types of clamping members 131 or a combination of any two of them:

[0125] A nut 1311 mounted on the thread formed on the gear shaft 11;

[0126] A shaft head 111 integrally formed on the gear shaft 11;

[0127] A limiting boss 1312 formed on the housing 2, the housing 2 is used to provide a limit for the clutch gear set 1;

[0128] A limiting fastener 1313 is embedded in the housing 2 .

[0129] The clamping member 131 is arranged at both ends of the gear shaft 11. Specifically, the clamping member 131 can be a nut 1311 on the thread opened on the gear shaft 11, and the two gears 12 can be clamped by adjusting the nut 1311; the clamping member 131 can also be a shaft head 111 integrally formed on the gear shaft 11, that is, a cylinder with a diameter larger than the diameter of the gear shaft 11 arranged at one end of the gear shaft 11, and the integrally formed shaft head 111 has the advantage of a stable structure; the clamping member 131 can also be a limiter formed on the housing 2 The limiting boss 1312 can be formed on the inner side of the housing 2, and a hole groove for accommodating one end of the gear shaft 11 is provided in the middle of the limiting boss 1312. The limiting boss 1312 can provide axial limiting for the gear shaft 11 and the gear 12 at the same time; the clamping member 131 can also be a limiting fastener 1313 embedded in the housing 2, that is, a hole groove is directly provided on the inner side wall of the housing 2, and the hole groove is used to accommodate one end of the gear shaft 11, and the inner side wall of the housing 2 axially limits the gear 12. The two ends of the gear shaft 11 can respectively use any two of the above-mentioned nut 1311, shaft head 111, limiting boss 1312 and limiting fastener 1313 as a combination of the clamping member 131.

[0130] Implementation Method 8

[0131] The present embodiment is a further improvement of any one of the first to seventh embodiments, and the main improvement is that, in the present embodiment, the structure of the clamping assembly 13 is further improved.

[0132] Specifically, see Figure 4 As shown, the clamping assembly 13 may also include:

[0133] The gasket 133 is arranged between the clamping member 131 and the elastic member 132. The gasket 133 can further buffer the vibration between the clamping assembly 13 and the offset member 14, and help adjust the position and balance between the offset member 14, the gear 12 and the clamping member 131.

[0134] In an optional embodiment, the gasket 133 may be a disc-shaped gasket, that is, a gasket 133 having a disc shape. Compared with ordinary gaskets, the elastic modulus of the disc-shaped gasket is higher, and it can provide better compression and recovery performance and has better adaptability. When the dish mouth of the disc-shaped gasket faces the elastic component 132, the butterfly gasket can adapt to the elastic deformation of the elastic component 132, so that the pressure can be more evenly distributed on the contact surface between the elastic component 132 and the disc-shaped gasket.

[0135] Implementation Method 9

[0136] This embodiment is a further improvement of any one of the first to eighth embodiments. The main improvement is that, in this embodiment, the structure of the gear box A is further improved. Specifically, see Figure 3 As shown, the gearbox A may include:

[0137] The friction plate 6 is connected to the output shaft 5 so as to rotate synchronously with the output shaft 5;

[0138] A damping friction plate 7, which is arranged on the housing 2 and abuts against the back-eliminating friction plate 6;

[0139] The friction plate 6 and the damping friction plate 7 rub against each other to increase the rotation damping of the output shaft 5. When the display screen rotates around the main axis, a certain external force needs to be applied to overcome the friction between the friction plate 6 and the damping friction plate 7 to rotate, which is beneficial for viewers to adjust the display screen to a suitable angle as needed, so that the display screen can stay at the current position without rotating due to its own gravity or the vibration of the vehicle, which is beneficial for viewers to watch the content played on the display screen from more positions, thereby improving the viewing experience of viewers.

[0140] Finally, it should be noted that ordinary technicians in this field can understand that in order to make readers better understand this patent, the implementation methods of this patent propose many technical details. However, even without these technical details and various changes and modifications based on the above-mentioned implementation methods, the technical solutions claimed for protection by the claims of this patent can be basically realized. Therefore, in practical applications, various changes can be made to the above-mentioned implementation methods in form and details without departing from the spirit and scope of this patent.

Claims

1. A clutch gear set, characterized in that: include: Gear shaft; Two gears are both sleeved on the gear shaft; A clamping assembly connected to the gear shaft and located on a side of the two gears opposite to the other gear; A counteracting component, disposed between the gear and the clamping assembly to counteract the friction between the gear and the clamping assembly; The clamping assembly causes the two gears to press against each other, so that the two gears can rotate synchronously relying on the friction force between them; When any one of the two gears is locked, the other gear can rotate under the action of external force to overcome the friction between the two gears.

2. The clutch gear set according to claim 1, characterized in that: The offset component comprises: The ball is accommodated in a ball groove provided on the gear and / or the clamping assembly to offset the friction between the gear and the clamping assembly through rolling friction.

3. The clutch gear set according to claim 1, characterized in that: The offset component comprises: Two magnets are respectively arranged on the clamping assembly and the gear with the same poles facing each other. The two magnets repel each other to provide a pressing force for the gear in a non-contact state.

4. The clutch gear set according to claim 1, characterized in that: A cylindrical boss is provided on the end surface of the gear, and the offset component further comprises: A sealing sleeve, one end of which is closed and the other end of which forms a cylindrical groove, wherein gas or liquid is reserved in the cylindrical groove; The boss is inserted into the cylindrical groove, and a gas or liquid separation layer is formed between the boss and the closed end of the sealing sleeve.

5. The clutch gear set according to claim 1, characterized in that: A friction plate is also arranged between the two gears, or the contact surfaces of the two gears are rough surfaces.

6. The clutch gear set according to any one of claims 1 to 5, characterized in that: The clamping assembly comprises: A clamping member and an elastic member, wherein the clamping member is fixedly arranged on the gear shaft, and the elastic member is arranged between the clamping member and the offsetting member.

7. The clutch gear set according to claim 6, characterized in that: The clamping members corresponding to the two gears are one of the following types of clamping members or a combination of any two of them: A nut mounted on the thread formed on the gear shaft; A shaft head integrally formed on the gear shaft; A limiting boss formed on the housing, the housing being used to provide a limit for the clutch gear set; A limiting fastener is embedded in the shell.

8. The clutch gear set according to claim 6, characterized in that: The clamping assembly further comprises: A gasket is disposed between the clamping member and the elastic component.

9. A gear box, characterized in that: It comprises: a housing, a multi-stage gear set arranged in the housing and meshed and connected in sequence, and an output shaft connected to the multi-stage gear set; At least one gear set in the multi-stage gear set is a clutch gear set as claimed in any one of claims 1 to 8.

10. The gearbox according to claim 9, characterized in that Also includes: A friction plate is connected to the output shaft so as to rotate synchronously with the output shaft; A damping friction plate, arranged on the housing and abutting against the back-eliminating friction plate; The return friction plate rubs against the damping friction plate to increase the rotation damping of the output shaft.

11. A display device, characterized in that: include: A driving motor, a display screen and a gear box as claimed in claim 9 or 10; The driving motor is connected to the multi-stage gear set in the gear box through a worm gear structure, and the display screen is connected to the output shaft of the gear box; The driving motor is used to drive the display screen to flip through the gear box; The display screen can rotate under the action of external force by overcoming the friction between the two gears of the clutch gear set.

12. A means of transport, characterized in that: The display device according to claim 11 is installed on the vehicle.

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