Patent Description:
With the increasing requirements of modern cars for entertainment and intelligence, and the increasing popularity of mobile devices, functions and forms of multimedia have become increasingly abundant. A multi-functional and large-size touch screen that can be interconnected with a mobile phone and a computer and connected to the Internet has become the mainstream trend in the future. However, at present, most of the touch screens are fixed directly to an instrument panel in a single mode of horizontal screen or vertical screen. This form cannot achieve equal-scale, full-screen display when facing image resources such as pictures and videos of different specifications, and cannot take into account personal usage habits of different users.

<CIT> describes a vehicle-mounted display screen rotator transmission device which comprises a rotating mechanism according to the preamble of claim <NUM>.

This application is intended to resolve at least one of technical problems in the related art to some extent.

To this end, the present invention provides a rotating mechanism for a display terminal, according to claim <NUM>.

The present invention further provides a vehicle having the rotating mechanism, according to claim <NUM>.

To this end, the rotating mechanism can implement automatic rotation of the display terminal, thereby implementing rotation of the display terminal at any angle or rotation at a preset angle on a plane on which a display screen is located.

Other aspects and advantages of this application will be given in the following description, some of which will become apparent from the following description or may be learned from practices of this application.

The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, and same or similar reference signs in all the accompanying drawings indicate same or similar components or components having same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to explain this application and cannot be construed as a limitation to this application.

A rotating mechanism <NUM> for a display terminal <NUM> according to an embodiment of this application is described in detail below with reference to <FIG>.

As shown in <FIG> and <FIG>, the rotating mechanism <NUM> for the display terminal <NUM> according to the embodiment of this application includes: a base <NUM>, a mounting unit <NUM>, a drive unit <NUM>, and a mounting shaft <NUM>.

The base <NUM> is fixed with the vehicle body, and the mounting unit <NUM> is used to mount the display terminal <NUM>. The mounting unit <NUM> may be fixedly connected to the display terminal <NUM> through a connecting bracket <NUM> disposed on the display terminal <NUM>, and the connecting bracket <NUM> may be integrated on the back of the display terminal <NUM>, or may be detachably connected to the display terminal <NUM>. The connecting bracket <NUM> and the mounting unit <NUM> may be matched through a unified interface, so that display terminals <NUM> of different models or different sizes can be connected to the mounting unit <NUM> through a unified interface, so that the mounting unit <NUM> has better versatility and wider application range.

The mounting unit <NUM> has a first engaging portion <NUM>, and the drive unit <NUM> is sandwiched between the base <NUM> and the mounting unit <NUM> in the axial direction. The drive unit <NUM> has a power output member capable of outputting torque, and the power output member has a second engaging portion 334a. A mounting shaft is pivotally disposed on the base <NUM>, and the mounting shaft is connected to the mounting unit <NUM>, so that the first engaging portion <NUM> and the second engaging portion 334a abut in the axial direction and are in power coupling connection.

It should be noted that the power coupling connection between the first engaging portion <NUM> and the second engaging portion 334a means that the manner in which the first engaging portion <NUM> is connected to the second engaging portion 334a can meet the requirement of stable torque transmission between the two. In other words, during the operation of the drive unit <NUM>, the first engaging portion <NUM> and the second engaging portion 334a always remain relatively stationary.

To this end, the rotating mechanism can implement automatic rotation of the display terminal, thereby implementing rotation of the display terminal at any angle or rotation at a preset angle on a plane on which a display screen is located. In addition, the rotating mechanism implements modularization, good versatility, and convenient disassembly and assembly.

At least a part of clutch unit is located in the mounting unit <NUM>. For example, at least a part of the first engaging portion <NUM> or the second engaging portion 334a in the foregoing embodiment is located in the rotating disk, so that the overall axial length of the rotating mechanism <NUM> can be significantly reduced, the arrangement is more compact and reasonable, and the connection is tighter.

The first engaging portion <NUM> may be splined or formed integrally with the rotating disk as described in the foregoing embodiments. In other alternative embodiments, the first engaging portion <NUM> is constructed such that the rotating disk faces an end surface of the engaging portion 334a, that is, first locking teeth <NUM> are formed on the end surface. In other words, a disk surface of the first engaging portion <NUM> is omitted, thereby reducing the weight of the entire rotating mechanism <NUM>. The first locking teeth <NUM> may be integrally formed on the end surface of the rotating disk facing the second engaging portion 334a, or the locking teeth may be detachably connected to the rotating disk, so that the structure of the rotating disk is simpler, which facilitates molding.

The rotating disk has a first groove at one end facing the first engaging portion <NUM> of the clutch unit, and at least a part of the first engaging portion <NUM> is located in the first groove, to shorten the axial distance of the entire rotating mechanism <NUM>. Preferably, as shown in the figure, the entire first engaging portion <NUM> is located in the first groove, and at least a part of the second engaging portion 334a of the clutch unit is located in the first groove. Further, the entire second engaging portion 334a is located in the first groove to further shorten the axial distance of the entire rotating mechanism <NUM>. The overall axial length of the rotating mechanism <NUM> is short, the arrangement is more compact and reasonable, and the connection is tighter.

Certainly, the rotating disk may also be integrally formed with the first engaging portion <NUM>, which can reduce the number of parts to be assembled and the assembly process.

The rotating mechanism <NUM> further includes a base <NUM>, the drive unit <NUM> is disposed between the base <NUM> and the mounting unit <NUM>, and the mounting unit <NUM> is pivotally connected to at least one of the drive unit <NUM> and the base <NUM>. In this way, when the screen angle of the display terminal <NUM> needs to be rotated and switched, the drive unit <NUM> operates and rotates the power output member to drive the first engaging portion <NUM> and the second engaging portion 334a to rotate synchronously and drive the mounting unit <NUM> to rotate synchronously, to implement rotation, at any angle or at a preset angle on the plane on which the display screen is located, of the display terminal fixedly connected to the mounting unit <NUM>.

In some embodiments, the mounting unit <NUM> includes a rotating disk and a mounting shaft <NUM> connected to the rotating disk, the rotating disk is provided on the drive unit <NUM> and the base <NUM> through the mounting shaft <NUM>. Therefore, the mounting unit <NUM> and the drive unit <NUM> are integrated on the base <NUM> through the mounting shaft. In this way, the base, the mounting unit, and the drive unit are connected in series through the mounting shaft, thereby implementing the modularization of the rotating mechanism and having better universality.

In order to shorten the axial length of the entire rotating mechanism <NUM> and enhance the compactness of the entire mechanism, the drive unit <NUM> is disposed in the base <NUM>, and the mounting shaft <NUM> passes through the base <NUM> and the drive unit <NUM> in turn to be connected to the rotating disk, so that the three are connected in series to maintain a certain positive pressure between all the units, and the torque of the power output member can be stably transmitted to the mounting unit <NUM> via the first engaging portion <NUM> and the second engaging portion 334a.

Those skilled in the art may set a target rotation angle of the display terminal <NUM> as needed. Specifically, when the target rotation angle is <NUM> degrees, the drive motor <NUM> may drive the display terminal <NUM> to rotate <NUM> degrees and lock the display terminal <NUM> after in place, which may be additionally provided with a locking mechanism, or the locking function may be integrated on the drive unit <NUM>. For example, an electric mounting shaft is provided with a transmission mechanism with a self-locking function, which can implement the automatic rotation of the display terminal <NUM> and provide users with better audiovisual feeling and driving or taking experience.

In a specific embodiment shown in <FIG>, the drive unit <NUM> may be embedded in the base <NUM>, and the mounting shaft includes a mounting shaft <NUM>, the mounting shaft <NUM> successively passing through the base <NUM> and the drive unit <NUM> and being inserted into the mounting unit <NUM> to be snapped into the mounting unit <NUM>. In addition, the mounting shaft <NUM> is inserted into the mounting unit <NUM> after passing through the base <NUM> and the drive unit <NUM> in sequence, so that quick integration of the mounting unit <NUM> and the drive unit <NUM> on the base <NUM> can be implemented, which is more convenient for disassembly and assembly while significantly saving the time for mounting the product.

One end of the mounting shaft <NUM> has a plurality of snap-in protrusions <NUM> evenly distributed along the circumferential direction, and the base <NUM> and the power output member both have a plurality of slots b through which the plurality of snap-in protrusions <NUM> pass. The mounting unit <NUM> has a mounting hole a, an inner wall of the mounting hole a having a plurality of guide grooves <NUM> and a plurality of locking grooves <NUM> connected to end portions of the guide grooves <NUM>, a limiting protrusion <NUM> being disposed at a transition between the locking groove <NUM> and the guide groove <NUM>, and the snap-in protrusions <NUM> being clamped between the locking groove <NUM> and the limiting protrusion <NUM>.

The snap-in protrusions <NUM> protrudes outward from a cylindrical side wall of the mounting shaft <NUM>, each of the snap-in protrusions <NUM> being generally trapezoidal. The base <NUM> and the power output member also both have through holes for the cylindrical side wall of a snap-in shaft portion to pass, trapezoidal slots B for the snap-in protrusions <NUM> to pass being disposed in the through holes. The guide groove <NUM> guides the insertion of the snap-in protrusions <NUM>, and the limiting protrusion <NUM> limits the snap-in protrusions <NUM> in the circumferential direction when the snap-in protrusions <NUM> enters the locking groove <NUM>, so that the mounting shaft <NUM> can always be stably fixed with the mounting unit <NUM> when the mounting unit <NUM> rotates.

During mounting, the snap-in protrusions <NUM> of the mounting shaft <NUM> sequentially passes through the base <NUM> and the slot b of the power output member, and then the snap-in protrusions <NUM> enters the guide groove <NUM> and slides along the guide groove <NUM>. When the snap-in protrusions <NUM> rotates the mounting shaft <NUM> toward the direction of the locking groove <NUM> after moving in place along the axial direction, the snap-in protrusions <NUM> enters the locking groove <NUM> and slides along the locking groove <NUM> until moving to the end of the locking groove <NUM>. In this case, the limiting protrusion <NUM> and the locking groove <NUM> jointly limit the snap-in protrusions <NUM>. As a result, the base <NUM>, the mounting unit <NUM>, and the drive unit <NUM> are integrated through the mounting shaft <NUM> by using the simple and compact structure.

In specific embodiments shown in <FIG>, and <FIG>, the guide grooves <NUM> extend along an axial direction of the mounting hole a, and the locking grooves <NUM> extend along a circumferential direction of the mounting hole a, each of the locking grooves <NUM> being connected to the guiding grooves <NUM> in a one-to-one correspondence manner and forming an L shape. Accordingly, when the mounting shaft <NUM> is mounted, quick mounting can be implemented by inserting first and then twisting, and the structure of the locking groove <NUM> is convenient for processing and production.

In order to further enhance the tightness of the connection between the mounting shaft and the mounting unit <NUM>, the mounting shaft and the first engaging portion <NUM> may be integrally formed. Those skilled in the art may understand that a manner in which the mounting shaft <NUM> is connected to the mounting unit <NUM> is not limited to the foregoing manner, and the mounting shaft <NUM> may also be connected to the mounting unit <NUM> in other snap-in manners or other detachable mounting manners.

As shown in <FIG> and <FIG>, in order to further improve the anti-shake and anti-vibration performance of the display terminal <NUM>, an elastic buffer structure is disposed in the rotating mechanism <NUM>. Specifically, the rotating mechanism <NUM> further includes an elastic member <NUM>, one end of the mounting shaft <NUM> being connected to the mounting unit <NUM> and the other end thereof having a block <NUM>, and the elastic member <NUM> being sleeved on the mounting shaft <NUM> and abutting between the block <NUM> and an end surface of the base <NUM>.

By disposing the elastic member <NUM>, sufficient positive pressure between the first engaging portion <NUM> and the second engaging portion 334a and for the transmission mechanism of the drive unit <NUM> can be maintained, to reduce the chattering and whirling of the display terminal <NUM> during driving due to existence of backlash of the transmission mechanism in the drive unit <NUM>, and reduce the risk of damage to the transmission system caused by blurred image quality, chattering, and rattling during vibration and impact, thereby ensuring the anti-shake and anti-vibration performance of the transmission mechanism.

This can not only effectively reduce the impact on the display terminal <NUM> from road impact transmitted to the rotating mechanism <NUM> through the base <NUM>, but also can reduce transmission failure due to external impact such as excessive pushing and pulling as a result of unexpected operations by a customer being transmitted to the drive unit <NUM> through the display terminal <NUM>. The drive unit <NUM> is further protected, further improving reliability of the rotating mechanism <NUM>.

Certainly, this application is not limited thereto. The method in which the positive pressure is obtained is not limited to the foregoing connection manner. The mounting shaft <NUM> may also be implemented by limiting one end of a shaft shoulder, by riveting the other end, and by tightening the shaft with a retaining ring or a nut.

As shown in <FIG> and <FIG>, the base <NUM> has a mounting groove <NUM>, and the drive unit <NUM> is embedded in the mounting groove <NUM> with one end abutting against the bottom of the mounting groove <NUM>. The mounting groove <NUM> has an avoiding through hole <NUM> for the mounting shaft <NUM> to pass through, an end portion of a housing <NUM> has a positioning shaft portion <NUM> surrounding the avoiding through hole <NUM>, and the elastic member <NUM> abuts against the end surface of the base <NUM> through an end surface bearing <NUM> sleeved on the positioning shaft portion <NUM>. Specifically, the elastic member <NUM> may be a compression spring. At this time, the positioning shaft portion <NUM> can function as a spring seat to provide center positioning for the elastic member <NUM>. By adding an end surface bearing <NUM> between the spring and an end surface of the base <NUM>, not only axial bearing capacity of the rotating mechanism <NUM> can be improved, but also the friction torque loss between the spring and the contact end surface of the base <NUM> can be reduced.

It may be understood that the housing can provide support for pivoting of the power output member, that is to say, the housing further has a hollow shaft sleeve, the power output member is pivotally sleeved on the hollow sleeve, and the mounting shaft is pivotally sleeved in the hollow sleeve.

To facilitate the wiring arrangement of the display terminal <NUM>, the mounting shaft <NUM> is a hollow shaft, and the mounting shaft <NUM>, the drive unit <NUM>, and the mounting unit <NUM> jointly form a hollow structure. In this way, lines distributed outside of the rotating mechanism <NUM> may be concentrated in the hollow structure to make the line layout more beautiful and safer.

As shown in <FIG>, the mounting unit <NUM> has a limiting post <NUM>, and the base <NUM> has a limiting groove <NUM>, the limiting post <NUM> being slidably disposed in the limiting groove <NUM> and being adapted to be matched with two ends of the limiting groove <NUM> to limit a stroke of the mounting unit <NUM>. In this way, an in-place locking function can be implemented in combination with an electronic control component. When the display terminal <NUM> rotates <NUM> degrees, the limiting post <NUM> runs to the end of the limiting slot <NUM>, the drive motor <NUM> of the drive unit <NUM> is locked, and the current increases. A control system can detect a blocking signal, a gyroscope built in the display terminal <NUM> transmits the in-place signal, which is identified by the control system, and the drive motor <NUM> is powered off, causing transmission of the power system to be interrupted and the system being locked in place.

As shown in <FIG>, the drive unit <NUM> includes: a housing <NUM>, a drive motor <NUM>, and a speed reducer <NUM>, the drive motor <NUM> being disposed in the housing <NUM> and having an output shaft. The speed reducer <NUM> is at least a first-stage transmission mechanism and includes at least a worm spur gear transmission mechanism. The worm spur gear transmission mechanism includes a worm and a spur gear that are meshed with each other, the worm being directly or indirectly connected to the output shaft of the drive motor <NUM>, and the second engaging portion 334a being formed on the spur gear and extending out of the housing <NUM>.

The drive motor <NUM> is a rotary drive motor <NUM>, and the output shaft is a rotatable drive motor <NUM> capable of outputting torque. At least one of the speed reducer <NUM> and the drive motor <NUM> has a self-locking function. The speed reducer <NUM> can be a first-stage transmission mechanism, a second-stage transmission mechanism, and a third-stage transmission mechanism. A transmission mechanism includes at least a worm spur gear transmission mechanism. In the specific embodiment shown in the figure, when the speed reducer <NUM> is a second-stage transmission mechanism, the speed reducer <NUM> may be composed of a worm helical transmission mechanism and a worm spur gear transmission mechanism. The worm helical gear transmission mechanism includes a first-stage worm <NUM> and a first-stage helical gear <NUM> that are meshed with each other. The spur gear transmission mechanism includes a second-stage worm <NUM> and a second-stage spur gear <NUM> that are meshed with each other. The first-stage worm <NUM> is connected to the output shaft of the drive motor <NUM>, the second-stage worm <NUM> and the first-stage helical gear <NUM> are coaxially disposed and fixedly connected, and the second-stage spur gear <NUM> is formed into a power output member.

The display terminal <NUM> needs to rotate at a very slow speed of about <NUM>-<NUM> r/min, which requires the speed reducer <NUM> to have a relatively large transmission ratio, about <NUM>-<NUM>. The worm spur gear transmission mechanism has the following advantages: a compact structure, a small size, and a light weight; stable transmission, low noise, a high transmission ratio, and an obvious deceleration effect.

It may be understood that a manner in which the drive unit <NUM> in this application is driven is not limited to an electric driving mode, which may also be a pneumatic, hydraulic, or magnetic driving mode. The speed reducer <NUM> is not limited to the transmission mechanism mentioned in the foregoing specific embodiments, which may also include a planetary gear transmission mechanism, a bevel gear transmission mechanism, and the like.

In some embodiments, the housing <NUM> includes: a housing body <NUM> and a front housing cover <NUM>, the housing body <NUM> being configured to mount the drive motor <NUM> and the speed reducer <NUM>. The front housing cover <NUM> is connected to the housing body <NUM> at a front end of the housing body <NUM>, the spur gear being clamped between the housing body <NUM> and the front housing cover <NUM> in an axial direction, and the first engaging portion <NUM> extending forward out of the front housing cover <NUM>.

In this way, the front housing cover <NUM> can provide axial limiting for the spur gear. Moreover, when the speed reducer <NUM> needs to be overhauled, the engagement condition between the spur gear and the worm can be observed by removing the front housing cover <NUM>, or the spur gear can be directly replaced, which is convenient for disassembly and assembly.

As shown in <FIG>, a housing <NUM> of the drive unit <NUM> has a radial holding mechanism, and the second engaging portion 334a may be relatively rotatably disposed on the radial holding mechanism for limiting in a radial direction. The radial holding mechanism is used to limit the radial offset of at least a part of the rotating mechanism to prevent the rotating mechanism <NUM> from being radially biased during operation, so that the rotating mechanism <NUM> can maintain stable operation after long-term operation.

In the embodiment shown in <FIG>, the housing <NUM> of the drive unit <NUM> remains stationary after being mounted on the vehicle body. The housing <NUM> of the drive unit <NUM> has two hollow outer and inner rings. The radial holding mechanism includes the outer ring and the inner ring, the outer ring being sleeved on the inner ring, and the outer ring and the inner ring defining an annular cavity. At least a part of the second engaging portion 334a is disposed in the annular cavity, and at least a part of the second engaging portion 334a is sleeved on the inner ring. The inner ring is used to prevent the second engaging portion 334a from being biased radially inward, the outer ring is sleeved on at least a part of the second engaging portion 334a, and the outer ring is used to prevent the second engaging portion 334a from being biased radially outward.

The housing <NUM> of the drive unit <NUM> includes: a housing body <NUM>, a housing rear cover <NUM>, and the front housing cover <NUM>. The housing rear cover <NUM> is connected to the housing body <NUM>, the housing rear cover <NUM> has an annular second shaft portion 313a, the front housing cover <NUM> is connected to a front end of the housing body <NUM>, and the front housing cover <NUM> has an annular limiting ring 312a, the limiting ring 312a being sleeved out of the second shaft portion 313a to define an annular cavity, at least a part of the second engaging portion 334a being disposed in the annular cavity. At least a part of the second engaging portion 334a is sleeved on the second shaft portion 313a, the second shaft portion 313a is used to prevent the second engaging portion 334a from being biased radially inward, and the limiting ring 312a is sleeved on the at least part of the second engaging portion 334a, the limiting ring 312a being used to prevent the second engaging portion 334a from being biased radially outward.

Certainly, this application is not limited thereto. In the embodiment shown in <FIG>, an inner ring may also be formed on the mounting unit. Specifically, the housing <NUM> of the drive unit <NUM> includes: a housing body <NUM> and a front housing cover <NUM>, the front housing cover <NUM> being connected to a front end of the housing body <NUM> and having an annular limiting ring 312a, the mounting unit <NUM> having a mounting shaft <NUM> passing the housing, and the limiting ring 312a being sleeved on the mounting shaft <NUM> to define an annular cavity, at least a part of the second engaging portion 334a being disposed in the annular cavity. At least a part of the second engaging portion 334a is sleeved on the mounting shaft <NUM>, the mounting shaft <NUM> is used to prevent the second engaging portion 334a from being biased radially inward, and the limiting ring 312a is sleeved on the at least part of the second engaging portion 334a, the limiting ring 312a being used to prevent the second engaging portion 334a from being biased radially outward.

The power output member of the drive unit <NUM> includes an annular output gear. The output gear may be a second-stage driven spur gear in the foregoing embodiment, which is connected to the second engaging portion 334a and sleeved on the second shaft portion 313a. The second engaging portion 334a includes an engaging pad a1 to be locked with the second engaging portion 334a and a connecting sleeve a2 connected to one end of the engaging pad a1 away from the second engaging portion 334a, the connecting sleeve a2 being connected to the output gear, and the limiting ring 312a being sleeved on the connecting sleeve a2. In this way, radial inner and outer sides of the output gear are also respectively limited by the second shaft portion 313a and the limiting ring 312a, so that the output end of the drive unit <NUM> is not easily affected by external vibration during operation, thereby preventing rattling.

The radial holding mechanism may further include a radial limiting bearing not shown in the figure. A radial limiting bearing is disposed between the limiting ring and at least a part of the second engaging portion 334a. For example, the radial limiting bearing may be provided between the limiting ring and the connecting sleeve, so that the inner ring of the radial limiting bearing abuts against the connecting sleeve, and the outer ring of the radial limiting bearing abuts against the limiting ring, thereby ensuring that the radial limiting of the radial holding mechanism is more stable.

According to some embodiments of this application, the first engaging portion <NUM> forms a plurality of first locking teeth uniformly distributed along a circumferential direction on an end surface of the mounting unit <NUM>, and the second engaging portion 334a forms a plurality of second locking teeth uniformly distributed along a circumferential direction on an end surface of the power output member, the plurality of first locking teeth and the plurality of second locking teeth being distributed crosswise in the circumferential direction and mutually locked in the circumferential direction. Therefore, the first locking teeth and the second locking teeth cooperate to implement the transmission of torque by the power output member to the mounting unit <NUM>.

The first locking teeth <NUM> and the second locking teeth <NUM> are both trapezoidal, and two tooth sides of the first locking teeth <NUM> and the second locking teeth <NUM> gradually approach from the tooth root to the tooth top. In some embodiments, the two side surfaces of the first locking teeth <NUM> are inclined surfaces that are close to each other and symmetrically distributed, and the two side surfaces of the second locking teeth <NUM> are inclined surfaces that are close to each other and symmetrically distributed. In this way, the first locking teeth <NUM> and the second locking teeth <NUM> are both trapezoidal teeth, which reduces slippage of the first engaging portion <NUM> and the second engaging portion 334a caused by excessive torque and enhances the stability of power transmission, so that the display terminal <NUM> can be switched more stably through electric control.

As shown in <FIG>, in another embodiment of this application, the mounting unit <NUM> has a first groove into which the second engaging portion 334a is inserted. The first engaging portion <NUM> includes a plurality of key teeth disposed in the first groove, and the second engaging portion 334a includes a plurality of key grooves on the outer side wall of the power output member, the key grooves and the key teeth forming a spline connection. Therefore, when the drive unit <NUM> operates, the output torque is directly transmitted to the mounting unit <NUM> through the second engaging portion 334a and the first engaging portion <NUM>, so that the power output member drives the mounting unit <NUM> to rotate synchronously, thereby implementing automatic rotation of the display terminal screen.

In order to implement the axial limiting of the mounting unit <NUM> and eliminate the transmission clearance of the drive unit <NUM>, the following structure may be adopted. The mounting shaft <NUM> may be a rotating shaft integrated on the mounting unit <NUM>, and the mounting shaft <NUM> passes through the drive unit <NUM> and is axially limited by using a limiting retainer ring <NUM>, the limiting retainer ring <NUM> fixing the mounting shaft <NUM>, and a spring may be disposed between the limiting retainer ring <NUM> and the end portion of the base <NUM>.

It should be noted that the embodiments of the mounting unit <NUM>, the mounting shaft, and the drive unit <NUM> may be combined with each other without conflict to form more embodiments about the rotating mechanism <NUM>.

A structure of the drive unit <NUM> of the rotating mechanism <NUM> of the embodiment of this application is described below.

As shown in <FIG>, the drive unit <NUM> includes: a drive motor <NUM> and a speed reducer <NUM>, an output shaft of the drive motor <NUM> being connected to the speed reducer <NUM>, and the power output member of the speed reducer <NUM> having a second engaging portion 334a.

A worm spur gear reduction mechanism is adopted, which has a compact structure, a small volume, and a light weight with stability in transmission and low noise. The whole reduction mechanism has a flexible layout, convenient for routing, is more suitable for the requirements of compact space of the whole vehicle mechanism and weight limitation of the whole vehicle, and can also provide a user with better driving experience.

An included angle between an axis of a driving worm and an axis of a driven spur gear is an acute angle. An included angle between an axis L1 of a driving worm and an axis L2 of a driven spur gear is an acute angle α, thereby satisfying the inequality <NUM>° ≤ A ≤ <NUM>°. Further, <NUM>° ≤ α ≤ <NUM>°, for example, α = <NUM>°, and the magnitude of α is determined according to a helix angle of the driving worm.

In other words, the driving worm and the driven spur gear are not vertically arranged, so that the meshing state between the driving worm and the driven spur gear is good and the transmission efficiency is higher. The spur gear is convenient for machining, and the worm gear transmission in the related art is improved to worm spur gear transmission, there avoiding the problem of poor performance of worm gear machining.

In some embodiments, the speed reducer <NUM> is a first-stage transmission mechanism and includes: a first-stage worm <NUM> and a first-stage gear <NUM>, the first-stage worn <NUM> being fixedly connected to the output shaft of the drive motor <NUM>, and the first-stage worm <NUM> being meshed with the first-stage gear <NUM>, and an included angle between an axis of the first-stage worm <NUM> and an axis of the first-stage gear <NUM> being an acute angle. An included angle between the axis L1 of the first-stage worm <NUM> and the axis L2 of the first-stage gear <NUM> is α, thereby satisfying the inequality <NUM>° ≤ A ≤ <NUM>°. Further, <NUM>° ≤ α ≤ <NUM>°, for example, α = <NUM>°, and the magnitude of α is determined according to a helix angle of the first-stage worm <NUM>. In other words, the first-stage worm <NUM> and the first-stage gear <NUM> are not vertically arranged, so that the meshing state between the first-stage worm <NUM> and the first-stage gear <NUM> is good and the transmission efficiency is higher. The spur gear is convenient for machining, and the worm gear transmission in the related art is improved to worm spur gear transmission, there avoiding the problem of poor performance of worm gear machining.

In some other embodiments, as shown in the figure, the second-stage transmission mechanism includes: a first-stage worm <NUM>, a first-stage gear <NUM>, a second-stage worm <NUM>, and a second-stage spur gear <NUM>.

The output shaft of the drive motor <NUM> is fixedly connected to the first-stage worm <NUM>, and the first-stage worm <NUM> may be integrated outside the output shaft of the drive motor <NUM>.

The first-stage worm <NUM> is meshed with the first-stage gear <NUM>, an included angle between the axis of the first-stage worm <NUM> and the axis of the first-stage gear <NUM> is an acute angle, and an included angle between the axis L1 of the first-stage worm <NUM> and the axis L2 of the first-stage gear <NUM> is α, thereby satisfying the inequality <NUM>° ≤ A ≤ <NUM>°. Further, <NUM>° ≤ α ≤ <NUM>°, for example, α = <NUM>°, and the magnitude of α is determined according to a helix angle of the first-stage worm <NUM>. In other words, the first-stage worm <NUM> and the first-stage gear <NUM> are not vertically arranged, so that the meshing state between the first-stage worm <NUM> and the first-stage gear <NUM> is good and the transmission efficiency is higher. The spur gear is convenient for machining, and the worm gear transmission in the related art is improved to worm spur gear transmission, there avoiding the problem of poor performance of worm gear machining.

The second-stage worm <NUM> and the first-stage gear <NUM> are coaxially disposed, and disposed at intervals in an axial direction. The second-stage worm <NUM> and the first-stage gear <NUM> may be integrally machined, or the first-stage gear <NUM> may be connected to the second-stage worm <NUM> through splines.

The second-stage spur gear <NUM> is meshed with the second-stage worm <NUM>. An included angle between the axis of the second-stage worm <NUM> and the axis of the second-stage spur gear <NUM> is an acute angle, and an included angle between an axis L2 of the second-stage worm <NUM> and an axis L3 of the second-stage spur gear <NUM> is β, thereby satisfying the inequality <NUM>° ≤ β ≤ <NUM>°. Further, <NUM>° ≤ β ≤ <NUM>°, for example, β = <NUM>°, and the magnitude of β is determined according to a helix angle of the second-stage worm <NUM>. In other words, the second-stage worm <NUM> and the second-stage spur gear <NUM> are not vertically arranged, so that the meshing state between the second-stage worm <NUM> and the second-stage spur gear <NUM> is good and the transmission efficiency is higher. The spur gear is convenient for machining, and the worm gear transmission in the related art is improved to worm spur gear transmission, there avoiding the problem of poor performance of worm gear machining.

The axis of the first-stage worm <NUM> and the axis of the second-stage spur gear <NUM> are parallel to each other. The axis of the output shaft of the drive motor <NUM> is parallel to and spaced apart from the axis of the second-stage spur gear <NUM>. Therefore, the arrangement direction of the drive motor <NUM> is parallel to the output direction of the drive unit <NUM>, which is convenient for assembly design.

The first-stage gear <NUM> transmits the high-speed rotation of the first-stage worm <NUM> to the second-stage worm <NUM>. To reduce the vibration during transmission, the first-stage gear <NUM> may be a plastic member, while the first-stage worm <NUM>, the second-stage worm <NUM>, and the second-stage spur gear <NUM> are metal members.

The second-stage spur gear <NUM> is connected to the first engaging portion <NUM>, to implement power output. For example, the second-stage spur gear <NUM> and the first engaging portion <NUM> are integrated. According to function requirements of the second-stage spur gear <NUM> and the first engaging portion <NUM>, the two may be made of different materials. The second-stage spur gear <NUM> is made of a wear-resistant material, and the first engaging portion <NUM> is made of a self-lubricating material.

In this application, the movement adopts planetary gear train or a second-stage worm and a helical gear transmission system, so that the rotating mechanism <NUM> has the following advantages: (<NUM>) a compact structure, a small size, and a light weight; (<NUM>) stable transmission and low noise; (<NUM>) flexible layout, convenient for wiring. The mechanism is more suitable for the requirements of compact space of the whole vehicle mechanism and weight limitation of the whole vehicle, and can also provide a user with better driving experience. In addition, the unique in-place locking system in this application can effectively isolate the transmission system inside the movement from external impact, not only avoiding the chattering and whirling of the display screen caused by the internal backlash of the transmission system, and the like, but also improving system stability and anti-shake and anti-vibration performance, so that damage to the transmission system is prevented from external impact, and system reliability and life can be improved.

A rotating mechanism <NUM> of a display screen according to a specific embodiment of this application is described below with reference to <FIG>. The display screen may be a touch screen capable of performing man-machine interaction.

As shown in <FIG>, the connecting bracket <NUM> behind the display screen may be fixedly connected to the rotating disk (that is, the mounting unit <NUM> in the embodiment above) through a buckle and two screws. The rotating disk, the movement (the drive unit <NUM>), the base <NUM>, the spring (that is, the elastic member <NUM>), and the end surface bearing <NUM> are sequentially connected in series through the mounting shaft <NUM>, and are fixedly connected to the buckle of the rotating disk and the shoulder of the mounting shaft <NUM> to limit an axial length of the system, so that a certain positive pressure is maintained between the components connected in series to implement the system locking. Herein, in addition to the solution of this specification, the method of obtaining the positive pressure by implementing the axial limiting between the components may also be the method of limiting one end of a shaft shoulder, riveting the other end, and tightening the shaft with a retaining ring or a nut. The rotating disk and the movement are connected and transmit torque through transverse teeth. The movement and the base <NUM> are limited by using a shaft shoulder and a rib, and compressed and fixed by the positive pressure between the two, or may be fixedly connected by using other fixing methods. By adding an end surface bearing <NUM> between the spring and an end surface of the base <NUM>, axial bearing capacity of the system can be improved, and the friction torque loss between the spring and the contact end surface of the base <NUM> can be reduced during operation. A rear portion of the rotating disk is provided with a limiting post <NUM>, and a corresponding position of the end surface of the base <NUM> is designed with a <NUM>° avoidance track (that is, the limiting slot <NUM>), the two cooperating to achieve <NUM>° in-place locking.

For the rotating mechanism <NUM> of the display screen of this application, the system can implement the following functions: (<NUM>) automatic switching between horizontal and vertical display screens, (<NUM>) automatic positioning and locking after rotating in place, (<NUM>) system anti-shake and anti-vibration, (<NUM>) system overload protection and safety anti-pinch, and (<NUM>) matching and compatibility between multi-size terminals.

This application is mainly used for the rotating mechanism of the display screen, and is also applicable to other electronic products with rotation requirements.

As shown in <FIG>, the vehicle <NUM> according to an embodiment of a second aspect of this application includes: a display terminal <NUM> and a mounting assembly of the foregoing embodiment, the fixed bracket <NUM> being mounted on a body of the vehicle <NUM>, and the display terminal <NUM> being mounted to the mounting unit <NUM> of the rotating mechanism <NUM>. Therefore, the vehicle <NUM> adopts the rotating mechanism <NUM> for adjusting the display terminal <NUM> with anti-shake, anti-vibration, anti-pinch, and performance, which can not only realize automatic switching between horizontal and vertical screens, but also provide users with a better operating experience and audiovisual enjoyment. In addition, the automatic rotation is equipped with stable and reliable in-place locking and anti-backlash systems, which can effectively avoid screen blurring or vibration damage caused by screen shaking caused by road impact during driving.

It should be noted that the foregoing display terminal <NUM> may be multimedia, navigation, or display screen disposed inside the vehicle <NUM>. The display terminal <NUM> is not required to be integrated on the vehicle <NUM> when the vehicle <NUM> leaves the factory, which may not be disposed on the center console of the vehicle <NUM> during delivery but may be applied and integrated on the vehicle <NUM>.

In the description of this application, it should be understood that orientation or position relationships indicated by the terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "on", "below", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "anticlockwise", "axial direction", "radial direction", and "circumferential direction" are based on orientation or position relationships shown in the accompanying drawings, and are used only for ease and brevity of illustration and description, rather than indicating or implying that the mentioned apparatus or component must have a particular orientation or must be constructed and operated in a particular orientation. Therefore, such terms should not be construed as limiting of this application.

In addition, terms "first" and "second" are only used to describe the objective and cannot be understood as indicating or implying relative importance or implying a quantity of the indicated technical features. Therefore, features defining "first" and "second" can explicitly or implicitly include at least one of the features. In description of this application, "multiple" means at least two, such as two and three unless it is specifically defined otherwise.

In this application, unless otherwise explicitly specified or defined, the terms such as "install", "connect", "connection", and "fix" should be understood in a broad sense. For example, the connection may be a fixed connection, a detachable connection, or an integral connection; or the connection may be a mechanical connection or an electrical connection or may communicate with each other; or the connection may be a direct connection, an indirect connection through an intermediary, or internal communication between two elements or mutual action relationship between two elements, unless otherwise specified explicitly. A person of ordinary skill in the art may understand the specific meanings of the foregoing terms in this application according to specific situations.

In this application, unless otherwise explicitly specified or defined, the first feature being located "above" or "below" the second feature may be the first feature being in a direct contact with the second feature, or the first feature being in an indirect contact with the second feature through an intermediary. In addition, the first feature being located "above" the second feature may be the first feature being located directly above or obliquely above the second feature, or may simply indicate that the first feature is higher in level than the second feature. The first feature being located "below" the second feature may be the first feature being located directly below or obliquely below the second feature, or may simply indicate that the first feature is lower in level than the second feature.

Claim 1:
A rotating mechanism (<NUM>) for a display terminal (<NUM>), comprising:
a mounting unit (<NUM>) configured to mount a display terminal (<NUM>);
a clutch unit comprising a first engaging portion (<NUM>) and a second engaging portion (334a), wherein the first engaging portion (<NUM>) is connected to the mounting unit (<NUM>);
a drive unit (<NUM>) having a power output member capable of outputting torque, wherein the power output member is detachably connected to the second engaging portion (334a) and is capable of transmitting torque, and the first engaging portion (<NUM>) and the second engaging portion (334a) are in power coupling connection; wherein the rotating mechanism further comprises
a base (<NUM>), the drive unit (<NUM>) is disposed between the base (<NUM>) and the mounting unit (<NUM>), and the mounting unit (<NUM>) is pivotally connected to at least one of the drive unit (<NUM>) and the base (<NUM>), wherein the mounting unit (<NUM>) comprises a rotating disk and a mounting shaft (<NUM>) connected to the rotating disk, the rotating disk is provided on the drive unit (<NUM>) and the base (<NUM>) through the mounting shaft (<NUM>); and the drive unit (<NUM>) is disposed in the base (<NUM>), and the mounting shaft (<NUM>) successively passes through the base (<NUM>) and the drive unit (<NUM>) to be connected to the rotating disk; characterised in that the rotating mechanism further comprises
an elastic member (<NUM>), wherein one end of the mounting shaft (<NUM>) is connected to the mounting unit (<NUM>) and the other end thereof has a block (<NUM>), and the elastic member (<NUM>) is sleeved on the mounting shaft (<NUM>) and abutting between the block (<NUM>) and an end surface of the base (<NUM>), wherein the base (<NUM>) has a mounting groove (<NUM>) for accommodating the drive unit (<NUM>), the mounting groove (<NUM>) has an avoiding through hole (<NUM>) for the mounting shaft (<NUM>) to pass through, an end portion of the base (<NUM>) has a positioning shaft portion (<NUM>) surrounding the avoiding through hole (<NUM>), and the elastic member (<NUM>) abuts against the end surface of the base (<NUM>) through an end surface bearing (<NUM>) sleeved on the positioning shaft portion (<NUM>).