CN110143169B

CN110143169B - Rotating mechanism for display terminal and vehicle

Info

Publication number: CN110143169B
Application number: CN201810142898.4A
Authority: CN
Inventors: 张晓茹; 崔超; 白胜
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2018-02-11
Filing date: 2018-02-11
Publication date: 2023-01-06
Anticipated expiration: 2038-02-11
Also published as: CN110143169A

Abstract

The invention discloses a rotating mechanism for a display terminal and a vehicle, wherein the rotating mechanism comprises: the display terminal comprises an installation unit, a driving unit and a rotating shaft, wherein the installation unit is used for installing a display terminal, the driving unit comprises a machine shell, a power output part and a clutch part, the power output part is arranged in the machine shell, the power output part can output torque, at least part of the clutch part extends into the power output part, and the clutch part and the power output part are opposite in the axial direction and are mutually locked; one end of the rotating shaft is connected with the mounting unit, and the other end of the rotating shaft extends into the driving unit and is in dynamic coupling connection with the clutch piece. The rotating mechanism provided by the embodiment of the invention has the advantages that the clutch is additionally arranged to bear the torque, so that the service life of the power output part is prolonged to a certain extent, and meanwhile, the clutch at least partially extends into the power output part, so that the axial length of the whole rotating mechanism can be shortened, and the static load-bearing performance of bending resistance and torsion resistance of the whole rotating mechanism is improved.

Description

Rotating mechanism for display terminal and vehicle

Technical Field

The invention relates to the technical field of vehicles, in particular to a rotating mechanism for a display terminal and a vehicle.

Background

With the increasing requirements of modern automobiles on entertainment and intellectualization and the increasing popularization of mobile equipment, the functions and forms of multimedia become more abundant, and multifunctional and large-size touch screens which can be interconnected with mobile phones and computers and can be connected with the internet become the mainstream trend of future development, but most of the fixing modes of the touch screens are directly and fixedly connected to an instrument desk in a single mode of a transverse screen or a vertical screen at present. The form can not realize equal-proportion and full-screen display when facing image resources such as pictures, videos and the like with different specifications, and can not give consideration to personal use habits of different users.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, the invention provides a rotating mechanism for a display terminal, which can realize manual and automatic rotation of the display terminal, and further can realize arbitrary angle rotation or preset angle rotation of the display terminal on a plane where a display screen is located.

The invention also provides a vehicle with the rotating mechanism.

The rotating mechanism for a display terminal according to an embodiment of the present invention includes: the driving unit comprises a machine shell, a power output piece and a clutch piece, wherein the power output piece and the clutch piece are arranged in the machine shell, the power output piece can output torque, at least part of the clutch piece extends into the power output piece, and the clutch piece and the power output piece are opposite in the axial direction and are mutually locked; one end of the rotating shaft is connected with the mounting unit, and the other end of the rotating shaft extends into the driving unit and is in dynamic coupling connection with the clutch piece.

The rotating mechanism provided by the embodiment of the invention has the advantages that the clutch is additionally arranged to bear the torque, so that the service life of the power output part is prolonged to a certain extent, and meanwhile, the clutch at least partially extends into the power output part, so that the axial length of the whole rotating mechanism can be shortened, and the static load-bearing performance of bending resistance and torsion resistance of the whole rotating mechanism is improved.

In some embodiments, the mounting unit is configured to be manually rotatable to rotationally shift the clutch member with respect to the power take-off member between a plurality of engagement positions via the rotational shaft.

In some embodiments, the pto has a mounting hole for the rotary shaft to pass through, the mounting hole having a first engagement portion formed therein, and the clutch has a second engagement portion extending into the mounting hole to be lockingly engaged with the first engagement portion.

In some embodiments, the clutch extends into the mounting hole from one end of the power output, and the rotating shaft passes through the mounting hole and is inserted into the clutch from the other end of the power output.

In some embodiments, the clutch is arranged on the power output part, and the clutch is pushed against the power output part by the elastic part at one end of the power output part.

In some embodiments, the resilient member extends at least partially into the pto member,

in some embodiments, the resilient member is a compression spring that is fitted between an outer wall of the clutch member and the pto member.

In some embodiments, the clutch member further includes a positioning sleeve to one end of which the second engagement portion is connected, the elastic member being externally fitted over the positioning sleeve and axially sandwiched between the second engagement portion and the casing, and the power output member being internally fitted over the positioning sleeve.

In some embodiments, the power output member further comprises a first end face bearing and a second end face bearing, the first end face bearing being located between the power output member and the casing, the second end face bearing being located between the resilient member and the casing.

In some embodiments, the housing comprises a front shell and a rear shell, the resilient member is supported against one end of the front shell by a first end face bearing, and the power take-off member is supported against one end of the rear shell by a second end face bearing.

In some embodiments, one of the first and second engagement portions comprises a plurality of locking slots and the other of the first and second engagement portions comprises at least one locking tooth, each locking tooth being adapted to engage at least two of the locking slots to adapt the second engagement portion to engage the first engagement portion in at least two of the engagement positions. In some embodiments, the locking groove and the locking tooth each have an arcuate cross-section.

In some embodiments, the first engagement portion and the second engagement portion are each circular, and the locking groove and the locking tooth are each sector-shaped.

In some embodiments, the mounting unit has a limiting post, the housing has a plurality of limiting retaining walls, and the limiting post is adapted to cooperate with the limiting retaining walls to limit the stroke of the mounting unit.

In some embodiments, the driving unit further comprises: the driving motor is arranged in the shell and is provided with an output shaft; the speed reducer is at least one-stage transmission mechanism and at least comprises a worm straight-tooth transmission mechanism, the worm straight-tooth transmission mechanism comprises a worm and a straight-tooth gear which are meshed with each other, the worm is directly or indirectly connected with an output shaft of the driving motor, and the straight-tooth gear is formed into the power output part.

A vehicle according to an embodiment of the second aspect of the invention includes: the display terminal and rotary mechanism, rotary mechanism installs in the automobile body of vehicle, the display terminal install in rotary mechanism the installation element.

Drawings

Fig. 1 is a schematic perspective exploded view of an adjusting mechanism, a display screen and a fixing bracket for a display terminal according to an embodiment of the present invention.

Fig. 2 is a schematic cross-sectional view of fig. 1.

Fig. 3 is a schematic perspective exploded view of fig. 1.

Fig. 4 is a partial schematic view of a drive unit according to an embodiment of the invention.

Fig. 5 is a partial schematic view of a second joint according to an embodiment of the invention.

Reference numerals:

a rotating mechanism 100, a fixing bracket 200, a display terminal, a connecting bracket 400,

the mounting unit 10 is mounted on the frame,

clutch member 20, second engagement portion 21, positioning sleeve 22,

the driving unit 30, the machine shell 31, the front shell 311, the rear shell 312, the limit retaining wall 313, the driving motor 32, the speed reducer 33, the primary worm 331, the primary gear 332, the secondary worm 333, the secondary spur gear 334, the mounting hole 334a, the first joint 334b, the first end face bearing 34, the second end face bearing 35, the first rolling bearing 36, the second rolling bearing 37, the current limiting circuit board 38, the locking groove m, the locking tooth n,

the elastic member (40) is formed in a shape of a ring,

rotating shaft 50, end cap 60.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are illustrative and intended to explain the present invention and should not be construed as limiting the present invention.

The rotation mechanism 100 for a display terminal according to an embodiment of the present invention is described in detail below with reference to fig. 1 to 4.

As shown in fig. 1 and 3, the rotation mechanism 100 for a display terminal according to an embodiment of the present invention includes: mounting unit 10, drive unit 30, and rotary shaft 50.

Installation element 10 is used for installing display terminal, wherein installation element 10 can through set up connecting bracket 400 on display terminal with display terminal fixed connection, connecting bracket 400 can be integrated at display terminal's the back, also can detachably connect on display terminal, connecting bracket 400 can cooperate through the unified interface of shape with installation element 10, different models or not unidimensional display terminal all can be through unified interface connection on installation element 10 like this, installation element 10 has better commonality like this, application scope is wider.

The driving unit 30 comprises a casing 31, a power output part and a clutch part 20, wherein the power output part and the clutch part 20 are arranged in the casing 31, the power output part can output torque, the clutch part 20 at least partially extends into the power output part, and the clutch part 20 and the power output part are opposite in the axial direction and are mutually locked in a normal mode; one end of the rotating shaft 50 is connected to the mounting unit 10 and the other end thereof extends into the driving unit 30 and is coupled to the clutch 20 by power coupling.

It should be noted that "the clutch member 20 and the power output member are always locked to each other" means that when the display terminal is not acted by an external force or is acted by a small external force, the clutch member 20 and the power output member are always in a mutually locked state, and the rotation of the mounting unit 10 can be realized in two ways: a manual mode and an automatic mode, and the opening force of the manual mode can be realized through the structural design of the clutch member 20 and the power output member. The first engagement portion 334b and the second engagement portion 21 form a circumferential static friction force by the axial biasing force, and the circumferential static friction force forms an opening force for relative rotation of the first engagement portion 334b and the second engagement portion 21. When the torque applied to the first engaging portion 334b is greater than the opening force, the first engaging portion 334b and the second engaging portion relatively rotate to change the engaging position; when the torque received by the first engagement portion 334b is smaller than the opening force, the first engagement portion 334b and the second engagement portion 21 engage with each other to transmit the torque.

In addition, in the automatic mode, the power output part of the electric driving unit 30 outputs a torque and transmits the torque to the mounting unit 10 through the clutch part 20, so as to drive the display terminal connected to the mounting unit 10 to rotate, thereby realizing any angle rotation or preset angle rotation of the display terminal on the plane where the display screen is located by automatically controlling the rotation of the display terminal.

The applicant has found that if the pto is directly engaged with the rotary shaft 50 to transmit torque, the pto is subjected to large frictional force and positive pressure during operation, resulting in a low endurance life of the pto and the electric drive unit 30. Based on this, the rotating mechanism 100 according to the embodiment of the present invention additionally provides the clutch member 20 to bear the torque, so as to improve the service life of the power output member to a certain extent, and at the same time, the clutch member 20 at least partially extends into the power output member, so as to shorten the axial length of the entire rotating mechanism 100, and improve the static load-bearing performance of the entire rotating mechanism, such as bending resistance and torsion resistance.

As shown in fig. 3, the power output member has a mounting hole 334a for passing the rotary shaft 50 therethrough, a first engagement portion 334b is formed in the mounting hole 334a, and the clutch member 20 has a second engagement portion 21, the second engagement portion 21 projecting into the mounting hole 334a to be lock-fitted with the first engagement portion 334 b. Thereby, the first engagement portion 334b and the second engagement portion 21 realize torque transmission in the automatic rotation mode and rotation switching in the manual mode.

As shown in fig. 1, clutch member 20 extends from one end of the power output member into mounting hole 334a, and rotating shaft 50 extends from the other end of the power output member through mounting hole 334a and into clutch member 20. Therefore, positive pressure directly applied to the axial direction of the power output part is further reduced, and the static loading performance of bending resistance and torsion resistance of the integral rotating mechanism is further improved. Specifically, the clutch member 20 may be coupled to the power take-off member in a torque-transmitting connection such as a spline connection.

It can be understood that the clutch member 20 and the power output member of the rotating mechanism 100 according to the embodiment of the present invention may be always in the locked state, and at this time, the rotating mechanism 100 can realize the adjustment of the rotation angle of the display terminal through an electric control manner. Of course, the present invention is not limited thereto, and the clutch member 20 and the power output member may also constitute a clutch so that the display terminal can be rotated manually. In other words, the mounting unit 10 is configured to be manually rotatable to switch the clutch member 20 between the plurality of engagement positions rotatably relative to the power output member by the rotating shaft 50.

One of the first engaging portion 334b and the second engaging portion 21 includes a plurality of locking grooves m, and the other of the first engaging portion 334b and the second engaging portion 21 includes at least one locking tooth n, each of the locking teeth n being adapted to engage with at least two of the locking grooves m to allow the second engaging portion 21 and the first engaging portion 334b to be engaged at least in two of the engaging positions. For example, the end surface of the first engagement portion 334b is provided with a locking groove m, and the end surface of the second engagement portion 21 is provided with a locking tooth n; alternatively, the end surface of the second engagement portion 21 is provided with a lock groove m, and the end surface of the first engagement portion 334b is provided with a lock tooth n. Therefore, the clutch part is connected with the power output part in a groove tooth matching mode, the structure is simple and compact, and the processing and the production are convenient.

The following description will be further made only by taking an example in which the first engaging portion 334b includes the locking tooth m and the second engaging portion 21 includes the locking groove n.

The plurality of locking grooves m are uniformly spaced apart in the circumferential direction, the plurality of locking teeth n are uniformly spaced apart in the circumferential direction of the first engagement portion 334b, and the number of the locking grooves m and the number of the locking teeth n are the same, for example, four locking grooves m and four locking teeth n are provided. Under the condition of not considering machining errors, the included angle of the center lines of two adjacent locking grooves m is 90 degrees, in the initial state, a plurality of locking teeth n are meshed with the locking grooves m in a one-to-one correspondence mode, and when the first joint portion 334b rotates relative to the second joint portion 21 until a certain locking tooth n is meshed with another adjacent locking groove m, the rotation of the mobile terminal can be achieved.

Each locking tooth n is adapted to engage at least two locking grooves m to adapt the clutch member 20 and the power take-off member to engage in at least two engagement positions. For example, for a given locking tooth n, the locking tooth n can engage with two locking grooves m, and the angle between the two locking grooves m represents an angle of rotation of the clutch member 20 relative to the power output member.

As shown in fig. 5, or the locking grooves m include multiple groups, each group includes multiple locking grooves m, the locking grooves m of different groups are arranged in a staggered manner along the circumferential direction, when the first engaging portion 334b and the second engaging portion 21 are engaged at one of the engaging positions, the multiple locking teeth n are in one-to-one correspondence with the multiple locking grooves m of one of the groups, and when the first engaging portion 334b and the second engaging portion 21 are rotated to the other engaging position, the multiple locking teeth n are in one-to-one correspondence with the multiple locking grooves m of the other group, wherein the included angle between the axes of the two locking grooves m corresponding to each other in the two groups of locking grooves m is 90 °.

The number of the groups of the locking grooves m can be in one-to-one correspondence with the number of the positions of the display terminal, for example, when the display terminal comprises two positions of a horizontal screen and a vertical screen, the locking grooves m are 2 groups, for example, the locking grooves m comprise two groups, each group comprises three locking grooves m uniformly spaced in the circumferential direction, the locking grooves m are arranged in a staggered manner in the circumferential direction, for example, two sides of each locking groove m of the first group are respectively provided with one locking groove m of the second group, in each rotating process, each locking tooth n only needs to be embedded into the other locking groove m from one locking groove m, the locking tooth n cannot fall into a non-target locking groove m in the rotating process, an included angle between the locking groove m of the first group and one of the two locking grooves m of the second group is 90 degrees, an included angle between the locking groove m of the first group and the other locking groove m of the two locking grooves m of the second group is 30 degrees, the locking teeth n comprise three locking teeth n are uniformly spaced in the circumferential direction, and when the three locking teeth n are matched with the locking grooves m of different groups, the locking grooves of the locking grooves m, the locking grooves of the display terminal, the display terminal can be realized.

Locking groove m and locking tooth n all have the arc cross-section, and the root width of locking tooth n is greater than the width at the top of locking tooth n, and the width that locking groove m opened the end is greater than the width at locking groove m bottom, and the width of locking tooth n diminishes from the root to the top gradually.

When the arc-shaped side surface of the locking tooth n is pressed against the arc-shaped side wall of the locking groove m, torque can be transmitted between the clutch member 20 and the power output member (334 shown in figure 3); when the torque between the first engaging portion 334b and the second engaging portion 21 is greater than the pre-tightening force, the arc-shaped side surface of the locking tooth n slides relative to the arc-shaped side wall of the locking groove m and is disengaged from the arc-shaped side wall of the locking groove m, and the locking tooth n slides to the other locking groove m, so that the rotation of the display terminal is realized.

Owing to set up arc locking groove m and arc locking tooth n for clutch 20 can break away from through the relative slip of arcwall face when receiving big moment of torsion with power take off spare, is difficult for taking place the dead condition of card. After the locking groove m and the locking tooth n are separated, the arc-shaped locking tooth n slides along the end surface of the second engaging part 21, the friction force between the first engaging part 334b and the second engaging part 21 is small, the locking tooth is convenient to slide to the next engaging position quickly, and the locking tooth is not easy to block.

The locking groove m and the locking tooth n are formed in a fan-shaped ring shape concentric with the first engagement portion 334b or the second engagement portion 21. That is, the width of the locking groove m becomes gradually larger from the inside to the outside in the radial direction, and the width of the locking tooth n becomes gradually larger from the inside to the outside in the radial direction. It can be understood that when the first joint portion 334b and the second joint portion 21 transmit torque, the moment applied to the outer end is large, and by adopting the above structure, the force-bearing area of the outer end can be increased, the pressure applied to the outer end can be reduced, the strength of the outer end can be enhanced, and the outer end can be prevented from being broken.

The width of the open end of the locking slot m is smaller than that of the root of the locking tooth. In other words, the central angle of the scallops at the open ends of the locking grooves m is smaller than the central angle of the scallops at the roots of the locking teeth n, and the engagement position of the locking teeth n with the locking grooves m is related to the circumferential alignment position of the locking teeth n with the locking grooves m when the clutch member 20 is engaged with the power output member.

It can be understood that, under the ideal condition (without considering the processing error of the locking teeth and the locking grooves), the equal-height positions on the two sides of each locking tooth n are respectively pressed against the edges on the two sides of the open end of the locking groove m; due to machining errors, for example, the included angle between two adjacent locking teeth n is not equal to 90 degrees, the width of each locking tooth n is not equal, part of the locking teeth n and the corresponding locking grooves m may be pressed on one side, and at least one side of each locking tooth n presses the corresponding side of the corresponding locking groove m to enable the locking teeth n to be meshed with the locking grooves m.

That is to say, through the locking tooth n and the locking groove m that set up above-mentioned structural style, can guarantee that every locking tooth n all interlocks with the locking groove m that corresponds, and when there is certain error in the actual turned angle of display terminal and design angle, every locking tooth n all keeps the interlock with the locking groove m that corresponds, prevents to take place the condition of the virtual interlock of partial locking tooth n all with the locking groove m that corresponds, and partly interlock with locking groove m of another side locking tooth, locking tooth roll-off locking groove m when being convenient for manual operation.

The depth of the locking groove m is smaller than the height of the locking tooth n, so that the strength of the second engagement portion 21 is large.

As shown in fig. 5, each of the lock groove m and the lock tooth n has a sector annular cross section concentric with the first engagement portion 334b or the second engagement portion 21. That is, the width of the locking groove m becomes gradually larger from the inside to the outside in the radial direction, and the width of the locking tooth n becomes gradually larger from the inside to the outside in the radial direction. It can be understood that when the first engagement portion 334b and the second engagement portion 21 transmit torque, the torque applied to the outer end is large, and the strength of the outer end can be enhanced by the above structure, so that the outer end is prevented from breaking.

In order to ensure that the display terminal can rotate to a target angle, for example, the target angle can be 90 °, and the display terminal is switched between a horizontal screen and a vertical screen when the display terminal rotates, a paired positioning mechanism is provided between a part fixedly connected with a vehicle body and a rotating part, for example, a paired positioning mechanism is provided on the housing 31 of the driving unit 30 and the mounting unit 10, so that the display terminal rotates to the target angle, and two types of positioning mechanisms are described below.

In one embodiment, the positioning mechanism includes a position-limiting wall 313 and a position-limiting post (not shown in the figures), the housing 31 of the driving unit 30 is provided with two position-limiting walls 313, the two position-limiting walls 313 are spaced apart along the circumferential direction of the housing 31 of the driving unit 30, the angle between the two position-limiting walls 313 is a target angle of rotation, such as 90 °, the mounting unit 10 is provided with a position-limiting post, the position-limiting post extends toward the housing 31 of the driving unit 30, the position-limiting post is adapted to press against the position-limiting walls, in the initial position, the position-limiting post presses against one position-limiting wall 313, the display terminal is rotated, and when the mounting unit 10 rotates together with the position-limiting post until the position-limiting post presses against the other position-limiting wall 313, the display terminal is rotated to be in place, and the first engaging portion 334b and the second engaging portion 21 are engaged with each other in cooperation with the locking groove m and the locking tooth n of the first engaging portion 334b and the second engaging portion 21.

In an embodiment not shown in the drawings, the positioning mechanism includes a limiting groove and a positioning pin, the mounting unit 10 is provided with a circular arc-shaped limiting groove, the housing of the driving unit 30 is provided with the positioning pin, the positioning pin extends toward the limiting groove, the positioning pin can slide in the limiting groove, the radian of the limiting groove is equal to the target rotation angle of the display terminal, the positioning pin is suitable for abutting against the end of the limiting groove, when the positioning pin rotates from one end of the limiting groove to the other end, the display terminal is indicated to rotate in place, and the first engaging portion 334b and the second engaging portion 21 are matched with the locking groove and the locking tooth, so that the first engaging portion 334b and the second engaging portion 21 can be always engaged.

In order to eliminate the gap of the transmission mechanism, the rotating mechanism 100 further includes an elastic member 40, the elastic member 40 is disposed in the housing 31, and the elastic member 40 pushes the engaging element 20 against the power output element at the other end of the power output element. From this, can effectively completely cut off the inside transmission system of core and external impact, not only can avoid quivering the circle a little because the touch-sensitive screen that the inside backlash of transmission system etc. caused, improve system stability and anti-shake, anti vibration ability, also can avoid external impact to transmission system's damage simultaneously, improve system reliability and life-span.

In some embodiments, resilient member 40 extends at least partially into the pto, and in particular, resilient member 40 is a compression spring that is captured between an outer wall of clutch member 20 and the pto. This reduces the overall axial length of the mechanism, and also axially shortens the size of the housing 31. Therefore, the space can be saved, the adaptability is improved, and the bending resistance and torsion resistance load capacity of the whole mechanism is improved.

Further, the clutch member 20 includes a positioning sleeve 22, the second engagement portion 21 is connected to one end of the positioning sleeve 22, the elastic member 40 is externally fitted over the positioning sleeve 22 and is axially sandwiched between the second engagement portion 21 and the casing 31, and the power output member is internally fitted over the positioning sleeve 22. Therefore, the clutch part 20 can also play a role in positioning the elastic part 40, so that the spring can stretch more stably, and the gap eliminating effect is better.

In some embodiments, a first end face bearing 34 and a second end face bearing 35 are also included, the first end face bearing 34 being located between the power take-off and the housing 31, and the second end face bearing 35 being located between the resilient member 40 and the housing 31. In other words, the elastic member 40 is stopped at one end of the housing 31 by the first end face bearing 34, and the power output member is stopped at the other end of the housing 31 by the second end face bearing 35. Thus, the arrangement of the two end face bearings further enhances the smoothness of the rotation of the power output member, and reduces the friction loss to the casing 31.

Further, the housing 31 includes a front housing 311 and a rear housing 312, the elastic member 40 is stopped against one end of the front housing 311 by a first end bearing 34, and the power output member is stopped against one end of the rear housing 312 by a second end bearing 35. Thus, the casing 31 has a split structure, so that each part in the casing can be more conveniently disassembled and replaced.

In some embodiments, the driving unit 30 further includes: a drive motor 32, a reducer 33, the drive motor 32 being disposed in the housing 31, the drive motor 32 having an output shaft; the speed reducer 33 is at least a first-stage transmission mechanism and at least comprises a worm straight-tooth transmission mechanism, the worm straight-tooth transmission mechanism comprises a worm and a straight-tooth gear which are mutually meshed, the worm is directly or indirectly connected with an output shaft of the driving motor 32, and the straight-tooth gear forms a power output part.

As shown in fig. 4, the electric drive unit 30 includes: casing 31, driving motor 32, reduction gear 33, driving motor 32 sets up in casing 31, and driving motor 32 has the output shaft, and reduction gear 33 is one-level drive mechanism at least and includes worm straight-tooth drive mechanism at least, and worm straight-tooth drive mechanism includes worm and the spur gear of intermeshing, and the worm is connected with driving motor 32's output shaft directly or indirectly.

Specifically, the driving motor 32 is a rotary driving motor 32, the output shaft is a rotatable driving motor 32 shaft capable of outputting torque, at least one of the speed reducer 33 and the driving motor 32 has a self-locking function, so that when the driving motor 32 is powered off, the first engaging portion 334b and the second engaging portion 21 can be locked, and thus the transmission mechanism can be a primary transmission mechanism, a secondary transmission mechanism and a tertiary transmission mechanism, and the transmission mechanism at least comprises a worm straight-tooth transmission mechanism. In the specific embodiment shown in the figure, when the speed reducer 33 is a two-stage transmission mechanism, the speed reducer 33 may be composed of a worm helical gear transmission mechanism and a worm straight gear transmission mechanism, the worm helical gear transmission mechanism includes a first-stage worm 331 and a first-stage gear 332 which are engaged with each other, the worm straight gear transmission mechanism includes a second-stage worm 333 and a second-stage straight gear 334 which are engaged with each other, the first-stage worm 331 is connected with an output shaft of the driving motor 32, and the second-stage worm 333 is coaxially arranged with and fixedly connected to the first-stage gear 332.

The display terminal needs to rotate at a very slow speed (about 6-10 r/min), which requires the movement to have a large transmission ratio, about 1500-2000. The straight-tooth worm transmission mechanism has the advantages that: compact structure, small volume and light weight; and the transmission is stable, the noise is low, the transmission ratio is high, and the speed reduction effect is obvious.

It is understood that the electric driving unit 30 of the present invention is not limited to the electric driving method, and may be driven by pneumatic, hydraulic or magnetic driving method, and the speed reducer 33 is not limited to the transmission mechanism mentioned in the above specific embodiment, and may also include a planetary gear transmission mechanism, a bevel gear transmission mechanism, etc.

Further, the mounting unit 10, the electric drive unit 30, and the rotary shaft 50 are each formed in a hollow structure having a wiring hole extending in the axial direction. From this, the overall arrangement is more nimble, and the line of being convenient for is walked more, more is suitable for the requirement that whole car mechanism space is compact, whole car limit for weight moreover, also can give the better experience of driving and taking advantage of user simultaneously.

It should be noted that the adjustment angle of the display terminal is not limited to a degree (i.e. the position of the display terminal is not limited to the horizontal screen and the vertical screen), and those skilled in the art can set an appropriate target adjustment angle according to the needs.

The axial position of the rotating shaft 50 can be limited by a limiting end cover 60, and the rotating shaft 50 extends out of the casing 31 and is connected with the limiting end cover 60 at one end of the casing 31.

Further, the rotary shaft 50 may be pivotally connected to the housing 21 via a first rolling bearing 36 and a second rolling bearing 37, respectively.

It should be noted that the various embodiments described above with respect to the mounting unit 10, the clutch 20 and the electric drive unit 30 can be combined with one another without going counter to form more embodiments with respect to the rotation mechanism 100.

The structure of the electric drive unit 30 of the actuator of the embodiment of the present invention is described below.

As shown in fig. 4, the electric drive unit 30 includes: the driving motor 32 and the speed reducer 33, the output shaft of the driving motor 32 is connected with the speed reducer 33, and the power output member of the speed reducer 33 is provided with a second joint part 21.

The power source can be a driving motor 32, an oil pump, an air pump and the like, the speed reducer 33 can be a gear speed reducer and a belt transmission speed reducer, and the speed reducer 33 can also be a worm gear transmission mechanism and the like. The speed reducer 33 may be a one-stage speed reducing mechanism or a multi-stage speed reducing mechanism.

The electromotive driving unit 30 for driving the movement of the display terminal, comprising: the power source and the speed reducer 33, the speed reducer 33 includes the initiative worm and the driven spur gear, the initiative worm links to each other with the output shaft of power source, driven spur gear and initiative worm meshing.

The worm straight gear speed reducing mechanism is compact, small in size, light in weight, stable in transmission, low in noise, flexible in layout of the whole speed reducing mechanism, convenient to walk wires, more suitable for requirements of compact space of the whole vehicle mechanism and weight limitation of the whole vehicle, and meanwhile, better driving experience can be given to users.

Referring to fig. 4, the included angle between the axis of the driving worm and the axis of the driven spur gear is an acute angle. The included angle between the axis L1 of the driving worm and the axis of the driven straight gear L2 is an acute angle alpha, and the requirements are as follows: alpha is more than or equal to 82 degrees and less than or equal to 88 degrees. Further, 84 ° ≦ α ≦ 86 °, such as α =85 °, α is sized according to the lead angle of the drive worm.

That is to say, the driving worm and the driven spur gear are not arranged vertically, so that the good meshing state of the driving worm and the driven spur gear can be ensured, and the transmission efficiency is higher. The straight gear is convenient to process, and the worm and gear transmission in the related technology is improved into worm and straight gear transmission, so that the problem of poor worm gear processing performance is avoided.

In some embodiments, the speed reducer 33 is a one-stage transmission, and the speed reducer 33 includes: the worm 331 comprises a first-level worm 331 and a first-level straight gear, the first-level worm 331 is fixedly connected with an output shaft of a power source, the first-level worm 331 is meshed with the first-level straight gear, and an included angle between an axis L1 of the first-level worm 331 and an axis of a first-level straight gear L2 is an acute angle. The axis L1 of the first-level worm 331 and the axis L2 of the first-level spur gear form an included angle alpha, and the included angle satisfies the following conditions: alpha is more than or equal to 82 degrees and less than or equal to 88 degrees. Further, 84 ≦ α ≦ 86 °, such as α =85 °, α is sized according to the lead angle of the primary worm 331. That is to say, the first-stage worm 331 and the first-stage spur gear are not arranged vertically, so that the meshing state of the first-stage worm 331 and the first-stage spur gear is good, and the transmission efficiency is higher. The straight gear is convenient to process, and the worm and gear transmission in the related technology is improved into worm and straight gear transmission, so that the problem of poor worm gear processing performance is avoided.

In other embodiments, as shown in FIG. 4, the secondary transmission comprises: a first-stage worm 331, a first-stage spur gear, a second-stage worm 333, and a second-stage spur gear 334.

Wherein, the output shaft of power supply and one-level worm 331 fixed connection, one-level worm 331 can integrate outside the output shaft of power supply.

One-level worm 331 meshes with one-level spur gear, and the axis of one-level worm 331 is the acute angle with the contained angle of the axis of one-level spur gear, and the contained angle alpha of the axis L1 of one-level worm 331 and the axis L2 of one-level spur gear satisfies: 82 DEG & lt, alpha & lt, 88 DEG, further, 84 DEG & lt, alpha & lt, 86 DEG, such as alpha =85 DEG, the size of alpha is determined according to the helix angle of the primary worm 331. That is to say, the first-stage worm 331 and the first-stage spur gear are not arranged vertically, so that the meshing state of the first-stage worm 331 and the first-stage spur gear is good, and the transmission efficiency is higher. The straight gear is convenient to process, and the worm and gear transmission in the related technology is improved into worm and straight gear transmission, so that the problem of poor worm gear processing performance is avoided.

The second-stage worm 333 is coaxially arranged with the first-stage spur gear, the second-stage worm 333 is axially spaced from the first-stage spur gear, the second-stage worm 333 and the first-stage spur gear may be integrally machined, or the first-stage spur gear may be connected to the second-stage worm 333 via a spline.

The secondary spur gear 334 meshes with the secondary worm 333. The included angle between the axis L2 of the second-stage worm 333 and the axis L3 of the second-stage spur gear 334 is an acute angle, and the included angle β between the axis L2 of the second-stage worm 333 and the axis L3 of the second-stage spur gear 334 satisfies the following requirements: 82 DEG-beta-88 DEG, and further 84 DEG-beta-86 DEG, such as beta =85 DEG, the size of beta is determined according to the helix angle of the two-stage worm 333. That is to say, the secondary worm 333 and the secondary spur gear 334 are not arranged vertically, so that the meshing state of the secondary worm 333 and the secondary spur gear 334 is ensured to be good, and the transmission efficiency is higher. The straight gear is convenient to process, and the worm and gear transmission in the related technology is improved into worm and straight gear transmission, so that the problem of poor worm gear processing performance is avoided.

The axis L2 of the primary worm 331, the axis L2 of the secondary spur gear 334 and the axis of the clutch 20 are parallel. The axis of the output shaft of the power source is parallel to and spaced from the axis of the secondary spur gear 334. Thus, the arrangement direction of the power source can be parallel to the output direction of the electric drive unit 30, and the assembly design is facilitated.

When the power source does not work, the clutch function of the whole scheme can be realized by utilizing the self-locking function of the worm (the self-locking can be triggered when the helix angle of the worm is smaller than the friction angle), namely, when the power source is operated manually, the speed reducer 33 is self-locked, so that the first joint part 334b is fixed, and the first joint part 334b can rotate relatively.

The primary straight gear transmits the high-speed rotation of the primary worm 331 to the secondary worm 333, and in order to reduce the vibration in the transmission process, the primary straight gear can be a plastic part, and the primary worm 331, the secondary worm 333 and the secondary straight gear 334 are metal parts.

The second-stage spur gear 334 is connected to the first joint portion 334b to achieve power output, for example, the second-stage spur gear 334 and the first joint portion 334b are integrally formed, and may be made of different materials according to functional requirements of the second-stage spur gear 334 and the first joint portion 334b, the second-stage spur gear 334 is made of a wear-resistant material, and the first joint portion 334b is made of a self-lubricating material.

A rotating mechanism 100 for a display screen according to one embodiment of the present invention is described below with reference to fig. 1. The display screen can be a touch screen capable of human-computer interaction.

In the embodiment shown in fig. 1, the rotating disc is fixedly connected with the connecting bracket 400 (provided with the corresponding interface structure) through a bolt; the rotating disc (namely the mounting unit 10) is fixedly connected with the rotating shaft 50 through screws, and the rotating disc and the rotating shaft 50 can also be directly integrated; the shaft 50 and the clutch collar (i.e., clutch member 20) have corresponding splines and grooves for guiding during assembly and for transmitting torque during rotation.

The clutch lantern ring is cooperated with the low-speed gear, is correspondingly provided with trapezoidal teeth or concave-convex bags for coordination, forms a clutch structure when rotating relatively, the gear is limited and fixed, the clutch lantern ring moves towards the compression direction of the spring, and the trapezoidal teeth provide torque when rotating relatively and statically.

The position and connection relationship between the rotation shaft 50 and all the components are described. The core (i.e. the electric driving unit 30) is inserted to the end cap 60 and is connected with the end cap by a screw, the spring (i.e. the elastic element 40) provides a system pre-tightening force, one end of the spring is abutted against the rear shell 312, an end face bearing is arranged between the spring and the rear shell to reduce friction, and the other end of the spring is abutted against the clutch collar and can rotate along with the rotating shaft 50.

The inner structure of the movement is limited by the corresponding structure of the casing 31, and the movement cannot be leaped up in the axial direction. The shell 31 is provided with screw holes and fixed on the connecting and fixing bracket 200. Meanwhile, the automatic rotation is locked by the over-current protection when the rotation is in place; the manual rotation is controlled by the 90 ° rotation stroke by the convex-concave hull (the first engagement portion 334b, the second engagement portion 21). The rotating disk is provided with a limiting rib position, and the front shell 311 is provided with a limiting retaining wall, so that the function of positioning in 90 degrees is realized.

The operation of the rotating mechanism 100 according to the embodiment of the present invention and the operation principle of the key components are briefly described below.

1) Transfer route of the rotating system in automatic mode: the output torque of the driving motor 32 is reduced and increased by the movement, and is transmitted to the clutch lantern ring through the second-level worm 333 gear transmission mechanism, and the output torque of the driving motor 32 is smaller than the opening force in a manual mode, so that the clutch lantern ring, the driving motor 32 and the transmission system are relatively static and rotate simultaneously, and the rotating shaft 50, the rotating disc and the connecting bracket 400 are driven to rotate. The rotary disk is provided with a stroke retaining wall which can be contacted with a limit post on the movement shell to be limited when rotating for 90 degrees.

After the motor is limited by a limiting column on the movement, the driving motor 32 blocks the rotation, the current is increased, the control system detects a blocking signal and transmits an in-place signal by the connecting bracket 400 or a gyroscope arranged in the display device, the control system recognizes that the motor is in place and performs power-off processing on the driving motor 32, the transmission of a power system is interrupted, and the system is locked in place;

2) Transfer route of the rotating system in manual mode:

in the automatic mode, the clutch collar and the low-speed gear rotate together relatively and still, but in the manual mode, because a transmission mechanism in the movement has a self-locking function, the low-speed gear of the movement is locked and cannot be driven by torque provided manually, meanwhile, the clutch collar is also restrained by the low-speed gear and cannot rotate, but can retreat when the torque is increased to be higher than a threshold value and is separated from the gear, and the torque is provided by hands and is transmitted to the clutch collar through the rotating disc and the rotating shaft 50.

3) Locking in place and protection system:

the in-place locking function of the rotary mechanism system in an automatic mode is ensured by positive pressure provided by spring assembly compression deformation and applied to the low-speed gear and the clutch collar and then transmitted to the core shell; the enough big systematic positive pressure between each part contact surface can the effectual isolated road surface that is come from fixed bolster 200 and is transmitted to the system strikes the influence to the system to carry out effectual protection to transmission system, further improved the reliability of system.

One end of the rotating shaft 50 is fixedly connected with the rotating disc through a screw, and then the related components are tightly pressed through a spring in the movement, so that the design can effectively prevent the display screen from shaking and circling around slightly due to the existence of a tooth gap in the movement, avoid the visual retention phenomenon caused by the display screen, and simultaneously prevent the damage risk of a transmission system caused by the slight shaking and hitting of the vibration impact, thereby ensuring the anti-shaking and anti-vibration performance of the system.

And the manual mode realizes the effective locking of 90 degrees of rotation stroke through the design of a clutch component and a limit column of a front shell 311 of the movement. The clutch ring is provided with a plurality of trapezoidal teeth, the trapezoidal teeth are combined with the gear when the torque is smaller, the trapezoidal teeth are separated from the gear when the torque is larger by the introduction, the key parts of the manual mode are the driving motor 32, the transmission system and the clutch ring, the key parts of the manual mode are temporarily fastened into a whole, and the automatic mode is realized by the automatic power output by the machine core. The scheme has the outstanding characteristics that the automatic manual switching device has two manual and automatic working modes, a proper threshold value is set for the opening force of the manual mode, the opening force is required to be larger than the output torque of the movement and a certain margin is reserved, the manual and automatic switching can be realized, and the two modes can coexist structurally through the clutch collar and the low-speed gear clutch of the movement.

4) In order to improve the driving experience of customers, the touch screen of the system rotates at an extremely slow rotating speed (about 6-10 r/min), which requires a transmission system of the movement to have a large transmission ratio of about 1500-2000. The double-worm speed reduction system of the planetary gear train speed reducer 33 or the two-stage worm and helical gears can be selected according to the specific structural layout, and the whole rotating shaft is designed to be of a hollow structure, so that the design of a locking system is facilitated.

5) This rotation system is through embedded current-limiting circuit board, after detecting the electric current that surpasss the settlement threshold value, carries out outage processing to driving motor 32 to the safety of realization system prevents pressing from both sides and overload protection.

6) In-place and abnormal position control: the system starts the anti-pinch indication when the system is in place at 90 degrees or the touch screen meets external resistance, the anti-pinch indication is started by means of current rising and exceeds a design threshold value of a current limiting small plate, the system performs power-off processing on the driving motor 32 to realize the anti-pinch indication, after the driving motor 32 is powered off, the control system can judge whether the touch screen is in an abnormal position or not according to a signal transmitted by a built-in gyroscope of the touch screen, if the signal transmitted by the gyroscope shows that the touch screen is in a horizontal screen position or a vertical screen position, the power-off of the driving motor 32 is in the in-place power-off state, otherwise, the touch screen is in the abnormal position, the power-off of the driving motor 32 is judged to be abnormal and meets the resistance power-off state, a warning picture appears to remind a client of foreign matter examination, and after the resistance disappears, the anti-pinch indication is restarted according to the selection of the client. The abnormal position judgment comprises manual operation in an automatic running state, the actual abnormal position feedback processing can design software functions according to the definition of customer requirements, and the limit locking structure of the scheme can be fully adapted to different software function definitions (control on the abnormal position) on the physical level.

7) The parts of the whole mechanism are designed in a hollow mode, so that wiring harnesses are reasonable and attractive after the screen is shielded, and the wire outlet is provided with a large round angle and is also used for preventing wire cutting.

8) The system is a centering rotation system, namely the rotation center is always kept unchanged in the rotation process, so that the matching and compatibility among terminals with multiple sizes can be realized by adopting the connecting bracket 400 with a uniform interface. Thereby improving the universality of the product, saving the cost and facilitating the product control.

9) The touch screen of the system is suspended in the central control unit, so that the instrument table is tidier and more attractive.

This patent relates to a manual, the autogiration system of touch-sensitive screen, and this system can realize following function:

1) The touch screen is automatically switched between a horizontal screen state and a vertical screen state; 2) In order to enhance the experience of a user, a manual mode and an automatic mode are provided; 3) Automatic positioning and locking after rotation in place; 4) The system is anti-shake; 5) System overload protection and safety anti-pinch; 6) And the multi-size terminal is compatible in matching and has strong adaptability.

The movement can adopt a planetary gear train or a two-stage worm and helical gear transmission system, so that the system has the following advantages: 1) The mechanism is compact, small in volume and light in weight; 2) The transmission is stable, the noise is low, the transmission ratio is high, and the deceleration effect is obvious; 3) The layout is flexible, and the wiring is convenient. The requirements of compact mechanism space and weight limitation of the whole vehicle are met, and better driving experience can be provided for users; 4) The in-place locking system can effectively isolate a transmission system in the movement from external impact, so that the micro-vibration and convolution of the touch screen caused by tooth gaps in the transmission system and the like can be avoided, the stability, the anti-vibration and anti-vibration capabilities of the system are improved, meanwhile, the damage of external impact on the transmission system can be avoided, and the reliability and the service life of the system are improved; 5) The rotating mechanism for the touch screen is also suitable for other electronic products with rotating requirements; 6) The low-speed gear is subjected to axial stress provided by a spring in a system, and the end face bearing is increased to improve the loading capacity and reduce friction; 7) If the low-speed gear directly performs the clutch and torque transmission function with the rotating shaft 50, it is subjected to a large friction force and a large positive pressure during operation, resulting in a short durability. Therefore, the gear is disassembled, and a part is separated to bear the torque, so that the service life of the gear is prolonged to a certain extent; 8) The clutch collar and the gear are compressed tightly by the spring to prevent vibration, the clutch collar and the gear can be dug into a proper groove position, and the spring is embedded to reduce the overall axial length of the mechanism, and meanwhile, the shell 31 also axially shortens the size. Therefore, the space can be saved, the adaptability is improved, and the bending resistance and torsion resistance loading capacity of the mechanism is improved; 9) A control circuit of the driving motor 32 can be added, a layer of safety is added besides mechanical limiting, and more functions can be realized by matching with input signals of the touch screen.

A vehicle according to an embodiment of the second aspect of the invention includes: display terminal and mounting assembly of the above embodiment, the fixing bracket 200 is mounted to the body of the vehicle, and the display terminal is mounted to the mounting unit 10 of the rotating mechanism 100. Therefore, the vehicle adopts the rotating mechanism 100 with the display terminal adjusting functions of anti-shake, anti-vibration, anti-pinch and performance, so that the automatic switching between the horizontal screen and the vertical screen can be realized, the manual operation can be performed according to the needs of the user, and better operation experience and audio-visual enjoyment are provided for the user; meanwhile, the device is provided with a stable and reliable in-place locking system and a gap eliminating system respectively according to manual or automatic rotation, and can effectively avoid image blurring or vibration damage caused by screen shaking caused by road impact in the driving process.

The display terminal may be a multimedia, navigation, and display screen disposed inside the vehicle, and the display terminal is not limited to be integrated on the vehicle when the vehicle leaves a factory, and may also be a display terminal that is not disposed on a center console of the vehicle but can be applied to and integrated on the vehicle when the vehicle leaves the factory.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature "under," "beneath," and "under" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. A rotation mechanism (100) for a display terminal (300), comprising:

a mounting unit (10), the mounting unit (10) being used for mounting a display terminal (300);

the driving unit (30) comprises a shell (31), a power output part and a clutch part (20), wherein the power output part is arranged in the shell (31), the power output part can output torque, the clutch part (20) at least partially extends into the power output part, and the clutch part (20) and the power output part are opposite in the axial direction and are mutually locked;

and one end of the rotating shaft (50) is connected with the mounting unit (10), and the other end of the rotating shaft (50) extends into the driving unit 30 and is in power coupling connection with the clutch piece (20).

2. A rotation mechanism (100) for a display terminal (300) according to claim 1, characterized in that the mounting unit (10) is configured to be manually rotatable to switch the clutch member (20) rotatably with respect to the power take-off member between the plurality of engagement positions by the rotation shaft (50).

3. The rotary mechanism (100) for a display terminal (300) according to claim 1, wherein the power take-off has a mounting hole (334 a) for passing the rotary shaft (50), a first engaging portion (334 b) is formed in the mounting hole (334 a), and the clutch member (20) has a second engaging portion (21), and the second engaging portion (21) protrudes into the mounting hole (334 a) to be lock-engaged with the first engaging portion (334 b).

4. The rotary mechanism (100) for a display terminal (300) according to claim 3, wherein the clutch (20) is extended into the mounting hole (334 a) from one end of the power take-off, and the rotary shaft (50) is inserted into the clutch (20) through the mounting hole (334 a) from the other end of the power take-off.

5. A rotation mechanism (100) for a display terminal (300) according to claim 3, further comprising an elastic member (40), wherein the elastic member (40) is provided in the housing (31), and the elastic member (40) pushes the clutch member (20) against the power take-off member at one end thereof.

6. The rotary mechanism (100) for a display terminal (300) of claim 5, wherein the resilient member (40) extends at least partially into the pto.

7. The rotary mechanism (100) for a display terminal (300) according to claim 6, wherein the elastic member (40) is a compression spring fitted between an outer wall of the clutch member (20) and the power take-off.

8. A rotation mechanism (100) for a display terminal (300) according to claim 5, wherein the clutch member (20) further comprises a positioning sleeve (22), the second engagement portion (21) is connected to one end of the positioning sleeve (22), the elastic member (40) is externally sleeved on the positioning sleeve (22) and is axially sandwiched between the second engagement portion (21) and the housing (31), and the power take-off member is internally sleeved on the positioning sleeve (22).

9. A rotation mechanism (100) for a display terminal (300) according to claim 5, further comprising a first end face bearing (34) and a second end face bearing (35), the first end face bearing (34) being located between the power take-off and the housing (31), the second end face bearing (35) being located between the resilient member (40) and the housing (31).

10. A rotation mechanism (100) for a display terminal (300) according to claim 9, wherein the housing (31) comprises a front shell (311) and a rear shell (312), the resilient member (40) being stopped at one end of the front shell (311) by a first end face bearing (34), and the power take-off member being stopped at one end of the rear shell (312) by a second end face bearing (35).

11. A rotation mechanism (100) for a display terminal (300) according to claim 3, wherein one of the first engagement portion (334 b) and the second engagement portion (21) comprises a plurality of locking slots (m) and the other of the first engagement portion (334 b) and the second engagement portion (21) comprises at least one locking tooth (n), each locking tooth (n) being adapted to engage with at least two locking slots (m) to adapt the second engagement portion (21) to engage with the first engagement portion (334 b) in at least two engagement positions.

12. The rotation mechanism (100) for a display terminal (300) according to claim 11, wherein the locking groove (m) and the locking tooth (n) each have an arc-shaped cross section.

13. The rotating mechanism (100) for a display terminal (300) according to claim 12, wherein the first engaging portion (334 b) and the second engaging portion (21) are each circular ring-shaped, and the locking groove (m) and the locking tooth (n) are fan-shaped.

14. The rotating mechanism (100) for a display terminal (300) according to claim 1, wherein the mounting unit (10) has a limiting post, and the housing (31) has a plurality of limiting walls, and the limiting post is adapted to cooperate with the limiting walls to limit the stroke of the mounting unit (10).

15. The rotating mechanism (100) for a display terminal (300) according to any one of claims 1 to 14, wherein the driving unit (30) further comprises:

a drive motor (32), the drive motor (32) being disposed within the housing (31), the drive motor (32) having an output shaft;

reduction gear (33), reduction gear (33) are one-level drive mechanism at least and include worm straight-tooth drive mechanism at least, worm straight-tooth drive mechanism includes intermeshing's worm and spur gear, the worm direct or indirect with the output shaft of driving motor (32), the spur gear forms power take off spare.

16. A vehicle, characterized by comprising:

a display terminal (300); and

the rotary mechanism (100) according to any one of claims 1 to 15, the rotary mechanism (100) being mounted to a body of a vehicle, the display terminal (300) being mounted to the mounting unit (10) of the rotary mechanism (100).