CN220785641U - Rotary actuator of display terminal - Google Patents

Abstract

The utility model discloses a rotary actuator of a display terminal, which comprises a driving motor, a planetary gear transmission mechanism, a steering mechanism and a mounting unit, wherein the driving motor comprises a rotating shaft, the planetary gear transmission mechanism is arranged above the driving motor, the steering mechanism comprises a first steering gear and a second steering gear which are meshed with each other, the axial direction of the first steering gear is consistent with the axial direction of the rotating shaft, the axial direction of the second steering gear is consistent with the axial direction of the planetary gear transmission mechanism, the axial direction of the first steering gear is perpendicular to the axial direction of the second steering gear, the first steering gear is in transmission connection with the rotating shaft, the second steering gear is in transmission connection with the planetary gear transmission mechanism, and the mounting unit is arranged at one end, far away from the driving motor, of the planetary gear transmission mechanism and is in transmission connection with the planetary gear transmission mechanism and is used for mounting the display terminal and rotates under the driving of the planetary gear transmission mechanism. The utility model can reduce the transverse dimension and the axial dimension of the rotary actuator at the same time.

Description

Rotary actuator of display terminal

Technical Field

The utility model relates to the technical field of electric actuators of automobile products, in particular to a rotary actuator of a display terminal.

Background

A display terminal is generally provided on a car for displaying the state of the car, navigation information, communication information, etc., which provides a lot of convenience to a driver. Along with the intelligent development of new energy automobiles, the design of installing an electric rotary actuator in a cab to adjust the angle of a display terminal is becoming more and more common. The display terminal on the car can electric control angle not only promote technological sense, but also a lot of practical benefits, for example: rotating the horizontal and vertical screens to switch so that APP of the horizontal and vertical screens can be fully displayed; the left-right deflection angle is used for meeting the requirements of primary driving and secondary driving and simultaneously being convenient to use, and solves the problem of reflection and glaring of the display screen under special light conditions.

The driving mechanism of the conventional display terminal rotary actuator is mostly worm gear transmission, parallel gear transmission or a combination thereof, and the transmission mode occupies larger transverse space. The adoption of planetary gear transmission can reduce the transverse dimension of the display terminal rotary actuator, but the axial dimension of the display terminal rotary actuator is increased, and the display terminal rotary actuator is not applicable in the occasion of smaller axial space.

Disclosure of utility model

The utility model aims to provide a rotary actuator of a display terminal, which aims to reduce the transverse dimension of the rotary actuator of the display terminal and simultaneously reduce the axial dimension of the rotary actuator.

In order to achieve the above purpose, the rotary actuator of the display terminal provided by the utility model comprises a driving motor, a planetary gear transmission mechanism, a steering mechanism and a mounting unit, wherein the driving motor comprises a rotating shaft, the planetary gear transmission mechanism is mounted above the driving motor, the steering mechanism comprises a first steering gear and a second steering gear which are meshed with each other, the axial direction of the first steering gear is consistent with the axial direction of the rotating shaft, the axial direction of the second steering gear is consistent with the axial direction of the planetary gear transmission mechanism, the axial direction of the first steering gear is perpendicular to the axial direction of the second steering gear, the first steering gear is in transmission connection with the rotating shaft, and the second steering gear is in transmission connection with the planetary gear transmission mechanism; the installation unit is installed in the one end of planetary gear drive mechanism that keeps away from driving motor, and with planetary gear drive mechanism transmission connection, the installation unit is used for installing the display terminal, and rotates under planetary gear drive mechanism's drive.

Optionally, the gear teeth of the first steering gear are straight teeth, and the gear teeth of the second steering gear are crown teeth.

Optionally, the steering mechanism further comprises a steering seat, the steering seat comprises a first connecting plate and a second connecting plate which are vertically arranged, the first connecting plate is installed at the top of the driving motor, a first channel which extends along the up-down direction is formed on one side of the second connecting plate, which is away from the planetary gear transmission mechanism, a first groove is concavely formed on one side of the second connecting plate, which is towards the planetary gear transmission mechanism, and the first groove is communicated with the first channel; the first steering gear is arranged in the first channel and is in transmission connection with the rotating shaft, the second steering gear is embedded in the first groove and meshed with the first steering gear, the first steering gear rotates under the driving of the rotating shaft and further drives the second steering gear to rotate, and the second steering gear rotates and further drives the planetary gear transmission mechanism to rotate.

Optionally, the first channel and the rotating shaft are opposite to each other, the rotating shaft stretches into the first channel and penetrates through the central hole of the first steering gear to be fixedly connected with the first steering gear, and the first steering gear synchronously rotates along with the rotating shaft to drive the second steering gear to rotate.

Optionally, a second channel is formed on the first connecting plate, the second channel is located on one side of the first channel facing the planetary gear transmission mechanism and is communicated with the first channel, and the second channel is opposite to the rotating shaft; the steering mechanism further comprises a third steering gear, the third steering gear is arranged on the second channel, the rotating shaft stretches into the second channel and penetrates through the center hole of the third steering gear to be fixedly connected with the third steering gear, the first steering gear is rotatably arranged on the first channel and meshed with the third steering gear, the third steering gear synchronously rotates along with the rotating shaft to further drive the first steering gear to rotate, and the first steering gear further drives the second steering gear to rotate.

Optionally, the first steering gear includes a lower coupling gear and an upper coupling gear, the upper coupling gear is convexly arranged on the top surface of the lower coupling gear, the diameter of the upper coupling gear is smaller than that of the lower coupling gear, the third steering gear is meshed with the lower coupling gear, and the second steering gear is meshed with the upper coupling gear.

Optionally, the planetary gear transmission mechanism includes center pin, first order planetary gear set and second order planetary gear set, first order planetary gear set with the coaxial setting of second steering gear is connected in the transmission, the second order planetary gear set range upon range of set up in the orientation of first order planetary gear set one side of installation unit, and with first order planetary gear set transmission is connected, the center pin rotationally wears to locate the second steering gear the centre bore of first order planetary gear set and second order planetary gear set, first order planetary gear set with the second order planetary gear set is in the drive of second steering gear is rotated around the center pin.

Optionally, the bottom wall of the first groove is concavely provided with a second groove, the second groove is located above the first channel, the diameter of the second groove is smaller than that of the first groove, a gasket is embedded in the second groove, and one end, facing the second connecting plate, of the central shaft penetrates through the central hole of the gasket to be in contact with the bottom wall of the second groove.

Optionally, the planetary gear transmission mechanism further comprises an internal tooth shell, a cylindrical accommodating cavity is formed in the internal tooth shell, the first-stage planetary gear set and the second-stage planetary gear set are both arranged in the accommodating cavity, and transmission teeth are formed on the side wall of the accommodating cavity; the first-stage planetary gear set comprises a first-stage planetary gear carrier, a first-stage sun gear and a plurality of first-stage planetary gears, wherein the first-stage sun gear is convexly arranged on one side, facing the installation unit, of the second steering gear, the plurality of first-stage planetary gears encircle the first-stage sun gear and are meshed with the first-stage sun gear and the inner gear shell, the first-stage planetary gear carrier is arranged on one side, facing the installation unit, of the second steering gear, a first-stage planetary hole is formed in the first-stage planetary gear carrier, a first-stage planetary shaft is convexly arranged on one side, facing the first-stage planetary gear carrier, of the first-stage planetary gear carrier, and the first-stage planetary shaft is inserted into the first-stage planetary hole; the first-stage sun gear rotates along with the second steering gear, so that the first-stage planet gear is driven to rotate around the first-stage sun gear, and the first-stage planet shaft rotates along with the first-stage planet gear, so that the first-stage planet carrier is driven to rotate around the central shaft.

Optionally, the second-stage planetary gear set includes a second-stage planetary carrier, a second-stage sun gear and a plurality of second-stage planetary gears, the second-stage sun gear is convexly arranged at one side of the first-stage planetary carrier facing the installation unit, the plurality of second-stage planetary gears encircle the second-stage sun gear and are meshed with the second-stage sun gear and the inner gear shell, the second-stage planetary carrier is arranged at one side of the first-stage planetary carrier facing the installation unit, a second-stage planetary hole is formed in the second-stage planetary carrier, a second-stage planetary shaft is convexly arranged at one side of the second-stage planetary carrier facing the second-stage planetary carrier, and the second-stage planetary shaft is inserted into the second-stage planetary hole; the second-stage sun gear rotates along with the first-stage planet carrier, so that the second-stage planet gear is driven to rotate around the second-stage sun gear, and the second-stage planet shaft rotates along with the second-stage planet gear, so that the second-stage planet carrier is driven to rotate around the central shaft.

The traditional worm gear transmission and parallel gear transmission are transverse transmission and occupy larger transverse space, so that the transverse dimension of the rotary actuator is reduced by adopting a planetary gear transmission mode, the axial dimension of the rotary actuator is reduced by arranging a steering mechanism to realize turning of the planetary gear transmission mechanism, and the transverse dimension increased by turning of the planetary gear transmission mechanism is smaller than the transverse dimension of worm gear transmission or parallel gear transmission of the same specification, so that the synchronous reduction of the transverse dimension and the axial dimension of the rotary actuator is realized. The display terminal has compact layout of the rotary actuator, and can be suitable for a cab with a small space.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic view showing the outline structure of a first embodiment of a rotary actuator of a display terminal according to the present utility model;

FIG. 2 is a cross-sectional view of a rotary actuator of the display terminal of FIG. 1;

FIG. 3 is an exploded view of a rotary actuator of the display terminal of FIG. 1;

fig. 4 is a schematic structural view of a steering seat of a rotary actuator of the display terminal of fig. 1;

FIG. 5 is a schematic view of the structure of FIG. 4 from another perspective;

fig. 6 is a schematic view showing the external structure of a second embodiment of a rotary actuator of a display terminal according to the present utility model;

FIG. 7 is a cross-sectional view of a rotary actuator of the display terminal of FIG. 6;

FIG. 8 is an exploded view of a rotary actuator of the display terminal of FIG. 6;

Fig. 9 is a schematic structural view of a steering seat of a rotary actuator of the display terminal of fig. 6;

FIG. 10 is a schematic view of the structure of FIG. 9 from another perspective;

FIG. 11 is an exploded view of a planetary gear transmission of an embodiment of a rotary actuator of a display terminal according to the present utility model;

FIG. 12 is an exploded view of a damping mechanism of one embodiment of a rotary actuator of a display terminal according to the present utility model;

fig. 13 is an exploded view showing a driving motor of a rotary actuator of a terminal according to an embodiment of the present utility model.

Reference numerals illustrate:

Reference numerals	Name of the name	Reference numerals	Name of the name	Reference numerals	Name of the name
						100	Rotary actuator	23	Second stage planetary gear set	343	A first channel
1	Driving motor	231	Second-stage planet carrier	344	Second channel
						11	Rotating shaft	2311	Second-stage planetary hole	345	First groove
12	Motor body	232	Second-stage sun gear	346	Second groove
						13	Magnet	233	Second-stage planetary gear	347	Gasket ring
14	Encoder with a plurality of sensors	2331	Second-stage planetary shaft	348	First avoidance port
						141	Magnetic field angle sensor	24	Internal tooth shell	349	Second avoidance port
15	Support sleeve	3	Steering mechanism	351	First fixing plate
						2	Planetary gear transmission mechanism	31	First steering gear	352	First fixed shaft
21	Center shaft	311	Lower connecting gear	4	Mounting unit
						22	First stage planetary gear set	312	Upper connecting gear	5	Output damping mechanism
221	First-stage planet carrier	32	Second steering gear	51	Output shaft
						2211	First-stage planetary hole	33	Third steering gear	52	End cap
222	First-stage sun gear	34	Steering seat	53	First gasket
						223	First-stage planetary gear	341	First connecting plate	54	Second gasket
2231	First-stage planetary shaft	342	Second connecting plate	55	Elastic piece

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

The utility model provides a rotary actuator of a display terminal, which can reduce the transverse dimension and the axial dimension of the rotary actuator of the display terminal.

Referring to fig. 1 to 10, a rotary actuator 100 of a display terminal of the present utility model includes a driving motor 1, a planetary gear transmission mechanism 2, a steering mechanism 3 and a mounting unit 4, the driving motor 1 includes a rotation shaft 11, the planetary gear transmission mechanism 2 is mounted above the driving motor 1, the steering mechanism 3 includes a first steering gear 31 and a second steering gear 32 which are engaged with each other, an axial direction of the first steering gear 31 coincides with an axial direction of the rotation shaft 11, an axial direction of the second steering gear 32 coincides with an axial direction of the planetary gear transmission mechanism 2, and an axial direction of the first steering gear 31 is disposed perpendicularly to an axial direction of the second steering gear 32, the first steering gear 31 is in transmission connection with the rotation shaft 11, and the second steering gear 32 is in transmission connection with the planetary gear transmission mechanism 2; the installation unit 4 is installed in the one end of planetary gear drive mechanism 2 that keeps away from driving motor 1 to with planetary gear drive mechanism 2 transmission connection, installation unit 4 is used for installing the display terminal, and rotates under the drive of planetary gear drive mechanism 2.

The rotary actuator 100 of the display terminal comprises a driving motor 1 and a planetary gear transmission mechanism 2, wherein the planetary gear transmission mechanism 2 is arranged above the driving motor 1 and is in transmission connection with a rotating shaft 11 of the driving motor 1, the planetary gear transmission mechanism 2 comprises a plurality of stages of planetary gear sets, the plurality of stages of planetary gear sets are arranged in a stacked mode and are in transmission connection in sequence, and one end, far away from the driving motor 1, of the planetary gear transmission mechanism 2 is provided with a mounting unit 4 for mounting the display terminal. The rotation of the rotating shaft 11 for driving electricity drives the planetary gear transmission mechanism 2 to rotate, and the rotation of the planetary gear transmission mechanism 2 drives the mounting unit 4 to rotate, so that the display terminal is driven to rotate.

It will be appreciated that the conventional worm gear and parallel gear are transverse and occupy a relatively large transverse space, while the planetary gear is longitudinal, and that the rotary actuator 100 is of a compact longitudinal configuration when the planetary gear 2 is coaxially disposed about the axis of rotation 11 of the drive motor 1, thereby providing substantial savings in transverse space. However, this causes the axial dimension of the display terminal rotary actuator 100 to increase, and is no longer suitable for use in a cab having a small axial space. To cope with this, the rotary actuator 100 of the present utility model is further provided with a steering mechanism 3 to improve the rational utilization of space.

The steering mechanism 3 includes a first steering gear 31 and a second steering gear 32, wherein the axial direction of the first steering gear 31 coincides with the axial direction of the rotating shaft 11, the axial direction of the second steering gear 32 coincides with the axial direction of the planetary gear transmission mechanism 2, and the axial direction of the first steering gear 31 is disposed perpendicularly to the axial direction of the second steering gear 32. For example, the gear teeth of the first steering gear 31 are straight teeth, the gear teeth of the second steering gear 32 are crown teeth, the straight teeth of the first steering gear 31 are meshed with the crown teeth of the second steering gear 32, meanwhile, the first steering gear 31 is in transmission connection with the rotating shaft 11, the second steering gear 32 is in transmission connection with the planetary gear transmission mechanism 2, the rotating shaft 11 rotates to drive the first steering gear 31 to rotate, the first steering gear 31 rotates to drive the second steering gear 32 to rotate, the second steering gear 32 rotates to drive the planetary gear transmission mechanism 2 to rotate, and then the mounting unit 4 is driven to rotate, and finally the display terminal is driven to rotate.

In summary, the rotary actuator 100 of the display terminal of the present utility model adopts a planetary gear transmission manner to reduce the lateral dimension of the rotary actuator 100, and sets the steering mechanism 3 to realize the turning of the planetary gear transmission mechanism 2, so as to reduce the axial dimension of the rotary actuator 100, and the lateral dimension increased by the turning of the planetary gear transmission mechanism 2 is smaller than the lateral dimension of the worm gear transmission or the parallel gear transmission of the same specification, so as to realize the synchronous reduction of the lateral dimension and the axial dimension of the rotary actuator. The rotary actuator 100 of the display terminal of the present utility model has a compact layout, and is applicable to a cab having a small space.

The steering mechanism 3 further comprises a steering seat 34, the steering seat 34 comprises a first connecting plate 341 and a second connecting plate 342 which are vertically arranged, the first connecting plate 341 is arranged at the top of the driving motor 1, and the second connecting plate 342 is convexly arranged on one side, away from the driving motor 1, of the first connecting plate 341. One side of the second connecting plate 342, which is away from the planetary gear transmission mechanism 2, is formed with a first channel 343 extending in the up-down direction, the first channel 343 is penetrated down to the bottom of the first connecting plate 341, one side of the second connecting plate 342, which is towards the planetary gear transmission mechanism 2, is concavely provided with a first groove 345, and the bottom wall of the first groove 345 is provided with a first avoiding opening 348, so that the first groove 345 is communicated with the first channel 343. The first channel 343 is a circular channel, the first groove 345 is a circular groove, the axial direction of the first channel 343 is consistent with the axial direction of the rotating shaft 11, and the axial direction of the first groove 345 is consistent with the axial direction of the planetary gear transmission mechanism 2.

The first steering gear 31 is disposed in the first channel 343 and is in driving connection with the rotating shaft 11, and the second steering gear 32 is embedded in the first groove 345 and is meshed with the first steering gear 31. The first steering gear 31 is driven by the rotating shaft 11 to rotate, so as to drive the second steering gear 32 to rotate, and the second steering gear 32 rotates to drive the planetary gear transmission mechanism 2 to rotate.

Regarding the manner of the driving connection between the first steering gear 31 and the rotating shaft 11, in an embodiment of the present utility model, the first steering gear 31 is directly sleeved on the rotating shaft 11 and is fixedly connected with the rotating shaft 11. Specifically, referring to fig. 3 to 5, the first channel 343 is disposed opposite to the rotating shaft 11, and the rotating shaft 11 extends into the first channel 343 and is disposed through the central hole of the first steering gear 31, so as to be fixedly connected with the first steering gear 31, and the first steering gear 31 rotates synchronously with the rotating shaft 11, so as to drive the second steering gear 32 to rotate.

At this time, the first steering gear 31 is disposed opposite to the rotation shaft 11 of the drive motor 1, and the planetary gear transmission mechanism 2 turns right above the rotation shaft 11. In order to further reduce the lateral dimensions increased by the turning of the planetary gear 2, the turning position of the planetary gear 2 can be shifted towards the side facing away from the turning direction.

In another embodiment of the present utility model, referring to fig. 8 to 10, the first connecting plate 341 is provided with the second channel 344, the second channel 344 is located on a side of the first channel 343 facing the planetary gear mechanism 2 and is disposed in communication with the first channel 343, and the second channel 344 is disposed opposite to the rotating shaft 11. The steering mechanism 3 further includes a third steering gear 33, the third steering gear 33 is disposed in the second channel 344, and the rotating shaft 11 extends into the second channel 344 and passes through a central hole of the third steering gear 33 to be fixedly connected with the third steering gear 33. The first steering gear 31 is rotatably mounted on the first channel 343 and is meshed with the third steering gear 33, and the third steering gear 33 rotates synchronously with the rotating shaft 11, so as to drive the first steering gear 31 to rotate, and the first steering gear 31 drives the second steering gear 32 to rotate.

The difference between this embodiment and the previous embodiment is that the first channel 343 is offset toward the side facing away from the turning direction of the planetary gear transmission mechanism 2, and a second channel 344 is provided at the position where the first connecting plate 341 faces the rotating shaft 11, and a second avoiding opening 349 is provided at the side where the second channel 344 meets the first channel 343, so that the first channel 343 and the second channel 344 are communicated. The second channel 344 is provided with a third steering gear 33, and the rotating shaft 11 extends into the second channel 344 and passes through the central hole of the third steering gear 33 to be fixedly connected with the third steering gear 33. The first steering gear 31 is rotatably mounted in the first channel 343, specifically, the bottom of the first channel 343 is provided with a first fixing plate 351, the first fixing plate 351 is fixedly mounted at the top of the driving motor 1, a first fixing hole is formed in the first fixing plate 351, a first fixing shaft 352 is further arranged in the first channel 343, the bottom of the first fixing shaft 352 stretches into the first fixing hole to be fixedly connected with the first fixing plate 351, and the first steering gear 31 is sleeved on the first fixing shaft 352 and is rotatably connected with the first fixing shaft 352. The lower end of the first steering gear 31 is engaged with the third steering gear 33 through the second escape opening 349, and the upper end of the first steering gear 31 is engaged with the second steering gear 32 through the first escape opening 348. Thus, the third steering gear 33 rotates synchronously with the rotating shaft 11, the third steering gear 33 rotates to drive the first steering gear 31 to rotate, and the first steering gear 31 rotates to drive the second steering gear 32 to rotate.

The present embodiment further reduces the lateral dimension of the rotary actuator 100 by shifting the turning position of the planetary gear 2 toward the side facing away from the turning direction, thereby reducing the width of the planetary gear 2 protruding from the drive motor 1.

Further, referring to fig. 8, the first steering gear 31 includes a lower coupling gear 311 and an upper coupling gear 312, the upper coupling gear 312 is protruded on the top surface of the lower coupling gear 311, the diameter of the upper coupling gear 312 is smaller than that of the lower coupling gear 311, the third steering gear 33 is engaged with the lower coupling gear 311 through the second escape hole 349, and the second steering gear 32 is engaged with the upper coupling gear 312 through the first escape hole 348.

Referring to fig. 11, the planetary gear transmission mechanism 2 includes a central shaft 21, a first-stage planetary gear set 22 and a second-stage planetary gear set 23, the first-stage planetary gear set 22 is coaxially disposed with and in driving connection with a second steering gear 32, the second-stage planetary gear set 23 is disposed on one side of the first-stage planetary gear set 22 facing the mounting unit 4 in a stacked manner and in driving connection with the first-stage planetary gear set 22, central holes penetrating each other are formed at the centers of the second steering gear 32, the first-stage planetary gear set 22 and the second-stage planetary gear set 23, the central shaft 21 rotatably penetrates through the central holes of the second steering gear 32, the first-stage planetary gear set 22 and the second-stage planetary gear set 23, and the first-stage planetary gear set 22 and the second-stage planetary gear set 23 rotate around the central shaft 21 under the driving of the second steering gear 32.

The bottom wall of the first groove 345 is concavely provided with a second groove 346, the second groove 346 is located above the first channel 343, the diameter of the second groove 346 is smaller than that of the first groove 345, a gasket 347 is embedded in the second groove 346, one end, facing the second connecting plate 342, of the central shaft 21 is penetrated through a central hole of the gasket 347 to be in contact with the bottom wall of the second groove 346, and the gasket 347 is used for supporting and fixing the central shaft 21.

Referring to fig. 3 or 8, the planetary gear transmission mechanism 2 further includes an internal gear housing 24, a cylindrical accommodating chamber is formed in the internal gear housing 24, and the first-stage planetary gear set 22 and the second-stage planetary gear set 23 are both disposed in the accommodating chamber, and transmission teeth are formed on a side wall of the accommodating chamber.

Referring to fig. 11, the first-stage planetary gear set 22 includes a first-stage planetary carrier 221, a first-stage sun gear 222, and a plurality of first-stage planetary gears 223, the first-stage sun gear 222 is convexly disposed on a side of the second steering gear 32 facing the mounting unit 4, the plurality of first-stage planetary gears 223 surround the first-stage sun gear 222 and are engaged with the first-stage sun gear 222 and the inner gear case 24, the first-stage planetary carrier 221 is disposed on a side of the second steering gear 32 facing the mounting unit 4, first-stage planetary holes 2211 are opened in the first-stage planetary carrier 221, first-stage planetary shafts 2231 are convexly disposed on a side of the first-stage planetary gears 223 facing the first-stage planetary carrier 221, and the first-stage planetary shafts 2231 are inserted into the first-stage planetary holes 2211.

Thus, the first-stage sun gear 222 rotates with the second steering gear 32, and thus drives the first-stage planetary gears 223 to rotate around the first-stage sun gear 222, and the first-stage planetary shafts 2231 rotate together with the first-stage planetary gears 223, and thus drive the first-stage planetary carriers 221 to rotate around the central shaft 21.

The second-stage planetary gear set 23 includes a second-stage planetary carrier 231, a second-stage sun gear 232, and a plurality of second-stage planetary gears 233, the second-stage sun gear 232 is convexly disposed on one side of the first-stage planetary carrier 221 facing the mounting unit 4, the plurality of second-stage planetary gears 233 encircle the second-stage sun gear 232 and are meshed with the second-stage sun gear 232 and the inner gear case 24, the second-stage planetary carrier 231 is disposed on one side of the first-stage planetary carrier 221 facing the mounting unit 4, second-stage planetary holes 2311 are formed in the second-stage planetary carrier 231, second-stage planetary shafts 2331 are convexly disposed on one side of the second-stage planetary gears 233 facing the second-stage planetary carrier 231, and the second-stage planetary shafts 2331 are inserted into the second-stage planetary holes 2311.

Accordingly, the second-stage sun gear 232 rotates along with the first-stage planet carrier 221, so as to drive the second-stage planet gears 233 to rotate around the second-stage sun gear 232, and the second-stage planet shafts 2331 rotate along with the second-stage planet gears 233, so as to drive the second-stage planet carrier 231 to rotate around the central shaft 21.

In summary, the driving process of the driving motor 1 and the planetary gear transmission mechanism 2 in the rotary actuator 100 of the display terminal of the present utility model is as follows: the rotating shaft 11 directly or indirectly drives the first steering gear 31 to rotate, thereby driving the second steering gear 32 to rotate, thereby driving the first-stage sun gear 222 to rotate, thereby driving the first-stage planetary gears 223 and the first-stage planetary gear carrier 221 to rotate, thereby driving the second-stage sun gear 232 to rotate, thereby driving the second-stage planetary gears 233 and the second-stage planetary gear carrier 231 to rotate, thereby driving the mounting unit 4 to rotate.

In an embodiment of the present utility model, referring to fig. 12, the rotary actuator 100 of the display terminal further includes an output damping mechanism 5, the output damping mechanism 5 being provided between the highest-stage planetary gear set and the mounting unit 4 for transmitting rotation of the highest-stage planetary gear set to the mounting unit 4. Specifically, the output damping mechanism 5 includes an output shaft 51, the lower end of the output shaft 51 is fixedly connected with the highest-level planet carrier, the upper end of the output shaft 51 is fixedly connected with the mounting unit 4, and the output shaft 51 rotates together with the highest-level planet carrier, so as to drive the mounting unit 4 to rotate. The lower end of the output shaft 51 is fixedly connected with the highest-level planet carrier, and the upper end of the output shaft 51 is fixedly connected with the mounting unit 4, wherein the fixed connection mode includes, but is not limited to, screw fastening, spin riveting fastening, interference tight fit and welding. When the output shaft 51 is fastened to the mounting unit 4 or the highest-stage carrier by screw fastening, a washer 347 or a screw adhesive may be added to prevent loosening.

The output damping mechanism 5 further includes an end cover 52, a first spacer 53 and a second spacer 54, where the end cover 52 covers the top surface of the inner gear shell 24 and is fixedly connected with the inner gear shell 24. The end cover 52 and the inner gear case 24 may be integrally formed, or may be fastened by screws or rivets. The first gasket 53 is sleeved on the output shaft 51 and contacts with the bottom surface of the end cover 52, the second gasket 54 is sleeved on the output shaft 51 and contacts with the top surface of the end cover 52, the first gasket 53 and the second gasket 54 are in non-sliding connection with the output shaft 51, namely, the first gasket 53 and the second gasket 54 rotate together with the output shaft 51, and further rub against the end cover 52 to generate friction torque.

Wherein, the first gasket 53 and the second gasket 54 are oil-gathering gaskets, and a plurality of oil-gathering grooves are formed on one side or both sides of the first gasket 53 and the second gasket 54 to ensure the lubricity of the first gasket 53 and the second gasket 54. It should be noted that, although the friction torque generated by the first spacer 53 and the second spacer 54 may weaken a part of the driving torque amplified by the gear mechanism, the friction torque avoids the phenomenon that the display terminal jolts and shakes due to the assembly gap of the gear mechanism, so as to further improve the experience of the user.

Further, the output damping mechanism 5 further includes an elastic member 55, where the elastic member 55 is sandwiched between the mounting unit 4 and the second spacer 54, and the elastic member 55 may be a belleville spring, a wave spring, or a combination thereof, and one end of the elastic member 55 is connected to the mounting unit 4, and the other end is connected to the second spacer 54, and is in a compressed state, so as to apply pressure to the second spacer 54 to compress the second spacer 54 against the upper end surface of the end cover 52.

In the utility model, the driving motor 1 is a stepping motor, and the stepping motor can be controlled in an open loop or closed loop mode. When the utility model is applied to an application occasion needing no accurate angle feedback, such as switching a horizontal screen and a vertical screen of a central control screen, an open-loop stepping motor can be adopted, and when the utility model is applied to an application occasion needing accurate angle feedback, such as a left deflection angle and a right deflection angle of the central control screen, a closed-loop stepping motor is adopted, at this time, referring to fig. 13, the stepping motor comprises a motor body 12, a magnet 13 and an encoder 14, a containing cavity is formed in the motor body 12, an electromagnetic coil is arranged in the containing cavity, a central shaft 21 penetrates through a hollow channel of the electromagnetic coil and protrudes out of the containing cavity, the magnet 13 is sleeved on a rotating shaft 11 and is positioned on the bottom surface of the electromagnetic coil, the magnet 13 is fixedly connected with the rotating shaft 11, the encoder 14 is arranged on the bottom wall of the containing cavity, the encoder 14 comprises a magnetic field angle sensor 141, and the magnetic field angle sensor 141 is positioned below the magnet 13 and is coaxially arranged with the magnet 13 and is used for detecting the rotating angle of the magnet 13 so as to monitor the rotating speed of the stepping motor.

Optionally, the bottom of the stepper motor may be provided with a support sleeve 15, and the support sleeve 15 is inserted through the bottom wall of the stepper motor to connect with the encoder 14, so as to raise the encoder 14.

The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the description of the present utility model and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the utility model.

Claims (10)

1. A rotary actuator for a display terminal, comprising:

the driving motor comprises a rotating shaft;

The planetary gear transmission mechanism is arranged above the driving motor;

The steering mechanism comprises a first steering gear and a second steering gear which are meshed with each other, the axial direction of the first steering gear is consistent with the axial direction of the rotating shaft, the axial direction of the second steering gear is consistent with the axial direction of the planetary gear transmission mechanism, the axial direction of the first steering gear is perpendicular to the axial direction of the second steering gear, the first steering gear is in transmission connection with the rotating shaft, and the second steering gear is in transmission connection with the planetary gear transmission mechanism;

the installation unit is installed at one end, far away from the driving motor, of the planetary gear transmission mechanism, is in transmission connection with the planetary gear transmission mechanism, and is used for installing a display terminal and rotating under the drive of the planetary gear transmission mechanism.

2. The rotary actuator of a display terminal according to claim 1, wherein the gear teeth of the first steering gear are straight teeth and the gear teeth of the second steering gear are crown teeth.

3. The rotary actuator of a display terminal according to claim 1, wherein the steering mechanism further comprises a steering seat, the steering seat comprises a first connecting plate and a second connecting plate which are vertically arranged, the first connecting plate is mounted on the top of the driving motor, a first channel which is arranged in an extending manner along the up-down direction is formed on one side of the second connecting plate, which is away from the planetary gear transmission mechanism, a first groove is concavely arranged on one side of the second connecting plate, which is towards the planetary gear transmission mechanism, and the first groove is arranged in communication with the first channel;

The first steering gear is arranged in the first channel and is in transmission connection with the rotating shaft, the second steering gear is embedded in the first groove and meshed with the first steering gear, the first steering gear rotates under the driving of the rotating shaft and further drives the second steering gear to rotate, and the second steering gear rotates and further drives the planetary gear transmission mechanism to rotate.

4. The rotary actuator of the display terminal according to claim 3, wherein the first channel is disposed opposite to the rotating shaft, the rotating shaft extends into the first channel and penetrates through the central hole of the first steering gear to be fixedly connected with the first steering gear, and the first steering gear synchronously rotates along with the rotating shaft to further drive the second steering gear to rotate.

5. The rotary actuator of the display terminal according to claim 3, wherein a second channel is formed on the first connecting plate, the second channel is located on one side of the first channel facing the planetary gear transmission mechanism and is communicated with the first channel, and the second channel is opposite to the rotating shaft;

The steering mechanism further comprises a third steering gear, the third steering gear is arranged on the second channel, the rotating shaft stretches into the second channel and penetrates through the center hole of the third steering gear to be fixedly connected with the third steering gear, the first steering gear is rotatably arranged on the first channel and meshed with the third steering gear, the third steering gear synchronously rotates along with the rotating shaft to further drive the first steering gear to rotate, and the first steering gear further drives the second steering gear to rotate.

6. The rotary actuator of a display terminal according to claim 5, wherein the first steering gear includes a lower coupling gear and an upper coupling gear, the upper coupling gear is protruded on a top surface of the lower coupling gear, a diameter of the upper coupling gear is smaller than a diameter of the lower coupling gear, the third steering gear is engaged with the lower coupling gear, and the second steering gear is engaged with the upper coupling gear.

7. The rotary actuator of a display terminal according to claim 4 or 5, wherein the planetary gear transmission mechanism includes a central shaft, a first-stage planetary gear set and a second-stage planetary gear set, the first-stage planetary gear set is coaxially disposed with the second steering gear and is in driving connection, the second-stage planetary gear set is disposed on one side of the first-stage planetary gear set facing the mounting unit in a stacked manner and is in driving connection with the first-stage planetary gear set, and the central shaft rotatably penetrates through central holes of the second steering gear, the first-stage planetary gear set and the second-stage planetary gear set, and the first-stage planetary gear set and the second-stage planetary gear set rotate around the central shaft under the driving of the second steering gear.

8. The rotary actuator of the display terminal according to claim 7, wherein the bottom wall of the first groove is concavely provided with a second groove, the second groove is located above the first channel, the diameter of the second groove is smaller than that of the first groove, a gasket is embedded in the second groove, and one end of the central shaft, which faces the second connecting plate, is penetrated through the central hole of the gasket to be in contact with the bottom wall of the second groove.

9. The rotary actuator of the display terminal according to claim 7, wherein the planetary gear transmission mechanism further comprises an inner gear housing having a cylindrical receiving cavity formed therein, the first stage planetary gear set and the second stage planetary gear set being both disposed in the receiving cavity, a sidewall of the receiving cavity being formed with transmission teeth;

The first-stage planetary gear set comprises a first-stage planetary gear carrier, a first-stage sun gear and a plurality of first-stage planetary gears, wherein the first-stage sun gear is convexly arranged on one side, facing the installation unit, of the second steering gear, the plurality of first-stage planetary gears encircle the first-stage sun gear and are meshed with the first-stage sun gear and the inner gear shell, the first-stage planetary gear carrier is arranged on one side, facing the installation unit, of the second steering gear, a first-stage planetary hole is formed in the first-stage planetary gear carrier, a first-stage planetary shaft is convexly arranged on one side, facing the first-stage planetary gear carrier, of the first-stage planetary gear carrier, and the first-stage planetary shaft is inserted into the first-stage planetary hole;

The first-stage sun gear rotates along with the second steering gear, so that the first-stage planet gear is driven to rotate around the first-stage sun gear, and the first-stage planet shaft rotates along with the first-stage planet gear, so that the first-stage planet carrier is driven to rotate around the central shaft.

10. The rotary actuator of a display terminal according to claim 9, wherein the second-stage planetary gear set includes a second-stage planetary carrier, a second-stage sun gear, and a plurality of second-stage planetary gears, the second-stage sun gear is convexly disposed at a side of the first-stage planetary carrier facing the mounting unit, the plurality of second-stage planetary gears surround the second-stage sun gear and are meshed with the second-stage sun gear and the inner gear case, the second-stage planetary carrier is disposed at a side of the first-stage planetary carrier facing the mounting unit, a second-stage planetary hole is provided in the second-stage planetary carrier, and a second-stage planetary shaft is convexly disposed at a side of the second-stage planetary carrier facing the second-stage planetary shaft, and is inserted into the second-stage planetary hole;

The second-stage sun gear rotates along with the first-stage planet carrier, so that the second-stage planet gear is driven to rotate around the second-stage sun gear, and the second-stage planet shaft rotates along with the second-stage planet gear, so that the second-stage planet carrier is driven to rotate around the central shaft.