A rotating screen actuator

Abstract

The present invention discloses a rotating screen actuator, comprising: a shell, a transmission sleeve passing through the shell and rotatably connected to the shell, a driving mechanism, a central axis coaxially sliding through the transmission sleeve, a swing angle control unit assembled on the central axis and located on the side of the transmission sleeve away from the shell, and an elastic member assembled on the central axis and pressed on the side of the transmission sleeve away from the swing angle control unit. The swing angle control unit comprises a clamping sleeve coaxially fixedly assembled on the central axis and detachably clamped with the transmission sleeve, and a limiting mechanism assembled on the central axis and in contact with the side of the clamping sleeve away from the transmission sleeve. A protrusion is protruding from the transmission sleeve. The limiting mechanism comprises a pair of limiting arms with adjustable spacing and respectively located on both sides of the protrusion. When the driving mechanism cannot operate normally, the central axis can be pulled away from the elastic member to drive the clamping sleeve to separate from the transmission sleeve. At this time, the central axis can be artificially driven to rotate.

Description

Technical Field

[0001] The present invention relates to the technical field related to intelligent actuators, and in particular to a rotating screen actuator. Background Art

[0002] Intelligent control actuators receive electrical signals and change the manipulated variable according to the size of the signal, so that the material quantity or energy of the input or output object is changed to achieve the purpose of automatic adjustment. Nowadays, intelligent control actuators have been applied in various fields. Intelligent control actuators mainly include PCB boards, motors and power transmission mechanisms connected to the motors. The motors and power transmission components constitute the driving mechanism of the intelligent control actuators.

[0003] Intelligent control actuators will be used in multiple fields. For example, an intelligent control actuator is used to drive the screen to rotate. It has a rotatable rotation axis. According to different installation methods, it can drive the screen to adjust the pitch angle, or drive the screen to rotate, such as rotating between vertical and horizontal screens. However, when the intelligent actuator cannot work normally, such as when a malfunction occurs, the connected screen cannot be rotated, and the actuator cannot be driven to rotate through manual operation, which will cause discomfort to the user. Therefore, it is necessary to design a rotating screen actuator. Summary of the invention

[0004] In view of the above technical problems, the purpose of the present invention is to overcome the problem in the prior art that the screen cannot rotate when the driving mechanism cannot work normally.

[0005] In order to achieve the above-mentioned object, the present invention provides a rotary screen actuator, comprising: a housing, a transmission sleeve passing through the housing and rotatably connected to the housing, a driving mechanism for rotating the transmission sleeve, a central shaft coaxially sliding through the transmission sleeve, a yaw angle control unit assembled on the central shaft and located on a side of the transmission sleeve away from the housing, and an elastic member assembled on the central shaft and pressed on a side of the transmission sleeve away from the yaw angle control unit;

[0006] The yaw angle control unit includes a clamping sleeve which is coaxially fixedly mounted on the central axis and detachably engaged with the transmission sleeve, and a limiting mechanism which is mounted on the central axis and contacts the side of the clamping sleeve away from the transmission sleeve. A protrusion is protruding from the transmission sleeve, and the limiting mechanism includes a pair of limiting arms with adjustable spacing and respectively located on both sides of the protrusion.

[0007] Preferably, a first annular step groove is coaxially recessed on one side of the transmission sleeve close to the clamping sleeve, a second annular step groove is coaxially recessed on the first annular step groove, a first annular clamping portion is coaxially arranged on the first annular step groove, the clamping sleeve is in sliding contact with the side wall of the first annular step groove and is provided with a second annular clamping portion matching the first annular clamping portion, and the protrusion is arranged on the second annular step groove and is located on the inner side of the first annular clamping portion.

[0008] Preferably, the transmission sleeve is spaced apart from the central shaft to allow a pair of limiting arms to pass through, and at least one mounting portion fixedly connected to the central shaft is protruded from the inner wall of the transmission sleeve.

[0009] Preferably, the limiting mechanism further comprises a first adjusting ring coaxially slidably sleeved on the central shaft and in sliding contact with the end surface of the transmission sleeve, a second adjusting ring coaxially slidably sleeved on the central shaft and in sliding contact with a side of the first adjusting ring away from the transmission sleeve, and a locking ring threadedly sleeved on the central shaft and capable of pressing and holding the side of the second adjusting ring away from the first adjusting ring;

[0010] A pair of the limiting arms are fixedly mounted on the first adjusting ring and the second adjusting ring respectively. The first adjusting ring is coaxially provided with an arc-shaped through groove for the limiting arms on the second adjusting ring to pass through.

[0011] Preferably, at least one auxiliary groove is recessed on the outer side wall of the locking ring.

[0012] Preferably, the snap-fit ​​sleeve is provided with a first annular flange that can contact the end of the transmission sleeve, the side wall of the first annular flange is provided with scale lines distributed along its circumferential direction, and the outer side walls of the first adjustment ring and the second adjustment ring are provided with indicator marks matching the scale lines.

[0013] Preferably, a PCB board electrically connected to the driving mechanism is mounted inside the housing, a magnet is mounted on the end of the central axis located inside the housing, and a magnetic angle sensor corresponding to the magnet is mounted on the PCB board.

[0014] Preferably, the driving mechanism includes a helical gear fixedly connected coaxially with the transmission sleeve, the end of the central axis located outside the outer shell is connected to a mounting frame, a limiting member is assembled on the outside of the end of the central axis away from the mounting frame, and the elastic member is a spring whose two ends respectively contact the limiting member and the helical gear.

[0015] Preferably, a second annular flange is coaxially protruded on the end of the transmission sleeve close to the clamping sleeve and is in sliding contact with the outer wall of the outer shell, and a third annular flange is protruded inside the outer shell and is sleeved on the outside of the spring and has an inner diameter smaller than the outer diameter of the limit member, and the maximum distance between the limit member and the third annular flange is 1-1.5 times the engagement depth between the first annular clamping portion and the second annular clamping portion.

[0016] Preferably, the transmission sleeve is rotatably connected to the housing via a bearing.

[0017] According to the above technical solution, the present invention provides a rotating screen actuator, which has the following beneficial technical effects compared with the prior art:

[0018] First, when the driving mechanism cannot operate normally, the central shaft can be pulled away from the elastic member to drive the clamping sleeve to separate from the transmission sleeve. At this time, the central shaft can be driven to rotate manually. When the driving mechanism cannot operate, the central shaft can also be manually operated to rotate.

[0019] Secondly, the rotation range of the central axis can be adjusted by adjusting the distance between a pair of limit arms. The position of the limit arm can be adjusted according to the specific usage scenario. When the central axis is manually rotated so that the limit arm contacts the protrusion, the angle at which the screen is rotated by the central axis is the commonly used rotation angle, which can reduce the difficulty of manual operation and can also quickly rotate the central axis to the desired angle under manual operation.

[0020] Other features and advantages of the present invention will be described in detail in the subsequent specific implementation mode; and the parts not involved in the present invention are the same as the prior art or can be implemented by using the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention but do not constitute a limitation of the present invention. In the accompanying drawings:

[0022] Figure 1 It is a three-dimensional structural schematic diagram of a rotating screen actuator provided by the present invention;

[0023] Figure 2 It is a schematic diagram of the three-dimensional structure of a rotating screen actuator provided by the present invention with the outer shell removed;

[0024] Figure 3 It is a cross-sectional view of a rotary screen actuator provided by the present invention;

[0025] Figure 4 It is a partial three-dimensional structural schematic diagram of a rotating screen actuator provided by the present invention;

[0026] Figure 5 It is a partial hierarchical schematic diagram of a rotating screen actuator provided by the present invention.

[0027] Description of Reference Numerals

[0028] 1. Shell; 2. Transmission sleeve; 3. Central axis; 4. Elastic member; 5. Snap sleeve; 6. Protrusion; 7. Limit arm; 8. First annular snap-fitting portion; 9. Second annular snap-fitting portion; 10. Mounting portion; 11. First adjustment ring; 12. Second adjustment ring; 13. Locking ring; 14. Superior arc-shaped through groove; 15. Auxiliary groove; 16. First annular flange; 17. Scale line; 18. Indicator mark; 19. PCB board; 20. Magnet; 21. Magnetic angle sensor; 22. Bevel gear; 23. Mounting frame; 24. Limit member; 25. Second annular flange; 26. Third annular flange. DETAILED DESCRIPTION

[0029] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0030] In the present invention, unless otherwise stated, directional words such as "upper, lower, inside, outside" contained in a term merely represent the orientation of the term in normal usage, or are common names understood by those skilled in the art, and should not be regarded as limitations on the term.

[0031] like Figure 1-5 As shown, a rotary screen actuator comprises: a housing 1, a transmission sleeve 2 passing through the housing 1 and rotatably connected to the housing 1, a driving mechanism for rotating the transmission sleeve 2, a central shaft 3 coaxially sliding through the transmission sleeve 2, a yaw angle control unit assembled on the central shaft 3 and located on a side of the transmission sleeve 2 away from the housing 1, and an elastic member 4 assembled on the central shaft 3 and pressed on a side of the transmission sleeve 2 away from the yaw angle control unit;

[0032] The yaw angle control unit includes a clamping sleeve 5 which is coaxially fixedly mounted on the central shaft 3 and detachably clamped with the transmission sleeve 2, and a limiting mechanism which is mounted on the central shaft 3 and contacts the side of the clamping sleeve 5 away from the transmission sleeve 2. A protrusion 6 is protruded from the transmission sleeve 2, and the limiting mechanism includes a pair of limiting arms 7 with adjustable spacing and respectively located on both sides of the protrusion 6.

[0033] In the above technical solution, the driving mechanism will drive the transmission sleeve 2 to rotate, and the transmission sleeve 2 will drive the clamping sleeve 5 connected to it to rotate, thereby driving the central shaft 3 to rotate, and the central shaft 3 can drive the screen connected to it to rotate; in the event of a power outage or other circumstances, when the driving mechanism cannot operate normally, the central shaft 3 can be pulled away from the elastic member 4 to drive the clamping sleeve 5 to separate from the transmission sleeve 2. At this time, the central shaft 3 can be driven to rotate manually. After releasing the central shaft 3, the elastic member 4 will push the central shaft 3 to slide on the transmission sleeve 2 to return to its original position, so that the clamping sleeve 5 is clamped with the transmission sleeve 2 again. In the case that the driving mechanism cannot operate, the central shaft 3 can also be manually operated to rotate, thereby driving the connected screen to rotate.

[0034] When the central shaft 3 is driven to rotate manually, the transmission sleeve 2 is in a stationary state, that is, the position of the protrusion portion is fixed, and the central shaft 3 will drive a pair of limit arms 7 to move. When the limit arms 7 are in contact with the protrusion portion, the central shaft 3 has rotated in one direction to the maximum angle. The role of the pair of limit arms 7 and the protrusion portion is to control the range of manual operation.

[0035] The rotation range of the central axis 3 can be adjusted by adjusting the distance between a pair of limit arms 7. The position of the limit arms 7 can be adjusted according to specific usage scenarios. When the central axis 3 is manually rotated so that the limit arms 7 come into contact with the protrusions, the angle at which the screen is rotated by the central axis 3 is a commonly used rotation angle, which can reduce the difficulty of manual operation and can also quickly rotate the central axis 3 to a desired angle under manual operation.

[0036] In a preferred embodiment of the invention, a first annular step groove is coaxially recessed on one side of the transmission sleeve 2 close to the clamping sleeve 5, a second annular step groove is coaxially recessed on the first annular step groove, a first annular clamping portion 8 is coaxially arranged on the first annular step groove, the clamping sleeve 5 is in sliding contact with the side wall of the first annular step groove and is provided with a second annular clamping portion 9 matching the first annular clamping portion 8, and the protrusion 6 is arranged on the second annular step groove and is located on the inner side of the first annular clamping portion 8.

[0037] In the above technical solution, when the first annular clamping portion 8 and the second annular clamping portion 9 are in a clamping state, the driving mechanism can drive the clamping sleeve 5 to rotate through the transmission sleeve 2; when the central shaft 3 is manually pulled, the clamping sleeve 5 will be driven to separate from the transmission sleeve 2. Because the first annular clamping portion 8 and the second annular clamping portion 9 are both annular, after the central shaft 3 rotates, the elastic member 4 will push the central shaft 3 to slide, driving the clamping sleeve 5 to clamp with the transmission sleeve 2 again.

[0038] In a preferred embodiment of the invention, the transmission sleeve 2 is spaced apart from the central shaft 3 to allow a pair of limit arms 7 to pass through, and at least one mounting portion 10 fixedly connected to the central shaft 3 is protruded from the inner wall of the transmission sleeve 2 .

[0039] In the above technical solution, the optimal number of the mounting portions 10 is two, and the two mounting portions 10 are evenly distributed around the circumference of the transmission sleeve 2 , which can improve the installation stability of the transmission sleeve 2 and will not hinder the limiting arm 7 .

[0040] In a preferred embodiment of the invention, the limiting mechanism further comprises a first adjusting ring 11 coaxially slidably sleeved on the central shaft 3 and in sliding contact with the end surface of the transmission sleeve 2, a second adjusting ring 12 coaxially slidably sleeved on the central shaft 3 and in sliding contact with the side of the first adjusting ring 11 away from the transmission sleeve 2, and a locking ring 13 threadedly sleeved on the central shaft 3 and capable of pressing the second adjusting ring 12 on the side away from the first adjusting ring 11;

[0041] A pair of the limiting arms 7 are fixedly mounted on the first adjusting ring 11 and the second adjusting ring 12 respectively. The first adjusting ring 11 is coaxially provided with an arc-shaped through groove 14 for the limiting arms 7 on the second adjusting ring 12 to pass through.

[0042] In the above technical solution, by loosening the locking ring 13, the first adjusting ring 11 and the second adjusting ring 12 can be rotated to adjust the distance between a pair of limit arms 7, and then the locking ring 13 is tightened so that the locking ring 13 is tightly pressed on the second adjusting ring 12. At this time, the locking ring 13 and the clamping sleeve 5 will tightly clamp the first adjusting ring 11 and the second adjusting ring 12, so that the first adjusting ring 11 and the second adjusting ring 12 will not slide relative to each other with the clamping sleeve 5.

[0043] The locking ring 13 can also be loosened and not tightened again. At this time, the first adjustment ring 11 and the second adjustment ring 12 can slide freely, and the pair of limit arms 7 no longer play a limiting role, and the central axis 3 can be manually driven to rotate at any angle.

[0044] In a preferred embodiment of the present invention, at least one auxiliary groove 15 is recessed on the outer side wall of the locking ring 13 .

[0045] In the above technical solution, a tool, such as a bolt cutter or other rod-shaped member, can be used to insert into the auxiliary groove 15, so that the locking ring 13 can be rotated more quickly and labor-savingly.

[0046] In a preferred embodiment of the invention, the clamping sleeve 5 is provided with a first annular flange 16 that can contact the end of the transmission sleeve 2, and the side wall of the first annular flange 16 is provided with scale lines 17 distributed along its circumferential direction, and the outer side walls of the first adjustment ring 11 and the second adjustment ring 12 are provided with indicator marks 18 matching the scale lines 17.

[0047] In the above technical solution, through the scale lines 17 and the indicator marks 18, when the first adjustment ring 11 and the second adjustment ring 12 are rotated, the angles of rotation of the first adjustment ring 11 and the second adjustment ring 12 can be known, so as to adjust the positions of the pair of limit arms 7.

[0048] In a preferred embodiment of the invention, a PCB board 19 electrically connected to the driving mechanism is installed inside the shell 1, a magnet 20 is installed on the end of the central axis 3 located inside the shell 1, and a magnetic angle sensor 21 corresponding to the magnet 20 is installed on the PCB board 19.

[0049] In the above technical solution, the magnetic angle sensor 21 cooperates with the magnet 20. The magnetic angle sensor 21 obtains the rotation angle by sensing the magnetic field generated by the magnet 20, and can know the rotation angle of the central axis 3 in real time, thereby obtaining the rotation angle of the screen in real time; even after power failure, the magnetic angle sensor 21 stops working, and artificial rotation of the central axis 3 will drive the magnet 20 to rotate. After power is turned on, the magnetic angle sensor 21 cooperates with the magnet 20 to obtain the rotation angle of the central axis 3.

[0050] In a preferred embodiment of the invention, the driving mechanism includes a bevel gear 22 coaxially fixedly connected to the transmission sleeve 2, the end of the center shaft 3 located outside the outer shell 1 is connected to a mounting bracket 23, and a limiting member 24 is assembled on the outer side of the end of the center shaft 3 away from the mounting bracket 23, and the elastic member 4 is a spring whose two ends respectively contact the limiting member 24 and the bevel gear 22.

[0051] In the above technical solution, the driving mechanism is an existing mature technology, and is usually composed of various common transmission parts, such as gears, worms, etc. The worm can drive the bevel gear 22 to rotate, the mounting frame 23 is connected to the screen, and the central axis 3 can be divided into two parts to facilitate the assembly of other parts.

[0052] In a preferred embodiment of the invention, a second annular flange 25 is coaxially protruded on the end of the transmission sleeve 2 close to the clamping sleeve 5 and is in sliding contact with the outer wall of the outer shell 1. A third annular flange 26 is protruded inside the outer shell 1 and is sleeved on the outside of the spring and has an inner diameter smaller than the outer diameter of the limit member 24. The maximum distance between the limit member 24 and the third annular flange 26 is 1-1.5 times the engagement depth between the first annular clamping portion 8 and the second annular clamping portion 9.

[0053] In the above technical scheme, there are two ways to install the transmission sleeve 2, one of which is the above-mentioned assembly method. Due to the limiting effect between the third annular flange 26 and the limiting member 24, the spacing of the movement of the center shaft 3 along its axis is controlled, thereby controlling the spacing of the movement of the transmission sleeve 2 along the axis direction; when the center shaft 3 is artificially driven to slide, force can be applied to the mounting frame 23 or the screen to drive the center shaft 3 to slide, and the first annular flange 16 is separated from the second annular flange. The transmission sleeve 2 can slide at this time, but the sliding amplitude is less than 1.4 mm, which will not affect the normal use of the transmission sleeve 2; and the elastic member 4 will drive the center shaft 3 to slide back to its original position, and the first annular flange 16 will be pressed again on the second annular flange 25, so that the transmission sleeve 2 returns to its original position.

[0054] In a preferred embodiment of the invention, the transmission sleeve 2 is rotatably connected to the housing 1 via a bearing.

[0055] In the above technical solution, another installation method of the transmission sleeve 2 is to assemble it on the housing 1 through a bearing, and at this time the transmission sleeve 2 can only rotate.

[0056] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, a variety of simple modifications can be made to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

[0057] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0058] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A rotating screen actuator, characterized in that: include: A housing (1), a transmission sleeve (2) passing through the housing (1) and rotatably connected to the housing (1), a driving mechanism for rotating the transmission sleeve (2), a central shaft (3) coaxially slidingly passing through the transmission sleeve (2), a yaw angle control unit mounted on the central shaft (3) and located on a side of the transmission sleeve (2) away from the housing (1), and an elastic member (4) mounted on the central shaft (3) and pressed on a side of the transmission sleeve (2) away from the yaw angle control unit; The deflection angle control unit comprises a clamping sleeve (5) coaxially fixedly mounted on the central shaft (3) and detachably clamped with the transmission sleeve (2), and a limiting mechanism mounted on the central shaft (3) and in contact with a side of the clamping sleeve (5) away from the transmission sleeve (2); a protrusion (6) is protruding from the transmission sleeve (2), and the limiting mechanism comprises a pair of limiting arms (7) with adjustable spacing and respectively located on both sides of the protrusion (6).

2. A rotating screen actuator according to claim 1, characterized in that: A first annular step groove is coaxially recessed on one side of the transmission sleeve (2) close to the clamping sleeve (5), a second annular step groove is coaxially recessed on the first annular step groove, a first annular clamping portion (8) is coaxially disposed on the first annular step groove, the clamping sleeve (5) is in sliding contact with the side wall of the first annular step groove and is provided with a second annular clamping portion (9) matching the first annular clamping portion (8), and the protrusion (6) is disposed on the second annular step groove and is located on the inner side of the first annular clamping portion (8).

3. A rotating screen actuator according to claim 2, characterized in that: The transmission sleeve (2) and the central shaft (3) are spaced apart to allow a pair of limit arms (7) to pass through, and at least one mounting portion (10) fixedly connected to the central shaft (3) is protrudingly provided on the inner wall of the transmission sleeve (2).

4. The rotary screen actuator according to claim 1, characterized in that: The limiting mechanism further comprises a first adjusting ring (11) coaxially slidably sleeved on the central shaft (3) and in sliding contact with the end surface of the transmission sleeve (2), a second adjusting ring (12) coaxially slidably sleeved on the central shaft (3) and in sliding contact with a side of the first adjusting ring (11) away from the transmission sleeve (2), and a locking ring (13) threadedly sleeved on the central shaft (3) and capable of pressing and holding the second adjusting ring (12) on a side away from the first adjusting ring (11); A pair of the limiting arms (7) are respectively fixedly mounted on a first adjustment ring (11) and a second adjustment ring (12); the first adjustment ring (11) is coaxially provided with an arc-shaped through groove (14) for the limiting arms (7) on the second adjustment ring (12) to pass through.

5. The rotary screen actuator according to claim 4, characterized in that: At least one auxiliary groove (15) is recessed on the outer side wall of the locking ring (13).

6. The rotary screen actuator according to claim 4, characterized in that: The clamping sleeve (5) is provided with a first annular flange (16) capable of contacting the end of the transmission sleeve (2); the side wall of the first annular flange (16) is provided with scale lines (17) distributed along its circumferential direction; and the outer side walls of the first adjustment ring (11) and the second adjustment ring (12) are both provided with indicator marks (18) matching the scale lines (17).

7. The rotary screen actuator according to claim 1, characterized in that: A PCB board (19) electrically connected to the driving mechanism is mounted inside the housing (1); a magnet (20) is mounted on the end of the central axis (3) located inside the housing (1); and a magnetic angle sensor (21) corresponding to the magnet (20) is mounted on the PCB board (19).

8. The rotary screen actuator according to claim 2, characterized in that: The driving mechanism comprises a bevel gear (22) fixedly connected coaxially with the transmission sleeve (2); the end of the central shaft (3) located outside the housing (1) is connected to a mounting frame (23); a limit member (24) is mounted outside the end of the central shaft (3) away from the mounting frame (23); and the elastic member (4) is a spring whose two ends respectively contact the limit member (24) and the bevel gear (22).

9. The rotary screen actuator according to claim 8, characterized in that: A second annular flange (25) is coaxially protruded from the end of the transmission sleeve (2) close to the clamping sleeve (5) and is in sliding contact with the outer wall of the housing (1). A third annular flange (26) is protruded from the inside of the housing (1) and is sleeved on the outside of the spring and has an inner diameter smaller than the outer diameter of the limiting member (24). The maximum distance between the limiting member (24) and the third annular flange (26) is 1 to 1.5 times the engagement depth between the first annular clamping portion (8) and the second annular clamping portion (9).

10. The rotary screen actuator according to claim 8, characterized in that: The transmission sleeve (2) is rotatably connected to the outer shell (1) via a bearing.

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