rotary drive

Abstract

The embodiment of the application discloses a rotary driver, which comprises a shell, a driving part, a connecting seat and a transmission structure; the connecting seat is rotationally connected with the shell; the driving part transmits the driving force outputted by the driving part to the connecting seat through the transmission structure, and then converts the movement outputted by the driving part into rotary movement, so that the adjustment space is reduced; the connecting seat has a first connecting end and a second connecting end which are bidirectionally connected along the rotation axis direction of the connecting seat, and then can be applied to the adjustment of different parts, so that the application range of the rotary driver is wider.

Description

Technical Field

[0001] This invention relates to the field of drive device technology, and more particularly to a rotary drive. Background Technology

[0002] Adjustable sofas and chairs, common in everyday life, can be adjusted using linear actuators to adjust the headrests and lumbar support to meet optimal usage requirements.

[0003] However, since linear actuators require linear motion for adjustment, their overall size is relatively large, and the adjustment space required by the linear motion is also large when using linear actuators for adjustment, which increases the overall volume of items that need to be adjusted, such as sofas or chairs. Summary of the Invention

[0004] Therefore, it is necessary to propose a rotary actuator that occupies less adjustment space to address the above problems.

[0005] This invention provides a rotary driver, the rotary driver comprising:

[0006] A housing, wherein the housing has an internal mounting cavity;

[0007] A driving element is mounted on the housing, and the driving element outputs driving force through its output terminal;

[0008] A connecting seat is rotatably connected to the outer shell. The connecting seat has a first connecting end and a second connecting end passing through the outer shell along its rotation axis. Both the first connecting end and the second connecting end are used to connect with an external structure, so that the external structure can rotate synchronously with the connecting seat around its rotation axis.

[0009] The driving component and the connecting seat have a transmission structure located in the mounting cavity. The driving component transmits its output driving force to the connecting seat through the transmission structure, thereby driving the connecting seat to rotate.

[0010] The embodiments of the present invention have the following beneficial effects:

[0011] The rotary driver of the present invention, by setting a rotating connecting seat, not only converts the motion output by the driving component into rotational motion, reducing the adjustment space, but also makes the rotary driver into a structure that can be bidirectionally connected through both ends of the connecting seat, which can be applied to the adjustment of different parts, making the rotary driver more widely applicable. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] in:

[0014] Figure 1 An exploded view of a rotary actuator according to an embodiment of the present invention is shown;

[0015] Figure 2 A partial structural schematic diagram of a rotary actuator according to an embodiment of the present invention is shown;

[0016] Figure 3 A schematic diagram of the structure of the second half-shell of a rotary actuator according to an embodiment of the present invention is shown;

[0017] Figure 4 A schematic diagram of the structure of a drive block of a rotary driver according to an embodiment of the present invention is shown;

[0018] Figure 5 A schematic diagram of the connecting base, transmission structure, and connection structure between driving components of a rotary driver is shown according to an embodiment of the present invention.

[0019] Figure 6 A partial cross-sectional view of a rotary drive according to an embodiment of the present invention is shown;

[0020] Figure 7 A schematic diagram of the structure of the first half-shell of a rotary actuator according to an embodiment of the present invention is shown;

[0021] Figure 8 The diagram shows an installation schematic of a rotary actuator mounted on different structures according to an embodiment of the present invention;

[0022] Figure 9 This diagram illustrates the installation of a rotary actuator connector according to an embodiment of the present invention when it is configured in one manner.

[0023] Figure 10 A schematic diagram of the installation of a rotary drive connector according to an embodiment of the present invention is shown when it has a different structure. Detailed Implementation

[0024] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0025] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0027] This invention provides a rotary actuator that can be used to adjust the headrest and lumbar support of a sofa or chair, or to adjust the firmness of a mattress. In one embodiment, please refer to... Figure 1 and Figure 2 The rotary actuator includes a housing 1, a driving component 2, a connecting base 3, and a transmission structure 4. The housing 1 serves as the frame of the entire rotary actuator and provides an installation environment for the other structures within it. The housing 1 has an internal mounting cavity 13. Specifically, the housing 1 includes a detachably connected first half-shell 11 and a second half-shell 12. The two half-shells can be fixed together by screws, a snap-fit ​​structure, or a locking structure. The specific method of connection between the first half-shell 11 and the second half-shell 12 is not limited here. Each end of the first half-shell 11 and the second half-shell 12 used for interconnection has a mounting cavity 13, allowing the two mounting cavities 13 to enclose and form a closed mounting cavity 13 when connected.

[0028] The drive component 2 is mounted on the outer casing 1. Specifically, the drive component 2 is mounted on the end of the first half-shell 11 facing away from the second half-shell 12, and the output end of the drive component 2 extends into the mounting cavity 13. The drive component 2 outputs driving force through its output end. It should be noted that, in this embodiment of the invention, the drive component 2 has an output shaft, and the drive component 2 can output rotational force around its output shaft. For example, the drive component 2 can be a stepper motor.

[0029] The connecting seat 3 is rotatably connected to the outer shell 1. The connecting seat 3 has a first connecting end 36 and a second connecting end 37 spaced apart along its rotation axis. Both the first connecting end 36 and the second connecting end 37 are used to connect to an external structure, allowing the external structure to rotate synchronously with the connecting seat 3 around its rotation axis. It should be noted that the connecting seat 3 is located within the mounting cavity 13, and the first connecting end 36 and the second connecting end 37 respectively penetrate the first half-shell 11 and the second half-shell 12, enabling both ends of the connecting seat 3 to connect to an external structure. It is worth mentioning that the connecting seat 3 is spaced apart from the driving component 2. In this embodiment of the invention, the connecting seat 3 is cylindrical in shape, with its axis coinciding with its rotation axis, and the rotation axis of the connecting seat 3 is parallel to the output shaft of the driving component 2.

[0030] The transmission structure 4 is installed in the mounting cavity 13 and is located between the driving member 2 and the connecting seat 3. The transmission structure 4 is used to connect the driving member 2 and the connecting seat 3, so that the driving member 2 can transmit its output driving force to the connecting seat 3 through the transmission structure 4, thereby driving the connecting seat 3 to rotate.

[0031] By setting up a transmission structure 4 and a connecting seat 3 rotatably connected to the outer casing 1, the driving force of the driving component 2 can be transmitted to the connecting seat 3, thereby driving the connecting seat 3 to rotate. By fixing the external structure to the connecting seat 3, the external structure can rotate with the connecting seat 3. The rotary actuator of the present invention converts the driving force of the driving component 2 into the rotational motion of the connecting seat 3. The rotation of the connecting seat 3 drives the movement of the external connecting structure. Compared with the linear motion of linear rotary actuators in related technologies, this is beneficial to reducing the overall size of the rotary actuator and also to reducing the space occupied when using the rotary actuator.

[0032] Since the first connecting end 36 and the second connecting end 37 respectively penetrate the first half-shell 11 and the second half-shell 12, the external structure can be connected to the rotary driver either through the first connecting end 36 or through the second connecting end 37. Please refer to... Figure 10The diagram shows rotary actuators used to adjust the angles of different parts of the sofa. The upper rotary actuator is used to adjust the angle of the headrest. As shown in the diagram, the rotary actuator is connected to the movable part of the headrest via a connecting seat 3 at one end of the second half-shell 12, thus allowing adjustment of the headrest angle. The lower rotary actuator is used to adjust the angle of the sofa's lumbar support. The second half-shell 12 of the rotary actuator is fixedly connected to the lumbar support bracket with screws. The rotary actuator is connected to the lumbar adjustment structure via a connecting seat 3 at one end of the first half-shell 11, thus allowing adjustment of the lumbar structure. Therefore, by using a connecting seat 3 that extends through the entire outer shell 1, the rotary actuator is designed with a bidirectional connection between its two ends, enabling adjustments to different parts of the sofa, such as the headrest and lumbar support, thus broadening the range of adjustable parts. Of course, the above only illustrates the adjustment of two parts of the sofa and does not represent all applicable adjustment parts.

[0033] In one embodiment, please combine Figure 3 and Figure 4 The transmission structure 4 includes a drive block 41 that moves along a preset direction and a transmission rod 42 that is rotatably arranged. When the drive block 41 moves, it can drive the connecting seat 3 to rotate. It should be noted that, in this embodiment of the invention, the preset direction is a direction perpendicular to the rotation axis of the connecting seat 3. The driving force output by the drive member 2 can drive the transmission rod 42 to rotate. When the transmission rod 42 rotates, it can drive the drive block 41 to translate along the preset direction, thereby driving the connecting seat 3 to rotate.

[0034] Specifically, a guide member 50 is provided inside the outer casing 1 along the direction of movement of the drive block 41. The guide member 50 has a guide groove 51 along the direction of movement of the drive block 41. The drive block 41 is located between the connecting seat 3 and the guide member 50 in the mounting cavity 13. One end of the drive block 41 can abut and fit into the guide groove 51, and the other end is used to connect with the connecting seat 3. By setting the guide member 50 and the guide groove 51, the direction of movement of the drive block 41 can be limited. It is worth mentioning that since the outer casing 1 includes a first half-shell 11 and a second half-shell 12, when setting the guide member 50, half of the guide member 50 can be set at the corresponding position of the first half-shell 11 and the second half-shell 12, or a whole guide member 50 can be set on the first half-shell 11 or the second half-shell 12, and a clearance cavity can be set at the corresponding position of the other half-shell, so that the guide member 50 can make way when the first half-shell 11 and the second half-shell 12 are connected.

[0035] In one specific embodiment, the drive block 41 and the connecting seat 3 can be connected by a gear connection. Specifically, the drive block 41 includes a middle portion 411 and a side portion 412 disposed on the middle portion 411. The shape of the middle portion 411 should be adapted to the shape of the guide groove 51. Preferably, the middle portion 411 is a cylinder, and the inner wall of the guide groove 51 is also configured as an arc surface that fits the outer wall of the middle portion 411. The end of the side portion 412 facing the connecting seat 3 is provided with a drive tooth 4121 along the moving direction of the drive block 41. The outer wall of the connecting seat 3 is provided with an outer edge tooth 31 for meshing with the drive tooth 4121 at the position corresponding to the drive tooth 4121. It should be noted that the total length of the drive tooth 4121 on the side portion 412 needs to be equal to or greater than the total length of the outer edge tooth 31 on the connecting seat 3. Through the meshing of the outer edge tooth 31 with the drive tooth 4121, the connecting seat 3 can be driven to rotate when the drive block 41 moves. It is worth mentioning that the outer edge tooth 31 is arranged around the axis of the connecting seat 3, and the angle between its first end and its tail end around the axis of the connecting seat 3 can be any angle. In practical applications, this angle is preferably 120°.

[0036] It should be noted that two side portions 412 are preferably provided on the middle portion 411. The two side portions 412 are respectively provided at opposite ends of the middle portion 411, and each of the two side portions 412 has a drive tooth 4121 at the end facing the connecting seat 3 along the direction of movement of the drive block 41. The connecting seat 3 has an outer edge tooth 31 that meshes with the drive teeth 4121 at the positions corresponding to the two rows of drive teeth 4121. By providing two rows of drive teeth 4121, the connection area between the drive block 41 and the connecting seat 3 can be increased, making the connection between the two more stable. At the same time, the force on both sides of the drive block 41 can be more balanced, the movement can be more stable, and the connecting seat 3 and the drive block 41 can withstand greater torque.

[0037] This embodiment mentions that a guide 50 is provided inside the outer casing 1 to limit the movement direction of the drive block 41. To make the movement of the drive block 41 more stable, please refer to... Figure 9Alternatively, two spaced limiting plates 111 can be provided at the position of the first half shell 11 or the second half shell 12 near the side portion 412. An abutment plate 4122 is provided at one end of the side portion 412 near the limiting plate 111. When the middle portion 411 fits into the guide groove 51, the abutment plate 4122 abuts against the bottom surface of the upper limiting plate 111, and the side of the side portion 412 away from the abutment plate 4122 abuts against the other limiting plate 111. Thus, the two limiting plates 111 clamp one side plate, which helps to prevent the drive block 41 from rotating during movement. When two side portions 412 are provided, one side portion 412 is located inside the first half shell 11 and the other is located inside the second half shell 12. At this time, two limiting plates 111 can be provided in the first half shell 11 and the second half shell 12 respectively for limiting, or only two limiting plates 111 can be provided in one half shell for limiting. The side portion 412 in the other half shell is limited by one side abutting against the surface of the guide member 50 and the other side abutting against the plate rib structure provided inside the half shell.

[0038] It should be noted that the rotation axis of the transmission rod 42 is parallel to the moving direction of the drive block 41, and the transmission rod 42 includes a transmission part 421 that passes through the intermediate part 411 along the moving direction of the drive block 41 and is threadedly connected to the intermediate part 411. The transmission rod 42 also includes a driven part 422 integrally formed with the transmission part 421. Both the transmission part 421 and the driven part 422 are cylindrical structures, and their axes coincide. A driven tooth is provided on the outer wall of the driven part 422 around its axis. A worm gear 21 is provided on the output end of the drive member 2 for meshing with the driven tooth. Through the cooperation between the worm gear 21 and the driven tooth, the entire transmission rod 42 can be driven to rotate, thereby driving the drive block 41 to move. It should be noted that at least two enclosure plates 14 are provided on the first half shell 11 and the second half shell 12 at the positions corresponding to the driven part 422. The two enclosure plates 14 on one half shell form a half of the rotation space that is adapted to the transmission part 421. When the two half shells are connected, the four enclosure plates 14 form a whole rotation space for the driven part 422 to be adapted, so that the entire transmission rod 42 can rotate.

[0039] In this embodiment, a first positioning block 60 and a second positioning block 61 are provided on the middle portion 411 along its moving direction. The second positioning block 61 is fixed to one end of the middle portion 411 near the driven portion 422, and the first positioning block 60 is detachably connected to the middle portion 411 along its moving direction. A circuit board 90 for controlling the opening and closing of the drive component 2 is fixed inside the first half-shell 11 by screws. The drive component 2 is electrically connected to the circuit board 90. After the circuit board 90 is powered on, it can send control signals to the circuit board 90 through an external controller, thereby controlling the opening and closing of the drive component 2. It can also control the angle at which the drive component 2 drives the connecting seat 3 to rotate. It should be noted that... Figure 5The first positioning block 60 and the second positioning block 61 are located inside the first half-shell 11. Inside the first half-shell 11, on the moving path of the first positioning block 60 and the second positioning block 61, there are first limit switches 91 and second limit switches 92 that can contact the first positioning block 60 and the second positioning block 61 respectively. The first limit switches 91 and the second limit switches 92 are both electrically connected to the circuit board 90 and can control the opening and closing of the drive unit 2 independently.

[0040] It should be noted that the first positioning block 60 and the second positioning block 61 are positioned within the first half-shell 11 between the first limit switch 91 and the second limit switch 92. The second limit switch 92 is located within the first half-shell 11 near the driven part 422, while the first limit switch 91 is located within the first half-shell 11 away from the driven part 422, along the moving direction of the drive block 41. It is worth mentioning that the distance between the first limit switch 91 and the second limit switch 92 needs to be set according to the maximum rotation angle required by the connecting seat 3.

[0041] By setting the first limit switch 91 and the second limit switch 92, the maximum angle required for the rotation of the connecting seat 3 can be limited. Specifically, when the connecting seat 3 is in the initial position, the second positioning block 61 abuts against the second limit switch 92. At this time, the external controller sends a signal to the circuit board 90 to activate the drive element 2, which activates the drive element 2 to move the drive block 41, thereby causing the connecting seat 3 to rotate. Simultaneously, the first positioning block 60 moves towards the first limit switch 91. When the connecting seat 3 rotates to its maximum angle, the first positioning block 60 just contacts the first limit switch 91, and the first limit switch 91 controls the circuit board 90 to close the drive element 2. When it is necessary to rotate the connecting seat 3 to the maximum angle in the opposite direction, the external controller sends a signal to the circuit board 90 to control the drive element 2 to move the drive block 41 in the opposite direction, thereby causing the connecting seat 3 to rotate in the opposite direction. When the drive block 41 moves to the point where the second positioning block 61 contacts the second limit switch 92, the circuit board 90 controls the drive element 2 to close, at which point the connecting seat 3 just rotates to its maximum angle.

[0042] In a more specific embodiment, a positioning strip 413 is provided on the intermediate portion 411. The positioning strip 413 has a preset length and extends from the end of the intermediate portion 411 near the driven portion 422 along the moving direction of the intermediate portion 411 towards the driven portion 422. Multiple positioning holes 4131 are provided on the positioning strip 413 along its length. These positioning holes 4131 can be spaced apart or interconnected. A second positioning block 61 is fixed on the intermediate portion 411 and located at the end of the positioning strip 413 near the driven portion 422. The first positioning block 60 can be fixed to the intermediate portion 411 by connecting it to the positioning holes 4131 with screws. It should be noted that, in order to make the angle adjustment more precise when adjusting the rotation angle of the connecting seat 3, it is preferable to connect the multiple positioning holes 4131, that is, the multiple positioning holes 4131 overlap, but the overlapping part between two adjacent positioning holes 4131 cannot be greater than the size of the screw, that is, the screw cannot be moved from one positioning hole 4131 to another positioning hole 4131.

[0043] It should be noted that the first half-shell 11 has a through groove 112 on the moving path of the first positioning block 60 and the second positioning block 61, and a cover plate 113 is provided on the through groove 112 for closing and opening the through groove 112. Opening the cover plate 113 will expose the first positioning block 60 and the second positioning block 61 inside through the through groove 112, so as to change the position of the first positioning block 60 on the middle part 411.

[0044] By setting the positioning bar 413, the distance between the first positioning block 60 and the second positioning block 61 can be changed, thereby changing the maximum rotation angle of the connecting seat 3. Specifically, in the initial position, the second positioning block 61 contacts the second limit switch 92. By changing the position of the first positioning block 60 on the positioning bar 413, the distance at which the first positioning block 60 moves to contact the first limit switch 91 can be changed. The greater this distance, the greater the rotation angle of the connecting seat 3, and vice versa. Therefore, the distance between the first limit switch 91 and the second limit switch 92 determines the absolute angle at which the connecting seat 3 can rotate, while the distance between the first positioning block 60 and the second positioning block 61 determines the angle at which the connecting seat 3 can rotate within the absolute maximum angle defined by the first limit switch 91 and the second limit switch 92, thus facilitating the change of the stroke of the rotary drive.

[0045] In another specific embodiment, please refer to Figure 6The drive block 41 and the connecting seat 3 can also be connected by a movable connection. Specifically, the connecting seat 3 has a movable channel 34 running through it along the movable path of the drive block 41, allowing the drive block 41 to pass through the movable channel 34 during its movement. The connecting seat 3 also has a connecting groove 35 of a predetermined length. In this embodiment, a connecting groove 35 is provided on the end face of the connecting seat 3 at both the first connecting end 36 and the second connecting end 37. The connecting groove 35 communicates with the movable channel 34, and the two connecting grooves 35 have the same opening direction and shape and size. The following description only takes the connecting groove 35 located on the end face of the connecting seat 3 at the first connecting end 36 as an example. The connecting groove 35 is opened from the position close to the first connecting end 36 toward the direction away from the first connecting end 36. The drive block 41 is provided with a connecting post 414 at the position corresponding to the two connecting grooves 35, which is adapted to be inserted into the connecting groove 35. When the drive block 41 moves in a preset direction, the connecting post 414 can move in the connecting groove 35.

[0046] It should be noted that when the connecting seat 3 rotates to the point where the opening direction of the connecting groove 35 is perpendicular to the moving direction of the driving block 41, the driving block 41 and the connecting groove 35 are directly opposite each other. At this time, the connecting post 414 and the end of the connecting groove 35 away from the driving block 41 are just touching or not yet touching. This can prevent the connecting post 414 from getting stuck between the connecting groove 35 during the movement of the driving block 41. Then, by moving the connecting post 414 along the opening path of the connecting groove 35, the connecting seat 3 can be driven to rotate.

[0047] In one embodiment, please refer to Figure 1 The rotary actuator also includes a mounting member 70 for fixing the housing 1. The mounting member 70 can be fixedly connected to the housing 1 by screws. Depending on the actual application scenario, the mounting member 70 needs to be installed on the second half-shell 12 by screws, and the installation position is close to the drive member 2. At least one mounting post 71 for connecting to the mounting member 70 is also provided on the housing 1 at the position where the mounting member 70 is installed. The mounting member 70 has a through hole corresponding to the position of the mounting post 71, which is adapted to be inserted into the mounting post 71. When installing the mounting member 70, the mounting post 71 is first inserted into the through hole, and then the mounting member 70 is fixed with screws. It should be noted that the mounting post 71 can also be provided with threaded holes. In some cases, the mounting post 71 can be directly inserted into the structure to be connected and then fixed with screws. Figure 9 The image shows a case where the connection is directly fixed via the mounting post 71.

[0048] It should be noted that the connecting seat 3 has a connecting hole 32 extending through it along its axis of rotation, and the inner wall of the connecting hole 32 is provided with anti-slip teeth 33 protruding around the axis of the connecting seat 3. The rotary drive also includes a connecting member 80, which has a connecting part 81 for insertion and adaptation with the connecting hole 32, and a fixing part 82 integrally formed with the connecting part 81. The outer wall of the connecting part 81 is provided with an anti-slip groove 811 around its axis for insertion and adaptation with the anti-slip teeth 33. When the connecting part 81 is inserted and adapted into the connecting hole 32, the anti-slip teeth 33 can be inserted and adapted into the anti-slip groove 811, thereby preventing relative rotation between the connecting part 81 and the connecting seat 3.

[0049] It is worth mentioning that the fixing part 82 is used to fix the external structure. The shape of the fixing part 82 will vary depending on the structure to be fixed. For example, please refer to... Figure 9 and Figure 10 For example, when the surface of the structure to be fixed is flat, the fixing part 82 can be disc-shaped. During fixing, the connecting part 81 can be inserted through the external connecting structure first, and then the fixing part 82 can be fixed to the external connecting structure with screws. The fixing part 82 can also be a rectangular structure with an arc groove. When the surface of the external connecting structure to be connected is curved, the curved surface of the external connecting structure can be abutted against the arc groove of the fixing part 82 for fixation. The structure of the fixing part 82 is not subject to many limitations; it needs to be set according to the actual situation in practical applications.

[0050] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0051] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A rotary actuator, characterized in that, include: A housing, wherein the housing has an internal mounting cavity; A driving element is mounted on the housing, and the driving element outputs driving force through its output terminal; A connecting seat is rotatably connected to the outer shell. The connecting seat has a first connecting end and a second connecting end passing through the outer shell along its rotation axis. Both the first connecting end and the second connecting end are used to connect with an external structure, so that the external structure can rotate synchronously with the connecting seat around its rotation axis. A transmission structure is provided between the driving component and the connecting seat. The transmission structure is located within the mounting cavity. The driving component transmits its output driving force to the connecting seat through the transmission structure, thereby driving the connecting seat to rotate. The transmission structure includes a drive block that moves in a preset direction and a rotatably mounted transmission rod. The transmission rod is connected to the output end of the drive component. The transmission rod includes a transmission part that passes through the drive block along the moving direction of the drive block and is threadedly connected to the drive block. The drive block is connected to the connecting seat, so that when the drive block moves, it can drive the connecting seat to rotate. The drive block is provided with a first positioning block and a second positioning block. The position of at least one of the first positioning block and the second positioning block is adjustable. A circuit board is provided inside the housing. A first limit switch for contacting the first positioning block and a second limit switch for contacting the second positioning block are provided at intervals inside the housing. Both the first limit switch and the second limit switch are connected to the circuit board and can independently control the opening and closing of the drive component. The drive block is provided with a positioning strip, which has a preset length and the length direction of the positioning strip is parallel to the moving direction of the drive block. The positioning strip has a plurality of positioning holes along its length direction, and the first positioning block has screws for fixing in the positioning holes.

2. The rotary actuator according to claim 1, characterized in that, The transmission rod also includes a driven part connected to the transmission part, the driven part being provided with driven teeth, and the output end of the driving member being provided with a turbine for meshing with the driven teeth.

3. The rotary actuator according to claim 1, characterized in that, The drive block is provided with drive teeth along its moving direction, and the connecting seat is provided with outer edge teeth for meshing with the drive teeth.

4. The rotary actuator according to claim 3, characterized in that, The drive block has two rows of parallel drive teeth along its moving direction, and the connecting seat has outer edge teeth that mesh with the drive teeth at positions corresponding to the two rows of drive teeth.

5. The rotary actuator according to claim 1, characterized in that, The connecting seat has a through-hole for the movement of the drive block, and the connecting seat also has a connecting groove of a predetermined length. The drive block is provided with a connecting post that is compatible with the connecting groove. When the drive block moves in a preset direction, it can drive the connecting seat to rotate by moving along the opening path of the connecting groove through the connecting post.

6. The rotary actuator according to claim 1, characterized in that, A guide member is provided inside the housing along the direction of movement of the drive block. The guide member has a guide groove along the direction of movement of the drive block. One end of the drive block can abut and fit into the guide groove, and the other end is used to connect with the connecting seat.

7. The rotary actuator according to claim 1, characterized in that, The outer casing has through slots along the moving paths of the first positioning block and the second positioning block, and the through slots are covered with cover plates for closing and opening the through slots.

8. The rotary actuator according to claim 1, characterized in that, The rotary drive further includes a mounting component for fixing the housing, the housing having at least one mounting post for connecting with the mounting component, the mounting component being able to be fixedly connected to the mounting post by screws.

9. The rotary actuator according to claim 1, characterized in that, The connecting seat has a connecting hole extending through its axis of rotation, and anti-slip teeth protrude from the connecting hole. The rotary driver also includes a connector, which has an anti-slip groove for fitting into the anti-slip teeth.

10. The rotary actuator according to claim 1, characterized in that, The outer shell includes a first half-shell and a second half-shell that can be detachably connected. The first half-shell and the second half-shell are each provided with an open mounting cavity at one end where they are connected to each other. Thus, when the first half-shell and the second half-shell are connected, they form a closed mounting cavity. The driving component is disposed on the first half-shell, and the connecting seat is located in the mounting cavity. Both ends of the connecting seat penetrate the first half-shell and the second half-shell respectively.

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