CN210687044U

CN210687044U - Rotary opening and closing structure controlled by stepping motor

Info

Publication number: CN210687044U
Application number: CN201921579599.3U
Authority: CN
Inventors: 金清伟
Original assignee: Zhejiang Jieheng Environmental Technology Co Ltd
Current assignee: Zhejiang Jieheng Environmental Technology Co Ltd
Priority date: 2019-09-23
Filing date: 2019-09-23
Publication date: 2020-06-05
Anticipated expiration: 2029-09-23

Abstract

The utility model provides a rotatory structure that opens and shuts of step motor control, a serial communication port, include: the blades are uniformly distributed along a circumference; the rotary opening and closing structure is provided with a closed state and an opened state, the blades are sequentially abutted in the closed state, and are separated from each other in the opened state, and a middle channel is formed in the middle; the blade is fixed on the fixing seat, the rotating unit comprises a main body part and a support, the main body part is connected with the support, a first transmission unit is arranged on the main body part, a second transmission unit matched with the first transmission unit is arranged on the blade, and the first transmission unit is driven by the cooperation of the second transmission unit to rotate the blade.

Description

Rotary opening and closing structure controlled by stepping motor

Technical Field

The utility model relates to a rotatory structure that opens and shuts of step motor control.

Background

The opening and closing structure in the prior art is suitable for various industrial applications, such as various fluid valves (gaseous, liquid and solid particles), door products in the building industry, door products in various furniture industries or table structures and the like.

The opening and closing structure in the prior art may have the following problems: the structure is complex, and the cost is high; the opening area is difficult to control, and the adjustment to the required opening size is not facilitated; the opening and closing structure has low automation degree and is not beneficial to making various controls.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the above-mentioned not enough that exists among the prior art, and provide a rotatory structure that opens and shuts of step motor control that structural design is reasonable.

The embodiment of the utility model provides a solve the technical scheme that above-mentioned problem adopted and be: a rotary opening and closing structure controlled by a stepping motor is characterized by comprising:

the blades are uniformly distributed along a circumference; the rotary opening and closing structure is provided with a closed state and an opened state, the blades are sequentially abutted in the closed state, and are separated from each other in the opened state, and a middle channel is formed in the middle; and

the blade is fixed on the fixing seat, the rotating unit comprises a main body part and a support, the main body part is connected with the support, a first transmission unit is arranged on the main body part, a second transmission unit matched with the first transmission unit is arranged on the blade, and the first transmission unit is driven by the cooperation of the second transmission unit to rotate the blade.

In one embodiment, the blade has a first positioning unit, and the blade rotates around the axis of the first positioning unit, so that the rotary opening and closing structure is switched between the closed state and the open state.

In one embodiment, the fixing base is provided with a plurality of second positioning units along the circumferential direction thereof, and the second positioning units are matched with the first positioning units.

In one embodiment, the first transmission unit is a transmission column, and the second transmission unit is a transmission groove.

In one embodiment, the transmission groove has two ends, and when the transmission groove is in an open state, the transmission column is located at one end of the transmission groove, and when the transmission groove is in a closed state, the transmission column is located at the other end of the transmission groove.

In one embodiment, the main body portion is provided with an avoiding groove, and when the main body portion is matched with the blade, the first positioning unit of the blade is accommodated in the avoiding groove.

In one embodiment, the avoiding groove extends along a circumference, and a central angle of the avoiding groove occupying the circumference is larger than a central angle of the transmission groove occupying the circumference.

In one embodiment, the vanes have a first edge and a second edge, the first edge of any one vane mates with the second edge of an adjacent vane in the closed position; the first rim includes an outwardly convex curve and the second rim includes an inwardly concave curve.

In one embodiment, the outward convex curve has a first end and a second end, the first end is an end close to the inward concave curve, and the distance from the outward convex curve to the first positioning unit gradually increases in the direction from the first end to the second end.

In one embodiment, the vane has a third edge, and the third edge of the vane forms an outer contour of the rotary opening and closing structure in the closed state; the third edges include a curve, and in the closed state, the outer contour formed between the third edges of the vanes is circular or elliptical.

Compared with the prior art, the utility model, have following one or more advantages and effect: the structure is simple, and the design is reasonable; the distance from the convex curve to the first positioning unit is gradually increased, so that the blades cannot be influenced mutually when being opened; the rotary opening and closing structure can be applied to the field of pipelines, is used for opening and closing the pipelines and plays a role similar to a fluid (gas, liquid or solid small particle) valve; the rotary opening and closing structure can also be applied to the building industry, such as door products, and when the rotary opening and closing structure is in an opening state, the middle channel is equivalent to an opened door; the rotary opening and closing structure can also be used for door products or table top structures in the furniture industry, when the rotary opening and closing structure is used for the table top structure, the blades are equivalent to the table top and can be used as a cabinet, a stool or a tea table, and the blades can also be combined for use to form a large table top or a large table top; the automatic control of the blades can be realized through the rotating mechanism so as to control the opening, closing and opening of the blades; the blades can be flexibly controlled by the rotating mechanism through the matching of the first transmission unit and the second transmission unit; the first transmission unit is a transmission column, and the second transmission unit is a transmission groove, so that the transmission principle is very simple, and the cost is lower.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

Fig. 1 is a schematic front view of the rotary opening and closing structure in embodiment 1.

Fig. 2 is a schematic view of the structure of the blade of fig. 1.

Fig. 3 is a front view of a rotary opening and closing structure in an embodiment.

Fig. 4 is a front view of the rotary opening and closing structure in an embodiment, showing a state of having 5 blades.

Fig. 5 is a schematic view illustrating an opening process of a vane of the rotary opening and closing structure of fig. 1.

Fig. 6 is a schematic view illustrating an opening process of the vane of the rotary opening and closing structure of fig. 3.

Fig. 7 is a schematic view showing a process in which a single blade of the rotary opening and closing structure of fig. 1 is opened.

Fig. 8 is a schematic front view of the rotary opening/closing structure in embodiment 2.

Fig. 9 is an exploded view of the first rotary opening and closing mechanism of fig. 8.

Fig. 10 is a second exploded view of the rotary opening and closing mechanism of fig. 8.

Fig. 11 is a front view configuration diagram of the rotary opening and closing structure in embodiment 3.

Fig. 12 is a state diagram of the rotary opening and closing structure of fig. 11 when the vanes are opened.

Fig. 13 is an exploded view of the rotary opening and closing structure in embodiment 3.

Fig. 14 is a front view configuration diagram of the rotary opening and closing structure in embodiment 4.

Fig. 15 is a state diagram of the rotary opening and closing structure of embodiment 4 when the vanes are opened.

Fig. 16 is an exploded view of the rotary opening and closing structure in example 4.

Fig. 17 is a front view configuration diagram of the rotary opening and closing structure in embodiment 5.

Fig. 18 is a state diagram of the rotary opening and closing structure of embodiment 5 when the vanes are opened.

Fig. 19 is an exploded schematic view of the rotary opening and closing structure in embodiment 5.

Fig. 20 is a front view configuration diagram of the rotary opening and closing structure in embodiment 6.

Fig. 21 is a state diagram of the rotary opening and closing structure of embodiment 6 when the vanes are opened.

Fig. 22 is an exploded view of the rotary opening and closing structure according to embodiment 6.

Fig. 23 is a second exploded view of the rotary opening and closing structure in example 6.

FIG. 24 is a schematic view of a rotary shutter structure in another embodiment.

Detailed Description

The present invention will be described in further detail by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not intended to limit the present invention.

Example 1.

Referring to fig. 1 to 7, the rotary opening and closing structure of the present embodiment includes a plurality of blades 1 and a driving unit (not shown) for driving the blades 1 to rotate.

The plurality of blades 1 in this embodiment are arranged uniformly along a circumference. The number of blades 1 is at least 2. In some embodiments, the number of blades 1 may be 3, 4, 5, or 6, etc. As shown in fig. 1, the number of blades 1 is set to 4. As shown in fig. 4, the number of the blades 1 is set to 5.

The rotary opening and closing structure in this embodiment has a closed state and an open state, in the closed state, the blades 1 are sequentially abutted, in the open state, the blades 1 are separated from each other, and a middle passage is formed in the middle.

The blade 1 in this embodiment has a first positioning unit 14, and the blade 1 can rotate around the axis of the first positioning unit 14, so that the rotary opening and closing structure is switched between the closed state and the open state. In this embodiment, the first positioning unit 14 may be a rotating shaft or a shaft hole. In other embodiments, the vane 1 may be actuated by other actuation methods to switch the rotary opening and closing structure between the closed state and the open state, for example, the vane 1 may be translated, rotated or a combination thereof to switch between the closed state and the open state. Fig. 5 is a schematic view showing an opening process of the vane 1, and as shown in fig. 5, the vane 1 is rotated from inside to outside to open during the opening process, and finally forms an intermediate passage in the middle, and in an open state, the intermediate passage is circular or approximately circular.

The vanes 1 in this embodiment have a first edge 11 and a second edge 12, and in the closed state, the first edge 11 of any vane 1 matches the second edge 12 of the adjacent vane 1. Preferably, when the first rim 11 and the second rim 12 are mated, the two abut and form a seal or substantial seal with each other.

Referring to fig. 2, the first rim 11 of the present embodiment includes a convex curve 111, the convex curve 111 is substantially convex, and the second rim 12 includes a concave curve 121, the concave curve 121 is substantially concave. The convex curve 111 has a first end and a second end, and the first end is close to the concave curve 121. In one embodiment, the distance from the convex curve 111 to the first positioning unit 14 gradually increases from the first end to the second end. In this way, the adjacent blades 1 are prevented from being obstructed in the opening process of the blades 1. Specifically, for example, in the direction from the first end to the second end, if sampling points a1, a2, A3, a4, a5, A6, and a7 are taken, and distances from the sampling points a1, a2, A3, a4, a5, A6, and a7 to the center of the first positioning unit 14 are d1, d2, d3, d4, d5, d6, and d7, respectively, then d1< d2< d3< d4< d5< d6< d 7. The distance from the second end to the center of the first positioning unit 14 is d8, then d1< d2< d3< d4< d5< d6< d7< d 8.

Referring to fig. 2, in the present embodiment, the vane 1 further has a third edge 13, and in the closed state, the third edge 13 of the vane 1 forms an outer contour of the rotary opening and closing structure, that is, the outer contour of the rotary opening and closing structure is formed by the third edges 13 of the vane 1. In an embodiment, the third rim 13 comprises a curve, and the outer contour formed between the third rims 13 of the blades 1 in the closed state is circular or elliptical. As shown in fig. 3, in an embodiment, the third rim 13 comprises a first line 131 and a second line 132, and the outer contour formed between the third rims 13 of the blades 1 is substantially polygonal in the closed state. Referring to fig. 3, in one embodiment, the outer profile formed between the third edges 13 of the blades 1 is substantially square, in which case the first and second

straight lines

131 and 132 are perpendicular, and the number of the blades 1 is set to 4 groups. The first straight line 131 of one blade 1 is matched with the second straight line 132 of the adjacent blade 1, the two straight lines are positioned on the same straight line, and one side of the square is formed (the side of the square can be continuous or broken). As shown in fig. 6, the opening process of the vane 1 of fig. 3 is shown. The intermediate passage of different shapes, such as circular or substantially circular, or square or substantially square, can be formed by the difference in the degree of opening of the vane 1 in fig. 6.

The driving unit 2 in this embodiment is connected to the vane 1 to drive the vane 1 to rotate around the axis of the first positioning unit 14, so as to control the vane 1 to switch between the closed state and the open state. The driving unit 2 can control the individual vanes 1 to rotate and open or close, and can also control all the vanes 1 to open or close together. As shown in fig. 7, fig. 7 shows a process of opening the single vane 1.

The rotary opening and closing structure in the embodiment can be applied to the field of pipelines, is used for opening and closing the pipelines and plays a role similar to a fluid (gas, liquid or solid small particle) valve.

The rotary opening and closing structure in the embodiment can also be applied to the building industry, such as door products, and the middle channel is equivalent to an opened door in the opening state.

The rotary opening and closing structure in the embodiment can also be used for door products or table top structures in the furniture industry. When the blade 1 is used for a table top structure, the blade 1 is equivalent to a table top and can be used as a cabinet, a stool or a tea table, and the blades 1 can be combined to form a large table top or a table top.

Example 2.

Referring to fig. 8 to 10, in the present embodiment, a rotary opening and closing structure is disclosed, which includes a blade 1 and a driving unit 2. The blade 1 can be substantially the same as the blade 1 of embodiment 1. The driving unit 2 controls the blades 1 to rotate, so that the selective opening and closing structure is switched between a closed state and an open state.

The driving unit 2 in this embodiment drives all the blades 1 to rotate simultaneously, thereby realizing the switching between the closed state and the open state.

Specifically, the driving unit 2 includes a fixing base 21, a rotating unit 22, and a rotating mechanism 23 for driving the rotating unit 22 to rotate.

The fixing base 21 in this embodiment is used for fixing the blade 1. Specifically, the fixing base 21 is provided with a plurality of second positioning units 211 along the circumferential direction thereof, and the second positioning units 211 are matched with the first positioning units 14 of the blade 1. In this embodiment, the first positioning unit 14 employs a shaft hole, and the second positioning unit 211 employs a rotating shaft matched with the shaft hole. When the blade 1 is engaged on the fixed base 21 through the first positioning unit 14, the blade 1 can realize relative rotation through the engagement of the first positioning unit 14 and the second positioning unit 211. The fixing base 21 in this embodiment is an annular structure, and the second positioning units 211 are uniformly disposed on the fixing base 21 along the circumferential direction.

The rotating unit 22 in this embodiment includes a main body 221 and a bracket 222, the main body 221 is connected to the bracket 222, the main body 221 is provided with the first transmission units 2211 with the same number as the blades 1, the blades 1 are provided with the second transmission units 15, and the second transmission units 15 are matched with the first transmission units 2211. Specifically, the first transmission unit 2211 drives the blade 1 to rotate around the first positioning unit 14 by cooperating with the second transmission unit 15. In this embodiment, the first transmission unit 2211 is a transmission column, and the second transmission unit 15 is a transmission slot. When the transmission post moves, the transmission post moves in the transmission groove and controls the blades 1 to correspondingly rotate. The transmission groove is provided with two ends, when the transmission groove is in an opening state, the transmission column is positioned at one end of the transmission groove, and when the transmission groove is in a closed state, the transmission column is positioned at the other end of the transmission groove. On the other hand, the two ends of the transmission groove limit the rotation angle of the transmission column, so that the blades can only be switched between an open state, a closed state and an intermediate state.

The rotating mechanism 23 in this embodiment may be a motor, such as a stepping motor. When the stepping motor is operated, the transmission shaft of the stepping motor controls the bracket 222 to rotate, so that the bracket 222 drives the main body 221 to rotate, and when the main body 221 rotates, the first transmission unit 2211 rotates along a circle and drives the blades to rotate through the second transmission unit 15 matched with the first transmission unit 2211.

In this embodiment, the main body 221 is provided with an avoiding groove 2212, and when the main body 221 is matched with the blade 1, the first positioning unit 14 of the blade 1 can be accommodated in the avoiding groove 2212, so as to prevent the first positioning unit 14 from influencing the matching between the blade 1 and the main body 221. The avoiding groove 2212 extends along a circumference, and the central angle of the avoiding groove 2212 occupying the circumference is larger than that of the transmission groove occupying the circumference.

In this embodiment, the fixing base 21 is in a relatively stationary state, and when the main body 221 rotates under the action of the stepping motor, the first transmission unit 2211 and the second transmission unit 15 move relatively, that is, the blades 1 rotate along with the first transmission unit 2211 and the second transmission unit 2211, so that the blades 1 can be opened or closed simultaneously. Meanwhile, the size of the cross section of the middle channel can be controlled by the rotation change of the blade 1 so as to adapt to the use requirement.

Example 3.

Referring to fig. 11 to 13, in the present embodiment, a rotary opening and closing structure is disclosed, which includes a blade 1 and a driving unit 3. The blade 1 can be substantially the same as the blade 1 of embodiment 1. The driving unit 2 controls the blades 1 to rotate, so that the selective opening and closing structure is switched between a closed state and an open state.

The driving unit 3 in this embodiment includes a fixing base 31 and a plurality of pushing portions 32. The number of the pushing portions 32 is the same as the number of the blades 1. That is, each of the pushing portions 32 controls one blade 1 to rotate.

The fixing base 31 in this embodiment is provided with a second positioning unit 311. The number of the second positioning units 31 is the same as the number of the blades 1, and the second positioning units 311 are engaged with the first positioning units 14. In this embodiment, the first positioning unit 14 employs a shaft hole, and the second positioning unit 311 employs a rotating shaft matched with the shaft hole. When the blade 1 is engaged with the fixed seat 31 through the first positioning unit 14, the blade 1 can rotate relatively through the engagement of the first positioning unit 14 and the second positioning unit 311. The fixing base 31 in this embodiment is an annular structure, and the second positioning units 311 are uniformly disposed on the fixing base 31 along the circumferential direction.

The blade 1 in this embodiment is provided with a transmission part 16, and the transmission part 16 is kept at a distance from the first positioning unit 14. The pushing portion 32 is connected to the transmission portion 16. The pushing part 32 may push the transmission part 16 so that the blade 1 rotates centering on the first positioning unit 14.

Specifically, in the present embodiment, the transmission portion 16 is a transmission slot, and the pushing portion 32 includes a link 322 with a hook 321, the hook 321 is fitted in the transmission slot, and the link 322 acts on the transmission slot in a pushing or pulling manner, so that the blade 1 obtains a force for rotating the blade.

The pushing portion 32 in this embodiment includes a power portion 323, and the power portion 323 is connected to the connecting rod 322. The power unit 323 in this embodiment may be a push-pull electromagnet, which includes an electromagnet connected to the connecting rod 322, which is known in the art and will not be described herein. In other embodiments, the power unit 323 may also adopt a cylinder structure, a screw rod structure, etc. in the prior art, which is not exemplified here.

The fixing seat 31 in this embodiment is in a static state, and when the electromagnet receives a signal to perform a pushing or pulling action, the blade 1 is pulled to rotate, and the blade 1 performs an opening or closing action, so that the rotary opening and closing structure is switched between a closed state and an open state. Each blade 1 is driven by an electromagnet, so that the blades 1 can be opened and closed independently or together, and the size of the cross section of the middle channel can be controlled in such a way.

Example 4.

Referring to fig. 14 to 16, in the present embodiment, a rotary opening and closing structure is disclosed, which includes a blade 1 and a driving unit 4. The blade 1 can be substantially the same as the blade 1 of embodiment 1. The driving unit 4 controls the blades 1 to rotate, so that the selective opening and closing structure is switched between a closed state and an open state.

The driving unit 4 in this embodiment includes a fixing base 41 and a plurality of rotating units 42. The number of the rotary units 42 is the same as the number of the blades 1. That is, each of the rotary units 42 controls one blade 1 to rotate.

The fixing base 41 in this embodiment is provided with a second positioning unit 411. The number of second positioning units 41 is the same as the number of blades 1 and the second positioning units 411 cooperate with the first positioning units 14. In this embodiment, the first positioning unit 14 is a rotating shaft, and the second positioning unit 411 is a shaft hole matched with the rotating shaft. When the blade 1 is matched on the fixed seat 41 through the first positioning unit 14, the blade 1 can realize relative rotation through the matching of the first positioning unit 14 and the second positioning unit 411. The fixing base 41 in this embodiment is an annular structure, and the second positioning units 411 are uniformly disposed on the fixing base 41 along the circumferential direction.

The rotating unit 42 in this embodiment is a motor. The motor is directly connected with the rotating shaft of the blade 1, and the motor can directly drive the blade 1 to rotate when working. The motor in this embodiment is fixed to the holder 41. Specifically, a fixing column 412 is disposed on the fixing base 41, and the motor is fixed to the fixing base 41 through the fixing column 412.

The fixing base 41 in this embodiment is in a stationary state, and when the motor receives a signal to operate, the blade 1 rotates along with the motor, and the blade 1 is opened or closed. Each blade 1 is driven by a motor, so that the blades 1 can be opened and closed independently or together, and the size of the cross section of the middle channel can be controlled in such a way.

Example 5.

Referring to fig. 17 to 19, in the present embodiment, a rotary opening and closing structure is disclosed, which includes a blade 1 and a driving unit 5. The blade 1 can be substantially the same as the blade 1 of embodiment 1. The driving unit 5 controls the blades 1 to rotate, so that the selective opening and closing structure is switched between a closed state and an open state.

The drive unit 5 in this embodiment includes a holder 51. The fixed base 51 is provided with second positioning units 511, the number of the second positioning units 51 is the same as that of the blades 1, and the second positioning units 511 are matched with the first positioning units 14. In this embodiment, the first positioning unit 14 is a shaft hole, and the second positioning unit 511 is a rotating shaft, so as to realize the matching. When the blade 1 is engaged with the fixed base 51 through the first positioning unit 14, the blade 1 can rotate relatively through the engagement of the first positioning unit 14 and the second positioning unit 511. The fixing base 51 in this embodiment is an annular structure, and the second positioning units 511 are uniformly disposed on the fixing base 51 along the circumferential direction.

The driving unit 5 in this embodiment further includes a gear ring 52, a first gear 53 and a driving motor 54. The driving motor 54 is connected to the first gear 53, and when the driving motor 54 works, the first gear 53 is driven to rotate. The first gear 53 is engaged with the ring gear 52, and when the first gear 53 rotates, the ring gear 52 is rotated. The drive motor 54 in the present embodiment may be a stepping motor.

The blade 1 in this embodiment is provided with a gear 17. The gearing 17 of all the blades meshes with the toothed ring 52. That is, when the ring gear 52 rotates, the driving gear 17 is driven to rotate, and the vane 1 is driven to rotate, so that the vane is switched between the closed state and the open state. That is, by a driving motor 54, the synchronous rotation of all the blades 1 can be achieved.

The ring gear 52 in this embodiment comprises an inner toothing and an outer toothing, wherein the inner toothing meshes with the gearing 17 of the blade 1 and the outer toothing meshes with the first gear wheel 53.

In the present embodiment, in the closed state, the outer contour dimension of the vane 1 does not exceed the outer contour dimension of the ring gear 53. So that the overall size can be controlled.

Example 6.

Referring to fig. 20 to 23, in the present embodiment, a rotary opening and closing structure is disclosed, which includes a blade 1 and a driving unit 6. The blade 1 can be substantially the same as the blade 1 of embodiment 1. The driving unit 6 controls the blades 1 to rotate, so that the selective opening and closing structure is switched between a closed state and an open state.

The drive unit 6 in this embodiment includes a holder 61. The fixing base 61 is provided with second positioning units 611, the number of the second positioning units 61 is the same as that of the blades 1, and the second positioning units 611 are matched with the first positioning units 14. In this embodiment, the first positioning unit 14 is a shaft hole, and the second positioning unit 611 is a rotating shaft, so as to achieve the matching. When the blade 1 is engaged with the fixed base 61 through the first positioning unit 14, the blade 1 can rotate relatively through the engagement of the first positioning unit 14 and the second positioning unit 611. The fixing base 61 in this embodiment is a flat plate structure, and the second positioning units 611 are uniformly disposed on the fixing base 61 along a circumference.

The driving unit 6 in this embodiment further includes a link portion 62 and a driving portion 63, the link portion 62 is provided with first transmission units 621 having the same number as the blades 1, the blades 1 are provided with second transmission units 18, and the second transmission units 18 are matched with the first transmission units 621. Specifically, the first transmission unit 621 drives the blade 1 to rotate centering on the first positioning unit 14 by cooperating with the second transmission unit 18. In this embodiment, the first transmission unit 621 is a transmission post, and the second transmission unit 18 is a transmission slot. When the transmission post moves, the transmission post moves in the transmission groove and controls the blades 1 to correspondingly rotate. The transmission groove is provided with two ends, when the transmission groove is in an opening state, the transmission column is positioned at one end of the transmission groove, and when the transmission groove is in a closed state, the transmission column is positioned at the other end of the transmission groove. On the other hand, the two ends of the transmission groove limit the rotation angle of the transmission column, so that the blades can only be switched between an open state, a closed state and an intermediate state.

The link portion 62 in this embodiment is rotatably provided on the fixing base 61. Specifically, the link portion 62 has a central hole 623, and the fixing base 61 has a link shaft 612, and the link shaft 612 is inserted into the central hole 623 and engaged, so that the link portion 62 is rotatably disposed on the fixing base 61. The first positioning unit 14 of each blade 1 in the present embodiment is at equal or substantially equal distances from the central hole 623.

The link portion 62 in this embodiment is provided with a tooth portion 622. The driving portion 63 includes a driving motor 631 and a driving tooth 632, the driving tooth 632 is engaged with the tooth portion 622, and an output shaft of the driving motor 631 is connected with the driving tooth 632. Therefore, when the driving motor 631 is operated, the link portion 62 is driven to rotate around the link rotation shaft 612, so that all the blades 1 are simultaneously driven to rotate, and the closed state and the open state are switched.

In this embodiment, the connecting rod portion 62 is provided with a limiting groove 624, the fixing base 61 is correspondingly provided with a limiting post 613, and the limiting post 613 is disposed in the limiting groove 624. Due to the interaction of the limiting groove 624 and the limiting post 613, the rotation angle of the link portion 62 can be limited to prevent the blade 1 from over-rotating.

The connecting rod portion 62 in this embodiment is further provided with a clearance groove 625, and the fixing portion 61 is provided with a connecting rod fixing post 614 and the connecting rod fixing post 614 can be accommodated in the clearance groove 625.

The fixing base 61 in this embodiment is in a stationary state, and when the driving motor 631 receives a signal to operate, the blade 1 rotates along with the driving motor, and the blade 1 is opened or closed. All the blades 1 are controlled by the connecting rod part 62 together, so that the blades 1 can be opened and closed simultaneously, and the size of the cross section of the middle channel can be controlled.

Referring to fig. 24, in another embodiment, the basic mechanism is the same as that of the above embodiment, except that the driving portion is not provided, and the link portion 62 is manually pushed.

The above description in this specification is merely illustrative of the present invention. Various modifications, additions and substitutions may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.

Claims

1. A rotary opening and closing structure controlled by a stepping motor is characterized by comprising:

2. The stepping motor controlled rotary opening and closing structure according to claim 1, wherein: the blade is provided with a first positioning unit, and the blade rotates by taking the axis of the first positioning unit as a center, so that the rotary opening and closing structure is switched between a closed state and an open state.

3. The stepping motor controlled rotary opening and closing structure according to claim 2, wherein: the fixing seat is provided with a plurality of second positioning units along the circumferential direction of the fixing seat, and the second positioning units are matched with the first positioning units.

4. The stepping motor controlled rotary opening and closing structure according to claim 2, wherein: the first transmission unit is a transmission column, and the second transmission unit is a transmission groove.

5. The stepping motor controlled rotary opening and closing structure according to claim 4, wherein: the transmission groove is provided with two ends, when the transmission groove is in an opening state, the transmission column is positioned at one end of the transmission groove, and when the transmission groove is in a closing state, the transmission column is positioned at the other end of the transmission groove.

6. The stepping motor controlled rotary opening and closing structure according to claim 4, wherein: the main body part is provided with an avoiding groove, and when the main body part is matched with the blade, the first positioning unit of the blade is accommodated in the avoiding groove.

7. The stepping motor controlled rotary opening and closing structure according to claim 6, wherein: the avoiding groove extends along a circumference, and the central angle of the avoiding groove occupying the circumference is larger than that of the transmission groove occupying the circumference.

8. The stepping motor controlled rotary opening and closing structure according to claim 2, wherein: the blades are provided with a first edge and a second edge, and the first edge of any one blade is matched with the second edge of the adjacent blade in the closed state; the first rim includes an outwardly convex curve and the second rim includes an inwardly concave curve.

9. The stepper motor controlled rotary opening and closing structure of claim 8, wherein: the convex curve is provided with a first end and a second end, the first end is close to the end of the concave curve, and the distance from the convex curve to the first positioning unit is gradually increased in the direction from the first end to the second end.

10. The stepper motor controlled rotary opening and closing structure of claim 8, wherein: the blade is provided with a third edge, and the third edge of the blade forms an outer contour of a rotary opening and closing structure in the closed state; the third edges include a curve, and in the closed state, the outer contour formed between the third edges of the vanes is circular or elliptical.