CN110091504B - Spin-drying equipment and control method thereof - Google Patents

Abstract

The invention provides a drying device and a control method thereof. The drying device is suitable for removing liquid resin attached to a three-dimensional printing workpiece, and comprises: a main shaft; a bracket fixedly connected to the main shaft for carrying the workpiece to rotate around the main shaft; a first driving device , for driving the main shaft to rotate through a transmission component; and a second driving device, connected with the main shaft through a clutch; wherein, the maximum speed of the first driving device is greater than that of the second driving device. , the rotation speed and rotation angle of the second driving device are controllable. The drying device of the invention can quickly remove the liquid resin attached to the workpiece, and is convenient to form a post-processing line of three-dimensional printing with other devices.

Description

Drying equipment and control method thereof

technical field

The invention mainly relates to three-dimensional printing, in particular to a drying device suitable for removing liquid resin attached to a three-dimensional printing workpiece and a control method of the drying device.

Background technique

The 3D printing technology is based on the computer 3D design model. Through the software layered discrete and numerical control molding system, the metal powder, ceramic powder, plastic, cell tissue and other special materials are stacked layer by layer by means of laser beams, hot melt nozzles, etc. Bonded, and finally superimposed to create a solid product. Different from the traditional manufacturing industry, which uses molds, turning and milling and other mechanical processing methods to shape and cut raw materials to finally produce finished products, three-dimensional printing transforms three-dimensional entities into several two-dimensional planes. Reduced manufacturing complexity. This digital manufacturing mode does not require complex processes, huge machine tools, or a lot of manpower. Parts of any shape can be generated directly from computer graphics data, enabling manufacturing to extend to a wider range of production groups.

The light curing method is a relatively mature three-dimensional printing technology, which uses the principle that the photosensitive resin is cured after being irradiated by ultraviolet light to carry out material accumulation molding. Specifically, the photocuring method is to irradiate the surface of the liquid photosensitive resin contained in the container with ultraviolet rays to form a layer of cured photosensitive resin, and then drop the layer of cured photosensitive resin by a certain distance, and coat it on it. Cover the liquid photosensitive resin, and then use ultraviolet light to irradiate the liquid photosensitive resin to form the next layer of cured photosensitive resin, and so on and so forth to finally form the three-dimensional workpiece to be printed. It can be seen from the above description that the printed workpiece is immersed in the liquid photosensitive resin. After the workpiece is taken out from the liquid photosensitive resin, the workpiece usually has unwanted photosensitive resin attached to it, so it needs to be removed in the subsequent process. Liquid photosensitive resin attached to the workpiece.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide a drying device suitable for removing the liquid resin attached to the three-dimensional printing workpiece and a control method of the drying device, which can quickly remove the liquid resin attached to the workpiece, and is convenient for mixing with the workpiece. Other equipment forms the post-processing pipeline for 3D printing.

In order to solve the above technical problems, the present invention provides a drying device suitable for removing liquid resin attached to a three-dimensional printing workpiece, comprising: a main shaft; a bracket fixedly connected to the main shaft for carrying the workpiece Rotating around the main shaft; a first driving device for driving the main shaft to rotate through a transmission component; and a second driving device connecting with the main shaft through a clutch; wherein, the highest of the first driving device The rotational speed is greater than the maximum rotational speed of the second driving device, and the rotational speed and the rotation angle of the second driving device are controllable.

In an embodiment of the present invention, when the drying device spins the workpiece, it includes an acceleration stage in which the main shaft rotates from a stationary state to a first rotation speed and a period in which the main shaft rotates at the first rotation speed. In the spin-drying stage, in at least a part of the acceleration stage, the first driving device and the second driving device jointly drive the main shaft to rotate.

In an embodiment of the present invention, when the drying device spins the workpiece, it includes a spin-drying stage in which the main shaft rotates at a first rotational speed and the main shaft rotates from the first rotational speed to a standstill. In the deceleration stage, the bracket has an initial position, and in the deceleration stage, the second driving device drives the main shaft to rotate through the clutch, and controls the rotation angle of the second driving device, so that the bracket is in the initial position when stationary.

In an embodiment of the present invention, when the drying device spins the workpiece, it includes a spin-drying stage in which the main shaft rotates at a first rotational speed and the main shaft rotates from the first rotational speed to a standstill. In the deceleration stage, the second driving device decelerates the main shaft through the clutch.

In an embodiment of the present invention, in the drying stage, the clutch disconnects the second driving device from the main shaft, and the first driving device drives the main shaft to rotate at the first rotational speed rotate.

In an embodiment of the present invention, the bracket includes a transverse arm and a longitudinal arm, the transverse arm and the longitudinal arm are connected in a T-shape, and the transverse arm has a tray for accommodating a tray. The accommodating space, where the tray is used to hold the workpiece, and the trailing arm is also fixedly connected with the main shaft.

In an embodiment of the present invention, the bracket includes a transverse arm and a longitudinal arm, the transverse arm and the longitudinal arm are connected in a T-shape, and the transverse arm has a tray for accommodating a tray. The accommodating space, where the pallet is used to hold the workpiece, the longitudinal arm is also fixedly connected with the main shaft, and the initial position is the horizontal position of the transverse arm.

In an embodiment of the present invention, an angle sensing device is further included for sensing the angle of the main shaft.

In an embodiment of the present invention, the angle sensing device includes a positioning plate and a photoelectric switch, the positioning plate rotates synchronously with the main shaft, and the positioning plate is provided with one or more light-transmitting areas on a circumference and one or more light-blocking regions, the photoelectric switch is arranged adjacent to the circumference, and is used for switching according to the switching of the light-passing region and the light-blocking region.

In an embodiment of the present invention, the transmission component is a belt or a gear set.

In an embodiment of the present invention, the second driving device is a stepping motor.

In an embodiment of the present invention, the clutch is an electromagnetic clutch.

Another aspect of the present invention provides a method for controlling a drying device, which is suitable for controlling the drying device as described above, comprising: a. closing the clutch to make the first driving device and the second driving device The driving devices jointly drive the main shaft to rotate; b. When the rotational speed of the main shaft is equal to the first rotational speed or greater than the maximum rotational speed of the second driving device, disconnect the clutch and stop the pair of second driving devices driving of the main shaft; and c. causing the first driving device to continue to drive the main shaft to rotate, so that the main shaft rotates at the first rotational speed.

In an embodiment of the present invention, after step c, the method further includes: d. stopping the first driving device from driving the main shaft to rotate, closing the clutch, and causing the second driving device to decelerate the main shaft .

In an embodiment of the present invention, after step c, it further includes: e. stopping the first driving device from driving the main shaft to rotate, closing the clutch, the second driving device driving the main shaft to rotate, and The rotation angle of the second driving device is controlled so that the carriage is at the initial position when it is stationary.

Compared with the prior art, the present invention has the following advantages:

The drying device of the present invention has a first driving device and a second driving device. In the acceleration stage, the two driving devices can drive the main shaft to rotate at the same time, so that the main shaft can quickly reach the first rotation speed. In the drying stage, only the first driving device is used. The driving device drives the main shaft to rotate, and in the deceleration stage, the second driving device can decelerate the main shaft, which speeds up the deceleration of the main shaft, and can control the rotation angle of the second driving device, so that the main shaft can return to the initial position, which is convenient at this time. The workpiece can be put in or taken out.

Description of drawings

FIG. 1 is a three-dimensional perspective view of a drying device according to an embodiment of the present invention.

FIG. 2 is a three-dimensional perspective view of a drying component of a drying device according to an embodiment of the present invention.

FIG. 3 is a top view of a drying component of a drying device according to an embodiment of the present invention.

4 is a three-dimensional perspective view of a first driving device according to an embodiment of the present invention.

5 is a three-dimensional perspective view of a second driving device according to an embodiment of the present invention.

FIG. 6 is a schematic diagram of a state when the clutch is disengaged according to an embodiment of the present invention.

FIG. 7 is a three-dimensional perspective view of an angle sensing device according to an embodiment of the present invention.

8 is a schematic diagram showing the relationship between the rotational speed of the main shaft and the time when the drying apparatus according to an embodiment of the present invention dries the workpiece.

FIG. 9 is a basic flowchart of a control method of a drying device according to an embodiment of the present invention.

Detailed ways

In order to make the above objects, features and advantages of the present invention more clearly understood, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Numerous specific details are set forth in the following description to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways than those described herein, and thus the present invention is not limited by the specific embodiments disclosed below.

As shown in this application and in the claims, unless the context clearly dictates otherwise, the words "a", "an", "an" and/or "the" are not intended to be specific in the singular and may include the plural. Generally speaking, the terms "comprising" and "comprising" only imply that the clearly identified steps and elements are included, and these steps and elements do not constitute an exclusive list, and the method or apparatus may also include other steps or elements.

In this application, relative terms such as "below", "upper", "horizontal", "vertical", "below", "above", "top", "bottom" and the like should be understood as the The orientations depicted in the segments and related figures. This relative term is for convenience of description only, and does not imply that the device described needs to be manufactured or operated in a particular orientation. The terms of joining and connecting, such as "connection", "interconnection", etc., unless otherwise defined, may mean that the two structures are in direct contact, or may also mean that the two structures are not in direct contact, and other structures are provided here. between the two structures. And the terms of joining and connecting can also include the case where both structures are movable, or both structures are fixed.

FIG. 1 is a three-dimensional perspective view of a drying device according to an embodiment of the present invention. FIG. 2 is a three-dimensional perspective view of a drying component of a drying device according to an embodiment of the present invention. Referring to FIG. 1 and FIG. 2 , the drying apparatus 1 may include a casing assembly 10 and a drying component 20 disposed in the casing assembly 10 .

The housing assembly 10 is mainly composed of a bracket and a housing, and its shape can be as shown in FIG. 1 , the main part is a quadrangular prism, and the top is a triangular prism. It can be understood that the housing assembly 10 may also have other shapes, such as a quadrangular prism shape, a barrel shape as a whole, etc., which is not limited in the present invention. A door 11 is provided on one side of the housing assembly 10 . The door 11 can be opened and closed by turning around one of its edges. When the workpiece needs to be put in or taken out, the door 11 can be opened to carry out the operation of putting in and taking out the workpiece. When the workpiece is being spun dry, the door 11 is closed to prevent the liquid resin from splashing out. A switch 12 may also be provided on the housing assembly 10 for controlling the start and stop of the drying part 20 . In another embodiment, the switch 12 may also have multiple gears, and each gear corresponds to a rotation speed of the drying member 20 , so as to realize the adjustment of the rotation speed of the drying member 20 in multiple gears.

FIG. 3 is a top view of a drying component of a drying device according to an embodiment of the present invention. Please refer to FIG. 2 and FIG. 3 , the drying component 20 mainly includes a main shaft 21 , a bracket 22 , a first driving device 23 and a second driving device 25 .

Please refer to FIG. 1 and FIG. 2 in combination, the main shaft 21 is erected on two opposite sides of the housing assembly 10 to provide a rotating shaft for the bracket 22 . In the embodiment shown in FIG. 1 , the main shaft 21 spans the front side (the side where the door 11 is located) and the rear side of the housing assembly 10 , and is located above the door 11 .

Please continue to refer to FIG. 2 and FIG. 3 , the bracket 22 is fixedly connected with the main shaft 21 , and the bracket 22 is mainly used to carry the workpiece, so that when the first driving device 23 and/or the second driving device 25 drives the main shaft 21 to rotate, the bracket 22 is 22 rotates with the main shaft 21 to remove the liquid resin attached to the workpiece under the action of centrifugal force. The bracket 22 includes a transverse arm 22a and a longitudinal arm 22b. The transverse arm 22a and the longitudinal arm 22b are connected in a T-shape. The transverse arm 22a has an accommodation space 22a1 for accommodating the tray 100. Among them, the tray 100 is used to hold the printed three-dimensional workpiece. Preferably, the transverse arm 22a is made of a hollow metal plate, so as to facilitate the discharge of the liquid resin during drying. In a preferred embodiment, a fixing member 22a2 for fixing the workpiece can also be provided in the accommodating space 22a1 of the transverse arm 22a, so as to avoid the workpiece in the pallet 2 from shaking, moving, Damage caused by collision and friction between workpieces caused by falling, etc. In one embodiment, when the drying member 20 is at rest, the opening of the accommodating space 22a1 of the transverse arm 22a is facing the door 11, so as to facilitate the convenient loading and unloading of workpieces. As shown in FIG. 2 , the end of the trailing arm 22b connected to the transverse arm 22a can be divided into two branches, and the end away from the transverse arm 22a is integrated, that is, the trailing arm 22b has a shape similar to "Y". In a preferred embodiment, the main shaft 21 can be set at the weight balance position of the bracket 22, at this time, the weight of the bracket 22 on both sides of the main shaft 21 is equal or approximately equal, so that the bracket 22 can be kept balanced when rotating, Avoid unnecessary vibration. More preferably, the main shaft 21 can be arranged in a horizontal direction, and at this time, the bracket 22 is rotated in a vertical direction.

4 is a three-dimensional perspective view of a first driving device according to an embodiment of the present invention. Please refer to FIG. 2 to FIG. 4 , the first driving device 23 is connected with the main shaft 21 through the transmission member 24 , so as to transmit the rotation of the first driving device 23 to the main shaft 21 . The first driving device 23 may be an electric motor, an air motor, an internal combustion engine, an external combustion engine, or the like. The first drive 23 preferably has a maximum rotational speed of 650 rpm. In one embodiment, the first driving device 23 may be fixed to the rear side (the side opposite to the door 11 ) of the housing assembly 10 . In the embodiments shown in FIGS. 2 to 4 , the transmission member 24 is a belt, but it is understood that the transmission member 24 may also be a gear set, a chain, etc., which is not limited in the present invention.

5 is a three-dimensional perspective view of a second driving device according to an embodiment of the present invention. FIG. 6 is a schematic diagram of a state when the clutch is disengaged according to an embodiment of the present invention. Please refer to FIG. 2 , FIG. 3 , FIG. 5 and FIG. 6 , the second driving device 25 is connected with the main shaft 21 through the clutch 26 . When the clutch 26 is closed (as shown in FIG. 5 ), the second driving device 25 can drive the main shaft 21 Rotation, when the clutch 26 is disengaged (as shown in FIG. 6 ), the rotation of the second driver 25 cannot be transmitted to the main shaft 21 . Compared with the first driving device 23, the second driving device 25 has a lower rotational speed, but its rotational speed and rotation angle are controllable. Specifically, the maximum rotational speed of the first driving device 23 may be greater than the maximum rotational speed of the second driving device 25 . The second driving device 25 can also be an electric motor, an air motor, an internal combustion engine, an external combustion engine, etc. Preferably, the second driving device 25 is a stepping motor. In one embodiment, the second driving device 25 may be fixed to the rear side (the side opposite to the door 11 ) of the housing assembly 10 . The clutch 26 may preferably be an electromagnetic clutch.

FIG. 7 is a three-dimensional perspective view of an angle sensing device according to an embodiment of the present invention. Please refer to FIG. 2 , FIG. 6 and FIG. 7 , the drying component 20 may further include an angle sensing device 27 for sensing the angle of the main shaft 21 . The angle sensing device 27 may include a photoelectric switch 27a and a positioning disc 27b. The positioning plate 27b is fixed to the main shaft 21 and rotates synchronously with the main shaft 21 . The positioning plate 27b is provided with one or more light-passing areas 27b1 and one or more light-blocking areas 27b2 on a circumference. The photoelectric switch 27a is disposed adjacent to the circumference where the light-passing area 27b1 and the light-blocking area 27b2 are located, and is used for switching the switch according to the switching of the light-passing area 27b1 and the light-blocking area 27b2. Specifically, the photoelectric switch 27a has opposite ends, one of which is provided with a light-emitting component, and the other end is provided with a photosensitive component. When the light-transmitting area 27b1 is located between the two ends, the photosensitive component can receive the light emitted by the light-emitting component. At this time, the switch is in the on state, when the light blocking area 27b2 is located between the two ends, the photosensitive component cannot receive the light emitted by the light emitting component, and the switch is in the off state at this time. The angle sensing device 27 can determine the angle of the main shaft 21 through a signal generated by switching the photoelectric switch 27a on and off. In the embodiment shown in FIG. 7 , there is only one slit (light-transmitting area 27b1 ) on the positioning plate 27b, and the photoelectric switch 27a will be in an open state every time the main shaft 21 rotates once. The rotation speed of the main shaft 21 can be calculated by the interval time between the states, and then the angle of the main shaft 21 can be calculated according to the rotation speed and the rotation time of the main shaft 21 . In some embodiments, the light passing area 27b1 can be encoded on the positioning plate 27b, and the angle of the main shaft 21 can be obtained through the corresponding encoded signal generated by the photoelectric switch 27a.

8 is a schematic diagram showing the relationship between the rotational speed of the main shaft and time when the drying apparatus according to an embodiment of the present invention dries the workpiece, wherein the horizontal axis is time t, and the vertical axis is rotational speed rpm. Please refer to FIG. 8 , when the drying device 1 spins the workpiece, it mainly includes an acceleration stage t1 , a drying stage t2 and a deceleration stage t3 .

In the acceleration phase t1, the main shaft 21 is driven from standstill (zero speed) to the first speed r1. In a preferred embodiment, when the main shaft 21 is at rest, the main shaft 21 is located at an initial position. into the workpiece. In another embodiment, the initial position of the main shaft 21 may be a position in which the transverse arm 22a of the bracket 22 is in a horizontal position. In one embodiment, in the acceleration phase t1, the main shaft 21 may be driven to rotate by the first driving device 23 alone. In a preferred embodiment, at least a part of the time in the acceleration phase t1, the first driving device 23 and the second driving device 25 can jointly drive the main shaft 21 to rotate, so that the main shaft 21 can reach the first rotational speed r1 faster. . Specifically, the clutch 26 may be closed to enable the second driving device 25 to drive the main shaft 21 in the interval from the rotation speed of the main shaft 21 to the maximum rotation speed of the second driving device 25 .

In the drying stage t2, the clutch 26 disconnects the connection between the second driving device 25 and the main shaft 21, so that the first driving device 23 alone drives the main shaft 21 to rotate at the first rotational speed r1.

In the deceleration stage t3 , the first driving device 23 stops driving the main shaft 21 to decelerate the rotational speed of the main shaft 21 from the first rotational speed r1 to zero. In one embodiment, in the deceleration phase t3, the clutch 26 is closed, so that the second drive device 25 decelerates the main shaft 21. Specifically, when the rotational speed of the main shaft 21 is greater than the maximum rotational speed of the second driving device 25, the clutch 26 is closed, and the low rotational speed of the second driving device 25 and/or the natural damping of the motor can be used to decelerate the main shaft 21; when the main shaft 21 When the speed of the second driving device 25 is lower than the maximum speed of the second driving device 25, the clutch 26 is closed, the second driving device 25 can be used to drive the main shaft 21 to rotate, and the speed of the second driving device 25 is gradually reduced to decelerate the main shaft 21. In another preferred embodiment, in the deceleration stage t3, the clutch 26 is closed, the second driving device 25 drives the main shaft 21 to rotate, and the rotation angle of the second driving device 25 is controlled, so that the main shaft 21 returns to the initial state when it is stationary Location. The initial position may be, for example, the position where the opening of the accommodating space 22a1 of the bracket 22 faces the door 11 when the bracket 22 is at rest, so as to facilitate the convenient removal of the workpiece. The initial position may also be that the initial position of the main shaft 21 may be a position in which the transverse arm 22a of the bracket 22 is horizontal. It can be understood that the angle of the main shaft 21 can be sensed by the angle sensing device 27, and the angle between the angle of the main shaft 21 and the initial position can be calculated accordingly, and then it can be calculated that in order to return the main shaft 21 to the initial position, the second The angle by which the drive device 25 needs to be rotated.

It can be understood that the drying device 1 can be combined with a washing machine, a drying machine, an ultraviolet light curing machine, etc. to form an assembly line device, so as to perform an assembly line post-processing on the workpiece. Further, the workpiece insertion/removal ports of these devices can be set at the same height, and a robotic arm or the like can be used to perform the workpiece insertion/removal operation, realizing a fully automated assembly line.

FIG. 9 is a basic flowchart of a control method of a drying device according to an embodiment of the present invention. Referring to FIG. 9, the control method 30 may include:

Step 31: closing the clutch, so that the first driving device and the second driving device jointly drive the main shaft to rotate;

Step 32: when the rotational speed of the main shaft is equal to the first rotational speed or greater than the maximum rotational speed of the second driving device, disconnect the clutch and stop the driving of the main shaft by the second driving device;

Step 33: The first driving device continues to drive the main shaft to rotate, so that the main shaft rotates at the first rotational speed.

The control method 30 can be used to control the spin drying device 1 as described above.

In step 31 , the clutch 26 may be closed while the main shaft 21 is stationary, or the clutch 26 may be closed while the main shaft 21 is rotating. Preferably, when the clutch 26 is closed, the second drive device 25 has a rotational speed that matches that of the main shaft 21 .

In step 32 , the rotational speed of the main shaft 21 can be obtained by the angle sensing device 27 .

In step 33, when the main shaft 21 rotates at the first rotational speed r1, the first drive device 23 is preferably at the rated rotational speed.

In some embodiments, the control method 30 may further include:

Step 34: stop the first driving device from driving the main shaft to rotate, close the clutch, and make the second driving device decelerate the main shaft;

Step 35: The second driving device drives the main shaft to rotate, and controls the rotation angle of the second driving device, so that the bracket is at the initial position when it is stationary.

In step 34 , the clutch 26 may be closed when the rotational speed of the main shaft 21 is greater than the rotational speed of the second driving device 25 to decelerate the main shaft 21 with the low rotational speed of the second driving device 25 .

In step 35, the angle of the main shaft 21 can be obtained through the angle sensing device 27, and according to the positional relationship between the angle of the main shaft 21 and the initial angle, the rotation angle required to return the main shaft 21 to the initial position can be calculated, and then the The second driving device 25 drives the main shaft 21 to return to the initial position by the required rotation angle.

Although the present invention has been described with reference to the present specific embodiments, those of ordinary skill in the art will recognize that the above embodiments are only used to illustrate the present invention, and can be made without departing from the spirit of the present invention Various equivalent changes or substitutions, therefore, as long as the changes and modifications to the above-mentioned embodiments within the spirit and scope of the present invention will fall within the scope of the claims of the present application.

Claims (10)

1. A drying device suitable for removing liquid resin attached to a three-dimensional printing workpiece, comprising: a main shaft; a bracket, fixedly connected with the main shaft, for carrying the workpiece to rotate around the main shaft; a first driving device for driving the main shaft to rotate through a transmission member; and a second driving device connected to the main shaft through a clutch; Wherein, the maximum rotation speed of the first driving device is greater than the maximum rotation speed of the second driving device, the second driving device is a stepping motor, and the rotation speed and the rotation angle of the second driving device are controllable; When the drying device spins the workpiece, it includes an acceleration stage in which the main shaft rotates from a stationary state to a first rotation speed and a drying stage in which the main shaft rotates at the first rotation speed. In the acceleration stage At least a part of the first driving device and the second driving device jointly drive the main shaft to rotate; When the drying device spins the workpiece, it includes a drying stage in which the main shaft rotates at a first rotational speed and a deceleration stage in which the main shaft rotates from the first rotational speed to a stationary state, and the bracket has In an initial position, in the deceleration stage, the second driving device drives the main shaft to rotate through the clutch, and controls the rotation angle of the second driving device, so that the bracket is at rest in the initial position. 2. The drying device according to claim 1, characterized in that, when the drying device spins the workpiece, it comprises a drying stage in which the main shaft rotates at a first rotational speed and the main shaft rotates from The first rotational speed rotates to a stationary deceleration stage during which the second drive device decelerates the main shaft through the clutch. 3. The drying device according to any one of claims 1 to 2, characterized in that, in the drying stage, the clutch disconnects the second driving device from the main shaft, so The first driving device drives the main shaft to rotate at the first rotational speed. 4. The drying device according to claim 1, wherein the bracket comprises a transverse arm and a longitudinal arm, the transverse arm and the longitudinal arm are connected in a T-shape, and the transverse arm is on the There is an accommodating space for accommodating a pallet, the pallet is used for accommodating the workpiece, and the trailing arm is also fixedly connected with the main shaft. 5. The drying device according to claim 1, wherein the bracket comprises a transverse arm and a longitudinal arm, the transverse arm and the longitudinal arm are connected in a T-shape, and the transverse arm is There is an accommodating space for accommodating a pallet, where the pallet is used for accommodating the workpiece, the longitudinal arm is also fixedly connected with the main shaft, and the initial position is the horizontal position of the transverse arm. 6 . The drying device according to claim 1 , further comprising an angle sensing device for sensing the angle of the main shaft. 7 . 7 . The drying device according to claim 6 , wherein the angle sensing device comprises a positioning disc and a photoelectric switch, the positioning disc rotates synchronously with the main shaft, and the positioning disc is arranged on a circumference. 8 . There are one or more light-passing regions and one or more light-blocking regions, and the photoelectric switch is arranged adjacent to the circumference for switching according to the switching of the light-passing regions and the light-blocking regions. 8. The drying device according to claim 1, wherein the transmission component is a belt or a gear set. 9. The drying device according to claim 1, wherein the clutch is an electromagnetic clutch. 10. A control method of a spin-drying device, suitable for controlling the spinning-drying device as claimed in any one of claims 1 to 9, comprising: a. Closing the clutch, so that the first driving device and the second driving device jointly drive the main shaft to rotate; b. When the rotational speed of the main shaft is equal to the first rotational speed or greater than the maximum rotational speed of the second driving device, disconnect the clutch and stop the driving of the main shaft by the second driving device; c. causing the first driving device to continue to drive the main shaft to rotate, so that the main shaft rotates at the first rotational speed; and d. Stop the first driving device from driving the main shaft to rotate, close the clutch, the second driving device drives the main shaft to rotate, and controls the rotation angle of the second driving device, so that all the The bracket is in the initial position at rest.

Images