Automatic opening and closing structure and dry type smoothing machine using same

Abstract

The utility model relates to the technical field of smoothing machine equipment, and discloses an automatic opening and closing structure and a dry type smoothing machine using the automatic opening and closing structure, the automatic opening and closing structure comprises a barrel body, an upper cover, an upper cover driving assembly, a lock catch driving assembly, a first rotating shaft, a connecting rod, a plurality of lock catches, a transmission piece, a first shifting block and a second shifting block; through cooperation of the upper cover driving assembly and the lock catch driving assembly, automatic opening, closing and locking of the upper cover and the lock catches in the dry-type smoothing machine are achieved, through arrangement of the connecting rods, the lock catches of the same barrel body can be opened and closed at the same time, the opening and closing efficiency is improved, and the problems that time and labor are consumed when the lock catches are manually opened and closed one by one are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a light machine equipment technical field especially relates to a kind of automatic opening and closing structure and dry light machine using it. BACKGROUND

[0002] In traditional dry light machine, the opening and closing of glue barrel usually rely on manual operation. Each time needs to be opened and closed manually, and a certain degree of force needs to be exerted when operating, which is clumsy and inefficient, affecting overall efficiency.

[0003] In addition, the dry light machine is usually equipped with multiple barrels, and multiple locks are provided on each barrel to ensure locking effect. Before each use, the operator needs to manually open these locks one by one, which is a heavy workload. And because the barrel size is large, manual locking of the upper cover is time-consuming and laborious, increasing the complexity and labor intensity of operation.

[0004] In summary, the traditional dry light machine has obvious shortcomings in the opening and closing and locking operation of the glue barrel, and needs to be improved to improve work efficiency and reduce the labor intensity of the operator. INVENTION CONTENTS

[0005] To overcome the above-mentioned defects, the utility model aims to provide an automatic opening and closing structure and dry light machine, which realizes the automatic opening and closing of the barrel cover through full-automatic mechanical control, thereby improving overall efficiency.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] An automatic opening and closing structure, comprising a barrel, an upper cover, an upper cover driving assembly, a lock driving assembly, a first rotating shaft, a connecting rod, a plurality of locks, a transmission member, a first toggle block and a second toggle block;

[0008] The upper cover is rotatably connected to the barrel, and the upper cover is connected to the second toggle block.

[0009] The first rotating shaft and the connecting rod are respectively installed on the outer wall of the barrel in parallel with each other, and the transmission member is provided between the first rotating shaft and the connecting rod. The first toggle block is installed on the transmission member, and a plurality of locks are arranged on the connecting rod in the length direction of the connecting rod. The lock is used to lock the barrel and the upper cover. The movement of the first toggle block drives the transmission member, the connecting rod and the locks thereon to rotate as a whole around the first rotating shaft.

[0010] The lock driving assembly is used to drive the first knob to reciprocate between the loosening direction and the locking direction, and drive the lock to loosen or lock the barrel and the upper cover through the first knob. The upper cover driving assembly is used to drive the second knob to reciprocate between the opening direction and the closing direction, and drive the upper cover to open and close through the second knob.

[0011] Preferably, the second rotating shaft is parallel to the first rotating shaft.

[0012] The barrel is provided with a plurality of barrels, and the plurality of barrels are rotationally symmetrically arranged about the second rotating shaft. The barrel is connected to the second rotating shaft through the second rotating member. The second rotating shaft is used to drive the second rotating member and the barrel thereon to rotate around the second rotating shaft. The barrel has an opening and closing position in the rotation track.

[0013] The upper cover driving assembly and the lock driving assembly are located on one side of the opening and closing position.

[0014] Preferably, the third driver and the first fixed plate are further included. The first fixed plate is connected to the output of the third driver. The first fixed plate is installed with the upper cover driving assembly and the lock driving assembly. The third driver is used to drive the first fixed plate to reciprocate in a straight line direction. The reciprocation of the first fixed plate drives the upper cover driving assembly and the lock driving assembly thereon to move away from or close to the barrel.

[0015] Preferably, the lock driving assembly includes a first driver and a first driving block. The first driving block is connected to the output of the first driver. The first driving block is provided with a pushing part and a buckling part. The pushing part and the buckling part are oppositely arranged.

[0016] When any barrel is located at the opening and closing position, the first knob on the barrel is located between the pushing part and the buckling part.

[0017] Preferably, the lock driving assembly further includes a fourth driver. The first driving block is connected to the first driver through the fourth driver. The driving direction of the fourth driver is the same as that of the first driver. The stroke of the fourth driver is smaller than that of the first driver, and smaller than the distance between the pushing part and the buckling part.

[0018] Preferably, the distance between the first knob and the first rotating shaft is defined as the first distance D. The distance between the connecting position of the lock when locked and the first rotating shaft is defined as the second distance L. The first distance D is 1-2 times the second distance L.

[0019] Preferably, the first fixed plate is provided with a first guide rail and a second guide rail, the driving end of the upper cover driving assembly slides along the first guide rail, and the driving end of the lock driving assembly slides along the second guide rail.

[0020] Preferably, the upper cover driving assembly and the lock driving assembly are both telescopic cylinder driving assemblies.

[0021] An automatic opening and closing dry type light polishing machine, comprising a first motor, a second motor, a main rotating shaft, a first rotating part, a fixed support and the automatic opening and closing structure, the fixed support is used for fixedly installed with an external fixing mechanism, the main rotating shaft is rotatably connected with the fixed support, the first rotating part is connected with the main rotating shaft and the second rotating shaft, and the first rotating part and the second rotating shaft can rotate around the main rotating shaft along with the main rotating shaft, the first motor is used for driving the main rotating shaft to rotate, and the second motor is used for driving the second rotating shaft to rotate in a planetary rotation mode.

[0022] The technical scheme provided by the utility model can have the following beneficial effects:

[0023] 1. By using the upper cover driving assembly and the lock driving assembly, the automatic opening and closing and locking of the upper cover and the lock in the dry type light polishing machine are realized, and by using the connecting rod, the several locks of the same barrel body can be simultaneously opened and closed, the opening and closing efficiency is increased, and the problems of time-consuming and labor-consuming in manually opening and closing the locks one by one are solved.

[0024] 2. By using the third driver, when the barrel body moves, the first fixed plate is located away from the barrel body, when the opening and closing action is performed, the third driver drives the first fixed plate to be close to the barrel body, the automatic opening and closing structure performs the opening and closing action, after the opening and closing action is completed, the third driver drives the first fixed plate to be away from the barrel body again, and the rotation of the barrel body is prevented from being hindered by the upper cover driving assembly and the lock driving assembly.

[0025] 3. The first driving block is pressed by the buckling part, and the lock is locked in place.

[0026] 4. By using the fourth driver, the first driving block is located in the middle of the pushing part and the buckling part, and the movement of the barrel body or the first fixed plate is prevented from being affected.

[0027] 5. The first driving block, the lock and the first rotating shaft form a lever structure, by setting a suitable distance ratio, the problem that the locking force required by the first driver is too large when the distance ratio is too small, and the problem that the stroke required by the first driver is too long when the distance ratio is too large are avoided.

[0028] 6. The first guide rail is used for guiding the movement of the driving end of the upper cover driving assembly, and the second guide rail is used for guiding the movement of the driving end of the lock driving assembly, so that when the driving distance is long and the driving force is large, the problem that the driving end deviates from the predetermined direction and causes an accident is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is a three-dimensional schematic view of the automatic opening and closing structure of an embodiment of the utility model.

[0030] Figure 2 It is a structure schematic view of the upper cover driving assembly, the lock catch driving assembly, the third driver and the first fixed plate of an embodiment of the utility model. Figure 1 It is an enlarged view of A in the middle.

[0039] Figure 3 It is a structure schematic view of the upper cover driving assembly, the lock catch driving assembly, the third driver and the first fixed plate of an embodiment of the utility model.

[0032] Figure 4 It is a connection schematic view of the first rotating shaft, the connecting rod, the lock catch, the transmission member and the first poking block of an embodiment of the utility model.

[0033] Figure 5 It is a three-dimensional schematic view of the dry type light polishing machine of an embodiment of the utility model.

[0034] Wherein: the barrel body 1, the upper cover 2, the upper cover driving assembly 302, the lock catch driving assembly 301, the upper cover driving assembly 302, the first driver 31, the second driver 32, the third driver 33, the fourth driver 34, the first driving block 41, the pushing part 411, the buckling part 412, the second driving block 42, the first poking block 51, the second poking block 52, the first rotating shaft 61, the connecting rod 62, the lock catch 63, the transmission member 64, the second rotating shaft 71, the second rotating member 72, the first fixed plate 8, the second motor 91, the main rotating shaft 92, the first rotating member 93, the fixed support 94, the first distance D, the second distance L. DETAILED DESCRIPTION

[0035] The embodiments of the utility model are described in detail below, and the examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the utility model, and cannot be understood as limiting the utility model.

[0036] In the description of the utility model, it is understood that the terms "longitudinal", "transverse"

[0037] The orientation or positional relationship indicated by "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings and is merely for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the features defined as "first" and "second" can explicitly or implicitly include one or more of the features, which are used to distinguish the features described, and have no order or importance.

[0038] In the description of the present application, unless otherwise specified, "a plurality of" means two or more.

[0039] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0040] The embodiments of the present application will be described below with reference to the drawings.

[0041] An automatic opening and closing structure, comprising a barrel body 1, an upper cover 2, an upper cover driving assembly 302, a lock catch driving assembly 301, a first rotating shaft 61, a connecting rod 62, a plurality of lock catches 63, a transmission member 64, a first push block 51 and a second push block 52;

[0042] The upper cover 2 is rotatably connected to the barrel body 1, and the upper cover 2 is connected to the second push block 52;

[0043] The first rotating shaft 61 and the connecting rod 62 are respectively installed on the outer wall of the barrel body 1 in parallel with each other, the transmission member 64 is arranged between the first rotating shaft 61 and the connecting rod 62, the first push block 51 is installed on the transmission member 64, a plurality of lock catches 63 are arranged on the connecting rod 62 in the length direction of the connecting rod 62, and the lock catches 63 are used for locking the barrel body 1 and the upper cover 2; the movement of the first push block 51 drives the transmission member 64, the connecting rod 62 and the lock catches 63 thereon to rotate as a whole around the first rotating shaft 61;

[0044] The lock driving assembly 301 is used to drive the first toggle block 51 to reciprocate between the loosening direction and the locking direction, and through the first toggle block 51, the lock 63 is driven to loosen or lock the barrel body 1 and the upper cover 2. The upper cover driving assembly 302 is used to drive the second toggle block 52 to reciprocate between the opening direction and the closing direction, and through the second toggle block 52, the upper cover 2 is driven to open and close.

[0045] With this structure, through the cooperation of the upper cover driving assembly 302 and the lock driving assembly 301, the automatic opening and closing and locking of the upper cover 2 and the lock 63 in the dry polishing machine are realized, and through the setting of the connecting rod 62, several locks 63 of the same barrel body 1 can be opened and closed at the same time, the opening and closing efficiency is increased, and the problem of time-consuming and laborious manual one-by-one opening and closing of the lock 63 is solved.

[0046] As Figure 1 , Figure 2 and Figure 3In a specific embodiment, the lock driving assembly 301 comprises a first driver 31 and a first driving block 41, the upper cover driving assembly 302 comprises a second driver 32 and a second driving block 42, the first driving block 41 is connected to the output of the first driver 31, the second driving block 42 is connected to the output of the second driver 32, the first driver 31 is used to drive the first driving block 41 to move reciprocally, the movement of the first driving block 41 is used to move the first moving block 51, the second driver 32 is used to drive the second driving block 42 to move reciprocally, the movement of the second driving block 42 is used to move the second moving block 52, the first driver 31 and the second driver 32 are fixed to the support of the dry-type light machine, the driving direction of the first driver 31 and the second driver 32 is vertical direction, the first driving block 41 is arranged above the output of the first driver 31, the second driving block 32 is arranged above the output of the second driver 32. When the dry-type light machine needs to open the upper cover 2, the barrel 1 is positioned and moved to the opening and closing position, the first driver 31 drives the first driving block 41 to move upward and drives the first moving block 51 to move, the first moving block 51 drives the connecting rod 62 and the lock 63 thereon to rotate around the first rotating shaft 61, the lock 63 moves away from the upper cover 2, then the second driver 32 drives the second driving block 42 to move upward and drives the second moving block 52 to move, the movement of the second moving block 52 drives the upper cover 2 to rotate and open, realizing the function of automatic unlocking and opening of the upper cover 2; then when the dry-type light machine needs to close the upper cover 2, the second driver 32 drives the second moving block 52 to move downward, the second moving block 52 and the upper cover 2 rotate and close under the action of gravity, then the first driver 31 drives the first driving block 41 to move downward, the first moving block 51 drives the transmission member 64, the connecting rod 62 and the lock 63 thereon to rotate around the first rotating shaft 61, the lock 63 locks the upper cover 2 and the barrel 1, realizing the function of automatic closing and locking of the upper cover 2.

[0047] Preferably, it further comprises a second rotating shaft 71 and a second rotating member 72, the second rotating shaft 71 is arranged in parallel with the first rotating shaft 61.

[0048] The barrel 1 is arranged in plurality, the plurality of barrels 1 are arranged rotationally symmetrically about the second rotating shaft 71, the barrel 1 is connected to the second rotating shaft 71 through the second rotating member 72, the second rotating shaft 71 is used to drive the second rotating member and the barrel 1 thereon to rotate around the second rotating shaft 71, the barrel 1 is arranged in the opening and closing position in the rotating track.

[0049] The upper cover driving assembly 302 and the lock driving assembly 301 are located on one side of the opening and closing position.

[0050] In specific embodiments, the inner cavity of the barrel body 1 is used to carry workpieces and polishing materials, and a plurality of barrel bodies 1 rotate around the second rotating shaft 71 to achieve dry polishing. When the barrel body 1 rotates to the opening and closing position, the operator controls the automatic opening and closing mechanism through the button, and the automatic opening and closing mechanism performs automatic opening and closing actions.

[0051] Preferably, the third driver 33 and the first fixed plate 8 are further included, the output of the third driver 33 is connected to the first fixed plate 8, the first fixed plate 8 is installed with the upper cover driving assembly 302 and the lock driving assembly 301, and the third driver 33 is used to drive the first fixed plate 8 to move back and forth in a straight line direction, and the movement of the first fixed plate 8 drives the upper cover driving assembly 302 and the lock driving assembly 301 on it to move away from or close to the barrel body 1.

[0052] With this structure, when the barrel body 1 moves, the first fixed plate 8 is located away from the barrel body 1, when the opening and closing action is performed, the third driver 33 drives the first fixed plate 8 to close to the barrel body 1, the automatic opening and closing structure performs the opening and closing action, and after the opening and closing action is completed, the third driver 33 drives the first fixed plate 8 away from the barrel body 1 again, so as to avoid that the upper cover driving assembly 302 and the lock driving assembly 301 hinder the rotation of the barrel body 1.

[0053] Preferably, the lock driving assembly 301 includes the first driver 31 and the first driving block 41, the output of the first driver 31 is connected to the first driving block 41, the first driving block 41 is provided with a pushing part 411 and a buckling part 412, and the pushing part 411 and the buckling part 412 are oppositely arranged.

[0054] When any of the barrel bodies 1 is located at the opening and closing position, the first driving block 51 on the barrel body 1 is located between the pushing part 411 and the buckling part 412.

[0055] In specific embodiments, the driving direction of the first driver 31 is arranged in a vertical direction, when any of the barrel bodies 1 is located at the opening and closing position, the pushing part 411 is located below the first driving block 51 of the barrel body 1, and the buckling part 412 is located above the first driving block 51 of the barrel body 1. When the automatic opening and closing structure performs the opening action, the first driver 31 drives the first driving block 41 to move upward, the pushing part 411 pushes the first driving block 51 upward, and the first driving block 51 drives the lock 63 to loosen the upper cover 2 and the barrel body 1; when the automatic opening and closing structure performs the closing action, the first driver 31 drives the first driving block 41 to move downward, the buckling part 412 presses the first driving block 51 downward, and the first driving block 51 drives the lock 63 to lock the upper cover 2 and the barrel body 1.

[0056] With this structure, the first driving block 51 is pressed by the buckling part 412, so as to ensure that the lock 63 is locked in place.

[0057] Preferably, the latch drive assembly 301 further includes a fourth driver 34, the first drive block 41 is connected to the first driver 31 through the fourth driver 34, the driving direction of the fourth driver 34 is the same as the driving direction of the first driver 31, the stroke of the fourth driver 34 is less than that of the first driver 31, and less than the distance between the pushing part 411 and the fastening part 412.

[0058] When the latching part 412 locks the latch 63, the latching part 412 is in close contact with the first actuating block 51, which affects the rotation of the barrel 1 away from the open / closed position and also affects the movement of the first fixing plate 8 driven by the third actuator 33. By adding a fourth actuator 34, after the latch 63 locks the top cover 2 and the barrel 1, the fourth actuator 34 drives the first driving block 41 to move slightly upward again, so that the first actuating block 51 is located in the middle of the pushing part 411 and the latching part 412, thus avoiding affecting the movement of the barrel 1 or the first fixing plate 8.

[0059] Preferably, the distance between the first actuating block 51 and the first rotating shaft 61 is defined as the first distance D, and the distance between the connection point of the latch 63 and the upper cover 2 and the first rotating shaft 61 when the latch is locked is defined as the second distance L. The first distance D is 1 to 2 times the second distance L.

[0060] like Figure 4 As shown, a lever structure is formed between the first actuating block 51, the latch 63 and the first rotating shaft 61. By setting an appropriate distance ratio, the problem of excessive locking force required by the first driver 31 when the distance ratio is too small and excessive travel required by the first driver 31 when the distance ratio is too large is avoided.

[0061] Preferably, the first fixing plate 8 is provided with a first guide rail and a second guide rail, the driving end of the upper cover driving assembly 302 slides along the first guide rail, and the driving end of the latch driving assembly 301 slides along the second guide rail.

[0062] The first guide rail guides the movement of the drive end of the top cover drive assembly 302, and the second guide rail guides the movement of the drive end of the latch drive assembly 301, so as to avoid the problem of the drive end deviating from the predetermined direction and causing accidents when the drive distance is long and the drive force is large.

[0063] Preferably, both the upper cover drive assembly 302 and the latch drive assembly 301 are telescopic cylinder drive assemblies.

[0064] Preferably, both the third actuator 33 and the fourth actuator 34 are telescopic cylinders.

[0065] It adopts a telescopic cylinder, which has a fast action speed and a large driving force, enabling rapid opening and closing operations and increasing efficiency.

[0066] An automatically opening and closing dry quenching machine includes a first motor, a second motor 91, a main rotating shaft 92, a first rotating component 93, a fixed bracket 94, and the aforementioned automatic opening and closing structure. The fixed bracket 94 is used for fixed installation with an external fixing mechanism. The main rotating shaft 92 is rotatably connected to the fixed bracket 94. The first rotating component 93 connects the main rotating shaft 92 and the second rotating shaft 91, and the first rotating component 93 and the second rotating shaft 71 can follow the main rotating shaft 92 and rotate around the main rotating shaft 92. The first motor is used to drive the main rotating shaft 92 to rotate, and the second motor 91 is used to drive the second rotating shaft 71 to perform planetary rotation.

[0067] like Figure 5 As shown, in a specific embodiment, the first motor and the second motor 91 are manually controlled to move one of the barrels 1 of the dry polishing machine to the open / closed position. Then, the open button is pressed manually, and the automatic opening / closing mechanism opens the latch 63 and the top cover 2. After the workpiece and polishing abrasive are placed into the barrel 1, the close button is pressed manually, and the automatic opening / closing mechanism closes the top cover 2 and locks the latch 63. Then, the first motor and the second motor 91 are manually controlled to move the next barrel 1 to the open / closed position. This process is repeated until the loading is complete, and the dry polishing machine begins to dry polish the workpiece.

[0068] Other configurations and operations according to the embodiments of this utility model are known to those skilled in the art and will not be described in detail here.

[0069] In this specification, the terms "embodiment," "example," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0070] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An automatic opening and closing structure characterized by comprising: The bucket body, the upper cover, the upper cover driving assembly, the lock catch driving assembly, the first rotating shaft, the connecting rod, the lock catches, the transmission member, the first push block and the second push block are included. The upper cover is rotatably connected to the bucket body, and the upper cover is connected to the second push block. The first rotating shaft and the connecting rod are respectively and parallelly installed on the outer wall of the bucket body, the transmission member is arranged between the first rotating shaft and the connecting rod, the first push block is installed on the transmission member, the lock catches are arranged on the connecting rod along the length direction of the connecting rod, and the lock catches are used for locking the bucket body and the upper cover; the movement of the first push block drives the transmission member, the connecting rod and the lock catches on the connecting rod to rotate around the first rotating shaft. The lock catch driving assembly is used for driving the first push block to reciprocate between the loosening direction and the locking direction, the first push block drives the lock catches to loosen or lock the bucket body and the upper cover, and the upper cover driving assembly is used for driving the second push block to reciprocate between the opening direction and the closing direction, and the second push block drives the upper cover to open and close.

2. An automatic opening and closing structure according to claim 1, characterized in that: The second rotating shaft and the second rotating member are further included, and the second rotating shaft is parallelly arranged with the first rotating shaft. A plurality of the bucket bodies are arranged, the bucket bodies are arranged in rotational symmetry about the second rotating shaft, the bucket bodies are connected to the second rotating shaft through the second rotating member, the second rotating shaft is used for driving the second rotating member and the bucket bodies on the second rotating member to rotate around the second rotating shaft, and an opening and closing position is arranged in the rotating track of the bucket bodies. The upper cover driving assembly and the lock catch driving assembly are located on one side of the opening and closing position.

3. An automatic opening and closing structure according to claim 2, characterized in that: The third driver and the first fixing plate are further included, the first fixing plate is connected to the output part of the third driver, the first fixing plate is installed with the upper cover driving assembly and the lock catch driving assembly, the third driver is used for driving the first fixing plate to reciprocate in a straight line direction, and the reciprocation of the first fixing plate drives the upper cover driving assembly and the lock catch driving assembly on the first fixing plate to move away from or close to the bucket body.

4. An automatic opening and closing structure according to claim 2, characterized in that: The lock catch driving assembly includes the first driver and the first driving block, the first driving block is connected to the output part of the first driver, the first driving block is provided with a pushing part and a buckling part, and the pushing part and the buckling part are arranged opposite to each other. When any of the bucket bodies is located at the opening and closing position, the first push block on the bucket body is located between the pushing part and the buckling part.

5. An automatic opening and closing structure according to claim 4, characterized in that: The lock catch driving assembly further includes the fourth driver, the first driving block is connected to the first driver through the fourth driver, the driving direction of the fourth driver is the same as that of the first driver, the stroke of the fourth driver is smaller than that of the first driver, and is smaller than the distance between the pushing part and the buckling part.

6. An automatic opening and closing structure according to claim 1, characterized in that: The distance between the first push block and the first rotating shaft is defined as a first distance D, and the distance between the connection part of the lock catch when the lock catch is locked and the first rotating shaft is defined as a second distance L, and the first distance D is 1-2 times the second distance L.

7. An automatic opening and closing structure according to claim 3, characterized in that: The first fixed plate is provided with a first guide rail and a second guide rail, a driving end of the upper cover driving assembly slides along the first guide rail, and a driving end of the lock driving assembly slides along the second guide rail.

8. An automatic opening and closing structure according to any one of claims 1 to 7, characterized in that: The upper cover driving assembly and the lock driving assembly are both telescopic cylinder driving assemblies.

9. An automatic opening and closing dry type polishing machine, characterized by: The automatic opening and closing structure comprises a first motor, a second motor, a main rotating shaft, a first rotating part, a fixed support and the automatic opening and closing structure according to any one of claims 1-8, the fixed support is used for fixed installation with an external fixing mechanism, the main rotating shaft is rotatably connected to the fixed support, the first rotating part is connected to the main rotating shaft and the second rotating shaft, and the first rotating part and the second rotating shaft can rotate around the main rotating shaft with the main rotating shaft, the first motor is used for driving the main rotating shaft to rotate, and the second motor is used for driving the second rotating shaft to rotate in a planetary rotation mode.

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