Delivery device compatible with various envelopes

Abstract

The utility model provides a sending device compatible with various envelopes, a transmission mechanism of the sending device comprises a transmission assembly, and the transmission assembly comprises an output end. The pressing mechanism comprises two baffles, the two baffles are located on the two sides of the conveying assembly correspondingly and extend in the conveying direction of the conveying assembly, the two baffles can move close to or away from each other, the moving direction is perpendicular to the conveying direction of the conveying assembly, and the two baffles are used for limiting the envelopes in the horizontal direction so as to limit the width of the envelopes. And the distance between the two baffle plates can be automatically adjusted so as to adapt to envelopes with different widths. The pressing plate mechanism is located at the output end and comprises a guide plate, the guide plate can move up and down in the vertical direction and is used for limiting the envelopes in the vertical direction, and the guide plate can automatically adapt to the envelopes of different heights. The swing arm mechanism is located on the side, away from the output end, of the pressing plate mechanism and comprises a grabbing assembly, and the grabbing assembly is used for extracting the single envelopes close to the output end and sending out the extracted single envelopes.

Description

Technical Field

[0001] The utility model relates to the technical field of envelope sorting, in particular to a sending device compatible with multiple envelopes. Background Art

[0002] With the rapid development of postal services, the way of envelope sorting has been continuously transformed from manual to mechanized sorting, thereby improving sorting efficiency, reducing labor costs and missorting rates. However, the types, materials and sizes of envelopes vary across the country. In the existing technology, the existing envelope sorting equipment has poor compatibility. When facing envelopes of different sizes, people need to manually adjust the structure of the equipment to convert the compatible model of the equipment, such as the position of the baffles on both sides of the envelope and the envelope guide plate. This process requires the use of tools, which is time-consuming and requires human proficiency. Therefore, it is necessary to develop a feeding device that can automatically adjust the position of the baffles on both sides and the envelope guide plate to be compatible with envelopes of different sizes. Utility Model Content

[0003] The utility model provides a sending device which is compatible with a variety of envelopes and can be compatible with envelopes of different sizes.

[0004] The technical solution of the utility model is as follows: the utility model provides a sending device compatible with multiple envelopes, including a transmission mechanism, a pressing mechanism, a pressing plate mechanism and a swing arm mechanism;

[0005] The transmission mechanism includes a transmission component, and the transmission component includes an output end;

[0006] The clamping mechanism includes two baffles, which are respectively located on both sides of the transmission component and extend along the transmission direction of the transmission component. The two baffles can move towards or away from each other, and the movement direction is perpendicular to the transmission direction of the transmission component. The two baffles are used to limit the envelope in the horizontal direction;

[0007] The pressing plate mechanism is located at the output end, and includes a guide plate, and the guide plate can move vertically up and down, and is used to limit the envelope in the vertical direction;

[0008] The swing arm mechanism is located on a side of the pressure plate mechanism that is relatively far from the output end, and includes a grabbing assembly, which is used to extract a single envelope relatively close to the output end and send out the extracted single envelope.

[0009] Furthermore, the transmission component includes a transmission belt and a receiving plate, the receiving plate is connected to the end of the transmission belt closer to the output end, the transmission belt is horizontally arranged, and the receiving plate is tilted downward relative to the end away from the transmission belt.

[0010] Furthermore, the transmission component also includes a roller, a through hole is provided on the receiving plate, the roller is arranged in the through hole and protrudes from the upper surface of the receiving plate, and the axial direction of the roller is perpendicular to the transmission direction of the transmission component.

[0011] Furthermore, the transmission mechanism also includes a transmission motor, a driving wheel, a driven wheel, a roller synchronous belt, a follower synchronous wheel and a roller synchronous wheel. The transmission motor is connected to the driving wheel in a transmission manner. The driving wheel and the driven wheel are respectively connected to the two ends of the transmission belt in the transmission direction. The driving wheel is closer to the output end than the driven wheel. The follower synchronous wheel is connected to the driving wheel. The follower synchronous wheel is connected to the roller synchronous wheel through the roller synchronous belt, and the roller synchronous wheel is connected to the roller.

[0012] Furthermore, the pressure plate mechanism also includes two guide rails, a screw motor and a slide plate. The two guide rails are parallel to each other and vertically arranged. The two baffles are located between the two guide rails. The two ends of the slide plate are respectively slidably connected to the two guide rails. The guide plate is connected to the side of the slide plate facing the transmission component. The screw of the screw motor is connected to the slide plate for driving the slide plate to move up and down, thereby driving the guide plate to move up and down.

[0013] Furthermore, the pressing plate mechanism further comprises an upper pressing block, which is connected to the slide plate and is located on a side of the guide plate that is close to the output end;

[0014] An upper pulley is provided on the side of the upper pressing block facing the transmission component, a gap is set between the upper pulley and the guide plate, and the upper pulley protrudes from the guide plate in the vertical direction close to the transmission component; the upper pulley abuts against the upper edge of the single envelope close to the output end, and when the single envelope close to the output end abuts against the upper pulley, a set gap is provided between the single envelope close to the output end and the guide plate.

[0015] Furthermore, a limit bar is provided at the output end, and the limit bar is provided with a lower pulley; the two baffles are provided with baffles relative to the ends close to the output end, and the two baffles are provided with side pulleys; the limit bar, the two baffles and the upper pressure block form a frame for limiting the envelope.

[0016] Furthermore, the swing arm mechanism further comprises a swing arm motor and a connecting rod assembly, wherein the swing arm motor is connected to the grabbing assembly via the connecting rod assembly to drive the grabbing assembly to rotate;

[0017] The grabbing assembly includes a connecting frame and a suction cup arranged on the connecting frame. The connecting frame is provided with a plurality of connecting holes. The suction cup can be connected to any of the connecting holes so that the suction cup is connected to different positions of the connecting frame.

[0018] Furthermore, the transmission mechanism further comprises an envelope pressing block, wherein the envelope pressing block comprises a first pressing block and a second pressing block vertically connected to each other; the second pressing block is vertically arranged to prevent the envelope from tipping over;

[0019] Guide grooves are respectively arranged on both sides of the transmission belt, and the two guide grooves are both located between the two baffles. The outer surface of the transmission belt protrudes from the two guide grooves. The first pressing block is slidingly connected to the two guide grooves, and the first pressing block is connected to the outer surface of the transmission belt so that the envelope pressing block moves synchronously with the transmission belt.

[0020] Furthermore, the sending device compatible with multiple envelopes also includes an input module, which is electrically connected to the clamping mechanism and the pressure plate mechanism for allowing the user to input envelope specifications, thereby controlling the distance between the two baffles and the upper and lower positions of the guide plate.

[0021] Compared with the prior art, the utility model has the following beneficial effects: since the transmission mechanism includes a transmission component, and the transmission component includes an output end, when the envelope enters the transmission component, it is transported to the output end, thereby realizing the automatic transportation of the envelope. The pressing mechanism includes two baffles, which are respectively located on both sides of the transmission component and extend along the transmission direction of the transmission component. The two baffles limit the width of the envelope, and the two baffles can move toward or away from each other, and the movement direction is perpendicular to the transmission direction of the transmission component. The two baffles are used to limit the envelope in the horizontal direction, and the distance between the two baffles can be automatically adjusted to accommodate envelopes of different widths. The pressing plate mechanism is located at the output end, and includes a guide plate, which can move vertically up and down, and is used to limit the envelope in the vertical direction. For envelopes of different heights, the guide plate can be automatically adjusted to the corresponding height. The swing arm mechanism is located on the side of the pressing plate mechanism that is relatively far from the output end, and includes a grabbing component, which is used to extract a single envelope relative to the output end and send the extracted single envelope out, thereby sorting out the envelopes one by one. In summary, the device can automatically adjust the width limit and height limit of the envelope, so as to be compatible with envelopes of different sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. The drawings described below are only drawings corresponding to some embodiments of the utility model.

[0023] Figure 1A schematic diagram of the structure of a sending device compatible with multiple envelopes provided in a preferred embodiment of the utility model.

[0024] Figure 2 for Figure 1 A schematic diagram of the structure of the transmission mechanism of a sending device that is compatible with multiple envelopes.

[0025] Figure 3 for Figure 1 A schematic structural diagram of another angle of the transmission mechanism of the sending device that is compatible with multiple envelopes.

[0026] Figure 4 for Figure 1 A schematic diagram of the structure of a pressure plate mechanism of a sending device that is compatible with multiple envelopes.

[0027] Figure 5 for Figure 1 A schematic diagram of the structure of a pressure plate mechanism and part of the clamping mechanism of a sending device that is compatible with multiple envelopes.

[0028] Figure 6 for Figure 1 A schematic diagram of the structure of a pressure plate mechanism and a clamping mechanism of a sending device that is compatible with multiple envelopes.

[0029] Figure 7 for Figure 1 A schematic diagram of the structure of the swing arm mechanism of the sending device compatible with multiple envelopes when grabbing letters.

[0030] Figure 8 for Figure 1 A schematic diagram of the structure of the swing arm mechanism of the sending device that is compatible with multiple envelopes when placing letters.

[0031] Among them, 1. transmission mechanism, 2. clamping mechanism, 3. pressing plate mechanism, 4. swing arm mechanism, 5. envelope;

[0032] 11. Transmission assembly, 12. Transmission motor, 13. Driving wheel, 14. Driven wheel, 15. Roller synchronous belt, 16. Follower synchronous wheel, 17. Roller synchronous wheel, 18. Motor synchronous wheel, 19. Motor synchronous belt, 21. Baffle, 22. Clamping motor, 23. Bidirectional screw, 31. Guide plate, 32. Guide rail, 33. Screw motor, 34. Slide plate, 35. Upper pressure block, 36. Upper pulley, 37. Sensor, 41. Grasping assembly, 42. Swing arm motor, 43. Connecting rod assembly;

[0033] 111, output end, 112, transmission belt, 113, receiving plate, 114, roller, 115, limit bar, 116, lower pulley, 117, envelope pressing block, 118, guide groove, 211, stop bar, 212, side pulley, 411, connecting frame, 412, suction cup, 413, connecting hole;

[0034] 1131, through hole, 1171, first pressing block, 1172, second pressing block. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0036] Directional terms mentioned in the present invention, such as "upper", "lower", "inner", "outer", "side", etc., are only used to refer to the directions of the drawings. The directional terms used are used to illustrate and understand the present invention, but are not used to limit the present invention.

[0037] The words "first", "second" and the like in the terminology of the present invention are used for descriptive purposes only and should not be understood as indicating or implying relative importance, and should not be construed as limiting the order of precedence.

[0038] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] See also Figure 1The preferred embodiment of the utility model provides a sending device compatible with multiple envelopes, including a transmission mechanism 1, a clamping mechanism 2, a pressure plate mechanism 3 and a swing arm mechanism 4; the transmission mechanism 1 includes a transmission component 11, and the transmission component 11 includes an output end 111; the clamping mechanism 2 includes two baffles 21, and the two baffles 21 are respectively located on both sides of the transmission component 11 and extend along the transmission direction of the transmission component 11. The two baffles 21 can move towards or away from each other, and the movement direction is perpendicular to the transmission direction of the transmission component 11. The two baffles 21 are used to limit the envelope 5 in the horizontal direction; the pressure plate mechanism 3 is located at the output end 111, and it includes a guide plate 31, and the guide plate 31 can move vertically up and down, and is used to limit the envelope 5 in the vertical direction; the swing arm mechanism 4 is located on the side of the pressure plate mechanism 3 away from the output end 111, and it includes a grabbing component 41, and the grabbing component 41 is used to extract a single envelope relative to the output end 111 and send the extracted single envelope out. Since the transmission mechanism 1 includes a transmission component 11, and the transmission component 11 includes an output end 111, when the envelope 5 enters the transmission component 11, it is transported to the output end 111, thereby realizing the automatic transportation of the envelope 5. The pressing mechanism 2 includes two baffles 21, which are respectively located on both sides of the transmission component 11 and extend along the transmission direction of the transmission component 11. The two baffles 21 limit the width of the envelope 5, and the two baffles 21 can move toward or away from each other, and the movement direction is perpendicular to the transmission direction of the transmission component 11. The two baffles 21 are used to limit the envelope 5 in the horizontal direction, and the distance between the two baffles 21 can be automatically adjusted to accommodate envelopes 5 of different widths. The pressing plate mechanism 3 is located at the output end 111, and includes a guide plate 31, which can move vertically up and down, and is used to limit the envelope 5 in the vertical direction. For envelopes 5 of different heights, the guide plate 31 can be automatically adjusted to the corresponding height. The swing arm mechanism 4 is located on the side of the pressure plate mechanism 3 that is far from the output end 111, and includes a grabbing assembly 41, which is used to extract a single envelope that is close to the output end 111 and send the extracted single envelope out, thereby sorting out the envelopes one by one. In summary, the device can automatically adjust the width limit and height limit of the envelope 5, greatly reducing the proficiency requirements of the personnel required to switch the model of the envelope 5, and improving the compatibility, and can be compatible with envelopes 5 of different sizes.

[0040] See also Figure 2 and Figure 3 The transmission assembly 11 includes a transmission belt 112 and a receiving plate 113. The receiving plate 113 is docked at the end of the transmission belt 112 that is closer to the output end 111. The receiving plate 113 and the transmission belt 112 form a whole so as to facilitate the continuous transportation of the envelope 5. The transmission belt 112 is arranged horizontally, and the receiving plate 113 is arranged downwardly inclined relative to the end away from the transmission belt 112. After the envelope 5 enters the receiving plate 113, it is easy to slide to the lowest end of the receiving plate 113, so as to facilitate the transportation of the envelope 5.

[0041] The transmission assembly 11 further includes a roller 114. A through hole 1131 is provided on the receiving plate 113. The roller 114 is disposed in the through hole 1131 and protrudes from the upper surface of the receiving plate 113. The axial direction of the roller 114 is perpendicular to the transmission direction of the transmission assembly 11. The roller 114 facilitates the transportation of the envelope 5 on the receiving plate 113 and ensures the consistency of the transportation direction of the envelope 5 on the transmission belt 112 and the receiving plate 113.

[0042] The transmission mechanism 1 further includes a transmission motor 12, a driving wheel 13, a driven wheel 14, a roller synchronous belt 15, a follower synchronous wheel 16 and a roller synchronous wheel 17. The transmission motor 12 is connected to the driving wheel 13 in transmission. The driving wheel 13 and the driven wheel 14 are respectively connected to the two ends of the transmission belt 112 in the transmission direction. The driving wheel 13 is closer to the output end 111 than the driven wheel 14. The follower synchronous wheel 16 is connected to the driving wheel 13. The follower synchronous wheel 16 is connected to the roller synchronous wheel 17 through the roller synchronous belt 15. The roller synchronous wheel 17 is connected to the roller 114. The transmission motor 12 drives the driving wheel 13, and the driving wheel 13 drives the transmission belt 112 and the driven wheel 14 to move. At the same time, the driving wheel 13 drives the follower synchronous wheel 16 to move, the follower synchronous wheel 16 drives the roller synchronous belt 15 and the roller synchronous wheel 17 to move, and the roller synchronous wheel 17 drives the roller 114 to rotate, so that the speed of the transmission belt 112 and the roller 114 in transporting the envelope 5 is kept consistent.

[0043] In this embodiment, the transmission mechanism 1 also includes a motor synchronous wheel 18 and a motor synchronous belt 19. Two follower synchronous wheels 16 are provided, which are respectively connected to the two ends of the driving wheel 13 in the axial direction. The motor synchronous wheel 18 is connected to the transmission motor 12, and one of the follower synchronous wheels 16 is connected to the motor synchronous wheel 18 through the motor synchronous belt 19, so that the transmission motor 12 is connected to the driving wheel 13 in transmission to provide power to the entire transmission component 11.

[0044] See also Figure 4 and Figure 5 The pressing plate mechanism 3 further includes two guide rails 32, a screw motor 33 and a slide plate 34. The two guide rails 32 are parallel to each other and vertically arranged. The two baffles 21 are located between the two guide rails 32. The two ends of the slide plate 34 are respectively slidably connected to the two guide rails 32. The guide plate 31 is connected to the side of the slide plate 34 facing the transmission component 11. The screw of the screw motor 33 is connected to the slide plate 34 to drive the slide plate 34 to move up and down, thereby driving the guide plate 31 to move up and down, so that the guide plate 31 is located at different heights to adapt to envelopes 5 of different sizes. The guide plate 31 can flatten the protruding envelope 5 to avoid uneven heights of the envelope 5, which affects the accuracy of the subsequent grabbing component 41 grabbing the envelope 5.

[0045] The pressing plate mechanism 3 further includes an upper pressing block 35, which is connected to the slide plate 34 and is located on the side of the guide plate 31 that is close to the output end 111. An upper pulley 36 is provided on the side of the upper pressing block 35 that faces the transmission assembly 11. The upper pulley 36 is provided with a gap between the guide plate 31 and the upper pulley 36, and protrudes from the guide plate 31 in the vertical direction close to the transmission assembly 11. The upper pulley 36 abuts against the upper edge of the single envelope that is close to the output end 111. When the single envelope that is close to the output end 111 abuts against the upper pulley 36, there is a set gap between the single envelope that is close to the output end 111 and the guide plate 31. When the grabbing assembly 41 grabs the single envelope that is close to the output end 111, the guide plate 31 will not block the envelope, and the upper pulley 36 rolls under the drive of the envelope to avoid blocking the upper edge of the envelope and to avoid damage to the upper edge of the envelope during the grabbing process.

[0046] In this embodiment, the gap between the upper pulley 36 and the guide plate 31 is smaller than the thickness of a single envelope to prevent envelopes from being stuck in the gap. The upper edge of the envelope stuck in the gap is not restricted by the guide plate 31 and is easily stuck to the envelopes near the output end 111 and taken away by the grabbing assembly 41 at the same time, resulting in the envelopes 5 being unable to be sorted out one by one, causing machine failure.

[0047] See also Figure 5 The output end 111 is provided with a limit bar 115, and the limit bar 115 is provided with a lower pulley 116; the two baffles 21 are provided with a stop bar 211 relative to the end near the output end 111, and the two stop bars 211 are provided with side pulleys 212; the limit bar 115, the two stop bars 211 and the upper pressing block 35 form a frame for limiting the position of the envelope 5 to prevent the envelope 5 from falling out of the output end 111. When the grabbing assembly 41 grabs a single envelope relative to the output end 111, the two side pulleys 212 and the lower pulley 116 roll under the drive of the envelope to avoid blocking the two side edges and the lower edge of the envelope, and to avoid damage to the two side edges and the lower edge of the envelope during the grabbing process.

[0048] In this embodiment, the pressing plate mechanism 3 is further provided with a sensor 37 , and the sensor 37 is used to detect whether there is an envelope 5 at the guide plate 31 . The sensor 37 can send a detection signal to the swing arm mechanism 4 .

[0049] See also Figure 6 The clamping mechanism 2 includes a clamping motor 22 and a bidirectional screw rod 23. The two baffles 21 are respectively connected to the two sets of nuts of the bidirectional screw rod 23. The clamping motor 22 is connected to one end of the bidirectional screw rod 23 to drive the bidirectional screw rod 23 to rotate so that the two sets of nuts move closer to or away from each other, thereby driving the two baffles 21 to move closer to or away from each other. The distance between the two baffles 21 can be adjusted to accommodate envelopes 5 of different specifications.

[0050] See also Figure 7 and Figure 8 The swing arm mechanism 4 also includes a swing arm motor 42 and a connecting rod assembly 43. The swing arm motor 42 is connected to the grabbing assembly 41 through the connecting rod assembly 43 to drive the grabbing assembly 41 to rotate; after the grabbing assembly 41 grabs the envelope 5, the swing arm motor 42 rotates to drive the connecting rod assembly 43 to move, thereby changing the direction of the grabbing assembly 41 from upward to downward. When the swing arm motor 42 rotates half a circle, the action is changed from Figure 7 Transformed into Figure 8 , after the grabbing assembly 41 puts down the envelope 5, the swing arm motor 42 rotates half a circle and changes to Figure 8 becomes Figure 7 One revolution of the swing arm motor 42 constitutes a cycle of taking and placing the envelope 5 .

[0051] The grabbing assembly 41 includes a connecting frame 411 and a suction cup 412 disposed on the connecting frame 411. The connecting frame 411 is provided with a plurality of connecting holes 413. The suction cup 412 can be connected to any of the connecting holes 413, so that the suction cup 412 is connected to different positions of the connecting frame 411. Since the position of the suction cup 412 is adjustable, even if the envelopes 5 are of different specifications, the grabbing assembly 41 can adjust the suction cup 412 to the center of the envelope 5 when grabbing the envelope 5, thereby ensuring the stability of the grabbing.

[0052] See also Figure 3 The transmission mechanism 1 also includes an envelope pressing block 117, which includes a first pressing block 1171 and a second pressing block 1172 which are vertically connected to each other; the second pressing block 1172 is vertically arranged to prevent the envelope 5 from falling over; guide grooves 118 are respectively arranged on both sides of the transmission belt 112, and the two guide grooves 118 are both located between the two baffles 21, and the outer surface of the transmission belt 112 protrudes from the two guide grooves 118, and the first pressing block 1171 is slidably connected to the two guide grooves 118, and the first pressing block 1171 is connected to the outer surface of the transmission belt 112, so that the envelope pressing block 117 moves synchronously with the transmission belt 112. Envelopes 5 are manually placed on the receiving plate 113 and the transmission belt 112 in sequence. When the envelopes 5 are fully laid, the envelope pressing block 117 is placed in the two guide grooves 118 to prevent the envelopes 5 from falling over. As the swing arm mechanism 4 continuously takes away the envelopes 5 one by one, after manually observing that the envelopes 5 on the transmission belt 112 are insufficient, the envelope pressing block 117 is picked up and filled with envelopes 5 in sequence, and then the envelope pressing block 117 is put back into the two guide grooves 118, and the process is repeated in sequence.

[0053] The sending device compatible with multiple envelopes also includes an input module (not shown in the figure), which is electrically connected to the clamping mechanism 2 and the pressing plate mechanism 3, and is used for the user to input the specifications of the envelope 5, thereby controlling the distance between the two baffles 21 and the upper and lower positions of the guide plate 31. It is simple and fast for the user to switch the model of the envelope 5, saving time and effort.

[0054] Working principle: manually put a stack of envelopes 5 into the receiving plate 113 and the transmission belt 112 in sequence. When the envelopes 5 are full, put the envelope pressing block 117 into the two guide grooves 118 to prevent the envelopes 5 from falling. The transmission belt 112 and the roller 114 transport the envelopes 5 to the output end 111. At the same time, the swing arm mechanism 4 continuously takes away the envelopes 5 one by one. By counting, a specified number of envelopes 5 are taken away each time, such as 20. When 20 envelopes 5 are taken away one by one, the transmission belt 112 and the roller 114 stop driving. At this time, the transmission belt 112 and the roller 114 only rotate for a period of time, such as 3 seconds. At this time, if there are still remaining envelopes 5, the above actions are repeated in sequence. If there are not enough envelopes 5, the user can pick up the envelope pressing block 117, fill the envelopes 5 in sequence, and put the envelope pressing block 117 into the guide groove 118 again, and then repeat the above actions in sequence.

[0055] In summary, although the present invention has been disclosed as above in terms of preferred embodiments, the above preferred embodiments are not intended to limit the present invention. A person skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope defined in the claims.

Claims

1. A sending device compatible with multiple envelopes, characterized by: It includes a transmission mechanism, a clamping mechanism, a pressing plate mechanism and a swing arm mechanism; The transmission mechanism includes a transmission component, and the transmission component includes an output end; The clamping mechanism includes two baffles, which are respectively located on both sides of the transmission component and extend along the transmission direction of the transmission component. The two baffles can move towards or away from each other, and the movement direction is perpendicular to the transmission direction of the transmission component. The two baffles are used to limit the envelope in the horizontal direction; The pressing plate mechanism is located at the output end, and includes a guide plate, and the guide plate can move vertically up and down, and is used to limit the envelope in the vertical direction; The swing arm mechanism is located on a side of the pressure plate mechanism that is relatively far from the output end, and includes a grabbing assembly, which is used to extract a single envelope relatively close to the output end and send out the extracted single envelope.

2. The sending device compatible with multiple envelopes according to claim 1, characterized in that: The transmission assembly includes a transmission belt and a receiving plate, wherein the receiving plate is butted against an end of the transmission belt that is close to the output end, the transmission belt is horizontally arranged, and the receiving plate is tilted downward relative to an end that is away from the transmission belt.

3. The sending device compatible with multiple envelopes according to claim 2, characterized in that: The transmission component also includes a roller. A through hole is provided on the receiving plate. The roller is arranged in the through hole and protrudes from the upper surface of the receiving plate. The axial direction of the roller is perpendicular to the transmission direction of the transmission component.

4. The sending device compatible with multiple envelopes according to claim 3, characterized in that: The transmission mechanism also includes a transmission motor, a driving wheel, a driven wheel, a roller synchronous belt, a follower synchronous wheel and a roller synchronous wheel. The transmission motor is connected to the driving wheel in a transmission manner. The driving wheel and the driven wheel are respectively connected to the two ends of the transmission belt in the transmission direction. The driving wheel is closer to the output end than the driven wheel. The follower synchronous wheel is connected to the driving wheel. The follower synchronous wheel is connected to the roller synchronous wheel through the roller synchronous belt, and the roller synchronous wheel is connected to the roller.

5. The sending device compatible with multiple envelopes according to claim 1, characterized in that: The pressure plate mechanism also includes two guide rails, a screw motor and a slide plate. The two guide rails are parallel to each other and vertically arranged. The two baffles are located between the two guide rails. The two ends of the slide plate are respectively slidably connected to the two guide rails. The guide plate is connected to the side of the slide plate facing the transmission component. The screw of the screw motor is connected to the slide plate for driving the slide plate to move up and down, thereby driving the guide plate to move up and down.

6. The sending device compatible with multiple envelopes according to claim 5, characterized in that: The pressing plate mechanism further comprises an upper pressing block, which is connected to the slide plate and is located on a side of the guide plate that is close to the output end; An upper pulley is provided on the side of the upper pressing block facing the transmission component, a gap is set between the upper pulley and the guide plate, and the upper pulley protrudes from the guide plate in the vertical direction close to the transmission component; the upper pulley abuts against the upper edge of the single envelope close to the output end, and when the single envelope close to the output end abuts against the upper pulley, a set gap is provided between the single envelope close to the output end and the guide plate.

7. The sending device compatible with multiple envelopes according to claim 6, characterized in that: The output end is provided with a limit bar, and the limit bar is provided with a lower pulley; the two baffles are provided with baffles relative to the ends close to the output end, and the two baffles are provided with side pulleys; the limit bar, the two baffles and the upper pressure block form a frame for limiting the envelope.

8. The sending device compatible with multiple envelopes according to claim 1, characterized in that: The swing arm mechanism also includes a swing arm motor and a connecting rod assembly, and the swing arm motor is connected to the grabbing assembly through the connecting rod assembly to drive the grabbing assembly to rotate; The grabbing assembly includes a connecting frame and a suction cup arranged on the connecting frame. The connecting frame is provided with a plurality of connecting holes. The suction cup can be connected to any of the connecting holes so that the suction cup is connected to different positions of the connecting frame.

9. The sending device compatible with multiple envelopes according to claim 2, characterized in that: The transmission mechanism further comprises an envelope pressing block, wherein the envelope pressing block comprises a first pressing block and a second pressing block which are vertically connected to each other; the second pressing block is arranged vertically to prevent the envelope from tipping over; Guide grooves are respectively arranged on both sides of the transmission belt, and the two guide grooves are both located between the two baffles. The outer surface of the transmission belt protrudes from the two guide grooves. The first pressing block is slidingly connected to the two guide grooves, and the first pressing block is connected to the outer surface of the transmission belt so that the envelope pressing block moves synchronously with the transmission belt.

10. The sending device compatible with multiple envelopes according to any one of claims 1 to 9, characterized in that: The sending device compatible with multiple envelopes also includes an input module, which is electrically connected to the clamping mechanism and the pressure plate mechanism and is used for the user to input envelope specifications, thereby controlling the distance between the two baffles and the upper and lower positions of the guide plate.

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