Automatic material conveying device for freeze dryer

Abstract

The automatic material conveying device for the freeze dryer comprises an I-shaped rail frame, and a plurality of material conveying mechanisms are installed on the I-shaped rail frame; the material conveying mechanism comprises a U-shaped plate capable of moving on the I-shaped rail frame, a double-shaft motor is installed on the U-shaped plate, and the U-shaped plate can move on the I-shaped rail frame; a mounting plate is fixedly connected to the bottom of the U-shaped plate, four pull rods in sliding connection with the mounting plate are arranged on the mounting plate in a penetrating manner, a plurality of rectangular frames which are fixed with the pull rods and are distributed up and down sleeve the four pull rods, a placement groove is formed in the upper end of each rectangular frame, and a locked placement disc is placed in each placement groove. According to the device, automatic conveying of materials can be achieved, automatic unlocking and locking of the containing disc can be achieved, taking and placing of the containing disc are convenient, the materials during freeze-drying and after freeze-drying can be shaken, adhesion is avoided, and the freeze-drying and dewatering efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of material conveying, and in particular to an automatic material conveying device for a freeze dryer. Background Art

[0002] Freeze drying is to freeze a substance containing a large amount of water into a solid state by cooling it down in advance, and then sublimate the solid water directly under vacuum conditions, while the substance itself remains in the ice shelf when frozen, so its volume remains unchanged after drying. Freeze drying is carried out at low temperatures, so it is particularly suitable for many heat-sensitive substances.

[0003] The prior art publication number is CN114538013B, which is an automated material conveying device for freeze-drying equipment, including a track assembly hoisted on the top of the workshop and a trolley running on the track, the bottom of the trolley is connected to a tray bracket through an automatic locking structure, and a loading station and an unloading station are respectively arranged on both sides of the starting point of the track assembly. The automated material conveying device based on the track assembly is used to connect the segmentation area and the raw material transfer area; the track assembly is located at the loading station and the unloading station and includes a lifting track and a fixed track. The present invention is a mechanical structure dedicated to the automated conveying of freeze-drying equipment, which can realize multi-layer automated loading, transportation and unloading. It can more accurately realize the parking function of heavy transport equipment by setting a braking mechanism and a proximity sensor, so as to facilitate the loading and unloading of the mechanical arm.

[0004] The shortcomings of the above-mentioned prior art are that, since the materials to be freeze-dried are located in a static state in the placement tray and are initially in a moist state, the materials will stick together after the freeze-drying process; and the static freeze-drying process increases the time required for freeze-drying and dehydration of the stacked materials, thereby reducing the efficiency of the freeze-drying process of the materials; for this reason, the present application proposes an automatic material conveying device for a freeze dryer. Summary of the invention

[0005] The purpose of the present invention is to solve the above technical problems and to propose an automatic material conveying device for a freeze dryer.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] An automatic material conveying device for a freeze dryer comprises an I-shaped rail frame, on which a plurality of material conveying mechanisms are installed;

[0008] The material conveying mechanism comprises a U-shaped plate capable of moving on an I-shaped rail frame, a double-axis motor is installed on the U-shaped plate, a plurality of short rods arranged for rotation are passed through the U-shaped plate, a moving wheel is installed on the short rods, the moving wheel abuts against the inner bottom of the I-shaped rail frame, and the double-axis motor drives the moving wheel to rotate through a transmission mechanism, so that the U-shaped plate can move on the I-shaped rail frame;

[0009] The bottom of the U-shaped plate is fixedly connected with a mounting plate, and four pull rods are provided through the mounting plate for sliding connection therewith. The four pull rods are sleeved with a plurality of rectangular frames fixed therewith and distributed up and down, and a placement groove is provided at the upper end of the rectangular frame, and a locked placement plate is placed in the placement groove;

[0010] A shaking mechanism, when the U-shaped plate moves on the I-shaped rail frame, the placing plate can be shaken up and down through the shaking mechanism.

[0011] Preferably, the transmission mechanism includes a cross bar that passes through the U-shaped plate and is rotatably connected thereto, a transmission rod is fixedly connected to the two short rods above the cross bar, a first transmission wheel is installed on the transmission rod and the cross bar, and the two first transmission wheels are connected by a first belt, a first shaft rod is fixed to the output end of the dual-axis motor, a first gear is fixed on the first shaft rod, a first acceleration box is installed on the U-shaped plate, a driving shaft is fixed to the shaft end of the first acceleration box, a second gear is installed on the driving shaft, and the second gear is meshed with the first gear, one of the short rods is fixedly connected to the other shaft end of the first acceleration box, a second transmission wheel is installed on the short rod connected to the first acceleration box and the short rod connected to the transmission rod, and the two second transmission wheels are connected by a second belt.

[0012] Preferably, the first gear is an incomplete gear, and a diameter of the first gear is greater than a diameter of the second gear.

[0013] Preferably, it further comprises a limiting mechanism, which comprises a mounting frame rotatably mounted on the short rod, a roller rotatably mounted on the mounting frame, a wheel groove is provided on the I-shaped rail frame, and the roller rolls in the wheel groove.

[0014] Preferably, the shaking mechanism includes a second shaft rod fixed to the other shaft end of the dual-axis motor, the second shaft rod passes through the U-shaped plate and is rotatably connected thereto, the upper end of the pull rod is fixedly connected to a fixing ring, the bottom of the fixing ring is fixedly connected to a first spring, the lower end of the first spring is fixedly connected to the upper end of the mounting plate, and the first spring sleeve is arranged on the outside of the pull rod, and a connecting plate is fixed on two fixing rings located on the same side along the length direction of the I-shaped rail frame, the first shaft rod and the second shaft rod are both connected to a second acceleration box, the shaft ends of the two second acceleration boxes are respectively fixedly connected to a first rotating rod and a second rotating rod, and cams are installed on the first rotating rod and the second rotating rod, and the cams are movably opposed to the bottom of the connecting plate.

[0015] Preferably, it also includes a locking mechanism capable of locking the placement plate, the locking mechanism includes a first piston cylinder fixed on a rectangular frame, a first movable piston is slidably connected in the first piston cylinder, a fixing rod is fixed on the first movable piston, the fixing rod passes through the rectangular frame and is slidably connected thereto, a locking groove is provided on the placement plate, and the fixing rod is slidably connected in the locking groove.

[0016] Preferably, a notch is provided at the end of the first piston cylinder, and a plurality of the first piston cylinders are connected by a hose.

[0017] Preferably, it also includes an air supply mechanism, which includes a second piston cylinder, a second movable piston is slidably connected in the second piston cylinder, a second spring is fixedly connected to the second movable piston, the other end of the second spring is connected to the second piston cylinder, a limiting rod is fixed on the second movable piston, the limiting rod is fixedly connected to the U-shaped plate, a limiting block is fixed on the I-shaped rail frame, a stop block is fixed on the second piston cylinder, the stop block is cooperatively connected to the limit block, and the hose is connected to the second piston cylinder.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The second piston cylinder moves relative to the second movable piston, so that the air in the first piston cylinders can be sucked into the second piston cylinder through the hose, and negative pressure appears in the first piston cylinder, thereby driving the first movable piston and the fixed rod to move, so that the fixed rod is not located in the placement groove, which is convenient for placing the placement plate in the placement groove without interference from the fixed rod.

[0020] 2. The rotation of the first gear drives the second gear to rotate, and the rotation of the second gear drives the driving shaft to rotate. The short rod is quickly rotated through the transmission of the first speed reduction box, thereby realizing the rotation of the moving wheel. The adjacent short rods and the moving wheel are moved through the transmission of the second transmission wheel and the second belt. The moving wheels on both sides of the I-shaped rail frame can be rotated through the transmission of the first transmission wheel, the first belt and the cross bar, thereby ensuring the stable movement of the material conveying mechanism on the I-shaped rail frame.

[0021] 3. The U-shaped plate moves to make the block disengage from the limit block. At this time, the block is no longer limited. Under the action of the second spring, the second piston cylinder is reset. The air in the second piston cylinder can be transported to the first piston cylinder through the hose. The air pressure in the first piston cylinder increases, thereby driving the first movable piston and the fixed rod to move. When the second piston cylinder is completely reset, the fixed rod is stuck in the lock groove, and the placement plate can be fixed in the rectangular frame, thereby ensuring its stability when placed in the rectangular frame.

[0022] 4. Since the arc of the meshing of the first gear and the second gear is fixed, the length of the movement of the moving wheel is fixed. Therefore, after the first material conveying mechanism moves into the freeze dryer, the second material conveying mechanism adjacent to the material conveying mechanism moves a fixed distance. When the stopper on the second material conveying mechanism abuts against the limit block, the above-mentioned placement of the placement plate is repeated. After the placement is completed, the dual-axis motor can realize the movement of the material conveying mechanism, and finally abuts against the first material conveying mechanism. At this time, the first gear and the second gear are meshed. Such reciprocating conveying can complete the automatic conveying of materials.

[0023] 5. The cam rotates continuously, so the placement plate can shake up and down, which can make the cold air contact with the material better, improve the efficiency of material dehydration, and avoid the situation where the material is stuck during the dehydration process.

[0024] 6. After freeze drying is completed, open the freeze dryer door, start the dual-axis motor to reverse it, and finally, the first gear and the second gear are meshed, so that multiple material conveying mechanisms can be moved out. During the period when the first gear and the second gear are not meshed, the cam is still rotating, so that the cold air in the material can be dispersed; when the material conveying mechanism is moved out of the freeze dryer, the cam is still rotating, so as to further disperse the cold air in the material for subsequent processing of the material.

[0025] In summary, the present invention can realize automatic transportation of materials, and can realize automatic unlocking and locking of the placement tray, which is convenient for taking and placing the placement tray, and can shake the freeze-dried and freeze-dried materials to avoid adhesion and improve the efficiency of freeze-drying dehydration. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic structural diagram of an automatic material conveying device for a freeze dryer proposed by the present invention;

[0027] Figure 2 This is a rear view of an automatic material conveying device for a freeze dryer proposed by the present invention;

[0028] Figure 3 This is a schematic diagram of the structure of the mounting plate in an automatic material conveying device for a freeze dryer proposed by the present invention;

[0029] Figure 4 This is a schematic structural diagram of a rectangular frame in an automatic material conveying device for a freeze dryer proposed by the present invention;

[0030] Figure 5 This is a schematic structural diagram of a first piston cylinder in an automatic material conveying device for a freeze dryer proposed by the present invention;

[0031] Figure 6 This is a structural schematic diagram of a U-shaped plate in an automatic material conveying device for a freeze dryer proposed by the present invention;

[0032] Figure 7 This is a structural schematic diagram of a cam in an automatic material conveying device for a freeze dryer proposed by the present invention;

[0033] Figure 8 This is a schematic structural diagram of a second transmission wheel in an automatic material conveying device for a freeze dryer proposed by the present invention;

[0034] Fig. 9 This is a schematic structural diagram of a crossbar in an automatic material conveying device for a freeze dryer proposed by the present invention;

[0035] Fig.10 This is a cross-sectional view of a second piston cylinder in an automatic material conveying device for a freeze dryer proposed by the present invention.

[0036] In the figure: 1 I-shaped rail frame, 2 mounting plate, 3 U-shaped plate, 4 rectangular frame, 5 pull rod, 6 fixing ring, 7 first spring, 8 hose, 9 cam, 10 second piston cylinder, 11 first piston cylinder, 12 placement plate, 13 placement groove, 14 lock groove, 15 first movable piston, 16 fixing rod, 17 notch, 18 dual-axis motor, 19 first rotating rod, 20 first gear, 21 second gear, 22 first acceleration box, 23 limit block, 24 stopper, 25 limit rod, 26 cross bar, 27 first transmission wheel, 28 first belt, 29 second shaft rod, 30 moving wheel, 31 mounting frame, 32 roller, 33 short rod, 34 second belt, 35 second transmission wheel, 36 second movable piston, 37 second spring, 38 drive shaft, 39 transmission rod, 40 connecting plate, 41 second acceleration box, 42 second rotating rod. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0038] Reference Figure 1-Figure 10 , an automatic material conveying device for a freeze dryer, comprising an I-shaped rail frame 1, on which a plurality of material conveying mechanisms are mounted;

[0039] The material conveying mechanism includes a U-shaped plate 3 that can move on the I-shaped rail frame 1, a dual-axis motor 18 is installed on the U-shaped plate 3, and a plurality of short rods 33 that are rotatably arranged are passed through the U-shaped plate 3, and moving wheels 30 are installed on the short rods 33, and the moving wheels 30 are against the inner bottom of the I-shaped rail frame 1; wherein, in order to ensure the stable movement of the U-shaped plate 3 on the I-shaped rail frame 1, a limiting mechanism is also included, and the limiting mechanism includes a mounting frame 31 rotatably mounted on the short rods 33, and a roller 32 is rotatably mounted on the mounting frame 31, and a wheel groove is provided on the I-shaped rail frame 1, and the roller 32 rolls in the wheel groove.

[0040] The dual-axis motor 18 drives the moving wheel 30 to rotate through the transmission mechanism, so that the U-shaped plate 3 can move on the I-shaped rail frame 1; specifically, the transmission mechanism includes a cross bar 26 that penetrates the U-shaped plate 3 and is rotatably connected thereto, and two short bars 33 above the cross bar 26 are fixedly connected to a transmission rod 39, and the transmission rod 39 and the cross bar 26 are both installed with a first transmission wheel 27, and the two first transmission wheels 27 are connected by a first belt 28, such as Figure 8 As shown, the two moving wheels 30 installed on the U-shaped plate 3 and facing each other can rotate synchronously, so as to ensure the stable movement of the U-shaped plate 3 on the I-shaped rail frame 1.

[0041] A first shaft is fixed to the output end of the dual-axis motor 18, a first gear 20 is fixed on the first shaft, a first acceleration box 22 is installed on the U-shaped plate 3, a drive shaft 38 is fixed to the shaft end of the first acceleration box 22, a second gear 21 is installed on the drive shaft 38, and the second gear 21 is meshed with the first gear 20, wherein the first gear 20 is an incomplete gear, and the diameter of the first gear 20 is greater than the diameter of the second gear 21, so that the rotation of the first gear 20 can drive the second gear 21 to rotate intermittently.

[0042] One of the short rods 33 is fixedly connected to the other shaft end of the first acceleration box 22. The short rod 33 connected to the first acceleration box 22 and the short rod 33 connected to the transmission rod 39 are both equipped with a second transmission wheel 35. The two second transmission wheels 35 are connected by a second belt 34. Figure 8 As shown, the power of the dual-axis motor 18 can be transmitted to the short rod 33 in this way.

[0043] The bottom of the U-shaped plate 3 is fixedly connected to a mounting plate 2, and four pull rods 5 are penetrated on the mounting plate 2 and slidably connected thereto, and a plurality of rectangular frames 4 are sleeved on the four pull rods 5 and fixed thereto and distributed up and down, and a placement groove 13 is provided at the upper end of the rectangular frame 4, and a locked placement plate 12 is placed in the placement groove 13; it also includes a locking mechanism capable of locking the placement plate 12, and the locking mechanism includes a first piston cylinder 11 fixed on the rectangular frame 4, a first movable piston 15 is slidably connected in the first piston cylinder 11, a fixing rod 16 is fixed on the first movable piston 15, the fixing rod 16 penetrates the rectangular frame 4 and is slidably connected thereto, a locking groove 14 is provided on the placement plate 12, and the fixing rod 16 is slidably connected in the locking groove 14, a notch 17 is provided at the end of the first piston cylinder 11, and a plurality of first piston cylinders 11 are connected by a hose 8.

[0044] It also includes an air supply mechanism, which includes a second piston cylinder 10, a second movable piston 36 is slidably connected in the second piston cylinder 10, a second spring 37 is fixedly connected to the second movable piston 36, the other end of the second spring 37 is connected to the second piston cylinder 10, a limiting rod 25 is fixed on the second movable piston 36, the limiting rod 25 is fixedly connected to the U-shaped plate 3, a limiting block 23 is fixed on the I-shaped rail frame 1, a stopper 24 is fixed on the second piston cylinder 10, the stopper 24 is cooperatively connected to the limiter 23, and a hose 8 is connected to the second piston cylinder 10.

[0045] The shaking mechanism, when the U-shaped plate 3 moves on the I-shaped rail frame 1, the placing plate 12 can be shaken up and down by the shaking mechanism. The shaking mechanism includes a second shaft rod 29 fixed to the other shaft end of the dual-axis motor 18, the second shaft rod 29 passes through the U-shaped plate 3 and is rotatably connected thereto, the upper end of the pull rod 5 is fixedly connected to a fixing ring 6, the bottom of the fixing ring 6 is fixedly connected to a first spring 7, the lower end of the first spring 7 is fixedly connected to the upper end of the mounting plate 2, and the first spring 7 is sleeved on the outside of the pull rod 5, and a connecting plate 40 is fixed on two fixing rings 6 located on the same side along the length direction of the I-shaped rail frame 1, the first shaft rod and the second shaft rod 29 are both connected to a second acceleration box 41, the shaft ends of the two second acceleration boxes 41 are respectively fixedly connected to the first rotating rod 19 and the second rotating rod 42, the first rotating rod 19 and the second rotating rod 42 are both installed with cams 9, the cam 9 is movably opposed to the bottom of the connecting plate 40, wherein the second acceleration box 41 is fixed to the U-shaped plate 3 through a bracket.

[0046] When the present invention is used, the first material conveying mechanism is located at Figure 1In the position shown, the limit block 23 and the stop block 24 are at odds with each other, the limit block 23 drives the stop block 24 to move, the movement of the stop block 24 drives the second piston cylinder 10 to move, the second piston cylinder 10 moves relative to the second movable piston 36, so that the air in the first piston cylinder 11 can be sucked into the second piston cylinder 10 through the hose 8, and negative pressure appears in the first piston cylinder 11, so that the first movable piston 15 and the fixed rod 16 can be driven to move, so that the fixed rod 16 is not located in the placement groove 13, so that it is convenient for the staff or the manipulator to place the placement plate 12 in the placement groove 13 without interference from the fixed rod 16;

[0047] After the placement is completed, the double-axis motor 18 works, and the double-axis motor 18 works to drive the first shaft rod to rotate, and the rotation of the first shaft rod drives the first gear 20 to rotate, and the rotation of the first gear 20 drives the second gear 21 to rotate, and the rotation of the second gear 21 drives the driving shaft 38 to rotate, and the short rod 33 is quickly rotated through the transmission of the first acceleration box 22, so that the moving wheel 30 is rotated, and the adjacent short rods 33 and the moving wheel 30 are moved under the transmission of the second transmission wheel 35 and the second belt 34, and the moving wheels 30 on both sides of the I-shaped rail frame 1 can be rotated through the transmission of the first transmission wheel 27, the first belt 28 and the cross bar 26, so that the material conveying mechanism can ensure stable movement on the I-shaped rail frame 1;

[0048] The U-shaped plate 3 moves so that the stopper 24 is disengaged from the limit block 23. At this time, the stopper 24 is no longer limited. Under the action of the second spring 37, the second piston cylinder 10 is reset, and the air in the second piston cylinder 10 can be transported to the first piston cylinder 11 through the hose 8. The air pressure in the first piston cylinder 11 increases, thereby driving the first movable piston 15 and the fixed rod 16 to move. When the second piston cylinder 10 is completely reset, the fixed rod 16 is now stuck in the lock groove 14, and the placement plate 12 can be fixed in the rectangular frame 4, thereby ensuring its stability in the rectangular frame 4.

[0049] The rotation of the dual-axis motor 18 drives the second shaft 29 to rotate, and the first rotating rod 19 and the second rotating rod 42 can be rotated through the transmission of the second acceleration box 41. The first rotating rod 19 and the second rotating rod 42 drive the cam 9 to rotate, so as to drive the connecting plate 40 to move upward, and the upward movement of the connecting plate 40 drives the fixing ring 6 to move upward, and then the four pull rods 5 are mobilized to move upward. At this time, the first spring 7 is stretched. When the cam 9 no longer pushes the connecting plate 40 to move upward, the connecting plate 40 is reset under the action of the first spring 7. In this way, the continuous rotation of the cam 9 can realize a small shaking of the connecting plate 40 up and down, but will not cause the placement plate 12 that is not limited to be separated from the placement groove 13.

[0050] In this way, the material in the placement tray 12 can be shaken, and finally, the material conveying mechanism moves into the freeze dryer; at this time, the first material conveying mechanism is located at the innermost side of the freeze dryer, and the first gear 20 is not meshed with the second gear 21, that is, the material conveying mechanism remains stationary at this time;

[0051] Since the arc of the meshing of the first gear 20 and the second gear 21 is fixed, the length of the transmission to the moving wheel 30 to move the moving wheel 30 is fixed. Therefore, after the first material conveying mechanism moves into the freeze dryer, the second material conveying mechanism adjacent to the material conveying mechanism moves a fixed distance. When the stopper 24 on the second material conveying mechanism abuts against the limit block 23, the above-mentioned placement of the placement plate 12 is repeated. After the placement is completed, the dual-axis motor 18 works to realize the movement of the material conveying mechanism, and finally abuts against the first material conveying mechanism. At this time, the first gear 20 and the second gear 21 are meshed. Such reciprocating conveying can complete the automatic conveying of materials.

[0052] After the transportation is completed, close the freeze dryer door and carry out low-temperature freeze drying;

[0053] At this time, the dual-axis motor 18 works continuously, that is, the cam 9 rotates continuously, so that the placement plate 12 can shake up and down, so that the cold air can better contact with the material, the efficiency of material dehydration can be improved, and the material dehydration process can be prevented from sticking;

[0054] After a period of time, the dual-axis motor 18 is turned off;

[0055] After the freeze drying is completed, the freeze dryer door is opened, and the dual-axis motor 18 is started to work and reverse. Finally, the first gear 20 and the second gear 21 are meshed, so that the multiple material conveying mechanisms can be moved out. During the period when the first gear 20 and the second gear 21 are not meshed, the cam 9 is still rotating, so that the cold air in the material can be dispersed;

[0056] When the material conveying mechanism is moved out of the freeze dryer, the cam 9 is still rotating, thereby further dispersing the cold air in the material for subsequent processing of the material.

[0057] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An automated material conveying device for a freeze dryer, comprising an I-shaped rail frame (1), characterized in that: A plurality of material conveying mechanisms are installed on the I-shaped rail frame (1); The material conveying mechanism comprises a U-shaped plate (3) capable of moving on an I-shaped rail frame (1), a double-axis motor (18) being mounted on the U-shaped plate (3), a plurality of short rods (33) being rotatably disposed through the U-shaped plate (3), a moving wheel (30) being mounted on the short rods (33), the moving wheel (30) being in contact with the inner bottom of the I-shaped rail frame (1), the double-axis motor (18) driving the moving wheel (30) to rotate via a transmission mechanism, thereby enabling the U-shaped plate (3) to move on the I-shaped rail frame (1); The bottom of the U-shaped plate (3) is fixedly connected to a mounting plate (2), and four pull rods (5) are provided through the mounting plate (2) and are slidably connected thereto. The four pull rods (5) are sleeved with a plurality of rectangular frames (4) fixed thereto and distributed up and down, and a placement groove (13) is provided at the upper end of the rectangular frame (4), and a locked placement plate (12) is placed in the placement groove (13); A shaking mechanism, when the U-shaped plate (3) moves on the I-shaped rail frame (1), the placing plate (12) can be shaken up and down by the shaking mechanism.

2. The automatic material conveying device for a freeze dryer according to claim 1, characterized in that: The transmission mechanism comprises a cross bar (26) penetrating the U-shaped plate (3) and rotatably connected thereto, two short bars (33) above the cross bar (26) are fixedly connected to a transmission rod (39), the transmission rod (39) and the cross bar (26) are both mounted with a first transmission wheel (27), the two first transmission wheels (27) are connected via a first belt (28), a first shaft is fixed to the output end of the double-shaft motor (18), a first gear (20) is fixed to the first shaft, and a first acceleration box (22) is mounted on the U-shaped plate (3) A drive shaft (38) is fixed to the shaft end of the first acceleration box (22), a second gear (21) is mounted on the drive shaft (38), the second gear (21) is meshed with the first gear (20), one of the short rods (33) is fixedly connected to the other shaft end of the first acceleration box (22), a second transmission wheel (35) is mounted on the short rod (33) connected to the first acceleration box (22) and the short rod (33) connected to the transmission rod (39), and the two second transmission wheels (35) are connected via a second belt (34).

3. The automatic material conveying device for a freeze dryer according to claim 2, characterized in that: The first gear (20) is an incomplete gear, and the diameter of the first gear (20) is greater than the diameter of the second gear (21).

4. The automatic material conveying device for a freeze dryer according to claim 1, characterized in that: The invention also comprises a limiting mechanism, wherein the limiting mechanism comprises a mounting frame (31) rotatably mounted on a short rod (33), a roller (32) rotatably mounted on the mounting frame (31), a wheel groove is provided on the I-shaped rail frame (1), and the roller (32) rolls in the wheel groove.

5. The automatic material conveying device for a freeze dryer according to claim 2, characterized in that: The shaking mechanism includes a second shaft rod (29) fixed to the other shaft end of the dual-shaft motor (18), the second shaft rod (29) passes through the U-shaped plate (3) and is rotatably connected thereto, the upper end of the pull rod (5) is fixedly connected to a fixing ring (6), the bottom of the fixing ring (6) is fixedly connected to a first spring (7), the lower end of the first spring (7) is fixedly connected to the upper end of the mounting plate (2), and the first spring (7) is sleeved on the outside of the pull rod (5), and a connecting plate (40) is fixed on two fixing rings (6) located on the same side along the length direction of the I-shaped rail frame (1), the first shaft rod and the second shaft rod (29) are both connected to a second acceleration box (41), and the shaft ends of the two second acceleration boxes (41) are respectively fixedly connected to a first rotating rod (19) and a second rotating rod (42), and cams (9) are installed on the first rotating rod (19) and the second rotating rod (42), and the cams (9) are movably abutted against the bottom of the connecting plate (40).

6. The automatic material conveying device for a freeze dryer according to claim 1, characterized in that: The invention also comprises a locking mechanism capable of locking the placement plate (12), the locking mechanism comprising a first piston cylinder (11) fixed on the rectangular frame (4), a first movable piston (15) being slidably connected inside the first piston cylinder (11), a fixing rod (16) being fixed on the first movable piston (15), the fixing rod (16) passing through the rectangular frame (4) and being slidably connected thereto, a locking groove (14) being provided on the placement plate (12), and the fixing rod (16) being slidably connected in the locking groove (14).

7. The automatic material conveying device for a freeze dryer according to claim 6, characterized in that: A notch (17) is provided at the end of the first piston cylinder (11), and a plurality of the first piston cylinders (11) are connected via a hose (8).

8. The automatic material conveying device for a freeze dryer according to claim 7, characterized in that: The invention also comprises an air supply mechanism, which comprises a second piston cylinder (10), a second movable piston (36) is slidably connected inside the second piston cylinder (10), a second spring (37) is fixedly connected to the second movable piston (36), the other end of the second spring (37) is connected to the second piston cylinder (10), a limiting rod (25) is fixedly connected to the second movable piston (36), the limiting rod (25) is fixedly connected to the U-shaped plate (3), a limiting block (23) is fixedly connected to the I-shaped rail frame (1), a stopper (24) is fixedly connected to the second piston cylinder (10), the stopper (24) is cooperatively connected to the stopper (23), and the hose (8) is connected to the second piston cylinder (10).

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