Automatic feeding equipment

Abstract

The present invention relates to an automatic feeding device, comprising: a bracket; a roller feeding device, comprising a roller body with an opening, a loading block arranged on the inner peripheral wall of the roller body, and a driving mechanism for driving the roller body to rotate; and a direct vibration feeding device, supported on the bracket, comprising a direct vibration mechanism, a first screening unit supported on the direct vibration mechanism, and a second screening unit, the first screening unit is provided with a material receiving trough and a first material channel connected to the material receiving trough, and the second screening unit is provided with a second material channel connected to the first material channel for sequentially sending out materials; the first screening unit passes through the opening and is arranged in the roller body so that the screened materials fall into the roller body; the loading block scoops up the materials during the synchronous rotation with the roller body, and pours the materials into the material receiving trough when rotating above the material receiving trough, and the materials are sent out through the first material channel and the second material channel under the drive of the direct vibration mechanism.

Description

Technical Field

[0001] The invention relates to the technical field of vibrating feeding equipment production, and in particular to an automatic feeding equipment. Background Art

[0002] The vibration plate is an auxiliary feeding device for automatic assembly or automatic processing machinery. It can arrange various products in an orderly manner, and cooperate with automatic assembly equipment to assemble various parts of the product into a complete product, or cooperate with automatic processing machinery to complete the processing of the workpiece. There is a pulse electromagnet under the vibration plate hopper, which can make the hopper vibrate in the vertical direction, and the inclined spring sheet drives the hopper to do torsional vibration around its vertical axis. The parts in the hopper rise along the spiral track due to this vibration. Its working purpose is to automatically and orderly arrange the disordered workpieces in a directional and neat manner through vibration and accurately transport them to the next process.

[0003] The vibration plate is integrally formed, and the design of the curved surface, the feed trough and other external features require high precision and are difficult to process, so a four-axis or even five-axis machining center must be used for processing. In view of this problem, the inventor proposed this application. Summary of the invention

[0004] The purpose of the present invention is to provide an automatic feeding device with a roller feeding device, through which materials are fed into a direct vibration feeding device. The simple processing of the roller device solves the technical problem of the existing vibration plate processing difficulty.

[0005] The present invention is implemented as follows: an automatic feeding device comprises: a bracket;

[0006] The roller feeding device is supported on a bracket and comprises a roller body having an opening, a loading block arranged on the inner peripheral wall of the roller body, and a driving mechanism for driving the roller body to rotate; and

[0007] A direct vibration feeding device, supported on a bracket, comprises a direct vibration mechanism, a first screening unit supported on the direct vibration mechanism, and a second screening unit, wherein the first screening unit is provided with a material receiving trough and a first material channel connected to the material receiving trough, and the second screening unit is provided with a second material channel connected to the first material channel to sequentially feed the materials;

[0008] The first screening unit passes through the opening and is arranged in the drum body so that the screened material falls into the drum body; the loading block scoops up the material during the synchronous rotation with the drum body, and pours the material into the material receiving trough when it rotates above the material receiving trough, and the material is sent out through the first material channel and the second material channel under the drive of the direct vibration mechanism.

[0009] Preferably, the opening is located at the front end of the drum body, the loading block is arranged near the other end of the drum body away from the opening, and the drum body is tilted downward from front to back so that the material can slide to the loading block.

[0010] Preferably, an annular baffle is disposed at the opening; and a plurality of loading blocks are spaced apart on the inner circumference of the drum body.

[0011] Preferably, the first material channel includes a first screening section and a second screening section, and the first screening unit is provided with a first material drop-out port located at the front end of the material receiving trough for screening out materials that have not entered the first screening section, and a second material drop-out port located on the side where the first material channel connects to the second material channel for screening out materials that have not entered the second screening section.

[0012] Preferably, the first screening unit comprises a first stopper arranged at the rear end of the material receiving trough, and a second stopper and a third stopper arranged at the left and right sides of the material receiving trough, and the first stopper, the second stopper and the third stopper surround the material receiving trough.

[0013] Preferably, the first screening unit includes a third material channel formed along the left-right direction on a side of the second stop or the third stop away from the material receiving trough, and the third material channel is connected to the material receiving trough through a first opening formed between the third stop or the second stop and the first stop.

[0014] Preferably, the front end of the third material channel is connected to the first material channel, and the third material channel is located at the rear side of the second material drop opening.

[0015] Preferably, the third material channel is gradually inclined from high to low along the direction pointing to the first material channel, and the first material channel is not higher than the third material channel.

[0016] Preferably, the first screening unit includes a first base provided with the material receiving trough, the first material channel and the third material channel, and a material blocking component detachably mounted on the first base to form the first blocking part, the second blocking part and the third blocking part.

[0017] Preferably, the material stopping member comprises a first stopper having a first stopper portion, a second stopper having a second stopper portion, and a third stopper having a third stopper portion.

[0018] Preferably, the first stopper, the second stopper and the third stopper are respectively made of resin material.

[0019] Preferably, a mounting portion is disposed at the front end of the first base, a first cover is disposed on the mounting portion, and the first cover cooperates with the mounting portion to form the second screening section.

[0020] Preferably, the driving mechanism includes: a fixed plate supported on a bracket; a supporting member including two support rods supported on the fixed plate in a manner rotatable relative to the fixed plate, and a fixing portion arranged at the rear end of the support rods, the two support rods are located on the left and right sides below the roller body to support the roller body, the radial dimension of the fixing portion is larger than the radial dimension of the support rod so as to be supported at the rear end of the roller body to fix the roller body; and a driving member connected to one of the support rods to drive it to rotate, and the rotating support rod is used to drive the roller body to rotate.

[0021] Preferably, the output end of the driving member is connected to the supporting rod via a conveyor belt.

[0022] Preferably, the front end and the rear end of the support rod are respectively sleeved with elastic rubber rings abutting against the outer circumference of the roller body to support and drive the roller body to rotate.

[0023] Preferably, the second screening unit includes a second base, and a cover body arranged on the second base and cooperating with the second base to form the second material channel; the cross-section of the second material channel in the extension direction of the second material channel is configured as a material-imitation structure so that the material can move along the second material channel in sequence.

[0024] By adopting the above technical solution, the present invention can achieve the following technical effects:

[0025] 1. The automatic feeding equipment of the present invention is configured with a roller feeding device and a direct vibration feeding device partially arranged in the storage chamber, so that the roller body can feed materials to the direct vibration feeding device during the rotation process driven by the driving mechanism, which changes the existing vibration plate spiral feeding method, makes the roller body simple to process, and greatly reduces the production cost. Furthermore, unlike the spiral track of the vibration plate that is integrally processed and formed, so that it can only convey materials with limited structures or shapes, the roller feeding method of the present application can meet the needs of materials of different specifications, and will not get stuck when conveying materials of different structures. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 and Figure 2 It is a schematic diagram of the structure of the automatic feeding device of the present invention at different viewing angles;

[0027] Figure 3 is a schematic structural diagram of the first screening unit of the present invention;

[0028] Figure 4 It is a schematic structural diagram of the bracket and the direct vibration feeding device of the present invention;

[0029] Figure 5 For the present invention Figure 4 Schematic diagram of the cross-sectional structure at AA in the middle;

[0030] Figure 6 For the present invention Figure 4 Schematic diagram of the cross-sectional structure at BB in the middle;

[0031] Figure 7 It is a schematic cross-sectional structure diagram of the direct vibration feeding device of the present invention at the second screening section;

[0032] Figure 8 For the present invention Figure 4 Schematic diagram of the cross-section structure at CC in the middle;

[0033] Fig. 9 It is a structural schematic diagram of the driving mechanism of the present invention;

[0034] Fig.10 It is a structural schematic diagram of the drum body of the present invention.

[0035] Figure ID

[0036] 1. Bracket;

[0037] 2. Roller feeding device; 21. Roller body; 211. Main body; 212. Rear end cover; 22. Opening; 23. Loading block; 24. Annular baffle;

[0038] 3. Direct vibration feeding device; 31. First screening unit; 32. Second screening unit; 321. Second base; 322. Second cover; 33. Material blocking member; 331. First blocking portion; 332. Second blocking portion; 333. Third blocking portion; 34. First opening; 35. Second opening; 36. First blanking opening; 37. First base; 371. Mounting portion; 372. First cover; 38. Second blanking opening; 39. Direct vibration mechanism;

[0039] 4. driving mechanism; 41. fixing plate; 42. driving member; 43. supporting rod; 44. fixing part; 45. elastic rubber ring;

[0040] S1, receiving trough; S2, first material channel; S21, first screening section; S22, second screening section; S3, second material channel; S4, third material channel. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention.

[0042] In the description of the present invention, it needs to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "upper end", "lower end", "upper section", "lower section", "upper side", "lower side", "middle", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0043] Now combined Figures 1 to 10 The structure and function of the solution of this application are described in detail.

[0044] The present invention provides an automatic feeding device, referring to Figure 1 and Figure 2 , which includes a bracket 1, a roller feeding device 2 and a direct vibration feeding device 3. The roller feeding device 2 is supported on the bracket 1, and includes a roller body 21, a loading block 23 arranged on the inner circumferential wall of the roller body 21, and a driving mechanism 4 for driving the roller body 21 to rotate. The roller body 21 has a storage chamber and an opening 22 located at the front end of the storage chamber. The storage chamber is used to store materials, such as contact materials.

[0045] refer to Figures 1 to 3The direct vibration feeding device 3 is supported on the bracket 1, and includes a direct vibration mechanism 39 installed and fixed on the bracket 1, a first screening unit 31 supported on the direct vibration mechanism 39, and a second screening unit 32. Among them, the direct vibration mechanism 39 is a conventional direct vibration feeder, which is not described here. The first screening unit 31 is equipped with a material receiving trough S1 and a first material channel S2 connected to the material receiving trough S1, and the second screening unit 32 is equipped with a second material channel S3 connected to the first material channel S2 to send out the materials in sequence. The first screening unit 31 passes through the opening 22 and is arranged in the storage chamber, so that the screened materials fall back into the drum body 21. The material is scooped up during the synchronous rotation of the loading block 23 and the drum body 21, and the material is poured into the material receiving trough S1 when it rotates above the material receiving trough S1. The material is sent out through the first material channel S2 and the second material channel S3 driven by the direct vibration mechanism 39.

[0046] This embodiment configures the roller feeding device 2 and the direct vibration feeding device 3 partially arranged in the storage chamber, so that the roller body 21 can feed the direct vibration feeding device 3 during the rotation driven by the driving mechanism 4, which changes the existing spiral feeding method of the vibration disk, makes the roller body 21 simple to process, and greatly reduces the production cost. Furthermore, unlike the spiral track of the vibration disk that is integrally processed and formed, so that it can only convey materials with limited structure or appearance (for example, the outer dimensions of contact 1 (material 1) are: cap diameter φ6 height 3mm, rod diameter φ3 height 2mm; contact 2 (material 2) cap diameter φ6 height 1.5mm, rod diameter φ3 height 3.5mm, due to the inconsistent height of the two material caps, contact 2 will be stuck in the process of stacking materials and cannot be compatible), the roller feeding method of this application can meet the needs of materials of different specifications, and will not be stuck when conveying materials of different structures.

[0047] In one embodiment of the present invention, the opening 22 is located at the front end of the drum body, and the loading block 23 is arranged near the other end of the drum body 21 away from the opening 22. The drum body 21 is inclined downward from front to back, so that the screened material can slide to the rear end of the drum body, that is, the loading block, so that the loading block 23 can re-convey it to the direct vibration feeding device 3.

[0048] In one embodiment of the present invention, a plurality of loading blocks 23 are arranged at intervals along the circumferential direction on the inner circumference of the drum body. Preferably, the loading blocks 23 are arranged at equal intervals on the inner circumference of the drum body. By arranging at equal intervals, the speed of the output end can be controlled by controlling the working power of the driving member 42, thereby achieving the control of the frequency of each loading block 23 scooping up the material and the control of the frequency of each loading block 23 pouring the material into the receiving trough S1.

[0049] In one embodiment of the present invention, along the rotation direction of the drum body 21, the loading block 23 has a loading end face (that is, the loading end face is located at the front end of the loading block 23 along the rotation direction of the drum body 21), and when the loading end face is parallel to the gravity direction, the material can slide from the loading block 23 to the receiving trough S1. In a preferred solution, the center axis of the receiving trough S1 and the axis of the drum body 21 are in the same plane. It is understandable that in other embodiments, when the loading end face is parallel to the gravity direction, the receiving trough S1 is located at the lower side of the loading end face, so that the material can slide into the receiving trough S1. Preferably, there is a preset angle between the connecting line between the loading block 23 and the receiving trough S1 and the loading end face, for example, the tangent plane at the intersection of the extension of the loading end face and the inner circumference of the drum body 21 forms an angle less than 90° with the loading end face, so that the loading end face and the inner circumference of the drum body 21 form a hook portion, which can scoop up the material. Preferably, the preset angle between the cut surface at the intersection of the extension of the feeding end surface and the inner circumference of the drum body 21 and the feeding end surface is not less than 80°, that is, the angle between the connecting line between the feeding block and the receiving trough and the feeding end surface is less than 10°, so as to achieve the purpose of making the material slide easily to the receiving trough S1. For example, the angle between the connecting line between the feeding block and the receiving trough and the feeding end surface is designed to be 7°, so that it can scoop up the target amount of material and make the material slide easily to the receiving trough S1.

[0050] In one embodiment of the present invention, Fig.10 The opening 22 is provided with an annular baffle 24 , which is used to block the material so that it cannot fall out of the opening 22 .

[0051] In one embodiment of the present invention, Figure 1 , Figure 3 , Figure 4 as well as Figure 5 The first material channel S2 includes a first screening section S21 and a second screening section S22. The first screening unit 31 is provided with a first material drop-out port 36 located at the front end of the material receiving trough S1 for screening out materials that have not entered the first screening section S21, and a second material drop-out port 38 located on the side of the first material channel S2 where it connects to the second material channel S3 for screening out materials that have not entered the second screening section S22.

[0052] In one embodiment of the present invention, Figure 5The first screening unit 31 includes a first stopper 331 disposed at the rear end of the receiving trough S1, and a second stopper 332 and a third stopper 333 disposed at the left and right sides of the receiving trough S1. The first stopper 331, the second stopper 332 and the third stopper 333 surround the receiving trough S1. At least one of the first stopper 331, the second stopper 332 and the third stopper 333 is structured to be inclined from bottom to top in a direction away from the center of the receiving trough S1, so that the opening 22 of the receiving trough S1 gradually increases from bottom to top to be able to receive more materials.

[0053] In one embodiment of the present invention, Figure 5 and Figure 6 The first screening unit 31 also includes a third material channel S4. In the left-right direction, the third material channel S4 is formed on the side of the second blocking portion 332 or the third blocking portion 333 away from the material receiving trough S1, wherein the third blocking portion 333 or the second blocking portion 332 and the first blocking portion 331 have a first opening 34. The third material channel S4 is connected to the material receiving trough S1 through the first opening 34, so that excessive materials that cannot enter the first material channel S2 enter the third material channel S4 from the first opening 34. When there are too many materials on the third material channel S4, they can directly fall into the drum body 21.

[0054] In one embodiment of the present invention, the front end of the third material channel S4 is connected to the first material channel S2 through the second opening 35, so that the materials on the third material channel S4 can re-enter the first material channel S2 after being sorted, thereby improving the material conveying efficiency. Preferably, the third material channel S4 is located at the rear side of the second drop opening 38, so that when the materials in the third material channel S4 and the materials in the first material channel S2 are excessive and crowded, the materials can be screened from the second drop opening 38 to avoid the technical problem of stacking materials on the first material channel S2.

[0055] In one embodiment of the present invention, Figure 6 The third material channel S4 is gradually inclined from high to low along the direction pointing to the first material channel S2, and the first material channel S2 is not higher than the third material channel S4, that is, the second opening 35 is gradually inclined from high to low along the direction pointing to the first material channel S2, so that the material is preferentially able to enter the first material channel S2 to meet the amount of feed on the first channel, and then the material on the third channel falls onto the drum body 21.

[0056] In one embodiment of the present invention, Figure 5, the first screening unit 31 includes a first base 37, and a material receiving trough S1, a first material channel S2 and a third material channel S4 are formed on the first base 37. Among them, a material blocking member 33 is arranged on the first base 37, and the material blocking member 33 is installed on the first base 37 in a manner that it can be detached relative to the first base 37. The material blocking member 33 includes a first blocking portion 331, a second blocking portion 332 and a third blocking portion 333. When the material blocking member 33 is installed on the first base 37, it cooperates with the first base 37 to form the material receiving trough S1. In this embodiment, the material blocking member 33 includes a first stopper, a second stopper and a third stopper, the first stopper has the first stopper 331, the second stopper has the second stopper 332, and the third stopper has the third stopper 333. The first stopper, the second stopper and the third stopper are respectively installed and fixed on the first base 37 in a manner that they can be detached relative to the first base 37. In other embodiments, the first stopper 331 , the second stopper 332 and the third stopper 333 can be formed on the material stopping member 33 in an integrally formed manner.

[0057] In the embodiment of the present invention, the first material channel S2 is a structure formed on the first base 37 and is recessed downwards, and is used to limit the materials to enter the first material channel S2 in order. It can be used to limit the materials that meet the size specifications to enter the first material channel S2.

[0058] In one embodiment of the present invention, the material blocking member 33 is made of a resin material or a silicone rubber material, such as nylon 66, PP, etc. It is used to prevent the material from sliding into the receiving trough S1 and colliding with the baffle plate, thereby preventing the surface from being damaged, scratched, and / or blackened, etc., which may cause poor surface quality. It is understandable that the first block, the second block, and the third block can be made of a resin material or a silicone rubber material, respectively.

[0059] In one embodiment of the present invention, Figure 4 and Figure 7, the front end of the first base 37 is provided with a mounting portion 371, the mounting portion 371 is provided with a first cover 372, and the first cover 372 cooperates with the mounting portion 371 to form the second screening section S22. Among them, the front end of the first base 37 is provided with mounting portions 371 located on both sides of the first material channel S2, and two first covers 372 respectively installed on the two mounting portions 371, and the two first covers 372 cooperate to form the second screening section S22 with a cross-section of a material profiling structure, so that the material walking in the first screening section S21 in the correct direction or orientation enters the second screening section S22. Among them, the material that does not meet the correct direction or orientation is blocked by the mounting portion 371 and / or the first cover 372 and screened through the second drop port 38. By adopting a detachable first cover 372, it can be used to screen materials of different specifications by replacing first covers 372 of different specifications. It cooperates with the drum body 21, and relative to the vibration plate of the integrally formed spiral material channel, the present invention can meet the needs of conveying materials of more specifications.

[0060] In one embodiment of the present invention, Figure 1 , Figure 4 and Figure 8 The second screening unit 32 includes a second base 321, and a second cover 322 disposed on the second base 321 to cooperate with the second base 321 to form the second material channel S3. The cross-section of the second material channel S3 in the extension direction of the second material channel S3 is configured as a material-imitation structure so that the material can move along the second material channel S3 in sequence. Among them, in this embodiment, the second material channel S3 is formed by two second covers 322 cooperating with the second base 321, and the second material channel S3 is between the two second covers 322. By adopting a detachable second cover 322, it is possible to replace the second covers 322 of different specifications to transport materials of different specifications. It cooperates with the roller body 21 and the first cover 372, and relative to the vibration disk of the one-piece spiral material channel, the present invention can meet the needs of transporting materials of more specifications.

[0061] In one embodiment of the present invention, Figure 1 and Fig. 9, the driving mechanism 4 includes a fixed plate 41, a supporting member and a driving member 42. The fixed plate 41 is supported on the bracket 1 to support the supporting member on the bracket 1. It is understandable that in other embodiments, the fixed plate 41 can also be directly supported on other devices instead of being directly supported on the bracket 1. That is, the roller feeding device 2 and the direct vibration feeding device 3 are installed separately and are not directly formed as a whole. The supporting member includes two support rods 43 and a fixing portion 44, and the fixing portion 44 is arranged at the rear end of the support rod 43. The two support rods 43 are supported on the fixing plate 41 in a manner that they can rotate relative to the fixed plate 41. The two support rods 43 are located below the roller body 21 and support the roller body 21 in a left-right separated form. The radial dimension of the fixing portion 44 is larger than the radial dimension of the support rod 43, so that the fixing portion 44 abuts against the rear end of the roller body 21 and supports it. The driving member 42 is connected to one of the support rods 43 to drive it to rotate. The rotating support rod 43 can drive the roller body 21 to rotate. At the same time, the other rotatable support rod 43 rotates synchronously when the roller body 21 rotates, so that the two support rods 43 support the roller body 21 in a rotating manner. Preferably, the front end and the rear end of the support rod 43 are respectively sleeved with elastic rubber rings 45 that abut against the outer circumference of the roller body 21 to elastically support and drive the roller body 21 to rotate, so as to prevent the roller body 21 from hard collision.

[0062] In a preferred embodiment, the support member includes a fixing sleeve having a fixing portion 44 , which is fixed to the rear end of the support rod 43 in a detachable manner relative to the support rod 43 , that is, the fixing portion 44 is disposed at the rear end of the support rod 43 .

[0063] In a preferred embodiment, in combination Fig.10 The drum body 21 includes a main body 211 and a rear end cover 212, and the rear end cover 212 is fixed to the main body 211 in a detachable manner relative to the main body 211. The fixing portion 44 abuts against the rear end edge of the main body 211. The rear end cover 212 can be quickly removed to achieve the purpose of quickly replacing the loading block 23 and materials of different specifications. Preferably, a step is formed between the outer periphery of the rear end cover 212 and the outer periphery of the main body 211, so that the fixing portion 44 can be supported on the step.

[0064] In a preferred embodiment, the output end of the driving member 42 is connected to the support rod 43 through a conveyor belt. The driving member 42 is a conventional driving motor. By means of the conveyor belt transmission, the motor vibration is reduced and directly transmitted to the support rod 43, so as to achieve the purpose of stable rotation of the drum body 21. It is understandable that in other embodiments, the driving member 42 can be directly connected to the support rod 43 to drive it to rotate.

[0065] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An automatic feeding device, characterized in that: Include: Bracket; The roller feeding device comprises a roller body with an opening, a loading block arranged on the inner peripheral wall of the roller body, and a driving mechanism for driving the roller body to rotate; and A direct vibration feeding device, supported on a bracket, comprises a direct vibration mechanism, a first screening unit supported on the direct vibration mechanism, and a second screening unit, wherein the first screening unit is provided with a material receiving trough and a first material channel connected to the material receiving trough, and the second screening unit is provided with a second material channel connected to the first material channel to sequentially feed the materials; The first screening unit passes through the opening and is arranged in the drum body so that the screened materials fall into the drum body; the material loading block scoops up the materials during the synchronous rotation with the drum body, and pours the materials into the receiving trough when it rotates above the receiving trough, and the materials are sent out through the first material channel and the second material channel driven by the direct vibration mechanism; wherein, the first material channel includes a first screening section and a second screening section, and the first screening unit is provided with a first material drop opening located at the front end of the receiving trough for screening the materials that have not entered the first screening section, and a second material drop opening located at the side of the first material channel connected to the second material channel for screening the materials that have not entered the second screening section; The first screening unit comprises a first stopper arranged at the rear end of the material receiving trough, and a second stopper and a third stopper arranged at the left and right sides of the material receiving trough, wherein the first stopper, the second stopper and the third stopper surround the material receiving trough; the first screening unit further comprises a third material channel formed along the left-right direction at a side of the second stopper or the third stopper away from the material receiving trough, wherein the third material channel is connected to the material receiving trough through a first opening formed between the third stopper or the second stopper and the first stopper; Wherein, the front end of the third material channel is connected to the first material channel, and the third material channel is located at the rear side of the second material drop opening; The third material channel is gradually inclined from high to low in the direction pointing to the first material channel, and the first material channel is not higher than the third material channel; The second screening unit comprises a second base, and a second cover body disposed on the second base and cooperating with the second base to form the second material channel; The cross section of the second material channel in the extension direction of the second material channel is configured as a material-profiling structure so that the material can move along the second material channel in sequence.

2. The automatic feeding device according to claim 1, characterized in that: The opening is located at the front end of the drum body, the loading block is arranged near the other end of the drum body away from the opening, and the drum body is tilted downward from front to back so that the material can slide to the loading block; Along the rotation direction of the drum body, the loading block has a loading end surface, and when the loading end surface is parallel to the gravity direction, the material can slide from the loading block to the receiving trough; Wherein, an annular baffle is arranged at the opening; and a plurality of loading blocks are arranged at intervals on the inner circumference of the drum body.

3. The automatic feeding device according to claim 1, characterized in that: The first screening unit comprises a first base provided with the material receiving trough, the first material channel and the third material channel, and a material blocking member detachably mounted on the first base to form the first blocking portion, the second blocking portion and the third blocking portion; The material-blocking component comprises a first block having a first block portion, a second block having a second block portion, and a third block having a third block portion; the first block, the second block, and the third block are respectively made of resin material or silicone rubber material.

4. The automatic feeding device according to claim 3, characterized in that: The front end of the first base is provided with a mounting portion, the mounting portion is provided with a first cover body, and the first cover body cooperates with the mounting portion to form the second screening section.

5. The automatic feeding device according to claim 2, characterized in that: The driving mechanism comprises: A fixing plate supported on a bracket; A supporting member, comprising two supporting rods supported on the fixing plate in a manner rotatable relative to the fixing plate, and a fixing portion arranged at the rear end of the supporting rods, the two supporting rods being located at the left and right sides below the roller body to support the roller body, the fixing portion having a radial dimension greater than the radial dimension of the supporting rods to be supported at the rear end of the roller body to fix the roller body; and A driving member, connected to one of the support rods to drive the support rod to rotate, wherein the rotating support rod is used to drive the drum body to rotate; Wherein, the output end of the driving member is connected to the supporting rod through a conveyor belt.

6. The automatic feeding device according to claim 5, characterized in that: The front end and the rear end of the support rod are respectively sleeved with elastic rubber rings abutting against the outer periphery of the roller body to support and drive the roller body to rotate.

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