Stock bin door structure for grain counting machine

Abstract

The utility model discloses a stock bin door structure for a grain counting machine, which comprises a stock bin, a door plate and a driving motor, the upper end of the door plate is connected with a door opening connecting piece, the output end of the driving motor is connected with a push wheel, the push wheel is contacted with one side, far away from the stock bin, of the door opening connecting piece, and a tension spring and a tension spring connecting piece are horizontally arranged above the push wheel. The front end of the tension spring is connected with the door opening connecting piece, the rear end of the tension spring is connected with the tension spring connecting piece, and a discharging end opening in the bottom of the stock bin is an inclined opening inclining forwards and downwards. According to the stock bin door structure for the grain counting machine, opening and closing of the stock bin door are controlled through the driving motor, the push wheel, the tension spring and the door opening connecting piece, in the opening and closing process of the stock bin door, the overall operation noise of equipment is low, the stretching distance of the tension spring is short, the service life of the tension spring is long, and the replacement frequency of the tension spring is low; and the situations of material bouncing and material sticking are not prone to occurring, and the sealing performance between the door plate and the discharging port of the stock bin is good.

Description

Technical Field

[0001] This utility model relates to a hopper door structure for a pellet counting machine, belonging to the field of automatic counting and packaging technology. Background Technology

[0002] Subcontracting of counting operations is involved in many industries, such as: pharmaceutical counting subcontracting, agricultural counting subcontracting, food counting subcontracting, daily necessities counting subcontracting, and counting subcontracting of mechanical parts or workpieces.

[0003] With the rapid development of automation and intelligent technologies, counting and packaging operations have begun to move towards fully automated operation. A grain counting machine is a commonly used automated counting and packaging device, typically including a feeding mechanism, a hopper, and a counting mechanism (e.g., a counter, a vision camera, etc.). During the counting and packaging process, materials are fed into the hopper by the feeding mechanism and counted by the counting mechanism.

[0004] The hopper door structure of current pellet counting machines is typically as follows: Figure 1 As shown, the device includes a hopper, a door panel assembly, and a drive motor. The hopper's discharge port is flat. The output end of the drive motor is connected to a push wheel. The door panel assembly includes a door panel and an opening connector located at the upper end of the door panel. A rotating shaft is located on the side of the opening connector away from the push wheel, and a torsion spring is installed on the rotating shaft. In use, the door panel assembly is pressed against the hopper's discharge port under the tension of the torsion spring, and the hopper door is closed. The material falls into the hopper under the action of the feeding mechanism and is collected by the hopper. After the hopper has collected the material, the drive motor rotates clockwise to drive the push wheel to rotate, and the push wheel pushes the door panel assembly to rotate clockwise, opening the hopper door and allowing the material to fall. After the material has fallen, the drive motor rotates counterclockwise to drive the push wheel to rotate counterclockwise, causing the push wheel to leave the contact surface between itself and the door panel assembly. The door panel assembly is then pushed by the torsion spring and contacts the hopper until the door panel assembly contacts and presses against the hopper's discharge port, closing the hopper door. The hopper continues to collect material, and this cycle repeats for counting and packaging. However, the current silo door structure suffers from several drawbacks. The motor rotates at a large angle, and the pusher has a long stroke. The pusher intermittently contacts and separates from the door connector, resulting in loud noise when in contact, thus increasing overall equipment noise. Furthermore, the torsion spring is a consumable component; it easily loses its elasticity and becomes loose over time. Since the torsion spring's torque cannot be adjusted, once it becomes loose, it must be scrapped and replaced, which is inconvenient. Additionally, the loss of spring elasticity leads to a loose door closure, creating a gap between the door and the silo's discharge port, resulting in poor sealing. Moreover, the large torsional distance required for the torsion spring also shortens its lifespan, leading to frequent replacements. Finally, material falling into the silo is prone to bounce, causing inaccurate counting, and material easily sticks to the door as it falls from the silo. Utility Model Content

[0005] In view of the above-mentioned problems in the existing technology, the purpose of this utility model is to provide a hopper door structure for a pellet counter.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A hopper door structure for a pellet counter includes a hopper, a door panel, and a drive motor. The upper end of the door panel is connected to an opening connector, and the output end of the drive motor is connected to a push wheel. The push wheel contacts the side of the opening connector away from the hopper. A tension spring and a tension spring connector are horizontally arranged above the push wheel. The front end of the tension spring is connected to the opening connector, and the rear end of the tension spring is connected to the tension spring connector. Furthermore, the discharge port at the bottom of the hopper is a forward-sloping downward-sloping opening.

[0008] In one embodiment, the output end of the drive motor is connected to a door-opening rotating component, and the push wheel is mounted on the door-opening rotating component.

[0009] In one embodiment, a flip-up wear-resistant plate is provided on the rear side of the door opening connector, and the push wheel contacts the flip-up wear-resistant plate.

[0010] In one embodiment, the front side of the door opening connector is connected to a door opening rotating shaft that can rotate horizontally, one end of the door opening rotating shaft is provided with a door opening detection plate, and a photoelectric switch is provided on the side of the door opening detection plate.

[0011] One embodiment includes a mounting frame, on which the drive motor and the tension spring connector are both mounted.

[0012] In a preferred embodiment, the mounting bracket is provided with a motor fixing block, and the output end of the drive motor passes through the motor fixing block and is connected to the push wheel.

[0013] In a preferred embodiment, a spring adjusting screw is horizontally inserted through the upper end of the mounting bracket, and the front end of the spring adjusting screw passes through the mounting bracket and is connected to a tension spring connector. A hand-tightening nut is provided at the intersection of the spring adjusting screw and the mounting bracket.

[0014] A preferred embodiment includes a horizontally arranged support base plate and a hopper mounting plate horizontally arranged above the support base plate. Support columns are vertically connected between the four corners of the support base plate and the hopper mounting plate. The hopper is mounted on the hopper mounting plate, and the mounting frame is mounted on the support base plate and located below the hopper mounting plate.

[0015] Compared with the prior art, the beneficial technical effects of this utility model are as follows:

[0016] The hopper door structure for a pellet counting machine provided by this utility model has low overall operating noise during the opening and closing of the hopper door, short extension distance of the tension spring, long service life of the tension spring, low replacement frequency of the tension spring, and is not prone to material ejection or sticking. The door panel and the discharge port of the hopper have good sealing performance. The structure is simple, easy to use, and low in cost, and has significant practical value. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the hopper door structure in an existing pellet counter;

[0018] Figure 2 This is a schematic diagram of the hopper door structure for a pellet counter provided in this embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram of the hopper door structure for a pellet counter provided in this embodiment of the utility model after removing the mounting frame, hopper mounting plate, support base plate and support column;

[0020] Figure 4 This is a schematic diagram of the hopper door structure for a pellet counter provided in this embodiment of the utility model after removing the mounting frame, hopper mounting plate, support base plate, support column and hopper;

[0021] Figure 5 This is a schematic diagram of the hopper door structure for a pellet counter provided in this embodiment of the utility model, after removing the mounting frame, hopper mounting plate, support base plate, support column and hopper from another angle;

[0022] Figure 6 This is a schematic diagram of the push wheel, door opening connector, and flip-over wear-resistant plate in an embodiment of this utility model;

[0023] Figure 7 This is a schematic diagram of the door opening rotation shaft in an embodiment of this utility model;

[0024] Figure 8 This is a schematic diagram of the mounting bracket in an embodiment of this utility model;

[0025] Figure 9 This is a schematic diagram of the supporting base plate in an embodiment of this utility model;

[0026] The labels in the diagram are as follows:

[0027] 1 ， 1-1 The existing silo door structure of the silo; ， 1. The discharge port of the hopper; 2. ， 1. The door panels in the existing silo door structure; 3. ， 1. The drive motor in the existing silo door structure; 4. ， 5. Door opening connectors in existing silo door structures;， 6. The push rollers in the existing silo door structure; ， 7. The pivot in the existing silo door structure; ， 8. Torsion springs in existing silo door structures; ， 9. Door opening detection strip; ， Photoelectric switches;

[0028] 1. The hopper in the hopper door structure of the embodiment; 1-1. The discharge port of the hopper; 2. Door panel; 3. Drive motor; 4. Door opening connector; 5. Push wheel; 6. Tension spring; 7. Tension spring connector; 8. Door opening rotating component; 9. Tilting wear-resistant plate; 10. Door opening rotating shaft; 10-1. Slot; 11. Door opening detection plate; 11-1. Sheet-shaped part of the door opening detection plate; 11-2. Cylindrical part of the door opening detection plate; 12. Photoelectric switch; 13. Mounting bracket; 13-1. Lower tilting fixing adjustment plate; 13-1-1. 13-1-2 Slide groove for lower tilting and fixing adjustment plate; 13-2 Upper tilting and fixing adjustment plate; 13-2-1 Adjustment elongated hole; 13-2-2 Notch; 13-3 Tilting connecting plate; 13-3-1 Screw through hole; 14 Bearing seat; 15 Motor fixing block; 16 Spring adjusting screw; 17 Hand-tightening nut; 18 Tilting detection support plate; 19 Support base plate; 19-1 Slide groove for support base plate; 19-2 Elongated hole; 20 Hopper mounting plate; 21 Support column. Detailed Implementation

[0029] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be noted that the terminology used in this utility model is for the purpose of describing specific embodiments only and is not intended to limit the utility model. Unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by those skilled in the art. Terms such as "inner," "outer," "upper," "lower," "top," "bottom," "front," "rear," "left," "right," "vertical," and "horizontal," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms “set up,” “install,” “connect,” “link,” “fix,” etc., should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; they can refer to a direct connection or an indirect connection. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. It should also be noted that when an element is referred to as “fixed to” or “set on” another element, it can be directly on the other element or there may be an intermediate element.

[0030] Example

[0031] Please combine Figures 2 to 9 As shown: This embodiment provides a hopper door structure for a pellet counter, including a hopper 1, a door panel 2, and a drive motor 3. The upper end of the door panel 2 is connected to an opening connector 4. The output end of the drive motor 3 is connected to a push wheel 5. The push wheel 5 contacts the side of the opening connector 4 away from the hopper 1. A tension spring 6 and a tension spring connector 7 are horizontally arranged above the push wheel 5. The front end of the tension spring 6 is connected to the opening connector 4, and the rear end of the tension spring 6 is connected to the tension spring connector 7. Furthermore, the discharge port 1-1 at the bottom of the hopper 1 is a forward-sloping downward inclined opening.

[0032] In this embodiment, see Figure 2 As shown, the angle α between the discharge port 1-1 and the horizontal plane is 30~50°, for example, it can be 35°.

[0033] In this embodiment, the output end of the drive motor 3 is connected to the door opening rotating component 8, and the push wheel 5 is mounted on the door opening rotating component 8, which enhances the stability of the connection between the output end of the drive motor 3 and the push wheel 5. The drive motor 3 can be a commercially available product, including but not limited to commercially available stepper motors, servo motors, and micro speed-regulating motors.

[0034] In this embodiment, combined with Figures 4 to 6 As shown, the rear side of the door opening connector 4 is provided with a flip-up wear-resistant plate 9, and the push wheel 5 is in contact with the flip-up wear-resistant plate 9, which enhances the wear resistance of the door opening connector 4.

[0035] In this embodiment, combined with Figures 3 to 6 As shown, the front side of the door opening connector 4 is connected to a horizontally rotatable door opening rotating shaft 10. One end of the door opening rotating shaft 10 is provided with a door opening detection piece 11, and a photoelectric switch 12 is provided on the side of the door opening detection piece 11. The photoelectric switch 12 can be a commercially available product. The door opening detection piece 11 and the photoelectric switch 12 ensure the rotation angle of the door panel 2, thereby ensuring that the door panel 2 rotates to the correct position. When the door opening detection piece 11 contacts the corresponding photoelectric switch 12, it indicates that the door panel 2 has rotated to the correct position. In this embodiment, two door opening detection pieces 11 and two corresponding photoelectric switches 12 are provided, and the rotation angle of the door panel 2 when opening or closing is ensured by the two sets of door opening detection pieces 11 and photoelectric switches 12.

[0036] In addition, see Figure 4As shown, in this embodiment, the door opening detection piece 11 includes a sheet-like portion 11-1 and a cylindrical portion 11-2. The cylindrical portion 11-2 is axially sleeved on the outside of the door opening rotation shaft 10, and the sheet-like portion 11-1 is located at one end of the cylindrical portion 11-2. The cylindrical portion 11-2 has a plurality of fastening connection holes (omitted in the figure) arranged radially. During operation, when the sheet-like portion 11-1 contacts the corresponding photoelectric switch 12, it indicates that the door panel 2 has rotated into place. During installation, the cylindrical portion 11-2 is axially sleeved on the outside of the door opening rotation shaft 10, and fasteners (e.g., set screws, known technology, omitted in the figure) are installed in the fastening connection holes. In this way, the door opening detection piece 11 is fastened to the door opening rotation shaft 10. Due to the unique structure of the door opening detection plate 11, it can rotate around the door opening rotation axis 10, thus allowing the angle of the door opening detection plate 11 to be adjusted. Therefore, when adjusting the rotation angle of the limiting door panel 2, it is not necessary to change the position of the photoelectric switch 12; only the angle of the door opening detection plate 11 needs to be adjusted, making adjustment convenient. Traditional warehouse door structures, such as... Figure 1 As shown, door opening detection piece 8 ， The overall structure is an L-shaped sheet, with 8 door opening detection pieces. ， Installed on shaft 6 ， After going up, it cannot rotate around the axis 6 ， Rotate, i.e., open door detection plate 8 ， The angle cannot be adjusted; when using it, you need to adjust the limiting door panel 2. ， When rotating the photoelectric switch, the angle can only be adjusted up and down. ， The position is small, the adjustment range is small, and the adjustment is inconvenient.

[0037] In this embodiment, the door opening connector 4 and the door opening rotation shaft 10 can be connected using existing connection technology. For details, please refer to... Figure 6 and Figure 7 As shown, the door opening rotating shaft 10 is provided with a slot 10-1 that is adapted to the door opening connector 4. The door opening connector 4 is engaged in the slot 10-1, so that the door opening connector 4 and the door opening rotating shaft 10 are connected by a snap, thereby enabling the door opening connector 4 to rotate horizontally together with the door opening rotating shaft 10.

[0038] In this embodiment, see Figures 2 to 5 As shown, the silo door structure includes a mounting frame 13, and the drive motor 3 and the tension spring connector 7 are both mounted on the mounting frame 13 for mounting and fixing components such as the drive motor 3 and the tension spring connector 7 in the silo door structure.

[0039] In this embodiment, the height of the mounting bracket 13 is adjustable. For details, please refer to [link / reference needed]. Figures 3 to 5As shown, the mounting frame 13 includes two vertically and symmetrically arranged downward flip-up fixing adjustment plates 13-1. An upward flip-up fixing adjustment plate 13-2, which can move up and down along the downward flip-up fixing adjustment plate 13-1, is slidably connected to the downward flip-up fixing adjustment plate 13-1. A flip-up connecting plate 13-3 is connected between the tops of the upward flip-up fixing adjustment plates 13-2. A drive motor 3 is horizontally mounted on one of the upward flip-up fixing adjustment plates 13-2. A tension spring connector 7 is horizontally connected to the upper middle part of the flip-up connecting plate 13-3. The two ends of the door opening rotation shaft 10 are respectively movably connected to the front ends of the corresponding upward flip-up fixing adjustment plates 13-2. The mounting frame 13 is generally gantry-shaped.

[0040] The sliding connection between the lower flip-fixed adjusting plate 13-1 and the upper flip-fixed adjusting plate 13-2 can be achieved using existing technology. In this embodiment, see [reference needed]. Figure 8 As shown, the upper inner side of the lower flip-fixed adjustment plate 13-1 is provided with a sliding groove 13-1-1 that is adapted to the upper flip-fixed adjustment plate 13-2. The lower rear end of the lower flip-fixed adjustment plate 13-1 is slidably disposed in the sliding groove 13-1-1. Furthermore, a plurality of connecting fixing holes 13-1-2 are horizontally provided in the sliding groove 13-1-1 of the lower flip-fixed adjustment plate 13-1, and a plurality of adjusting elongated holes 13-2-1 extending in the vertical direction are horizontally provided in the lower rear end of the lower flip-fixed adjustment plate 13-1. During installation, place the lower rear end of the upper flip-fixing adjustment plate 13-2 into the slide groove 13-1-1 of the lower flip-fixing adjustment plate 13-1, move the upper flip-fixing adjustment plate 13-2 up and down, and when it reaches a suitable height, pass the fastener (which is a known technology and is omitted in the figure) through the connecting fixing hole 13-1-2 and the adjusting elongated hole 13-2-1 to connect and fix the lower flip-fixing adjustment plate 13-1 and the upper flip-fixing adjustment plate 13-2. Figure 1 In existing silo door structures, the height of the door panel is usually not adjustable. However, in this embodiment, by setting the lower flip-fixed adjustment plate 13-1 and the upper flip-fixed adjustment plate 13-2, the overall height of the mounting frame 13 is adjustable, which in turn makes the height of each component installed on the mounting frame 13 adjustable, and thus the height of the door panel 2 is adjustable. In this way, the height of the door panel 2 can be adjusted by adjusting the height of the mounting frame 13, thereby achieving a tight fit between the door panel 2 and the discharge port 1-1 of the silo 1. Compared with the existing silo door structure, the tightness between the door panel 2 and the discharge port 1-1 of the silo 1 is better.

[0041] In addition, the front end of the upper flip-fixing adjustment plate 13-2 is provided with a notch 13-2-2 that is compatible with the door opening rotation shaft 10. During installation, the two ends of the door opening rotation shaft 10 are respectively placed in the notches 13-2-2 at the corresponding positions, and bearing seats 14 are installed on the two ends of the door opening rotation shaft 10 and the outer side of the upper flip-fixing adjustment plate 13-2. The door opening rotation shaft 10 is fixed in the notch 13-2-2 by the bearing seats 14 to prevent the door opening rotation shaft 10 from falling out of the notch 13-2-2.

[0042] In this embodiment, the mounting bracket 13 is provided with a motor fixing block 15 (specifically, one of the upper flip-fixing adjustment plates 13-2 is provided with a motor fixing block 15). The output end of the drive motor 3 passes through the motor fixing block 15 and is connected to the push wheel 5, which enhances the installation stability of the drive motor 3.

[0043] In this embodiment, a spring adjusting screw 16 is horizontally inserted through the upper end of the mounting bracket 13. The front end of the spring adjusting screw 16 passes through the mounting bracket 13 and is connected to the tension spring connector 7. A hand-tightening nut 17 is provided at the intersection of the spring adjusting screw 16 and the mounting bracket 13. Specifically, in the mounting bracket 13, the upper middle part of the flip connecting plate 13-3 is provided with a screw through hole 13-3-1 through which the spring adjusting screw 16 can pass. During installation, the front end of the spring adjusting screw 16 is passed through the screw through hole 13-3-1 and connected to the tension spring connector 7, and the spring adjusting screw 16 is tightened by hand-tightening the nut 17. When in use, loosen the hand-tightening nut 17, move the spring adjusting screw 16 back and forth along the screw through hole 13-3-1, and when it is moved to the appropriate position, tighten the hand-tightening nut 17. In this way, the spring adjusting screw 16 can be moved back and forth, which in turn drives the tension spring connecting piece 7 to move back and forth, thereby adjusting the tension of the tension spring 6 to ensure that the silo door is more secure when closed, and that the door panel 2 and the discharge port 1-1 of the silo 1 can fit tightly together. Figure 1 The torsion spring 7 in the existing silo door structure ， The tension of the torsion spring is not adjustable; after prolonged use, the tension will decrease. ， It easily loses its elasticity, causing the door panel 2 ， The door is loosely closed; door panel 2 ， With silo 1 ， There is a gap between the discharge port. In this embodiment, the tension of the tension spring 6 can be adjusted by setting the spring adjusting screw 16 and the hand-tightening nut 17. After long-term use, it can ensure that the door panel 2 is closed tightly and also extend the service life of the tension spring 6.

[0044] In addition, among the two upper flip-fixed adjustment plates 13-2 of the mounting bracket 13, the outer side of the upper flip-fixed adjustment plate 13-2 away from the drive motor 3 is equipped with a flip detection support plate 18, and a photoelectric switch 12 corresponding to the door opening detection plate 11 is installed on the side of the flip detection support plate 18 facing the door opening detection plate 11.

[0045] In this embodiment, see Figure 2 As shown, the silo door structure includes a horizontally arranged support base plate 19 and a silo mounting plate 20 horizontally arranged above the support base plate 19. Support columns 21 are vertically connected between the four corners of the support base plate 19 and the silo mounting plate 20. The silo 1 is mounted on the silo mounting plate 20, and the mounting frame 13 is located on the support base plate 19 and below the silo mounting plate 20. The support base plate 19, the silo mounting plate 20, and the support columns 21 together constitute a support mechanism, providing support and fixation for the relevant components of the silo door structure. Furthermore, in conjunction with... Figure 2 and Figure 9 As shown, the top surface of the support base plate 19 corresponds to the position of the downward flip-up fixing adjustment plate 13-1 of the mounting bracket 13, and is provided along the front-back direction (i.e., Figure 2 A sliding groove 19-1 extending in the left-right direction is provided. The bottom of the downward flipping and fixing adjustment plate 13-1 is slidably disposed in the sliding groove 19-1. Several elongated holes 19-2 are vertically provided in the sliding groove 19-1. During installation, the bottom of the downward flipping and fixing adjustment plate 13-1 is placed into the sliding groove 19-1. The downward flipping and fixing adjustment plate 13-1 is moved left and right. After it is moved to a suitable position, fasteners (known technology, omitted in the figure) are passed through the elongated holes 19-2 to fasten the downward flipping and fixing adjustment plate 13-1 and the support base plate 19. This fastens the mounting frame 13 to the downward flipping and fixing adjustment plate 13-1, thereby allowing the mounting frame 13 to be adjusted left and right. This allows the components installed on the mounting frame 13 to be adjusted left and right, and the door panel 2 to be adjusted left and right. This further ensures that the door panel 2 fits tightly with the discharge port 1-1 of the hopper 1.

[0046] The method of using the hopper door structure for a pellet counter described in this utility model is as follows:

[0047] The hopper door structure is installed in the counting machine. Before the hopper 1 collects the material, the door panel 2 is tightly fitted with the discharge port 1-1 of the hopper 1. The hopper door is closed, and the material falls into the hopper 1 under the action of the feeding mechanism. The hopper 1 collects the material, and the counting mechanism counts the material in the hopper 1. When the material quantity reaches the preset value, the material stops falling, the drive motor 3 rotates forward, the drive motor 3 drives the push wheel 5 to rotate, the push wheel 5 pushes the door opening connector 4 to rotate, and the door opening connector 4 drives the door panel 2 to rotate clockwise. When the door panel 2 separates from the discharge port 1-1 of the hopper 1, the hopper door opens, and the material in the hopper 1 begins to fall. After the material falls, the drive motor 3 reverses, the push wheel 5 reverses, and the door opening connector 4 and the door panel 2 begin to rotate counterclockwise under the tension of the tension spring 6. During this process, the push wheel 5 and the door opening connector 4 are always in contact. The door panel 2 contacts the hopper 1 until the door panel 2 and the discharge port 1-1 of the hopper 1 are tightly fitted. The hopper door closes, and the hopper 1 continues to collect material. This cycle repeats for counting and packaging.

[0048] The silo door structure of this utility model is similar to... Figure 1 Compared to the existing hopper door structure in the pellet counting machine shown:

[0049] 1) In the existing pellet counting machine, the hopper door structure is as follows: hopper 1 ， Bottom discharge port 1-1 ， Because it is a flat opening, when the warehouse door is closed, door panel 2... ， The material is in a horizontal state, causing silo 1 to... ， When collecting materials, the materials come into contact with door panel 2. ， Sometimes the material will pop up, causing duplicate counting and affecting counting accuracy. In addition, the flat-mouth discharge port 1-1 ， This also caused the door panel 2 to... ， The opening angle is small, making it difficult for materials to fall, thus making the door panel 2 ， It is easy for material to stick to the surface;

[0050] In this embodiment, the discharge port 1-1 of the hopper 1 is angled. When the hopper door is closed, the door panel 2 has a certain angle with the horizontal plane. When the hopper 1 collects materials, the materials fall into the hopper 1 and contact the door panel 2 at the bottom of the hopper 1 without popping vertically upwards out of the hopper 1, thus avoiding duplicate counting and achieving high counting accuracy. In addition, the discharge port 1-1 allows the door panel 2 to open at a large angle when the hopper door of the hopper 1 is opened in this embodiment, making it easier for materials to fall and thus making it less likely for materials to stick to the door panel 2.

[0051] 2) In the existing pellet counting machine's hopper door structure, the discharge port 1-1 ， Because it is flush with the outside, the door panel 2... ， The angle of motion is larger than that of the door panel 2 in this embodiment. Taking an angle α of 35° between the discharge port 1-1 and the horizontal plane as an example... Figure 1 Door panel 2 ， When the door is closed, it is in a horizontal position; when the door is open, door panel 2... ， It needs to be rotated to a 45° angle, meaning that during the opening and closing of the door, door panel 2... ， The required angle of movement is 45°; in this embodiment, the door panel 2 is at 35° when the door is closed, and needs to rotate to a 60° angle when the door is opened. That is, during the opening and closing of the door, the angle of movement of the door panel 2 is 25°, which is much lower than the required angle of movement of the door panel 2. ， The angle of motion corresponds to the number of rotations of drive motor 3 being much lower than that of drive motor 3. ， The number of rotations of push wheel 5 is much lower than the stroke of push wheel 5. ， The movement stroke of the push wheel 5 ensures that, in this embodiment, the push wheel 5 and the door opening connector 4 remain in contact throughout one door opening and closing cycle. Therefore, compared to... Figure 1 In the existing silo door structure, the pusher wheel 5 ， Connector 4 to the door ， In terms of the intermittent contact and separation, the noise between the push wheel 5 and the door opening connector 4 in this utility model is small, thus the overall noise of the equipment during the opening and closing of the door is small;

[0052] Furthermore, because the stroke of pusher 5 is much shorter than that of pusher 5 ， The movement stroke is such that, therefore, in this embodiment, the stretching distance of the tension spring 6 in the silo door structure is greater than... Figure 1 In the existing silo door structure of Zhongzhong, there are 7 torsion springs. ， The short torsion distance results in a longer service life for the tension spring 6 and a lower number of replacement cycles.

[0053] 3) In the existing pellet counting machine's hopper door structure, door panel 2 ， It is in torsion spring 7 ， Driven by tension and hopper 1 ， The discharge port is clamped, and a torsion spring 7 is used. ， It is prone to deformation and loses its elasticity with long-term use, leading to door panel 2 ， The door is loosely closed; door panel 2 ， With silo 1 ， There is a gap between the discharge ports; in the silo door structure of this embodiment, the door panel 2 is tightly fitted to the discharge port 1-1 of the silo 1 under the tension of the tension spring 6, and the spring 6 is relatively stronger than the torsion spring 7. ， In terms of stability, it is not prone to deformation or loosening. Even if spring 6 becomes loose after long-term use, it does not need to be scrapped. Instead, spring 6 can be tightened again by adjusting the distance between the tension spring connector 7 and the door opening connector 4. Meanwhile, torsion spring 7... ，Once it becomes loose, it has to be scrapped and replaced with a new torsion spring. ， Therefore, the service life of spring 6 in this embodiment is longer than that of torsion spring 7. ， It has a longer lifespan, requires fewer replacements, has better overall equipment stability, and a longer overall service life.

[0054] Finally, it should be pointed out that the above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the protection scope of the present utility model.

Claims

1. A hopper door structure for a pellet counting machine, comprising a hopper, a door panel, and a drive motor, wherein an opening connector is connected to the upper end of the door panel, and a push wheel is connected to the output end of the drive motor, characterized in that: The push wheel contacts the side of the door connector away from the hopper. A tension spring and a tension spring connector are horizontally arranged above the push wheel. The front end of the tension spring is connected to the door connector, and the rear end of the tension spring is connected to the tension spring connector. Furthermore, the discharge port at the bottom of the hopper is a sloping opening that is inclined forward and downward.

2. The hopper door structure for a pellet counter according to claim 1, characterized in that: The output end of the drive motor is connected to a door-opening rotating component, and the push wheel is mounted on the door-opening rotating component.

3. The hopper door structure for a pellet counter according to claim 1, characterized in that: The rear side of the door connector is provided with a flip-up wear-resistant plate, and the push wheel is in contact with the flip-up wear-resistant plate.

4. The hopper door structure for a pellet counter according to claim 1, characterized in that: The front side of the door opening connector is connected to a door opening rotating shaft that can rotate horizontally. One end of the door opening rotating shaft is provided with a door opening detection plate, and a photoelectric switch is provided on the side of the door opening detection plate.

5. The hopper door structure for a pellet counter according to claim 1, characterized in that: The device includes a mounting bracket, on which the drive motor and tension spring connector are both mounted.

6. The hopper door structure for a pellet counter according to claim 5, characterized in that: A spring adjusting screw is horizontally inserted through the upper end of the mounting bracket. The front end of the spring adjusting screw passes through the mounting bracket and is connected to the tension spring connector. A hand-tightening nut is provided at the intersection of the spring adjusting screw and the mounting bracket.

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