A servo cylinder feeding mechanism

Abstract

The utility model is specifically related to a kind of servo electric cylinder feeding mechanism, solve existing cylinder feeding mechanism when fine powder material feeding, sealing is difficult, it is prone to cause the problem of material leakage and the transmission shaft stress of servo motor feeding mechanism, the utility model uses servo electric cylinder as power source, its speed is faster, precision is higher, when coarse feeding, the movable end of servo electric cylinder drives arc plate rotation, completely open lower discharge port, so that material falls quickly, subsequently servo electric cylinder drives arc plate to close lower discharge port, according to the weight difference measured by gravity sensor, external control unit controls servo electric cylinder accurately controls lower discharge port opening size, when reaching specified weight, servo electric cylinder drives arc plate to close lower discharge port, complete fine feeding;While the movable end of servo electric cylinder is directly connected with arc plate, rotation shaft only limits arc plate rotation track, does not need to drive arc plate rotation, reduce the stress of rotation shaft, and realize coarse, fine feeding using an arc plate, sealing property is guaranteed.

Description

Technical Field

[0001] This utility model relates to a feeding mechanism, specifically a servo electric cylinder feeding mechanism. Background Technology

[0002] In packaging machinery, for granular or powdery materials, a feeding mechanism and a packaging mechanism are generally used in conjunction to package the products. The working principle is as follows: the granular or powdery material is poured into the feeding mechanism, and the storage bin of the feeding mechanism is responsible for storing the granular or powdery material. When the packaging mechanism delivers the packaging bag to the discharge port of the storage bin, the control unit controls the coarse feeding gate assembly set at the discharge port to work, opening the discharge port of the storage bin. The granular or powdery material falls into the packaging bag from the discharge port. After the set time, the coarse feeding gate assembly closes the discharge port. The gravity sensor set on the packaging mechanism weighs the material in the packaging bag and then transmits the measured weight deviation to the control unit. The control unit controls the fine feeding gate assembly set at the discharge port to work, precisely controlling the opening size of the discharge port to accurately replenish the material in the packaging bag until the specified weight is reached. After a single feeding is completed, the discharge port is closed, the packaging mechanism packs the packaging bag and sends it to the next station, and sends a new packaging bag to the discharge port for a new round of feeding.

[0003] Currently, the commonly used feeding mechanism is usually a cylinder feeding mechanism that uses a cylinder as a power source, and its structure is as follows: Figure 1 As shown, cylinders use gas as their medium, which is compressible, so their precision and speed are not high. In order to achieve rapid coarse feeding and precise fine feeding, two sets of cylinders are usually used to control the two processes respectively. The specific method is: the coarse feeding cylinder 01 controls the opening and closing of the coarse feeding gate 03 with a large area, and the fine feeding cylinder 02 controls the opening and closing of the fine feeding gate 04 with a small area. For fine powder materials, especially fine powder materials with good flowability, the fine feeding gate 04 is difficult to seal, which can easily lead to material leakage.

[0004] Therefore, a servo motor feeding mechanism using a single-arc gate to achieve coarse and fine feeding was developed, with the structure as follows: Figure 2 As shown, its power source adopts a structure of servo motor 05 + reducer 06. The output end of reducer 06 drives the drive shaft, which is rotatably installed in the storage hopper 07, to rotate, thereby driving the arc gate 08, which is fixed to the drive shaft, to open and close. Compared with cylinder, servo motor 05 has higher operating precision, and the use of a single arc gate 08 to control the opening and closing of the material discharge port of storage hopper 07 can also better ensure sealing. However, the drive shaft needs to withstand a lot of force during frequent rotation. Utility Model Content

[0005] The purpose of this invention is to solve the technical problems of existing cylinder feeding mechanisms, such as difficulty in sealing when feeding fine powder materials, which easily leads to material leakage, and the high force on the transmission shaft of servo motor feeding mechanisms, and to provide a servo electric cylinder feeding mechanism.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A servo electric cylinder feeding mechanism, characterized by:

[0008] Includes a hopper, servo electric cylinder, feeding arc gate assembly, and rotating shaft;

[0009] The top and bottom of the hopper are provided with an upper inlet and a lower outlet;

[0010] The rotating shaft has two shafts, which are respectively located in the opposite mounting blind holes on the side wall of the hopper. The two shafts are rotatably connected to the two mounting blind holes respectively.

[0011] The feeding arc gate assembly includes an arc plate connected to a rotating shaft. The projection of the lower outer edge of the lower discharge port onto a plane perpendicular to the rotating shaft is an arc shape, and the axis of the rotating shaft coincides with the center line of the arc-shaped outer edge of the lower discharge port. The arc plate is positioned at the lower discharge port and its shape is adapted to the lower outer edge of the lower discharge port to block the lower discharge port.

[0012] A connecting frame is connected to one side wall of the hopper. The tail end of the servo electric cylinder is hinged to the connecting frame, and the movable end is hinged to the arc plate, which is used to drive the arc plate to rotate around the rotating shaft.

[0013] The control terminal of the servo electric cylinder is used to connect to an external control unit.

[0014] Furthermore, a fine feeding notch is provided on the side of the arc plate near or away from the connecting frame. The fine feeding notch is provided such that when the arc plate completely blocks the lower discharge port, the fine feeding notch is located outside the lower discharge port.

[0015] Furthermore, the feeding arc gate assembly also includes a connecting rod;

[0016] There are two connecting rods, which are respectively set at both ends of the arc plate and located on the outer side of the hopper sidewall. The two connecting rods are fixedly connected to the arc plate. Each connecting rod has a lower clamping block at its upper end. The outer wall of the end of the rotating shaft has a positioning groove along the circumference. The top of the lower clamping block has a groove that matches the positioning groove. The top of the lower clamping block is connected to an upper clamping block by bolts. The bottom of the upper clamping block has a groove that matches the positioning groove. The rotating shaft is clamped by bolting the upper clamping block and the lower clamping block, thereby connecting the two connecting rods to the rotating shaft respectively. The positioning groove and the groove cooperate to restrict the movement of the upper clamping block and the lower clamping block along the axial direction of the rotating shaft.

[0017] Furthermore, the feeding arc gate assembly also includes a side plate;

[0018] There are two side plates, which are respectively set at both ends of the arc plate and located on the outside of the side wall of the hopper. The lower end of the side plate is connected to the arc plate, and two connecting rods are fixedly connected to the two side plates respectively.

[0019] Furthermore, there are two servo electric cylinders, each servo electric cylinder including a power unit and an execution unit. The power unit is a first servo motor, and the execution unit is a ball screw pair. The output end of the first servo motor is connected to the input end of the ball screw pair.

[0020] A first fixed shaft is provided on the outer side wall of each of the two connecting rods, and a second fixed shaft is provided on the connecting frame. The axes of the first fixed shaft and the second fixed shaft are both parallel to the axis of the rotating shaft.

[0021] Two ball screw pairs are respectively mounted on two housings, and the two housings are respectively hinged to the two ends of the second fixed shaft. The output ends of the two ball screw pairs are respectively hinged to the two first fixed shafts. The output ends of the ball screw pairs constitute the moving ends of the servo electric cylinder.

[0022] Furthermore, a baffle plate is provided on the side of the lower discharge port near the second fixed shaft, and the baffle plate is connected to the connecting frame.

[0023] Furthermore, a flange is provided on the top of the hopper, which is used to connect the filter cloth.

[0024] Furthermore, a dust removal pipe is provided on the flange, with the lower end of the dust removal pipe located on the lower side of the flange and the upper end of the dust removal pipe used to connect to an external dust collector.

[0025] Compared with the prior art, the beneficial effects of this utility model are:

[0026] (1) The servo electric cylinder feeding mechanism provided by this utility model uses a servo electric cylinder as a power source. Compared with the traditional cylinder, it is faster and more accurate. When coarse feeding is required, the moving end of the servo electric cylinder drives the arc plate to rotate, which fully opens the lower discharge port of the hopper, allowing the material to fall quickly. After coarse feeding is completed, the servo electric cylinder drives the arc plate to close the lower discharge port. According to the weight difference measured by the gravity sensor set on the packaging mechanism, the external control unit controls the servo electric cylinder to precisely control the opening size of the lower discharge port. When the specified weight is reached, the servo electric cylinder drives the arc plate to close the lower discharge port, completing fine feeding. The moving end of the servo electric cylinder is directly connected to the arc plate. The rotating shaft only restricts the rotation trajectory of the arc plate and does not need to drive the arc plate to rotate, which reduces the force on the rotating shaft. Furthermore, the use of one arc plate to achieve coarse and fine feeding ensures the sealing performance.

[0027] (2) The servo electric cylinder feeding mechanism provided by this utility model has a fine feeding notch on the side of the arc plate near or away from the connecting frame. In this way, the weight of the material falling can be controlled more accurately when feeding fine material. The execution unit of the servo electric cylinder is a ball screw pair, and the power unit adopts a servo motor with higher running accuracy. The combination of the two makes the efficiency and accuracy higher, and the opening of the lower discharge port can be controlled more accurately when feeding coarse and fine material.

[0028] (3) The servo electric cylinder feeding mechanism provided by this utility model has a baffle plate on the side of the lower discharge port near the second fixed shaft. When the arc plate closes the lower discharge port, the falling material will be subjected to the tangential force of the arc plate and thus splash to the outside. Therefore, the baffle plate is set to block the material from splashing.

[0029] (4) The servo electric cylinder feeding mechanism provided by this utility model has a flange on the top of the hopper. The flange is used to connect the filter cloth. The filter cloth will cover all the components located below the flange to prevent dust from overflowing when the lower discharge port is opened. A dust removal pipe is also provided on the flange. The lower end of the dust removal pipe is located on the lower side of the flange, while the upper end of the dust removal pipe is used to connect to an external dust collector. The dust in the filter cloth is removed by the external dust collector to protect the on-site environment. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the existing cylinder feeding mechanism;

[0031] Figure 2 A schematic diagram of the existing servo motor feeding mechanism;

[0032] Figure 3 This is a three-dimensional structural diagram of an embodiment of a servo electric cylinder feeding mechanism of the present invention. Figure 1 ;

[0033] Figure 4 This is a three-dimensional structural diagram of an embodiment of the present utility model. Figure 2 ;

[0034] Figure 5 This is a three-dimensional structural diagram of an embodiment of the present utility model. Figure 3 (The servo cylinder, shaft, and feeding arc gate assembly are not shown);

[0035] Figure 6 for Figure 3 The front view;

[0036] Figure 7 for Figure 6 Sectional view along axis AA (rotation axis not shown);

[0037] Figure 8 This is a three-dimensional structural diagram of the feeding arc gate assembly in an embodiment of this utility model (the upper clamping block is not shown).

[0038] The annotations in the attached figures are explained as follows:

[0039] 01-Coarse feeding cylinder, 02-Fine feeding cylinder, 03-Coarse feeding gate, 04-Fine feeding gate, 05-Servo motor, 06-Reducer, 07-Storage hopper, 08-Arc gate;

[0040] 1-Blouse; 2-Servo cylinder; 21-First servo motor; 22-Ball screw pair; 3-Feeding arc gate assembly; 31-Arc plate; 311-Fine feeding notch; 32-Side plate; 33-Connecting rod; 331-First fixed shaft; 34-Lower clamping block; 35-Upper clamping block; 4-Rotating shaft; 5-Flange; 6-Dust removal pipe; 7-Connecting frame; 71-Second fixed shaft; 8-Baffle plate. Detailed Implementation

[0041] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0042] Reference Figures 3-8 The servo electric cylinder feeding mechanism of this utility model includes a hopper 1, a servo electric cylinder 2, a feeding arc gate assembly 3, and a rotating shaft 4. The structure of the hopper 1 is as follows: Figure 2 As shown, the top of the hopper has an upper feed inlet, and the bottom has a lower discharge outlet. Material is poured into the hopper 1 through the upper feed inlet, and the lower discharge outlet is closed by the feeding arc gate assembly 3, allowing the material to be temporarily stored in the hopper 2 for easy feeding of packaging bags. There are two rotating shafts 4, which are respectively located in the mounting blind holes opposite to each other on the side wall of the hopper 1. The two rotating shafts 4 are rotatably connected to the two mounting holes respectively, without affecting the material discharge of the hopper 1.

[0043] Feeding arc gate component 3 Figure 8As shown, the device includes an arc plate 31, which is connected to the rotating shaft 4 via a connecting rod 33. The projection of the lower outer edge of the lower discharge port onto a plane perpendicular to the rotating shaft 4 is an arc shape, and the axis of the rotating shaft 4 coincides with the center line of the arc-shaped outer edge of the lower discharge port. The arc plate 31 is positioned at the lower discharge port, and its shape is adapted to the lower outer edge of the lower discharge port to seal the lower discharge port. There are two connecting rods 33, which are respectively located at both ends of the arc plate 31 and on the outer side of the side wall of the hopper 1. The two connecting rods 33 are fixedly connected to the arc plate 31. In order to connect the connecting rods 33 to the rotating shaft 4, this embodiment uses an upper clamping block 35 and a lower clamping block 34 to cooperate, that is, a lower clamping block 34 is provided at the upper end of each connecting rod 33. The clamping block 34 has a positioning groove on the outer wall of the end of the rotating shaft 4 along the circumference. The top of the lower clamping block 34 has a groove that matches the positioning groove. The top of the lower clamping block 34 is bolted to the upper clamping block 35. The bottom of the upper clamping block 35 has a groove that matches the positioning groove. The rotating shaft 4 is clamped by bolting the upper clamping block 35 and the lower clamping block 34, thereby connecting the two connecting rods 33 to the rotating shaft 4 respectively. The positioning groove and the groove cooperate to restrict the movement of the upper clamping block 35 and the lower clamping block 34 along the axial direction of the rotating shaft 4. Compared with the connection method of directly fixing the connecting rods 33 to the rotating shaft 4, when the rotating shaft 4 or the feeding arc gate assembly 3 needs to be replaced, the bolts connecting the upper clamping block 35 and the lower clamping block 34 can be loosened. The structure is simple and the operation is convenient.

[0044] To prevent material from leaking out from both ends of the arc plate 31, the feeding arc gate assembly 3 also includes side plates 32. There are two side plates 32, which are respectively set at both ends of the arc plate 31. Both side plates 32 are located on the outer side of the side wall of the hopper 1. The lower end of the side plate 32 is connected to the arc plate 31, and the two connecting rods 33 are respectively fixedly connected to the two side plates 32.

[0045] A connecting frame 7 is connected to the side wall of one side of the hopper 1. A second fixed shaft 71 is set on the connecting frame 7. In order to ensure that the arc plate 31 is subjected to uniform force when rotating, two servo electric cylinders 2 are provided. The tail ends of the two servo electric cylinders 2 are respectively hinged to the two ends of the second fixed shaft 71. A first fixed shaft 331 is set on the outer side wall of the two connecting rods 33. The movable ends of the two servo electric cylinders 2 are respectively hinged to the two first fixed shafts 331, and the axes of the first fixed shafts 331 and the second fixed shafts 71 are parallel to the axis of the rotating shaft 4. In this way, the servo electric cylinders 2 can drive the arc plate 31 to rotate around the rotating shaft 4, thereby realizing the opening and closing of the lower discharge port.

[0046] Each servo electric cylinder 2 includes a power unit and an execution unit. The power unit is a first servo motor 21, and the execution unit is a ball screw pair 22. The two ball screw pairs 22 are respectively mounted on two housings, and the two housings are respectively hinged to the two ends of the second fixed shaft 71. The output ends of the two ball screw pairs 22 are respectively hinged to the two first fixed shafts 331. The output ends of the ball screw pairs 22 constitute the moving ends of the servo electric cylinder 2.

[0047] The control end of the servo cylinder 2 is electrically connected to the external control unit, and the input end of the external control unit is electrically connected to the output end of the gravity sensor on the packaging mechanism. In this embodiment, the control end of the first servo motor 21 is electrically connected to the external control unit, so that the stroke and action time of the moving end of the servo cylinder 2 during the coarse feeding process and the fine feeding process can be controlled by the external control unit.

[0048] To more accurately control the weight of material falling into the packaging bag from the lower outlet during the fine feeding process, a fine feeding notch 311 is provided on the side of the arc plate 31 near or away from the connecting frame 7. The fine feeding notch 311 is positioned such that when the arc plate 31 completely blocks the lower outlet, the fine feeding notch 311 is located outside the lower outlet. In this embodiment, the fine feeding notch 311 is located on the side of the arc plate 31 near the connecting frame 7. After the coarse feeding process is completed, the material will not leak out from the fine feeding notch 311 after the arc plate 31 completely blocks the lower outlet. When the fine feeding process is performed, the moving end of the servo electric cylinder 2 only needs to move a very short stroke to allow the material to fall from the fine feeding notch 311, making it easier to control the weight of the material. If the fine feeding notch 311 is not provided, the opening degree of the lower outlet cannot be accurately controlled by the arc plate 31.

[0049] When feeding is completed, the movable end of the servo cylinder 2 retracts, driving the arc plate 31 to close the lower discharge port. At this time, the falling material will be subjected to the tangential force provided by the arc plate 31 and splash to the outside. Therefore, a baffle plate 8 is provided on the side of the lower discharge port near the second fixed shaft 71. The splashed material will be blocked by the baffle plate 8. The baffle plate 8 is connected to the connecting frame 7 to fix its position.

[0050] During the use of the feeding mechanism, dust will be raised when the lower discharge port is opened. Therefore, a flange 5 is provided on the top of the hopper 1. The flange 5 is used to connect the filter cloth. In this embodiment, the flange 5 is connected to the filter cloth through its outer circumference. The filter cloth will cover all the components located below the flange 5 to prevent dust from overflowing. A dust removal pipe 6 is also provided on the flange 5. The lower end of the dust removal pipe 6 is located on the lower side of the flange 5, and the upper end of the dust removal pipe 6 is connected to an external dust collector. The dust inside the filter cloth is extracted by the external dust collector to protect the on-site environment.

[0051] In use, granular or powdered materials are poured into the upper feed port of the hopper 1. The external control unit controls the servo cylinder 2 to start, and its movable end drives the arc plate 31 to rotate, fully opening the lower discharge port. The material falls from the lower discharge port into the packaging bag below. After the set time, the movable end of the servo cylinder 2 drives the arc plate 31 to close the lower discharge port. The gravity sensor set on the packaging mechanism weighs the material in the packaging bag and then transmits the measured weight deviation to the external control unit. The external control unit controls the movable end of the servo cylinder 2 to rotate the arc plate 31, and the material falls into the packaging bag through the fine feeding notch 311, accurately replenishing the material in the packaging bag to the specified weight, thus completing the feeding.

[0052] The embodiments described above are merely descriptions of specific implementations of this utility model and are not intended to limit the scope of this utility model. Various modifications and improvements made to the technical solutions of this utility model by those skilled in the art without departing from the spirit of this utility model should fall within the protection scope defined by the claims of this utility model.

Claims

1. A servo electric cylinder feeding mechanism, characterized in that: It includes a hopper (1), a servo electric cylinder (2), a feeding arc gate assembly (3), and a rotating shaft (4); The top and bottom of the silo (1) are provided with an upper inlet and a lower outlet; The rotating shaft (4) has two shafts, which are respectively located in the mounting blind holes arranged opposite to each other on the side wall of the hopper (1). The two shafts (4) are rotatably connected to the two mounting blind holes respectively. The feeding arc gate assembly (3) includes an arc plate (31) connected to the rotating shaft (4). The projection of the lower outer edge of the lower discharge port onto a plane perpendicular to the rotating shaft (4) is an arc shape, and the axis of the rotating shaft (4) coincides with the center line of the arc-shaped outer edge of the lower discharge port. The arc plate (31) is located at the lower discharge port, and the shape of the arc plate (31) is adapted to the lower outer edge of the lower discharge port to block the lower discharge port. A connecting frame (7) is connected to one side wall of the hopper (1). The tail end of the servo electric cylinder (2) is hinged to the connecting frame (7), and the movable end is hinged to the arc plate (31) to drive the arc plate (31) to rotate around the rotating shaft (4). The control terminal of the servo electric cylinder (2) is used to connect to an external control unit.

2. The servo electric cylinder feeding mechanism according to claim 1, characterized in that: The arc plate (31) is provided with a fine feeding notch (311) on the side close to or far from the connecting frame (7). The fine feeding notch (311) is provided to satisfy the following condition: when the arc plate (31) completely blocks the lower discharge port, the fine feeding notch (311) is located outside the lower discharge port.

3. The servo electric cylinder feeding mechanism according to claim 2, characterized in that: The feeding arc gate assembly (3) also includes a connecting rod (33); There are two connecting rods (33). The two connecting rods (33) are respectively set at both ends of the arc plate (31) and located on the outside of the side wall of the hopper (1). The two connecting rods (33) are fixedly connected to the arc plate (31). Each connecting rod (33) has a lower clamping block (34) at its upper end. The outer wall of the end of the rotating shaft (4) is provided with a positioning groove along the circumferential direction. The top of the lower clamping block (34) is provided with a groove that matches the positioning groove. The top of the lower clamping block (34) is connected to the upper clamping block (35) by bolts. The bottom of the upper clamping block (35) is provided with a groove that matches the positioning groove. The rotating shaft (4) is clamped by bolting the upper clamping block (35) and the lower clamping block (34), thereby connecting the two connecting rods (33) to the rotating shaft (4) respectively. The positioning groove and the groove cooperate to restrict the movement of the upper clamping block (35) and the lower clamping block (34) along the axial direction of the rotating shaft (4).

4. The servo electric cylinder feeding mechanism according to claim 3, characterized in that: The feeding arc gate assembly (3) also includes a side plate (32); There are two side plates (32). The two side plates (32) are respectively set at both ends of the arc plate (31) and located on the outside of the side wall of the hopper (1). The lower end of the side plate (32) is connected to the arc plate (31), and the two connecting rods (33) are respectively fixedly connected to the two side plates (32).

5. The servo electric cylinder feeding mechanism according to claim 4, characterized in that: Two servo electric cylinders (2) are provided. Each servo electric cylinder (2) includes a power unit and an execution unit. The power unit is a first servo motor (21), and the execution unit is a ball screw pair (22). The output end of the first servo motor (21) is connected to the input end of the ball screw pair (22). The outer side walls of the two connecting rods (33) are respectively provided with a first fixed shaft (331), and the connecting frame (7) is provided with a second fixed shaft (71). The axes of the first fixed shaft (331) and the second fixed shaft (71) are parallel to the axis of the rotating shaft (4). Two ball screw pairs (22) are respectively mounted on two housings, and the two housings are respectively hinged to the two ends of the second fixed shaft (71). The output ends of the two ball screw pairs (22) are respectively hinged to the two first fixed shafts (331). The output ends of the ball screw pairs (22) constitute the moving end of the servo electric cylinder (2).

6. The servo electric cylinder feeding mechanism according to claim 5, characterized in that: A baffle plate (8) is provided on the side of the lower discharge port near the second fixed shaft (71), and the baffle plate (8) is connected to the connecting frame (7).

7. The servo electric cylinder feeding mechanism according to claim 1, characterized in that: The top of the hopper (1) is provided with a flange (5), which is used to connect the filter cloth.

8. The servo electric cylinder feeding mechanism according to claim 7, characterized in that: A dust removal pipe (6) is provided on the flange (5). The lower end of the dust removal pipe (6) is located on the lower side of the flange (5), and the upper end of the dust removal pipe (6) is used to connect to an external dust collector.

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