Combined piano scale

Abstract

The utility model provides a combined piano scale, which comprises a rack, a weighing assembly and a discharging conveying belt are arranged on the rack, the weighing assembly comprises a plurality of weighing hoppers, a feeding assembly and a feeding assembly are further arranged on the rack, the feeding assembly comprises a vibration charging tray, and the vibration charging tray receives materials fed from the outside; the feeding assembly comprises a plurality of material guiding grooves and a material blocking and placing part, the vibration material disc is in butt joint with the multiple material guiding grooves and used for dispersing materials stacked on the vibration material disc to enter the material guiding grooves one by one, and each material guiding groove is in butt joint with one weighing hopper; and each material guide groove is provided with a material blocking and placing piece. Materials on the feeding assembly are dispersed through a vibration material disc of the feeding assembly, the vibration material disc vibrates the materials into a material guiding groove one by one, the materials are controlled to enter a weighing hopper one by one through the material guiding groove and a material blocking and discharging piece on the material guiding groove, and the problem that due to the fact that too much materials are fed into a certain hopper, the materials are difficult to accurately match the proper weight is solved; therefore, the multiple hoppers can accurately match the materials with the required weight and output the materials.

Description

Technical Field

[0001] The utility model relates to the technical field of weighing equipment, in particular to a combined piano scale. Background Art

[0002] With the continuous development of agricultural technology, the improvement of residents' consumption level and the increasing attention paid to health, the consumption of products such as fruits and vegetables has continued to grow. The traditional manual weighing method using electronic scales is inefficient and cannot meet the needs of large-scale production. In order to solve the above problems, some piano scales have appeared on the market as an automatic weighing device. It usually has multiple weighing hoppers. Through the components of multiple weighing hoppers, fruits and vegetables of appropriate weight are weighed out for packaging. However, in the process of feeding and weighing, it cannot guarantee that each hopper can feed. Some hoppers have a fast feeding speed (multiple fruits and vegetables are fed at a time), and some hoppers have a low feeding speed (only one or two fruits and vegetables are fed in a period of time), and the quality of the combined weighing cannot be accurately controlled. Utility Model Content

[0003] To solve the above problems, the purpose of the utility model is to provide a combined piano scale.

[0004] The utility model is realized by the following method: a combined piano scale comprises a frame, on which a weighing assembly and a discharging conveyor belt are arranged, the weighing assembly comprises a plurality of weighing hoppers, the discharging conveyor belt is used to receive the weighed materials outputted from the weighing hoppers, the frame is also provided with a feeding assembly and a supply assembly, the feeding assembly comprises a vibrating material tray, the vibrating material tray receives the materials fed from the outside; the supply assembly comprises a plurality of guide troughs and a material blocking member, the vibrating material tray is docked with a plurality of guide troughs, the vibrating material tray is used to spread the materials stacked thereon and enter the guide troughs one by one, each of the guide troughs is docked with a weighing hopper; each of the guide troughs is provided with a material blocking member, which is used to control the materials passing through the guide trough so as to control the amount of materials entering the weighing hopper.

[0005] Preferably, the feeding assembly also includes a first brush roller mounted above the vibrating material tray for shock absorption and buffering; a second brush roller is mounted at the junction of the vibrating material tray and the material guide trough for pushing the material into the material guide trough, and the first brush roller and the second brush roller are driven by a motor.

[0006] Preferably, a vibration generator is provided on the lower side of each of the material guide troughs for vibrating the material guide trough to drive the material on the material guide trough to move toward the weighing hopper.

[0007] Preferably, a plurality of the material guide troughs are arranged side by side, and the material blocking member includes a fixed frame and baffles corresponding to the number of the material guide troughs, the fixed frame is mounted above the material guide trough, and the plurality of baffles are respectively hinged on the fixed frame, each of the baffles is hinged to a first cylinder, and the other end of the first cylinder is hinged to the fixed frame.

[0008] Preferably, a material discharge assembly is provided at the end of the discharge conveyor belt, and the material discharge assembly includes a discharge hopper, the inlet end of the discharge hopper is connected to the discharge conveyor belt, and the outlet at the lower end of the discharge hopper is provided with an opening and closing member.

[0009] Preferably, the opening and closing part includes an opening and closing plate and a second cylinder, the two opening and closing plates are symmetrically hinged on both sides of the outlet at the lower end of the discharging hopper, and two second cylinders are installed on the outer surface of the discharging hopper. The two second cylinders are respectively hinged to the opening and closing plates on the same side thereof, the second cylinder pushes out the opening and closing plate to open the outlet, and the second cylinder retracts the opening and closing plate to close and block the outlet.

[0010] Preferably, the discharging hopper consists of an upper hopper and a lower hopper, the upper hopper is fixedly connected to the frame, the inlet end of the discharging hopper is arranged on the upper hopper, the upper hopper is provided with a lifting drive component, the outlet of the discharging hopper is arranged on the lower hopper, the lower hopper is connected to the lifting drive component, the lifting drive component is used to drive the lower hopper to move upward to approach the upper hopper, or drive the lower hopper to move downward away from the upper hopper; a paddle is provided in the upper hopper, the paddle is driven to swing by a third cylinder, the paddle can swing left and right in the upper hopper, and the lower end of the paddle can contact the left side wall and the right side wall of the upper hopper respectively, so as to open and close the upper hopper to drop materials separately.

[0011] Preferably, the lifting drive component includes a driving motor, a lead screw, a nut slider and a lifting plate, the lead screw is longitudinally installed on the side of the upper hopper, the lead screw is drivingly connected to the output shaft of the driving motor, the nut slider is sleeved on the lead screw, the nut slider is displaced along the axial direction of the lead screw, the lifting plate is fixedly connected to the nut slider, two linear guide rails parallel to the lead screw are provided on both sides of the lead screw, the lifting plate is slidably connected to the linear guide rails, and the bottom of the lifting plate is fixedly connected to the lower hopper.

[0012] Preferably, the installation height of the connection between the material guide trough and the vibrating material tray is higher than the installation height between the material guide trough and the weighing hopper; the installation heights of the feed assembly, the feeding assembly, the weighing assembly and the discharge conveyor belt decrease in sequence.

[0013] Preferably, two discharging conveyor belts are arranged side by side, and the weighing hopper is conical in shape, with the tip facing downward, and a discharge door that can be opened independently is respectively provided on the left and right sides, and the two discharge doors are respectively connected to a discharging conveyor belt; the weighing assembly also includes a mounting frame; the weighing assembly also includes a mounting frame, and the mounting frame is mounted on the frame at the end of the guide trough, the weighing hopper is connected to the mounting frame, and a damper is provided between the weighing hopper and the mounting frame; the weighing assembly also includes a weighing sensor arranged on the mounting frame, and the mounting frame includes a first mounting plate and a second mounting plate, the first mounting plate is fixed on the mounting frame, the weighing sensor is fixed on the first mounting plate, the weighing hopper is fixed on the second mounting plate, the first mounting plate is parallel to the second mounting plate and is installed longitudinally, the damper is connected between the first mounting plate and the second mounting plate, and a tension spring is connected between the second mounting plate and the weighing sensor.

[0014] The beneficial effects of the utility model are: the utility model provides a combined piano scale, compared with the prior art, the utility model has at least the following technical effects: 1. The materials on the vibrating material tray of the feeding component are dispersed, and the vibrating material tray will vibrate the materials into the material guide trough one by one, and the materials are controlled to enter the weighing hopper one by one through the material guide trough and the material blocking and releasing parts thereon, so as to avoid the problem that too much material is fed into a certain hopper and it is difficult to accurately match the appropriate weight, so as to achieve accurate matching of the required weight of materials output by multiple hoppers. 2. The feeding component is also provided with a first brush roller and a second brush roller. The first brush roller can play a role of buffering and shock absorption when the material fed by the conveyor belt falls onto the vibrating material tray to protect the fruits and vegetables; the second brush roller can assist the vibrating material tray to sweep the fruits and vegetables dispersed on it into the material guide trough. 3. A vibration generator is provided on the lower side of each material guide trough to drive the material guide trough to vibrate, so as to send the materials (fruits and vegetables) to the weighing hopper more quickly. 4. The discharge hopper is designed to be composed of an upper hopper and a lower hopper. The lower hopper can move up and down relative to the upper hopper. Some fruits and vegetables are fragile in appearance. If they fall directly into the packaging box, they are prone to surface damage, which affects sales. In the initial state, the lower hopper is attached to the upper hopper to receive the material. After receiving the appropriate weight of the weighing combination, the lower hopper is driven by the lifting drive to move down and approach the packaging box, so that the material is closer to the packaging box and the falling distance is shorter, which can protect the material. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The utility model is a structural schematic diagram of a combined piano scale.

[0016] Figure 2 It is a structural schematic diagram of the discharging conveyor belt of the utility model.

[0017] Figure 3It is a structural schematic diagram of a vibrating material tray of a material feeding assembly of the utility model.

[0018] Figure 4 It is a structural schematic diagram of a material blocking and releasing member of a feeding assembly of the utility model.

[0019] Figure 5 It is a structural schematic diagram of the material guide trough of the feeding assembly of the utility model.

[0020] Figure 6 It is a structural schematic diagram of an upper hopper of a discharging hopper of the utility model.

[0021] Figure 7 It is a structural schematic diagram of a lower hopper of a discharging hopper of the utility model.

[0022] Figure 8 yes Figure 1 A local enlarged schematic diagram of point A in the middle.

[0023] Fig. 9 It is a structural diagram of the upper hopper.

[0024] Fig.10 It is a structural diagram of the weighing component.

[0025] Fig.11 It is a structural diagram of a weighing hopper.

[0026] Fig.12 It is a schematic diagram of the cross-sectional structure of the weighing hopper.

[0027] Description of the accompanying drawings: 1. Frame; 2. Weighing assembly; 21. Weighing hopper; 211. Unloading door; 212. Damper; 22. Mounting frame; 221. First mounting plate; 222. Second mounting plate; 223. Tension spring; 224. First connecting plate; 225. Second connecting plate; 226. Limit bolt; 227. Spring plate; 228. Weighing sensor; 3. Discharging conveyor belt; 4. Feeding assembly; 41. Vibrating tray; 42. First brush roller; 43. Second brush roller; 5. Feeding assembly; 51. Guide trough; 52. Baffle; 53. First cylinder; 54. Vibration generator; 6. Unloading assembly; 61. Discharging hopper; 611. Upper hopper; 612. Lower hopper; 613. Lifting drive member; 614. Paddle; 615. Third cylinder; 62. Opening and closing member; 621. Opening and closing plate; 622. Second cylinder. DETAILED DESCRIPTION

[0028] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0029] See also Figures 1 to 12A combined piano scale comprises a frame 1, on which a weighing assembly 2 and a discharging conveyor belt 3 are provided, wherein the weighing assembly 2 comprises a plurality of weighing hoppers 21, and the discharging conveyor belt 3 is used to receive the weighed material outputted from the weighing hopper 21. The frame 1 is also provided with a feeding assembly 4 and a feeding assembly 5, wherein the feeding assembly 4 comprises a vibrating tray 41, and the vibrating tray 41 receives the material fed from the outside; the feeding assembly 5 comprises a plurality of guide troughs 51 and a material blocking member, wherein the vibrating tray 41 is connected with a plurality of guide troughs 51, and the vibrating tray 41 is used to spread the materials stacked thereon and enter the guide troughs 51 one by one, and each of the guide troughs 51 is connected with a weighing hopper 21; each of the guide troughs 51 is provided with a material blocking member, which is used to control the material passing through the guide trough 51, so as to control the amount of material entering the weighing hopper 21. The materials on the vibrating tray 41 of the feeding assembly 4 are dispersed, and the vibrating tray 41 vibrates the materials into the guide trough 51 one by one, and the guide trough 51 and the blocking and releasing parts thereon control the materials to enter the weighing hopper 21 one by one, so as to avoid the problem that too much material is fed into a certain hopper, resulting in difficulty in accurately matching the appropriate weight, so as to achieve accurate matching of the required weight of materials output by multiple hoppers. It is preferred to set multiple vibrating trays side by side, and the vibrating trays are existing equipment and no specific protection requirements are made.

[0030] See also Figure 1 , Figure 3 Preferably, the feeding assembly 4 further comprises a first brush roller 42 mounted above the vibrating material tray 41 for shock absorption and buffering; a second brush roller 43 is mounted at the junction of the vibrating material tray 41 and the material guide trough 51 for pushing the material into the material guide trough 51, and the first brush roller and the second brush roller are driven by a motor. The feeding assembly 4 is also provided with a first brush roller 42 and a second brush roller 43, the first brush roller 42 can play a role of buffering and shock absorption when the material fed by the conveyor belt falls onto the vibrating material tray 41, so as to protect the fruits and vegetables; the second brush roller 43 can assist in accelerating the vibrating material tray 41 to sweep the fruits and vegetables dispersed thereon into the material guide trough 51.

[0031] See also Figure 1 , Figure 4 , Figure 5 Preferably, a vibration generator 54 is provided at the lower side of each guide trough 51, which is used to vibrate the guide trough 51 to drive the material on the guide trough 51 to move toward the weighing hopper 21. A vibration generator is provided at the lower side of each guide trough 51, which is used to drive the guide trough 51 to vibrate, so as to deliver the material (fruits and vegetables) to the weighing hopper 21 more quickly.

[0032] See also Figure 1 , Figure 4 , Figure 5Preferably, a plurality of the guide troughs 51 are arranged side by side, and the material blocking member includes a fixed frame and baffles 52 corresponding to the number of the guide troughs 51. The fixed frame is mounted above the guide troughs 51, and the plurality of baffles 52 are respectively hinged on the fixed frame, and each baffle 52 is hinged to a first cylinder 53, and the other end of the first cylinder 53 is hinged to the fixed frame. When a specified number of fruits and vegetables (such as one, two, three, four, etc.) enter the weighing hopper 21, the first cylinder 53 extends to make the baffle 52 rotate downward to press against the surface of the guide trough 51, so as to prevent the remaining fruits and vegetables on the guide trough 51 from continuing to enter the weighing hopper 21. When the weighing hopper 21 weighs and discharges the materials, the first cylinder 53 retracts the baffle 52 and opens again.

[0033] See also Figure 1 to Figure 2 , Figures 6 to 8 Preferably, a material discharge assembly 6 is provided at the end of the discharge conveyor belt 3, and the material discharge assembly 6 includes a discharge hopper 61, the inlet end of the discharge hopper 61 is connected to the discharge conveyor belt 3, and the outlet at the lower end of the discharge hopper 61 is provided with a start-stop member 62. Used to control the packing of fruits and vegetables.

[0034] See also Figure 1 to Figure 2 , Figures 6 to 8 Preferably, the opening and closing member 62 includes an opening and closing plate 621 and a second cylinder 622. The two opening and closing plates 621 are symmetrically hinged on both sides of the outlet at the lower end of the discharge hopper. The two second cylinders 622 are installed on the outer surface of the discharge hopper. The two second cylinders 622 are respectively hinged to the opening and closing plates 621 on the same side. The second cylinder 622 pushes out the opening and closing plate 621 to open the outlet, and the second cylinder 622 retracts the opening and closing plate to close and block the outlet. The two opening and closing plates 621 are acted upon by the second cylinder 622 and open outward at the same time, and the hopper can start to drop materials. After the dropping of materials, the second cylinder 622 drives the opening and closing plates 621 to rotate inward to close the outlet, waiting for the next time to receive and remove materials output by the discharge conveyor belt 3.

[0035] See also Figure 1 to Figure 2 , Figures 6 to 9Preferably, the discharge hopper 61 is composed of an upper hopper 611 and a lower hopper 612, the upper hopper 611 is fixedly connected to the frame 1, the inlet end of the discharge hopper 61 is arranged on the upper hopper 611, the upper hopper 611 is provided with a lifting drive member 613, the outlet of the discharge hopper 61 is arranged on the lower hopper 612, the lower hopper 612 is connected to the lifting drive member 613, and the lifting drive member 613 is used to drive The lower hopper 612 moves upward to approach the upper hopper 611, or drives the lower hopper 612 to move downward away from the upper hopper 611; a paddle 614 is provided in the upper hopper 611, and the paddle is driven to swing by the third cylinder 615. The paddle 614 can swing left and right in the upper hopper 611, and the lower end of the paddle 614 can contact the left and right walls of the upper hopper 611 respectively, so as to open and close the upper hopper 611 to drop materials. The lower hopper 612 can be raised and lowered, so that when discharging materials, it can be moved down to approach the packaging box to reduce the falling height of the materials and avoid bumping against the surface of the materials.

[0036] See also Figure 1 to Figure 2 , Figures 6 to 8 Preferably, the lifting drive member 613 includes a driving motor, a lead screw, a nut slider and a lifting plate. The lead screw is longitudinally installed on the side of the upper hopper 611, the lead screw is drivingly connected to the output shaft of the driving motor, the nut slider is sleeved on the lead screw, the nut slider moves along the axial direction of the lead screw, the lifting plate is fixedly connected to the nut slider, two linear guides parallel to the lead screw are arranged on both sides of the lead screw, the lifting plate is slidably connected to the linear guides, and the bottom of the lifting plate is fixedly connected to the lower hopper 612. It can also be other lifting drive members 613, such as a drive member composed of a motor, a synchronous belt, a synchronous wheel, and a slider, but is not limited thereto.

[0037] See also Figure 1 Preferably, the installation height of the connection between the guide trough 51 and the vibrating material tray 41 is higher than the installation height of the guide trough 51 and the weighing hopper 21; the installation heights of the feeding assembly 4, the feeding assembly 5, the weighing assembly 2 and the discharging conveyor belt 3 are successively reduced. It is convenient for the material to be fed into the vibrating material tray 41, move along the slope into the weighing hopper 21, and then be discharged, making the weighing and discharging process smoother.

[0038] See also Figure 1 to Figure 2 , Figures 9 to 12Preferably, two discharging conveyor belts 3 are arranged side by side, and the weighing hopper 21 is tapered with its tip facing downward, and a discharge door 211 that can be opened independently is respectively provided on the left and right sides, and the two discharge doors are respectively connected to a discharging conveyor belt 3 (the two discharging conveyor belts 3 can run alternately to feed materials, for example, one cannot convey materials while waiting for the weighing hopper to weigh, while the other can run to feed materials after the weighing is completed and the materials fall onto it, so as to ensure that the downstream discharging hopper 61 can reduce the waiting time and help improve the weighing efficiency), one discharging conveyor belt 3 is connected to the left chamber of the paddle 614 in the upper hopper 611, and the other discharging conveyor belt 3 is connected to the right chamber of the paddle 614 in the upper hopper 611; the weighing assembly 2 also includes a mounting frame 22; the weighing hopper 21 is installed by the mounting frame 22, and the mounting frame 22 is erected on the guide trough 51, the weighing hopper 21 is connected to the mounting frame 22, a damper 212 is provided between the weighing hopper 21 and the mounting frame 22, the weighing assembly 2 also includes a weighing sensor 228 provided on the mounting frame 22, the mounting frame 22 includes a first mounting plate 221 and a second mounting plate 222, the first mounting plate 221 is fixed on the mounting frame 22, the weighing sensor 228 is fixed on the first mounting plate 221, the weighing hopper 21 is fixed on the second mounting plate 222, the first mounting plate 221 and the second mounting plate 222 are parallel and longitudinally installed, the damper 212 is connected between the first mounting plate 221 and the second mounting plate 222, and a tension spring 223 is connected between the second mounting plate 222 and the weighing sensor. The damper 212 allows the weighing hopper 21 to consume the energy of vibration when feeding. When feeding, the weighing hopper 21 will slightly swing up and down and vibrate. This vibration affects the weighing result. The damper 212 consumes the energy of vibration through damping to reduce the vibration to a state where weighing can be performed. Thereby reducing the impact of vibration on weighing. The weighing hopper and the mounting frame can have a certain swing. The damper 212 is composed of an oil cup and a piston. The oil cup is filled with damping oil. The interior is similar to a piston. Shock is reduced by the damping oil in the oil cup. One end of the piston is movably connected to the top of the weighing hopper 21, and the oil cup is fixed to the mounting frame. The specific structure of the weighing hopper 21 can be referred to the existing weighing hopper, and the detailed description will not be expanded.

[0039] See also Figure 1 to Figure 2 , Figures 9 to 12Preferably, the mounting frame 22 further comprises a first connecting plate 224 and a second connecting plate 225, wherein the first connecting plate 224 is fixed on the surface of the first mounting plate 221 facing the second mounting plate 222, and the second connecting plate 225 is fixed on the surface of the second mounting plate 222 facing the first mounting plate 221, the first connecting plate 224 and the second connecting plate 225 are parallel, a clearance hole is provided on the first connecting plate 224, one end of the tension spring 223 is connected to the second connecting plate 225, and the other end of the tension spring 223 passes through the clearance hole and is connected to the weighing sensor 228, the oil cup of the damper 212 is fixed on the first connecting plate 224, the piston of the damper 212 is movably connected to the second mounting plate 222, and a limiting bolt 226 is provided between the second connecting plate 225 and the first connecting plate 224 on the side away from the second mounting plate 222. The limiting bolt 226 is used to prevent the spring plate and the weighing sensor from being damaged due to transitional bending after the overweight material enters the weighing hopper. The tension spring 223 is used to transmit the force generated by the longitudinal displacement of the second connecting plate after the material enters the weighing hopper 21 to the weighing sensor 228. The weighing sensor calculates the weight according to its own bending degree and is a standard part. The tension spring 223 is used to transmit the gravity of the material after entering the weighing hopper.

[0040] A spring plate is provided between the top and bottom of the first mounting plate 221 and the second mounting plate 222, respectively. The two ends of the spring plate are fixedly connected to the first mounting plate 221 and the second mounting plate 222, respectively. The weight of the weighing hopper 21 and the material in the weighing hopper 21 is mainly borne by the spring plate 227, which can have a certain deformation amount so that the weight of the weighing hopper 21 can drive the second connecting plate 225 to produce a certain longitudinal displacement, and then pull down the tension spring 223 to transfer the gravity to the weighing sensor 228 to weigh the weight of the material in the hopper; the spring plate 227 can also keep the weighing component in this shape without excessive bending and deformation.

[0041] The utility model has the following working principle:

[0042] The external material is fed to the vibrating tray 41 through the external conveyor belt, and the first brush roller 42 on the vibrating tray 41 can play a role of buffering and shock absorption when the material falls on the vibrating tray 41, and the material on the vibrating tray 41 is dispersed, and then the second brush roller 43 rotates to cooperate with the vibrating tray 41 to feed the material into each guide trough 51; then the vibration generator works, the first cylinder 53 drives the baffle 52 to open upward, and the material enters the corresponding weighing hopper 21 along each guide trough 51, and the first cylinder 53 controls the baffle 52 to close the guide trough 51; after the weighing hopper 21 is weighed, the upper computer calculates and controls the combination to obtain the corresponding weight (after weighing the falling material, it can be The baffle 52 is opened again to feed the material for the next weighing), so that the corresponding weighing hopper 21 opens and drops the material onto the discharge conveyor belt 3 and is sent into the upper hopper 611 of the discharge hopper 61 (if the lower hopper is unloading at this time, the paddle 614 swings to block the chamber on the corresponding side of the upper hopper connected to the material conveyor belt that is conveying the material), and then falls into the lower hopper 612, and the lifting drive member 613 drives the lower hopper 612 to move downward to approach the packaging box placed thereunder, and the second cylinder 622 drives the opening and closing plate 621 to open, and the material can fall into the packaging box; thereafter, the second cylinder 622 controls the opening and closing plate 621 to close, and then the lifting drive member 613 drives the lower hopper 612 to move upward to abut against the upper hopper 611.

[0043] Several points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, and can be mechanical or electrical connections, or internal connectivity between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative position relationships. When the absolute position of the object being described changes, the relative position relationship may change.

[0044] Secondly: In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other.

[0045] Finally, the above is only a preferred implementation of the present utility model, and the protection scope of the present utility model is not limited to the above embodiments. All technical solutions under the concept of the present utility model belong to the protection scope of the present utility model.

[0046] It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications without departing from the principle of the utility model should also be regarded as within the protection scope of the utility model.

Claims

1. A combined piano scale, comprising a frame, on which a weighing assembly and a discharging conveyor belt are arranged, wherein the weighing assembly comprises a plurality of weighing hoppers, and the discharging conveyor belt is used to receive the weighed material outputted from the weighing hoppers, characterized in that: The frame is also provided with a feed assembly and a feeding assembly, the feed assembly includes a vibrating material tray, the vibrating material tray receives materials fed from the outside; the feeding assembly includes a plurality of material guide troughs and material blocking and releasing parts, the vibrating material tray is connected with a plurality of material guide troughs, the vibrating material tray is used to spread the materials stacked thereon and let them enter the material guide troughs one by one, each of the material guide troughs is connected with a weighing hopper; each of the material guide troughs is provided with a material blocking and releasing part, which is used to control the material passing through the material guide trough so as to control the amount of material entering the weighing hopper.

2. A combined piano scale according to claim 1, characterized in that: The feeding assembly also includes a first brush roller mounted above the vibrating material tray for shock absorption and buffering; a second brush roller is mounted at the junction of the vibrating material tray and the material guide trough for pushing the material into the material guide trough, and the first brush roller and the second brush roller are driven by a motor.

3. A combined piano scale according to claim 2, characterized in that: A vibration generator is arranged at the lower side of each of the material guide troughs, which is used to vibrate the material guide trough to drive the material on the material guide trough to move toward the weighing hopper.

4. A combined piano scale according to claim 3, characterized in that: A plurality of the material guide troughs are arranged side by side, and the material blocking member includes a fixed frame and baffles corresponding to the number of the material guide troughs. The fixed frame is mounted above the material guide troughs, and the plurality of baffles are respectively hinged on the fixed frame, and each of the baffles is hinged to a first cylinder, and the other end of the first cylinder is hinged to the fixed frame.

5. The combined piano scale according to claim 1, characterized in that: A material discharge assembly is provided at the end of the discharge conveyor belt, and the material discharge assembly includes a discharge hopper. The inlet end of the discharge hopper is connected to the discharge conveyor belt, and the outlet at the lower end of the discharge hopper is provided with an opening and closing member.

6. A combined piano scale according to claim 5, characterized in that: The opening and closing parts include an opening and closing plate and a second cylinder. The two opening and closing plates are symmetrically hinged on both sides of the outlet at the lower end of the discharge hopper. Two second cylinders are installed on the outer surface of the discharge hopper. The two second cylinders are respectively hinged to the opening and closing plates on the same side. The second cylinder pushes out the opening and closing plate to open the outlet, and the second cylinder retracts the opening and closing plate to close and block the outlet.

7. The combined piano scale according to claim 5, characterized in that: The discharging hopper is composed of an upper hopper and a lower hopper, the upper hopper is fixedly connected to the frame, the inlet end of the discharging hopper is arranged on the upper hopper, the upper hopper is provided with a lifting drive component, the outlet of the discharging hopper is arranged on the lower hopper, the lower hopper is connected to the lifting drive component, the lifting drive component is used to drive the lower hopper to move upward to approach the upper hopper, or drive the lower hopper to move downward away from the upper hopper; a paddle is provided in the upper hopper, the paddle is driven to swing by the third cylinder, the paddle can swing left and right in the upper hopper, the lower end of the paddle can contact the left side wall and the right side wall of the upper hopper respectively, and is used to open and close the upper hopper to drop materials separately.

8. The combined piano scale according to claim 7, characterized in that: The lifting drive component includes a driving motor, a lead screw, a nut slider and a lifting plate. The lead screw is longitudinally installed on the side of the upper hopper, the lead screw is drivingly connected to the output shaft of the driving motor, the nut slider is sleeved on the lead screw, the nut slider is displaced along the axial direction of the lead screw, the lifting plate is fixedly connected to the nut slider, two linear guide rails parallel to the lead screw are arranged on both sides of the lead screw, the lifting plate is slidably connected to the linear guide rails, and the bottom of the lifting plate is fixedly connected to the lower hopper.

9. The combined piano scale according to claim 1, characterized in that: The installation height of the connection between the material guide trough and the vibrating material tray is higher than the installation height of the material guide trough and the weighing hopper; the installation heights of the feed assembly, the feeding assembly, the weighing assembly and the discharge conveyor belt decrease in sequence.

10. The combined piano scale according to claim 1, characterized in that: The discharging conveyor belts are provided with two side by side, and the weighing hopper is tapered with the tip facing downward, and a discharge door which can be opened independently is respectively provided on the left and right sides, and the two discharge doors are respectively connected with a discharging conveyor belt; the weighing assembly also includes a mounting frame, and the weighing hopper is installed by the mounting frame, and the mounting frame is mounted on the frame at the end of the guide trough, and the weighing hopper is connected to the mounting frame, and a damper is provided between the weighing hopper and the mounting frame; the weighing assembly also includes a weighing sensor provided on the mounting frame, and the mounting frame includes a first mounting plate and a second mounting plate, the first mounting plate is fixed on the mounting frame, the weighing sensor is fixed on the first mounting plate, and the weighing hopper is fixed on the second mounting plate, the first mounting plate is parallel to the second mounting plate and is installed longitudinally, the damper is connected between the first mounting plate and the second mounting plate, and a tension spring is connected between the second mounting plate and the weighing sensor.

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