A breakage mechanism for a subtraction metering scale

Abstract

The utility model discloses a kind of arch breaking mechanism for subtraction measurement scale, applied to subtraction measurement scale, including weighing hopper body, two shaftless spirals are rotationally arranged in the inside of weighing hopper body close to bottom, and gear wheel is fixedly arranged in the one end of two shaftless spirals and is stretched out to the outside of weighing hopper body;Arch breaking plow main shaft is rotationally arranged in the middle position in the inside of weighing hopper body, and a plurality of plow blades are fixedly arranged on arch breaking plow main shaft at equal distance;Speed reducer is fixedly arranged outside weighing hopper body, and speed reducer is synchronously driven arch breaking plow main shaft and two shaftless spiral rotation by sprocket transmission assembly, and unblock mechanism is fixedly arranged in the inside of weighing hopper body both sides wall, the utility model uses shaftless spiral structure, avoids the adhesion of viscous material on shaft;Plow blade type arch breaking device is used, and structure is reasonable, and arch breaking resistance is small;Setting electric push rod driven unblock mechanism, action is gentle, impact is small, significantly reduce the influence to measurement accuracy, improve system stability and reliability.

Description

Technical Field

[0001] This utility model relates to the technical field of subtraction weighing scale devices, specifically to a bridge breaking mechanism for subtraction weighing scales. Background Technology

[0002] Existing subtractive weighing scales often employ a double-spiral discharge device when conveying materials. Traditional spirals have a shaft structure, and viscous materials easily adhere to the shaft, affecting conveying efficiency. Arch-breaking devices mostly use blade-type structures, which experience significant resistance when handling high-density materials, easily leading to motor overload or poor arch-breaking effect. Regarding the weighing hopper material, carbon steel is prone to material adhesion, while all-stainless steel is expensive. Current technologies often use air hammers or vibratory motors for unblocking, but the impact and vibration generated during their operation severely affect the accuracy of the weighing scale. Therefore, a bridge-breaking mechanism is needed that can reduce arch-breaking resistance, minimize material adhesion, and not compromise weighing accuracy. Utility Model Content

[0003] (I) Technical Issues

[0004] This utility model provides a bridge breaking mechanism for subtractive weighing scales, which aims to solve the problems of material conveying in traditional subtractive weighing scales.

[0005] (II) Technical Content

[0006] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows: a bridge-breaking mechanism for a subtraction weighing scale, applied to a subtraction weighing scale, including a weighing hopper body, the upper end of the weighing hopper body being open and a weighing hopper cover being provided at the opening, and a discharge port being provided at one end of the bottom of the weighing hopper body; two shaftless spirals being rotatably arranged near the bottom inside the weighing hopper body, one end of the two shaftless spirals extending to the outside of the weighing hopper body and fixedly provided with gears, the two gears meshing with each other; a bridge-breaking plow blade main shaft being rotatably arranged in the middle position inside the weighing hopper body, and several plow blades being fixedly arranged at equal intervals on the bridge-breaking plow blade main shaft; a reduction motor being fixedly arranged outside the weighing hopper body, the reduction motor synchronously driving the bridge-breaking plow blade main shaft and the two shaftless spirals to rotate through a sprocket transmission assembly; a blockage-clearing mechanism being fixedly arranged on both the front and rear side walls inside the weighing hopper body; and the inner lining of the weighing hopper body being made of stainless steel.

[0007] Furthermore, the sprocket drive assembly includes a sprocket one fixedly mounted on the end of the main shaft of the arch-breaking plow blade, and sprockets two and three coaxially fixedly mounted on the outer end of one of the gears in sequence. A drive sprocket is fixedly mounted on the drive shaft of the reduction motor. The drive sprocket is connected to sprocket three via a first chain, and sprocket two is connected to sprocket one via a second chain. The assembly also includes an auxiliary sprocket rotatably mounted outside the weighing bucket body, with the second chain meshing with the auxiliary sprocket.

[0008] Furthermore, the two shaftless helices have opposite helical directions.

[0009] Furthermore, the pitch of the shaftless helix is ​​a gradually changing pitch.

[0010] Furthermore, the unblocking mechanism includes a square shell fixedly disposed on the inner wall of the weighing hopper, an electric push rod fixedly disposed inside the square shell, an unblocking block fixedly disposed on the piston end of the electric push rod, and multiple fins fixedly disposed on the unblocking block.

[0011] Furthermore, the plow blade adopts a conical structure.

[0012] (III) Technical Effects

[0013] Compared with the prior art, the advantages of this utility model are as follows: it adopts a shaftless spiral structure, which avoids the adhesion of sticky materials on the shaft and improves the smoothness and efficiency of material conveying; it adopts a plow-type arch-breaking device, which has a reasonable structure, low arch-breaking resistance, and is suitable for high-density materials; the inner lining of the weighing hopper is made of stainless steel, which reduces material adhesion and controls manufacturing costs; and it is equipped with an electric push rod driven unblocking mechanism, which has smooth operation and low impact, significantly reducing the impact on metering accuracy and improving system stability and reliability. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of a bridge breaking mechanism for a subtraction weighing scale according to this utility model. Figure 1 .

[0015] Figure 2 This is a three-dimensional structural diagram of a bridge breaking mechanism for a subtraction weighing scale according to this utility model. Figure 2 .

[0016] Figure 3 This is a three-dimensional structural diagram of a bridge breaking mechanism for a subtraction weighing scale according to this utility model. Figure 3 .

[0017] Figure 4 This is a partial structural schematic diagram of a bridge breaking mechanism for a subtraction weighing scale according to this utility model.

[0018] Figure 5 This is a front view structural schematic diagram of a bridge breaking mechanism for a subtraction weighing scale according to this utility model.

[0019] Figure 6 This is a top view schematic diagram of the bridge breaking mechanism for a subtraction weighing scale according to the present invention.

[0020] Figure 7 This is a schematic cross-sectional view of a bridge breaking mechanism for a subtraction weighing scale according to this utility model. Figure 1 .

[0021] Figure 8This is a schematic cross-sectional view of a bridge breaking mechanism for a subtraction weighing scale according to this utility model. Figure 2 .

[0022] Figure 9 This is a structural schematic diagram of the arch-breaking mechanism of a subtractive weighing scale.

[0023] Figure 10 This is a schematic diagram of the unblocking mechanism of a bridge breaking mechanism for a subtraction weighing scale according to the present invention.

[0024] As shown in the figure: 1. Weighing bucket body; 2. Weighing bucket cover; 3. Discharge port; 4. Shaftless auger; 5. Gear; 6. Plow blade main shaft; 7. Plow blade; 8. Unblocking mechanism; 9. Gear motor; 10. Sprocket 1; 11. Sprocket 2; 12. Sprocket 3; 13. Drive sprocket; 14. Chain; 15. Second chain; 16. Second chain; 81. Square shell; 82. Electric push rod; 83. Unblocking block; 84. Fin. Detailed Implementation

[0025] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "center", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation structure and operation. Therefore, they should not be construed as limitations on this utility model.

[0026] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "provided with," "installed," "connected," "linked," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0027] The present invention will now be described in further detail with reference to the accompanying drawings.

[0028] Combined with appendix Figure 1 To be continued Figure 10A bridge-breaking mechanism for a subtraction weighing scale is disclosed. The scale includes a weighing hopper 1 with an opening at the top and a weighing hopper cover 2. A discharge port 3 is located at one bottom end of the weighing hopper 1. Two shaftless spirals 4 are rotatably mounted near the bottom inside the weighing hopper 1, with one end of each spiral extending outside the weighing hopper 1 and fixedly mounted with gears 5, which mesh with each other. A bridge-breaking plow shaft 6 is rotatably mounted in the middle of the weighing hopper 1, with several equally spaced plow blades 7 fixed on the shaft. Each plow blade 7 has a conical structure. A reduction motor 9 is fixedly mounted outside the weighing hopper 1, synchronously driving the bridge-breaking plow shaft 6 and the two shaftless spirals 4 through a sprocket transmission assembly. Unblocking mechanisms 8 are fixedly mounted on both the front and rear side walls inside the weighing hopper 1. The weighing hopper 1 is lined with stainless steel. The two shaftless spirals 4 have opposite spiral directions and a gradually changing pitch.

[0029] In this embodiment, as a preferred technical solution, the sprocket drive assembly includes a first sprocket 10 fixedly mounted on the end of the main shaft 6 of the arch-breaking plow blade, and a second sprocket 11 and a third sprocket 12 coaxially fixedly mounted on the outer end of one of the gears 5. A drive sprocket 13 is fixedly mounted on the drive shaft of the reduction motor 9. The drive sprocket 13 is connected to the third sprocket 12 via a first chain 14. The second sprocket 11 is connected to the first sprocket 10 via a second chain 15. The assembly also includes an auxiliary sprocket 16 rotatably mounted outside the weighing bucket body 1. The second chain 15 meshes with the auxiliary sprocket 16.

[0030] In this embodiment, as a preferred technical solution, the unblocking mechanism 8 includes a square shell 81 fixedly disposed on the inner wall of the weighing bucket 1, an electric push rod 82 fixedly disposed inside the square shell 81, an unblocking block 83 fixedly disposed on the piston end of the electric push rod 82, and a plurality of fins 84 fixedly disposed on the unblocking block 83.

[0031] The working principle of this utility model is as follows: The bridging mechanism drives the sprocket transmission assembly through the reduction motor 9, which synchronously drives the main shaft 6 of the bridging plow and the two shaftless screws 4 to work together. The bridging plow 7 rotates in the middle layer of the material to break the "bridging" phenomenon of the material; the shaftless screws 4 transport the material to the discharge port 3 at the bottom to achieve controllable discharge; the unblocking mechanism 8 operates intermittently to help loosen the material near the bucket wall; the stainless steel lining reduces material adhesion and ensures smooth material discharge.

[0032] The working process of this utility model is as follows:

[0033] Step 1: Material enters through the opening at the top of the weighing hopper 1, and the weighing hopper cover 2 can be closed as needed. Before the geared motor 9 starts, the unblocking mechanism 8 is in the retracted state, and the shaftless screw 4 and the plow blade 7 are stationary.

[0034] Step 2: The reduction motor 9 starts and drives the third sprocket 12 to rotate through the active sprocket 13 and the first chain 14. The third sprocket 12 is coaxially fixed with the second sprocket 11, thereby driving the gear 5 and the shaftless screw 4 to rotate. At the same time, the second sprocket 11 cooperates with the auxiliary sprocket 16 through the second chain 15 to drive the first sprocket 10, which in turn drives the main shaft 6 of the plow blade to rotate.

[0035] Step 3: The main shaft 6 of the feed plow drives multiple conical plow blades 7 to rotate in the middle layer of material, breaking up the accumulated material and preventing the formation of "arches". Two shaftless screws 4 have opposite spiral directions and work together to convey the material from both sides to the central discharge port 3. The screws adopt a pitch design that gradually decreases from the inside to the outside towards the discharge port. During the conveying process, as the pitch decreases, the conveying volume per unit angle decreases accordingly, thereby achieving linear adjustment and stable control of the discharge flow rate, avoiding sudden spillage or overrush of material, and ensuring the stability and accuracy of metering.

[0036] Step 4: When obstructed material flow is detected or a timer is triggered, the electric push rod 82 pushes the unblocking block 83 to extend into the hopper. The fins 84 on the unblocking block 83 agitate the material near the hopper wall to prevent adhesion. After the action is completed, the electric push rod retracts to avoid continuous interference with metering.

[0037] Step 5: The material is pushed to the discharge port 3 by the shaftless screw 4 and enters the downstream process. Throughout the process, the stainless steel liner reduces material adhesion, the shaftless structure avoids material accumulation in the center of the screw, the plow blade reduces resistance, and the unblocking mechanism moves smoothly, all of which together ensure the measurement accuracy of the subtraction weighing scale.

[0038] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A bridge breaking mechanism for a subtraction weighing scale, applied to a subtraction weighing scale, comprising a weighing hopper (1), wherein the upper end of the weighing hopper (1) is open and a weighing hopper cover (2) is provided at the opening, and a discharge port (3) is provided at one end of the bottom of the weighing hopper (1), characterized in that: The weighing bucket (1) has two shaftless spirals (4) rotatably mounted near the bottom inside. One end of each shaftless spiral (4) extends to the outside of the weighing bucket (1) and is fixedly mounted with a gear (5). The two gears (5) mesh with each other. The weighing bucket (1) has a main shaft (6) for breaking the arches of the plow blade rotatably mounted in the middle position inside. Several plow blades (7) are fixedly mounted on the main shaft (6) for breaking the arches of the plow blade rotatably mounted at equal intervals. The weighing bucket (1) has a geared motor (9) fixedly mounted on the outside. The geared motor (9) drives the main shaft (6) for breaking the arches of the plow blade rotatably mounted and the two shaftless spirals (4) to rotate synchronously through a sprocket transmission assembly. The weighing hopper (1) is equipped with a blockage-removing mechanism (8) on both the front and rear side walls inside, and the lining of the weighing hopper (1) is made of stainless steel.

2. The bridge breaking mechanism for a subtraction weighing scale according to claim 1, characterized in that: The sprocket drive assembly includes a sprocket one (10) fixedly mounted on the end of the main shaft (6) of the arch-breaking plow, and sprocket two (11) and sprocket three (12) coaxially fixedly mounted on the outer end of one of the gears (5). A drive sprocket (13) is fixedly mounted on the drive shaft of the reduction motor (9). The drive sprocket (13) is connected to sprocket three (12) via a first chain (14). Sprocket two (11) is connected to sprocket one (10) via a second chain (15). It also includes an auxiliary sprocket (16) rotatably mounted on the outside of the weighing bucket body (1). The second chain (15) meshes with the auxiliary sprocket (16).

3. The bridge breaking mechanism for a subtraction weighing scale according to claim 1, characterized in that: The two shaftless helices (4) have opposite helical directions.

4. The bridge breaking mechanism for a subtraction weighing scale according to claim 1, characterized in that: The pitch of the shaftless helix (4) is a gradually changing pitch.

5. The bridge breaking mechanism for a subtraction weighing scale according to claim 1, characterized in that: The unblocking mechanism (8) includes a square shell (81) fixedly disposed on the inner wall of the weighing bucket (1), an electric push rod (82) fixedly disposed inside the square shell (81), an unblocking block (83) fixedly disposed on the piston end of the electric push rod (82), and multiple fins (84) fixedly disposed on the unblocking block (83).

6. The bridge breaking mechanism for a subtraction weighing scale according to claim 1, characterized in that: The plow blade (7) has a conical structure.

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