CN216401942U - Hopper scraping device - Google Patents

Abstract

The utility model discloses a hopper scraping device which is mainly applied to a gravity type automatic charging weighing apparatus. Its structure includes frame, guide cylinder, drive division, interior portion of scraping and the portion of scraping of side, the guide cylinder is fixed in one side of frame, interior portion of scraping with the portion of scraping of side all is located the below of guide cylinder, interior portion of scraping is including connecing material piece and interior scraping, interior scraping slidable ground stand in connect the material piece accept on the one side of material, drive division can drive connect the material piece with interior scraping takes place relative motion, makes interior scraping can with connect the material in the material piece to push away to connect the edge of material piece, the portion is scraped including the side to the side, side scraping slidable ground is located interior scraping surface. By adopting the utility model, the problems of slow flowing, residue and the like of the high-viscosity material can be effectively improved, the flowing speed of the material is greatly increased, and the production efficiency is improved.

Description

Hopper scraping device

Technical Field

The utility model relates to the technical field of gravity type automatic loading weighing apparatus, in particular to a hopper scraping device.

Background

With the development of electronic technology and computer technology, the quantitative weighing technology combined with a microcomputer system is widely applied to various industries. In the field of food quantitative weighing and packaging, such a quantitative weighing device is often required. The gravity type automatic loading weighing apparatus is a device commonly used in quantitative weighing in the field, is an intelligent combined type quantitative weighing and packaging device, and has the basic principle that a plurality of hoppers are utilized to equally divide and weigh materials, and the hoppers with proper weight are combined to obtain a part of material with the weight within the standard deviation range.

Gravity type automatic charging weighing apparatus on the existing market is used for combining some regular and the better material of mobility and weighs more, and to high viscidity material, because its relatively poor characteristic of mobility can lead to often that the material flow speed is slow and the material glues and leads to remaining scheduling problem, has influenced production efficiency in the combination balance. The existing gravity type automatic loading weighing apparatus adopts a surface improvement method to solve the problem. The utility model CN201810829275.4 discloses a combination balance, in which a grid plate structure is used in the storage hopper and the weighing hopper to reduce the contact area when the high viscosity material contacts the surface of the storage hopper and the weighing hopper, so as to increase the material flow speed. Or spraying Teflon on the surfaces of the storage hopper and the weighing hopper to improve the surface lubricity of the storage hopper and the weighing hopper, or adopting a checkered plate, a mirror-surface plate, a nylon plate and the like as panels of the storage hopper and the weighing hopper to improve the surface lubricity of the storage hopper and the weighing hopper. Above solution is surface treatment or the material change to the storage hopper and weighing hopper, and in the in-service use, its effect of improving is limited, can't promote the flow speed of high viscosity material by a wide margin to production efficiency has been retrained.

Disclosure of Invention

The technical problem to be solved by the utility model is to provide a hopper scraping device, which can effectively solve the problems of slow flowing, residue and the like of high-viscosity materials, greatly improve the flowing speed of the materials and improve the production efficiency.

In order to solve the technical problem, the utility model provides a hopper scraping device which comprises a rack, a guide cylinder, a driving part, a linkage part, an inner scraping part and a side scraping part, wherein the guide cylinder is fixed on one side of the rack, and the inner scraping part and the side scraping part are both positioned below the guide cylinder.

The inner scraping part comprises a receiving part and an inner scraping part, the receiving part is positioned below the guide cylinder and can receive materials falling from the guide cylinder, and the inner scraping part can be slidably arranged on one surface of the receiving part, which receives the materials, in a vertical mode.

The driving part comprises a driving part, a transmission part and a crank, wherein the movable end of the driving part is connected with the crank, and the driving part can drive the crank to rotate and transmit power to the transmission part.

The side scraping part comprises a side scraping piece which is slidably positioned on the surface of the inner scraping piece, and the side scraping piece can slide from one side of the inner scraping piece to the other side of the inner scraping piece, so that the material on the inner scraping piece is pushed to the edge of the inner scraping piece.

Linkage portion is equipped with reverse link gear or linkage link mechanism, linkage portion with the driving medium is connected, drive division can pass through reverse link gear or reverse link gear makes connect the material piece with interior scraping is towards opposite direction swing, interior scraping can with material in the material piece pushes away to connect the edge of material piece.

The material receiving part is provided with a first connecting arm, the free end of the first connecting arm is connected with the transmission part, and the driving part can drive the material receiving part to swing in a reciprocating mode through the connecting arm.

The upper edge of the inner scraping piece is close to the opening at the bottom of the material guide cylinder, and the lower edge of the inner scraping piece is close to one surface of the material receiving piece for receiving materials.

The side scraping part further comprises a supporting rod, the supporting rod is arranged on two sides of the side scraping part, one end of the supporting rod is connected with the side scraping part, and the other end of the supporting rod is hinged to the rack.

The initial position of the supporting rod is located at the upper edge of the inner scraping piece, and an angle formed by the initial position of the supporting rod and one side, close to the receiving piece, of the surface of the inner scraping piece is an obtuse angle.

The side scraping part further comprises a resetting piece, one end of the resetting piece is fixed on the rack, the other end of the resetting piece is connected to the supporting rod, the resetting piece is elastic and can enable the side scraping piece to be tightly attached to the surface of the inner scraping piece.

The reverse linkage mechanism comprises a first gear and a second gear, wherein the first gear is mounted on the upper portion of a connecting arm fixed on two sides of the material receiving part, the second gear is fixed on the upper portion of two sides of the inner scraping part, the first gear and the second gear are meshed with each other, and the first gear and the material receiving part can drive the second gear to rotate in opposite directions when rotating together.

The linkage connecting rod mechanism comprises a first connecting rod and a second connecting rod, the first connecting rod is connected between the second connecting rod and one side of the transmission part, and the second connecting rod is connected to one side of the inner scraping part.

The linkage connecting rod mechanism further comprises a third connecting rod and a fourth connecting rod, the third connecting rod is connected between the fourth connecting rod and one side of the transmission part, and the fourth connecting rod is connected to one side of the inner scraping part.

The third connecting rod and the fourth connecting rod are positioned on the other side of the transmission piece, which is far away from the first connecting rod and the second connecting rod.

The implementation of the utility model has the following beneficial effects:

the hopper scraping device is provided with the inner scraping part, the inner scraping part comprises the material receiving part and the inner scraping part, the material receiving part can receive materials falling from the guide cylinder, and the inner scraping part can scrape the materials in the material receiving part to the edge, so that the materials can quickly fall into the next station from the material receiving part without residues. In order to clear away remaining material on the interior scraper blade, hopper scraper still is equipped with the side and scrapes the portion, is equipped with the side in the side scrapes the piece, can push away the material on the interior scraper to the edge and make it fall into next station, has reached the effect of cleaing away remaining material. Therefore, the utility model can effectively solve the problems of slow flowing, residue and the like of the high-viscosity material, greatly improve the flowing speed of the material and improve the production efficiency.

Drawings

FIG. 1 is a schematic structural diagram of a first embodiment of the present invention;

FIG. 2 is a schematic view of the structure of FIG. 1 with a portion of the frame and the guide cylinder removed;

FIG. 3 is a schematic view of the drive section of FIG. 2 with the drive section removed;

FIG. 4 is a schematic structural view of a second embodiment of the present invention with a portion of the frame and the guide cylinder removed;

FIG. 5 is a schematic view of the structure of FIG. 4 with the second connecting rod and the receiving member removed;

fig. 6 is a schematic structural diagram of a third embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings. It is only noted that the utility model is intended to be limited to the specific forms set forth herein, including any reference to the drawings, as well as any other specific forms of embodiments of the utility model.

Referring to fig. 1 and 2, a hopper scraping device is disclosed in a first embodiment of the present invention. Including frame 5, guide cylinder 4, drive division 3, linkage portion 6, interior portion 1 of scraping and the portion 2 of scraping of side, guide cylinder 4 is fixed in one side of frame 5, and interior portion 1 of scraping and the portion 2 of scraping of side all are located the below of guide cylinder 4. The inner scraper 1 comprises a receiving member 11 and an inner scraper 12, wherein the receiving member 11 is preferably a gate structure with a receiving groove at the bottom, and the inner scraper 12 is a plate with a scraping function. The receiving part 11 is located below the material guide cylinder 4, so that the receiving part 11 can receive materials falling from the material guide cylinder 4, and the inner scraping part 12 is slidably erected on one surface of the receiving part 11, which receives the materials, so as to scrape the materials on the receiving part 11.

The receiving member 11 is provided with a first connecting arm 111 and a first gear 611, a free end of the first connecting arm 111 is connected with the transmission member 32, and the driving member 31 can drive the receiving member 11 through the first connecting arm 111 and transmit power to the second gear 612 through the first gear 611. The driving unit 3 includes a driving member 31, a transmission member 32, and a crank 33, and the driving member 31 is preferably a rotary motor, and may be a device having a reciprocating characteristic such as an air cylinder. The driving member 31 can drive the crank 33, and the crank 33 transmits power to the transmission member 32 to reciprocate. The transmission member 32 is connected to the first connecting arm 111 through the first connecting rod 621 and the second connecting rod 622, and the driving member 31 can control the material receiving member 11 to swing back and forth through the crank 33 and the transmission member 32.

The movable end of the driving member 31 is connected to the crank 33, and the driving member 31 can drive the crank 33 to rotate and transmit power to the transmission member 32, so as to drive the transmission member 32 to reciprocate. The side scraping part 2 comprises a side scraping piece 21, the side scraping piece 21 is preferably a rod with a long rod with a material scraping function at the bottom, the side scraping piece 21 is slidably arranged on the surface of the inner scraping piece 12, the power of the side scraping piece 21 is from the inner scraping piece 12 which reciprocates, under the pushing of the inner scraping piece 12, the side scraping piece 21 can slide from one side to the other side of the inner scraping piece 12, so that the material on the inner scraping piece 12 is pushed to the edge of the inner scraping piece 12, and the material remained on the inner scraping piece 12 can be scraped to the next station from top to bottom. By properly setting the strokes of the inner scraper 12 and the side scraper 21, the time for the inner scraper 12 to reach the edge of the receiving part 11 is equal to or close to the time for the side scraper 21 to reach the edge of the inner scraper 12, so that the materials on the receiving part 11 and the materials left on the inner scraper 12 are scraped off at the same time in the next station, and the speed for the materials to flow into the next station can be further increased.

In the first embodiment of the present invention, the linkage portion 6 is provided with the reverse linkage 61, the reverse linkage 61 is respectively connected with the receiving member 11 and the inner scraping member 12, the driving portion 3 can drive the receiving member 11 and the inner scraping member 12 to swing in opposite directions through the reverse linkage 61, wherein the inner scraping member 12 can push the material in the receiving member 11 to the edge of the receiving member 11.

Specifically, in the first embodiment, the reverse link mechanism 61 includes the first gear 611 fixed to the upper portions of both sides of the material receiving member 11, and the second gear 612 fixed to the upper portions of both sides of the inner scraper 12. The first gear 611 is fixed on the connecting arm at both sides of the receiving member 11, the second gear 612 is located below the first gear 611 and fixed on the upper portion of the inner scraper 12, and the first gear 611 and the second gear 612 are engaged with each other, so that the second gear 612 can be driven to rotate in the opposite direction when the first gear 611 rotates. When the material receiving member 11 swings under the action of the driving member 31, due to the meshing action of the first gear 611 and the second gear 612, the inner scraping member 12 can swing in the opposite direction to the material receiving member 11, so that the material on the material receiving member 11 can be scraped from one side edge to the other side edge, and the material scraping effect is achieved.

Referring to fig. 4 and 5, the second embodiment of the present invention discloses another hopper scraping device, wherein the second embodiment is different from the first embodiment in that the driving member 31 drives two sets of left and right link mechanisms simultaneously, wherein one set of link mechanisms comprises a third link 623, a fourth link 624 and an inner scraper 12, and the driving member 31 drives the inner scraper 12 to swing outwards (i.e. to swing away from the driving member 31) through the third link 623 and the fourth link 624. The other set of link mechanism includes a first link 621, a second link 622 and a material receiving member 11, the link mechanism is connected in the same manner as the first embodiment, one end of the first link 621 is connected to the transmission member 32, the other end is connected to the second link 622, and the second link 622 is connected to the first connecting arm 111 on the material receiving member 11, so that the material receiving member 11 is driven by the driving member 31 to swing inward (i.e. swing toward one side of the driving member 31), and forms a pair scraping with the inner scraping member 12 of the other set of reverse direction movement mechanism, so as to push the material in the material receiving member 11 to the edge of the material receiving member 11, and push the high-viscosity material to the next station quickly.

And the other set of linkage comprises a third link 623 and a fourth link 624 and the inner scraper 12, wherein the third link 623 and the fourth link 624 are located on the other side of the transmission member 32 from the first link 621 and the second link 622. The inner scraper 12 of the second embodiment is provided with a second connecting arm 121, the free end of which second connecting arm 121 is connected to a fourth link 624, and a third link 623 and a fourth link 624. The driving member 31 drives the inner scraper 12 to swing in the opposite direction to the material receiving member 11 through the driving action of the crank 33, the transmission member 32, the third link 623 and the fourth link 624. The final driving member 31 drives the inner scraper 12 to swing away from the driving member 31, so that the material in the receiving member 11 is scraped by the inner scraper 12.

The two ends of the second connecting rod 622 are connected to one side of the receiving member 11 and the same side of the transmission member 32 through the first connecting rod 621, respectively, so that the driving member 31 can drive the receiving member 11 through the transmission action of the transmission member 32 and the first connecting rod 621 and the second connecting rod 622, meanwhile, the two ends of the fourth connecting rod 624 are connected to the connecting arm 121 on one side of the inner scraper 12 and the same side of the transmission member 32 through the third connecting rod 623, respectively, and the driving member 31 can drive the inner scraper 12 through the transmission action of the transmission member 32, the third connecting rod 623 and the fourth connecting rod 624. The driving element 31 is thus able to simultaneously drive the receiving element 11 and the inner scraper 12 about the common axis of rotation 112 in opposite directions when the driving transmission element 32 moves up and down. Thereby achieving mutual scraping of the receiving member 11 and the inner scraper 12.

The first and second embodiments of the present invention have the following advantageous effects:

the hopper scraping device provided by the first embodiment of the utility model is provided with the inner scraping part 1, the inner scraping part 1 comprises the material receiving part 11 and the inner scraping part 12, the material receiving part 11 can receive materials falling from the guide cylinder 4, and the inner scraping part 12 can scrape the materials in the material receiving part 11 to the edge, so that the materials can quickly fall into the next station from the material receiving part 11. In order to clear away residual materials on the inner scraping piece 12, the hopper scraping device is further provided with a side scraping part 2, a side scraping piece 21 is arranged in the side scraping part 2, the materials on the inner scraping piece 12 can be pushed to the edge and fall into the next station, and the effect of clearing away the residual materials is achieved. Therefore, the utility model can effectively solve the problems of slow flowing, residue and the like of the high-viscosity material, greatly improve the flowing speed of the material and improve the production efficiency.

Referring to fig. 2 and 3, in the first embodiment, the inner scraping part 1 further includes a rotating shaft 15, the second gears 612 on both sides of the upper portion of the inner scraping element 12 and the first gears 611 on the first connecting arms 111 on both sides of the receiving element 11 form a gear up-and-down engagement state, the driving element 31 drives the first gears 611 on the first connecting arms 111 to swing back and forth around the rotating shaft 15 through the crank 33, the transmission element 32, the first connecting rod 621, the second connecting rod 622 and the first connecting arms 111, and the first gears 611 drive the second gears 612 on the inner scraping element 12 to swing in the opposite direction through the first gears 611. In order to limit the stroke of the inner scraping element 12 and ensure the efficiency of the movement of the inner scraping element in the material receiving element 11, the inner scraping part 1 further comprises a limiting hole 16, the limiting hole 16 is preferably arranged on the side wall of the material receiving element 11, and the edge of the limiting hole 16 can limit the inner scraping element 12 from swinging from the edge of one end of the material receiving element 11 to the edge of the other end.

The side scraping part 2 further comprises a support rod 22, and the support rod 22 is arranged on two sides of the side scraping part 21 and used for supporting and fixing the side scraping part 21 so as to ensure stable and normal operation of the side scraping part. One end of the support bar 22 is connected to the side scrapers 21 and the other end is hinged to the frame 5, so that the side scrapers 21 can be swung around the hinge point by the support bar 22. The initial position of the support rod 22 is located at the upper edge of the inner scraper 12, and the angle formed by the initial position and the side of the surface of the inner scraper 12 close to the receiving member 11 is an obtuse angle, so when the inner scraper 12 slides outwards from the inner side of the receiving member 11, because the length of the support rod 22 is fixed, the support rod 22 can only swing around the hinge point with the frame 5 in a rotating manner, and the angle formed by the support rod 22 and the lower plane of the inner scraper 12 is an obtuse angle, the support rod 22 can control the side scraper 21 to slide downwards from the upper edge of the inner scraper 12 to the lower edge, so that the material on the inner scraper 12 can be scraped completely. The side scraping part 2 further comprises a resetting piece 23, one end of the resetting piece 23 is fixed on the rack 5, the other end of the resetting piece 23 is connected onto the supporting rod 22, the resetting piece 23 is elastic and preferably is a spring, the resetting piece 23 can enable the side scraping piece 21 to be tightly attached to the surface of the inner scraping piece 12, so that the side scraping piece 21 can scrape materials on the surface of the inner scraping piece 12 cleanly, and meanwhile, the side scraping piece 21 can return to the initial position after completing scraping actions.

The upper edge of interior scraper 12 is close to the bottom opening part of guide cylinder 4, and the lower edge of interior scraper 12 is close to the one side that connects material 11 to accept the material, and consequently interior scraper 12 can all scrape the material in guide cylinder 4 bottom to connect between the material 11 upper surface totally, has higher work efficiency.

The operation principle of the first embodiment is to adopt a crank link mechanism and a gear engagement mechanism, wherein the driving member 31 is installed toward the outer side of the material receiving member 11, and drives the crank 33 to rotate in a reciprocating manner, so as to drive the transmission member 32 to reciprocate in the up-down direction. The transmission member 32 drives the material receiving member 11 to swing through the link mechanism, and the inner scraping member 12 swings in the direction opposite to the material receiving member 11 under the meshing action of the gears of the reverse linkage mechanism.

Referring to fig. 4, the second embodiment works on the principle of using a crank-link mechanism, where the driving member 31 is installed toward the outside of the material receiving member 11, and drives the crank 33 to rotate in a reciprocating manner, so as to drive the transmission member 32 to reciprocate in the up-and-down direction.

Referring to fig. 6, a third embodiment of the present invention discloses a hopper scraping device, which is different from the first embodiment in that the installation direction of the driving member 31 is parallel to the swing plane of the receiving member 11. When the driving member 31 drives the crank 33 to rotate, the connecting rod 32 eccentrically connected with the crank 33 reciprocates in the direction pointing to the outside from the inside of the receiving member 11, so that the receiving member 11 can be driven by the first connecting arm 111 to reciprocate in the inside and outside directions, and the inner scraping member 12 is driven by the gear engagement of the reverse linkage mechanism to swing in the direction opposite to the receiving member 11. Compared with the first embodiment, the third embodiment has the advantages of simple structure and convenience in maintenance.

The working process of the first and third embodiments of the present invention is as follows:

before the inner scraper 12 is operated, the inner scraper 12 is positioned inside the receiving member 11, and the side scraper 21 is positioned at the upper end of the inner scraper 12. When the driving element 31 drives the receiving element 11 to reciprocate between the outer side and the inner side through the crank 33 and the transmission element 32, under the meshing action of the first gear 611 and the second gear 612, the inner scraper 12 swings in the direction opposite to the receiving element 11, i.e. from the inner side to the outer side, so as to gradually push the material falling into the receiving element 11 to the outer side of the receiving element 11, after the inner scraper 12 starts to move, because the support rod 22 connected to the inner scraper 21 forms an obtuse angle with the lower surface of the inner scraper 12, when the inner scraper 12 starts to move from the inner side to the outer side, the side scraper 21 also scrapes from the upper part to the lower part of the inner scraper 12, so as to scrape the material on the inner scraper 12 to the receiving element 11, and push the material on the receiving element 11 to the outer side of the receiving element 11 together, so as to make the material fall into the next station.

Referring to fig. 4, the second embodiment of the present invention operates as follows:

before the inner scraper 12 is operated, the inner scraper 12 is positioned inside the receiving member 11, and the side scraper 21 is positioned at the upper end of the inner scraper 12. The driving member 31 drives the receiving member 11 to reciprocate around the shaft 112 through the transmission action of the crank 33, the transmission member 32, the first connecting rod 621, the second connecting rod 622 and the first connecting arm 111, and at the same time, the driving member 31 drives the inner scraper 12 to swing in the opposite direction to the receiving member 11 through the transmission action of the crank 33, the transmission member 32, the third connecting rod 623 and the fourth connecting rod 624, i.e. swing from the inner side to the outer side, so as to quickly push the material falling into the receiving member 11 from the inner scraper 12 to the outer side of the receiving member 11, after the inner scraper 12 starts to move, because the support rod 22 connected to the side scraper 21 forms an obtuse angle with the lower surface of the inner scraper 12, when the inner scraper 12 starts to move from the inner side to the outer side, the side scraper 21 scrapes the material on the inner scraper 12 from the upper portion to the lower portion of the inner scraper 12, so as to scrape the material on the inner scraper 12 to the receiving member 11 and push the material on the receiving member 11 to the outer side of the receiving member 11, dropping it into the next station.

The hopper scraping device disclosed in the embodiment of the utility model can be applied to a storage hopper of a gravity type automatic loading weighing machine, can also be applied to a weighing hopper after a weighing module is added, and has a wider application range.

The foregoing is a preferred embodiment of the present invention, and it should be noted that it would be apparent to those skilled in the art that various modifications and enhancements can be made without departing from the principles of the utility model, and such modifications and enhancements are also considered to be within the scope of the utility model.

Claims (9)

1. The hopper scraping device is characterized by comprising a rack, a guide cylinder, a driving part, a linkage part, an inner scraping part and a side scraping part, wherein the guide cylinder is fixed on one side of the rack, and the inner scraping part and the side scraping part are both positioned below the guide cylinder;

the inner scraping part comprises a material receiving part and an inner scraping part, the material receiving part is positioned below the guide cylinder and can receive materials falling from the guide cylinder, and the inner scraping part can be slidably erected on one surface of the material receiving part, which receives the materials;

the driving part comprises a driving part, a transmission part and a crank, wherein the movable end of the driving part is connected with the crank, and the driving part can drive the crank to rotate and transmit power to the transmission part;

the side scraping part comprises a side scraping piece which is slidably positioned on the surface of the inner scraping piece, and the side scraping piece can slide from one side of the inner scraping piece to the other side of the inner scraping piece, so that the material on the inner scraping piece is pushed to the edge of the inner scraping piece;

the linkage portion is provided with a reverse linkage mechanism or a linkage link mechanism, the linkage portion is connected with the transmission part, the driving portion enables the material receiving part and the inner scraping part to swing in opposite directions through the reverse linkage mechanism or the link mechanism, and the inner scraping part can push materials in the material receiving part to the edge of the material receiving part.

2. The hopper scraping apparatus as claimed in claim 1, wherein said receiving member is provided with a first connecting arm, a free end of said first connecting arm being connected to said driving member, said driving member being capable of driving said receiving member to oscillate reciprocally by driving said first connecting arm.

3. The hopper scraping device as claimed in claim 1, wherein the upper edge of the inner scraping element is close to the bottom opening of the guide cylinder, and the lower edge of the inner scraping element is close to the material receiving surface of the material receiving element.

4. The hopper scraping device as claimed in claim 1, wherein the side scraping part further comprises support rods, the support rods are arranged on two sides of the side scraping part, one end of each support rod is connected with the side scraping part, and the other end of each support rod is hinged to the rack.

5. The hopper scraping device as recited in claim 4, wherein the support bar is initially positioned at an upper edge of the inner scraper, and the initial position of the support bar forms an obtuse angle with a surface of the inner scraper adjacent to the receiving member.

6. The hopper scraping device according to claim 5, wherein the side scraping portion further comprises a reset member, one end of the reset member is fixed to the frame, the other end of the reset member is connected to the supporting rod, and the reset member has elasticity and enables the side scraping member to be tightly attached to the surface of the inner scraping member.

7. The hopper scraping device as claimed in claim 1, wherein the reverse linkage mechanism comprises a first gear fixed on the upper part of each side of the receiving member and a second gear fixed on the upper part of each side of the inner scraping member, the first gear and the second gear are engaged with each other up and down, and the first gear can drive the second gear to rotate in the opposite direction when rotating.

8. The hopper scraping apparatus of any of claims 1-7, wherein the linkage comprises a first link and a second link, the first link being connected between the second link and the drive member side, the second link being connected to the inner scraper side.

9. The hopper scraping apparatus of claim 8, wherein the linkage further comprises a third link and a fourth link, the third link being connected between the fourth link and a side of the drive member, the fourth link being connected to a side of the inner scraper;

the third connecting rod and the fourth connecting rod are positioned on the other side of the transmission piece, which is far away from the first connecting rod and the second connecting rod.

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