CN218433181U - Bidirectional deviation-rectifying belt conveying device - Google Patents

Abstract

The utility model discloses a bidirectional deviation rectifying belt conveyor, which comprises a supporting frame component, a deviation rectifying cylinder component, a side plate, an end roller component, a scraper component, a driving motor, a belt tensioning roller, a reverse angle wrapping roller and a belt; the support frame assembly comprises a first support frame and a second support frame, side plates are fixedly arranged on two sides of the first support frame and two sides of the second support frame, deviation correcting air cylinder assemblies are fixedly arranged on two sides of each side plate, and the scraper assembly is located on the inner side of each deviation correcting air cylinder assembly and is fixedly arranged on each side plate; the end roller assembly is arranged at the end of the first supporting rack, the driving motor and the driving roller are fixedly arranged on the second supporting rack, and the belt tensioning roller and the reverse wrap angle roller respectively penetrate through the second supporting rack and are arranged below the side plate; and are connected with the driving roll and the air biasing cylinder assembly through belts; driving motor passes through the drive roll and drives further to drive the removal of air cylinder subassembly, the utility model discloses simple structure, reliable and stable, the suitability is strong and the practicality is strong.

Description

Bidirectional deviation-rectifying belt conveying device

Technical Field

The utility model relates to a food industry automated production field, more specifically say, it relates to a two-way belt conveyors that rectifies.

Background

At present, in the baking industry, after food is baked out through an oven, the baked food such as cakes and the like needs to be conveyed through a conveying line, and when the conveying direction is switched in a belt conveying line at present, a belt cannot automatically correct the deviation, so that the stability and the reliability of conveying products through the belt line cannot be ensured, and the products cannot be guaranteed to run in a controllable range.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving above technical problem, and the belt can carry out the automation when switching direction of delivery in the belt conveyor line that provides and rectify, guarantees that equipment carries reliable and stable two-way belt conveyor that rectifies.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a bi-directional deviation correcting belt conveyor comprising: the device comprises a supporting rack assembly, a deviation rectifying air cylinder assembly, a side plate, an end roller assembly, a scraper assembly, a driving motor, a belt tensioning roller, a reverse angle wrapping roller, a belt and a driving roller; the scraper component is positioned on the inner side of the deviation rectifying air cylinder component and is fixedly arranged on the side plate; the end roller assemblies are arranged at the ends of the two ends of the first supporting rack and are connected with the deviation rectifying cylinder assembly; the driving motor and the driving roll are fixedly arranged on a second supporting rack, the driving motor is connected with the driving roll, a belt is arranged on the driving roll, the belt tensioning roll and the reverse wrap angle roll respectively penetrate through the second supporting rack and are arranged below the side plate, and the belt tensioning roll and the reverse wrap angle roll are connected with the driving roll and the air biasing cylinder assembly through the belt; the driving motor drives the belt to move through the driving roller, and the bias air cylinder assembly is driven to move through the belt.

Preferably, the deviation correcting cylinder assembly is composed of a deviation correcting cylinder, a push plate, a first deep groove ball bearing, a deviation correcting roller, a deviation correcting support and a deviation correcting guide rail, the deviation correcting roller is sleeved on the deviation correcting roller, one end of the deviation correcting roller is installed in the deviation correcting support and is fixed with the side plate through the deviation correcting support, the other end of the deviation correcting roller is connected with the first deep groove ball bearing and is sequentially connected with the deviation correcting guide rail, the side plate and the push plate through the first deep groove ball bearing, the deviation correcting cylinder is fixedly installed on the push plate, and the belt is arranged on the deviation correcting cylinder.

Preferably, the scraper assembly comprises a first scraper assembly and a second scraper assembly, the first scraper assembly and the second scraper assembly are respectively and fixedly mounted on the side plates and located on the inner sides of the deviation rectifying air cylinder assemblies, and a first scraper slag receiving disc is mounted at the bottom of the first scraper assembly.

Preferably, the second supporting rack consists of a driving fixed side plate, a second scraper slag receiving disc and a slag receiving disc, the driving fixed side plate is arranged at the upper part of the second supporting rack and is fixedly connected to the side plate, and a driving motor is fixedly mounted on the driving fixed side plate; the second scraper slag receiving disc is arranged on one side of the drive fixed side plate, and the slag receiving disc is arranged below the drive fixed side plate.

Preferably, the second scraper slag receiving disc is arranged below the second scraper assembly.

Preferably, the number of the side plates is two, and the side plates are fixed on the support frame.

Preferably, the end roller assembly comprises a corner roller mandrel, second deep groove ball bearings, rollers, roller middle supports, roller end supports, a cutter body fixing seat and a transition cutter mounting plate, the transition cutter mounting plate is fixedly connected with the cutter body fixing seat, the cutter body is fixedly mounted on two side plates through the cutter body fixing seat and the transition cutter mounting plate in sequence and is located at the head parts of the two side plates, the number of the roller end supports is multiple, the roller end supports are respectively clamped on the cutter body and located at two ends of the cutter body, the number of the middle supports is multiple, the middle supports are uniformly arranged between the roller end supports and are connected with the roller end supports, the rollers are provided with multiple rollers and penetrate through the corner roller mandrel and the roller middle supports, the second deep groove ball bearings are respectively arranged inside two sides of the corner roller mandrel, and the second deep groove ball bearings are connected with the rollers at the outermost side.

Preferably, the number of the deviation rectifying cylinder assemblies is two, and the deviation rectifying cylinder assemblies are respectively arranged at two ends of the two side plates, and the two deviation rectifying cylinder assemblies are arranged in a mirror symmetry manner.

Preferably, the number of the end roller assemblies is two, the end roller assemblies are respectively arranged at the ends of the two ends of the supporting rack assembly, and the two end roller assemblies are arranged in a mirror symmetry manner.

Preferably, the driving roller is provided with a forward spiral groove and a reverse spiral groove, and the driving roller is made of neoprene.

Compared with the prior art, the utility model provides a two-way belt conveyors that rectifies possesses following beneficial effect:

1. the utility model has the advantages that the deviation correcting mechanism is independently controlled, which can ensure the stability and reliability of the products conveyed by the belt line, and can rapidly adjust the deviation correcting amount of the belt when the belt is switched to run reversely, thereby ensuring the products to run in a controllable range; meanwhile, the service life of the belt can be ensured.

2. The utility model discloses a setting up the support of rectifying and supporting as the fixed rotation point of rectifying the roller, driving the push pedal when rectifying the cylinder and stretching out and will rectifying the roller and push forward, it is inboard to form the slant and promote the belt, and the belt atress difference will form the lateral deviation, realizes the effect of rectifying, reasonable in design, and the practicality is strong.

3. The second deep groove ball bearings are arranged inside the two ends of the roller, so that the roller can flexibly run when a belt runs, and the belt conveying and deviation rectifying effects are facilitated; the end roller assembly part can arrange the roller end supports, the roller middle supports and the rollers in different quantities according to the widths of different belts, and the adaptability is high.

4. The utility model discloses a two cylinder components of rectifying are the mirror symmetry setting, and the belt conveyor line to two opposite directions that can be convenient is two-way rectifies a deviation, reaches the purpose of two-way belt conveyor that rectifies.

5. The utility model discloses a set up two mirror symmetry's end roller assembly, can conveniently support the nimble operation of belt conveyor line of two opposite directions, be favorable to the transport of belt and two-way rectifying, the cylinder subassembly that rectifies in the cooperation reaches the purpose that two-way rectifying belt carried.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the overall structure of the present invention;

FIG. 3 is a third schematic view of the overall structure of the present invention;

fig. 4 is a schematic view of the overall structure of the present invention;

fig. 5 is a schematic structural view of a second supporting frame of the present invention;

FIG. 6 is a schematic view of the side plate structure of the present invention;

fig. 7 is a first schematic structural view of the end roller assembly of the present invention;

FIG. 8 is a schematic structural view of a second end roller assembly according to the present invention;

fig. 9 is a schematic structural view of a corner roller spindle of the end roller assembly of the present invention;

FIG. 10 is a schematic view of the structure of the deviation rectifying cylinder assembly of the present invention;

FIG. 11 is a schematic view of the structure of the driving roll of the present invention;

fig. 12 is a schematic view of the structure of the reverse wrap angle roller of the present invention.

In the figure: 1. supporting a frame assembly; 11. a first support frame; 12. a second support frame; 121. Driving the fixed side plate; 122. a second scraper slag receiving disc; 123. a slag receiving disc; 2. a deviation rectifying cylinder assembly; 21. a deviation rectifying cylinder; 22. pushing the plate; 23. a first deep groove ball bearing; 24. a deviation rectifying roller; 25. a deviation rectifying roller; 26. a deviation rectifying support; 27. correcting a guide rail; 3. a side plate; 4. a tip roller assembly; 41. a corner roller mandrel; 42. a second deep groove ball bearing; 43. a roller; 44. A roller-in-roller bracket; 45. a roller end bracket; 46. a cutter body; 47. a cutter body fixing seat; 48. a transition knife mounting plate; 5. a scraper assembly; 51. a first scraper assembly; 511. a first scraper slag receiving disc; 52. a second scraper assembly; 6. a drive motor; 7. a belt tensioning roller; 8. a reverse wrap angle roller; 9. a belt; 10. a drive roll; 101. a helical groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Referring to fig. 1-12, the bidirectional deviation rectifying belt conveyor of the present invention includes a supporting frame assembly 1, a deviation rectifying cylinder assembly 2, a side plate 3, an end roller assembly 4, a scraper assembly 5, a driving motor 6, a belt tensioning roller 7, a reverse angle wrapping roller 8, a belt 9 and a driving roller 10; the supporting rack assembly 1 comprises a first supporting rack 11 and a second supporting rack 12, side plates 3 are fixedly mounted on two sides of the first supporting rack 11 and the second supporting rack 12, deviation correcting air cylinder assemblies 2 are fixedly mounted on two sides of the side plates 3, and the scraper assembly 5 is located on the inner sides of the deviation correcting air cylinder assemblies 2 and is fixedly mounted on the side plates 3; the end roller assemblies 4 are arranged at the ends of the two ends of the first supporting rack 11 and are connected with the deviation rectifying air cylinder assembly 2; the driving motor 6 and the driving roll 10 are both fixedly installed on a second supporting rack 12, the driving motor 6 is connected with the driving roll 10, a belt 9 is arranged on the driving roll 10, the belt tensioning roll 7 and the reverse wrap angle roll 8 respectively penetrate through the second supporting rack 12 and are installed below the side plate 3, and are both connected with the driving roll 10 and the air biasing cylinder assembly 2 through the belt 9; the driving motor 6 drives the belt 9 to move through the driving roller 10, and drives the air biasing cylinder assembly 2 to move through the belt 9. The utility model adopts the cylinder deviation rectifying structure, the deviation problem can occur in the running process of the belt conveyor line, the belt conveyor line adopting the cylinder deviation rectifying mechanism can automatically rectify the deviation, in particular, the bidirectional belt conveyor line is more helpful, and when the conveying direction 1 is designed, the deviation rectifying cylinder component 2 opposite to the conveying direction 1 plays a role in rectifying the deviation; when the conveying direction is switched to 2, the deviation rectifying cylinder assembly 2 in the opposite direction relative to the conveying direction 2 plays a role in rectifying deviation; this automatic structure of rectifying is independent control, can ensure that belt line carries the product reliable and stable, switches when belt 9 reverse operation, can quick adjustment belt 9 rectify the volume, guarantees that the product moves at controllable within range.

As shown in fig. 10, the cylinder assembly 2 of rectifying a deviation is by cylinder 21, push pedal 22, first deep groove ball bearing 23, the roller 24 of rectifying a deviation, the roller 25 of rectifying a deviation, the support 26 of rectifying a deviation and the guide rail 27 of rectifying a deviation constitute, the roller 25 suit of rectifying a deviation is on the roller 24 of rectifying a deviation, the one end of the roller 25 of rectifying a deviation is installed in the support 26 of rectifying a deviation, and is fixed with curb plate 3 through the support 26 of rectifying a deviation, the other end of the roller 25 of rectifying a deviation is connected with first deep groove ball bearing 23, and is connected with the guide rail 27 of rectifying a deviation, curb plate 3 and push pedal 22 in proper order through first deep groove ball bearing 23, cylinder 21 fixed mounting of rectifying a deviation is on push pedal 22, belt 9 sets up on the cylinder 21 of rectifying a deviation. The utility model discloses a setting up the rotation point support of rectifying support 26 as fixed roller 25 of rectifying, driving push pedal 22 when rectifying cylinder 21 stretches out and will rectifying roller 24 and push forward, it is inboard to form slant promotion belt 9, and the belt 9 atress difference will form the lateral deviation, realizes the effect of rectifying.

As shown in fig. 1, the scraper assembly 5 comprises a first scraper assembly 51 and a second scraper assembly 52, wherein the first scraper assembly 51 and the second scraper assembly 52 are respectively fixedly mounted on the side plate 3 and are located on the inner side of the deviation rectifying cylinder assembly 2, and the first scraper slag receiving disc 10 is mounted at the bottom of the first scraper assembly 51. The utility model discloses a set up scraper subassembly 5, can thoroughly scrape residue thing and drop of water etc. totally, set up first scraper and connect slag pan 10 simultaneously and can conveniently hold residue thing and drop of water etc..

As shown in fig. 5, the second supporting frame 12 of the present invention is composed of a driving fixed side plate 121, a second scraper slag receiving pan 122 and a slag receiving pan 123, the driving fixed side plate 121 is disposed on the upper portion of the second supporting frame 12 and is fixedly connected to the side plate 3, and the driving fixed side plate 121 is fixedly mounted with a driving motor 6; the second scraper slag receiving disc 122 is arranged on one side of the driving fixed side plate 121, and the slag receiving disc 123 is arranged below the driving fixed side plate 121. The utility model discloses a set up fixed curb plate 121 of drive, can make things convenient for fixed mounting driving motor 6, through setting up slag receiving disc 123, the residue thing that holds first scraper subassembly 51 that can correspond and drop etc. through setting up second scraper slag receiving disc 122, the residue thing that holds second scraper subassembly 52 that can correspond and drop etc. simple in design, reasonable, the practicality is strong.

As shown in fig. 1, 2, 4 and 6, the number of the side plates 3 is two, and the side plates are all fixed on the supporting frame assembly 1. The utility model discloses a set up curb plate 3, can effectively guarantee the product conveying between two sets of curb plates 3 on the conveyer belt, play the effect that a supported other spare parts simultaneously again.

As shown in fig. 2, 7, 8, 9, end roller assembly 4 includes support 44, roller end support 45 in corner roller dabber 41, second deep groove ball bearing 42, roller 43, the roller, cutter body 46, cutter body fixing base 47 and transition sword mounting panel 48, transition sword mounting panel 48 and cutter body fixing base 47 fixed connection, cutter body 46 loops through cutter body fixing base 47, transition sword mounting panel 48 fixed mounting on both sides board 3, and is located the prelude of both sides board 3, roller end support 45 is 2 in quantity, clamps respectively on cutter body 46, and is located cutter body 46's both ends, well support 44 is a plurality of in quantity, and even setting is between roller end support 45, and is connected with roller end support 45, roller 43 is provided with a plurality ofly, and runs through support 44 fixed connection in corner roller dabber 41 and the roller, the inside deep groove ball bearing 42 that respectively is provided with in both sides of corner roller dabber 41, second deep groove ball bearing 42 all is connected with the roller 43 in the outside. The second deep groove ball bearings 42 are arranged in the two ends of the roller 43, so that the roller 43 can flexibly run when the belt runs, and the conveying and the deviation rectifying effects of the belt 9 are facilitated; the end roller assembly 4 can be arranged in different numbers with different widths of the belt 9, and has a strong adaptability to the roller end bracket 45, the roller middle bracket 44 and the roller 43.

As shown in figure 1, the cylinder assembly 2 quantity of rectifying is two, and sets up respectively in the both ends of both sides board 3, two cylinder assemblies 2 of rectifying are the mirror symmetry setting. The utility model can conveniently carry out bidirectional deviation rectification on the belt conveyor line in two opposite directions by arranging two deviation rectification cylinder assemblies 2 with mirror symmetry, thereby achieving the purpose of bidirectional deviation rectification belt conveying;

as shown in fig. 1, the number of the end roller assemblies 4 is two, and the end rollers are respectively arranged at the two ends of the supporting frame assembly 1, and the two end roller assemblies 4 are arranged in a mirror symmetry manner. Through setting up two end roller assembly 4 of mirror symmetry, can conveniently support the nimble operation of belt conveyor line of two opposite directions, be favorable to the transport of belt 9 and two-way rectifying, the cylinder assembly 2 that cooperatees rectifies reaches the purpose of two-way rectifying belt conveyor.

As shown in FIG. 11, the driving roll 10 is provided with a forward spiral groove and a backward spiral groove 101, and the rubber coating material of the driving roll 10 is neoprene. The utility model discloses an adopt the outer rubber coating material of steel roll body to be the drive roll 10 of neoprene to set up positive and negative twice helicla flute 101, can the adhesion effect of effectual increase rubber coating, wrap up in the glue through the surface simultaneously, can drive the belt operation.

The utility model discloses a theory of operation does: the belt conveying line has the deviation problem in the running process, the belt conveying line adopting the cylinder deviation rectifying mechanism can carry out automatic correction, and particularly the bidirectional belt conveying line is more helpful; when the belt 9 is conveyed towards the advancing direction, the belt 9 deviates close to the left side, the air cylinder at the outlet end pushes forwards, and the belt can return to the right side; when the belt 9 is excessively aligned to the right side, the cylinder can move back, the belt 9 is aligned to the left side, and the belt 9 operates within a certain controllable range repeatedly, so that the continuous, stable and reliable conveying process of the belt is effectively ensured. When the switching belt runs in the reverse direction, the effect of the cylinder deviation rectifying mechanism is the same, and when the conveying direction 1 is designed, the deviation rectifying cylinder assembly 2 in the reverse direction relative to the conveying direction 1 plays a role in rectifying deviation; when the conveying direction is switched to 2, the deviation rectifying cylinder assembly 2 in the opposite direction relative to the conveying direction 2 plays a role in rectifying deviation; this automatic structure of rectifying is independent control, can ensure that belt line carries the product reliable and stable, switches when belt 9 reverse operation, can quick adjustment belt 9 rectify the amount of partially, guarantees that the product moves at controllable within range.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims (10)

1. The utility model provides a two-way belt conveyor that rectifies which characterized in that: the device comprises a supporting rack assembly (1), a deviation rectifying air cylinder assembly (2), a side plate (3), an end roller assembly (4), a scraper assembly (5), a driving motor (6), a belt tensioning roller (7), a reverse angle wrapping roller (8), a belt (9) and a driving roller (10);

the support frame assembly (1) comprises a first support frame (11) and a second support frame (12), side plates (3) are fixedly mounted on two sides of the first support frame (11) and the second support frame (12), deviation correcting air cylinder assemblies (2) are fixedly mounted on two sides of the side plates (3), and the scraper assembly (5) is located on the inner sides of the deviation correcting air cylinder assemblies (2) and is fixedly mounted on the side plates (3);

the end roller assemblies (4) are arranged at the ends of the two ends of the first supporting rack (11) and are connected with the deviation rectifying air cylinder assembly (2);

the driving motor (6) and the driving roll (10) are fixedly arranged on a second supporting rack (12), the driving motor (6) is connected with the driving roll (10), a belt (9) is arranged on the driving roll (10), the belt tensioning roll (7) and the reverse wrap angle roll (8) respectively penetrate through the second supporting rack (12) to be arranged below the side plate (3), and are connected with the driving roll (10) and the air biasing cylinder assembly (2) through the belt (9);

the driving motor (6) drives the belt (9) to move through the driving roller (10), and drives the air-biasing cylinder assembly (2) to move through the belt (9).

2. The bidirectional deviation rectifying belt conveying device according to claim 1, characterized in that: the correcting cylinder assembly (2) is composed of a correcting cylinder (21), a push plate (22), a first deep groove ball bearing (23), a correcting roller (24), a correcting roller (25), a correcting support (26) and a correcting guide rail (27), the correcting roller (25) is sleeved on the correcting roller (24), one end of the correcting roller (25) is installed in the correcting support (26) and fixed with the side plate (3) through the correcting support (26), the other end of the correcting roller (25) is connected with the first deep groove ball bearing (23) and sequentially connected with the correcting guide rail (27), the side plate (3) and the push plate (22) through the first deep groove ball bearing (23), the correcting cylinder (21) is fixedly installed on the push plate (22), and the belt (9) is arranged on the correcting cylinder (21).

3. The bidirectional deviation rectifying belt conveying device according to claim 1, characterized in that: the scraper component (5) comprises a first scraper component (51) and a second scraper component (52), the first scraper component (51) and the second scraper component (52) are respectively and fixedly installed on the side plates (3) and located on the inner side of the deviation rectifying cylinder component (2), and a first scraper slag receiving disc (511) is installed at the bottom of the first scraper component (51).

4. The bidirectional deviation rectifying belt conveying device according to claim 1, characterized in that: the second supporting rack (12) is composed of a driving fixed side plate (121), a second scraper slag receiving disc (122) and a slag receiving disc (123), the driving fixed side plate (121) is arranged on the upper portion of the second supporting rack (12) and is fixedly connected to the side plate (3), and a driving motor (6) is fixedly mounted on the driving fixed side plate (121);

the second scraper slag receiving disc (122) is arranged on one side of the driving fixing side plate (121), and the slag receiving disc (123) is arranged below the driving fixing side plate (121).

5. The bidirectional deviation rectifying belt conveying device according to claim 4, characterized in that: the second scraper slag receiving disc (122) is arranged below the second scraper component (52).

6. The bidirectional deviation correcting belt conveying device according to claim 1, characterized in that: the number of the side plates (3) is two, and the side plates are all fixed on the support frame assembly (1).

7. The bidirectional deviation rectifying belt conveying device according to claim 1, characterized in that: the end roller assembly (4) comprises a corner roller mandrel (41), a second deep groove ball bearing (42), rollers (43), roller middle supports (44), roller end supports (45), a cutter body (46), a cutter body fixing seat (47) and transition cutter mounting plates (48), wherein the transition cutter mounting plates (48) are fixedly connected with the cutter body fixing seat (47), the cutter body (46) is fixedly mounted on the two side plates (3) sequentially through the cutter body fixing seat (47) and the transition cutter mounting plates (48) and located at the head parts of the two side plates (3), the number of the roller end supports (45) is 2, the roller end supports are respectively clamped on the cutter body (46) and located at the two ends of the cutter body (46), the number of the middle supports (44) is multiple, the middle supports are uniformly arranged between the roller end supports (45) and connected with the roller end supports (45), the rollers (43) are provided with multiple mandrels, the corner roller mandrel is fixedly connected with the roller middle supports (44) through the corner roller mandrel (41), the second deep groove ball bearing (42) is arranged inside the two sides of each side of the roller mandrel (41), and the outermost side of the second deep groove ball bearing (43) is connected with the roller middle supports (43).

8. The bidirectional deviation rectifying belt conveying device according to claim 2, characterized in that: the number of the deviation-rectifying air cylinder assemblies (2) is two, the deviation-rectifying air cylinder assemblies are respectively arranged at two ends of the two side plates (3), and the two deviation-rectifying air cylinder assemblies (2) are arranged in a mirror symmetry mode.

9. The bidirectional deviation rectifying belt conveying device according to claim 1, characterized in that: the number of the end roller assemblies (4) is two, the end roller assemblies are respectively arranged at the two ends of the supporting rack assembly (1), and the two end roller assemblies (4) are arranged in a mirror symmetry mode.

10. The bidirectional deviation correcting belt conveying device according to claim 1, characterized in that: the driving roller (10) is provided with a forward spiral groove and a reverse spiral groove (101), and the rubber coating material of the driving roller (10) is neoprene.

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