CN220362325U - Grinding mechanism and filament cutter - Google Patents

Abstract

The utility model discloses a grinding mechanism and a tobacco cutter, wherein the grinding mechanism comprises a bracket, a rotatable knife roll, a movable knife grinder and a reciprocating device are arranged on the bracket, a plurality of blades for cutting tobacco leaves are arranged on the circumference of the knife roll, a grinding wheel for grinding the blades is arranged on the knife grinder, the reciprocating device is used for driving the knife grinder to do linear reciprocating motion and stop working when the knife grinder reaches a designated position, a feeding component is arranged on the knife grinder, the feeding component is used for driving the grinding wheel to feed or retract along the radial direction of the knife roll when the knife grinder reaches the designated position, and the grinding wheel grinds a groove structure at the edge part of the blade. According to the utility model, the cutter blade is ground at the designated position and a groove structure is formed, so that the filament cutter can be switched from normal filament cutting to fixed-length filament cutting, and the production requirement of fixed-length tobacco shreds is met.

Description

Grinding mechanism and filament cutter

Technical Field

The utility model belongs to the technical field of filament cutters, and particularly relates to a grinding mechanism and a filament cutter.

Background

Tobacco shredding is an important process in the tobacco treatment process, and a shredder is the main equipment in the tobacco treatment process. At present, the fine cigarette products in the domestic tobacco industry are gradually increased, the overlong cut tobacco is unfavorable for rolling production, and the physical properties of cigarettes can be influenced, so that cigarette manufacturers have higher requirements on the aspect of controlling the length of the cut tobacco in the production process.

The length of the cut tobacco mainly depends on the size of the tobacco leaf pieces, and the size of the raw material piece tobacco is often determined in the threshing and redrying process, so that a fixed-length shredding method is generally adopted for controlling the length of the cut tobacco on a cut tobacco production line. The fixed-length shredding method generally adopts a zigzag blade shredding method, but the corresponding blade and related parts have higher manufacturing cost, can not be directly applied to similar equipment, and limits the application range; and the adjustability is poor, when a filament cutter device needs to cut filaments with fixed length, a series of parts such as a knife pressing plate and a knife blade can be replaced to switch to the filament cutting mode with fixed length, and the workload is large.

The Chinese patent with the application number of 201320044997.1 discloses a knife grinder of a tobacco leaf shredder, which is provided with a grinding wheel roller, wherein the grinding wheel roller is a grinding wheel group formed by axially overlapping at least three grinding wheels with two diameters, and the diameters of two adjacent grinding wheels are different; when the knife sharpening device is used, the knife sharpening device is arranged above or beside the brackets on two sides of the knife roller body, the axes of the grinding wheels are respectively parallel to the cutting edges of the shredding knives arranged on the knife roller body, and the grinding wheels are driven to rotate by the motor and the transmission mechanism to grind the shredding knives on the knife roller body. Before grinding, the cutting edge of the shredding cutter is flat, so the shredding cutter can only be ground by a large-diameter grinding wheel at the initial stage of grinding, and after the shredding cutter is ground into a tooth-shaped cutter with the technological requirement of the tobacco shred length by the large-diameter grinding wheel, the shredding cutter is ground by two grinding wheels with different diameters, namely a large diameter grinding wheel and a small grinding wheel, so that the high cutting edge and the low cutting edge of the shredding cutter are kept sharp. Although the groove structure can be ground on the blade of the shredding knife in the patent, the grinding wheel roller is adopted for grinding, so that the weight is large, the disassembly and assembly are difficult, the position of the grinding wheel roller is adjusted by adopting the height adjusting screw, and the grinding precision is not high.

The present utility model has been made in view of this.

Disclosure of Invention

The utility model aims to solve the technical problems of overcoming the defects of the prior art, and provides the grinding device, which not only can grind the blade on the knife roll, but also can grind the groove structure at the designated position simultaneously by arranging the feeding component and the grinding wheel on the knife grinder, so that the blade becomes a saw-tooth knife, the requirements of a shredder on grinding the blade and switching the blade from normal shredding to fixed-length shredding are met, the labor cost is saved, and the efficiency of the shredder from normal shredding to fixed-length shredding is improved.

In order to solve the technical problems, the utility model adopts the basic conception of the technical scheme that: a grinding mechanism comprising:

a bracket;

the knife roll is rotatably arranged on the bracket, and a plurality of blades for cutting tobacco leaves are arranged on the circumference of the knife roll;

the knife sharpening device is movably arranged on the bracket, and a grinding wheel for grinding the blade is arranged on the knife sharpening device;

the reciprocating motion device is arranged on the bracket and used for driving the knife sharpening device to do linear reciprocating motion and suspending the operation when the knife sharpening device reaches a designated position;

and the feeding assembly is arranged on the knife sharpening device and is used for driving the grinding wheel to feed or retract along the radial direction of the knife roller when the knife sharpening device reaches a specified position, and the grinding wheel grinds a groove structure at the edge part of the blade.

Preferably, the rotation direction of the cutter roller is the same as the rotation direction of the grinding wheel, and is used for stably grinding the blade.

Preferably, the width of the grinding wheel is equal to the width of the groove structure, and the grinding wheel is used for forming the groove structure ground by the grinding wheel at one time.

Further, the reciprocating means works alternately with the feed assembly, and a plurality of groove structures are ground in the extending direction of the blade portion.

Further, the width of the groove structure is equal to the distance between every two adjacent groove structures, and the cutting blade is used for cutting fixed-length tobacco shreds with the length being the width of the groove structure.

Further, the grinding mechanism further comprises a detection module, wherein the detection module is used for detecting whether the knife sharpening device reaches a designated position or not and detecting the feeding distance and the retreating distance of the grinding wheel along the radial direction of the knife roller.

Further, the grinding mechanism further comprises a processing module, wherein the processing module is used for collecting and analyzing the data measured by the detection module and accurately regulating and controlling the working states of the reciprocating device, the feeding assembly and the knife sharpening device according to the analysis result.

Preferably, the grinding mechanism further comprises a storage module, wherein the storage module is used for storing data information of the designated position, the turning-back position and the initial position; the data information can be called by the processing module.

Further, when the grinding wheel grinds the blade, the knife roller keeps a working state of rotary cutting.

In the scheme, when the knife roller keeps a working state of rotary cutting, the grinding wheel grinds the blade, and in the process that the feeding assembly drives the grinding wheel to feed back along the radial direction of the knife roller, a plurality of blades arranged on the circumferential direction of the knife roller are all ground into a groove structure at the same position, so that the grinding efficiency of the grinding wheel on the blades is effectively improved.

Further, the reciprocating device includes:

the driving component is arranged on the bracket and used for providing driving force for the knife sharpening device to do linear reciprocating motion;

the transmission assembly is connected with the driving assembly and the knife sharpening device and is used for driving the knife sharpening device to do linear reciprocating motion;

the shaft end assembly is arranged on the bracket, connected with the transmission assembly and used for fixing the transmission assembly on the bracket.

Further, the driving assembly includes:

the driving motor is used for providing power for the motion of the transmission assembly;

one end of the speed reducer is connected with the driving motor, and the other end of the speed reducer is connected with the transmission assembly and used for regulating and controlling the movement speed of the transmission assembly;

the first connecting support is arranged on the support, connected with the driving motor and the speed reducer and used for fixing the driving motor and the speed reducer on the support.

Preferably, the driving assembly further comprises a pulley comprising a transmission belt, the pulley being used for connecting the driving motor and the decelerator through the transmission belt; the driving motor has a rotating speed feedback function, and when the knife sharpening device reaches the turning-back position, the driving motor is reversed through calculating the rotating speed and the reciprocating travel distance of the belt transmission, so that the knife sharpening device is returned to the initial position.

Further, the transmission assembly includes:

the ball screw is connected with the driving assembly and is driven by the driving assembly to rotate;

the ball nut is sleeved on the ball screw and used for converting the rotary motion of the ball screw into the self linear reciprocating motion;

the ball nut support is sleeved on the ball screw and connected with the ball nut, and is used for ensuring that the ball nut makes linear reciprocating motion relative to the ball screw;

and one end of the connecting piece is connected with the ball nut support, and the other end of the connecting piece is connected with the knife sharpening device and is used for transmitting the linear reciprocating motion of the ball nut to the knife sharpening device.

In the scheme, the reciprocating motion device drives the knife sharpening device to do linear reciprocating motion, meanwhile, the knife sharpening device and the feeding assembly work alternately, the grinding wheel connected with the feeding assembly grinds a plurality of groove structures with the same width in the extending direction of the blade edge part of the blade, and the width of the groove structure is equal to the distance between every two adjacent groove structures, so that the blade is ground into a zigzag knife, and the filament cutter is converted from normal filament cutting to fixed-length filament cutting.

In addition, in the shredding process, if the blade becomes dull when cutting the tobacco leaves, resulting in poor cutting effect, the processing module regulates and controls the feeding assembly to drive the grinding wheel to feed to a position where the grinding wheel is tangent to the blade part, so that the grinding wheel and the blade part perform tool setting, after the tool setting is completed, the reciprocating device drives the knife grinding device to move along the extending direction of the blade part, the blade part of the blade is ground by using the grinding wheel, when the knife grinding device reaches the turning-back position, the feeding assembly drives the grinding wheel to retract, the grinding wheel is separated from contact with the blade, and the reciprocating device drives the knife grinding device to retract to an initial position along the direction opposite to the extending direction of the blade part, so that the blade part of the blade is kept so as to facilitate shredding.

In the above scheme, the grinding mechanism obtains the data of the designated position, the turning-back position and the initial position by calling the data information pre-stored in the storage module arranged in the grinding mechanism, the data information in the storage module can be regulated according to the actual requirement of a user, and the data information of the storage module is used for providing basis for the processing module to regulate and control the working states of the reciprocating motion device, the feeding assembly and the knife sharpening device.

The utility model also provides a shredder, which is provided with the grinding mechanism.

After the technical scheme is adopted, compared with the prior art, the utility model has the following beneficial effects:

1. according to the grinding mechanism provided by the utility model, the feeding component and the grinding wheel are arranged on the knife sharpening device, so that the blade on the knife roller can be ground, and the groove structure can be ground at the designated position, so that the blade becomes a zigzag knife, the requirements of the filament cutter on grinding the blade and switching the blade from normal filament cutting to fixed-length filament cutting are met, the labor cost is saved, and the efficiency of the filament cutter for switching from normal filament cutting to fixed-length filament cutting is improved;

2. according to the utility model, when the knife roll keeps a working state of rotary cutting, the grinding wheel grinds the blade, and in the process that the feeding assembly drives the grinding wheel to feed back along the radial direction of the knife roll, a plurality of blades arranged on the circumferential direction of the knife roll are all ground into a groove structure at the same position, so that the grinding efficiency of the grinding wheel on the blades is effectively improved;

3. according to the utility model, the processing module is used for realizing high-precision grinding of the blade by collecting and analyzing the data measured by the detection module and accurately regulating and controlling the working states of the reciprocating device, the feeding assembly and the knife sharpening device according to the analysis result;

4. the grinding mechanism has the advantages of simple structure, low manufacturing cost, small operation and maintenance workload, easy maintenance and good economic benefit and application prospect.

The following describes the embodiments of the present utility model in further detail with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. It is evident that the drawings in the following description are only examples, from which other drawings can be obtained by a person skilled in the art without the inventive effort. In the drawings:

FIG. 1 is a schematic view of a grinding mechanism and shredder in accordance with an embodiment of the present utility model;

FIG. 2 is a schematic side view of a grinding mechanism and shredder according to an embodiment of the present utility model;

FIG. 3 is a schematic view of the grinding surface of the grinding wheel in accordance with the embodiment of the present utility model;

FIG. 4 is a schematic view of the structure of the edge after grinding in the embodiment of the utility model;

fig. 5 is an enlarged view showing the structure of the edge I after grinding in the embodiment of the present utility model.

In the figure: 1. a bracket; 2. a knife roll; 3. a linear guide rail; 4. a blade; 5. grinding wheel; 6. a fixing member; 21. a reciprocating motion device; 31. a knife sharpening device; 41. a drive assembly; 411. a driving motor; 412. a speed reducer; 413. a first connection support; 51. a transmission assembly; 511. a ball screw; 512. a ball nut support; 513. a ball nut; 514. a connecting piece; 61. a shaft end assembly; 611. a shaft end support; 612. a second connection support; 601. a first fixing member; 602. a second fixing member; 603. and a third fixing member.

It should be noted that these drawings and the written description are not intended to limit the scope of the inventive concept in any way, but to illustrate the inventive concept to those skilled in the art by referring to the specific embodiments.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions in the embodiments will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model, and the following embodiments are used to illustrate the present utility model, but are not intended to limit the scope of the present utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

The domestic tobacco industry has increasingly fine cigarette products, and the overlong cut tobacco is unfavorable for the rolling of the products. For controlling the length of the cut tobacco, a fixed-length cutting method is generally adopted, and the fixed-length cutting method generally adopts a saw-tooth blade for cutting, but the manufacturing cost of the saw-tooth blade and related parts is higher at present; and a series of parts such as a cutter pressing plate and a cutter blade need to be replaced when the cutting machine is used for cutting the filament to a fixed length, so that the workload is high. In order to solve the problem, the utility model designs the grinding mechanism which can grind the saw-tooth-shaped blade on the blade of the shredder according to the requirement of a user, and the width of the groove structure on the blade is equal to the distance between every two adjacent groove structures, so that the ground blade cuts fixed-length tobacco shreds with the length equal to the width of the groove structure, the cutter changing cost is saved, the cutter changing efficiency of the shredder is improved, and the requirement of the user on quick switching from normal shredding to fixed-length shredding of the shredder is met. The method comprises the following steps:

as shown in fig. 1 to 5, the present utility model provides a grinding mechanism including: the knife roll comprises a bracket 1, a knife roll 2, a linear guide rail 3, a knife sharpening device 31, a reciprocating device 21, a feeding assembly, a fixing piece 6 and a telescopic protective cover. Blades 4 are arranged on the periphery of the knife roller 2; the knife sharpening device 31 is provided with a grinding wheel 5; the knife sharpening device 31 is connected with the linear guide rail 3; the linear guide rail 3 is fixed on the bracket 1; the reciprocating device 21 comprises a driving assembly 41, a transmission assembly 51 and a shaft end assembly 61; the driving assembly 41 comprises a driving motor 411, a speed reducer 412, a first connecting support 413 and a belt pulley; the transmission assembly 51 includes a ball screw 511, a ball nut mount 512, a ball nut 513, and a connector 514; the shaft end assembly 61 comprises a shaft end support 611 and a second connecting support 612; the fixing member 6 includes a first fixing member 601, a second fixing member 602, and a third fixing member 603.

As an embodiment, the present utility model provides a grinding mechanism, as shown in fig. 1 to 5, which includes a holder 1, a cutter roll 2, a knife sharpening device 31, a reciprocating device 21, a feeding assembly (not shown), a fixing member 6, and a retractable guard (not shown).

The support 1 is provided with a plurality of mounting positions, and the support 1 is used for mounting the knife sharpening device 31, the knife roller 2 and the reciprocating device 21.

The cutter roller 2 is rotatably arranged on the bracket 1, a plurality of blades 4 for cutting tobacco leaves are arranged on the circumference of the cutter roller 2, and the cutter roller 2 is used for installing the blades 4 and driving the blades 4 to rotationally cut.

The knife sharpening device 31 is movably arranged on the bracket 1, the knife sharpening device 31 is provided with a grinding wheel 5 for grinding the blade 4, and the knife sharpening device 31 is used for installing the grinding wheel 5.

And one side of the bracket 1 is also provided with a linear guide rail 3 which is connected with the knife sharpening device 31, and the linear guide rail 3 is used for installing the knife sharpening device 31 and limiting the linear reciprocating motion range of the knife sharpening device 31 on the bracket 1.

The reciprocating device 21 is arranged on the bracket 1, is connected with the knife sharpening device 31, and is used for driving the knife sharpening device 31 to do linear reciprocating motion and suspending the operation when the knife sharpening device 31 reaches a designated position.

And the feeding assembly is arranged on the knife sharpening device 31 and is used for driving the grinding wheel 5 to feed or retract along the radial direction of the knife roller 2 when the knife sharpening device 31 reaches a specified position, and the grinding wheel 5 grinds a groove structure at the edge part of the blade 4.

The grinding mechanism further comprises a telescopic protective cover which is connected with the driving assembly 41, the transmission assembly 51 and the shaft end assembly 61 and used for preventing external impurities and dust from entering the connection parts of the driving assembly 41, the transmission assembly 51, the shaft end assembly 61 and the transmission assembly 51 to cause movement clamping stagnation.

The telescopic protective cover comprises a first protective cover and a second protective cover. The first protective cover is connected with the driving assembly 41 and the transmission assembly 51 and is used for preventing external impurities and dust from entering the connection part of the driving assembly 41 and the transmission assembly 51; the second shield connects the transmission assembly 51 and the shaft end assembly 61 for preventing foreign matters and dust from entering the junction of the shaft end assembly 61 and the transmission assembly 51.

As shown in fig. 2, the rotation direction of the cutter roll 2 is the same as the rotation direction of the grinding wheel 5 for stable grinding of the blade 4.

After being ground by the grinding wheel 5, the groove structure is internally provided with a groove edge parallel to the edge part of the blade 4, and the groove edge is used for matching with the edge part of the blade 4 to finish the fixed-length tobacco cutting process of tobacco leaves.

As shown in fig. 3 to 5, the width L of the grinding wheel 5 is equal to the width L of the groove structure for one-step forming of the groove structure ground by the grinding wheel 5.

It should be noted that, the one-time molding is that the feeding assembly feeds once, and the grinding wheel 5 directly grinds a single complete groove structure, and the groove structure does not need to be ground again.

In addition, according to the requirements of users, the grinding wheels 5 with different widths can be arranged on the knife sharpening device 31 to grind a groove structure corresponding to the width L of the grinding wheel 5, so that the blade 4 can cut tobacco with different fixed lengths.

As shown in fig. 4, the reciprocating means 21 works alternately with the feed assembly, and a plurality of groove structures are ground in the extending direction of the edge portion of the blade 4.

As shown in fig. 5, the width L of the groove structure is equal to the distance L between the two groove structures, and the cutting blade 4 is used for cutting fixed-length tobacco shreds with the length being the width L of the groove structure.

The grinding mechanism further comprises a detection module for detecting whether the knife sharpening device 31 reaches a specified position, and detecting a feeding distance and a retracting distance of the grinding wheel 5 in the radial direction of the cutter roller 2.

The grinding mechanism further comprises a processing module and a storage module, wherein the processing module is used for collecting and analyzing the data measured by the detection module and accurately regulating and controlling the working states of the reciprocating device 21, the feeding assembly and the knife sharpening device 31 according to the analysis result; the storage module is used for storing data information of the designated position, the turning-back position and the initial position; the data information can be called by the processing module for use; the data information in the storage module can be adjusted according to the actual demands of users.

When the grinding wheel 5 grinds the blade 4, the cutter roll 2 maintains a working state of rotary cutting.

In the above scheme, when the knife roller 2 keeps a working state of rotary cutting, the grinding wheel 5 grinds the blade 4, and in the process that the feeding assembly drives the grinding wheel 5 to retract along the radial direction of the knife roller 2, a plurality of blades 4 arranged on the circumference of the knife roller 2 are all ground into a groove structure at the same position, so that the grinding efficiency of the grinding wheel 5 on the blade 4 is effectively improved.

As shown in fig. 1, the reciprocating means 21 includes: a drive assembly 41, a transmission assembly 51, and a shaft end assembly 61.

The driving component 41 is arranged on the bracket 1 and is used for providing driving force for the knife sharpening device 31 to do linear reciprocating motion.

The transmission assembly 51 is connected with the driving assembly 41 and the knife sharpening device 31, and is used for driving the knife sharpening device 31 to do linear reciprocating motion.

The shaft end assembly 61 is arranged on the bracket 1, is connected with the transmission assembly 51, and is used for fixing the transmission assembly 51 on the bracket 1.

In the above scheme, the driving assembly 41 is connected with one end of the transmission assembly 51, the shaft end assembly 61 is connected with the other end of the transmission assembly 51, the connection between the knife sharpening device 31 and the transmission assembly 51 is located between the driving assembly 41 and the shaft end assembly 61, and the transmission assembly 51 drives the knife sharpening device 31 to perform linear reciprocating motion between the driving assembly 41 and the shaft end assembly 61.

As shown in fig. 1, the driving assembly 41 includes a driving motor 411, a decelerator 412, a first connection support 413, and a pulley.

The driving motor 411 has a rotation speed feedback function for providing power for the motion of the transmission assembly 51, and when the knife sharpening device 31 reaches the turning position, the driving motor 411 is reversed by calculating the number of rotations and the reciprocating travel distance of the belt transmission, so that the knife sharpening device 31 is retracted to the initial position.

One end of the decelerator 412 is connected to the driving motor 411, and the other end is connected to the transmission assembly 51, so as to regulate the movement speed of the transmission assembly 51.

The first connection support 413 is connected to the driving motor 411 and the decelerator 412, and is used for fixing the driving motor 411 and the decelerator 412 to the bracket 1.

The pulley comprises a belt for connecting the drive motor 411 and the decelerator 412 via the belt.

As shown in fig. 1, the transmission assembly 51 includes a ball screw 511, a ball nut 513, a ball nut mount 512, and a connector 514.

The ball screw 511 is connected to the driving unit 41 for rotational movement driven by the driving unit 41.

The ball nut 513 is sleeved on the ball screw 511, and is used for converting the rotation motion of the ball screw 511 into the self linear reciprocating motion, and fixing one end of the second protection cover.

The ball nut support 512 is sleeved on the ball screw 511 and connected with the ball nut 513, so as to ensure that the ball nut 513 makes linear reciprocating motion relative to the ball screw 511.

The connecting piece 514 has one end connected to the ball nut support 512 and the other end connected to the knife sharpening device 31, and is used for transmitting the linear reciprocating motion of the ball nut 513 to the knife sharpening device 31.

As shown in fig. 1, the shaft end assembly 61 includes a shaft end support 611, a second connection support 612.

The shaft end support 611 is connected to one end of the ball screw shaft 511 for fixing and supporting the ball screw shaft 511.

The second connecting support 612 is connected to the shaft end support 611 for fixing the shaft end support 611 to the bracket 1.

As shown in fig. 1, the grinding mechanism further includes a fixing member 6, and the fixing member 6 includes a first fixing member 601, a second fixing member 602, and a third fixing member 603.

The first fixing member 601 is disposed on a side of the first connection support 413, which is close to the transmission assembly 51, and is used for fixing one end of the first protection cover.

The second fixing member 602 is disposed on a side of the ball nut support 512 near the ball screw 511, and is used for fixing the other end of the first protection cover.

The third fixing piece 603 is disposed on one side of the shaft end support 611 near the ball screw 511, and is used for fixing the other end of the second protection cover.

In the above scheme, the reciprocating motion device 21 drives the knife sharpening device 31 to do linear reciprocating motion, and simultaneously the knife sharpening device and the feeding assembly work alternately, the grinding wheel 5 connected with the feeding assembly grinds a plurality of groove structures with the same width in the extending direction of the blade edge part of the blade 4, and the distance between every two adjacent groove structures is equal to the width of the groove structures, so that the blade 4 is grinded into a zigzag knife, and the filament cutter is converted from normal filament cutting to fixed length filament cutting.

In addition, in the shredding process, if the blade 4 has a blunted edge in the tobacco leaf cutting process, so that the cutting effect is poor, the processing module regulates and controls the feeding assembly to drive the grinding wheel 5 to feed to a position where the grinding wheel 5 is tangent to the edge part, so that the grinding wheel 5 and the edge part perform tool setting, after the tool setting is completed, the reciprocating device 21 drives the knife grinding device 31 to move along the extending direction of the edge part, the edge part of the blade 4 is ground by using the grinding wheel 5, when the knife grinding device 31 reaches the turning-back position, the feeding assembly drives the grinding wheel 5 to retract, the grinding wheel 5 is out of contact with the blade 4, and the reciprocating device 21 drives the knife grinding device 31 to retract to an initial position along the opposite direction of the extending direction of the edge part, so that the edge part of the blade 4 is kept sharp, and the shredding process is convenient.

For detecting whether the knife sharpening device moves to a turning position or an initial position, the detection can be performed by calculating the revolution number of the driving motor and the reciprocating travel distance of the driving belt; detection may also be performed by configuring the detection element. After the knife sharpening device reaches the turning-back position, the processing module regulates and controls the driving motor to turn back, so that the knife sharpening device returns to the initial position.

The utility model also provides a shredder, which is provided with the grinding mechanism.

The foregoing description is only a preferred embodiment of the present utility model, and the present utility model is not limited to the above-mentioned embodiment, but is not limited to the above-mentioned embodiment, and any simple modification, equivalent change and modification made by the technical matter of the present utility model can be further combined or replaced by the equivalent embodiment without departing from the scope of the technical solution of the present utility model.

Claims (10)

1. A grinding mechanism, comprising:

a bracket (1);

the knife roller (2) is rotatably arranged on the bracket (1), and a plurality of blades (4) for cutting tobacco leaves are arranged on the circumference of the knife roller (2);

the knife sharpening device (31) is movably arranged on the bracket (1), and a grinding wheel (5) for grinding the blade (4) is arranged on the knife sharpening device (31);

the reciprocating motion device (21) is arranged on the bracket (1) and is used for driving the knife sharpening device (31) to do linear reciprocating motion and suspending the operation when the knife sharpening device (31) reaches a specified position;

the feeding assembly is arranged on the knife sharpening device (31) and is used for driving the grinding wheel (5) to feed or retract along the radial direction of the knife roller (2) when the knife sharpening device (31) reaches a specified position, and the grinding wheel (5) grinds a groove structure at the edge part of the blade (4).

2. A grinding mechanism according to claim 1, characterized in that the reciprocating means (21) are operated alternately with the feed assembly for grinding a number of groove structures in the direction of extension of the blade portion.

3. A grinding mechanism according to claim 2, characterized in that the width of the groove structures is equal to the distance between every two adjacent groove structures for the blade (4) to cut tobacco of a fixed length having the width of the groove structures.

4. A grinding mechanism according to claim 2, further comprising a detection module for detecting whether the sharpening device (31) has reached a prescribed position, and for detecting the feed distance and the withdrawal distance of the grinding wheel (5) in the radial direction of the cutter roller (2).

5. The grinding mechanism of claim 4, further comprising a processing module for collecting and analyzing the data measured by the detection module and precisely controlling the operating states of the reciprocating device (21), the feeding assembly and the sharpening device (31) according to the analysis result.

6. A grinding mechanism according to claim 2, characterized in that the knife roller (2) is kept in a rotary cutting operating state when the grinding wheel (5) grinds the blade (4).

7. A grinding mechanism according to claim 1, characterized in that the reciprocating means (21) comprise:

the driving assembly (41) is arranged on the bracket (1) and is used for providing driving force for the knife sharpening device (31) to do linear reciprocating motion;

the transmission assembly (51) is connected with the driving assembly (41) and the sharpening device (31) and is used for driving the sharpening device (31) to do linear reciprocating motion;

the shaft end assembly (61) is arranged on the bracket (1) and connected with the transmission assembly (51) and is used for fixing the transmission assembly (51) on the bracket (1).

8. A grinding mechanism according to claim 7, wherein the drive assembly (41) comprises:

a drive motor (411) for providing power for movement of the transmission assembly (51);

one end of the speed reducer (412) is connected with the driving motor (411), and the other end of the speed reducer is connected with the transmission assembly (51) and used for regulating and controlling the movement speed of the transmission assembly (51);

the first connecting support (413) is arranged on the support (1), is connected with the driving motor (411) and the speed reducer (412), and is used for fixing the driving motor (411) and the speed reducer (412) on the support (1).

9. A grinding mechanism according to claim 7, characterized in that the transmission assembly (51) comprises:

a ball screw (511) connected to the driving unit (41) and rotated by the driving unit (41);

the ball nut (513) is sleeved on the ball screw (511) and is used for converting the rotary motion of the ball screw (511) into the self linear reciprocating motion;

the ball nut support (512) is sleeved on the ball screw (511) and connected with the ball nut (513) for ensuring that the ball nut (513) does linear reciprocating motion relative to the ball screw (511);

and one end of the connecting piece (514) is connected with the ball nut support (512), and the other end of the connecting piece is connected with the knife sharpening device (31) and is used for transmitting the linear reciprocating motion of the ball nut (513) to the knife sharpening device (31).

10. A filament cutter having a grinding mechanism as claimed in any one of claims 1 to 9.