CN111185957A

CN111185957A - Straw rotary-cut device

Info

Publication number: CN111185957A
Application number: CN202010060898.7A
Authority: CN
Inventors: 王金龙; 苑成东; 王甜雨
Original assignee: Weifang University
Current assignee: Weifang University
Priority date: 2020-01-19
Filing date: 2020-01-19
Publication date: 2020-05-22
Anticipated expiration: 2040-01-19
Also published as: CN111185957B

Abstract

The invention discloses a rotary cutting device for straws, which is used for cutting straws which are rotatably conveyed on a straw supporting shaft and comprises a base structure body, a hollow rotor assembly rotatably arranged in the base structure body, a power mechanism arranged on the base structure body and used for driving the hollow rotor assembly to rotate, a plurality of rotary cutters which are distributed along the circumferential direction and rotatably arranged on the hollow rotor assembly, and an angle control mechanism which is circumferentially and slidably arranged in the base structure body and used for controlling the angle of the rotary cutters so as to complete the cutting of the straws; the straw supporting shaft extends into the hollow rotor assembly, and the cutting edge of the rotary cutter faces the straw on the straw supporting shaft. The straw cutting machine can finish straw cutting without rotating the straw for one circle, and has high cutting speed and short cutting period; the cutting angle of the rotary cutter is easy to control, and the cutting effect is good; the parts are few, the structure is simple, and the operation is stable and reliable.

Description

Straw rotary-cut device

Technical Field

The invention belongs to the technical field of pipe cutting, and particularly relates to a rotary cutting device for a suction pipe.

Background

The straw is a hollow plastic or paper product, and is mainly used for drinking beverages in cups, the diameter of the straw is about 0.5cm, and when the straw is used for drinking beverages such as yoghourt, pearl milk tea and the like, the straw with larger diameter is used, and the diameter of the straw with larger diameter is 1.5 cm. The straw is a long cylindrical hollow pipe after being extruded and molded by an extruder; the long cylindrical hollow pipe rotationally conveyed on the straw supporting shaft must be cut according to the required length by using a cutting device to form a finished product.

The existing straw cutting device comprises a slide rail base 1, two sliding blocks 11 which are slidably mounted on the slide rail base 1, and a lead screw assembly 12 for driving the sliding blocks 11 to slide, wherein wall plates 13 are arranged on the sliding blocks 11, a connecting beam 14 and a hob supporting rod 15 are arranged between the two wall plates 13, and the hob supporting rod 15 is provided with a hob assembly 16. The straw support shaft 17 is stationary and straws received on the straw support shaft 17 are transported from one end wall plate 13 to the other end wall plate 13 at a certain speed while the straws themselves are rotating. The roller assembly 16 reciprocates with the wall plate 13 and cuts the straw at the same rate that the straw is advanced. The above straw cutting device has the following disadvantages: 1. the slide rail base 1 is easy to wear and has poor reliability because of a large number of parts mounted on the slide block 11, heavy weight, and needs to reciprocate. 2. The straw must rotate a circle too much to cut off, the cutting speed is slow, the period is long, and the production efficiency is influenced. 3. The hob assembly 16 and the straw supporting shaft 17 are impacted, the knife edge and the straw supporting shaft 17 are easily damaged, the distance between the hob assembly 16 and the straw supporting shaft 17 is difficult to control, the impact is generated at a short time, the cutting is continuous at a long time, and the cutting effect is influenced.

In view of this, need to improve on the prior art urgently, research and development design a straw cutting device that cutting speed is fast, cutting effect is good and the operation is reliable and stable to improve production efficiency, reduction in production cost.

Disclosure of Invention

The invention aims to overcome the defects in the prior art, and the technical problem to be solved is to provide the straw rotary-cutting device which is high in cutting speed, good in cutting effect and stable and reliable in operation, so that the production efficiency is improved, and the production cost is reduced.

The technical scheme adopted by the invention for solving the technical problems is as follows: a rotary cutting device for straws is used for cutting straws which are rotatably conveyed on a straw supporting shaft and comprises a base structure body, a hollow rotor assembly rotatably arranged in the base structure body, a power mechanism arranged on the base structure body and used for driving the hollow rotor assembly to rotate, a plurality of rotary cutters which are distributed along the circumferential direction and rotatably arranged on the hollow rotor assembly, and an angle control mechanism which is circumferentially and slidably arranged in the base structure body and used for controlling the angle of the rotary cutters so as to complete the cutting of the straws;

the straw supporting shaft extends into the hollow rotor assembly, and the cutting edge of the rotary cutter faces the straw on the straw supporting shaft.

Further, the base structure includes a base and a base cover covering the base; the base and the base cover are both provided with a first mounting groove for mounting the angle control mechanism and a second mounting groove for mounting the hollow rotor assembly; the top of the base cover is provided with a fan-shaped avoiding opening.

Further, the hollow rotor assembly comprises a rotor body in a hollow stepped shaft shape, a bearing is sleeved outside the rotor body, and the bearing is installed in the second installation groove;

the rotary cutter is arranged at the end part of the rotor body, and the end part is also provided with a cover plate for axially limiting the rotary cutter.

Furthermore, a plurality of mounting shafts and limiting pins which are circumferentially arranged and axially extend are arranged at the end part of the rotor body; the rotary cutter deviates from the radial direction of the rotor body and is rotatably installed on the installation shaft, and the limiting pin is used for limiting the rotation of the rotary cutter.

Further, the rotary cutter comprises a cutter handle part, an arc-shaped cutter blade part and a conical rolling part arranged at the tail end of the cutter handle part; the arc-shaped blade part is provided with a mounting hole for rotating and mounting.

Further, the angle control mechanism comprises a track controller which is circumferentially and slidably arranged in the first mounting groove, a conical rolling element track which is in conical fit with the conical rolling element, and a power assembly which is used for controlling the track controller to rotate; the track controller and the track of the conical rolling part are both in annular structures;

and a motion conversion structure for converting the rotary motion of the track controller into the axial motion of the conical rolling element track is arranged between the track controller and the conical rolling element track.

Further, the motion conversion structure comprises a spiral groove, a lug matched with the spiral groove and a track sliding guide rod axially installed in the base structure body; the track of the conical rolling element is provided with a mounting hole for the track sliding guide rod to pass through;

the spiral groove is arranged on the inner peripheral wall of the track controller or the outer peripheral wall of the conical rolling element track; correspondingly, the convex block is arranged on the outer peripheral wall of the conical rolling element track or the inner peripheral wall of the track controller.

Further, the power assembly comprises a controller rod arranged on the track controller and an electric control telescopic gripper fixed on the base cover; the hand grip part of the electric control telescopic hand grip is connected with the controller rod through the fan-shaped avoidance port.

Furthermore, two conical surface rolling pieces are symmetrically arranged at the tail end of the cutter handle part; the two conical surface rolling part tracks matched with the conical surfaces of the conical surface rolling parts are symmetrically arranged, and the two symmetrical track controllers are arranged in the first mounting groove in a circumferential sliding mode.

Further, the power mechanism comprises a motor arranged on the base structure body, a driving belt wheel connected with an output shaft of the motor, a rotor belt wheel connected with the hollow rotor assembly, and a belt wound on the driving belt wheel and the rotor belt wheel.

Due to the adoption of the technical scheme, the beneficial effects are as follows:

the invention discloses a rotary cutting device for a suction pipe, which comprises a base structure body, a hollow rotor assembly, a power mechanism, a plurality of rotary cutters and an angle control mechanism, wherein the hollow rotor assembly is rotatably arranged in the base structure body; the suction pipe supporting shaft extends into the hollow rotor assembly, and the cutting edge of the rotary cutter faces the suction pipe on the suction pipe supporting shaft; the rotary cutter rotates at a high speed along with the hollow rotor assembly which rotates at a high speed (when the rotary cutter does not cut, the rotary cutter idles at a high speed), the angle control mechanism controls the angle change of the rotary cutter within a certain time interval, and the angle of the rotary cutter is automatically recovered due to centrifugal force after the rotary cutting of the suction pipe is carried out (the rotary suction pipe which rotates is equal to the static rotary cutter which rotates at a high speed). The cutting of the suction pipe can be completed without rotating the suction pipe for one circle, and the cutting speed is high and the period is short; the cutting angle of the rotary cutter is easy to control, and the cutting effect is good; the parts are few, the structure is simple, and the operation is stable and reliable.

Drawings

FIG. 1 is a schematic structural view of a conventional straw cutting device;

FIG. 2 is a schematic structural view of the rotary cutting device for straws of the present invention;

FIG. 3 is an exploded view of the structure of FIG. 1;

FIG. 4 is a top view of FIG. 1;

FIG. 5 is a cross-sectional view of the structure at A-A in FIG. 4;

FIG. 6 is a sectional view of the structure at B-B in FIG. 4;

FIG. 7 is an enlarged schematic view of the structure at C in FIG. 6;

FIG. 8 is a schematic view of the base cover of FIG. 3 from another perspective;

fig. 9 is a schematic view of the power mechanism of fig. 3;

FIG. 10 is a schematic view of the mounting arrangement of the rotary cutter, angle control mechanism and hollow rotor assembly of FIG. 3;

FIG. 11 is an exploded view of the structure of FIG. 10;

FIG. 12 is an exploded view of the mounting structure of the rotary cutter and idler subassembly of FIG. 11;

FIG. 13 is an exploded view of the angle control mechanism of FIG. 11;

FIG. 14 is a reference view of the mating of the rotary cutter and the cone roller track;

FIG. 15 is a reference view showing a state where the rotary cutting apparatus for straws of the present invention is not cutting the straws;

FIG. 16 is a view showing a state where the rotary cutting apparatus for straws of the present invention performs cutting of straws;

in the figure, 1-a slide rail base, 11-a slide block, 12-a screw rod assembly, 13-a wall plate, 14-a connecting beam, 15-a hob supporting rod, 16-a hob assembly and 17-a suction pipe supporting shaft;

2-base structure, 21-base, 211-first mounting groove, 212-second mounting groove, 213-semi-annular partition, 22-base cover, 221-first mounting groove, 222-second mounting groove, 223-semi-annular partition, 224-sector avoiding opening, 3-hollow rotor assembly, 31-rotor body, 311-first shaft section, 312-second shaft section, 313-third shaft section, 314-fourth shaft section, 32-bearing, 33-cover plate, 34-mounting shaft, 35-spacing pin, 4-power mechanism, 41-motor, 42-driving pulley, 43-rotor pulley, 44-belt, 5-rotary cutter, 51-cutter handle part, 52-arc cutter part, 53-conical rolling bearing, 531-external conical surface, 54-blade, 55-mounting hole, 6-angle control mechanism, 61-track controller, 611-ear, 62-conical surface rolling element track, 621-mounting hole, 622-internal conical surface, 63-power assembly, 631-controller rod, 632-electric control telescopic gripper, 633-gripper part, 634-U-shaped opening, 64-motion conversion structure, 641-spiral groove, 642-convex block, 643-track sliding guide rod, 7-straw supporting shaft, 8-straw.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description of the invention is merely for convenience and should not be taken to limit the invention.

As shown in fig. 2 to 8, the rotary cutting device for straws of the present embodiment is used for cutting straws 8 (which are transported forward while rotating) that are transported on a straw support shaft 7 (fixed). The straw rotary-cutting device comprises a base structure body 2, a hollow rotor assembly 3 rotatably installed in the base structure body 2, a power mechanism 4 installed on the base structure body 2 and used for driving the hollow rotor assembly 3 to rotate, a plurality of rotary cutters 5 which are distributed along the circumferential direction and rotatably installed on the hollow rotor assembly 3, and an angle control mechanism 6 which is installed in the base structure body 1 in a circumferential sliding mode and used for controlling the angle of the rotary cutters 5 to complete cutting of a straw 8; the suction pipe supporting shaft 7 penetrates through the base structure body 2 and extends into the hollow rotor assembly 3, and the cutting edge 54 of the rotary cutter 5 faces the suction pipe 8 on the suction pipe supporting shaft 7.

In this embodiment, the base structure 2 is a split structure, and includes a base 21 and a base cover 22 covering the base 21; the base 21 and the base cover 22 are respectively provided with a

first mounting groove

211 and 221 for mounting the angle control mechanism 6 and a

second mounting groove

212 and 222 for mounting the hollow rotor assembly 3; the top of the base cover 22 is provided with a fan-shaped avoidance port 224 (avoidance power assembly 63), and the side part is provided with an avoidance notch (avoidance power mechanism 4). The first mounting groove 211 and the first mounting groove 221 form an annular groove, and the second mounting groove 212 and the second mounting groove 222 form another annular groove. The bases 21 of both sides of the first mounting groove 211 are provided with semi-annular partitions 213, the base covers 22 of both sides of the first mounting groove 221 are provided with semi-annular partitions 223, and the semi-annular partitions 213 and the corresponding semi-annular partitions 223 form annular partitions.

In the present embodiment, as shown collectively in fig. 9 to 13, the hollow rotor assembly 3 includes a rotor body 31 in a hollow stepped shaft shape, the rotor body 31 includes a first shaft section 311, a second shaft section 312, a third shaft section 313 and a fourth shaft section 314 connected in sequence, the first shaft section 311 has a smaller diameter than the second shaft section 312, the second shaft section 312 has a smaller diameter than the third shaft section 313, and the third shaft section 313 has a larger diameter than the fourth shaft section 314; the second shaft section 312 is sleeved with a bearing 32, and the outer ring of the bearing 32 is fixedly arranged in the

second mounting grooves

212 and 222; the rotary cutter 5 is installed at the end of the fourth shaft section 314 of the rotor body 31, and the end is further provided with a cover plate 33 (provided with an insertion hole adapted to the installation shaft 34) for axially limiting the rotary cutter 5. The end of the fourth shaft section 314 of the rotor body 31 is provided with a plurality of (three in this embodiment) circumferentially arranged and axially extending mounting shafts 34 and limit pins 35; the rotary cutter 5 deviates from the radial direction of the rotor body 31 and is rotatably mounted on the mounting shaft 34 (for facilitating the control of the subsequent cutting angle), and the limiting pin 35 is used for limiting the rotation of the rotary cutter 5, so as to prevent the occurrence of an error state that the rotating of an excessive magnitude, for example, the cutting edge 54 of the rotary cutter 5 rotates to the inner conical surface 622.

In this embodiment, the rotary cutter 5 has a reverse 7-shaped structure, and includes a handle portion 51, an arc-shaped blade portion 52, and a conical rolling member disposed at the end of the handle portion 51; the arcuate blade portion 52 adjacent the cutting edge 54 is provided with a mounting hole 55 for pivotal mounting (which will be understood to be an eccentric mounting). The conical rolling element may be a conical rolling bearing 53 or a conical roller as long as rotation is achieved and the outer surface is an outer conical surface 531. Similarly, one or two conical rolling elements may be provided, and in order to improve the stability, two conical rolling bearings 53 are symmetrically provided at the end of the tool shank 51.

In this embodiment, the power mechanism 4 includes a motor 41 disposed on the base cover 22, a driving pulley 42 connected to an output shaft of the motor 41, a rotor pulley 43 fixedly connected to the first shaft 311 of the hollow rotor assembly 3, and a belt 44 wound around the driving pulley 42 and the rotor pulley 43.

In this embodiment, the angle control mechanism 6 includes a track controller 61 circumferentially slidably mounted in the first mounting

grooves

211, 221, a tapered roller track 62 that is tapered-fitted to a tapered roller (tapered roller bearing 53), and a power unit 63 for controlling the track controller 61 to rotate; the track controller 61 and the conical rolling element track 62 are both in an annular structure; a motion conversion structure 64 for converting the rotational motion of the track controller 61 into the axial motion of the tapered roller track 62 and further controlling the angle of the rotary cutter 5 is provided between the track controller 61 and the tapered roller track 62. The taper angles of the outer conical surface 531 of the conical rolling bearing 53 and the inner conical surface 622 of the conical rolling member track 62 are the same and are matched in a tangent manner, and the running track radius of the conical rolling bearing 53 can be controlled by the axial movement of the conical rolling member track 62 by utilizing the characteristic of conical matching, so that the aim of controlling the angle of the rotary cutter 5 is fulfilled.

The motion conversion structure 64 includes a spiral groove 641, a projection 642 adapted to the spiral groove 641, and a rail sliding guide 643 axially installed between the

semi-annular partition plates

213, 223 at two sides in the base structure 1; the tapered roller rail 62 is provided with a mounting hole 621 through which a rail slide guide 643 passes. If the spiral groove 641 is formed on the inner peripheral wall of the track controller 61, the projection 642 is formed on the outer peripheral wall of the tapered roller track 62; if the spiral groove 641 is provided on the outer peripheral wall of the tapered roller rail 62, the projection 642 is provided on the inner peripheral wall of the rail controller 61.

Wherein, the power assembly 63 comprises a controller rod 631 arranged on the ear 611 of the track controller 61 and an electric control telescopic handle 632 fixed on the base cover 22; a hand grip 633 of the electrically controlled telescopic hand grip 632 is connected with a controller rod 631 located in the base structure 2 through a fan-shaped avoidance port 224; the electrically controlled telescopic gripper 632 is provided with a U-shaped opening 634 for snap-engagement with the controller lever 631.

In this embodiment, since the two tapered rolling bearings 53 are symmetrically provided at the distal end of the tool shank 51, two tapered rolling element rails 62 that are fitted to the tapered surfaces of the tapered rolling bearings 53 are also symmetrically provided, and the inner circumferential sliding rail controller 61 in the first mounting

groove

211, 221 is provided with two symmetrical rail controllers 61. The controller lever 631 is fixed between the ears 611 of the two track controllers 61.

As shown in fig. 10 and 14 to 16, the control principle of the angle control mechanism 6 is: the electrically controlled telescopic gripper 632 is controlled by an electrical signal (interval) to be telescopic, a thrust is given to the controller rod 631 to force the track controller 61 to rotate by a certain angle, meanwhile, the motion conversion structure 64 enables the conical rolling element track 62 to axially move along the track sliding guide rod 643, and the change of the radius of the running track of the conical rolling bearing 53 is realized by means of the inner conical surface 622 and the outer conical surface 531 which are matched with each other, so that the purpose of controlling the angle of the rotary cutter 5 to finish cutting is achieved; after cutting is completed, the electric control telescopic gripper 632 is controlled by an electric signal to restore to an initial state, the rotary cutter 5 realizes the restoration of the initial state of the radius of the running track of the conical rolling bearing 53 under the action of centrifugal force, and the conical rolling bearing 53 and the conical rolling element track 62 are always in conical surface fit in the whole process.

In summary, in the straw rotary cutting device of the present invention, the rotary cutter 5 rotates at a high speed along with the hollow rotor assembly 3 rotating at a high speed (when the rotary cutter is not cutting, the rotary cutter idles at a high speed), the angle control mechanism 6 controls the angle change of the rotary cutter 5 at intervals, and the angle of the rotary cutter 5 automatically recovers due to centrifugal force after the rotary cutting of the straw 8 is performed (the rotary straw 8 is equal to stationary with respect to the rotary cutter 5 rotating at a high speed). The cutting of the suction pipe can be completed without rotating the suction pipe 8 for one circle, and the cutting speed is high and the period is short; the cutting angle of the rotary cutter 5 is easy to control, and the cutting effect is good; the parts are few, the structure is simple, and the operation is stable and reliable.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. A rotary cutting device for straws is used for cutting straws which are rotatably conveyed on a straw supporting shaft and is characterized by comprising a base structure body, a hollow rotor assembly rotatably arranged in the base structure body, a power mechanism arranged on the base structure body and used for driving the hollow rotor assembly to rotate, a plurality of rotary cutters which are distributed along the circumferential direction and rotatably arranged on the hollow rotor assembly, and an angle control mechanism which is circumferentially and slidably arranged in the base structure body and used for controlling the angle of the rotary cutters so as to complete the cutting of the straws;

2. The rotary straw cutting device according to claim 1, wherein the base structure comprises a base and a base cover covering the base; the base and the base cover are both provided with a first mounting groove for mounting the angle control mechanism and a second mounting groove for mounting the hollow rotor assembly; the top of the base cover is provided with a fan-shaped avoiding opening.

3. The rotary straw cutting device according to claim 2, wherein the hollow rotor assembly comprises a rotor body in the shape of a hollow stepped shaft, and a bearing is sleeved outside the rotor body and is mounted in the second mounting groove;

4. The rotary straw cutting device according to claim 3, wherein the end of the rotor body is provided with a plurality of circumferentially arranged and axially extending mounting shafts and limit pins; the rotary cutter deviates from the radial direction of the rotor body and is rotatably installed on the installation shaft, and the limiting pin is used for limiting the rotation of the rotary cutter.

5. The rotary straw cutting device according to claim 2, wherein the rotary cutter comprises a handle portion, an arc-shaped blade portion and a conical rolling member disposed at a distal end of the handle portion; the arc-shaped blade part is provided with a mounting hole for rotating and mounting.

6. The rotary straw cutting device according to claim 5, wherein the angle control mechanism comprises a track controller circumferentially slidably mounted in the first mounting groove, a tapered roller track in tapered engagement with the tapered roller, and a power assembly for controlling the track controller to rotate; the track controller and the track of the conical rolling part are both in annular structures;

7. The rotary straw cutting device according to claim 6, wherein the motion conversion structure comprises a spiral groove, a projection adapted to the spiral groove, and a rail sliding guide rod axially mounted in the base structure; the track of the conical rolling element is provided with a mounting hole for the track sliding guide rod to pass through;

8. The rotary straw cutting device according to claim 6, wherein the power assembly comprises a controller rod disposed on the track controller and an electrically controlled retractable grip secured to the base cover; the hand grip part of the electric control telescopic hand grip is connected with the controller rod through the fan-shaped avoidance port.

9. The rotary straw cutting device according to claim 6, wherein the two conical rolling members are symmetrically arranged at the end of the handle portion; the two conical surface rolling part tracks matched with the conical surfaces of the conical surface rolling parts are symmetrically arranged, and the two symmetrical track controllers are arranged in the first mounting groove in a circumferential sliding mode.

10. The rotary straw cutting device according to claim 1, wherein the power mechanism comprises a motor disposed on the base structure, a driving pulley connected to an output shaft of the motor, a rotor pulley connected to the hollow rotor assembly, and a belt wound around the driving pulley and the rotor pulley.