CN112369210B

CN112369210B - Broken cutter of material for agricultural bundling machine

Info

Publication number: CN112369210B
Application number: CN202011283470.5A
Authority: CN
Inventors: 朱新振
Original assignee: Lingbi Taishun Machinery Co ltd
Current assignee: Anhui Keruiqi Machinery Co ltd
Priority date: 2020-11-17
Filing date: 2020-11-17
Publication date: 2022-07-19
Anticipated expiration: 2040-11-17
Also published as: CN112369210A

Abstract

The invention discloses a material crushing cutter for an agricultural bundling machine, which comprises: the cutting device comprises a metal frame, a pair of side plates, a bottom plate and a pair of curved arms are welded in the metal frame, and a cutting groove is formed in the upper surface of the bottom plate; the pickup device is formed at the front end of the metal frame, is in rotating connection with the metal frame through a pair of curved arms, and comprises a pair of rotating frames, a rotating shaft and a pull rod; the first crushing device is formed on the metal frame at the front end of the bottom plate and is positioned below the pickup device; the second crushing device is formed between the pair of side plates, the operation of the invention is simple, the working efficiency of the bundling machine is greatly improved, and the speed and the quality of crushing materials can be improved.

Description

Broken cutter of material for agricultural bundling machine

Technical Field

The invention belongs to the technical field of agricultural bundling machine equipment, and particularly relates to a material crushing cutter for an agricultural bundling machine.

Background

Straw, known as ligusticum in ancient times, also known as straw grass, refers to the stem and leaf parts of the stems and leaves of the mature and threshed gramineous crops such as rice, wheat and corn, wherein the straw of rice is often called as rice straw and ligusticum oryzae, and the straw of wheat is called as wheat straw. Before industrialization, farmers use the straws in a very diverse way. For example, in southern China, people dry and store rice straws, can be used as household goods such as firewood, woven seat cushions, mattresses, brooms and the like, pave livestock rings, feed livestock, stack compost and return to the field, even be used for manufacturing roofs of simple houses and the like, little direct waste is generated, in the last two decades of China, due to the popularization of coal, electricity and natural gas, the requirement on straws in rural areas is reduced, a large amount of straws are treated into a serious social problem, although laws are forbidden, most local farmers still directly burn the straws in the fields to cause air pollution, fire disasters, abnormal take-off and landing of airplanes and other consequences, the best method for solving the problem is to collect the straws, if mechanical assistance is not used, a large amount of labor is needed, the production cost is increased, and under the action of a bundling machine, the labor investment can be greatly reduced, the production cost is reduced;

However, the parts used for crushing straw materials on the bundling machine on the market are simple in structure and poor in effect.

Disclosure of Invention

The invention aims to provide a material crushing cutter for an agricultural bundling machine, which aims to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme:

a material crushing cutter for an agricultural baler comprises:

the cutting device comprises a metal frame, a pair of side plates, a bottom plate and a pair of curved arms are welded in the metal frame, and a cutting groove is formed in the upper surface of the bottom plate;

furthermore, the arranged metal frame is a frame of the whole device, has certain strong hardness and can protect the device, and the upper surface of the bottom plate is provided with a cutting groove which is matched with the first cutter in the second crushing device;

the pickup device is formed at the front end of the metal frame, is in rotating connection with the metal frame through a pair of curved arms, and comprises a pair of rotating frames, a rotating shaft and a pull rod;

furthermore, the arranged pick-up device can guide the stalks and support the stalks for cutting, so that the situation that the cut stalks are blocked on the first crushing device is prevented;

the first crushing device is formed on the metal frame at the front end of the bottom plate and is positioned below the pickup device;

Further, the arranged first crushing device performs coarse cutting on the stalks;

the second crushing device is formed between the pair of side plates;

furthermore, the second crushing device is arranged to finely cut the stalks.

As a preferable scheme of the invention, each rotating frame comprises a rotating disc, a rotating hole is formed in the center of the rotating disc, five connecting pipes are arrayed on the rotating disc at equal intervals along the circumferential direction, and a connecting beam is fixedly connected between every two connecting pipes.

As a preferred scheme of the invention, a rotating shaft is coaxially sleeved between a pair of the rotating discs, two ends of the pulling rod are respectively sleeved and fixed with the end parts of the connecting pipes at two sides, pulling nails are equidistantly welded on the pulling rod, the pickup device further comprises an installation disc which is positioned at the outer side of the rotating frame at the left side and is provided with a circular sliding rail and a locking hole in the middle, one end of the connection rod is fixedly connected with the end part of the corresponding pulling rod, the other end of the connection rod is rotatably connected with the installation disc, two ends of the rotating shaft penetrate through the rotating discs and the installation disc at two sides, a locking member is coaxially sleeved at the penetrated end of the rotating shaft, and a locking rod is coaxially connected with the rotating shaft between the locking member and the installation disc.

As a preferable scheme of the present invention, the locking member includes a square frame and a circular frame, the square frame is sleeved on the curved arm, the circular frame is sleeved on the end of the rotating shaft, the curved arm is provided with an adjusting hole, and the locking member is fixedly connected with the curved arm through a locking bolt.

As a preferable scheme of the invention, the first crushing device comprises an L-shaped connecting plate, the L-shaped connecting plate is in threaded connection with a metal frame at the front end of the bottom plate through a bolt, a first blade group is arranged on the upper surface of the L-shaped connecting plate, the right end of the first blade group is in a sawtooth shape, a chute is fixedly arranged on the right side of the upper surface of the L-shaped connecting plate through a bolt, the right side of the first blade group is in sliding connection with the chute through a sliding device, a second blade group is fixedly arranged on the lower surface of the L-shaped connecting plate through a bolt, a groove is formed in the blade head of the second blade group, a fixing groove is fixedly arranged on the bottom plate through a bolt, the end of the fixing groove is fixedly connected with the upper surface of the second blade group, an accommodating cavity is formed between the fixing groove and the groove, and the first blade group slides in the accommodating cavity.

As a preferred scheme of the invention, the sliding device comprises a gear and a motor, the motor is fixed at the right end of the lower surface of the L-shaped connecting plate through a bolt, the output end of the motor penetrates through the L-shaped connecting plate, one end of the penetrating end is rotatably connected with the gear, and the gear is in meshed connection with the right end of the first blade group.

As a preferred scheme of the invention, the second crushing device comprises a first rotating roller and a second rotating roller, wherein first rotating blocks are arranged on the first rotating roller at equal intervals, a cutting cylinder is sleeved outside the first rotating roller, first cutters are welded on the surface of the cutting cylinder, strip-shaped grooves are formed in the cutting cylinder between every two adjacent first cutters, two guide shafts are connected in the cutting cylinder along the length direction, two groups of guide shafts are arranged on the two sides of the first rotating roller respectively, second cutters are arranged on the two guide shafts, and cutting blades are arranged on the second rotating roller at equal intervals.

As a preferable scheme of the present invention, the second cutting knife includes a pair of connecting arms, tail ends of the pair of connecting arms are sleeved on a guide shaft close to the first rotating block, front ends of the pair of connecting arms are rotatably connected with a clamping knife through a rotating shaft, a middle portion of the pair of connecting arms is rotatably connected with a second rotating block through a rotating shaft, the second rotating block is rotatably connected with the first rotating block, a pair of ear plates is arranged in a middle portion of outer sides of the pair of connecting arms, a first spring is connected between the pair of ear plates and a lower end of the clamping knife, and a second spring is connected between the tail ends of the pair of connecting arms and the other guide shaft.

The invention has the beneficial effects that:

(1) the invention fixes the pickup device and the metal frame together through the arranged locking piece, and the locking piece is fixed in the adjusting holes at different positions on the curved arm so as to change the distance between the pickup device and the metal frame and adapt to the lengths of different stalks.

(2) The stalk crushing device comprises a first crushing device, a second crushing device, a first cutting knife, a clamping knife, a cutting groove, a second cutting knife and a cutting groove, wherein the first crushing device is arranged at the upper part of the second crushing device, the second crushing device is arranged at the lower part of the second crushing device, the first cutting knife is matched with the clamping knife of the second cutting knife, the clamping knife extends out of the strip-shaped groove, the stalk is clamped, the rotary cutting blade is used for crushing and cutting, the material passing through the position can be cut off completely, the cutting groove is arranged right below the second crushing device, the working efficiency of the second crushing device can be improved, the working efficiency of equipment operation is improved, and the material is crushed, so that the subsequent compaction bundling process can be implemented smoothly.

Drawings

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

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

FIG. 3 is a schematic view of the structure of FIG. 2A according to the present invention;

FIG. 4 is a schematic view of a link structure according to the present invention;

FIG. 5 is a schematic view of a first blade set according to the present invention;

FIG. 6 is a schematic view of the sliding device of the present invention;

fig. 7 is a side view schematically illustrating the second crushing apparatus according to the present invention.

In the figure: 1. a metal frame; 11. a side plate; 12. a base plate; 121. cutting a groove; 13. a curved arm; 131. an adjustment hole; 2. a pickup device; 21. a rotating frame; 211. a turntable; 212. hole turning; 213. a connecting pipe; 214. a connecting beam; 22. a rotating shaft; 23. pulling a rod; 24. nail pulling; 25. installing a disc; 251. a circular slide rail; 252. a locking hole; 26. a connecting rod; 27. a locking lever; 3. a first crushing device; 31. an L-shaped connecting plate; 32. a first blade set; 33. a chute; 34. a sliding device; 341. a gear; 342. a motor; 35. a second blade set; 351. a groove; 36. fixing grooves; 4. a second crushing device; 41. a first rotating roller; 411. a first rotating block; 42. a second rotating roller; 421. cutting the slices; 43. cutting the cylinder; 431. a first cutter; 432. a strip-shaped groove; 433. a guide shaft; 44. a second cutter; 441. a connecting arm; 442. clamping the knife; 443. a second turning block; 444. an ear plate; 445. a first spring; 446. a second spring; 5. a locking member; 51. a square frame; 52. a circular frame.

Detailed Description

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", etc. indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, which are merely for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.

Examples

Referring to fig. 1-7, a material crushing cutter for an agricultural baler includes:

the metal frame 1, a pair of side plates 11 and a bottom plate 12 and a pair of curved arms 13 are welded in the metal frame 1, and a cutting groove 121 is formed in the upper surface of the bottom plate 12;

furthermore, the arranged metal frame 1 is a frame of the whole device, has certain strong hardness and can protect the device, and the upper surface of the bottom plate 12 is provided with a cutting groove 121 matched with the first cutter 431 in the second crushing device 4;

the picking device 2 is formed at the front end of the metal frame 1, is rotatably connected with the metal frame 1 through a pair of curved arms 13, and comprises a pair of rotating frames 21, a rotating shaft 22 and a pull rod 23;

Furthermore, the arranged pick-up device 2 plays a role in guiding the stalks and supporting and cutting, so that the situation that the cut stalks are blocked on the first crushing device 3 is prevented;

the first crushing device 3 is formed on the metal frame 1 at the front end of the bottom plate 12 and is positioned below the picking device 2;

further, the arranged first crushing device 3 is used for roughly cutting the stalks;

a second crushing device 4 formed between the pair of side plates 11;

further, a second crushing device 4 is arranged to perform fine cutting of the stalks.

Specifically, each rotating frame 21 includes a turntable 211, a rotating hole 212 is formed in the center of the turntable 211, five connecting pipes 213 are arranged in the circumferential equidistant array of the turntable 211, and a connecting beam 214 is fixedly connected between every two connecting pipes 213.

In a further embodiment: the cross section of the connecting beam 214 is L-shaped, so that the corresponding end part of the pulling rod 23 cannot be wound by the straws, the working efficiency is improved, and the connecting part of the pulling rod 23 and the corresponding connecting pipe 213 is required to fall into the corner formed by the connecting beam 214.

It is specific, it is a pair of coaxial axis of rotation 22 that has cup jointed between the carousel 211, the both ends of dead lever 23 cup joint fixedly with the connecting pipe 213 tip of both sides respectively, equidistant welding has the nail 24 of pulling out on the dead lever 23, pickup assembly 2 is still including being located the left side pivoted frame 21's the outside, and the middle part has circular slide rail 251 and locking hole 252's mounting disc 25, one end fixed connection in corresponding dead lever 23 tip and the other end rotate connect in mounting disc 25's connecting rod 26, the carousel 211 and the mounting disc 25 of both sides are run through out at the both ends of axis of rotation 22, and one that runs through out serves coaxial cover and be equipped with retaining member 5, are located coaxial coupling has locking lever 27 on the axis of rotation 22 between retaining member 5 and the mounting disc 25.

In a further embodiment: the locking holes 252 arranged on the mounting disc 25 are distributed along the axial direction of the mounting disc 25, and three locking holes are arranged, one end of each locking rod 27 is connected to the corresponding locking hole 252, and the locking rods 27 are connected with different locking holes 252, so that the mounting disc 25 rotates by a corresponding amplitude, the rotary disc 211 can generate radial deviation, the pull rod 23 is rotated through the connecting rod 26, and the angle formed between the length direction of the pull nail 24 when the pull nail rotates to the lowest point and the horizontal plane is adjusted.

Specifically, retaining member 5 includes square frame 51 and circular frame 52, square frame 51 cup joints on curved arm 13, circular frame 52 cup joints at axis of rotation 22 tip, and opens on the curved arm 13 and has adjusted the hole 131, retaining member 5 passes through locking bolt and curved arm 13 fixed connection.

In a further embodiment: the picking device 2 and the metal frame 1 are fixed together through the arranged locking piece 5, and the locking piece 5 is fixed in the adjusting holes 131 at different positions on the curved arm 13, so that the distance between the picking device 2 and the metal frame 1 is changed, and the picking device is suitable for the lengths of different stalks.

Specifically, the first crushing device 3 comprises an L-shaped connecting plate 31, the L-shaped connecting plate 31 is in threaded connection with the metal frame 1 at the front end of the bottom plate 12 through bolts, the upper surface of the L-shaped connecting plate 31 is provided with a first blade group 32, the right end of the first blade group 32 is in a sawtooth shape, the right side of the upper surface of the L-shaped connecting plate 31 is fixedly provided with a sliding chute 33 through a bolt, the right side of the first blade group 32 is connected with the sliding chute 33 in a sliding way through a sliding device 34, the lower surface of the L-shaped connecting plate 31 is fixedly provided with a second blade set 35 through bolts, a groove 351 is formed at the cutter head of the second blade set 35, a fixing groove 36 is fixedly installed on the bottom plate 12 through bolts, the end of the fixing groove 36 is fixedly connected with the upper surface of the second blade group 35, and a receiving cavity is formed between the fixing groove 36 and the groove 351, and the first blade group 32 is formed to slide in the receiving cavity.

In a further embodiment: when the first crushing device 3 moves, shearing force is generated through an included angle formed between the first blade group 32 and the second blade group 35 to cut crops, because the first blade group 32 and the second blade group 35 are long, a fixing groove 36 is fixedly installed on the bottom plate 12 through bolts, the end of the fixing groove 36 is fixedly connected with the upper surface of the second blade group 35, an accommodating cavity is formed between the fixing groove 36 and the groove 351, and the first blade group 32 is limited and fixed.

Specifically, the sliding device 34 includes a gear 341 and a motor 342, the motor 342 is fixed at the right end of the lower surface of the L-shaped connecting plate 31 through a bolt, an output end of the motor 342 penetrates through the L-shaped connecting plate 31, one end of the penetrating end is rotatably connected with the gear 341, and the gear 341 is meshed with the right end of the first blade group 32.

In a further embodiment: by starting the motor 342, the output end of the motor 342 drives the gear 341 to rotate, and the gear 341 is meshed with the right end of the first blade group 32, so that the first blade group 32 makes linear motion.

Specifically, second breaker 4 includes that first commentaries on classics roller 41 and second change roller 42, the equidistance is provided with first turning block 411 on the first commentaries on classics roller 41, first commentaries on classics roller 41 has cup jointed cutting barrel 43 outward, cutting barrel 43's the welding has first cutter 431 on the surface, is located adjacently it has strip groove 432 to open on the cutting barrel 43 between the first cutter 431, be connected with two guiding axles 433, two along length direction in the cutting barrel 43 guiding axle 433 is equipped with two sets of both sides that are located first commentaries on classics roller 41 respectively, two be provided with second cutter 44 on the guiding axle 433, the equidistance is provided with cutting piece 421 on the second changes roller 42.

In a further embodiment: the both ends of the first roller 41 of setting and the second roller 42 of changeing rotate with a pair of curb plate 11 inner wall and be connected, drive rotatoryly through motor 342, when the stem stalk gets into on the bottom plate 12, press from both sides tight sword 442 with the second cutter 44 that stretches out from the bar groove 432 through the first cutter 431 that sets up and cooperate, press from both sides the stem stalk tightly, carry out broken cutting through rotatory cutting piece 421.

Specifically, second cutter 44 includes a pair of linking arm 441, and is a pair of the tail end cover of linking arm 441 is established on the guide axle 433 that is close to first turning block 411, and is a pair of the front end of linking arm 441 is rotated through the pivot and is connected with clamping knife 442, and is a pair of the middle part of linking arm 441 is rotated through the pivot and is connected with second turning block 443, second turning block 443 rotates with first turning block 411 and is connected, and is a pair of linking arm 441 outside middle part is provided with a pair of otic placodes 444, and is a pair of otic placode 444 is connected with first spring 445 with clamping knife 442 lower extreme, it is a pair of the tail end of linking arm 441 with another be connected with second spring 446 between the guide axle 433.

In a further embodiment: the first spring 445 through setting plays taut effect to the clamping sword 442, when the stem falls into the cutting cylinder 43, fixes the stem through the contained angle that forms between clamping sword 442 and the first cutting knife 431, has improved the broken efficiency of stem.

The working principle and the using process are as follows:

when the device is used, the height of the pickup device 2 and the ground is adjusted, the mounting disc 25 is rotated by a corresponding amplitude through the connection of the locking rod 27 and different locking holes 252, so that the rotary disc 211 can generate radial offset, the pulling rod 23 is further rotated through the connecting rod 26, the angle formed between the length direction of the pulling nail 24 when the pulling nail is rotated to the lowest point and the horizontal plane is adjusted, the pulling rod 23 is rotated, the rotating pulling rod 23 and the pulling nail 24 are matched to enable the straws of crops to be collected, most of the straws of the crops are located in the device, along with the movement of the device, the output end of the motor 342 drives the gear 341 to rotate through starting the motor 342, the gear 341 is meshed with the right end of the first blade group 32, so that the first blade group 32 makes linear motion, shearing force is generated through the included angle formed between the first blade group 32 and the second blade group 35, and the straws of the crops can be cut thoroughly, the stalks of the crops move on the bottom plate 12 to the second crushing device 4, and are clamped by the cooperation of the arranged first cutters 431 and the clamping cutters 442 of the second cutters 44 extending from the strip-shaped grooves 432, and are crushed and cut by the rotating cutting blades 421.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims

1. The utility model provides a broken cutter of material for agricultural bundling machine which characterized in that includes:

the cutting device comprises a metal frame (1), wherein a pair of side plates (11), a bottom plate (12) and a pair of curved arms (13) are welded in the metal frame (1), and a cutting groove (121) is formed in the upper surface of the bottom plate (12);

the picking device (2) is formed at the front end of the metal frame (1), is rotatably connected with the metal frame (1) through a pair of curved arms (13), and comprises a pair of rotating frames (21), a rotating shaft (22) and a pulling rod (23);

the first crushing device (3) is formed on the metal frame (1) at the front end of the bottom plate (12) and is positioned below the picking device (2);

The second crushing device (4) is formed between the side plates (11) in a pair, the second crushing device (4) comprises a first rotating roller (41) and a second rotating roller (42), first rotating blocks (411) are equidistantly arranged on the first rotating roller (41), a cutting barrel (43) is sleeved outside the first rotating roller (41), first cutters (431) are welded on the surface of the cutting barrel (43), strip-shaped grooves (432) are formed in the cutting barrel (43) between the adjacent first cutters (431), two guide shafts (433) are connected in the cutting barrel (43) along the length direction, the two guide shafts (433) are provided with two groups of two sides respectively located on the first rotating roller (41), the two guide shafts (433) are provided with second cutters (44), cutting pieces (421) are equidistantly arranged on the second rotating roller (42), and the second cutters (44) comprise a pair of connecting arms (441), it is a pair of the tail end cover of linking arm (441) is established on guide axle (433) near first turning block (411), and is a pair of the front end of linking arm (441) is rotated through the pivot and is connected with clamping knife (442), and is a pair of the middle part of linking arm (441) is rotated through the pivot and is connected with second turning block (443), second turning block (443) is rotated with first turning block (411) and is connected, and is a pair of linking arm (441) outside middle part is provided with a pair of otic placode (444), and is a pair of otic placode (444) and clamping knife (442) lower extreme are connected with first spring (445), it is a pair of the tail end of linking arm (441) and another be connected with second spring (446) between guide axle (433).

2. The material crushing cutter for the agricultural baler of claim 1, wherein: each rotating frame (21) includes carousel (211), carousel (211) center department opens has changeing hole (212), carousel (211) have five connecting pipes (213) along the equidistant array of circumference, two liang fixedly connected with tie-beam (214) between connecting pipe (213).

3. The material crushing cutter for the agricultural baler of claim 2, wherein: a rotating shaft (22) is coaxially sleeved between the pair of turntables (211), two ends of the pulling rod (23) are respectively sleeved and fixed with the end parts of the connecting pipes (213) at two sides, the pulling rods (23) are equidistantly welded with pulling nails (24), the picking device (2) also comprises a rotating frame (21) positioned at the left side, a mounting disc (25) with a circular slide rail (251) and a locking hole (252) at the middle part, a connecting rod (26) with one end fixedly connected with the end part of the corresponding pulling rod (23) and the other end rotatably connected with the mounting disc (25), two ends of the rotating shaft (22) penetrate through the rotary disc (211) and the mounting disc (25) at two sides, and the coaxial cover that runs through out is equipped with retaining member (5), is located coaxial coupling has locking lever (27) on axis of rotation (22) between retaining member (5) and mounting disc (25).

4. The material crushing cutter for the agricultural baler according to claim 3, wherein: retaining member (5) are including square frame (51) and circular frame (52), square frame (51) cup joint on curved shape arm (13), circular frame (52) cup joint at axis of rotation (22) tip, and it has regulation hole (131) to open on curved shape arm (13), retaining member (5) are through locking bolt and curved shape arm (13) fixed connection.

5. The material crushing cutter for the agricultural baler of claim 1, wherein: the first crushing device (3) comprises an L-shaped connecting plate (31), the L-shaped connecting plate (31) is in threaded connection with a metal frame (1) at the front end of a bottom plate (12) through bolts, a first blade group (32) is arranged on the upper surface of the L-shaped connecting plate (31), the right end of the first blade group (32) is in a sawtooth shape, a sliding groove (33) is fixedly installed on the right side of the upper surface of the L-shaped connecting plate (31) through bolts, the right side of the first blade group (32) is in sliding connection with the sliding groove (33) through a sliding device (34), a second blade group (35) is fixedly installed on the lower surface of the L-shaped connecting plate (31) through bolts, a groove (351) is formed in the position of a blade of the second blade group (35), a fixing groove (36) is fixedly installed on the bottom plate (12) through bolts, and the end portion of the fixing groove (36) is fixedly connected with the upper surface of the second blade group (35), and a containing cavity is formed between the fixing groove (36) and the groove (351), and the first blade group (32) is formed in a sliding mode in the containing cavity.

6. The material crushing cutter for the agricultural baler according to claim 5, wherein: the sliding device (34) comprises a gear (341) and a motor (342), the motor (342) is fixed at the right end of the lower surface of the L-shaped connecting plate (31) through a bolt, the output end of the motor (342) penetrates through the L-shaped connecting plate (31), one penetrating end of the output end of the motor is rotatably connected with the gear (341), and the gear (341) is meshed with the right end of the first blade group (32).