Chrysanthemum harvesting machine

Abstract

The invention discloses a chrysanthemum harvester, comprising a frame, a walking mechanism is respectively installed on both sides of the frame, a gearbox is installed on the top surface of the frame, a driving mechanism is connected to the side of the gearbox, a harvesting mechanism is arranged below the gearbox, and the harvesting mechanism comprises a rotating shaft, the output shaft of the gearbox is vertically downward and passes through the frame to be connected to the rotating shaft, and the rotating shaft is sequentially installed with flower-dividing comb teeth and cutting blades distributed along its circumferential direction from top to bottom, the flower-dividing comb teeth and the cutting blades are arranged in an interlaced manner, and a gap is left between the flower-dividing comb teeth and the cutting blades in the vertical direction, the axial side of the cutting blade is a blade, a horizontal straw-supporting partition is arranged in the gap, the horizontal straw-supporting partition is located at the front side of the rotating shaft, and a U-shaped groove with an opening facing forward is spaced apart on the horizontal straw-supporting partition along its horizontal direction. The invention can keep the blade perpendicular to the stalk direction to cut the chrysanthemum, effectively reduce the chrysanthemum harvesting damage rate, improve the harvesting efficiency, and save labor costs.

Description

Technical Field

[0001] The invention belongs to the technical field of chrysanthemum picking and collecting, and particularly relates to a chrysanthemum harvester. Background Art

[0002] Chrysanthemum picking is a complex operation with strong seasonality. Currently, most of the pyrethrum picking in my country is done manually, which is inefficient and labor-intensive. If there are not enough people to pick the chrysanthemums in time, it is easy to cause economic losses. Existing harvesting machines separate the chrysanthemums from the stems by applying tension to the connection between the chrysanthemums and the stems, which is easy to cause damage to the chrysanthemums, and the harvested chrysanthemums contain stems of varying lengths. There is an urgent need for a new type of chrysanthemum harvester in this field to improve the harvesting efficiency, reduce the chrysanthemum damage rate, save labor costs, and improve the economic benefits of flower farmers. Summary of the invention

[0003] In order to solve the above problems, the present invention provides a chrysanthemum harvester, which is mainly used for picking single pyrethrum plants, and can also be used for picking other flowers. It is not easy to break the flowers, can replace manual picking, and does not require manual picking of flowers. It has the characteristics of high work efficiency, low cost, reduced manpower, flexibility, and easy operation.

[0004] The object of the present invention is achieved in the following manner:

[0005] A chrysanthemum harvester comprises a frame 8, walking mechanisms 1 are respectively installed on both sides of the frame 8, a gearbox 3 is installed on the top surface of the frame 8, a driving mechanism 2 is connected to the side of the gearbox 3, a harvesting mechanism 6 is arranged below the gearbox 3, the harvesting mechanism 6 comprises a rotating shaft 601, the output shaft of the gearbox 3 is vertically downward and passes through the frame 8 to be connected to the rotating shaft 601, the rotating shaft 601 is sequentially installed with flower-sorting comb teeth 604 and cutting blades 605 distributed along its circumferential direction from top to bottom, the flower-sorting comb teeth 604 and the cutting blades 605 are arranged in an alternating manner, a gap is left between the flower-sorting comb teeth 604 and the cutting blades 605 in the vertical direction, the axial side of the cutting blade 605 is a blade, a horizontal grain-supporting partition 701 is arranged in the gap, the horizontal grain-supporting partition 701 is located on the front side of the rotating shaft 601, and the horizontal grain-supporting partition 701 is provided with U-shaped grooves with openings facing forward at intervals along its horizontal direction.

[0006] A collecting box 4 is installed on the top surface of the frame 8, and a negative pressure exhaust fan is installed on the collecting box 4. A collecting mechanism 5 is arranged below one side of the harvesting mechanism 6, and the collecting mechanism 5 is installed on the frame 8. The top surface of the collecting mechanism 5 is open, and the side surface of the collecting mechanism 5 is connected to the collecting box 4.

[0007] The collecting mechanism 5 comprises a collecting box 501 with an opening on the top surface, a side opening of the collecting box 501 , a transmission cylinder 503 connected to the side opening, a connecting pipe 504 connected to the top of the transmission cylinder 503 , and the connecting pipe 504 connected to the collecting box 4 .

[0008] An inclined grain-supporting partition 702 inclined forward and downward is arranged below the front end of the horizontal grain-supporting partition 701 , and the structure of the inclined grain-supporting partition 702 is the same as that of the horizontal grain-supporting partition 701 .

[0009] The two side surfaces of the horizontal grain-supporting partition 701 and the inclined grain-supporting partition 702 are respectively connected with an adaptive horizontal adjustment mechanism, which includes a support rod I 704 and a support rod II 705 arranged in sequence along the width direction thereof, and springs 703 are respectively sleeved on the support rod I 704 and the support rod II 705, and the ends thereof are both extended along the springs 703, and the extended ends thereof are respectively passed through the frame 8, and nuts are screwed on the outer ends thereof, and a distance is left between the nuts and the outer side surface of the frame 8 for adaptive horizontal adjustment.

[0010] The frame 8 is provided with an oblique connection hole 802 for adjusting the inclination of the oblique supporting grain partition 702. The oblique connection hole 802 is an arc-shaped groove as a whole. The support rod II 705 on the oblique supporting grain partition 702 passes through the oblique connection hole 802 and a nut is screwed on the outer end thereof.

[0011] The bottom surface of the collection box 501 is a mesh plate 502 .

[0012] The walking mechanism 1 includes a vertical support rod 101, a mounting frame 102 is installed at the bottom end of the vertical support rod 101, and a wheel 103 is installed on the mounting frame 102. The vertical support rod 101 is provided with adjustment holes I 107 at intervals along its axial direction. The vertical support rod 101 is provided with a sleeve 105 on the outer surface, and a fixing rod 104 is connected to the inner side of the sleeve 105. A fixing hole 106 is provided on the outer side of the sleeve 105. Fixing screws are inserted into the fixing hole 106 and the adjusting hole I 107 corresponding to the position thereof, and an adjustment hole II 108 is provided on the fixing rod 104; the sides of the frame 8 are connected to horizontal adjustment rods 804, the adjustment rod 804 is a hollow structure and its outer end is open, and the adjustment rod 804 is provided with adjustment holes III 805 at intervals along its axial direction, the fixing rod 104 is inserted into the adjusting rod 804, and fastening bolts are inserted into the adjustment hole III 805 and the adjustment hole II 108.

[0013] The frame 8 includes two side panels 806, and a collecting frame 808 is installed inside the side panels 806. The top and bottom surfaces of the collecting frame 808 are both open, and the open top surface of the collecting mechanism 5 extends from the bottom surface of the collecting frame 808 to the inside thereof.

[0014] The flower-picking comb teeth 604 and the cutting blade 605 are respectively fixed on the rotating shaft 601 by bolts.

[0015] Compared with the prior art, the present invention changes the traditional manual picking method. The chrysanthemums are first dispersed by using a supporting partition and the chrysanthemums can be kept in a vertical state to ensure better cutting efficiency. The flower stems are then cut off by the shear force of a rotatable cutting blade to reduce the damage rate of the chrysanthemums. The flowers are then plucked and collected by using the flower-picking comb teeth, thereby improving the harvesting efficiency, reducing the damage rate of the chrysanthemums, saving labor costs, and improving the economic benefits of flower farmers. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention.

[0017] Figure 2 yes Figure 1 Schematic diagram of the structure of the walking mechanism.

[0018] Figure 3 It is a structural diagram of the harvesting mechanism.

[0019] Figure 4 It is a structural diagram of the collection mechanism.

[0020] Figure 5 It is a structural diagram of the Fuhe mechanism.

[0021] Figure 6 It is a schematic diagram of the structure of the rack.

[0022] Among them, 1. walking mechanism, 2. driving mechanism, 3. gearbox, 4. collecting box, 5. collecting mechanism, 6. harvesting mechanism, 7. rice-supporting mechanism, 8. frame;

[0023] 101, vertical support rod, 102, mounting frame, 103, wheel, 104, fixing rod, 105, sleeve, 106, fixing hole, 107, adjustment hole I, 108, adjustment hole II; 201, driving wheel, 202, driven wheel; 501, collecting box, 502, mesh plate, 503, transmission cylinder, 504, connecting pipe; 601, transfer shaft, 602, upper support rod, 603, lower support rod, 604, flower comb teeth, 605 , cutting blade, 606, bolt; 701, horizontal supporting grain partition, 702, inclined supporting grain partition, 703, spring, 704, support rod I, 705, support rod II; 801, horizontal connecting hole, 802, inclined connecting hole, 803, support rod, 804, adjusting rod, 805, adjusting hole III, 806, side plate, 807, side fixing hole, 808, collecting frame, 809, fixing frame, 810, supporting frame, 811, socket hole. DETAILED DESCRIPTION

[0024] In the present invention, the forward direction of the chrysanthemum harvester is regarded as the front direction, and the reverse direction is regarded as the rear direction.

[0025] like Figure 1-6 As shown, a chrysanthemum harvester comprises a frame 8, a walking mechanism 1 is respectively installed on both sides of the frame 8, a gearbox 3 is installed on the top surface of the frame 8, a driving mechanism 2 is connected to the side of the gearbox 3, a harvesting mechanism 6 is arranged below the gearbox 3, and the harvesting mechanism 6 comprises a rotating shaft 601, the output shaft of the gearbox 3 is vertically downward and passes through the frame 8 to be connected to the rotating shaft 601, and the rotating shaft 601 is sequentially installed with flower comb teeth 604 and cutting blades 605 distributed along its circumferential direction from top to bottom, as shown in FIG. Figure 3 As shown, the flower-dividing comb teeth 604 and the cutting blades 605 are arranged in a staggered manner, so as to facilitate cutting off the flower stems before collecting the flowers. A gap is left between the flower-dividing comb teeth 604 and the cutting blades 605 in the vertical direction. The axial side of the cutting blades 605 is a blade. A horizontal grain-supporting partition 701 is arranged in the gap. The horizontal grain-supporting partition 701 is located at the front side of the rotating shaft 601. The horizontal grain-supporting partition 701 is provided with U-shaped grooves with openings facing forward at intervals along its horizontal direction. According to the density of chrysanthemum planting in the field, the flower-dividing comb teeth 604 and the cutting blades 605 can be arranged in different numbers in the circumferential direction, so as to increase the number of chrysanthemums to be cut and improve the picking efficiency.

[0026] When the chrysanthemum harvester of the present invention is working, it is integrally suspended at the front end of the tractor, and the power of the driving mechanism 2 is provided by the pulley of the tractor. The tractor is a prior art and will not be described in detail here. The driving mechanism 2 is installed on the frame 8, and includes a driving wheel 201 and a driven wheel 202. The driving wheel 201 and the driven wheel 202 are connected with a conveyor belt. The central wheel shaft of the driving wheel 201 is driven by the pulley on the tractor, and the central wheel shaft of the driven wheel 202 is connected to the transmission shaft in the gearbox 3. The output shaft of the gearbox 3 drives the intermediate shaft 601 to rotate, and the intermediate shaft 601 drives the flower comb teeth 604 and the cutting blade 605 to rotate simultaneously.

[0027] In order to facilitate the collection of chrysanthemums, a collection box 4 is installed on the top surface of the frame 8, and a negative pressure exhaust fan (not shown in the figure) is installed on the collection box 4. The negative pressure exhaust fan has a battery for providing power. A collection mechanism 5 is arranged below one side of the harvesting mechanism 6. The collection mechanism 5 is installed on the frame 8. The top surface of the collection mechanism 5 is open, and the side of the collection mechanism 5 is connected to the collection box 4. The negative pressure exhaust fan generates negative pressure, which causes the chrysanthemums to be sucked from the collection mechanism 5 into the collection box 4 for collection.

[0028] Furthermore, if Figure 1 , Figure 4As shown, the collecting mechanism 5 includes a collecting box 501 with an opening on the top surface, a side opening of the collecting box 501, a transmission cylinder 503 connected to the side opening, a connecting pipe 504 connected to the top of the transmission cylinder 503, and the connecting pipe 504 is connected to the collecting box 4.

[0029] In order to facilitate the dispersion and combing of the chrysanthemum stalks to keep them in a vertical state to ensure better cutting efficiency, in one embodiment, an inclined grain-supporting partition 702 inclined forward and downward is provided below the front end of the horizontal grain-supporting partition 701, and the structure of the inclined grain-supporting partition 702 is the same as that of the horizontal grain-supporting partition 701. Of course, another embodiment can also be adopted, that is, the horizontal grain-supporting partition 701 is V-shaped as a whole, one side of which is horizontal, and the other side extends forward and downward, and V-shaped grooves with front end openings are arranged on it. The inclined grain-supporting partition 702 and the horizontal grain-supporting partition 701 together form the grain-supporting mechanism 7.

[0030] In order to facilitate the support mechanism 7 to adjust the horizontal position according to the chrysanthemum stalk, the two sides of the horizontal support partition 701 and the inclined support partition 702 are respectively connected with an adaptive horizontal adjustment mechanism, which includes support rods I 704 and support rods II 705 arranged in sequence along the width direction thereof. Figure 5 As shown, springs 703 are respectively sleeved on support rods I 704 and II 705, and the ends of the support rods are extended along the springs 703, and the extended ends are respectively passed along the frame 8, and nuts (not shown in the figure) are screwed on the extended ends, and a distance is left between the nuts and the outer side of the frame 8 for adaptive horizontal adjustment. The frame 8 is respectively provided with horizontal connection holes 801 for the support rods I 704 and II 705 on the horizontal grain-supporting partition 701 to pass through and fix, and the frame 8 is also provided with side fixing holes 807 for the support rods I 704 on the oblique grain-supporting partition 702 to pass through, and oblique connection holes 802 for the support rods II 705 on the oblique grain-supporting partition 702 to pass through as described below. The horizontal grain-supporting partition 701 adopts the design of adaptive horizontal adjustment mechanism, so that the flowers are easier to fall on the horizontal grain-supporting partition 701.

[0031] In the initial state, the springs 703 are in a natural state and the outer ends of the springs 703 are in contact with the inner side of the side plate 806 of the frame 8, that is, the sum of the natural axial lengths of the two springs 703 and the widths of the horizontal supporting grain partition 701 or the oblique supporting grain partition 702 is just equal to the distance between the inner side of the two side plates 806 on the frame 8, and at this time, there is a distance between the nut and the outer side of the frame 8. During operation, when the chrysanthemum causes the horizontal supporting grain partition 701 or the oblique supporting grain partition 702 to move horizontally, one side of the spring 703 is compressed, and when the horizontal supporting grain partition 701 or the oblique supporting grain partition 702 is no longer pressed by the chrysanthemum, the elastic restoring force of the spring 703 causes the horizontal supporting grain partition 701 or the oblique supporting grain partition 702 to return to the initial position.

[0032] Further, in order to facilitate the adjustment of the inclination of the inclined support partition 702, as Figure 1 , Figure 6 As shown, the frame 8 is provided with an oblique connection hole 802 for adjusting the inclination of the oblique supporting grain partition 702. The oblique connection hole 802 is an arc-shaped groove as a whole. The support rod II 705 on the oblique supporting grain partition 702 passes through the oblique connection hole 802, and the passing end is screwed with a nut. The oblique supporting grain partition 702 can be adjusted within a certain angle range to meet the height of different supporting points, and can adapt to the harvesting of chrysanthemums at different heights.

[0033] In order to facilitate the separation of flower scraps, broken branches and excess leaves, the bottom surface of the collection box 501 is a mesh plate 502.

[0034] In order to facilitate the adjustment of the vertical height and horizontal position of the harvesting mechanism and the frame of the present invention, the walking mechanism 1 includes a vertical support rod 101, a mounting frame 102 is installed at the bottom end of the vertical support rod 101, and a wheel 103 is installed on the mounting frame 102. The vertical support rod 101 is provided with adjustment holes I 107 along its axial intervals, and the outer surface of the vertical support rod 101 is provided with a sleeve 105, the inner side of the sleeve 105 is connected to a fixing rod 104, and the outer side of the sleeve 105 is provided with a fixing hole 106. The fixed hole 106 and the corresponding adjustment hole Ⅰ107 are provided with fixing screws, and the fixing rod 104 is provided with an adjustment hole Ⅱ108; the sides of the frame 8 are connected with horizontal adjustment rods 804, the adjustment rods 804 are hollow structures and their outer ends are open, and the adjustment rods 804 are provided with adjustment holes Ⅲ805 along their axial intervals, the fixing rod 104 is inserted into the adjustment rod 804, and the adjustment holes Ⅲ805 and the adjustment holes Ⅱ108 are provided with fastening bolts (not shown in the figure). It can adjust the working form of the whole machine of the present invention according to various terrains, ridge widths, and average heights of plants to better achieve the purpose of harvesting. Support rods 803 are respectively installed on both sides of the above-mentioned adjustment rod 804 for better support.

[0035] The horizontal position is adjusted by screwing the adjusting hole II 108 on the fixing rod 104 and the adjusting hole III 805 at different positions on the adjusting rod 804 accordingly; the height of the harvesting mechanism of the present invention is adjusted by screwing the adjusting sleeve 105 and the adjusting hole I 107 at different positions on the vertical support rod 101 accordingly.

[0036] In order to facilitate the chrysanthemum to accurately fall into the collecting mechanism 5, as shown in FIG. Figure 6As shown, the frame 8 includes two side panels 806, and a collection frame 808 is installed inside the side panels 806. The top and bottom surfaces of the collection frame 808 are both open, and the open top surface of the collection mechanism 5 extends from the bottom surface of the collection frame 808 to the inside thereof. The bottom surface area of ​​the collection mechanism 5 is larger than the cross-sectional area of ​​the collection frame 808. The frame 8 also includes a fixing frame 809, which is installed on the top of the two side panels 806, as shown in FIG. Figure 6 As shown, a support frame 810 is installed at the bottom of the fixed frame 809, and the above-mentioned gearbox 3, collection box 4, and negative pressure exhaust fan are all installed on the support frame 810. The side of the above-mentioned fixed frame 809 is also embedded with a socket hole 811 for the axle of the driven wheel of the above-mentioned driving mechanism 2 to pass through.

[0037] In order to facilitate installation and disassembly, the flower-sorting comb teeth 604 and the cutting blade 605 are respectively fixed to the rotating shaft 601 by bolts. Specifically, the rotating shaft 601 is fixed with an upper support rod 602 and a lower support rod 603 in sequence from top to bottom along its axial direction, and the upper support rod 602 and the lower support rod 603 are arranged at intervals along the circumferential direction, and the flower-sorting comb teeth 604 and the cutting blade 605 are respectively fixed to the upper support rod 602 and the lower support rod 603 by bolts 606, and the upper support rod 602 and the lower support rod 603 are respectively provided with holes for fixing.

[0038] When the chrysanthemum harvester of the present invention is working, the whole structure is suspended at the front end of the tractor, the power of the driving mechanism 2 is provided by the pulley of the tractor, and the built-in storage battery enables the negative pressure exhaust fan to work stably. At the same time, the driving mechanism 2 drives the harvesting mechanism 6 to rotate after the gearbox 3 is turned and changed. When the tractor drives the present invention forward, the inclined straw baffle 702 disperses and arranges the chrysanthemum stalks to keep them in a vertical state. As the tractor moves forward, when the dispersed chrysanthemum plants reach the front end of the horizontal straw baffle 701, they are just located at the tail of the U-shaped groove in the inclined straw baffle 702. The cutting blade 605 rotates to generate shear force to cut off the flowers, and the flowers naturally fall on the horizontal straw baffle 701.

[0039] As the process continues, the chrysanthemums are swept by the rotating flower-sorting comb teeth 604, and the sheared flowers are swept from the horizontal supporting partition 701 to the top of the collection box 501, and then naturally fall into the collection box 501. The negative pressure exhaust fan allows the flowers to be sucked from the collection box 501 through the bottom of the transmission cylinder 503 into the collection box 4, thus completing a cycle of picking and collecting operations and realizing the integration of picking and collecting.

[0040] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several changes and improvements can be made without departing from the overall concept of the present invention. These should also be regarded as the scope of protection of the present invention. These will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A chrysanthemum harvester, characterized in that: The machine comprises a frame (8), walking mechanisms (1) are respectively installed on both sides of the frame (8), a gearbox (3) is installed on the top surface of the frame (8), a driving mechanism (2) is connected to the side of the gearbox (3), a harvesting mechanism (6) is arranged below the gearbox (3), and the harvesting mechanism (6) comprises a central rotating shaft (601), an output shaft of the gearbox (3) is vertically downward and passes through the frame (8) and is connected to the central rotating shaft (601), and the central rotating shaft (601) is sequentially installed with respective shafts distributed along its circumferential direction from top to bottom. The flower-splitting comb teeth (604) and the cutting blades (605) are arranged in a staggered manner, a gap is left between the flower-splitting comb teeth (604) and the cutting blades (605) in the vertical direction, the axial side of the cutting blade (605) is a blade, a horizontal grain-supporting partition (701) is arranged in the gap, the horizontal grain-supporting partition (701) is located on the front side of the rotating shaft (601), and U-shaped grooves with openings facing forward are spaced apart along the horizontal direction thereof; A collecting box (4) is installed on the top surface of the frame (8), a negative pressure exhaust fan is installed on the collecting box (4), a collecting mechanism (5) is arranged below one side of the collecting mechanism (6), the collecting mechanism (5) is installed on the frame (8), the top surface of the collecting mechanism (5) is open, and the side surface of the collecting mechanism (5) is connected to the collecting box (4); An inclined straw baffle (702) inclined forward and downward is provided below the front end of the horizontal straw baffle (701); the structure of the inclined straw baffle (702) is the same as that of the horizontal straw baffle (701); The two sides of the horizontal supporting grain baffle (701) and the inclined supporting grain baffle (702) are respectively connected with an adaptive horizontal adjustment mechanism, and the adaptive horizontal adjustment mechanism comprises a support rod I (704) and a support rod II (705) arranged in sequence along the width direction thereof, and the support rod I (704) and the support rod II (705) are respectively sleeved with a spring (703) and the ends of the support rods are extended along the spring (703), and the extended ends are respectively extended along the frame (8), and the extended ends are externally screwed with nuts, and a distance is left between the nuts and the outer side surface of the frame (8) for adaptive horizontal adjustment; The frame (8) is provided with an oblique connection hole (802) for adjusting the inclination of the oblique supporting grain partition (702); the oblique connection hole (802) is an arc-shaped groove as a whole; the support rod II (705) on the oblique supporting grain partition (702) passes through the oblique connection hole (802) and a nut is screwed to the outer end of the passing end.

2. The chrysanthemum harvester according to claim 1, characterized in that: The collecting mechanism (5) comprises a collecting box body (501) with an opening on the top surface, a side opening of the collecting box body (501), a transmission cylinder (503) being connected to the side opening, a connecting pipe (504) being connected to the top end of the transmission cylinder (503), and the connecting pipe (504) being connected to the collecting box (4).

3. The chrysanthemum harvester according to claim 2, characterized in that: The bottom surface of the collection box (501) is a mesh plate (502).

4. The chrysanthemum harvester according to claim 1, characterized in that: The walking mechanism (1) comprises a vertical support rod (101), a mounting frame (102) is mounted at the bottom end of the vertical support rod (101), a wheel (103) is mounted on the mounting frame (102), the vertical support rod (101) is provided with adjustment holes I (107) at intervals along its axial direction, a sleeve (105) is disposed on the outer surface of the vertical support rod (101), a fixing rod (104) is connected to the inner side surface of the sleeve (105), a fixing hole (106) is formed on the outer side surface of the sleeve (105), and the fixing hole (106) and the fixing hole (106) are connected to the fixing hole (106). A fixing screw is inserted into a corresponding adjustment hole I (107), and an adjustment hole II (108) is provided on the fixing rod (104); a horizontal adjustment rod (804) is connected to the side of the frame (8), the adjustment rod (804) is a hollow structure with an open outer end, and adjustment holes III (805) are provided on the adjustment rod (804) along the axial direction thereof at intervals, the fixing rod (104) is inserted into the adjustment rod (804), and fastening bolts are inserted into the adjustment hole III (805) and the adjustment hole II (108).

5. The chrysanthemum harvester according to claim 1, characterized in that: The frame (8) comprises two side panels (806), a collecting frame (808) is mounted inside the side panels (806), the top and bottom surfaces of the collecting frame (808) are both open, and the open top surface of the collecting mechanism (5) extends from the bottom surface of the collecting frame (808) into the interior thereof.

6. The chrysanthemum harvester according to claim 1, characterized in that: The flower-picking comb teeth (604) and the cutting blade (605) are respectively fixed to the central rotating shaft (601) by means of bolts.

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