Hair ball removing machine for Chinese chestnuts

Abstract

The utility model discloses a Chinese chestnut hair ball removing machine which comprises a hair ball crushing device, a vibration separation device and an air blowing separation device, nails are arranged on rollers in the hair ball crushing device, and Chinese chestnut fruits and falling hair balls enter the vibration separation device through a fence; the vibrating separation device is provided with a vibrating screen, and Chinese chestnut fruits fall onto a screen tray through a screen mesh; the front end of the vibrating screen inclines downwards, and Chinese chestnut fruits and hair balls are conveyed to an opening of the vibrating screen through vibration; the blowing separation device is used for separating Chinese chestnuts and hair balls falling from the vibrating screen opening into Chinese chestnut fruits and hair balls through wind power, a fan is arranged below the vibrating screen, and an air outlet of the fan faces the inclined upper portion of the vibrating screen opening. The Chinese chestnut hair ball removing machine is compact in structure, small in occupied area, capable of rapidly removing hair balls of Chinese chestnuts on a large scale, easy to operate, low in labor intensity and high in working efficiency, and the defects that the Chinese chestnuts are easily punctured by the hair balls and the working efficiency is low when the hair balls are removed manually are overcome.

Description

Technical Field

[0001] The utility model relates to the field of fruit processing machinery, in particular to a chestnut pilling machine. Background Art

[0002] A mature chestnut begins life as a prickly green ball. Only after peeling the ball can the brown chestnut nut, typically containing 2-4 berries, be revealed. This prickly ball acts as a protective layer, protecting the berries from external damage. However, removing this prickly ball can be a hassle.

[0003] The removal of the chestnut bulb layer is usually done manually. During the process of peeling off the bulb shell, it is easy to be pricked by the thorns on the bulb. Manual peeling is labor-intensive and time-consuming, with high labor intensity and low efficiency. During the harvest season, some large chestnut farmers often lack labor and do not have time to remove the bulb in time, making it impossible to produce chestnut fruits in time. If the chestnuts are left for too long, they may even deteriorate inside the bulb, causing great economic losses to production. Utility Model Content

[0004] The purpose of the utility model is to provide a chestnut depilatory machine in response to the above situation. The chestnut depilatory machine has a compact structure, occupies a small area, can quickly depilate chestnuts in large quantities, and has the advantages of simple operation, low labor intensity and high work efficiency.

[0005] The technical solution for achieving the purpose of this utility model is:

[0006] A chestnut pilling machine, comprising

[0007] The ball crushing device is used to crush the ball layer on the surface of the chestnut fruit. The roller in the ball crushing device is provided with nails to crush the ball layer, so that the chestnut fruit and the ball are separated. The chestnut fruit and the detached ball enter the vibration separation device through the fence that serves as a separation.

[0008] A vibration separation device is used to separate chestnut fruits and hair balls. The vibration separation device is equipped with a vibrating screen. The chestnut fruits fall onto the screen plate through the screen of the vibrating screen, while the hair balls remain on the screen. The front end of the vibrating screen is tilted downward. The chestnut fruits and hair balls are transported to the vibrating screen opening at the front end of the vibrating screen by vibration.

[0009] The blowing separation device is used to separate the chestnut fruits and hair balls falling from the vibrating screen mouth by wind power. The fan in the blowing separation device is arranged below the vibrating screen, and the air outlet of the fan is directed obliquely upward from the vibrating screen mouth.

[0010] Furthermore, the hair ball crushing device includes

[0011] The roller is in the shape of a hollow cylinder, and the outer surface of the roller is provided with densely arranged nails, the nails are arranged in rows parallel to the roller axis of the roller, and the two adjacent rows of nails are gradually staggered and arranged;

[0012] The box assembly is used to cooperate with the roller to destroy the hairy layer on the surface of the chestnut fruit and separate the chestnuts with unbroken hairy layer from the chestnut fruits with the hairy layer removed and the broken hairy layer. The box assembly includes a box cover, a box base, a feed hopper and a fence. The feed hopper is arranged on the box cover; the fence is arranged in the box base and is used to pass the chestnut fruits with the hairy layer removed and the broken hairy layer. The box cover and the box base form a hollow processing space.

[0013] The roller is arranged in a processing space formed by a box cover and a box seat, and a roller shaft of the roller is connected to a motor.

[0014] Furthermore, the vibration separation device includes a vibrating screen, which includes a screen, a screen plate and a connecting rod driving mechanism, wherein the screen plate is arranged below the screen and the screen plate is connected to the screen;

[0015] The connecting rod drive mechanism includes a connecting rod seat, a first connecting rod and a second connecting rod; the connecting rod seat is rotatably connected to one end of the second connecting rod, the first connecting rod is a cam, the other end of the second connecting rod is rotatably connected to the protrusion of the cam, and the cam is connected to the motor; the connecting rod seat is connected to the rear side wall of the sieve plate; the left and right side walls of the sieve plate are connected to the supporting side plates through support bars;

[0016] The mesh size of the sieve is 30 mm.

[0017] Furthermore, the roller has a diameter of 300 mm and a length of 584 mm; the nailing diameter is 20 mm and a length of 67.5 mm; and the processing space has a diameter of 500 mm and a length of 600 mm.

[0018] Furthermore, the nail head is spherical, and the surface of the nail head is covered with a 2.5 mm thick soft rubber sleeve.

[0019] Furthermore, adjacent nails in the same row are spaced 70 mm apart; and adjacent rows of nails are gradually staggered by 30 mm.

[0020] Furthermore, the fence posts of the fence are made of threaded steel, each fence post has a diameter of 16 mm and a length of 578 mm; the distance between two adjacent fence posts is 30 mm.

[0021] Furthermore, the vibration frequency of the vibrating screen is 15 times / second.

[0022] Furthermore, the screen and the screen plate are tilted downwards at an angle of 5° to the horizontal plane.

[0023] Furthermore, an internal bracket is provided in the roller, and the internal bracket includes spokes and connecting strips. Each end surface inner wall of the roller is provided with 6 spokes, and the 6 spokes are radially and evenly arranged on the end surface inner wall of the roller, and the inner ends of the spokes are connected to the roller shaft; the spokes on the two inner end surfaces of the roller are arranged symmetrically; the connecting strips are arranged on the side inner wall of the roller, and the number of the connecting strips is 6; the outer ends of the spokes on the two inner end surfaces are connected by connecting strips.

[0024] During operation, chestnut balls enter the processing space through the feed hopper, and are first subjected to friction, squeezing and impact by rollers, nails and fences. The broken balls and chestnut fruits fall onto the screen through the fence below. The movement of the screen is controlled by a connecting rod mechanism. The screen has a certain inclination, and the vibration will allow the balls with lighter mass and larger surface area to remain on the screen, while the chestnut fruits and smaller balls will fall onto the screen plate through the screen holes. When the balls and chestnut fruits vibrate to the vibrating screen mouth of the vibrating screen, due to the action of the wind force of the fan, the lighter chestnut balls and ball debris will be blown out, while the chestnut fruits, due to their larger mass, will not be blown away by the wind force generated by the fan, and will fall onto the collection device below, thus completing the de-balling process of the chestnut fruit.

[0025] This chestnut pilling machine has a compact structure and occupies a small area. It cleverly uses a fence to separate the fallen pills and fruits, then uses a sieve to separate the fruits and pill debris, and finally uses wind power to separate the pills, pill debris and fruits. It can quickly and in large quantities remove the pills from chestnuts, and has the advantages of simple operation, low labor intensity and high work efficiency. It avoids the shortcomings of manual pilling that are easily pricked by the pills, low work efficiency, and the deterioration of chestnuts due to long-term storage without time to remove the pills. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural diagram of a chestnut pilling machine according to an embodiment;

[0027] Figure 2 It is a structural diagram of a chestnut pilling machine according to an embodiment;

[0028] Figure 3 A schematic structural diagram of a roller in an embodiment;

[0029] Figure 4 A schematic structural diagram of a vibrating screen according to an embodiment;

[0030] Figure 5 Schematic diagram of the structure of the connecting rod driving mechanism of the embodiment;

[0031] Figure 6 Schematic diagram of the structure of the box assembly of the embodiment.

[0032] In the figure, 1. Hair ball crushing device; 1-1. Roller; 1-2. Nail; 1-3. Fence; 1-4. Roller; 1-5. Box cover; 1-6. Box base; 1-7. Feed hopper; 1-8. Motor; 1-9. Nail head; 1-10. Spoke; 1-11. Connecting strip;

[0033] 2. Vibration separation device; 2-1. Screen; 2-2. Sieve plate; 2-3. Vibrating screen opening; 2-4. Connecting rod seat; 2-5. First connecting rod; 2-6. Second connecting rod; 2-7. Support bar; 2-8. Support side plate; 2-9. Sieve hole; 2-10. Stopper;

[0034] 3. Blowing separation device; 3-1. Fan;

[0035] 4. Frame; 5. Waste baffle; 6. Collection device. DETAILED DESCRIPTION

[0036] The following further illustrates the present invention in conjunction with the embodiments and accompanying drawings. It is apparent that the embodiments described are only a portion of the present invention, not all of the embodiments. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention. Example

[0037] like Figures 1-6 As shown, a chestnut hair removal machine includes

[0038] The hair ball crushing device 1 is used to crush the hair ball layer on the surface of the chestnut fruit. The roller 1-1 in the hair ball crushing device 1 is provided with nails 1-2 to crush the hair ball layer, so that the chestnut fruit and the hair ball are separated. The chestnut fruit and the detached hair ball pass through the fence 1-3 that serves as a separation and enter the vibration separation device;

[0039] A vibration separation device 2 is used to separate chestnut fruits and hair balls. The vibration separation device 2 is equipped with a vibrating screen. The chestnut fruits pass through the screen 2-1 of the vibrating screen and fall onto the screen plate 2-2, while the hair balls remain on the screen 2-1. The front end of the vibrating screen is tilted downward, and the chestnut fruits and hair balls are transported to the vibrating screen opening 2-3 at the front end of the vibrating screen by vibration.

[0040] The blowing separation device 3 is used to separate the chestnut fruits and hair balls falling from the vibrating screen mouth 2-3 by wind power. The fan 3-1 in the blowing separation device 3 is arranged below the vibrating screen, and the air outlet of the fan 3-1 is facing obliquely above the vibrating screen mouth.

[0041] like Figure 3 As shown, the hair ball crushing device 1 includes

[0042] The roller 1-1 is in the shape of a hollow cylinder. The outer surface of the roller 1-1 is provided with densely arranged nails 1-2. The nails 1-2 are arranged in rows and parallel to the roller shaft 1-4 of the roller 1-1. The nails 1-2 in two adjacent rows are staggered and arranged in a staggered manner.

[0043] like Figure 6 As shown, the box assembly is used to cooperate with the roller 1-1 to destroy the hairy layer on the surface of the chestnut fruit and separate the chestnuts with unbroken hairy layer from the chestnut fruits with removed hairy layer and the broken hairy layer; the box assembly includes a box cover 1-5, a box seat 1-6, a feed hopper 1-7 and a fence 1-3, the feed hopper 1-7 is arranged on the box cover 1-5; the fence 1-3 is arranged in the box seat 1-6, and the fence 1-3 is used to pass the chestnut fruits with removed hairy layer and the broken hairy layer; the box cover 1-5 and the box seat 1-6 form a hollow processing space;

[0044] The roller 1-1 is arranged in a processing space formed by a box cover 1-5 and a box seat 1-6, and the roller shaft 1-4 of the roller 1-1 is connected to the motor 1-8.

[0045] Furthermore, the roller 1-1 has a diameter of 300 mm and a length of 584 mm; the nailing device 1-2 has a diameter of 20 mm and a length of 67.5 mm; and the processing space has a diameter of 500 mm and a length of 600 mm.

[0046] Furthermore, the nail head 1-9 of the nailing tool 1-2 is spherical, and the surface of the nail head 1-9 is covered with a 2.5 mm thick soft rubber sleeve.

[0047] Furthermore, adjacent nails 1-2 in the same row are spaced 70mm apart, and nails 1-2 in two adjacent rows are offset by 30mm. The meticulously planned layout of nails 1-2 promotes full rolling of the chestnuts on roller 1-1, extending the contact time for dehairing and improving both efficiency and completeness of dehairing.

[0048] Furthermore, the fence posts of the fences 1-3 are made of threaded steel bars, each fence post has a diameter of 16 mm and a length of 578 mm; and the distance between two adjacent fence posts is 30 mm.

[0049] Furthermore, the roller 1-1 is provided with an internal bracket comprising spokes 1-10 and connecting bars 1-11. Six spokes 1-10 are radially and evenly distributed along the inner wall of each end face of the roller 1-1. The inner ends of the spokes 1-10 are connected to the roller shaft 1-4. The spokes 1-10 on the two inner end faces of the roller 1-1 are symmetrically arranged. Six connecting bars 1-11 are provided on the inner side walls of the roller 1-1. The outer ends of the spokes 1-10 on the two inner end faces are connected by the connecting bars 1-11. This design innovatively adds an internal bracket, securely welded to both ends and three inner walls of the roller shaft 1-4, significantly enhancing the structural stability and ensuring the reliability of the depilling mechanism.

[0050] The roller mechanism removes the hair from the chestnuts through friction, squeezing, and striking. The roller 1-1 is designed with a hollow structure to reduce material usage, thereby reducing overall weight and the load on the motor, which contributes to improved energy efficiency. The roller 1-1 has a diameter of 300mm and a length of 584mm, ensuring a sufficient processing range. The densely packed nails 1-2 on the roller 1-1 are 20mm in diameter and precisely 67.5mm in length. Each nail is welded to the roller using electric welding. The nail heads 1-9 are specially processed into a spherical shape and covered with a soft rubber sleeve. This protects the chestnuts from damage and reduces the breakage rate during hair removal, balancing efficiency and fruit integrity.

[0051] The box assembly is firmly placed and fixed on the frame 4 of the chestnut depilatory machine. In order to ensure a solid connection between the box and the frame 4, five M8 hexagonal bolts that meet the C-level standard are used on each side, for a total of ten bolts, to ensure the stability and durability of the overall structure.

[0052] An angled feed hopper 1-7 is integrated into the lid 1-5, facilitating easy introduction of chestnut hair pellets into the enclosure. The enclosure's internal dimensions ensure ample handling space. 50mm-diameter ventilation holes are located on both sides of the base 1-6, facilitating air circulation within the enclosure. The lid 1-5 also features 50mm-diameter through-holes. To match the height of the built-in vertical bearing housing, a 50mm gradient section is designed at the lower edge of the lid 1-5 to ensure seamless assembly.

[0053] A set of fences 1-3 are welded inside the housings 1-6. These bars are made of 16mm diameter, 578mm long, threaded steel. The threaded design on the steel bars increases friction with the chestnut balls, improving both the efficiency and thoroughness of depilation. The fence posts are spaced 30mm apart, effectively screening successfully depilled chestnuts for smooth passage to the vibrating screen below while allowing undepilled chestnuts to continue undergoing the nailing process until all are completely depilled.

[0054] like Figure 4 Figure 5 As shown, the vibration separation device 2 includes a vibrating screen, which includes a screen 2-1, a screen plate 2-2 and a connecting rod drive mechanism, wherein the screen plate 2-2 is arranged below the screen 2-1, and the screen plate 2-2 is connected to the screen 2-1;

[0055] The connecting rod driving mechanism includes a connecting rod seat 2-4, a first connecting rod 2-5 and a second connecting rod 2-6; the connecting rod seat 2-4 is rotatably connected to one end of the second connecting rod 2-5, the first connecting rod 2-5 is a cam, the other end of the second connecting rod 2-6 is rotatably connected to the protrusion of the cam, and the cam is connected to the motor 1-8 through a rotating shaft; the connecting rod seat 2-4 is connected to the rear side wall of the sieve tray 2-2; the left and right side walls of the sieve tray 2-2 are connected to the support side plates 2-8 through support bars 2-7;

[0056] The sieve holes 2-9 on the sieve 2-1 have a diameter of 30 mm.

[0057] Furthermore, the vibration frequency of the vibrating screen is 15 times / second.

[0058] Furthermore, the screen 2-1 and the screen plate 2-2 are tilted downwards at an angle of 5° to the horizontal plane.

[0059] The connecting rod drive mechanism is a crucial component of the entire machine. Its core components include the first connecting rod 2-5, a stopper 2-10, a precision hexagon socket countersunk screw, the second connecting rod 2-6, and a stable connecting rod base 2-4. This combination, powered by power input from the motor 1-8, activates the dynamic operation of the cam in the first connecting rod 2-5, which in turn drives the second connecting rod 2-6 and the connecting rod base 2-4 to perform a regular reciprocating motion. The connecting rod base 2-4 is fixed to the vibrating screen disc 2-2, allowing the disc to swing freely within a preset range. This design simulates vibration and improves screening efficiency.

[0060] Based on research into chestnut fruit size, the aperture of sieve 2-9 was set to 30mm, ensuring that the chestnuts fall smoothly onto the sieve plate while larger pellets are retained on the screen. Sieve 2-1 and sieve plate 2-2 are tilted at a 5° angle, allowing the chestnuts and pellets to naturally slide toward the vibrating screen's outlet port, sieve opening 2-3. The vibration frequency is set at 15 vibrations per second.

[0061] During operation, the pulley drives the cam to rotate, which drives the movement of the connecting rod mechanism. Driven by the connecting rod mechanism, the screen 2-1 and the screen plate 2-2 make reciprocating motion together, and the chestnut balls are separated into chestnut fruits and balls through the roller mechanism and the fence 1-3 above and fall onto the vibrating screen. The lighter chestnut balls will float on the surface, and the heavier chestnuts and some smaller debris will pass through the screen holes 2-9 and fall onto the screen plate 2-2. Due to the bevel angle and vibration, the chestnut fruits and balls will be smoothly transported to the vibrating screen mouth 2-3, achieving the effect of transmission and separation.

[0062] The blowing separation device 3 includes a fan 3-1. The design of the fan 3-1 cooperates with the vibrating screen device and adopts an open structure. By using the wind power of the fan, it can remove the hair balls and debris on the chestnut fruits, so that the hard chestnut fruits are completely separated from the hair balls, thereby achieving separation and purity of the chestnut fruits.

[0063] like Figure 1 As shown, it includes a frame 4, the box assembly, roller 1-1, vibrating screen, supporting side plate 2-8, fan 3-1 and motor 1-8, etc., are all arranged on the frame 4, and the motor 1-8 is connected to the roller shaft 1-4 of the roller 1-1 through a belt;

[0064] A waste baffle 5 is included, which is arranged on the frame 4 and located in front of the sieve plate 2-2 to block hair balls and debris to prevent them from being blown too far away by wind.

[0065] It includes a collecting device 6, which is arranged below the sieve plate 2-2 and below the vibrating sieve opening 2-3, and is used to collect the chestnut fruits after the hair balls are removed.

[0066] During use, chestnut balls enter the processing space through the feed hopper 1-7, and first pass through the friction, squeezing and hitting of the roller 1-1, nailing 1-2 and fence 1-3. The broken balls and chestnut fruits fall onto the screen 2-1 through the fence 1-3 below. The movement of the screen 2-1 is controlled by the connecting rod mechanism. The screen 2-1 has a certain inclination. Under vibration, the balls with lighter mass and larger surface area will remain on the screen 2-1, and the chestnut fruits and smaller balls will fall onto the screen plate 2-2 through the screen holes 2-9. When the balls and chestnut fruits reach the vibrating screen mouth 2-3 of the vibrating screen through vibration, due to the action of the fan, the lighter chestnut balls and ball debris will be blown out, while the chestnut fruits will not be blown away by the wind force of the fan due to their larger mass, and will fall onto the collecting device 6 below, thus completing the de-balling process of the chestnut fruit.

[0067] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A chestnut pilling machine, characterized in that: include A hair ball crushing device (1) is used to crush the hair ball layer on the surface of chestnut fruit. The roller (1-1) in the hair ball crushing device (1) is provided with nails (1-2) to crush the hair ball layer, so that the chestnut fruit and the hair ball are separated. The chestnut fruit and the fallen hair ball enter the vibration separation device through the fence (1-3) that plays a separating role. A vibration separation device (2) is used to separate chestnut fruits and hair balls. The vibration separation device (2) is provided with a vibration screen. The chestnut fruits pass through the screen (2-1) of the vibration screen and fall onto the screen plate (2-2), while the hair balls remain on the screen (2-1). The front end of the vibration screen is tilted downward, and the chestnut fruits and hair balls are transported to the vibration screen opening (2-3) at the front end of the vibration screen by vibration. The air blowing separation device (3) is used to separate the chestnut fruits and hair balls falling from the vibrating screen opening (2-3) by wind power. The fan (3-1) in the air blowing separation device (3) is arranged below the vibrating screen, and the air outlet of the fan (3-1) is oriented obliquely upward from the vibrating screen opening.

2. The chestnut hair removal machine according to claim 1, characterized in that: The hair ball crushing device (1) comprises A roller (1-1), the roller (1-1) is in the shape of a hollow cylinder, and densely arranged nails (1-2) are provided on the outer surface of the roller (1-1), the nails (1-2) are arranged in rows and are parallel to the roller axis (1-4) of the roller (1-1), and two adjacent rows of nails (1-2) are gradually staggered and arranged; A box assembly is used to cooperate with a roller (1-1) to destroy the hairy layer on the surface of chestnut fruits and separate chestnuts with unbroken hairy layers from chestnut fruits with the hairy layers removed and the broken hairy layers; the box assembly comprises a box cover (1-5), a box seat (1-6), a feed hopper (1-7) and a fence (1-3); the feed hopper (1-7) is arranged on the box cover (1-5); the fence (1-3) is arranged in the box seat (1-6), and the fence (1-3) is used to pass chestnut fruits with the hairy layers removed and the broken and detached hairy layers; the box cover (1-5) and the box seat (1-6) form a hollow processing space; The roller (1-1) is arranged in a processing space formed by a box cover (1-5) and a box seat (1-6), and a roller shaft (1-4) of the roller (1-1) is connected to a motor (1-8).

3. The chestnut hair removal machine according to claim 1, characterized in that: The vibration separation device (2) includes a vibrating screen, which includes a screen (2-1), a screen plate (2-2) and a connecting rod driving mechanism, wherein the screen plate (2-2) is arranged below the screen (2-1), and the screen plate (2-2) is connected to the screen (2-1); The connecting rod driving mechanism comprises a connecting rod seat (2-4), a first connecting rod (2-5) and a second connecting rod (2-6); the connecting rod seat (2-4) is rotatably connected to one end of the second connecting rod (2-6); the first connecting rod (2-5) is a cam; the other end of the second connecting rod (2-6) is rotatably connected to the protrusion of the cam; the cam is connected to the motor (1-8) via a rotating shaft; the connecting rod seat (2-4) is connected to the rear side wall of the sieve plate (2-2); the left and right side walls of the sieve plate (2-2) are connected to the supporting side plates (2-8) via support bars (2-7); The mesh holes (2-9) on the sieve (2-1) have a diameter of 30 mm.

4. The chestnut hair removal machine according to claim 2, characterized in that: The roller (1-1) has a diameter of 300 mm and a length of 584 mm; the nailing (1-2) has a diameter of 20 mm and a length of 67.5 mm; and the processing space has a diameter of 500 mm and a length of 600 mm.

5. The chestnut pilling machine according to claim 1, 2 or 4, characterized in that: The nail head (1-9) of the nailing (1-2) is spherical, and the surface of the nail head (1-9) is covered with a 2.5 mm thick soft rubber sleeve.

6. The chestnut hair removal machine according to claim 2, characterized in that: The adjacent nails (1-2) in the same row are spaced 70mm apart; the nails in two adjacent rows (1-2) are gradually staggered by 30mm.

7. The chestnut hair removal machine according to claim 2, characterized in that: The fence posts of the fence (1-3) are made of threaded steel, each fence post has a diameter of 16 mm and a length of 578 mm; the distance between two adjacent fence posts is 30 mm.

8. The chestnut pilling machine according to claim 3, characterized in that: The vibration frequency of the vibrating screen is 15 times / second.

9. The chestnut pilling machine according to claim 3, characterized in that: The screen (2-1) and the screen plate (2-2) are inclined downwards at an angle of 5° to the horizontal plane.

10. The chestnut hair removal machine according to claim 2, characterized in that: An internal bracket is provided in the roller (1-1), and the internal bracket includes spokes (1-10) and connecting bars (1-11). Six spokes (1-10) are provided on the inner wall of each end surface of the roller (1-1). The six spokes (1-10) are radially and evenly distributed on the inner wall of the end surface of the roller (1-1). The inner ends of the spokes (1-10) are connected to the roller shaft (1-4). The spokes (1-10) on the two inner end surfaces of the roller (1-1) are symmetrically arranged. The connecting bars (1-11) are provided on the inner wall of the side surface of the roller (1-1), and the number of the connecting bars (1-11) is six. The outer ends of the spokes (1-10) on the two inner end surfaces are connected via the connecting bar (1-11).

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