CN112335917B

CN112335917B - Semi-automatic garlic root and stem cutting machine

Info

Publication number: CN112335917B
Application number: CN202011202632.8A
Authority: CN
Inventors: 吴天泽
Original assignee: Qilu University of Technology
Current assignee: Qilu University of Technology
Priority date: 2020-11-02
Filing date: 2020-11-02
Publication date: 2022-07-05
Anticipated expiration: 2040-11-02
Also published as: CN112335917A

Abstract

Semi-automatic garlic cuts root stem cutter, including table surface, the table surface bottom is equipped with the support, installs the chain of arranging along table surface length direction on the support, and the sprocket is all installed in the cooperation in the both ends of chain, still installs step motor on the support, and step motor's output shaft links to each other with the shaft of front end sprocket. The invention has the positive effects that: the garlic cutting machine has the advantages of simple structure, convenience and quickness in operation, accurate and standard cutting position, time and labor saving, improvement on the whole cutting efficiency, reduction in production cost, improvement on the mechanization degree of rootstock cutting, and suitability for processing different types of garlic.

Description

Semi-automatic garlic root and stem cutting machine

Technical Field

The invention relates to the technical field of garlic processing equipment, in particular to a semi-automatic garlic root and stem cutting machine.

Background

Garlic is liked by people as a long-standing crop and a widely-applied seasoning product, and is generally planted in many places in China, seedling removing and root cutting work is needed during harvesting, so that export selling or subsequent deep processing requirements are met, at present, root and stem cutting operation of garlic mainly depends on manual cutting, certain safety risk exists, efficiency and quality of cutting operation cannot be guaranteed, and the problems that garlic is inaccurate in positioning, high in fruit damage rate, low in cutting operation efficiency and the like commonly exist in the existing root and stem cutting device on the market.

Disclosure of Invention

In order to solve the above problems, the present invention provides a semi-automatic garlic root and stem cutting machine, which has a simple structure and is convenient to operate, and can realize semi-automatic mechanical garlic root and stem cutting operation, thereby reducing labor cost and effectively improving efficiency and quality of cutting operation.

The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a semi-automatic garlic root and stem cutting machine, which comprises a worktable, wherein the bottom of the worktable is provided with a bracket, the bracket is provided with a chain arranged along the length direction of the worktable, both ends of the chain are respectively provided with a chain wheel in a matching way, the bracket is also provided with a stepping motor, the output shaft of the stepping motor is connected with the wheel shaft of the front chain wheel, the periphery of the chain is also provided with a plurality of garlic placing assemblies, the worktable is provided with a strip groove matched with the garlic placing assemblies corresponding to the position of the chain, the garlic placing assemblies can move to the upper side of the worktable along with the chain, each garlic placing assembly comprises a cup seat bracket fixed on the chain, a vertical plate at one side of the cup seat bracket is provided with a root clamping groove, a vertical plate at the other side of the cup seat bracket is provided with a stem clamping groove, a guide rod is also arranged on the base of the cup seat bracket, and a cup seat capable of sliding along the guide rod is arranged on the guide rod in a matching way, the cup seat comprises a clamping plate and a vertical plate, wherein the clamping plate is close to one side of a clamping groove, the vertical plate is close to one side of a clamping stem groove, an arc-shaped groove plate is connected between the clamping plate and the vertical plate, a first spring is sleeved at the periphery of a guide rod between the clamping plate and a cup seat support, the first spring always tends to make the clamping plate close to the clamping stem groove, the clamping plate is mounted on two sides of the clamping plate through a torsional spring, an arc edge is arranged at the upper end of the clamping plate, a baffle plate is mounted on the outer side of the clamping plate, a stop block matched with the baffle plate is mounted on two sides of the clamping plate, the torsional spring always tends to make the baffle plate rotate to be in contact with the stop block, namely, the arc edges of the clamping plates on two sides always tend to rotate to be close to, a cutter device is further mounted on the working table top, a garlic assembly can cut off the rhizome of garlic after passing through the cutter device, and corresponds to the position of a front-end chain wheel, and a blanking chute is arranged on the bracket. The garlic harvester is characterized in that the cutting device comprises a knife rest arranged on a support, a first rotating shaft is arranged on the upper portion of the knife rest, first cutters are arranged at positions on two sides of the first rotating shaft, a second rotating shaft is arranged at the bottom of the knife rest, second cutters arranged corresponding to the first cutters are arranged at positions on two sides of the second rotating shaft respectively, the garlic placing assembly is located between the first cutters and the second cutters, the first cutters and the second cutters on one side correspond to the clamping root groove positions, the first cutters and the second cutters on the other side correspond to the clamping stem groove positions, a first belt wheel is coaxially arranged at one end of the first rotating shaft, a second belt wheel is coaxially arranged at one end of the second rotating shaft, a synchronous belt is arranged between the first belt wheel and the second belt wheel, a motor is further arranged on the support, an output shaft of the motor is connected with the second belt wheel through a coupler, and a cutter shield is further arranged on the knife rest in a covering manner, a rhizome leakage groove is also arranged on the working table surface corresponding to the position of the tool rest. The first cutters and the second cutters on the same side are arranged in a staggered mode, and an overlapping area of 8-15mm is arranged in the height position. The both ends of cup support bottom all are connected with the chain through the folded plate, and the folded plate is including fixing the horizontal plate in cup support bottom and the vertical board that is connected with the chain, and the distance between the vertical board of both sides equals with the width distance of chain, the width at rectangular groove both ends cooperatees with the width of cup support respectively, and the width of rectangular groove intermediate position then cooperatees with the chain width, and when vertical board was located the rectangular inslot of narrower distance, the horizontal plate was located table surface. The guide rod is provided with a spring seat, the spring seat is positioned between the clamping plate and the vertical plate provided with the stem clamping groove, and a first spring is sleeved on the periphery of the spring seat. A tensioning adjusting device is arranged between a chain wheel at the rear end of the chain and the support and comprises a welding spiral ring fixed on the support, a tensioning stud is arranged in the welding spiral ring in a matched mode, a limiting boss is arranged at one end of the tensioning stud and located in the welding spiral ring and can rotate freely, a tensioning block is arranged at the other end of the tensioning stud in a threaded matched mode, and the tensioning block is fixedly connected with a bearing seat on the chain wheel rotating shaft. Install the square pole on the base of cup support, the square pole is arranged with the guide bar is perpendicular, and the square pole is located the clamp plate and offers between the riser in root clamping groove, and the cooperation is installed and is followed its gliding wedge on the square pole, and the square pole periphery cover of wedge front end is equipped with the second spring, and the second spring has the trend that promotes the wedge and move backward all the time, when the garlic laid the assembly and rotated to the vertical state of chain front end, the wedge can compress the second spring under the dead weight and move down.

The invention has the positive effects that: according to the semi-automatic garlic root and stem cutting machine, garlic is placed into the placing assembly manually and passes through the cutter device, so that the garlic roots and stems can be cut off, compared with the traditional manual garlic cutting, the risk in the working process is effectively avoided, the labor intensity of operators is reduced, garlic heads of different sizes can be accurately positioned by the garlic placing assembly, the garlic roots and stems can be cut off cleanly, meanwhile, the remaining quality of the remaining garlic bodies is guaranteed, compared with the existing garlic root and stem cutting machine, the semi-automatic garlic root and stem cutting machine further has the advantages of being simple in structure, convenient to operate, accurate and standard in cutting position, time-saving and labor-saving, the overall cutting efficiency can be improved, the production cost can be reduced, the mechanical degree of root and stem cutting is improved, and the machine is suitable for processing of different kinds of garlic.

Drawings

FIG. 1 is a front view of the present invention;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a left side view of FIG. 1;

FIG. 4 is a schematic three-dimensional view of a garlic positioning assembly;

FIG. 5 is a front view of the garlic placement assembly;

FIG. 6 is a left side view of FIG. 5;

FIG. 7 is a schematic view showing the garlic placement assembly after placement of garlic therein;

FIG. 8 is an enlarged view of the cross-sectional view taken along line A-A of FIG. 1;

FIG. 9 is an enlarged partial view of I of FIG. 8;

FIG. 10 is an enlarged partial view of II of FIG. 2;

FIG. 11 is a sectional view taken along line B-B of FIG. 10;

FIG. 12 is a schematic view of the tension adjusting device;

fig. 13 is a schematic view of the structure of the wedge block mounted on the cup holder.

Detailed Description

The invention relates to a semi-automatic garlic root and stem cutting machine, which comprises a working table top 1, wherein a support 2 is arranged at the bottom of the working table top 1, a chain 3 arranged along the length direction of the working table top 1 is arranged on the support 2, chain wheels 4 are arranged at two ends of the chain 3 in a matching way, a stepping motor 5 is further arranged on the support 2, an output shaft of the stepping motor 5 is connected with a wheel shaft of the chain wheel 4 at the front end, and the stepping motor 5 is started to drive the chain wheel 4 to rotate so as to drive the chain 3 to reciprocate as shown in figure 3.

The assembly is laid to a plurality of garlic still installed to the periphery of chain 3, and corresponding to the position of chain 3, seted up on table surface 1 and laid assembly matched with rectangular groove 6 with the garlic, the garlic is laid the assembly and can be followed chain 3 and removed to 1 upside of table surface, also can remove to 1 bottom of table surface position, along with 3 reciprocating motion of chain come and go between 1 upside of table surface and 1 bottom of table surface, the completion is to the root cutting stem cutting operation of garlic above that.

As shown in fig. 4, 5 and 6, the garlic placing assembly comprises a cup holder support 7 fixed on the chain 3, the cup holder support 7 comprises a bottom plate and a vertical plate arranged on two sides of the bottom plate, a clamping groove 8 is formed in the vertical plate on one side of the cup holder support 7 and used for fixing the root of the garlic, a stem clamping groove 9 is formed in the vertical plate on the other side of the cup holder support 7 and used for fixing the stem of the garlic, a guide rod 10 is further arranged on a base of the cup holder support 7, as shown in fig. 6, one end of the guide rod 10 is fixed on the vertical plate provided with the stem clamping groove 9, and a certain distance is reserved between the fixed position of the other end of the guide rod 10 and the vertical plate provided with the clamping groove 8. The gliding cup of guide bar 10 can be followed to the cooperation installation on the guide bar 10, and the cup is used for fixing the fruit garlic body installation of garlic, the cup is including pressing from both sides dress board 11 and riser 12, and wherein pressing from both sides dress board 11 and be close to card root groove 8 one side, and riser 12 is close to card stem groove 9 one side, is connected with arc frid 13 between pressing from both sides dress board 11 and the riser 12, and arc frid 13 is the shape of cooperation garlic body convex surface, guide bar 10 periphery cover between clamp dress board 11 and the cup support 7 is equipped with first spring 14, and first spring 14 has the trend that makes clamp dress board 11 be close to card root groove 8 all the time. As shown in fig. 5, the clamping plates 16 are respectively mounted on both sides of the clamping plate 11 through the torsion springs 15, the upper ends of the clamping plates 16 are provided with the arc edges 17, the baffle plates 18 are mounted on the outer sides of the clamping plates 16, the stoppers 19 matched with the baffle plates 18 are respectively mounted on both sides of the clamping plate 11 corresponding to the positions of the baffle plates 18, the torsion springs 15 always have a tendency that the baffle plates 18 rotate to be in contact with the stoppers 19, that is, the arc edges 17 of the clamping plates 16 on both sides always have a tendency of rotating to approach, that is, the state shown in fig. 5 is a schematic diagram of a state that garlic is not put in the garlic placement assembly.

When garlic needs to be put in, firstly aligning the root of the garlic with the position of the root clamping groove 8, then pressing the garlic downwards into the cup seat, because the arc edges 17 arranged on the clamping plates 16 at the two sides can push the arc edges 17 to overcome the elasticity of the torsion spring 15 to open the clamping plates 16 in the downward moving process of the garlic, when the garlic enters the arc-shaped groove plates 13, because the first spring 14 is arranged, the clamping plates 11 can compress the first spring 14 according to the diameter of the garlic to move on the guide rod 10 until the root of the garlic enters the root clamping groove 8 and the stem of the garlic enters the stem clamping groove 9, namely the cup seat structure is suitable for placing different sizes of garlic, and after the garlic is placed in place, the first spring 14 can push the clamping plates 11 to press the garlic tightly on the vertical plate provided with the root clamping groove 8, as shown in figure 7, under the elasticity of the torsion spring 15, the clamping plates 16 can also rotate to press the garlic, fixing the garlic in the cup seat. The garlic placing assembly at the bottom of the working table top 1 can rotate again to penetrate through the overlong grooves 6 to enter the upper side position of the working table top 1 under the driving of the chain 3, and then the garlic is placed manually, so that the garlic placing assembly can move back and forth and can be recycled after passing through the cutter device.

As shown in fig. 8, the cutting device includes a knife rest 21 mounted on the support 2, a first rotating shaft 22 is mounted on the upper portion of the knife rest 21, first cutters 23 are mounted on two sides of the first rotating shaft 22, a second rotating shaft 24 is mounted at the bottom of the knife rest 21, second cutters 25 corresponding to the first cutters 23 are mounted on two sides of the second rotating shaft 24, the garlic placing assembly is located between the first cutters 23 and the second cutters 25, the first cutters 23 and the second cutters 25 on one side correspond to the root clamping grooves 8, the first cutters 23 and the second cutters 25 on the other side correspond to the stem clamping grooves 9, and when the garlic placing assembly passes through the cutting device, the garlic placing assembly is used for cutting off rhizomes on two sides. One end of the first rotating shaft 22 is coaxially provided with a first belt pulley 26, one end of the second rotating shaft 24 is coaxially provided with a second belt pulley 27, a synchronous belt 28 is arranged between the first belt pulley 26 and the second belt pulley 27, the support 2 is further provided with a motor 29, an output shaft of the motor 29 is connected with the second belt pulley 27 through a coupler, and the motor 29 can be started to drive the first cutter 23 and the second cutter 25 to synchronously rotate so as to complete the cutting of the root and stem of the garlic. In order to ensure the normal rotation of the cutter, avoid external dust or sundry scraps from influencing the cutting operation of the rootstocks, protect the safety of operators and avoid safety accidents, a cutter shield 30 is also covered and installed on the cutter frame 21. When the garlic placing assembly cuts off the roots and stems through the cutter device, in order to clean the cut-off roots and stems in time, the positions corresponding to the cutter rest 21 are further provided with the root and stem leakage grooves 31 on the working table surface 1, the cut-off roots and stems fall off from the root and stem leakage grooves 31, accumulation on the working table surface 1 is avoided, and subsequent flow cutting operation is facilitated.

Further, in order to increase the rhizome cutting rate, as shown in fig. 9, the first cutters 23 and the second cutters 25 on the same side are arranged in a staggered manner, an overlapping area of 8-15mm is formed in the height position, and the cutters which are arranged in a vertically corresponding manner and in a staggered manner can effectively improve the rhizome cutting operation, so that the phenomena of continuous cutting and incomplete cutting are avoided.

After the garlic placement assembly rotates to the upper side of the working table board 1, in order to ensure the stability of the garlic placement assembly moving along with the chain 3 and avoid shaking, and further ensure that the cutting knife can cut off rootstocks, as shown in figures 10 and 11, two ends of the bottom of the cup holder support 7 are connected with the chain 3 through folded plates, each folded plate comprises a horizontal plate 32 fixed at the bottom of the cup holder support 7 and a vertical plate 33 connected with the chain 3, the distance between the vertical plates 33 at two sides is equal to the width distance of the chain 3, the widths of two ends of the long groove 6 are respectively matched with the width of the cup holder support 7, so that the garlic placement assembly can rotate from the bottom of the working table board 1 to the upper side, the width of the middle position of the long groove 6 is matched with the width of the chain 3, when the garlic placement assembly rotates to the upper side of the working table board 1, the vertical plates 33 are positioned in the long groove 6 with a narrow distance, the horizontal plate 32 is arranged on the working table surface 1, and the folded plate at the bottom of the cup holder support 7 can effectively prevent the whole garlic placing assembly from shaking, so that the cutter can accurately cut off the rhizome.

Further, as shown in fig. 6, a spring seat 34 is installed on the guide rod 10, the spring seat 34 is located between the clamping plate 11 and the vertical plate provided with the stem clamping groove 9, a first spring 14 is sleeved on the periphery of the spring seat 34, wherein the spring seat 34 can limit the right movement of the cup seat in the direction shown in fig. 6, when the clamping plate 11 moves to contact with the spring seat 34, the cup seat cannot move to the right, the first spring 14 can be effectively prevented from being excessively compressed to lose the original elasticity, and the normal use of the garlic placing assembly is further ensured.

Further, in order to keep the chain 3 tensioned during the transmission process and ensure the normal operation of the garlic placement assembly thereon, as shown in fig. 12, a tension adjusting device is installed between the chain wheel 4 at the rear end of the chain 3 and the support 2, the tension adjusting device includes a welding spiral ring 35 fixed on the support 2, a tension stud 36 is installed in the welding spiral ring 35 in a matching manner, one end of the tension stud 36 is provided with a limiting boss 37, the limiting boss 37 is located in the welding spiral ring 35 and can freely rotate, a tension block 38 is screwed to the other end of the tension stud 36, the tension block 38 is fixedly connected with a bearing seat on the rotating shaft of the chain wheel 4, and when the tension stud 36 is rotated, the tension block 38 can push the bearing seat on the rotating shaft of the chain wheel 4, so as to ensure that the chain 3 is always kept tensioned during the transmission process.

In order to ensure that the garlic placing assembly can smoothly break away from the garlic inside the garlic placing assembly when rotating to the front end along with the chain 3 and fall onto the blanking chute 20, as shown in fig. 13, a square rod 39 is installed on the base of the cup holder support 7, the square rod 39 is vertically arranged with the guide rod 10, the square rod 39 is positioned between the clamping plate 11 and the vertical plate provided with the clamping groove 8, a wedge-shaped block 40 capable of sliding along the square rod 39 is installed on the square rod 39 in a matching manner, a second spring 41 is sleeved on the periphery of the square rod 39 at the front end of the wedge-shaped block 40, the second spring 41 always has a tendency of pushing the wedge-shaped block 40 to move backwards, and when the garlic placing assembly rotates to the vertical state at the front end of the chain 3, the wedge-shaped block 40 can compress the second spring 41 to move downwards under the self weight. When the garlic is not placed, the second spring 41 pushes the wedge block 40 to the rear end of the square rod 39, and at this time, the wedge block 40 does not affect the placement of the garlic, after the garlic placing assembly cuts off rootstocks through the cutter device, the garlic placing assembly continuously moves to the position of the chain wheel 4 at the front end along with the chain 3, then the garlic placing assembly rotates to a vertical state, at the moment, the square rod 39 is also in a vertical state, the garlic moves downwards under the action of self weight and overcomes the elasticity of the second spring 41, the inclined plane on the wedge-shaped block 40 contacts the garlic and pushes the garlic to separate from the clamping plate 11 in the downward moving process, so that the garlic is smoothly separated from the cup seat, after the garlic is separated, the whole garlic placing assembly can continuously rotate along with the chain 3 and rotate to the upper position from the bottom of the working table surface 1 again, under the action of gravity and the elastic force of the second spring 41, the wedge block 40 is restored to the initial position, and the next recycling use is not influenced.

The technical solution of the present invention is not limited to the scope of the embodiments of the present invention. The technical contents not described in detail in the present invention are all known techniques.

Claims

1. A semi-automatic garlic root and stem cutting machine is characterized in that: comprises a worktable surface (1), a bracket (2) is arranged at the bottom of the worktable surface (1), a chain (3) which is arranged along the length direction of the worktable surface (1) is arranged on the bracket (2), chain wheels (4) are arranged at the two ends of the chain (3) in a matching way, a stepping motor (5) is arranged on the bracket (2), the output shaft of the stepping motor (5) is connected with the wheel shaft of the front chain wheel (4), a plurality of garlic placing assemblies are arranged at the periphery of the chain (3) and correspond to the positions of the chain (3), a strip groove (6) which is matched with the garlic placing assemblies is arranged on the worktable surface (1), the garlic placing assemblies can move to the upper side of the worktable surface (1) along with the chain (3), each garlic placing assembly comprises a cup seat bracket (7) fixed on the chain (3), a vertical plate at one side of the cup seat bracket (7) is provided with a clamping groove (8), a clamping stem groove (9) is formed in a vertical plate on the other side of the cup holder support (7), a guide rod (10) is further arranged on a base of the cup holder support (7), a cup holder capable of sliding along the guide rod (10) is installed on the guide rod (10) in a matched mode, the cup holder comprises a clamping plate (11) and a vertical plate (12), wherein the clamping plate (11) is close to one side of the clamping stem groove (8), the vertical plate (12) is close to one side of the clamping stem groove (9), an arc-shaped groove plate (13) is connected between the clamping plate (11) and the vertical plate (12), a first spring (14) is sleeved on the periphery of the guide rod (10) between the clamping plate (11) and the cup holder support (7), the first spring (14) always tends to enable the clamping plate (11) to be close to the clamping stem groove (8), clamping plates (16) are installed on two sides of the clamping plate (11) through torsion springs (15), and an arc edge (17) is arranged at the upper end of each clamping plate (16), the outer side of the clamping plate (16) is provided with a baffle (18), corresponding to the position of the baffle (18), two sides of the clamping plate (11) are respectively provided with a stop block (19) matched with the baffle (18), a torsional spring (15) always has the tendency that the baffle (18) rotates to be contacted with the stop blocks (19), namely, the arc edges (17) of the clamping plates (16) at two sides always have the tendency of rotating to approach, a cutter device is also arranged on the working table top (1), a garlic placing assembly can cut off the rootstalks of garlic after passing through the cutter device, corresponding to the position of a front end chain wheel, a blanking chute (20) is arranged on the bracket (2), a spring seat (34) is arranged on the guide rod (10), the spring seat (34) is positioned between the clamping plate (11) and a vertical plate provided with a stem clamping groove (9), a first spring (14) is sleeved on the periphery of the spring seat (34), a square rod (39) is arranged on the base of the cup seat bracket (7), square pole (39) and guide bar (10) are arranged perpendicularly, square pole (39) are located between clamp plate (11) and the riser of seting up root groove (8), cooperation installation is followed its gliding wedge (40) on square pole (39), square pole (39) periphery cover of wedge (40) front end is equipped with second spring (41), second spring (41) have the trend that promotes wedge (40) and move back all the time, when the garlic is laid the assembly and is rotated to the vertical state of chain (3) front end, wedge (40) can compress second spring (41) and move down under the dead weight.

2. A semi-automatic garlic root and stem cutting machine as claimed in claim 1, wherein: the cutting knife device comprises a knife rest (21) arranged on a support (2), a first rotating shaft (22) is arranged on the upper portion of the knife rest (21), first cutters (23) are arranged at positions of two sides of the first rotating shaft (22), a second rotating shaft (24) is arranged at the bottom of the knife rest (21), second cutters (25) arranged corresponding to the first cutters (23) are arranged at positions of two sides of the second rotating shaft (24) respectively, a garlic placing assembly is located between the first cutters (23) and the second cutters (25), the first cutters (23) and the second cutters (25) on one side correspond to the positions of a clamping root groove (8), the first cutters (23) and the second cutters (25) on the other side correspond to the positions of a clamping stem groove (9), a first belt wheel (26) is coaxially arranged at one end of the first rotating shaft (22), a second belt wheel (27) is coaxially arranged at one end of the second rotating shaft (24), install hold-in range (28) between first band pulley (26) and second band pulley (27), still install motor (29) on support (2), the output shaft of motor (29) is connected with second band pulley (27) through the shaft coupling, still covers on knife rest (21) and installs cutter guard shield (30), corresponds to the position of knife rest (21), still has seted up rhizome lou groove (31) on table surface (1).

3. A semi-automatic garlic root and stem cutting machine as claimed in claim 2, wherein: the first cutters (23) and the second cutters (25) on the same side are arranged in a staggered mode, and the height position of the first cutters and the second cutters is provided with an overlapping area of 8-15 mm.

4. A semi-automatic garlic root and stem cutting machine as claimed in claim 1, wherein: both ends of cup support (7) bottom all are connected with chain (3) through the folded plate, and the folded plate is including fixing horizontal plate (32) in cup support (7) bottom and vertical board (33) that are connected with chain (3), and the distance between the vertical board (33) of both sides equals with the width distance of chain (3), the width at rectangular groove (6) both ends cooperatees with the width of cup support (7) respectively, and the width of rectangular groove (6) intermediate position then cooperatees with chain (3) width, and when vertical board (33) were located rectangular groove (6) of narrower distance, horizontal plate (32) were located table surface (1).

5. A semi-automatic garlic root and stem cutting machine as claimed in claim 1, wherein: install between sprocket (4) and the support (2) of chain (3) rear end and rise tight adjusting device, rise tight adjusting device including fixing welding spiral ring (35) on support (2), the cooperation is installed in welding spiral ring (35) and is risen tight double-screw bolt (36), and the one end of rising tight double-screw bolt (36) is equipped with spacing boss (37), and spacing boss (37) are located welding spiral ring (35) and can the free rotation, and the other end screw-thread fit of rising tight double-screw bolt (36) has tight piece (38) that rises, rises tight piece (38) and sprocket (4) and changes epaxial bearing frame fixed connection.