Adjustable seeding device for rape planting

Abstract

The utility model relates to the related technical field of seeding devices, in particular to an adjustable seeding device for rape planting. The bottom of the storage tank is fixedly connected with a first conveying pipe, the bottom end of the first conveying pipe is fixedly connected with a quantitative box, the bottom of the quantitative box is fixedly connected with a second conveying pipe, and one side of the bottom of the second conveying pipe is fixedly connected with a semicircular ring. Under the matching action of the storage box, the first conveying pipe, the quantifying box, the second conveying pipe, the semicircular ring, the soil breaking mechanism and the linkage mechanism, when a user seeds rape seeds, the seeding depth can be adjusted according to the soil texture condition, and the seeding efficiency is improved. The adjustable sowing device for rape planting solves the problem that the germination rate and the survival rate of rape seeds are affected due to the fact that a user cannot control the sowing depth according to the soil texture because an existing adjustable sowing device for rape planting does not adjust the sowing depth.

Description

Technical Field

[0001] The utility model relates to the technical field of seeding devices, and particularly relates to an adjustable seeding device for rapeseed planting. Background Technique

[0002] Rapeseed can be sown in spring and autumn in different climate zones, rotated and intercropped with various crops, and interplanted. It can be planted in areas with one crop a year or multiple crops a year. When planting rapeseed, direct seeding is mostly used in the north, and seedlings are used for planting in the south. With the improvement of agricultural level, people begin to use mechanized production in agricultural production. Large agricultural machinery is becoming more and more advanced, bringing great convenience to agricultural production, but also bringing some inconvenience to the planting of small areas of land to a certain extent. Large modern planting machinery is difficult to operate on small areas of land. Therefore, handheld seeding devices are used for work on small areas of land.

[0003] The utility model patent with the publication number of CN218772899U discloses an adjustable small handheld seeder, belonging to the technical field of seeding devices, to solve the problem that the seeding amount of the existing dibbler is not accurate enough when controlling the seeding amount. It includes a vertical cylinder, the top of the vertical cylinder is fixedly connected with a fixed box, and the bottom is fixedly provided with a plug cone mechanism. The top of the fixed box is fixedly connected with a material cylinder, and the interiors of the material cylinder, the fixed box and the vertical cylinder are all interconnected. A turntable is rotatably arranged in the fixed box, and a number of grooves are evenly opened on the turntable. An insertion plate is inserted into the upper part of the fixed box, and the insertion plate is above the turntable. Through the arranged turntable and grooves, seeds can fall into the grooves, and then as the turntable rotates, only the seeds in one groove are sown at a time, so as to achieve the effect of quantitative seeding. By arranging the baffle plate, the number of seeds entering the grooves can be adjusted, thus solving the problem that it is not easy to control the seeding amount each time during seeding of the existing dibbler.

[0004] However, the above patent still has deficiencies: Although the patent can control the seeding amount, it does not have the function of adjusting the seeding depth, resulting in the user being unable to control the seeding depth according to the soil texture, thus affecting the germination rate and survival rate of rapeseed. Content of the Utility Model

[0005] In order to make up for the above deficiencies, the utility model provides an adjustable seeding device for rapeseed planting to solve the problem that the existing adjustable seeding device for rapeseed planting does not have the function of adjusting the seeding depth, resulting in the user being unable to control the seeding depth according to the soil texture, thus affecting the germination rate and survival rate of rapeseed as mentioned in the above background technique.

[0006] The technical solution of the utility model is as follows:

[0007] An adjustable seeding device for rapeseed planting, comprising: a storage tank; a first conveying pipe is fixedly connected to the bottom of the storage tank, a metering box is fixedly connected to the bottom end of the first conveying pipe, a second conveying pipe is fixedly connected to the bottom of the metering box, and a semi-circular ring is fixedly connected to one side of the bottom of the second conveying pipe; a soil-breaking mechanism for sowing rapeseed into the deep soil is arranged at the bottom of the semi-circular ring; a linkage mechanism for quantitatively sowing rapeseed is arranged inside the metering box.

[0008] Preferably, the soil-breaking mechanism comprises: a fixed cone is fixedly connected to the bottom of the semi-circular ring, a connecting frame is fixedly connected to the outer surface of the semi-circular ring, and a first rotating shaft is fixedly connected to one side of the connecting frame away from the semi-circular ring; a movable cone is rotatably connected to the outer surface of the first rotating shaft inside the connecting frame, and the movable cone is matched with the fixed cone; a seeding mechanism for controlling the movable cone to rotate around the first rotating shaft is arranged on the side of the movable cone away from the fixed cone.

[0009] Preferably, the seeding mechanism comprises: two first fixing blocks are fixedly connected to the side of the movable cone away from the fixed cone, a second rotating shaft is fixedly connected between the two first fixing blocks, a linkage rod is rotatably connected to the center of the second rotating shaft, a third rotating shaft is rotatably connected to the top end of the linkage rod, and two second fixing blocks are fixedly connected to both ends of the third rotating shaft, and both second fixing blocks are fixedly connected to a sliding rod; a pull rod is fixedly connected to one side of the top end of the sliding rod, a fixing rod is arranged at the top of the pull rod, and the fixing rod is fixedly connected to the first conveying pipe; an elastic mechanism for controlling the movable cone to reset is arranged on the side of the second conveying pipe close to the sliding rod.

[0010] Preferably, the elastic mechanism comprises: a first fixing plate is fixedly connected to the side of the second conveying pipe close to the sliding rod, a second fixing plate is arranged on the top of the first fixing plate, and the second fixing plate is fixedly connected to the second conveying pipe; a limiting plate is fixedly connected to the outer surface of the sliding rod close to the first fixing plate, a spring is arranged between the limiting plate and the second fixing plate, and the spring is sleeved on the outer surface of the sliding rod.

[0011] Preferably, the linkage mechanism comprises: a metering disk adapted to each other is arranged inside the metering box, a metering groove is formed in the top of the metering disk, a fourth rotating shaft is fixedly connected to the center of the metering disk, both ends of the fourth rotating shaft penetrate through the metering box and extend to the gears, and the gears are fixedly connected to the fourth rotating shaft, and the fourth rotating shaft is rotatably connected to the metering box; racks are meshed with one side of both gears, connecting rods are fixedly connected to both ends of the racks, and the connecting rods are fixedly connected to the sliding rod away from the racks, and the sliding rod is slidably connected to the metering box.

[0012] Preferably, a feeding port is provided at the top of the storage tank, and a sealing cover is threadedly connected to the outer surface of the feeding port.

[0013] Preferably, a pedal is fixedly connected to the second conveying pipe near the semi-circular ring, and a damping pad is fixedly connected to the top of the pedal.

[0014] Preferably, an adjusting plate is provided on the side of the fixed cone away from the movable cone, a bolt is provided on the side of the adjusting plate away from the fixed cone, one end of the bolt penetrates through the adjusting plate and extends into the interior of the fixed cone, the bolt is threadedly connected to the fixed cone, and a matching travel groove is provided at the position where the adjusting plate is close to the fixed cone.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] Firstly, through the cooperation of the storage box, the first conveying pipe, the metering box, the second conveying pipe, the semi-circular ring, the soil-breaking mechanism and the linkage mechanism, the present utility model can adjust the sowing depth according to the soil quality when the user sows rapeseed, solving the problem that the existing adjustable sowing device for rapeseed planting does not have the function of adjusting the sowing depth, resulting in the user being unable to control the sowing depth according to the soil quality, thus affecting the germination rate and survival rate of rapeseed.

[0017] Secondly, through the cooperation of the storage box, the first conveying pipe, the metering box, the second conveying pipe, the semi-circular ring, the soil-breaking mechanism and the linkage mechanism, the present utility model can open holes in the soil while sowing and quantitatively control the sowing amount, improving the uniformity of the number of rapeseeds in the pits, and thus improving the practicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a three-dimensional structural schematic diagram of an adjustable sowing device for rapeseed planting according to the present utility model;

[0019] Figure 2 is of the present utility model Figure 1 magnified structural schematic diagram at A in;

[0020] Figure 3 is of the present utility model Figure 1 magnified structural schematic diagram at B in;

[0021] Figure 4 is a side view sectional structural schematic diagram of an adjustable sowing device for rapeseed planting according to the present utility model;

[0022] Figure 5 is of the present utility model Figure 4Schematic diagram of the enlarged structure at position C;

[0023] Figure 6 For the present utility model Figure 4 Schematic diagram of the enlarged structure at position D;

[0024] Figure 7 Schematic diagram of the soil-breaking mechanism structure of the present utility model;

[0025] Figure 8 Schematic diagram of the linkage mechanism structure of the present utility model.

[0026] In the figure:

[0027] 1. Storage tank; 2. First conveying pipe; 3. Quantitative box; 4. Second conveying pipe; 5. Semi-circular ring; 6. Soil-breaking mechanism; 7. Linkage mechanism; 8. Fixed cone; 9. Connecting frame; 10. First rotating shaft; 11. Movable cone; 12. Sowing mechanism; 13. First fixing block; 14. Second rotating shaft; 15. Linkage rod; 16. Third rotating shaft; 17. Second fixing block; 18. Slide bar; 19. Pull rod; 20. Fixed rod; 21. Elastic mechanism; 22. First fixing plate; 23. Second fixing plate; 24. Limiting plate; 25. Spring; 26. Quantitative plate; 27. Quantitative groove; 28. Fourth rotating shaft; 29. Gear; 30. Rack; 31. Connecting rod; 32. Inlet; 33. Sealing cover; 34. Pedal; 35. Damping pad; 36. Adjusting plate; 37. Bolt; 38. Stroke groove. Specific embodiments

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0029] Please refer to Figures 1 to 8 , the present utility model details the above technical solutions through the following embodiments:

[0030] An adjustable seeding device for rapeseed planting, comprising: a storage tank 1; a first conveying pipe 2 fixedly connected to the bottom of the storage tank 1, a quantitative box 3 fixedly connected to the bottom end of the first conveying pipe 2, a second conveying pipe 4 fixedly connected to the bottom of the quantitative box 3, and a semi-circular ring 5 fixedly connected to one side of the bottom of the second conveying pipe 4; a soil-breaking mechanism 6 for sowing rapeseed into the deep soil is arranged at the bottom of the semi-circular ring 5; a linkage mechanism 7 for quantitatively sowing rapeseed is arranged inside the quantitative box 3. The user places the rapeseed into the storage tank 1, then inserts the soil-breaking mechanism 6 into the soil, and quantitatively sows the rapeseed into the deep soil through the cooperation of the soil-breaking mechanism 6 and the linkage mechanism 7.

[0031] As Figure 1 , Figure 3 , Figure 4 and Figure 7 shown, the soil-breaking mechanism 6 comprises: a fixed cone 8 fixedly connected to the bottom of the semi-circular ring 5, a connecting frame 9 fixedly connected to the outer surface of the semi-circular ring 5, and a first rotating shaft 10 fixedly connected to one side of the connecting frame 9 away from the semi-circular ring 5; a movable cone 11 is rotatably connected to the outer surface of the first rotating shaft 10 inside the connecting frame 9, and the movable cone 11 is matched with the fixed cone 8; a seeding mechanism 12 for controlling the movable cone 11 to rotate around the first rotating shaft 10 is arranged on the side of the movable cone 11 away from the fixed cone 8. The user inserts the fixed cone 8 and the movable cone 11 into the soil, and then controls the movable cone 11 to rotate around the first rotating shaft 10 through the seeding mechanism 12, so that the bottom of the movable cone 11 is separated from the bottom of the fixed cone 8, and the rapeseed is sown into the deep soil.

[0032] As Figure 1 and Figure 3 shown, the seeding mechanism 12 comprises: two first fixing blocks 13 fixedly connected to the side of the movable cone 11 away from the fixed cone 8, a second rotating shaft 14 fixedly connecting the two first fixing blocks 13, a linkage rod 15 rotatably connected to the center of the second rotating shaft 14, a third rotating shaft 16 rotatably connected to the top end of the linkage rod 15, and two second fixing blocks 17 fixedly connected to both ends of the third rotating shaft 16, and both second fixing blocks 17 are fixedly connected to a sliding rod 18; a pull rod 19 is fixedly connected to one side of the top end of the sliding rod 18, a fixing rod 20 is arranged at the top of the pull rod 19, and the fixing rod 20 is fixedly connected to the first conveying pipe 2; an elastic mechanism 21 for controlling the movable cone 11 to reset is arranged on the side of the second conveying pipe 4 close to the sliding rod 18. The user pulls the pull rod 19 through the fixing rod 20, the pull rod 19 drives the sliding rod 18, the sliding rod 18 drives the second fixing block 17, the second fixing block 17 drives the third rotating shaft 16, the third rotating shaft 16 pulls the top end of the linkage rod 15, so that the bottom end of the linkage rod 15 pulls the second rotating shaft 14, the second rotating shaft 14 drives the first fixing block 13, and the first fixing block 13 pulls the movable cone 11, so that the movable cone 11 rotates around the first rotating shaft 10.

[0033] As Figure 6 shown, the elastic mechanism 21 includes: on one side of the second conveying pipe 4 close to the sliding rod 18, a first fixing plate 22 is fixedly connected. On the top of the first fixing plate 22, a second fixing plate 23 is provided, and the second fixing plate 23 is fixedly connected to the second conveying pipe 4; on the outer surface of the sliding rod 18 close to the first fixing plate 22, a limiting plate 24 is fixedly connected. Between the limiting plate 24 and the second fixing plate 23, a spring 25 is provided. The spring 25 is sleeved on the outer surface of the sliding rod 18. When the user pulls out the device from the soil and releases the pull rod 19 at the same time, the spring 25 generates elastic recovery through the cooperation of the first fixing plate 22 to push the limiting plate 24, and the limiting plate 24 drives the sliding rod 18 to reset, thereby achieving the purpose of closing the movable cone 11 and the fixed cone 8.

[0034] As Figure 2 、 Figure 4 and Figure 8 shown, the linkage mechanism 7 includes: inside the metering tank 3, a matching metering disk 26 is provided. On the top of the metering disk 26, a metering groove 27 is opened. At the center of the circle of the metering disk 26, a fourth rotating shaft 28 is fixedly connected. Both ends of the fourth rotating shaft 28 penetrate through the metering tank 3 and extend to the gears 29. The gears 29 are fixedly connected to the fourth rotating shaft 28, and the fourth rotating shaft 28 is rotatably connected to the metering tank 3; on one side of each of the two gears 29, a rack 30 is engaged. Both ends of the rack 30 are fixedly connected to a connecting rod 31. The ends of the connecting rod 31 far from the rack 30 are fixedly connected to the sliding rod 18. The sliding rod 18 is slidably connected to the metering tank 3. When the sliding rod 18 slides upward, it drives the rack 30 through the connecting rod 31. The rack 30 drives the gear 29 to rotate 180 degrees. While the gear 29 rotates, it drives the fourth rotating shaft 28. The fourth rotating shaft 28 drives the metering disk 26. The metering disk 26 rotates 180 degrees through the cooperation of the metering tank 3, thereby bringing the rapeseed inside the metering groove 27 to the top of the second conveying pipe 4. The rapeseed freely falls inside the second conveying pipe 4 between the fixed cone 8 and the movable cone 11, can open holes in the soil while sowing, and quantitatively control the sowing amount, improving the uniformity of the number of rapeseeds inside the pits, thereby improving the germination rate and survival rate of the rapeseed. The existing adjustable sowing device for rapeseed planting does not have the function of quantitatively sowing seeds, resulting in a too large gap in the number of rapeseeds inside the pits, thus affecting the germination rate and survival rate of the rapeseed.

[0035] As Figure 5 shown, on the top of the storage tank 1, a feeding port 32 is opened. The outer surface of the feeding port 32 is threadedly connected with a sealing cover 33, which facilitates the user to add rapeseed into the storage tank 1.

[0036] As Figure 3As shown in the figure, a pedal 34 is fixedly connected near the semi-circular ring 5 of the second conveying pipe 4. A damping pad 35 is fixedly connected to the top of the pedal 34. The user can apply force to the pedal 34 with the foot, and the pedal 34 drives the second conveying pipe 4, thereby controlling the depth of insertion of the fixed cone 8 and the movable cone 11 into the soil, achieving the purpose of adjusting the seeding depth of rapeseed.

[0037] As Figure 7 shown in the figure, an adjusting plate 36 is provided on the side of the fixed cone 8 away from the movable cone 11. A bolt 37 is provided on the side of the adjusting plate 36 away from the fixed cone 8. One end of the bolt 37 penetrates through the adjusting plate 36 and extends into the interior of the fixed cone 8. The bolt 37 is threadedly connected to the fixed cone 8. A matching travel groove 38 is provided near the adjusting plate 36 close to the fixed cone 8. The user can adjust and fix the height of the adjusting plate 36 on the surface of the fixed cone 8 through the cooperation of the bolt 37 and the travel groove 38. When the fixed cone 8 and the movable cone 11 enter the soil, after the horizontal plane of the adjusting plate 36 contacts the surface of the soil, it can effectively prevent the fixed cone 8 and the movable cone 11 from continuing to move deeper into the soil, thereby achieving the purpose of adjusting the seeding depth.

[0038] Working principle: The user places rapeseed into the interior of the storage tank 1. The rapeseed drops into the metering groove 27 inside the metering plate 26 through the first conveying pipe 2. And the user can adjust and fix the height of the adjusting plate 36 on the surface of the fixed cone 8 through the cooperation of the bolt 37 and the stroke groove 38. Then the user applies force to the pedal 34 with the foot, and the pedal 34 drives the second conveying pipe 4, so that the fixed cone 8 and the movable cone 11 enter the soil. When the fixed cone 8 and the movable cone 11 enter the soil, after the horizontal plane of the adjusting plate 36 touches the surface of the soil, it can effectively prevent the fixed cone 8 and the movable cone 11 from continuing to move into the soil, thereby achieving the purpose of adjusting the sowing depth. Then, the fixed rod 20 is used to pull the pull rod 19, the pull rod 19 drives the sliding rod 18, the sliding rod 18 drives the second fixing block 17, the second fixing block 17 drives the third rotating shaft 16, the third rotating shaft 16 pulls the top end of the linkage rod 15, so that the bottom end of the linkage rod 15 pulls the second rotating shaft 14, the second rotating shaft 14 drives the first fixing block 13, and the first fixing block 13 pulls the movable cone 11, so that the movable cone 11 rotates around the first rotating shaft 10 as the center, achieving the purpose of separating the bottom of the movable cone 11 from the bottom of the fixed cone 8. At the same time, when the sliding rod 18 slides upward, it drives the rack 30 through the connecting rod 31, the rack 30 drives the gear 29 to rotate 180 degrees. While the gear 29 rotates, it drives the fourth rotating shaft 28, the fourth rotating shaft 28 drives the metering plate 26, and the metering plate 26 rotates 180 degrees through the cooperation of the metering box 3, thereby bringing the rapeseed in the metering groove 27 to the top end of the second conveying pipe 4. The rapeseed freely falls inside the second conveying pipe 4 between the fixed cone 8 and the movable cone 11, avoiding too large a difference in the number of rapeseed in the pits, thus affecting the growth of rapeseed. Finally, when the user pulls the device out of the soil and releases the pull rod 19 at the same time, the spring 25 generates elastic recovery through the cooperation of the first fixing plate 22 to push the limiting plate 24, and the limiting plate 24 drives the sliding rod 18 to reset, thereby achieving the purpose of closing the movable cone 11 and the fixed cone 8.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An adjustable sowing device for rapeseed planting, comprising: Storage tank (1); The invention is characterized in that a first delivery pipe (2) is fixedly connected to the bottom of the storage tank (1), a quantitative box (3) is fixedly connected to the bottom end of the first delivery pipe (2), a second delivery pipe (4) is fixedly connected to the bottom of the quantitative box (3), and a semicircular ring (5) is fixedly connected to one side of the bottom of the second delivery pipe (4); The bottom of the semicircular ring (5) is provided with a soil-breaking mechanism (6) for sowing rapeseed deep into the soil; A linkage mechanism (7) for quantitatively sowing rapeseed seeds is arranged inside the quantitative box (3).

2. An adjustable seeding device for rapeseed planting as claimed in claim 1, characterized in that: The ground-breaking mechanism (6) comprises: The bottom of the semicircular ring (5) is fixedly connected to a fixed cone (8), the outer surface of the semicircular ring (5) is fixedly connected to a connecting frame (9), and the side of the connecting frame (9) away from the semicircular ring (5) is fixedly connected to a first rotating shaft (10); The outer surface of the first rotating shaft (10) located inside the connecting frame (9) is rotatably connected with a movable cone (11), and the movable cone (11) cooperates with the fixed cone (8); A sowing mechanism (12) for controlling the movable cone (11) to rotate with the first rotating shaft (10) as the center is provided on a side of the movable cone (11) away from the fixed cone (8).

3. An adjustable seeding device for rapeseed planting as claimed in claim 2, characterized in that: The sowing mechanism (12) comprises: Two first fixed blocks (13) are fixedly connected to one side of the movable cone (11) away from the fixed cone (8); the two first fixed blocks (13) are fixedly connected via a second rotating shaft (14); a linkage rod (15) is rotatably connected to the center of the second rotating shaft (14); a third rotating shaft (16) is rotatably connected to the top of the linkage rod (15); second fixed blocks (17) are fixedly connected to both ends of the third rotating shaft (16); and the two second fixed blocks (17) are fixedly connected to the sliding rod (18); A pull rod (19) is fixedly connected to one side of the top end of the slide rod (18), a fixing rod (20) is provided on the top of the pull rod (19), and the fixing rod (20) is fixedly connected to the first conveying pipe (2); An elastic mechanism (21) for controlling the movable cone (11) to reset is provided on a side of the second conveying pipe (4) close to the sliding rod (18).

4. An adjustable seeding device for rapeseed planting as claimed in claim 3, characterized in that: The elastic mechanism (21) comprises: A first fixing plate (22) is fixedly connected to a side of the second conveying pipe (4) close to the sliding rod (18), a second fixing plate (23) is arranged on the top of the first fixing plate (22), and the second fixing plate (23) is fixedly connected to the second conveying pipe (4); The outer surface of the slide rod (18) near the first fixed plate (22) is fixedly connected to a limit plate (24), and a spring (25) is provided between the limit plate (24) and the second fixed plate (23), and the spring (25) is sleeved on the outer surface of the slide rod (18).

5. The adjustable seeding device for rapeseed planting as claimed in claim 3, characterized in that: The linkage mechanism (7) comprises: A matching quantitative disk (26) is arranged inside the quantitative box (3), a quantitative groove (27) is provided on the top of the quantitative disk (26), a fourth rotating shaft (28) is fixedly connected at the center of the quantitative disk (26), both ends of the fourth rotating shaft (28) pass through the quantitative box (3) and extend to the gear (29), the gear (29) is fixedly connected to the fourth rotating shaft (28), and the fourth rotating shaft (28) is rotatably connected to the quantitative box (3); One side of the two gears (29) is meshed with a rack (30), both ends of the rack (30) are fixedly connected with a connecting rod (31), one end of the connecting rod (31) away from the rack (30) is fixedly connected to the sliding rod (18), and the sliding rod (18) is slidably connected to the quantitative box (3).

6. The adjustable seeding device for rapeseed planting according to claim 1, characterized in that: The top of the material storage tank (1) is provided with a material inlet (32), and the outer surface of the material inlet (32) is threadedly connected with a sealing cover (33).

7. The adjustable seeding device for rapeseed planting according to claim 1, characterized in that: A pedal (34) is fixedly connected to the second delivery pipe (4) near the semicircular ring (5), and a damping pad (35) is fixedly connected to the top of the pedal (34).

8. The adjustable seeding device for rapeseed planting as claimed in claim 2, characterized in that: An adjusting plate (36) is provided on a side of the fixed cone (8) away from the movable cone (11); a bolt (37) is provided on a side of the adjusting plate (36) away from the fixed cone (8); one end of the bolt (37) passes through the adjusting plate (36) and extends into the interior of the fixed cone (8); the bolt (37) is threadedly connected to the fixed cone (8); and a matching travel groove (38) is provided on the adjusting plate (36) near the fixed cone (8).

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