CN204948659U - Compound plough of ploughshare formula and tractor - Google Patents

Abstract

The utility model discloses a conventional compound plow and a tractor. The conventional compound plow includes a frame connected with the tractor, and the bottom of one side of the frame is provided with mopping wheels. Arranged plow assembly, rotary tiller assembly and disc harrow assembly; the three functional components of the plow compound plow, plow assembly, rotary tiller assembly and disc harrow assembly, are arranged obliquely to achieve a good Working effect: not only can complete all the operations before sowing at one time, the effect of straw returning to the field is good, the cost of farmers is less, and it is environmentally friendly, and it is not easy to cause damage to tuber agricultural and sideline products; at the same time, it reduces the power consumed by the rotary tillage operation on the whole machine , which greatly improves the operating efficiency of the whole machine; and its simple structure and reasonable layout reduce the cost of maintenance for customers and bring higher economic benefits to customers.

Description

Conventional compound plow and tractor

technical field

The utility model relates to agricultural farming machinery, in particular to a plow-type compound plow and a tractor.

Background technique

Straw returning to the field is a good strategy to enhance soil fertility, loosen soil, protect the environment, reduce labor intensity and increase production and income. At present, after the straw is returned to the field, the arable machinery is not matched. With the traditional plow, the straw cannot be completely turned into the ground, and the land is patchy, uneven, and the moisture ditch is deep; if the rotary tiller is used to plow the land, due to the broken The effect of the stalk is that the cultivated land is not deep, and the stalk floats on the surface, making it impossible for farmers to sow and irrigate. Moreover, the existing operation method consumes a lot of power and has poor economic benefits. Continuous use of the tiller will cause soil compaction, reduced fertility, and reduced crop production; and two or three separate machines are required for plowing, rotating, and harrowing. Finished separately, power, energy consumption are bigger, the cost of farmers is higher, and not environmental protection.

Utility model content

The purpose of the utility model is to overcome the deficiencies of the prior art, and provide a plow-type compound plow and a tractor that complete all operations before sowing at one time, have good effect of returning straw to the field, and cost less to farmers.

In order to achieve the above object, the technical solution adopted by the utility model is:

The conventional compound plow comprises a frame connected to the tractor, mopping wheels are provided at the bottom of one side of the frame, and a plow assembly, a rotary tiller assembly and a circular cultivator assembly arranged obliquely to the longitudinal direction of the tractor are arranged on the frame. Disk harrow components.

Tractors, including the aforementioned conventional compound plows.

The utility model has the advantages that: the plow compound plow and tractor adopt three functional components such as a plow plow, a rotary tiller and a disc harrow arranged on a frame, and the three functional components are arranged obliquely to each other. Cooperate to achieve a good working effect; not only can complete all the operations before sowing at one time, the effect of straw returning to the field is good, the cost of farmers is less, and it is environmentally friendly, and it is not easy to cause damage to tuber agricultural and sideline products; The power consumption on the machine is reduced, which greatly improves the operating efficiency of the whole machine; and its simple structure and reasonable structure layout reduce the cost of maintenance for customers and bring higher economic benefits to customers.

Description of drawings

The following is a brief description of the contents expressed in the accompanying drawings of the utility model specification and the marks in the figures:

Fig. 1 is the assembly sketch map of the utility model conventional compound plow and tractor.

Fig. 2 is a structural schematic diagram of three components of the conventional compound plow in Fig. 1 .

Fig. 3 is a schematic diagram of the assembly of the plow assembly of the conventional composite plow of the present invention.

Fig. 4 is a schematic diagram of the assembly of the rotary tiller assembly of the conventional compound plow of the present invention.

Fig. 5 is a schematic diagram of the installation of the rotating shaft of the rotary tiller assembly in Fig. 4 .

FIG. 6 is a schematic structural view of the rotary blade of the rotary tiller assembly in FIG. 4 .

Fig. 7 is a schematic diagram of the assembly of the disc harrow assembly of the conventional compound plow of the present invention.

The symbols in the above figures are:

1. Frame, 2. Transmission box, 3. Mopping wheel, 4. Plowshare assembly, 5. Rotary cultivator assembly, 6. Disc harrow assembly, 7. Transmission mechanism, 8. Tractor, 9. Universal Shaft, 10, coulter, 11, coulter frame, 12, U-bolt, 13, mounting frame, 14, rotating shaft, 15, rotary tiller, 16, sprocket, 17, chain, 18, tapered roller bearing, 19, deep groove ball bearing, 20, rotary tillage blade, 21, barb, 22, leaf blade, 23, reinforcing rib, 24, disc harrow, 25, bracket, 26, positioning sleeve, 27, positioning shaft, 28 , bending part, 29, installation step, 30, first spring, 31, second spring, 32, installation sleeve, 33, bolt, 34, compression nut, 35, sub-bracket, 36, guide disc harrow, 37, mounting frame connecting frame, 38, support connecting frame.

detailed description

Below, referring to the accompanying drawings, through the description of the embodiments, the specific implementation of the utility model will be further described in detail, the purpose is to help those skilled in the art to have a more complete, accurate and in-depth understanding of the utility model concept and technical solutions of the utility model understanding and contribute to its implementation.

As shown in Figures 1 and 2, the conventional compound plow includes a frame 1 connected to the tractor 8, and the bottom of one side of the frame 1 is provided with a mopping wheel 3, and the frame 1 is provided with a frame inclined to the longitudinal direction of the tractor 8. The share plow assembly 4, the rotary tiller assembly 5 and the disc harrow assembly 6, the share plow assembly 4, the rotary tiller assembly 5 and the disc harrow assembly 6 are arranged in sequence. The plow-type compound plow adopts three functional components on a frame 1: a plow component 4, a rotary cultivator component 5 and a disc harrow component 6. The three functional components are arranged obliquely to achieve a good Working effect; instead of the assembly of three functional parts in the traditional sense, it can not only complete all the operations before sowing at one time, but also has a good effect of returning straw to the field, less cost for farmers, and is environmentally friendly, and it is not easy to cause damage to tuber agricultural and sideline products; At the same time, it reduces the power consumed by the rotary tillage operation on the whole machine, which greatly improves the operating efficiency of the whole machine; moreover, its simple structure and reasonable structure layout reduce the cost of maintenance for customers and bring customers Higher economic benefits.

As shown in Figure 3, the coulter assembly 4 includes a coulter 10 and a coulter frame 11, and the coulter frame 11 is connected to the frame 1 for installing the coulter 10; the longitudinal direction of the coulter frame 11 and the tractor 8 is greater than 0 degrees Angles less than 90 degrees. The share plow assembly 4 is a mechanical plow, and its main function is to plow the land deeply. The coulter 10 is installed on the coulter frame 11, and the coulter 10 is installed at the front end of the whole compound plow and arranged obliquely; this plow is different from the prior art The biggest difference is that the layout of the plow is no longer a horizontal arrangement parallel to the longitudinal direction of the tractor 8, but an oblique arrangement inclined to the longitudinal direction of the tractor 8. The advantages of such an arrangement structure are: reducing the resistance load during the working process of the machine; compared with the parallel structure, when the front coulter 10 fails to fully plow the land, the rear coulter 10 can have a certain probability to plow the land again , to ensure deep plowing effect.

The coulter 10 is fixed on the coulter frame 11 by a U-bolt 12 . U-shaped bolts 12 are used to install the coulters 10 on the frame 1. The disassembly and assembly of the coulters 10 is simple and convenient. The position of the coulters 10 can be adjusted on the frame 1 according to site requirements. The distance and angle of the coulters 10 Adjusted; to meet arable land needs.

The frame 1 is provided with a transmission box 2 connected to the power output end of the tractor 8; as shown in Figure 4, the rotary tiller assembly 5 includes a mounting frame 13 parallel to the coulter frame 11, and one end of the mounting frame 13 is connected to the frame 1 , the other end of mounting frame 13 is connected with coulter frame 11 by mounting frame connecting frame 37; One end is provided with rotary cultivating knife 15. The main function of the rotary tiller assembly 5 is to crush the plowed land into slag, which is convenient for sowing of crops. The rotary tiller 15 is vertical. Compared with the traditional rotary tiller driven by the horizontal long axis, the rotary tiller assembly 5 can realize deep tillage and deep rotation, and can increase the depth of rotary tillage to twice the former. Since the rotary tiller assembly 5 adopts an oblique arrangement, such a structural arrangement can realize two rounds of rotary tillage on a piece of land, and the rotary tillage effect is better.

The transmission box body 2 realizes one-piece transmission power with low consumption and simple transmission layout, which reduces maintenance costs for customers and brings higher economic benefits to customers. When farming, the frame 1 is connected with the tractor 8 for traction and farming, and the power output end of the tractor 8 is connected with the transmission shaft of the transmission box 2 at the same time, which solves the defect of low power transmission efficiency, improves the operating performance of the machine, and improves the The reliability of the machine, thus increasing the service life of the machine. While the tractor 8 power traction frame 1 advances, it also drives the rotary tiller assembly 5 to rotate, and the soil turned up by the plow assembly 4 is immediately crushed and scattered by the rotary tiller assembly 5, and passed through the disc harrow assembly 6 Leveling the land, realizing the one-time completion of deep plowing, rotary tillage, and leveling harrowing operations. The land worked by the conventional compound plow can be directly planted with crops.

The output shaft power of the transmission case 2 is output to a rotating shaft 14 close to the transmission case 2, and then transmitted to other rotating shafts 14 through the rotating shaft 14, and the transmission is stable in this way. The transmission mechanism 7 comprises a sprocket wheel 16 or a pulley located on the rotating shaft 14, and the output shaft of the transmission case 2 is provided with a sprocket 16 or a pulley; The sprocket 16 on the output shaft of the transmission case 2 is connected by a chain 17, and the sprocket 16 on the adjacent rotating shaft 14 on the frame 1 is connected by a chain 17; or on a rotating shaft 14 close to the transmission case 2 on the frame 1 The belt pulley on the output shaft of the transmission case body 2 is connected by a belt, and the belt pulley on the adjacent rotating shaft 14 on the frame 1 is connected by a belt.

Alternatively, as another power transmission mode, a parallel mode is adopted, and the power of the output shaft of the transmission box 2 is directly output to each rotating shaft 14 . The transmission of the rotary cultivating blade 15 is changed from a serial type to a parallel type, so as to avoid that the whole machine cannot work normally because of a problem in a certain road transmission. Transmission mechanism 7 comprises sprocket wheel 16 or pulley that is located on the rotating shaft 14, is provided with sprocket wheel 16 or pulley on the output shaft of transmission case 2; 16 is connected by chain 17, or the pulley on the rotating shaft 14 and the pulley on the output shaft of transmission case 2 are connected by belt.

The upper end of the rotating shaft 14 is equipped with a sprocket 16 to provide power, and the lower end of the rotating shaft 14 is equipped with a rotary tiller 15 . The rotating speed of rotary tiller 15 can be adjusted according to the size of sprocket 16. When a smaller sprocket 16 is selected, the rotating speed of rotary tiller 15 increases and the crushing effect increases. In actual use, different chains are selected according to the specific conditions of the field. round 16. At the same time, the sprocket 16 can be replaced by a belt pulley. In the process of high-speed operation, the belt transmission is more stable and the transmission efficiency is high, which saves costs and has a low failure rate.

As shown in Fig. 4 and Fig. 5, one end of the sprocket wheel 16 or the pulley on the rotating shaft 14 is provided with a pair of tapered roller bearings 18 and the bearing seat provided on the mounting frame 13 is connected; the rotating shaft 14 is provided with one end of the rotary blade 15 Be provided with deep groove ball bearing 19 and be connected with the established ball bearing bearing seat on the installation frame 13. When the rotary cultivator 15 is installed, what the bearing on the rotating shaft 14 adopted in design is that one end is a pair of tapered roller bearings 18, and a pair of tapered roller bearings 18 are installed face to face, and a point is bidirectionally fixed; the other end is a deep groove ball Bearing 19, a point swims, and deep groove ball bearing 19 can carry out thermal compensation together with rotating shaft 14 in the ball bearing housing. Due to the large working moment of the rotary tiller 15, the design span of the bearing is large and the rotation speed is high, resulting in a large amount of thermal elongation; this installation method is used to provide sufficient axial thermal compensation for the rotating shaft 14, and reserve enough Large thermal compensation space prevents the occurrence of shaft deformation caused by insufficient compensation space; improves the stability of power transmission and work reliability.

As shown in Figure 6, the rotary tiller 15 is composed of a cutter head connected to the rotating shaft 14 and a rotary blade 20 arranged on the cutter head; one end of the rotary blade 20 is connected with the cutter head, and the other end of the rotary blade 20 has an inverted hook 21. The blade portion 22 between the two ends of the rotary tiller blade 20 is a sheet-like structure with a thin edge on one side and a reinforcing rib 23 in the middle. The outer ring of the cutter head is provided with a fixed rotary tiller blade 20, one end of the rotary tiller blade 20 is provided with a barb 21, and the blade portion 22 is in the shape of an arc, with a thin edge on one side and a sheet structure with a reinforcing rib 23 in the middle , The transition between the barb 21 and the blade edge is smooth. When the rotary cultivator assembly 5 rotates, the blade blade portion 22 is relatively thin, which is easier to screw into the soil, providing superior conditions for loosening the soil and plowing and digging tuber agricultural by-products.

Further, the blade edge portion 22 has a circular arc structure; the barb 21 and the blade edge portion 22 have a circular arc transition. Blade portion 22 is arc-shaped, increases the length along the line of screwing into the soil, reduces the time of screwing into the soil per unit time under the same conditions; reduces the need to provide strength, so when rolling soil, the soil will One side is tilted to turn the tuber agricultural products onto the ground; it reduces the failure rate of the whole machine, and the installation form is simple, convenient and in line with ergonomics.

As shown in Fig. 2 and Fig. 7, disc harrow assembly 6 comprises disc harrow 24 and the support 25 that disc harrow 24 is installed, and support 25 is parallel with installation frame 13, and support 25 one end is connected with frame 1, and support 25 other ends The bracket connecting frame 38 is connected to the mounting frame 13, and the disc harrow 24 is connected to the bracket 25 through a flexible mechanism. The disc harrow 24 is a disc-type rolling harrow. The flat harrow itself does not have movement conditions, and the friction between the flat harrow and the ground is used to perform rolling friction on the ground to reduce the resistance of the machine. While doing a straight slide on the ground, the ground that has just been crushed is leveled.

The bracket 25 is provided with a positioning sleeve 26, and the flexible mechanism includes a positioning shaft 27 that is sleeved in the positioning sleeve 26; The disc harrow 24 is contained on the lower end of the positioning shaft 27; the positioning shaft 27 lower end is provided with an installation step 29; A second spring 31 is provided between the bottom of the installation step 29 and the bracket 25 . When the positioning shaft 27 is subjected to external force, it can move in the positioning sleeve 26, and the bending portion 28 enables the positioning shaft 27 to hang on the positioning sleeve 26 after moving. The included angle between the second spring 31 and the first spring 30 is greater than 0 degrees and less than 90 degrees, and the second spring 31 is arranged obliquely. When the disc harrow 24 rolls and encounters an obstacle, squeeze the first spring 30, and the positioning shaft 27 moves upward, or squeeze the second spring 31, and the positioning shaft 27 can move sideways in a small range; Impact, and finally use the restoring force of the spring to achieve reset.

The disc harrow 24 adopts flexible and adjustable technology, and utilizes the elasticity of the first spring 30 and the second spring 31 to realize the flexible and adjustable technology in the working process. When the disc harrow 24 rolls and encounters an obstacle, the disc harrow 24 can either extend outward or retract inward to avoid the impact of the cutting edge and the hard object, and finally utilize the recovery of the first spring 30 and the second spring 31 force to reset. The first spring 30 realizes flexible adjustment up and down, and the second spring 31 realizes flexible left and right adjustment; it can meet the operation requirements of different land agronomy, so that the effect of straw returning to the field in deep plowing operation is good, and the cost of farmers is less.

The lower end of the positioning shaft 27 is provided with a mounting sleeve 32, and the mounting sleeve 32 is provided with bolts 33 extending from the mounting sleeve 32 at both ends, and the two ends of the bolt 33 are fixed on the mounting sleeve 32 by compression nuts 34; The disc harrow 24 is sleeved on the mounting sleeve 32 . The installation method of the disc harrow 24 is not only simple in structure, but also easy to assemble and disassemble.

The mounting sleeve 32 and the disc harrow 24 are connected by cylindrical roller bearings. Since the disc harrow 24 generates an axial force during the process of avoiding obstacles, the use of cylindrical roller bearings can withstand relatively large axial forces to ensure the installation reliability of the disc harrow 24 .

The power input end of the transmission box body 2 is connected with the power output end of the tractor 8 through a cardan shaft 9, that is, the connecting shaft is the cardan shaft 9. The transmission box 2 is a gearbox for power transmission. One end of the cardan shaft 9 is connected to the power output end of the tractor 8, and the other end of the cardan shaft 9 is connected to the power input end of the transmission box 2, so that the power transmission of the tractor 8 is smoothly distributed to the rotary tiller. machine assembly 5.

As shown in Figure 2, support 25 is provided with guide disc harrow assembly near one end of tractor 8, and guide disc harrow assembly comprises sub-support 35 and guide disc harrow 36 parallel with tractor 8 longitudinal direction, guide disc harrow 36 and The sub-supports 35 are connected through flexible supporting mechanisms. When the disc harrow assembly 6 works, the guiding disc harrow assembly acts as a moving guide, reduces the resistance of the machine to advance, and ensures the harrowing effect.

The guide disc harrow 36 has the same structure as the disc harrow 24, and the flexible support structure connecting the guide disc harrow 36 is the same as the flexible support structure connecting the disc harrow 24, referring to accompanying drawing 7. The sub-support 35 is provided with a positioning sleeve 26, and the flexible mechanism includes a positioning shaft 27 that is sleeved in the positioning sleeve 26; The guide disc rake 36 is contained on the lower end of the positioning shaft 27; the positioning shaft 27 lower end is provided with an installation step 29, and the positioning sleeve 26 below on the positioning shaft 27 is provided with the first spring 30 between the installation step 29; the positioning shaft A second spring 31 is arranged between the bottom of the mounting step 29 and the bracket 25 on the top 27 . When the positioning shaft 27 is subjected to external force, it can move in the positioning sleeve 26, and the bending portion 28 enables the positioning shaft 27 to hang on the positioning sleeve 26 after moving. The included angle between the second spring 31 and the first spring 30 is greater than 0 degrees and less than 90 degrees, and the second spring 31 is arranged obliquely. When the guide disc rake 36 rolls and encounters an obstacle, squeeze the first spring 30, and the positioning shaft 27 moves upward; or squeeze the second spring 31, and the positioning shaft 27 can move sideways in a small range; it can avoid cutting edges and hard objects The impact, and finally use the restoring force of the spring to achieve reset.

As a preferred solution, the sub-support 35 and the support 25 are of an integrated structure, and the structural strength between the sub-support 35 and the support 25 is good, which can further ensure the raking effect.

The frame 1 is composed of profiles welded together and is the carrier of the whole machine. Mopping wheels 3 are installed on the lower end of one side of the frame 1. A group of plow assembly 4, a group of rotary tiller assembly 5 and A set of disc harrow components 6, the three components are optimally matched; plows, rotary tillers, and disc-type rolling harrows are arranged in a reasonable position, and the turned soil after the plow operation is directly fed to the entrance of the rotary tiller, so that After the soil is plowed, it will no longer be stacked to affect the effect of the rotary tillage, which improves the performance of the machine; it can be adjusted without adjustment, and can complete the land deep plowing operation, rotary tillage operation, and leveling and harrowing operations at one time, which realizes simple operation and saves time. , energy saving and environmental protection, reducing the cost of farming, and also reducing the driver's operating intensity.

In the plowshare assembly 4, the number of coulters 10 can be set and adjusted according to actual needs. In the schematic diagram of this embodiment, the number of coulters 10 is five, and the plowshare assembly 4 is a five-share plow assembly. In the rotary cultivator assembly 5, the number of rotary cultivators 15 is the same as the number of coulters 10, and a slice of coulters 10 corresponds to one rotary cultivator 15, and the rotary cultivators 15 are arranged at the outlet of the coulters 10; The loads of 15 are roughly equivalent, avoiding the phenomenon that a certain blade skips teeth and the chain 17 breaks when the load is large, thereby avoiding causing complete machine performance to be paralyzed. In the disc harrow assembly 6, the number of disc harrows 24 can be adjusted according to actual needs. In the schematic diagram of this embodiment, the number of disc harrows 24 is nine. Correspondingly, in the guide disc harrow assembly, the number of guide disc harrows 36 can be adjusted according to actual needs. In the schematic diagram of this embodiment, there are two guide disc harrows 36 in the guide disc harrow assembly. After the disc harrow 24 and the guide disc harrow 36 are installed, turn it in multiple directions to avoid its dead point, because the force of the disc harrow 24 is very complicated during the process of raking the ground, and the resulting motion state is also ever-changing so that the disc harrow 24 can meet the usage requirements. The utility model has the advantages of compact structure, convenient operation, easy adjustment, reliable operation and wide adaptability.

Tractors, including the aforementioned conventional compound plows.

The utility model has been exemplarily described above in conjunction with the accompanying drawings. Apparently, the specific implementation of the present invention is not limited by the above methods. As long as the various insubstantial improvements made by adopting the method concept and technical solution of the present utility model; within the scope of protection.

Claims (17)

1. A conventional compound plow, comprising a frame connected to a tractor, the bottom of one side of the frame is provided with mopping wheels, and it is characterized in that: the frame is provided with a conventional plow assembly inclined to the longitudinal arrangement of the tractor , Rotary tiller components and disc harrow components; The coulter assembly includes a coulter and a coulter frame connected to the frame for installing the coulter; the longitudinal angle between the coulter frame and the tractor is greater than 0 degrees and less than 90 degrees; The frame is provided with a transmission box connected to the power output end of the tractor; the rotary cultivator assembly includes a mounting frame parallel to the coulter frame; the mounting frame is provided with a rotating shaft, and one end of the rotating shaft is connected to the The power output end of the transmission box is connected through a transmission mechanism, and the other end of the rotating shaft is provided with a rotary tiller; The disc harrow assembly includes a disc harrow and a bracket parallel to the installation frame, and the disc harrow and the bracket are connected through a flexible mechanism. 2. The conventional compound plow according to claim 1, wherein the coulter is fixed on the coulter frame through U-shaped bolts. 3. The conventional compound plow as claimed in claim 1, characterized in that: the transmission mechanism comprises a sprocket arranged on the rotating shaft, and the output shaft of the transmission box is provided with a sprocket; the rotating shaft The sprocket on the top and the sprocket on the output shaft of the transmission case are connected by a chain. 4. The conventional compound plow as claimed in claim 1, characterized in that: the transmission mechanism comprises a pulley arranged on the rotating shaft, and the output shaft of the transmission box is provided with a pulley; The belt pulley and the belt pulley on the output shaft of the transmission case are connected by a belt. 5. The conventional compound plow as claimed in claim 1, characterized in that: the transmission mechanism includes a sprocket wheel arranged on the rotating shaft, and the output shaft of the transmission box is provided with a sprocket wheel; The sprocket on a rotating shaft close to the transmission case is connected with the sprocket on the output shaft of the transmission case by a chain, and the sprockets on the adjacent rotating shafts on the frame are connected by a chain. 6. The conventional compound plow according to claim 1, characterized in that: the transmission mechanism includes a pulley on the shaft, the output shaft of the transmission box is provided with a pulley; the frame is close to the transmission The belt pulley on a rotating shaft of the casing is connected with the belt pulley on the output shaft of the transmission box body through a belt, and the belt pulleys on the adjacent rotating shafts on the frame are connected through a belt. 7. The mould-type compound plow according to any one of claims 3-6, characterized in that: one end of the rotating shaft provided with a rotary tiller is provided with a deep groove ball bearing and the ball bearing provided on the mounting frame seat; the other end of the rotating shaft is provided with a pair of tapered roller bearings connected with the bearing seat provided on the mounting frame. 8. The conventional compound plow according to any one of claims 3-6, wherein the rotary tiller is composed of a cutter head connected to the rotating shaft and a rotary blade arranged on the cutter head ; One end of the rotary tiller blade is connected to the cutter head, and the other end of the rotary tiller blade has a barb. 9. The mould-type compound plow according to claim 8, characterized in that: the blade between the two ends of the rotary tiller blade is a sheet-like structure with a thin blade on one side and a reinforcing rib in the middle. 10. The conventional compound plow according to claim 9, characterized in that: the blade edge is in a circular arc structure. 11. The conventional compound plow according to claim 9, characterized in that: the barb and the blade edge have a circular arc transition. 12. The conventional compound plow according to any one of claims 3-6, characterized in that: a positioning sleeve is provided on the support, and the flexible mechanism includes a positioning shaft sleeved in the positioning sleeve; The upper end of the positioning shaft is a bending portion located above the positioning sleeve, and the disc rake is mounted on the lower end of the positioning shaft; the lower end of the positioning shaft is provided with an installation step, and the positioning sleeve on the positioning shaft A first spring is arranged between the bottom and the installation step; a second spring is arranged between the bottom of the installation step and the bracket on the positioning shaft. 13. The conventional compound plow according to claim 12, characterized in that: the lower end of the positioning shaft is provided with a mounting sleeve, and the mounting sleeve is provided with bolts at both ends protruding from the mounting sleeve , both ends of the bolt are fixed on the installation sleeve through compression nuts; the disc harrow is set on the installation sleeve. 14. The conventional compound plow according to claim 13, characterized in that: the installation sleeve and the disc harrow are connected by cylindrical roller bearings. 15. The conventional compound plow according to any one of claims 3-6, characterized in that: the power input end of the transmission box and the power output end of the tractor are connected by a cardan shaft. 16. The conventional compound plow according to claim 15, characterized in that: one end of the bracket close to the tractor is provided with a guide disc harrow assembly, and the guide disc harrow assembly includes a subsection parallel to the longitudinal direction of the tractor. A bracket and a guiding disc harrow, the guiding disc harrow is connected with the sub-support through a flexible supporting mechanism. 17. A tractor, characterized by comprising the conventional compound plow according to any one of claims 1-16.