Disc type ditching fertilization device

Abstract

A disc-type trenching and fertilizing device comprises a frame; a frame connecting mechanism connected to the frame; a left shaft sleeve seat of a connecting shaft is provided at the upper end of a wall plate of a pressing wheel connecting arm, a right shaft sleeve seat of a connecting shaft is provided at the upper end of a fertilizer pipe fixed wall plate, and a connecting shaft is arranged between the left and right shaft sleeve seats of the connecting shaft; a vibration absorber, the lower end of which is connected between the lower end of the wall plate of a pressing wheel connecting arm and the upper end of the wall plate of a fertilizer pipe fixed, and the upper end is connected to the frame connecting mechanism; the upper end of the pressing wheel connecting arm is hinged to the pressing wheel connecting arm wall plate, and the lower end extends toward the direction of the pressing wheel, and the pressing wheel is connected to the pressing wheel connecting arm; a trenching disc is connected to the left side of the lower end of the wall plate of a fertilizer pipe fixed; and the fertilizer pipe is fixed to the right side of the wall plate of a fertilizer pipe fixed; and the feature is that it also comprises a trenching disc soil cutting force adjustment mechanism, which is arranged at the middle part of the upper end of the wall plate of a fertilizer pipe fixed and abuts against the upper end of the pressing wheel connecting arm after extending to the left side of the middle part of the upper end of the wall plate of a fertilizer pipe fixed. Reduce maintenance workload and save spare parts costs.

Description

Technical Field

[0001] The invention belongs to the technical field of agricultural machinery, and in particular relates to a disc-type furrowing and fertilizing device. Background Art

[0002] The aforementioned disc-type furrowing and fertilization device is mainly equipped on a traction-type no-till seeder. The advantages of no-till sowing implemented by a no-till seeder are at least the following: First, it saves time. For example, traditional corn sowing requires plowing before sowing, while no-till sowing can save the plowing step; second, it has a strong ability to store water and retain moisture, because the straw harvested from the previous crop can be directly covered, so the water, fertilizer, air and heat of the soil can be supplied in a coordinated manner; third, the seedlings have a good anti-lodging effect, because the traditional sowing method plows the soil layer and destroys the original soil structure, affecting the consolidation of the root system and the soil; fourth, it is conducive to improving the soil structure, because no-till can use the straw return method to increase the soil organic matter content and enhance soil fertility.

[0003] As for the complete set of traction-type no-till planter, a furrowing and fertilizing device is usually arranged at the front of the frame, a seeding device is arranged in the middle, and a soil compacting and covering device is arranged at the rear of the frame.

[0004] Technical information related to the aforementioned no-tillage planter can be found in the published Chinese patent documents, such as CN207678216U recommending "a multifunctional rotary tillage ditching and fertilizing planter", CN209749114U providing "a ditching, fertilizing and sowing integrated device", and CN216218687U introducing "a flat ridge ditching and fertilizing planter", etc. In the structural system of the aforementioned no-tillage planter, the ditching and fertilizing device is a ditching disc (mostly a notched disc) that cuts into the soil and rolls and cuts a ditch in the soil, and a fertilizer pipe (also called a "fertilizer guide pipe") guides the fertilizer, which is usually in the form of particles, into the ditch.

[0005] In the public Chinese patent documents, technical information related to the aforementioned disc-type ditching and fertilizing device can be seen, such as CN211960013U discloses "elastic notched disc fertilizer applicator", CN211671273U announces "single notched disc fertilizer opener", and CN212344462U discloses "no-tillage planter large diameter unit disc fertilizer opener", etc. As is known in the industry, the depth of fertilization ditching can be shallow or deep according to actual conditions. Specifically, the greater the ditching and soil cutting force of the ditching disc such as the aforementioned notched disc, the deeper the depth of the fertilization ditch opened, and vice versa. In addition, according to the different conditions of residual straw and / or weeds on the surface, the cutting force of the ditching disc also needs to be reasonably adjusted accordingly.

[0006] The disc-type trenching and fertilizing devices not limited to the above-mentioned examples each have the technical effects recorded in the technical effect column of their specifications, but have the following common disadvantages: First, since the purpose of adjusting the soil cutting force of the trenching disc to change the depth of the trench is achieved by adjusting the spring, for example, paragraph 0015 of the specification of CN211960013U records: "Because the guide rod is equipped with a limit spring, the fertilization depth is kept stable under the downward pressure of the limit spring"; for example, paragraph 0008 of the specification of CN212344462U teaches: "The pressure spring generates a reaction force applied to the notchless disc, so that the notchless disc cuts off the straw and weeds and the trenching depth meets the requirements"; for example, paragraph 0016 of the specification of CN211671273U describes: "By adjusting the length of the extension of the adjusting screw, the tension of the tension spring is changed to increase or decrease the trenching and soil cutting force of the notch disc." However, the spring is prone to fatigue and it is difficult to exert the desired spring force for a long time, so it cannot meet the actual soil cutting force requirements of the trenching disc, that is, there is a large error, and due to the elastic characteristics of the spring itself, it is often difficult to ensure the accuracy of the soil cutting force adjustment of the trenching disc, and in order to ensure the force of the spring, it is necessary to inspect or even replace it regularly or irregularly, which not only increases the maintenance workload, but also increases the cost of use to a certain extent; secondly, the method of adjusting the soil cutting force of the trenching disc is single, and there are no other auxiliary or alternative measures except relying on the aforementioned spring; thirdly, because the spring that adjusts the soil cutting force of the trenching disc also plays a vibration-proof role to a certain extent, when the trenching disc encounters obstacles such as hard soil debris, it can lift the trenching disc to overcome obstacles, but because the setting position and setting method of the spring are limited, it is not enough to achieve the desired vibration-proof effect on the trenching disc. Based on the above situation, it is necessary to make reasonable improvements, and the technical solution to be introduced below is produced in this context. Summary of the invention

[0007] The primary task of the present invention is to provide a disc-type trenching and fertilizing device that helps to abandon the use of springs and can accurately adjust the soil cutting force of the trenching disc as needed, and will not show abnormal changes after being adjusted to a predetermined position, and can significantly reduce the maintenance workload in daily use and save the cost of spare parts.

[0008] Another task of the present invention is to provide a disc-type trenching and fertilizing device that is conducive to embodying a diversified adjustment method for the soil cutting force of the trenching disc to meet the flexible selection requirements in actual use.

[0009] Another task of the present invention is to provide a disc-type ditching and fertilizing device which is beneficial to embodying an excellent vibration-proofing effect so that the ditching disc can be smoothly lifted up to avoid obstacles when encountering hard impurities in the soil and is convenient for protecting the ditching disc.

[0010] In order to embody the primary task of completing the present invention, the technical solution provided by the present invention is: a disc-type ditching and fertilizing device, comprising a frame; a frame connecting mechanism, the frame connecting mechanism is connected to the frame; a pressure wheel connecting arm wall panel and a fertilizer pipe fixing wall panel, the upper lower part of the pressure wheel connecting arm wall panel and the upper lower part of the fertilizer pipe fixing wall panel are fixedly connected by a connecting beam, a connecting shaft left shaft sleeve seat is fixed at the upper top of the pressure wheel connecting arm wall panel, and a connecting shaft right shaft sleeve seat is fixed at the upper top of the fertilizer pipe fixing wall panel and at a position corresponding to the connecting shaft left shaft sleeve seat, a connecting shaft is rotatably arranged between the left and right shaft sleeve seats of the connecting shaft, the middle part of the connecting shaft is inserted into the frame connecting mechanism; a vibration isolator, the lower end of the vibration isolator is connected between the lower end of the pressure wheel connecting arm wall panel and the upper front end of the fertilizer pipe fixing wall panel, and the upper end of the vibration isolator is connected to the frame connecting mechanism; a pressure wheel connecting arm wall panel An arm and a pressing wheel, the upper end of the pressing wheel connecting arm is hinged to the pressing wheel connecting arm wall plate at a position corresponding to the middle of the right side of the pressing wheel connecting arm wall plate, and the lower end of the pressing wheel connecting arm extends toward the pressing wheel and is provided with a pressing wheel connecting hole, the pressing wheel is located on the right side of the pressing wheel connecting arm and is connected to the pressing wheel connecting arm at a position corresponding to the pressing wheel connecting hole; a ditching plate, which is connected to the left side of the lower end of the fertilizer pipe fixing wall plate at a position corresponding to the right side of the pressing wheel; a fertilizer pipe, which is fixed to the right side of the fertilizer pipe fixing wall plate, and the fertilizer outlet at the lower end of the fertilizer pipe protrudes from the edge of the ditching plate; it is characterized in that it also includes a ditching plate soil cutting force adjustment mechanism, which is arranged in the middle of the upper end of the fertilizer pipe fixing wall plate and abuts against the upper end of the pressing wheel connecting arm after extending to the left side of the middle of the upper end of the fertilizer pipe fixing wall plate.

[0011] In order to embody the completion of another task of the present invention, the technical solution provided by the present invention is: the pressing wheel connecting hole is an elliptical hole; the pressing wheel includes a pressing wheel body, a pressing wheel wheel body support plate and a pressing wheel hub, and a pressing wheel wheel body support seat ring is formed on the inner wall of the pressing wheel wheel body and around the pressing wheel wheel body, and the pressing wheel wheel body support seat ring is fixed to the edge of the pressing wheel wheel body support plate bottom plate of the pressing wheel wheel body support plate through spaced pressing wheel wheel body support seat ring fixing bolts, and the left side surface of the pressing wheel wheel body support plate is supported on the right side of the pressing wheel wheel body support seat ring and the pressing wheel wheel body support plate is located as a whole on the pressing wheel wheel body. The pressing wheel body support disc is in the matching cavity, and the pressing wheel hub is fixed to the center position of the pressing wheel body support disc bottom plate of the pressing wheel body support disc by a group of spaced pressing wheel hub fixing bolts. A hub shaft is provided at the center position of the pressing wheel hub, and the hub shaft passes through the pressing wheel connecting hole and extends to the left side of the pressing wheel connecting arm and is limited by the hub shaft limiting nut screwed on the hub shaft. The pressing wheel body support disc together with the pressing wheel body forms a rotational relationship with the pressing wheel hub by means of the pressing wheel hub bearing; the ditching plate connected to the left side of the fertilizer pipe fixing wall panel corresponds to the right side of the pressing wheel body.

[0012] In order to realize another task of the present invention, the technical solution provided by the present invention is: the vibration absorber corresponds to the upper rear side of the pressing wheel body.

[0013] In a specific embodiment of the present invention, the frame connection mechanism includes a support frame fixing seat connecting clamp, a support frame fixing seat and a support frame, the support frame fixing seat connecting clamp is located in front of the frame and the support frame fixing seat connecting clamp is formed with a frame matching cavity on the side facing backward, the frame matching cavity is matched with the frame, and the frame matching cavity of the frame matching cavity is formed to be open, a clamp upper fixing screw is provided at the upper rear end of the support frame fixing seat connecting clamp, and a clamp lower screw is provided at the lower rear end of the support frame fixing seat connecting clamp The fixing screw, the support frame fixing seat is located at the rear of the frame and corresponds to the support frame fixing seat connecting clamp, the support frame fixing seat is constituted by a support frame fixing seat nut cavity, a clamp upper fixing screw hole is provided at the upper part of the front wall body of the support frame fixing seat, and a clamp lower fixing screw hole is provided at the lower part of the front wall body of the support frame fixing seat, and a support frame fixing seat supporting foot corresponding to each other is respectively constituted on the left side and the right side of the middle part of the front side wall of the support frame fixing seat, a support frame connecting screw hole is provided at the upper part of the rear wall body of the support frame fixing seat, an clamp upper fixing screw locking nut is provided in the support frame fixing seat nut cavity and at the position corresponding to the clamp upper fixing screw hole, a clamp lower fixing screw locking nut is provided at the position corresponding to the clamp lower fixing screw hole, and a support frame connecting screw locking nut is provided at the position corresponding to the support frame connecting screw hole, the clamp upper fixing screw is screwed into the support frame fixing seat nut cavity through the clamp upper fixing screw hole and is locked by the clamp upper fixing screw locking nut, and the clamp lower fixing screw is passed through the clamp lower fixing screw hole The support frame is screwed into the nut cavity of the support frame fixing seat and is locked by the fixing screw locking nut under the clamp, the front side surface of the support frame fixing seat support foot corresponds to the rear side surface of the frame and rests on the rear side surface of the frame, the upper end of the support frame corresponds to the rear side of the rear wall of the support frame fixing seat and is screwed into the nut cavity of the support frame fixing seat by the support frame connecting screw through the support frame connecting screw hole and is locked by the support frame connecting screw locking nut; the middle part of the connecting shaft is inserted into the lower end of the support frame; the upper end of the vibration absorber is connected to the upper end of the support frame.

[0014] In another specific embodiment of the present invention, a semicircular cavity of a left shaft sleeve seat of a connecting shaft is formed at the top of the upper end of the suppressing wheel connecting arm wall panel, and the left shaft sleeve seat of the connecting shaft is welded and fixed to the top of the upper end of the suppressing wheel connecting arm wall panel at a position corresponding to the semicircular cavity of the left shaft sleeve seat of the connecting shaft, and a semicircular cavity of a right shaft sleeve seat of a connecting shaft is formed at the top of the upper end of the fertilizer pipe fixing wall panel and at a position corresponding to the semicircular cavity of the left shaft sleeve seat of the connecting shaft, and the right shaft sleeve seat of the connecting shaft is welded and fixed to the top of the upper end of the fertilizer pipe fixing wall panel at a position corresponding to the semicircular cavity of the right shaft sleeve seat of the connecting shaft; A connecting shaft insertion hole is provided which passes through from the left side to the right side of the supporting frame, the middle part of the connecting shaft is inserted into the lower end of the supporting frame at a position corresponding to the connecting shaft insertion hole, the left end of the connecting shaft protrudes out of the left side surface of the connecting shaft insertion hole and is rotatably arranged on the left shaft sleeve seat of the connecting shaft through the left shaft sleeve of the connecting shaft, a connecting shaft left end oil seal is provided at the end portion of the connecting shaft protruding out of the left side of the connecting shaft left shaft sleeve seat, the right end of the connecting shaft protrudes out of the right side surface of the connecting shaft insertion hole and is rotatably arranged on the right shaft sleeve seat of the connecting shaft through the right shaft sleeve of the connecting shaft, and a connecting shaft right end oil seal is provided at the end portion of the connecting shaft protruding out of the right side surface of the connecting shaft insertion hole.

[0015] In another specific embodiment of the present invention, an oiling nozzle mating hole communicating with the connecting shaft insertion hole is provided on the lower end surface of the support frame and at a position corresponding to the connecting shaft insertion hole, and an oiling nozzle fixing screw hole is provided in the middle of the connecting shaft and at a position corresponding to the oiling nozzle mating hole. The oiling nozzle fixing screw hole passes from one side of the connecting shaft to the other side, and an oiling nozzle is provided at a position corresponding to the oiling nozzle mating hole. The oiling nozzle is screwed into the oiling nozzle fixing screw hole, and a valve type oiling core is provided at the central position of the oiling nozzle.

[0016] In another specific embodiment of the present invention, a suppressing wheel connecting arm limiting axis is formed on the right side of the suppressing wheel connecting arm wall panel and at a position corresponding to the left side of the upper end of the suppressing wheel connecting arm in a state perpendicular to the suppressing wheel connecting arm wall panel, and a suppressing wheel connecting arm wall panel sleeve hole is opened at a position below the middle part of the suppressing wheel connecting arm wall panel, the suppressing wheel connecting arm wall panel sleeve hole passes through from the left side to the right side of the suppressing wheel connecting arm wall panel and a suppressing wheel connecting arm wall panel sleeve is arranged in the suppressing wheel connecting arm wall panel sleeve hole, and a suppressing wheel arm pivot pin is inserted into the suppressing wheel connecting arm wall panel sleeve corresponding to the suppressing wheel connecting arm wall panel sleeve, and the right end of the suppressing wheel arm pivot pin extends to the right side of the suppressing wheel connecting arm wall panel sleeve and And then extends to the right to the pressing wheel connecting arm pivot connection shaft hole opened at the upper end of the pressing wheel connecting arm, a pressing wheel arm pivot connection pin locking screw hole is opened on the pressing wheel connecting arm pivot connection pin and at a position corresponding to the pivot connection shaft hole of the pressing wheel connecting arm, a pressing wheel connecting arm pivot connection pin locking screw hole that communicates with the pressing wheel connecting arm pivot connection shaft hole is opened on the pressing wheel connecting arm and at a position corresponding to the pivot connection shaft hole of the pressing wheel connecting arm, a pressing wheel connecting arm pivot connection pin locking screw is provided at a position corresponding to the pivot connection pin locking screw hole of the pressing wheel connecting arm, and the pressing wheel connecting arm pivot connection pin locking screw is screwed into the pressing wheel arm pivot connection pin locking screw hole.

[0017] In another specific embodiment of the present invention, a left end supporting hole of a lower connecting shaft of a vibration-isolating spring is provided at the lower end of the wall panel of the pressure wheel connecting arm, and a right end supporting hole of a lower connecting shaft of a vibration-isolating spring is provided at the upper end of the wall panel fixing the fertilizer pipe and at a position corresponding to the left end supporting hole of the lower connecting shaft of the vibration-isolating spring; a left supporting hole of an upper connecting shaft of a vibration-isolating spring is provided on the left side wall of the upper end of the supporting frame, and a right supporting hole of an upper connecting shaft of a vibration-isolating spring is provided on the right side wall of the upper end of the supporting frame and at a position corresponding to the left supporting hole of the upper connecting shaft of the vibration-isolating spring; the vibration isolator comprises a lower connecting shaft of a vibration-isolating spring, an upper connecting shaft of a vibration-isolating spring and a vibration-isolating spring, the vibration-isolating spring is connected between an upper connecting seat of the vibration-isolating spring and a lower connecting seat of the vibration-isolating spring, the right end of the lower connecting shaft of the vibration-isolating spring is limited on the right side of the wall panel fixing the fertilizer pipe at a position corresponding to the right end supporting hole of the lower connecting shaft of the vibration-isolating spring, The left end of the lower connecting shaft of the vibration-proof spring passes through the lower connecting shaft hole of the vibration-proof spring connecting seat and the left end supporting hole of the lower connecting shaft of the vibration-proof spring in sequence, and then is screwed on the lower connecting shaft threaded head of the vibration-proof spring connecting shaft at the left end of the lower connecting shaft of the vibration-proof spring to limit the nut. The right end of the upper connecting shaft of the vibration-proof spring is limited by a retaining spring at the position corresponding to the right supporting hole of the upper connecting shaft of the vibration-proof spring by a retaining spring at the right side of the upper right side wall of the supporting frame, and the left end of the upper connecting shaft of the vibration-proof spring passes through the upper connecting shaft hole of the vibration-proof spring connecting seat and the right supporting hole of the upper connecting shaft of the vibration-proof spring in sequence, and is limited by a cotter pin inserted in the left end part of the upper connecting shaft of the vibration-proof spring, and the supporting hole at the left end of the lower connecting shaft of the vibration-proof spring and the supporting hole at the right end of the lower connecting shaft of the vibration-proof spring are elliptical holes; the vibration-proof spring corresponds to the upper rear side of the pressing wheel body.

[0018] In a more specific embodiment of the present invention, a ditching plate hub seat connecting screw shaft hole is provided at the lower end of the fertilizer pipe fixing wall plate, and a fertilizer pipe fixing arm fixing screw hole is provided at the front and rear sides corresponding to the ditching plate hub seat connecting screw shaft hole, a pair of fertilizer pipe fixing arm fixing screws are provided at the positions corresponding to the fertilizer pipe fixing arm fixing screw holes, a fertilizer pipe fixing arm is fixed to the middle part of the fertilizer pipe, and a pair of fertilizer pipe fixing arm screw clearance holes are provided on the fertilizer pipe fixing arm and at the positions corresponding to the fertilizer pipe fixing arm screw holes, the pair of fertilizer pipe fixing arm fixing screws pass through the fertilizer pipe fixing arm screw clearance holes and are screwed in place The fertilizing tube fixing arm fixing screw locking nut at the right end of a pair of fertilizing tube fixing arm fixing screws is locked, and a ditching plate hub seat connecting screw shaft end clearance hole is provided on the fertilizing tube fixing arm and at a position corresponding to the pair of fertilizing tube fixing arm screw clearance holes; a ditching plate center hole is provided at the central position of the ditching plate, and a group of ditching plate hub fixing screw holes are provided around the ditching plate center hole at intervals and pass through the thickness direction of the ditching plate; a ditching plate left hub is provided on the left side of the ditching plate, and a ditching plate right hub is provided on the right side of the ditching plate, and the ditching plate left hub passes through the group of ditching plate hub fixing screws distributed at intervals. The hub fixing screw hole is fixed with a group of right wheel hub fixing screw holes of the ditching plate which are arranged at intervals on the right wheel hub of the ditching plate. A ditching plate hub seat is arranged at the center position of the right wheel hub of the ditching plate through the ditching plate hub bearing. The ditching plate hub seat is fixed with the lower end of the fertilizer pipe fixing wall plate at a position corresponding to the ditching plate hub seat connecting screw shaft through the ditching plate hub seat connecting screw shaft, and the right end of the ditching plate hub seat connecting screw shaft is inserted into the ditching plate hub seat connecting screw shaft end position concession hole; a ditching plate left wheel hub sealing ring embedding groove is arranged on the right side of the left wheel hub of the ditching plate and at a position corresponding to the peripheral edge position of the central hole of the ditching plate, and a sealing ring embedding groove of the left wheel hub of the ditching plate is embedded in the sealing ring embedding groove of the left wheel hub of the ditching plate A left sealing ring is provided, and the left sealing ring is sealed with the peripheral edge of the left side of the center hole of the trenching disk. A right wheel hub sealing ring embedding groove of the trenching disk is provided on the left side of the right wheel hub of the trenching disk and at the position corresponding to the peripheral edge of the center hole of the trenching disk. A right sealing ring is embedded in the right wheel hub sealing ring embedding groove of the trenching disk. The right sealing ring is sealed with the peripheral edge of the right side of the center hole of the trenching disk. The left and right wheel hubs of the trenching disk and the trenching disk are rotatably matched with the trenching disk hub seat through the trenching disk hub bearing. The trenching disk notches are formed at intervals on the disk edge of the trenching disk, and the protrusions between each two adjacent trenching disk notches are formed as trenching disk blade teeth.A corrugated hose is connected to the upper end of the fertilizer pipe through a steel hoop, a hose positioning bracket is fixed to the upper end of the corrugated hose, and the hose positioning bracket is fixed to the hose positioning bracket fixing screw hole provided on the fertilizer pipe fixing wall plate through the hose positioning bracket fixing screw, a fertilizer outlet is formed at the lower end of the fertilizer pipe, and a fertilizer outlet groove is formed at the top, left side and bottom of the fertilizer outlet, and the fertilizer pipe cavity of the fertilizer pipe is communicated with the fertilizer outlet groove. ;

[0019] In a further specific embodiment of the present invention, the upper end of the pressing wheel connecting arm is folded to the left to form a pressing wheel connecting arm actuating rod, an actuating rod actuating block connecting pin shaft hole is opened in the middle of the upper end of the fertilizer pipe fixing wall panel and at a position corresponding to the right end of the actuating rod of the pressing wheel connecting arm, and locking claw holes are opened at intervals in the circumferential direction around the actuating rod actuating block connecting pin shaft hole; the ditching disc soil cutting force adjustment mechanism includes an actuating rod actuating block connecting pin shaft, an adjustment position locking seat, an actuating rod actuating block, an actuating rod actuating block blocking nut and a thrust spring, the actuating rod actuating block connecting pin shaft is arranged on the adjustment position locking seat so as to be movable left and right, and the The left end of the connecting pin of the actuating rod actuating block passes through the connecting pin hole of the actuating rod actuating block and extends to the left side of the fertilizer pipe fixing wall panel. A pin milling plane and an actuating rod actuating block connecting pin threaded head are sequentially formed from right to left at the left end of the connecting pin of the actuating rod actuating block. The right end of the connecting pin of the actuating rod actuating block is inserted into the adjustment position locking seat cavity of the adjustment position locking seat, and a connecting pin rotation adjustment head is formed at the right end of the connecting pin of the actuating rod actuating block. A hexagonal hole is formed at the central position of the right side surface of the connecting pin rotation adjustment head, and a pair of adjustment position locking claws are formed on the left side surface of the adjustment position locking seat. The pair of adjustment position locking claws In cooperation with the locking claw hole, a pair of gripping claws are formed at the right end of the adjustment position locking seat, and the pair of gripping claws correspond to each other up and down, and an eccentric hole of the actuating rod actuating block is opened on the actuating rod actuating block, and a milling plane matching cavity is formed on the right side surface of the actuating rod actuating block and at a position corresponding to the eccentric hole of the actuating block, and the milling plane matching cavity matches with the milling plane of the pin shaft, and the threaded head of the connecting pin shaft of the actuating rod actuating block extends to the left side of the actuating rod actuating block through the eccentric hole of the actuating block, and a group of pressure wheel connecting arm actuating rod actuating rod actuating surfaces are formed on the outer wall in the circumferential direction of the actuating rod actuating block, and the distance from the group of pressure wheel connecting arm actuating rod actuating surfaces to the eccentric hole of the actuating block is They are different from each other, the actuating rod actuating block blocking nut is fixed to the threaded head of the actuating rod actuating block connecting pin shaft at a position on the left side of the actuating rod actuating block, the thrust spring is located in the adjustment position locking seat cavity and is sleeved on the right end of the actuating rod actuating block connecting pin shaft, the left end of the thrust spring is supported on the bottom wall of the adjustment position locking seat cavity, and the right end is supported on the left side surface of the connecting pin shaft rotation adjustment head; the actuating rod actuating block corresponds to the lower surface of the suppressing wheel connecting arm actuating rod, and any suppressing wheel connecting arm actuating rod actuating surface of the group of suppressing wheel connecting arm actuating rod actuating surfaces is in contact with the lower surface of the suppressing wheel connecting arm actuating rod.

[0020] The technical effect of the technical solution provided by the present invention is that since the use of springs is abandoned in the structural system of the soil cutting force adjustment mechanism of the trenching disc, the soil cutting force of the trenching disc can be accurately adjusted as needed and no abnormal changes will occur after being adjusted to a predetermined position, which can significantly reduce the maintenance workload in daily use and save the cost of spare parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is an assembly structure diagram of the present invention.

[0022] Figure 2 for Figure 1 The connection diagram of the support frame of the structural system of the connecting shaft and the frame connecting mechanism is shown.

[0023] Figure 3 for Figure 1 Detailed structural diagram of the fertilizer outlet at the lower end of the fertilizer pipe shown.

[0024] Figure 4 for Figure 1 The detailed structural diagram of the trenching disc soil cutting force adjustment mechanism is shown.

[0025] Figure 5 It is a schematic diagram of the use state of the present invention. DETAILED DESCRIPTION

[0026] In order to more clearly understand the technical essence and beneficial effects of the present invention, the applicant provides a detailed description in the form of embodiments below. However, the description of the embodiments is not a limitation of the present invention. Any equivalent changes made based on the concept of the present invention that are merely formal and not substantial should be regarded as within the scope of the technical solution of the present invention.

[0027] In the following description, all concepts related to up, down, left, right, front and back directions or orientations are based on Figure 1 The position state is taken as an example, and thus it cannot be understood as a special limitation on the technical solution provided by the present invention.

[0028] See also Figure 1, showing a frame 1; showing a frame connecting mechanism 2, which is connected to the aforementioned frame 1; showing a pressing wheel connecting arm wall panel 3 and a fertilizer pipe fixing wall panel 4, the upper lower part of the pressing wheel connecting arm wall panel 3 and the upper lower part of the fertilizer pipe fixing wall panel 4 are fixedly connected by a connecting beam 10 (also called a "connecting beam"), a connecting shaft left shaft sleeve seat 31 is fixed to the upper top of the pressing wheel connecting arm wall panel 3, and a connecting shaft right shaft sleeve seat 41 is fixed to the upper top of the fertilizer pipe fixing wall panel 4 and at a position corresponding to the connecting shaft left shaft sleeve seat 31, a connecting shaft 20 is rotatably arranged between the left and right shaft sleeve seats 31, 41 of the connecting shaft, and the middle part of the connecting shaft 20 is inserted into the aforementioned frame connecting mechanism 2; showing a vibration absorber 5, the lower end of which is connected to the lower end of the pressing wheel connecting arm wall panel 3 and the fertilizer pipe fixing wall panel 4 , and the upper end of the vibration absorber 5 is connected to the aforementioned frame connecting mechanism 2; a suppressing wheel connecting arm 6 and a suppressing wheel 7 are shown, the upper end of the suppressing wheel connecting arm 6 is hinged to the suppressing wheel connecting arm wall panel 3 at a position corresponding to the middle of the right side of the aforementioned suppressing wheel connecting arm wall panel 3, and the lower end of the suppressing wheel connecting arm 6 extends toward the direction of the suppressing wheel 7 and is provided with a suppressing wheel connecting hole 61, the suppressing wheel 7 is located on the right side of the suppressing wheel connecting arm 6 and is connected to the suppressing wheel connecting arm 6 at a position corresponding to the suppressing wheel connecting hole 61; a trenching plate 8 is shown, and the trenching plate 8 is connected to the lower end left side of the aforementioned fertilizer pipe fixing wall panel 4 at a position corresponding to the right side of the aforementioned suppressing wheel 7; a fertilizer pipe 30 is shown, and the fertilizer pipe 30 is fixed to the right side of the aforementioned fertilizer pipe fixing wall panel 4, and the fertilizer outlet 303 at the lower end of the fertilizer pipe 30 protrudes from the plate edge of the trenching plate 8.

[0029] The technical key points of the technical solution provided by the present invention are as follows: the structural system of the aforementioned disc-type trenching and fertilizing device also includes a trenching disc soil cutting force adjustment mechanism 9, which is arranged in the middle of the upper end of the aforementioned fertilizer pipe fixing wall plate 4 and after extending to the left side of the middle of the upper end of the fertilizer pipe fixing wall plate 4, it abuts against the upper end of the aforementioned pressing wheel connecting arm 6.

[0030] See you next time Figure 1The aforementioned pressing wheel connecting hole 61 is an elliptical hole; the aforementioned pressing wheel 7 includes a pressing wheel body 71, a pressing wheel body support plate 72 and a pressing wheel hub 73, and a pressing wheel body support seat ring 711 is formed on the inner wall of the pressing wheel body 71 and around the pressing wheel body 71, and the pressing wheel body support seat ring 711 is fixed to the edge of the pressing wheel body support plate bottom plate 721 of the pressing wheel body support plate 72 by the pressing wheel body support seat ring fixing bolts 7111 distributed at intervals, and the left side surface of the pressing wheel body support plate 72 is supported on the right side of the aforementioned pressing wheel body support seat ring 711 and the pressing wheel body support plate 72 is located as a whole in the pressing wheel body support plate matching cavity 712 of the pressing wheel body 71. Inside, the pressing wheel hub 73 is fixed to the center position of the pressing wheel body support plate bottom plate 721 of the pressing wheel body support plate 72 by a group of spaced pressing wheel hub fixing bolts 731, and a hub shaft 732 is provided at the center position of the pressing wheel hub 73. The hub shaft 732 passes through the aforementioned pressing wheel connecting hole 61 and extends to the left side of the aforementioned pressing wheel connecting arm 6 and is limited by the hub shaft limiting nut 7321 screwed on the hub shaft 732. The aforementioned pressing wheel body support plate 72 together with the aforementioned pressing wheel body 71 forms a rotational relationship with the aforementioned pressing wheel hub 73 by means of the pressing wheel hub bearing; the aforementioned ditching plate 8 connected to the left side of the aforementioned fertilizer pipe fixing wall panel 4 corresponds to the right side of the aforementioned pressing wheel body 71.

[0031] Since the aforementioned pressing wheel connection hole 61 is an elliptical hole, the position of the pressing wheel 7 can be changed accordingly by changing the position of the pressing wheel hub fixing bolt 731 on the pressing wheel connection hole 61, thereby reflecting the diversified adjustment methods of the soil cutting force of the ditching disc described above by the applicant, and meeting the flexible selection requirements in actual use. Specifically, in addition to adjusting the soil cutting force of the ditching disc 8 by means of the ditching disc soil cutting force adjustment mechanism 9, the soil cutting force of the ditching disc 8 can also be adjusted by changing the position of the aforementioned pressing wheel hub fixing bolt 731 on the pressing wheel connection hole 61. The greater the soil cutting force, the deeper the fertilizer trench opened by the ditching disc 8, and vice versa. It can be seen that the functions of the pressing wheel 7 are to press mud (i.e., press soil) and to adjust the depth of the ditching disc 8.

[0032] In this embodiment, the vibration isolator 5 corresponds to the upper rear side of the pressing wheel body 71. Compared with the prior art, this structural design can embody an excellent vibration isolating effect. When the trenching disc 8 encounters hard debris in the soil, it can be smoothly lifted up to avoid obstacles, thereby facilitating the protection of the trenching disc 8.

[0033] Please continue to see Figure 1 Also see Figure 2The frame connection mechanism 2 includes a support frame fixing seat connecting clamp 21, a support frame fixing seat 22 and a support frame 23. The support frame fixing seat connecting clamp 21 is located in front of the frame 1 and the side of the support frame fixing seat connecting clamp 21 facing the rear is formed with a frame matching cavity 211, the frame matching cavity 211 is matched with the frame 1, and the frame matching cavity mouth of the frame matching cavity 211 is formed as an open mouth, and an upper clamp fixing screw 212 is provided at the upper rear end of the support frame fixing seat connecting clamp 21, and a lower clamp fixing screw 213 is provided at the lower rear end of the support frame fixing seat connecting clamp 21, and the support frame fixing seat 22 is located in the front of the frame 1. At the rear of the aforementioned frame 1 and corresponding to the aforementioned support frame fixing seat connection clamp 21, the support frame fixing seat 22 is formed with a support frame fixing seat nut cavity 221, a clamp upper fixing screw hole 222 is opened at the upper part of the front wall body of the support frame fixing seat 22, and a clamp lower fixing screw hole 223 is opened at the lower part of the front wall body of the support frame fixing seat 22, and a support frame fixing seat support foot 224 corresponding to each other is formed on the left side and the right side of the middle part of the front side wall of the support frame fixing seat 22, a support frame connecting screw hole (not shown in the figure) is opened at the upper part of the rear wall body of the support frame fixing seat 22, and the support frame fixing seat nut cavity 221 is formed with a clamp upper fixing screw hole 222 at the upper part of the front wall body of the support frame fixing seat 22. 21 and a clamp upper fixing screw locking nut 2211 is arranged in a position corresponding to the clamp upper fixing screw hole 222, a clamp lower fixing screw locking nut 2212 is arranged in a position corresponding to the clamp lower fixing screw hole 223, and a support frame connecting screw locking nut 2213 is arranged in a position corresponding to the support frame connecting screw hole, the clamp upper fixing screw 212 is screwed into the support frame fixing seat nut cavity 221 through the clamp upper fixing screw hole 222 and is locked by the clamp upper fixing screw locking nut 2211, and the clamp lower fixing screw 213 is screwed into the support frame fixing seat nut cavity 221 through the clamp lower fixing screw hole 223 The support frame 23 is in the nut cavity 221 of the support frame fixing seat and is locked by the fixing screw locking nut 2212 under the aforementioned clamp. The front side surface of the support frame fixing seat support foot 224 corresponds to the rear side surface of the aforementioned frame 1 and rests on the rear side surface of the frame 1. The upper end of the support frame 23 corresponds to the rear side of the rear wall of the aforementioned support frame fixing seat 22 and is screwed into the nut cavity 221 of the support frame fixing seat by the support frame connecting screw 231 through the aforementioned support frame connecting screw hole and then locked by the aforementioned support frame connecting screw locking nut 2213; the middle part of the aforementioned connecting shaft 20 is inserted into the lower end of the aforementioned support frame 23; the upper end of the aforementioned shock absorber 5 is connected to the upper end of the aforementioned support frame 23.

[0034] exist Figure 1 Although a pair of upper fixing screw holes 222 of the clamp and a pair of lower fixing screw holes 223 of the clamp are shown, there is only one upper and lower fixing screw 212, 213 of the clamp, which is designed to select one of the upper and lower fixing screw holes 222, 223 of the clamp as needed.

[0035] Depend on Figure 1 As shown, a connecting shaft left shaft sleeve seat semicircular cavity 32 (also called C-shaped concave cavity) is formed at the upper top of the aforementioned pressing wheel connecting arm wall panel 3, and the aforementioned connecting shaft left shaft sleeve seat 31 is welded and fixed to the upper top of the pressing wheel connecting arm wall panel 3 at a position corresponding to the connecting shaft left shaft sleeve seat semicircular cavity 32, and a connecting shaft right shaft sleeve seat semicircular cavity 42 (also called C-shaped concave cavity) is formed at the upper top of the aforementioned fertilizer pipe fixing wall panel 4 and at a position corresponding to the connecting shaft left shaft sleeve seat semicircular cavity 32, and the aforementioned connecting shaft right shaft sleeve seat 41 is welded and fixed to the upper top of the fertilizer pipe fixing wall panel 4 at a position corresponding to the connecting shaft right shaft sleeve seat semicircular cavity 42; Figure 1 and Figure 2 As shown, a connecting shaft insertion hole 232 is opened at the lower end of the aforementioned supporting frame 23, which passes through from the left side to the right side of the supporting frame 23. The middle part of the aforementioned connecting shaft 20 is inserted into the lower end of the supporting frame 23 at a position corresponding to the connecting shaft insertion hole 232. The left end of the connecting shaft 20 protrudes out of the left side surface of the connecting shaft insertion hole 232 and is rotatably set on the connecting shaft left shaft sleeve seat 31 through the connecting shaft left shaft sleeve 201. A connecting shaft left end oil seal 202 is set at the end of the connecting shaft 20 protruding out of the left side of the connecting shaft left shaft sleeve seat 31. The right end of the connecting shaft 20 protrudes out of the right side surface of the connecting shaft insertion hole 232 and is rotatably set on the connecting shaft right shaft sleeve seat 41 through the connecting shaft right shaft sleeve 203. A connecting shaft right end oil seal 204 is set at the end of the connecting shaft 20 protruding out of the right side of the connecting shaft right shaft sleeve seat 41.

[0036] Depend on Figure 2 As shown, an oiling nozzle mating hole 233 communicating with the connecting shaft insertion hole 232 is provided on the lower end face of the aforementioned support frame 23 and at a position corresponding to the aforementioned connecting shaft insertion hole 232, and an oiling nozzle fixing screw hole 205 is provided in the middle part of the aforementioned connecting shaft 20 and at a position corresponding to the oiling nozzle mating hole 233. The oiling nozzle fixing screw hole 205 passes through from one side of the connecting shaft 20 to the other side, and an oiling nozzle 2331 is provided at a position corresponding to the oiling nozzle mating hole 233. The oiling nozzle 2331 is screwed into the oiling nozzle fixing screw hole 205, and a valve type oiling core 2331 is provided at the central position of the oiling nozzle 2331.

[0037] When lubricating oil is injected into the valve-type oil filling core 23311 which has the effect of a valve core, the lubricating oil spreads through the oil filling nozzle fixing screw hole 205 to between the inner wall of the connecting shaft insertion hole 232 and the outer wall of the connecting shaft 20, thereby achieving good lubrication between the connecting shaft 20 and the connecting shaft insertion hole 232 to ensure the required activity effect of the entire support frame 23.

[0038] See you next time Figure 1On the right side of the aforementioned suppressing wheel connecting arm wall panel 3 and at a position corresponding to the left side of the upper end of the suppressing wheel connecting arm 6, a suppressing wheel connecting arm limiting shaft 33 is formed in a state perpendicular to the suppressing wheel connecting arm wall panel 3, and a suppressing wheel connecting arm wall panel shaft sleeve hole 34 is opened at a position below the middle part of the suppressing wheel connecting arm wall panel 3, and the suppressing wheel connecting arm wall panel shaft sleeve hole 34 passes through from the left side to the right side of the suppressing wheel connecting arm wall panel 3 and a suppressing wheel connecting arm wall panel shaft sleeve 341 is arranged in the suppressing wheel connecting arm wall panel shaft sleeve hole 34, and a suppressing wheel arm pivot connecting pin 3411 is inserted corresponding to the suppressing wheel connecting arm wall panel shaft sleeve 341, and the right end of the suppressing wheel arm pivot connecting pin 3411 extends to the right side of the suppressing wheel connecting arm wall panel shaft sleeve 341 and then extends to the right to open. A suppressing wheel connecting arm pivot connection shaft hole 62 is provided at the upper end of the suppressing wheel connecting arm 6, a suppressing wheel connecting arm pivot connection pin locking screw hole 34111 is provided on the suppressing wheel connecting arm pivot connection pin 3411 and at a position corresponding to the suppressing wheel connecting arm pivot connection shaft hole 62, a suppressing wheel connecting arm pivot connection pin locking screw hole 63 which is communicated with the suppressing wheel connecting arm pivot connection shaft hole 62 is provided on the suppressing wheel connecting arm 6 and at a position corresponding to the suppressing wheel connecting arm pivot connection shaft hole 62, a suppressing wheel connecting arm pivot connection pin locking screw 631 is provided at a position corresponding to the suppressing wheel connecting arm pivot connection pin locking screw hole 63, and the suppressing wheel connecting arm pivot connection pin locking screw 631 is screwed into the aforementioned suppressing wheel arm pivot connection pin locking screw hole 34111.

[0039] Continue to see Figure 1 And combined with Figure 2 A left end supporting hole 35 of the lower connecting shaft of the vibration-isolating spring is provided at the lower end of the aforementioned pressing wheel connecting arm wall panel 3, and a right end supporting hole 43 of the lower connecting shaft of the vibration-isolating spring is provided at the upper end of the aforementioned fertilizer pipe fixing wall panel 4 and at a position corresponding to the left end supporting hole 35 of the lower connecting shaft of the vibration-isolating spring; a left supporting hole 234 of the upper connecting shaft of the vibration-isolating spring is provided on the upper left side wall of the aforementioned supporting frame 23, and a right supporting hole 235 of the upper connecting shaft of the vibration-isolating spring is provided on the upper right side wall of the supporting frame 23 and at a position corresponding to the left supporting hole 234 of the upper connecting shaft of the vibration-isolating spring.

[0040] The aforementioned vibration isolator 5 includes a vibration isolating spring lower connecting shaft 51, a vibration isolating spring upper connecting shaft 52 and a vibration isolating spring 53, the vibration isolating spring 53 is connected between the vibration isolating spring upper connecting seat 531 and the vibration isolating spring lower connecting seat 532, the right end of the vibration isolating spring lower connecting shaft 51 is limited to the right side of the aforementioned fertilizer pipe fixing wallboard 4 at a position corresponding to the aforementioned support hole 43 at the right end of the vibration isolating spring lower connecting shaft, and the left end of the vibration isolating spring lower connecting shaft 51 passes through the vibration isolating spring lower connecting seat connecting shaft hole 5321 of the vibration isolating spring lower connecting seat 532 and the aforementioned support hole 35 at the left end of the vibration isolating spring lower connecting shaft, and then is screwed on the vibration isolating spring lower connecting shaft threaded head 51 at the left end of the vibration isolating spring lower connecting shaft 51 1 is limited by the threaded head of the lower connecting shaft of the vibration-proof spring 5111, the right end of the upper connecting shaft of the vibration-proof spring 52 is limited to the right side of the upper right wall of the aforementioned support frame 23 by the retaining ring 521 at a position corresponding to the right supporting hole 235 of the upper connecting shaft of the vibration-proof spring, and the left end of the upper connecting shaft of the vibration-proof spring 52 passes through the upper connecting shaft hole 5311 of the upper connecting seat 531 of the vibration-proof spring and the right supporting hole 235 of the upper connecting shaft of the vibration-proof spring in sequence, and is then limited by the cotter pin 522 inserted into the left end of the upper connecting shaft of the vibration-proof spring 52, and the left end supporting hole 35 of the lower connecting shaft of the vibration-proof spring and the right end supporting hole 43 of the lower connecting shaft of the vibration-proof spring are elliptical holes; Figure 5 As shown, the aforementioned vibration-isolating spring 53 corresponds to the upper rear side of the aforementioned pressing wheel body 71.

[0041] See you next time Figure 2A ditching plate hub seat connecting screw shaft hole 44 is provided at the lower end of the aforementioned fertilizer pipe fixing wall plate 4, and a fertilizer pipe fixing arm fixing screw hole 45 is provided at the front side and the rear side corresponding to the ditching plate hub seat connecting screw shaft hole 44, and a pair of fertilizer pipe fixing arm fixing screws 451 are provided at the position corresponding to the fertilizer pipe fixing arm fixing screw hole 45, and a fertilizer pipe fixing arm 301 is fixed to the middle part of the aforementioned fertilizer pipe 30, and on the fertilizer pipe fixing arm 301 and at the position corresponding to the fertilizer pipe fixing arm fixing screw hole 45 A pair of fertilizer pipe fixing arm screw clearance holes 3011 are provided, the aforementioned pair of fertilizer pipe fixing arm fixing screws 451 pass through the fertilizer pipe fixing arm screw clearance holes 3011 and are locked by the fertilizer pipe fixing arm fixing screw locking nuts 4511 screwed on the right ends of the pair of fertilizer pipe fixing arm fixing screws 451, and a ditching plate hub seat connecting screw shaft end clearance hole 3012 is provided on the fertilizer pipe fixing arm 301 and at a position corresponding to the pair of fertilizer pipe fixing arm screw clearance holes 3011; at the center position of the aforementioned ditching plate 8 A ditching plate center hole 81 is provided, and a group of ditching plate hub fixing screw holes 82 are provided around the ditching plate center hole 81 and penetrate the thickness direction of the ditching plate 8. A ditching plate left hub 83 is provided on the left side of the ditching plate 8, and a ditching plate right hub 84 is provided on the right side of the ditching plate 8. The ditching plate left hub 83 is connected to the ditching plate right hub fixing screw holes 82 and the ditching plate right hub fixing screw holes 84 provided on the ditching plate right hub 84 through a group of ditching plate left hub fixing screws 831 arranged at intervals. 1 is fixed, a ditching disc hub seat 8421 is provided at the center position of the right ditching disc hub 84 through the ditching disc hub bearing 842, the ditching disc hub seat connecting shaft head 84212 constituting the right side of the ditching disc hub seat 8421 is fixed to the lower end of the fertilizer pipe fixing wall plate 4 at a position corresponding to the aforementioned ditching disc hub seat connecting screw shaft hole 44 through the ditching disc hub seat connecting screw shaft 84211, and the right end of the ditching disc hub seat connecting screw shaft 84211 is inserted into the aforementioned ditching disc hub seat connecting screw shaft end clearance hole 3012;A left hub sealing ring embedding groove 832 of the trenching disc is provided on the right side of the left hub 83 of the trenching disc and at a position corresponding to the peripheral edge portion of the aforementioned trenching disc center hole 81. A left sealing ring 8321 is embedded in the left hub sealing ring embedding groove 832 of the trenching disc. The left sealing ring 8321 is sealed with the peripheral edge portion of the left side of the aforementioned trenching disc center hole 81 of the trenching disc 8. A right hub sealing ring embedding groove (not shown in the figure) of the trenching disc is provided on the left side of the right hub 84 of the trenching disc and at a position corresponding to the peripheral edge portion of the trenching disc center hole 81. A right sealing ring (also not shown in the figure) is embedded in the right hub sealing ring embedding groove of the trenching disc. The right sealing ring is sealed with the peripheral edge portion of the right side of the aforementioned trenching disc center hole 81 of the trenching disc 8. The left and right wheel hubs 83, 84 of the ditching plate and the ditching plate 8 are rotatably matched with the ditching plate hub seat 8421 through the ditching plate hub bearing 842. Ditching plate notches 85 (i.e., concave edges of the ditching plate) are formed at intervals on the ditching plate 8, and the protrusions between two adjacent ditching plate notches 85 are formed as ditching plate teeth 86 (i.e., convex edges of the ditching plate); a corrugated hose 302 is connected to the upper end of the fertilizer pipe 30 through a steel hoop 3021, and a hose positioning bracket 3022 is fixed to the upper end of the corrugated hose 302, and the hose positioning bracket 3022 is fixed to the hose positioning bracket fixing screw hole 46 provided on the fertilizer pipe fixing wall plate 4 through the hose positioning bracket fixing screw 30221. ;

[0042] See also Figure 3 And combined with Figure 1 A fertilizer outlet 303 is formed at the lower end of the fertilizer pipe 30, and a fertilizer outlet groove 3031 is formed at the top, left side and bottom of the fertilizer outlet 303. The fertilizer pipe cavity 304 of the fertilizer pipe 30 is connected to the fertilizer outlet groove 3031. Figure 5 As shown in the diagram, the lower end of the fertilizer outlet 303 slightly protrudes from the lower edge of the furrowing plate 8, and the fertilizer, preferably in granular form, is introduced from the upper part of the corrugated hose 302, passes through the fertilizer tube cavity 304 of the fertilizer tube 30, and is finally led out from the fertilizer outlet groove 3013 to the furrow opened by the furrowing plate 8. In addition, since the furrowing plate 8 has a furrowing plate notch 85 and a furrowing plate blade 86 in a state of being separated from each other, the furrowing plate 8 can be called a single-notch furrowing plate.

[0043] See also Figure 4 And continue to combine Figure 1 , first by Figure 1 As shown, the upper end of the aforementioned pressing wheel connecting arm 6 is folded to the left to form a pressing wheel connecting arm actuating rod 64, and an actuating rod action block connecting pin shaft hole 47 is opened at the middle of the upper end of the aforementioned fertilizer pipe fixing wall plate 4 and at a position corresponding to the right end of the pressing wheel connecting arm actuating rod 64, and locking claw holes 48 are opened at intervals in the circumferential direction around the actuating rod action block connecting pin shaft hole 47; secondly, Figure 4 As shown, the aforementioned ditching disc soil cutting force adjustment mechanism 9 includes an actuating rod action block connecting pin shaft 91, an adjustment position locking seat 92, an actuating rod action block 93, an actuating rod action block blocking nut 94 and a thrust spring 95. The actuating rod action block connecting pin shaft 91 is arranged on the adjustment position locking seat 92 so as to be movable left and right, and the left end of the actuating rod action block connecting pin shaft 91 passes through the aforementioned actuating rod action block connecting pin shaft hole 47 and extends to the left side of the aforementioned fertilizer pipe fixing wall plate 4. At the left end of the actuating rod action block connecting pin shaft 91, a pin shaft milling plane 911 and an actuating rod action block connecting pin shaft threaded head 912 are sequentially formed from right to left. The actuating rod action block connecting pin shaft 91 The right end of the adjusting position locking seat 92 is inserted into the adjusting position locking seat cavity 921 of the adjusting position locking seat 92, and a connecting pin shaft rotating adjustment head 913 is formed at the right end of the actuating rod action block connecting pin shaft 91, and a hexagonal hole 9131 is formed at the central position of the right side surface of the connecting pin shaft rotating adjustment head 913, and a pair of adjusting position locking claws 922 are formed on the left side surface of the adjusting position locking seat 92, and the pair of adjusting position locking claws 922 are matched with the aforementioned locking claw holes 48, and a pair of pinching claws 923 are formed at the right end of the adjusting position locking seat 92, and the pair of pinching claws 923 correspond to each other up and down, and an action block eccentric hole 931 is opened on the actuating rod action block 93, and A milling plane matching cavity 932 is formed on the right side surface of the actuator rod action block 93 and at a position corresponding to the eccentric hole 931 of the action block. The milling plane matching cavity 932 matches with the aforementioned pin shaft milling plane 911. The aforementioned actuator rod action block connecting pin shaft threaded head 912 extends to the left side of the actuator rod action block 93 through the aforementioned action block eccentric hole 931. A group of pressure wheel connecting arm actuator rod action surfaces 933 are formed on the outer wall in the circumferential direction of the actuator rod action block 93. The distance from the group of pressure wheel connecting arm actuator rod action surfaces 933 to the aforementioned action block eccentric hole 931, that is, the size of the eccentricity is different. The actuator rod action block blocking nut 94 is relative to the actuator rod action block 9 3 is fixed to the threaded head 912 of the connecting pin of the actuating rod action block, and the thrust spring 95 is located in the adjusting position locking seat cavity 921 and is sleeved on the right end of the connecting pin 91 of the actuating rod action block. The left end of the thrust spring 95 is supported on the bottom wall of the adjusting position locking seat cavity 921, and the right end is supported on the left side surface of the rotating adjustment head 913 of the connecting pin; the actuating rod action block 93 corresponds to the lower surface of the actuating rod 64 of the suppressing wheel connecting arm, and any one of the actuating rod action surfaces 933 of the actuating rod is in contact with the lower surface of the suppressing wheel connecting arm.

[0044] When the aforementioned adjustment position locking claw 922 is inserted into the corresponding locking claw hole 48, the entire adjustment position locking seat 92 together with the aforementioned actuating rod action block connecting pin 91 are restricted and cannot rotate, that is, they cannot change position. Assuming that at this time the pressing wheel connecting arm actuating rod action surface 933 of the actuating rod action block 93 corresponding to the maximum distance between the aforementioned action block eccentric hole 931 just touches the lower surface of the pressing wheel connecting arm actuating rod 64, then the entire pressing wheel connecting arm 6 will be rotated counterclockwise to the maximum angle, so that the height difference between the pressing wheel 7 and the trenching plate 8 and the bottom plane is reduced, the soil cutting force of the trenching plate 8 becomes relatively smaller, and the opened fertilizer trench is relatively shallow. On the contrary, if through manual operation, for example, with the help of the squeezing claws 923, the pair of adjustment position locking claws 922 are withdrawn (pulled out) from the locking claw holes 48 to the right, and the adjustment position locking seats 92 together with the aforementioned actuating rod action block connecting pin 91 and the actuating rod action block 93 are rotated through an angle so that the pressure wheel connecting arm actuating rod action surface 933 of the actuating rod action block 93 corresponding to the minimum distance between the aforementioned action block eccentric hole 931 is just in contact with the lower surface of the pressure wheel connecting arm actuating rod 64, then relative to the situation where the aforementioned pressure wheel connecting arm 6 is rotated counterclockwise through an angle, the pressure wheel connecting arm 6 will rotate clockwise through an angle, so that the height between the pressure wheel 7 and the ditching plate 8 and the bottom plane is increased, the soil cutting force of the ditching plate 8 becomes relatively larger, and the fertilizer trench opened is relatively deep. After each adjustment is completed, the pair of adjustment position locking claws 922 should be returned to the locking claw holes 48. Since there is a group of pressure wheel connecting arm actuating rod action surfaces 933 in the circumferential direction of the actuating rod action block 93 or in the direction of the peripheral edge of the actuating rod action block 93, the depth of the fertilizer trench opened by the trenching disc 8 can be changed by adjusting in the above manner. As can be seen from the above, since the present invention overcomes the prejudice in the prior art, the method of using springs to adjust the trenching disc soil cutting force size is creatively abandoned in the structural system of the trenching disc soil cutting force size adjustment mechanism 9, thereby reflecting the technical effects recorded by the applicant in the above technical effect column.

[0045] See also Figure 5 , Figure 5 yes Figure 1 In the actual use scenario after assembly, the present invention is towed by a traction device or traction power, and the aforementioned frame 1 can also be used as a carrier. A sowing device and a soil covering device (also called a soil returning device) are arranged behind the aforementioned pressing wheel 7 and the furrowing disc 8 corresponding to the present invention (taking the travel direction of the traction device in the use state as an example) to reflect the integrated effect of furrowing, fertilizing, sowing and covering.

[0046] In summary, the technical solution provided by the present invention makes up for the shortcomings of the existing technology, successfully completes the invention task, and faithfully realizes the technical effects stated by the applicant in the technical effect column above.

Claims

1. A disc-type furrowing fertilizing device, comprising a frame (1); a frame connecting mechanism (2), the frame connecting mechanism (2) being connected to the frame (1); a pressure wheel connecting arm wall plate (3) and a fertilizer pipe fixing wall plate (4), the upper lower part of the pressure wheel connecting arm wall plate (3) and the upper lower part of the fertilizer pipe fixing wall plate (4) being fixedly connected by a connecting beam (10), a connecting shaft left shaft sleeve seat (31) being fixed on the upper top of the pressure wheel connecting arm wall plate (3), and a connecting shaft left shaft sleeve seat (31) being fixed on the fertilizer pipe fixing wall plate (4) A right shaft sleeve seat (41) of the connecting shaft is fixed at the top of the upper end of the fertilizer pipe fixing wall plate (4) and at a position corresponding to the left shaft sleeve seat (31) of the connecting shaft. A connecting shaft (20) is rotatably arranged between the left and right shaft sleeve seats (31, 41) of the connecting shaft. The middle part of the connecting shaft (20) is inserted into the frame connecting mechanism (2); a vibration isolator (5), the lower end of which is connected to the lower end of the pressure wheel connecting arm wall plate (3) and the front end of the upper end of the fertilizer pipe fixing wall plate (4). The upper end of the vibration isolator (5) is connected to the frame connection mechanism (2); a pressure wheel connecting arm (6) and a pressure wheel (7); the upper end of the pressure wheel connecting arm (6) is hinged to the pressure wheel connecting arm wall plate (3) at a position corresponding to the middle of the right side of the pressure wheel connecting arm wall plate (3); the lower end of the pressure wheel connecting arm (6) extends toward the pressure wheel (7) and is provided with a pressure wheel connecting hole (61); the pressure wheel (7) is located on the right side of the pressure wheel connecting arm (6) side and connected to the pressing wheel connecting arm (6) at a position corresponding to the pressing wheel connecting hole (61); a ditching plate (8), which is connected to the left side of the lower end of the fertilizer pipe fixing wall plate (4) at a position corresponding to the right side of the pressing wheel (7); a fertilizer pipe (30), which is fixed to the right side of the fertilizer pipe fixing wall plate (4), and the fertilizer outlet (303) at the lower end of the fertilizer pipe (30) protrudes from the edge of the ditching plate (8); characterized in that The invention also comprises a ditching disc soil cutting force adjustment mechanism (9), which is arranged at the middle part of the upper end of the fertilizer pipe fixing wall plate (4) and abuts against the upper end of the pressure wheel connecting arm (6) after extending to the left side of the middle part of the upper end of the fertilizer pipe fixing wall plate (4); the ditching disc soil cutting force adjustment mechanism (9) comprises an actuating rod action block connecting pin shaft (91), an adjustment position locking seat (92), an actuating rod action block (93), an actuating rod action block blocking nut (94) and a thrust spring (95); the actuating rod action block connecting pin shaft (91) is arranged on the adjustment position locking seat (92) so as to be movable leftward and rightward, and the left end of the actuating rod action block connecting pin shaft (91) passes through the actuating rod action block. The block connecting pin shaft hole (47) extends to the left side of the fertilizer pipe fixing wall plate (4), and a pin shaft milling plane (911) and an actuating rod action block connecting pin shaft threaded head (912) are sequentially formed from right to left at the left end of the actuating rod action block connecting pin shaft (91), and the right end of the actuating rod action block connecting pin shaft (91) is inserted into the adjustment position locking seat cavity (921) of the adjustment position locking seat (92), and a connecting pin shaft rotation adjustment head (913) is formed at the right end of the actuating rod action block connecting pin shaft (91), and a hexagonal hole (9131) is formed at the central position of the right side surface of the connecting pin shaft rotation adjustment head (913), and a pair of adjustment position locking claws (9131) are formed on the left side surface of the adjustment position locking seat (92). 22), the pair of adjustment position locking claws (922) cooperate with the locking claw holes (48), and a pair of gripping claws (923) are formed at the right end of the adjustment position locking seat (92), and the pair of gripping claws (923) correspond to each other up and down, and an eccentric hole (931) of the actuating rod actuating block (93) is provided, and a milling plane matching cavity (932) is formed on the right side surface of the actuating rod actuating block (93) and at a position corresponding to the eccentric hole (931) of the actuating block, and the milling plane matching cavity (932) cooperates with the pin shaft milling plane (911), and the actuating rod actuating block connecting pin shaft thread head (912) extends to the left side of the actuating rod actuating block (93) through the eccentric hole (931) of the actuating block, and the actuating rod actuating block (93) is provided with a milling plane matching cavity (932). 3) is formed on the outer wall in the circumferential direction of the actuator rod of the pressure wheel connecting arm, and the distances from the pressure wheel connecting arm actuator rod acting surfaces (933) to the eccentric hole (931) of the actuating block are different. The actuating rod actuating block blocking nut (94) is fixed to the actuating rod actuating block connecting pin threaded head (912) at the position on the left side of the actuating rod actuating block (93). The thrust spring (95) is located in the adjustment position locking seat cavity (921) and is sleeved on the right end of the actuating rod actuating block connecting pin (91). The left end of the thrust spring (95) is supported on the bottom wall of the adjustment position locking seat cavity (921), and the right end is supported on the left side surface of the connecting pin rotation adjustment head (913).

2. The disc-type trenching and fertilizing device according to claim 1 is characterized in that The suppressing wheel connecting hole (61) is an elliptical hole; the suppressing wheel (7) comprises a suppressing wheel body (71), a suppressing wheel body support plate (72) and a suppressing wheel hub (73); a suppressing wheel body support seat ring (711) is formed on the inner wall of the suppressing wheel body (71) and around the suppressing wheel body (71); the suppressing wheel body support seat ring (711) is fixed to the edge of the suppressing wheel body support plate bottom plate (721) of the suppressing wheel body support plate (72) by means of suppressing wheel body support seat ring fixing bolts (7111) distributed at intervals; the left side surface of the suppressing wheel body support plate (72) is supported on the right side of the suppressing wheel body support seat ring (711) and the suppressing wheel body support plate (72) is located as a whole in the suppressing wheel body support plate matching cavity (712) of the suppressing wheel body (71). The pressing wheel hub (73) is fixed to the center position of the pressing wheel body support plate bottom plate (721) of the pressing wheel body support plate (72) by a group of spaced pressing wheel hub fixing bolts (731). A hub shaft (732) is provided at the center position of the pressing wheel hub (73). The hub shaft (732) passes through the pressing wheel connecting hole (61) and extends to the left side of the pressing wheel connecting arm (6) and is limited by a hub shaft limiting nut (7321) screwed on the hub shaft (732). The pressing wheel body support plate (72) together with the pressing wheel body (71) form a rotational relationship with the pressing wheel hub (73) by means of a pressing wheel hub bearing. The ditching plate (8) connected to the left side of the fertilizer pipe fixing wall plate (4) corresponds to the right side of the pressing wheel body (71).

3. The disc-type trenching and fertilizing device according to claim 2 is characterized in that The vibration isolator (5) corresponds to the upper rear side of the pressing wheel body (71).

4. The disc-type trenching and fertilizing device according to claim 2 is characterized in that The frame connection mechanism (2) comprises a support frame fixing seat connecting clamp (21), a support frame fixing seat (22) and a support frame (23); the support frame fixing seat connecting clamp (21) is located in front of the frame (1) and a frame matching cavity (211) is formed on the rear side of the support frame fixing seat connecting clamp (21); the frame matching cavity (211) matches with the frame (1), and the cavity opening of the frame matching cavity (211) is formed to be open; an upper clamp fixing screw (212) is provided at the upper rear end of the support frame fixing seat connecting clamp (21), and a lower clamp fixing screw (213) is provided at the lower rear end of the support frame fixing seat connecting clamp (21); The fixed seat (22) is located at the rear of the frame (1) and corresponds to the support frame fixing seat connecting clamp (21), the support frame fixing seat (22) is formed with a support frame fixing seat nut cavity (221), an upper clamp fixing screw hole (222) is opened at the upper part of the front wall of the support frame fixing seat (22), and a lower clamp fixing screw hole (223) is opened at the lower part of the front wall of the support frame fixing seat (22), and a support frame fixing seat support foot (224) corresponding to each other is formed on the left side and the right side of the middle part of the front side wall of the support frame fixing seat (22), a support frame connecting screw hole is opened at the upper part of the rear wall of the support frame fixing seat (22), and a support frame fixing seat nut cavity (221) is formed with a support frame connecting screw hole at the upper part of the rear wall of the support frame fixing seat (22). 1) and a clamp upper fixing screw locking nut (2211) is arranged at a position corresponding to the clamp upper fixing screw hole (222), a clamp lower fixing screw locking nut (2212) is arranged at a position corresponding to the clamp lower fixing screw hole (223), and a support frame connecting screw locking nut (2213) is arranged at a position corresponding to the support frame connecting screw hole, the clamp upper fixing screw (212) is screwed into the support frame fixing seat nut cavity (221) through the clamp upper fixing screw hole (222) and is locked by the clamp upper fixing screw locking nut (2211), and the clamp lower fixing screw (213) is screwed into the support frame through the clamp lower fixing screw hole (223) The support frame (23) is fixed to the support frame (221) in the nut cavity (221) of the fixing seat and is locked by the fixing screw locking nut (2212) under the clamp; the front side surface of the support frame fixing seat support foot (224) corresponds to the rear side surface of the frame (1) and abuts against the rear side surface of the frame (1); the upper end of the support frame (23) corresponds to the rear side of the rear wall of the support frame fixing seat (22) and is screwed into the support frame fixing seat nut cavity (221) by the support frame connecting screw (231) through the support frame connecting screw hole and is locked by the support frame connecting screw locking nut (2213); the middle part of the connecting shaft (20) is inserted into the lower end of the support frame (23); and the upper end of the vibration isolator (5) is connected to the upper end of the support frame (23).

5. The disc-type trenching and fertilizing device according to claim 4 is characterized in that A connecting shaft left shaft sleeve seat semicircular cavity (32) is formed at the top of the upper end of the suppressing wheel connecting arm wall panel (3), and the connecting shaft left shaft sleeve seat (31) is welded and fixed to the top of the upper end of the suppressing wheel connecting arm wall panel (3) at a position corresponding to the connecting shaft left shaft sleeve seat semicircular cavity (32); a connecting shaft right shaft sleeve seat semicircular cavity (42) is formed at the top of the upper end of the fertilizer pipe fixing wall panel (4) and at a position corresponding to the connecting shaft left shaft sleeve seat semicircular cavity (32), and the connecting shaft right shaft sleeve seat (41) is welded and fixed to the top of the upper end of the fertilizer pipe fixing wall panel (4) at a position corresponding to the connecting shaft right shaft sleeve seat semicircular cavity (42); a connecting shaft insertion hole (41) is provided at the lower end of the supporting frame (23) and passes through from the left side of the supporting frame (23) to the right side. 232), the middle part of the connecting shaft (20) is inserted into the lower end of the support frame (23) at a position corresponding to the connecting shaft insertion hole (232), the left end of the connecting shaft (20) protrudes out of the left side surface of the connecting shaft insertion hole (232) and is rotatably arranged on the connecting shaft left shaft sleeve seat (31) through the connecting shaft left shaft sleeve (201), a connecting shaft left end oil seal (202) is arranged at the end of the connecting shaft (20) protruding out of the left side of the connecting shaft left shaft sleeve seat (31), the right end of the connecting shaft (20) protrudes out of the right side surface of the connecting shaft insertion hole (232) and is rotatably arranged on the connecting shaft right shaft sleeve seat (41) through the connecting shaft right shaft sleeve (203), and a connecting shaft right end oil seal (204) is arranged at the end of the connecting shaft (20) protruding out of the right side of the connecting shaft right shaft sleeve seat (41).

6. The disc-type trenching and fertilizing device according to claim 5, characterized in that An oiling nozzle matching hole (233) communicating with the connecting shaft insertion hole (232) is provided on the lower end surface of the support frame (23) and at a position corresponding to the connecting shaft insertion hole (232), and an oiling nozzle fixing screw hole (205) is provided in the middle of the connecting shaft (20) and at a position corresponding to the oiling nozzle matching hole (233). The oiling nozzle fixing screw hole (205) passes from one side of the connecting shaft (20) to the other side, and an oiling nozzle (2331) is provided at a position corresponding to the oiling nozzle matching hole (233). The oiling nozzle (2331) is screwed into the oiling nozzle fixing screw hole (205), and a valve type oiling core (23311) is provided at the central position of the oiling nozzle (2331).

7. The disc-type trenching and fertilizing device according to claim 4 is characterized in that A suppressing wheel connecting arm limiting shaft (33) is formed on the right side of the suppressing wheel connecting arm wall panel (3) and at a position corresponding to the left side of the upper end of the suppressing wheel connecting arm (6) in a state perpendicular to the suppressing wheel connecting arm wall panel (3), and a suppressing wheel connecting arm wall panel shaft sleeve hole (34) is opened at a position below the middle part of the suppressing wheel connecting arm wall panel (3), the suppressing wheel connecting arm wall panel shaft sleeve hole (34) passes from the left side to the right side of the suppressing wheel connecting arm wall panel (3) and a suppressing wheel connecting arm wall panel shaft sleeve (341) is arranged in the suppressing wheel connecting arm wall panel shaft sleeve hole (34), a suppressing wheel arm pivot connection pin (3411) is inserted corresponding to the suppressing wheel connecting arm wall panel shaft sleeve (341), the right end of the suppressing wheel arm pivot connection pin (3411) extends to the right side of the suppressing wheel connecting arm wall panel shaft sleeve (341) and then extends to the right to open A suppressing wheel connecting arm pivot connection shaft hole (62) is arranged at the upper end of the suppressing wheel connecting arm (6), a suppressing wheel connecting arm pivot connection pin locking screw hole (34111) is provided on the suppressing wheel connecting arm pivot connection pin (3411) and at a position corresponding to the suppressing wheel connecting arm pivot connection shaft hole (62), a suppressing wheel connecting arm pivot connection pin locking screw hole (63) is provided on the suppressing wheel connecting arm (6) and at a position corresponding to the suppressing wheel connecting arm pivot connection shaft hole (62), a suppressing wheel connecting arm pivot connection pin locking screw hole (631) is provided at a position corresponding to the suppressing wheel connecting arm pivot connection pin locking screw hole (63), and the suppressing wheel connecting arm pivot connection pin locking screw (631) is screwed into the suppressing wheel arm pivot connection pin locking screw hole (34111).

8. The disc-type trenching and fertilizing device according to claim 4 is characterized in that A left end support hole (35) for the lower connecting shaft of the vibration-proof spring is provided at the lower end of the pressure wheel connecting arm wall plate (3), and a right end support hole (43) for the lower connecting shaft of the vibration-proof spring is provided at the upper end of the fertilizer pipe fixing wall plate (4) and at a position corresponding to the left end support hole (35) for the lower connecting shaft of the vibration-proof spring; a left support hole (234) for the upper connecting shaft of the vibration-proof spring is provided on the upper left side wall of the supporting frame (23), and a right end support hole (43) for the upper connecting shaft of the vibration-proof spring is provided on the upper right side wall of the supporting frame (23) and at a position corresponding to the left support hole (234) for the upper connecting shaft of the vibration-proof spring. A right supporting hole (235) of the upper connecting shaft of the vibration-isolating spring is provided; the vibration isolator (5) comprises a lower connecting shaft (51) of the vibration-isolating spring, an upper connecting shaft (52) of the vibration-isolating spring and a vibration-isolating spring (53); the vibration-isolating spring (53) is connected between the upper connecting seat (531) of the vibration-isolating spring and the lower connecting seat (532) of the vibration-isolating spring; the right end of the lower connecting shaft (51) of the vibration-isolating spring is limited to the right side of the fertilizer pipe fixing wall plate (4) at a position corresponding to the right end supporting hole (43) of the lower connecting shaft of the vibration-isolating spring, and the left end of the lower connecting shaft (51) of the vibration-isolating spring is limited to the right side of the fertilizer pipe fixing wall plate (4) at a position corresponding to the right end supporting hole (43) of the lower connecting shaft of the vibration-isolating spring After passing through the lower connecting seat connecting shaft hole (5321) of the lower connecting seat (532) of the vibration-proof spring and the left end supporting hole (35) of the lower connecting shaft of the vibration-proof spring, the lower connecting shaft of the vibration-proof spring is screwed onto the lower connecting shaft thread head (511) of the left end of the lower connecting shaft of the vibration-proof spring (51) and is restricted by the lower connecting shaft thread head limiting nut (5111); the right end of the upper connecting shaft of the vibration-proof spring (52) is restricted to the upper right side wall of the support frame (23) at a position corresponding to the right supporting hole (235) of the upper connecting shaft of the vibration-proof spring by means of a retaining ring (521). The right side of the vibration-isolating spring upper connecting shaft (52), and the left end of the vibration-isolating spring upper connecting shaft (52) passes through the vibration-isolating spring upper connecting shaft hole (5311) of the vibration-isolating spring upper connecting seat (531) and the right supporting hole (235) of the vibration-isolating spring upper connecting shaft in sequence, and is then limited by a cotter pin (522) inserted into the left end of the vibration-isolating spring upper connecting shaft (52), and the left end supporting hole (35) of the vibration-isolating spring lower connecting shaft and the right end supporting hole (43) of the vibration-isolating spring lower connecting shaft are elliptical holes; the vibration-isolating spring (53) corresponds to the upper rear side of the suppressing wheel body (71).

9. The disc-type trenching and fertilizing device according to claim 2, characterized in that A ditching disc hub seat connecting screw shaft hole (44) is provided at the lower end of the fertilizer pipe fixing wall plate (4), and a fertilizer pipe fixing arm fixing screw hole (45) is provided at the front side and the rear side corresponding to the ditching disc hub seat connecting screw shaft hole (44), and a pair of fertilizer pipe fixing arm fixing screws (451) are provided at the positions corresponding to the fertilizer pipe fixing arm fixing screw holes (45), and a fertilizer pipe fixing arm (301) is fixed at the middle part of the fertilizer pipe (30), and a fertilizer pipe fixing arm (301) is fixed at the positions corresponding to the fertilizer pipe fixing arm fixing screw holes (45). A pair of fertilizer pipe fixing arm screw clearance holes (3011) are provided at the position of the fertilizer pipe fixing arm, the pair of fertilizer pipe fixing arm fixing screws (451) pass through the fertilizer pipe fixing arm screw clearance holes (3011) and are locked by the fertilizer pipe fixing arm fixing screw locking nuts (4511) screwed on the right ends of the pair of fertilizer pipe fixing arm fixing screws (451), and a ditching plate hub seat connecting screw shaft end clearance hole (3012) is provided on the fertilizer pipe fixing arm (301) and at a position corresponding to the pair of fertilizer pipe fixing arm screw clearance holes (3011); on the ditching plate ( A ditching disc center hole (81) is provided at the center position of the ditching disc, a group of ditching disc hub fixing screw holes (82) are provided at intervals around the ditching disc center hole (81) and penetrate the thickness direction of the ditching disc (8), a ditching disc left hub (83) is provided on the left side of the ditching disc (8), and a ditching disc right hub (84) is provided on the right side of the ditching disc (8), and the ditching disc left hub (83) is connected to the ditching disc right hub (84) by a group of ditching disc left hub fixing screws (831) distributed at intervals through the group of ditching disc hub fixing screw holes (82) and the ditching disc left hub (84) is connected to the ditching disc left hub (84) A group of right wheel hub fixing screw holes (841) of the ditching disk are fixed on the right wheel hub of the ditching disk, a ditching disk hub seat (8421) is provided at the center position of the right wheel hub (84) of the ditching disk through the ditching disk hub bearing (842), the ditching disk hub seat (8421) is fixed to the lower end of the fertilizer pipe fixing wall plate (4) at a position corresponding to the ditching disk hub seat connecting screw shaft hole (44) through the ditching disk hub seat connecting screw shaft (84211), and the right end of the ditching disk hub seat connecting screw shaft (84211) is inserted into the ditching disk hub seat connecting screw shaft end clearance hole (3012);A left wheel hub sealing ring embedding groove (832) of the ditching disc is provided on the right side of the left wheel hub (83) of the ditching disc and at a position corresponding to the peripheral edge of the central hole (81) of the ditching disc. A left sealing ring (8321) is embedded in the left wheel hub sealing ring embedding groove (832). The left sealing ring (8321) is in sealing cooperation with the peripheral edge of the left side of the central hole (81) of the ditching disc of the ditching disc. A right wheel hub sealing ring embedding groove of the ditching disc is provided on the left side of the right wheel hub (84) of the ditching disc and at a position corresponding to the peripheral edge of the central hole (81) of the ditching disc. A right sealing ring is embedded in the right wheel hub sealing ring embedding groove of the ditching disc. The right sealing ring is in sealing cooperation with the peripheral edge of the right side of the central hole (81) of the ditching disc of the ditching disc. The left and right wheel hubs (83, 84) of the ditching disc and the ditching disc (8) are connected by the ditching disc hub bearing (842). The ditching disc (8) is rotatably matched with the ditching disc hub seat (8421), and ditching disc notches (85) are formed at intervals on the disc edge of the ditching disc (8), and the protrusions between two adjacent ditching disc notches (85) are formed as ditching disc blade teeth (86); a corrugated hose (302) is connected to the upper end of the fertilizer application pipe (30) through a steel hoop (3021), and a hose positioning bracket (3022) is fixed to the upper end of the corrugated hose (302). The positioning bracket (3022) is fixed to the hose positioning bracket fixing screw hole (46) provided on the fertilizer pipe fixing wall plate (4) through the hose positioning bracket fixing screw (30221); a fertilizer outlet (303) is formed at the lower end of the fertilizer pipe (30); a fertilizer outlet groove (3031) is formed at the top, left side and bottom of the fertilizer outlet groove (303); and a fertilizer pipe cavity (304) of the fertilizer pipe (30) is in communication with the fertilizer outlet groove (3031). ; 10. The disc-type trenching and fertilizing device according to claim 1, characterized in that The upper end of the suppressing wheel connecting arm (6) is folded to the left to form a suppressing wheel connecting arm actuating rod (64), and an actuating rod actuating block connecting pin shaft hole (47) is opened in the middle of the upper end of the fertilizer pipe fixing wall panel (4) and at a position corresponding to the right end of the suppressing wheel connecting arm actuating rod (64), and locking claw holes (48) are opened in the circumferential direction around the actuating rod actuating block connecting pin shaft hole (47); the actuating rod actuating block (93) corresponds to the lower surface of the suppressing wheel connecting arm actuating rod (64), and any suppressing wheel connecting arm actuating rod actuating surface in the group of suppressing wheel connecting arm actuating rod actuating surfaces (933) is in contact with the lower surface of the suppressing wheel connecting arm actuating rod (64).

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