A horizontal adjustment device for agricultural rotary tillage blade shaft

Abstract

The invention discloses an agricultural rotary tiller blade shaft horizontal adjustment device, comprising a frame and a rotary tiller blade shaft installed on the frame, wherein the frame is respectively provided with a left fixed plate and a right fixed plate on the left and right sides, a displacement adjustment mechanism is provided on the left fixed plate, a ball joint rotating mechanism is driven and installed on the displacement adjustment mechanism, a displacement compensation mechanism is provided on the right fixed plate, and two ends of the rotary tiller blade shaft are respectively provided and connected in the ball joint rotating mechanism and the displacement compensation mechanism; the displacement adjustment mechanism drives the ball joint rotating mechanism to move in a vertical direction, and then drives the displacement compensation mechanism to move horizontally corresponding to the vertical direction through the rotary tiller blade shaft transmission, thereby adjusting the horizontality of the rotary tiller blade shaft. The invention enables the horizontal adjustment of the rotary tiller to be independent, improves the working quality of the rotary tiller, and also improves the accuracy, adaptability, stability and timeliness of the rotary tiller, thereby laying a foundation for the modular development of intelligent tractors.

Description

Technical Field

[0001] The invention relates to the technical field of agricultural rotary tillers, and in particular to a horizontal adjustment device for an agricultural rotary tiller blade shaft. Background Art

[0002] A rotary tiller is a machine that is used in conjunction with a tractor to complete tillage work. It uses a rotary tiller to cut and reverse the soil. It has been widely used because of its strong ability to break up the soil, make the soil flat and loose after tillage, and increase soil aeration. It can also cut up the stubble and weeds buried below the surface, making it easier for subsequent sowing and conducive to crop growth, and providing a good seed bed for later sowing.

[0003] During tillage, rotary tillers often encounter uneven ground or the tractor tilts due to the soft ground. The usual practice is to manually adjust the three-point suspension according to the ground slope and soil softness before tillage, or manually adjust the hydraulic cylinder to achieve the purpose of leveling the blade shaft. However, adjusting the level of the rotary tiller through three-point suspension is not conducive to the modular development of intelligent agricultural rotary tillers, and the accuracy, adaptability, stability and timeliness of agricultural rotary tillers are low. Therefore, how to invent an agricultural rotary tiller blade shaft horizontal adjustment device to improve these problems and improve the modular development of rotary tillers has become a problem that needs to be solved urgently by technicians in this field. Summary of the invention

[0004] In order to solve the above technical problems existing in the prior art, the present invention proposes an agricultural rotary tillage blade shaft horizontal adjustment device, and its specific technical solution is as follows:

[0005] A device for adjusting the horizontality of an agricultural rotary tiller blade shaft comprises a frame and a rotary tiller blade shaft mounted on the frame, wherein a left fixed plate and a right fixed plate are respectively arranged on the left and right sides of the frame, a displacement adjustment mechanism is arranged and installed on the left fixed plate, a ball joint rotating mechanism is driven and installed on the displacement adjustment mechanism, a displacement compensation mechanism is arranged and installed on the right fixed plate, and two ends of the rotary tiller blade shaft are respectively arranged and connected to the ball joint rotating mechanism and the displacement compensation mechanism; the displacement adjustment mechanism drives the ball joint rotating mechanism to move in a vertical direction, which is then transmitted through the rotary tiller blade shaft to drive the displacement compensation mechanism to perform a horizontal movement corresponding to the vertical direction, thereby adjusting the horizontality of the rotary tiller blade shaft.

[0006] Furthermore, the displacement adjustment mechanism includes: a slide groove, which is fixedly connected to the left fixed plate by bolts, a ball screw is provided at the inner center axis of the slide groove, a slider is arranged on the ball screw, a servo motor is provided outside the slide groove, the output shaft of the servo motor is connected to the end of the ball screw, and the servo motor drives the ball screw to rotate, so that the slider moves on the ball screw.

[0007] Furthermore, symmetrically distributed guide columns are provided on the inner side of the slide groove, and the sliding block cooperates with the guide columns and is driven by a ball screw to move up and down along the direction of the guide columns.

[0008] Furthermore, the ball joint rotation mechanism includes: a spherical shell, a first sphere, a first rotating bearing, and a first cutter shaft flange. The spherical shell is fixedly mounted on the slider, a curved concave cavity is provided in the spherical shell, the first sphere is movably connected in the curved concave cavity, the first rotating bearing is embedded in the first sphere, and the first cutter shaft flange is rotatably connected to the inner diameter surface of the first rotating bearing; a cutter shaft hole is radially opened in the first sphere, and the left end of the rotary tiller cutter shaft is fixedly connected to the first cutter shaft flange through the cutter shaft hole.

[0009] Furthermore, the spherical shell includes: an upper hemispherical shell and a lower hemispherical shell, the lower hemispherical shell is fixedly mounted on the slider, the upper hemispherical shell and the lower hemispherical shell are respectively provided with corresponding curved grooves, the bottom of the curved groove in the upper hemispherical shell is provided with an opening, and the upper hemispherical shell and the lower hemispherical shell are fixedly connected by bolts, and the corresponding curved grooves are combined to form the curved concave cavity.

[0010] Furthermore, the first sphere includes: a first upper hemisphere and a first lower hemisphere, and the first upper hemisphere and the first lower hemisphere are respectively provided with corresponding first connecting through holes and knife shaft holes, and the first connecting through holes are fixedly connected by bolts to limit the first rotating bearing between the first upper hemisphere and the first lower hemisphere, and the size of the knife shaft hole is smaller than the size of the opening.

[0011] Furthermore, the displacement compensation mechanism includes: a flange, an annular shell, a second sphere, a knife shaft connecting shaft, a second rotating bearing, a second knife shaft flange, and a mounting sleeve. The flange is fixedly installed on the right fixed plate, the annular shell is slidably connected to the inner diameter surface of the flange, the inner ring surface of the annular shell is a concave curved surface, the second sphere is limited and movably arranged on the inner ring surface, the second rotating bearing is embedded in the second sphere after being installed in cooperation with the mounting sleeve, and the two sides of the second sphere are respectively provided with interconnected knife shaft through holes and connecting shaft mounting holes, the knife shaft connecting shaft is rotatably connected to the inner diameter surface of the second rotating bearing and its inner end is fixedly connected to the second knife shaft flange, the outer end of the knife shaft connecting shaft extends outward from the connecting shaft mounting hole, and the right end of the rotary tiller knife shaft is fixedly connected to the second knife shaft flange through the knife shaft through hole.

[0012] Furthermore, the second sphere includes: a second upper hemisphere and a second lower hemisphere, the knife shaft through hole is located in the second upper hemisphere, the connecting shaft mounting hole is located in the second lower hemisphere, and a first groove communicating with the knife shaft through hole and a second groove communicating with the connecting shaft mounting hole are respectively provided in the middle of the second upper hemisphere and the middle of the second lower hemisphere, and the first groove corresponds to the second groove, and the second upper hemisphere and the second lower hemisphere are also respectively provided with corresponding second connecting through holes, and the second connecting through holes are fixedly connected by bolts to splice the first groove and the second groove to form a bearing cavity, and the second rotating bearing is embedded in the bearing cavity after being installed in conjunction with the mounting sleeve.

[0013] Furthermore, the outer surface of the body of the knife shaft connecting shaft is installed with a connecting sleeve for axially limiting the knife shaft, and a deep groove ball bearing rotatably connected to the connecting sleeve.

[0014] Furthermore, a first shoulder and a second shoulder are provided on the outer surface of the body of the knife shaft connecting shaft, the outer side surface of the upper end of the connecting sleeve abuts against the lower edge of the connecting shaft mounting hole, and the inner side surface of the lower end abuts against the first shoulder of the knife shaft connecting shaft; the inner diameter surface of the deep groove ball bearing is fixed on the second shoulder of the knife shaft connecting shaft, the outer diameter surface of the deep groove ball bearing is fixedly connected to the inner side surface of the upper end of the connecting sleeve, and an elastic retaining ring is arranged at the connection.

[0015] In the agricultural rotary tiller blade shaft horizontal adjustment device of the present invention, the rotary tiller blade shaft is rotatably mounted on the side fixing plate of the frame in a manner that the horizontality can be adjusted, and a servo motor is used to drive the screw rod to rotate, and the screw rod drives the slider to move up and down, so as to adjust the horizontality of the rotary tiller blade shaft, which can not only improve the overall operation quality and adaptability of the agricultural rotary tiller, but also reduce the dependence of the agricultural rotary tiller on the three-point suspension, and enhance the overall independence of the agricultural rotary tiller; at the same time, the agricultural rotary tiller blade shaft adopts a screw rod to adjust the horizontality, and screw rods with different tooth pitches can be selected to adjust the accuracy of the horizontality, with good adjustment stability and simple structure. In addition, the servo motor is used to drive the screw rod to rotate the number of circles, and its accuracy, adaptability, stability and timeliness are all significantly improved compared with adjusting the blade shaft horizontality through three-point suspension. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the specific structure of a horizontal adjustment device for an agricultural rotary tillage blade shaft according to an embodiment of the present invention;

[0017] Figure 2 is a schematic cross-sectional structural diagram of a ball joint rotating mechanism in a level adjustment device according to an embodiment of the present invention;

[0018] Figure 3 is a schematic cross-sectional structural diagram of a displacement compensation mechanism in a level adjustment device according to an embodiment of the present invention;

[0019] In the figure, 1 is a frame, 2 is a left fixed plate, 3 is a servo motor, 4 is a right fixed plate, 5 is a slide, 601 is a lower hemispherical shell, 602 is a first rotating bearing, 604 is a first connecting through hole, 605 is a first lower hemispherical body, 606 is an upper hemispherical shell, 607 is a first upper hemispherical body, 608 is a knife shaft hole, 7 is a ball screw, 8 is a guide column, 9 is a slider, 10 is a flange, 1001 is a toroidal shell, 1 002 is the second upper hemisphere, 1003 is the elastic retaining ring, 1004 is the deep groove ball bearing, 1005 is the connecting sleeve, 1006 is the second rotating bearing, 1007 is the second lower hemisphere, 1008 is the mounting sleeve, 1009 is the second connecting through hole, 11 is the first blade shaft flange, 12 is the rotary tiller shaft, 13 is the rotary tiller seat, 14 is the rotary tiller, 15 is the blade shaft connecting shaft, and 16 is the second blade shaft flange. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and technical effect of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0021] like Figure 1 As shown, an agricultural rotary tiller blade shaft horizontal adjustment device according to an embodiment of the present invention comprises a frame 1 and a rotary tiller blade shaft 12 mounted on the frame, a plurality of rotary tiller blade seats 13 and rotary tiller blades 14 are arranged on the outer side wall of the rotary tiller blade shaft 12, a left side fixed plate 2 and a right side fixed plate 4 are respectively arranged on the left and right sides of the frame, and is characterized in that a displacement adjustment mechanism is arranged on the left side fixed plate 2, a ball joint rotating mechanism is driven and installed on the displacement adjustment mechanism, a displacement compensation mechanism is arranged on the right side fixed plate 4, and both ends of the rotary tiller blade shaft 12 are respectively arranged and connected in the ball joint rotating mechanism and the displacement compensation mechanism; the displacement adjustment mechanism drives the ball joint rotating mechanism to move in the vertical direction, and then is transmitted through the rotary tiller blade shaft 12 to drive the displacement compensation mechanism to perform horizontal movement corresponding to the vertical direction, thereby adjusting the horizontality of the rotary tiller blade shaft 12.

[0022] Specifically, the displacement adjustment mechanism includes: a slide 5, which is fixedly connected to the left fixed plate 2 by bolts, a ball screw 7 is provided at the inner central axis of the slide 5, and a slider 9 connected to the ball screw 7 is arranged on the ball screw 7, and a servo motor 3 is provided outside the slide 5, and the output shaft of the servo motor 3 is connected to the end of the ball screw 7, and the servo motor 3 drives the ball screw 7 to rotate, so that the slider 9 moves on the ball screw 7. The inner side of the slide 5 is also provided with symmetrically distributed guide columns 8, and the slider 9 is slidably connected with the guide column 8 and driven by the ball screw 7 to move up and down along the direction of the guide column 8, thereby ensuring that the slider 9 moves up and down smoothly and accurately. In addition, the number of turns driven by the servo motor to drive the screw has a much better accuracy, adaptability, stability and timeliness than adjusting the horizontality of the knife shaft through three-point suspension.

[0023] like Figure 2 As shown, the ball joint rotation mechanism includes: a spherical shell, a first sphere, a first rotating bearing 602, and a first blade shaft flange 11. The spherical shell includes: an upper hemispherical shell 606 and a lower hemispherical shell 601. The lower hemispherical shell 601 is fixedly installed on the slider 9. Corresponding curved grooves are respectively provided in the upper hemispherical shell 606 and the lower hemispherical shell 601. The bottom of the curved groove in the upper hemispherical shell 606 is provided with an opening. The upper hemispherical shell 606 and the lower hemispherical shell 601 are fixedly connected by bolts and the corresponding curved grooves are combined to form the curved concave cavity. The first sphere is movably connected in the curved concave cavity. The first rotating bearing 602 is embedded in the first sphere. The first blade shaft flange 11 is rotatably connected to the inner diameter surface of the first rotating bearing 602. The first sphere is radially opened with a blade shaft hole 608. The left end of the rotary tiller blade shaft 12 is fixedly connected to the first blade shaft flange 11 through the blade shaft hole 608.

[0024] The first sphere includes: a first upper hemisphere 607 and a first lower hemisphere 605. The first upper hemisphere 607 and the first lower hemisphere 605 are respectively provided with corresponding first connecting through holes 604 and knife shaft holes 608. After the first connecting through holes 604 are fixedly connected by bolts, the first rotating bearing 602 is limitedly set between the first upper hemisphere 607 and the first lower hemisphere 605. The size of the knife shaft hole 608 is smaller than the size of the opening.

[0025] like Figure 3As shown, the displacement compensation mechanism includes: a flange 10, an annular shell 1001, a second sphere, a knife shaft connecting shaft 15, a second rotating bearing 1006, a second knife shaft flange 16, and a mounting sleeve 1008. The flange 10 is fixedly installed on the right fixed plate 4. The annular shell 1001 is slidably connected to the inner diameter surface of the flange 10. The inner ring surface of the annular shell 1001 is a concave surface. The second sphere is limited and movably arranged on the inner ring surface. The second rotating bearing 1006 is embedded in the second sphere after being installed in coordination with the mounting sleeve 1008. The two sides of the second sphere are respectively provided with interconnected knife shaft through holes and connecting shaft mounting holes. The knife shaft connecting shaft 15 is rotatably connected to the inner diameter surface of the second rotating bearing 1006 and its inner end is fixedly connected to the second knife shaft flange 16. The outer end of the knife shaft connecting shaft 15 is extended outward from the connecting shaft mounting hole. The right end of the rotary tiller knife shaft 12 is fixedly connected to the second knife shaft flange 16 through the knife shaft through hole. Therefore, by setting the annular shell 1001 to be slidably connected to the inner diameter surface of the flange 10, adaptive compensation for lateral displacement can be performed when the rotary tiller shaft 12 is adjusted to be horizontal.

[0026] The second sphere includes: a second upper hemisphere 1002 and a second lower hemisphere 1007. The knife shaft through hole is located in the second upper hemisphere 1002, and the connecting shaft mounting hole is located in the second lower hemisphere 1007. A first groove communicating with the knife shaft through hole and a second groove communicating with the connecting shaft mounting hole are respectively provided in the middle of the second upper hemisphere 1002 and the middle of the second lower hemisphere 1007, and the first groove corresponds to the second groove. The second upper hemisphere 1002 and the second lower hemisphere 1007 are also respectively provided with corresponding second connecting through holes 1009. After the second connecting through holes 1009 are fixedly connected by bolts, the first groove and the second groove are spliced ​​together to form a bearing cavity. The second rotating bearing 1006 is embedded in the bearing cavity after being installed in conjunction with the mounting sleeve 1008.

[0027] The outer surface of the body of the knife shaft connecting shaft 15 is sleeved with a connecting sleeve 1005 for axially limiting the knife shaft connecting shaft 15 , and a deep groove ball bearing 1004 rotatably connected to the connecting sleeve 1005 .

[0028] The outer surface of the body of the blade shaft connecting shaft 15 is provided with a first shoulder and a second shoulder, the outer side surface of the upper end of the connecting sleeve 1005 abuts against the lower edge of the connecting shaft mounting hole, and the inner side surface of the lower end abuts against the first shoulder of the blade shaft connecting shaft 15; the inner diameter surface of the deep groove ball bearing 1004 is fixed on the second shoulder of the blade shaft connecting shaft 15, and the outer diameter surface of the deep groove ball bearing 1004 is fixedly connected to the inner side surface of the upper end of the connecting sleeve 1005, and an elastic retaining ring 1003 is arranged at the connection. In this way, it can be ensured that the blade shaft connecting shaft 15 smoothly drives the rotary tiller blade shaft 12 to rotate when power is input, and the axial displacement of the second rotating bearing 1006 and the blade shaft connecting shaft 15 is effectively limited.

[0029] When in use, the servo motor 3 is turned on to make the ball screw 7 start to rotate, and the slider 9 on the ball screw 7 moves vertically up and down under the restriction of the guide column 8. When the slider 9 moves up and down, it will drive the ball shell in the left ball joint rotating mechanism to be displaced, and the movement of the ball shell will drive the first sphere fixed in its curved concave cavity to move. During the movement, the first sphere will rotate a certain angle in the curved concave cavity, thereby rotating the first rotating bearing 602 embedded in the first sphere and the first knife shaft flange 11 connected to it, thereby rotating the rotary tiller shaft 12 connected to the first knife shaft flange 11, and rotating the rotary tiller shaft 12. The rotary tiller shaft 12 drives the shaft connecting shaft 15 connected to the rotary tiller shaft 12 in the displacement compensation mechanism on the right side to rotate, and the rotation of the shaft connecting shaft 15 drives the second sphere to rotate the same angle inside the annular shell 1001. At the same time, the annular shell 1001 will also be driven by the shaft connecting shaft 15 to cause a lateral displacement with the flange 10, thereby tilting the rotary tiller shaft 12. In this way, the rotary tiller shaft 12 can be adjusted stably, timely and accurately to achieve horizontal adjustment, solving the problem that the existing agricultural rotary tiller does not use the three-point suspension to adjust the horizontal angle of the rotary tiller shaft when operating on uneven ground. The rotary tiller shaft horizontal adjustment device does not need to rely on the three-point suspension to adjust the horizontal angle, so that the rotary tiller has independence in horizontal adjustment. The agricultural rotary tiller shaft horizontal adjustment device improves the working quality of the rotary tiller, and also improves the accuracy, adaptability, stability and timeliness of the rotary tiller, thereby laying a foundation for the modular development of intelligent tractors.

[0030] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly. In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. And, in the description of the present invention, it should be noted that, unless otherwise clearly specified and defined, the terms "installed", "connected", "connected", "a pair", and "a group" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, a mechanical connection, an electrical connection, a direct connection, or an indirect connection through an intermediate medium, or a connection between the two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in specific circumstances. In the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0031] The above is only a preferred implementation case of the present invention and does not limit the present invention in any form. Although the implementation process of the present invention is described in detail above, for those familiar with the art, they can still modify the technical solutions recorded in the above examples, or replace some of the technical features therein with equivalents. All modifications, equivalent replacements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An agricultural rotary tiller blade shaft horizontal adjustment device, comprising a frame (1) and a rotary tiller blade shaft (12) mounted on the frame (1), wherein the frame (1) is provided with a left fixing plate (2) and a right fixing plate (4) on the left and right sides, respectively, and characterized in that: The left fixed plate (2) is provided with a displacement adjustment mechanism, a ball joint rotating mechanism is driven and installed on the displacement adjustment mechanism, a displacement compensation mechanism is provided on the right fixed plate (4), and both ends of the rotary tiller shaft (12) are respectively connected to the ball joint rotating mechanism and the displacement compensation mechanism; the displacement adjustment mechanism drives the ball joint rotating mechanism to move in a vertical direction, which is then driven by the rotary tiller shaft (12) to drive the displacement compensation mechanism to move horizontally corresponding to the vertical direction, thereby adjusting the horizontality of the rotary tiller shaft (12); The displacement adjustment mechanism comprises: a slide groove (5), the slide groove (5) being fixedly connected to the left fixed plate (2) by means of bolts, a ball screw (7) being provided at the center axis inside the slide groove (5), a slider (9) being arranged on the ball screw (7), a servo motor (3) being provided outside the slide groove (5), an output shaft of the servo motor (3) being connected to an end of the ball screw (7), the servo motor (3) driving the ball screw (7) to rotate, so that the slider (9) moves on the ball screw (7); The ball joint rotation mechanism comprises: a ball shell, a first sphere, a first rotating bearing (602), and a first blade shaft flange (11); the ball shell is fixedly mounted on the slider (9); a curved concave cavity is provided in the ball shell; the first sphere is movably connected in the curved concave cavity; the first rotating bearing (602) is embedded in the first sphere; the first blade shaft flange (11) is rotatably connected to the inner diameter surface of the first rotating bearing (602); the first sphere is radially provided with a blade shaft hole (608); the left end of the rotary tiller blade shaft (12) is fixedly connected to the first blade shaft flange (11) via the blade shaft hole (608).

2. The agricultural rotary tiller blade shaft horizontal adjustment device according to claim 1, characterized in that: The inner side of the slide groove (5) is also provided with symmetrically distributed guide columns (8), and the sliding block (9) is slidably connected and cooperates with the guide columns (8) and is driven by the ball screw (7) to move up and down along the direction of the guide columns (8).

3. The agricultural rotary tiller blade shaft horizontal adjustment device according to claim 1, characterized in that: The spherical shell comprises: an upper hemispherical shell (606) and a lower hemispherical shell (601); the lower hemispherical shell (601) is fixedly mounted on the slider (9); corresponding curved grooves are respectively provided in the upper hemispherical shell (606) and the lower hemispherical shell (601); an opening is provided at the bottom of the curved groove in the upper hemispherical shell (606); and the upper hemispherical shell (606) and the lower hemispherical shell (601) are fixedly connected by bolts, and the curved concave cavity is formed by combining the corresponding curved grooves.

4. The agricultural rotary tiller blade shaft horizontal adjustment device according to claim 3, characterized in that: The first sphere comprises: a first upper hemisphere (607) and a first lower hemisphere (605); the first upper hemisphere (607) and the first lower hemisphere (605) are respectively provided with corresponding first connecting through holes (604) and knife shaft holes (608); the first connecting through holes (604) are fixedly connected by bolts to limit the first rotating bearing (602) between the first upper hemisphere (607) and the first lower hemisphere (605); the size of the knife shaft hole (608) is smaller than the size of the opening.

5. The agricultural rotary tillage blade shaft horizontal adjustment device according to claim 1, characterized in that: The displacement compensation mechanism comprises: a flange (10), an annular shell (1001), a second sphere, a knife shaft connecting shaft (15), a second rotating bearing (1006), a second knife shaft flange (16), and a mounting sleeve (1008); the flange (10) is fixedly mounted on the right fixing plate (4); the annular shell (1001) is slidably connected to the inner diameter surface of the flange (10); the inner annular surface of the annular shell (1001) is a concave curved surface; the second sphere is limitably arranged on the inner annular surface; the second rotating shaft The bearing (1006) and the mounting sleeve (1008) are mounted together and embedded in the second sphere. The two sides of the second sphere are respectively provided with interconnected knife shaft through holes and connecting shaft mounting holes. The knife shaft connecting shaft (15) is rotatably connected to the inner diameter surface of the second rotating bearing (1006) and its inner end is fixedly connected to the second knife shaft flange (16). The outer end of the knife shaft connecting shaft (15) extends outward from the connecting shaft mounting hole. The right end of the rotary tiller knife shaft (12) is fixedly connected to the second knife shaft flange (16) through the knife shaft through hole.

6. The agricultural rotary tiller blade shaft horizontal adjustment device according to claim 5, characterized in that: The second sphere comprises: a second upper hemisphere (1002) and a second lower hemisphere (1007); the knife shaft through hole is located in the second upper hemisphere (1002); the connecting shaft mounting hole is located in the second lower hemisphere (1007); a first groove communicating with the knife shaft through hole and a second groove communicating with the connecting shaft mounting hole are respectively provided in the middle of the second upper hemisphere (1002) and the middle of the second lower hemisphere (1007); the first groove corresponds to the second groove; the second upper hemisphere (1002) and the second lower hemisphere (1007) are also respectively provided with corresponding second connecting through holes (1009); the second connecting through holes (1009) are fixedly connected by bolts to combine the first groove and the second groove to form a bearing cavity; the second rotating bearing (1006) is embedded in the bearing cavity after being matched with the mounting sleeve (1008) and installed.

7. The agricultural rotary tiller blade shaft horizontal adjustment device according to claim 5, characterized in that: The outer surface of the body of the knife shaft connecting shaft (15) is provided with a connecting shaft sleeve (1005) for axially limiting the knife shaft connecting shaft (15), and a deep groove ball bearing (1004) rotatably connected to the connecting shaft sleeve (1005).

8. The agricultural rotary tiller blade shaft horizontal adjustment device according to claim 7, characterized in that: A first shoulder and a second shoulder are provided on the outer surface of the body of the knife shaft connecting shaft (15); the outer side surface of the upper end of the connecting sleeve (1005) abuts against the lower edge of the connecting shaft mounting hole, and the inner side surface of the lower end abuts against the first shoulder of the knife shaft connecting shaft (15); the inner diameter surface of the deep groove ball bearing (1004) is fixed on the second shoulder of the knife shaft connecting shaft (15); the outer diameter surface of the deep groove ball bearing (1004) is fixedly connected to the inner side surface of the upper end of the connecting sleeve (1005), and an elastic retaining ring (1003) is arranged at the connection.

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