An adaptive angle rotary tiller

Abstract

The application discloses a self-adaptive angle rotary cultivator and relates to the technical field of agricultural mechanical equipment.The self-adaptive angle rotary cultivator comprises a supporting support, a rotary cultivator frame, a rotary cultivating depth adjusting and positioning mechanism and a rotary cultivating angle adjusting and positioning mechanism, the first end of the rotary cultivating depth adjusting and positioning mechanism is connected with the supporting support, the second end of the rotary cultivating depth adjusting and positioning mechanism is outwardly cantilevered and arranged and is hingedly connected with the rotary cultivator frame, the rotary cultivator frame is driven to swing and be positioned in the height direction through the rotary cultivating depth adjusting and positioning mechanism, the rotary cultivator frame is driven to swing and be positioned forward and backward around the hinged swing axis through the rotary cultivating angle adjusting and positioning mechanism, and the self-adaptive angle rotary cultivator further comprises a transmission coupling mechanism, a gearbox support, a transmission rotating shaft and a box support compensation adjusting and positioning mechanism.The self-adaptive angle rotary cultivator is favorable for guaranteeing that the third coupling part and the second coupling part have a small transmission included angle after the rotary cultivator frame adjusts the working position, and is favorable for improving the transmission efficiency and the service life of the transmission rotating shaft.

Description

Technical Field

[0001] This invention relates to the field of agricultural machinery and equipment technology, and specifically to an adaptive angle rotary tiller. Background Technology

[0002] Rotary tillers, as commonly used agricultural machinery, can chop up stubble buried in the soil, facilitating seeder operations and providing a good seedbed for later sowing. Simultaneously, they improve soil moisture retention, eliminate some weeds, reduce pests and diseases, level the ground, and raise the standards of agricultural mechanization. However, existing rotary tillers have difficulties adjusting the angle of the rotary blade assembly (rotary tiller frame), and the transmission angle of the drive shaft changes significantly when the rotary tiller frame is raised or lowered. Especially when the rotary tiller frame is raised to its highest position, an excessively large transmission angle not only increases noise but also affects service life and transmission efficiency.

[0003] Therefore, it is necessary to propose a rotary tiller with an adaptive angle to solve or at least alleviate the above-mentioned defects. Summary of the Invention

[0004] The main objective of this invention is to provide an adaptive angle rotary tiller, which aims to solve the technical problem of the difficulty in adjusting the angle of the rotary tiller frame during operation of existing rotary tillers.

[0005] To achieve the above objectives, the present invention provides an adaptive-angle rotary tiller, including a support frame, a rotary tiller frame, a rotary tillage depth adjustment and positioning mechanism, and a rotary tillage tilt angle adjustment and positioning mechanism. The first end of the rotary tillage depth adjustment and positioning mechanism is connected to the support frame, and the second end of the rotary tillage depth adjustment and positioning mechanism is cantilevered outward and hinged to the rotary tiller frame. A hinged swing axis exists between the rotary tillage depth adjustment and positioning mechanism and the rotary tiller frame. The first end of the rotary tillage tilt angle adjustment and positioning mechanism is connected to the support frame, and the second end of the rotary tillage tilt angle adjustment and positioning mechanism extends outward and is hinged to the rotary tiller frame. The support frame, rotary tillage depth adjustment and positioning mechanism, rotary tillage tilt angle adjustment and positioning mechanism, and rotary tiller frame are combined to form a four-bar linkage mechanism, which, through rotary tillage... The depth adjustment positioning mechanism drives the rotary tiller frame to swing and position itself in the height direction. The rotary tiller tilt angle adjustment positioning mechanism drives the rotary tiller frame to swing back and forth around the hinged swing axis and position itself. The adaptive angle rotary tiller also includes a transmission coupling mechanism, a gearbox support, a transmission shaft, and a gearbox support compensation adjustment positioning mechanism. The gearbox support is rotatably mounted on the rotary tiller frame. The transmission shaft is rotatably mounted inside the gearbox support. The transmission coupling mechanism is arranged intersecting with the transmission shaft and is rotatably supported on the gearbox support. The output end of the transmission coupling mechanism extends into the gearbox support and is connected to the input end of the transmission shaft. The gearbox support compensation adjustment positioning mechanism is used to drive the gearbox support to rotate and position itself around the central axis.

[0006] Furthermore, the gearbox support includes support bushings and a support housing. Two support bushings are arranged opposite each other on both sides of the support housing and are fixedly connected to the support housing. The transmission shaft is arranged in a one-to-one correspondence with the support bushings. The transmission shaft is located inside the support bushing and is rotatably arranged relative to the support bushing. The input end of the transmission shaft extends into the support housing. The transmission coupling mechanism is rotatably arranged relative to the support housing, and the output end of the transmission coupling mechanism extends into the support housing and is connected to the transmission shaft.

[0007] Furthermore, the adaptive angle rotary tiller also includes a bushing support and a bearing support. Bushing supports are provided at both ends of the rotary tiller frame. The outer ring of the bushing support is positioned and assembled at the end of the rotary tiller frame. A support bushing is assembled on the inner ring of the bushing support. The bearing support is located inside the support bushing. The outer ring of the bearing support is positioned and assembled inside the support bushing. A transmission shaft is assembled on the inner ring of the bearing support.

[0008] Furthermore, the transmission coupling mechanism includes a first coupling, a second coupling, a third coupling, and a coupling output rod. The first end of the second coupling is hinged to the first coupling and is laterally swayable relative to the first coupling. The second end of the second coupling is hinged to the first end of the third coupling and is vertically swayable relative to the third coupling. The first end of the coupling output rod is circumferentially limited to the second end of the third coupling. The second end of the coupling output rod is rotatably supported on the support housing and extends into the support housing.

[0009] Furthermore, the third coupling and the coupling output rod are connected by a spline connection.

[0010] Furthermore, the gearbox support compensation and adjustment positioning mechanism includes a compensation and adjustment linear drive positioning cylinder, which is hinged between the support box and the support bracket. The compensation and adjustment linear drive positioning cylinder drives the gearbox support to rotate around the central axis, causing the coupling output rod to drive the third coupling to swing and adjust the included angle between the third coupling and the second coupling.

[0011] Furthermore, the rotary tillage depth adjustment and positioning mechanism includes a first swing arm, a swing connecting rod, and a second swing arm. The first and second swing arms are respectively hinged on the support bracket, with the first swing arm positioned above the second swing arm. The swing connecting rod is located on one side of the support bracket, with both ends hinged to the first and second swing arms respectively. The first swing arm, the second swing arm, and the swing connecting rod on the support bracket form a quadrilateral connection mechanism. The second swing arm is cantilevered outward and hinged to the rotary tiller frame. The mechanism also includes a lifting adjustment linear drive positioning cylinder, which is hinged between the first swing arm and the support bracket. The lifting adjustment linear drive positioning cylinder drives the first swing arm to swing, causing the cantilevered end of the second swing arm to swing vertically.

[0012] Furthermore, quadrilateral connecting mechanisms are provided on both sides of the support bracket, and the lifting adjustment linear drive positioning cylinder is arranged in a one-to-one correspondence with the quadrilateral connecting mechanisms.

[0013] Furthermore, the rotary tillage depth adjustment and positioning mechanism also includes a left-right swing adjustment linear drive positioning cylinder. The first swing rod is ball-connected to the support bracket, and the second swing rod is ball-connected to the support bracket. The left-right swing adjustment linear drive positioning cylinder is arranged in a one-to-one correspondence with the second swing rod. The left-right swing adjustment linear drive positioning cylinder is hinged between the second swing rod and the support bracket. The left-right swing adjustment linear drive positioning cylinder drives the quadrilateral connecting mechanism to swing left and right and position itself.

[0014] Furthermore, the rotary tillage tilt angle adjustment and positioning mechanism includes a three-point suspension and a front and rear swing adjustment linear drive positioning cylinder. The first end of the front and rear swing adjustment linear drive positioning cylinder is hinged to the top of the three-point suspension, and the three radiating ends of the three-point suspension are respectively hinged to the rotary tiller frame. The front and rear swing adjustment linear drive positioning cylinder drives the rotary tiller frame to swing around the hinged swing axis and position itself.

[0015] Compared with the prior art, the adaptive angle rotary tiller provided by the present invention has the following beneficial effects:

[0016] The adaptive-angle rotary tiller provided by this invention includes a support bracket, a rotary tiller frame, a rotary tillage depth adjustment and positioning mechanism, and a rotary tillage tilt angle adjustment and positioning mechanism. The support bracket, rotary tillage depth adjustment and positioning mechanism, rotary tillage tilt angle adjustment and positioning mechanism, and rotary tiller frame are combined to form a four-bar linkage. The rotary tiller frame is suspended behind the support bracket under the action of the rotary tillage depth adjustment and positioning mechanism and the rotary tillage tilt angle adjustment and positioning mechanism. The rotary tillage depth adjustment and positioning mechanism drives the rotary tiller frame to swing back and forth around the hinged swing axis and to be positioned, which can adjust the rotary tillage depth and the rotary tillage tilt angle of the rotary tiller frame. The adaptive-angle rotary tiller also includes a transmission coupling mechanism, a gearbox support, a transmission shaft, and a gearbox support compensation and adjustment positioning mechanism. When the rotary tiller frame is raised, lowered, or laterally swung, the gearbox support compensation and adjustment positioning mechanism extends and retracts, causing the gearbox support to swing around the mounting axis. Under the condition that the cooperation relationship between the transmission shaft and the transmission coupling mechanism remains unchanged, it is beneficial to reduce the transmission angle of the transmission coupling mechanism, which is beneficial to improve transmission efficiency and the service life of the transmission shaft. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0018] Figure 1 This is a three-dimensional structural diagram of an adaptive angle rotary tiller according to one embodiment of the present invention;

[0019] Figure 2 This is one of the partial structural schematic diagrams of an adaptive angle rotary tiller in one embodiment of the present invention;

[0020] Figure 3 This is a second partial structural schematic diagram of an adaptive angle rotary tiller according to one embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of the transmission of an adaptive angle rotary tiller in one embodiment of the present invention;

[0022] Figure 5 This is a schematic diagram illustrating the switching of the working state of an adaptive angle rotary tiller in one embodiment of the present invention.

[0023] Legend:

[0024] 100. Adaptive angle rotary tiller; 10. Support bracket; 20. Rotary tiller frame; 30. Rotary tillage depth adjustment and positioning mechanism; 31. First swing arm; 32. Swing linkage; 33. Second swing arm; 34. Lifting adjustment linear drive positioning cylinder; 35. Left and right swing adjustment linear drive positioning cylinder; 40. Rotary tillage tilt angle adjustment and positioning mechanism; 41. Three-point suspension; 42. Front and rear swing adjustment linear drive positioning cylinder; 50. Transmission coupling mechanism; 51. First coupling; 52. Second coupling; 53. Third coupling; 54. Coupling output rod; 60. Gearbox support; 61. Support bushing; 62. Support housing; 70. Transmission shaft; 80. Housing support compensation and adjustment positioning mechanism; 91. Bushing support; 92. Bearing support.

[0025] The objectives, features, and advantages of this invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0026] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0028] 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 positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0029] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0030] Please refer to the appendix. Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 This invention provides an adaptive-angle rotary tiller 100, including a support bracket 10, a rotary tiller frame 20, a rotary tillage depth adjustment and positioning mechanism 30, and a rotary tillage tilt angle adjustment and positioning mechanism 40. The first end of the rotary tillage depth adjustment and positioning mechanism 30 is connected to the support bracket 10, and the second end of the rotary tillage depth adjustment and positioning mechanism 30 is cantilevered outward and hinged to the rotary tiller frame 20. A hinged swing axis exists between the rotary tillage depth adjustment and positioning mechanism 30 and the rotary tiller frame 20. The first end of the rotary tillage tilt angle adjustment and positioning mechanism 40 is connected to the support bracket 10, and the second end of the rotary tillage tilt angle adjustment and positioning mechanism 40 extends outward and is hinged to the rotary tiller frame 20. The support bracket 10, the rotary tillage depth adjustment and positioning mechanism 30, the rotary tillage tilt angle adjustment and positioning mechanism 40, and the rotary tiller frame 20 combine to form a four-bar linkage mechanism. The rotary tillage depth adjustment and positioning mechanism 40... The rotary tiller frame 20 is driven by the structure 30 to swing and position itself in the height direction. The rotary tiller frame 20 is driven to swing back and forth around the hinge swing axis and position itself by the rotary tillage tilt angle adjustment and positioning mechanism 40. The adaptive angle rotary tiller 100 also includes a transmission coupling mechanism 50, a gearbox support 60, a transmission shaft 70, and a gearbox support compensation adjustment and positioning mechanism 80. The gearbox support 60 is rotatably mounted on the rotary tiller frame 20. The transmission shaft 70 is rotatably mounted inside the gearbox support 60. The transmission coupling mechanism 50 is arranged intersecting with the transmission shaft 70. The transmission coupling mechanism 50 is rotatably supported on the gearbox support 60. The output end of the transmission coupling mechanism 50 extends into the gearbox support 60 and is connected to the input end of the transmission shaft 70. The gearbox support compensation adjustment and positioning mechanism 80 is used to drive the gearbox support 60 to rotate and position itself around the central axis.

[0031] The adaptive-angle rotary tiller 100 provided by the present invention includes a support bracket 10, a rotary tiller frame 20, a rotary tillage depth adjustment and positioning mechanism 30, and a rotary tillage tilt angle adjustment and positioning mechanism 40. The support bracket 10, the rotary tillage depth adjustment and positioning mechanism 30, the rotary tillage tilt angle adjustment and positioning mechanism 40, and the rotary tiller frame 20 are combined to form a four-bar linkage. The rotary tiller frame 20 is suspended behind the support bracket 10 under the action of the rotary tillage depth adjustment and positioning mechanism 30 and the rotary tillage tilt angle adjustment and positioning mechanism 40. The rotary tillage depth adjustment and positioning mechanism 30 drives the rotary tiller frame 20 to swing and position in the height direction, and the rotary tillage tilt angle adjustment and positioning mechanism 40 drives the rotary tiller frame. The rotary tiller frame 20 swings back and forth around the hinge axis and is positioned, which can adjust the tillage depth and tillage tilt angle of the rotary tiller frame 20. The rotary tiller 100 with adaptive angle also includes a transmission coupling mechanism 50, a gearbox support 60, a transmission shaft 70, and a box support compensation adjustment and positioning mechanism 80. When the rotary tiller frame 20 is raised, lowered, or laterally swung, the box support compensation adjustment and positioning mechanism 80 extends and retracts, causing the gearbox support 60 to swing around the mounting axis. Under the condition that the cooperation relationship between the transmission shaft 70 and the transmission coupling mechanism 50 remains unchanged, it is beneficial to reduce the transmission angle of the transmission coupling mechanism 50, which is beneficial to improve transmission efficiency and the service life of the transmission shaft 70.

[0032] Understandably, the rotary tiller frame 20 is hingedly suspended on the rotary tillage depth adjustment and positioning mechanism 30 and the rotary tillage tilt angle adjustment and positioning mechanism 40, and there is a hinged swing axis between the rotary tillage depth adjustment and positioning mechanism 30 and the rotary tiller frame 20.

[0033] Further, please refer to Figure 2 and Figure 4 The gearbox support 60 includes support bushings 61 and a support housing 62. Two support bushings 61 are arranged opposite each other on both sides of the support housing 62 and are fixedly connected to the support housing 62. A transmission shaft 70 is arranged correspondingly to each support bushing 61. The transmission shaft 70 is located inside the support bushing 61 and is rotatably arranged relative to the support bushing 61. The input end of the transmission shaft 70 extends into the support housing 62. A transmission coupling mechanism 50 is rotatably arranged relative to the support housing 62, and the output end of the transmission coupling mechanism 50 extends into the support housing 62 and is connected to the transmission shaft 70. In this invention, to facilitate assembly, the support bushings 61 and the support housing 62 are assembled separately. The support bushings 61 and the support housing 62 are connected by bolts. The transmission shaft 70 is arranged correspondingly to the support bushings 61 so that the transmission center is located on the mid-section of the rotary tiller frame 20.

[0034] Furthermore, the adaptive angle rotary tiller 100 also includes a bushing support 91 and a bearing support 92. The left and right ends of the rotary tiller frame 20 are respectively provided with bushing supports 91. The outer ring of the bushing support 91 is positioned and assembled at the end of the rotary tiller frame 20. The inner ring of the bushing support 91 is equipped with a support bushing 61. The bearing support 92 is located inside the support bushing 61. The outer ring of the bearing support 92 is positioned and assembled inside the support bushing 61. The inner ring of the bearing support 92 is equipped with a transmission shaft 70.

[0035] Please refer to Figure 3 Furthermore, the transmission coupling mechanism 50 includes a first coupling 51, a second coupling 52, a third coupling 53, and a coupling output rod 54. The first end of the second coupling 52 is hinged to the first coupling 51 and is laterally swayable relative to the first coupling 51. The second end of the second coupling 52 is hinged to the first end of the third coupling 53 and is vertically swayable relative to the third coupling 53. The first end of the coupling output rod 54 is circumferentially limited to the second end of the third coupling 53. The second end of the coupling output rod 54 is rotatably supported on the support housing 62 and extends into the support housing 62. Understandably, if the gearbox support 60 cannot rotate on the rotary tiller frame 20, when the rotary tiller frame 20 is in the high position, the gearbox support 60 and the coupling output rod 54 are simultaneously in the high position, and the third coupling 53 is circumferentially limited to the coupling output rod 54. At this time, the third coupling 53 and the second coupling 52 have a high-position angle. When the rotary tiller frame 20 is in the low position, the gearbox support 60 and the coupling output rod 54 are simultaneously in the low position, and the third coupling 53 is circumferentially limited to the coupling output rod 54. At this time, the third coupling 53 and the second coupling 52 have a low-position angle. If the third coupling 53 and the second coupling 52 are in the high position... If the third coupling 53 and the second coupling 52 are arranged in a straight line, then at the low position, the third coupling 53 and the second coupling 52 have a large transmission angle. If the third coupling 53 and the second coupling 52 are arranged in a straight line at the low position, then at the high position, the third coupling 53 and the second coupling 52 have a large transmission angle. This presents a technical problem: the transmission angle is too large, resulting in high noise, affecting service life and transmission efficiency. In this invention, by setting the gearbox support 60 to be rotatable on the rotary tiller frame 20 around the mounting axis, adaptive compensation is performed when adjusting the working position of the rotary tiller frame 20, which helps to reduce the transmission angle between the third coupling 53 and the second coupling 52.

[0036] Furthermore, in order to perform axial compensation and avoid jamming, the third coupling 53 and the coupling output rod 54 are connected by a spline fit. At this time, the third coupling 53 can move axially relative to the coupling output rod 54 and drive the coupling output rod 54 to rotate synchronously.

[0037] Understandably, the transmission shaft 70 and the coupling output rod 54 are connected by bevel gears within the support housing 62. The coupling output rod 54 is provided with an active cone, and the transmission shaft 70 is provided with a driven bevel gear. The coupling output rod 54 and the transmission shaft 70 are arranged in a T-shape.

[0038] Furthermore, the box support compensation and adjustment positioning mechanism 80 includes a compensation and adjustment linear drive positioning cylinder, which is hinged between the support box 62 and the support bracket 10. The compensation and adjustment linear drive positioning cylinder drives the gearbox support 60 to rotate around the central axis, causing the coupling output rod to drive the third coupling 53 to swing and adjust the angle between the third coupling 53 and the second coupling 52. Optionally, in this invention, the compensation and adjustment linear drive positioning cylinder is a hydraulic cylinder. The hydraulic cylinder extends and retracts, and positions itself to drive the gearbox support 60 to swing relative to the rotary tiller frame 20 around the installation central axis.

[0039] Furthermore, in order to adjust the rotary tillage depth and reduce interference, the rotary tillage depth adjustment positioning mechanism 30 includes a first swing rod 31, a swing connecting rod 32, and a second swing rod 33. The first swing rod 31 and the second swing rod 33 are respectively hinged on the support bracket 10, with the first swing rod 31 positioned above the second swing rod 33. The swing connecting rod 32 is located on one side of the support bracket 10, with both ends hinged to the first swing rod 31 and the second swing rod 33, respectively. The first swing rod 31, the second swing rod 33, and the swing connecting rod 32 on the support bracket 10 form a quadrilateral connection mechanism. The second swing rod 33 is cantilevered outward and hinged to the rotary tiller frame 20. The mechanism also includes a lifting adjustment linear drive positioning cylinder 34, which is hinged between the first swing rod 31 and the support bracket 10. The lifting adjustment linear drive positioning cylinder 34 drives the first swing rod 31 to swing, causing the cantilevered end of the second swing rod 33 to swing vertically.

[0040] Furthermore, quadrilateral connecting mechanisms are provided on both sides of the support bracket 10, and the lifting adjustment linear drive positioning cylinder 34 is arranged in a one-to-one correspondence with the quadrilateral connecting mechanisms.

[0041] Furthermore, to achieve adjustment of the rotary tillage tilt angle and reduce interference, the rotary tillage depth adjustment and positioning mechanism 30 also includes a left-right swing adjustment linear drive positioning cylinder 35. The first swing rod 31 is ball-jointed with the support bracket 10, and the second swing rod 33 is also ball-jointed with the support bracket 10. The left-right swing adjustment linear drive positioning cylinder 35 is arranged in a one-to-one correspondence with the second swing rod 33. The left-right swing adjustment linear drive positioning cylinder 35 is hinged between the second swing rod 33 and the support bracket 10, driving the quadrilateral connecting mechanism to swing left and right and position itself. Optionally, in this invention, the left-right swing adjustment linear drive positioning cylinder 35 is a hydraulic cylinder.

[0042] Furthermore, the rotary tillage tilt angle adjustment and positioning mechanism 40 includes a three-point suspension 41 and a front-to-back swing adjustment linear drive positioning cylinder 42. The first end of the front-to-back swing adjustment linear drive positioning cylinder 42 is hinged to the top end of the three-point suspension 41, and the three radiating ends of the three-point suspension 41 are respectively hinged to the rotary tiller frame 20. The front-to-back swing adjustment linear drive positioning cylinder 42 drives the rotary tiller frame 20 to swing and position around the hinged swing axis. Optionally, in this invention, the front-to-back swing adjustment linear drive positioning cylinder 42 is a hydraulic cylinder.

[0043] Understandably, the adaptive angle rotary tiller 100 of the present invention allows the rotary tiller frame 20 to move up and down to adjust the tillage depth, swing left and right to adjust the tillage lateral angle (with the cooperation of the first coupling 51 and the second coupling 52), and swing around the hinged swing axis to adjust the tillage tilt angle. Furthermore, under the adaptive compensation of the transmission coupling mechanism 50, the gearbox support 60, the transmission shaft 70, and the box support compensation and adjustment positioning mechanism 80, the transmission coupling mechanism 50 includes the first coupling 51, the second coupling 52, the third coupling 53, and the coupling output rod 54. The third coupling 53 and the coupling output rod 54 are connected by a spline connection. After the rotary tiller frame 20 adjusts its working position, this helps to ensure a smaller transmission angle between the third coupling 53 and the second coupling 52, which is beneficial for improving transmission efficiency and the service life of the transmission shaft 70.

[0044] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural or procedural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.

Claims

1. An adaptive angle rotary cultivator, characterized in that, comprising a support bracket, a rotary cultivator frame, a rotary cultivator depth adjustment positioning mechanism and a rotary cultivator angle adjustment positioning mechanism, the first end of the rotary cultivator depth adjustment positioning mechanism is connected with the support bracket, the second end of the rotary cultivator depth adjustment positioning mechanism is arranged outwardly cantilevered and hingedly connected with the rotary cultivator frame, the rotary cultivator depth adjustment positioning mechanism and the rotary cultivator frame have a hinged swing axis, the first end of the rotary cultivator angle adjustment positioning mechanism is connected with the support bracket, the second end of the rotary cultivator angle adjustment positioning mechanism extends outwardly and is hingedly connected with the rotary cultivator frame, the support bracket, the rotary cultivator depth adjustment positioning mechanism, the rotary cultivator angle adjustment positioning mechanism and the rotary cultivator frame combine to form a four-bar linkage mechanism, the rotary cultivator frame is driven to swing and position in the height direction by the rotary cultivator depth adjustment positioning mechanism, the rotary cultivator frame is driven to swing and position forward and backward around the hinged swing axis by the rotary cultivator angle adjustment positioning mechanism, the adaptive angle rotary cultivator further comprises a transmission coupling mechanism, a gearbox support, a transmission shaft and a gearbox support compensation adjustment positioning mechanism, the gearbox support is rotatably arranged on the rotary cultivator frame, the transmission shaft is rotatably arranged in the gearbox support, the transmission coupling mechanism is arranged intersecting with the transmission shaft, the transmission coupling mechanism is rotatably supported on the gearbox support, the output end of the transmission coupling mechanism extends into the gearbox support and is in transmission connection with the input end of the transmission shaft, the gearbox support compensation adjustment positioning mechanism is used to drive the gearbox support to rotate and position around the central axis, the gearbox support comprises a support shaft sleeve and a support box body, two support shaft sleeves are oppositely arranged on both sides of the support box body and are fixedly connected with the support box body, the transmission shaft is arranged corresponding to the support shaft sleeve, the transmission shaft is arranged in the support shaft sleeve and is rotatably arranged relative to the support shaft sleeve, the input end of the transmission shaft extends into the support box body, the transmission coupling mechanism is rotatably arranged relative to the support box body and the output end of the transmission coupling mechanism extends into the support box body and is in transmission connection with the transmission shaft, the adaptive angle rotary cultivator further comprises a shaft sleeve support and a bearing support, the rotary cultivator frame is provided with the shaft sleeve support at both ends, the outer ring of the shaft sleeve support is positioned and assembled at the end of the rotary cultivator frame, the inner ring of the shaft sleeve support is assembled with the support shaft sleeve, the bearing support is arranged in the support shaft sleeve, the outer ring of the bearing support is positioned and assembled in the support shaft sleeve, the inner ring of the bearing support is assembled with the transmission shaft, The box supporting compensation adjusting positioning mechanism comprises a compensation adjusting linear drive positioning cylinder, which is hinged between the supporting box body and the supporting support, and drives the transmission shaft coupling mechanism to rotate around the central axis, so that the coupling output rod of the transmission shaft coupling mechanism drives the third shaft coupling of the transmission shaft coupling mechanism to swing, and the included angle between the third shaft coupling and the second shaft coupling of the transmission shaft coupling mechanism is adjusted.

2. The self-adapting angle rotary cultivator according to claim 1, wherein The transmission shaft coupling mechanism comprises a first shaft coupling, a second shaft coupling, a third shaft coupling and a shaft coupling output rod, the first end of the second shaft coupling is hinged with the first shaft coupling and is arranged to be swingable transversely relative to the first shaft coupling, the second end of the second shaft coupling is hinged with the first end of the third shaft coupling and is arranged to be swingable vertically relative to the third shaft coupling, the first end of the shaft coupling output rod is connected with the second end of the third shaft coupling in a circumferential limiting manner, and the second end of the shaft coupling output rod is rotatably supported on the supporting box body and extends into the supporting box body.

3. The self-adapting angle rotary cultivator according to claim 2, wherein The third shaft coupling and the shaft coupling output rod are connected through spline fitting.

4. The self-adapting angle rotary cultivator according to any one of claims 1 to 3, wherein The rotary cultivation depth adjusting positioning mechanism comprises a first swing lever, a swing connecting rod and a second swing lever, the first swing lever and the second swing lever are respectively hinged on the supporting support, the first swing lever is above the second swing lever, the swing connecting rod is arranged on one side of the supporting support and is hinged at both ends with the first swing lever and the second swing lever, the first swing lever, the second swing lever and the swing connecting rod arranged on the supporting support form a quadrilateral connecting mechanism, the second swing lever is cantilevered outward and is hinged with the rotary cultivation frame, Further comprising a lifting adjusting linear drive positioning cylinder, which is hinged between the first swing lever and the supporting support, and drives the first swing lever to swing and drives the cantilevered end of the second swing lever to swing in the vertical direction through the lifting adjusting linear drive positioning cylinder.

5. The self-adapting angle rotary cultivator according to claim 4, wherein Both sides of the supporting support are respectively provided with the quadrilateral connecting mechanism, and the lifting adjusting linear drive positioning cylinders are correspondingly arranged with the quadrilateral connecting mechanisms.

6. The self-adapting angle rotary cultivator according to claim 5, wherein The rotary cultivation depth adjusting positioning mechanism further comprises a left-right swing adjusting linear drive positioning cylinder, The first swing lever is spherically connected with the supporting support, the second swing lever is spherically connected with the supporting support, the left-right swing adjusting linear drive positioning cylinder is correspondingly arranged with the second swing lever, the left-right swing adjusting linear drive positioning cylinder is hinged between the second swing lever and the supporting support, and the quadrilateral connecting mechanism is driven to swing left and right and positioned through the left-right swing adjusting linear drive positioning cylinder.

7. The self-adaptive angle rotary cultivator according to any one of claims 1-3, characterized in that, the rotary cultivator angle adjusting positioning mechanism comprises a three-point suspension and a front-rear swing adjusting linear drive positioning cylinder, a first end of the front-rear swing adjusting linear drive positioning cylinder is hinged to a top end of the three-point suspension, three scattered ends of the three-point suspension are respectively hinged to the rotary cultivator frame, and the rotary cultivator frame is driven to swing and positioned around the hinged swing axis by the front-rear swing adjusting linear drive positioning cylinder.

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