A self-propelled crawler rotary tiller

Abstract

The present application discloses a self-propelled crawler rotary tiller, by arranging a floating rod on the rotary tiller frame and a sliding block which is installed in cooperation with a transmission frame, the floating rod is used to support the rotary tiller frame on the ground when rotary tilling, and then directly feeds back to the sliding block according to the undulation of the ground, and the sliding adjustment can be carried out in cooperation with the transmission frame by the setting of the slide groove, so that the rotary tiller frame as a whole can realize floating adjustment, and does not require oil valve control, which is more convenient and saves resources. A knife seat is rotatably installed on the drive shaft, and a rotating plow is installed on the knife seat, and the change of resistance encountered by the plow when cutting into the ground is used to change the extension and contraction of the cylinder-driven telescopic shaft, thereby controlling the rotation of the knife seat, realizing the left and right swing of the plow when rotary tilling, so that the ground is fully loosened, and on the other hand, the plow can be swung as quickly as possible according to the change of resistance to loosen the soil, thereby reducing the wear effect of solid soil on the plow and improving the service life of the plow.

Description

Technical Field

[0001] The present application relates to the technical field of rotary tillers, and in particular to a self-propelled crawler rotary tiller. Background Art

[0002] A rotary tiller is a tilling machine that works with a tractor to complete plowing and harrowing operations. It has been widely used due to its strong soil crushing ability and flat surface after plowing. In some hilly and mountainous areas, arable land is difficult to cultivate, aging is serious, and much land is abandoned. Existing four-wheel tractors are not easy to navigate in mountainous areas, which increases the labor intensity of users. Therefore, crawler rotary tillers are now used to reduce labor and solve the problem of not being able to use a paddle to perform rotary tillage operations in fields with mud ≥35 cm deep. While it is very convenient for hilly and mountainous areas, it still has certain shortcomings:

[0003] First, the existing rotary tillers work on uneven ground, and the tilling depth of the rotary tillers is certain. In this way, when the rotary tillers are working, it is necessary to control the rotary tilling mechanism to adjust to the undulating changes in the land, so as to achieve the effect of uniform rotary tillage. However, this requires the use of a hydraulic system and the use of structures such as oil valves for control, which is more troublesome and time-consuming. Secondly, when rotary tilling, the shaft directly drives the plow blade to rotate to turn over and loosen the soil. This only has a rotation and flipping effect in the vertical direction. Many soil blocks are just turned over, and no effective loosening effect is achieved. At the same time, when encountering some relatively solid land, the plow blade will be subjected to greater resistance. At this time, maintaining the existing drive rotation will affect the wear of the plow blade and greatly reduce its service life. Summary of the Invention

[0004] The present application proposes a self-propelled crawler rotary tiller, which has the advantages of low transmission consumption and good rotary tillage effect, and is used to solve the problems raised by the background technology.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical solution: a self-propelled crawler rotary tiller, comprising a body, a connecting frame fixedly installed at the tail of the body, a rotary tiller frame movably connected to the tail of the connecting frame, a transmission frame movably installed at the connection between the connecting frame and the rotary tiller frame, a hydraulic cylinder movably installed in the middle of the connecting frame, the output shaft of the hydraulic cylinder is fixedly connected to a sliding block, and the sliding block is connected to the bottom of the middle section of the transmission frame by a pin, a transmission mechanism is fixedly installed on one side of the transmission frame, a transmission box is fixedly installed on one side of the rotary tiller frame, and the transmission box and the transmission mechanism are connected through a transmission structure, a fender is fixedly installed on the back of the rotary tiller frame, a drive shaft is rotatably installed inside the rotary tiller frame, a knife seat is evenly installed on the outer ring of the drive shaft, a plow blade is movably installed on the outer end of the knife seat, and a floating rod is fixedly installed at the bottom of the transmission box.

[0006] Furthermore, a sliding groove is provided in the middle of the sliding block, and the middle of the pin installed at the bottom of the transmission frame passes through the sliding groove. When the floating rod contacts the ground and tilts, the pin slides inside the sliding groove.

[0007] Furthermore, a rotation groove is provided on the outer side of the drive shaft, and the tool holder is rotatably sleeved in the rotation groove, a mounting groove is provided on the outer end of the tool holder, and the end of the plow is sleeved inside the mounting groove, a fixed shaft is fixedly installed inside the mounting groove, and the plow is sleeved on the outer ring of the fixed shaft and rotates, a sliding rod is fixedly installed on one end of the plow located inside the mounting groove, and the end of the slide rod is in sliding contact with the inner wall of the mounting groove.

[0008] Furthermore, a first butterfly spring and a second butterfly spring are respectively fixedly installed between the sliding rod and the inner wall of the mounting groove. The first butterfly spring is installed on the side of the sliding rod close to the rotation direction when the plow is working. The first contact and the second contact are respectively fixedly installed on the bottom wall of the mounting groove, and the sliding rod contacts the first contact and the second contact respectively when sliding in the mounting groove.

[0009] Furthermore, the elastic force of the first butterfly spring is greater than the elastic force of the second butterfly spring. When the plow is not subjected to external force and under the action of the elastic force of the first butterfly spring and the second butterfly spring, the sliding rod contacts the first contact, and when the plow rotates to the maximum position along the fixed axis, the sliding rod contacts the second contact.

[0010] Furthermore, a transmission groove is opened in the middle of one end of the knife seat located inside the rotating groove, a gear is fixedly installed in the middle of the transmission groove, a cylinder is fixedly installed at a position on one side of the knife seat inside the driving shaft, a telescopic shaft is movably installed at one end of the cylinder close to the knife seat, and the end of the telescopic shaft is fixedly connected to a rack that meshes with the gear, and the rack passes through the transmission groove.

[0011] The present application provides a self-propelled crawler rotary tiller, which is provided with a floating rod on the rotary tiller frame and a sliding block mounted in cooperation with the transmission frame. Compared with the prior art, the floating rod is used to support the rotary tiller frame on the ground during rotary tillage, and then the fluctuation of the ground is directly fed back to the sliding block. The sliding groove is provided to cooperate with the transmission frame for sliding adjustment, so that the rotary tiller frame as a whole can achieve floating adjustment. There is no need for oil valve control, and the floating rod directly detects the fluctuation of the ground and generates tilt changes for feedback, thereby achieving automatic floating adjustment, which is more convenient and saves resources.

[0012] By arranging a knife seat to be rotatably mounted on the drive shaft, and installing a rotatable plow on the knife seat, compared with the existing technology, the change in resistance encountered by the rotatable plow when cutting into the soil is utilized to change the extension and contraction of the telescopic shaft driven by the cylinder, thereby controlling the rotation of the knife seat. In this way, the plow can be driven by the knife seat to swing slightly left and right when rotary tilling. On the one hand, the soil is fully loosened, and on the other hand, the plow can be swung as quickly as possible according to the change in resistance to loosen the soil, thereby reducing the wear and tear of the plow caused by solid soil and increasing the service life of the plow. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments disclosed herein and, together with the description, serve to explain the principles disclosed herein.

[0014] The present disclosure can be more clearly understood from the following detailed description with reference to the accompanying drawings, in which:

[0015] Figure 1 It is a schematic front view of the overall structure of the present invention;

[0016] Figure 2 It is a schematic rear view of the overall structure of the present invention;

[0017] Figure 3 This is a schematic diagram of the overall connection structure of the present invention;

[0018] Figure 4 This is an overall top view of the rotary tiller frame of the present invention;

[0019] Figure 5 This is an overall side view of the rotary tiller frame of the present invention;

[0020] Figure 6 for Figure 4 Middle AA section;

[0021] Figure 7 It is a partial transverse cross-sectional view of the drive shaft;

[0022] Figure 8 This is an enlarged view of point B in 6;

[0023] Figure 9 This is a schematic diagram of the sliding block structure of the present invention.

[0024] Among them: 1. Machine body; 2. Connecting frame; 3. Rotary tiller frame; 4. Hydraulic cylinder; 5. Transmission frame; 6. Sliding block; 601, slide; 7. Transmission mechanism; 8. Fender; 9. Transmission box; 10. Drive shaft; 1001, Rotary groove; 11. Floating rod; 12. Blade holder; 1201, Mounting groove; 1202, Transmission groove; 13. Plow blade; 14. Fixed shaft; 15. Sliding rod; 16. First butterfly spring; 17. Second butterfly spring; 18. First contact; 19. Second contact; 20. Gear; 21. Cylinder; 22. Telescopic shaft; 23. Rack. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0026] See also Figures 1-9 A self-propelled crawler rotary tiller comprises a body 1, a connecting frame 2 is fixedly mounted on the tail of the body 1, a rotary tiller frame 3 is movably connected to the tail of the connecting frame 2, a transmission frame 5 is movably mounted at the connection between the connecting frame 2 and the rotary tiller frame 3, a hydraulic cylinder 4 is movably mounted on the middle part of the connecting frame 2, the output shaft of the hydraulic cylinder 4 is fixedly connected to a sliding block 6, and the sliding block 6 is connected to the bottom of the middle section of the transmission frame 5 by a pin, a transmission mechanism 7 is fixedly mounted on one side of the transmission frame 5, a transmission box 9 is fixedly mounted on one side of the rotary tiller frame 3, and the transmission box 9 is connected to the transmission mechanism 7 through a transmission structure, a fender 8 is fixedly mounted on the back of the rotary tiller frame 3, a drive shaft 10 is rotatably mounted inside the rotary tiller frame 3, a knife seat 12 is evenly mounted on the outer ring of the drive shaft 10, a plow 13 is movably mounted on the outer end of the knife seat 12, a floating rod 11 is fixedly mounted at the bottom of the transmission box 9, the middle of the sliding block 6 A slide groove 601 is provided on the bottom, and the middle part of the pin installed at the bottom of the transmission frame 5 passes through the slide groove 601. When the floating rod 11 contacts the ground and tilts, the pin slides inside the slide groove 601. In this way, when the rotary tiller is working, the rotary tiller frame 3 moves on the land as a whole, and the floating rod 11 is kept in contact with the ground. When the bottom surface fluctuates, the floating rod 11 will be directly fed back and produce a certain tilt under the action of the supporting force, and the tilt is fed back to the sliding block 6. Because the transmission frame 5 and the sliding block 6 are connected by the pin and slide in the slide groove 601, the fluctuation of the ground causes the transmission frame 5 as a whole and the sliding block 6 to produce relative movement, that is, the rotary tiller frame 3 as a whole can float up and down following the fluctuation of the ground, thereby achieving better rotary tillage effect, and no oil valve control is required, which also saves energy and realizes automatic up and down floating.

[0027] See also Figure 5-Figure 8, a rotating groove 1001 is provided on the outer side of the driving shaft 10, and the knife seat 12 is rotatably sleeved in the rotating groove 1001, and a mounting groove 1201 is provided on the outer end of the knife seat 12, and the end of the plow 13 is sleeved inside the mounting groove 1201, and a fixed shaft 14 is fixedly installed inside the mounting groove 1201, and the plow 13 is sleeved on the outer ring of the fixed shaft 14 and rotates, and a sliding rod 15 is fixedly installed on one end of the plow 13 located inside the mounting groove 1201, and the end of the sliding rod 15 is in sliding contact with the inner wall of the mounting groove 1201, and the plow 13 is rotatably installed inside the mounting groove 1201 and is limitedly rotated by the fixed shaft 14. In this way, when rotary tillage is performed, the plow 13 is pressed against the soil and is subjected to resistance, which is fed back to the inside of the mounting groove 1201, so that the plow 13 produces a certain angle of deflection, and also drives the slide bar 15 to slide and contact the second contact 19, and then controls the cylinder 21 to realize the extension of the telescopic shaft 22 to realize the rotation adjustment of the knife seat 12, and the first butterfly spring 16 and the second butterfly spring 17 are fixedly installed between the slide bar 15 and the inner wall of the mounting groove 1201 respectively. The first butterfly spring 16 is installed on the side of the slide bar 15 close to the rotation direction of the plow blade 13 when working. The inner bottom wall of the mounting groove 1201 is fixedly installed with the first contact 18 and the second contact 19 respectively, and the slide bar 15 contacts the first contact 18 and the second contact 19 respectively when sliding in the mounting groove 1201. The first contact 18 and the second contact 19 are both linearly connected to the cylinder 21, and a power connection is provided on the drive shaft 10 to realize The electrical connection between the slide bar 15 and the cylinder 21 can control the plow 13 through the first butterfly spring 16 and the second butterfly spring 17. When only the first butterfly spring 16 and the second butterfly spring 17 act on the slide bar 15, the slide bar 15 is kept in contact with the first contact 18. When the plow is rotary plowed into the soil, the plow 13 overcomes the elastic force of the first butterfly spring 16 due to the resistance, so that the slide bar 15 contacts the second contact 19. In this way, the cylinder 21 can be controlled to adjust the swing of the knife holder 12 when rotary plowing the soil. In this way, the loosening effect can be further improved during rotary plowing, and the timing of the swing can be controlled according to the firmness of the soil, thereby also playing a certain role in protecting the service life of the plow 13. The elastic force of the first butterfly spring 16 When the plow blade 13 is not subjected to external force, under the action of the first butterfly spring 16 and the second butterfly spring 17, the slide bar 15 contacts the first contact 18, and when the plow blade 13 rotates to the maximum position along the fixed shaft 14, the slide bar 15 contacts the second contact 19, and the first butterfly spring 16 and the second butterfly spring 17 play a preliminary limiting role. At this time, the elastic force of the first butterfly spring 16 is greater than the second butterfly spring 17, which will cause the slide bar 15 to slide against the first contact 18. At this time, the control cylinder 21 drives the telescopic shaft 22 to the shortest telescopic length, that is, the rack 23 drives the gear 20 to rotate to the side closest to the cylinder 21. At this time, the knife seat 12 tilts to one side, and after the plow blade 13 rotates due to the resistance of the ground,The slide bar 15 will slide and contact the second contact 19. At this time, the control cylinder 21 drives the telescopic shaft 22 to extend to the maximum, and drives the knife seat 12 to rotate to the other side position. In this process, the swing effect of the plow 13 on both sides is realized, and the rotary tillage of the plow 13 itself has a good soil loosening effect. The knife seat 12 is located in the middle of one end of the rotating groove 1001 and a transmission groove 1202 is opened. The middle of the transmission groove 1202 is fixedly installed with a gear 20. The cylinder 21 is fixedly installed at a position on one side of the knife seat 12 inside the drive shaft 10. The end of the cylinder 21 close to the knife seat 12 is movable A telescopic shaft 22 is installed, and the end of the telescopic shaft 22 is fixedly connected to a rack 23 that meshes with the gear 20. The rack 23 passes through the transmission slot 1202. The cylinder 21 drives the telescopic shaft 22 to extend and retract, which drives the rack 23 to adjust. The rotation adjustment of the knife holder 12 is then achieved through the meshing transmission. In this way, the swing adjustment of the knife holder 12 is achieved by changing the resistance encountered by the coulter 13 during rotary tillage, thereby assisting in loosening the soil. In addition, when encountering solid soil, the rotation adjustment of the knife holder 12 can be quickly triggered. This prevents the coulter 13 from being subjected to large resistance for a long time, thereby ensuring its service life.

[0028] Working principle: During rotary tillage, the worker drives on the machine body 1 and then drives the whole machine to move on the land. During the movement, the power is transmitted to the transmission frame 5 through the driving device, and then transmitted to the driving shaft 10 through the transmission mechanism 7 and the transmission box 9, thereby driving the driving shaft 10 at the bottom of the rotary tiller frame 3 to rotate and till. When the driving shaft 10 rotates, it drives the externally installed plow 13 to rotary till the land, and in this process, the floating rod 11 is always in contact with and supports the land surface. When the land fluctuates, the floating rod 11 will directly feel the change, thereby generating a certain tilt under the action of the supporting force, and the tilt is fed back to the sliding block 6. Because the transmission frame 5 and the sliding block 6 are connected by a pin column and slide in the slide groove 601, the fluctuation of the ground causes the transmission frame 5 and the sliding block 6 to move relative to each other, that is, the rotary tiller frame 3 as a whole can float up and down following the fluctuation of the ground, and no oil valve control is required;

[0029] At the same time, during the rotation of the drive shaft 10, when the plow blade 13 has not yet rotated to contact the ground, the plow blade 13 is deflected to one side by the elastic force of the internal first butterfly spring 16 and the second butterfly spring 17. At this time, the slide bar 15 slides and contacts the first contact 18 under the action of the elastic force, and the control cylinder 21 drives the telescopic shaft 22 to retract to the maximum position, that is, the rack 23 drives the gear 20 to rotate, so that the knife seat 12 rotates to one side, and then as the drive shaft 10 rotates, the plow blade 13 cuts into the ground. Under the resistance of the ground, the plow blade 13 will overcome the elastic force of the first butterfly spring 16, so that the plow blade 13 rotates. When the plow blade 13 rotates When the plow 13 is separated from the ground and rotated upward, the plow 13 is reset under the elastic force of the first butterfly spring 16 and the second butterfly spring 17, driving the knife seat 12 to rotate to its original position, until the next time the plow 13 is plowed into the ground, the swinging effect is realized, and the rotary tillage is realized in this way.

Claims

1. A self-propelled crawler rotary tiller, characterized in that: The invention comprises a machine body (1), a connecting frame (2) is fixedly installed at the tail of the machine body (1), a rotary tiller frame (3) is movably connected to the tail of the connecting frame (2), a transmission frame (5) is movably installed at the connection between the connecting frame (2) and the rotary tiller frame (3), a hydraulic oil cylinder (4) is movably installed in the middle of the connecting frame (2), a sliding block (6) is fixedly connected to the output shaft of the hydraulic oil cylinder (4), and the sliding block (6) is connected to the bottom of the middle section of the transmission frame (5) through a pin, and a transmission frame (5) is fixedly installed on one side. A driving mechanism (7) is provided, a transmission box (9) is fixedly installed on one side of the rotary tiller frame (3), and the transmission box (9) is connected to the transmission mechanism (7) through a transmission structure, a fender (8) is fixedly installed on the back of the rotary tiller frame (3), a driving shaft (10) is rotatably installed inside the rotary tiller frame (3), a knife seat (12) is evenly installed on the outer ring of the driving shaft (10), a plow (13) is movably installed on the outer end of the knife seat (12), and a floating rod (11) is fixedly installed at the bottom of the transmission box (9); The outer side of the driving shaft (10) is provided with a rotation groove (1001), and the blade seat (12) is rotatably sleeved in the rotation groove (1001), the outer end of the blade seat (12) is provided with a mounting groove (1201), and the end of the plow (13) is sleeved inside the mounting groove (1201), a fixed shaft (14) is fixedly installed inside the mounting groove (1201), and the plow (13) is sleeved on the outer ring of the fixed shaft (14) and rotates, and a sliding rod (15) is fixedly installed at one end of the plow (13) located inside the mounting groove (1201), and the end of the sliding rod (15) is in sliding contact with the inner wall of the mounting groove (1201); A first butterfly spring (16) and a second butterfly spring (17) are fixedly installed between the slide bar (15) and the inner wall of the installation groove (1201), respectively. The first butterfly spring (16) is installed on the side of the slide bar (15) close to the rotation direction of the plow blade (13) when working. A first contact (18) and a second contact (19) are fixedly installed on the inner bottom wall of the installation groove (1201), and the slide bar (15) contacts the first contact (18) and the second contact (19) respectively when sliding in the installation groove (1201); The elastic force of the first butterfly spring (16) is greater than the elastic force of the second butterfly spring (17). When the plow (13) is not subjected to external force and is under the elastic force of the first butterfly spring (16) and the second butterfly spring (17), the slide bar (15) contacts the first contact (18), and when the plow (13) rotates to the maximum position along the fixed axis (14), the slide bar (15) contacts the second contact (19).

2. A self-propelled crawler rotary tiller according to claim 1, characterized in that: A sliding groove (601) is provided in the middle of the sliding block (6), and the middle of the pin installed at the bottom of the transmission frame (5) passes through the sliding groove (601). When the floating rod (11) contacts the ground and tilts, the pin slides inside the sliding groove (601).

3. The self-propelled crawler rotary tiller according to claim 1, characterized in that: The knife seat (12) is provided with a transmission groove (1202) in the middle of one end inside the rotating groove (1001), and a gear (20) is fixedly installed in the middle of the transmission groove (1202). A cylinder (21) is fixedly installed at a position on one side of the knife seat (12) inside the driving shaft (10), and a telescopic shaft (22) is movably installed at one end of the cylinder (21) close to the knife seat (12). The end of the telescopic shaft (22) is fixedly connected to a rack (23) meshing with the gear (20), and the rack (23) passes through the transmission groove (1202).

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