Rotary tillage cutter shaft and rotary cultivator

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By designing the tool base plug groove and plug rod on the rotary tillage shaft, the separate replacement of the rotary tillage knife is achieved, solving the problem of the overall replacement of the rotary tillage shaft. The cutting piece prevents debris from wrapping the oil seal, which improves the maintenance efficiency and resource utilization of the rotary tillage machine.

CN223040534UActive Publication Date: 2025-07-01YANCHENG JIUTIAN MACHINERY CO LTD

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Patent Information

Application Number: CN202422179742.7
Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner
Filing Date: 2024-09-05
Publication Date: 2025-07-01
Estimated Expiration: 2034-09-05

AI Technical Summary

Technical Problem

The existing rotary tillage shaft and rotary tillage knife are welded and fixed, which results in the whole rotary tillage shaft when part of the rotary tillage knife is damaged, resulting in the waste of other normal rotary tillage knives.

Method used

A rotary tillage shaft is designed. The surface of the rotary tillage shaft is equipped with a knife base plug groove, and there is a plug rod on the rotary tillage knife. Through the cooperation of the plug rod and the spring, the damaged rotary tillage knife can be replaced separately, and a cutting piece is installed on the bearing seat to prevent debris from wrapping the oil seal.

Benefits of technology

The damaged rotary tiller is replaced separately, avoiding the waste of normal rotary tiller, and preventing debris from wrapping the oil seal through cutting sheets, improving the efficiency and maintainability of the rotary tiller.

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Abstract

The utility model relates to the technical field of rotary tillage cutter shafts, in particular to a rotary tillage cutter shaft and a rotary cultivator, which comprise a rotary tillage cutter shaft and bearing seats, two ends of the rotary tillage cutter shaft are rotatably connected in the two groups of bearing seats, an oil seal is sleeved on the surface of the rotary tillage cutter shaft, a plurality of groups of cutter seat inserting grooves are arranged on the surface of the rotary tillage cutter shaft, and the cutter seat inserting grooves are connected with the bearing seats. A rotary blade holder is movably inserted into the blade holder insertion groove; the rotary blade has the beneficial effects that when a certain group of rotary blades cannot be used, the group of rotary blades can be independently detached from the rotary blade shaft only by withdrawing the inserting rods arranged on the surfaces of the rotary blade holders below the group of rotary blades from the inserting grooves, and then the rotary blade holders at the bottom ends of new rotary blades are inserted into the empty blade holder inserting grooves, so that the rotary blades can be conveniently detached from the rotary blade shaft; then one end of the inserting rod is inserted into the inserting groove, and the other end of the inserting rod stays in the inserting rod mounting groove, so that a group of independent rotary blades which cannot be used can be replaced, and other rotary blades which can still be used are prevented from being wasted.

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Description

Technical Field

[0001] The utility model relates to the technical field of rotary tillage knife shafts, and specifically relates to a rotary tillage knife shaft and a rotary tiller. Background Art

[0002] A rotary tillage knife is a fitting of a rotary tiller used for tilling farmland. The rotary tillage knife is installed on a rotary tillage knife shaft, and the rotary tillage knife shaft is rotatably connected in a bearing seat. Meanwhile, an oil seal is sleeved on the surface of the rotary tillage knife shaft. The oil seal of the rotary tillage knife shaft is an important component in the rotary tiller for preventing oil leakage and preventing external impurities from entering.

[0003] However, the existing rotary tillage knife shaft and the rotary tillage knife are usually installed by welding and fixing. This leads to the situation that when some rotary tillage knives are broken and cannot work properly, the entire rotary tillage knife shaft can only be replaced, resulting in the waste of other rotary tillage knives that can still work normally. Content of the Utility Model

[0004] The purpose of the utility model is to provide a rotary tillage knife shaft and a rotary tiller to solve the problems put forward in the above background art.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A rotary tillage knife shaft, comprising: a rotary tillage knife shaft and a bearing seat. Both ends of the rotary tillage knife shaft are rotatably connected in two groups of bearing seats. An oil seal is sleeved on the surface of the rotary tillage knife shaft. A plurality of groups of knife seat insertion grooves are opened on the surface of the rotary tillage knife shaft. A rotary tillage knife seat is movably inserted in the knife seat insertion grooves. An insertion rod installation groove is opened on the surface of the rotary tillage knife seat. One end of an insertion rod is movably inserted in the insertion rod installation groove, and the other end of the insertion rod is movably inserted in an insertion groove. The insertion groove is opened on the inner wall of the groove body of the knife seat insertion groove. A rotary tillage knife is fixed at the top of the rotary tillage knife seat.

[0006] Preferably, a first spring is fixed between the end of the insertion rod extending into the insertion rod installation groove and the inner wall of the groove body of the insertion rod installation groove.

[0007] Preferably, the rotary tillage knife seat has an "L"-shaped plate-like structure. A lever window is opened at one end of the horizontal plate of the rotary tillage knife seat extending out of the knife seat insertion groove. A lever is slidably connected in the lever window. One end of the lever is fixed on the surface of the insertion rod, and the other end of the lever extends out of the lever window.

[0008] Preferably, a plug block is movably inserted in the lever window, and a pull block is fixed at the end of the plug block extending out of the lever window.

[0009] Preferably, a cutting disc screwing groove and a cutting disc disassembly and assembly groove are formed on the surface of the bearing seat. The cutting disc screwing groove is a circular ring-shaped groove body. One end of the cutting disc disassembly and assembly groove communicates with the cutting disc screwing groove, and the other end of the cutting disc disassembly and assembly groove is formed on the side surface of the bearing seat. A cutting disc is slidably connected in the cutting disc screwing groove, and a cutting disc base is fixed to the other end of the cutting disc. The cutting disc base is a "U"-shaped plate structure and is sleeved on the surface of the nearest set of rotary tiller blade seats from the bearing seat.

[0010] Preferably, pull rod grooves are formed on the surfaces of the two side plates of the cutting disc base. Pull rods are movably inserted into the pull rod grooves. One ends of the two groups of pull rods extending out of the pull rod grooves are fixed to the same group of moving plates. A spring plate is fixed to the end of the pull rod extending into the pull rod groove, and a second spring is sleeved on the rod body of the pull rod.

[0011] Preferably, a limiting rod is fixed to the surface of the moving plate, and a limiting groove is formed on the surface of the set of rotary tiller blade seats sleeved with the cutting disc base. The limiting rod is movably inserted into the limiting groove.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] For the rotary tiller shaft and the rotary tiller proposed by the present utility model, when a certain group of rotary tiller blades cannot be used, only need to make the insertion rod arranged on the surface of the rotary tiller blade seat below this group of rotary tiller blades withdraw from the insertion groove, then this group of rotary tiller blades can be separately removed from the rotary tiller shaft. Then, make the insertion rod arranged on the surface of the rotary tiller blade seat at the bottom end of a new group of rotary tiller blades completely retract into the insertion rod installation groove, and then insert the rotary tiller blade seat at the bottom end of this new group of rotary tiller blades into the empty blade seat insertion groove. After that, make one end of the insertion rod insert into the insertion groove, and the other end of the insertion rod stay in the insertion rod installation groove, then the replacement of a single group of unusable rotary tiller blades can be realized, avoiding the waste of other still usable rotary tiller blades. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural diagram of the present utility model;

[0015] Figure 2 is a schematic sectional structural diagram of the present utility model;

[0016] Figure 3 is Figure 2 an enlarged schematic diagram of the structure at A in

[0017] Figure 4 is a schematic sectional structural diagram of the limiting rod;

[0018] Figure 5 is a schematic sectional structural diagram of the pull rod;

[0019] Figure 6 isFigure 5 Schematic enlarged view of the structure at position B in the middle.

[0020] In the figure: rotary tillage knife shaft 1, bearing seat 2, rotary tillage knife seat 3, socket rod installation groove 4, socket groove 5, socket rod 6, first spring 7, lever window 8, lever 9, plug block 10, pull block 11, rotary tillage knife 12, cutting blade base 13, cutting blade 14, cutting blade rotary connection groove 15, cutting blade disassembly and assembly groove 16, moving plate 17, limit rod 18, limit groove 19, pull rod groove 20, spring plate 21, pull rod 22, second spring 23, knife seat socket groove 24. Specific implementation mode

[0021] In order to clearly and completely describe the purpose, technical solution of the present utility model, and make the advantages more clear, the following further details the embodiments of the present utility model with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present utility model, rather than all the embodiments, and are only used to explain the embodiments of the present utility model, not to limit the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0022] Embodiment 1: Please refer to Figures 1 to 3 , the present utility model provides a technical solution: a rotary tillage knife shaft, including: rotary tillage knife shaft 1 and bearing seat 2. The two ends of the rotary tillage knife shaft 1 are rotatably connected in two groups of bearing seats 2. An oil seal is sleeved on the surface of the rotary tillage knife shaft 1. A plurality of groups of knife seat socket grooves 24 are opened on the surface of the rotary tillage knife shaft 1. A rotary tillage knife seat 3 is movably inserted into the knife seat socket groove 24. An installation groove 4 for a socket rod is opened on the surface of the rotary tillage knife seat 3. One end of a socket rod 6 is movably inserted into the installation groove 4 for a socket rod. The other end of the socket rod 6 is movably inserted into the socket groove 5. The socket groove 5 is opened on the inner wall of the groove body of the knife seat socket groove 24. A rotary tillage knife 12 is fixed at the top end of the rotary tillage knife seat 3.

[0023] For this rotary tillage knife shaft and rotary tillage machine, when a certain group of rotary tillage knives 12 cannot be used, only need to make the socket rod 6 arranged on the surface of the rotary tillage knife seat 3 below this group of rotary tillage knives 12 withdraw from the socket groove 5, then this group of rotary tillage knives 12 can be separately removed from the rotary tillage knife shaft 1. Then make the socket rod 6 arranged on the surface of the rotary tillage knife seat 3 at the bottom end of a new group of rotary tillage knives 12 completely retract into the socket rod installation groove 4, and then insert the rotary tillage knife seat 3 at the bottom end of this new group of rotary tillage knives 12 into the empty knife seat socket groove 24. After that, make one end of the socket rod 6 insert into the socket groove 5, and the other end of the socket rod 6 stay in the socket rod installation groove 4, then it can realize the replacement of a single group of unusable rotary tillage knives 12, avoiding the waste of other still usable rotary tillage knives 12.

[0024] Embodiment 2: On the basis of embodiment 1, in order to control the position of the plug-in rod 6, a first spring 7 is fixed between one end of the plug-in rod 6 extending into the plug-in rod mounting groove 4 and the inner wall of the slot body of the plug-in rod mounting groove 4. The rotary tiller blade seat 3 is an "L"-shaped plate structure, and a lever window 8 is provided at one end of the horizontal plate of the rotary tiller blade seat 3 extending out of the blade seat plug-in groove 24. A lever 9 is slidably connected to the lever window 8. One end of the lever 9 is fixed on the surface of the plug-in rod 6, and the other end of the lever 9 extends out of the lever window 8. A plug block 10 is movably inserted in the lever window 8, and a pull block 11 is fixed to the end of the plug block 10 extending out of the lever window 8.

[0025] When the plug rod 6 needs to be fully retracted into the plug rod installation groove 4, first pinch the pull block 11 to pull the plug block 10 out of the lever window 8, and then push the lever 9. The lever 9 slides in the lever window 8 toward the direction of the vertical rod close to the rotary blade seat 3, driving the plug rod 6 to move in the same direction, so that the plug rod 6 can be fully retracted into the plug rod installation groove 4; at this time, the first spring 7 is in a compressed state, and the first spring 7 generates a thrust for the plug rod 6 to extend out of the plug rod installation groove 4. After the knife holder 3 is inserted into the knife holder plug-in groove 24, when one end of the plug-in rod 6 needs to be inserted into the plug-in groove 5, it is only necessary to loosen the lever 9. Then, the plug 10 is inserted into the lever window 8 under the thrust of the first spring 7, so that one end of the plug-in rod 6 is inserted into the plug-in groove 5; then the plug block 10 is plugged back into the lever window 8, so that the plug block 10 blocks the open position of the lever window 8, thereby preventing debris from entering the plug-in rod installation groove 4 from the lever window 8 when the rotary tiller is working.

[0026] Embodiment 3: On the basis of Embodiment 2, in order to prevent the oil seal between the rotary tiller shaft 1 and the bearing seat 2 from being entangled by debris, the two ends of the rotary tiller shaft 1 are rotatably connected in two sets of bearing seats 2, an oil seal is sleeved on the surface of the rotary tiller shaft 1, and a cutting blade rotation groove 15 and a cutting blade disassembly groove 16 are provided on the surface of the bearing seat 2. The cutting blade rotation groove 15 is an annular groove body, one end of the cutting blade disassembly groove 16 is connected to the cutting blade rotation groove 15, and the other end of the cutting blade disassembly groove 16 is provided on the side of the bearing seat 2. A cutting blade 14 is slidably connected in the cutting blade rotation groove 15, and a cutting blade base 13 is fixed to the other end of the cutting blade 14, and the cutting blade base 13 is in a "U" shape. The cutting disc base 13 is sleeved on the surface of a group of rotary tiller blade seats 3 closest to the bearing seat 2, and the surfaces of the two side plates of the cutting disc base 13 are provided with pull rod grooves 20, and pull rods 22 are movably inserted in the pull rod grooves 20. One end of the two groups of pull rods 22 extending out of the pull rod grooves 20 is fixed with the same group of movable plates 17, and one end of the pull rods 22 extending into the pull rod grooves 20 is fixed with a spring plate 21, and a second spring 23 is sleeved on the rod body of the pull rod 22. A limiting rod 18 is fixed on the surface of the movable plate 17, and a limiting groove 19 is provided on the surface of a group of rotary tiller blade seats 3 sleeved with the cutting disc base 13, and the limiting rod 18 is movably inserted in the limiting groove 19.

[0027] A cutting piece base 13 is sleeved on a group of rotary tiller blade seats 3 near the bearing seat 2. A cutting piece rotary connection groove 15 is formed on the surface of the bearing seat 2. A cutting piece 14 is arranged between the cutting piece base 13 and the cutting piece rotary connection groove 15. The bearing seat 2 is fixed on the body of the rotary tiller. During tillage, the rotary tiller shaft 1 rotates relative to the bearing seat 2 driven by a motor arranged in the rotary tiller. The rotation of the rotary tiller shaft 1 drives each group of rotary tiller blade seats 3 to rotate. When the rotary tiller blade seats 3 rotate, they drive the rotary tiller blades 12 to till the land and at the same time drive the cutting piece 14 to rotate around the oil seal, so as to cut the sundries wound on the rotary tiller shaft 1 and near the oil seal position into pieces, and then the pieces fall on the cultivated land to prevent the sundries from winding into the oil seal. At the same time, when the cutting piece 14 needs to be replaced, only need to pull the moving plate 17 in the direction away from the cutting piece base 13, so that the limit rod 18 withdraws from the limit groove 19, then rotate the rotary tiller shaft 1 to align the cutting piece 14 with the cutting piece disassembly and assembly groove 16, and then one end of the old cutting piece 14 can be withdrawn from the cutting piece rotary connection groove 15 from the cutting piece disassembly and assembly groove 16, and the end of the cutting piece 14 fixed with the cutting piece base 13 is taken off upward from the top of the rotary tiller blade 12. When installing a new rotary tiller blade 12, pull the moving plate 17 in the direction away from the cutting piece base 13 again. When the moving plate 17 is pulled, it drives the pull rod 22 to extend out of the pull rod groove 20. The movement of the pull rod 22 drives the spring plate 21 to move in the same direction, so that the second spring 23 is compressed. Then the second spring 23 generates a thrust on the spring plate 21 in the direction of extending out of the pull rod groove 20. Then, the cutting piece base 13 is sleeved on the surface of the rotary tiller blade seat 3, and the end of the cutting piece 14 away from the cutting piece base 13 is inserted into the cutting piece rotary connection groove 15 from the cutting piece disassembly and assembly groove 16. When the limit rod 18 is aligned with the limit groove 19, release the moving plate 17. The spring plate 21 moves in the direction of extending out of the pull rod groove 20 under the thrust of the second spring 23, so that the limit rod 18 is inserted into the limit groove 19, and the cutting piece base 13 is limited on the surface of the rotary tiller blade seat 3, completing the replacement of the cutting piece 14.

[0028] In actual use, when a group of rotary tillers 12 cannot be used, it is only necessary to withdraw the connecting rod 6 arranged on the surface of the rotary tiller seat 3 below the group of rotary tillers 12 from the connecting groove 5, so that the group of rotary tillers 12 can be removed from the rotary tiller shaft 1 separately, and then the connecting rod 6 arranged on the surface of the rotary tiller seat 3 arranged at the bottom end of a new group of rotary tillers 12 is completely retracted into the connecting rod mounting groove 4, and then the rotary tiller seat 3 at the bottom end of the new group of rotary tillers 12 is inserted into the empty seat plug-in groove 24, and then one end of the connecting rod 6 is inserted into the plug-in groove 5, and the other end of the connecting rod 6 stays in the plug-in rod mounting groove 4, so that a single group of rotary tillers 12 that cannot be used can be replaced, avoiding that other groups that can still be used The rotary tiller 12 that can be used is wasted; when the plug rod 6 needs to be fully retracted into the plug rod installation groove 4, first pinch the pull block 11 to pull the plug block 10 out of the lever window 8, and then move the lever 9. The lever 9 slides in the lever window 8 in the direction of the vertical rod close to the rotary tiller blade seat 3, driving the plug rod 6 to move in the same direction, so that the plug rod 6 can be fully retracted into the plug rod installation groove 4; at this time, the first spring 7 is in a compressed state, and the first spring 7 generates a thrust for the plug rod 6 to extend out of the plug rod installation groove 4. After the rotary tiller blade seat 3 is inserted into the blade seat plug groove 24, when one end of the plug rod 6 needs to be inserted into the plug groove 5, it is only necessary to loosen the lever 9, and the plug rod 6 is pushed by the first spring 7 so that one end of the plug rod 6 is inserted into the plug groove 5. The plug block 10 is then inserted into the lever window 8 to block the open position of the lever window 8 to prevent debris from entering the plug rod installation groove 4 from the lever window 8 when the rotary tiller is working; a cutting disc base 13 is sleeved on a group of rotary tiller blade seats 3 close to the bearing seat 2, a cutting disc rotation groove 15 is provided on the surface of the bearing seat 2, and a cutting disc 14 is provided between the cutting disc base 13 and the cutting disc rotation groove 15. The bearing seat 2 is fixed on the body of the rotary tiller. When working, the rotary tiller shaft 1 rotates relative to the bearing seat 2 under the drive of the motor provided in the rotary tiller. The rotation of the rotary tiller shaft 1 drives each group of rotary tiller blade seats 3 to rotate. When the blade holder 3 rotates, it drives the rotary tiller 12 to till the soil, and drives the cutting blade 14 to rotate around the oil seal, so that the debris wrapped around the rotary tiller shaft 1 and close to the oil seal is cut into pieces, and then dropped on the cultivated land, so as to prevent the debris from being entangled in the oil seal; at the same time, when the cutting blade 14 needs to be replaced, it is only necessary to pull the moving plate 17 in the direction away from the cutting blade base 13, so that the limiting rod 18 is withdrawn from the limiting groove 19, and then the rotary tiller shaft 1 is rotated to align the cutting blade 14 with the cutting blade disassembly groove 16, and then one end of the old cutting blade 14 can be withdrawn from the cutting blade disassembly groove 16 to the cutting blade rotation groove 15, and the end of the cutting blade 14 fixed with the cutting blade base 13 is upwardly removed from the top of the rotary tiller 12;When installing the new rotary tillage blade 12, pull the moving plate 17 away from the cutting blade base 13 again. When the moving plate 17 is pulled, the pull rod 22 is driven to extend from the pull rod groove 20. The movement of the pull rod 22 drives the spring plate 21 to move in the same direction, so that the second spring 23 is compressed. Then, the second spring 23 generates a thrust on the spring plate 21 towards the extension of the pull rod groove 20. After that, the cutting blade base 13 is sleeved on the surface of the rotary tillage blade seat 3, and the end of the cutting blade 14 away from the cutting blade base 13 is inserted into the cutting blade rotary connection groove 15 from the cutting blade disassembly and assembly groove 16. When the limit rod 18 is aligned with the limit groove 19, release the moving plate 17. The spring plate 21 moves towards the extension of the pull rod groove 20 under the thrust of the second spring 23, so that the limit rod 18 is inserted into the limit groove 19, and the cutting blade base 13 is limited on the surface of the rotary tillage blade seat 3, completing the replacement of the cutting blade 14.;

[0029] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A rotary tiller shaft, comprising: A rotary tiller shaft (1) and a bearing seat (2), the two ends of the rotary tiller shaft (1) are rotatably connected in two groups of bearing seats (2), and an oil seal is sleeved on the surface of the rotary tiller shaft (1), characterized in that: a plurality of groups of blade seat plug-in grooves (24) are provided on the surface of the rotary tiller shaft (1), a rotary tiller blade seat (3) is movably plugged into the blade seat plug-in groove (24), a plug-in rod installation groove (4) is provided on the surface of the rotary tiller blade seat (3), one end of a plug-in rod (6) is movably plugged into the plug-in rod installation groove (4), the other end of the plug-in rod (6) is movably plugged into the plug-in groove (5), the plug-in groove (5) is provided on the inner wall of the blade seat plug-in groove (24), and a rotary tiller blade (12) is fixed to the top of the rotary tiller blade seat (3).

2. A rotary tiller shaft according to claim 1, characterized in that: A first spring (7) is fixed between one end of the plug-in rod (6) extending into the plug-in rod installation groove (4) and the inner wall of the plug-in rod installation groove (4).

3. A rotary tiller shaft according to claim 2, characterized in that: The rotary tiller blade seat (3) is in an "L"-shaped plate-like structure. A lever window (8) is provided at one end of a horizontal plate of the rotary tiller blade seat (3) extending out of the blade seat plug-in slot (24). A lever (9) is slidably connected in the lever window (8). One end of the lever (9) is fixed on the surface of the plug-in rod (6), and the other end of the lever (9) extends out of the lever window (8).

4. A rotary tiller shaft according to claim 3, characterized in that: A plug block (10) is movably inserted in the lever window (8), and a pull block (11) is fixed to one end of the plug block (10) extending out of the lever window (8).

5. The rotary tiller shaft according to claim 1, characterized in that: The surface of the bearing seat (2) is provided with a cutting blade rotation groove (15) and a cutting blade disassembly groove (16); the cutting blade rotation groove (15) is an annular groove body; one end of the cutting blade disassembly groove (16) is connected to the cutting blade rotation groove (15); the other end of the cutting blade disassembly groove (16) is provided on the side of the bearing seat (2); a cutting blade (14) is slidably connected in the cutting blade rotation groove (15); a cutting blade base (13) is fixed to the other end of the cutting blade (14); the cutting blade base (13) is in a "U"-shaped plate structure; the cutting blade base (13) is sleeved on the surface of a group of rotary tiller blade seats (3) closest to the bearing seat (2).

6. The rotary tiller shaft according to claim 5, characterized in that: The surfaces of the two side plates of the cutting blade base (13) are provided with pull rod grooves (20), and pull rods (22) are movably inserted in the pull rod grooves (20). One end of the two groups of pull rods (22) extending out of the pull rod grooves (20) is fixed with the same group of movable plates (17), and one end of the pull rods (22) extending into the pull rod grooves (20) is fixed with a spring plate (21), and a second spring (23) is sleeved on the rod body of the pull rod (22).

7. The rotary tiller shaft according to claim 6, characterized in that: A limiting rod (18) is fixed on the surface of the movable plate (17), and a limiting groove (19) is provided on the surface of a group of rotary tiller blade seats (3) sleeved with a cutting blade base (13), and the limiting rod (18) is movably inserted in the limiting groove (19).

8. A rotary tiller, characterized in that: The rotary tiller shaft comprises the rotary tiller shaft as described in any one of claims 1 to 7.