Rotary cultivator

Abstract

The utility model discloses a rotary cultivator, relates to the field of farming machinery, and aims to solve the problems that when a blade of a rotary cultivator is replaced by people, fixed parts are more and are not easy to replace, the rotary cultivator is characterized by comprising a rotating shaft and the blade, a flange is arranged on the rotating shaft, a blade groove is formed in the flange, a magnetic attraction part is arranged on the bottom surface of the blade groove, and an attaching part is arranged on the blade. The depth of the cutter groove is equal to the thickness of the blade. After the rotary cultivator is used by people, the damaged degree of each blade is checked, the blade needing to be replaced is determined, after people detach the blade needing to be replaced, the blade needing to be replaced can be attracted to the magnetic attraction part through the attaching part, at the moment, the blade is attracted by the magnetic attraction part and well fixed to the flange in advance, and the blade needing to be replaced can be replaced. At the moment, people can loosen the hand holding the blade to carry out the blade fixing operation in the next step, due to the arrangement, people do not need to hold the blade with the hand all the time when installing a new blade, and the blade made of high-speed steel has the long service life.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery, and more specifically, to a rotary tiller. Background Technology

[0002] A rotary tiller, also known as a rotary tiller, is a tillage machine that works with a tractor to perform tilling and harrowing operations. A rotary tiller typically consists of a shell, a shaft, and blades fixedly connected to the shaft. To reduce vibration during tilling, the blades are usually arranged in a spiral shape. Rotary tillers are widely used because they have strong soil-breaking ability and produce a flat surface after tilling. At the same time, rotary tillers can chop up stubble buried below the surface, making it easier for seeders to operate and providing a good seedbed for later sowing.

[0003] During the operation of a rotary tiller, the blades come into direct contact with the soil. To ensure the stability of the blades, two bolts are usually used to fix each blade. As the rotary tiller moves, the blades will collide with gravel and other hard objects mixed in the soil. Such collisions can easily damage the blades. Therefore, people need to check the blades of the rotary tiller after each use.

[0004] When the damaged blade is near the inside of the rotary tiller, people need to crawl inside to replace it. To replace the blade, people first need to unscrew two bolts, then remove the blade from the shaft. When installing the new blade on the shaft, one hand needs to hold the blade while the other hand passes the bolt through the blade, and then the nut is fixed to the bolt to complete the blade's fixation, which is very inconvenient.

[0005] Therefore, a new solution is needed to address this problem. Utility Model Content

[0006] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a rotary tiller.

[0007] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a rotary tiller, including a rotating shaft and blades fixed on the rotating shaft, the rotating shaft is provided with a plurality of flanges, each of the flanges is provided with a groove for mounting the blades, the bottom surface of the groove is provided with a magnetic attraction part, the blade is provided with a fitting part for being attracted by the magnetic attraction part, and the depth of the groove is equal to the thickness of the blade.

[0008] By adopting the above technical solution, after people finish using the rotary tiller, they can check the damage of each blade to determine which blades need to be replaced. After removing the blades to be replaced, the new blades can be attached to the magnetic part through the bonding part. At this time, the blades are attracted by the magnetic part and are well pre-fixed to the flange. At this time, people can release their hands from holding the blades and proceed to the next step of blade fixing. This setting allows people to install new blades without having to hold the blades with their hands all the time.

[0009] The present invention is further configured such that: the blade has a through hole and the magnetic suction part has a threaded hole; when the fitting part is fitted with all the inner walls of the blade groove, the center line of the through hole coincides with the center line of the threaded hole.

[0010] By adopting the above technical solution, after people attach the new blade to the blade groove, they only need to align the threaded hole with the through hole after the blade is in contact with all the inner walls of the blade groove. There is no need to spend time aligning the through hole with the threaded hole. This allows people to fix the new blade with one hand, which greatly improves the efficiency of blade installation.

[0011] The present invention is further configured such that: the flange is rotatably connected to the rotating shaft, and the flange is provided with a retaining ring for fixing to the rotating shaft.

[0012] By adopting the above technical solution, the flange is rotatably connected to the shaft. When it is necessary to replace the blades that are not easily accessible by hand, the damaged blades can be rotated to a place that is easily accessible by hand by rotating the flange, so that it is easier for people to replace the blades. The setting of the fixing ring allows the flange to be well fixed on the shaft, and the flange and the shaft will not rotate relative to each other when people use the rotary tiller.

[0013] The present invention is further configured such that: a rotating groove is provided on the outer peripheral wall of the rotating shaft, the flange is rotatably connected in the rotating groove, and the side wall of the rotating groove abuts against the side wall of the flange.

[0014] By adopting the above technical solution, when people rotate the flange, the side wall of the flange abuts against the side wall of the rotating groove. The rotating groove plays a limiting role in the movement of the flange in the length direction of the rotating shaft, making it difficult for the flange to move relative to the shaft. This better ensures the relative position of the flange on the rotating shaft, and provides a better positioning effect for people to fix the flange on the rotating shaft later.

[0015] The present invention is further configured such that: a through hole is formed on the outer peripheral wall of the rotating shaft, an internal thread is formed on the inner wall of the through hole, a circular hole is formed on the fixing ring, and a screw passes through the circular hole and the through hole together.

[0016] By adopting the above technical solution, when people need to fix the flange to the shaft by the fixing ring after replacing the blade, the screw can be screwed into the hole after passing through the round hole. The internal thread formed on the inner wall of the hole can mesh well with the external thread on the screw, making it difficult for the screw to come out of the hole. The outer wall of the screw abuts against the inner wall of the round hole, thus making it difficult for the fixing ring and the shaft to rotate relative to each other.

[0017] The present invention is further configured such that: a friction plane is provided on the outer peripheral wall of the fixing ring, and the circular hole is opened on the friction plane.

[0018] By adopting the above technical solution, the opening of the friction surface allows the bottom surface of the screw head to fit well with the friction surface when the screw is passed through the round hole and screwed into the hole. This increases the contact area between the screw and the fixing ring, thereby increasing the friction between the screw and the fixing ring and ensuring the connection stability between the screw and the fixing ring.

[0019] The present invention is further configured such that the number of perforations is several, and the several perforations are distributed in a linear array along the length of the rotating shaft.

[0020] By adopting the above technical solution, the perforations are arranged in a linear array so that when the shaft stops rotating, all the perforations are in the same plane. The perforations being in the same plane make it easier for people to unscrew the screws in the perforations, and then rotate the flange and replace the blade.

[0021] The present invention is further configured such that: the bonding part is made of cast iron, and the blade is made of high-speed steel.

[0022] By adopting the above technical solution, cast iron can be well attracted by magnets, so that the bonding part made of cast iron can be well attracted by the magnetic attraction part. High-speed steel has the characteristics of high wear resistance, and the blade made of high-speed steel has a long service life.

[0023] In summary, this utility model has the following beneficial effects: After using the rotary tiller, the damage level of each blade is checked to determine which blades need to be replaced. After removing the blades to be replaced, the new blades can be attached to the magnetic suction part through the fitting part. At this time, the blades are attracted and fixed well by the magnetic suction part, and the user can release their hand from holding the blades to proceed with the next blade fixing operation. This design allows a structure on the flange to pre-fix the blades when installing new blades, so that the user does not need to hold the blades with their hands all the time. When it is necessary to replace blades that are not easily accessible by hand, the screws in the through holes can be loosened, and then the user can rotate the flange to move the damaged blades to a place that is easily accessible by hand, so that the user can easily replace blades in different positions on the flange. The design of the fixing ring allows the flange to be fixed well on the rotating shaft. Attached Figure Description

[0024] Figure 1 This is a partial structural schematic diagram of the present invention;

[0025] Figure 2 This is a partial structural diagram of the rotating shaft in this utility model, used to illustrate the assembly of the flange and the rotating shaft;

[0026] Figure 3 This is an exploded view of the flange in this utility model, used to illustrate the fit between the knife groove and the blade.

[0027] In the diagram: 1. Shaft; 2. Blade; 3. Flange; 4. Tool groove; 5. Through hole; 6. Threaded hole; 7. Retaining ring; 8. Rotating groove; 9. Through hole; 10. Round hole; 11. Friction surface. Detailed Implementation

[0028] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0029] Rotary tillers, such as Figure 1 and Figure 3 As shown, the device includes a housing, a rotating shaft 1 enclosed by the housing, and a blade 2 fixed on the rotating shaft 1. Turntables are welded to both ends of the rotating shaft 1, and the rotating shaft 1 is rotatably connected to both ends of the housing via the turntables. The housing has an inspection port. The rotating shaft 1 has several flanges 3, and each flange 3 has a groove 4 for mounting the blade 2. A magnetic suction part is fixedly connected to the bottom surface of the groove 4 by bolts. The size of the magnetic suction part is equal to the size of the side wall of the groove 4. The blade 2 has an integrally formed fitting part for being attracted by the magnetic suction part. The size of the fitting part is the same as the size of the magnetic suction part. The depth of the groove 4 is equal to the thickness of the blade 2. The blade 2 has a through hole 5 located on the fitting part. The magnetic suction part has a threaded hole 6. When the fitting part is in contact with all the inner walls of the groove 4, the center line of the through hole 5 coincides with the center line of the threaded hole 6.

[0030] like Figure 2 and Figure 3 As shown, flange 3 has a circular groove for the shaft 1 to pass through, flange 3 is rotatably connected to shaft 1, flange 3 has an integrally formed retaining ring 7 for fixing to shaft 1, the outer peripheral wall of shaft 1 has a rotating groove 8, the inner peripheral wall of the circular groove abuts against the outer peripheral wall of the rotating groove 8, the side wall of the rotating groove 8 abuts against the side wall of flange 3, the outer peripheral wall of shaft 1 has a through hole 9, the inner wall of the through hole 9 has an internal thread, the retaining ring 7 has a circular hole 10, the circular hole 10 and the through hole 9 both have a screw passing through, the outer peripheral wall of retaining ring 7 has a friction surface 11, the circular hole 10 is formed on the friction surface 11, the number of through holes 9 is several, the several through holes 9 are distributed in a linear array along the length of shaft 1, the fitting part is made of cast iron, and the blade 2 is made of high speed steel.

[0031] Working Process: After using the rotary tiller, turn it off. Once the shaft 1 stops rotating, check the position of the perforations 9 on the shaft 1 through the inspection port. If the perforations 9 are not facing the inspection port, rotate the shaft 1 to face the perforations 9 towards the inspection port. The perforations 9 are arranged in a linear array along the length of the shaft 1, ensuring all perforations 9 are in the same plane. This makes it easier to unscrew the bolts in the perforations 9. Observe and determine which blade 2 needs to be replaced. After determining which blade 2 needs to be replaced, open the inspection port on the outer casing to enter the rotary tiller. First, unscrew the bolts on the blade 2 that needs to be replaced from the threaded holes 6. Then, manually remove the blade 2 that needs to be replaced. The old blade 2 is pulled out of the blade groove 4, and then the new blade 2 is inserted into the blade groove 4. At this time, the fitting part on the blade 2 is attracted by the magnetic part, so that the new blade 2 can be well pre-fixed on the flange 3. The blade 2 is not easy to detach from the flange 3, so people do not need to fix it by hand. Then, people only need to fit the blade 2 against all the inner walls of the blade groove 4. At this time, the through hole 5 is aligned with the threaded hole 6. Then, people can directly screw the bolt through the through hole 5 into the threaded hole 6 by hand, so that people do not need to spend time aligning the through hole 5 with the threaded hole 6. People can fix the new blade 2 with one hand, which greatly improves the efficiency of installing the blade 2. Then, use a wrench to tighten the bolt so that the blade 2 will not detach from the flange 3.

[0032] When it's time to replace the blade 2 facing away from the inspection port, which is located relatively deep inside the rotary tiller and inconvenient for the operator to reach the bolts, the operator can first unscrew the screws on the retaining ring 7. The inner wall of the circular hole 10 will no longer be in contact with the outer wall of the screw. The operator can then rotate the flange 3 along the rotating groove 8. When the blade 2 to be replaced is rotated in front of it, the operator can unscrew the bolts from the threaded hole 6 and then pull the blade 2 out of the blade groove 4, allowing it to rotate relative to the rotating shaft 1. The flange 3 allows for easy replacement of the blade 2 at any position on the flange 3 without rotating the shaft 1. The opening of the rotating groove 8 causes the side wall of the flange 3 to abut against the side wall of the rotating groove 8. The rotating groove 8 limits the movement of the flange 3 along the length of the shaft 1, making it difficult for the flange 3 to move relative to the shaft 1, thus better ensuring the relative position of the flange 3 on the shaft 1. After installing the new blade 2, the flange 3 can be rotated back, and the round hole 10 can be aligned with the through hole 9. After passing the screw through the round hole 10, it is screwed into the through hole 9. The screw head is then pressed tightly against the friction surface 11 to secure the flange 3 to the rotating shaft 1. The internal thread formed on the inner wall of the through hole 9 engages well with the external thread of the screw, making it difficult for the screw to come out of the through hole 9. The outer wall of the screw abuts against the inner wall of the round hole 10, thus preventing relative rotation between the retaining ring 7 and the rotating shaft 1. The friction surface 11 ensures that when the screw is passed through the round hole 10 and screwed into the through hole 9, the bottom of the screw head... The surface can better fit with the friction surface 11, which increases the contact area between the screw head and the retaining ring 7, and increases the friction between the screw and the retaining ring 7, thus ensuring the connection stability between the screw and the retaining ring 7. The cast iron can be well attracted by the magnet, so that the fitting part made of cast iron can be well attracted by the magnetic part, thus allowing the blade 2 to be well pre-fixed in the blade groove 4. High-speed steel has the characteristics of high wear resistance, and the blade 2 made of high-speed steel has a long service life.

[0033] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A rotary cultivator comprising a rotating shaft (1) and blades (2) fixed to the rotating shaft (1), characterized in that: The rotary shaft (1) is provided with a plurality of flanges (3), a plurality of the flanges (3) are provided with a cutter slot (4) for mounting a cutter blade (2), the bottom surface of the cutter slot (4) is provided with a magnetic attraction part, the cutter blade (2) is provided with a matching part for being attracted by the magnetic attraction part, the depth of the cutter slot (4) is equal to the thickness of the cutter blade (2).

2. The rotary cultivator of claim 1, characterized in that: The cutter blade (2) is provided with a through hole (5), the magnetic attraction part is provided with a threaded hole (6), when the matching part is matched with all the inner walls of the cutter slot (4), the center line of the through hole (5) coincides with the center line of the threaded hole (6).

3. The rotary cultivator of claim 1, characterized in that: The flange (3) is rotationally connected to the rotary shaft (1), and the flange (3) is provided with a fixing ring (7) for fixing the rotary shaft (1).

4. The rotary cultivator of claim 3, characterized in that: The outer peripheral wall of the rotary shaft (1) is provided with a rotation slot (8), the flange (3) is rotationally connected in the rotation slot (8), and the side wall of the rotation slot (8) abuts against the side wall of the flange (3).

5. The rotary cultivator of claim 4, characterized in that: The outer peripheral wall of the rotary shaft (1) is provided with a through hole (9), the inner wall of the through hole (9) is formed with an internal thread, the fixing ring (7) is provided with a circular hole (10), and the circular hole (10) and the through hole (9) are penetrated by a screw.

6. The rotary cultivator of claim 5, characterized in that: The outer peripheral wall of the fixing ring (7) is provided with a friction plane (11), and the circular hole (10) is provided on the friction plane (11).

7. The rotary cultivator of claim 6, characterized in that: The number of the through holes (9) is several, and the several through holes (9) are linearly arranged along the length direction of the rotary shaft (1).

8. The rotary cultivator of claim 1, characterized in that: The matching part is made of cast iron, and the cutter blade (2) is made of high-speed steel.

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