A labor-saving harrowing device suitable for small plots of land

Abstract

This utility model belongs to the field of agricultural machinery technology, and particularly relates to a labor-saving harrowing device suitable for small plots of land. Addressing the problem that existing harrows have fixed tooth spacing, making them unsuitable for diverse working conditions in agriculture and landscaping, and requiring workers to carry multiple harrow models, increasing labor and financial costs, the following solution is proposed: a labor-saving harrowing device suitable for small plots, including a retractable sleeve; one end of the retractable sleeve is equipped with harrow teeth, which are detachably connected to one end of the retractable sleeve. The advantages of this utility model are: the detachable multi-tooth spacing harrow teeth can be quickly replaced through a plug-in structure without tools, adapting to different weeding and soil turning needs, avoiding the cumbersome carrying of multiple harrows, reducing transportation and replacement time, and the limit beads and positioning arc grooves, combined with springs, automatically lock to ensure a stable connection. The adjusting rod, through guide blocks, guide grooves, and open clamps, allows for handrail height adjustment, conforming to body height, reducing fatigue from bending and lifting arms, and improving working comfort.

Description

Technical Field

[0001] This utility model relates to a harrowing device, specifically a labor-saving harrowing device suitable for small plots of land, belonging to the field of agricultural machinery technology. Background Technology

[0002] During field operations, different crops require different tillage and land preparation methods depending on their sowing and cultivation characteristics. Harrowing is necessary after plowing, before sowing, or during early spring moisture retention.

[0003] In the prior art, such as the hand-push harrowing device disclosed in announcement number CN204244653U, the device has the advantages of simple structure, low cost, light weight, easy operation, and adjustable harrowing depth. It is suitable for small areas of land such as hillsides and gullies, as well as for large areas of land for land preparation, soil breaking and debris removal. However, the above-mentioned prior art has the following shortcomings: When the above-mentioned harrowing device is used, the spacing between the rake teeth is fixed, which cannot adapt to different weed and impurity densities, soil textures and vegetation densities in various working scenarios such as agricultural land preparation and landscaping. In order to cope with different working conditions, the staff need to prepare multiple rakes of different models, which increases the cost of manpower and financial resources. Summary of the Invention

[0004] The purpose of this invention is to provide a labor-saving harrowing device suitable for small plots of land, which solves the problem that the fixed spacing of the rake teeth in the above-mentioned devices makes it difficult to adapt to diverse working conditions in agriculture, landscaping and other scenarios, and requires workers to carry multiple models of rakes, increasing manpower and financial costs.

[0005] This utility model achieves the above-mentioned objective through the following technical solution: a labor-saving harrowing device suitable for small plots of land, including a retractable sleeve;

[0006] One end of the shrink sleeve is provided with rake teeth, which are detachably connected to one end of the shrink sleeve. An adjusting rod is slidably connected inside the other end of the shrink sleeve, and a handle is fixedly installed on one end of the adjusting rod.

[0007] There are many types of rake teeth, and the tooth spacing of each type of rake tooth is different.

[0008] As a further embodiment of this utility model: a plug rod is fixedly installed at one end of the rake teeth, and a plug groove adapted to the plug rod is opened at one end of the shrink sleeve. A limit bead sliding hole is opened in an annular shape on the surface of the shrink sleeve near the plug rod. Limit beads slide in several limit bead sliding holes. A pressure sleeve is slidably connected to the surface of the shrink sleeve, and several limit beads abut against the inner wall of the pressure sleeve. A positioning arc groove is opened in an annular shape on the surface of the plug rod.

[0009] As a further embodiment of this utility model: a fixing ring is fixedly installed on the surface of the shrink sleeve, and a pressure sleeve is slidably connected to the outside of the fixing ring. A spring is provided on the surface of the shrink sleeve located inside the pressure sleeve. One end of the spring abuts against the bottom surface of the fixing ring, and the other end of the spring abuts against the inner side wall of the pressure sleeve.

[0010] As a further improvement of this utility model: an installation block is fixedly installed in the insertion slot, and an installation slot adapted to the installation block is opened inside one end of the insertion rod.

[0011] As a further improvement of this utility model, the inner surface of the pressure sleeve is provided with a disassembly and assembly arc groove.

[0012] As a further embodiment of this utility model: a strip-shaped opening is provided on the outer surface of the end of the retractable sleeve near the handrail, and an open clamp is fitted on the outer surface of the end of the retractable sleeve near the handrail. A screw rod passes through the opening of the open clamp, a nut is threaded to one end of the screw rod, and a locking buckle is hinged to the other end of the screw rod. A pressure pad is abutted on one side of the locking buckle, and the pressure pad is fitted on the outside of the screw rod.

[0013] As a further embodiment of this utility model: the inner wall of the shrink sleeve is integrally formed with a guide block, and the surface of the adjusting rod is provided with a guide groove that matches the guide block. The adjusting rod is slidably connected to one end of the shrink sleeve through the guide block and the guide groove.

[0014] As a further improvement of this utility model: a U-shaped frame is bolted to the outside of the shrink sleeve, and an auxiliary ground wheel is rotatably connected inside the U-shaped frame.

[0015] The beneficial effects of this utility model are:

[0016] I. In this utility model, by setting up a retractable sleeve, handle, auxiliary ground wheel, rake teeth, opening clip, locking buckle, limit bead, pressure sleeve, disassembly arc groove, limit bead sliding hole, plug groove and positioning arc groove, etc., the rake teeth with multiple tooth pitches can be quickly replaced through the plug structure. It can adapt to the needs of weed clearing and soil turning of different densities without tools, avoiding the cumbersomeness of carrying multiple traditional fixed tooth pitch rakes, reducing the time for tool handling and replacement. The limit bead and positioning arc groove are automatically locked with spring to ensure that the rake teeth are firmly connected and not easy to fall off. The installation block and slot restrict circumferential rotation and prevent the rake teeth from being misaligned due to torque rotation during operation, ensuring that the direction of soil breaking and weeding is accurate and consistent.

[0017] Second, in this utility model, the adjusting rod is guided by the guide block and guide groove and locked by the open clamp, which can flexibly adjust the height of the handrail according to the user's height, reduce fatigue from bending over or raising the arm, and improve the comfort of long-term operation. The cooperation between the guide block and the guide groove restricts the circumferential rotation of the adjusting rod, ensuring that the handrail is always horizontal and stable. Even if the device is pushed or pulled with great force, it is not easy to deviate, making the operation smoother and more convenient.

[0018] Third, in this utility model, the auxiliary ground wheel transforms traditional sliding friction into rolling friction, significantly reducing the resistance to movement. The device can be easily pushed by a single person, making it especially suitable for scenarios with limited physical strength or long-term operation. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the locking buckle, opening clamp, guide block and screw structure in this utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the rake teeth, the insertion rod, and the retractable sleeve in this utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the fixing ring, mounting block, and positioning arc groove in this utility model;

[0023] Figure 5 In this utility model Figure 3 Enlarged schematic diagram of the structure at point A in the diagram.

[0024] In the diagram: 1. Shrink sleeve; 2. Adjusting rod; 3. Handrail; 4. U-shaped frame; 5. Auxiliary ground wheel; 6. Rake teeth; 7. Insert rod; 8. Opening clamp; 10. Strip opening; 11. Guide block; 12. Guide groove; 13. Screw; 14. Pressure pad; 15. Locking buckle; 16. Nut; 17. Limiting bead; 18. Fixing ring; 19. Spring; 20. Pressure sleeve; 21. Disassembly arc groove; 22. Mounting block; 23. Limiting bead sliding hole; 24. Inserting groove; 25. Mounting slot; 26. Positioning arc groove. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Example 1

[0027] like Figures 1 to 5 As shown, a labor-saving harrowing device suitable for small plots of land includes a retractable sleeve 1;

[0028] One end of the shrink sleeve 1 is provided with rake teeth 6, which are detachably connected to one end of the shrink sleeve 1. An adjusting rod 2 is slidably connected inside the other end of the shrink sleeve 1, and a handle 3 is fixedly installed on one end of the adjusting rod 2.

[0029] There are various types of rake teeth 6, and the tooth pitch of each type of rake tooth 6 is different.

[0030] Traditional fixed-pitch rakes may require carrying multiple rakes with different pitches to cope with different working conditions. However, detachable rakes with various pitches only require changing the rake teeth according to actual needs, eliminating the need to carry multiple tools, reducing the time cost of tool transportation and replacement, and improving work efficiency.

[0031] Furthermore, a connector rod 7 is fixedly installed at one end of the rake tooth 6, and a connector groove 24 adapted to the connector rod 7 is opened at one end of the shrink sleeve 1. A limit bead sliding hole 23 is opened in an annular shape on the surface of the shrink sleeve 1 near the connector rod 7. A limit bead 17 slides in several limit bead sliding holes 23. A pressure sleeve 20 is slidably connected to the surface of the shrink sleeve 1, and several limit beads 17 abut against the inner wall of the pressure sleeve 20. A positioning arc groove 26 is opened in an annular shape on the surface of the connector rod 7.

[0032] The rake teeth 6 can be locked and disassembled by sliding the pressure sleeve 20. When the pressure sleeve 20 is slid upward, the inclined surface of the inner wall of the pressure sleeve 20 pushes the limiting bead 17 into the limiting bead sliding hole 23, releasing the limit on the plug rod 7, and the old rake teeth 6 can be pulled out. When installing the new rake teeth 6, simply insert the plug rod 7 and loosen the pressure sleeve 20. The spring 19 returns to its original position and pushes the pressure sleeve 20, and the limiting bead 17 automatically engages with the positioning arc groove 26 to complete the locking. No tools are required throughout the process, which significantly shortens the tooth replacement time. In small plots, the rake teeth 6 can be quickly switched according to different usage needs, avoiding the tedious process of repeatedly tightening and loosening traditional bolt fixing, and improving the continuity of operation.

[0033] Furthermore, a fixing ring 18 is fixedly installed on the surface of the shrink sleeve 1, and the pressure sleeve 20 is slidably connected to the outside of the fixing ring 18. A spring 19 is provided on the surface of the shrink sleeve 1 located inside the pressure sleeve 20. One end of the spring 19 abuts against the bottom surface of the fixing ring 18, and the other end of the spring 19 abuts against the inner wall of the pressure sleeve 20.

[0034] When the pressure sleeve 20 is slid upward to remove the rake tooth 6, the spring 19 is compressed and stores elastic potential energy. After the pressure sleeve 20 is released, the spring 19 releases its potential energy to push the pressure sleeve 20 to automatically reset, ensuring that the limit bead 17 always presses against the positioning arc groove 26, improving the stability of the connection and preventing the rake tooth 6 from falling off due to loosening.

[0035] Furthermore, an installation block 22 is fixedly installed inside the insertion slot 24, and an installation slot 25 adapted to the installation block 22 is opened inside one end of the insertion rod 7.

[0036] When the rake tooth 6 is inserted into the insertion slot 24, the mounting block 22 is fully embedded in the mounting slot 25, which restricts the circumferential rotation of the rake tooth 6 and prevents the rake tooth 6 from rotating out of position due to torque, ensuring that the direction of the rake tooth 6 is always consistent with the working direction.

[0037] Furthermore, the inner surface of the pressure sleeve 20 is provided with a disassembly and assembly arc groove 21.

[0038] Example 2

[0039] Improvements based on Example 1:

[0040] Furthermore, a strip-shaped opening 10 is provided on the outer surface of the end of the retractable sleeve 1 near the handrail 3, and an open clamp 8 is fitted on the outer surface of the end of the retractable sleeve 1 near the handrail 3. A screw 13 passes through the opening of the open clamp 8. A nut 16 is threaded to one end of the screw 13, and a locking buckle 15 is hinged to the other end of the screw 13. A pressure pad 14 abuts against one side of the locking buckle 15, and the pressure pad 14 is fitted on the outside of the screw 13.

[0041] When the nut 16 is tightened, the open clamp 8 contracts and squeezes the two sides of the strip opening 10, causing the inner wall of the shrink sleeve 1 to deform and grip the adjusting rod 2. Users of different heights can quickly adjust the handle 3 to the optimal grip height, reducing fatigue from bending over or raising their arms and improving work comfort.

[0042] Furthermore, the inner wall of the shrink sleeve 1 is integrally formed with a guide block 11, and the surface of the adjusting rod 2 is provided with a guide groove 12 that matches the guide block 11. The adjusting rod 2 is slidably connected to one end of the shrink sleeve 1 through the guide block 11 and the guide groove 12.

[0043] The cooperation between the guide block 11 and the guide groove 12 completely restricts the circumferential rotation of the adjustment rod 2. Even when the device is pushed or pulled with great force, the armrest 3 always remains horizontal, preventing changes in grip posture due to rotation and reducing wrist and arm fatigue.

[0044] Furthermore, a U-shaped frame 4 is bolted to the outside of the shrink sleeve 1, and an auxiliary ground wheel 5 is rotatably connected inside the U-shaped frame 4.

[0045] The auxiliary ground wheel 5 transforms the sliding friction of traditional harrowing into rolling friction, significantly reducing travel resistance. A single person can easily push the device, reducing physical exertion, making it especially suitable for long-term operations.

[0046] Working principle: Manually slide the pressure sleeve 20 upward to compress the spring 19. At this time, the disassembly and assembly arc groove 21 on the inner wall of the pressure sleeve 20 is aligned with the limit bead sliding hole 23 on the shrink sleeve 1. The limit bead 17 is pushed into the limit bead sliding hole 23 by the pressure sleeve 20, releasing the lock on the plug rod 7. Then, pull the plug rod 7 of the old rake tooth 6 out of the plug groove 24 of the shrink sleeve 1 to complete the disassembly.

[0047] The engagement of the mounting block 22 and the mounting slot 25 prevents the rake teeth 6 from rotating circumferentially during operation, ensuring that they are pulled out axially during disassembly.

[0048] Select the new rake tooth 6 with the required tooth pitch, insert its insertion rod 7 into the insertion groove 24 of the shrink sleeve 1, so that the mounting block 22 is engaged in the mounting groove 25, release the pressure sleeve 20, the spring 19 pushes the pressure sleeve 20 to reset, the inner wall of the pressure sleeve 20 squeezes the limiting bead 17, so that part of it pops out of the limiting bead sliding hole 23 and is engaged in the positioning arc groove 26 on the surface of the insertion rod 7, so as to achieve a firm installation of the new rake tooth 6;

[0049] Loosen the nut 16, and the open clamp 8 will be released under the action of the screw 13 and the locking buckle 15. The strip opening 10 on the shrink sleeve 1 will return to its original state, and the adjusting rod 2 will no longer be held tightly and can slide freely.

[0050] The cooperation between the guide block 11 and the guide groove 12 ensures that the adjusting rod 2 slides linearly within the shrink sleeve 1, preventing rotation;

[0051] Depending on the user's height or work requirements, the adjustment rod 2 can be pulled to slide within the retractable sleeve 1 to adjust the height of the handrail 3. Taller users can pull the adjustment rod 2 out longer to make the handrail 3 more comfortable to operate in, while shorter users can shorten the extension length of the adjustment rod 2.

[0052] After adjusting to the appropriate length, tighten the nut 16, tighten the open clamp 8, close the strip opening 10, tighten the inner wall of the shrink sleeve 1 to hold the adjusting rod 2, and increase the friction of the pressure pad 14 to prevent the adjusting rod 2 from sliding during operation and ensure that the height is fixed.

[0053] When using the device, the user holds the handle 3 and pushes the device forward. The auxiliary ground wheel 5 rolls on the U-shaped frame 4, providing support and ease of movement. The rake teeth 6 contact the ground to turn over the soil and clear debris. By changing the rake teeth 6 with different tooth pitches, it can adapt to different working scenarios. By adjusting the length of the adjusting rod 2, it can adapt to the operating habits of users of different heights, reduce labor intensity, and improve work efficiency.

[0054] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0055] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A labor-saving harrowing device suitable for small plots of land, comprising a retractable sleeve (1); characterized in that: One end of the shrink sleeve (1) is provided with a rake tooth (6), the rake tooth (6) is detachably connected to one end of the shrink sleeve (1), and an adjusting rod (2) is slidably connected inside the other end of the shrink sleeve (1). A handrail (3) is fixedly installed on one end of the adjusting rod (2). The rake teeth (6) come in various types, and the tooth pitch of the various types of rake teeth (6) is different.

2. The labor-saving harrowing device for small plots of land according to claim 1, characterized in that: One end of the rake tooth (6) is fixedly installed with a plug rod (7), and one end of the shrink sleeve (1) is provided with a plug groove (24) that matches the plug rod (7). The surface of the shrink sleeve (1) near the plug rod (7) is provided with a ring-shaped limit bead sliding hole (23). Limit beads (17) slide in several of the limit bead sliding holes (23). A pressure sleeve (20) is slidably connected to the surface of the shrink sleeve (1). Several limit beads (17) abut against the inner wall of the pressure sleeve (20). The surface of the plug rod (7) is provided with a ring-shaped positioning arc groove (26).

3. The labor-saving harrowing device for small plots of land according to claim 2, characterized in that: A fixing ring (18) is fixedly installed on the surface of the shrink sleeve (1). The pressure sleeve (20) is slidably connected to the outside of the fixing ring (18). A spring (19) is provided on the surface of the shrink sleeve (1) located inside the pressure sleeve (20). One end of the spring (19) abuts against the bottom surface of the fixing ring (18), and the other end of the spring (19) abuts against the inner wall of the pressure sleeve (20).

4. The labor-saving harrowing device for small plots of land according to claim 2, characterized in that: An installation block (22) is fixedly installed inside the insertion slot (24), and an installation slot (25) adapted to the installation block (22) is opened inside one end of the insertion rod (7).

5. The labor-saving harrowing device for small plots of land according to claim 2, characterized in that: The inner surface of the pressure sleeve (20) is provided with a disassembly and assembly arc groove (21).

6. The labor-saving harrowing device for small plots of land according to claim 1, characterized in that: The retractable sleeve (1) has a strip-shaped opening (10) on the outer surface of one end near the handrail (3), and an open clamp (8) is fitted on the outer surface of the retractable sleeve (1) near the handrail (3). A screw (13) passes through the opening of the open clamp (8). A nut (16) is threaded to one end of the screw (13), and a locking buckle (15) is hinged to the other end of the screw (13). A pressure pad (14) abuts against one side of the locking buckle (15), and the pressure pad (14) is fitted on the outside of the screw (13).

7. The labor-saving harrowing device for small plots of land according to claim 1, characterized in that: The inner wall of the shrink sleeve (1) is integrally formed with a guide block (11), and the surface of the adjusting rod (2) is provided with a guide groove (12) that matches the guide block (11). The adjusting rod (2) is slidably connected to one end of the shrink sleeve (1) through the guide block (11) and the guide groove (12).

8. The labor-saving harrowing device for small plots of land according to claim 1, characterized in that: The outer side of the shrink sleeve (1) is bolted with a U-shaped frame (4), and the inside of the U-shaped frame (4) is rotatably connected with an auxiliary ground wheel (5).

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