Folding sickle convenient for replacing sickle head

Abstract

The utility model relates to the field of sickles, in particular to a folding sickle convenient for replacing a sickle head, which comprises the sickle head, a connecting column and a tubular grip, an adjusting groove is arranged at the top end of the connecting column, an adjusting block is rotatably connected to the inner side of the adjusting groove, the side surface of the adjusting block is elliptical, and the handle is arranged on the adjusting block. One end of the tool bit is fixedly connected with one end of the adjusting block, when the end, away from the tool bit, of the adjusting block rotates to the bottom end of the adjusting groove, the first wedge-shaped blocks can be pushed to move downwards and be separated from the second wedge-shaped blocks through the positioning rod, and the two sets of second wedge-shaped blocks can be pushed to move reversely through the elastic force of the small springs. Furthermore, the two groups of mounting pins are driven to move out of the mounting holes and retract into the connecting grooves, so that the fixed connection between the connecting column and the grip is automatically relieved, and the tool bit is conveniently and quickly replaced.

Description

Technical Field

[0001] This utility model relates to the field of sickles, and more specifically, to a folding sickle with a replaceable blade. Background Technology

[0002] The sickle is a farming tool used in rural areas for harvesting crops and cutting grass. It consists of a blade and a handle and is generally used for harvesting wheat, rice, etc. It is still widely used in rural areas. In traditional sickles, the blade and handle are fixed together. This design makes the sickle take up a lot of space when not in use. The blade is usually exposed when not in use, and because the blade is sharp, it can easily cause cuts or lacerations.

[0003] The inventor discovered that at least the following problems remain unsolved in the existing technology: the blade of the sickle becomes dull after prolonged use and needs to be sharpened, which renders the sickle unusable and affects work efficiency; while there are sickles on the market with replaceable blades, they are mainly fixed by multiple sets of bolts, requiring disassembly tools and are cumbersome to disassemble and install the blades; and while there are sickles on the market with foldable blades, there is no corresponding fixing mechanism after the blade is folded, and the blade can easily open while the sickle is being carried, still easily causing scratches or cuts.

[0004] To address the aforementioned issues, a folding sickle that facilitates blade replacement is proposed. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the problems existing in the prior art, this utility model provides a folding sickle that facilitates blade replacement, thereby solving the problems mentioned in the background art, such as the inconvenience of quickly assembling and disassembling the blade, and the ease with which the blade can be opened after folding.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: a folding sickle with an easily replaceable blade, comprising a blade, a connecting post, and a tubular handle. The top of the connecting post has an adjustment groove, and an adjustment block is rotatably connected to the inner side of the adjustment groove. The side of the adjustment block is elliptical. One end of the blade is fixedly connected to one end of the adjustment block. A fixing mechanism is used to fix the blade's position. The fixing mechanism includes a positioning rod and an adjusting sleeve. A sliding groove is provided at the upper end of the connecting post, and a slider is slidably connected inside the sliding groove. The positioning rod vertically penetrates the slider. The middle part is fixedly connected to the slider, and a large spring is provided on the bottom side of the slider. A first positioning groove is opened in the middle of the bottom end of the adjusting block; the disassembly and assembly mechanism is used for disassembling and assembling the blade and the handle. The disassembly and assembly mechanism includes a first wedge block and two sets of second wedge blocks. A connecting groove is opened on the bottom side of the slide. The bottom end of the positioning rod is fixedly connected to the middle of the upper surface of the first wedge block. An installation pin is horizontally fixedly installed on the side of the second wedge block away from the first wedge block. A small spring is provided on the side of the second wedge block away from the first wedge block. Installation holes are symmetrically opened on both sides of the top of the handle.

[0009] The present invention is further configured such that a second positioning groove is provided on the side of the bottom end of the adjusting block near the cutter head, the top end of the positioning rod is inserted into the first positioning groove and the second positioning groove, and the large spring is sleeved on the outside of the positioning rod.

[0010] The present invention is further configured such that the two ends of the slider located on the outside of the slide groove are respectively fixedly connected to the inner walls of the two sides of the adjusting sleeve, a first fixing hole is provided through the middle of the front side of the adjusting sleeve, and a second fixing hole is provided on the front side of the connecting column. The first fixing hole and the second fixing hole correspond to each other, and the connecting column and the adjusting sleeve are fixedly connected through the first fixing hole and the second fixing hole by a screw.

[0011] The present invention is further configured such that the bottom end of the connecting post is inserted into the top end of the handle, the mounting pin is placed at one end outside the connecting groove and inserted into the mounting hole, the first wedge block is placed in the middle of the inner side of the connecting groove, two sets of second wedge blocks are symmetrically arranged on both sides of the first wedge block, the first wedge block is movably connected to the two sets of second wedge blocks, and the dimensions of the first wedge block and the second wedge block are matched, the mounting pin is matched with the dimensions of the connecting groove and the mounting hole, and the mounting pins on both sides of the connecting post correspond to the mounting holes on both sides of the handle, and the small spring is sleeved on the outside of the mounting pin.

[0012] The present invention is further configured such that limiting grooves are horizontally opened on both sides of the inner wall at the top of the connecting groove, and a limiting block is fixedly installed at the top of the second wedge-shaped block, and the limiting block is slidably connected to the limiting groove.

[0013] The present invention is further configured such that a guide groove is provided on the inner wall of the bottom end of the adjusting groove near the blade head, the guide groove is matched with the size of the blade head, and an operating port is provided through the outer side of the blade head, the operating port being located in the middle of the blade head and away from the blade edge of the blade head.

[0014] The present invention is further configured such that a connecting rod is installed through the middle of the adjusting block, the connecting rod is rotatably connected to the inner walls on both sides of the adjusting groove through bearings, and the size of the adjusting block matches that of the adjusting groove.

[0015] (III) Beneficial Effects

[0016] Compared with the prior art, this utility model provides a folding sickle that facilitates blade replacement, and has the following beneficial effects: This utility model, through the rotatable connection between the adjusting block and the connecting column, can adjust the position of the blade. Through the elastic force of the large spring, the slider can push the top of the positioning rod into the first positioning groove and the second positioning groove respectively, which can fix the blade in the use and storage states. When the end of the adjusting block away from the blade rotates to the bottom of the adjusting groove, the positioning rod can push the first wedge block to move downward and separate from the second wedge block. Through the elastic force of the small spring, the two sets of second wedge blocks can be pushed to move in opposite directions, further driving the two sets of mounting pins to move out of the mounting holes and into the connecting groove, thereby automatically releasing the fixed connection between the connecting column and the handle, facilitating the quick replacement of the blade. Attached Figure Description

[0017] Figure 1 A schematic diagram of a folding sickle designed for easy blade replacement.

[0018] Figure 2 A schematic diagram of the disassembled structure of a folding sickle designed for easy blade replacement.

[0019] Figure 3 A schematic diagram of the blade structure of a folding sickle designed for easy blade replacement.

[0020] Figure 4 A diagram showing the blade of a folding sickle in normal use, designed for easy blade replacement.

[0021] Figure 5 A diagram illustrating the disassembly of the blade of a folding sickle to facilitate blade replacement.

[0022] In the diagram: 1. Cutting head; 11. Handle; 12. Connecting post; 13. Adjusting groove; 14. Adjusting block; 15. Connecting rod; 16. Guide groove; 17. Operating port; 2. Slide groove; 21. Sliding block; 22. Positioning rod; 23. Large spring; 24. First positioning groove; 25. Second positioning groove; 26. Adjusting sleeve; 27. First fixing hole; 28. Second fixing hole; 29. ​​Screw; 3. Connecting groove; 31. First wedge block; 32. Second wedge block; 33. Mounting pin; 34. Small spring; 35. Mounting hole; 36. Limiting block; 37. Limiting groove. Detailed Implementation

[0023] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0024] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0025] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0026] For examples, please refer to Figure 1 - Figure 5 A folding sickle with easy-to-change blade includes a blade head 1, a connecting post 12, and a tubular handle 11. The top of the connecting post 12 has an adjustment groove 13. An adjustment block 14 is rotatably connected to the inner side of the adjustment groove 13. The side of the adjustment block 14 is elliptical. One end of the blade head 1 is fixedly connected to one end of the adjustment block 14. A connecting rod 15 is installed through the middle of the adjustment block 14. The connecting rod 15 is rotatably connected to the inner walls on both sides of the adjustment groove 13 through bearings. The size of the adjustment block 14 matches the size of the adjustment groove 13. A guide groove 16 is provided on the inner wall of the bottom end of the adjustment groove 13 near the blade head 1. The guide groove 16 matches the size of the blade head 1. An operating port 17 is provided through the outer side of the blade head 1. The operating port 17 is located in the middle of the blade head 1 and away from the blade edge.

[0027] The adjusting block 14 is rotatably connected to the adjusting groove 13 at the top of the connecting column 12 via the connecting rod 15, which allows the cutting head 1 to be rotated to adjust its position. The operating port 17 in the middle of the cutting head 1 facilitates operation by the staff and avoids being cut by the blade during the rotation of the cutting head 1. The guide groove 16 at the bottom of the adjusting groove 13 can prevent interference with the connecting column 12 when bending the cutting head 1.

[0028] For details, please refer to Figure - Figure 5 The fixing mechanism is used to fix the position of the cutter head 1. The fixing mechanism includes a positioning rod 22 and an adjusting sleeve 26. The upper end of the connecting column 12 is provided with a sliding groove 2. The sliding slider 21 is slidably connected inside the sliding groove 2. The positioning rod 22 vertically passes through the middle of the sliding slider 21 and is fixedly connected to the sliding slider 21. A large spring 23 is provided on the bottom side of the sliding slider 21. The large spring 23 is sleeved on the outside of the positioning rod 22. The middle of the bottom end of the adjusting block 14 is provided with a first positioning groove 24. The bottom end of the adjusting block 14 near the cutter head 1 is provided with a second positioning groove 25. The top end of the positioning rod 22 is inserted into the first positioning groove 24 and the second positioning groove 25.

[0029] When the cutter head 1 is in normal use, the adjusting block 14 is in a horizontal state in the adjusting groove 13. At this time, the first positioning groove 24 at the bottom center of the adjusting block 14 is aligned with the top of the positioning rod 22. It is slidably connected to the slider 21 through the sliding groove 2. The elastic force of the large spring 23 on the bottom side of the slider 21 can push the top of the positioning rod 22 into the first positioning groove 24, which can position the cutter head 1 during use. When the cutter head 1 is bent and stored, the second positioning groove 25 on the bottom side of the adjusting block 14 is aligned with the top of the positioning rod 22. The elastic force of the large spring 23 can push the top of the positioning rod 22 into the second positioning groove 25, which can position the cutter head 1 during bending and storage.

[0030] Further, see Figure – Figure 5 The disassembly and assembly mechanism is used for disassembling and assembling the blade head 1 and the handle 11. The mechanism includes a first wedge block 31 and two sets of second wedge blocks 32. The bottom end of the connecting post 12 is inserted into the top end of the handle 11. A connecting groove 3 is provided on the bottom side of the sliding groove 2. The first wedge block 31 is placed in the middle of the inner side of the connecting groove 3, and the bottom end of the positioning rod 22 is fixedly connected to the middle of the upper surface of the first wedge block 31. The two sets of second wedge blocks 32 are symmetrically arranged on both sides of the first wedge block 31. The first wedge block 31 and the two sets of second wedge blocks 32 are movably connected, and the dimensions of the first wedge block 31 and the second wedge block 32 are matched. The side of the second wedge block 32 away from the first wedge block 31 is... A mounting pin 33 is fixedly installed on the flat side. A small spring 34 is provided on the side of the second wedge block 32 away from the first wedge block 31. The small spring 34 is sleeved on the outside of the mounting pin 33. Mounting holes 35 are symmetrically opened on both sides of the top of the handle 11. The end of the mounting pin 33 placed outside the connecting groove 3 is inserted into the mounting hole 35. The dimensions of the mounting pin 33, the connecting groove 3, and the mounting holes 35 are matched. The mounting pins 33 on both sides of the connecting post 12 correspond to the mounting holes 35 on both sides of the handle 11. Limiting grooves 37 are horizontally opened on both sides of the inner wall of the top of the connecting groove 3. A limiting block 36 is fixedly installed on the top of the second wedge block 32. The limiting block 36 is slidably connected to the limiting groove 37.

[0031] When the cutter head 1 needs to be replaced, rotate the cutter head 1 so that the end of the adjusting block 14 away from the cutter head 1 rotates to the bottom of the adjusting groove 13. At this time, the adjusting block 14 can push the top of the positioning rod 22 to move downward and into the sliding groove 2. At the same time, the positioning rod 22 can push the first wedge block 31 to move downward in the connecting groove 3 and separate from the second wedge block 32. A small spring 34 is provided on the side of the second wedge block 32 away from the first wedge block 31. The elastic force of the small spring 34 can push the two sets of second wedge blocks 32 to move relative to each other, further pulling the two sets of mounting pins 33 out of the mounting hole 35 and into the connecting groove 3, thereby automatically releasing the fixed connection between the connecting post 12 and the handle 11, which facilitates the quick replacement of the cutter head 1.

[0032] It is worth noting that, see Figure - Figure 5 The slider 21 is located at both ends outside the slide groove 2 and is fixedly connected to the inner walls of both sides of the adjusting sleeve 26. The middle of the front side of the adjusting sleeve 26 is provided with a first fixing hole 27 and the front side of the connecting post 12 is provided with a second fixing hole 28. The first fixing hole 27 and the second fixing hole 28 correspond to each other, and the connecting post 12 and the adjusting sleeve 26 are fixedly connected by a screw 29 passing through the first fixing hole 27 and the second fixing hole 28.

[0033] During the use and bending storage of the cutter head 1, the screw 29 passes through the first fixing hole 27 and the second fixing hole 28 on the outside of the adjusting sleeve 26 and the connecting post 12, so that the adjusting sleeve 26 is fixedly connected to the connecting post 12, and the slider 21 is further fixed, thereby improving the fixing effect of the positioning rod 22 on the adjusting block 14 and preventing the cutter head 1 from loosening during use. It should be noted that when adjusting the use state of the cutter head 1, the top of the positioning rod 22 needs to be moved out of the first positioning groove 24 and the second positioning groove 24 by the adjusting sleeve 26.

[0034] Of all the solutions mentioned above, those involving the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

Claims

1. A folding sickle with easily replaceable blades, characterized in that: It includes a blade (1), a connecting post (12) and a tubular handle (11). The top of the connecting post (12) is provided with an adjustment groove (13). An adjustment block (14) is rotatably connected to the inner side of the adjustment groove (13). The side of the adjustment block (14) is elliptical. One end of the blade (1) is fixedly connected to one end of the adjustment block (14). Fixing mechanism: used to fix the position of the cutter head (1). The fixing mechanism includes a positioning rod (22) and an adjusting sleeve (26). The upper end of the connecting column (12) is provided with a sliding groove (2). The sliding groove (2) is slidably connected to a slider (21). The positioning rod (22) vertically passes through the middle of the slider (21) and is fixedly connected to the slider (21). A large spring (23) is provided on the bottom side of the slider (21). The middle of the bottom end of the adjusting block (14) is provided with a first positioning groove (24). Disassembly and assembly mechanism: used for disassembling and assembling the blade (1) and the handle (11). The disassembly and assembly mechanism includes a first wedge block (31) and two sets of second wedge blocks (32). A connecting groove (3) is provided on the bottom side of the slide groove (2). The bottom end of the positioning rod (22) is fixedly connected to the middle of the upper surface of the first wedge block (31). A mounting pin (33) is horizontally fixedly installed on the side of the second wedge block (32) away from the first wedge block (31). A small spring (34) is provided on the side of the second wedge block (32) away from the first wedge block (31). Mounting holes (35) are symmetrically provided on both sides of the top of the handle (11).

2. A folding sickle with easily replaceable blade as described in claim 1, characterized in that: The bottom end of the adjusting block (14) is provided with a second positioning groove (25) near the cutter head (1). The top end of the positioning rod (22) is inserted into the first positioning groove (24) and the second positioning groove (25). The large spring (23) is sleeved on the outside of the positioning rod (22).

3. A folding sickle with an easily replaceable blade as described in claim 1, characterized in that: The slider (21) is located on the outside of the slide groove (2) and its two ends are fixedly connected to the inner walls of the two sides of the adjusting sleeve (26). The adjusting sleeve (26) has a first fixing hole (27) through the middle of its front side and a second fixing hole (28) through the front side of the connecting column (12). The first fixing hole (27) and the second fixing hole (28) correspond to each other, and the connecting column (12) and the adjusting sleeve (26) are fixedly connected by a screw (29) through the first fixing hole (27) and the second fixing hole (28).

4. A folding sickle with easily replaceable blades according to claim 1, characterized in that: The bottom end of the connecting post (12) is inserted into the top end of the handle (11). The mounting pin (33) is placed on the outside of the connecting groove (3) and inserted into the mounting hole (35). The first wedge block (31) is placed in the middle of the inner side of the connecting groove (3). Two sets of second wedge blocks (32) are symmetrically arranged on both sides of the first wedge block (31). The first wedge block (31) and the two sets of second wedge blocks (32) are movably connected. The dimensions of the first wedge block (31) and the second wedge block (32) are matched. The dimensions of the mounting pin (33) are matched with the dimensions of the connecting groove (3) and the mounting hole (35). The mounting pins (33) on both sides of the connecting post (12) correspond to the mounting holes (35) on both sides of the handle (11). The small spring (34) is sleeved on the outside of the mounting pin (33).

5. A folding sickle with an easily replaceable blade according to claim 1, characterized in that: Limiting grooves (37) are horizontally opened on both sides of the inner wall of the top of the connecting groove (3), and a limiting block (36) is fixedly installed on the top of the second wedge block (32). The limiting block (36) is slidably connected to the limiting groove (37).

6. A folding sickle with easily replaceable blades according to claim 1, characterized in that: The inner wall of the bottom end of the adjustment groove (13) is provided with a guide groove (16) on the side near the cutter head (1). The guide groove (16) is matched with the size of the cutter head (1). An operation port (17) is provided through the outer side of the cutter head (1). The operation port (17) is located in the middle of the cutter head (1) and away from the cutting edge of the cutter head (1).

7. A folding sickle with easily replaceable blades according to claim 1, characterized in that: A connecting rod (15) is installed through the middle of the adjusting block (14). The connecting rod (15) is rotatably connected to the inner walls on both sides of the adjusting groove (13) through bearings. The size of the adjusting block (14) matches that of the adjusting groove (13).

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