Portable wheat straw cutter

Abstract

This invention discloses a portable wheat straw cutter, comprising a back plate, a support plate horizontally fixed to the bottom rear side of the back plate, a lifting assembly vertically fixed to the rear side of the support plate, a rod on one side of the back plate, a cutting assembly fixedly connected to one end of the rod, and a connecting seat rotatably connected to the other end of the rod. A universal connecting assembly is provided between the connecting seat and the lifting assembly. By setting the screw, internal threaded tube, and adjusting wheel in the lifting assembly, the extension height of the internal threaded tube can be adjusted, thereby changing the working height of the cutting assembly to accommodate operators of different heights and straw of different heights, avoiding bending over and reducing labor intensity. The universal connecting assembly includes an L-shaped connecting rod, a second connecting block, a rotating shaft, and a third connecting block, enabling the rod to rotate at multiple angles in the horizontal and vertical directions, allowing the cutting assembly to flexibly adjust the cutting angle to adapt to straw with different growth directions, improving cutting efficiency and safety.

Description

Technical Field

[0001] This invention relates to the field of agricultural machinery technology, and in particular to a portable wheat straw cutter. Background Technology

[0002] After wheat harvest, straw processing is a crucial part of agricultural production. Chopped straw can be used for returning to the field, feed processing, or biomass energy utilization.

[0003] Currently, there are two main methods for cutting straw: using large, stationary straw crushers, suitable for centralized processing, but the equipment is bulky, energy-intensive, and inconvenient to move in the field; and manual cutting using handheld scissors or chaff cutters, which is labor-intensive, inefficient, and results in uneven cut lengths. Existing portable electric cutting tools mostly use straight-handle structures, requiring bending or squatting during operation, which can easily lead to fatigue during prolonged work. Furthermore, different users have different heights, and straw heights vary, making existing tools unable to flexibly adjust the cutting height and angle, resulting in poor adaptability.

[0004] Therefore, existing wheat straw cutting tools still need improvement in terms of portability, height adjustment, and operating comfort. There is an urgent need for a portable cutter that can be carried on the back, has adjustable height, and flexible cutting angle. Summary of the Invention

[0005] The purpose of this invention is to provide a portable wheat straw cutter to solve the problems of existing cutting tools being inconvenient to carry, having no height adjustment, and being laborious to operate.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a portable wheat straw cutter, comprising a back plate, a support plate horizontally fixedly connected to the bottom rear side of the back plate, a lifting assembly vertically fixedly connected to the rear side of the support plate, a rod provided on one side of the back plate, a cutting assembly fixedly connected to one end of the rod, and a connecting seat rotatably connected to the other end of the rod. A universal connecting assembly is provided between the connecting seat and the lifting assembly. This solution designs the entire device as a carryable structure. The back plate supports the various components and is fixed to the operator's back with a shoulder strap. The support plate extends from the rear of the back plate to provide a stable base for the lifting assembly. The lifting assembly can adjust the working height of the cutting assembly. The rod, as an operating handle, can be adjusted at multiple angles through the universal connecting assembly, thereby enabling the cutting assembly to flexibly adapt to wheat straw of different heights and orientations. The operator can complete the cutting without bending over or frequently moving their body.

[0007] Preferably, a protective pad is fixedly connected to the front side of the back panel, and carrying straps are fixedly connected between the upper and lower ends of both sides of the back panel. The protective pad is made of soft material to increase carrying comfort and prevent the back panel from directly pressing on the back; the carrying straps are adjustable in length, which can securely bind the device to the operator, prevent shaking during operation, and free the hands, making it convenient to walk and operate in the field.

[0008] Preferably, a storage battery is fixedly connected to the rear side of the back plate. The storage battery provides power to the servo motor in the cutting assembly, eliminating the need for an external power cord and making it suitable for field environments without power outlets. The storage battery can be rechargeable, allowing for several hours of continuous operation on a single charge, thus improving portability and battery life.

[0009] Preferably, the lifting assembly includes a support tube vertically fixedly connected to the support plate, and a screw is vertically rotatably connected inside the support tube. The support tube acts as an outer sleeve, and the rotation of the internal screw drives the mating internal threaded tube to rise and fall. A bearing or smooth contact surface is provided between the screw and the support tube to ensure flexible rotation, thereby enabling continuous adjustment of the cutting assembly height.

[0010] Preferably, limit strips are vertically fixed to both sides inside the support tube, and an adjusting wheel is fixedly connected to the bottom end of the screw. The limit strips restrict the rotational freedom of the internally threaded tube, allowing it to move only axially; the adjusting wheel allows the operator to manually rotate the screw, quickly adjusting the height without tools, making it easy to operate even in the field.

[0011] Preferably, an internally threaded tube is inserted and connected inside the support tube. The internally threaded tube is threadedly connected to the screw. Vertical grooves are formed on both sides of the external surface of the internally threaded tube, and these grooves are slidably connected to corresponding limiting strips. Driven by the screw, the internally threaded tube smoothly rises and falls along the limiting strips. The cooperation between the grooves and the limiting strips ensures the straightness and stability of the rising and falling process, preventing shaking or jamming, and making height adjustment more precise and reliable.

[0012] Preferably, the cutting assembly includes a protective cover inclinedly connected to the rod body. A servo motor is fixedly connected to the upper surface of the protective cover, and a circular saw is fixedly connected to the output end of the servo motor through the protective cover. The protective cover is inclined at a certain angle to the rod body, which facilitates the operator to apply force naturally while standing. The servo motor has a high and controllable rotation speed, driving the circular saw to rotate at high speed, quickly cutting the straw with a clean cut, and the efficiency is much higher than that of manual tools.

[0013] Preferably, a handle is fixedly connected to one side of the rod, and several protective teeth are fixedly attached to the circumference of one side of the protective cover. A push plate is vertically fixedly connected to the upper surface of the protective cover. The handle facilitates the operator's grip and control of the rod's direction; the protective teeth contact the straw before cutting, pressing it down to prevent slippage, and the circular saw cuts through the teeth, ensuring stable cutting; the push plate provides the operator with a point of downward force application, making the cutting action more effortless and safer.

[0014] Preferably, the universal joint assembly includes a first connecting block fixedly connected to the top end of the internally threaded pipe, an L-shaped connecting rod fixedly connected to the side of the first connecting block, a second connecting block rotatably connected to the bottom end of the L-shaped connecting rod, and a rotating shaft horizontally rotatably connected to the side of the second connecting block. The L-shaped connecting rod can swing vertically about its connection point with the second connecting block, and the rotating shaft can rotate horizontally. The combination of the two provides two orthogonal rotational degrees of freedom, allowing the rod to flexibly adjust its spatial posture within a certain range.

[0015] Preferably, a third connecting block is fixedly connected to one end of the rotating shaft, and the third connecting block is hinged to the connecting seat. The hinged connection between the third connecting block and the connecting seat adds a third degree of rotational freedom, allowing the rod to pitch and swing along its own axis. The coordination of these three degrees of freedom enables the cutting assembly to achieve omnidirectional adjustment, allowing the operator to easily align the circular saw with the cutting position regardless of the direction in which the straw is bent.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. By setting up a back panel and carrying straps, the entire device can be carried on the operator's back, powered by a battery, freeing up the hands and facilitating movement in the field, thus enabling portable operation.

[0017] 2. By setting the screw, internal threaded tube and adjusting wheel in the lifting assembly, the extension height of the internal threaded tube can be adjusted, thereby changing the working height of the cutting assembly to adapt to operators of different heights and straw of different heights, avoiding bending over and reducing labor intensity.

[0018] 3. By setting up the L-shaped connecting rod, the second connecting block, the rotating shaft and the third connecting block in the universal connection assembly, the rod body can rotate at multiple angles in the horizontal and vertical directions, so that the cutting assembly can flexibly adjust the cutting angle to adapt to straw with different growth directions, thereby improving cutting efficiency and safety.

[0019] 4. By setting up a protective cover, protective teeth and push plate in the cutting assembly, the protective teeth can press down on the straw to prevent slippage when the circular saw is cutting, the push plate makes it easier for the operator to apply force, and the protective cover effectively blocks flying debris, thus improving the safety of use. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a rear view of the present invention; Figure 3 This is a schematic diagram of the lifting component structure of the present invention; Figure 4 This is a schematic diagram of the universal connection component structure of the present invention; Figure 5 This is a schematic diagram of the cutting component structure of the present invention; Figure 6 This is a schematic diagram of the servo motor mounting structure of the present invention.

[0021] In the diagram: 1. Backplate; 2. Protective pad; 3. Shoulder strap; 4. Battery; 5. Support plate; 6. Lifting assembly; 7. Rod; 8. Cutting assembly; 9. Universal connector assembly; 10. Support tube; 11. Screw; 12. Adjusting wheel; 13. Internal threaded tube; 14. First connecting block; 15. L-shaped connecting rod; 16. Second connecting block; 17. Rotating shaft; 18. Third connecting block; 19. Connecting seat; 20. Handle; 21. Protective cover; 22. Protective teeth; 23. Push plate; 24. Circular saw; 25. Servo motor. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Please see Figure 1-6 This invention provides a technical solution: A portable wheat straw cutter, comprising a back plate 1, a protective pad 2 fixedly connected to the front side of the back plate 1, shoulder straps 3 fixedly connected between the upper and lower ends of both sides of the back plate 1, and a battery 4 fixedly connected to the rear side of the back plate 1. A support plate 5 is horizontally fixedly connected to the bottom rear side of the back plate 1, and a lifting assembly 6 is vertically fixedly connected to the rear side of the support plate 5. A rod 7 is provided on one side of the back plate 1, a cutting assembly 8 is fixedly connected to one end of the rod 7, and a connecting seat 19 is rotatably connected to the other end of the rod 7. A universal connecting assembly 9 is provided between the connecting seat 19 and the lifting assembly 6.

[0024] In this embodiment, the backplate 1 is worn on the operator's back, the protective pad 2 increases comfort, the shoulder strap 3 is used for fixation, and the battery 4 provides power to the cutting assembly 8. The support plate 5 supports the lifting assembly 6, and the overall height of the lifting assembly 6 is adjustable. The rod 7 serves as the operating handle, with the cutting assembly 8 mounted on one end and the other end connected to the lifting assembly 6 via a universal joint assembly 9, enabling flexible adjustment at multiple angles.

[0025] To achieve overall carrying capacity and height adjustment, this device employs the following technical solution: The lifting assembly 6 includes a support tube 10 vertically fixedly connected to the support plate 5, with a screw 11 vertically rotatably connected inside the support tube 10. Limiting strips are vertically fixedly connected to both sides inside the support tube 10, and an adjusting wheel 12 is fixedly connected to the bottom end of the screw 11. An internally threaded tube 13 is inserted and connected inside the support tube 10, threadedly connected to the screw 11. Vertically grooved slots are formed on both sides of the external surface of the internally threaded tube 13, and these slots are slidably connected to the corresponding limiting strips. Rotating the adjusting wheel 12 causes the screw 11 to rotate, driving the internally threaded tube 13 to vertically rise and fall along the limiting strips, thereby changing the height of the universal connection assembly 9 and the cutting assembly 8 to accommodate different operator heights or straw heights.

[0026] The protective pad 2 increases carrying comfort, and the length of the shoulder strap 3 is adjustable; the battery 4 provides power to the servo motor 25, eliminating the need for an external power source.

[0027] To achieve flexible multi-angle adjustment of the cutting assembly, the device employs the following technical solution: The universal connecting assembly 9 includes a first connecting block 14 fixedly connected to the top of the internally threaded tube 13. An L-shaped connecting rod 15 is fixedly connected to the side of the first connecting block 14. A second connecting block 16 is rotatably connected to the bottom of the L-shaped connecting rod 15. A rotating shaft 17 is horizontally rotatably connected to the side of the second connecting block 16. A third connecting block 18 is fixedly connected to one end of the rotating shaft 17, and the third connecting block 18 is hinged to the connecting seat 19. The L-shaped connecting rod 15 can rotate vertically around its connection point with the second connecting block 16, the rotating shaft 17 can rotate horizontally, and the hinged connection between the connecting seat 19 and the third connecting block 18 allows for the pitching and swinging of the rod 7. These three degrees of rotational freedom enable the rod 7 and the cutting assembly 8 to flexibly adjust the cutting angle and direction.

[0028] The universal connector 9 allows the operator to cover a certain cutting area without moving their body, improving operational flexibility and efficiency.

[0029] To achieve rapid straw cutting and safety protection, this device employs the following technical solution: The cutting assembly 8 includes a protective cover 21 inclinedly connected to the rod 7. A servo motor 25 is fixedly connected to the upper surface of the protective cover 21, and a circular saw 24 is fixedly connected to the output end of the servo motor 25 through the protective cover 21. A handle 20 is fixedly connected to one side of the rod 7, and several protective teeth 22 are fixedly attached to the circumference of one side of the protective cover 21. A push plate 23 is vertically fixedly connected to the upper surface of the protective cover 21. During operation, the handle 20 is held, and the push plate 23 is used to apply downward force. The protective teeth 22 first contact the straw and press it down to prevent slippage. The circular saw 24 rotates at high speed under the drive of the servo motor 25, cutting the straw. The protective cover 21 prevents sawdust from flying.

[0030] The gaps in the protective teeth 22 allow for the containment of straw, ensuring that the straw does not deviate during cutting; the push plate 23 provides a point of force application, making operation easier; the circular saw 24 cuts quickly and produces clean cuts.

[0031] The working principle and usage process of this invention: The operator carries the back plate 1 on their back via the shoulder strap 3, with the protective pad 2 conforming to the back for increased comfort. Adjusting the rotating wheel 12 according to the operator's height and the height of the straw in the field, the internal threaded tube 13 is raised or lowered, adjusting the cutting component 8 to a suitable height. Holding the handle 20, the angle of the rod 7 is adjusted via the universal joint component 9, aligning the circular saw 24 with the straw to be cut. The servo motor 25 is started, and the circular saw 24 rotates at high speed. The push plate 23 is pressed down, the protective teeth 22 first hold the straw in place, and then the circular saw 24 cuts in, instantly severing the straw. After cutting, the rod 7 is lifted, and the operator moves to the next straw, repeating the operation. The battery 4 powers the servo motor 25, allowing for continuous operation for several hours. After use, the servo motor 25 is turned off, and the circular saw 24 and protective cover 21 are cleaned. This cutter is suitable for field cutting of straw such as wheat and rice, is portable and efficient, and requires little effort to operate.

[0032] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A portable wheat straw cutter, comprising a back plate (1), characterized in that: A support plate (5) is horizontally fixed to the bottom rear side of the back plate (1), and a lifting assembly (6) is vertically fixed to the rear side of the support plate (5). A rod (7) is provided on one side of the back plate (1), and a cutting assembly (8) is fixedly connected to one end of the rod (7). A connecting seat (19) is rotatably connected to the other end of the rod (7). A universal connecting assembly (9) is provided between the connecting seat (19) and the lifting assembly (6).

2. The portable wheat straw cutter according to claim 1, characterized in that: A protective pad (2) is fixedly connected to the front side of the back panel (1), and a shoulder strap (3) is fixedly connected between the upper and lower ends of both sides of the back panel (1).

3. A portable wheat straw cutter according to claim 1, characterized in that: A battery (4) is fixedly connected to the rear side of the back plate (1).

4. A portable wheat straw cutter according to claim 1, characterized in that: The lifting assembly (6) includes a support tube (10) that is vertically fixedly connected to the support plate (5), and a screw (11) is vertically rotatably connected inside the support tube (10).

5. A portable wheat straw cutter according to claim 4, characterized in that: The support tube (10) has vertically fixed limit strips on both sides inside, and the bottom end of the screw (11) is fixedly connected to an adjusting wheel (12).

6. A portable wheat straw cutter according to claim 5, characterized in that: The support tube (10) is internally connected to a threaded tube (13), which is threaded to the screw (11). The threaded tube (13) is vertically opened on both sides of the outside of the threaded tube (13), and the threaded tube is slidably connected to the corresponding limit strip.

7. A portable wheat straw cutter according to claim 6, characterized in that: The cutting assembly (8) includes a protective cover (21) that is inclinedly connected to the rod (7). A servo motor (25) is fixedly connected to the upper surface of the protective cover (21). A circular saw (24) is fixedly connected to the output end of the servo motor (25) through the protective cover (21).

8. A portable wheat straw cutter according to claim 7, characterized in that: A handle (20) is fixedly connected to one side of the rod (7), a number of protective teeth (22) are fixedly fixed to one side of the protective cover (21), and a push plate (23) is fixedly connected to the upper surface vertically.

9. A portable wheat straw cutter according to claim 8, characterized in that: The universal connector assembly (9) includes a first connecting block (14) fixedly connected to the top of the internal threaded tube (13), an L-shaped connecting rod (15) fixedly connected to the side of the first connecting block (14), a second connecting block (16) rotatably connected to the bottom of the L-shaped connecting rod (15), and a rotating shaft (17) rotatably connected to the side of the second connecting block (16).

10. A portable wheat straw cutter according to claim 9, characterized in that: One end of the rotating shaft (17) is fixedly connected to a third connecting block (18), and the third connecting block (18) is hinged to the connecting seat (19).

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