Handheld camellia oil vibration harvesting device

Abstract

The application relates to the technical field of agricultural harvesting machinery, in particular to a handheld camellia oleifera vibration excitation harvesting device which comprises a main box, an operating rod, a length adjusting assembly, a vibration excitation assembly and a linkage enhancement assembly, the vibration excitation assembly is arranged in the main box, a driving mechanism drives an executing mechanism to make the tail end head generate vibration excitation force, the linkage enhancement assembly comprises a linkage mechanism, a mechanical energy conversion mechanism and a self-adaptive clamping mechanism; the linkage mechanism forms a floating gap between the main box and the operating rod, absorbs and buffers vibration impact; the mechanical energy conversion mechanism converts the absorbed vibration energy into air pressure power for driving the self-adaptive clamping mechanism; the self-adaptive clamping mechanism is arranged in the tail end head and automatically adjusts the clamping force according to the vibration intensity. The application correlates vibration isolation and energy recovery, makes the clamping force adaptively change according to the vibration excitation working condition, reduces the vibration burden of the operator's arm, and improves the clamping adaptability and vibration transmission efficiency for different thick and thin branches.

Description

Technical Field

[0001] This invention relates to the field of agricultural harvesting machinery technology, specifically a handheld vibratory harvesting device for camellia oleifera. Background Technology

[0002] Camellia oleifera is an important woody oilseed tree species in my country, and its fruit harvesting is a crucial step in the production process. Traditional manual picking methods are labor-intensive and inefficient, and since Camellia oleifera trees mostly grow in hilly and mountainous areas with complex terrain, large-scale combined harvesting machinery is difficult to employ. In recent years, handheld vibratory harvesting devices have gradually become the mainstream research direction for mechanized Camellia oleifera harvesting due to their advantages such as portability, flexibility, and adaptability. Existing handheld vibratory harvesting devices typically consist of an operating lever, a vibration source, and a clamping end head. High-frequency vibration causes resonance in the Camellia oleifera fruit branches, thereby achieving fruit detachment and separation.

[0003] Existing handheld vibratory harvesting devices for camellia oleifera exhibit significant drawbacks during use. First, the high-frequency vibrations generated by the vibrating components are directly transmitted to the operator's arm along the rigidly connected operating rod, easily leading to hand fatigue during prolonged operation and severely impacting operational comfort and safety. Second, the clamping mechanisms of existing devices are mostly fixed or manually adjustable. Given the varying thickness and irregular shape of camellia oleifera branches, the clamping force is difficult to adjust adaptively; too tight a clamp damages the bark, while too loose a clamp results in inefficient vibration transmission and poor harvesting outcomes. Summary of the Invention

[0004] The purpose of this invention is to provide a handheld vibratory harvesting device for camellia oleifera to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A handheld vibratory harvesting device for camellia oleifera includes: A main unit box, with an operating lever connected to one side of the main unit box; A length adjustment component, wherein the length adjustment component is used to adjust the length of the operating lever; A vibration assembly is disposed in the main unit box. The vibration assembly includes an end head, a drive mechanism, and an actuator. The end head is used to clamp the branches of the camellia tree. The drive mechanism is used to drive the vibration force generated by the actuator. The actuator is connected to the end head. The linkage enhancement component includes a linkage mechanism, a mechanical energy conversion mechanism, and an adaptive clamping mechanism. The linkage mechanism is disposed between the main unit and the operating lever. The linkage mechanism is used to absorb and buffer the vibration impact transmitted from the excitation component to the operating lever along the excitation direction. The mechanical energy conversion mechanism is used to convert the absorbed energy into a driving force to drive the adaptive clamping mechanism. The adaptive clamping mechanism is disposed inside the end head and is used to clamp the branches of the camellia fruit.

[0006] Preferably, the length adjustment assembly includes a telescopic tube, a locking sleeve, and a manual knob. The telescopic tube is sleeved inside or outside the operating rod, and a sliding fit is formed between the telescopic tube and the operating rod, allowing the telescopic tube to slide relative to the operating rod along its axial direction. The locking sleeve is located at the connection between the operating rod and the telescopic tube, and the locking sleeve is equipped with a manual knob for allowing the telescopic tube to slide relative to the operating rod in the loose state and fixing the total length of the operating rod in the locked state.

[0007] Preferably, the drive mechanism includes a drive motor, which is disposed on one side of the main unit box, and the drive motor is used to drive the excitation force generated by the actuator.

[0008] Preferably, the main unit box has a guide groove. The actuator includes a base, an output wheel, a crank, a connecting rod, a transmission sleeve, a limiting block, and an impact rod. The base is disposed inside the main unit box. The output wheel is connected to the output end of the drive motor. The crank is rotatably connected to the base. One side of the crank is connected to the output wheel. When the drive motor drives the output wheel to rotate, it will drive the crank to rotate. The crank is connected to the connecting rod. The connecting rod is connected to the transmission sleeve. The transmission sleeve is movably connected to the guide groove. When the crank drives the connecting rod to move, the transmission sleeve will reciprocate along the guide groove to generate excitation force. The transmission sleeve has a limiting groove. The limiting block is movably connected to the limiting groove. The limiting block is connected to the impact rod. The impact rod is connected to the end head.

[0009] Preferably, the end cap has a C-shaped structure.

[0010] Preferably, the linkage mechanism includes a floating connecting seat, a telescopic guide post, and a vibration isolation spring. The floating connecting seat is fixedly disposed on the side of the main unit box near the operating rod. One end of the telescopic guide post is fixedly connected to the end of the operating rod, and the other end of the telescopic guide post is connected to the floating connecting seat. The vibration isolation spring is sleeved on the outside of the telescopic guide post. The vibration isolation spring is used to form a floating gap between the operating rod and the main unit box that allows relative reciprocating motion.

[0011] Preferably, the retractable guide column includes a fixed part and a sleeve part. The fixed part is fixedly connected to the end of the operating rod, and the sleeve part is connected to the main unit box. The sleeve part is sleeved on the outside of the fixed part. The mechanical energy conversion mechanism includes a connecting rod, a bidirectional rack, a transmission gear, a transmission rack, a piston rod one, a piston rod two, and a multi-cylinder piston cylinder. The connecting rod is connected to the fixed part and is connected to the bidirectional rack. The end of the bidirectional rack away from the connecting rod is connected to the piston rod one. The transmission gears are symmetrically arranged on both sides of the bidirectional rack. The transmission gears are rotatably connected to the main unit box. Each transmission gear meshes with the bidirectional rack. The transmission gears are connected to the transmission rack and are used to drive the transmission rack and the bidirectional rack to move in opposite directions. The transmission rack is connected to the piston rod two. Both piston rod one and piston rod two are connected to the multi-cylinder piston cylinder.

[0012] Preferably, the adaptive clamping mechanism includes a hydraulic cylinder, an adjusting piston, a clamping cylinder, and clamping blocks. The hydraulic cylinder is disposed on the main unit box. The exhaust end of the multi-cylinder piston cylinder is connected to the air chamber of the hydraulic cylinder through a pipe. The adjusting piston is movably connected to the air chamber. The air chamber is provided with a pressure relief valve. When the multi-cylinder piston cylinder inputs air into the air chamber, it pushes the adjusting piston to move along the air chamber, thereby inputting hydraulic oil into the clamping cylinder. The clamping cylinder is disposed on the end head, and the clamping cylinder is connected to several clamping blocks.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: By setting up a linkage mechanism, the present application utilizes a telescopic guide column and vibration isolation spring to form a floating gap between the main unit box and the operating rod, effectively absorbing and buffering the vibration impact transmitted from the excitation component to the operating rod, significantly reducing the vibration load on the operator's arm, and improving work comfort and safety; and by using a mechanical energy conversion mechanism to convert the vibration energy absorbed by the linkage mechanism into the power to drive the adaptive clamping mechanism, the vibration energy is recovered and reused, avoiding energy waste, while the clamping force is automatically adjusted according to the change of vibration intensity, ensuring that the branches will not loosen under strong vibration, and at the same time, it has both energy-saving and protective effects. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention. Figure 1 ; Figure 2 This is a three-dimensional structural diagram of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the cross-sectional structure of the main unit box of the present invention. Figure 1 ; Figure 4 This is a schematic diagram of the cross-sectional structure of the main unit box of the present invention. Figure 2 ; Figure 5 This is a schematic diagram showing the positions and structures of the base, transmission sleeve, impact rod, and hydraulic cylinder of the present invention. Figure 6 This is a schematic diagram showing the position and structure of the base and multi-cylinder piston cylinder of the present invention; Figure 7 This is a schematic diagram showing the connection of the output wheel, crank, connecting rod, and transmission sleeve of the present invention. Figure 8 This is a schematic diagram of the cross-sectional structure of the transmission sleeve of the present invention; Figure 9 This is a schematic diagram showing the connection between the hydraulic cylinder, hydraulic oil pipe, and clamping cylinder of the present invention; Figure 10 This is a schematic diagram showing the connections of the various components of the mechanical energy conversion mechanism of the present invention; Figure 11 This is a schematic diagram showing the positions of the bidirectional rack, transmission gear, transmission rack, piston rod one, and piston rod two of the present invention; Figure 12 This is a schematic diagram of the internal structure of the hydraulic cylinder of the present invention (the hydraulic cylinder is shown in cross-section).

[0015] In the diagram: 1. Main unit box; 2. Operating lever; 3. Telescopic tube; 4. Locking sleeve; 5. Manual knob; 6. End head; 7. Drive motor; 8. Guide groove; 9. Base; 10. Output wheel; 11. Crank; 12. Connecting rod; 13. Transmission sleeve; 14. Limiting block; 15. Impact rod; 16. Limiting groove; 17. Floating connecting seat; 19. Vibration isolation spring; 20. Fixing part; 21. Sleeve part; 22. Connecting rod; 23. Bidirectional rack; 24. Transmission gear; 25. Transmission rack; 26. Piston rod one; 27. Piston rod two; 28. Multi-cylinder piston cylinder; 29. ​​Hydraulic cylinder; 30. Adjusting piston; 31. Clamping cylinder; 32. Clamping block; 33. Pipe; 34. Air chamber; 35. Hydraulic chamber; 36. Hydraulic oil pipe; 101. Slide groove; 3401. Pressure relief valve. Detailed Implementation

[0016] 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.

[0017] Please see Figures 1-12 The present invention provides a technical solution: A handheld vibratory harvesting device for camellia oleifera, as shown in the instruction manual. Figure 1 As shown, it includes: The device comprises a main unit box 1, a length adjustment assembly, a vibration assembly, and a linkage enhancement assembly. The main unit box 1 serves as the mounting base and main support for the entire device, and its interior contains a cavity for housing and mounting the various functional components. An operating lever 2 is connected to one side of the main unit box 1. The operating lever 2 is used by the operator to grip and move the device to the target camellia tree branches for harvesting. A non-slip handle (not shown in the figure) can be provided at the distal end of the operating lever 2 (the end furthest from the main unit box 1) to enhance the operator's grip comfort and stability.

[0018] The length adjustment component is used to adjust the length of the operating lever 2, allowing the operator to adjust the lever 2 to a suitable length according to the actual working height and operating posture, thereby improving the applicability and ease of operation of the device. In this embodiment, the length adjustment component includes a telescopic tube 3, a locking sleeve 4, and a manual knob 5. The telescopic tube 3 is sleeved inside or outside the operating lever 2, and a sliding fit is formed between the telescopic tube 3 and the operating lever 2, allowing the telescopic tube 3 to slide relative to the operating lever 2 along its axial direction. The locking sleeve 4 is located at the connection between the operating lever 2 and the telescopic tube 3, and the manual knob 5 is provided on the locking sleeve 4. The manual knob 5 is installed on the locking sleeve 4 by a threaded connection or an eccentric clamping method. When the operator loosens the manual knob 5, the locking sleeve 4 is in the loose state, allowing the telescopic tube 3 to slide freely relative to the operating rod 2, thereby adjusting the total length of the operating rod 2. When the operator adjusts the operating rod 2 to the required length, the manual knob 5 is tightened, the locking sleeve 4 retracts and grips the telescopic tube 3, and the locking sleeve 4 is in the locked state, thus fixing the total length of the operating rod 2 at the current adjustment position, ensuring that the length of the operating rod 2 remains stable during operation.

[0019] The vibration assembly is located in the main unit box 1. The vibration assembly includes an end head 6, a drive mechanism, and an actuator. The end head 6 is used to clamp the branches of the camellia tree. The end head 6 is located on the outer side of the main unit box 1, away from the operating lever 2. The end head 6 and the main unit box 1 are connected by a guide structure or connecting component to achieve reciprocating motion. The drive mechanism drives the actuator to generate vibration force, and the actuator is connected to the end head 6. The drive mechanism provides the power source for the entire vibration assembly. The rotational motion generated by the drive mechanism is converted into high-frequency reciprocating linear motion by the actuator, thereby forming a periodic vibration force and transmitting it to the end head 6. The end head 6 then transmits the vibration force to the clamped camellia tree branches, causing the camellia fruit to separate from the branches due to inertial force under the vibration.

[0020] In this embodiment, the drive mechanism includes a drive motor 7, which is disposed on one side of the main unit box 1. The drive motor 7 can be a brushless DC motor or a brushed DC motor, with a high-torque brushless DC motor being preferred to ensure sufficient excitation force output even under high load conditions. The housing of the drive motor 7 is fixedly mounted to the outer wall of the main unit box 1 by bolts or clips. The output shaft of the drive motor 7 extends into the interior of the main unit box 1 and is connected to the actuator for transmission. The drive motor 7 is used to drive the excitation force generated by the actuator.

[0021] The main unit box 1 has a guide groove 8, which extends along the length of the main unit box 1. The guide groove 8 is a columnar structure to ensure that the corresponding components in the actuator can perform stable reciprocating linear motion along the guide groove 8 without deviation.

[0022] The actuator includes a base 9, an output wheel 10, a crank 11, a connecting rod 12, a transmission sleeve 13, a limit block 14, and an impact rod 15. The base 9 is located inside the main unit box 1 and is fixedly connected to the bottom inner wall of the main unit box 1 by bolts. The output wheel 10 is connected to the output end of the drive motor 7. In actual use, the output wheel 10 can be fixedly installed on the output shaft of the drive motor 7 by key connection, spline connection, or interference fit. The output wheel 10 rotates synchronously with the output shaft of the drive motor 7. The crank 11 is rotatably connected to the base 9, and one side of the crank 11 is connected to the output wheel 10. The crank 11 and the output wheel 10 can be connected by an eccentric pin, that is, the rotation center of the crank 11 coincides with the rotation center of the output wheel 10. An eccentric journal is provided on the crank 11 near its periphery, and the eccentric journal is offset from the rotation center of the crank 11 by a certain distance. When the drive motor 7 drives the output wheel 10 to rotate, it will drive the crank 11 to rotate. A crank 11 is connected to a connecting rod 12. One end of the connecting rod 12 is rotatably connected to the eccentric journal of the crank 11 via a bearing or pin, and the other end is rotatably connected to a transmission sleeve 13 via a pin. This converts the rotational motion of the crank 11 into the reciprocating oscillation of the connecting rod 12, which in turn drives the transmission sleeve 13 to perform reciprocating linear motion. The connecting rod 12 is connected to the transmission sleeve 13, which is movably connected to the guide groove 8. When the crank 11 drives the connecting rod 12, the transmission sleeve 13 reciprocates along the guide groove 8, generating an excitation force. The transmission sleeve 13 has a limiting groove 16, which is axially oriented and is an elongated through-hole penetrating the wall of the transmission sleeve 13. A limiting block 14 is slidably disposed inside the limiting groove 16, and can only reciprocate along the length of the limiting groove 16, without radial displacement or deflection relative to the limiting groove 16. The limiting block 14 is connected to the impact rod 15. The limiting block 14 can be fixedly connected to the end of the impact rod 15 near the transmission sleeve 13 by threaded connection, welding, or integral molding. The impact rod 15 passes through the inside of the transmission sleeve 13, and the axis of the impact rod 15 coincides with the axis of the transmission sleeve 13. The impact rod 15 is connected to the end head 6. When the transmission sleeve 13 reciprocates along the guide groove 8, the transmission sleeve 13 pushes the limiting block 14 through the side wall of the limiting groove 16, thereby driving the impact rod 15 to reciprocate synchronously. The impact rod 15 transmits the excitation force to the end head 6. The length of the limiting groove 16 determines the maximum sliding stroke of the impact rod 15 relative to the transmission sleeve 13, thereby limiting the excitation amplitude of the end head 6 and preventing excessive excitation amplitude from damaging the camellia tree.

[0023] The end cap 6 is a C-shaped clamping component with an opening facing one side. The opening of the C-shaped structure is used to accommodate branches of the camellia tree. The inner wall of the C-shaped structure has a clamping working surface for applying clamping force to the branches under the drive of the adaptive clamping mechanism. The rear end of the C-shaped structure (i.e., the end closer to the main unit box 1) is fixedly connected to the end of the impact rod 15 away from the limiting block 14. The front end of the C-shaped structure (i.e., the opening end) extends away from the main unit box 1, making it easy for the operator to insert the branches into the opening of the C-shaped structure from the side. The C-shaped structure is made of high-strength aluminum alloy or engineering plastic, which reduces the overall weight while ensuring structural strength and reducing the labor intensity of the operator.

[0024] The linkage enhancement component includes a linkage mechanism, a mechanical energy conversion mechanism, and an adaptive clamping mechanism. The linkage mechanism is located between the main unit box 1 and the operating lever 2, and is used to absorb and buffer the vibration impact transmitted from the excitation component to the operating lever 2 along the excitation direction.

[0025] During the operation of the vibration assembly, the reciprocating vibration motion of the end head 6 generates a periodic reaction force along the vibration direction (i.e., the axial direction of the main unit box 1). This reaction force is transmitted to the operating lever 2 through the main unit box 1, causing the operator's hands to experience significant vibration impact. The linkage mechanism absorbs and buffers this reaction force through an elastic buffer element located between the main unit box 1 and the operating lever 2, reducing the vibration amplitude transmitted to the operating lever 2, effectively protecting the operator's hand health, and improving work comfort and operational safety.

[0026] The mechanical energy conversion mechanism is used to convert absorbed energy into driving force for the adaptive clamping mechanism. That is, the linkage mechanism will generate relative motion during the process of absorbing vibration and impact. The mechanical energy conversion mechanism collects and converts the mechanical energy of the relative motion into a power source to drive the adaptive clamping mechanism, realizing energy recovery and utilization. There is no need to set up an additional independent clamping drive power source, which simplifies the device structure and reduces manufacturing costs and energy consumption.

[0027] An adaptive clamping mechanism is located inside the end cap 6 and is used to clamp the branches of the camellia fruit. Driven by the mechanical energy conversion mechanism, the adaptive clamping mechanism automatically applies a clamping force to the branch that is inserted into the C-shaped opening of the end cap 6. The magnitude of the clamping force is adaptively adjusted according to the vibration intensity. That is, when the vibration intensity increases, the vibration energy absorbed by the linkage mechanism increases, the driving force output by the mechanical energy conversion mechanism increases accordingly, and the clamping force applied by the adaptive clamping mechanism also increases. This ensures that the end cap 6 always maintains a reliable clamping on the branch under high-frequency vibration conditions, preventing the end cap 6 from falling off the branch. When the vibration stops or decreases, the clamping force automatically decreases, making it easier for the operator to remove the end cap 6 from the branch.

[0028] The linkage mechanism includes a floating connecting seat 17, a retractable guide column, and a vibration isolation spring 19. The floating connecting seat 17 is fixedly mounted on the side of the main unit box 1 near the operating lever 2. The floating connecting seat 17 is fixedly connected to the rear end face of the main unit box 1 by bolts or welding. The floating connecting seat 17 has guide holes for engaging with the end of the retractable guide column, thus guiding and constraining the movement direction of the retractable guide column. One end of the retractable guide column is fixedly connected to the end of the operating lever 2, and the other end is connected to the floating connecting seat 17. The axial direction of the retractable guide column is parallel to the excitation direction (i.e., the length direction of the main unit box 1), thereby ensuring that the operating lever 2 and the main unit box 1 can only move relative to each other along the excitation direction, without any offset or oscillation perpendicular to the excitation direction. The vibration isolation spring 19 is sleeved on the outside of the retractable guide column, and is used to create a floating gap between the operating lever 2 and the main unit box 1 that allows for relative reciprocating movement. One end of the vibration isolation spring 19 abuts against the end face of the operating lever 2, and the other end of the vibration isolation spring 19 abuts against the end face of the floating connecting seat 17. When the reaction force generated by the excitation assembly is transmitted to the floating connecting seat 17 through the main unit box 1, the floating connecting seat 17 compresses the vibration isolation spring 19 and moves backward relative to the operating lever 2. The vibration isolation spring 19 undergoes elastic deformation to absorb vibration energy, thereby forming a floating gap between the operating lever 2 and the main unit box 1 that allows relative reciprocating motion. The size of this floating gap changes dynamically with the change of the excitation force, thus achieving effective buffering and isolation of vibration impact.

[0029] The retractable guide column includes a fixing part 20 and a sleeve part 21. The fixing part 20 is fixedly connected to the end of the operating rod 2. The fixing part 20 is a cylindrical rod, and the end of the fixing part 20 near the operating rod 2 is fixedly installed to the operating rod 2 by welding. The fixing part 20 extends forward along the excitation direction. The sleeve part 21 is connected to the main unit box 1 and is fixedly connected to the guide hole of the floating connecting seat 17. The sleeve part 21 is a cylindrical structure with a central through hole. The sleeve part 21 is sleeved on the outside of the fixing part 20. The end of the fixing part 20 away from the operating rod 2 extends into the central through hole of the sleeve part 21, and a sliding fit is formed between the outer wall of the fixing part 20 and the inner wall of the sleeve part 21, so that the fixing part 20 can reciprocate along the axial direction of the sleeve part 21.

[0030] The mechanical energy conversion mechanism includes a connecting rod 22, a double-sided rack 23, a transmission gear 24, a transmission rack 25, a piston rod 26, a piston rod 27, and a multi-cylinder piston cylinder 28. The connecting rod 22 is connected to a fixed part 20, with one end fixedly connected to the fixed part 20. The connecting rod 22 extends perpendicular to the excitation direction, and the other end is fixedly connected to the middle region of the double-sided rack 23. The connecting rod 22 is connected to the double-sided rack 23, which extends along the excitation direction. Both sides of the double-sided rack 23 have tooth surfaces extending along their length, and the two tooth surfaces are arranged opposite each other. The end of the double-sided rack 23 furthest from the connecting rod 22 is connected to the piston rod 26. One end of the piston rod 26 is fixedly connected to the front end of the double-sided rack 23 (i.e., the end furthest from the operating rod 2), and the piston rod 26 extends forward along the excitation direction and into the interior of the multi-cylinder piston cylinder 28. Two drive gears 24 are symmetrically arranged on both sides of the double-sided rack 23, meaning that two drive gears 24 are respectively located on both sides of the double-sided rack 23. The axes of the two drive gears 24 are perpendicular to the excitation direction and are parallel to each other. The drive gears 24 are rotatably connected to the main unit box 1 and are installed inside the main unit box 1 via rotating shafts and bearings. The rotation center of each drive gear 24 is fixed, but the drive gear 24 can rotate freely around its own axis. Each drive gear 24 meshes with the double-sided rack 23, meaning that the tooth surfaces on both sides of the double-sided rack 23 mesh with the teeth of the corresponding drive gear 24. When the double-sided rack 23 reciprocates along the excitation direction, it drives the two drive gears 24 to rotate synchronously in opposite directions. A transmission gear 24 is connected to a transmission rack 25, which is slidably connected in a groove 101 inside the main unit box 1. The groove 101 restricts the movement direction of the transmission rack 25. The transmission rack 25 is arranged perpendicular to the excitation direction, and the tooth surface of the transmission rack 25 meshes with the tooth portion of the transmission gear 24. The extension direction of the transmission rack 25 is perpendicular to the extension direction of the bidirectional rack 23. The transmission gear 24 drives the transmission rack 25 and the bidirectional rack 23 to move in opposite directions. When the fixing part 20 moves backward relative to the main unit box 1 with the operating lever 2, the fixing part 20 drives the bidirectional rack 23 to move backward through the connecting rod 22. The bidirectional rack 23 drives the two transmission gears 24 to rotate, and the two transmission gears 24 respectively drive the corresponding transmission rack 25 to move forward. That is, the movement direction of the transmission rack 25 is opposite to that of the bidirectional rack 23, thereby realizing the opposite movement of the bidirectional rack 23 and the transmission rack 25. A second piston rod 27 is connected to a transmission rack 25. One end of the second piston rod 27 is fixedly connected to the end of the transmission rack 25 away from the operating lever 2. The second piston rod 27 extends forward along the excitation direction and into the interior of the multi-cylinder piston cylinder 28. Both the first piston rod 26 and the second piston rod 27 are connected to the multi-cylinder piston cylinder 28.The multi-cylinder piston cylinder 28 is fixedly installed inside the main unit box 1. The multi-cylinder piston cylinder 28 has multiple piston chambers extending along the vibration direction. When the bidirectional rack 23 and the transmission rack 25 move in opposite directions, piston rod 1 26 and piston rod 27 respectively drive their corresponding pistons to move in opposite directions within their respective piston chambers in the multi-cylinder piston cylinder 28, thereby compressing or drawing air from the piston chambers to achieve gas delivery and pressure changes. The exhaust end of the multi-cylinder piston cylinder 28 is equipped with a one-way valve to ensure that gas can only be discharged from the multi-cylinder piston cylinder 28 to the outside and will not flow back in, thus converting vibration energy into pressure energy.

[0031] The adaptive clamping mechanism includes a hydraulic cylinder 29, an adjusting piston 30, a clamping cylinder 31, and a clamping block 32. The hydraulic cylinder 29 is located in the main unit box 1 and is fixedly installed inside the main unit box 1. The hydraulic cylinder 29 has a hydraulic chamber filled with hydraulic oil. The exhaust end of the multi-cylinder piston cylinder 28 is connected to the air chamber 34 of the hydraulic cylinder 29 via a pipe 33. One end of the pipe 33 is connected to the exhaust port of the multi-cylinder piston cylinder 28, and the other end is connected to the air inlet of the air chamber 34 of the hydraulic cylinder 29. The pipe 33 is a high-pressure resistant flexible hose. The adjusting piston 30 is movably connected to the air chamber 34 and slides inside the hydraulic cylinder 29. One side of the adjusting piston 30 is the air chamber 34, and the other side is the hydraulic chamber 35. The air chamber 34 and the hydraulic chamber 35 are isolated by the adjusting piston 30. The air chamber 34 is equipped with a pressure relief valve 3401, which is an electromagnetic pressure relief valve. When the pressure inside the air chamber 34 is too high, it releases pressure, ensuring that the clamping force on the branch is within a reasonable range (without damaging the branch). Simultaneously, the drive motor 7 and the pressure relief valve 3401 share a common main control MCU for logical linkage. When the drive motor 7 stops, an electrical signal drives the pressure relief valve 3401 to open. At this time, the pressure in the air chamber 34 decreases, and the adjusting piston 30 moves along the air chamber 34, thereby releasing the clamping block 32 from the branch. When the multi-cylinder piston cylinder 28 inputs pressurized air into the air chamber 34 through the pipe 33, the air pressure inside the air chamber 34 increases and pushes the adjusting piston 30 to move along the air chamber 34 towards the hydraulic chamber 35. The movement of the adjusting piston 30 reduces the volume of the hydraulic chamber 35, and the hydraulic oil in the hydraulic chamber 35 is pressurized and squeezed out of the hydraulic chamber 35. When the multi-cylinder piston cylinder 28 inputs air into the air chamber 34, it pushes the adjusting piston 30 to move along the air chamber 34, thereby inputting hydraulic oil into the clamping cylinder 31 and driving the clamping block 32 in the clamping cylinder 31 to extend. There are two clamping blocks 32, which are symmetrically arranged on both sides of the end head 6. The clamping end of the clamping block 32 (i.e. the surface in contact with the branch) is made of rubber material and has anti-slip texture. Since the driving force of the clamping cylinder 31 comes from the air pressure energy converted by the multi-cylinder piston cylinder 28, and the magnitude of the air pressure energy is positively correlated with the excitation intensity, the clamping force applied to the branch by the clamping block 32 can be adaptively adjusted with the change of excitation intensity, ensuring stable and reliable clamping under different excitation conditions.

[0032] The working principle of this invention is as follows: When harvesting camellia fruit, the operator first adjusts the operating rod 2 to a suitable length and locks it according to the working height using the length adjustment component. Then, the operator holds the operating rod 2 and aligns the C-shaped opening of the end head 6 with and inserts it into the camellia tree branch to be harvested.

[0033] Start the drive motor 7, which drives the output wheel 10 to rotate. The output wheel 10 converts the rotational motion into the reciprocating linear motion of the transmission sleeve 13 along the guide groove 8 through the crank 11 and connecting rod 12. The transmission sleeve 13 drives the impact rod 15 to perform high-frequency reciprocating motion through the limiting groove 16 and the limiting block 14. The impact rod 15 transmits the excitation force to the end head 6, applying high-frequency excitation to the camellia tree branches clamped in the end head 6, causing the camellia fruit to fall off the branches under the action of inertial force.

[0034] During the excitation process, the reaction force generated by the excitation component is transmitted to the floating connection seat 17 through the main unit box 1. The floating connection seat 17 compresses the vibration isolation spring 19 and floats back and forth relative to the operating lever 2. The vibration isolation spring 19 absorbs and buffers the vibration impact, reducing the vibration amplitude transmitted to the operating lever 2.

[0035] Meanwhile, the relative reciprocating motion between the operating lever 2 and the main unit box 1 is transmitted to the connecting rod 22 through the sliding fit of the fixed part 20 and the sleeve part 21. The connecting rod 22 drives the bidirectional rack 23 to reciprocate, and the bidirectional rack 23 drives the transmission rack 25 to move in opposite directions through the transmission gear 24, so that the piston rod 1 26 and the piston rod 27 generate opposing piston motion in the multi-cylinder piston cylinder 28. The multi-cylinder piston cylinder 28 compresses air and delivers it to the air chamber 34 of the hydraulic cylinder 29 through the pipe 33. The air pressure in the air chamber 34 pushes the regulating piston 30 to deliver hydraulic oil to the clamping cylinder 31 through the hydraulic oil pipe 36, driving the clamping block 32 to move towards the branch and apply a clamping force to the branch. When the excitation intensity increases, the gas output by the multi-cylinder piston cylinder 28 increases, and the clamping force applied by the clamping block 32 increases accordingly, ensuring that the end head 6 is always reliably clamped to the branch under high-frequency excitation.

[0036] 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 handheld vibratory harvesting device for camellia oleifera, characterized in that, include: A main unit box, with an operating lever connected to one side of the main unit box; A length adjustment component, wherein the length adjustment component is used to adjust the length of the operating lever; A vibration assembly is disposed in the main unit box. The vibration assembly includes an end head, a drive mechanism, and an actuator. The end head is used to clamp the branches of the camellia tree. The drive mechanism is used to drive the vibration force generated by the actuator. The actuator is connected to the end head. The linkage enhancement component includes a linkage mechanism, a mechanical energy conversion mechanism, and an adaptive clamping mechanism. The linkage mechanism is disposed between the main unit and the operating lever. The linkage mechanism is used to absorb and buffer the vibration impact transmitted from the excitation component to the operating lever along the excitation direction. The mechanical energy conversion mechanism is used to convert the absorbed energy into a driving force to drive the adaptive clamping mechanism. The adaptive clamping mechanism is disposed inside the end head and is used to clamp the branches of the camellia fruit. The linkage mechanism includes a floating connecting seat, a retractable guide column, and a vibration isolation spring. The floating connecting seat is fixedly disposed on the side of the main unit box near the operating rod. One end of the retractable guide column is fixedly connected to the end of the operating rod, and the other end of the retractable guide column is connected to the floating connecting seat. The vibration isolation spring is sleeved on the outside of the retractable guide column. The vibration isolation spring is used to form a floating gap between the operating rod and the main unit box that allows relative reciprocating motion. The retractable guide column includes a fixed part and a sleeve part. The fixed part is fixedly connected to the end of the operating rod, and the sleeve part is connected to the main unit box. The sleeve part is sleeved on the outside of the fixed part. The mechanical energy conversion mechanism includes a connecting rod, a double-sided rack, a transmission gear, a transmission rack, a piston rod one, a piston rod two, and a multi-cylinder piston cylinder. The connecting rod is connected to the fixed part and is connected to the double-sided rack. The end of the double-sided rack away from the connecting rod is connected to the piston rod one. The transmission gears are symmetrically arranged on both sides of the double-sided rack. The transmission gears are rotatably connected to the main unit box. Each transmission gear meshes with the double-sided rack. The transmission gears are connected to the transmission rack and are used to drive the transmission rack and the double-sided rack to move in opposite directions. The transmission rack is connected to the piston rod two. Both piston rod one and piston rod two are connected to the multi-cylinder piston cylinder. The adaptive clamping mechanism includes a hydraulic cylinder, an adjusting piston, a clamping cylinder, and clamping blocks. The hydraulic cylinder is located in the main unit box. The exhaust end of the multi-cylinder piston cylinder is connected to the air chamber of the hydraulic cylinder through a pipe. The adjusting piston is movably connected to the air chamber. The air chamber is equipped with a pressure relief valve. When the multi-cylinder piston cylinder inputs air into the air chamber, it pushes the adjusting piston to move along the air chamber, thereby inputting hydraulic oil into the clamping cylinder. The clamping cylinder is located at the end head and is connected to several clamping blocks.

2. The handheld tea oil vibrating harvesting device according to claim 1, characterized in that: The length adjustment assembly includes a telescopic tube, a locking sleeve, and a manual knob. The telescopic tube is fitted inside or outside the operating rod, and a sliding fit is formed between the telescopic tube and the operating rod, allowing the telescopic tube to slide relative to the operating rod along its axial direction. The locking sleeve is located at the connection between the operating rod and the telescopic tube, and the locking sleeve is equipped with a manual knob for allowing the telescopic tube to slide relative to the operating rod in the loose state and fixing the total length of the operating rod in the locked state.

3. The handheld tea oil vibrating harvesting device according to claim 1, characterized in that: The drive mechanism includes a drive motor, which is located on one side of the main unit box. The drive motor is used to drive the excitation force generated by the actuator.

4. The handheld tea oil vibrating harvesting device according to claim 3, characterized in that: The main unit box has a guide groove. The actuator includes a base, an output wheel, a crank, a connecting rod, a transmission sleeve, a limiting block, and an impact rod. The base is located inside the main unit box. The output wheel is connected to the output end of the drive motor. The crank is rotatably connected to the base, and one side of the crank is connected to the output wheel. When the drive motor drives the output wheel to rotate, it will drive the crank to rotate. The crank is connected to the connecting rod, and the connecting rod is connected to the transmission sleeve. The transmission sleeve is movably connected to the guide groove. When the crank drives the connecting rod to move, the transmission sleeve will reciprocate along the guide groove to generate excitation force. The transmission sleeve has a limiting groove, and the limiting block is movably connected to the limiting groove. The limiting block is connected to the impact rod, and the impact rod is connected to the end head.

5. The handheld tea oil vibrating harvesting device according to claim 1, characterized in that: The end cap has a C-shaped structure.

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