Impact type adjustable shear force pruning device

Abstract

The utility model relates to a garden and landscape machinery, which is an impact type adjustable shear force pruning device. The housing, motor frame and support are fixed on the seat plate. The power driving mechanism composed of motor, eccentric wheel, push rod, shaft plate, push plate, L-shaped top block and compression spring B is installed on the motor frame and support. The impact force adjusting mechanism composed of top plate, adjusting handle, screw rod, impact pressure adjusting plate and compression spring A is installed on the housing from top to bottom. The impact mechanism composed of impact mass, limiting rod, compression spring C, butterfly adjusting nut, limiting block and connecting rod. The shearing mechanism composed of hinge pin, shearing fixed blade and shearing moving blade. The device has novel, unique and reasonable structure, strong applicability, small damage to trees during pruning operation, high pruning efficiency, good quality and labor-saving operation.

Description

Technical Field

[0001] This invention belongs to the field of horticultural and garden machinery, and mainly relates to a tree pruning device with adjustable impact shearing force. Background Technology

[0002] In the field of horticulture and landscaping, tree pruning is an indispensable part of maintaining plant health, promoting growth, and optimizing fruit yield. While traditional manual pruning tools are flexible, they are often inefficient and labor-intensive when dealing with large numbers of stiff or hard-to-reach branches. Furthermore, different plant species and branches require different pruning strengths to ensure effective removal of unwanted parts without causing excessive damage to the tree. Therefore, there is a growing market demand for advanced pruning tools that can automatically adjust pruning force, improve work efficiency, and protect plant health. Summary of the Invention

[0003] The purpose of this invention is to address the problems existing in the prior art and, in combination with the actual needs of current horticulture and landscaping for pruning fruit trees and other trees, to develop and design an impact-type adjustable shearing force pruner, which achieves the goals of strong applicability, reduced damage to trees, high pruning efficiency, good quality, and labor-saving operation.

[0004] The objective of this invention is achieved as follows: a housing, a motor frame, and a bracket are sequentially fixed on a base plate. The motor is fixed on the motor frame, and an eccentric wheel is fixed on the motor shaft. A shaft plate is fixed on the bracket. A push rod is reciprocally inserted into the shaft plate. An L-shaped top block and a push plate are fixed on the upper and lower ends of the push rod, respectively. A compression spring B is fitted on the lower side of the push rod, between the lower part of the shaft plate and the upper part of the push plate. The push plate and the eccentric wheel are in a compression contact support engagement. A bracket is fixed on the lower front part of the front end face of the housing. A fixed shearing blade is rotatably hinged to the fixed shearing blade via a hinge pin. A limiting block is fixed on the upper part of the right end face of the housing. A top plate is fixed to the upper end face of the housing. An adjusting handle is axially and radially positioned and rotatably mounted on the top plate. A screw is fixed on the lower end of the adjusting handle, located inside the housing cavity. An impact pressure adjusting plate is rotatably suspended on the screw. An impact mass block is inserted into the housing cavity, located below the impact pressure adjusting plate, and can reciprocate up and down. A limiting rod is inserted into the cavity of the impact mass block, allowing horizontal reciprocating movement. The left and right ends of the limiting rod are respectively inserted into vertical sliding holes on the left and right side panels of the housing, allowing vertical reciprocating movement. The inclined upper surface of the right end of the limiting rod is in contact with or disengagement from the inclined lower surface of the limiting block. The bottom plane of the right end of the limiting rod is in contact with or disengagement from the upper plane of the L-shaped top block. The bottom plane of the right end of the limiting rod is also in contact with or disengagement from the bottom surface of the vertical sliding hole on the right side panel of the housing. The left end of the limiting rod... A wing-shaped adjusting nut is screwed on, and the wing-shaped adjusting nut is in contact with the left side panel of the housing for positioning. A compression spring C is fitted on a limiting rod, and the right end face of the compression spring C is axially positioned on the limiting rod. The left end face of the compression spring C is in extrusion contact with the inner wall of the left side panel of the housing. A compression spring A is fitted on the part between the lower part of the impact pressure adjusting plate and the upper part of the impact mass block. A connecting rod is fixed on the lower side of the impact mass block. The lower side of the connecting rod can be reciprocated and inserted into the elongated hole of the shearing power plate. This constitutes an impact-type shearing force adjustable pruner.

[0005] This invention utilizes the principle of inertial impact, employing a motor as a power source. Through a rational mechanical structure design, kinetic energy is transferred to the impact mass block. When the impact mass block reaches the preset position, a release mechanism rapidly releases its accumulated energy, generating a strong impact force that acts on the shear blade, instantly severing the branch. Furthermore, the impact force can be adjusted by regulating the spring preload acting on the impact mass block. This invention features a novel, unique, and rational structure, strong applicability, minimal damage to trees during pruning, high pruning efficiency, good quality, and labor-saving operation. Attached Figure Description

[0006] Figure 1 This is a three-dimensional schematic diagram of the overall structure of an impact-type adjustable shearing force pruner;

[0007] Figure 2 This is a two-dimensional cross-sectional schematic diagram of the overall structure of the impact shearing force adjustable pruning shearer;

[0008] Figure 3 This is an exploded view of the overall structure of an impact-type adjustable shearing force pruner;

[0009] Figure 4 yes Figure 3 Enlarged view of section A.

[0010] Part number description in the image:

[0011] 1. Seat plate, 2. Housing, 3. Hinge pin, 4. Fixed shear blade, 5. Moving shear blade, 6. Connecting rod, 7. Impact mass block, 8. Butterfly adjusting nut, 9. Limiting rod, 10. Compression spring A, 11. Impact pressure adjusting plate, 12. Screw, 13. Top plate, 14. Adjusting handle, 15. Limiting block, 16. L-shaped top block, 17. Shaft plate, 18. Push plate, 19. Eccentric wheel, 20. Motor frame, 21. Bracket, 22. Push rod, 23. Compression spring B, 24. Compression spring C, 25. Motor. Detailed Implementation

[0012] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. An impact-type adjustable shearing force pruner comprises a housing 2, a motor frame 20, and a support 21 sequentially fixed on a base plate 1. A motor 25 is fixed on the motor frame 20, and an eccentric wheel 19 is fixed on the motor shaft of the motor 25. A shaft plate 17 is fixed on the support 21. A push rod 22 is reciprocally inserted into the shaft plate 17. An L-shaped top block 16 and a push plate 18 are fixed to the upper and lower ends of the push rod 22, respectively. A compression spring B23 is fitted on the lower side of the push rod 22, between the lower part of the shaft plate 17 and the upper part of the push plate 18. The push plate 18 and the eccentric wheel 19 are in compressive contact. A shearing fixed blade 4 is fixedly mounted on the lower front part of the front end face of the housing 2. A shearing moving blade 5 is rotatably hinged to the shearing fixed blade 4 via a hinge pin 3. A limiting block 15 is fixedly mounted on the upper part of the right end face of the housing 2. A top plate 13 is fixedly mounted on the upper end face of the housing 2. An adjusting handle 14 is axially and radially positioned and rotatably mounted on the top plate 13. A screw 12 is fixedly mounted on the lower end of the adjusting handle 14, located inside the cavity of the housing 2. An impact pressure adjusting plate 11 is rotatably suspended on the screw 12. An impact pressure adjusting plate 11 is rotatably mounted inside the cavity of the housing 2. An impact mass block 7 is inserted into the lower part of the adjusting plate 11, which can move up and down reciprocally. A limiting rod 9 is inserted into the cavity of the impact mass block 7, which can move horizontally and reciprocally. The left and right ends of the limiting rod 9 can be inserted into the vertical sliding holes on the left and right side panels of the housing 2, respectively, which can move up and down reciprocally. The inclined upper end face of the right end of the limiting rod 9 is in contact with or out of contact with the inclined lower end face of the limiting block 15. The bottom plane of the right end of the limiting rod 9 is in contact with or out of contact with the upper plane of the L-shaped top block 16. The bottom plane of the right end of the limiting rod 9 is also in contact with and limited by the bottom surface of the vertical sliding hole on the right side panel of the housing 2. Alternatively, the contact engagement can be disengaged. A butterfly adjusting nut 8 is screwed onto the left end of the limiting rod 9. The butterfly adjusting nut 8 is in contact with the left side wall of the housing 2 for positioning. A compression spring C24 is fitted onto the limiting rod 9. The right end face of the compression spring C24 is axially positioned on the limiting rod 9. The left end face of the compression spring C24 is in compression contact with the inner wall of the left side wall of the housing 2. A compression spring A10 is fitted onto the part between the lower part of the impact pressure adjusting plate 11 and the upper part of the impact mass block 7. A connecting rod 6 is fixed on the lower side of the impact mass block 7. The lower side of the connecting rod 6 can be reciprocated and inserted into the elongated hole of the shearing power plate 5.

[0013] During operation, the starter motor 25 drives the eccentric wheel 19 to rotate. The push rod 22, under the combined action of the push plate 18, the eccentric wheel 19, and the compression spring B23, drives the L-shaped top block 16 to reciprocate up and down. When the L-shaped top block 16 moves upward, it pushes the limit rod 9 and simultaneously drives the impact mass block 7 to complete its upward lifting motion. At this time, the connecting rod 6 drives the shearing blade 5 to rotate around the hinge pin 3 relative to the shearing fixed blade 4. The compression spring A10, located between the impact pressure adjusting plate 11 and the impact mass block 7, is compressed and its pressure increases. When the upper inclined surface of the right end of the limit rod 9 contacts the lower inclined surface of the limit block 15, the limit block 15 pushes the limit rod 9 to move to the left within the impact mass block 7. The compression spring C24 increases its pressure, and the limit rod 9 disengages from the support of the L-shaped top block 16. The impact mass block 7, under its own weight and the preload of the compression spring A10, moves rapidly downward, driven forcefully and quickly by the connecting rod 6. The shearing blade 5 performs a shearing action in conjunction with the shearing fixed blade 4 to cut the branches. Simultaneously, during the downward movement, the limiting rod 9 moves rapidly to the right laterally under the action of the compression spring C24 and contacts the bottom surface of the vertical sliding hole on the right side wall of the housing 2, completing the lowest position limiting engagement. At the same time, the butterfly adjusting nut 8 limits the lateral movement position of the limiting rod 9 to the right. During the downward movement of the L-shaped top block 16, when the lower inclined surface of the L-shaped top block 16 contacts the inclined upper surface of the right end of the limiting rod 9, the L-shaped top block 16 pushes the limiting rod 9 to move to the left again. The compressive force of the compression spring C24 increases until the upper plane of the L-shaped top block 16 is completely below the bottom plane of the right end of the limiting rod 9. Then, under the action of the compression spring C24, the limiting rod 9 moves rapidly to the right laterally again. The upper plane of the L-shaped top block 16 once again makes supporting contact engagement with the bottom plane of the right end of the limiting rod 9. The motor 25 is started again to complete the above actions, and the operation is repeated in a cycle.

[0014] Depending on the different cutting forces of different branches, the adjustment handle 14 is turned by hand, which drives the screw 12 to adjust the upper and lower positions of the impact pressure adjustment plate 11 in the housing 2, thereby changing the squeezing force on the compression spring A10 and adjusting the impact force on the impact mass block 7 to adapt to and meet the different branch cutting needs.

Claims

1. An impact-type adjustable shearing force pruner, characterized in that: A housing (2), a motor frame (20), and a bracket (21) are sequentially fixed on a base plate (1). A motor (25) is fixed on the motor frame (20). An eccentric wheel (19) is fixed on the motor shaft of the motor (25). A shaft plate (17) is fixed on the bracket (21). A push rod (22) is inserted into the shaft plate (17) and can move up and down reciprocally. An L-shaped top block (16) and a push plate (18) are fixed on the upper and lower ends of the push rod (22), respectively. A compression spring B (23) is fitted on the lower side of the push rod (22) between the lower part of the shaft plate (17) and the upper part of the push plate (18). The push plate (18) and the eccentric wheel (19) are in a pressing contact support cooperation. A shearing fixed blade (4) is fixedly mounted on the lower front part of the front end face of the housing (2). A shearing moving blade (5) is rotatably hinged to the shearing fixed blade (4) by a hinge pin (3). A limiting block (15) is fixedly mounted on the upper part of the right end face of the housing (2). A top plate (13) is fixedly mounted on the upper end face of the housing (2). An adjusting handle (14) is axially and radially positioned and rotatably mounted on the top plate (13). A screw (12) is fixedly mounted on the lower end of the adjusting handle (14) at a position inside the cavity of the housing (2). An impact pressure adjusting plate (11) is rotatably suspended on the screw (12). An impact pressure adjusting plate (11) is rotatably mounted inside the cavity of the housing (2). An impact mass block (7) is inserted into the lower part of the force adjustment plate (11) and can be moved up and down. A limiting rod (9) is inserted into the cavity of the impact mass block (7) and can be moved horizontally. The left and right ends of the limiting rod (9) can be moved up and down and are respectively inserted into the vertical sliding holes on the left and right side panels of the housing (2). The inclined upper end face of the right end of the limiting rod (9) is in contact with or out of contact with the inclined lower end face of the limiting block (15). The bottom plane of the right end of the limiting rod (9) is in contact with or out of contact with the upper plane of the L-shaped top block (16). The bottom plane of the right end of the limiting rod (9) is also in contact with or out of contact with the bottom surface of the vertical sliding hole on the right side panel of the housing (2). In conjunction with this, a butterfly adjusting nut (8) is screwed onto the left end of the limiting rod (9). The butterfly adjusting nut (8) is in contact with the left side wall of the housing (2). A compression spring C (24) is fitted onto the limiting rod (9). The right end face of the compression spring C (24) is axially positioned on the limiting rod (9). The left end face of the compression spring C (24) is in extrusion contact with the inner wall of the left side wall of the housing (2). A compression spring A (10) is fitted onto the part between the lower part of the impact pressure adjusting plate (11) and the upper part of the impact mass block (7). A connecting rod (6) is fixed on the lower side of the impact mass block (7). The lower side of the connecting rod (6) is reciprocally inserted into the elongated hole of the shearing blade (5).

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