Self-adaptive tensioning improved clamping mechanism facilitating garlic seedling cutting

Abstract

The invention discloses a self-adaptive tensioning improved clamping mechanism facilitating garlic seedling cutting, and belongs to the technical field of garlic harvesting equipment. In order to solve the problem that a chain in a sectional type guiding and conveying assembly is extruded by garlic bulbs to be loosened and then falls off, an elastic self-adaptive tensioning mechanism is additionally arranged on a chain clamping mechanism and comprises a sliding movable rod in a fixed rod, an L-shaped movable plate and a pre-tightening spring. When garlic is squeezed into the chain, radial force pushes the movable rod to move outwards to compress the spring; after the garlic head passes, the spring automatically resets to enable the movable rod to pull the driven shaft back, and real-time dynamic balance of chain tension is achieved. The problem that garlic bulbs fall off is thoroughly solved, shutdown adjustment is not needed, and the harvesting efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of garlic harvesting equipment, in particular to an improved clamping mechanism with adaptive tensioning for facilitating cutting of garlic seedlings. Background Art

[0002] The applicant's patent application 2024114443634 discovered the following problems during the test process: 1. When the clamping mechanism holds the garlic sprouts and continues to lift them, the garlic heads always move close to the bottom of the mechanism. When the garlic plants reach the cutting station at the end, the cutter can easily scratch the surface bulbs, causing irreversible damage.

[0003] 2. To increase the distance between the garlic bulb and the clamping mechanism, the applicant's initial improvement proposal was to add an inclined, fixed dual guide rail at the bottom of the middle and rear sections of the clamping mechanism. However, to achieve a sufficiently large distance between the garlic bulb and the clamping mechanism, a longer guide rail was required. The cumulative sliding friction between the static guide rail and the moving garlic bulb would cause scratches on the garlic's skin. However, if the guide rail was shortened, sufficient distance would not be achieved. Therefore, the applicant developed a dynamic clamping guide mechanism that frictionlessly increases the distance between the garlic bulb and the clamping end while maintaining the stable lifting of the garlic plant, providing a safe operating space for the cutting process.

[0004] However, a new problem emerged during development. When densely packed garlic plants (especially those with a diameter greater than 7cm) squeezed into the chain gaps, the chain expanded outward due to radial forces. The traditional rigidly fixed driven shaft couldn't adapt to these displacements, causing the chain to momentarily slack and slip. This resulted in 5%-10% of garlic bulbs falling off or interrupting feed. The conventional industry solution was to add a bolt-adjustable tensioner to the driven shaft. However, this presented a fundamental problem: the bolt's fixed preload couldn't respond to the chain's changing tension requirements. Furthermore, manual intervention was lagging, requiring over 3 minutes per stop to adjust the tension, significantly reducing harvesting efficiency.

[0005] Therefore, it is urgent to develop a dynamic adaptive tensioning mechanism to compensate for the deformation displacement of the chain caused by garlic extrusion in real time while maintaining synchronous operation and zero friction guidance. Summary of the Invention

[0006] In order to make up for the deficiencies in the prior art, the present invention provides an improved clamping mechanism with adaptive tensioning for facilitating cutting of garlic seedlings.

[0007] An improved clamping mechanism with adaptive tensioning for cutting garlic seedlings, including an original clamping mechanism, is characterized by: A segmented guiding assembly is added to the bottom of the middle and rear part of the original clamping mechanism, and the segmented guiding assembly includes a guide rod obliquely installed at the bottom of the original clamping mechanism, and a chain clamping mechanism inclined at the same angle is provided at the end of the guide rod. The movement speed of the chain clamping mechanism is equivalent to that of the original clamping mechanism; an adaptive tensioning mechanism is provided on the chain clamping mechanism, and the adaptive tensioning mechanism tensions the chain when the chain clamping mechanism clamps the garlic sprouts.

[0008] Furthermore, in order to better implement the present invention, the chain clamping mechanism is composed of a driving shaft, a driven shaft and a chain surrounding the two, and the inlet section of the chain clamping mechanism is connected to the outlet end of the guide rod.

[0009] Furthermore, in order to better realize the present invention, the driving shaft is installed on the driving shaft mounting seat, and the top of the driving shaft synchronizes the rotation speed of the synchronous belt of the original clamping mechanism through the gear transmission mechanism. The driving shaft mounting seat is fixedly connected to the top of the mounting plate of the original clamping mechanism, and the driving shaft extends downward through the mounting plate. A fixed rod is also fixedly connected to the bottom of the mounting plate. A sleeve is provided at one end of the fixed rod to connect the driving shaft. The center of the fixed rod is set as a hollow tube, and the other end is slidably connected to the movable rod. A sleeve is provided at the end of the movable rod to connect the driven shaft. A chain is connected to the bottom of the driven shaft and the driving shaft.

[0010] Furthermore, in order to better realize the present invention, an adaptive tensioning mechanism is installed at the bottom of the fixed rod, and the adaptive tensioning mechanism includes a notch opened at the bottom of the fixed rod, and a movable L-shaped movable plate is provided at the notch. The L-shaped movable plate is fixedly connected to the movable rod by bolts or welding, and a stud is fixedly connected to the L-shaped movable plate, a nut is connected to the stud, and a spring is sleeved on the stud, one end of the spring abuts against the nut, and the other end of the spring abuts against the fixed plate, and the fixed plate is fixedly connected to the fixed rod.

[0011] Furthermore, in order to better implement the present invention, the nut can be rotated to change its position on the stud, thereby changing the pressure of the spring and controlling the tension of the chain.

[0012] Furthermore, in order to better implement the present invention, the guide rods are two stainless steel rods arranged at intervals, and the distance between the two guide rods gradually decreases from the inlet end to the outlet end to form a garlic guide channel.

[0013] The beneficial effects of the present invention are: 1. Dynamically respond to chain tension fluctuations, the spring preload compensates for the radial expansion and displacement of the chain in real time, ensuring that the chain remains taut and the rate of chain shedding is minimized.

[0014] 2. Continuous operation with zero manual intervention, the adaptive tensioning process is completed instantly, there is no need to stop the machine to adjust the bolts, and the per-acre yield efficiency is improved.

[0015] 3. The spring travel is highly adaptable to the garlic diameter range of 4-10cm, and the preload force is steplessly adjusted by the nut to adapt to the specifications of garlic from different production areas. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 This is the second schematic diagram of the three-dimensional structure of the present invention; Figure 3 This is a schematic diagram of a partial structure of the tensioning component of the present invention; Figure 4 This is the second schematic diagram of the partial structure of the tensioning component of the present invention.

[0017] In the figure, 1. Original clamping mechanism, 2. Active shaft mounting seat, 3. Active shaft, 4. Fixed rod, 5. Movable rod, 6. Driven shaft, 7. Chain, 8. Adaptive tensioning mechanism, 801. L-shaped movable plate, 802. Stud, 803. Nut, 804. Spring, 805. Fixed plate. DETAILED DESCRIPTION

[0018] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in a variety of different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely intended to represent selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.

[0020] Figure 1-Figure 4 This is a specific embodiment of the present invention, which is an improved clamping mechanism with adaptive tensioning for cutting garlic seedlings. It includes the following components: Transmission components: The fixed rod 4 (hollow square steel 40×40mm) is welded to the bottom of the mounting plate, and its right end sleeve is connected to the driving shaft 3; the left end of the movable rod 5 (solid square steel 30×30mm) is inserted into the inner cavity of the fixed rod 4, and the clearance fit allows axial sliding; the driven shaft 6 is connected to the right end of the movable rod 5 through a bearing, and the chain 7 is tensioned between the driving shaft 3 and the driven shaft 6.

[0021] Tensioning actuator: A 30mm wide × 150mm long slot is opened at the bottom of the fixing rod 4; the movable rod 5 is welded vertically to the L-shaped movable plate 801, and its vertical plate passes through the slot; the stud 802 is welded to the vertical plate of the L-shaped movable plate 801; the spring 804 is sleeved on the stud 802; the fixing plate 805 is welded to the end face of the fixing rod 4, the right end of the spring 804 abuts the fixing plate 805, and the left end is pre-tightened by the nut 803.

[0022] The working process of this embodiment is as follows: Normal state: Spring 804 pushes L-shaped plate 801 to the left → movable rod 5 tightens driven shaft 6 → chain 7 tension = 300N (adjusted by nut 803); Garlic squeezing: Chain 7 expands due to radial force → pushes driven shaft 6 to the right → movable rod 5 drives L-shaped plate 801 to compress spring 804 → maximum displacement 15mm (spring force increases to 500N); When the garlic passes through: radial force disappears → spring 804 resets → movable rod 5 moves left → chain 7 recovers initial tension.

[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention and are not limiting. Other modifications or equivalent substitutions made to the technical solution of the present invention by ordinary technicians in this field should be included in the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. An improved clamping mechanism with adaptive tensioning for cutting garlic seedlings, comprising an original clamping mechanism (1), characterized in that: A segmented guide assembly is added to the bottom of the middle and rear part of the original clamping mechanism (1), and the segmented guide assembly includes a guide rod obliquely installed at the bottom of the original clamping mechanism (1), and a chain clamping mechanism inclined at the same angle is provided at the end of the guide rod. The movement speed of the chain clamping mechanism is equal to that of the original clamping mechanism (1); an adaptive tensioning mechanism (8) is provided on the chain clamping mechanism, and the adaptive tensioning mechanism (8) tensions the chain when the chain clamping mechanism clamps the garlic sprouts.

2. The improved clamping mechanism for garlic cutting with adaptive tensioning according to claim 1 is characterized in that: The chain clamping mechanism is composed of a driving shaft (3), a driven shaft (6), and a chain (5) surrounding the two, and an inlet section of the chain clamping mechanism is connected to an outlet end of the guide rod.

3. The improved clamping mechanism for garlic cutting with adaptive tensioning according to claim 2 is characterized in that: The driving shaft (3) is mounted on the driving shaft mounting seat (2). The top of the driving shaft (3) synchronizes the rotation speed of the synchronous belt of the original clamping mechanism (1) through a gear transmission mechanism. The driving shaft mounting seat (2) is fixedly connected to the top of the mounting plate of the original clamping mechanism (1). The driving shaft (3) extends downward through the mounting plate. A fixed rod (4) is also fixedly connected to the bottom of the mounting plate. A shaft sleeve is provided at one end of the fixed rod (4) to be sleeved with the driving shaft (3). The center of the fixed rod (4) is set as a hollow tube and is slidably connected to a movable rod (5) at the other end. A shaft sleeve is provided at the end of the movable rod (5) to be sleeved with a driven shaft (6). A chain (7) is connected to the bottom of the driven shaft (6) and the driving shaft (3).

4. The improved clamping mechanism for garlic cutting with adaptive tensioning according to claim 3 is characterized in that: An adaptive tensioning mechanism (8) is installed at the bottom of the fixed rod (4). The adaptive tensioning mechanism (8) includes a notch opened at the bottom of the fixed rod (4). A movable L-shaped movable plate (801) is provided at the notch. The L-shaped movable plate (801) is fixedly connected to the movable rod (5) by bolts or welding. A stud (802) is fixedly connected to the L-shaped movable plate (801). A nut (803) is connected to the stud (802). A spring (804) is sleeved on the stud (802). One end of the spring (804) abuts against the nut (803), and the other end of the spring (804) abuts against the fixed plate (805). The fixed plate (805) is fixedly connected to the fixed rod (4).

5. The improved clamping mechanism for garlic cutting with adaptive tensioning according to claim 4 is characterized in that: The nut (803) can be rotated to change its position on the stud (802), thereby changing the pressure of the spring (804) and controlling the tension of the chain (7).

6. The improved clamping mechanism for garlic seedling cutting with adaptive tensioning according to claim 1 is characterized in that: The guide rods are two stainless steel rods arranged at intervals, and the distance between the two guide rods gradually decreases from the inlet end to the outlet end to form a garlic guide channel.

Images