Three-cutterhead uniform cutting type bamboo cutting device

Abstract

The invention belongs to the technical field of agricultural machinery, discloses a three-cutter uniform cutting type bamboo cutting device, and particularly relates to the technical field of moso bamboo cutting in hilly and mountainous areas. The three-cutterhead uniform cutting type bamboo cutting device comprises a knife rest, a spring feeding structure and a three-cutterhead uniform cutting structure. The spring feeding structure achieves self-adaptive inward feeding of the three sets of disc saw blades at the trisection point positions of moso bamboos, the swing rod sliding block mechanism achieves that the three sets of disc saw blades are kept at the trisection point positions in the process of cutting the moso bamboos with different diameters, and the motor drives the three sets of disc saw blades to synchronously cut the moso bamboos through belt transmission. And the bamboo cutting device revolves around the circle center of the moso bamboo to cut the whole circle of the moso bamboo.

Description

Technical Field

[0001] This invention belongs to the field of agricultural machinery technology, specifically relating to a three-blade disc uniform cutting bamboo felling device. Background Technology

[0002] Moso bamboo, as an important fast-growing economic crop, is widely used in construction, papermaking, and furniture. In my country, moso bamboo production is mainly concentrated in the hilly and mountainous areas of the south. Due to the complex terrain and limited space in bamboo forests, conventional harvesting machinery has difficulty accessing the area, severely restricting the development of the moso bamboo industry. Traditional moso bamboo harvesting equipment typically harvests from one side of the bamboo. This method, due to stress concentration, easily leads to splitting and damage to bamboo nodes, affecting the yield and quality of the bamboo.

[0003] The patent with publication number CN201910505251.8 discloses a planetary bamboo felling equipment, which uses three sets of evenly distributed saw blades to perform ring cutting of moso bamboo and uses a spring mechanism to adaptively feed the outer diameter of the moso bamboo. However, it needs to be re-clamped each time it is felled, and the device is easily damaged when the moso bamboo is tilted due to uneven force. It has defects such as inconvenience in disassembly and assembly and cumbersome use steps.

[0004] The patent with publication number CN201910282197.5 discloses a bamboo cutting method. The method uses three sets of disc blades on a V-shaped blade holder to adaptively cut bamboo. A spring structure provides inward clamping force to the saw blade. However, when cutting bamboo of different diameters, the included angle of the V-shaped blade holder is inconsistent, and the cutting point is different for bamboo of different sizes. This makes it impossible to ensure uniform force during the cutting process and affects the cutting effect.

[0005] This invention presents a three-blade disc uniform cutting bamboo felling device, which proposes a three-blade disc uniform cutting bamboo felling equipment based on a swing rod slider feeding structure. It can uniformly envelop bamboo of various sizes and effectively solve the problem of uneven force during bamboo felling, thereby improving the quality and efficiency of bamboo felling. Summary of the Invention

[0006] The purpose of this invention is to provide a three-blade disc uniform cutting bamboo felling device, which provides a bamboo felling device for uniformly cutting and felling bamboo of various sizes along the circumference of the bamboo.

[0007] The three-blade disc uniform cutting bamboo felling device mainly includes a blade holder, a spring feed structure, and a three-blade disc uniform cutting structure.

[0008] The spring feed structure consists of a guide rail (21), a slider (22), a spring (23), a rocker arm (24), a connecting rod (25), and a slider connecting rod (26). Two sets of guide rails (21) are symmetrically mounted on the tool holder (1) about plane AA', with a distance of m between the two sets of guide rails (21) and plane AA'. The slider (22) is mounted on the guide rails (21) and can move in translational motion along the direction of the guide rails (21). One end of the spring (23) is fixed to the slider (22), and the other end is fixed to the tool holder (1). At point F on the upper part, the ends of the two sets of swing rods (24) are respectively installed at P1 and P2 of the knife holder (1), and can rotate around P1 and P2 respectively. One end of the connecting rod (25) is hinged to the slider (22), and the other end is hinged to point M on the swing arm (24). The slider (22), the swing rod (24), and the connecting rod (25) form the swing rod slider mechanism OMEF. The slider connecting rod (26) connects the left and right sliders (22) to ensure that the swing rod (24) rotates at the same angle during the cutting process, and the cutting amount on the left and right sides of the bamboo is consistent.

[0009] The three-blade uniform cutting structure consists of a motor (31), a primary pulley (32), a secondary pulley (33), a tertiary pulley (34), a transmission belt (35), a circular saw blade (36), and a rotating shaft (37). The motor (31) is fixedly connected to point O1 on the tool holder (1) to provide torque to the primary pulley (32). The primary pulley (32) is fixedly connected to the output shaft of the motor (31). The two sets of secondary pulleys (33) are respectively installed on the tool holder (1). At positions P1 and P2, two sets of three-stage pulleys (34) are respectively installed at positions O2 and O3 of the tool holder (1). The first-stage pulley (32), the second-stage pulley (33), and the third-stage pulley (34) transmit power through the transmission belt (35). Three sets of circular saw blades (36) with a diameter of d are respectively installed on the rotating shaft (37) fixed to the third-stage pulley (34) at positions O1, O2, and O3, and perform enveloping cutting of bamboo as the pulleys rotate.

[0010] The three-blade disc uniform cutting bamboo felling device operates on the principle of multi-size bamboo envelopment: the largest bamboo diameter is D. max At the point of maximum bamboo envelope, the tangent points of the three sets of circular saw blades (36) to the bamboo are the points where the circumference of the bamboo is divided into three equal parts. At this time, θ = 120°, and the centers of the three sets of circular saw blades (36) are at points O1, O2, and O3, respectively. At the point of minimum bamboo envelope, the three sets of circular saw blades (36) are tangent to each other. At this time, θ = 120°, and the centers of the three sets of circular saw blades (36) are at points O1, O2, and O3', respectively. O2O2' and O3O3' are the ideal feed trajectories. Perpendicular lines are drawn to O2O2' and O3O3', respectively. Points P1 and P2 are taken on the perpendicular lines. Arcs are drawn with radii O2P1 and O3P2, respectively, and centers P1 and P2. The radius of the arc is L. For the actual feed trajectory; when At that time, the edge trajectory of the circular saw blade (36) coincides before reaching the tangent point of the three saw blades, and the blade cannot reach the small envelope point; when At that time, the edge trajectory of the circular saw blade (36) did not overlap before reaching the tangent point of the three saw blades. When the circular saw blade (36) was fed to the position of the minimum envelope point, there was no interference between the circular saw blades (36). Due to the limitations of complex bamboo forest terrain and narrow space, the following was adopted: The positions of P1 and P2 serve as the rotation center of the swing rods (24) on both sides, so that the cutting point of the three sets of circular saw blades (36) is always near the trisection point of the bamboo when harvesting bamboo of different sizes. Attached Figure Description

[0011] Figure 1 The diagram shows a schematic of a three-blade disc uniform cutting bamboo felling device.

[0012] Figure 2 The diagram shown is a schematic diagram of the principle of a three-blade disc uniform cutting bamboo felling device;

[0013] Figure 3 The diagram shown is a simplified structural diagram of a three-blade disc uniform cutting bamboo felling device.

[0014] Figure 4 The diagram shown illustrates the working principle of a three-blade disc uniform cutting bamboo felling device.

[0015] In the diagram: 1--Tool holder, 21--Guide rail, 22--Slider, 23--Spring, 24--Swing arm, 25--Connecting rod, 26--Slider connecting rod, 31--Motor, 32--First-stage pulley, 33--Second-stage pulley, 34--Third-stage pulley, 35--Transmission belt, 36--Circular saw blade, 37--Shaft. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0017] refer to Figure 1 A uniform cutting bamboo felling device mainly includes a blade holder, a spring feed structure, and a three-blade disc uniform cutting structure.

[0018] refer to Figure 1 , Figure 2The spring feed structure consists of a guide rail (21), a slider (22), a spring (23), a rocker arm (24), a connecting rod (25), and a slider connecting rod (26). Two sets of guide rails (21) are symmetrically mounted on the tool holder (1) about plane AA', with a distance of m between the two sets of guide rails (21) and plane AA'. The slider (22) is mounted on the guide rail (21) and can move in translational motion along the direction of the guide rail (21). One end of the spring (23) is fixed to the slider (22), and the other end is fixed to the tool holder (1). At point F, the ends of the two sets of swing rods (24) are respectively installed at P1 and P2 of the knife holder (1), and can rotate around P1 and P2 respectively. One end of the connecting rod (25) is hinged to the slider (22), and the other end is hinged to point M on the swing arm (24). The slider (22), the swing rod (24), and the connecting rod (25) form the swing rod slider mechanism OMEF. The slider connecting rod (26) connects the left and right sliders (22) to ensure that the swing rod (24) rotates at the same angle during the cutting process, and the cutting amount on the left and right sides of the bamboo is consistent.

[0019] refer to Figure 1 The three-blade uniform cutting structure consists of a motor (31), a primary pulley (32), a secondary pulley (33), a tertiary pulley (34), a transmission belt (35), a circular saw blade (36), and a rotating shaft (37). The motor (31) is fixedly connected to point O1 on the blade holder (1) to provide torque to the primary pulley (32). The primary pulley (32) is fixedly connected to the output shaft of the motor (31). The two sets of secondary pulleys (33) are respectively installed on the blade holder (1). At positions P1 and P2, two sets of three-stage pulleys (34) are installed at positions O2 and O3 of the tool holder (1), respectively. The first-stage pulley (32), second-stage pulley (33), and third-stage pulley (34) transmit power through the transmission belt (35). Three sets of circular saw blades (36) with a diameter of d are installed at positions O1, O2, and O3 on the rotating shaft (37) which is fixed to the third-stage pulley (34), and perform enveloping cutting of bamboo as the pulleys rotate.

[0020] refer to Figure 3 The three-blade disc uniform cutting bamboo felling device uses a multi-size bamboo envelopment principle: the largest bamboo diameter is D. max At the point of maximum bamboo envelope, the tangent points of the three sets of circular saw blades (36) to the bamboo are the points where the circumference of the bamboo is divided into three equal parts. At this time, θ = 120°, and the centers of the three sets of circular saw blades (36) are at points O1, O2, and O3, respectively. At the point of minimum bamboo envelope, the three sets of circular saw blades (36) are tangent to each other. At this time, θ = 120°, and the centers of the three sets of circular saw blades (36) are at points O1, O2', and O3', respectively. O2O2' and O3O3' are the ideal feed trajectories. Perpendicular lines are drawn to O2O2' and O3O3', respectively. Points P1 and P2 are taken on the perpendicular lines. Arcs are drawn with radii of O2P1 and O3P2 and centers of P1 and P2, respectively. The radius of the arc is L. For the actual feed trajectory; when At that time, the edge trajectory of the circular saw blade (36) coincides before reaching the tangent point of the three saw blades, and the blade cannot reach the small envelope point; when At that time, the edge trajectory of the circular saw blade (36) did not overlap before reaching the tangent point of the three saw blades. When the circular saw blade (36) was fed to the position of the minimum envelope point, there was no interference between the circular saw blades (36). Due to the limitations of complex bamboo forest terrain and narrow space, the following was adopted: The positions of P1 and P2 serve as the rotation center of the swing rods (24) on both sides, so that the cutting point of the three sets of circular saw blades (36) is always near the trisection point of the bamboo when harvesting bamboo of different sizes.

[0021] refer to Figure 4 The working principle of the three-blade disc uniform cutting bamboo felling device is as follows: In state a, the spring (23) is in the maximum tensile deformation state. At this time, the distance between adjacent disc saw blades (36) reaches the maximum value, allowing the bamboo to smoothly enter the bamboo felling device from the gap between the two sets of disc saw blades (36) at the front end; In state b, the pulling force of the spring (23) causes the slider (22) to drive the disc saw blades (36) to feed inward until they are tangent to the outside of the bamboo. At this time, the three sets of disc saw blades (36) are tangent to the bamboo near the three equal division points, realizing the uniform cutting of the bamboo. The bamboo is evenly enclosed, and the spring (23) provides the saw blade with a feeding force towards the center of the bamboo through the tension of the spring (23). In state c, the circular saw blade (36) connected to the motor (31) feeds towards the bamboo. At the same time, the spring (23) retracts and drives the two sets of circular saw blades (36) on the front side to feed towards the inside of the bamboo through the slider (22), so as to realize the coordinated cutting operation of the three sets of saw blades at the three equal division points of the bamboo circumference. In state d, the bamboo cutting device is rotated 120° around the bamboo axis to achieve the whole circumference cutting of the bamboo, thus completing the bamboo harvesting process.

[0022] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed, and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. The scope of this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described application concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A three-blade disc uniform cutting bamboo felling device, characterized in that: Tool holder, spring feed structure, three-blade disc uniform cutting structure; The spring feed structure comprises a guide rail, a slider, a spring, a rocker arm, and a connecting rod. Two sets of guide rails are symmetrically mounted on the tool holder about plane AA', with a distance of m between the two sets of guide rails and plane AA'. The slider is mounted on the guide rail and can move in translational motion along the guide rail direction. One end of the spring is fixed to the slider, and the other end is fixed to point F on the tool holder. The ends of the two sets of rocker arms are respectively mounted at points P1 and P2 on the tool holder and can rotate around points P1 and P2 respectively. One end of the connecting rod is hinged to the slider, and the other end is hinged to point M on the rocker arm. The slider, rocker arm, and connecting rod form a rocker arm slider mechanism OMEF. The slider connecting rod connects the left and right sliders to ensure that the rocker arm rotates at the same angle during the cutting process, and the cutting amount on the left and right sides of the bamboo is consistent. The three-blade uniform cutting structure comprises a motor, a primary pulley, a transmission gear, a secondary pulley, a tertiary pulley, a transmission belt, circular saw blades, and a rotating shaft. The motor is fixedly connected to point O1 on the blade holder, providing torque to the primary pulley, which is also fixedly connected to the motor's output shaft. Two sets of secondary pulleys are respectively installed at positions P1 and P2 on the blade holder, and two sets of tertiary pulleys are respectively installed at positions O2 and O3 on the blade holder. The primary, secondary, and tertiary pulleys transmit power through the transmission belt. Three circular saw blades with a diameter of d are respectively installed at points O1, O2, and O3 on the rotating shaft fixedly connected to the tertiary pulleys, and perform adaptive uniform cutting of the bamboo into three equal parts as the pulleys rotate.

2. The three-blade disc uniform cutting bamboo felling device according to claim 1, characterized in that: Let the diameter of the largest bamboo be D. max At the point where the bamboo envelope is at its largest size, the tangent points of the three sets of circular saw blades to the bamboo are the points that divide the circumference of the bamboo into three equal parts. At this point, θ = 120°, and the centers of the three sets of circular saw blades are located at points O1, O2, and O3, respectively. At the point where the bamboo envelope is at its smallest size, the three sets of circular saw blades are tangent to each other in pairs. At this point, θ = 120°, and the centers of the three sets of circular saw blades are located at points O1, O2', and O3', respectively. O2O2' and O3O3' are the ideal feed trajectories. Perpendicular lines are drawn to O2O2' and O3O3', respectively. Points P1 and P2 are taken on these perpendicular lines. Arcs are drawn with radii O2P1 and O3P2, respectively, and centers P1 and P2. The radius of the arc is L. For the actual feed trajectory; when At that time, the edge trajectory of the circular saw blade coincides before reaching the point of tangency of the three saw blades, and the blade cannot reach the small envelope point; when At that time, the edge trajectories of the circular saw blades did not overlap before reaching the tangent point of the three saw blades. When the circular saw blades were fed to the minimum envelope point, there was no interference between the circular saw blades. Due to the limitations of complex terrain and narrow space in bamboo forests, [the following text is incomplete and requires further context to translate accurately]. The positions of P1 and P2 serve as the rotation centers of the swing arms on both sides, ensuring that the cutting points of the three sets of circular saw blades are always near the trisection points of the bamboo when harvesting bamboo of different sizes.

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