A rubber tapping knife

Abstract

The present invention discloses a rubber tapping knife. The rubber tapping knife includes a base, and a driving motor is arranged inside the base. The driving motor can drive a driving pulley on the outer sidewall of the base to rotate through a gear member inside the base. The root of a swing arm is hinged to a stud on the outer sidewall of the base, and a torsion spring is sleeved on the stud. A rotatable cutter head is arranged at the head of the swing arm, a blade is installed on the cutter head, and a driven pulley is fixedly installed on one side of the cutter head. The driven pulley is in transmission connection with the above-mentioned driving pulley through a belt. The rubber tapping knife disclosed by the present invention can quickly cut the remaining rubber threads while quickly rotating the cutter head by driving of the motor to tap the rubber tree bark by rotary cutting. The power is transmitted to the cutter head by a pulley, and the structure is simple, the transmission is stable, and buffering and vibration absorption can be achieved.

Description

Technical Field

[0001] The invention belongs to the field of agricultural machinery, and in particular relates to a rubber tapping knife used for rubber tree tapping in the field. Background Art

[0002] Ever since humans discovered that they could collect natural rubber from rubber trees, the method of forming a rubber flow path on the rubber tree bark has always been to cut it manually with a hand-held rubber tapping knife. In recent years, electric rubber tapping knives have begun to appear, but they still require manual hand-held operation.

[0003] Chinese invention patent application CN104429813A discloses a rubber tapping machine, comprising a tree-binding frame and two annular planetary gear housings respectively mounted at the upper and lower ends of the tree-binding frame, a vector movable tool holder assembly is arranged between the two planetary gear housings; a gear shaft is arranged on the vector movable tool holder assembly, a motor and a rubber tapping tool holder with a gear rack are arranged in the vector movable tool holder assembly; a rubber tapping knife assembly is arranged in the rubber tapping knife holder, the top of the rubber tapping knife assembly is connected to a lead screw, and the lead screw can be rotated to make the rubber tapping knife assembly move up and down in the rubber tapping knife holder. The rubber tapping knife disclosed in the invention can only change the rubber tapping depth by replacing the cutter head, which is not only troublesome to replace, but also requires the preparation of cutter heads of different specifications and sizes, increasing the equipment cost.

[0004] Chinese utility model patent CN 204907383 U discloses a rubber tapping knife, in which the handle is controlled by a motor, and the handle is extended until the roller is pressed against the rubber bark, and then the knife head cuts into the rubber bark. A spring is arranged in the cavity in the handle, and the extension length of the handle can be automatically adjusted according to the thickness of the rubber tree trunk during the rubber tapping process, so that the roller is always pressed against the rubber bark. However, the rubber tapping knife has a complex structure, high processing cost, and cannot remove the rubber line well (the rubber line is formed by the solidification of the rubber juice left on the bark after the last rubber tapping, which will affect the next rubber tapping). Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a rubber tapping knife which can remove the rubber line while tapping the rubber.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0007] A rubber tapping knife, the improvement of which lies in that: the rubber tapping knife comprises a base, a driving motor is arranged inside the base, the driving motor can drive a driving pulley on the outer wall of the base to rotate through a gear component in the base, the root of a swing arm is hinged with a column protrusion on the outer wall of the base, and a torsion spring is sleeved on the column protrusion; a rotatable cutter disc is arranged at the head of the swing arm, a blade is installed on the cutter disc, a driven pulley is fixedly installed on one side of the cutter disc, and the driven pulley is connected to the above-mentioned driving pulley through a belt.

[0008] Further, the base is sleeved on the lead screw of the rubber tapping machine and can slide up and down along the lead screw as the lead screw rotates.

[0009] Further, a stop block is arranged on the swing arm.

[0010] Further, a profiling member that can rotate and swing is arranged at the head of the swing arm. A cutter head is installed on one side of the profiling member, and a driven pulley is installed on the other side of the profiling member.

[0011] Further, the cutter head is installed on the profiling member through anti-loosening screws.

[0012] Further, the number of blades is more than three, and each blade is evenly distributed on the outer edge of the cutter head.

[0013] Further, depth adjustment holes are opened on the blades, and bolts passing through the depth adjustment holes fix the blades on the cutter head.

[0014] The beneficial effects of the present invention are:

[0015] The rubber tapping knife disclosed by the present invention drives the cutter head to rotate rapidly through a motor, and while cutting rubber tree bark by rotary cutting, the remaining rubber threads can also be quickly cut off. The power is transmitted to the cutter head through a pulley, and the structure is simple, the transmission is stable, and the buffering and vibration absorption are good.

[0016] For the rubber trees growing in nature, the shape of the tree trunks is not a perfect circle. However, for the rubber tapping knife disclosed by the present utility model, through the action of a torsion spring, the blades on the cutter head can always be pressed tightly against the tree bark for cutting. Coupled with the profiling member that can roll along the tree bark, it ensures that the cutting depth of the blades on the surface of the tree bark is uniform, solving the problems that in the past, when encountering concave places, the blades could not cut in place; when encountering convex places, the blades cut too deeply, damaging the blades and hurting the rubber trees. In addition, the cutting depth can also be adjusted at any time by using the depth adjustment holes opened on the blades. Description of the Drawings

[0017] Figure 1 is a schematic structural diagram of the rubber tapping knife disclosed in Embodiment 1 of the present invention;

[0018] Figure 2 is a schematic installation position diagram of the rubber tapping knife A disclosed in Embodiment 1 of the present invention installed on a rubber tapping machine. Detailed Embodiments

[0019] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0020] Embodiment 1, as Figure 1As shown in the figure, this embodiment discloses a rubber tapping knife. The rubber tapping knife includes a base 4. A driving motor is arranged inside the base. The driving motor can drive the rotation of a driving pulley 7 on the outer wall of the base through a gear member inside the base. The root of the swing arm 6 is hinged to a stud on the outer wall of the base, and two torsion springs 5 are sleeved on the stud. One end of the torsion spring 5 is connected to a component on the base for controlling the retraction and extension, and the other end just abuts against the stop block 11 of the swing arm when applying force. A profiling member 1 that can rotate and swing is arranged at the head of the swing arm. A cutter head 2 is installed on one side of the profiling member. Blades 3 are installed on the cutter head. A driven pulley 8 is installed on the other side of the profiling member. The driven pulley is in transmission connection with the above-mentioned driving pulley through a belt 9.

[0021] As Figure 2 shown, the base is sleeved on the lead screw of the rubber tapping machine and can slide up and down along the lead screw as the lead screw rotates.

[0022] In this embodiment, the cutter head is installed on the profiling member through anti-loosening screws. The number of blades is four, and each blade is evenly distributed on the outer edge of the cutter head. Depth adjustment holes 10 are opened on the blades, and bolts passing through the depth adjustment holes fixedly install the blades on the cutter head.

[0023] After the rubber tapping machine equipped with the rubber tapping knife disclosed in this embodiment is sleeved on the rubber tree, the torsion spring makes the blades on the cutter head always abut against the tree bark, and the profiling member can roll along the tree bark, making the cutting depth on the surface of the tree bark uniform. In addition, the cutting depth can be adjusted at any time by using the depth adjustment holes opened on the blades.

Claims

1. A rubber tapping knife, characterized in that: The described rubber tapping knife includes a base. A driving motor is arranged inside the base. The driving motor can drive the rotation of a driving pulley on the outer wall of the base through a gear member inside the base. The root of the swing arm is hinged to a stud on the outer wall of the base, and a torsion spring is sleeved on the stud. A rotatable cutter head is arranged at the head of the swing arm, a blade is installed on the cutter head, and a driven pulley is fixedly installed on one side of the cutter head. The driven pulley is in transmission connection with the above-mentioned driving pulley through a belt. A profiling member that can rotate and swing is arranged at the head of the swing arm. A cutter head is installed on one side of the profiling member, and a driven pulley is installed on the other side of the profiling member. The base is sleeved on the lead screw of the rubber tapping machine and can slide up and down along the lead screw as the lead screw rotates. A stop block is arranged on the swing arm. The cutter head is installed on the profiling member through a locknut. The number of blades is more than three, and each blade is evenly distributed on the outer edge of the cutter head. A depth adjustment hole is opened on the blade, and the blade is fixedly installed on the cutter head through a bolt passing through the depth adjustment hole.

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