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CN-224205786-U - Drill bit for trunk injection machine

CN224205786UCN 224205786 UCN224205786 UCN 224205786UCN-224205786-U

Abstract

The application relates to the technical field of trunk injection machines, in particular to a drill bit for a trunk injection machine, which is provided with a drill bit assembly, wherein the drill bit assembly comprises a drill bit, a self-tapping thread section and a drill bit mounting rod, a liquid outlet is formed in the joint of the drill bit and the self-tapping thread section, arc-shaped bulges are symmetrically arranged on the two sides of the liquid outlet along the rotation direction of the drill bit, and the arc-shaped bulges are used for guiding wood chips generated by drilling to the two sides of the liquid outlet. Through setting up the arc arch, with saw-dust direction both sides, guaranteed the unblocked of liquid outlet, make the liquid medicine can be continuously, pour into the trunk steadily, the emergence of the jam condition has significantly reduced, makes the medicine injection operation go on in succession, has reduced the maintenance cost of equipment, has improved whole work efficiency. Through setting up locking protruding and locking draw-in groove, restricted the circumferential direction of drill bit subassembly relative rotation dabber, drill bit subassembly is difficult for taking place to rotate, has ensured the stability and the accuracy of drilling.

Inventors

  • WANG JIKUI
  • ZHAO MINGHAI
  • LI MIN
  • ZHANG CANFENG

Assignees

  • 威海鑫博农林科技有限公司

Dates

Publication Date
20260508
Application Date
20250429

Claims (7)

  1. 1. The utility model provides a drill bit for trunk injection machine, is provided with drill bit subassembly (1), drill bit subassembly (1) include drill bit (11), self tapping screw section (12) and drill bit installation pole (13), be equipped with liquid outlet channel (14) in drill bit subassembly (1), drill bit (11) with self tapping screw section (12) junction is provided with liquid outlet (2), its characterized in that, liquid outlet (2) are equipped with arc arch (21) along the rotation direction bilateral symmetry of drill bit (11) for lead the saw-dust that drilling produced to the both sides of liquid outlet (2).
  2. 2. Drill bit for trunk injection machine according to claim 1, characterized in that the drill bit assembly (1) is detachably connected with the rotary mandrel (3) through a lock nut, a drill bit mounting hole (31) is arranged in the rotary mandrel (3), a locking protrusion (15) is arranged on the drill bit mounting rod (13), and a locking clamping groove (32) matched with the locking protrusion (15) is arranged on the rotary mandrel (3).
  3. 3. Drill bit for trunk injection machine according to claim 2, characterized in that the connection end face of the drill bit mounting rod (13) and the rotary mandrel (3) is provided with an annular filter screen, the mesh diameter of which is smaller than the diameter of the liquid outlet (2).
  4. 4. Drill bit for a trunk injector according to claim 2, characterized in that the lock nut is connected with the rotary spindle (3) by means of a threaded engagement, and that the lock nut, when screwed, compresses the bit mounting rod (13) so that the bit assembly (1) is tightly locked in the rotary spindle (3).
  5. 5. Drill bit for trunk injection machine according to claim 2, characterized in that the contact surface of the bit mounting rod (13) and the rotary mandrel (3) is provided with a sealing ring for preventing leakage of the liquid medicine.
  6. 6. Drill bit for trunk injection machines according to claim 1, characterized in that the number of outlets (2) is two, symmetrically arranged with the axial centre line of the drill bit (11).
  7. 7. Drill bit for a trunk injector according to claim 2, characterized in that the number of locking projections (15) and locking slots (32) is two.

Description

Drill bit for trunk injection machine Technical Field The utility model relates to the technical field of trunk injection machines, in particular to a drill bit for a trunk injection machine. Background The trunk injection machine is used as important equipment for preventing and controlling tree diseases and insect pests in the field of forestry protection, occupies a key position in modern forestry development, and adopts the working principle that the medicine is directly injected into the trunk, and the medicine liquid can be uniformly conveyed to all parts of the tree by utilizing the conveying tissue of the tree, so that the purpose of preventing and controlling the tree diseases and insect pests is achieved. Compared with the traditional spray control mode, the trunk injector has a plurality of remarkable advantages, such as more remarkable control effect, capability of precisely acting on harmful organisms, extremely small pollution to the environment, prevention of drift and leakage of medicines, effective protection of safety of drug applicators and surrounding organisms, great reduction of damage to natural enemies, and contribution to maintenance of ecological balance, and is widely applied to the fields of forestry production, urban garden maintenance and the like. Although trunk injectors play an important role in pest control, the existing trunk injector drill bit still has some problems, such as patent number 202322548647.5, which is an utility model patent of an electric trunk injector. In the aspect of liquid outlet design, the liquid outlet is arranged at the joint of the drill bit and the self-tapping screw, when the trunk is drilled, wood dust is extruded into the liquid outlet, normal outflow of liquid medicine is hindered, operators often need to frequently stop operation, the drill bit is disassembled for cleaning, the labor intensity is certainly increased, the working efficiency is reduced, if the cleaning is not timely, the pressure in an injection system can be rapidly increased under the condition of continuous pressurization, the liquid medicine supercharging device exceeds the pressure in the bearing range of the injection system, the parts are damaged and the liquid leakage phenomenon is caused, in addition, on the connection mode of the drill bit and the rotary mandrel, the drill bit is generally connected with the screw or in a single fixing mode, when the trunk injector works, due to the external force effects such as vibration and torque, the drill bit is easy to loose and rotate, the accuracy of drilling is affected, and the drill bit can fall off from the rotary mandrel, and the safety of the operators is threatened. Disclosure of Invention In order to solve the problems, the application provides a drill bit for a trunk injector, which is provided with a drill bit assembly, wherein the drill bit assembly comprises a drill bit, a self-tapping thread section and a drill bit mounting rod, a liquid outlet is formed in the drill bit assembly, a liquid outlet is formed in the joint of the drill bit and the self-tapping thread section, arc-shaped protrusions are symmetrically arranged on two sides of the liquid outlet along the rotation direction of the drill bit, and the arc-shaped protrusions are used for guiding wood chips generated by drilling to two sides of the liquid outlet. In one embodiment, the drill bit assembly is detachably connected with the rotary mandrel through a lock nut, a drill bit mounting hole is formed in the rotary mandrel, a locking protrusion is arranged on the drill bit mounting rod, and a locking clamping groove matched with the locking protrusion is formed in the rotary mandrel. In one embodiment, an annular filter screen is arranged at the connecting end surface of the drill bit mounting rod and the rotary mandrel, and the diameter of a mesh of the annular filter screen is smaller than that of the liquid outlet. In one embodiment, the lock nut is in threaded engagement with the rotating mandrel, and when the lock nut is screwed, the bit mounting rod is pressed tightly, so that the bit assembly is tightly locked on the rotating mandrel. In one embodiment, a sealing ring is arranged on the contact surface of the drill bit mounting rod and the rotary mandrel, and is used for preventing the liquid medicine from leaking. In one embodiment, the number of the liquid outlets is two, and the liquid outlets are symmetrically arranged along the axial center line of the drill bit. In one embodiment, the number of the locking protrusions and the number of the locking slots are two. The utility model has the beneficial effects that: The application relates to a drill bit for a trunk injection machine, which is provided with a drill bit assembly, wherein the drill bit assembly comprises a drill bit, a self-tapping thread section and a drill bit mounting rod, a liquid outlet is formed at the joint of the drill bit and the self-tapping thread section, arc-shaped b