Drill bit connecting mechanism for high-pressure minimally invasive forest injection machine

Abstract

The utility model relates to the field of garden protection equipment, in particular to a drill bit connecting mechanism for a high-pressure minimally invasive forest injection machine, a rotating mandrel is coaxially connected with a drill bit through a locking nut, the drill bit comprises a cutting part and a supporting part, and the drill bit connecting mechanism is characterized in that a coaxial annular circular truncated cone is arranged on the supporting part; a locking structure is arranged between the rotating mandrel and the drill bit connecting end, threads matched with the locking nut are arranged on the outer surface of the rotating mandrel and the drill bit connecting end, a flow guide channel matched with the drill bit supporting part is arranged in the rotating mandrel and the drill bit connecting end, and the diameter of the annular circular truncated cone is larger than that of the flow guide channel of the rotating mandrel. The drill bit supporting part is inserted into the rotating mandrel flow guide channel, and the drill bit and the rotating mandrel are locked through a locking mechanism and then fixed through a locking nut. Stability and safety of equipment can be improved, it is ensured that the drill bit can be firmly connected to the rotating mandrel during working, it is ensured that the equipment can reliably work under the condition of high-speed rotation or high pressure, and accident risks are reduced.

Description

Technical Field

[0001] The utility model relates to the field of garden protection equipment, in particular to a drill bit connection mechanism for a high-pressure minimally invasive forest injection machine. Background Art

[0002] The growth of garden plants is often disturbed by various diseases and pests, and chemical control is an important means to meet this challenge. Although the traditional method of pesticide injection is effective in dealing with most diseases and pests, it seems to be powerless against some stem-boring and piercing-sucking pests. In order to make up for this shortcoming, garden workers have adopted a new method of trunk drilling and injection. In this way, systemic pesticides are injected into the wood of the tree, and then transmitted to the trunk, stems and leaves through the ducts of the wood, achieving effective prevention and control of pests hidden deep in the tree. Compared with the traditional injection method, trunk drilling and injection has many advantages such as saving liquid, significant prevention and control effect, and environmental friendliness. Therefore, trunk drilling and injection has become an important prevention and control method in garden maintenance, providing a more reliable guarantee for protecting the health and growth of garden plants.

[0003] Chinese patent number CN202320230862.8 provides a high-pressure tree minimally invasive pesticide gun, the end of the rotating mandrel connected to the drill bit is a conical portion with a certain taper, a groove is provided on the conical portion, a thread is provided behind the groove, and the tail section of the drill bit is inserted into the liquid guide channel of the rotating mandrel. The chuck structure also includes a locking nut, and the locking nut is provided with an inner conical surface for pressing the conical portion of the rotating mandrel. As the locking nut is tightened, the inner conical surface presses the conical portion of the rotating mandrel onto the tail section of the drill bit, thereby realizing the detachable connection between the drill bit and the rotating mandrel.

[0004] In the above technical solution, once the drill bit encounters resistance or poor drilling during the process of drilling a tree, the tightening of the locking nut will cause the tapered portion of the rotating mandrel to be pressed against the tail section of the drill bit, and the pressure applied by the locking nut will be unevenly distributed on the tapered portion of the rotating mandrel, causing the pressure to be concentrated in certain areas, while other areas may be subject to less pressure, thereby causing instability in the connection; the tightening of the locking nut will cause some slight deformation or deformation of the material between the tapered portion of the rotating mandrel and the tail section of the drill bit. Once the hardness or strength of the material is insufficient, this deformation may cause increased friction at the connection, thereby making the drill bit more likely to slip when drilling a tree. Summary of the invention

[0005] In order to solve the deficiencies in the prior art, the present invention provides a drill bit connection mechanism for a high-pressure minimally invasive forestry injection machine.

[0006] In order to achieve the above functions, the utility model will adopt the following technical solutions:

[0007] A drill bit connection mechanism for a high-pressure minimally invasive forest injection machine, comprising a drill bit, a locking nut and a rotating mandrel, the rotating mandrel being coaxially connected to the drill bit through a locking nut, the drill bit comprising a cutting portion and a supporting portion, characterized in that a coaxial annular truncated cone is provided on the supporting portion, a locking structure is provided between the rotating mandrel and the drill bit connection end, a thread matching the locking nut is provided on the outer surface of the rotating mandrel and the drill bit connection end, a guide channel matching the drill bit support portion is provided inside, the diameter of the annular truncated cone is larger than the diameter of the rotating mandrel guide channel, the drill bit support portion is inserted into the rotating mandrel guide channel, the drill bit and the rotating mandrel are locked by a locking mechanism and then fixed by a locking nut. The utility model can improve the stability and safety of the equipment, ensure that the drill bit can be firmly connected to the rotating mandrel during operation, avoid the occurrence of unexpected situations, ensure that the equipment can work reliably under high-speed rotation or high-pressure conditions, and reduce the risk of accidents.

[0008] The flow guide channel of the rotating mandrel of the utility model is divided into a coaxial left flow guide channel and a right flow guide channel, wherein the diameter of the left flow guide channel is smaller than that of the right flow guide channel.

[0009] The utility model discloses a sealing ring in the right flow guide channel of the rotating mandrel, which provides a sealing function between the right flow guide channel of the rotating mandrel and the supporting part to prevent the medicine from flowing out.

[0010] The locking structure of the utility model comprises a groove and a protrusion which are embedded with each other, the groove is located on the annular truncated table, and the protrusion is located at the connection end of the rotating mandrel and the drill bit.

[0011] The cutting part of the drill bit of the utility model is provided with a twist drill section and a tapered thread section from front to back, and the twist drill section is responsible for the actual drilling process. Tapered threads are widely used to seal liquid medicines, especially under high pressure conditions, because they have advantages such as self-sealing characteristics, increased contact area, high pressure resistance, anti-loosening and self-locking functions. This design can form an effective seal during the tightening process, disperse pressure and prevent liquid leakage or spraying, while simplifying the installation operation and improving the reliability and stability of the system.

[0012] The utility model has a liquid guiding channel in the tapered thread section and the supporting part, a liquid outlet is provided at the connection between the twist drill section and the tapered thread section, and a liquid inlet is provided at the rear end of the supporting part.

[0013] The utility model provides a convex block on the twist drill section close to the liquid outlet to prevent wood chips from accumulating and blocking the liquid outlet, thereby ensuring the smooth progress of the liquid medicine injection process.

[0014] The utility model has no less than 2 protrusions, which are distributed in a ring shape on the twist drill along the axis of the drill bit to form a protrusion ring. The protrusions are evenly distributed, which can more effectively prevent blockage.

[0015] The utility model ensures that the drill bit can be firmly connected to the rotating mandrel during operation through a locking structure, and is fixed by a locking nut to avoid accidents, thereby improving the stability and safety of the equipment. The design of the drill bit cutting part includes a twist drill section and a tapered thread section, which can efficiently cut and form a thread structure, simplify the operation process, and improve work efficiency; a liquid guide channel is provided in the tapered thread section and the support part, and a liquid outlet and a liquid inlet are provided. The bumps on the twist drill section and the bump ring are designed to make the bumps evenly distributed along the axis of the drill bit, more effectively preventing blockage and improving the reliability and durability of the equipment. In summary, the utility model has the advantages of stability, safety, and simple operation, and can effectively prevent the drill bit from slipping and blocking. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model.

[0017] Figure 2 for Figure 1 Right view of .

[0018] Figure 3 for Figure 1 Stereoscopic diagram.

[0019] Figure 4 for Figure 1 Exploded diagram.

[0020] Figure 5 Schematic diagram of the drill bit structure. DETAILED DESCRIPTION

[0021] The utility model will be further described below in conjunction with the accompanying drawings:

[0022] A drill bit connection mechanism for a high-pressure minimally invasive forest injection machine, comprising a drill bit 1, a locking nut 2 and a rotating mandrel 3, wherein the rotating mandrel 3 is coaxially connected to the drill bit 1 through the locking nut 2, and the drill bit comprises a cutting portion and a supporting portion 4, characterized in that a coaxial annular truncated cone 5 is provided on the supporting portion, a locking structure is provided between the rotating mandrel and the drill bit connection end, a thread 11 matching the locking nut is provided on the outer surface of the rotating mandrel and the drill bit connection end, a flow guide channel matching the drill bit support portion is provided inside, the diameter of the annular truncated cone 5 is larger than the diameter of the flow guide channel of the rotating mandrel, the drill bit support portion is inserted into the flow guide channel of the rotating mandrel, and the drill bit and the rotating mandrel are locked by the locking mechanism and fixed by the locking nut 2. The utility model can improve the stability and safety of the equipment, ensure that the drill bit can be firmly connected to the rotating mandrel during operation, avoid the occurrence of unexpected situations, ensure that the equipment can work reliably under high-speed rotation or high-pressure conditions, and reduce the risk of accidents.

[0023] The locking structure of the utility model is a groove 12 and a protrusion 13 which fit together. The groove is located on the annular truncated cone 5, and the protrusion is located at the connection end between the rotating mandrel and the drill bit.

[0024] The cutting part of the drill bit of the utility model is provided with a twist drill section 6 and a tapered thread section 7 from front to back in sequence, and the twist drill section is responsible for the actual drilling process. The cutting part of the drill bit of the utility model is provided with a twist drill section and a tapered thread section from front to back in sequence, and the twist drill section is responsible for the actual drilling process. Tapered threads are widely used to seal liquid medicines, especially under high pressure conditions, because they have advantages such as self-sealing properties, increased contact area, high pressure resistance, anti-loosening and self-locking functions. This design can form an effective seal during the tightening process, disperse pressure and prevent liquid leakage or spraying, while simplifying installation operations and improving the reliability and stability of the system.

[0025] In the utility model, a liquid guiding channel is arranged inside the tapered thread section and the supporting part, a liquid outlet 8 is arranged at the connection between the twist drill section and the tapered thread section, and a liquid inlet 9 is arranged at the rear end of the supporting part.

[0026] The utility model provides a convex block 10 on the twist drill section near the liquid outlet to prevent wood chips from accumulating and blocking the liquid outlet, thereby ensuring the smooth progress of the liquid medicine injection process.

[0027] The utility model has no less than 2 protrusions, which are distributed in a ring shape on the twist drill along the axis of the drill bit to form a protrusion ring. The protrusions are evenly distributed, which can more effectively prevent blockage.

[0028] The utility model ensures that the drill bit can be firmly connected to the rotating mandrel during operation through a locking structure, and is fixed by a locking nut to avoid accidents, thereby improving the stability and safety of the equipment. The design of the drill bit cutting part includes a twist drill section and a tapered thread section, which can efficiently cut and form a threaded structure, simplify the operation process, and improve work efficiency; a liquid guide channel is provided in the tapered thread section and the support part, and a liquid outlet and a liquid inlet are provided. The bumps on the twist drill section and the bump ring are designed to make the bumps evenly distributed along the axis of the drill bit, more effectively preventing blockage, and improving the reliability and durability of the equipment. In summary, the utility model has the advantages of stability, safety, and simple operation, and can effectively prevent the drill bit from slipping and blocking.

Claims

1. A drill bit connection mechanism for a high-pressure minimally invasive forest injection machine, comprising a drill bit, a locking nut and a rotating mandrel, wherein the rotating mandrel is coaxially connected to the drill bit through the locking nut, and the drill bit comprises a cutting portion and a supporting portion, characterized in that: A coaxial annular cone is provided on the support part, and a locking structure is provided between the rotating mandrel and the drill bit connecting end. A thread matching a locking nut is provided on the outer surface of the rotating mandrel and the drill bit connecting end, and a guide channel matching the drill bit support part is provided inside. The diameter of the annular cone is larger than the diameter of the guide channel of the rotating mandrel. The drill bit support part is inserted into the guide channel of the rotating mandrel. After the drill bit and the rotating mandrel are locked by the locking mechanism, they are fixed by the locking nut.

2. A drill bit connection mechanism for a high-pressure minimally invasive forest injection machine according to claim 1, characterized in that The guide channel of the rotating core shaft is divided into a coaxial left guide channel and a right guide channel, wherein the left guide channel has a smaller diameter than the right guide channel, and the right guide channel cooperates with the support portion on the left side of the annular cone.

3. The drill bit connection mechanism for a high-pressure minimally invasive forest injection machine according to claim 1 is characterized in that A sealing ring is arranged in the right flow guide channel of the rotating core shaft, and the sealing ring provides a sealing function between the right flow guide channel of the rotating core shaft and the supporting part.

4. The drill bit connection mechanism for a high-pressure minimally invasive forest injection machine according to claim 1 is characterized in that The locking structure is a groove and a protrusion that fit into each other, wherein the groove is located on the annular truncated table, and the protrusion is located at the connecting end of the rotating mandrel and the drill bit.

5. The drill bit connection mechanism for a high-pressure minimally invasive forest injection machine according to claim 1 is characterized in that The cutting part of the drill bit is provided with a twist drill section and a tapered thread section in sequence from front to back.

6. A drill bit connection mechanism for a high-pressure minimally invasive forest injection machine according to claim 5, characterized in that A liquid conducting channel is arranged in the tapered thread section and the support part, a liquid outlet is arranged at the connection between the twist drill section and the tapered thread section, and a liquid inlet is arranged at the rear end of the support part.

7. The drill bit connection mechanism for a high-pressure minimally invasive forest injection machine according to claim 1 is characterized in that A convex block is provided on the twist drill section near the liquid outlet to prevent wood chips from accumulating and blocking the liquid outlet, thereby ensuring the smooth progress of the liquid medicine injection process.

8. The drill bit connection mechanism for a high-pressure minimally invasive forest injection machine according to claim 7, characterized in that The number of the bumps is not less than 2, and the bumps are distributed in a ring shape on the twist drill along the axis of the drill bit to form a bump ring, and the bumps are evenly distributed.

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