Injection drill bit for tree pesticide spraying gun

Abstract

The utility model relates to the technical field of garden equipment, in particular to an injection drill bit for a tree pesticide spraying gun, which comprises a drill bit and a connecting sleeve, the connecting sleeve is sleeved and fixed on the outer side of a drill handle of the drill bit, and a self-tapping thread part is formed at one end, close to the drill bit, of the connecting sleeve. A drill groove of the drill bit extends to the inner side of the connecting sleeve and is communicated with an inner cavity of the connecting sleeve, a rotary blocking part is arranged on the drill bit on the outer side of the connecting sleeve, and the rotary blocking part is fixedly connected with the outer wall of the drill bit on the outer side of the drill groove and the end face of the connecting sleeve. The liquid outlet of the drill bit is effectively prevented from being blocked, and high-efficiency operation of the pesticide spraying gun is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of gardening equipment, in particular to an injection drill bit for a tree spraying gun. Background Art

[0002] In order to ensure that garden plants are free from the threat of diseases and pests during their growth, it is usually necessary to drill holes and inject medicine into trees. A tree sprayer is the preferred equipment required. For example, CN211960198U discloses a drilling and injection integrated handheld device for electric tree trunk injection, including an electric drill, a rotary joint, a connecting sleeve, a tap and a drill bit. One end of the rotating shaft in the rotary joint is connected to the electric drill, and the other end is locked with the L-shaped slot at the rear end of the connecting sleeve through a pin. The drill bit is welded to the front end of the connecting sleeve, and the tap is inserted into the front end of the rotating shaft and is located in the connecting sleeve. The front end of the tap has a liquid outlet, and the outer side of the rotary joint has a liquid inlet connected to the injection equipment. The rotating shaft and the tap have a liquid channel for connecting the liquid inlet and the liquid outlet.

[0003] Although the above equipment realizes the integration of injection equipment and drilling equipment, it still requires multiple operations when in use. That is, after the drill bit is driven by the electric drill to drill a hole in the tree trunk, it is necessary to first withdraw the drill bit and unlock and remove the connecting sleeve at the rear end of the drill bit from the rotating shaft, and then use the tap to drive the tap into the hole in the tree trunk before the injection operation can be performed. The entire operation step is not simple enough and the operation efficiency needs to be improved. One way to improve the operation efficiency is to improve the drill bit. For example, CN211656939U discloses a method for a trunk injection machine. The drilling and injection mechanism has an inner hole inside the drill bit that goes straight from the tail to the head. The tail of the drill bit is connected to the rotating shaft of the rotary joint through an elastic water stop clamp, so that the inner hole of the drill bit is connected to the liquid channel inside the rotating shaft. After the drilling work is completed, the drill bit can be directly injected without pulling out the drill bit. However, when the above-mentioned drill bit is actually used for drilling, the continuously generated wood chips will block the liquid outlet of the drill bit head, thereby causing the pressure of the injection channel and the injection equipment to increase, which can easily cause damage and rupture of the pipeline inside the injection equipment, and the entire equipment cannot be used normally. Utility Model Content

[0004] In order to solve the above-mentioned deficiencies in the prior art, the utility model provides an injection drill bit for a tree pesticide gun, which effectively prevents the drill bit's liquid outlet from being blocked and ensures high-efficiency operation of the pesticide gun.

[0005] The technical solution of the utility model is: an injection drill bit for a tree spraying gun, comprising a drill bit and a connecting sleeve, the connecting sleeve being sleeved and fixed on the outside of the drill shank of the drill bit, a self-tapping threaded portion being formed on one end of the connecting sleeve close to the drill bit, the drill groove of the drill bit extending to the inside of the connecting sleeve and being connected to the inner cavity of the connecting sleeve, a rotary stop portion being provided on the drill bit located on the outside of the connecting sleeve, the rotary stop portion being fixedly connected to the outer wall of the drill bit outside the drill groove and the end face of the connecting sleeve respectively. The drill bit and the self-tapping threaded part at the front end of the connecting sleeve are drilled into the tree trunk together. Since the front end of the inner cavity of the connecting sleeve is connected to the drill groove of the drill bit, and the rear end of the inner cavity of the connecting sleeve is connected to the liquid channel inside the rotary joint, the drill groove near the end face of the connecting sleeve becomes the liquid outlet of the injection drill bit. Compared with the liquid outlet opened on the drill head in the prior art, the size of the liquid outlet is greatly increased, reducing the risk of complete blockage, and the rotary stop part located at this position blocks the wood chips entering the drill groove and performs rotary cutting, thereby ensuring the cleanliness of the liquid outlet, achieving the purpose of preventing liquid injection blockage, and ensuring the high-efficiency operation of the spraying gun.

[0006] The self-tapping thread portion is a tapered thread portion that is gradually tapered in a direction close to the drill bit. The tapered thread portion can effectively enhance the sealing of the trunk borehole by the connecting sleeve, thereby preventing the high-pressure liquid medicine entering the trunk from overflowing.

[0007] The outer side of the connecting sleeve has a frustum portion, which is gradually tapered in the direction close to the drill bit, and the small end of the frustum portion is integrally connected to the large end of the tapered thread portion. The frustum portion further improves the sealing effect of the connecting sleeve on the outside of the drill hole.

[0008] The length of the rotary stop portion is not less than the width of the drill groove.

[0009] The rotary stop is a welding point welded between the drill bit and the end face of the connecting sleeve outside the drill groove. Using the welding point as the rotary stop fixed between the drill bit and the end face of the connecting sleeve is convenient to process and has a good fixing effect between the drill bit and the connecting sleeve.

[0010] A fixing hole is provided on the outer wall of the connecting sleeve, a welding column is provided in the fixing hole, and two ends of the welding column are fixedly connected to the drill handle in the connecting sleeve and the inner wall of the fixing hole respectively.

[0011] A locating pin is provided on the connecting sleeve at a position away from the drill bit. The locating pin is fixed to the outer wall of the connecting sleeve and is adapted to engage with a slot provided at the front end of the rotating shaft. The locating pin engages with the slot at the front end of the rotating shaft to prevent relative rotation of the connecting sleeve and the rotating shaft when the connecting sleeve is locked.

[0012] A filter screen is fixed on the end surface of the connecting sleeve away from the drill bit.

[0013] The beneficial effects of the present invention are as follows: by sleeve-fitting a connecting sleeve on the outside of the drill bit, the rear end of the connecting sleeve is connected to the rotary joint, and the self-tapping threaded portion at the front end of the connecting sleeve is drilled into the tree trunk together with the drill bit. Since the front end of the inner cavity of the connecting sleeve is connected to the drill groove of the drill bit, and the rear end of the inner cavity of the connecting sleeve is connected to the liquid channel inside the rotary joint, the drill groove near the end face of the connecting sleeve becomes the liquid outlet of the injection drill bit. Compared with the liquid outlet opened on the drill head in the prior art, the size of the liquid outlet is greatly increased, reducing the risk of complete blockage, and the rotary stop portion located at this position blocks and rotary-cuts the wood chips entering the drill groove, thereby ensuring the cleanliness of the liquid outlet, achieving the purpose of preventing liquid injection from being blocked, and ensuring the high-efficiency operation of the spray gun. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of the utility model;

[0015] Figure 2 This is a structural diagram of the utility model from another angle

[0016] Figure 3 It is a cross-sectional view of the utility model;

[0017] Figure 4 It is a disassembly schematic diagram of the connection between the utility model and the rotating shaft.

[0018] Figure numerals: 1, drill bit; 101, drill groove; 2, connecting sleeve; 201, inner cavity; 202, tapered thread portion; 203, frustum portion; 3, rotary stop portion; 4, welding column; 5, positioning pin; 6, filter screen; 7, rotating shaft; 701, cutting groove; 8, locking nut. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions of the present invention are clearly and completely described below in conjunction with the accompanying drawings. Other embodiments obtained by those skilled in the art without making any creative work should fall within the scope of protection of the present invention.

[0020] like Figure 1-Figure 3 As shown, the utility model provides an injection drill bit 1 for a tree spraying gun. The installation method of the injection drill bit 1 on the tree spraying gun is the same as the prior art, namely the patent CN219288225U applied online by the company. The injection drill bit 1 is connected to the electric drill via a rotary joint. The injection drill bit 1 includes a drill bit 1 and a connecting sleeve 2. The connecting sleeve 2 is sleeved and fixed on the outer side of the drill shank of the drill bit 1. The end of the connecting sleeve 2 away from the drill bit 1 (i.e., the rear end of the connecting sleeve 2) forms a connection portion that cooperates with the rotating shaft 7 of the rotary joint. Figure 4As shown, in order to achieve rapid cooperation between the injection drill bit 1 and the front end of the rotating shaft 7, a positioning pin 5 is provided at a position of the connecting sleeve 2 away from the drill bit 1. The positioning pin 5 is fixed on the outer wall of the connecting sleeve 2 and cooperates with the groove 701 opened at the front end of the rotating shaft 7. This can prevent the connecting sleeve 2 from rotating relative to the rotating shaft 7 when the locking nut 8 is used for locking connection after the connecting sleeve 2 is inserted into the rotating shaft 7, thereby ensuring stable installation of the injection drill bit 1.

[0021] A self-tapping threaded portion is formed on one end of the connecting sleeve 2 near the drill bit 1. The drill groove 101 of the drill bit 1 extends to the inside of the connecting sleeve 2 and is connected to the inner cavity 201 of the connecting sleeve 2. The self-tapping threaded portion of the connecting sleeve 2 is drilled into the tree trunk together with the drill bit 1. Since the two ends of the inner cavity 201 of the connecting sleeve 2 are respectively connected to the drill groove 101 and the liquid channel inside the rotating shaft 7, the drill groove 101 near the end face of the connecting sleeve 2 becomes the liquid outlet of the injection drill bit 1. Compared with the liquid outlet opened on the head of the drill bit 1 in the prior art, the liquid outlet The size of the drill bit 1 is greatly increased, thereby reducing the risk of complete blockage; a rotary stop 3 is provided on the drill bit 1 located outside the connecting sleeve 2, and the rotary stop 3 is fixedly connected to the outer wall of the drill bit 1 outside the drill groove 101 and the end face of the connecting sleeve 2 respectively. The rotary stop 3 blocks the wood chips entering the drill groove 101 near the end face of the connecting sleeve 2, and the rotary stop 3 performs secondary rotary cutting and crushing on the wood chips at this location during the rotation of the drill bit 1, thereby ensuring the cleanliness of the liquid outlet, achieving the purpose of preventing liquid injection from being blocked, and ensuring the normal use of the spray gun.

[0022] In this embodiment, the drill flute 101 of the drill bit 1 is a double-helix drill flute 101, and there are two chocks 3 symmetrically distributed on the drill bit 1 outside the drill flute 101. Further preferably, to ensure the blocking effect of the chocks 3, the length of the chocks 3 is no less than the width of the drill flute 101. Furthermore, to reduce wear of the chocks 3 during rotation of the drill bit 1, the maximum distance between the outer sides of the two chocks 3 is no greater than the external thread size of the self-tapping thread portion.

[0023] In this embodiment, in order to facilitate the processing of the rotary stop part 3, the rotary stop part 3 is a welding point between the end faces of the drill bit 1 and the connecting sleeve 2 welded on the outside of the drill groove 101. At the same time, the welding point can also have a good fixing effect on the drill bit 1 and the connecting sleeve 2.

[0024] Further preferably, the self-tapping thread portion is a tapered thread portion 202, which is gradually tapered in the direction approaching the drill bit 1. The tapered thread portion 202 more effectively seals the drill hole in the tree trunk, preventing the high-pressure liquid from entering the tree trunk from overflowing. To further improve the sealing effect, the outer side of the connecting sleeve 2 has a frustum portion 203, which is gradually tapered in the direction approaching the drill bit 1, and the small end of the frustum portion 203 is integrally connected to the large end of the tapered thread portion 202.

[0025] like Figure 3 As shown, a fixing hole is opened on the outer wall of the connecting sleeve 2, and a welding column 4 is provided in the fixing hole. The two ends of the welding column 4 are respectively fixedly connected to the drill shank in the connecting sleeve 2 and the inner wall of the fixing hole, and the drill bit 1 and the connecting sleeve 2 are further fixed by the welding column 4.

[0026] like Figure 2 As shown, a filter screen 6 is fixed to the end surface of the connecting sleeve 2 away from the drill bit 1 to filter the liquid medicine entering the inner cavity 201 of the connecting sleeve 2 to ensure smooth injection. The filter screen 6 can be made of stainless steel and fixed to the end surface of the connecting sleeve 2 by spot welding. Preferably, the end surface of the connecting sleeve 6 can be provided with a mounting groove that matches the filter screen 6.

[0027] When implementing this technical solution, if Figure 4 As shown, the rear end of the connecting sleeve 2 of the injection drill bit 1 is inserted into the rotating shaft 7, and the positioning pin 5 cooperates with the cut groove 701 at the front end of the rotating shaft 7. As the locking nut 8 is tightened, the front end of the rotating shaft 7 is pressed against the connecting sleeve 2, thereby realizing the cooperative connection between the injection drill bit 1 and the rotating shaft 7. The electric drill of the tree spray gun is operated to drill the drill bit 1 and the self-tapping threaded portion of the connecting sleeve 2 into the tree trunk together. During the drilling process, the welding point (i.e., the rotary stop portion 3) located at the end face of the connecting sleeve 2 rotates with the drill bit 1, blocking the wood chips entering the drill groove 101 and crushing them for a second time, thereby ensuring that the drill groove 101 as the liquid outlet is clean, and the liquid medicine smoothly enters the tree trunk, so that the spray gun can operate normally and efficiently.

Claims

1. The injection drill bit for tree spraying gun is characterized by: It includes a drill bit and a connecting sleeve, the connecting sleeve is sleeved and fixed on the outside of the drill shank of the drill bit, a self-tapping threaded portion is formed on one end of the connecting sleeve close to the drill bit, the drill groove of the drill bit extends to the inside of the connecting sleeve and is connected to the inner cavity of the connecting sleeve, and a rotary stop portion is provided on the drill bit located on the outside of the connecting sleeve, and the rotary stop portion is fixedly connected to the outer wall of the drill bit outside the drill groove and the end face of the connecting sleeve respectively.

2. The injection drill bit for a tree spraying gun according to claim 1, characterized in that: The self-tapping thread portion is a tapered thread portion, and the tapered thread portion is gradually tapered in a direction close to the drill bit.

3. The injection drill bit for a tree spraying gun according to claim 2, characterized in that: The outer side of the connecting sleeve is provided with a frustum portion, the frustum portion is gradually tapered in a direction close to the drill bit, and the small-size end of the frustum portion is integrally connected with the large-size end of the tapered thread portion.

4. The injection drill bit for a tree spraying gun according to claim 1, characterized in that: The length of the rotary stop portion is not less than the width of the drill groove.

5. The injection drill bit for a tree spraying gun according to any one of claims 1 to 4, characterized in that: The rotary stop portion is a welding point between the drill bit and the end surface of the connecting sleeve welded on the outside of the drill groove.

6. The injection drill bit for a tree spraying gun according to claim 5, characterized in that: A fixing hole is provided on the outer wall of the connecting sleeve, a welding column is provided in the fixing hole, and two ends of the welding column are fixedly connected to the drill handle in the connecting sleeve and the inner wall of the fixing hole respectively.

7. The injection drill bit for a tree spraying gun according to any one of claims 1 to 4, characterized in that: A positioning pin is provided at a position of the connecting sleeve away from the drill bit. The positioning pin is fixed on the outer wall of the connecting sleeve and is used to cooperate with the groove provided at the front end of the rotating shaft.

8. The injection drill bit for a tree spraying gun according to any one of claims 1 to 4, characterized in that: A filter screen is fixed on the end surface of the connecting sleeve away from the drill bit.

Images