A drill bit structure with replaceable tips and blades

Abstract

The utility model discloses a drill bit structure of replaceable drill tip and blade, including work pole and set up the blade on work pole, work pole lower extreme part is equipped with the tool rest, and the blade is detachably equipped on the tool rest, and the drill tip is detachably equipped on the bottom of tool rest, in the process of drilling, when the blade and drill tip appear wear or damage, and the blade or drill tip is replaced locally through above-mentioned dismounting structure. The drill bit structure modularization design of this application has realized the quick dismounting and local replacement of the easily damaged parts such as drill tip, blade, has solved the problem that the traditional integral type drill bit needs overall scrapping, cost is high when local wear or damage, and can improve work efficiency.

Description

Technical Field

[0001] This utility model relates to drill bits, and more particularly to a drill bit structure with replaceable drill tips and cutting tools. Background Technology

[0002] The drill bit is the core cutting component at the front end of engineering drilling equipment. It comes into direct contact with rock, soil and other strata, and is responsible for breaking the rock and soil to form a borehole. The drill tip at the bottom determines the start and guidance of the borehole, while the cutting blade on the upper side is responsible for cutting.

[0003] During use, the presence of various underground materials, such as rocks, can cause wear and damage to the cutting blades and drill tips, thus affecting drilling efficiency. For example, the patented deep pit drill bit with application number 201711189429.X has an integral structure, which requires the entire bit to be replaced if local wear or damage occurs, significantly increasing costs. Utility Model Content

[0004] This invention addresses the problem that existing drill bits, being of integral structure, cannot be replaced individually when partial damage occurs. The technical problem this invention aims to solve is to provide a drill bit structure with replaceable drill tips and cutting tools.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: A drill bit structure with replaceable drill tip and cutting tool includes a working rod and blades disposed on the working rod. A tool holder is provided at the lower end of the working rod, and a cutting tool is detachably disposed on the tool holder. A drill tip is detachably disposed at the bottom of the tool holder. During drilling, when the cutting tool and drill tip are worn or damaged, the cutting tool or drill tip can be partially replaced through the above-mentioned disassembly structure.

[0006] Preferably, the tool holder is provided with several mounting plates, and the blade is fixed to the mounting plates by countersunk screws.

[0007] Preferably, both the mounting plate and the blade are at an angle of 10-30 degrees to the horizontal plane.

[0008] Preferably, the mounting plate is provided with two plates, each of which is provided with a flat blade or a serrated blade.

[0009] Preferably, the bottom of the tool holder is provided with a shaped hole, and the top of the drill tip is provided with an insertion head that matches the shape of the shaped hole. After the insertion head is inserted into the shaped hole, it is fixed by fasteners.

[0010] Preferably, the blade includes a first helical blade and a second helical blade. The first helical blade extends helically from the upper side of the working rod to the top of one of the blades, and the second helical blade is offset from the first helical blade in the circumferential direction and extends from the lower side of the working rod to the top of the other blade.

[0011] Preferably, the top of the working rod is provided with a connector, the top of the connector is provided with a socket and a fastening hole extending horizontally from the side wall of the socket.

[0012] Preferably, the socket is a round hole or an irregularly shaped hole, and the side wall of the socket is provided with a spline groove.

[0013] Preferably, the blade is an alloy blade.

[0014] As a preferred option, the drill tip is made of cast steel.

[0015] Compared with the prior art, the present invention has the following advantages: By modularizing the drill bit structure, the present application realizes the quick disassembly and partial replacement of vulnerable parts such as drill tips and cutting blades, effectively solving the problem that traditional integral drill bits need to be scrapped as a whole when there is partial wear or damage, which is costly. Attached Figure Description

[0016] The present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be regarded as a limitation on the scope of the present invention. In addition, unless otherwise specified, the drawings are not necessarily drawn to scale.

[0017] Figure 1 This is the front view of the drill bit; Figure 2 An exploded view of the drill bit (two types of connectors are shown at the top); Figure 3 A 3D view of one type of connector; Figure 4 A 3D diagram of another type of connector; Figure 5 This is an exploded view of the drill bit (the drill tip explodes). Figure 6 for Figure 5 Enlarged view of point A in the middle; In the diagram: 10, working rod; 20, blade; 201, first helical blade; 202, second helical blade; 301, tool holder; 302, mounting plate; 303, cutting tool; 304, countersunk screw; 40, drill tip; 401, insertion head; 50, connector. Detailed Implementation

[0018] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely descriptive and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0019] It should be noted that similar labels in the following figures indicate similar items; therefore, once an item is defined in one figure, it may not be further defined and explained in subsequent figures. Example

[0020] This embodiment mainly describes the title of a drill bit structure with replaceable drill tips and cutting tools, as follows: like Figure 1-6 As shown, a drill bit structure with replaceable drill tip and cutting tools includes a working rod 10 and blades 20 disposed on the working rod 10. A tool holder 301 is provided at the lower end of the working rod 10, and a cutting tool 303 is detachably mounted on the tool holder 301. A drill tip 40 is detachably mounted at the bottom of the tool holder 301. During drilling, when the cutting tool 303 and the drill tip 40 are worn or damaged, the cutting tool 303 or the drill tip 40 can be partially replaced through the above-mentioned disassembly structure. Because the drill tip 40 works for a long time during machine operation, it is worn or damaged, resulting in severe wear of the drill bit and rendering it unusable. This solution, through modular design of the drill bit structure, realizes the rapid disassembly and partial replacement of vulnerable parts such as the drill tip 40 and the cutting tool 303, effectively solving the problem of traditional integral drill bits requiring complete scrapping and incurring high costs when partially worn or damaged, and also improving work efficiency.

[0021] Tool holder and blade section : like Figure 6 As shown, the tool holder 301 is provided with several mounting plates 302, and the cutting tool 303 is fixed to the mounting plate 302 by countersunk screws 304. Both the tool holder 301 and the cutting tool 303 have screw holes. After the countersunk screws 304 are screwed in, they are hidden inside the screw holes. Compared with the structure of using bolts and nuts for clamping and fixing, this avoids direct friction between the screws and the soil layer, effectively preventing the nut from loosening due to friction, and effectively avoiding the increased resistance caused by friction and the series of butterfly effects caused by increased resistance, such as reduced cutting efficiency.

[0022] like Figure 6 As shown, both the mounting plate 302 and the cutting tool 303 form an angle of 10-30 degrees with the horizontal plane, preferably 15 degrees. Additionally, the mounting plate 302 has an angle of less than 90 degrees with the horizontal plane in the width direction. The cutting tool 303 on the mounting plate 302 fits against the mounting plate 302 to form a double-angle structure, which reduces resistance with the soil layer during cutting and facilitates the drilling of the entire drill bit.

[0023] Preferably, the mounting plate 302 is provided with two plates, each equipped with either a flat blade or a serrated blade. This solution includes three combinations: both blades 303 are flat blades, both blades 303 are serrated blades, and both blades 303 are a combination of a flat blade and a serrated blade. When the flat blade and serrated blade are combined, they work together, and the flat blade can cut the edges produced by the serrated blade.

[0024] Preferably, the bottom of the tool holder 301 has a shaped hole, and the top of the drill tip 40 has an insertion head 401 that matches the shape of the shaped hole. After the insertion head 401 is inserted into the shaped hole, it is fixed by a fastener. The cross-section of the shaped hole is in the shape of an elliptical prism, a regular prism, etc. The function of the shaped hole is to prevent the two connected parts from rotating relative to each other, reduce the stress on the fastener, and avoid fastener breakage. The fastener is generally a screw.

[0025] blade section : like Figure 1-2 As shown, the blade 20 includes a first helical blade 201 and a second helical blade 202. The first helical blade 201 extends helically from the upper side of the working rod 10 to the top of one of the blades 303. The second helical blade 202 is offset from the first helical blade 201 in the circumferential direction and extends from the lower side of the working rod 10 to the top of the other blade 303. The extension of the first helical blade 201 and the second helical blade 202 to the two blades 303 can reduce the chip pressure of the two blades 303.

[0026] Installation structure part : like Figure 1-4 As shown, preferably, the working rod 10 has a connector 50 at its top, and the connector 50 has a socket at its top with a fastening hole extending horizontally from the side wall of the socket. During installation, it is inserted into other connectors, and then fixed by fasteners inserted into the fastening hole.

[0027] Preferably, the socket is a round hole or an irregularly shaped hole, and the side wall of the socket is provided with a spline groove. The irregularly shaped hole and the mating structure of the spline groove and spline prevent mutual rotation during use, reduce the stress on the fastener, and avoid fastener breakage.

[0028] Blade and drill tip : As a preferred choice, the 303 insert is an alloy insert. Alloy inserts 303 have strong wear resistance and extremely high hardness, effectively improving their service life; in addition, they also have strong impact toughness, making them suitable for heterogeneous layers.

[0029] Preferably, the drill tip 40 is a cast steel drill tip. The cast steel drill tip 40 performs particularly well in soft rock, medium-hard rock, and complex strata containing hard layers or fracture zones. The drill tip 40 has a conical structure and its sidewalls are provided with small threads for drilling.

[0030] Additionally, it should be noted that the tool holder 301 and the working rod 10, and the connector 50 and the working rod 10 are preferably fixedly connected by a welded structure.

[0031] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

Claims

1. A drill bit structure with replaceable drill tip and cutting tools, comprising a working rod and blades disposed on the working rod, characterized in that, The lower end of the working rod is equipped with a tool holder, on which a cutting blade is detachably mounted, and a drill tip is detachably mounted at the bottom of the tool holder. During drilling, when the cutting blade or drill tip becomes worn or damaged, the cutting blade or drill tip can be partially replaced through the aforementioned disassembly structure. The tool holder is equipped with several mounting plates, and the cutting blade is fixed to the mounting plates by countersunk screws. The bottom of the tool holder is equipped with a shaped hole, and the top of the drill tip is equipped with an insertion head that matches the shape of the shaped hole. After the insertion head is inserted into the shaped hole, it is fixed by fasteners.

2. The drill bit structure with replaceable drill tip and cutting tools according to claim 1, characterized in that, Both the mounting plate and the blade are at an angle of 10-30 degrees to the horizontal plane.

3. The drill bit structure with replaceable drill tip and cutting tools according to claim 1, characterized in that, The mounting base has two plates, each equipped with either a flat blade or a serrated blade.

4. The drill bit structure with replaceable drill tip and cutting tools according to claim 3, characterized in that, The blade includes a first helical blade and a second helical blade. The first helical blade extends helically from the upper side of the working rod to the top of one of the blades. The second helical blade is offset from the first helical blade in the circumferential direction and extends from the lower side of the working rod to the top of the other blade.

5. The drill bit structure with replaceable drill tip and cutting tools according to claim 1, characterized in that, The top of the working rod is provided with a connector, and the top of the connector is provided with a socket and a fastening hole extending horizontally from the side wall of the socket.

6. The drill bit structure with replaceable drill tip and cutting tools according to claim 5, characterized in that, The socket is a round hole or an irregularly shaped hole, and the side wall of the socket is provided with a spline groove.

7. The drill bit structure with replaceable drill tip and cutting tools according to claim 1, characterized in that, The blade is an alloy blade.

8. The drill bit structure with replaceable drill tip and cutting tools according to claim 1, characterized in that, The drill tip is made of cast steel.

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