Reaming arm type drill bit

Abstract

The utility model discloses a chambering arm type drill bit which comprises a drill rod, the bottom of the drill rod is fixedly connected with a chambering arm type drill bit mechanism, the chambering arm type drill bit mechanism comprises a drill seat body, and the drill seat body comprises an upper drill seat part and a lower drill seat part integrally formed with the upper drill seat part; a plurality of reaming arm structures are installed on the upper drill seat part in a hinged mode, each reaming arm structure comprises a reaming arm arranged in a hinged mode, and a reaming tooth structure is integrally formed on each reaming arm. The upper drill seat part is provided with a plurality of elastic jacking structures used for elastically jacking the reaming arm, and the reaming arm keeps a reaming opening posture through the elastic jacking structures. According to the device disclosed by the utility model, a hole groove with a larger size is formed through the drill bit with a small size, the working efficiency is high, and the flexibility and operability of the drill bit are high in the working process.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of reaming arm, especially relates to a reaming arm type drill bit. BACKGROUND

[0002] The drill bit is a kind of hole opening, slotting equipment frequently used in industry, such as in the field of mining, through drill bit, the slot body of larger depth can be set up.During the working process of drill bit, in order to improve the slotting capacity of drill bit, the drill bit is installed on the drill bit in the prior art and other structures are used to improve the crushing of hard material, such as rock, during drilling process.

[0003] However, in actual working process, when the size of the set slot is required, such as in the process of mining operation, when the hole slot needs to be drilled on the geological structure with higher soil softness, the conventional drill bit cannot increase the size of the set hole slot due to the more biased structure for crushing hard material, so in actual working process, only larger drill bit of size and model can be used for operation.

[0004] Obviously, the larger the size and model of the drill bit, the lower the flexibility and operability during the working process, and the use of large drill bit for reaming operation on the geological structure with soft soil not only has great difficulty, but also has more cumbersome installation, disassembly and other processes during the working process of drill bit.

[0005] Therefore, in actual working process, if the drill bit of small model and capable of reaming operation during drilling process can be used, not only the operation efficiency is improved, but also the flexibility of drill bit operation, including installation, disassembly, drill bit rotation and other aspects has obvious advantages.

[0006] But obviously, the current drill bit cannot meet the above working needs, so in actual working process, it is very important to design a drill bit with high flexibility and capable of reaming operation to improve the efficiency of drill bit operation. INVENTION CONTENTS

[0007] Based on the above background, the purpose of the utility model is to provide a reaming arm type drill bit.

[0008] To achieve the above purpose, the utility model adopts the following technical scheme:

[0009] A reaming arm type drill bit, comprising a drill rod, the bottom of the drill rod is fixedly connected with a reaming arm type drill bit mechanism, the reaming arm type drill bit mechanism comprises a drill seat body, the drill seat body comprises an upper drill seat part and a lower drill seat part integrally formed with the upper drill seat part;

[0010] A plurality of reaming arm structures are hingedly installed on the upper drill seat part, the reaming arm structure comprises a reaming arm hingedly arranged, and a reaming tooth structure is integrally formed on the reaming arm;

[0011] The upper drill base is equipped with several spring-loaded structures for elastically supporting the reaming arm, and the reaming arm is kept in the reaming open position by means of the spring-loaded structures.

[0012] Preferably, a plurality of drill bit structures are fixedly connected to the bottom of the lower drill base;

[0013] The drill bit structure includes a drill bit, on which a plurality of protruding teeth are integrally formed.

[0014] Preferably, the upper drill base is provided with a plurality of hinge slots, and the inner end of the reaming arm is hinged in the hinge slots by a fixed pin.

[0015] The hole-enlarging arm includes a triangular arm with a triangular structure, and the hole-enlarging tooth structure is integrally formed on the top surface and the inclined surface of the triangular arm.

[0016] Preferably, the enlarged tooth structure includes a plurality of teeth integrally formed on the top surface of the triangular arm; the cross-sectional shape of the teeth is rectangular.

[0017] Preferably, the enlarged hole tooth structure further includes a plurality of enlarged hole teeth integrally formed on the inclined surface of the triangular arm portion;

[0018] The cross-sectional shape of the enlarged tooth is triangular.

[0019] Preferably, the spring top structure includes a fixing screw fixedly connected to the bottom of the hinge slot, and the fixing screw is threadedly connected to an adjusting rod with adjustable height;

[0020] The adjusting rod is slidably connected to a spring top rod, and a top seat is fixedly connected to the top of the spring top rod. A spring is sleeved on the spring top rod, and the two ends of the spring are fixedly connected to the bottom of the top seat and the top of the adjusting rod, respectively.

[0021] Preferably, the lower drill base is fixedly connected to a spiral cutter disc.

[0022] Preferably, a mounting base is fixedly connected to the top of the drill rod.

[0023] Preferably, the upper drill base is hinged with three circumferentially arrayed reaming arm structures.

[0024] This utility model has the following beneficial effects:

[0025] 1. Through the spring-loaded mechanism, during operation, as the reaming arm gradually descends from its open position (e.g., as the drill speed decreases), the reaming arm pre-contacts the top seat. The fixed seat, under pressure, descends, and with the assistance of a spring, the reaming arm springs back up, reopening itself. This method ensures that the reaming arm remains open regardless of the drill bit's speed, thereby maintaining the correct hole width.

[0026] 2. During operation, when the entire device is installed on the working equipment (drilling rig), the high-speed rotating reaming arm drill bit mechanism drills into the geological structure. Because the entire device operates in a relatively soft soil environment, the rotating reaming arms swing out during operation, increasing the distance between the reaming arms and thus enlarging the borehole.

[0027] The reaming teeth on the triangular arm break up harder materials in the geological structure, such as rocks, during rotation. This method achieves hole enlargement during drilling.

[0028] 3. The device disclosed in this utility model enables the opening of large-sized holes and slots using a small drill bit, which not only has high work efficiency, but also high flexibility and operability of the drill bit during operation. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the overall structure in an embodiment of the present utility model;

[0031] Figure 2 This is a schematic diagram of the hole-reaming arm drill bit mechanism in an embodiment of the present utility model;

[0032] Figure 3 This is one of the structural schematic diagrams of the projectile top structure in the embodiments of this utility model;

[0033] Figure 4 This is the second schematic diagram of the top structure in the embodiment of this utility model;

[0034] Figure 5 This is a schematic diagram of the planar structure of the reaming arm type drill bit mechanism in an embodiment of this utility model.

[0035] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0037] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0038] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0039] Example 1

[0040] like Figures 1-5 As shown, a reaming arm type drill bit includes a drill rod 1, which is the same as the existing structure. A matching mounting base 11 is fixedly connected to the top of the drill rod. The entire device is installed on the working equipment, such as the output shaft of the drilling machine, through the mounting base 11. Specifically, it is the same as the existing drill bit installation method. The mounting base 11 has a threaded groove.

[0041] The bottom of the drill rod 1 is fixedly connected to a hole-reaming arm type drill bit mechanism 2, which enables hole-reaming operations to be carried out on soft geological structures while the drill bit is drilling during operation.

[0042] Specifically, the reaming arm type drill bit mechanism 2 includes a drill base body with a cylindrical structure, which includes an upper drill base part 21 and a lower drill base part 22 integrally formed with the upper drill base part 21.

[0043] The upper drill base 21 is hinged with three circumferentially arrayed reaming arm structures 23. The reaming arm structure 23 includes a reaming arm 231 that is hinged. Specifically, the upper drill base 21 has three corresponding hinge slots, and the inner end of the reaming arm 231 is hinged in the hinge slot by a fixed pin.

[0044] Specifically, the enlarged hole arm 231 includes a triangular arm portion with a triangular structure. According to the existing hinge method, the inner end of the triangular arm portion is hinged to the hinge slot by a pin.

[0045] Meanwhile, the expanding arm 231 is integrally formed with an expanding tooth structure. Specifically, the expanding tooth structure is integrally formed on the top surface and the inclined surface of the triangular arm. Specifically, the expanding tooth structure includes a number of teeth 2311 integrally formed on the top surface of the triangular arm (the teeth 2311 are spaced apart); the cross-sectional shape of the teeth 2311 is rectangular.

[0046] Meanwhile, the enlarged hole tooth structure also includes several enlarged hole teeth 2312 integrally formed on the inclined surface of the triangular arm; the cross-sectional shape of the enlarged hole teeth 2312 is triangular.

[0047] During operation, when the entire device is installed on the working equipment (drilling rig), the high-speed rotating reaming arm 231 drill bit mechanism 2 drills into the geological structure. Because the entire device operates in a relatively soft soil environment, the rotating reaming arm 231 swings out during operation, increasing the distance between the reaming arms 231, thereby enlarging the borehole.

[0048] The reaming teeth on the triangular arm break up harder materials in the geological structure, such as rocks, during rotation. This method achieves hole enlargement during drilling.

[0049] Example 2

[0050] like Figures 1-5 As shown, in this embodiment, based on the structure of embodiment 1, a plurality of spring-loaded structures 232 for elastically supporting the reaming arm 231 are installed on the upper drill base 21, and the reaming arm 231 is kept in the reaming open posture by means of the spring-loaded structures 232.

[0051] Specifically, the spring top structure 232 includes a fixing screw 2325 fixedly connected to the bottom of the hinge slot. The fixing screw 2325 is threadedly connected to an adjusting rod 2324 with adjustable height (the bottom of the adjusting rod 2324 has a threaded groove of a certain depth, which allows the height to be adjusted by rotating the adjusting rod 2324. The height adjustment adjusts the opening range of the expanding arm 231. For example, the higher the height, the larger the opening range of the expanding arm 231 will always be.)

[0052] Meanwhile, the adjusting rod 2324 is slidably connected to a spring top rod 2322 (a sliding cavity is opened on the adjusting rod 2324), the top of the spring top rod 2322 is fixedly connected to a top seat 2321, and a spring 2323 is sleeved on the spring top rod 2322. The two ends of the spring 2323 are respectively fixedly connected to the bottom of the top seat 2321 and the top of the adjusting rod 2324.

[0053] During operation, as the reaming arm 231 gradually descends from its open position (e.g., as the drill speed decreases), it contacts the top seat 2321 beforehand. The top seat 2321, under pressure, descends and, with the assistance of the spring 2323, springs back up, reopening the reaming arm 231. This method ensures that the reaming arm 231 remains open regardless of the drill bit's speed, thus maintaining the correct width of the reamed hole.

[0054] Example 3

[0055] like Figures 1-5 As shown, in this embodiment, based on the structure of embodiment 2, a plurality of drill bit structures are fixedly connected to the bottom of the lower drill base 22; the drill bit structure includes a drill bit 222, and a plurality of protruding teeth are integrally formed on the drill bit 222.

[0056] Meanwhile, a spiral cutter 221 is fixedly connected to the lower drill base 22. The spiral cutter 221 is welded to the lower drill base 22, thereby improving the drill bit structure's ability to break hard materials and enhancing drilling efficiency.

[0057] Of course, the above description is not intended to limit the present utility model, and the present utility model is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present utility model should also fall within the protection scope of the present utility model.

Claims

1. A reamer drill bit comprising a drill string, characterized by, The bottom of the drill rod is fixedly connected with a reaming arm type drill bit mechanism, which comprises a drill seat body, the drill seat body comprising an upper drill seat part and a lower drill seat part integrally formed with the upper drill seat part; A plurality of reaming arm structures are hingedly installed on the upper drill seat part, the reaming arm structure comprising a reaming arm hingedly arranged, the reaming arm integrally formed with a reaming tooth structure; A plurality of elastic supporting structures are installed on the upper drill seat part for elastically supporting the reaming arm, the reaming arm kept in an open position by the elastic supporting structure.

2. The pilot arm drill bit of claim 1, wherein, The bottom of the lower drill seat part is fixedly connected with a plurality of drill bit structures; The drill bit structure comprises a drill bit integrally formed with a plurality of convexly arranged convex teeth.

3. The pilot arm drill bit of claim 1, wherein, A plurality of hinged grooves are formed in the upper drill seat part, the inner end of the reaming arm hingedly arranged in the hinged groove by a fixed pin shaft. The reaming arm comprises a triangular arm part, the reaming tooth structure integrally formed on the top surface and the inclined surface of the triangular arm part.

4. The pilot arm drill bit of claim 3, wherein, The reaming tooth structure comprises a plurality of integrally formed teeth on the top surface of the triangular arm part; the cross-sectional shape of the teeth is rectangular.

5. The pilot arm drill bit of claim 4, wherein, The reaming tooth structure further comprises a plurality of reaming teeth integrally formed on the inclined surface of the triangular arm part. The cross-sectional shape of the reaming tooth is triangular.

6. The pilot arm drill bit of claim 3, wherein, The elastic supporting structure comprises a fixed screw rod fixedly connected at the bottom of the hinged groove, the fixed screw rod threadedly connected with an adjustable rod with adjustable height; The adjustable rod is slidingly connected with a spring push rod, the top of the spring push rod fixedly connected with a top seat, the spring sleeved on the spring push rod, the two ends of the spring fixedly connected at the bottom of the top seat and the top of the adjustable rod.

7. The pilot arm drill bit of claim 1, wherein, The lower drill seat part is fixedly connected with a helically arranged spiral disc cutter.

8. The pilot arm drill bit of claim 1, wherein, The top of the drill rod is fixedly connected with a mounting seat.

9. The pilot arm drill bit of claim 1, wherein, Three circumferentially arrayed reaming arm structures are hingedly installed on the upper drill seat part.

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