Diamond drill bit shackle structure

Abstract

The utility model discloses a diamond drill bit shackle structure, and relates to the technical field of trenchless construction and the like, the diamond drill bit shackle structure comprises a drill bit body and a clamping assembly, the drill bit body comprises a drill bit handle and a plurality of blades, one ends of the blades are gathered at the bottom end of the drill bit handle, and the other ends of the blades extend outwards. An upper buckling groove and a shackle groove are formed in the cutter wing, and the upper buckling groove and the shackle groove are formed in the two side walls of the cutter wing respectively; the clamping assembly comprises a shackle plate with a penetrating through hole formed in the middle, and protruding teeth which are used for entering the position between every two adjacent blades and are embedded into the upper buckling groove and the shackle groove of one blade are arranged on the inner wall of each penetrating through hole. According to the drill bit, the axial length of the drill bit is not additionally occupied while quick screwing-on and screwing-off are guaranteed, and meanwhile the screwing-on and screwing-off stability and the deformation resistance are guaranteed.

Description

Technical Field

[0001] This utility model relates to the technical field of trenchless construction, and specifically to a diamond drill bit unhooking structure. Background Technology

[0002] Existing PDC drill bits typically consist of a drill body and a taper shank. The drill body is equipped with fixed cutter wings and chip removal grooves, while the taper shank is equipped with tapered threads. The drill body is detachably connected to an external power component via the tapered threads. By rotating the drill body in different directions, the purpose of adding and removing threads can be achieved.

[0003] In existing common methods, a shackle groove is usually set at the lower part of the taper shank. However, this setting increases the axial length of the entire drill bit. Directional drilling requires shortening the drill bit length. Another method is to add a shackle groove in the chip removal groove. Although this method effectively shortens the length of the diamond drill bit, the shackle groove is limited by the nozzle position and the chip removal groove, and its depth is relatively shallow. The drill bit shackle groove is also prone to deformation. Utility Model Content

[0004] This application provides a diamond drill bit shackle structure, which can solve the technical problems existing in the prior art. Setting a shackle groove at the lower part of the taper shank increases the axial length of the drill bit, which will affect the normal operation of the drill bit in practical applications. Also, setting some shackle grooves in the chip removal groove results in shallow shackle grooves and easy deformation of the drill bit shackle grooves.

[0005] This application provides a diamond drill bit shackle structure, including:

[0006] The drill bit body includes a drill bit shank and multiple cutting blades. One end of each cutting blade is converged at the bottom of the drill bit shank, and the other end extends outward. The cutting blades are provided with an upper locking groove and a lower locking groove, which are respectively provided on the two side walls of the cutting blades.

[0007] The engaging assembly includes a shackle plate with a through hole in the middle. The inner wall of the through hole is provided with protruding teeth for entering between two adjacent blades and embedding into the upper buckle groove of one blade or the upper buckle groove of the other blade.

[0008] In one embodiment, the drill bit body further includes a shank cone located at the top of the drill bit shank, and a limiting skirt is provided between the shank cone and the drill bit shank, the limiting skirt having a top surface facing the shank cone and a bottom surface facing the drill bit shank.

[0009] In one embodiment, a limiting skirt is provided between the shank cone and the drill bit shank, and the extended end of the cutter wing is integrally formed with the bottom surface of the limiting skirt.

[0010] In one embodiment, the bottom surface of the limiting skirt is provided with a first engaging slope.

[0011] In one embodiment, the top surface of the protruding tooth facing the drill bit shank is provided with a second engagement bevel for engaging with the first engagement bevel.

[0012] In one embodiment, the engaging assembly further includes a limiting wooden wedge located on one side of the protruding tooth to restrict the current embedded state of the protruding tooth.

[0013] In one embodiment, the limiting wooden wedge is selectively disposed on one side of the upper buckle groove and one side of the shackle groove, and when the protruding tooth is embedded in the upper buckle groove, the limiting wooden wedge is located on one side of the shackle groove, and when the protruding tooth is embedded in the shackle groove, the limiting wooden wedge is located on one side of the upper buckle groove.

[0014] In one embodiment, the thickness of the protruding tooth is less than the height of the upper buckle groove and the shackle groove.

[0015] In one embodiment, the inner wall of the through hole is provided with at least two of the protruding teeth.

[0016] In one embodiment, the diameter of the through hole is greater than the maximum diameter of the drill bit body.

[0017] The beneficial effects of the technical solutions provided in this application include:

[0018] 1. Compared with the traditional design where the shackle groove is located on the shank, this application places the upper shackle groove and the shackle groove in the space on both sides of the cutter wing, which can shorten the axial length of the drill bit body, increase the directional capability, effectively shorten the drilling time in the directional section, and improve drilling efficiency.

[0019] 2. The blade wings are supported by high-strength materials, which have sufficient rigidity and thickness. Therefore, the upper buckle groove and the shackle groove are arranged on the two side walls of the blade wings, and their opening positions can also appropriately increase the groove depth, which can ensure the strength and deformation resistance of the upper buckle groove and the shackle groove.

[0020] 3. The shackle plate fits around the outer periphery of the drill bit body, and its protruding teeth engage with the upper or lower shackle groove on the cutter wing to ensure normal shackle operation and improve the ease of shackle operation. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A schematic diagram of a diamond drill bit shackle structure provided in this application;

[0023] Figure 2 This application provides a schematic diagram of the shackle plate structure in a diamond drill bit shackle structure;

[0024] Figure 3 A schematic diagram of the drill shank structure in a diamond drill bit shackle structure provided in this application;

[0025] Figure 4 This is a schematic diagram of the fitting structure between the limiting skirt and the protruding tooth in a diamond drill bit shackle structure provided in this application.

[0026] In the diagram: 1. Drill shank; 2. Cutting blade; 3. Upper locking groove; 4. Shackle groove; 5. Through hole; 6. Shackle plate; 7. Protruding tooth; 701. Second engagement bevel; 8. Shank cone; 9. Limiting skirt; 901. First engagement bevel; 10. Limiting wooden wedge. Detailed Implementation

[0027] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0028] This application provides a diamond drill bit shackle structure that solves the technical problems in the prior art where setting a shackle groove at the lower part of the taper shank increases the axial length of the drill bit, which affects the normal operation of the drill bit in practical applications; and where some shackle grooves are set in the chip removal groove, resulting in shallow shackle grooves and easy deformation of the drill bit shackle grooves.

[0029] This application provides a diamond drill bit uncoupling structure, which includes a drill bit body and a locking assembly. The locking assembly is engaged with the drill bit body. By rotating the locking assembly, the drill bit body is driven to rotate relative to an external power component, thereby achieving the purpose of uncoupling.

[0030] Specifically, Figure 1 This application provides a structural schematic diagram of a diamond drill bit shackle structure, as shown below. Figure 1 As shown, the drill bit body includes a drill bit shank 1 and multiple cutter wings 2. One end of the cutter wings 2 is joined together at the bottom end of the drill bit shank 1, and the other end extends outward. The cutter wings 2 are provided with an upper locking groove 3 and a release groove 4, which are respectively provided on the two side walls of the cutter wings 2.

[0031] The top of the drill bit shank 1 is used to connect the drill string and transmit torque and drilling pressure. One end of the cutter blade 2 is fused with the bottom end of the drill bit shank 1 to form a whole, and the other end radiates outward and forms a whole with the outer circumferential wall of the drill bit shank 1. Cutting teeth are provided on its outer circumference, and the included angle formed between each pair of adjacent cutter blades 2 is equal. In one possible embodiment, the number of cutter blades 2 is 3 to 8 to ensure the stability of the drill bit and the cleaning efficiency.

[0032] The blade wing 2 is provided with an upper locking groove 3 and a detaching groove 4. The upper locking groove 3 and the detaching groove 4 are respectively provided on the two side walls of the blade wing 2. That is, the upper locking groove 3 is provided on one side of the same blade wing 2, and the detaching groove 4 is provided on the other side. In two adjacent blade wings 2, the upper locking groove 3 on one blade wing 2 is directly opposite the detaching groove 4 on the other blade wing 2. In one possible embodiment, both the upper locking groove 3 and the detaching groove 4 are configured as elongated strips.

[0033] The blade wing 2 is supported by high-strength materials and has sufficient rigidity and thickness. Therefore, arranging the upper locking groove 3 and the shackle groove 4 on both sides of the blade wing 2 can ensure the strength and deformation resistance of the upper locking groove 3 and the shackle groove 4. Compared with the method of setting the shackle groove in the chip removal groove, the arrangement method in this application can increase the arrangement depth of the upper locking groove 3 and the shackle groove 4, and further ensure the stability during locking and unlocking.

[0034] Furthermore, Figure 2 This application provides a schematic diagram of the shackle plate 6 in a diamond drill bit shackle structure, as shown below. Figure 2 As shown, the locking assembly includes a shackle plate 6 with a through hole 5 in the middle. The diameter of the through hole 5 is larger than the maximum diameter of the drill bit body so that during the locking and unlocking process, the shackle plate 6 can be fitted into the outer periphery of the drill bit body and remain relatively stationary with respect to the drill bit body. The inner wall of the through hole 5 is provided with a protruding tooth 7 for entering between two adjacent blades 2 to selectively embed into the locking groove 3 and the unlocking groove 4. A chip removal groove is formed between two adjacent blades 2. The protruding tooth 7 is conical in shape to protrude into the chip removal groove, and the width of the chip removal groove is greater than the width of the protruding tooth 7. That is, from a top view, the shackle plate 6 can rotate a certain angle around the drill bit body to drive the protruding tooth 7 to move laterally in the chip removal groove.

[0035] The length of the protruding tooth 7 is less than the depth of the chip removal groove. That is, after the protruding tooth 7 is completely inserted into the chip removal groove, the front end of the protruding tooth 7 is still a certain distance away from the outer circumferential wall of the drill bit shank 1 to avoid damage to the outer circumferential wall of the drill bit shank 1. In one possible embodiment, the front end of the protruding tooth 7 is arc-shaped.

[0036] The shackle plate 6 fits around the outer periphery of the drill bit body so that the protruding tooth 7 is at the same height as the upper shackle groove 3 and the shackle groove 4. When shackle is needed, the shackle plate 6 rotates to one side, and one side of the protruding tooth 7 begins to approach the side wall of one of the two adjacent cutter wings 2 until it is embedded in the upper shackle groove 3 on that cutter wing 2. Then, the shackle plate 6 continues to rotate in the same direction, so that the shackle plate 6 drives the drill bit body to rotate relative to the external power component, thus achieving a threaded connection. Similarly, when shackle is needed, the shackle plate 6 rotates in the opposite direction until one side of the protruding tooth 7 approaches the side wall of the other cutter wing 2 and is embedded in the shackle groove 4 on that cutter wing 2. Then, the shackle plate 6 continues to rotate in the same direction to complete the shackle. The engagement of the shackle plate 6 with the drill bit body, together with the drill rod in the external power component, rotates relative to each other, thus achieving the purpose of shackle engagement and shackle disengagement.

[0037] In one possible implementation, to facilitate the application of force by workers during the fastening and unfastening process, the shackle plate 6 in this application is configured as a square plate.

[0038] Furthermore, Figure 3 This application provides a schematic diagram of the drill shank 1 structure in a diamond drill bit shackle structure, as shown below. Figure 3 As shown, the drill bit body also includes a shank cone 8 located at the top of the drill bit shank 1. The shank cone 8 has external threads on its outer periphery. The shank cone 8 is a cylindrical structure with external threads on its outer periphery for threaded connection with external power components. It is integrally formed with the drill bit shank 1.

[0039] A limiting skirt 9 is provided between the connecting end and the drill bit shank 1. The limiting skirt 9 is an annular protrusion and is integrally formed with the drill bit shank 1. It is used to limit the shackle plate 6 and prevent the drill bit shank 1 from coming off the shackle plate 6. The limiting skirt 9 has a top surface facing the shank cone 8 and a bottom surface facing the drill bit shank 1. The extended end of the blade 2 is integrally formed with the bottom surface of the limiting skirt 9. That is, one end of the blade 2 converges at the center point of the bottom end of the drill bit shank 1, and the other end extends outward and passes through the outer circumferential wall of the drill bit shank 1 in sequence before finally forming integral with the bottom surface of the limiting skirt 9.

[0040] Furthermore, Figure 4 This application provides a schematic diagram of the fitting structure between the limiting skirt 9 and the protruding tooth 7 in a diamond drill bit shackle structure. Figure 4As shown, the limiting skirt 9 has a first engaging inclined surface 901 on the bottom surface facing the drill bit shank 1, and the top surface of the protruding tooth 7 facing the end of the drill bit shank 1 has a second engaging inclined surface 701 for cooperating with the first engaging inclined surface 901. The top surface of the limiting skirt 9 facing the shank cone 8 can be a plane, which is not limited here. The limiting skirt 9 extends a certain distance away from the central axis of the drill bit shank 1 so that when the protruding tooth 7 is fully inserted into the chip removal groove and the protruding tooth 7 is at the same height as the upper buckling groove 3 and the detaching groove 4, the top of the front end of the protruding tooth 7 contacts the bottom of the limiting skirt 9. The limiting skirt 9 is inclined towards the bottom surface of the drill bit shank 1. It can be inclined towards the shank cone 8 or towards the drill bit shank 1. This application does not limit it, but the first engaging inclined surface 901 and the second engaging inclined surface 701 need to cooperate with each other to fit together.

[0041] Further details can be found here. Figure 3 The engaging assembly also includes a limiting wooden wedge 10 located on one side of the protruding tooth 7 to restrict the current embedded state of the protruding tooth 7. The limiting wooden wedge 10 is selectively positioned on one side of the upper locking groove 3 and the other side of the detaching groove 4. When the side of the protruding tooth 7 is embedded in one of the two adjacent blade wings 2, and one blade wing 2 is in the upper locking groove 3 or detaching groove 4, the limiting wooden wedge 10 is positioned on the side of the protruding tooth 7 away from the upper locking groove 3 or detaching groove 4, to fill the gap between the protruding tooth 7 and the other blade wing 2 in the two adjacent blade wings 2, ensuring a secure engagement. That is, when the protruding tooth 7 is embedded in the upper locking groove 3, the limiting wooden wedge 10 is located on the side of the detaching groove 4; when the protruding tooth 7 is embedded in the detaching groove 4, the limiting wooden wedge 10 is located on the side of the upper locking groove 3.

[0042] Furthermore, in conjunction with the above description, the upper locking groove 3 and the shackle groove 4 are square, with their length direction being the axial direction of the drill bit body. The thickness of the protruding tooth 7 is consistent with the axial direction of the drill bit body. Therefore, in order to ensure that the protruding tooth 7 can be smoothly inserted laterally into the upper locking groove 3 and the shackle groove 4, in this application, the thickness of the protruding tooth 7 is less than the height of the upper locking groove 3 and the shackle groove 4.

[0043] Furthermore, generally, there are at least three blade wings 2, forming three chip removal grooves. To ensure engagement stability and distribute the stress on the upper locking groove 3, the shackle groove 4, and the protruding teeth 7 during locking and unlocking, in this application, at least two protruding teeth 7 are provided on the inner wall of the through hole 5. The two protruding teeth 7 can be embedded in two adjacent chip removal grooves or in two opposite chip removal grooves. This application does not impose specific limitations. The inner wall of the through hole 5 without protruding teeth 7 can be configured as a normal arc shape and surround the outer periphery of other blade wings 2. However, the included angle between two adjacent protruding teeth 7 must be equal to the included angle between two adjacent blade wings 2 to ensure that when the shackle plate 6 is rotated, multiple protruding teeth 7 are simultaneously embedded in the corresponding upper locking groove 3 or shackle groove 4.

[0044] Meanwhile, as an optional embodiment, upper buckle groove 3 and lower buckle groove 4 can be provided on both sides of each blade wing 2. When attaching or detaching, the protruding teeth 7 in the detachment plate 6 can be freely embedded into any two adjacent blade wings 2, improving convenience. Alternatively, based on the spacing of the protruding teeth 7, upper buckle groove 3 and lower buckle groove 4 can be provided on several specific blade wings 2. When attaching or detaching, the protruding teeth 7 in the detachment plate 6 are fixedly engaged with the blade wings 2 provided with upper buckle groove 3 and lower buckle groove 4, reducing the cumbersomeness of grooving during molding.

[0045] The working mechanism of the diamond drill bit shackle structure in this application is as follows. Taking the upper shackle process as an example, the shackle plate 6 is fitted around the outer periphery of the drill bit shank 1 so that the protruding tooth 7 enters between the two adjacent blades 2, and the protruding tooth 7 is at the same height as the upper shackle groove 3 and the shackle groove 4. The top of the front end of the protruding tooth 7 is in contact with the bottom of the limiting skirt 9. Then, the shackle plate 6 is slightly rotated so that the side of the protruding tooth 7 is embedded in the upper shackle groove 3 of one of the two adjacent blades 2. Then, the limiting wooden wedge 10 is embedded in the gap between the protruding tooth 7 and the side wall of the other blade 2 of the two adjacent blades 2 to fix the embedded posture of the protruding tooth 7. Then, the shackle plate 6 is rotated in the same direction to drive the drill bit body to rotate together and complete the upper shackle.

[0046] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0047] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0048] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A diamond drill bit shackle structure, characterized in that, include: The drill bit body includes a drill bit shank (1) and multiple cutter wings (2). One end of each cutter wing (2) is converged at the bottom end of the drill bit shank (1), and the other end extends outward. The cutter wings (2) are provided with an upper locking groove (3) and a lower locking groove (4). The upper locking groove (3) and the lower locking groove (4) are respectively provided on the two side walls of the cutter wings (2). The engaging assembly includes a buckle plate (6) with a through hole (5) in the middle. The inner wall of the through hole (5) is provided with protruding teeth (7) for entering between two adjacent blades (2) and embedding into the upper buckle groove (3) of one blade (2) or the upper buckle groove (4) of the other blade (2).

2. The diamond drill bit shackle structure as described in claim 1, characterized in that: The drill bit body also includes a shank cone (8) located at the top of the drill bit shank (1), and a limiting skirt (9) is provided between the shank cone (8) and the drill bit shank (1). The limiting skirt (9) has a top surface facing the shank cone (8) and a bottom surface facing the drill bit shank (1).

3. The diamond drill bit shackle structure as described in claim 2, characterized in that: The extended end of the blade (2) is integrated with the bottom surface of the limiting skirt (9).

4. The diamond drill bit shackle structure as described in claim 3, characterized in that: The bottom surface of the limiting skirt (9) is provided with a first engaging inclined surface (901).

5. The diamond drill bit shackle structure as described in claim 4, characterized in that: The protruding tooth (7) has a second engaging slope (701) on its top surface facing the drill bit shank (1) for engaging with the first engaging slope (901).

6. The diamond drill bit shackle structure as described in claim 1, characterized in that: The engaging assembly also includes a limiting wooden wedge (10) located on one side of the protruding tooth (7) to limit the current embedded state of the protruding tooth (7).

7. The diamond drill bit shackle structure as described in claim 6, characterized in that: The limiting wooden wedge (10) is selectively disposed on one side of the upper buckle groove (3) and one side of the shackle groove (4). When the protruding tooth (7) is embedded in the upper buckle groove (3), the limiting wooden wedge (10) is located on one side of the shackle groove (4). When the protruding tooth (7) is embedded in the shackle groove (4), the limiting wooden wedge (10) is located on one side of the upper buckle groove (3).

8. The diamond drill bit shackle structure as described in claim 1, characterized in that: The thickness of the protruding tooth (7) is less than the height of the upper buckle groove (3) and the shackle groove (4).

9. The diamond drill bit shackle structure as described in claim 1, characterized in that: The inner wall of the through hole (5) is provided with at least two of the protruding teeth (7).

10. A diamond drill bit shackle structure as described in claim 9, characterized in that: The diameter of the through hole (5) is greater than the maximum diameter of the drill bit body.

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