Combined guide reamer bit

Abstract

The utility model relates to the technical field of reamer bits, and discloses a combined guide reamer bit which comprises a main body structure and a buffer structure, the buffer structure is arranged at the top of the main body structure, the main body structure comprises a reamer bit, and a drill rod is fixedly connected to the top of the reamer bit. A mounting rod is inserted into a mounting groove in the bottom of a reamer bit, so that the mounting rod is jacked into a limiting clamping groove, the mounting rod is rotated clockwise, a positioning groove in the mounting rod is aligned with a fixing groove in the limiting clamping groove, a reset spring exerts outward acting force on a fixing block, and the fixing block is separated from the fixing groove and clamped into the positioning groove; and when the guide drill bit needs to be detached and replaced, the guide drill bit can be detached only by rotating the guide drill bit anticlockwise, enabling the fixing block to be extruded to retract into the fixing groove and releasing the limiting and fixing of the mounting rod, so that the guide drill bit is convenient to detach and install. And the drilling efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hole reaming drill bits, in particular to a combined guide hole reaming drill bit. Background Art

[0002] With the increasing efforts in highway, energy and infrastructure construction, the application prospects of reaming drill bits are becoming more and more extensive in energy extraction and underground infrastructure construction due to their own structural characteristics. At present, in the applications of tunnel support, pipeline laying in infrastructure projects, etc., reaming drill tools are required for drilling due to the particularity of geological structure and construction. During drilling, the guide drill bit first drills a guide hole to facilitate positioning and reaming with the reaming drill bit, which is conducive to the smooth progress of drilling.

[0003] At present, the reaming drill bits used in the market are assembled by a pilot drill bit and a reaming drill bit. During the drilling process, because the pilot drill bit plays the role of both guiding the drill and guiding, it will be aggravated by wear or directly damaged due to the complex geological structure and different use environments. When replacing the pilot drill bit, special tools are required to remove the pilot drill bit, which has the problems of inconvenient replacement of the pilot drill bit and low drilling efficiency. Utility Model Content

[0004] The purpose of the utility model is to provide a combined guide reaming drill bit to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions: a combined guide reaming drill bit, comprising a main body structure and a buffer structure, wherein the buffer structure is arranged on the top of the main body structure;

[0006] The main structure comprises a reaming drill bit, the top of which is fixedly connected to a drill rod, a mounting rod is clamped inside the reaming drill bit, and a guide drill bit is fixedly connected to the bottom of the mounting rod.

[0007] Preferably, a mounting groove is provided on the lower surface of the reaming drill bit, and a limiting slot is connected to the top of the mounting groove. The shapes and sizes of the mounting groove and the limiting slot are adapted to the mounting rod.

[0008] Preferably, a fixing groove is provided on the inner wall of the limiting slot, a reset spring is fixedly connected to the inner bottom wall of the fixing groove, a fixing block is fixedly connected to the top of the reset spring, and the top of the fixing block is semicircular.

[0009] Preferably, a positioning groove is provided on the lower surface of the mounting rod, and the shape and size of the positioning groove are matched with the fixing groove.

[0010] Preferably, the buffer structure comprises a buffer seat, a support block is fixedly connected to the inner bottom wall of the buffer seat, and a buffer spring is fixedly connected to the top of the support block.

[0011] Preferably, one end of the drill rod away from the reaming drill bit is arranged inside the buffer seat, and one end of the buffer spring away from the support block is fixedly connected to the outer wall of the drill rod.

[0012] Preferably, buffer blocks are arranged on both sides of the support block, and the buffer blocks are higher than the support block.

[0013] Compared with the prior art, the beneficial effects achieved by the utility model are:

[0014] First, the utility model inserts the mounting rod into the mounting groove at the bottom of the reaming drill bit, so that the mounting rod is pushed into the limiting groove, and the mounting rod is rotated clockwise to align the positioning groove on the mounting rod with the fixing groove on the limiting groove. The reset spring applies an outward force to the fixing block, so that the fixing block is separated from the fixing groove and snaps into the positioning groove, thereby completing the limiting fixation of the mounting rod and the installation of the guide drill bit. When the guide drill bit needs to be removed and replaced, it only needs to rotate the guide drill bit counterclockwise to squeeze the fixing block back into the fixing groove, release the limiting fixation of the mounting rod, and then the guide drill bit can be removed, which is convenient for disassembly and assembly of the guide drill bit and improves the efficiency of drilling.

[0015] Second, when the reaming drill bit vibrates during operation, the utility model transmits the vibration force to the buffer spring through the drill rod, and the buffer spring undergoes elastic deformation to absorb the vibration force. When the vibration is large, the drill rod will move upward, and the buffer block will press the outer wall of the drill rod, causing the buffer block to undergo elastic deformation to absorb the vibration, thereby achieving the effect of reducing the vibration generated during the reaming operation during use, thereby protecting the drill bit when in use and avoiding excessive vibration that affects the reaming accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 For the utility model Figure 1 A schematic diagram of the structure at point A;

[0018] Figure 3 It is a schematic diagram of the overall cross-sectional structure of the utility model;

[0019] Figure 4 For the utility model Figure 3 Enlarged schematic diagram of the structure at point B.

[0020] Wherein: 1. Main structure; 101. Reaming drill bit; 102. Drill rod; 103. Mounting rod; 104. Guide drill bit; 105. Mounting groove; 106. Limiting slot; 107. Fixing groove; 108. Reset spring; 109. Fixing block; 110. Positioning groove; 2. Buffer structure; 201. Buffer seat; 202. Support block; 203. Buffer spring; 204. Buffer block. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] The utility model provides the following technical solutions:

[0023] Embodiment 1

[0024] See also Figure 1-4 , a combined guide reaming drill bit, comprising a main structure 1 and a buffer structure 2, wherein the buffer structure 2 is arranged on the top of the main structure 1;

[0025] The main structure 1 comprises a reaming drill bit 101 , a drill rod 102 is fixedly connected to the top of the reaming drill bit 101 , a mounting rod 103 is clamped inside the reaming drill bit 101 , and a guide drill bit 104 is fixedly connected to the bottom of the mounting rod 103 .

[0026] A mounting groove 105 is formed on the lower surface of the reaming drill bit 101 , and a limit slot 106 is connected to the top of the mounting groove 105 . The shapes and sizes of the mounting groove 105 and the limit slot 106 match those of the mounting rod 103 .

[0027] A fixing groove 107 is formed on the inner wall of the limiting slot 106 . A reset spring 108 is fixedly connected to the inner bottom wall of the fixing groove 107 . A fixing block 109 is fixedly connected to the top of the reset spring 108 . The top of the fixing block 109 is semicircular.

[0028] A positioning groove 110 is formed on the lower surface of the mounting rod 103 , and the shape and size of the positioning groove 110 match those of the fixing groove 107 .

[0029] One end of the drill rod 102 away from the reaming drill bit 101 is arranged inside the buffer seat 201 , and one end of the buffer spring 203 away from the support block 202 is fixedly connected to the outer wall of the drill rod 102 .

[0030] The positioning groove 110 on the mounting rod 103 is aligned with the fixing groove 107 on the limiting groove 106 by rotating the mounting rod 103 clockwise, and the return spring 108 exerts an outward force on the fixing block 109, so that the fixing block 109 is disengaged from the fixing groove 107 and snaps into the positioning groove 110, thereby completing the positioning and fixing of the mounting rod 103 and the installation of the guide drill bit 104. When the guide drill bit 104 needs to be removed and replaced, it is only necessary to rotate the guide drill bit 104 counterclockwise so that the fixing block 109 is squeezed and retracted into the fixing groove 107, and the positioning and fixing of the mounting rod 103 is released, and the guide drill bit 104 can be removed, which is convenient for disassembly and assembly of the guide drill bit 104 and improves the efficiency of drilling.

[0031] Embodiment 2

[0032] See also Figure 1-4 , and on the basis of the first embodiment, further obtained: a combined guide reaming drill bit, comprising a main structure 1 and a buffer structure 2, wherein the buffer structure 2 is arranged on the top of the main structure 1;

[0033] The main structure 1 comprises a reaming drill bit 101 , a drill rod 102 is fixedly connected to the top of the reaming drill bit 101 , a mounting rod 103 is clamped inside the reaming drill bit 101 , and a guide drill bit 104 is fixedly connected to the bottom of the mounting rod 103 .

[0034] The buffer structure 2 includes a buffer seat 201 , a support block 202 is fixedly connected to the inner bottom wall of the buffer seat 201 , and a buffer spring 203 is fixedly connected to the top of the support block 202 .

[0035] One end of the drill rod 102 away from the reaming drill bit 101 is arranged inside the buffer seat 201 , and one end of the buffer spring 203 away from the support block 202 is fixedly connected to the outer wall of the drill rod 102 .

[0036] Buffer blocks 204 are disposed on both sides of the support block 202 , and the buffer blocks 204 are higher than the support block 202 .

[0037] Through the above technical solution, when the reaming drill bit 101 vibrates during operation, the vibration force will be transmitted to the buffer spring 203 through the drill rod 102, and the buffer spring 203 will undergo elastic deformation to absorb the vibration force. When the vibration is large, the drill rod 102 will move upward, and the buffer block 204 will press the outer wall of the drill rod 102, so that the buffer block 204 will undergo elastic deformation to absorb the vibration, thereby achieving the effect of reducing the vibration generated during the reaming operation during use, thereby protecting the drill bit when in use and avoiding excessive vibration that affects the reaming accuracy.

[0038] During use: by inserting the mounting rod 103 into the mounting groove 105 at the bottom of the reaming drill bit 101, the mounting rod 103 is pushed into the limiting groove 106, and by rotating the mounting rod 103 clockwise, the positioning groove 110 on the mounting rod 103 is aligned with the fixing groove 107 on the limiting groove 106, and the return spring 108 gives the fixing block 109 an outward force, so that the fixing block 109 is disengaged from the fixing groove 107 and snaps into the positioning groove 110, thereby completing the limiting fixation of the mounting rod 103 and the installation of the guide drill bit 104. When the guide drill bit 104 needs to be removed and replaced, it is only necessary to rotate the guide drill bit 104 counterclockwise so that the fixing block 109 is squeezed and retracted into the fixing groove 107, thereby releasing the limiting fixation of the mounting rod 103 and removing the guide drill bit 104.

[0039] Although specific embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these specific embodiments without departing from the principles and spirit thereof, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A combined guide reaming drill bit, comprising a main structure (1) and a buffer structure (2), characterized in that: A buffer structure (2) is provided on the top of the main structure (1); The main structure (1) comprises a reaming drill bit (101), the top of which is fixedly connected to a drill rod (102), a mounting rod (103) is clamped inside the reaming drill bit (101), and the bottom of the mounting rod (103) is fixedly connected to a guide drill bit (104).

2. A combined guide reaming drill bit according to claim 1, characterized in that: The lower surface of the reaming drill bit (101) is provided with a mounting groove (105), and the upper part of the mounting groove (105) is connected to a limiting clamping groove (106), and the shapes and sizes of the mounting groove (105) and the limiting clamping groove (106) are adapted to the mounting rod (103).

3. A combined guide reaming drill bit according to claim 2, characterized in that: The inner wall of the limiting slot (106) is provided with a fixing groove (107), the inner bottom wall of the fixing groove (107) is fixedly connected with a reset spring (108), the top of the reset spring (108) is fixedly connected with a fixing block (109), and the top of the fixing block (109) is semicircular.

4. A combined guide reaming drill bit according to claim 1, characterized in that: A positioning groove (110) is provided on the lower surface of the installation rod (103), and the shape and size of the positioning groove (110) are compatible with the fixing groove (107).

5. The combined guide reaming drill bit according to claim 1, characterized in that: The buffer structure (2) comprises a buffer seat (201), the inner bottom wall of the buffer seat (201) is fixedly connected to a support block (202), and the top of the support block (202) is fixedly connected to a buffer spring (203).

6. A combined guide reaming drill bit according to claim 5, characterized in that: One end of the drill rod (102) away from the reaming drill bit (101) is arranged inside the buffer seat (201), and one end of the buffer spring (203) away from the support block (202) is fixedly connected to the outer wall of the drill rod (102).

7. A combined guide reaming drill bit according to claim 5, characterized in that: Buffer blocks (204) are arranged on both sides of the support block (202), and the buffer blocks (204) are higher than the support block (202).

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