Diamond drilling tool with fixed buffer mechanism

Abstract

The present invention relates to the field of mine operation, and specifically to a diamond drill with a fixed buffer mechanism. It includes a drill rod and a drill bit coaxially arranged with the drill rod, and also includes: a rotating shaft, which is fixedly connected to one end of the drill rod close to the drill bit; a rotating disk, which is fixedly connected to one end of the drill bit close to the drill rod; a clamping shaft, which is coaxially keyed with the rotating disk; an input shaft of a magnetic coupler is fixedly connected to the rotating shaft, and an output shaft is fixedly connected to the clamping shaft; an adjustable buffer mechanism, which is arranged on the side of the rotating shaft close to the rotating disk, and includes a tension adjustment mechanism and a plurality of buffer tension springs, the tension adjustment mechanism is connected to one end of the rotating shaft away from the drill bit, the tension adjustment mechanism is connected to the input shaft of the magnetic coupler by transmission, and a plurality of buffer tension springs are arranged at equal angles along the circumferential direction of the rotating disk, and the tension of the plurality of buffer tension springs is adjusted when the tension adjustment mechanism is in operation; a reset mechanism, which is arranged on one end of the rotating disk close to the rotating shaft, the reset mechanism is connected to the tension adjustment mechanism by transmission, and drives the magnetic coupler to reset when the drill bit is separated from the ore.

Description

Technical Field

[0001] The invention relates to the field of mine operations, and in particular to a diamond drill tool with a fixed buffer mechanism. Background Art

[0002] During drilling operations, the drill bit gradually penetrates into the rock under the action of drilling pressure, and at the same time rotates with the help of the torque transmitted by the drill string to shear and break the rock. However, when facing hard formations or the drill bit cuts too deep, if the torque generated by the cutting blade is not enough to cope with the resistance of the rock, the drill bit will temporarily stop rotating, while the power mechanism on the ground continues to rotate, resulting in a speed difference between the upper and lower parts of the drill string. Due to the rigidity of the drill pipe material, this difference causes torque energy to gradually accumulate inside the drill pipe. When the accumulated torque energy exceeds the drill bit's rock breaking requirements, it will suddenly release, pushing the drill bit to rotate at high speed to break the rock. But then, as the drill string speed drops below the critical value affected by static friction, the rotation stops again. This process is repeated cyclically, lasting between 1 and 40 seconds, and is called stick-slip vibration.

[0003] During the stick-slip vibration process, the drill bit's movement is mainly manifested as sudden movement in the axial direction. When the drill bit suddenly breaks the rock and rotates at high speed, the drill bit may move forward (that is, deep into the formation) for a certain distance due to the sudden release of torque and the breaking of the rock. When the drill bit stops rotating, the drill bit may retreat slightly or remain in place due to the effect of static friction. This periodic movement not only affects the accuracy and stability of drilling, but may also cause damage to drilling equipment and formations.

[0004] Because the timing of torque release and rock breaking is not exactly the same during the construction process, the traditional axial fixed vibration reduction structure cannot fully absorb and adapt to the huge energy fluctuations generated by the drill string during the stick-slip vibration process. And because stick-slip vibration involves a sharp change in torque, the traditional vibration reduction design may not be able to effectively isolate this high-frequency, large-amplitude vibration, causing the vibration energy to be transmitted to other parts of the drilling system, affecting the overall stability and safety. Summary of the invention

[0005] Based on this, it is necessary to provide a diamond drill with a fixed buffer mechanism to solve the existing technical problems.

[0006] In order to solve the problems of the prior art, the technical solution adopted by the present invention is:

[0007] A diamond drilling tool with a fixed buffer mechanism comprises a drill rod and a drill bit coaxially arranged with the drill rod, and further comprises:

[0008] A rotating shaft is fixedly connected to an end of the drill rod close to the drill bit;

[0009] A turntable is fixedly connected to the end of the drill bit close to the drill rod;

[0010] The clamping shaft is connected with the rotating disk coaxially with a key;

[0011] A magnetic coupler is arranged at one end of the rotating disk close to the rotating shaft, the input shaft of the magnetic coupler is fixedly connected to the rotating shaft, and the output shaft is fixedly connected to the clamping shaft;

[0012] The buffer adjustable mechanism is arranged on the side of the rotating shaft close to the rotating disk, and includes a tension adjustment mechanism and a plurality of buffer tension springs. The tension adjustment mechanism is connected to the end of the rotating shaft away from the drill bit, and the tension adjustment mechanism is drivingly connected to the input shaft of the magnetic coupler. The plurality of buffer tension springs are arranged at equal angles along the circumferential direction of the rotating disk. The tension of the buffer tension springs is adjusted when the tension adjustment mechanism is in operation.

[0013] The reset mechanism is arranged at one end of the rotating disk close to the rotating shaft. The reset mechanism is transmission-connected with the tension adjustment mechanism and drives the magnetic coupler to reset when the drill bit is separated from the ore.

[0014] Furthermore, the buffer adjustable mechanism includes an outer cover, a corrugated cover and an inner cover, the outer cover is fixedly connected to the rotating shaft coaxially, the inner cover is fixedly connected to the turntable coaxially, the outer cover is keyed to one end of the inner cover that is close to the inner cover, the corrugated cover coaxial line is sleeved on the outside of the inner cover, one end of the corrugated cover is fixedly connected to the inner cover, and the other end is fixedly connected to the outer cover.

[0015] Furthermore, the buffer adjustable mechanism includes a shell, an arc-shaped rack, a driving gear and a gear seat. The shell is coaxially sleeved on the outside of the magnetic coupler. The upper end of the shell is fixedly connected to the rotating shaft, and the lower end is fixedly connected to the clamping shaft. An avoidance hole is formed on the upper part of the shell. The arc-shaped rack is slidably connected to the avoidance hole and is fixedly connected to the input shaft of the magnetic coupler. The driving gear is rotatably arranged above the turntable through the gear seat and meshes with the arc-shaped rack.

[0016] Furthermore, the buffer adjustable mechanism also includes a driving sleeve, a driving pin, a driven gear and a driven gear ring. The driving sleeve is fixedly connected to the driving gear coaxially, the driving pin is keyed coaxially to the driving sleeve, the driven gear is fixedly connected to the upper end of the driving pin coaxially, and the driven gear ring is rotatably arranged coaxially with the rotating shaft and meshes with the driven gear.

[0017] Furthermore, the adjustable buffer mechanism also includes a washer, a washer ring, a plurality of buffer pins and a plurality of buffer sleeves. The washer is coaxially rotatably connected to the rotating shaft, the driven gear ring is coaxially rotatably connected to the lower end of the washer, the washer ring is coaxially arranged below the washer, the washer ring is key-connected to the buffer pin, the upper ends of the plurality of buffer pins are fixedly connected to the lower end of the washer, a plurality of buffer tension springs are respectively coaxially arranged with the plurality of buffer pins, a plurality of buffer sleeves are respectively key-connected with the plurality of buffer pins, the upper end of the buffer tension spring is fixedly connected to the washer ring, and the lower end is fixedly connected to the buffer sleeve.

[0018] Furthermore, the tension adjustment mechanism includes a traction gear, a traction screw, a traction screw sleeve, a traction seat, two limit shafts and two limit sleeves. The traction gear is rotatably connected to the lower end of the pad and meshes with the driven gear ring. The upper end of the traction screw is fixedly connected to the traction gear coaxially. The traction screw sleeve is threadedly connected to the traction screw. The traction seat is fixedly connected to the lower end of the traction screw sleeve and to the upper end of the pad ring. The two limit sleeves are symmetrically arranged at both ends of the traction screw sleeve and fixedly connected to the traction seat. The two limit shafts are respectively connected to the two limit sleeve keys, and the upper ends of the two limit shafts are respectively fixedly connected to the pad.

[0019] Furthermore, the reset mechanism includes two reset gears, two reset racks, two limit slide rails, four positioning plates, two movable plates, two positioning pins and two reset tension springs. The two reset gears are rotatably arranged at the upper end of the turntable, a reset gear is coaxially fixedly connected to the driving gear and rotatably connected to the lower end of the gear seat, the two limit slide rails are respectively arranged on the sides of the two reset gears and are fixedly connected to the turntable, the two reset racks are respectively slidably connected to the two limit slide rails, each of the two end of the limit slide rail is respectively fixedly connected to a positioning plate, the two positioning pins are respectively arranged above the two reset racks, the two ends of the positioning pins are respectively fixedly connected to the corresponding two positioning plates, the two movable plates are respectively fixedly connected to the upper ends of the two reset racks, and the two reset tension springs are respectively sleeved on the outside of the two positioning pins, one end of the reset tension spring is fixedly connected to the positioning plate, and the other end is fixedly connected to the movable plate.

[0020] Furthermore, the reset mechanism also includes a connecting gear ring and two connecting gears. The connecting gear ring is coaxially rotatably connected to the inner wall of the turntable. The two connecting gears are respectively rotatably arranged on the inner edge of the connecting gear ring. The two connecting gears are meshed with the connecting gear ring and are respectively coaxially fixed to the corresponding reset gears.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] First, the device transmits power by setting a magnetic coupler between the drill rod and the drill bit. The magnetic coupler can reduce the instantaneous mechanical impact when the drill bit starts and stops drilling, buffer the instantaneous impact force during the operation, and make the power transmission more stable.

[0023] Second: This device adjusts the tension of several buffer springs by setting a tension adjustment mechanism to ensure that when the drill bit moves forward (i.e., deep into the formation) for a certain distance due to the sudden release of torque and the breaking of rocks, the tension generated by the buffer springs can buffer this displacement and drive the drill bit to reset, thereby preventing the drill bit from causing a sharp change in torque due to vibration;

[0024] Thirdly, the device sets a reset mechanism to ensure that each time the drill bit stops rotating, the input shaft and the output shaft of the magnetic coupler will reset, so as to provide periodic buffer protection for the operation of the drill bit and prevent the drill bit from being damaged during repeated stick-slip vibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a truncated view of the three-dimensional structure of the embodiment;

[0026] Figure 2 Schematic diagram of the three-dimensional structure of the drill bit, the rotating shaft and the buffer adjustable mechanism in the embodiment;

[0027] Figure 3 1 is a schematic diagram of the exploded three-dimensional structure of the drill bit, the rotating shaft and the buffer adjustable mechanism in the embodiment;

[0028] Figure 4 is a schematic diagram of the three-dimensional structure of the adjustable buffer mechanism in another angle in the embodiment;

[0029] Figure 5 yes Figure 4 A magnified view of the structure at center;

[0030] Figure 6 yes Figure 4 A magnified view of the structure at B in the middle;

[0031] Figure 7 is a half-section view of the three-dimensional structure of an embodiment;

[0032] Figure 8 yes Figure 7 A magnified view of the structure at C in the middle;

[0033] Fig. 9 Schematic diagram of the three-dimensional structure of the reset mechanism in the embodiment;

[0034] Fig.10 It is a three-dimensional structural schematic diagram of the reset mechanism in the embodiment from another angle.

[0035] The numbers in the figure are: 1, drill rod; 2, rotating shaft; 3, outer cover; 4, corrugated cover; 5, inner cover; 6, turntable; 7, clamping shaft; 8, drill bit; 9, magnetic coupler; 10, input shaft; 11, output shaft; 12, buffer adjustable mechanism; 13, housing; 14, avoidance hole; 15, arc-shaped rack; 16, driving gear; 17, gear seat; 18, driving shaft sleeve; 19, driving pin shaft; 20, driven gear; 21, driven gear ring; 22, pad; 23, pad ring ; 24. Buffer pin shaft; 25. Buffer tension spring; 26. Buffer shaft sleeve; 27. Tension adjustment mechanism; 28. Traction gear; 29. ​​Traction screw; 30. Traction screw sleeve; 31. Traction seat; 32. Limit shaft; 33. Limit sleeve; 34. Reset mechanism; 35. Reset gear; 36. Reset rack; 37. Limit slide rail; 38. Positioning plate; 39. Movable plate; 40. Positioning pin; 41. Reset tension spring; 42. Connecting gear; 43. Connecting gear ring. DETAILED DESCRIPTION

[0036] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0037] refer to Figures 1 to 10 A diamond drilling tool with a fixed buffer mechanism comprises a drill rod 1 and a drill bit 8 arranged coaxially with the drill rod 1, and further comprises:

[0038] The rotating shaft 2 is fixedly connected to one end of the drill rod 1 close to the drill bit 8;

[0039] The turntable 6 is fixedly connected to the end of the drill bit 8 close to the drill rod 1;

[0040] Card shaft 7 (such as Figure 7 As shown), connected with the rotating disk 6 coaxially with the key;

[0041] A magnetic coupler 9 is arranged at one end of the turntable 6 close to the rotating shaft 2, an input shaft 10 of the magnetic coupler 9 is fixedly connected to the rotating shaft 2, and an output shaft 11 is fixedly connected to the clamping shaft 7;

[0042] The buffer adjustable mechanism 12 is arranged on the side of the rotating shaft 2 close to the rotating disk 6, and includes a tension adjustment mechanism 27 and a plurality of buffer tension springs 25 (such as Figure 7 As shown in FIG. 1 ), the tension adjustment mechanism 27 is connected to the end of the rotating shaft 2 away from the drill bit 8, the tension adjustment mechanism 27 is connected to the input shaft 10 of the magnetic coupler 9, and a plurality of buffer tension springs 25 are arranged at equal angles along the circumferential direction of the rotating disk 6 (as shown in FIG. 1 ). Figure 7 As shown), the tension adjustment mechanism 27 adjusts the tension of the buffer tension spring 25 during operation;

[0043] Reset mechanism 34 (such as Figure 3As shown), it is arranged at one end of the turntable 6 close to the rotating shaft 2, and the reset mechanism 34 is transmission-connected with the tension adjustment mechanism 27 and drives the magnetic coupler 9 to reset when the drill bit 8 is separated from the ore.

[0044] When the device is in operation, when the drill rod 1 is started, it will drive the drill bit 8 to rotate through the rotating shaft 2, the magnetic coupler 9, the clamping shaft 7 and the turntable 6 in sequence (the magnetic coupler 9 here is a mining magnetic coupler, which is a mature prior art. Its specific working principle and structure are not described in detail here. Its specific structure refers to a composite magnetic coupler for coal mines described in the Chinese patent application number CN202010161549.4). When the drill bit 8 collides with the ore and stops rotating, for the magnetic coupler 9, when the output shaft 11 is subjected to excessive resistance, the input shaft 10 will continue to rotate, but due to the existence of attraction, the magnetic coupler 9 will feel a certain load increase, which may cause the speed to drop slightly, and the torque transmitted will increase in an attempt to overcome the resistance of the output shaft 11, which is used to crush the ore. Because the harder the ore, the longer the drill bit 8 is stagnant, the greater the energy of the accumulated torque, so the subsequent vibration amplitude is greater, and the buffer tension provided by the required buffer spring 25 is stronger.

[0045] During this process, the rotation of the input shaft 10 of the magnetic coupler 9 will increase the tension of several buffer springs 25 through the tension adjustment mechanism 27, so as to facilitate real-time adjustment of the vibration generated by the subsequent drill bit 8, and the reset mechanism 34 is used to reset the misaligned output shaft 11 and input shaft 10 of the magnetic coupler 9.

[0046] In order to prevent the buffer adjustable mechanism 12 from colliding with the ore during operation, the following features are also specifically provided:

[0047] The buffer adjustable mechanism 12 includes an outer cover 3, a corrugated cover 4 and an inner cover 5. The outer cover 3 is coaxially fixedly connected to the rotating shaft 2, the inner cover 5 is coaxially fixedly connected to the rotating disk 6, the outer cover 3 is keyed to one end close to the inner cover 5, the corrugated cover 4 is coaxially sleeved on the outside of the inner cover 5, one end of the corrugated cover 4 is fixedly connected to the inner cover 5, and the other end is fixedly connected to the outer cover 3. When the drill bit 8 is working, when the drill bit 8 moves, the inner cover 5 and the outer cover 3 are relatively displaced, and the corrugated cover 4 will be deformed synchronously to prevent the crushed ore from colliding with other structures in the buffer adjustable mechanism 12.

[0048] In order to supplement the specific structure of the adjustable buffer mechanism 12, the following features are also specifically provided:

[0049] The buffer adjustable mechanism 12 includes a housing 13, an arc-shaped rack 15, a driving gear 16 and a gear seat 17. The housing 13 is coaxially sleeved on the outside of the magnetic coupler 9 (such as Figure 6As shown in the figure, the upper end of the housing 13 is fixedly connected to the rotating shaft 2, and the lower end is fixedly connected to the clamping shaft 7. An avoidance hole 14 is formed on the upper part of the housing 13. The arc-shaped rack 15 is slidably connected to the avoidance hole 14 and is fixedly connected to the input shaft 10 of the magnetic coupler 9. The driving gear 16 is rotatably arranged above the turntable 6 through the gear seat 17 and meshes with the arc-shaped rack 15. When the resistance of the drill bit 8 is too large and causes the input shaft 10 and the output shaft 11 of the magnetic coupler 9 to rotate relative to each other, the input shaft 10 of the magnetic coupler 9 will drive the arc-shaped rack 15 to move, and the arc-shaped rack 15 will drive the driving gear 16 to rotate after moving.

[0050] In order to further supplement the specific structure of the adjustable buffer mechanism 12, the following features are also specifically provided:

[0051] The buffer adjustable mechanism 12 also includes a driving sleeve 18, a driving pin 19, a driven gear 20 and a driven ring gear 21. The driving sleeve 18 is fixedly connected to the driving gear 16 coaxially, the driving pin 19 is keyed coaxially with the driving sleeve 18, the driven gear 20 is fixedly connected to the upper end of the driving pin 19 coaxially, and the driven ring gear 21 is rotatably arranged coaxially with the rotating shaft 2 and meshes with the driven gear 20. When the driving gear 16 rotates, the driving gear 16 will drive the driving pin 19 to rotate through the driving sleeve 18, and after the driving pin 19 rotates, it will drive the driven ring gear 21 to rotate through the driven gear 20.

[0052] In order to further limit the buffer tension spring 25, the following features are specifically provided:

[0053] The buffer adjustable mechanism 12 also includes a pad 22, a pad ring 23, a plurality of buffer pins 24 and a plurality of buffer sleeves 26. The pad 22 is coaxially connected to the rotating shaft 2, the driven gear ring 21 is coaxially connected to the lower end of the pad 22, and the pad ring 23 is coaxially arranged below the pad 22 (such as Figure 4 As shown in the figure, the backing ring 23 is key-connected with the buffer pin 24, the upper ends of the buffer pins 24 are fixedly connected with the lower end of the pad 22, the buffer tension springs 25 are respectively coaxially arranged with the buffer pins 24, the buffer sleeves 26 are respectively coaxially key-connected with the buffer pins 24, the upper end of the buffer tension spring 25 is fixedly connected with the backing ring 23, and the lower end is fixedly connected with the buffer sleeve 26. When the buffer tension spring 25 is deformed, the buffer pin 24 and the buffer sleeve 26 slide relative to each other. When the drill bit 8 stops rotating, the turntable 6 is fixedly connected with the drill bit 8, the buffer sleeve 26 is fixedly connected with the turntable 6, the buffer pin 24 is key-connected with the buffer sleeve 26, and the upper end of the buffer pin 24 is fixedly connected with the pad 22. When the drill bit 8 stops rotating, the pad 22 also stops rotating. At this time, the pad 22 and the rotating shaft 2 rotate relative to each other.

[0054] In order to supplement the specific structure of the tension adjustment mechanism 27, the following features are also specifically provided:

[0055] The tension adjustment mechanism 27 includes a traction gear 28, a traction screw 29, a traction screw sleeve 30, a traction seat 31, two limit shafts 32 and two limit sleeves 33. The traction gear 28 is rotatably connected to the lower end of the pad 22 and meshes with the driven gear ring 21 (such as Figure 5 As shown in the figure, the upper end of the traction screw 29 is coaxially fixedly connected to the traction gear 28, the traction screw sleeve 30 is threadedly connected to the traction screw 29, the traction seat 31 is fixedly connected to the lower end of the traction screw sleeve 30 and to the upper end of the backing ring 23, two limit sleeves 33 are symmetrically arranged at both ends of the traction screw sleeve 30 and are fixedly connected to the traction seat 31, two limit shafts 32 are respectively key-connected with the two limit sleeves 33, and the upper ends of the two limit shafts 32 are respectively fixedly connected to the backing plate 22. When the driven gear ring 21 rotates, the driven gear ring 21 will drive the traction screw 29 to rotate through the traction gear 28, and when the traction screw 29 rotates, it will drive the traction screw sleeve 30 to move, and when the traction screw sleeve 30 moves, it will be limited by the limit shaft 32 and the limit sleeve 33, and the movement of the traction screw sleeve 30 will also drive the backing ring 23 to move through the traction seat 31.

[0056] In order to supplement the specific structure of the reset mechanism 34, the following features are also specifically provided:

[0057] The reset mechanism 34 includes two reset gears 35, two reset racks 36, two limit slide rails 37, four positioning plates 38, two movable plates 39, two positioning pins 40 and two reset tension springs 41. The two reset gears 35 are rotatably arranged at the upper end of the turntable 6, one reset gear 35 is coaxially fixedly connected to the driving gear 16 and is rotatably connected to the lower end of the gear seat 17, the two limit slide rails 37 are respectively arranged on the sides of the two reset gears 35 and are fixedly connected to the turntable 6, and the two reset racks 36 are respectively arranged on the sides of the two reset gears 35 and are fixedly connected to the turntable 6. It is slidably connected with the two limit rails 37, and each of the two ends of each limit rail 37 is fixedly connected with a positioning plate 38, two positioning pins 40 are respectively arranged above the two reset racks 36, and the two ends of the positioning pins 40 are respectively fixedly connected with the corresponding two positioning plates 38, and the two movable plates 39 are respectively fixedly connected with the upper ends of the two reset racks 36. Two reset tension springs 41 are respectively sleeved on the outside of the two positioning pins 40, and one end of the reset tension spring 41 is fixedly connected with the positioning plate 38, and the other end is fixedly connected with the movable plate 39. When the driving gear 16 rotates, the driving gear 16 will drive the reset gear 35 fixedly connected thereto to rotate, and then drive the movable plate 39 to move along the positioning pin 40 through the reset rack 36. When the movable plate 39 moves, it will drive the reset tension spring 41 to stretch and deform, so that when the resistance of the drill bit 8 disappears later, the reset tension spring 41 will drive the movable plate 39 to reset under the action of elastic deformation, and finally realize the reversal of the driving gear 16, thereby ensuring that the arc rack 15 returns to its initial position.

[0058] In order to drive the two reset gears 35 to rotate synchronously, the following features are also specifically provided:

[0059] The reset mechanism 34 also includes a connecting gear ring 43 and two connecting gears 42. The connecting gear ring 43 is coaxially connected to the inner wall of the rotating disk 6. The two connecting gears 42 are respectively rotatably arranged on the inner edge of the connecting gear ring 43. The two connecting gears 42 are meshed with the connecting gear ring 43 and are respectively coaxially fixedly connected to the corresponding reset gears 35. When the driving gear 16 drives the reset gear 35 fixedly connected thereto to rotate, the reset gear 35 will drive the connecting gear 42 fixedly connected thereto to rotate. After the connecting gear 42 rotates, it will drive the other connecting gear 42 to rotate through the connecting gear ring 43, and then the reset gear 35 fixedly connected to the other connecting gear 42 will rotate, thereby realizing the synchronous rotation of the two reset gears 35.

[0060] The working principle of the device is that when the device is in operation, the drill rod 1 starts to drive the drill bit 8 to rotate through the rotating shaft 2, the magnetic coupler 9, the clamping shaft 7 and the rotating disk 6 in sequence (see Figure 1 and Figure 7 , the magnetic coupler 9 here is a mining magnetic coupler, which is a mature existing technology, and its specific working principle and structure are not described in detail here). When the drill bit 8 collides with the ore and stops rotating, for the magnetic coupler 9, when the output shaft 11 is subjected to excessive resistance, the input shaft 10 will continue to rotate, but due to the existence of attraction, the output shaft 11 of the magnetic coupler 9 will feel a certain load increase, which may cause a slight decrease in the speed, but the torque transmitted by the input shaft 10 will increase in an attempt to overcome the resistance of the output shaft 11, which is used to crush the ore. Because the harder the ore, the longer the drill bit 8 is stagnant, the greater the energy of the accumulated torque, so the subsequent vibration amplitude is greater, and the buffer tension provided by the required buffer spring 25 is stronger. At this time, the tension of the buffer spring 25 is changed synchronously to buffer the vibration amplitude in real time.

[0061] The specific process is as follows: the rotation of the input shaft 10 of the magnetic coupler 9 will drive the driving gear 16 to rotate through the arc rack 15, and the driving gear 16 will drive the driven gear ring 21 to rotate after passing through the driving shaft sleeve 18, the driving pin shaft 19 and the driven gear 20 in sequence. When the driven gear ring 21 rotates, the driven gear ring 21 will drive the traction screw 29 to rotate through the traction gear 28. When the traction screw 29 rotates, it will drive the traction screw sleeve 30 to move. When the traction screw sleeve 30 moves, it will be limited by the limit shaft 32 and the limit sleeve 33, and the movement of the traction screw sleeve 30 will also drive the gasket 23 to move through the traction seat 31. After the backing ring 23 moves, it will cause the buffer tension spring 25 connected thereto to deform. After the deformation, the buffer tension spring 25 has a longer stroke, which increases its own tension. The buffer tension spring 25 with increased tension can buffer the displacement of the drill bit 8 forward (i.e., deep into the formation). Specifically, the greater the torque capacity accumulated by the drill bit 8, the greater the displacement of the drill bit 8, the greater the tension of the buffer tension spring 25, and the stronger the traction effect on the drill bit 8. During the construction process, because the timing of torque release and rock breaking is not exactly the same, during the movement of the arc rack 15, as long as the drill bit 8 moves, the buffer tension spring 25 can buffer and limit it to prevent it from causing a drastic change in torque during the vibration process.

[0062] After drilling is blocked, the buffer spring 25 will stretch to buffer the subsequent movement of the drill bit 8. When the drill bit 8 returns to the normal drilling resistance, the basic tension provided by the buffer spring 25 (that is, the tension provided by the basic stroke of the buffer spring 25 when the input shaft 10 and the output shaft 11 of the magnetic coupler 9 do not rotate relative to each other) can meet the micro-vibration generated by the drill bit 8. At this time, the magnetic coupler 9 can also reduce the instantaneous mechanical impact on the drill bit 8 during the start and stop of drilling, buffer the instantaneous impact force during the operation, and make the power transmission more stable.

[0063] In order to restore the deformed buffer tension spring 25, when the driving gear 16 rotates, the driving gear 16 will drive the reset gear 35 fixedly connected thereto to rotate, and then drive the movable plate 39 to move along the positioning pin 40 through the reset rack 36. When the movable plate 39 moves, it will drive the reset tension spring 41 to stretch and deform, so that when the resistance of the drill bit 8 disappears later, the reset tension spring 41 will drive the movable plate 39 to reset under the action of elastic deformation, and finally realize the reversal of the driving gear 16, thereby ensuring that the arc-shaped rack 15 is restored to its initial position, and the corresponding buffer tension springs 25 after deformation are restored to their original positions, so as to prepare for the subsequent buffering and vibration reduction process.

[0064] The above embodiments only express one or several implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the attached claims.

Claims

1. A diamond drill having a fixed buffer mechanism, comprising a drill rod (1) and a drill bit (8) arranged coaxially with the drill rod (1), characterized in that: Also includes: A rotating shaft (2) is fixedly connected to an end of the drill rod (1) close to the drill bit (8); A turntable (6) is fixedly connected to an end of the drill bit (8) close to the drill rod (1); The clamping shaft (7) is coaxially key-connected with the rotating disk (6); A magnetic coupler (9) is arranged at one end of the rotating disk (6) close to the rotating shaft (2); an input shaft (10) of the magnetic coupler (9) is fixedly connected to the rotating shaft (2), and an output shaft (11) is fixedly connected to the clamping shaft (7); The buffer adjustable mechanism (12) is arranged on a side of the rotating shaft (2) close to the rotating disk (6), and comprises a tension adjustment mechanism (27) and a plurality of buffer tension springs (25). The tension adjustment mechanism (27) is connected to an end of the rotating shaft (2) away from the drill bit (8). The tension adjustment mechanism (27) is drivingly connected to the input shaft (10) of the magnetic coupler (9). The plurality of buffer tension springs (25) are arranged at equal angles along the circumferential direction of the rotating disk (6). The tension of the buffer tension springs (25) is adjusted when the tension adjustment mechanism (27) is in operation. The reset mechanism (34) is arranged at one end of the rotating disk (6) close to the rotating shaft (2). The reset mechanism (34) is transmission-connected to the tension adjustment mechanism (27) and drives the magnetic coupler (9) to reset when the drill bit (8) is separated from the ore.

2. A diamond drill with a fixed buffer mechanism according to claim 1, characterized in that: The buffer adjustable mechanism (12) comprises an outer cover (3), a corrugated cover (4) and an inner cover (5); the outer cover (3) is coaxially fixedly connected to the rotating shaft (2); the inner cover (5) is coaxially fixedly connected to the rotating disk (6); one end of the outer cover (3) and the inner cover (5) close to each other is key-connected; the corrugated cover (4) is coaxially sleeved on the outside of the inner cover (5); one end of the corrugated cover (4) is coaxially fixedly connected to the inner cover (5); and the other end of the corrugated cover (4) is coaxially fixedly connected to the outer cover (3).

3. A diamond drill with a fixed buffer mechanism according to claim 1, characterized in that: The buffer adjustable mechanism (12) comprises a housing (13), an arc-shaped rack (15), a driving gear (16) and a gear seat (17). The housing (13) is coaxially sleeved on the outside of the magnetic coupler (9). The upper end of the housing (13) is fixedly connected to the rotating shaft (2), and the lower end is fixedly connected to the clamping shaft (7). An avoidance hole (14) is formed on the upper part of the housing (13). The arc-shaped rack (15) is slidably connected to the avoidance hole (14) and is fixedly connected to the input shaft (10) of the magnetic coupler (9). The driving gear (16) is rotatably arranged above the rotating disk (6) through the gear seat (17) and meshes with the arc-shaped rack (15).

4. A diamond drill with a fixed buffer mechanism according to claim 3, characterized in that: The adjustable buffer mechanism (12) further comprises a driving shaft sleeve (18), a driving pin shaft (19), a driven gear (20) and a driven gear ring (21); the driving shaft sleeve (18) is fixedly connected to the driving gear (16) coaxially; the driving pin shaft (19) is key-connected coaxially to the driving shaft sleeve (18); the driven gear (20) is fixedly connected coaxially to the upper end of the driving pin shaft (19); and the driven gear ring (21) is rotatably arranged coaxially with the rotating shaft (2) and meshes with the driven gear (20).

5. A diamond drill with a fixed buffer mechanism according to claim 4, characterized in that: The buffer adjustable mechanism (12) further comprises a pad (22), a pad ring (23), a plurality of buffer pins (24) and a plurality of buffer sleeves (26); the pad (22) is coaxially connected to the rotating shaft (2); the driven gear ring (21) is coaxially connected to the lower end of the pad (22); the pad ring (23) is coaxially arranged below the pad (22); the pad ring (23) is key-connected to the buffer pin (24); the upper ends of the plurality of buffer pins (24) are fixedly connected to the lower end of the pad (22); the plurality of buffer tension springs (25) are respectively coaxially arranged with the plurality of buffer pins (24); the plurality of buffer sleeves (26) are respectively coaxially connected with the plurality of buffer pins (24); the upper end of the buffer tension spring (25) is fixedly connected to the pad ring (23); and the lower end is fixedly connected to the buffer sleeve (26).

6. A diamond drill with a fixed buffer mechanism according to claim 5, characterized in that: The pulling force adjustment mechanism (27) comprises a traction gear (28), a traction screw (29), a traction screw sleeve (30), a traction seat (31), two limiting shafts (32) and two limiting sleeves (33); the traction gear (28) is rotatably connected to the lower end of the pad (22) and meshes with the driven gear ring (21); the upper end of the traction screw (29) is coaxially fixedly connected to the traction gear (28); the traction screw sleeve (30) is threadedly connected to the traction screw (29); the traction seat (31) is fixedly connected to the lower end of the traction screw sleeve (30) and to the upper end of the pad ring (23); the two limiting sleeves (33) are symmetrically arranged at both ends of the traction screw sleeve (30) and are fixedly connected to the traction seat (31); the two limiting shafts (32) are respectively key-connected to the two limiting sleeves (33); and the upper ends of the two limiting shafts (32) are respectively fixedly connected to the pad (22).

7. A diamond drill with a fixed buffer mechanism according to claim 6, characterized in that: The reset mechanism (34) comprises two reset gears (35), two reset racks (36), two limit slide rails (37), four positioning plates (38), two movable plates (39), two positioning pins (40) and two reset tension springs (41). The two reset gears (35) are rotatably arranged at the upper end of the rotating disk (6). One reset gear (35) is coaxially fixedly connected to the driving gear (16) and is rotatably connected to the lower end of the gear seat (17). The two limit slide rails (37) are respectively arranged on the sides of the two reset gears (35) and are fixedly connected to the rotating disk (6). The two reset racks (36) are ) are respectively slidably connected to the two limit slide rails (37), each limit slide rail (37) is respectively fixedly connected to a positioning plate (38) at both ends, two positioning pins (40) are respectively arranged above the two reset racks (36), the two ends of the positioning pins (40) are respectively fixedly connected to the corresponding two positioning plates (38), the two movable plates (39) are respectively fixedly connected to the upper ends of the two reset racks (36), and the two reset tension springs (41) are respectively sleeved on the outside of the two positioning pins (40), one end of the reset tension spring (41) is fixedly connected to the positioning plate (38), and the other end is fixedly connected to the movable plate (39).

8. A diamond drill with a fixed buffer mechanism according to claim 7, characterized in that: The reset mechanism (34) further comprises a connecting gear ring (43) and two connecting gears (42); the connecting gear ring (43) is coaxially rotatably connected to the inner wall of the rotating disk (6); the two connecting gears (42) are rotatably arranged on the inner edge of the connecting gear ring (43); the two connecting gears (42) are meshed with the connecting gear ring (43) and are coaxially fixedly connected to the corresponding reset gears (35).

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