Quick-release connector type drilling machine power head

Abstract

The utility model relates to the technical field of coal mine drilling machines, and discloses a quick-release connector type drilling machine power head which comprises a gearbox, a main shaft, a connecting shaft and a water braid, the main shaft is arranged in the gearbox, the connecting shaft is arranged in the main shaft, the water braid is arranged at the rear end of the gearbox, a mandrel of the water braid is connected with the tail end of the connecting shaft, and a driving drill rod is arranged at the front end of the connecting shaft. The driving drill rod comprises a rod body and a connector, female connectors are arranged at the two ends of the rod body, male connectors are arranged at the two ends of the connector, the male connectors can be in threaded connection with the female connectors and the drill rod, a front end cover is arranged at the end, away from the water braid, of the main shaft, the inner wall of the front end cover is clamped with the rod body, and the maximum diameter of the driving drill rod is smaller than the minimum diameter in the main shaft. The male joints are arranged at the two ends of the driving drill rod joint, when the male joint in butt joint with the drill rod is damaged, the joint can be replaced to enable the male joint at the other end to be in butt joint with the drill rod, and therefore the service life of the driving drill rod is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mine drilling rigs, in particular to a quick-release joint type drilling rig power head. Background Art

[0002] The active drill rod is an important part of the drilling rig power head that connects the drill rod. The power head transmits rotation and translation motion to the drill rod through the active drill rod, thereby realizing the transmission of drilling power and the connection and disconnection of the drill rod.

[0003] The existing patent (publication number: CN201062492Y) discloses a quick-release joint type drilling rig power head mining equipment, which includes a rod body, a drill rod upper joint, a drill rod lower joint and a drill rod connector. The drill rod upper joint and the drill rod lower joint are fixedly connected to the two ends of the rod body respectively, and the end of the drill rod connector is provided with an external thread, and the end of the drill rod upper joint is provided with an internal thread. The drill rod connector and the drill rod upper joint are connected by threads; the end of the drill rod lower joint is also provided with an internal thread; after a certain wear occurs on the lower part of the drill rod, the connecting thread between the drill rod connector and the drill rod connector can be opened, and the drill rod can be replaced 180°, and the worn section of the drill rod is replaced on the upper side, and the unworn section of the drill rod is replaced on the lower side, thereby ensuring the continued use of the drill rod. The utility model has the characteristics of reasonable structure, the drill rod can be used in two directions, extended service life, improved utilization rate, reduced production cost, etc.

[0004] During the drilling and retracting process, the active drill rod needs to be connected and disconnected with each drill rod installed in or removed from the drilling rig. The frequency of use of its threaded joint is dozens or even hundreds of times that of ordinary drill rod joints. It is easy to wear during the use of the drilling rig, and the active drill rod needs to be replaced frequently. The existing active drilling rigs generally disassemble and assemble the active drill rod from the front end of the gearbox. Since the space from the front end of the chuck to the clamp is very limited and is generally located in the middle of the drilling rig, it is inconvenient to pull out the active drill rod and the connecting shaft. In addition, the active drill rod is a wearing part and needs to be replaced frequently, which seriously affects the construction efficiency. For this reason, we proposed a quick-release joint type drilling rig power head to solve the above problems. Utility Model Content

[0005] The utility model aims to provide a quick-release joint type drilling rig power head to solve the problem that the active drill rod is easy to wear, resulting in the need to frequently replace the active drill rod. Since the active drill rod is located in the middle of the drilling rig, it is inconvenient to replace it, which seriously affects the construction efficiency.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a quick-release joint type drilling rig power head, including a gearbox, a main shaft, a connecting shaft and a water braid, the main shaft is arranged inside the gearbox, the connecting shaft is arranged inside the main shaft, the water braid is arranged at the rear end of the gearbox, the core shaft of the water braid is connected to the end of the connecting shaft, and an active drill rod is arranged at the front end of the connecting shaft. The active drill rod includes a rod body and a joint, both ends of the rod body are arranged as female joints, and both ends of the joint are arranged as male joints. The male joint can be threadedly connected with the female joint and the drill rod, and a front end cover is provided at the end of the main shaft away from the water braid, and the inner wall of the front end cover is clamped with the rod body, and the maximum diameter of the active drill rod is smaller than the minimum diameter inside the main shaft.

[0007] The beneficial effects of this program are:

[0008] In a directional drilling rig power head disclosed in an existing patent (publication number: CN116905958A), when the active drill rod needs to be replaced, the staff needs to remove the front end cover first, and then unlock the active drill rod. Since one end of the connecting shaft is threadedly connected to the active drill rod, and the other end is threadedly connected to the core shaft of the water braid, when the staff rotates the active drill rod to unlock it, the active drill rod and the connecting shaft cannot be accurately unlocked, and it is possible that the connecting shaft and the core shaft of the water braid are unlocked. Since the space from the front end of the chuck to the clamp is very limited, in the narrow operating space, even taking out the active drill rod alone will bring difficulty to the staff's operation. If the connecting shaft and the core shaft of the water braid are to be unlocked, the staff wants to unlock it from the front. If the connecting shaft is unlocked from the core shaft of the water braid, the staff also needs to take out the active drill rod and the connecting shaft from the front end of the gearbox together before loading the salvaged drill rod into the chuck and switching to the chuck clamping for work. Therefore, whether it is to replace the active drill rod or to switch the chuck clamping to salvage the drill rod for work, it is very difficult in the prior art, which seriously affects the construction efficiency.

[0009] In the present solution, the active drill rod is configured as a detachable rod body and joint, and both ends of the joint are configured as male joints, both of which can be threadedly connected to the female joint of the rod body. Therefore, when the male joint that connects the joint with the drill rod is damaged, the joint can be replaced, and the damaged male joint can be threadedly connected to the female joint of the rod body, so that the male joint that was previously threadedly connected to the female joint of the rod body can be connected to the drill rod, thereby extending the service life of the active drill rod. In addition, this operation does not require the active drill rod to be removed, so that the joint can be quickly replaced, thereby improving construction efficiency. When it is necessary to switch to the chuck to clamp the salvage drill rod or the drill rod with different outer diameters for work, the staff only needs to loosen the chuck, pull out the active drill rod, the connecting shaft and the water braid from the rear end of the gearbox, and then insert the salvage drill rod or the drill rod with different outer diameters into the main shaft from the rear end of the gearbox, and place the salvage drill rod or the drill rod with different outer diameters in the clamping range of the chuck, and then start the chuck to clamp the salvage drill rod or the drill rod with different outer diameters for work, thereby quickly completing the replacement of the active drill rod and increasing construction efficiency.

[0010] Preferably, as an improvement, the front end cover includes a fixed disk and an outer sleeve, the fixed disk is arranged at the end of the chuck away from the water braid, the outer sleeve is arranged in the middle of the fixed disk, and the inner wall of the outer sleeve is arranged to be a polygon, the outer wall of the rod body is provided with a stop block, and the stop block is clamped with the inner wall of the outer sleeve.

[0011] The beneficial effect is that the stop block on the outer wall of the rod body is clamped with the inner wall of the outer sleeve, so that the active drill rod and the front end cover remain relatively still, so that when the main shaft drives the front end cover to rotate, the active drill rod clamped with the outer sleeve rotates.

[0012] Preferably, as an improvement, a rear end cover is provided at the end of the main shaft close to the water braid, and the rear end cover includes an integrally formed connecting sleeve and an inner ring. The connecting sleeve is provided at the end of the main shaft close to the water braid, the inner ring is located in the middle of the connecting sleeve, and the core shaft of the water braid rotates through the inner ring and is connected to the connecting shaft.

[0013] The beneficial effect is that the end of the connecting sleeve close to the main shaft extends into the inside of the main shaft to prevent the connecting shaft from shaking too much when rotating and hitting the inner wall of the main shaft, thereby causing damage to the inner wall of the main shaft. The inner ring is used to reduce the shaking of the core shaft of the water braid when rotating, and increase the stability of the water braid when working.

[0014] Preferably, as an improvement, a chuck is provided between the main shaft and the front end cover, and the chuck can axially limit the active drill rod.

[0015] The beneficial effect is that when it is necessary to temporarily replace the drill rod or salvage drill rod with a different outer diameter for work, the staff will remove the water braid, the connecting shaft and the active drill rod connection as a whole from the main shaft, and then pass the replaced drill rod or salvage drill rod through the main shaft, chuck and front end cover from the rear end of the gearbox at one time. At this time, by starting the chuck, the chuck temporarily clamps the replaced drill rod or salvage drill rod, so as to quickly carry out construction according to different working conditions and increase construction efficiency.

[0016] Preferably, as an improvement, the rod body is provided with a limiting section, and the limiting section is located between the chucks, the outer diameter of the female connector and the distance between the opposite sides of the stop block are both larger than the minimum diameter after the chucks are clamped, and the diameter of the limiting section is smaller than the minimum diameter after the chucks are clamped.

[0017] The beneficial effects are as follows: the limiting section is located between the female joint and the stop block, and the active drill rod is axially limited by making the outer diameter of the female joint and the distance between the opposite sides of the stop block larger than the minimum diameter after the chuck is clamped, thereby preventing the active drill rod from having a large axial displacement during loading and unloading, thereby preventing axial impact. At the same time, since the diameter of the limiting section is smaller than the minimum diameter after the chuck is clamped, the clamping force of the chuck will not directly act on the active drill rod, thereby avoiding the active drill rod from directly bearing the strong clamping force of the chuck and increasing the service life of the active drill rod.

[0018] Preferably, as an improvement, the length of the limiting section is greater than the clamping width of the chuck, so that the limiting section has a certain axial float in the chuck.

[0019] The beneficial effect is that the length of the limit section is greater than the clamping width of the chuck, so that the active drill rod has a certain floating distance in the chuck, so as to alleviate the axial impact generated when the active drill rod is connected or disconnected with the drill rod, thereby protecting the active drill rod.

[0020] Preferably, as an improvement, the outer diameter of the female connector and the diagonal distance of the stop block are both smaller than the diameter of the chuck after it is loosened.

[0021] The beneficial effect is: ensuring that the active drill rod can be taken out from the loosened chuck.

[0022] Preferably, as an improvement, an inner sleeve is provided at one end of the fixed disk close to the chuck, the inner sleeve is provided at the end of the chuck away from the water braid, the inner sleeve is configured as a polygon, and the inner wall of the inner sleeve is congruent with and connected to the inner wall of the outer sleeve.

[0023] The beneficial effects are: by providing the inner sleeve, the clamping length of the active drill rod is extended, the stability of the active drill rod during rotation is increased, and at the same time the contact area with the active drill rod is increased, so that the force per unit area acting on the active drill rod is reduced, thereby extending the service life of the active drill rod.

[0024] Preferably, as an improvement, a gap is provided between the inner ring and the connecting shaft.

[0025] The beneficial effect is that by setting a gap between the rear end cover and the connecting shaft, the active drill rod, the connecting shaft and the core shaft of the water braid can have a certain axial floating space as a whole, thereby further alleviating the axial impact generated when the active drill rod and the drill rod are connected or disconnected. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the power head of an embodiment of the utility model;

[0027] Figure 2 This is a schematic structural diagram of the rear end cover of an embodiment of the utility model;

[0028] Figure 3 This is a schematic structural diagram of a gap M according to an embodiment of the present utility model;

[0029] Figure 4 This is a schematic diagram of the structure of the active drill rod according to an embodiment of the utility model;

[0030] Figure 5 It is a structural schematic diagram of the front end cover of an embodiment of the utility model. DETAILED DESCRIPTION

[0031] The following is further described in detail through specific implementation methods:

[0032] The figure marks in the drawings of the specification include: active drill rod 1, rod body 101, joint 102, female joint 103, stop block 104, limit section 105, connecting shaft 2, water braid 3, front end cover 4, fixed plate 401, outer sleeve 402, inner sleeve 403, chuck 5, main shaft 6, gearbox 7, rear end cover 8, connecting sleeve 9, inner ring 10.

[0033] Example

[0034] The embodiment is basically as shown in the attached Figure 1-5 As shown, Figure 1 The quick-release joint type drilling rig power head shown includes a gearbox 7, a main shaft 6, a connecting shaft 2 and a water braid 3. The main shaft 6 is rotatably installed inside the gearbox 7. The gearbox 7 can drive the main shaft 6 to rotate. The connecting shaft 2 is rotatably installed inside the main shaft 6. The right end of the connecting shaft 2 is set as an external thread, and the left end is set as a female thread. The left end of the main shaft 6 is fixedly installed with a rear end cover 8 by bolts. The rear end cover 8 includes an integrally formed connecting sleeve 9 and an inner ring 10, as shown in FIG. Figure 2As shown, the connecting sleeve 9 is symmetrically provided with waist-shaped holes, and the connecting sleeve 9 is fixedly installed on the left end of the main shaft 6 through bolts and the waist-shaped holes. The inner ring 10 is located in the middle of the connecting sleeve 9, and the core shaft of the water braid 3 rotates through the inner ring 10 and is threadedly connected with the left end of the connecting shaft 2. The middle of the inner ring 10 is set as a hexagonal hole, and the outer wall of the core shaft of the water braid 3 is set as a hexagonal shape that is clamped with the hexagonal hole. A gap M is set between the inner ring 10 and the connecting shaft 2, as shown in FIG. Figure 3 As shown, the right end of the spindle 6 is fixed with a chuck 5 by bolts, as shown in FIG. Figure 1 As shown, the chuck 5 is set as a normally open chuck, and the right end of the chuck 5 is provided with a front end cover 4. The chuck 5 and the front end cover 4 are rotatably mounted with an active drill rod 1, and the active drill rod 1 includes a rod body 101 and a joint 102. Figure 4 As shown, both ends of the rod body 101 are set as female joints 103, and both ends of the joint 102 are set as male joints. The male joint can be threadedly connected with the female joint 103 and the drill rod, and the outer diameter of the female joint 103 is smaller than the diameter after the chuck 5 is loosened. The front end cover 4 can drive the active drill rod 1 to rotate. The front end cover 4 includes a fixed plate 401 and an outer sleeve 402. Figure 5 As shown, the fixed plate 401 is set as a flange plate and is fixedly installed on the front end of the chuck 5 by bolts, the outer sleeve 402 is fixedly installed in the middle of the front end of the fixed plate 401, and the inner wall of the outer sleeve 402 is set as a hexagon, and the inner sleeve 403 is fixedly installed in the middle of the rear end of the fixed plate 401. The outer wall of the inner sleeve 403 is set as a hexagon, and the inner sleeve 403 is clamped with the front end of the chuck 5. The inner wall of the outer sleeve 402 is congruent with the inner wall of the inner sleeve 403 and is connected. The outer wall of the rod body 101 is fixedly installed with a stop block 104, as shown in FIG. Figure 4 As shown, the anti-rotation block 104 is engaged with the inner wall of the outer sleeve 402, and the diagonal distance of the anti-rotation block 104 is smaller than the diameter of the chuck 5 after it is loosened;

[0035] The outer wall of the rod body 101 is provided with a limiting section 105. Figure 4 As shown, the limit section 105 is located between the female connector 103 and the stop block 104, and the limit section 105 is located in the clamping range of the chuck 5. The diameter of the limit section 105 is smaller than the minimum diameter of the chuck 5 after clamping. The outer diameter of the female connector 103 and the distance between the opposite sides of the stop block 104 are both larger than the minimum diameter after clamping the chuck 5. The length of the limit section 105 is larger than the clamping width of the chuck 5, so that the limit section 105 has a certain axial float in the chuck 5.

[0036] The specific implementation process is as follows:

[0037] When the joint 102 is damaged, the staff can replace the joint 102, threadably connect the damaged male joint to the female joint 103 of the rod body 101, and dock the male joint that was previously threadably connected to the female joint 103 of the rod body 101 with the drill rod, thereby extending the service life of the active drill rod 1. When the male joints at both ends of the joint 102 are damaged, the staff only needs to replace a new joint 102 without taking out the active drill rod 1 for replacement, thereby quickly replacing the joint 102 and improving construction efficiency.

[0038] When it is necessary to switch to the chuck 5 to clamp the salvaged drill rod or the drill rod of different outer diameter for work, the staff only needs to loosen the chuck 5 and unlock the rear end cover 8 and the main shaft 6. At this time, the staff can pull out the active drill rod 1, the connecting shaft 2 and the water braid 3 from the main shaft 6 at the rear end of the gearbox 7, and then insert the salvaged drill rod or the drill rod of different outer diameter into the main shaft 6 from the rear end of the gearbox 7, and place the salvaged drill rod or the drill rod of different outer diameter in the clamping range of the chuck 5, and then start the chuck 5 to clamp the salvaged drill rod or the drill rod of different outer diameter for work, thereby quickly completing the replacement of the active drill rod 1, further increasing the construction efficiency.

[0039] The entire disassembly process is completed at the rear end of the gearbox 7 where there is ample space, and only the rear end cover 8 needs to be removed to remove the active drill rod 1, the connecting shaft 2 and the water braid 3 as a whole from the main shaft 6, which greatly reduces the operating difficulty of the staff and improves the construction efficiency.

[0040] The above is only an embodiment of the utility model, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the utility model, several deformations and improvements can be made, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A quick-release joint type drilling rig power head, comprising a gearbox, a main shaft, a connecting shaft and a water braid, wherein the main shaft is arranged inside the gearbox, the connecting shaft is arranged inside the main shaft, the water braid is arranged at the rear end of the gearbox, and the core shaft of the water braid is connected to the end of the connecting shaft, characterized in that: An active drill rod is provided at the front end of the connecting shaft. The active drill rod includes a rod body and a joint. Both ends of the rod body are arranged as female joints, and both ends of the joint are arranged as male joints. The male joint can be threadedly connected with the female joint and the drill rod. A front end cover is provided at the end of the main shaft away from the water braid. The inner wall of the front end cover is clamped with the rod body. The maximum diameter of the active drill rod is smaller than the minimum diameter inside the main shaft.

2. The quick-release joint type drilling rig power head according to claim 1, characterized in that: The front end cover includes a fixed disk and an outer sleeve. The fixed disk is arranged at the end of the chuck away from the water braid. The outer sleeve is arranged in the middle of the fixed disk, and the inner wall of the outer sleeve is arranged in a polygonal shape. A stop block is arranged on the outer wall of the rod body, and the stop block is clamped with the inner wall of the outer sleeve.

3. The quick-release joint type drilling rig power head according to claim 1, characterized in that: A rear end cover is provided at the end of the main shaft close to the water braid, and the rear end cover includes an integrally formed connecting sleeve and an inner ring. The connecting sleeve is provided at the end of the main shaft close to the water braid, the inner ring is located in the middle of the connecting sleeve, and the core shaft of the water braid rotates through the inner ring and is connected to the connecting shaft.

4. The quick-release joint type drilling rig power head according to claim 3, characterized in that: A chuck is arranged between the main shaft and the front end cover, and the chuck can limit the axial position of the active drill rod.

5. The quick-release joint type drilling rig power head according to claim 4, characterized in that: The rod body is provided with a limiting section, and the limiting section is located between the chucks. The outer diameter of the female joint and the distance between the opposite sides of the stop block are both larger than the minimum diameter after the chucks are clamped, and the diameter of the limiting section is smaller than the minimum diameter after the chucks are clamped.

6. The quick-release joint type drilling rig power head according to claim 5, characterized in that: The length of the limiting section is greater than the clamping width of the chuck, so that the limiting section has a certain axial float in the chuck.

7. The quick-release joint type drilling rig power head according to claim 6, characterized in that: The outer diameter of the joint and the diagonal distance of the anti-rotation block are both smaller than the diameter after the chuck is loosened.

8. The quick-release joint type drilling rig power head according to claim 2, characterized in that: An inner sleeve is arranged at one end of the fixed disk close to the chuck, and the inner sleeve is arranged at one end of the chuck away from the water braid. The inner sleeve is arranged in a polygonal shape, and the inner wall of the inner sleeve is congruent with and communicated with the inner wall of the outer sleeve.

9. The quick-release joint type drilling rig power head according to claim 3, characterized in that: A gap is provided between the inner ring and the connecting shaft.

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