Quick joint for main shaft of rock drilling machine for coal mine

Abstract

The utility model discloses a rock drilling machine spindle quick connector for a coal mine, and relates to the technical field of coal mine machinery. Comprising a connector body, the connector body comprises a drilling machine connecting rod and a drill rod connecting rod, the drilling machine connecting rod is installed on the upper surface of the drill rod connecting rod, a fixing plate is fixedly installed at the position, close to the middle, of the outer surface of the drill rod connecting rod, a first limiting mechanism is fixedly installed on the upper surface of the fixing plate, and a second limiting mechanism is fixedly installed on the lower surface of the fixing plate; the drilling machine connecting rod and the drilling machine are limited through the first limiting mechanism, and then the drilling rod connecting rod and the drilling rod are limited through the second limiting mechanism, so that relative rotation between the connector body and the drilling machine and between the connector body and the drilling rod is avoided, and external threads and internal teeth of a threaded hole are not prone to damage; and the joint main body is more firmly and stably connected with the drilling machine and the drilling rod, is not easy to fall off and is safer to use.

Description

Technical Field

[0001] This utility model relates to the field of coal mining machinery technology, specifically a quick coupling for the spindle of a rock drilling rig used in coal mines. Background Technology

[0002] Currently, a relatively direct and effective anti-impact measure is to construct pre-decompression boreholes in the impact-hazardous area. Under certain conditions, the larger the borehole diameter, the better the decompression effect. However, constructing larger diameter boreholes requires larger drilling tools (such as drilling rigs), but the underground working space is limited, and larger drilling tools will occupy a large proportion of the safety space. To solve this contradiction, the inventors, combining the actual conditions of the mine site and comprehensively considering the performance of various drilling tools, developed and used a new type of quick-connect coupling for the spindle of a coal mine rock drilling rig.

[0003] In the existing technology, conventional rock drilling rig spindle quick couplings are connected to the drilling rig via an external thread on the upper side and to a drill rod with an external thread in the lower threaded hole. During use, the threads between the quick coupling and the drilling rig and drill rod are easily damaged by stress. After the threads are damaged, the connection between the quick coupling and the drilling rig and drill rod becomes unstable and easily falls off, posing a safety hazard and making it unsuitable for use. Utility Model Content

[0004] This invention provides a quick connector for the spindle of a rock drilling rig used in coal mines to solve the problems in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a quick connector for the spindle of a rock drilling rig for coal mines, comprising a connector body, the connector body including a drilling rig connecting rod and a drill rod connecting rod, the drilling rig connecting rod being installed on the upper surface of the drill rod connecting rod, a fixing plate being fixedly installed on the outer surface of the drill rod connecting rod near the middle position, a first limiting mechanism being fixedly installed on the upper surface of the fixing plate, and a second limiting mechanism being fixedly installed on the lower surface of the fixing plate.

[0006] Furthermore, the drilling rig connecting rod and the drill rod connecting rod are integrally formed structures.

[0007] Furthermore, the outer surface of the drill rod connecting rod is provided with external threads, and the lower surface of the drill rod connecting rod is provided with threaded holes.

[0008] Furthermore, the first limiting mechanism includes a first spring, a first movable plate, a limiting rod, a limiting plate, and a limiting hole. The first spring is fixedly installed on the upper surface of the fixed plate. The first movable plate is fixedly installed on the upper surface of the first spring. Limiting rods are fixedly installed on the upper surface of the first movable plate near the left and right sides. The limiting plate is fixedly installed on the upper edge of the outer surface of the drill rod connecting rod. A limiting hole is provided on the limiting plate for the limiting rod to pass through.

[0009] Furthermore, the second limiting mechanism includes a second spring, a second movable plate, a limiting sleeve, a limiting protrusion, and a notch. The second spring is fixedly installed on the lower surface of the fixed plate. The second movable plate is fixedly installed on the lower surface of the second spring. The limiting sleeve is fixedly installed on the lower surface of the second movable plate. A limiting protrusion is provided at the center of the four sides of the inner wall of the limiting sleeve. A notch is provided on the outer surface of the drill rod connecting rod corresponding to the limiting protrusion.

[0010] Furthermore, through holes are provided on both the first and second movable plates at positions corresponding to the drill rod connecting rod.

[0011] Compared with the prior art, this utility model provides a quick coupling for the spindle of a rock drilling rig in a coal mine, which has the following advantages:

[0012] 1. The quick-connect coupling for the main spindle of the coal mine rock drilling rig connects with the flange on the drilling rig through a first limiting mechanism, preventing relative rotation between the coupling body and the drilling rig. Therefore, the external thread on the drilling rig connecting rod is less likely to be damaged by stress, and the drilling rig and the drilling rig connecting rod are less likely to detach, resulting in a more secure and stable installation.

[0013] 2. The quick-connect coupling for the main spindle of this coal mine rock drilling rig uses a second limiting mechanism to limit the drill rod on the lower side of the drill rod connecting rod, preventing relative rotation between the drill rod connecting rod and the drill rod. This makes the teeth inside the threaded hole less prone to damage, and the connection between the coupling body and the drill rod is more secure and stable, less likely to fall off, and safer to use. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a cross-sectional view of the present invention;

[0016] Figure 3 This is a top view of the present invention;

[0017] Figure 4 This is a bottom view of the present invention.

[0018] In the diagram: 1. Connector body; 101. Drill rig connecting rod; 102. Drill rod connecting rod; 2. Fixing plate; 3. First limiting mechanism; 301. First spring; 302. First moving plate; 303. Limiting rod; 304. Limiting plate; 305. Limiting hole; 4. Second limiting mechanism; 401. Second spring; 402. Second moving plate; 403. Limiting sleeve; 404. Limiting protrusion; 405. Notch; 5. External thread; 6. Threaded hole; 7. Through hole. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figures 1-4 This utility model discloses a quick connector for the spindle of a rock drilling rig for coal mines, including a connector body 1. The connector body 1 includes a drilling rig connecting rod 101 and a drill rod connecting rod 102. The drilling rig connecting rod 101 is installed on the upper surface of the drill rod connecting rod 102. A fixing plate 2 is fixedly installed on the outer surface of the drill rod connecting rod 102 near the middle position. A first limiting mechanism 3 is fixedly installed on the upper surface of the fixing plate 2, and a second limiting mechanism 4 is fixedly installed on the lower surface of the fixing plate 2.

[0021] Specifically, the drilling rig connecting rod 101 and the drill rod connecting rod 102 are integrally formed structures.

[0022] In this embodiment, the drill rig connecting rod 101 and the drill rod connecting rod 102 have high strength and are not easily damaged.

[0023] Specifically, the outer surface of the drill connecting rod 101 is provided with an external thread 5, and the lower surface of the drill rod connecting rod 102 is provided with a threaded hole 6.

[0024] In this embodiment, the external thread 5 facilitates the threaded connection between the drill rig connecting rod 101 and the drill rig, and the threaded hole 6 satisfies the requirement that the drill rod with the threaded rod structure be threadedly installed inside the drill rod connecting rod 102.

[0025] Specifically, the first limiting mechanism 3 includes a first spring 301, a first moving plate 302, a limiting rod 303, a limiting plate 304, and a limiting hole 305. The first spring 301 is fixedly installed on the upper surface of the fixed plate 2. The first moving plate 302 is fixedly installed on the upper surface of the first spring 301. The limiting rods 303 are fixedly installed on the upper surface of the first moving plate 302 near the left and right sides. The limiting plate 304 is fixedly installed on the upper edge of the outer surface of the drill rod connecting rod 102. The limiting plate 304 has a limiting hole 305 for the limiting rod 303 to pass through.

[0026] In this embodiment, the first spring 301 pushes the first moving plate 302 to move upward, causing the first moving plate 302 to push the limiting rod 303 to move upward. The limiting rod 303 passes through the upper limit hole 305 of the limiting plate 304 and is inserted into the flange hole on the flange of the drilling rig, so that the drilling rig connecting rod 101 and the drilling rig are mutually limited. Therefore, the drilling rig connecting rod 101 will not rotate inside the drilling rig. Therefore, the external thread 5 is not easily damaged, and the drilling rig connecting rod 101 will not fall out of the drilling rig due to rotation.

[0027] Specifically, the second limiting mechanism 4 includes a second spring 401, a second moving plate 402, a limiting sleeve 403, a limiting protrusion 404, and a notch 405. The second spring 401 is fixedly installed on the lower surface of the fixed plate 2. The second moving plate 402 is fixedly installed on the lower surface of the second spring 401. The limiting sleeve 403 is fixedly installed on the lower surface of the second moving plate 402. The limiting protrusion 404 is provided at the middle position of the four sides of the inner wall of the limiting sleeve 403. The notch 405 is opened on the outer surface of the drill rod connecting rod 102 corresponding to the limiting protrusion 404.

[0028] In this embodiment, the second spring 401 pushes the second moving plate 402 downward, and the second moving plate 402 drives the limiting sleeve 403 downward, so that the limiting protrusion 404 inside the limiting sleeve 403 moves downward along the notch groove 405, so that the limiting sleeve 403 and the limiting protrusion 404 are sleeved on the outer side of the upper end of the inner drill rod. Since the drill rods with threaded connections are currently rectangular near the thread, the limiting sleeve 403 and the limiting protrusion 404 limit the outer surface of the drill rod, so that the drill rod will not rotate in the threaded hole 6. Therefore, the internal thread structure of the threaded hole 6 will not be damaged, and the connection between the drill rod and the drill rod connecting rod 102 is more firm and stable.

[0029] Specifically, through holes 7 are provided on the first moving plate 302 and the second moving plate 402 at positions corresponding to the drill rod connecting rod 102.

[0030] In this embodiment, the through hole 7 satisfies the requirement for the first moving plate 302 and the second moving plate 402 to move up and down along the drill rod connecting rod 102.

[0031] In use, the first moving plate 302 in the first limiting mechanism 3 is pushed downwards, causing the limiting rod 303 to retract into the limiting plate 304, so that the drill connecting rod 101 is connected to the drill through the external thread 5. The first moving plate 302 is then released, causing the first spring 301 to push the first moving plate 302 upwards, which in turn pushes the limiting rod 303 upwards. The limiting rod 303 passes through the upper limiting hole 305 in the limiting plate 304 and is inserted into the flange hole on the upper flange of the drill, thus limiting the drill connecting rod 101 and the drill. Therefore, the drill connecting rod 101 will not rotate inside the drill, and the external thread 5 is less likely to be damaged. The drill connecting rod 101 will also not fall out of the drill due to rotation. This causes the second moving plate 402 in the second limiting mechanism 4 to move the limiting sleeve 403 upwards. When the lower surface of the limiting sleeve 403 is higher than the lower surface of the drill rod connecting rod 102, the threaded drill rod is threaded into the threaded hole 6. The second moving plate 402 is then released, and the second spring 401 pushes the second moving plate 402 downwards. The second moving plate 402 drives the limiting sleeve 403 downwards, causing the limiting protrusion 404 inside the limiting sleeve 403 to move downwards along the notch 405. This allows the limiting sleeve 403 and the limiting protrusion 404 to be fitted onto the outer side of the upper end of the inner drill rod. Since the currently threaded drill rods have rectangular structures near the threads, the limiting sleeve 403 and the limiting protrusion 404 limit the outer surface of the drill rod, preventing the drill rod from rotating within the threaded hole 6. Therefore, the internal thread structure of the threaded hole 6 is not damaged, making the connection between the drill rod and the drill rod connecting rod 102 more secure and stable, and safer to use.

[0032] In summary, this quick-connect coupling for the main spindle of a coal mine rock drilling rig limits the distance between the drilling rig connecting rod 101 and the drilling rig through the first limiting mechanism 3, and further limits the distance between the drill rod connecting rod 102 and the drill rod through the second limiting mechanism 4. This prevents relative rotation between the coupling body 1 and the drilling rig and drill rod, making it less prone to damage to the teeth of the external thread 5 and the internal teeth of the threaded hole 6. Furthermore, the connection between the coupling body 1 and the drilling rig and drill rod is more secure and stable, less likely to fall off, and safer to use.

[0033] Although 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 alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A quick coupling for the spindle of a rock drilling rig in a coal mine, comprising a coupling body (1), characterized in that: The joint body (1) includes a drilling rig connecting rod (101) and a drill rod connecting rod (102). The drilling rig connecting rod (101) is installed on the upper surface of the drill rod connecting rod (102). A fixing plate (2) is fixedly installed on the outer surface of the drill rod connecting rod (102) near the middle position. A first limiting mechanism (3) is fixedly installed on the upper surface of the fixing plate (2), and a second limiting mechanism (4) is fixedly installed on the lower surface of the fixing plate (2).

2. The quick coupling for the spindle of a rock drilling rig for coal mines according to claim 1, characterized in that: The drilling rig connecting rod (101) and the drill rod connecting rod (102) are integrally formed structures.

3. The quick coupling for the spindle of a rock drilling rig for coal mines according to claim 1, characterized in that: The outer surface of the drill connecting rod (101) is provided with external threads (5), and the lower surface of the drill rod connecting rod (102) is provided with threaded holes (6).

4. The quick coupling for the spindle of a rock drilling rig for coal mines according to claim 1, characterized in that: The first limiting mechanism (3) includes a first spring (301), a first moving plate (302), a limiting rod (303), a limiting plate (304), and a limiting hole (305). The first spring (301) is fixedly installed on the upper surface of the fixed plate (2). The first moving plate (302) is fixedly installed on the upper surface of the first spring (301). The limiting rods (303) are fixedly installed on the upper surface of the first moving plate (302) near the left and right sides. The limiting plate (304) is fixedly installed on the upper edge of the outer surface of the drill rod connecting rod (102). The limiting plate (304) has a limiting hole (305) for the limiting rod (303) to pass through.

5. A quick coupling for the spindle of a rock drilling rig for coal mines according to claim 1, characterized in that: The second limiting mechanism (4) includes a second spring (401), a second moving plate (402), a limiting sleeve (403), a limiting protrusion (404), and a notch (405). The second spring (401) is fixedly installed on the lower surface of the fixed plate (2). The second moving plate (402) is fixedly installed on the lower surface of the second spring (401). The limiting sleeve (403) is fixedly installed on the lower surface of the second moving plate (402). The limiting protrusion (404) is provided at the middle position of the four sides of the inner wall of the limiting sleeve (403). The notch (405) is opened on the outer surface of the drill rod connecting rod (102) corresponding to the limiting protrusion (404).

6. A quick coupling for the spindle of a rock drilling rig for coal mines according to claim 4, characterized in that: Through holes (7) are provided on the first movable plate (302) and the second movable plate (402) at positions corresponding to the drill rod connecting rod (102).

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