An adjustable multi-angle drilling device for coal mining

Abstract

The present invention relates to the technical field of coal mine equipment, and in particular to an adjustable multi-angle drilling device for coal mine mining. Its technical solution includes: a mining positioning component, a drill bit transmission component is installed on one side of the mining positioning component, a positioning expansion component is installed at the bottom of the drill bit transmission component, and an expandable drill bit component for corresponding side wall protection according to the expansion size of the drill bit is installed at the bottom of the positioning expansion component. The lower hinged rod of the present invention cooperates with the two-way bending telescopic sleeve to deflect and slide along the surface of the drill bit to ensure that the hollow protective frame still rests on the inner wall of the hollow hinged rod, and the stones falling from the top of the corresponding hinged rod use the elasticity of the hollow protective frame to buffer the stones above, forming a second line of protection, avoiding the interference between the expandable drill bit frame and the electric telescopic rod caused by the small stones blocked by the two-way bending telescopic sleeve, thereby improving the stability of the drill bit during operation.

Description

Technical Field

[0001] The invention relates to the technical field of coal mine equipment, and in particular to an adjustable multi-angle drilling device for coal mine development. Background Art

[0002] During coal mining, drilling can be used to obtain geological information about underground coal seams, including the thickness, inclination, quality, etc. of the coal seams, providing necessary geological data for subsequent mining. The drilling results can help engineers determine the best mining plan, including coal mining technology, support methods, etc., to improve mining efficiency and ensure safety.

[0003] In the patent document with the published announcement number CN112664139B, an adjustable multi-angle drilling device for coal mining is disclosed, which is connected to a first fixed plate on the inner wall of a third connecting plate, a first angle adjustment device is connected to the outer wall of the first connecting plate, the output end of the angle adjustment device passes through a square groove and is connected to a telescopic device, a second angle adjustment device is connected to the outer wall of a connecting frame, the second angle adjustment device is matched with the first angle adjustment device at one end away from the connecting frame, a switch assembly is connected to the outer wall of the shell, and a fixing assembly and a cleaning assembly are connected to the top wall of the first support plate; thereby achieving a simple structure of the entire device and easy operation, the drill bit angle and size can be conveniently and effectively adjusted, and the drill bit surface can be cleaned, thereby improving the flexibility and service life of the device during use.

[0004] When the above device is in use, during the process of expanding the size of the drill bit, the distance between the expanded inner wall of the drill bit and the drill rod is large, and the gap between the expanded inner wall of the drill bit and the top of the drill bit is also large, resulting in a large amount of stones and the like being drilled into the space between the expanded inner wall of the drill bit and the drill rod during the coal mine drilling process. Since the drill bit rotates at a high speed, these stones will have a certain impact on the expanded inner wall of the drill bit and the top of the drill bit, causing the drill bit to easily shift in position or cause the expanded drill bit to deform.

[0005] Therefore, the present application proposes an adjustable multi-angle drilling device for coal mining. Summary of the invention

[0006] The purpose of the present invention is to address the problem in the background technology that a large number of stones and the like are drilled into the gap between the inner wall of the expanded drill bit and the drill rod, and the drill bit is in a high-speed rotating state during rotation. These stones will have a certain impact on the inner wall of the expanded drill bit and the top of the drill bit, causing the drill bit to easily shift in position or cause the expanded drill bit to deform, etc., and proposes an adjustable multi-angle drilling device for coal mining.

[0007] The technical solution of the present invention is: an adjustable multi-angle drilling device for coal mining, comprising a mining positioning assembly, a drill bit transmission assembly is installed on one side of the mining positioning assembly, a positioning expansion assembly is installed at the bottom of the drill bit transmission assembly, and an expandable drill bit assembly for corresponding side wall protection according to the expansion size of the drill bit is installed at the bottom of the positioning expansion assembly;

[0008] The positioning expansion assembly includes an electric telescopic rod, the outer side of the electric telescopic rod is slidably connected to an auxiliary tray, the bottom of the electric telescopic rod is hinged with a plurality of corresponding hinged rods arranged in a ring shape with respect to the surface of the auxiliary tray, and the bottom of the corresponding hinged rod is hinged with the same number of hollow hinged rods;

[0009] The expandable drill bit assembly includes a drill bit installed at the bottom of the electric telescopic rod, the hollow hinged rod is hinged above the drill bit on one side away from the corresponding hinged rod, the outer sides of the plurality of hollow hinged rods are fixedly connected to the same number of expandable drill bit racks, and a built-in drill bit block is slidably connected between every two of the expandable drill bit racks, a plurality of spherical receiving blocks are fixedly connected to the central outer wall of the electric telescopic rod, a stretching ball is rotatably connected to the inner wall of the spherical receiving block through a plurality of springs, and a hollow protective frame with an arc-shaped outer wall is fixedly connected to the side of the stretching ball away from the spherical receiving block through a two-way bending telescopic sleeve, a two-way hinged rod is hinged between the corresponding hinged rod and the hollow protective frame, and the hollow protective frame is arranged in a stretchable state with respect to the horizontal plane direction, the bottom of the two-way bending telescopic sleeve is hinged to a lower hinged rod, the bottom of the lower hinged rod is hinged to an articulated block, and the articulated block is slidably installed on the side wall of the drill bit.

[0010] Optionally, the positioning expansion component further comprises a motor fixedly mounted on the top of the electric telescopic rod, and a positioning ring is slidably connected to the outer side of the electric telescopic rod.

[0011] Optionally, a plurality of corresponding long rods are fixedly connected to the top of the auxiliary tray, and a correction rod is fixedly connected to a side of the plurality of corresponding long rods away from the auxiliary tray.

[0012] Optionally, the correction rod is slidably connected to a corresponding articulated rod on one side away from the electric telescopic rod, the corresponding articulated rod is hinged at the bottom of the positioning ring, two hollow articulated rods are hinged on both sides of the corresponding articulated rod, the hollow articulated rods are hinged to the outside of the electric telescopic rod, and the corresponding long rod is slidably installed inside the auxiliary tray.

[0013] Optionally, an auxiliary spring is fixedly connected to the inside of the correction rod, and a rubber sleeve is fixedly connected to the side of the correction rod away from the auxiliary spring.

[0014] Optionally, a long positioning plate is fixedly connected to the top of the motor, four rolls of detection wire are wound around the outer side of the long positioning plate, and the four rolls of detection wire are fixedly installed on the bottom of the positioning ring.

[0015] Optionally, the drill bit transmission assembly includes a bidirectional positioning long rod fixedly mounted on one side of the positioning long plate, one side of the bidirectional positioning long rod is slidably connected to a cross ball, and one side of the cross ball is mounted with a drill bit clamping block via a positioning ball.

[0016] Optionally, a cross groove is provided on the surface of the drill bit clamping block, and one side of the drill bit clamping block is rotatably connected to the first arc guide rail and the second arc guide rail through the cross groove, and the bidirectional positioning long rod is slidably installed on the inner walls of the second arc guide rail and the first arc guide rail.

[0017] Optionally, the mining positioning assembly includes a chassis frame, four universal positioning wheels are installed on both sides of the chassis frame, and a protective outer frame is fixedly connected to the top of the chassis frame.

[0018] Optionally, both sides of the protective outer frame are threadedly connected to a sliding positioning frame via two Y-axis threaded rods, the bottom of the sliding positioning frame is rotatably connected to an X-axis threaded rod, the drill bit clamping block is slidably installed on the inner wall of the sliding positioning frame, and the drill bit clamping block and the X-axis threaded rod are arranged in a threaded connection state.

[0019] In summary, the present application includes at least one of the following beneficial technical effects:

[0020] 1. The lower hinged rod cooperates with the two-way bending telescopic sleeve to deflect and slide along the surface of the drill bit to ensure that the hollow protective frame still rests on the inner wall of the hollow hinged rod, and the stones falling from the upper part of the corresponding hinged rod use the elasticity of the hollow protective frame to buffer the stones above, forming a second line of protection, avoiding the small stones that enter from the blocking of the two-way bending telescopic sleeve from interfering with the expanded drill bit frame and the electric telescopic rod, thereby improving the stability of the drill bit during operation;

[0021] 2. The bidirectional positioning long rod also slides toward the track of the first arc guide rail, and the second arc guide rail deflects along the drill bit clamping block. At the same time, the bidirectional positioning long rod drives the cross ball to deflect accordingly along the positioning ball through the rectangular block, so that the drill bit can be adjusted synchronously along the X-axis and the Y-axis, thereby improving the multi-angle controllability of the drill bit. The operation is relatively simple and labor-saving, which is convenient for the drill bit to mine coal according to different requirements;

[0022] 3. The telescopic part of the correction rod is attached to the inner wall of the coal mine cave where the drill bit is mining. Within the controllable range of the auxiliary spring and the rubber sleeve, it provides support for the inner wall of the mining cave to prevent the mine cave from collapsing when the drill bit is drilling, causing a large amount of stones to hit the drill bit and cause damage to the drill bit. At the same time, multiple correction rods are positioned on the inner wall of the mine cave, thereby firmly positioning the drill bit in the center to avoid the deviation of the drill bit center and cause low drilling accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the adjustable multi-angle coal mining drilling device of the present invention;

[0024] Figure 2 For the present invention Figure 1 Enlarged view of the middle A area;

[0025] Figure 3 This is a schematic diagram of the structure of the built-in drill block of the present invention;

[0026] Figure 4 It is a structural schematic diagram of the electric telescopic rod of the present invention;

[0027] Figure 5 For the present invention Figure 4 Enlarged view of the middle B area;

[0028] Figure 6 It is a structural schematic diagram of the drill bit of the present invention;

[0029] Figure 7 For the present invention Figure 6 Enlarged view of the middle C area;

[0030] Figure 8 It is a structural schematic diagram of the protective outer frame of the present invention;

[0031] Fig. 9 It is a structural schematic diagram of a bidirectional positioning long rod of the present invention;

[0032] Fig.10 For the present invention Fig. 9 Enlarged view of the middle D area;

[0033] Fig.11 It is a structural schematic diagram of the positioning ball of the present invention.

[0034] Reference numerals: 1. mining positioning assembly; 101. chassis frame; 102. universal positioning wheel; 103. protective outer frame; 2. drill bit transmission assembly; 201. Y-axis threaded rod; 202. sliding positioning frame; 203. drill bit clamping block; 204. X-axis threaded rod; 205. two-way positioning long rod; 206. first arc guide rail; 207. second arc guide rail; 208. cross ball; 3. positioning ball; 4. expandable drill bit assembly; 401. expandable drill bit frame; 402. built-in drill bit block; 403. drill bit; 404, two-way hinged rod; 405, hollow protective frame; 406, stretching ball; 407, spherical receiving block; 408, spring; 409, two-way bending telescopic sleeve; 410, lower hinged rod; 5, positioning expansion component; 501, positioning long plate; 502, motor; 503, detection line; 504, positioning ring; 505, auxiliary spring; 506, corresponding hinged rod; 507, hollow hinged rod; 508, correction rod; 509, corresponding long rod; 510, electric telescopic rod; 511, auxiliary tray. DETAILED DESCRIPTION

[0035] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0036] like Figure 1 As shown, an adjustable multi-angle drilling device for coal mining proposed by the present invention includes a mining positioning component 1, a drill bit transmission component 2 is installed on one side of the mining positioning component 1, a positioning expansion component 5 is installed at the bottom of the drill bit transmission component 2, and an expandable drill bit component 4 for performing corresponding side wall protection according to the expansion size of the drill bit is installed at the bottom of the positioning expansion component 5. The mining positioning component 1 includes a chassis frame 101, four universal positioning wheels 102 are installed on both sides of the chassis frame 101, and a protective outer frame 103 is fixedly connected to the top of the chassis frame 101. The device is positioned with the ground through the four universal positioning wheels 102, which is convenient for coal mining;

[0037] like Figure 8-Figure 11As shown, the drill transmission assembly 2 includes a bidirectional positioning long rod 205 fixedly mounted on one side of the positioning long plate 501, a cross ball 208 is slidably connected to one side of the bidirectional positioning long rod 205, a drill clamping block 203 is installed on one side of the cross ball 208 through a positioning ball 3, and both sides of the protective outer frame 103 are threadedly connected to the sliding positioning frame 202 through two Y-axis threaded rods 201, and the bottom of the sliding positioning frame 202 is rotatably connected to the X-axis threaded rod 204, the drill clamping block 203 is slidably mounted on the inner wall of the sliding positioning frame 202, and the drill clamping block 203 and the X-axis threaded rod 204 are arranged in a threaded connection state, and the chassis frame 101 is provided with a plurality of screw terminals. A first auxiliary motor connected to two Y-axis threaded rods 201 is fixedly installed, and the auxiliary motor drives the two Y-axis threaded rods 201 to rotate, and the sliding positioning frame 202 slides along the slide rail of the chassis frame 101 along the X-axis through the threaded guides of the two Y-axis threaded rods 201, and the second auxiliary motor fixedly installed on the sliding positioning frame 202 drives the X-axis threaded rod 204 to rotate, and the drill bit clamping block 203 slides along the track of the drill bit clamping block 203 along the threaded guides on the X-axis threaded rod 204, and then cooperates with the drilling device to perform corresponding drilling along the X-axis and Y-axis in the nearby area, so as to obtain more information of the specified coal mine area;

[0038] A cross groove is provided on the surface of the drill bit clamping block 203, and a first arc guide rail 206 and a second arc guide rail 207 are rotatably connected to one side of the drill bit clamping block 203 through the cross groove. A bidirectional positioning long rod 205 is slidably mounted on the inner walls of the second arc guide rail 207 and the first arc guide rail 206. A first forward and reverse motor connected to the second arc guide rail 207 and a second reverse motor connected to the first arc guide rail 206 are fixedly mounted on the drill bit clamping block 203, and the arc track of the first arc guide rail 206 is located above the arc track of the second arc guide rail 207.

[0039] As the output shaft of the first forward and reverse motor drives the first arc guide rail 206 to rotate, the second arc guide rail 207 slides along the inner wall of the second arc guide rail 207 under the push of the second arc guide rail 207. At the same time, a rectangular block is fixedly installed at the connection between the two-way positioning long rod 205 and the cross ball 208, and then the rectangular block slides along the cross track of the cross ball 208 to complete the deflection of the X-axis angle. At the same time, as the second forward and reverse motor drives the second arc guide rail 207 to rotate, the second arc guide rail 207 drives the two-way positioning long rod 205 to slide along the inner wall of the first arc guide rail 206. Since the rectangular block is larger than the cross ball 208, that is, in the transmission path of the 20 parallel track, when the two-way positioning long rod 205 slides along the track of the first arc guide rail 206, the two-way positioning The positioning long rod 205 drives the cross ball 208 to deflect along the surface of the positioning ball 3 through the rectangular block, thereby realizing the linkage conversion of the drill bit at multiple angles. For example, when the two-way positioning long rod 205 first slides along the second arc guide rail 207 and the track parallel to the second arc guide rail 207 on the cross ball 208, the two-way positioning long rod 205 also slides toward the track of the first arc guide rail 206, and the second arc guide rail 207 deflects along the drill bit clamping block 203. At the same time, the two-way positioning long rod 205 drives the cross ball 208 to deflect accordingly along the positioning ball 3 through the rectangular block, and then the drill bit can be adjusted synchronously along the X-axis and the Y-axis, thereby improving the controllability of the drill bit at multiple angles. The operation is relatively simple and labor-saving, which is convenient for the drill bit to mine coal according to different requirements.

[0040] In this embodiment, Figure 1-Figure 7The expandable drill bit assembly 4 includes a drill bit 403 installed at the bottom of the electric telescopic rod 510, a hollow hinged rod 507 is hinged above the drill bit 403 at one side away from the corresponding hinged rod 506, the outer sides of the plurality of hollow hinged rods 507 are fixedly connected with the same number of expandable drill bit racks 401, a built-in drill bit block 402 is slidably connected between every two expandable drill bit racks 401, a plurality of spherical receiving blocks 407 are fixedly connected to the central outer wall of the electric telescopic rod 510, and a stretching ball 406 is rotatably connected to the inner wall of the spherical receiving block 407 through a plurality of springs 408, and the stretching ball 406 is away from the spherical receiving block 408. One side of the receiving block 407 is fixedly connected to a hollow protective frame 405 with an arc-shaped outer wall through a bidirectional bending telescopic sleeve 409, a bidirectional hinged rod 404 is hinged between the corresponding hinged rod 506 and the hollow protective frame 405, and the hollow protective frame 405 is set in a stretchable state with respect to the horizontal plane direction, and a lower hinged rod 410 is hinged at the bottom of the bidirectional bending telescopic sleeve 409, and a hinge block is hinged at the bottom of the lower hinged rod 410, and the hinge block is slidably installed on the side wall of the drill bit 403. In the process of the drill bit 403 and the expandable drill bit frame 401 being matched to perform drill bit expansion, the drill bit 403 in a normal state The upper and lower bending parts of the bidirectional bending telescopic sleeve 409 and the hollow protective frame 405 are respectively blocked at the space between the hollow hinged rod 507 and the electric telescopic rod 510 and directly above the hollow hinged rod 507, forming the first line of protection to prevent larger stones from entering between the expandable drill bit frame 401 and the electric telescopic rod 510 and interfering with the rotation of the drill bit. As the drill bit 403 and the expandable drill bit frame 401 are matched to expand the drill bit, the corresponding hinged rod 506 is bent through the bidirectional hinged rod 404 to drive the bidirectional bending telescopic sleeve 409 to stretch the ball 406 in the ball The receiving block 407 rolls accordingly. During this process, the lower hinge rod 410 cooperates with the two-way bending telescopic sleeve 409 to deflect and slide along the surface of the drill bit 403 to ensure that the hollow protective frame 405 is still against the inner wall of the hollow hinge rod 507, and the stones falling from the corresponding hinge rod 506 are buffered by the elasticity of the hollow protective frame 405 to form a second line of protection, so as to avoid the small stones entering from the blocking of the two-way bending telescopic sleeve 409 from interfering with the expandable drill bit frame 401 and the electric telescopic rod 510, thereby improving the stability of the drill bit during operation;

[0041] The positioning expansion component 5 includes an electric telescopic rod 510, and an auxiliary tray 511 is slidably connected to the outer side of the electric telescopic rod 510. A plurality of corresponding hinged rods 506 arranged in a ring shape on the surface of the auxiliary tray 511 are hinged at the bottom of the electric telescopic rod 510. The same number of hollow hinged rods 507 are hinged at the bottom of the corresponding hinged rods 506. When drilling, the staff pushes the auxiliary tray 511 down along the electric telescopic rod 510 according to the size of the drill bit required for drilling. There are a plurality of threaded holes at the bottom of the electric telescopic rod 510. The auxiliary tray 511 is moved between every two threaded holes, and screws are installed through the threaded holes. The auxiliary tray 511 is positioned at this time, and the auxiliary tray 511 is bent along the corresponding hinge rod 506 and the hollow hinge rod 507. The hollow hinge rod 507 drives the expandable drill frame 401 to deflect synchronously, so that the expandable drill frame 401 and the drill bit 403 form a corresponding drill bit. During the deflection of the expandable drill frame 401, the built-in drill block 402 is drawn out from the expandable drill frame 401, and an expansion state is formed between the expandable drill frame 401 and the built-in drill block 402. In the mining process, the lines on the expandable drill frame 401 and the drill bit 403 are used to drill the coal mining area;

[0042] The positioning expansion component 5 also includes a motor 502 fixedly mounted on the top of the electric telescopic rod 510. A positioning ring 504 is fixedly connected to the outer side of the electric telescopic rod 510. The motor 502 drives the drill bit 403 to rotate to mine the coal mine. The positioning ring 504 is connected to the non-retractable part of the electric telescopic rod 510. If the hole dug is a hole perpendicular to the ground and the hole dug is deep, the positioning ring 504 is fitted with the base on the ground and positioned with bolts to ensure that the drill bit 403 does not shake during mining. A plurality of corresponding long rods 509 are fixedly connected to the top of the auxiliary tray 511. A correction rod 508 is fixedly connected to the side of the plurality of corresponding long rods 509 away from the auxiliary tray 511. One side of the correction rod 508 The correction rod 508 is slidably installed on the outside of the electric telescopic rod 510, and the side of the correction rod 508 away from the electric telescopic rod 510 is slidably connected with a corresponding hinged rod 506. The corresponding hinged rod 506 is set below the positioning ring 504 through a tray. The corresponding long rod 509 is a similar component to the tray, and its diameter is smaller than the normal diameter of the drill bit 403. Two hollow hinged rods 507 are hinged on both sides of the corresponding hinged rod 506. The hollow hinged rod 507 is hinged on the outside of the electric telescopic rod 510. The corresponding long rod 509 is slidably installed in the inside of the auxiliary tray 511. The corresponding long rod 509 slides along the inside of the auxiliary tray 511 and does not contact the inner wall of the auxiliary tray 511. The corresponding long rod 509 is located between the two corresponding hinged rods 506 and is connected to the correction rod 508 on one side of the surface of the electric telescopic rod 510. The telescopic part of the correction rod 508 contacts the corresponding hinged rod 506, and the non-telescopic part is connected to the corresponding long rod 509. The interior of the correction rod 508 is fixedly connected with an auxiliary spring 505, and the side of the correction rod 508 away from the auxiliary spring 505 is fixedly connected with a rubber sleeve. As the positioning ring 504 moves downward with the drill bit 403 below, the drill bit size formed by the cooperation between the drill bit 403 and the expandable drill bit rack 401 causes the auxiliary tray 511 to drive the correction rod 508 to slide at the electric telescopic rod 510, and the electric telescopic rod 510 presses down the corresponding hinged rod 506, causing the hollow hinged rod 507 and the corresponding hinged rod 506 to bend. During the bending process, the corresponding hinged rod 506 drives the correction rod 508 to perform telescopic movement. The telescopic part of the correction rod 508 fits on the inner wall of the coal mine hole mined by the drill bit 403. Within the controllable range of the auxiliary spring 505 and the rubber sleeve, the inner wall of the mined mine hole is supported to prevent the mine hole collapse when the drill bit 403 is drilling, causing a large amount of stones to hit the drill bit and causing damage to the drill bit. At the same time, multiple correction rods 508 are positioned on the inner wall of the mine hole, thereby firmly positioning the drill bit in the central position to prevent the drill bit center from shifting and causing low drilling accuracy.

[0043] The top of the motor 502 is fixedly connected to a positioning long plate 501, the outer side of the positioning long plate 501 is fixedly connected to a detection line 503, and the detection line 503 is fixedly installed at the bottom of the positioning ring 504. After the positioning ring 504 is fixed to the base, the staff can pull the detection lines 503 on the four sides to observe whether there is bending or shaking between the positioning ring 504 and the base, so as to ensure that the connection between the base and the device is relatively stable when mining deeper mines vertically on the ground.

[0044] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

[0045] "Comprising" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or also includes elements inherent to such process, method, article, or apparatus.

[0046] The above specific embodiments are only several optional embodiments of the present invention. Based on the technical solutions of the present invention and the relevant inspirations of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. An adjustable multi-angle drilling device for coal mining, comprising a mining positioning component (1), characterized in that: A drill bit transmission component (2) is installed on one side of the mining positioning component (1), a positioning expansion component (5) is installed at the bottom of the drill bit transmission component (2), and an expandable drill bit component (4) for performing corresponding side wall protection according to the expansion size of the drill bit is installed at the bottom of the positioning expansion component (5); The positioning expansion assembly (5) comprises an electric telescopic rod (510), the outer side of the electric telescopic rod (510) is slidably connected to an auxiliary tray (511), the bottom of the electric telescopic rod (510) is hinged with a plurality of corresponding hinged rods (506) arranged in a ring shape with respect to the surface of the auxiliary tray (511), and the bottom of the corresponding hinged rod (506) is hinged with the same number of hollow hinged rods (507); The expandable drill bit assembly (4) comprises a drill bit (403) mounted at the bottom of an electric telescopic rod (510); a side of the hollow hinged rod (507) away from the corresponding hinged rod (506) is hinged above the drill bit (403); the outer sides of a plurality of the hollow hinged rods (507) are fixedly connected to the same number of expandable drill bit racks (401); a built-in drill bit block (402) is slidably connected between every two of the expandable drill bit racks (401); a plurality of spherical receiving blocks (407) are fixedly connected to the central outer wall of the electric telescopic rod (510); the inner wall of the spherical receiving block (407) is rotated by a plurality of springs (408) to form a plurality of spherical receiving blocks (407). A stretching ball (406) is connected, and a side of the stretching ball (406) away from the spherical receiving block (407) is fixedly connected to a hollow protective frame (405) with an arc-shaped outer wall through a bidirectional bending telescopic sleeve (409), a bidirectional hinged rod (404) is hinged between the corresponding hinged rod (506) and the hollow protective frame (405), and the hollow protective frame (405) is arranged in a stretchable state with respect to the horizontal plane direction, and a lower hinged rod (410) is hinged at the bottom of the bidirectional bending telescopic sleeve (409), and a hinged block is hinged at the bottom of the lower hinged rod (410), and the hinged block is slidably installed on the side wall of the drill bit (403).

2. The adjustable multi-angle drilling device for coal mining according to claim 1 is characterized in that: The positioning expansion assembly (5) further comprises a motor (502) fixedly mounted on the top of the electric telescopic rod (510), and a positioning ring (504) is fixedly connected to the outer side of the electric telescopic rod (510).

3. The adjustable multi-angle drilling device for coal mining according to claim 2 is characterized in that: A plurality of corresponding long rods (509) are fixedly connected to the top of the auxiliary tray (511); a correction rod (508) is fixedly connected to one side of the plurality of corresponding long rods (509) away from the auxiliary tray (511); and one side of the correction rod (508) is slidably mounted on the outside of the electric telescopic rod (510) via a slide.

4. The adjustable multi-angle drilling device for coal mining according to claim 3 is characterized in that: The side of the correction rod (508) away from the electric telescopic rod (510) is slidably connected to a corresponding hinged rod (506); the corresponding hinged rod (506) is arranged below the positioning ring (504) through a tray; two hollow hinged rods (507) are hinged on both sides of the corresponding hinged rod (506); the hollow hinged rods (507) are hinged on the outside of the electric telescopic rod (510); and the corresponding long rod (509) is slidably installed inside the auxiliary tray (511).

5. The adjustable multi-angle drilling device for coal mining according to claim 4, characterized in that: An auxiliary spring (505) is fixedly connected inside the correction rod (508), and a rubber sleeve is fixedly connected to a side of the correction rod (508) away from the auxiliary spring (505).

6. The adjustable multi-angle drilling device for coal mining according to claim 5, characterized in that: The top of the motor (502) is fixedly connected to a positioning long plate (501), the outer side of the positioning long plate (501) is fixedly connected to a detection line (503), and the detection line (503) is fixedly installed on the bottom of the positioning ring (504).

7. The adjustable multi-angle drilling device for coal mining according to claim 6, characterized in that: The drill bit transmission assembly (2) comprises a bidirectional positioning long rod (205) fixedly mounted on one side of the positioning long plate (501), one side of the bidirectional positioning long rod (205) is slidably connected to a cross ball (208), and one side of the cross ball (208) is mounted with a drill bit clamping block (203) via a positioning ball (3).

8. The adjustable multi-angle drilling device for coal mining according to claim 7, characterized in that: A cross groove is formed on the surface of the drill bit clamping block (203); one side of the drill bit clamping block (203) is rotatably connected to a first arc guide rail (206) and a second arc guide rail (207) via the cross groove; and the bidirectional positioning long rod (205) is slidably mounted on the inner walls of the second arc guide rail (207) and the first arc guide rail (206).

9. The adjustable multi-angle drilling device for coal mining according to claim 7, characterized in that: The mining positioning assembly (1) comprises a chassis frame (101), four universal positioning wheels (102) are installed on both sides of the chassis frame (101), and a protective outer frame (103) is fixedly connected to the top of the chassis frame (101).

10. The adjustable multi-angle drilling device for coal mining according to claim 9, characterized in that: The two sides of the protective outer frame (103) are threadedly connected to a sliding positioning frame (202) via two Y-axis threaded rods (201); the bottom of the sliding positioning frame (202) is rotatably connected to an X-axis threaded rod (204); the drill bit clamping block (203) is slidably mounted on the inner wall of the sliding positioning frame (202); and the drill bit clamping block (203) and the X-axis threaded rod (204) are arranged in a threaded connection state.

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