Split locking bidirectional transmission device and method for underground coal mine intermediate adding and removing rod drilling machine

Abstract

The application provides a split locking bidirectional transmission device and method for an intermediate adding and removing rod drilling machine in a coal mine underground, which comprises a power shaft and a transmission shaft connected in sequence, and a locker is sleeved outside the power shaft and the transmission shaft; the locker comprises a locking seat, the locking seat comprises a hollow locking shaft, two or more than two positioning cavities are arranged on the locking shaft in a radial direction and are arranged at equal intervals in a circumferential direction, and a positioning ball is installed in each positioning cavity; the power shaft comprises a hollow power shaft body, and an arc-shaped positioning groove is arranged on the outer surface of the power shaft body; when the power shaft body of the power shaft is sleeved in the locking shaft to a state where the positioning cavities are radially aligned with the arc-shaped positioning groove, the radially inner side of the positioning ball can enter the arc-shaped positioning groove to realize locking. The split structure, threaded quick disassembly, axial locking anti-loosening, component part replacement and other technical means are adopted, bidirectional power transmission is realized, the service life of the transmission device is improved, the disassembly and replacement efficiency is improved, and the comprehensive use cost is reduced.

Description

Technical Field

[0001] This invention belongs to the field of underground tunnel drilling technology in coal mines, and relates to transmission devices for drilling rigs, specifically to a split-lock bidirectional transmission device and its usage method for underground intermediate rod loading and unloading drilling rigs in coal mines. Background Technology

[0002] Drilling is an effective technical means for geological exploration and disaster prevention in underground coal mines. The drilling rig is the core equipment for drilling operations, requiring the continuous addition and removal of drill rods to achieve long-distance drilling. Currently, there are two main methods for adding and removing drill rods: rear-mounted and intermediate-mounted.

[0003] The rear-mounted rod loading / unloading refers to loading and unloading drill rods from the rear of the drill rig's power head. This requires first removing the water supply device, then connecting / disconnecting the drill rod, and then connecting the water supply device again. Although it does not require a special transmission device, the loading / unloading process is long and time-consuming, and it is mainly used for conventional drilling rigs.

[0004] Intermediate loading / unloading rods refer to the process of loading and unloading drill rods between the drill rig's power head and the gripper. It employs a dedicated transmission device. Each time a drill rod is loaded or unloaded, only the threads between the transmission device and the drill rod need to be disconnected and reconnected. The loading / unloading operation is simple and fast, and it is mainly used in automated and intelligent drilling rigs to achieve automatic loading and unloading of drill rods. Currently, the transmission devices all adopt an integrated structure, which has the following shortcomings in practical applications:

[0005] (A) Short service life. During drilling operations, the threads between the transmission device and the drill rod need to be frequently disassembled and reconnected, which causes the connecting threads between the transmission device and the drill rod to wear out and fail, resulting in a short service life.

[0006] (B) Low efficiency in disassembly and replacement. When the transmission device is damaged and needs to be replaced, the entire transmission device needs to be removed from the drilling rig power head, and then a new transmission device needs to be installed and connected. However, the transmission device and the drilling rig power head are generally connected by flanges, and considering the high torque transmission requirements of the drilling rig, a large number of connecting bolts are required. Each disassembly and installation takes a long time and is inefficient.

[0007] (C) High overall cost. Considering the need for high torque transmission in drilling rigs, in order to improve the overall strength of the transmission device, the transmission device is generally made of large-diameter steel in one piece. This results in a large amount of processing, high wear and tear, and frequent replacement during use, leading to a very high overall cost. Summary of the Invention

[0008] To address the shortcomings of existing technologies, the present invention aims to provide a split-lock bidirectional transmission device and its usage method for underground intermediate rod loading and unloading drilling rigs in coal mines, thereby solving the technical problems of short service life, low disassembly and replacement efficiency, and high overall cost of transmission devices for underground intermediate rod loading and unloading drilling rigs in coal mines in the present technology.

[0009] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0010] A split-locking bidirectional transmission device for a coal mine underground intermediate rod loading and unloading drilling rig includes a power shaft and a transmission shaft connected in sequence, with a locking device fitted on the outside of the power shaft and the transmission shaft.

[0011] The locking device includes a locking seat, which includes a hollow locking shaft. Two or more positioning chambers are radially arranged on the locking shaft at equal intervals in the circumferential direction. Each positioning chamber contains a positioning ball, which can move radially within the positioning chamber, and the radially inner side of the positioning ball can protrude into the locking shaft.

[0012] The power shaft includes a hollow power shaft body; the outer surface of the power shaft body is provided with an arc-shaped positioning groove; when the power shaft body is fitted into the locking shaft until the positioning chamber is radially aligned with the arc-shaped positioning groove, the radially inner side of the positioning ball can enter the arc-shaped positioning groove to realize the positioning and locking of the power shaft and the locking device.

[0013] The locking seat is fitted with an adjusting sleeve capable of circumferential rotation and axial movement. The adjusting sleeve includes a hollow adjusting shaft. A third positioning boss is provided on the rear part of the inner wall of the adjusting shaft. An arc-shaped limiting step is provided at the connection between the third positioning boss and the rear part of the inner wall of the adjusting shaft. The arc-shaped limiting step can restrict the radial movement of the positioning ball.

[0014] A limiting sleeve is installed on the front part of the outer wall of the locking shaft. The limiting sleeve is located inside the adjusting shaft. A spring is installed inside the adjusting shaft and fitted outside the locking shaft. One end of the spring abuts against the limiting sleeve, and the other end of the spring abuts against the third positioning boss.

[0015] The present invention also has the following technical features:

[0016] The inner wall of the adjusting shaft is provided with two or more first sector-shaped locking blocks arranged at equal intervals along the circumference; the limiting sleeve includes a hollow limiting shaft, the outer wall of the limiting shaft is provided with two or more second sector-shaped locking blocks arranged at equal intervals along the circumference, and the outer wall of the limiting shaft is also provided with two or more third sector-shaped locking blocks arranged at equal intervals along the circumference; the second sector-shaped locking blocks are located behind the third sector-shaped locking blocks; the number of the first, second, and third sector-shaped locking blocks is the same, and the first sector-shaped locking blocks can cooperate with the second and third sector-shaped locking blocks to block or misalign, thereby adjusting the front end stroke of the adjusting sleeve.

[0017] The locking shaft has a third male thread on the front of its outer wall, and the limiting shaft has a third female thread on its inner wall. The mating of the third male thread and the third female thread enables the connection between the locking shaft and the limiting shaft.

[0018] The outer wall of the locking shaft is provided with a second positioning boss that extends outward, which is used to limit the rear end travel of the adjusting sleeve.

[0019] The power shaft has a first male thread at its front end and a first female thread at its rear end. The mating of the first male thread and the first female thread enables a detachable connection and locking between the power shaft and the transmission shaft.

[0020] The rear end of the power shaft is provided with a flange that connects to the power head of the drilling rig; the flange is provided with a set of axially opened bolt holes arranged circumferentially, and the rear end face of the flange is provided with a sealing groove.

[0021] The drive shaft includes a hollow drive shaft body, and a positioning section is provided on the front outer side of the drive shaft body. The outer diameter of the positioning section is smaller than the outer diameter of the drive shaft body. The front inner wall of the locking shaft is provided with an inwardly extending first positioning boss. The first positioning boss is fitted on the positioning section. The first positioning boss is axially limited by the shoulder between the positioning section and the drive shaft body, so as to realize the limiting and locking of the drive shaft and the locking device.

[0022] The front end of the drive shaft is provided with a second male thread for connecting to the drill rod.

[0023] This invention also protects a method for using a split-lock bidirectional transmission device for an underground intermediate rod-loading drill rig in a coal mine, wherein the method employs the split-lock bidirectional transmission device for an underground intermediate rod-loading drill rig in a coal mine as described above.

[0024] Compared with the prior art, the present invention has the following technical effects:

[0025] (I) This invention adopts a split structure, quick threaded disassembly, axial locking to prevent loosening, and partial component replacement, etc., to realize bidirectional power transmission of the transmission device of the intermediate rod loading and unloading drilling rig in coal mines, while improving the service life of the transmission device, disassembly and replacement efficiency, and reducing the overall cost of use, thus providing a guarantee for the efficient intermediate rod loading and unloading construction of automated and intelligent drilling rigs.

[0026] (II) This invention enables bidirectional power transmission. Considering usage cost and replacement efficiency, the bidirectional transmission device adopts a split structure and a threaded connection. To address the issue that threaded connections can generally only transmit unidirectional rotational power and are prone to loosening when rotating in the opposite direction, a locking device is used to limit the thread loosening space between the power shaft and the transmission shaft, thus securing the power shaft and the transmission shaft together and achieving bidirectional power transmission.

[0027] (III) The present invention has a long service life. The bidirectional transmission device adopts a split structure, separating the power shaft and locking device that are not easily damaged from the transmission shaft that are easily damaged, reducing the proportion of vulnerable parts in the overall structure and improving the overall service life.

[0028] (IV) The present invention has a fast replacement speed. Each time the bidirectional transmission device is replaced, only the limit position of the locking device needs to be adjusted, and the connecting thread between the transmission shaft and the power shaft needs to be removed and installed. The disassembly and reinstallation speed is fast.

[0029] (V) The overall cost of this invention is low. Each time the bidirectional transmission device is damaged, only the transmission shaft needs to be replaced, avoiding a complete replacement; moreover, the transmission shaft has a simple structure and low cost, thereby reducing the cost of a single replacement and improving overall economic efficiency. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall cross-sectional structure of the split-locking bidirectional transmission device used in underground coal mine drilling rigs for adding and unloading rods.

[0031] Figure 2 This is a cross-sectional structural diagram of the drive shaft.

[0032] Figure 3 This is a cross-sectional structural diagram of the drive shaft.

[0033] Figure 4 This is a schematic diagram of the overall cross-sectional structure of the locking device.

[0034] Figure 5 This is a cross-sectional view of the locking seat.

[0035] Figure 6 yes Figure 5 A schematic diagram of the AA section structure.

[0036] Figure 7 This is a front sectional view of the adjusting sleeve.

[0037] Figure 8 This is a schematic diagram of the left-side structure of the adjustment sleeve.

[0038] Figure 9 This is a schematic diagram of the right-side structure of the adjustment sleeve.

[0039] Figure 10 This is a schematic diagram of the front sectional view of the limiting sleeve.

[0040] Figure 11 This is a schematic diagram of the left-side structure of the limiting sleeve.

[0041] Figure 12 This is a schematic diagram of the right-side structure of the limiting sleeve.

[0042] Figure 13This is a schematic diagram showing the connection and usage status of the bidirectional transmission device.

[0043] The labels in the diagram represent the following: 1-Power shaft, 2-Drive shaft, 3-Locker, 4-Drill rig, 5-Power head, 6-Drill rod, 7-Clamping device, 8-Two-way transmission device, 9-Drill bit, 10-Drill hole.

[0044] 101-Power shaft, 102-First male thread, 103-Arc-shaped positioning groove, 104-Flange, 105-Bolt hole, 106-Sealing groove.

[0045] 201-Drive shaft body, 202-Second male thread, 203-First female thread, 204-Positioning section.

[0046] 301-Locking seat, 302-Adjusting sleeve, 303-Positioning ball, 304-Limiting sleeve, 305-Spring.

[0047] 30101 - Locking shaft, 30102 - First positioning boss, 30103 - Second positioning boss, 30104 - Positioning chamber, 30105 - Third male thread.

[0048] 30201 - Adjustment shaft, 30202 - First sector-shaped locking block, 30203 - Arc-shaped limiting step, 30204 - Third positioning boss.

[0049] 30401 - Limiting shaft, 30402 - Second sector-shaped locking block, 30403 - Third sector-shaped locking block, 30404 - Third female thread.

[0050] The specific content of the present invention will be further explained in detail below with reference to the embodiments. Detailed Implementation

[0051] It should be noted that, unless otherwise specified, all components and devices in this invention are based on components and devices known in the prior art. For example, the drilling rig, power head, drill rod, chuck, and drill bit are all based on devices known in the art.

[0052] In view of the deficiencies given in the background art, this invention addresses the shortcomings of current split-lock bidirectional transmission devices for intermediate rod loading and unloading drills in coal mines, such as short service life, low disassembly and replacement efficiency, and high overall cost. It researches and designs a split-lock bidirectional transmission device and its usage method for intermediate rod loading and unloading drills in coal mines to overcome these deficiencies.

[0053] The bidirectional transmission device of this invention includes a power shaft and a drive shaft connected in sequence, and a locking device sleeved on the outside of the power shaft and the drive shaft. When in use, the locking device restricts the movement space between the power shaft and the drive shaft, which are then securely connected together. This transmits the forward and reverse rotational power of the drilling rig to the drill rod, thereby driving the drill bit to break rock and drill. When the drive shaft wears out, the locking device can be removed for quick replacement. This invention solves the problems of frequent drill rod loading and unloading in coal mine drilling rigs, such as easy wear of the drill rod threads, short service life, low disassembly and replacement efficiency, and high overall cost. It provides a guarantee for efficient intermediate drill rod loading and unloading operations in automated and intelligent drilling rigs.

[0054] The following are specific embodiments of the present invention. It should be noted that the present invention is not limited to the following specific embodiments. All equivalent modifications made based on the technical solutions of this application fall within the protection scope of the present invention.

[0055] Example 1:

[0056] This embodiment provides a split-type locking bidirectional transmission device for an underground coal mine intermediate rod loading and unloading drilling rig, such as... Figure 1 As shown, it includes a power shaft 1 and a transmission shaft 2 connected in sequence, and a locking device 3 is fitted on the outside of the power shaft 1 and the transmission shaft 2.

[0057] like Figure 4 As shown, the locker 3 includes a locking base 301, as... Figure 5 and Figure 6 As shown, the locking seat 301 includes a hollow locking shaft 30101, and two or more positioning chambers 30104 are radially arranged on the locking shaft 30101 at equal intervals in the circumferential direction; each positioning chamber 30104 is equipped with a positioning ball 303, which can move radially within the positioning chamber 30104, and the radially inner side of the positioning ball 303 can protrude into the locking shaft 30101.

[0058] like Figure 2 As shown, the power shaft 1 includes a hollow power shaft body 101; the outer surface of the power shaft body 101 is provided with an arc-shaped positioning groove 103; when the power shaft body 101 of the power shaft 1 is fitted into the locking shaft 30101 and the positioning chamber 30104 is radially aligned with the arc-shaped positioning groove 103, the radially inner side of the positioning ball 303 can enter the arc-shaped positioning groove 103 to realize the positioning and locking of the power shaft 1 and the locking device 3.

[0059] like Figure 4 As shown, an adjusting sleeve 302 capable of circumferential rotation and axial movement is fitted onto the locking seat 301, such as... Figure 7 , Figure 8 and Figure 9As shown, the adjusting sleeve 302 includes a hollow adjusting shaft 30201; a third positioning boss 30204 is provided on the rear part of the inner wall of the adjusting shaft 30201, and an arc-shaped limiting step 30203 is provided at the connection between the third positioning boss 30204 and the rear part of the inner wall of the adjusting shaft 30201. The arc-shaped limiting step 30203 can limit the radial movement of the positioning ball 303.

[0060] like Figure 4 As shown, a limiting sleeve 304 is installed on the front part of the outer wall of the locking shaft 30101. The limiting sleeve 304 is located inside the adjusting shaft 30201. A spring 305 is installed inside the adjusting shaft 30201 and fitted onto the outside of the locking shaft 30101. One end of the spring 305 abuts against the limiting sleeve 304, and the other end of the spring 305 abuts against the third positioning boss 30204.

[0061] In this embodiment, as Figure 5 and Figure 6 As shown, the positioning chamber 30104 has a bowl-shaped structure.

[0062] As one specific solution in this embodiment, such as Figure 7 , Figure 8 and Figure 9 As shown, the inner wall of the adjusting shaft 30201 is provided with two or more first sector-shaped locking blocks 30202 arranged at equal intervals along the circumference; as Figure 10 , Figure 11 and Figure 12 As shown, the limiting sleeve 304 includes a hollow limiting shaft 30401. Two or more second sector-shaped locking blocks 30402 are evenly spaced along the circumferential direction on the outer wall of the limiting shaft 30401. Two or more third sector-shaped locking blocks 30403 are also evenly spaced along the circumferential direction on the outer wall of the limiting shaft 30401. The second sector-shaped locking blocks 30402 are located behind the third sector-shaped locking blocks 30403. The number of first sector-shaped locking blocks 30202, second sector-shaped locking blocks 30402, and third sector-shaped locking blocks 30403 are the same. The first sector-shaped locking block 30202 can cooperate with the second sector-shaped locking blocks 30402 and the third sector-shaped locking blocks 30403 to block or misalign, thereby adjusting the front end stroke of the adjusting sleeve 302.

[0063] Further preferred, such as Figure 4 , Figure 5 and Figure 10 As shown, the outer wall of the locking shaft 30101 is provided with a third male thread 30105, and the inner wall of the limiting shaft 30401 is provided with a third female thread 30404. The cooperation of the third male thread 30105 and the third female thread 30404 realizes the detachable connection and locking of the locking shaft 30101 and the limiting shaft 30401.

[0064] As a preferred embodiment of this invention, such as Figure 4 and Figure 5 As shown, a second positioning boss 30103 extending outward is provided on the rear part of the outer wall of the locking shaft 30101. The second positioning boss 30103 is used to limit the rear end travel of the adjusting sleeve 302.

[0065] As a preferred embodiment of this invention, such as Figure 1 , Figure 2 and Figure 3 As shown, the front end of the power shaft 101 is provided with a first male thread 102, and the rear end of the transmission shaft 201 is provided with a first female thread 203. The mating installation of the first male thread 102 and the first female thread 203 realizes the connection between the power shaft 101 and the transmission shaft 201.

[0066] As a preferred embodiment of this invention, such as Figure 2 As shown, the rear end of the power shaft 101 is provided with a flange 104 that is connected to the power head 5 of the drilling rig 4; the flange 104 is provided with a set of axially opened bolt holes 105 in the circumferential direction, and the rear end face of the flange 104 is provided with a sealing groove 106.

[0067] As a preferred embodiment of this invention, such as Figure 3 and Figure 5 As shown, the drive shaft 2 includes a hollow drive shaft body 201. A positioning section 204 is provided on the front outer side of the drive shaft body 201. The outer diameter of the positioning section 204 is smaller than the outer diameter of the drive shaft body 201. A first positioning boss 30102 extending inward is provided on the front inner wall of the locking shaft 30101. The first positioning boss 30102 is fitted on the positioning section 204. The first positioning boss 30102 is axially limited by the shoulder between the positioning section 204 and the drive shaft body 201, thereby realizing the limiting and locking of the drive shaft 2 and the locking device 3.

[0068] As a preferred embodiment of this invention, such as Figure 3 The front end of the drive shaft 201 is provided with a second male thread 202 that connects to the drill rod 6.

[0069] In this embodiment, the first male thread 102, the first female thread 203, the second male thread 202, the third male thread 30105, and the third female thread 30404 are all positive threads.

[0070] Example 2:

[0071] This embodiment provides a method for using a split-lock bidirectional transmission device for an underground intermediate rod loading and unloading drill rig in a coal mine. The method adopts the split-lock bidirectional transmission device for an underground intermediate rod loading and unloading drill rig in a coal mine given in Embodiment 1.

[0072] like Figure 13 As shown, the usage method specifically includes the following steps:

[0073] Step 1, Installation of the drive shaft:

[0074] After installing a sealing gasket in the sealing groove 106 of the power shaft 1, the power shaft 1 is connected to the power head 5 of the drilling rig 4 using bolts.

[0075] Step 2, Installation and locking of the drive shaft:

[0076] First, connect the drive shaft 2 to the power shaft 1 via threads. Next, adjust the relative positions of the adjusting sleeve 302 and the limiting sleeve 304 of the locking device 3. Use the third sector-shaped locking block 30403 to block the first sector-shaped locking block 30202, preventing it from moving backward under the action of the spring 305. Then, insert the locking device 3 from the front end of the drive shaft 2 until it reaches the shoulder between the first positioning boss 30102 of the locking device 3 and the positioning section 204 of the drive shaft 2 and the drive shaft body 201. Tighten the locking device 3 so that the positioning chamber 30104 of the locking device 3 is aligned with the arc-shaped positioning groove 103 of the power shaft 1; then rotate the adjusting sleeve 302 to misalign the first sector-shaped locking block 30202 and the third sector-shaped locking block 30403. Under the action of the spring 305, the adjusting sleeve 302 is pushed back and tightened, and the positioning ball 303 is exposed from the positioning chamber 30104 and enters the arc-shaped positioning groove 103 of the power shaft 1; finally, rotate the adjusting sleeve 302 until the first sector-shaped locking block 30202 is blocked by the second sector-shaped locking block 30402.

[0077] Step 3, Using the bidirectional transmission device:

[0078] The bidirectional transmission device 8 is a split-locking bidirectional transmission device used in underground coal mine intermediate rod loading and unloading drilling rigs. The front end of the transmission shaft 2 is connected to the drill rod 6 by a thread. The bidirectional transmission device 8 cooperates with the power head 5 and the clamp 7 of the drilling rig 4 to load and unload the drill rod 6. The forward rotation power and feed and pulling power of the drilling rig 4 are transmitted to the bottom of the hole through the bidirectional transmission device 8 and the drill rod 6. The drill rod 6 drives the drill bit 9 to rotate and break the rock to carry out the drilling 10. During the use of the bidirectional transmission device 8, the power shaft 1 and the transmission shaft 2 always remain in a tight connection state.

[0079] Step 4, Replacement of the drive shaft:

[0080] When the second male thread 202 of the drive shaft 2 wears to the set threshold, firstly rotate the adjusting sleeve 302 until the first sector block 30202 is misaligned by the second sector block 30402, pull the adjusting sleeve 302 forward until the first sector block 30202 exceeds the third sector block 30403, rotate the adjusting sleeve 302, and use the third sector block 30403 to block the first sector block 30202, preventing the first sector block 30202 from moving backward under the action of the spring 305; secondly, after the adjusting sleeve 302 moves forward, the positioning ball 303 retracts from the positioning chamber 30104, the positioning ball 303 disengages from the arc-shaped positioning groove 103, and the locking device is removed; then disconnect the threaded connection between the drive shaft 2 and the power shaft 1, remove the drive shaft 2; repeat step two, install the new drive shaft 2 and lock it.

[0081] As a preferred embodiment, in step three, the bidirectional transmission device 8 is used in two working conditions: forward rotary transmission and reverse rotary transmission.

[0082] Forward rotary transmission operation:

[0083] When the drill rod 6 is installed or drilling is carried out, the power head 5 of the drilling rig 4 rotates in the forward direction, driving the power shaft 1 of the bidirectional transmission device 8 to rotate in the forward direction. The connecting thread between the power shaft 1 and the transmission shaft 2 is subjected to the tightening torque. The thread between the power shaft 1 and the transmission shaft 2 is already tightened, and under the action of the first positioning boss 30102 and the positioning ball 303 of the locking device 3, the power shaft 1 and the transmission shaft 2 continue to maintain a tight connection, and transmit the forward rotation power to the drill rod 6 connected to the transmission shaft 2, tightening the connecting thread between the transmission shaft 2 and the drill rod 6, or driving the bottom drill bit 9 to rotate and break the rock.

[0084] Reverse rotary transmission operation:

[0085] When disassembling drill rod 6, the power head 5 of the drilling rig 4 rotates in the reverse direction, driving the power shaft 1 of the bidirectional transmission device 8 to rotate in the reverse direction. The connecting thread between the power shaft 1 and the transmission shaft 2 is subjected to loosening torque, resulting in a tendency to disengage. Due to the action of the first positioning boss 30102 and the positioning ball 303 of the locking device 3, the power shaft 1 and the transmission shaft 2 lack loosening space and continue to maintain a tight connection. The reverse rotation power is transmitted to the drill rod 6 connected to the transmission shaft 2, thus disconnecting the connection between the transmission shaft 2 and the drill rod 6.

Claims

1. A split-type locking bidirectional transmission device for an underground coal mine intermediate rod loading and unloading drilling rig, characterized in that, It includes a power shaft (1) and a transmission shaft (2) connected in sequence, and a locking device (3) is fitted on the outside of the power shaft (1) and the transmission shaft (2). The locking device (3) includes a locking seat (301), which includes a hollow locking shaft (30101). Two or more positioning chambers (30104) are radially arranged on the locking shaft (30101) at equal intervals in the circumferential direction. A positioning ball (303) is installed in each positioning chamber (30104). The positioning ball (303) can move radially within the positioning chamber (30104), and the radial inner side of the positioning ball (303) can be exposed into the locking shaft (30101). The power shaft (1) includes a hollow power shaft body (101); the outer surface of the power shaft body (101) is provided with an arc-shaped positioning groove (103); the power shaft body (101) of the power shaft (1) is fitted into the locking shaft (30101) until the positioning chamber (30104) is radially aligned with the arc-shaped positioning groove (103), the radial inner side of the positioning ball (303) can enter the arc-shaped positioning groove (103) to realize the positioning and locking of the power shaft (1) and the locker (3); The locking seat (301) is fitted with an adjusting sleeve (302) capable of circumferential rotation and axial movement. The adjusting sleeve (302) includes a hollow adjusting shaft (30201). A third positioning boss (30204) is provided on the rear part of the inner wall of the adjusting shaft (30201). An arc-shaped limiting step (30203) is provided at the connection between the third positioning boss (30204) and the rear part of the inner wall of the adjusting shaft (30201). The arc-shaped limiting step (30203) can limit the radial movement of the positioning ball (303). A limiting sleeve (304) is installed on the front part of the outer wall of the locking shaft (30101). The limiting sleeve (304) is located inside the adjusting shaft (30201). A spring (305) is installed inside the adjusting shaft (30201) and fitted outside the locking shaft (30101). One end of the spring (305) abuts against the limiting sleeve (304), and the other end of the spring (305) abuts against the third positioning boss (30204). The inner wall of the adjusting shaft (30201) is provided with two or more first sector-shaped locking blocks (30202) arranged at equal intervals along the circumference; the limiting sleeve (304) includes a hollow limiting shaft (30401), the outer wall of the limiting shaft (30401) is provided with two or more second sector-shaped locking blocks (30402) arranged at equal intervals along the circumference, and the outer wall of the limiting shaft (30401) is also provided with two or more third sector-shaped locking blocks (30402) arranged at equal intervals along the circumference. 3) The second sector-shaped locking block (30402) is located behind the third sector-shaped locking block (30403); the number of the first sector-shaped locking block (30202), the second sector-shaped locking block (30402), and the third sector-shaped locking block (30403) is the same. The first sector-shaped locking block (30202) can cooperate with the second sector-shaped locking block (30402) and the third sector-shaped locking block (30403) to block or misalign, thereby adjusting the front end stroke of the adjusting sleeve (302). The outer wall of the locking shaft (30101) is provided with an outwardly extending second positioning boss (30103), which is used to limit the rear end travel of the adjusting sleeve (302). The power shaft (101) is provided with a first male thread (102) at its front end and a first female thread (203) at its rear end. The connection between the power shaft (101) and the transmission shaft (201) is achieved by the cooperation of the first male thread (102) and the first female thread (203).

2. The split-type locking bidirectional transmission device for underground coal mine intermediate rod loading and unloading drilling rig as described in claim 1, characterized in that, The locking shaft (30101) has a third male thread (30105) on the front of its outer wall, and the limiting shaft (30401) has a third female thread (30404) on its inner wall. The cooperation between the third male thread (30105) and the third female thread (30404) enables the locking shaft (30101) and the limiting shaft (30401) to be detachably connected and locked.

3. The split-type locking bidirectional transmission device for intermediate rod loading and unloading drilling rigs in coal mines as described in claim 1, characterized in that, The rear end of the power shaft (101) is provided with a flange (104) that is connected to the power head (5) of the drilling rig (4); the flange (104) is provided with a set of axially opened bolt holes (105) in the circumferential direction, and the rear end face of the flange (104) is provided with a sealing groove (106).

4. The split-type locking bidirectional transmission device for intermediate rod loading and unloading drilling rigs in coal mines as described in claim 1, characterized in that, The drive shaft (2) includes a hollow drive shaft body (201). A positioning section (204) is provided on the front outer side of the drive shaft body (201). The outer diameter of the positioning section (204) is smaller than the outer diameter of the drive shaft body (201). A first positioning boss (30102) extending inward is provided on the front inner wall of the locking shaft (30101). The first positioning boss (30102) is fitted on the positioning section (204). The first positioning boss (30102) is axially limited by the shoulder between the positioning section (204) and the drive shaft body (201), thereby realizing the limiting and locking of the drive shaft (2) and the locking device (3).

5. The split-type locking bidirectional transmission device for intermediate rod loading and unloading drilling rigs in coal mines as described in claim 1, characterized in that, The front end of the drive shaft (201) is provided with a second male thread (202) that connects to the drill rod (6).

6. A method for using a split-type locking bidirectional transmission device for an underground coal mine intermediate rod loading and unloading drilling rig, characterized in that, The method employs the split-lock bidirectional transmission device for underground intermediate rod loading and unloading drilling rigs in coal mines as described in any one of claims 1 to 5.

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