Variable stroke double-position sliding type automatic rod changing mechanism for coal mine and anchor rod drilling machine

Abstract

The application discloses a variable-stroke double-position sliding type automatic rod changing mechanism for coal mines and an anchor rod drilling machine. The automatic rod changing mechanism comprises a gripper, a rod changing mechanism, a sliding platform, a sliding oil cylinder and a gripper oil cylinder. The rod changing mechanism comprises a first rod changing device, a second rod changing device and a base. The first rod changing device and the second rod changing device are symmetrically arranged on the base and have the same structure. Each of the first rod changing device and the second rod changing device comprises a suspension rod, a U-shaped side plate, a support vertical plate, a gripper and a gripper oil cylinder. The U-shaped side plate and the support vertical plate are connected to the base. The outer side of the U-shaped side plate is fixed with the suspension rod. The inner side of the U-shaped side plate is connected with the gripper. The inner side of the support vertical plate is connected with the gripper oil cylinder. The gripper oil cylinder is connected to the gripper. The end of the sliding oil cylinder is hingedly connected to the sliding platform. The telescopic end of the sliding oil cylinder is connected to the base. The base is slidingly connected to the sliding platform.

Description

TECHNICAL FIELD

[0001] The present application relates to a variable stroke double-position sliding automatic rod changing mechanism for coal mine and an anchor rod drilling machine, and belongs to the technical field of coal mine tunneling and roadway supporting construction. BACKGROUND

[0002] At present, due to the space limitation of coal mine tunnels, the size and formation of the known anchor rod drilling machine for coal mine are relatively small, and the construction drilling stroke is generally less than 2 meters. When the drilling depth is greater than the drilling stroke of the drilling machine, only manual rod changing can be adopted. Since the anchor rod drilling machine construction can be realized in a 180-degree rotation in the horizontal and vertical space, manual rod changing is a relatively difficult and dangerous work in the construction process, and the construction intensity is large.

[0003] The structure of the existing anchor rod drilling machine, as shown in Figure 1 , includes a fixed base frame, a sliding frame, a drilling box, and a gripper. The anchor rod drilling machine mainly realizes two-stage sliding extension. The first-stage sliding extension includes: the sliding extension of the gripper, which is driven by the extension and retraction of the gripper oil cylinder; the sliding extension of the sliding frame, which is driven by the extension and retraction of the sliding frame oil cylinder. The second-stage sliding extension includes the sliding extension of the drilling box, which is driven by the drilling oil cylinder and chain transmission to realize the second-stage sliding. The stroke of each stage of the second-stage sliding is 800 mm, and the total stroke of the two stages can realize a drilling depth of 1.6 meters. After the two-stage retraction, the minimum transportation size of about 1.2 meters can be reached.

[0004] The construction drilling process is as follows: the gripper is extended to the drilling rod stroke position, the drilling rod is installed so that one end of the drilling rod is fitted into the driving joint of the drilling box, and the other end is clamped by the gripper clamp. Then the anchor rod drilling machine is extended to the specified hole position by the luffing jib, and the front end panel of the gripper is ensured to be on the tunnel wall. The clamp is loosened, the drilling box is rotated and moved forward to realize the drilling action. When back-rotating the drilling rod, the drilling rod is clamped or stuck by the drilling box or the gripper to retreat, and the drilling rod is pulled out. Without the automatic rod changing mechanism, all auxiliary actions are completed by manual operation, and the person needs to participate in the entire drilling process and complete the actions of rod installation, unlocking of the drilling rod, and lowering of the drilling rod. The work is dangerous and heavy.

[0005] Another commonly used method is to design a swing rod changing mechanism to rotate the drilling rod to the hole position by a rotating mechanism and cooperate with the clamping rotating mechanism to realize the changing of multiple rods. The swing rod changing mechanism can only be installed on the fixed base frame at the lowermost end of the structure to ensure the relative fixation of the rod changing position, so the height size of the structure needs to be large. In order to ensure the structural stiffness, the mass of the structure will be very large, and the mass of some swing rod changing mechanisms is even greater than the mass of the anchor rod drilling machine. In addition, due to the need for lateral swing to leave space for the drilling box, the lateral swing space required is also large. The swing type rod changing mechanism has poor structural stiffness, rotation accuracy and repeated positioning accuracy, and is not suitable for the narrow space of coal mine tunnels and the flexible construction needs of lightweight anchor rod drilling machines. SUMMARY

[0006] In order to solve the problems of the prior art, the present application provides a variable stroke double-position sliding type automatic rod changing mechanism for coal mines and an anchor rod drilling machine, which solves the problems of inconvenience in rod changing and large space occupied by the rod changing mechanism in the prior art.

[0007] In order to achieve the above-mentioned object, the present application adopts the following technical solution:

[0008] A variable stroke double-position sliding type automatic rod changing mechanism for coal mines comprises a gripper, a rod changing mechanism, a sliding platform, a sliding oil cylinder and a gripper oil cylinder.

[0009] The sliding platform is provided with a guide sleeve.

[0010] The rod changing mechanism comprises first and second rod changing devices and a base, and the first and second rod changing devices are symmetrically arranged on the base.

[0011] The first and second rod changing devices are identical in structure and each comprises a suspension rod, a U-shaped side plate, a support vertical plate, a gripper and a gripper oil cylinder.

[0012] The U-shaped side plate is connected to the base, the outer side of the U-shaped side plate is fixed with the suspension rod, the inner side of the U-shaped side plate is connected with the gripper, the inner side of the support vertical plate is connected with the gripper oil cylinder, and the gripper oil cylinder is connected to the gripper.

[0013] The end of the sliding oil cylinder is hingedly connected to the sliding platform, the extension end of the sliding oil cylinder is connected to the base, and the base is slidingly connected to the sliding platform.

[0014] Further, the sliding platform comprises an oil cylinder bottom plate, a left side plate, a connecting plate, a right side plate and a guide sleeve.

[0015] The connecting plate is connected to the left and right side plates, the bottom surface of the oil cylinder bottom plate is connected to the top surface of the left side plate, the side surface of the oil cylinder bottom plate is connected to the side surface of the right side plate, and the top end of the right side plate is further provided with the guide sleeve.

[0016] The upper surface of the oil cylinder bottom plate is provided with a wedge-shaped sliding groove.

[0017] Further, the sliding platform is provided with a wedge-shaped sliding groove, and the bottom of the base is provided with a wedge-shaped guide rail matched with the wedge-shaped sliding groove.

[0018] Further, the cantilever end of the suspension rod is provided with a U-shaped guide plate, the U-shaped guide plate is provided with a U-shaped opening, the U-shaped opening of the U-shaped guide plate is coaxially arranged with the central axis of the gripper, and the central axes of the gripper and the guide sleeve are located in the same plane.

[0019] Further, the U-shaped side plates and U-shaped guide plates are respectively connected with rubber clamping blocks, and the rubber clamping blocks are provided with U-shaped openings coaxial with the central axis of the clamping device.

[0020] Further, the sliding oil cylinder comprises a first stroke position and a second stroke position,

[0021] When the sliding oil cylinder is located at the first stroke position, the center of symmetry of the rod changing mechanism and the central axis of the guide sleeve are located in the same plane.

[0022] When the sliding oil cylinder is located at the second stroke position, the sliding oil cylinder is in a full extension state, and the clamping device on the second rod changing device is coaxial with the guide sleeve.

[0023] When the sliding oil cylinder is in an initial position, the sliding oil cylinder is in a full retraction state, and the clamping device on the first rod changing device is coaxial with the guide sleeve.

[0024] A rod drilling machine comprises a fixed base frame, a drilling box and the variable stroke double-position sliding automatic rod changing mechanism of any one of the preceding.

[0025] The drilling box is slidingly connected to the fixed base frame, and the drilling box is coaxial with the guide sleeve.

[0026] The fixed base frame is further provided with a rod changing mechanism guide rod, a first guide block and a telescopic sliding oil cylinder, one end of the telescopic sliding oil cylinder is fixedly connected to the fixed base frame, the other end of the telescopic sliding oil cylinder is connected to the rod changing mechanism, and the first guide block is fixedly connected to the fixed base frame.

[0027] Further, the sliding oil cylinder comprises a first stroke position and a second stroke position,

[0028] The second guide block is fixedly connected to the fixed base frame, the sliding oil cylinder is connected to the fixed base frame, and the sliding oil cylinder is connected to the fixed base frame.

[0029] Further, the sliding oil cylinder comprises a first stroke position and a second stroke position,

[0030] The drilling box is provided on the drilling box base, the drilling box base is provided on the drilling box guide rod, the two ends of the drilling box guide rod are respectively connected to the two ends of the sliding frame, the piston end of the drilling box oil cylinder is connected to the sliding frame, the cylinder end of the drilling box oil cylinder is connected with the chain wheels on both sides, the chain wheels are engaged with the chain tracks, and the chain tracks are fixedly connected to the lower plane of the drilling box base.

[0031] The present application has the following beneficial effects:

[0032] 1. The double-position positioning of the rod changing mechanism is realized by the sliding oil cylinder on the lower side of the rod changing mechanism, the double-position sliding is realized by the extension and retraction of the sliding oil cylinder, so that the automatic replacement, drilling and rod retraction of the two drill rods are realized, the automatic rod changing and automatic drilling are simple, reliable and practical, the extension and retraction of the sliding oil cylinder leaves the operation space of the drilling box, and the overall space occupied by the mechanism is smaller.

[0033] 2. The minimum and maximum strokes of the sliding oil cylinder correspond to the full retraction and full extension positions, so that the positioning is accurate, the repeat accuracy is high, and the control is simple and reliable.

[0034] 3. The automatic rod changing, drilling and rod retraction during the construction of multiple hole positions can be realized, manual rod connecting work is avoided, human resources are saved, construction danger is reduced, construction efficiency is improved, the structure is simple and reliable, the circulation of the two drill rods can be replaced, the effective space of the roadway is not occupied, and the weight is light. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 is a structural schematic view of an existing anchor rod drilling machine;

[0036] Figure 2 is a structural schematic view of the anchor rod drilling machine of the present application;

[0037] Figure 3 is a structural schematic view of the automatic rod changing mechanism of the present application;

[0038] Figure 4 is a schematic view of the oil cylinder bottom plate of the present application;

[0039] Figure 5 is a schematic view of the base of the present application;

[0040] Figure 6 is a schematic view of the first working position of the rod changing process of the anchor rod drilling machine of the present application;

[0041] Figure 7 is a schematic view of the second working position of the rod changing process of the anchor rod drilling machine of the present application;

[0042] Figure 8 is a schematic view of the third working position of the rod changing process of the anchor rod drilling machine of the present application;

[0043] Figure 9 is a schematic view of the fourth working position of the rod changing process of the anchor rod drilling machine of the present application;

[0044] Figure 10 is a schematic view of the fifth working position of the rod changing process of the anchor rod drilling machine of the present application;

[0045] Figure 11 is a schematic view of the sixth working position of the rod changing process of the anchor rod drilling machine of the present application;

[0046] Figure 12This is a schematic diagram of the seventh working position of the anchor bolt drilling rig in this invention;

[0047] Figure 13 This is a schematic diagram of the eighth working position of the anchor bolt drilling rig in this invention;

[0048] Figure 14 This is a schematic diagram of the ninth working position of the anchor bolt drilling rig in this invention;

[0049] Figure 15 This is a schematic diagram of the tenth working position of the anchor bolt drilling rig of the present invention;

[0050] Figure 16 This is a schematic diagram of the eleventh working position of the anchor bolt drilling rig of the present invention for changing the bolt;

[0051] Figure 17 This is a schematic diagram of the twelfth working position of the anchor bolt drilling rig in this invention;

[0052] Figure 18 This is a schematic diagram of the thirteenth working position of the anchor bolt drilling rig of the present invention;

[0053] Figure 19 This is a schematic diagram of the clamp installation of the present invention;

[0054] Figure 20 This is a schematic diagram of the chain drive mechanism of the present invention;

[0055] Figure 21 This is a side view of the anchor drilling machine structure of the present invention.

[0056] The meanings of the reference numerals in the attached figures are as follows: 1-Automatic rod changing mechanism; 2-Fixed base frame; 3-Drill box; 4-Slide; 8-Chain drive mechanism; 9-Telescopic sliding cylinder; 10-Slide cylinder; 11-Rubber clamping block; 12-Clamping device; 13-Rod changing mechanism; 14-Sliding platform; 15-Sliding cylinder; 16-Clamping device cylinder; 17-Rod changing mechanism guide rod; 18-First guide block; 19-Second guide block; 131-First rod changing device; 132-Second rod changing device; 133-Base; 134-U-shaped guide plate; 135-Suspension rod; 136-U-shaped side plate; 137-Wedge-shaped guide rail; 138-Bracket upright plate; 141-Cylinder base plate; 142-Left side plate; 143-Connecting plate; 144-Right side plate; 145-Guide sleeve; 146-Wedge-shaped slide groove; 147-Hinge seat; 31-Drill box drill sleeve; 41-Drill box guide rod; 42-Slide guide rod; 81-Drill box base; 82-Chain track; 83-Drill box cylinder; 84-Sprocket. Detailed Implementation

[0057] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments and specific features in the embodiments are detailed descriptions of the technical solution of the present application, rather than limitations thereof. In the absence of conflict, the embodiments and technical features in the embodiments can be combined with each other.

[0058] Example 1

[0059] This embodiment discloses a variable stroke double-position sliding automatic lever-changing mechanism for coal mines, such as... Figure 3 As shown, it includes a rubber gripper 12, a rod changing mechanism 13, a sliding platform 14, a sliding cylinder 15, and a gripper cylinder 16.

[0060] The sliding platform 14 includes a cylinder base plate 141, a left side plate 142, a connecting plate 143, a right side plate 144, and a guide sleeve 145. The connecting plate 143 is connected to the left side plate 142 and the right side plate 144 on both sides, the bottom surface of the cylinder base plate 141 is connected to the top surface of the left side plate 142, the side surface of the cylinder base plate 141 is connected to the side surface of the right side plate 144, and the top of the right side plate 144 is also provided with a guide sleeve 145.

[0061] like Figure 2 As shown, a guide rod 17 for a rod-changing mechanism is connected to the outer side of the left side plate 142, and the guide rod 17 is arranged within the fixed base frame 2. Figure 4 As shown, the cylinder base plate 141 has a hinge seat 147 and a transverse wedge-shaped groove 146. The fixed end of the sliding cylinder 15 is hinged to the hinge seat 147 of the cylinder base plate 141 by a pin, and the telescopic end of the sliding cylinder 15 is connected to the base 133. Figure 5 The base 133 has a wedge-shaped guide rail 137 at the bottom, which is installed in the wedge-shaped groove 146, allowing the base 133 to slide within the wedge-shaped groove 146.

[0062] Depend on Figure 3 It can be seen that the rod changing mechanism 13 includes a first rod changing device 131, a second rod changing device 132, and a base 133. The base 133 is fixedly connected to a sliding cylinder 15, which extends and retracts with the sliding cylinder 15. The first rod changing device 131 and the second rod changing device 132 are symmetrically arranged on the base 133. The first rod changing device 131 and the second rod changing device 132 have the same structure, both including a U-shaped guide plate 134, a suspension rod 135, a U-shaped side plate 136, a support plate 138, a clamp 12, and a clamp cylinder 16. The U-shaped side plate 136 and the support plate 138 are connected to the base 133. The suspension rod 135 is fixed to the outer side of the U-shaped side plate 136, and the clamp 12 is installed on the inner side of the U-shaped side plate 136. Figure 19As shown, the gripper 12 is driven by the gripper oil cylinder 16 mounted on the lower part, the gripper oil cylinder 16 is fixed on the support upright plate 138, the cylinder rod of the gripper oil cylinder 16 is connected with the gripper 12 by a pin, and the gripper oil cylinder 16 drives the gripper 12 to open and clamp by extension and retraction.

[0063] The cantilever end of the suspension rod 135 is provided with a U-shaped guide plate 134, and the U-shaped side plate 136 and the U-shaped guide plate 134 are further respectively connected with rubber clamping blocks 11, and the U-shaped side plate 136, the U-shaped guide plate 134 and the rubber clamping blocks 11 are all provided with U-shaped openings, and the U-shaped openings are consistent in direction, all pointing to the center position of the drilling hole of the drilling machine, so that it can be ensured that the rod changing mechanism 13 can smoothly return to the middle position without interference after the rod changing. In operation, the drill rod is clamped into the U-shaped side plate 136, the U-shaped guide plate 134 and the rubber clamping blocks 11 from the side of the U-shaped opening, and the gripper 12 clamps the drill rod under the drive of the gripper oil cylinder 16. Since the drilling machine can work at a plurality of angles, the gripper 12 may be loosened during the rod changing process, and therefore the rubber clamping blocks 11 are designed to assist in clamping, and the self-clamping force of the rubber clamping blocks 11 is used to prevent the drill rod from falling. Since the direction of the U-shaped opening is towards the center position of the drilling hole of the drilling machine, the rod changing mechanism can return to the middle position when the drill rod is sent to the center position, without being stuck or interfering.

[0064] The sliding oil cylinder 15 has two stroke positions, when the sliding oil cylinder 15 is located at the first stroke position, the rod changing mechanism 13 is in the middle position, that is, the middle axis of the rod changing mechanism 13 is located in the same plane as the middle axis of the guide sleeve 145, at this time the drilling of the drilling box can be carried out, since the first rod changing device 131 and the second rod changing device 132 are not centered with the guide sleeve 145, the drilling box can pass through the middle of the first rod changing device 131 and the second rod changing device 132, the entire stroke without interfering with the rod changing mechanism 13, in addition, the rod changing mechanism 13 can also be retracted for the transportation or transfer of the entire machine; when the sliding oil cylinder 15 is located at the second stroke position, the sliding oil cylinder 15 is in full extension state, at this time the second rod changing device 132 is centered with the guide sleeve 145, for the installation and removal of the drill rod by the second rod changing device 132; when the sliding oil cylinder 15 is in the initial position, the sliding oil cylinder 15 is in full retraction state, at this time the first rod changing device 131 is centered with the guide sleeve 145, for the installation and removal of the drill rod by the first rod changing device 131. Since the working positions of the second rod changing device 132 and the first rod changing device 131 correspond to the full extension and full retraction positions of the sliding oil cylinder 15 respectively, the positioning is accurate, the repeat accuracy is high, and the control is simple and reliable.

[0065] Example two

[0066] The embodiment discloses an anchor rod drilling machine, which comprises a fixed base frame 2, a drilling box 3, a sliding frame 4 and the automatic rod changing mechanism in the example one. Figure 2

[0067] As shown in the figure, the automatic rod changing mechanism comprises a first rod changing device 131, a second rod changing device 132, a guide sleeve 145, a sliding oil cylinder 15 and a gripper 12. Figure 2 ​As shown, the automatic rod changing mechanism 1 is connected to the fixed base frame 2 through the rod changing mechanism guide rod 17, the first guide block 18 is fixedly connected to the fixed base frame 2, the rod changing mechanism guide rod 17 is arranged in the first guide block 18, and one end of the rod changing mechanism guide rod 17 is connected to the left side plate 142. Figure 21 As shown, one end of the telescopic sliding oil cylinder 9 is fixedly connected to the fixed base frame 2, and the other end of the telescopic sliding oil cylinder 9 is connected to the automatic rod changing mechanism 1. The telescopic sliding oil cylinder 9 can drive the automatic rod changing mechanism 1 to move along the rod changing mechanism guide rod 17.

[0068] The sliding frame 4 is connected to the fixed base frame 2 through the sliding frame guide rod 42, the second guide block 19 is fixedly connected to the fixed base frame 2, the sliding frame guide rod 42 is arranged in the second guide block 19, and both ends of the sliding frame guide rod 42 are fixedly connected to both ends of the sliding frame 4. Figure 2 As shown, the telescopic sliding of the sliding frame 4 is driven by the sliding frame oil cylinder 10, one end of the sliding frame oil cylinder 10 is connected to the panel of the sliding frame 4, and the other end is fixed to the fixed base frame 2.

[0069] As shown, the telescopic sliding of the sliding frame 4 is driven by the sliding frame oil cylinder 10, one end of the sliding frame oil cylinder 10 is connected to the panel of the sliding frame 4, and the other end is fixed to the fixed base frame 2. Figure 20 As shown, the telescopic sliding of the drill box 3 is realized by the chain transmission mechanism 8, the chain transmission mechanism 8 includes a drill box base 81, a chain track 82, and a drill box oil cylinder 83, the drill box 3 is arranged on the drill box base 81, the drill box base 81 is arranged on the drill box guide rod 41 of the sliding frame 4, the drill box base 81 can slide forward and backward along the drill box guide rod 41, and both ends of the drill box guide rod 41 are respectively connected to the two end side plates of the sliding frame 4. The drill box oil cylinder 83 is a double-stage oil cylinder, the piston end of which is connected to the sliding frame 4, both sides of the cylinder body end of which are connected with chain wheels 84, the chain wheels 84 are engaged with the chain track 82, the chain track 82 is fixed to the drill box base 81, and when the drill box oil cylinder 83 telescopes, the chain track 82 is driven to slide by the chain wheels 84, and then the drill box base 81 is driven to move by the chain track 82. Because the weight of the gripper is heavy, the automatic rod changing mechanism 1 has a clamping function, and by replacing the anchor rod drilling machine gripper with a double-station rod changing mechanism 13, such an arrangement can reduce the overall machine weight, reduce redundant actions, and facilitate simplified control.

[0070] This embodiment takes an anchor rod drilling machine with a stroke of 1.6 meters as an example to illustrate the working process and rod changing method, which needs to clamp two 1.2-meter drill rods. When the anchor rod drilling machine is working:

[0071] I. Pre-work rod loading: the automatic rod changing mechanism 1 is driven by the telescopic sliding oil cylinder 9 to extend 400mm, the sliding oil cylinder 15 is located at the first stroke position, the rod changing mechanism 13 is located at the middle position, and the drill rods are respectively installed on the second rod changing device 132 and the first rod changing device 131, so that the front end of the drill rod extends 42mm out of the gripper 12, and the gripper 12 is clamped. As shown, Figure 6

[0072] ​II. Centering the first drill pipe: retract the slide cylinder 15 to the initial position, the first pipe changing device 131 is just in the centering position, so that the first drill pipe on the first pipe changing device 131, the drill box drill sleeve 31 and the guide sleeve 145 are coaxial. As shown in Figure 7 . .

[0073] III. Recognizing the pipe: the drill box 3 slowly moves forward and rotates, so that the drill pipe driving square head penetrates into the drill box drill sleeve 31, the clamp 12 is loosened, and the drill box 3 continues to move forward to drive the drill pipe into the front guide sleeve 145. As shown in Figure 8 . .

[0074] IV. Drilling the first drill pipe: extend the slide cylinder 15 to the first stroke position, the pipe changing mechanism 13 is in the center position, and the drill box 3 rotates forward to drill to the rear end of the first drill pipe, which is 61 mm away from the clamp 61. As shown in Figure 9 . .

[0075] V. Adding the second drill pipe: the drill box 3 retreats to the initial position, the slide cylinder 15 extends to the second stroke position (full extension state), the drill pipe on the second pipe changing device 132 is just in the center of the drilling hole, so that the second drill pipe on the second pipe changing device 132, the drill box drill sleeve 31 and the guide sleeve 145 are coaxial. Loosen the pipe changing mechanism clamp 12 slightly. The drill box 3 slowly moves forward and rotates forward until the two sections of pipes are connected, and the threaded connection between the two sections of pipes is completed through the rotation of the drill box. As shown in Figure 10 . .

[0076] VI. Drilling the second drill pipe: the pipe changing mechanism clamp 12 is fully opened, the slide cylinder 15 is retracted to the first stroke position, and the pipe changing mechanism 13 is in the center position. The drill box 3 drills to the rear end of the second drill pipe, which is 61 mm away from the clamp 61. As shown in Figure 11 . .

[0077] VII. Pipe withdrawal: the drill box reverses 30 degrees, locks the axial displacement of the drill pipe, retreats, pulls the second drill pipe, and drives the rear end of the first drill pipe to be 61 mm away from the clamp 61. As shown in Figure 12 . .

[0078] VIII. Removing the second drill pipe: the pipe changing mechanism 13 moves to the first pipe changing device 131, which is just in the centering position, and the pipe changing mechanism clamp 12 is clamped. As shown in Figure 13 . .

[0079] IX. Moving the second drill pipe to the center position: the drill box 3 reverses to unlock the threaded buckle, the drill box 3 retreats to move the second drill pipe after unlocking to the front end of the second drill pipe, which is 23 mm away from the pipe changing mechanism clamp 23. The pipe changing mechanism clamp 12 is clamped. The drill box rotates forward by 30 degrees, and the drill box retreats to the initial position. The pipe changing mechanism 13 slides to the center position. As shown in Figure 14 . .

[0080] X. The drill box advances to the front end, and the drill box 3 rotates forward to align the hole.Figure 15 Figure 7 shows.

[0081] Eleven, the first drill rod is pulled out: the drill box 3 is reversed and locked, the drill box 3 is pulled back and the first drill rod is pulled out to a position where the front end of the first drill rod is 42mm away from the gripper 12. The rod changing mechanism 13 is moved to the second rod changing device 132 which is just in the center position, the gripper 12 is clamped, and the drill box 3 is pulled back to the initial position. As shown in Figure 16 Figure 8 shows.

[0082] Twelve, the rod changing mechanism 13 is slid to the middle position, the drilling machine is moved to the next hole position for drilling. As shown in Figure 17 Figure 9 shows.

[0083] Thirteen, all drilling is completed, the rod changing mechanism 13 is in the middle position, and the automatic rod changing mechanism 1 is retracted to the transportation position. As shown in Figure 18 Figure 10 shows.

[0084] The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and modifications can be made, and these improvements and modifications should be considered as the protection scope of the present application.

Claims

1. A variable stroke, double-position sliding automatic lever-changing mechanism for coal mines, characterized in that, It includes a gripper (12), a rod changing mechanism (13), a sliding platform (14), a sliding cylinder (15), and a gripper cylinder (16). The sliding platform (14) is provided with a guide sleeve (145); The lever-changing mechanism (13) includes a first lever-changing device (131), a second lever-changing device (132), and a base (133). The first lever-changing device (131) and the second lever-changing device (132) are symmetrically arranged on the base (133). The first rod changing device (131) and the second rod changing device (132) have the same structure, both including a suspension rod (135), a U-shaped side plate (136), a support plate (138), a clamp (12) and a clamp cylinder (16). The U-shaped side plate (136) and the support plate (138) are connected to the base (133). The suspension rod (135) is fixed on the outer side of the U-shaped side plate (136). The clamp (12) is connected to the inner side of the U-shaped side plate (136). The clamp cylinder (16) is connected to the clamp (12). The U-shaped side plate (136) is provided with a U-shaped opening, the U-shaped opening faces the center of symmetry of the rod changing mechanism (13), the central axis of the U-shaped opening is coaxial with the central axis of the clamp (12), and the central axis of the clamp (12) and the central axis of the guide sleeve (145) are located in the same plane; The end of the sliding cylinder (15) is hinged to the sliding platform (14), and the telescopic end of the sliding cylinder (15) is connected to the base (133), which is slidably connected to the sliding platform (14).

2. The variable stroke double-position sliding automatic lever-changing mechanism for coal mines according to claim 1, characterized in that, The sliding platform (14) includes a cylinder base plate (141), a left side plate (142), a connecting plate (143), a right side plate (144), and a guide sleeve (145). The connecting plate (143) is connected to the left side plate (142) and the right side plate (144) on both sides respectively. The bottom surface of the cylinder base plate (141) is connected to the top surface of the left side plate (142). The side surface of the cylinder base plate (141) is connected to the side surface of the right side plate (144). The top of the right side plate (144) is also provided with a guide sleeve (145). The upper surface of the cylinder base plate (141) is provided with a wedge-shaped groove (146).

3. The variable stroke double-position sliding automatic lever-changing mechanism for coal mines according to claim 1, characterized in that, The sliding platform (14) is provided with a wedge-shaped groove (146), and the bottom of the base (133) is provided with a wedge-shaped guide rail (137) that is adapted to the wedge-shaped groove (146).

4. The variable stroke coal mine double-position sliding automatic lever changing mechanism according to claim 1, characterized in that, The cantilever end of the suspension rod (135) is provided with a U-shaped guide plate (134), and the U-shaped guide plate (134) is provided with a U-shaped opening. The U-shaped opening faces the center of symmetry of the rod changing mechanism (13), and the U-shaped opening on the U-shaped guide plate (134) is coaxial with the central axis of the clamp (12).

5. The variable stroke coal mine double-position sliding automatic lever changing mechanism according to claim 4, characterized in that, Rubber clamping blocks (11) are also connected to the U-shaped side plate (136) and the U-shaped guide plate (134), respectively. The rubber clamping block (11) is provided with a U-shaped opening, and the U-shaped opening on the rubber clamping block (11) is coaxially arranged with the central axis of the clamp (12).

6. The variable stroke double-position sliding automatic lever-changing mechanism for coal mines according to claim 1, characterized in that, The sliding cylinder (15) includes a first stroke position and a second stroke position. When the sliding cylinder (15) is in the first stroke position, the center of symmetry of the rod changing mechanism (13) and the central axis of the guide sleeve (145) are in the same plane; When the sliding cylinder (15) is in the second stroke position, the sliding cylinder (15) is in the fully extended state, and the clamp (12) on the second rod changing device (132) is coaxial with the guide sleeve (145); When the sliding cylinder (15) is in the initial position, the sliding cylinder (15) is in the fully retracted state, and the clamp (12) on the first rod changing device (131) is coaxial with the guide sleeve (145).

7. An anchor drilling machine, characterized in that, Includes a fixed base frame (2), a drill box (3), and a variable stroke double-position sliding automatic rod changing mechanism for coal mines as described in any one of claims 1-6; The drill box (3) is slidably connected to the fixed base frame (2), and the drill box (3) is coaxial with the guide sleeve (145); The fixed base frame (2) is also provided with a rod changing mechanism guide rod (17), a first guide block (18) and a telescopic sliding cylinder (9). One end of the telescopic sliding cylinder (9) is fixedly connected to the fixed base frame (2), and the other end of the telescopic sliding cylinder (9) is connected to the rod changing mechanism (13). The first guide block (18) is fixedly connected to the fixed base frame (2). The rod changing mechanism guide rod (17) is set in the guide block (18), and one end of the rod changing mechanism guide rod (17) is connected to the rod changing mechanism (13).

8. The anchor drilling rig according to claim 7, characterized in that, It also includes a carriage (4), a carriage cylinder (10), a second guide block (19), and a carriage guide rod (42). The second guide block (19) is fixedly connected to the fixed base frame (2). The slide guide rod (42) is set in the second guide block (19). The two ends of the slide guide rod (42) are fixedly connected to the two ends of the slide (4). One end of the slide cylinder (10) is connected to the slide (4), and the other end of the slide cylinder (10) is fixed to the fixed base frame (2).

9. The anchor drilling rig according to claim 8, characterized in that, It also includes a chain drive mechanism (8), which includes a drill box base (81), a chain track (82), a drill box cylinder (83) and a sprocket (84). The slide (4) is also provided with a drill box guide rod (41). The drill box (3) is set on the drill box base (81), the drill box base (81) is set on the drill box guide rod (41), the two ends of the drill box guide rod (41) are respectively connected to the two ends of the slide (4), the piston end of the drill box cylinder (83) is connected to the slide (4), the cylinder end of the drill box cylinder (83) is connected to both sides of the cylinder body, the sprocket (84) is engaged with the track (82), and the track (82) is fixedly connected to the lower plane of the drill box base (81).

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