Anti-loose connecting structure of drill rod of mine rock drill

Abstract

The utility model provides a kind of mine rock drill drill rod anti-loosening connection structure.It relates to the technical field of mining equipment.The mine rock drill drill rod anti-loosening connection structure includes rock drill connecting end and drill rod connecting end, the rock drill connecting end is close to the side of the drill rod connecting end and is provided with threaded hole slot, the threaded hole slot is screw-connected with threaded shaft, one end of the threaded shaft extends to the outside of the threaded hole slot and is fixedly connected with the drill rod connecting end, the drill rod connecting end is fixedly provided with positioning cover, the inner wall of the positioning cover is provided with anti-rotation ring groove, the outer wall of the rock drill connecting end is fixedly provided with four hollow sleeves arranged in annular array, the side away from the rock drill connecting end of four hollow sleeves is slidably provided with limiting block.The utility model has the advantages of good anti-loosening effect, and basically does not affect the operating efficiency and safety performance.

Description

Technical Field

[0001] This utility model relates to the field of mining equipment technology, specifically to a drill rod anti-loosening connection structure for a mining rock drill. Background Technology

[0002] In mining operations, rock drills are one of the most commonly used pieces of equipment. They drill holes in the rock using drill rods. Typically, the drill rods are fixed to the connection end of the rock drill with bolts, or external threads are opened at the end of the drill rods, which are then screwed directly into the threaded hole at the connection end of the rock drill to achieve a fixed effect.

[0003] However, in actual use, the connection between the drill rod and the rock drill is not loose enough. The high-frequency vibration and impact generated by the rock drill during operation, as well as the rotation of the drill rod itself, can easily cause the connection between the drill rod and the rock drill to loosen or even separate. This phenomenon not only affects the efficiency of drilling operations and hinders the construction progress, but may also cause safety accidents and threaten the lives of operators.

[0004] Therefore, it is necessary to provide a new anti-loosening connection structure for mine rock drill rods to solve the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this utility model is to provide a mining rock drill rod anti-loosening connection structure with good anti-loosening effect and basically no impact on operation efficiency and safety performance.

[0006] To solve the above-mentioned technical problems, the present invention provides a drilling rod anti-loosening connection structure for a mining rock drill, comprising: a rock drill connection end and a drilling rod connection end. A threaded groove is provided on the side of the rock drill connection end near the drilling rod connection end. A threaded shaft is screwed into the threaded groove, and one end of the threaded shaft extends outside the threaded groove and is fixedly connected to the drilling rod connection end. A positioning sleeve cover is fixedly fitted on the drilling rod connection end. An anti-rotation ring groove is provided on the inner wall of the positioning sleeve cover. Four hollow sleeves arranged in a circular array are fixedly installed on the outer ring wall of the rock drill connection end. Limiting blocks are slidably installed on the side of each of the four hollow sleeves away from the rock drill connection end. The side of each of the four limiting blocks away from the rock drill connection end extends into the anti-rotation ring groove. One end of a compression spring is fixedly installed on the inner wall of each of the four hollow sleeves near the rock drill connection end. The end of each of the four compression springs away from the rock drill connection end is fixedly connected to the corresponding limiting block.

[0007] Preferably, each of the four limiting blocks has a locking hole on the side away from the drill rod connecting end, and each of the four hollow sleeves has a mating hole on the side away from the drill rod connecting end. The four mating holes are horizontally corresponding to the four locking holes. Four connecting arms arranged in a circular array are fixedly installed on the outer ring wall of the rock drill connecting end. Each of the four connecting arms has a locking rod slidably installed on it. The ends of the four locking rods near the drill rod connecting end are respectively inserted into the four locking holes, and the four locking rods pass through the four mating holes and are mated with the corresponding locking holes. The inner wall of the corresponding mating hole is in contact. Four annular grooves are provided on the outer ring wall of the rock drill connecting end. Wedge-shaped chucks are fixedly installed on the inner wall of the four annular grooves away from the drill rod connecting end. Positioning baffles are fixedly installed on the ends of the four locking rods away from the drill rod connecting end. Sliding heads are slidably installed on the four positioning baffles. Elastic locking strips are fixedly installed on the ends of the four sliding heads near the rock drill connecting end. The four elastic locking strips are respectively inserted into the four annular grooves and engaged with the corresponding wedge-shaped chucks.

[0008] Preferably, an anti-loosening washer is fitted on the threaded shaft, and the two sides of the anti-loosening washer abut against the rock drill connection end and the drill rod connection end, respectively.

[0009] Preferably, the anti-loosening washer is made of rubber.

[0010] Preferably, the side of each of the four limiting blocks away from the rock drill connection end is provided as an inclined side, and the inner edge of the positioning sleeve cover near the rock drill connection end is provided with an annular inclined surface, which is adapted to the inclined side. Each of the four hollow sleeves is slidably installed with a pull lug on the side away from the drill rod connection end, and one side of each of the four pull lugs is fixedly connected to the four limiting blocks respectively.

[0011] Preferably, each of the four locking rods is fixedly fitted with a collar, and each of the four locking rods is fitted with a return spring. One end of the return spring is fixedly connected to the collar, and the other end is fixedly connected to the connecting arm.

[0012] Preferably, the elastic clip is made of spring steel.

[0013] Compared with related technologies, the anti-loosening connection structure for mining rock drill rods provided by this utility model has the following beneficial effects:

[0014] This invention, through the cooperation of the limiting block 9 and the anti-rotation ring groove 6, effectively restricts the rotation of the drill rod relative to the rock drill after the threaded shaft 4 is screwed into the threaded hole groove 3, greatly improving the stability of the connection. Furthermore, with the cooperation of the anti-loosening washer, the stable connection effect is further improved, and the loosening and unlocking effect is better, improving the safety performance and work efficiency of the drill rod during operation. In addition, by using the locking rod 12 to insert into the locking hole 10, the limiting block 9 can be stably locked in the anti-rotation ring groove 6, further improving the stability of the connection between the drill rod and the rock drill. Attached Figure Description

[0015] Figure 1 A schematic diagram of the anti-loosening connection structure for the drill rod of a mining rock drill provided by this utility model;

[0016] Figure 2 This is a schematic diagram of the disassembled state of this utility model;

[0017] Figure 3 This is a schematic diagram of the threaded slot in this utility model;

[0018] Figure 4 This is a cross-sectional view of the positioning sleeve cover in this utility model;

[0019] Figure 5 This is a cross-sectional view of one of the hollow sleeves in this utility model;

[0020] Figure 6 This is a partial cross-sectional view of the connection end of the rock drill in this utility model;

[0021] Figure 7 This is a schematic diagram of the connection structure between the connecting arm and the locking rod in this utility model.

[0022] The following are the labels in the diagram: 1. Rock drill connection end; 2. Drill rod connection end; 3. Threaded hole groove; 4. Threaded shaft; 5. Positioning sleeve cover; 6. Anti-rotation ring groove; 7. Hollow sleeve; 8. Compression spring; 9. Limiting block; 10. Locking hole; 11. Connecting arm; 12. Locking rod; 13. Collar; 14. Return spring; 15. Annular groove; 16. Wedge-shaped chuck; 17. Positioning folding plate; 18. Sliding head; 19. Elastic locking strip. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] Please refer to the following: Figures 1-7The anti-loosening connection structure for a mining rock drill includes a rock drill connecting end 1 and a drill rod connecting end 2. A threaded groove 3 is provided on the side of the rock drill connecting end 1 near the drill rod connecting end 2. A threaded shaft 4 is screwed into the threaded groove 3, with one end extending out of the threaded groove 3 and fixedly connected to the drill rod connecting end 2. This establishes a preliminary connection between the drill rod and the rock drill. A rubber anti-loosening washer is fitted onto the threaded shaft 4, with both sides of the washer abutting against the rock drill connecting end 1 and the drill rod connecting end 2, thus improving the stability of the connection between them. To further enhance the connection stability, a positioning sleeve 5 is fixedly fitted onto the drill rod connecting end 2, with an anti-rotation groove on its inner wall. 6. Four hollow sleeves 7 arranged in a ring array are fixedly installed on the outer ring wall of the rock drill connection end 1. Limiting blocks 9 are slidably installed on the side of each hollow sleeve 7 away from the rock drill connection end 1. The side of each limiting block 9 away from the rock drill connection end 1 extends into the anti-rotation ring groove 6. One end of each compression spring 8 is fixedly installed on the inner wall of each hollow sleeve 7 near the rock drill connection end 1. The end of each compression spring 8 away from the rock drill connection end 1 is fixedly connected to the corresponding limiting block 9. The locking relationship between the limiting block 9 and the anti-rotation ring groove 6 makes the connection between the drill rod and the rock drill more stable. In addition, the compression spring 8 itself is a spring with a large stiffness coefficient, which can withstand a large external force, so that the limiting block 9 is stably inserted into the anti-rotation ring groove 6.

[0025] In the above method, to further ensure the stable locking between the limiting block 9 and the anti-rotation ring groove 6, locking holes 10 are provided on the side of each of the four limiting blocks 9 away from the drill rod connecting end 2, and mating holes are provided on the side of each of the four hollow sleeves 7 away from the drill rod connecting end 2. The four mating holes are horizontally corresponding to the four locking holes 10. Four connecting arms 11 arranged in a ring array are fixedly installed on the outer ring wall of the rock drill connecting end 1. Locking rods 12 are slidably installed on each of the four connecting arms 11. The ends of the four locking rods 12 near the drill rod connecting end 2 are respectively inserted into the four locking holes 10, and the four locking rods 12 respectively penetrate the four mating holes and contact the inner wall of the corresponding mating holes. Four annular grooves 15 arranged in a circular array are provided on the outer wall of the connecting end 1. Wedge-shaped chucks 16 are fixedly installed on the inner wall of the four annular grooves 15 away from the drill rod connecting end 2. Positioning baffles 17 are fixedly installed on the ends of the four locking rods 12 away from the drill rod connecting end 2. Sliding heads 18 are slidably installed on the four positioning baffles 17. Elastic locking strips 19 are fixedly installed on the ends of the four sliding heads 18 near the rock drill connecting end 1. The four elastic locking strips 19 are respectively inserted into the four annular grooves 15 and engaged with the corresponding wedge-shaped chucks 16. The elastic locking strips 19 are made of spring steel and have strong rigidity. They will not easily deform, ensuring that the locking rods 12 are stably inserted into the locking holes 10.

[0026] In this method, in order to facilitate the locking of the limiting block 9 into the anti-rotation ring groove 6, each of the four limiting blocks 9 is provided with an inclined side on the side away from the rock drill connection end 1. The inner edge of the positioning sleeve cover 5 near the rock drill connection end 1 is provided with an annular inclined surface, which is adapted to the inclined side. In addition, each of the four hollow sleeves 7 is slidably installed with a pull lug on the side away from the drill rod connection end 2. One side of each of the four pull lugs is fixedly connected to the four limiting blocks 9, which makes it convenient to remove the limiting blocks 9 from the anti-rotation ring groove 6 when the rock drill connection end 1 and the drill rod connection end 2 are removed.

[0027] In this method, after the locking rod 12 is moved out of the locking hole 10, in order to prevent it from interfering with the next operation, a collar 13 is fixedly sleeved on each of the four locking rods 12, and a return spring 14 is sleeved on each of the four locking rods 12. One end of the return spring 14 is fixedly connected to the collar 13, and the other end is fixedly connected to the connecting arm 11. When the elastic locking strip 19 is moved out of the annular groove 15, the return spring 14 automatically pulls the locking rod 12 out of the locking hole 10, and the return spring 14 provides a locking effect, so that the locking rod 12 stays stably to the side and does not hinder the operation of pulling the limit block 9.

[0028] The working principle of the anti-loosening connection structure for the drill rod of the mining rock drill provided by this utility model is as follows:

[0029] In the initial state, the return spring 14 is in a stretched state;

[0030] During the use of the drill rod, the helical connection of the threaded shaft 4 and the threaded groove 3 makes the rock drill connection end 1 and the drill rod connection end 2 form a stable and detachable connection. Furthermore, under the restriction of the limiting block 9 and the anti-rotation ring groove 6, the rock drill connection end 1 and the drill rod connection end 2 are in a relatively locked state, and the two will not rotate relative to each other, ensuring a stable connection.

[0031] When it is necessary to disconnect the rock drill connection end 1 and the drill rod connection end 2, first press one of the elastic clips 19 to separate it from the wedge-shaped chuck 16, and then push it out from the corresponding annular groove 15. The stretched return spring 14 will automatically bring the corresponding locking rod 12 out of the corresponding locking hole 10. Then, in the same way, move the remaining locking rods 12 out of their respective locking holes 10. Then, press the four pull ears at the same time to bring the four limit blocks 9 out of the anti-rotation annular groove 6. Then rotate the drill rod and gradually bring the threaded shaft 4 into the threaded hole groove 3 and screw it out until the rock drill connection end 1 and the drill rod connection end 2 are separated.

[0032] When connecting the drill rod connection end 2 to the rock drill connection end 1, the threaded shaft 4 is aligned with the threaded hole groove 3 and screwed in. During the screwing process, when the annular inclined surface of the inner edge of the positioning sleeve cover 5 contacts the inclined edge of the limit block 9, the two abut against each other, and the limit block 9 is automatically retracted. At this time, the compression spring 8 is in a deeply compressed state until the threaded shaft 4 is screwed into place. The limit block 9 corresponds to the anti-rotation ring groove 6, and the compressed spring 8 rebounds, automatically bringing the limit block 9 into the anti-rotation ring groove 6, thereby forming a locking effect.

[0033] Then, press one of the positioning plates 17, causing it and the corresponding locking rod 12 to move towards the corresponding limiting block 9. When it is engaged in the corresponding locking hole 10, press the corresponding slider 18, causing the elastic locking strip 19 to abut against the corresponding wedge-shaped locking head 16. The elastic locking strip 19 deforms first, and after the locking head on it and the wedge-shaped locking head 16 intersect, it springs back, thus forming a locking effect. At this time, under the action of the locking rod 12, the limiting block 9 is stably locked in the anti-rotation ring groove 6, which plays a role in stabilizing the locking. Then, operate the remaining locking rods 12 in the same way.

[0034] Compared with related technologies, the anti-loosening connection structure for mining rock drill rods provided by this utility model has the following beneficial effects:

[0035] This utility model provides a drill rod anti-loosening connection structure for a mining rock drill. Through the cooperation of the limiting block 9 and the anti-rotation ring groove 6, when the threaded shaft 4 is screwed into the threaded hole groove 3, the rotation of the drill rod relative to the rock drill is effectively restricted, which greatly improves the stability of the connection. Furthermore, with the cooperation of the anti-loosening washer, the stable connection effect is further improved, and the loosening effect is better, which improves the safety performance and work efficiency of the drill rod during operation. In addition, by using the locking rod 12 to insert into the locking hole 10, the limiting block 9 can be stably locked in the anti-rotation ring groove 6, which further improves the stability of the connection between the drill rod and the rock drill.

[0036] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A drill rod anti-loosening connection structure for a mining rock drill, comprising a rock drill connection end and a drill rod connection end, characterized in that, A threaded slot is provided on the side of the rock drill connecting end near the drill rod connecting end. A threaded shaft is screwed into the threaded slot. One end of the threaded shaft extends out of the threaded slot and is fixedly connected to the drill rod connecting end. A positioning sleeve cover is fixedly fitted on the drill rod connecting end. An anti-rotation ring groove is provided on the inner wall of the positioning sleeve cover. Four hollow sleeves arranged in a ring array are fixedly installed on the outer ring wall of the rock drill connecting end. A limit block is slidably installed on the side of each of the four hollow sleeves away from the rock drill connecting end. The side of each of the four limit blocks away from the rock drill connecting end extends into the anti-rotation ring groove. One end of a compression spring is fixedly installed on the inner wall of each of the four hollow sleeves near the rock drill connecting end. The end of each of the four compression springs away from the rock drill connecting end is fixedly connected to the corresponding limit block.

2. The anti-loosening connection structure for mine rock drill rods according to claim 1, characterized in that, Each of the four limiting blocks has a locking hole on the side away from the drill rod connection end, and each of the four hollow sleeves has a mating hole on the side away from the drill rod connection end. The four mating holes are horizontally corresponding to the four locking holes. Four connecting arms arranged in a circular array are fixedly installed on the outer ring wall of the rock drill connection end. Each of the four connecting arms has a locking rod slidably installed on it. The ends of the four locking rods near the drill rod connection end are inserted into the four locking holes, and the four locking rods pass through the four mating holes and are mated with the corresponding locking holes. The inner wall of the drilling machine connection end is in contact with the inner wall of the hole. Four annular grooves are arranged in a circular array on the outer wall of the connection end of the rock drill. Wedge-shaped chucks are fixedly installed on the inner wall of each of the four annular grooves away from the connection end of the drill rod. Positioning baffles are fixedly installed on the ends of the four locking rods away from the connection end of the drill rod. Sliding heads are slidably installed on the four positioning baffles. Elastic locking strips are fixedly installed on the ends of the four sliding heads near the connection end of the rock drill. The four elastic locking strips are respectively inserted into the four annular grooves and engaged with the corresponding wedge-shaped chucks.

3. The anti-loosening connection structure for mine rock drill rods according to claim 1, characterized in that, An anti-loosening washer is fitted on the threaded shaft, and the two sides of the anti-loosening washer abut against the rock drill connection end and the drill rod connection end, respectively.

4. The anti-loosening connection structure for mine rock drill rods according to claim 3, characterized in that, The anti-loosening washer is made of rubber.

5. The anti-loosening connection structure for mine rock drill rods according to claim 1, characterized in that, The four limiting blocks are all provided with an inclined side on the side away from the rock drill connection end. The positioning sleeve cover has an annular inclined surface on the inner edge of the side near the rock drill connection end. The annular inclined surface is adapted to the inclined side. The four hollow sleeves are all slidably installed with pull lugs on the side away from the drill rod connection end. One side of each of the four pull lugs is fixedly connected to the four limiting blocks.

6. The anti-loosening connection structure for mine rock drill rods according to claim 2, characterized in that, Each of the four locking rods is fixedly fitted with a collar, and each of the four locking rods is fitted with a return spring. One end of the return spring is fixedly connected to the collar, and the other end is fixedly connected to the connecting arm.

7. The anti-loosening connection structure for mine rock drill rods according to claim 2, characterized in that, The elastic clip is made of spring steel.

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