A disc brake for a coal mine drilling rig

Abstract

The utility model provides a kind of coal mine drilling machine disc brake, comprising: brake spindle;Round slip, the round slip is set to the outside of brake spindle;Pressing plate, the pressing plate is set to the outside of round slip;Brake piston, the brake piston is set to the outside of pressing plate.The utility model provides a kind of coal mine drilling machine disc brake, by adopting four groups of round slip structure of symmetrical arrangement, cooperate hydraulic drive mode, the uniform output of braking torque is realized, effectively solve the problem of traditional axle-holding type brake braking torque deficiency, uneven stress, hydraulic drive mechanism lets brake and loosening action switch quickly, response is more sensitive, can accurately adapt to the diversification needs of frequent start-stop, angle adjustment etc. in complex operation in coal mine, meet the stringent requirements of different coal seam geological conditions to the positioning accuracy and operating stability of drilling machine.

Description

Technical Field

[0001] This utility model relates to the field of braking equipment for coal mine machinery, and in particular to a disc brake for coal mine drilling rigs. Background Technology

[0002] Tracked, fully hydraulic directional drilling rigs for coal mines are core equipment for underground operations, indispensable in directional drilling for critical projects such as gas drainage, grouting for fire prevention and extinguishing, coal seam water injection, and geological structure exploration. The brake, as a core component ensuring the safe and stable operation of this type of drilling rig, directly determines its operating efficiency, precision, and safety, and is a crucial guarantee for the smooth progress of underground construction.

[0003] In the actual mining environment of underground coal mines, drilling rigs need to frequently start and brake to adapt to the complex and ever-changing operational needs such as drilling angle adjustment, position movement, and emergency shutdown. At the same time, different geological conditions of coal seams place stringent requirements on the movement accuracy and positioning stability of drilling rigs, which makes the brakes have stable braking force output, precise control response, and reliable adaptability to working conditions.

[0004] Currently, the widely used shaft-mounted brake in the industry has significant technical limitations. It adopts a symmetrically distributed slip structure, which drives the slips to grip the brake main shaft through mechanical force, relying on the friction between the two to achieve braking. However, this structure has relatively small braking force and insufficient stability, with large fluctuations in braking force under different loads and operating conditions, making it difficult to meet the requirements of high-precision positioning. In addition, the brake shoes wear out quickly, requiring frequent shutdowns for replacement, which not only increases maintenance costs but also seriously affects the continuity of construction. The structure is highly enclosed, making it difficult to effectively dissipate the heat generated by friction during braking, resulting in heat concentration and easy adhesion between the slips and the brake main shaft, which in turn causes a sudden drop in braking torque or even complete failure, posing a great safety hazard to downhole operations.

[0005] Therefore, it is necessary to provide a disc brake for coal mine drilling rigs to solve the above-mentioned technical problems. Utility Model Content

[0006] This utility model provides a disc brake for coal mine drilling rigs, which solves the problems of unstable braking force, rapid wear, and poor heat dissipation of existing shaft-type brakes.

[0007] To solve the above-mentioned technical problems, this utility model provides a disc brake for coal mine drilling rigs, comprising:

[0008] Braking spindle;

[0009] A circular collet is disposed on the outer side of the brake spindle;

[0010] A pressure plate, wherein the pressure plate is disposed on the outer side of the circular clamp;

[0011] A brake piston, wherein the brake piston is disposed on the outer side of the pressure plate;

[0012] A chuck ring, wherein the chuck ring is disposed at one end of the brake spindle;

[0013] Brake copper sleeve, the brake copper sleeve is disposed on the outer side of the brake piston;

[0014] A brake housing is disposed on the outer side of the brake copper sleeve.

[0015] Preferably, a brake transition sleeve is provided at one end of the brake housing, and a brake rear cover is provided at one end of the brake transition sleeve.

[0016] Preferably, the brake rear cover is fixedly installed by bolts and the chuck ring.

[0017] Preferably, two through connectors are fixedly installed on the side of the brake housing.

[0018] Preferably, it also includes a spiral channel, which is opened inside the brake housing, and the output end and input end of the spiral channel are respectively fixedly installed with a water outlet connector and a water inlet connector.

[0019] Preferably, both the water outlet connector and the water inlet connector are fixedly installed on the side of the brake housing.

[0020] Preferably, a support ring is threaded onto the inner side of the water inlet connector, a filter screen is fixedly installed on the inner side of the support ring, and a retaining ring is also fixedly installed on the inner side of the water inlet connector, with the retaining ring positioned at the top of the support ring.

[0021] Compared with related technologies, the disc brake for coal mine drilling rigs provided by this utility model has the following advantages:

[0022] This utility model provides a disc brake for coal mine drilling rigs. By adopting a symmetrical arrangement of four sets of circular slips and a hydraulic drive, it achieves uniform output of braking torque, effectively solving the problems of insufficient braking torque and uneven force distribution of traditional axle-type brakes. The hydraulic drive mechanism allows for rapid switching between braking and releasing actions, resulting in a more sensitive response. It can accurately adapt to the diverse needs of frequent start-stop and angle adjustment in complex underground coal mine operations, and meet the stringent requirements of different coal seam geological conditions for drilling rig positioning accuracy and operational stability.

[0023] Meanwhile, this structural design reduces abnormal wear between the circular slip and the brake spindle, reduces the risk of component adhesion caused by concentrated frictional heat, thereby significantly reducing the probability of sudden drop or failure of braking torque and significantly improving the safety of downhole operations.

[0024] Furthermore, the reduced frequency of replacement of vulnerable parts not only lowers equipment maintenance costs but also reduces construction interruptions caused by downtime for maintenance, ensuring the continuity of coal mine drilling operations. It is also better suited to the feed braking requirements of drilling rigs under complex working conditions, providing reliable braking guarantees for efficient and safe underground construction in coal mines. Attached Figure Description

[0025] Figure 1 A schematic diagram of the structure of a first embodiment of a disc brake for a coal mine drilling rig provided by this utility model;

[0026] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure at point AA is shown.

[0027] Figure 3 for Figure 1 The diagram shown is a schematic of the brake spindle structure.

[0028] Figure 4 for Figure 2 The diagram shows the side structure of the brake piston.

[0029] Figure 5 for Figure 2 The diagram shows the three-dimensional structure of the chuck ring.

[0030] Figure 6 for Figure 2 The diagram shows the side structure of the brake rear cover.

[0031] Figure 7 for Figure 2 The diagram shows the side structure of the pressure plate.

[0032] Figure 8 A schematic diagram of the second embodiment of a disc brake for a coal mine drilling rig provided by this utility model;

[0033] Figure 9 for Figure 8 The diagram shows a cross-sectional view of the water inlet connector.

[0034] The following are the labels in the diagram: 1. Brake spindle, 2. Brake copper sleeve, 3. Brake housing, 4. Straight connector, 5. Brake transition sleeve, 6. Brake rear cover, 7. Brake piston, 8. Round slip, 9. Pressure plate, 10. Chuck ring, 11. Spiral channel, 12. Water inlet connector, 13. Water outlet connector, 14. Support ring, 15. Filter screen, 16. Retaining ring. Detailed Implementation

[0035] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0036] First Embodiment

[0037] Please refer to the following: Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 ,in, Figure 1 A schematic diagram of the structure of a first embodiment of a disc brake for a coal mine drilling rig provided by this utility model; Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure at point AA is shown. Figure 3 for Figure 1 The diagram shown is a schematic of the brake spindle structure. Figure 4 for Figure 2 The diagram shows the side structure of the brake piston. Figure 5 for Figure 2 The diagram shows the three-dimensional structure of the chuck ring. Figure 6 for Figure 2 The diagram shows the side structure of the brake rear cover. Figure 7 for Figure 2 The diagram shows the side structure of the pressure plate.

[0038] A disc brake for a coal mine drilling rig includes: a brake spindle 1;

[0039] A circular collet 8 is disposed on the outer side of the brake spindle 1;

[0040] Pressure plate 9, the pressure plate 9 is disposed on the outer side of the circular clamp 8;

[0041] Brake piston 7, the brake piston 7 is disposed on the outer side of the pressure plate 9;

[0042] A chuck ring 10 is disposed at one end of the brake spindle 1;

[0043] Brake copper sleeve 2, the brake copper sleeve 2 is disposed on the outer side of the brake piston 7;

[0044] Brake housing 3, which is disposed on the outer side of the brake copper sleeve 2.

[0045] A brake transition sleeve 5 is provided at one end of the brake housing 3, and a brake rear cover 6 is provided at one end of the brake transition sleeve 5.

[0046] The brake rear cover 6 is fixedly installed by bolts and the chuck ring 10.

[0047] Two through connectors 4 are fixedly installed on the side of the brake housing 3.

[0048] Four circular slips 8 are symmetrically mounted on the brake spindle 1 and supported by the chuck ring 10 to ensure uniform force distribution. The pressure plate 9 is fixed to the circular slips 8 with screws, efficiently and evenly transmitting the piston thrust to the circular slips 8 and guiding their radial movement. The circular slips 8 and chuck ring 10 are connected to the brake piston 7, which provides power to the circular slips 8 to brake the drill. The brake piston 7 is connected to the brake copper sleeve 2 to ensure smooth and reliable operation. Finally, the brake housing 3, brake transition sleeve 5, and brake rear cover 6 are fixed in sequence with screws, and the chuck ring 10 is fixed to the brake rear cover 6 with screws. The straight connector 4 is connected to the top of the brake housing 3 for rapid input and output of hydraulic oil to drive the brake piston 7. One end of the brake spindle 1 is connected to the chuck ring 10 via a deep groove ball bearing, and the other end is connected to the drill bit reducer.

[0049] The working principle of the disc brake for coal mine drilling rigs provided by this utility model is as follows:

[0050] During braking, the release and clamping of the circular slips 8 are both achieved hydraulically. During the clamping phase, hydraulic oil is input into one of the straight connectors 4, and the hydraulic oil pushes the brake piston 7 to move forward axially. The brake piston 7 applies uniform radial pressure to the four sets of circular slips 8 through the pressure plate 9, and the circular slips 8 engage the brake spindle 1 to achieve braking. During the release phase, the hydraulic system switches the oil circuit, and hydraulic oil is input into another straight connector 4. The hydraulic oil pushes the brake piston 7 to move backward axially, and the pressure plate 9 releases the pressure on the circular slips 8. The circular slips 8 release the brake spindle 1, and the drilling rig can continue normal feeding operations.

[0051] Compared with related technologies, the disc brake for coal mine drilling rigs provided by this utility model has the following advantages:

[0052] By adopting a symmetrical arrangement of four sets of circular slips 8 structure, combined with a hydraulic drive, the uniform output of braking torque is achieved, effectively solving the problems of insufficient braking torque and uneven force distribution of traditional axle-type brakes. The hydraulic drive mechanism allows for rapid switching between braking and releasing actions, with a more sensitive response, and can accurately adapt to the diverse needs of frequent start-stop and angle adjustment in complex underground coal mine operations, meeting the stringent requirements of different coal seam geological conditions for drilling rig positioning accuracy and operational stability.

[0053] Meanwhile, this structural design reduces abnormal wear between the circular slip 8 and the brake spindle 1, reduces the risk of component adhesion caused by concentrated frictional heat, thereby significantly reducing the probability of sudden drop or failure of braking torque and significantly improving the safety of downhole operations.

[0054] Furthermore, the reduced frequency of replacement of vulnerable parts not only lowers equipment maintenance costs but also reduces construction interruptions caused by downtime for maintenance, ensuring the continuity of coal mine drilling operations. It is also better suited to the feed braking requirements of drilling rigs under complex working conditions, providing reliable braking guarantees for efficient and safe underground construction in coal mines.

[0055] Second Embodiment

[0056] Please refer to the following: Figure 8 and Figure 9 Based on the disc brake for a coal mine drilling rig provided in the first embodiment of this application, the second embodiment of this application proposes another disc brake for a coal mine drilling rig. The second embodiment is merely a preferred embodiment of the first embodiment, and the implementation of the second embodiment will not affect the separate implementation of the first embodiment.

[0057] Specifically, the second embodiment of this application provides a disc brake for a coal mine drilling rig, which differs in that the disc brake for a coal mine drilling rig also includes a spiral channel 11, which is opened inside the brake housing 3, and the output end and input end of the spiral channel 11 are respectively fixedly installed with a water outlet connector 13 and a water inlet connector 12.

[0058] Both the water outlet connector 13 and the water inlet connector 12 are fixedly installed on the side of the brake housing 3.

[0059] The inner side of the water inlet connector 12 is threaded with a support ring 14, and a filter screen 15 is fixedly installed on the inner side of the support ring 14. A retaining ring 16 is also fixedly installed on the inner side of the water inlet connector 12, and the retaining ring 16 is located on the top of the support ring 14.

[0060] The working principle of the disc brake for coal mine drilling rigs provided by this utility model is as follows:

[0061] During braking, the external cooling system injects coolant into the spiral channel 11 through the inlet connector 12. The coolant flows along the spiral channel 11 inside the brake housing 3, absorbs the heat generated by braking, and is discharged from the outlet connector 13, forming a circulating heat dissipation. The filter screen 15 filters the coolant entering the spiral channel 11 to prevent impurities from entering the channel and causing blockage. The support ring 14 provides installation support for the filter screen 15, and the retaining ring 16 restricts the position of the support ring 14 to ensure the stable operation of the filter screen 15.

[0062] Compared with related technologies, the disc brake for coal mine drilling rigs provided by this utility model has the following advantages:

[0063] The spiral channel 11 significantly increases the contact area and heat exchange time between the coolant and the brake housing 3, effectively solving the problem of poor heat dissipation in traditional brakes and avoiding slip sticking or reduction in braking torque caused by heat concentration.

[0064] 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 disc brake for a coal mine drilling rig, characterized in that, include: Braking spindle; A circular collet is disposed on the outer side of the brake spindle; A pressure plate, wherein the pressure plate is disposed on the outer side of the circular clamp; A brake piston, wherein the brake piston is disposed on the outer side of the pressure plate; A chuck ring, wherein the chuck ring is disposed at one end of the brake spindle; Brake copper sleeve, the brake copper sleeve is disposed on the outer side of the brake piston; A brake housing is disposed on the outer side of the brake copper sleeve.

2. The disc brake for a coal mine drilling rig according to claim 1, characterized in that, A brake transition sleeve is provided at one end of the brake housing, and a brake rear cover is provided at one end of the brake transition sleeve.

3. A disc brake for a coal mine drilling rig according to claim 2, characterized in that, The brake rear cover is fixedly installed by bolts and the chuck ring.

4. A disc brake for a coal mine drilling rig according to claim 1, characterized in that, Two straight connectors are fixedly installed on the side of the brake housing.

5. A disc brake for a coal mine drilling rig according to claim 1, characterized in that, It also includes a spiral channel, which is opened inside the brake housing, and the output end and input end of the spiral channel are respectively fixedly installed with a water outlet connector and a water inlet connector.

6. A disc brake for a coal mine drilling rig according to claim 5, characterized in that, Both the water outlet connector and the water inlet connector are fixedly installed on the side of the brake housing.

7. A disc brake for a coal mine drilling rig according to claim 6, characterized in that, The inner side of the water inlet connector is threaded with a support ring, and a filter screen is fixedly installed on the inner side of the support ring. A retaining ring is also fixedly installed on the inner side of the water inlet connector, and the retaining ring is located on the top of the support ring.

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