Hydraulic rock drill capable of automatically propelling

Abstract

The hydraulic rock drill comprises a mounting base, a drill rod movable frame and a transmission mechanism, one end of the drill rod movable frame is in sliding fit with the surface of the mounting base, the transmission mechanism is the same as the drill rod movable frame in position direction relative to the surface of the drill rod movable frame, and the transmission mechanism comprises a pull rope; every two adjacent pull ropes intersect with each other and are connected with the drill rod movable frame, self-adjusting structures are arranged at the top end of the installation base, the number of the self-adjusting structures is the same as that of the pull ropes, and the self-adjusting structures are symmetrically distributed based on the pull rope intersection points. The adjusting mechanism comprises a first torsion spring and a straightening roller, the included angle between the straightening roller and the contact end of the pull rope is adjustable, the included angle ranges from 90 degrees to 140 degrees, and the first torsion spring resists the tension change of the pull rope through the elasticity of the first torsion spring. According to the hydraulic rock drill capable of being automatically propelled, the first torsional spring dynamically adjusts the angle of the straightening roller through the elastic force of the first torsional spring, so that the tensile force of the pull rope is changed. When the pull rope is loosened, the first torsional spring stores energy to enable the correcting roller to rotate, and the tension of the pull rope is increased.

Description

Technical Field

[0001] The invention relates to the technical field of rock drill rope pulling, in particular to an automatically propelled hydraulic rock drill. Background Art

[0002] The tension of the pull rope in the hydraulic rock drill is fixed and fixed by the pulley and gear structure. The pulling force of the wire rope directly acts on the slide. The motor drives the gear, and the gear drives the pulley to rotate, thereby pulling the wire rope to achieve the advancement of the slide. However, the pull rope will continue to relax or become tight after long-term operation. For example, when the rock formation is soft or the resistance is small, the pull rope is prone to relax due to insufficient load, and when the equipment is running in a high or low temperature environment, the pull rope material will expand and contract due to heat and cold, resulting in changes in its length, which in turn causes relaxation or tension. At the same time, when the rock drill encounters a rock formation with higher hardness, the load on the pull rope will suddenly increase, causing it to be over-tightened.

[0003] If the pull rope becomes loose, the pulley and gear system cannot effectively transmit the driving force of the motor, resulting in insufficient propulsion force of the slide. The loose pull rope may cause the slide to shake or shift during movement, affecting the accuracy of rock drilling. Especially when the hardness of the rock formation is uneven, the unstable movement of the slide may cause the rock drilling position to deviate from the target.

[0004] If the pull rope is too tight, it will bear greater tension, which may easily lead to fatigue damage of the wire rope. Long-term use may cause the wire rope to break suddenly. In addition, the taut pull rope is prone to vibration and noise during movement, and the vibration may also be transmitted to the rock drill body, affecting the rock drilling accuracy.

[0005] When encountering the above-mentioned special working conditions, manual intervention is required to adjust the position of the pulley or replace the wire rope of different lengths. However, the hardness and resistance of the rock formation may change at any time. The replaced or adjusted pull rope may easily become loose or tight again during the rock drilling process, making it difficult to ensure that the pull rope is in a stable state. Summary of the invention

[0006] The object of the present invention is to provide an automatically propelled hydraulic rock drill to solve the problem in the background art that the hardness and resistance of the rock formation may change at any time, causing the rock drill rope to be too tight or too loose, thereby affecting the transmission stability.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an automatically propelled hydraulic rock drill, comprising a mounting seat, a drill rod movable frame and a transmission mechanism, one end of the drill rod movable frame is slidably matched with the surface of the mounting seat, the transmission mechanism is arranged in the same position direction with respect to the surface of the drill rod movable frame and the drill rod movable frame, characterized in that: the transmission mechanism comprises a pull rope, two adjacent pull ropes cross each other and are connected to the drill rod movable frame, a dynamic vibration elimination mechanism is arranged at the front and rear ends and the outer surface of the pull rope, the dynamic vibration elimination mechanism comprises a primary damping and a secondary damping, a self-adjusting structure is arranged at the top of the mounting seat and the number is the same as that of the pull rope, and the self-adjusting mechanism is symmetrically distributed based on the crossing point of the pull rope; A slide plate is symmetrically arranged at the bottom of the drill rod movable frame, and one end of the slide plate and the fastening assembly form a movable disassembly structure; The self-adjusting mechanism includes a first torsion spring, a second torsion spring and a correction roller, and the angle between the correction roller and the contact end of the pull rope can be adjusted in the range of 95°-140°; The primary damping is that the first torsion spring and the second torsion spring form an eddy current damping structure through their own spiral structures when the angle changes.

[0008] The fastening assembly includes a limit block and a spring column. A plurality of spring columns are evenly spaced and distributed on the outer surface of one end of the limit block. The limit block and the fastening assembly have a size difference and cooperate with the spring column fixedly connected to form a transverse force structure. The outer surface of one end of the pull rope is engaged with the lead seat. The secondary damping is a viscous damping structure formed by the axial compression of the spring column and the indirect connection with the pull rope through the limit block and the lead seat.

[0009] The two pull ropes have a certain height difference to avoid friction between each other. The correction roller contacts the pull rope by means of resistance, and the power source of the correction roller is generated by the first torsion spring. The first torsion spring can adjust the tightness of the pull rope according to its own elastic force, and the first torsion spring can store energy. When the pull rope becomes loose, the stored energy can make the correction roller rotate and adapt to the tension of the pull rope.

[0010] As a preferred technical solution of the present invention, the adjustment mechanism also includes a movable shaft seat and a roller bracket, and the upper and lower ends of the inner wall of the roller bracket are connected to the correction roller shaft.

[0011] By adopting the above technical solution, the interior of the movable shaft seat is a semicircular hollow structure, and baffles smaller than the outer diameter of the correction roller are provided at the upper and lower ends, so as to provide the correction roller for rotation and fix the correction roller at the same time.

[0012] As a preferred technical solution of the present invention, the movable shaft seat is in an "L"-shaped structure, and the movable shaft seat is fixedly connected to the first torsion spring.

[0013] By adopting the above technical solution, the shape structure of the movable shaft seat can concentrate the force on the correction roller, and the center end of the correction roller fits the position of the pull rope, so that the force is more uniform, the transmission effect of the movable shaft seat is increased, and the transmission is more stable.

[0014] As a preferred technical solution of the present invention, the adjustment mechanism further includes a fixed block, a sliding block and a guide groove, and one end of the fixed block is in contact with the end of the first torsion spring.

[0015] With the above technical solution, the fixing block is used to limit the end of the first torsion spring, and the number of the fixing blocks is symmetrically arranged, which can reduce the volume occupied.

[0016] As a preferred technical solution of the present invention, the guide groove and the movable shaft seat are located on the same central axis, and the guide groove is an arc-shaped structure that slidably cooperates with the slider, and the slider is fixedly installed at the bottom of the roller bracket.

[0017] By adopting the above technical solution, the guide groove and the movable shaft seat are arc-shaped respectively, and the slider inside the guide groove is also arc-shaped. The slider is arranged at the bottom of the roller bracket to ensure that the roller bracket is normally stressed and reduce the friction of the roller bracket in the guide groove.

[0018] As a preferred technical solution of the present invention, the outer surface of one end of the pull rope is snap-connected with the lead seat.

[0019] By adopting the above technical solution, the lead seat serves as the fixed end of the pull rope, and the connection strength with the pull rope is relatively high. The connection method can be bending, drawing or welding, wherein the pull rope is composed of a steel wire rope.

[0020] As a preferred technical solution of the present invention, a slide plate is symmetrically arranged at the bottom of the drill rod movable frame, and one end of the slide plate and the fastening assembly form a movable disassembly structure.

[0021] By adopting the above technical solution, the slide plate and the fastening assembly can be disassembled and assembled to replace or adjust the tightness of the pull rope.

[0022] As the preferred technical solution of the content of the present invention, the fastening assembly includes a positioning groove, a limiting groove, a buffer channel, a limiting block and a spring column. The positioning groove is located at the middle end of the fastening assembly and slides with the lead seat. The lead seat is adapted to the shape of the positioning groove. The limiting groove is located at one end of the positioning groove, and the length of the positioning groove is the same as that of the limiting groove. The spacing between the inner walls of the limiting groove is greater than the outer diameter of the pull rope. A plurality of screw holes are opened inside the slide plate and the fastening assembly, and the screw holes are threadedly connected to the bolts.

[0023] By adopting the above technical solution, the slide plate and the fastening assembly are fixed directly through the bolt holes, and the positions of the bolt holes do not overlap or conflict with the positions of the positioning grooves, the limiting grooves, the buffer channels, the limiting blocks and the spring columns.

[0024] As the preferred technical solution of the present invention, the buffer channel is symmetrical with the position of the limit slot about the center end of the positioning slot, the length of the buffer channel is smaller than the length of the positioning slot, a limit block is provided inside the buffer channel and slidingly cooperates with the limit block, the limit block and the lead seat connecting end are respectively provided with mutually meshing tooth blocks, the limit block and the lead seat form a one-way moving structure through the tooth block, a number of spring columns are provided on the back of the limit block, the spring column and the limit block are movably cooperated, and the other end of the spring column is fixedly connected to the fastening assembly, the size difference between the limit block and the fastening assembly and the fixedly connected spring column form a lateral force structure.

[0025] By adopting the above technical solution, the spring column arranged inside the buffer channel can be compressed according to the extrusion force of the lead seat, so that the lead seat can move backward inside the positioning groove, and the limit block is completely fitted with the buffer channel. The limit block can be fixed at an angle, so that the bolts and fastening components are used as support points to ensure that the pull rope has sufficient traction force.

[0026] As a preferred technical solution of the present invention, the transmission mechanism includes a motor, a rotating shaft, a reduction gear, a driven gear, a first pulley, a second pulley and a guide wheel. The rotating shaft is fixedly connected to the center ends of the reduction gear, the driven gear, the first pulley, the second pulley and the guide wheel. The rotating shaft connected to the reduction gear is connected to the output end of the motor. The reduction gear and the driven gear are meshed to transmit the first pulley and the second pulley to rotate in relative directions. The guide wheel is arranged at the same level as the first pulley and the second pulley.

[0027] By adopting the above technical solution, the movement of the drill rod movable frame is achieved by pulling the pull ropes together, and the pull ropes pass around the corresponding pulleys, and the motor drives the pinion gear to mesh with two adjacent driven gears to achieve the effect of controlling the movement of the drill rod movable frame.

[0028] Compared with the prior art, the self-propelled hydraulic rock drill of the present invention has the following beneficial effects: The first torsion spring dynamically adjusts the angle of the correction roller through its own elastic force, thereby changing the tension of the rope. When the rope is loose, the first torsion spring stores energy to rotate the correction roller and increase the tension of the rope; when the rope is too tight, the first torsion spring releases energy to reduce the tension of the rope. The angle between the correction roller and the rope is designed to be 95°-140°, which can cover various working conditions from loose to tight, ensuring that the rope always maintains moderate tension under different loads. By dynamically adjusting the tension of the rope, the swing or offset of the slide caused by looseness or tightness is avoided, and the accuracy of rock drilling is improved, especially when the hardness of the rock layer is uneven, the accurate rock drilling position can be ensured. The automatic adjustment function of the first torsion spring and the correction roller reduces the frequency of manual intervention. The operator does not need to frequently adjust the pulley position or replace the rope, which improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 3 It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 4 It is a schematic diagram of the cross-sectional structure of the mounting seat and the guide groove of the present invention; Figure 5 It is a schematic diagram of the tension state of the pull rope and the correction roller of the present invention; Figure 6 It is a schematic diagram of the disassembled structure of the slide plate and the fastening assembly of the present invention; Figure 7 It is a schematic diagram of the cross-sectional structure of the slide plate and the fastening assembly of the present invention; Figure 8 It is a schematic diagram of the cross-sectional structure of the fastening assembly and the buffer channel of the present invention; Fig. 9 It is a schematic diagram of the overall top view structure of the present invention; Fig.10 This is a schematic diagram of the vibration damping structure of the pull rope of the present invention; Fig.11 This is a structural diagram of Embodiment 2 of the present invention.

[0030] In the figure: 1. mounting seat; 101. guide groove; 2. movable frame for drill rod; 21. slide plate; 22. screw hole; 23. bolt; 3. first pulley; 31. second pulley; 32. guide wheel; 33. pull rope; 34. lead seat; 35. gear block; 4. motor; 41. rotating shaft; 42. reduction gear; 43. driven gear; 5. movable shaft seat; 51. roller bracket; 52. first torsion spring; 53. fixing block; 54. correction roller; 55. slider; 56. second torsion spring; 57; arc spring; 6. fastening assembly; 61. positioning groove; 62. limiting groove; 63. buffer channel; 64. limiting block; 65. spring column. DETAILED DESCRIPTION Example

[0031] See also Figure 1-10 The present invention provides a technical solution: a hydraulic rock drill that can be automatically propelled, comprising a mounting seat 1, a drill rod movable frame 2 and a transmission mechanism, one end of the drill rod movable frame 2 is slidably matched with the surface of the mounting seat 1, and the transmission mechanism is arranged in the same position and direction as the drill rod movable frame 2 with respect to the surface of the drill rod movable frame 2, characterized in that: the transmission mechanism comprises a pull rope 33, two adjacent pull ropes 33 cross each other and are connected to the drill rod movable frame 2, the front and rear ends and the outer surface of the pull rope 33 are provided with a dynamic vibration elimination mechanism, the dynamic vibration elimination mechanism includes a primary damping and a secondary damping, a self-adjusting structure is provided at the top of the mounting seat 1, and the number is the same as that of the pull rope 33, and the self-adjusting mechanism is symmetrically distributed based on the intersection of the pull rope 33; A slide plate 21 is symmetrically arranged at the bottom of the drill rod movable frame 2, and one end of the slide plate 21 and the fastening assembly 6 form a movable assembly and disassembly structure; The self-adjusting mechanism includes a first torsion spring 52, a second torsion spring 56 and a correction roller 54, and the angle between the correction roller 54 and the contact end of the pull rope 33 can be adjusted in the range of 95°-140°; The primary damping is that the first torsion spring 52 and the second torsion spring 56 form an eddy current damping structure through their own spiral structures when the angle changes.

[0032] The fastening assembly 6 includes a limit block 64 and a spring column 65. A plurality of spring columns 65 are evenly spaced and distributed on the outer surface of one end of the limit block 64. The limit block 64 and the fastening assembly 6 have a size difference and cooperate with the spring column 65 that is fixedly connected to form a transverse force structure. The outer surface of one end of the pull rope 33 is engaged with the lead seat 34. The secondary damping is a viscous damping structure formed by the axial compression of the spring column 65 and the indirect connection with the pull rope 33 through the limit block 64 and the lead seat 34.

[0033] The drill rod movable frame 2 is located at the top of the mounting seat 1, and the upper and lower ends of the drill rod movable frame 2 can slide in close contact with the mounting seat 1 or move in close contact with the rock drill housing, so that the drill rod movable frame 2 can be displaced in a parallel sliding manner. Four slide plates 21 and a fastening assembly 6 are arranged at the bottom of the drill rod movable frame 2 to fix one end of the pull rope 33, and the pull rope 33 is guided to the wheel 32 or the corresponding first pulley 3 and second pulley 31 in turn. Since the two pulleys have the same diameter and their positions correspond to each other, under the same rotation speed, the two pull ropes 33 cooperate with each other, and one end pulls the other end to be pulled, so as to achieve a loose and a release effect. The motor 4 rotates the reduction gear 42. In order to ensure the torque of the rotation, the reduction gear 42 with an outer diameter smaller than the driven gear 43 is used as the seat driving source to ensure that the power for the propulsion of the drill rod is sufficient; The angle formed by the fitting ends of the first torsion spring 52 and the fixing block 53 is 180°, which is a normal state without compression. The angle formed by the fitting ends of the fixing block 53 and the second torsion spring 56 is not less than 180°. At this time, the angle can be set between 180°-300°. The second torsion spring 56 in this angle range is in a compressed state. The first torsion spring 52 and the second torsion spring 56 are respectively arranged at the upper and lower ends of the movable shaft seat 5. For example, when the angle between the movable shaft seat 5 and the pull rope 33 is 95°, and the second torsion spring 56 is The first torsion spring 52 can be compressed only when the angle exceeds 95°. The double torsion springs are arranged up and down. On the one hand, the energy storage elastic force can be increased, which is more stable when the tension is adjusted. On the other hand, when the first torsion spring 52 is compressed, the energy storage elastic forces of the two cooperate with each other, so that the correction roller 54 and the pull rope 33 are more closely fitted, and the separation interval between the correction roller 54 and the pull rope 33 does not exceed 0.002s, so that the energy storage rotation elastic force is more sensitive to trigger and the shock absorption effect is improved. The first torsion spring 52 and the second torsion spring 56 adopt a variable pitch winding process with a pitch gradually changing from 5 mm to 8 mm, so that the stiffness increases exponentially with the compression amount, where k(x)=k0+0.2 x2 (k0=500N / mm, where x is the compression displacement. This feature can provide instantaneous high-rigidity support during severe impact (such as sudden change in rock formation) to prevent the pull rope 33 from resonating and breaking. Its spiral structure can absorb 15%-20% of high-frequency vibration energy. The axial compression of the spring column 65 provides viscous damping (damping coefficient c=120N·s / m), reducing the 20-50Hz vibration amplitude of the rock drill by 60% when it is working (measured data).

[0034] The movable shaft seat 5 is arranged at the top of the mounting seat 1, and the angle and position of the movable shaft seat 5 are mirror-imaged on the other side, forming two limit parts that fit with the pull rope 33, and the movable range of the angle between the movable shaft seat 5 and the connecting end of the pull rope 33 is 95°-140°. Therefore, in order to ensure that the tightness is adjustable, the preset angle range is 120° (this angle is already in an energy storage state). When it is too tight, the 120°-140° first torsion spring 52 rotates and stores energy to counteract it and maintain the tension of the pull rope 33. If it is too loose, the energy storage of the first torsion spring 52 generated by the preset angle adjusts the angle of the correction roller 54, and the maximum angle cannot exceed 90°. If the angle between the correction roller 54 and the pull rope 33 is about 90°, it is necessary to adjust the tightness of the pull rope 33. The guide groove 101 and the movable shaft seat 5 are arc-shaped respectively, and the slider inside the guide groove is also arc-shaped. The slider is arranged at the bottom of the roller bracket to ensure that the roller bracket is normally stressed and reduce the friction of the roller bracket in the guide groove. When the angle between the correction roller 54 and the pull rope 33 is about 90°, the pull rope 33 needs to be adjusted. In the one-way moving structure formed by the slide plate 21 and the fastening assembly 6, the pull rope 33 can be adjusted by directly pulling. The specific principle is as follows: The slide plate 21 and the fastening assembly 6 are in a state of being fitted and fixed to adjust the pull rope 33. The lead seat 34 at one end of the pull rope 33 is located in the positioning groove 61 of the fastening assembly 6. The lead seat 34 and the limit block 64 inside the fastening assembly 6 are respectively provided with tooth blocks 35 that mesh with each other. Figure 1As shown in the reference numerals, the inclined surface of the tooth block 35 provided on the lead seat 34 in the fastening assembly 6 faces the first pulley 3 or the second pulley 31, and the inclined surface of the tooth block 35 provided on the limit block 64 faces the guide wheel 32. Because the two are in a meshing state, when the pull rope 33 is pulled toward the guide wheel 32, the right-angle surface of the limit block 64 and the tooth block 35 of the lead seat 34 fits with each other, thereby forming a one-way movement limit, and when the pull rope 33 is pulled toward the first pulley 3 or the second pulley 31, the limit block 64 and the lead seat 34 fit together. The inclined surfaces of the tooth blocks 35 of the seat 34 fit together, and the limit block 64 has a movable space inside the buffer channel 63. Therefore, when the inclined surfaces of the tooth blocks 35 fit together and move, they will squeeze each other, so that the limit block 64 is squeezed into the buffer channel 63, thereby adjusting the accuracy of the pull rope 33. The limit block 64, the buffer channel 63 and the spring column 65 form a one-way structure. Under the energy storage elastic force of the spring column 65, when the pull rope 33 loses traction, the lead seat 34 and the tooth blocks 35 adjacent to the limit block 64 are quickly reset; The fastening assembly 6 is also provided with a limiting groove 62, and the inner wall spacing of the limiting groove 62 is smaller than the spacing of the positioning groove 61. On the one hand, it is to ensure the limitation of the lead seat 34, and on the other hand, it is convenient for the disassembly of the pull rope 33. When the pull rope 33 is replaced, the bolt 23 in the screw hole 22 of the slide plate 21 and the fastening assembly 6 is taken out to separate the slide plate 21 from the fastening assembly 6, and then the pull rope 33 and the lead seat 34 are pulled through the positioning groove 61, so that the lead seat 34 is completely removed from the inside of the positioning groove 61. At this time, the pull rope 33 and the limiting groove 62 are horizontally corresponding, and the pull rope 33 can directly pass through the inside of the limiting groove 62.

[0035] The relationship between rope tension and angle: When the angle between the correction roller and the pull rope is 95°, the first torsion spring is in the maximum compression state and bears the maximum pressure. At this time, the first torsion spring needs to provide sufficient reaction force to maintain the tension of the pull rope; When the angle is 120°, the first torsion spring is in a preset equilibrium state, at which time the tension of the pull rope is moderate and the pressure value of the first torsion spring is the design reference value; When the angle is 140°, the first torsion spring is in the minimum compression state and bears the minimum pressure, but still needs to maintain a certain reaction force to prevent the pull rope from loosening; Assuming that the tension of the pull rope ranges from 500N to 1500N, the pressure values ​​of the first torsion spring at different angles are as follows: 95°: The first torsion spring pressure is about 1500N; 120°: The first torsion spring pressure is about 1000N; 140°: The first torsion spring pressure is about 500N.

[0036] The thickness of the wire rope directly affects its tension and the pressure value of the first torsion spring. Assuming that the diameter of the wire rope is 6mm, its maximum tension is 1500N; if the diameter increases to 8mm, its maximum tension can reach 2000N. At this time, the pressure value of the first torsion spring needs to be adjusted accordingly.

[0037] The relationship between the first torsion spring pressure and the thickness of the wire rope: 6mm steel wire rope: The first torsion spring pressure range is 500N-1500N.

[0038] 8mm steel wire rope: The first torsion spring pressure range is 700N-2000N.

[0039] At high temperatures (such as 60°C), the elastic modulus of the first torsion spring material will decrease, resulting in a decrease in its hardness and a decrease in the pressure value. At this time, the pressure value of the first torsion spring may decrease by 10%-15%.

[0040] At low temperatures (such as -20°C), the elastic modulus of the first torsion spring material will increase, resulting in an increase in its hardness and an increase in the pressure value. At this time, the pressure value of the first torsion spring may increase by 10%-15%.

[0041] In order to adapt to different temperature environments, the initial pressure value of the first torsion spring should be slightly higher than the design reference value to compensate for the performance fluctuations caused by temperature changes.

[0042] Under low-frequency jitter (such as 1-5Hz), the pressure value of the first torsion spring changes little, which can effectively buffer the vibration and keep the tension of the pull rope stable.

[0043] Under high-frequency jitter (such as 10-20Hz), the pressure value of the first torsion spring changes greatly, which may shorten its fatigue life. In this case, the design of the first torsion spring needs to consider higher fatigue strength.

[0044] The first torsion spring has an outer diameter of 50 mm, an inner diameter of 30 mm, and a length of 100 mm.

[0045] The steel wire diameter of the first torsion spring is 6 mm to ensure sufficient strength and elasticity.

[0046] The hardness of the first torsion spring is 45-50HRC to provide moderate elastic modulus and fatigue resistance.

[0047] The first torsion spring is made of 60Si2MnA spring steel, which has high elastic limit, fatigue resistance and heat resistance, and is suitable for use under complex working conditions.

[0048] The first torsion spring is manufactured by a cold rolling process and is subsequently quenched and tempered to increase its hardness and elastic properties.

[0049] The initial pressure value of the first torsion spring is set to 1200N to adapt to pressure changes under different angles and working conditions.

[0050] The design life of the first torsion spring should be no less than 10^6 cycles to ensure its reliability in long-term use.

[0051] The material and process of the first torsion spring must ensure that its performance is stable within the range of -20°C to 60°C, and the pressure value fluctuation does not exceed 15%.

[0052] Functional Dimensions Traditional Torsion Spring Solution and the Solution of the Invention Tension adjustment range: 500-1000N (linear), 300-1500N (non-linear adjustable), vibration attenuation rate ≤30% (single-stage damping), ≥60% (two-stage composite damping), temperature stability: -20℃~60℃ tension change ±20%, tension change in the same temperature zone ≤±5%, impact resistance: maximum instantaneous impact of 10kN, can withstand instantaneous impact of 15kN (increased by 50%).

[0053] The torsion spring 52 in this solution is formed by laser selective melting (SLM), a microporous structure (aperture 50-100 μm) is prefabricated in the spiral gap, and the copper plating layer is formed by a magnetron sputtering + electroplating composite process to improve the damping performance.

[0054] While dynamically adjusting the tension, the torsion spring has a vibration damping function to reduce system vibration; or the material and structural design of the torsion spring enables it to maintain stable performance at extreme temperatures and extend its service life; or the synergy between the torsion spring and other components (such as limit blocks, spring columns) forms a multiple buffering mechanism to improve the overall stability of the system. The torsion spring integrates vibration damping and temperature compensation, thereby improving system reliability and environmental adaptability while adjusting the tension. In the prior art, the torsion spring is usually only used to provide elastic restoring force. The torsion spring 52 in this patent achieves tension adjustment + vibration damping through special structural design and material selection. Example

[0055] See also Figure 1-11 The present invention provides a technical solution: a hydraulic rock drill that can be automatically propelled, comprising a mounting seat 1, a drill rod movable frame 2 and a transmission mechanism, one end of the drill rod movable frame 2 is slidably matched with the surface of the mounting seat 1, and the transmission mechanism is arranged in the same position and direction as the drill rod movable frame 2 with respect to the surface of the drill rod movable frame 2, characterized in that: the transmission mechanism comprises a pull rope 33, two adjacent pull ropes 33 cross each other and are connected to the drill rod movable frame 2, the front and rear ends and the outer surface of the pull rope 33 are provided with a dynamic vibration elimination mechanism, the dynamic vibration elimination mechanism includes a primary damping and a secondary damping, a self-adjusting structure is provided at the top of the mounting seat 1, and the number is the same as that of the pull rope 33, and the self-adjusting mechanism is symmetrically distributed based on the intersection of the pull rope 33; A slide plate 21 is symmetrically arranged at the bottom of the drill rod movable frame 2, and one end of the slide plate 21 and the fastening assembly 6 form a movable assembly and disassembly structure; The self-adjusting mechanism includes a first torsion spring 52, a second torsion spring 56 and a correction roller 54, and the angle between the correction roller 54 and the contact end of the pull rope 33 can be adjusted in the range of 95°-140°; The primary damping is that the first torsion spring 52 and the second torsion spring 56 form an eddy current damping structure through their own spiral structures when the angle changes.

[0056] The fastening assembly 6 includes a limit block 64 and a spring column 65. A plurality of spring columns 65 are evenly spaced and distributed on the outer surface of one end of the limit block 64. The limit block 64 and the fastening assembly 6 have a size difference and cooperate with the spring column 65 that is fixedly connected to form a transverse force structure. The outer surface of one end of the pull rope 33 is engaged with the lead seat 34. The secondary damping is a viscous damping structure formed by the axial compression of the spring column 65 and the indirect connection with the pull rope 33 through the limit block 64 and the lead seat 34.

[0057] The adjusting mechanism further comprises a movable shaft seat 5 and a roller bracket 51 , and the upper and lower ends of the inner wall of the roller bracket 51 are connected to the axis of the correction roller 54 .

[0058] The movable shaft seat 5 is in an “L”-shaped structure, and the movable shaft seat 5 is fixedly connected to the first torsion spring 52 .

[0059] The adjustment mechanism further includes a fixing block 53 , a sliding block 55 and a guide groove 101 . One end of the fixing block 53 is in contact with the end of the first torsion spring 52 .

[0060] The guide groove 101 and the movable shaft seat 5 are located on the same central axis, and the guide groove 101 is an arc-shaped structure that slidably cooperates with the slider 55 , and the slider 55 is fixedly installed at the bottom of the roller bracket 51 .

[0061] The outer surface of one end of the pull rope 33 is engaged with the lead seat 34 .

[0062] A slide plate 21 is symmetrically arranged at the bottom of the drill rod movable frame 2. One end of the slide plate 21 and the fastening assembly 6 form a movable disassembly structure. The slide plate 21 and the fastening assembly 6 are disassembled to replace the pull rope or adjust the tightness.

[0063] The fastening assembly 6 includes a positioning groove 61, a limiting groove 62, a buffer channel 63, a limiting block 64 and a spring column 65. The positioning groove 61 is located at the middle end of the fastening assembly 6 and slides with the lead seat 34. The lead seat 34 is adapted to the shape of the positioning groove 61. The limiting groove 62 is located at one end of the positioning groove 61, and the length of the positioning groove 61 is the same as that of the limiting groove 62, and the inner wall spacing of the limiting groove 62 is greater than the outer diameter of the pull rope 33. A plurality of screw holes 22 are opened inside the slide plate 21 and the fastening assembly 6, and the screw holes 22 are threadedly connected with the bolts 23. The slide plate 21 and the fastening assembly 6 are fixed directly through the bolt screw holes, and the positions of the bolt screw holes do not overlap or conflict with the positions of the positioning grooves 61, the limiting grooves 62, the buffer channel 63, the limiting block 64 and the spring column 65.

[0064] The buffer channel 63 is symmetrical with the limit slot 62 about the center end of the positioning slot 61, and the length of the buffer channel 63 is less than the length of the positioning slot 61. A limit block 64 is provided inside the buffer channel 63 and slides with the limit block 64. The connecting ends of the limit block 64 and the lead seat 34 are respectively provided with mutually meshing tooth blocks 35. The limit block 64 and the lead seat 34 form a one-way moving structure through the tooth block 35. A plurality of spring columns 65 are provided on the back of the limit block 64. The spring column 65 is movably matched with the limit block 64, and the other end of the spring column 65 is fixedly connected to the fastening assembly 6. The size difference between the limit block 64 and the fastening assembly 6 and the fixedly connected spring column 65 form a lateral force structure.

[0065] The transmission mechanism includes a motor 4, a rotating shaft 41, a reduction gear 42, a driven gear 43, a first pulley 3, a second pulley 31 and a guide wheel 32. The rotating shaft 41 is fixedly connected to the center ends of the reduction gear 42, the driven gear 43, the first pulley 3, the second pulley 31 and the guide wheel 32. The rotating shaft 41 connected to the reduction gear 42 is connected to the output end of the motor 4. The reduction gear 42 and the driven gear 43 are meshed and transmitted to make the first pulley 3 and the second pulley 31 rotate in relative directions. The guide wheel 32 is arranged at the same level as the first pulley 3 and the second pulley 31.

[0066] See also Fig.10 The correction roller 54 of the self-adjusting structure is a double-roller structure, and the pull rope 33 is located between the two correction rollers 54. When it is too tight, the front correction roller 54 contacts the pull rope 33, and when it is loose, the rear correction roller 54 contacts the pull rope 33. What is different from the first embodiment is that the correction roller 54 of this embodiment is always in contact with the pull rope 33, the fit is better, and the force is more stable.

[0067] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. An automatically propelled hydraulic rock drill, comprising a mounting seat (1), a drill rod movable frame (2) and a transmission mechanism, wherein one end of the drill rod movable frame (2) is slidably matched with a surface of the mounting seat (1), and the transmission mechanism is arranged in the same position and direction with respect to the surface of the drill rod movable frame (2) as the drill rod movable frame (2), characterized in that: The transmission mechanism comprises a pull rope (33), two adjacent pull ropes (33) cross each other and are connected to the drill rod movable frame (2), the front and rear ends and the outer surface of the pull rope (33) are provided with a dynamic vibration reduction mechanism, the dynamic vibration reduction mechanism comprises a primary damping and a secondary damping, the top end of the mounting seat (1) is provided with a self-adjusting structure and the number is the same as that of the pull ropes (33), and the self-adjusting mechanism is symmetrically distributed based on the crossing point of the pull ropes (33); A slide plate (21) is symmetrically arranged at the bottom of the drill rod movable frame (2), and one end of the slide plate (21) and the fastening assembly (6) form a movable assembly and disassembly structure; The self-adjusting mechanism comprises a first torsion spring (52), a second torsion spring (56) and a correction roller (54); the included angle between the correction roller (54) and the contact end of the pull rope (33) is adjustable within a range of 95°-140°; The primary damping is that the first torsion spring (52) and the second torsion spring (56) form an eddy current damping structure through their own spiral structures when the angle changes; The fastening assembly (6) comprises a limit block (64) and a spring column (65), wherein a plurality of spring columns (65) are evenly spaced and distributed on an outer surface of one end of the limit block (64), the limit block (64) and the fastening assembly (6) have a size difference and cooperate with the spring columns (65) that are fixedly connected to form a transverse force-bearing structure, and an outer surface of one end of the pull rope (33) is snap-connected with the lead seat (34); The secondary damping is a viscous damping structure formed by axial compression of the spring column (65) and indirect connection with the pull rope (33) through the limit block (64) and the lead seat (34).

2. The automatically propelled hydraulic rock drill according to claim 1, characterized in that: The self-adjusting mechanism further comprises a movable shaft seat (5) and a roller bracket (51), wherein the upper and lower ends of the inner wall of the roller bracket (51) are connected to the axis of the correction roller (54).

3. The automatically propelled hydraulic rock drill according to claim 2, characterized in that: The movable shaft seat (5) is in an "L"-shaped structure, and the movable shaft seat (5) is fixedly connected to the first torsion spring (52) and the second torsion spring (56).

4. The automatically propelled hydraulic rock drill according to claim 1, characterized in that: The adjustment mechanism further comprises a fixed block (53), a sliding block (55) and a guide groove (101); the fixed block (53) is in a right-angled triangular structure; the plane end of the fixed block (53) is in contact with the end of the first torsion spring (52); and the inclined surface end of the fixed block (53) is in contact with the end of the second torsion spring (56).

5. The self-propelled hydraulic rock drill according to claim 4, characterized in that: The guide groove (101) and the movable shaft seat (5) are located on the same central axis, and the guide groove (101) is in an arc-shaped structure and slidably cooperates with the slider (55). The slider (55) is fixedly mounted on the bottom of the roller bracket (51), and an arc-shaped spring (57) is provided between the guide groove (101) and the slider (55).

6. The self-propelled hydraulic rock drill according to claim 4, characterized in that: The angle formed by the fitting ends of the first torsion spring (52) and the fixing block (53) is 180°, and the angle formed by the fitting ends of the fixing block (53) and the second torsion spring (56) is not less than 180°.

7. The self-propelled hydraulic rock drill according to claim 1, characterized in that: The fastening assembly (6) further comprises a positioning groove (61), a limiting groove (62) and a buffer channel (63); the positioning groove (61) is located at the middle end of the fastening assembly (6) and is slidably matched with the lead seat (34); the lead seat (34) and the positioning groove (61) are adapted in shape; the limiting groove (62) is located at one end of the positioning groove (61); the length of the positioning groove (61) is the same as that of the limiting groove (62); the inner wall spacing of the limiting groove (62) is greater than the outer diameter of the pull rope (33); a plurality of screw holes (22) are provided inside the slide plate (21) and the fastening assembly (6); and the screw holes (22) are threadedly connected to the bolts (23).

8. The self-propelled hydraulic rock drill according to claim 7, characterized in that: The buffer channel (63) is symmetrically located with respect to the center end of the positioning groove (61) and the position of the limit groove (62). The length of the buffer channel (63) is less than the length of the positioning groove (61). The buffer channel (63) is slidably matched with the limit block (64). The connection ends of the limit block (64) and the lead seat (34) are respectively provided with mutually meshing tooth blocks (35). The limit block (64) and the lead seat (34) form a one-way movable structure through the tooth blocks (35).

9. The automatically propelled hydraulic rock drill according to claim 1, characterized in that: The transmission mechanism comprises a motor (4), a rotating shaft (41), a reduction gear (42), a driven gear (43), a first pulley (3), a second pulley (31) and a guide wheel (32); the rotating shaft (41) is fixedly connected to the center ends of the reduction gear (42), the driven gear (43), the first pulley (3), the second pulley (31) and the guide wheel (32); the rotating shaft (41) connected to the reduction gear (42) is connected to the output end of the motor (4); the reduction gear (42) and the driven gear (43) are meshed and driven to rotate the first pulley (3) and the second pulley (31) in relative directions; and the guide wheel (32) is arranged at the same level as the first pulley (3) and the second pulley (31).

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