Control valve group automatic return device applied to hydraulic support

Abstract

The invention relates to the technical field of hydraulic supports, in particular to a control valve set automatic return device applied to a hydraulic support, and the hydraulic support automatic return device comprises a base, a mounting groove is fixedly connected to the upper surface of the base, and first fixing plates are fixedly connected to the left side and the right side of the upper surface of the mounting groove; a first connecting rod is movably connected to the interior of the first fixing plate, a first movable block is movably connected to the outer wall of the first connecting rod, a first movable block is fixedly connected to the upper surface of the first movable block, and a pair of telescopic rods is fixedly connected to the upper surface of the first movable block. The bidirectional driving motor can accurately control the movement of the roller on the rack through the combination of the electromagnetic clutch and the harmonic gear, the flexible movement of the hydraulic support control valve group under the light-load working condition is realized, the output torque of the motor is effectively amplified through the high transmission of the harmonic gear, the motor power requirement is reduced while the movement precision is ensured, and the working efficiency is improved. And no-load energy consumption is reduced.

Description

Technical Field

[0001] This invention relates to the field of hydraulic support technology, specifically to an automatic return device for control valve groups used in hydraulic supports. Background Technology

[0002] In underground engineering operations such as coal mining and tunneling, hydraulic supports serve as critical support equipment, and their stability and reliability directly affect operational safety and efficiency. Hydraulic supports achieve precise control of actions such as supporting, lifting, and moving through control valve groups. The automatic return function of the control valve groups is a crucial link in ensuring that the hydraulic supports can quickly and accurately return to their initial state after completing a work cycle, preparing them for the next cycle.

[0003] Traditional automatic return devices for hydraulic support control valve groups mostly employ simple spring reset or direct hydraulic cylinder drive. However, these methods have many limitations in practical applications. Although the spring reset method is simple in structure, its return speed and force are difficult to adjust flexibly under different load conditions. This often leads to excessively fast return and impact under light loads, and insufficient return or excessively long return time under heavy loads, affecting work efficiency. Moreover, although the direct hydraulic cylinder drive method can provide a large return force, the continuous operation of the hydraulic cylinder under no-load or light-load conditions consumes a lot of unnecessary energy, increasing the operating cost of the equipment. Furthermore, under heavy-load conditions, the hydraulic support contains a large amount of elastic potential energy during the return process, which traditional automatic return devices often cannot effectively recover, resulting in energy waste. Summary of the Invention

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0005] To achieve the above effects, the technical solution adopted by the present invention is as follows: an automatic return device for a control valve group applied to a hydraulic support, the automatic return device for the hydraulic support includes: a base, an installation groove fixedly connected to the upper surface of the base, a first fixing plate fixedly connected to the left and right sides of the upper surface of the installation groove, a first connecting rod movably connected inside the first fixing plate, a first movable block movably connected to the outer wall of the first connecting rod, a pair of telescopic rods fixedly connected to the upper surface of the first movable block, two pairs of first fixing rods movably arranged inside the base and on the side near the installation groove, a tail plate and a top beam fixedly connected to the upper surfaces of the two pairs of first fixing rods respectively, a sliding groove opened inside the top beam, and a light load mechanism, a heavy load mechanism, a biting mechanism, a tensioning mechanism and an adjustment mechanism arranged sequentially from back to front inside the sliding groove.

[0006] Preferably, the light-load mechanism includes a first mounting plate, which is movably disposed on the rear side inside the slide groove. A groove is formed inside the upper surface of the first mounting plate, and a bidirectional drive motor is fixedly connected inside the groove. The output shafts on the left and right sides of the bidirectional drive motor are fixedly connected to a first rotating shaft via couplings. An electromagnetic clutch is fixedly connected to one output end of the first rotating shaft, and a second rotating shaft is fixedly connected to one output end of the electromagnetic clutch via couplings. A harmonic gear is fixedly connected to one output end of the second rotating shaft, and a third rotating shaft is fixedly connected to one side inside the harmonic gear. A roller is fixedly connected to one output end of the third rotating shaft. Racks are fixedly connected to the left and right sides inside the slide groove, and the racks mesh with the rollers. A pair of second fixed plates are fixedly connected to the lower surface of the first mounting plate. A second connecting rod is movably connected to one side of the second fixed plate, and a second movable block is movably connected to the outer wall of the second connecting rod, and the second movable block is fixedly connected to the output end of the telescopic rod.

[0007] Preferably, the heavy-duty mechanism includes a placement plate, a placement plate is fixedly installed on the front side inside the slide groove, a lead screw is rotatably connected to the left and right sides of the placement plate, a slider is threadedly connected to the outer wall of the lead screw, a second mounting plate is fixedly connected to the lower surface of the slider, a first rotating shaft is rotatably connected to one side of the placement plate, a pulley is fixedly connected to the outer wall of the lead screw and the first rotating shaft, a limit ring is fixedly connected to the output end of one side of the lead screw and the first rotating shaft, a prestressed bow-shaped spring is movably connected between the second mounting plate and the placement plate, and a prestressed bow-shaped spring is provided on one side of both the second mounting plate and the first mounting plate, a rotating motor is fixedly connected to one side of the placement plate, and the output end of the rotating motor is fixedly connected to the first rotating shaft through a coupling.

[0008] Preferably, the engagement mechanism includes an outer ratchet, an outer ratchet is provided on one side of the placement plate, an inner ratchet is movably connected inside the outer ratchet, return springs are movably connected to the left and right sides of the inner ratchet, a pawl is fixedly connected to the output end of the upper surface of the return spring, a first fixed shaft is movably connected to one side of the outer ratchet, and a synchronous motor is fixedly connected to the output end of one side of the first fixed shaft through a coupling, and a second fixed shaft is movably connected to one side of the inner ratchet.

[0009] Preferably, the tensioning mechanism includes a servo motor. A servo motor is provided on one side of the placement plate. The output end of one side of the servo motor is fixedly connected to a first rotating rod via a coupling. A first mounting plate is threadedly connected to the outer wall of the first rotating rod. A mounting rod is fixedly connected to one side of the first mounting plate. A second mounting plate is fixedly connected to one side of the mounting rod. A second rotating rod is fixedly connected to one side of the second mounting plate. A first connecting plate is fixedly connected to the output end of one side of the second rotating rod. A first rotating rod is fixedly connected around the first connecting plate. A second rotating rod is provided on one side of the first rotating rod. A second connecting plate is fixedly connected to one side of the second rotating rod. A third rotating rod is fixedly connected to one side of the second connecting plate via a coupling, and the third rotating rod is interconnected with a prestressed bow spring.

[0010] Preferably, the adjusting mechanism includes an adjusting block, an adjusting block is fixedly connected to one side of the mounting rod, a connecting shaft is fixedly connected to one side of the adjusting block, a first connecting plate is fixedly connected to the output end of one side of the connecting shaft, a second rotating shaft is movably connected inside the first connecting plate, a fixing block is movably connected to the outer wall of the second rotating shaft and is disposed inside the slide groove, a pulling rod is movably connected to one side of the fixing block and is fixedly connected to the second rotating shaft.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0012] 1. The light-load mechanism consists of a bidirectional drive motor, an electromagnetic clutch, harmonic gears, rollers, and a first mounting plate. The bidirectional drive motor, through the combination of the electromagnetic clutch and harmonic gears, can precisely control the movement of the rollers on the rack, enabling flexible movement of the hydraulic support control valve group under light-load conditions. The high transmission of the harmonic gears effectively amplifies the motor's output torque, reducing motor power requirements and no-load energy consumption while ensuring motion accuracy. The timely disengagement and engagement of the electromagnetic clutch avoids unnecessary power transmission, further improving energy utilization efficiency. The heavy-load mechanism consists of a rotating motor, a lead screw, a prestressed bow spring, and a mounting plate. The rotating motor drives the lead screw to rotate, moving the slider and the second mounting plate. The elastic energy storage and release function of the prestressed bow spring provides stable return power to the control valve group under heavy-load conditions. The preload of the prestressed bow spring can be adjusted according to the actual load, ensuring reliable return action under different heavy-load conditions. At the same time, the high precision of the lead screw transmission ensures the accuracy of the return position, improving the overall stability of the hydraulic support operation.

[0013] 2. The meshing mechanism consists of an outer ratchet, an inner ratchet, a return spring, a first fixed shaft, and a second fixed shaft. The outer and inner ratchets, in conjunction with the return spring and pawl, achieve precise control of the return process. A synchronous motor drives the outer ratchet to rotate, and the meshing of the pawl and inner ratchet ensures the return action is performed in the correct time and direction, preventing accidental slippage or reverse rotation during the return process. The tensioning mechanism consists of a servo motor, a first rotating rod, a first mounting plate, a second mounting plate, a second rotating rod, a third rotating rod, a first rotating rod, a second rotating rod, a first connecting plate, and a second connecting plate. The servo motor drives the first rotating rod, which in turn moves the mounting plate, rotating rod, and rotating rod, thereby adjusting the tension of the prestressed bow spring. This allows for adjustments based on different working conditions. Furthermore, the hydraulic support maintains good return performance under different load conditions. The adjustment mechanism, consisting of an adjustment block, connecting shaft, rotating shaft, fixed block, and pull rod, can adjust the tightening and loosening of the prestressed bow spring. Under different load conditions, by carefully collecting and adjusting the spring force, it ensures that the spring can always provide just the right amount of spring force support, making the return action of the hydraulic support's control valve group more precise and stable, greatly improving the operating accuracy and stability of the equipment. Moreover, under light load or specific working conditions, the adjustment mechanism can appropriately loosen the prestressed bow spring to reduce unnecessary spring force storage and reduce energy consumption, while under heavy load conditions, it can tighten the spring in time to collect and store sufficient spring force to meet the power required for return. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the main structure of an embodiment of the present invention;

[0016] Figure 2 This is a schematic diagram of the lightweight mechanism structure according to an embodiment of the present invention;

[0017] Figure 3 This is the present invention. Figure 2 A schematic diagram of the enlarged structure at point A in the middle;

[0018] Figure 4 This is a schematic diagram of the heavy-duty mechanism structure according to an embodiment of the present invention;

[0019] Figure 5 This is the present invention. Figure 4 A schematic diagram of the enlarged structure at point B;

[0020] Figure 6 This is a schematic diagram of the tensioning mechanism structure according to an embodiment of the present invention;

[0021] Figure 7 This is a schematic diagram of the biting mechanism structure according to an embodiment of the present invention;

[0022] Figure 8 This is a schematic diagram of the planar top view structure of an embodiment of the present invention.

[0023] In the diagram, 1. Base; 101. Mounting slot; 102. First fixing plate; 103. First connecting rod; 104. First movable block; 105. Telescopic rod; 106. First fixing rod; 107. Tail plate; 108. Top beam; 2. Slide groove; 3. First mounting plate; 301. Groove; 302. Bidirectional drive motor; 303. First rotating shaft; 304. Electromagnetic clutch; 305. Second rotating shaft; 306. Harmonic gear; 307. Third rotating shaft; 308. Roller; 309. Rack; 3010. Second fixing plate; 3011. Second connecting rod; 3012. Second movable block; 4. Placement plate; 401. Lead screw; 402. Slider; 403. Second mounting plate; 404. First rotating shaft ; 405, Pulley; 406, Limiting Ring; 407, Prestressed Bow Spring; 408, Rotating Motor; 5, Servo Motor; 501, First Rotating Rod; 502, First Mounting Plate; 503, Mounting Rod; 504, Second Mounting Plate; 505, Second Rotating Rod; 506, First Connecting Plate; 507, First Rotating Rod; 508, Second Rotating Rod; 509, Second Connecting Plate; 5010, Third Rotating Rod; 6, Adjusting Block; 601, Connecting Shaft; 602, First Connecting Plate; 603, Second Rotating Shaft; 604, Fixing Block; 605, Pulling Rod; 7, Outer Ratchet; 701, Inner Ratchet; 702, Return Spring; 703, Pawl; 704, First Fixed Shaft; 705, Second Fixed Shaft. Detailed Implementation

[0024] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0025] Example 1:

[0026] Please see Figures 1 to 8 As shown, this embodiment discloses an automatic return device for a control valve group applied to a hydraulic support. The automatic return device for the hydraulic support includes: a base 1, an installation groove 101 fixedly connected to the upper surface of the base 1, a first fixing plate 102 fixedly connected to the left and right sides of the upper surface of the installation groove 101, a first connecting rod 103 movably connected inside the first fixing plate 102, a first movable block 104 movably connected to the outer wall of the first connecting rod 103, a pair of telescopic rods 105 fixedly connected to the upper surface of the first movable block 104, two pairs of first fixing rods 106 movably arranged inside the base 1 and on the side near the installation groove 101, a tail plate 107 and a top beam 108 fixedly connected to the upper surfaces of the two pairs of first fixing rods 106 respectively, a sliding groove 2 opened inside the top beam 108, and a light load mechanism, a heavy load mechanism, a biting mechanism, a tensioning mechanism and an adjustment mechanism arranged sequentially from back to front inside the sliding groove 2.

[0027] Preferably, the light-load mechanism includes a first mounting plate 3. The first mounting plate 3 is movably mounted on the rear side of the slide groove 2. A groove 301 is formed inside the upper surface of the first mounting plate 3. A bidirectional drive motor 302 is fixedly connected inside the groove 301. The output shafts on both sides of the bidirectional drive motor 302 are fixedly connected to a first rotating shaft 303 via couplings. An electromagnetic clutch 304 is fixedly connected to one output end of the first rotating shaft 303. A second rotating shaft 305 is fixedly connected to one output end of the electromagnetic clutch 304 via a coupling. A harmonic gear 306 is fixedly connected to one output end of the second rotating shaft 305. A third rotating shaft 307 is fixedly connected to one side of the harmonic gear 306. A roller 308 is fixedly connected to one output end of the third rotating shaft 307. Racks 309 are fixedly connected to the left and right sides of the slide groove 2, and the racks 309 are... The rollers 308 are engaged. A pair of second fixed plates 3010 are fixedly connected to the lower surface of the first mounting plate 3. A second connecting rod 3011 is movably connected to one side of the second fixed plate 3010. A second movable block 3012 is movably connected to the outer wall of the second connecting rod 3011. The second movable block 3012 is fixedly connected to the output end of the telescopic rod 105. When the bidirectional drive motor 302 starts, its left and right output shafts drive the first rotating shaft 303 to rotate through the coupling. The first rotating shaft 303 transmits power to the electromagnetic clutch 304. The electromagnetic clutch 304 can engage or disengage as needed according to the working conditions. When engaged, it transmits power to the second rotating shaft 305. The second rotating shaft 305 drives the harmonic gear 306 to rotate. The harmonic gear 306 further drives the third rotating shaft 307 to rotate. The third rotating shaft 307 drives the rollers 308 to rotate. Since the roller 308 is meshed with the racks 309 on the left and right sides inside the slide groove 2, the rotation of the roller 308 causes it to move along the racks 309, thereby driving the first mounting plate 3 to move within the slide groove 2. Secondly, the bidirectional drive motor 302 provides power so that the high transmission ratio characteristic of the harmonic gear 306 can amplify the torque, making the movement of the control valve group more flexible under light load conditions. Moreover, the timely engagement and disengagement function of the electromagnetic clutch 304 can cut off the power transmission when movement is not required, reducing no-load energy consumption and improving energy utilization efficiency.

[0028] Preferably, the heavy-duty mechanism includes a placement plate 4. A placement plate 4 is fixedly mounted on the front side inside the slide 2. Lead screws 401 are rotatably connected to the left and right sides of the placement plate 4. A slider 402 is threaded onto the outer wall of the lead screw 401. A second mounting plate 403 is fixedly connected to the lower surface of the slider 402. A first rotating shaft 404 is rotatably connected to one side of the placement plate 4. A pulley 405 is fixedly connected to the outer walls of the lead screw 401 and the first rotating shaft 404. A limit ring 406 is fixedly connected to the output end of one side of the lead screw 401 and the first rotating shaft 404. A prestressed bow-shaped spring 407 is movably connected between the second mounting plate 403 and the placement plate 4, and prestressed bow-shaped springs 407 are provided on one side of both the second mounting plate 403 and the first mounting plate 404. A rotating motor 408 is fixedly connected to one side of the placement plate 4, and the output end of the rotating motor 408 is connected to the first mounting plate 404 via a coupling. A rotating shaft 404 is fixedly connected. When the rotating motor 408 is started, its output end drives the first rotating shaft 404 to rotate through a coupling. The first rotating shaft 404 and the outer wall of the lead screw 401 are connected through a pulley 405. Therefore, the rotation of the first rotating shaft 404 drives the lead screw 401 to rotate. A slider 402 is threadedly connected to the outer wall of the lead screw 401. The rotation of the lead screw 401 causes the slider 402 to move along the lead screw 401. The slider 402 drives the second mounting plate 403 to move. A prestressed bow spring 407 is movably connected between the second mounting plate 403 and the placement plate 4. The movement of the second mounting plate 403 will compress or stretch the prestressed bow spring 407, storing or releasing elastic potential energy. Furthermore, under heavy load conditions, the prestressed bow spring 407 can store elastic potential energy and release energy when it needs to return to its original position, assisting the control valve group to return to its original position quickly, improving the return speed and efficiency.

[0029] Preferably, the engagement mechanism includes an outer ratchet 7, which is disposed on one side of the placement plate 4. An inner ratchet 701 is movably connected inside the outer ratchet 7. Return springs 702 are movably connected to the left and right sides of the inner ratchet 701. A pawl 703 is fixedly connected to the output end of the upper surface of the return spring 702. A first fixed shaft 704 is movably connected to one side of the outer ratchet 7, and a synchronous motor is fixedly connected to the output end of one side of the first fixed shaft 704 via a coupling. A second fixed shaft 705 is movably connected to one side of the inner ratchet 701. When the synchronous motor is started, it drives the outer ratchet 701 to rotate via the first fixed shaft 704, and the inner ratchet 701 rotates. 1. The ratchet 7 is movably connected inside the outer ratchet 7. The return spring 702 provides a return force to the pawl 703, causing the pawl 703 to mesh with specific teeth of the inner ratchet 701 and the outer ratchet 7. When the outer ratchet 7 rotates, the meshing action of the pawl 703 and the inner ratchet 701 can realize one-way transmission or locking function, preventing accidental slippage or reverse rotation during the return process. The meshing mechanism ensures that the return action is carried out in the correct time and direction, improving the reliability and safety of the return process. Moreover, under heavy load or complex working conditions, it can effectively prevent the control valve group from undergoing undesirable displacement due to external forces, ensuring the normal operation of the hydraulic support.

[0030] Preferably, the tensioning mechanism includes a servo motor 5. A servo motor 5 is mounted on one side of the placement plate 4. A first rotating rod 501 is fixedly connected to the output end of one side of the servo motor 5 via a coupling. A first mounting plate 502 is threaded onto the outer wall of the first rotating rod 501. A mounting rod 503 is fixedly connected to one side of the first mounting plate 502. A second mounting plate 504 is fixedly connected to one side of the mounting rod 503. A second rotating rod 505 is fixedly connected to one side of the second mounting plate 504. A first connecting plate 506 is fixedly connected to the output end of one side of the second rotating rod 505. A first rotating rod 507 is fixedly connected around the perimeter of the first connecting plate 506. A second rotating rod 507 is provided on one side of the first rotating rod 507. A second connecting plate 509 is fixedly connected to one side of the second rotating rod 508. A third rotating rod 5010 is fixedly connected to one side of the second connecting plate 509 via a coupling. The third rotating rod 5010 is connected to a prestressed bow spring 407. When the servo motor 5 starts, its output end drives the first rotating rod 501 to rotate via a coupling. A first mounting plate 502 is threadedly connected to the outer wall of the first rotating rod 501. The rotation of the first rotating rod 501 causes the first mounting plate 502 to move along its axial direction. The first mounting plate 502 drives the second mounting plate 504 to move via the mounting rod 503. The second mounting plate 504 drives the second rotating rod 505 and the first connecting plate 506 to move. The first rotating rod 507 and the second rotating rod 508 on the first connecting plate 506 interact with each other. The second rotating rod 508 drives the second connecting plate 509 and the third rotating rod 5010 to move, thereby realizing the tightening or loosening of the prestressed bow spring 407. The tension of the prestressed bow spring 407 is adjusted in real time according to different working conditions to optimize the elastic characteristics of the spring and enable the hydraulic support to maintain good return performance under different load conditions.

[0031] Preferably, the adjusting mechanism includes an adjusting block 6, an adjusting block 6 is fixedly connected to one side of the mounting rod 503, a connecting shaft 601 is fixedly connected to one side of the adjusting block 6, a first connecting plate 602 is fixedly connected to the output end of one side of the connecting shaft 601, a second rotating shaft 603 is movably connected inside the first connecting plate 602, a fixing block 604 is movably connected to the outer wall of the second rotating shaft 603, and the fixing block 604 is disposed inside the slide groove 2. A pulling rod 605 is movably connected to one side of the fixing block 604. 5 is fixedly connected to the second rotating shaft 603. When the prestressed bow spring 407 needs to be adjusted, the operator applies a pulling or pushing force to the pull rod 605, and the second rotating shaft 603 undergoes linear adjustment. The movement of the second rotating shaft 603 drives the first connecting plate 602 to move together. The movement of the first connecting plate 602 is transmitted to the connecting shaft 601, which connects the first connecting plate 602 and the adjusting block 6. The movement of the adjusting block 6 will separate the tensioning mechanism, thereby relaxing or tightening the prestressed bow spring 407.

[0032] Working principle: The first mounting plate 3 of the light load mechanism is located behind the slide 2. The prestressed bow spring 407 of the heavy load mechanism is in a certain pre-tightened state. The inner ratchet 701 and the outer ratchet 7 of the biting mechanism are in a normal biting state. The tensioning mechanism sets the tension of the prestressed bow spring 407 according to the initial working conditions. The adjusting block 6 and other components of the adjusting mechanism are in the corresponding positions.

[0033] When the valve group needs to be moved under light load conditions, the bidirectional drive motor 302 starts, and its left and right output shafts drive the first rotating shaft 303 to rotate through the coupling. The first rotating shaft 303 transmits power to the electromagnetic clutch 304. The electromagnetic clutch 304 engages and transmits power to the second rotating shaft 305. The second rotating shaft 305 drives the harmonic gear 306 to rotate. The harmonic gear 306 amplifies the torque due to its high transmission ratio, further driving the third rotating shaft 307 to rotate. The third rotating shaft 307 drives the roller 308 to rotate. Since the roller 308 is meshed with the racks 309 on the left and right sides inside the slide groove 2, the rotation of the roller 308 causes it to move along the racks 309, thereby driving the first mounting plate 3 to move forward in the slide groove 2, realizing the flexible movement of the control valve group under light load conditions. Moreover, when movement is not required, the electromagnetic clutch 304 disengages, cutting off the power transmission and reducing no-load energy consumption.

[0034] When entering heavy-load conditions, the rotating motor 408 starts, and its output end drives the first rotating shaft 404 to rotate through the coupling. The first rotating shaft 404 and the outer wall of the lead screw 401 are connected through the pulley 405. Therefore, the rotation of the first rotating shaft 404 drives the lead screw 401 to rotate. The outer wall of the lead screw 401 is threaded with a slider 402. The rotation of the lead screw 401 causes the slider 402 to move along the lead screw 401. The slider 402 drives the second mounting plate 403 to move. The second mounting plate 403 and the placement plate 4 are movably connected to a prestressed bow spring 407. The movement of the second mounting plate 403 compresses the prestressed bow spring 407 and stores elastic potential energy. When it is necessary to return to the original position, the prestressed bow spring 407 releases the elastic potential energy to assist the control valve group to return to the original position quickly.

[0035] When the synchronous motor starts, it drives the outer ratchet 7 to rotate through the first fixed shaft 704. The inner ratchet 701 is movably connected inside the outer ratchet 7. The return spring 702 provides a return force to the pawl 703, so that the pawl 703 meshes with specific teeth of the inner ratchet 701 and the outer ratchet 7. When the outer ratchet 7 rotates, the meshing action of the pawl 703 and the inner ratchet 701 can realize one-way transmission or locking function, prevent accidental slippage or reverse rotation during the return process, and ensure that the return action is carried out in the correct time and direction. Under heavy load or complex working conditions, it effectively prevents the control valve group from undergoing undesirable displacement due to external force, and ensures the normal operation of the hydraulic support.

[0036] When the servo motor 5 starts, its output end drives the first rotating rod 501 to rotate via a coupling. The first rotating rod 501 is threadedly connected to the outer wall of the first mounting plate 502. The rotation of the first rotating rod 501 causes the first mounting plate 502 to move along its axial direction. The first mounting plate 502 drives the second mounting plate 504 to move via the mounting rod 503. The second mounting plate 504 drives the second rotating rod 505 and the first connecting plate 506 to move. The first rotating rod 507 and the second rotating rod 508 on the first connecting plate 506 interact with each other. The second rotating rod 508 drives the second connecting plate 509 and the third rotating rod 5010 to move, thereby realizing the tightening or loosening operation of the prestressed bow spring 407. The tightness of the prestressed bow spring 407 can be adjusted in real time according to different working conditions. When it is necessary to adjust the prestressed bow spring 407;

[0037] When the operator applies a pulling or pushing force to the pull rod 605, the second rotating shaft 603 undergoes linear adjustment. The movement of the second rotating shaft 603 drives the first connecting plate 602 to move together. The movement of the first connecting plate 602 is transmitted to the connecting shaft 601. The connecting shaft 601 connects the first connecting plate 602 and the adjusting block 6. The movement of the adjusting block 6 will affect the tensioning mechanism, causing the tensioning mechanism to separate, thereby causing the prestressed bow spring 407 to relax or tighten its elasticity.

[0038] Example 2:

[0039] Please see Figures 2 to 6As shown, the difference from Embodiment 1 is that the light-load mechanism includes a first mounting plate 3. The first mounting plate 3 is movably disposed on the rear side inside the slide groove 2. A groove 301 is formed inside the upper surface of the first mounting plate 3. A bidirectional drive motor 302 is fixedly connected inside the groove 301. The output shafts on the left and right sides of the bidirectional drive motor 302 are fixedly connected to a first rotating shaft 303 through a coupling. An electromagnetic clutch 304 is fixedly connected to the output end on one side of the first rotating shaft 303. The output end on one side of the electromagnetic clutch 304 is connected to a coupling. A second rotating shaft 305 is fixedly connected. A harmonic gear 306 is fixedly connected to one output end of the second rotating shaft 305. A third rotating shaft 307 is fixedly connected to one side inside the harmonic gear 306. A roller 308 is fixedly connected to one output end of the third rotating shaft 307. A rack 309 is fixedly connected to the left and right sides inside the slide groove 2, and the rack 309 meshes with the roller 308. A pair of second fixing plates 3010 are fixedly connected to the lower surface of the first mounting plate 3. A second connecting rod 30 is movably connected to one side of the second fixing plate 3010. 11. A second movable block 3012 is movably connected to the outer wall of the second connecting rod 3011, and the second movable block 3012 is fixedly connected to the output end of the telescopic rod 105. An electromagnetic clutch 304 is provided therein. During operation, when it is necessary to control the movement of the valve group under light load conditions, the bidirectional drive motor 302 starts. The output shafts on the left and right sides of the bidirectional drive motor 302 drive the first rotating shaft 303 to rotate through the coupling. The first rotating shaft 303 transmits power to the electromagnetic clutch 304. At this time, the electromagnetic clutch 304 engages, thus... The power is further transmitted to the second rotating shaft 305, which drives the harmonic gear 306 to rotate. The harmonic gear 306 amplifies the torque due to its high transmission ratio, thereby driving the third rotating shaft 307 to rotate. The third rotating shaft 307 drives the roller 308 to rotate. Since the roller 308 is meshed with the racks 309 on the left and right sides inside the slide groove 2, the rotation of the roller 308 causes it to move along the racks 309, thereby driving the first mounting plate 3 to move forward in the slide groove 2, realizing the flexible movement of the control valve group under light load conditions.

[0040] Preferably, the heavy-duty mechanism includes a placement plate 4. A placement plate 4 is fixedly mounted on the front side inside the slide 2. Lead screws 401 are rotatably connected to the left and right sides of the placement plate 4. A slider 402 is threaded onto the outer wall of the lead screw 401. A second mounting plate 403 is fixedly connected to the lower surface of the slider 402. A first rotating shaft 404 is rotatably connected to one side of the placement plate 4. A pulley 405 is fixedly connected to the outer walls of the lead screw 401 and the first rotating shaft 404. A limit ring 406 is fixedly connected to the output end of one side of the lead screw 401 and the first rotating shaft 404. A prestressed bow-shaped spring 407 is movably connected between the second mounting plate 403 and the placement plate 4, and prestressed bow-shaped springs 407 are provided on one side of both the second mounting plate 403 and the first mounting plate 404. A rotating motor 408 is fixedly connected to one side of the placement plate 4, and the output end of the rotating motor 408... The first rotating shaft 404 is fixedly connected to the first rotating shaft 404 via a coupling. Under heavy load conditions, the rotating motor 408 starts, and the output end of the rotating motor 408 drives the first rotating shaft 404 to rotate via the coupling. The first rotating shaft 404 and the outer wall of the lead screw 401 are connected via a pulley 405. Therefore, the rotation of the first rotating shaft 404 drives the lead screw 401 to rotate. The outer wall of the lead screw 401 is threaded with a slider 402. The rotation of the lead screw 401 causes the slider 402 to move along the lead screw 401. The slider 402 drives the second mounting plate 403 to move. A prestressed bow spring 407 is movably connected between the second mounting plate 403 and the placement plate 4. The movement of the second mounting plate 403 compresses the prestressed bow spring 407 and stores elastic potential energy. When it is necessary to return to its original position, the prestressed bow spring 407 releases its elastic potential energy to assist the control valve group in returning to its original position quickly.

[0041] The tensioning mechanism includes a servo motor 5. A servo motor 5 is mounted on one side of the placement plate 4. The output end of one side of the servo motor 5 is fixedly connected to a first rotating rod 501 via a coupling. A first mounting plate 502 is threaded onto the outer wall of the first rotating rod 501. A mounting rod 503 is fixedly connected to one side of the first mounting plate 502. A second mounting plate 504 is fixedly connected to one side of the mounting rod 503. A second rotating rod 505 is fixedly connected to one side of the second mounting plate 504. A first connecting plate 506 is fixedly connected to the output end of one side of the second rotating rod 505. A first rotating rod 507 is fixedly connected around the first connecting plate 506. A second rotating rod 508 is mounted on one side of the first rotating rod 507. A second connecting plate 509 is fixedly connected to one side of the second rotating rod 508. A third rotating rod 5010 is fixedly connected to one side of the second connecting plate 509 via a coupling. The third rotating rod 5010 is connected to the prestressed bow spring 407. During operation, the tension of the prestressed bow spring 407 is adjusted in real time according to different working conditions. The servo motor 5 starts, and its output end drives the first rotating rod 501 to rotate through the coupling. The first mounting plate 502 is threadedly connected to the outer wall of the first rotating rod 501. The rotation of the first rotating rod 501 causes the first mounting plate 502 to move along its axial direction. The first mounting plate 502 drives the second mounting plate 504 to move through the mounting rod 503. The second mounting plate 504 drives the second rotating rod 505 and the first connecting plate 506 to move. The first rotating rod 507 and the second rotating rod 508 on the first connecting plate 506 interact with each other. The second rotating rod 508 drives the second connecting plate 509 and the third rotating rod 5010 to move, thereby realizing the tightening or loosening operation of the prestressed bow spring 407.

[0042] Preferably, the adjusting mechanism includes an adjusting block 6. An adjusting block 6 is fixedly connected to one side of the mounting rod 503. A connecting shaft 601 is fixedly connected to one side of the adjusting block 6. A first connecting plate 602 is fixedly connected to the output end of one side of the connecting shaft 601. A second rotating shaft 603 is movably connected inside the first connecting plate 602. A fixing block 604 is movably connected to the outer wall of the second rotating shaft 603, and the fixing block 604 is disposed inside the slide groove 2. A pulling rod 605 is movably connected to one side of the fixing block 604, and the pulling rod 605 is fixedly connected to the second rotating shaft 603. When the prestressed bow spring 407 needs adjustment, the operator applies a pulling or pushing force to the pull rod 605. The pull rod 605 is fixedly connected to the second rotating shaft 603, so the second rotating shaft 603 undergoes linear adjustment. The movement of the second rotating shaft 603 drives the first connecting plate 602 to move together. The movement of the first connecting plate 602 is transmitted to the adjusting block 6 through the second connecting shaft 601. The movement of the adjusting block 6 will affect the tensioning mechanism, causing the tensioning mechanism to separate, thereby causing the prestressed bow spring 407 to relax or tighten its elasticity.

[0043] Working principle: Under light load conditions, the light load mechanism starts, and the bidirectional drive motor 302 drives the first rotating shaft 303, electromagnetic clutch 304, second rotating shaft 305, harmonic gear 306, and third rotating shaft 307 to rotate, which ultimately causes the roller 308 to roll on the rack 309, driving the first mounting plate 3 to move forward, while the placement plate 4 in the heavy load mechanism remains stationary, and the light load mechanism is connected to the heavy load mechanism using a meshing mechanism;

[0044] When the light-load task is completed and the device needs to return to its original position, the bidirectional drive motor 302 reverses, driving the roller 308 to rotate in the opposite direction via the first rotating shaft 303, electromagnetic clutch 304, second rotating shaft 305, harmonic gear 306, and third rotating shaft 307. The roller 308 meshes with the rack 309, causing the first mounting plate 3 to move in the opposite direction along the rack 309, thus returning to its original position. At this time, the first mounting plate 3 itself does not actively generate moving power, but relies on the bidirectional drive motor 302 of the light-load mechanism to drive the first rotating shaft 303 and other structures to return to its original position.

[0045] When the light-load mechanism needs to return to its original position, the bidirectional drive motor 302 reverses and drives the roller 308 to rotate in the opposite direction through the transmission structure, causing the first mounting plate 3 to move in the opposite direction along the rack 309. At this time, the first mounting plate 3 is in a stationary state and returns to its original position by relying on the contact between the transmission structure and the roller 308 and the reverse power of the bidirectional drive motor 302.

[0046] Under heavy load conditions, the rotary motor 408 of the heavy load mechanism starts. The output end of the rotary motor 408 drives the first rotary shaft 404 to rotate through the coupling. The first rotary shaft 404 and the outer wall of the lead screw 401 are connected through the pulley 405. Therefore, the rotation of the first rotary shaft 404 drives the lead screw 401 to rotate. The outer wall of the lead screw 401 is threaded with a slider 402. The rotation of the lead screw 401 causes the slider 402 to move along the lead screw 401. The slider 402 drives the second mounting plate 403 to move. The second mounting plate 403 and the placement plate 4 are movably connected to a prestressed bow spring 407. The movement of the second mounting plate 403 compresses the prestressed bow spring 407 and stores elastic potential energy.

[0047] During normal operation under heavy load, the placement plate 4 of the heavy load mechanism and the first mounting plate 3 of the light load mechanism move simultaneously to adapt to the working requirements under heavy load. At this time, the transmission structure of the heavy load mechanism, such as the rotating motor 408 and the lead screw 401, works normally, but is subject to certain limiting components such as the limit ring 406 to ensure that its movement range and speed are within a reasonable range. Meanwhile, the transmission structure of the light load mechanism, such as the bidirectional drive motor 302, remains stationary and does not participate in the movement drive under heavy load.

[0048] The operator moves the adjustment mechanism of the heavy-duty mechanism by pulling the lever 605. The lever 605 is fixedly connected to the second rotating shaft 603, so the second rotating shaft 603 is linearly adjusted. The movement of the second rotating shaft 603 drives the first connecting plate 602 to move together. The movement of the first connecting plate 602 is transmitted to the adjustment block 6 through the second connecting shaft 601. The movement of the adjustment block 6 will affect the tensioning mechanism, causing the tensioning mechanism to separate, thereby relaxing the prestressed bow spring 407, releasing the stored elastic potential energy, and assisting the heavy-duty mechanism to return to its position quickly.

[0049] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0050] This invention is not limited to the optional embodiments described above, and anyone can derive other various forms of products based on the inspiration of this invention. The specific embodiments described above should not be construed as limiting the scope of protection of this invention; the scope of protection of this invention should be determined by the claims, and the specification can be used to interpret the claims.

Claims

1. An automatic return device for a control valve assembly used in a hydraulic support, comprising: The base (1) and the slide (2) are characterized in that the interior of the slide (2) is provided with a light load mechanism, a heavy load mechanism, a biting mechanism, a tightening mechanism and an adjusting mechanism in sequence from back to front; The light-load mechanism includes a first mounting plate (3), the upper surface of which has a groove (301) inside. A bidirectional drive motor (302) is fixedly connected inside the groove (301). The output shafts on the left and right sides of the bidirectional drive motor (302) are fixedly connected to a first rotating shaft (303). An electromagnetic clutch (304) is fixedly connected to one side of the first rotating shaft (303). A second rotating shaft (305) is fixedly connected to one side of the electromagnetic clutch (304). A harmonic gear (306) is fixedly connected to one side of the second rotating shaft (305). A third rotating shaft (307) is fixedly connected to one side of the inside of the harmonic gear (306). A roller (308) is fixedly connected to one side of the output of the third rotating shaft (307). A rack (309) is fixedly connected to the left and right sides inside the slide groove (2).

2. The automatic return device for a control valve group applied to a hydraulic support according to claim 1, characterized in that: The upper surface of the base (1) is fixedly connected to an installation groove (101). The left and right sides of the upper surface of the installation groove (101) are fixedly connected to a first fixing plate (102). The interior of the first fixing plate (102) is movably connected to a first connecting rod (103). The outer wall of the first connecting rod (103) is movably connected to a first movable block (104). The upper surface of the first movable block (104) is fixedly connected to a pair of telescopic rods (105). The interior of the base (1) and the side close to the installation groove (101) are also movably provided with two pairs of first fixing rods (106). The upper surfaces of the two pairs of first fixing rods (106) are respectively fixedly connected to a tail plate (107) and a top beam (108). The interior of the top beam (108) is provided with a sliding groove (2). A first mounting plate (3) is movably disposed on the rear side inside the slide (2). A rack (309) is meshed with a roller (308). A pair of second fixing plates (3010) are fixedly connected to the lower surface of the first mounting plate (3). A second connecting rod (3011) is movably connected to one side of the second fixing plate (3010). A second movable block (3012) is movably connected to the outer wall of the second connecting rod (3011), and the second movable block (3012) is fixedly connected to the output end of the telescopic rod (105).

3. The automatic return device for a control valve group applied to a hydraulic support according to claim 1, characterized in that: The heavy-duty mechanism includes a placement plate (4). The placement plate (4) is fixedly installed on the front side inside the slide (2). A lead screw (401) is rotatably connected to the left and right sides of the placement plate (4). A slider (402) is threadedly connected to the outer wall of the lead screw (401). A second mounting plate (403) is fixedly connected to the lower surface of the slider (402). A first rotating shaft (404) is rotatably connected to one side of the placement plate (4). A pulley (404) is fixedly connected to the outer walls of the lead screw (401) and the first rotating shaft (404). 05), a limit ring (406) is fixedly connected to the output end of the lead screw (401) and the first rotating shaft (404) on one side, a prestressed bow spring (407) is movably connected between the second mounting plate (403) and the placement plate (4), and a prestressed bow spring (407) is provided on one side of both the second mounting plate (403) and the first mounting plate (3), a rotating motor (408) is fixedly connected to one side of the placement plate (4), and the output end of the rotating motor (408) is fixedly connected to the first rotating shaft (404).

4. The automatic return device for a control valve group applied to a hydraulic support according to claim 3, characterized in that: The engagement mechanism includes an outer ratchet (7), which is provided on one side of the placement plate (4). An inner ratchet (701) is movably connected inside the outer ratchet (7). Return springs (702) are movably connected to the left and right sides of the inner ratchet (701). A pawl (703) is fixedly connected to the output end of the upper surface of the return spring (702). A first fixed shaft (704) is movably connected to one side of the outer ratchet (7), and a synchronous motor is fixedly connected to the output end of one side of the first fixed shaft (704). A second fixed shaft (705) is movably connected to one side of the inner ratchet (701).

5. The automatic return device for a control valve group applied to a hydraulic support according to claim 3, characterized in that: The tightening mechanism includes a servo motor (5). A servo motor (5) is provided on one side of the placement plate (4). A first rotating rod (501) is fixedly connected to the output end of one side of the servo motor (5). A first mounting plate (502) is threadedly connected to the outer wall of the first rotating rod (501). A mounting rod (503) is fixedly connected to one side of the first mounting plate (502). A second mounting plate (504) is fixedly connected to one side of the mounting rod (503). A second rotating rod (504) is fixedly connected to one side of the second mounting plate (504). 5) A first connecting plate (506) is fixedly connected to the output end of the second rotating rod (505). A first rotating rod (507) is fixedly connected around the first connecting plate (506). A second rotating rod (508) is provided on one side of the first rotating rod (507). A second connecting plate (509) is fixedly connected to one side of the second rotating rod (508). A third rotating rod (5010) is fixedly connected to one side of the second connecting plate (509). The third rotating rod (5010) is connected to the prestressed bow spring (407).

6. The automatic return device for a control valve group applied to a hydraulic support according to claim 5, characterized in that: The adjustment mechanism includes an adjustment block (6), an adjustment block (6) is fixedly connected to one side of the mounting rod (503), a connecting shaft (601) is fixedly connected to one side of the adjustment block (6), a first connecting plate (602) is fixedly connected to the output end of one side of the connecting shaft (601), a second rotating shaft (603) is movably connected inside the first connecting plate (602), a fixing block (604) is movably connected to the outer wall of the second rotating shaft (603), and the fixing block (604) is disposed inside the slide groove (2), a pulling rod (605) is movably connected to one side of the fixing block (604), and the pulling rod (605) is fixedly connected to the second rotating shaft (603).

Images