Hydraulic support based on self-adjustment of gravity center and control method thereof

Abstract

The present invention discloses a hydraulic support based on self-adjustment of the center of gravity and a control method thereof. The hydraulic support based on self-adjustment of the center of gravity comprises a base, a top support component, a first counterweight component, a top push drive component and a flip drive component. The first counterweight component comprises a first counterweight component and a support rod, the support rod is slidably arranged on the base, the first counterweight component is rotatably connected to the end of the support rod and is located at one end of the base, and the first counterweight component is movable along a first direction relative to the base; the top push drive component is arranged between the first counterweight component and the base; the flip drive component is arranged between the first counterweight component and the base, and the flip drive component is used to drive the first counterweight component to rotate relative to the support rod, so that the first counterweight component abuts against the ground, or the first counterweight component is separated from the ground. The present invention can optimize the force of the hydraulic support, improve the stability performance under pressure, and prevent the hydraulic support from tilting or tipping.

Description

Technical Field

[0001] The invention belongs to the technical field of coal mining equipment, and in particular relates to a hydraulic support based on self-adjustment of the center of gravity and a control method thereof. Background Art

[0002] Hydraulic supports are used to bear the mine pressure of the coal mining face, which can not only ensure the safety of miners and improve the safety production level of the mine, but also improve the efficiency and economic benefits of coal mining. The mine pressure of the mining face acts on the hydraulic supports in the form of external loads. In the mechanical system of the interaction between the hydraulic supports and the surrounding rock of the mining face, the combined force of the supporting parts of the hydraulic supports and the combined force of the external load acting on the hydraulic supports by the roof determine the structural stability of the hydraulic supports.

[0003] In the related technology, when the width of the coal mining working face increases, the top support components of the hydraulic support will also extend in the expansion direction accordingly to ensure that the top support width matches the width of the roof, thereby improving the support effect on the roof. At this time, the center of gravity of the top support components will shift in the extension direction of the hydraulic support. If the coal seam above the roof at the end of the top support component collapses, it will easily cause the entire hydraulic support to tilt or even fall over, thereby affecting the overall stability of the support and posing a safety risk. Summary of the invention

[0004] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] To this end, an embodiment of the present invention proposes a hydraulic support based on self-adjustment of the center of gravity, which can optimize the force of the hydraulic support, improve the stability performance when under pressure, and prevent the hydraulic support from tilting or tipping over.

[0006] The embodiment of the present invention further provides a hydraulic support control method based on self-adjustment of the center of gravity.

[0007] The hydraulic support based on self-adjustment of the center of gravity of the embodiment of the present invention comprises a base and a top support component;

[0008] Also includes:

[0009] A first counterweight assembly, the first counterweight assembly comprising a first counterweight component and a support rod, the support rod being slidably disposed on the base, the first counterweight component being rotatably connected to an end of the support rod and located at one end of the base, and the first counterweight component being movable relative to the base along a first direction;

[0010] A push drive assembly, the push drive assembly is arranged between the first counterweight component and the base to adjust the first counterweight component to move in a direction away from the base or in a direction close to the base;

[0011] A flip driving assembly is arranged between the first counterweight component and the base, and is used to drive the first counterweight component to rotate relative to the support rod so that the first counterweight component abuts against the ground or separates from the ground.

[0012] The present invention can optimize the force of the hydraulic support, improve the stability performance when under pressure, and prevent the hydraulic support from tilting or tipping over.

[0013] In some embodiments, the push drive assembly includes:

[0014] A lead screw, a nut is fixed on the base, the lead screw is matched and meshed with the nut, one end of the lead screw is rotatably connected to the first counterweight component, and the middle of the other end of the lead screw has a driving hole;

[0015] An inner sleeve rod, the inner sleeve rod is rotatably connected to the base, the inner sleeve rod is coaxially sleeved in the driving hole, the inner sleeve rod is movable along its axial direction in the driving hole, and the inner sleeve rod rotates synchronously with the lead screw;

[0016] A first driving part, wherein the first driving part is used to drive the inner sleeve rod to rotate.

[0017] In some embodiments, there are two lead screws arranged side by side, each of which is matched with the inner sleeve rod, a synchronous wheel is provided on the inner sleeve rod, and a driving wheel is provided at the output end of the first driving part, and the driving wheel and the synchronous wheel are synchronously driven through a transmission member.

[0018] In some embodiments, the first driving part is a driving motor or a power push rod;

[0019] Alternatively, the flip driving component is a driving motor or a power push rod.

[0020] In some embodiments, the first driving part includes a winding wheel, the winding wheel is supported on the base, a pull rope is provided on the winding wheel upper plate, the movable end of the pull rope is connected to the top support component, and the winding wheel is connected to the driving wheel by transmission, the top support component is lifted to drive the winding wheel to rotate along the unwinding direction through the pull rope, and the winding wheel has a reset component, and the reset component is used to drive the winding wheel to rotate along the winding direction;

[0021] Or, the transmission member is a belt or a chain;

[0022] Or, a deceleration component is provided between the first driving part and the driving wheel, or a deceleration component is provided between the driving wheel and the synchronous wheel;

[0023] Alternatively, the lead screw is connected to the first counterweight component via a universal joint.

[0024] In some embodiments, a second counterweight assembly is further included, which includes a second counterweight component and a driving rod. The second counterweight component is rotatably connected to the base, and the second counterweight component and the first counterweight component are arranged at corresponding ends of the base in the first direction. One end of the driving rod is fixedly connected to the second counterweight component, and the other end of the driving rod is connected to the flip driving assembly. The flip driving assembly is used to drive the second counterweight component to rotate relative to the base.

[0025] In some embodiments, the flip drive assembly includes:

[0026] A gear, wherein the gear is fixedly connected to the first counterweight component, the support rod and the first counterweight component are connected via a first rotating shaft, and the first rotating shaft and the gear are coaxially arranged;

[0027] a first push rod, the first push rod being slidably connected to the base, the first push rod having a rack section at one end close to the first counterweight component, the rack section being meshed with the gear;

[0028] a second push rod, the second push rod being slidably connected to the base, the second push rod having an end close to the second counterweight component having a pull ring extending in a vertical direction, the driving rod being arranged in the pull ring and being movable in the pull ring in a vertical direction;

[0029] A first elastic member is disposed between the first push rod and the second push rod.

[0030] In some embodiments, the second push rod comprises a first rod body and a second rod body, the first rod body is coaxially arranged with the first push rod, the second rod body is connected between the first rod body and the pull ring, the first rod body is a hollow sleeve, a sliding groove is arranged on the side wall of the first rod body, and a first stopper is arranged at one end of the first rod body away from the second rod body; the first push rod is sleeved in the first rod body, and a second stopper is arranged at one end of the first rod body away from the first counterweight component, and the second stopper is located on the outside of the first rod body, the connecting part between the second stopper and the first push rod is slidably arranged in the sliding groove, and the first elastic member is arranged between the first stopper and the second stopper;

[0031] Alternatively, the first elastic member is a spring, and two ends of the spring are fixedly connected to the first stop portion and the second stop portion respectively.

[0032] In some embodiments, the supporting component of the hydraulic support has an initial state, a first displacement state, and a second displacement state. The supporting component is deployed from the initial state to the first displacement state, the first counterweight component moves along a first direction to move away from the base, the supporting component moves from the first displacement state to the second displacement state, and the first counterweight component rotates relative to the base to abut against the ground.

[0033] When the supporting component is expanded from the initial state to the first displacement state, or moves from the first displacement state to the second displacement state, the second counterweight component rotates relative to the base to abut against the side wall of the surrounding rock.

[0034] The hydraulic support control method based on self-adjustment of the center of gravity of the embodiment of the present invention uses the hydraulic support based on self-adjustment of the center of gravity described in any of the above embodiments to perform center of gravity adjustment control, including the following steps:

[0035] The hydraulic support moves to the coal seam mining area, and the top support components of the hydraulic support are unfolded and contact with the surrounding rock;

[0036] Until the supporting member is unfolded to the first state, the first counterweight assembly is synchronously extended to adjust the center of gravity of the hydraulic support;

[0037] Continue to drive the top support component of the hydraulic support to expand to the second state, and flip the first counterweight component in the first counterweight assembly and the second counterweight component in the second counterweight assembly, so that the first counterweight component abuts against the ground and the second counterweight component abuts against the side wall of the surrounding rock. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic diagram of the three-dimensional structure of a hydraulic support based on self-adjustment of the center of gravity according to an embodiment of the present invention.

[0039] Figure 2 It is a front view structural schematic diagram of a hydraulic support based on self-adjustment of the center of gravity according to an embodiment of the present invention.

[0040] Figure 3 It is a schematic cross-sectional structural diagram of a hydraulic support based on self-adjustment of the center of gravity according to an embodiment of the present invention.

[0041] Figure 4 It is a schematic cross-sectional structural diagram of a hydraulic support based on self-adjustment of the center of gravity according to another embodiment of the present invention.

[0042] Figure 5 2 is a schematic diagram of the structure of the push drive assembly in an embodiment of the present invention.

[0043] Figure 6 It is a schematic diagram of the matching structure of the lead screw and the inner sleeve rod according to an embodiment of the present invention.

[0044] Figure 7 It is a schematic structural diagram of a second push rod and a second counterweight assembly according to an embodiment of the present invention.

[0045] Figure 8 It is a schematic diagram of the cooperation structure of the first push rod and the second push rod in an embodiment of the present invention.

[0046] Fig. 9 It is a schematic structural diagram of the first counterweight assembly abutting against the ground in an embodiment of the present invention.

[0047] Fig.10 It is a schematic structural diagram of a first counterweight assembly separated from the ground in an embodiment of the present invention.

[0048] Reference numerals:

[0049] 100. Hydraulic support;

[0050] 11. Base; 12. Top support component;

[0051] 2. first counterweight assembly; 21. first counterweight component; 22. first push rod; 23. first elastic member; 24. support rod; 25. rack segment; 26. gear;

[0052] 3. Push drive assembly; 31. Winding wheel; 32. Transmission member; 33. Driving wheel; 34. Synchronous wheel; 35. Inner sleeve rod; 36. Lead screw; 37. Screw nut;

[0053] 4. Second counterweight assembly; 41. Second counterweight component; 42. Driving rod; 43. Pull ring; 44. Second push rod; 441. First rod body; 442. Second rod body; 45. Sliding groove; 46. First stop portion; 47. Second stop portion. DETAILED DESCRIPTION

[0054] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0055] The following combination Figure 1-Figure 10 The hydraulic support based on self-adjustment of the center of gravity and the control method thereof according to the embodiment of the present invention are described in detail.

[0056] like Figure 1-Figure 10As shown, the hydraulic support 100 based on self-adjustment of the center of gravity of the embodiment of the present invention includes a base 11 and a top support component 12. The base 11 is supported by abutting against the ground, and the top support component 12 is supported by abutting against the side wall and the top plate of the surrounding rock. A connecting rod and a hydraulic cylinder are provided between the base 11 and the top support component 12, so that the top support component 12 can be unfolded and retracted. The top support component 12 has a plurality of top beam components, and adjacent top beam components are hinged, and hydraulic cylinders are also provided between adjacent top beam components for unfolding and retracting the top beam components to better adapt to the shape and size of the surrounding rock.

[0057] The hydraulic support 100 based on self-adjustment of the center of gravity of the embodiment of the present invention also includes a first counterweight assembly 2, a pushing drive assembly 3 and a flipping drive assembly. The first counterweight assembly 2 includes a first counterweight component 21 and a support rod 24. The support rod 24 is slidably arranged on the base 11. The first counterweight component 21 is rotatably connected to the end of the support rod 24 and is located at one end of the base 11. The first counterweight component 21 is movable along a first direction relative to the base 11.

[0058] The pushing drive assembly 3 is arranged between the first counterweight component 21 and the base 11 to adjust the first counterweight component 21 to move away from the base 11 or to move closer to the base 11. The flipping drive assembly is arranged between the first counterweight component 21 and the base 11. The flipping drive assembly is used to drive the first counterweight component 21 to rotate relative to the support rod 24 so that the first counterweight component 21 abuts against the ground or separates from the ground.

[0059] The first counterweight assembly 2 is arranged at one end of the base 11. When the first counterweight assembly 2 moves in a direction away from the base 11, the center of gravity of the hydraulic support 100 as a whole can be moved. The direction of movement of the center of gravity of the hydraulic support 100 is roughly the same as the expansion direction of the top support component 12. That is to say, after the multiple top beam components in the top support component 12 are expanded, the expansion size in the first direction can be increased. At this time, the center of gravity of the hydraulic support 100 will also move in the first direction. After being pushed into place by the top push drive assembly 3, the first counterweight component 21 is flipped by the flip drive assembly, so that the first counterweight component 21 is supported on the ground, ensuring that the first counterweight component 21 can also withstand a certain reverse force, so that the formation pressure borne by the expanded top support component 12 matches the reverse force of the ground borne by the base 11 and the first counterweight assembly 2, and the structural stability of the hydraulic support 100 is maintained.

[0060] The present invention can optimize the force of the hydraulic support 100, improve the stability performance when under pressure, and prevent the hydraulic support 100 from tilting or falling.

[0061] like Figure 3-Figure 5As shown, in some embodiments, the push drive assembly 3 includes a screw 36, an inner sleeve rod 35 and a first driving part. A nut 37 is fixed on the base 11, and the screw 36 is matched and meshed with the nut 37. One end of the screw 36 is rotatably connected to the first counterweight component 21, and the middle part of the other end of the screw 36 has a driving hole; the inner sleeve rod 35 is rotatably connected to the base 11, and the inner sleeve rod 35 is coaxially sleeved in the driving hole. The first driving part is used to drive the inner sleeve rod 35 to rotate, and the inner sleeve rod 35 rotates synchronously with the screw 36, and the screw 36 is movable relative to the inner sleeve rod 35 in its axial direction.

[0062] It should be understood that the embodiment of the present invention drives the first counterweight component 21 to move in the first direction by pushing with a screw, can cooperate with the support rod 24 to ensure the structural stability during the pushing process, can play a supporting role, and distribute the weight of the first counterweight component 21 to the support rod 24 and the screw 36, thereby ensuring the structural stability of each component and preventing some components from being subjected to excessive force and bending and deformation.

[0063] In the embodiment of the present invention, the cross-sectional shape of the driving hole is a rectangle or other polygonal structure, and the inner sleeve rod 35 is inserted in the driving hole. The inner sleeve rod 35 and the driving hole have abutting mating surfaces, so that when the inner sleeve rod 35 rotates, it can drive the lead screw 36 to rotate synchronously. For example, the cross-sectional dimensions of the driving hole and the inner sleeve rod 35 are both rectangular.

[0064] For example, the inner sleeve rod 35 includes a rod body with a rectangular cross-section and bosses provided at each edge of the rod body, and the cross-section of the driving hole is the same as the cross-section of the inner sleeve rod 35 .

[0065] Since the inner sleeve rod 35 can move axially in the driving hole, when the screw 36 rotates, the screw 36 cooperates with the nut 37 to push the first counterweight component 21 to move in the first direction relative to the base 11. At this time, the inner sleeve rod 35 only performs rotational motion and does not move axially.

[0066] Furthermore, the lead screws 36 in the embodiment of the present invention are two arranged side by side, each lead screw 36 is matched and connected with an inner sleeve rod 35, and a synchronous wheel 34 is provided on the inner sleeve rod 35. A driving wheel 33 is provided at the output end of the first driving part, and the driving wheel 33 and the synchronous wheel 34 are synchronously driven through a transmission member 32.

[0067] The two lead screws 36 rotate synchronously, thereby ensuring that the first counterweight component 21 moves steadily along the first direction without causing the lead screws 36 to get stuck.

[0068] In the embodiment of the present invention, two lead screws 36 and two support rods 24 are used to connect with the first counterweight component 21 and support the first counterweight component 21, which greatly improves the stability of the structure and makes the first counterweight component 21 more evenly stressed in the width direction of the base 11 (a direction perpendicular to the first direction and the vertical direction).

[0069] In some embodiments, the first driving part is a driving motor or a power push rod, and the flip driving assembly is a driving motor or a power push rod. In other words, the first counterweight component 21 can be driven to move along the first direction by arranging a driving motor, a hydraulic cylinder or other drivers on the base 11, so as to drive the first counterweight component 21 to flip. In this case, more drivers need to be arranged on the base 11 to perform different actions respectively.

[0070] like Figure 5 As shown, in order to make the extension action of the first counterweight component 21 match the deployment of the hydraulic support 100, so that they use a power source to achieve synchronous action, the first driving part of the embodiment of the present invention includes a winding wheel 31, the winding wheel 31 is supported on the base 11, and a pull rope is provided on the winding wheel 31. The movable end of the pull rope is connected to the supporting component 12, and the winding wheel 31 is connected to the driving wheel 33 by transmission. The supporting component 12 lifts to drive the winding wheel 31 to rotate in the unwinding direction through the pull rope. The winding wheel 31 has a reset component, and the reset component is used to drive the winding wheel 31 to rotate in the winding direction.

[0071] It should be understood that when the supporting component 12 of the hydraulic support 100 is unfolded, the pull rope will be pulled to drive the winding wheel 31 to rotate in the unwinding direction. At this time, since the winding wheel 31 is connected to the driving wheel 33 in transmission, for example, the winding wheel 31 and the driving wheel 33 are arranged on the same rotating shaft, the driving wheel 33 can rotate synchronously with the winding wheel 31, and the driving wheel 33 drives the synchronous wheel 34 to rotate through the transmission member 32, and then the inner sleeve rod 35 can drive the screw 36 to rotate, thereby realizing the pushing of the first counterweight component 21.

[0072] When the supporting component 12 is reset, the pull rope rotates in the winding direction under the action of the reset component, then the driving wheel 33, the synchronous wheel 34 and the inner sleeve rod 35 rotate synchronously, and the screw 36 rotates in the opposite direction, driving the first counterweight component 21 to move towards the base 11.

[0073] The reset component can be provided with a reset motor to drive the winding wheel 31 to rotate along the winding direction. The reset component can also realize the reset and winding action of the winding wheel 31 through components such as a torsion spring and a spring.

[0074] Furthermore, the transmission member 32 is a belt or a chain; that is, the driving wheel 33 and the synchronous wheel 34 perform synchronous actions through belt drive or chain drive.

[0075] Optionally, there is a deceleration component between the first driving part and the driving wheel 33, or there is a deceleration component between the driving wheel 33 and the synchronous wheel 34. In order to reasonably control the extension distance of the first counterweight component 21, the synchronous wheel 34 can be decelerated so that there is a reasonable speed ratio between the winding wheel 31 and the synchronous wheel 34.

[0076] Furthermore, the reduction ratio of the reduction component is adjustable. The reduction component is a variable gear box, or the reduction ratio can be adjusted by adjusting the diameters of the driving wheel 33 and the synchronous wheel 34. Thus, the reduction ratio can be adjusted according to actual conditions, thereby ensuring the flexibility of the center of gravity adjustment. For example, the reduction ratio can be adaptively adjusted according to the stability of the formation, the size of the formation pressure, and the size of the ground space to control the extension distance of the first counterweight component 21.

[0077] Optionally, the lead screw 36 is connected to the first counterweight component 21 via a universal joint. On the one hand, the push and pull of the lead screw 36 on the first counterweight component 21 is not affected, and on the other hand, when the first counterweight component 21 is turned over, the connection between the lead screw 36 and the first counterweight component 21 is not affected.

[0078] The first counterweight component 21 of the embodiment of the present invention includes a frame and a counterweight block, and the counterweight block is arranged on the frame to increase the weight of the frame and better adjust the center of gravity of the hydraulic support 100. When the first counterweight component 21 is in the initial state, the frame and the counterweight block are separated from the ground. After the first counterweight component 21 is turned over, the frame is supported on the ground.

[0079] like Figure 7 and Figure 8 As shown, in some embodiments, the embodiments of the present invention also include a second counterweight assembly 4, the second counterweight assembly 4 includes a second counterweight component 41 and a driving rod 42, the second counterweight component 41 is rotatably connected to the base 11, and the second counterweight component 41 and the first counterweight component 21 are arranged at the corresponding ends of the base 11 in the first direction, one end of the driving rod 42 is fixedly connected to the second counterweight component 41, and the other end of the driving rod 42 is connected to the flip driving assembly, and the flip driving assembly is used to drive the second counterweight component 41 to rotate relative to the base 11.

[0080] That is to say, the first counterweight component 21 and the second counterweight component 41 are located at both ends of the base 11 in the first direction. Since the top support component 12 mainly changes the expanded size in the first direction when it is expanded, the center of gravity will also undergo a large change in the first direction. The position of the center of gravity can be better adjusted by the first counterweight component 21 and the second counterweight component 41, so that the center of gravity can be moved downward while adjusting the position of the center of gravity in the first direction.

[0081] There can be one flipping drive assembly, that is, the first counterweight component 21 and the second counterweight component 41 share one flipping drive assembly; or, there can be two flipping drive assemblies, the first counterweight component 21 and the second counterweight component 41 are respectively connected to a flipping drive assembly, and the first counterweight component 21 and the second counterweight component 41 perform flipping actions independently.

[0082] The embodiment of the present invention shares the power source of the flipping drive assembly with the power source of the pushing drive assembly 3, that is, while the pushing drive assembly 3 pushes the first counterweight component 21, the flipping of the first counterweight component 21 and the second counterweight component 41 is achieved.

[0083] Specifically, the flipping drive assembly includes a gear 26, a first push rod 22, a second push rod 44 and a first elastic member 23. The gear 26 is fixedly connected to the first counterweight component 21. The support rod 24 and the first counterweight component 21 are connected by a first rotating shaft, and the first rotating shaft and the gear 26 are coaxially arranged; the first push rod 22 is slidably connected to the base 11, and the end of the first push rod 22 close to the first counterweight component 21 has a rack segment 25, and the rack segment 25 and the gear 26 are meshed; the second push rod 44 is slidably connected to the base 11, and the end of the second push rod 44 close to the second counterweight component 41 has a pull ring 43 extending in the vertical direction, and the driving rod 42 is arranged in the pull ring 43 and can be moved in the vertical direction in the pull ring 43; the first elastic member 23 is arranged between the first push rod 22 and the second push rod 44.

[0084] When the first counterweight component 21 is initially moving away from the base 11, since the first elastic member 23 is between the first push rod 22 and the second push rod 44, the elastic deformation of the first elastic member 23 is not enough to pull the first counterweight component 21 and the second counterweight component 41 to flip. Therefore, at this time, the first elastic member 23 continues to deform and compensates for the displacement between the first push rod 22 and the second push rod 44, and the first counterweight component 21 and the second counterweight component 41 will not flip. As the elastic deformation of the first elastic member 23 continues to increase, the force acting on the first counterweight component 21 and the second counterweight component 41 can drive the first counterweight component 21 and the second counterweight component 41 to flip. At this time, the first elastic member 23 no longer continues to deform elastically and can drive the first counterweight component 21 and / or the second counterweight component 41 to flip. The first counterweight component 21 uses the engagement of the gear 26 and the rack segment 25 to make the gear 26 rotate relative to the rack segment 25 and flip, and the second counterweight component 41 can flip under the action of the pull ring 43.

[0085] After the flipping is completed, the first counterweight component 21 abuts against the ground, and the second counterweight component 41 abuts against the side wall of the surrounding rock, so that the structural stability of the hydraulic support 100 is better.

[0086] It should also be noted that the first counterweight component 21 and the second counterweight component 41 do not necessarily flip at the same time. For example, the first counterweight component 21 can be flipped first, and then the second counterweight component 41 can be flipped as the first counterweight component 21 moves. For another example, the second counterweight component 41 can be flipped first and abut against the side wall of the surrounding rock. As the first counterweight component 21 continues to move, the elastic deformation of the first elastic member 23 is further increased, so that the rack segment 25 no longer moves and can drive the first counterweight component 21 to flip.

[0087] Optionally, the first elastic member 23 is a spring, and two ends of the spring are fixedly connected to the first stop portion 46 and the second stop portion 47 respectively.

[0088] Furthermore, the second push rod 44 includes a first rod body 441 and a second rod body 442. The first rod body 441 is coaxially arranged with the first push rod 22. The second rod body 442 is connected between the first rod body 441 and the pull ring 43. The first rod body 441 is a hollow sleeve. A sliding groove 45 is provided on the side wall of the first rod body 441. A first stop portion 46 is provided at one end of the first rod body 441 away from the second rod body 442; the first push rod 22 is sleeved in the first rod body 441, and a second stop portion 47 is provided at one end of the first rod body 441 away from the first counterweight component 21, and the second stop portion 47 is located on the outside of the first rod body 441. The connecting portion between the second stop portion 47 and the first push rod 22 is slidably arranged in the sliding groove 45, and the first elastic member 23 is arranged between the first stop portion 46 and the second stop portion 47.

[0089] The second rod body 442 can adjust the positional relationship between the first rod body 441 and the pull ring 43 to ensure that the pull ring 43 cooperates with the driving rod 42 and the first rod body 441 is coaxial with the first push rod 22 .

[0090] The first rod body 441 and the first push rod 22 are sleeved together to improve their coaxiality and ensure the structural stability of the two. When assembling the present invention, the first push rod 22 can be inserted into the first rod body 441, and the first elastic member 23 can be connected between the first stopper 46 and the second stopper 47, and then the second rod body 442 can be connected to the end of the first rod body 441.

[0091] The first stopper 46 and the second stopper 47 are annular flanges, or structures such as stop rods and bumps provided on corresponding rod bodies, and are used to limit and connect the first elastic member 23 .

[0092] In some embodiments, the top support component 12 of the hydraulic support 100 has an initial state, a first displacement state and a second displacement state. The top support component 12 is expanded from the initial state to the first displacement state, and the first counterweight component 21 moves along the first direction to move away from the base 11. The top support component 12 moves from the first displacement state to the second displacement state, and the first counterweight component 21 rotates relative to the base 11 to abut against the ground.

[0093] When the supporting member 12 is expanded from the initial state to the first displacement state, or moves from the first displacement state to the second displacement state, the second counterweight member 41 rotates relative to the base 11 and then abuts against the side wall of the surrounding rock.

[0094] It should be understood that during the operation, according to the state change of the supporting component 12, the winding wheel 31 is first driven to rotate by the pull rope to move the first counterweight component 21 away from the base 11, and then the first counterweight component 21 and the second counterweight component 41 are flipped.

[0095] like Figure 1-Figure 10 As shown, the control method of the hydraulic support 100 based on the self-adjustment of the center of gravity in the embodiment of the present invention uses the hydraulic support 100 based on the self-adjustment of the center of gravity in any of the above embodiments to perform the center of gravity adjustment control, including the following steps:

[0096] S101, the hydraulic support 100 moves to the coal seam mining area, and the top support component 12 of the hydraulic support 100 is unfolded and abuts against the surrounding rock.

[0097] S102 , until the supporting component 12 is unfolded to the first state, the first counterweight assembly 2 is synchronously extended to adjust the center of gravity of the hydraulic support 100 .

[0098] S103, continue to drive the supporting component 12 of the hydraulic support 100 to unfold to the second state, and flip the first counterweight component 21 in the first counterweight assembly 2 and the second counterweight component 41 in the second counterweight assembly 4, so that the first counterweight component 21 abuts against the ground and the second counterweight component 41 abuts against the side wall of the surrounding rock.

[0099] The following is a detailed description in conjunction with the specific structure.

[0100] like Figure 1-Figure 3As shown, an embodiment of the present invention provides a hydraulic support 100 based on self-adjustment of the center of gravity with ultra-large mining height transition, including a base 11 and a support body (i.e., the supporting component 12 mentioned above) arranged above the base 11 for supporting the coal seam. The pushing drive component arranged on the upper surface of the base 11 is connected to the support body through a steel rope. When the support body extends outward to match the coal seam, the support body extends outward to drive the pushing drive component to rotate through the steel rope, so that the pushing drive component pushes out the first counterweight component 21 arranged at the front end of the base 11 in a direction away from the base 11. By pushing out the first counterweight component 21, the forward tilting force can be balanced to a certain extent, thereby reducing the pressure and inclination at the front end of the support body and maintaining the stability of the support body.

[0101] At the same time, during the movement of the first counterweight component 21, the rack segment 25 arranged at the bottom of the first counterweight component 21 is cooperated to make the first counterweight component 21 flip clockwise. The flipped first counterweight component 21 provides support for the base 11, which helps to adjust the overall center of gravity position and improve the stability and load-bearing capacity of the bracket body.

[0102] Therefore, based on the above structure, Figure 5 The specific structure of the pushing drive component is disclosed. The pushing drive component includes a winding disk (i.e., a winding wheel 31), a belt and a driving wheel (including a driving wheel 33 and a synchronous wheel 34). The winding disk and the driving wheel are rotatably connected to a bracket fixed on the base 11, and the ends of the multiple strands of steel ropes wound on the winding disk are fixedly connected to the bracket body, and the driving wheel close to the winding disk is connected to the winding disk through a transmission shaft.

[0103] Figure 6 As shown, in the process of the bracket body expanding outward, the bracket body drives the winding disk to rotate by pulling the steel rope, and the brackets on both sides of the winding disk provide support for the winding disk and the driving wheel on the same horizontal line, so that the winding disk and the driving wheel rotate synchronously. Because the driving wheels on both sides are connected by belts, the driving wheel away from the winding disk is rotatably connected to the inner wall of the cavity opened in the base 11, and a plurality of protrusions (used for transmission with the lead screw 36, equivalent to a key) are arranged on the outside of the inner sleeve rod 35 coaxially connected to the driving wheel, and the inner sleeve rod 35 is slidably connected to the lead screw 36 sleeved on the outside in the horizontal direction, and the lead screw 36 is rotatably connected to the base 11. Therefore, when the driving wheel rotates, the inner sleeve rod 35 and the lead screw 36 rotate synchronously, so as to provide power for ejecting the first counterweight component 21 later.

[0104] The nut (i.e., the nut 37) provided at the end of the base 11 cooperates with the lead screw 36 connected to the base 11 through a thread, so that the lead screw 36 can push the first counterweight component 21 at the front end outward, thereby balancing the forward tilting force on the bracket body, thereby reducing the pressure and tilt at the front end of the bracket body and maintaining the stability of the bracket body.

[0105] It should be noted that the driving wheel is connected to the winding disk via a transmission shaft, and the driving wheel and the winding disk may also be connected via a reduction gear to prevent the lead screw 36 from extending too far, and this connection method is common knowledge and will not be elaborated here.

[0106] Furthermore, based on the above structure, Fig. 9 and Fig.10 The structure of the first counterweight component 21 is further designed, wherein the first counterweight component 21 includes a counterweight block and a bracket arranged at the bottom of the counterweight block. The counterweight block and the bracket are pushed outward to adjust the center of gravity of the bracket body to improve the overall stability.

[0107] The specific ejection process is as follows:

[0108] First of all, it is necessary to disclose that: the other end of the rack segment 25 is fixedly connected to the first top rod 22, and the middle part of the side of the bracket close to the base 11 is fixedly connected to the gear 26, the gear 26 engages with the rack segment 25 at the bottom, and the bracket is rotatably connected to the support rod 24 through the rotating shaft, and the support rod 24 is slidably connected to the base 11. The support rod 24 is used to shift the overall center of gravity to the front end after the gear 26 is flipped, and the support rod 24 can support the first counterweight component 21.

[0109] Next, when the gear 26 moves to the maximum displacement, under the action of gravity, since the ends of the first push rod 22 and the second push rod 44 are both provided with blocks (the first stop portion 46 and the second stop portion 47 respectively), the spring provided between the two blocks is sleeved on the first rod body 441, and the spring is fixedly connected to the two blocks, and the second push rod 44 is slidably connected to the first push rod 22. In this way, the block on one side of the first push rod 22 compresses the spring, the elastic potential energy of the spring increases, and the elastic force on the second push rod 44 increases. Therefore, the gear 26 and the rack segment 25 move together within a certain distance, and the first counterweight component 21 will not flip over.

[0110] When the second counterweight assembly 4 is not provided or the flipping of the second counterweight assembly 4 does not require the aid of the second top rod 44, the second top rod 44 is fixedly connected to the base 11. When the second counterweight assembly 4 is provided and the flipping of the second counterweight assembly 4 requires the aid of the second top rod 44, the second top rod 44 is connected to the second counterweight assembly 4 through a pull ring and a driving rod, and the detailed connection structure is further described below.

[0111] As the gear 26 moves outward, the gear 26, the rack segment 25 and the first push rod 22 move synchronously, and the spring is gradually compressed until the first push rod 22 no longer moves with the gear 26. At this time, the gear 26 rotates along the tooth groove on the rack segment 25, that is, the first counterweight component 21 rotates clockwise. After turning clockwise, the first counterweight component 21 contacts the ground to support the base 11. The first counterweight component 21 is against the ground, thereby preventing the extended end of the support body (that is, the supporting component) of the hydraulic support from collapsing, thereby improving the stability and bearing capacity of the support body.

[0112] When the second counterweight assembly 4 is set, when the first top rod 22 moves to the front end, it will also drive the second counterweight component 41 set at the end of the base 11 to flip, so that the second counterweight component 41 is against the end coal seam, thereby limiting the tilting of the end of the base 11.

[0113] It can be seen that the spring is used to push the second top rod 44 to move toward the front end, so that the second top rod 44 pulls the second counterweight component 41 to flip outward. By means of the second counterweight component 41 being abutted against the end coal seam, on the one hand, the weight of the end of the base 11 is increased, and on the other hand, the second counterweight component 41 is abutted against the coal seam, thereby improving the stability of the base 11.

[0114] like Figure 4 and Figure 7 As shown, the specific structure of the second counterweight assembly 4 is disclosed. The second counterweight assembly 4 includes a driving rod 42 and a second counterweight component 41 fixedly connected to the bottom of the driving rod 42. An anti-sliding block is arranged on the side of the second counterweight component 41 close to the coal seam. The second counterweight component 41 is rotatably connected to the end of the base 11. The pull ring 43 slidably connected to the driving rod 42 is fixedly connected to the second top rod 44 on the side. The first rod body 441 of the second top rod 44 is hollow. The sliding grooves on the upper and lower side walls of the first rod body 441 of the second top rod 44 are connected to the interior of the first rod body 441.

[0115] As the spring is continuously compressed, the spring exerts a gradually increasing reverse force on the second push rod 44 under the action of its elasticity. As a result, the first push rod 22 drives the pull ring 43 to move away from the second counterweight component 41, causing the drive rod 42 to slide in the pull ring 43 (the drive rod 42 drives the second counterweight component 41 to rotate at the connection between the second counterweight component 41 and the base 11), and the second counterweight component 41 flips over, and the second counterweight component 41 is against the end coal seam, thereby increasing the weight of the end of the base 11 and preventing the end of the base 11 from tilting, thereby ensuring the overall stability.

[0116] When the support body contracts, the winding disk drives the driving wheel to rotate in the opposite direction by utilizing the winding function, so that the second counterweight component 41 and the first counterweight component 21 rotate in the opposite direction, so as to realize the resetting of the device.

[0117] The steps of the control method of the hydraulic support 100 based on the self-adjustment of the center of gravity in the present invention are as follows:

[0118] When the support body expands outward, the steel rope is pulled by the support body, and the lead screw 36 is driven to rotate under the action of the push driving component, so that the lead screw 36 pushes the first counterweight component 21 out.

[0119] After the first counterweight component 21 is pushed out, the gear 26 rotates on the rack segment 25, causing the first counterweight component 21 to rotate clockwise. The first counterweight component 21 and the support rod 24 support the base 11, thereby automatically adjusting the offset center of gravity to prevent the front end of the support body from being lifted up due to the action of the coal seam.

[0120] When the first counterweight component 21 extends toward the front end, the gear 26 is used to drive the rack segment 25 to move. The force of the first push rod 22 on the spring causes the spring to elastically deform. Under the elastic action of the spring, the first push rod 22 and the second push rod 44 are pushed to move, so that the second counterweight component 41 is offset from the coal seam at the end, which increases the weight of the end of the base 11 and prevents the base 11 from tilting.

[0121] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0122] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0123] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0124] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0125] In the present invention, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0126] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A hydraulic support based on self-adjustment of the center of gravity, characterized in that: It includes a base and a top support component; Also includes: A first counterweight assembly, the first counterweight assembly comprising a first counterweight component and a support rod, the support rod being slidably disposed on the base, the first counterweight component being rotatably connected to an end of the support rod and located at one end of the base, and the first counterweight component being movable relative to the base along a first direction; A push drive assembly, the push drive assembly is arranged between the first counterweight component and the base to adjust the first counterweight component to move in a direction away from the base or in a direction close to the base; A flip driving assembly is arranged between the first counterweight component and the base, and is used to drive the first counterweight component to rotate relative to the support rod so that the first counterweight component abuts against the ground or separates from the ground.

2. The hydraulic support based on self-adjustment of the center of gravity according to claim 1, characterized in that: The push drive assembly comprises: A lead screw, a nut is fixed on the base, the lead screw is matched and meshed with the nut, one end of the lead screw is rotatably connected to the first counterweight component, and the middle of the other end of the lead screw has a driving hole; An inner sleeve rod, the inner sleeve rod is rotatably connected to the base, the inner sleeve rod is coaxially sleeved in the driving hole, the inner sleeve rod is movable along its axial direction in the driving hole, and the inner sleeve rod rotates synchronously with the lead screw; A first driving part, wherein the first driving part is used to drive the inner sleeve rod to rotate.

3. The hydraulic support based on self-adjustment of the center of gravity according to claim 2, characterized in that: There are two lead screws arranged side by side, each of which is matched and connected with the inner sleeve rod, and a synchronous wheel is arranged on the inner sleeve rod. A driving wheel is arranged at the output end of the first driving part, and the driving wheel and the synchronous wheel are synchronously driven through a transmission member.

4. The hydraulic support based on self-adjustment of the center of gravity according to claim 3, characterized in that: The first driving part is a driving motor or a power push rod; Alternatively, the flip driving component is a driving motor or a power push rod.

5. The hydraulic support based on self-adjustment of the center of gravity according to claim 4, characterized in that: The first driving part comprises a winding wheel, the winding wheel is supported on the base, a pull rope is arranged on the winding wheel upper plate, the movable end of the pull rope is connected to the top support component, and the winding wheel is connected to the driving wheel by transmission, the top support component is lifted to drive the winding wheel to rotate in the unwinding direction through the pull rope, and the winding wheel has a reset component, and the reset component is used to drive the winding wheel to rotate in the winding direction; Or, the transmission member is a belt or a chain; Or, a deceleration component is provided between the first driving part and the driving wheel, or a deceleration component is provided between the driving wheel and the synchronous wheel; Alternatively, the lead screw is connected to the first counterweight component via a universal joint.

6. The hydraulic support based on self-adjustment of the center of gravity according to claim 1, characterized in that: It also includes a second counterweight assembly, which includes a second counterweight component and a driving rod. The second counterweight component is rotatably connected to the base, and the second counterweight component and the first counterweight component are arranged at two corresponding ends of the base in the first direction. One end of the driving rod is fixedly connected to the second counterweight component, and the other end of the driving rod is connected to the flip driving assembly, and the flip driving assembly is used to drive the second counterweight component to rotate relative to the base.

7. The hydraulic support based on self-adjustment of the center of gravity according to claim 6, characterized in that: The flip drive assembly comprises: A gear, wherein the gear is fixedly connected to the first counterweight component, the support rod and the first counterweight component are connected via a first rotating shaft, and the first rotating shaft and the gear are coaxially arranged; a first push rod, the first push rod being slidably connected to the base, the first push rod having a rack section at one end close to the first counterweight component, the rack section being meshed with the gear; a second push rod, the second push rod being slidably connected to the base, the second push rod having an end close to the second counterweight component having a pull ring extending in a vertical direction, the driving rod being arranged in the pull ring and being movable in the pull ring in a vertical direction; A first elastic member is disposed between the first push rod and the second push rod.

8. The hydraulic support based on self-adjustment of the center of gravity according to claim 7, characterized in that: The second push rod comprises a first rod body and a second rod body, the first rod body is coaxially arranged with the first push rod, the second rod body is connected between the first rod body and the pull ring, the first rod body is a hollow sleeve, a sliding groove is arranged on the side wall of the first rod body, and a first stopper is arranged at one end of the first rod body away from the second rod body; the first push rod is sleeved in the first rod body, and a second stopper is arranged at one end of the first rod body away from the first counterweight component, and the second stopper is located at the outer side of the first rod body, and a connecting part between the second stopper and the first push rod is slidably arranged in the sliding groove, and the first elastic member is arranged between the first stopper and the second stopper; Alternatively, the first elastic member is a spring, and two ends of the spring are fixedly connected to the first stop portion and the second stop portion respectively.

9. The hydraulic support based on self-adjustment of the center of gravity according to claim 8, characterized in that: The supporting component of the hydraulic support has an initial state, a first displacement state, and a second displacement state. The supporting component is deployed from the initial state to the first displacement state, and the first counterweight component moves along a first direction to move away from the base. The supporting component moves from the first displacement state to the second displacement state, and the first counterweight component rotates relative to the base to abut against the ground. When the supporting component is expanded from the initial state to the first displacement state, or moves from the first displacement state to the second displacement state, the second counterweight component rotates relative to the base to abut against the side wall of the surrounding rock.

10. A hydraulic support control method based on self-adjustment of center of gravity, characterized in that: Using the hydraulic support based on self-adjustment of the center of gravity as described in any one of claims 1 to 9 to perform center of gravity adjustment control, comprising the following steps The hydraulic support moves to the coal seam mining area, and the top support components of the hydraulic support are unfolded and contact with the surrounding rock; Until the supporting member is unfolded to the first state, the first counterweight assembly is synchronously extended to adjust the center of gravity of the hydraulic support; Continue to drive the top support component of the hydraulic support to expand to the second state, and flip the first counterweight component in the first counterweight assembly and the second counterweight component in the second counterweight assembly, so that the first counterweight component abuts against the ground and the second counterweight component abuts against the side wall of the surrounding rock.

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