Hydraulic stone clamp

Abstract

The present invention discloses a hydraulic stone clamp, and relates to the technical field of stone clamping equipment for mining. The present invention comprises a frame, a clamping hydraulic cylinder is fixedly installed on the inner top of the frame, an upper connecting block is fixedly installed on the bottom of the telescopic end of the clamping hydraulic cylinder, a clamping claw is hinged on the bottom of the frame, an upper pull rod is hinged on the outer surface of the clamping claw, a lower pull rod is hinged on the inner surface of the clamping claw, the upper pull rod is hinged with the upper connecting block, a locking assembly is fixedly installed inside the frame, a lower connecting block is threadedly connected to the bottom of the locking assembly, and the lower pull rod is hinged with the lower connecting block. After clamping once, the locking assembly of the present invention locks itself and applies downward pressure to the lower connecting block, providing locking and providing secondary clamping force at the same time, ensuring high clamping stability, and then through the structural setting of the locking assembly, when the hydraulic system of the device fails, the position of the lower connecting block will not change, which can greatly improve the transportation safety of the device.

Description

Technical Field

[0001] The invention relates to the technical field of mining stone clamping equipment, in particular to a hydraulic stone clamp. Background Art

[0002] With the increasing demand for mining of mineral resources, mining production is facing more complex challenges, especially in the process of ore handling, processing and processing. How to efficiently and safely clamp and transport stones has become a crucial link in mining operations. In the mining process, the handling of stones is a very important and arduous work link. Due to the large size, heavy weight and irregular shape of ore, stone clamps are required for handling.

[0003] The patent with the authorization announcement number CN221628144U discloses a hydraulic stone clamp, including: a mounting device, the bottom of which is connected to an angle adjustment device capable of adjusting the angle; a hydraulic clamping device is installed at the bottom of the angle adjustment device, and the hydraulic clamping device includes: an ear shaft frame, the ear shaft frame is installed at the bottom of the angle adjustment device, and is arranged in parallel and symmetrically; a clamping member, the clamping member is rotatably arranged between adjacent ear shaft frames, and the clamping members are arranged in parallel; a hydraulic cylinder, one end of the hydraulic cylinder is connected to the angle adjustment device, the other end of the hydraulic cylinder is connected to the clamping member, and the hydraulic cylinder is used to provide power for the operation of the clamping member. This patent adopts a traditional hydraulic clamping device, which can only apply clamping force once during the clamping process, and the clamping stability is poor; at the same time, when the hydraulic system fails, the clamping device will also fail, which is easy to cause safety accidents during the handling process, does not have a failure protection function, and has poor safety in use. Summary of the invention

[0004] The purpose of the present invention is to solve the above problems and provide a hydraulic stone clamp.

[0005] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0006] The hydraulic stone clamp comprises a frame, a clamping hydraulic cylinder is fixedly installed on the inner top of the frame, an upper connecting block is fixedly installed on the bottom of the telescopic end of the clamping hydraulic cylinder, a clamping claw is hinged on the bottom of the frame, an upper pull rod is hinged on the outer surface of the clamping claw, a lower pull rod is hinged on the inner surface of the clamping claw, and the upper pull rod is hinged to the upper connecting block;

[0007] A locking assembly is fixedly installed inside the frame, a lower connecting block is threadedly connected to the bottom of the locking assembly, and the lower pull rod is hinged to the lower connecting block.

[0008] Further, the locking assembly includes a bracket plate fixedly installed inside the frame, a guide hole is formed inside the bracket plate, a threaded mounting groove is formed on the top of the bracket plate, a sliding window is formed between the threaded mounting groove and the guide hole, a locking nut sleeve is threadedly connected to the inside of the threaded mounting groove, an inner conical cavity is formed inside the locking nut sleeve, an upper transmission gear is provided on the top of the locking nut sleeve, an inner guide strip is provided on the inner wall of the upper transmission gear, an outer sliding block is slidably connected to the inside of the sliding window, a locking rod is inserted into the inside of the guide hole, the lower connecting block is threadedly connected to the bottom end of the locking rod, an outer guide groove is formed on the outer side of the locking rod, and the inner guide strip is slidably connected in the outer guide groove;

[0009] A sliding groove is provided on the side of the outer slider close to the locking rod, and the inner slider is slidably connected to the inside of the sliding groove. The inner slider can slide along the sliding groove, and a clamping block is fixedly installed on the side of the inner slider close to the locking rod. A locking hydraulic cylinder is fixedly installed inside the frame, and a driving gear rod is fixedly installed on the telescopic end of the locking hydraulic cylinder. The driving gear rod is meshed with the upper transmission gear. The height of the upper transmission gear is greater than the height of the driving gear rod. The clamping hydraulic cylinder is a single-acting hydraulic cylinder, and the locking hydraulic cylinder is a double-acting hydraulic cylinder.

[0010] Furthermore, the sliding windows and the outer sliding blocks are provided in multiple groups, and the multiple groups of sliding windows and the outer sliding blocks are distributed in a ring shape.

[0011] Furthermore, the clamping block is designed to be arc-shaped, and the radius of the arc is the same as the radius of the locking rod, and a surface of the clamping block close to the locking rod is a frosted surface.

[0012] Furthermore, a hydraulic cavity is provided inside the locking rod, the hydraulic cavity is connected to the hydraulic system, a hydraulic telescopic rod is sealingly and slidably connected inside the hydraulic cavity, and a tension spring is provided between the hydraulic telescopic rod and the inner wall of the hydraulic cavity.

[0013] Furthermore, a connecting piece is provided on the top of the frame.

[0014] Furthermore, a cross brace is provided inside the frame, a through hole is opened inside the cross brace, and the locking rod can pass through the through hole.

[0015] Furthermore, the clamping jaws are composed of two groups of arc-shaped jaws.

[0016] Furthermore, two groups of upper pull rods and lower pull rods are provided on the clamping jaws.

[0017] The beneficial effects of the present invention are as follows:

[0018] 1. The present invention drives the upper connecting block to descend by the clamping hydraulic cylinder, and the upper connecting block drives the two groups of clamping claws to close together through the upper pull rod to clamp the stone once, and at the same time, the lower pull rod drives the lower connecting block to descend, and the lower connecting block drives the locking assembly to descend. After one clamping, the locking assembly locks itself and applies downward pressure to the lower connecting block, providing locking and providing secondary clamping force at the same time, ensuring high clamping stability. Furthermore, through the structural setting of the locking assembly, when the hydraulic system of the device fails, the position of the lower connecting block will not change, which can greatly improve the transportation safety of the device.

[0019] 2. The present invention combines secondary clamping with locking, the device has a simple structure and reliable operation, and the two clamping forces are applied to the clamping claws, which adopts a superposition effect and has a better clamping effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is an exploded view of the present invention;

[0022] Figure 3 It is a schematic diagram of the structure of the clamping jaw of the present invention;

[0023] Figure 4 is a schematic cross-sectional view of the locking assembly of the present invention;

[0024] Figure 5 is an exploded view of the locking assembly of the present invention;

[0025] Figure 6 It is a schematic diagram of the structure of the bracket plate of the present invention;

[0026] Figure 7 It is a schematic diagram of the cross-sectional structure of the locking nut sleeve of the present invention;

[0027] Figure 8 It is a schematic diagram of the cross-sectional structure of the outer slider of the present invention.

[0028] : 1. frame; 11. connecting piece; 12. cross brace; 2. clamping hydraulic cylinder; 21. upper connecting block; 3. locking hydraulic cylinder; 31. driving gear rod; 4. clamping claw; 41. upper pull rod; 42. lower pull rod; 5. bracket plate; 51. guide hole; 52. threaded mounting groove; 53. sliding window; 6. lower connecting block; 7. locking rod; 71. outer guide groove; 72. hydraulic telescopic rod; 73. tension spring; 8. locking nut sleeve; 81. inner conical cavity; 82. upper transmission gear; 83. inner guide strip; 9. outer slider; 91. inner slider; 92. clamping block. DETAILED DESCRIPTION

[0029] To make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0030] Embodiment 1, as Figure 1-Figure 8 As shown, the hydraulic stone clamp comprises a frame 1, a clamping hydraulic cylinder 2 is fixedly installed on the inner top of the frame 1, an upper connecting block 21 is fixedly installed on the bottom of the telescopic end of the clamping hydraulic cylinder 2, a clamping jaw 4 is hinged on the bottom of the frame 1, an upper pull rod 41 is hinged on the outer surface of the clamping jaw 4, a lower pull rod 42 is hinged on the inner surface of the clamping jaw 4, and the upper pull rod 41 is hinged to the upper connecting block 21;

[0031] A locking assembly is fixedly installed inside the frame 1 , a lower connecting block 6 is threadedly connected to the bottom of the locking assembly, and a lower pull rod 42 is hinged to the lower connecting block 6 .

[0032] When in use, the clamping hydraulic cylinder 2 runs, and the clamping hydraulic cylinder 2 drives the upper connecting block 21 to descend. The upper connecting block 21 drives the two groups of jaws 4 to close together through the upper pull rod 41, and clamps the stone once. While the two groups of jaws 4 are close together, the lower connecting block 6 is driven to descend through the lower pull rod 42, and the lower connecting block 6 drives the locking assembly to descend. After one clamping, the locking assembly will lock itself and apply downward pressure to the lower connecting block 6, providing locking force while providing secondary clamping force to ensure high clamping stability. Through the locking assembly structure setting, when the hydraulic system of the device fails, the position of the lower connecting block 6 will not change. The lower connecting block 6 limits the expansion of the jaws 4 through the lower pull rod 42, which can greatly improve the transportation safety of the device.

[0033] Embodiment 2, on the basis of the above embodiment, further includes: the locking assembly includes a bracket plate 5 fixedly installed inside the frame 1, a guide hole 51 is opened through the inside of the bracket plate 5, a threaded mounting groove 52 is opened on the top of the bracket plate 5, a sliding window 53 is opened between the threaded mounting groove 52 and the guide hole 51, a locking nut sleeve 8 is threadedly connected to the inside of the threaded mounting groove 52, an inner conical cavity 81 is opened inside the locking nut sleeve 8, an upper transmission gear 82 is arranged on the top of the locking nut sleeve 8, an inner guide strip 83 is arranged on the inner wall of the upper transmission gear 82, an outer slider 9 is slidably connected to the inside of the sliding window 53, a locking rod 7 is inserted into the inside of the guide hole 51, a lower connecting block 6 is threadedly connected to the bottom end of the locking rod 7, an outer guide groove 71 is opened on the outer side of the locking rod 7, and the inner guide strip 83 is slidably connected in the outer guide groove 71;

[0034] A sliding groove is provided on the side of the outer slider 9 close to the locking rod 7, and an inner slider 91 is slidably connected inside the sliding groove. The inner slider 91 can slide along the sliding groove, and a clamping block 92 is fixedly installed on the side of the inner slider 91 close to the locking rod 7. A locking hydraulic cylinder 3 is fixedly installed inside the frame 1, and a driving gear rod 31 is fixedly installed on the telescopic end of the locking hydraulic cylinder 3. The driving gear rod 31 is meshed with the upper transmission gear 82. The height of the upper transmission gear 82 is greater than the height of the driving gear rod 31, so that when the locking nut sleeve 8 is rotated upward, the driving gear rod 31 can always be meshed with the upper transmission gear 82. The clamping hydraulic cylinder 2 is a single-acting hydraulic cylinder, and the locking hydraulic cylinder 3 is a double-acting hydraulic cylinder.

[0035] When in use, the clamping hydraulic cylinder 2 is in operation, the clamping hydraulic cylinder 2 drives the upper connecting block 21 to descend, the upper connecting block 21 drives the two sets of clamping jaws 4 to close together through the upper pull rod 41, and the stone is clamped once. While the two sets of clamping jaws 4 are close together, the lower connecting block 6 is driven to descend through the lower pull rod 42, and the lower connecting block 6 drives the locking rod 7 to descend, and the locking rod 7 moves downward relative to the upper transmission gear 82. When one clamping is completed, the locking hydraulic cylinder 3 is controlled to operate, and the locking hydraulic cylinder 3 drives the driving gear rod 31 to move, and the driving gear rod 31 drives The upper transmission gear 82 is driven to rotate, and the upper transmission gear 82 drives the locking nut sleeve 8 to rotate upward. The locking nut sleeve 8 pushes the outer slider 9 to slide into the guide hole 51 through the inner tapered cavity 81. The outer slider 9 drives the clamping block 92 to press tightly on the locking rod 7. The clamping block 92 clamps the locking rod 7. Since the clamping block 92 can slide relative to the outer slider 9, the locking rod 7 cannot move up and down, but can rotate around a certain angle. At the same time, the plane position of the bottom end of the inner tapered cavity 81 contacts the outer slider 9, so as the locking hydraulic cylinder 3 continues to move The locking hydraulic cylinder 3 drives the driving gear rod 31 to move, and the driving gear rod 31 drives the upper transmission gear 82 to continue to rotate, and the upper transmission gear 82 drives the locking nut sleeve 8 to continue to rotate upward, and the position of the outer slide block 9 remains unchanged. At this time, the upper transmission gear 82 drives the locking rod 7 to rotate a certain angle through the inner guide bar 83 and the outer guide groove 71. At this time, the locking rod 7 cannot move up and down, so it will give the lower connecting block 6 a downward thrust, and the lower connecting block 6 gives the clamping claw 4 a secondary clamping force through the lower pull rod 42 to ensure high clamping stability. It should be noted that the clamping hydraulic cylinder 2 in the present invention is a single-acting hydraulic cylinder. The hydraulic oil of the single-acting hydraulic cylinder is injected into one end of the hydraulic cylinder through the hydraulic system, acting on the other side of the piston, pushing the piston rod outward, thereby generating thrust. When the hydraulic oil is discharged, the piston rod generates a reaction force through the internal spring (usually located at one end of the hydraulic cylinder), pushing the piston rod back to the original position to inject hydraulic oil. Since the hydraulic driving force of the clamping hydraulic cylinder 2 is downward, the secondary clamping force can be stably applied to the clamping claw 4.

[0036] Since the locking nut sleeve 8 is threadedly connected in the threaded mounting groove 52, during the transportation process, even if the hydraulic pressure in the clamping hydraulic cylinder 2 and the locking hydraulic cylinder 3 fails, the locking rod 7 is still locked in the guide hole 51, and the position of the lower connecting block 6 will not change. The lower pull rod 42 can limit the expansion of the clamping jaws 4, and the use safety is high. It should be noted that the locking hydraulic cylinder 3 is a double-acting hydraulic cylinder. When the hydraulic oil is injected into one side of the hydraulic cylinder (usually one side of the piston), the oil pressure pushes the piston rod outward to generate thrust. When the hydraulic oil is injected into the other side of the hydraulic cylinder (usually the side where the piston rod is located), the oil pressure pushes the piston rod back into the cylinder body to generate a pulling force. Therefore, when the hydraulic system fails, the driving gear rod 31 cannot automatically extend and retract, the locking nut sleeve 8 will not rotate downward, and the locking is stable.

[0037] It is also possible to rotatably install multiple groups of vertically distributed cylindrical rollers on the outer slider 9, and to limit the up and down movement of the locking rod 7, but not limit the rotation of the locking rod 7. Although this method increases the rotation angle, the clamping force is lacking, and the displacement distance of the secondary clamping is itself small, so a smaller rotation angle can be achieved.

[0038] Embodiment 3, based on the above embodiments, further includes that the sliding windows 53 and the outer sliding block 9 are provided with multiple groups, and the multiple groups of sliding windows 53 and the outer sliding block 9 are distributed in a ring shape. Through this design, a more stable clamping force can be provided.

[0039] Embodiment 4, based on the above embodiments, further includes: the clamp block 92 is designed to be arc-shaped, and the radius of the arc is the same as the radius of the locking rod 7, and the side of the clamp block 92 close to the locking rod 7 is a frosted surface, the contact area between the clamp block 92 and the locking rod 7 is larger, and the clamping is more stable.

[0040] Embodiment 5, on the basis of the above embodiment, further includes: a hydraulic cavity is opened inside the locking rod 7, the hydraulic cavity is connected to the hydraulic system, the hydraulic cavity is sealed and slidably connected with a hydraulic telescopic rod 72, and a tension spring 73 is arranged between the hydraulic telescopic rod 72 and the inner wall of the hydraulic cavity. Through this design, after the secondary clamping, hydraulic oil is injected into the hydraulic cavity, and the hydraulic oil pushes the hydraulic telescopic rod 72 to extend downward. The hydraulic telescopic rod 72 presses on the top of the stone, further improving the clamping stability. Moreover, because the locking rod 7 itself will drop when the clamping jaws 4 are closed, the telescopic distance of the hydraulic structure is shorter and the structure is more compact.

[0041] Embodiment 6, based on the above embodiment, further includes that a connecting piece 11 is provided on the top of the frame 1 to facilitate connection to external equipment.

[0042] Furthermore, a cross brace 12 is provided inside the frame 1 , and a through hole is provided inside the cross brace 12 , through which the locking rod 7 can pass. By providing the cross brace 12 , the structural stability of the frame 1 can be improved.

[0043] Embodiment 7, based on the above embodiment, further includes that the clamping jaws 4 are composed of two groups of arc-shaped jaws.

[0044] Furthermore, two groups of upper pull rods 41 and lower pull rods 42 are provided on the clamping jaws 4, so that the clamping is more stable.

[0045] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A hydraulic stone clamp, comprising a frame (1), characterized in that: A clamping hydraulic cylinder (2) is fixedly mounted on the inner top of the frame (1), an upper connecting block (21) is fixedly mounted on the bottom of the telescopic end of the clamping hydraulic cylinder (2), a clamping claw (4) is hingedly mounted on the bottom of the frame (1), an upper pull rod (41) is hingedly mounted on the outer surface of the clamping claw (4), a lower pull rod (42) is hingedly mounted on the inner surface of the clamping claw (4), and the upper pull rod (41) is hingedly mounted on the upper connecting block (21); A locking assembly is fixedly installed inside the frame (1), a lower connecting block (6) is threadedly connected to the bottom of the locking assembly, and the lower pull rod (42) is hingedly connected to the lower connecting block (6); The locking assembly comprises a support plate (5) fixedly mounted inside the frame (1); a guide hole (51) is formed inside the support plate (5); a threaded mounting groove (52) is formed on the top of the support plate (5); a sliding window (53) is formed between the threaded mounting groove (52) and the guide hole (51); a locking nut sleeve (8) is threadedly connected to the inside of the threaded mounting groove (52); an inner conical cavity (81) is formed inside the locking nut sleeve (8); an upper transmission gear (82) is provided on the top of the locking nut sleeve (8); an inner guide strip (83) is provided on the inner wall of the upper transmission gear (82); an outer sliding block (9) is slidably connected to the inside of the sliding window (53); a locking rod (7) is inserted into the inside of the guide hole (51); and the lower connecting block (6) is threadedly connected to the locking nut sleeve (8). The bottom end of the rod (7) is provided with an outer guide groove (71) on the outer side of the locking rod (7), and the inner guide strip (83) is slidably connected in the outer guide groove (71). The outer slider (9) is provided with a slide groove on the side close to the locking rod (7), and the inner slider (91) is slidably connected inside the slide groove. The inner slider (91) can slide along the slide groove. A clamping block (92) is fixedly installed on the side close to the locking rod (7) of the inner slider (91). A locking hydraulic cylinder (3) is fixedly installed inside the frame (1), and a driving gear rod (31) is fixedly installed at the telescopic end of the locking hydraulic cylinder (3). The driving gear rod (31) is meshed with an upper transmission gear (82), and the height of the upper transmission gear (82) is greater than the height of the driving gear rod (31). The clamping hydraulic cylinder (2) is a single-acting hydraulic cylinder, and the locking hydraulic cylinder (3) is a double-acting hydraulic cylinder.

2. The hydraulic stone clamp according to claim 1, characterized in that: The sliding windows (53) and the outer sliding blocks (9) are both provided in multiple groups, and the multiple groups of sliding windows (53) and the outer sliding blocks (9) are distributed in a ring shape.

3. The hydraulic stone clamp according to claim 2, characterized in that: The clamping block (92) is designed to be arc-shaped, and the radius of the arc is the same as the radius of the locking rod (7); and a surface of the clamping block (92) close to the locking rod (7) is a frosted surface.

4. The hydraulic stone clamp according to claim 3, characterized in that: The locking rod (7) has a hydraulic cavity inside, the hydraulic cavity is connected to the hydraulic system, a hydraulic telescopic rod (72) is sealingly and slidably connected inside the hydraulic cavity, and a tension spring (73) is provided between the hydraulic telescopic rod (72) and the inner wall of the hydraulic cavity.

5. The hydraulic stone clamp according to claim 4, characterized in that: A connecting piece (11) is provided on the top of the frame (1).

6. The hydraulic stone clamp according to claim 5, characterized in that: A cross brace (12) is provided inside the frame (1), and a through hole is provided inside the cross brace (12), through which the locking rod (7) can pass.

7. The hydraulic stone clamp according to claim 1, characterized in that: The clamping jaws (4) are composed of two groups of arc-shaped jaws.

8. The hydraulic stone clamp according to claim 7, characterized in that: Two sets of upper pull rods (41) and lower pull rods (42) are provided on the clamping jaws (4).

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