Normally closed type self-falling clamp holder

Abstract

The clamping frame and the side plate are symmetrically connected to the upper portion of the base plate, a penetrating opening is formed in the middle of the base plate, the two ends of the base plate and the same side of the clamping frame are fixedly connected with clamping driving pieces, and a linkage lock is hinged to the top end of the clamping frame. Self-falling clamping blocks which slide in the inclined direction are further arranged in the clamping frame, the distance between the self-falling clamping blocks on the two sides is increased along with increase of the displacement height, and the telescopic end of the clamping driving piece and the upper ends of the self-falling clamping blocks are movably connected with the two ends of the linkage lock respectively. Compared with the prior art, the normally-closed type self-falling clamp holder has the advantages that the clamp holder is convenient to operate and use, reduces oil pressure supply, is easy to disassemble, assemble and use, and can perform normally-closed type self-falling clamping.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel drilling machines, in particular to a normally closed self-falling clamp. Background Art

[0002] Tunnel drilling rig is a kind of equipment specially used for drilling in underground tunnels of mines in geological exploration and drilling projects. It has the characteristics of good disassembly and light parts, and the drilling direction can be flexibly adjusted within the range of 0° to 360°.

[0003] Tunnel drilling rigs are mainly used in deep geological exploration, gas extraction, drainage, ventilation and other projects. They have various driving modes, including pneumatic, hydraulic and electric. The main components include power machine (group), rotator, drilling tool pulling mechanism and drilling tool unscrewing device. They are usually fixed on a single-leg or double-leg column. Tunnel drilling rigs play an important role in underground projects such as coal mines with their high efficiency and flexibility.

[0004] During the use of the tunnel drilling rig, the drill rod needs to be fixed. In the prior art, a double-cylinder clamp is often used to fix the drill rod, and each cylinder is equipped with a disc spring to clamp and loosen the drill rod.

[0005] like Figures 1-2 As shown, in the prior art, when the cylinder is flushing oil, the piston rod drives the clamping shoe to move to the left. At this time, the disc spring is in a compressed state, the diameter is maximum, and the drill rod is loosened. When the cylinder is unloading oil, the disc spring rebounds and drives the piston rod to move to the right. At this time, the diameter is minimum and the drill rod is clamped.

[0006] This results in a relatively complex structure, a long production cycle, a delayed response speed when clamping the drill rod, and the need for greater oil pressure to clamp the drill rod. Summary of the invention

[0007] The technical problem to be solved by the present invention is to overcome the above technical defects and provide a normally closed self-falling clamp which is easy to operate and use, reduces oil pressure supply, is easy to disassemble and use, and can perform normally closed self-falling clamping.

[0008] In order to solve the above technical problems, the technical solution provided by the present invention is: a normally closed self-falling clamp, including a base plate and a clamping frame and a side plate symmetrically connected to the upper part of the base plate, a through opening is provided in the middle of the base plate, and the two ends of the base plate are fixedly connected to the same side of the clamping frame and are provided with a clamping drive member, a linkage lock is hinged at the top of the clamping frame, and an obliquely sliding self-falling clamping block is also provided in the clamping frame, and the spacing between the self-falling clamping blocks on both sides increases with the increase of the displacement height, and the telescopic end of the clamping drive member and the upper end of the self-falling clamping block are respectively movably connected to the two ends of the linkage lock.

[0009] Preferably, the clamping drive member includes an outer tube and an inner sleeve, the top of the outer tube is connected to a sealing plug head, the inner sleeve is slidably sleeved with the sealing plug head, the bottom end of the inner sleeve is located inside the outer tube and is connected to a piston head, a reset support spring is connected between the piston head and the inner bottom wall of the outer tube, and an oil filling port is provided on the outer tube at the upper part of the piston head.

[0010] Preferably, both ends of the base plate are connected with arc-shaped locking rings, the arc-shaped locking rings and the base plate are fixed by bolts, and the ends of the base plate are also concave with arc grooves in the arc-shaped locking rings.

[0011] Preferably, the top threaded connection of the inner sleeve is provided with a connecting shaft, the top of the self-falling clamp is provided with a flange, the top of the clamping frame is connected with a hinged plate in cooperation with a linkage lock, axial holes are opened on the hinged plate, the flange and the connecting shaft, and positioning bolts are connected in the axial holes, sliding grooves are provided at both ends of the linkage lock in cooperation with the positioning bolts, and an axial hole is also provided in the middle of the linkage lock in cooperation with the positioning bolt.

[0012] Preferably, the inner wall of the clamping frame is an inclined wall, a slideway is concavely provided on the inclined wall, and the self-falling clamping block is slidably arranged in the slideway.

[0013] Preferably, a plurality of bolt positioning holes that cooperate with each other are provided between adjacent surfaces of the base plate, the clamping frame and the side plates.

[0014] Preferably, the interlocking lock comprises two groups of connecting plates with the same structure, the two groups of connecting plates are respectively installed on both sides of the hinged plate, the sliding groove openings are opened at the ends of the connecting plates, and the shaft hole is opened in the middle of the connecting plates.

[0015] The advantages of the present invention compared with the prior art are: in the present invention, the movement direction of the self-falling clamp is changed, and the oblique setting facilitates self-falling clamping. At the same time, the clamping drive member of the present invention is additionally provided with a reset support spring to ensure normal self-closing use, reduce the use of oil pressure, simplify daily maintenance, and is convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the prior art.

[0017] Figure 2 It is a structural schematic diagram when the prior art is used.

[0018] Figure 3 It is a structural schematic diagram of a normally closed self-falling gripper.

[0019] Figure 4 It is a structural schematic diagram of a cross-section of a normally closed self-falling gripper.

[0020] Figure 5 It is a structural schematic diagram of the normally closed self-falling clamp in the relaxed state.

[0021] Figure 6 It is a structural schematic diagram of the clamping state of the normally closed self-falling clamp.

[0022] Figure 7 It is a structural schematic diagram of the exploded view of the normally closed self-falling gripper.

[0023] As shown in the figure: 1. Base plate, 2. Clamping frame, 3. Side plate, 4. Through-hole, 5. Interlocking lock, 6. Self-falling clamping block, 7. Inner sleeve, 8. Sealing bolt head, 9. Piston head, 10. Reset support spring, 11. Arc-shaped locking ring, 12. Connecting shaft, 13. Hinge plate, 14. Flange, 15. Slide groove, 16. Slideway, 17. Connecting plate, 18. Oil filling port. DETAILED DESCRIPTION

[0024] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0025] Combined with Figure 3-7 As shown, the normally closed self-falling clamp comprises a base plate 1 and a clamping frame 2 and a side plate 3 symmetrically connected to the upper part of the base plate 1. A through hole 4 is provided in the middle of the base plate 1, and a drill rod member is arranged through the through hole 4.

[0026] The two ends of the base plate 1 are fixedly connected to the same side of the clamping frame 2 with a clamping drive member, a linkage lock 5 is hinged on the top of the clamping frame 2, and a self-falling clamp block 6 that slides obliquely is provided in the clamping frame 2. The spacing between the self-falling clamp blocks 6 on both sides increases with the increase of the displacement height, so that it is easy to realize the self-falling clamping. More specifically, the inner wall of the clamping frame 2 is an inclined wall, and a slideway 16 is concavely provided on the inclined wall. The self-falling clamp block 6 is slidably arranged in the slideway 16, and the telescopic end of the clamping drive member and the upper end of the self-falling clamp block 6 are respectively movably connected to the two ends of the linkage lock 5.

[0027] When in use, in order to ensure normally closed clamping and reduce the use of oil pressure, the clamping drive member includes an outer tube 7 and an inner sleeve 7. The top of the outer tube 7 is connected to a sealing plug head 8, and the inner sleeve 7 is slidably sleeved with the sealing plug head 8. The bottom end of the inner sleeve 7 is located in the outer tube 7 and is connected to a piston head 9. A reset support spring 10 is connected between the piston head 9 and the inner bottom wall of the outer tube 7. An oil filling port 18 is provided on the outer tube 7 at the upper part of the piston head 9. The oil filling port 18 is connected to an external oil pipe. A slight supply of oil can control the displacement of the inner sleeve 7 to complete the movement of the self-falling clamp 6. In order to facilitate the installation of the clamping drive member, arc-shaped locking rings 11 are connected at both ends of the base plate 1. The arc-shaped locking ring 11 is fixed to the base plate 1 by bolts. The end of the base plate 1 is also equipped with an arc groove concave in the arc-shaped locking ring 11. The installation and use are completed by the setting of the arc groove.

[0028] When realizing the linkage use of the clamping drive and the self-falling clamp, the top threaded connection of the inner sleeve 7 is provided with a connecting shaft 12, the top of the self-falling clamp 6 is provided with a flange 14, and the top of the clamping frame 2 is connected with a hinged plate 13 in cooperation with the linkage lock 5. Axial holes are provided on the hinged plate 13, the flange 14 and the connecting shaft 12, and positioning bolts are connected in the axis holes. The two ends of the linkage lock 5 are provided with sliding grooves 15 in cooperation with the positioning bolts, and the middle part of the linkage lock 5 is also provided with an axial hole in cooperation with the positioning bolt. When the inner sleeve 7 is raised or lowered, the flange 14 is driven by the linkage lock to control the movement of the self-falling clamp 6, thereby completing the relaxation or clamping use.

[0029] When the installation and use of the clamping drive and the self-falling clamp 6 are completed, the interlocking lock 5 includes two groups of connecting plates 17 with the same structure. The two groups of connecting plates 17 are respectively installed on both sides of the hinged plate 13, the sliding groove mouth 15 is opened at the end of the connecting plate 17, and the axial hole is opened in the middle of the connecting plate 17, so as to facilitate the installation and use of the interlocking lock 5.

[0030] In the present invention, a plurality of bolt positioning holes are provided between the adjacent surfaces of the base plate 1, the clamping frame 2 and the side plate 3, which are arranged in cooperation with each other, so that each component can be disassembled, which is convenient for subsequent maintenance and use.

[0031] Working principle: When the cylinder is charged with oil, the piston rod moves downward and the spring is in a compressed state. When the cylinder is unloaded with oil, the spring rebounds and drives the piston rod to move upward.

[0032] The piston rod moves downward to drive the linkage lock to drive the self-falling clamp to move upward. At this time, the opening of the self-falling clamp is the largest, and the drill rod is released;

[0033] When the oil cylinder is unloading oil, the cylinder spring pushes the piston rod upward to drive the linkage lock to drive the self-falling clamp to move downward. At this time, the opening of the self-falling clamp is the smallest diameter, locking the drill rod.

[0034] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0035] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. Normally closed self-falling gripper, characterized by: The invention comprises a base plate (1) and a clamping frame (2) and a side plate (3) symmetrically connected to the upper part of the base plate (1); a through opening (4) is provided in the middle of the base plate (1); two ends of the base plate (1) are fixedly connected to the same side of the clamping frame (2) and are provided with a clamping drive member; a linkage lock (5) is hingedly connected to the top of the clamping frame (2); a self-falling clamping block (6) which slides obliquely is also provided in the clamping frame (2); the spacing between the self-falling clamping blocks (6) on both sides increases with the increase of the displacement height; the telescopic end of the clamping drive member and the upper end of the self-falling clamping block (6) are respectively movably connected to the two ends of the linkage lock (5).

2. The normally closed self-falling clamp according to claim 1, characterized in that: The clamping drive member comprises an outer tube (7) and an inner sleeve (7); the top of the outer tube (7) is connected to a sealing plug head (8); the inner sleeve (7) and the sealing plug head (8) are slidably sleeved; the bottom end of the inner sleeve (7) is located inside the outer tube (7) and is connected to a piston head (9); a return support spring (10) is connected between the piston head (9) and the inner bottom wall of the outer tube (7); and an oil filling port (18) is provided on the outer tube (7) at the upper part of the piston head (9).

3. The normally closed self-falling clamp according to claim 2, characterized in that: The two ends of the base plate (1) are connected with arc-shaped locking rings (11), the arc-shaped locking rings (11) and the base plate (1) are fixed by bolts, and the ends of the base plate (1) are also concave with arc grooves to match the arc-shaped locking rings (11).

4. The normally closed self-falling clamp according to claim 2, characterized in that: The top of the inner sleeve (7) is threadedly connected with a connecting shaft (12), the top of the self-falling clamping block (6) is provided with a flange (14), the top of the clamping frame (2) is connected with a hinge plate (13) in cooperation with the linkage lock (5), the hinge plate (13), the flange (14) and the connecting shaft (12) are all provided with axial holes, and positioning bolts are connected in the axial holes, the two ends of the linkage lock (5) are provided with sliding grooves (15) in cooperation with the positioning bolts, and the middle of the linkage lock (5) is also provided with an axial hole in cooperation with the positioning bolts.

5. The normally closed self-falling clamp according to claim 4, characterized in that: The inner wall of the clamping frame (2) is arranged as an inclined wall, a slideway (16) is arranged in a recessed manner on the inclined wall, and the self-falling clamping block (6) is slidably arranged in the slideway (16).

6. The normally closed self-falling clamp according to claim 1, characterized in that: A plurality of bolt positioning holes which cooperate with each other are provided between adjacent surfaces of the base plate (1), the clamping frame (2) and the side plate (3).

7. The normally closed self-falling clamp according to claim 4, characterized in that: The linkage lock (5) comprises two groups of connecting plates (17) of the same structure, the two groups of connecting plates (17) are respectively installed on both sides of the hinge plate (13), the sliding groove opening (15) is opened at the end of the connecting plate (17), and the shaft hole is opened in the middle of the connecting plate (17).

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