A high-efficiency rock breaking and cutting device

Abstract

The utility model relates to rock breaking cutting device technical field discloses a kind of efficient rock breaking cutting device, including cutting drill bit, transmission spline shaft and ejector screw rod, spline sleeve is installed in cutting drill bit, the front end of cutting drill bit is equipped with two through holes, the front end of transmission spline shaft is equipped with two connecting thread holes, and the internal hexagon bolt is threadedly connected in connecting thread hole, and internal hexagon bolt penetrates through hole;The front end of cutting drill bit is equipped with ejector thread hole, when cutting drill bit is disassembled, ejector screw rod is threadedly connected with ejector thread hole, and the one end of ejector screw rod is fixedly connected with handle.The utility model is threadedly connected by ejector screw rod and ejector thread hole, and make the end of ejector screw rod rest in the end of transmission spline shaft, then by continuously rotating ejector screw rod, thereby forcibly ejecting cutting drill bit from transmission spline shaft and disassembling, thereby facilitating the disassembly of the jammed cutting drill bit.

Description

Technical Field

[0001] This utility model belongs to the technical field of rock breaking and cutting devices, specifically a high-efficiency rock breaking and cutting device. Background Technology

[0002] A cantilever tunneling machine is a combined unit capable of cutting, loading, transporting, self-propelled movement, and dust suppression via spraying. Compared to drill-and-blast tunneling machines, cantilever tunneling machines are primarily used in all-rock tunnels and semi-coal-rock tunnels with lower hardness. Their advantages include continuous excavation without blasting vibration, greater freedom in determining the appropriate timing for rock support, reduced over-excavation, savings on rock support and lining costs, greater compactness, greater flexibility in tunneling, relatively higher efficiency, and applicability to any type of support.

[0003] In existing tunneling machines, the cutting head and cutting arm are fixed together using a spline drive and bolts. However, in actual use, the applicant has found that the spline drive connection may become too tight due to friction and wear, increasing the difficulty of disassembly. Furthermore, issues such as spline precision problems, jamming and abnormal noise, wear and corrosion also increase the difficulty of disassembly. To address these problems, a high-efficiency rock-breaking and cutting device is proposed. Utility Model Content

[0004] The purpose of this utility model is to provide a high-efficiency rock-breaking and cutting device in order to solve the problems mentioned above.

[0005] The technical solution adopted by this utility model is as follows: A high-efficiency rock breaking and cutting device includes a cutting drill bit, a transmission spline shaft and an ejector screw. A spline sleeve is installed inside the cutting drill bit. The transmission spline shaft is adapted to the spline sleeve for spline connection. Two through holes are opened at the front end of the cutting drill bit. Two connecting threaded holes are opened at the front end of the transmission spline shaft. An internal hexagon bolt is internally threaded into the connecting threaded hole and the internal hexagon bolt passes through the through hole.

[0006] The cutting drill bit has an ejector threaded hole at its front end. During use, a plug is threaded onto the ejector threaded hole. When the cutting drill bit is disassembled, the plug is removed from the ejector threaded hole. Then, the ejector screw is threaded onto the ejector threaded hole, and a handle is fixedly connected to one end of the ejector screw.

[0007] In a preferred embodiment, a spiral discharge plate is welded to the outer wall of the cutting drill bit.

[0008] In a preferred embodiment, a plurality of tooth seats are welded sequentially along the threaded feed plate on the outer wall of the cutting drill bit, and drill teeth are fixedly installed on the tooth seats.

[0009] In a preferred embodiment, a non-circular groove is provided on the inner wall of the front end of the cutting drill bit, and the front end of the spline sleeve is integrally constructed with a protrusion that is adapted to and engages with the shape of the non-circular groove. The rear side of the spline sleeve is fixedly connected to the cutting drill bit by bolts.

[0010] In a preferred embodiment, the front end of the cutting drill bit is provided with a countersunk groove, the through hole and the ejector threaded hole are disposed in the countersunk groove, and the internal hex bolt and the plug do not extend beyond the countersunk groove.

[0011] In a preferred embodiment, the outer end of the plug has an internal hexagonal groove.

[0012] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0013] 1. In this utility model, by threading the ejector screw to the ejector threaded hole and making the end of the ejector screw abut against the end of the transmission spline shaft, and then continuously rotating the ejector screw by the handle, the cutting drill bit is forcibly ejected from the transmission spline shaft for disassembly, thereby facilitating the disassembly of the jammed cutting drill bit. Attached Figure Description

[0014] Figure 1 This is a simplified schematic diagram of the internal structure of this utility model from the front view;

[0015] Figure 2 This is a simplified exploded view of the cutting head of this utility model;

[0016] Figure 3 This is a simplified three-dimensional structural diagram of the cap in this utility model.

[0017] The markings in the diagram are: 1-cutting drill bit, 2-drive spline shaft, 3-ejector screw, 4-spline sleeve, 5-through hole, 6-connecting threaded hole, 7-internal hex bolt, 8-ejector threaded hole, 9-plug cap, 10-handle, 11-spiral discharge plate, 12-tooth seat, 13-drill tooth, 14-non-circular groove, 15-protrusion, 16-countersunken groove, 17-internal hex recess. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0019] The following will combine Figures 1-3 A detailed description of a high-efficiency rock-breaking and cutting device according to an embodiment of the present invention is provided.

[0020] Example:

[0021] This utility model provides a high-efficiency rock-breaking and cutting device, referencing... Figures 1 to 3 As shown, the device includes a cutting drill bit 1 and a transmission spline shaft 2. A spline sleeve 4 is installed inside the cutting drill bit 1. The transmission spline shaft 2 is splinedly connected to the spline sleeve 4. Two through holes 5 are opened at the front end of the cutting drill bit 1, and two threaded holes 6 are opened at the front end of the transmission spline shaft 2. Hex socket head cap screws 7 are threaded into the threaded holes 6 and pass through the through holes 5. In this structure, the cutting drill bit 1 is mounted on the transmission spline shaft 2 through the spline sleeve 4, thereby realizing the transmission connection with the cutting arm. Then, the hex socket head cap screws 7 pass through the through holes 5 and connect to the threaded holes 6, thereby preventing the cutting drill bit 1 from disengaging from the transmission spline shaft 2, thus achieving stable transmission.

[0022] refer to Figures 1 to 3 As shown, the cutting drill bit 1 includes an ejector screw 3 and an ejector threaded hole 8 at its front end. When disassembling the cutting drill bit 1, the ejector screw 3 is threadedly connected to the ejector threaded hole 8. One end of the ejector screw 3 is fixedly connected to a handle 10. In this structure, if the spline sleeve 4 and the transmission spline shaft 2 become stuck due to long-term use when disassembling the cutting drill bit 1, the operator can thread the ejector screw 3 to the ejector threaded hole 8 and place the end of the ejector screw 3 against the end of the transmission spline shaft 2. Then, by continuously rotating the ejector screw 3 through the handle 10, the cutting drill bit 1 is forcibly ejected from the transmission spline shaft 2 for disassembly, thus facilitating the disassembly of the stuck cutting drill bit 1.

[0023] refer to Figures 1 to 3 As shown, during the use of the cutting drill bit 1, a plug 9 is threadedly connected to the ejector threaded hole 8. When the cutting drill bit 1 is disassembled, the plug 9 will be removed from the ejector threaded hole 8. In this structure, the plug 9 is used to block the ejector threaded hole 8, thereby protecting the ejector threaded hole 8.

[0024] It should be noted that the threads of the plug cap 9 are wrapped with raw rubber tape according to the sealing requirements, so as to make it have a sealing effect.

[0025] refer to Figures 1 to 3 As shown, a spiral discharge plate 11 is welded to the outer wall of the cutting drill bit 1. This structure utilizes the spiral discharge plate 11 to facilitate the discharge of material from the cutting drill bit 1.

[0026] refer to Figures 1 to 3As shown, several tooth seats 12 are welded sequentially along the spiral discharge plate 11 on the outer wall of the cutting drill bit 1. Drill teeth 13 are fixedly installed on the tooth seats 12. In this structure, the drill teeth 13 on the tooth seats 12 are used to cut and crush the coal mine.

[0027] refer to Figures 1 to 3 As shown, a non-circular groove 14 is provided on the inner wall of the front end of the inner cavity of the cutting drill bit 1. The front end of the spline sleeve 4 is integrally constructed with a protrusion 15 that is adapted to the shape of the non-circular groove 14 and engages with it. The rear side of the spline sleeve 4 is fixedly connected to the cutting drill bit 1 by bolts. In this structure, the spline sleeve 4 and the cutting drill bit 1 are connected by bolts, which facilitates disassembly in the future. The setting of the non-circular groove 14 and the protrusion 15 ensures stable transmission between the end of the connecting sleeve 4 and the end of the cutting drill bit 1.

[0028] refer to Figures 1 to 3 As shown, the front end of the cutting drill bit 1 is provided with a sinker 16, and the through hole 5 and the ejector threaded hole 8 are located in the sinker 16. The internal hex bolt 7 and the plug 9 do not extend beyond the sinker 16. In this structure, the sinker 16 is used to protect the internal hex bolt 7 and the plug 9, so as to prevent the internal hex bolt 7 and the plug 9 from directly contacting the coal seam.

[0029] refer to Figures 1 to 3 As shown, the outer end of the plug 9 is provided with an internal hexagonal groove 17. This internal hexagonal groove 17 makes it easy to rotate the plug 9 with a wrench, thus facilitating the installation and removal of the plug 9.

[0030] The implementation principle of a high-efficiency rock-breaking and cutting device according to an embodiment of this application is as follows: When using the device, when disassembling the cutting drill bit 1 that is stuck between the spline sleeve 4 and the transmission spline shaft 2, the operator removes the plug 9 from the ejector threaded hole 8 using a wrench. Then, the operator can thread the ejector screw 3 into the ejector threaded hole 8 and place the end of the ejector screw 3 against the end of the transmission spline shaft 2. Then, the operator continuously rotates the ejector screw 3 using the handle 10 to force the cutting drill bit 1 out of the transmission spline shaft 2 for disassembly, thereby facilitating the disassembly of the stuck cutting drill bit 1.

[0031] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A high-efficiency rock-breaking and cutting device, comprising a cutting drill bit (1), a transmission spline shaft (2), and an ejector screw (3), characterized in that: The cutting drill bit (1) is equipped with a spline sleeve (4), and the transmission spline shaft (2) is adapted to the spline sleeve (4) for spline connection. The cutting drill bit (1) has two through holes (5) at its front end, and the transmission spline shaft (2) has two connecting threaded holes (6) at its front end. The connecting threaded holes (6) are internally threaded with hexagonal socket bolts (7), and the hexagonal socket bolts (7) penetrate the through holes (5). The cutting drill bit (1) has an ejector threaded hole (8) at its front end. During the use of the cutting drill bit (1), a plug (9) is threadedly connected to the ejector threaded hole (8). When the cutting drill bit (1) is disassembled, the plug (9) will be disassembled from the ejector threaded hole (8). Then the ejector screw (3) is threadedly connected to the ejector threaded hole (8). One end of the ejector screw (3) is fixedly connected to a handle (10).

2. The high-efficiency rock-breaking and cutting device as described in claim 1, characterized in that: The outer wall of the cutting drill bit (1) is welded with a spiral discharge plate (11).

3. The high-efficiency rock-breaking and cutting device as described in claim 2, characterized in that: The outer wall of the cutting drill bit (1) is welded with a number of tooth seats (12) along the spiral discharge plate (11), and the tooth seats (12) are fixedly installed with drill teeth (13).

4. The high-efficiency rock-breaking and cutting device as described in claim 1, characterized in that: The cutting drill bit (1) has a non-circular groove (14) on the inner wall of the front end of the inner cavity. The front end of the spline sleeve (4) has an integrally constructed protrusion (15) that is adapted to the shape of the non-circular groove (14) and engages with it. The rear side of the spline sleeve (4) is fixedly connected to the cutting drill bit (1) by bolts.

5. The high-efficiency rock-breaking and cutting device as described in claim 1, characterized in that: The cutting drill bit (1) has a countersunk groove (16) at its front end. The through hole (5) and the ejector threaded hole (8) are located in the countersunk groove (16). The internal hex bolt (7) and the plug (9) do not extend beyond the countersunk groove (16).

6. The high-efficiency rock-breaking and cutting device as described in claim 1, characterized in that: The outer end of the plug (9) is provided with an internal hexagonal groove (17).

Images