Firmly-mounted coal mining cutter

Abstract

The utility model discloses a firmly-installed coal mining cutter which comprises a tooth crown, a tooth body detachably connected with the tooth crown, a fixing seat arranged at the bottom of the tooth body and a plurality of fixing holes formed in the fixing seat. The stabilizing device and the fastening device are arranged on the tooth crown and the tooth body; the stabilizing device comprises an internal threaded hole formed in the bottom of the tooth crown and an insertion cylinder which is arranged at the top of the tooth body and can be inserted into the internal threaded hole; the utility model has the beneficial effects that by adopting a detachable splicing mode, when the hard alloy tool bit or the tooth body part of the tooth crown is damaged, only the corresponding damaged part needs to be replaced, and the whole tool does not need to be replaced, so that the use cost is greatly reduced; the connection between the tooth crown and the tooth body is firm and reliable, huge impact force and friction force in the coal mining process can be borne, and the smooth proceeding of mining operation is ensured; the reinforcing ribs are arranged, so that the overall strength of the cutter is further improved, and the service life of the cutter is prolonged.

Description

Technical Field

[0001] This utility model belongs to the field of coal mining technology, specifically relating to a securely installed coal mining cutting tool. Background Technology

[0002] In the process of coal mining, cutting tools are a crucial component; some existing coal mining cutting tools use sparkless cutting teeth.

[0003] The patent publication number CN202882920U discloses a sparkless cutting tooth composed of a tooth body, a tooth crown, and a carbide cutting tip. It uses plasma cladding strengthening technology to clad and weld a spiral nickel-based alloy hardened layer with a thickness of 1-1.5 mm and a height of 30-50 mm around the front end of the tooth crown. The tooth body is used to be installed on mining machinery such as coal mining machines and tunneling machines.

[0004] When a cutting tool is partially damaged, such as when the carbide tip is worn or the tooth body is damaged, the entire tool needs to be replaced. This not only increases mining costs but also affects mining efficiency. Furthermore, in actual operation, the cutting tool needs to withstand enormous impact and friction forces, requiring extremely high installation stability. Existing installation methods may experience loosening and other problems under long-term high-intensity operation, further affecting the smooth progress of mining operations. Utility Model Content

[0005] The purpose of this utility model is to provide a securely installed coal mining cutting tool, solving the problems of existing integrated cutting tool designs that require overall replacement due to partial damage and unstable installation.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a securely installed coal mining cutting tool, comprising a tooth crown, a tooth body detachably connected to the tooth crown, a fixing seat disposed at the bottom of the tooth body, and multiple fixing holes formed inside the fixing seat; further comprising...

[0007] Stabilizing and fastening devices installed on the crown and body of the tooth;

[0008] The stabilizing device includes an internal threaded hole at the bottom of the tooth crown, a plug tube at the top of the tooth body that can be inserted into the internal threaded hole, and an external thread on the outer wall of the plug tube that connects to the internal threaded hole.

[0009] The fastening device includes a first fastening unit and a second fastening unit disposed on the outer wall of the connection between the tooth crown and the tooth body, and the first fastening unit and the second fastening unit are detachable and connectable.

[0010] Preferably, it also includes a first groove symmetrically formed on the first fastening unit, a second groove symmetrically formed on the second fastening unit, a locking bolt extending through the first groove into the interior of the second groove, and a locking nut disposed in the interior of the second groove and screwed to the locking bolt.

[0011] Preferably, it also includes inserts symmetrically arranged at the ends of the first fastening unit and slots symmetrically opened on the second fastening unit.

[0012] Preferably, a limiting ring is installed on the inner wall of the slot, and the outer diameter of the insertion post is adapted to the inner diameter of the limiting ring.

[0013] Preferably, it also includes a socket disposed inside the internal threaded hole and a sealing ring fitted on the socket.

[0014] Preferably, the tooth body is provided with multiple reinforcing ribs, and one end of the tooth crown is provided with a carbide cutting tip.

[0015] Preferably, it further includes a nickel-based alloy hardening layer disposed on the crown, and the thickness of the nickel-based alloy hardening layer is 1 mm.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] By adopting a detachable splicing method, when the carbide tip or tooth body of the tooth crown is damaged, only the damaged part needs to be replaced, without replacing the entire tool, which greatly reduces the cost of use; it makes the connection between the tooth crown and the tooth body firm and reliable, able to withstand the huge impact and friction during coal mining, ensuring the smooth progress of mining operations; the setting of reinforcing ribs further improves the overall strength of the tool and extends the service life of the tool. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the splicing structure of the tooth body and tooth crown of this utility model;

[0020] Figure 3 This is a schematic diagram of the splicing structure of the first fastening unit and the second fastening unit of this utility model.

[0021] Figure 4 For the present utility model Figure 3 A schematic diagram of the enlarged structure of region H in the diagram;

[0022] In the diagram: 1. Tooth crown; 11. Carbide tip; 12. Nickel-based alloy hardened layer; 13. Internal threaded hole; 14. Socket; 140. Sealing ring; 2. Tooth body; 21. Insert; 210. External thread; 3. Reinforcing rib; 4. First fastening unit; 41. First groove; 42. Insert post; 5. Second fastening unit; 51. Second groove; 52. Slot; 6. Locking bolt; 7. Locking nut; 8. Limiting ring. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Example 1

[0025] Please see Figures 1-3 This is the first embodiment of the present invention, which provides a securely installed coal mining cutting tool, including a tooth crown 1, a tooth body 2 detachably connected to the tooth crown 1, the tooth body 2 and the tooth crown 1 being spliced ​​together, and the tooth body 2 being detachable for replacement in case of partial damage. A fixing seat is provided at the bottom of the tooth body 2, thus adding a fixing seat. Multiple fixing holes are provided inside the fixing seat, allowing the fixing seat to be installed on mining machinery such as coal mining machines and tunneling machines through the cooperation of bolts and fixing holes; it also includes...

[0026] Stabilizing and fastening devices are installed on the crown 1 and the body 2 of the tooth;

[0027] The stabilizing device includes an internal threaded hole 13 at the bottom of the tooth crown 1, which enables the opening of the internal threaded hole 13; a plug 21 at the top of the tooth body 2 that can be inserted into the internal threaded hole 13, which enables the addition of the plug 21; and an external thread 210 on the outer wall of the plug 21 that connects to the internal threaded hole 13. The cooperation between the external thread 210 and the internal threaded hole 13 makes the tooth body 2 and the tooth crown 1 firmly joined. In order to further enhance the performance of the joint, a high-strength adhesive can be injected into the joint gap. After curing, the adhesive has high strength and toughness, which can fill the joint gap and further enhance the connection strength between the tooth crown 1 and the tooth body 2.

[0028] The fastening device includes a first fastening unit 4 and a second fastening unit 5 disposed on the outer wall of the connection between the crown 1 and the body 2. The first fastening unit 4 and the second fastening unit 5 can be disassembled and connected. The stable splicing of the first fastening unit 4 and the second fastening unit 5 further strengthens the spliced ​​crown 1 and body 2.

[0029] In this embodiment, preferably, it also includes a first groove 41 symmetrically opened on the first fastening unit 4, realizing the opening of the first groove 41, a second groove 51 symmetrically opened on the second fastening unit 5, realizing the opening of the second groove 51, a locking bolt 6 extending through the first groove 41 into the interior of the second groove 51, and a locking nut 7 set inside the second groove 51 and screwed to the locking bolt 6. After the first fastening unit 4 and the second fastening unit 5 are spliced ​​together, they are stabilized by the cooperation of the locking bolt 6 and the locking nut 7.

[0030] In this embodiment, preferably, a socket 14 is also provided inside the internal threaded hole 13, which realizes the addition of the socket 14. A sealing ring 140 is sleeved on the socket 14. The socket 14 is inserted into the plug tube 21, and the sealing ring 140 is used to further enhance the connection.

[0031] In this embodiment, preferably, the tooth body 2 is provided with multiple reinforcing ribs 3 to increase the bending and impact resistance of the tooth body 2, thereby ensuring the strength of the entire tool under high-intensity operation, and a carbide cutting head 11 is provided at one end of the tooth crown 1.

[0032] In this embodiment, preferably, a nickel-based alloy hardening layer 12 is also provided on the crown 1, and the thickness of the nickel-based alloy hardening layer 12 is 1 mm, which further increases the strength and bending resistance.

[0033] Example 2

[0034] Please see Figures 1-4 This is the second embodiment of the present invention, which is based on the previous embodiment, but differs in that:

[0035] It also includes symmetrically arranged inserts 42 at the ends of the first fastening unit 4, realizing the addition of inserts 42, and symmetrically opened slots 52 on the second fastening unit 5, into which inserts 42 can be inserted. A limiting ring 8 is installed on the inner wall of the slot 52, realizing the addition of limiting ring 8. The outer diameter of inserts 42 is adapted to the inner diameter of limiting ring 8. When the first fastening unit 4 and the second fastening unit 5 are spliced, inserts 42 are inserted into slots 52 along the limiting ring 8, which increases the positioning of the first fastening unit 4 and the second fastening unit 5 when splicing, making it more convenient to stabilize the first fastening unit 4 and the second fastening unit 5 with the cooperation of locking bolts 6 and locking nuts 7.

[0036] The working principle and usage process of this utility model are as follows: The external thread 210 and the internal thread hole 13 are used to make the tooth body 2 and tooth crown 1 stably spliced. The insert 42 is inserted into the slot 52 along the limiting ring 8 to increase the positioning of the first fastening unit 4 and the second fastening unit 5 when splicing. The locking bolt 6 and the locking nut 7 are used to stabilize it. When the tooth body 2 and tooth crown 1 are partially damaged, the damaged part can be disassembled and replaced.

[0037] Although embodiments of the present invention have been shown and described in detail above, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A securely mounted coal mining cutting tool, characterized in that: Includes a tooth crown (1), a tooth body (2) detachably connected to the tooth crown (1), a fixing seat located at the bottom of the tooth body (2), and multiple fixing holes formed inside the fixing seat; also includes Stabilizing and fastening devices are installed on the crown (1) and the body (2) of the tooth; The stabilizing device includes an internal threaded hole (13) at the bottom of the tooth crown (1), a plug (21) at the top of the tooth body (2) and insertable into the internal threaded hole (13), and an external thread (210) on the outer wall of the plug (21) connecting to the internal threaded hole (13). The fastening device includes a first fastening unit (4) and a second fastening unit (5) disposed on the outer wall of the connection between the crown (1) and the body (2), and the first fastening unit (4) and the second fastening unit (5) are detachable and connectable.

2. A securely mounted coal mining cutting tool according to claim 1, characterized in that: It also includes a first groove (41) symmetrically opened on the first fastening unit (4), a second groove (51) symmetrically opened on the second fastening unit (5), a locking bolt (6) extending through the first groove (41) into the second groove (51), and a locking nut (7) provided in the second groove (51) and screwed to the locking bolt (6).

3. A securely mounted coal mining cutting tool according to claim 1, characterized in that: It also includes inserts (42) symmetrically arranged at the ends of the first fastening unit (4) and slots (52) symmetrically opened on the second fastening unit (5).

4. A securely installed coal mining cutting tool according to claim 3, characterized in that: The inner wall of the slot (52) is fitted with a limiting ring (8), and the outer diameter of the insert (42) is adapted to the inner diameter of the limiting ring (8).

5. A securely mounted coal mining cutting tool according to claim 1, characterized in that: It also includes a socket (14) disposed inside the internal threaded hole (13) and a sealing ring (140) fitted on the socket (14).

6. A securely mounted coal mining cutting tool according to claim 1, characterized in that: The tooth body (2) is provided with multiple reinforcing ribs (3), and one end of the tooth crown (1) is provided with a carbide cutting tip (11).

7. A securely mounted coal mining cutting tool according to claim 6, characterized in that: It also includes a nickel-based alloy hardening layer (12) disposed on the crown (1), and the thickness of the nickel-based alloy hardening layer (12) is 1 mm.

Images