CN216517986U - Cutting pick of coal mine fully-mechanized roadheader - Google Patents

Abstract

The utility model belongs to the technical field of mining mechanical equipment, relates to a cutting tooth, and provides a cutting tooth of a coal mine fully-mechanized excavating machine, which comprises a tool bit, wherein the tool bit, a hard alloy head, a connecting block, an installation fixing block, a tool body, a connecting shaft and a bolt are connected, a rotary cutting opening is formed in the side surface of the tool bit, a buffer ring welded with the bottom surface of the tool bit is arranged between the tool bit and the connecting block, a protection ring welded with the buffer ring is arranged below the buffer ring, an annular groove matched with the protection ring is formed in the side surface of the connecting block, a plurality of bolts located on the inner side of the protection ring are arranged on the outer side surface of the connecting block, a plurality of radial connecting grooves used for being connected with the bolts are formed in the side surface of the connecting shaft, a sunk groove is formed in the bottom of the connecting shaft, a spring is arranged in the sunk groove, and the spring is movably connected with the connecting groove formed in the center of the connecting block. The rock stripping device is reasonable in design, simple in structure, long in service life, high in rock stripping capacity, beneficial to improvement of construction and excavation efficiency and suitable for large-scale popularization.

Description

Cutting pick of coal mine fully-mechanized roadheader

Technical Field

The utility model belongs to the technical field of mining mechanical equipment, relates to a cutting pick, and particularly relates to a cutting pick of a coal mine fully-mechanized roadheader.

Background

The comprehensive mechanical tunneling machine is a comprehensive mechanical device integrating multiple functions of tunneling, rock loading, coal conveying, supporting and nailing. The cutting pick is an important part for excavating operation on the fully-mechanized excavating machine.

The existing patent CN201310520018.X discloses a coal mine fully-mechanized excavating machine cutting pick, which comprises a cutter head, a bolt, an installation fixing block and a cutter body arranged on the right end face of the installation fixing block, wherein a connecting block is arranged on the left end face of the installation fixing block, radiating fins are arranged on the outer surface of the connecting block, the cutter head is arranged on the left end face of the connecting block, a threaded convex block is arranged on the outer surface of the cutter head, a connecting shaft is arranged on the right end face of the cutter head, and the connecting shaft is arranged in the connecting block. This pick is through the screw thread lug that has increased the diamond carbide on the truncation surface, not only wear-resisting and can be in the truncation better with colliery or other article laminating of course for the size of cutting is even, increases the fin on the connecting block, can make the radiating effect show more, and easy dismounting, when the cutting head damages, does not need the whole material of having saved of changing. However, the cutting pick has problems that firstly, the bolt is exposed and is easily impacted by rock or ore, so that the connection capability of the bolt is seriously affected, the connection reliability of the cutter head and the cutter body is low, and the alloy head and the cutter head are often lost together; secondly, the rock stripping capability of the tool bit is poor, and the construction excavation efficiency is influenced.

SUMMERY OF THE UTILITY MODEL

Aiming at the technical problems of the cutting pick, the utility model provides the cutting pick of the fully-mechanized excavating machine for the coal mine, which has the advantages of reasonable design, simple structure, longer service life, higher rock stripping capability and contribution to improving the construction excavation efficiency.

In order to achieve the purpose, the technical scheme adopted by the utility model is that the cutting pick of the coal mine fully-mechanized excavating machine comprises a cutter head, a hard alloy head is arranged at the head of the cutter head, a connecting block, an installation fixing block and a cutter body are sequentially arranged at the tail of the cutter head, a connecting shaft is arranged between the cutter head and the connecting block, the connecting block is connected with the connecting shaft through bolts, a plurality of uniformly distributed triangular conical rotary cutting openings are formed in the side surface of the cutter head, a buffer ring welded with the bottom surface of the cutter head is arranged between the cutter head and the connecting block, a protection ring welded with the buffer ring is arranged below the buffer ring, the bottom surface of the protection ring is welded with the connecting block, an annular groove matched with the protection ring is formed in the side surface of the connecting block, a plurality of bolts located on the inner side of the protection ring are arranged on the outer side surface of the connecting block, a plurality of radial connecting grooves used for being connected with the bolts are arranged on the side surface of the connecting shaft, the bottom of connecting axle is provided with heavy groove, be provided with the spring in the heavy groove, the spring and the spread groove swing joint who sets up at the connecting block center.

Preferably, the buffer ring comprises a solid outer ring, the outer edge of the outer ring is welded with the tool bit and the protection ring through welding spots distributed at intervals along the circumference of the outer ring, two inner rings distributed up and down are arranged on the inner side of the outer ring, and a hollow groove is formed between the inner rings.

Preferably, the difference between the inner and outer radii of the cushion ring is greater than the wall thickness of the guard ring and the outer diameter is not greater than the diameter of the guard ring.

Preferably, the rotary cutting opening comprises two side edges distributed on a generatrix of the cutter head, and the two side edges have different lengths.

Compared with the prior art, the utility model has the advantages and positive effects that:

1. according to the coal mine fully-mechanized excavating machine cutting tooth, the rock stripping capability of the cutting tooth is effectively improved by using the rotary cutting opening; the bolt can be efficiently protected by arranging the protection ring, so that the connection reliability of the bolt for the connecting shaft and the connecting block is improved; simultaneously, adopt the buffering ring that the welding has buffer performance between connecting block and tool bit to be favorable to improving the stability of tool bit, in addition the inside cushioning effect of spring has effectively improved the anti-loss performance of tool bit. This device reasonable in design, simple structure, life are longer, shell that the rock ability is higher and be favorable to improving construction excavation efficiency, are fit for promoting on a large scale.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.

Fig. 1 is a front view of a coal mine fully-mechanized excavating machine pick provided by an embodiment;

fig. 2 is a partial cross-sectional view of a coal mine fully mechanized roadheader pick provided by an embodiment;

FIG. 3 is an enlarged schematic view of the structure A in FIG. 1 according to an exemplary embodiment;

FIG. 4 is an enlarged schematic view of the structure B in FIG. 2 according to an embodiment;

in the above figures, 1, a cutter head; 11. a hard alloy head; 12. cutting the opening in a rotary mode; 13. sinking a groove; 14. a side edge; 2. connecting blocks; 21. an annular groove; 3. mounting a fixed block; 4. a cutter body; 5. a connecting shaft; 51. a radial connecting groove; 6. a bolt; 7. a buffer ring; 71. an outer ring; 72. an inner ring; 73. a hollow groove; 74. welding spots; 8. a guard ring; 9. a spring.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, the present invention will be further described with reference to the accompanying drawings and examples. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict. For convenience of description, the words "upper", "lower", "left" and "right" used herein refer to the same directions as the drawings, and do not limit the structure.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and thus the present invention is not limited to the specific embodiments of the present disclosure.

In the embodiment, as shown in fig. 1-4, the cutting pick of the coal mine fully-mechanized excavating machine provided by the utility model comprises a cutter head 1, a hard alloy head 11 is arranged at the head of the cutter head 1, a connecting block 2, a mounting and fixing block 3 and a cutter body 4 are sequentially arranged at the tail of the cutter head 1, a connecting shaft 5 is arranged between the cutter head 1 and the connecting block 2, and the connecting block 2 is connected with the connecting shaft 5 through a bolt 6. The hard alloy head 11, the mounting and fixing block 3, and the cutter body 4 are prior art, and this embodiment is not described herein again. The key point of the utility model is to improve the structure of the cutting bit 1 and the connecting block 2, and simultaneously, the structure capable of protecting the bolt 6 is added, so as to improve the working performance of the cutting bit.

Specifically, the utility model is provided with a plurality of evenly distributed triangular pyramid-shaped rotary cutting openings 12 on the side surface of a tool bit 1, a buffer ring 7 welded with the bottom surface of the tool bit 1 is arranged between the tool bit 1 and a connecting block 2, a protection ring 8 welded with the buffer ring 7 is arranged below the buffer ring, the bottom surface of the protection ring 8 is welded with the connecting block 2, an annular groove 21 matched with the protection ring 8 is arranged on the side surface of the connecting block 2, a plurality of bolts 6 positioned on the inner side of the protection ring 8 are arranged on the outer side surface of the connecting block 2, a plurality of radial connecting grooves 51 used for being connected with the bolts 6 are arranged on the side surface of a connecting shaft 5, a sinking groove 13 is arranged at the bottom of the connecting shaft 5, a spring 9 is arranged in the sinking groove 13, and the spring 9 is movably connected with the connecting groove arranged at the center of the connecting block 2. Wherein, the side edge of the rotary cutting opening 12 can carry out rotary cutting on a rock stratum or a coal seam, so the rock stripping capability of the cutting pick is effectively improved by utilizing the rotary cutting opening 12. Further, bolt 6 among this pick no longer adopts integrative through form to be connected connecting axle 5 and connecting block 2, but adopts a plurality of bolts 6 to carry out assembled connection from a plurality of directions, protects the outer end of bolt 6 with protection ring 8 moreover, has effectively prolonged bolt 6's actual life, has positive meaning to the loss-proof performance that improves tool bit 1. Simultaneously, the buffering ring 7 that the welding has buffer performance between connecting block 2 and tool bit 1 comes to produce certain cushioning effect to tool bit 1 and connecting block 2 by buffering ring 7, and in addition spring 9's inside cushioning effect has effectively improved the performance of losing of preventing of tool bit 1, can improve bolt 6's shear strength to a certain extent, further improves bolt 6's connection reliability.

In order to improve the connection performance of the buffer ring 7 between the connecting block 2 and the tool bit 1, the buffer ring 7 comprises a solid outer ring 71, the outer edge of the outer ring 71 is welded with the tool bit 1 and the protection ring 8 through welding points distributed at intervals along the circumference of the outer ring 71, two inner rings 72 distributed up and down are arranged on the inner side of the outer ring 71, and a hollow groove 73 is formed between the inner rings 72. The hollow groove 73 serves as a buffer space for the two inner rings 72, the inner rings 72 can be deformed slightly after being pressed to resist external force, and the inner rings 72 dynamically change while the external force changes, so that the stress of welding spots is reduced, and the connection reliability of the tool bit 1 and the connection block 2 is ensured. One section can produce through adopting the spaced solder joint and connect one section clearance, for follow-up change tool bit 1 provides the perk point, is favorable to reducing the unnecessary loss of connecting block 2 to effectively improve the utilization ratio that this pick goes out the 1 outside parts of tool bit.

Further, the present invention provides a cushion ring 7 having an inner and outer radius difference greater than the wall thickness of the protective ring 8 and an outer diameter not greater than the diameter of the protective ring 8. Therefore, the buffering function can be better provided, the connection reliability of the protection ring 8 can be effectively guaranteed, and the working performance of the cutting pick is further guaranteed.

In order to improve the rock stripping capability of the cutting pick, the rotary cutting opening 12 provided by the utility model comprises two side edges 14 distributed on a generatrix of the cutting head 1, and the lengths of the two side edges are different. The coverage of side edge is different, shells the rock scope and just also different, can shell the rock from the multi-angle, has both reduced and shelled rock pressure, improves the shelling ability of pick, can reduce the consumption cost of pick again.

The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention in other forms, and any person skilled in the art may apply the above modifications or changes to the equivalent embodiments with equivalent changes, without departing from the technical spirit of the present invention, and any simple modification, equivalent change and change made to the above embodiments according to the technical spirit of the present invention still belong to the protection scope of the technical spirit of the present invention.

Claims (4)

1. A cutting pick of a coal mine fully-mechanized excavating machine comprises a cutter head, wherein a hard alloy head is arranged at the head of the cutter head, a connecting block, a mounting fixing block and a cutter body are sequentially arranged at the tail of the cutter head, a connecting shaft is arranged between the cutter head and the connecting block, and the connecting block is connected with the connecting shaft through a bolt, the bottom of connecting axle is provided with heavy groove, be provided with the spring in the heavy groove, the spring and the spread groove swing joint who sets up at the connecting block center.

2. The cutting pick of the coal mine fully-mechanized excavating machine according to claim 1, wherein the buffer ring comprises a solid outer ring, the outer edge of the outer ring is welded with the cutter head and the protection ring through welding spots distributed at intervals along the circumference of the outer ring, two inner rings distributed up and down are arranged on the inner side of the outer ring, and a hollow groove is formed between the inner rings.

3. A coal mine roadheader pick as claimed in claim 2, wherein the difference between the inner and outer radii of the buffer ring is greater than the wall thickness of the guard ring and the outer diameter thereof is no greater than the diameter of the guard ring.

4. A coal mine fully mechanized roadheader pick according to claim 3, wherein the cutting opening comprises two side edges distributed on a generatrix of the head and the two side edges have different lengths.

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