Wear-resistant cutting pick for coal mine

Abstract

The utility model provides a wear-resistant coal mine cutting pick, which relates to the technical field of mining cutting picks, and comprises a toothed bar, a snap spring is sleeved on the outer surface of the toothed bar, an outer supporting seat is sleeved on the outer surface of the snap spring, an oil inlet hole is formed in the outer surface of the outer supporting seat in a penetrating manner, an annular groove is formed in the outer surface of the toothed bar close to the bottom, and the outer supporting seat is provided with an oil outlet hole. The annular groove is communicated with the oil inlet hole, a plurality of U-shaped oil channels are formed in the toothed bar at equal intervals in a penetrating mode, and end openings in the bottoms of the U-shaped oil channels are communicated with the annular groove. According to the utility model, through an external lubricating oil pipeline, lubricating oil is conveyed into the annular groove through the oil inlet hole, then is shunted into all the U-shaped oil ducts from the annular groove and overflows from the other ends of the U-shaped oil ducts, the overflowed lubricating oil can lubricate the space between the toothed bar and the snap spring, and the lubricating oil forms a layer of film between two contact surfaces, so that the service life of the toothed bar is prolonged, and the service life of the toothed bar is prolonged. Direct contact between the cutting teeth is reduced, so that friction force and abrasion are reduced, and the service life of the cutting teeth is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of mining picks, in particular to a wear-resistant coal mining pick. Background Art

[0002] In coal mining operations, it is very common to use large-scale mining equipment. These equipment are specially made into huge and powerful mechanical devices for mining coal in underground mines. In order to achieve efficient and continuous mining work, these mining equipment are usually equipped with special mining drills, and the pick is an important part of these drills. The pick breaks the rock and coal through high-speed rotation and lateral thrust movement, and extracts it from underground to the surface, thereby successfully completing the coal mining task.

[0003] The existing pick can rotate on the tooth seat when in use, which helps to evenly distribute the wear. However, when the pick rotates on the tooth seat, friction will be generated, resulting in wear of the contact surface. When the wear is too great, the pick will fall off, thus affecting the service life of the pick. Therefore, we propose a new type of wear-resistant pick for coal mines. Utility Model Content

[0004] The utility model aims to solve the problem in the prior art that when the pick rotates on the tooth seat, friction will be generated, thereby causing wear of the contact surface. When the wear is too large, the pick will fall off, thereby affecting the service life of the pick, and a wear-resistant pick for coal mines is proposed.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a wear-resistant coal mining pick, including a tooth rod, the outer surface of the tooth rod is sleeved with a retaining spring, the outer surface of the retaining spring is sleeved with an outer support seat, the outer surface of the outer support seat is penetrated with an oil inlet hole, the outer surface of the tooth rod is penetrated with an annular groove near the bottom, the annular groove is connected with the oil inlet hole, the interior of the tooth rod is equidistantly penetrated with a plurality of U-shaped oil passages, and the port at the bottom of the U-shaped oil passage is connected with the annular groove.

[0006] Furthermore, a waist block is fixedly connected to a position near the middle of the outer surface of the gear rod, and a pick support seat is fixedly connected to the top of the gear rod.

[0007] Furthermore, a first clamping groove is symmetrically provided on the outer surface of the gear rod near the annular groove, and a second clamping groove is provided on the bottom of the gear rod near the edge.

[0008] Furthermore, a third slot is symmetrically arranged inside the outer support seat near the oil inlet hole, a first sealing ring is arranged between the third slot and the first slot, a fourth slot is arranged at the inner bottom of the outer support seat, and a second sealing ring is arranged between the fourth slot and the second slot.

[0009] Furthermore, a water inlet hole is formed through the bottom of the outer support seat, and a first water channel is formed at the bottom of the gear rod, and the first water channel is connected to the water inlet hole.

[0010] Furthermore, second water channels are equidistantly arranged inside the pick support seat, and the internal port of the second water channel is connected to the first water channel.

[0011] Furthermore, a super-hard steel tooth body is fixedly connected to the top of the pick support seat, a disassembly groove is provided on the outer surface of the super-hard steel tooth body near the bottom, a plurality of alloy beans are embedded on the outer surface of the super-hard steel tooth body, a wear-resistant alloy head is embedded on the top of the super-hard steel tooth body, and a welded wear-resistant layer is provided between the wear-resistant alloy head and the outer surface of the welded wear-resistant layer.

[0012] Compared with the prior art, the advantages and positive effects of the utility model are:

[0013] 1. In the utility model, the lubricating oil is transported to the annular groove through the oil inlet hole through the external lubricating oil pipeline, and then diverted from the annular groove to all U-shaped oil passages, and overflows from the other end of the U-shaped oil passage. The overflowed lubricating oil can lubricate the tooth rod and the retaining spring. The lubricating oil forms a thin film between the two contact surfaces, reducing the direct contact between them, thereby reducing friction and wear, and increasing the service life of the cutting teeth.

[0014] 2. In the utility model, cooling water is transported to the water inlet through an external cooling water pipe, and then diverted from the first water channel to all the second water channels, and sprayed out from the other end of the second water channel, so as to cool the super-hard steel tooth body, alloy bean and wear-resistant alloy head, effectively preventing the pick from generating high temperature and hot melting during use, further extending the overall service life. At the same time, the sprayed cooling water can also absorb external dust to reduce dust flying. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A three-dimensional diagram of a wear-resistant pick for coal mining is provided for the utility model;

[0016] Figure 2 A cross-sectional view of a wear-resistant pick for coal mining is provided for the utility model;

[0017] Figure 3 A cross-sectional view of a tooth bar of a wear-resistant coal mining pick is provided for the utility model;

[0018] Figure 4 A cross-sectional view of an outer support seat of a wear-resistant coal mining pick is provided for the utility model;

[0019] Figure 5The utility model provides a partial structural explosion diagram of a wear-resistant coal mining pick.

[0020] Legend: 1. Gear rod; 11. Waist block; 12. Annular groove; 13. U-shaped oil channel; 14. First slot; 15. Second slot; 16. First water channel; 2. Pick support seat; 21. Second water channel; 3. Superhard steel tooth body; 31. Disassembly and assembly groove; 32. Alloy bean; 33. Wear-resistant alloy head; 34. Welded wear-resistant layer; 4. Retaining spring; 5. External support seat; 51. Oil inlet hole; 52. Water inlet hole; 53. Third slot; 54. Fourth slot; 6. First sealing ring; 7. Second sealing ring. DETAILED DESCRIPTION

[0021] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0022] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0023] Embodiment 1, as Figure 1-Figure 5 As shown, the utility model provides a wear-resistant coal mining pick, including a tooth bar 1, the outer surface of the tooth bar 1 is sleeved with a retaining spring 4, the outer surface of the retaining spring 4 is sleeved with an outer support seat 5, the outer surface of the outer support seat 5 is penetrated with an oil inlet hole 51, the outer surface of the tooth bar 1 is provided with an annular groove 12 near the bottom, the annular groove 12 is connected with the oil inlet hole 51, the interior of the tooth bar 1 is equidistantly penetrated with a plurality of U-shaped oil passages 13, the port at the bottom of the U-shaped oil passage 13 is connected with the annular groove 12, and the outer surface of the tooth bar 1 is fixedly connected near the middle It is connected to a waist block 11, and the top of the gear rod 1 is fixedly connected to a pick support seat 2. The outer surface of the gear rod 1 is symmetrically provided with a first groove 14 near the annular groove 12, and the bottom of the gear rod 1 is provided with a second groove 15 near the edge. The inner part of the outer support seat 5 is symmetrically provided with a third groove 53 near the oil inlet hole 51, and a first sealing ring 6 is provided between the third groove 53 and the first groove 14. The inner bottom of the outer support seat 5 is provided with a fourth groove 54, and a second sealing ring 7 is provided between the fourth groove 54 and the second groove 15.

[0024] The effect achieved by the entire embodiment 1 is that the retaining ring 4 is sleeved on the outside of the gear rod 1, the bottom of the retaining ring 4 can be supported by the waist block 11, and then the first sealing ring 6 and the second sealing ring 7 are respectively embedded in the first groove 14 and the second groove 15, and then the pick is integrally sleeved into the interior of the outer support seat 5. When inserting, a special wrench is used to clamp in the disassembly groove 31, and the pick is knocked into the outer support seat 5. Through the external lubricating oil pipeline, the lubricating oil is transported to the annular groove 12 through the oil inlet hole 51, and then diverted from the annular groove 12 to all U-shaped oil passages 13, and overflows from the other end of the U-shaped oil passage 13. The overflowed lubricating oil can lubricate the gear rod 1 and the retaining ring 4, and the lubricating oil forms a thin film between the two contact surfaces, reducing the direct contact between them, thereby reducing friction and wear, and increasing the service life of the pick.

[0025] Embodiment 2, as Figure 1-Figure 5 As shown, a water inlet hole 52 is formed through the bottom of the outer support seat 5, a first water channel 16 is formed at the bottom of the gear rod 1, the first water channel 16 is connected to the water inlet hole 52, a second water channel 21 is equidistantly formed through the interior of the pick support seat 2, the internal port of the second water channel 21 is connected to the first water channel 16, a super-hard steel tooth body 3 is fixedly connected to the top of the pick support seat 2, a disassembly groove 31 is formed on the outer surface of the super-hard steel tooth body 3 near the bottom, a plurality of alloy beans 32 are embedded on the outer surface of the super-hard steel tooth body 3, a wear-resistant alloy head 33 is embedded on the top of the super-hard steel tooth body 3, and a welded wear-resistant layer 34 is provided between the wear-resistant alloy head 33 and the outer surface of the welded wear-resistant layer 34.

[0026] The effect achieved by the entire embodiment 2 is that the cooling water is transported to the water inlet 52 through an external cooling water pipe, and then diverted from the first water channel 16 to all the second water channels 21, and sprayed out from the other end of the second water channel 21, so as to cool the super-hard steel tooth body 3, the alloy bean 32 and the wear-resistant alloy head 33, effectively preventing the pick from generating high temperature and hot melting during use, thereby further extending the overall service life. At the same time, the sprayed cooling water can also adsorb external dust to reduce dust flying. By arranging the wear-resistant alloy head 33 and the alloy bean 32 on the pick, the wear resistance can be improved, the service life can be extended, the hardness can be enhanced, the material cutting and crushing can be facilitated, the impact resistance can be improved, the stability can be maintained, the work efficiency can be improved, and it can adapt to complex working conditions. At the same time, by arranging the welded wear-resistant layer 34, the surface hardness can be enhanced, so that the pick can withstand greater pressure and friction, and it also plays a role in protecting the firmness of the connection of the wear-resistant alloy head 33.

[0027] Working principle: When in use, the retaining spring 4 is sleeved on the outside of the gear rod 1, and the bottom of the retaining spring 4 can be supported by the waist block 11, and then the first sealing ring 6 and the second sealing ring 7 are respectively embedded in the first groove 14 and the second groove 15, and then the pick is completely sleeved into the inside of the outer support seat 5. When inserting, use a special wrench to clamp it in the disassembly groove 31, and knock the pick into the outer support seat 5. Through the external lubricating oil pipeline, the lubricating oil is transported to the annular groove 12 through the oil inlet hole 51, and then diverted from the annular groove 12 to all the U-shaped oil passages 13, and overflowed from the other end of the U-shaped oil passage 13. The overflowed lubricating oil can be used to lubricate the gear rod 1 and the retaining spring 4 Lubrication is carried out between the two contact surfaces, and the lubricating oil forms a thin film between the two contact surfaces, which reduces the direct contact between them, thereby reducing friction and wear, and increasing the service life of the cutting teeth. The cooling water is transported to the water inlet hole 52 through an external cooling water pipe, and then diverted from the first water channel 16 to all the second water channels 21, and sprayed out from the other end of the second water channel 21, so as to cool the super-hard steel tooth body 3, alloy bean 32 and wear-resistant alloy head 33, effectively preventing the cutting teeth from generating high temperature during use and hot melting, thereby further extending the overall service life. At the same time, the sprayed cooling water can also absorb external dust to reduce dust flying.

[0028] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A wear-resistant coal mining pick, comprising a tooth bar (1), characterized in that: The outer surface of the gear rod (1) is sleeved with a retaining spring (4), the outer surface of the retaining spring (4) is sleeved with an outer support seat (5), the outer surface of the outer support seat (5) is penetrated with an oil inlet hole (51), the outer surface of the gear rod (1) is provided with an annular groove (12) near the bottom, the annular groove (12) is connected with the oil inlet hole (51), and the interior of the gear rod (1) is equidistantly penetrated with a plurality of U-shaped oil passages (13), the ports at the bottom of the U-shaped oil passages (13) are connected with the annular groove (12).

2. The wear-resistant coal mining pick according to claim 1, characterized in that: A waist block (11) is fixedly connected to a position near the middle of the outer surface of the toothed rod (1), and a pick support seat (2) is fixedly connected to the top of the toothed rod (1).

3. The wear-resistant coal mining pick according to claim 1, characterized in that: A first clamping groove (14) is symmetrically provided at a position close to the annular groove (12) on the outer surface of the gear rod (1), and a second clamping groove (15) is provided at a position close to the edge of the bottom of the gear rod (1).

4. The wear-resistant coal mining pick according to claim 1, characterized in that: A third clamping groove (53) is symmetrically arranged at a position near the oil inlet hole (51) inside the outer support seat (5), a first sealing ring (6) is arranged between the third clamping groove (53) and the first clamping groove (14), a fourth clamping groove (54) is arranged at the inner bottom of the outer support seat (5), and a second sealing ring (7) is arranged between the fourth clamping groove (54) and the second clamping groove (15).

5. The wear-resistant coal mining pick according to claim 1, characterized in that: A water inlet hole (52) is formed through the bottom of the outer support seat (5), and a first water channel (16) is formed at the bottom of the gear rod (1), wherein the first water channel (16) is in communication with the water inlet hole (52).

6. The wear-resistant coal mining pick according to claim 2, characterized in that: Second water channels (21) are equidistantly arranged inside the pick support seat (2), and the internal port of the second water channel (21) is in communication with the first water channel (16).

7. The wear-resistant coal mining pick according to claim 2, characterized in that: A super-hard steel tooth body (3) is fixedly connected to the top of the pick support seat (2); a disassembly groove (31) is provided on the outer surface of the super-hard steel tooth body (3) near the bottom; a plurality of alloy beans (32) are embedded on the outer surface of the super-hard steel tooth body (3); a wear-resistant alloy head (33) is embedded on the top of the super-hard steel tooth body (3); and a welded wear-resistant layer (34) is provided between the wear-resistant alloy head (33) and the outer surface of the welded wear-resistant layer (34).

Images