Pickaxe-shaped cutting pick convenient to disassemble and assemble for coal mining machinery

Abstract

The utility model discloses a coal mining machinery pickaxe type cutting pick convenient to disassemble and assemble, which relates to the field of cutting pick installation of mining machines, and comprises a cutting pick handle part, a protruding ring is integrally formed on the top of the cutting pick handle part, a butt joint groove is formed on the periphery of the protruding ring, a cutting pick head part is integrally formed on the top of the protruding ring, and the butt joint groove is formed in the periphery of the protruding ring. A hard alloy head is welded in an opening in the top of the cutting pick head part, clamping mechanisms for clamping the deformation clamping spring are arranged in the middle section of the outer wall of the cutting pick handle part, and a rotating mechanism is arranged in the middle section of the outer wall of the cutting pick handle part and located between the clamping mechanisms. According to the cutting pick, the rotating mechanism is arranged to be matched with the deformation clamp spring, so that the cutting pick can rotate when being stressed in the tunneling process of the cutting pick, the abrasion degree is reduced, the stress is not transmitted to the deformation clamp spring in the tunneling process of the cutting pick, and the connection stability of the deformation clamp spring is kept.

Description

Technical Field

[0001] This utility model relates to the field of cutting tooth installation for mining machines, specifically a pick-type cutting tooth for coal mining machinery that is easy to assemble and disassemble. Background Technology

[0002] Cutting teeth are divided into coal mining machine cutting teeth and tunneling machine cutting teeth. They are parts on mining and tunneling machines and are used in mining.

[0003] In existing technologies, cutting teeth are generally fixed by fasteners. However, the fasteners are inconvenient to install and remove, and they are prone to loosening under stress during the cutting process, resulting in an unstable connection. Utility Model Content

[0004] The purpose of this utility model is to provide a pick-type cutting tooth for coal mining machinery that is easy to assemble and disassemble, in order to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a pick-type cutting tooth for coal mining machinery that is easy to assemble and disassemble, comprising a cutting tooth shank, a protruding ring integrally formed on the top of the cutting tooth shank, a mating groove formed on the outer periphery of the protruding ring, a cutting tooth head integrally formed on the top of the protruding ring, a cemented carbide head welded into the opening at the top of the cutting tooth head, a snap-fit ​​mechanism for snapping a deformation snap spring provided in the middle section of the outer wall of the cutting tooth shank, and a rotating mechanism provided in the middle section of the outer wall of the cutting tooth shank and between the snap-fit ​​mechanisms.

[0006] As a further embodiment of this utility model: the locking mechanism includes an upper limit ring integrally formed on the outer wall of the cutting tooth shank, and the locking mechanism also includes a lower limit ring integrally formed on the outer wall of the cutting tooth shank. The bottom end of the lower limit ring is integrally formed with a guide cone surface, which has a structure that is narrow at the bottom and wide at the top. The outer diameter of the upper limit ring is equal to the maximum outer diameter of the lower limit ring.

[0007] As a further improvement of this utility model: there is space between the upper limit ring and the lower limit ring for mounting the deformation retaining ring and the rotating mechanism.

[0008] As a further embodiment of this utility model: the rotating mechanism includes a connecting ring located in the rotating space, and raceways are provided on the inner circumference of the connecting ring and the outer circumference of the cutting tooth shank, with multiple balls movably connected in the raceways.

[0009] As a further embodiment of this utility model: a deformation groove is vertically formed on the outer periphery of the deformation retaining spring; the inner diameter of the deformation retaining spring in the reset state is smaller than the outer diameter of the upper limit ring, the outer diameter of the deformation retaining spring in the reset state is larger than the outer diameter of the upper limit ring, and the outer diameter of the deformation retaining spring in the compressed state is larger than the outer diameter of the upper limit ring.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] 1. By setting up a rotating mechanism in conjunction with a deformation retaining ring, the cutting tooth can rotate under force during the excavation process to reduce wear, and the force is not transmitted to the deformation retaining ring during the excavation process, thus maintaining the stability of the deformation retaining ring connection. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0014] Figure 3 For the present utility model Figure 2 Enlarged view of a portion of point A in the middle.

[0015] In the figure: 1. Cutting tooth shank; 2. Protruding ring; 3. Connecting groove; 4. Cutting tooth head; 5. Upper limit ring; 6. Lower limit ring; 7. Deformation snap ring; 8. Deformation groove; 9. Carbide head; 10. Guide cone surface; 11. Connecting ring; 12. Ball bearing. Detailed Implementation

[0016] 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.

[0017] Please see Figures 1-3 In this embodiment of the present invention, a pick-type cutting tooth for coal mining machinery that is easy to assemble and disassemble includes a cutting tooth shank 1. A protruding ring 2 is integrally formed on the top of the cutting tooth shank 1. A mating groove 3 is formed on the outer periphery of the protruding ring 2. A cutting tooth head 4 is integrally formed on the top of the protruding ring 2. A carbide head 9 is welded into the opening at the top of the cutting tooth head 4. A snapping mechanism for snapping a deformation snap spring 7 is provided in the middle section of the outer wall of the cutting tooth shank 1. A rotating mechanism is provided in the middle section of the outer wall of the cutting tooth shank 1 and between the snapping mechanisms.

[0018] In this embodiment: Before installing the cutting tooth, one end of the deformation retaining spring 7 is inserted from the tail end of the cutting tooth shank 1 into the outer wall of the cutting tooth shank 1. Then, when the deformation retaining spring 7 contacts the locking mechanism, the deformation retaining spring 7 expands outward under force until it passes the lower half of the locking mechanism. At this time, the deformation retaining spring 7 moves between the two parts of the locking mechanism and is located in the middle section of the cutting tooth shank 1. Then, the tail end of the cutting tooth shank 1 is aligned with the mounting hole of the tooth seat, and... When the deformation retainer 7 is subjected to compressive force, the deformation retainer 7 deforms inward. At this time, the tail end of the cutting tooth shank 1 is inserted into the mounting hole until the outer periphery of the deformation retainer 7, which has deformed inward, is locked in the mounting hole. Then, by tapping the cutting tooth head 4, the cutting tooth is knocked into the mounting hole. The deformation retainer 7 is squeezed by the inner wall of the mounting hole and undergoes elastic deformation, generating radial contraction force, thereby tightly adhering to the inner wall of the mounting hole. This frictional force and clamping force work together to prevent the cutting tooth shank 1 from coming out.

[0019] When the carbide head 9 needs to be replaced due to excessive wear during use, a tool is used to clamp the tool on the inner wall of the mating groove 3. Then, by pulling the device, the pulling force overcomes the friction and clamping force, and the cutting tooth shank 1 can be pulled outward to achieve the disassembly effect. The pulling force can be the hydraulic pulling force provided by the hydraulic device.

[0020] Please refer to this carefully. Figure 1 and Figure 2 The locking mechanism includes an upper limit ring 5 integrally formed on the outer wall of the cutting tooth shank 1, and a lower limit ring 6 integrally formed on the outer wall of the cutting tooth shank 1. The bottom end of the lower limit ring 6 is integrally formed with a guide cone surface 10, which has a structure that is narrow at the bottom and wide at the top. The outer diameter of the upper limit ring 5 is equal to the maximum outer diameter of the lower limit ring 6. There is space between the upper limit ring 5 and the lower limit ring 6 for the installation of the deformation retaining spring 7 and the rotating mechanism.

[0021] In this embodiment: When installing the deformation retaining ring 7, the deformation retaining ring 7 is fitted onto the outer wall of the tail end of the cutting tooth shank 1, and then the deformation retaining ring 7 is pushed to move until the deformation retaining ring 7 contacts the lower narrow end of the guide cone surface 10. At this time, a pushing force is continuously applied. Under the pushing force, the deformation retaining ring 7 expands and deforms outward until the deformation retaining ring 7 and the lower limit ring 6 are completely misaligned. At this time, the deformation retaining ring 7 is located in the installation space position. The design of the guide cone surface 10 facilitates the docking of the deformation retaining ring 7 and the cutting tooth shank 1.

[0022] Please refer to this carefully. Figure 2 and Figure 3 The rotating mechanism includes a connecting ring 11 located in the rotating space. The inner circumference of the connecting ring 11 and the outer circumference of the cutting tooth shank 1 are both provided with raceways. Multiple balls 12 are movably connected in the raceways.

[0023] In this embodiment: During the coal mining process, the cutting tooth shank 1 under stress rotates relative to the connecting ring 11 through the ball bearing 12. This rotatable connection method can reduce the wear of the cutting tooth and improve its service life. The design of the ball bearing 12 and the raceway can reduce the contact area, thereby reducing friction. Furthermore, during the cutting tooth excavation process, the stress is not transmitted to the deformation retaining spring 7, thus maintaining the connection stability of the deformation retaining spring 7.

[0024] Please refer to this carefully. Figure 1 The deformation retaining ring 7 has a deformation groove 8 vertically opened on its outer periphery. In the reset state, the inner diameter of the deformation retaining ring 7 is smaller than the outer diameter of the upper limit ring 5, and the outer diameter of the deformation retaining ring 7 in the reset state is larger than the outer diameter of the upper limit ring 5. In the compressed state, the outer diameter of the deformation retaining ring 7 is larger than the outer diameter of the upper limit ring 5.

[0025] In this embodiment, the inner and outer diameter design of the deformation retainer 7 can avoid interference during the process of the deformation retainer 7 being inserted into the mounting hole. Secondly, the design of the deformation groove 8 facilitates the deformation of the deformation retainer 7.

[0026] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A pick-type cutting tooth for coal mining machinery that is easy to assemble and disassemble, comprising a cutting tooth shank (1), characterized in that, The top of the cutting tooth shank (1) is integrally formed with a protruding ring (2), and the outer periphery of the protruding ring (2) is formed with a mating groove (3). The top of the protruding ring (2) is integrally formed with a cutting tooth head (4). A carbide head (9) is welded into the opening at the top of the cutting tooth head (4). A snapping mechanism for snapping the deformation snap spring (7) is provided in the middle section of the outer wall of the cutting tooth shank (1). A rotating mechanism is provided in the middle section of the outer wall of the cutting tooth shank (1) and between the snapping mechanisms.

2. The pick-type cutting tooth for coal mining machinery that is easy to assemble and disassemble, as described in claim 1, is characterized in that... The snap-fit ​​mechanism includes an upper limit ring (5) integrally formed on the outer wall of the cutting tooth shank (1), and the snap-fit ​​mechanism also includes a lower limit ring (6) integrally formed on the outer wall of the cutting tooth shank (1). The bottom end of the lower limit ring (6) is integrally formed with a guide cone surface (10). The guide cone surface (10) has a structure that is narrow at the bottom and wide at the top. The outer diameter of the upper limit ring (5) is equal to the maximum outer diameter of the lower limit ring (6).

3. A pick-type cutting tooth for coal mining machinery that is easy to assemble and disassemble, as described in claim 2, is characterized in that... There is space between the upper limit ring (5) and the lower limit ring (6) for the deformation retaining ring (7) and the rotating mechanism to be installed.

4. A pick-type cutting tooth for coal mining machinery that is easy to assemble and disassemble, as described in claim 3, is characterized in that... The rotating mechanism includes a connecting ring (11) located in the rotating space. The inner circumference of the connecting ring (11) and the outer circumference of the cutting tooth shank (1) are both provided with raceways. Multiple balls (12) are movably connected in the raceways.

5. A pick-type cutting tooth for coal mining machinery that is easy to assemble and disassemble, as described in claim 4, is characterized in that... The deformation retaining ring (7) has a deformation groove (8) vertically opened on its outer periphery. In the reset state, the inner diameter of the deformation retaining ring (7) is smaller than the outer diameter of the upper limit ring (5). In the reset state, the outer diameter of the deformation retaining ring (7) is larger than the outer diameter of the upper limit ring (5). In the compressed state, the outer diameter of the deformation retaining ring (7) is larger than the outer diameter of the upper limit ring (5).

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