Protective device for rocker arm of coal mining machine

Abstract

The utility model discloses a protection device of a coal mining machine rocker arm, which comprises a protection plate, a plurality of mounting holes and mounting nails, the protection plate is arranged on the outer side of a shell of the coal mining machine rocker arm, the mounting holes are arranged on the protection plate, and the mounting nails are arranged on the mounting holes. And the mounting nails are arranged in the mounting holes in a one-to-one correspondence manner so as to fix the protection plate on a shell of the rocker arm of the coal mining machine. The protection device is simple in structure and easy to mount and dismount, the protection plate and the mounting nail are fixed together in a plug welding mode, it is ensured that the contact faces of the protection plate and the mounting nail are completely attached, and the protection device is stably fixed to the shell of the rocker arm. The shape and the size of the protection device are not specifically limited, different shapes or sizes can be set according to actual needs, and the protection device is suitable for being installed at any position needing protection and is wide in application range.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of coal mining machine, and concretely relates to a protective device of a coal mining machine rocker arm. BACKGROUND

[0002] The coal mining machine is one of important equipments of underground coal mining working face, which cuts coal and rock through the cutting tooth on the drum, and then loads the coal and rock into the scraper conveyor through the spiral blade to transport the coal and rock away. In the coal mining process, the coal mining machine inevitably contacts with the coal and rock to cause abrasion, which seriously reduces the strength of the rocker arm shell, and even grinds through the rocker arm shell. Especially in the thin coal seam working face, the coal and rock cut by the drum is often loaded into the scraper conveyor by the rocker arm. Therefore, in the design of the thin coal seam coal mining machine, the rocker arm surface is often large-area surfacing with wear-resistant layer grid, and high-strength wear-resistant plates are installed on important parts to improve the wear resistance.

[0003] However, in actual application, the surfacing wear-resistant grid is insufficient in height and sparse in distribution, and is fast in abrasion and limited in wear resistance. The high-strength wear-resistant plate can improve the wear resistance, but its price is expensive, and it needs to be fixed and installed through the threaded hole of the shell, which is not suitable for large-area use on the coal mining machine. Therefore, the combination type wear-resistant protection scheme with low price and standardization batch manufacturing and installation is proposed. CONTENT OF THE UTILITY MODEL

[0004] The utility model is carried out in order to solve the above problems, and aims at providing a protective device of a coal mining machine rocker arm, which is used for protecting the rocker arm shell, has low cost, is convenient to disassemble and assemble, and has high wear resistance.

[0005] The utility model provides a protective device of a coal mining machine rocker arm, which comprises a protective plate, a plurality of mounting holes and mounting nails, the protective plate is arranged on the outside of the shell of the coal mining machine rocker arm, the mounting hole is arranged on the protective plate, and the mounting nail is arranged in the mounting hole in one-to-one correspondence to fix the protective plate on the shell of the coal mining machine rocker arm.

[0006] Preferably, the mounting nail is axially provided with a through hole, and the through hole is used for placing a welding rod to fixedly connect the mounting nail and the shell through the plug welding mode.

[0007] Preferably, a gap is arranged between the end of the mounting nail towards the shell and the shell to increase the contact area between the protective plate and the mounting nail after plug welding.

[0008] Preferably, the through hole is located at the central position of the mounting nail, and the diameter of the through hole is smaller than the diameter of the mounting nail.

[0009] Preferably, the shape and size of the mounting nail are matched with the shape and size of the mounting hole.

[0010] Preferably, the top surface of the mounting nail is arranged not lower than the top surface of the mounting hole, so that the top surface of the mounting nail is flush with or arranged higher than the surface of the protective plate.

[0011] Preferably, the plurality of mounting holes are uniformly arranged on the protective plate.

[0012] Preferably, the protective device further comprises a plurality of grooves arranged on the outer sidewall of the protective plate, the grooves being arranged to avoid the mounting holes.

[0013] Preferably, the grooves have a preset depth to accommodate fine and soft coal.

[0014] Preferably, the plurality of grooves are uniformly distributed on the protective plate and form a grid shape.

[0015] On the basis of common knowledge in the art, the above-mentioned preferred conditions can be combined arbitrarily, i.e. to obtain each preferred example of the present application.

[0016] The positive progress effect of the present application is that:

[0017] According to the protective device, the structure is simple, easy to install and disassemble, the protective plate and the mounting nail are fixed together by using the plug welding method, and the contact surface is completely attached, so that the protective device is stably fixed on the shell of the rocker arm. The shape and size of the protective device are not specifically limited, different shapes or sizes can be arranged according to actual needs, and the protective device is suitable for being installed at any position needing protection, and has a wide application range. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a structural diagram of the protective device in the embodiment of the present application.

[0019] Figure 2 is a sectional view of the protective device in the embodiment of the present application.

[0020] Figure 3 is Figure 1 is a sectional view of the mounting hole along the A-A direction.

[0021] Figure 4 is Figure 1 is a sectional view of the groove along the B-B direction.

[0022] Figure 5 is a sectional view of the mounting nail in the embodiment of the present application.

[0023] EXPLANATION OF REFERENCE NUMERALS:

[0024] 100 - protective device

[0025] 10 - protective plate

[0026] 20 - mounting hole

[0027] 30 - mounting pin

[0028] 31 - through hole

[0029] 40 - groove

[0030] 200 - housing of the shearer rocker arm DETAILED DESCRIPTION

[0031] The utility model will be further illustrated by way of examples below, but the utility model is not limited to the scope of the examples described.

[0032] [EMBODIMENT]

[0033] As shown in the drawings, the embodiment discloses a protective device 100 of a shearer rocker arm, which is used for protecting the rocker arm of a shearer (not shown in the drawings) during the coal mining process to prevent the coal seam or the fallen coal blocks from damaging the rocker arm. Figures 1 to 5 As shown in the drawings, the protective device 100 comprises a protective plate 10, a plurality of mounting holes 20 and mounting pins 30, and a plurality of grooves 40.

[0034] Figure 1 The protective plate 10 is arranged outside the housing 200 of the shearer rocker arm, the mounting holes 20 are arranged on the protective plate 10, and the mounting pins 30 are arranged one by one in the mounting holes 20, so as to fix the protective plate on the housing of the shearer rocker arm.

[0035] In a specific embodiment, as shown in the drawings, each mounting pin 30 is axially provided with a through hole 31, and the through hole 31 is used for placing a welding rod to fixedly connect the mounting pin 30 and the housing 200 by means of plug welding.

[0036] Preferably, as shown in the drawings, a gap is arranged between the end of the mounting pin 30 towards the housing 200 and the housing 200, that is to say, the end of the mounting pin 30 towards the housing 200 is recessed in the mounting hole 20 to reserve a gap between the mounting pin 30 and the housing 200. In this way, after plug welding, the welding rod will be filled in the gap, so as to increase the contact area between the housing 200 and the mounting pin 30, ensure that the protective plate 10 is stably connected to the housing 200 through the mounting pin 30, guarantee the effectiveness of the connection, and prevent the protective plate 10 from falling off. Figure 2

[0037] Figure 2

[0038] ​​​​Preferably, the through hole 31 is located at the center of the mounting nail 30, and the diameter of the through hole 31 is smaller than the diameter of the mounting nail 30, so as to ensure that the mounting nail 30 has high strength itself, and further ensure the connection strength between the protection plate 10 and the shell 200 after plug welding.

[0039] Secondly, the shape and size of the mounting nail 30 are matched with the shape and size of the mounting hole 20, and the plurality of mounting holes 20 are uniformly arranged on the protection plate 10, so as to ensure that the mounting nail 30 is firmly embedded in the mounting hole 20.

[0040] In addition, the top surface of the mounting nail 30 is arranged not lower than the top surface of the mounting hole 20, so as to ensure that the top surface of the mounting nail 30 is flush with the surface of the protection plate 10, or the top surface of the mounting nail 30 is arranged higher than the surface of the protection plate 10. In this way, the strength of the protection plate 10 around the mounting nail 30 can be improved, and damage to the remaining protection plate caused by the coal seam or falling coal can be avoided.

[0041] In a specific embodiment, a plurality of grooves 40 are arranged on the outer side wall of the protection plate 10, that is, the grooves 40 are arranged on the surface of the protection plate 10 which contacts the coal seam or falling coal, and the grooves 40 are arranged to avoid the mounting hole 20, so as to ensure the strength of the protection plate 10.

[0042] Preferably, each groove 40 has a predetermined depth to accommodate fine and soft coal. That is to say, during the coal mining process of the coal mining machine, fine and soft coal can be attached to the groove 40, so as to form a layer of elastic buffer protection layer, which can avoid damage to the protection plate 10 caused by the coal block with sharp corners. Therefore, preferably, the plurality of grooves 40 are uniformly distributed on the protection plate 10 and form a grid shape, so as to form comprehensive protection for the surface of the protection plate 10.

[0043] According to the protection device of the embodiment, the structure is simple, easy to install and disassemble, the protection plate and the mounting nail are fixed together by plug welding, and the contact surfaces are completely matched, so that the protection device is stably fixed on the shell of the rocker arm. The shape and size of the protection device, and the shape and size of the groove are not limited, and different shapes or sizes can be arranged according to actual needs, which is suitable for being installed at any position needing protection, and has wide application range.

[0044] Although the specific embodiments of the utility model are described above, those skilled in the art should understand that this is only an example, and the protection scope of the utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the utility model, and these changes and modifications all fall within the protection scope of the utility model.

Claims

1. A guard for a shearer boom, characterised in that, The protective device comprises a protective plate, a plurality of mounting holes and mounting pins. The protective plate is arranged outside the housing of the shearer rocker arm. The mounting holes are arranged on the protective plate. The mounting pins are arranged in the mounting holes one by one to fix the protective plate on the housing of the shearer rocker arm.

2. A guard for a shearer arm as claimed in claim 1, characterised in that, The mounting pin is axially provided with a through hole for placing a welding rod to fixedly connect the mounting pin and the housing by means of plug welding.

3. A guard for a shearer arm as claimed in claim 2, characterised in that, A gap is arranged between the end of the mounting pin towards the housing to increase the contact area between the protective plate and the mounting pin after plug welding.

4. A guard for a shearer arm as claimed in claim 2, characterised in that, The through hole is located at the center of the mounting pin and the diameter of the through hole is smaller than the diameter of the mounting pin.

5. The shearer arm guard as claimed in claim 1, wherein, The shape and size of the mounting pin match the shape and size of the mounting hole.

6. A guard for a shearer arm as claimed in claim 5 wherein, The top surface of the mounting pin is not lower than the top surface of the mounting hole to keep the top surface of the mounting pin flush with the surface of the protective plate or to set the top surface of the mounting pin higher than the surface of the protective plate.

7. The shearer arm guard as claimed in claim 1, wherein, The plurality of mounting holes are uniformly arranged on the protective plate.

8. A guard for a shearer arm as claimed in any one of claims 1 to 7, characterised in that, The protective device further comprises a plurality of grooves arranged on the outer wall of the protective plate.

9. A guard for a shearer arm as claimed in claim 8, characterised in that, The grooves have a preset depth to accommodate fine and soft coal.

10. A guard for a shearer arm as claimed in claim 8, characterised in that, The plurality of grooves are uniformly distributed on the protective plate and form a grid shape.

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