Supporting leg structure of coal mining machine

Abstract

The utility model discloses a supporting leg structure of a coal mining machine, which relates to the field of coal mining machines and particularly comprises a supporting leg, a damping structure arranged on the supporting leg and a second pin shaft used for connecting a traction part of the coal mining machine and the supporting leg, a first pin shaft hole and a second pin shaft hole are formed in the supporting leg, and the first pin shaft hole is connected with the first pin shaft in a matched mode. The damping structure comprises a lower seat shell, an upper seat shell in sliding connection with the lower seat shell and a plurality of damping assemblies arranged between the upper seat shell and the lower seat shell, the supporting legs are convenient to disassemble and replace in a pin shaft connection mode, meanwhile, the supporting legs directly use the existing first pin shafts, and the supporting legs are convenient to disassemble and replace. The supporting leg is connected to the first pin shaft, the supporting leg can be rigidly connected to the traction part of the coal mining machine by additionally adopting the second pin shaft, the overall structure is compact, and the shock absorption structure can reduce damage caused by vibration to all parts of the machine body.

Description

Technical Field

[0001] The utility model relates to the field of coal shearers, and particularly to a support leg structure of a coal shearer. Background Art

[0002] At present, when a coal shearer cuts coal underground, especially when cutting coal or rock with relatively high coal quality hardness, the coal shearer will generate a large vibration. This vibration force is mainly transmitted from the coal shearer drum to the rocker arm, and the rocker arm transmits the vibration to the whole machine through hinging with the fuselage. Therefore, shock absorption treatment is required for the support legs. In addition, the fixed end of the oil cylinder for adjusting the rocker arm angle is fixed on the traction part of the coal shearer through a first pin shaft. In order to ensure the connection rigidity between the support leg and the traction part of the coal shearer, the support leg is often welded to the traction part of the coal shearer, but this is not conducive to the replacement of the support leg, and the overall structure is not compact enough. Summary of the Utility Model

[0003] The utility model provides a support leg structure of a coal shearer to solve the problems of lack of shock absorption function of the coal shearer fuselage, inconvenience in replacing the support leg, and non-compact structure.

[0004] The support leg structure of a coal shearer of the utility model adopts the following technical scheme: the device includes: a support leg, a shock absorption structure arranged on the support leg, and a second pin shaft for connecting the traction part of the coal shearer and the support leg;

[0005] A first pin shaft hole and a second pin shaft hole are formed on the support leg. The first pin shaft hole is connected with the first pin shaft in a matching manner, and the second pin shaft hole is connected with the second pin shaft in a matching manner;

[0006] The shock absorption structure includes a lower seat shell, an upper seat shell slidably connected with the lower seat shell, and a plurality of shock absorption components arranged between the upper seat shell and the lower seat shell.

[0007] Preferably, the shock absorption component includes a plug column, a plug sleeve movably sleeved on the lower part of the plug column, and a buffer spring sleeved outside the plug column and the plug sleeve;

[0008] The plug column is hermetically connected with the plug sleeve.

[0009] Preferably, the top end of the plug column is connected with the upper seat shell, and the bottom end of the plug sleeve is connected with the lower seat shell; the top end of the buffer spring abuts against the upper seat shell, and the bottom end of the buffer spring abuts against the lower seat shell.

[0010] Preferably, the inside of the plug sleeve below the plug column is filled with damping grease.

[0011] Preferably, a sealing ring is arranged on the inner side of the top opening of the plug sleeve, and the sealing ring is tightly sleeved outside the plug column.

[0012] Preferably, the second pin shaft is a stepped shaft.

[0013] Preferably, gland covers for limiting the first pin shaft and the second pin shaft are respectively arranged outside the orifices of the first pin shaft hole and the second pin shaft hole.

[0014] The beneficial effects of the present utility model compared with the prior art are as follows:

[0015] 1. In the present utility model, the support leg is connected to the first pin shaft through the first pin shaft hole and is connected to the traction part of the shearer through the second pin shaft, achieving the purpose of rigidly connecting the support leg to the traction part of the shearer. At the same time, the support leg can be conveniently disassembled and replaced by means of pin shaft connection.

[0016] 2. The first pin shaft itself is used to connect the fixed end of the traction part of the shearer and the oil cylinder. In the present utility model, the support leg directly borrows the existing first pin shaft, connects the support leg to the first pin shaft, and then an additional second pin shaft can be used to rigidly connect the support leg to the traction part of the shearer, with a compact overall structure.

[0017] 3. In the present utility model, a shock absorption structure is arranged on the support leg to shock-absorb the entire shearer body and reduce the damage caused by vibration to the components of the body. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 It is a schematic structural diagram of the traction part of the shearer, the oil cylinder, the rocker arm and the present utility model;

[0020] Figure 2 It is a schematic structural diagram of the shock absorption structure of the present utility model;

[0021] Figure 3 It is a schematic structural diagram of the shock absorption component of the present utility model.

[0022] Description of the Reference Numerals in the Drawings

[0023] 1. Support leg; 2. Shock absorption structure; 3. Traction part of the shearer; 4. Second pin shaft; 5. First pin shaft; 6. Gland cover; 7. Rocker arm; 8. Oil cylinder; 11. First pin shaft hole; 12. Second pin shaft hole; 21. Lower seat shell; 22. Upper seat shell; 23. Shock absorption component; 231. Plug column; 232. Plug sleeve; 233. Buffer spring; 234. Damping grease; 235. Sealing ring. Detailed Embodiments

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0025] As Figure 1 shown, in the prior art, the fixed end of the oil cylinder 8 is connected to the shearer traction unit 3 through the first pin shaft 5, and the movable end of the oil cylinder 8 is connected to the rocker arm 7.

[0026] An embodiment of the support leg structure of a shearer according to the present invention, as Figures 1 to 3 shown, the device includes: a support leg 1, a shock absorption structure 2 provided on the support leg 1, and a second pin shaft 4 for connecting the shearer traction unit 3 and the support leg 1;

[0027] The support leg 1 is provided with a first pin hole 11 and a second pin hole 12. The first pin hole 11 is connected in cooperation with the first pin shaft 5, and the second pin hole 12 is connected in cooperation with the second pin shaft 4;

[0028] The shock absorption structure 2 includes a lower seat shell 21, an upper seat shell 22 slidably connected to the lower seat shell 21, and a plurality of shock absorption components 23 provided between the upper seat shell 22 and the lower seat shell 21.

[0029] During actual use of this embodiment, the second pin hole 12 on the support leg 1 is aligned with the hole position on the shearer traction unit 3, the second pin shaft 4 is installed, and then the first pin hole 11 on the support leg 1 is aligned with the original position of the first pin shaft 5, and the first pin shaft 5 is installed in place. At this time, the shearer traction unit 3, the fixed end of the oil cylinder 8, and the support leg 1 share a first pin shaft 5.

[0030] In this embodiment, the shock absorption component 23 includes a plug column 231, a plug sleeve 232 movably sleeved on the lower part of the plug column 231, and a buffer spring 233 sleeved outside the plug column 231 and the plug sleeve 232;

[0031] The plug column 231 is hermetically connected to the plug sleeve 232.

[0032] In this embodiment, the top end of the plug column 231 is connected to the upper seat shell 22, and the bottom end of the plug sleeve 232 is connected to the lower seat shell 21; the top end of the buffer spring 233 abuts against the upper seat shell 22, and the bottom end of the buffer spring 233 abuts against the lower seat shell 21.

[0033] In this embodiment, the inside of the plug sleeve 232 below the plug column 231 is filled with damping grease 234.

[0034] In this embodiment, a sealing ring 535 is provided inside the top opening of the plug sleeve 232, and the sealing ring 535 is tightly sleeved outside the plug post 231.

[0035] In this embodiment, it should be noted that when vibration occurs, the plug post 231 can move inside the plug sleeve 132, and the vibration energy is consumed by the friction between the plug sleeve 232 and the plug post 231 to reduce the transmission of vibration; a sealing ring 232 is also fixedly sleeved inside the plug sleeve 232, and the sealing ring 232 is in interference fit on the surface of the plug post 231. The sealing ring 232 can seal the gap between the plug sleeve 232 and the plug post 231 to prevent the damping grease 234 from leaking out of the plug sleeve 232; the buffer spring 233 can buffer the vibration and reduce the amplitude of the vibration; the damping grease 234 can generate a large resistance, which can retard and buffer the movement of the plug post 231 to make the movement of the plug post 231 more stable.

[0036] In this embodiment, the second pin shaft 4 is a stepped shaft.

[0037] In this embodiment, gland covers 6 for limiting the first pin shaft 5 and the second pin shaft 4 are respectively provided outside the orifices of the first pin shaft hole 11 and the second pin shaft hole 12.

[0038] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A supporting leg structure of a coal mining machine, characterized in that: It comprises a support leg (1), a shock absorbing structure (2) arranged on the support leg (1), and a second pin shaft (4) used for connecting a coal mining machine traction part (3) and the support leg (1); The support leg (1) is provided with a first pin shaft hole (11) and a second pin shaft hole (12), wherein the first pin shaft hole (11) is connected in cooperation with the first pin shaft (5), and the second pin shaft hole (12) is connected in cooperation with the second pin shaft (4); The shock absorbing structure (2) comprises a lower seat shell (21), an upper seat shell (22) slidably connected to the lower seat shell (21), and a plurality of shock absorbing components (23) arranged between the upper seat shell (22) and the lower seat shell (21).

2. A supporting leg structure of a coal mining machine according to claim 1, characterized in that: The shock absorbing assembly (23) comprises a plug (231), a plug sleeve (232) movably sleeved on the lower part of the plug (231), and a buffer spring (233) sleeved on the outside of the plug (231) and the plug sleeve (232); The plug (231) is sealedly connected to the plug sleeve (232).

3. A supporting leg structure of a coal mining machine according to claim 2, characterized in that: The top end of the plug rod (231) is connected to the upper seat shell (22), and the bottom end of the plug sleeve (232) is connected to the lower seat shell (21); the top end of the buffer spring (233) abuts against the upper seat shell (22), and the bottom end of the buffer spring (233) abuts against the lower seat shell (21).

4. A supporting leg structure of a coal mining machine according to claim 2, characterized in that: The plug sleeve (232) below the plug rod (231) is filled with damping grease (234).

5. The supporting leg structure of a coal mining machine according to claim 2, characterized in that: A sealing ring (535) is provided on the inner side of the top opening of the plug sleeve (232), and the sealing ring (535) is tightly sleeved on the outside of the plug rod (231).

6. The supporting leg structure of a coal mining machine according to claim 1, characterized in that: The second pin shaft (4) is a stepped shaft.

7. The supporting leg structure of a coal mining machine according to claim 1, characterized in that: Pressure covers (6) for limiting the first pin shaft (5) and the second pin shaft (4) are respectively arranged outside the openings of the first pin shaft hole (11) and the second pin shaft hole (12).

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