CN-112814672-B - Short-fuselage coal cutter rocker arm structure with wide mining range

CN112814672BCN 112814672 BCN112814672 BCN 112814672BCN-112814672-B

Abstract

The invention relates to a low-fuselage coal mining machine rocker arm structure with a wide mining range, wherein the free ends of a left extension section and a right extension section of an L-shaped transmission box body of a cantilever frame shell and the free ends of a front extension section and a rear extension section of the L-shaped transmission box body are respectively provided with a transmission input interface structure and a transmission output interface structure, the front and rear sides of the left extension section and the right extension section of the transmission box body are respectively provided with a left support arm and a right support arm which extend left and right, the front support arm and the rear support arm are cantilever structures, one ends of the front support arm and the rear support arm are connected to the transmission box body, the front and rear support arms are respectively provided with a front hinge interface structure and a rear hinge interface structure, and the hinge axis of the front hinge interface structure, the hinge axis of the rear hinge interface structure and the rotation axis of the transmission input interface structure are overlapped, and the hinge axis of the front hinge axis and the transmission output interface structure extends along the front and rear directions. The invention has more reliable connection with the fixed reduction gearbox, lower exploitation lower limit and higher exploitation upper limit, and is suitable for exploitation of thin or extremely thin coal seams.

Inventors

ZHANG LIQIANG
CHEN JIAOYING
GUO DAI
QIAN LIQUAN
YU HUITING
HUANG ZHONGDONG
FANG XING
WU ZHENYI
WENG YANGYANG
JIN DANHUA
LI LU
GE HONGBING
WANG ZHAOSHENG
WU LEI
KAN WENHAO
DONG CHAO
HU TAO
HU JING
SONG ZHEN
GU ENYANG
DING HAICHUN
WANG ZHENQIAN

Assignees

天地上海采掘装备科技有限公司
中煤科工集团上海有限公司
中国煤炭科工集团有限公司

Dates

Publication Date: 20260512
Application Date: 20210225

Claims (12)

1. The utility model provides a low fuselage coal-winning machine rocking arm structure with wide exploitation scope, its characterized in that includes the cantilever crane casing, the cantilever crane casing includes L shape's transmission box, the free end of the left and right extension section of transmission box is equipped with transmission input interface structure, the front end of the front and back extension section of transmission box is equipped with transmission output interface structure, the front and back of the left and right extension section of transmission box still is provided with front support arm and back support arm respectively, front support arm and back support arm are the cantilever structure that one end is connected on the transmission box, the top surface of front support arm and back support arm is not higher than the top surface of transmission box, the bottom surface of front support arm and back support arm is not lower than the bottom surface of transmission box, be equipped with front hinge interface structure and back hinge interface structure on front support arm and the back support arm respectively, the hinge axis of front hinge interface structure, back hinge axis and the rotation axis coincidence of transmission input interface structure, and the rotation axis coincidence of transmission output interface structure are along fore-and-aft direction extension.
2. The low-fuselage coal mining machine rocker arm structure with a wide mining range as claimed in claim 1, wherein a rear-stage cutting transmission mechanism is arranged in the transmission box body and comprises a rear-stage head gear, a rear-stage idler gear and a rear-stage gear shaft which are sequentially arranged and meshed for transmission, a spline hole is arranged in the core of the rear-stage head gear, an orifice of the spline hole is positioned on the front end face of the rear-stage head gear, the center line of the spline hole coincides with the center line of the rear-stage head gear, and the center line of the spline hole is the rotation axis of the transmission input interface structure.
3. The low-fuselage shearer ranging arm structure of claim 2, wherein the rear idler has one or more sequentially outer intermeshing.
4. The low-fuselage coal mining machine rocker arm structure with a wide mining range according to claim 3, wherein the front support arm and the rear support arm are respectively provided with a front through hole and a rear through hole, the front through hole and the rear through hole are coaxial, a front transition sleeve and a rear transition sleeve are coaxially and fixedly arranged in the front through hole and the rear through hole respectively, the front transition sleeve and the front through hole form a front hinge joint structure, and the rear transition sleeve and the rear through hole form a rear hinge joint structure.
5. The low-fuselage coal mining machine rocker arm structure with a wide mining range of claim 4, wherein the front support arm and the rear support arm are further provided with a front automatic lubrication device and a rear automatic lubrication device respectively, and lubrication points of the front automatic lubrication device and the rear automatic lubrication device are positioned on the inner hole surfaces of the front transition sleeve and the rear transition sleeve respectively.
6. The low-fuselage coal cutter rocker arm structure with a wide mining range as recited in claim 1,2, 3, 4 or 5, wherein the outer part of the free end of the front support arm is further provided with an oil cylinder connecting lug.
7. The low-fuselage coal mining machine rocker arm structure with a wide mining range as recited in claim 1,2,3, 4 or 5, wherein the front support arm is L-shaped, the free ends of the left and right extension sections of the front support arm are the free ends of the front support arm, the rear ends of the front and rear extension sections of the front support arm are connected with the transmission case, the top surfaces of the front and rear extension sections of the front support arm are inclined surfaces, and the height of the free ends of the front support arm is lower as the front support arm is far away from the front support arm.
8. The low-fuselage shearer loader rocker arm structure with a wide mining range of claim 7, further comprising a roller sleeved on the front-rear extension of the transmission housing and coaxially connected to the transmission output interface structure, wherein the front support arm has an upper-lower thickness smaller than the diameter of the roller.
9. The low-fuselage coal cutter rocker arm structure with a wide mining range of claim 1,2, 3, 4 or 5, wherein the partial top and partial bottom surfaces of the free end of the front support arm are configured as outer cylindrical surfaces coaxial with the hinge axis of the front hinge interface structure.
10. The low-fuselage shearer ranging swing arm structure of claim 6, wherein a portion of the top and bottom surfaces of the free end of the front support arm are disposed as outer cylindrical surfaces coaxial with the hinge axis of the front hinge interface structure.
11. The low-fuselage shearer ranging swing arm structure of claim 7, wherein a portion of the top and bottom surfaces of the free end of the front support arm are disposed as outer cylindrical surfaces coaxial with the hinge axis of the front hinge interface structure.
12. The low-fuselage shearer ranging swing arm structure of claim 8, wherein a portion of the top and bottom surfaces of the free end of the front support arm are disposed as outer cylindrical surfaces coaxial with the hinge axis of the front hinge interface structure.

Description

Short-fuselage coal cutter rocker arm structure with wide mining range Technical Field The invention relates to a rocker arm of a coal mining machine, which is particularly suitable for a low-machine-body coal mining machine, can enlarge the mining range of the corresponding coal mining machine after application, and can be suitable for mining thin coal seams and ultra-thin coal seams of coal-rock working surfaces with more complex geological conditions. Background Early hydraulic shearer (e.g., MG 300-W) have used a fixed reduction gearbox with cutting power and a mating connection structure of a rocker arm without cutting power to obtain a complete cutting function, which has the advantage that the large-size power part does not need to swing along with the rocker arm. The coal mining machine with the structure can be suitable for coal beds with lower mining limit being thinner, but the root connecting cylinder body of the rocker arm with the structure is usually larger in stress and easy to break, and the like. In the existing improved connecting structure suitable for thinner coal seams, as the stress point of the roller is arranged on one side of the support stress point of the arm support, the connecting structure is in a cantilever structure, and the stress of the roller can influence the connection reliability of the support stress point of the arm support. Disclosure of Invention The invention aims to provide a low-fuselage coal mining machine rocker arm structure with a wide mining range, which is more reliably connected with a fixed reduction gearbox, has lower mining lower limit and higher mining upper limit, and is suitable for mining of thin or extremely thin coal seams. The main technical scheme of the invention is as follows: The utility model provides a low fuselage coal-winning machine rocking arm structure with wide exploitation scope, includes the cantilever crane casing, the cantilever crane casing includes the transmission box of L shape, the free end of the left and right extension section of transmission box is equipped with transmission input interface structure, the front end of the front and back extension section of transmission box is equipped with transmission output interface structure, the front and back of the left and right extension section of transmission box still is provided with preceding support arm and back support arm respectively, preceding support arm and back support arm are the cantilever structure that one end is connected on the transmission box, the top surface of preceding support arm and back support arm is not higher than the top surface of transmission box, the bottom surface of preceding support arm and back support arm is not lower than the bottom surface of transmission box, be equipped with preceding articulated interface structure and back articulated interface structure on preceding support arm and the back support arm respectively, the articulated axis of preceding articulated interface structure, back articulated axis and transmission input interface structure coincide, and the axis of revolution with transmission output interface structure is the same and is along the fore-and-aft direction extension. The rear stage cutting transmission mechanism is arranged in the transmission box body and can comprise a rear stage head gear, a rear stage idler gear and a rear stage gear shaft which are sequentially arranged and meshed for transmission, a spline hole is formed in the core of the rear stage head gear, an orifice of the spline hole is positioned on the front end face of the rear stage head gear, the center line of the spline hole is coincident with the center line of the rear stage head gear, and the center line of the spline hole is the rotation axis of the transmission input interface structure. The front support arm and the rear support arm are respectively provided with a front through hole and a rear through hole, the front through hole and the rear through hole are coaxial, a front transition sleeve and a rear transition sleeve are respectively and fixedly installed in the front through hole and the rear through hole, the front transition sleeve and the front through hole form a front hinge joint structure, and the rear transition sleeve and the rear through hole form a rear hinge joint structure. The front support arm and the rear support arm can be respectively provided with a front automatic lubrication device and a rear automatic lubrication device, and lubrication points of the front automatic lubrication device and the rear automatic lubrication device are respectively positioned on the surfaces of inner holes of the front transition sleeve and the rear transition sleeve. The outer part of the free end of the front supporting arm is also preferably provided with an oil cylinder connecting lug. The front support arm can be L-shaped, the free ends of the left and right extending sections of the front support arm are the free ends of the