CN211174097U - Coal mining machine rocker arm two-shaft assembly and coal mining machine with ultra-large mining height - Google Patents
Coal mining machine rocker arm two-shaft assembly and coal mining machine with ultra-large mining height Download PDFInfo
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- CN211174097U CN211174097U CN201922155957.4U CN201922155957U CN211174097U CN 211174097 U CN211174097 U CN 211174097U CN 201922155957 U CN201922155957 U CN 201922155957U CN 211174097 U CN211174097 U CN 211174097U
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Abstract
The embodiment of the utility model discloses coal-winning machine rocking arm two-shaft assembly and super large mining height coal-winning machine, including gear, gear shaft, first flat key and the flat key of second, the mounting hole has on the gear, the mounting hole runs through the thickness direction of gear, and is coaxial with the gear, the interval is provided with first flat key groove and the flat key groove of second on the inner wall of mounting hole, and the circumference of mounting hole is followed to first flat key groove and the flat key groove of second distributes, be provided with third flat key groove and the flat key groove of fourth on the gear shaft, the gear shaft inlays to be established in the mounting hole, first flat key inserts first flat key groove and the flat key groove of second respectively, and all with first flat key groove, the interference fit of second flat key groove, third flat key groove and fourth flat key groove are inserted respectively to the second flat key, and all with third flat key groove and the interference fit of fourth. Utilize the embodiment of the utility model provides a not only can improve and dismantle efficiency, but also can improve gear moving stability and reliability, simple structure, convenient assembling simultaneously.
Description
Technical Field
The utility model relates to a coal-winning machine technical field, concretely relates to coal-winning machine rocking arm biaxial assembly and super large mining height coal-winning machine.
Background
The coal mining machine rocker arm is internally provided with a plurality of gear assemblies, and the motor drives the planetary mechanism through the gear assemblies so as to drive the cutting head to rotate. The gear assembly closest to the motor is a two-shaft assembly, and a gear shaft of the two-shaft assembly is connected with the gear through a spline. The inventor is realizing the utility model discloses an in-process discovery adopts splined connection, and the clearance is great, opens at the coal-winning machine and stops the in-process, and gear shaft external splines and gear internal spline strike each other, long-time back of using, gear shaft external splines and gear internal spline can produce the adhesion problem, lead to the gear shaft hardly with the gear separation, the maintenance is wasted time and energy, and is inefficient.
SUMMERY OF THE UTILITY MODEL
In view of this, the embodiment of the utility model provides a coal-winning machine rocking arm biaxial assembly and super large mining height coal-winning machine is proposed to solve above-mentioned technical problem.
The embodiment of the utility model provides a coal-winning machine rocking arm biaxial assembly, it includes: the gear comprises a gear, a gear shaft, a first flat key and a second flat key, wherein the gear is provided with a mounting hole, the mounting hole penetrates through the thickness direction of the gear and is coaxial with the gear, a first flat key groove and a second flat key groove are formed in the inner wall of the mounting hole at intervals and are distributed along the circumferential direction of the mounting hole, a third flat key groove and a fourth flat key groove are formed in the gear shaft, the gear shaft is embedded in the mounting hole, the first flat key is respectively inserted into the first flat key groove and the second flat key groove and is in interference fit with the first flat key groove and the second flat key groove, and the second flat key is respectively inserted into the third flat key groove and the fourth flat key groove and is in interference fit with the third flat key groove and the fourth flat key groove.
Optionally, the gear shaft is in interference fit with the mounting hole.
Optionally, the first flat key groove and the second flat key groove are oppositely arranged.
Optionally, bearings are mounted on both ends of the gear shaft.
Optionally, the gear shaft is in interference fit with the bearing.
Optionally, the device further comprises a housing, and the bearings are all mounted on the housing.
Optionally, the bearing further includes an end cover, the housing has an opening, the end cover is disposed on the opening, the end cover has a recess, and the bearing is located in the recess.
Optionally, the first flat key is inserted into the first flat key groove and the second flat key groove to the same depth, and the second flat key is inserted into the third flat key groove and the fourth flat key groove to the same depth.
Optionally, the groove depths of the first, second, third and fourth flat key grooves are equal.
The embodiment of the utility model provides a super large mining height coal-winning machine is still provided, it includes as above coal-winning machine rocking arm two axle subassemblies.
The embodiment of the utility model provides a coal-winning machine rocking arm two-shaft assembly and super large mining height coal-winning machine through setting up gear, gear shaft, first parallel key and second parallel key, be provided with first keyway and second keyway on the mounting hole inner wall of gear, be provided with third keyway and fourth keyway on the gear shaft, first parallel key and first keyway and third keyway interference fit, second parallel key and second keyway and fourth keyway interference fit, not only can avoid gear shaft external splines and gear internal splines to take place the adhesion problem that strikes each other and cause because the clearance is great, make things convenient for gear shaft and gear to dismantle, improve the dismantlement efficiency, but also can solve the problem that the splined connection can't bear radial load, improve the stability and the reliability of gear operation, and can also avoid the bearing temperature rising problem that gear and gear shaft relatively save and lead to, improve the life of bearing, meanwhile, the structure is simple, and the assembly is convenient.
Drawings
Fig. 1 is a coal-winning machine rocking arm two-shaft assembly of the embodiment of the utility model.
Detailed Description
The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. In which like parts are designated by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.
Fig. 1 shows a schematic structural diagram of a two-shaft assembly of a rocker arm of a coal mining machine provided by an embodiment of the present invention. As shown in fig. 1, the embodiment of the utility model provides a coal-winning machine rocking arm two axle subassemblies include: gear 2, gear shaft 1, first flat key 3 and second flat key 4.
The gear 2 is provided with a mounting hole, and the mounting hole 2 penetrates through the thickness direction of the gear 1 and is coaxial with the gear 1.
The mounting hole is characterized in that a first flat key groove and a second flat key groove are formed in the inner wall of the mounting hole at intervals and are distributed along the circumferential direction of the mounting hole.
The gear shaft 1 is provided with a third flat key groove and a fourth flat key groove, the gear shaft 1 is embedded in the mounting hole, and the first flat key 3 is inserted into the first flat key groove and the second flat key groove respectively and is in interference fit with the first flat key groove and the second flat key groove.
The second flat key 4 is inserted into the third flat key groove and the fourth flat key groove respectively, and is in interference fit with the third flat key groove and the fourth flat key groove.
When in use, the first flat key 3 and the second flat key 4 are respectively inserted into the third flat key groove and the fourth flat key groove of the gear shaft 1.
Then, the first flat key 3 and the second flat key 4 are respectively aligned with the first flat key groove and the second flat key groove, and then the gear shaft 1 is inserted into the mounting hole.
Because the first flat key 3 is in interference fit with the first flat key groove and the second flat key groove, and the second flat key 4 is in interference fit with the third flat key groove and the fourth flat key groove, the coal mining machine is started and stopped, the first flat key 3 is not in interference fit with the first flat key groove and the second flat key groove, and the second flat key 4 is not in mutual impact with the third flat key groove and the fourth flat key groove, so that the problem of adhesion cannot occur.
The embodiment of the utility model provides a coal-winning machine rocking arm two-shaft assembly is through setting up the gear, the gear shaft, first flat key and second flat key, be provided with first flat keyway and second flat keyway on the mounting hole inner wall of gear, be provided with third flat keyway and fourth flat keyway on the gear shaft, first flat key and first flat keyway and third flat keyway interference fit, second flat key and second flat keyway and fourth flat keyway interference fit, not only can avoid gear shaft external splines and gear internal splines because the clearance is great to take place the adhesion problem that strikes each other and cause, make things convenient for gear shaft and gear to dismantle, improve the dismantlement efficiency, but also can solve the problem that the spline connection can't bear radial load, improve gear operational stability and reliability, and can also avoid the bearing temperature rising problem that gear and gear shaft relatively collect and move and lead to the fact, improve the life of bearing, meanwhile, the structure is simple, and the assembly is convenient.
Furthermore, gear shaft 1 and mounting hole interference fit can reduce the clearance between gear shaft 1 and the mounting hole pore wall, transmits moment better.
Preferably, the first flat key groove and the second flat key groove are oppositely arranged, so that torque can be conveniently transmitted, and the gear shaft 1 can better drive the gear 2 to rotate.
Optionally, bearings 5 are sleeved on both ends of the gear shaft 1 to reduce friction force when the gear shaft 1 rotates.
Further, the gear shaft 1 is in interference fit with the bearing 5. The interference fit structure is simple, the centering performance is good, the bearing capacity is high, the impact load can be borne, the weakening of the strength of the gear shaft 1 is small, the service life is prolonged, and the production cost is reduced.
Preferably, the shearer loader arm two-shaft assembly further comprises a housing 6, and the bearing 5 is mounted in the housing 6. The gear 2, the gear shaft 1, the first flat key 3 and the second flat key 4 are all located in the shell 6, and therefore the influence of foreign matters on the normal work of the gear 2 and the gear shaft 1 can be avoided.
In a specific embodiment, the two-shaft assembly of the coal mining machine rocker arm further comprises an end cover 7, the shell 6 is provided with an opening, the end cover 7 is covered on the opening, the end cover 7 is provided with a concave part, and the bearing 5 is positioned in the concave part.
Through setting up end cover 7, not only can conveniently improve maintenance efficiency to bearing 5, still can avoid the foreign matter to get into in the bearing 5. The bearing 5 may be an existing bearing.
Preferably, the depth of the first flat key 3 inserted into the first flat key groove is equal to that of the second flat key groove, and the depth of the second flat key 4 inserted into the third flat key groove is equal to that of the fourth flat key groove, so that the stress of the first flat key 3 and the second flat key 4 in the two flat key grooves is equal, and the gear shaft 1 can better drive the gear 2 to rotate.
In this embodiment, the first, second, third and fourth flat key grooves have the same groove depth, so as to facilitate processing.
In one embodiment, the mounting hole is a circular hole, and the first flat key 3 and the second flat key 4 can be both round-head flat keys.
The embodiment of the utility model provides a super large mining height coal-winning machine is still provided, it includes as above coal-winning machine rocking arm two axle subassemblies.
The coal mining machine with the ultra-large mining height is a coal mining machine which can mining the whole height of more than or equal to 8 meters at one time.
The embodiment of the utility model provides a coal mining machine with super large mining height is through setting up the gear, the gear shaft, first flat key and second flat key, be provided with first flat keyway and second flat keyway on the mounting hole inner wall of gear, be provided with third flat keyway and fourth flat keyway on the gear shaft, first flat key and first flat keyway and third flat keyway interference fit, second flat key and second flat keyway and fourth flat keyway interference fit, not only can avoid gear shaft external splines and gear internal splines because the clearance is great and take place the adhesion problem that strikes each other and cause, make things convenient for gear shaft and gear to dismantle, improve the dismantlement efficiency, but also can solve the problem that the splined connection can't bear radial load, improve gear operational stability and reliability, and also can avoid the bearing temperature rising problem that gear and gear shaft relatively twitch and lead to, improve the life of bearing, while simple structure, the assembly is convenient.
The technical solution of the present invention is described in detail with reference to the specific embodiments, and the described specific embodiments are used to help understand the idea of the present invention. The derivation and modification made by the person skilled in the art on the basis of the specific embodiments of the present invention also belong to the protection scope of the present invention.
Claims (10)
1. A coal mining machine rocker arm two-shaft assembly is characterized by comprising: the gear comprises a gear, a gear shaft, a first flat key and a second flat key, wherein the gear is provided with a mounting hole, the mounting hole penetrates through the thickness direction of the gear and is coaxial with the gear, a first flat key groove and a second flat key groove are formed in the inner wall of the mounting hole at intervals and are distributed along the circumferential direction of the mounting hole, a third flat key groove and a fourth flat key groove are formed in the gear shaft, the gear shaft is embedded in the mounting hole, the first flat key is respectively inserted into the first flat key groove and the second flat key groove and is in interference fit with the first flat key groove and the second flat key groove, and the second flat key is respectively inserted into the third flat key groove and the fourth flat key groove and is in interference fit with the third flat key groove and the fourth flat key groove.
2. The shearer rocker arm two-shaft assembly of claim 1, wherein the gear shaft is an interference fit with the mounting hole.
3. The shearer rocker arm two-shaft assembly of claim 2, wherein the first keyway and the second keyway are oppositely disposed.
4. The shearer rocker arm two-shaft assembly of claim 1, wherein bearings are mounted on both ends of the gear shaft.
5. The shearer rocker arm two-shaft assembly of claim 4, wherein the gear shaft is an interference fit with the bearing.
6. The shearer rocker arm two-axle assembly of claim 5, further comprising a housing, the bearings each mounted on the housing.
7. The shearer rocker arm two-axle assembly of claim 6, further comprising an end cap having an opening therein, the end cap disposed over the opening, the end cap having a recess therein, the bearing being positioned within the recess.
8. The shearer rocker arm two-shaft assembly of any one of claims 1 to 7, wherein the first spline is inserted into the first spline groove and the second spline groove to the same depth, and the second spline is inserted into the third spline groove and the fourth spline groove to the same depth.
9. The shearer rocker arm two-shaft assembly of any one of claims 1 to 7, wherein the first keyway, the second keyway, the third keyway, and the fourth keyway are of equal groove depth.
10. A shearer loader with an ultra-large mining height, characterized by comprising the shearer loader arm two-shaft assembly as set forth in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922155957.4U CN211174097U (en) | 2019-12-04 | 2019-12-04 | Coal mining machine rocker arm two-shaft assembly and coal mining machine with ultra-large mining height |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922155957.4U CN211174097U (en) | 2019-12-04 | 2019-12-04 | Coal mining machine rocker arm two-shaft assembly and coal mining machine with ultra-large mining height |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211174097U true CN211174097U (en) | 2020-08-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922155957.4U Active CN211174097U (en) | 2019-12-04 | 2019-12-04 | Coal mining machine rocker arm two-shaft assembly and coal mining machine with ultra-large mining height |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211174097U (en) |
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2019
- 2019-12-04 CN CN201922155957.4U patent/CN211174097U/en active Active
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