Gear box of open-cast mining machine

Abstract

The utility model discloses a gearbox of an open-cast mining machine, which comprises a box body and an input shaft rotationally arranged on the box body, and a driving bevel gear is arranged at the end part of the input shaft; an intermediate shaft is rotatably arranged in the box body, the axis of the intermediate shaft is perpendicular to the axis of the input shaft, the intermediate shaft is sleeved and fixed with a driven bevel gear, the driving bevel gear is meshed with the driven bevel gear, the two ends of the intermediate shaft are connected with output shafts through splines, and the two output shafts are detachably and rotatably connected to the box body. The two output shafts are arranged on two main machine side plates of the mining machine in a penetrating mode respectively. The double-output gearbox can solve the problem of installation interference of the gearbox output shaft and the main machine side plate, and can also achieve the double-output function.

Description

Technical Field

[0001] This utility model relates to the technical field of open-pit mining, and in particular to a gearbox for an open-pit mining machine. Background Technology

[0002] Gearboxes are used in open-pit mining machines to reduce speed and increase torque, and this is a very mature technology.

[0003] The transfer case of the open-pit mining machine has two-stage sprockets and chains (i.e., power input). The two-stage sprockets and chains are arranged opposite each other, and there are two main machine side plates extended from the mining machine housing between the two-stage sprockets and chains. The two main machine side plates are arranged parallel to each other and spaced apart. Due to the influence of the overall width of the frame, the width between the two main machine side plates is small.

[0004] The gearbox is located between the two main machine side plates, and the dual output ends of the gearbox or the output shafts of the two independent gearboxes are respectively connected to the power input end of the mining machine. However, the gearbox mostly adopts an integral structure, which is inconvenient to install in some mining machines, and may cause interference between the gearbox output shaft and the main machine side plate. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a gearbox for an open-pit mining machine that can solve the problem of interference between the gearbox output shaft and the main machine side plate, and can also realize dual output function.

[0006] To solve the above-mentioned technical problems, the gearbox for the open-pit mining machine provided by this utility model adopts the following technical solution:

[0007] A gearbox for an open-pit mining machine includes a housing and an input shaft rotatably mounted on the housing. A driving bevel gear is provided at the end of the input shaft. An intermediate shaft is rotatably mounted inside the housing, with its axis perpendicular to the axis of the input shaft. A driven bevel gear is sleeved and fixed on the intermediate shaft. The driving and driven bevel gears mesh with each other. Both ends of the intermediate shaft are connected to output shafts via splines. Both output shafts are detachable and rotatably connected to the housing. The two output shafts are respectively mounted on two main side plates of the mining machine.

[0008] By adopting the above technical solution, during the installation of the gearbox with the mining machine, since the output shaft can be separated from the gearbox housing, the housing can be first fixedly installed between the two main machine side plates. Then, the output shaft passes through the opening in the main machine side plate from the side away from the housing, and is then splined to the intermediate shaft inside the housing to achieve torque transmission. Finally, the first bearing housing is fixed to the housing to fix the output shaft relative to the housing. This structure ensures that the output shaft does not interfere with the main machine side plate when the gearbox is installed with the mining machine, and the two symmetrically designed output shafts enable dual-output functionality.

[0009] Optionally, the output shaft is fitted with a first bearing housing, and a first bearing is provided between the first bearing housing and the output shaft. The output shaft is rotatably connected to the first bearing housing, and the first bearing housing is detachably connected to the housing.

[0010] By adopting the above technical solution, the first bearing housing is detachably connected to the housing, and the output shaft is rotatably connected to the first bearing housing via the first bearing, thus enabling the output shaft to be detachably and rotatably connected to the housing.

[0011] Optionally, a mounting base is fixedly connected to the opening edge of the main unit side plate. The mounting base is coaxially arranged with the opening of the main unit side plate, and the first bearing seat passes through the mounting base and is fitted with the inner circular surface of the mounting base.

[0012] By adopting the above technical solution, the mounting base can support the first bearing seat, making the rotation of the output shaft relative to the main unit side plate more stable.

[0013] Optionally, the side panel of the main unit has a stop structure at the opening edge away from the housing, the mounting base is fixed with a snap ring, the snap ring overlaps within the stop structure, and the snap ring is bolted to the side panel of the main unit.

[0014] By adopting the above technical solution, the mounting base can be positioned and installed more accurately through the locking structure and the snap-fit ​​ring, so that the mounting base can better support the first bearing housing.

[0015] Optionally, a mounting ring is fixedly connected to the outer circular surface of the first bearing seat, and the mounting ring is erected and bolted to the housing.

[0016] By adopting the above technical solution, the first bearing seat can be better positioned and installed relative to the housing through the snap-fit ​​between the mounting ring and the edge of the housing opening.

[0017] Optionally, the cross-sectional profile of the inner wall of the first bearing housing is stepped, and the outer ring of the first bearing is installed inside the large end of the inner wall of the first bearing housing.

[0018] By adopting the above technical solution, the first bearing can be better positioned and installed relative to the first bearing housing through the snap-fit ​​between the outer ring of the first bearing and the inner wall of the first bearing housing.

[0019] Optionally, the housing is fixed with a second bearing seat, and a second bearing is provided between the second bearing seat and the input shaft, with the input shaft rotatably connected to the second bearing seat.

[0020] By adopting the above technical solution, the input shaft is fixed to the housing by the second bearing seat, and the input shaft is rotatably connected to the second bearing seat by the second bearing, so that the output shaft can be stably installed and rotatably connected to the housing.

[0021] Optionally, the intermediate shaft is provided with at least one third bearing, the outer ring of the third bearing is fixedly connected to the inside of the housing, and the intermediate shaft and the inner ring of the third bearing are interference-fitted.

[0022] By adopting the above technical solution and setting the third bearing, the intermediate shaft is stably installed and rotatably connected to the housing, so that the torque of the input shaft can be stably and effectively transmitted to the two symmetrically designed output shafts.

[0023] In summary, this utility model has at least one of the following beneficial technical effects:

[0024] 1. Since the output shaft can be separated from the gearbox housing, there will be no problem of interference between the output shaft and the main unit side plate when the gearbox is installed with the mining machine. Furthermore, the dual output function can be achieved through the two symmetrically designed output shafts.

[0025] 2. The first bearing housing is detachably connected to the housing, and the output shaft is rotatably connected to the first bearing housing via the first bearing, thus enabling the output shaft to be detachably and rotatably connected to the housing.

[0026] 3. The mounting base can support the first bearing housing, making the rotation of the output shaft relative to the main unit side plate more stable. Attached Figure Description

[0027] Figure 1 This utility model is a schematic diagram illustrating the structure of a gearbox for an open-pit mining machine.

[0028] Explanation of reference numerals in the attached drawings: 1. Input shaft; 2. Second bearing A; 3. Second bearing B; 4. Second bearing housing; 5. Driven bevel gear; 6. Intermediate shaft; 7. Third bearing; 8. First bearing; 9. Output shaft; 10. First bearing housing; 11. Mounting base; 12. Main unit side plate; 13. Housing. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1 The present invention will be described in further detail below.

[0030] This utility model discloses a gearbox for an open-pit mining machine. (Refer to...) Figure 1 The gearbox of the open-pit mining machine includes a housing 13, an input shaft 1, an intermediate shaft 6, and an output shaft 9. A second bearing seat 4, cylindrical in shape, is fixedly connected to one side wall of the housing 13. The input shaft 1 passes through the second bearing seat 4 along its central axis. Two second bearings are provided between the second bearing seat 4 and the input shaft 1, and the input shaft 1 is rotatably connected to the second bearing seat 4 via the two second bearings. By fixing the output shaft 9 to the housing 13 via the second bearing seat 4 and rotatably connecting the input shaft 1 to the second bearing seat 4 via the second bearings, the output shaft 9 can be stably installed and rotatably connected to the housing 13.

[0031] Reference Figure 1 The input shaft 1 is fixedly connected to a drive bevel gear at its end within the housing 13. The drive bevel gear and the input shaft 1 are aligned on the same central axis. Two third bearings 7 are installed inside the housing 13, also aligned on the same central axis. The outer rings of the two third bearings 7 are fixedly connected to the inner wall of the housing 13. An intermediate shaft 6 passes through both third bearings 7, with an interference fit between the intermediate shaft 6 and the inner rings of the two third bearings 7. The axis of the intermediate shaft 6 is perpendicular to the axis of the input shaft 1. A driven bevel gear 5 is fitted and fixed onto the intermediate shaft 6, and the drive bevel gear and the driven bevel gear 5 mesh with each other. Countersunk holes are formed at both ends of the intermediate shaft 6, and splines are provided on the inner walls of the countersunk holes. The two ends of the intermediate shaft 6 are connected to the two output shafts 9 via splines, and both output shafts 9 are aligned on the same central axis as the intermediate shaft 6. Furthermore, the installation of the third bearings 7 ensures that the intermediate shaft 6 is stably installed and rotatably connected to the housing 13, enabling stable and effective transmission of the torque from the input shaft 1 to the two symmetrically designed output shafts 9.

[0032] Reference Figure 1 Both output shafts 9 pass through corresponding openings in the housing 13. Each output shaft 9 is fitted with a first bearing housing 10, and a first bearing 8 is positioned between the first bearing housing 10 and the output shaft 9. The outer ring of the first bearing 8 is coaxially fixed to the first bearing housing 10, and the inner rings of the output shaft 9 and the first bearing 8 are interference-fitted. The output shaft 9 is rotatably connected to the first bearing housing 10 via the first bearing 8, and the first bearing housing 10 is detachably connected to the housing 13. This detachable connection of the output shaft 9 to the housing 13, and its rotatable connection to the first bearing housing 10 via the first bearing 8, allows for a detachable and rotatable connection of the output shaft 9 to the housing 13. The two output shafts 9 are respectively installed on the two main body side plates 12 of the mining machine.

[0033] During the installation of the gearbox with the mining machine, since the output shaft 9 can be separated from the gearbox housing 13, the housing 13 can be first fixedly installed between the two main machine side plates 12. Then, the output shaft 9 passes through the opening of the main machine side plate 12 from the side away from the housing 13. Finally, the output shaft 9 and the intermediate shaft 6 inside the housing 13 are splined together to achieve torque transmission. This structure ensures that the output shaft 9 does not interfere with the main machine side plate 12 when the gearbox is installed with the mining machine, and the two symmetrically designed output shafts 9 enable dual output functionality.

[0034] Reference Figure 1 To enable the first bearing housing 10 to be detachably connected to the housing 13, a mounting ring is fixedly connected to the outer surface of the first bearing housing 10. The mounting ring is coaxially arranged with the first bearing housing 10 and is bolted to the housing 13. Through the snap-fit ​​engagement between the mounting ring and the edge of the opening of the housing 13, the first bearing housing 10 can be better positioned and installed relative to the housing 13.

[0035] Reference Figure 1 The cross-sectional profile of the inner wall of the first bearing housing 10 is stepped, and the larger end of the inner wall of the first bearing housing 10 is located away from the intermediate shaft 6. The outer ring of the first bearing 8 is installed inside the larger end of the inner wall of the first bearing housing 10. Through the snap-fit ​​engagement between the outer ring of the first bearing 8 and the inner wall of the first bearing housing 10, the first bearing 8 can be better positioned and installed relative to the first bearing housing 10.

[0036] Reference Figure 1 To ensure more stable rotation of the output shaft 9 relative to the main unit side plate 12, a mounting base 11 is provided along the opening edge of the main unit side plate 12. The mounting base 11 has a ring-shaped structure and is coaxially arranged with the opening of the main unit side plate 12. A stop structure is provided along the opening edge of the main unit side plate 12 away from the housing 13. A snap-fit ​​ring is coaxially fixed to the outer edge of the mounting base 11, overlapping within the stop structure and bolted to the main unit side plate 12. Through the snap-fit ​​cooperation of the stop structure and the snap-fit ​​ring, the mounting base 11 can be positioned and installed more accurately, allowing it to better support the first bearing seat 10. The mounting base 11 supports the first bearing seat 10, making the rotation of the output shaft 9 relative to the main unit side plate 12 more stable.

[0037] The implementation principle of the gearbox for an open-pit mining machine according to this utility model embodiment is as follows: During the installation of the gearbox with the mining machine, since the output shaft 9 can be separated from the gearbox housing 13, the housing 13 can be fixedly installed between the two main machine side plates 12 first. The output shaft 9 passes through the opening of the main machine side plate 12 from the side away from the housing 13. Then, the output shaft 9 and the intermediate shaft 6 inside the housing 13 are splined to achieve torque transmission. Finally, the first bearing seat 10 is bolted to the housing 13 to fix the output shaft 9 relative to the housing 13. The above structure ensures that the output shaft 9 and the main machine side plate 12 will not interfere with each other when the gearbox is installed with the mining machine, and the dual-output function can be achieved through the two symmetrically designed output shafts 9.

[0038] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A gearbox for an open-pit mining machine, characterized in that: The device includes a housing (13) and an input shaft (1) rotatably mounted on the housing (13). The input shaft (1) is provided with a driving bevel gear at its end. An intermediate shaft (6) is rotatably mounted inside the housing (13). The axis of the intermediate shaft (6) is perpendicular to the axis of the input shaft (1). A driven bevel gear (5) is sleeved and fixed on the intermediate shaft (6). The driving bevel gear and the driven bevel gear (5) mesh with each other. Both ends of the intermediate shaft (6) are connected to output shafts (9) via splines. Both output shafts (9) are detachable and rotatably connected to the housing (13). The two output shafts (9) are respectively mounted on the two main side plates (12) of the mining machine.

2. The gearbox for an open-pit mining machine according to claim 1, characterized in that: The output shaft (9) is fitted with a first bearing seat (10), and a first bearing (8) is provided between the first bearing seat (10) and the output shaft (9). The output shaft (9) is rotatably connected to the first bearing seat (10), and the first bearing seat (10) is detachably connected to the housing (13).

3. The gearbox for an open-pit mining machine according to claim 2, characterized in that: A mounting base (11) is fixedly connected to the opening edge of the main unit side plate (12). The mounting base (11) is coaxially arranged with the opening of the main unit side plate (12). The first bearing seat (10) passes through the mounting base (11) and is fitted to the inner circular surface of the mounting base (11).

4. The gearbox for an open-pit mining machine according to claim 3, characterized in that: The side panel (12) of the main unit has a stop structure at the opening edge away from the housing (13). The mounting base (11) is fixed with a snap ring. The snap ring overlaps in the stop structure and is bolted to the side panel (12) of the main unit.

5. A gearbox for an open-pit mining machine according to claim 2, characterized in that: An installation ring is fixedly connected to the outer circular surface of the first bearing seat (10), and the installation ring is erected and bolted to the housing (13).

6. The gearbox for an open-pit mining machine according to claim 2, characterized in that: The cross-sectional profile of the inner wall of the first bearing housing (10) is stepped, and the outer ring of the first bearing (8) is installed in the large end of the inner wall of the first bearing housing (10).

7. The gearbox for an open-pit mining machine according to claim 1, characterized in that: The housing (13) is fixed with a second bearing seat (4), and a second bearing is provided between the second bearing seat (4) and the input shaft (1). The input shaft (1) is rotatably connected to the second bearing seat (4).

8. The gearbox for an open-pit mining machine according to claim 1, characterized in that: The intermediate shaft (6) is provided with at least one third bearing (7), the outer ring of the third bearing (7) is fixedly connected to the inside of the housing (13), and the inner ring of the intermediate shaft (6) and the third bearing (7) are interference fit.

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