Shunting parallel operation gearbox

Abstract

The utility model provides a shunt parallel operation gear box, which relates to the technical field of gear boxes and comprises a box body, a high-speed shaft is rotatably mounted between two sides of the inner wall of the box body through an ultra-precision bearing, and two ends of the high-speed shaft extend to the outside of the box body. Two middle shafts are rotationally installed on one side of the inner wall of the box body through cylindrical roller bearings and four-point angular contact ball bearings, and shaft bodies of the two middle shafts are sleeved with oil inlet rings. According to the utility model, aiming at the model selection of the rolling bearing, the high-speed shaft is connected with the ultra-precision bearing, the size precision and the operation precision of the bearing are higher, the rigidity of the bearing can be greatly improved through the paired use of the bearing and rigid pre-tightening, and the critical rotating speed of the rotor is ensured to meet the use requirement; and the other rolling bearings adopt the configuration of the cylindrical roller bearings and the four-point angular contact ball bearings, so that the use requirements of high rotating speed and large torque are met, the service life of each rolling bearing is greatly prolonged, and the maintenance bureau cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of gear boxes, in particular to a splitter and parallel gear box. Background Art

[0002] The double-splitter cone parallel gearbox adopts a double-splitter structure due to the unique installation method of the aviation test bench, which requires the two output shafts to be aligned and meet the high speed and high torque requirements. To meet the frequent start-up requirements of the aviation test bench, all bearings use rolling bearings. Existing gearboxes using rolling bearings will significantly reduce the bearing life under the high speed and high torque requirements, resulting in frequent bearing replacement and increased maintenance costs. Utility Model Content

[0003] The main purpose of the present invention is to provide a split-and-parallel gearbox, which can effectively solve the problem in the background technology that the life of the bearings of the gearbox will be greatly reduced under the working requirements of high speed and high torque, resulting in the need for frequent replacement of bearings and increased maintenance costs.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A split-flow paralleling gearbox comprises a box body, a high-speed shaft is rotatably mounted between two sides of the inner wall of the box body via super-precision bearings, and both ends of the high-speed shaft extend to the outside of the box body;

[0006] Two intermediate shafts are rotatably mounted on one side of the inner wall of the box using cylindrical roller bearings and four-point angular contact ball bearings, and the shaft bodies of the two intermediate shafts are sleeved with oil inlet rings;

[0007] Two connecting shafts are rotatably mounted on the other side surface of the inner wall of the box, and the shaft bodies of the two connecting shafts are provided with large bevel gears;

[0008] A low-speed shaft is rotatably mounted on the top of the housing, an upper end of the low-speed shaft extends to the outside of the housing, and an oil slinger is sleeved on the low-speed shaft.

[0009] Preferably, an oil inlet flange is provided on one side of the box body, and an oil return flange is provided on the other side of the box body.

[0010] Preferably, one end of the two connecting shafts is connected to the corresponding intermediate shaft via a torsion shaft.

[0011] Preferably, a windshield is provided on one side of the box body, and one end of the high-speed shaft passes through the windshield.

[0012] Preferably, the large bevel gear is fixedly mounted on the connecting shaft body by means of a hinged hole bolt 10 .

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] (1) Regarding the selection of rolling bearings, ultra-precision bearings are used for connection of high-speed shafts. The dimensional accuracy and operating accuracy of the bearings are high. By matching the bearings and using rigid preload, the rigidity of the bearings can be greatly increased to ensure that the critical speed of the rotor meets the use requirements. The rest are configured with cylindrical roller bearings and four-point angular contact ball bearings to meet the use requirements of high speed and high torque, thereby greatly improving the life of each rolling bearing and reducing maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of a split-and-parallel gearbox of the utility model;

[0016] Figure 2 This is a schematic diagram of the top view of a split and parallel gearbox of the utility model;

[0017] Figure 3 This is a utility model of a split and parallel gearbox Figure 2 Schematic diagram of the cross-sectional structure at AA in the middle.

[0018] In the figure: 1. High-speed shaft; 2. Super-precision bearing; 3. Wind deflector; 4. Four-point angular contact ball bearing; 5. Cylindrical roller bearing; 6. Oil inlet ring; 7. Intermediate shaft; 8. Torque shaft; 9. Connecting shaft; 10. Reamed hole bolt; 11. Large bevel gear; 12. Low-speed shaft; 13. Oil slinger; 14. Oil inlet flange; 15. Oil return flange; 16. Housing. DETAILED DESCRIPTION

[0019] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] like Figure 1-Figure 3 As shown, the embodiment of the present invention proposes a split-and-parallel gearbox, comprising a housing 16, a high-speed shaft 1 being rotatably mounted between the inner walls of the housing 16 via super-precision bearings 2, with both ends of the high-speed shaft 1 extending to the outside of the housing 16;

[0021] On one side of the inner wall of the box body 16, two intermediate shafts 7 are rotatably mounted using cylindrical roller bearings 5 ​​and four-point angular contact ball bearings 4. The shaft bodies of the two intermediate shafts 7 are sleeved with oil inlet rings 6.

[0022] Two connecting shafts 9 are rotatably mounted on the other side of the inner wall of the box body 16, and the shaft bodies of the two connecting shafts 9 are provided with large bevel gears 11;

[0023] A low-speed shaft 12 is rotatably mounted on the top of the housing 16 . The upper end of the low-speed shaft 12 extends to the outside of the housing 16 . An oil slinger 13 is sleeved on the shaft of the low-speed shaft 12 .

[0024] Regarding the selection of rolling bearings, the high-speed shaft 1 is connected with an ultra-precision bearing 2. The bearings have high dimensional accuracy and operating accuracy. By pairing the bearings and adopting rigid preload, the rigidity of the bearings can be greatly increased to ensure that the critical speed of the rotor meets the use requirements. The rest are configured with cylindrical roller bearings 5 ​​and four-point angular contact ball bearings 4 to meet the use requirements of high speed and high torque, thereby greatly improving the life of each rolling bearing and reducing maintenance costs.

[0025] In another embodiment of the present invention, an oil inlet flange 14 is provided on one side of the box body 16 , and an oil return flange 15 is provided on the other side of the box body 16 .

[0026] The oil inlet flange 14 and the oil return flange 15 are provided to facilitate the pouring and discharge of lubricating oil.

[0027] In another embodiment of the present invention, one end of the two connecting shafts 9 is connected to the corresponding intermediate shafts 7 via a torsion shaft 8 .

[0028] A torsion shaft 8 is used to connect the intermediate shaft 7 and the connecting shaft 9, and the torsion shaft 8 ensures synchronization and load distribution of the gear meshing.

[0029] In another embodiment of the present invention, a windshield 3 is provided on one side of the box body 16 , and one end of the high-speed shaft 1 passes through the windshield 3 .

[0030] A windshield 3 is installed on the high-speed shaft 1 to solve the influence of negative pressure on the shaft end under high-speed working conditions.

[0031] In another embodiment of the present invention, the large bevel gear 11 is fixedly mounted on the shaft body of the connecting shaft 9 by means of a hinged hole bolt 10 .

[0032] The connecting shaft 9 and the large bevel gear 11 adopt a split structure and are connected by a hinged hole bolt 10, which solves the problem of bevel gear processing under limited space.

[0033] The working principle of a split-flow parallel gearbox:

[0034] During use, with regard to the selection of rolling bearings, the high-speed shaft 1 is connected with an ultra-precision bearing 2. The bearings have high dimensional accuracy and operating accuracy. By pairing the bearings and adopting rigid preload, the rigidity of the bearings can be greatly increased, ensuring that the critical speed of the rotor meets the use requirements. The rest are configured with cylindrical roller bearings 5 ​​and four-point angular contact ball bearings 4 to meet the use requirements of high speed and high torque, thereby greatly improving the life of each rolling bearing and reducing maintenance costs.

[0035] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not limitations on the implementation methods of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is impossible to list all the implementation methods here. All obvious changes or modifications derived from the technical solution of the present invention are still within the scope of protection of the present invention.

Claims

1. A split and parallel gearbox, comprising a box body (16), characterized in that: A high-speed shaft (1) is rotatably mounted between the inner walls of the box (16) via super-precision bearings (2), with both ends of the high-speed shaft (1) extending to the outside of the box (16); Two intermediate shafts (7) are rotatably mounted on one side of the inner wall of the housing (16) using cylindrical roller bearings (5) and four-point angular contact ball bearings (4), and the shaft bodies of the two intermediate shafts (7) are sleeved with oil inlet rings (6); Two connecting shafts (9) are rotatably mounted on the other side surface of the inner wall of the box body (16), and the shaft bodies of the two connecting shafts (9) are provided with large bevel gears (11); A low-speed shaft (12) is rotatably mounted on the top of the housing (16), the upper end of the low-speed shaft (12) extends to the outside of the housing (16), and the shaft body of the low-speed shaft (12) is sleeved with an oil slinger (13).

2. The split-flow parallel gearbox according to claim 1, characterized in that: An oil inlet flange (14) is provided on one side of the box body (16), and an oil return flange (15) is provided on the other side of the box body (16).

3. The split-flow parallel gearbox according to claim 1, characterized in that: One end of the two connecting shafts (9) is connected to the corresponding intermediate shaft (7) via a torsion shaft (8).

4. The split-flow parallel gearbox according to claim 1, characterized in that: A windshield (3) is provided on one side of the box body (16), and one end of the high-speed shaft (1) passes through the windshield (3).

5. The split-flow parallel gearbox according to claim 1, characterized in that: The large bevel gear (11) is fixedly mounted on the shaft body of the connecting shaft (9) via a hinged hole bolt 10.

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