CN220082078U - Transmission reversing mechanism for small aeroengine - Google Patents
Transmission reversing mechanism for small aeroengine Download PDFInfo
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- CN220082078U CN220082078U CN202321477996.6U CN202321477996U CN220082078U CN 220082078 U CN220082078 U CN 220082078U CN 202321477996 U CN202321477996 U CN 202321477996U CN 220082078 U CN220082078 U CN 220082078U
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 41
- 230000007246 mechanism Effects 0.000 title claims abstract description 14
- 238000005096 rolling process Methods 0.000 claims description 30
- 238000009434 installation Methods 0.000 abstract description 3
- 238000007789 sealing Methods 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 12
- 238000000034 method Methods 0.000 description 3
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- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
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- 239000000446 fuel Substances 0.000 description 1
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Abstract
The utility model aims to provide a transmission reversing mechanism for a small aeroengine, which consists of a box body, a shaft, a gear pair, a bearing and a fastening bolt. The box body provides an installation space for the shafts, the gear pairs and the fastening bolts, the gear pairs are provided with straight-tooth gear pairs and bevel gear pairs, and the transmission and the final reversing of power among the shafts are realized through the mutual matching of the two gear pairs; the bearing plays a role in supporting the shaft and sealing the operating environment; the transmission reversing mechanism has the characteristics of simple structure, compact arrangement, high efficiency and stable and reliable output, and the adoption of the structure is beneficial to optimizing the overall structural size of the engine and facilitating the arrangement of the engine in an unmanned aerial vehicle.
Description
Technical Field
The utility model relates to a transmission reversing mechanism for a small aeroengine, belonging to the part structure of an internal combustion engine.
Background
Unmanned aerial vehicles have been rapidly developed in recent years due to advances in technology. Excellent characteristics of unmanned aerial vehicle: the device is small, light and unmanned, and can be widely applied to the fields of military reconnaissance, striking and the like. Unmanned aerial vehicles are mainly of the electric type and the fuel type. The fuel oil type unmanned aerial vehicle has the advantages of wide application range, strong power, high speed, long range and the like, and plays a leading role in the field of military unmanned aerial vehicles.
In the field of small unmanned aerial vehicles, the unmanned aerial vehicle is often pushed to move forward by adopting a mode of directly driving a propeller by an engine, and the mode is simple and reliable and does not need excessive transmission mechanisms. However, the engine direct drive mode has high requirements on the transverse space of the power cabin of the unmanned aerial vehicle, and particularly for the unmanned aerial vehicle with a large aspect ratio, the cross section size of the unmanned aerial vehicle is severely limited, but the unmanned aerial vehicle is relatively wide in the length direction. This presents a great difficulty in arrangement for the way the engine drives the propeller directly: the size (power) of the whole machine is contradictory with the arrangement space of the machine body.
Disclosure of Invention
In order to solve the problems, the utility model aims to provide a transmission reversing mechanism for a small aeroengine, which consists of a box body, a shaft, a gear pair, a bearing and a fastening bolt. The box body is divided into a main shell, side shells and a front shell, corresponding bearing mounting seats are designed on each shell, the side shells are mounted on the side end faces of the main shell, the front shell is mounted on the front end faces of the main shell and respectively fastened by fastening bolts, and mounting space is provided for the other four parts; the shaft is divided into an input shaft, a transmission shaft and an output shaft; the gear pair is divided into a cylindrical straight gear I, a cylindrical straight gear II, a bevel gear I and a bevel gear II; the bearing comprises a rolling bearing, a needle bearing and a rolling bearing with an oil seal; the input shaft is sequentially provided with a rolling bearing with an oil seal, a cylindrical straight gear I and a rolling bearing; the two ends of the transmission shaft are provided with a rolling bearing and a needle bearing, and the middle of the transmission shaft is provided with a cylindrical straight gear II and a bevel gear I in sequence; the middle of the output shaft is provided with a rolling bearing and a rolling bearing with an oil seal, and one end of the output shaft is provided with a bevel gear II.
Preferably, the main housing of the transmission reversing mechanism for the small aero-engine is an engine crankcase, and the input shaft is an engine crankshaft.
Advantageous effects
The transmission reversing mechanism for the small aero-engine, disclosed by the utility model, completes transmission reversing of power output of the engine through mutual engagement of the two pairs of gear pairs, and has the advantages of high efficiency and stable and reliable output. The external space of the crankcase is fully utilized to accommodate the gear pair in design, so that the parts of the system are reduced, and meanwhile, the compactness of the system is greatly enhanced. By adopting the transmission reversing mechanism, the power output direction of the engine is regulated to the plane of the movement direction of the engine piston, so that the transverse size of the engine is greatly reduced, and more favorable conditions are provided for the arrangement of the engine in the unmanned aerial vehicle with a large length-width ratio.
Drawings
FIG. 1 is a state diagram of the present utility model;
in the figure:
1-a main housing; 2-side housing; 3-a front housing; 4-fastening bolt
FIG. 2 is a cross-sectional view taken at A-A of FIG. 1;
in the figure:
5-an input shaft; 6-rolling bearings; 7-a cylindrical spur gear I; 8-a cylindrical spur gear II;
9-a transmission shaft; 10-bevel gears I; 11-bevel gear II; 12-propeller connecting flanges;
13-an output shaft; 14-rolling bearing with oil seal; 15 needle roller bearings;
FIG. 3 is a front view of the main housing;
in the figure:
101-a bearing mount; 102-a needle bearing mounting seat; 103-main housing side end face;
FIG. 4 is a side view of the main housing;
in the figure:
104-a front end face of the main housing;
FIG. 5 is a front view of the front housing;
in the figure:
301-front housing side end face.
Description of the embodiments
The structure of the utility model is further described below with reference to the accompanying drawings:
as shown in fig. 1 to 5, the transmission reversing mechanism for the small aero-engine provided by the utility model is characterized in that the box body is divided into a main shell (1), side shells (2) and a front shell (3), corresponding bearing mounting seats are designed on each shell, the side shells (2) are mounted on the side end surfaces (103) of the main shell, the front shell (3) is mounted on the front end surface (104) of the main shell, and the front shell is respectively fastened by fastening bolts (4), so that mounting space is provided for the other four parts; the shaft is divided into an input shaft (5), a transmission shaft (9) and an output shaft (13); the gear pair is divided into a cylindrical straight gear I (7) and a cylindrical straight gear II (8), and a bevel gear I (10) and a bevel gear II (11); the bearing is provided with a rolling bearing (6), a needle bearing (15) and a rolling bearing (14) with an oil seal; the input shaft (5) is sequentially provided with an oil seal rolling bearing (14), a cylindrical straight gear I (7) and a rolling bearing (6); the two ends of the transmission shaft (9) are provided with a rolling bearing (6) and a needle bearing (15), and a cylindrical spur gear II (8) and a bevel gear I (10) are sequentially arranged in the middle; the middle of the output shaft (13) is provided with a rolling bearing (6) and a rolling bearing (14) with an oil seal, and one end of the output shaft is provided with a bevel gear II (11). The spur gear I (7) and the spur gear II (8) are meshed with each other, the bevel gear I (10) and the bevel gear II (11) are meshed with each other, and power transmission between shafts is completed. The transmission shaft (9) is arranged in parallel with the input shaft (5), and the output shaft (13) is arranged perpendicular to the transmission shaft (9), so that the conversion of the power output direction of the engine is completed.
Preferably, the main shell (1) is an engine crank case, and the input shaft (5) is an engine crank case, so that the whole structure is simpler and more compact, and the size of the whole machine is further reduced.
Further, different output ratios can be obtained by changing the gear number ratio of the gear pair.
Furthermore, the rolling bearing (14) with the oil seal is used at the shaft sealing part, the independent oil seal design is removed, the shell structure is simplified, and the whole quality is reduced.
Assembly process
Split charging transmission assembly: the bevel gear I (10) and the cylindrical straight gear II (8) are respectively arranged on the corresponding installation positions of the transmission shaft (9); and (5) split charging and outputting assembly: based on the front shell (3), an oil seal rolling bearing (14), an output shaft (13), a rolling bearing (6), a bevel gear II (11) and a propeller connecting flange (12) are sequentially arranged; input assembly installation: pressing in the rolling bearing (14) with the oil seal to a bearing mounting seat (101), inserting the input shaft (5) from one side of the main shell (1) and penetrating through the rolling bearing (14) with the oil seal, then mounting the cylindrical straight gear I (7) to the corresponding position of the input shaft (5), and finally mounting the needle bearing (15) to a needle bearing mounting seat (102) of the main shell; and (5) sub-packaging the side shell assembly: two rolling bearings (6) are respectively installed in corresponding bearing holes on the side shell (2). And (3) final assembly: the input assembly is taken as a foundation, the input assembly is placed stably, the split output assembly is mounted on the front end face (104) of the main shell, the split output assembly is screwed up through the fastening bolt (4), and the mounting flatness of the front shell side end face (301) and the main shell side end face (103) is paid attention to in the mounting process; and then installing a split-charging transmission assembly: one end of a transmission shaft (9) provided with a bevel gear I (10) faces to the main shell (1), the two cylindrical spur gears are completely meshed through rotating the transmission shaft (9) in the assembly process, then the transmission shaft (9) is inserted into a needle bearing (15) on the main shell (1), and meanwhile, the transmission shaft (9) is rotated, so that the two bevel gears are perfectly meshed, and the assembly is smooth; and finally, covering the split-packed side shell assembly, paying attention to the alignment of the input shaft (5) with the transmission shaft (9) and the rolling bearing (6) on the side shell (2), and then screwing the side shell (2) through the fastening bolt (4) to complete the integral assembly of the transmission reversing mechanism.
Working principle:
as shown in fig. 1 to 5, spur gear i (7) and spur gear ii (8) are engaged with each other, and bevel gear i (10) and bevel gear ii (11) are engaged with each other, so that power transmission is completed under the engagement of both gear pairs. In normal operation of the engine, the input shaft (5), namely the engine crankshaft, is driven by the piston to perform high-speed rotation together with the spur gear I (7), and the transmission shaft (9) immediately starts to rotate at a high speed along with the input shaft (5) because the spur gear I (7) is directly meshed with the spur gear II (8). The rotation of the transmission shaft (9) drives the bevel gear I (10) on the transmission shaft (9) to rotate at a high speed, and the bevel gear II (11) arranged on the output shaft (13) is in direct engagement with the bevel gear I (10) on the transmission shaft (9), so that the high-speed rotation of the transmission shaft (9) is transmitted to the output shaft (13) through the engaged bevel gear, namely, the output shaft (13) rotates at a high speed along with the input shaft (5), but due to the characteristic of the bevel gear of the space gear wheel pair, the output shaft (13) synchronously rotates along with the input shaft (5), but turns by 90 degrees in the axial direction, and the change of the power output direction of the engine is completed.
The particular exemplary embodiments of the utility model described above are for purposes of illustration and example, but the utility model is not limited to these embodiments, any substantial modifications or substitutions within the spirit of this example, and still fall within the scope of the utility model as claimed.
Claims (2)
1. The transmission reversing mechanism for the small aeroengine is characterized by comprising a box body, a shaft, a gear pair, a bearing and a fastening bolt; the box body is divided into a main shell (1), side shells (2) and a front shell (3), corresponding bearing mounting seats are designed on each shell, the side shells (2) are mounted on side end faces (103) of the main shell, the front shell (3) is mounted on front end faces (104) of the main shell and fastened by fastening bolts (4) respectively, and mounting space is provided for the other four parts; the shaft is divided into an input shaft (5), a transmission shaft (9) and an output shaft (13); the gear pair is divided into a cylindrical straight gear I (7) and a cylindrical straight gear II (8), and a bevel gear I (10) and a bevel gear II (11); the bearing is provided with a rolling bearing (6), a needle bearing (15) and a rolling bearing (14) with an oil seal; the input shaft (5) is sequentially provided with an oil seal rolling bearing (14), a cylindrical straight gear I (7) and a rolling bearing (6); the two ends of the transmission shaft (9) are provided with a rolling bearing (6) and a needle bearing (15), and a cylindrical spur gear II (8) and a bevel gear I (10) are sequentially arranged in the middle; the middle of the output shaft (13) is provided with a rolling bearing (6) and a rolling bearing (14) with an oil seal, and one end of the output shaft is provided with a bevel gear II (11).
2. The transmission reversing mechanism for a small aeroengine according to claim 1, wherein the main housing (1) is an engine crankcase, and the input shaft (5) is an engine crankshaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321477996.6U CN220082078U (en) | 2023-06-12 | 2023-06-12 | Transmission reversing mechanism for small aeroengine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321477996.6U CN220082078U (en) | 2023-06-12 | 2023-06-12 | Transmission reversing mechanism for small aeroengine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220082078U true CN220082078U (en) | 2023-11-24 |
Family
ID=88821270
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321477996.6U Active CN220082078U (en) | 2023-06-12 | 2023-06-12 | Transmission reversing mechanism for small aeroengine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220082078U (en) |
-
2023
- 2023-06-12 CN CN202321477996.6U patent/CN220082078U/en active Active
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