Transmission device

Abstract

The transmission device comprises a machine shell, an input shaft, an edge covering lining and a cover plate, a containing hole is formed in the machine shell, the input shaft is sleeved with a thrust sleeve and a plurality of bearings, the thrust sleeve is arranged between outer rings of every two adjacent bearings, the thrust sleeve and the bearings are both arranged in the edge covering lining in a sleeved mode, the cover plate is fixedly connected to the edge of an opening of the containing hole, and the cover plate is fixedly connected to the edge of the opening of the containing hole. The cover plate is further attached to at least one edge covering lining, the bearing is contained in the containing hole, and the edge covering lining is clamped and plugged between the outer ring of the bearing and the inner wall face of the containing hole. By adopting the technical scheme provided by the invention, the thrust sleeve is used for axially limiting the two adjacent bearings, and the thrust sleeve and the bearings are also sleeved in the edge-covered bushing, so that the edge-covered bushing, the bearings, the thrust sleeve and the input shaft are connected into a larger integral part, and when the integral part is arranged in a shell, the bearings do not need to be assembled one by one, and the assembly efficiency is greatly improved. The assembly process of the transmission device is simplified, time and labor are saved, and assembly errors are reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of aviation engines, and in particular relates to a transmission device. Background Art

[0002] Existing transmission devices generally include a wheel axle, a transmission wheel and a bearing. The bearing is arranged between the outer circumference of the wheel axle and the transmission wheel. The bearing provides support and transmits power for the wheel axle. The transmission wheel is used to output the power from the wheel axle. Bearing support lubrication is an important structure of aircraft engines. Good bearing support lubrication can not only reduce vibration and lubricate, but also regulate the critical speed of the engine, prevent catastrophic accidents caused by excessive engine vibration, and increase the service life of the engine.

[0003] For example, the patent document with publication number "CN118959455A" discloses a shock-absorbing and lubricating structure for an aircraft engine rotor bearing, which includes a bearing mounting seat, a shaft neck and a bearing, wherein the outer ring of the bearing is mounted in the bearing mounting seat; the inner ring of the bearing is sleeved on the shaft neck; a shock absorber ring is arranged between the outer ring of the bearing and the bearing mounting seat; a plurality of inner protrusions are evenly distributed on the inner wall surface of the shock absorber ring; the depression between two adjacent inner protrusions forms an inner oil film cavity; a plurality of outer protrusions are evenly distributed on the outer peripheral surface of the shock absorber ring; the depression between two adjacent outer protrusions forms an outer oil film cavity; and lubricating oil is arranged in the inner oil film cavity and the outer oil film cavity. With this patent and technical solution, when the rotor is working, the lubricating oil of the bearing enters the inner and outer oil film cavities of the shock absorber ring to form an oil film, which provides oil film damping for the rotor bearing and consumes the energy of vibration, thus having better vibration reduction and lubrication effects. With this patented technical solution, the lubricating oil needs to enter the bearing through the inner ring of the bearing to lubricate the bearing. Most of the existing bearings are standard parts, and the hardness of the inner and outer rings of the bearings is extremely high. After the bearings are prepared and formed, there are no reserved holes in the inner and outer rings. It is difficult to re-cut the surfaces of the inner and outer rings of the bearings, and after the holes are set in the inner ring of the bearings, it will also affect the overall service life of the bearings. In addition, the transmission device has a complex structure and many various parts. The existing transmission shaft support structure is heavy and often includes multiple bearings. When assembling the transmission device, each bearing needs to be assembled in the casing one by one, which is not only time-consuming and labor-intensive, but also causes the problem of excessive assembly errors. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides a transmission device.

[0005] The present invention provides a transmission device, including a casing, an input shaft, a rimmed bushing and a cover plate. A accommodating hole is provided in the casing, a thrust sleeve and multiple bearings are sleeved on the input shaft, the thrust sleeve is arranged between the outer rings of two adjacent bearings, and the thrust sleeve and the bearings are both sleeved in the rimmed bushing, the cover plate is fixedly connected to the edge of the opening of the accommodating hole, the cover plate is also abutted against at least one rimmed bushing, and the bearing is accommodated in the accommodating hole, and the rimmed bushing is clamped between the outer ring of the bearing and the inner wall surface of the accommodating hole.

[0006] An oil injection channel and an oil return channel are provided in the casing, an oil unloading hole is provided on the surface of the edging bushing, and an oil injection channel is provided in the thrust sleeve. One end of the oil injection channel is provided at the edge of the orifice of the accommodating hole, and the other end of the oil injection channel, the oil unloading hole and the oil injection channel are connected in sequence, and the two ends of the oil injection channel are respectively aligned with one side of the bearing, one end of the oil return channel is aligned with the other side of the bearing, and the other end of the oil return channel is provided at the edge of the orifice of the accommodating hole.

[0007] An adjusting washer is also sleeved on the input shaft and clamped between the thrust sleeve and the bearing.

[0008] The input shaft is also threadedly connected to a locking nut, and a locking washer is sandwiched between the locking nut and one of the bearings.

[0009] The surface of the input shaft is further provided with a rotation-stopping groove, and at least a portion of the locking washer extends into the rotation-stopping groove.

[0010] The surface of the input shaft is further provided with a shaft shoulder, which abuts against the inner ring of at least one of the bearings.

[0011] The bearing is a deep groove ball bearing or a cylindrical roller bearing.

[0012] The input shaft has a central through hole, the inner wall of which is provided with a spline groove and a stop groove. The spline groove and the stop groove are interconnected, and the length direction of the spline groove is consistent with the axial direction of the input shaft. The stop groove is in the shape of a closed circular ring.

[0013] The transmission device also includes an output shaft, one end of which is fixedly connected to the transmission wheel, and the other end of the output shaft is sleeved in the central through hole. The output shaft and the input shaft are also fixedly connected together using a pin, and the length direction of the pin is perpendicular to the axial direction of the input shaft.

[0014] The transmission wheel is a gear.

[0015] The beneficial effects of the present invention are: by adopting the technical solution provided by the present invention, since a thrust sleeve and an edge bushing are provided, the thrust sleeve is used to axially limit two adjacent bearings, so that the bearings can be accurately installed in the corresponding positions on the input shaft, and the thrust sleeve and the bearing are also set in the edge bushing, so that the edge bushing, the bearing, the thrust sleeve and the input shaft are connected into a larger integral component. When it is installed into the casing, there is no need to assemble each bearing one by one, which simplifies the assembly process of the transmission device, saves time and effort, and reduces assembly errors. In addition, a lubricating oil circulation flow channel is also provided in the transmission device, so that the lubricating oil is sent into the bearing through the oil injection flow channel inside the thrust sleeve, and there is no need to cut the bearing, which improves the bearing lubrication effect and prevents the bearing from being damaged by cutting, so that the mechanical properties of the bearing remain perfect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front view of the present invention;

[0017] Figure 2 is an axonometric view of the housing of the present invention;

[0018] Figure 3 is an axonometric view of the input shaft of the present invention;

[0019] Figure 4 It is an axonometric view of the edge-wrapped bushing of the present invention;

[0020] Figure 5 It is an axonometric view of the thrust sleeve of the present invention;

[0021] Figure 6 It is a structural schematic diagram of the end face of the casing of the present invention.

[0022] In the figure: 1- housing, 2- input shaft, 3- edge bushing, 4- cover plate, 5- accommodating hole, 6- thrust sleeve, 7- bearing, 8- oil injection channel, 9- oil return channel, 10- oil unloading hole, 11- oil injection channel, 12- adjusting washer, 13- locking nut, 14- locking washer, 15- anti-rotation groove, 16- shaft shoulder, 17- center through hole, 18- spline groove, 19- anti-slip groove, 20- output shaft, 21- transmission wheel, 22- pin rod. DETAILED DESCRIPTION

[0023] The technical solution of the present invention is further described below with reference to the accompanying drawings, but the scope of protection claimed is not limited to the above;

[0024] The present invention provides a transmission device, such as Figures 1 to 6As shown, it includes a casing 1, an input shaft 2, a edging bushing 3 and a cover plate 4. A accommodating hole 5 is provided in the casing 1. A thrust sleeve 6 and multiple bearings 7 are sleeved on the input shaft 2. The thrust sleeve 6 is arranged between the outer rings of two adjacent bearings 7, and the thrust sleeve 6 and the bearings 7 are both sleeved in the edging bushing 3. The cover plate 4 is fixed to the edge of the opening of the accommodating hole 5. The cover plate 4 is also in contact with at least one edging bushing 3, and the bearing 7 is accommodated in the accommodating hole 5. The edging bushing 3 is clamped between the outer ring of the bearing 7 and the inner wall surface of the accommodating hole 5.

[0025] By adopting the technical solution provided by the present invention, a thrust sleeve and an edge bushing are provided, the thrust sleeve is used to axially limit two adjacent bearings, so that the bearings can be accurately installed in the corresponding positions on the input shaft, and the thrust sleeve and the bearing are also set in the edge bushing, so that the edge bushing, the bearing, the thrust sleeve and the input shaft are connected into a larger integral component. When it is installed into the casing, there is no need to assemble each bearing one by one, which simplifies the assembly process of the transmission device, saves time and effort, and reduces assembly errors. In addition, a lubricating oil circulation flow channel is also provided in the transmission device, so that the lubricating oil is sent into the bearing through the oil injection flow channel inside the thrust sleeve, and there is no need to cut the bearing, which improves the bearing lubrication effect and prevents the bearing from being damaged by cutting, so that the mechanical properties of the bearing remain perfect.

[0026] Specifically, an oil injection channel 8 and an oil return channel 9 are provided in the casing 1, an oil unloading hole 10 is provided on the surface of the edging bushing 3, and an oil injection channel 11 is provided in the thrust sleeve 6. One end of the oil injection channel 8 is arranged at the edge of the orifice of the accommodating hole 5, and the other end of the oil injection channel 8, the oil unloading hole 10 and the oil injection channel 11 are connected in sequence, and the two ends of the oil injection channel 11 are respectively aligned with one side of the bearing 7, one end of the oil return channel 9 is aligned with the other side of the bearing 7, and the other end of the oil return channel 9 is arranged at the edge of the orifice of the accommodating hole 5.

[0027] In addition, an adjusting washer 12 is sleeved on the input shaft 2 and sandwiched between the thrust sleeve 6 and the bearing 7. The adjusting washer 12 is used to compensate for and adjust the distance between two adjacent bearings 7, so that the bearings are correctly positioned axially on the input shaft 2.

[0028] Furthermore, the input shaft 2 is threadedly connected to a lock nut 13, with a lock washer 14 sandwiched between the lock nut 13 and one of the bearings 7. A countersunk groove 15 is also provided on the surface of the input shaft 2, into which at least a portion of the lock washer 14 extends. The lock washer 14 is shaped like a Z, formed by two bends. The countersunk groove 15 prevents the lock washer 14 from rotating around the input shaft 2 and secures the bearing to the input shaft 7.

[0029] Specifically, the surface of the input shaft 2 is further provided with a shoulder 16, which abuts against the inner ring of at least one bearing 7. The shoulder 16 is used to axially position the bearing, and the bearing 7 is preferably a deep groove ball bearing 7 or a cylindrical roller bearing 7.

[0030] Furthermore, the input shaft 2 has a central through-hole 17, the inner wall of which is provided with a spline groove 18 and a anti-slip groove 19. The spline groove 18 and anti-slip groove 19 are interconnected, and the length of the spline groove 18 aligns with the axial direction of the input shaft 2. The anti-slip groove 19 is in the shape of a closed circular ring. With the technical solution of the present invention, when an external power source is connected to the spline groove 18 of the input shaft 2, a corresponding retaining ring can be provided in the anti-slip groove 19 to prevent the external power source from moving axially along the input shaft 2.

[0031] The transmission device also includes an output shaft 20, one end of which is rigidly connected to a transmission wheel 21. The other end of the output shaft 20 is sleeved within the central through hole 17. The output shaft 20 and the input shaft 2 are also rigidly connected by a pin 22, the length of which is perpendicular to the axial direction of the input shaft 2. Preferably, the transmission wheel 21 is a gear. By adopting the technical solution of the present invention, the input shaft 2 and the output shaft 20 are rigidly connected as one body by providing the pin 22, making the transmission device provided by the present invention suitable for power transmission at speeds exceeding 10,000 r / min.

Claims

1. A transmission device, characterized in that: The invention comprises a housing (1), an input shaft (2), a rim bushing (3) and a cover plate (4); a receiving hole (5) is provided in the housing (1); a thrust sleeve (6) and a plurality of bearings (7) are sleeved on the input shaft (2); the thrust sleeve (6) is arranged between the outer rings of two adjacent bearings (7); and the thrust sleeve (6) and the bearings (7) are both sleeved in the rim bushing (3); the cover plate (4) is fixed to the edge of the opening of the receiving hole (5); the cover plate (4) is also in contact with at least one rim bushing (3) and the bearings (7) are accommodated in the receiving hole (5); the rim bushing (3) is clamped between the outer ring of the bearing (7) and the inner wall surface of the receiving hole (5).

2. A transmission device according to claim 1, characterized in that: An oil injection channel (8) and an oil return channel (9) are provided in the casing (1), an oil discharge hole (10) is provided on the surface of the edging bushing (3), and an oil injection channel (11) is provided in the thrust sleeve (6). One end of the oil injection channel (8) is arranged at the edge of the orifice of the accommodating hole (5), and the other end of the oil injection channel (8), the oil discharge hole (10) and the oil injection channel (11) are connected in sequence, and the two ends of the oil injection channel (11) are respectively aligned with one side of the bearing (7), and one end of the oil return channel (9) is aligned with the other side of the bearing (7), and the other end of the oil return channel (9) is arranged at the edge of the orifice of the accommodating hole (5).

3. A transmission device according to claim 1, characterized in that: An adjusting washer (12) is also sleeved on the input shaft (2), and the adjusting washer (12) is clamped between the thrust sleeve (6) and the bearing (7).

4. A transmission device according to claim 1, characterized in that: The input shaft (2) is also threadedly connected to a locking nut (13), and a locking washer (14) is sandwiched between the locking nut (13) and one of the bearings (7).

5. A transmission device according to claim 4, characterized in that: The surface of the input shaft (2) is also provided with a rotation-stopping groove (15), and at least a portion of the locking washer (14) extends into the rotation-stopping groove (15).

6. A transmission device according to claim 1, 3 or 4, characterized in that: The surface of the input shaft (2) is further provided with a shaft shoulder (16), and the shaft shoulder (16) is in contact with the inner ring of at least one of the bearings (7).

7. A transmission device according to claim 6, characterized in that: The bearing (7) is a deep groove ball bearing (7) or a cylindrical roller bearing (7).

8. A transmission device according to claim 1, characterized in that: The input shaft (2) has a central through hole (17), and the inner wall surface of the central through hole (17) is provided with a spline groove (18) and a anti-slip groove (19). The spline groove (18) and the anti-slip groove (19) are connected to each other, and the length direction of the spline groove (18) is consistent with the axial direction of the input shaft (2). The anti-slip groove (19) is in the shape of a closed circular ring.

9. A transmission device according to claim 8, characterized in that: The transmission device further comprises an output shaft (20), one end of the output shaft (20) being fixedly connected to the transmission wheel (21), the other end of the output shaft (20) being sleeved in the central through hole (17), and the output shaft (20) and the input shaft (2) being fixedly connected together by a pin rod (22), the length direction of the pin rod (22) being perpendicular to the axial direction of the input shaft (2).

10. A transmission device according to claim 9, characterized in that: The transmission wheel (21) is a gear.

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