A lubrication structure and a reducer having the same

Abstract

The present invention relates to the field of lubrication technology, and more specifically to a lubrication structure and a reducer incorporating the same. The lubrication structure comprises a trough having an inlet and an outlet disposed opposite each other, the width of the trough gradually decreasing from the inlet to the outlet; and a nozzle disposed at the outlet. The present invention provides a lubrication structure and a reducer incorporating the same, which are simple in structure, compact in size, and lightweight.

Description

Technical Field

[0001] The present invention relates to the field of lubrication technology, and in particular to a lubrication structure and a reducer having the same. Background Art

[0002] The lubrication system is a crucial component of the reducer. Its function is to supply oil to all friction pairs—gears, bearings, and spline connections—to reduce friction and effectively cool parts, preventing wear and gluing failures and ensuring the proper functioning of the transmission system. Due to its complex and compact structure, helicopter main reducers typically use pressure lubrication to lubricate moving pairs such as bearings and gears. This method requires lubrication system accessories such as an oil pump, oil filter, pressure regulating valve, and pressure sensor. Furthermore, numerous oil lines must be cast into the casing, significantly increasing the weight, volume, and manufacturing cost of the main reducer. Summary of the Invention

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the defects of the helicopter main reducer in the prior art, such as the complex lubrication structure, large volume and weight, thereby providing a lubrication structure with a simple structure, small volume and light weight and a reducer having the same.

[0004] In order to solve the above technical problems, the present invention provides a lubricating structure, comprising:

[0005] The trough body has an inlet and an outlet arranged opposite to each other, and the width of the trough body gradually decreases from the inlet to the outlet;

[0006] A nozzle is arranged at the outlet.

[0007] Optionally, the inlet and outlet are respectively provided with a first mounting member and a second mounting member.

[0008] Optionally, the diameter of the nozzle is smaller than the width of the outlet.

[0009] A reducer is also provided, comprising the lubrication structure, wherein the inlet of the trough body is mounted on the casing of the reducer, the outlet of the trough body is mounted on the mounting seat of the driving bevel gear of the reducer, and the inlet is arranged lower than the outlet.

[0010] Optionally, it further includes an oil reservoir and a driven bevel gear, the driven bevel gear is meshedly connected to the driving bevel gear, and the driven bevel gear is at least partially arranged in the oil reservoir, the inlet of the trough body is arranged close to the edge of the driven bevel gear, and when the driven bevel gear rotates driven by the driving bevel gear, the lubricating oil in the oil reservoir is stirred by the driven bevel gear and flows into the part to be lubricated through the inlet of the trough body.

[0011] Optionally, a shaft is further included, the driving bevel gear is mounted on the shaft, the shaft has a shaft cavity, and the nozzle is arranged corresponding to the shaft cavity.

[0012] Optionally, the shaft is further provided with an oil-swinging hole, through which the lubricating oil flows into the part to be lubricated.

[0013] Optionally, the parts to be lubricated include a clutch bearing, a clutch and a driving bevel gear bearing which are sequentially mounted on the shaft.

[0014] Optionally, the driving bevel gear bearing includes a first bearing and a second bearing respectively arranged at two axial ends of the driving bevel gear.

[0015] The technical solution of the present invention has the following advantages:

[0016] 1. The lubrication structure provided by the present invention comprises only two parts, a trough body and a nozzle. The overall structure is simple, the volume is small, and the weight is light. The width of the trough body gradually decreases from the inlet to the outlet, so that the flow rate of the lubricating oil is relatively high when it reaches the nozzle, and the lubricating oil can smoothly enter the part to be lubricated.

[0017] 2. In the reducer provided by the present invention, the inlet of the trough is mounted on the reducer's casing, and the outlet is mounted on the mounting seat of the reducer's driving bevel gear, i.e., the inlet is positioned lower than the outlet. As the driven bevel gear rotates, driven by the driving bevel gear, the lubricating oil in the oil reservoir is stirred by the driven bevel gear and flows through the inlet of the trough to the area to be lubricated. This achieves pressure-free lubrication from a low point to a high point, minimizing kinetic energy loss, achieving a faster flow rate, and increasing the amount of flow.

[0018] 3. In the reducer provided by the present invention, the lubricating oil flows into the parts to be lubricated in sequence through the oil-swinging holes on the shaft and then returns to the oil storage tank, thus realizing the circulation of the lubricating oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 A schematic diagram of the lubrication structure provided by the present invention;

[0021] Figure 2 A schematic diagram of a reducer provided by the present invention;

[0022] Figure 3 This is a top view of the reducer provided by the present invention.

[0023] Description of reference numerals:

[0024] 1. Tank body; 2. First mounting part; 3. Second mounting part; 4. Nozzle; 5. Casing; 6. Driven bevel gear; 7. Driving bevel gear; 8. Oil reservoir; 9. Clutch; 10. First bearing; 11. Second bearing; 12. Clutch bearing; 13. Shaft cavity; 14. Oil-slinging hole. DETAILED DESCRIPTION

[0025] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0026] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0027] like Figure 1 A specific embodiment of the lubrication structure shown includes a trough body 1 having an inlet and an outlet relatively arranged, the trough body 1 is arc-shaped, and the width of the trough body 1 gradually decreases from the inlet to the outlet. A first mounting member 2 and a second mounting member 3 are respectively provided at the inlet and the outlet. Specifically, the first mounting member 2 is a flange, which is arranged at an angle to the inlet and is provided with a mounting hole; the second mounting member 3 is a mounting plate, which is partially fitted with the trough body 1 and is also provided with a mounting hole, through which bolts pass to fix the trough body 1 to the reducer. A nozzle 4 is provided at the outlet of the trough body 1, and the diameter of the nozzle 4 is smaller than the width of the outlet to further increase the speed of the lubricating oil spraying; and the inlet is set lower than the outlet to facilitate installation and fixation at different positions of the reducer.

[0028] like Figure 2 and 3 A specific embodiment of the speed reducer shown is used in a helicopter and includes the lubrication structure described above. The inlet of the trough body 1 is mounted on the speed reducer casing 5 and is located above the driven bevel gear 6. The outlet of the trough body 1 is mounted on the mounting seat of the speed reducer's driving bevel gear 7. Because the highest point of the driven bevel gear 6 is lower than the axis of the driving bevel gear 7, the inlet of the trough body 1 is arranged lower than the outlet.

[0029] An oil reservoir 8, a driven bevel gear 6, a driving bevel gear 7 and a shaft are provided inside the casing 5 of the reducer, and a mounting seat, a driving bevel gear 7 and a clutch 9 are installed on the shaft in sequence. The driving bevel gear 7 is mounted on the shaft through a driving bevel gear bearing, and the driving bevel gear bearing includes a first bearing 10 and a second bearing 11 respectively arranged at both axial ends of the driving bevel gear. The clutch 9 is mounted on the shaft through a clutch bearing 12. The shaft has an axial cavity 13 and an oil-slinging hole 14, and the nozzle 4 is arranged corresponding to the axial cavity 13, and the oil-slinging hole 14 is arranged at the end of the shaft away from the driven bevel gear 6. The driven bevel gear 6 is meshedly connected with the driving bevel gear 7, and the driven bevel gear 6 is at least partially arranged in the oil reservoir 8 to contact the lubricating oil in the oil reservoir 8. The inlet of the tank body 1 is arranged close to the edge of the driven bevel gear 6. When the driven bevel gear 6 rotates driven by the driving bevel gear 7, the lubricating oil in the oil reservoir 8 is stirred by the driven bevel gear 6, flows into the shaft cavity 13 through the inlet of the tank body 1, and then flows into the clutch bearing 12, the clutch 9 and the driving bevel gear bearing waiting for lubrication through the oil-slinging hole 14. Figure 2 and Figure 3 Indicated by the arrow direction.

[0030] When the reducer begins operating, the driving bevel gear 7 rotates the driven bevel gear 6, stirring the oil in the oil reservoir 8 in a circular motion. This oil contacts and collides with the upper portion of the casing 5 and flows downward. When the oil reaches the inlet of the trough 1, it enters the trough 1 at a certain speed (generally greater than 5 m / s). Guided by the trough 1, it overcomes gravity and flows to the axis of the driving bevel gear 7. Because the cross-section of the trough 1 is a trumpet-shaped, tightening shape along the direction of the oil flow, and the cross-section at the nozzle 4 is further contracted than the trough 1, the oil flow rate is increased. Finally, the oil is sprayed at a high speed into the shaft cavity 13 of the driving bevel gear 7. The spray distance can be adjusted according to the location of the lubrication point by adjusting the lubrication structure. The oil entering the shaft cavity 13 is ejected through the oil ejection hole 14 under the action of the centrifugal force of the rotation, and lubricates the clutch bearing 12, clutch 9, and the driving bevel gear bearing in sequence. Finally, it returns to the oil reservoir 8 by gravity for the next cycle.

[0031] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A reducer, characterized in that: A lubrication structure is included, wherein the lubrication structure includes: The trough body (1) is cylindrical and has an inlet and an outlet arranged opposite to each other, and the width of the trough body (1) gradually decreases from the inlet to the outlet; a nozzle (4), disposed at the outlet; The inlet of the trough body (1) is mounted on the casing (5) of the reducer, the outlet of the trough body (1) is mounted on the mounting seat of the driving bevel gear (7) of the reducer, and the inlet is arranged lower than the outlet. The diameter of the nozzle (4) is smaller than the width of the outlet. The trough body (1) further comprises an oil reservoir (8) and a driven bevel gear (6). The driven bevel gear (6) is meshedly connected with the driving bevel gear (7), and the driven bevel gear (6) is at least partially arranged in the oil reservoir (8). The inlet of the trough body (1) is arranged close to the edge of the driven bevel gear (6). When the driven bevel gear (6) rotates driven by the driving bevel gear (7), the lubricating oil in the oil reservoir (8) is stirred by the driven bevel gear (6) and flows into the part to be lubricated through the inlet of the trough body (1).

2. The reducer according to claim 1, characterized in that The inlet and outlet are respectively provided with a first mounting member (2) and a second mounting member (3).

3. The reducer according to claim 1, characterized in that It also includes a shaft, the active bevel gear (7) is mounted on the shaft, the shaft has a shaft cavity (13), and the nozzle (4) is arranged corresponding to the shaft cavity (13).

4. The reducer according to claim 3, characterized in that The shaft is also provided with an oil-swinging hole (14), through which the lubricating oil flows into the part to be lubricated.

5. The reducer according to claim 4, characterized in that: The parts to be lubricated include a clutch bearing (12), a clutch (9) and a driving bevel gear bearing which are sequentially mounted on the shaft.

6. The reducer according to claim 5, characterized in that: The driving bevel gear bearing comprises a first bearing (10) and a second bearing (11) respectively arranged at two axial ends of the driving bevel gear.

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