A transmission case for an aerial range extender

Abstract

The utility model provides an aviation range extender's transmission case, aviation range extender's transmission case includes main casing, auxiliary casing and transmission assembly, main casing is detachably connected with auxiliary casing, and the two enclose inner chamber and are equipped with three bearing seats, transmission assembly is located in the inner chamber and includes a plurality of transmission parts, every transmission part includes two transmission wheel groups and three bearings, is provided with the oil inlet and four main oil outlets on main casing, is equipped with auxiliary oil outlet on auxiliary casing, and the oil inlet is communicated with main oil outlet and auxiliary oil outlet through internal oil channel, so as to provide lubricating oil to bearing and transmission wheel group, wherein, internal oil channel includes five main oil channels and auxiliary oil channel, five main oil channels are all located on main casing, and four main oil channels are communicated one to one with four main oil outlets respectively, auxiliary oil channel is located on auxiliary casing, and communicates another main oil channel with auxiliary oil outlet. The utility model embodiment's aviation range extender's transmission case has low cost and compact structure and the like advantages.

Description

Technical Field

[0001] This utility model relates to the field of range extender transmission box technology, and in particular to a transmission box for an aircraft range extender. Background Technology

[0002] Existing range extender transmission housings have significant shortcomings in structural design and lubrication system integration. Firstly, traditional housings generally employ a one-piece design, resulting in complex internal cavities and numerous curved surfaces. This not only increases machining difficulty and manufacturing costs but also complicates the installation and subsequent maintenance of internal transmission components and bearing housings. Secondly, current lubrication solutions largely rely on external oil pipes for supply. This method tends to result in a cluttered oil circuit layout and significant space occupation, making it difficult to effectively and efficiently lubricate the multi-stage gear meshing areas and multiple high-speed bearings, thus affecting the transmission housing's service life and operational stability. Utility Model Content

[0003] This utility model provides a transmission box for an aircraft range extender, which solves the defects of the transmission box of the aircraft range extender in the prior art, such as complex shell structure and large space occupied by the lubrication system. It simplifies the shell manufacturing process, reduces manufacturing cost, and realizes a high degree of integration of the lubrication system.

[0004] This utility model provides a transmission box for an aircraft range extender, comprising: The main housing and the secondary housing are detachably connected, forming an inner cavity and equipped with three bearing seats; A transmission assembly is disposed in the inner cavity and includes multiple transmission components, each of which includes two transmission wheel sets and three bearings; The main housing is provided with an oil inlet and four main oil outlets, and the secondary housing is provided with a secondary oil outlet. The oil inlet is connected to the main oil outlets and secondary oil outlets through an internal oil passage to provide lubricating oil to the bearings and the transmission wheel assembly. The internal oil passage includes: Five main oil passages are provided on the main housing, and four of the main oil passages are respectively connected to the four main oil outlets. A secondary oil passage is provided on the secondary housing, connecting another primary oil passage to the secondary oil outlet.

[0005] In some embodiments, the transmission assembly includes: The first transmission component includes a first transmission wheel set, a bearing A, and a rotating shaft, wherein the first transmission wheel set is disposed on the rotating shaft; The second transmission component includes a second transmission wheel set, bearing B and bearing C, wherein bearing B and bearing C are arranged opposite to each other and support the second transmission wheel set; The first and second transmission wheel sets mesh to form a primary transmission wheel system.

[0006] In some embodiments, bearing A and bearing B are disposed in the main housing, and bearing C is disposed in the secondary housing; The bearing housing includes bearing housing A, bearing housing B, and bearing housing C, so that they are arranged in a one-to-one correspondence with multiple bearings.

[0007] In some embodiments, the plurality of main oil outlets include: Main oil outlet A is used for jet lubrication of the meshing inlet of the first-stage transmission gear train; Main oil outlet B is used for jet lubrication of the meshing outlet of the first-stage transmission gear train; The main oil outlet C is located in the bearing housing A to spray lubricate the bearing A; The main oil outlet D is located in the bearing housing B to spray lubricate the bearing B.

[0008] In some embodiments, the secondary oil outlet is located in the bearing housing C to spray lubricate the bearing C.

[0009] In some embodiments, the transmission housing of the aircraft range extender further includes an oil pan, which communicates with the inner cavity.

[0010] In some embodiments, each of the main oil outlet and the secondary oil outlet is provided with a damping orifice at its outlet.

[0011] In some embodiments, the main housing and the secondary housing are connected by bolts.

[0012] In some embodiments, a sealing layer is provided on the connection surface between the main housing and the sub-housing.

[0013] In some embodiments, the sub-shell and / or the main shell are provided with reinforcing ribs.

[0014] The aviation range extender transmission box provided in this embodiment adopts a split structure design with a detachable connection between the secondary shell and the main shell. While ensuring the overall structural strength, it significantly improves the problems of high processing difficulty and high manufacturing cost caused by the complex internal cavities and numerous curved surfaces of traditional one-piece shells. Moreover, this split design not only allows the main shell and secondary shell to be manufactured separately using non-casting methods (such as machining), simplifying the production process and reducing production costs, but also effectively avoids the increased wall thickness and structural redundancy caused by tool interference and forming limitations during casting demolding or internal machining of traditional one-piece structures. This is conducive to achieving a lightweight and compact layout of the aviation range extender transmission box.

[0015] In addition, by directly integrating the internal oil passages into the sub-housing or main housing, the lubrication system is embedded, effectively solving the problem of large space occupation caused by external oil pipe layout.

[0016] Therefore, the aviation range extender transmission box of this utility model has the advantages of low manufacturing cost and compact structure. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the transmission box of the aviation range extender provided by this utility model.

[0019] Figure 2 yes Figure 1 A schematic diagram of the cross-sectional structure at point AA.

[0020] Figure 3 This is a schematic diagram of the main housing of the transmission box of the aviation range extender provided by this utility model.

[0021] Figure label: 100. Transmission box for aircraft range extenders; 1. Main shell; 2. Secondary shell; 3. Inner cavity; 4. Bearing housing; 41. Bearing housing A; 42. Bearing housing B; 43. Bearing housing C; 5. Internal oil passages; 6. Oil inlet; 7. Main oil outlet; 71. Main oil outlet A; 72. Main oil outlet B; 73. Main oil outlet C; 74. Main oil outlet D; 8. Secondary oil outlet; 9. Sealing layer; 10. Bolts. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0023] like Figures 1 to 3As shown, the transmission housing 100 of the aircraft range extender according to this embodiment of the present invention includes a main housing 1, a secondary housing 2, and a transmission assembly. The transmission housing 100 of the aircraft range extender is mounted on an aircraft range extender.

[0024] The main housing 1 and the secondary housing 2 are detachably connected, forming an inner cavity 3 and equipped with three bearing seats 4.

[0025] The transmission assembly is located in the inner cavity 3 and includes multiple transmission components, each of which includes two transmission wheel sets and three bearings.

[0026] The main housing 1 is provided with an oil inlet 6 and four main oil outlets 7, and the secondary housing 2 is provided with a secondary oil outlet 8. The oil inlet 6 is connected to the main oil outlets 7 and the secondary oil outlets 8 through the internal oil passage 5, so as to provide lubricating oil to the bearings and transmission wheel assembly. The internal oil passage 5 includes five main oil passages and secondary oil passages.

[0027] All five main oil passages are located on the main housing 1, and four of the main oil passages are connected to the four main oil outlets 7 respectively.

[0028] The auxiliary oil passage is located on the auxiliary housing 2, connecting another main oil passage and the auxiliary oil outlet 8.

[0029] The transmission housing 100 of the aircraft range extender of this utility model embodiment forms an inner cavity 3 with the main housing 1 and the auxiliary housing 2 being detachably connected. Both the main housing 1 and the auxiliary housing 2 are provided with bearing seats 4, integrating the transmission components into the inner cavity 3. Each transmission component includes a transmission part, and each transmission part includes a transmission wheel set and a bearing.

[0030] An oil inlet 6 and multiple main oil outlets 7 are provided on the main housing 1, and multiple auxiliary oil outlets 8 are provided on the auxiliary housing 2. The main oil outlets 7 and auxiliary oil outlets 8 provide lubricating oil to the transmission wheel assembly or bearings, thereby ensuring that the key friction pairs of the bearings and transmission wheel assembly (such as the rolling contact surface of the bearing and the meshing area of ​​the gear) can obtain sufficient and direct lubrication under high-speed operation, which greatly reduces the risk of wear and heat generation and improves the transmission efficiency.

[0031] The oil inlet 6 is connected to the four main oil ports through four main oil passages, which are used to directly deliver lubricating oil to the meshing inlet and outlet of the two transmission wheel sets and the two bearings for spray lubrication.

[0032] Another main oil passage serves as an oil supply channel to the secondary housing 2, and is connected to the secondary oil outlet 8 inside the secondary housing 2. After the lubricating oil enters the secondary housing 2, it flows from the secondary oil outlet 8 to the remaining bearing.

[0033] Existing range extender transmission housings have significant shortcomings in structural design and lubrication system integration. Firstly, traditional housings generally employ a one-piece design, resulting in complex internal cavities and numerous curved surfaces. This not only increases machining difficulty and manufacturing costs but also complicates the installation and subsequent maintenance of internal transmission components and bearing housings. Secondly, current lubrication solutions largely rely on external oil pipes for supply. This method tends to result in a cluttered oil circuit layout and significant space occupation, making it difficult to effectively and efficiently lubricate the multi-stage gear meshing areas and multiple high-speed bearings, thus affecting the transmission housing's service life and operational stability.

[0034] The transmission box 100 of the aircraft range extender provided in this embodiment of the utility model adopts a split structure design in which the secondary shell 2 and the main shell 1 are detachably connected. Under the premise of ensuring the overall structural strength, it improves the problems of high processing difficulty and high manufacturing cost caused by the complex internal cavity and multiple curved surfaces of the traditional integral shell.

[0035] Moreover, this split design not only allows the main shell 1 and the secondary shell 2 to be manufactured separately using non-casting methods (such as machining), simplifying the production process and reducing production costs, but also effectively avoids the increase in wall thickness and structural redundancy caused by factors such as tool interference and limited forming during casting demolding or internal machining of traditional integrated structures. This is conducive to achieving a lightweight and compact layout of the aviation range extender transmission box 100.

[0036] In addition, by directly integrating the internal oil passage 5 into the sub-housing 2 or the main housing 1, the lubrication system is embedded, effectively solving the problem of large space occupation caused by the external oil pipe arrangement.

[0037] Therefore, the aviation range extender transmission box 100 of this utility model embodiment has the advantages of low manufacturing cost and compact structure.

[0038] In some embodiments, the transmission assembly includes: The first transmission component includes a first transmission wheel set, a bearing A, and a rotating shaft, with the first transmission wheel set mounted on the rotating shaft.

[0039] The second transmission component includes a second transmission wheel set, bearing B and bearing C, with bearing B and bearing C arranged opposite to each other and supporting the second transmission wheel set.

[0040] The first and second transmission wheel sets mesh to form a primary transmission wheel system.

[0041] Bearing A is installed in the main housing 1 within the corresponding bearing seat 4 to support the rotation of the first transmission wheel assembly. The first transmission wheel assembly is sleeved on a rotating shaft, one end of which is connected to bearing A, and the other end is connected to an external drive component. Bearing B is located in the main housing 1, and bearing C is located in the secondary housing 2, serving to support the second transmission wheel assembly. The first and second transmission wheel assemblies mesh with each other to form a primary transmission gear train.

[0042] The transmission box 100 of the aircraft range extender in this embodiment of the utility model supports each transmission component through the main housing 1 and the auxiliary housing 2, ensuring the stability of the meshing of the primary transmission gear train and meeting the requirements of the transmission box 100 of the aircraft range extender for transmission accuracy and reliability.

[0043] In some embodiments, bearings A and B are disposed in the main housing 1, and bearing C is disposed in the secondary housing 2.

[0044] The bearing housing 4 includes bearing housing A41, bearing housing B42, and bearing housing C43, so that they can be set one-to-one with multiple bearings.

[0045] Bearing A and bearing B are mounted on the main housing 1 and are supported and positioned by bearing seats A41 and B42 located inside the main housing 1, respectively. Bearing C is mounted on the secondary housing 2 and is supported and positioned by bearing seat C43 located inside the secondary housing 2. Each bearing seat 4 is used to install and fix the corresponding bearing to ensure the coaxiality and stability of the transmission components under high-speed operation.

[0046] Optionally, the coaxiality of bearing housing B42 and bearing housing C43 is required to meet the transmission accuracy and lifespan requirements of the transmission box 100 of the aircraft range extender.

[0047] In some embodiments, the plurality of main oil outlets 7 include main oil outlet A71, main oil outlet B72, main oil outlet C73 and main oil outlet D74.

[0048] The main oil outlet A71 is used for jet lubrication of the meshing inlet of the primary transmission gear train.

[0049] The main oil outlet B72 is used for jet lubrication of the primary transmission gear train meshing outlet.

[0050] The main oil outlet C73 is located in bearing housing A41 to spray lubricate bearing A.

[0051] The main oil outlet D74 is located in bearing housing B42 to spray lubricate bearing B.

[0052] Main oil outlet A71 is used to spray lubricating oil into the meshing inlet of the first-stage transmission gear train, achieving effective lubrication and cooling of the meshing inlet area. Main oil outlet B72 is used to spray lubricating oil into the meshing outlet area of ​​the first-stage transmission gear train, achieving effective lubrication and cooling of the meshing outlet area.

[0053] Main oil outlet C73 is located at bearing housing A41 and is used to spray lubricating oil into bearing A for lubrication. Main oil outlet D74 is located at bearing housing B42 and is used to lubricate bearing B.

[0054] The transmission box 100 of the aviation range extender in this embodiment of the utility model is provided with main oil outlets A71 to D74, which facilitates the lubrication of the primary transmission gear train, bearing A and bearing B.

[0055] In some embodiments, a secondary oil outlet 8 is provided in the bearing housing C43 to spray lubricate the bearing C.

[0056] In some embodiments, the transmission housing 100 of the aircraft range extender also includes an oil pan, which communicates with the inner cavity 3. The lubricating oil in the transmission housing 100 of the aircraft range extender eventually flows into the bottom of the inner cavity 3 and then into the oil pan of the aircraft range extender.

[0057] In other embodiments, four of the five main oil passages are connected to main oil outlets A71 to D74 respectively. The auxiliary oil passage connects the other main oil passage to the auxiliary oil outlet 8.

[0058] The oil inlet 6 is connected to the main oil outlets A71, B72, C73, and D74 through four main oil passages, respectively, to directly deliver lubricating oil to the meshing inlet and outlet of the first-stage transmission gear train, as well as bearings A, B, and C for spray lubrication.

[0059] Another main oil passage serves as an oil supply channel to the secondary housing 2, and is connected to the secondary oil outlet 8 inside the secondary housing 2. After entering the secondary housing 2, the lubricating oil flows from the secondary oil outlet 8 to the bearing housing C43 to lubricate the bearing C.

[0060] The transmission box 100 of the aviation range extender of this utility model has an internal oil passage 5 layout that allows the lubricating oil to be diverted as needed after entering from the oil inlet 6, and accurately distributed to the primary transmission gear train and each bearing, ensuring the effectiveness and stability of the lubrication system at high speeds. At the same time, all the internal oil passages 5 are integrated inside the housing, with a compact structure that does not require external pipeline connections, thus improving space utilization and system reliability.

[0061] In some embodiments, each main oil outlet 7 and auxiliary oil outlet 8 is provided with a damping orifice at its outlet.

[0062] The damping orifice, as a throttling structure, can effectively increase the pressure and flow rate of the lubricating oil during injection, so that the lubricating oil forms a concentrated and stable oil flow that is sprayed into the meshing area of ​​the primary transmission gear train and each bearing. This enhances the cooling and lubrication effect on high-speed rotating components, prevents poor lubrication or oil film rupture caused by insufficient oil pressure, and helps control the flow rate of lubricating oil to avoid waste and ensure the efficient operation of the lubrication system.

[0063] In some embodiments, the main housing 1 and the secondary housing 2 are connected by bolts 10.

[0064] The main housing 1 and the secondary housing 2 are connected by multiple bolts 10. This connection method facilitates the assembly and disassembly of the main housing 1 and the secondary housing 2, and is beneficial for the installation, debugging and subsequent maintenance of the internal transmission components. At the same time, it ensures the structural strength and connection reliability of the main housing 1 and the secondary housing 2.

[0065] In some embodiments, a sealing layer 9 is provided on the connection surface between the main housing 1 and the secondary housing 2.

[0066] The sealing layer 9 is formed by applying sealant to the connecting surface. It can effectively fill the tiny gaps at the connection of the inner main housing 1, prevent lubricating oil from leaking out of the housing, ensure the sealing reliability of the integrated oil passage system, and prevent external contaminants from entering the housing and affecting the normal operation of the transmission components.

[0067] In some embodiments, the sub-shell 2 and / or the main shell 1 are provided with reinforcing ribs.

[0068] The secondary housing 2 or the main housing 1 is provided with reinforcing ribs, or both the secondary housing 2 and the main housing 1 are provided with reinforcing ribs. The reinforcing ribs are located at stress concentration points of the secondary housing 2 or the main housing 1, which can effectively improve the overall structural strength and rigidity of the secondary housing 2 or the main housing 1, enhance its resistance to deformation and load-bearing capacity, thereby ensuring the stability of the housing structure under high engine speed operation conditions and avoiding fatigue damage caused by vibration or excessive load.

[0069] In some embodiments, the main oil outlet C73, the main oil outlet D74, and the auxiliary oil outlet 8 are all located on the corresponding bearing housing 4. Their positions on the bearing housing 4 are not limited to those shown in the figures, and can be arbitrarily arranged along the circumference of the bearing housing 4, except for the lowest point of the bearing housing 4.

[0070] The transmission box 100 of the aviation range extender of this utility model embodiment is applicable to range extender equipment in the aviation field.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A transmission box for an aircraft range extender, characterized in that, include: The main housing (1) and the secondary housing (2) are detachably connected, forming an inner cavity (3) and equipped with three bearing seats (4). The transmission assembly is located in the inner cavity (3) and includes multiple transmission components, each of which includes two transmission wheel sets and three bearings; The main housing (1) is provided with an oil inlet (6) and four main oil outlets (7), and the secondary housing (2) is provided with secondary oil outlets (8). The oil inlet (6) is connected to the main oil outlets (7) and secondary oil outlets (8) through an internal oil passage (5) to provide lubricating oil to the bearing and the transmission wheel assembly. The internal oil passage (5) includes: Five main oil passages are provided on the main housing (1), and four of the main oil passages are respectively connected to the four main oil outlets one by one; A secondary oil passage is provided on the secondary housing (2) and connects another primary oil passage to the secondary oil outlet (8).

2. The transmission case of the aircraft range extender according to claim 1, characterized in that, The transmission assembly includes: The first transmission component includes a first transmission wheel set, a bearing A, and a rotating shaft, wherein the first transmission wheel set is disposed on the rotating shaft; The second transmission component includes a second transmission wheel set, bearing B and bearing C, wherein bearing B and bearing C are arranged opposite to each other and support the second transmission wheel set; The first and second transmission wheel sets mesh to form a primary transmission wheel system.

3. The transmission case of the aircraft range extender according to claim 2, characterized in that, The bearing A and the bearing B are located in the main housing (1), and the bearing C is located in the secondary housing (2). The bearing housing (4) includes bearing housing A (41), bearing housing B (42), and bearing housing C (43) so as to be set in a one-to-one correspondence with the multiple bearings.

4. The transmission case of the aircraft range extender according to claim 3, characterized in that, The plurality of main oil outlets (7) include: Main oil outlet A (71) is used for jet lubrication of the meshing inlet of the first-stage transmission gear train; Main oil outlet B (72) is used for jet lubrication of the meshing outlet of the first-stage transmission gear train; The main oil outlet C (73) is located in the bearing housing A (41) to spray lubricate the bearing A; The main oil outlet D (74) is located in the bearing housing B (42) to spray lubricate the bearing B.

5. The transmission case of the aircraft range extender according to claim 3, characterized in that, The auxiliary oil outlet (8) is located on the bearing housing C (43) to spray lubricate the bearing C.

6. The transmission case of the aircraft range extender according to claim 1, characterized in that, It also includes an oil pan, which is connected to the inner cavity (3).

7. The transmission case of the aircraft range extender according to claim 1, characterized in that, Each of the main oil outlet (7) and the auxiliary oil outlet (8) is provided with a damping hole at its outlet.

8. The transmission case of the aircraft range extender according to claim 1, characterized in that, The main housing (1) and the secondary housing (2) are connected by bolts (10).

9. The transmission case of the aircraft range extender according to claim 1, characterized in that, A sealing layer (9) is provided on the connection surface between the main housing (1) and the sub-housing (2).

10. The transmission case of the aircraft range extender according to claim 1, characterized in that, The sub-shell (2) and / or the main shell (1) are provided with reinforcing ribs.

Images