Aero-engine connecting disc

Abstract

An aero-engine connecting disc is used for connecting a starting gear and a magneto rotor. The connecting disc comprises a sleeve body; a positioning structure and a key connection structure which are used for connecting a crankshaft are arranged in the sleeve body, and a first flange plate and a second flange plate are integrally connected outside the sleeve body; the first flange plate is located in the middle of the sleeve body and used for being connected with a magneto rotor. The second flange plate is located at the outer end of the sleeve body and used for connecting a starting gear. After the connecting disc is arranged, the length of the rear extending end of the crankshaft is shortened, the structure of the rear extending end is simplified, and the manufacturing difficulty and cost of the crankshaft are reduced. When starting gears and magneto rotors of different models are selected, only the structure and the size of the connecting disc need to be changed, the universality of the crankshaft is improved, and the manufacturing cost of an aero-engine is reduced. In addition, according to the connecting disc, the arc-shaped connecting holes are formed in the first flange plate, and the auxiliary holes are formed in the second flange plate, so that the mounting angle of the magnetor rotor can be conveniently and accurately adjusted.

Description

Technical Field

[0001] The utility model relates to the technical field of aviation engines, in particular to an aviation engine connecting disc. Background Art

[0002] A piston aircraft engine primarily consists of a crankshaft, connecting rods, pistons, cylinders, a valve train, and a casing. The main body of the crankshaft is mounted inside the casing, with both ends extending outside. The front end connects to the propeller, while the rear end connects to the magneto rotor and starter gear. The magneto rotor has two functions: to generate electricity in conjunction with the stator and to provide the trigger signal for engine ignition. The starter gear, in conjunction with the starter motor, rotates the crankshaft during startup.

[0003] There are three main problems at present. First, the magneto rotor and starting gear must be installed at the rear extension of the crankshaft, which makes the rear extension longer and more complex in structure, increasing the manufacturing difficulty and cost of the crankshaft; second, during assembly, the trigger block and the induction coil on the magneto rotor have certain installation angle requirements. Due to the obstruction of the starting gear, the installation angle is difficult to adjust, affecting the normal ignition of the engine; third, when selecting different models of starting gears and magneto rotors, the structure and size of the rear extension of the crankshaft need to be changed, which increases the manufacturing cost of the aircraft engine. Utility Model Content

[0004] In order to overcome the deficiencies in the background technology, the present invention discloses an aero-engine connecting plate, the purpose of which is:

[0005] 1. Shorten the length of the rear extension of the crankshaft and simplify the structure of the rear extension to reduce the manufacturing difficulty and cost of the crankshaft;

[0006] 2. It is convenient to adjust the installation angle of the magneto rotor;

[0007] 3. Increase the versatility of crankshafts and reduce the manufacturing cost of aircraft engines.

[0008] Specifically, the present invention adopts the following technical solutions:

[0009] An aircraft engine connecting plate is installed on a crankshaft and is used to connect a starting gear and a magneto rotor; the connecting plate includes a sleeve; a positioning structure and a key connection structure for connecting to the crankshaft are provided within the sleeve, and a first flange and a second flange are integrally connected to the outside of the sleeve; the first flange is located in the middle part of the sleeve and is used to connect to the magneto rotor; the second flange is located at the outer end of the sleeve and is used to connect to the starting gear.

[0010] After implementing the above technical solution, compared with the background technology, the beneficial effects produced are:

[0011] 1. The connecting plate can ensure the coaxiality of the starting gear, magneto rotor and crankshaft. After the connecting plate is set, it not only shortens the length of the rear extension of the crankshaft, but also simplifies the structure of the rear extension, reducing the manufacturing difficulty and cost of the crankshaft;

[0012] 2. Before final assembly, the starting gear and magneto rotor can be pre-installed on the connecting plate, which is beneficial to improving the final assembly efficiency;

[0013] 3. When selecting different types of starting gears and magneto rotors, only the structure and size of the connecting plate need to be changed, thereby improving the versatility of the crankshaft and reducing the manufacturing cost of the aircraft engine.

[0014] To further improve the technical solution, a plurality of connection holes for connecting the magneto rotor are evenly distributed along the circumference on the first flange. The magneto rotor uses the outer circumferential surface of the sleeve as a positioning reference and is connected to the first flange by screws.

[0015] The implementation of the above technical solution has the following beneficial effects: the existing magneto rotor is provided with multiple threaded holes evenly distributed along the circumference, and the first flange is provided with connecting holes, which can be fixed to the first flange by screws. The existing magneto rotor also has positioning holes, which use the outer circumferential surface of the sleeve as a positioning reference, thereby ensuring the coaxiality of the magneto rotor and the connecting plate.

[0016] To further improve the technical solution, the connecting hole is an arc-shaped connecting hole with the axis of the sleeve as the center.

[0017] After implementing the above technical solution, the beneficial effect is that the arc-shaped connecting hole is provided, so that the magnetic motor rotor can be adjusted at a certain angle along the circumferential direction, which is convenient for accurately adjusting the installation angle of the magnetic motor rotor.

[0018] To further improve the technical solution, a process hole corresponding to the connecting hole and used to adjust the installation angle of the magnetic motor rotor is provided on the second flange.

[0019] After implementing the above technical solution, the beneficial effect is that when adjusting the installation angle of the magneto rotor, there is no need to remove the starting gear. It is only necessary to use a tool to pass through the process hole to loosen the screw to adjust the installation angle of the magneto rotor.

[0020] To further improve the technical solution, a plurality of threaded holes for connecting the starting gear are evenly distributed along the circumference on the second flange. The starting gear uses the outer circumferential surface of the sleeve as a positioning reference and is connected to the second flange by screws.

[0021] The implementation of the above technical solution has the following beneficial effects: the existing starting gear is provided with multiple connection holes evenly distributed along the circumference, and threaded holes are provided on the second flange, allowing the starting gear to be fixed to the second flange by screws. The existing starting gear also has a positioning hole, which uses the outer circumferential surface of the sleeve as a positioning reference, thereby ensuring the coaxiality of the starting gear and the connection plate.

[0022] To further improve the technical solution, the key connection structure is a spline.

[0023] After the above technical solution is implemented, the beneficial effect produced is that the spline has the characteristic of multi-angle installation, which can play a primary positioning effect on the installation angle of the magnetic motor rotor.

[0024] To further improve the technical solution, a stepped hole is provided in the sleeve body, and the stepped hole cooperates with the crankshaft to position the connecting disk in the axial and radial directions.

[0025] After implementing the above technical solution, the beneficial effects are: setting the stepped hole can, on the one hand, realize the fixation of the connecting disk on the crankshaft, and on the other hand, ensure the coaxiality of the connecting disk and the crankshaft, thereby ensuring the coaxiality of the crankshaft and the starting gear and the magneto rotor. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Attachment Figure 1 Shown is a schematic diagram of the installation of the connecting plate, starting gear, and magneto rotor on the crankshaft.

[0027] Attachment Figure 2 Shown is an exploded view of the connecting plate with the starting gear and magneto rotor.

[0028] Attachment Figure 3 Shown is a front view of the connection pad.

[0029] Attachment Figure 4 Shown is a right side view of the connection disk.

[0030] Attachment Figure 5 Shown is the attached Figure 3 BB cross-section diagram.

[0031] In the attached figure:

[0032] 10. Connecting plate; 11. Sleeve; 111. Spline; 112. Stepped hole; 12. First flange; 121. Arc-shaped connecting hole; 13. Second flange; 131. Threaded hole; 132. Process hole;

[0033] 20. Magneto rotor; 21. Trigger block;

[0034] 30. Start gear;

[0035] 40. Crankshaft;

[0036] 50. Screws. DETAILED DESCRIPTION

[0037] The following describes preferred embodiments of the present invention with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely intended to illustrate the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. It should be noted that, in the description of the present invention, terms such as "front," "rear," "up," "down," "left," "right," "vertical," "horizontal," "inside," and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is merely for ease of description and does not indicate or imply that the device or component must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. It should also be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can mean fixed, detachable, or integral; mechanical or electrical; direct, indirect through an intermediary, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0038] Refer to the attached Figure 1 and attached Figure 2 . An aircraft engine connecting disk is installed on the crankshaft 40 and is used to connect the starting gear 30 and the magneto rotor 20. The starting gear 30 is disc-shaped, and six connecting holes 121 are provided in the circumference of the starting gear 30, and a positioning hole is provided at the center of the starting gear 30. The magneto rotor 20 is annular, and eight threaded holes 131 are provided in the circumference of the magneto rotor 20, and a positioning hole is provided at the center of the magneto rotor 20. A trigger block 21 is provided on the outer circumferential surface of the magneto rotor 20. During operation, each time the trigger block 21 rotates one circle, the induction coil induces a trigger ignition signal.

[0039] Refer to the attached Figure 3-5 , by the attached Figure 3-5 It can be seen that the connecting plate 10 is a rotating body structure as a whole, which includes a sleeve 11, a first flange 12 and a second flange 13.

[0040] A positioning structure and a key connection structure for connecting to the crankshaft 40 are provided within the sleeve 11. In this embodiment, the positioning structure is a stepped hole 112 provided within the sleeve 11. The stepped hole 112 cooperates with the crankshaft 40 to achieve axial and radial positioning of the connecting disc 10 on the crankshaft 40, ensuring the coaxiality of the connecting disc 10 and the crankshaft 40. The key connection structure is located to the right of the stepped hole 112 and is used to transmit torque, enabling the connecting disc 10 to rotate with the crankshaft 40. In this embodiment, the key connection structure is a spline 111, which has the characteristic of multi-angle installation and can provide a primary positioning effect for the installation angle of the magnetic motor rotor 20.

[0041] The first flange 12 and the second flange 13 are integrally connected to the outer circumferential surface of the sleeve 11. The first flange 12 is located in the middle part of the sleeve 11 and is used to connect the magnetic motor rotor 20; the second flange 13 is located at the outer end (right end) of the sleeve 11 and is used to connect the starting gear 30.

[0042] Specifically, eight connection holes 121 for connecting the magneto rotor 20 are evenly distributed along the circumference of the first flange 12. The positioning holes on the magneto rotor 20 use the outer circumferential surface of the sleeve 11 as a positioning reference. The magneto rotor 20 is connected to the first flange 12 via screws 50, ensuring the coaxiality of the magneto rotor 20 and the connecting plate 10. Six threaded holes 131 are evenly distributed along the circumference of the second flange 13 for connecting the starting gear 30. The positioning holes on the starting gear 30 use the outer circumferential surface of the sleeve 11 as a positioning reference. The magneto rotor 20 is connected to the second flange 13 via screws 50, ensuring the coaxiality of the starting gear 30 and the connecting plate 10. In this way, the coaxiality between the starting gear 30, the magneto rotor 20, and the crankshaft 40 can be ensured through the connecting plate 10.

[0043] By the attached Figure 1 As can be seen, the provision of the connecting disc 10 not only shortens the length of the rear extension of the crankshaft 40 but also simplifies its structure, reducing the manufacturing difficulty and cost of the crankshaft 40. Prior to final assembly, the starter gear 30 and magneto rotor 20 can be pre-installed on the connecting disc 10, which helps improve assembly efficiency. Furthermore, when selecting different models of starter gear 30 and magneto rotor 20, only the structure and dimensions of the connecting disc 10 need to be modified, without modifying the crankshaft 40. This improves the versatility of the crankshaft and reduces the manufacturing cost of the aircraft engine.

[0044] Refer to the attached Figure 5 To facilitate adjustment of the installation angle of the magneto rotor 20 on the connection plate 10, the connection hole 121 is an arc-shaped connection hole centered on the axis of the sleeve 11. The provision of the arc-shaped connection hole 121 allows the magneto rotor 20 to have a certain degree of circumferential adjustability, facilitating precise adjustment of the installation angle of the magneto rotor 20.

[0045] Refer to the attached Figure 4 Furthermore, the second flange 13 is provided with process holes 132 corresponding to the eight arc-shaped connection holes 121 for adjusting the installation angle of the magneto rotor 20. The process holes 132 have a relatively large diameter, so when adjusting the installation angle of the magneto rotor 20, there is no need to remove the starting gear 30. Instead, a tool is inserted through the process holes 132 to loosen the screws 50, allowing the magneto rotor 20 to be adjusted.

[0046] Parts not described in detail are prior art. Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An aircraft engine connecting plate, mounted on a crankshaft, for connecting a starting gear and a magneto rotor, characterized by: The connecting plate includes a sleeve body; a positioning structure and a key connection structure for connecting the crankshaft are provided in the sleeve body, and a first flange and a second flange are integrally connected to the outside of the sleeve body; the first flange is located in the middle part of the sleeve body and is used to connect the magnetic motor rotor; the second flange is located at the outer end of the sleeve body and is used to connect the starting gear.

2. An aircraft engine connection plate according to claim 1, characterized in that: The first flange is provided with a plurality of connection holes for connecting the magneto rotor evenly distributed along the circumferential direction. The magneto rotor is connected to the first flange by screws with the outer circumferential surface of the sleeve as the positioning reference.

3. The aircraft engine connection plate according to claim 2, characterized in that: The connecting hole is an arc-shaped connecting hole with the axis of the sleeve as the center.

4. An aircraft engine connection plate according to claim 2 or 3, characterized in that: A process hole corresponding to the connecting hole and used for adjusting the installation angle of the magnetic motor rotor is provided on the second flange.

5. The aircraft engine connection plate according to claim 1, wherein: The second flange is provided with a plurality of threaded holes for connecting the starting gear evenly distributed along the circumference. The starting gear is positioned on the outer circumference of the sleeve and is connected to the second flange by screws.

6. The aircraft engine connection plate according to claim 1, characterized in that: The key connection structure is a spline.

7. The aircraft engine connection plate according to claim 1, characterized in that: A stepped hole is provided in the sleeve body, and the stepped hole cooperates with the crankshaft to position the connecting disc in the axial and radial directions.

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