Hoisting type mounting device of helicopter piston engine

Abstract

The invention relates to the technical field of helicopter power device installation, and discloses a helicopter piston engine hoisting type installation device which comprises a rigid hoisting frame. The vibration isolation assembly comprises an installation support and a plurality of vibration isolation pieces, the installation support is fixedly connected to the piston engine, and the installation support is installed in the rigid lifting frame through the vibration isolation pieces; the connecting assembly comprises a plurality of connecting bases and a plurality of connecting pieces, the connecting bases are fixedly connected to the machine body frame, the connecting pieces are arranged on the outer wall of the rigid lifting frame, the rigid lifting frame is connected with the connecting bases through the connecting pieces, limiting pieces are arranged on the connecting bases, and the connecting pieces are connected with the limiting pieces in a limiting mode; and the mounting seat assembly is arranged on the rigid lifting frame, and the rigid lifting frame is connected with the machine body frame through the mounting seat assembly. The assembly and disassembly efficiency and the operation safety of the engine in a narrow space are improved, rapid and reliable connection and separation are achieved, the structure is compact, the function integration degree is high, and the device is suitable for power installation of light helicopters.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of helicopter power device installation, in particular to a hoisting type installation device of a helicopter piston engine. BACKGROUND

[0002] In the fields of aviation, ships and special vehicles, a piston engine is an important power device, and the performance of the connection and installation system between the piston engine and the body frame (such as an aircraft body, a ship body or a vehicle frame) is crucial. The helicopter piston engine generates a large vibration and noise during operation, and the stability of the installation and the vibration isolation effect are directly related to the flight safety of the helicopter, the ride comfort and the service life of the engine and the body structure. The traditional engine installation method mostly uses a direct rigid connection at the bottom or a simple vibration isolation pad, and has problems such as inconvenient installation and disassembly, limited vibration isolation effect, difficulty in achieving quick and reliable fixation and adjustment in a limited space, etc. Especially for a piston engine that needs to be maintained and inspected conveniently, a device that can effectively isolate vibration and achieve quick, stable installation and disassembly is particularly important.

[0003] Therefore, a hoisting type installation device of a helicopter piston engine is needed to solve the above problems. SUMMARY

[0004] The purpose of the present application is to provide a hoisting type installation device of a helicopter piston engine to solve the problems existing in the prior art.

[0005] To achieve the above purpose, the present application provides the following solutions: the present application provides a hoisting type installation device of a helicopter piston engine, comprising:

[0006] a rigid hoisting frame;

[0007] a vibration isolation assembly comprising a mounting bracket and a plurality of vibration isolation pieces, the mounting bracket being fixedly connected to the piston engine, the plurality of vibration isolation pieces being respectively arranged on the mounting bracket, and the mounting bracket being installed in the rigid hoisting frame through the vibration isolation pieces;

[0008] a connecting assembly comprising a plurality of connecting seats and a plurality of connecting pieces, the connecting seats being fixedly connected to the body frame, the plurality of connecting pieces being respectively arranged on the outer wall of the rigid hoisting frame, the rigid hoisting frame being connected to the connecting seats through the connecting pieces, a limiting piece being arranged on the connecting seat, and the connecting piece being limitingly connected to the limiting piece;

[0009] a mounting seat assembly arranged on the rigid hoisting frame, and the rigid hoisting frame being connected to the body frame through the mounting seat assembly.

[0010] According to the present invention, a hoisting installation device for a helicopter piston engine is provided, wherein the connecting member includes a support column, one end of which is fixedly connected to the outer wall of the rigid hoisting frame, and the other end of which is fixedly connected to a snap-fit ​​connector. A connecting groove is provided on the outer wall of the connecting seat, and an elongated hole is provided on the connecting groove. The connecting groove communicates with the elongated hole, the connecting groove is adapted to the snap-fit ​​connector, and the elongated hole is adapted to the support column.

[0011] According to the present invention, a hoisting installation device for a helicopter piston engine is provided, wherein cavities are provided at both ends of the connecting seat, and the limiting member includes a central shaft rotatably connected in the cavity. Four baffles are fixedly connected at equal intervals along the circumference of the central shaft, one of the baffles extending into the elongated hole. When the support column contacts the baffle, the central shaft is rotated, causing the support column to be engaged at the bottom end of the elongated hole.

[0012] According to the present invention, a hoisting installation device for a helicopter piston engine includes a worm gear and two rotating rods rotatably connected inside a connecting seat. A worm wheel is fixedly connected to each rotating rod, and the worm gear and the worm wheel mesh. One end of each rotating rod is fixedly connected to one end of a threaded rod, and the other end of the threaded rod is threadedly connected to a locking block. The locking block is slidably connected within the cavity and is located between two adjacent baffles. A motor is fixedly connected to the connecting seat, and one end of the worm gear extends out of the connecting seat and is fixedly connected to the output end of the motor.

[0013] According to the present invention, a hoisting installation device for a helicopter piston engine is provided, wherein the vibration isolator is a high-damping elastic vibration isolator, and the mounting bracket is connected to the rigid hoisting frame through the high-damping elastic vibration isolator.

[0014] According to the present invention, a hoisting installation device for a helicopter piston engine is provided, wherein the high-damping elastic vibration isolator is a metal-rubber composite vibration isolator, wherein the high-damping elastic vibration isolator has a metal frame inside and a rubber elastomer outside.

[0015] According to the present invention, a hoisting installation device for a helicopter piston engine is provided, wherein the mounting base assembly includes a mounting support fixedly connected to the fuselage frame, a plurality of mounting seats are fixedly connected to the mounting support, and a plurality of lugs are fixedly connected to the bottom end of the rigid hoisting frame, the lugs being connected to the mounting seats by bolts.

[0016] According to the present invention, a hoisting mounting device for a helicopter piston engine is provided, wherein a buffer pad is provided between the lug and the mounting base.

[0017] According to the present invention, a hoisting installation device for a helicopter piston engine is provided, wherein a first linear module is installed at the front and rear ends of the rigid hoisting frame, a second linear module is installed on the first linear module, a cover is fixedly connected to the second linear module, a sphere is provided inside the cover, one end of a telescopic rod is fixedly connected to the sphere, the other end of the telescopic rod is fixedly connected to the mounting bracket, and an adjusting tube is threadedly connected to the cover.

[0018] According to the present invention, a hoisting installation device for a helicopter piston engine is provided, wherein the connecting seat is provided with an inclined surface, the inclined surface is in contact with the clamping joint; and a plurality of lifting lugs are fixedly connected to the top of the rigid hoisting frame.

[0019] Compared with the prior art, the present invention has the following advantages and technical effects:

[0020] This invention provides a hoisting installation device for a helicopter piston engine. By clearly dividing the device into four functional modules—a rigid hoisting frame, vibration isolation components, connecting components, and mounting base components—it achieves separation and synergy of installation functions: the rigid hoisting frame serves as the main load-bearing skeleton; the vibration isolation components are specifically responsible for engine vibration isolation; the connecting components enable quick connection and locking at the top; and the mounting base components provide auxiliary fixation at the bottom. This invention, through a phased and modular installation method, significantly improves the efficiency and operational safety of engine installation and removal in confined spaces, achieving rapid and reliable connection and separation. The integrated high-damping vibration isolator and fine-tuning mechanism effectively isolate multi-directional vibrations and facilitate precise alignment of the engine and transmission system. The device has a compact structure, high functional integration, and is suitable for power installation on light helicopters. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 For the present invention Figure 1 Enlarged view of a portion of point A in the middle;

[0024] Figure 3 For the present invention Figure 1 Enlarged view of a section at point B in the middle;

[0025] Figure 4 This is a top view of the interior of the connector of the present invention;

[0026] Figure 5 This is a schematic diagram showing the limiting state of the baffle and support column of the present invention;

[0027] The components include: 1. Rigid hoisting frame; 2. Mounting bracket; 3. Piston engine; 4. Connecting seat; 5. Support column; 6. Snap-fit ​​connector; 7. Connecting groove; 8. Long hole; 9. Worm gear; 10. Rotating rod; 11. Worm wheel; 12. Threaded rod; 13. Snap-fit ​​block; 14. Motor; 15. High-damping elastic vibration isolator; 16. Mounting support; 17. Mounting seat; 18. Ear plate; 19. Bolt; 20. Buffer pad; 21. First linear module; 22. Second linear module; 23. Cover; 24. Sphere; 25. Telescopic rod; 26. Adjusting pipe; 27. Lifting lug; 28. Central shaft; 29. ​​Baffle. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] In related technologies, traditional engine mounting schemes typically employ a structure where the engine is rigidly connected to the engine block frame directly via simple rubber damping pads or metal brackets. While this approach is structurally simple, it has significant limitations in terms of vibration isolation effectiveness, multi-directional load adaptability, and ease of installation and maintenance. For example, simple vibration damping components often struggle to effectively attenuate vibrations across a wide frequency range and lack balanced control over dynamic loads and displacements in all directions of the engine; rigid or semi-rigid connections are prone to stress concentration under impact loads, requiring extremely high structural strength at the connection points; furthermore, the monolithic mounting structure usually makes engine hoisting, disassembly, and maintenance cumbersome, requiring specialized tools and being time-consuming. Some improved schemes attempt to introduce independent mounting brackets and a greater number of vibration damping elements to enhance vibration isolation. However, how to efficiently and reliably integrate these vibration damping elements into a rigid support frame, and achieve a connection between this frame and the engine block frame that is both stable and easy to assemble and disassemble, remains a design challenge. Specifically, an ideal installation system needs to achieve a balance of the following objectives: first, to achieve excellent multi-directional vibration suppression through an optimized layout of vibration isolation components; second, to distribute and bear the main static and dynamic loads through a robust rigid main load-bearing structure; and third, to possess a modular, quick-release connection mechanism to facilitate the overall installation, commissioning, and maintenance of the engine. To address the above issues, this application proposes the following technical solution:

[0031] Reference Figures 1-5 The present invention provides a hoisting installation device for a helicopter piston engine, comprising:

[0032] Rigid hoisting frame 1;

[0033] The vibration isolation assembly includes a mounting bracket 2 and multiple vibration isolation components. The mounting bracket 2 is fixedly connected to the piston engine 3, and the multiple vibration isolation components are respectively installed on the mounting bracket 2. The mounting bracket 2 is installed in the rigid lifting frame 1 through the vibration isolation components.

[0034] The connecting assembly includes multiple connecting seats 4 and multiple connecting pieces. The connecting seats 4 are fixedly connected to the machine frame. The multiple connecting pieces are respectively set on the outer wall of the rigid hoisting frame 1. The rigid hoisting frame 1 is connected to the connecting seats 4 through the connecting pieces. The connecting seats 4 are provided with limit pieces, and the connecting pieces are limited to the limit pieces.

[0035] The mounting base assembly is mounted on the rigid lifting frame 1, which is connected to the machine frame via the mounting base assembly.

[0036] In one embodiment of the present invention, the device is clearly divided into four functional modules: a rigid lifting frame 1, a vibration isolation component, a connecting component, and a mounting base component. This achieves separation and coordination of installation functions: the rigid lifting frame serves as the main load-bearing skeleton; the vibration isolation component is specifically responsible for isolating engine vibration; the connecting component enables quick connection and locking at the top; and the mounting base component provides auxiliary fixation at the bottom. This design makes the installation process logically clear, easy to operate and maintain, while ensuring the stability and reliability of the overall structure.

[0037] As an optional implementation, the connector includes a support column 5, one end of which is fixedly connected to the outer wall of the rigid hoisting frame 1, and the other end of which is fixedly connected to a snap-fit ​​connector 6. A connecting groove 7 is provided on the outer wall of the connecting seat 4, and an elongated hole 8 is provided on the connecting groove 7. The connecting groove 7 communicates with the elongated hole 8, the connecting groove 7 is adapted to the snap-fit ​​connector 6, and the elongated hole 8 is adapted to the support column 5.

[0038] In one embodiment of the present invention, the alignment of the snap-fit ​​connector 6 with the connecting groove 7 provides initial guidance, and the sliding of the support column 5 along the elongated hole 8 achieves rapid positioning and initial bearing in the direction of gravity, thereby improving installation efficiency.

[0039] As an optional implementation, the connecting seat 4 has cavities at both ends. The limiting member includes a central shaft 28 rotatably connected in the cavity. Four baffles 29 are fixedly connected at equal intervals along the circumference of the central shaft 28. One of the baffles 29 extends into the elongated hole 8. When the support column 5 contacts the baffle 29, it causes the central shaft 28 to rotate, so that the support column 5 is engaged at the bottom end of the elongated hole 8.

[0040] In one embodiment of the present invention, when the support column 5 slides down to the bottom, its interaction with the baffle 29 will automatically drive the central shaft 28 to rotate, causing the other baffle 29 to rotate to a position that prevents the support column 5 from moving up and out, thus automatically locking it while completing the installation action.

[0041] As an optional implementation, a worm 9 and two rotating rods 10 are rotatably connected inside the connecting seat 4. A worm wheel 11 is fixedly connected to the rotating rod 10, and the worm 9 and the worm wheel 11 mesh. One end of the rotating rod 10 is fixedly connected to one end of a threaded rod 12, and the other end of the threaded rod 12 is threadedly connected to a snap-fit ​​block 13. The snap-fit ​​block 13 is slidably connected in the cavity and is located between two adjacent baffles 29. A motor 14 is fixedly connected to the connecting seat 4, and one end of the worm 9 extends out of the connecting seat 4 and is fixedly connected to the output end of the motor 14.

[0042] In one embodiment of the present invention, the worm gear and threaded pair are driven by the motor 14 to precisely control the insertion of the locking block 13 between the baffles 29, which can completely eliminate the possibility of the central shaft 28 rotating unexpectedly under strong vibration. The worm gear transmission has self-locking properties to ensure a stable locking state.

[0043] As an optional implementation, the vibration isolator is a high-damping elastic vibration isolator 15, and the mounting bracket 2 is connected to the rigid hoisting frame 1 through the high-damping elastic vibration isolator 15.

[0044] In one embodiment of the present invention, a high-damping elastic vibration isolator 15 is used, which can effectively dissipate the medium and high frequency vibration energy generated by the engine operation and significantly reduce the vibration amplitude transmitted to the helicopter fuselage structure.

[0045] As an optional implementation, the high-damping elastic vibration isolator 15 is a metal-rubber composite vibration isolator, with a metal frame inside and a rubber elastomer outside.

[0046] In one embodiment of the invention, the internal metal skeleton provides the necessary structural strength and stiffness to reliably support the engine weight and transmit operational loads; the external rubber elastomer provides excellent elastic deformation capacity and high damping characteristics. This composite structure enables the vibration isolator to maintain good dynamic vibration isolation while bearing large static loads, and it is also compact and has a long service life.

[0047] As an optional implementation, the mounting bracket assembly includes a mounting support 16, which is fixedly connected to the body frame. Multiple mounting seats 17 are fixedly connected to the mounting support 16. Multiple lugs 18 are fixedly connected to the bottom end of the rigid lifting frame 1. The lugs 18 are connected to the mounting seats 17 by bolts 19.

[0048] In one embodiment of the present invention, the bolts 19 are used to facilitate the installation and disassembly of the lugs 18 and the mounting base 17, ensuring stability after installation.

[0049] As an optional implementation, a buffer pad 20 is provided between the ear piece 18 and the mounting base 17.

[0050] In one embodiment of the present invention, the buffer pad 20 can absorb some low-frequency vibrations or instantaneous impacts, further optimizing the vibration transmission path. At the same time, it can prevent direct metal-to-metal contact friction between the lug 18 and the mounting base 17, avoiding abnormal noise or fretting wear, and also facilitates fine adjustment of the mounting gap by adjusting the pad thickness.

[0051] As an optional implementation, a first linear module 21 is installed at the front and rear ends of the rigid hoisting frame 1, a second linear module 22 is installed on the first linear module 21, a cover 23 is fixedly connected to the second linear module 22, a ball 24 is provided inside the cover 23, one end of a telescopic rod 25 is fixedly connected to the ball 24, the other end of the telescopic rod 25 is fixedly connected to the mounting bracket 2, and an adjusting tube 26 is threadedly connected to the cover 23.

[0052] In one embodiment of the present invention, two linear modules can be used to make translational adjustments in two directions in the horizontal plane; the ball joint structure and telescopic rod 25 can be used to adjust the pitch and height directions, which greatly facilitates the centering work in the initial stage of installation and the repositioning after maintenance, eliminating the need for repeated hoisting or the use of heavy pry bars, improving installation accuracy and work efficiency. The adjusting tube 26 is used to lock the ball joint after the adjustment is completed.

[0053] As an optional implementation, the connecting seat 4 is provided with an inclined surface, which is in contact with the snap-fit ​​connector 6; the top of the rigid lifting frame 1 is fixedly connected with multiple lifting lugs 27.

[0054] In one embodiment of the present invention, the inclined surface on the connecting seat 4 serves as a guide, making it easier for the snap-fit ​​connector 6 to slide into the connecting groove 7 when approaching, reducing the alignment accuracy requirements and making installation smoother. The design of the lifting lug 27 facilitates the use of standard lifting equipment such as hoists and cranes to lift and position the entire device.

[0055] In use, the piston engine 3 is first installed into the rigid lifting frame 1 via the mounting bracket 2 and the high-damping elastic vibration isolator 15, forming an engine assembly. Using the lifting lugs 27 and lifting equipment, the assembly is hoisted to the underside of the helicopter fuselage. The snap-fit ​​connector 6 of the connector is aligned and placed into the connecting groove 7 of the connecting seat 4 on the fuselage frame. Then, the assembly is lowered, and the snap-fit ​​connector 6 slides down along the elongated hole 8. The limiting mechanism automatically locks it at the bottom, completing a quick pre-attachment. Subsequently, the operator can easily access the mounting seat assembly and complete the final secure connection with bolts 19. If fine-tuning of the engine alignment is required, the linear module and ball joint mechanism can be operated for adjustment, and then the adjusting tube 26 is locked. Disassembly is performed in reverse order: first, loosen the bolts 19 of the mounting seat assembly, and then drive the unlocking limiting mechanism via the motor 14 to lift the assembly away.

[0056] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0057] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A hoisting installation device for a helicopter piston engine, characterized in that, include: Rigid hoisting frame (1); The vibration isolation assembly includes a mounting bracket (2) and multiple vibration isolation components. The mounting bracket (2) is fixedly connected to the piston engine (3). The multiple vibration isolation components are respectively disposed on the mounting bracket (2). The mounting bracket (2) is installed in the rigid hoisting frame (1) through the vibration isolation components. The connecting assembly includes multiple connecting seats (4) and multiple connecting pieces. The connecting seats (4) are fixedly connected to the machine frame. The multiple connecting pieces are respectively disposed on the outer wall of the rigid hoisting frame (1). The rigid hoisting frame (1) is connected to the connecting seats (4) through the connecting pieces. The connecting seats (4) are provided with limiting pieces. The connecting pieces are limited to the limiting pieces. The mounting base assembly is disposed on the rigid lifting frame (1), which is connected to the body frame via the mounting base assembly.

2. The hoisting installation device for a helicopter piston engine according to claim 1, characterized in that: The connector includes a support column (5), one end of which is fixedly connected to the outer wall of the rigid hoisting frame (1), and the other end of which is fixedly connected to a snap connector (6). A connecting groove (7) is provided on the outer wall of the connecting seat (4), and an elongated hole (8) is provided on the connecting groove (7). The connecting groove (7) communicates with the elongated hole (8), the connecting groove (7) is adapted to the snap connector (6), and the elongated hole (8) is adapted to the support column (5).

3. The hoisting installation device for a helicopter piston engine according to claim 2, characterized in that: The connecting seat (4) has cavities at both ends. The limiting member includes a central shaft (28) rotatably connected in the cavity. Four baffles (29) are fixedly connected at equal intervals along the circumference of the central shaft (28). One of the baffles (29) extends into the elongated hole (8). When the support column (5) contacts the baffle (29), the central shaft (28) is rotated, causing the support column (5) to be engaged at the bottom end of the elongated hole (8).

4. The hoisting installation device for a helicopter piston engine according to claim 3, characterized in that: The connecting seat (4) is rotatably connected to a worm (9) and two rotating rods (10). The rotating rods (10) are fixedly connected to a worm wheel (11). The worm (9) and the worm wheel (11) mesh. One end of the rotating rod (10) is fixedly connected to one end of a threaded rod (12). The other end of the threaded rod (12) is threadedly connected to a snap-fit ​​block (13). The snap-fit ​​block (13) is slidably connected in the cavity. The snap-fit ​​block (13) is located between two adjacent baffles (29). A motor (14) is fixedly connected to the connecting seat (4). One end of the worm (9) extends out of the connecting seat (4) and is fixedly connected to the output end of the motor (14).

5. The hoisting installation device for a helicopter piston engine according to claim 1, characterized in that: The vibration isolation component is a high-damping elastic vibration isolator (15), and the mounting bracket (2) is connected to the rigid hoisting frame (1) through the high-damping elastic vibration isolator (15).

6. The hoisting installation device for a helicopter piston engine according to claim 5, characterized in that: The high-damping elastic vibration isolator (15) is a metal-rubber composite vibration isolator. The high-damping elastic vibration isolator (15) has a metal frame inside and a rubber elastomer outside.

7. The hoisting installation device for a helicopter piston engine according to claim 1, characterized in that: The mounting bracket assembly includes a mounting support (16) which is fixedly connected to the body frame. Multiple mounting seats (17) are fixedly connected to the mounting support (16). Multiple lugs (18) are fixedly connected to the bottom end of the rigid hoisting frame (1). The lugs (18) are connected to the mounting seats (17) by bolts (19).

8. The hoisting installation device for a helicopter piston engine according to claim 7, characterized in that: A buffer pad (20) is provided between the ear piece (18) and the mounting base (17).

9. The hoisting installation device for a helicopter piston engine according to claim 1, characterized in that: The rigid hoisting frame (1) has a first linear module (21) installed at both the front and rear ends. A second linear module (22) is installed on the first linear module (21). A cover (23) is fixedly connected to the second linear module (22). A ball (24) is provided inside the cover (23). One end of a telescopic rod (25) is fixedly connected to the ball (24). The other end of the telescopic rod (25) is fixedly connected to the mounting bracket (2). An adjusting tube (26) is threadedly connected to the cover (23).

10. A hoisting installation device for a helicopter piston engine according to claim 2, characterized in that: The connecting seat (4) is provided with an inclined surface, which is in contact with the snap connector (6); the top of the rigid hoisting frame (1) is fixedly connected with multiple lifting lugs (27).

Images