Special pressing tool device for aero-piston engine valve chamber cover

Abstract

The utility model discloses an aviation piston engine valve chamber cover special pressing tool device relates to aviation piston engine tooling technical field. The aviation piston engine valve chamber cover special pressing tool device, including pressing tool main part and auxiliary clamping mechanism, auxiliary clamping mechanism includes pressing cover plate, turnover clamping plate, connecting assembly, connecting rod, L shape connecting piece and pivot, the number of L shape connecting piece is multiple and all fixedly connected in the bottom four corners of pressing tool main part, and pressing cover plate slidingly connected in the top of pressing tool main part, and turnover clamping plate rotatably connected in the opposite face of two adjacent L shape connecting piece, and pivot fixedly connected in the surface of turnover clamping plate, and through L shape connecting piece and pressing tool main part form firm connection base, and turnover clamping plate realizes flexible rotation with the help of pivot, and the linkage design of cooperation connecting rod and pressing cover plate can realize the quick switching of clamping state, and the operation is convenient and responds quickly.

Description

Technical Field

[0001] This utility model relates to the field of tooling technology for aviation piston engines, and in particular to a special clamping tooling device for valve chamber covers of aviation piston engines. Background Technology

[0002] The valve cover of an aircraft piston engine is an important protective component for the engine valve chamber. It is usually installed on top of the valve chamber, covering the relevant components inside the valve chamber and sealing it to prevent oil leakage. It also blocks external dust and impurities from entering the valve chamber, protecting internal components from contamination and damage. It also creates a relatively stable working environment inside the valve chamber, reducing interference from external factors on the valve chamber's operating status. Some valve covers also integrate auxiliary functions, such as providing a channel for oil return or providing a mounting base for related pipelines and sensors. During the operation of an aircraft piston engine, it plays a vital role in ensuring the normal operation and overall reliability of the engine valve system.

[0003] In the assembly process of valve cover for aero-piston engines, the clamping method generally uses a single bolt or simple clamps. These methods have problems such as insufficient clamping stability, cumbersome operation steps, and difficulty in achieving precise positioning of the valve cover during assembly. Uneven clamping force can easily lead to poor fit between the valve cover and cylinder head, affecting the sealing effect of anaerobic adhesive. This cannot meet the technical requirements of high-precision assembly of aero-engines and causes inconvenience to subsequent pressing operations. Therefore, a special pressing tooling device for valve cover of aero-piston engines is needed. Utility Model Content

[0004] The purpose of this utility model is to solve at least one of the technical problems existing in the prior art, and to provide a special clamping tooling device for valve cover of aviation piston engine. It can solve the problems of insufficient clamping stability, cumbersome operation and difficulty in precise positioning in traditional clamping methods, which lead to poor fit between valve cover and cylinder head, easy surface damage, and affect the sealing effect of anaerobic adhesive, thus failing to meet the high-precision assembly requirements of aviation engine.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a special clamping fixture for valve chamber covers of aviation piston engines, comprising a clamping fixture body and an auxiliary clamping mechanism. The auxiliary clamping mechanism includes a clamping cover plate, a flipping clamping plate, a connecting assembly, a connecting rod, an L-shaped connector, and a rotating shaft. Multiple L-shaped connectors are fixedly connected to the four bottom corners of the clamping fixture body. The clamping cover plate is slidably connected to the top of the clamping fixture body. The flipping clamping plate is rotatably connected to the opposite surfaces of two adjacent L-shaped connectors. The rotating shaft is fixedly connected to the surface of the flipping clamping plate and rotatably connected to the L-shaped connectors. The flipping clamping plate is rotatably connected to the L-shaped connectors via the rotating shaft. The connecting assembly is fixedly connected to the surface of the flipping clamping plate. The connecting rod is rotatably connected to the surface of the connecting assembly, and the end of the connecting rod near the clamping cover plate is rotatably connected to the clamping cover plate.

[0006] Preferably, guide rods are fixedly connected to the four bottom corners of the pressing cover plate, and springs are fixedly connected to the four bottom corners of the pressing fixture body. The bottom of each spring is fixedly connected to the guide rod, and the pressing cover plate is slidably connected to the pressing fixture body through the guide rods.

[0007] Preferably, the surface of the flip-over clamp is fixedly connected with multiple rubber pads, and the top of the pressing cover is fixedly connected with a pull handle.

[0008] Preferably, the bottom of the clamping fixture body is fixedly connected to multiple telescopic rods, and the bottom of the telescopic rods is fixedly connected to a clamping frame.

[0009] Preferably, the bottom of the clamping frame is fixedly connected to a plurality of clamping blocks, and the bottom of the clamping blocks is fixedly connected to a plurality of insert rods.

[0010] Preferably, a connecting plate is fixedly connected to the top of the clamping frame, and a threaded rod is rotatably connected inside the clamping fixture body, with the connecting plate threadedly sleeved on the outer surface of the threaded rod.

[0011] Preferably, a rotating handle is fixedly connected to the top of the threaded rod.

[0012] Preferably, the clamping frame is located between two flip clamps.

[0013] Compared with the prior art, the beneficial effects of this utility model are: 1. This dedicated clamping fixture for valve cover of aero-piston engines forms a stable connection with the main body of the clamping fixture through an L-shaped connector. The flipping clamping plate can rotate flexibly with the help of a rotating shaft. With the linkage design of the connecting rod and the clamping cover plate, it can achieve rapid switching of clamping state. It is convenient to operate and responds quickly. The combination of guide rod and spring can provide stable elastic force for the reset of the clamping cover plate, ensuring accurate reset of the flipping clamping plate and avoiding manual reset deviation. The rubber pad can effectively avoid rigid contact damage to the cylinder head inner groove during clamping, while enhancing the clamping friction and improving the stability of the initial fixation. The synergistic effect of the various components of this mechanism can achieve accurate initial positioning and stable clamping during valve cover assembly, providing reliable early protection for subsequent clamping operations, and meeting the high precision and high stability requirements of aero-engine assembly. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the main body of this utility model; Figure 2 This is a bottom view of the present invention; Figure 3 This is a schematic diagram of the flip-up clamp of this utility model; Figure 4 This is a schematic diagram of the clamping frame of this utility model.

[0015] Reference numerals: 1. Main body of clamping fixture; 2. Clamping cover plate; 3. Flip clamping plate; 4. Connecting assembly; 5. Connecting rod; 6. L-shaped connector; 7. Rotating shaft; 8. Rubber pad; 9. Pull handle; 10. Spring; 11. Guide rod; 12. Clamping frame; 13. Clamping block; 14. Insert rod; 15. Connecting plate; 16. Threaded rod; 17. Rotating handle; 18. Telescopic rod. Detailed Implementation

[0016] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0017] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationships based on the directional or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0018] In the description of this utility model, terms such as greater than, less than, and exceeding are understood to exclude the stated number, while terms such as above, below, and within are understood to include the stated number. The use of terms like "first" and "second" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the quantity or sequence of the indicated technical features.

[0019] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0020] Please see Figure 1-4 This utility model provides a technical solution: a special clamping fixture for valve chamber covers of aircraft piston engines, wherein: The clamping fixture body 1 serves as the basic load-bearing component of the entire auxiliary clamping mechanism. Multiple L-shaped connectors 6 are fixedly connected to the four bottom corners of the clamping fixture body 1. The L-shaped connectors 6 provide stable installation support for the flipping clamping plate 3, ensuring that subsequent clamping actions can be carried out around the fixed reference, thus guaranteeing the overall structural stability of the mechanism.

[0021] The flip clamp 3 is rotatably connected to the opposite surfaces of two adjacent L-shaped connectors 6. The rotating shaft 7 is fixedly connected to the surface of the flip clamp 3. The rotating shaft 7 is rotatably connected to the L-shaped connectors 6. This connection method allows the flip clamp 3 to rotate flexibly around the rotating shaft 7, providing a structural basis for switching the clamping state and meeting the position requirements of different assembly stages.

[0022] The surface of the flip clamping plate 3 is fixedly connected to the connecting assembly 4. One end of the connecting rod 5 is rotatably connected to the surface of the connecting assembly 4. The end of the connecting rod 5 near the pressing cover plate 2 is rotatably connected to the pressing cover plate 2, forming a linkage transmission structure, so that the movement of the pressing cover plate 2 can be transmitted to the flip clamping plate 3 through the connecting rod 5, realizing the synchronous coordination of the two movements.

[0023] The clamping cover plate 2 is slidably connected to the top of the clamping fixture body 1. Guide rods 11 are fixedly connected to the four bottom corners of the clamping cover plate 2. Springs 10 are fixedly connected to the four bottom corners of the clamping fixture body 1. The bottom of each spring 10 is fixedly connected to the guide rod 11. The spring 10 provides the clamping cover plate 2 with a reset elastic force, and the guide rod 11 ensures that the clamping cover plate 2 moves in a fixed direction to avoid deviation.

[0024] A pull handle 9 is fixedly connected to the top of the pressing cover plate 2. The pull handle 9 is made of metal that is easy to grip. By pulling the pull handle 9 upward, the operator can lift the pressing cover plate 2, reducing the difficulty of operation, improving the convenience of operation, and providing a convenient force application point for the subsequent linkage flipping clamp plate 3 to unfold.

[0025] Multiple rubber pads 8 are fixedly connected to the surface of the flip clamp 3. The rubber material has good elasticity and wear resistance. When the flip clamp 3 returns to its original position, the rubber pads 8 can be inserted into the cylinder head groove, which not only avoids damage to the cylinder head groove by rigid contact, but also enhances the clamping friction and improves the initial fixing stability.

[0026] Multiple telescopic rods 18 are fixedly connected to the bottom of the clamping fixture body 1. The telescopic rods 18 adopt a telescopic metal structure and have a good limiting and guiding function. The bottom of the telescopic rods 18 is fixedly connected to the clamping frame 12. The telescopic rods 18 provide stable support for the up and down movement of the clamping frame 12, ensuring that it will not deviate during the movement.

[0027] Multiple clamping blocks 13 are fixedly connected to the bottom of the clamping frame 12. The clamping blocks 13 are made of high-strength alloy material and can withstand the pressure during the assembly process. Several insertion rods 14 are fixedly connected to the bottom of the clamping blocks 13. The insertion rods 14 can be accurately inserted into the valve cover hole to achieve precise positioning of the clamping frame 12 and the valve cover.

[0028] A connecting plate 15 is fixedly connected to the top of the clamping frame 12. A threaded rod 16 is rotatably connected inside the clamping fixture body 1. The connecting plate 15 is threaded onto the outer surface of the threaded rod 16. When the threaded rod 16 rotates, it can drive the connecting plate 15 to move up and down through the threaded transmission, thereby driving the clamping frame 12 to move synchronously, so as to achieve precise control of the clamping action.

[0029] A rotating handle 17 is fixedly connected to the top of the threaded rod 16. The rotating handle 17 is designed with a non-slip material. The operator can easily drive the threaded rod 16 to rotate by rotating the rotating handle 17 without the need for additional tools, which simplifies the operation process, improves assembly efficiency, and ensures that the clamping force can be flexibly adjusted according to actual needs.

[0030] Working principle: First, pull the handle 9 upward to lift the pressure cover 2, thereby causing the two flip clamps 3 to unfold outward through the action of the connecting rod 5. Then, attach the valve cover to the top of the cylinder head with anaerobic adhesive. The operator aligns the main body 1 of the clamping fixture with the top of the valve cover, and then inserts the insertion rod 14 below the clamping block 13 into the valve cover hole. At this time, release the handle 9 and use the spring 10 to reset the pressure cover 2. The two unfolded flip clamps 3 return to their original position and insert the rubber pad 8 above them into the inner groove of the cylinder head to achieve initial fixation. Then, rotate the handle 17 to drive the threaded rod 16 to rotate. With the limiting action of the telescopic rod 18, the connecting plate 15 and the clamping frame 12 move downward, allowing the insertion rod 14 to fit with the valve cover to achieve clamping.

[0031] Example 1: (Reference) Figure 1-4 ) For large-size valve cover of aero-piston engines, the auxiliary clamping mechanism is structurally adapted and adjusted. The size of the clamping fixture body 1 is enlarged proportionally to the valve cover specifications. Simultaneously, the number of L-shaped connectors 6 is increased. One L-shaped connector 6 is fixed at each of the four corners and the midpoint of the long side of the bottom of the clamping fixture body 1. Correspondingly, flipping clamps 3 and rotating shafts 7 are added, increasing the number of flipping clamps 3 to four, evenly distributed around the bottom of the clamping fixture body 1. The length of the connecting rod 5 is adjusted synchronously according to the position of the flipping clamps 3, ensuring that all flipping clamps 3 move synchronously when the clamping cover 2 moves. The size of the clamping frame 12 is enlarged along with the clamping fixture body 1, and the number of clamping blocks 13 is increased to six, evenly distributed along the clamping frame 12. The length of the insert rod 14 remains unchanged, but its diameter is adjusted to match the specifications of the large-size valve cover holes. The number of telescopic rods 18 is adjusted to four, corresponding to the four corners of the clamping frame 12, which improves the stability of the clamping frame 12 when it moves up and down. This embodiment can achieve uniform clamping of large-size valve cover and avoid uneven clamping force caused by size adaptation problems.

[0032] Example 2: (Reference) Figure 1-2 ) To meet the assembly requirements of aero-engine pistons operating in high-temperature environments, the materials of each component of the auxiliary clamping mechanism have been optimized for high-temperature resistance. The main body 1 of the clamping fixture, the L-shaped connector 6, the flipping clamp 3, the connecting rod 5, and the clamping frame 12 are all made of high-temperature resistant stainless steel, replacing traditional alloy materials, and can withstand working temperatures above 300℃. The spring 10 is made of high-temperature resistant alloy spring to avoid spring force attenuation under high-temperature conditions. The rubber pad 8 is replaced with high-temperature resistant fluororubber to ensure good elasticity and wear resistance even at high temperatures. The threaded rod 16 is coated with a high-temperature resistant ceramic coating to reduce the impact of high temperatures on the accuracy of thread transmission. The rotating handle 17 is wrapped with a high-temperature resistant silicone anti-slip sleeve for easy gripping by operators in high-temperature environments. At the same time, high-temperature resistant grease is added inside the telescopic rod 18 to ensure flexible extension and retraction even at high temperatures. The insertion rod 14 is made of high-temperature resistant titanium alloy to improve structural strength and high-temperature resistance. This embodiment can ensure stable operation of the auxiliary clamping mechanism in high-temperature working environments, avoiding component damage or functional failure due to excessive temperature, and is suitable for valve cover assembly under high-temperature conditions.

[0033] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A special clamping fixture for valve chamber covers of aircraft piston engines, characterized in that, include: Clamping fixture body (1); The auxiliary clamping mechanism includes a clamping cover plate (2), a flipping clamp plate (3), a connecting assembly (4), a connecting rod (5), an L-shaped connector (6), and a rotating shaft (7). There are multiple L-shaped connectors (6), all of which are fixedly connected to the bottom four corners of the clamping fixture body (1). The clamping cover plate (2) is slidably connected to the top of the clamping fixture body (1). The flipping clamp plate (3) is rotatably connected to the opposite surfaces of two adjacent L-shaped connectors (6). The rotating shaft (7) is fixedly connected to the surface of the flipping clamp plate (3). The rotating shaft (7) is rotatably connected to the L-shaped connector (6). The flipping clamp plate (3) is rotatably connected to the L-shaped connector (6) through the rotating shaft (7). The connecting assembly (4) is fixedly connected to the surface of the flipping clamp plate (3). The connecting rod (5) is rotatably connected to the surface of the connecting assembly (4). The end of the connecting rod (5) near the clamping cover plate (2) is rotatably connected to the clamping cover plate (2).

2. The special clamping fixture for the valve chamber cover of an aircraft piston engine according to claim 1, characterized in that: The bottom four corners of the pressing cover plate (2) are fixedly connected with guide rods (11), and the bottom four corners of the pressing fixture body (1) are fixedly connected with springs (10). The bottom of each spring (10) is fixedly connected to the guide rod (11), and the pressing cover plate (2) is slidably connected to the pressing fixture body (1) through the guide rod (11).

3. The special clamping fixture for the valve chamber cover of an aircraft piston engine according to claim 1, characterized in that: Multiple rubber pads (8) are fixedly connected to the surface of the flip clamp (3), and a pull handle (9) is fixedly connected to the top of the pressing cover (2).

4. The special clamping fixture for the valve chamber cover of an aircraft piston engine according to claim 1, characterized in that: The bottom of the clamping fixture body (1) is fixedly connected to a plurality of telescopic rods (18), and the bottom of the telescopic rods (18) is fixedly connected to a clamping frame (12).

5. The special clamping fixture for the valve chamber cover of an aircraft piston engine according to claim 4, characterized in that: The bottom of the clamping frame (12) is fixedly connected to a plurality of clamping blocks (13), and the bottom of the clamping blocks (13) is fixedly connected to a plurality of insert rods (14).

6. The special clamping fixture for the valve chamber cover of an aircraft piston engine according to claim 4, characterized in that: The top of the clamping frame (12) is fixedly connected to a connecting plate (15), and the inside of the clamping fixture body (1) is rotatably connected to a threaded rod (16). The connecting plate (15) is threaded onto the outer surface of the threaded rod (16).

7. The special clamping fixture for the valve chamber cover of an aircraft piston engine according to claim 6, characterized in that: The top of the threaded rod (16) is fixedly connected to a rotating handle (17).

8. The special clamping fixture for the valve chamber cover of an aircraft piston engine according to claim 4, characterized in that: The clamping frame (12) is located between two flip clamps (3).

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