A precooler positioning fixture

Abstract

This utility model relates to the field of precooler technology, and more particularly to a precooler positioning fixture, comprising: a base plate, side plate A, side plate B, quick clamps, a side adjustment mechanism, and a clamping mechanism. Side plate A is fixedly connected to the base plate, side plate B is arranged opposite to side plate A, and side plate B is slidably connected to the base plate. Quick clamps are respectively installed on the outer sides of side plate A and side plate B. The side adjustment mechanism is installed on one side of side plate B. The clamping mechanism includes precooler fixing plate A and precooler fixing plate B, which are respectively inserted into the left and right sides of the precooler. Precooler fixing plate A is connected to side plate B via a rotating shaft. This utility model is customized according to the actual external dimensions of the precooler. The relative layout of side plate A and side plate B, and the height and position of the supporting columns are all matched with the height of the precooler, achieving precise fixing and load-bearing of the product, and ensuring the accuracy of the positioning benchmark from the design source.

Description

Technical Field

[0001] This utility model relates to the field of precooler technology, and in particular to a precooler positioning fixture. Background Technology

[0002] Currently, precoolers are key devices that reduce the temperature of the working fluid before it enters the main equipment through heat exchange, and are widely used in fields such as aero engines, refrigerated dryers, and refrigeration tooling. In the aviation field, precoolers enhance cycle power and thrust by cooling high-temperature ram air, thus expanding the engine's operating range. Their core function is to rapidly cool the extremely high-temperature air flowing into the engine within a very short time.

[0003] The existing technology has the following technical problems:

[0004] 1. Most existing tooling is designed to accommodate multiple models, and the position and size of its positioning elements (such as support blocks, grippers, etc.) are not tailored to the specific shape of the precooler. This results in a matching gap between the tooling and the precooler, making it impossible to achieve precise wrapping and fixation. This causes deviations and redundant degrees of freedom in the positioning of the precooler, which not only reduces the accuracy of the positioning reference but also makes it prone to shaking and displacement during operation, making it difficult to guarantee reliability.

[0005] 2. Existing tooling uses a single positioning method and lacks multi-dimensional collaborative control, which cannot guarantee the spatial positioning accuracy of accessories. Traditional positioning schemes often focus only on fixation in a single direction (such as clamping only from the side), failing to construct a complete spatial positioning structure. This single-dimensional positioning method cannot simultaneously guarantee the precise pose of the precooler body and its connecting accessories in three-dimensional space, directly affecting the final assembly or processing quality.

[0006] Therefore, a precooler positioning fixture that can solve the above problems is needed. Utility Model Content

[0007] The purpose of this utility model is to provide a precooler positioning fixture. This fixture is customized according to the actual external dimensions of the precooler. The relative layout of its side plate A and side plate B, as well as the height and position of the supporting columns, are all matched with the height of the precooler, realizing the precise fixing and bearing of the product. It ensures the accuracy of the positioning benchmark from the design source and effectively avoids the positioning redundancy and unreliability caused by excessive universality of the fixture.

[0008] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a precooler positioning fixture, comprising: a base plate, side plate A, side plate B, quick clamps, a side adjustment mechanism, and a clamping mechanism. Side plate A is fixedly connected to the base plate, side plate B is disposed opposite to side plate A, and side plate B is slidably connected to the base plate. The quick clamps are respectively installed on the outer sides of side plate A and side plate B. The side adjustment mechanism is installed on one side of side plate B. The clamping mechanism includes a precooler fixing plate A and a precooler fixing plate B, which are respectively inserted into the left and right sides of the precooler. The precooler fixing plate A is connected to side plate B through a rotating shaft, and the precooler fixing plate B is connected to a clamping plate disposed on the outer side of side plate A through a rotating shaft.

[0009] Furthermore, the side adjustment mechanism includes a fine-tuning plate, a lead screw, and a handwheel. The fine-tuning plate is fixedly connected to one side of the base plate, one end of the lead screw is fixedly connected to the handwheel, and the other end of the lead screw passes through the side plate B and is fixed to the side plate B by a nut.

[0010] Furthermore, the quick clamp installed on side plate A is used to clamp and fix the card plate, and the quick clamp installed on side plate B is used to clamp and fix the rotating shaft.

[0011] Furthermore, a support column is fixedly connected to the base plate. The support column is located below the precooler and is used to support the precooler.

[0012] Furthermore, a lower reinforcing rib is fixedly connected to the bottom of the base plate.

[0013] Furthermore, the card plate and the side plate A are connected to each other by indexing pins.

[0014] Furthermore, positioning grippers are installed on the precooler fixed plate B.

[0015] The advantages of this utility model are:

[0016] 1. This fixture is customized according to the actual external dimensions of the precooler. The relative layout of its side plate A and side plate B, as well as the height and position of the support column, are all matched with the height of the precooler, achieving precise fixing and load-bearing of the product. This ensures the accuracy of the positioning benchmark from the design source and effectively avoids positioning redundancy and unreliability caused by excessive universality of the fixture.

[0017] 2. This fixture features reliable positioning and clamping mechanisms in three dimensions (X / Y / Z directions), forming a complete spatial positioning system. Specifically, in the X direction, the axial clamping distance of the precooler is controlled by the sliding of side plate B and the precise fine-tuning of the side adjustment mechanism; in the Y direction, the radial movement of the precooler is restricted by the insertion and engagement of the precooler fixing plates A and B; and in the Z direction, stable vertical support is provided by the support columns. This three-dimensional positioning system comprehensively ensures the spatial positioning accuracy of the precooler and its accessories. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific 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.

[0019] Figure 1 This is a schematic diagram of the main structure of this utility model.

[0020] Figure 2 This is a three-dimensional structural diagram of the present invention.

[0021] The components are: 1. Base plate; 2. Side plate A; 3. Rotating shaft; 4. Precooler fixing plate A; 5. Side plate B; 6. Clamping plate; 7. Copper sleeve; 8. Indexing pin; 9. Lower reinforcing rib; 10. Fine adjustment plate; 11. Lead screw; 12. Handwheel; 14. Quick clamp; 15. Nut; 16. Precooler; 17. Support column; 18. Precooler fixing plate B; 19. Positioning gripper. Detailed Implementation

[0022] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. 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] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "installed," "connected," and "linked" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] Example 1:

[0025] Figure 1 This is a schematic diagram of the main structure of this utility model. Figure 2 This is a three-dimensional structural diagram of the present invention, as shown below. Figure 1 and Figure 2 As shown, this embodiment provides a positioning fixture specifically designed for aircraft precoolers. This fixture effectively solves problems such as inaccurate positioning due to general-purpose design and poor spatial orientation accuracy of accessories caused by the lack of multi-dimensional positioning in existing technologies. The precooler positioning fixture of this embodiment mainly includes a base plate, side plate A, side plate B, quick clamp, side adjustment mechanism, and clamping mechanism.

[0026] In this invention, the base plate serves as the foundation platform for the entire tooling, providing installation reference and support for all other components. To ensure the overall rigidity and stability of the tooling under load and stress, and to prevent deformation, a lower reinforcing rib is fixedly connected to the bottom of the base plate. The lower reinforcing rib is connected to the base plate by welding or integral casting, greatly enhancing the bending strength of the base plate and providing a solid and reliable foundation for high-precision positioning.

[0027] In this invention, side plate A is fixedly connected to one end of the base plate (by bolts). Its function is to provide a fixed reference for one side of the tooling. Side plate B is disposed opposite to side plate A and located at the other end of the base plate. Side plate B and the base plate are slidably connected to each other, and side plate B can move relative to side plate A, thereby accommodating precoolers of different sizes or providing initial space for clamping the precooler.

[0028] The side adjustment mechanism of this invention is installed on one side of side plate B to achieve precise fine-tuning of the position of side plate B. In this embodiment, the side adjustment mechanism includes a fine-tuning plate, a lead screw, and a handwheel. The fine-tuning plate is fixedly connected to one side of the base plate, and its function is to provide a stable support base for the lead screw. One end of the lead screw is fixedly connected to the handwheel, and the other end passes through side plate B and is fixed to side plate B by a nut. By rotating the handwheel, the lead screw can be driven to rotate in or out relative to the fine-tuning plate, thereby driving side plate B to move precisely and within a small range along the base plate. This mechanism effectively solves the problem of coarse adjustment and inability to precisely control the clamping distance in the X-axis (axial direction) of existing tooling, ensuring the accuracy of the axial positioning of the precooler.

[0029] The clamping mechanism in this invention is the core component that directly contacts and positions the precooler, and includes precooler fixing plate A and precooler fixing plate B. Precooler fixing plates A and B are customized according to the specific shape and size of the interfaces at both ends of the precooler, allowing for precise insertion into the left and right interfaces of the precooler. This customized insertion ensures the uniqueness and accuracy of the positioning reference from the design stage, completely eliminating positioning redundancy and unreliability caused by the gaps in matching general tooling. Precooler fixing plate A is connected to a movable side plate B via a rotating shaft, giving it a certain degree of rotational freedom, facilitating the insertion and removal of the precooler. Precooler fixing plate B is connected to a clamping plate located on the outside of side plate A via a rotating shaft. To further ensure that the clamping plate and its connected precooler fixing plate B can quickly return to the precise preset angle position during each installation, the clamping plate is connected to side plate A via indexing pins. The indexing pins are inserted into pin holes at different angles on side plate A to achieve multi-angle positioning. This design ensures high repeatability of the precooler's circumferential angle positioning accuracy. In addition, positioning claws can be installed on the precooler fixing plate B to assist in clamping the precooler from the side, further enhancing the limiting in the Y-axis (radial) direction and preventing its rotation or radial movement.

[0030] This invention features two quick-clamping devices, respectively installed on the outer sides of side plates A and B. Their function is to provide a quick and reliable manual locking force. Specifically, the quick-clamping device installed on side plate A is used to clamp and fix the clamping plate after angle adjustment, thereby locking the precooler fixing plate B. The quick-clamping device installed on side plate B is used to clamp and fix the rotating shaft, thereby locking the precooler fixing plate A. The operation of the quick-clamping devices greatly improves clamping efficiency and ensures stable and reliable clamping force.

[0031] This invention features a support column fixedly connected to the base plate, directly below the precooler. The height and top shape of the support column are custom-designed according to the outline of the precooler. Its function is to provide stable rigid support for the precooler along the Z-axis (vertical direction), effectively resisting the precooler's own weight and downward pressure during processing, preventing the precooler from sagging or deforming due to its own weight, and perfecting the Z-axis support in the three-dimensional positioning system.

[0032] Working Principle: In use, first loosen the quick-release clamps on both sides, then rotate the handwheel to move side plate B3, widening the space between the two fixed plates. Hoist the precooler onto the support column for initial positioning. Move side plate B to engage precooler fixed plate A with one end of the precooler, then rotate the clamping plate to engage precooler fixed plate B with the other end of the precooler, and insert the indexing pin to determine the angle. Then, use the side adjustment mechanism for fine-tuning to ensure the precooler is in the ideal axial position. Finally, use the quick-release clamps on both sides to lock the rotating shaft and the clamping plate, completing the precise clamping and fixing of the precooler.

[0033] In summary, this embodiment successfully constructed a complete spatial positioning fixture customized for the precooler, covering the X, Y, and Z directions, through the synergistic effect of the aforementioned components. This comprehensively ensures the precise pose of the precooler body and its connecting accessories in three-dimensional space.

[0034] 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 the 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 or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A pre-cooler positioning fixture, characterized by, include: The system comprises a base plate, side plate A, side plate B, quick clamps, a side adjustment mechanism, and a clamping mechanism. Side plate A is fixedly connected to the base plate. Side plate B is positioned opposite to side plate A and is slidably connected to the base plate. The quick clamps are respectively installed on the outer sides of side plates A and B. The side adjustment mechanism is installed on one side of side plate B. The clamping mechanism includes a precooler fixing plate A and a precooler fixing plate B, which are respectively inserted into the left and right sides of the precooler. The precooler fixing plate A is connected to side plate B via a rotating shaft. The precooler fixing plate B is connected to a clamping plate located on the outer side of side plate A via a rotating shaft.

2. A pre-cooler positioning tool as claimed in claim 1, wherein: The side adjustment mechanism includes a fine adjustment plate, a lead screw, and a handwheel. The fine adjustment plate is fixedly connected to one side of the base plate. One end of the lead screw is fixedly connected to the handwheel, and the other end of the lead screw passes through the side plate B and is fixed to the side plate B by a nut.

3. A pre-cooler positioning tool as claimed in claim 1, wherein: The quick clamp installed on side plate A is used to clamp and fix the card plate, and the quick clamp installed on side plate B is used to clamp and fix the rotating shaft.

4. A precooler positioning fixture as defined in claim 1, wherein: A support column is fixedly connected to the base plate. The support column is located below the precooler and is used to support the precooler.

5. A precooler positioning fixture as defined in claim 1, wherein: The bottom of the base plate is fixedly connected to a lower reinforcing rib.

6. A precooler positioning fixture as defined in claim 1, wherein: The card plate and side plate A are connected to each other by indexing pins.

7. A pre-cooler positioning tool as claimed in claim 1, wherein: The precooler fixed plate B is equipped with positioning claws.

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