Miniature turbojet engine oil supply ring surrounding tool

Abstract

The utility model relates to the technical field of tool clamps, and discloses a micro turbojet engine oil supply ring surrounding tool which comprises a mandrel and further comprises a guide assembly, a step face is arranged on the side, away from the guide assembly, of the mandrel, and a limiting hole matched with one end of a thin-wall metal pipe is formed in the step face. The guide assembly comprises a guide cover, and the surface of the guide cover is provided with a limiting part I and a limiting part II which extend in the step face direction of the mandrel and abut against the thin-wall metal pipe. The lead screw is arranged at the circle center of the guide cover and is in threaded connection with the mandrel; a groove is formed in the lower surface of the front end of the limiting part I. The distance between the groove and the surface of the mandrel and the distance between the limiting part II and the surface of the mandrel are matched with the diameter of the thin-wall metal pipe. By means of the guide assembly, the thin-wall metal pipe wound on the mandrel can be accurately guided and positioned, it is guaranteed that the thin-wall metal pipe is wound according to a specific path and position, winding precision and consistency are improved, and the positioning precision of the oil supply ring circle can be guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of tooling fixtures, in particular to a tooling for an oil supply surround of a micro turbojet engine. Background Art

[0002] Micro turbojet engines, with their high thrust-to-weight ratio, compact structure, and high energy density, are widely used in military aviation, model aircraft, and other fields. The fuel supply ring plays a key role in the fuel supply system of a micro turbojet engine, and its installation accuracy directly affects the engine's performance and stability.

[0003] At present, when manufacturing the fuel supply ring of a micro turbojet engine, the existing fuel supply ring is usually operated manually. One end of the metal material of the fuel supply ring is fixed on the tooling, and the worker holds the other end of the metal material to wrap it. After the wrapping is completed, the wrapped workpiece is cut into a ring shape. This ring is the fuel supply ring. However, the following problems exist in the wrapping process:

[0004] 1. Poor positioning accuracy: With existing tooling, workers cannot accurately position the fuel supply ring by manual winding. This results in large deviations in the relative position of the pipeline and other engine components after installation. This can easily lead to fuel leakage, oil line obstruction, and other problems, seriously affecting the normal operation of the engine.

[0005] 2. Inconvenient operation: The existing tooling structure is simple, and workers have to wind it manually, which is laborious and time-consuming. The production of the oil supply ring takes a long time, which reduces production efficiency and is not conducive to large-scale production.

[0006] In the existing winding device, the material is only wound manually. During the winding process, there is no guidance and limitation, resulting in low positioning accuracy of the wound material. For example, patent application number CN201920470752.2 discloses a rubber winding tube winding and packaging tool. When winding the winding tube, the tool only needs to wrap the winding tube around the rotating rod. The wound winding tube is not limited, and the wound winding tube has problems such as positioning accuracy and large dimensional deviation. Utility Model Content

[0007] An object of the present invention is to solve at least the above problems and / or disadvantages and to provide at least the advantages to be described hereinafter.

[0008] To achieve these objectives and other advantages of the present invention, a miniature turbojet engine fuel supply surround tooling is provided, comprising: a core shaft having a thin-walled metal tube wound around its surface; and a guide assembly concentrically disposed with the core shaft via a screw rod, wherein a step surface is provided on a side of the core shaft away from the guide assembly, and a limiting hole is provided on the step surface to cooperate with one end of the thin-walled metal tube.

[0009] The guide assembly includes: a guide cover, wherein a pair of limit parts I and limit parts II are provided on the outer side of the guide cover surface, extending toward the step surface of the core shaft and abutting against the thin-walled metal tube;

[0010] The screw rod is arranged at the center of the guide cover and is threadedly connected to the core shaft;

[0011] The lower surface of the front end of the limiting portion I is provided with a groove for the thin-walled metal tube to extend into, and the distance between the groove and the limiting portion II and the core shaft surface is adapted to the diameter of the thin-walled metal tube.

[0012] Preferably, a notch for the thin-walled metal tube to extend into is provided on the surface of the limiting portion I at the groove position.

[0013] Preferably, a connecting rod is provided on one side of the core shaft to enable it to rotate around the screw; wherein a rocker arm is provided on one end of the connecting rod away from the core shaft.

[0014] Preferably, it further comprises: an L-shaped mounting bracket in space, one end of the mounting bracket is detachably connected to the external workbench, and the other end of the mounting bracket is detachably connected to the guide cover.

[0015] Preferably, a through hole is provided in the middle of the guide cover, and the guide cover and the screw rod are detachably connected via a connecting piece provided at the through hole;

[0016] Wherein, the top of the screw rod is threadedly connected to the connecting piece through the opening of the connecting hole.

[0017] The utility model includes at least the following beneficial effects: the limiting part I and the limiting part II of the guide assembly abut against the thin-walled metal tube, and the spacing is adapted to the diameter of the thin-walled metal tube, which can accurately guide and position the thin-walled metal tube wound on the core shaft, thereby realizing precise positioning of the oil supply ring. The groove provided on the limiting part I prevents the thin-walled metal tube from moving laterally when winding.

[0018] Other advantages, objectives and features of the present invention will be reflected in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of the winding tooling of the utility model;

[0020] Figure 2 A schematic diagram of the spatial connection relationship between the guide cover, core shaft, screw rod and connecting rod of the coiling tooling;

[0021] Figure 3 Schematic diagram of the guide cover structure.

[0022] Figure numerals: 1. core shaft, 2. limiting hole, 3. screw rod, 4. guide cover, 5. limiting part I, 6. limiting part II, 7. groove, 8. notch, 9. connecting rod, 10. rocker arm, 11. mounting bracket, 12. connecting part. DETAILED DESCRIPTION

[0023] The present invention will be described in further detail below in conjunction with the accompanying drawings so that those skilled in the art can implement it with reference to the text of the specification. It should be understood that terms such as "having", "including" and "comprising" used herein do not exclude the existence or addition of one or more other elements or their combinations. It should be noted that in the description of the present invention, the orientation or positional relationship indicated by the term is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. In the description of this utility model, unless otherwise expressly specified or limited, the terms "installed," "provided with," "mounted / connected," and "connected" should be understood broadly. For example, "connected" can refer to fixed, removable, or integral connections, mechanical or electrical connections, direct connections, indirect connections through an intermediary, or internal communication between two components. A person skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances. Furthermore, in this utility model, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, "above," "above," and "above" a first feature can mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. "Below," "below," and "below" a first feature can mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0024] like Figure 1-Figure 3 The illustrated tooling for a micro-turbojet engine fuel supply ring includes: a core shaft 1 around which a thin-walled metal tube is wound; and a guide assembly concentrically disposed with the core shaft 1 via a screw rod 3. The core shaft 1 has a stepped surface on a side away from the guide assembly, and the stepped surface is provided with a limiting hole 2 that cooperates with one end of the thin-walled metal tube.

[0025] The guide assembly includes: a guide cover 4, and a pair of limit parts I 5 and II 6 are provided on the outer surface of the guide cover 4, extending toward the step surface of the core shaft 1 and abutting against the thin-walled metal tube;

[0026] The screw rod 3 is arranged at the center of the guide cover 4 and is threadedly connected to the core shaft 1;

[0027] The lower surface of the front end of the limiting portion I5 is provided with a groove 7 for the thin-walled metal tube to extend into, and the distance between the groove 7 and the limiting portion II6 and the surface of the core shaft 1 is adapted to the diameter of the thin-walled metal tube.

[0028] Working principle:

[0029] First, pass the thin-walled metal tube through the groove 7 on the guide cover 4 (the thin-walled metal tube here is configured as a stainless steel thin-walled tube with an outer diameter of 3.5 mm and an inner diameter of 2.5 mm), and bend one end of the thin-walled metal tube 90 degrees and insert it into the limiting hole 2. The depth of the limiting hole 2 is 10 mm. Rotate the core shaft 1 counterclockwise, and the thin-walled metal tube is driven by the limiting hole 2 of the core shaft 1 and begins to wrap around the core shaft 1. Because the limiting part I5 and the limiting part II6 of the guide assembly are in contact with the thin-walled metal tube, and the distance between the groove 7 and the limiting part II6 and the surface of the core shaft 1 is adapted to the diameter of the thin-walled metal tube, the thin-walled metal tube fits tightly against the surface of the core shaft 1 during the winding process. As the core shaft 1 continues to rotate, the thin-walled metal tube is tightly wrapped around the surface of the core shaft 1 in circles, completing the winding of each thin-walled metal tube. After winding is completed, the mandrel 1 is removed from the screw 3, and the wound thin-walled metal tube is manually removed from the front end of the mandrel 1 for subsequent processing. During this process, the pitch of the screw 3 is consistent with the diameter of the thin-walled metal tube, ensuring that the thin-walled metal tube is wrapped around the surface of the mandrel 1 once the screw 3 rotates one circle, ensuring that each circle of the thin-walled metal tube is tightly fitted during winding. At the same time, the groove 7 on the limit part I5 prevents the thin-walled metal tube from moving laterally during the winding process. The limit part II6 further plasticizes the wound thin-walled metal tube to reduce the elastic deformation caused by bending of the thin-walled metal tube.

[0030] In the above technical solution, the surface of the stopper portion I5 is provided with a notch 8 at the location of the groove 7 for the thin-walled metal tube to extend into. This technical solution makes it easier for the operator to align the thin-walled metal tube and insert it into the notch 8, and then into the groove 7, when installing it on the tooling. This design reduces operational difficulty and improves work efficiency.

[0031] In the above technical solution, a connecting rod 9 is provided on one side of the mandrel 1, enabling it to rotate around the screw 3. A rocker arm 10 is provided on the end of the connecting rod 9 away from the mandrel 1. This technical solution makes it easier to drive the mandrel 1 to rotate around the screw 3 via the rocker arm 10. The operator simply grasps the rocker arm 10 and applies force to rotate the mandrel 1 in the desired direction and speed, quickly wrapping the thin-walled metal tube around the surface of the mandrel 1 and completing the winding operation of the oil supply ring.

[0032] The above technical solution also includes an L-shaped mounting bracket 11, one end of which is detachably connected to the external workbench, and the other end of which is detachably connected to the guide cover 4. With this technical solution, mounting bracket 11 is provided with connecting flanges at both ends. The flange at one end secures the guide cover 4 to mounting bracket 11, while the flange at the other end secures mounting bracket 11 to the external workbench. The bottom of mounting bracket 11 is fixed to the external workbench, ensuring stable use of the tooling on the workbench and ensuring the dimensional accuracy of the oil supply ring.

[0033] In the above technical solution, a through hole is opened in the middle of the guide cover 4, and the guide cover 4 and the screw rod 3 are detachably connected via a connecting piece 12 provided at the through hole;

[0034] The top of the screw rod 3 is threadedly connected to the connector 12 through the opening of the connection hole. With this technical solution, when the guide cover 4 or screw rod 3 of the tooling is worn, damaged, etc., due to the detachable connection method, the connector 12 here is a bolt, which can easily separate the screw rod 3 and the guide cover 4. The staff can easily repair the damaged parts or directly replace the new guide cover 4 and screw rod 3 without replacing the tooling as a whole, which greatly reduces the maintenance cost and time cost and significantly improves the use efficiency and service life of the tooling. For example, after long-term use, if the limiting part of the guide cover 4 is worn due to frequent friction with the thin-walled metal tube, resulting in a decrease in the guiding accuracy of the thin-walled metal tube, the guide cover 4 can be quickly disassembled for repair or replacement, so that the tooling can quickly return to a good working condition;

[0035] Among them, because the core shaft 1 rotates counterclockwise when winding the thin-walled metal tube, the connection piece 12 is tightened, thereby avoiding the possibility of it becoming loose when winding the thin-walled metal tube.

[0036] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the description and implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with this field, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A micro turbojet engine fuel supply ring tooling, comprising: A mandrel for winding a thin-walled metal tube around its surface, characterized in that it further comprises: a guide assembly arranged concentrically with the mandrel via a screw rod, the mandrel being provided with a stepped surface on a side away from the guide assembly, the stepped surface being provided with a limiting hole that cooperates with one end of the thin-walled metal tube; The guide assembly includes: a guide cover, wherein a pair of limit parts I and limit parts II are provided on the outer side of the guide cover surface, extending toward the step surface of the core shaft and abutting against the thin-walled metal tube; The screw rod is arranged at the center of the guide cover and is threadedly connected to the core shaft; The lower surface of the front end of the limiting portion I is provided with a groove for the thin-walled metal tube to extend into, and the distance between the groove and the limiting portion II and the core shaft surface is adapted to the diameter of the thin-walled metal tube.

2. The micro-turbojet engine fuel supply surround tooling according to claim 1, characterized in that: The surface of the limiting portion I is provided with a notch at the groove position for the thin-walled metal tube to extend into.

3. The micro-turbojet engine fuel supply surround tooling according to claim 1, characterized in that: A connecting rod is provided on one side of the core shaft, which enables it to rotate around the screw rod; Wherein, a rocker arm is provided at one end of the connecting rod away from the core shaft.

4. The micro-turbojet engine fuel supply surrounding ring tooling according to claim 1, characterized in that: Also includes: The mounting bracket is L-shaped in space, one end of the mounting bracket is detachably connected to the external workbench, and the other end of the mounting bracket is detachably connected to the guide cover.

5. The micro-turbojet engine fuel supply surround tooling according to claim 1, characterized in that: A through hole is provided in the middle of the guide cover, and the guide cover and the screw rod are detachably connected via a connecting piece provided at the through hole; Wherein, the top of the screw rod is threadedly connected to the connecting piece through the opening of the connecting hole.

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