Multi-stage electric telescopic pipeline and oil receiving device

Abstract

The utility model discloses a multi-stage electric telescopic pipeline and an oil receiving device. The multi-stage electric telescopic pipeline comprises a fixed cylinder; the telescopic assembly comprises a primary telescopic cylinder, a secondary telescopic cylinder and a third-stage telescopic cylinder which are sequentially arranged from outside to inside in a sleeving mode, and the primary telescopic cylinder is sleeved with the fixed cylinder; the transmission assembly comprises a primary hollow lead screw, a secondary hollow lead screw and a third-level hollow lead screw which are sequentially arranged from inside to outside in a sleeving mode. The driving assembly comprises a gear box arranged at one end of the fixing cylinder, a gear transmission part arranged in the gear box and a driving motor arranged on the gear box, and the driving motor drives the primary hollow lead screw to rotate through the gear transmission part. Through optimized arrangement of the structures between the telescopic cylinders and the transmission parts, synchronous telescopic control over the telescopic cylinders is achieved, the time needed by telescopic action is shortened, the structure is simpler and more compact, the telescopic action is more stable, the telescopic precision is easier to guarantee, and the service life of the telescopic cylinder is prolonged. And the reliability and the stability of the telescopic action of the telescopic pipeline are well ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of aircraft refueling devices, and in particular relates to a multi-stage electric telescopic pipeline and a refueling device. Background Art

[0002] Aerial refueling technology enables mid-air refueling of aircraft, reducing the number of landings and increasing their maneuverability and stealth. Currently, retractable aerial refueling devices are commonly used. During refueling operations, they extend from the aircraft's interior to dock with the refueling aircraft. When refueling is no longer required, the pipeline retracts back inside the aircraft, enhancing the aircraft's stealth and maneuverability. Therefore, the retractability of the refueling device significantly impacts its functionality and is directly related to the safety and reliability of aerial refueling. Utility Model Content

[0003] The purpose of the utility model is to provide a multi-stage electric telescopic pipeline and an oil receiving device to ensure the reliability and stability of the telescopic action of the telescopic pipeline.

[0004] The utility model is achieved through the following technical solutions:

[0005] Multi-stage electric telescopic pipe, including:

[0006] Fixed cylinder;

[0007] The telescopic assembly includes a primary telescopic cylinder, a secondary telescopic cylinder and a tertiary telescopic cylinder which are sequentially sleeved from the outside to the inside, and the fixed cylinder is sleeved outside the primary telescopic cylinder;

[0008] The transmission assembly comprises a primary hollow screw, a secondary hollow screw and a tertiary hollow screw which are sequentially sleeved from the inside to the outside, and the transmission assembly is arranged in the three-stage telescopic cylinder; a rotation limiting structure is respectively provided between the primary hollow screw and the secondary hollow screw, and between the secondary hollow screw and the tertiary hollow screw, for limiting the relative rotation between the primary hollow screw and the secondary hollow screw, and between the secondary hollow screw and the tertiary hollow screw; a primary screw nut is provided at one end of the secondary screw, and the primary screw nut is transmission-connected to the primary hollow screw and fixedly connected to the primary telescopic cylinder; a secondary screw nut is provided at one end of the tertiary hollow screw, and the secondary screw nut is transmission-connected to the secondary hollow screw and fixedly connected to the secondary telescopic cylinder; a tertiary screw nut is provided at one end of the tertiary telescopic cylinder, and the tertiary screw nut is transmission-connected to the tertiary hollow screw;

[0009] The driving assembly comprises a gear box arranged at one end of the fixed cylinder, a gear transmission member arranged in the gear box and a driving motor arranged on the gear box. The driving motor drives the primary hollow screw to rotate through the gear transmission member.

[0010] In some embodiments, the rotation limiting structure is a keyway matching structure provided between the primary hollow screw and the secondary hollow screw, and between the secondary hollow screw and the tertiary hollow screw.

[0011] In some embodiments, a support ring is provided at the end away from the drive assembly, between the primary hollow screw and the secondary hollow screw, between the secondary hollow screw and the tertiary hollow screw, between the tertiary hollow screw and the tertiary telescopic cylinder, between the tertiary telescopic cylinder and the secondary telescopic cylinder, between the secondary telescopic cylinder and the primary telescopic cylinder, and between the primary telescopic cylinder and the fixed cylinder.

[0012] In some embodiments, a sealing ring is provided between the tertiary telescopic cylinder and the secondary telescopic cylinder, between the secondary telescopic cylinder and the primary telescopic cylinder, and between the primary telescopic cylinder and the fixed cylinder, at an end away from the drive assembly.

[0013] In some embodiments, a guide structure is provided between the tertiary telescopic cylinder and the secondary telescopic cylinder, between the secondary telescopic cylinder and the primary telescopic cylinder, and between the primary telescopic cylinder and the fixed cylinder, for providing guidance for the relative movement along the axial direction between the tertiary telescopic cylinder and the secondary telescopic cylinder, between the secondary telescopic cylinder and the primary telescopic cylinder, and between the primary telescopic cylinder and the fixed cylinder.

[0014] In some embodiments, one end of the primary hollow screw is inserted into the gear box and extends out of the gear box from the other end thereof, and bearings are provided between the two ends of the gear box and the gear box;

[0015] The gear transmission member includes a driving gear arranged on the rotating shaft of the driving motor, a driven gear arranged on the primary hollow screw, and transmission gears respectively meshing with the driving gear and the driven gear.

[0016] In some embodiments, bearing covers are respectively provided on the outer sides of both ends of the gear box, the bearing covers are fixedly connected to the gear box, and a sealing ring is provided between the bearing cover and the primary hollow screw.

[0017] In some embodiments, the drive motor is a drive motor with a braking function.

[0018] On the other hand, the present invention also provides an oil receiving device, comprising the multi-stage electric telescopic pipeline, wherein the end of the three-stage telescopic cylinder is provided with a bend pipe, and the other end of the bend pipe is provided with an oil receiving probe.

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

[0020] The utility model realizes synchronous telescopic control of the telescopic cylinders at all levels by optimizing the arrangement of the structures between the telescopic cylinders at all levels and the transmission parts at all levels, thereby reducing the time required for the telescopic action. The utility model has a simpler and more compact structure, a more stable telescopic action, and an easier to ensure telescopic accuracy, thereby well ensuring the reliability and stability of the telescopic action of the telescopic pipeline.

[0021] A gear box is arranged at one end of the fixed cylinder, and the gear box is used as the bearing basis for the drive motor and the gear transmission parts, which can better realize the integrated design of the oil receiving device structure, facilitate the installation of the oil receiving device on the aircraft, and the drive motor can drive the primary hollow screw more stably and reliably. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 This is a structural schematic diagram of the oil receiving device in the retracted state according to an embodiment of the utility model.

[0024] Figure 2 This is a schematic diagram of the structure of the oil receiving device drive assembly according to an embodiment of the present utility model.

[0025] Figure 3 for Figure 1 Partial schematic diagram at point A in the middle.

[0026] Figure 4 for Figure 1 Schematic diagram of the cross section along the BB direction.

[0027] Figure 5 This is a structural schematic diagram of the oil receiving device in the extended state according to an embodiment of the utility model.

[0028] Figure 6 for Figure 5 Partial schematic diagram at point C in the middle.

[0029] Figure 7 for Figure 5 Partial schematic diagram at point D in the middle.

[0030] Figure 8 for Figure 5 Partial schematic diagram at point E in the middle.

[0031] in:

[0032] 10. Fixed cylinder;

[0033] 21. Primary hollow screw, 22. Secondary hollow screw, 23. Tertiary hollow screw;

[0034] 31. Primary telescopic cylinder, 32. Secondary telescopic cylinder, 33. Tertiary telescopic cylinder;

[0035] 41. Primary screw nut, 42. Secondary screw nut, 43. Tertiary screw nut, 44. Stopper;

[0036] 61. Drive motor, 62. Gear box, 63. Driving gear, 64. Driven gear, 65. Transmission gear, 66. Bearing, 67. Bearing cover;

[0037] 71. Sealing ring, 72. Support ring, 73. Keyway matching structure;

[0038] 81. Elbow pipe, 82. Oil receiving probe. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in combination with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0040] Reference Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8 As shown, in some embodiments of the present invention, the multi-stage electric telescopic pipeline includes:

[0041] Fixed cylinder 10;

[0042] The telescopic assembly includes a primary telescopic cylinder 31, a secondary telescopic cylinder 32, and a tertiary telescopic cylinder 33 which are sleeved in sequence from the outside to the inside, and the fixed cylinder 10 is sleeved outside the primary telescopic cylinder 31;

[0043] The transmission assembly includes a primary hollow screw 21, a secondary hollow screw 22 and a tertiary hollow screw 23 which are sequentially sleeved from the inside to the outside. The transmission assembly is arranged in the three-stage telescopic cylinder 33. A rotation limiting structure is respectively provided between the primary hollow screw 21 and the secondary hollow screw 22, and between the secondary hollow screw 22 and the tertiary hollow screw 23 to limit the relative rotation between the primary hollow screw and the secondary hollow screw, and between the secondary hollow screw and the tertiary hollow screw; a rotation limiting structure is provided between the primary hollow screw 21 and the secondary hollow screw 22, and between the secondary hollow screw 22 and the tertiary hollow screw A primary lead screw nut 41 is provided at one end, which is in transmission connection with the primary hollow lead screw 21 and fixedly connected to the primary telescopic cylinder 31; a secondary lead screw nut 42 is provided at one end of the tertiary hollow lead screw 23, which is in transmission connection with the secondary hollow lead screw 22 and fixedly connected to the secondary telescopic cylinder 32; a tertiary lead screw nut 43 is provided at one end of the tertiary telescopic cylinder 33, which is in transmission connection with the tertiary hollow lead screw 23;

[0044] The driving assembly includes a gear box 62 arranged at one end of the fixed cylinder, a gear transmission member arranged in the gear box, and a driving motor 61 arranged on the gear box. The driving motor 61 drives the primary hollow screw 21 to rotate through the gear transmission member.

[0045] By optimizing the structure of the telescopic cylinders at each level and the transmission parts at each level, the synchronous telescopic control of the telescopic cylinders at each level is achieved, which reduces the time required for the telescopic action. The structure is simpler and more compact, the telescopic action is more stable, and the telescopic accuracy is easier to ensure, thereby ensuring the reliability and stability of the telescopic action of the telescopic pipeline.

[0046] A gear box is arranged at one end of the fixed cylinder, and the gear box is used as the bearing basis for the drive motor and the gear transmission parts, which can better realize the integrated design of the oil receiving device structure, facilitate the installation of the oil receiving device on the aircraft, and the drive motor can drive the primary hollow screw more stably and reliably.

[0047] The primary hollow screw, secondary hollow screw, tertiary hollow screw, tertiary telescopic cylinder, secondary telescopic cylinder, primary telescopic cylinder, and fixed cylinder are connected by the outer and inner walls of each other to form a compact connection structure. The hollow structure of the primary hollow screw, secondary hollow screw, and tertiary hollow screw serves as a fluid delivery channel, making the overall structure more compact.

[0048] In some embodiments, the rotation limiting structure is a keyway mating structure 73 provided between the primary hollow screw and the secondary hollow screw, and between the secondary hollow screw and the tertiary screw. The key and keyway mating structure can limit the relative rotation between the hollow screws at each stage, allowing axial movement between the hollow screws at each stage under the action of the screw nut, while driving the secondary and tertiary hollow screws to rotate at the same angular velocity as the primary hollow screw, and facilitating assembly of the hollow screws at each stage.

[0049] In some embodiments, a support ring 72 is provided between the primary hollow lead screw and the secondary hollow lead screw, between the secondary hollow lead screw and the tertiary hollow lead screw, between the tertiary hollow lead screw and the tertiary telescopic cylinder, between the tertiary telescopic cylinder and the secondary telescopic cylinder, between the secondary telescopic cylinder and the primary telescopic cylinder, and between the primary telescopic cylinder and the fixed cylinder, at one end near the oil receiving probe. The support ring provides support for the ends of each hollow lead screw and each telescopic cylinder, ensuring structural stability when the hollow lead screws and each telescopic cylinder are extended.

[0050] In some embodiments, a sealing ring 71 is provided between the tertiary and secondary telescopic cylinders, between the secondary and primary telescopic cylinders, and between the primary and fixed cylinders, at the end away from the drive assembly. These sealing rings are O-rings that seal the fixed cylinder, the various telescopic cylinders, and the various hollow lead screws at their connections, ensuring the sealing performance of the oil receiving device and preventing fuel leakage.

[0051] In some embodiments, guide structures are provided between the tertiary and secondary telescopic cylinders, between the secondary and primary telescopic cylinders, and between the primary and fixed cylinders to guide the relative axial movement between the tertiary and secondary telescopic cylinders, between the secondary and primary telescopic cylinders, and between the primary and fixed cylinders. For example, a sliding key connection is employed between each stage of the telescopic cylinders and the fixed cylinder to provide guidance for the telescopic movement between the stages.

[0052] In some embodiments, one end of the primary hollow screw 21 extends into the gear box 61 and extends out of the gear box from the other end thereof, and bearings 66 are provided between the two ends of the primary hollow screw 21 and the gear box.

[0053] The gear transmission member includes a driving gear 63 provided on the rotating shaft of the driving motor, a driven gear 64 provided on the primary hollow screw, and a transmission gear 65 meshingly connected with the driving gear and the driven gear respectively.

[0054] The primary hollow screw is connected to the gear box at both ends through bearings, which can well ensure the stability of the rotation of the primary hollow screw when the drive motor drives the primary hollow screw, thereby ensuring the stability of the telescopic action and the accuracy of the drive control.

[0055] Extending the primary hollow screw out of the gear box can facilitate the connection between the primary hollow screw and the aircraft oil pipe, thereby facilitating the installation of the oil receiving device on the aircraft.

[0056] In some embodiments, bearing covers 67 are respectively provided on the outer sides of both ends of the gear box, and the bearing covers are fixedly connected to the gear box. A sealing ring 71 is provided between the bearing cover 67 and the primary hollow screw 21 to effectively seal the gear box and the primary hollow screw.

[0057] In some embodiments, the drive motor is a motor with a braking function. The braking function of the drive motor enables the drive motor to brake the motor shaft when it stops rotating, so that the motor shaft does not rotate under the action of external forces. This can prevent the oil probe, the elbow, the hollow screws at each stage, and the telescopic cylinders at each stage from moving when subjected to external forces.

[0058] On the other hand, the present invention also provides an oil receiving device, referring to Figure 1 and Figure 5 The oil receiving device includes a multi-stage electric telescopic pipeline, a bend pipe 81 is provided at the end of the three-stage telescopic cylinder 33, and an oil receiving probe 82 is provided at the other end of the bend pipe 81.

[0059] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. used to indicate the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the utility model product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as a limitation on the present invention.

[0060] Furthermore, the use of terms such as "horizontal" and "vertical" in the description of this invention does not necessarily mean that the components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that the direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0061] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0062] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification or equivalent change made to the above embodiment based on the technical essence of the present invention falls within the scope of protection of the present invention.

Claims

1. Multi-stage electric telescopic pipeline, characterized in that: include: Fixed cylinder; The telescopic assembly includes a primary telescopic cylinder, a secondary telescopic cylinder and a tertiary telescopic cylinder which are sequentially sleeved from the outside to the inside, and the fixed cylinder is sleeved outside the primary telescopic cylinder; A transmission assembly includes a primary hollow lead screw, a secondary hollow lead screw, and a tertiary hollow lead screw, which are sequentially sleeved from the inside to the outside. The transmission assembly is disposed within the three-stage telescopic cylinder. A rotation limiting structure is provided between the primary hollow lead screw and the secondary hollow lead screw, and between the secondary hollow lead screw and the tertiary hollow lead screw, respectively, for limiting relative rotation between the primary hollow lead screw and the secondary hollow lead screw, and between the secondary hollow lead screw and the tertiary hollow lead screw. A primary screw nut is provided at one end of the secondary screw, and the primary screw nut is transmission-connected to the primary hollow screw and fixedly connected to the primary telescopic cylinder; A secondary screw nut is provided at one end of the third-stage hollow screw, the secondary screw nut is in transmission connection with the secondary hollow screw and is fixedly connected to the secondary telescopic cylinder; a third-stage screw nut is provided at one end of the third-stage telescopic cylinder, the third-stage screw nut is in transmission connection with the third-stage hollow screw; The driving assembly comprises a gear box arranged at one end of the fixed cylinder, a gear transmission member arranged in the gear box and a driving motor arranged on the gear box. The driving motor drives the primary hollow screw to rotate through the gear transmission member.

2. The multi-stage electric telescopic pipeline according to claim 1, characterized in that: The rotation limiting structure is a keyway matching structure arranged between the primary hollow screw and the secondary hollow screw, and between the secondary hollow screw and the tertiary hollow screw.

3. The multi-stage electric telescopic pipeline according to claim 1, characterized in that: A support ring is provided at the end away from the drive assembly, and is located between the primary hollow screw and the secondary hollow screw, between the secondary hollow screw and the tertiary hollow screw, between the tertiary hollow screw and the tertiary telescopic cylinder, between the tertiary telescopic cylinder and the secondary telescopic cylinder, between the secondary telescopic cylinder and the primary telescopic cylinder, and between the primary telescopic cylinder and the fixed cylinder.

4. The multi-stage electric telescopic pipeline according to claim 1, characterized in that: A sealing ring is provided between the tertiary telescopic cylinder and the secondary telescopic cylinder, between the secondary telescopic cylinder and the primary telescopic cylinder, and between the primary telescopic cylinder and the fixed cylinder, at one end away from the driving assembly.

5. The multi-stage electric telescopic pipeline according to claim 1, characterized in that: A guide structure is provided between the tertiary telescopic cylinder and the secondary telescopic cylinder, between the secondary telescopic cylinder and the primary telescopic cylinder, and between the primary telescopic cylinder and the fixed cylinder, for providing guidance for the relative movement between the tertiary telescopic cylinder and the secondary telescopic cylinder, between the secondary telescopic cylinder and the primary telescopic cylinder, and between the primary telescopic cylinder and the fixed cylinder in the axial direction.

6. The multi-stage electric telescopic pipeline according to claim 1, characterized in that: One end of the primary hollow screw is inserted into the gear box and extends out of the gear box from the other end of the gear box, and bearings are provided between the two ends of the gear box and the gear box; The gear transmission member includes a driving gear arranged on the rotating shaft of the driving motor, a driven gear arranged on the primary hollow screw, and transmission gears respectively meshing with the driving gear and the driven gear.

7. The multi-stage electric telescopic pipeline according to claim 6, characterized in that: Bearing covers are respectively provided on the outer sides of both ends of the gear box. The bearing covers are fixedly connected to the gear box, and a sealing ring is provided between the bearing cover and the primary hollow screw.

8. The multi-stage electric telescopic pipeline according to claim 1, characterized in that: The driving motor is a driving motor with a braking function.

9. Oil receiving device, characterized in that: The multi-stage electric telescopic pipeline comprises the multi-stage electric telescopic pipeline according to any one of claims 1 to 8, wherein the end of the three-stage telescopic cylinder is provided with a bend pipe, and the other end of the bend pipe is provided with an oil receiving probe.

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