Self-leveling device of airplane hydraulic jack

Abstract

The utility model relates to the technical field of jacks, in particular to a self-leveling device of an airplane hydraulic jack, which comprises an airplane hydraulic jack body, a fixing sleeve is arranged on the outer wall of the airplane hydraulic jack body and close to the top, and an arc-shaped self-adaptive adjusting block is arranged on the outer wall of the fixing sleeve. A supporting frame is arranged on the outer side of the arc-shaped self-adaptive adjusting block, the supporting frame comprises an annular sleeve block, an arc-shaped connecting groove allowing the arc-shaped self-adaptive adjusting block to be rotationally connected is formed in the inner wall of the annular sleeve block, and four fixing assemblies distributed in an annular array are arranged on the outer wall of the annular sleeve block. According to the self-leveling device of the airplane hydraulic jack, through cooperation of the arc-shaped self-adaptive adjusting block and the arc-shaped connecting groove, the airplane hydraulic jack body can be adjusted to be in a vertical state in a self-adaptive mode on the uneven ground, the situation that the telescopic rod is bent or a hydraulic system fails due to inclination is effectively avoided, and potential safety hazards in maintenance operation are greatly reduced.

Description

Technical Field

[0001] This utility model relates to the field of jack technology, specifically to a self-leveling device for aircraft hydraulic jacks. Background Technology

[0002] Aircraft hydraulic jacks are specialized devices used for aircraft maintenance and repair. Their primary function is to provide strong support force through a hydraulic system to ensure stability during aircraft maintenance. The jack's support system typically consists of a support plate, support cylinder, and tie rod, effectively distributing loads and providing excellent stability. This equipment is widely used in aviation maintenance, not only improving work efficiency but also ensuring the personal safety of professionals during repairs.

[0003] Patent CN206970100U discloses an aircraft hydraulic jack, which includes a hydraulic system and at least three support systems mounted on the hydraulic system. The hydraulic system includes a hydraulic cylinder, a push rod and a filler / vent port mounted on the hydraulic cylinder, and a manual pump connected to the hydraulic cylinder. Each support system includes a support plate, a support cylinder and a tie rod movably connected to the support plate, and a wheel assembly connected to the support cylinder. The other end of each support cylinder is connected to an upper bracket mounted on the hydraulic cylinder, and the other end of each tie rod is connected to a lower bracket mounted on the hydraulic cylinder. This invention offers high stability, good support effect, ease of use, and simple operation.

[0004] The aforementioned existing technology improves stability through at least three sets of support systems, enabling it to exhibit good support performance when bearing heavy loads. However, a significant problem remains: when using aircraft hydraulic jacks on uneven ground, it is impossible to ensure their vertical position. If the contact surface between the jack and the ground itself has an angle, conventionally designed jacks cannot adjust the angle, which may lead to bending of the telescopic rod and consequently, a safety accident. Against this backdrop, proposing a self-leveling device for aircraft hydraulic jacks is particularly important. This device can automatically adjust the angle of the jack, thereby ensuring its stable vertical position, improving safety, and reducing potential risks during maintenance. Utility Model Content

[0005] The purpose of this invention is to provide a self-leveling device for aircraft hydraulic jacks to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] The self-leveling device of the aircraft hydraulic jack includes the aircraft hydraulic jack body, which serves as the core support component and adaptively adjusts to a vertical position for lifting the aircraft. The outer wall of the aircraft hydraulic jack body is provided with a fixed sleeve near the top. The outer wall of the fixed sleeve is provided with an arc-shaped adaptive adjustment block. The arc-shaped adaptive adjustment block achieves adaptive angle adjustment of the aircraft hydraulic jack body by rotation.

[0008] The outer side of the arc-shaped adaptive adjustment block is provided with a support frame, which provides a basic support frame for the self-leveling device. The support frame includes an annular sleeve block, which is used to accommodate the arc-shaped adaptive adjustment block and limit its rotation range. The inner wall of the annular sleeve block is provided with an arc-shaped connecting groove for the arc-shaped adaptive adjustment block to rotate. The arc-shaped connecting groove serves as a sliding track for the arc-shaped adaptive adjustment block, ensuring its rotational freedom. Under its own weight, the aircraft hydraulic jack body adaptively adjusts to a vertical state, and the arc-shaped adaptive adjustment block rotates within the arc-shaped connecting groove.

[0009] The outer wall of the annular sleeve is provided with four fixing components arranged in a circular array. The fixing components are used to lock the position of the arc-shaped adaptive adjustment block to prevent displacement after adjustment. The fixing components include a U-shaped seat fixedly connected to the outer wall of the annular sleeve. The U-shaped seat is connected to the outer wall of the annular sleeve by bolts. The U-shaped seat provides a mounting base for the first hydraulic cylinder. The first hydraulic cylinder is provided on the outside of the U-shaped seat. The first hydraulic cylinder moves the extrusion block by hydraulic power to achieve the fixing function. The end of the movable rod of the first hydraulic cylinder is provided with an extrusion block for fixing the position of the arc-shaped adaptive adjustment block. The extrusion block fits the arc-shaped adaptive adjustment block through the arc groove and applies uniform pressure.

[0010] The outer wall of the annular sleeve is provided with four fixed protrusions arranged in a circular array. The fixed protrusions are used to connect the support rods and transmit the support force. The bottom of each of the four fixed protrusions is provided with a support rod at an incline. The support rods are inclined to distribute the load and enhance the stability of the support frame.

[0011] Preferably, the outer wall of the annular sleeve has a circular channel for the extrusion block to pass through. The circular channel provides a moving path for the extrusion block, ensuring that it accurately contacts the arc-shaped adaptive adjustment block. The side of the extrusion block near the arc-shaped adaptive adjustment block has an arc-shaped groove. The arc-shaped groove is used to adapt to the curved shape of the arc-shaped adaptive adjustment block, increasing the contact area. A rubber pad is adhered in the arc-shaped groove. The rubber pad is used to increase friction and avoid wear caused by direct contact between the extrusion block and the arc-shaped adaptive adjustment block.

[0012] Preferably, the bottom of the aircraft hydraulic jack body is provided with an auxiliary support component. The auxiliary support component provides auxiliary support to the aircraft hydraulic jack body after it is adjusted to a vertical position, thereby further improving the stability of the aircraft hydraulic jack body during operation. The auxiliary support component includes a second hydraulic cylinder, which is bolted to the bottom of the aircraft hydraulic jack body. The second hydraulic cylinder adjusts the height of the support base block by hydraulic extension and retraction to adapt to uneven ground.

[0013] Preferably, the end of the movable rod of the second hydraulic cylinder is provided with a spherical connecting block. The spherical connecting block allows the support base block to rotate at multiple angles to adapt to complex ground conditions. The outer side of the spherical connecting block is rotatably connected to the support base block, and the support base block contacts the ground through a second anti-slip pad to distribute the load.

[0014] Preferably, the bottom of the support block is provided with a second anti-slip pad, which is bonded to the support block. The second anti-slip pad is used to prevent the support block from sliding and to increase the coefficient of friction with the ground.

[0015] Preferably, the support frame further includes an annular base plate, which serves as the bottom base of the support frame and contacts the ground through a first anti-slip pad. The annular base plate is located directly below the annular sleeve block. The outer wall of the annular base plate is provided with four connecting horizontal plates arranged in a circular array. The bottom of the support rod is welded to the top of the connecting horizontal plates. The connecting horizontal plates are used to connect the support rod and enhance the structural strength of the support frame.

[0016] Preferably, the bottom of both the annular base plate and the connecting cross plate is bonded with a first anti-slip pad, which is used to prevent the support frame from sliding and ensure the overall stability of the device.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. The self-leveling device of the aircraft hydraulic jack, through the cooperation of the arc-shaped adaptive adjustment block and the arc-shaped connecting groove, enables the aircraft hydraulic jack body to adaptively adjust to a vertical state on uneven ground, effectively avoiding bending of the telescopic rod or failure of the hydraulic system due to tilting, and greatly reducing safety hazards in maintenance operations.

[0019] 2. The self-leveling device of the aircraft hydraulic jack has a hydraulic cylinder in the fixed component that drives the squeezing block to apply uniform pressure to the arc-shaped adaptive adjustment block. Combined with the anti-slip buffering effect of the rubber pad, it ensures that the jack position is firmly locked after leveling, preventing displacement caused by load changes or vibrations and ensuring the stability of the aircraft support.

[0020] 3. The self-leveling device of the aircraft hydraulic jack, with auxiliary support components that can be adjusted at multiple angles through the extension and retraction of hydraulic cylinders and spherical connecting blocks, can provide auxiliary support for complex ground conditions. Combined with the high friction characteristics of the first and second anti-slip pads, it further disperses the load and prevents the device from sliding. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall first-view structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the overall second-view structure of this utility model;

[0023] Figure 3 This is a schematic diagram of the support frame structure in this utility model;

[0024] Figure 4 This is one of the partial structural schematic diagrams of this utility model;

[0025] Figure 5 This is the second partial structural schematic diagram of the present utility model;

[0026] Figure 6 This is a schematic diagram of the assembly structure of the annular sleeve and the fixing component in this utility model;

[0027] Figure 7 This is a schematic diagram of the auxiliary support structure in this utility model;

[0028] In the diagram: 1. Aircraft hydraulic jack body; 2. Fixing sleeve; 20. Arc-shaped adaptive adjustment block; 3. Support frame; 30. Annular sleeve block; 300. Arc-shaped connecting groove; 301. Circular channel; 31. Fixing protrusion; 32. Support rod; 33. Annular base plate; 34. Connecting cross plate; 35. First anti-slip pad; 4. Fixing component; 40. U-shaped seat; 41. First hydraulic cylinder; 42. Extrusion block; 43. Rubber pad; 5. Auxiliary support component; 50. Second hydraulic cylinder; 51. Spherical connecting block; 52. Support base block; 53. Second anti-slip pad. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component 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.

[0031] Please see Figures 1-7 This utility model provides a technical solution:

[0032] The self-leveling device of the aircraft hydraulic jack includes the aircraft hydraulic jack body 1. The aircraft hydraulic jack body 1 serves as the core support component, adaptively adjusting to a vertical state and used to lift the aircraft. The outer wall of the aircraft hydraulic jack body 1 and near the top is provided with a fixing sleeve 2. The outer wall of the fixing sleeve 2 is provided with an arc-shaped adaptive adjustment block 20. The arc-shaped adaptive adjustment block 20 achieves adaptive angle adjustment of the aircraft hydraulic jack body 1 by rotation.

[0033] A support frame 3 is provided on the outer side of the arc-shaped adaptive adjustment block 20. The support frame 3 provides a basic support frame for the self-leveling device. The support frame 3 includes an annular sleeve 30, which is used to accommodate the arc-shaped adaptive adjustment block 20 and limit its rotation range. The inner wall of the annular sleeve 30 is provided with an arc-shaped connecting groove 300 for the arc-shaped adaptive adjustment block 20 to rotate. The arc-shaped connecting groove 300 serves as a sliding track for the arc-shaped adaptive adjustment block 20 to ensure its rotational freedom. The aircraft hydraulic jack body 1 adaptively adjusts to a vertical state under its own weight, and the arc-shaped adaptive adjustment block 20 rotates within the arc-shaped connecting groove 300.

[0034] The outer wall of the annular sleeve block 30 is provided with four fixing components 4 arranged in a circular array. The fixing components 4 are used to lock the position of the arc-shaped adaptive adjustment block 20 to prevent displacement after adjustment. The fixing components 4 include a U-shaped seat 40 fixedly connected to the outer wall of the annular sleeve block 30. The U-shaped seat 40 is connected to the outer wall of the annular sleeve block 30 by bolts. The U-shaped seat 40 provides a mounting base for the first hydraulic cylinder 41. The first hydraulic cylinder 41 is provided on the outside of the U-shaped seat 40. The first hydraulic cylinder 41 moves the extrusion block 42 by hydraulic drive to achieve the fixing function. The end of the movable rod of the first hydraulic cylinder 41 is provided with an extrusion block 42 for fixing the position of the arc-shaped adaptive adjustment block 20. The extrusion block 42 fits the arc-shaped adaptive adjustment block 20 through the arc groove and applies uniform pressure.

[0035] The outer wall of the annular sleeve block 30 is provided with four fixed protrusions 31 arranged in a ring array. The fixed protrusions 31 are used to connect the support rod 32 and transmit the support force. The bottom of each of the four fixed protrusions 31 is provided with a support rod 32 at an angle. The support rod 32 is set at an angle to distribute the load and enhance the stability of the support frame 3.

[0036] In this embodiment, the outer wall of the annular sleeve 30 is provided with a circular channel 301 for the extrusion block 42 to pass through. The circular channel 301 provides a moving path for the extrusion block 42, ensuring that it accurately contacts the arc-shaped adaptive adjustment block 20. An arc-shaped groove is provided on the side of the extrusion block 42 near the arc-shaped adaptive adjustment block 20. The arc-shaped groove is used to adapt to the curved shape of the arc-shaped adaptive adjustment block 20, increase the contact area, and a rubber pad 43 is adhered in the arc-shaped groove. The rubber pad 43 is used to increase friction and avoid wear caused by direct contact between the extrusion block 42 and the arc-shaped adaptive adjustment block 20.

[0037] Specifically, the bottom of the aircraft hydraulic jack body 1 is provided with an auxiliary support component 5. The auxiliary support component 5 provides auxiliary support for the aircraft hydraulic jack body 1 after it is adjusted to a vertical position, further improving the stability of the aircraft hydraulic jack body 1 during operation. The auxiliary support component 5 includes a second hydraulic cylinder 50. The aircraft hydraulic jack body 1, the first hydraulic cylinder 41 and the second hydraulic cylinder 50 are all externally connected to a hydraulic drive system. The second hydraulic cylinder 50 is installed at the bottom of the aircraft hydraulic jack body 1 by bolts. The second hydraulic cylinder 50 adjusts the height of the support base block 52 by hydraulic extension and retraction to adapt to uneven ground.

[0038] Furthermore, the end of the movable rod of the second hydraulic cylinder 50 is provided with a spherical connecting block 51. The spherical connecting block 51 allows the support base block 52 to rotate at multiple angles to adapt to complex ground conditions. The support base block 52 is rotatably connected to the outside of the spherical connecting block 51. The support base block 52 contacts the ground through the second anti-slip pad 53 to distribute the load.

[0039] Furthermore, a second anti-slip pad 53 is provided at the bottom of the support block 52. The second anti-slip pad 53 is bonded to the support block 52 and is used to prevent the support block 52 from sliding and to increase the coefficient of friction with the ground.

[0040] Furthermore, the support frame 3 also includes an annular base plate 33, which serves as the bottom base of the support frame 3 and contacts the ground through the first anti-slip pad 35. The annular base plate 33 is located directly below the annular sleeve block 30. The outer wall of the annular base plate 33 is provided with four connecting horizontal plates 34 arranged in a circular array. The bottom of the support rod 32 is welded to the top of the connecting horizontal plates 34. The connecting horizontal plates 34 are used to connect the support rod 32 and enhance the structural strength of the support frame 3.

[0041] Furthermore, the bottom of both the annular base plate 33 and the connecting cross plate 34 are bonded with a first anti-slip pad 35, which is used to prevent the support frame 3 from sliding and to ensure the overall stability of the device.

[0042] In this embodiment, when using the self-leveling device of the aircraft hydraulic jack, the operator moves the aircraft hydraulic jack body 1 to the work area. First, the device is initially fixed in position by contacting the ground through the annular base plate 33 of the support frame 3 and the first anti-slip pad 35 at the bottom of the connecting horizontal plate 34. Then, under the action of gravity, the aircraft hydraulic jack body 1 drives the arc-shaped adaptive adjustment block 20 on the fixed sleeve 2 to rotate along the arc-shaped connecting groove 300 on the inner wall of the annular sleeve block 30 of the support frame 3, adaptively adjusting to a vertical state. After leveling is completed, the operator controls the first hydraulic cylinder 41 on the U-shaped seat 40 in the fixed assembly 4 to drive the pressing block 42 through the ring. The circular channel 301 of the sleeve block 30 allows the arc-shaped groove of the extrusion block 42 to fit against the surface of the arc-shaped adaptive adjustment block 20, while the rubber pad 43 increases the friction to lock the position; then the second hydraulic cylinder 50 of the auxiliary support 5 is activated, and the tilt angle of the support base block 52 is adjusted through the spherical connecting block 51, so that the second anti-slip pad 53 at the bottom of the support base block 52 fits against the ground to provide auxiliary support; finally, the hydraulic system of the aircraft hydraulic jack body 1 is operated to lift the aircraft for maintenance work; during disassembly, the second hydraulic cylinder 50 and the first hydraulic cylinder 41 are retracted in reverse order, and the device is removed after the constraints of the fixing component 4 and the auxiliary support 5 are released.

[0043] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. Self-leveling device for an aircraft hydraulic jack, comprising an aircraft hydraulic jack body (1), characterized in that: The outer wall of the aircraft hydraulic jack body (1) is provided with a fixed sleeve (2) near the top, the outer wall of the fixed sleeve (2) is provided with a circular arc self-adaptive adjusting block (20), the outer side of the circular arc self-adaptive adjusting block (20) is provided with a support frame (3), the support frame (3) comprises an annular sleeve block (30), the inner wall of the annular sleeve block (30) is provided with an arc-shaped connecting groove (300) for rotating connection of the circular arc self-adaptive adjusting block (20), the outer wall of the annular sleeve block (30) is provided with four fixed assemblies (4) arranged in a ring array, the fixed assembly (4) comprises a U-shaped seat (40) fixedly connected to the outer wall of the annular sleeve block (30), the outer side of the U-shaped seat (40) is provided with a first hydraulic cylinder (41), the end of the movable rod of the first hydraulic cylinder (41) is provided with an extrusion block (42) for fixing the position of the circular arc self-adaptive adjusting block (20), the outer wall of the annular sleeve block (30) is provided with four fixed protrusions (31) arranged in a ring array, and the bottom of each of the four fixed protrusions (31) is inclined and provided with a support rod (32).

2. The self-leveling device for an aircraft hydraulic jack according to claim 1, characterized in that: The outer wall of the annular sleeve block (30) is provided with a circular channel (301) for the extrusion block (42) to pass through, one side of the extrusion block (42) close to the circular arc self-adaptive adjusting block (20) is provided with an arc-shaped groove, and a rubber pad (43) is bonded in the arc-shaped groove.

3. The self-leveling device for an aircraft hydraulic jack according to claim 1, characterized in that: The bottom of the aircraft hydraulic jack body (1) is provided with an auxiliary support (5), the auxiliary support (5) comprises a second hydraulic cylinder (50), and the second hydraulic cylinder (50) is installed at the bottom of the aircraft hydraulic jack body (1) through bolts.

4. The self-leveling device for an aircraft hydraulic jack according to claim 3, characterized in that: The end of the movable rod of the second hydraulic cylinder (50) is provided with a spherical connecting block (51), and the outer side of the spherical connecting block (51) is rotatably connected with a support bottom block (52).

5. The self-leveling device for an aircraft hydraulic jack according to claim 4, characterized in that: The bottom of the support bottom block (52) is provided with a second anti-skid pad (53), and the second anti-skid pad (53) is bonded with the support bottom block (52).

6. The self-leveling device for an aircraft hydraulic jack of claim 1, wherein: The support frame (3) further comprises an annular bottom plate (33), the annular bottom plate (33) is located directly below the annular sleeve block (30), the outer wall of the annular bottom plate (33) is provided with four connecting cross plates (34) arranged in a ring array, and the bottom of the support rod (32) is welded to the top of the connecting cross plate (34).

7. The self-leveling device for an aircraft hydraulic jack according to claim 6, characterized in that: The bottom of the annular bottom plate (33) and the connecting cross plate (34) is bonded with a first anti-skid pad (35).

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