An air intake support stand

Abstract

The application relates to the technical field of aircraft air inlet maintenance equipment, in particular to an air inlet support rack, which is used to place the air inlet on the support surfaces of multiple support platforms, the profile shape of the support surfaces is matched with the outer surface shape of the supported part of the air inlet, the outer wall of the air inlet is in surface contact with the support surfaces, compared with the existing single-point or two-point support mode, the support area is large and the air inlet can be stably supported. The flexible protective mat layer laid on the top of the support surface further isolates the hard contact between the air inlet and the metal support surface, and prevents surface damage. When the air inlet needs to be transported, the support feet are switched to the recovery state, the universal wheels touch the ground, the rack can move as a whole, does not need to rely on the lifting of a travelling crane, and eliminates the risk of knocking and falling during lifting. After being moved to a designated maintenance station, the support feet are switched to the extended state, the support feet are supported on the ground and the base is lifted up, so that the universal wheels are suspended in the air, and stable support of the rack during operation is realized.

Description

Technical Field

[0001] This application relates to the field of aircraft air intake maintenance equipment technology, and in particular to an air intake support platform. Background Technology

[0002] Aircraft air intakes are thin-walled curved components, requiring specialized tooling for stable and safe support during maintenance to prevent impacts and deformation, ensuring operational accuracy and safety. Currently, aviation maintenance sites mostly use general-purpose brackets, simple support frames, or temporary assembled steel sections as support tooling, lacking specialized stands adapted to the air intake's shape.

[0003] Defects and shortcomings of existing technology: 1. Most general-purpose brackets are single-point or two-point supports, which have poor fit with the outer wall of the air intake. The stress is concentrated at the support point, which can easily cause excessive local stress, surface scratches or thin-wall deformation in the air intake.

[0004] 2. Without a wheeled moving structure, the air intake duct needs to be transported by crane, which results in low clamping and positioning efficiency, and there are safety risks of collision and falling during the hoisting process.

[0005] 3. The simple tooling structure lacks rigidity, making it prone to shaking during grinding, alignment, and other operations. It cannot provide stable support for maintenance operations, affecting the quality and efficiency of the work.

[0006] 4. The tooling lacks a standardized support platform, making it difficult to fix the attitude of the air intake during operation, and thus unable to adapt to continuous maintenance operations with multiple workstations and processes.

[0007] Therefore, how to achieve stable support for the air intake is a technical problem that needs to be solved by those skilled in the art. Utility Model Content

[0008] This application provides an air intake support platform to achieve stable support for the air intake.

[0009] To achieve the above objectives, this utility model provides the following technical solution: An air intake support frame includes a base and multiple support platforms. Each support platform is fixed to the top of the base and has a support surface for supporting the air intake. The contour shape of the support surface is adapted to the outer surface shape of the supported portion of the air intake. The frame also includes: A flexible protective padding layer is laid on top of the supporting surface; Multiple casters are mounted on the bottom of the base; Multiple support legs are installed at the bottom of the base, and the support legs have a retracted state and an extended state; In the retracted state, the casters touch the ground, allowing the air intake support frame to move; in the extended state, the support legs support the ground and lift the base, suspending the casters in the air.

[0010] Optionally, the above-mentioned intake support frame further includes a connecting frame, which includes a telescopic part and a sliding part. One end of the telescopic part is connected to the base, and the other end of the telescopic part is connected to the sliding part. The telescopic part is used to drive the sliding part to move in the vertical direction. The bottom of the support platform is connected to the top of the sliding part, and the sliding part is used to drive the support platform to move in the horizontal direction.

[0011] Optionally, in the above-mentioned intake support frame, the telescopic part includes an outer sleeve and an inner support tube. The inner support tube is slidably sleeved inside the outer sleeve. A plurality of spaced positioning holes are provided along the length direction of the inner support tube. The outer sleeve is provided with locking holes for cooperating with the positioning holes. It also includes a locking pin, which passes through the interior of the locking hole and the positioning hole.

[0012] Optionally, in the above-mentioned air intake support frame, the sliding part includes a lower sliding plate and an upper sliding plate. The lower sliding plate is fixed to the telescopic part, and the upper sliding plate is fixed to the bottom of the support platform. The upper surface of the lower sliding plate is provided with a radially extending groove, and the lower surface of the upper sliding plate is provided with a slider that slides in cooperation with the groove. A locking screw is screwed to the side wall of the lower sliding plate, and the end of the locking screw can abut against the slider to lock the upper sliding plate.

[0013] Optionally, in the above-mentioned air intake support frame, the base is a heptagonal frame, and the number of support platforms is four. The four support platforms are respectively connected to the four sides of the heptagonal frame that are arranged opposite to each other, and the center line of the four support platforms forms a square.

[0014] Optionally, in the above-mentioned air intake support frame, the heptagonal frame includes a first connecting part, a second connecting part, a third connecting part, a fourth connecting part, a fifth connecting part, a sixth connecting part, and a seventh connecting part connected in sequence, wherein the support platform is connected to the top of the first connecting part, the third connecting part, the fifth connecting part, and the seventh connecting part, and an opening is formed between the first connecting part and the seventh connecting part.

[0015] Optionally, in the above-mentioned air intake support frame, the support foot includes a vertically arranged adjusting screw and a foot fixed to the bottom end of the adjusting screw, as well as a nut fixed to the bottom of the base and threadedly engaged with the adjusting screw; the top end of the adjusting screw is provided with a radially penetrating through hole, and a radially extending force rod is inserted inside the through hole, and the adjusting screw is driven to rotate by turning the force rod.

[0016] Optionally, in the above-mentioned air intake support frame, the support leg includes a support rod hinged to the bottom of the base, the support rod being able to swing between a folded position and an unfolded position around the hinge axis; in the folded position, the support rod is folded under the bottom of the base, so that the caster touches the ground; in the unfolded position, the support rod is unfolded and supported on the ground, lifting the base and suspending the caster in the air; It also includes a locking mechanism for locking the support rod in the unfolded position or the folded position.

[0017] Optionally, in the above-mentioned air intake support frame, a snap-fit ​​boss is provided on the top side of the support surface away from the center of the air intake support frame, and the snap-fit ​​boss is used to limit the outer edge of the air intake.

[0018] Optionally, in the above-mentioned intake duct support frame, the support surface is a concave arc-shaped surface, and the radius of curvature of the arc-shaped surface is consistent with the radius of curvature of the outer wall of the intake duct.

[0019] The air intake support frame provided by this utility model allows the air intake to be placed on the support surfaces of multiple support platforms. The contour shape of the support surfaces matches the outer surface shape of the supported part of the air intake, ensuring a surface-to-surface contact between the outer wall of the air intake and the support surfaces. Compared to existing single-point or two-point support methods, this provides a larger support area and more evenly distributed stress, effectively avoiding thin-wall deformation or surface scratches caused by localized stress concentration. A flexible protective pad layer laid on top of the support surfaces further isolates the air intake from hard contact with the metal support surfaces, preventing surface damage. When the air intake needs to be moved, the support legs are switched to the retracted state, the casters touch the ground, and the frame can be moved as a whole with the components, eliminating the need for overhead cranes and the risk of collisions and falls during hoisting. After moving to the designated maintenance station, switch the support legs to the extended state. The support legs support the ground and lift the base, suspending the casters in the air. The support frame changes from the movable support of the casters to the rigid support of the support legs, eliminating the play of the casters and achieving zero displacement and no shaking of the frame during operation, providing a stable support foundation for maintenance operations such as grinding and calibration.

[0020] Therefore, this utility model solves the problems of unstable support, easy damage to the air intake, and low transfer efficiency of existing tooling by using multi-point surface bonding support, flexible protective padding, and coordinated switching between moving and rigid fixed states, thus achieving stable support for the air intake. Attached Figure Description

[0021] The accompanying drawings, incorporated in and forming part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, those skilled in the art can obtain other drawings based on these drawings without creative effort. One or more embodiments are illustrated by way of example through the corresponding images in the accompanying drawings. These exemplary descriptions do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings represent similar elements. Unless otherwise stated, the figures in the drawings do not constitute a limitation on scale.

[0022] Figure 1 This is a schematic diagram of the structure of the air intake support frame provided in the embodiments of this application.

[0023] Explanation of reference numerals in the attached figures: Base 100, support platform 200, casters 300, support feet 400, telescopic part 500, snap-fit ​​boss 600. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0025] The following disclosure provides numerous different embodiments or examples for implementing various structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, various specific examples of processes and materials are provided in this application; however, those skilled in the art will recognize the applicability of other processes and / or the use of other materials.

[0026] For ease of description, spatial relative terms may be used in the text to describe the relative position or movement of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "front," "back," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure undergoes a positional flip, orientation change, or change of motion, these directional indications will change accordingly. For instance, an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0027] See Figure 1 This application provides an air intake support frame, including a base 100 and multiple support platforms 200. The support platforms 200 are fixed to the top of the base 100 and have a support surface for supporting the air intake. The outline shape of the support surface is adapted to the outer surface shape of the supported part of the air intake. The frame also includes: a flexible protective pad layer laid on the top of the support surface; multiple casters 300 installed on the bottom of the base 100; and multiple support feet 400 installed on the bottom of the base 100. The support feet 400 have a retracted state and an extended state. In the retracted state, the casters 300 touch the ground, allowing the air intake support frame to move. In the extended state, the support feet 400 support the ground and lift the base 100, suspending the casters 300 in the air.

[0028] Specifically, the base 100 can be a rectangular or circular frame welded from steel sections; the number of support platforms 200 can be three, four, or six to accommodate the support requirements of intake ducts of different lengths; the flexible protective padding can be made of materials such as rubber pads, polyurethane pads, or felt pads; the casters 300 can be equipped with brake pedals to enhance temporary parking stability. In maintenance scenarios, operators can rely on the stable support of the platform to carry out the entire maintenance process of intake duct grinding, correction, testing, and assembly in sequence. After the work is completed, the system can be switched back to mobile mode to transport the intake duct to the storage area.

[0029] The air intake support frame provided by this utility model allows the air intake to be placed on the support surfaces of multiple support platforms 200 during use. The contour shape of the support surfaces matches the outer surface shape of the supported part of the air intake, ensuring a surface-to-surface contact between the outer wall of the air intake and the support surfaces. Compared to existing single-point or two-point support methods, this provides a larger support area and more evenly distributed stress, effectively avoiding thin-wall deformation or surface scratches caused by localized stress concentration. A flexible protective pad layer laid on top of the support surfaces further isolates the air intake from hard contact with the metal support surfaces, preventing surface damage. When the air intake needs to be moved, the support legs 400 are switched to the retracted state, the casters 300 touch the ground, and the frame can be moved as a whole with the components, eliminating the need for overhead cranes and the risk of collisions and falls during hoisting. After moving to the designated maintenance station, switch the support leg 400 to the extended state. The support leg 400 supports the ground and lifts the base 100, so that the caster wheel 300 is suspended in the air. The support of the frame changes from the movable support of the caster wheel 300 to the rigid support of the support leg 400, eliminating the movement gap of the caster wheel 300 and realizing the frame without displacement or shaking during operation, providing a stable support foundation for maintenance operations such as grinding and calibration.

[0030] Therefore, this utility model solves the problems of unstable support, easy damage to the air intake, and low transfer efficiency of existing tooling by using multi-point surface bonding support, flexible protective padding, and coordinated switching between moving and rigid fixed states, thus achieving stable support for the air intake.

[0031] To optimize the above technical solution, the intake support frame also includes a connecting frame, which includes a telescopic part 500 and a sliding part. One end of the telescopic part 500 is connected to the base 100, and the other end of the telescopic part 500 is connected to the sliding part. The telescopic part 500 is used to drive the sliding part to move in the vertical direction. The bottom of the support platform 200 is connected to the top of the sliding part, and the sliding part is used to drive the support platform 200 to move in the horizontal direction.

[0032] Specifically, when adapting to intakes of different diameters, the vertical height of the sliding part and the support platform 200 is first adjusted via the telescopic part 500. When the telescopic part 500 extends, the support platform 200 rises to accommodate larger diameter intakes; when the telescopic part 500 retracts, the support platform 200 lowers to accommodate smaller diameter intakes. After the height is adjusted, the horizontal position of the support platform 200 along the radial direction of the base 100 is adjusted via the sliding part. The sliding part moves the support platform 200 radially inward or outward, changing the distance between the support platform 200 and the center of the platform, ensuring that the contact position between the support surface and the outer wall of the intake is always in the optimal fit area. Vertical and horizontal adjustments can be performed independently, enabling flexible positioning of the support platform 200 in a two-dimensional plane. After adjustment, the telescopic part 500 and the sliding part are locked, and the support platform 200 remains in the same position during maintenance operations.

[0033] The connecting frame integrates the telescopic section 500 and the sliding section, supporting the platform 200 with two degrees of freedom of adjustment in height and radial direction. This allows the same frame to be adapted to air intakes of different diameters and specifications within the same series, significantly improving versatility, reducing the number of specialized tooling components, and lowering maintenance and support costs. Furthermore, the locking mechanism is reliable after adjustment, without affecting the overall rigidity and support stability of the frame.

[0034] Furthermore, the telescopic section 500 can be equipped with a scale, allowing operators to quickly preset the height according to the intake duct specifications, thus improving adjustment efficiency. During maintenance operations, operators can pre-adjust the positions of each support platform 200 according to the specifications of the intake duct to be repaired, and then hoist or push the intake duct into place, achieving rapid model changeover.

[0035] To optimize the above technical solution, the telescopic part 500 includes an outer sleeve and an inner support tube. The inner support tube is slidably fitted inside the outer sleeve. Multiple spaced positioning holes are provided along the length of the inner support tube. The outer sleeve is provided with locking holes for engaging with the positioning holes. It also includes a locking pin, which passes through the locking hole and the positioning hole.

[0036] To adjust the height, first pull out the locking pin to release the lock on the inner support tube and outer tube. Then, slide the inner support tube vertically to extend or retract it within the outer tube to the target height. Multiple positioning holes on the inner support tube provide several discrete positions. The operator selects the positioning hole closest to the target height, aligns it with the locking hole on the outer tube, and then inserts the locking pin. The locking pin passes through both the locking hole and the positioning hole, mechanically locking the relative positions of the inner support tube and outer tube. After maintenance, if it is necessary to readjust the height or retract the platform, simply pull out the locking pin to slide the inner support tube again.

[0037] The pin-hole locking structure replaces friction locking with mechanical limiting, offering strong load-bearing capacity and reliable locking. It prevents height retraction or positional shift under the weight of the air intake and external forces such as grinding and straightening, ensuring the support platform 200 maintains its set height throughout the operation. Furthermore, its simple structure, intuitive operation, and low maintenance costs make it suitable for demanding safety and reliability conditions in aviation maintenance environments.

[0038] Furthermore, the spacing of the positioning holes can be set to equal or non-equal spacing according to the commonly used air intake specifications; the locking pin can be a spring self-locking pin, which automatically locks after insertion to prevent accidental dislodgement; a wear-resistant bushing can be added between the outer tube and the inner support tube to reduce sliding wear, thereby extending the service life of the outer tube and the inner support tube.

[0039] To optimize the above technical solution, the sliding part includes a lower sliding plate and an upper sliding plate. The lower sliding plate is fixed to the telescopic part 500, and the upper sliding plate is fixed to the bottom of the support platform 200. The upper surface of the lower sliding plate is provided with a radially extending groove, and the lower surface of the upper sliding plate is provided with a slider that slides in cooperation with the groove. The side wall of the lower sliding plate is screwed with a locking screw, and the end of the locking screw can abut against the slider to lock the upper sliding plate.

[0040] Specifically, the relative movement of the lower and upper slide plates can adjust the position of each support platform 200 on the horizontal plane, thereby expanding or shrinking the overall support range formed by the enclosed area of ​​each support platform 200, thus adapting to air intakes of different sizes and expanding the applicability of the platform.

[0041] When adjusting the radial position, first loosen the locking screw to release its restraint on the slider. Then, push the upper slide plate radially. The slider slides smoothly under the guidance of the slide groove, causing the support platform 200 to move synchronously. The slide groove extends radially to ensure that the movement trajectory of the support platform 200 is always along the radial direction of the frame, preventing swaying. When the support platform 200 reaches the target position, tighten the locking screw. Its end abuts against the slider, and the friction between the screw end and the slider locks the upper slide plate onto the lower slide plate. The cooperation between the slide groove and the slider serves both guiding and load-bearing functions, constraining the upper slide plate in the vertical direction to ensure its stability.

[0042] The cooperation between the slide and the slider provides smooth linear guidance, preventing jamming or skew when adjusting the radial position of the support platform by 200 degrees, ensuring a smooth and controllable adjustment process. The locking screw has a simple structure and is easy to operate; sufficient tightening force can be applied using a regular wrench, ensuring that it does not loosen under heavy intake loads and vibrations during maintenance operations.

[0043] Furthermore, scale lines can be set along the slide groove on the slide plate to facilitate operators in recording and repeatedly setting the sliding position, thereby improving changeover efficiency.

[0044] To optimize the above technical solution, the base 100 is a heptagonal frame, and the number of support platforms 200 is four. The four support platforms 200 are respectively connected to the four sides of the heptagonal frame that are arranged opposite to each other, and the center line of the four support platforms 200 forms a square.

[0045] Specifically, the existing simple tooling lacks a standardized support platform 200 layout, making it difficult to fix the air intake's posture and unsuitable for continuous maintenance operations involving multiple workstations and processes. Simultaneously, the base 100 structure needs to combine openness and rigidity, facilitating air intake access while ensuring load-bearing capacity. In this solution, the heptagonal frame is constructed by connecting seven sides sequentially, forming a closed welded steel structure with high structural strength and rigidity. It can withstand external forces such as grinding and alignment, and is not easily deformed over long-term use. Support platforms 200 are installed on four opposite sides, forming four symmetrically distributed support points. The center line connecting the four support platforms 200 forms a square. After the air intake is placed, the four support points are located near the four vertices of the square, with the air intake's center of gravity falling within the square area, resulting in even force distribution and stable, reliable support. The remaining three sides of the heptagonal frame are not connected to the support platforms 200 but are used for connection and to reinforce the overall rigidity of the frame. By arranging a square four-point support layout, the air intake is subjected to symmetrical and uniform forces, with each support point receiving balanced stress, avoiding localized overload and effectively protecting the thin-walled structure of the air intake. At the same time, the overall welded frame structure has high strength and rigidity, can withstand external forces such as grinding and straightening, and is not easily deformed after long-term use, thus providing a stable and reliable foundation platform for multi-process continuous maintenance operations.

[0046] To optimize the above technical solution, the heptagonal frame includes a first connecting part, a second connecting part, a third connecting part, a fourth connecting part, a fifth connecting part, a sixth connecting part, and a seventh connecting part connected in sequence. The top of the first connecting part, the third connecting part, the fifth connecting part, and the seventh connecting part are connected to a support platform 200, and an opening is formed between the first connecting part and the seventh connecting part.

[0047] Specifically, no connecting piece is provided between the first connecting part and the seventh connecting part, naturally forming an opening for the air intake to be moved in or out horizontally from this side. When the air intake is moved in, the operator pushes the air intake horizontally from the opening side, aligning the supported part of the air intake with the support surfaces of the four support platforms 200, and then smoothly places the air intake onto the support surfaces. The support platforms 200 are respectively connected to the first connecting part, the third connecting part, the fifth connecting part, and the seventh connecting part. These four sides are arranged opposite each other in the heptagonal frame to ensure that the four support points are symmetrically distributed after the air intake is placed.

[0048] The open design allows the air intake to be moved horizontally in and out from the side of the test bench, eliminating the need for overhead hoisting. This reduces the requirements for hoisting equipment and operating space, making operation more convenient and safer. The absence of obstructions at the opening creates an unobstructed passage, minimizing the possibility of collisions between the air intake and the test bench during operation. Furthermore, the open design does not compromise the overall rigidity of the heptagonal frame; the rest of the frame remains a closed welded structure, ensuring unaffected load-bearing capacity.

[0049] Furthermore, chamfers or rounded transitions can be provided at the ends of the first and seventh connecting parts on both sides of the opening to prevent sharp corners from scratching the surface of the air intake. When the platform is not in use, a removable protective crossbar can be installed at the opening to further enhance the rigidity and safety of the frame.

[0050] The support leg 400 has a retracted state and an extended state. The following are two embodiments of the support leg 400: In the first embodiment, the support foot 400 includes a vertically arranged adjusting screw and a foot seat fixed to the bottom end of the adjusting screw, as well as a nut fixed to the bottom of the base 100 and threadedly engaged with the adjusting screw; the top end of the adjusting screw is provided with a radially penetrating through hole, and a radially extending force rod is inserted inside the through hole, and the adjusting screw is driven to rotate by turning the force rod.

[0051] When adjusting the support foot 400, the operator inserts the lever into the radial through hole at the top of the adjusting screw and turns the lever to drive the adjusting screw to rotate within the nut. Since the bottom end of the adjusting screw is fixed to the foot, the foot rotates synchronously with the adjusting screw. When the foot is not in contact with the ground, it rotates freely in the air without frictional resistance, making adjustment easy and quick. When the foot descends close to the ground, the rotation speed can be reduced, allowing the foot to smoothly touch the ground during slow rotation. After the foot touches the ground, continue rotating the adjusting screw. Sliding friction exists between the bottom surface of the foot and the ground. At this point, with the increased torque provided by the lever, the operator can still overcome this friction to complete the final lifting stroke until the caster 300 is suspended in the air and the platform is stable.

[0052] Furthermore, as a further improvement to the above embodiment, a rotating connection structure can be added between the bottom end of the adjusting screw and the foot, so that the foot can rotate freely relative to the adjusting screw, while the axial lifting and lowering motion of the adjusting screw is still transmitted to the foot.

[0053] In one specific embodiment, the rotating connection structure includes a connecting sleeve disposed on the top of the foot and an annular groove disposed on the bottom of the adjusting screw. The inner wall of the connecting sleeve is provided with an annular flange that mates with the annular groove. The annular flange engages with the annular groove, so that the adjusting screw and the foot are linked axially and can rotate freely relative to each other in the circumferential direction. During assembly, after the annular flange is engaged with the annular groove, when the adjusting screw rotates, its rotational motion is no longer transmitted to the foot; only the axial lifting motion is transmitted to the foot, so that the foot remains stationary after contacting the ground.

[0054] In another specific embodiment, the rotating connection structure is a thrust ball bearing. The upper ring of the thrust ball bearing is fixedly connected to the bottom end of the adjusting screw, and the lower ring of the thrust ball bearing is fixedly connected to the top surface of the foot. When the adjusting screw rotates, the thrust ball bearing isolates the rotational movement of the adjusting screw from the foot, and at the same time transmits the axial thrust of the adjusting screw to the foot through the balls, so that the foot only moves axially up and down without rotating with it.

[0055] Throughout the adjustment process, the footrest stops rotating after touching the ground, completely eliminating rotational friction between the footrest and the ground. This protects the ground, reduces operating resistance, and makes operation easier and smoother, making it suitable for long-term and frequent use in aircraft maintenance workshops.

[0056] In embodiment two, the support foot 400 includes a support rod hinged to the bottom of the base 100. The support rod can swing between a folded position and an unfolded position around the hinge axis. In the folded position, the support rod is folded under the bottom of the base 100, so that the caster wheel 300 touches the ground. In the unfolded position, the support rod is unfolded and supported on the ground, lifting the base 100 and suspending the caster wheel 300. It also includes a locking mechanism for locking the support rod in the unfolded position or the folded position.

[0057] Specifically, when switching the platform from a mobile to a fixed state, the operator releases the locking mechanism and swings the support rod downwards from the folded position to the unfolded position around the hinge axis. In the unfolded position, the bottom end of the support rod contacts the ground and supports the weight of the platform. As the support rod swings past the vertical position to the designed unfolding angle, the platform is lifted, and the casters 300 are suspended in the air. At this time, the locking mechanism locks the support rod in the unfolded position to prevent it from accidentally swinging back during operation. When moving the platform, the locking mechanism is released, and the support rod is swung upwards back to the folded position, folding under the bottom of the base 100. The casters 300 touch the ground again, and the locking mechanism locks the support rod in the folded position to prevent it from falling off during movement. The folding support feet 400 are quick to operate; simply swinging the support rod and locking it completes the state switch without rotating the screw multiple times. This is particularly suitable for multi-station maintenance operations that require frequent switching between mobile and fixed states. The hinged linkage structure has high load-bearing capacity and stable support, while the double locking mechanism ensures operational safety.

[0058] Furthermore, the locking mechanism can be a spring pin or a hook-type lock, which automatically engages with the corresponding hole or slot when the support rod reaches the unfolded or folded position, making operation simple and locking reliable. The number of support rods can correspond to the number of support platforms 200, and the arrangement of the support rods in the vertical direction can correspond to the arrangement of the support platforms 200. Adjustable height feet can be provided at the bottom of the support rods to finely adjust the support height to adapt to uneven ground.

[0059] To optimize the above technical solution, a snap-fit ​​boss 600 is provided on the top side of the support surface away from the center of the air intake support frame. The snap-fit ​​boss 600 is used to limit the outer edge of the air intake.

[0060] Specifically, after the air intake is placed on the support surface, it may be subjected to lateral forces during maintenance operations such as grinding and alignment. In order to ensure the stability of the support for the air intake and to facilitate the quick positioning of the initial placement position of the air intake on the support surface, a snap-fit ​​boss 600 is provided.

[0061] When the air intake is placed on the support platform 200, the operator abuts the outer edge of the air intake against the inner side of the locking boss 600. The locking boss 600 is located on the side of the support surface away from the center of the platform, i.e., the outer edge of the support surface. After the outer edge of the air intake contacts the locking boss 600, the locking boss 600 forms a horizontal constraint on the air intake, preventing it from sliding outward. During maintenance operations such as grinding and alignment, even if subjected to outward lateral forces, the air intake will not detach from the support surface due to the obstruction of the locking boss 600. The locking boss 600 also serves as a positioning reference; the operator can quickly complete the positioning by aligning the outer edge of the air intake with the boss each time it is placed. The locking boss 600, with its simple protruding structure, achieves lateral restraint and rapid positioning of the air intake, significantly improving the safety of the air intake on the support platform 200 without adding any additional operating steps, and preventing the air intake from slipping and falling off due to accidental lateral forces. Meanwhile, the snap-fit ​​boss 600 can help operators quickly locate the air intake, reduce adjustment time, and improve clamping efficiency.

[0062] Furthermore, the inner side of the snap-fit ​​boss 600 can be provided with an arc or bevel that matches the shape of the outer edge of the air intake, increasing the contact area and reducing the contact stress. The surface of the snap-fit ​​boss 600 can also be covered with a flexible material to prevent scratching the air intake.

[0063] To optimize the above technical solution, the support surface is a concave arc surface, and the radius of curvature of the arc surface is consistent with the radius of curvature of the outer wall of the air intake.

[0064] The support surface is machined into a concave arc shape, curving towards the center of the support frame to form a saddle-like supporting surface. The radius of curvature of this arc surface is the same as or close to the radius of curvature of the outer wall of the air intake to be supported. When the air intake is placed on the support surface, the curved surface of the air intake's outer wall and the arc surface of the support surface fit together over a large area, forming surface contact support. The weight of the air intake and the external force of maintenance operations are evenly distributed to the support platform 200 and the base 100 through the surface contact area, avoiding local pressure concentration. A flexible protective pad is laid on the arc-shaped support surface, curving with the support surface to further fill the tiny gaps and achieve a more uniform contact pressure distribution.

[0065] Furthermore, the flexible protective pad is fixed to the support surface by a detachable connection structure, which can be a bolt connection or a Velcro connection, so that the flexible protective pad can be replaced according to the intake duct specifications or wear condition.

[0066] It should be noted that the air intake support stand provided by this utility model can be used in the field of aircraft air intake maintenance equipment technology or other fields. Other fields refer to any field other than the field of aircraft air intake maintenance equipment technology. The above is merely an example and does not limit the application field of the air intake support stand provided by this utility model.

[0067] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0068] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0069] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. An air intake support frame, characterized in that, The system includes a base and multiple support platforms, each support platform being fixed to the top of the base. Each support platform has a support surface for supporting the air intake duct, the contour shape of which is adapted to the outer surface shape of the supported portion of the air intake duct. It also includes: A flexible protective padding layer is laid on top of the supporting surface; Multiple casters are mounted on the bottom of the base; Multiple support legs are installed at the bottom of the base, and the support legs have a retracted state and an extended state; In the retracted state, the casters touch the ground, allowing the air intake support frame to move; in the extended state, the support legs support the ground and lift the base, suspending the casters in the air.

2. The intake duct support frame according to claim 1, characterized in that, It also includes a connecting frame, which includes a telescopic part and a sliding part. One end of the telescopic part is connected to the base, and the other end of the telescopic part is connected to the sliding part. The telescopic part is used to drive the sliding part to move in the vertical direction. The bottom of the support platform is connected to the top of the sliding part, and the sliding part is used to drive the support platform to move in the horizontal direction.

3. The intake duct support frame according to claim 2, characterized in that, The telescopic part includes an outer sleeve and an inner support tube. The inner support tube is slidably fitted inside the outer sleeve. Multiple positioning holes are provided along the length of the inner support tube at intervals. The outer sleeve is provided with locking holes for engaging with the positioning holes. It also includes a locking pin, which passes through the interior of the locking hole and the positioning hole.

4. The intake duct support frame according to claim 2, characterized in that, The sliding part includes a lower sliding plate and an upper sliding plate. The lower sliding plate is fixed to the telescopic part, and the upper sliding plate is fixed to the bottom of the support platform. The upper surface of the lower sliding plate is provided with a radially extending groove, and the lower surface of the upper sliding plate is provided with a slider that slides in cooperation with the groove. A locking screw is screwed to the side wall of the lower sliding plate, and the end of the locking screw can abut against the slider to lock the upper sliding plate.

5. The intake duct support frame according to claim 1, characterized in that, The base is a heptagonal frame, and there are four support platforms. The four support platforms are respectively connected to the four opposite sides of the heptagonal frame, and the center line of the four support platforms forms a square.

6. The intake duct support frame according to claim 5, characterized in that, The heptagonal frame includes a first connecting part, a second connecting part, a third connecting part, a fourth connecting part, a fifth connecting part, a sixth connecting part, and a seventh connecting part connected in sequence. The support platform is connected to the top of the first connecting part, the third connecting part, the fifth connecting part, and the seventh connecting part, and an opening is formed between the first connecting part and the seventh connecting part.

7. The intake duct support frame according to any one of claims 1 to 6, characterized in that, The support foot includes a vertically arranged adjusting screw and a foot seat fixed to the bottom end of the adjusting screw, as well as a nut fixed to the bottom of the base and threadedly engaged with the adjusting screw; the top end of the adjusting screw is provided with a radially penetrating through hole, and a radially extending force rod is inserted inside the through hole, and the adjusting screw is driven to rotate by turning the force rod.

8. The intake duct support frame according to any one of claims 1 to 6, characterized in that, The support foot includes a support rod hinged to the bottom of the base, the support rod being able to swing between a folded position and an unfolded position about a hinge axis; in the folded position, the support rod is folded under the bottom of the base, so that the caster wheel touches the ground; In the unfolded position, the support rod unfolds and supports the ground, lifting the base and suspending the casters in the air; It also includes a locking mechanism for locking the support rod in the unfolded position or the folded position.

9. The intake duct support frame according to any one of claims 1 to 6, characterized in that, The top of the support surface is provided with a snap-fit ​​protrusion on the side away from the center of the air intake support frame. The snap-fit ​​protrusion is used to limit the outer edge of the air intake.

10. The intake duct support frame according to any one of claims 1 to 6, characterized in that, The support surface is a concave arc-shaped surface, and the radius of curvature of the arc-shaped surface is consistent with the radius of curvature of the outer wall of the air intake.

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