A maintenance dock column for aircraft maintenance

Abstract

The utility model relates to the technical field of maintenance dock, concretely is a kind of maintenance dock stand for aircraft maintenance, including fixed subassembly and sliding subassembly, the sliding subassembly is located in fixed subassembly top inside, and can slide up and down along fixed subassembly, the fixed subassembly bottom is equipped with the power component of driving sliding subassembly to slide up and down, the power component has self-locking function, for maintaining sliding subassembly at fixed height. The application passes through adopting turbine worm mechanism as the core of power transmission, utilizes its inherent reverse self-locking characteristic, so that when motor stops working, the load exerted on inner column and work platform cannot reverse drive worm, thereby cutting off the path of power reverse transmission, effectively prevent the accidental contraction of stand or platform drop in bearing state, reliably lock stand at required height, greatly improve the security of equipment.

Description

Technical Field

[0001] This utility model relates to the field of maintenance dock technology, and in particular to a maintenance dock column for aircraft maintenance. Background Technology

[0002] In aircraft maintenance, the maintenance dock is a critical piece of equipment ensuring the smooth operation of maintenance work. Its core component—the maintenance dock support column—supports the work platform to a suitable height, allowing maintenance personnel to access different parts of the aircraft. Traditional maintenance dock supports often employ hydraulic lifting or motor-driven screw-lifting mechanisms. Hydraulic lifting suffers from problems such as oil leaks, high maintenance costs, and stability affected by temperature. While ordinary motor-screw mechanisms overcome some of the drawbacks of hydraulic systems, under load, especially in the event of a power outage or when the motor stops working, the reverse drive of the transmission mechanism (i.e., "reverse transmission") can cause the platform to fall, posing a significant safety hazard. Furthermore, maintenance sites often require flexible adjustments to the column layout based on the aircraft model and the maintenance location. This necessitates that the column not only provide stable support but also allow for easy movement and rapid positioning.

[0003] Therefore, there is an urgent need in the field for a maintenance dock support column that can provide stable lifting and lowering functions, possess reliable self-locking capabilities to ensure safety, and has an overall structure that is easy to move and deploy. Based on this, the core technical problem that this application aims to solve is: how to provide an aircraft maintenance dock support column that is stable during lifting and lowering, can reliably self-lock at any position, and is easy to move and position. Utility Model Content

[0004] The main objective of this invention is to provide a maintenance dock support column for aircraft maintenance, in order to solve the problems raised in related technologies.

[0005] To achieve the above objectives, according to one aspect of the present invention, a maintenance dock column for aircraft maintenance is provided, comprising a fixed component and a sliding component. The sliding component is disposed inside the top of the fixed component and can slide up and down along the fixed component. The bottom of the fixed component is provided with a power component for driving the sliding component to slide up and down. The power component has a self-locking function for maintaining the sliding component at a fixed height. The bottom of the outer side of the fixed component is provided with a plurality of support parts for supporting the maintenance dock column on the ground.

[0006] Furthermore, the fixing component includes a hollow outer column and a mounting shell fixed at the bottom end of the outer column, the mounting shell being used to install the power component.

[0007] Furthermore, a retaining ring is fixedly provided on the inner ring of the top of the outer column, and several receiving grooves are provided at the bottom to accommodate the support. A retaining plate is provided below the receiving grooves, and the retaining plate is fixedly connected to the outer column.

[0008] Furthermore, the support includes a Z-shaped support plate, one end of which is fixedly provided with a locking block, and a connecting plate is fixedly provided at the connection between the support plate and the locking block. The connecting plate is provided with several horizontal holes and several vertical limiting grooves.

[0009] Furthermore, a limiting post is slidably provided in the limiting groove, a ball is rotatably provided at the bottom end of the limiting post, and a pull rod and a spring are fixedly provided at the top end, with the spring sleeved on the outer ring of the pull rod.

[0010] Furthermore, the sliding assembly includes an inner column, with a protruding ring fixed at the top and a threaded hole at the bottom.

[0011] Furthermore, the power assembly includes a threaded rod and a drive unit, the drive unit being used to drive the threaded rod to rotate.

[0012] Furthermore, the drive unit includes a turbine and a worm gear that mesh with each other, the center of the turbine is fixedly connected to a threaded rod, and the end of the worm gear is provided with a motor that drives its rotation.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. This application adopts a worm gear mechanism as the core of power transmission. By utilizing its inherent reverse self-locking characteristic, when the motor stops working, the load applied to the inner column and the working platform cannot drive the worm gear in the reverse direction, thereby cutting off the path of reverse power transmission. This effectively prevents the column from accidentally retracting or the platform from falling under load, and reliably locks the column at the required height, greatly improving the safety of the equipment.

[0015] 2. This application sets the cross-sections of the inner and outer columns to rectangular shapes, and uses a threaded rod connected to the bottom of the inner column via a threaded connection. This allows the inner column, constrained by the outer column and unable to rotate, to only perform linear lifting and lowering movements when the motor drives the threaded rod to rotate. This structure avoids swaying and deflection during lifting and lowering, ensuring smooth operation. Simultaneously, by rationally setting a Z-shaped support with a connecting plate at the bottom of the outer column, which, together with the mounting shell, forms a stable support surface, the overall stability of the column under load and in operation is guaranteed, enhancing the mobility and on-site deployment flexibility of the equipment. Furthermore, the availability of locking casters at the bottom of the support allows individual columns to be easily moved within the maintenance workshop. Maintenance personnel can quickly and flexibly adjust the layout of multiple columns according to the specific model of the aircraft to be maintained and the specific needs of the maintenance parts, thereby optimizing the efficiency of the work platform setup and adapting to diverse maintenance scenarios.

[0016] 4. By using the limiting post of the support part and the limiting groove on the card plate, the support part is initially positioned on the outer column, which makes it convenient for the bolts to pass through the holes of the connecting plate and the outer column to fix the support part on the outer column and stably support the outer column on the ground. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall design of this utility model;

[0018] Figure 2 This is a cross-sectional view of the present invention;

[0019] Figure 3 This is a cross-sectional view of the support part of this utility model;

[0020] Figure 4 This is a partially enlarged schematic diagram of the present invention.

[0021] Figure label:

[0022] 1. Mounting shell; 2. Outer column; 21. Retaining ring; 22. Receiving groove; 23. Clamping plate; 3. Inner column; 31. Protruding ring; 4. Support plate; 5. Mounting hole; 6. Support part; 61. Support plate; 62. Clamping block; 63. Limiting column; 64. Ball bearing; 65. Tie rod; 66. Spring; 7. Connecting plate; 71. Limiting groove; 8. Threaded rod; 9. Turbine; 10. Worm gear; 11. Motor. Detailed Implementation

[0023] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0024] This embodiment provides a maintenance dock support column for aircraft maintenance, such as... Figure 1 As shown, it mainly includes a fixed component, a sliding component, and a power component that drives the sliding component to rise and fall.

[0025] The fixing assembly forms the supporting foundation of the entire column. The fixing assembly includes a hollow outer column 2 and a mounting shell 1 fixedly installed at the bottom end of the outer column 2. The cross-section of the outer column 2 is preferably rectangular. Several support portions 6 are provided on the outer side of the bottom end of the outer column 2 to enhance the stability of the column when standing. In a preferred embodiment, there are three support portions 6, respectively installed on three sides of the rectangular outer column 2, while the fourth side is supported by the protruding mounting shell 1 itself. The bottom surface of the mounting shell 1 and the bottom surfaces of all the support portions 6 are on the same horizontal plane, thus forming a stable supporting plane.

[0026] To ensure secure installation of the support unit 6, each support unit 6 includes a Z-shaped support plate 61. A locking block 62 is fixed to one end of the support plate 61, and a connecting plate 7 is fixed at the connection between the support plate 61 and the locking block 62. The connecting plate 7 has several horizontal channels and several vertical limiting grooves 71. Similarly, a set of through holes matching the horizontal channels on the connecting plate 7 are provided at the corresponding positions on the side wall of the outer column 2. During installation, bolts are passed sequentially through the channels on the connecting plate 7 and the through holes on the outer column 2, and then tightened with nuts to securely fix the support unit 6 to the outer column 2. To further improve the ease of column movement, casters with locking functions (not shown in the figure) can be installed at the bottom of each support unit 6. This allows the casters to be unlocked for pushing when the column position needs adjustment; after positioning, locking the casters will fix the position.

[0027] To initially position the support 6 and the outer column 2 during installation, a limiting post 63 is slidably provided within the limiting groove 71, such as... Figure 3 and Figure 4 As shown. To facilitate the movement of the limiting post 63 on the clamping plate 23, a ball bearing 64 is rotatably provided at the bottom end of the limiting post 63. A pull rod 65 and a spring 66 are fixedly provided at the top end of the limiting post 63. The spring 66 is sleeved on the outer ring of the pull rod 65, and the top end of the spring 66 is fixedly connected to the connecting plate 7. When the spring 66 naturally extends, it pushes the limiting post 63 to move downward and extend into the limiting hole of the clamping plate 23, thus initially fixing the support part 6 to the outer post 2. When the clamping block 62 is inserted into the corresponding receiving groove 22, the limiting post 63 is directly opposite the limiting hole on the clamping plate 23.

[0028] When installing the support part 6, align the locking block 62 with the receiving groove 22, pull the pull rod 65 upward, the spring 66 retracts, pulling the limiting post 63 into the limiting groove 71, so that the ball 64 contacts the locking plate 23, pushing the locking block 62 into the receiving groove 22, and the ball 64 rolls on the locking plate 23. When the locking block 62 is fully inserted into the receiving groove 22, the limiting post 63 is aligned with the limiting hole on the locking plate 23. Release the pull rod 65, the spring 66 rebounds, pushing the limiting post 63 into the limiting hole, completing the initial positioning of the support part 6.

[0029] An annular retaining ring 21 is fixedly installed on the inner ring of the top of the outer column 2. Three receiving grooves 22 are provided at the bottom to accommodate the support part 6. A retaining plate 23 is provided below the receiving grooves 22 and is fixedly connected to the outer column 2. A limiting hole for accommodating the limiting post 63 is provided above the retaining plate 23. The inner hole of the retaining ring 21 serves as a guide channel for the sliding assembly.

[0030] The sliding assembly is used to directly or indirectly support the work platform. The sliding assembly includes an inner column 3. The shape of the inner column 3 matches that of the outer column 2, preferably with a rectangular cross-section, allowing it to slide within the cavity of the outer column 2 without relative rotation. A protruding ring 31 is fixed at the top of the inner column 3. An internally threaded hole is formed at the bottom of the inner column 3.

[0031] During assembly, the inner post 3 is inserted downwards from the top of the outer post 2. The shaft of the inner post 3 passes through the inner hole of the retaining ring 21 and forms a sliding fit with the retaining ring 21. The outer diameter of the protruding ring 31 fixed to the top of the inner post 3 is larger than the inner diameter of the retaining ring 21. This design ensures that when the inner post 3 slides upwards, the protruding ring 31 is blocked by the retaining ring 21, thereby preventing the inner post 3 from completely dislodging from the outer post 2, and playing an important safety limiting role.

[0032] The power assembly provides the power to drive the sliding assembly to rise and fall, and has a crucial self-locking function. The power assembly is housed inside the mounting housing 1. Figure 2 As shown, the power assembly includes a vertically arranged threaded rod 8 and a drive unit that drives its rotation.

[0033] The drive unit specifically includes a meshing turbine 9 and a worm gear 10. The center hole of the turbine 9 is fixed to the lower end of the threaded rod 8 by a key or other means, allowing the turbine 9 to drive the threaded rod 8 to rotate together. One end of the worm gear 10 is rotatably connected to the side wall of the mounting housing 1 via a bearing, and the other end is fixedly connected to the output shaft of the motor 11, which is fixedly mounted on the mounting housing 1. When the motor 11 starts, it drives the worm gear 10 to rotate, thereby driving the meshing turbine 9 and the threaded rod 8 to rotate together.

[0034] The upper end of the threaded rod 8 protrudes from the top of the mounting housing 1 and forms a rotatable connection with the top cover of the mounting housing 1 through a bearing. The upper end of the protruding threaded rod 8 is screwed into the internal threaded hole at the bottom of the inner column 3 to form a threaded pair.

[0035] Its working principle is as follows: When the motor 11 rotates, it drives the threaded rod 8 to rotate through the transmission of the worm gear 10 and the turbine 9. Since the rectangular cross-section of the inner column 3 is constrained by the rectangular inner cavity of the outer column 2 and cannot rotate on its own, the rotating threaded rod 8 will push the inner column 3 to move upward or downward in a straight line under the action of the threaded pair, thus achieving lifting and lowering. Since the transmission pair of the turbine 9 and the worm gear 10 has a reverse self-locking characteristic, that is, the worm gear 10 can drive the turbine 9, but the turbine 9 cannot drive the worm gear 10 in the reverse direction, when the motor 11 stops working, the gravitational load applied to the inner column 3 cannot drive the threaded rod 8 and the turbine 9 to rotate in the reverse direction, thereby reliably locking the inner column 3 in the current position and effectively preventing accidental falling.

[0036] In practical use, multiple such maintenance dock columns are arranged around the aircraft in the area where work is required. The support frame of the work platform can be placed on the support plate 4 at the top of the inner column 3. The support plate 4 has mounting holes 5, which can be bolted through to fix the work platform to the support plate 4, thus building a stable maintenance work platform. By controlling the motor 11 of each column, the height and level of the work platform can be finely adjusted to meet the needs of different working conditions.

[0037] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A maintenance dock support column for aircraft maintenance, characterized in that, It includes a fixed component and a sliding component. The sliding component is located inside the top of the fixed component and can slide up and down along the fixed component. The bottom of the fixed component is provided with a power component that drives the sliding component to slide up and down. The power component has a self-locking function to maintain the sliding component at a fixed height. The bottom of the outer side of the fixed component is provided with several support parts (6). The support parts (6) are used to support the maintenance dock column on the ground.

2. The maintenance dock column for aircraft maintenance according to claim 1, characterized in that, The fixing component includes a hollow outer column (2) and a mounting shell (1) fixed at the bottom of the outer column (2). The mounting shell (1) is used to install the power component.

3. The maintenance dock column for aircraft maintenance according to claim 2, characterized in that, The outer column (2) has a retaining ring (21) fixedly installed on the inner ring of the top end, and a plurality of accommodating grooves (22) for accommodating the support part (6) at the bottom end. A card plate (23) is provided below the accommodating groove (22), and the card plate (23) is fixedly connected to the outer column (2).

4. The maintenance dock column for aircraft maintenance according to claim 3, characterized in that, The support part (6) includes a Z-shaped support plate (61), one end of which is fixedly provided with a locking block (62), and a connecting plate (7) is fixedly provided at the connection between the support plate (61) and the locking block (62). The connecting plate (7) is provided with several horizontal holes and several vertical limiting grooves (71).

5. The maintenance dock column for aircraft maintenance according to claim 4, characterized in that, A limiting post (63) is slidably provided in the limiting groove (71). A ball bearing (64) is rotatably provided at the bottom end of the limiting post (63), and a pull rod (65) and a spring (66) are fixedly provided at the top end. The spring (66) is sleeved on the outer ring of the pull rod (65).

6. The maintenance dock column for aircraft maintenance according to claim 1, characterized in that, The sliding component includes an inner column (3), with a protruding ring (31) fixed at the top and a threaded hole at the bottom.

7. The maintenance dock column for aircraft maintenance according to claim 1, characterized in that, The power assembly includes a threaded rod (8) and a drive unit, the drive unit being used to drive the threaded rod (8) to rotate.

8. The maintenance dock column for aircraft maintenance according to claim 7, characterized in that, The drive unit includes a turbine (9) and a worm (10) that mesh with each other. The center of the turbine (9) is fixedly connected to the threaded rod (8), and the end of the worm (10) is provided with a motor (11) that drives it to rotate.

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