Aircraft maintenance material transportation lifting device

Abstract

An aircraft maintenance material transportation lifting device comprises a fixing frame, a lifting frame, a driving mechanism for driving the lifting frame to ascend and descend on the fixing frame, and a locking mechanism for positioning the lifting frame at a certain height of the fixing frame. A rack is vertically arranged on the outer side face of the stand column on one side of the fixing frame. The lifting frame is provided with a vertical pipe corresponding to the fixing frame stand column, and a sliding groove is formed in the side face of the lifting frame vertical pipe. The driving mechanism comprises a fixed pulley block, a movable pulley block, a driving steel cable, a turning pulley and a hand-cranking speed reducer; and the turning pulley horizontally turns a driving steel cable vertically connected between the fixed pulley block and the movable pulley block and then is connected to a flywheel of the hand-cranking speed reducer. The locking mechanism comprises a locking seat, a locking frame, a locking torsional spring, a locking cable, a locking pulley block, a first unlocking bolt and a second unlocking bolt. According to the device, the lifting frame is controlled to ascend and descend through the hand-cranking speed reducer, and the maintenance material transportation efficiency is effectively improved; the locking mechanism has the function of locking at any time, and safety accidents caused by accidental descending of the lifting frame are avoided.

Description

Technical Field

[0001] This utility model relates to the field of aircraft ground maintenance technology, and in particular to an aircraft maintenance material transport lifting device. Background Technology

[0002] When manufacturing or maintaining aircraft in an aircraft maintenance facility, a large number of ladders are used to construct a jet bridge-style work platform around the aircraft. For stability reasons, ladders are only provided at certain locations for personnel to access the aircraft or to move maintenance materials. Because aircraft are large, the jet bridge-style work platforms are correspondingly long, while the number of ladders is limited, and the distance from the ladders to certain maintenance points is also considerable. This makes moving maintenance materials cumbersome, especially heavy materials, requiring multiple people to work together, which is time-consuming, labor-intensive, and inefficient.

[0003] Therefore, the applicant needs to design a mobile lifting and transport device to transport heavy maintenance materials vertically to the maintenance work station in order to improve work efficiency. Utility Model Content

[0004] In view of the shortcomings of the prior art, this utility model provides an aircraft maintenance material transport lifting device to overcome the deficiencies in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An aircraft maintenance material transport lifting device includes a fixed frame, a lifting frame that slides vertically on the fixed frame, a drive mechanism for driving the lifting frame to move up and down on the fixed frame, and a locking mechanism for positioning the lifting frame at a certain height on the fixed frame.

[0007] The fixing frame is a frame structure, and a rack is vertically provided on the outer side of the column on one side of the fixing frame along the height direction of the fixing frame.

[0008] The lifting frame is a frame structure. The four corners of the lifting frame are provided with uprights corresponding to the fixed frame columns. The lifting frame uprights are sleeved on the fixed frame columns, and the sides of the lifting frame uprights and the racks on the fixed frame columns are provided with sliding grooves. The sliding grooves on the lifting frame uprights allow the racks on the fixed frame columns to be exposed.

[0009] Furthermore, the drive mechanism includes a fixed pulley block, a movable pulley block, a drive cable, a reversing pulley, and a hand-cranked reducer; the fixed pulley block is fixedly mounted on the top crossbeam of the fixed frame, the movable pulley block is fixedly mounted on the base plate of the lifting frame, the hand-cranked reducer is fixedly mounted on the base plate of the lifting frame, and the reversing pulley is mounted on the lifting frame. The reversing pulley horizontally changes the drive cable, which is vertically connected between the fixed pulley block and the movable pulley block, and then connects it to the flywheel of the hand-cranked reducer.

[0010] Furthermore, the locking mechanism includes a locking seat, a locking frame, a locking torsion spring, a locking cable, and a locking pulley assembly; the locking seat is fixedly installed on the lifting frame upright; the locking frame is hinged to the locking seat via a hinge shaft, and the crossbar of the locking frame engages with the rack on the fixed frame upright; the locking torsion spring is installed on the hinge shaft, with one end connected to the locking seat and the other end connected to the locking frame, and the locking torsion spring ensures that the crossbar of the locking frame always remains in contact with the rack on the fixed frame upright; one end of the locking cable is connected to the pull rod of the locking frame, and the other end extends to the side of the hand-cranked reducer via the locking pulley assembly.

[0011] Furthermore, the locking mechanism also includes a first unlocking pin and a second unlocking pin. The first unlocking pin is disposed on the locking seat; the second unlocking pin is disposed on the side plate of the hand-cranked reducer and connected to the other end of the locking cable.

[0012] Preferably, the base of the fixed frame is symmetrically provided with frame positioning components; the frame positioning components include a horizontally arranged base plate and a vertically arranged hand-tightening screw; the base plate is fixed on the base of the fixed frame, and the hand-tightening screw is screwed to the base plate through a screw sleeve.

[0013] Preferably, the lifting frame is divided into upper and lower layers by a partition, and the upper and lower layers are connected by a straight ladder.

[0014] Preferably, the hand-cranked reducer is further provided with a locking pin, which can prevent the crank handle of the hand-cranked reducer from reversing.

[0015] Preferably, the base of the fixing frame is provided with self-locking casters.

[0016] Preferably, the locking pulley assembly is fixed to the partition of the lifting frame.

[0017] Preferably, a total of four sets of the frame positioning components are provided.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] 1) The aircraft maintenance material transport lifting device of this case controls the lifting of the lifting frame by means of a hand-cranked reducer, a fixed pulley block and a movable pulley block, effectively transporting maintenance materials to the boardwalk-type work platform with high transport efficiency.

[0020] 2) The aircraft maintenance material transport lifting device in this case is equipped with a locking mechanism. The locking mechanism has the function of locking at any time to prevent the lifting frame from falling unexpectedly and causing safety accidents. At the same time, the locking mechanism has two unlocking methods for operators to choose from, which is more in line with the needs of actual working conditions. The unlocking process can be operated by one person or multiple people, with high safety and high efficiency.

[0021] 3) The aircraft maintenance material transport lifting device in this case is equipped with self-locking casters and has good mobility.

[0022] To provide a clearer understanding of this invention, the preferred embodiments of this invention will be described below in conjunction with the accompanying drawings. Attached Figure Description

[0023] Figure 1 This is a three-dimensional rendering of the present invention;

[0024] Figure 2 This is a front view structural diagram of the present invention;

[0025] Figure 3 This is a side view of the structure of this utility model;

[0026] Figure 4 This is a schematic diagram of the structure of the fixing frame of this utility model;

[0027] Figure 5 This is a schematic diagram of the lifting frame of this utility model;

[0028] Figure 6 This is a schematic diagram of the drive mechanism of this utility model;

[0029] Figure 7 This is a schematic diagram of the locking mechanism of this utility model;

[0030] Figure 8 This is an assembly diagram of the locking frame of this utility model.

[0031] Attached image labels:

[0032] 1-Fixed frame, 2-Lifting frame; 11-Rack, 12-Crossbeam, 14-Seat plate, 15-Hand-tightening screw; 21-Slide groove; 31-Fixed pulley block, 32-Moving pulley block, 33-Drive steel cable, 34-Directional pulley, 35-Hand-cranked reducer, 351-Locking pin; 41-Locking seat, 42-Locking frame, 43-Locking torsion spring, 44-Locking cable, 45-Locking pulley block, 46-First unlocking pin, 47-Second unlocking pin; 421-Crossbar, 422-Pull rod. Detailed Implementation

[0033] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," 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 do not indicate or imply that the device or element 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. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0034] Furthermore, if terms such as "first" or "second" are used for descriptive purposes only, they are mainly used to distinguish different devices, components or parts (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance or quantity of the indicated devices, components or parts, and should not be construed as indicating or implying relative importance.

[0035] Furthermore, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0036] Please see Figure 1-8 This utility model provides an aircraft maintenance material transport lifting device, including a fixed frame 1, a lifting frame 2 that is slidably mounted on the fixed frame 1, a drive mechanism for driving the lifting frame 2 to move up and down on the fixed frame 1, and a locking mechanism for positioning the lifting frame 2 at a certain height on the fixed frame 1.

[0037] The fixing frame 1 is a square frame structure. A rack 11 is vertically arranged on the outer side of the column on one side of the fixing frame 1 along the height direction of the fixing frame 1. The width of the rack 11 is smaller than the width of the column of the fixing frame 1. A crossbeam 12 is connected to the top of the fixing frame 1. A self-locking universal wheel is provided under the base of the fixing frame 1, and frame positioning components are symmetrically arranged around the base of the fixing frame 1.

[0038] The frame positioning assembly includes a horizontally arranged base plate 14 and a vertically arranged hand-tightening screw 15; the base plate 14 is fixed on the base of the fixed frame 1, and the hand-tightening screw 15 is screwed onto the base plate 14 through a screw sleeve.

[0039] Preferably, in this embodiment, a total of 4 sets of the frame positioning components are provided; by adjusting the hand screws 15 on the frame positioning components, the hand screws 15 can be raised and lowered vertically and contact the support plane, thereby ensuring the stability of the fixed frame 1 on the support plane and ensuring work safety; if it is necessary to move and transfer the fixed frame 1, simply loosen the hand screws 15, and by manually pushing and pulling, the self-locking casters will transfer the fixed frame 1 to the required work position.

[0040] The lifting frame 2 is a square frame structure. The four corners of the lifting frame 2 are provided with uprights corresponding to the columns of the fixed frame 1. The uprights of the lifting frame 2 are sleeved on the columns of the fixed frame 1, and the sides of the uprights of the lifting frame 2 corresponding to the racks 11 on the columns of the fixed frame 1 are provided with sliding grooves 21. The sliding grooves 21 on the uprights of the lifting frame 2 allow the racks 11 on the columns of the fixed frame 1 to be exposed, so that the lifting frame 2 can slide up and down on the fixed frame 1.

[0041] Furthermore, the elevator 2 is divided into upper and lower layers by a partition, and the two layers are connected by a straight ladder; the upper and lower layers of the elevator 2 can meet the needs of operation at different heights and can correspond to the existing two-layer operation platform of the aircraft maintenance plant.

[0042] As a preferred embodiment, a nylon retaining ring (not shown) is provided in the sleeve gap between the lifting frame 2 upright and the fixed frame 1 column. The nylon retaining ring has a lubricating effect, ensuring that the lifting frame 2 upright can slide smoothly on the fixed frame 1 column, thereby ensuring that the lifting frame 2 can smoothly rise and fall on the fixed frame 1.

[0043] The drive mechanism includes a fixed pulley block 31, a movable pulley block 32, a drive cable 33, a reversing pulley 34, and a hand-cranked reducer 35. The fixed pulley block 31 is fixedly mounted on the top crossbeam 12 of the fixed frame 1, the movable pulley block 32 is fixedly mounted on the base plate of the lifting frame 2, the hand-cranked reducer 35 is fixedly mounted on the base plate of the lifting frame 2, and the reversing pulley 34 is mounted on the lifting frame 2. The reversing pulley 34 horizontally reverses the drive cable 33, which is vertically connected between the fixed pulley block 31 and the movable pulley block 32, and connects it to the flywheel of the hand-cranked reducer 35. When the crank of the hand-cranked reducer 35 is turned, the flywheel of the hand-cranked reducer 35 drives the drive cable 33. The drive cable 33 cooperates with the fixed pulley block 31 and the movable pulley block 32 to drive the lifting frame 2 to rise and fall on the fixed frame 1.

[0044] Furthermore, the hand-cranked reducer 35 is also equipped with a locking pin 351, which can prevent the crank handle of the hand-cranked reducer 35 from reversing, thereby ensuring that the raised lifting frame 2 will not accidentally slide down and cause a safety accident.

[0045] The locking mechanism includes a locking seat 41, a locking frame 42, a locking torsion spring 43, a locking cable 44, a locking pulley block 45, a first unlocking pin 46, and a second unlocking pin 47. The locking seat 41 is fixedly installed on the vertical tube of the lifting frame 2. The locking frame 42 is hinged to the locking seat 41 via a hinge shaft, and the crossbar 421 of the locking frame 42 engages with the rack 11 on the column of the fixed frame 1. The locking torsion spring 43 is installed on the hinge shaft, and one end of the locking torsion spring 43 is connected to the locking seat 41, and the other end is connected to the locking frame 42. The locking torsion spring 43 ensures that the crossbar 421 of the locking frame 42 always remains in contact with the rack 11 on the column of the fixed frame 1. Under the action of the locking torsion spring 43, the lifting frame 2 can rise freely. When the lifting frame 2 descends, the crossbar 421 of the locking frame 42 locks the rack 11 on the column of the fixed frame 1, achieving a self-locking effect during descent and further ensuring operational safety. One end of the locking cable 44 is connected to the pull rod 422 of the locking frame 42, and the other end extends through the locking pulley group 45 to one side of the hand-cranked reducer 35 and is connected to the second unlocking pin 47. The locking pulley group 45 is fixed on the partition of the lifting frame 2. The first unlocking pin 46 is set on the locking seat 41. The second unlocking pin 47 is set on the side plate of the hand-cranked reducer 35 and is connected to the other end of the locking cable 44.

[0046] Working principle of the locking mechanism:

[0047] During the rising phase of the lifting frame 2, under the action of the locking torsion spring 43, the crossbar 421 of the locking frame 42 always remains in contact with the rack 11 on the column of the fixed frame 1. Since the rack 11 is set with helical teeth, the lifting frame 2 is not obstructed when it rises.

[0048] When the lifting frame 2 is self-locking, under the action of the locking torsion spring 43, the crossbar 421 of the locking frame 42 is locked in the rack 11, and the lifting frame 2 can be self-locked at a certain height.

[0049] During the descent preparation phase of the lifting frame 2, the first unlocking method is as follows: manually pull the lever 422 of the locking frame 42 to disengage the crossbar 421 of the locking frame 42 from the rack 11, and prevent the locking frame 42 from resetting through the first unlocking pin 46, so that the crossbar 421 of the locking frame 42 is always disengaged from the rack 11. The descent of the lifting frame 2 can be controlled by controlling the hand-cranked reducer 35.

[0050] During the descent preparation phase of the lifting frame 2, the second unlocking method is as follows: the operator next to the hand-cranked reducer 35 pulls the locking cable 44 and connects the locking cable 44 to the second unlocking pin 47, causing the crossbar 421 of the locking frame 42 to disengage from the rack 11. The second unlocking pin 47 prevents the locking frame 42 from resetting, ensuring that the crossbar 421 of the locking frame 42 is always disengaged from the rack 11. The descent of the lifting frame 2 can be controlled by controlling the hand-cranked reducer 35.

[0051] In actual working conditions, operators can choose either the first or the second unlocking method to unlock the locking mechanism, or they can use both methods simultaneously. In practice, when there are insufficient personnel, the second unlocking method should be prioritized. This is because, with the second unlocking pin 47 located on the side plate of the hand-cranked reducer 35, operators can easily unlock the locking mechanism from near the reducer 35, allowing for single-person operation and high efficiency.

[0052] Working Principle: When operating within an aircraft maintenance facility, to transport maintenance materials to the existing two-story jet bridge-style work platform, this device is first moved to the appropriate location. Then, the maintenance materials are placed on the lifting frame 2, and the lifting frame 2 is raised and lowered using a hand-cranked reducer 35, thus completing the transport of maintenance materials. During the raising and lowering process, the locking mechanism has a locking function that can be used at any time to prevent accidents caused by accidental descent of the lifting frame. The normal descent of the lifting frame 2 requires unlocking the locking mechanism first. Two unlocking methods are available for operators to choose from, better meeting the needs of actual working conditions.

[0053] Compared to existing technologies, the aircraft maintenance material transport lifting device in this case uses a hand-cranked reducer, fixed pulley block and movable pulley block to control the lifting frame, effectively transporting maintenance materials to the boardwalk-type work platform, with high transportation efficiency.

[0054] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. An aircraft maintenance material transport lifting device, comprising a fixed frame (1), a lifting frame (2) slidably mounted on the fixed frame (1), a drive mechanism for driving the lifting frame (2) to move up and down on the fixed frame (1), and a locking mechanism for positioning the lifting frame (2) at a certain height on the fixed frame (1), characterized in that: The fixing frame (1) is a frame structure, and a rack (11) is vertically arranged on the outer side of the column on one side of the fixing frame (1) along the height direction of the fixing frame (1); The lifting frame (2) is a frame structure. The four corners of the lifting frame (2) are provided with uprights corresponding to the columns of the fixed frame (1). The uprights of the lifting frame (2) are sleeved on the columns of the fixed frame (1), and the sides of the uprights of the lifting frame (2) corresponding to the racks (11) on the columns of the fixed frame (1) are provided with grooves (21). The grooves (21) on the uprights of the lifting frame (2) allow the racks (11) on the columns of the fixed frame (1) to be exposed.

2. The aircraft maintenance material transport lifting device according to claim 1, characterized in that: The drive mechanism includes a fixed pulley block (31), a movable pulley block (32), a drive cable (33), a reversing pulley (34), and a hand-cranked reducer (35). The fixed pulley block (31) is fixedly mounted on the top crossbeam (12) of the fixed frame (1), the movable pulley block (32) is fixedly mounted on the bottom plate of the lifting frame (2), the hand-cranked reducer (35) is fixedly mounted on the bottom plate of the lifting frame (2), and the reversing pulley (34) is mounted on the lifting frame (2). The reversing pulley (34) horizontally changes the drive cable (33) that is vertically connected between the fixed pulley block (31) and the movable pulley block (32) and connects it to the flywheel of the hand-cranked reducer (35).

3. The aircraft maintenance material transport lifting device according to claim 2, characterized in that: The locking mechanism includes a locking seat (41), a locking frame (42), a locking torsion spring (43), a locking cable (44), and a locking pulley block (45); the locking seat (41) is fixedly installed on the vertical tube of the lifting frame (2); the locking frame (42) is hinged to the locking seat (41) via a hinge shaft, and the crossbar (421) of the locking frame (42) engages with the rack (11) on the column of the fixed frame (1); the locking torsion spring (43) is installed on... On the hinge shaft, one end of the locking torsion spring (43) is connected to the locking seat (41), and the other end is connected to the locking frame (42). The locking torsion spring (43) ensures that the crossbar (421) of the locking frame (42) is always in contact with the rack (11) on the column of the fixed frame (1). One end of the locking cable (44) is connected to the pull rod (422) of the locking frame (42), and the other end extends to the side of the hand-cranked reducer (35) through the locking pulley block (45).

4. The aircraft maintenance material transport lifting device according to claim 3, characterized in that: The locking mechanism further includes a first unlocking pin (46) and a second unlocking pin (47). The first unlocking pin (46) is disposed on the locking seat (41); the second unlocking pin (47) is disposed on the side plate of the hand-cranked reducer (35) and connected to the other end of the locking cable (44).

5. The aircraft maintenance material transport lifting device according to claim 4, characterized in that: The base of the fixed frame (1) is symmetrically provided with frame positioning components around its perimeter; the frame positioning components include a horizontally arranged seat plate (14) and a vertically arranged hand-tightening screw (15); the seat plate (14) is fixed on the base of the fixed frame (1), and the hand-tightening screw (15) is screwed onto the seat plate (14) by a screw sleeve.

6. The aircraft maintenance material transport lifting device according to claim 4, characterized in that: The lifting frame (2) is divided into upper and lower layers by a partition, and the upper and lower layers are connected by a straight ladder.

7. The aircraft maintenance material transport lifting device according to claim 4, characterized in that: The hand-cranked reducer (35) is also provided with a locking pin (351), which can prevent the crank handle of the hand-cranked reducer (35) from reversing.

8. The aircraft maintenance material transport lifting device according to claim 4, characterized in that: The base of the fixed frame (1) is equipped with self-locking casters.

9. The aircraft maintenance material transport lifting device according to claim 4, characterized in that: The locking pulley assembly (45) is fixed to the partition of the lifting frame (2).

10. The aircraft maintenance material transport lifting device according to claim 5, characterized in that: A total of four sets of the frame positioning components are provided.

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