阅读说明：本技术 一种用于320飞机维修用的升降装置 (Lifting device for 320 aircraft maintenance ) 是由 陈进京 邓雷 于 2021-07-01 设计创作，主要内容包括：本发明公开了一种用于320飞机维修用的升降装置,包括支撑底座、电池、控制盒、控制手柄、侧边支撑机构、一级升降驱动机构、二级升降驱动机构以及工作平台。该用于320飞机维修用的升降装置利用侧边支撑机构对支撑底座的边缘进行定位支撑,保证维修时支撑底座的稳定性；利用一级升降驱动机构实现了工作平台高度位置的一级调整；利用二级升降驱动机构对工作平台的高度位置进行二级调整,保证工作平台能到达飞机维修位置的高度；利用控制手柄便于维修人员控制该升降装置；利用前进按键、后退按键、左转按键以及右转按键,控制器通过滚轮驱动电路控制电动滚轮,便于维修人员在工作平台上移动该升降装置。(The invention discloses a lifting device for 320 airplane maintenance, which comprises a supporting base, a battery, a control box, a control handle, a side supporting mechanism, a primary lifting driving mechanism, a secondary lifting driving mechanism and a working platform. The lifting device for 320 aircraft maintenance uses the side supporting mechanism to position and support the edge of the supporting base, so as to ensure the stability of the supporting base during maintenance; the primary lifting driving mechanism is utilized to realize primary adjustment of the height position of the working platform; the height position of the working platform is adjusted in a second-stage manner by using a second-stage lifting driving mechanism, so that the working platform can reach the height of the airplane maintenance position; the control handle is used for facilitating the control of the lifting device by maintenance personnel; by utilizing the forward key, the backward key, the left-turn key and the right-turn key, the controller controls the electric roller through the roller driving circuit, so that maintenance personnel can move the lifting device on the working platform conveniently.)

1. A lift assembly for use in 320 aircraft maintenance, comprising: the device comprises a supporting base (1), a battery (2), a control box (5), a control handle (6), a side supporting mechanism, a primary lifting driving mechanism, a secondary lifting driving mechanism and a working platform (3);

the side supporting mechanism consists of a supporting driving mechanism and four supporting branches, the supporting driving mechanism is installed in the supporting base (1), the four supporting branches are respectively installed on four vertical side surfaces of the supporting base (1), and the supporting driving mechanism synchronously drives the four supporting branches to position and support the edge of the supporting base (1); universal wheels (18) are respectively arranged at two top corners on the same side edge of the lower side surface of the supporting base (1), and electric rollers (17) are respectively arranged at the other two top corners; the primary lifting driving mechanism is arranged on the supporting base (1), the secondary lifting driving mechanism is arranged on the primary lifting driving mechanism, the working platform (3) is fixed on the secondary lifting driving mechanism, and the primary lifting driving mechanism and the secondary lifting driving mechanism jointly drive the working platform (3) to lift; the surrounding edges of the working platform (3) are provided with fences (37); the control box (5) is arranged on the fence (37); the battery (2) is arranged on the lower side surface of the supporting base (1);

a controller, a roller driving circuit and a power supply module are arranged in the control box (5); the control handle (6) is electrically connected to the controller through a cable; the supporting driving mechanism, the primary lifting driving mechanism and the secondary lifting driving mechanism are all driven by a controller; the roller driving circuit is electrically connected with the controller and the two electric rollers (17); the battery (2) supplies power to the controller, the side supporting mechanism, the primary lifting driving mechanism, the secondary lifting driving mechanism and the roller driving circuit through the power supply module; the control handle (6) is provided with a forward key, a backward key, a left-turn key and a right-turn key which are electrically connected with the controller.

2. An elevator arrangement for 320 aircraft servicing according to claim 1, wherein: a ladder stand (4) for climbing is arranged on the fence (37) on one side; an inclined stay bar is supported between the ladder stand (4) and the lower side surface of the working platform (3).

3. An elevator arrangement for 320 aircraft servicing according to claim 1, wherein: a tool box (7) is arranged on the working platform (3); the tool box (7) is covered with a cover plate (8), and the cover plate (8) is provided with a handle (9).

4. An elevator arrangement for 320 aircraft servicing according to claim 1, wherein: the support branch comprises a support sleeve (19), a protection sleeve (20), a secondary driving bevel gear (25), a transmission rod (26), a support screw rod (21) and a support plate (22);

one ends of the four supporting sleeves (19) are respectively fixed on four vertical side surfaces of the supporting base (1), and the four supporting sleeves (19) are distributed in a cross shape; the protective sleeve (20) is a cylindrical tube with two closed ends; a sleeve through hole (38) is arranged on each of the two closed ends of the protective sleeve (20); the protective sleeve (20) is vertically fixed on the other end of the support sleeve (19); a base cavity (41) is arranged in the supporting base (1); one end of the transmission rod (26) extends into the protective sleeve (20), and a secondary driving bevel gear (25) is arranged on the end part; the other end of the transmission rod (26) penetrates through the support sleeve (19) and then extends into the base cavity (41); the supporting driving mechanism is arranged in the base cavity (41) and synchronously drives the four transmission rods (26) to rotate; the support screw (21) penetrates through the two sleeve through holes (38); a transmission internal thread sleeve (27) is rotatably arranged in the protective sleeve (20) through a bearing (32), and a support screw rod (21) is screwed on the transmission internal thread sleeve (27); a secondary driven bevel gear (24) is coaxially arranged on the outer pipe wall of the transmission internal thread sleeve (27), and the secondary driven bevel gear (24) is meshed with a secondary driving bevel gear (25); the support plate (22) is fixed on the lower end of the support screw (21).

5. An elevator arrangement for 320 aircraft servicing according to claim 4, wherein: the supporting driving mechanism comprises a supporting driving motor (34), a primary driving bevel gear (35) and four primary driven bevel gears (33);

four first-stage driven bevel gears (33) are respectively arranged on the end parts of the four transmission rods (26) extending into the cavity (41) of the base; the supporting driving motor (34) is arranged in the base cavity (41); the primary driving bevel gear (35) is arranged on an output shaft of the supporting driving motor (34), and the primary driving bevel gear (35) is meshed with the four primary driven bevel gears (33) simultaneously;

a supporting driving circuit electrically connected with the controller is arranged in the control box (5); the supporting driving circuit is electrically connected with the supporting driving motor (34), and the controller drives the supporting driving motor (34) to rotate through the supporting driving circuit; a supporting and lifting key and a supporting and releasing key which are electrically connected with the controller are arranged on the control handle (6).

6. An elevator arrangement for 320 aircraft servicing according to claim 4, wherein: a sliding groove (23) is arranged on the supporting screw rod (21) along the length direction; the hole walls of the two sleeve through holes (38) are provided with sliding blocks which are in sliding fit with the sliding grooves (23).

7. An elevator arrangement for 320 aircraft servicing according to claim 4, wherein: a non-slip mat (39) is provided on the lower side surface of the support plate (22).

8. An elevator arrangement for 320 aircraft servicing according to claim 1, wherein: the primary lifting driving mechanism comprises a lifting platform (31), a U-shaped plate (11), a primary lifting driving motor (10) and a primary transmission screw (30);

two rectangular holes are arranged in the middle of the lifting platform (31); a primary internal thread sleeve (29) is vertically fixed between the two rectangular holes in the middle of the lifting platform (31) in a penetrating manner; two vertical side plates of the U-shaped plate (11) penetrate through the two rectangular holes and are fixed on the upper side surface of the supporting base (1);

the primary lifting driving motor (10) is arranged on the upper side surface of the U-shaped plate (11), and an output shaft of the primary lifting driving motor (10) downwards penetrates through the upper side plate of the U-shaped plate (11); the upper end of the primary transmission screw (30) is butted on the output shaft penetrating end of the primary lifting drive motor (10), the lower end of the primary transmission screw (30) is rotatably supported on the upper side surface of the support base (1), and the middle part of the primary transmission screw (30) is screwed on the primary internal thread sleeve (29); the secondary lifting driving mechanism is arranged on the lifting platform (31);

a first-stage lifting drive circuit electrically connected with the controller is arranged in the control box (5); the first-stage lifting driving circuit is electrically connected with the lifting driving motor (10), and the controller drives the first-stage lifting driving motor (10) to rotate through the first-stage lifting driving circuit; a first-level ascending key and a first-level descending key which are electrically connected with the controller are arranged on the control handle (6).

9. An elevator arrangement for 320 aircraft servicing according to claim 8, wherein: the secondary lifting driving mechanism comprises a secondary lifting driving motor (12), four secondary internal threaded pipes (13) and four secondary transmission screw rods (16);

an installation cavity (40) is arranged in the lifting platform (31); the four secondary internal threaded pipes (13) are vertically arranged on the upper side surface of the lifting platform (31) in a rotating mode, and the lower ends of the four secondary internal threaded pipes (13) extend into the mounting cavity (40); the four secondary internal thread pipes (13) are distributed on four equal division points of the same circumference, and the primary transmission screw (30) is positioned at the circle center; the extending ends of the four secondary internal thread pipes (13) are respectively provided with a driven chain wheel (28); the secondary lifting driving motor (12) is arranged on the upper side surface of the lifting platform (31), and an output shaft of the secondary lifting driving motor (12) extends into the mounting cavity (40); a driving chain wheel (30) is arranged at the extending end of the output shaft of the secondary lifting driving motor (12); the driving chain wheel (30) is simultaneously matched with the four driven chain wheels (28) for transmission through a chain; the upper ends of the four secondary transmission screw rods (16) are all fixed on the bottom surface of the working platform (3), and the lower ends of the four secondary transmission screw rods (16) are screwed on the upper ends of the four secondary internal threaded pipes (13) respectively;

a secondary lifting drive circuit electrically connected with the controller is arranged in the control box (5); the secondary lifting driving circuit is electrically connected with the secondary lifting driving motor (12), and the controller drives the secondary lifting driving motor (12) to rotate through the secondary lifting driving circuit; a secondary ascending key and a secondary descending key which are electrically connected with the controller are arranged on the control handle (6).

10. An elevator arrangement for 320 aircraft servicing according to claim 8, wherein: two guide holes are arranged on the lifting platform (31); two guide rods (14) are fixed on the upper side surface of the supporting base (1), and the upper ends of the two guide rods (14) respectively penetrate through the two guide holes.

Technical Field

The invention relates to a lifting device, in particular to a lifting device for 320 aircraft maintenance.

Background

At present, most of the existing aircraft maintenance platforms adopt a fixed maintenance support, then the local part of the aircraft is detected on the maintenance support manually, and the position is relatively fixed in one-time detection. Because the area of aircraft wing is great, and the model is different, this kind of fixed mode efficiency of overhauing the support is lower, is difficult to satisfy current maintenance needs.

Disclosure of Invention

The purpose of the invention is as follows: a lifting device for 320 aircraft maintenance is provided, which can move and lift according to the position needing to be detected on the aircraft wing.

The technical scheme is as follows: the invention relates to a lifting device for 320 airplane maintenance, which comprises a supporting base, a battery, a control box, a control handle, a side supporting mechanism, a primary lifting driving mechanism, a secondary lifting driving mechanism and a working platform, wherein the battery is arranged on the supporting base;

the side supporting mechanism consists of a supporting driving mechanism and four supporting branches, the supporting driving mechanism is arranged in the supporting base, the four supporting branches are respectively arranged on four vertical side surfaces of the supporting base, and the supporting driving mechanism synchronously drives the four supporting branches to position and support the edge of the supporting base; universal wheels are arranged at two top corners on the same side edge of the lower side surface of the supporting base, and electric idler wheels are arranged at the other two top corners; the first-stage lifting driving mechanism is arranged on the supporting base, the second-stage lifting driving mechanism is arranged on the first-stage lifting driving mechanism, the working platform is fixed on the second-stage lifting driving mechanism, and the first-stage lifting driving mechanism and the second-stage lifting driving mechanism jointly drive the working platform to lift; fences are arranged on the edges of the periphery of the working platform; the control box is arranged on the fence; the battery is arranged on the lower side surface of the supporting base;

a controller, a roller driving circuit and a power supply module are arranged in the control box; the control handle is electrically connected to the controller through a cable; the supporting driving mechanism, the primary lifting driving mechanism and the secondary lifting driving mechanism are all driven by a controller; the roller driving circuit is electrically connected with the controller and the two electric rollers; the battery supplies power to the controller, the side supporting mechanism, the primary lifting driving mechanism, the secondary lifting driving mechanism and the roller driving circuit through the power supply module; the control handle is provided with a forward key, a backward key, a left-turn key and a right-turn key which are electrically connected with the controller.

Furthermore, a ladder stand for climbing is arranged on the fence on one side of the fence; an inclined stay bar is supported between the ladder stand and the lower side surface of the working platform.

Further, a tool box is arranged on the working platform; the tool box is covered with a cover plate, and a handle is arranged on the cover plate.

Furthermore, the supporting branch comprises a supporting sleeve, a protective sleeve, a secondary driving bevel gear, a transmission rod, a supporting screw rod and a supporting plate;

one end of each of the four support sleeves is fixed on each of the four vertical side surfaces of the support base, and the four support sleeves are distributed in a cross shape; the protective sleeve is a cylindrical pipe with two closed ends; a sleeve through hole is formed in each of the two closed ends of the protective sleeve; the protective sleeve is vertically fixed on the other end of the support sleeve; a base cavity is arranged in the supporting base; one end of the transmission rod extends into the protective sleeve, and the secondary driving bevel gear is arranged on the end part; the other end of the transmission rod penetrates through the support sleeve and then extends into the cavity of the base; the supporting driving mechanism is arranged in the cavity of the base and synchronously drives the four transmission rods to rotate; the supporting screw rod penetrates through the two sleeve through holes; a transmission internal thread sleeve is rotatably arranged in the protective sleeve through a bearing, and the supporting screw is screwed on the transmission internal thread sleeve; a secondary driven bevel gear is coaxially arranged on the outer pipe wall of the transmission internal thread sleeve, and the secondary driven bevel gear is meshed with the secondary driving bevel gear; the supporting plate is fixed on the lower end of the supporting screw rod.

Furthermore, the supporting driving mechanism comprises a supporting driving motor, a primary driving bevel gear and four primary driven bevel gears;

the four first-stage driven bevel gears are respectively arranged on the end parts of the four transmission rods extending into the cavity of the base; the supporting driving motor is arranged in the cavity of the base; the primary driving bevel gear is arranged on an output shaft of the supporting driving motor and is meshed with the four primary driven bevel gears simultaneously;

a support driving circuit electrically connected with the controller is arranged in the control box; the supporting driving circuit is electrically connected with the supporting driving motor, and the controller drives the supporting driving motor to rotate through the supporting driving circuit; the control handle is provided with a supporting lifting key and a supporting releasing key which are electrically connected with the controller.

Furthermore, a sliding groove is arranged on the supporting screw rod along the length direction; and sliding blocks in sliding fit with the sliding grooves are arranged on the hole walls of the two sleeve through holes.

Furthermore, a non-slip mat is arranged on the lower side surface of the supporting plate.

Further, the primary lifting driving mechanism comprises a lifting platform, a U-shaped plate, a primary lifting driving motor and a primary transmission screw rod;

two rectangular holes are formed in the middle of the lifting platform; a primary internal thread sleeve is vertically fixed between the two rectangular holes in the middle of the lifting platform in a penetrating manner; two vertical side plates of the U-shaped plate penetrate through the two rectangular holes and are fixed on the upper side surface of the supporting base;

the primary lifting driving motor is arranged on the upper side surface of the U-shaped plate, and an output shaft of the primary lifting driving motor downwards penetrates through the upper side plate of the U-shaped plate; the upper end of the primary transmission screw is butted with the output shaft penetrating end of the primary lifting drive motor, the lower end of the primary transmission screw is rotatably supported on the upper side surface of the support base, and the middle part of the primary transmission screw is screwed on the primary internal thread sleeve; the secondary lifting driving mechanism is arranged on the lifting platform;

a first-level lifting drive circuit electrically connected with the controller is arranged in the control box; the first-stage lifting driving circuit is electrically connected with the lifting driving motor, and the controller drives the first-stage lifting driving motor to rotate through the first-stage lifting driving circuit; the control handle is provided with a first-stage ascending key and a first-stage descending key which are electrically connected with the controller.

Further, the secondary lifting driving mechanism comprises a secondary lifting driving motor, four secondary internal thread pipes and four secondary transmission screw rods;

an installation cavity is arranged in the lifting platform; the four secondary internal threaded pipes are vertically arranged on the upper side surface of the lifting platform in a rotating mode, and the lower ends of the four secondary internal threaded pipes extend into the mounting cavity; the four secondary internal thread pipes are distributed on four equal division points of the same circumference, and the primary transmission screw is positioned at the circle center; the extending ends of the four secondary internal thread pipes are respectively provided with a driven chain wheel; the second-stage lifting driving motor is arranged on the upper side surface of the lifting platform, and an output shaft of the second-stage lifting driving motor extends into the mounting cavity; a driving chain wheel is arranged at the extending end of the output shaft of the secondary lifting driving motor; the driving chain wheel is simultaneously matched with the four driven chain wheels for transmission through a chain; the upper ends of the four secondary transmission screw rods are fixed on the bottom surface of the working platform, and the lower ends of the four secondary transmission screw rods are screwed on the upper ends of the four secondary internal threaded pipes respectively;

a secondary lifting drive circuit electrically connected with the controller is arranged in the control box; the second-stage lifting driving circuit is electrically connected with the second-stage lifting driving motor, and the controller drives the second-stage lifting driving motor to rotate through the second-stage lifting driving circuit; a second-stage ascending key and a second-stage descending key which are electrically connected with the controller are arranged on the control handle.

Furthermore, two guide holes are arranged on the lifting platform; two guide rods are fixed on the upper side surface of the supporting base, and the upper ends of the two guide rods respectively penetrate through the two guide holes.

Compared with the prior art, the invention has the beneficial effects that: the movement of the supporting base is realized by the matching of the two universal wheels and the two electric rollers; the edge of the supporting base is positioned and supported by the side supporting mechanism, so that the stability of the supporting base during maintenance is ensured; the primary lifting driving mechanism is utilized to realize primary adjustment of the height position of the working platform; the height position of the working platform is adjusted in a second-stage manner by using a second-stage lifting driving mechanism, so that the working platform can reach the height of the airplane maintenance position; the fence is used for protecting the safety of maintenance personnel in the air; the control handle is used for facilitating the control of the lifting device by maintenance personnel; by utilizing the forward key, the backward key, the left-turn key and the right-turn key, the controller controls the electric roller through the roller driving circuit, so that maintenance personnel can move the lifting device on the working platform conveniently.

Drawings

FIG. 1 is a front view of the present invention;

FIG. 2 is a cross-sectional view of the primary lift drive mechanism of the present invention;

fig. 3 is a cross-sectional view of a protective sleeve of the present invention;

FIG. 4 is a cross-sectional view of the support base of the present invention;

fig. 5 is a schematic circuit structure of the present invention.

Detailed Description

The technical solution of the present invention is described in detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the embodiments.

Example 1:

as shown in fig. 1-5, the present invention discloses a lifting device for 320 aircraft maintenance, comprising: the device comprises a supporting base 1, a battery 2, a control box 5, a control handle 6, a side supporting mechanism, a primary lifting driving mechanism, a secondary lifting driving mechanism and a working platform 3;

the side supporting mechanism consists of a supporting driving mechanism and four supporting branches, the supporting driving mechanism is installed in the supporting base 1, the four supporting branches are respectively installed on four vertical side surfaces of the supporting base 1, and the supporting driving mechanism synchronously drives the four supporting branches to position and support the edge of the supporting base 1; universal wheels 18 are respectively arranged at two top corners on the same side edge of the lower side surface of the supporting base 1, and electric idler wheels 17 are respectively arranged at the other two top corners; the first-stage lifting driving mechanism is arranged on the supporting base 1, the second-stage lifting driving mechanism is arranged on the first-stage lifting driving mechanism, the working platform 3 is fixed on the second-stage lifting driving mechanism, and the first-stage lifting driving mechanism and the second-stage lifting driving mechanism jointly drive the working platform 3 to lift; the surrounding edges of the working platform 3 are all provided with a fence 37; the control box 5 is mounted on the rail 37; the battery 2 is mounted on the lower side of the support base 1;

a controller, a roller driving circuit and a power supply module are arranged in the control box 5; the control handle 6 is electrically connected to the controller through a cable; the supporting driving mechanism, the primary lifting driving mechanism and the secondary lifting driving mechanism are all driven by a controller; the roller driving circuit is electrically connected with the controller and the two electric rollers 17; the battery 2 supplies power to the controller, the side supporting mechanism, the primary lifting driving mechanism, the secondary lifting driving mechanism and the roller driving circuit through the power supply module; the control handle 6 is provided with a forward key, a backward key, a left turn key and a right turn key which are electrically connected with the controller.

The movement of the supporting base 1 is realized by the matching of the two universal wheels 18 and the two electric rollers 17; the four supporting branches are synchronously driven by the supporting driving mechanism to position and support the edge of the supporting base 1, so that the stability of the supporting base 1 during maintenance is ensured; the primary lifting driving mechanism is utilized to realize the primary adjustment of the height position of the working platform 3; the height position of the working platform 3 is adjusted in a second-stage manner by using a second-stage lifting driving mechanism, so that the working platform 3 can reach the height of the airplane maintenance position; the fence 37 is used for protecting the safety of maintenance personnel in the air; the control handle 6 is used for facilitating the control of the lifting device by maintenance personnel; by using the forward key, the backward key, the left turn key and the right turn key, the controller controls the electric roller 17 through the roller driving circuit, so that maintenance personnel can move the lifting device on the working platform 3 conveniently.

Further, a ladder stand 4 for climbing is arranged on the fence 37 on one side; diagonal braces are supported between the ladder 4 and the underside of the work platform 3. The ladder stand 4 is convenient for maintenance personnel to climb on the working platform 3; utilize the diagonal brace to support cat ladder 4, guaranteed cat ladder 4's stability.

Further, a tool box 7 is arranged on the working platform 3; the tool box 7 is covered with a cover plate 8, and a handle 9 is provided on the cover plate 8. The tool box 7 is used for storing maintenance tools conveniently; the cover plate 8 is dust-proof.

Further, the support branch comprises a support sleeve 19, a protection sleeve 20, a secondary driving bevel gear 25, a transmission rod 26, a support screw 21 and a support plate 22;

one end of each of the four support sleeves 19 is fixed on each of the four vertical side surfaces of the support base 1, and the four support sleeves 19 are distributed in a cross shape; the protective sleeve 20 is a cylindrical tube with two closed ends; a sleeve through hole 38 is formed at each of the two closed ends of the protective sleeve 20; the protective sleeve 20 is vertically fixed on the other end of the support sleeve 19; a base cavity 41 is arranged in the supporting base 1; one end of the transmission rod 26 extends into the protective sleeve 20, and a secondary driving bevel gear 25 is mounted on the end; the other end of the transmission rod 26 penetrates through the support sleeve 19 and then extends into the base cavity 41; the supporting driving mechanism is arranged in the base cavity 41 and synchronously drives the four transmission rods 26 to rotate; the support screw 21 penetrates through the two sleeve through holes 38; a transmission internal thread sleeve 27 is rotatably arranged in the protective sleeve 20 through a bearing 32, and the supporting screw 21 is screwed on the transmission internal thread sleeve 27; a secondary driven bevel gear 24 is coaxially arranged on the outer pipe wall of the transmission internal thread sleeve 27, and the secondary driven bevel gear 24 is meshed with a secondary driving bevel gear 25; the support plate 22 is fixed to the lower end of the support screw 21.

By means of the matching among the supporting screw 21, the transmission internal thread sleeve 27, the four secondary driving bevel gears 25 and the four secondary driven bevel gears 24, the four supporting plates 22 are ensured to be synchronously supported downwards under the driving of the supporting driving mechanism, so that the stability of the supporting base 1 is ensured, and the toppling is prevented.

Further, the supporting driving mechanism comprises a supporting driving motor 34, a primary driving bevel gear 35 and four primary driven bevel gears 33;

four first-stage driven bevel gears 33 are respectively arranged on the end parts of the four transmission rods 26 extending into the base cavity 41; the support driving motor 34 is installed in the base cavity 41; a primary driving bevel gear 35 is mounted on an output shaft of the support driving motor 34, and the primary driving bevel gear 35 is meshed with the four primary driven bevel gears 33 at the same time;

a supporting driving circuit electrically connected with the controller is arranged in the control box 5; the supporting driving circuit is electrically connected with the supporting driving motor 34, and the controller drives the supporting driving motor 34 to rotate through the supporting driving circuit; the control handle 6 is provided with a supporting lifting key and a supporting releasing key which are electrically connected with the controller.

The four driving rods 26 are driven and controlled to synchronously rotate by the supporting and driving motor 34 by utilizing the matching between the primary driving bevel gear 35 and the four primary driven bevel gears 33, so that the four supporting plates 22 are ensured to synchronously support downwards; by using the supporting and lifting key and the supporting and releasing key, the supporting and driving motor 34 is controlled by the controller to rotate, so that the maintenance personnel can conveniently control the four supporting plates 22 to be supported on the ground to position and support the lifting device.

Further, a sliding groove 23 is arranged on the supporting screw 21 along the length direction; the wall of each of the two sleeve through holes 38 is provided with a slide block which is in sliding fit with the sliding groove 23. The vertical movement of the supporting screw 21 is ensured by the cooperation between the slide groove 23 and the slide block.

Further, a non-slip pad 39 is provided on the lower side surface of the support plate 22. The anti-skid pad 39 is used for preventing skid, and the stability of the support is further ensured.

Further, the primary lifting driving mechanism comprises a lifting platform 31, a U-shaped plate 11, a primary lifting driving motor 10 and a primary transmission screw 30;

two rectangular holes are arranged in the middle of the lifting platform 31; a primary internal thread sleeve 29 is vertically fixed between the two rectangular holes in the middle of the lifting platform 31 in a penetrating manner; two vertical side plates of the U-shaped plate 11 penetrate through the two rectangular holes and are fixed on the upper side surface of the supporting base 1;

the primary lifting driving motor 10 is arranged on the upper side surface of the U-shaped plate 11, and an output shaft of the primary lifting driving motor 10 downwards penetrates through the upper side plate of the U-shaped plate 11; the upper end of the primary transmission screw 30 is butted on the output shaft penetrating end of the primary lifting drive motor 10, the lower end of the primary transmission screw 30 is rotatably supported on the upper side surface of the support base 1, and the middle part of the primary transmission screw 30 is screwed on the primary internal thread sleeve 29; the second-stage lifting driving mechanism is arranged on the lifting platform 31 and the working platform 3 adjusts the height;

a first-stage lifting drive circuit electrically connected with the controller is arranged in the control box 5; the first-stage lifting driving circuit is electrically connected with the lifting driving motor 10, and the controller drives the first-stage lifting driving motor 10 to rotate through the first-stage lifting driving circuit; the control handle 6 is provided with a first-level ascending key and a first-level descending key which are electrically connected with the controller.

The primary adjustment of the height position of the lifting platform 31 is realized by the matching between the primary transmission screw 30 and the primary internal thread sleeve 29; the lifting platform 31 is prevented from rotating in the lifting process by the matching of the two vertical side plates of the U-shaped plate 11 and the two rectangular holes; the controller controls the first-level lifting driving motor 10 to rotate by utilizing the first-level lifting key and the first-level descending key, so that maintenance personnel can conveniently adjust the height position of the lifting platform 31 on the lifting platform 31.

Further, the secondary lifting driving mechanism comprises a secondary lifting driving motor 12, four secondary internal threaded pipes 13 and four secondary transmission screws 16;

a mounting cavity 40 is arranged in the lifting platform 31; the four secondary internal threaded pipes 13 are vertically installed on the upper side surface of the lifting platform 31 in a rotating mode, and the lower ends of the four secondary internal threaded pipes 13 extend into the installation cavity 40; the four secondary internal thread pipes 13 are distributed on four equal division points of the same circumference, and the primary transmission screw 30 is positioned at the center of the circle; the extending ends of the four secondary internal thread pipes 13 are respectively provided with a driven chain wheel 28; the secondary lifting driving motor 12 is arranged on the upper side surface of the lifting platform 31, and an output shaft of the secondary lifting driving motor 12 extends into the mounting cavity 40; a driving chain wheel 30 is arranged at the extending end of the output shaft of the secondary lifting driving motor 12; the driving chain wheel 30 is simultaneously matched with the four driven chain wheels 28 for transmission through a chain; the upper ends of the four secondary transmission screw rods 16 are all fixed on the bottom surface of the working platform 3, and the lower ends of the four secondary transmission screw rods 16 are respectively screwed on the upper ends of the four secondary internal threaded pipes 13;

a secondary lifting drive circuit electrically connected with the controller is arranged in the control box 5; the second-stage lifting driving circuit is electrically connected with the second-stage lifting driving motor 12, and the controller drives the second-stage lifting driving motor 12 to rotate through the second-stage lifting driving circuit; a second-level ascending key and a second-level descending key which are electrically connected with the controller are arranged on the control handle 6.

The four driven chain wheels 28, the driving chain wheel 30, the chain, the four secondary internal thread pipes 13 and the four secondary transmission screw rods 16 are matched, so that the secondary adjustment of the height position of the lifting platform 31 is realized, and meanwhile, the four secondary transmission screw rods 16 are driven to synchronously ascend or descend by the secondary lifting driving motor 12, so that the stable ascending and descending of the working platform 3 are ensured; the second-level lifting driving motor 12 is controlled to rotate by the controller by utilizing the second-level lifting key and the second-level descending key, so that the height position of the lifting platform 31 can be further adjusted by maintenance personnel conveniently.

Further, two guide holes are arranged on the lifting platform 31; two guide rods 14 are fixed on the upper side surface of the supporting base 1, and the upper ends of the two guide rods 14 respectively penetrate through two guide holes.

The guide holes are matched with the guide rods 14, so that the lifting stability of the lifting platform 31 is guaranteed.

In the lifting device for 320 airplane maintenance, the controller adopts the existing ARM processor module and is used for realizing coordination control; the electric roller 17 is an existing electric roller and is used for realizing the movement of the lifting device; the supporting driving motor 34, the primary lifting driving motor 10 and the secondary lifting driving motor 12 are all existing stepping motors; the supporting driving circuit, the first-level lifting driving circuit and the second-level lifting driving circuit all adopt corresponding stepping motor driving circuits.

When the lifting device for 320 aircraft maintenance provided by the invention is installed and used, a maintenance worker climbs the working platform 3 through the ladder stand 4, then takes up the control handle 6 to press the forward key, the backward key, the left-turn key or the right-turn key, and after receiving signals, the controller coordinately controls the two electric rollers 17 through the roller driving circuit to move the lifting device to a specified position; then, a supporting and lifting key is pressed down, the controller receives signals and then drives a supporting and driving motor 34 to rotate through a supporting and driving circuit, so that the four supporting screws 21 drive the four supporting plates 22 to synchronously support downwards on the ground; then, the height is adjusted by pressing the first-stage ascending key, the controller receives a signal and then drives the first-stage ascending driving motor 10 to rotate through the first-stage ascending driving circuit, the first-stage transmission screw 30 rotates to drive the ascending platform 31 to ascend, the second-stage ascending driving mechanism ascends along with the ascending platform 31, then the height is further adjusted by pressing the second-stage ascending key or the second-stage descending key, the controller receives a signal and then drives the second-stage ascending driving motor 12 to rotate through the second-stage ascending driving circuit, the four second-stage internal thread pipes 13 rotate to drive the four second-stage transmission screws 16 to ascend synchronously, and the working platform 3 stably ascends to a specified position.

As noted above, while the present invention has been shown and described with reference to certain preferred embodiments, it is not to be construed as limited thereto. Various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.