CN219058342U - Telescopic door frame lifting device - Google Patents

Abstract

The application discloses an expansion type gantry crane device, which comprises an expansion gantry and a crane device; the telescopic door frame comprises a frame, a frame telescopic mechanism and a plurality of supporting legs; the frame is formed by splicing two fixed beams and two telescopic beams; the two fixed beams are parallel to each other and are connected by the telescopic beam; the frame telescopic mechanism is used for providing power, so that the two fixed beams are mutually telescopic away from or close to each other along the telescopic direction of the telescopic beams; the support legs are telescopic support legs and are connected to the fixed beams, and the support legs are used for supporting the frame; each fixed beam is provided with at least two supporting legs, and connecting rods are arranged between the supporting legs, so that synchronous and stable extension and retraction among the supporting legs are guaranteed, and the problem that the supporting legs in the telescopic portal are asynchronous in extension and retraction is effectively solved; the hoisting device is arranged on the telescopic portal frame and used for hoisting operation. The frame telescopic mechanism enables the two fixed beams to shrink along the telescopic beams, and the height is reduced by utilizing the shrinkage of the supporting legs, so that the space occupied by the frame can be effectively reduced.

Description

Telescopic door frame lifting device

Technical Field

The application relates to the technical field of hoisting equipment, in particular to an expansion type door frame hoisting device.

Background

Gantry cranes (including gantry cranes) are widely used for hoisting and moving operations of goods distribution areas such as factories, wharfs and the like. The common portal crane mainly moves by paving a preset track on the ground, generally works in a fixed field range, cannot realize transition work, and is very troublesome in process unless being reinstalled, disassembled and assembled. When the use area is large and cargoes are scattered, a plurality of devices are needed to be put into, the fund input is large, and the use rate is low; meanwhile, the synchronous telescoping stability of each supporting leg of the existing telescopic door frame is poor.

How to conveniently and rapidly realize stable telescopic support and transition operation of the portal crane is a technical problem to be solved urgently by the person skilled in the art.

Disclosure of Invention

To solve the above-mentioned problems, a first object of the present utility model is to provide an expansion type door frame lifting device; the telescopic gantry crane provided by the application can be conveniently and rapidly contracted and transported when the transition is needed, and the problem that the conventional gantry crane is difficult to transition due to fixed operation places is solved; and each landing leg on the same side in the telescopic portal is connected by a connecting rod, so that the stability of synchronous telescoping of the landing legs is improved.

The technical scheme provided by the utility model is as follows:

an expansion type door frame lifting device comprises an expansion door frame and a lifting device;

the telescopic door frame comprises a frame, a frame telescopic mechanism and a plurality of supporting legs;

the frame is formed by splicing two fixed beams and two telescopic beams; the two fixed beams are parallel to each other and are connected by the telescopic beam;

the frame telescopic mechanism is used for providing power, so that the two fixed beams are mutually telescopic away from or close to each other along the telescopic direction of the telescopic beams;

the support legs are telescopic support legs and are connected to the fixed beams, and the support legs are used for supporting the frame;

each fixed beam is provided with at least two supporting legs, connecting rods are arranged between the supporting legs, and the connecting rods are used for ensuring synchronous telescoping stability of the supporting legs;

the hoisting device is arranged on the telescopic portal frame and used for hoisting operation.

Further, the supporting leg is a telescopic oil cylinder mechanism; the telescopic oil cylinder mechanism is a primary telescopic oil cylinder or a multi-stage telescopic oil cylinder;

the primary telescopic cylinder comprises a basic section cylinder body and an telescopic section cylinder body which are connected, and the outer side wall of the end part of the basic section cylinder body is connected with a travelling wheel; the outer side walls of the end parts of the telescopic joint cylinders of two adjacent supporting legs in each fixed beam are provided with the connecting rods to be connected;

the multi-stage telescopic cylinder comprises a basic section cylinder body and at least two sections of telescopic section cylinder bodies which are sequentially connected; the outer side wall of the end part of the secondary expansion joint cylinder body of the multi-stage expansion cylinder is connected with a travelling wheel; the outer side walls of the end parts of the final expansion joint cylinders of the multistage expansion cylinders of two adjacent support legs in each fixed beam are provided with connecting rods for connection.

Further, the end part of the primary telescopic oil cylinder is provided with a foot pad for contacting the ground; or, the end part of the multi-stage telescopic oil cylinder is provided with a foot pad for contacting the ground.

Further, the telescoping beam includes a base Liang Guanjie, a first telescoping beam section, and a second telescoping beam section; one end of the first telescopic beam section is inserted into one end of the base Liang Guanjie in a sliding manner, and the other end of the first telescopic beam section is connected with the first fixed beam;

one end of the second telescopic beam section is inserted into the other end of the base Liang Guanjie in a sliding manner; the other end of the second telescopic beam section is connected with a second fixed beam;

the frame telescoping mechanism is an oil cylinder, and two ends of the oil cylinder are respectively connected with two fixed beams. The first telescoping beam section and the second telescoping beam section are slidably retractable within the base Liang Guanjie.

Further, the lifting device comprises a movable trolley, a lifting mechanism, a movable trolley frame, a first translation mechanism and a second translation mechanism,

the lifting mechanism is arranged on the movable trolley and is used for lifting operation;

the movable trolley is slidably arranged in the movable trolley frame, and the first translation mechanism is used for providing power to drive the movable trolley to move along the X axis;

the movable trolley frame is slidably arranged in the frame, and the second translation mechanism is used for driving the movable trolley frame to move along the Y axis; and the X-axis is perpendicular to the Y-axis.

Further, rollers are arranged at two ends of the movable trolley frame, and the frame is provided with matched tracks; the movable trolley is provided with wheels which roll on the movable trolley frame.

Further, the track includes:

the middle rail is arranged on the basic beam pipe joint, and a first hinge point and a second hinge point are respectively arranged at two ends of the middle rail;

a first track connected to the first hinge point; and a second track connected to the second hinge point;

the first track can be folded and unfolded in a rotating way around a first hinge point; the second track can be rotationally folded and rotationally unfolded around a second hinge point;

the fixed beams are provided with lock catches, and the lock catches of the two fixed beams are respectively used for fixing connection of the first track and the second track in a rotating and unfolding state.

Further, the frame is provided with 4 telescopic beams, two telescopic beams form a group, and each group of telescopic beams Liang Nafen is provided with 1-2 lifting devices respectively.

Further, the hoisting mechanism comprises a hoisting rope, a fixed pulley, a movable pulley and a power mechanism, wherein the movable pulley is arranged at the output end of the power mechanism and is close to or far from the fixed pulley;

the lifting rope is wound around the peripheries of the fixed pulley and the movable pulley, and is provided with a lifting appliance, and the object is lifted or put down along with the movement of the movable pulley.

Further, the lifting appliance is detachably connected with the lifting rope.

The utility model provides a problem to prior art exists, this application provides an expansion gate frame hoisting device, including expansion gate frame and hoisting accessory, wherein expansion gate frame is jack-up bearing mechanism, and hoisting accessory then is hoist and mount operating mechanism, and the main use object is jack-up and is transported. The telescopic door frame comprises a frame, a frame telescopic mechanism and a plurality of supporting legs; the connecting rods are arranged between two adjacent supporting legs in each fixed beam to be connected, synchronous and stable expansion and contraction among the supporting legs are guaranteed, and the problem that the supporting legs in the expansion and contraction door frame are asynchronous in expansion and contraction is effectively solved. Simultaneously, the two fixed beams are contracted along the telescopic beams by utilizing the framework telescopic mechanism, and the height is reduced by utilizing the contraction of the supporting legs, so that the space occupied by the framework can be effectively reduced; therefore, when the telescopic portal crane needs to be transferred, the telescopic portal crane is convenient and quick to retract and transport, the problems of fixed operation place, large occupied space and difficult transfer of the conventional portal crane are solved, and the telescopic portal crane can be automatically unfolded for operation after being transported to an operation production place, so that the telescopic portal crane has strong environmental adaptability.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a telescopic door frame jack (deployed state) according to an embodiment of the present utility model;

FIG. 2 is a schematic view of a telescopic door frame lifting device according to an embodiment of the present utility model (folded state);

FIG. 3 is a schematic view of a telescopic mast according to an embodiment of the present utility model;

FIG. 4 is a top view (telescopic beam perspective) of a telescoping door frame according to an embodiment of the present utility model;

FIG. 5 is a top view of a telescoping door frame according to an embodiment of the present utility model;

FIG. 6 is a top view of a lifting device mounted to a telescoping door frame in accordance with an embodiment of the present utility model;

FIG. 7 is a schematic cross-sectional view of a lifting device (a movable pulley is driven by a power mechanism to extend and retract) according to an embodiment of the present utility model;

FIG. 8 is a schematic cross-sectional view of a lifting device (a movable pulley is driven by a power mechanism to extend and retract, and S1 and S2 are two positions of a lifted object) according to an embodiment of the utility model;

reference numerals: 1-a telescopic portal; 11-a frame; 111-fixing beams; 112-telescoping beams; 1121-base Liang Guanjie, 1122-first telescopic girder section; 1122-a second telescopic beam section; 113-track; 1131-intermediate track; 1132-first track; 1133-a second track; 12-a frame telescoping mechanism; 13-supporting legs; 131-basic section cylinder; 132-telescopic joint cylinder; 133-travelling wheels; 134-foot pad; 14-connecting rods; 15-locking; 2-a hoisting device; 21-a mobile trolley; 22-a hoisting mechanism; 221-lifting ropes; 222-fixed pulley; 223-moving a pulley; 224-a power mechanism; 23-moving the trolley frame; 231-rollers; 24-a first translation mechanism; 25-a second translation mechanism.

Detailed Description

In order to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below, and it is obvious that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present application and simplify description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" or "a number" is two or more, unless explicitly defined otherwise.

It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for illustration purposes only and should not be construed as limiting the scope of the present disclosure, since any structural modifications, proportional changes, or dimensional adjustments made by those skilled in the art should not be made in the present disclosure without affecting the efficacy or achievement of the present disclosure.

As shown in fig. 1-8, an embodiment of the present utility model provides a telescopic door frame lifting device, which includes a telescopic door frame 1 and a lifting device 2; the telescopic portal 1 comprises a frame 11, a frame telescopic mechanism 12 and a plurality of supporting legs 13;

the frame is formed by splicing two fixed beams 111 and two telescopic beams 112; the two fixed beams are parallel to each other and are connected by the telescopic beam;

the frame telescopic mechanism 12 is used for providing power to enable the two fixed beams 111 to mutually stretch away from or approach to each other along the telescopic direction of the telescopic beams;

the supporting legs 13 are telescopic supporting legs, the supporting legs 13 are connected to the fixed beams 111, and the supporting legs 13 are used for supporting the frame 11;

each fixed beam 111 is provided with at least two supporting legs 13, and connecting rods 14 are arranged between the supporting legs and used for ensuring synchronous telescoping stability of the supporting legs;

the lifting device 2 is arranged on the telescopic portal frame 1 and is used for lifting operation.

The utility model provides a problem to prior art exists, this application provides an expansion gate frame hoisting device, including expansion gate frame and hoisting accessory, wherein expansion gate frame is jack-up bearing mechanism, and hoisting accessory then is hoist and mount operating mechanism, and the main use object is jack-up and is transported. The telescopic door frame comprises a frame, a frame telescopic mechanism and a plurality of supporting legs; the connecting rods are arranged between two adjacent supporting legs in each fixed beam to be connected, synchronous and stable expansion and contraction among the supporting legs are guaranteed, and the problem that the supporting legs in the expansion and contraction door frame are asynchronous in expansion and contraction is effectively solved. Simultaneously, the two fixed beams are contracted along the telescopic beams by utilizing the framework telescopic mechanism, and the height is reduced by utilizing the contraction of the supporting legs, so that the space occupied by the framework can be effectively reduced; therefore, when the telescopic portal crane needs to be transferred, the telescopic portal crane is convenient and quick to retract and transport, the problems of fixed operation place, large occupied space and difficult transfer of the conventional portal crane are solved, and the telescopic portal crane can be automatically unfolded for operation after being transported to an operation production place, so that the telescopic portal crane has strong environmental adaptability.

The legs 13 are preferably provided with four, six or more.

As a preferred embodiment, the supporting leg 13 is a telescopic oil cylinder mechanism; the telescopic oil cylinder mechanism is a primary telescopic oil cylinder or a multi-stage telescopic oil cylinder;

the primary telescopic cylinder comprises a basic section cylinder body 131 and an telescopic section cylinder body 132 which are connected, and the outer side wall of the end part of the basic section cylinder body is connected with a travelling wheel 133; the outer side walls of the end parts of the telescopic joint cylinders of two adjacent supporting legs in each fixed beam 111 are provided with the connecting rods 14 to be connected;

the multi-stage telescopic cylinder comprises a basic section cylinder body 131 and at least two telescopic section cylinder bodies 132 which are sequentially connected; the outer side wall of the end part of the secondary telescopic joint cylinder body of the multi-stage telescopic cylinder is connected with a travelling wheel 133; the connecting rods 14 are arranged on the outer side walls of the end parts of the last-stage telescopic joint cylinders of the multistage telescopic cylinders of two adjacent support legs in each fixed beam 111 and are connected.

The travelling wheel is preferably a universal wheel device, the universal wheel device comprises a wheel frame and a universal wheel arranged on the wheel frame, and the wheel frame is connected with the outer side wall of the end part of the telescopic joint cylinder body; after the telescopic cylinder contracts, the universal wheel device can be supported in a touching way, so that the omnidirectional movement of the telescopic door frame is realized; after the supporting legs shrink, the universal wheels on the supporting legs touch the supporting frame, so that the telescopic portal can move in all directions. Meanwhile, the supporting legs 13 are telescopic supporting legs, so that a higher working height can be provided when the telescopic supporting legs are unfolded, and the occupied space can be kept small when the telescopic supporting legs are contracted; through the height adjustment, the problem of fixed operation range of the conventional portal crane can be solved, and the portal crane has more flexibility.

As an alternative embodiment, the end part of the primary telescopic oil cylinder is provided with a foot pad 134 for contacting the ground; alternatively, the end of the multi-stage telescopic cylinder is provided with a foot pad 134 for contacting the ground. The foot pad is preferably a hemispherical support; the arrangement of the foot pad is beneficial to the stable ground contact support when the telescopic oil cylinder stretches.

As a preferred embodiment, the telescoping beam 112 includes a base Liang Guanjie 1121, a first telescoping beam joint 1122, and a second telescoping beam joint 1123; one end of the first telescopic beam section is inserted into one end of the base Liang Guanjie in a sliding manner, and the other end of the first telescopic beam section is connected with the first fixed beam; one end of the second telescopic beam section is inserted into the other end of the base Liang Guanjie in a sliding manner; the other end of the second telescopic beam section is connected with a second fixed beam; the frame telescoping mechanism 12 is an oil cylinder, and two ends of the oil cylinder are respectively connected with two fixed beams. The first telescoping beam section and the second telescoping beam section are slidably retractable within the base Liang Guanjie.

The two fixed beams in the frame are driven by the oil cylinder to slide and extend out of the base Liang Guanjie through the first telescopic beam section and the second telescopic beam section, and the frame is unfolded, so that the hoisting operation of the hoisting device is facilitated; simultaneously, the two fixed beams can also slide and shrink in the basic Liang Guanjie through the first telescopic beam section and the second telescopic beam section, and the frame is shrunk, so that the transportation and the walking of the telescopic door frame are facilitated.

As a preferred embodiment, the lifting device 2 comprises a travelling trolley 21, a lifting mechanism 22, a travelling trolley frame 23, a first translation mechanism 24 and a second translation mechanism 25,

the lifting mechanism 22 is arranged on the mobile trolley 21 and is used for lifting operation;

the movable trolley 21 is slidably arranged in the movable trolley frame 23, and the first translation mechanism 24 is used for providing power to drive the movable trolley 21 to move along the X axis;

the movable trolley frame 23 is slidably arranged in the frame 11, and the second translation mechanism 25 is used for driving the movable trolley frame 23 to move along the Y axis; and the X-axis is perpendicular to the Y-axis.

By slidably arranging the travelling carriage 21 in the travelling carriage frame 23 and translating it under the drive of the first translation mechanism 24, the transverse span of the entire gantry crane can be adjusted. The movement of the travelling carriage 23 in the frame 11 then effects translation of the hoisted object.

The utility model provides a folding door frame hoisting device, hoisting accessory 2 remove in the plane that X axle and Y axle are constituteed, realize through travelling car 21, hoisting mechanism 22, travelling car frame 23, first translation mechanism 24 and second translation mechanism 25.

Specifically, the travelling car 21 moves in the travelling car frame 23, and the motive power for the movement is provided by the first translation mechanism 24; the whole of the travelling carriage 23 together with the travelling carriage 21 is movable within the frame 11, the motive power for the movement being provided by a second translation mechanism 25. By setting the moving direction of the traveling carriage 21 to be perpendicular to the moving direction of the traveling carriage 23, the traveling carriage 21 can be moved in a plane, so that the hoisting mechanism 22 on the traveling carriage 21 can be moved in a plane, and the hoisting operation can be performed at each position.

As an alternative embodiment, the two ends of the movable trolley frame 23 are provided with rollers 231, and the frame 11 is provided with matched rails 113; the travelling car 21 is provided with wheels which roll on travelling carriages 23.

The movement of the mobile trolley 23 is preferably achieved by means of rollers 231 cooperating with the track 113. Specifically, the rollers 231 are disposed at two ends of the moving trolley frame 23, and the matched rails 113 are disposed on the frame 11, and the rollers 231 can flexibly roll and walk in the rails and can avoid falling off.

The moving trolley 21 can move in the moving trolley frame 23 by arranging wheels to be matched with the moving trolley frame 23. I.e. the movable trolley frame is provided with a runway for wheels to walk. The first translation mechanism 24 and the second translation mechanism 25 can use oil cylinders, and movement is realized through oil cylinder expansion and contraction.

More preferably, the track 113 includes: the middle rail 1131 is arranged on the basic beam pipe joint, and the two ends of the middle rail are respectively provided with a first hinge point and a second hinge point; a first track 1132 connected to the first hinge point; and a second track 1133 connected to the second hinge point; the first track can be folded and unfolded in a rotating way around a first hinge point; the second track can be rotationally folded and rotationally unfolded around a second hinge point; the fixed beams are provided with lock catches, and the lock catches of the two fixed beams are respectively used for fixing connection of the first track and the second track in a rotating and unfolding state.

In an initial state, two ends of the lifting device are respectively slidably arranged on the middle rails of the two telescopic beams, and specifically, a sliding block structure matched with the rails to slide is arranged in the lifting device.

A row of round holes are formed in the side walls of the telescopic Liang Zhongdi telescopic beam section and the second telescopic beam section along the length direction, and a row of cylindrical rods are correspondingly arranged in the side walls of the first rail and the second rail along the length direction; after the telescopic beam is driven to be unfolded by the frame telescopic mechanism, the first track can rotate to a side wall round hole of the first telescopic beam section by virtue of a first hinge point, and the end part of the first track is connected with a lock catch of the first fixed beam for fixation; the second track can rotate to a side wall round hole of the second telescopic beam section by virtue of a second hinge point, and the end part of the second track is connected with a lock catch of the second fixed beam for fixation; the first track and the second track can rotate into a row of round holes on the side face of the telescopic beam after the retractable frame is unfolded left and right, and are respectively and fixedly connected with the locking positions of the two fixed beams to be locked and fixed, so that a Y-axis moving track of the lifting device is formed. It should be noted that the first rail and the second rail may be manually biased to rotate about the first hinge point and the second hinge point; the rotary motor can be arranged below the rotating shafts (hinge shafts) of the first hinge point and the second hinge point to drive the track to rotate.

As a preferred embodiment, the frame 11 is provided with 4 telescopic beams 112, two telescopic beams 112 forming a group, each group of telescopic beams Liang Nafen being provided with 1-2 hoisting means 2. The telescopic gantry crane provided by the application is provided with two or four lifting devices 2, and can be used respectively or combined, so that the problem that the conventional gantry crane is single in operation and can swing frequently when lifting long objects is solved, and the telescopic gantry crane has flexibility.

Preferably, the lifting mechanism 22 comprises a lifting rope 221, a fixed pulley 222, a movable pulley 223 and a power mechanism 224, wherein the movable pulley 223 is arranged at the output end of the power mechanism 224 and is mutually close to or far from the fixed pulley 222;

the hoist rope 221 is wound around the outer circumferences of the fixed pulley 222 and the movable pulley 223, and the hoist rope 221 is provided with a hoist to hoist or lower an object with the movement of the movable pulley 223.

In the above scheme, the lifting rope is preferably a steel wire rope, the power mechanism is preferably an oil cylinder, the distance between the movable pulley 223 and the fixed pulley 222 is increased or shortened through the telescopic action of the power mechanism 224, so that the steel wire rope 221 is pulled or loosened, the hanging part of the steel wire rope 221, namely the part provided with the lifting appliance, moves upwards or downwards, and the object is lifted or put down. The movable pulley 223 is arranged at the output end of the oil cylinder, and the fixed pulley 222 is arranged at the output end of the fixed end of the oil cylinder and the fixed end of the oil cylinder respectively belong to the two ends of the oil cylinder. The power of the lifting can also be transmitted using a screw or other means.

Further, the hanger is detachably connected with the hanging rope 221. The lifting appliance is detachably connected with the steel wire rope 221, so that different special lifting appliances can be replaced according to different working condition requirements.

The telescopic door frame lifting device has the advantages that the telescopic door frame is provided with a multi-pivot door frame bearing structure through the plurality of supporting legs, and the lifting operation stability is good. Meanwhile, the height and the transverse span of the telescopic door frame lifting device can be adjusted in a telescopic mode, and the transverse span of the door frame is large during lifting operation, so that the lifting operation is stable; meanwhile, the method is beneficial to preventing unbalanced load and tipping. The telescopic door frame lifting device is provided with a plurality of groups of lifting devices, can be used independently or in combination, and has high flexibility; in addition, the telescopic portal frame and the supporting legs can move through universal wheels after being contracted, and then move to an operation position to be unfolded for operation after being transported to an operation place, so that the environment adaptability is high.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. The telescopic door frame lifting device is characterized by comprising a telescopic door frame (1) and a lifting device (2);

the telescopic portal frame (1) comprises a frame (11), a frame telescopic mechanism (12) and a plurality of supporting legs (13);

the frame is formed by splicing two fixed beams (111) and two telescopic beams (112); the two fixed beams are parallel to each other and are connected by the telescopic beam;

the frame telescopic mechanism (12) is used for providing power, so that the two fixed beams (111) are mutually telescopic away from or close to each other along the telescopic direction of the telescopic beams;

the support legs (13) are telescopic support legs, the support legs (13) are connected to the fixed beams (111), and the support legs (13) are used for supporting the frame (11);

each fixed beam (111) is provided with at least two supporting legs (13), a connecting rod (14) is arranged between the supporting legs, and the connecting rod is used for ensuring synchronous telescoping stability of the supporting legs;

the lifting device (2) is arranged on the telescopic portal frame (1) and is used for lifting operation.

2. Telescopic door frame lifting device according to claim 1, characterized in that the leg (13) is a telescopic cylinder mechanism; the telescopic oil cylinder mechanism is a primary telescopic oil cylinder or a multi-stage telescopic oil cylinder;

the primary telescopic cylinder comprises a basic section cylinder body (131) and an telescopic section cylinder body (132) which are connected, and the outer side wall of the end part of the basic section cylinder body is connected with a travelling wheel (133); the outer side walls of the end parts of the telescopic joint cylinders of two adjacent supporting legs (13) in each fixed beam (111) are provided with connecting rods (14) to be connected;

the multistage telescopic cylinder comprises a basic section cylinder body (131) and at least two sections of telescopic section cylinder bodies (132) which are connected in sequence; the outer side wall of the end part of the secondary expansion joint cylinder body of the multi-stage expansion cylinder is connected with a travelling wheel (133); the connecting rods (14) are arranged on the outer side walls of the end parts of the final telescopic joint cylinders of the multistage telescopic cylinders of two adjacent supporting legs (13) in each fixed beam (111) and are connected.

3. The telescopic door frame lifting device according to claim 2, wherein the end of the primary telescopic cylinder is provided with a foot pad (134) for contacting the ground; or, the end part of the multi-stage telescopic oil cylinder is provided with a foot pad (134) for contacting the ground.

4. A telescopic door frame lifting device according to any one of claims 1-3, wherein the telescopic beam (112) comprises a base Liang Guanjie (1121), a first telescopic beam section (1122) and a second telescopic beam section (1123); one end of the first telescopic beam section is inserted into one end of the base Liang Guanjie in a sliding manner, and the other end of the first telescopic beam section is connected with the first fixed beam;

one end of the second telescopic beam section is inserted into the other end of the base Liang Guanjie in a sliding manner; the other end of the second telescopic beam section is connected with a second fixed beam; the frame telescoping mechanism is an oil cylinder, and two ends of the oil cylinder are respectively connected with two fixed beams.

5. The telescopic door frame lifting device according to claim 4, wherein the lifting device (2) comprises a travelling trolley (21), a lifting mechanism (22), a travelling trolley frame (23), a first translation mechanism (24) and a second translation mechanism (25),

the lifting mechanism (22) is arranged on the mobile trolley (21) and is used for lifting operation;

the movable trolley (21) is slidably arranged in the movable trolley frame (23), and the first translation mechanism (24) is used for providing power to drive the movable trolley (21) to move along the X axis;

the movable trolley frame (23) is slidably arranged in the frame (11), and the second translation mechanism (25) is used for driving the movable trolley frame (23) to move along the Y axis; and the X-axis is perpendicular to the Y-axis.

6. The telescopic door frame lifting device according to claim 5, characterized in that the two ends of the moving trolley frame (23) are provided with rollers (231), and the frame (11) is provided with matched rails (113);

the travelling car (21) is provided with wheels which roll on a travelling car frame (23).

7. The telescoping door frame jack of claim 6, wherein said track (113) comprises:

the middle rail (1131) is arranged on the basic beam pipe joint, and the two ends of the middle rail are respectively provided with a first hinge point and a second hinge point;

a first track (1132) connected to the first hinge point; and a second track (1133) connected to the second hinge point;

the first track (1132) can be folded and unfolded in a rotating way around a first hinge point; the second track (1133) can be folded and unfolded rotationally around a second hinge point;

the fixed beams (111) are respectively provided with a lock catch (15), and the lock catches of the two fixed beams are respectively used for fixedly connecting the first track and the second track in a rotating and unfolding state.

8. The telescopic door frame lifting device according to claim 6, wherein the frame (11) is provided with 4 telescopic beams (112), two telescopic beams (112) form a group, and each group of telescopic beams Liang Nafen is provided with 1-2 lifting devices (2).

9. The telescopic door frame lifting device according to claim 5, wherein the lifting mechanism (22) comprises a lifting rope (221), a fixed pulley (222), a movable pulley (223) and a power mechanism (224), and the movable pulley (223) is arranged at the output end of the power mechanism (224) and is close to or far from the fixed pulley (222);

the lifting rope (221) is wound on the peripheries of the fixed pulley (222) and the movable pulley (223), and the lifting rope (221) is provided with a lifting appliance, so that an object is lifted or put down along with the movement of the movable pulley (223).

10. The telescopic door frame lifting device according to claim 9, wherein the lifting appliance is detachably connected to the lifting rope (221).

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