Lifting device for preassembling process of aero-engine

Abstract

The invention provides a lifting device for the preassembling process of an aero-engine, and belongs to the technical field of aero-engines, the lifting device comprises a lifting system, a first-layer inlet platform, a second-layer outlet platform, a test piece, a foundation pit embedded part and an energy storage device, the lifting system comprises a main frame, a lifting table top, a counterweight system and a transmission system, the upper portion of the transmission system is hung on the main frame and fixed to a foundation pit embedded part. The four corners of the lifting table-board are connected with the transmission system and move up and down along the frame of the main frame; a test piece is fixed on the lifting table-board; one end of the counterweight system is connected with the side edge of the lifting tabletop, the top is movably connected to the top of the main frame, and the other end of the counterweight system is fixed to a foundation pit embedded part and used for balancing the load of the lifting tabletop acting on the transmission system; the lifting table top and the counterweight system are respectively provided with an energy feedback module, and the energy feedback modules are connected with the energy storage device. The safety, the stability and the energy utilization rate of the device are effectively improved, and safe and efficient transfer of test pieces is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of aero-engines, and particularly relates to a lifting device for a pre-assembly process of an aero-engine. BACKGROUND

[0002] In order to improve the installation and test efficiency in the test stage of an aero-engine, the lifting structure, the transportation structure and the main and auxiliary support points of the test piece are fully utilized, the pre-assembly idea in the preparation workshop is adopted, and the test piece is quickly lifted onto and off the platform to improve the use efficiency of the test equipment. In the test pre-assembly process, the test piece needs to be transferred from the first floor to the second floor platform. At present, the test piece is transferred by using a crane in the workshop. For a test with a large size, the overall weight reaches the order of magnitude of 50 tons. If the lifting method is used, the transfer efficiency is not high, and the test piece and the operator also have safety risks. SUMMARY

[0003] Therefore, the embodiment of the present application provides a lifting device for a pre-assembly process of an aero-engine, which at least partially solves the problems of low transfer efficiency and safety risks of the test piece and the operator in the test pre-assembly process in the prior art.

[0004] The embodiment of the present application provides a lifting device for a pre-assembly process of an aero-engine. The device comprises a lifting system, a first floor entrance platform, a second floor exit platform, a test piece, a foundation pit embedded part and an energy storage device. The lifting system and the energy storage device are fixed to the foundation pit embedded part. The first floor entrance platform is located below one side of the lifting system, and the second floor exit platform is located above the other side of the lifting system. The lifting system comprises a main frame, a lifting platform, a counterweight system and a transmission system. The main frame is a frame structure. The upper part of the transmission system is suspended on the main frame, and the bottom of the transmission system is fixed to the foundation pit embedded part. The four corners of the lifting platform are connected with the transmission system and move up and down along the frame of the main frame. The test piece is fixed to the lifting platform. One end of the counterweight system is connected with the side of the lifting platform, the top of the counterweight system is movably connected with the top of the main frame, and the other end of the counterweight system is fixed to the foundation pit embedded part. The counterweight system is used to balance the load of the lifting platform acting on the transmission system. The lifting platform and the counterweight system are respectively provided with a regenerative module, and the regenerative module is connected with the energy storage device.

[0005] According to a specific implementation manner of the embodiment of the present application, the frame of the main frame comprises four columns. The four columns are respectively located at the four corners of the main frame. The four columns are vertically fixed to the foundation pit embedded part. The columns located in the width direction of the main frame are fixedly connected through a connecting cross beam. The columns located in the length direction of the main frame are fixedly connected through a longitudinal beam. The longitudinal beam is fixed to the top of the column. The lower surface of the longitudinal beam is provided with a main frame pulley mounting rack. The main frame pulley mounting rack is movably connected with the top of the counterweight system.

[0006] According to a specific implementation manner of the embodiment of the application, the lifting platform comprises a force-bearing platform, four corners of the force-bearing platform are respectively provided with a force-bearing platform force transmission member and a guide wheel assembly, the force-bearing platform force transmission member is a boss structure formed by outward extension of the force-bearing platform, and the force-bearing platform force transmission member is connected with the transmission system; each guide wheel assembly comprises left and right guide wheel devices and front and rear guide wheel devices, the left and right guide wheel devices are located on the lower surface of the force-bearing platform, the front and rear guide wheel devices are located on the upper surface of the force-bearing platform, the mounting directions of the left and right guide wheel devices and the front and rear guide wheel devices are perpendicular, one side surface of each column is provided with a lifting platform left and right limiting block, the other side surface of each column is provided with a lifting platform front and rear limiting block, the left and right guide wheel devices are in sliding connection with the lifting platform left and right limiting blocks, and the front and rear guide wheel devices are in sliding connection with the lifting platform front and rear limiting blocks; the side edge of the force-bearing platform in the length direction is provided with a force-bearing structure, and the force-bearing structure is connected with one end of the counterweight system.

[0007] According to a specific implementation manner of the embodiment of the application, the left and right guide wheel devices and the front and rear guide wheel devices are the same in structure, and each comprises a guide wheel, a guide wheel frame, a damping device connecting piece, a guide wheel device fixing seat, an elastic module, a damping module, a damping energy feedback module and a damping device fixing piece, the elastic module, the damping module, the damping energy feedback module and the damping device fixing piece are sequentially connected and fixed on the guide wheel device fixing seat, the bottom of the guide wheel device fixing seat is fixed on the force-bearing platform, the elastic module is located at the opening end of the guide wheel device fixing seat, the elastic module is connected with the guide wheel frame through the damping device connecting piece, the guide wheel is fixed on the guide wheel frame, the guide wheels of the left and right guide wheel devices are in sliding connection with the lifting platform left and right limiting blocks, and the guide wheels of the front and rear guide wheel devices are in sliding connection with the lifting platform front and rear limiting blocks; the damping energy feedback module is connected with the energy storage device, and the damping energy feedback module is used to collect momentum generated by shaking of the lifting platform in a movement process and convert the momentum into electric energy through the elastic module and the damping module.

[0008] According to a specific implementation manner of the embodiment of the application, the transmission system comprises a power assembly and four lifting modules, each of the lifting modules comprises a lifting module fixing seat, a thrust bearing assembly, a force sensor, an upper limit bearing, a trapezoidal screw, a load-bearing table fixing block, a transmission nut assembly, a lower limit bearing and a worm gear reducer, the worm gear reducer is connected with the power assembly, the lifting module fixing seat is fixedly connected on the stand column, the central mounting surface of the lifting module fixing seat, the thrust bearing assembly, the force sensor and the upper limit bearing are all provided with a central through hole, the force sensor is fixed on the upper side of the central mounting surface of the lifting module fixing seat, the upper part of the force sensor is fixed with the thrust bearing assembly, and the upper limit bearing is fixed on the lower side of the central mounting surface of the lifting module fixing seat; the upper end of the trapezoidal screw passes through the upper limit bearing, the central mounting surface of the lifting module fixing seat and the force sensor in sequence, the upper end of the trapezoidal screw is suspended and fixed on the rotating part of the thrust bearing assembly, and the trapezoidal screw realizes upward limiting through the upper limit bearing; the lower end of the trapezoidal screw is limited in the horizontal plane through the lower limit bearing, and the lower end of the trapezoidal screw and the lower side of the lower limit bearing are connected with the worm gear reducer; the trapezoidal screw is threadedly connected with the transmission nut assembly, the upper side of the transmission nut assembly is fixed with the load-bearing table fixing block, the load-bearing table fixing block is fixed with the edge corner of the lifting table, and the transmission nut assembly is driven to move up and down through the rotation of the trapezoidal screw, so as to drive the lifting table to move up and down.

[0009] According to a specific implementation manner of the embodiment of the application, the worm gear reducer comprises a coupling upper assembly, a coupling lower assembly, a worm gear assembly and a worm gear fixing block connected in sequence, the coupling upper assembly is connected with the lower end of the trapezoidal screw, the coupling upper assembly and the coupling lower assembly are in a mutual embedding structure in the vertical direction and are not limited in the vertical direction, the worm gear assembly is connected with the power assembly, and the worm gear fixing block is fixed on the foundation pit embedded part.

[0010] According to a specific implementation manner of the embodiment of the present application, the power assembly comprises a main drive motor, a commutator, and a transmission shaft, the commutator and the main drive motor are fixed on the foundation pit embedded part, the commutator comprises a first commutator, a second commutator and a third commutator, the transmission shaft comprises a first transmission shaft, a second transmission shaft, a third transmission shaft, a fourth transmission shaft, a fifth transmission shaft and a sixth transmission shaft, the output shaft of the main drive motor is connected with the first commutator, the two ends of the output shaft of the first commutator are respectively connected with one end of the fifth transmission shaft and one end of the sixth transmission shaft, the other end of the fifth transmission shaft is connected with the input shaft of the second commutator, the other end of the sixth transmission shaft is connected with the input shaft of the third commutator, the output shafts at the left and right ends of the second commutator are respectively connected with one end of the first transmission shaft and one end of the second transmission shaft, the output shafts at the left and right ends of the third commutator are respectively connected with one end of the third transmission shaft and one end of the fourth transmission shaft, and the other ends of the first transmission shaft, the second transmission shaft, the third transmission shaft and the fourth transmission shaft are respectively connected with the input shafts of the corresponding turbine worm assemblies.

[0011] According to a specific implementation manner of the embodiment of the present application, the counterweight system comprises a counterweight device, a main frame fixed pulley assembly and a steel wire rope assembly, the counterweight device comprises a counterweight mass, a counterweight fixed pulley assembly, a counterweight fixed pulley fixing block, a winding drum device fixing frame, a winding drum module, a drag force module, a winding drum drive motor and a counterweight device energy feedback module, the steel wire rope assembly comprises a first steel wire rope assembly, a second steel wire rope assembly and a third steel wire rope assembly, the main frame fixed pulley assembly is fixed on the main frame pulley mounting frame, one end of the first steel wire rope assembly and the second steel wire rope assembly is connected with the lifting point of the load bearing structure, the other end of the first steel wire rope assembly and the second steel wire rope assembly passes through the main frame fixed pulley assembly and is connected with one end of the counterweight mass, the other end of the counterweight mass is connected with one end of the third steel wire rope assembly, the other end of the third steel wire rope assembly is wound on the winding drum module after passing through the counterweight fixed pulley assembly, the winding drum module is connected with one end of the drag force module through a transmission shaft, the counterweight fixed pulley assembly is fixed on the counterweight fixed pulley fixing block, the winding drum module and the drag force module are fixed on the winding drum device fixing frame, the counterweight fixed pulley fixing block and the winding drum device fixing frame are fixed on the foundation pit embedded part, the other end of the drag force module is sequentially connected with the winding drum drive motor and the counterweight device energy feedback module, the counterweight device energy feedback module is connected with the energy storage device, and the counterweight device energy feedback module is used for collecting potential energy in the descending process of the lifting platform and converting the potential energy into electric energy.

[0012] According to a specific implementation manner of the embodiment of the present application, the width direction of the load bearing platform is provided with a lifting guardrail system and a turnover plate mechanism for protection in the lifting and descending process of the lifting platform, the turnover plate mechanism is fixed on one opposite side of the load bearing platform through a turnover hinge, the lifting guardrail system is located on the lower surface of the load bearing platform and corresponds to the position of the turnover plate mechanism, and the turnover plate mechanism, the lifting guardrail system and the lifting platform are linked.

[0013] According to a specific implementation manner of the embodiment of the application, the lifting guardrail system comprises a fixed guardrail, a first sliding block group, a guardrail force bearing frame, a transmission straight rack, a guardrail driving motor, a second sliding block group and a movable guardrail, the movable guardrail is fixed above the fixed guardrail, the fixed guardrail is connected with the left and right side supports of the guardrail force bearing frame through the first sliding block group and the second sliding block group respectively, the transmission straight rack is vertically fixed in the middle support of the guardrail force bearing frame, the guardrail driving motor is fixed in the middle support of the fixed guardrail, the guardrail driving motor is engaged with the transmission straight rack through a gear, and the up-down movement of the lifting guardrail system is realized by controlling the rotating direction of the guardrail driving motor.

[0014] Beneficial effects: The lifting device for the pre-assembly process of an aero-engine in the embodiment of the application can ensure that the axial force of the trapezoidal screw rod is a pulling force by suspending the upper part of the transmission system on the main frame, avoid the stability failure problem of the compression rod of the trapezoidal screw rod, improve the lateral stiffness of the lifting platform and reduce the lateral deflection while keeping the diameter of the trapezoidal screw rod consistent, reduce the diameter of the trapezoidal screw rod while keeping the strength coefficient consistent, and suspend the weight of the lifting platform on the main frame, so as to effectively improve the safety and stability of the lifting device. The trapezoidal screw rod is kept in constant low helical friction surface contact stress by setting the counterweight system, the running load of the transmission system is effectively reduced, the rotating speed of the transmission system is improved, and the safe and efficient transfer of the test piece is realized. The momentum generated by the shaking of the lifting platform during the movement of the lifting platform and the potential energy collected by the lifting platform during the descent of the lifting platform are effectively collected by setting the energy feeding module, and the energy utilization rate is improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the application, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0016] Figure 1 The structural diagram of the lifting device for the pre-assembly process of an aero-engine according to an embodiment of the application; Figure 2 The structural diagram of the lifting system according to an embodiment of the application; Figure 3 The structural diagram of the main frame according to an embodiment of the application; Figure 4 The structural diagram of the lifting platform according to an embodiment of the application; Figure 3 The enlarged view of A in FIG. 8; Figure 5 The structural diagram of the lifting platform according to an embodiment of the application; Figure 6 Structure diagram of a guide wheel assembly according to an embodiment of the present application; Figure 7 Structure diagram of a front and rear guide wheel device according to an embodiment of the present application; Figure 8 Structure diagram of a drive system according to an embodiment of the present application; Figure 9 Enlarged view of B of Figure 8 Figure 10 Enlarged view of C of Figure 8 Figure 11 Structure diagram of a counterweight system according to an embodiment of the present application; Figure 12 Structure diagram of a counterweight device according to an embodiment of the present application; Figure 13 Structure diagram of a lift barrier system according to an embodiment of the present application.

[0017] ​​In the figure: 1, lifting system; 2, one layer entrance platform; 3, two layer exit platform; 4, test piece; 5, foundation pit embedded part; 6, energy storage device; 10, main frame; 20, lifting platform; 40, counterweight system; 60, transmission system; 111, first vertical column; 112, second vertical column; 113, third vertical column; 114, fourth vertical column; 115, left and right limiting block of lifting platform; 116, front and rear limiting block of lifting platform; 121, first connecting cross beam; 122, second connecting cross beam; 123, third connecting cross beam; 124, fourth connecting cross beam; 131, first longitudinal beam; 132, second longitudinal beam; 141, first pulley mounting bracket of main frame; 142, second pulley mounting bracket of main frame; 143, third pulley mounting bracket of main frame; 144, fourth pulley mounting bracket of main frame; 201, bearing platform; 202, force transmission part of bearing platform; 211, first guide wheel assembly; 212, second guide wheel assembly; 213, third guide wheel assembly; 214, fourth guide wheel assembly; 240, first lifting guardrail system; 250, second lifting guardrail system; 261, first bearing structure; 262, second bearing structure; 270, first flap mechanism; 280, second flap mechanism; 241, fixed guardrail; 242, first sliding block group; 243, guardrail bearing frame; 244, transmission straight rack; 245, guardrail driving motor; 246, second sliding block group; 248, movable guardrail; 272, flap; 271, turning hinge; 220, front and rear guide wheel device; 230, left and right guide wheel device; 221, guide wheel; 222, guide wheel bracket; 223, damping device connecting piece; 224, guide wheel device fixing seat; 225, elastic module; 226, damping module; 227, damping energy feedback module; 228, damping device fixing piece; 401, first counterweight device; 402, second counterweight device; 403, third counterweight device; 404, fourth counterweight device; 411, first fixed pulley assembly of main frame; 412, second fixed pulley assembly of main frame; 413, third fixed pulley assembly of main frame; 414, fourth fixed pulley assembly of main frame; 421, first steel wire rope assembly; 422, second steel wire rope assembly; 423, third steel wire rope assembly; 431, counterweight mass; 432, counterweight fixed pulley assembly; 433, counterweight fixed pulley fixing block; 434, winding drum device fixing bracket; 435, winding drum module; 436, dragging force module; 437, winding drum driving motor; 438, counterweight device energy feedback module; 601, first lifting module; 602, second lifting module; 603, third lifting module; 604, fourth lifting module; 605, main driving motor; 611, first transmission shaft; 612, second transmission shaft; 613, third transmission shaft; 614, fourth transmission shaft; 615, fifth transmission shaft; 616, sixth transmission shaft; 621, first turbine worm reducer; 622, second turbine worm reducer; 623, third turbine worm reducer; 624, fourth turbine worm reducer;631, first commutator; 632, second commutator; 633, third commutator; 651, lifting module fixing seat; 652, thrust bearing assembly; 653, force sensor; 654, upper limit bearing; 655, trapezoidal screw; 656, force bearing table fixing block; 657, transmission nut assembly; 661, lower limit bearing; 662, upper coupling assembly; 663, lower coupling assembly; 664, turbine worm assembly; 665, turbine worm fixing block. DETAILED DESCRIPTION

[0018] The embodiments of the present application will be described in detail below with reference to the drawings.

[0019] The above and other aspects of the present application will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings in which:

[0020] It is to be understood that the foregoing description is that of certain specific embodiments of the application. Numerous modifications, substitutions, changes, and equivalents will now occur to those of ordinary skill in the art. It is, therefore, to be understood that appended claims are intended to cover all such modifications and changes as fall within the true spirit and scope of the application. In the claims, means-plus-function clauses are intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Thus although specific constructions have been discussed, this is merely to demonstrate the principles of the application and it will be apparent to those skilled in the art that various modifications can be made within the scope of the application and the scope of the appended claims.

[0021] It is also to be understood that the following description is only one of the various aspects of the present application. Accordingly, various modifications, changes, omissions, and substitutions can be made without departing from the spirit of the application. It is expressly intended that the claims be read restrictively as including all such changes and modifications.

[0022] Also in the following description, specific details are provided to thoroughly understand examples. It will be understood by one of ordinary skill in the art, however, that the aspects can be practiced without these specific details.

[0023] The embodiment of the present application provides a lifting device for an aero-engine pre-assembly process, which is described below with reference to Figures 1 to 13 in detail.

[0024] In one embodiment, with reference to Figure 1 and Figure 2 , a lifting device for an aero-engine pre-assembly process includes a lifting system 1, a first-level entrance platform 2, a second-level exit platform 3, a test piece 4, a foundation pit embedded part 5, and an energy storage device 6, the lifting system 1 and the energy storage device 6 are fixed on the foundation pit embedded part 5, the first-level entrance platform 2 is located below one side of the lifting system 1, and the second-level exit platform 3 is located above the other side of the lifting system 1; the lifting system 1 includes a main frame 10, a lifting platform 20, a counterweight system 40, and a transmission system 60, the main frame 10 is a frame structure, the upper part of the transmission system 60 is suspended on the main frame 10, the bottom of the transmission system 60 is fixed on the foundation pit embedded part 5, four corners of the lifting platform 20 are connected with the transmission system 60 and move up and down along the frame of the main frame 10, the test piece 4 is fixed on the lifting platform 20, one end of the counterweight system 40 is connected with the side of the lifting platform 20, the top of the counterweight system 40 is movably connected with the top of the main frame 10, the other end of the counterweight system 40 is fixed on the foundation pit embedded part 5, and the counterweight system 40 is used for balancing the load of the lifting platform 20 acting on the transmission system 60; the lifting platform 20 and the counterweight system 40 are respectively provided with a regenerative module, and the regenerative module is connected with the energy storage device 6.

[0025] In specific implementation, the directions are defined as follows: x positive direction - front; x negative direction - back; y positive direction - left; y negative direction - right; z positive direction - up; and z negative direction - down. The first floor entrance platform 2, the second floor exit platform 3 and the foundation pit embedded part 5 are the civil foundation of the lifting device and bear all the weight of the lifting device; the first floor entrance platform 2 is located below and behind the lifting system 1, the second floor exit platform 3 is located above and in front of the lifting system 1, the lifting system 1 is fixed on the foundation pit embedded part 5 through bolts, the test piece 4 is locked on the lifting platform 20 of the lifting system 1, and the upper parts of the first longitudinal beam 131 and the second longitudinal beam 132 of the main frame 10 are fixed with the second floor exit platform 3; the height difference between the first floor entrance platform 2 and the second floor exit platform 3 in the vertical direction is equal to the up-down running distance of the lifting platform 20 of the lifting system 1; during the installation and transfer process of the test piece 4, the lifting platform 20 bears the weight G2 of the test piece 4, the lifting platform 20 of the lifting system 1 is first adjusted to the same height as the first floor entrance platform 2, the test piece 4 enters the lifting platform 20 of the lifting system 1 from the first floor entrance platform 2, then the lifting platform 20 of the lifting system 1 is raised to the same height as the second floor exit platform 3, and the test piece 4 enters the second floor exit platform 3 from the lifting platform 20 of the lifting system 1; the disassembly and transfer process of the test piece 4 is the reverse direction of the installation and transfer process, which will not be described here.

[0026] In one embodiment, the frame of the main frame 10 includes four columns, which are respectively located at the four corners of the main frame 10 and are vertically fixed on the foundation pit embedded part 5; the columns located in the width direction of the main frame 10 are fixedly connected through the connecting beams, the columns located in the length direction of the main frame 10 are fixedly connected through the longitudinal beams, the longitudinal beams are fixed on the top of the columns, the lower surface of the longitudinal beam is provided with a main frame pulley mounting bracket, and the main frame pulley mounting bracket is movably connected with the top of the counterweight system 40.

[0027] In specific implementation, reference is made to Figure 3, the four upright columns are a first upright column 111, a second upright column 112, a third upright column 113, and a fourth upright column 114, respectively located at four corners of the main frame 10, vertically fixed on the foundation pit embedded part 5, and used for bearing the load of the lifting device; the connecting cross beams include a first connecting cross beam 121, a second connecting cross beam 122, a third connecting cross beam 123, and a fourth connecting cross beam 124, and the longitudinal beams include a first longitudinal beam 131 and a second longitudinal beam 132; the main frame pulley mounting frame includes a main frame first pulley mounting frame 141, a main frame second pulley mounting frame 142, a main frame third pulley mounting frame 143, and a main frame fourth pulley mounting frame 144. The first connecting cross beam 121 is fixed at the upper part of the first upright column 111 and the second upright column 112 at both ends, respectively, when the lifting platform 20 is lifted to the highest position, the first connecting cross beam 121 is located between the second-floor exit platform 3 and the lifting platform 20, and is flush with both of them, respectively; the second connecting cross beam 122 is fixed at the upper part of the third upright column 113 and the fourth upright column 114 at both ends, respectively, and is the same height as the first connecting cross beam 121; the fourth connecting cross beam 124 is fixed at the lower part of the third upright column 113 and the fourth upright column 114 at both ends, respectively, when the lifting platform 20 is lowered to the lowest position, the fourth connecting cross beam 124 is located between the first-floor entrance platform 2 and the lifting platform 20, and is flush with both of them, respectively; the third connecting cross beam 123 is fixed at the lower part of the first upright column 111 and the second upright column 112 at both ends, respectively, and is the same height as the fourth connecting cross beam 124. The second longitudinal beam 132 is fixed at the top of the second upright column 112 and the third upright column 113 at both ends, respectively, and the front and rear ends of the lower surface are respectively provided with the main frame first pulley mounting frame 141 and the main frame second pulley mounting frame 142, which are respectively used for fixing the top main frame first fixed pulley assembly 411 and the main frame third fixed pulley assembly 413 of the counterweight system 40; the first longitudinal beam 131 is fixed at the top of the first upright column 111 and the fourth upright column 114 at both ends, respectively, and the front and rear ends of the lower surface are respectively provided with the main frame third pulley mounting frame 143 and the main frame fourth pulley mounting frame 144, which are respectively used for fixing the main frame fourth fixed pulley assembly 414 and the main frame second fixed pulley assembly 412 of the counterweight system 40.

[0028] In one embodiment, the main frame 10 is used to transmit the force between the lifting platform 20, the counterweight system 40, the transmission system 60, the counterweight system 40 is used to balance the load of the lifting platform 20 acting on the transmission system 60, and the transmission system 60 and the lifting platform 20 realize rapid movement; the main frame 10 is a frame structure, which is a load-bearing frame of the lifting system 1, and is fixed on the foundation pit embedded part 5 through the lower ends of the first column 111, the second column 112, the third column 113 and the fourth column 114; the upper part of the transmission system 60 is fixed on the upper ends of the first column 111, the second column 112, the third column 113 and the fourth column 114 of the main frame 10 through the lifting module fixing seat 651, and the main drive motor 605, the worm gear reducer and the reverser at the lower part of the transmission system 60 are fixed on the foundation pit embedded part 5; the lifting platform 20 is fixed on the first lifting module 601, the second lifting module 602, the third lifting module 603 and the fourth lifting module 604 of the transmission system 60 through the four force-bearing platform force transmission members 202 at the four corners thereof; the upper part of the counterweight system 40 is connected with the main frame first pulley mounting bracket 141, the main frame second pulley mounting bracket 142, the main frame third pulley mounting bracket 143 and the main frame fourth pulley mounting bracket 144 through the main frame first fixed pulley assembly 411, the main frame second fixed pulley assembly 412, the main frame third fixed pulley assembly 413 and the main frame fourth fixed pulley assembly 414, respectively; one end of the first steel wire rope assembly 421 and the second steel wire rope assembly 422 of the counterweight system 40 is connected with the lifting points of the first force-bearing structure 261 and the second force-bearing structure 262 of the lifting platform 20, respectively; the lower part of the counterweight system 40 is fixed on the foundation pit embedded part 5 through the counterweight fixed pulley block 433 and the drum device fixing bracket 434, so as to change the force of the counterweight system 40 acting on the lifting platform 20, thereby changing the load size of the transmission system 60 and realizing rapid lifting of the lifting platform 20.

[0029] In one embodiment, referring to Figures 4 to 6, the lifting platform 20 comprises a bearing platform 201, and the four corners of the bearing platform 201 are respectively provided with a bearing platform force transmission member 202 and a guide wheel assembly; the bearing platform force transmission member 202 is a boss structure formed by the bearing platform 201 extending outward, and the bearing platform force transmission member 202 is connected with the transmission system 60; each guide wheel assembly comprises left-right guide wheel devices 230 and front-rear guide wheel devices 220; the left-right guide wheel devices 230 are located on the lower surface of the bearing platform 201, the front-rear guide wheel devices 220 are located on the upper surface of the bearing platform 201, the installation directions of the left-right guide wheel devices 230 and the front-rear guide wheel devices 220 are perpendicular, one side surface of each stand column is provided with a lifting platform left-right limiting block 115, the other side surface of each stand column is provided with a lifting platform front-rear limiting block 116, the left-right guide wheel devices 230 are in sliding connection with the lifting platform left-right limiting blocks 115, and the front-rear guide wheel devices 220 are in sliding connection with the lifting platform front-rear limiting blocks 116; and the length direction side of the bearing platform 201 is provided with a bearing structure, and the bearing structure is connected with one end of the counterweight system 40.

[0030] In specific implementation, the weight of the lifting platform 20 is G1, the bearing platform 201 is a rectangular structure, and is used for placing the test piece 4; the bearing platform force transmission members 202 are respectively located at the four corners of the bearing platform 201, are symmetrically arranged, and are respectively fixedly connected with the first lifting module 601, the second lifting module 602, the third lifting module 603 and the fourth lifting module 604 of the transmission system 60; the guide wheel assemblies comprise a first guide wheel assembly 211, a second guide wheel assembly 212, a third guide wheel assembly 213 and a fourth guide wheel assembly 214, and are respectively located at the four corners of the bearing platform 201 and are symmetrically arranged. The inner sides of the first stand column 111, the second stand column 112, the third stand column 113 and the fourth stand column 114 are respectively provided with the lifting platform left-right limiting blocks 115 and the lifting platform front-rear limiting blocks 116, and the first guide wheel assembly 211, the second guide wheel assembly 212, the third guide wheel assembly 213 and the fourth guide wheel assembly 214 are in contact with the lifting platform left-right limiting blocks 115 and the lifting platform front-rear limiting blocks 116, so that the shaking of the lifting platform 20 during the lifting and lowering process is reduced.

[0031] Specifically, the four guide wheel assemblies each include a left-right guide wheel device 230 and a front-rear guide wheel device 220. The front-rear guide wheel device 220 is installed above the load-bearing table top 201, close to the load-bearing table top force transmission member 202, and cooperates with the front-rear limiting block 116 of the lifting table top to limit the front-rear shaking of the lifting table top 20. The left-right guide wheel device 230 is installed below the load-bearing table top 201, close to the load-bearing table top force transmission member 202, and cooperates with the left-right limiting block 115 of the lifting table top to limit the left-right shaking of the lifting table top 20. The front-rear guide wheel devices 220 of the first guide wheel assembly 211 and the second guide wheel assembly 212 are installed in the same direction, and the guide wheels 221 are installed in the front direction to limit the forward shaking of the lifting table top 20. The left-right guide wheel devices 230 of the first guide wheel assembly 211 and the fourth guide wheel assembly 214 are installed in the same direction, and the guide wheels 221 are installed in the right direction to limit the right shaking of the lifting table top 20. The left-right guide wheel devices 230 of the second guide wheel assembly 212 and the third guide wheel assembly 213 are installed in the same direction, and the guide wheels 221 are installed in the left direction to limit the left shaking of the lifting table top 20. The front-rear guide wheel devices 220 of the third guide wheel assembly 213 and the fourth guide wheel assembly 214 are installed in the same direction, and the guide wheels 221 are installed in the rear direction to limit the rear shaking of the lifting table top 20.

[0032] In one embodiment, referring to Figure 7 , the left-right guide wheel device 230 and the front-rear guide wheel device 220 have the same structure and each include a guide wheel 221, a guide wheel frame 222, a damping device connecting member 223, a guide wheel device fixing seat 224, an elastic module 225, a damping module 226, a damping energy feedback module 227, and a damping device fixing member 228. The elastic module 225, the damping module 226, the damping energy feedback module 227, and the damping device fixing member 228 are sequentially connected and fixed to the guide wheel device fixing seat 224. The bottom of the guide wheel device fixing seat 224 is fixed to the load-bearing table top 201. The elastic module 225 is located at the opening end of the guide wheel device fixing seat 224. The elastic module 225 is connected to the guide wheel frame 222 through the damping device connecting member 223. The guide wheel 221 is fixed to the guide wheel frame 222. The guide wheel 221 of the left-right guide wheel device 230 is slidingly connected to the left-right limiting block 115 of the lifting table top. The guide wheel 221 of the front-rear guide wheel device 220 is slidingly connected to the front-rear limiting block 116 of the lifting table top. The damping energy feedback module 227 is connected to the energy storage device 6. The damping energy feedback module 227 is used to collect the momentum generated by the shaking of the lifting table top 20 during movement through the elastic module 225 and the damping module 226 and convert it into electrical energy.

[0033] Specifically, the guide wheel 221 is in elastic contact with the front and rear limiting blocks 116 or the left and right limiting blocks 115 of the lifting platform, so as to limit the lifting platform 20. The guide wheel device fixing seat 224 is fixed at the bottom of the bearing platform 201, and the damping device fixing part 228 is fixed at the tail end of the guide wheel device fixing seat 224. The elastic module 225 is compressed to provide a pre-tightening force, so that the guide wheel 221 and the limiting blocks of the lifting platform keep rolling contact during the up and down movement of the lifting platform 20. The damping module 226 is used to reduce the shaking amplitude of the lifting platform 20. The damping and energy feedback module 227 collects the momentum generated by the shaking of the lifting platform 20 during the movement and converts it into electrical energy, which is stored in the energy storage device 6.

[0034] In one embodiment, with reference to Figure 8 , the transmission system 60 includes a power assembly and four lifting modules. Each lifting module includes a lifting module fixing seat 651, a thrust bearing assembly 652, a force sensor 653, an upper limiting bearing 654, a trapezoidal screw 655, a bearing platform fixing block 656, a transmission nut assembly 657, a lower limiting bearing 661, and a worm gear reducer. The worm gear reducer is connected with the power assembly. The lifting module fixing seat 651 is fixedly connected to the stand column. The center mounting surface of the lifting module fixing seat 651, the thrust bearing assembly 652, the force sensor 653, and the upper limiting bearing 654 all have central through holes. The force sensor 653 is fixed to the upper side of the center mounting surface of the lifting module fixing seat 651. The upper part of the force sensor 653 is fixed to the thrust bearing assembly 652. The upper limiting bearing 654 is fixed to the lower side of the center mounting surface of the lifting module fixing seat 651. The upper end of the trapezoidal screw 655 passes through the upper limiting bearing 654, the center mounting surface of the lifting module fixing seat 651, and the force sensor 653 in sequence. The upper end of the trapezoidal screw 655 is suspended and fixed to the rotating part of the thrust bearing assembly 652. The trapezoidal screw 655 is limited upward by the upper limiting bearing 654. The lower end of the trapezoidal screw 655 is limited in the horizontal plane by the lower limiting bearing 661. The lower end of the trapezoidal screw 655, which is located below the lower limiting bearing 661, is connected with the worm gear reducer. The trapezoidal screw 655 is threadedly connected with the transmission nut assembly 657. The upper side of the transmission nut assembly 657 is fixed with the bearing platform fixing block 656. The bearing platform fixing block 656 is fixed with the corners of the lifting platform 20. The rotation of the trapezoidal screw 655 drives the up and down movement of the transmission nut assembly 657, thereby driving the up and down movement of the lifting platform 20.

[0035] Further, the turbine worm reducer comprises a coupling upper assembly 662, a coupling lower assembly 663, a turbine worm assembly 664 and a turbine worm fixing block 665 connected in sequence, the coupling upper assembly 662 is connected with the lower end of the trapezoidal screw 655, the coupling upper assembly 662 and the coupling lower assembly 663 are mutually embedded in the vertical direction and are not limited in the vertical direction, the turbine worm assembly 664 is connected with the power assembly, and the turbine worm fixing block 665 is fixed on the foundation pit embedded part 5.

[0036] Specifically, the four lifting modules are a first lifting module 601, a second lifting module 602, a third lifting module 603 and a fourth lifting module 604, the first lifting module 601 is located at the front left side of the lifting table top 20, the second lifting module 602 is located at the front right side of the lifting table top 20, the third lifting module 603 is located at the rear left side of the lifting table top 20, and the fourth lifting module 604 is located at the rear right side of the lifting table top 20; the first lifting module 601, the second lifting module 602, the third lifting module 603 and the fourth lifting module 604 are fixed on the upper parts of the four columns of the main frame 10 through the upper lifting module fixing seat 651 and are fixed on the upper part of the foundation pit embedded part 5 through the turbine worm fixing block 665.

[0037] With reference to Figure 9 , the first lifting module 601, the second lifting module 602, the third lifting module 603 and the fourth lifting module 604 are structurally identical. The center mounting surface of the lifting module fixing seat 651, the thrust bearing assembly 652, the force sensor 653 and the upper limiting bearing 654 are all center through holes; the lifting module fixing seat 651 is fixed on the upper parts of the four columns of the main frame 10, the force sensor 653 is fixed on the upper side of the center mounting surface of the lifting module fixing seat 651, the upper part of the force sensor 653 is fixed with the thrust bearing assembly 652, and the upper limiting bearing 654 is fixed on the lower side of the center mounting surface of the lifting module fixing seat 651; the trapezoidal screw 655 passes through the upper limiting bearing 654, the center mounting surface of the lifting module fixing seat 651 and the force sensor 653, the upper end of the trapezoidal screw 655 is fixed on the rotating part of the thrust bearing assembly 652, and the trapezoidal screw 655 realizes upward limiting through the upper limiting bearing 654.

[0038] With reference to Figure 10The lower end of the trapezoidal screw 655 is limited in the horizontal plane by the lower limit bearing 661 and is fixed to the upper coupling component 662, which is embedded in the lower coupling component 663 in the vertical direction without limitation, so that the trapezoidal screw 655 can move freely in the vertical direction. The trapezoidal screw 655 is threadedly connected to the transmission nut assembly 657, the upper part of which is fixed to the load-bearing platform fixed block 656, which is fixed to the load-bearing platform force transmission element 202 of the lifting platform 20. The rotation of the trapezoidal screw 655 drives the upward and downward movement of the transmission nut assembly 657, thereby driving the upward and downward movement of the lifting platform 20.

[0039] Preferably, the trapezoidal screw 655 has a 4° helix angle to achieve self-locking, preventing the downward movement of the lifting platform 20 and improving the safety of the device.

[0040] The upward and downward movement of the trapezoidal screw 655 is fixed at the upper end and movable at the lower end in the vertical direction, which ensures that the axial force of the trapezoidal screw 655 is tension, measured in real time by the force sensor 653 to avoid the stability failure of the trapezoidal screw 655. This arrangement can improve the lateral stiffness of the lifting platform 20 and reduce the lateral deflection while maintaining the same diameter of the trapezoidal screw 655. This arrangement can also reduce the diameter of the trapezoidal screw 655 while maintaining the same strength coefficient. The weight of the lifting platform 20 is suspended on the main frame 10 by the trapezoidal screw 655, which can effectively improve the safety and stability of the lifting device.

[0041] In one embodiment, referring to Figure 8The power assembly comprises a main driving motor 605, a commutator, and a transmission shaft. The commutator and the main driving motor 605 are fixed on the foundation pit embedded part 5. The commutator comprises a first commutator 631, a second commutator 632, and a third commutator 633. The transmission shaft comprises a first transmission shaft 611, a second transmission shaft 612, a third transmission shaft 613, a fourth transmission shaft 614, a fifth transmission shaft 615, and a sixth transmission shaft 616. The output shaft of the main driving motor 605 is connected with the first commutator 631. The output shafts at two ends of the first commutator 631 are respectively connected with one end of the fifth transmission shaft 615 and one end of the sixth transmission shaft 616. The other end of the fifth transmission shaft 615 is connected with the input shaft of the second commutator 632. The other end of the sixth transmission shaft 616 is connected with the input shaft of the third commutator 633. The output shafts at left and right ends of the second commutator 632 are respectively connected with one end of the first transmission shaft 611 and one end of the second transmission shaft 612. The output shafts at left and right ends of the third commutator 633 are respectively connected with one end of the third transmission shaft 613 and one end of the fourth transmission shaft 614. The other end of the first transmission shaft 611, the other end of the second transmission shaft 612, the other end of the third transmission shaft 613, and the other end of the fourth transmission shaft 614 are respectively connected with the input shafts of the corresponding turbine worm assemblies 664.

[0042] Specifically, the turbine worm reducer includes a first turbine worm reducer 621, a second turbine worm reducer 622, a third turbine worm reducer 623, and a fourth turbine worm reducer 624. The first commutator 631, the second commutator 632, the third commutator 633, and the main drive motor 605 are fixed on the upper part of the foundation pit embedded part 5. The first commutator 631 is connected to the output shaft of the main drive motor 605. The first commutator 631 is located in the central region of the foundation pit embedded part 5. The output shafts at both ends of the first commutator 631 are respectively connected to one end of the fifth transmission shaft 615 and one end of the sixth transmission shaft 616. The second commutator 632 and the third commutator 633 are respectively located at both ends of the front and rear center lines of the foundation pit embedded part 5. The other end of the fifth transmission shaft 615 is connected to the input shaft of the second commutator 632. The other end of the sixth transmission shaft 616 is connected to the input shaft of the third commutator 633. The output shafts at both ends of the second commutator 632 are respectively connected to one end of the first transmission shaft 611 and one end of the second transmission shaft 612. The output shafts at both ends of the third commutator 633 are respectively connected to one end of the third transmission shaft 613 and one end of the fourth transmission shaft 614. The other ends of the first transmission shaft 611 and the second transmission shaft 612 are respectively connected to the input shafts of the first turbine worm reducer 621 and the second turbine worm reducer 622. The other ends of the third transmission shaft 613 and the fourth transmission shaft 614 are connected to the input shafts of the third turbine worm reducer 623 and the fourth turbine worm reducer 624. Thus, the driving rotation speed of the main drive motor 605 is evenly distributed, and the ascending and descending speeds of the first lifting module 601, the second lifting module 602, the third lifting module 603, and the fourth lifting module 604 are consistent. The energy storage device 6 is fixed on the main drive motor 605 and is used to store the electric energy generated by the vibration damping and energy feeding module 227 and the counterweight device energy feeding module 438. The stored electric energy is mainly used for daily low-voltage power supply of the control system, the lubrication system, and the alarm indication system of the lifting device.

[0043] Figure 8 F 21 represents the total weight of the lifting platform 20 and the test piece 4 applied to the first lifting module 601, 22 represents the total weight of the lifting platform 20 and the test piece 4 applied to the second lifting module 602, 23 represents the total weight of the lifting platform 20 and the test piece 4 applied to the third lifting module 603, 24 represents the total weight of the lifting platform 20 and the test piece 4 applied to the fourth lifting module 604, which is measured in real time by four groups of force sensors 653.

[0044] In one embodiment, with reference to Figure 11 and Figure 12The counterweight system comprises a counterweight device, a main frame fixed pulley assembly and a steel wire rope assembly. The counterweight device comprises a counterweight mass 431, a counterweight fixed pulley assembly 432, a counterweight fixed pulley fixing block 433, a winding drum device fixing frame 434, a winding drum module 435, a drag force module 436, a winding drum drive motor 437 and a counterweight device regenerative module 438. The steel wire rope assembly comprises a first steel wire rope assembly 421, a second steel wire rope assembly 422 and a third steel wire rope assembly 423. The main frame fixed pulley assembly is fixed on the main frame pulley mounting bracket. One end of the first steel wire rope assembly 421 and the second steel wire rope assembly 422 is connected with the lifting point of the load-bearing structure. The other end of the first steel wire rope assembly 421 and the second steel wire rope assembly 422 passes through the main frame fixed pulley assembly and is connected with one end of the counterweight mass 431. The other end of the counterweight mass 431 is connected with one end of the third steel wire rope assembly 423. The other end of the third steel wire rope assembly 423 is wound on the winding drum module 435 after passing through the counterweight fixed pulley assembly 432. The winding drum module 435 is connected with one end of the drag force module 436 through a transmission shaft. The counterweight fixed pulley assembly 432 is fixed on the counterweight fixed pulley fixing block 433. The winding drum module 435 and the drag force module 436 are fixed on the winding drum device fixing frame 434. The counterweight fixed pulley fixing block 433 and the winding drum device fixing frame 434 are fixed on the foundation pit embedded part 5. The other end of the drag force module 436 is connected with the winding drum drive motor 437 and the counterweight device regenerative module 438 in sequence. The counterweight device regenerative module 438 is connected with the energy storage device 6. The counterweight device regenerative module 438 is used to collect the potential energy in the descending process of the lifting platform 20 and convert it into electrical energy.

[0045] Specifically, the counterweight device includes a first counterweight device 401, a second counterweight device 402, a third counterweight device 403, and a fourth counterweight device 404, and the main frame fixed pulley assembly includes a main frame first fixed pulley assembly 411, a main frame second fixed pulley assembly 412, a main frame third fixed pulley assembly 413, and a main frame fourth fixed pulley assembly 414. The main frame first fixed pulley assembly 411 and the first counterweight device 401 are located at the front left side of the lifting platform 20, the main frame first fixed pulley assembly 411 is fixed on the main frame first pulley mounting bracket 141, and the two sets of steel wire rope assemblies at the upper end of the first counterweight device 401 are fixed on the left lifting points of the first load-bearing structure 261 of the lifting platform 20, so as to realize the steering of the gravity applied by the lifting platform 20 and the test piece 4 to the first counterweight device 401 and bear the generated balance force 2xF1; the main frame second fixed pulley assembly 412 and the second counterweight device 402 are located at the front right side of the lifting platform 20, the main frame second fixed pulley assembly 412 is fixed on the main frame fourth pulley mounting bracket 144, and the two sets of steel wire rope assemblies at the upper end of the second counterweight device 402 are fixed on the right lifting points of the first load-bearing structure 261 of the lifting platform 20, so as to realize the steering of the gravity applied by the lifting platform 20 and the test piece 4 to the second counterweight device 402 and bear the generated balance force 2xF2; the main frame third fixed pulley assembly 413 and the third counterweight device 403 are located at the rear left side of the lifting platform 20, the main frame third fixed pulley assembly 413 is fixed on the main frame second pulley mounting bracket 142, and the two sets of steel wire rope assemblies at the upper end of the third counterweight device 403 are fixed on the left lifting points of the second load-bearing structure 262 of the lifting platform 20, so as to realize the steering of the gravity applied by the lifting platform 20 and the test piece 4 to the third counterweight device 403 and bear the generated balance force 2xF3; the main frame fourth fixed pulley assembly 414 and the fourth counterweight device 404 are located at the rear right side of the lifting platform 20 and are fixed on the main frame third pulley mounting bracket 143, and the two sets of steel wire rope assemblies at the upper end of the fourth counterweight device 404 are fixed on the right lifting points of the second load-bearing structure 262 of the lifting platform 20, so as to realize the steering of the gravity applied by the lifting platform 20 and the test piece 4 to the fourth counterweight device 404 and bear the generated balance force 2xF4.

[0046] Wherein, F1 represents the force applied by the lifting platform 20 and the test piece 4 to the first counterweight device 401, F2 represents the force applied by the lifting platform 20 and the test piece 4 to the second counterweight device 402, F3 represents the force applied by the lifting platform 20 and the test piece 4 to the third counterweight device 403, and F4 represents the force applied by the lifting platform 20 and the test piece 4 to the fourth counterweight device 404; G 11 represents the fixed weight of the counterweight mass of the first counterweight device 401, G 12 represents the fixed weight of the counterweight mass of the second counterweight device 402, G 13G represents the fixed weight of the counterweight mass of the third counterweight device 403 14 F represents the fixed weight of the counterweight mass of the fourth counterweight device 404 11 F represents the drag force generated by the drag force module of the first counterweight device 401 12 F represents the drag force generated by the drag force module of the second counterweight device 402 13 F represents the drag force generated by the drag force module of the third counterweight device 403 14 F represents the drag force generated by the drag force module of the fourth counterweight device 404 11 , G 12 , G 13 , G 14 The weights are consistent: F1=G 11 +F 11 , F2=G 12 +F 12 , F3=G 13 +F 13 , F4=G 14 +F 14 .

[0047] The specific structure of the counterweight device is described below. One end of the first steel wire rope assembly 421 and the second steel wire rope assembly 422 is fixed on the load-bearing structure of the lifting platform 20, and the other end is fixed on the counterweight mass 431. The upper end of the third steel wire rope assembly 423 is fixed on the counterweight mass 431, and the other end is wound on the winding drum module 435 through the counterweight fixed pulley assembly 432. The counterweight fixed pulley assembly 432 is fixed on the counterweight fixed pulley fixed block 433, and the bottom of the counterweight fixed pulley fixed block 433 is fixed on the upper part of the foundation pit embedded part 5. The bottom of the winding drum device fixed frame 434 is fixed on the upper part of the foundation pit embedded part 5, and the winding drum module 435 and the drag force module 436 are fixed thereon, and the winding drum module 435 and the drag force module 436 are connected through a transmission shaft. The winding drum drive motor 437 and the counterweight device energy feedback module 438 are connected in sequence on the left side of the drag force module 436. By controlling the speed and torque of the winding drum drive motor 437, the drag force module 436 and the winding drum module 435 are driven to realize the real-time change of the drag force generated by the drag force module of the counterweight device. The counterweight device energy feedback module 438 is mainly used to collect the potential energy in the descending process of the lifting platform 20 and convert it into electrical energy, which is stored in the energy storage device 6.

[0048] In one embodiment, with reference to Figure 5, the width direction of the force bearing platform 201 is provided with a lifting guardrail system and a flap mechanism for protection during the lifting and lowering of the lifting platform 20, the flap mechanism is fixed to one opposite side of the force bearing platform 201 through a flip hinge 271, the lifting guardrail system is located on the lower surface of the force bearing platform 201 and corresponds to the position of the flap mechanism, and linkage is performed among the flap mechanism, the lifting guardrail system and the lifting platform 20.

[0049] In a specific implementation, the flap mechanism includes a first flap mechanism 270 and a second flap mechanism 280, the first flap mechanism 270 and the second flap mechanism 280 each include a flap 272 and a flip hinge 271, the flip hinge 271 is provided with two groups of pre-tightening springs on the left and right sides, one end is hinged to the force bearing platform 201, and the other end is fixed to the flap 272.

[0050] The lifting guardrail system includes a first lifting guardrail system 240 and a second lifting guardrail system 250, the first lifting guardrail system 240 and the second lifting guardrail system 250 are respectively located at the front end and the rear end of the force bearing platform 201 and are fixed to the force bearing platform 201 through a guardrail force bearing frame 243, for protection of the test piece 4 and personnel during the lifting and lowering of the lifting platform 20; the first flap mechanism 270 is fixed to the front end of the force bearing platform 201 through the flip hinge 271, and the first lifting guardrail system 240 is below the first flap mechanism 270; the second flap mechanism 280 is fixed to the rear end of the force bearing platform 201 through the flip hinge 271, and the second lifting guardrail system 250 is below the second flap mechanism 280; linkage is performed among the flap mechanism, the lifting guardrail system and the lifting platform 20, and the lifting guardrail system and the flap mechanism will move in sequence during the lifting and lowering of the lifting platform 20. Specifically, when the lifting platform 20 is ready to be lifted, the lifting guardrail system moves upward to push open the flap mechanism, the lifting guardrail system reaches a set dynamic height, and the lifting platform 20 starts to move; similarly, when the lifting platform 20 is ready to be lowered, the lifting guardrail system moves downward, and the flap mechanism is lowered under the action of the pre-tightening spring located near the flip hinge 271; the force bearing structure of the lifting platform 20 includes a first force bearing structure 261 and a second force bearing structure 262, the first force bearing structure 261 is divided into left and right lifting points and is respectively located at the left and right sides of the front end of the force bearing platform 201, and the second force bearing structure 262 is also divided into left and right lifting points and is respectively located at the left and right sides of the rear end of the force bearing platform 201.

[0051] In one embodiment, with reference to Figure 13The lifting guardrail system comprises a fixed guardrail 241, a first sliding block group 242, a guardrail force bearing frame 243, a transmission straight rack 244, a guardrail driving motor 245, a second sliding block group 246 and a movable guardrail 248. The movable guardrail 248 is fixed above the fixed guardrail 241. The fixed guardrail 241 is connected with the left and right side pillars of the guardrail force bearing frame 243 through the first sliding block group 242 and the second sliding block group 246 respectively. The transmission straight rack 244 is vertically fixed in the middle pillar of the guardrail force bearing frame 243. The guardrail driving motor 245 is fixed in the middle pillar of the fixed guardrail 241. The guardrail driving motor 245 is engaged with the transmission straight rack 244 through a gear. The upward and downward movement of the lifting guardrail system is realized by controlling the rotating direction of the guardrail driving motor 245.

[0052] In one embodiment, the control logic of the counterweight system 40 of the lifting device specifically comprises the following contents: Since the rotating speed of the trapezoidal screw 655 is affected by the helical friction surface contact stress, in order to improve the lifting speed of the lifting platform 20, it is necessary to increase the rotating speed of the trapezoidal screw 655 and reduce the helical friction surface contact stress, that is, reduce F 21 , F 22 , F 23 , F 24 ; by changing the drag force of the counterweight system 40 in real time, the trapezoidal screw 655 is kept at a constant low helical friction surface contact stress, which can effectively reduce the operating load of the transmission system 60 and improve the movement speed of the transmission system 60; For a specific test piece 4, the size of (G1+G2) and the position of the center of mass are constant, the geometric structure of the lifting device is fixed, the resultant force of the four corner force platform force elements 202 of the lifting platform 20 and the counterweight device is constant, that is, (F 21 + G 11 +F 11 ), (F 22 +G 12 +F 12 ), (F 23 + G 13 +F 13 ) and (F 24 + G 14 +F 14 ) are also constant, and G 11 , G 12 , G 13 and G 14 are the same; therefore, according to the size of F 21 , F 22 , F 23 and F 24 measured by the four force sensors 653 in real time, the drag forces F 11 , F12 , F 13 , F 14 , F 21 , F 22 , F 23 , F 24 , F Wherein, G1+G2=(F 21 +F1)+(F 22 +F2)+(F 23 +F3)+(F 24 +F4), That is, G1+G2=(F 21 + G 11 +F 11 )+(F 22 + G 12 +F 12 )+(F 23 + G 13 +F 13 )+(F 24 + G 14 +F 14 ).

[0053] The embodiment provided by the application adopts the trapezoidal screw 655 in the layout of being fixed at the upper end and movable at the lower end in the vertical direction, can ensure that the axial force of the trapezoidal screw 655 is tension, avoids the problem of stability failure of the compression rod of the trapezoidal screw 655, can improve the lateral stiffness of the lifting platform 20 and reduce lateral deflection while keeping the diameter of the trapezoidal screw 655 consistent, can also reduce the diameter of the trapezoidal screw 655 while keeping the strength coefficient consistent, and the weight of the lifting platform 20 is hung on the main frame 10 through the trapezoidal screw 655, which can effectively improve the safety and stability of the lifting device.

[0054] By changing the drag force of the counterweight system 40 in real time, the trapezoidal screw 655 can be kept in a constant low helical friction surface contact stress, the running load of the transmission system 60 can be effectively reduced, the rotation speed of the transmission system 60 can be improved, and the safe and efficient transfer of the test piece 4 is realized.

[0055] When the lifting platform 20 is ready to rise, the lifting guardrail system moves upward, the flap mechanism is pushed open, the lifting guardrail system reaches the set height, and the lifting platform 20 starts to move; similarly, when the lifting platform 20 is ready to descend, the lifting guardrail system moves downward, and the flap mechanism is lowered under the action of the pre-tightening spring. The linkage between the flap mechanism, the lifting guardrail system and the lifting platform 20 can protect the test piece 4 and the personnel during the lifting and lowering of the lifting platform 20.

[0056] Through setting four groups of guide wheel assemblies, through the pre-tightening force of the elastic module 225, it is ensured that the guide wheels 221 and the lifting platform limiting blocks keep rolling contact during the up and down movement of the lifting platform 20, and the damping module 226 and the damping energy feedback module 227 can effectively reduce the shaking amplitude of the lifting platform and collect the momentum generated by the shaking during the movement of the lifting platform.

[0057] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A lifting device for the pre-assembly process of an aircraft engine, characterized in that: The device comprises a lifting system (1), a first-floor entrance platform (2), a second-floor exit platform (3), a test piece (4), a foundation pit embedded part (5), and an energy storage device (6). The lifting system (1) and the energy storage device (6) are fixed on the foundation pit embedded part (5). The first-floor entrance platform (2) is located below one side of the lifting system (1), and the second-floor exit platform (3) is located above the other side of the lifting system (1). The lifting system (1) comprises a main frame (10), a lifting platform (20), a counterweight system (40), and a transmission system (60). The main frame (10) is a frame structure. The upper part of the transmission system (60) is suspended on the main frame (10). The bottom of the transmission system (60) is suspended on the main frame (10). The first part is fixed on the foundation pit embedded part (5), the four corners of the lifting platform (20) are connected to the transmission system (60) and move up and down along the frame of the main frame (10), the test piece (4) is fixed on the lifting platform (20), one end of the counterweight system (40) is connected to the side of the lifting platform (20), the top of the counterweight system (40) is movably connected to the top of the main frame (10), and the other end of the counterweight system (40) is fixed on the foundation pit embedded part (5), and the counterweight system (40) is used to balance the load of the lifting platform (20) acting on the transmission system (60); the lifting platform (20) and the counterweight system (40) are respectively provided with energy feeding modules, and the energy feeding modules are connected to the energy storage device (6).

2. The lifting device for aircraft engine preassembly process according to claim 1, characterized in that: The frame of the main frame (10) includes four columns, which are respectively located at the four corners of the main frame (10). The four columns are vertically fixed on the foundation pit embedded parts (5). The columns located in the width direction of the main frame (10) are fixedly connected by connecting crossbeams. The columns located in the length direction of the main frame (10) are fixedly connected by longitudinal beams. The longitudinal beams are fixed to the tops of the columns. The lower surface of the longitudinal beams is provided with a main frame pulley mounting frame, and the main frame pulley mounting frame is movably connected to the top of the counterweight system (40).

3. The lifting device for aircraft engine preassembly process according to claim 2, characterized in that: The lifting platform (20) includes a load-bearing platform (201), and the four corners of the load-bearing platform (201) are respectively provided with a load-bearing platform transmission member (202) and a guide wheel assembly. The load-bearing platform transmission member (202) is a boss structure formed by extending outward from the load-bearing platform (201), and the load-bearing platform transmission member (202) is connected to the transmission system (60); each guide wheel assembly includes a left and right guide wheel device (230) and a front and rear guide wheel device (220), the left and right guide wheel devices (230) are located on the lower surface of the load-bearing platform (201), and the front and rear guide wheel devices (220) are located on the lower surface of the load-bearing platform (201). 1), the installation directions of the left and right guide wheel devices (230) and the front and rear guide wheel devices (220) are perpendicular, one side of each column is provided with a lifting platform left and right limit blocks (115), the other side of each column is provided with a lifting platform front and rear limit blocks (116), the left and right guide wheel devices (230) are slidably connected to the lifting platform left and right limit blocks (115), and the front and rear guide wheel devices (220) are slidably connected to the lifting platform front and rear limit blocks (116); a load-bearing structure is provided on the side of the load-bearing platform (201) in the longitudinal direction, and the load-bearing structure is connected to one end of the counterweight system (40).

4. The lifting device for aircraft engine preassembly process according to claim 3, characterized in that: The left and right guide wheel devices (230) and the front and rear guide wheel devices (220) have the same structure, and both include a guide wheel (221), a guide wheel frame (222), a vibration reduction device connector (223), a guide wheel device fixing seat (224), an elastic module (225), a damping module (226), a vibration reduction energy feedback module (227) and a vibration reduction device fixing member (228). The elastic module (225), the damping module (226), the vibration reduction energy feedback module (227) and the vibration reduction device fixing member (228) are connected in sequence and fixed to the guide wheel device fixing seat (224). The bottom of the guide wheel device fixing seat (224) is fixed to the load-bearing table (201). The elastic module (225) is located on the guide wheel device fixing seat. At the open end of the fixed seat (224), the elastic module (225) is connected to the guide wheel frame (222) through the vibration reduction device connector (223), the guide wheel (221) is fixed to the guide wheel frame (222), the guide wheels (221) of the left and right guide wheel devices (230) are slidably connected to the left and right limit blocks (115) of the lifting platform, and the guide wheels (221) of the front and rear guide wheel devices (220) are slidably connected to the front and rear limit blocks (116) of the lifting platform; the vibration reduction energy feedback module (227) is connected to the energy storage device (6), and the vibration reduction energy feedback module (227) is used to collect the momentum generated by the shaking of the lifting platform (20) during the movement through the elastic module (225) and the damping module (226) and convert it into electrical energy.

5. The lifting device for aircraft engine preassembly process according to claim 2, characterized in that: The transmission system (60) includes a power assembly and four lifting modules, each of which includes a lifting module fixing seat (651), a thrust bearing assembly (652), a force sensor (653), an upper limit bearing (654), a trapezoidal screw (655), a load-bearing table fixing block (656), a transmission nut assembly (657), a lower limit bearing (661) and a worm gear reducer. The worm gear reducer is connected to the power assembly, and the lifting module fixing seat (651) is fixed. Connected to the column, the central mounting surface of the lifting module fixed seat (651), the thrust bearing assembly (652), the force sensor (653) and the upper limit bearing (654) are all central through holes, the force sensor (653) is fixed on the upper side of the central mounting surface of the lifting module fixed seat (651), the upper part of the force sensor (653) is fixed to the thrust bearing assembly (652), and the upper limit bearing (654) is fixed on the lower side of the central mounting surface of the lifting module fixed seat (651); the trapezoidal wire The upper end of the lever (655) passes through the upper limit bearing (654), the central mounting surface of the lifting module fixing seat (651) and the force sensor (653) in sequence. The upper end of the trapezoidal screw (655) is suspended and fixed on the rotating part of the thrust bearing assembly (652). The trapezoidal screw (655) is limited upward by the upper limit bearing (654); the lower end of the trapezoidal screw (655) is limited in the horizontal plane by the lower limit bearing (661). The trapezoidal screw (655) The lower end of the lower limit bearing (661) is located at the lower side of the lower limit bearing (661) and is connected to the worm gear reducer; the trapezoidal screw (655) is threadedly connected to the transmission nut assembly (657), the upper side of the transmission nut assembly (657) is fixed with the load-bearing table fixing block (656), and the load-bearing table fixing block (656) is fixed to the corner of the lifting table (20), and the transmission nut assembly (657) is driven to move up and down by the rotation of the trapezoidal screw (655), thereby driving the lifting table (20) to move up and down.

6. The lifting device for aircraft engine preassembly process according to claim 5, characterized in that: The worm gear reducer comprises a coupling upper component (662), a coupling lower component (663), a worm gear component (664) and a worm gear fixing block (665) connected in sequence, the coupling upper component (662) is connected to the lower end of the trapezoidal screw (655), the coupling upper component (662) and the coupling lower component (663) are mutually embedded in the vertical direction and have no limit in the vertical direction, the worm gear component (664) is connected to the power component, and the worm gear fixing block (665) is fixed on the foundation pit embedded component (5).

7. The lifting device for aircraft engine preassembly process according to claim 6, characterized in that: The power assembly includes a main drive motor (605), a commutator, and a transmission shaft. The commutator and the main drive motor (605) are fixed on the foundation pit embedded component (5). The commutator includes a first commutator (631), a second commutator (632), and a third commutator (633). The transmission shaft includes a first transmission shaft (611), a second transmission shaft (612), a third transmission shaft (613), a fourth transmission shaft (614), a fifth transmission shaft (615), and a sixth transmission shaft (616). The output shaft of the main drive motor (605) is connected to the first commutator (631). The output shafts at both ends of the first commutator (631) are respectively connected to one end of the fifth transmission shaft (615) and one end of the sixth transmission shaft (616). The fifth transmission shaft ( The other end of the sixth transmission shaft (615) is connected to the input shaft of the second commutator (632), the other end of the sixth transmission shaft (616) is connected to the input shaft of the third commutator (633), the left and right output shafts of the second commutator (632) are respectively connected to one end of the first transmission shaft (611) and one end of the second transmission shaft (612), the left and right output shafts of the third commutator (633) are respectively connected to one end of the third transmission shaft (613) and one end of the fourth transmission shaft (614), the other end of the first transmission shaft (611), the other end of the second transmission shaft (612), the other end of the third transmission shaft (613) and the other end of the fourth transmission shaft (614) are respectively connected to the input shafts of their corresponding worm gear assemblies (664).

8. The lifting device for aircraft engine preassembly according to claim 3, characterized in that: The counterweight system (40) includes a counterweight device, a main frame fixed pulley assembly and a wire rope assembly. The counterweight device includes a counterweight mass block (431), a counterweight fixed pulley assembly (432), a counterweight fixed pulley fixing block (433), a drum device fixing frame (434), a drum module (435), a drag force module (436), a drum drive motor (437) and a counterweight device energy feeding module (438). The wire rope assembly includes a first wire rope assembly (421), a second wire rope assembly (422) and a third wire rope assembly (423). The main frame fixed pulley assembly is fixed on the main frame pulley mounting frame. One end of the first wire rope assembly (421) and the second wire rope assembly (422) are connected to the lifting point of the load-bearing structure. The other end of the first wire rope assembly (421) and the second wire rope assembly (422) pass through the main frame fixed pulley assembly and are connected to one end of the counterweight mass block (431). The other end of the counterweight mass block (431) The third wire rope assembly (423) is connected to one end thereof, and the other end thereof is wound around the counterweight fixed pulley assembly (432) and wound around the drum module (435). The drum module (435) is connected to one end of the dragging force module (436) via a transmission shaft. The counterweight fixed pulley assembly (432) is fixed to the counterweight fixed pulley fixed block (433). The drum module (435) and the dragging force module (436) are fixed to the drum device fixing frame. (434), the counterweight fixed pulley fixing block (433) and the drum device fixing frame (434) are fixed on the foundation pit embedded part (5), the other end of the drag force module (436) is connected to the drum drive motor (437) and the counterweight device energy feeding module (438) in sequence, the counterweight device energy feeding module (438) is connected to the energy storage device (6), and the counterweight device energy feeding module (438) is used to collect the potential energy during the descent of the lifting platform (20) and convert it into electrical energy.

9. The lifting device for aircraft engine preassembly according to claim 3, characterized in that: A lifting guardrail system and a flap mechanism are provided in the width direction of the load-bearing table (201) for protecting the lifting table (20) during the ascending and descending processes. The flap mechanism is fixed to an opposite side of the load-bearing table (201) via a flip hinge (271). The lifting guardrail system is located on the lower surface of the load-bearing table (201) and corresponds to the position of the flap mechanism. The flap mechanism, the lifting guardrail system and the lifting table (20) are linked.

10. The lifting device for aircraft engine preassembly according to claim 9, characterized in that: The lifting guardrail system comprises a fixed guardrail (241), a first slider group (242), a guardrail bearing frame (243), a transmission spur rack (244), a guardrail driving motor (245), a second slider group (246) and a movable guardrail (248). The movable guardrail (248) is fixed above the fixed guardrail (241). The fixed guardrail (241) is connected to the left and right pillars of the guardrail bearing frame (243) through the first slider group (242) and the second slider group (246). The transmission spur rack (244) is vertically fixed to the middle pillar of the guardrail bearing frame (243). The guardrail driving motor (245) is fixed to the middle pillar of the fixed guardrail (241). The guardrail driving motor (245) is meshed with the transmission spur rack (244) through a gear. The upward and downward movement of the lifting guardrail system is achieved by controlling the rotation direction of the guardrail driving motor (245).

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