CN111704024A - Three-point long-stroke multistage trapezoidal lead screw heavy-load lifting appliance - Google Patents
Three-point long-stroke multistage trapezoidal lead screw heavy-load lifting appliance Download PDFInfo
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- CN111704024A CN111704024A CN202010738011.5A CN202010738011A CN111704024A CN 111704024 A CN111704024 A CN 111704024A CN 202010738011 A CN202010738011 A CN 202010738011A CN 111704024 A CN111704024 A CN 111704024A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
- B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
- B66C1/22—Rigid members, e.g. L-shaped members, with parts engaging the under surface of the loads; Crane hooks
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/16—Applications of indicating, registering, or weighing devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C15/00—Safety gear
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transmission Devices (AREA)
Abstract
The invention discloses a three-point long-stroke multistage trapezoidal lead screw heavy-load lifting appliance, which comprises three heavy-load long-stroke lifting multistage trapezoidal lead screws, a lifting appliance base platform, a lifting operation platform, three groups of motor driving assemblies, three groups of spherical hinges and three cross-shaped joint hinges, wherein each heavy-load long-stroke lifting multistage trapezoidal lead screw is respectively arranged on the lifting appliance base platform through the motor driving assemblies and the spherical hinges, the lifting operation platform is connected with the lower ends of the three heavy-load long-stroke lifting multistage trapezoidal lead screws through the three joint hinges, the heavy-load long-stroke multistage trapezoidal lead screws are driven by the motor driving assemblies to realize long-stroke telescopic lifting motion, and the spherical hinges are connected with the heavy-load long-stroke lifting multistage trapezoidal lead screws through the motor driving assemblies to further bear the axial load of the lifting heavy-load long-stroke lifting multistage trapezoidal lead screws Load distribution and motion precision.
Description
Technical Field
The invention relates to the technical field of automation of engineering machinery hoisting equipment, in particular to an application occasion of a high-precision heavy-load lifting appliance in a narrow space.
Background
In the field of long-stroke hoisting, lifting and transporting of special parts in narrow space, a load-bearing lifting appliance is required to be 3-200 tons, the lifting appliance is required to support lifting, pitching and side-turning motions in the lifting process, the lifting appliance is also required to have horizontal transverse and longitudinal motion expansion capacity, namely, the precision of the transporting lifting motion and the transportation of a large load are ensured, the motion flexibility and high reliability are also ensured, the conventional multi-point hoisting type hoisting equipment has no mature solution, the hoisting precision is low, the hoisting stability is also influenced by the elasticity of a steel wire rope and the sideslip of a multi-circle multi-layer winding steel rope, and the hoisting machine assembly also has the defects of large installation area, low space utilization rate and large gross weight of the equipment.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a 3-200 ton long-stroke lifting and transferring lifting appliance device scheme for special parts in a narrow space, wherein a working platform supports long-stroke lifting, pitching and side-turning motions in the lifting process, namely, the three-point long-stroke multistage trapezoidal screw rod heavy-load lifting appliance device simultaneously meets the requirements of narrow space, heavy load, high precision, flexible motion control, compact structure, convenience in use and maintenance and high reliability.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows.
A three-point long-stroke multistage trapezoidal screw heavy-load lifting appliance comprises three heavy-load long-stroke lifting multistage trapezoidal screws, a first heavy-load long-stroke lifting multistage trapezoidal screw, a second heavy-load long-stroke lifting multistage trapezoidal screw, a third heavy-load long-stroke lifting multistage trapezoidal screw, a lifting appliance base platform, a lifting operation platform, three groups of motor driving components, three groups of spherical hinges and three cross-shaped joint hinges, wherein each heavy-load long-stroke lifting multistage trapezoidal screw is respectively arranged on the lifting appliance base platform through the motor driving components and the spherical hinges, the lifting operation platform is connected with the lower ends of the three heavy-load long-stroke lifting multistage trapezoidal screws through the three joint hinges, the heavy-load long-stroke multistage trapezoidal screws are driven by the motor driving components to realize long-stroke telescopic lifting motion, and the spherical hinges are connected with the heavy-load long-stroke lifting multistage trapezoidal screws through the motor, and then bear the axial load of the long-stroke lifting multistage trapezoidal screw rod of the lifting heavy load, and the spherical hinge is connected with the lifting appliance base platform through the spherical base.
The spherical hinge comprises a spherical platform, a spherical base and a spherical yaw constraint mechanism, one end of the spherical yaw constraint mechanism is connected with the spherical base, the spherical base and the spherical platform are connected in a spherical matching mode, and the contact surface of the spherical base and the spherical platform is of an annular spherical structure.
The spherical yaw constraint mechanism of the spherical hinge at least comprises three transverse rotating shafts, a first transverse rotating shaft, a second transverse rotating shaft and a third transverse rotating shaft, wherein the transverse rotating shafts are connected through a three-shaft hinge plate, the spherical yaw constraint mechanism further comprises a first longitudinal rotating shaft arranged on the upper rotating hinge and a second longitudinal rotating shaft arranged on the lower rotating hinge, and the transverse rotating shafts and the longitudinal rotating shafts are mutually vertical.
The motor driving assembly comprises a speed reducer support, a speed reducer on the speed reducer support, a servo motor connected with the speed reducer, a driving gear connected with the speed reducer, a driven gear meshed with the driving gear, a supporting bearing connected below the driven gear, and a trapezoidal nut arranged on the driven gear and arranged on the supporting bearing seat.
When the spherical hinge is connected with the motor driving assembly, one end of the spherical yaw constraint mechanism is connected with a supporting bearing seat of the motor driving assembly through the longitudinal rotating shaft, and the spherical platform is connected with a supporting bearing seat of the motor driving assembly.
The heavy-load long-stroke lifting multistage trapezoidal screw rod comprises at least two stages of trapezoidal screw rods which are mutually nested, the tail end of each stage of trapezoidal screw rod is provided with an internal thread which is connected with an external thread of the next stage of trapezoidal screw rod, the external thread of the first stage of trapezoidal screw rod is connected with a driven gear (705) provided with the internal thread, and the tail end of the last stage of trapezoidal screw rod is connected with a joint hinge.
The lifting appliance foundation platform and the lifting operation platform are provided with inclination sensors for attitude monitoring.
A plurality of groups of force sensors which are uniformly distributed in an annular mode are arranged at the joint of the spherical hinge and the heavy-load long-stroke lifting multistage trapezoidal screw rod in series and are used for load monitoring and control.
The joint hinge comprises a hinge upper seat, a hinge lower seat, a hinge transverse shaft and a hinge longitudinal shaft, wherein the hinge transverse shaft and the hinge longitudinal shaft are arranged between the hinge upper seat and the hinge lower seat and are mutually vertical.
Due to the adoption of the technical scheme, the technical progress of the invention is as follows.
The invention adopts three groups of multi-stage trapezoidal screw rods distributed in a triangular manner, the multi-stage trapezoidal screw rods are arranged on a basic platform through spherical hinges, the lower ends of the three multi-stage trapezoidal screw rods are connected with a hoisting operation platform through joint bearings, the spherical hinges are provided with force sensors, the hoisting operation platform and the basic platform are provided with inclination sensors, the invention realizes vertical lifting for 3-20 meters in a narrow space, the length of a single-stage trapezoidal screw rod is 2.5 meters, the total stroke of the two-stage screw rods can reach 5 meters, the total stroke of the six-stage screw rods can reach 15 meters, and the total stroke of the 8-stage screw rods can reach 20 meters. The load can reach 3-200 tons of transferring and hoisting operation functions, for example, the trapezoidal screw rod is made of alloy structural steel materials, and when the effective area of the bearing section is 110cm2When the load is larger than 30 tons, the load of the lifting appliance containing three groups of triangular multi-stage trapezoidal lead screws is larger than 90 tons, and the effective area of the bearing section is 11cm2And when the load of the single multistage screw rod is more than 3 tons, the load of the three groups of triangular multistage trapezoidal screw rod lifting appliances is more than 9 tons, and the operation platform also has pitching and side-turning adjusting capabilities.
The multistage trapezoidal screw rod is driven by a servo motor through a speed reducer and a gear set, the basic length of the multistage trapezoidal screw rod is short when the multistage trapezoidal screw rod contracts, the basic length of the multistage trapezoidal screw rod is in a multistage multiple rate relation with the basic length when the multistage trapezoidal screw rod extends, and meanwhile, the trapezoidal screw rod has self-locking capacity and ensures the lifting safety when no power is supplied.
The invention meets the multiple requirements of narrow space, heavy load, long stroke, high precision, precise speed regulation, no impact, flexible movement, adjustable gravity center adaptation, compact structure, automation, energy conservation, environmental protection and high reliability. The problems of heavy load, load distribution and motion precision in a vertical narrow space are solved well, and the method can be preferentially applied to the fields of lifting and transferring heavy components in narrow spaces and the like.
Drawings
FIG. 1 is a schematic view of the elongated state assembly of the present invention;
FIG. 2 is a schematic view of the collapsed assembly of the present invention;
FIG. 3 is a schematic view of the motor drive assembly of the present invention
FIG. 4 is a schematic view of the spherical hinge, motor drive assembly and force sensor connection of the present invention;
FIG. 5 is a schematic view of the spherical hinge structure of the present invention;
FIG. 6 is a schematic view of the connection structure of the multistage trapezoidal screw, the spherical hinge, the motor driving assembly, the force sensor and the joint hinge according to the present invention;
FIG. 7 is a schematic structural view of the cross-joint hinge of FIGS. 1 and 2;
fig. 8 is a schematic structural view of the spherical yaw restraining mechanism in fig. 5 and 6.
Wherein: 1-first heavy-load long-stroke lifting multistage trapezoidal screw rod, 2-second heavy-load long-stroke lifting multistage trapezoidal screw rod, 3-third heavy-load long-stroke lifting multistage trapezoidal screw rod, 4-sling foundation platform, 5-hoisting operation platform, 6-spherical hinge, 9-cross joint hinge, 12-motor driving component, 601-spherical platform, 602-spherical base, 603-spherical yaw constraint mechanism, 611-upper rotating hinge, 612-lower rotating hinge 612, 613-triaxial hinge plate, 701-servo motor, 702-speed reducer, 703-speed reducer bracket, 704-driving gear, 705-driven gear, 706-trapezoidal nut, 707-supporting bearing, 708-supporting bearing seat, 801-force sensor, 803-laser calibration sensor, 111-first-stage trapezoidal screw rod, 112-second-stage trapezoidal screw rod, 113-third-stage trapezoidal screw rod, 622-first transverse rotating shaft, 623-second transverse rotating shaft, 624-third transverse rotating shaft, 621-first longitudinal rotating shaft, 625-second longitudinal rotating shaft, 901-hinge upper seat, 902-hinge longitudinal shaft, 903-hinge transverse shaft and 903-hinge lower seat.
Detailed Description
The present invention will be described in further detail with reference to specific examples.
A three-point long-stroke multistage trapezoidal screw heavy-load lifting appliance comprises three heavy-load long-stroke lifting multistage trapezoidal screws, a first heavy-load long-stroke lifting multistage trapezoidal screw 1, a second heavy-load long-stroke lifting multistage trapezoidal screw 2, a third heavy-load long-stroke lifting multistage trapezoidal screw 3, a lifting appliance base platform 4, a lifting operation platform 5, three groups of motor driving assemblies 12, three groups of spherical hinges 6 and three cross-shaped joint hinges 9, wherein each heavy-load long-stroke lifting multistage trapezoidal screw is respectively arranged on the lifting appliance base platform 4 through the motor driving assemblies 12 and the spherical hinges 6, the lifting operation platform 5 is connected with the lower ends of the three heavy-load long-stroke lifting multistage trapezoidal screws 1 through the three joint hinges 9, the heavy-load long-stroke multistage trapezoidal screws are driven by the motor driving assemblies 12 to realize long-stroke telescopic lifting motion, the spherical hinges 6 are connected with the heavy-load long-stroke lifting multistage trapezoidal screws 1 through the motor, and further bearing the axial load of the lifting heavy-load long-stroke lifting multistage trapezoidal screw rod, wherein the spherical hinge 6 is connected with the lifting appliance base platform 4 through the spherical base 203.
The spherical hinge 6 comprises a spherical platform 601, a spherical base 602 and a spherical yaw constraint mechanism 603, one end of the spherical yaw constraint mechanism 603 is connected with the spherical base 602, the spherical base 602 and the spherical platform 601 are connected in a spherical fit manner, and the contact surface of the spherical hinge is in an annular spherical structure.
The spherical yaw constraining mechanism 603 of the spherical hinge 6 at least comprises three transverse rotating shafts, a first transverse rotating shaft 622, a second transverse rotating shaft 623 and a third transverse rotating shaft 624, wherein the transverse rotating shafts are connected through a three-shaft hinge plate 613, the spherical yaw constraining mechanism further comprises a first longitudinal rotating shaft 621 arranged on the upper rotating hinge 611 and a second longitudinal rotating shaft 625 arranged on the lower rotating hinge 612, and the transverse rotating shaft and the longitudinal rotating shaft are perpendicular to each other.
The motor driving assembly 12 comprises a speed reducer support 703, a speed reducer 702 on the speed reducer support 703, a servo motor 701 connected with the speed reducer 702, a driving gear 704 connected with the speed reducer 702, a driven gear 705 engaged with the driving gear 704, a supporting bearing 707 connected below the driven gear 705, wherein the supporting bearing 707 is arranged on a supporting bearing seat 708, and a trapezoidal nut 706 is further arranged on the driven gear 705.
When the spherical hinge 6 is connected to the motor driving assembly 12, one end of the spherical yaw constraining mechanism 603 is connected to the supporting bearing seat 708 of the motor driving assembly 12 through the longitudinal rotating shaft 625, and the spherical platform 602 is connected to the supporting bearing seat 708 of the motor driving assembly 12.
The heavy-duty long-stroke lifting multistage trapezoidal screw comprises at least two stages of trapezoidal screws which are mutually nested, a first-stage trapezoidal screw 111, a second-stage trapezoidal screw 112, a third-stage trapezoidal screw 113, a fourth-stage trapezoidal screw 114, a fifth-stage trapezoidal screw 115 and a sixth-stage trapezoidal screw 116, wherein an internal thread is arranged at the tail end of each stage of trapezoidal screw and is connected with an external thread of the next-stage trapezoidal screw, the external thread of the topmost stage trapezoidal screw 111 is connected with a driven gear 705 which is provided with an internal thread, specifically, the top trapezoidal screw can be connected with a trapezoidal nut 706 arranged on the driven gear 705, and the tail end of the last stage trapezoidal screw is connected.
The three joint hinges 9 have axial yaw constraint rigidity and only support roll and pitch degrees of freedom. The joint hinge 9 is a cross joint bearing, and can transmit torque and tension and pressure and simultaneously support left and right and front and back overturning.
The lifting appliance base platform 4 and the lifting operation platform 5 are provided with an inclination angle sensor 802 for attitude monitoring. The inclination angle sensor is a product available in the existing market, for example, a tin-free north micro-sensing BWH525CAN bus output double-shaft inclination angle sensor, the measuring range is +/-10 degrees, and the measuring precision is 0.005 degree. The measuring axes are perpendicular to each other on the horizontal plane around the horizontal X-axis and around the horizontal Y-axis, and the X, Y axes are perpendicular to each other on the horizontal plane. The inclination angle sensor can read the included angle of the X-Y axes of the lifting appliance basic platform 4 or the lifting operation platform 5 and the horizontal plane in a communication mode, and further perform attitude control adjustment.
A plurality of groups of force sensors 801 which are uniformly distributed in an annular mode are arranged in series at the joint of the spherical hinge 6 and the heavy-load long-stroke lifting multistage trapezoidal screw rod and are used for load monitoring and control.
The joint hinge 9 comprises a hinge upper seat 901, a hinge lower seat 904, a hinge transverse shaft 903 and a hinge longitudinal shaft 902 which are arranged between the hinge upper seat 901 and the hinge lower seat 904, wherein the hinge transverse shaft 903 and the hinge longitudinal shaft 902 are perpendicular to each other.
The working process is as follows: in the hoisting and lifting process, taking a single group of multi-stage lead screws as an example, a servo motor 701 drives the uppermost trapezoidal nut 706 of the multi-stage mutually-nested trapezoidal lead screws to rotate clockwise through a speed reducer 702, a driving gear 704 and a driven gear 705 of a gear set, so as to drive the multi-stage mutually-nested trapezoidal lead screws to rotate, because the last-stage six-stage trapezoidal lead screw 116 of the multi-stage trapezoidal lead screws is connected with a hoisting operation platform 5 through a joint hinge 9 and keeps a rotating and static state, other trapezoidal lead screws comprise a first-stage trapezoidal lead screw 111, a second-stage trapezoidal lead screw 112, a third-stage trapezoidal lead screw 113, a fourth-stage trapezoidal lead screw 114 and a fifth-stage trapezoidal lead screw 115, the other trapezoidal lead screws rotate clockwise according to the natural torque, and simultaneously the last-stage trapezoidal lead screw 116, the first-stage trapezoidal lead screw 111, the second-stage trapezoidal lead screw, until reaching the minimum mechanical limit contraction length of the multistage screw rod.
In the process of descending the lifting appliance, taking a single group of multi-stage lead screws as an example, a servo motor 701 drives the uppermost trapezoidal nut 706 of the multi-stage mutually-nested trapezoidal lead screws to rotate anticlockwise through a speed reducer 702, a driving gear 704 and a driven gear 705 of a gear set, since the six-stage trapezoidal screw 116 at the final stage of the multistage trapezoidal screw is connected with the hoisting operation platform 5 through the joint hinge 9 to keep a rotating static state, the other trapezoidal screw rods comprise a first-stage trapezoidal screw rod 111, a second-stage trapezoidal screw rod 112, a third-stage trapezoidal screw rod 113, a fourth-stage trapezoidal screw rod 114 and a fifth-stage trapezoidal screw rod 115, and the screw rod rotates anticlockwise according to the natural torque, and meanwhile, the six-stage trapezoidal screw rod 116, the one-stage trapezoidal screw rod 111, the two-stage trapezoidal screw rod 112, the three-stage trapezoidal screw rod 113, the four-stage trapezoidal screw rod 114 and the five-stage trapezoidal screw rod 115 at the last stage are nested and extend until the maximum mechanical limit extension length of the multistage screw rod is reached.
Claims (9)
1. The utility model provides a multistage trapezoidal lead screw heavy load hoist of three long strokes of heavy load, includes the multistage trapezoidal lead screw of three long strokes of heavy load lift, first heavy load long stroke lift multistage trapezoidal lead screw (1), the multistage trapezoidal lead screw of long stroke lift of second heavy load (2) and the multistage trapezoidal lead screw of long stroke lift (3) of third heavy load, hoist foundation platform (4), hoist and mount operation platform (5), three motor drive assembly (12) of group, three spherical hinge (6) of group and three cross joint hinge (9), its characterized in that: every multistage trapezoidal lead screw of heavy load long stroke lift is installed on hoist foundation platform (4) through motor drive subassembly (12) and spherical hinge (6) respectively, and hoist and mount operation platform (5) then are connected through three joint hinge (9) and the multistage trapezoidal lead screw lower extreme of three heavy load long stroke lifts, the multistage trapezoidal lead screw of heavy load long stroke passes through motor drive subassembly (12) drive and realizes the flexible elevating movement of long stroke, and spherical hinge (6) are connected through motor drive subassembly (12) and the multistage trapezoidal lead screw (1) of heavy load long stroke lift, and then bear the axial load of the multistage trapezoidal lead screw of lift heavy load long stroke lift, and spherical hinge (6) are connected through spherical base (203) and hoist foundation platform (4).
2. The three-point long-stroke multistage trapezoidal lead screw heavy-duty lifting appliance according to claim 1, characterized in that: the spherical hinge (6) comprises a spherical platform (601), a spherical base (602) and a spherical yaw constraint mechanism (603), one end of the spherical yaw constraint mechanism (603) is connected with the spherical base (602), the spherical base (602) is connected with the spherical platform (601) in a spherical matching mode, and the contact surface of the spherical hinge is of an annular spherical structure.
3. The three-point long-stroke multistage trapezoidal lead screw heavy-duty lifting appliance according to claim 2, characterized in that: spherical surface driftage restraint mechanism (603) of spherical surface hinge (6), at least, include three transverse rotating shaft, first transverse rotating shaft (622), second transverse rotating shaft (623) and third transverse rotating shaft (624), transverse rotating shaft passes through triaxial hinge plate (613) and connects, still including setting up first longitudinal rotating shaft (621) on last rotatory hinge (611), set up second longitudinal rotating shaft (625) on rotatory hinge (612) down, transverse rotating shaft and longitudinal rotating shaft mutually perpendicular.
4. The three-point long-stroke multistage trapezoidal lead screw heavy-duty lifting appliance according to claim 1, characterized in that: the motor driving assembly (12) comprises a speed reducer support (703), a speed reducer (702) on the speed reducer support (703), a servo motor (701) connected with the speed reducer (702), a driving gear (704) connected with the speed reducer (702), a driven gear (705) meshed with the driving gear (704), a supporting bearing (707) connected below the driven gear (705), the supporting bearing (707) is arranged on a supporting bearing seat (708), and a trapezoidal nut (706) is further arranged on the driven gear (705).
5. The three-point long-stroke multistage trapezoidal lead screw heavy-duty lifting appliance according to claim 4, characterized in that: when the spherical hinge (6) is connected with the motor driving assembly (12), one end of the spherical yaw constraint mechanism (603) is connected with a supporting bearing seat (708) of the motor driving assembly (12) through a longitudinal rotating shaft (625), and the spherical platform (602) is connected with the supporting bearing seat (708) of the motor driving assembly (12).
6. The three-point long-stroke multistage trapezoidal lead screw heavy-duty lifting appliance according to claim 4, characterized in that: the heavy-load long-stroke lifting multistage trapezoidal screw rod comprises at least two stages of trapezoidal screw rods which are nested with each other, the tail end of each stage of trapezoidal screw rod is provided with an internal thread which is connected with an external thread of the next stage of trapezoidal screw rod, the trapezoidal screw rod (111 external thread is connected with a driven gear (705) provided with the internal thread, and the tail end of the last stage of trapezoidal screw rod is connected with a joint hinge (9).
7. The three-point long-stroke trapezoidal lead screw heavy-duty lifting appliance according to claim 1, characterized in that: the lifting appliance foundation platform (4) and the lifting operation platform (5) are provided with inclination sensors (802) for attitude monitoring.
8. The three-point long-stroke multistage trapezoidal lead screw heavy-duty lifting appliance according to claim 1, characterized in that: the joint of the spherical hinge (6) and the heavy-load long-stroke lifting multistage trapezoidal screw rod (1) is provided with a plurality of groups of force sensors (801) which are uniformly distributed in an annular mode in series for load monitoring control.
9. The three-point long-stroke multistage trapezoidal lead screw heavy-duty lifting appliance according to claim 1, characterized in that: the joint hinge (9) comprises a hinge upper seat (901), a hinge lower seat (904) and a hinge transverse shaft (903) and a hinge longitudinal shaft (902) which are arranged between the hinge upper seat (901) and the hinge lower seat (904), wherein the hinge transverse shaft (903) and the hinge longitudinal shaft (902) are mutually vertical.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010738011.5A CN111704024A (en) | 2020-07-28 | 2020-07-28 | Three-point long-stroke multistage trapezoidal lead screw heavy-load lifting appliance |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010738011.5A CN111704024A (en) | 2020-07-28 | 2020-07-28 | Three-point long-stroke multistage trapezoidal lead screw heavy-load lifting appliance |
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| CN111704024A true CN111704024A (en) | 2020-09-25 |
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| CN202010738011.5A Pending CN111704024A (en) | 2020-07-28 | 2020-07-28 | Three-point long-stroke multistage trapezoidal lead screw heavy-load lifting appliance |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112744691A (en) * | 2021-01-08 | 2021-05-04 | 中国石油化工股份有限公司西北油田分公司 | Universal rotary lifting appliance structure for hoisting |
| CN114086816A (en) * | 2021-10-21 | 2022-02-25 | 西安华欧精密机械有限责任公司 | Multi-section lifting mast |
-
2020
- 2020-07-28 CN CN202010738011.5A patent/CN111704024A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112744691A (en) * | 2021-01-08 | 2021-05-04 | 中国石油化工股份有限公司西北油田分公司 | Universal rotary lifting appliance structure for hoisting |
| CN114086816A (en) * | 2021-10-21 | 2022-02-25 | 西安华欧精密机械有限责任公司 | Multi-section lifting mast |
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