CN116216583A

CN116216583A - Large-stroke quick lifting spiral elevator applicable to small space

Info

Publication number: CN116216583A
Application number: CN202310289947.8A
Authority: CN
Inventors: 刘昌明; 武壮; 刘可为; 王毅铭; 周承凯
Original assignee: Wuhan University of Science and Engineering WUSE
Current assignee: Wuhan University of Science and Engineering WUSE
Priority date: 2023-03-21
Filing date: 2023-03-21
Publication date: 2023-06-06

Abstract

The invention discloses a large-stroke quick lifting spiral elevator suitable for a small space, which comprises a box body, a box cover fixedly connected to the upper surface of the box body, a power reduction system, a multi-stage screw transmission system, a sleeve telescopic system and a lifting platform device, wherein a turbine shaft is arranged in the box body, the multi-stage screw transmission system, the sleeve telescopic system and the lifting platform device are sequentially arranged at the upper part of the turbine shaft, and the power reduction system is arranged at the lower part of the turbine shaft. The whole machine equipment is small in size, adopts multistage expansion and contraction, is large in stroke, is beneficial to large-stroke lifting operation in a small space, adopts screw transmission, is low in noise and stable in operation, does not need to reserve expansion space for a transmission screw like a traditional screw transmission underground hole, and ensures that the ground integrity is not damaged.

Description

Large-stroke quick lifting spiral elevator applicable to small space

Technical Field

The application relates to the technical field of elevators, in particular to a large-stroke quick lifting spiral elevator applicable to a small space.

Background

The lifter is used as an efficient jacking device and is widely applied to the fields of coal mines, bridges, vehicles, aviation and the like. The variety and the technology of large lifting devices in the field of lifting devices are very perfect, but the special large-stroke rapid lifting small lifting devices which are suitable for small space and do not need to be downwards perforated are very rare. The main structural types of small elevators widely used in the market at present are scissor lifts, telescopic cylinder lifts, mast lifts and screw lifts. The lifting mechanisms have the telescopic characteristic, so that the volume of the equipment can be effectively reduced to carry out lifting operation in a small space. But the scissor type lifter and the sleeve cylinder type lifter are mainly powered by hydraulic pressure, the lifting speed is low, the working stroke is short, hydraulic oil is easy to leak in hydraulic transmission, the motion stability and accuracy of an executing part are affected, a working site is polluted, and later maintenance is difficult. The mast type lifter adopts a motor to provide power to lift quickly, but has short working stroke, small lifting load and low operation stability.

The screw rod lifter overcomes the defects of low lifting speed, easiness in leakage of hydraulic oil and the like of the hydraulic lifter, the lifting device forms a sliding screw pair through the screw rod and the nut, the rotation freedom degree of the nut is limited, and the nut is driven to realize axial lifting motion by means of rotation of the screw rod. Although screw elevator simple structure goes up and down fast, the lift stroke is decided by the height of screw rod, and the installation of equipment need be in the bottom drilling be used for installing the screw rod, leads to the mechanism overall structure great, needs to destroy former ground structure, can't satisfy the quick lift operation requirement under the specific space.

In addition, the conventional design is that the worm shaft directly drives the lowermost screw rod, and then power is transmitted upwards one by one, so that the power is also designed to be twice as fast, but in practice, the power is often blocked due to unreasonable distribution of force energy parameters.

In summary, the existing elevator platforms have certain defects and shortcomings, and are difficult to meet the lifting tasks of rapid lifting in small space without damaging the ground and large lifting distance.

Disclosure of Invention

The invention aims to provide a large-stroke quick lifting screw type lifter suitable for small space, so as to solve the problems in the prior art.

The embodiment of the application adopts the following technical scheme:

the utility model provides a be applicable to big stroke quick lift screw elevator under little space, includes the box, and the inside of box is provided with power deceleration system, and the fixedly connected with case lid of box upper surface, the top of case lid is provided with multistage lead screw transmission system and sleeve telescopic system, multistage lead screw transmission system is located the inside of sleeve telescopic system.

Further, the power deceleration system comprises a servo motor, a worm shaft and a rotating turbine, the servo motor is fixedly connected with the box body through a connecting sleeve, one end of the worm shaft is connected with an output shaft of the servo motor, the other end of the worm shaft is connected with the box body through a second tapered roller bearing, the worm shaft is matched with the rotating turbine, and the rotating turbine is fixedly connected with the turbine shaft through a fixed flat key.

Further, the bottom of the box body is fixedly connected with a ground base through a check bolt, the lower part of the turbine shaft is connected with the box body through a first tapered roller bearing, the middle part of the turbine shaft is connected with a box cover through a deep groove ball bearing, and the upper part of the turbine shaft is in the shape of a hexagonal spline shaft; a lubricating oil pool is formed at the bottom of the box body, the first tapered roller bearing is located in the lubricating oil pool, and a spacer is arranged on the surface of the turbine shaft.

Further, multistage lead screw transmission system includes down lead screw, well lead screw and last lead screw, and lower lead screw bottom links firmly with the case lid through first bolt and second bolt, interior hexagon through-hole has been seted up to well lead screw below, turbine shaft passes through hexagon hole and well lead screw cooperation connection, and lower lead screw upper portion is equipped with left-hand internal thread, and well lead screw outer wall is equipped with left-hand external screw thread, and well lead screw external screw thread and lower lead screw internal screw thread constitute left-hand sliding screw pair, goes up the lead screw top and goes up seat fixed connection through seventh bolt and eighth bolt, goes up the lead screw outer wall and is equipped with right-hand external screw thread, and well lead screw inner wall is equipped with right-hand internal screw thread, and well lead screw internal screw and last lead screw external screw constitute right-hand sliding screw pair.

Further, the sleeve telescopic system comprises a lower sheath, a middle sheath and an upper sheath which are sequentially arranged from the outermost layer to the innermost layer, the lower sheath is fixedly connected with the box cover through a third bolt and a fourth bolt, sliding key grooves are formed in the inner wall of the lower sheath and the inner wall of the middle sheath, the lower end of the outer wall of the middle sheath is fixedly connected with the first guiding flat key through an eleventh bolt, and the outer wall of the middle sheath forms a sliding pair with the sliding key grooves of the inner wall of the lower sheath through the first guiding flat key.

Further, the lower end of the outer wall of the upper sheath is fixedly connected with a second guide flat key through a twelfth bolt, the upper sheath and the middle sheath form a sliding pair through the second guide flat key, and the top of the upper sheath is fixedly connected with the upper seat through a fifth bolt and a sixth bolt; the upper end of the lower sheath is fixedly connected with a lower check ring through a ninth bolt, and the upper end of the middle sheath is fixedly connected with an upper check ring through a tenth bolt.

The application can achieve the following beneficial effects:

firstly, in the invention, the whole equipment has smaller volume, adopts multistage expansion and contraction, has large stroke, is beneficial to large-stroke hoisting operation in a small space, adopts screw transmission, has low noise and stable operation, does not need to reserve expansion space for a transmission screw like the traditional screw transmission underground hole, and ensures that the ground integrity is not damaged.

Secondly, in the invention, the inner and outer sliding screw pairs are formed in a screw rod nesting mode, so that the transmission screw rod has the telescopic property, the initial height of the equipment is reduced, the working stroke of the lifter is increased, the multistage meshing synchronous operation screw rod is adopted for telescopic movement, and the inner and outer screw pairs are simultaneously in screw transmission during lifting operation, so that the lifting speed is faster than that of the traditional screw rod transmission equipment, and the working stroke and lifting speed of the lifter are greatly improved; according to the invention, the screw transmission system adopts the trapezoidal screws to form the sliding screw pair, so that the stop operation and self-locking requirements of any position can be met, and the safety performance, transmission precision and operation stability of the equipment are improved. The turbine shaft upper portion is the shape of hexagonal spline shaft to the transmission moment of torsion gives the middle lead screw, and the driving part is the middle lead screw like this, and when middle lead screw rotation, go up lead screw and lower lead screw and knead simultaneously and move simultaneously, play speed doubling's effect, the distribution of force energy parameter simultaneously, compare in power and drive middle lead screw and last lead screw simultaneous movement from the lower lead screw, it is more reasonable, and can not cause the card to stop.

Thirdly, in the invention, the external sleeve telescopic system of the elevator isolates the influence of the outside on the driving screw rod, so that the equipment forms a closed space, the structural integrity is stronger, the elevator is suitable for lifting tasks under more complex working conditions, and the later maintenance cost is reduced. In the invention, the lubricating oil pool formed on the bottom wall in the box body has good lubricating effect on the transmission part, and effectively reduces friction failure, vibration and noise of the transmission part.

Fourth, in the invention, the multi-stage meshing synchronous operation screw rod is adopted as the main bearing component, different materials are adopted to process and design different load capacities for the screw rod according to different working condition requirements, the production cost is greatly reduced, the bearing capacity of the elevator is improved, the whole parts of the elevator are fewer, the installation is convenient, the matching is tight, the structural strength is high, and the long-time hoisting operation requirement and the maintenance requirement of the elevator are facilitated.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute an undue limitation to the application. In the drawings:

fig. 1 is: the invention is a schematic diagram of a front section structure;

fig. 2 is: the schematic drawing of the structure of the box body is cut down;

fig. 3 is: the invention discloses a schematic diagram of a front section structure of a lower lead screw, a middle lead screw and an upper lead screw;

fig. 4 is: the invention discloses a schematic diagram of a front section structure of a lower sheath, a middle sheath and an upper sheath.

In the figure: 1. a case; 2. a lubricating oil pool; 3. a first tapered roller bearing; 4. fixing a flat key; 5. a turbine shaft; 6. a spacer; 7. rotating the turbine; 8. connecting sleeves; 9. a first bolt; 10. a third bolt; 11. a lower sheath; 12. an eleventh bolt; 13. a first guide flat key; 14. a lower retainer ring; 15. a middle sheath; 16. a tenth bolt; 17. an upper retainer ring; 18. a jacket is arranged; 19. a fifth bolt; 20. a seventh bolt; 21. a lead screw is arranged; 22. an eighth bolt; 23. a sixth bolt; 24. an upper seat; 25. a middle lead screw; 26. a second guide flat key; 27. a twelfth bolt; 28. a ninth bolt; 29. a lower lead screw; 30. a worm shaft; 31. a servo motor; 32. a case cover; 33. a fourth bolt; 34. a second bolt; 35. deep groove ball bearings; 36. and a second tapered roller bearing.

Detailed Description

For the purposes, technical solutions and advantages of the present application, the technical solutions of the present application will be clearly and completely described below with reference to specific embodiments of the present application and corresponding drawings. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

The following describes in detail the technical solutions provided by the embodiments of the present application with reference to the accompanying drawings.

Referring to fig. 1-4, the present invention provides a technical solution for a large-stroke fast lifting screw type lifter suitable for small space:

the utility model provides a be applicable to quick lift screw elevator of big stroke under little space, includes box 1, and the inside of box 1 is provided with power reduction system, and the fixedly connected with case lid 32 of box 1 upper surface, the top of case lid 32 is provided with multistage lead screw transmission system and sleeve telescopic system, multistage lead screw transmission system is located the inside of sleeve telescopic system.

The power deceleration system comprises a servo motor 31, a worm shaft 30 and a rotating turbine 7, wherein the servo motor 31 is fixedly connected with the box body 1 through a connecting sleeve 8, one end of the worm shaft 30 is connected with an output shaft of the servo motor 31, the other end of the worm shaft 30 is connected with the box body 1 through a second tapered roller bearing 36, the worm shaft 30 is matched with the rotating turbine 7, and the rotating turbine 7 is fixedly connected with the turbine shaft 5 through a fixed flat key 4.

The bottom of the box body 1 is fixedly connected with a ground base through a check bolt, the lower part of the turbine shaft 5 is connected with the box body 1 through a first tapered roller bearing 3, the middle part of the turbine shaft 5 is connected with a box cover 32 through a deep groove ball bearing 35, and the upper part of the turbine shaft 5 is in the shape of a hexagonal spline shaft; the bottom of the box body 1 is provided with the lubricating oil pool 2, the first tapered roller bearing 3 is positioned in the lubricating oil pool 2, the surface of the turbine shaft 5 is provided with the shock insulator 6, the lubricating oil pool 2 formed on the inner bottom wall of the box body 1 has good lubricating effect on the transmission parts, and friction failure, vibration and noise of the transmission parts are effectively reduced.

The multistage screw transmission system comprises a lower screw 29, a middle screw 25 and an upper screw 21, wherein the bottom of the lower screw 29 is fixedly connected with a box cover 32 through a first bolt 9 and a second bolt 34, an inner hexagonal through hole is formed below the middle screw, the turbine shaft 5 is connected with the middle screw 25 in a matched manner through the hexagonal hole, a left-handed internal thread is formed at the upper part of the lower screw 29, a left-handed external thread is formed on the outer wall of the middle screw 25, the left-handed external thread and the internal thread of the lower screw 29 form a left-handed sliding screw pair, the top of the upper screw 21 is fixedly connected with an upper seat 24 through a seventh bolt 20 and an eighth bolt 22, the outer wall of the upper screw 21 is provided with a right-handed external thread, the inner wall of the middle screw 25 is provided with a right-handed internal thread, the internal and external sliding screw pair is formed in a screw nesting manner, so that the transmission screw has a telescopic property, the starting height of the device is reduced, the working stroke of the lifter is increased, the multistage meshing synchronous operation screw rod is adopted to carry out telescopic motion, and the inner screw pair and the outer screw pair simultaneously carry out screw transmission during lifting operation, so that the lifting speed is higher than that of the traditional screw transmission device, the working stroke and the lifting speed of the lifter are greatly improved, the trapezoidal screw rods are adopted to form the sliding screw pair in the screw transmission system, the stop operation and the self-locking requirements at any position can be met, the safety performance, the transmission precision and the operation stability of the device are improved, the multistage meshing synchronous operation screw rod is adopted as a main bearing part, different load capacities can be designed by adopting different materials according to different working condition requirements, the production cost is greatly reduced, the bearing capacity of the lifter is improved, the whole parts of the lifter are fewer, the installation is convenient, the matching is tight, the structural strength is high, and the long-time hoisting operation requirement and the maintenance requirement of the lifter are facilitated.

The conventional design is that the worm shaft directly drives the lowermost screw rod, and then the power is transmitted upwards one by one, so that the power is also designed to be twice the speed, but in practice, the power is often blocked due to unreasonable distribution of force energy parameters. The upper part of the turbine shaft 5 is in the shape of a hexagonal spline shaft so as to conveniently transmit torque to the middle screw rod 25, so that the driving part is the middle screw rod 25, the middle screw rod 25 rotates, the upper screw rod 21 and the lower screw rod 29 are simultaneously kneaded and simultaneously move, the effect of doubling the speed is achieved, and meanwhile, the force energy parameters are distributed, compared with the fact that the power drives the middle screw rod and the upper screw rod to simultaneously move from the lowest screw rod, the torque transmission device is more reasonable, and no clamping is caused.

The sleeve telescopic system comprises a lower sheath 11, a middle sheath 15 and an upper sheath 18 which are sequentially arranged from the outermost layer to the innermost layer, wherein the lower sheath 11 is fixedly connected with a box cover 32 through a third bolt 10 and a fourth bolt 33, sliding key grooves are formed in the inner wall of the lower sheath 11 and the inner wall of the middle sheath 15, the lower end of the outer wall of the middle sheath 15 is fixedly connected with a first guide flat key 13 through an eleventh bolt 12, and a sliding pair is formed by the outer wall of the middle sheath 15 and the sliding key grooves in the inner wall of the lower sheath 11 through the first guide flat key 13.

The lower end of the outer wall of the upper sheath 18 is fixedly connected with a second guide flat key 26 through a twelfth bolt 27, the upper sheath 18 and the middle sheath 15 form a sliding pair through the second guide flat key 26, and the top of the upper sheath 18 is fixedly connected with the upper seat 24 through a fifth bolt 19 and a sixth bolt 23.

The lower retainer ring 14 is fixedly connected to the upper end of the lower jacket 11 through the ninth bolt 28, the upper retainer ring 17 is fixedly connected to the upper end of the middle jacket 15 through the tenth bolt 16, and the external sleeve telescopic system of the lifter isolates the influence of the outside on the transmission screw, so that the device forms a closed space, the structural integrity is stronger, the lifter is suitable for lifting tasks under more complex working conditions, and the later maintenance cost is reduced.

In the invention, the whole equipment has smaller volume, adopts multistage expansion and contraction, has large stroke, is beneficial to large-stroke lifting operation in a small space, adopts screw transmission, has low noise and stable operation, does not need to reserve expansion space for a transmission screw like the traditional screw transmission underground hole, and ensures that the ground integrity is not damaged.

Working principle: when the quick lifting screw type lifter suitable for the small space lower large stroke is used, the servo motor 31 transmits original power to the worm shaft 30, after the speed reduction effect of the worm pair of the rotating turbine 7, the power is transmitted to the turbine shaft 5, the turbine shaft 5 is connected with the middle screw rod 25 through the hexagonal hole groove, the middle screw rod 25 is driven to rotate in a screw mode, the sliding screw pair formed by the middle screw rod 25, the lower screw rod 29 and the upper screw rod 21 is lifted by one screw pitch each time, the lifter achieves double-stroke telescopic motion, a larger telescopic stroke is obtained when the height of the lifter is kept, the upper screw rod 21 stretches or contracts to drive the upper jacket 18 to stretch or contract, the upper jacket 18 translates up and down to drive the middle jacket 15 to stretch or contract up and down through the second guide flat key 26, the stretching or contracting of the whole telescopic sleeve system is achieved, the lifting speed is faster than that of a traditional screw rod transmission device, and the working stroke and the lifting speed of the lifter are greatly improved.

It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises the element.

The foregoing is merely exemplary of the present application and is not intended to limit the present application. Various modifications and changes may be made to the present application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc. which are within the spirit and principles of the present application are intended to be included within the scope of the claims of the present application.

Claims

1. The utility model provides a be applicable to quick lift screw elevator of big stroke under little space, its characterized in that, including box (1), the inside of box (1) is provided with power deceleration system, fixedly connected with case lid (32) of box (1) upper surface, the top of case lid (32) is provided with multistage lead screw transmission system and sleeve telescopic system, multistage lead screw transmission system is located the inside of sleeve telescopic system.

2. The spiral elevator suitable for small-space large-stroke rapid lifting and lowering according to claim 1, wherein the power deceleration system comprises a servo motor (31), a worm shaft (30) and a rotating turbine (7), the servo motor (31) is fixedly connected with the box body (1) through a connecting sleeve (8), one end of the worm shaft (30) is connected with an output shaft of the servo motor (31), the other end of the worm shaft (30) is connected with the box body (1) through a second tapered roller bearing (36), the worm shaft (30) is matched with the rotating turbine (7), and the rotating turbine (7) is fixedly connected with a turbine shaft (5) through a fixed flat key (4).

3. The quick lifting screw type lifter suitable for small space and large stroke according to claim 2 is characterized in that the bottom of the box body (1) is fixedly connected with a ground base through a check bolt, the lower part of the turbine shaft (5) is connected with the box body (1) through a first tapered roller bearing (3), the middle part of the turbine shaft (5) is connected with a box cover (32) through a deep groove ball bearing (35), and the upper part of the turbine shaft (5) is in the shape of a hexagonal spline shaft; the bottom of the box body (1) is provided with a lubricating oil pool (2), the first tapered roller bearing (3) is positioned in the lubricating oil pool (2), and a spacer (6) is arranged on the surface of the turbine shaft (5).

4. The rapid lifting screw type elevator applicable to small space lower large travel according to claim 3, wherein the multi-stage screw transmission system comprises a lower screw (29), a middle screw (25) and an upper screw (21), the bottom of the lower screw (29) is fixedly connected with a box cover (32) through a first bolt (9) and a second bolt (34), an inner hexagonal through hole is formed below the middle screw, the turbine shaft (5) is connected with the middle screw (25) through a hexagonal hole in a matched manner, left-handed internal threads are formed on the upper portion of the lower screw (29), left-handed external threads are formed on the outer wall of the middle screw (25), left-handed sliding screw pairs are formed by the external threads of the middle screw (25) and the internal threads of the lower screw (29), the top of the upper screw (21) is fixedly connected with an upper seat (24) through a seventh bolt (20) and an eighth bolt (22), right-handed external threads are formed on the outer wall of the upper screw (21), right-handed internal threads are formed on the inner wall of the middle screw (25), and a right-handed sliding screw pair is formed by the internal threads of the middle screw (25) and the external threads of the upper screw (21).

5. The spiral elevator suitable for small-space large-stroke rapid lifting and lowering of claim 4, wherein the sleeve telescopic system comprises a lower sheath (11), a middle sheath (15) and an upper sheath (18) which are sequentially arranged from the outermost layer to the innermost layer, the lower sheath (11) is fixedly connected with a box cover (32) through a third bolt (10) and a fourth bolt (33), sliding key grooves are formed in the inner wall of the lower sheath (11) and the inner wall of the middle sheath (15), the lower end of the outer wall of the middle sheath (15) is fixedly connected with a first guide flat key (13) through an eleventh bolt (12), and a sliding pair is formed by the outer wall of the middle sheath (15) and the sliding key groove in the inner wall of the lower sheath (11) through the first guide flat key (13).

6. The spiral elevator suitable for small-space large-stroke rapid lifting and lowering according to claim 5, wherein the lower end of the outer wall of the upper jacket (18) is fixedly connected with a second guiding flat key (26) through a twelfth bolt (27), the upper jacket (18) and the middle jacket (15) form a sliding pair through the second guiding flat key (26), and the top of the upper jacket (18) is fixedly connected with the upper seat (24) through a fifth bolt (19) and a sixth bolt (23); the upper end of the lower sheath (11) is fixedly connected with a lower check ring (14) through a ninth bolt (28), and the upper end of the middle sheath (15) is fixedly connected with an upper check ring (17) through a tenth bolt (16).