CN110844824A - N-stage electric telescopic device with large telescopic ratio and application thereof - Google Patents
N-stage electric telescopic device with large telescopic ratio and application thereof Download PDFInfo
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- CN110844824A CN110844824A CN201911120134.6A CN201911120134A CN110844824A CN 110844824 A CN110844824 A CN 110844824A CN 201911120134 A CN201911120134 A CN 201911120134A CN 110844824 A CN110844824 A CN 110844824A
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- telescopic
- transmission
- limiting
- telescopic mechanism
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
- B66F9/063—Automatically guided
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
- B66F3/08—Devices, e.g. jacks, adapted for uninterrupted lifting of loads screw operated
- B66F3/10—Devices, e.g. jacks, adapted for uninterrupted lifting of loads screw operated with telescopic sleeves
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F13/00—Common constructional features or accessories
Abstract
The invention discloses an N-stage electric telescopic device with a large telescopic ratio and application thereof, and relates to the technical field of mechanical telescopic equipment. The invention comprises a supporting base, a transmission telescopic mechanism and a limit telescopic mechanism; the transmission telescopic mechanism comprises a plurality of transmission telescopic units; the limiting telescopic mechanism comprises a plurality of limiting telescopic units; the transmission telescopic units are connected through threads; the limiting telescopic units are in sliding fit; a transmission telescopic unit at the bottommost part of the transmission telescopic mechanism and a limiting telescopic unit at the bottommost part of the limiting telescopic mechanism are fixed on one surface of the supporting base; the shell and the output shaft of the motor are respectively and fixedly connected with the transmission telescopic unit or the limiting telescopic unit. The invention solves the problem of small expansion ratio in the prior art by the functions of the supporting base, the transmission expansion mechanism and the limit expansion mechanism, and has the requirement of meeting the requirement of large expansion ratio in hoisting equipment and construction equipment.
Description
Technical Field
The invention belongs to the technical field of mechanical telescopic equipment, and particularly relates to an N-level electric telescopic device with a large telescopic ratio, which is applied to hoisting equipment and construction equipment and requires the large telescopic ratio.
Background
At present, the existing telescopic device can be used in equipment which needs to be subjected to telescopic functions, such as an electric push rod, a lifting platform, a lifting antenna, a scissor lift, hoisting equipment and the like.
However, the conventional telescopic device, such as an electric push rod, is composed of a driving motor, a reduction gear, a screw, a nut, a guide sleeve, a push rod, a slide seat, a spring, a shell, a turbine, a micro-motion control switch and the like; the telescopic length is mainly determined by the length of the push rod; the stretch ratio generally refers to: the ratio of its maximum length when extended to its minimum length when shortened; so that the shortest one of the electric push rod and the shell is at least one of the push rod and the shell; the longest is the sum of the push rod and the shell; the expansion ratio of the electric putter does not exceed 2.
For example, the scissor lift is a height difference generated by the crossed state of scissor arms, so that the lifting function is achieved; but the expansion ratio is generally set to be about 3-5 due to the stress condition and the length setting factor of the shear arm.
The N-level electric telescopic device with large telescopic ratio can be applied to hoisting equipment and building equipment which need large telescopic ratio; by the action of the supporting base, the transmission telescopic mechanism and the limiting telescopic mechanism, an infinite telescopic ratio can be realized theoretically; in practical application, however, due to the influence of factors such as bearing strength and cost of components, infinite expansion ratio cannot be achieved, but relatively large expansion ratio can be achieved; the large expansion ratio is expressed as follows: the transmission telescopic mechanism comprises N transmission telescopic units; the limiting telescopic mechanism comprises N limiting telescopic units; the wall thickness of each transmission telescopic unit and each limit telescopic unit is relatively thin as much as possible on the premise of reaching certain strength; the number of the transmission telescopic units and the number of the limit telescopic units which can be arranged in the diameter range of a certain length are as large as possible; therefore, the telescopic height has a certain proportional relation with the number of the transmission telescopic units and the limit telescopic units; theoretically, the wall thickness can be set to be extremely small without being limited by the diameter, but in practical application, the wall thickness must reach a certain width, and the setting of the width is related to the factors such as the existing materials, the strength of the components, the manufacturing cost and the like.
Disclosure of Invention
The invention aims to provide an N-stage electric telescopic device with a large telescopic ratio, wherein the number of transmission telescopic units and limit telescopic units which can be arranged is as large as possible within a diameter range of a certain length under the action of a supporting base, a transmission telescopic mechanism and a limit telescopic mechanism; therefore, the telescopic ratio is theoretically infinite, the telescopic ratio is relatively large in practical application, the telescopic ratio can be improved along with the existing materials and the manufacturing process, the telescopic ratio can be increased along with the corresponding increase in practice, the problem that the telescopic ratio is small in the prior art is solved, and the requirement of large telescopic ratio in hoisting equipment and building equipment is met.
In order to solve the technical problems, the invention is realized by the following technical scheme:
the invention relates to an N-stage electric telescopic device with a large telescopic ratio, which comprises a supporting base, a transmission telescopic mechanism and a limiting telescopic mechanism; the transmission telescopic mechanism comprises a plurality of transmission telescopic units; the transmission telescopic units are all circular structures provided with internal threads or are all circular structures provided with external threads; the plurality of transmission telescopic units are arrayed from inner rings to outer rings in sequence; the transmission telescopic units are connected through threads;
when the transmission telescopic units are all circular ring structures provided with internal threads; the upper part or the lower part of the peripheral side surface of the transmission telescopic unit is provided with a sliding block A matched with the internal thread;
when the transmission telescopic units are all circular ring structures provided with external threads; the upper part or the lower part of the inner side surface of the transmission telescopic unit is provided with a sliding block B matched with the external thread;
the sliding block A and the sliding block B have the same structural characteristics; the internal thread and the external thread are both threads with closed two ends, namely when the sliding block A is in threaded fit with the internal thread, the maximum height difference of the sliding block A in the internal thread is the height difference of the two ends of the internal thread; similarly, the maximum height difference of the sliding block B sliding on the external thread is the height difference of two ends of the external thread;
the limiting telescopic mechanism comprises a plurality of limiting telescopic units; the limiting telescopic units are all of non-rotatable annular structures; the plurality of limiting telescopic units are arrayed from inner rings to outer rings in sequence; the upper part and the lower part of the limiting telescopic unit are respectively provided with a limiting ring A and a limiting ring B which are matched with each other; the limiting rings B between the limiting rings A are in sliding fit among the limiting telescopic units;
a transmission telescopic unit at the bottommost part of the transmission telescopic mechanism and a limiting telescopic unit at the bottommost part of the limiting telescopic mechanism are fixed on one surface of the supporting base;
the position relation between the transmission telescopic mechanism and the limiting telescopic mechanism is as follows: the inner surface of the innermost transmission telescopic unit in the transmission telescopic mechanism is matched with the outer surface of the outermost limit telescopic unit in the limit telescopic mechanism, and the matching can be sliding fit or clearance fit; at the moment, the inner surface of the innermost transmission telescopic unit is fixed with a shell of a motor; the inner surface of the innermost limiting telescopic unit in the limiting telescopic mechanism is fixedly connected with an output shaft of the motor;
the other position relationship between the transmission telescopic mechanism and the limiting telescopic mechanism is as follows: the outer surface of one transmission telescopic unit at the outermost ring in the transmission telescopic mechanism is matched with the inner surface of one limiting telescopic unit at the innermost ring in the limiting telescopic mechanism, and the matching can be sliding fit or clearance fit; at the moment, the inner surface of the innermost limit telescopic unit is fixed with a shell of a motor; the inner surface of the innermost transmission telescopic unit in the transmission telescopic mechanism is fixedly connected with an output shaft of the motor;
the limiting telescopic mechanism has the following functions: the rotation of the shell or the output shaft of the motor is limited even if the shell or the output shaft cannot rotate, so that the transmission telescopic unit in the transmission telescopic mechanism is telescopic through threaded fit; meanwhile, the limiting telescopic unit in the limiting telescopic mechanism can also stretch along with the stretching of the transmission telescopic unit in the transmission telescopic mechanism.
Furthermore, the limit telescopic units are all rectangular ring structures or triangular ring structures; the cross section of the limiting telescopic unit is of two opposite B-shaped structures.
Further, the shell of the motor and the supporting base are respectively fixed at two ends of the telescopic piece which needs to be telescopic.
Further, when the position relation of the transmission telescopic mechanism and the limit telescopic mechanism is as follows: when the inner surface of the transmission telescopic mechanism is matched with the outer surface of the limit telescopic mechanism; the upper part of one transmission telescopic unit in the transmission telescopic mechanism and the support base can also be respectively fixed at two ends of a telescopic piece needing to be telescopic;
when the position relation of the transmission telescopic mechanism and the limiting telescopic mechanism is as follows: when the outer surface of the transmission telescopic mechanism is matched with the inner surface of the limit telescopic mechanism; the upper part of one of the limiting telescopic units in the limiting telescopic mechanism and the supporting base can also be respectively fixed at two ends of a telescopic piece needing to be telescopic.
Furthermore, the N-level electric telescopic device can be applied to a lifting platform with a large telescopic ratio in hoisting equipment.
Furthermore, the N-level electric telescopic device can be applied to telescopic arms for high-altitude operation in building equipment.
Further, the N-stage electric telescopic device can be applied to telescopic equipment needing large telescopic ratio in mechanical equipment.
Furthermore, the top ends of the external threads or the internal threads formed on the transmission telescopic unit are provided with locking pieces; the locking piece is used for locking the locking piece when the thread slides to the top end of the external thread or the internal thread; the locking piece can adopt an electromagnetic lock, an electromagnetic lock and the like; when the electric telescopic device is prevented from extending to the longest state, the electric telescopic device rotates under the action of other factors;
of course, the motor with the locking function can also be used.
The invention discloses an N-stage electric telescopic device with a large telescopic ratio, which has the specific technical principle that:
the working principle is as follows: the shell and the output shaft of the motor are respectively arranged on the transmission telescopic mechanism and the limiting telescopic mechanism, so that the limiting telescopic unit and the transmission telescopic unit can rotate relatively; the limit telescopic unit and the transmission telescopic unit which are positioned at the bottom, namely fixed on the supporting base, can not rotate; the transmission telescopic unit can be matched with the screw thread along with rotation to ascend or descend, the limit telescopic unit can slide up and down and cannot rotate, the transmission telescopic unit can rotate, the height is enabled to change in a single direction through threaded connection under the condition of rotation, and the height is changed in an opposite direction if the rotation direction is opposite; wherein, if the shell is required to rotate, an outer rotor motor is adopted.
The N-level electric expansion is realized theoretically: theoretically, the wall thickness of each limit telescopic unit and each transmission telescopic unit is set to be close to zero, so that the maximum diameter of the N-stage electric telescopic device is only 1cm, the maximum extension length theoretically reaches 10m and 1000m, and even the maximum extension length can be infinitely extended;
the height of each limit telescopic unit and each transmission telescopic unit only influences the number of the required limit telescopic units and transmission telescopic units when the height reaches a fixed value; theoretically, the length of the maximum elongation is independent of the height of the maximum elongation, but a certain direct proportional relationship also exists in practical application;
the realization N level electric expansion in practical application: in practice, the thickness of the wall thickness of each limit telescopic unit and each transmission telescopic unit is influenced by factors such as the weight to be born, the stress state and the like; the wall thickness of the steel plate is generally required to be 1mm-10mm, even more than 10mm, so that the lowest strength requirement of equipment use can be met; the wall thickness of the limiting telescopic unit can be slightly thinner than that of the transmission telescopic unit, and the force state of the limiting telescopic unit is larger than that of the transmission telescopic unit; for example, the outer diameter of the N-stage electric expansion/contraction is set to 1 m; the thickness of each limiting telescopic unit and each transmission telescopic unit is 1 cm; the number of the transmission telescopic units is less than 25, and if the height of the transmission telescopic units is h, the length of the maximum extension is less than and close to 25h, and the length of the minimum shortening is h plus the thickness of the support base; and as for the number and the height of the limiting telescopic units, corresponding parameter setting can be made according to the data of the transmission telescopic units.
Even though the expansion ratio in practical application cannot be infinite, the expansion ratio of the N-stage electric expansion device has great advantages compared with the expansion ratio of the expansion device in the prior art.
The invention has the following beneficial effects:
according to the invention, through the functions of the supporting base, the transmission telescopic mechanism and the limiting telescopic mechanism, when the N-stage electric telescopic device reaches the same maximum extension height, the minimum extension height can be much lower than that of the existing telescopic device, namely, the N-stage electric telescopic device has great advantages in telescopic ratio compared with the existing telescopic device; and the N-level electric telescopic device can reach higher lifting height or extension length and the like in a relatively height-limited environment compared with the conventional telescopic device.
Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural view of an N-stage electric telescopic device with a large telescopic ratio in a maximum extension state according to the present invention;
FIG. 2 is a schematic view of the internal structure of FIG. 1;
FIG. 3 is a schematic structural view of the N-stage electric telescopic device with large telescopic ratio in the minimum shortened state according to the present invention;
FIG. 4 is a schematic view of the internal structure of FIG. 3;
FIG. 5 is a schematic structural view of an N-stage electric telescopic device with a large telescopic ratio in the longest process according to the present invention;
FIG. 6 is a schematic view of the internal structure of FIG. 5;
FIG. 7 is a schematic structural view of a limit telescopic unit;
FIG. 8 is a schematic view of the internal structure of FIG. 7;
FIG. 9 is a schematic structural view of a motor and a limit telescopic unit;
FIG. 10 is a schematic structural diagram of a slider A;
FIG. 11 is a front view of the structure of FIG. 10;
FIG. 12 is a schematic structural view of the transmission telescopic unit with external threads and the sliding block B;
FIG. 13 is a schematic structural view of the transmission telescopic unit with internal threads and the sliding block A;
in the drawings, the components represented by the respective reference numerals are listed below:
1-supporting base, 2-transmission telescopic unit, 3-limit telescopic unit, 4-motor, 201-internal thread, 202-sliding block A, 203-external thread, 204-sliding block B, 301-limit ring A, 302-limit ring B, 401-shell and 402-output shaft.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-13, the present invention is an N-stage electric telescopic device with large telescopic ratio, which comprises a supporting base 1, a transmission telescopic mechanism and a limit telescopic mechanism; wherein, the transmission telescopic mechanism comprises three transmission telescopic units 2; the transmission telescopic units 2 are all circular structures provided with internal threads or the transmission telescopic units 2 are all circular structures provided with external threads; the three transmission telescopic units 2 are arrayed from the inner ring to the outer ring in sequence; the three transmission telescopic units 2 are connected through threads;
when the transmission telescopic units 2 are all circular ring structures provided with internal threads 201; the upper part or the lower part of the peripheral side surface of the transmission telescopic unit 2 is provided with a sliding block A202 matched with the internal thread 201;
when the transmission telescopic units 2 are all circular ring structures provided with external threads 203; the upper part or the lower part of the inner side surface of the transmission telescopic unit 2 is provided with a sliding block B204 matched with the external thread 203;
slider A202 has the same structural characteristics as slider B204; the internal thread 201 and the external thread 203 are both threads with closed two ends, that is, when the sliding block a202 is in threaded fit with the internal thread 201, the maximum height difference of the sliding block a202 sliding in the internal thread 201 is the height difference of the two ends of the internal thread 201; similarly, the maximum height difference of the sliding block B204 sliding on the external thread 203 is the height difference of the two ends of the external thread 203;
the limiting telescopic mechanism comprises four limiting telescopic units 3; the limiting telescopic units 3 are all of non-rotatable annular structures; the four limit telescopic units 3 are arrayed from the inner ring to the outer ring in sequence; the upper part and the lower part of the limiting telescopic unit 3 are respectively provided with a limiting ring A301 and a limiting ring B302 which are matched with each other; the four limit telescopic units 3 are in sliding fit between the limit rings A301 and the limit rings B302;
a transmission telescopic unit 2 at the bottommost part of the transmission telescopic mechanism and a limiting telescopic unit 3 at the bottommost part of the limiting telescopic mechanism are fixed on one surface of the supporting base 1;
one of the position relations between the transmission telescopic mechanism and the limiting telescopic mechanism is as follows: the inner surface of the innermost transmission telescopic unit 2 in the transmission telescopic mechanism is matched with the outer surface of the outermost limit telescopic unit 3 in the limit telescopic mechanism, and the matching can be sliding fit or clearance fit; at this time, the inner surface of the innermost transmission telescopic unit 2 is fixed with a shell 401 of the motor 4; the inner surface of the innermost limiting telescopic unit 3 in the limiting telescopic mechanism is fixedly connected with an output shaft 402 of the motor 4;
the other position relation of the transmission telescopic mechanism and the limiting telescopic mechanism is as follows: the outer surface of one transmission telescopic unit 2 at the outermost ring in the transmission telescopic mechanism is matched with the inner surface of one limiting telescopic unit 3 at the innermost ring in the limiting telescopic mechanism, and the matching can be sliding fit or clearance fit; at this time, the inner surface of the innermost limit telescopic unit 3 is fixed with a shell 401 of the motor 4; the inner surface of the innermost transmission telescopic unit 2 in the transmission telescopic mechanism is fixedly connected with an output shaft 402 of the motor 4;
the spacing telescopic machanism's effect is: the rotation of the housing 401 or the output shaft 402 of the motor 4 is restricted even if it cannot rotate, so that the transmission telescopic unit 2 in the transmission telescopic mechanism is telescopic by screw-fitting; meanwhile, the limit telescopic unit 3 in the limit telescopic mechanism can also stretch and retract along with the stretching and retracting of the transmission telescopic unit 2 in the transmission telescopic mechanism.
Preferably, the limit telescopic units 3 are all rectangular ring structures or triangular ring structures; the cross section of the limiting telescopic unit 3 is of two opposite B-shaped structures.
Preferably, the housing 401 of the motor 4 and the supporting base 1 are fixed at two ends of a telescopic member to be telescopic, respectively.
Preferably, when the position relation of the transmission telescopic mechanism and the limit telescopic mechanism is as follows: when the inner surface of the transmission telescopic mechanism is matched with the outer surface of the limit telescopic mechanism; the upper part of one transmission telescopic unit 2 in the transmission telescopic mechanism and the support base 1 can also be respectively fixed at two ends of a telescopic piece needing to be telescopic;
when the position relation of the transmission telescopic mechanism and the limiting telescopic mechanism is as follows: when the outer surface of the transmission telescopic mechanism is matched with the inner surface of the limit telescopic mechanism; the upper part of one of the limiting telescopic units 3 in the limiting telescopic mechanism and the supporting base 1 can also be respectively fixed at two ends of a telescopic piece needing to be telescopic.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (7)
1. The utility model provides a big concertina ratio's N level electric telescopic device which characterized in that: comprises a supporting base (1), a transmission telescopic mechanism and a limit telescopic mechanism;
wherein, the transmission telescopic mechanism comprises a plurality of transmission telescopic units (2); the transmission telescopic units (2) are all circular structures provided with internal threads or the transmission telescopic units (2) are all circular structures provided with external threads; the plurality of transmission telescopic units (2) are arrayed from the inner ring to the outer ring in sequence; the transmission telescopic units (2) are connected through threads;
when the transmission telescopic units (2) are all circular ring structures provided with internal threads (201); the upper part or the lower part of the peripheral side surface of the transmission telescopic unit (2) is provided with a sliding block A (202) matched with the internal thread (201);
when the transmission telescopic units (2) are all circular ring structures provided with external threads (203); the upper part or the lower part of the inner side surface of the transmission telescopic unit (2) is provided with a sliding block B (204) matched with the external thread (203);
the structural characteristics of the sliding block A (202) and the sliding block B (204) are the same; the internal thread (201) and the external thread (203) are both threads with two closed ends, namely when the sliding block A (202) is in threaded fit with the internal thread (201), the maximum height difference of the sliding block A (202) in the internal thread (201) is the height difference of the two ends of the internal thread (201); the maximum height difference of the sliding block B (204) sliding on the external thread (203) is the height difference of two ends of the external thread (203);
the limiting telescopic mechanism comprises a plurality of limiting telescopic units (3); the limiting telescopic units (3) are all of non-rotatable annular structures; the plurality of limiting telescopic units (3) are arrayed from the inner ring to the outer ring in sequence; the upper part and the lower part of the limiting telescopic unit (3) are respectively provided with a limiting ring A (301) and a limiting ring B (302) which are matched with each other; the limiting telescopic units (3) are in sliding fit with the limiting rings B (302) among the limiting rings A (301);
a transmission telescopic unit (2) at the bottommost part of the transmission telescopic mechanism and a limiting telescopic unit (3) at the bottommost part of the limiting telescopic mechanism are fixed on one surface of the supporting base (1);
the position relation between the transmission telescopic mechanism and the limiting telescopic mechanism is as follows: the inner surface of one transmission telescopic unit (2) at the innermost circle in the transmission telescopic mechanism is matched with the outer surface of one limiting telescopic unit (3) at the outermost circle in the limiting telescopic mechanism; at the moment, the inner surface of the innermost transmission telescopic unit (2) is fixed with a shell of a motor (4); the inner surface of the innermost limiting telescopic unit (3) in the limiting telescopic mechanism is fixedly connected with the output shaft of the motor (4);
the other position relationship between the transmission telescopic mechanism and the limiting telescopic mechanism is as follows: the outer surface of one transmission telescopic unit (2) at the outermost ring in the transmission telescopic mechanism is matched with the inner surface of one limiting telescopic unit (3) at the innermost ring in the limiting telescopic mechanism, and at the moment, the inner surface of one limiting telescopic unit (3) at the innermost ring is fixedly provided with a shell of a motor (4); the inner surface of the innermost transmission telescopic unit (2) in the transmission telescopic mechanism is fixedly connected with the output shaft of the motor (4).
2. The high-expansion-ratio N-stage electric expansion device according to claim 1, wherein the limit expansion units (3) are all rectangular ring structures or triangular ring structures; the cross section of the limiting telescopic unit (3) is of two opposite B-shaped structures.
3. The high-expansion-ratio N-stage electric expansion device according to claim 1, wherein the housing of the motor (4) and the supporting base (1) are fixed at two ends of the expansion member to be expanded.
4. An N-stage electric telescopic device with large telescopic ratio according to claim 1,
when the position relation of the transmission telescopic mechanism and the limiting telescopic mechanism is as follows: when the inner surface of the transmission telescopic mechanism is matched with the outer surface of the limit telescopic mechanism; the upper part of one transmission telescopic unit (2) in the transmission telescopic mechanism and the support base (1) can also be respectively fixed at two ends of a telescopic piece needing to be telescopic;
when the position relation of the transmission telescopic mechanism and the limiting telescopic mechanism is as follows: when the outer surface of the transmission telescopic mechanism is matched with the inner surface of the limit telescopic mechanism; the upper part of one limiting telescopic unit (3) in the limiting telescopic mechanism and the supporting base (1) can also be respectively fixed at two ends of a telescopic piece needing to be telescopic.
5. The application of the N-stage electric telescopic device with high telescopic ratio as claimed in any one of claims 1 to 4, wherein the N-stage electric telescopic device can be applied to a lifting platform with high telescopic ratio in hoisting equipment.
6. The use of an N-stage electric telescopic device with large telescopic ratio as claimed in any one of claims 1 to 4, wherein the N-stage electric telescopic device can be used for telescopic arms for high-altitude operation in construction equipment.
7. The use of an N-stage electric telescopic device with large telescopic ratio as claimed in any one of claims 1 to 4, wherein the N-stage electric telescopic device can be used in telescopic equipment requiring large telescopic ratio in mechanical equipment.
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| CN201911120134.6A CN110844824A (en) | 2019-11-15 | 2019-11-15 | N-stage electric telescopic device with large telescopic ratio and application thereof |
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| CN113294014A (en) * | 2021-05-28 | 2021-08-24 | 李军 | Telescopic device |
| WO2022200109A1 (en) * | 2021-03-25 | 2022-09-29 | Sew-Eurodrive Gmbh & Co. Kg | Lifting device and transport vehicle |
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| CN207259064U (en) * | 2017-10-14 | 2018-04-20 | 深圳市精艺佳科技发展有限公司 | More piece helix tube type motor-driven jack |
| CN209193422U (en) * | 2018-08-30 | 2019-08-02 | 云南交投市政园林工程有限公司 | Telescopic arm with Auxiliary support beam |
| CN209177916U (en) * | 2018-11-30 | 2019-07-30 | 嘉兴金鹏工具有限公司 | A kind of Multi-section retractable jack |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022200109A1 (en) * | 2021-03-25 | 2022-09-29 | Sew-Eurodrive Gmbh & Co. Kg | Lifting device and transport vehicle |
| CN113294014A (en) * | 2021-05-28 | 2021-08-24 | 李军 | Telescopic device |
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