CN212022898U - Foldable automatic telescopic mast system - Google Patents
Foldable automatic telescopic mast system Download PDFInfo
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- CN212022898U CN212022898U CN202020654187.8U CN202020654187U CN212022898U CN 212022898 U CN212022898 U CN 212022898U CN 202020654187 U CN202020654187 U CN 202020654187U CN 212022898 U CN212022898 U CN 212022898U
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Abstract
The utility model relates to a foldable automatic telescopic mast system, which comprises a mast body, the lower end of which is hinged on a ship body and can be in a vertical state or a falling state through swinging, wherein the mast body comprises a plurality of sections of mast sections, the diameters of which are gradually decreased from bottom to top, and the upper and lower adjacent sections of mast sections are sleeved together and can relatively slide to realize the telescopic effect; the ship body is provided with a plurality of winches distributed around the mast body, the towline of each winch is connected to the top of the mast body, and the two winches are respectively positioned on two sides of the mast body in the swinging direction; the utility model has the advantages of adjustable overall height of the foldable automatic telescopic mast system, foldable falling, greatly reduced passing height of the ship, increased passing ability, strong practicability, convenient use and easy operation; the mast system can be folded after being retracted, so that the occupied space is reduced, and the size of the placing platform is greatly reduced.
Description
Technical Field
The utility model relates to a folding automatic flexible mast system.
Background
The masts are used for installing navigation lights, signal flags, illuminating lamps, steam whistle and other equipment, most ships only have bow masts, and a small part of ships have stern masts, but the stern masts are low in height and single in function, the ship traffic capacity is affected due to the fact that the bow masts are high in height, the wind area is increased, and the maintenance difficulty is high.
Most of existing masts are fixed, the height of the masts has certain requirements and is high, and the traffic capacity of ships is influenced when the ships travel in limited-height riverways and sea channels; in addition, as a plurality of steel structures are required to be additionally arranged on signal lamps, navigation lamps, electronic instruments, signal flags, air whistle and the like arranged on the mast, the wind area is increased, and the stability of the ship is influenced; this increases the difficulty of maintenance due to the high mast height.
The existing technology also has a reversible mast, which is divided into manual operation and hydraulic cylinder operation, the rotating mechanism is a hinge mechanism arranged at the bottom of the mast, the mast is supported or put down around a hinge shaft through a manual or oil cylinder, the manual operation type generally appears on small ships, while ships with larger body sizes must use hydraulic pressure, because the whole weight of the mast is very heavy, the manual operation has certain safety risk and can be completed by a plurality of persons; the reversible mast driven by the hydraulic oil cylinder solves the problems of safety and labor waste, but needs a large placing platform, and the space of the driving platform is limited, so that the driving platform is possibly increased, the wind area of the ship is increased, the stability of the ship is influenced, and the outfitting number is increased, so that the specifications of anchor chains, anchors and mooring equipment are increased.
There are also telescopic masts in the prior art, such as a marine telescopic mast (patent No. 200810061615. X), which is provided with a telescopic driving mechanism in mast sections to move the mast sections up and down to realize telescopic action. However, the telescopic mechanisms of the masts occupy a large amount of space in mast sections, the actual telescopic space is affected, and the masts cannot be installed and maintained, and are not mechanically limited and reinforced, only the hydraulic system is limited, if the hydraulic system fails, the masts retract downwards under the action of gravity, so that the safety of ships and personnel is seriously affected, and meanwhile, due to the safety problem, the masts are not dared to arrange personnel to maintain in an extending state.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing an overall height-adjustable to collapsible folding automatic telescopic mast system who falls, greatly reduced the current height of boats and ships, increased trafficability characteristic, reduce occupation space.
The utility model discloses a following scheme realizes: a foldable automatic telescopic mast system comprises a mast body, the lower end of which is hinged on a ship body and can be in a vertical state or a laid-down state through swinging, wherein the mast body comprises a plurality of sections of mast sections, the diameters of which are gradually reduced from bottom to top, and two sections of mast sections which are adjacent from top to bottom are sleeved together and can relatively slide to realize the telescopic effect; the ship body is provided with a plurality of winches distributed around the mast body, the tow cables of the winches are connected to the top of the mast body, and the two winches are respectively positioned on two sides of the mast body in the swinging direction.
Furthermore, a universal cable guide device for guiding a towing cable is arranged on one side, facing the mast body, of each winch on the ship body; a base used for hinging the lower end of the mast body is fixedly arranged on the ship body; the ship body is also provided with a support frame for supporting the laid mast body, and the support frame is positioned on one side of the mast body in the swinging direction.
Furthermore, the base lateral part is provided with a hydraulic anti-swing lock which is used for limiting the mast body to swing when swinging to the vertical state, the hydraulic anti-swing lock comprises an anti-swing hydraulic cylinder, the end part of a telescopic rod of the anti-swing hydraulic cylinder is coaxially connected with an anti-swing locking bolt which is used for penetrating through the base side plate and the mast body, and anti-swing locking holes which can be aligned when the mast body swings to the vertical state and are used for the anti-swing locking bolt to penetrate through are formed in the lower end of the mast body and the base side plate.
Furthermore, a telescopic oil cylinder used for driving the two sections of mast sections to stretch is connected between the upper and lower adjacent sections of mast sections, a cross rod is fixedly connected to the upper end of each section of mast section, and a telescopic limit supporting device is connected between the cross rods of the upper and lower adjacent sections of mast sections.
Furthermore, the limiting and supporting device comprises an upper limiting rod and a lower limiting rod which are hinged into a chain shape, the upper end of the upper limiting rod is hinged on the transverse rod above, and the lower end of the lower limiting rod is hinged on the transverse rod below; the inward side of the upper end part of the lower limiting rod is fixedly connected with a furling limiting block which is used for propping against the inward side of the lower end of the upper limiting rod so as to limit furling angles of the upper limiting rod and the lower limiting rod.
The upper end of the telescopic oil cylinder is hinged to the side part of the mast section above, and the lower end of the telescopic oil cylinder is hinged to the side part of the mast section below; and the hydraulic pump station is connected with the telescopic oil cylinder through an oil supply pipeline.
Furthermore, the upper end side part of the mast section below the two sections of mast sections adjacent to each other is provided with a hydraulic anti-shrinkage lock for limiting the relative sliding of the two sections of mast sections when the two sections of mast sections extend, the hydraulic anti-shrinkage lock comprises an anti-shrinkage hydraulic cylinder, the end part of a telescopic rod of the anti-shrinkage hydraulic cylinder is coaxially connected with an anti-shrinkage locking bolt for penetrating through the sleeving part of the two sections of mast sections, and the sleeving part of the two sections of mast sections is provided with an anti-shrinkage locking hole which can be aligned after the two sections of mast sections extend in place and through which the anti-shrinkage locking bolt can penetrate.
The mast is characterized by further comprising a telescopic maintenance ladder positioned beside the mast body, wherein the telescopic maintenance ladder comprises a plurality of ladders with the width gradually decreasing from bottom to top, two adjacent ladders are connected together and can slide relatively to realize the telescopic maintenance, the number of the ladder sections of the telescopic maintenance ladder is the same as that of the mast sections of the mast body, and all the ladder sections of the telescopic maintenance ladder are fixedly connected to the mast sections of the corresponding sections of the mast body.
Compared with the prior art, the utility model discloses following beneficial effect has: the utility model has the advantages of adjustable overall height of the foldable automatic telescopic mast system, foldable falling, greatly reduced passing height of the ship, increased passing ability, strong practicability, convenient use and easy operation; the mast system can be folded after being retracted, so that the occupied space is reduced, and the size of the placing platform is greatly reduced.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to specific embodiments and related drawings.
Drawings
FIG. 1 is a schematic view of an extended state of a mast system according to an embodiment of the present invention;
FIG. 2 is a left side view of FIG. 1;
fig. 3 is a schematic diagram of a shortening state of a mast system according to an embodiment of the present invention;
FIG. 4 is an enlarged view taken at point I in FIG. 3;
fig. 5 is a schematic view of a mast system according to an embodiment of the present invention in a laid-down state;
the reference numbers in the figures illustrate: 100-mast body, 110-mast section, 120-cross bar, 200-telescopic oil cylinder, 300-limit supporting device, 310-upper limit bar, 320-lower limit bar, 330-furling limit block, 400-hydraulic pump station, 500-telescopic maintenance ladder, 600-winch, 610-tow rope, 700-hydraulic anti-shrinkage lock, 800-base, 810-articulated shaft, 900-universal cable guider, 1000-support frame and 1100-hydraulic anti-sway lock.
Detailed Description
As shown in fig. 1 to 5, a foldable automatic telescopic mast system comprises a mast body 100 whose lower end is hinged to a hull and can be swung to be in an upright state or a laid-down state, wherein the mast body 100 comprises a plurality of mast sections 110 with diameters decreasing from bottom to top, and two adjacent sections of mast sections are sleeved together and can slide relatively to realize telescopic movement; a plurality of winches 600 distributed around the mast body 100 are arranged on the ship body, a tow cable 510 of each winch 600 is connected to the top of the mast body 100, two winches 600 are respectively positioned at two sides of the mast body in the swinging direction, when the mast body needs to be laid down, the tow cable is slowly released by the winch at one side in the swinging direction of the mast body, the tow cable is slowly retracted by the winch at the other side in the swinging direction of the mast body, so that the mast body slowly swings towards the other side, and when the mast body and the ship body reach a certain included angle, manual auxiliary lifting is added to completely lay down the mast body; when the mast body needs to be erected, the mast body is lifted by manual assistance to swing to a certain angle, and then is pulled to be in an erected state by a winch; the folding function of the mast system is realized by swinging and switching the mast system between a laid-down state and a pile erecting state, and the winch is a main power source for folding the mast system and is also reinforcing equipment of the mast system. The mast system of the utility model has the folding function, thereby greatly reducing the passing height of the ship and increasing the passing ability; the mast system can be folded after being retracted, so that the occupied space is reduced, and the size of the placing platform is greatly reduced.
In this embodiment, the number of the winches is 4, two of the winches are located on two sides of the mast body in the swinging direction, and the other two winches are located on two sides of the mast body in the direction perpendicular to the swinging direction, that is, the winches are staggered by 90 degrees from the two winches located in the swinging direction of the mast body; the winch adopts a winch capable of controlling the tension of the towline, and the tension of the winch is gradually changed along with the change of the angle of the mast so as to ensure the stable and gradual process of the laying process; when the mast system is in a vertical state, the winch increases the tension to a pre-tightening value, so that the mast body is reinforced in four directions, namely front, back, left and right directions, and finally, a mechanical locking function on the winch is started to maintain the pre-tightening force on the towline, so that the strength and the stability of the mast are ensured.
In this embodiment, a universal cable guide 900 for guiding a towing cable is further installed on the hull on the side of each winch 600 facing the mast body; the base 800 is fixedly arranged on the ship body and used for hinging the lower end of the mast body, the base consists of a bottom plate fixedly connected to the ship body and side plates which are positioned on two sides above the bottom plate and are vertical to the bottom plate, and the longitudinal section of the base is U-shaped; the hull is also provided with a support frame 1000 for supporting the laid mast body, and the support frame 100 is positioned on one side of the mast body in the swinging direction; the universal cable guide is used for guiding the towline, and the towline angles of the two winches staggered by 90 degrees from the swinging direction of the mast body are changed along with the extension or retraction of the mast, so that the towline coming out of the winches can meet the requirements of different angle directions.
In this embodiment, a hydraulic anti-sway lock 1100 for limiting sway of the mast body when the mast body is swung to an upright state is disposed on the side of the base, the hydraulic anti-sway lock 1100 includes an anti-sway hydraulic cylinder, an anti-sway lock bolt for passing through the base side plate and the mast body is coaxially connected to an end of a telescopic rod of the anti-sway hydraulic cylinder, and anti-sway lock holes capable of aligning and allowing the anti-sway lock bolt to pass through when the mast body is swung to the upright state are disposed on the lower end of the mast body and the base side plate; the lower end of the mast body is hinged to a side plate of the base through a hinge shaft, the upper part of the side part is provided with a hinge hole for hinge, the anti-shaking locking hole is positioned right below the hinge hole, the anti-shaking locking hole on the mast body is positioned at the lower end of the mast body, and the lower end of the mast body is provided with a through hole for the hinge shaft to pass through at the upper end of the anti-shaking locking hole; when the mast body swings to the vertical state, the anti-swing locking hole in the mast body is just aligned with the anti-swing locking hole in the base, then the hydraulic anti-swing lock 1100 works, the anti-swing locking bolt penetrates through the anti-swing locking hole, the mast body is limited to swing, and the stability of a mast system is guaranteed.
The folding automatic telescopic mast system comprises the following steps: when the ship is laid down, the winch on the same side of the mast body with the support frame in the swinging direction slowly retracts the tow rope, the winch on the other side of the mast body in the swinging direction slowly releases the tow rope, so that the mast body slowly swings towards the side of the support frame, and when the mast body and the ship body reach a certain included angle, manual assistance is added to lift the ship body so as to completely lay down the ship; when the mast is erected, the mast body is lifted by manual assistance to swing upwards to a certain angle, then the winch on the same side of the mast body with the support frame in the swinging direction slowly releases the tow rope, and the winch on the other side of the mast body in the swinging direction slowly retracts the tow rope to pull the mast body to continuously swing upwards until the mast body reaches the erected state.
In this embodiment, a telescopic cylinder 200 for driving two sections of mast sections to extend and retract is connected between two adjacent sections of mast sections, a telescopic cylinder 200 is arranged between each two adjacent sections of mast sections to drive relative movement between the mast sections, a cross bar 120 is fixedly connected to the upper end of each section of mast section, the cross bar is used for mounting components such as signal lamps, navigation lamps, electronic instruments, signal flags and air fog flutes, a telescopic limit support device 300 is connected between the cross bars of the two adjacent sections of mast sections, and two limit support devices symmetrically distributed on two sides of a mast body are connected between the cross bars of the two adjacent sections of mast sections, and are used for supporting the cross bar when the mast works and limiting the extension and retraction length of the mast so as to ensure the safety and accuracy of system operation; the mast system is adjustable in overall height, the traffic capacity of ships can be guaranteed, the maintenance difficulty is low, and the telescopic oil cylinder for controlling the mast to stretch is arranged outside the mast body, so that the problem of difficulty in maintenance does not exist, the space inside a mast section is not occupied, and the telescopic space of the mast is enlarged.
In this embodiment, the position limiting and supporting device 300 includes an upper position limiting rod 310 and a lower position limiting rod 320 hinged in a chain shape, wherein the upper end of the upper position limiting rod is hinged on the upper cross rod, and the lower end of the lower position limiting rod is hinged on the lower cross rod; a furling limiting block 330 which is used for propping against the inward side of the lower end of the upper limiting rod so as to limit the furling angle of the upper limiting rod and the lower limiting rod is fixedly connected to the inward side of the upper end of the lower limiting rod; hinge lugs for hinging are welded at the two ends of the upper limiting rod 310 and the lower limiting rod 320; the limiting and supporting device 300 is used for limiting the extension and contraction of the mast body, when the upper limiting rod and the lower limiting rod are positioned on the same straight line, the limiting and supporting device 300 is also opened to the longest state, the mast body can be limited to continue to extend, the limiting positions of the upper limiting rod and the lower limiting rod during folding are limited by retracting the limiting blocks, the mast body is also guaranteed to be mechanically supported when being retracted to the limiting positions, the height of the mast is accurately controlled, and meanwhile the structural strength of the mast is also guaranteed.
In this embodiment, the hydraulic power unit 400 is further included, the upper end of the telescopic oil cylinder 200 is hinged to the side part of the mast section above, and the lower end of the telescopic oil cylinder is hinged to the side part of the mast section below; the hydraulic pump station 400 is connected with the telescopic oil cylinder 200 through an oil supply pipeline, and the hydraulic pump station 400 is provided with a control unit.
In this embodiment, the hydraulic lock 700 for limiting the relative sliding between the two mast sections when the two mast sections extend is arranged on the side part of the upper end of the lower mast section of the two mast sections adjacent to each other, the hydraulic anti-shrinkage lock comprises an anti-shrinkage hydraulic cylinder, an anti-shrinkage locking bolt for penetrating through the sleeving part of the two mast sections is coaxially connected to the end part of a telescopic rod of the anti-shrinkage hydraulic cylinder, anti-shrinkage locking holes which can be aligned after the two mast sections extend in place and through which the anti-shrinkage locking bolt can penetrate are formed in the sleeving part of the two mast sections, the anti-shrinkage locking hole on the upper mast section is located at a position close to the lower end, and the anti-shrinkage locking hole on the lower mast section is located at a; the mechanical locking is realized by using the anti-shrinkage locking bolt on the hydraulic anti-shrinkage lock to ensure that the mast is in an extension state without being supported by a telescopic oil cylinder, so that the safety and stability of a mast system are ensured, and the hydraulic system is prevented from losing efficacy and causing the mast to slide.
In this embodiment, the mast maintenance device further comprises a telescopic maintenance ladder 500 located beside the mast body, the telescopic maintenance ladder is a device used for maintaining the mast and the mast above, and changes along with the height change of the mast, the telescopic maintenance ladder is composed of a plurality of sections of ladders with the width gradually decreasing from bottom to top, two adjacent sections of ladders are connected together and can slide relatively to realize telescopic operation, ladder frames at two sides of the two adjacent sections of ladders are connected in a sliding manner, the number of the ladder sections of the telescopic maintenance ladder is the same as that of mast sections of the mast body, and each section of ladder of the telescopic maintenance ladder is fixedly connected to a mast section of a corresponding section of the mast body.
The folding automatic telescopic mast system has the following telescopic process: when the mast needs to be extended, a hydraulic pump station injects hydraulic oil into a working cavity of a telescopic oil cylinder, the telescopic oil cylinder extends to push mast sections to move upwards so that the mast body is gradually extended integrally, the mast body extends to further drive upper and lower limiting rods of a limiting and supporting device to be opened, when the upper limiting rod and the lower limiting rod are positioned on the same straight line, the mast body extends to the position, a hydraulic anti-shrinkage lock is started to fix the position of the mast sections, and the extension state of the mast is locked; when the mast needs to be retracted, the hydraulic pump station releases hydraulic oil in the working cavity of the telescopic oil cylinder, the telescopic oil cylinder retracts to drive the mast section to move upwards so that the mast body is integrally and gradually retracted, the mast retracts to drive the upper limiting rod and the lower limiting rod of the limiting and supporting device to retract, and when the retracting limiting block of the lower limiting rod props against the upper limiting rod, the mast body retracts to the right position and supports the cross rod by the limiting and supporting device.
Any technical solution disclosed in the present invention is, unless otherwise stated, disclosed a numerical range if it is disclosed, and the disclosed numerical range is a preferred numerical range, and any person skilled in the art should understand that: the preferred ranges are merely those values which are obvious or representative of the technical effect which can be achieved. Because numerical value is more, can't be exhaustive, so the utility model discloses just disclose some numerical values with the illustration the technical scheme of the utility model to, the numerical value that the aforesaid was enumerated should not constitute right the utility model discloses create the restriction of protection scope.
The utility model discloses if disclose or related to mutual fixed connection's spare part or structure, then, except that other the note, fixed connection can understand: a detachable fixed connection (for example using bolts or screws) is also understood as: non-detachable fixed connections (e.g. riveting, welding), but of course, fixed connections to each other may also be replaced by one-piece structures (e.g. manufactured integrally using a casting process) (unless it is obviously impossible to use an integral forming process).
In addition, the terms used in any aspect of the present disclosure as described above to indicate positional relationships or shapes include similar, analogous, or approximate states or shapes unless otherwise stated.
The utility model provides an arbitrary part both can be assembled by a plurality of solitary component parts and form, also can be the solitary part that the integrated into one piece technology was made.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same; although the present invention has been described in detail with reference to preferred embodiments, it should be understood by those skilled in the art that: the invention can be modified or equivalent substituted for some technical features; without departing from the spirit of the present invention, it should be understood that the scope of the claims is intended to cover all such modifications and variations.
Claims (8)
1. A foldable automatic telescopic mast system, characterized in that: the mast comprises a mast body, the lower end of which is hinged on a ship body and can be in a vertical state or a laid-down state through swinging, wherein the mast body comprises a plurality of sections of mast sections, the diameters of which are gradually reduced from bottom to top section by section, and two sections of mast sections which are adjacent from top to bottom are sleeved together and can slide relatively to realize extension and retraction; the ship body is provided with a plurality of winches distributed around the mast body, the tow cables of the winches are connected to the top of the mast body, and the two winches are respectively positioned on two sides of the mast body in the swinging direction.
2. The collapsible automated telescoping mast system of claim 1, wherein: the ship body is also provided with a universal cable guide device which is positioned on one side of each winch facing the mast body and used for guiding a hauling cable; a base used for hinging the lower end of the mast body is fixedly arranged on the ship body; the ship body is also provided with a support frame for supporting the laid mast body, and the support frame is positioned on one side of the mast body in the swinging direction.
3. The collapsible automated telescoping mast system of claim 2, wherein: the mast comprises a mast body and is characterized in that a hydraulic anti-swing lock used for limiting the mast body to swing when the mast body swings to a vertical state is arranged on the side portion of the base, the hydraulic anti-swing lock comprises an anti-swing hydraulic cylinder, an anti-swing locking bolt used for penetrating through a base side plate and the mast body is coaxially connected to the end portion of a telescopic rod of the anti-swing hydraulic cylinder, and anti-swing locking holes capable of being aligned when the mast body swings to the vertical state and allowing the anti-swing locking bolt to penetrate through are formed in the lower end of the mast body and the.
4. The collapsible automated telescoping mast system of claim 1, wherein: a telescopic oil cylinder used for driving the two sections of mast sections to stretch is connected between the upper and lower adjacent sections of mast sections, a cross rod is fixedly connected to the upper end of each section of mast section, and a telescopic limiting support device is connected between the cross rods of the upper and lower adjacent sections of mast sections.
5. The collapsible automated telescoping mast system of claim 4, wherein: the limiting support device comprises an upper limiting rod and a lower limiting rod which are hinged into a chain shape, the upper end of the upper limiting rod is hinged to the upper cross rod, and the lower end of the lower limiting rod is hinged to the lower cross rod; the inward side of the upper end part of the lower limiting rod is fixedly connected with a furling limiting block which is used for propping against the inward side of the lower end of the upper limiting rod so as to limit furling angles of the upper limiting rod and the lower limiting rod.
6. The collapsible automated telescoping mast system of claim 5, wherein: the upper end of the telescopic oil cylinder is hinged to the side part of the mast section above, and the lower end of the telescopic oil cylinder is hinged to the side part of the mast section below; and the hydraulic pump station is connected with the telescopic oil cylinder through an oil supply pipeline.
7. A collapsible automated telescopic mast system according to claim 1 or 4, wherein: the upper end side part of the mast section below the two sections of mast sections which are adjacent up and down is provided with a hydraulic anti-shrinkage lock which is used for limiting the relative sliding of the two sections of mast sections when the two sections of mast sections extend, the hydraulic anti-shrinkage lock comprises an anti-shrinkage hydraulic cylinder, the end part of a telescopic rod of the anti-shrinkage hydraulic cylinder is coaxially connected with an anti-shrinkage locking bolt which is used for penetrating through the sleeving part of the two sections of mast sections, and the sleeving part of the two sections of mast sections is provided with an anti-shrinkage locking hole which can be aligned after the two sections of mast sections extend to the right position and.
8. The collapsible automated telescoping mast system of claim 1, wherein: the telescopic maintenance ladder is characterized by further comprising a telescopic maintenance ladder positioned beside the mast body, the telescopic maintenance ladder is composed of a plurality of ladders with the width gradually decreased from bottom to top, two adjacent ladders are connected together and can slide relatively to realize the telescopic maintenance, the number of the ladder sections of the telescopic maintenance ladder is the same as that of mast sections of the mast body, and all the ladder sections of the telescopic maintenance ladder are fixedly connected to mast sections of corresponding sections of the mast body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020654187.8U CN212022898U (en) | 2020-04-26 | 2020-04-26 | Foldable automatic telescopic mast system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020654187.8U CN212022898U (en) | 2020-04-26 | 2020-04-26 | Foldable automatic telescopic mast system |
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| CN212022898U true CN212022898U (en) | 2020-11-27 |
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| CN202020654187.8U Expired - Fee Related CN212022898U (en) | 2020-04-26 | 2020-04-26 | Foldable automatic telescopic mast system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111361686A (en) * | 2020-04-26 | 2020-07-03 | 宁德师范学院 | Foldable automatic telescopic mast system and working method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111361686A (en) * | 2020-04-26 | 2020-07-03 | 宁德师范学院 | Foldable automatic telescopic mast system and working method thereof |
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Granted publication date: 20201127 Termination date: 20210426 |