CN107676318A - Seesaw toy based on true and false piston - Google Patents

Seesaw toy based on true and false piston Download PDF

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Publication number
CN107676318A
CN107676318A CN201711016907.7A CN201711016907A CN107676318A CN 107676318 A CN107676318 A CN 107676318A CN 201711016907 A CN201711016907 A CN 201711016907A CN 107676318 A CN107676318 A CN 107676318A
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CN
China
Prior art keywords
piston
cylinder body
cylinder
piston bar
true
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201711016907.7A
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Chinese (zh)
Other versions
CN107676318B (en
Inventor
孙承峰
孙立宁
张艳华
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Suzhou Danaotiangong Robot Technology Co Ltd
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Suzhou Danaotiangong Robot Technology Co Ltd
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Priority to CN201711016907.7A priority Critical patent/CN107676318B/en
Publication of CN107676318A publication Critical patent/CN107676318A/en
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Publication of CN107676318B publication Critical patent/CN107676318B/en
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/16Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • F15B11/20Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors controlling several interacting or sequentially-operating members
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63GMERRY-GO-ROUNDS; SWINGS; ROCKING-HORSES; CHUTES; SWITCHBACKS; SIMILAR DEVICES FOR PUBLIC AMUSEMENT
    • A63G11/00See-saws
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/30Against vector-borne diseases, e.g. mosquito-borne, fly-borne, tick-borne or waterborne diseases whose impact is exacerbated by climate change

Abstract

The invention discloses a kind of seesaw toy based on true and false piston, including the reciprocating first hydraulic cylinder of output vertical direction and second hydraulic cylinder, dynamic sealing connects and forms true piston between first piston and the first cylinder body wherein in first hydraulic cylinder, and the second piston in second hydraulic cylinder connects the upper chamber of the second cylinder body and lower chambers two form pseudo- piston;The bottom of first cylinder body offers the first liquid flow hole, and the bottom of the second cylinder body offers the second liquid flow hole, passes through fluid flow tube phase liquid flowing connection between the first liquid flow hole and the second liquid flow hole.The seesaw toy is based on true and false piston theory and pascal's principle designs so that can also learn the knowwhy to complexity while children are at play, be a toy taught through lively activities.

Description

Seesaw toy based on true and false piston
Technical field
The present invention relates to a kind of seesaw toy based on true and false piston.
Background technology
Hydraulic cylinder is that a kind of common hydraulic pressure hydraulic energy being changed into mechanical energy, doing straight reciprocating motion performs Element, it has the advantages that simple in construction, reliable operation, stable movement, therefore is obtained extensively in all kinds of mechanical hydraulic systems General application.Hydraulic cylinder is mainly made up of cylinder barrel, piston and piston rod, and relative motion between the two is driven by hydraulic pressure. Mating relation between piston, piston rod and cylinder barrel is then related to the change of hydraulic cylinder works performance, as power output and output are gone The difference of journey.Based on this, in order to popularize hydraulicdriven knowledge, allow first contacts hydraulic cylinder teenagers it is interesting go to visit Its internal principle of rope, it is necessary to develop a toy taught through lively activities.
The content of the invention
The invention aims to provide a kind of seesaw toy based on true and false piston.
To reach above-mentioned purpose, the technical solution adopted by the present invention is:A kind of seesaw toy based on true and false piston, institute The seesaw toy stated includes the reciprocating first hydraulic cylinder of output vertical direction and second hydraulic cylinder, wherein:
Described first hydraulic cylinder includes the first cylinder body and first piston bar assembly, and the first piston bar assembly includes the One piston rod and the first piston for being fixedly arranged on the First piston bar bottom, the first piston is located at first cylinder body Be connected in inner chamber and with its inner side perisporium phase dynamic sealing, the top of first cylinder body offers the confession First piston bar along upper The first through hole passed is slided in lower direction, and the bottom of first cylinder body offers the first liquid flow hole;
Described second hydraulic cylinder includes the second cylinder body and second piston bar assembly, and the second piston bar assembly includes the Two piston rods and the second piston for being fixedly arranged on the second piston bar bottom, the second piston is located at second cylinder body It is divided into upper chamber and lower chambers in inner chamber and by its inner chamber, the connection upper chamber and cavity of resorption is offered in the second piston The fluid course of room, the top of second cylinder body offer supply the second piston bar to be slidable in the vertical direction passing second Through hole, phase dynamic sealing connects between the second piston bar and second through hole, and the bottom of second cylinder body offers the Two liquid flow holes,
Pass through fluid flow tube phase liquid flowing connection between the first described liquid flow hole and the second liquid flow hole.
Preferably, the outside week of the second piston offers multiple open slots, the open slot and described second in portion Described fluid course is formed between the inner side perisporium of cylinder body.
Further, all open slots are circumferentially evenly spaced apart to be distributed in portion in the outside week of the second piston.
Preferably, the first piston, the identical of the diameter of second piston
Further, the First piston bar, the bar footpath of second piston bar are also identical.
Preferably, first cylinder body includes the first cylinder barrel and is installed in the first cylinder cap of the first cylinder barrel upper end, The first through hole is opened on first cylinder cap, and phase gap is matched somebody with somebody between the First piston bar and the first through hole Close.
Preferably, second cylinder body includes the second cylinder barrel and is installed in the second cylinder cap of the second cylinder barrel upper end, Second through hole is opened on second cylinder cap.
Preferably, the first stop plate for standing, the second piston bar are installed with the upper end of the First piston bar Upper end on be installed with for stand second station plate.
Preferably, the seesaw toy also includes the first lever assembly and the second lever assembly,
First lever assembly includes the first lever and first connecting rod, be pivotally connected in the middle part of first lever with In the installation pedestal of first cylinder body, the one end of the first connecting rod and the upper end phase pivot of the First piston bar connect Connect, the other end of the first connecting rod is connected with the one end phase pivot of first lever;
Second lever assembly includes the second lever and second connecting rod, and institute is pivotally connected in the middle part of second lever To state in installation pedestal, the one end of the second connecting rod is connected with the upper end phase pivot of the second piston bar, and described second The other end of connecting rod is connected with the one end phase pivot of second lever.
Due to the utilization of above-mentioned technical proposal, the present invention has following advantages compared with prior art:The present invention's lifts up Plate toy, it is based on true and false piston theory and pascal's principle designs so that can also learn while children are at play to multiple Miscellaneous knowwhy, it is a toy taught through lively activities, its is simple in construction, cost is relatively low and interesting stronger.
Brief description of the drawings
Accompanying drawing 1 is the structural representation of the embodiment of the present invention one;
Accompanying drawing 2 is the schematic cross-section of second hydraulic cylinder in embodiment one;
Accompanying drawing 3 is the structural representation of the embodiment of the present invention two;
Wherein:1st, first hydraulic cylinder;11st, the first cylinder barrel;12nd, the first cylinder cap;13rd, first piston;14th, First piston bar; 11a, the first liquid flow hole;2nd, second hydraulic cylinder;21st, the second cylinder barrel;22nd, the second cylinder cap;23rd, second piston;24th, second piston Bar;21a, the second liquid flow hole;23a, open slot;
3rd, fluid flow tube;4th, first stop plate;5th, second station plate;6th, the first lever assembly;61st, first connecting rod;62nd, the first thick stick Bar;7th, the second lever assembly;71st, second connecting rod;72nd, the second lever.
Embodiment
Technical scheme is further elaborated with specific embodiment below in conjunction with the accompanying drawings.
Embodiment one
A kind of seesaw toy based on true and false piston shown in Figure 1, it is reciprocal that it includes output vertical direction respectively The first hydraulic cylinder 1 of motion and second hydraulic cylinder 2, the structure of the two hydraulic cylinders are specific as follows:
First hydraulic cylinder 1 includes the first cylinder body and first piston bar assembly, and the first cylinder body includes the first cylinder barrel 11 and fixed The first cylinder cap 12 in the upper end of the first cylinder barrel 11.First piston bar assembly includes first piston 13 and First piston bar 14, the One piston rod 14 is vertically distributed, and first piston 13 is fixed on the bottom of First piston bar 14, and first piston 13 is located at It is connected in the inner chamber of first cylinder barrel 11 and with its all portion's phase dynamic sealing in inner side.Offered on first cylinder cap 12 for First piston bar 14 are slidable in the vertical direction the first through hole that passes, are mutually equipped with gap between First piston bar 14 and first through hole.The Underlying space in the inner chamber of one cylinder barrel 11 positioned at first piston 13 forms the rodless cavity of first hydraulic cylinder 1.First cylinder barrel 11 Bottom offers the first liquid flow hole 11a, for connecting the outside of first hydraulic cylinder 1 and above-mentioned rodless cavity.
Second hydraulic cylinder 2 includes the second cylinder body and second piston bar assembly, the second cylinder body include the second cylinder barrel 21 with it is fixed The second cylinder cap 22 in the upper end of the second cylinder barrel 21, the inner chamber of the second cylinder body is formed between the second cylinder barrel 21 and the second cylinder cap 22. Second piston bar assembly includes second piston 23 and second piston bar 24, and second piston bar 24 is also vertically distributed, and second Piston 23 is fixed on the bottom of second piston bar 24.
Its inner chamber is divided into upper chamber and lower chambers by second piston 23 in the inner chamber of the second cylinder body, second piston The fluid course for connecting above-mentioned upper chamber and lower chambers is offered on 23.In the present embodiment, specifically, referring to Fig. 1, Fig. 2 institute Show, offer the inner side perisporium of open slot 23a, each open slot 23a and the second cylinder barrel 21 the outside week of second piston 23 in portion Between be respectively formed a fluid course.Herein, open slot 23a is provided with three, and three open slot 23a are in second piston 23 Circumferentially it is evenly spaced apart to be distributed in outside week portion.Because not being tightly connected between the cylinder barrel 21 of second piston 23 and second, The second piston 23 is also referred to as pseudo- piston.
Offered on second cylinder cap 12 and be slidable in the vertical direction the second through hole for passing, second piston for second piston bar 24 Connected to phase dynamic sealing between bar 24 and the second through hole.The bottom of second cylinder barrel 21 offers the second liquid flow hole 21a, for connecting The outside of second hydraulic cylinder 2 and its cavity of resorption.
The seesaw toy also includes the fluid flow tube for being connected to above-mentioned first liquid flow hole 11a and above-mentioned second liquid flow hole 21a 3.The seesaw toy also includes being fixedly arranged on the first stop plate 4 for supplying to stand on the upper end of First piston bar 14, is fixedly arranged on the second work Second station plate 5 on the upper end of stopper rod 24 for standing.So, two people stand on first stop plate 4 and second station plate 5 respectively, It can realize that the lifting of seesaw is played action.
Especially, in the above-mentioned second hydraulic cylinder 2 of first hydraulic cylinder 1, first piston 13 is identical with the diameter of second piston 23, First piston bar 14 is also identical with the bar footpath of second piston bar 24.Two hydraulic cylinders seem the same from the appearance.
The inner workings of the seesaw are as follows:
When inputting external force Fo on the second station plate 5 in second hydraulic cylinder 2, second piston 23 and second piston bar 24 are common It is descending, pass through multiple fluid course phase liquid flowing connections, the liquid of its lower chambers in second hydraulic cylinder 2 between upper chamber and lower chambers Being entered by fluid flow tube 3 in the rodless cavity of first hydraulic cylinder 1 promotes first piston 13 jointly up with First piston bar 14, that is, pushes away Dynamic first stop plate 4 is up.
When inputting external force Fi on the first stop plate 4 in first hydraulic cylinder 1, first piston 13 and First piston bar 14 are common Descending, the liquid in the rodless cavity of first hydraulic cylinder 1 enters the lower chambers of second hydraulic cylinder 2 by fluid flow tube 3, promotes second to live Plug 23 moves upwards with second piston bar 24, that is, promotes second station plate 5 up.
According to pascal's principle:
Wherein, Di is the diameter of first piston 13, and do is the bar footpath of second piston bar 24.
It can be seen that inputting Fo power at second station plate 5, the power being subject at first stop plate 4 is then amplified to Di^2/do^2 Times, first stop plate 4 can be driven up.So, an individual weight is stood at second station plate 5 compared with the lighter, can also be easily by the The heavier-weight person to be stood at one station plate 4 sticks up, interesting strong.Meanwhile the stroke ratio of second station plate 5 and first stop plate 4 is then For Δ Lo/ Δ Li=Di^2/do^2, larger stroke amplification is realized.The less displacement of input i.e. at first stop plate 4, you can make Obtain second station plate 5 and export larger displacement.
Embodiment two
Shown in Figure 3, the present embodiment and the difference of embodiment one essentially consist in First piston bar 14 and second piston bar The setting of 24 upper end power input-output mechanism.In the present embodiment, what power input-output mechanism was set is respectively the One lever assembly 6 and the second lever assembly 7.
First lever assembly 6 includes the lever 62 of first connecting rod 61 and first, and the middle part of the first lever 62 is pivotally connected in One cylinder body installation pedestal (not shown in figure, can be lay the first cylinder body ground) on, the one end of first connecting rod 61 with The upper end phase pivot connection of First piston bar 14, the other end of first connecting rod 61 and the one end phase pivot of the first lever 62 Connection, the other end of the first lever 62 form the first power input unit sat or stood for a people.
Second lever assembly 7 includes the lever 72 of second connecting rod 71 and second, and the middle part of the second lever 72 is also pivotally connected in In above-mentioned installation pedestal, the one end of second connecting rod 71 is connected with the upper end phase pivot of second piston bar 24, second connecting rod 71 the other end is connected with the one end phase pivot of the second lever 72, and the other end of the second lever 72 is formed stands for another people Or the second power input unit sat.
So, two children are sat or stood respectively on the outer end of the first lever 62 and the second lever 72, you can realization is lifted up The lifting of seesaw is played action.
To sum up, seesaw toy of the invention, it is based on true and false piston theory and pascal's principle designs so that Er Tong The knowwhy to complexity can also be learnt while playing, be a toy taught through lively activities.
The above embodiments merely illustrate the technical concept and features of the present invention, and its object is to allow person skilled in the art Scholar can understand present disclosure and implement according to this, and it is not intended to limit the scope of the present invention.It is all according to the present invention The equivalent change or modification that Spirit Essence is made, it should all be included within the scope of the present invention.

Claims (9)

  1. A kind of 1. seesaw toy based on true and false piston, it is characterised in that:Described seesaw toy includes the vertical side of output To reciprocating first hydraulic cylinder and second hydraulic cylinder, wherein:
    Described first hydraulic cylinder includes the first cylinder body and first piston bar assembly, and the first piston bar assembly includes first and lived Stopper rod and the first piston for being fixedly arranged on the First piston bar bottom, the first piston are located at the inner chamber of first cylinder body In and be connected with its inner side perisporium phase dynamic sealing, the top of first cylinder body is offered for the First piston bar vertically just The first through hole passed to slip, the bottom of first cylinder body offer the first liquid flow hole;
    Described second hydraulic cylinder includes the second cylinder body and second piston bar assembly, and the second piston bar assembly includes second and lived Stopper rod and the second piston for being fixedly arranged on the second piston bar bottom, the second piston are located at the inner chamber of second cylinder body In and its inner chamber is divided into upper chamber and lower chambers, the connection upper chamber and lower chambers are offered in the second piston Fluid course, the top of second cylinder body offer be slidable in the vertical direction passing for the second piston bar second and led to Hole, phase dynamic sealing connects between the second piston bar and second through hole, and the bottom of second cylinder body offers second Liquid flow hole,
    Pass through fluid flow tube phase liquid flowing connection between the first described liquid flow hole and the second liquid flow hole.
  2. A kind of 2. seesaw toy based on true and false piston according to claim 1, it is characterised in that:The second piston Offer multiple open slots in portion in outside week, formed between the open slot and the inner side perisporium of second cylinder body described Fluid course.
  3. A kind of 3. seesaw toy based on true and false piston according to claim 2, it is characterised in that:All open slots Circumferentially it is evenly spaced apart to be distributed in portion in the outside week of the second piston.
  4. A kind of 4. seesaw toy based on true and false piston according to claim 1, it is characterised in that:Described first lives Plug, the diameter of second piston are identical.
  5. A kind of 5. seesaw toy based on true and false piston according to claim 4, it is characterised in that:The first piston Bar, the bar footpath of second piston bar are also identical.
  6. A kind of 6. seesaw toy based on true and false piston according to claim 1, it is characterised in that:First cylinder body Including the first cylinder barrel and the first cylinder cap for being installed in the first cylinder barrel upper end, the first through hole is opened in first cylinder Cover, and phase gap coordinates between the First piston bar and the first through hole.
  7. A kind of 7. seesaw toy based on true and false piston according to claim 1, it is characterised in that:Second cylinder body Including the second cylinder barrel and the second cylinder cap for being installed in the second cylinder barrel upper end, second through hole is opened in second cylinder Cover.
  8. A kind of 8. seesaw toy based on true and false piston according to any one of claims 1 to 7, it is characterised in that:It is described The first stop plate for standing is installed with the upper end of First piston bar, is installed with the upper end of the second piston bar for station Vertical second station plate.
  9. A kind of 9. seesaw toy based on true and false piston according to any one of claims 1 to 7, it is characterised in that:It is described Seesaw toy also includes the first lever assembly and the second lever assembly,
    First lever assembly includes the first lever and first connecting rod, be pivotally connected in the middle part of first lever with it is described In the installation pedestal of first cylinder body, the one end of the first connecting rod is connected with the upper end phase pivot of the First piston bar, The other end of the first connecting rod is connected with the one end phase pivot of first lever;
    Second lever assembly includes the second lever and second connecting rod, and the peace is pivotally connected in the middle part of second lever Fill on pedestal, the one end of the second connecting rod is connected with the upper end phase pivot of the second piston bar, the second connecting rod The other end be connected with the one end phase pivot of second lever.
CN201711016907.7A 2017-10-26 2017-10-26 Seesaw toy based on true and false pistons Active CN107676318B (en)

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Application Number Priority Date Filing Date Title
CN201711016907.7A CN107676318B (en) 2017-10-26 2017-10-26 Seesaw toy based on true and false pistons

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CN107676318A true CN107676318A (en) 2018-02-09
CN107676318B CN107676318B (en) 2023-07-07

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Citations (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB707962A (en) * 1949-11-07 1954-04-28 Boulton Aircraft Ltd Improvements in and relating to hydraulic jacks
CN1485546A (en) * 2003-08-19 2004-03-31 让 焦 Hydraulic reinforcement electric cylinder
KR20100133579A (en) * 2009-06-12 2010-12-22 윤동근 Eans of raising the power by utilizing the seesaw's automatic principle and its device
CN201807191U (en) * 2010-03-19 2011-04-27 上海百花教育信息咨询服务有限公司 Educational toys
CN202971403U (en) * 2012-12-12 2013-06-05 东莞朗诚微电子设备有限公司 Mould oil cylinder device
CN103402872A (en) * 2010-10-26 2013-11-20 Aba科技活动有限公司 Helicopter amusement apparatus
CN203772548U (en) * 2014-03-06 2014-08-13 深圳市三源色文化传播有限公司 Seesaw pavement simulation device
CN104358735A (en) * 2014-10-22 2015-02-18 湖州环丰机械有限公司 Lifting hydraulic oil cylinder
CN104436668A (en) * 2014-12-02 2015-03-25 盖淑娥 Car-decorating seesaw toy
CN204324795U (en) * 2014-12-18 2015-05-13 李瑞杰 Manual hydraulic jack
CN105217027A (en) * 2015-09-24 2016-01-06 苏州大闹天宫机器人科技有限公司 Vertical takeoff and landing formula bimodal airflight equipment and control method thereof
CN106142645A (en) * 2016-08-31 2016-11-23 吉林省旺达机械设备有限公司 Four-point seesaw type static organ
CN106273430A (en) * 2016-08-19 2017-01-04 河北驰特轨道交通设备有限公司 A kind of children's electric motor vehicle wheel belt automatic mounting machine
CN106606867A (en) * 2015-10-23 2017-05-03 西北农林科技大学 Children toy seesaw
CN106669150A (en) * 2015-11-09 2017-05-17 重庆酷奇模型有限公司 Fingerprint control type seesaw
CN107137932A (en) * 2017-06-08 2017-09-08 方佳璐 A kind of Novel seesaw and its implementation
CN206508539U (en) * 2017-01-09 2017-09-22 四川农业大学 A kind of children toy car seesaw performs control device
CN207315758U (en) * 2017-10-26 2018-05-04 苏州大闹天宫机器人科技有限公司 Seesaw toy based on true and false piston

Patent Citations (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB707962A (en) * 1949-11-07 1954-04-28 Boulton Aircraft Ltd Improvements in and relating to hydraulic jacks
CN1485546A (en) * 2003-08-19 2004-03-31 让 焦 Hydraulic reinforcement electric cylinder
KR20100133579A (en) * 2009-06-12 2010-12-22 윤동근 Eans of raising the power by utilizing the seesaw's automatic principle and its device
CN201807191U (en) * 2010-03-19 2011-04-27 上海百花教育信息咨询服务有限公司 Educational toys
CN103402872A (en) * 2010-10-26 2013-11-20 Aba科技活动有限公司 Helicopter amusement apparatus
CN202971403U (en) * 2012-12-12 2013-06-05 东莞朗诚微电子设备有限公司 Mould oil cylinder device
CN203772548U (en) * 2014-03-06 2014-08-13 深圳市三源色文化传播有限公司 Seesaw pavement simulation device
CN104358735A (en) * 2014-10-22 2015-02-18 湖州环丰机械有限公司 Lifting hydraulic oil cylinder
CN104436668A (en) * 2014-12-02 2015-03-25 盖淑娥 Car-decorating seesaw toy
CN204324795U (en) * 2014-12-18 2015-05-13 李瑞杰 Manual hydraulic jack
CN105217027A (en) * 2015-09-24 2016-01-06 苏州大闹天宫机器人科技有限公司 Vertical takeoff and landing formula bimodal airflight equipment and control method thereof
CN106606867A (en) * 2015-10-23 2017-05-03 西北农林科技大学 Children toy seesaw
CN106669150A (en) * 2015-11-09 2017-05-17 重庆酷奇模型有限公司 Fingerprint control type seesaw
CN106273430A (en) * 2016-08-19 2017-01-04 河北驰特轨道交通设备有限公司 A kind of children's electric motor vehicle wheel belt automatic mounting machine
CN106142645A (en) * 2016-08-31 2016-11-23 吉林省旺达机械设备有限公司 Four-point seesaw type static organ
CN206508539U (en) * 2017-01-09 2017-09-22 四川农业大学 A kind of children toy car seesaw performs control device
CN107137932A (en) * 2017-06-08 2017-09-08 方佳璐 A kind of Novel seesaw and its implementation
CN207315758U (en) * 2017-10-26 2018-05-04 苏州大闹天宫机器人科技有限公司 Seesaw toy based on true and false piston

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