CN107510574A - A kind of liquid metal ectoskeleton joint - Google Patents

A kind of liquid metal ectoskeleton joint Download PDF

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Publication number
CN107510574A
CN107510574A CN201710854253.9A CN201710854253A CN107510574A CN 107510574 A CN107510574 A CN 107510574A CN 201710854253 A CN201710854253 A CN 201710854253A CN 107510574 A CN107510574 A CN 107510574A
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CN
China
Prior art keywords
liquid metal
phase change
fluid
temperature
thermally conductive
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Pending
Application number
CN201710854253.9A
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Chinese (zh)
Inventor
姚又友
刘静
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Tsinghua University
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Tsinghua University
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Publication date
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Priority to CN201710854253.9A priority Critical patent/CN107510574A/en
Publication of CN107510574A publication Critical patent/CN107510574A/en
Pending legal-status Critical Current

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Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61HPHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
    • A61H1/00Apparatus for passive exercising; Vibrating apparatus; Chiropractic devices, e.g. body impacting devices, external devices for briefly extending or aligning unbroken bones
    • A61H1/02Stretching or bending or torsioning apparatus for exercising
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25JMANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
    • B25J17/00Joints
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25JMANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
    • B25J9/00Programme-controlled manipulators
    • B25J9/0006Exoskeletons, i.e. resembling a human figure
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61HPHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
    • A61H2201/00Characteristics of apparatus not provided for in the preceding codes
    • A61H2201/02Characteristics of apparatus not provided for in the preceding codes heated or cooled
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61HPHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
    • A61H2201/00Characteristics of apparatus not provided for in the preceding codes
    • A61H2201/14Special force transmission means, i.e. between the driving means and the interface with the user
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61HPHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
    • A61H2201/00Characteristics of apparatus not provided for in the preceding codes
    • A61H2201/16Physical interface with patient
    • A61H2201/1602Physical interface with patient kind of interface, e.g. head rest, knee support or lumbar support
    • A61H2201/165Wearable interfaces

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  • Engineering & Computer Science (AREA)
  • Robotics (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Pain & Pain Management (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Rehabilitation Therapy (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Thermotherapy And Cooling Therapy Devices (AREA)

Abstract

A kind of liquid metal ectoskeleton joint of the present invention, including:Rotation joint structure;The liquid metal phase change material being arranged at rotation joint structure rotation node;It is arranged at the flexible integument for being used to seal it outside liquid metal phase change material;And the temperature control device of control liquid metal phase change material temperature;By controlling the temperature of liquid metal phase change material, conversion of the liquid metal phase change material between liquid and solid-state is realized, so as to realize switching of the ectoskeleton joint between movable and immovable state.In specific embodiment, it may include thermally conductive sheet, flexible integument, liquid metal phase change material, heat exchange cavity, fluid line, heat-transfer fluid, fluid pump, control circuit and fluid temperature controller etc..The present invention can realize ectoskeleton joint in the movable switching between immovable state by the solid-liquid phase change of temperature control liquid metal phase change material, have simple in construction, in light weight, the advantages of switch speed is fast and intensity is high.

Description

A kind of liquid metal ectoskeleton joint
Technical field
The invention belongs to ectoskeleton technical field, more particularly to a kind of liquid metal ectoskeleton joint.
Background technology
Ectoskeleton technology is widely used in fields such as military affairs, medical rehabilitations in recent years.With lightweight alloy The application of material and the miniaturization of motor, the volume and weight of ectoskeleton also constantly reduce.Ectoskeleton is divided into active and quilt Two kinds of dynamic formula, wherein active ectoskeleton is by motor or hydraulic booster so that user can have extraordinary strength, or Person is to aid in quadriplegia, and person can recover autokinetic movement to a certain extent.Passive type ectoskeleton is mainly used for the limbs of patient Fixed or reinforcing, it does not have driving element such as motor or hydraulic means, and being mainly characterized by can be in movable state and immovable shape Switched between state,, then can be with when in immovable state without limitation on the motion of user during in movable state Limbs are fixed, or by transferring the pressure to other positions, help user rest or can remove Transport heavier object.
For passive type ectoskeleton, the joint for allowing hand over movable state is mostly important part, and traditional can Switching joint uses Mechanical locking features more, using the design of mechanical structure, coordinates motor etc. to realize the switching of state.Mechanical lock Determine that the design of structure is often complex, and its intensity also there can be larger difference according to the difference of design.
The content of the invention
The shortcomings that in order to overcome above-mentioned prior art, it is an object of the invention to provide a kind of liquid metal ectoskeleton pass Section, using after the phase-change characteristic of room temperature liquid metal and its solidification the characteristics of shear stress increase, with reference to passive type ectoskeleton Demand, realizing can be in the movable ectoskeleton joint switched between immovable state, and it has, and switch speed is fast, structure letter It is single, in light weight, the advantages that intensity is high;It can be used in arm or leg joint in passive type ectoskeleton, can also coordinate active Ectoskeleton is used, and light-weighted ectoskeleton design is realized in help.
To achieve these goals, the technical solution adopted by the present invention is:
A kind of liquid metal ectoskeleton joint, including:
Rotation joint structure;
The liquid metal phase change material being arranged at rotation joint structure rotation node;
It is arranged at the flexible integument for being used to seal it outside liquid metal phase change material;
And
Control the temperature control device of liquid metal phase change material temperature;
By controlling the temperature of liquid metal phase change material, realize that liquid metal phase change material turns between liquid and solid-state Change, so as to realize switching of the ectoskeleton joint between movable and immovable state.
The rotation joint structure includes thermally conductive sheet, and thermally conductive sheet, which is that multilayer is overlapping, to be designed, in-between hole, after insertion axle Rotation joint structure is formed, the temperature control device acts on thermally conductive sheet, and liquid metal phase is controlled by the heat transfer effect of thermally conductive sheet Become the temperature of material.
The temperature control device includes heat exchange cavity, and heat exchange cavity is connected with thermally conductive sheet, is handed over by changing heat The temperature changed in cavity, realize the control to thermally conductive sheet temperature.
The heat exchange cavity is connected with fluid line, there is heat-transfer fluid in fluid line, set on fluid line with The fluid pump and fluid temperature controller of control circuit connection, by fluid pump Heat Transfer Control fluid in fluid line and heat exchange Cavity internal circulation flow, the temperature of fluid temperature controller Heat Transfer Control fluid.
The thermally conductive sheet and heat exchange cavity material therefor are the metal with some strength and Thermal conductivity, closed Gold or plastics;The heat-transfer fluid is the flowing material with certain specific heat capacity, and heat-transfer fluid is driven by fluid pump, can passed through Fluid line circulates between fluid temperature controller and heat exchange cavity, and changes the temperature of thermally conductive sheet by conducting heat Degree.
The thermally conductive sheet and heat exchange cavity material therefor are copper, iron, gold, silver, zinc, lead, or have mixed metal The plastics of particle or fiber;The heat-transfer fluid is water, oily substance or the aqueous solution;The material of the flexible integument is elasticity High-molecular organic material;The liquid metal phase change material is gallium metal or gallium-base alloy of the fusing point in the range of room temperature, can Infiltrate, can be chosen according to without the requirement under application scenario to metal machinery intensity and fusing point with thermally conductive sheet.
The fluid temperature controller is with heating and refrigerating function, and the temperature range of Heat Transfer Control fluid is at -50 DEG C to 100 Between DEG C;The control circuit controls the switch of fluid pump and the refrigeration of fluid temperature controller or heating as needed, realizes To the temperature adjustment of liquid metal phase change material, and then change movable/non-movable state in ectoskeleton joint.
The heat exchange cavity has two, and the multi-layered thermally conductive sheet being connected between two heat exchange cavitys is mutually handed over Folded, thermally conductive sheet one end is inserted in a heat exchange cavity, can be in contact with heat-transfer fluid, other end infiltration liquid metal phase Become material and be hinged with the thermally conductive sheet on another heat exchange cavity.
The flexible integument seals to liquid metal phase change material, avoids it from being spilt in liquid;Flexibility parcel Layer is connected between two heat exchange cavitys, and thermally conductive sheet and liquid metal phase change material are wrapped in into inside.
The heat exchange cavity is connected with thermally conductive sheet and forms joint body, and is applied to be used to connect in ectoskeleton And fixing arm or leg, heat exchange cavity have internal cavity structures, can flow into heat-transfer fluid, and change thermally conductive sheet Temperature.
Compared with prior art, the present invention realizes a kind of joint designs available for passive type ectoskeleton, can be can It is dynamic to be switched fast between state and immovable state, while there is the characteristics of simple in construction, intensity is high and in light weight, it is expected to Applied in the fields such as military affairs, medical treatment, Robot Design.
Brief description of the drawings
Fig. 1 is liquid metal ectoskeleton articulation structure schematic diagram (stereogram) of the present invention.
Fig. 2 is the side sectional view at liquid metal ectoskeleton articulation structure of the present invention.
Fig. 3 is schematic diagram of the ectoskeleton joint of the present invention under movable state, and now liquid metal phase change material is liquid, Fluid temperature controller is heated condition, and heat-transfer fluid temperature is higher than liquid metal fusing point.
Fig. 4 is schematic diagram of the ectoskeleton joint of the present invention under immovable state, and now liquid metal phase change material is solid State, fluid temperature controller are refrigerating state, and heat-transfer fluid temperature is less than liquid metal fusing point.
Fig. 5 is schematic diagram of the liquid metal ectoskeleton joint on human elbow of the present invention.
Embodiment
Describe embodiments of the present invention in detail with reference to the accompanying drawings and examples.
Liquid metal is the general designation of big a metalloid and alloy of the fusing point in the range of room temperature, generally with gallium metal (fusing point 29.5 degrees Celsius) based on, including gallium-base alloy etc..In the range of room temperature, by adjusting the temperature of metal, liquid metal can be allowed Switched between solid phase and liquid phase, this feature can be used to realize the design in new ectoskeleton joint.
Based on this, the invention provides a kind of movable ectoskeleton joint realized using liquid metal, Fig. 1 is its signal Figure, while be also one embodiment.Ectoskeleton joint includes thermally conductive sheet 1, flexible integument 2, liquid metal phase change material 3, heat Amount exchanges cavity 4, fluid line 5, heat-transfer fluid 6, fluid pump 7, control circuit 8 and fluid temperature controller 9 etc..
As shown in Fig. 2 thermally conductive sheet 1 includes the copper metal piece of 5 array arrangements, and it is connected to two heat exchange skies On chamber 4.Heat exchange cavity 4 is connected with fluid line 5, and heat-transfer fluid 6 in the internal flow of fluid line 5, in the work of fluid pump 7 Separately flowed under and flow out heat exchange cavity 4.Fluid line 5 is also connected with fluid temperature controller 9 simultaneously.The He of fluid pump 7 Fluid temperature controller 9 is connected with control circuit 8 and carries out temperature control and flow of fluid control according to the instruction of control circuit 8 System.
When needing ectoskeleton joint to be in movable state, fluid temperature controller 9 is in heated condition, by heat-transfer fluid 6 temperature is heated to more than the fusing point of liquid metal phase change material 3, and the heat-transfer fluid 6 after heating is pumped to heat by fluid pump 7 Exchange in cavity 4, while copper thermally conductive sheet 1 is heated, using heat transfer effect so that liquid metal phase change material 3 is changed into liquid State, then can freely it be rotated between thermally conductive sheet 1, joint is active, as shown in figure 3, between two heat exchange cavitys 4 Can freely it rotate.
When needing ectoskeleton joint to be in the lock state, fluid temperature controller 9 is in refrigerating state so that heat-transfer fluid 6 temperature is located at below the fusing point of liquid metal phase change material 3, and the heat-transfer fluid 6 of supercooling is pumped to heat exchange by fluid pump 7 In cavity 4 so that copper thermally conductive sheet 1 cools, and then causes liquid metal phase change material 3 to be changed into solid-state, the quilt between each other of thermally conductive sheet 1 Fixation can not be rotated, and joint is in the lock state, as shown in figure 4, now joint can bear certain ambient pressure without sending out It is raw to rotate.
Fig. 2 is the structural representation of liquid metal ectoskeleton intra articular of the present invention, is worked as specific to the present embodiment In, heat exchange cavity 4 is plastic casing composition, and thermally conductive sheet 1 is copper metal piece, and one end is goed deep into heat exchange cavity, separately One end forms articulated structure.Flexible integument 2 is elastic silica gel material, and thermally conductive sheet 1 and liquid metal phase change material 3 are wrapped up Between two heat exchange cavitys 4, liquid metal phase change material 3 mutually infiltrates with thermally conductive sheet 1.When heat-transfer fluid 6 is along arrow When shown direction is flowed into heat exchange cavity 4, one end of thermally conductive sheet 1 can be heated or freezed, utilize heat transfer effect So that the other end also heats up or cooled, and then change the mushy stage of liquid metal phase change material 3, realize joint movably with can not Switching between dynamic.
Fig. 5 is schematic diagram of the liquid metal ectoskeleton joint on human elbow proposed by the present invention, two heats Cavity 4 is exchanged to be separately fixed on upper arm and underarm, fluid line 5 is attached on upper arm, when needing freely movable, ectoskeleton Joint is in open mode, and when needing to strengthen external force, ectoskeleton joint is in the lock state.
It should be noted last that the embodiment in the ectoskeleton joint that one of the above is realized based on liquid metal, only to Illustrate technical scheme and unrestricted.Although the present invention is described in detail with reference to embodiment, this area it is general It is logical it will be appreciated by the skilled person that being modified to technical scheme or equivalent substitution, without departure from the technology of the present invention The spirit and scope of scheme, it all should cover among scope of the presently claimed invention.

Claims (10)

  1. A kind of 1. liquid metal ectoskeleton joint, it is characterised in that including:
    Rotation joint structure;
    The liquid metal phase change material (3) being arranged at rotation joint structure rotation node;
    It is arranged at the flexible integument (2) that liquid metal phase change material (3) is used to seal it outside;
    And
    Control the temperature control device of liquid metal phase change material (3) temperature;
    By controlling the temperature of liquid metal phase change material (3), realize liquid metal phase change material (3) between liquid and solid-state Conversion, so as to realize switching of the ectoskeleton joint between movable and immovable state.
  2. 2. liquid metal ectoskeleton joint according to claim 1, it is characterised in that the rotation joint structure includes heat conduction Piece (1), thermally conductive sheet (1), which is that multilayer is overlapping, to be designed, in-between hole, and rotation joint structure, the temperature control are formed after insertion axle Equipment acts on thermally conductive sheet (1), and the temperature of liquid metal phase change material (3) is controlled by the heat transfer effect of thermally conductive sheet (1).
  3. 3. liquid metal ectoskeleton joint according to claim 2, it is characterised in that the temperature control device includes heat exchange Cavity (4), heat exchange cavity (4) are connected with thermally conductive sheet (1), by changing the temperature in heat exchange cavity (4), realization pair The control of thermally conductive sheet (1) temperature.
  4. 4. liquid metal ectoskeleton joint according to claim 3, it is characterised in that heat exchange cavity (4) connection There is fluid line (5), have heat-transfer fluid (6) in fluid line (5), set what is be connected with control circuit (8) on fluid line (5) Fluid pump (7) and fluid temperature controller (9), handed over by fluid pump (7) Heat Transfer Control fluid (6) in fluid line (5) and heat Change cavity (4) internal circulation flow, the temperature of fluid temperature controller (9) Heat Transfer Control fluid (6).
  5. 5. liquid metal ectoskeleton joint according to claim 4, it is characterised in that the thermally conductive sheet (1) and heat exchange Cavity (4) material therefor is the metal with some strength and Thermal conductivity, alloy or plastics;The heat-transfer fluid (6) For the flowing material with certain specific heat capacity.
  6. 6. liquid metal ectoskeleton joint according to claim 4, it is characterised in that the thermally conductive sheet (1) and heat exchange Cavity (4) material therefor is copper, iron, gold, silver, zinc, lead, or has mixed the plastics of metallic particles or fiber;The heat transfer Fluid (6) is water, oily substance or the aqueous solution;The material of the flexible integument (2) is elastic high-molecular organic material;It is described Liquid metal phase change material (3) is gallium metal or gallium-base alloy of the fusing point in the range of room temperature, can be infiltrated with thermally conductive sheet (1).
  7. 7. liquid metal ectoskeleton joint according to claim 4, it is characterised in that the fluid temperature controller (9) carries Heating and refrigerating function, the temperature range of Heat Transfer Control fluid (6) is between -50 DEG C to 100 DEG C;Control circuit (8) root According to refrigeration or the heating of the switch and fluid temperature controller (9) for needing to control fluid pump (7), realize to liquid metal phase change material Expect the temperature adjustment of (3), and then change movable/non-movable state in ectoskeleton joint.
  8. 8. according to the liquid metal ectoskeleton joint of claim 3 or 4, it is characterised in that the heat exchange cavity (4) has Two, the multi-layered thermally conductive sheet (1) being connected between two heat exchange cavitys (4) is mutually overlapping, thermally conductive sheet (1) one end insertion one In individual heat exchange cavity (4), can be in contact with heat-transfer fluid, other end infiltration liquid phase change materials (3) and with it is another Thermally conductive sheet (1) on one heat exchange cavity (4) is be hinged.
  9. 9. according to the liquid metal ectoskeleton joint of claim 3 or 4, it is characterised in that the flexible integument (2) is to liquid State phase change materials (3) are sealed, and avoid it from being spilt in liquid;Flexible integument (2) is connected to two heat exchanges Between cavity (4), thermally conductive sheet (1) and liquid metal phase change material (3) are wrapped in inside.
  10. 10. according to the liquid metal ectoskeleton joint of claim 3 or 4, it is characterised in that the heat exchange cavity (4) It is connected with thermally conductive sheet (1) and forms joint body, and is applied in ectoskeleton for connecting simultaneously fixing arm or leg, heat Exchanging cavity (4) has internal cavity structures, can flow into heat-transfer fluid (6), and change the temperature of thermally conductive sheet (1).
CN201710854253.9A 2017-09-20 2017-09-20 A kind of liquid metal ectoskeleton joint Pending CN107510574A (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108274447A (en) * 2018-01-25 2018-07-13 陕西理工大学 A kind of self-retaining formula mechanical arm in environment of extremely trembling with fear
CN108542743A (en) * 2018-05-04 2018-09-18 北京梦之墨科技有限公司 A kind of massage apparatus
CN108818590A (en) * 2018-07-23 2018-11-16 中国地质大学(武汉) Liquid metal humanoid robot Dextrous Hand
CN110179542A (en) * 2019-06-14 2019-08-30 北京罗森博特科技有限公司 A kind of passive arm and the mechanical equipment with the passive arm
CN113119149A (en) * 2021-04-07 2021-07-16 清华大学 Magnetic liquid-state gripper based on low-melting-point metal solid-liquid phase change and application thereof
CN113386166A (en) * 2021-06-18 2021-09-14 大连理工大学 Decoupling variable-rigidity joint suitable for super-redundant mechanical arm
CN114505883A (en) * 2022-03-23 2022-05-17 北京信息科技大学 Guyed robot-oriented liquid metal auxiliary universal joint and design method

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103331754A (en) * 2013-06-26 2013-10-02 清华大学 Metal phase-change based flexible mechanical joint device
CN103959029A (en) * 2011-09-24 2014-07-30 哈佛大学校长及研究员协会 Artificial skin and elastic strain sensor
CN105287166A (en) * 2015-12-02 2016-02-03 厦门大学 Wearable elbow joint rehabilitation training robot
CN106393073A (en) * 2016-11-18 2017-02-15 武汉大学 Portable type flexible-elbow-joint exoskeleton robot

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103959029A (en) * 2011-09-24 2014-07-30 哈佛大学校长及研究员协会 Artificial skin and elastic strain sensor
CN103331754A (en) * 2013-06-26 2013-10-02 清华大学 Metal phase-change based flexible mechanical joint device
CN105287166A (en) * 2015-12-02 2016-02-03 厦门大学 Wearable elbow joint rehabilitation training robot
CN106393073A (en) * 2016-11-18 2017-02-15 武汉大学 Portable type flexible-elbow-joint exoskeleton robot

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108274447A (en) * 2018-01-25 2018-07-13 陕西理工大学 A kind of self-retaining formula mechanical arm in environment of extremely trembling with fear
CN108274447B (en) * 2018-01-25 2022-02-22 烟台汽车工程职业学院 Self-fixing mechanical arm used in extremely cold environment
CN108542743A (en) * 2018-05-04 2018-09-18 北京梦之墨科技有限公司 A kind of massage apparatus
CN108542743B (en) * 2018-05-04 2024-05-03 北京梦之墨科技有限公司 Massage equipment
CN108818590A (en) * 2018-07-23 2018-11-16 中国地质大学(武汉) Liquid metal humanoid robot Dextrous Hand
CN108818590B (en) * 2018-07-23 2022-12-30 中国地质大学(武汉) Dexterous hand of liquid metal robot
CN110179542A (en) * 2019-06-14 2019-08-30 北京罗森博特科技有限公司 A kind of passive arm and the mechanical equipment with the passive arm
CN113119149A (en) * 2021-04-07 2021-07-16 清华大学 Magnetic liquid-state gripper based on low-melting-point metal solid-liquid phase change and application thereof
CN113386166A (en) * 2021-06-18 2021-09-14 大连理工大学 Decoupling variable-rigidity joint suitable for super-redundant mechanical arm
CN114505883A (en) * 2022-03-23 2022-05-17 北京信息科技大学 Guyed robot-oriented liquid metal auxiliary universal joint and design method

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