Keeping direction unchanged during rotation 3 thang010146 2024-10-16 | Keeping direction unchanged during rotation 3
Thrust vector control thang010146 2024-05-25 | The blue base is fixed to a rocket.The burner-nozzle (brass) are fixed to the yellow disk.Two pairs of bearings (blue) and a crosstree (pink) which functions as gimbal to connect the burner-nozzel to the base.Two electromechanical actuators (beige) that are responsible for generating movement (rotation of the yellow disk in two vertical planes perpendicular to each other). They are connected to other parts by spherical joints. The gas flow creates a torque around the center of mass of the rocket, thus causing the rocket to change direction of motion.The final scene of the video shows the direction of motion (blue arrow) of the blue rocket relative to the direction of gas flow (red arrow).This video is made based on an article:https://abcm.org.br/app/webroot/anais/cobem/2013/PDF/1182.pdf
Seat back adjuster 1 thang010146 2024-05-19 | When the green lever is raised, its slot will take the pink tooth bar out of the yellow gear of the yellow seat back frame to unlock the seat back.Move the seat back frame to the desired position, release the green lever, the red spring lowers the green lever to lock the seat back frame by pressing the pink tooth bar towards the yellow seat back frame gear.Any moment applied to the seat back frame cannot cause the pink tooth bar to rotate because the gear force is directed toward the axis of rotation of the pink tooth bar.The blue spiral spring (its inner end is fixed) tends to rotate the seat back frame counterclockwise.The green pin of the lever and the circular slot of the seat base give the lever its rigidity.Green and orange arrows represent human actions to adjust the chair back.This video is made based on videoyoutu.be/SleXUhHLkH8
Airplane wing folding mechanism thang010146 2024-05-14 | The orange cylinder turns the green cranks which in turn control the position of the yellow wings.The green and pink crank and yellow connecting rod form a spherical 4-bar linkage. The angle between the fixed revolution joints of the linkage is 100 degrees.The yellow wing is fixed to the yellow connecting rod.This video focuses on explaining the mechanism of folding the wings, so the airplane was built symbolically.This video is made based on videoyoutu.be/PF7AwbuNB3Q
Three-step folding ladder 2 thang010146 2024-05-09 | Turn the yellow and beige frames to fold or deploy the ladder.The yellow frame, blue steps and pink bars form a parallelogram mechanism.There are V-shaped grooves on the back of the top step to lock the ladder in the deployed state.This video is made based on videoyoutu.be/6aKsI14fBdQ
Three-step folding ladder 1 thang010146 2024-05-05 | Turn the jade frame to fold or deploy the ladder.The pink frame, yellow and blue bars form a parallelogram mechanism.The red pins fixed to the jade frame slide in slots of the blue bars.This video is made based on videoyoutu.be/XOQM3X8Gi9Q
Mechanism for changing UAV wing position thang010146 2024-04-30 | The beige electric motors turn the pink screws and make the green sliders move back and forth to deploy or fold the wings.The orange wing is connected to the UAV fuselage by a revolution joint.The green slider, violet connecting rod and orange wing create a spatial slider-crank mechanism. The connecting rod has two spherical joints (youtu.be/KfGUpfkucNM).The UAV flies vertically when wings are in folded position and flies horizontally when the wings are in the open position.This video is made based on videoyoutu.be/kA1ENhxLqToyoutu.be/-QAy2u33BEcand the patent US 10,252,798 B2STEP files of this video:mediafire.com/file/cfp1c7qr8yhajhr/MechanismUAVWingPositionSTEP.zip/fileInventor files of this video:mediafire.com/file/bucrfn4ilb5mpcp/MechanismUAVWingPositionInv.zip/file
Converting two-way linear motion into one-way rotation 7b thang010146 2024-04-26 | This mechanism is developed from the mechanism of videoyoutu.be/SPQk_ymBOTsInput: blue sliders (linear cams) reciprocating synchronically.Output: yellow shaft rotating continuously.This mechanism has not been tested in practice.
Wedge button thang010146 2024-04-26 | Thanks to the wedge mechanism, the pink rod moves to the right when the yellow button is pressed.The red spring returns both to their original position.Button diameter: 10 mmRod diameter: 7.5 mmWhen the button moves down 5 mm, the pink rod moves 3 mm to the right.
Musical roly poly thang010146 2024-04-20 | The toy is mostly hollow with a weight (grey) at the bottom so the center of mass of the toy is lower than the center of the spherical base of the toy. When pushed over, the toy wobbles for a few moments while it seeks the upright orientation.The pink hammer acts as a pendulum and strikes the red vibrating wires of different lengths to create musical sounds.This video is made based on the patent:patents.google.com/patent/US3921331A/en
Linear deploying objects at equal distances 1b thang010146 2024-04-20 | The green nut is fixed to the first pink slider.Turn the orange screw to move the pink sliders, thus to control their linear positions. The distances between the pink sliders are kept always equal to each other thanks to the blue bars that connect the pink sliders. The slider position accuracy is affected by the gaps in the blue bar revolution joints.This video aims to overcome the disadvantages of the mechanism in the videoyoutu.be/OKX6uY5r68Ein which the pink slider cannot move properly because the force acting on the slider is not symmetrical.
Foldable shelve mechanism thang010146 2024-04-15 | Rotate the orange disc at different angles to obtain different positions of the pink shelves. Each shelf is controlled by a blue face cam. The orange disc and the blue face cams are fixed on the blue vertical shaft. The red spring pin positions the vertical shaft.This video was made at the request of a YouTube viewer.
Pick and place mechanism 16 thang010146 2024-04-10 | The pink crank performs 90 deg. oscillation thanks to the beige motor via a 4-bar linkage (yellow, orange and pink).The blue arm belongs to a type of slider-crank mechanism called the oscillating cylinder mechanism youtu.be/AykTX6q44aAHere the green acts as an oscillating cylinder. The blue arm plays the role of the piston.
Robot arm 1b thang010146 2024-04-05 | The orange end effector can move in the XOY vertical plane (3 degrees of freedom). The effector is pivoted at the end of the yellow connecting rod of a parallelogram mechanism (pink, red, yellow and white). The input motions of the red and pink cranks are provided by red and pink grounded servo motors. They make the effector move in X and Y derections.The direction of the effector is controlled by the beige grounded servo motor via two parallelogram mechanisms (blue and jade) and a spur gear drive.Unstable positions of the parallelogram mechanisms are prevented when programming the motors.This video was made based on:youtu.be/pQ_CdrepHeo
Robot arm 1a thang010146 2024-04-05 | The orange end effector can move in the XOY vertical plane. The effector is pivoted at the end of the yellow connecting rod of a parallelogram mechanism (pink, red, yellow and white). The input motions of the red and pink cranks are provided by red and pink grounded servo motors.The direction of the effector is kept unchanged by two parallelogram mechanisms (blue and jade).Unstable positions of the parallelogram mechanisms are prevented when programming the motors.This video was made based on:youtu.be/pQ_CdrepHeoSTEP files of this video:mediafire.com/file/rg08q3e6xn00spj/RobotArm1aSTEP.zip/fileInventor files of this video:mediafire.com/file/bmno5390hi8x97f/RobotArm1aInv.zip/file
Double soft close hinge thang010146 2024-03-30 | This hinge is applied to the toilet seat.The green seat and blue lid are closed by their own weight.During closing, the black springs and helical joints provide increasing torque to prevent the seat and lid from falling rapidly.Orange and red face cams have prismatic joints with the beige axle.The pink nut is used to adjust the spring force.This video is inspired by patent EP 1 486 154 A1
Belt drive 4d thang010146 2024-03-25 | Input: yellow pulley of D1 diameter.Output: pink pulley of D2 diameter. D1 = 2*D2So the output speed is twice the input speed.The input and output shafts are perpendicular to each other.The orange idler pulleys guide the black round belt between the input and output pulleys and prevent the belt from leaving the pulleys.Move the blue pulley bracket up to tension the belt. Use the green bolt to clamp the bracket after adjustment.
Counterbalance hinge 1 thang010146 2024-03-25 | The hinge ensures that- The torque generated by the spring reaches its maximum value when the downward gravitational force of the lid causes maximum torque (in closed position).- The torque generated by the spring reaches its minimum value when the downward gravitational force of the lid causes minimum torque (in vertical position).- The lid is lifted and lowered effortlessly and hold securely in any position if the spring stiffness is properly calculated.STEP files of this video:mediafire.com/file/7rmazf9507quh8q/CounterbalanceHinge1STEP.zip/fileInventor files of this video:mediafire.com/file/qbuy7ad5y7jm644/CounterbalanceHinge1Inv.zip/file
Curved slider crank mechanism thang010146 2024-03-20 | Input: pink crank that performs reciprocating rotation.Yellow curved sliders close and open along a curved runway.Brass connecting rods connect the crank and the sliders by spherical joints having unsplit outer part shown inyoutu.be/KfGUpfkucNM
Yaw and roll rotation thang010146 2024-03-20 | Input: pink bevel gear shaft.Output: Orange bevel gear shaft. It rotates around its own axis and periodically oscillates 90 degrees around the pink input axis.The oscillation occurs in every four revolutions of the input thanks to the timing belt drive and the cam drive of the jade cam and yellow follower.STEP files of this video:mediafire.com/file/9dq0peyy8q3u7i5/YawAndRollRotationSTEP.zip/fileInventor files of this video:mediafire.com/file/fgsm4gn14eohue4/YawAndRollRotationInv.zip/file
Gear train and rack thang010146 2024-03-15 | Input: blue shaft that performs 90-degree rotary oscillation thanks to the blue motor and a 4-bar linkage of the red crank.Output: beige slider with brown rack. The gear train of several gear blocks (pink and yellow) helps to get a large displacement of the output. Increase the number of gear blocks for larger displacements.STEP files of this video:mediafire.com/file/w45n1g4e8jky2x9/GearTrain%2526RackSTEP.zip/fileInventor files of this video:mediafire.com/file/axem8jk8qm9pt2j/GearTrain%2526RackInv.zip/fileCalculation:Number of teeth of the pink gear: ZpNumber of teeth of the yellow gear: ZyComplete number of teeth of the blue gear: ZbD: diameter of the yellow and blue geari: transmission ratio of the gear traini = (Zy/Zp)^nn: number of the gear blocksL: linear travel of the beige sliderL = Pi*D*(90/360)*i In the video:D = 40 mm Zy = Zb = 20Zp = 10n = 3i = (20/10)^3 = 8L = 3.142*40*(90/360)*8 = 251.36 mmIncrease the number of the gear blocks (n) to get larger LFor example, L = 1000 mm if n = 5
Spatial Geneva mechanism 6b thang010146 2024-03-10 | Input: yellow spatial cam.Output: pink shaft of four pins. The output performs intermittent 90-degree rotation.2 revolutions of the input correspond 1 revolution of the output.This video is made based onyoutu.be/IRZ0Xu4SDqg
Spatial Geneva mechanism 6a thang010146 2024-03-10 | Input: spatial cam.Output: shaft of three pins. The output performs intermittent 120-degree rotation.3 revolutions of the input correspond 1 revolution of the output.This video is made based onyoutu.be/IRZ0Xu4SDqg
Machine tool fixture 60b thang010146 2024-03-05 | Input: pink piston.Output: red clamping jaw. It is completely withdrawn from the orange workpiece space when not clamped. Additionally, it can enter the workpiece cavity for clamping.This video is made based on the frog clamp shown atyoutu.be/Y-1rFofQZ_kSTEP files of this video:mediafire.com/file/m2519cm7xbbnifm/MachineToolFixture60bSTEP.zip/fileInventor files of this video:mediafire.com/file/0q72063i4nqcsxr/MachineToolFixture60bInv.zip/file
Bevel gears 8b thang010146 2024-03-05 | Input: blue gear shaft. The number of teeth of the two blue gears is 32 although their diameters are different.Output: yellow and orange shafts. The number of teeth of the two gears is 16 although their diameters are different. They rotate at the same speed and in the same direction.Two white bearings can be rotated thanks to the pink worms. So the bearing position of the output shaft is adjustable.See a simpler case when the output shafts rotate at the same speed and in opposite directions:youtu.be/vOu7oATlsPEInventor files of this video:mediafire.com/file/tdnbvxw89eajlqp/Bevelgears8bInv.zip/file
Bevel gears 8a thang010146 2024-03-05 | Input: blue gear shaft. The number of teeth of the gear is 32.Two grey bearings are stationary.Output: yellow and orange shafts. The number of teeth of the two gears is 16. They rotate at the same speed and in opposite direction.Two white bearings can be rotated thanks to the pink worms. So the bearing position of the output shaft is adjustable.Inventor files of this video:mediafire.com/file/66amjf302kv2cec/Bevelgears8aInv.zip/file
Machine tool fixture 60a thang010146 2024-02-29 | Input: pink piston.Output: green clamping jaw. It is completely withdrawn from the gray workpiece space when not clamped.It is an application of the slider crank mechanism (yellow crank, pink slider and green conrod).
Oblong-shaped tension spring thang010146 2024-02-25 | The yellow screw connects the two ends of the spring together.See the application of this type of spring (minute 0.40):youtu.be/j3SiVPXs7pI
Wedge clamp 2 thang010146 2024-02-25 | 12bcd.mp4 Uploaded on 25/02/2024Turn the yellow screw to push the pink wedge down and make the green jaw move outward to clamp the two orange workpieces at the same time.The blue slider has a threaded hole for the yellow screw.The blue slider can move up/down and along the T-shaped groove of the base.This video was made based on the videoyoutu.be/KgQQdbngyV4
Wedge clamp 1 thang010146 2024-02-25 | Turn the blue screw to push the pink wedge down and clamp the orange workpiece.The pink wedge moves up and down with the blue screw thanks to a small pin (brown) that is fixed on the pink wedge and engages with the blue screw.The jade slider has a threaded hole for the blue screw.The blue slider can move up/down and along the T-shaped groove of the base.This video was made based on the videoyoutu.be/Dw27hDPZ-6E
Motorcycle folding ramp ladder thang010146 2024-02-20 | Yellow and jade bars and pink hinge plates form parallelogram mechanisms. They are rotated around fixed blue hinge plates.I saw this ladder in front of a house in Hanoi on February 16, 2024 and made this video.
Hose quick coupler thang010146 2024-02-20 | Push the blue sliding bush back, insert the blue tube into the yellow tube.The blue tube pushes the red ball out while the pink and brown sticks open the liquid path between the two tubes through the holes of the jade spring bushings.Release the blue sliding bush so that the red balls lock the blue tube.To disconnect the coupler, push the blue bush back, withdraw the blue tube then release the blue bush to keep the red balls in their holes. Two black O-rings pressed by two blue springs and black gasket prevent fluid from leaking.STEP files of this video:mediafire.com/file/leo8e66oh4yg7hz/HoseQuickCouplerSTEP.zip/fileInventor files of this video:mediafire.com/file/i181qdb3ydr8kos/HoseQuickCouplerInv.zip/file
Flapping foil propulsion 3 thang010146 2024-02-15 | This idea belongs to a Dutch captain engineer, Mr. Ernst-Jan de Groot.The magenta arrow indicates the direction of the boat's movement.Input: green shaft.The green worm is fixed to the green shaft.Yellow worm has a prismatic joint with the green shaft.Two blue double cranksets receive motion from the green shaft via worm gear drives and rotate in the same direction.The pink foil has a revolution joint with the violet slider that moves along a vertical runway.Two yellow connecting rods connect the blue cranks to the foil.The angular offset between the blue double cranks determines the angle of attack of the foil.The angle of attack can be adjusted by using the brown screw to move the yellow worm axially as shown in the last scenes of the video. Reversing the input rotation causes the boat to move backward.Inventor files of this video:mediafire.com/file/qmtun46uiw72mxi/FlappingFoilPropulsion3Inv.zip/file
Flapping foil propulsion 2 thang010146 2024-02-15 | This propulsion is used for small boats and is said to be more efficient than a propeller.The magenta arrow indicates the direction of the boat's movement.The blue arrow represents the force exerted by water on the pink foil.The foil moves up and down thanks to an eccentric slider crank mechanism consisting of the input green crankshaft and yellow conrods.Here the slider is replaced with the red roller that rolls along the runway of four rods.Such an arrangement allows the foil to rotate a limited angle thereby creating the angle of attack of the foil. The rectangular protrusions at the lower ends of the conrods determine the value of the attack angle.Reversing the input rotation does not cause the boat to move backward. So use the rudder to get that.Inventor files of this video:mediafire.com/file/6zbls2fhvkmnaks/FlappingFoilPropulsion2Inv.zip/file
Four-wheel car 4b thang010146 2024-02-15 | A rocker (in blue) carrying two wheels is pivoted on each side of the car. The rockers are connected together via a violet arm and two brown connecting rods.This arrangement ensures:- The four wheels always contact the uneven ground.- The car chassis (in yellow) has a definite position, although it is suspended on two coaxial revolution joints.- When rocker 1 is immobile, the oscillating angle of the chassis is a half of the rocker 2 oscillating angle (first scenes of the video).The connecting rods use sphere joints having unsplit outer part shown inhttp://youtu.be/KfGUpfkucNMSee a prototype of this car:youtu.be/hsf21jS3M4Y
Amoeba wheel thang010146 2024-02-10 | This wheel is a combination of 8 Tchebicheff's four-bar linkages youtu.be/xPVcL0fMBCkInput: blue crank shaft.1 revolution of the wheel corresponds to 4 revolutions of the input crankshaft.1 revolution of the wheel corresponds to approximately 8*L linear displacement of the blue crankshaft. L is length of the brown plate.The wheel can roll when the crankshaft is pushed horizontally (red arrow in the video’s last scene).This wheel helps reduce pressure on the ground.Thanks to Arglin Kampling for providing me with the wheel dimensions.See the wheel prototype:youtu.be/Geu_kDHcrLM
Fixing a base on the floor 2 thang010146 2024-02-10 | 4abe.mp4 Uploaded on 10/02/2024Place the round base into the floor hole, turn the red screw to secure the base to the floor.Thanks to the scissor linkages, when turning the red screw, the pink bars come out and touch wall of the hole. Friction will keep the base firmly on the floor.Four threaded holes on the base surface are used to fix other devices.
Fixing a base on the floor 1 thang010146 2024-02-10 | Place the base into the floor hole, turn the screw to secure the base to the floor.Thanks to the oblique surfaces, the blue upper piece and the yellow lower piece are pushed toward wall of the hole in opposite directions. Friction will keep the base firmly on the floor.Four threaded holes on the base surface are used to fix other devices. This design is found on bicycle handlebar stemsyoutu.be/pe3wTSXQa2c
Lock mechanism of a cap thang010146 2024-02-10 | Press the red button to unlock and lift the blue cap to open.Push the cap on the pink pin to lock.The black elastic loop tends to retract the yellow hooks.This video aims to propose a possible mechanism that has the feature shown in videoyoutu.be/9tSaXV5lZFQat 1:31
Flapping foil propulsion 2 thang010146 2024-02-05 | This propulsion is used for small boats.The blue lever oscillates thanks to the green motor and the four-bar mechanism of the red crank and purple connecting rod.The pink foil has two axles. One rotates in the blue bar hole. The other moves in the circular slot of the blue bar.The blue arrow represents the force exerted by water on the pink foil.Such an arrangement allows the foil to rotate a limited angle thereby creating the angle of attack of the foil. The length of the circular slot determines the value of the attack angle.So when the blue lever oscillates, the water pushes the boat forward.Reversing the motor rotation does not cause the boat to move backward. Use the yellow handle to steer the boat. The last shot of the video shows the right turn. However, that only works when the motor rotates.This video was made based onyoutu.be/Mb0uk9d9fsU
Flapping foil propulsion 1 thang010146 2024-01-30 | This propulsion is said to be more efficient than a propeller.The magenta arrow indicates the direction of the boat's movement.The foil moves up down thanks to a slider crank mechanism consisting of the input blue crank shaft and yellow conrods. The crank shaft also carries a second slider crank mechanism consisting of green cranks and a green conrod. The second slider crank mechanism controls the angle of attack of the foil. The angular offset between the blue and green cranks determines the angle of attack of the foil. Reverse input rotation to move backward.This video is made based on the videoyoutu.be/lI9wk3d8I_QInventor files of this video:mediafire.com/file/olm6ghgpffo523y/FlappingFoilPropulsion1Inv.zip/file
Four-wheel car 4a thang010146 2024-01-30 | A rocker (in blue) carrying two wheels is pivoted on each side of the car. The rockers are connected together via a pink arm and two brown connecting rods.This arrangement ensures:- The four wheels always contact the uneven ground.- The car chassis (in yellow) has a definite position, although it is suspended on two coaxial revolution joints.- When rocker 1 is immobile, the oscillating angle of the chassis is a half of the rocker 2 oscillating angle (first scenes of the video).The connecting rods use sphere joints having unsplit outer part shown inhttp://youtu.be/KfGUpfkucNMSee a prototype of this car:youtu.be/tzSqEQOgS4M
Grip and twist 3 thang010146 2024-01-25 | Input: blue gear shaft to which a barrel cam of two grooves is fixed.The blue gear makes the yellow spindle rotate continuously.The front cam groove causes the yellow shaft to move in/out.The rear cam groove controls the in/out movement of the jade circular tooth shaft. The latter helps the pink jaws to grip the candy paper to twist thanks to gear rack drives. The yellow shaft rotates four times faster than the blue shaft.There is a similar device (not shown) on the other side of the candy to twist the other end of the candy.This video is made based on the following video:youtu.be/p2oDyiTDTv4STEP files of this video:mediafire.com/file/10wtczzppvt07gj/GripTwist3STEP.zip/fileInventor files of this video:mediafire.com/file/auk0punaywu494g/GripTwist3Inv.zip/file
Noodle cutting tool thang010146 2024-01-20 | When the knife is raised, it automatically moves to the new cutting path.It occurs thanks to the ratchet mehanism (red pawl, pink ratchet wheel) and helical joint (brown spring pin, yellow helical groove shaft). The green plate spring maintains the contact between the red pawl and the ratchet wheel. The spring force must be small. Otherwise, the ratchet wheel may rotate backwards. Increase the black spring force of the brown pin so that the pink wheel does not rotate in the opposite direction.Pull the brown pin to move the knife quickly to the desired position.Adjust the blue screw for different widths of noodles.It's the solution to get the same functionality of the tool shown in the video (minutes 0.00 – 0.05):youtu.be/rrnbKojGLdcSTEP files of this video:mediafire.com/file/tc5wphvycak4slj/NoodleCuttingToolSTEP.zip/fileInventor files of this video:mediafire.com/file/ony9fen2j0jxe51/NoodleCuttingToolInv.zip/file
Tensegrity structure 2 thang010146 2024-01-20 | It’s an anti-gravity structure. The yellow table frame is suspended by a red center string. Four blue strings maintain the balance of the table.The structure can support a violet weight placed off-center on the table top.This video was made based on youtu.be/1BbGW5mL7QQ
Resizable handle thang010146 2024-01-15 | The handle is covered with a yellow elastic cover (see the last scene of the video).Turn the green screw counterclockwise to extend the green wings.Turn the blue screw counterclockwise to extend the blue wing.The wings are the connecting rods for the yellow and orange rockers of four-bar linkages.The pink or red hub has a revolution joint with the green or blue screw, so they move up down with the screws. The violet bars connect the hubs and the orange rockers. Therefore, the up down movements of the hubs cause the wings and the yellow shell to retract or extend.The force applied to the wings cannot cause them to move thanks to the self-locking feature of the screw joints.This animation was made at the request of an engineer from Czechia.
Fake rolling of three rims thang010146 2024-01-15 | It is a kinetic art.The optical illusion makes it appear that the three rims (painted in plain colors) are rolling on each other. They are actually welded together so there is no rolling happening here (see the last video scene where the rim is painted in a patterned color).This video was made based onyoutu.be/3R-gzln5ufE
Fake motion of a ball thang010146 2024-01-10 | 4ab.mp4 Uploaded on 10/01/2024Optical illusions are used in this kinetic art.The ball, placed in a rotating spiral, gives the impression that it rises or falls depending on the direction of rotation of the spiral.This video was made based on youtu.be/s2mcYErV9D4
Oscillating pin of various strokes thang010146 2024-01-10 | Input: blue cam rotated by the blue handle. Red button is fixed to the leaf spring that maintains the contact between the button and the cam.The cam profile ensures that the red button oscillates up/down with increasing stroke. In this video, the stroke varies from 0.1 to 3.0 mm in 0.1 mm increments per oscillation.This animation was made at the request of a plastic surgeon from Canada.STEP files of this video:mediafire.com/file/pctefajkl215kwr/OscillatingPinVariousStrokesSTEP.zip/fileInventor files of this video:mediafire.com/file/vsea8l80l24rc6n/OscillatingPinVariousStrokesInv.zip/file
Kinetic art with 16 bevel gears thang010146 2024-01-05 | Input: red bevel gear receiving rotation from the green motor.Five yellow and ten beige bevel gears rotate at the same speed.Video is made based on:tiktok.com/@williamdarrellartist/video/7208472809176042757STEP files of this video:mediafire.com/file/y4zngpr6u6pog2c/KineticArt16bevelGearSTEP.zip/fileInventor files of this video:mediafire.com/file/psadtmq8diqowwv/KineticArt16bevelGearInv.zip/file
Reversible seat back thang010146 2024-01-05 | This chair is fixed on the floor.Flip the back to change the chair direction.It is mainly used for vehicle seats.The red bolts and nuts are also used as stoppers.This design ensures the back always tends to reach a vertical position under the effect of gravity (last scene of video).This mechanism is numbered 1601 in the book “1800 Mechanical Movements, Devices and Appliances”, Gardner D. Hiscox, 1921.
