Torsion spring is a mechanical force storage structure, mainly used in ancient timesCatapultAnd other crossbows.The torsion spring accumulates force and makes use of the torsion or rotation of elastic materials with soft and high toughness, so that the projectile has a certainmechanical energy。
Modern torsion spring torsion bar multipurposeelasticGood steel manufacturing,formThere are also great changes, including hairspring in mechanical watch and toystopThe power spring in the gun also hasTank, torsion bar in the car.
The torsion bar is small in volume and large in torqueMeans of transportationShock absorption oftoolIt can't be better.
Design parameters
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Torsion Spring is the extreme of variable springTorsion springtoDouble torsion springThe deformation of deformed torsion springs and even various torsion bars can be shaped according to the design.
Torsion Spring is one of the most complicated design principles among all spring categories, and the change of type is quite lively, so the theory involved in design is also the most complicated.Therefore, it is difficult to master during design
(2) Control diameter: (a) outer diameter, (b)internal diameter, (c) the inner diameter of the casing, or (d) the outer diameter of the round rod through which it passes.
(3) Wire size "wire diameter".
(4) Material (type and grade).
（5）Torsional force: The number of pounds deflected to a certain angle.
(6) Maxdeflection(The angle calculated from the free position).
(7) The form of the end.
Please specify: material diameter (d), outer diameter (D), torsion arm length (L), free height (Lo), and other geometric dimensions, such as leading moment (T 1 T 2... T j) and corresponding and corresponding torsion angle (Ψ)
Structure principle
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With the development of armor and the emergence of fortifications, the East developed the products made of animal horn, tendon, horn, hardwood, silk and other materialsComposite bowThis is a leaf spring structure, which combines the advantages of a variety of biological materials, making the composite bow powerful. Foreign experiments show that the energy of the composite bow with a pull force of more than ten times smaller is more than 740 poundsarbalest The power is more than twice as high (this is because the energy storage rate of steel is very poor, less than one tenth of the steel angle material. The steel bow itself is very heavy, and a lot of energy is consumed by the bow rather than transferred to the arrow).
The catapult designed by the Greeks is equipped with a solid support. The main beam is placed on the support. Two torsion spring sets are installed on both sides of the front end of the catapult. Each spring set drives oneCrossbowThe end of the crossbow arm is connected with the bow string, and the center of the bow string is a woven mesh bag for containing projectiles.
Production equipment
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The torsion spring is a relatively high-precision spring accessory. The ordinary spring machine used to produce the torsion spring can not meet the processing requirements of 1800 degrees. Generally, the universal spring machine is used to produce the torsion spring at home and abroad. The precision is relatively high. The universal spring can realize the shaping and positioning of different angles and shapes. It is a relatively universal CNC universal machine, full automatic production equipment
Main functions of universal spring machine
A kind of elastic element widely used in spring machine and electronic industry. When the spring is loaded, it can produce largeelastic deformation ，把Mechanical workOr kinetic energy is converted into deformation energy, and after unloading, the deformation of the spring disappears and returns to its original state, transforming the deformation energy into mechanical work or kinetic energy.
Torsion spring
① A spring that controls the movement of a machine, as in an internal-combustion engineValve spring、clutchControl springs in the.
② The spring in the universal spring machine absorbs vibration and impact energy. The universal spring machine, such as the buffer spring under the car and train carriage, and the vibration absorption spring in the coupling, etc.
③ In the universal spring machine, the spring stores and outputs energy as power, such as the clock spring, the spring in the gun, etc.
④ In the universal spring machine, the spring is used as a force measuring element, such as a dynamometerSpring scaleThe ratio of spring load to deformation is calledSpring stiffnessThe greater the stiffness, the harder the spring.
