SU1642291A1 - Method and device for exciting constant force - Google Patents

Abstract

The invention relates to instrument making and can be used to excite a constant resistive force with a change in the initial deformation of the elastic element moving the silo-transmitting element. The purpose of the invention is to expand the range of excitation of a constant force. The method for exciting a constant force is as follows. The transmitting element receives an external mechanical impact and moves. At the same time, the potential energy of the pre-deformed elastic element is transformed due to the resistance to movement of the force-transmitting element, and the force-transmitting element is additionally loaded with elastic force Rc, which changes as it moves according to the law described in the description of the invention. The magnitude of the impedance resistance force remains constant. The magnitude of the excited constant force is equal to the difference between the elastic force of the previously deformed main elastic element and the elastic force of the previously deformed additional elastic element. An apparatus for carrying out the method comprises a housing 1 with an opening a in the upper part and b in the lower part. A force-transmitting element 2 in the form of a piston with a rod is installed in the hole a, the main elastic element in the form of a spring 3 and the mechanism of the preliminary deformation of the elastic element, namely the nut 4, are screwed into the threaded part of the hole b. A slider 5 is installed in the hole a, an additional elastic element (spring 6) and a nut 7 is screwed into the threaded part of the hole a and is a mechanism of the preliminary deformation of the additional elastic element. 2 sp.f-ly, 1 ill. yy / / Y ///// j (L C o tho N5 O

Description

The invention relates to instrument making and can be used to excite a constant resistive force while changing the initial deformation of the elastic element of the movement of the transmitting element.

The purpose of the invention is to expand the range of excitation of a constant force and expand functionality.

The method for exciting a constant force is as follows.

The transmitting element receives an external mechanical action that moves it. When it is moved, the potential energy of the pre-deformed elastic element is transformed due to the resistance to movement of the force-transmitting element. In this case, the force-transmitting element is additionally loaded with the elastic force of additional elastic elements, which change as it moves according to the law:

Fv Y, (CsXio - CiXi) tg «j,

where Fy is the value of the additional elastic force;

Ci is the rigidity of the additional elastic force;

Xio is the magnitude of the preliminary deformation of the silo exciter of additional elastic force;

X | - the magnitude of the change in the preliminary deformation of the silo of the additional elastic force;

and - the angle, the magnitude of which is greater than or equal to 45 °.

The magnitude of the drag force being excited in moving in both directions of the force-transmitting element, as well as in stopping it in any position of the range of movement of the power-transmitting element remains constant, since the change in its value associated with the change

0

five

0

five

about

35

40

By pre-deforming the elastic element, it is compensated by a change in the additional elastic force. The magnitude of the excited constant force is equal to the difference of the elastic force of the previously deformed main elastic element and the elastic force of the previously deformed force driver of the additional elastic force. This is confirmed by the following calculations.

Initially, the force of resistance to movement of the force-transmitting element without friction forces is equal to

Fconp С0Х- (CiXio + C2Xio) tga 45 °,

where Fconp is the force of resistance to movement of the force-transmitting element;

Co is the stiffness of the main elastic element;

X0 - the value of the preliminary deformation of the main elastic element;

Ct + C2 is the stiffness of the silo with additional elastic force;

Huy - the value of the pre-deformation of the silo extra elastic force.

When moving a force-transmitting element by the value of X in the range of 0 X Hyu V2-1, the force of resistance to movement of the power-sending element is

Fconp СоХо + С0Х - {CiXio + СзХю) - CiXr - CaXi tg a.

Considering that tg a., 10 and

Huyu - Xi

the design of the main elastic element and the force of the additional elastic force, ensuring the equality Co Ci + C2, we obtain

Fconp SoHo + SoHo - SoHyu t; yy- +

Huyu - Xi

+ g xi + x

+ Lo X1.

Huyu - Xi

We transform this equality:

sopr

- wn XQ I

CQ Xi -Co X-X1- Co Hz Hyu - Co Hyu X + Co X1 Hyu + Co Xi X

Hyu-xi

 Oh, X0 4- Ј ° X1 ° (- So Ho - So Huyo C0 Xr - (Ci Huy + C2 Huy) tg 45 °.

The result obtained shows that the drawing shows the device, the recirculated value of the resistive force, the method of exciting the constant displacement of the electric power, the general view.

The element does not change when it is moved. The device for carrying out the method by an arbitrary value X in a limited amount of excitation of a constant force contains

nominal design of the range and allows emkorpus 1, in the upper part of which there is

excite a constant force with a sub-hole a, and in the lower part a hole b.

Vision and moving in any force-apertures a and b - cylindrical and equipped with a transmitting element. They are threaded. In the hole b there is installed a power-transmitting element 2, made in the form of a piston with a rod, the main elastic element in the form of a spring 3 and the mechanism of the preliminary deformation of the elastic element, namely the nut 4, are screwed into the threaded part of the hole b. A spring 3 is placed between the force-transmitting element 2 and the nut 4. A slider 5, an additional elastic element, namely a spring 6, and a nut 7, is screwed into the aperture and screwed into the threaded part of the aperture and is a pre-deformation mechanism of the additional elastic element. A spring 6 is placed between the slider 5 and the nut 7. The slider 5 is connected to the power-supply element 2 of the thrust 8, made in the form of a lanyard, with hinges 9. The force-measuring device 10 is rigidly fixed in the upper part of the body and touches the power-transmitting element 2. The possible movement of the slide 5 perpendicular to the line of possible movement of the transmitting element 2, and making an angle of 45 ° with the line passing through the centers of the hinges 9.

The number of springs 6, sliders 5 and t g 8 can be in the device from one to several. Together, they constitute the force causative agent of elastic force.

Holes a and b provide the possibility of a straight-line movement of the slide 5 and-of the force-transmitting element 2, respectively. The design of the 8 lanyard bar provides the ability to adjust the distance between the centers of the hinges 9. The spring 3 is pre-deformed depending on the magnitude of the excited constant force in the range from 0 to P, which is limited by the spring design, and is kept in this state of force - 4 cutting element 2 and nut 4. The movement of the force-transmitting element 2 is limited to force-measuring devices 10, which serve to measure the magnitude of the excited constant force. The spring 6 is preliminarily deformed by an amount which in V2 is less than the distance between the centers of the hinges 9 and is held in this state by the slider 5 and the nut 7. The design of the springs 3 and 6 ensures 5 the rigidity of the springs 3 and the total rigidity of the springs 6 (in depending on the amount). In case of equal pre-deformation of the main elastic element (spring 3) and additional elastic elements (spring 6), the excitation force is constant and the resistance to movement of the force-transmitting element 2 will be equal to the frictional force in the guides (holes a and b) and the hinges 9. Range excitation of a constant force is determined by the distance between the centers of the hinges 9 and the design of the main elastic element (spring 3) and additional elastic elements (spring 6),

The device works as follows.

In preparing the device for operation, the springs 3 and 6 are pre-deformed by rotating the nuts 4 and 7, respectively. The magnitude of a given constant force is determined by the indications of force-measuring devices 10. Then the force-transmitting element 2 is displaced by an external mechanical force and converts the energy of the previously deformed spring 3 to the force of resistance to the movement of the power-transmitting element 2, which is equal to the induced constant force. At the same time, the force-transmitting element 2 is additionally loaded with a varying elastic force, excited by pre-deformed springs b, which is transmitted through the slider 5, the thrust 8, which ensures the change of force according to the law of tangent. When moving the transmission element 2, the spring 3 is further deformed and the resistance to movement of the transmission element 2 increases. This changes the angle between the line passing through the centers of the hinges 9 and the movement line of the slider 5, the movement of the spring 5 decreases and the preliminary deformation of the spring b decreases. . A decrease in the elastic force induced by the spring 6, the loading, force-transmitting element 2 does not occur due to an increase in the angle between the line passing through the centers of the hinges 9 and the tim slide 5, and respectively the tangent of said angle. On the contrary, an increase in the elastic force occurs, which compensates for the increase in the resistance force and thus maintains a constant value of the excited force.

Claims (2)

1. A method of exciting a constant force, which consists in converting the potential energy of a pre-deformed elastic element due to the resistance to movement of the force-transmitting element under external mechanical action on it, characterized in that, in order to expand the range of excitation of a constant force and expand its functionality, the force-transmitting element load with additional elastic force Fy, which changes as the force-transmitting element moves according to the law Fv Z, (CiXb - CiXi) tgai, where Ci is the stiffness of the force exciter of additional elastic force; X | 0 - the magnitude of the preliminary deformation of the silo of additional elastic force; X | - the magnitude of the change in the preliminary deformation of the silo of the additional elastic force; O5 - angle, the magnitude of which is greater than or equal to 45 °. 2. A device for exciting a constant force, comprising a body with a main elastic element placed therein and a preliminary deformation mechanism for an elastic element associated with a force-transmitting element made with the possibility of rectilinear movement, characterized in that in order to extend the excitation range of a constant five 0 of this force, it is supplied with a force of additional elastic force, made in the form of a thrust rod, a slide connected pivotally to one of its ends, and an additional elastic element with a preliminary deformation mechanism bonded to the slider, while the second end of the thrust joint is connected by means of a hinge with the force-transmitting element, and the slider is made with the possibility of a straight-line movement in the direction perpendicular to the line of movement of the power-transmission element, and a component with a line passing through the hinge centers g 45 °. and the additional elastic element is pre-deformed and made with a rigidity equal to that of the main elastic element, with this pre-deformation value of the additional elastic element in V5T less than the distance between the centers of the hinges.