SU564563A1 - Bed for testing shock absorbers - Google Patents

Description

(54) A7 ORTIZER TEST BENCH

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The invention relates to mechanical engineering, in particular to devices for testing vehicle shock absorbers.

Hi BecTeH test bench for shock absorbers, containing a rotary strut, an upper displacing clamp mounted on it for fastening a shock absorber, a recording device, a pressure sensor interacting with the upper clamp: and transmitting pulses to the pick-up device, an oscillating motion actuator consisting of a cam mechanism, gearbox, flywheel and electric motor and lower clamp: to secure the shock absorber l.

The disadvantages of this stand; These include the impossibility of creating and recording simultaneous oscillations of unsprung and sprung masses, as well as simultaneous separate recording of high-frequency and low-frequency working diagrams of the shock absorber, the impossibility of CREATING and 1 GESIRING of damped oscillations of the sprung masses.

The closest to the described device to the described device has a stand for testing shock absorbers, containing a stand mounted on a stand, two oscillating motion drives imitating oscillations of respectively sprung and unsprung masses, dual weight masses placed one above the other levers, between which the shock absorber , one ends of the arms are pivotally connected to the stand, the other end of the upper lever interacts with the drive imitating the oscillations of the sprung masses, and the other end of the bottom of arm - driven simulating vibrations of unsprung mass, the momentum transfer and recording tron devices T2.

The purpose of the invention is the creation and registration of damped oscillations of sprung masses,

Claims (2)

For this purpose, the proposed stand is equipped with a device that disconnects from the interaction with the upper arm a drive simulating the oscillations of the sprung masses, a spring with adjustable rigidity connecting the middle part of the upper arm with the stand, and a damping oscillator that interacts with the masses. The drawing shows the proposed stand, a general view. With the stand 1, the upper arm 2 is pivotally connected, the middle part of which is additionally connected with the stand 1 spring 3, the rigidity of which is adjusted by the screw 4. On the lever 2 there is a mass 5 fixed, connected by a pull 6 with a recording device 7, and roller 8, interacting with an oscillating motion drive imitating oscillations of sprung masses and consisting of an eccentric 9,. mounted on the shaft of the gearbox 10, and the electric motor 11. The actuator is installed on the separating piston-12 with a seal 13. The piston 12 is placed in the housing 14 into which gas or liquid is fed through the aperture 15. The housing 14 is mounted on the frame 16, which, in turn, is mounted on the rack 1. A lever 17 is pivotally connected to which the mass 18 is attached, connected by a link 19 to the recording device 7. The lever 17 is additionally connected to the rack 1 by a spring 20, which is adjusted by a screw 21. At the end of the lever 17, there is a role 22, which interacts with an eccentric 23 of an oscillating drive, imitating oscillations of unsprung masses (not shown). On the lever 17, a pulse transmitter is transmitted to the electric recorders 24 and 25 by a pressure sensor 26. Recorders 24 25 food tons on paper in the frames 27 and 28 of the recording device 29. A shock absorber 30 is installed between the upper lever 2 and the pressure sensor 26 on the lower lever 17. The proposed stand works as follows. When the stand is started up, the motor il, through a gearbox 10 and an eccentric 9, interacting with roller 8, excites oscillations of mass 5 located on lever 2. Simultaneously, oscillations of mass 18 are excited by means of roller 22 interacting with the eccentric 23 of another drive. Forced mass oscillations are written by a recorder. On the device 7, mass 18 oscillations are recorded with the power of the recorder and cable 19. When mass 5 and 18 oscillate, the shock absorber 30 is switched on, with the battery 31 and 32 connected to the ends of the levers 2 and 1 making reciprocating movements. and with the frames 27, 28 and the paper on which the working diagrams of the shock absorber are recorded by the recorders 24 to 25 connected to the sensor. 26, the ordinates of the diagrams are proportional to the strength of the resistance of the shock absorber, and the movements of the diagram are associated with mass oscillations 5 and 18. Damped oscillations are created after the mode: forced: oscillations by disconnecting the eccentric 9 from the roller 8 by reducing the pressure in the cavity of the housing 14, in which the eccentric drive 9 is mounted on the piston 12. Vin1UM 4 adjusts the tightening of the spring 3, as a result of which the natural frequency of the oscillations of the mass 5 changes. Additionally, the adjustment of the natural frequency of the oscillating mass 5 can produce c by changing its value. The invention The stand for testing shock absorbers, containing a rack mounted on a rack are two drives of oscillating motion, imitating the oscillations of, respectively, subregional and nonreproduced masses, two bearing masses and placed one yad other levers, between which an absorber is installed, one ends of the arms are hinged with the stand, the other end of the upper arm interacts with the drive, the imitation of the vibrations of the sprung masses, and the other end of the lower lever with the drive simulating the vibrations of the pulses transmitting and registering devices, differing in the fact that in order to create and register damped oscillations of sprung masses, the stand is equipped with a device that turns off the drive simulating oscillations of the sprung masses from the interaction with the upper arm, connecting the middle part of the upper arm with the stand, and the recording damping oscillations of the device interacting with the masses. Sources of information taken into account in the examination: 1.Certificate of certificate number 159320, cl. GOIM 13/00, 1963 2.A. D. Derbaremdiker, Hydraulic shock absorbers cars. Mechanical Engineering, Moscow, 1969, p. 2O7.