SU1226110A1 - Chain gearing test bed - Google Patents

Abstract

The invention relates to a test apparatus, namely, test stands for testing drive chains. The purpose of the invention is to improve the performance and approximation of the test conditions to the operational by additional cyclic loading of closed chain loops. The test stand for transmission chains contains a frame, an actuator, drive and driven sprockets, a loading device, is spherically connected to the base of a two-arm lever, at one end of which there are driven sprockets, and on the other a vibrator, kinematically connected with an additional drive. In order to increase ease of maintenance, the stand vibrator is made in the form of discs with holes in which unbalanced weights are placed, and the kinematic connection is a flexible torsion wake. During the operation of the stand, the vibrator associated with the additional drive creates a pulsating load in closed chain loops, the value of which depends on the frequency of rotation of the vibrator and the mass of the unbalance weights placed in it. To create identical test conditions for the circuits and uniform wear of the drive and driven sprockets, the drive is periodically reversed by a command from the time relay. 1 hp f-ly, 5 ill. I (L

Description

The invention relates to mechanical engineering, in particular to testing equipment, and can be used for bench testing of circuits.

The purpose of the invention is to increase the performance j approximating the test conditions to the operational ones due to the additional cyclic loading and increasing the ease of maintenance.

FIG. 1 shows a stand, about-. general view; in fig. 2 is a view A of FIG.

in fig. 3 shows a section BB in FIG. IV

one;

on

on

FIG. 4 shows a section B-B in FIG. one; FIG. 5 is a section of YYD in FIG. four.

The stand contains frame 1, drive 2, drive 3 and driven 4 sprockets, designed to cover them with test chains 5, a loading device including a spring 6, nuts 7 and 8, sliding keys 9, a sleeve 10 and fixing cup P. Driven sprockets 4 are mounted on shafts 12 and 13 of the two shoulders of the lever 14 pivotally connected to the bed 1. At the second end of the lever 14 there is a vibrator made in the form of discs 15 with holes. in which unbalanced weights 16 are placed. The vibrator with the help of a flexible torsion roller 17 is kinematically connected with an additional drive 18 mounted on the frame 1. The stand can be equipped with a device for measuring efforts in the tested chains 5, including the elastic beam 19, mounted on the base 1, and the indicator 20, the stand also contains protective covers 21 and a device 22 for supplying various suspensions to the test chains.

The stand works as follows

By turning the nut 7, the plug 10 is distilled to the extreme right position, the nut 8 is also in the extreme right position, and the spring 6 is in the free state. SRI. The drive 3 and follower 4 starters put the tested chains 5. The nut 7 is distilled to the extreme left position, by rotating the nut 8, I compress the spring 6, which moves the sleeve 10. The keys 9, moving along the screw grooves of the shafts 12 and 13, unfold them one with respect to the other, thereby creating tension on the chains 5. The angle of inclination of the grooves in shafts 12 and 13 is fulfilled from the condition of self-locking. Chain tensioning force

five

5 control the deflection of the beam 19 with the help indicator 20.

After the required tensile force has been created in chains 5, the actuator 2 is switched on for a short time to select gaps in the links of the chains 5, then the actuator 2 is disconnected, checked and, if necessary, by rotation of the nut 8, the tensile force in chains 5 is controlled on indicator 20.

A suspension supply device 22 to the test circuit 6, an actuator 2 and an additional actuator 18, kinematically associated with a vibrator, the unbalanced groups of which are designed to create a cyclic component at a given rotation frequency in the test circuits 5, is switched on. The pulsating load force can be measured force control in chains 5 with, for example, strain gauges, and the stretching of chains 5 and the testing process is compensated by the elasticity

5 compressed spring 6 and, if necessary, periodically adjusted.

In order to create identical test conditions for the circuits 5 and uniform wear of the driven 3 and the driven 4 sprocket, the drive 2 is periodically reversed by a command from the time relay. In order to ensure the safety of the work, the test circuits 5 are placed in protective covers 21, which prevent the spraying of suspensions from splashing and can also fulfill the role of an oil bath.

Claims (1)

1. A test stand for chain transmissions comprising a frame, an actuator, driving and driven sprockets, designed to cover them with test chains, a loading device pivotally connected to the two-arm lever frame, at one end of which there are driven sprockets, characterized in that in order to increase productivity and bring the test conditions closer to operational ones, due to additional cyclic loading, it is equipped with a vibrator installed at the other end of the lever, and kinematically associated with it will add single drive. 2, Stand under item 1, (R u and with the fact that. about tl and h and - with the purpose of raising 31126110.4 ease of maintenance, vibration-balanced weights, and the kinematic ration made in the form of discs with an elbow is a flexible turnout in which the dosing roller is placed. Fig2 UU-X U. V7 / J l Fig.Z Yu Compiled by O. Klimov Editor A. Kozoriz Tehred L. Oleinik Proofreader V. Sinitska , - - ™ - t ----.. ----.-.-.-.- .- ----- ------- --- - - - -. - - - - - - Order 2113/31 Circulation 778 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4 .five