SU1575080A1 - Bed for testing hinged joints - Google Patents

Abstract

The invention relates to testing machines and stands, in particular to a stand for testing sliding bearings, for example, construction and road machines. The purpose of the invention is to increase the reliability of the test results and expand the functionality. The bench contains frame 1, pillars 2, supports 3.4 for the pivot pins 17 of the tested bearings, additional supports 5.6 for the sleeves 18 of the tested bearings, as well as the drive mechanism and the loading device. The drive mechanism comprises two crank mechanisms, one of which connects the drive shaft 10 to the supports 3 by means of pivotally connected cranks 11, the connecting rod 12, the rocker arms 15, and the other connects the shaft 10 to the intermediate bearing 5 by means of the crank 13, the connecting rod 14 and the rocker arms 15. The cranks 11, 13 are located at an angle of 180 ° to each other. Such an embodiment of the stand provides simultaneous and multidirectional turns of the supports 3.5, thus providing increased reliability of the test results. The stand provides the ability to change the speed of rotation of the supports due to the gear-variator 9, the ability to change the values of the angles of rotation of the supports by making cranks 11, 13 with holes, the ability to change the ratio of applied axial and radial loads by making a load roller and support 5 with external conical surfaces, as well as the possibility of simultaneous testing of two or more slip holders. 3 hp f-ly, 3 ill.

Description

The invention relates to test machines and stands, in particular for testing sliding bearings of building and road machines.

The purpose of the invention is to increase the observance of test results and the expansion of functional in-systems.

FIG. 1 shows a stand in plan; in fig. 2 - the same, section A-A in FIG. 1; fig. 3, view B in fig. 1. The stand comprises a frame 1 with a stand-2, mounted rotatably with respect to the last supports 3, 4 and intermediate supports 5, 6, as well as a drive mechanism and a loading device. The drive mechanism includes an electric motor 7, a gear 8, a variator 9, a drive shaft 10, a crank 11, a connecting rod 12, as well as an additional crank 13 and a connecting rod 14. The supports 3, 4 are made with rocker arms 15, pivotally interconnected by a rod 16, forming together with the rockers 15 a hinged parallelogram, the rocker 15, connected to the supports 3, is pivotally connected to the connecting rod 12. The intermediate supports 5, 6 are also made to the rocker arms 15, pivotally connected between the rod 16, and the beam 15, connected to the support 5 pivotally connected to For more connecting rod 14.

Additional crank 13 is rotated relative to the curve-pin 11 angle

1801

The sliding bearing under test contains: a hinge pin 17 and a sleeve 18; The fingers 17 are connected to the supports 3, 4 by means of pins 19 The sleeve 18 is connected to the supports 5, 6 by means of dowels (not shown) The loading device contains a loading device 20 including a load clip 21 mounted

0

five

0

five

35

45

50

 . with the possibility of interaction with the supports 5, 6; The outer surface 22 of the loading roller 21 is made conical. The outer surface 23 of the supports 5, 6 is also made conical. The load roller 21 and the supports 5, 6 can be provided with interchangeable clips with external conical surfaces. The cranks 11, 13 are provided with holes 24 located at different distances from the axis of rotation 25,

Stand as follows. The torque from the electric motor 7 is transmitted to the drive shaft 10 through the transmission 8 and the variator 9, which provides a change in the rotational speed. The rotary movement of the drive shaft 10 is converted into reciprocating movements of the supports 3-6 by means of two crank-rocker mechanisms, and the direction of rotation of the supports 5, 6 is opposite to the direction of rotation of the supports 3, 4 due to the mutual rotation of the cranks 11, 13 by an angle of 180 °

To change the angle of rotation of the supports 3-6 change the distance from the axis of rotation of the crank 11 (13) to the axis of the hinged connection of the crank (13) with the connecting rod 12 (14). When these distances are equal, equal angles of rotation are obtained for the supports 3-6 ,

The load N on the test bearings is applied using a loading device 20, such as a press, through the loading roller 21 to the supports 5, 6, i.e. on the sleeves 18.

Since the mating surfaces 22, 23 are tapered, the bearings to be tested are subjected to both a radial load R and an axial load T,

The implementation of the stand with additional support for the sleeve of the test bearing a, and the connection additional

26

24

Aa

20

21

Fig.z

Claims (4)

The claims 2 1, Test bench. compounds containing the frame with rigidly mounted racks on it, drive. a mechanism, a loading device, as well as a support for the hinge pin of the tested sliding bearing, the drive mechanism including an electric motor, gearbox, crank, connecting rod, and the support has a straddle pivotally connected to the connecting rod, characterized in that, p. the purpose of increasing the reliability of the results ^; testing and expanding functionality, it is equipped with an additional connecting rod and crank, as well as an intermediate support for 080 ° of the sleeve of the test bearing, mounted with the possibility of simultaneous and anti-directional rotation relative to the said support, while the additional crank is located at an angle to the said intermediate. the support is also made with a yoke pivotally connected to an additional connecting rod, and the loading device comprises a load roller mounted to interact with the intermediate support. 2. Stand pop. 1, characterized in that, in order to change the angle of rotation of the supports, the cranks are made with holes located at different distances from the axis of their rotation, and the connecting rods are installed with the possibility of connection with any of the holes of the cranks, 3. Stand pop, 1, distinguish-. ' with the fact that, in order to load the bearings under test with an axial load in addition to the radial one, it is equipped with interchangeable cages made with conical outer surfaces; nosti and placed on the load roller and the intermediate cage. 4. Pop stand, characterized in that, in order to increase productivity and stabilize the load, it is equipped with an additional support for the articulated finger and an additional intermediate support for the sleeve of the additional test bearing located parallel to the said bearings and connected to them by means of articulated parallelograms, and the load roller is installed with the possibility of interaction with an additional intermediate support.