Dynamic test rig for escalator steps

Abstract

The utility model relates to testing equipment, namely to stands intended for dynamic testing of escalator steps. The technical result is an increase in reliability, a decrease in metal consumption and an expansion of the arsenal of technical means. A stand for dynamic testing of escalator steps comprises a U-shaped frame (1) connected to a base (2), a dynamic load source with a drive consisting of an electric motor (3) and a reduction gear in the form of a belt drive (4), the dynamic load source is made in the form of a pneumatic mechanism containing a pneumatic adapter (5), the lever (6) of which is connected to the post of the U-shaped frame (1) with the possibility of vertical movement, and a loading unit (7) rests on the lever (6), to which a jack (8) and a spring (9) are connected, connected to the upper plate of the U-shaped frame (1), an eccentric (10) is installed between the jack (8) and the lever (6) of the pneumatic adapter (5),the pulley of the loading unit (7) is connected to the electric motor (3) via a belt drive (4), the electric motor (3) is mounted on the frame (11) of the loading unit (7), one end of which is connected to the stand of the U-shaped frame (1) with the possibility of vertical movement, and the other end rests on the shaft (12) of the loading unit (7), inside the lever (6) of the pneumatic adapter (5) on the axis a pneumatic tire (13) is fixed, between which and the pressure plate (14) an electronic dynamometer (15) is mounted via a hinge (16), and the equipment (17) for installing the test sample is connected to the base (2). 3 fig.,

Description

[0001] The utility model relates to testing equipment, namely to stands designed for dynamic testing of escalator steps.

[0002] A known design of a rig for dynamic testing of escalator steps includes two parallel inclined supports, a locking clamp and a pressure plate connected to a dynamic load source (Federal Norms and Rules in the Field of Industrial Safety “Safety Rules for Escalators in Subways” dated 03.12.2020, Fig. 5, p. 14).

[0003] The disadvantage of this stand design is its low reliability.

[0004] The closest technical solution to the claimed utility model is a rig for dynamic testing of escalator steps, including two parallel inclined supports and a pressure plate connected to a source of dynamic load, a frame on which all units and mechanisms are fixed, consisting of a base, a post and a console; a crank-slider mechanism fixed to the console with a drive consisting of an electric motor and a reduction gear is used as a source of dynamic load; guide columns are fixed to the console, in which a slider is installed with the possibility of vertical movement and interaction with a spring buffer, which is installed with the possibility of movement in a support sleeve, fixedly fixed in the guide columns; the spring buffer is designed as an overturned and spring-loaded upper cup from below, inserted into the lower cup with the possibility of axial movement when interacting with the slider;the lower cup of the spring buffer is connected to the pressure plate by means of an adjusting bolt secured in the central threaded hole of the pressure plate with the possibility of changing the distance between them by rotating the adjusting bolt; the inclined supports are fixedly secured to the base and are equipped with stops with grooves designed with the possibility of placing the escalator chain rollers in them (BY 11119, G01M7 / 00, 30.08.2016).;

[0005] The disadvantage of this stand design is the high metal consumption and low reliability.

[0006] The objective of the utility model is to create a rig for dynamic testing of escalator steps, which has increased reliability and low metal consumption.

[0007] The technical result is increased reliability, reduced metal consumption and an expanded arsenal of technical means.

[0008] The technical result is achieved in that in a stand for dynamic testing of escalator steps, comprising a base connected to a frame, a pressure plate, a dynamic load source with a drive consisting of an electric motor and a reduction gear, a spring, equipment for installing an escalator step connected to the base, the frame has a U-shape, the dynamic load source is made in the form of a pneumatic mechanism containing a pneumatic adapter, the lever of which is connected to the rack of the U-shaped frame with the possibility of vertical movement, and a loading unit rests on the lever of the pneumatic adapter, to which a jack and a spring are connected, connected to the upper plate of the U-shaped frame, an eccentric is installed between the jack and the lever of the pneumatic adapter, the pulley of the loading unit is connected to the electric motor via a belt drive, and the electric motor is mounted on the frame of the loading unit,one end of which is connected to the stand of the U-shaped frame with the possibility of vertical movement, and the other end rests on the shaft of the loading unit, inside the lever of the pneumatic adapter on the axis a pneumatic tire is fixed, between which and the pressure plate an electronic dynamometer is installed through a hinge.

[0009] The utility model is explained by drawings, where Fig. 1 shows a general view of the stand for dynamic testing of escalator steps, Fig. 2 shows a general view from the side, and Fig. 3 shows view B.

[0010] The escalator step dynamic test stand contains a U-shaped frame 1 connected to a base 2, a dynamic load source with a drive consisting of an electric motor 3 and a reduction gear in the form of a belt drive 4, the dynamic load source is made in the form of a pneumatic mechanism containing a pneumatic adapter 5, the lever 6 of which is connected to the post of the U-shaped frame 1 with the possibility of vertical movement, and a loading unit 7 rests on the lever 6 of the pneumatic adapter 5, connected to a jack 8 and a spring 9, which are connected to the upper plate of the U-shaped frame 1, an eccentric 10 is installed between the jack 8 and the lever 6 of the pneumatic adapter 5 (Fig.3), the pulley of the loading unit 7 is connected to the electric motor 3 via the belt transmission 4, the electric motor 3 is mounted on the frame 11 of the loading unit 7, one end of which is connected to the stand of the U-shaped frame 1 with the possibility of vertical movement, and the other end rests on the shaft 12 of the loading unit 7, inside the lever 6 of the pneumatic adapter 5 on the axis a pneumatic tire 13 is fixed, between which and the pressure plate 14 an electronic dynamometer 15 is installed via a hinge 16, and the equipment 17 for installing the test sample is connected to the base 2.

[0011] The operation of the escalator step test bench is as follows.

[0012] The stand is designed for dynamic testing of escalator steps by applying a single-frequency pulsating load in the required power range in accordance with the Federal Norms and Rules in the Field of Industrial Safety "Safety Rules for Escalators in Subways" dated 03.12.2020.

[0013] An escalator step is installed on the equipment 17, the electric motor 3 is switched on and the loading of the escalator step with a cyclic load is carried out by converting the rotational motion of the shaft 12 of the loading unit 7 with the eccentric 10 into a linear motion.

[0014] Rotation of shaft 12 of loading unit 7 is carried out via belt transmission 4. When rotation of shaft 12 of loading unit 7, lever 6 of pneumatic adapter 5 swings in the stand of side U-shaped frame 1. Pneumatic tire 13 is fixed on lever 6. Adjustment of pressure in pneumatic tire 13 allows changing the amplitude of loading cycle.

[0015] The average load value is adjusted by jack 8. The cycle load value is recorded via electronic dynamometer 15.

[0016] In order to facilitate the installation of the escalator step being tested on the fixture 17, provision is made for lifting the loading unit 7 and the pneumatic adapter 5. The lifting of the loading unit 7 and the pneumatic adapter 5 is carried out using the spring 9. The pneumatic adapter 5 is lifted due to the connection with the loading unit 7. The lifting of the loading unit 7 and the pneumatic adapter 5 is carried out with the jack rod 8 lowered.

[0017] Compared with the prototype, this escalator step dynamic test rig has increased reliability and reduced metal consumption due to the use of a pneumatic mechanism as a dynamic load source.

Claims

A dynamic test rig for escalator steps comprising a base connected to a frame, a pressure plate, a dynamic load source with a drive consisting of an electric motor and a reduction gear, a spring, equipment for installing an escalator step connected to the base, characterized in that the frame has a U-shape, the dynamic load source is made in the form of a pneumatic mechanism containing a pneumatic adapter, the lever of which is connected to the post of the U-shaped frame with the possibility of vertical movement, and a loading unit rests on the lever of the pneumatic adapter, to which a jack and a spring are connected, connected to the upper plate of the U-shaped frame, an eccentric is installed between the jack and the lever of the pneumatic adapter, the pulley of the loading unit is connected to the electric motor via a belt drive, and the electric motor is mounted on the frame of the loading unit, one end of which is connected to the post of the U-shaped frame with the possibility of vertical movement,and the other end rests on the shaft of the loading unit, inside the lever of the pneumatic adapter on the axis a pneumatic tire is fixed, between which and the pressure plate an electronic dynamometer is installed through a hinge.

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