SU796694A1 - Stand for testing transmission screw-nut transmission by rolling - Google Patents

Description

(54) STAND FOR TESTING TRANSMISSION HIIT-NAKING ROCK

one

The invention relates to mechanical engineering, in particular to testing equipment, and can be used for testing and running in screw-and-nut gear drives.

A test stand for testing gears of a rolling screw comprising a frame, a front headstock with a centering support mounted on a frame that can be moved along the axis of the centering support, a tailstock, a rotating center located along the axis of the centering bearing, designed to fasten one of the ends the screw of the gear under test, the mechanism for loading the latter with axial force and a reversing drive designed to rotate the screws of the gears under test l.

The disadvantage of this stand is that it allows you to experience only one gear screw-nut rolling.

The purpose of the invention is to increase the productivity of the stand.

This goal is achieved by the fact that the centering support is made floating in the axial direction and is intended for fastening the other end of the test gear, the stand is installed on the frame with the possibility of moving along the axis of the centering support by the carriage, and placed in front and tailstocks, respectively, with additional supports designed to fix the screw to another

tested transmission.

Fig. 1 is a schematic diagram of a test stand for screw-and-nut gear drives; in fig. 2 node I, in FIG. one.

The stand contains a bed 1, on which the fore headstock 2 is fixed and with the possibility of moving the headstock 3 and the carriage 4.

The headstock 2 is reversible to rotate the screws 5 and 6 of the tested gears. The drive consists of a thyristor electric drive 7 with a stepless change in the number of revolutions connected via a belt drive 8 with a spindle 10 mounted on bearings 9 on which a replaceable guitar of gear wheels 11 is mounted, backlash-free brake 12 and a support 13, for example, a three-jawed cartridge. Through

the interchangeable guitar of the gear wheels 11 is transmitted to the second spindle 15 mounted on the bearings 14, which is hollowed and equipped with a backlash-free brake 16 and a floating centering support clamping mechanism 17. The hydraulic cylinder rod 19 is equipped with an axial force of screws, which includes Also, the hydraulic cylinder 20 and the reversing spool 21. In the tailstock 3, the bearing center 22 is mounted with the center 24, which is hollow and has a stem 26 of the hydraulic cylinder 20 of the screw loading mechanism 5 with axial force. The tailstock 3 is also provided with a displacement drive, which is an asynchronous motor 27 connected by a belt drive 28 with a lead screw 2.9. The carriage 4 serves to clamp the two nuts 30 and 31 of the tested screw-nut gears, which is mounted on roller supports 32 on the frame and can move along it along rails (not shown in the figures). Limit switches 33 and 34 are installed on frame 1 which can be interchanged depending on the length of the test gear. The floating centering bearing is a rod 35 into which a spring-loaded center 36 is inserted. At the end of the rod 35 a clamping mechanism 17 is fixed, capable of transmitting torque and moving in axial direction together with the rod E5, the Stand works as follows 1. Gear running mode at idle (no load). To do this, before installing the test screw pairs, the tailstock 3 is driven by a displacement drive for the right depending on the length of screws 5 and 6. Screws 5 and 6 are installed in the rotating center 24 and support 25, as well as the center of spindles 10 and 15, nuts 30 and 31 are clamped in the carriage (the clamping mechanism in the figures is not shown). The left ends of the screws 5 and 6 are fixed in the clamping mechanism 17 and the support 13. The tailstock 3 moves to the left until the ends of the screws 5 and 6 are pinched by the end of the tailstock 3. On command from the control system (in the figures shown) includes a thyristor electric drive 7. Rotation through a belt drive 8 and a replaceable guitar of gear wheels 11 is transmitted to spindles 10 and 15, and then to screws 5 and 6. Through a pair of screw-nuts, the movement is transmitted to carriage 4, which moves along the base 1 until the end switch is 33 or 34, otorrhea gives a command to reverse rotation of the drive 7. Then the screws 5 and 6 start to rotate in the reverse direction, the carriage 4 is moved in the other direction. After a specified number of cycles, the control system disables the rotation drive. 2. The mode of measurement of the moment of idling. For this, the nuts 30 and 31 are unfastened from the carriage 4, which is rolled to the side. A measuring system is installed on frame 1 (not shown in the figures). Having rotated the screws 5 and 6 from the drive, first one way and then the other time, the idle time is measured. 3, Run under load mode: The nuts 30 and 31 are clamped in the carriage 4. On command, the thyristor drive 7 is actuated from the control system, as a result of which the screws 5 and 6 begin to rotate and the carriage 4 receives a movement, for example, to the right according to the scheme. At the same time, oil from the reversing spool 21 is supplied to the right hydraulic cylinder 20. The stem 26 of the hydraulic cylinder 20 entering the hollow rotating center 24 presses on the end of the screw 5. The force is transmitted through the screw 5 to the transfer shaft and then to the nut 30 the carriage 4, the force is transmitted to the nut 31 and to the screw 6, through the end of which it is transmitted to the bearings 23. After the end switch 33 is triggered, the reversing slide valve 21 is switched to another position, and to the other end of the screw 5 presses the rod 18 of the hydraulic cylinder 19 - Dit test roller screws 5 and 6 in the other direction. After a specified number of cycles, the control system turns off the stand. 4. Measurement mode axial fluid gear screw-nut, rolling. The rotation drive of screws 5 and 6 is off. The control system includes two backlash-free electromagnetic brakes 12 and 16, preventing possible rotation of screws 5 and 6. Then the stem of one of the hydraulic cylinders i9 or 20 presses on one of the ends of the screw 5. The measuring system (not shown in the figures) is mounted on screws 5 and 6 , measures the movement of screws 5 and 6 relative to nuts 30 and, 31. Then they press on the other end of the screw 5 and measure the movement in the other direction. This stand design allows testing and rolling-in simultaneously two gears of the screw-nut with any cutting direction and thread pitch, and provides running-in without load, under load, and also allows measuring idle torque and axial stiffness without rearrangement of test gears, vylna stand performance.

Claims (1)

Invention Formula A bench for testing gears of a rolling swivel containing a frame, a front headstock with a centering support mounted on it, mounted on a bed with a tailstock that can move along the axis of the centering support, the tailstock, a rotating center located along the centering bearing axis, for attaching one of the screw ends to the test subject transmission mechanism, the latter’s loading with an axial force and a reversing drive designed to rotate the screws of the tested gears, characterized in that The centering support is made floating axially and is intended for fastening21 the other end of the screw on the frame of the subject; gear, the stand is equipped with a carriage mounted on the frame with the ability to move the axis of the centering support, designed to fasten the nuts of the tested gears, and placed in the front and rear headstock, respectively, additional supports, designed to fasten the screw 0 other tested transmission. Sources of information taken into account in the examination of the USSR Copyright Certificate № 416587, cl. G 01, M 13/02, 1972 (prototype).