SU1564500A1 - Loading device for beds of closed contour - Google Patents

Abstract

The invention relates to mechanical engineering, in particular to testing equipment, and can be used in testing high-speed gears of a rotary motion in a closed loading circuit. The aim of the invention is to provide operation at elevated rotational speeds of the output shafts by eliminating the possibility of rotation of unbalanced masses while maintaining the convenience of tuning to the desired level of load. The rotation of the screw 13, the worm gear 14, shaft 18, wheels 20, 24 and output shaft 16 ensures the spin of the torsion shaft 17 and the creation of the required load in the branches of the circuit and on the gearbox 5. The load is fixed by moving the wheels 20, 19, removing them from engagement, respectively, with the wheel 24 and the first coupling half 22. 2 Il.

Description

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The invention relates to mechanical engineering, in particular to testing equipment, and can be used in testing high-speed gears of a rotary motion in a closed load circuit.

The aim of the invention is to provide operation at elevated rotational speeds of the output shafts by eliminating the possibility of rotation of unbalanced masses while maintaining the convenience of tuning to the desired level of load.

FIG. 1 shows the general scheme of the stand with the loading device installed in a position that provides load in the legs of the stand; in fig. 2 - loading device in the working position for testing.

The stand of the closed circuit contains a base 1 on which the electric motor 2, bench gears 3 and 4, the test gear 5 are fixed kinematically. The bench has a loading device 6. The kinematic connection of the electric motor 2 with the gear 3 is provided by a belt drive 7, and the test gearbox 5 with the gearboxes 3 and 4 - couplings 8 and 9 and cardan shafts 10 and 11. The loading device 6 includes a housing 12 rigidly connected to the base 1, a worm to 13, a worm wheel 14, coaxial output shafts 15 and 16, installed in the building e 12 can be rotated, the first 15 of which are kinematically connected to the gearbox 3, the second shaft 16 is slotted and kinematically connected to the torsion 17. The housing 12 is also rotated and parallel to the output shafts 15 and 16 the splined shaft 18, on which is fixed to the worm gear 14. On the spline shaft 18, two gear wheels 19 and 20 are axially displaced with external teeth connected by a fork 21. The first wheel 19 is rotatably mounted on the shaft 18, and the second one is limited from turning. The first half coupling 22 of the gear coupling is fixed on the shaft 15 and is made with external and internal teeth, the second half coupling 23 is placed on the slots of the second output shaft 16 with the possibility of axial movement and is made with external teeth that have the possibility of engagement with the internal teeth of the first half coupling 22. An additional gear wheel 24 is fixed on the second output shaft 16 and its teeth have the possibility of engagement with the outer teeth of the wheel 20. A limiter 25 is attached to the housing 12, which interacts with the outer teeth of the first tooth of the second wheel 19, having the possibility of engagement with the outer teeth of the first coupling half 22. With the second coupling half 23, an additional

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The plug is 26, and the screw to 13 is pivotally mounted in the housing 12.

Stand with a loading device operates as follows.

In the initial position before the start of the test (Fig. 1), the half coupling 22 and 23 of the gear coupling are disengaged, the gear wheels 19 and 20 are in the extreme right position. In this case, the wheel 19 is engaged at the same time as the outer teeth of the first coupling half 22 and with the stop 25, thereby locking the shaft 15 against rotation, and the wheel 20 is engaged with the additional wheel 24.

The gearbox 5 under test is mounted on the basis of 1 stand and is connected via sleeves 8 and 9 to bench gears 3 and 4. When the worm 13 rotates, the torque through the worm gear 14, shaft 18, wheels 20 and 24 and shaft 16 is transmitted to the torsion bar. shaft 17, twisting it and thereby loading the contour branches and the gear 5 under test with the necessary torque. Then the coupling half 23 is moved using a fork 26 to the left, putting it in engagement with the coupling half 22.

The wheels 20 and 19 are moved with the help of a fork 21 to the left, their withdrawal, respectively, from engagement with the wheel 24 by the outer teeth of the coupling half 22 (Fig. 2).

When the motor 2 is turned on, the rotation is transmitted along the branches of the closed power circuit to the gearbox 5 under test, ensuring that it is tested with the loading moment established. To change the magnitude or direction of the loading moment, the electric motor 2 is stopped, the wheels 20 and 19 are engaged with the wheel 24 and half coupling 22, the half coupling 23 is disengaged from the coupling half 22 and, turning the worm towards 13 in the required direction, change the loading moment. After completing the tests of the gearbox 5 and carrying out the necessary control checks by rotating the screw 13, the torsion shaft 17 is unwound, thereby removing the load from the branches of the circuit and the gearbox 5 under test, after which the gearbox 5 is removed from the stand.

The use of the proposed loading device allows testing gears in the stands of a closed loop in a wide range of speeds by eliminating the possibility of rotation of the device elements eccentrically mounted with respect to coaxial output shafts.

Claims (1)

Invention Formula A loading device to the stands of a closed loop, comprising a housing, designed for connecting to the branches of the loop, coaxial output shafts, the first of which is rotatably mounted in the housing, and a primary gear, characterized in that, to ensure operation at elevated speeds rotation of the output shafts, the second output shaft is rotatably mounted in the housing and is slotted, the device is equipped with a schlintsev shaft mounted in the housing for rotatable and a pair of output shafts the worm gear of the worm gear is placed on the spline shaft with the possibility of axial movement by two gear wheels with external teeth, the first of which is mounted for rotation, by a gear coupling, the first coupling half is fixed on the first output shaft and made with external and internal LI, the second is placed on the slots in the opposite direction. th output shaft with the possibility of. movement and is made with teeth outside of them having possibly: engagement with internal teeth of the first. a half coupling fixed on the second output shaft by an additional gear wheel, the teeth of which have the possibility of engagement with the outer teeth of the second gear, and a limiter attached to the housing interacting with the teeth of the first gear that have the possibility of engagement with the external teeth of the first half coupling, the worm The worm gear is pivotally mounted in the housing, and the latter is intended for tight communication with the stand base. / J Fig 2