RU2810096C1 - Speed variator - Google Patents

Abstract

FIELD: mechanical engineering.

SUBSTANCE: speed variator contains drive and driven shafts, pins rigidly connected to one of the shafts, and freewheel mechanisms located on the second shaft in the same plane with the curved stages. The fingers are equipped with bushings that form a hinged connection with the fingers, and the outer diameter of the bushings is equal to the diameter of the fingers.

EFFECT: increased reliability of the device, increased smoothness of operation, reduced dynamic loads of the variator, as well as simplified maintenance of the variator.

1 cl, 3 dwg

Description

The invention relates to mechanical engineering, namely to continuously variable transmissions, and can be used in all sectors of the national economy in devices that require a stepless change in speed.

Known speed variator [Pat. 2331002, publ. 10.08.2008., Bulletin. No. 22], containing the drive and driven shafts, fingers rigidly connected to one of the shafts, grips placed along the guide of the other shaft, slides mounted on the grips and interacting with the fingers, springs installed on the slides and interacting with the cylindrical surface of the shaft. The drive and driven shafts are connected by an elastic element, the driven shaft is movably mounted between the transverse axis of symmetry of the drive shaft and the gripper engagement zone.

The disadvantage of this speed variator is the wear of the contact surfaces of the fingers and the rockers, and, as a result, low durability and reliability.

The closest in technical essence and achieved effect is a speed variator, containing drive and driven shafts, pins rigidly connected to one of the shafts, freewheel mechanisms located on the second shaft, and curved scenes installed on each of the freewheel mechanisms in the same plane and interacting with fingers [AC 892059, publ. 12/23/1981, Bulletin. No. 47]. The disadvantage of this speed variator is increased wear of the rubbing surfaces of the fingers and curved links, low durability and reliability.

The technical task is to reduce wear on the rubbing surfaces of the fingers and curved links, increase the smoothness of operation, and increase the durability and reliability of the speed variator.

The technical problem is achieved by the fact that in a speed variator containing drive and driven shafts, pins rigidly connected to one of the shafts, freewheeling mechanisms located on the second shaft in the same plane with curved wings, what is new is that the pins are equipped with bushings that form with pins there is a swivel connection, with the outer diameter of the bushings being equal to the diameter of the pins.

The technical result of the invention is to reduce wear on the rubbing surfaces of the fingers and curved links, increase the smoothness of operation, and increase the durability and reliability of the speed variator.

In fig. Figure 1 shows a speed variator with a coaxial arrangement of the drive and driven shafts, side view; in fig. 2 - section A-A in Fig. 1, in Fig. 3 - remote element B - location of the bushing on the pin.

The speed variator contains a driving shaft 1 and a driven shaft 2, pins 3 rigidly connected to shaft 1, equipped with bushings 4 that form a hinged connection with pins 3, while the outer diameter of bushings 4 is equal to the diameter of pins 3, freewheel mechanisms 5 placed on shaft 2, curved slides 6 installed on each of the freewheel mechanisms 5, fingers 3 are rigidly connected to the shaft 1 by means of levers 7. Bushings 4 are held on the fingers 3 by known methods, for example, using thrust quick-release washers 8.

The speed variator works as follows. The torque during rotation of the drive shaft 1 through the levers 7 with pins 3 equipped with bushings 4, forming a hinge with the pins 3, curved slides 6, freewheel mechanisms 5 is transmitted to the driven shaft 2. When the bushings 4 interact, located on the pins 3 and forming with them hinged connection, with the scenes 6 the process of friction-rolling is carried out, and not friction-sliding, which took place in the prototype. The outer diameter of the bushings 4 is equal to the diameter of the fingers 3, which will not entail any additional design changes to the proposed device. The axial movement of the bushings 4 during the transmission of torque will be prevented by the thrust quick-release washers 8.

The design and use of the proposed device has a number of advantages:

- firstly, due to rolling friction, the wear of the bushings will be insignificant, which will have a positive effect on the strength, and, as a consequence, the reliability of the device;

- secondly, due to rolling friction, the smoothness of operation will increase, dynamic loads will decrease, which will also have a positive effect on the strength, durability and reliability of the device;

- thirdly, due to rolling friction, the wear of the surfaces of the curved slots of the wings will be significantly reduced, which will increase the durability and performance of the device, and, consequently, its reliability;

- fourthly, replacing bushings is easier and cheaper than replacing pins with levers and rockers because in the prototype, in the presence of sliding thorns, they are subject to intense wear during operation.

Claims (1)

A speed variator containing drive and driven shafts, pins rigidly connected to one of the shafts, freewheeling mechanisms located on the second shaft in the same plane with curved wings, characterized in that the pins are equipped with bushings that form a hinged connection with the pins, while the outer The diameter of the bushings is equal to the diameter of the fingers.