SU1384426A1 - Stepless transmission - Google Patents

Abstract

The invention relates to mechanical engineering, in particular, to mechanisms for varying the rotational speed and transmitted torque, and can be used in transmissions and transmissions of vehicles. The purpose of the invention is to simplify the design and extend the range of infinitely variable rotational frequency and torque on the driven shaft. The transmission includes a housing 1, a leading 2, an intermediate 3 and a shaft, 4 shafts and gears 5, 6, 7 and 14, excitation winding 10 and ferromag

Description

I J + JJU

OST 00 4; ib 4 N9

but

12

nitny powder 18, moreover, the intermediate gear 6 is installed console, partially filled; powder 18, and the intermediate shaft 3 is arranged radially inside it. Excitation winding 10 is L-shaped, placed outside the transmission housing 1 and oriented along the direction of movement of the intermediate shaft 3. The distinctive feature of the transmission is the change in the gear ratio between input 2 and output 4 shafts. 5 з.п, ф-л, 2 Il.

one

The invention relates to mechanical engineering, in particular, to mechanisms for varying the rotational speed and the transmitted torque, and can be used in transmission boxes and vehicles,

The purpose of the invention is to simplify the design and expand the range of stepless speed control and torque on the driven shaft.

FIG. 1 shows the proposed transmission, front view j in FIG. 2, section A-A in FIG. 1,

The stepless transmission consists of the housing 1 (figs, 1 and 2) in which the driving 2, intermediate 3 and driven 4 shafts are installed, the drive gear unit 5 installed with the possibility of axial movement along the splines of the shaft 2, intermediate 6 and driving 7 gears, cup 8, cardan joint 9, excitation windings 10 connected to a power source through switch 11, shaft bearings 12 and intermediate gear bearing 13 6 In addition, reverse gear cog 14 is placed in housing 1 with an external rim intermediate gear 6, gi cylinder 15 with stem 16 connected to glass 8 and guides 17 for moving the glass 8 of the intermediate shaft 3; shaft 3, at the end of the glass 8, facing "to the intermediate gear 6, made up

the point at which the seal 205 is placed, for example, a Mayuket type.

The stepless transfer works as follows.

When the drive gear unit 5 engages, the drive shaft 2 rotating in bearings 12, with intermediate gear 6, housing 1 cantilever mounted in bearing 13, the gear works in the forward direction, with the pinion gear 5, 14 and 6 in the opposite direction. Until

The excitation winding 10 is not energized (switch I1, as in FIGS. 1 and 2) 5 ferromagnetic powder 18 freely rotates with gear kinetic coupling gear Sj of gear 6 and gear 7 is not present, and intermediate 3 and driven 4 shafts do not rotate. power through the switch 11 to the winding 10 of the excitation in the area of the winding is induced magnetic flux,

thanks to which is ferromagnetic. the powder 18 solidifies and links the intermediate gear 6 with the gear 7 of the intermediate shaft 3, therefore the shaft 3, the universal joint 9 and the driven shaft 4 begin to rotate. If gear 7 is in the position shown in FIG. 2 (coaxially with gear 6), the rotational speed To.ee is equal to the rotational speed of intermediate gear 6, and the total gear ratio transmits to the gear ratio of a pair of gears.

5 and 6, i.e. 1d .. 1x equals

g max

at its maximum value, shaft 4 rotates with the lowest frequency. Maximum torque is transmitted.

To increase the rotational speed of the driven shaft 4, the cup 8, together with the intermediate shaft 3 and gear 7, is moved radially along the guides 17 by means of the rod 16 of the hydraulic cylinder 15 (powered from an external source (not shown). the effective radius of the transmission over which the kinematic closure of gears 6 and 7 is carried out (in the extreme position this radius becomes equal) therefore the frequency of rotation of shafts 3 and 4 changes proportionally (increases), the gear ratio transmission becomes 1mmi shenie

P- and with g 5 g „„ „

 min

That, the frequency of rotation of the shaft 4 is equal to the frequency of rotation of the shaft 2

The intermediate shaft 3 can be in any position in the range - J / UOKC, which ensures smooth, stepless control of the rotational speed and torque of the driven shaft 4, the Transmission, in which the ratio M cs / g mission 3-4 is constructively executed

for example, the internal combustion engine commonly used difference between the minimum and maximum numbers of revolutions of the driven shaft,

To transfer the rotation between the pine shafts 3 and 4, when the cup 8 in the guides 17 is in the selected position, a universal joint 9 o is used. The internal cavity of the gear 6 is sealed from the powder eruption 1B

corrugated diaphragm 19 and cuff 20,

The design of the stepless transmission allows it to be used as a clutch when switching on and off the field winding in any position of the intermediate shaft.

Claims (3)

Invention Formula 1, Continuously variable transmission, comprising a housing, a drive shaft, and an intermediate 15 20 25 30 05 40 45 50 commanding element and a driven shaft between which a cavity is formed, filled with ferromagnetic powder, and an excitation winding connected to a power source through a switch, characterized in that, in order to expand the range of infinitely variable rotation frequency and torque on the driven shaft, the intermediate element made in the form of a gear with external and internal gear rims installed in the cantilever housing inside this gear, partially filled with ferromagnetic powder, is arranged with the radial movement of the driven gear, kinematically connected with the driven 1M shaft, and the L-shaped excitation winding is placed outside the body and oriented along the direction of movement of the driven gear f 2, transmission according to claim 1, characterized in that the axle of the driven gear on rolling bearings is installed in a glass, the guides of which are in contact with the radial groove in the transmission housing, 3. Transfer of gears, distinguished by the fact that the end face of the gear wheel is closed by a corrugated elastic diaphragm, in which a hole is made for housing and sealing the glass, 4o PP and 2, that is, that the outer surface of the glass is connected with the rod of the hydraulic cylinder for moving the glass in the guides of the body, 5o Transfer by PP, 1 and 2, about tl with the fact that in / nom to the driven gear the end of the glass is made a bore in which is placed the seal of the sleeve type Bo Transfer in accordance with paragraph 1, clause 1, so that the axis of the driven gear and the driven shaft 1 are connected by a cardan joint. Q3Ut1 15 sixteen