SU1498643A1 - Shifting mechanism for vehicle transmission - Google Patents

Abstract

The invention relates to mechanical engineering and can be used to shift gears in synchronized gear boxes of vehicles. The goal is to increase reliability and simplify the design. The mechanism comprises a housing 1, a gear shift shaft 2 coupled via a lever to the gear shafts forks and two hydraulic cylinders located in a single housing 1 coaxially with the gear shift shaft 2, one of which is designed to rotate the shaft 2 and the other axial movement. The main piston 3 of the axial-displacement hydraulic cylinders is fixedly fixed in its inner diameter to the gearshift shaft 2, and outer-mounted in annular pistons 4 mounted to the outer diameter in housing 1. The rotary sleeve 5 is connected to the gearshift shaft 2 by means of a splined joint has on the inner surface screw splines 7 interacting with screw splines of the fixed sleeve 8 installed in the housing 1. The rotary sleeve 5 is rigidly connected with the piston 9 of the rotation of the gear shaft, which is installed en according to the outer diameter in the floating sleeve 10, the relative axial movement of the piston 9 turning the gear shaft and the floating sleeve 10 is limited by a retaining ring 11. The working cavities A, B, C, D formed by the housing 1, the main piston 3, ring pistons 4 , the rotary sleeve 5, the piston 9 turning the gear shaft and the floating sleeve 10 are connected via distributors 12-15 to the source of pressure of the working fluid and to the drain. By simultaneously connecting the cavities A, B, D with the source of pressure of the working fluid, the gear shift shaft 2 is set to the neutral position, after which the connection in various combinations of the cavities B, C, D with the drain or pressure lines is used to select the appropriate gearbox stem. Transmission activation is achieved by combining cavity A or B with a drain. 1 il.

Description

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Lines 12-15 with a source of pressure of the working fluid and with a drain. By simultaneously connecting the A, B, G cavities with the source of pressure of the working fluid, the gear shift shaft 2 is set to the neutral position, after which the invention relates to transmission control mechanisms, in particular to gear shifting devices in speed synchronized gear boxes of vehicles, and can be used in machine tools and robotics.

The aim of the invention is to simplify the design and increase the reliability of the vehicle's gear shift mechanism.

The drawing shows the mechanism of the gear shift of the vehicle, the cut.

. The gearshift cap of the vehicle includes a housing 1, a gearshift shaft 2, connected via a lever to the gearbox forks, a piston 3 of the gearshift cylinder mounted on the inside gear shaft 2 on the gearshift shaft 2, and on the outer diameter in annular gearboxes. x 4, mounted on the outer diameter in the housing 1. The rotatable sleeve 5 is connected to the wa. Yum 2 transfer; 1 gear with 1 face 6, with 5 on the outer surface. Screws 1PLATES 7, interacting with the sleeve 8 fixedly mounted in the housing I. The turning sleeve 5 is installed but the outer diameter of the non-switching shaft piston 9 connected to it is non-switching shaft in a floating shaft. 10. The axial movement of the piston 9 of the gear shaft to floating, its sleeve 10 is limited to the retaining ring 11. The housing 1, the main piston 3 of the cylinder VK. The gears, ring bridges 4, rotary sleeve 5, piston 9 of rotation of the gear shaft and floating sleeve 10 divide the internal volume mechanism into working sections A, B, C and D connected by a system of channels and distribute. 15 with a pressure source and with a slomo.m, with cavities formed by the main piston 3 of the gearshift cylinder together with the second annular nopini.ieM 4 and the housing 1, as well as with the external noBCpxiiocTbio rotary sleeve 5 together with the inner tip of the pl. the sleeve sleeve 10 and the left end face The gearshifts are combined using channels 16 into a single working cavity B. The operation of the mechanism is carried out in various combinations of cavities B, C, D with the drain or pressure lines by selecting the appropriate gearbox stem. Transmission activation is achieved by connecting cavity A or B with a drain. 1 il.

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It is achieved by various combinations of the connection of the distributors 12-15 with the injection and discharge lines.

The vehicle's gear shift mechanism operates as follows.

The gearbox stem is selected when the gearshift shaft 2 is set to the neutral position, for which the working medium under pressure is fed simultaneously through the valves 12, 13 and 15 in the cavities A, B and G. The main piston 3 of the shift cylinders and the annular pistons 4 occupy the position shown in the drawing and move the gear shift shaft 2 to the neutral position, the floating sleeve 10 occupies the leftmost position, the piston 9 of the gear shift shaft rests on the bottom with the right end sleeves 10. After the shift shaft 2 is set to the neutral position, the flow of the desired gear is selected. A choice of four different gear shift rods is possible.

The pressurized working medium is supplied through the valves 14 and 15 to the working cavities B and G. In this case, the piston 9 rotates the gear shaft, the rotary sleeve 5 associated with it, and the floating sleeve 10 occupy the leftmost position, which corresponds to the choice of the leftmost gearbox rod gears.

The pressurized working medium is supplied through the distributor 14 to the cavity C, and the cavity D is connected to the drain through the distributor 15. In this case, the floating sleeve 10 occupies the extreme right position, and the piston 9 of the rotation of the gear shaft connected to the rotary sleeve 5 abuts against the retaining ring 11, which ensures the selection of the next gearbox stem.

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The pressurized working medium is fed through a distributor 15 to the working cavity D, and the cavity B is connected through the distributor 14 to a drain. At the same time, the floating 101.a sleeve 10 occupies the leftmost position, and the piston 9 of the rotation of the gear shaft connected to the rotary sleeve 5 abuts against the right end of the floating sleeve 10, which ensures the selection of the next gearbox stem.

The pressurized working medium is supplied through the distributor 12 to the cavity B, and the working cavities C and D are connected through the distributors 14 and 15 to the drain. In this case, the floating sleeve 10 and the piston 9 of the rotation of the gear shaft connected to the rotary sleeve 5 occupy the rightmost position, which corresponds to the choice of the rightmost stem of the gearbox, and the gearshift mechanism is installed on the gearbox in such a way that The gearshift shaft selects the highest gear.

When choosing one of the gearbox stems, the rotary sleeve 5 and the gearshift shaft 2 connected to it through a splined connection, due to the interaction of the screw splines 7 of the rotary sleeve 5 with the screw grooves of the fixed sleeve 8 installed in the housing 1, are turned around its axis to corresponding to the selected stock.

Switching on the transmission is achieved by connecting cavity A or B through distributors 12 or 13 with a drain, and returning the gearshift shaft 2 to the neutral position by simultaneously supplying the working fluid under pressure through the control valves 12, 13 and 15 in cavity A , B and G.

Claims (1)

Invention Formula The gearshift mechanism of the vehicle, containing the source of working fluid, hydraulic tank, hydraulic lines, four two-way distributors, each of which has one outlet and two inlets, connected by means of hydraulic lines to the source of working fluid and hydraulic tank, and a housing with a control cavity transmission inlets, a gearshift shaft with a lever adapted to interact with the gearbox stems, an axially shifting hydraulic cylinder of the gearshift shaft, including the main piston fixed on the gearshift shaft and two annular pist0 five 0 n, movably mounted between the housing and the main piston, in which circlips are installed, limiting the movement of annular pistons, hydraulic cylinder of rotation of the gearshift shaft, including retaining ring placed in the housing and a floating sleeve, inside which the circlip is fixed and the piston of rotation of the shaft freely mounted gears, fixedly associated with a rotary sleeve mounted on the splines on the gear shaft with the possibility of axial mixing, and on the outer over Spins of the rotary sleeve are made screw slots, made with the possibility of interaction with the screw slots of the sleeve fixed in the housing, while the first control cavity formed by the main, first annular pistons and the housing is connected through the first inlet and the hydraulic line to the outlet of the first directional valve, second G10 , 1 control, formed by the main ones. 1, the second annular pistons, the rotary sleeve and the housing are connected through the second inlet and 5 hydroline with the outlet of the second hydraulic distributor, the third control cavity formed by the piston of rotation of the shaft of the X-ray, transmission gear and floating sleeve, is connected through the third inlet and hydroline with the outlet of 0 a third valve, a fourth control cavity, .obrazovanna floating sleeve and the housing, is connected via a fourth inlet and the hose to the outlet of the fourth valve, n is the control yulost formed floating rotary sleeve and the sleeve is connected through a fifth hole BfiycK- Noe and the hose with a source of working fluid, from the fact that, in order to increase reliability and simplify the design, the new one. Ms. is equipped with a kana, 1, connecting between the second and fifth stages of the board, n) and in the first position BTOpoix) of the hydraulic and oracle of the second and fifth. Justn connected to the source of the working fluid, and in the irropoii position - from the hydraulic tank. five 0