SU1699825A1 - Remote gearshift device for transportation vehicle - Google Patents

Abstract

The invention relates to a transport engineering, primarily to systems for commanding and automatic shifting of gears of vehicles with mechanical manual transmission. The purpose of the invention is to increase the reliability of the device in operation by continuously changing the force of engaging gears. The device contains an automatically controlled choke in the form of a spring-loaded spool 16c bore, pneumatically connected to the working cavities of the expelling mechanism 1 para 173 172727 10 consecutively Figure 11

Description

switching gears through the distributor and kinematically interacting through double-arm lever 11, mounted on the rod 5 of mechanism 1, with HÜEOD: COM shift gears 12, Vilks installed on the rod 13 with the possibility of relative angular peromeshchenm groove 15, made along the arc of a circle. When power is supplied to a corresponding elastromagnet (for example, 22), one of the cavities of mechanism 1 (power cylinder) is connected to the atmosphere through the juice of spool 16. The rod 5 and the plug 12 connected to it begin to move in the axial direction. Moving vmlk / i 12 in the same direction as the cause of the phenomenon of momentum between

the ends of the fork and the rotating synchronizer coupling, which leads to an angular movement of the fork 12 relative to the rod 13 due to the presence of a through groove 15. The movement of the fork leads to a vertical movement relative to the stem 5 of the two shoulders lever 11 and the axial movement of the spool 16 associated with it. the spool 15 is possible under the condition that the moment of rubbing of the fork and the synchronizer coupling is greater than the spring force 18. Moving the spool 16 increases the flow area, which contributes to the rapid emptying of the power cylinder cavity communicated with the atmosphere feroy and increased force transmission incorporation. 4 il.

The invention relates to transport engineering, primarily to systems for the command and automatic switching of perchdach in auto-mechanical transmissions.

The purpose of the invention is to increase the reliability of the operation of the device by infinitely variable change, or the inclusion of gears,

Figs, noxdoaiia lmpdialms electropneumatic circuit device; Fig. 2 illustrates the arrangement of the shift cylinder (about the neutral position) and its solidarity with the gearbox and the distributor; LN. C - section aa in figure 2; on fzh.4 - section bb ng fig.Z.

The device consists of an actuator 1 and distributors 2 interconnected by an air duct system 3. The actuator is a pneumatic neutral cylinder with a pneumatic cylinder, which is made inside the housing 4, rigidly installed in the shell 4. 5 pistons 6 and floating pistons 7,

The axial movement of the pistons is limited by bores in the housing and the roof. 8, which serve simultaneously for supplying pressurized air and its release from the working cavities V and T through the air ducts Ј and 10. On the rod 5, the lever 11 is rigidly mounted in the axial direction. with a fork of the 12th transaxle 1 gear, secured in the opposite direction with retaining rings and bolts on the rod 13 installed in the crankcase or gearbox cover 14. The plug has the possibility of limited movement relative to the rod 13 due to the presence in it of a through groove 15, made along an arc of a circle. In the case of the power cylinder 4 there is a stepped slide valve of 16 throttles, which on one side has a throttled juice to allow air into the atmosphere from the working cavities of the power cylinder through the air duct 17,

The middle (neutral) position of the throttle valve is provided by a spring 18, washers 19 and a lid 20. In this

The position of the throttle bore is minimal. The spool 16 kinematically interacts with double-arm lever 11 through the spike,

The electro-pneumatic distributor. Consists of electromagnets 21 and 22 with a pusher 23, a housing 24 in which a valve 25 and a spring 26 are installed. Air is supplied under pressure through an air duct 27 connected to the cover 28,

The device works as follows.

Starting position (neutral in the gearbox).

To ensure the initial position, the air under pressure through the air ducts 9, 10 and 27 (with the distributor electromagnets de-energized) freely flows into the working cavities C and G

cylinder and blocks the pistons 6 and 7 on the housing 4, thereby installing the lever 11,

the rod 5 and its associated fork 12 gearbox in neutral position.

The inclusion of the transfer.

When power is supplied to the corresponding electromagnet (for example; 22), the valve 23 moves the valve 25 until it stops in the saddle of the cover 28 and blocks the supply of compressed air through the air duct 27 to the working cavity B of the power cylinder. At the same time, the valve 25 will move away from the saddle of the housing 24, connecting the working cavity B of the power cylinder 4 to the atmosphere through the air ducts 10 and 17 and the spool valve 16 juice. Due to the decrease in pressure in the cavity B, the stem 5 and the plug 12 connected to it through the lever 11 moves toward cavity B under the influence of existing pressure in cavity G. The displacement of the plug 12 in the axial direction causes a moment of friction between the ends of the fork and the rotating synchronizer coupling, resulting in an angular movement of the plug 12 relative to the rod 13 (due to presence in it through the slot 15). The direction of movement of the plug 12 relative to the rod 13 depends on the ratio of the angular velocities of the driven and driving parts of the synchronizer, i.e. against the need to accelerate or brake the driven elements of the gearbox. The movement of the fork leads to rotation relative to the stem 5 of the two shoulders lever 11 and the axial movement of the spool 16 associated with it. Displacement of the spool 16 is possible under the condition that the moment of friction between the fork and the synchronizer coupling is greater than spring 18. Moving the spool 16 increases the throttle flow area, which contributes rapid emptying of the cavity B of the power cylinder and an increase in the force of switching in front.

Thus, the movement of the throttle valve 16 is determined by the moment of friction between the thread 12 and the synchronizer coupling, the value of which is variable along the gearshift rod. The greatest value of the force on the plug of the gearbox and, therefore, the moment of friction takes place at the initial moment of the turn-on cycle (unlocking of the switch-on stem, acceleration of inertial masses), then the force decreases and is determined by the difference in rotation frequencies of the synchronized elements in the gearbox, and in the final stage (engagement of the gear coupling) the force reaches a minimum value. Reducing the moment of friction leads to

returning the valve of the throttle 1b under deist - ay of the spring 18 to the position increasing the throttling of the air and, accordingly, reducing the force of switching on the seagull. This ensures that the follow-up action of force variation on the selector rod is dependent on the resistance of the transmission synchronizer.

10 Shutting down the transmission.

When power is removed from the electromagnet of 22 k., The valve 25 is returned to the starting position under the action of air pressure and the spring 26, closing the message

5 cavity B of the power cylinder with the atmosphere by landing the valve 25 on the saddle of the housing 24 and the connection of the specified cavity with the injection pressure meter. When compressed air is fed into the cavity B, the piston rod 5 of the power cylinder, together with the pistons 6 and 7, returns to its original position, thereby setting kinematically connected to the rod 5 via the lever 11 12 and switching rod 13 to the neutral position

5 gears.

The device works in a similar way when turning on the electromagnet 21, ensuring the inclusion of another transmission.

Claims (1)

Invention Formula 0The remote gearbox is switched on: / of the vehicle gearbox containing the cylinder of the kinematically associated with the gearshift rod, and the working cavities of which 5 through two-position electro-pneumatic distribution in one of the positions with the source of working medium under pressure, and in the other with the atmosphere, a double lever is mounted on the rod of the power pneumatic cylinder with the ability of the first arm to interact with the gear leash mounted on the rod, characterized in that, in order to increase the reliability of the device by means of a stepless change in the force of gear insertion, it contains an automatically controlled choke, made in the form of a a non-southerly zoopik with a skim, pneumatically connected with the working cavities of the power pneumatic cylinder through an electric pneumatic distributor and placed with the possibility of its protrusion interacting with the second arm of the two shoulders 5 wherein the leash of the shift plug comprises a through-shaped groove, by means of which it is placed on the shaft of the shift fork / L -% -G3-IX J -0 72 FIG. one 2j IS 23 25 Editor E. Papp rtJiisb Compiled by A. Barykov Tehred M. Morgental .2 Proofreader A.Osaulenko