SU1333878A1 - Power multiposition cylinder - Google Patents

Abstract

The invention of the m. Is used in gear shifting devices in speed synchronized transmissions of vehicles. The purpose of the invention is to simplify the design and increase the reliability of the cylinder. For this, 5 {3 6 II 23 g 19 8 in the main piston 8 of the cylinder are made two axial bores (P) 19 and 20, and the housing 1 is equipped with two hollow cylindrical cylinders 21 and 22 installed with the possibility of interaction with P 19 and 20 and P 23 and 24 ring pistons 11 and 12 of small diameter. Pistons 11 and 12 are installed symmetrically to piston 8, and working cavities 15, 16 and 17, 18, formed on each side of piston 8, are permanently interconnected through a hollow guide 21 and 22. The cylinder ensures that different efforts are made when the gear is engaged, as well as their automatic change. In addition, by simplifying the distribution device, the construction of the cylinder itself is also simplified. 2 Il. If 5 7 291 Zk 12 (L with OQ 00 00 H 00

Description

one

The image relates to mechanical engineering, in particular to gear shifting devices in stepped synchronized transmissions of vehicles.

The purpose of the invention is to simplify the design and maintain reliability.

Figure 1 shows the structural scheme of the cylinder; Fig. 2 shows a static characteristic of a cylinder.

The power multi-position cylinder (Fig. 1) includes a housing 1 with an inner bore 2 forming ledges 3 and 4 and stages 5, 6 and 7 of larger and smaller diameters, the main piston 8, kinematically connected with the gearbox plug 9, and various sizes ring pistons 11, 12 and 13, 14 located on both sides relative to the main piston 8 and interacting with stages 7, 5, 6, respectively, with the main and ring pistons 8 and 11, 12, 13, 14 installed in the housing 1 s the formation of working cavities 15, 16 17 and 18. The main piston 8 is made with two axial bores 19 and 20 and the housing 1 is provided with two hollow cylindrical guides 21 and 22, mounted therein, with vziaimodeyctvi with bores 19 and 20 .The main piston 8 and bores 23 and 24 of annular pistons 11 and 12 of small diameter. The annular pistons 11, 12 and 13j 14 are located symmetrically with respect to the main piston 8, and the working cavities 15, 16 and 17, 18, formed on each side of the main piston 8, are permanently connected to each other through corresponding hollow guides 21 and 22, in which holes are made 25 and 26. Retaining rings 27 and 28 are installed in housing 1, limiting the movement of pistons 11 and 12. A cavity 29 is permanently connected to the internal volume of the gearbox 10.

The device works as follows.

The switching process using an inertial synchronizer, starting from the moment of contact of the friction cones, consists of the following steps: synchronization of the angular velocities of the shaft and gear of the gear to be engaged under the influence of the moment of friction, which occurs due to the synchronizer coupling usi1

ten

15

20

3338782

whether; unlocking the synchronizer by returning the parts of the locking device and the initial position relative to the sliding gear coupling, for which it is necessary to perform a certain work equal to the product of the force applied to the coupling and the length of the path it makes; the process of engagement of the teeth of the sliding clutch with the teeth of the clutch connection of the gear of the gear to be engaged, at the beginning of which it is necessary to overcome the resistance of the synchronizer retainers and the gear selector rod.

Thus, when gearing is switched on at various stages, various thrust points are required: to ensure synchronization, unlock the synchronizer and remove from the clips, greater force is required than to move the synchronizer coupling towards the gear and engage the clutch teeth after the preceding stages have been completed.

To install the main piston 8 into the neutral position, the working medium is simultaneously fed into the working cavities 15, 16, 17, 18 along the guides 21 and 22. In this case, the large-diameter ring pistons 13 and 14 abut against the ledges 3 and 4. The working medium acting the side of the cavity 17 to the main piston 8 from the side of the cavity 18 to the annular piston 12 of small diameter cannot displace the main piston 8 to the left (according to the drawing), since this is counteracted by the force developed when supplying the working medium in cavities 15 and 16, besides displacement to the left of the main piston 8 prevents force from the annular piston 13 of larger diameter, pressed under the influence of working fluid pressure to the annular piston 11 and the small diameter ledge 3.

To install the main piston 8 to the left position, it is necessary to feed the working medium only into the hollow guide 22 and respectively into the working cavities 17 and 18. At the same time, the main piston 8 under the influence of the working medium from the side of the cavity 17 onto the pore 8 and from the side-. the cavity 18 on the piston 12 begins to shift to the left with a force equal to the sum of the efforts of the main piston 8 and the annular piston 12 of small diameter, and the annular piston

thirty

35

40

45

50

55

14 remains stationary, as it interacts with the step 4. After passing a certain distance together with the main piston 8, the annular piston 12 abuts against the retaining ring 28 and stops, its force closes on the housing. 1, and further adjustments of the main piston 8 to the left to the extreme position are carried out only by the action of the working medium on it from the side of the cavity 17.

Thus, the force on the plug 9 when moving it from the neutral position after a certain movement changes in steps (Fig. 2)

To set the main piston 8 to the extreme right position, the working medium is supplied in cavities 15 and 16, while the cylinder works in the same way as when moving to the extreme left position.

The value d (fig, 2) on the static characteristic corresponds to the displacement of elements 11 and 12 from the neutral / negative position before contact with the corresponding stop ring 27 or 28. The value of l is chosen based on the parameters of the nodes of the gearbox 10 on which the power cylinder is installed. For example, synchronizer parameters.

The proposed device allows you to automatically change the force when switching gears, in addition to that

Editor M. Dypyn

0ut. 2

Compiler B, Koval

Tehred L, Serdyukov Proofreader L, Beskyd

Order 3941/32 Circulation 639 Subscription VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab, d, 4/5

Production and printing company, Uzhgorod, Proektna st, 4

878

to simplify the switchgear (not shown), which simplifies the design and increases its reliability.

Claims (1)

Invention Formula Power multiped ion cylinder, comprising a housing with a multistage inner bore, a main piston kinematically associated with a gear shift plug, and differently sized annular pistons located on both sides of the main piston and interacting with the steps of the housing, wherein the main and annular pistons are installed in. housing with the formation of working cavities, characterized in that, in order to simplify the design and increase reliability, the main piston is made with two axial bores, and the housing is equipped with two hollow cylindrical directions, which are installed with the possibility of interaction with the bores of the main piston and annular pistons of small diameter, with annular the pistons are located symmetrically with respect to the main one, and the working bands formed on each side of the main piston are constantly connected to each other through the corresponding hollow guide,