SU1523437A1 - Connecting head of trailer pneumatic system - Google Patents

Abstract

This invention relates to the automotive industry. The purpose of the invention is to increase reliability by improving the tightness in connection with the head of the gacha. The connecting head consists of a housing 1, an sealing ring 2, a nut 3, a partition 4, a diaphragm 5 containing a locking element 6 with an annular seat 7 blocking the outlet opening in the housing. The peripheral part of the diaphragm is made along a conical surface and contains an annular saddle 9 in contact with the surface of the partition 4. In the saddle 9 there is a recess forming the choke 10 with the surface of the partition 4 that connects the cavities 11 and 12, separated by the diaphragm 5. The ring 2 is made of an elastic, elastic and wear-resistant material and has an annular groove 15, from which radial grooves 16 go to the outer cylindrical surface, with windows 17 of the partition 4 located in front of each of these grooves cavities 12. 2 ill.

Description

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The invention relates to the transport machinery industry, in particular to the.: Coupling components of the pneumatic drive of the brakes of a wheeled vehicle.

The purpose of the invention is to increase reliability by improving the tightness in connection with the head of the gacha.

FIG. 1 shows a connecting head; in fig. 2 - a sealing ring.

The connecting head of the pneumatic system of a vehicle consists of body 1, sealing ring 2, nut 3, partition 4, diaphragm 5 containing a locking element 6 with an annular seat 7 that covers the outlet 8 in cor- lus 1.

The peripheral part of the diaphragm 5 is conical and contains an annular seat 9 in contact with the surface of the partition 4, In the annular

the seat of the peripheral part of the diaphragm is made a recess forming the choke 10 with the surface of the partition 4, which communicates the cavities 11 and 12, separated by the diaphragm 5.

In the central bore, the holes 8 are mounted in the annular groove of the bracket 13, which contains a screw-mounted diaphragm 14, in contact with its peripheral part with the conical surface of the housing 1,

The ring 2 is made of an elastic, elastic and wear-resistant material and has an annular groove 15, from which radial depressions 16 go to the outer cylindrical surface, and opposite each of the depressions 16 there are windows 17 of the partition 4, which are in the diaphragm cavity 12 ,,.

The coupling head is working. following way. .

Compressed air from the connecting head and the impeller enters the cavity t1 and, acting on the diaphragm 5, presses the locking element 6 with the annular seat 7 to the saddle of the outlet 8 of the housing 1.

Compressed air, bending the peripheral part of the diaphragm 5, enters F cavity 12 and further along the pipeline to the distribution devices of the trailer brake system (not shown). At the same time air through ok

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17 of the partition 4 enters the recesses 16 and further into the annular groove 15 of the sealing ring 2, as a result of which, under the action of compressed air, the ring 2, elastically deformed, with its free end surface is self-pressed to the end surface of the sealing ring of the head of the throttle.

When air leaks at low pressure, a pressure drop occurs in the head cavity 11 of the connecting pipe t gaa, which replenishes (equalizes) from the cavity 12 through the throttle 10. Equalizing the pressure through the throttle results in a gap between the cavities 11 and 12 a pressure differential is required to open the outlet opening 8, therefore, the trailer is not braked.

During deceleration, the air pressure in cavity 11 decreases faster and throttle 10 cannot provide pressure equalization on both sides of the diaphragm in a short period of time, therefore pressure is generated in said cavities 11 and 12,

Under the influence of the pressure difference noted, air is released from the trailer main to the atmosphere through the outlet 8.

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The connecting head of the pneumatic system of a trailed vehicle, containing an elastic sealing ring fixed in the housing and a baffle with openings, a diaphragm located between the partition and an outlet, the diaphragm being made with a locking element of the valve covering the outlet, and the cavities separated by the diaphragm, communicated through the throttle, characterized in that, in order to increase reliability by improving the tightness in connection with the head of the ga, at the end of the sealing The ring has an annular groove and radial grooves extending from it to the outer cylindrical surface of the ring, with windows open in the diaphragm cavity opposite each of the grooves in the partition.

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Claims (1)

Claim The connecting head of the pneumatic system of a trailed vehicle, comprising an elastic sealing ring fixed in the housing and a baffle with holes, a diaphragm located between the baffle and the outlet, the diaphragm being made with a valve closure element covering the outlet, and the cavities separated by the Diaphragm are communicated through the throttle characterized in that, in order to increase reliability by improving the tightness in connection with the head of the tractor, in the 'end face of the sealing ring a.vypolnen annular groove and extending from the latter to the outer cylindrical surface of the ring groove recess wherein the front of each of the recesses formed in the partition windows from zadiafragmennuyu po'lost. FIG. 2