CN86209746U - Clearance adjuster for overrunning brake-shoe (2,3 type) - Google Patents

Abstract

The utility model discloses an automatic clearance adjuster for overrunning brake-shoe which is used for railway passenger and freight vehicle. The automatic clearance adjuster for overrunning brake-shoe is a structure assembly which is formed by the assembly of a single direction brake adjuster, a rubber sheath, etc. The single direction brake adjuster can restrict the adjusting dose, and a punching limit sleeve and a main spring seat with a locking function are designed to form the light product of the II, IV type. The utility model can be installed on the various passenger and freight vehicle, and the utility model can be installed on a middle connecting rod (II type) or can be installed on a top draw rod (IV type).

Description

Clearance adjuster for overrunning brake-shoe (2,3 type)

The utility model is the non-self-locking thread formula unidirectional action brake block clearance automatic-adjusting device (be called for short unidirectional lock and transfer device) on the rolling stock, belong in the same series of products of application for a patent for invention " 86104654 ", transfer the textural association of device and rubber sheath etc. by the improved lock that can limit adjustment amount itself, and set up the punching press stop collar and the II, the IV type lightweight product that constitute.Can be used on various passenger-cargo vehicle, and in the middle of can being contained on union lever place (being the II type) or the top rod (being the IV type).

Application for a patent for invention " 86104654 " lock transfers device itself not limit adjustment amount, simple in structure, gently little, particular performances is arranged, but need general control lever control by the control lever or the big control ratio of variable control ratio, to being used to replace the vehicle that two-way lock is transferred device has been housed, can not have directly exchanged, still undesirable.

Though the unidirectional lock of № 5745 types of the Soviet Union transfers device that preferable performance is arranged, but its sleeve body and position limiting structure thereof are bad, and manufacturability is also poor, make guiding nut very long, thereby have to strengthen diameter and its bearing diameter of guiding nut, cause whole lock to transfer the diameter of device and length to increase.Because its pillar structure is very long, can not directly be contained on the middle union lever of the existing principal mode lorry of China again.

Alleviate lock and transfer the amount of thinking highly of to alleviate operating vibration, just can prevent bent screws, and can correspondingly reduce the main spring power of locking of relying, thereby also can raise the efficiency.Lock transfers the brake shoe on the device lorry that also helps not having restoring spring in light weight to reset in addition.

The utility model is a kind of combination of structure.Its basic functional principle ties up to lock and transfers restriction adjustment amount in the body, the part of restriction adjustment amount is a blanked part---the stop collar that is contained on the sleeve body, this just can reduce the length of guiding nut, thereby also can reduce the diameter of bearing, even strengthen under the situation of screw diameter, still can make whole lock transfer the diameter of device all to reduce to 80mm from 89mm in order to be used on the middle brace rod.Owing to be contained on the middle brace rod, rubber bellows set and the first-class textural association means of pull bar in the patent application " 86104654 " have been used simultaneously, shortened greatly length (the II type comprise two drawhead length be about Soviet Union's lock transfer device do not comprise drawhead length 1/2), and alleviated weight.Also improved simultaneously structural machinability.Owing to can be contained in the middle brace rod place, directly replace middle brace rod, thus easy for installation, two level braking levers can be operated in the rational pivot angle.

This lock transfers the structure of device to see accompanying drawing 1.Form by following parts:

Press-fiting bonnet (19) on housing (10) the right; Adorning J RunddichtringO (18) and supporting sleeve (20) in the bonnet hole.Left end is screwed with protecgulum (5).Protecgulum (5) outside dress is set about disc mechanism (6), the clamping of its clip double as rubber sheath (4).Adorning the slip ring (2) that band heads straight for mouth in the hole of rubber sheath left end, so that relatively rotate and seal with screw rod (13).The usefulness that the reference disk of outer end (3) is held concurrently and sealed and measure spiro rod length.

Sleeve body (9) is housed in housing, on its left end rim of the mouth with screw (8) fastening the stop collar (7) of a blanked part, the guiding nut (26) and the guiding nut spring (27) of band thrust bearing (28) are arranged in the stop collar.Adjustment nut (25), spring (22), spring-loaded (23) and pull bar (21) that band thrust bearing (24) are arranged in the sleeve body (9).The sleeve right-hand member is screwed into socket cover (11), and locks with pin (12).The taper hole of socket cover matches with the conical surface of pull bar (21) termination and locks.

Main spring (14) also is housed in the housing, two ends are enclosed within respectively on the cone of socket cover (11) and bonnet (19) and lock, and sleeve body pressed to left end together with guiding nut, the guiding nut left end is entered in the taper hole of protecgulum (5), and and adjustment nut be locked together.

Screw rod (13) is in left end is screwed into guiding nut and adjustment nut, and the screw rod right-hand member also is equipped with anti-the press-offing (15) that locks with pin (16).

II type lock transfers the drawhead I (1) at device two ends can directly be connected with the level braking lever with drawhead II (17).

The housing (10) that this lock transfers the good structural machinability of device part to be to adopt the solid drawn pipe wall not process; Have the technological short rod of few chipless machining (21), sleeve body (9), anti-press-off (16) and pillar first-class.And make the vital parts universalization of four types.

In order not change existing car brakeing lever, the control lever construction that is contained in the middle brace rod place is seen accompanying drawing 2, is made up of following part.

At the C of level braking lever point place, be connected control lever (33) with (38) by pin (36), nut (35), thereby making its length little, in light weight, and can obtain big control ratio.Level braking lever is too much when preventing release of brake is flapped toward brake cylinder, cause lock to transfer device and the outer garden of brake cylinder flange to collide, respectively adorn the cover (37) that rolls at the upper and lower sides that pin (36) is positioned at the level braking lever, rely on the vehicle original carriage and set up an angle bar (34) and limited.If after (dress II type lock is transferred device on new car, can consider suitably to extend the level braking lever and do not need to roll cover (37) and angle bar (34)) control lever other end stretches in the oblong aperture of back plate (39).K point place is by in succession control lever (32) and be enclosed within control stalk head (31) on the pull bar of pin in the middle of the control lever.

II, the unidirectional lock of IV type transfer the action of device itself as follows:

Glancing impact, sleeve body (9) the e distance that moves right earlier, in its conical surface place, left side and adjustment nut (25) locking, the boss of while guiding nut and the distance of stop collar (7) inner end surface have also been dwindled e, become f=d-e.Adjustment nut drives screw rod (13) and moves right together subsequently, to brake shoe by last wheel, control stalk head (31) is also transferred the device aft end face by brake application.

If continuous full application of brake because of having maximum elastic deformation, by the control of control stalk head (31), throws off guiding nut (26) left end and protecgulum (5) conical surface.Under the effect of spring (27), guiding nut (26) is screwed into screw rod (13), because the restriction of restricted cover, for the II type, the amount that is screwed into mostly is f=d-e=6～8mm most.Later on much no matter be that the brake shoe abrasion or the amount of elastic deformation have, guiding nut can only move right together and can not rotate on screw rod with sleeve body and screw rod.During alleviation, the adjustment nut left side also is screwed into the identical amount of f=d-e to the right after throwing off with the locking of the sleeve body conical surface under the effect of spring (22), make lock transfer device to shorten.The amount that lock accent device shortens in once braking is subjected to the restriction of stop collar, is equivalent to brake clearance during for II type maximum and reduces about 1.1～1.48mm, near the once maximum abrasion loss of brake shoe.

If after the full application of brake is graduated application, because of elastic deformation less, lock transfers device not adjust, the abrasion of brake shoe then can be offset the brake clearance that has reduced partially, make the original brake clearance of further recovery or the gap is slightly increased, next time no matter be graduated application or full application of brake, all can turn the gap again down, mostly be most 1.1～1.48mm, so hocket, with the more stable brake clearance of basic maintenance.

This lock transfers device (IV type) also can be contained on the top rod, directly replaces the two-way lock accent device of having adorned on the lorry with " exchange type " that the screw rod polished rod partly extends, and need not change other control and coupling.When on new car, being contained on the top rod, then can be without " the exchange type " of screw rod lengthening, and with the standard form of lacking.The screw rod lengthening, being locked partly, weight does not increase the influence no change of vibration to locking.

The unidirectional lock that is contained on the top rod transfers the protecgulum left end of device (IV type) that general pillar replacement rubber sheath is housed.The diameter of its pillar, pillar head, seal ring and back-up ring etc. transfer device general with the two-way lock of STI-600 type.

Claims (7)

1, a kind of one-way hem-shoe clearance adjuster, form by housing [10], protecgulum [5], sleeve body [9], stop collar [7], guiding nut [26], adjustment nut [25], pull bar [21] and screw rod [13] etc., it is characterized in that transferring device, comprise the lightweight construction combination that rubber sheath [4], drawhead [1], [17] and stop collar [7] etc. are formed by the lock that itself does not limit adjustment amount.Can directly be contained in and replace middle brace rod (II type) on the two level braking levers, its modification (IV) also can be contained on the top rod.

2, according to the brake slack adjuster of claim 1 regulation, it is characterized in that, be fixed on sleeve body (9) and go up whole stop collar cylindrical shell of replacement and sleeve protecgulum thereof with stamping forming stop collar (7).

3, transfer device (II type) according to the lock of claim 1 regulation, the pull bar (21) of it is characterized in that having rubber sheath (4), setting stick mechanism (6), drawhead (7), (17), no pull bar termination and for locking main spring seat (29).

4,, it is characterized in that having general pillar seal ring, back-up ring and pillar and the pillar head of being with J RunddichtringO and supporting sleeve is housed according to the brake slack adjuster (IV type) of claim 1 regulation.

5, according to the brake slack adjuster (II type) of claim 1 regulation, it is characterized in that the control lever (33) that adopts is the C point place that is contained in the level braking lever, thus expendable weight and the big control ratio of acquisition.

6, according to the control lever of the brake slack adjuster of claim 5 regulation, it is characterized in that when the repacking used car, be equipped with two on the Xiao Zi (36) and roll and overlap (37) and angle bar (34).

7, transfer device according to the lock of claim 1 regulation, the housing (10) and the pull bar (21) that it is characterized in that adopting the solid drawn pipe wall not process have the technological sleeve body of few chipless machining (9), stop collar (7) and main spring seat (29) in addition.

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