CN208503315U - It is a kind of with the brake automatic clearance adjuster that can prevent excessive regulatory function - Google Patents

Abstract

The utility model provides a kind of with the brake automatic clearance adjuster that can prevent excessive regulatory function, including arm body, the first worm gear, worm component, cover plate assembly and one-way clutch assembly；Worm component is loaded in arm body worm hole, and is engaged with loaded on the first worm gear in arm body worm wheel aperture, and cover plate assembly is loaded on the outer large end face of the first worm wheel aperture, and the one-way clutch assembly is loaded in clutch hole；Second worm screw of one-way clutch assembly engages with the second worm gear of worm component, and the gear of one-way clutch assembly is engaged with the fluted disc of cover plate assembly, and the first worm screw of worm component engages to form complete transmission chain with the first worm gear.The utility model is able to achieve the High Precision Automatic adjustment of wearing clearance between bridge brake drum and braking brake block, it too small causes to drag brake problem in the gap that can prevent bridge brake drum and brake shoes, prevent the raising of brake drum dynamic temperature from causing vehicle incidents of spontaneous combustion, and reduce oil consumption, drive a vehicle it is more brisk with it is safe.

Description

It is a kind of with the brake automatic clearance adjuster that can prevent excessive regulatory function

Technical field

The utility model belongs to vehicle braking control technical field, and in particular to one kind have can prevent excessive regulatory function Brake automatic clearance adjuster.

Background technique

Country's truck, semitrailer, the commercial vehicles such as car are still mainly based on drum brake system at present, braking system Adjusting is realized by adjustment arm in gap in system between brake drum and braking brake block.Respectively wheel braking will synchronize when braking, It is just not in the accident generation of sideslip and whipping to guarantee that automobile brake is steady.In order to guarantee that each wheel brake clearance is balanced, state Relevant departments of family have notified formally implement GB7258-2017 national legislation, provide by the 7.2.7 item of this regulation, will be Require 3.5 tons or more of drum-type vehicle bridge all by adapted automatic clearance adjuster from January 1st, 2018, automatic adjusting arm will take The manual lash of generation routine adjusts arm.

There are many producer of domestic production automatic clearance adjuster at present, but be essentially all it is imitated, it is numerous in variety, technology and Quality is also irregular, specifically all can only automatically turn the gap between the brake drum of wheel and shoe brake down from performance, And gap is stabilized to the range of setting, can not prevent due to robot arm occur excessively adjust and cause wheel brake drag brake, The function of anti-lock.But the practical often load-carrying of vehicle travels over long distances or on the road of long descending, especially in mountain area, by It is increased quickly in the temperature of the brake drum in frequent and prolonged brake, wheel, it may appear that heat expansion, brake shoes abrasion Fastly, will increase with the gap between shoe brake, automatically adjusting arm at this time will start automatic regulation function, and gap is adjusted to want The gap for asking brake to need, to reach braking needs.But when wheel temperature returns to normal, break drum temperature is reduced, and can be shunk, this When will become smaller with the gap between shoe brake, and braking gap has been less than the needs of normally travel at this time, can lead when serious Wheel is caused to drag brake even locking, vehicle is unable to normally travel.This process is exactly that wheel hub due to expanding with heat and contract with cold causes robot arm to go out Now excessively adjust.If continuing to travel at this time, shoe plate premature abrasion can be made, in addition can cause vehicle drag brake and it is on fire, it is this Defect is all unavoidable problem of current all automatic clearance adjusters, because these robot arms, which all do not have, to be prevented from excessively adjusting The function of section, i.e. automatic function can only all turn gap down when starting, and not play back the function in gap.

Summary of the invention

Aiming at the deficiencies in the prior art, the utility model provides a kind of with the brake that can prevent excessive regulatory function Vehicle automatic clearance adjuster.The utility model not only solves robot arm and brake drum fever, mistake caused by excessively adjusting occurs The problem of early wearing and drag brake, and have and turn gap down, constant function, while can be inclined to braking gap with automatic sensing When small, gapless, by the effect repeatedly braked, gap appropriate is released automatically, realization has suitable in any road conditions Gap exist.

For above-mentioned purpose, technical solutions of the utility model are as follows:

It is a kind of with the brake automatic clearance adjuster that can prevent excessive regulatory function, including arm body, the first worm gear, worm screw Component, cover plate assembly and one-way clutch assembly, worm component loaded in arm body worm hole, and with loaded in arm body worm wheel aperture The engagement of first worm gear, the cover plate assembly are loaded on clutch loaded on the outer large end face of the first worm wheel aperture, the one-way clutch assembly Kong Zhong；The worm component includes plane bearing, the second worm gear, the first worm screw, loading spring and spring push plate, the cover board group Part includes fluted disc, cover board and control arm, and the one-way clutch assembly includes gear, upper gear wheel, lower gear wheel, the second worm screw, lock Set, pin shaft and clutch spring；Second worm screw engages with the second worm gear on worm component, the gear and cover plate assembly Fluted disc engagement, the first worm screw engages to form complete transmission chain with the first worm gear；When control arm pendulum, pass through the above transmission chain The first worm gear can be driven to rotate.

Further, the worm component further includes bearing blind nut, spring blind nut, sealing ring, bearing gland and pin.

Further, for the perforation of full tooth, the gear for clutch pack is engaged with and can move up and down the fluted disc.

Further, the one-way clutch assembly further includes tower-shaped spring and end cap, can be substituted with elastic part, Such as spring, rubber, polyurethane.

Further, the tower-shaped spring is installed on stepped hole in gear large end face, makes one-way clutch assembly to moving down Dynamic function, the end cap then cover tower-shaped spring；The end cap and spring are made into a flexible whole pearl.

The utility model has the advantages that

1. there is the utility model automatic adjusting arm biggest advantage to be can automatic sensing compared with existing automatic adjusting arm To when wheel braking gap is less than normal or gapless, certain gap can be released automatically；It effectively prevent wheel small because of braking gap Appearance drags brake, shoe brake to cross quick-wearing, oil consumption height, even wheel because dragging the similar safety such as excessively high accident on fire of brake temperature to ask Topic occurs, to bull point guarantee in terms of personal and property safety.

2. the utility model automatic adjusting arm can automatically turn the braking gap that brake-shoe abrasion becomes larger down；Solves brake Vehicle drags the problem of brake, can extend brake shoes and brake the service life agitated, securely and reliably.

3. it is compact to design reasonable, the part and modular construction of existing robot arm maturation are taken full advantage of, is greatly reduced Design and develop expense and manufacturing cost；Market prospects are considerable, can bring huge economic benefit.

Detailed description of the invention

Fig. 1 is the general assembly structural schematic diagram of the utility model.

Fig. 2 is the worm component Standard schematic diagram of the utility model.

Fig. 3 is the cover plate assembly structural decomposition diagram of the utility model.

Fig. 4 is the one-way clutch assembly structural schematic diagram of the utility model.

Fig. 5 is the one-way clutch assembly diagrammatic cross-section of the utility model.

Fig. 6 is the assembly structure explosive view of the utility model.

In figure: 1- arm body, the first worm gear of 2-, 3- worm component, 4- cover plate assembly, 5- one-way clutch assembly；101- lining Set, 102- lubricating cup, 103- oil cup cap；301- bearing blind nut, 302- plane bearing, the second worm gear of 303-, the first worm screw of 304-, 305- loading spring, 306- spring blind nut, 307-O type sealing ring, 308- bearing gland, 309- pin, 310- spring push plate； 401- fluted disc, 402- cover board, 403- sealing ring, 404- control arm, 405- gasket, 406- screw；501- gear, on 502- Gear wheel, gear wheel under 503-, the second worm screw of 504-, 505- lock tube, 506- screw, 507- pin shaft, 508- clutch spring, 509- Tower-shaped spring, 510- end cap.

Specific embodiment

The utility model is described in detail with reference to the accompanying drawings and examples.

As shown in Figure 1, it is a kind of with the brake automatic clearance adjuster that can prevent excessive regulatory function, including arm body (1), First worm gear (2), worm component (3), cover plate assembly (4) and one-way clutch assembly (5), worm component (3) are loaded on arm body (1) It in worm hole, and is engaged with loaded on the first worm gear (2) in arm body (1) worm wheel aperture, cover plate assembly (4) is loaded on outside the first worm wheel aperture Large end face, one-way clutch assembly (5) is loaded in clutch hole, wherein 5 bushings (101) are housed in arm body (1) main body, with Worm component (3) top is equipped with lubricating cup (102), and bushing (101) presses in lower arm body delthyrium, connect with gas chamber plug, pass through oil Cup (102) can internally inject lubricant grease.

As shown in Figure 2 and Figure 6, mainly there are bearing blind nut (301), plane bearing (302), the second worm gear on worm component (303), the first worm screw (304), loading spring (305), spring blind nut (306), O-ring seal (307), bearing gland (308), Spring push plate (310), loading spring (305) load axial thrust in one end of the first worm screw (304), make the first worm screw (304) On cone tooth and the second worm gear (303) end face cone tooth engagement, second on the second worm gear (303) and one-way clutch assembly Worm screw (504) engagement, and by one-way clutch assembly (5) driving worm component (3) rotation；

As shown in figure 3, cover plate assembly (4) include fluted disc (401), cover board (402), sealing ring (403), control arm (404), Gasket (405), control arm (404) riveting can rotate on fluted disc (401) on cover board (402).

As shown in Fig. 4,5 and Fig. 6, one-way clutch assembly (3) includes stepped gear (501), upper gear wheel (502), lower gear wheel (503), the second worm screw (504), lock tube (505), screw (506), clutch pin shaft (507), clutch spring (508), tower-shaped Spring (509) and end cap (510) are lockked by screw (506) and are fixed on clutch pin shaft (507), upper gear wheel (502) with Lower gear wheel nibbles (503) and is meshed, and one-way clutch, gear (501) and upper gear wheel are formed under the action of clutch spring (508) (502) slide outside cooperates, and can slide axially, have small gap in angle, lower gear wheel (503) close-fitting is in the second worm screw (504) on；Component is applied axial force by clutch spring (508), and gear (501) is engaged with the fluted disc (401) of cover plate assembly, this Sample can drive one-way clutch assembly (5) to rotate.

Working principle of the utility model is:

(1) braking gap is transferred to sets requirement: by robot arm on the splined shaft of axle, and fixing control arm, steps on Arm body is pushed one brake angle of rotation by lower brake, the brake chamber in vehicle bridge, the fluted disc drive clutch on cover plate assembly On gear rotation, brake chamber continues to press on arm body, the brake drum of vehicle bridge contacted with brake block after reaction force pass through it is convex Wheel shaft is transmitted on the first worm gear, the first worm gear can by worm screw axially press, when the thrust of worm screw reaches can be by loading spring pressure When contracting, so that it may so that the cone tooth of end face and the cone tooth on the end face of the second worm gear separate, disconnect transmission chain, each part is protected not damage It is bad.

When releasing of brake, air chamber push rod retracts, and band swing arm body goes back to most initial position, and worm screw is in load bullet during this Again tooth engagement is bored under the action of spring with the second worm gear, one-way clutch pushes worm screw rotation, then rotates the first worm gear, realizes The function that gap between brake-shoe and brake drum is turned down；Continuous several times step on brake, robot arm can slowly by brake drum with Braking gap between brake-shoe is stabilized to the requirement of setting.

(2) start excessive regulatory function: this function is only less than in the bulging gap between brake block of the system of vehicle bridge normal This function ability automatically starting when gap could be completed in multiple brake, gradually amplify gap, be restored to normal requirement.

Specifically, there is gap between the big worm hole bottom face of arm body and the end face of the first worm screw, the tail end of the first worm screw has The sphere-contact of concave ball surfaces and spring push plate protrusion, the first worm screw resistance is smaller, can ease rotation；One-way clutch assembly with There are gap between clutch hole on arm body, unidirectional high clutch component can be moved；Using upper on one-way clutch assembly Ratchet back slope resistance between gear wheel and lower gear wheel, in each brake, what the front gear of ratchet disengaging generated when turning round Rotary force drives entire one-way clutch assembly rotation, until the first worm gear turns round a small angle, when the first worm screw Reaction force makes one-way clutch assembly mobile to lower end at leisure again when end face and the worm hole bottom surface of arm body contact；Through excessive Secondary brake by loose gap is not continued to go back to after resistance, locks the until one-way clutch assembly is contacted with arm body opening bottom completely One worm gear continues to adjust back, and returns to normally to the gap between this brake drum and brake block.

The above content is the detailed descriptions for combining optimal technical scheme to do the utility model, and it cannot be said that utility model Specific implementation be only limitted to these, for made under the premise of not departing from the utility model thought it is simple deduction and replacement, all It should be considered as the protection scope of the utility model.

Claims (5)

1. a kind of with the brake automatic clearance adjuster that can prevent excessive regulatory function, including arm body, the first worm gear, worm screw group Part, cover plate assembly and one-way clutch assembly, worm component loaded in arm body worm hole, and with loaded on the in arm body worm wheel aperture One worm gear engagement, it is characterised in that: the cover plate assembly is loaded on the outer large end face of the first worm wheel aperture, the one-way clutch assembly dress In clutch hole；The worm component includes plane bearing, the second worm gear, the first worm screw, loading spring and spring push plate, institute Stating cover plate assembly includes fluted disc, cover board and control arm, and the one-way clutch assembly includes gear, upper gear wheel, lower gear wheel, second Worm screw, lock tube, pin shaft and clutch spring；Second worm screw engages with the second worm gear on worm component, the gear with The fluted disc of cover plate assembly engages, and the first worm screw engages to form complete transmission chain with the first worm gear；When control arm pendulum when, by with Upper transmission chain can drive the first worm gear to rotate.

2. brake automatic clearance adjuster as described in claim 1, which is characterized in that the worm component further includes bearing spiral shell Lid, spring blind nut, sealing ring, bearing gland and pin.

3. brake automatic clearance adjuster as described in claim 1, which is characterized in that the fluted disc is the perforation of full tooth, for The gear of clutch pack is engaged with and can move up and down.

4. brake automatic clearance adjuster as described in claim 1, which is characterized in that the one-way clutch assembly further includes Tower-shaped spring and end cap, can be with having elastic part substitution, such as spring, rubber, polyurethane.

5. brake automatic clearance adjuster as claimed in claim 4, which is characterized in that it is big that the tower-shaped spring is installed on gear Stepped hole in end face, the function of moving down one-way clutch assembly, the end cap then cover tower-shaped spring；The end cap with Spring is made into a flexible whole pearl.