Mechanism for automatic control of parking brake

FIELD: automotive industry.

SUBSTANCE: mechanism comprises expansion lever mounted on the axle for permitting rotation. The rocking axle is secured to the back brake block. The rocking axle of the expansion lever is provided with distance wedge that abuts against the bearing secured to the front brake block. The bearing is welded to the front braking block. The spring connects the distance wedge with the front brake block and is made of two steel plates. The position and shape of the plates allows wedging and releasing of the distance wedge.

EFFECT: simplified structure.

4 dwg

 

The invention may be applicable for vehicles with drum brakes.

The design of the drive currently applied Parking brake of the vehicle, such as Moskvich-2140 (described in the book "Moskvich-2140" under the authorship Liebeskind, Lrgasimova and other Meters: machinery, 1976), involves manual clearance adjustment brake pads depending on their wear. The mechanism for manual adjustment of the brake pads has drawbacks:

- periodic, depending on wear, reducing the efficiency of the Parking brake;

- the complexity of operations adjustment of the Parking brake.

The present invention aims to simplify the design and reduce costs in the manufacturing process, improving the safety of vehicle operation. In addition, the proposed design does not require adjustment, adjustment, routine inspection until complete wear of the brake pads.

The automatic adjustment mechanism (figure 1) consists of camshaft lever 1 which swings on an axis No. 1 rolling 2, axis No. 1 rolling fixed to the rear brake Shoe 3. On Rethimnon the lever on an axis No. 2 rolling 4 swinging spacer wedge 5. Spacer wedge rests on a support 6, which is attached to the front of the brake pad 7. Bearing consists of two steel plates.

The location and shape of the layer is n provides jamming and releasing spacer wedge during operation of the Parking brake (figure 2 and figure 3).

The force from the drive cable is passed through Rethimno the lever on the spacer wedge, then through the support of the wedge on the front brake pad. During vehicle operation due to wear of the plates, the distance between the brake pads increases. The location of the line of contact of the bearing with spacer wedge angle lower than 90°, provides movement of the spacer wedge down and eliminate emerging gaps. Moves the spacer wedge under the action of its own weight and the spring 8, which connects the thrust wedge and the front brake pad. Figure 4 presents the location of the spacer wedge at different wears.

Position 9 - less wear on brake pads, 10 more wear on the brake pads. To prevent accidental loss of the spacer wedge from support to support welded two stopper 11 on the ends of the supports (figure 3).

The mechanism for automatic adjustment of the Parking brake vehicles with drum brakes, containing Rethimno lever, characterized in that Rethimno lever is mounted for oscillation on an axis that is fixed on the rear brake pads on Rethimnon the lever on the axis of the swing set spacer wedge, which rests on a support attached to the front brake pad, bearing welded to the front brake Shoe, a spring connects the favor of the hydrated wedge and the front brake pad and consists of two steel plates, moreover, the location and shape of the plates provide jamming and releasing spacer wedge the location of the line of contact of the bearing with spacer wedge angle lower than 90°to provide movement of the spacer wedge down, Troubleshooting gaps and move the spacer wedge under the action of its own weight and the spring.



 

Same patents:

FIELD: mechanical engineering.

SUBSTANCE: drive comprises cylinder and hollow piston set in the cylinder. The piston receives the guide secured to the cylinder, mechanism for locking the piston made of conical bushing that is in a contact with the pressing bushing via the spring, and inserts set in the conical bushing. The pressing bushing cooperates with the piston. The inserts are mounted for permitting axial movement in the guide and are pressed to the conical bushing by means of the return spring. The mechanism for locking the piston is additionally provided with the sleeve interposed between the piston bottom and spring. The sleeve is rigidly connected with the conical bushing and cooperates with the return spring.

EFFECT: enhanced reliability.

3 dwg

FIELD: automotive industry; pneumatic brake systems.

SUBSTANCE: proposed brake regulator contains housing which serves as brake lever and worm train arranged inside housing which includes worm wheel and worm, screw train and control member coupled with lock to transmit rotation. Gear wheel of screw train is installed coaxially to worm of worm train, mechanically coupled with worm of worm train by means of spring-loaded lock, its axial displacement being prevented by means of threaded bushing. Trapezoidal slots opened from side of larger base are made on end faces of worm of worm train and gear wheel of screw train pointed to each other. Side surfaces of slots are inclined to axis of worn through angle greater than friction angle. At least two tenons are made on lock and lock is mounted so that said tenons are arranged in slots of worn and gear wheel of screw train. Lock can be made in form of cylindrical rod or in form of sprocket, with number of tenons greater than two.

EFFECT: improved reliability of regulator and simplified process of manual regulation of brake.

10 cl, 13 dwg

The invention relates to the field of transport engineering and is intended for use in disc brakes as ground transportation and aircraft

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The invention relates to transportation engineering and is intended for use in automobile brake systems, mainly in commercial vehicles and their trailers

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The invention relates to the design drum brakes vehicle with a device for automatic adjustment of the service and Parking brake systems

The invention relates to the field of engineering, in particular to actuators of brake wear, and can be used for braking and brake release wheels with disc brakes, for example, aircraft

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The invention relates to the field of engineering, namely for the construction of the brake mechanisms, and can be used to automatically adjust the consistency of the gap in the brake mechanisms

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FIELD: automotive industry.

SUBSTANCE: mechanism comprises expansion lever mounted on the axle for permitting rotation. The rocking axle is secured to the back brake block. The rocking axle of the expansion lever is provided with distance wedge that abuts against the bearing secured to the front brake block. The bearing is welded to the front braking block. The spring connects the distance wedge with the front brake block and is made of two steel plates. The position and shape of the plates allows wedging and releasing of the distance wedge.

EFFECT: simplified structure.

4 dwg

FIELD: transport.

SUBSTANCE: invention relates to cam-driven block brakes and their components. Cam (38) has one or several ledges (62, 64) with multiple sections (62A-C, 64A-C) that feature various profiles in axial cross section. Varying the cam profile allows producing the cam with the extreme outer ends or apexes of the ledges with length exceeding that of common cams, the mechanical strength being preserved. Increased travel of brake shoes allows using brake shoe lining of increased thickness.

EFFECT: longer life of brake shoe linings.

45 cl, 11 dwg

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FIELD: automotive industry.

SUBSTANCE: invention relates to automotive industry, particularly to drum brake linings. Proposed friction lining is produced from polymer friction material and features the shape of a part of cylindrical ring. Ratio of radii of the lining inner and outer surfaces varies from 1.030 to 1.060 with polymer matrix content in the said friction composite exceeding 22% by weight. Aforesaid ratio of radii of the lining inner and outer surfaces varying from 1.060 to 1.095, polymer matrix content in the said friction composite is smaller than or equal to 22% by weight.

EFFECT: higher operating performances.

1 dwg

Friction item // 2369784

FIELD: instrument making.

SUBSTANCE: invention is related to the field of friction items, in particular to brake pads of drum brakes in vehicles. Friction item is equipped with openings for rivets installed in rows on both sides from plane of item symmetry at the same distance from plane of item symmetry. Ratio between distance from opening centres to plane of item symmetry and difference of maximum and minimum thickness of item in zone of its working surface makes from 6 to 26.

EFFECT: invention provides for better operational characteristics of pad with varioys thickness due to optimisation of stresses that occur in pad in process of operation.

2 cl, 2 dwg

FIELD: transport.

SUBSTANCE: proposed brake comprises brake drum with cooling device, brake shoes with friction linings, show springs, brake disk and drive. Said cooling device represents cylindrical heat pipes arranged in identical-diametre through holes regularly spaced along perimetre at the brake drum center, perpendicular to friction surface. Plugs are arranged in heat pipes, on the side of brake drum rim. There are wedge-like rectangular-section through holes at heat pipes center to receive wedge-like plates to make extra heat exchange surfaces that contact brake drum non-working surfaces by their inner faces. Wedge-like plate outer surface features grooves accommodating spring ring.

EFFECT: reduced thermal load, increased service life.

2 dwg

Friction lining // 2388945

FIELD: transport.

SUBSTANCE: friction lining represents a part of cylindrical ring formed by misaligned cylindrical surfaces with parallel rotational axes and has different-thickness ends. Side surface limiting the lining on thin-end side represents two aligned flat surfaces. Side surface limiting the lining on thick-end side represents flat surface not radial to lining outer surface radius. Rotational axes of cylindrical surfaces are located in the plane that does not cross nor contact the lining.

EFFECT: shorter running-in during operation.

1 dwg

Friction facing // 2391579

FIELD: machine building.

SUBSTANCE: length of facing arc along internal surface and difference of thickness of facing on ends corresponds to ratio: where H2 is thickness of thick end of facing, H1 is thickness of thin end of facing, and L is length of facing arc along internal surface.

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1 dwg

Friction facing // 2391580

FIELD: machine building.

SUBSTANCE: facing made as part of cylinder shell created with non-axial cylinder surfaces with parallel axes of rotation and ends of different thickness. Side surface of the facing limiting the facing from the side of a thin end, is made as two conjugating flat surfaces. Side surface of the facing, limiting the facing from the side of a thick end, is made as flat surface, not radial to radius of external surface of the facing.

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1 dwg

Friction lining // 2397381

FIELD: transport.

SUBSTANCE: proposed friction facing is made from polymer friction material and features shape of different-thickness cylindrical shell ring part, the latter being formed by misaligned cylindrical surfaces with parallel axes of rotation and flat lateral surfaces. Lateral layer of thin edge is made with chamfer. Said facing has holes to receive rivets. Said holes arranged on thin edge of facing are partly located on beveling.

EFFECT: improved operating properties.

2 dwg

FIELD: machine building.

SUBSTANCE: proposed method consists in heating independent friction pairs ''metal discs - friction facing sectors'' by cyclic or long-term braking at test bench to temperature below, equal to and above tolerable temperature for friction facing materials. Then, thermal electrodes of plate thermocouple are used to define thermal emf of thermal flux by relationship Ei=K(t1-t2), where K is thermal emf factor, mcV/°C; t1 and t2 are surface temperature of friction pairs and ambient medium, °C Then relationship is used where δ1234 ; λ1234 are thickness and heat conductivity factor of materials of the following elements: brake shoe base, friction facing and its surface layer, brake drum ring, to define total thermal current.

EFFECT: accurate estimation of heat amount generated in braking.

5 cl, 6 dwg

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