Drive mechanism of vehicle disk brake

FIELD: machine building.

SUBSTANCE: drive mechanism of disk brake of vehicle includes bracket consisting of case and cover, brake drive shaft and screw gear installed in bracket, and also lever mounted on external side of bracket on brake drive shaft. A mechanism of automatic control of the brake including a driving link is installed inside the lever. The driving link of automatic control of the brake is arranged coaxially to the brake drive shaft and is kinematically coupled with the bracket. A movable in circumferential direction packing is positioned between the bracket and a controller of the drive lever so, that internal cavities of the bracket and the lever form a common cavity sealed from the side opposite to the bracket.

EFFECT: simplification of design, raised maintainability and service life of mechanism of vehicle dick brake drive.

1 dwg

 

The invention relates to the field of engineering, namely, to drive mechanisms disc brakes, and can be used in the brake devices of vehicles with pneumatic brakes.

A known drive mechanism of the disk brake of the vehicle (Patent No. DE 10201221 A1, IPC F16D 65/52, publ. 24.07.2003)that contains a bracket, consisting of a body and cover, located in the bracket shaft brakes, two helical gears and mechanism of automatic control brakes and located on the outer side of the bracket on said shaft lever brakes.

The disadvantage of this drive mechanism of the disk brake is the complexity of the design.

Also known drive mechanism of the disk brake of the vehicle (U.S. Patent 4406352, IPC3F16D 55/224, priority, 1980, publ. 27.09.1983)that contains a bracket mounted in the bore of the shaft, helical gear, and mounted on the outside of the bracket on said shaft lever brake, which comprises the mechanism for automatic control of the brakes, including leading link.

The disadvantage of this drive mechanism of the disk brake is a complex mechanism of regulation brakes and lack of maintainability and durability. The cavity of the bracket and the lever independently of each other is nabity sealed for protection against moisture and dirt. This is due to a large number of sealing elements. However, the splined connection of the lever and drive shaft brakes and details of the mounting of the lever on the shaft is not protected from the external environment and susceptible to corrosion. As a result, they quickly fail. Splined connection due to corrosion is usually non-separable, which makes it difficult to repair the brakes.

The technical task of the present invention is the elimination of these inefficiencies, simplify design, increase maintainability and durability of the drive mechanisms of the disk brake of the vehicle.

This problem is solved due to the fact that the drive mechanism of the disk brake of the vehicle containing consisting of a body and a cover bracket, located in the bracket shaft brake and at least one helical gear and mounted on the outside of the bracket on said shaft drive brake lever, which comprises the mechanism for automatic control of the brakes, including leading link, the latter is coaxial shaft drive brake and kinematically connected with the bracket, between the bracket and the lever of the regulator is set movable in the circumferential direction of the seal so that the internal cavity of the bracket and lever brakes the image of the t total cavity, which is the side opposite to the bracket tightly closed.

The drawing shows a drive mechanism of the brake section along the axis of the shaft and helical gears.

The drive mechanism of the disk brake of a vehicle includes a bracket including a body 1 in the bore of which is a shaft 2 of the drive brakes. Parallel to the mentioned shaft 2 is at least one screw passing consisting of nuts 3 and screw 4 (the drawing shows two helical gears). Nut 3 each helical gears installed in the bore of the housing bracket on the radial bearings 5 and 6 and its end rests on the thrust bearing 7, which, in turn, is supported on the lid 8 of the bracket, secured by screws 9 to the housing 1 of the brackets.

On the screw shank 4 has a stop 10, designed to impact brake pad 11.

The shaft 2 of the drive brake is supported by bearings 12 mounted in the cover 8 of the bracket, and kinematically connected with the nut 3 screw transmission through the gears, sprocket 13 which is installed on the shaft 2 of the drive brakes and follower wheel 14 made integral with the nut 3 screw transmission.

On the shaft 2 of the drive brakes with the outer side of the bracket has an arm 15, which comprises the mechanism for automatic control of the brake. And leading link 16 automatic mechanism to regulate the financing brakes installed coaxially with the shaft 2 of the drive brakes. The mechanism of regulation of the brakes may be of any known construction used for regulating brake drum with pneumatic drive.

Between the cover 8 of the bracket brake and cover 17 mechanism of automatic control of the brake is set movable in the circumferential direction of the seal 18. Moreover, it is set so that the internal cavity of the bracket and the lever 15 to form one common cavity, which is the side opposite to the bracket, hermetically closed by a plug 19.

Cover 8 clips and leading link 16 mechanism of automatic control of the brake is connected with the possibility of transmission of rotation through the gear pair 20.

To protect the internal cavities of the brakes from moisture and dirt from brake pads installed shirred cuff 21.

Operates the drive mechanism of the disk brake as follows.

When braking the vehicle, the lever 15 is rotated by the brake chamber (not shown). Through the shaft 2 of the drive brakes and gears 13 and 14, the rotation is transmitted to the nut 3 screw transmission. As a result, the screws 4 screw gear is moved in the axial direction. With them moved lugs 10 and, therefore, transfer the brake pad 11. Thus, is the process of deceleration is possible. When releasing all the details of the drive brake is returned to its original position.

When the lever 15 leading link 16 mechanism of automatic control of the brakes associated toothed connection 20 with the cover 8 of the bracket remains stationary relative to the bracket, but is rotated relative to the lever 15. The result of this is driven by the control mechanism brakes, located inside of the lever 15.

When using this technical solution simplifies the design of the drive brakes, increases reliability, improves maintainability. Reduces the number of moving seals, increases the reliability of the clamping lever on the shaft. Removal and installation of the lever when the repair is straightforward. This is because the connection of the lever with the brake is protected from contamination and corrosion.

The drive mechanism of the disk brake of the vehicle containing consisting of a body and a cover bracket, located in the bracket shaft brake and at least one helical gear and mounted on the outside of the bracket on said shaft drive brake lever, which comprises the mechanism for automatic control of the brakes, including leading link, characterized in that the leading link of the mechanism of automatic control that is the MH is located coaxially with the shaft drive brake and kinematically connected with the bracket, and between the bracket and the lever of the regulator is set movable in the circumferential direction of the seal so that the internal cavity of the bracket and lever brakes form a common chamber which is opposite the bracket, sealed.



 

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