CN2125043U

CN2125043U - Hand-operated brake

Info

Publication number: CN2125043U
Application number: CN 92209615
Authority: CN
Inventors: 赵焕玉
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-05-16
Filing date: 1992-05-16
Publication date: 1992-12-16

Abstract

The utility model relates to a hand-operated brake, composed of a brake bottom plate, a brake drum cam mechanism, brake belt components and a brake operating mechanism. The place between the brake bottom plate and the brake drum of the hand-operated brake does not require any components. Thus, the utility model is a camshaft brake double belt out covered type hand-operated brake. Because the brake and the brake operating mechanism are arranged outside the brake drum, the space limitation is freed. The lever ratio of the operating mechanism can be properly selected for obtaining the force required by a driver's hand braking operation. The braking operation is sensitive and reliable, and the driving safety is ensured.

Description

Hand-operated brake

The utility model relates to the centre brake or the hand brake of a kind of automotive brake, particularly automobile.

The centre brake of existing automobile or the structure that hand brake mostly is shoe drum, particularly in light-duty vehicle, the hand-made swing arm of this hand brake is arranged in the space that braking bottom board and brake drum limit, because this space is very narrow and small, the length that for this reason defines described hand-made swing arm also must be less, cause driver bigger power just can make the brake cam rotation and to carry out hand braking, increased the labor intensity of driver, the increase of braking force is slow, has influenced the driving safety of automobile.

For this reason, the utility model proposes a kind of camshaft braking biobelt hem type hand brake, its brake arm one torque arm, rocking arm all are arranged on outside the brake drum, broken away from the space boundary between braking bottom board and the brake drum, above-mentioned all brake arms suitably can be extended, thereby overcome the deficiency of above-mentioned prior art.

Hand brake of the present utility model comprises a braking bottom board and a brake drum, between them, need not to be provided with parts such as traditional brake shoe, brake arm and cam, brake band assembly around brake drum is installed on described braking bottom board outer rim, with cam mechanism and the braking maneuver mechanism that clamping strap tightly links to each other, described braking maneuver mechanism is linked to each other with hand braking handle by wire rope.

Hand brake of the present utility model is owing to adopt biobelt hem type structure, the layout of the rocking arm of break, torque arm and each parts is not subjected to the spatial constraints between braking bottom board and brake drum, thereby the structure of above-mentioned brake arm suitably can be strengthened, to obtain comparatively ideal lever ratio, reduce driver and handle the required power of hand brake, improved the sensitivity of braking, made automobile hand brake stop and in case of emergency can brake reliably.

Below in conjunction with accompanying drawing hand brake of the present utility model is described.Wherein,

Fig. 1 is the schematic representation of hand brake of the present utility model;

Fig. 2 is an A-A line sectional view among Fig. 1;

Fig. 3 be among Fig. 2 B to partial view.

With reference to above-mentioned Fig. 1-3 as can be known, hand brake of the present utility model comprises a braking bottom board 17 and brake drum 18, on braking bottom board 17, a pair of clamping strap 9 is installed by two bolts 7, be generally riveted joint on the clamping strap 9 in a conventional manner brake lining 8 is installed, and this clamping strap 9 is centered around on the outer fringe surface of brake drum 18 should guarantee to have certain clearance between the two simultaneously when non-braking state, the other end (relative with bolt 7) at clamping strap 9 can be a bolt by stay rod pin 10() link to each other with pull bar 12, pull bar 12 can be regulated its length by adjusting nut 11, the other end of this pull bar 12 respectively by pair of bolts 21 be connected to the cam 14 affixed with camshaft 14 ' on, its position of described connection is in the both sides and the symmetry of described camshaft 14, described camshaft 14 is rotatably mounted in the hole of putting the bearing 15 that is fixed in braking bottom board 17 tops, and from this hole, reach outside the back side of braking bottom board 17, so that be fixed together; the other end of rocking arm 3 contacts with the protruding tongue of torque arm 13 with rocking arm 3; and rocking arm 3 links to each other with rocker-arm return spring on being fixed on braking bottom board 17 through spring bracket; and described torque arm 13 is pivotally connected to by torque arm stationary axle 4 on the bearing that is fixed on the braking bottom board 17, and the other end of torque arm 13 is linked to each other with hand braking Joystick through a guiding carrier by wire rope 6; In order all to adopt suitable friction-reducing measures in the position that the above-mentioned axle of reducing friction cooperates with the hole, as on bearing 15, adding a grease fitting or adopting a cooperating structure of a lining one bearing.Even for the amount of exercise that guarantees described two clamping straps 9 in addition to the center contraction, even the friction plate of brake shoe 8 contacts with brake drum 18 equably, can regulate the adjusting nut 11 of above-mentioned pull bar 12, thereby guarantee effectively applying of braking force, reduce the working life that unnecessary wearing and tearing improve hand brake.

The utility model is not limited in the above embodiments.

Claims

1, the hand brake that is used for automobile, it is made up of braking bottom board, brake drum, cam and clamping strap and braking maneuver mechanism, it is characterized in that installing on the described braking bottom board outer rim brake band assembly around described brake drum, and cam mechanism that links to each other with clamping strap and braking maneuver mechanism, described braking maneuver mechanism is linked to each other with hand braking handle by wire rope.

2, hand brake according to claim 1 is characterized in that described cam mechanism is linked to each other with clamping strap by pull bar, the adjustable in length of described pull bar.

3, hand brake as claimed in claim 1 or 2 is characterized in that described braking maneuver mechanism comprises a torque arm, and it is connected on the bearing that is fixed on the described braking bottom board, and has the protruding tongue that matches with rocking arm, and this rocking arm and cam rotate with being integral.