Adjustable brake assembly for tricycle

Abstract

The invention discloses an adjustable brake assembly for a tricycle. The adjustable brake assembly comprises a brake disc (1), a brake shoe assembly (2), a tension spring (3), a brake pin (4) and a brake shaft (5). The brake pin comprises a first shaft lever (4a), a second shaft lever (4b) and a flat square (4c). The downward offset distance e, relative to the axis of the second shaft lever, of the axis of the first shaft lever is greater than or equal to 3mm. The first shaft lever is matched with a central sleeve (21a) of a brake shoe (21). The second shaft lever is matched with a brake pin sleeve (1a). The flat square extends out of the brake shaft sleeve (1b), is sleeved with a scale pointer steel disc (6) and is locked tight through a nut (7). The periphery of the end face, close to the scale pointer steel disc, of the brake shaft sleeve is provided with scale marks (1c). The maximum width W1 of a kidney-shaped shaft lever (5a) is greater than or equal to 32mm, and the minimum width W2 of the kidney-shaped shaft lever (5a) is 14mm-15mm. According to the adjustable brake assembly for the tricycle, the abrasion to a friction plate can be compensated to the maximum degree, a brake clearance can still be accurately controlled to keep the optimal state of 0.3-0.6mm in the middle and later periods of the abrasion, the service life of the friction plate is prolonged, and waste is avoided.

Description

technical field [0001] The invention relates to a vehicle brake system, belongs to the technical field of mechanical brake brake assemblies, and is mainly applicable to the technical field of tricycle brakes. Background technique [0002] A "tricycle brake assembly" (patent number 201120280729.0, announced on 2012.03.21) is disclosed on the website of the State Intellectual Property Office. The tricycle brake assembly is composed of a brake disc, a pair of brake shoe assemblies, extension springs, brake pins, brake shafts, etc., and is one of the structural forms of the tricycle mechanical brake assembly. [0003] The working principle of the mechanical brake brake assembly is to achieve the purpose of braking by driving the friction plate 22 and the brake disc 1 to generate friction through the force of the pedal through the pull rod. figure 1 Shown is the initial ideal state. At this time, the gap between the friction plate 22 and the brake disc 1 is 0.3-0.6 mm, the braki...

AI Technical Summary

Problems solved by technology

When the brake shaft 5 rotates to a horizontal state, such as figure 2 As shown, at this time, the friction plate 22 has been used to the limit state, but the friction plate 22 still has a large thickness, and the friction plate 22 can no longer compensate for the wear, which will cause a lot of waste on the one hand, and cause braking on the other hand. When the gap between the brake disc and the brake disc is too large, the braking torque will be lengthened, resulting in insensitive braking and prolonged braking time. In case of an emergency, the car cannot be parked immediately and cause an accident, especially when carrying goods on a long downhill slope. Higher requirements for dynamic torque and braking sensitivity, causing traffic accidents due to untimely braking

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