Automatic compensation drum brake

An automatic compensation and drum brake technology, applied in the field of mechanical drum brakes, can solve the problems of reduced brake sensitivity, looseness, and large safety hazards, and achieve the effects of increased shoe life, less production difficulty, and sensitive brakes

CN113895556APending Publication Date: 2022-01-07肖一夫
0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2022-01-07

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

An automatic compensation drum brake comprises a drum cover, a rocker arm, a cam shaft, a first one-way bearing set, a second one-way bearing set, a brake shoe and a return spring of the brake shoe, the brake shoe is connected and arranged in the drum cover, and the cam shaft is provided with the first one-way bearing set and the second one-way bearing set and connected with the rocker arm through the first one-way bearing set. The second one-way bearing set is connected with the drum cover and abuts against the brake shoe. The two sets of one-way bearings are classically applied, the gap between forward rotation and reverse non-return of the one-way bearings is ingeniously utilized, automatic compensation is achieved in a limited space, and the brake drum is simple, reliable, small in production difficulty and low in cost. Manual adjustment is not needed, all brake pads of the shoe blocks can be completed, waste is avoided, and the service life of the shoe blocks is prolonged.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a mechanical drum brake of a vehicle, in particular to an automatic compensation drum brake. Background technique

[0002] At present, the mechanical drum brakes driven by wires on motorcycles, electric vehicles, motorcycles, etc., after the brake pads are worn out, the brake handles become loose, and the screws on the edge of the hub need to be manually tightened. The screws are stained with mud and water, and tools must be used, which is very troublesome. And with the rise of shared bicycles and shared electric vehicles, the vehicles are constantly flowing, which has caused major problems for maintenance. Loose brake lines, reduced brake sensitivity, and great potential safety hazards; and the brake pads are used up about 1mm. Take off the rocker arm (also known as the pull rod) and rotate it at an angle before reinstalling it. This process is not only professional but also troublesome, and the repairer is often not easy to c...

Examples

Embodiment Construction

[0018] see Figure 1-5 As shown, an automatic compensation drum brake includes a drum cover 1, a rocker arm 2, a camshaft 7, a set of one-way bearings 3, two sets of one-way bearings 5, a brake shoe block 6 and a return spring 61 thereof. The brake shoes 6 are connected and placed in the drum cover 1, and one set of one-way bearings 3 and two sets of one-way bearings 5 ​​are arranged on the camshaft 7, and the camshaft 7 is connected to the rocker arm 2 through one set of one-way bearings 3, The two sets of one-way bearings 5 ​​are used to connect the drum cover 1 and abut against the brake shoes 6. The two sets of one-way bearings rotate in the same direction. In the figure, one set of one-way bearings 3 is a one-way bearing with a circular outer ring. The second group 5 of the bearing is an outer ring pentagonal one-way bearing.

[0019] The first one-way bearing is provided with an inner liner 4, and the camshaft 7 is tightly connected to the inner liner 4. The embodiment ...