CN113027944A - Improved drum brake structure - Google Patents
Improved drum brake structure Download PDFInfo
- Publication number
- CN113027944A CN113027944A CN202110434266.7A CN202110434266A CN113027944A CN 113027944 A CN113027944 A CN 113027944A CN 202110434266 A CN202110434266 A CN 202110434266A CN 113027944 A CN113027944 A CN 113027944A
- Authority
- CN
- China
- Prior art keywords
- brake
- rotating shaft
- gear
- intermediate gear
- rocker shaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D51/00—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like
- F16D51/16—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like shaped as brake-shoes pivoted on a fixed or nearly-fixed axis
- F16D51/18—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like shaped as brake-shoes pivoted on a fixed or nearly-fixed axis with two brake-shoes
- F16D51/20—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like shaped as brake-shoes pivoted on a fixed or nearly-fixed axis with two brake-shoes extending in opposite directions from their pivots
- F16D51/22—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like shaped as brake-shoes pivoted on a fixed or nearly-fixed axis with two brake-shoes extending in opposite directions from their pivots mechanically actuated
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2121/00—Type of actuator operation force
- F16D2121/14—Mechanical
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
The invention provides an improved drum brake structure which comprises the following components: a pair of brake shoes are arranged in the drum brake shell, one ends of the brake shoes are respectively provided with a semi-arc surface and are arranged on a rotating shaft and can rotate around the rotating shaft, and the rotating shaft is fixedly arranged on the drum brake shell. The other ends of the pair of brake shoes are respectively made into concave tooth-shaped surfaces, an intermediate gear and a rocker shaft gear are arranged between the two tooth-shaped surfaces, and the intermediate gear is meshed with the tooth-shaped surface of one brake shoe contacted with the intermediate gear; the rocker shaft gear is also meshed with the tooth-shaped surface of the other brake shoe contacted with the rocker shaft gear; the intermediate gear and the rocker shaft gear are meshed with each other, the intermediate gear is sleeved on the rotating shaft and can rotate around the rotating shaft, and the rotating shaft is also fixedly arranged on the drum brake shell. The rocker shaft gear is part of the structure of the rocker shaft of the brake rocker arm assembly. When the rocker shaft rotates, the pair of brake shoes are driven to move in an opening and closing mode, and therefore the rocker shaft has a brake function.
Description
Technical Field
The invention belongs to the technical field of brake devices of motorcycles and electric vehicles.
Background
Drum brakes have been used for almost a century as brake components in motorcycles and electric vehicles, and generally comprise a housing, a pair of brake shoes, a brake cam, a brake rocker arm, an elastic reset element and the like. When braking, the brake rocker arm drives the brake cam to rotate, and the brake cam forces the brake shoe to expand and contact with the shell to generate friction so as to realize braking. After braking is finished, the brake shoe is pulled back to the original position by the elastic reset element. In the braking process, besides abrasion between the brake shoe and the shell, abrasion between the brake cam and the brake shoe is also generated, the abrasion is always concentrated on a plurality of points or surfaces of the brake cam, the service life of the brake cam is greatly shortened, in addition, the existing drum brake also has the defects of small braking moment, poor braking effect and large vehicle braking sliding distance, and the invention aims to improve the existing drum brake.
Disclosure of Invention
The invention aims to provide an improved drum brake structure, which changes the working mode that the original drum brake adopts a cam to directly drive a brake shoe to expand, and effectively overcomes the defects of poor braking effect, large vehicle braking sliding distance and easy abrasion of a brake cam of the existing drum brake. In order to solve the problems, the technical scheme of the invention is as follows: the utility model provides an improved structure is stopped to drum, by shell (1), locate a pair of brake shoes (2) in shell (1), install on shell (1) pivot (3) of brake shoes (2), connect elasticity reset element (4) between brake shoes (2), brake rocking arm subassembly (7), the pivot (6) of intermediate gear (5), intermediate gear (5) of clamp between a pair of brake shoes (2) constitute, its characterized in that: one end of each of the pair of brake shoes (2) is provided with a semicircular arc surface, is arranged on the rotating shaft (3) and can rotate around the rotating shaft (3), the rotating shaft (3) is fixedly arranged on the shell (1), the other end of each of the pair of brake shoes (2) is respectively made into an inwards concave tooth-shaped surface, an intermediate gear (5) and a rocker shaft gear (70101) are arranged between the two tooth-shaped surfaces, and the intermediate gear (5) is meshed with the tooth-shaped surface of one brake shoe (2) which is in contact with the intermediate gear; the rocker shaft gear (70101) is also meshed with the tooth-shaped surface of the other brake shoe (2) which is in contact with the rocker shaft gear; the intermediate gear (5) and the rocker shaft gear (70101) are meshed with each other, the intermediate gear (5) is sleeved on the rotating shaft (6) and can rotate around the rotating shaft, the rotating shaft (6) is fixedly installed on the shell (1), the rocker shaft gear (70101) is a part of the structure of the rocker shaft (701) of the brake rocker arm assembly (7), and when the rocker shaft (701) rotates, the pair of brake shoe pieces (2) are driven to rotate around the rotating shaft through a mechanical meshing relationship to form opening and closing motions, so that the brake function is achieved. Compared with the prior art, the novel brake cam has the advantages that the novel structural design that the brake rocker shaft drives the gear and the tooth-shaped surface to rotate so as to drive the brake shoe to complete braking is adopted, so that the brake mechanism is more labor-saving to operate, the brake torque is increased, the brake effect is better, and the problem that the original brake cam is easy to wear is solved.
Drawings
Fig. 1 is a schematic structural view of the present invention, and fig. 2 is a schematic structural view of a brake rocker shaft. In the figure, 1 is a shell, 2 is a pair of brake shoes, 3 is a rotating shaft of the pair of brake shoes, 4 is an elastic reset element, 5 is an intermediate gear, 6 is a rotating shaft of the intermediate gear, 7 is a brake rocker arm assembly, and 701 is a part in the brake rocker arm assembly: rocker shaft, 70101 is the partial structure on the rocker shaft: a rocker shaft gear.
The specific implementation mode is as follows:
the technical solution of the present invention will be described more fully below with reference to the following embodiments of the present invention, but the described embodiments are only a part of the present invention, that is, the present invention includes, but is not limited to, the embodiments. The following description of the exemplary embodiment(s) is merely illustrative and is not intended to limit the invention, its application, or uses. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application are not new inventions outside the present invention without creative efforts.
Examples
As shown in the attached drawings 1 and 2, a pair of brake shoes (2) are installed in a shell (1), an elastic reset element (4) is connected between the brake shoes (2), and one ends of the pair of brake shoes (2) are respectively provided with a semi-arc surface and are installed on a rotating shaft (3) and can rotate around the rotating shaft (3). The rotating shaft (3) is fixedly arranged on the shell (1). The other ends of the pair of brake shoes (2) are respectively made into concave tooth-shaped surfaces, and an intermediate gear (5) and a rocker shaft gear (70101) are arranged between the two concave tooth-shaped surfaces. Wherein, the intermediate gear (5) is meshed with the tooth-shaped surface of one brake shoe (2) which is contacted with the intermediate gear, the rocker shaft gear (70101) is also meshed with the tooth-shaped surface of the other brake shoe (2) which is contacted with the rocker shaft gear (70101), and the intermediate gear (5) is meshed with the rocker shaft gear (70101). The intermediate gear (5) is sleeved on the rotating shaft (6) and can rotate around the rotating shaft, and the rotating shaft (6) is fixedly arranged on the shell (1). The rocker shaft gear (70101) is part of the structure of the rocker shaft (701) of the brake rocker arm assembly (7). When the rocker shaft (701) rotates, the pair of brake shoes (2) are driven to rotate around the shaft through the mechanical meshing relationship to form opening and closing motions, so that the brake function is achieved.
Advantageous effects
The invention has the advantages that the gear meshing transmission replaces the original cam structure, so that the brake mechanism is more labor-saving in operation, the brake torque is increased, the brake effect is better, and the problem that the original brake cam is easy to wear is solved.
Claims (1)
1. The utility model provides an improved structure is stopped to drum, by shell (1), locate a pair of brake shoes (2) in shell (1), install on shell (1) pivot (3) of brake shoes (2), connect elasticity reset element (4) between brake shoes (2), brake rocking arm subassembly (7), the pivot (6) of intermediate gear (5), intermediate gear (5) of clamp between a pair of brake shoes (2) constitute, its characterized in that: one end of each of the pair of brake shoes (2) is provided with a semicircular arc surface, is arranged on the rotating shaft (3) and can rotate around the rotating shaft (3), the rotating shaft (3) is fixedly arranged on the shell (1), the other end of each of the pair of brake shoes (2) is respectively made into an inwards concave tooth-shaped surface, an intermediate gear (5) and a rocker shaft gear (70101) are arranged between the two tooth-shaped surfaces, and the intermediate gear (5) is meshed with the tooth-shaped surface of one brake shoe (2) which is in contact with the intermediate gear; the rocker shaft gear (70101) is also meshed with the tooth-shaped surface of the other brake shoe (2) which is in contact with the rocker shaft gear; the intermediate gear (5) and the rocker shaft gear (70101) are meshed with each other, the intermediate gear (5) is sleeved on the rotating shaft (6) and can rotate around the rotating shaft, the rotating shaft (6) is fixedly installed on the shell (1), the rocker shaft gear (70101) is a part of the structure of the rocker shaft (701) of the brake rocker arm assembly (7), when the rocker shaft (701) rotates, a pair of brake shoes are driven to rotate around the rotating shaft, and therefore the pair of brake shoes generate opening and closing motions, and the brake function is achieved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110434266.7A CN113027944A (en) | 2021-04-13 | 2021-04-13 | Improved drum brake structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110434266.7A CN113027944A (en) | 2021-04-13 | 2021-04-13 | Improved drum brake structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113027944A true CN113027944A (en) | 2021-06-25 |
Family
ID=76457281
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110434266.7A Pending CN113027944A (en) | 2021-04-13 | 2021-04-13 | Improved drum brake structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113027944A (en) |
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2021
- 2021-04-13 CN CN202110434266.7A patent/CN113027944A/en active Pending
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