CN110925337A - Drum brake with traditional fixed spring hanging mode changed - Google Patents
Drum brake with traditional fixed spring hanging mode changed Download PDFInfo
- Publication number
- CN110925337A CN110925337A CN201911284610.8A CN201911284610A CN110925337A CN 110925337 A CN110925337 A CN 110925337A CN 201911284610 A CN201911284610 A CN 201911284610A CN 110925337 A CN110925337 A CN 110925337A
- Authority
- CN
- China
- Prior art keywords
- shoe
- brake shoe
- brake
- pin shaft
- spring
- 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
- F16D65/00—Parts or details
- F16D65/02—Braking members; Mounting thereof
- F16D65/04—Bands, shoes or pads; Pivots or supporting members therefor
- F16D65/08—Bands, shoes or pads; Pivots or supporting members therefor for internally-engaging brakes
- F16D65/09—Pivots or supporting members therefor
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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
- F16D51/32—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 three or more brake shoes
- F16D51/34—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 three or more brake shoes extending in opposite directions from their pivots
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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
- F16D65/02—Braking members; Mounting thereof
- F16D2065/13—Parts or details of discs or drums
- F16D2065/134—Connection
- F16D2065/1392—Connection elements
- F16D2065/1396—Ancillary resilient elements, e.g. anti-rattle or retraction springs
Abstract
A drum brake for changing a traditional spring-fixing and spring-hanging mode comprises a bottom plate, a dust cover, a first brake shoe and a second brake shoe, wherein the first brake shoe and the second brake shoe are symmetrically arranged on two sides of the bottom plate, a first roller and a second roller are respectively arranged on the first brake shoe and the second brake shoe, a cam shaft is arranged on the bottom plate, a reset part is arranged between the first brake shoe and the second brake shoe, the reset part comprises a first reset part and a second reset part, the first reset part is arranged between the first brake shoe and the second brake shoe and is close to one end of a first shoe pin shaft and one end of a second shoe pin shaft, and the second reset part is arranged at one end, far away from the first shoe pin shaft and one end of the second shoe pin shaft, of the first; the center line of the first resetting piece is positioned on one side of a connecting line of the midpoints of the first shoe pin shaft and the second shoe pin shaft, which is close to the center of the circle of the base plate. The central line of the resetting piece is arranged on one side, close to the circle center of the bottom plate, of the connecting line of the midpoints of the first shoe pin shaft and the second shoe pin shaft, so that automatic braking of the brake can be effectively avoided when the resetting piece fails, and the risk of vehicle runaway is reduced.
Description
Technical Field
The invention relates to the technical field of vehicle braking systems, in particular to a drum brake for changing the traditional fixed spring hanging manner.
Background
Drum brakes, also called block brakes, are used to brake by pressing brake blocks against brake wheels. Drum brakes are early designs of brake systems, and the design of the brake drum is already used on a carriage in 1902 years, and the brake drum is not started to be widely applied in the automobile industry until about 1920 years. The main stream of the drum brake is of an inward-expanding type, and a brake block (brake shoe) of the drum brake is positioned on the inner side of a brake wheel, and the brake block is expanded outwards to rub the inner side of the brake wheel during braking, so that the purpose of braking is achieved. In the last thirty years, drum brakes have gradually been moved out of the way to disc brakes in the passenger car sector. But still used in some economical cars due to low cost, mainly used for rear wheels with small braking load and parking brake.
However, in the existing drum brake, the original spring hanging mode easily causes the two shoes to open under the action of the fixed spring force to cause automatic braking when the return spring fails.
Disclosure of Invention
The invention aims to: a drum brake is provided which changes the conventional fixed spring hanging manner.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a drum brake capable of changing a traditional fixed spring hanging manner comprises a bottom plate, a dust cover fixedly connected with the bottom plate, a first brake shoe and a second brake shoe which are symmetrically arranged on two sides of the bottom plate, wherein one ends of the first brake shoe and the second brake shoe, which correspond to each other, are rotatably connected with the bottom plate through a first shoe pin shaft and a second shoe pin shaft respectively;
a reset piece is arranged between the first brake shoe and the second brake shoe, and comprises a first reset piece and a second reset piece, wherein the first reset piece is arranged between the first brake shoe and the second brake shoe and is close to one end of a first shoe pin shaft and one end of a second shoe pin shaft, and the second reset piece is arranged at one end, far away from the first shoe pin shaft and the second shoe pin shaft, of the first brake shoe and the second brake shoe;
the center line of the first resetting piece is positioned on one side, close to the center of the bottom plate, of a connecting line of the midpoints of the first shoe pin shaft and the second shoe pin shaft.
Furthermore, first piece that resets include two first return springs and the second return spring that are located same vertical face, first brake shoe on be equipped with first hanging spring post and second hanging spring post, the second brake shoe on be equipped with third hanging spring post and fourth hanging spring post, first hanging spring post and third hanging spring post be used for hanging first return spring, second hanging spring post and fourth hanging spring post be used for hanging second return spring.
Furthermore, the first hanging spring column and the second hanging spring column are respectively and fixedly connected with the upper end face and the lower end face of the first brake shoe, the axial leads of the first hanging spring column and the second hanging spring column are overlapped, the third hanging spring column and the fourth hanging spring column are respectively and fixedly connected with the upper end face and the lower end face of the second brake shoe, and the axial leads of the third hanging spring column and the fourth hanging spring column are overlapped.
Furthermore, the second reset piece comprises a third return spring, a fifth hanging spring column is arranged on the first brake shoe, a sixth hanging spring column is arranged on the second brake shoe, and the fifth hanging spring column and the sixth hanging spring column are used for hanging the third return spring.
Furthermore, a bushing is arranged between the cam shaft and the bottom plate.
Furthermore, the friction plates are provided with four blocks including a first friction plate and a second friction plate which are arranged on the first brake shoe, and a third friction plate and a fourth friction plate which are arranged on the second brake shoe.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
according to the semi-open brake changing the traditional spring hanging mode of the fixed spring, the center line of the reset piece is arranged on one side, close to the circle center of the bottom plate, of the connecting line of the midpoints of the first shoe pin shaft and the second shoe pin shaft, so that the brake can be effectively prevented from automatically braking when the reset piece fails, and the risk of vehicle runaway is reduced.
Drawings
FIG. 1 is a front view of the present invention;
FIG. 2 is a first perspective view of the present invention with the camshaft removed;
FIG. 3 is a second perspective view of the present invention with the camshaft removed;
in the drawings: 1-a bottom plate; 2-a dust cover; 3-a first brake shoe; 4-a second brake shoe; 5-a first shoe pin; 6-a second shoe pin; 7-a first friction plate; 8-a second friction plate; 9-a third friction plate; 10-a fourth friction plate; 11-a first roller; 12-a second roller; 13-a camshaft; 14-a first return spring; 15-a second return spring; 16-a first hanging spring column; 17-a second suspension spring post; 18-a third hanging spring column; 19-a fourth hanging spring column; 20-a third return spring; 21-fifth hanging spring column; 22-sixth hanging spring post; 23-bushing.
Detailed Description
Embodiments of the present invention are further described below with reference to the accompanying drawings.
A drum brake capable of changing a traditional fixed spring hanging spring mode comprises a bottom plate 1 and a dust cover 2 fixedly connected with the bottom plate 1, wherein a first brake shoe 3 and a second brake shoe 4 are symmetrically arranged on two sides of the bottom plate 1, one ends, corresponding to the first brake shoe 3 and the second brake shoe 4, of the first brake shoe 3 are rotatably connected with the bottom plate 1 through a first shoe pin shaft 5 and a second shoe pin shaft 6 respectively, and friction plates are fixedly connected to the first brake shoe 3 and the second brake shoe 4 respectively. A first roller 11 and a second roller 12 are respectively mounted on the first brake shoe 3 and the second brake shoe 4, a cam shaft 13 is mounted on the bottom plate 1, and a bushing 23 is further arranged between the cam shaft 13 and the bottom plate 1 in the embodiment. The first roller 11 and the second roller 12 are in contact with the camshaft 13. Through the rotation of the cam shaft 13, the first brake shoe 3 and the second brake shoe 4 are pushed to rotate around the first shoe pin shaft 5 and the second shoe pin shaft 6 respectively, so that the first brake shoe 3 and the second brake shoe 4 are expanded outwards, the first friction plate 7, the second friction plate 8, the third friction plate 9 and the fourth friction plate 10 are in contact with a wheel hub, and braking force is generated to brake.
A reset piece is arranged between the first brake shoe 3 and the second brake shoe 4, and comprises a first reset piece and a second reset piece, wherein the first reset piece is arranged between the first brake shoe 3 and the second brake shoe 4 and close to one ends of the first shoe pin shaft 5 and the second shoe pin shaft 6, and the second reset piece is arranged at one ends of the first brake shoe 3 and the second brake shoe 4 far away from the first shoe pin shaft 5 and the second shoe pin shaft 6; the central line of the first resetting piece is positioned on one side of a connecting line of the midpoints of the first shoe pin shaft 5 and the second shoe pin shaft 6, which is close to the circle center of the bottom plate 1. In this embodiment, the first restoring member includes a first restoring spring 14 and a second restoring spring 15 located on the same vertical plane, a first hanging spring column 16 and a second hanging spring column 17 are disposed on the first brake shoe 3, a third hanging spring column 18 and a fourth hanging spring column 19 are disposed on the second brake shoe 4, the first hanging spring column 16 and the third hanging spring column 18 are used for hanging the first restoring spring 14, and the second hanging spring column 17 and the fourth hanging spring column 19 are used for hanging the second restoring spring 15. In the present embodiment, the first and second suspension spring columns 16 and 17 are fixedly connected to the upper and lower end surfaces of the first brake shoe 3, respectively, the axial lines of the first and second suspension spring columns 16 and 17 coincide with each other, the axial lines of the third and fourth suspension spring columns 18 and 19 are fixedly connected to the upper and lower end surfaces of the second brake shoe 4, respectively, and the axial lines of the third and fourth suspension spring columns 18 and 19 coincide with each other.
In this embodiment, the second restoring element includes a third return spring 20, a fifth spring hanging column 21 is disposed on the first brake shoe 3, a sixth spring hanging column 22 is disposed on the second brake shoe 4, and the fifth spring hanging column 21 and the sixth spring hanging column 22 are used for hanging the third return spring 20.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (6)
1. The utility model provides a change drum brake of traditional fixed spring hanging spring mode which characterized in that: the brake shoe comprises a bottom plate and a dust cover fixedly connected with the bottom plate, wherein a first brake shoe and a second brake shoe are symmetrically arranged on two sides of the bottom plate, one ends of the first brake shoe and the second brake shoe, which correspond to each other, are respectively and rotatably connected with the bottom plate through a first shoe pin shaft and a second shoe pin shaft, friction plates are respectively and fixedly connected onto the first brake shoe and the second brake shoe, a first roller and a second roller are respectively arranged on the first brake shoe and the second brake shoe, a cam shaft is arranged on the bottom plate, and the first roller and the second roller are in contact with the cam shaft;
a reset piece is arranged between the first brake shoe and the second brake shoe, and comprises a first reset piece and a second reset piece, wherein the first reset piece is arranged between the first brake shoe and the second brake shoe and is close to one end of a first shoe pin shaft and one end of a second shoe pin shaft, and the second reset piece is arranged at one end, far away from the first shoe pin shaft and the second shoe pin shaft, of the first brake shoe and the second brake shoe;
the center line of the first resetting piece is positioned on one side, close to the center of the bottom plate, of a connecting line of the midpoints of the first shoe pin shaft and the second shoe pin shaft.
2. The drum brake according to claim 1, wherein the first restoring member includes a first restoring spring and a second restoring spring located on a same vertical surface, the first brake shoe has a first suspension spring post and a second suspension spring post, the second brake shoe has a third suspension spring post and a fourth suspension spring post, the first suspension spring post and the third suspension spring post are used for suspending the first restoring spring, and the second suspension spring post and the fourth suspension spring post are used for suspending the second restoring spring.
3. A drum brake according to claim 2, wherein said first and second suspension spring columns are fixedly connected to the upper and lower end surfaces of said first brake shoe, respectively, the axial lines of said first and second suspension spring columns coincide, said third and fourth suspension spring columns are fixedly connected to the upper and lower end surfaces of said second brake shoe, respectively, and the axial lines of said third and fourth suspension spring columns coincide.
4. The drum brake according to claim 1, wherein the second restoring member includes a third return spring, the first brake shoe has a fifth suspension spring leg, the second brake shoe has a sixth suspension spring leg, and the fifth and sixth suspension spring legs are configured to suspend the third return spring.
5. A drum brake according to claim 1, in which a bush is provided between the cam shaft and the base plate.
6. A drum brake according to claim 1 in which there are four friction plates, including a first friction plate and a second friction plate on a first shoe, and a third friction plate and a fourth friction plate on a second shoe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911284610.8A CN110925337A (en) | 2019-12-13 | 2019-12-13 | Drum brake with traditional fixed spring hanging mode changed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911284610.8A CN110925337A (en) | 2019-12-13 | 2019-12-13 | Drum brake with traditional fixed spring hanging mode changed |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110925337A true CN110925337A (en) | 2020-03-27 |
Family
ID=69860435
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911284610.8A Pending CN110925337A (en) | 2019-12-13 | 2019-12-13 | Drum brake with traditional fixed spring hanging mode changed |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110925337A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113833778A (en) * | 2021-10-08 | 2021-12-24 | 山东力得汽车科技股份有限公司 | Single-shoe pin brake |
-
2019
- 2019-12-13 CN CN201911284610.8A patent/CN110925337A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113833778A (en) * | 2021-10-08 | 2021-12-24 | 山东力得汽车科技股份有限公司 | Single-shoe pin brake |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20200327 |