CN208153582U - A kind of drum brake - Google Patents
A kind of drum brake Download PDFInfo
- Publication number
- CN208153582U CN208153582U CN201820515941.2U CN201820515941U CN208153582U CN 208153582 U CN208153582 U CN 208153582U CN 201820515941 U CN201820515941 U CN 201820515941U CN 208153582 U CN208153582 U CN 208153582U
- Authority
- CN
- China
- Prior art keywords
- brake
- shoe
- locating rod
- cam
- drum
- 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.)
- Expired - Fee Related
Links
Abstract
The utility model discloses a kind of drum brakes, it is characterized in that braking top is equipped with a positioning rod, one end of first, second brake-shoe is resisted against on cam, and the other end is arranged close to locating rod, and one is also removably connected in locating rod for compressing the briquetting of the first, second brake-shoe；When friction plate is thinning after long term wear, operator is by unclamping briquetting, after increasing the distance between the first, second brake-shoe and locating rod, briquetting is set to compress the first, second brake-shoe again, the center of rotation of the first, second brake-shoe can be made to be displaced outwardly in this way, the position that then friction plate of the first, second brake-shoe outer rim is contacted with brake rim changes, and so that friction plate is failed the position contacted with brake rim originally and is used.The drum brake of the utility model can adjust the center of rotation of brake-shoe according to the thickness of friction plate, maximize the usage degree of friction plate.
Description
Technical field
The utility model relates to a kind of brake system technical fields more particularly to a kind of for electric vehicle or the drum of motorcycle
It stops.
Background technique
Drum brake is also referred to as drum brake, by being pressed on brake-shoe by brake strip using brake transmission mechanism
On the inside of brake drum, to generate frictional force to the brake drum of vehicle wheel rotation, wheel is made to slow down or in the shortest distance as needed
Interior parking, to ensure traffic safety.
Current drum brake structure generally comprises the brake-shoe that two outer rims are equipped with friction plate, and two brake-shoes are symmetrically set
It sets, one end of brake-shoe is fixed in braking top by fixed pin, and the other end is resisted against the convex of braking top due to the effect of spring
On wheel；When the torque arm driving cam that brakes rotates, cam swings out brake-shoe, contacts the friction plate of brake-shoe outer rim and stops
The inner edge of vehicle drum, makes brake rim stop operating.
Since brake-shoe can only be swung by axis of fixed pin, and the position of fixed pin is immovable, so on brake-shoe
Friction plate can only have sub-fraction to rub with brake rim；When the friction plate of the part is thinning because making abrasion for a long time, vehicle
Master generally will do it more renewal of facing renewal due to safety concerns, abandons friction plate i.e. in the case where still remaining certain thickness, makes
At waste.In addition, the friction plate of exhaust gas is also unfavorable for recycling, it is easy to pollute social environment.
Utility model content
The purpose of the utility model is to provide a kind of drum brake, which can adjust brake-shoe according to the thickness of friction plate
Center of rotation maximizes the usage degree of friction plate.
To achieve the goals above, the technical solution of the utility model is：
A kind of drum brake, including brake rim, braking top, cam, the first brake-shoe and the second brake-shoe, and with the cam
The brake torque arm of connection；The outer rim of first brake-shoe and the second brake-shoe is equipped with friction plate, the first brake-shoe and the second braking
It is connected between hoof by elastic element, further includes：It is connected to the locating rod of the braking top；First brake-shoe and the second system
Dynamic hoof is symmetrically set, and one end of first brake-shoe and the second brake-shoe is resisted against on the cam, and the other end leans on
The nearly locating rod setting；The locating rod is removably connected with a briquetting, and the briquetting compresses first brake-shoe and the
Two brake-shoes.
Further, which further includes：Increment casing.
When having certain distance between first brake-shoe and the second brake-shoe and the locating rod, the increment casing
It is sheathed in the locating rod, prevents first brake-shoe and the second brake-shoe mobile close to the locating rod.
As a kind of specific embodiment, the length of the brake torque arm is 10-20 centimetres.
As a kind of specific embodiment, the shape of the cam is cuboid, when first brake-shoe and second are made
When dynamic hoof is in initial position, first brake-shoe and the second brake-shoe are resisted against on the longer side of the cam.
As a kind of specific embodiment, first brake-shoe and the second brake-shoe are set close to one end of the locating rod
There is circular groove, the shape of the circular groove and the shape of the locating rod match.
As a kind of specific embodiment, first brake-shoe and the second brake-shoe are arranged close to one end of the cam
There is wear plate.
As a kind of specific embodiment, the elastic element includes：First spring and second spring, first spring
It is arranged close to the cam, the second spring is arranged close to the locating rod.
Compared with prior art, the utility model has the following technical effects：
The drum brake of the utility model, braking top are equipped with a positioning rod, and one end of the first, second brake-shoe is resisted against convex
On wheel, the other end is arranged close to locating rod, and one is also removably connected in locating rod for compressing the pressure of the first, second brake-shoe
Block；When friction plate is thinning after long term wear, operator makes the first, second brake-shoe and locating rod by unclamping briquetting
The distance between increase after, then briquetting is made to compress the first, second brake-shoe, in the rotation that the first, second brake-shoe can be made in this way
The heart is displaced outwardly, then the position that the friction plate of the first, second brake-shoe outer rim is contacted with brake rim changes, and keeps friction plate former
Originally failing the position contacted with brake rim can be used.
Further, after the distance between the first, second brake-shoe and locating rod increase, the first, second brake-shoe exists
It is easy when being resetted under the pulling force effect of elastic element to the movement of the direction of locating rod, so adding an increment set on the securing lever
Pipe, and the increment casing according to the distance between brake-shoe and locating rod size and using different-thickness, make the first, second system
Space between dynamic hoof and locating rod is filled, and will not be relatively moved between the first, second brake-shoe and locating rod.
Further, in order to save active force when brake, the length for torque arm of braking is 10-20 centimetres.
Further, in order to avoid after because being used for a long time, brake-shoe and cam are worn after long-term sliding friction, the
One brake-shoe and the second brake-shoe are provided with wear plate close to one end of cam.
In order to better understand and implement, according to the present invention will be described in detail below with reference to the accompanying drawings.
Detailed description of the invention
Fig. 1 is the front view of the drum brake of the utility model；
Fig. 2 is the rearview of the drum brake of the utility model；
Fig. 3 is first, second brake-shoe of the utility model and the connection schematic diagram of braking top；
Fig. 4 is the structural schematic diagram of the first brake-shoe.
Specific embodiment
Embodiment 1
A kind of drum brake referring to FIG. 1-2, including brake rim 1, braking top 2, cam 3, the first brake-shoe 4 and the second braking
Hoof 5, and the brake torque arm 6 being connect with cam 3；The outer rim of first brake-shoe 4 and the second brake-shoe 5 is equipped with friction plate 7, the
It is connected between one brake-shoe 4 and the second brake-shoe 5 by elastic element, further includes：It is connected to the locating rod 8 of braking top 2；First
Brake-shoe 4 and the second brake-shoe 5 are symmetrically set, and one end of the first brake-shoe 4 and the second brake-shoe 5 is resisted against cam 3
On, the other end is arranged close to locating rod 8；The locating rod 8 is removably connected with a briquetting, and the briquetting compresses the first brake-shoe
4 and second brake-shoe 5.
Wherein, as an implementation, briquetting can be with locating rod 8 and be threadedly coupled, and briquetting is by a nut 9 and one
A gasket 10 forms；The radius of gasket 10 is greater than the first brake-shoe 4 and the second brake-shoe 5 arrives the distance of 8 axis of locating rod, nut
9 are threadedly coupled with locating rod 8, and gasket 10 is made to compress the first, second brake-shoe.
It should be noted that above-mentioned specific embodiment is not meant to limit the structure or construction of briquetting.
Specifically, the length of brake torque arm 6 is 10-20 centimetres.
Specifically, the first brake-shoe 4 and the second brake-shoe 5 are equipped with circular groove 11, circular arc close to one end of locating rod 8
The shape of connected in star 11 and the outer rim of locating rod 8 match.
Specifically, the first brake-shoe 4 and the second brake-shoe 5 are provided with wear plate 12 close to one end of cam 3.
Specifically, the shape of cam 3 is cuboid, when the first brake-shoe 4 and the second brake-shoe 5 are in initial position,
First brake-shoe 4 and the second brake-shoe 5 are resisted against on the longer side of cam 3.
Specifically, the elastic element includes：First spring 13 and second spring 14, first spring 13 is close to described
Cam 3 is arranged, and the second spring 14 is arranged close to the locating rod 8.
Preferably, which further includes：Increment casing 15.
Increment casing 15 can be that multiple internal diameters are identical, but the metal sleeve that thickness is different.Operator is according to first,
The distance between two brake-shoes and locating rod choose the metal sleeve of respective thickness, are arranged on the securing lever, and increment is made to cover tube top
It leans against on the first, second brake-shoe, prevents the first, second brake-shoe under the pulling force effect of second spring, to locating rod direction
It is mobile.
The utility model is not limited to above embodiment, if the various changes or deformation to the utility model do not take off
Spirit and scope from the utility model, if these changes and deformation belong to the claims and equivalents of the utility model
Within the scope of, then the utility model is also intended to encompass these changes and deformation.
Claims (7)
1. a kind of drum brake, including brake rim, braking top, cam, the first brake-shoe and the second brake-shoe, and connect with the cam
The brake torque arm connect；The outer rim of first brake-shoe and the second brake-shoe is equipped with friction plate, the first brake-shoe and the second brake-shoe
Between pass through elastic element connect, which is characterized in that further include：
It is connected to the locating rod of the braking top；
First brake-shoe and the second brake-shoe are symmetrically set, and one end of first brake-shoe and the second brake-shoe
It is resisted against on the cam, the other end is arranged close to the locating rod；
The locating rod is removably connected with a briquetting, and the briquetting compresses first brake-shoe and the second brake-shoe.
2. drum brake according to claim 1, which is characterized in that further include：
Increment casing；
When having certain distance between first brake-shoe and the second brake-shoe and the locating rod, the increment casing is arranged
In in the locating rod, preventing first brake-shoe and the second brake-shoe mobile close to the locating rod.
3. drum brake according to claim 1, it is characterised in that：
The length of the brake torque arm is 10-20 centimetres.
4. drum brake according to claim 1, it is characterised in that：
The shape of the cam is cuboid, when first brake-shoe and the second brake-shoe are in initial position, described the
One brake-shoe and the second brake-shoe are resisted against on the longer side of the cam.
5. drum brake according to claim 1, it is characterised in that：
First brake-shoe and the second brake-shoe are equipped with circular groove close to one end of the locating rod, described arc-shaped recessed
The shape of slot and the shape of the locating rod match.
6. drum brake according to claim 1, it is characterised in that：
First brake-shoe and the second brake-shoe are provided with wear plate close to one end of the cam.
7. drum brake according to claim 1, it is characterised in that：
The elastic element includes：First spring and second spring, first spring are arranged close to the cam, and described second
Spring is arranged close to the locating rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820515941.2U CN208153582U (en) | 2018-04-11 | 2018-04-11 | A kind of drum brake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820515941.2U CN208153582U (en) | 2018-04-11 | 2018-04-11 | A kind of drum brake |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208153582U true CN208153582U (en) | 2018-11-27 |
Family
ID=64377676
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820515941.2U Expired - Fee Related CN208153582U (en) | 2018-04-11 | 2018-04-11 | A kind of drum brake |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208153582U (en) |
-
2018
- 2018-04-11 CN CN201820515941.2U patent/CN208153582U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181127 Termination date: 20200411 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |