CN202597555U - Parking brake - Google Patents
Parking brake Download PDFInfo
- Publication number
- CN202597555U CN202597555U CN 201220111617 CN201220111617U CN202597555U CN 202597555 U CN202597555 U CN 202597555U CN 201220111617 CN201220111617 CN 201220111617 CN 201220111617 U CN201220111617 U CN 201220111617U CN 202597555 U CN202597555 U CN 202597555U
- Authority
- CN
- China
- Prior art keywords
- brake
- parking
- braking
- bottom board
- boss
- 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 - Lifetime
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Abstract
The utility model discloses a parking brake which comprises a brake bottom plate. Six bosses are evenly arranged around the circumference of the upper plane of the brake bottom plate, a left brake shoe and a right brake shoe are disposed on the bosses and connected with the brake bottom plate in a rotating mode, the brake bottom plate and the bosses are of an integrated casting structure, and the top end planes of the bosses are machining planes. According to the parking brake, the brake bottom plate is cast by QT450-10 cast iron in an integrated mode and then subjected to machining to obtain the required parking brake, accordingly, planeness of the six small bosses can be well controlled, and degrees of parallelism of the boss top end planes and the installation base plane can be guaranteed. The size of the machined parking brake is easier to control than prior parking brakes which are formed by stamping, follow-up reshaping molds are not required, and strict requirements for devices are not required so that production costs are saved.
Description
Technical field
The utility model relates to a kind of parking braking system.
Background technique
Parking braking generally also can be called parking brake, and its effect is exactly a resistance to the automobile of our stagnation of movement to be provided, make automobile can be in the original place (be included in 20%～30% slope on) resident motionless.Parking braking system, parking brake that just is commonly called as or the park in the automatic transmission pin the trailing wheel of transmission shaft or automobile, and parking braking are littler than the power of service brake, and its purpose just makes automobile can be parked in the original place slope do not take place to slip.The slope takes place to slip and causes contingency because Parking power is not enough under operator cabin nobody's situation in the automobile of avoiding stagnation of movement.
When the service braking sytem of automobile unexpected situation occurs and can't brake; Run into the effect that the drum brake of trailing wheel in emergency circumstances also can play auxiliary braking; Make the traveling automobile last safe stagnation of movement that can slow down gradually; But this has proposed higher designing requirement to our intensity of drum brake global design, especially braking bottom board.
Our foundation drum brake assembly commonly used now mainly is to be welded by several block plates.Because bounce-back in various degree can occur after some steel plate component impact briquetting, cause the whole parallelism of braking bottom board overproof like this.Along with press tool is elongated service time, consistency of product also is difficult to guarantee.
The caliper assembly of back drum brake is mounted on the braking bottom board, if but eccentric wear, shake, brake pad and brake disc minimizing in working life appear in the overproof or bad decreased performance that directly causes brake caliper assy of conformity of our product parallelism.
Steel plate itself has certain elasticity, when brake calipers in when braking, if the strength deficiency of steel plate, brake calipers caliper total performance when braking can be swung back so, the need liquid measure of whole braking system will increase, and forces piston further to move forward.Brake the soft and soggy braking pedal stroke of automobile that makes and strengthen, cause the lengthening of stopping distance, thereby cause contingency.
Our the braking bottom board technology used always is that base plate and dust guard are fixed together through spot welding or stove bolt in addition, carries out integral surface again and handles.Stressed owing to brake calipers when braking when the braking bottom board assembly, steel plate will produce distortion to a certain degree, causes base plate and dust guard to produce the friction-produced noise.
The model utility content
The utility model technical problem to be solved just provides a kind of Parking Brake; Its design object is that the braking bottom board bulk deformation is little, the machining accuracy of low cost of manufacture, product is controlled easily, consistency of product can guarantee, Braking efficiency stable, but final product bulk strength needed intensity can satisfy Parking the time and during emergency braking.
For solving the problems of the technologies described above; The utility model adopts following technological scheme: a kind of Parking Brake; Comprise braking bottom board, it is characterized in that: planar circumferential evenly is provided with six boss on the said braking bottom board ring, about two brake shoes place on the boss and and be rotationally connected with braking bottom board; Said braking bottom board and boss are the cast inblock structure, and plane, said boss top is the machining plane.
As preferably, said braking bottom board and boss are QT450-10 cast iron cast inblock structure.
As preferably, socket supported spring on the said boss, supported spring elastic support brake shoe.
As preferably, said braking bottom board and about be provided with spring sheet between the attachment face of two brake shoes.
This kind of braking bottom board of the utility model is to adopt the cast inblock of QT450-10 cast iron, obtains needed finished product through machining again.The planeness of six small boss of product can be controlled like this well, and the parallelism with datum clamp face can be guaranteed.Product machining dimension ratio is the easier control size of product (impact briquetting) in the past, does not need the shaping mould of postorder, does not need strict requirement to save cost of production to equipment.Press tool can not be controlled the precision of product along with the prolongation of service time effectively, and the operation that needs has increased the input cost of equipment more than casting.And can produce bigger noise during the assembly punching press of product, do not meet the environmental requirement that country advocates.
This kind of drum brake can provide the service brake performance in vehicle traveling process.Because automobile in motion, big this of the inertia ratio of vehicle just needs bigger braking force, thereby break overall performance and intensity are had higher requirement.Because spheroidal graphite cast iron (QT450-10) has good intensity and specific elongation, I take charge of and adopt cast-in-block technology, can effectively prevent the bulk deformation of braking bottom board, guarantee the attachment face of caliper assembly and the parallelism of hub attachment face.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is further described:
Fig. 1 is the utility model vehicle stop brake mechanism schematic representation;
Fig. 2 is a parking braking swing arm assembly structure schematic representation;
Fig. 3 is a parking braking force analysis schematic representation;
Fig. 4 is a supported spring installed position sectional view;
Fig. 5 is a supported spring mounting structure schematic representation;
Fig. 6 is the braking bottom board structural representation.
Embodiment
Specify the Parking Brake of the utility model below in conjunction with Fig. 1 to Fig. 6; Comprise braking bottom board 1; The flat circle side face evenly is provided with six boss 14 on the said braking bottom board ring; About two brake shoes 7 place on the boss and and be rotationally connected with braking bottom board, said braking bottom board and boss are a cast inblock structure, and plane, said boss top is the machining plane.Said braking bottom board and boss are QT450-10 cast iron cast inblock structure.Socket supported spring 10 on the said boss, supported spring elastic support brake shoe 7.Said parking braking base plate 1 and about be provided with spring sheet 3 between the attachment face of two brake shoes 7.
As shown in the figure, the automotive brake assembly comprises: braking bottom board 1, return spring 2, spring sheet 3, parking braking swing arm assembly 4, pressure hoof spring 5, position-limitting pin 6, brake shoe 7, adjustment ratchet 8, retaining spring 9, supported spring 10.Parking braking swing arm assembly comprises: parking braking pull bar 11, pin 12, parking brake push rod 13.
During parking braking, the Parking drag-line is along the direction pulling Parking pull bar 11 of F power, and pull bar makes the thrust of the upper end generation P1 of Parking pull bar 11 around pin rotation (lever principle), forces the right-hand member of the moving ratchet assembly of right side brake shoe coiling to strut.The thrust of P1 makes brake shoe 7 exterior edge faces in right side contact with the brake disc inner side surface, produces the braking moment opposite with wheel.Because active force and reaction force make the thrust of braking swing arm to the trend generation P2 of left movement, outwards strut the brake shoe in left side with the inner side surface of brake disc and contact the generation braking moment, play the effect of Parking.When Parking power was removed, getting back to original position, removed by braking moment left and right sides brake shoe for return spring 2.Along with the brake shoe 7 of both sides weares and teares gradually, we can stir the tooth on the adjustment ratchet 8, let the brake shoe of both sides strut the gap of compensate for wear.
The supported spring 10 of the utility model not only makes the brake shoe of the left and right sides remain on same level height, and can let the brake shoe tensioning eliminate idle stroke, can reduce the reaction time of braking system.
The foregoing description is the explanation to the utility model, is not the qualification to the utility model, any protection domain that scheme after the utility model simple transformation is all belonged to the utility model.
Claims (4)
1. Parking Brake; Comprise braking bottom board (1); It is characterized in that: planar circumferential evenly is provided with six boss (14) on the said braking bottom board ring; About two brake shoes (7) place on the boss and and be rotationally connected with braking bottom board, said braking bottom board and boss are the cast inblock structure, and plane, said boss top is the machining plane.
2. a kind of Parking Brake according to claim 1 is characterized in that: said braking bottom board and boss are QT450-10 cast iron cast inblock structure.
3. a kind of Parking Brake according to claim 1 is characterized in that: socket supported spring (10) on the said boss, supported spring elastic support brake shoe (7).
4. a kind of Parking Brake according to claim 1 is characterized in that: said braking bottom board (1) and about be provided with spring sheet (3) between the attachment face of two brake shoes (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220111617 CN202597555U (en) | 2012-03-22 | 2012-03-22 | Parking brake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220111617 CN202597555U (en) | 2012-03-22 | 2012-03-22 | Parking brake |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202597555U true CN202597555U (en) | 2012-12-12 |
Family
ID=47315100
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220111617 Expired - Lifetime CN202597555U (en) | 2012-03-22 | 2012-03-22 | Parking brake |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202597555U (en) |
-
2012
- 2012-03-22 CN CN 201220111617 patent/CN202597555U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121212 |
|
| CX01 | Expiry of patent term |