CN203879988U - Hydraulic drum brake - Google Patents
Hydraulic drum brake Download PDFInfo
- Publication number
- CN203879988U CN203879988U CN201420270335.0U CN201420270335U CN203879988U CN 203879988 U CN203879988 U CN 203879988U CN 201420270335 U CN201420270335 U CN 201420270335U CN 203879988 U CN203879988 U CN 203879988U
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- CN
- China
- Prior art keywords
- axle sleeve
- brake shoe
- brake
- push mechanism
- shoe iron
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Abstract
The utility model discloses a hydraulic drum brake. The hydraulic drum brake comprises a brake disc, an upper brake shoe and a lower brake shoe, a hydraulic pushing device is arranged between the upper brake shoe and the lower brake shoe and comprises a shell and pistons, the pistons are movably connected to the two ends of the interior of the shell, a hydraulic cavity is formed between the pistons, a reset spring is connected between the pistons, the other end of each piston is movably connected with a pushing component, the pushing components include an upper pushing component and a lower pushing component, one end of the upper pushing component is provided with a first magnet, the first magnet acts on the two ends of the upper brake shoe, and one end of the lower pushing component is provided with a second magnet which acts on the two ends of the lower brake shoe. The hydraulic pushing device serves as an actuating device of the drum brake and applies driving force to the two ends of each brake shoe at the same time, the brake shoes obtain uniform outward expansion force, a brake drum obtains uniform friction force, and the brake effect is direct, stable and reliable.
Description
Technical field
The utility model relates to a kind of drum brake, particularly a kind of hydraulic drum brake.
Background technique
Drum brake is also block brake, is to compress and realize brake on Brake drum by brake slipper.Drum brake is the braking system of early stage design, and the design of its brake drum has just been used on carriage for 1902, until just start in automotive industry extensive use about nineteen twenty.Now the main flow of drum brake is internal tensional type, and its brake slipper (brake shoe) is positioned at Brake drum inner side, and in brake, brake slipper outwards opens, and the inner side of friction catch wheel reaches the object of brake.In nearly 30 years, drum brake progressively exits and makes way for disk type braker on car field.But because cost compare is low, still in some economic class cars, use, be mainly used in the smaller trailing wheel of brake load and parking braking.
The rotatable member of drum brake is brake drum, and fixed element is brake shoe iron.When braking, brake shoe iron is to inner rotary under actuation gear effect, and the friction plate of outer surface presses against on the inner cylindrical surface of brake drum, and drum is produced to friction brake torque, realizes braking process.Existing drum brake, the two ends of brake shoe iron are often stressed irregular, cause the outer tension at two ends not of uniform size.Therefore, the frictional force that the friction plate on brake shoe iron applies brake drum differs, and rubbing surface is inhomogeneous, and braking effect is unstable, needs frequently more renewal of facing renewal, improves the maintenance cost of vehicle.And in the time that driver needs Emergency braking, the outer tension of brake shoe iron differs, braking effect is unreliable, and braking distance is long, has traffic safety hidden danger.
Summary of the invention
The purpose of this utility model is to provide a kind of hydraulic drum brake, adopts the actuation gear of hydraulic pushing device as drum brake, under the impetus of hydraulic pressure, applies Driving force to brake shoe iron two ends simultaneously.Brake shoe iron obtains outer tension uniformly, and brake drum obtains uniform frictional force, and braking effect directly, stable and reliably, braking distance is short, is applicable to Emergency braking.
In order to solve the problems of the technologies described above, adopt following technological scheme:
A kind of hydraulic drum brake, comprise brake disc and brake shoe iron, brake shoe iron includes brake shoe iron and lower brake shoe iron, upper brake shoe iron is located at the left part of brake disc, lower brake shoe iron is located at the right part of brake disc, friction plate has all been riveted in the outer end of the outer end of upper brake shoe iron and lower brake shoe iron, it is characterized in that: between upper brake shoe iron and lower brake shoe iron, be provided with hydraulic pushing device, hydraulic pushing device includes housing and piston, the two ends of enclosure interior are all connected with piston, between piston, be formed with hydraulic pressure cavity, between piston, be connected with Returnning spring, the other end of piston is all connected with push mechanism, push mechanism includes push mechanism and lower push mechanism, one end of upper push mechanism is provided with the first magnet, the first magnet acts on the two ends of brake shoe iron, one end of lower push mechanism is provided with the second magnet, the second magnet acts on the two ends of lower brake shoe iron, the opening of housing is fixed with axle sleeve, and upper push mechanism is all flexibly connected axle sleeve with lower push mechanism.Hydraulic pushing device, taking hydraulic pressure as power source, by hydraulic drive piston movement, and drives push mechanism motion, and Driving force is acted on to brake shoe iron.The impetus power of hydraulic pressure is larger, promote effect stability reliable, and raw material can be recycled, and cost is low.Hydraulic pressure cavity can filling liquid, and forms hydraulic drive piston movement, simple in structure, easy to use.Push mechanism comprises push mechanism and lower push mechanism, upper push mechanism and lower push mechanism can be used respectively the two ends of brake shoe iron and the two ends of lower brake shoe iron, and amount of force is identical, upper brake shoe iron and lower brake shoe iron obtain outer tension uniformly, apply frictional force to brake drum by friction plate, brake drum obtains evenly, stable and powerful friction effect, and braking effect is remarkable, braking distance is short.Returnning spring can provide restoring force, when after end of braking, piston is drawn back to initial position, guarantees to brake accurately next time and carries out.The first magnet and the second magnet can accurately be held the position of push mechanism promotion brake shoe iron on the one hand, avoid dislocation; On the other hand, after end of braking, the first magnet and the second magnet can drive brake shoe iron return, and return speed is fast, avoids occurring unwanted braking effect.Axle sleeve is limit structure, can avoid push mechanism generation slippage, guarantees that each push mechanism working position is accurate.Meanwhile, the mode of flexible connection realizes push mechanism can be movable in axle sleeve, and then reach promotion effect.
Further, on piston, be equipped with limited impression, between limited impression, be connected with Returnning spring.Limited impression limits the position of Returnning spring, avoids Returnning spring to break away, and guarantees stable connection.
Further, the both sides of housing are provided with screw, are connected with bolt on screw, bolt stationary housing.
Further, push mechanism is curved, and upper push mechanism includes the first moving part and the first driving member, and the first moving part and axle sleeve match, and the first moving part is flexibly connected axle sleeve, and the first driving member is provided with the first magnet; Lower push mechanism includes the second moving part and the second driving member, and the second moving part and axle sleeve match, and the second moving part is flexibly connected axle sleeve, and the second driving member is provided with the second magnet.When arcuate structure moves the first moving part and the second moving part outside housing, the distance between the first moving part and the second moving part reduces, thereby impels the first driving member and the second driving member to extending out promotion brake shoe iron.Simple in structure, design ingenious.
Further, axle sleeve includes the first axle sleeve and the second axle sleeve; The first axle sleeve and the first moving part match, and the first axle sleeve is flexibly connected the first moving part, and the second axle sleeve and the second moving part match, and the second axle sleeve is flexibly connected the second moving part.The first moving part moves under the position-limiting action of the first axle sleeve, and in realization, push mechanism promotes upper brake shoe iron; The second moving part moves under the position-limiting action of the second axle sleeve, realizes lower push mechanism and promotes lower brake shoe iron.
Further, between the first axle sleeve and the second axle sleeve, be connected with fixed connecting piece, fixed connecting piece is fixed the first axle sleeve and the second axle sleeve.
Further, piston is provided with chute, in upper push mechanism and lower push mechanism, is equipped with slide block, and chute and slide block match, and slide block is embedded in chute.Slide block can move in chute, realizes the first moving part and the second moving part is drawn close mutually, and then helps the first driving member and the second driving member promotion brake shoe iron.
Further, the inner of opening is provided with cavity, and lubrication pockets is installed in cavity.Lubrication pockets can provide lubricant oil, contributes to reciprocating motion of the pistons smooth and easy.
Owing to adopting technique scheme, there is following technique effect:
The utility model is a kind of hydraulic drum brake, adopts the actuation gear of hydraulic pushing device as drum brake, under the impetus of hydraulic pressure, applies Driving force to brake shoe iron two ends simultaneously.Brake shoe iron obtains outer tension uniformly, and brake drum obtains uniform frictional force, and braking effect directly, stable and reliably, braking distance is short, is applicable to Emergency braking.
Hydraulic pushing device, taking hydraulic pressure as power source, by hydraulic drive piston movement, and drives push mechanism motion, and Driving force is acted on to brake shoe iron.The impetus power of hydraulic pressure is larger, promote effect stability reliable, and raw material can be recycled, and cost is low.Hydraulic pressure cavity can filling liquid, and forms hydraulic drive piston movement, simple in structure, easy to use.Push mechanism comprises push mechanism and lower push mechanism, upper push mechanism and lower push mechanism can be used respectively the two ends of brake shoe iron and the two ends of lower brake shoe iron, and amount of force is identical, upper brake shoe iron and lower brake shoe iron obtain outer tension uniformly, apply frictional force to brake drum by friction plate, brake drum obtains evenly, stable and powerful friction effect, and braking effect is remarkable, braking distance is short.Returnning spring can provide restoring force, when after end of braking, piston is drawn back to initial position, guarantees to brake accurately next time and carries out.The first magnet and the second magnet can accurately be held the position of push mechanism promotion brake shoe iron on the one hand, avoid dislocation; On the other hand, after end of braking, the first magnet and the second magnet can drive brake shoe iron return, and return speed is fast, avoids occurring unwanted braking effect.Axle sleeve is limit structure, can avoid push mechanism generation slippage, guarantees that each push mechanism working position is accurate.Meanwhile, the mode of flexible connection realizes push mechanism can be movable in axle sleeve, and then reach promotion effect.Meanwhile, the utlity model has simple in structure, practical, the feature that input cost is low.
Brief description of the drawings
Below in conjunction with accompanying drawing, the utility model is described in further detail:
Fig. 1 is the structural representation of a kind of hydraulic drum brake of the utility model;
Fig. 2 is the structural representation of hydraulic pushing device in the utility model;
Structural representation when Fig. 3 is the work of liquid pushing device;
Fig. 4 is the structural representation of piston in the utility model;
Fig. 5 is that the A of Fig. 4 is to structural representation;
Fig. 6 is the structural representation of upper push mechanism in the utility model;
Fig. 7 is the structural representation of lower push mechanism in the utility model.
Embodiment
As shown in Figures 1 to 7, a kind of hydraulic drum brake, comprise brake disc 1 and brake shoe iron, brake shoe iron includes brake shoe iron 21 and lower brake shoe iron 22, upper brake shoe iron 21 is located at the left part of brake disc 1, lower brake shoe iron 22 is located at the right part of brake disc 1, and friction plate 3 has all been riveted in the outer end of the outer end of upper brake shoe iron 21 and lower brake shoe iron 22.Upper brake shoe iron 21 can be with movable friction plate 3 to move to brake drum with lower brake shoe iron 22, realizes braking.Between upper brake shoe iron 21 and lower brake shoe iron 22, be provided with hydraulic pushing device 4, the both sides of hydraulic pushing device 4 are provided with screw 52, are connected with bolt 51 on screw 52, and bolt 51 is connected on brake disc 1 simultaneously, realize hydraulic pushing device 4 is fixed on to brake disc 1.
Hydraulic pushing device 4 includes housing 5 and piston 6, and the two ends of housing 5 are provided with opening, and the two ends of housing 5 inside are all connected with 6, two pistons 6 of piston and all can move as transverse reciprocating in housing 5 inside.Meanwhile, piston 6 contacts completely with housing 5, between two pistons 6, forms airtight hydraulic pressure cavity 71, and liquid can enter hydraulic pressure cavity 71 and form hydraulic pressure, and it is reciprocating that hydraulic pressure can promote piston 6.On piston 6, be equipped with limited impression 61, be connected with Returnning spring 7 between limited impression 61, limited impression 61 can limit the position of Returnning spring 7, avoids Returnning spring 7 to break away, and guarantees stable connection.After braking stops, liquid detaches in hydraulic pressure cavity 71, and the Returnning spring 7 of stretching impels piston 6 returns by spring-back force, guarantees to brake accurately next time and carries out.Meanwhile, the inner of opening is provided with cavity 11, and lubrication pockets 12 is installed in cavity 11.Lubrication pockets 12 can provide lubricant oil, contributes to piston 6 to-and-fro motion smooth and easy.
Piston 6 is provided with chute 62 near beginning end, chute 62 is connected with push mechanism 81 and lower push mechanism 82, in upper push mechanism 81 and lower push mechanism 82, be equipped with slide block 813, slide block 813 matches with chute 62, realizes upper push mechanism 81 be slidably connected to piston 6 with lower push mechanism 82 by chute 62 and slide block 813.Upper push mechanism 81 is all circular arc with lower push mechanism 82, therefore, in the time that one end of upper push mechanism 81 and one end of lower push mechanism 82 are mutually close, the other end of the other end of upper push mechanism 81 and lower push mechanism 82 mutually away from.The two ends of upper push mechanism 81 are respectively the first moving part 811 and the first driving member 812, and the two ends of lower push mechanism 82 are respectively the second moving part 821 and the second driving member 822, the first moving parts 811 and the second moving part 821 and are all slidably connected on piston 6.The first driving member 812 and the second driving member 822 are all positioned at outside opening, the first driving member 812 is provided with the first magnet 91, the second driving member 822 is provided with the second magnet 92, the first magnet 91 and can acts on brake shoe iron 21, the second magnet 92 and can act on lower brake shoe iron 22.Because the two ends of hydraulic pushing device 4 have included the first magnet 91 and the second magnet 92, so the first magnet 91 can act on the two ends of brake shoe iron 21, the second magnet 92 can act on the two ends of lower brake shoe iron 22.
The opening of housing 5 is provided with axle sleeve, and axle sleeve is limit structure.Axle sleeve includes between the first axle sleeve 101 and the second axle sleeve 102, the first axle sleeves 101 and the second axle sleeve 102 and is connected with fixed connecting piece 10, and fixed connecting piece 10 is fixed the first axle sleeve 101 and the second axle sleeve 102.In the first axle sleeve 101, be formed with circular arc axis hole, therefore the first axle sleeve 101 and the first moving part 811 match, the first moving part 811 is flexibly connected under the position-limiting action of the first axle sleeve 101, the diameter of the first driving member 812 is greater than the internal diameter of circular arc axis hole, avoids the first driving member 812 to enter the first axle sleeve 101.In the second axle sleeve 102, be formed with circular arc axis hole, therefore the second axle sleeve 102 and the second moving part 821 match, the second moving part 821 is flexibly connected under the position-limiting action of the second axle sleeve 102, the diameter of the second driving member 822 is greater than the internal diameter of circular arc axis hole, avoids the second driving member 822 to enter the second axle sleeve 102.Axle sleeve can be avoided push mechanism generation slippage, guarantees that each push mechanism working position is accurate.Meanwhile, the mode of flexible connection realizes push mechanism can be movable in axle sleeve, and then reach promotion effect.
Its braking principle is: first liquid enters hydraulic pressure cavity 71, and liquid volume increases, and produces hydraulic pressure.Hydraulic pressure is in piston 6, and piston 6 outwards moves.Piston 6 is mobile the first moving part 811 and the second moving part 821 move toward one another of driving outwards, under the effect of axle sleeve, the first driving member 812 and the second driving member 822 are opposing and go, the first magnet 91 promotes upper brake shoe iron 21, the second magnet 92 promotes lower brake shoe iron 22, lower brake shoe iron 22 all obtains outer tension with lower brake shoe iron 22, and be with movable friction plate 3 to move, and frictional force is acted on to brake drum, realize braking.After end of braking, the liquid in hydraulic pressure cavity 71 is drawn out of, and the Returnning spring 7 of stretching draws piston 6 and realizes reset, and the first magnet 91 and the second magnet 92 reset with lower brake shoe iron 22 by the upper brake shoe iron 21 of adsorption force traction simultaneously.Hydraulic pushing device 4, taking hydraulic pressure as power source, moves by hydraulic drive piston 6, and drives push mechanism motion, and Driving force is acted on to brake shoe iron.The impetus power of hydraulic pressure is larger, promote effect stability reliable, and raw material can be recycled, and cost is low.Hydraulic pressure cavity 71 can filling liquid, and forms hydraulic drive piston 6 and move, simple in structure, easy to use.Push mechanism acts on brake shoe iron, and amount of force is identical, brake shoe iron obtains outer tension uniformly, applies frictional force to brake drum by friction plate 3, brake drum obtains evenly, stable and powerful friction effect, and braking effect is remarkable, braking distance is short.The position that the first magnet 91 and the second magnet 92 can accurately be held push mechanism promotion brake shoe iron on the one hand, avoids dislocation; On the other hand, after end of braking, the first magnet 91 and the second magnet 92 can drive brake shoe iron return, and return speed is fast, avoids occurring unwanted braking effect.
These are only specific embodiment of the utility model, but technical characteristics of the present utility model is not limited to this.Anyly for solving essentially identical technical problem, realize essentially identical technique effect taking the utility model as basis, done ground simple change, be equal to and replace or modification etc., be all covered by among protection domain of the present utility model.
Claims (8)
1. a hydraulic drum brake, comprise brake disc and brake shoe iron, described brake shoe iron includes brake shoe iron and lower brake shoe iron, described upper brake shoe iron is located at the left part of described brake disc, described lower brake shoe iron is located at the right part of described brake disc, friction plate has all been riveted in the outer end of described upper brake shoe iron and the outer end of described lower brake shoe iron, it is characterized in that: between described upper brake shoe iron and described lower brake shoe iron, be provided with hydraulic pushing device, described hydraulic pushing device includes housing and piston, the two ends of described enclosure interior are all connected with described piston, between described piston, be formed with hydraulic pressure cavity, between described piston, be connected with Returnning spring, the other end of described piston is all connected with push mechanism, described push mechanism includes push mechanism and lower push mechanism, one end of described upper push mechanism is provided with the first magnet, described the first magnet acts on the two ends of described upper brake shoe iron, one end of described lower push mechanism is provided with the second magnet, described the second magnet acts on the two ends of described lower brake shoe iron, the opening of described housing is fixed with axle sleeve, and described upper push mechanism is all flexibly connected described axle sleeve with described lower push mechanism.
2. a kind of hydraulic drum brake according to claim 1, is characterized in that: on described piston, be equipped with limited impression, be connected with described Returnning spring between described limited impression.
3. a kind of hydraulic drum brake according to claim 1, is characterized in that: the both sides of described housing are provided with screw, on described screw, be connected with bolt, described bolt is fixed described housing.
4. a kind of hydraulic drum brake according to claim 1, it is characterized in that: described push mechanism is curved, described upper push mechanism includes the first moving part and the first driving member, described the first moving part and described axle sleeve match, described the first moving part is flexibly connected described axle sleeve, and described the first driving member is provided with described the first magnet; Described lower push mechanism includes the second moving part and the second driving member, and described the second moving part and described axle sleeve match, and described the second moving part is flexibly connected described axle sleeve, and described the second driving member is provided with described the second magnet.
5. a kind of hydraulic drum brake according to claim 4, is characterized in that: axle sleeve includes the first axle sleeve and the second axle sleeve; Described the first axle sleeve and described the first moving part match, and described the first axle sleeve is flexibly connected described the first moving part, and described the second axle sleeve and described the second moving part match, and described the second axle sleeve is flexibly connected described the second moving part.
6. a kind of hydraulic drum brake according to claim 5, is characterized in that: between described the first axle sleeve and described the second axle sleeve, be connected with fixed connecting piece, fixing described the first axle sleeve of described fixed connecting piece and described the second axle sleeve.
7. a kind of hydraulic drum brake according to claim 1, it is characterized in that: described piston is provided with chute, in described upper push mechanism and described lower push mechanism, be equipped with slide block, described chute and described slide block match, and described slide block is embedded in described chute.
8. a kind of hydraulic drum brake according to claim 1, is characterized in that: the inner of described opening is provided with cavity, in described cavity, lubrication pockets is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420270335.0U CN203879988U (en) | 2014-05-23 | 2014-05-23 | Hydraulic drum brake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420270335.0U CN203879988U (en) | 2014-05-23 | 2014-05-23 | Hydraulic drum brake |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203879988U true CN203879988U (en) | 2014-10-15 |
Family
ID=51680487
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420270335.0U Expired - Fee Related CN203879988U (en) | 2014-05-23 | 2014-05-23 | Hydraulic drum brake |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203879988U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111577790A (en) * | 2020-04-10 | 2020-08-25 | 周长虹 | Two-way leading hoof type brake mechanism based on drum is stopped |
-
2014
- 2014-05-23 CN CN201420270335.0U patent/CN203879988U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111577790A (en) * | 2020-04-10 | 2020-08-25 | 周长虹 | Two-way leading hoof type brake mechanism based on drum is stopped |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20151029 Address after: 10 No. 36, No. three, No. 324002, Donggang Road, Zhejiang, Quzhou, No. 1 Patentee after: ZHEJIANG JINGKE AUTO PARTS CO.,LTD. Address before: 324002 No. three, 36 Donggang Road, Quzhou Economic Development Zone, Zhejiang, China Patentee before: ZHEJIANG TONGSHUN MOTOR VEHICLE PARTS Co.,Ltd. |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20190724 Address after: 233400 Century Avenue, Huaiyuan County, Bengbu City, Anhui Province Patentee after: Anhui Op Automotive Braking System Co.,Ltd. Address before: 10 No. 36, No. three, No. 324002, Donggang Road, Zhejiang, Quzhou, No. 1 Patentee before: ZHEJIANG JINGKE AUTO PARTS CO.,LTD. |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141015 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |