CN201173260Y - Double-shoe drum-braking device - Google Patents
Double-shoe drum-braking device Download PDFInfo
- Publication number
- CN201173260Y CN201173260Y CNU2008200036075U CN200820003607U CN201173260Y CN 201173260 Y CN201173260 Y CN 201173260Y CN U2008200036075 U CNU2008200036075 U CN U2008200036075U CN 200820003607 U CN200820003607 U CN 200820003607U CN 201173260 Y CN201173260 Y CN 201173260Y
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- Prior art keywords
- shoe plate
- face
- camshaft
- brake
- shoe
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Abstract
The utility model relates to double-shoe plate type drum brake mechanism, which is characterized in that a brake disc, a first cam shaft, a second cam shaft, a first shoe plate, a second shoe plate, a tension component and a connecting rod component are included, wherein, the first cam shaft and the second cam shaft respectively drive the corresponding brake shoe plates, and simultaneously two cam shafts are connected and driven by the connecting rod component to ensure that the two cam shafts rotate at the identical direction during the braking action; the double-shoe plate type drum brake mechanism solves the problem that the brake power of the dragging brake shoe plate reversely expanded in the direction opposite to the vehicle rotation in the prior utilization is poor, thus the expanding directions of the two brake shoe plates are caused to be identical with the vehicle rotating directions, therefore the braking mechanism of the double front pulling brake shoe plates is formed, and the braking effect of the vehicle brake is enhanced.
Description
Technical field
The utility model relates to a kind of brake mechanism, refers to a kind of drum evil spirit mechanism that is applicable to motor vehicle, has two shoe plates especially.
Background technique
In locomotive system, engine is the parts that produce power, and brake mechanism then is the device that control power produces.Because locomotive is light far beyond automobile brake strength, so the general mechanical drum type brake of using more.
With reference to figure 1, it illustrates very mechanism's exploded view of known drum.Known drum very mechanism is sheathed two symmetrical Brake shoes 2,3 in brake disc (or title brake base plate) 1, and each Brake shoe all has a planar ends 4 and a circular rabbet 5.The cam part 7 of brake camshaft 6 includes two abutment plane 8 that are positioned at opposite side, the two side faces 9 (the two all only illustrates one of them in the drawings) that reaches linking two abutment plane 8.
The planar ends 4 of two Brake shoes 2,3 is connected to two abutment plane 8 of brake camshaft 6 respectively because of the application of force that hang on draught spring 10 therebetween, that is under no brake state, two Brake shoes 2,3 are subjected to the pulling force of draught spring 10 and press brake camshaft 6 simultaneously.Circular rabbet 5 is the locating studs 12 that are socketed on pivotly on the brake disc 1.
With reference to figure 2 and Fig. 3, it illustrates the floor map of known brake mechanism under state of not braking and brake state respectively, wherein for asking drawing succinct, draught spring is omitted.Relatively two figure can find out obviously that wherein the dimension of a Brake shoe 2 can be same as car veer A shown in arrow P 1, but the dimension of another Brake shoe 3 then can be opposite, shown in arrow P 2.The Brake shoe of expanding in the same way with car veer A 2 has stronger stopping power comparatively speaking, draws Brake shoe (leading shoe) before being called; Another drags Brake shoe (trailing shoe) after oppositely 3 of the Brake shoes of expansion are called, and stopping power is relatively poor.
The art personage is in common knowledge for this reason for the relatively poor disappearance of above-mentioned another Brake shoe braking force, also has different settling modes to be suggested.This case inventor is devoted to this field correlative study all the year round, and is same in the improvement of seeking the drum type brake mechanism energetically, and continuous research of warp and test are obtained a kind of two shoe plate formulas that promote stopping power eventually and roused evil spirit mechanism.
The model utility content
The purpose of this utility model is to provide very mechanism of a kind of pair of shoe plate formula drum, the dimension that makes two shoe plates all with the car veer in the same way, common constitute draw Brake shoe before two, improve the brake braking effect.
The utility model adopts following technical characteristics, has thought the solution above-mentioned purpose.
Of the present utility model pair of shoe plate formula drum evil spirit mechanism comprises a brake disc, one first camshaft, one second camshaft, one first shoe plate, one second shoe plate, a tension member, reaches an interlock rod member.
Above-mentioned first camshaft includes one first and places end and one first cam end, second camshaft includes one second and places end and one second cam end, and first camshaft and second camshaft each place with first and hold and second place end and be arranged in brake disc rotationally.First cam end includes one first pivot joint face and one first drive surface, and second cam end includes one second pivot joint face and one second drive surface.
Above-mentioned first shoe plate includes one first shoe plate and articulates end face and one first driven end face.First shoe plate articulates end face and is articulated in the second pivot joint face, and the first driven end face then contacts and is resisted against first drive surface.Second shoe plate includes one second shoe plate and articulates end face and one second driven end face, and second shoe plate articulates end face and is articulated in the first pivot joint face, and the second driven end face then contacts and is resisted against second drive surface.
Tension member is connected between first shoe plate and second shoe plate, to provide a pretension in first shoe plate and second shoe plate.The interlock rod member is movably to be connected between first camshaft and second camshaft, in order to transmit brake driving force to the second camshaft from first camshaft, second camshaft and first camshaft is rotated in the same way.
By said mechanism, when second camshaft and first camshaft rotate in the same way, respectively with first shoe plate and the outside pushing tow of second shoe plate to contacting the brake hub, reach the effect of drawing brake shoe before two Brake shoes are all, therefore can promote brake braking strength.
The above-mentioned first pivot joint face can be the bulge loop face with the second pivot joint face, and first shoe plate articulates end face and second shoe plate pivot joint end face then can be the scrobicular ring face.First drive surface and second drive surface one at least can be a plane; The first driven end face and the second driven end face one at least also can be the plane.
Eccentric first camshaft and second camshaft of being articulated in of above-mentioned interlock rod member.The axial vane surface of first camshaft and second camshaft can extend a L type extending body respectively, and the interlock rod member can be a C type bar, and the turnover pin of two L type extending bodys extends in opposite directions.C type bar two ends are articulated in two turnover pin respectively, with transmission second camshaft and first camshaft in the same way.
Above-mentioned tension member comprises two springs, and connects to collude and be butted on first shoe plate and second shoe plate.
Advantage of the present utility model is, the dimension of two shoe plates all with the car veer in the same way, common constitute draw Brake shoe before two, improved the brake braking effect.
Description of drawings
Fig. 1 is very mechanism's exploded view of known drum;
The floor map that Fig. 2 is known brake mechanism under brake state not;
Fig. 3 is the floor map of known brake mechanism under the brake state;
Fig. 4 is the drum evil spirit mechanism stereogram of the utility model one preferred embodiment;
Fig. 5 is the exploded view of Fig. 4;
Fig. 6 is the partial enlarged drawing of the camshaft of Fig. 5;
Fig. 7 is the drum floor map of mechanism under brake state not very of the utility model one preferred embodiment;
Fig. 8 is the floor map of drum evil spirit mechanism under the brake state of the utility model one preferred embodiment.
Symbol description
Brake disc 1 Brake shoe 2,3
Planar ends 4 circular rabbets 5
Brake camshaft 6 cam part 7
Abutment plane 8 sides 9
Draught spring 10 brake arms 11
Locating stud 12
Brake disc 21 first camshafts 22
First places end 221 first cam end 222
The first pivot joint face, 223 first drive surface 224
Second cam end, 232 second pivot joint faces 233
Second drive surface, 234 first shoe plates 24
First shoe plate articulates end face 241 first driven end faces 242
Second shoe plate, 25 second shoe plates articulate end face 251
The second driven end face 252 interlock rod members 26
L type extending body 27,28 turnover pin 271,281
Brake hub inwall 331 latches 34
Embodiment
With reference to figure 4 and Fig. 5, it illustrates the drum evil spirit's mechanism's stereogram and the exploded view of the utility model one preferred embodiment respectively.In the present embodiment two shoe plate formulas are roused evil spirit mechanism and be applied to a locomotive, drum very mechanism comprises a brake disc 21, one first camshaft 22, one second camshaft 23, one first shoe plate 24, one second shoe plate 25, a tension member 30 and an interlock rod member 26.
With reference to figure 5 and Fig. 6, the two ends of above-mentioned two camshafts 22,23 form respectively and place end 221,231 and cam end 222,232 in the lump.First of first camshaft 22 places second of end 221 and second camshaft 23 and places and hold 231 to be placed through brake disc 21 all rotationally, and including second cam end 232 of one first pivot joint face 223 and one first drive surface, 224, the second camshafts 23, first cam end 222 of first camshaft 22 includes one second pivot joint face 233 and one second drive surface 234.Above-mentioned two pivot joint faces 223,233 are all the bulge loop face, and two drive surface 224,234 are all the plane.One brake arm 31 is fixed in first and places end 221, the second and place end 231 ends then to resist bolt 32 with one fastening, makes second camshaft, 23 location and brake disc 21 is rotatable relatively.
Refer again to Fig. 4 and Fig. 5.The rough camber of above-mentioned two Brake shoe external forms, and tension member 30 (present embodiment is two springs) two ends hang on two Brake shoes respectively, provide a pretension to two Brake shoes by this.First shoe plate 24 includes one first shoe plate pivot joint end face 241 and one first driven end face 242, the second shoe plates 25 include one second shoe plate pivot joint end face 251 and one second driven end face 252.
First shoe plate pivot joint end face 241 is articulated in the second pivot joint face, 233, the second shoe plates pivot joint end face 251 and is articulated in the first pivot joint face 223.Specifically, above-mentioned two articulate end faces 241,251 is all the scrobicular ring face, corresponds respectively to the bulge loop face kenel of the second pivot joint face 233 and the first pivot joint face 223, so that each pivot joint face and corresponding pivot joint end face for being coupled with being pivoted relative to each other.
The first driven end face 242 is that contact is resisted against 252 contacts of first drive surface, 224, the second driven end faces and is resisted against second drive surface 234, and two driven end faces 242,252 are all the plane.
Below will describe the brake running of the utility model mechanism in detail.At first with reference to figure 5 and Fig. 7, Fig. 7 is the drum of the preferred embodiment floor map of mechanism under brake state not very.When not running of brake, that is brake arm 31 nothings are done the time spent, because the pulling force of two tension members 30, make the first driven end face 242 of the shoe plate 24 of winning tightly be resisted against first drive surface 224 of first cam end 222, the second driven end face 252 of second shoe plate 25 tightly is resisted against second drive surface 234 of second cam end 232.
Then with reference to figure 5 and Fig. 8, Fig. 8 is the floor map of drum evil spirit mechanism under the brake state of preferred embodiment.When brake arm 31 rotates because of rotation drives first camshaft 22, the first pivot joint face 223 of first cam end 222 because of with second shoe plate pivot joint end face 251 of second shoe plate 25 for relatively rotating, so direct interlock second shoe plate 25 not.But first cam end 222 can change contact position with first shoe plate 24 because of rotation.In this example first drive surface 224 and the first driven end face 242 both be all under the extreme situation on plane, when first camshaft 22 rotates, first cam end 222 can with the boundary section of its plane and anchor ring with first shoe plate 24 eject to inwall 331 rubbing contact of the hub 33 of braking, direction shown in arrow P 3 with car veer A in the same way.
Simultaneously, it is C type bar that the rotation of first camshaft 22 can see through L type extending body 27 drive interlock rod members 26, C type bar also so that drive L type extending body 28, second camshaft 23 rotates, and the sense of rotation of second camshaft 23 is identical with the sense of rotation of first camshaft 22.
When second camshaft 23 is turned movingly, identical with the start principle of first camshaft 22, second camshaft 23 is the not interlock that is pivoted relative to each other for first shoe plate 24,234 changes of second drive surface of second cam end 232 and the contact position of second shoe plate 25.Second cam end 232 equally can with the boundary section of its plane and anchor ring with second shoe plate 25 eject to inwall 331 rubbing contact of the hub 33 of braking, direction shown in arrow P 4 with car veer A in the same way.
From the above, rotation by interlock rod member 26 transmission first camshaft 22, make second camshaft 23 identical sense of rotation to be arranged with first camshaft 22, and then reach make first shoe plate 24 and second shoe plate 25 dimension all with car veer A in the same way, draw Brake shoe before common formation is two, brought into play bigger braking effect.
The benefit that above-mentioned two drive surface 224,234 and corresponding two driven end faces 242,252 are designed to the plane be can cause compress really, firm, and make go up more or less freely.Certainly, to desire to reach the purpose of pushing tow, it is also feasible to manufacture other appearance structure, is not limited to the described person of embodiment.
Claims (7)
1. two shoe plate formulas are roused very mechanism, it is characterized in that comprising:
One brake disc;
One first camshaft in order to accept a brake driving force, includes one first and places end and one first cam end, and this first places end and be placed through this brake disc rotationally, and this first cam end includes one first pivot joint face and one first drive surface;
One second camshaft includes one second and places end and one second cam end, and this second places end and be placed through this brake disc rotationally, and this second cam end includes one second pivot joint face and one second drive surface;
One first shoe plate includes one first shoe plate and articulates end face and one first driven end face, and this first shoe plate articulates end face and is articulated in this second pivot joint face, and this first driven end face then contacts and is resisted against this first drive surface;
One second shoe plate includes one second shoe plate and articulates end face and one second driven end face, and this second shoe plate articulates end face and is articulated in this first pivot joint face, and this second driven end face then contacts and is resisted against this second drive surface;
One tension member is connected between this first shoe plate and this second shoe plate, to provide a pretension in this first shoe plate and this second shoe plate; And
One interlock rod member movably is connected between this first camshaft and this second camshaft, in order to transmit this brake driving force from this first camshaft to this second camshaft, this second camshaft and this first camshaft is rotated in the same way.
2. according to claim 1 pair of shoe plate formula drum evil spirit mechanism is characterized in that this first pivot joint face and this second pivot joint face are the bulge loop face, and this first shoe plate articulates end face and this second shoe plate pivot joint end face then is the scrobicular ring face.
3. according to claim 1 pair of shoe plate formula drum evil spirit mechanism is characterized in that this first drive surface and this second drive surface are all the plane.
4. according to claim 1 pair of shoe plate formula drum evil spirit mechanism is characterized in that this first driven end face and this second driven end face are all the plane.
5. according to claim 1 pair of shoe plate formula drum evil spirit mechanism is characterized in that this interlock rod member off-centre is articulated in this first camshaft and this second camshaft.
6. according to claim 5 pair of shoe plate formula drum evil spirit mechanism, the axial vane surface that it is characterized in that this first camshaft and this second camshaft has extended a L type extending body respectively, and this interlock rod member is a C type bar, the turnover pin of this two L type extending body extends in opposite directions, these C type bar two ends are articulated in this two turnovers pin respectively, with this second camshaft of transmission and this first camshaft in the same way.
7. according to claim 1 pair of shoe plate formula drum is mechanism very, it is characterized in that this tension member comprises two springs, and connects to collude and be butted on this first shoe plate and this second shoe plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200036075U CN201173260Y (en) | 2008-01-18 | 2008-01-18 | Double-shoe drum-braking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200036075U CN201173260Y (en) | 2008-01-18 | 2008-01-18 | Double-shoe drum-braking device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201173260Y true CN201173260Y (en) | 2008-12-31 |
Family
ID=40200379
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200036075U Expired - Fee Related CN201173260Y (en) | 2008-01-18 | 2008-01-18 | Double-shoe drum-braking device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201173260Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102242782A (en) * | 2010-05-12 | 2011-11-16 | 英国美瑞特重型车制动系统有限公司 | Brake |
| CN105114490A (en) * | 2015-09-11 | 2015-12-02 | 安徽江淮汽车股份有限公司 | Bottom plate and drum brake |
-
2008
- 2008-01-18 CN CNU2008200036075U patent/CN201173260Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102242782A (en) * | 2010-05-12 | 2011-11-16 | 英国美瑞特重型车制动系统有限公司 | Brake |
| CN102242782B (en) * | 2010-05-12 | 2016-09-21 | 英国美瑞特重型车制动系统有限公司 | A kind of brake |
| CN105114490A (en) * | 2015-09-11 | 2015-12-02 | 安徽江淮汽车股份有限公司 | Bottom plate and drum brake |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081231 Termination date: 20130118 |