CN103742563B - A kind of drum brake - Google Patents
A kind of drum brake Download PDFInfo
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- CN103742563B CN103742563B CN201310752583.9A CN201310752583A CN103742563B CN 103742563 B CN103742563 B CN 103742563B CN 201310752583 A CN201310752583 A CN 201310752583A CN 103742563 B CN103742563 B CN 103742563B
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- brake
- transition cover
- flat piece
- cover plate
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Abstract
The present invention discloses a kind of drum brake, comprising: brake drum, brake shoe block and brake camshaft, described brake camshaft is by tail end, bar portion and head end are sequentially connected one-body molded, it is characterized in that: the head end of described brake camshaft comprises: a rear end is connected with front end, described bar portion and the transition cover plate in U-shape in flat piece of flat-shaped rectangular parallelepiped and two pieces, the one end of the side plate that described transition cover plate is perpendicular to described base plate respectively by base plate two ends with two is connected with one-body molded, two pieces of described transition cover plates are fastened in described flat piece of two big planes by groove respectively, and the groove of two pieces of described transition cover plates is also for holding compensate gasket to adjust two pieces of described transition cover plates and described flat piece of two big planes buckle the integral thickness after closing and catercorner length. the present invention by compensate gasket increase flat piece superpose with transition cover plate after thickness and catercorner length, can effective compensation friction facing and brake drum wear and tear after the braking gap that produces.
Description
Technical field
The present invention relates to brake field, in particular to a kind of drum brake.
Background technology
Vehicle is Modern Traffic most convenient, applies maximum transportation means, and stopper is safety member the most important on vehicle, and the braking ability of vehicle directly affects the driving safety of vehicle. Drum brake low cost and meet traditional design, it is widely used, it comprises brake drum, brake shoe block, supporting pin, return spring and actuator etc., it realizes brake by outside brake shoe block friction brake drum, there is following shortcoming in conventional drum brake: the wear limit scope of the friction facing on (1) brake shoe block is little, after friction facing may wear to the limit, need to change in time, otherwise have potential safety hazard, therefore the replacing of friction facing is relatively more frequent, changes trouble and cost height; (2) after brake drum weares and teares, gap between itself and friction facing cannot compensate, braking gap is caused to continue to increase, even if the friction facing more renewed or brake shoe block, its life-span also can be shorter and shorter, under equal conditions, the brake drum worn and torn causes friction facing to be changed frequently, and the braking gap increased still is difficult to compensate, it is easy to cause brake insensitive, when causing needing snub, there is potential safety hazard; (3) brake camshaft rotation angle is restricted, only rotates within the scope of the angle of regulation, could produce effective braking bias amount, and for the friction facing and the brake drum that there is abrasion, it cannot increase friction facing outwardly distance further.
For above-mentioned technological deficiency, still it is necessary to invent a kind of drum brake that the damage of rubbing of friction facing and brake drum can be carried out effective compensation.
Summary of the invention
Friction facing cannot be carried out the defect of wear-compensating by the present invention in order to overcome existing drum brake, has invented a kind of drum brake, has structure simple, and can carry out the advantages such as effective compensation for the different abrasion losies of mill friction facing.
For solving the problems of the technologies described above, the present invention adopts following technical scheme:
A kind of drum brake, comprising: brake drum, brake shoe block and brake camshaft, described brake camshaft is by tail end, bar portion and head end are sequentially connected one-body molded, wherein: the head end of described brake camshaft comprises: a rear end is connected with front end, described bar portion and the transition cover plate in U-shape in flat piece of flat-shaped rectangular parallelepiped and two pieces, the one end of the side plate that described transition cover plate is perpendicular to described base plate respectively by base plate two ends with two is connected with one-body molded, two pieces of described transition cover plates are fastened in described flat piece of two big planes by groove respectively, and the groove of two pieces of described transition cover plates is also for holding compensate gasket to adjust two pieces of described transition cover plates and described flat piece of two big planes buckle the integral thickness after closing and catercorner length.
Preferably, the nook, outside that the described base plate of described transition cover plate is connected with described biside plate is respectively arranged with knuckle.
Preferably, being provided with a baffle plate between described flat piece of rear end and front end, bar portion carries out spacing for the position being installed on described brake shoe block to described head end.
Preferably, described baffle plate is flat-shaped rectangular-shaped, two narrow side is circular arc face, and outward extending direction, two narrow sides is identical with the direction at two of described flat piece big plane places respectively, and two narrow side wherein one to brake time outside described brake shoe block deviation diagonal angle be provided with transition inclined-plane with avoid to brake drum produce interfere.
Preferably: described compensate gasket is in corresponding with described flat piece of big planeform flat-shaped rectangular-shaped, and it is provided with the specification of different thickness.
Preferably, the thickness specification of described compensate gasket comprises: 0.5mm, 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm and 4mm.
Preferably, the base plate of described transition cover plate is provided with heavy head through hole, accordingly, it is provided with through hole between two big planes of described flat piece, when two pieces of described transition cover plates are fastened on described flat piece by groove, wherein the heavy head through hole internal fixtion of one piece of described transition cover plate is provided with a heavy head nut, and a heavy screw is connected two pieces of described transition cover plates to be fixed in two big planes of described flat piece with described heavy head nut after the through hole on the heavy head through hole of transition cover plate described in another block and described flat piece; Accordingly, described compensate gasket is provided with through hole with in the groove that can be installed on described transition cover plate.
Preferably, the heavy head through hole of described transition cover plate is the heavy head through hole of taper.
Preferably, the thickness of one end that described brake shoe block coordinates with described brake camshaft head end is thinner than the thickness of traditional brake shoe block, and its Reducing thickness is identical with the base plate thickness of described transition cover plate.
The present invention compared with prior art, has following useful effect:
1, a kind of drum brake of the present invention, flat piece of its brake camshaft head end by transition cover plate can add flexibly compensate gasket with increase flat piece superpose with transition cover plate after thickness and catercorner length, when brake shoe block is opened in brake camshaft rotation support, it can increase outer distance of friction facing, the braking gap that the abrasion of effective compensation friction facing and brake drum causes, increase the wear limit of friction facing, the whole service life of brake shoe block and friction facing can be extended, reduce and change number of times, reduce costs.
2, a further advantage of the invention is the compensate gasket being provided with different thickness specification and carry out corresponding braking gap compensation with the different wear stages for friction shim and brake drum.
3, a further advantage of the invention is and position when being provided with a baffle plate to be coordinated with brake shoe block by the head end of brake camshaft between brake camshaft head end with bar portion.
4, the present invention further advantage be that the pair of horns of two narrow sides of baffle plate is provided with transition inclined-plane, with avoid grade plate when brake camshaft turns over certain angle and brake drum produce interfere.
5, the present invention is installed on transition cover plate and compensate gasket on flat piece by heavy head screw and heavy head nut, and for convenience detach and replacing, suitability is strong.
Accompanying drawing explanation
Accompanying drawing 1 is the structural representation of a kind of drum brake of the present invention when not braking;
Accompanying drawing 2 is structural representation when the present invention brakes;
Accompanying drawing 3 is the transition cover plate structure schematic diagram of the present invention;
Accompanying drawing 4 is the perspective exploded view of the present invention;
Accompanying drawing 5 is the perspective view of brake camshaft of the present invention;
Wherein:
1, brake camshaft;
11, tail end;
12, bar portion;
13, head end; 131, baffle plate; 132, heavy head screw; 133, transition cover plate; 134, flat piece; 135, compensate gasket; 136, heavy head nut;
2, brake shoe block;
21, shoes;
22, friction facing.
Embodiment
Referring to accompanying drawing and further describe the present invention in conjunction with embodiment, to make those skilled in the art can implement according to this with reference to specification sheets word, it should be understood that protection scope of the present invention is by the restriction of embodiment. It will be appreciated that, in the following enforcement mode of the present invention mentioned " on ", D score, "left", "right" is all taking the direction shown in each figure as benchmark, these words being used for limiting direction are only used to be convenient to illustrate, do not represent the restriction to the concrete technical scheme of the present invention.
Embodiment
As shown in Figure 1 or 2, a kind of drum brake, comprising: brake camshaft 1, brake shoe block 2 and brake drum (figure does not look), as shown in Figure 4 and Figure 5, brake camshaft 1 comprises: tail end 11, bar portion 12 and head end 13, tail end 11, bar portion 12 and head end 13 are connected one-body molded before and after sequentially, tail end 13 is provided with spline to be connected with the brake adjustment arm on vehicle, the angle that brake adjustment arm rotates according to the dynamics control brake camshaft 1 of brake, brake camshaft 1 is located between one end of shoes 21 of two pieces of brake shoe blocks 2 by its head end 3, after brake camshaft 1 turns over an angle, its head end outwards supports the shoes 21 of two pieces of brake shoe blocks 2 and opens, so that the friction facing 22 of brake shoe block can act on brake drum.
As shown in Figure 4 and Figure 5, the head end 13 of brake camshaft 1 comprises: baffle plate 131, heavy head screw 132, transition cover plate 133, flat piece 134, compensate gasket 135 and heavy head nut 136, wherein:
The rear plate face of baffle plate 131 is connected with the front end face in bar portion 12, when being installed on brake shoe block 2 for brake camshaft 1, head end 13 is positioned, baffle plate 131 is in flat-shaped cylinder, two narrow side is circular arc face, its two narrow side wherein one be respectively arranged with transition inclined-plane to remove this diagonal angle to deviating from the diagonal angle outside brake shoe block 2 when braking, avoid producing to interfere to brake drum.
Flat piece 134 in flat-shaped rectangular-shaped, its rear end is fixedly connected with the front face of baffle plate 131, and its medullary ray is corresponding with the axis in bar portion 12 and tail end 11, and the mid-way of its two big plane is provided with through hole, the outward extending direction, two narrow sides of baffle plate 131 is identical with the direction at two of flat piece 134 big plane places respectively.
As shown in Figure 3, transition cover plate 133 is in U-shape, one end of its side plate being perpendicular to base plate respectively with two by base plate two ends is connected one-body molded, and the nook, outside that base plate is connected with biside plate is respectively arranged with knuckle, and the centre of its base plate is provided with the heavy head through hole of taper. transition cover plate 133 is two pieces and is fastened in two big planes of flat piece 134 by groove respectively, and the through hole internal fixtion of wherein one piece of transition cover plate 133 is provided with a heavy head nut 136, heavy head nut 136 extends in the groove of transition cover plate 133, it is by the through hole being fixedly welded on this block transition cover plate 133, integrally can also process with this block transition cover plate 133, when two pieces of transition cover plates 133 are fastened in the big plane in both sides of flat piece 134 respectively, an one heavy screw 132 is connected with heavy head nut 136 after the through hole of another block transition cover plate 133 and flat piece 134, so that two pieces of transition cover plates 133 are fixed on flat piece 134.
Compensate gasket 135 is in corresponding with the big plane of flat piece 134 flat-shaped rectangular-shaped, and the two of compensate gasket 135 mid-way of big plane be provided with through hole with corresponding with the through hole on the heavy head through hole of the taper of transition cover 133 and flat piece 134, it is provided with different thickness specification, and the thickness specification of the preferred compensate gasket 135 of the present invention comprises: 0.5mm, 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm and 4mm. When friction facing 22 or brake drum are carried out wear-compensating by needs, compensate gasket 135 is arranged in the groove of transition cover plate 133, and its through hole is corresponding with the heavy head through hole of the taper of transition cover plate 133, and it is fixedly installed in the big plane of flat piece 134 to increase the thickness after superposing for flat piece 134 and catercorner length with transition cover plate 133 by heavy head screw 132 and heavy head nut 136 together with transition cover plate 133.
The brake drum of the present invention is consistent with traditional brake drum, and the structure of brake shoe block 2 is consistent with traditional brake shoe agllutination structure, it is made up of shoes 21 and the friction facing 22 that is installed on shoes 21 convex globoidal, wherein the end face of one end that shoes 21 coordinates with the head end of brake camshaft 1 is plane, and the thickness of this end is thinner than the thickness of traditional brake shoe block 2, its Reducing thickness is identical with the base plate thickness of transition cover plate 133, shoes 21 can be produced again, continue after old shoes can also be transformed to use, to increase suitability and the economy of the present invention.
When not needing to carry out braking gap compensation, the present invention does not need to install compensate gasket 135, directly transition cover plate 133 is installed on flat piece 134 and just can normally use. when braking gap is compensated by needs, as shown in Figure 1, after the transition cover plate 133 of the head end 13 of brake camshaft 1 and compensate gasket 135 are arranged on flat piece 134 by heavy head screw 132, its head end 13 is installed between one end of the shoes 21 of two brake shoe blocks 2, and positioned by baffle plate 131, ensure the length that head end 13 is inserted between two shoes 21, when not braking, the base plate of the transition cover plate 133 of head end 13 upper and lower sides is corresponding with the end face of the shoes 21 of upper and lower sides respectively, when braking, brake adjustment arm driving brake camshaft 1 clockwise direction rotates, now the upper right of baffle plate 131 and the diagonal angle of lower left deviate respectively to the both sides of brake shoe block 2, for avoiding producing to interfere with brake drum (figure does not look), the transition inclined-plane, top of baffle plate 131 is positioned at right side accordingly, transition inclined-plane, lower section is positioned at left side, as shown in Figure 2, after brake camshaft 1 rotates clockwise an angle, the transition inclined-plane of baffle plate 131 upper and lower sides deviates from brake shoe block 2 respectively to the right and to the left, owing to being removed the diagonal angle of baffle plate 131 by transition inclined-plane, when brake camshaft 1 can be avoided to rotate, this stretched out in after diagonal angle was put an angle thereupon and produces to interfere with the position such as brake drum outside brake shoe block 2, conveniently install and use. and during brake, the head end 13 of brake camshaft 1 supports, by the transition cover plate 133 of upper and lower both sides, the shoes 21 opening both up and down respectively makes outer of friction facing 22 to act on the object that brake drum reaches brake, transition cover plate 133 can be made to support the process opening shoes 21 by the knuckle of transition cover plate 133 steadily laborsaving.
When brake drum or be installed on brake shoe block 2 friction facing 22 occur abrasion or reach wear limit, the compensate gasket 135 of suitable thickness can be added in the groove of the transition cover plate 133 of the head end 13 of brake camshaft 1, to increase transition cover plate 133 and flat piece 134 superposition thickness and catercorner length, therefore, as shown in Figure 2, when brake makes brake camshaft 1 turn over identical angle, the distance that friction facing 22 is outer is bigger than when not adding compensate gasket 135, thus the braking gap that effective compensation friction facing 22 or brake drum cause because wearing and tearing, after making friction facing 22 or its abrasion of brake drum, friction facing 22 still can act on brake drum effectively to brake at identical conditions. and friction facing 22 internal layer that skin cannot work after being worn again originally, owing to friction facing 22 can further outer, then its internal layer can continue to act on brake drum, which substantially increases the wear limit of friction facing 22, extends its work-ing life. the transition cover plate 133 of upper and lower sides can arrange the compensate gasket 135 of identical or different thickness specification respectively to adapt to the different degrees of wear of brake drum or friction facing 22, and suitability is strong.
Specific embodiments of the invention it are only disclosed in above; but; the present invention is not limited thereto; the changes that any person skilled in the art can think of; as by riveted joint compensate gasket, compensate gasket of splicing, or protection scope of the present invention all should be fallen into by directly the compensate gasket of different thickness being fixedly welded on head end etc. at different camshafts.
Claims (8)
1. a drum brake, comprising: brake drum, brake shoe block and brake camshaft, described brake camshaft is by tail end, bar portion and head end are sequentially connected one-body molded, it is characterized in that: the head end of described brake camshaft comprises: a rear end is connected with front end, described bar portion and the transition cover plate in U-shape in flat piece of flat-shaped rectangular parallelepiped and two pieces, the one end of the side plate that described transition cover plate is perpendicular to described base plate respectively by base plate two ends with two is connected one-body molded, two pieces of described transition cover plates are fastened in described flat piece of two big planes by groove respectively, and the groove of two pieces of described transition cover plates is also for holding compensate gasket to adjust two pieces of described transition cover plates and described flat piece of two big planes buckle the integral thickness after closing and catercorner length.
2. drum brake according to claim 1, it is characterised in that: the nook, outside that the described base plate of described transition cover plate is connected with described biside plate is respectively arranged with knuckle.
3. drum brake according to claim 1, it is characterised in that: it is provided with a baffle plate between described flat piece of rear end and front end, bar portion and carries out spacing for the position that described head end is installed on described brake shoe block.
4. drum brake according to claim 3, it is characterized in that: described baffle plate is flat-shaped rectangular-shaped, two narrow side is circular arc face, and outward extending direction, two narrow sides is identical with the direction at two of described flat piece big plane places respectively, and two narrow side wherein one to brake time outside described brake shoe block deviation diagonal angle be provided with transition inclined-plane with avoid to brake drum produce interfere.
5. drum brake according to claim 1, it is characterised in that: described compensate gasket is in corresponding with described flat piece of big planeform flat-shaped rectangular-shaped, and it is provided with the specification of different thickness.
6. drum brake according to claim 5, it is characterised in that: the thickness specification of described compensate gasket comprises: 0.5mm, 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm and 4mm.
7. drum brake according to claim 1 or 4, it is characterized in that: the base plate of described transition cover plate is provided with heavy head through hole, accordingly, it is provided with through hole between two big planes of described flat piece, when two pieces of described transition cover plates are fastened on described flat piece by groove, wherein the heavy head through hole internal fixtion of one piece of described transition cover plate is provided with a heavy head nut, an one heavy screw is connected two pieces of described transition cover plates to be fixed in two big planes of described flat piece with described heavy head nut after the through hole on the heavy head through hole of transition cover plate described in another block and described flat piece, accordingly, described compensate gasket is provided with through hole with in the groove that can be installed on described transition cover plate.
8. drum brake according to claim 7, it is characterised in that: the heavy head through hole of described transition cover plate is the heavy head through hole of taper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310752583.9A CN103742563B (en) | 2013-12-31 | 2013-12-31 | A kind of drum brake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310752583.9A CN103742563B (en) | 2013-12-31 | 2013-12-31 | A kind of drum brake |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103742563A CN103742563A (en) | 2014-04-23 |
| CN103742563B true CN103742563B (en) | 2016-06-01 |
Family
ID=50499614
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310752583.9A Active CN103742563B (en) | 2013-12-31 | 2013-12-31 | A kind of drum brake |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103742563B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105508476B (en) * | 2016-02-01 | 2017-11-07 | 张斌 | A kind of convenient adjustment and the drum brake of compensation braking gap |
| CN110541896A (en) * | 2019-09-16 | 2019-12-06 | 泰州市友民交通器材有限公司 | Dynamic braking balance hub brake for vehicle |
| CN112572679B (en) * | 2020-12-16 | 2022-05-10 | 摩拜(北京)信息技术有限公司 | Brake device and shared vehicle |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2203726Y (en) * | 1994-08-24 | 1995-07-19 | 于学善 | Floating adjustable braker |
| CN203655970U (en) * | 2013-12-31 | 2014-06-18 | 张斌 | Drum type brake |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6267335A (en) * | 1985-09-14 | 1987-03-27 | Yamada Seisakusho:Kk | Automatic adjusting device for drum brake |
| RU2364767C2 (en) * | 2003-10-16 | 2009-08-20 | Федерал-Могал Корпорейшн | Friction brake shoe lining block (versions) and method of damping lengthwise vibrations |
-
2013
- 2013-12-31 CN CN201310752583.9A patent/CN103742563B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2203726Y (en) * | 1994-08-24 | 1995-07-19 | 于学善 | Floating adjustable braker |
| CN203655970U (en) * | 2013-12-31 | 2014-06-18 | 张斌 | Drum type brake |
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| Publication number | Publication date |
|---|---|
| CN103742563A (en) | 2014-04-23 |
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