CN102213283A - Brake drum cover structure of drum type brake - Google Patents
Brake drum cover structure of drum type brake Download PDFInfo
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- CN102213283A CN102213283A CN2011100647751A CN201110064775A CN102213283A CN 102213283 A CN102213283 A CN 102213283A CN 2011100647751 A CN2011100647751 A CN 2011100647751A CN 201110064775 A CN201110064775 A CN 201110064775A CN 102213283 A CN102213283 A CN 102213283A
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- brake
- flank
- brake drum
- drum cover
- bearing portion
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Abstract
The invention provides a brake drum cover structure of a drum type brake. In a drum type brake, the largest bear-supporting part of the brake drum cover for supporting the drum type brake structure is reinforced and the lightweight is greatly realized while the desired rigidity of the brake drum cover is maintained. In a brake drum cover (7), first and second rib portions (50, 51) are arranged on the inner surface of the brake drum cover (7). The first and second rib portions (50, 51) respectively connect a support bearing part (20) for supporting a pair of brake shoes (24) with the relative two points (P1,P2) of the outer circumference of the brake drum cover (7) into one piece, which also connect a cam bearing part (21) for supporting a brake cam for driving the brake shoes (24) with the relative two points (P3,P4) of the outer circumference of the brake drum cover (7) into one piece.
Description
Technical field
The present invention relates to vehicle uses, mainly is that two-wheeled motorcycle is constructed with brake drum cover drum brake, supporting drum brake mechanism.
Background technique
In the past, the drum brake that two-wheeled motorcycle is used etc. constitutes, have: be formed on the wheel hub of wheel and accommodate the brake drum of drum brake mechanism, with the brake drum cover that is provided with and covers its opening in the mode that can not rotate with respect to this brake drum, the liner of a pair of brake shoe by making the drum brake mechanism that is bearing on the brake drum cover is with respect to the brake disc contact of brake drum inner peripheral surface or separate, carrying out braking maneuver or braking maneuver removes, but in this drum brake, the internal surface of known bulging cap at brake drum cover is provided with the structure (with reference to aftermentioned patent documentation 1) of rib.
Patent documentation 1: No. 3640659 communique of Japan Patent
Yet on the brake drum cover of described drum brake, because effect has braking force, so need guarantee high rigidity, in the structure of described patent documentation 1, described rib helps the reinforcement of brake drum cover.On the other hand, with in recent years environmental problem accordingly, the performance of each constituent part is kept or is improved in expectation, makes its lightweight simultaneously, this expectation also is same for brake drum cover.
Summary of the invention
The present invention is the invention of making in view of this situation, its purpose is to provide a kind of brake drum cover structure of drum brake of novelty, can carry out the concentrated area to the part that brake drum cover is subjected to high load strengthens, and when keeping its desired rigidity, seek significantly lightweight, can satisfy described expectation.
To achieve these goals, first is characterised in that, a kind of brake drum cover structure of drum brake, accommodate drum brake mechanism in the brake drum on being formed at hub for vehicle wheel, and cover the opening of described brake drum by the brake drum cover that is not provided with revolvably, on described brake drum cover, have: block bearing portion, it supports the supporting axle that can support a pair of brake shoe of drum brake mechanism scalablely; Camshaft bearing portion, it supports being provided with the camshaft that makes described brake shoe carry out the brake cam of scalable action, is provided with first flank and second flank integratedly at the internal surface of described brake drum cover, wherein,
First flank radially extends from described block bearing portion, and 2 that the outer periphery of this block bearing portion and brake drum cover are relative with described block bearing portion connect to one, described second flank radially extends from described camshaft bearing portion, and that the outer periphery of this camshaft bearing portion and brake drum cover are relative with described camshaft bearing portion 2 connect to one.
To achieve these goals, second feature is, in the structure of described technological scheme 1 record, is provided with the 3rd flank and protrusion integratedly at the internal surface of described brake drum cover, wherein, described the 3rd flank links an end of described first flank and an end of described second flank; Described protrusion is between the other end of the other end of described first flank and described second flank, links bearing cartridge portion and its outer periphery of described brake drum cover along radial direction.
To achieve these goals, the 3rd feature is, in the structure of described technological scheme 1 or 2 records, internal surface at described brake drum cover is provided with the 4th flank and the 5th flank integratedly, wherein, extend along diametric(al) at the center that described the 4th flank passes brake drum cover, and an end of described first flank and the other end of described second flank are connected to one; Described the 5th flank passes described center and extends along diametric(al), and a other end of described first flank and an end of described second flank are connected to one.
The effect of invention
Invention according to every technological scheme record, when break is worked, concentrate reinforcement by first flank and second flank to directly bearing block bearing portion braking force, brake drum cover and camshaft bearing portion, can increase substantially the rigidity of these bearing portions, even other part of brake drum cover is formed thin-walled, also can keep as the needed rigidity of brake drum cover, and, can realize the lightweight of brake drum cover, its result, the performance of drum brake be can improve, and himself lightweight, cost reduction sought.
In addition, especially, according to second feature, the 3rd flank links an end of described first flank and an end of second flank, and protrusion links bearing cartridge portion and its outer periphery of brake drum cover along radial direction between the other end of the other end of first flank and second flank, thus, can further improve the rigidity of block bearing portion and camshaft bearing portion, and, can seek the further lightweight of brake drum cover.
And, especially according to the 3rd feature, the 4th flank connects to one with an end of first flank and the other end of second flank, the 5th flank connects to one with a other end of first flank and an end of described second flank, thus, the rigidity of block bearing portion and camshaft bearing portion can be further improved, the further lightweight of brake drum cover can be sought.
Description of drawings
Fig. 1 is the side view of front-wheel part of two-wheeled motorcycle with brake drum cover structure of drum brake of the present invention.
Fig. 2 is the amplification view along the 2-2 line of Fig. 1.
Fig. 3 is the amplification view along the 3-3 line of Fig. 1.
Fig. 4 is the sectional view along the 4-4 line of Fig. 2.
Fig. 5 is an inner side view of pulling down the brake drum cover of drum brake mechanism.
Fig. 6 is the inboard stereogram of brake drum cover.
The explanation of reference character
4 hubs for vehicle wheel
5 brake drums
6 drum brake mechanisms
7 brake drum covers
7P drum cap
10 bearing cartridge portions
20 block bearing portions
21 camshaft bearing portions
23 supporting axles
24 brake shoes
30 brake cams
50 first flanks
50A one end
50B the other end
51 second flanks
51A one end
51B the other end
52 the 3rd flanks
53 the 4th flanks
55 protrusions
2 points that the outer periphery of P1, P2 brake drum cover 7 and block bearing portion 20 are relative
2 points that the outer periphery of P3, P4 brake drum cover 7 and camshaft bearing portion 21 are relative
Embodiment
Below, specify embodiments of the present invention based on embodiments of the invention shown in the drawings.
Present embodiment is the situation that the drum brake with brake drum cover structure of the present invention is implemented on the front wheel of two-wheeled motorcycle.
Among Fig. 1, front wheel W goes up via axletree 2 rotations at axletree line 2a (with reference to Fig. 2) and freely is supported on the fork 1F of front fork 1, described front fork 1 can be supported on the vehicle body frame of two-wheeled motorcycle with turning to, be provided with the drum brake that is used for it is implemented the internal tensional type of braking on this front wheel W, this drum brake has brake drum cover structure of the present invention.
Shown in Fig. 1～4, drum brake has: be located at brake drum 5 on the hub for vehicle wheel 4 of front wheel W integratedly, be housed in the drum brake mechanism 6 in this brake drum 5 and cover the brake drum cover 7 of the opening 5M of brake drum 5, the engagement portion 9 of front fork 1 can be fastened in the groove radially 8 on the outer surface that is formed at this brake drum cover 7 slidably, thereby make brake drum cover 7 can not rotate (with reference to Fig. 3) with respect to brake drum 5.
The axletree 2 that is supported on the front fork 1 is applied in the bearing cartridge portion 10 of the central part that is integrally formed in hub for vehicle wheel 4 via bearing 3, and front wheel W is supported between the fork 1F with rotating freely.
An axial end face of brake drum 5 forms opening 5M and forms the cylindric of hollow, contains drum brake mechanism 6 in the empty therein recess 5C.Inner peripheral surface package at brake drum 5 has brake disc 11.
On the other hand, described brake drum cover 7 forms discoid, and heart portion has axis hole 15 therein, and described axletree 2 runs through the sleeve 16 that is inlaid in this axis hole 15.In addition, the opening 5M of brake drum 5 is braked drum and covers 7 coverings, and the outer circumferential face of brake drum cover 7 can be movingly with the relative rotation with respect to the inner peripheral surface of the opening 5M of brake drum 5 via labyrinth 17.
Be supported with drum brake in the hollow recess 5C that is housed in brake drum 5, internal tensional type mechanism 6 at the internal surface of brake drum cover 7.On the bulging cap 7P of brake drum cover 7, two outer ends on the diameter line L1-L1 of the central axis that passes brake drum cover 7 (with reference to Fig. 5) are provided with the block bearing portion 20 and the camshaft bearing portion 21 of boss shape integratedly.Block bearing portion 20 is connected with the internal surface in the outer periphery of brake drum cover 7 integratedly, and on the supporting axle 23 that is supported by this block bearing portion 20 along supporting axis 23a, free rotation ground supporting the cardinal extremity of a pair of brake shoe 24,24 that is circular-arc.And engaging respectively at the circular-arc outer surface of a pair of brake shoe 24,24 can be with respect to described brake disc 11 contacts or the brake facing 25,25 that separates.Between the base portion of a pair of brake shoe 24,24 with and front end between open frame respectively the braking backspring 26,27 that is made of extension spring arranged, these braking backsprings 26,27 to the undergauge direction promptly from brake disc 11 away from direction suppress a pair of brake shoe 24,24.Described camshaft bearing portion 21 one are connected with the internal surface in the outer periphery of brake drum cover 7, are supported in this camshaft bearing portion 21 along camshaft line 29a camshaft 29 with rotating freely, have clamped oil seal 45 between this camshaft 29 and camshaft bearing portion 21.The inner at camshaft 29 outstanding in hollow recess 5C is integrally formed with elliptoid brake cam 30.The free end that is provided with cam lock bracket 31,31 of described a pair of brake shoe 24,24 relatively is located at the both sides of the camming surface of this brake cam 30, and the free end of a pair of brake shoe 24,24 is crimped on the camming surface of brake cam 30 by the elastic force of described braking backspring 26,27.In addition, the outer end of camshaft 29 is outstanding to the outside from the outer surface of brake drum cover 7, carves thereon and is provided with comb teeth 32 (with reference to Fig. 1).And the cardinal extremity of brake arm 34 is fixed on the outer end of camshaft 29 by bolt, nut 36.Between the base portion and brake drum cover 7 of brake arm 34, linking has by being turned round the arm backspring 35 that helical spring constitutes, and the elastic force of this arm backspring 35 suppresses brake arm 34 to brake releasing position (Fig. 4 position).Brake arm 34 prolongs to the radial outside of brake drum cover 7, and linking in its outer end has the independent brake usefulness and the front and back wheels interlock that are respectively applied for front-wheel W to brake two braking cables 38,39 (with reference to Fig. 1) of usefulness.As long as optionally a certain in these braking cables 38,39 is drawn, brake arm 34 just can be swung to the braking maneuver position.Swing to the braking maneuver position by brake arm 34, camshaft 29 rotations, the elastic force of these brake cam 30 opposing braking backsprings 26,27 makes a pair of brake shoe 24,24 rotate along the hole enlargement direction around supporting axle 23, thereby make brake disc 11 rubbing contact of the brake facing 25,25 and brake drum 5 inner peripheral surfaces of these outer circumferential faces, can implement braking front wheel W.
In addition, traction by brake off cable 38 (or 39), brake arm 34 is separated the position swing by the elastic force of arm backspring 35 to braking maneuver, camshaft 29 turns to brake releasing position, the elastic force that a pair of brake shoe 24,24 passes through braking backspring 26,27 is to the undergauge rotated position, and the braking of front wheel W is disengaged.
But the brake drum cover 7 in the present embodiment constitutes, and keeps its high rigidity and carry out braking maneuver reliably, and the generation of ringing when preventing braking maneuver, seeks significantly lightweight simultaneously.
Shown in Fig. 5,6, internal surface at the bulging cap 7P of brake drum cover 7, two end part at the diameter line L1-L1 at the center of passing brake drum cover 7, be formed with described block bearing portion 20 and described camshaft bearing portion 21 respectively, and be formed with first flank 50 of straight line shape and second flank 51 of straight line shape respectively, wherein, first flank 50 radially extends and 20 2 relative P1, the P2 of the outer periphery of this block bearing portion 20 and brake drum cover 7 and described block bearing portion is combined into one from block bearing portion 20; Second flank 51 radially extends and 21 2 relative P3, the P4 of the outer periphery of this camshaft bearing portion 21 and brake drum cover 7 and described camshaft bearing portion is combined into one from camshaft bearing portion 21, and roughly another diameter line L2-L2 and the almost parallel ground extension mutually of quadrature of diameter line L1-L1 with center by brake drum cover 7 in first flank 50 and 51 clampings of second flank.
And, internal surface at the bulging cap 7P of brake drum cover 7 has been wholely set the 3rd flank 52 and protrusion 55, wherein, the 3rd flank 52 links an end 50A of described first flank 50 and an end 51A of second flank 51, protrusion 55 is between the other end 51B of the other end 50B of described first flank 50 and described second flank 51, radially links the bearing cartridge portion 10 of brake drum cover 7 and the outer periphery of brake drum cover 7.And described the 3rd flank 52 extends with respect to described diameter line L1-L1 almost parallel ground, and in addition, described protrusion 55 extends along described another diameter line L2-L2.Outer surface side at protrusion 55 is formed with described groove 8 (with reference to Fig. 3).
And, in addition, internal surface at the bulging cap 7P of brake drum cover 7 has been wholely set the 4th flank 53 and the 5th flank 54, wherein, the 4th flank 53 passes the center of brake drum cover 7 and extends along diametric(al), and an end 50A of described first flank 50 and the other end 51B of described second flank 51 connected to one, the 5th flank 54 passes the center of brake drum cover 7 and extends along diametric(al), and a other end 50B of described first flank 50 and an end 51A of described second flank 51 connected to one, the center that the 4th flank 53 and the 5th flank 54 pass brake drum cover 7 intersects mutually.
And, in addition, at the internal surface of the bulging cap 7P of brake drum cover 7, three auxiliary flanks 59,60,61 of three auxiliary flanks 56,57,58 of the side that the peripheral part of the peripheral part of block bearing portion 20 and bearing cartridge portion 10 is linked, the opposite side that links with peripheral part to the peripheral part of camshaft bearing portion 21 and bearing cartridge portion 10 form symmetrically with respect to described another diameter line L2-L2.
But, because the internal surface at the bulging cap 7P of brake drum cover 7 is provided with first flank 50 and second flank 51 integratedly, wherein, first flank 50 and second flank 51 radially extend from block bearing portion 20 and camshaft bearing portion 21, and 2 respectively that the outer periphery of this block bearing portion 20 and brake drum cover 7 and described block bearing portion 20 is relative P1, P2 is combined into one, 2 P3 that the outer periphery of camshaft bearing portion 21 and brake drum cover 7 and described camshaft bearing portion 21 is relative, P4 is combined into one, thus, when carrying out braking maneuver, can strengthen by block bearing portion 20 and camshaft bearing portion 21 concentrated areas that first flank 50 and 51 pairs of second flanks directly bear braking force, and can make these bearing portions 20, improve in 21 rigidity concentrated area, its result is, even other part of brake drum cover 7 is formed thin-walled, also can keep as brake drum cover 7 necessary rigidity, seek its lightweight.
And, internal surface at the bulging cap 7P of brake drum cover 7 has been wholely set the 3rd flank 52 and protrusion 55, wherein, the 3rd flank 52 links an end 50A of described first flank 50 and an end 51A of second flank 51, protrusion 55 is between the other end 51B of the other end 50B of described first flank 50 and described second flank 51, radially link the bearing cartridge portion 10 of brake drum cover 7 and the outer periphery of brake drum cover 7, thus, the rigidity of block bearing portion 20 and camshaft bearing portion 21 is further improved, seek the further lightweight of brake drum cover 7.
And, in addition, internal surface at the bulging cap 7P of brake drum cover 7 has been wholely set the 4th flank 53 and the 5th flank 54, wherein, the 4th flank 53 connects to one with an end 50A of described first flank 50 and the other end 51B of described second flank 51, the center that the 5th flank 54 passes brake drum cover 7 connects to one along the diametric(al) extension and with a other end 50B of described first flank 50 and an end 51A of described second flank 51, thus, the rigidity of block bearing portion 20 and camshaft bearing portion 21 is further improved, seek the further lightweight of brake drum cover.
More than, embodiments of the invention are illustrated, still, the invention is not restricted to this embodiment, can implement various embodiments within the scope of the invention.
For example, in described embodiment, the situation on the front wheel that the brake drum cover of described drum brake structure is implemented in two-wheeled motorcycle is illustrated, still, also this structure can be implemented in its rear wheel or has other wheels of drum brake.
Claims (3)
1. the brake drum cover of a drum brake is constructed, accommodate drum brake mechanism (6) in the brake drum (5) on being formed at hub for vehicle wheel (4), and cover the opening (5M) of described brake drum (5) by the brake drum cover (7) that is not provided with revolvably, on described brake drum cover (7), have: block bearing portion (20), it supports supporting axle (23), and described supporting axle (23) is can scalable mode supporting a pair of brake shoe (24,24) of drum brake mechanism (6); Camshaft bearing portion (21), it supports camshaft (29), and described camshaft (29) is provided with the brake cam (30) that makes described brake shoe (24,24) carry out scalable action, it is characterized in that:
Internal surface at described brake drum cover (7) is provided with first flank (50) and second flank (51) integratedly, wherein, first flank (50) radially extends from described block bearing portion (20), and the two point (P1 that the outer periphery of this block bearing portion (20) and brake drum cover (7) are relative with described block bearing portion (20), P2) connect to one, described second flank (51) radially extends from described camshaft bearing portion (21), and the two point (P3 that the outer periphery of this camshaft bearing portion (21) and brake drum cover (7) are relative with described camshaft bearing portion (21), P4) connect to one.
2. the brake drum cover of drum brake as claimed in claim 1 is constructed, it is characterized in that: the internal surface at described brake drum cover (7) is provided with the 3rd flank (52) and protrusion (55) integratedly, wherein, described the 3rd flank (52) links an end (50A) of described first flank (50) and an end (51A) of described second flank (51); Described protrusion (55) is between the other end (51B) of the other end of described first flank (50) (50B) and described second flank (51), links the bearing cartridge portion (10) of described brake drum cover (7) and the outer periphery of brake drum cover (7) along radial direction.
3. the brake drum cover of drum brake as claimed in claim 1 or 2 is constructed, it is characterized in that: the internal surface at described brake drum cover (7) is provided with the 4th flank (53) and the 5th flank (54) integratedly, wherein, described the 4th flank (53) passes the center of brake drum cover (7) and extends along diametric(al), and an end (50A) of described first flank (50) and the other end (51B) of described second flank (51) are connected to one; Described the 5th flank (54) passes described center and extends along diametric(al), and the other end (50B) of described first flank (50) and an end (51A) of described second flank (51) are connected to one.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010-066314 | 2010-03-23 | ||
| JP2010066314A JP5363388B2 (en) | 2010-03-23 | 2010-03-23 | Brake panel structure of drum brake |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102213283A true CN102213283A (en) | 2011-10-12 |
| CN102213283B CN102213283B (en) | 2013-10-16 |
Family
ID=44744729
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110064775 Active CN102213283B (en) | 2010-03-23 | 2011-03-11 | Brake drum cover structure of drum type brake |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP5363388B2 (en) |
| CN (1) | CN102213283B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105143703A (en) * | 2013-06-28 | 2015-12-09 | 威伯科欧洲公司 | Brake cylinder |
| CN111295530A (en) * | 2017-11-09 | 2020-06-16 | 罗伯特·博世有限公司 | Brake drum for drum brake of vehicle |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102910242B (en) * | 2012-11-14 | 2014-10-01 | 苏州华胜达铝业有限公司 | Brake assembly for motorcycle hub |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5697638A (en) * | 1980-01-08 | 1981-08-06 | Yamaha Motor Co Ltd | Drum brake |
| JPS59144829A (en) * | 1983-02-05 | 1984-08-20 | Honda Motor Co Ltd | Brake device |
| DE19705831A1 (en) * | 1997-02-15 | 1998-08-20 | Itt Mfg Enterprises Inc | Cast drum brake support dish |
| CN1285028A (en) * | 1998-02-06 | 2001-02-21 | 大众汽车有限公司 | Brake anchor plate for drum break of motor vehicle |
| CN1524167A (en) * | 2001-07-02 | 2004-08-25 | 本田技研工业株式会社 | Waterproof structure of drum brake |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04316726A (en) * | 1991-04-15 | 1992-11-09 | Akebono Brake Res & Dev Center Ltd | Integral type backing plate for drum brake |
| JP2554095Y2 (en) * | 1992-03-04 | 1997-11-12 | 株式会社曙ブレーキ中央技術研究所 | Integrated backing plate for drum brake |
| JP2005344833A (en) * | 2004-06-03 | 2005-12-15 | Nissin Kogyo Co Ltd | Back plate for vehicular drum brake |
-
2010
- 2010-03-23 JP JP2010066314A patent/JP5363388B2/en active Active
-
2011
- 2011-03-11 CN CN 201110064775 patent/CN102213283B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5697638A (en) * | 1980-01-08 | 1981-08-06 | Yamaha Motor Co Ltd | Drum brake |
| JPS59144829A (en) * | 1983-02-05 | 1984-08-20 | Honda Motor Co Ltd | Brake device |
| DE19705831A1 (en) * | 1997-02-15 | 1998-08-20 | Itt Mfg Enterprises Inc | Cast drum brake support dish |
| CN1285028A (en) * | 1998-02-06 | 2001-02-21 | 大众汽车有限公司 | Brake anchor plate for drum break of motor vehicle |
| CN1524167A (en) * | 2001-07-02 | 2004-08-25 | 本田技研工业株式会社 | Waterproof structure of drum brake |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105143703A (en) * | 2013-06-28 | 2015-12-09 | 威伯科欧洲公司 | Brake cylinder |
| CN105143703B (en) * | 2013-06-28 | 2018-02-06 | 威伯科欧洲公司 | brake cylinder |
| CN111295530A (en) * | 2017-11-09 | 2020-06-16 | 罗伯特·博世有限公司 | Brake drum for drum brake of vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2011196515A (en) | 2011-10-06 |
| CN102213283B (en) | 2013-10-16 |
| JP5363388B2 (en) | 2013-12-11 |
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