Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
  • F16D51/00—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like
  • F16D51/16—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like shaped as brake-shoes pivoted on a fixed or nearly-fixed axis
  • F16D51/32—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like shaped as brake-shoes pivoted on a fixed or nearly-fixed axis with three or more brake shoes
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
  • F16D65/00—Parts or details
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
  • F16D65/00—Parts or details
  • F16D65/02—Braking members; Mounting thereof
  • F16D65/04—Bands, shoes or pads; Pivots or supporting members therefor
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
  • F16D65/00—Parts or details
  • F16D65/02—Braking members; Mounting thereof
  • F16D65/04—Bands, shoes or pads; Pivots or supporting members therefor
  • F16D65/08—Bands, shoes or pads; Pivots or supporting members therefor for internally-engaging brakes
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
  • F16D2121/00—Type of actuator operation force
  • F16D2121/14—Mechanical

Definitions

• the present invention relates to a brake shoe of a drum brake according to the preamble of claim 1, a brake shoe of a drum brake according to the preamble of claim 5, a brake shoe set according to the preamble of claim 13 and a drum brake according to the preamble of
• Brake shoes are pivotally mounted on a brake shoe carrier, which is held as a support pin on a relation to the brake drum twist-proof carrier disk.
• Object of the present invention is to provide a brake shoe or a
• Brake shoe set or a drum brake of each generic type to develop so that on the friction surface of the brake drum during actuation as uniform as possible pressure distribution is achieved.
• This object is achieved by a brake shoe with the features of claim 1, by a brake shoe with the features of claim 5, a
• Brake shoe set with the features of claim 13 and by a
• Extension portion of a web extending away from the brake pad support sole and at its distal end an articulation is formed and is provided on the brake drum side facing the extension portion a guide for actuating an adjacent brake shoe.
• a trained brake shoe can be articulated by an actuator and at the same time operate an operatively connected with this brake shoe adjacent brake shoe on the guide.
• the brake shoe according to claim 5 is designed such that at the articulation opposite free end of the web
• Actuator is provided that can be brought into operative connection with a guide of the adjacent brake shoe.
• the actuating element is formed on the respective brake shoes as a rolling element with a parallel to the axis of symmetry of the brake drum aligned axis of rotation.
• a rolling element allows a simple and inexpensive to implement motion control of the brake shoe.
• the ratio A / R is between 0.6 and 0.9, where R is the radius of the friction surface of the brake pad and A is the distance between the brake drum axis and the articulation of the brake shoe on the brake shoe. This ratio guarantees optimal strength and performance
• Friction distribution in the drum brake Due to the optimized distribution of force and friction, the maximum temperature properties as well as the load duration are also known from the prior art
• Drum brakes improved.
• the service life of such a drum brake according to the invention is also increased by the overall larger used
• the ratio of an angle swept by the brake pad to an angle which extends from the end of the brake pad facing away from the free end of the brake pad to the linkage is between 2/3 and 5, in particular between 2/3 and 5 / 3 system.
• FIG. 1 shows a perspective view of an embodiment variant of a drum brake according to the invention
• FIG. 4 a shows a plan view of an embodiment variant of a first brake shoe according to the invention
• Figure 4b is a plan view of a further embodiment of a
• Figure 5 is a plan view of an embodiment of a
• FIG. 6a shows a variant of an embodiment according to the invention
• FIG. 6b shows a further embodiment variant of a device according to the invention
• Brake shoe set in a top view
• Drum brake and other parts are not meant to be limiting, that is, by different working positions or the
• the reference numeral 1 denotes a total embodiment of a drum brake according to the invention. She has one
• Actuating device 4 which is connected to a arranged on a support 3 drive. As shown in FIGS. 2 and 3, more than two brake shoes 10, 20 are located inside the brake drum 2 in the brake drum 2
• Each of the brake shoes 10, 20 is pivotally mounted on a brake shoe carrier 5, 6, wherein the brake shoe carrier 5, 6 fixed to a
• Carrier disk 8 is attached.
• FIGS. 4a and 4b The embodiment shown in FIGS. 4a and 4b
• Brake shoe 10 is provided with a brake pad support sole 103, which has a support surface 104 on which a brake pad 105 with a Friction surface 106, which is contacted with the inner friction surface of the brake drum 2, is attached.
• the brake pad support sole 103 is connected, for example, by welding to a web 101, whose one end 1 16 via an actuating element 1 13 with the actuator 4 shown in Figures 2 and 3 in
• the actuating element 1 13 is preferably formed as a rolling element 1 15 with a parallel to the axis of symmetry of the brake drum 2 aligned axis of rotation, wherein the suspension of the rolling element 1 15 preferably via a pin 1 14 takes place in a groove 1 12 in the actuator 4
• the web 101 is extended at its other end by an extension portion 102 which extends away from the brake pad support sole 103 and at its distal end a preferably designed as a bore articulation 109 is formed for a trained as a fastening pin brake shoe carrier 5, 6, via which the brake shoe 10 is pivotally connected to the stationary carrier disk 8.
• a guide for actuating an adjacent brake shoe 20 is provided, as shown here, preferably as in the brake drum 2 facing side 1 17 of the extension portion 102 inserted guide member 1 18 is formed.
• the guide element 1 18 is flat according to a variant shown in Figure 4a and preferably at an angle to the brake drum. 2
• Guide member 1 18 in the brake pad support sole 103 near region of the web 101 projects and the other end protrudes into the extension portion 102.
• the transitions between the exposed portion of the guide member 1 18 and the brake drum 2 facing side 1 17 of the extension portion 102 and the Bremsbelagitatisohle 103 near area of the web 101 are while running obtuse, preferably in an angular range of about 130 ° to 160 °.
• the guide element 1 18 according to a variant shown in Figure 4b flat or the contour of the brake drum 2 facing side 1 17 of the extension portion 102 following slightly curved in the brake drum 2 facing side to be inserted 17 1 of the extension portion 102.
• the guide can also be designed as a guide track formed on the side of the extension section 102 facing the brake drum 2.
• Brake pad support sole 203 is formed, which has a support surface 204 to which at least one arc-shaped brake pad 205 is attached.
• the actuating element 213 is provided on the web 201, that in operative connection with the guide of the adjacent brake shoe 10 can be brought, so that one through the
• Actuator 4 triggered actuation of the first brake shoe 10 via the actuating element 213 and the guide on the extension portion 102 of the brake shoe 10, a simultaneous movement of the brake shoe 20 is driven.
• the actuating element 213 is preferred as the actuating element 1 13 of the first brake shoe 10 as a rolling element 215 with a parallel to
• an extension portion 202 is provided which extends away from the brake pad support sole 203 and at its distal end an articulation 209 is formed, which is formed in the same manner as the articulation of the brake shoe 10.
• a first bore 1 10 is provided, which serves to support a first return element 7, with which the operating means 4 in operative connection with the brake shoes 10 are coupled together. Since preferably designed as a tension spring return element 7 pulls after done
• Actuator 4 were moved apart from its rest position into a braking position, the two brake shoes 10 when returning the
• a second bore 1 1 1 is provided on the web 101, which serves to hold a second return element 7, with which the with the
• Actuator 4 operatively connected brake shoe 10 and the operable via the leadership of this brake shoe 10 adjacent brake shoe 20 are coupled together.
• the second breakpoint of this return element 7 is a bore 210 in the web 201 of the second brake shoe 20.
• this preferably also designed as a tension spring return element 7 the second brake shoe 20 after a successful braking operation by the movement of the actuating device 4 in operative connection with the brake shoe 10th also moved back to its initial position by the tensile force of the return member 7 back to its original position.
• Ratio A / R is between 0.6 and 0.9. According to a special
• this ratio A / R is between 0.6 and 0.7.
• Extension portion 102, 202 of the respective brake shoes 10, 20 are sized so that, viewed from the brake drum axis C from the ratio of a from the brake lining 105, 205 swept angle ⁇ , ⁇ to an angle ß, ⁇ , which extends from the free end of the respective brake shoe 10, 20 opposite end of the brake pad 105, 205 to the link 109, 209, between 2/3 and 5 lies.
• this ratio of the angle ⁇ , ⁇ to the angle ⁇ , ⁇ is between 2/3 and 5/3.
• Brake shoe 20 is preferably between 1 10 ° and 180 °. According to a particularly preferred embodiment, the sum of these angles is between 1 10 ° and 130 °.
• Brake shoe 20 which is deflected on the primary brake shoe 10, between the free end 1 16 of the primary brake shoe 10 and the linkage 5, 6 of the primary brake shoe 10 in operative connection with secondary brake shoe 20 more than 180 °.
• drum brake according to the invention which preferably consists of two
• Brake shoe sets each with a primary brake shoe 10 and a secondary brake shoe 20 are, as can be clearly seen in Figures 2 and 3, all brake shoes with the one in the actuator 4 operable. It is also conceivable that only one of the primary brake shoes 10, a secondary brake shoe 20 is coupled.
• the extension portions 102, 202 of the two secondary brake shoes 20 are arranged crosswise.
• At each of the brake shoe carrier 5, 6 is preferably a respective primary brake shoe 10 and a secondary brake shoe 20 via the respective articulation 109, 209 stored.
• the actuating device 4 is preferably as a cam or camshaft
• Actuating device 4 as a brake wedge or working cylinder.
• Embodiments as electrical or electromechanical devices, for example with a gear element as an actuating device 4 are conceivable.
• the actuating element can also be designed as a replaceable incorporated gap-compensating element.
• a slack adjuster can be integrated. The invention is not limited to the embodiments described herein

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Braking Arrangements (AREA)

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Publications (2)

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Citations (1)

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• 2010
  • 2010-05-25 DE DE102010021393A patent/DE102010021393A1/de not_active Ceased
• 2011
  • 2011-05-23 EP EP11729265.6A patent/EP2577086B1/de active Active
  • 2011-05-23 JP JP2013511630A patent/JP6120768B2/ja active Active
  • 2011-05-23 WO PCT/EP2011/058354 patent/WO2011147771A2/de not_active Ceased
  • 2011-05-23 CN CN201180025766.XA patent/CN102906443B/zh active Active
  • 2011-05-23 KR KR1020127033052A patent/KR101852211B1/ko active Active
  • 2011-05-23 RU RU2012156067/11A patent/RU2569340C2/ru active
  • 2011-05-23 BR BR112012029736-8A patent/BR112012029736B1/pt not_active IP Right Cessation
• 2012
  • 2012-11-20 US US13/682,234 patent/US20130126283A1/en not_active Abandoned

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