GB1474855A - Annular dual piston brake arrangement and cooling circuit therefor - Google Patents

Annular dual piston brake arrangement and cooling circuit therefor

Info

Publication number
GB1474855A
GB1474855A GB3290075A GB3290075A GB1474855A GB 1474855 A GB1474855 A GB 1474855A GB 3290075 A GB3290075 A GB 3290075A GB 3290075 A GB3290075 A GB 3290075A GB 1474855 A GB1474855 A GB 1474855A
Authority
GB
United Kingdom
Prior art keywords
piston
fluid
chamber
assembly
pistons
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB3290075A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Caterpillar Inc
Original Assignee
Caterpillar Tractor Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US522390A external-priority patent/US3927737A/en
Priority claimed from US05/545,854 external-priority patent/US3941219A/en
Application filed by Caterpillar Tractor Co filed Critical Caterpillar Tractor Co
Publication of GB1474855A publication Critical patent/GB1474855A/en
Expired legal-status Critical Current

Links

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
    • F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
    • F16D55/24—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with a plurality of axially-movable discs, lamellae, or pads, pressed from one side towards an axially-located member
    • F16D55/26—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with a plurality of axially-movable discs, lamellae, or pads, pressed from one side towards an axially-located member without self-tightening action
    • F16D55/36—Brakes with a plurality of rotating discs all lying side by side
    • F16D55/40—Brakes with a plurality of rotating discs all lying side by side actuated by a fluid-pressure device arranged in or one the brake
    • 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
    • F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
    • F16D65/16—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake
    • F16D65/18—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake adapted for drawing members together, e.g. for disc brakes
    • F16D65/186—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake adapted for drawing members together, e.g. for disc brakes with full-face force-applying member, e.g. annular
    • 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
    • F16D65/78—Features relating to cooling
    • F16D65/84—Features relating to cooling for disc brakes
    • F16D65/853—Features relating to cooling for disc brakes with closed cooling system
    • 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
    • F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
    • F16D2055/0004—Parts or details of disc brakes
    • F16D2055/0058—Fully lined, i.e. braking surface extending over the entire disc circumference
    • 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
    • F16D2121/02—Fluid pressure
    • 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
    • F16D2121/02—Fluid pressure
    • F16D2121/12—Fluid pressure for releasing a normally applied brake, the type of actuator being irrelevant or not provided for in groups F16D2121/04 - F16D2121/10
    • 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
    • F16D2123/00—Multiple operation forces

Landscapes

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

Abstract

1474855 Disc brakes CATERPILLAR TRACTOR CO 6 Aug 1975 [11 Nov 1974 31 Jan 1975] 32900/75 Heading F2E In a brake assembly having annular service and secondary pistons 122, 124 respectively, the pistons are in telescoping relationship. Piston 122 is moved axially to press interleaved discs 96, 98 against a thrust surface 86 when fluid is supplied to chamber 144 via passages 145, 146. Piston 124 is normally held inoperative by fluid pressure in chamber 132 but for emergency or parking brake application the fluid supply is automatically or selectively interrupted to allow springs 138 to urge the pistons into engagement with a shoulder 140 of piston 122, and so apply the brake. Fluid may simultaneously be supplied to chamber 144 to increase the braking force. Piston 124 moves on guides 148 fixed to piston 122 and carrying a relatively light retraction spring 150 for the latter piston. Further guides 120 prevent piston rotation. On termination of service braking a predetermined volume of fluid is withdrawn from chamber 144 to limit piston retraction and hence accommodate wear. Cooling fluid is circulated through the assembly from an inlet 52 to an outlet 54 and is said to assist piston retraction. In a modification (Fig. 2, not shown) cooling fluid exits via a passage in the service piston and the chambers containing springs 138; this enables actuating chamber 144 to be arranged at a greater effective radius than in the above embodiment. The brake assembly is connected to axle housing 14 by bolts 42 and is splined at 92 to wheel hub 22. On removal of the latter and bolts 42 the assembly can be withdrawn axially as a unit. Seals 105, 106 are made of glass fibre filled polytetrafluoroethylene.
GB3290075A 1974-11-11 1975-08-06 Annular dual piston brake arrangement and cooling circuit therefor Expired GB1474855A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US522390A US3927737A (en) 1974-11-11 1974-11-11 Annular dual piston brake arrangement
US05/545,854 US3941219A (en) 1975-01-31 1975-01-31 Dual piston brake arrangement and cooling circuit therefor

Publications (1)

Publication Number Publication Date
GB1474855A true GB1474855A (en) 1977-05-25

Family

ID=27060801

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3290075A Expired GB1474855A (en) 1974-11-11 1975-08-06 Annular dual piston brake arrangement and cooling circuit therefor

Country Status (4)

Country Link
BR (1) BR7507375A (en)
ES (1) ES442521A1 (en)
FR (1) FR2290608A1 (en)
GB (1) GB1474855A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110701218A (en) * 2019-09-24 2020-01-17 内蒙古北方重型汽车股份有限公司 Oil-cooled multi-disc type service brake of mining dump truck and assembly thereof
DE102018003971B4 (en) * 2017-05-24 2021-05-06 Mazda Motor Corporation Brake device for transmission, method of providing the same and automatic transmission

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4146116A (en) * 1977-09-15 1979-03-27 Rockwell International Corporation Friction brake

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018003971B4 (en) * 2017-05-24 2021-05-06 Mazda Motor Corporation Brake device for transmission, method of providing the same and automatic transmission
CN110701218A (en) * 2019-09-24 2020-01-17 内蒙古北方重型汽车股份有限公司 Oil-cooled multi-disc type service brake of mining dump truck and assembly thereof

Also Published As

Publication number Publication date
BR7507375A (en) 1976-08-10
ES442521A1 (en) 1977-08-01
FR2290608A1 (en) 1976-06-04
FR2290608B1 (en) 1981-10-09

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Legal Events

Date Code Title Description
PS Patent sealed
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19930806