US3908843A - Brake system - Google Patents

Brake system Download PDF

Info

Publication number
US3908843A
US3908843A US444615A US44461574A US3908843A US 3908843 A US3908843 A US 3908843A US 444615 A US444615 A US 444615A US 44461574 A US44461574 A US 44461574A US 3908843 A US3908843 A US 3908843A
Authority
US
United States
Prior art keywords
valve
flow
boom
orifice
actuator
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 - Lifetime
Application number
US444615A
Other languages
English (en)
Inventor
Fred W Noller
James Leroy Campbell
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.)
Massey Ferguson Inc
Original Assignee
Massey Ferguson Inc
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
Application filed by Massey Ferguson Inc filed Critical Massey Ferguson Inc
Priority to US444615A priority Critical patent/US3908843A/en
Priority to CA218,743A priority patent/CA1012498A/en
Priority to AU77742/75A priority patent/AU488755B2/en
Priority to FR7504640A priority patent/FR2272870B1/fr
Priority to GB6752/75A priority patent/GB1493204A/en
Priority to ES434924A priority patent/ES434924A1/es
Application granted granted Critical
Publication of US3908843A publication Critical patent/US3908843A/en
Assigned to J. HENRY SCHRODER BANK & TRUST COMPANY, A NEW YORK BANKING INSTITUTION AS TRUSTEE, SIEVERS, GEORGE R., AS INDIVIDUAL TRUSTEE reassignment J. HENRY SCHRODER BANK & TRUST COMPANY, A NEW YORK BANKING INSTITUTION AS TRUSTEE SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MASSEY-FERGUSON, INC.
Assigned to J. HENRY SCHRODER BANK & TRUST COMPANY, A NY BANKING INSTITUTION (TRUSTEE), SIEVERS, GEORGE R. (INDIVIDUAL TRUSTEE) reassignment J. HENRY SCHRODER BANK & TRUST COMPANY, A NY BANKING INSTITUTION (TRUSTEE) SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MASSEY-FERGUSON INC., A MD. CORP.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/38—Cantilever beams, i.e. booms;, e.g. manufacturing processes, forms, geometry or materials used for booms; Dipper-arms, e.g. manufacturing processes, forms, geometry or materials used for dipper-arms; Bucket-arms
    • E02F3/382—Connections to the frame; Supports for booms or arms
    • E02F3/384—Connections to the frame; Supports for booms or arms the boom being pivotable relative to the frame about a vertical axis

Definitions

  • the present braking system overcomes the above problems by preventing override from occurring with a brake on the boom to prevent it from swinging whenever the boom is not being positively swung by the actuator.
  • the system can result in the elimination of the need for speed control and cushioning under some circumstances and has the further advantage of stabilizing the position of the boom, for example, during the digging operation when trenching.
  • Another advantage of the system is its ability to automatically sense override and activate the brake.
  • the present invention relates to brake systems and more particularly to systems for side swingable booms mounted on vehicles which prevent side to side movement of the boom whenever the boom is not being positively positioned by the swing actuator.
  • the system includes a base in the form of a mast frame mounted on a vehicle such as a backhoe with a swingable boom support mounted on the base.
  • An actuator interconnects the base and support to provide for relative movement therebetween.
  • a means for stopping the above relative movement having as a part thereof a selective engaging member mounted on the base and an engageable member which is selectively engagable by the engaging member.
  • the engaging member for example a plate such as a brake disc or the like, is mounted on the boom support.
  • the engaging member could be a brake caliper or similar type engaging means such asa friction clutch.
  • Means for controlling the engaging member to permit selective engagement and disengagement of the engageable member are provided and can take the form of hydraulic controls where, for example, the actuator is a hydraulic cylinder. Included as part of the controls would be a control, such as a directional spool valve, for directing flow to the cylinder, an energy source, such as a driven pump and a remotely operated stopping means, such as a hydraulically operated disc brake whereby the cylinders and brake could be alternately operated to permit movement of the boom support when operating the cylinder and preventing movement when the cylinder is not being operated.
  • the controls can also include two additional valves such as check valve one each in conduits connecting to each of the directional flows from the directional spool valve, where it is bidirectional, and located between the bidirectional valve and the brake to prevent reverse flow through one conduit when the other conduit is receiving the directional flow from the control valve.
  • check valve one each in conduits connecting to each of the directional flows from the directional spool valve, where it is bidirectional, and located between the bidirectional valve and the brake to prevent reverse flow through one conduit when the other conduit is receiving the directional flow from the control valve.
  • FIG. 1 is a fragmentary elevational view of a braking system mounted on a backhoe in accordance with the present invention
  • FIG. 2 is an alternate embodiment of the braking system in FIG. 1 illustrating the use of a rotary cylinder therein;
  • FIG 3 is a schematic of controls for the system illustrated in FIG. 1;
  • FIG. 4 is a schematic of controls for the system illustrated in FIG. 2.
  • FIG. 1 a base in the form of a mast frame 10 illustrated broken away from a vehicle such as a tractor or crawler (not illustrated) on which the mast frame 10 is mounted in a conventional manner.
  • a yoke 12 is part of and mounted on the mast frame 10 and extends rearwardly of the vehicle.
  • a swingable boom support in the form of casting 14 having bifurcated extensions 16 mating with the yoke 12 upon which it swings through a horizontal plane.
  • the pivot of the boom support is formed by pins 18 aligned on a vertical axis and fixed in relation to casting 14 while being pivotal in the yoke 12.
  • a boom 20 is pivotally mounted on the casting 14 for movement through a vertical plane.
  • Actuation of the boom support is accomplished with a pair of hydraulic cylinders 22 (one illustrated) interconnecting the casting 14 with -the mast frame 10.
  • the rod end of the cylinders 22 is connected by a pin 24 which may be pivoted with respect to the rod of the cylinders 22 or a bifurcated boss 26 on the casting 14.
  • a similar pivotal connection (not illustrated) connects the cylinder 22 to the mast frame
  • a brake disc 28 preferably mounted on the pin 18. It is to be understood that the engageable member of the brake need not be a disc but could be a plate which is a segment ofa disc or any suitable plate attached to the boom support in a fixed manner.
  • the engageable member is complimentary to an engaging member in the form of a brake caliper 30 which is fixedly mounted on the yoke 12 in a position to receive a portion of the disc 28.
  • the brakes may be pneumatic or hydraulic and may include a fail safe feature whereby they are spring loaded to come on when the pressure on the brake falls. Further, the brakes can be operated on dual line systems or single lines depending on whether flow or pressure are used to actuate them. In the embodiment illustrated in FIG. 1 there is a single line 32 forming a conduit to connect the brake caliper 30 to the control means to be described below.
  • FIG. 2 illustrates an alternate embodiment to that of FIG. 1 wherein a rotary cylinder 34 which may be pneumatic or hydraulic replaces the linear cylinders 22 of FIG. 1. It is to be understood that the actuators and brakes illstrated may be other than fluidly operated, for example, an electrically controlled and operated system would be possible even though the hydraulic system illustrated is preferred for service on a backhoe.
  • the pivot is formed by the shaft 36 of the cylinder 34.
  • the shaft 36 may be continuous at the bottom end of the cylinder 34 passing through the casting 14 and terminating in the yoke 12, or could terminate in the casting 14 with an additional pin connecting the bottom of the casting 14 to the yoke 12. In either case the shaft 36 is fixed relative to the casting 14 and pivotal with respect to the yoke 12.
  • the shaft 36 passes through the rotary cylinder 34 which operates to rotate it and on which is fixedly mounted the disc 28.
  • the housing 38 of the rotary cylinder 34 is fixedly attached to the yoke 12 and in this embodiment becomes in effect a part of the base, mast frame 10, to permit the brake caliper 30 to be mounted on the housing 34 where it can engage the disc 28.
  • the line 32 connected to the caliper 30 there are three other conduits illustrated in FIG. 2 as part of the controls together with a valve assembly 40 mounted on the housing 38.
  • Line 42 is a supply
  • line 44 is a return
  • line 46 is a low pressure line connected to the return side of the fluid source.
  • FIG. 3 is a schematic of the apparatus illustrated in FIG. 1 together with the means for controlling it.
  • the control means include a bidirectional valve 48, check valves 50 and 52 and an unloading valve 54.
  • the fluid source is a pump 56 having as complimentary equipment a reservoir 58 for returning flow and a relief valve 60 to protect the pump 56.
  • the relief valve is located between a supply line 62 and return line 64 being within line 66. Both supply and return lines 62 and 64 are connected to the bidirectional valve 48 which is illustrated in a neutral position whereby flow is returned directly back to the pump 56.
  • FIG. 4 is a schematic of the apparatus illustrated in FIG. 2 together with the means for controlling it.
  • the fluid source is the same as in FIG. 3 as is the bidirectional valve 48, supply line 62, return line 64 and line 32 connected to the caliper 30.
  • Lines 68 and are replaced by the return and supply lines 42 and 44 for the rotary cylinder 34, and the valve assembly 40 is illustrated by the relief valves 80 and check valves 82 enclosed within the phantom line.
  • the check valves 82 function in the manner described for those in FIG. 3 only in this case they permit flow to be reversed to the rotary cylinder 34 to prevent anti-cavitation.
  • the relief valves 80 are to protect the rotary cylinder 34 in the manner described above for the relief valve 60 on the pump 56.
  • a common low pressure line 46 connects the components of the valve assembly 40 back to the reservoir 58. I
  • valves 50 and 52 in FIG. 3 have been replaced by the grammatically illustrated check valve and orifice assemblies 84 and 86 located in lines 88 and 90.
  • the functional combination of valve and orifice can sometimes be achieved with a properly sized orifice plate which permits free flow in one direction while restricting flow in the other direction.
  • line 88 is permitting free flow across the check valve of assembly 84
  • the check of assembly 86 closes forcing all the flow through the orifice of assembly 86 causing a pressure differential sufficient to overcome the bias on the caliper 30 and release the brake on the boom 20.
  • Reversing the flow with valve 48 reverses the function of assemblies 84 and 86 to obtain the same results of releasing the brake caliper 30.
  • With the valve 48 in the neutral position illustrated in FIG. 4 there is no flow in lines 88 and 90 and therefore no pressure differential to overcome the bias on the caliper 30'resulting in the activation of the brake.
  • the assemblies 84 and 86 of FIG. 4 are interchangeable with the checks 50 and 52 plus unloading valve 54 of FIG. 3 and vice versa.
  • the above braking systems are operative to brake the boom 20 whenever the valve 48 is not actuating the cylinders 22 or 34, and in addition to brake the boom 20 whenever an override condition occurs without requiring any further action on the part of the one operating the valve 48.
  • means for controlling said engaging member comprising: a directional valve for directing flow to said actuator, an energy source, and conduits interconnecting all the above for directing flow to said actuator to swing the boom, 21 second valve and an orifice, a conduit, containing said second valve and orifice, interconnecting said directional valve with said stopping means, said second valve preventing flow from said stopping means and said orifice restricting return flow to create a pressure differential to prevent sudden actuation of said stopping means when said directional valve is operated and to activate said stopping means when said directional valve is not in operation.
  • said directional valve is bidirectional for directing flow to said actuator in two directions enabling the boom to swing to either side of the vehicle, and including biasing means for maintaining said stopping means normally engaged, including: a third valve and second orifice; conduits, one pair of a valve and orifice in each, connecting each of the directional flows of said bidirectional valve with said stopping means to restrict reverse flow through one conduit when said other conduit is receiving the directional flow from said bidirectional valve to create a pressure differential sufficient to overcome said biasing means to release said stopping means when operating said actuator and to apply said stopping means when said actuator is not being operated.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Braking Arrangements (AREA)
  • Operation Control Of Excavators (AREA)
  • Forklifts And Lifting Vehicles (AREA)
US444615A 1974-02-21 1974-02-21 Brake system Expired - Lifetime US3908843A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US444615A US3908843A (en) 1974-02-21 1974-02-21 Brake system
CA218,743A CA1012498A (en) 1974-02-21 1975-01-27 Brake system
AU77742/75A AU488755B2 (en) 1974-02-21 1975-01-30 Brake system
FR7504640A FR2272870B1 (US07922777-20110412-C00004.png) 1974-02-21 1975-02-14
GB6752/75A GB1493204A (en) 1974-02-21 1975-02-18 Boom swing braking systems
ES434924A ES434924A1 (es) 1974-02-21 1975-02-20 Un sistema de freno.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US444615A US3908843A (en) 1974-02-21 1974-02-21 Brake system

Publications (1)

Publication Number Publication Date
US3908843A true US3908843A (en) 1975-09-30

Family

ID=23765634

Family Applications (1)

Application Number Title Priority Date Filing Date
US444615A Expired - Lifetime US3908843A (en) 1974-02-21 1974-02-21 Brake system

Country Status (5)

Country Link
US (1) US3908843A (US07922777-20110412-C00004.png)
CA (1) CA1012498A (US07922777-20110412-C00004.png)
ES (1) ES434924A1 (US07922777-20110412-C00004.png)
FR (1) FR2272870B1 (US07922777-20110412-C00004.png)
GB (1) GB1493204A (US07922777-20110412-C00004.png)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4147442A (en) * 1978-05-01 1979-04-03 Caterpillar Tractor Co. Shaft locking apparatus
US4365926A (en) * 1976-12-28 1982-12-28 Pettibone Corporation Free-hanging load carrier for boom, with brake
US4757685A (en) * 1987-08-24 1988-07-19 Caterpillar Inc. Pressure responsive hydraulic control circuit
US4797056A (en) * 1987-07-20 1989-01-10 Charles Gerold Safety brake for cement truck chute
US20050081519A1 (en) * 2003-10-16 2005-04-21 Pengfei Ma System for preventing swing wag for a work machine with a boom assembly
US20060090974A1 (en) * 2004-11-04 2006-05-04 Massimo Pinto Device and method for braking the supporting booms of an earthmoving machine

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2837220A (en) * 1953-11-18 1958-06-03 Raahe Oy Lift and transport mechanism
US3033394A (en) * 1959-06-29 1962-05-08 Kash Products Inc Multipurpose apparatus for earthworking and the like
US3136399A (en) * 1961-09-13 1964-06-09 Hough Co Frank Vehicle parking brake
US3217910A (en) * 1962-10-09 1965-11-16 Waite Inc J P Boom locking apparatus
US3762777A (en) * 1971-03-17 1973-10-02 Poclain Sa Device for controlling a winch provided with a safety device
US3791492A (en) * 1972-05-30 1974-02-12 Hydrostatic Technology Inc Caliper brake
US3830336A (en) * 1973-08-22 1974-08-20 Chance Co Personnel bucket brake for hydraulic cranes

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2837220A (en) * 1953-11-18 1958-06-03 Raahe Oy Lift and transport mechanism
US3033394A (en) * 1959-06-29 1962-05-08 Kash Products Inc Multipurpose apparatus for earthworking and the like
US3136399A (en) * 1961-09-13 1964-06-09 Hough Co Frank Vehicle parking brake
US3217910A (en) * 1962-10-09 1965-11-16 Waite Inc J P Boom locking apparatus
US3762777A (en) * 1971-03-17 1973-10-02 Poclain Sa Device for controlling a winch provided with a safety device
US3791492A (en) * 1972-05-30 1974-02-12 Hydrostatic Technology Inc Caliper brake
US3830336A (en) * 1973-08-22 1974-08-20 Chance Co Personnel bucket brake for hydraulic cranes

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4365926A (en) * 1976-12-28 1982-12-28 Pettibone Corporation Free-hanging load carrier for boom, with brake
US4147442A (en) * 1978-05-01 1979-04-03 Caterpillar Tractor Co. Shaft locking apparatus
US4797056A (en) * 1987-07-20 1989-01-10 Charles Gerold Safety brake for cement truck chute
US4757685A (en) * 1987-08-24 1988-07-19 Caterpillar Inc. Pressure responsive hydraulic control circuit
WO1989002010A1 (en) * 1987-08-24 1989-03-09 Caterpillar Inc. Pressure responsive hydraulic control circuit
US20050081519A1 (en) * 2003-10-16 2005-04-21 Pengfei Ma System for preventing swing wag for a work machine with a boom assembly
US7059126B2 (en) 2003-10-16 2006-06-13 Caterpillar Inc. System for preventing swing wag for a work machine with a boom assembly
US20060090974A1 (en) * 2004-11-04 2006-05-04 Massimo Pinto Device and method for braking the supporting booms of an earthmoving machine
US7712589B2 (en) * 2004-11-04 2010-05-11 Cnh America Llc Device and method for braking the supporting booms of an earthmoving machine

Also Published As

Publication number Publication date
ES434924A1 (es) 1976-12-16
FR2272870A1 (US07922777-20110412-C00004.png) 1975-12-26
CA1012498A (en) 1977-06-21
GB1493204A (en) 1977-11-30
AU7774275A (en) 1976-08-05
FR2272870B1 (US07922777-20110412-C00004.png) 1980-04-11

Similar Documents

Publication Publication Date Title
US8622645B2 (en) Coupler with gravity operated safety device
US7337610B2 (en) Hydraulic arrangement
US4736673A (en) Selective control device for plural kinds of oil-hydraulic actuators
US8276705B2 (en) Wheel loader
US4264014A (en) Lock out means for pivotal axle suspension cylinders
US5413452A (en) Hydraulic system for a backhoe apparatus
US11001990B2 (en) Working machine
US3695474A (en) Hydraulic control linkage for implement
CA1037355A (en) Swing flow supplemental travel for an excavator
US20220282453A1 (en) Hydraulic system of construction machine
US3618984A (en) Pilot selector valve for simultaneously controlling separate fluid circuits
US3776518A (en) Winch and control means therefor
US3908843A (en) Brake system
US11649611B2 (en) Hydraulic system of construction machine
US9902384B2 (en) Hydraulic system and work machine
US3722707A (en) Hydraulic crane control to prevent uncontrolled falling of load
US3978998A (en) Fast hoist control system
US3896617A (en) Steering system with electrically driven secondary steering means
JP2004301215A (ja) 作業用車両の油圧駆動装置
US4126082A (en) Travel-brake control system
US3893572A (en) Systems for operating and controlling hydraulically driven winches, hoists, windlasses and the like
US3458053A (en) Cable control apparatus
US7712589B2 (en) Device and method for braking the supporting booms of an earthmoving machine
JP3023541B2 (ja) 建設機械の旋回モータのブレーキ回路
CA1317528C (en) Hydraulic implement regeneration system

Legal Events

Date Code Title Description
AS Assignment

Owner name: J. HENRY SCHRODER BANK & TRUST COMPANY, A NEW YOR

Free format text: SECURITY INTEREST;ASSIGNOR:MASSEY-FERGUSON, INC.;REEL/FRAME:004164/0687

Effective date: 19830217

Owner name: SIEVERS, GEORGE R., AS INDIVIDUAL TRUSTEE

Free format text: SECURITY INTEREST;ASSIGNOR:MASSEY-FERGUSON, INC.;REEL/FRAME:004164/0687

Effective date: 19830217

AS Assignment

Owner name: SIEVERS, GEORGE R. (INDIVIDUAL TRUSTEE)

Free format text: SECURITY INTEREST;ASSIGNOR:MASSEY-FERGUSON INC., A MD. CORP.;REEL/FRAME:004583/0684

Effective date: 19860509

Owner name: J. HENRY SCHRODER BANK & TRUST COMPANY, A NY BANKI

Free format text: SECURITY INTEREST;ASSIGNOR:MASSEY-FERGUSON INC., A MD. CORP.;REEL/FRAME:004583/0684

Effective date: 19860509