CA1104072A - Ground engaging brake for heavy vehicles - Google Patents
Ground engaging brake for heavy vehiclesInfo
- Publication number
- CA1104072A CA1104072A CA317,274A CA317274A CA1104072A CA 1104072 A CA1104072 A CA 1104072A CA 317274 A CA317274 A CA 317274A CA 1104072 A CA1104072 A CA 1104072A
- Authority
- CA
- Canada
- Prior art keywords
- ground
- engaging member
- vehicle
- operative position
- brake
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T1/00—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles
- B60T1/12—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting otherwise than by retarding wheels, e.g. jet action
- B60T1/14—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting otherwise than by retarding wheels, e.g. jet action directly on road
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A brake for preventing heavy vehicles from sliding downhill in the backward direction on a slippery surface is disclosed.
The brake comprises at least one ground-engaging member pivotally mounted on the frame of the vehicle and adapted to engage the ground, and means for pivoting such a ground-engaging member into engagement with the slippery surface, whereby, upon backward movement of the vehicle, the ground-engaging member will be positively driven into the ground by the weight of the vehicle to stop the backward movement of the vehicle. The outer ground-engaging end of the member is wedge-shape and defined a flat and surface which is upwardly inclined towards the rear of the vehicle when the ground-engaging member is in operative position.
A brake for preventing heavy vehicles from sliding downhill in the backward direction on a slippery surface is disclosed.
The brake comprises at least one ground-engaging member pivotally mounted on the frame of the vehicle and adapted to engage the ground, and means for pivoting such a ground-engaging member into engagement with the slippery surface, whereby, upon backward movement of the vehicle, the ground-engaging member will be positively driven into the ground by the weight of the vehicle to stop the backward movement of the vehicle. The outer ground-engaging end of the member is wedge-shape and defined a flat and surface which is upwardly inclined towards the rear of the vehicle when the ground-engaging member is in operative position.
Description
This invention relates to a ground engeging brake for preventing a vehicle from sliding downhill in the backward dir~ction on a slippery surface, such as ic~
~ ' ~
Various groun~ engaging braks& have been provided for preuenting downhill slidirlg of heavy vehicles in t;h~ frontward ~irection on icy surfaces, but the known devices failed to prevent backward sliding of such hr~avy vuhicles on ice or packed snow, suGh as often encountered in northern countries where the roads are o~ten covered with snow and ice for most of the winter ssason.
It is th~refore the object of the pr~senk invsntion to providr~
a braking mechanism which ensures pnsitivs braking of h~avy uehicles on slippsry surfacr~sO
The brake? in accordance with the invention, comprises at least one ground engaging member pivotally mounted on the frame of th~
vehicle and adapted to sngage the ground and means for pivoting said ground enyaging member into engagement with the slippery surface, whereby, upon backward movemsnt of the vshicle~ the ground engaging m~mber will ba positively driven into the ground by the weight of the vehicle and so stop the backward movement o~ the vehicle.
he ground engaging member is preferably adjustable in length so as to fit vehicleso~ various h~ights. In a preferrod embodiment of the ~; invention, the ground engaging MRmber i9 a hollow member mount~d on the frame and a movable msmbRr which is adjustably positioned within such ~ .
hollow membsr. The ground ~ngaging portion o~ the movable member is pointed or wedgRd so as to be mors easily driven into the ground.
BRIEF DESL~ L~
~.. ~ . - .
` The invention will now bo disclos~d, by way of example, with refRrence to the accompanying drawings in which:
Figure 1 illustrates a perspective view of a g~ound sngaging member in accordance with the invention;
Figure 2 illustrates a view taken along line 2-2 of Figure l;
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, '
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Various groun~ engaging braks& have been provided for preuenting downhill slidirlg of heavy vehicles in t;h~ frontward ~irection on icy surfaces, but the known devices failed to prevent backward sliding of such hr~avy vuhicles on ice or packed snow, suGh as often encountered in northern countries where the roads are o~ten covered with snow and ice for most of the winter ssason.
It is th~refore the object of the pr~senk invsntion to providr~
a braking mechanism which ensures pnsitivs braking of h~avy uehicles on slippsry surfacr~sO
The brake? in accordance with the invention, comprises at least one ground engaging member pivotally mounted on the frame of th~
vehicle and adapted to sngage the ground and means for pivoting said ground enyaging member into engagement with the slippery surface, whereby, upon backward movemsnt of the vshicle~ the ground engaging m~mber will ba positively driven into the ground by the weight of the vehicle and so stop the backward movement o~ the vehicle.
he ground engaging member is preferably adjustable in length so as to fit vehicleso~ various h~ights. In a preferrod embodiment of the ~; invention, the ground engaging MRmber i9 a hollow member mount~d on the frame and a movable msmbRr which is adjustably positioned within such ~ .
hollow membsr. The ground ~ngaging portion o~ the movable member is pointed or wedgRd so as to be mors easily driven into the ground.
BRIEF DESL~ L~
~.. ~ . - .
` The invention will now bo disclos~d, by way of example, with refRrence to the accompanying drawings in which:
Figure 1 illustrates a perspective view of a g~ound sngaging member in accordance with the invention;
Figure 2 illustrates a view taken along line 2-2 of Figure l;
,.
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'~, Figure 3 illu~tratea a rear vi~w af thfl ground-3ngaging devioa illuetrated in Figur~
Figure 4 illustratea a typical contrDl d~vio~ for oporating the ground-engaging devica in accordance with tho inuention; and Figure 5 illu~trat~ ~n alt0rnativ~ ~mbodiment o~ a ground-engaging d~vice in sccordance with th~ invention~
DESCRIPTION ~ L g O~DI~lE ~ T ~
~ ef~rring ~o Fi~ures 1 tn 3 of the drawings, therq i8 8hOWn ~n smbodim~nt o~ the inuentian mounted ~n tha transver~e ~haft 10 o~
tha regular tandem whesl arrangement of a hea~y vshiole. Sha~t 10 i~
~cured to tho freme 12 q~ ths uehlcle by bracing member~ 14 and norm~lly holds ~U~pen~iQn bars 16 which ~upport wheela 10.
The brake is a ground~angsging me~bsr which o~mprlaes a ~ieeue 20 m~de in two halvus 22 and securud together by bolts 24 and ; adapted to rotate ~reely on shaft 10. Two hollow m~mbsrs 26 are w~ldsd st YO to the sleevo 20 ~nd a radi~lly outer member 2~ is adjustably mounted within each hol10w member 26~ The outer member ?B haa a plurality .~ o~ holes th~roin snd thn p~ition o~ the outor mombsr within the hollow mber ~6 i~ determin~J by pin 30 snd depend~ on the hsight of th ~ha~t 10 of the ~ehlclo abovfl ground~ In the gr~und-engaging l$mit po~ition~
the outo~ mamber ia nearly uartieal and h~ld in such poaition by 8 ~able 32 interconnecting hollow m~mber 25 and ~r0m~ 12. Outer member 2~ ha3 . ~ wodge-shapod outer end de~lning an outer tlat ~nd ~urf~ce 28', which ia lnclinod upw~rdly toward the raar of the v~hlole when the graund-ongaging ~embor i~ in ground-engaging limit position. When in 3~id po~ition~
the ground-~nge91ng member axtnnds ~nly sl`ightly below the plane definQd by the lnwar ~ur~ac~ of wh~el~ 1~, whereby~ upon backward ~nvement of the vehiclett~e grnlm~n~aging mamber will b~ po~itively driuen into the groulld by the trans~er of the vehicla w~i9ht thsreon and~so etop th~ backward mov~mant of th~ uohicle.
Th~ ground-eng39ing m0mb~r i~ pivoted towards grnund-en~a~in~ posit~on by means of an sir cylinder 34 ~ounted on fram~ 12 by ~eans of bracket 36 an~ hauin~ it~ pi~ton conn~ct0d to a brackBt 37
'~, Figure 3 illu~tratea a rear vi~w af thfl ground-3ngaging devioa illuetrated in Figur~
Figure 4 illustratea a typical contrDl d~vio~ for oporating the ground-engaging devica in accordance with tho inuention; and Figure 5 illu~trat~ ~n alt0rnativ~ ~mbodiment o~ a ground-engaging d~vice in sccordance with th~ invention~
DESCRIPTION ~ L g O~DI~lE ~ T ~
~ ef~rring ~o Fi~ures 1 tn 3 of the drawings, therq i8 8hOWn ~n smbodim~nt o~ the inuentian mounted ~n tha transver~e ~haft 10 o~
tha regular tandem whesl arrangement of a hea~y vshiole. Sha~t 10 i~
~cured to tho freme 12 q~ ths uehlcle by bracing member~ 14 and norm~lly holds ~U~pen~iQn bars 16 which ~upport wheela 10.
The brake is a ground~angsging me~bsr which o~mprlaes a ~ieeue 20 m~de in two halvus 22 and securud together by bolts 24 and ; adapted to rotate ~reely on shaft 10. Two hollow m~mbsrs 26 are w~ldsd st YO to the sleevo 20 ~nd a radi~lly outer member 2~ is adjustably mounted within each hol10w member 26~ The outer member ?B haa a plurality .~ o~ holes th~roin snd thn p~ition o~ the outor mombsr within the hollow mber ~6 i~ determin~J by pin 30 snd depend~ on the hsight of th ~ha~t 10 of the ~ehlclo abovfl ground~ In the gr~und-engaging l$mit po~ition~
the outo~ mamber ia nearly uartieal and h~ld in such poaition by 8 ~able 32 interconnecting hollow m~mber 25 and ~r0m~ 12. Outer member 2~ ha3 . ~ wodge-shapod outer end de~lning an outer tlat ~nd ~urf~ce 28', which ia lnclinod upw~rdly toward the raar of the v~hlole when the graund-ongaging ~embor i~ in ground-engaging limit position. When in 3~id po~ition~
the ground-~nge91ng member axtnnds ~nly sl`ightly below the plane definQd by the lnwar ~ur~ac~ of wh~el~ 1~, whereby~ upon backward ~nvement of the vehiclett~e grnlm~n~aging mamber will b~ po~itively driuen into the groulld by the trans~er of the vehicla w~i9ht thsreon and~so etop th~ backward mov~mant of th~ uohicle.
Th~ ground-eng39ing m0mb~r i~ pivoted towards grnund-en~a~in~ posit~on by means of an sir cylinder 34 ~ounted on fram~ 12 by ~eans of bracket 36 an~ hauin~ it~ pi~ton conn~ct0d to a brackBt 37
3 -37 3ecured to 91eeVe 22~ In th~ retr~cted positinn, the grourld~engaging member ~xtends towàrd~ the rear o~ ths v0hicle and rest~ again t ~ bracket 38 secured to frame 12 Llnder aation o~ ~ apring 39 (~igure 4~ located in cylinder 34 and a~ting on its pl~torl.
F$gures 4 illustrat~3 a suitabla control sy~tam for oper~ting th~ ground-~ngsging membar of Fi.gure~ 1 to 3. Air originating f rom a convantional brake valve 40 and going to the brskes by br~ke lin~.3 42 i8 fad to cylind~r 34 through an elaotrl~ valve 44 which ie cont~ollsd by a switoh 46 scce~ibIe ta tha truek drivet. ~rak~ valve 40 i~
.
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prnvid~d with th~ conv~ntional r~39ular air supply 43D an ~merg~ncy supply 45 and stor~d in a reservoir 48.
Fi~ur~ 5 illustrates another smbodiment of the inuention mounted on ~he regula~ rear axle 50 of a truck. The ground engagillg devica compris~s a hollow member 52 pivotally mounted at 53 on a bracket 54 secured to the axlc and a w~dge shapsd msmber 55 i9 adjustably mounted ~;
in hollow member S2 by means of pin 56. In th0 ground engaging position, tha upper part of hollow member 52 bears against ths axle 50 and a ;
rubber pad 57 is provided for absorbing the shockO The groun~ engaging device i.5 operated by an air or hydraulic cylinder 58 through arms 60 and 62. In the retractsd position~ th~ ground engaging device rests ; against the axlP 50 as illustratsd in dashed lines~
The abovs disclosed brake operatss as follows: ~
`~ In the r~tracted position, ths ground sngaging device i5 . . .
, .
maintained in the upper position by a spring 59 in the air cylindsr 58.
It can be locked in retracted position by a locking pin extending through alignsd holes 64 and oo of membsr 52 and bracket ~4 rsspectivsly. When the uehicle is stopped on a ~lippsry surface, the air or hydraulio cylinder may be opsratsd to rotate the ground engaging device intD a ground sngaglng position. As soon as it touches ground, ths w~dge shaped snd ~}` of the ground engaging deuice is drivsn into ths ground automatically whsn ths vehicls starts to slids downhill in ths backward dir~c-tlon. This provides a pnsitiue stop since the wedge shaped member is driven into the ground under the w~ight of the vehicls, Although ths invention has bsen disclosed with rafsrenc~
to prsferrsd ernbodiments~ it is to bs understood that the invsntion is not limited to such embodiment6 and that alternatius arrangsrnents ars also envisaged. For example, ~nly one ground sngaging dsvice may be provided when it is de~med to bs suP~icisnt to stop oackward movsment af ths vshicle ,~
on a slippery surface. Furthermore, the ground engaging portion of the brake may be providsd with a pointsd end instead of a wedgs as illustrated in the preferred embodiments. Moraov~r~ a c~unterwaight can be ~ixed to ' , - .
F$gures 4 illustrat~3 a suitabla control sy~tam for oper~ting th~ ground-~ngsging membar of Fi.gure~ 1 to 3. Air originating f rom a convantional brake valve 40 and going to the brskes by br~ke lin~.3 42 i8 fad to cylind~r 34 through an elaotrl~ valve 44 which ie cont~ollsd by a switoh 46 scce~ibIe ta tha truek drivet. ~rak~ valve 40 i~
.
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."'' ' :
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`
~ . -- 3& --., ~ ~, ,. ~
.;
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prnvid~d with th~ conv~ntional r~39ular air supply 43D an ~merg~ncy supply 45 and stor~d in a reservoir 48.
Fi~ur~ 5 illustrates another smbodiment of the inuention mounted on ~he regula~ rear axle 50 of a truck. The ground engagillg devica compris~s a hollow member 52 pivotally mounted at 53 on a bracket 54 secured to the axlc and a w~dge shapsd msmber 55 i9 adjustably mounted ~;
in hollow member S2 by means of pin 56. In th0 ground engaging position, tha upper part of hollow member 52 bears against ths axle 50 and a ;
rubber pad 57 is provided for absorbing the shockO The groun~ engaging device i.5 operated by an air or hydraulic cylinder 58 through arms 60 and 62. In the retractsd position~ th~ ground engaging device rests ; against the axlP 50 as illustratsd in dashed lines~
The abovs disclosed brake operatss as follows: ~
`~ In the r~tracted position, ths ground sngaging device i5 . . .
, .
maintained in the upper position by a spring 59 in the air cylindsr 58.
It can be locked in retracted position by a locking pin extending through alignsd holes 64 and oo of membsr 52 and bracket ~4 rsspectivsly. When the uehicle is stopped on a ~lippsry surface, the air or hydraulio cylinder may be opsratsd to rotate the ground engaging device intD a ground sngaglng position. As soon as it touches ground, ths w~dge shaped snd ~}` of the ground engaging deuice is drivsn into ths ground automatically whsn ths vehicls starts to slids downhill in ths backward dir~c-tlon. This provides a pnsitiue stop since the wedge shaped member is driven into the ground under the w~ight of the vehicls, Although ths invention has bsen disclosed with rafsrenc~
to prsferrsd ernbodiments~ it is to bs understood that the invsntion is not limited to such embodiment6 and that alternatius arrangsrnents ars also envisaged. For example, ~nly one ground sngaging dsvice may be provided when it is de~med to bs suP~icisnt to stop oackward movsment af ths vshicle ,~
on a slippery surface. Furthermore, the ground engaging portion of the brake may be providsd with a pointsd end instead of a wedgs as illustrated in the preferred embodiments. Moraov~r~ a c~unterwaight can be ~ixed to ' , - .
- 4 -- . - ; . ~ .:
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slee~/~ 20 to counterbalanc9 mamber9 26 and 28 and thus raduca ths ~orce rsquired for spring 39. Ths position of cylinder 34 can be ~hangedO
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slee~/~ 20 to counterbalanc9 mamber9 26 and 28 and thus raduca ths ~orce rsquired for spring 39. Ths position of cylinder 34 can be ~hangedO
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Claims (3)
- THE EMBODIMENTS OF THE INVENTION IN WHICH AN EXCLUSIVE PROPERTY
OR PRIVILEGE IS CLAIMED, ARE DEFINED AS FOLLOWS:
l. A brake for preventing a heavy vehicle from sliding downhill in the backward direction on a slippery surface, comprising:
at least one elongated straight ground-engaging member having its inner end pivotally mounted on the vehicle adjacent the rear wheels of the same for pivotal movement of said ground-engaging member in a vertical plans between a retracted elevated position clearing the ground and in which said ground-engaging member extends rearwardly of the vehicle from said one end, and a limit operative position in which the outer end of said ground-engaging member engages the ground, power means for pivoting said ground-engaging member from said retracted position towards said limit operative position, stop mean for preventing rotation of said ground-engaging member past said limit operative position, and sprin means for pivoting said ground-engaging member from said limit operative position to said retracted position, said ground-engaging member being made of two telescopically-engaged parts for length adjustment thereof, means to lock said two parts in an adjusted length, and said outer end of said ground-engaging member having a wedge-shape defining an end flat surface which is upwardly inclined towards the rear of said vehicle and which is inclined relative to said slippery surface when the ground-engaging member is in said limit operative position, said ground-engaging member, when in said limit operative position and when locked in adjusted length, extending only slightly below the plane defined by the lower surface of said wheels, whereby, upon backward movement of the vehicle, the ground-engaging member will be positively driven into the ground by the transfer of the vehicle weight thereon and so stop the backward movement of the vehicle. - 2. A brake as defined in claim 1, wherein said stop means comprise a cable interconnecting said ground-engaging member to the vehicle frame.
- 3. A brake as defined in claim 1, further including a bracket secured to the transverse axle of said rear wheels and on which said ground-engaging member is pivotally connected intermediate its ends, said stop means consisting of a shock-absorbing pad carried by said transverse axle and engageable with the upper portion of said ground-engaging member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA317,274A CA1104072A (en) | 1978-12-04 | 1978-12-04 | Ground engaging brake for heavy vehicles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA317,274A CA1104072A (en) | 1978-12-04 | 1978-12-04 | Ground engaging brake for heavy vehicles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1104072A true CA1104072A (en) | 1981-06-30 |
Family
ID=4113057
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA317,274A Expired CA1104072A (en) | 1978-12-04 | 1978-12-04 | Ground engaging brake for heavy vehicles |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1104072A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994003350A1 (en) * | 1992-08-08 | 1994-02-17 | Joo Hee Lee | Auxiliary brake system for automobile |
-
1978
- 1978-12-04 CA CA317,274A patent/CA1104072A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994003350A1 (en) * | 1992-08-08 | 1994-02-17 | Joo Hee Lee | Auxiliary brake system for automobile |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |