CA1115514A - Bulldozer blade mounting apparatus - Google Patents
Bulldozer blade mounting apparatusInfo
- Publication number
- CA1115514A CA1115514A CA312,910A CA312910A CA1115514A CA 1115514 A CA1115514 A CA 1115514A CA 312910 A CA312910 A CA 312910A CA 1115514 A CA1115514 A CA 1115514A
- Authority
- CA
- Canada
- Prior art keywords
- blade
- hydraulic jacks
- supporting rod
- mounting frame
- bracket means
- 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
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Abstract
ABSTRACT OF THE DISCLOSURE
A mounting apparatus for supporting a bulldozer blade on a vehicle comprising a mounting frame having side members with one ends pivotally connected to the vehicle and extending therefrom and an intermediate member connected between the other ends of the side members, a universal joint for connect-ing a central portion of the blade to the intermediate member, a pair of hydraulic jacks for angling the blade, each one of the jacks having one end pivotally connected to the mounting frame and the other end connectible to a side of the blade, first and second brackets fixedly secured to the intermediate member of the mounting frame and to the bulldozer blade, respectively, a tilting jack pivotally connected and extending therebetween to the first bracket and the back side of the blade, and a supporting rod pivotally interconnecting the first and the second brackets.
A mounting apparatus for supporting a bulldozer blade on a vehicle comprising a mounting frame having side members with one ends pivotally connected to the vehicle and extending therefrom and an intermediate member connected between the other ends of the side members, a universal joint for connect-ing a central portion of the blade to the intermediate member, a pair of hydraulic jacks for angling the blade, each one of the jacks having one end pivotally connected to the mounting frame and the other end connectible to a side of the blade, first and second brackets fixedly secured to the intermediate member of the mounting frame and to the bulldozer blade, respectively, a tilting jack pivotally connected and extending therebetween to the first bracket and the back side of the blade, and a supporting rod pivotally interconnecting the first and the second brackets.
Description
1~L15~
. . , !, . ~
ULLDOZER BLADE MOUNTING hPPA~ATUS
,' -' ''I I .
. I - BAC~G~OUND OF:THE INVENTION
1 ~ .
. ¦ This invention relates to.a bulldozer blade mounting . :~-apparatus for use in earth moving vehicles.
I It is generally ~nown to turn the blade mounted on .. I an earth ~oving vehicle about the vertlcal axis of a pivot .. :, . . ¦ shaft of the mounting fra~e thereof.thereby angling the lef~
jl and right ends of the blade in the longitudinal direction o !I the venicle or turn the blade about the horizontal axis of the -~
,~ pivot shaft of the mounting frame thereby tilting the left and .
- right hand ends of the blade in the vertical direction. An . apparatus for controllin~ the posture or displacement of such . blade is disclosed in U.S. Patent No. 3,631,930.
The apparatus disclosed in the above-mentioned paten~
; comprises a-blade connected at three points with a ~nounting !
frame by ~eans of universal spherical ioints and first and . second double-acting hydraulic jacks mounted on the left and righ~ sides of the v-ehicle~ and a third double-actlng hydraulic ii jack for holding the blade in.a stable condition, the arrange- ¦
20 il ~ent beincr made such that the angl;ng OL the blade can be controlled ~y extending or retracting said left and rigllt hand ¦
double-acting hydraulic jac~s in the opposite direction, ~hilst r .- 1 ' ~s5~ ~
. I . .
.. , ~
!'. thc tilting of the blade can be controlled by extendin~ or 1 retracting said third double-acting hydraulic jack.
¦ In the case of such appara~us~ the posture of ~he ¦~ blade can be de~ermined only by the ad~ustment of the length Il of the hydraulic cylinder so that if the llydraulic fluld - ! leaks from the left and rigllt hand double-act;ng ihydrauiic jacks and hydraulic pressure control valves thereor, the ¦ longitudinal posture of the blade cannot be held and *he blade will turn its face downwards whilst the load imposed on the ~ blade in the earth moving operation tends to turn the face of I the blade upward t]lus causing harmEul wear-down and abnorr,lal Il stresses in the connecting portion of the blade and the mount-!i ing frame, and also reducing the efIiciency of the exca~ating . blade of thrusting into the earth and sand as ~ell as the earth ;
and sand rolling up and moving efficiency thereof.
Furthe~, in SUCII apparatus, i~ and wllen the control ! `
circuit for the left and right hand double-acting hydraulic ~ ~-jac};s is out o order and tlle effect of tne hydraulic fluid ~, for l;eeplng the position of tne extensible and retractable 1 rod becomes unavailable, the desired posture of the blade ¦' cannot be maintained relative to the r.lountin frame thereof;
¦i in otner words, the posture or position of the blade will be out of control thereby damaging the connecting portion.
. I `. I , . - 2 - I ;~
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SUMMARY OF T~ INVENTION
. _ _ It is therefore an aspect of the present invention to provide an improved mounting apparatus for supporting a bulldozer blade on a vehicle.
Another aspect of the present invention is to provide a bulldozer blade mounting apparatus wherein the blade can be supported securely and the posture of the blade cannot be changed even if one of the hydraulic jacks for angling the blade becomes out of order.
In accordance with an aspect of the present invention, there is provided a mounting apparatus for supporting a bulldoæer blade on a vehicle comprising a mounting frame having side members, each with one end pivotally connected to said vehicle and extending therefrom, and an intermediate member interconnecting the other ends of each of said side members;
a universal joint for connecting a central portion of said blade to said intermediate member;
a pair of hydraulic jacks for angling said blade, each one of said jacks having one end pivotally connected to said mounting frame and the other end connectible to the side of said blade;
means for operating said pair of hydraulic jacks in opposition to each other for adjusting the angle of ;~
said blade; ~:
first bracket means fix~dly secured to the intermediate member of said mounting frame;
second bracket means fixedly secured to said bulldozer blade; :
a tilting jack pivotally connected to and extend-ing between said first bracket means and the back side ^
of said blade;
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a supporting rod pivotally interconnecting said first and second bracket means wherein the connecting portion of said second bracket means and said supporting rod being positioned adjacent to a vertical line passing through the center of said universal joint; and first and second ball joint means at opposite ends of said supporting rod for pivotally intexconnecting said supporting rod with said first and second bracket means, said hydraulic jacks being of double-acting type and rod-side chambers being connected with each other thereby maintaining the sum of the entire length of said pair of hydraulic jacks, including piston rods, constant.
The above and other aspects, features and advan-tages of the present invention will be readily apparent from the following description taken in conjunction with the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is a perspective view of a blade mounting apparatus according to the present invention;
Fig. 2 is a schematic perspective view showing the operation of the blade mounting apparatus of the present invention;
Fig. 3 is a schematic plan view of a blade mounting apparatus when the apparatus is in tilting operation;
Fig. 4 is a schematic view o~ a blade when the mount-.
., . ing appa~atus is in tilting operation;
~ .
', Fig. 5 is a schematic plan view of a ~lade mounting apparatus when the apparatus is in analing operation;
~. I
tj ~ig. 6 is similar to Fig. 4 but sho~ing the mounting apparatus being in angling operation; and ¦~ Fig. 7 is a hydraulic circuit for a blade mounting !l apparatus of the present invention. . :
. .
ll DETAILED ~ESCRIPTION O~ THE INVE~TION
! ! !
ii . The present in~ention will now be described in detail . below by way of example only with reference to the accompanying ~, drawings. ln the drawings, reference nu~eral 1 denotes a mount- I
;- ing frame comprising left and right hand side members 2 which I -are mounted on a vehicle body not shown through their pivots 3a.
Fi~edly secured to the side members 2 of the mounting frame 1 are bracXets 3 to which double-acting hydraulic jacks 4 are ,I connected. The operation of the double-actinn hydraulic jacks 4 .; can rise.~and fall the mounting frame 1 Reference numeral 5 indicates a blade ~-Thich is con-, nected tc the mounting frame 1 by means of a unlversal ball '. joint 6. Brackets 7 and 8 are fixedly secured to the rear '. face of the blade 5 on the left and right sides thereof. Further, ¦ double-acting hydraulic jacks 11 and 1~ are attached to the base ends of the above-mentioned bra~ckets 3 Dy means of ~all .
joints 9 and 10. The hydraulic jacks 11 and 12 have respective .
-~ ~.i31 55~ 1 - ! . , ~
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ro~s 13 and 14 lY]liCh are connected to tne brac~ets 7 and 8 by -i means of ball joints 15 and 16, respectively.
j, Fixedly secured to the central part of a cross ¦ member of the moun~ing frame 1 i5 a base bracke~ 17. Fixedly ¦ secured to the front part and the upper part of the base bracket are brackets 18 and 19. A hydraulic jack.20 for tilting ~1 ¦¦ the blade 5 is connected at its base end by a ball joint 21 to the brac~et 18~ the hydraulic jack 20 includes a rod 22 which is connected by a ball joint 24 to a brac~et 23 fixedly ¦ secured to the rear face of the blade 5. A bracket 25 is , rigidly secured to the central; upper part of the blade 5.
¦I One end of a supporting rod 26 is connected to the bracket 25 by means of a ball joint 27. The other end of the supporting j rod 26 is connected to the bracket 19 by means of a ball joint .
il ~
', 28. .
j The zonnection o the supporting rod 26 is made in :~;
i such a manner as to select an technically optimum position there-i~ of in the displacement of the blade in the direction of angllng I , ., and tilting. This will no~ be described belol~ with reference , :.
i 20 . to Figures 2 to 6. ¦
,~ By connecting the blade S to the mounting frame 1 by 1, means of the universal spherical ioint 6 and the hydraulic .
~ c~ cvQY6 : ~j jac~s 11 and 12, the blade can be moved in a ~e~-p~*~æ
¦! relative to the mounting frame 1.
I If an optional point Al is ta~en on the surace o~ the ~. 1. . . . !
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, bl~de S, the point A' can move along only one curve as the blade 5 is ~oved.
1 l i, ~ Next, if the lengths of the hydraulic jacks 11 and 12 j are set at Cl and C2, respectively~ and the lengths are changed ¦~ from Cl and C2 to Cl' and C2' so as to keep the sum of the . ¦ lengths of the hydIaulic jacks 11 and 12 or Cl ~ C2 constant, then the point A' ~ill move along only one curve in the similar manner.
.. ~ Then, i the.point A' is located at a point A near the vertical line passing througll the oscillation centre.B of .
the blade 5, the amount of movement of the point A at the time .
of angling i5 small relative to the support frame 1. Even if the lengths of the hydraulic jacks 11 and 12 are changed Erom Cl and ~2 to Cl' and C2', respectively, the point A will move I .:
: along the same curve relative to the support frame 1 as shown i~ Figures 5 and 6. ACCOTding1Y, even if a spontaneous point on the support frame 1 is directly connected to the point A
, near the vertical line passing through the oscillation centre ! ~
.
B of the blade 5 by the supporting rod 26, no excessive stress is created on the supporting rod 26. Also, the supporting rod , 26 is not forcibly twisted in the direction of tilting.
,. - In order to achieve smooth and satisfactory operation - ~; without causing excessive stresses in every component par~ at ¦ I
¦~ the time of angling and tilting of the blade 5 by attaching the ¦
,.supporting rod.26 between the blade 5 and the support frame 1, ~ 7 -.
i !
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,~
i,.is essential to ~perate the hydraulic jacks ll and 12 sr,loothly so as to balance their lengths. Such operation is made by a hy~Iaulic control circuit shown in Figure 7.
" ; In ~igure 7, the fluid under pressure delivered by a - ¦¦ hydraulic pump 40 can be selectively supplied by a blade angling ¦I control valve 41 into either a circuit 42 or a circuit 43. The . ¦ circuit 42 is connected to the bottom side of-the cylinder of ... ~ the hydraulic jack ll, whilest the circuit 43 is connected to I the bottom side of the hydraulic jack 12. The head sides of the l¦ cylinders of the hydraulic jacks 11 and 12 are interconnected by j a circuit 44 so as to communicate.with each other thereby .~ , eliminating return path to the hydraulic fluid reservoir and . ;.
.sealing the non-compressible fluid to enable the pressurized , .
1 fluid to communicate with both cylinders of hydraulic jacks 11 :-~
and 12. Therefore, when the pressurized fluid selectively sup-plied through either the circuit 42 or the CiTCUit 43 is fed . into one of the hydraulic jac~s so as to extend the rod thereby, the fluid sealed in the head side thereof is fed into the head - side of the other hydraulic jack 50 as to retract the rod of the latter and achieve angling of the blade 5. Therefore, the sum .,of the lengths of the left and right hand hydraulic jacks ll and ~12 can be.kept ConStBnt.
As mentioned hereinabove, the present invention com-~prises a suppoTt frame 1~ a blade 5 mounted on the support frame .l so that it can be pivotted longitudinally and horizontally~
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. . .
brackets 3,3 fixedly secured to the side members 2,2 of the support frame 1, said brackets 3,3 and the blade 5 being ' connected by hydraulic jacks 11 and 12, a bracket 25 mounted !' near the vertical line passing through the oscillation centre : I B of said blade 5, a bracket 19 mounted on the support frame 1 ¦ opposite to said brac~et 25, said bracke~s l9 and 25 being pivotally connected by a supporting rod 26, and a tilting ¦ hydraulic jacks 20 connected between the blade 5 and the suppor~
I frame 1 or controlling the tilting of the blade 5.
10 I Therefore, the blade 5 can be held securely by the support frame 1 and no excessive stress is created in every component part when the blade 5 is moved.
! Further, the longitudinal posture of the blade 5remains unchanged even if a trouble occurs in the left and ~~
right nand hydraulic jacks 11 and 12, and therefore the apparatus, will not run into dangerous condition.
Further, the apparatus itself can absorb the displace- !:
"
nlent three-dimensionally which is caused by *he operation and ;
also ~he structure can be subs~antially simplified as compared l ,;
! with ~he conventional supporting apparatus which can absorb the displacement of the blade two-dimensionally. Iioreover, ,I the posture of the blade 5 in the longitudinal direction is ¦~
¦ maintained at four points, and so the rigidity of the appara-i~ tus can be ~uch improYed.
hile the invention has bëen described and shown with ., 1 ,.
.. ~
~ _ i.
.
11155 ~4 -- "
I, particular reference to the preferred embodiment, it will be ¦, apparent that ~ariations might be possible that would fall within the scope o~ the present invention, whlcll is not . j, intended to be limited except as deflned in the o11o~ing : claims.
. ' ' ', , .
1.' . I
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. - 10-' . . 11 .
. , , i ; .
. . , !, . ~
ULLDOZER BLADE MOUNTING hPPA~ATUS
,' -' ''I I .
. I - BAC~G~OUND OF:THE INVENTION
1 ~ .
. ¦ This invention relates to.a bulldozer blade mounting . :~-apparatus for use in earth moving vehicles.
I It is generally ~nown to turn the blade mounted on .. I an earth ~oving vehicle about the vertlcal axis of a pivot .. :, . . ¦ shaft of the mounting fra~e thereof.thereby angling the lef~
jl and right ends of the blade in the longitudinal direction o !I the venicle or turn the blade about the horizontal axis of the -~
,~ pivot shaft of the mounting frame thereby tilting the left and .
- right hand ends of the blade in the vertical direction. An . apparatus for controllin~ the posture or displacement of such . blade is disclosed in U.S. Patent No. 3,631,930.
The apparatus disclosed in the above-mentioned paten~
; comprises a-blade connected at three points with a ~nounting !
frame by ~eans of universal spherical ioints and first and . second double-acting hydraulic jacks mounted on the left and righ~ sides of the v-ehicle~ and a third double-actlng hydraulic ii jack for holding the blade in.a stable condition, the arrange- ¦
20 il ~ent beincr made such that the angl;ng OL the blade can be controlled ~y extending or retracting said left and rigllt hand ¦
double-acting hydraulic jac~s in the opposite direction, ~hilst r .- 1 ' ~s5~ ~
. I . .
.. , ~
!'. thc tilting of the blade can be controlled by extendin~ or 1 retracting said third double-acting hydraulic jack.
¦ In the case of such appara~us~ the posture of ~he ¦~ blade can be de~ermined only by the ad~ustment of the length Il of the hydraulic cylinder so that if the llydraulic fluld - ! leaks from the left and rigllt hand double-act;ng ihydrauiic jacks and hydraulic pressure control valves thereor, the ¦ longitudinal posture of the blade cannot be held and *he blade will turn its face downwards whilst the load imposed on the ~ blade in the earth moving operation tends to turn the face of I the blade upward t]lus causing harmEul wear-down and abnorr,lal Il stresses in the connecting portion of the blade and the mount-!i ing frame, and also reducing the efIiciency of the exca~ating . blade of thrusting into the earth and sand as ~ell as the earth ;
and sand rolling up and moving efficiency thereof.
Furthe~, in SUCII apparatus, i~ and wllen the control ! `
circuit for the left and right hand double-acting hydraulic ~ ~-jac};s is out o order and tlle effect of tne hydraulic fluid ~, for l;eeplng the position of tne extensible and retractable 1 rod becomes unavailable, the desired posture of the blade ¦' cannot be maintained relative to the r.lountin frame thereof;
¦i in otner words, the posture or position of the blade will be out of control thereby damaging the connecting portion.
. I `. I , . - 2 - I ;~
,. ~
.: ' ~1~5S~
SUMMARY OF T~ INVENTION
. _ _ It is therefore an aspect of the present invention to provide an improved mounting apparatus for supporting a bulldozer blade on a vehicle.
Another aspect of the present invention is to provide a bulldozer blade mounting apparatus wherein the blade can be supported securely and the posture of the blade cannot be changed even if one of the hydraulic jacks for angling the blade becomes out of order.
In accordance with an aspect of the present invention, there is provided a mounting apparatus for supporting a bulldoæer blade on a vehicle comprising a mounting frame having side members, each with one end pivotally connected to said vehicle and extending therefrom, and an intermediate member interconnecting the other ends of each of said side members;
a universal joint for connecting a central portion of said blade to said intermediate member;
a pair of hydraulic jacks for angling said blade, each one of said jacks having one end pivotally connected to said mounting frame and the other end connectible to the side of said blade;
means for operating said pair of hydraulic jacks in opposition to each other for adjusting the angle of ;~
said blade; ~:
first bracket means fix~dly secured to the intermediate member of said mounting frame;
second bracket means fixedly secured to said bulldozer blade; :
a tilting jack pivotally connected to and extend-ing between said first bracket means and the back side ^
of said blade;
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a supporting rod pivotally interconnecting said first and second bracket means wherein the connecting portion of said second bracket means and said supporting rod being positioned adjacent to a vertical line passing through the center of said universal joint; and first and second ball joint means at opposite ends of said supporting rod for pivotally intexconnecting said supporting rod with said first and second bracket means, said hydraulic jacks being of double-acting type and rod-side chambers being connected with each other thereby maintaining the sum of the entire length of said pair of hydraulic jacks, including piston rods, constant.
The above and other aspects, features and advan-tages of the present invention will be readily apparent from the following description taken in conjunction with the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is a perspective view of a blade mounting apparatus according to the present invention;
Fig. 2 is a schematic perspective view showing the operation of the blade mounting apparatus of the present invention;
Fig. 3 is a schematic plan view of a blade mounting apparatus when the apparatus is in tilting operation;
Fig. 4 is a schematic view o~ a blade when the mount-.
., . ing appa~atus is in tilting operation;
~ .
', Fig. 5 is a schematic plan view of a ~lade mounting apparatus when the apparatus is in analing operation;
~. I
tj ~ig. 6 is similar to Fig. 4 but sho~ing the mounting apparatus being in angling operation; and ¦~ Fig. 7 is a hydraulic circuit for a blade mounting !l apparatus of the present invention. . :
. .
ll DETAILED ~ESCRIPTION O~ THE INVE~TION
! ! !
ii . The present in~ention will now be described in detail . below by way of example only with reference to the accompanying ~, drawings. ln the drawings, reference nu~eral 1 denotes a mount- I
;- ing frame comprising left and right hand side members 2 which I -are mounted on a vehicle body not shown through their pivots 3a.
Fi~edly secured to the side members 2 of the mounting frame 1 are bracXets 3 to which double-acting hydraulic jacks 4 are ,I connected. The operation of the double-actinn hydraulic jacks 4 .; can rise.~and fall the mounting frame 1 Reference numeral 5 indicates a blade ~-Thich is con-, nected tc the mounting frame 1 by means of a unlversal ball '. joint 6. Brackets 7 and 8 are fixedly secured to the rear '. face of the blade 5 on the left and right sides thereof. Further, ¦ double-acting hydraulic jacks 11 and 1~ are attached to the base ends of the above-mentioned bra~ckets 3 Dy means of ~all .
joints 9 and 10. The hydraulic jacks 11 and 12 have respective .
-~ ~.i31 55~ 1 - ! . , ~
'1~
ro~s 13 and 14 lY]liCh are connected to tne brac~ets 7 and 8 by -i means of ball joints 15 and 16, respectively.
j, Fixedly secured to the central part of a cross ¦ member of the moun~ing frame 1 i5 a base bracke~ 17. Fixedly ¦ secured to the front part and the upper part of the base bracket are brackets 18 and 19. A hydraulic jack.20 for tilting ~1 ¦¦ the blade 5 is connected at its base end by a ball joint 21 to the brac~et 18~ the hydraulic jack 20 includes a rod 22 which is connected by a ball joint 24 to a brac~et 23 fixedly ¦ secured to the rear face of the blade 5. A bracket 25 is , rigidly secured to the central; upper part of the blade 5.
¦I One end of a supporting rod 26 is connected to the bracket 25 by means of a ball joint 27. The other end of the supporting j rod 26 is connected to the bracket 19 by means of a ball joint .
il ~
', 28. .
j The zonnection o the supporting rod 26 is made in :~;
i such a manner as to select an technically optimum position there-i~ of in the displacement of the blade in the direction of angllng I , ., and tilting. This will no~ be described belol~ with reference , :.
i 20 . to Figures 2 to 6. ¦
,~ By connecting the blade S to the mounting frame 1 by 1, means of the universal spherical ioint 6 and the hydraulic .
~ c~ cvQY6 : ~j jac~s 11 and 12, the blade can be moved in a ~e~-p~*~æ
¦! relative to the mounting frame 1.
I If an optional point Al is ta~en on the surace o~ the ~. 1. . . . !
.. ... , . I
, .
Ij ' :
~ 1 1 lSS~4 `
, ' .
' .' ' I :
, bl~de S, the point A' can move along only one curve as the blade 5 is ~oved.
1 l i, ~ Next, if the lengths of the hydraulic jacks 11 and 12 j are set at Cl and C2, respectively~ and the lengths are changed ¦~ from Cl and C2 to Cl' and C2' so as to keep the sum of the . ¦ lengths of the hydIaulic jacks 11 and 12 or Cl ~ C2 constant, then the point A' ~ill move along only one curve in the similar manner.
.. ~ Then, i the.point A' is located at a point A near the vertical line passing througll the oscillation centre.B of .
the blade 5, the amount of movement of the point A at the time .
of angling i5 small relative to the support frame 1. Even if the lengths of the hydraulic jacks 11 and 12 are changed Erom Cl and ~2 to Cl' and C2', respectively, the point A will move I .:
: along the same curve relative to the support frame 1 as shown i~ Figures 5 and 6. ACCOTding1Y, even if a spontaneous point on the support frame 1 is directly connected to the point A
, near the vertical line passing through the oscillation centre ! ~
.
B of the blade 5 by the supporting rod 26, no excessive stress is created on the supporting rod 26. Also, the supporting rod , 26 is not forcibly twisted in the direction of tilting.
,. - In order to achieve smooth and satisfactory operation - ~; without causing excessive stresses in every component par~ at ¦ I
¦~ the time of angling and tilting of the blade 5 by attaching the ¦
,.supporting rod.26 between the blade 5 and the support frame 1, ~ 7 -.
i !
~ss~4 .,., , I
.. . I
,~
i,.is essential to ~perate the hydraulic jacks ll and 12 sr,loothly so as to balance their lengths. Such operation is made by a hy~Iaulic control circuit shown in Figure 7.
" ; In ~igure 7, the fluid under pressure delivered by a - ¦¦ hydraulic pump 40 can be selectively supplied by a blade angling ¦I control valve 41 into either a circuit 42 or a circuit 43. The . ¦ circuit 42 is connected to the bottom side of-the cylinder of ... ~ the hydraulic jack ll, whilest the circuit 43 is connected to I the bottom side of the hydraulic jack 12. The head sides of the l¦ cylinders of the hydraulic jacks 11 and 12 are interconnected by j a circuit 44 so as to communicate.with each other thereby .~ , eliminating return path to the hydraulic fluid reservoir and . ;.
.sealing the non-compressible fluid to enable the pressurized , .
1 fluid to communicate with both cylinders of hydraulic jacks 11 :-~
and 12. Therefore, when the pressurized fluid selectively sup-plied through either the circuit 42 or the CiTCUit 43 is fed . into one of the hydraulic jac~s so as to extend the rod thereby, the fluid sealed in the head side thereof is fed into the head - side of the other hydraulic jack 50 as to retract the rod of the latter and achieve angling of the blade 5. Therefore, the sum .,of the lengths of the left and right hand hydraulic jacks ll and ~12 can be.kept ConStBnt.
As mentioned hereinabove, the present invention com-~prises a suppoTt frame 1~ a blade 5 mounted on the support frame .l so that it can be pivotted longitudinally and horizontally~
!
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.
, ~ 5514~
. . .
brackets 3,3 fixedly secured to the side members 2,2 of the support frame 1, said brackets 3,3 and the blade 5 being ' connected by hydraulic jacks 11 and 12, a bracket 25 mounted !' near the vertical line passing through the oscillation centre : I B of said blade 5, a bracket 19 mounted on the support frame 1 ¦ opposite to said brac~et 25, said bracke~s l9 and 25 being pivotally connected by a supporting rod 26, and a tilting ¦ hydraulic jacks 20 connected between the blade 5 and the suppor~
I frame 1 or controlling the tilting of the blade 5.
10 I Therefore, the blade 5 can be held securely by the support frame 1 and no excessive stress is created in every component part when the blade 5 is moved.
! Further, the longitudinal posture of the blade 5remains unchanged even if a trouble occurs in the left and ~~
right nand hydraulic jacks 11 and 12, and therefore the apparatus, will not run into dangerous condition.
Further, the apparatus itself can absorb the displace- !:
"
nlent three-dimensionally which is caused by *he operation and ;
also ~he structure can be subs~antially simplified as compared l ,;
! with ~he conventional supporting apparatus which can absorb the displacement of the blade two-dimensionally. Iioreover, ,I the posture of the blade 5 in the longitudinal direction is ¦~
¦ maintained at four points, and so the rigidity of the appara-i~ tus can be ~uch improYed.
hile the invention has bëen described and shown with ., 1 ,.
.. ~
~ _ i.
.
11155 ~4 -- "
I, particular reference to the preferred embodiment, it will be ¦, apparent that ~ariations might be possible that would fall within the scope o~ the present invention, whlcll is not . j, intended to be limited except as deflned in the o11o~ing : claims.
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Claims
1. A mounting apparatus for supporting a bulldozer blade on a vehicle comprising a mounting frame having side members, each with one end pivotally connected to said vehicle and extending therefrom, and an intermediate member interconnecting the other ends of each of said side members;
a universal joint for connecting a central portion of said blade to said intermediate member;
a pair of hydraulic jacks for angling said blade, each one of said jacks having one end pivotally connected to said mounting frame and the other end connectible to the side of said blade;
means for operating said pair of hydraulic jacks in opposition to each other for adjusting the angle of said blade;
first bracket means fixedly secured to the intermediate member of said mounting frame;
second bracket means fixedly secured to said bulldozer blade;
a tilting jack pivotally connected to and extend ing between said first bracket means and the back side of said blade;
a supporting rod pivotally interconnecting said first and second bracket means wherein the connecting portion of said second bracket means and said supporting rod being positioned adjacent to a vertical line passing through the center of said universal joint; and first and second ball joint means at opposite ends of said supporting rod for pivotally interconnecting said supporting rod with said first and second bracket means, said hydraulic jacks being of double-acting type and rod-side chambers being connected with each other thereby maintaining the sum of the entire length of said pair of hydraulic jacks, including piston rods, constant.
a universal joint for connecting a central portion of said blade to said intermediate member;
a pair of hydraulic jacks for angling said blade, each one of said jacks having one end pivotally connected to said mounting frame and the other end connectible to the side of said blade;
means for operating said pair of hydraulic jacks in opposition to each other for adjusting the angle of said blade;
first bracket means fixedly secured to the intermediate member of said mounting frame;
second bracket means fixedly secured to said bulldozer blade;
a tilting jack pivotally connected to and extend ing between said first bracket means and the back side of said blade;
a supporting rod pivotally interconnecting said first and second bracket means wherein the connecting portion of said second bracket means and said supporting rod being positioned adjacent to a vertical line passing through the center of said universal joint; and first and second ball joint means at opposite ends of said supporting rod for pivotally interconnecting said supporting rod with said first and second bracket means, said hydraulic jacks being of double-acting type and rod-side chambers being connected with each other thereby maintaining the sum of the entire length of said pair of hydraulic jacks, including piston rods, constant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA312,910A CA1115514A (en) | 1978-10-06 | 1978-10-06 | Bulldozer blade mounting apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA312,910A CA1115514A (en) | 1978-10-06 | 1978-10-06 | Bulldozer blade mounting apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1115514A true CA1115514A (en) | 1982-01-05 |
Family
ID=4112562
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA312,910A Expired CA1115514A (en) | 1978-10-06 | 1978-10-06 | Bulldozer blade mounting apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1115514A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4562891A (en) * | 1982-07-30 | 1986-01-07 | Bomadier-Rotax-Wien Produktions- und Vertriebsgesellschaft mbH | Front vehicle blade mount |
| US4638869A (en) * | 1986-04-14 | 1987-01-27 | Caterpillar Inc. | Bulldozer blade mounting and stabilizing arrangement |
| US4962816A (en) * | 1986-10-22 | 1990-10-16 | Kabushiki Kaisha Komatsu Seisakusho | Arrangement for controlling bulldozer blade |
| US5634523A (en) * | 1993-06-29 | 1997-06-03 | Kabushiki Kaisha Komatsu Seisakusho | Blade device |
| GR1009086B (en) * | 2016-04-12 | 2017-08-11 | Γεωργιος Βασιλειου Μπαλαμπανης | Machine for the traction and propelling of materials |
-
1978
- 1978-10-06 CA CA312,910A patent/CA1115514A/en not_active Expired
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4562891A (en) * | 1982-07-30 | 1986-01-07 | Bomadier-Rotax-Wien Produktions- und Vertriebsgesellschaft mbH | Front vehicle blade mount |
| US4638869A (en) * | 1986-04-14 | 1987-01-27 | Caterpillar Inc. | Bulldozer blade mounting and stabilizing arrangement |
| WO1987006288A1 (en) * | 1986-04-14 | 1987-10-22 | Caterpillar Inc. | Bulldozer blade mounting and stabilizing arrangement |
| US4962816A (en) * | 1986-10-22 | 1990-10-16 | Kabushiki Kaisha Komatsu Seisakusho | Arrangement for controlling bulldozer blade |
| US5634523A (en) * | 1993-06-29 | 1997-06-03 | Kabushiki Kaisha Komatsu Seisakusho | Blade device |
| GR1009086B (en) * | 2016-04-12 | 2017-08-11 | Γεωργιος Βασιλειου Μπαλαμπανης | Machine for the traction and propelling of materials |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |