CA1173238A - Blades for earth moving machines - Google Patents
Blades for earth moving machinesInfo
- Publication number
- CA1173238A CA1173238A CA000379329A CA379329A CA1173238A CA 1173238 A CA1173238 A CA 1173238A CA 000379329 A CA000379329 A CA 000379329A CA 379329 A CA379329 A CA 379329A CA 1173238 A CA1173238 A CA 1173238A
- Authority
- CA
- Canada
- Prior art keywords
- cutting edge
- male
- female
- edge member
- members
- 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
- 230000000295 complement effect Effects 0.000 claims description 7
- 238000010276 construction Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
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- Road Repair (AREA)
Abstract
A B S T R A C T
Disclosed is a cutting edge member, for a scraper blade, having a body part and means for interlocking with adjacent cutting edge members when securely mounted in position on a scraper blade. The interlocking and mounting is in such manner that the cutting edge member may be adjusted and/or reversed in position relative to the adjacent edge member or members.
Disclosed is a cutting edge member, for a scraper blade, having a body part and means for interlocking with adjacent cutting edge members when securely mounted in position on a scraper blade. The interlocking and mounting is in such manner that the cutting edge member may be adjusted and/or reversed in position relative to the adjacent edge member or members.
Description
~ ~73238 IMPROVEMENTS IN BLADES FOR EARTH MOVING M~CHINES
B.AC~GROU~D OF TKE INVE~TION
l. Field of the Invention This invention relates to improvements in blades for earth moving machines such as scrapers, graders, bull-dozers and so on (hereinafter referred to as "scrapers") and it refers particularl~ to the cutting edges - the operative cutting edge portions of the blades.
B.AC~GROU~D OF TKE INVE~TION
l. Field of the Invention This invention relates to improvements in blades for earth moving machines such as scrapers, graders, bull-dozers and so on (hereinafter referred to as "scrapers") and it refers particularl~ to the cutting edges - the operative cutting edge portions of the blades.
2. Description of the Prior Art The ground-enOaging tools of bulldozers, scrapers~
graders and other earth moving machines are made in a wide variety of types, according to the purposes for which the tools are to be used. In general, there are replaceable edge members capable of being bolted in position on a support asseubly, such as a scraper blade, and those edge members may be made to suit a level cut arrangement (with the front edges of the several members all in line), in a drop centre or stinger arrange~ent (when the mlddle part projects forwardly of the two side par-ts), with integral forwardly-projecting teeth, with replaceable forwardly projecting teeth, substantially planar in shape to suit scrapers, curved to suit graders, with front and rear edges so that they may be reversed, and so on. The edge members for a machine ma~ be made in one piece to extend the full ~idth of the tools to which they are to be attached or they may be made in shorter sections so that three, ~our or more members are bolted iu positioQ on a support member ~ ~7323~
to maXe up tne full width of the earth-engaging tool.
OBJECT~ OF ~E~E INVE~ION
__ __ This invention is applicable to all such ed~e membe s but for simplicity of description they will be re.erred to as cutting edges or edge members for scraper blades without limiting the invent~on to the blades of such machines.
This invention nas been devised particularl~ with ~he object of providing a construction o~ cutting ~dge for a scraper blade such that the range of use of the cutting edge will be greatly increased. Another object is to provide cutting edges so constructed that the~ may be rever~ed in position, interchanged, and/or used in the straight or level-cut operational position or in the so-called "drop" or "stinger" position, as required. A further object is to provide cutting edges which will be easy to replace and/or adjust in position.
Yet another object is to provide a cutting edge of such construction that a broken or worn part of ths clltting edge ma~ be replaced withou-t the necessity of replacing the whole cut~ing edge.
BRIEF SUM~RY OF T~E I~VENTION
~he invention devised with these and o-ther objects in view ~rovides cutting edge me~bers for scraper blades havi~g means for interlocking with adjacent cutting edges whereby each cutting edge~ when securely mounted in position on a scraper blade~ will be engaged with the adjacent cutting edge o~ edges, the cutting edge members being adjustable and 323a reversible in position one relative to the other.
The invention in one broad aspect comprehends a pair of cutting eage members adapted to be fastened to a blade-like support member oE an earth moving machine. The pair comprises a female cutting edge member and a male cuttiny edge member, each member having ground-engaging edges at its opposite ends. The female cutting edge member has on at least one of its opposite side edges female interlocking means for engagement by complemen-tary means on the male eutting edge member and the male cutting edge member has on at least one of its opposite side edges male interlocking means for interlockiny engagement with the female interlocking means of the female cutting edge member.
The female and male interlocking means are so arranged that one cutting edge member may be adjusted linearly in position on the support member of the earth moving machine relatlve to the adjacent at least one cutting edge member and may also be reversed in position end-for-end and interlocked again wi-th that adjacent cuttinc~ edge member so as to be adap-ted ~o be fastened again to the suppor-t member of the earth moving machine.
Another aspect of the inven-tion comprehends a pair of cutting edye members adapted to be ~astened -to a blade~like support member of an earth moving machine, the pair including a female cutting edge member and a male cutting edge member. Each member has ground-engaging edges at its opposite ends, the female cutting edge member having along its opposing side edges female interlocking means with complementary male interlocking means belng along opposing side edges of the male cutting edge member. The female and male interlocking means are so arranged that each of the cutting edge members may be adjusted linearly :~ 173~3~3 in position on the support memher of the earth moving machine relative to the other cutting edge member and may also be reversed in position end-for-end and interlocked again with that other cuttiny edge member so as to be adapted to be fastened again to the support member of the earth moving machine.
It is preferred that the means for lnterlocking be dovetailed parts, preferably tapered, on the opposite side edges of the cutting edge members so arranged that when two such cutting edge rnembers are mounted on a scraper blade in side-by-side relationship the dovetailed parts on one side of one such cutting edge member will interengage with those on the adjacent side of the next cutting edge member. It is also preferred that each of the cutting edge members be provided with two fastening holes by which it may be fastened to the scraper blade, and -that the dovetailed parts have the same linear spacing as said holes so that if a cutting edge member be moved, relative to an adjacent cu-tting edge member, the dovetailed parts will still interengage so as to lock toyether the two said cutting edge members.
Preferably, the dovetailed parts on one cutti.ng edge member are tapered downwardly and inwardly, so that they are wider at the top than at the bottom, thus providing a male cuttiny edge member, and the dovetalled parts of the next adjacen-t cutting edge members are tapered in the opposite direction, so that they are wider at the bottom than a-t -the top, the recesses between said dovetail parts being the same shape as the dovetail parts of the first-mentioned cutting edge member, the second said cutting edge member being the female member. Thus, the cutting edge members will be 23a adapted to interlock in the longitudinal direction and transverse directions, and in the vertical direction as well - considering the cutting edge members as being horizontal.
Thus, there will be two different cutting edge members9 o~e having the dovetailed members tapered in one direction and the other having the dovetailed members tapered in the opposite direction.
In order to provide for a reversal of each cutting edge member so that, when one end is worn, it may be tur~ed end-for-end and an unworn edge put into operational position, each end is shaped to provide a desired "edge" and the dove-tailed parts of the two different cutting edge members will be arranged so that they will interengage even when one of them is reversed in position relative to the other without any change in related position of the fastening holes~
Also, the spacing of the do~etailed par~s in relation to the spacing of the faste~ing holes is such that one cutting edge member may be moved longitudi~ally relative to the adjacent members into a drop centre or stinger position, and be bolted in that position.
In order that the inve~tio~ may be readily understood and conveniently put into practical ~orm we shall ~ow describe with reference to the accompany-ng illustrative dra~ings on~
exe~plary co~struction of cutting edges for earth moving machines~ and a modification thereof.
~ 1~323~
~ig. l is a plan view o~ a pair o~ male and fe~ale members in intere~gaged relationship;
~ig. 2 shows a transverse cross-sectio~ o~ the line and in the direction of the arrows 2-2 of Fig. l;
Fig. 3 and ~ig. 4 are side elevations of the male and female members, respectively, in the direotions of the arro~s
graders and other earth moving machines are made in a wide variety of types, according to the purposes for which the tools are to be used. In general, there are replaceable edge members capable of being bolted in position on a support asseubly, such as a scraper blade, and those edge members may be made to suit a level cut arrangement (with the front edges of the several members all in line), in a drop centre or stinger arrange~ent (when the mlddle part projects forwardly of the two side par-ts), with integral forwardly-projecting teeth, with replaceable forwardly projecting teeth, substantially planar in shape to suit scrapers, curved to suit graders, with front and rear edges so that they may be reversed, and so on. The edge members for a machine ma~ be made in one piece to extend the full ~idth of the tools to which they are to be attached or they may be made in shorter sections so that three, ~our or more members are bolted iu positioQ on a support member ~ ~7323~
to maXe up tne full width of the earth-engaging tool.
OBJECT~ OF ~E~E INVE~ION
__ __ This invention is applicable to all such ed~e membe s but for simplicity of description they will be re.erred to as cutting edges or edge members for scraper blades without limiting the invent~on to the blades of such machines.
This invention nas been devised particularl~ with ~he object of providing a construction o~ cutting ~dge for a scraper blade such that the range of use of the cutting edge will be greatly increased. Another object is to provide cutting edges so constructed that the~ may be rever~ed in position, interchanged, and/or used in the straight or level-cut operational position or in the so-called "drop" or "stinger" position, as required. A further object is to provide cutting edges which will be easy to replace and/or adjust in position.
Yet another object is to provide a cutting edge of such construction that a broken or worn part of ths clltting edge ma~ be replaced withou-t the necessity of replacing the whole cut~ing edge.
BRIEF SUM~RY OF T~E I~VENTION
~he invention devised with these and o-ther objects in view ~rovides cutting edge me~bers for scraper blades havi~g means for interlocking with adjacent cutting edges whereby each cutting edge~ when securely mounted in position on a scraper blade~ will be engaged with the adjacent cutting edge o~ edges, the cutting edge members being adjustable and 323a reversible in position one relative to the other.
The invention in one broad aspect comprehends a pair of cutting eage members adapted to be fastened to a blade-like support member oE an earth moving machine. The pair comprises a female cutting edge member and a male cuttiny edge member, each member having ground-engaging edges at its opposite ends. The female cutting edge member has on at least one of its opposite side edges female interlocking means for engagement by complemen-tary means on the male eutting edge member and the male cutting edge member has on at least one of its opposite side edges male interlocking means for interlockiny engagement with the female interlocking means of the female cutting edge member.
The female and male interlocking means are so arranged that one cutting edge member may be adjusted linearly in position on the support member of the earth moving machine relatlve to the adjacent at least one cutting edge member and may also be reversed in position end-for-end and interlocked again wi-th that adjacent cuttinc~ edge member so as to be adap-ted ~o be fastened again to the suppor-t member of the earth moving machine.
Another aspect of the inven-tion comprehends a pair of cutting edye members adapted to be ~astened -to a blade~like support member of an earth moving machine, the pair including a female cutting edge member and a male cutting edge member. Each member has ground-engaging edges at its opposite ends, the female cutting edge member having along its opposing side edges female interlocking means with complementary male interlocking means belng along opposing side edges of the male cutting edge member. The female and male interlocking means are so arranged that each of the cutting edge members may be adjusted linearly :~ 173~3~3 in position on the support memher of the earth moving machine relative to the other cutting edge member and may also be reversed in position end-for-end and interlocked again with that other cuttiny edge member so as to be adapted to be fastened again to the support member of the earth moving machine.
It is preferred that the means for lnterlocking be dovetailed parts, preferably tapered, on the opposite side edges of the cutting edge members so arranged that when two such cutting edge rnembers are mounted on a scraper blade in side-by-side relationship the dovetailed parts on one side of one such cutting edge member will interengage with those on the adjacent side of the next cutting edge member. It is also preferred that each of the cutting edge members be provided with two fastening holes by which it may be fastened to the scraper blade, and -that the dovetailed parts have the same linear spacing as said holes so that if a cutting edge member be moved, relative to an adjacent cu-tting edge member, the dovetailed parts will still interengage so as to lock toyether the two said cutting edge members.
Preferably, the dovetailed parts on one cutti.ng edge member are tapered downwardly and inwardly, so that they are wider at the top than at the bottom, thus providing a male cuttiny edge member, and the dovetalled parts of the next adjacen-t cutting edge members are tapered in the opposite direction, so that they are wider at the bottom than a-t -the top, the recesses between said dovetail parts being the same shape as the dovetail parts of the first-mentioned cutting edge member, the second said cutting edge member being the female member. Thus, the cutting edge members will be 23a adapted to interlock in the longitudinal direction and transverse directions, and in the vertical direction as well - considering the cutting edge members as being horizontal.
Thus, there will be two different cutting edge members9 o~e having the dovetailed members tapered in one direction and the other having the dovetailed members tapered in the opposite direction.
In order to provide for a reversal of each cutting edge member so that, when one end is worn, it may be tur~ed end-for-end and an unworn edge put into operational position, each end is shaped to provide a desired "edge" and the dove-tailed parts of the two different cutting edge members will be arranged so that they will interengage even when one of them is reversed in position relative to the other without any change in related position of the fastening holes~
Also, the spacing of the do~etailed par~s in relation to the spacing of the faste~ing holes is such that one cutting edge member may be moved longitudi~ally relative to the adjacent members into a drop centre or stinger position, and be bolted in that position.
In order that the inve~tio~ may be readily understood and conveniently put into practical ~orm we shall ~ow describe with reference to the accompany-ng illustrative dra~ings on~
exe~plary co~struction of cutting edges for earth moving machines~ and a modification thereof.
~ 1~323~
~ig. l is a plan view o~ a pair o~ male and fe~ale members in intere~gaged relationship;
~ig. 2 shows a transverse cross-sectio~ o~ the line and in the direction of the arrows 2-2 of Fig. l;
Fig. 3 and ~ig. 4 are side elevations of the male and female members, respectively, in the direotions of the arro~s
3 and 4 adjacent Fig. l;
Fig. 5 is a perspective view of the female member;
Fig. 6 shows a plan view of the male and female members in adjusted relative positions; and Fig. 7 is a perspective view of a modified co~struction.
DE~AI~ED DESCRIP~IO~ OF ~EE DRAWINGS
.
According to this inven~ion the cutting edge of a scraper (or other earth moving machine as defined above) is made up of a number of female members A and male members B which are arranged in side-by-side interengaging relatio~-ship. In these drawings onl~ one of each ~ember is illustrated but it will be appreciated that there are provided as ~any as may be re~uired to extend the full width of the scraper blade.
Each of the members A and B has a body portio~ 11 with a flat under~ide 12~ a dished uppe side 13, front and rear ends 14 and 15 respectively, and opposite side walls made for interlocki~g engagement with the side walls of adaacent members. In each body portion ll are two longitudinally ~l~323a spaced fastening holes 16 made ta receive the fastening bolts by which the cutting edge members are fastened to the scraper blade. ~he effective width of each of the cutting edge ~embers is such that when the~ are fastsned together the fastening hole~ 16 will be spaced laterally a distance to suit the spacing of the fastening holes in the scraper blade.
~he two side walls 17, 18 of each fe~ale member A are provided with a series of do~etail recesses 19 which are wider at the top than at t~e bottom, with end pieces 20 at the opposite ends, and the side walls 21, 22 of each ~ale member B have a serie~ of male dovetail parts 23 of a shape9 size and longitudinal spacing corresponding to the dimensions o~ the dovetail recesses l9 so as to be capable o~ being interfitted therewith.
The spacing of the dovetail recesses 19 is the same on the two sides of each female member A and, slmilarly, the - spacin~ of the male dovetail parts 23 is the same on each ~ide of each male member B. The dovetail recesses l9 ~nd la~ds 24 between them are so arranged that on each side of eacb female member a la~d 24 i~ in transverse alignment with a fastening hole 16, tha pitch of the dovetail recesses 19 and of the dovetail part~ 23 being the same as the longitud-inal spacing of the fastening holes 16.
It is clear that with that arrangeme~t and spacing of the dovetail recesses 19 and do~etail parts 23, whe~ a number . ~7~
~ ~73238 of male and female members are connected together in inter-locking arrangement to a male ~ember B may be remo~ed ~rom the scraper blade to which it is fastened, rever~ed end for-end, and re-engaged with the ad~acent female member or membersO If it is desired to reverse a female member A in position it is of course necessary to unbolt the adjacent male member or members B, rever~e the fe~ale member A and then fasten the male member or members back in position~
Further9 if it is desired to set a number of the cutting edge members in the drop position those members may be moved longitudinall~ forwards in relation to the remaining members, in the manner as illustrated in Fig. 6, b~ the a~ount of one pitch of the dovetail parts 2~ and then re-bolted in position.
It is believed that when a number of cutting edge members made ~ccording to the invention are correctly bolted - to a scraper blade a~d the scraper is being so operated that the cutting edges dig i~to the ground the pressure o~ the several edge members is in an anti-clockwise direction and the individual edge members will lock with the ad~acent members on the taper of the interengaging dovetail parts;
similarly, when the machine is operated to move forwardl~
the pres~ure on the edge members is in the opposite direction, and the individual edge ~embers will again lock with adjacent members o~ the taper o~ the interengaging do~etail parts.
~ 1732~
Refere~ce is now made to Fig, 7 which illustrates a modification wherein the end of the cutting edge member has a nose 26 adapted to receive and hold a tooth, as for elev-ating scrapers.
It is to be understood that the inventio~ is not limited to the particular interlocking edge means described and illustrated - the female dovetail recesses 19 and male dovetail members 23. Thus~ it may be found convenient to provide longitudinally arranged dovetail recesses i~ the opposite sides of female membe~ A and complementary, longit-udinally arranged dovetail members on the opposite sides of the male member ~. Alternatively~ instead of dovetail inter-engaging parts the male and female members may be provided with tongue-and-groove interfitting parts to permi-t replace-ment of individual parts of the scraper cutting edge and/or end-for-end reversal of such individual parts.
The cutting edge members according to this invention may be made of shell mouldin~ operations of a suitable allo~
steel. Merely b~ way of example, the steel may have the following analysis:
Carbon - O. 2~/o Silicon - O. 60%
Manganese - 0.8~Yo Sulphur - O~ 014% maximum Phosphorus - 0.01~/o maximum Chromium - 1. 87%
1 1~3~3~
NicXel - 0.0~/o Molybdenum - 0. 61-~o the remainder being ironO
However, other alloys known in the art ma~ be found to be more suitable.
As the cutting edge members are made relativel~ narrow in the transverse direction each cutting edge ~ember will be substantiall~ lighter than cutting edges as hitherto provided and one man will be able to handle them with ease, so that one operator may replace or change the position of a cutting edge ~ember9 or a number of cuttlng edge members, on his own.
It will be understood that the cutting edge members as herein described ~y be made as toothed cutti~g edge members - each said cutting edge member havlng one or more teeth at one or both ends - or they may be made to support replaceab.~e teeth in k~own manner.
It is to be appreciated that other modifications in details of design, construction and/or arrangement ~a~ be made and that the invention i~ not limited to the particular construction of cutting edges described above in detail. All such modifications are to be deemed to be included i~ tha ambit of the invention as defined by the appended claims~
,~
1~--
Fig. 5 is a perspective view of the female member;
Fig. 6 shows a plan view of the male and female members in adjusted relative positions; and Fig. 7 is a perspective view of a modified co~struction.
DE~AI~ED DESCRIP~IO~ OF ~EE DRAWINGS
.
According to this inven~ion the cutting edge of a scraper (or other earth moving machine as defined above) is made up of a number of female members A and male members B which are arranged in side-by-side interengaging relatio~-ship. In these drawings onl~ one of each ~ember is illustrated but it will be appreciated that there are provided as ~any as may be re~uired to extend the full width of the scraper blade.
Each of the members A and B has a body portio~ 11 with a flat under~ide 12~ a dished uppe side 13, front and rear ends 14 and 15 respectively, and opposite side walls made for interlocki~g engagement with the side walls of adaacent members. In each body portion ll are two longitudinally ~l~323a spaced fastening holes 16 made ta receive the fastening bolts by which the cutting edge members are fastened to the scraper blade. ~he effective width of each of the cutting edge ~embers is such that when the~ are fastsned together the fastening hole~ 16 will be spaced laterally a distance to suit the spacing of the fastening holes in the scraper blade.
~he two side walls 17, 18 of each fe~ale member A are provided with a series of do~etail recesses 19 which are wider at the top than at t~e bottom, with end pieces 20 at the opposite ends, and the side walls 21, 22 of each ~ale member B have a serie~ of male dovetail parts 23 of a shape9 size and longitudinal spacing corresponding to the dimensions o~ the dovetail recesses l9 so as to be capable o~ being interfitted therewith.
The spacing of the dovetail recesses 19 is the same on the two sides of each female member A and, slmilarly, the - spacin~ of the male dovetail parts 23 is the same on each ~ide of each male member B. The dovetail recesses l9 ~nd la~ds 24 between them are so arranged that on each side of eacb female member a la~d 24 i~ in transverse alignment with a fastening hole 16, tha pitch of the dovetail recesses 19 and of the dovetail part~ 23 being the same as the longitud-inal spacing of the fastening holes 16.
It is clear that with that arrangeme~t and spacing of the dovetail recesses 19 and do~etail parts 23, whe~ a number . ~7~
~ ~73238 of male and female members are connected together in inter-locking arrangement to a male ~ember B may be remo~ed ~rom the scraper blade to which it is fastened, rever~ed end for-end, and re-engaged with the ad~acent female member or membersO If it is desired to reverse a female member A in position it is of course necessary to unbolt the adjacent male member or members B, rever~e the fe~ale member A and then fasten the male member or members back in position~
Further9 if it is desired to set a number of the cutting edge members in the drop position those members may be moved longitudinall~ forwards in relation to the remaining members, in the manner as illustrated in Fig. 6, b~ the a~ount of one pitch of the dovetail parts 2~ and then re-bolted in position.
It is believed that when a number of cutting edge members made ~ccording to the invention are correctly bolted - to a scraper blade a~d the scraper is being so operated that the cutting edges dig i~to the ground the pressure o~ the several edge members is in an anti-clockwise direction and the individual edge members will lock with the ad~acent members on the taper of the interengaging dovetail parts;
similarly, when the machine is operated to move forwardl~
the pres~ure on the edge members is in the opposite direction, and the individual edge ~embers will again lock with adjacent members o~ the taper o~ the interengaging do~etail parts.
~ 1732~
Refere~ce is now made to Fig, 7 which illustrates a modification wherein the end of the cutting edge member has a nose 26 adapted to receive and hold a tooth, as for elev-ating scrapers.
It is to be understood that the inventio~ is not limited to the particular interlocking edge means described and illustrated - the female dovetail recesses 19 and male dovetail members 23. Thus~ it may be found convenient to provide longitudinally arranged dovetail recesses i~ the opposite sides of female membe~ A and complementary, longit-udinally arranged dovetail members on the opposite sides of the male member ~. Alternatively~ instead of dovetail inter-engaging parts the male and female members may be provided with tongue-and-groove interfitting parts to permi-t replace-ment of individual parts of the scraper cutting edge and/or end-for-end reversal of such individual parts.
The cutting edge members according to this invention may be made of shell mouldin~ operations of a suitable allo~
steel. Merely b~ way of example, the steel may have the following analysis:
Carbon - O. 2~/o Silicon - O. 60%
Manganese - 0.8~Yo Sulphur - O~ 014% maximum Phosphorus - 0.01~/o maximum Chromium - 1. 87%
1 1~3~3~
NicXel - 0.0~/o Molybdenum - 0. 61-~o the remainder being ironO
However, other alloys known in the art ma~ be found to be more suitable.
As the cutting edge members are made relativel~ narrow in the transverse direction each cutting edge ~ember will be substantiall~ lighter than cutting edges as hitherto provided and one man will be able to handle them with ease, so that one operator may replace or change the position of a cutting edge ~ember9 or a number of cuttlng edge members, on his own.
It will be understood that the cutting edge members as herein described ~y be made as toothed cutti~g edge members - each said cutting edge member havlng one or more teeth at one or both ends - or they may be made to support replaceab.~e teeth in k~own manner.
It is to be appreciated that other modifications in details of design, construction and/or arrangement ~a~ be made and that the invention i~ not limited to the particular construction of cutting edges described above in detail. All such modifications are to be deemed to be included i~ tha ambit of the invention as defined by the appended claims~
,~
1~--
Claims (10)
1. A pair of cutting edge members adapted to be fastened to a blade-like support member of an earth moving machine, said pair comprising a female cutting edge member and a male cutting edge member, each member having ground-engaging edges at its opposite ends, the female cutting edge member having in at least one of its opposite side edges female interlocking means for engagement by complementary means on the male cutting edge member and the male cutting edge member having on at least one of its opposite side edges male interlocking means for interlocking engagement with said female interlocking means of the female cutting edge member, the said female and male interlocking means being so arranged that one cutting edge member may be adjusted linearly in position on the support member of the earth moving machine relative to the adjacent at least one cutting edge member and may also be reversed in position end-for-end and interlocked again with that adjacent cutting edge member so as to be adapted to be fastened again to said support member of said earth moving machine.
2. The pair of cutting edge members as claimed in claim 1 wherein the interlocking means are dovetail parts on the opposite sides of the cutting edge member, said dovetail parts being engageable in interlocking manner with complementary dovetail parts of adjacent cutting edge members.
3. The pair of cutting edge members as claimed in claim 2 wherein the dovetail parts extend in a direction normal to the plane of the edge member and are of the same shape and are longitudinally spaced equally on both sides of the cutting edge member.
4. The pair of cutting edge members as claimed in claim 2 wherein the dovetail parts of each member are tapered, the dovetail parts of one member being wider at the top than at the bottom and the dovetail parts of the other member being wider at the bottom than at the top such that the dovetail recesses of the latter member are the same size and shape as and adapted -to receive the dovetail parts of the first member.
5. The pair of cutting edge members as claimed in claim 1 or claim 2 wherein the dovetail parts extend longitudinally along the opposite sides of the cutting edge member.
6. The pair of cutting edge members as claimed in claim 1 wherein the interlocking means are tongue-and-groove means on the opposite sides of the cutting edge member.
7. The pair of cutting edge members as claimed in claim 1 wherein the body part has two fastening holes for the reception of bolts for fastening the edge member to the scraper blade.
8. The pair of cutting edge members as claimed in claim 7 wherein the interlocking means are dovetail parts on the opposite sides of the cutting edge member, said dovetail parts being engageable in interlocking manner with complementary dovetail parts of adjacent cutting edge members and the longitudinal spacing of the fastening holes is the same as the longitudinal spacing of the dovetail parts.
9. A pair of cutting edge members adapted to be fastened to a blade-like support member of an earth moving machine, said pair including a female cutting edge member and a male cutting edge member, each member having ground-engaging edges at its opposite ends, the female cutting edge member having along its opposing side edges female interlocking means, complementary male interlocking means along opposing side edges of the male cutting edge member, the said female and male interlocking means being so arranged that each of the cutting edge members may be adjusted linearly in position on the support member of the earth moving machine relative to the other cutting edge member and may also be reversed in position end-for-end and interlocked again with that other cutting edge member so as to be adapted to be fastened again to said support member of said earth moving machine.
10. Cutting edge members in combination with a blade-like support member of a scraper element, said combination comprising:
a blade-like support member to which said cutting edge members are selectively fastened;
at least one male cutting edge member having ground-engaging edges at opposite ends thereof and male interlocking means provided along opposing side edges thereof;
at least one female cutting edge member adapted to interlock with an adjacent male cutting edge member, said female cutting member also having ground-engaging edges at opposite ends thereof and further having female interlocking means provided along opposing side edges thereof adapted to interlock with said male interlocking means provided on said adjacent male cutting member;
means for fastening said male cutting edge member and said female cutting edge member to said support member, said male and female cutting edge members being in direct interlocking contact with one another when fastened to said (claim 10 cont'd) support member, the said female and male interlocking means being so arranged that one cutting edge member may be adjusted linearly in position on the blade of the scraper element relative to the other cutting edge member and may also be reversed in position end-for-end and interlocked again with that other cutting edge member so as to be adapted to be fastened again to said blade of said scraper element.
a blade-like support member to which said cutting edge members are selectively fastened;
at least one male cutting edge member having ground-engaging edges at opposite ends thereof and male interlocking means provided along opposing side edges thereof;
at least one female cutting edge member adapted to interlock with an adjacent male cutting edge member, said female cutting member also having ground-engaging edges at opposite ends thereof and further having female interlocking means provided along opposing side edges thereof adapted to interlock with said male interlocking means provided on said adjacent male cutting member;
means for fastening said male cutting edge member and said female cutting edge member to said support member, said male and female cutting edge members being in direct interlocking contact with one another when fastened to said (claim 10 cont'd) support member, the said female and male interlocking means being so arranged that one cutting edge member may be adjusted linearly in position on the blade of the scraper element relative to the other cutting edge member and may also be reversed in position end-for-end and interlocked again with that other cutting edge member so as to be adapted to be fastened again to said blade of said scraper element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000379329A CA1173238A (en) | 1981-06-09 | 1981-06-09 | Blades for earth moving machines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000379329A CA1173238A (en) | 1981-06-09 | 1981-06-09 | Blades for earth moving machines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1173238A true CA1173238A (en) | 1984-08-28 |
Family
ID=4120184
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000379329A Expired CA1173238A (en) | 1981-06-09 | 1981-06-09 | Blades for earth moving machines |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1173238A (en) |
-
1981
- 1981-06-09 CA CA000379329A patent/CA1173238A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |