CA1075272A - Tool for earthworking machine - Google Patents
Tool for earthworking machineInfo
- Publication number
- CA1075272A CA1075272A CA299,059A CA299059A CA1075272A CA 1075272 A CA1075272 A CA 1075272A CA 299059 A CA299059 A CA 299059A CA 1075272 A CA1075272 A CA 1075272A
- Authority
- CA
- Canada
- Prior art keywords
- arm
- tool
- tool according
- earthworking
- earthworking tool
- 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
- 230000000149 penetrating effect Effects 0.000 claims 1
- 239000002689 soil Substances 0.000 description 17
- 239000000463 material Substances 0.000 description 15
- 230000004048 modification Effects 0.000 description 9
- 238000012986 modification Methods 0.000 description 9
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 239000003583 soil stabilizing agent Substances 0.000 description 4
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 4
- 230000035515 penetration Effects 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920006333 epoxy cement Polymers 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/76—Graders, bulldozers, or the like with scraper plates or ploughshare-like elements; Levelling scarifying devices
- E02F3/78—Graders, bulldozers, or the like with scraper plates or ploughshare-like elements; Levelling scarifying devices with rotating digging elements
- E02F3/783—Graders, bulldozers, or the like with scraper plates or ploughshare-like elements; Levelling scarifying devices with rotating digging elements having a horizontal axis of rotation
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B33/00—Tilling implements with rotary driven tools, e.g. in combination with fertiliser distributors or seeders, with grubbing chains, with sloping axles, with driven discs
- A01B33/08—Tools; Details, e.g. adaptations of transmissions or gearings
- A01B33/10—Structural or functional features of the tools ; Theoretical aspects of the cutting action
- A01B33/103—Structural or functional features of the tools ; Theoretical aspects of the cutting action the rotating shaft being oriented horizontally
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/28—Small metalwork for digging elements, e.g. teeth scraper bits
- E02F9/2866—Small metalwork for digging elements, e.g. teeth scraper bits for rotating digging elements
Abstract
ABSTRACT OF THE DISCLOSURE
A tool for an earthworking machine in which the machine has a rotor with one or more support plates mounted thereon in axially distributed relation with each plate carrying one or more earthworking tools in circumferentially distributed relation. Each tool in circumferentially distributed the respective plate and at the outer end has an earthworking portion extending generally transversely to the plane in which the tool rotates.
A tool for an earthworking machine in which the machine has a rotor with one or more support plates mounted thereon in axially distributed relation with each plate carrying one or more earthworking tools in circumferentially distributed relation. Each tool in circumferentially distributed the respective plate and at the outer end has an earthworking portion extending generally transversely to the plane in which the tool rotates.
Description
10~75'~7Z
The present invention relates to earthworking equipment, and is particularly concerned with a tool, or tooth, for use with earthworking equip~ent in the form of a soil stabilizer or trencher or earth excavating equipment or like machinery.
The tool or tooth accord~ng to the present invention is illustrated and described particularly in connection with a soil stabilizer, but it will be understood that the use of the tool is not limited to this particular application.
A soil stabilizer is a machine which is employed, for example, in certain regions in which the soil is of such a nature that it can be broken up to a fine condition and then supplied with additives, such as lime, salt, fly ash, cement, or the like, which provides a hard foundation in the soil so stabilized.
The mechanism employed for breaking up the soil is known as a soil stab~lizer and consists of at least one shaft extending generally parallel to the surface to be worked and having means for supporting tools or support arms for tools which extend generally radially in respect of the shaft.
The shaft i5 driven while the machine is advanced along the region to be worked and the tools carried by the shaft will cut up the soil and will reduce the soil to a satisfactory fine condition for being mixed with appropriate additives as afore-mentioned to provide for the soil condition referred to above.
Due to the abrasive nature of soil and, in particular, the soil encountered under conditions wherein high silica soils are encountered, ~he teeth or tools on such a piece of equipment 1075'~7'~
wear out quite rapidly and the cost of replac~ng the teeth periodically and including the down time of the mechanism is a substantial item to take into account in respect of the prepara-tion of roadbeds of the nature referred to.
The machines referred to, as well as other types of machines, can encounter such high abrasive conditions and, similarly, rocks are sometimes encountered and, furthermore, sometimes the soil to be reduced is packed down relatively hard and requires considerable effort to open the 80il Up S0 that the machine can reduce it to the desired degree.
A particular object of the present invention is to provide a tool arrangement for an earthworking machine in which the life of the tool arrangement is substantially increased.
A further ob~ect is the provision of a tool arrangement for an earthworking machine or the like in which renewal of the working region of the tooth can be effected ~ reduced cost.
A still further object is the provision of an earthwor~ing tool arrangement in which hard wear resistant material is so loca~ed at the outer end of a support arm for the tool that the arm is protected from abrasion.
BRIEF SUMMARY OF THE INVENTION
According to the present invention, a rotary shaft in a machine supports plates or the like in respective axially spaced planes which are perpendicular to the axis of the shaft. These plates, in turn, support teeth or tools, or tool or tooth supporting arms, in circumferentially distributed relation and, preferably, also in axially distributed relation.
10'7S~7Z
Each arm or tool at the outer end, on a tool ~lement mounted on the outer end of such an arm, is provided with a forwardly facing edge portion provided with hard wear resistant material inserted therein. Such material, in view of the extremely highly abrasive conditions encountered in earthworking operations, can advantageously comprise a cemented hard carbide material such as cemented tungsten carbide or a like wear resistant material such as might be formed by forming a compound o~ a metal with boride or the like.
In general, each arm has a larger portion disposed in a plane perpendicular to the axis of the support shaft and a laterally offset end part. The o~fset end part may, itself, be provided with hard wear resistant material mounted thereon or inserted therein, or the end part may be configured to receive and support a tool element having wear resistant material applied to or imbedded in the forwardly facing edge thereof.
In one modification, the support arm is detachably mounted in a block carried on one of the aforementioned plates and is disposed in a plane extending substantially axially of the shaft so that the arm is presented with the broad side facing in the direction of rotation and with the outermost edge of the arm provided with hard wear resistant material applied thereto or inserted therein.
In operation, the hard edge of the tool elements mounted on the outer end of the arm or the outex end of the anm effects an initial penetration into the formation being worked and also fractures hard portions of the tool element or the arm further 1075'~7~
breaks up the soil and admixes the soil to form a uniform material for treatment to make up the rotor.
The tool elements, when such elements are provided, may be detachably mounted on the outer ends of the support arms, as by interfitting tongue and socket means, or the tool elements may be welded to the outer ends of the arms.
The arms can advantageously be formed of bent strips of sheet metal in which case the thickness of the arm is substan-tially constant from end to end.
However, it is also possible to forge the arms, in which case the thickness could vary from the inner end to the outer end, thereby permitting the outer end to be made to a thickness which would permit drilling or slotting or any other type of machining thereof that might be necessary to accomodate hard wear resistant inserts or to permit hard wear resistant plates to be mounted on the arm or to be i~serted into recesses pro-vided therefor in the arm. By the use of an arm of this nature, welding operations to connect the tool element to the arm can be eliminated.
The exact nature of the present invention will become more clearly apparent upon reference to the following detailed speci-fication taken in connection with the accompanying drawings in which:
Figure 1 is a fragmentary perspective view showing a portion of a rotor of the type assocîated with an earthwor~ing machine which operates as a soil stabilizer.
~(~'75 ~'7~
Figure 2 is a fragmentary perspective view showing the outer end of an arm of the type that can be mounted on the rotor of Figure 1 to form an earthworking tool member.
Figure 3 is a view like Figure 2 but shows a modification.
Figure 4 shows another modification according to the present invention.
Figure 5 shows still another modification in which a tool element is provided at the outer end of the arm which is separable therefrom.
Figure 6 shows a modification of an earthworking element that can be mounted on the arm of Figure 5.
Figure 7 is a fragmentary view, partly in section, showing one end portion of the tool element of Figure 6.
Figure 8 is a view similar to Figure 7 but shows a modified form whieh the tool element or the outer end of the arm can take.
Figure 9 is a view similar to Figure 5 but showing still another modification.
DETAILED DESCRIPTION OF THE INVENTION
Referring to the drawings somewhat more in detail, in Figure l, the shaft 10 is adapted for being rotatably mounted in a soil stabilizing machine of a type adapted for working soil up to about half the diameter of the rotor of which shaft 10 forms the central part. A machine of the general nature referred to is illustrated in the Stephenson United States Patent No. 3,737,199, assigned to the same assignee as the instant application.
Rotor 10 carries a plurality of plates 12 in axially dis-tributed relation and angularly oriented as illustrated in the ~ S~7 ~
drawings so that the corner portions 14 of the plates are arranged in a substantially helical path.
Plates 12 are adapted for supporting generally radially extending arms 16 which may be connected to the respective plate 12 as by a clamp bar 18 and clamp bolts 20. ~dvantageously, the arms incline rearwardly from a radial direction as indicated by angle A on Figure 1. However, the particular angle of the arms in respect of a radial direction is not signi~icant except that this angle is chosen to present the hardened forward edge of the tool elements in the most advantageous position for efficient soil penetration.
Each plate 12 in Figure 1 carries four arms 16 as shown in Figure 1 and each arm has a forward working side as indicated by reference numeral 22 in respect of the arm 16 at the bottom of Figure 1 The working portion 22 is integral with or is welded on or is detachably connected to the outer end of the respective arm, as will be seen in the other figures making up the drawings in this application.
However, each working portion of the outer end of an arm is provided with hard wear resistant material therein, adYan-tageously, cemented tungsten carbide, which will penetrate and cut the earth engaged by the rotor as the supporting machine for the rotor advances along its wor~ing path.
Various ways of providing the hardened forward wor~ing edge on each suppor~ arm are illustrated in the other views in this application.
~(~7 ~ ~ 7 ~
Referring first to Figure 2, the support arm 16 illustrated therein has an offset outer end portion 24 which may extend, for example, at right angles to the plane of the main portion 16 of the arm. Offset outer end portion 24 supports a tool element 26 which is in the form of a block having a slot 28 formed therein along the forward side at the top. Mounted in the slot 28 are hard wear resistant elements 30 advantageously formed of hard metal carbide, such as cemented tungsten carbide and, preferably, brazed or soldered in place in slot 280 The block making up tool element 26 is notched at 32 at one end so as to extend over the forwardly facing side of the generally radial portion of the respective support arm 16 and, in this m~nner, the forwardly facing side of the support arm is protected against abrasion from the soil being worked. It has b een found that the provlsion of the hard wear resistant material in the plane of support arm 16 m2terially reduces the rate at which the forward side of the support arm will abrade away or "wash out~' as the machine operates.
In Figure 3, the support arm illustrated has a laterally offset portion 34 at the outer end corresponding to offset portion 24 in Figure 2. However, the arm itself is machined to receive hard wear resistant elements 36 while a relatively small tool element 38 is seated in the notch and supports f~rther wear res~stant elements 40. In the case of both of the modifi-cations of Figures 2 and 3, the blocks m~king up the tool elements are advantageously held in position as by welding ~2.
~'75'~7~
Figure 4 shows a modified arrangement wherein a support block 50 is provided which is fixed to the support plate and which block has a socket for receiving an end portion 52 of an arm which extends outwardly ~rom the machine rotor and terminates in a transversely slotted end por~ion 54 in which hard wear resistant inserts 56 are mounted. The arm 54 and the block 50 may be provided with aligned apertures through which a retaining pin 58 is inserted and bent over to hold the parts in assembled relation~
In Figure 5, arm 16 corresponding to what is shown in Figures 1 to 3, has an offset end portion 60 which has a socket 62 extending therethrough in the fore and aft direction adapted to receive a tongue element 64 extending rearwardly from a tool element 66 which, on the forwardly facing side, is provided with a surface for receiving insert elements 68 of hard wear resistant material which may, as mentioned, be brazed in place.
A feature of the Figure 5 arrangement is that the forwardly facing side of the tool element is preferably inclined about 10 degrees to the axial plane of the rotor so that the portion of
The present invention relates to earthworking equipment, and is particularly concerned with a tool, or tooth, for use with earthworking equip~ent in the form of a soil stabilizer or trencher or earth excavating equipment or like machinery.
The tool or tooth accord~ng to the present invention is illustrated and described particularly in connection with a soil stabilizer, but it will be understood that the use of the tool is not limited to this particular application.
A soil stabilizer is a machine which is employed, for example, in certain regions in which the soil is of such a nature that it can be broken up to a fine condition and then supplied with additives, such as lime, salt, fly ash, cement, or the like, which provides a hard foundation in the soil so stabilized.
The mechanism employed for breaking up the soil is known as a soil stab~lizer and consists of at least one shaft extending generally parallel to the surface to be worked and having means for supporting tools or support arms for tools which extend generally radially in respect of the shaft.
The shaft i5 driven while the machine is advanced along the region to be worked and the tools carried by the shaft will cut up the soil and will reduce the soil to a satisfactory fine condition for being mixed with appropriate additives as afore-mentioned to provide for the soil condition referred to above.
Due to the abrasive nature of soil and, in particular, the soil encountered under conditions wherein high silica soils are encountered, ~he teeth or tools on such a piece of equipment 1075'~7'~
wear out quite rapidly and the cost of replac~ng the teeth periodically and including the down time of the mechanism is a substantial item to take into account in respect of the prepara-tion of roadbeds of the nature referred to.
The machines referred to, as well as other types of machines, can encounter such high abrasive conditions and, similarly, rocks are sometimes encountered and, furthermore, sometimes the soil to be reduced is packed down relatively hard and requires considerable effort to open the 80il Up S0 that the machine can reduce it to the desired degree.
A particular object of the present invention is to provide a tool arrangement for an earthworking machine in which the life of the tool arrangement is substantially increased.
A further ob~ect is the provision of a tool arrangement for an earthworking machine or the like in which renewal of the working region of the tooth can be effected ~ reduced cost.
A still further object is the provision of an earthwor~ing tool arrangement in which hard wear resistant material is so loca~ed at the outer end of a support arm for the tool that the arm is protected from abrasion.
BRIEF SUMMARY OF THE INVENTION
According to the present invention, a rotary shaft in a machine supports plates or the like in respective axially spaced planes which are perpendicular to the axis of the shaft. These plates, in turn, support teeth or tools, or tool or tooth supporting arms, in circumferentially distributed relation and, preferably, also in axially distributed relation.
10'7S~7Z
Each arm or tool at the outer end, on a tool ~lement mounted on the outer end of such an arm, is provided with a forwardly facing edge portion provided with hard wear resistant material inserted therein. Such material, in view of the extremely highly abrasive conditions encountered in earthworking operations, can advantageously comprise a cemented hard carbide material such as cemented tungsten carbide or a like wear resistant material such as might be formed by forming a compound o~ a metal with boride or the like.
In general, each arm has a larger portion disposed in a plane perpendicular to the axis of the support shaft and a laterally offset end part. The o~fset end part may, itself, be provided with hard wear resistant material mounted thereon or inserted therein, or the end part may be configured to receive and support a tool element having wear resistant material applied to or imbedded in the forwardly facing edge thereof.
In one modification, the support arm is detachably mounted in a block carried on one of the aforementioned plates and is disposed in a plane extending substantially axially of the shaft so that the arm is presented with the broad side facing in the direction of rotation and with the outermost edge of the arm provided with hard wear resistant material applied thereto or inserted therein.
In operation, the hard edge of the tool elements mounted on the outer end of the arm or the outex end of the anm effects an initial penetration into the formation being worked and also fractures hard portions of the tool element or the arm further 1075'~7~
breaks up the soil and admixes the soil to form a uniform material for treatment to make up the rotor.
The tool elements, when such elements are provided, may be detachably mounted on the outer ends of the support arms, as by interfitting tongue and socket means, or the tool elements may be welded to the outer ends of the arms.
The arms can advantageously be formed of bent strips of sheet metal in which case the thickness of the arm is substan-tially constant from end to end.
However, it is also possible to forge the arms, in which case the thickness could vary from the inner end to the outer end, thereby permitting the outer end to be made to a thickness which would permit drilling or slotting or any other type of machining thereof that might be necessary to accomodate hard wear resistant inserts or to permit hard wear resistant plates to be mounted on the arm or to be i~serted into recesses pro-vided therefor in the arm. By the use of an arm of this nature, welding operations to connect the tool element to the arm can be eliminated.
The exact nature of the present invention will become more clearly apparent upon reference to the following detailed speci-fication taken in connection with the accompanying drawings in which:
Figure 1 is a fragmentary perspective view showing a portion of a rotor of the type assocîated with an earthwor~ing machine which operates as a soil stabilizer.
~(~'75 ~'7~
Figure 2 is a fragmentary perspective view showing the outer end of an arm of the type that can be mounted on the rotor of Figure 1 to form an earthworking tool member.
Figure 3 is a view like Figure 2 but shows a modification.
Figure 4 shows another modification according to the present invention.
Figure 5 shows still another modification in which a tool element is provided at the outer end of the arm which is separable therefrom.
Figure 6 shows a modification of an earthworking element that can be mounted on the arm of Figure 5.
Figure 7 is a fragmentary view, partly in section, showing one end portion of the tool element of Figure 6.
Figure 8 is a view similar to Figure 7 but shows a modified form whieh the tool element or the outer end of the arm can take.
Figure 9 is a view similar to Figure 5 but showing still another modification.
DETAILED DESCRIPTION OF THE INVENTION
Referring to the drawings somewhat more in detail, in Figure l, the shaft 10 is adapted for being rotatably mounted in a soil stabilizing machine of a type adapted for working soil up to about half the diameter of the rotor of which shaft 10 forms the central part. A machine of the general nature referred to is illustrated in the Stephenson United States Patent No. 3,737,199, assigned to the same assignee as the instant application.
Rotor 10 carries a plurality of plates 12 in axially dis-tributed relation and angularly oriented as illustrated in the ~ S~7 ~
drawings so that the corner portions 14 of the plates are arranged in a substantially helical path.
Plates 12 are adapted for supporting generally radially extending arms 16 which may be connected to the respective plate 12 as by a clamp bar 18 and clamp bolts 20. ~dvantageously, the arms incline rearwardly from a radial direction as indicated by angle A on Figure 1. However, the particular angle of the arms in respect of a radial direction is not signi~icant except that this angle is chosen to present the hardened forward edge of the tool elements in the most advantageous position for efficient soil penetration.
Each plate 12 in Figure 1 carries four arms 16 as shown in Figure 1 and each arm has a forward working side as indicated by reference numeral 22 in respect of the arm 16 at the bottom of Figure 1 The working portion 22 is integral with or is welded on or is detachably connected to the outer end of the respective arm, as will be seen in the other figures making up the drawings in this application.
However, each working portion of the outer end of an arm is provided with hard wear resistant material therein, adYan-tageously, cemented tungsten carbide, which will penetrate and cut the earth engaged by the rotor as the supporting machine for the rotor advances along its wor~ing path.
Various ways of providing the hardened forward wor~ing edge on each suppor~ arm are illustrated in the other views in this application.
~(~7 ~ ~ 7 ~
Referring first to Figure 2, the support arm 16 illustrated therein has an offset outer end portion 24 which may extend, for example, at right angles to the plane of the main portion 16 of the arm. Offset outer end portion 24 supports a tool element 26 which is in the form of a block having a slot 28 formed therein along the forward side at the top. Mounted in the slot 28 are hard wear resistant elements 30 advantageously formed of hard metal carbide, such as cemented tungsten carbide and, preferably, brazed or soldered in place in slot 280 The block making up tool element 26 is notched at 32 at one end so as to extend over the forwardly facing side of the generally radial portion of the respective support arm 16 and, in this m~nner, the forwardly facing side of the support arm is protected against abrasion from the soil being worked. It has b een found that the provlsion of the hard wear resistant material in the plane of support arm 16 m2terially reduces the rate at which the forward side of the support arm will abrade away or "wash out~' as the machine operates.
In Figure 3, the support arm illustrated has a laterally offset portion 34 at the outer end corresponding to offset portion 24 in Figure 2. However, the arm itself is machined to receive hard wear resistant elements 36 while a relatively small tool element 38 is seated in the notch and supports f~rther wear res~stant elements 40. In the case of both of the modifi-cations of Figures 2 and 3, the blocks m~king up the tool elements are advantageously held in position as by welding ~2.
~'75'~7~
Figure 4 shows a modified arrangement wherein a support block 50 is provided which is fixed to the support plate and which block has a socket for receiving an end portion 52 of an arm which extends outwardly ~rom the machine rotor and terminates in a transversely slotted end por~ion 54 in which hard wear resistant inserts 56 are mounted. The arm 54 and the block 50 may be provided with aligned apertures through which a retaining pin 58 is inserted and bent over to hold the parts in assembled relation~
In Figure 5, arm 16 corresponding to what is shown in Figures 1 to 3, has an offset end portion 60 which has a socket 62 extending therethrough in the fore and aft direction adapted to receive a tongue element 64 extending rearwardly from a tool element 66 which, on the forwardly facing side, is provided with a surface for receiving insert elements 68 of hard wear resistant material which may, as mentioned, be brazed in place.
A feature of the Figure 5 arrangement is that the forwardly facing side of the tool element is preferably inclined about 10 degrees to the axial plane of the rotor so that the portion of
2~ the tool element disposed in front of the forwardly facing side of the support anm leads the remainder of the forward side of the tool element. It has been found that this inclined forward edge on the tool eLement promotes penetration of the tool element into the earth and inhibits loading of the support arm to the extent that it will bend during operation of the machine.
Figure 6 shows a tool element similar to tool element 66 of Figure 5 but in which the forwardly facing side of the tool ~ ~ 7 S'~ 7 ~
element is provided with pointed insert elements 72 in trans-versely distributed relation while therebetween there are mounted the hard wear resistant planar elements 74 which, as in connection with the Figure 5 arrangement, incline rearwardly from bottom to top.
Figure 7 is a fragmentary view of tool element 70 drawn at enlarged scale and shows more in detail the manner in which the inserts 72 are configured and also shows the placement and con-figuration of the hard wear resistant element 74. As before, the wear resistant elements 56 in Figure 4, 68 in Figure 5 and 72 and 74 in Figures 6 and 7, are advantageously brazed in place on the respective support therefor.
Figure 8 shows a tool element 80 having a forward earth engaging portion having laterally spaced inclined planar elements 82 of hard wear resistant material which are braæed on surface regions provided therefor which incline rearwardly from bottom to topO Intermediate ~he elements 82 vertical surfaces are provided on the forward side of element 80 and seated on these ~ertical surfaces and brazed thereto are log cabin shaped inserts 84 of hard wear resistant material.
The arrangement of Figure 8 provides for edges on the lead-ing sides of elements 84 which will penetrate and break up the earth being worked while the inclined surfaces 82 will cause the earth to turn in a preferred direction.
Figure 9 shows a support arm 16 with an offset outer end portion gO to which is attached a tool element 92 as, for example~ by welding 94 with the forward side of the tool element 1075;~7;~
having a slot 96 in which ha~d wear resistant elemen~s 98 are fixed as by brazing.
The forwardly facing side of the tool element in Figure 9 also advantageously inclines to the axial direction as in the case of the Figure 5 modification and for the same purpose.
In every case, it will be understood that the hard wear resistant material is advantageously cemented hard metal carbide, such as cemented tungsten carbide, and that these elements are advantageously brazed or silver soldered in place, although the use of epoxy cement in certain instances is not foreclosed.
Each support arm 16 may be in the form of a strip of steel of uniform thickness from end to end, and this may be obtained from rolling and then cutting the rolled out strip to length and bending the strip to provide for the offset end that is to be found in each arm. Each support arm can also, as mentioned, be forged, thus permitting the support arm to be made to any desired thickness in any region thereof.
Modifications may be made within the scope of the appended claimsO
Figure 6 shows a tool element similar to tool element 66 of Figure 5 but in which the forwardly facing side of the tool ~ ~ 7 S'~ 7 ~
element is provided with pointed insert elements 72 in trans-versely distributed relation while therebetween there are mounted the hard wear resistant planar elements 74 which, as in connection with the Figure 5 arrangement, incline rearwardly from bottom to top.
Figure 7 is a fragmentary view of tool element 70 drawn at enlarged scale and shows more in detail the manner in which the inserts 72 are configured and also shows the placement and con-figuration of the hard wear resistant element 74. As before, the wear resistant elements 56 in Figure 4, 68 in Figure 5 and 72 and 74 in Figures 6 and 7, are advantageously brazed in place on the respective support therefor.
Figure 8 shows a tool element 80 having a forward earth engaging portion having laterally spaced inclined planar elements 82 of hard wear resistant material which are braæed on surface regions provided therefor which incline rearwardly from bottom to topO Intermediate ~he elements 82 vertical surfaces are provided on the forward side of element 80 and seated on these ~ertical surfaces and brazed thereto are log cabin shaped inserts 84 of hard wear resistant material.
The arrangement of Figure 8 provides for edges on the lead-ing sides of elements 84 which will penetrate and break up the earth being worked while the inclined surfaces 82 will cause the earth to turn in a preferred direction.
Figure 9 shows a support arm 16 with an offset outer end portion gO to which is attached a tool element 92 as, for example~ by welding 94 with the forward side of the tool element 1075;~7;~
having a slot 96 in which ha~d wear resistant elemen~s 98 are fixed as by brazing.
The forwardly facing side of the tool element in Figure 9 also advantageously inclines to the axial direction as in the case of the Figure 5 modification and for the same purpose.
In every case, it will be understood that the hard wear resistant material is advantageously cemented hard metal carbide, such as cemented tungsten carbide, and that these elements are advantageously brazed or silver soldered in place, although the use of epoxy cement in certain instances is not foreclosed.
Each support arm 16 may be in the form of a strip of steel of uniform thickness from end to end, and this may be obtained from rolling and then cutting the rolled out strip to length and bending the strip to provide for the offset end that is to be found in each arm. Each support arm can also, as mentioned, be forged, thus permitting the support arm to be made to any desired thickness in any region thereof.
Modifications may be made within the scope of the appended claimsO
Claims (7)
1. An earthworking tool which comprises: an arm adapted to be supported on a rotary member and extending radially outwardly from said member; said arm being L-shaped in configura-tion when viewed in side and having a radially outermost terminal portion that extends laterally to one side only of said arm; said terminal portion having a side facing forwardly in the direction of rotation and a trailing side; said forwardly facing side forming a working portion and having a leading edge thereon; said leading edge when viewed in plan having a foremost penetrating point in the direction of rotation with the remainder of the leading edge angling rearwardly from the direction of rotation.
2. An earthworking tool according to Claim 1 in which said arm is wider in the front to back direction than in the side to side direction.
3. An earthworking tool according to Claim 2 in which said element is sharp on the forward side.
4. An earthworking tool according to Claim 2 in which said forwardly facing side includes a plurality of hard wear resistant elements and including wedge shaped elements having the peak of the wedge forming the leading edge.
5. An earthworking tool according to Claim 3 in which said forward side when viewed in side is inclined relative to the direction of movement.
6. An earthworking tool according to Claim 5 in which the angle of said leading edge is about 15 degrees to the axis about which the arm rotates when viewed in plan.
7. An earthworking tool according to Claim 2 in which said radially outermost terminal portion has a perforation thereon for receiving a shank.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US78545377A | 1977-04-07 | 1977-04-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1075272A true CA1075272A (en) | 1980-04-08 |
Family
ID=25135560
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA299,059A Expired CA1075272A (en) | 1977-04-07 | 1978-03-16 | Tool for earthworking machine |
Country Status (9)
| Country | Link |
|---|---|
| AU (1) | AU521727B2 (en) |
| BE (1) | BE865745A (en) |
| CA (1) | CA1075272A (en) |
| DE (1) | DE2815165C2 (en) |
| FR (1) | FR2386649A1 (en) |
| GB (2) | GB1601904A (en) |
| IT (1) | IT1095107B (en) |
| LU (1) | LU79383A1 (en) |
| NL (1) | NL175209C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3020290A1 (en) * | 1977-04-07 | 1980-12-11 | Kennametal Inc | Long wearing earthworking machine rotary cutting block - has cutting edge sloping back from forward protruding striker tip |
| DE3136077C1 (en) * | 1981-09-11 | 1982-10-28 | Berchem & Schaberg Gmbh, 4650 Gelsenkirchen | Rock cutting head for suction excavators or the like. |
| GB2113177B (en) * | 1982-01-08 | 1986-02-05 | Kennametal Inc | Bit and block assembly |
| IE893937A1 (en) * | 1989-12-08 | 1991-06-19 | Born Na Mona | Processing of peat for horticultural purposes |
| FR2727448A1 (en) * | 1994-11-30 | 1996-05-31 | Draghi Umberto | TOOL MOUNTING DEVICE FOR A ROTOR OF A MACHINE |
| FR2742021B1 (en) * | 1995-12-12 | 1999-10-01 | Patault Daniel | ROTOR DENTE INTENDED TO EQUIP A TURNING DEVICE WITHOUT TURNING AND TEETH PROVIDED TO EQUIP SUCH A ROTOR |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2481679A (en) * | 1945-06-26 | 1949-09-13 | Chain Belt Co | Road building machine |
| US2549088A (en) * | 1946-09-07 | 1951-04-17 | Harnischfeger Corp | Replaceable tooth for rotary earth cutting means |
| FR1113229A (en) * | 1954-10-26 | 1956-03-26 | Blades for rotary soil tillage tools and method of manufacture thereof | |
| US3067533A (en) * | 1959-04-28 | 1962-12-11 | Rotary Hoes Ltd | Trench digging machines |
| US3362482A (en) * | 1965-03-01 | 1968-01-09 | Rex Chainbelt Inc | Rotor for ground working equipment |
| US3375764A (en) * | 1965-10-21 | 1968-04-02 | Petersen Anita E | Removable tooth pavement mixer wheel construction |
| FR1523492A (en) * | 1967-03-24 | 1968-05-03 | Digging tools | |
| US3737199A (en) * | 1971-06-28 | 1973-06-05 | Kennametal Inc | Earthworking tool |
| US3864853A (en) * | 1973-04-27 | 1975-02-11 | Caterpillar Tractor Co | Quick disconnect cutting edge for earthworking implements |
| BR7403793D0 (en) * | 1973-05-21 | 1974-12-24 | Caterpillar Tractor Co | TOOL TO WORK THE LAND |
| US3934654A (en) * | 1974-09-06 | 1976-01-27 | Kennametal Inc. | Earthworking blade device |
-
1978
- 1978-03-15 GB GB10172/78A patent/GB1601904A/en not_active Expired
- 1978-03-15 GB GB34812/80A patent/GB1601905A/en not_active Expired
- 1978-03-16 CA CA299,059A patent/CA1075272A/en not_active Expired
- 1978-03-17 AU AU34229/78A patent/AU521727B2/en not_active Expired
- 1978-04-06 BE BE186607A patent/BE865745A/en not_active IP Right Cessation
- 1978-04-06 IT IT7822032A patent/IT1095107B/en active
- 1978-04-06 LU LU79383A patent/LU79383A1/en unknown
- 1978-04-07 FR FR7810470A patent/FR2386649A1/en active Granted
- 1978-04-07 DE DE2815165A patent/DE2815165C2/en not_active Expired
- 1978-04-07 NL NLAANVRAGE7803746,A patent/NL175209C/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| AU521727B2 (en) | 1982-04-29 |
| DE2815165A1 (en) | 1978-10-12 |
| GB1601904A (en) | 1981-11-04 |
| LU79383A1 (en) | 1978-07-12 |
| FR2386649A1 (en) | 1978-11-03 |
| IT7822032A0 (en) | 1978-04-06 |
| BE865745A (en) | 1978-07-31 |
| GB1601905A (en) | 1981-11-04 |
| AU3422978A (en) | 1979-09-20 |
| FR2386649B1 (en) | 1983-04-08 |
| DE2815165C2 (en) | 1984-11-08 |
| NL175209B (en) | 1984-05-01 |
| NL175209C (en) | 1984-10-01 |
| IT1095107B (en) | 1985-08-10 |
| NL7803746A (en) | 1978-10-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |