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
  • E02F3/80—Component parts
  • E02F3/815—Blades; Levelling or scarifying tools

Definitions

• This invention relates to a bulldozer blade and, more particularly, to an improved mounting assembly for an inside arm C-frame of said blade.
• a bulldozer blade has a pair of arms pivoted to the tractor frame near the lower front corner of said tractor frame.
• spring-cushioning arrangements are provided for the upper corners of the blade which are connected to the tractor frame near the upper" corners thereof. This arrangement may provide force for pushing upwardly against the front of the frame of the tractor which could lift the front of the frame of the tractor relative to the tracks reducing the effect ⁇ iveness of the push.
• a mountin assembly for mounting a bulldozer blade to a tractor frame using a C-frame connected to said bulldozer blade and to a pair of interconnected mounting brackets.
• Each bracket is pinned to said tractor frame and has a trunnion carried by a lower portion of said bracket..
• a member is provided for supporting a forward portion of eac bracket on said tractor frame to permit fore and aft move ⁇ ment of said bracket relative to said tractor frame.
• the second problem has to do with th weakening of the tractor frame by a plurality of holes for attaching a bracket or by welding a bracket onto the frame for securing the ends of the C-frame to the tractor frame.
• Each arm of the C-frame of the bull- • dozer blade is pivotally connected to a trunnion carried by one of the brackets so that forces created by pushing heavy loads with the bulldozer blade will not lift the front of the tractor, nor will the tractor frame be weakened by the use of several bolts or by welding, both of which applied shear and other loads directly to the tractor frame. None of the prior art provides such a bracket with such a loading arrangement.
• FIG. 1 is a broken away elevational view of the front portion of the tractor frame and the mounting assembly for mounting a bulldozer blade to said tractor frame;
• Fig. 2 is a somewhat exploded view of the con ⁇ nection between the front portion of the bracket and the tractor- frame of Fig. 1;
• Fig. 3 is a front elevational view of the two brackets interconnected by a belly guard structure;
• Fig 4 is a top view of a bracket and part of the belly guard of Fig. 2;
• Fig. 5 is an enlarged broken away view.of a modification of the bracket assembly of Fig. 1;
• Fig. 6 is a cross-sectional view taken along the line 6-6 of Fig. 5;
• Fig. 7 is a partial front view of the bracket of Fig. 5 showing part of the belly guard attached thereto; and, Fig. 8 is an enlarged partial cross-sectional view taken along the line 8-8 of Fig;. 5.
• a tractor 10 has only the front lower corner of the frame 12 shown and has a pair of tracks 14 with one shown in phantom in its rela ⁇ tive position with respect thereto.
• a cushioned push blade assembly 16 is comprised of a C-frarae 18 having spaced arms 20,20 pivotally connected to a mounting assembly 22 which mounting assembly is connected to the frame 12 of the tra tor 10.
• the front end portion of the C-frame 18 is pivot ally connected at 24 to the lower corners of the push bla 26.
• the upper portions of the push blade 26 are pivotall and resiliently connected to the push blade assembly 16 which connection includes resilient cushioning means 28 a the like.
• the construction and assembly of the push blad assembly 16 including the C-frame 18, the push blade 26, and the cushioning means 28, together with the connection of the push blade 26 to the C-frame 18, is conventional a can be any one of the many different arrangements availab on the market.
• the push blade 26 is shown in solid lines in the down position and is shown in phantom or dotted lines in the raised position.
• a hydraulic actu or similar apparatus is provided between the upper portio of the tractor frame 12 and the push blade assembly 16 so to raise and lower the front of the C-frame 18 and the pus blade 26 as desired.
• An embodiment of the present invention is best illustrated in Figs.
• each bracket 30 is comprised of a pair of spaced apart somewhat triangularly-shaped side plates 34 and 36 which are held apart in rigid relationship by a plurality of plates 38, 40 and 42 with portions 35,37 of the spaced sid walls or plates 34 and 36 extending upwardly from said sup port plate 38 and having aligned openings 44,46, respectiv ly, therethrough.
• the upwardly extending portions 35,37 with the openings 44 and 46 are adapted to straddle the si rail 23 of the tractor 10 so that the openings 44 and 46 will align with an aperture 48 through bushings 49 in said side frame of the tractor so that a pin 50 can pass there ⁇ through to pin the plates 34,36 of each bracket 30 to the tractor frame 12.
• a trunnion 52 which is fas.tened in apertures 54 in the side plates 34 and 36.
• the trunnions 52 are located below the frame 12 of the tractor 10 when the support plate 38 of the bracket engages against the -bottom face of-the tractor-frame.
• - -Each arm 20,20 of the C-frame 18 is pivotally attached to a trunnion 52 of a brac ⁇ ket 30 by a cap 55 and bolts 57 wherein said bolts secure the cap over the trunnion 52 and against the end of the arms 20,20 so that the C-frame 18 is pivoted relative to the brac ⁇ ket 30 and is supported by the brackets.
• each bracket 30 project forwardly of the portions 35,37 and trunnions 52 to provide a forward portion.60 which has a bifurcated end portion 62 attached to the outer end portion thereof.
• the bifurcated portion 62 has a pair of spaced apart arms 64,66 projecting outwardly in a pair of planes lying parallel to the longitudinal axis of the bracket 30.
• the arms 64 and 66 have aligned apertures 68 therethrough.
• the arms 64,66 are adapted to straddle an ear 72 depending from the forward portion of the tractor frame.
• the ear 72 has an aperture 70 which is aligned with the apertures 68 in the arms 64,66.
• a pin 74 is passed through the apertures 68 and 70 and is held therein by locking caps 75.
• each aperture 68 is greater than the diameter of the pin 74 while the diameter of the aperture 70 is substantially the same as the diameter of said pin 74., such that the pin 74, when in position in said apertures 68, 70,68, serves to hold the forward portion 60 of the bracket loosely to the tractor frame 12 but at the same time permits fore and aft movement between the pin 74 and the bracket 30.
• pin 50 resists all the fore and aft shear loads while pin 74 feeIs' only the vertical force resulting from summing moments about pin 50. Since trunnion 52 is closer to pin 50 than to pin 74, the result- ing vertical force in pin 74 is greatly reduced.
• a belly guard 32 which is comprised of a plurality of appro ⁇ priately shaped plates and reinforcements 78, which belly guard 32 is attached to the brackets 30 to hold the brac ⁇ kets 30 in substantially rigid spaced apart relationship and acts to stabilize one bracket 30 with respect to the other.
• a modified embodiment such as shown in Figs.
• each bracket 130 is sub- stantially the same and are connected to the belly guard in substantially the same manner.as the embodiment of Fig 1-4.
• a pin 150 passes through apertures 144 in portions 137 and in aperture 148 in the bushings 149 in the tracto frame to pin the bracket to the frame.
• Each bracket has trunnion 152 attached thereto by means of a cap 155 and b 157.
• the forward portion 162 of the bracket 130 is attac to the tractor frame in a different manner. That is, the side walls 134 and 136 of the bracket are held spaced apa by spacer plates with one such plate 138 having, near the outer end portion thereof, an oblong or elongate opening formed therethrough.
• an elongate, long spacer 182 which is of the samegeneral shape but of smaller size than the opening 180 in the plate 138, is pos tioned in the opening 180 and is held therein by an enlar oblong washer or retainer 184 and a pair of bolts 186 whic are threaded into openings 188 in the rail 123 of the fram
• the elongate spacer 182 has an axial length which is greater than the thickness of the top plate 138 so as hold the washer or retainer 184 spaced from the plate 138 the bracket.
• the washer or retainer 184 is larger than th opening 180 in the top plate 138 so that it overlaps with the opening 180 at least partially around the outer periph thereof to retain the forward portion 162 of the bracket i position"on the tractor frame.
• the spacer 182 is of a siz as to .provide a clearance all the way around the outer per iphery thereof such that the bracket can move fore and aft without placing any load on the bolts 186 and on the tract frame around the bolts 186.
• the space 182 is of a thickness as to position the retainer 184 such that the forward portion 162 of the bracket can move towar
• the belly guard 132 extends between the spaced apart brackets 130,130, which belly guard is free to pivot out of covering relationship with respect to the engine or driveline either about the pin 74 of Fig. 2 or about the attaching pin 50,150 securing the bracket to the tractor frame.
• the side arms 20,20 of the C-frame 18 are connected to the brackets 30 by means of caps 55 which are bolted over the trunnions 52 whereupon the C-frame 18 is- pivotally mounted about the axis of the trun- nion 52 as it is raised and lowered during use. All of the forces transmitted from the tractor 10 to the push blade 26 will go through the brackets 30 and through the push arms 20,20 and since the connections between the C-frame 18 and the brackets 30 are rearward of the front corner of the trac- tor frame 12, the forces will be applied directly- into the tractor frame and will not have a tendency to lift the front of the tractor- frame.
• Th bracket is connected to the tractor frame by a pair of su stantially aligned pins 50 which will not materially weak the frame as was the case heretofore with bolting and/or welding the bracket to the lower portion of the frame.
• the C-fra 18 is disconnected from the brackets 30 and the rear pins are pulled from the upper portion of the brackets 30 so t the brackets and the belly guard 32 are pivoted about the axis of the forward pin 74 so as to provide access to the undercarriage.
• the embodiment shown in Figs. 5-8 provides for bolting the forward end of the bracket to the tractor fra but in such a way that no shear loads are created on the fasteners or on the tractor frame. In this way, smaller fasteners can be used which will not have any material affect on the structural strength of the tractor frame.
• the brackets 130 are connected to the tractor frame by a pair of aligned pins 150,150 with the crossplate 138 of each bracket 130 bearin against the undersurface of the tractor frame.
• the pins 150 for mounting.the brackets 130 to the frame do not weaken the tractor frame and are locat rearward to a point that the front of the tractor is not lifted under extreme pushing forces.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Mining & Mineral Resources (AREA)
• Civil Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Structural Engineering (AREA)
• Body Structure For Vehicles (AREA)

Priority Applications (3)

Applications Claiming Priority (2)

Publications (1)

Family

ID=25489290

Family Applications (1)

Country Status (7)

Citations (11)

Family Cites Families (1)

• 1978
  • 1978-10-10 US US05/949,589 patent/US4270616A/en not_active Expired - Lifetime
• 1979
  • 1979-08-23 DE DE792953086A patent/DE2953086A1/de not_active Withdrawn
  • 1979-08-23 BR BR7908848A patent/BR7908848A/pt unknown
  • 1979-08-23 GB GB8003688A patent/GB2042026B/en not_active Expired
  • 1979-08-23 WO PCT/US1979/000643 patent/WO1980000722A1/en unknown
  • 1979-08-23 JP JP1980600006U patent/JPS6115095Y2/ja not_active Expired
  • 1979-08-29 CA CA000334677A patent/CA1120711A/en not_active Expired
• 1981
  • 1981-10-06 CA CA387,449A patent/CA1133247A/en not_active Expired

Patent Citations (11)

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