WO2013042558A1 - エンジン - Google Patents

エンジン Download PDF

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Publication number
WO2013042558A1
WO2013042558A1 PCT/JP2012/072963 JP2012072963W WO2013042558A1 WO 2013042558 A1 WO2013042558 A1 WO 2013042558A1 JP 2012072963 W JP2012072963 W JP 2012072963W WO 2013042558 A1 WO2013042558 A1 WO 2013042558A1
Authority
WO
WIPO (PCT)
Prior art keywords
radiator
fuel tank
cooling air
cylinder block
air inlet
Prior art date
Application number
PCT/JP2012/072963
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
延広 渡辺
Original Assignee
ヤンマー株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from JP2011205363A external-priority patent/JP5989314B2/ja
Priority claimed from JP2012013484A external-priority patent/JP5846933B2/ja
Application filed by ヤンマー株式会社 filed Critical ヤンマー株式会社
Priority to CN201280045690.1A priority Critical patent/CN103814197B/zh
Publication of WO2013042558A1 publication Critical patent/WO2013042558A1/ja

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
    • F01P11/10—Guiding or ducting cooling-air, to, or from, liquid-to-air heat exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/0076—Details of the fuel feeding system related to the fuel tank
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P2070/00—Details
    • F01P2070/52—Details mounting heat-exchangers

Definitions

  • the present invention relates to a fuel tank fixing structure in an engine.
  • an engine in which a fuel tank is mounted on a cylinder block is known.
  • a fuel tank and a cooling water tank are placed side by side above the cylinder block.
  • a fuel tank and a radiator are disposed adjacent to a cylinder block, and the fuel tank is fixed on the radiator side via a stay provided on the radiator or a stay provided on the cylinder block.
  • the fuel tank vibration is easily transmitted to the radiator in the structure of the fuel tank fixed by the stay provided in the radiator.
  • the gap between the radiator and the fuel tank is narrow, so it is difficult to ensure the strength of the stay, and the cylinder block requires processing of mounting parts such as bolt seats. Become.
  • the present invention provides an engine in which the vibration of the fuel tank is hardly transmitted to the radiator, and the fixing strength of the fuel tank on the radiator side is sufficiently secured.
  • a radiator mounting spacer that is mounted and fixed to the cylinder block and to which the radiator is mounted and fixed, and between the radiator mounting A fuel tank stay attached and fixed to the seat, and the fuel tank is attached and fixed to the fuel tank stay.
  • a radiator mounting spacer that is mounted and fixed to the cylinder block and to which the radiator is mounted and fixed, and the radiator mounting spacer
  • a fuel tank stay to be fixed, and an extension portion extending toward the fuel tank is formed in the radiator mounting spacer, and the fuel tank stay is fixedly attached to the extension portion of the radiator mounting spacer, An edge portion of the fuel tank on the radiator side is attached and fixed to a fuel tank stay.
  • a radiator cover is attached and fixed to the fuel tank stay, and a lifting bolt is attached and fixed to the cylinder block via the fuel tank stay and the radiator mounting spacer.
  • the belt tension adjusting mechanism of the cooling fan of the radiator is fixedly attached to the cylinder block via the radiator mounting spacer.
  • the fuel tank since the fuel tank is not attached to the radiator but is attached to the fuel tank stay of the radiator mounting spacer to which the radiator is attached and fixed, an engine in which the vibration of the fuel tank is not directly transmitted to the radiator can be configured.
  • the fuel tank stay to which the fuel tank is attached since the fuel tank stay to which the fuel tank is attached is attached to the radiator mounting spacer, the gap between the fuel tank and the radiator is effectively used to configure the engine with sufficient fuel tank stay fixing strength. it can.
  • the perspective view which shows an engine The rear view which shows an engine. Sectional drawing in the AA position in FIG. The rear view which shows the fan belt which transmits the motive power of a crankshaft to a fan shaft.
  • the disassembled perspective view which shows the structure which attaches a radiator cover and a fuel tank. The figure which shows a fuel tank attachment stay.
  • the disassembled perspective view which shows the structure of a belt tension adjustment mechanism.
  • the front view which shows an engine.
  • FIG. 4B is a sectional view taken along line BB in FIG. The perspective view which shows the state before integrating a cooling wind inlet screen and a cooling wind inlet duct.
  • B The perspective view which shows the state which integrated the cooling wind inlet screen and the cooling wind inlet duct.
  • FIG. 3 is an enlarged perspective view around a cooling air outlet screen. The simplified side view which shows the step which mounts a cooling air inlet duct and a cooling air inlet screen to a radiator case.
  • the axial direction of the crankshaft 9 of the engine 1 is the front-rear direction
  • the direction indicated by the arrow U in FIG. 1 is “upward”
  • the direction indicated by the arrow L is “left”
  • the direction is indicated by the arrow F. Is called “forward”.
  • the engine 1 is a so-called horizontal water-cooled engine.
  • a cylinder head 3 is provided on the left side surface of the cylinder block 2.
  • an air cleaner 4 and a muffler 5 are provided side by side.
  • a gear case 6 is provided on the front surface of the cylinder block 2
  • a flywheel 7 is provided on the rear surface of the cylinder block 2
  • an oil pan 8 is provided on the lower surface of the cylinder block 2.
  • the flywheel 7 is provided at a rear end portion of a crankshaft 9 described later in detail.
  • a radiator cover 11 that covers the radiator 13 and a fuel tank 10 that stores the fuel of the engine 1 are provided side by side on the upper surface of the cylinder block 2.
  • a radiator 13 and a cooling fan 14 are accommodated in the radiator cover 11.
  • a cooling air inlet screen 15 is provided on the front surface of the radiator cover 11, and a cooling air outlet screen 16 is provided on the rear surface of the radiator cover 11.
  • a light 12 for illumination is provided on the right side surface of the fuel tank 10.
  • crankshaft 9 is installed in the cylinder block 2 in the front-rear direction.
  • the crankshaft 9 is rotatably supported by the cylinder block 2 via a bearing (not shown).
  • the rear end portion of the crankshaft 9 projects rearward from the rear surface of the cylinder block 2.
  • a flywheel 7 is provided at the rear end of the crankshaft 9.
  • a liner 17 is provided on the left side of the cylinder block 2 in the horizontal direction.
  • a water jacket 18 through which cooling water flows is formed around the liner 17.
  • the water jacket 18 is formed so as to open on the upper surface of the cylinder block 2.
  • the water jacket 18 communicates with a cooling water passage (not shown) formed in the cylinder head 3.
  • the liner 17 is internally provided with a piston 20 that can reciprocate (slide) in the horizontal direction.
  • the piston 20 is connected to the crankshaft 9 via a connecting rod 19.
  • the reciprocating motion of the piston 20 is converted into the rotational motion of the crankshaft 9 via the connecting rod 19.
  • a combustion chamber (not shown) is formed between the liner 17, the piston 20, and the cylinder head 3.
  • the radiator 13 includes a radiator core 26 and an upper tank 27.
  • the radiator 13 is attached to the upper surface of the cylinder block 2 via a radiator attachment spacer 250.
  • a number of cooling water tubes 28 through which cooling water flows are extended in the vertical direction.
  • a large number of fins 29 for heat dissipation are provided between the large number of cooling water tubes 28.
  • An upper tank 27 is provided on the upper surface of the radiator core 26. An upper end portion of the cooling water tube 28 is inserted into the upper tank 27 to communicate therewith.
  • a replenishing port 27a for replenishing cooling water is provided on the upper surface of the upper tank 27.
  • a pressure adjusting radiator cap 27b is attached to the supply port 27a.
  • a sub tank 30 is provided on the left side surface of the radiator 13 (radiator core 26). The sub tank 30 is fixed by being sandwiched between the radiator 13 and the fixing stay 39.
  • the sub tank 30 is for maintaining a predetermined amount of cooling water in the radiator 13. That is, when the cooling water in the radiator 13 increases due to thermal expansion, the cooling water in the radiator 13 flows into the sub tank 30, while when the cooling water in the radiator 13 decreases, the cooling water in the sub tank 30 is transferred to the radiator 13. By returning, the cooling water in the radiator 13 is maintained at a predetermined amount.
  • the sub tank 30 and the replenishing port 27a communicate with each other via a hose 37.
  • the cooling fan 14 has a fan shaft 14 a at the center of rotation, is covered with a fan cover 31, and is provided behind the radiator 13.
  • the fan shaft 14 a is installed in the fan cover 31 in the front-rear direction, and is rotatably supported by the fan cover 31 via a bearing 32.
  • a fan pulley 33 is provided at the rear end of the fan shaft 14a.
  • a crank pulley 34 is provided on the flywheel 7 at the rear end of the crankshaft 9.
  • a fan belt 35 is wound around the crank pulley 34 and the fan pulley 33.
  • the power of the crankshaft 9 is transmitted to the fan shaft 14a via the crank pulley 34, the fan belt 35, and the fan pulley 33, whereby the cooling fan 14 rotates.
  • a tension is applied to the fan belt 35 by a tension pulley 36.
  • the cooling air flows into the internal passage in the radiator 13 from the cooling air inlet screen 15 and flows out of the engine 1 from the cooling air outlet screen 16. That is, the radiator 13 is cooled by the cooling air from the cooling fan 14.
  • the radiator mounting spacer 250 mainly has a spacer body 251 and an extension 253 that extends from the spacer body 251.
  • a radiator mounting surface 251A, a cylinder block mounting surface 251B, and a cooling water passage 251F are formed.
  • the radiator mounting surface 251A is formed on the upper surface (surface on the radiator 13 side) of the spacer main body 251 and the lower surface of the radiator 13 is mounted.
  • the lower portion of the radiator 13 is fixed to the radiator mounting surface 251A with a bolt or the like.
  • the cylinder block mounting surface 251B is formed on the lower surface (surface on the cylinder block 2 side) of the spacer body 251 and is mounted on the upper surface of the cylinder block 2. More specifically, the cylinder block mounting surface 251B is mounted on the upper surface of the cylinder block 2 where the water jacket 18 formed above the liner 17 on which the piston 20 slides is located. The cylinder block 2 is fixed to the cylinder block mounting surface 251B with bolts 47. In addition, the spacer body 251 is formed with a bolt hole 251D into which the bolt 47 is inserted.
  • the cooling water passage 251F is formed so as to penetrate the radiator mounting surface 251A and the cylinder block mounting surface 251B.
  • the cooling water passage 251F is connected to the cylinder block 2 (water jacket 18) so as to communicate therewith.
  • the extension portion 253 is a portion for fastening the fuel tank 10 and fixing the fuel tank 10 to the cylinder block 2.
  • the extension portion 253 is a portion that extends from the right side of the spacer body 251 to the right side of the fuel tank 10.
  • the extension 253 has a bracket mounting surface that is flush with the radiator mounting surface 251A.
  • Mounting holes 253B and 253B into which the fixing bolts 49 and 49 for fixing the fuel tank stay 460 can be inserted are formed in the extension portion 253 at a predetermined interval.
  • a protrusion 253C that can contact the lower cylinder block 2 is formed.
  • An insertion hole 253D that penetrates in the vertical direction from the bottom surface of the protrusion 253C to the bracket attachment surface 253A and into which the lifting bolt 48 can be inserted is formed.
  • the radiator cover 11 has mounting portions 111 and 111, a radiator cap hole 112, first bolt holes 113 and 113, and a second bolt hole 114.
  • the mounting portions 111 and 111 are formed by bending downward the pieces provided on the right and left sides of the radiator cover 11.
  • the attachment portions 111 and 111 are provided substantially parallel to each other.
  • the attachment portion 111 is formed with a bolt hole 111A into which the bolt 44 is inserted.
  • the mounting portion 111 is fixed to the radiator cover mounting plate 400 by the bolts 44.
  • the radiator cap hole 112 is formed at a substantially central portion of the radiator cover 11. From the radiator cap hole 112, the supply port 27a of the radiator 13 accommodated in the radiator cover 11 protrudes upward (see FIG. 4).
  • the first bolt holes 113 and 113 are formed on the left side of the upper portion of the radiator cover 11 with an interval in the front-rear direction.
  • the first bolt 41 is inserted into the first bolt hole 113.
  • a first mounting portion of a fixed stay (not shown) is fixed to the radiator cover 11 by the first bolt 41.
  • a second bolt hole 114 into which the lifting bolt 48 can be inserted is formed on the right side of the upper portion of the radiator cover 11.
  • the lifting bolt 48 can lift the entire engine 1 and is configured to be disassembled into a plurality of parts mainly including an eye nut 48a, an upper bolt 48b, a fastening nut 48c, and a lower bolt 48d. .
  • the radiator cover mounting plate 400 is configured such that the length in the front-rear direction, which is the longitudinal direction thereof, is the same as the length of the radiator cover 11 (length in the front-rear direction) (strictly, slightly shorter).
  • the radiator cover mounting plate 400 mainly includes a substrate 411, a side plate 412, and mounting portions 413 and 413.
  • the board 411 is formed with bolt holes 411A and 411A into which the fastening bolts 45 and 45 are inserted.
  • the base plate 411 is fixed to the fuel tank stay 460 via the edge 101 of the fuel tank 10 and the reinforcing plate 102, which will be described later, by the co-fastening bolt 45.
  • the substrate 411 is formed with two bolt holes 411A on the front and rear sides at a predetermined interval. Furthermore, a notch 411B is formed between the bolt holes 411A and 411A, with the right side of the substrate 411 partially cut away.
  • the side plate 412 is provided so that its lower side is connected to the left side of the substrate 411 and is substantially perpendicular to the substrate 411.
  • the attachment portions 413 and 413 are provided so that the left side thereof is connected to the front side and the rear side of the side plate 412 and is substantially perpendicular to the side plate 412.
  • the attachment portions 413 and 413 are provided along the inner side surfaces of the attachment portions 111 and 111 of the radiator cover 11.
  • the mounting portion 413 is formed with a bolt hole 413A into which the bolt 44 is inserted.
  • the attachment portion 111 of the radiator cover 11 is fixed to the attachment portion 413 by bolts 44 or the like.
  • the fuel tank 10 is provided on the upper surface on the crankcase side of the cylinder block 2 side by side with the radiator cover 11 (see FIG. 1).
  • An edge 101 is formed around the fuel tank 10.
  • Bolt holes 101 ⁇ / b> A and 101 ⁇ / b> A into which the fastening bolts 45 can be inserted are formed on the left side of the edge portion 101 on the radiator side with a predetermined interval. Further, an insertion hole 101B into which the lifting bolt 48 can be inserted is formed between the bolt holes 101A and 101A.
  • a reinforcing plate 102 is provided below the left side of the edge 101 of the fuel tank 10.
  • the reinforcing plate 102 is formed by bending a plate-like member at an appropriate position, and has an attachment portion 102A and a contact portion 102B (see FIG. 4).
  • the attachment portion 102A is a portion that is fixed to the lower portion of the edge portion 101 of the fuel tank 10 by spot welding.
  • Bolt holes 102C and 102C are formed in the mounting portion 102A so that the bolts 45 and 45 can be inserted together.
  • An insertion hole 102D is formed in the mounting portion 102A so that the lower bolt 48d of the lifting bolt 48 can be inserted.
  • the contact portion 102B is provided at a substantially right angle with respect to the attachment portion 102A, with the upper side thereof continuing to the right side of the attachment portion 102A.
  • the contact portion 102 ⁇ / b> B is provided at a position in contact with the side surface of the fuel tank 10.
  • the fuel tank stay 460 shown in FIGS. 6 and 7 is provided between the edge portion 101 of the fuel tank 10 and the extension portion 253 of the radiator mounting spacer 250 to firmly support the fuel tank 10. .
  • the fuel tank stay 460 mainly includes a column portion 463, upper beam portions 464A and 464B, lower beam portions 465A and 465B, and wall portions 466A and 466B.
  • the column portion 463 is a substantially cylindrical portion extending in the vertical direction, and an insertion hole 463A into which the lower bolt 48d of the lifting bolt 48 is inserted penetrates in the vertical direction at the axial center.
  • the upper beam portions 464A and 464B are provided so as to extend forward and rearward from the upper end portion of the column portion 463, respectively.
  • a bolt hole 464C into which the fastening bolt 45 is inserted is formed in the front end portion of the upper beam portion 464A so as to penetrate in the vertical direction.
  • a bolt hole 464D into which the co-fastening bolt 45 is inserted is formed at the rear end portion of the upper beam portion 464B so as to penetrate in the vertical direction. That is, the bolt holes 464C and 464D are formed at positions corresponding to the bolt holes 101A and 101A formed in the fuel tank 10.
  • the lower beam portions 465A and 465B are provided to extend forward and rearward from the lower end portion of the column portion 463, respectively.
  • a bolt hole 465C that penetrates in the vertical direction and into which the fixing bolt 49 can be inserted is formed in the front end portion of the lower beam portion 465A.
  • a bolt hole 465D into which the fixing bolt 49 is inserted is formed at the rear end portion of the lower beam portion 465B so as to penetrate in the vertical direction. That is, the bolt holes 465C and 465D are formed at positions corresponding to the mounting holes 253B and 253B of the radiator mounting spacer 250.
  • the wall portions 466A and 466B are provided to strengthen the fuel tank stay 460.
  • the wall portion 466A is provided between the upper beam portion 464A and the lower beam portion 465A on the front side.
  • the wall portion 466B is provided between the upper beam portion 464B and the lower beam portion 465B on the rear side.
  • the fuel tank stay 460 has fixing bolts in the mounting holes 253B and 253B formed in the bolt holes 465C and 465D of the fuel tank stay 460 and the extension portion 253 extended to the fuel tank 10 side of the radiator mounting spacer 250. 49 and 49 are inserted and fixed to the radiator mounting spacer 250.
  • the radiator mounting spacers 250 are fixed to the cylinder block 2 by inserting the bolts 47, 47, 47, 47 into the bolt holes 251 D, 251 D, 251 D, 251 D of the radiator mounting spacers 250. That is, the fuel tank stay 460 is attached to the cylinder block 2 via the radiator attachment spacer 250.
  • the lower bolt 48d of the lifting bolt 48 is inserted into the insertion hole 463A of the fuel tank stay 460 and the insertion hole 253D formed in the extension portion of the radiator mounting spacer 250, and is inserted into the mounting hole of the cylinder block 2 (not shown).
  • the cylinder block 2 is fastened.
  • the lower bolt 48d is inserted into the insertion hole 102D of the reinforcing plate 102 and the insertion hole 101B in the edge portion 101 of the fuel tank 10 on the radiator 13 side. That is, the edge portion 101 on the radiator 13 side of the fuel tank 10 is overlaid on the upper surface of the fuel tank stay 460 via the reinforcing plate 102. Further, the substrate 411 of the radiator cover mounting plate 400 is further overlapped with the edge portion 101 of the fuel tank 10 from this overlapped state. At this time, the lower bolt 48d is not in contact with the radiator cover mounting plate 400 because the notch 411B is formed in the radiator cover mounting plate 400.
  • the tightening bolts 45 and 45 are bolt holes 411 ⁇ / b> A of the radiator cover mounting plate 400. 411A, the bolt holes 101A and 101A of the edge 101, the bolt holes 102C and 102C of the reinforcing plate 102, and the bolt holes 464C and 464D of the fuel tank stay 460. Therefore, the radiator cover mounting plate 400 and the fuel tank 10 to which the reinforcing plate 102 is fixed are fastened together by the fastening bolts 45 and 45 and fixed to the fuel tank stay 460.
  • the upper end of the lower bolt 48d protrudes from the upper surface of the edge 101 of the fuel tank 10.
  • the upper bolt 48b and the lower bolt 48d are fixed to the upper end of the lower bolt 48d by being inserted into the lower end of the upper bolt 48b and by a fastening nut 48c.
  • the upper part of the upper bolt 48 b is inserted into the second bolt hole 114 of the radiator cover 11. Further, the bolts 44 and 44 are inserted into the bolt holes 111A and 111A in the mounting portions 111 and 111 of the radiator cover 11 and the bolt holes 413A in the mounting portions 413 and 413 of the radiator cover mounting plate 400, respectively. By doing so, the radiator cover 11 is fixed to the radiator cover mounting plate 400 by the bolts 44 and 44.
  • the upper end of the upper bolt 48 b protrudes from the upper surface of the radiator cover 11 from the second bolt hole 114.
  • the radiator cover 11 is fixed between the upper bolt 48b and the eye nut 48a.
  • radiator cover 11 is fixed to the fuel tank stay 460 via the radiator cover mounting plate 400, only the fuel tank 10 may be fixed with the joint bolt 45.
  • the engine 1 is an engine 1 having a radiator 13 and a fuel tank 10 adjacent to each other on the upper surface of a cylinder block 2, and is mounted and fixed to the cylinder block 2, and a radiator mounting spacer 250 to which the radiator 13 is mounted and fixed.
  • a fuel tank stay 460 that is fixedly attached to the radiator mounting spacer 250, and an extension 253 that extends toward the fuel tank 10 is formed in the radiator mounting spacer 250.
  • the fuel tank stay 460 is attached and fixed to the extension 253, and the edge portion 101 on the radiator 13 side of the fuel tank 10 is attached and fixed to the fuel tank stay 460.
  • the vibration of the cylinder block 2 causes the fuel tank 10 and the radiator 13 on the upper surface of the cylinder block 2 to vibrate.
  • the fuel tank stay 460 having sufficient strength can be provided between the fuel tank 10 and the cylinder block 2 to sufficiently secure the fixing strength of the fuel tank 10 on the radiator 13 side. Furthermore, by providing the extension portion 253 in the radiator mounting spacer 250, it is not necessary to newly process a bolt seat for fixing the fuel tank into the cylinder block 2, so that a simple structure can be achieved.
  • the fuel tank stay 460 can be firmly fixed to the cylinder block 2 without being affected by the shape of the upper surface of the cylinder block 2 by being fixed to the radiator mounting spacer 250. Further, there is no need to newly process a bolt seat for fixing the fuel tank 10 (for fixing the fuel tank stay 460) into a cylinder block.
  • the engine 1 has a radiator cover 11 attached and fixed to the fuel tank stay 460, and a lifting bolt 48 is attached and fixed to the cylinder block 2 via the fuel tank stay 460 and the radiator mounting spacer 250.
  • the fuel tank stay 460 not only fixes the fuel tank 10 to the cylinder block 2 but also attaches the radiator cover 11 to the fuel tank stay 460 via the radiator cover mounting plate 400, so that the radiator cover 11 is also connected to the cylinder block 2. Can be fixed to. In other words, the fuel tank stay 460 also serves as an attachment member for fixing the radiator cover 11 to the cylinder block 2.
  • the lifting bolt 48 is fixed to the cylinder block 2 via the fuel tank stay 460 and the radiator mounting spacer 250, the fuel tank stay 460 and the radiator mounting spacer 250 are attached to the lifting bolt 48.
  • the member is also used.
  • the cooling fan is driven by a belt hung on a pulley fixed to the crankshaft or flywheel.
  • the belt tension is adjusted by a movable pulley attached to the cylinder block.
  • the movable pulley is attached to the side surface of the cylinder block via a stay.
  • the belt tension adjusting mechanism 70 having a movable pulley can be assembled to the engine 1 without being directly fixed to the cylinder block 2. A detailed configuration will be described below.
  • the belt tension adjusting mechanism 70 is for adjusting the tension of the fan belt 35 that transmits rotation between the crankshaft 9 and the fan shaft 14a (see FIG. 4) to which the crank pulley 34 and the fan pulley 33 are fixed, respectively. is there.
  • the belt tension adjusting mechanism 70 is mainly configured by the tension pulley 36, the support member 71, and the bracket 72 described above.
  • the tension pulley 36 applies tension to the fan belt 35 by contacting and tensioning the fan belt 35.
  • the tension pulley 36 is rotatably supported by a rotation support shaft 36a, and the rotation support shaft 36a projects forward.
  • the support member 71 supports the tension pulley 36 via the rotation support shaft 36a, and the tension pulley 36 tensions the fan belt 35 and the tension pulley 36 separates from the fan belt 35, that is, the left-right direction. In addition, it is movable with respect to the bracket 72.
  • the support member 71 has a left and right direction as a longitudinal direction, and a support hole 71a into which the rotation support shaft 36a of the tension pulley 36 is inserted is formed at the right end thereof.
  • a longitudinal hole 71b into which the fixing bolt 73 is inserted is formed in the middle part of the support member 71 in the left-right direction.
  • the support member 71 has a left end portion protruding forward, and an adjustment hole 71c into which the adjustment bolt 74 is inserted penetrates the left end portion in the left-right direction.
  • the bracket 72 supports the support member 71 and is fixed to the cylinder block 2 via the radiator mounting spacer 250.
  • the bracket 72 is formed by bending a plate material at an appropriate location.
  • the bracket 72 includes a mounting portion 72a that is mounted and fixed on the upper surface of the radiator mounting spacer 250, a support portion 72b that is formed by bending downward from the left side of the rear end side of the mounting portion 72a, and a support portion. An adjustment portion 72c bent forward from the left side of 72b is provided. Fixing holes 72d and 72d into which the bolts 47 and 47 are inserted are formed in the mounting portion 72a at appropriate intervals. As the upper sliding guide 72g of the support member 71 that extends rearward of the support portion 72b and makes it easier to slide the support member 71 in contact with the upper portion of the support member 71. Yes.
  • a guide support hole 72e for inserting the fixing bolt 73 is formed in the support portion 72b so as to penetrate in the front-rear direction.
  • a lower slide guide 72h is formed at the lower portion of the support portion 72b.
  • the lower slide guide 72h is formed so as to be bent rearward and contact the lower portion of the support member 71 so that the support member 71 can easily slide.
  • the adjustment portion 72c is cut at the front side, and an adjustment groove 72f for supporting the adjustment bolt 74 is formed. Since the adjustment groove 72f is cut off at the front side, the adjustment bolt 74 can be easily attached and detached.
  • the rotation support shaft 36a of the tension pulley 36 is inserted into the support hole 71a of the support member 71, and the nut pulley 36 is attached to the tip of the rotation support shaft 36a, whereby the tension pulley 36 is supported by the support member 71. It is fixed so that it can be rotated.
  • the support member 71 and the bracket 72 are fastened by inserting the adjustment bolt 74 in a state where the adjustment hole 71c of the support member 71 and the adjustment groove 72f of the bracket 72 are aligned.
  • a lock nut 74a is screwed onto the adjustment bolt 74 between the adjustment hole 71c and the adjustment groove 72f.
  • the support member 71 and the bracket 72 are inserted into the bracket 72 with the left and right sliding holes 71b and the guide support hole 72e in a state where the long holes 71b and the guide support holes 72e are aligned. Mounted movably.
  • the belt tension adjusting mechanism 70 is fixed together with the radiator mounting spacer 250 having the extension portion 253 together with the bolts 47 and 47 to the cylinder block 2 but the extension portion 253 is not formed.
  • the bolts 47 and 47 may be fastened together with the mounting spacer to the cylinder block 2.
  • the assembled belt tension adjusting mechanism 70 includes fixing holes 72d and 72d of the bracket 72, bolt holes 251D and 251D on the rear side of the radiator mounting spacer 250, and a cylinder block 2 (not shown). By inserting bolts 47 and 47 into the mounting holes, the radiator mounting spacers 250 can be mounted (fixed) to the cylinder block 2.
  • the engine 1 is an engine including a radiator 13 and a fuel tank 10 adjacent to each other on the upper surface of a cylinder block 2, and is attached and fixed to the cylinder block 2, and a radiator mounting spacer 250 to which the radiator 13 is attached and fixed. And a fuel tank stay 460 attached and fixed to the radiator attachment spacer 250, and the fuel tank 10 is attached and fixed to the fuel tank stay 460.
  • the engine 1 is configured such that the belt tension adjusting mechanism 70 of the cooling fan 14 of the radiator 13 is fixedly attached to the cylinder block 2 via the radiator mounting spacer 250.
  • a fan belt 35 that transmits a driving force for driving the cooling fan 14 is wound around the cooling fan 14 that generates cooling air for cooling the radiator 13.
  • a belt tension adjusting mechanism 70 that adjusts the tension of the fan belt 35 is fixedly attached to the cylinder block 2 via a radiator mounting spacer 250.
  • the radiator mounting spacer 250 also serves as a mounting member for the belt adjustment mechanism of the cooling fan 14.
  • tension pulley 36 can be fixed to the engine 1 without providing a special mounting bolt seat such as a bolt hole on the side surface of the cylinder block 2.
  • the cooling device for the radiator 13 mainly includes a cooling air inlet screen 15, a cooling air inlet duct 50, a radiator case 51, a cooling fan 14 covered with a fan cover 31, and a cooling air outlet screen 16. Composed.
  • the cooling device of the radiator 13 is provided above the cylinder block 2 in order from the front to the rear in the order described above.
  • the radiator case 51 is for covering the radiator core 26 of the radiator 13 and bringing the cooling air into contact with the radiator core 26 efficiently.
  • the radiator case 51 is formed in a cylindrical shape having a rectangular cross section, and is provided with a cooling air inlet 51a for taking in cooling air in the front part and a cooling air outlet 51b for letting out cooling air in the rear part.
  • An opening 51 c is provided on the upper surface of the radiator case 51, and an upper tank 27 is provided above the opening 51 c to allow communication with the cooling water tube 28 of the radiator core 26. The part 51c is closed.
  • the cooling air inlet 51a of the radiator case 51 On the outer periphery of the cooling air inlet 51a of the radiator case 51, there is provided an edge portion 51d that protrudes in the left, right, and upper three directions.
  • the left and right edge portions 51d are respectively formed with slit-shaped locking holes 51e and 51e whose longitudinal direction is the vertical direction for locking the retaining members 506 and 506 of the cooling air inlet duct 50 described later.
  • On the outer periphery of the cooling air outlet 51b of the radiator case 51 On the outer periphery of the cooling air outlet 51b of the radiator case 51, there is provided an edge portion 51f that protrudes in the left, right, and upper three directions. Locking holes (not shown) for attaching the fan cover 31 are formed in the left and right edge portions 51f.
  • a locking portion 254 that protrudes downward from the central portion in the left-right direction is formed on the front side surface of the radiator mounting spacer 25 below the radiator case 51.
  • the locking part 254 is formed with a locking hole 254a penetrating in the front-rear direction.
  • the locking part 254 and the locking hole 254a constitute part of a fastening means for fastening the radiator case 51 and the cooling air inlet duct 50.
  • the cooling air inlet screen 15 is attached to the cooling air inlet 51 a of the radiator case 51 via the cooling air inlet duct 50.
  • the cooling air inlet screen 15 is formed integrally with the cooling air inlet duct 50.
  • the cooling air inlet screen 15 includes an outer frame 151, a plurality of bars (standing bars 152, horizontal bars 153), and side portions 154 and 155.
  • the outer frame 151 is a portion formed in a substantially square shape having an opening in the center. Inside the outer frame 151, a standing bar 152 is installed in a “V” shape in a rear view.
  • the horizontal rails 153, 153,... Are installed on the outer frame 151 and the vertical beam 152 so as to be substantially parallel to the upper surface of the radiator cover 11 with a predetermined vertical distance (see FIG. 10). Therefore, a plurality of crosspieces are installed in the opening of the outer frame 151 so as to have a substantially lattice shape.
  • first boss portions 156 and 156 for integrally attaching the cooling air inlet duct 50 to the cooling air inlet screen 15 are provided on the upper side, and second boss portions 157 and 157 are provided on the upper side. Each is formed at the bottom.
  • first boss portion 156 is formed with a boss hole 156a through which the bolt 300 can be screwed.
  • Side portions 154 and 155 are formed on the left and right sides of the outer frame 151 in accordance with the front side surface of the radiator cover 11 (see FIG. 10).
  • a net (not shown) is used in the radiator case 51 of the outer frame 151. Attached to the side.
  • the cooling air inlet duct 50 is provided between the cooling air inlet screen 15 and the radiator case 51, and the cooling air flowing from the cooling air inlet screen 15 is efficiently supplied to the radiator. It is for guiding into the case 51.
  • the cooling air inlet duct 50 has a duct main body portion 501 having a substantially rectangular air passage cross section provided with openings on the front and rear sides, respectively.
  • a flange 502 is formed that protrudes upward, downward, leftward and rightward.
  • a mounting portion 503 is formed at the center in the left-right direction of the duct main body portion 501 and the flange portion 502 so as to protrude downward.
  • the mounting portion 503 is formed with a hole 503a into which a bolt 200 described later can be screwed.
  • the attachment portion 503 and the hole 503a constitute part of a fastening means for fastening the radiator case 51 and the cooling air inlet duct 50.
  • a first cylinder is formed at a location corresponding to the first boss 156 of the cooling air inlet screen 15.
  • a portion 504 is provided.
  • the first cylindrical portion 504 is provided with a female screw portion 504a into which the first boss portion 156 of the cooling air inlet screen 15 can be inserted.
  • a second cylindrical portion 505 is provided at a location corresponding to the second boss portion 157 of the cooling air inlet screen 15.
  • the second cylindrical portion 505 is provided with an insertion hole 505a into which the second boss portion 157 of the cooling air inlet screen 15 can be inserted.
  • latching members 506 and 506 are formed at positions corresponding to the locking holes 51 e and 51 e of the radiator case 51 on both the left and right sides of the flange 502.
  • the latch member 506 is provided so as to protrude rearward from the rear surface of the flange portion 502.
  • the latching member 506 is formed in a hook shape with the tip facing upward, and has a shape that can be inserted into the locking hole 51 e of the radiator case 51.
  • the seal protrusion 507 extends to the radiator case 51 side so as to be in close contact with the inner surface of the duct main body 501 when attached to the radiator case 51, and is substantially “U” below the latch members 506 and 506. It is formed in a letter shape.
  • both can be formed integrally.
  • the first boss portions 156 and 156 of the cooling air inlet screen 15 are inserted into the female screw portions 504a and 504a of the cooling air inlet duct 50, and the second boss portions 157 and 157 of the cooling air inlet screen 15 are inserted. It inserts in the insertion hole 505a of the cooling air inlet duct 50, and it is set as the state of (a) of FIG.
  • the bolts 300 and 300 are inserted from the female screw portions 504a and 504a and fastened to the boss holes 156a and 156a of the cooling air inlet screen 15, so that the state shown in FIG.
  • the cooling air inlet duct 50 is integrally formed.
  • the cooling fan 14 covered with the fan cover 31 is provided on the cooling air outlet 51b side of the radiator case 51 so as to be in contact with the edge portion 51f.
  • the cooling fan 14 has a fan shaft 14 a at the center of rotation, is covered with a fan cover 31, and is provided behind the radiator 13.
  • the fan shaft 14 a is installed in the fan cover 31 in the front-rear direction, and is rotatably supported by the fan cover 31 via a bearing 32.
  • a fan pulley 33 is provided at the rear end of the fan shaft 14a.
  • a crank pulley 34 is provided on the flywheel 7 (see FIG. 2) at the rear end of the crankshaft 9.
  • a fan belt 35 is wound around the crank pulley 34 and the fan pulley 33.
  • the power of the crankshaft 9 is transmitted to the fan shaft 14a via the crank pulley 34, the fan belt 35, and the fan pulley 33, whereby the cooling fan 14 rotates.
  • a tension is applied to the fan belt 35 by a tension pulley 36.
  • the fan cover 31 is disposed between the radiator case 51 and the cooling air outlet screen 16.
  • the radiator case 51 is attached to the radiator cover 11 by being fixed to the edge 51f of the radiator case 51 with a bolt or the like.
  • a connecting portion 31 a that allows the radiator case 51 and the cooling air outlet screen 16 to be fastened together is provided on the upper left side of the fan cover 31.
  • mounting holes 31b and 31c for allowing the cooling air outlet screen 16 to be mounted are disposed in the upper left and right center portions of the lower left and right sides of the fan cover 31.
  • the cooling air outlet screen 16 is mainly composed of an outer frame (first outer frame 161, second outer frame 162) and bars (standing bars 163 and 163, first middle bars). 164, 164..., Second intermediate rails 166, 166.
  • the cooling air outlet screen 16 is arranged so that the fan pulley 33 and the fan belt 35 for driving the cooling fan 14 protrude rearward from the rear side surface of the radiator cover 11. It is formed so that a part protrudes according to those shapes.
  • the first outer frame 161 is a portion formed in a substantially square shape having an opening in the lower right portion, and is arranged so as to be substantially flush with the rear side surface of the radiator cover 11.
  • the second outer frame 162 is a mountain-shaped portion that is disposed in the center of the first outer frame 161 at a predetermined interval in the vertical direction.
  • the upper part of the second outer frame 162 is formed to be significantly longer than the front-rear width of the first outer frame 161.
  • the lower portion 165 of the second outer frame 162 is formed in a substantially inverted “V” shape, and is formed with a shorter front-rear width than the second outer frame 162.
  • the second outer frame 162 is configured to drive the cooling fan 14 such as the fan pulley 33 and the fan belt 35 by projecting outwardly from the first outer frame 161 and providing a space in the lower part. It is configured not to contact the member.
  • upright bars 163 and 163 are installed with a predetermined interval in the left-right direction and so that the left-right interval increases as it goes upward. .
  • the first middle rail 164 is spaced between the first outer frame 161 and the second outer frame 162 with a predetermined interval in the vertical direction so as to be parallel to the inclination of the upper surface of the radiator cover 11 (see FIG. 2). It will be erected. By configuring in this way, the design is improved.
  • the left side of the first middle rail 164 is arranged substantially horizontally, while the right side of the first middle rail 164 is provided so as to become lower toward the right.
  • the first middle rail 164 constructed between the first outer frame 161 and the right standing rail 163 is arranged so as to become lower toward the right side, and the cross section becomes higher as it goes rearward.
  • the side where the air cleaner 4 and the muffler 5 are located is high and the reverse direction (opposite direction) where the air cleaner 4 and the muffler 5 are located is inclined and disposed.
  • the high-temperature cooling air is hardly sucked into the air cleaner 4 and the exhaust gas discharged from the muffler 5 is not stirred.
  • the second middle rail 166 is installed on the second outer frame 162 so as to be substantially horizontal at a predetermined interval.
  • each surface of the first middle crosspiece 164 and the second middle crosspiece 166 has a front side to the rear side, that is, the radiator case 51 side to the outside, in other words,
  • the first outer frame 161, the second outer frame 162, and the standing bars 163 and 163 are respectively inclined and inclined so as to become higher toward the outflow side.
  • the side surface portion 167 is formed on the right side surface of the first outer frame 161 so as to protrude rightward.
  • the side surface portion 167 is formed so as to be flush with the rear side surface of the radiator cover 11 when the cooling air outlet screen 16 is attached to the fan cover 31.
  • An attachment hole 167 a for attaching to the fan cover 31 is formed in the side surface portion 167.
  • a mounting hole 168 is formed in the first middle rails 164 and 164 at the lower left of the cooling air outlet screen 16.
  • a mounting portion 169 protrudes to the left, and a mounting hole 169a is formed in the mounting portion 169.
  • These mounting holes 167a, 168, and 169a correspond to the mounting holes 31b and 31c and the connecting portion 31a of the fan cover 31 shown in FIG. 4, respectively. 31 is fixed.
  • the locking holes 51 e and 51 e are hidden from the radiator cover 11 when viewed from the front, but the cooling air inlet screen 15 and the cooling air inlet duct 50 are seen from the lower right side of the radiator cover 11.
  • the cooling air inlet duct 50 is positioned between the radiator cover 11 and the radiator case 51.
  • the hook members 506 and 506 are inserted into the locking holes 51e and 51e so that the state shown in FIG. 21B is changed from the state shown in FIG. 21A to the edge 51d of the radiator case 51. And the flange 502 of the cooling air inlet duct 50 are brought into contact with each other. Further, the cooling air inlet duct 50 and the cooling air inlet screen 15 are moved upward so that the latching member 506 is along the locking hole 51e. Then, as shown in FIG. 21C, the upper end of the locking hole 51e comes into contact with the constriction of the hooking member 506, and the cooling air inlet duct 50 and the cooling air inlet screen 15 no longer move upward. .
  • the axial center of the locking hole 254a of the radiator mounting spacer 25 and the hole 503a of the cooling air inlet duct 50 are the same, and the bolt 200 is screwed into the locking hole 254a and the hole 503a, thereby the radiator case. 51 and the cooling air inlet duct 50 can be fastened. That is, the locking hole 254a of the radiator mounting spacer 25, the hole 503a of the cooling air inlet duct 50, and the bolt 200 are fastening means for fastening the cooling air inlet screen 15 to the radiator case 51 via the cooling air inlet duct 50. It has become.
  • the cooling projection 507 of the cooling air inlet duct 50 protruding into the radiator case 51 from the edge portion 51d of the radiator case 51 comes into contact with the inner edge of the radiator case 51 so that the radiator case 51 and the cooling case 51 are cooled.
  • the sealing property with the wind inlet duct 50 is improved.
  • cooling air inlet screen 15 and the cooling air inlet duct 50 are removed by the reverse procedure described above, and the radiator case 51 can be in the state shown in FIG.
  • the cooling air inlet duct 50 and the cooling air inlet screen 15 are integrally formed, it is easy to attach and detach as described above, and therefore maintenance is easy to perform.
  • the engine 1 includes, on the cooling air inlet 51a side of the radiator case 51, a cooling air inlet screen 15 that prevents intrusion of dust and a cooling air inlet duct 50 that guides the cooling air to the radiator case 51. It is formed integrally and is detachably configured on the cooling air inlet 51a side of the radiator case 51.
  • the cooling air inlet screen 15 and the cooling air inlet duct 50 are integrally formed, thereby improving the sealing performance between the cooling air inlet screen 15 and the cooling air inlet duct 50, maintenance, etc. Both can be removed at the same time.
  • the structure of the cooling air inlet screen 15 and the cooling air inlet duct 50 is simplified, leading to cost reduction.
  • the opening state of the cooling air inlet 51a to which foreign matters such as dust can easily adhere can be kept good, so that the introduction of the cooling air into the engine 1 can be made smooth. It is possible to prevent a decrease in cooling efficiency in the cooling device of the engine 1.
  • the engine 1 has locking holes 51e and 51e formed on the cooling air inlet 51a side of the radiator case 51, and a latch member 506 is formed on the cooling air inlet duct 50 corresponding to the locking holes 51e and 51e.
  • the radiator case 51 and the cooling air inlet duct 50 are provided with fastening means.
  • the latching members 506 and 506 in the cooling air inlet duct 50 integrated with the cooling air inlet screen 15 are locked in the locking holes 51e and 51e on the cooling air inlet side, and fastening means By fastening both, the positioning of the cooling air inlet duct 50 with respect to the cooling air inlet 51a is facilitated and can be easily attached and detached. Therefore, it is easy to perform maintenance with a simple structure, and it becomes easy to keep the opening state of the cooling air inlet 51a in good condition, and as a result, it is possible to prevent the cooling efficiency of the cooling device of the engine 1 from being lowered.
  • the cooling air inlet duct 50 protrudes toward the radiator case 51 and is provided with a seal protrusion 507 along the inner edge of the radiator case 51.
  • the cooling air inlet screen 15 becomes cooling air, and the cooling air inlet screen 15 passes through the cooling air inlet duct 50. Then, it flows into the radiator case 51 that houses the radiator core 26 of the radiator 13. At this time, the cooling air takes heat of the radiator 13 that has become high temperature, thereby cooling the radiator 13 and the cooling air becomes high temperature. That is, the radiator 13 is cooled by the cooling air.
  • the high-temperature cooling air passes through the fan cover 31 and flows out from the cooling air outlet screen 16.
  • the cooling air flowing out from the cooling air outlet screen 16 is inclined so as to become higher as the first middle beam 164 and the second middle beam 166 move rearward. Therefore, the cooling air strikes the upper surface of the first middle rail 164, so that the direction is changed upward and flows out from the cooling air outlet screen 16.
  • the first middle rail 164 on the right side is arranged so as to become lower toward the right side, and its cross section becomes higher toward the rear side, that is, is inclined in a direction opposite to that of the air cleaner 4. Therefore, the cooling air that flows out from the right side of the cooling air outlet screen 16 passes through the first middle rail 164 on the right side, so that the direction can be changed diagonally upward to the right. That is, the cooling air flowing out from the first middle rail 164 on the right side flows out in a direction away from the air cleaner 4.
  • the first middle rail 164 on the right side is inclined in the direction opposite to that of the air cleaner 4 attached to the engine body, so that the cooling air heated by the radiator 13 does not enter the air cleaner 4 while having a simple structure. Therefore, it is possible to prevent a decrease in engine output due to the high temperature of the engine 1, and it is possible to prevent the engine 1 itself from becoming a high temperature, thereby preventing a decrease in cooling efficiency in the cooling device for the engine 1. .
  • the engine 1 is an engine in which a radiator 13 is disposed on a cylinder block 2 and a cooling fan 14 is disposed on one side of the radiator 13, and the radiator 13 is covered with a radiator case 51.
  • a radiator case 51 Is provided with a cooling air inlet 51a for taking in cooling air and a cooling air outlet 51b through which the cooling air flows out, and on the cooling air outlet 51b side of the radiator case 51, a plurality of bars (standing bars 163 and 163, A cooling air outlet screen 16 formed from the first middle rails 164, 164..., The second middle rails 166, 166.
  • the cooling air passage surfaces of the plurality of bars (standing bars 163 and 163, first middle bars 164 and 164..., Second middle bars 166 and 166...) Are inclined so that the outside becomes higher. Yes.
  • the engine 1 is an engine in which a radiator 13 is disposed on a cylinder block 2 and a cooling fan 14 is disposed on one side of the radiator 13, and the radiator 13 is covered with a radiator case 51.
  • a radiator case 51 Is provided with a cooling air inlet 51a for taking in cooling air and a cooling air outlet 51b through which the cooling air flows out, and a plurality of bars (standing bars 163 and 163) are provided at the cooling air outlet 51b side of the radiator case 51.
  • the plurality of crosspieces (standing crosspieces 163, 163, first middle The crosspieces 164, 164 ..., the second middle crosspieces 166, 166 ...) are tilted so that the side opposite to the air cleaner 4 attached to the engine body is lowered. It is.
  • the cooling air heated by the radiator 13 does not enter the air cleaner 4 while having a simple structure, thereby preventing a decrease in engine output due to the engine 1 becoming hot.
  • the engine 1 itself since it is possible to prevent the engine 1 itself from becoming high temperature, it is possible to prevent a decrease in cooling efficiency in the engine cooling device.
  • the present invention is applicable to a fuel tank fixing structure in a horizontal water-cooled engine.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
PCT/JP2012/072963 2011-09-20 2012-09-07 エンジン WO2013042558A1 (ja)

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CN110605959B (zh) * 2019-10-22 2020-09-22 中国北方车辆研究所 集成化一体支承吊装装置

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CN103899455B (zh) 2017-04-12
CN103814197A (zh) 2014-05-21
CN103814197B (zh) 2016-07-20

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