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WO2012008189A1 - Châssis de chenilles pour véhicule du type à chenilles - Google Patents

Châssis de chenilles pour véhicule du type à chenilles Download PDF

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Publication number
WO2012008189A1
WO2012008189A1 PCT/JP2011/059007 JP2011059007W WO2012008189A1 WO 2012008189 A1 WO2012008189 A1 WO 2012008189A1 JP 2011059007 W JP2011059007 W JP 2011059007W WO 2012008189 A1 WO2012008189 A1 WO 2012008189A1
Authority
WO
WIPO (PCT)
Prior art keywords
plate
idler wheel
frame
connection flange
side frame
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.)
Ceased
Application number
PCT/JP2011/059007
Other languages
English (en)
Japanese (ja)
Inventor
生井　喜雄
慎一 田邉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Construction Machinery Co Ltd
Original Assignee
Hitachi Construction Machinery Co Ltd
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
Application filed by Hitachi Construction Machinery Co Ltd filed Critical Hitachi Construction Machinery Co Ltd
Priority to CN201190000613.5U priority Critical patent/CN203127002U/zh
Publication of WO2012008189A1 publication Critical patent/WO2012008189A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D55/00—Endless track vehicles
    • B62D55/08—Endless track units; Parts thereof
    • B62D55/10—Bogies; Frames
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D55/00—Endless track vehicles
    • B62D55/08—Endless track units; Parts thereof
    • B62D55/088—Endless track units; Parts thereof with means to exclude or remove foreign matter, e.g. sealing means, self-cleaning track links or sprockets, deflector plates or scrapers
    • B62D55/0882—Track or sprocket cleaning devices mounted on the frame
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D55/00—Endless track vehicles
    • B62D55/08—Endless track units; Parts thereof
    • B62D55/14—Arrangement, location, or adaptation of rollers
    • B62D55/15—Mounting devices, e.g. bushings, axles, bearings, sealings

Definitions

  • the present invention relates to a track frame of a tracked vehicle including a crawler such as a hydraulic excavator or a hydraulic crane.
  • a hydraulic excavator as a representative example of a tracked vehicle is a self-propelled lower traveling body equipped with a crawler belt, an upper revolving body that is turnably mounted on the lower traveling body, and the upper revolving body. It is roughly constituted by a working device provided so as to be able to move up and down.
  • the hydraulic excavator can stably travel on rough terrain such as a work site, and performs excavation work of earth and sand using a work device.
  • the lower traveling body of the hydraulic excavator is usually provided on the left and right sides of the center frame with a track frame having side frames extending in the front and rear directions, and on the front and rear sides of the side frames.
  • An idler wheel, a drive wheel provided on the other side of the front and rear sides of the side frame, and a crawler belt wound around the idler wheel and the drive wheel are provided.
  • the side frame is provided with a side frame main body located at the front and rear center portions and a connection flange on one side of the front and rear directions of the side frame main body, to which the idler wheel is attached.
  • the bracket includes a driving wheel bracket that is provided on the other side of the front and rear directions of the side frame body via another connection flange and to which a driving wheel is attached.
  • the side frame body has an inverted U-shaped cross-sectional shape with an open bottom end and extends in the front and rear directions.
  • the side frame body includes an inner surface plate attached to a leg portion of the center frame, and the inner surface plate. And an outer plate facing each other in the left and right directions, and an upper plate connecting the inner plate and the upper end of the outer plate.
  • the idler wheel bracket is usually arranged on the center frame side with the idler wheel interposed therebetween, and an inner plate provided with an inner upper plate bent toward the idler wheel on the upper end side, and the center frame with the idler wheel interposed therebetween. And an outer side plate provided with an outer upper plate that is bent toward the idler wheel on the upper end side.
  • a yoke guide that supports an inverted U-shaped yoke that rotatably supports the idler wheel so as to be movable forward and backward.
  • a tension adjusting device for adjusting the tension of the crawler belt is usually provided between the yoke supporting the idler wheel and the side frame body.
  • the tension adjusting device when the crawler belt is deformed due to road surface undulation or the like, the yoke is moved forward and backward along the yoke guide of the idler wheel bracket according to the expansion and contraction of the coil spring constituting the tension adjusting device. Thereby, the distance between the idler wheel supported by the yoke and the drive wheel is appropriately changed according to the deformation of the crawler belt, and the tension of the crawler belt can be adjusted (Patent Document 1).
  • the upper surface plate constituting the side frame main body is inclined obliquely downward from the inner surface plate toward the outer surface plate, so that the mud fallen on the upper surface plate along the inclination. What can discharge
  • the idler wheel bracket for example, by making the height dimension of the outer plate smaller than the height dimension of the inner plate, the inner upper plate of the inner plate and the outer upper plate of the outer plate are respectively separated from the inner plate. It is inclined diagonally downward toward the board. Thereby, the mud etc. which fell to the idler wheel bracket can be discharged
  • the height of the outer plate constituting the idler wheel bracket is made smaller than the height of the inner plate in order to improve the mud scavenging property of the idler wheel bracket, means such as welding should be used on the connection flange. Compared to the strength (cross-sectional strength) of the inner plate to be joined using, the strength of the outer plate is lowered.
  • the present invention has been made in view of the above-described problems of the prior art, and can improve the durability of the idler wheel bracket by making it possible to equalize the strength of the inner and outer plates while maintaining the mud sweeping property of the idler wheel bracket. It is an object of the present invention to provide a track frame for a tracked vehicle that can perform the above.
  • the present invention comprises a center frame and a side frame attached to the center frame via left and right legs and extending in the front and rear directions.
  • a side frame body located at the center in the rear direction, a front wheel frame bracket, a free wheel bracket provided on one side of the rear direction via a connection flange to which a free wheel is mounted, a front side of the side frame body,
  • a driving wheel bracket provided on the other side in the rear direction via another connection flange, to which a driving wheel is attached
  • the side frame main body includes an inner surface plate attached to the leg portion, the inner surface plate and the left
  • the floating plate comprises an outer surface plate facing rightward and an upper surface plate that connects the inner surface plate and the upper end portion of the outer surface plate and is inclined obliquely downward from the inner surface plate toward the outer surface plate.
  • the bracket is disposed on the center frame side with the idler wheel interposed therebetween and has an inner plate provided with an inner upper plate on the upper end side, and is disposed on the opposite side of the center frame with the idler wheel disposed on the upper end side.
  • the present invention is applied to a track frame of a tracked vehicle constituted by an outer plate provided with an upper plate.
  • the inner upper plate of the inner plate forms an inclined surface inclined obliquely downward from the idler toward the inner plate, and the outer upper plate of the outer plate is the idler wheel. In other words, an inclined surface inclined obliquely downward toward the outer plate is formed.
  • the inner upper plate provided on the inner plate of the idler wheel bracket is inclined obliquely downward from the idler wheel toward the inner plate, and the outer upper plate provided on the outer plate is changed to the idler wheel. It is possible to incline obliquely downward toward the outer side plate. Therefore, it is not necessary to make the height dimension of the outer plate smaller than that of the inner plate, and the height dimension of the inner plate and the outer plate can be set almost equal. As a result, the strength (cross-sectional strength) of the inner plate and the strength (cross-sectional strength) of the outer plate that are joined to the connection flange by means such as welding can be made uniform. As a result, it is possible to suppress the twisting of one of the inner plate and the outer plate constituting the idler wheel bracket when turning the tracked vehicle, and to increase the durability of the idler wheel bracket. Therefore, the reliability of the tracked vehicle can be improved.
  • the inner upper plate provided on the inner plate and the outer upper plate provided on the outer plate are inclined to the left and right sides with respect to the position of the idler wheel, so that mud or the like jumped up by the track Can be smoothly discharged along the inclined surfaces of the inner upper plate and the outer upper plate, and good mud scavenging property of the idler wheel bracket can be ensured.
  • the side frame body between the corner portion where the outer surface plate and the upper surface plate of the side frame body intersect, and the corner portion where the outer plate and the outer upper plate of the idler wheel bracket intersect, the side frame body. And a step portion having a dimension larger than the plate thickness dimension of the connection flange connecting the idle wheel bracket and the idle wheel bracket.
  • connection flange a corner corner portion where the outer surface plate and the upper surface plate of the side frame body intersect, and a corner corner portion where the outer plate and the outer upper plate of the idler wheel bracket intersect.
  • the step portion formed between them is set to a dimension that is not less than 2 times and not more than 5 times the plate thickness dimension of the connection flange.
  • the inner plate and the outer plate of the idler wheel bracket are formed symmetrically in the left and right directions with the idler wheel interposed therebetween.
  • the strength of the inner plate and the strength of the outer plate that are joined to the connection flange by means of welding or the like can be made uniform, and one of the inner plate and the outer plate constituting the idler wheel bracket can be made. It is possible to reliably prevent the side plate from being twisted.
  • the inner upper plate and the outer upper plate of the idler wheel bracket are connected by the upper connecting plate extending in the left and right directions at a position adjacent to the connecting flange, and the upper connecting plate is , It is configured to incline in a mountain shape so as to be symmetrical in the left and right directions from the central portion in the right direction toward the inner and outer plates of the idler bracket.
  • This configuration can increase the strength of the entire idler bracket.
  • mud falling on the upper connecting plate is discharged to the inner plate side or the outer plate side along the angle of the mountain of the upper connecting plate, so that it is possible to improve the mud sweeping property of the idler wheel bracket.
  • the surface of the inner plate facing the idler wheel is provided with an inner guide that forms a closed space between the inner plate and the surface of the outer plate facing the idler wheel.
  • the closed space has a substantially equal cross-sectional area.
  • the cross-sectional strength of the inner plate fixed to the connecting flange and the cross-sectional strength of the outer plate can be made uniform, and the tracked vehicle performs left turn traveling and right turn traveling.
  • the durability of the idler wheel bracket can be enhanced, and the stability during traveling of the tracked vehicle can be enhanced.
  • FIG. 4 is an enlarged cross-sectional view of the side frame body and the like as viewed from the direction of arrows IV-IV in FIG.
  • FIG. 5 is an enlarged cross-sectional view of the idler wheel bracket, idler wheel, connection flange, and side frame body as viewed from the direction of arrows VV in FIG. 1 with the crawler belt omitted. It is an expanded sectional view of the same position as Drawing 5 showing the idler wheel bracket which removed the idler wheel, a connection flange, and a side frame main part.
  • FIG. 5 is an expanded sectional view of the same position as Drawing 5 showing the idler wheel bracket which removed the idler wheel, a connection flange, and a side frame main part.
  • FIG. 7 is a cross-sectional view of the idler wheel bracket, the connection flange, and the side frame body as seen from the direction of arrows VII-VII in FIG. 6. It is sectional drawing which shows the idler wheel bracket by a comparative example, a connection flange, and a side frame main body. It is sectional drawing seen from the arrow IX-IX direction in FIG. 8 which shows the idler wheel bracket, connection flange, and side frame main body by a comparative example. It is an expanded sectional view of the position similar to FIG. 6 which shows the idler wheel bracket by a modification.
  • reference numeral 1 denotes a hydraulic excavator as a typical example of a tracked vehicle.
  • the hydraulic excavator 1 includes a tracked lower traveling body 2 capable of self-propelling and a swivel wheel 3 on the lower traveling body 2.
  • the track-type (crawler-type) lower traveling body 2 is for traveling on uneven surfaces such as construction sites and rough terrain, and includes one end of a track frame 11 described later and a side frame 14 described later.
  • An idler wheel 6 provided rotatably on the side, a drive wheel 7 provided on the other end of the side frame 14, and a crawler belt 8 provided around the idler wheel 6 and the drive wheel 7. And is roughly composed.
  • the track frame 11 serves as a base of the lower traveling body 2 and forms a strong support structure.
  • the track frame 11 is roughly constituted by a center frame 12 positioned in the center and side frames 14 described later disposed on both the left and right sides of the center frame 12. ing.
  • Reference numeral 12 denotes a center frame that constitutes the center portion of the track frame 11.
  • the center frame 12 is formed in a substantially X shape when viewed from above, and is formed in an X shape that is substantially equal to the upper plate 12A.
  • the lower plate 12B is disposed below the upper plate 12A with a gap, and a large number of (for example, eight) connecting plates 12C that connect the upper plate 12A and the lower plate 12B.
  • leg portions 12D formed of an upper plate 12A, a lower plate 12B, and connecting plates 12C are provided, two at a distance from each other in front and rear.
  • the left and right side frames 14, which will be described later, are attached to the distal ends of the leg portions 12D.
  • a large-diameter cylindrical support cylinder 13 is provided at the center of the upper plate 12 ⁇ / b> A, and the upper revolving body 4 is mounted on the support cylinder 13 via the revolving wheel 3.
  • left and right side frames 14 show the left and right side frames according to the present embodiment. These left and right side frames 14 are arranged on both the left and right sides of the center frame 12 and extend in the front and rear directions. As shown in FIG. 3, the side frame 14 is roughly configured by a side frame body 15, an idler wheel bracket 17, and a drive wheel bracket 26 described later.
  • Reference numeral 15 denotes a side frame main body positioned in the center of the front and rear directions (length direction) of the side frame 14, and the side frame main body 15 is formed with an inverted U-shaped cross-sectional shape having an open lower end side. It extends in the rear direction.
  • the side frame main body 15 is fixed to the tip of the left leg 12D of the center frame 12 by means of welding or the like, and rises substantially vertically, and the inner surface plate 15A and the left and right directions And an upper surface plate 15C connecting the upper end portion of the inner surface plate 15A and the upper end portion of the outer surface plate 15B.
  • a free wheel bracket 17 is attached to one end side in the front and rear directions of the side frame main body 15 via a connecting flange 16 described later, and the other end side in the front and rear directions of the side frame main body 15 is described later.
  • a drive wheel bracket 26 is attached via the connection flange 25.
  • the height dimension H2 of the outer surface plate 15B is set smaller than the height dimension H1 of the inner surface plate 15A (H1> H2).
  • the corner portion (corner portion) 15D where the inner surface plate 15A and the upper surface plate 15C intersect is positioned higher than the corner corner portion 15E where the outer surface plate 15B and the upper surface plate 15C intersect, and the upper surface plate 15C is the inner surface plate.
  • An inclined surface that is inclined obliquely downward from 15A toward the outer surface plate 15B is formed. In this case, as shown in FIGS.
  • connection flange 16 denotes a connection flange provided on one end side in the front and rear directions of the side frame main body 15.
  • the connection flange 16 has a substantially J-shape on the idler wheel bracket 17 side, which will be described later, on the lower end side of a thick steel plate material. It is formed by bending.
  • the connection flange 16 has a shape substantially similar to the outer shape of the idler wheel bracket 17 as viewed from the front, and is formed as a plate that is slightly larger than the outer shape of the idler wheel bracket 17.
  • the plate thickness dimension T of the connection flange 16 is set to, for example, about 19 mm to 25 mm.
  • connection flange 16 is fixed to an end edge portion on one end side of the side frame body 15 by means of welding or the like, and an idler bracket 17 described later is welded to the front surface 16B of the connection flange 16 or the like. It is fixed using the means.
  • connection flange 16 maintains the welding strength of each end edge of the side frame 14 as a whole even when the end edge shape of the side frame body 15 and the end edge shape of the idler wheel bracket 17 are different. It functions as a strength member.
  • Reference numeral 17 denotes an idler wheel bracket provided on one side of the front and rear directions of the side frame body 15 via the connection flange 16.
  • the idler wheel bracket 17 is fixed to the front surface 16B of the connection flange 16 by means of welding or the like, and the idler wheel 6 is attached to be rotatable and movable in the front and rear directions.
  • the idler wheel bracket 17 is roughly constituted by an inner plate 18, an outer plate 19, an upper connecting plate 21, an inner guide 22, and an outer guide 23 which will be described later. ing.
  • Reference numeral 18 denotes an inner plate disposed on the center frame 12 side with the idler wheel 6 interposed therebetween.
  • the inner plate 18 rises substantially vertically while facing the idler wheel 6, and the riser plate 18A
  • the inner upper plate 18B is bent toward the idler wheel 6 from the upper end side.
  • the inner plate 18 has a rear end edge portion fixed to the front surface 16B of the connection flange 16 by means of welding or the like, and extends forward and rearward from the connection flange 16.
  • a later-described inner guide 22 is provided on a surface of the inner plate 18 that faces the idler wheel 6.
  • the inner upper plate 18B of the inner plate 18 has the idler wheel 6 side (position near the idler wheel 6) at the highest position, and from this position toward the rising plate 18A. An inclined surface that is inclined obliquely downward is formed. Thereby, the mud etc. which fell on the inner upper board 18B of the inner board 18 become a structure discharged
  • Reference numeral 19 denotes an outer plate disposed on the opposite side of the center frame 12 with the idler wheel 6 interposed therebetween.
  • the upper and lower plates 19B are bent toward the idler wheel 6 from the upper end side of the plate 19A.
  • the outer plate 19 has a rear end edge portion fixed to the front surface 16B of the connection flange 16 by means of welding or the like, and extends forward and rearward from the connection flange 16.
  • an outer guide 23 described later is provided on a surface of the outer plate 19 that faces the idler wheel 6.
  • the outer upper plate 19B of the outer side plate 19 has the idler wheel 6 side (position near the idler wheel 6) at the highest position, and from this position toward the rising plate 19A. An inclined surface that is inclined obliquely downward is formed. Thereby, the mud etc. which fell on the outer upper board 19B of the outer side board 19 become a structure discharged
  • the inner upper plate 18B of the inner plate 18 and the outer upper plate 19B of the outer plate 19 constituting the idler wheel bracket 17 are inclined diagonally downward on both left and right sides with respect to the position of the idler wheel 6.
  • An inclined angled surface is formed. Therefore, the height dimension of the inner side plate 18 and the height dimension of the outer side plate 19 can be set substantially equal, and the inner side plate 18 and the outer side plate 19 are symmetrical in the left and right directions around the idler wheel 6. Is formed.
  • the corner plate 19 ⁇ / b> C where the rising plate 19 ⁇ / b> A and the outer upper plate 19 ⁇ / b> B of the outer plate 19 constituting the idler wheel bracket 17 intersect is an outer plate constituting the side frame body 15.
  • the dimension L of the stepped portion 20 is set to be larger than the plate thickness dimension T of the connection flange 16 to which the side frame body 15 and the idler wheel bracket 17 are fixed.
  • the dimension is set to be not less than 2 times and not more than 5 times the plate thickness dimension T of the flange 16.
  • the dimension L of the stepped portion 20 is set to 40 mm or more and 100 mm or less.
  • the thickness F of the connecting flange 16 is determined between the corner 19C of the outer plate 19 constituting the idler wheel bracket 17 and the corner 15E of the side frame body 15.
  • the step portion 20 having a large dimension L is also formed.
  • FIG. 7 when the crawler belt 8 is wound around the idler wheel 6 and the drive wheel 7, an arrow is indicated from the corner portion 15 ⁇ / b> E of the side frame body 15 toward the connection flange 16 due to the tension of the crawler belt 8.
  • a load in the F1 direction (shear load) is applied, and a load in the F2 direction (shear load) is applied from the corner 19C of the outer plate 19 constituting the idler wheel bracket 17 toward the connection flange 16.
  • the distance (step 20) between the point P1 of the load acting on the connection flange 16 from the corner corner 15E and the point of action P2 of the load acting on the connection flange 16 from the corner corner 19C. Can be maintained at a large value. As a result, the shear stress acting on the connection flange 16 can be reduced.
  • Reference numeral 21 denotes an upper connecting plate that connects the inner upper plate 18B of the inner plate 18 and the outer upper plate 19B of the outer plate 19, and the upper connecting plate 21 is substantially flat in plan view using a thick steel plate material or the like. It is formed in a U-shape and extends in the left and right directions at a position adjacent to the connection flange 16.
  • the upper connecting plate 21 is fixed to the front surface 16B of the connection flange 16, the inner upper plate 18B of the inner plate 18, and the outer upper plate 19B of the outer plate 19 by means of welding or the like. The joining strength of the plate 19 is reinforced.
  • the upper connecting plate 21 forms a mountain-shaped inclined surface so as to be symmetrical in the left and right directions from the central portion in the left and right directions toward the inner plate 18 and the outer plate 19 of the idler wheel bracket 17. ing. As a result, the mud or the like dropped on the upper connecting plate 21 is discharged along the inclined surface of the upper connecting plate 21 to the inner plate 18 side or the outer plate 19 side of the idler wheel bracket 17. .
  • Reference numeral 22 denotes an inner guide provided on a surface of the inner plate 18 facing the idler wheel 6, and the inner guide 22 has a substantially L-shaped cross-sectional shape and extends in the front and rear directions and a lower guide frame 22A. It consists of a frame 22B.
  • the upper guide frame 22A is fixed to the rising plate 18A and the inner upper plate 18B of the inner plate 18 by means of welding or the like, and between the rising plate 18A, the inner upper plate 18B, and the upper guide frame 22A, A closed space 22C is formed.
  • the lower guide frame 22B is fixed to the rising plate 18A of the inner plate 18 using means such as welding, and a closed space 22D is formed between the rising plate 18A and the lower guide frame 22B.
  • a guide groove 22E that extends in the front and rear directions at a constant interval.
  • the guide groove 22E guides a left bearing 24 described later.
  • Reference numeral 23 denotes an outer guide provided on a surface of the outer plate 19 that faces the idler wheel 6, and the outer guide 23 has a substantially L-shaped cross-sectional shape and extends in the front and rear directions, like the inner guide 22. It consists of an upper guide frame 23A and a lower guide frame 23B.
  • the upper guide frame 23A is fixed to the rising plate 19A and the outer upper plate 19B of the outer plate 19 by means of welding or the like, and between the rising plate 19A, the outer upper plate 19B, and the upper guide frame 23A, A closed space 23C is formed.
  • the lower guide frame 23B is fixed to the rising plate 19A of the outer plate 19 using means such as welding, and a closed space 23D is formed between the rising plate 19A and the lower guide frame 23B.
  • a guide groove 23E extending in the front and rear directions with a constant interval is formed between the upper guide frame 23A and the lower guide frame 23B.
  • the guide groove 23E guides a right bearing 24 described later.
  • left and right bearings 24 attached to the front end side of a yoke are movable forward and backward, respectively.
  • the both ends of the support shaft 6A provided on the idler wheel 6 are rotatably supported by the left and right bearings 24.
  • the idler wheel 6 can move forward and backward while being guided by the inner guide 22 and the outer guide 23 of the idler wheel bracket 17 while being supported rotatably by the left and right bearings 24. ing.
  • a closed space 22C formed between the inner plate 18 and the upper guide frame 22A of the inner guide 22, and a closed space 23C formed between the outer plate 19 and the upper guide frame 23A of the outer guide 23, Can be formed as a closed space having approximately equal cross-sectional areas.
  • a closed space 22D formed between the inner plate 18 and the lower guide frame 22B of the inner guide 22 and a closed space 23D formed between the outer plate 19 and the lower guide frame 23B of the outer guide 23 are provided.
  • the cross-sectional strength of the inner plate 18 fixed to the connection flange 16 and the cross-sectional strength of the outer plate 19 can be made uniform.
  • One of them is configured to be able to suppress the occurrence of twisting.
  • Reference numeral 25 denotes another connection flange fixed to the other end side in the front and rear direction of the side frame main body 15, and 26 denotes the other side of the front and rear direction of the side frame main body 15 through the other connection flange 25.
  • the drive wheel bracket provided is shown.
  • the other connection flange 25 also maintains the welding strength between the side frame main body 15 and the drive wheel bracket 26.
  • the drive wheels 7 are attached to the drive wheel brackets 26, and the crawler belts 8 wound around the idle wheels 6 and the drive wheels 7 are driven by rotating the drive wheels 7 by a traveling hydraulic motor (not shown). It is configured to circulate.
  • a tension adjusting device (not shown) is provided between the idler wheel 6 and the side frame main body 15, and even when the crawler belt 8 is deformed due to road surface undulation or the like when the hydraulic excavator 1 travels, the tension adjusting device.
  • the tension of the crawler belt 8 can be adjusted appropriately by changing the distance between the idle wheel 6 and the drive wheel 7.
  • the hydraulic excavator 1 has the track frame 11 as described above, and the self-propelled to the work site by rotating the driving wheel 7 and rotating the crawler belt 8 between the idler wheel 6 and the excavator 1. Then, excavation work of earth and sand is performed using the working device 4.
  • the upper surface plate 15C includes the upper end portion of the inner surface plate 15A disposed on the center frame 12 side and the outer surface plate disposed on the side opposite to the center frame 12.
  • the upper end of 15B is connected.
  • the upper surface plate 15C forms an inclined surface inclined obliquely downward from the inner surface plate 15A toward the outer surface plate 15B.
  • the inner upper plate 18B of the inner plate 18 located on the center frame 12 side with the idler wheel 6 interposed therebetween is inclined obliquely downward from the idler wheel 6 side toward the inner plate 18. It forms as an inclined surface which inclines.
  • the outer upper plate 19B of the outer plate 19 located on the opposite side of the center frame 12 across the idler wheel 6 is formed as an inclined surface inclined obliquely downward from the idler wheel 6 side toward the outer plate 19. ing.
  • the crawler belt 8 can smoothly move between the idler wheel 6 and the drive wheel 7.
  • the inner upper plate 18B of the inner side plate 18 and the outer upper plate 19B of the outer side plate 19 are diagonally inclined on the left and right sides with respect to the position of the idler wheel 6.
  • a mountain-shaped inclined surface inclined downward is formed. Therefore, the height dimension of the inner side plate 18 and the height dimension of the outer side plate 19 can be set substantially equal, and the inner side plate 18 and the outer side plate 19 are symmetrically about the idler wheel 6 in the left and right directions. Can be formed.
  • a closed space 22C formed between the inner plate 18 and the upper guide frame 22A of the inner guide 22, and a closed space 23C formed between the outer plate 19 and the upper guide frame 23A of the outer guide 23, Can be formed as a closed space having approximately equal cross-sectional areas.
  • a closed space 22D formed between the inner plate 18 and the lower guide frame 22B of the inner guide 22 and a closed space 23D formed between the outer plate 19 and the lower guide frame 23B of the outer guide 23 are provided.
  • the cross-sectional strength of the inner plate 18 fixed to the connection flange 16 and the cross-sectional strength of the outer plate 19 can be made uniform, and when the excavator 1 performs left turn traveling and right turn traveling, It is possible to suppress the twisting of one of the plate 18 and the outer plate 19. As a result, the durability of the idle wheel bracket 17 can be increased, and the stability of the excavator 1 during travel can be increased.
  • the inner plate 18 and the outer plate 19 of the idler wheel bracket 17 are formed symmetrically in the left and right directions around the idler wheel 6.
  • the thickness of the connection flange 16 is between the corner 19 ⁇ / b> C where the rising plate 19 ⁇ / b> A and the outer upper plate 19 ⁇ / b> B intersect with the corner 15 ⁇ / b> E of the side frame body 15.
  • a stepped portion 20 having a dimension L larger than the dimension T can be formed.
  • the distance between the point P1 of the load acting on the connection flange 16 from the corner corner 15E and the point P2 of the load acting on the connection flange 16 from the corner corner 19C (step 20 Can be maintained at a large value.
  • connection flange 16 from the corner corner 15E of the side frame body 15 an arrow acting on the connection flange 16 from the corner corner 19C of the outer plate 19 constituting the idler wheel bracket 17 are shown.
  • the shear stress acting on the connection flange 16 due to the load in the direction F2 can be reduced, and the durability of the connection flange 16 can be increased.
  • the side frame 114 according to the comparative example is attached to the side frame main body 15 similar to the side frame 14 according to the present embodiment and the front and rear sides of the side frame main body 15 via the connection flange 116.
  • An idler wheel bracket 117 described later is provided.
  • the height dimension H2 of the outer surface plate 15B is smaller than the height dimension H1 of the inner surface plate 15A as in the case of the present embodiment. Is set.
  • the upper surface plate 15C that connects the upper end portions of the inner surface plate 15A and the outer surface plate 15B forms an inclined surface that is inclined obliquely downward from the inner surface plate 15A toward the outer surface plate 15B.
  • the idler wheel bracket 117 includes an inner plate 118 composed of a rising plate 118A and an inner upper plate 118B, an outer plate 119 composed of a rising plate 119A and an outer upper plate 119B, and an inner upper plate 118B and an outer upper plate 118B.
  • the upper connecting plate 120 is connected to the plate 119B, the inner guide 121 is provided on the inner surface side of the inner plate 118, and the outer guide 122 is provided on the inner surface side of the outer plate 119.
  • the inner guide 121 has an upper guide frame 121A and a lower guide frame 121B.
  • a closed space 121C is formed between the inner plate 118 and the upper guide frame 121A, and the inner guide 121 and the lower guide frame 121B are provided between them.
  • a closed space 121D is formed.
  • the outer guide 122 includes an upper guide frame 122A and a lower guide frame 122B.
  • a closed space 122C is formed between the outer plate 119 and the upper guide frame 122A, and the outer plate 119 and the lower guide frame 122B.
  • a closed space 122D is formed between them.
  • a guide groove 122E extending in the front and rear directions is formed.
  • the inner upper plate 118B of the inner plate 118 extends in the horizontal direction from the upper end side of the rising plate 118A toward the idler wheel.
  • the outer upper plate 119B of the outer plate 119 forms an inclined surface inclined obliquely downward from the idler wheel toward the rising plate 119A.
  • the inclination of the outer upper plate 119B is the same as that of the upper surface plate 15C of the side frame body 15.
  • the inclination angle is set to be approximately equal.
  • the outer upper plate 119B of the outer plate 119 is inclined obliquely downward from the position of the idler wheel toward the rising plate 119A, and the inner plate 118
  • the height dimension of the outer side plate 119 is set smaller than the height dimension.
  • the space between the outer plate 119 and the upper guide frame 122A is smaller than the closed space 121C formed between the inner plate 118 of the idler wheel bracket 117 and the upper guide frame 121A.
  • the cross-sectional area of the closed space 122 ⁇ / b> C that is formed becomes smaller.
  • the cross-sectional strength of the outer plate 119 is insufficient compared to the cross-sectional strength of the inner plate 118 fixed to the connection flange 116, and the outer plate 119 side is likely to be twisted when the excavator 1 turns. There arises a problem that the stability during running is lowered.
  • the corner portion 119C where the rising plate 119A of the outer plate 119 and the outer upper plate 119B that constitute the idler wheel bracket 117 intersect with the corner portion 15E of the side frame main body 15.
  • a step 123 in the upper and lower directions is formed between them.
  • the dimension L ′ of the stepped portion 123 is smaller than the plate thickness dimension T ′ of the connection flange 116 to which the side frame body 15 and the idler wheel bracket 117 are fixed (L ′ ⁇ T ′).
  • connection flange 116 As a result, the load in the arrow F1 direction acting on the connection flange 116 from the corner corner 15E of the side frame body 15 and the arrow acting on the connection flange 116 from the corner corner 119C of the outer plate 119 constituting the idler wheel bracket 117.
  • the shear stress acting on the connection flange 116 due to the load in the direction indicated by F2 increases, and there arises a problem that the durability of the connection flange 116 decreases.
  • the inner upper plate 18B of the inner plate 18 constituting the idler wheel bracket 17 is inclined obliquely downward from the idler wheel 6 toward the rising plate 18A of the inner plate 18.
  • An inclined surface is formed, and the outer upper plate 19B of the outer plate 19 forms an inclined surface that is inclined obliquely downward from the idler wheel 6 toward the rising plate 19A of the outer plate 19.
  • the height dimension of the inner side board 18 and the height dimension of the outer side board 19 can be set substantially equal, and the inner side board 18 and the outer side board 19 are symmetrical about the idler wheel 6 in the left and right directions. Can be formed.
  • a closed space 22C formed between the inner plate 18 and the upper guide frame 22A of the inner guide 22, and a closed space 23C formed between the outer plate 19 and the upper guide frame 23A of the outer guide 23, Can be formed as a closed space having approximately equal cross-sectional areas. Further, a closed space 22D formed between the inner plate 18 and the lower guide frame 22B of the inner guide 22 and a closed space 23D formed between the outer plate 19 and the lower guide frame 23B of the outer guide 23 are provided. , And can be formed as a closed space having approximately the same cross-sectional area.
  • the cross-sectional strength of the inner plate 18 fixed to the connecting flange 16 and the cross-sectional strength of the outer plate 19 can be made uniform, and when the excavator 1 performs left turn traveling and right turn traveling, It is possible to suppress the twisting of one of the plate 18 and the outer plate 19. Therefore, the durability of the idle wheel bracket 17 can be increased, and the stability of the excavator 1 during travel can be increased.
  • the inner plate 18 and the outer plate 19 of the idler wheel bracket 17 are formed symmetrically in the left and right directions around the idler wheel 6.
  • the plate of the connection flange 16 is provided between the corner portion 19 ⁇ / b> C where the rising plate 19 ⁇ / b> A and the outer upper plate 19 ⁇ / b> B intersect with the corner portion 15 ⁇ / b> E of the side frame body 15.
  • a stepped portion 20 having a dimension L larger than the thickness dimension T can be formed.
  • a load in the direction of arrow F ⁇ b> 1 acts from the corner portion 15 ⁇ / b> E of the side frame body 15 toward the connection flange 16, and the corner portion of the outer plate 19 constituting the idler wheel bracket 17.
  • a load in the direction indicated by arrow F2 is applied from 19C to the connection flange 16, an application point P1 of a load acting on the connection flange 16 from the corner corner 15E and a load acting on the connection flange 16 from the corner corner 19C It is possible to keep the distance (the dimension L of the step portion 20) from the point of action P2 at a large value.
  • connection flange 16 from the corner corner 15E of the side frame body 15 an arrow acting on the connection flange 16 from the corner corner 19C of the outer plate 19 constituting the idler wheel bracket 17 are shown.
  • the shear stress acting on the connection flange 16 due to the load in the direction F2 can be reduced, and the durability of the connection flange 16 can be increased.
  • the case where the upper connecting plate 21 connects the inner upper plate 18B of the inner plate 18 and the outer upper plate 19B of the outer plate 19 constituting the idler wheel bracket 17 is illustrated.
  • the present invention is not limited to this.
  • the upper end of the inner upper plate 18B ′ extends toward the outer plate 19 and the upper end of the outer upper plate 19B ′ extends to the inner plate 18.
  • the upper end portion of the inner upper plate 18B ′ and the upper end portion of the outer upper plate 19B ′ may be fixed to each other at the left and right center portions by means of welding or the like.
  • the hydraulic excavator 1 is described as an example of the tracked vehicle.
  • the present invention is not limited to this, and can be widely applied to other tracked vehicles such as a hydraulic crane.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Body Structure For Vehicles (AREA)

Abstract

L'invention porte sur des véhicules à chenilles. Selon l'invention, la plaque supérieure intérieure (18B) d'une plaque intérieure (18) qui forme un support de roue folle (17) est inclinée obliquement vers le bas en partant du côté de la roue folle (6) vers la plaque remontante (18A) de la plaque intérieure (18). La plaque supérieure extérieure (19B) d'une plaque extérieure (19) est inclinée obliquement vers le bas en partant du côté de la roue folle (6) et en se dirigeant vers la plaque remontante (19A) de la plaque extérieure (19). Le résultat est que la plaque intérieure (18) et la plaque extérieure (19) sont symétriques de part et d'autre de la roue folle (6) dans une direction gauche-droite. La configuration a pour effet que la résistance transversale de la plaque intérieure (18) fixée à un rebord d'assemblage (16) et la résistance transversale de la plaque extérieure (19) sont égales, de sorte que la durabilité du support de roue folle (17) est améliorée.
PCT/JP2011/059007 2010-07-15 2011-04-11 Châssis de chenilles pour véhicule du type à chenilles Ceased WO2012008189A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201190000613.5U CN203127002U (zh) 2010-07-15 2011-04-11 履带式车辆的车体框架

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2010160633A JP2012020677A (ja) 2010-07-15 2010-07-15 装軌式車両のトラックフレーム
JP2010-160633 2010-07-15

Publications (1)

Publication Number Publication Date
WO2012008189A1 true WO2012008189A1 (fr) 2012-01-19

Family

ID=45469203

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2011/059007 Ceased WO2012008189A1 (fr) 2010-07-15 2011-04-11 Châssis de chenilles pour véhicule du type à chenilles

Country Status (3)

Country Link
JP (1) JP2012020677A (fr)
CN (1) CN203127002U (fr)
WO (1) WO2012008189A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2519522A (en) * 2013-10-22 2015-04-29 Strickland Tracks Ltd A track system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104627261B (zh) * 2015-02-15 2017-08-08 徐工集团工程机械股份有限公司 一种插入式履带底盘结构

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61183784U (fr) * 1985-05-10 1986-11-15
JP2002053085A (ja) * 2000-08-08 2002-02-19 Hitachi Constr Mach Co Ltd 建設機械用走行体の遊動輪支持装置
WO2003042022A1 (fr) * 2001-11-13 2003-05-22 Hitachi Construction Machinery Co., Ltd. Chassis pour chenille equipant des engins de chantier

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61183784U (fr) * 1985-05-10 1986-11-15
JP2002053085A (ja) * 2000-08-08 2002-02-19 Hitachi Constr Mach Co Ltd 建設機械用走行体の遊動輪支持装置
WO2003042022A1 (fr) * 2001-11-13 2003-05-22 Hitachi Construction Machinery Co., Ltd. Chassis pour chenille equipant des engins de chantier

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2519522A (en) * 2013-10-22 2015-04-29 Strickland Tracks Ltd A track system
GB2519522B (en) * 2013-10-22 2017-12-13 Strickland Tracks Ltd A chain guard for an undercarriage track system

Also Published As

Publication number Publication date
JP2012020677A (ja) 2012-02-02
CN203127002U (zh) 2013-08-14

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