JP2017007504A - Crawler type vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a caterpillar type vehicle which facilitates a work for engaging a suspender with a caterpillar frame in a crawler type vehicle equipped with a guard member to prevent caterpillars from coming off lower roll wheels.SOLUTION: A caterpillar frame 22 is equipped with lower roll wheels 60 disposed with gaps in forward and rearward directions and a pair of guard members 64 disposed on both sides in a width direction of the lower roll wheels 60. The guard members 64 comprise bottom walls 66 extending in forward and rearward directions and vertical walls 68 extending upward from the inside end in the width direction of the bottom walls 66. The vertical walls 68 have a plurality of high parts 70 and a plurality of low parts 72 that are formed alternately in forward and rearward directions. Each high part 70 is located between adjacent lower roll wheels 60 in the forward and rearward directions. The high part 70 located on one end side of the guard member 64 in forward and rearward directions and the high part 70 located on the other end side in forward and rearward directions keep notches 73 formed to be equipped with attachable and detachable lid plates 86 that block the notches 73.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a crawler-type vehicle equipped with a guard member for preventing the crawler belt from coming off from a lower wheel.

  Patent Document 1 listed below discloses a crawler-type vehicle in which a guard member for preventing the crawler belt from taking off from the downwheel is mounted. This crawler-type vehicle includes a pair of left and right crawler belt frames extending in the front-rear direction at both ends in the width direction. Each crawler belt frame has a drive wheel disposed at one end in the front-rear direction, an idler wheel disposed at the other end in the front-rear direction, and an interval in the front-rear direction between the drive wheel and the idler wheel. A plurality of the under-roller wheels are rotatably mounted, and a guard member for preventing the crawler belt from being removed from the lower roller is mounted. In addition, an endless crawler belt is wound around the drive wheel, the idle wheel, and the downwheel.

  The pair of left and right guard members disposed on both sides in the width direction of the down wheel includes a bottom wall extending in the front-rear direction and a vertical wall extending upward from the inner end in the width direction of the bottom wall. The bottom wall is located above the ground track, and a gap exists between the bottom wall bottom surface and the top surface of the ground track. The vertical wall has a plurality of high portions and a plurality of low portions, and the plurality of high portions and the plurality of low portions are alternately formed in the front-rear direction. Each high portion is located between each lower rolling wheel adjacent in the front-rear direction. A connecting piece extending outward in the width direction is attached to the upper end of each high portion, and each connecting piece and the lower end of the crawler belt frame are fixed by bolts. According to the crawler-type vehicle disclosed in Patent Document 1 below, the grounded crawler track is inclined in the width direction by the bottom wall of the guard member even when the traveling operation is performed on rough terrain such as a mountain forest. Therefore, the crawler belt is prevented from being removed from the downwheel.

  By the way, when a crawler type vehicle is transported, the crawler type vehicle is generally mounted on a transportation means such as a transport vehicle or a ship and transported to a work site or the like. When a crawler-type vehicle is mounted on a transport means, the crawler-type vehicle may be mounted on the transport means by self-propelled. If this is not possible, the crawler-type vehicle is lifted by a crane and transported. Mounted on. When a crawler-type vehicle is lifted, a suspension device such as a wire rope is normally locked to each crawler track frame between the lower rolling wheel at one end in the front-rear direction and the lower rolling wheel at the other end in the front-rear direction (for example, (See Patent Document 2 below.)

JP 2006-103595 A JP 2011-47138 A

  In the crawler type vehicle disclosed in the above-mentioned Patent Document 1, the lower rolling wheels adjacent to each other in the front-rear direction are closed by the high portions of the vertical walls of the guard member. In order to stop, it is necessary to remove the guard member from the track frame. However, since the guard member is formed long from a metal material such as a steel plate, the guard member is heavy, and bolts for fixing the guard member to the crawler belt frame are frequently used. For this reason, detaching the guard member from the crawler belt frame is a heavy burden on the worker, and the operation of locking the suspender on the crawler belt frame is a very time-consuming work.

  The present invention has been made in view of the above-mentioned facts, and a main technical problem thereof is a crawler belt frame in a crawler-type vehicle in which a guard member for preventing the crawler belt from being removed from the downwheel is mounted. It is an object of the present invention to provide a crawler-type vehicle in which an operation for locking a hanging tool is easily performed.

  According to the present invention, as a crawler-type vehicle that solves the above technical problem, it includes a pair of left and right crawler frames extending in the front-rear direction at both ends in the width direction, and each of the pair of crawler frames has one end in the front-rear direction. A drive wheel disposed in the front portion, an idler wheel disposed at the other end portion in the front-rear direction, and a plurality of downturns disposed between the drive wheel and the idler wheel at intervals in the front-rear direction. A wheel is rotatably mounted, and at least a pair of left and right guard members disposed on both sides in the width direction of the lower rolling wheel are mounted, and each of the pair of guard members extends in the front-rear direction. A bottom wall and a vertical wall extending upward from an inner end in the width direction of the bottom wall, the vertical wall having a plurality of high portions and a plurality of low portions, the plurality of high portions and the plurality of low portions The lower portions are alternately formed in the front-rear direction, and each of the high portions is adjacent in the front-rear direction. In a crawler-type vehicle in which a crawler belt is wound around the driving wheel, the idler wheel, and the downwheel, each of the pair of guard members is positioned in the front-rear direction. A cutout is formed in the high portion located on one end side and the high portion located on the other end side in the front-rear direction, and a lid plate for closing the cutout is detachably mounted. A crawler type vehicle is provided.

  Preferably, the notch is non-circular, and a non-circular fitting piece that fits into the notch is attached to the inner surface of the lid plate. A spacer member extending in the width direction is interposed between the high portions positioned on one end in the front-rear direction and between the high portions positioned on the other end in the front-rear direction, and the spacer member positioned on one end in the front-rear direction is interposed. Each of the high portion and the high portion positioned on the other end in the front-rear direction is preferably sandwiched between the lid plate and the spacer member. Locking means are disposed at both ends in the width direction of the spacer member, and locking means for cooperating with the locked means are disposed on the inner surface of the lid plate. It is advantageous that the spacer member is prevented from rotating with respect to the lid plate by being locked by the locking means. The locked means of the spacer member is constituted by a locked piece in which at least a part of the outer edge extends straight, and the locking means of the cover plate protrudes from the inner surface of the cover plate. Preferably, at least a part of the outer edge of the locking ridge extends straight corresponding to the outer edge extending straight of the locked piece.

  In the crawler-type vehicle provided by the present invention, the vertical wall of each guard member has a notch formed in a high portion located on one end in the front-rear direction and a high portion located on the other end in the front-rear direction. Since the cover plate that closes the notch is detachably mounted, only the cover plate, not the entire guard member, is detached, and then the lifting tool is inserted into the notch to lock the lifting tool to the crawler belt frame. Work is done easily.

1 is a side view of a hydraulic excavator constructed according to the present invention. The top view of the base frame of the lower traveling body shown in FIG. The side view of the base frame shown in FIG. AA line sectional view in Drawing 3 of a wheel support part. Sectional drawing which shows the state by which the upper roller and the lower roller were mounted | worn with the wheel support part shown in FIG. The front view of the guard member shown in FIG. The top view of the guard member shown in FIG. BB sectional drawing in FIG. 6 of a guard member. Sectional drawing which shows the state by which the guard member was mounted | worn with the wheel support part shown in FIG. CC sectional view taken on the line CC in FIG. 9 of the guard member. FIG. 11 is a perspective view of the lid plate shown in FIGS. 9 and 10. The perspective view of the spacer member shown in FIG.9 and FIG.10. The perspective view which shows the modification of a guard member.

  Hereinafter, embodiments of a crawler type vehicle according to the present invention will be described in detail with reference to the accompanying drawings, taking a hydraulic excavator as a typical crawler type vehicle as an example.

  A description will be given with reference to FIG. A hydraulic excavator generally indicated by reference numeral 2 includes a lower traveling body 4 capable of self-propelling, an upper swing body 6 mounted on the lower traveling body 4, and a working arm device rotatably mounted on the upper swing body 6. 8 is roughly constituted. On the revolving frame 10 that forms the framework structure of the upper revolving structure 6, the cab 12 on which the operator is boarded, the equipment accommodating chamber 14 in which various equipment such as an engine and a hydraulic pump are accommodated, and the working arm device 8 are provided. A counterweight 16 for balancing the weight is mounted.

  This will be described with reference to FIGS. 2 and 3, the base frame generally designated by reference numeral 18 forms a framework structure of the lower traveling body 4, and a plurality of appropriate metal materials such as steel plates are joined together by welding or the like. Can be formed. The base frame 18 includes a car body 20 and a pair of crawler belt frames 22. The car body 20 has a cylindrical mounting portion 24 on which a turning device (not shown) is interposed so that the upper turning body 6 is rotatably mounted, and radially outward from the outer peripheral surface of the cylindrical mounting portion 24. And an extending portion 26 that extends. As shown in FIG. 2, the extending part 26 of the car body 20 extends in four directions at intervals in the circumferential direction, and is formed in an X shape when viewed from above. Each crawler belt frame 22 bonded to two adjacent ends in the circumferential direction among the four extended ends of the extending portion 26 extends straight in a direction connecting the two extended ends bonded. Yes. In the present specification, the longitudinal direction of the crawler belt frame 22 will be described as the front-rear direction, and the direction connecting the crawler belt frames 22 will be described as the width direction (left-right direction).

  As shown in FIGS. 2 and 3, each crawler belt frame 22 includes a wheel support portion 28 extending in the front-rear direction, a driving device support portion 30 joined to one end portion in the front-rear direction of the wheel support portion 28, and a roller support portion 28. And an idler wheel support portion 32 joined to the other end portion in the front-rear direction of the wheel support portion 28. As is understood by referring to FIG. 1 together with FIGS. 2 and 3, the driving device support 30 is provided with a traveling motor 34 and is driven to an outward position facing the traveling motor 34 in the width direction. A ring 36 is rotatably mounted. An idler wheel 38 is rotatably attached to the idler wheel support portion 32.

  This will be described with reference to FIGS. 4 and 5 together with FIGS. As shown in FIG. 4, the wheel support portion 28 joined to the extending end of the extending portion 26 of the car body 20 includes a vertical inner wall 40 that extends substantially vertically and an upper end of the vertical inner wall 40. An inclined inner wall 42 inclined and extending outward in the width direction upward, an upper wall 44 extending inclined downward from the upper end of the inclined inner wall 42 toward the outer side in the width direction, and an upper wall 44 and an outer wall 46 extending downward from the outer end in the width direction. The roller support portion 28 is joined to the extending end of the extending portion 26 of the car body 20 at the upper end of the vertical inner wall 40 and the upper end of the inclined inner wall 42. A mounting piece 48 extending upward is joined to the outer surface of the inclined inner side wall 42. As is understood by referring to FIG. 2 and FIG. 3 together with FIG. 4, two mounting pieces 48 are disposed on the outer surface of the inclined inner side wall 42 at intervals in the front-rear direction. As shown in FIG. 5, the upper wheel 50 is rotatably mounted on each mounting piece 48.

  Continuing with reference to FIG. 5, an inner piece 52 extending in the front-rear direction is joined to the lower end of the vertical inner wall 40. An outer piece 54 extending in the front-rear direction is joined to the lower end of the outer side wall 46. A bearing 56 is fixed to the lower surface of the inner piece 52 and the lower surface of the outer piece 54 with bolts 58. A lower roller 60 is rotatably mounted on each bearing 56 fixed at a position facing in the width direction. Here, as will be understood by referring to FIG. 1, a plurality of lower rollers 60 are mounted on the crawler belt frame 22 at intervals in the front-rear direction, and nine in the illustrated embodiment. An endless crawler belt 62 is wound around the drive wheel 36, the idler wheel 38, each upper roller 50, and each lower roller 60. Further, a pair of left and right guard members 64 (only one side is shown) for preventing the crawler belt 62 from coming off from each lower roller 60 are disposed on both sides in the width direction of each lower roller 60. Has been.

  This will be described with reference to FIGS. The guard member 64 that can be formed of a metal material such as a steel plate includes a bottom wall 66 extending in the front-rear direction and a vertical wall 68 extending upward from the inner end in the width direction of the bottom wall 66. In the illustrated embodiment, the bottom wall 66 and the vertical wall 68 are each composed of one plate-like member. As shown in FIG. 6, the vertical wall 68 has a plurality of high portions 70 and a plurality of low portions 72. The plurality of high portions 70 and the plurality of low portions 72 are alternately formed in the front-rear direction. The upper end of each low portion 72 is curved downward. It is important that a notch 73 is formed in the high portion 70 located on one end in the front-rear direction and the high portion 70 located on the other end in the front-rear direction. In the illustrated embodiment, a notch 73 is formed in the high portion 70 located at one end in the front-rear direction and the high portion 70 located at the other end in the front-rear direction. The high portion 70 in which the notch 73 is formed is the second to third counting from one end in the front-rear direction, depending on the front-rear direction dimension of the guard member 64, the front-rear direction dimension of the excavator 2 to which the guard member 64 is mounted, and the like. May be the second to third high portions 70 counted from the other high portion 70 and the other end in the front-rear direction. The cutout 73, which is preferably non-circular, is formed in a rectangular shape in the illustrated embodiment.

  A connecting piece 74 is joined to the outer side surface of each high portion 70 in the width direction. The connection piece 74 includes a connection portion 76 that extends outward in the width direction from the upper end of the high portion 70, and a pair of ribs 78 that extend downward from both front and rear ends of the connection portion 76. As shown in FIGS. 7 and 8, each connection portion 76 is formed with a circular opening 80. As shown in FIG. 9, each guard member 64 is fixed to the lower surface of the inner piece 52 of the crawler belt frame 22 and the lower surface of the outer piece 54 by bolts 82 at the connection portions 76 of the connection pieces 74. As understood by referring to FIG. 1, in a state where the guard member 64 is mounted on the crawler belt frame 22, each low portion 72 is positioned below each lower wheel 60 in the front-rear direction, and each high portion 70. Is located between the respective lower rolling wheels 60 adjacent in the front-rear direction.

  In the excavator 2 configured according to the present invention, the notch 73 is formed in the high portion 70 at a predetermined position as described above, and the notch 73 is formed as shown in FIGS. 9 and 10. It is important that a lid plate 86 that closes the notch 73 is detachably attached to the high portion 70 that is provided. It is preferable that a non-circular fitting piece that fits into the notch 73 is attached to the inner surface of the lid plate 86. In the illustrated embodiment, as shown in FIGS. 9 to 11, a rectangular fitting piece 88 formed corresponding to the notch 73 is joined to the inner surface of the lid plate 86. A circular through opening 90 is formed in the lid plate 86 and the fitting piece 88.

  As shown in FIG. 9, a hollow spacer member 92 is interposed between the guard members 64 fixed to the inner piece 52 and the outer piece 54 of the crawler belt frame 22. Then, the bolt 94 inserted from one side into the through-opening 90 and the hollow member 92 between the cover plate 86 and the fitting piece 88 is screwed with the nut 96 disposed on the other side, whereby each guard member 64 is The lid plate 86 is fixed to the high portion 70 while being connected to each other. In the illustrated embodiment, when the lid plate 86 is fixed to the high portion 70, the lid plate 86 is prevented from rotating with respect to the guard member 64 by fitting the fitting piece 88 into the notch 73. Is done.

  When the lid plate 86 is fixed to the high portion 70, the high portion 70 in which the notch 73 is formed is preferably sandwiched between the lid plate 86 and the spacer member 92. In the illustrated embodiment, as shown in FIG. 12, the spacer member 92 includes a cylindrical portion 98 extending in the width direction, and a pair of rectangular locked pieces 100 disposed at both axial ends of the cylindrical portion 98. It consists of and. The locked piece 100 is formed with a circular opening 102 continuing from the inside of the cylindrical portion 98. As shown in FIG. 10, the front-rear direction dimension L1 of the locked piece 100 is formed larger than the front-rear direction dimension L2 of the notch 73 (L1> L2). The front-rear dimension L3 of the cover plate 86 is also formed larger than the front-rear dimension L2 of the notch 73 (L3> L2). Moreover, as shown in FIG. 9, the thickness dimension T1 of the fitting piece 88 of the cover plate 86 is formed smaller than the thickness dimension T2 of the vertical wall 68 (T1 <T2). In the illustrated embodiment, when the lid plate 86 is fixed to the high portion 70, the high portion 70 in which the notch 73 is formed is formed on the inner surface of the lid plate 86 and the latched piece of the spacer member 92. 100 is sandwiched between the outer surfaces. As a result, the rigidity of each guard member 64 is enhanced by firmly connecting each guard member 64. Therefore, even when an external force is applied to the guard member 64 due to, for example, a rock colliding with the guard member 64 while the hydraulic excavator 2 is traveling, deformation of the guard member 64 is suppressed. It should be noted that the cylindrical portion 98 of the spacer member 92 can be replaced with a solid member such as a columnar member in which female screws are formed at both ends in the axial direction, instead of a hollow member. In this case, the circular opening 102 of the locked piece 100 is disposed to face the female screw of the solid member in the width direction. Then, the guard member 64 is fixed to the spacer member together with the cover plate 86 by bolts, whereby the guard members 64 are connected to each other and the cover plate 86 is fixed to the high portion 70.

  When each guard member 64 is attached to the crawler belt frame 22, a spacer is interposed between the high portions 70 not formed with the notches 73 and opposed in the width direction, and the bolt 94 and the nut 96 are used in the width direction. The opposing high portions 70 are preferably connected to each other. The spacer may be composed of the spacer member 92 or may be composed of only a cylindrical member. Or the spacer may be comprised from the cylindrical member in which the internal thread was formed in the axial direction both ends. In this case, each high part 70 which opposes in the width direction is fixed to the spacer comprised from the cylindrical member with the volt | bolt. In the illustrated embodiment, as shown in FIG. 6, a circular opening 104 through which a bolt is inserted is formed in each high portion 70 where the notch 73 is not formed.

  The spacer member 92 is advantageously provided with latching means at both ends in the width direction, and the lid plate 86 is provided with latching means for cooperating with the latching means. In the illustrated embodiment, the locked means of the spacer member 92 is constituted by a locked piece 100. The outer edge of the lower end of the locked piece 100 extends straight. On the other hand, in the illustrated embodiment, the locking means of the cover plate 86 is constituted by a locking protrusion 106 protruding from the inner surface of the fitting piece 88 as shown in FIG. The upper surface of the locking protrusion 106 extends straight corresponding to the lower edge of the locked piece 100. As shown in FIG. 9, when the cover plate 86 is fixed to the high portion 70, the lower end of the locked piece 100 of the spacer member 92 is locked to the upper surface of the locking protrusion 106 of the cover plate 86. Thus, the spacer member 92 is prevented from rotating with respect to the lid plate 86.

  When a lifting device such as a wire rope is locked to the hydraulic excavator 2 as described above, the fastening of the bolt 94 and the nut 96 is released at one end in the front-rear direction of each guard member 64 in the crawler belt frame 22 on one side, Next, after the cover plate 86 and the spacer member 92 are detached, a hanging tool such as a wire rope is inserted into each notch 73 and the hanging tool is locked to the crawler belt frame 22. The above-described release of fastening of the bolt 94 and nut 96, removal of the cover plate 86 and spacer member 92, and insertion and locking of the suspension are also performed on the other end side in the front-rear direction of each guard member 64 in the crawler belt frame 22 on one side. In addition, it is also performed on one end side in the front-rear direction and the other end side in the front-rear direction of each guard member 64 in the crawler belt frame 22 on the other side. Then, the excavator 2 in which the lifting tool is locked at four positions on one end side and the other end side of each crawler belt frame 22 is lifted by a crane and mounted on a transport means such as a transport vehicle or a ship. Therefore, in the hydraulic excavator 2 configured according to the present invention, the hook is locked to the crawler belt frame 22 without detaching the entire guard member 64 from the crawler belt frame 22 when the hook is locked to the crawler belt frame 22. Work is done.

  In the embodiment as described above, the example in which the guard member 64 is provided as a pair on the left and right sides on the both sides in the width direction of the lower roller 60 has been described. The guard member may be divided into a plurality of parts in the front-rear direction. For example, the front guard member 202 and the rear guard member 204 may be configured like a guard member generally indicated by reference numeral 200 in FIG.

  Moreover, in embodiment as above-mentioned, although the example where the vertical wall 68 of the guard member 64 was comprised from one plate-shaped member was demonstrated, the vertical wall of a guard member has several plate-shaped members. You may be comprised from. For example, as shown in FIG. 13, the bottom wall 206 of the guard member 200 has a plurality of wide portions 208 and a plurality of narrow portions 210, and the plurality of wide portions 208 and the plurality of narrow portions 210 are defined as follows. The guard members 200 are alternately formed in the front-rear direction, and the vertical wall of the guard member 200 extends from the inner end in the width direction of each of the wide portions 208 and from the inner end in the width direction of each of the narrow portions 210. You may be comprised from the several low part component piece 214 extended upwards.

2: Excavator (crawler type vehicle)
22: crawler belt frame 36: drive wheel 38: idler wheel 60: downwheel 62: crawler belt 64: guard member 66: bottom wall 68: vertical wall 70: high part 72: low part 73: notch 86: cover plate 88: Fitting piece 92: Spacer member 100: Locked piece 106: Locking protrusion

Claims (5)

It has a pair of left and right crawler belt frames extending in the front-rear direction at both ends in the width direction. Each of the pair of crawler belt frames is provided with a drive wheel disposed at one end portion in the front-rear direction and disposed at the other end portion in the front-rear direction. And a plurality of downwheels arranged at intervals in the front-rear direction between the driving wheel and the idler wheel, and a width direction of the downwheel. At least a pair of left and right guard members disposed on both sides are mounted,
Each of the pair of guard members includes a bottom wall extending in the front-rear direction and a vertical wall extending upward from an inner end in the width direction of the bottom wall. The vertical wall includes a plurality of high portions and a plurality of low walls. The plurality of high portions and the plurality of low portions are alternately formed in the front-rear direction, and each of the high portions is located between each of the lower rollers adjacent in the front-rear direction. And
In a crawler-type vehicle in which a crawler belt is wound around the drive wheel, the idler wheel, and the downwheel,
A notch is formed in the high portion located on one end in the front-rear direction and the high portion located on the other end in the front-rear direction of each of the pair of guard members, and a lid plate that closes the notch is attached and detached. A crawler type vehicle characterized by being freely mounted.   The crawler-type vehicle according to claim 1, wherein the notch is non-circular, and a non-circular fitting piece that fits into the notch is attached to an inner surface of the lid plate.   A spacer member extending in the width direction is interposed between the high portions positioned on one end in the front-rear direction and between the high portions positioned on the other end in the front-rear direction, and the spacer member positioned on one end in the front-rear direction is interposed. The crawler-type vehicle according to claim 1 or 2, wherein each of the high portion and the high portion positioned at the other end in the front-rear direction is sandwiched between the lid plate and the spacer member.   Locking means are disposed at both ends in the width direction of the spacer member, and locking means for cooperating with the locked means are disposed on the inner surface of the lid plate. The crawler-type vehicle according to claim 3, wherein the spacer member is prevented from rotating with respect to the lid plate by being locked by the locking means.   The locked means of the spacer member is constituted by a locked piece in which at least a part of the outer edge extends straight, and the locking means of the cover plate protrudes from the inner surface of the cover plate. The crawler-type vehicle according to claim 4, wherein at least a part of the outer edge of the locking ridge extends straight corresponding to the outer edge extending straight of the locked piece. .