JP5094590B2 - Truck loader - Google Patents

Description

    The present invention relates to a truck loader.

Conventionally, the base side of a pair of left and right booms is supported at the rear of the body frame so that the front end side of the boom moves up and down on the front side of the body frame. There is a pair of left and right boom cylinders that move the boom up and down between the rear part and a cabin mounted on the body frame (for example, Patent Document 1).
In this type of conventional track loader, the body frame is provided with an upper frame and a lower frame as separate bodies, a pair of left and right support frames on the rear side and an upper side wall are integrally provided on the upper frame, and a bottom is provided on the lower frame. Provided integrally with the wall and the pair of left and right lower side walls, and the upper frame and the lower frame are fixed to each other with a bolt and nut or the like to form an airframe frame. While supporting the base side so that rocking is possible, the lower base end part of a pair of left and right boom cylinders was connected so that rocking was possible (for example, patent documents 1).
USP 6098739

  Conventionally, the upper frame and the lower frame of the fuselage frame are configured separately, and the upper frame and the lower frame are fixed to each other with a fastener such as a bolt and nut to form the fuselage frame. Ensuring the overall strength was disadvantageous, loosening fasteners such as bolts and nuts, and damage to the mounting holes for inserting the bolts. In addition, there is a problem that extra man-hours for fastening the bolts are required when assembling the fuselage frame.

  In view of the above problems, the present invention is advantageous in securing the strength of the entire body frame, and there is no need to worry about loosening of fasteners such as bolts and nuts or damage to the mounting holes for inserting bolts. At a minimum, the entire body frame can be easily manufactured.

The technical means of the present invention for solving this technical problem is that a cabin is mounted on a body frame supported by a left and right traveling device, booms are provided on both the left and right sides of the body frame and the cabin, and the front end side of the boom is the body frame. The base side of each of the left and right booms is supported by the rear part of the fuselage frame via the first lift link on the rear side and the second lift link on the front side so as to move up and down on the front side. A boom cylinder that moves the boom up and down is provided between the rear of the fuselage frame,
The fuselage frame includes a frame body having left and right side walls, and a pair of left and right support frames connected to the rear end side of the frame body, each of the left and right support frame bodies having an inner wall and an outer wall, and the front side The lower part is fixed to the upper surface side of the mounting plate fixed to the rear end upper part of the left and right side walls of the aircraft frame ,
The lower base portion of the first lift link is pivotally supported by the support frame body via the first link support shaft, and the second base of the second lift link is secondly attached to the stay member fixed to the upper front end portion of the support frame body. The upper edge of the front part of the outer wall of the support frame is located below the second link spindle, and is pivotally supported via the link spindle .

According to another technical means of the present invention, the upper portions of the inner side walls of the left and right support frames are connected to each other by a horizontal connecting member, and the second link support shaft is in front of the horizontal connecting member and the back wall of the cabin. It is in the point supported by the inner wall and the stay member in the vicinity .

According to another technical means of the present invention, the upper end of the rear end of each of the left and right side walls is inclined downward so as to gradually move downward as it goes rearward, and the mounting plate is formed into a T shape or an L shape. It is fixed so that it intersects, and the outer part of this mounting plate protrudes outward from the upper end of the side wall,
Each of the left and right side walls is provided with a bent edge protruding outward in the left-right direction at the upper end on the front side from the rear end, and the rear end of the bent edge is fixed to the front end of the mounting plate. A fender that covers the upper side and the rear side of the traveling device is configured with the curved portion and the outer portion of the mounting plate,
The frame body has a front wall at the front end of the left and right side walls, a bent edge projecting backward is provided at the upper end of the front wall, and connecting pieces are provided on both the left and right sides of the bent edge to project rearward. piece is Ru near point that is fixed to the front end of the bent edge portion of the side wall.

Another technical means of the present invention is that the base side of a pair of left and right booms whose tip side is raised and lowered on the front side of the body frame is supported on the rear part of the body frame supported by the left and right traveling device so as to freely swing up and down. In a truck loader provided with a boom cylinder for moving the boom up and down between the base side of the boom and the rear part of the body frame,
The fuselage frame includes a frame main body having left and right side walls and a pair of left and right support frames connected to the rear end side of the frame main body, and the base side of the boom is swingably supported by the left and right support frame bodies. The lower base end of the boom cylinder is connected,
Each of the left and right support frames is fixed to the upper surface side of the mounting plate whose front lower portion is fixed to the upper rear end portion of the left and right side walls of the aircraft frame,
On the fuselage frame, the engine is mounted on the rear side, the cabin is mounted on the front side, the mounted state where the bottom side of the cabin is placed on the fuselage frame, and the fall where the bottom side of the cabin is spaced upward from the fuselage frame Is supported so that it can swing freely.
The cabin includes a pair of left and right side walls, a back wall that closes the back side of the cabin, and a bottom wall that is connected between the lower ends of the left and right side walls and has a driver seat.
A partition plate is provided in the frame body for partitioning the front side and the rear side of the fuselage frame and contacting the bottom wall of the mounted cabin from above.
The partition plate, the bottom wall body of the cabin, and the back wall body of the cabin are configured to shield the front side of the back wall body of the cabin and the front side of the body frame from the rear side of the body frame on which the engine is mounted. There is in point.

According to the present invention, the machine frame includes a frame body having a left right side wall, a pair of left and right support frame member connected to the rear end side of the frame body, the right and left support frame is aircraft front lower frame Since it is fixed to the upper surface side of the mounting plate fixed to the upper rear end of the left and right side walls, the frame body and the left and right support frame can be formed integrally with the mounting plate, ensuring the strength of the entire body frame Is advantageous. Further, it requires less assembly steps of the machine body frame, so that the entire body frame can be easily manufactured.

Further, Ri by the to mediate the mounting plate between the inner wall and the outer wall of the rear end portion upper end of the side wall of the frame body supporting frame, the supporting frame to the rear end upper end of the side wall of the frame body The inner wall and the outer wall can be firmly connected and fixed, and the frame body and the support frame can be easily integrated.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 and 2, the truck loader according to the present invention includes a body frame 1, a loader work device (excavation work device) 2 attached to the body frame 1, and a pair of left and right traveling devices 3 that support the body frame 1. The cabin 4 is mounted on the front side of the body frame 1.
3 to 6, the body frame 1 is constituted by an iron plate or the like. The body frame 1 includes a frame body 9 having a bottom wall 6, a pair of left and right side walls 7, and a front wall 8, and a pair of left and right support frame bodies 11. The pair of left and right support frame bodies 11 are connected to the rear end side of the frame body 9 by welding, and the frame body 9 has an open upper end having a bottom wall 6, a pair of left and right side walls 7, and a front wall 8. It is formed in a box shape. The upper edges of the rear end portions of the pair of left and right side walls 7 are formed in a circular arc shape and are inclined downwardly so as to gradually move downward as going backward. A bent edge portion 7 a protruding outward in the left-right direction is provided at the upper ends of the pair of left and right side walls 7. A bent edge portion 8a projecting rearward is provided at the upper end of the front wall 8, and connecting pieces 8b are provided to protrude outwardly on both left and right sides of the bent edge portion 8a, and each connecting piece 8b is a pair of left and right side walls. 7 are welded to the front ends of the bent edge portions 7a.

The pair of left and right support frames 11 are formed in a U shape having an inner wall 12, an outer wall 13, and a connecting wall 14 that connects the rear end of the inner wall 12 and the rear end of the outer wall 13. Yes.
A mounting plate 16 that is curved in an arc shape is arranged at the upper end of the rear end of the side wall 7 so as to cross the side wall 7 in a T-shape or L-shape, and is fixed by welding. The front end portion of the mounting plate 16 is superposed and fixed to the rear end portion of the bent edge portion 7a of the side wall 7 by welding. The outer side of the mounting plate 16 protrudes outward from the upper end of the side wall 7, and the bent edge 7 a of the side wall 7 and the mounting plate 16 constitute a fender 17 that covers the upper side and the rear side of the traveling device 3. Yes. The front side lower ends of the inner side wall 12 and the outer side wall 13 of the pair of left and right support frame bodies 11 are fixed to the mounting plate 16 by welding, respectively, so that the pair of left and right support frame bodies 11 are attached to the body frame 1 via the mounting plate 16. Each side wall 7 is connected and fixed. The upper portions of the inner side wall 12, the outer side wall 13, and the connecting wall 14 of the pair of left and right support frame bodies 11 protrude upward from the side wall 7.

  The upper portions of the inner side walls 12 of the pair of left and right support frame bodies 11 are connected by a horizontal connecting member 19. The horizontal connecting member 19 includes a gate-shaped front wall plate 20 and an upper wall plate 21 protruding rearward from the upper end of the front wall plate 20, and a rear portion 21 a of the upper wall plate 21 is inclined downward and downward. . A pair of left and right support brackets 22 project upward from the left and right ends of the upper wall plate 21 of the horizontal connecting member 19. Each of the pair of left and right support brackets 22 has a pair of left and right support plates 23, and a front mounting hole 24 and a rear locking hole 25 penetrating left and right are provided in each support plate 23.

A pair of left and right support bases 26 projecting upward is provided in the middle of the rear side of the bottom wall 6 of the frame body 9. A connection reinforcing plate 27 is provided at the rear end of the frame body 9 so as to follow the rear end of the bottom wall 6. The connection reinforcing plate 27 is connected and fixed to the pair of left and right support frame bodies 11 by welding, and is fixed to the rear end portion of the bottom wall 6 of the frame body 9 by welding. The lower ends of the pair of left and right support frame bodies 11 are connected by a connection reinforcing plate 27 and a lower connection plate 28. The connection reinforcing plate 27 and the lower connection plate 28 are fixed to each other by welding, the connection reinforcing plate 27 is connected and fixed to the bottom wall 6 of the body frame 1 by welding, and both ends of the connection reinforcing plate 27 and the lower connection plate 28 are The pair of support frame bodies 11 are fixed to the inner wall 12 or the connection wall 14 by welding, respectively. The pair of left and right support frame bodies 11 are connected to the bottom wall 6 via a connection reinforcing plate 27 and a lower connection plate 28. Yes.

  A first mounting boss 32 having a mounting hole is provided between the inner side wall 12 and the outer side wall 13 at the rear upper ends of the pair of left and right support frame bodies 11. A stay member 34 projects rearwardly from the upper front end of the outer wall 13 of the pair of left and right support frames 11, and a second mounting boss 36 having a mounting hole is provided between the stay member 34 and the inner wall 12. . A third mounting boss 38 having a mounting hole is provided between the inner wall 12 and the outer wall 13 at the lower end of the pair of left and right support frames 11.

As shown in FIGS. 1 and 2, a lid member 40 that closes the rear end opening between the pair of left and right support frame bodies 11 is provided at the rear end portion of the body frame 1 so as to be freely opened and closed.
1 to 4, the cabin 4 (driver protection device) includes a pair of left and right side frame members 42, a roof member 41 laid between the upper portions of the side frame members 42, and a pair of left and right side frame members 42. A pair of left and right side wall bodies 43 attached to each other, a back wall body 51 for closing the back side of the cabin 4, and a bottom wall body 58 connected between the lower end portions of the pair of side wall bodies 43 are provided.

  The pair of left and right side frame members 42 are made of a pipe material or the like, and include a pair of left and right front struts 44, a pair of left and right rear struts 45, the upper ends of the corresponding front struts 44 and the upper ends of the rear struts 45. And a pair of left and right upper horizontal beam portions 46 are connected to each other. A pair of left and right mounting brackets 47 project rearward from the lower end portions of the left and right rear struts 45. The pair of left and right mounting brackets 47 correspond to the support bracket 22 of the body frame 1, and mounting holes and locking holes are provided corresponding to the mounting holes 24 and the locking holes 25 of the support bracket 22. . A mounting plate 50 is fixed to the lower ends of the left and right front support columns 44 by welding or the like.

The pair of side wall bodies 43 are made of a metal plate or the like, and are fixed to the pair of side frame members 42 by welding. Each side wall body 43 is provided with a large number of insertion holes 52 through which the outer boom 77 or the loader working device 2 can be seen.
The cabin 4 is supported by the support bracket 22 of the machine body frame 1 via a mounting bracket 47 so as to be swingable around a support shaft 55 in the left-right direction. Thereby, the mounting state where the bottom side of the cabin 4 is placed on the body frame 1 so as to block the upper end opening of the body frame 1, and the bottom side of the cabin 4 is spaced upward from the body frame 1 and the upper end of the body frame 1. The posture can be freely changed to a lying state where the opening is opened. When the cabin 4 is swung to the front side around the support shaft 55, the placing plate 50 is placed in contact with the bent edge portion 8a of the front wall 8 through a cushioning material or the like, and thereby the cabin 4 is placed. Is configured to hold. Further, when the cabin 4 swings backward around the support shaft 55 and falls down, the engagement holes of the pair of mounting brackets 47 and the engagement holes 25 of the pair of support brackets 22 coincide with each other. By inserting the locking pin 56 into the cabin, the cabin 4 can be held in a lying state swinging backward. The cabin 4 is swingably supported with respect to the body frame 1.

When the cabin 4 is placed, the truck loader travels and works by the loader working device 2 are performed. When the cabin 4 is placed in a lying state, maintenance and the like in the body frame 1 are performed.
A bottom wall body 58 is connected and fixed between the lower end portions of the pair of left and right side wall bodies 43 in the longitudinal direction by welding or the like. The bottom wall body 58 is formed of a metal plate or the like, has a bottom wall portion 59 and a pair of left and right side wall portions 60 in a U-shape, and a pair of left and right mountings projecting outward at the upper ends of the pair of side wall portions 60. A piece is provided, and the bottom wall body 58 is fixed to the lower end portions of the pair of side wall bodies 43 by welding via a pair of attachment pieces. A driver seat 63 is provided on the bottom wall portion 59 of the bottom wall body 58, and the driver seat 63 is disposed in front of the back wall body 51.

A window frame 65 is provided on the upper side of the back wall 51 of the cabin 4. The window frame 65 is fixed by welding or the like between the rear struts 45 of the pair of left and right side frame members 42 of the cabin 4, and the rear glass 66 is attached to the window frame 65.
Therefore, the upper side of the cabin 4 is closed by the roof member 41, the side is closed by the pair of side wall bodies 43, the rear side is closed by the back wall body 51, and the lower front-rear central portion is the bottom wall body. It is closed by 58 and is formed in a box shape whose front is open.

As shown in FIGS. 3 and 4, a lower back wall 113 is provided on the lower side of the back wall body 51 of the cabin 4, and the lower back wall 113 is disposed below the window frame body 65.
1 and 2, the pair of left and right traveling devices 3 includes a pair of front and rear driven wheels 68 and a drive wheel 69 and a track frame 73 disposed between the pair of driven wheels 68, and a pair of left and right traveling devices. The track frame 73 is configured separately from the body frame 1 and attached to the pair of left and right side walls 7 of the frame body 9 by fasteners such as bolts. The pair of left and right traveling devices 3 are constituted by a crawler traveling device in which a crawler 70 is wound around a driven wheel 68 and a driving wheel 69, and the driving wheel 69 is rotated around the driving shaft 71 by the rotation of the driving shaft 71. The device 3 is driven. The pair of driven wheels 68 are supported at both front and rear ends of the track frame 73 so as to be freely rotatable about the horizontal axis, and one of the pair of driven wheels 68 is urged in a tension adjusting direction by a tension adjusting mechanism (not shown). Yes. A plurality of rolling wheels 72 are provided between the pair of driven wheels 68, and each of the plurality of rolling wheels 72 is supported by the track frame 73 so as to be freely rotatable around the horizontal axis. The drive shaft 71 of the traveling device 3 is disposed below the rear end portion of the cabin 4.

  1, 2, and 6, the front end portion and the rear end portion of the track frame 73 of the pair of left and right traveling apparatuses 3 are attached to the outer side of the pair of left and right side walls 7 of the body frame 1 via a mounting plate 84. And a pair of left and right front reinforcing plates 75 and a pair of left and right rear reinforcing plates 76 corresponding to the fixing positions of the track frame 73 on the inner surface side of the pair of left and right side walls 7 of the body frame 1. Each is superposed by welding.

  The pair of left and right front reinforcing plates 75 have an upright wall 75 a that overlaps the inner surface of the side wall 7 and a lower wall 75 b that overlaps the upper surface of the bottom wall 6 in an L shape. The lower walls 75b of the pair of left and right front reinforcing plates 75 are spaced apart from each other left and right, and a space between the pair of lower walls 75b of the bottom wall 6 of the frame body 9 serves as a discharge path for dust and hydraulic oil. Similarly to the front reinforcing plate 75, the pair of left and right rear reinforcing plates 76 has an upright wall 76 a that overlaps the inner surface of the side wall 7 and a lower wall 76 b that overlaps the upper surface of the bottom wall 6 in an L shape. .

Each of the pair of left and right traveling devices 3 has a hydraulic traveling motor 74, and the driving shaft 71 is rotationally driven by the traveling motor 74. 69 rotates around the drive shaft 71, whereby each traveling device 3 is driven by the traveling motor 74.
As shown in FIGS. 3 and 6, the frame body 9 is provided with a partition plate 80 that partitions the front side and the rear side of the body frame 1. The partition plate 80 is detachably disposed between the pair of left and right side walls 7 of the frame body 9.

  A seal member (not shown) is attached to an upper edge portion or the like of the partition plate 80, and the bottom wall body 58 of the cabin 4 attaches the seal member to the partition plate 80 from the upper side when the cabin 4 swings to the placement state. The rear wall of the cabin 4 from the rear side of the body frame 1 on which the engine 101 described later is mounted by the partition plate 80, the bottom wall body 58 of the cabin 4, and the back wall body 51 of the cabin 4. The front side of the body 51 and the front side of the body frame 1 are configured to be shielded.

In front of the partition plate 80 of the fuselage frame 1, a step 83 is provided for the driver sitting on the driver's seat 63 of the cabin 4 to put his / her foot on.
As shown in FIGS. 1 and 2, the loader working device 2 includes a pair of left and right booms 77 and a bucket 78 (working tool) attached to the tip of the boom 77.
The pair of left and right booms 77 are arranged on both the left and right sides of the body frame 1 and the cabin 4, and the left and right booms 77 are connected to each other by a cylindrical boom connecting body in the middle part of the front part.

  The pair of left and right booms 77 are supported on the rear upper part of the body frame 1 so that the base side of the boom 77 can swing up and down via a first lift link 81 on the rear side and a second lift link 82 on the front side. The front end side moves up and down on the front side of the body frame 1. A pair of left and right boom cylinders 79 each including a double-acting hydraulic cylinder are provided between the base side of the pair of left and right booms 77 and the rear lower part of the body frame 1.

  The lower base end portion of the first lift link 81 is inserted between the inner wall 12 and the outer wall 13 corresponding to the first mounting boss 32 of the body frame 1, and the first link support shaft 85 is the first mounting. The lower base end of the first lift link 81 is inserted into the mounting hole of the boss 32 and the lower base end of the first lift link 81 so that the body frame 1 (the first mounting boss 32). The first link support shaft 85 is supported so that it can swing back and forth.

  The front base end portion of the second lift link 82 is inserted between the stay member 34 corresponding to the second mounting boss 36 of the body frame 1 and the inner wall 12, and the second link support shaft 86 is connected to the second mounting boss. 36 and through the front base end of the second lift link 82, the front base end of the second lift link 82 is inserted into the body frame 1 (second mounting boss 36). The first link support shaft 85 is supported in a vertically swingable manner around the second link support shaft 86 in front of the one link support shaft 85.

The base side of the boom 77 is supported on the upper free end of the first lift link 81 so as to be swingable up and down around the first boom support shaft 88, and the base side of the boom 77 is connected to the rear free end of the second lift link 82. The first boom support shaft 88 is supported in a vertically swingable manner around the second boom support shaft 89 on the front side.
The lower base end portion of the boom cylinder 79 is inserted between the inner wall 12 and the outer wall 13 corresponding to the third mounting boss 38 of the fuselage frame 1, and the lower cylinder support shaft 91 is connected to the third mounting boss 38. By being inserted through the mounting hole and into the lower base end portion of the boom cylinder 79, the lower base end portion of the boom cylinder 79 is connected to the body frame 1 so as to be swingable around the lower cylinder support shaft 91. ing. The upper end of the boom cylinder 79 is connected to the base of the boom 77 so as to be swingable about the upper cylinder support shaft 92.

Thus, the pair of left and right booms 77 are supported on the rear upper part of the body frame 1 so that the base side of the boom 77 can swing up and down via the first lift link 81 on the rear side and the second lift link 82 on the front side. The pair of left and right booms 77 are moved up and down by the expansion and contraction of the left and right boom cylinders 79, and the tip end side of the boom 77 is moved up and down on the front side of the body frame 1.
3 to 5, an engine 101 is provided on the rear side of the bottom wall 6 of the body frame 1. A flywheel 104 is attached to the front end side of the engine 101, and the left and right central portion on the rear side of the engine 101 is placed and fixed on the connection reinforcing plate 27 via the vibration isolation member 99. Is mounted and fixed on the pair of left and right support bases 26 with the vibration isolating member 100 interposed therebetween.

A fuel tank 102 and a hydraulic oil tank 103 are provided on the front side of the bottom wall 6 of the body frame 1. The fuel tank 102 is disposed immediately behind the partition plate 80, and by sliding the partition plate 80 upward from the frame body 9, the fuel tank 102 is slid forward on the bottom wall 6, so that the front end of the frame body 9 is It can be taken upward from the part.
A traveling hydraulic control device 105 is provided in front of the engine 101, and a triple gear pump 106 is provided in front of the traveling hydraulic control device 105. A work control valve (hydraulic control device) 107 is provided in the middle part in the front-rear direction of the right side wall 7.

  The traveling hydraulic control device 105 supplies and discharges the hydraulic oil in the hydraulic oil tank 103 to and from the pair of left and right traveling motors 74 by the power of the engine 101 to drive and control the pair of left and right traveling motors 74. The gear pump 106 supplies and discharges hydraulic oil in the hydraulic oil tank 103 to and from the boom cylinder 79 and bucket cylinder 98 via the work control valve 107 by inputting the power of the engine 101 via the traveling hydraulic control device 105. The work control valve 107 drives and controls the boom cylinder 79 and the bucket cylinder 98 to expand and contract the boom cylinder 79 and the bucket cylinder 98.

  According to the above embodiment, the body frame 1 includes the frame body 9 having the bottom wall 6, the pair of left and right side walls 7, and the front wall 8, and the pair of left and right support frame bodies 11. Since the body 11 is connected to the rear end portion of the frame main body 9 by welding, the entire body frame 1 can be integrally formed without using a fastening tool such as a bolt and a nut. Ensuring is advantageous. In addition, there are no concerns about loosening of fasteners such as bolts and nuts and damage to the mounting holes for inserting the bolts in the constituent parts of the body frame 1. Further, the number of bolts required for assembling the body frame 1 is not required, the number of assembly steps for the body frame 1 is reduced, and the entire body frame 1 can be easily manufactured.

  The mounting plate 16 is fixed to the upper end of the rear end of the side wall 7 by welding, and the front side lower ends of the inner side wall 12 and the outer side wall 13 of the pair of left and right support frames 11 are fixed to the upper surface side of the mounting plate 16 by welding. Therefore, the attachment plate 16 is interposed between the upper end of the rear end of the side wall 7 of the frame body 9 and the inner side wall 12 and the outer side wall 13 of the support frame 11, thereby The inner wall 12 and the outer wall 13 of the support frame 11 can be easily and reliably welded, and the inner wall 12 and the outer wall 13 of the support frame 11 are attached to the upper end of the rear end of the side wall 7 of the frame body 9. The frame main body 9 and the support frame body 11 can be easily integrated. Further, since the mounting plate 16 is arranged at the upper end of the rear end portion of the side wall 7 so as to cross the T shape or the L shape, the mounting plate 16 can be easily and reliably welded to the upper end of the rear end portion of the side wall 7. The mounting plate 16 can be firmly fixed to the side wall 7, and the inner wall 12 and the outer wall 13 of the support frame 11 can be easily and reliably welded to the mounting plate 16. The inner wall 12 and the outer wall 13 can be firmly fixed to the mounting plate 16.

Moreover, since the track frames 73 of the pair of left and right traveling devices 3 are configured separately from the body frame 1 and are respectively attached to the pair of left and right side walls 7 of the frame body 9 by fasteners 87 such as bolts. By making the underframe separate from the frame 1, masking is not required in the case of two-color painting, and cost can be reduced by easy handling. That is, it is conceivable that the track frame 73 of the pair of left and right traveling devices is connected to the fuselage frame 1 by welding so that the fuselage frame 1 and the track frame 73 are integrally formed. In order to make 1 and the undercarriage different colors, it is necessary to paint the airframe frame 1 and the track frame 73 in two colors. At this time, masking is required, and the number of masking steps is required. When the machine body frame 1 and the track frame 73 are integrally formed, the track frame 73 has a considerable weight even if it is a single product. Therefore, the weight of the entire frame including the vehicle body frame 1 and the track frame 73 is increased, and handling is performed as a single product. However, in the case of the present invention, it is difficult to carry in and out of the machine frame. Since the frame around the undercarriage can be separated, the man-hours for masking are not required for two-color painting, and handling in a single product becomes easy, and the body frame 1 and the track frame 73 are separated separately. It becomes possible to carry in and out of the equipment, and the manufacturing cost is lowered.

Further, a bent edge portion 8a projecting rearward is provided at the upper end of the front wall 8, and connecting pieces 8b are provided to project outwardly on the left and right sides of the bent edge portion 8a, respectively. Since the frame body 9 itself is welded to the front end of the bent edge portion 7a of the side wall 7, the frame body 9 itself can be made stronger.
Further, the horizontal connecting member 19 that connects the upper portions of the inner wall 12 of the pair of left and right support frame bodies 11 includes a front wall plate 20 and an upper wall plate 21 that protrudes rearward from the upper end of the front wall plate 20. Since the rear portion 21a of the upper wall plate 21 is inclined downward and downward, when the driver or the like seated on the driver seat 63 of the cabin 4 looks rearward, the upper wall plate 21 of the horizontal connecting member 19 is inclined rearward. It is possible to prevent as much as possible from obstructing the downward field of view, and it becomes possible to easily see the obliquely lower part of the rear, so that traveling or work by the truck loader can be performed more smoothly.

The frame body 9 is provided with a partition plate 80 that partitions the front side and the rear side of the body frame 1, and the bottom wall body 58 of the cabin 4 is moved to the partition plate 80 when the cabin 4 swings in the mounting state. The partition wall 80, the bottom wall body 58 of the cabin 4 and the back wall body 51 of the cabin 4 are contacted from above, and the back wall body 51 of the cabin 4 from the rear side of the body frame 1 on which the engine 101 is mounted. Since the front side and the front side of the body frame 1 are shielded, the partition plate 80, the bottom wall body 58 of the cabin 4, and the back wall body 51 of the cabin 4 constitute an engine on the rear side of the body frame 1. The hot air from the engine 101 does not reach the driver's legs or the like in the cabin 4 seated on the driver's seat 63 or the driver's legs protruding into the fuselage frame 1. Reliable from heat It can be protected in.

  Further, the front end portion and the rear end portion of the track frame 73 of the pair of left and right traveling devices 3 are fixed to the outside of the pair of left and right side walls 7 of the body frame 1 by fasteners such as bolts. Since the pair of left and right front reinforcing plates 75 and the pair of left and right rear reinforcing plates 76 are overlapped and fixed to the inner surface side of the side wall 7 by welding, corresponding to the fixing position of the track frame 73, the front reinforcing plate 75 and The fixed portion of the track frame 73 of the pair of left and right side walls 7 of the frame body 9 can be effectively reinforced by the rear reinforcing plate 76. In addition, the pair of left and right reinforcing plates 75 and 76 have upright walls 75 a and 76 a that overlap on the inner surface of the side wall 7, and lower walls 75 b and 76 b that overlap on the upper surface of the bottom wall 6 in an L shape. The front reinforcing plate 75 and the rear reinforcing plate 76 are more rigid on their own, and the body frame 1 can be firmly reinforced from the side wall 7 to the bottom wall 6 by the front reinforcing plate 75 and the rear reinforcing plate 76. it can.

Further, since the lower walls 75b of the pair of left and right front reinforcing plates 75 are separated from each other in the left and right directions, even if dust or hydraulic oil falls on the bottom wall 6 of the frame body 9, the bottom wall 6 is supported by the lower wall 75b. Thus, there is no step that blocks the discharge of dust and hydraulic oil at the center in the width direction, and the dust and hydraulic oil on the bottom wall 6 can be easily discharged.
In the above embodiment, the base side of the boom 77 is supported on the rear upper part of the body frame 1 via the first lift link 81 on the rear side and the second lift link 82 on the front side so as to be swingable up and down. Instead of this, the base portion side of the boom 77 may be directly swingably supported at the rear portion of the body frame 1 without the first lift link 81 and the second lift link 82 being interposed.

  Further, in the above-described embodiment, the track frames 73 of the pair of left and right traveling devices 3 are configured separately from the body frame 1 and are respectively attached to the pair of left and right side walls 7 of the frame body 9 by fasteners 87 such as bolts. However, instead of this, the track frame 73 of the pair of left and right traveling devices 3 is welded to the pair of left and right side walls 7 of the frame body 9 so that the track frame 73 is integrated with the body frame 1. May be.

It is a side view of the truck loader in the state where the boom which shows one embodiment of the present invention was raised. It is a side view of the track loader in the state where the boom is lowered. It is side surface sectional drawing of the track loader. It is front sectional drawing of the track loader. It is a top view of the track loader. It is a perspective view of the machine frame.

DESCRIPTION OF SYMBOLS 1 Airframe frame 2 Loader work apparatus 3 Traveling apparatus 4 Cabin 6 Bottom wall 7 Side wall 8 Front wall 9 Frame main body 11 Support frame body 12 Inner side wall 13 Outer side wall 14 Connection wall 16 Mounting plate 17 Fender 19 Horizontal connection member 21 Upper wall board 21a Rear part 27 Connecting reinforcing plate 28 Lower connecting plate 43 Side wall body 51 Back wall body 63 Driving seat 73 Truck frame 75 Front reinforcing plate 75a Standing wall 75b Lower wall 76 Rear reinforcing plate 76a Standing wall 76b Lower wall 77 Boom 79 Boom cylinder 80 Partition plate 83 Step 87 Fastener 101 Engine

Claims (4)

The cabin (4) is mounted on the body frame (1) supported by the left and right traveling device (3), and the boom (77) is provided on both the left and right sides of the body frame (1) and the cabin (4). The base side of each of the left and right booms (77) passes through the first lift link (81) on the rear side and the second lift link (82) on the front side so that the front end side of the left and right is raised and lowered on the front side of the body frame (1). A boom cylinder (79) is provided at the rear part of the body frame (1) so as to be swingable up and down, and moves the boom (77) up and down between the base side of the boom (77) and the rear part of the body frame (1). And
The body frame (1) includes a frame body (9) having left and right side walls (7) and a pair of left and right support frames (11) connected to the rear end side of the frame body (9). The frame (11) has an inner wall (12) and an outer wall (13), and a front lower portion is fixed to the upper part of the rear end of the left and right side walls (7) of the body frame (1) (16 is secured to the upper surface side of)
The lower base of the first lift link (81) is pivotally supported by the support frame (11) via the first link support shaft (85), and the lower base of the second lift link (82) is the support frame ( 11) is pivotally supported via a second link support shaft (86) on a stay member (34) fixed to the upper front end portion of the upper frame 11), and the upper edge of the front portion of the outer wall (13) of the support frame (11) is A track loader arranged below the two-link support shaft (86) . The upper portions of the inner side walls (12) of the left and right support frames (11) are connected to each other by a lateral connection member (19), and the second link support shaft (86) is located in front of the lateral connection member (19) and the cabin ( The track loader according to claim 1, wherein the track loader is supported by the inner wall (12) and the stay member (34) in the vicinity of the back wall (51) of 4) . The upper end of the rear end of each of the left and right side walls (7) is inclined so as to gradually move downward as it goes rearward, and is fixed so that the mounting plate (16) intersects the T-shape or L-shape, The outer part of the mounting plate (16) protrudes outward from the upper end of the side wall (7),
Each of the left and right side walls (7) is provided with a bent edge (7a) protruding outward in the left-right direction at the upper end on the front side from the rear end, and the rear end of the bent edge (7a) is attached to the mounting plate ( A fender (17) that is fixed to the front end of 16) and covers the upper side and the rear side of the traveling device (3) with the bent edge (7a) of the side wall (7) and the outer side of the mounting plate (16). Configured,
The frame body (9) has a front wall (8) at the front end of the left and right side walls (7), and a bent edge (8a) protruding rearward is provided at the upper end of the front wall (8). Connecting pieces (8b) are provided on the left and right sides of the part (8a) so as to protrude rearward, and each connecting piece (8b) is fixed to the front end of the bent edge (7a) of the side wall (7). The truck loader according to claim 1 or 2 . The base side of a pair of left and right booms (77) whose tip side moves up and down on the front side of the body frame (1) is supported on the rear part of the body frame (1) supported by the left and right traveling device (3) so as to be swingable up and down. In a truck loader provided with a boom cylinder (79) for moving the boom (77) up and down between the base side of the boom (77) and the rear part of the fuselage frame (1),
The body frame (1) includes a frame body (9) having left and right side walls (7) and a pair of left and right support frames (11) connected to the rear end side of the frame body (9). The base of the boom (77) is swingably supported by the frame (11), and the lower base end of the boom cylinder (79) is connected to the frame (11).
Each of the left and right support frames (11) is fixed to the upper surface side of the mounting plate (16) whose front lower portion is fixed to the upper rear end portion of the left and right side walls (7) of the body frame (1) .
On the body frame (1), the engine (101) is mounted on the rear side, the cabin (4) is mounted on the front side, and the bottom side of the cabin (4) is mounted on the body frame (1). And the bottom side of the cabin (4) is supported in a swingable manner so as to be separated from the airframe frame (1) upward,
The cabin (4) is connected between a pair of left and right side wall bodies (43), a back wall body (51) that closes the back side of the cabin (4), and a lower end portion of the left and right side wall bodies (43) and a driver seat (63 ) Provided with a bottom wall body (58),
A partition plate (80) for partitioning the front side and the rear side of the body frame (1) in the frame body (9) and contacting the bottom wall body (58) of the mounted cabin (4) from above. Provided,
The partition plate (80), the bottom wall body (58) of the cabin (4), and the back wall body (51) of the cabin (4), from the rear side of the body frame (1) on which the engine (101) is mounted, front and features and to belt rack loader that is configured to shield the front side of the body frame (1) of Sekabetai (51) of the cabin (4).

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