JP4540562B2 - Swivel work vehicle - Google Patents

Swivel work vehicle Download PDF

Info

Publication number
JP4540562B2
JP4540562B2 JP2005196831A JP2005196831A JP4540562B2 JP 4540562 B2 JP4540562 B2 JP 4540562B2 JP 2005196831 A JP2005196831 A JP 2005196831A JP 2005196831 A JP2005196831 A JP 2005196831A JP 4540562 B2 JP4540562 B2 JP 4540562B2
Authority
JP
Japan
Prior art keywords
boom
frame
pedal
swivel
turning
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.)
Expired - Fee Related
Application number
JP2005196831A
Other languages
Japanese (ja)
Other versions
JP2007015464A (en
Inventor
剛 田中
Original Assignee
ヤンマー株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ヤンマー株式会社 filed Critical ヤンマー株式会社
Priority to JP2005196831A priority Critical patent/JP4540562B2/en
Publication of JP2007015464A publication Critical patent/JP2007015464A/en
Application granted granted Critical
Publication of JP4540562B2 publication Critical patent/JP4540562B2/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Description

  The present invention relates to a turning work vehicle having a step on a front part of a turntable frame and a front cover that covers a front upper part of the step.

Conventionally, in a swivel working vehicle such as a backhoe, a swivel frame is generally disposed on a traveling device, and a work machine having an attachment such as a boom, an arm, and a bucket is attached to the front of the swivel frame, An engine, counterweight, etc. are arranged on the rear part of the base frame. In addition, a step including a boom swing operation pedal, a PTO operation pedal, and the like is provided at the front of the driving operation unit on the swivel base frame, and a front cover is provided to cover the operation pedal at the front end of the step. It is arranged. And the front cover was provided with the headlamp, and it was comprised so that a driver | operator's front could be illuminated with this headlamp (for example, refer patent document 1).
JP 2003-336290 A

  In conventional turning work vehicles, the headlamps are arranged in the vicinity of the turntable frame, so that the height position is lowered, the irradiation range is narrowed, and sufficient visibility cannot be obtained. It was. In addition, a headlamp may be provided on the canopy that covers the driving operation unit. However, when the canopy is removed and the work is performed, there is a problem that the front of the driver cannot be illuminated.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

In a turning work vehicle having a step (12) on the front portion of the turntable frame (5) and arranging a front cover (81) covering the upper front of the step (12), the front cover (81) is viewed from the front. A front lamp (83) is provided at the center upper portion of the front cover (81) that is convex and is convex in front view , and both side portions of the front cover (81) are arranged on the left and right sides of the step (12). It is arranged in front of the arranged PTO operation pedal (67) and swing pedal (68) .

  As effects of the present invention, the following effects can be obtained.

  According to the first aspect of the present invention, it is possible to reliably illuminate the front of the operator by arranging the headlamp as high as possible, thereby improving the visibility of the surroundings.

In addition , when the legs are extended forward of the pedal, it is possible to move forward from both sides of the front cover, and an easy posture can be taken. Thereby, a living space can be expanded.

  Next, embodiments of the invention will be described.

  1 is a left side view of a rear ultra-small turning type turning work vehicle according to an embodiment of the present invention, FIG. 2 is a perspective view of the machine in the turning work vehicle, and FIG. 3 shows an arrangement configuration on a turntable frame. 4 is a rear view showing an arrangement configuration on the swivel base frame, FIG. 5 is a plan view of the swivel base frame, FIG. 6 is a front perspective view of the engine support part, and FIG. 7 is a rear perspective view of the engine support part. 8 is a left side view of the engine support portion, FIG. 9 is a perspective view of the engine support member, FIG. 10 is a right side view showing an arrangement configuration on the swivel base frame, FIG. 11 is a side view of the louver, and FIG. FIG. 13 is a perspective view, and FIG. 13 is a front view showing the arrangement configuration of the front right side on the swivel frame.

  14 is a left side view showing the arrangement configuration on the swivel frame, FIG. 15 is a perspective view showing the arrangement configuration of the front left side on the swivel frame, FIG. 16 is a perspective view of the step portion in the pedal operation state, and FIG. Is a perspective view of the step portion in the pedal storage state, FIG. 18 is a side view of the pedal support portion, FIG. 19 is a perspective view of the front cover, FIG. 20 is a rear view of the front cover, and FIG. FIG. 22 is a left side view of an ultra-small turning type turning work vehicle according to an embodiment of the present invention, FIG. 23 is a right side view of the upper part of the ultra-small turning type turning work vehicle, and FIG. 24 is a turntable frame. FIG. 25 is a rear view of the offset working machine, and FIG. 26 is a rear view of the second boom.

  As shown in FIGS. 1, 2, and 3, in the rear ultra-small turning type backhoe in which the work machine 1 is mounted at the front left and right center of the machine 2, a swivel bearing is provided at the upper center of the crawler type traveling device 3. The turntable frame 5 is supported so as to be able to turn left and right, and a turn motor 6 is arranged on the turntable frame 5. A blade 7 is disposed on the front and rear sides of the crawler type traveling device 3 so as to be rotatable up and down. A bonnet 10 that covers the engine 8 and the like is disposed on the upper part of the swivel base frame 5, and a driver's seat 11 is disposed on the bonnet 10 or on the front side of the bonnet 10. An operation lever, a lock lever, and the like are disposed in the vicinity of the driver's seat 11, and a driving lever, a pedal, and the like are disposed on the step 12 in front of the driver's seat 11 to configure the driving operation unit 13. A canopy 14 or a cabin is disposed above the operation unit 13.

  A boom bracket 15 is attached to the left and right central portion of the front end of the swivel base frame 5 so as to be turnable in the left-right direction. Yes. The boom 16 is bent forward in the middle and is formed in a generally “<” shape in side view. A rear end portion of the arm 17 is supported by the upper end portion of the boom 16 so as to be able to rotate back and forth, and a bucket 18 as a work attachment is supported at the front end portion of the arm 17 so as to be able to rotate back and forth. A boom cylinder 20 for turning the boom is interposed between the front part of the boom bracket 15 and the front part of the middle part of the boom 16, and an arm cylinder 21 for turning the arm is provided at the rear part of the middle part of the boom 16 and the rear end of the arm 17. A bucket cylinder 22 for rotating the bucket is interposed between the stay at the rear portion of the arm 17 and the bucket 18. The work machine 1 is composed of the boom 16, the arm 17, the bucket 18, the cylinders 21, 22, and 23.

  In the working machine 1, the boom 16 can be rotated by the telescopic drive of the boom cylinder 20, the arm 17 can be rotated by the telescopic drive of the arm cylinder 21, and the bucket 18 can be rotated by the telescopic drive of the bucket cylinder 22. It is possible. Further, in this machine 2, the swivel frame 5 on the crawler type traveling device 3 can be turned by the rotation drive of the turning motor 6. The cylinders 21, 22, and 23 and the swing motor 6, which are hydraulic actuators, switch the control valve 25 by a rotation operation of an operation lever or a pedal disposed in the operation operation unit 13, thereby It is configured to be driven by pressure oil supplied from a hydraulic pump 26 disposed in a through a hydraulic hose.

  As shown in FIGS. 2 to 5, an opening 5 a for disposing a swivel bearing is provided at the front, rear, left, and right center of the swivel frame 5, and the center is the swivel center of the machine 2. . The rear part of the swivel frame 5 is formed to have a semicircular shape (approximately 3/5 circle) centered on the swivel center in plan view, and the radius of the semicircular portion is the rear end of the swivel frame 5 Is substantially the same as the radius of the turning trajectory. In other words, the distance from the turning center to the arc portion is the radius of the substantially circular turning locus drawn by the rear part of the turntable frame. The swivel base frame 5 has a left-right width that substantially coincides with the left-right width of the crawler type traveling device 3 and is turned by driving a turning motor 6 provided in the vicinity of the opening 5a on the crawler type traveling device 3. It is configured to be able to.

  Further, the front part of the swivel base frame 5 is cut out in a straight line on the left and right, and the outer periphery of the front part is formed in a straight line. A boom bracket mounting portion 5b for mounting a boom bracket 15 configured in a substantially triangular shape in plan view is provided at the center of the left and right sides of the straight portion so as to protrude forward, and a work is provided at the front of the boom bracket mounting portion 5b. A boom bracket 15 to which the machine 1 is attached is disposed so as to be located within the turning radius. A driving operation unit 13 is disposed on the left side of the swivel frame 5, and a bonnet 10 is disposed along the outer peripheral shape of the swivel frame 5 on the right and rear sides, and the engine 8 is disposed in the bonnet. A hydraulic pump 26, a fuel tank, a hydraulic oil tank, a radiator and the like are accommodated.

  Further, a step portion 5c recessed backward is provided on the left and right sides of the front portion of the swivel frame 5 and on the right side which is the opposite side to the driving operation portion 13 in this embodiment. The front surface of the step portion 5c extends in the left-right direction. An opening 10a is provided above the front surface of the stepped portion 5c, and a swing cylinder 28 is provided so as to protrude toward the boom bracket 15 from the opening 10a. The swing cylinder 28 is pivotally supported at a pivot end 5d provided on the swivel frame 5 at the rear end, and is connected to the boom bracket 15 at the front end. It is configured to be able to turn left and right with respect to the frame 5.

  Further, above the stepped portion 5c of the swivel base frame 5, the stepped portion 5c and the opening 10a are concealed so as to cover the front portion of the cylinder tube of the swing cylinder 28 and to be positioned within the turning radius. Two steps 29 are provided. The second step 29 has a substantially triangular shape in plan view and is detachably fixed to the front portion of the bonnet 10, and the height of the upper surface continuously coincides with the step 12 provided in the front portion of the driving operation portion 13 in the left-right direction. Are arranged as follows. In this way, a walk-through space extending in the left-right direction is formed above the step 12 and the second step 29, and the workable range on the machine 2 is expanded by the walk-through space, thereby improving workability. . In addition, the hydraulic hose is collectively extended from the opening 10 a below the second step 29 toward the cylinders 20, 21, 22 included in the work machine 1, and the second step 29 can be easily removed by removing the second step 29. Maintenance can be performed.

  Further, on the swivel base frame 5 covered with the bonnet 10, as shown in FIGS. 6 to 9, an engine support member 31 that supports the engine 8 arranged in the left-right direction on the swivel base frame 5, and a canopy A support body integrally configured with a canopy mounting member 32 for mounting the head is fixedly disposed on the swivel frame 5. This support body is comprised by the side view substantially L-shape.

  As shown in FIG. 9, the engine support member 31 includes a rear frame 31a and a front frame 31b arranged in parallel in the front-rear direction, and frames 31c and 31d arranged in parallel in the front-rear direction. The frames 31a, 31b, 31c, and 31d are arranged in a horizontal direction and configured in a frame shape. The rear frame 31a is fixed directly on the swivel base frame 5, and the front frame 31b is fixed on the swivel base frame 5 via a bracket 33 bent in an inverted U shape when viewed from the side. Between the rear frame 31a and the front frame 31b, left and right frames 31c and 31d configured in the shape of a ship in a side view are horizontally provided with an appropriate interval. The engine 8 is supported on the rear frame 31a and the front frame 31b of the engine support member 31 via a vibration isolating member 34, and a canopy mounting member 32 is erected on the rear frame 31a.

  The canopy mounting member 32 includes columnar left and right frames 32a and 32b and plate-shaped canopy mounting plates 32c. The left and right frames 32a and 32b protrude upward from the left and right sides of the rear frame 31a of the engine support member 31, respectively. The canopy mounting plate 32c is horizontally provided between the upper ends of the left and right frames 32a and 32b. Thus, the canopy mounting member 32 is formed integrally with the engine support member 31 and is fixed on the swivel frame 5 with bolts or the like, so that the canopy mounting member 32 falls in the front-rear direction rather than being fixed on the swivel frame 5 alone. And vibration can be reduced. That is, since a heavy engine is placed on the engine support member 31, the canopy mounting member 32 is not easily tilted backward, and the forward tilt is stretched by the engine support member 31, and is stable on the swivel frame 5. Can be supported. The canopy mounting plate 32c is disposed behind the driver seat 11 of the driving operation unit 13, and the canopy 14 is mounted and fixed on the canopy mounting plate 32c.

  Further, a reinforcing member 35 is connected between the upper portion of the canopy mounting member 32 and the front portion of the engine support member 31 to reinforce the support body. That is, the reinforcing member 35 is formed so that the plate has a substantially inverted L shape when viewed from the side, and is disposed so as to surround the front upper side of the engine 8, and is connected to the front frame 31b of the engine support member 31 at the lower portion of the vertical portion 35a. The canopy mounting member 32 is connected to the canopy mounting plate 32c at the rear portion of the horizontal portion 35b. Thus, the canopy mounting member 32 and the engine support member 31 are firmly fixed in a frame shape in a side view by the reinforcing member 35.

  As a result, the canopy mounting member 32 and the engine support member 31 are integrally fixed to the swivel base frame 5. Compared to the case where the canopy mounting member 32 is fixed to the swivel base frame 5, the canopy is fixed. The attachment member 32 can be firmly fixed and stabilized. Further, the canopy mounting member 32 and the engine support member 31 can be assembled to the swivel frame 5 in a state where various devices are mounted on the canopy mounting member 32 and the engine support member 31, thereby improving the assembly property as a module. You can plan.

  Examples of equipment that can be attached to a support that integrally includes the canopy attachment member 32 and the engine support member 31 include a battery 36, an air cleaner 37, and a radiator 40. The battery 36 is supported and fixed on a battery mounting base 38 attached to the left frame 32 a of the canopy attachment member 32, and is disposed at the upper left rear of the engine 8. The air cleaner 37 is attached to the bottom surface of the canopy attachment plate 32c via a stay 39 or the like, and is disposed on the rear upper side of the left and right center portion of the engine 8. The radiator 40 is supported on a radiator support base 41 attached to the right ends of the rear frame 31 a and the front frame 31 b of the engine support member 31, and is disposed on the right side of the engine 8. In addition, a hydraulic hose and a harness are also attached to the canopy attachment member 32 to prevent vibration and entanglement.

  Furthermore, a muffler 42 is attached to the reinforcing member 35. The muffler 42 is attached via a stay 43 attached to the horizontal portion 35 b of the reinforcing member 35, and is arranged in the front-rear direction above the engine 8. In this way, by arranging various devices to be attached to the support body, before attaching to the swivel frame 5, the engine 8 is attached to the support body, and then the canopy attachment member 32 and the reinforcement from the front, rear, left and right surroundings of the engine. Various components such as the battery 36, air cleaner 37, radiator 40, and muffler 42 are attached to the member 35, so that the assembly work can be performed by easily bringing tools and hands close to each component. You can work.

  As shown in FIG. 3, the engine 8 supported on the engine support member 31 is disposed such that the crankshaft is in the left-right direction of the machine body. A cooling fan 45 is provided on the right side of the engine 8 and can be driven by the engine 8 via a belt or a pulley. Then, as shown in FIG. 7, a radiator 40 and an oil cooler 46 are connected to the right side of the cooling fan 45 in the front-rear direction, and are arranged so that they do not overlap in a side view and the front end faces outward. ing. A shroud 47 is provided between the radiator 40 and the oil cooler 46 and the cooling fan 45, and a substantially triangular space is formed in the shroud 47 in plan view. Thus, the cooling air generated by the rotation of the cooling fan 45 passes through the space in the shroud 47 and simultaneously strikes the radiator 40 and the oil cooler 46 to cool them.

  2 and 10, the radiator 40 and the oil cooler 46 are disposed at a predetermined distance from the side wall of the bonnet 10 formed in an arc shape, and the radiator 40, the oil cooler 46, and the bonnet 10 are arranged. A duct 48 is provided between the side walls. An opening 10b is provided in a portion of the side surface of the bonnet 10 facing the radiator 40 and the oil cooler 46, and the duct 48 is communicated with the outside through the opening 10b. The portion 10b can be discharged to the outside. In addition, a horizontal beam 10c is installed horizontally in the opening 10b, and a mesh member is provided, and the radiator 40 and the oil cooler 46 are protected by the horizontal beam 10c and the mesh member.

  A movable louver 50 is provided in the duct 48 between the radiator 40 and the oil cooler 46 and the opening 10 b provided on the side surface of the bonnet 10, and the louver 50 provides cooling air from the cooling fan 45. When the air is discharged from the opening 10b to the outside, the direction of the cooling air can be changed.

  As shown in FIGS. 11 and 12, the louver 50 includes a pair of front and rear side frames 51, 51 fixed to the side wall of the duct 48, and a plurality of wings arranged vertically between the side frames 51, 51. Are composed of plates 52, 52..., Means for changing the angle of the blades 52, 52. The slats 52, 52... Are laid horizontally in parallel, and are formed by projecting shafts 52a, 52a from one end in the short direction at both longitudinal ends of each slat 52 toward the side frames 51, 51. Has been. The shaft portions 52a and 52a are pivotally supported by bearing portions 51a and 51a provided at predetermined intervals in the vertical direction of the left and right side frames 51 and 51, respectively. In this way, the both sides of each slat 52 are rotatably supported by the left and right side frames 51 and 51 so as to be movable. The outer side of the slat 52 is bent slightly obliquely upward, and the portion facing the oil cooler 46 is made narrower and is shaped along the side wall of the bonnet 10.

  Further, a pivot portion 52b is provided to protrude from the other end in the short direction at one longitudinal end of each wing plate 52 in parallel with the shaft portion 52a, and the pivot portion 52b is disposed in the vertical direction in parallel with the side frame 51. The lever 53 is pivotally supported. Thus, the lever 53 is linked to the slats 52, 52... And the slats 52, 52... Can be rotated in the same direction by moving the lever 53 in the vertical direction. Yes. Further, the upper portion of the lever 53 extends upward in the duct 48 and is bent so that the upper end portion 53 a is in contact with the side wall of the duct 48. A position fixing member is disposed between the upper portion of the lever 53 and the duct 48. That is, the bolt protrudes laterally from the upper end portion 53 a of the lever 53.

  An arc-shaped elongated hole 48a is provided in the side wall of the duct 48 on the side of the upper end portion 53a of the lever 53, the bolt protrudes outward from the elongated hole 48a, and a wing nut 55 is screwed. By tightening the wing nut 55, the lever 53 can be fixed at an arbitrary position. In this way, the louvers 52, 52... Of the louver 50 can be changed to an arbitrary angle and held. However, the fixing means of the lever 53 is not limited to bolts and nuts, but may be pins or the like, and a motor is connected to any one of the shaft portions 52a, and the blades 52, 52, The angle of the blades 52, 52,... Can be changed by changing the angle of... Or by connecting the lever 53 to the cylinder and expanding and contracting the cylinder. The actuator such as a motor or a cylinder may be configured to be remotely operated by an operation means provided in the operation unit.

  As described above, the louver 50 is configured to operate the lever 53 from above the duct 48 to hold the blades 52, 52... At an arbitrary angle. Thus, for example, when the nut 55 is positioned and tightened at the upper end of the long hole 48a provided in the side wall of the duct 48 and the lever 53 is at the uppermost position, the outside of the slat 52 is held obliquely upward. can do. Conversely, when the nut 55 is positioned and tightened at the lower end of the long hole 48a and the lever is fixed at the lowest position, the blade 52 is set so as to be held in a substantially horizontal state. Further, the nut 55 can be positioned and fixed at an arbitrary position above and below the long hole 48a.

  Therefore, after cooling the radiator 40 and the oil cooler 46 with the cooling air generated by the rotation of the cooling fan 45, the cooling air is discharged from the opening 10b provided in the bonnet 10. The discharge direction of the cooling air depends on the situation. The angle can be changed sideways or diagonally upward. Therefore, it is possible to prevent the heated cooling air from blowing onto standing trees, pedestrians, and the like. For example, when there is a standing tree on the side of the machine, the cooling air can be discharged so as not to blow on the standing tree by changing the discharge direction of the cooling air obliquely upward of the machine. Further, when the warmed cooling air is discharged upward, depending on the wind direction, the driver on the driving operation unit 13 may be blown. In such a case, by changing to a substantially horizontal direction, the cooling air can be discharged to the side, and it is possible to prevent the warm cooling air from blowing to the operator.

  Further, as shown in FIG. 10, the nut 55 for adjusting the louver 50 is disposed below the cover 58 that covers the maintenance space 10 d provided in the right front portion of the bonnet 10. The cover 58 is configured such that a rear end thereof is pivotally supported by the airframe, and is rotated up and down around the rear end to open and close. Thus, when the cover 58 is rotated upward and opened, the nut 55 is exposed and the nut 55 can be operated, and the angle adjustment of the louvers 52, 52. Can be done easily and quickly.

  A fuel tank 59 is provided in front of the radiator 40 and the louver 50. As shown in FIGS. 10 and 13, the fuel tank 59 is placed and fixed on the swivel frame 5, and the upper part is covered with the cover 58. A fuel supply port 59a is provided on the upper surface of the fuel tank 59. By opening the cover 58 by turning it upward, fuel can be supplied into the fuel tank 59 from the fuel supply port 59a. On the other hand, the inner side in the left-right direction of the fuselage at the lower part of the fuel tank 59 has a cutout shape, and the swing cylinder 28 is disposed in the cutout portion 59b. Thus, the fuel tank 59 can be disposed on the left and right sides of the swing cylinder 28 and the swivel frame 5 while expanding the lower portion of the fuel tank 59 to the side of the swing cylinder 28 to increase the capacity. However, it is also possible to arrange the reservoir tank with the same configuration instead of the fuel tank 59.

  The second step 29 is disposed in front of the fuel tank 59, and an operator rotates the cover 58 on the second step 29 to adjust the angle of the louver 52 of the louver 50, or to adjust the fuel. The tank 59 can be refueled from a refueling port 59a.

  Further, the hydraulic pump 26 is provided on the opposite side to the radiator 40 of the engine 8 and can be driven by the engine 8. As shown in FIG. 3, a reservoir tank 61 is provided on the left side of the hydraulic pump 26, and the control valve 25 is provided in front of the reservoir tank 61. The control valve 25 and the hydraulic pump 26, the reservoir tank 61, and the control valve 25 and the swing motor 6, the swing cylinder 28, the cylinders 20, 21, and 22 of the work machine 1 are connected by a hydraulic hose. The hydraulic oil is supplied from the reservoir tank 61.

  As shown in FIGS. 14 and 15, the control valve 25 is disposed in front of the reservoir tank 61 at the left front portion of the swivel base frame 5, and is held by the bracket 62 in a state where the control valve 25 stands up leaning forward and backward. It is fixed. By arranging the control valve 25 in an inclined manner in this way, it can be arranged as far as possible on the front side of the swivel base frame 5, and the rear end position of the control valve 25 can also be positioned forward. Therefore, the space behind the space can be made large. In this space, the front portion of the reservoir tank 61 can be bulged and the capacity of the reservoir tank 61 can be increased. Further, an external take-out part 63 for a breaker or the like as a retrofitting work machine can be arranged in a space formed in front of and below the control valve 25.

  A pedal base 65 is provided at the upper end of the bracket 62 to which the control valve 25 is attached, and the step 12 is disposed above the pedal base 65. Step 12 includes a front step 12A covering the pedal base 65 and a rear step 12B connected to the rear portion of the front step 12A. The step 12A includes a plurality of pedals and levers on the front step 12A or the rear step 12B. Configured. Here, a travel acceleration pedal 66, a PTO operation pedal 67, and a swing pedal 68 are arranged in order from the left in the vicinity of the front center of step 12, and a pair of left and right travels between the PTO operation pedal 67 and the swing pedal 68 are arranged. Operation levers 69 and 69 are provided so as to protrude upward. Further, operation pedals 70 and 70 are integrally provided below the left and right operation levers 69 and 69, and the operation levers 69 and 69 can be operated by the operation pedals 70 and 70. .

  As shown in FIGS. 16 to 18, the PTO operation pedal 67 and the swing pedal 68 are respectively supported by the pedal base 65 so as to be pivotable back and forth around the fulcrum shafts 71 and 72 on one side (front side). The control valve 25 is linked via a link mechanism 73 provided in 65. Similarly, the operation levers 69 and 69 are supported so as to be pivotable back and forth around the fulcrum shafts 74 and 74 and linked to the control valve 25 via a link mechanism 73 provided in the pedal base 65. Here, as described above, since the control valve 25 is arranged to be inclined obliquely from front to back and low, the upper end of the control valve 25 and the operation lever 69 and the operation pedal are arranged rather than laying down as in the prior art. It is possible to reduce the distance from the camera 70 and the like, and the link mechanism 73 that links the two can be configured simply to reduce the cost. In addition, the operation pedals 70 and 70 can be stably depressed.

  The PTO operation pedal 67 and the swing pedal 68 are formed in a substantially L shape when viewed from the side, and are provided with foot placement portions 67a and 68a on the upper and lower surfaces on one side, and pivot on the fulcrum shafts 71 and 72 on the other side. It is supported and can be switched between an operation state in which it can be stepped on by turning in the front-rear direction and a storage state (footless and state) in which it cannot be operated. As shown in FIG. 16, the pedals 67 and 68 are rotated rearward until they are positioned on the rear step 12 </ b> B, and can be operated by abutting against the operation members of the hydraulic actuator provided in the link mechanism 73. As shown in FIG. 17, it is rotated forward to the front step 12 </ b> A and is brought into an inoperable storage state by contacting the receiving members 75 and 76 exposed in the front step 12 </ b> A, thereby becoming footless. ing.

  The pedals 67 and 68 are formed so that the centers of the placing portions 67a and 68a are recessed downward in the operating state, and when the feet are placed on the placing portions 67a and 68a and a depression operation is performed, the fulcrum shaft 71 is formed. -It is configured to rotate up and down about 72, thereby operating the control valve 25 via the link mechanism 73. However, the swing pedal 68 is operated by swinging left and right. When the operation state is manually switched to the retracted state and rotated forward, the left and right side portions abut against the receiving members 75 and 76 and are held on the previous step 12A. Optional switches 77 and 78 are provided in the center of the receiving members 75 and 76. When the pedals 67 and 68 are stored, the mounting portions 67a and 68a project upward from the pedals 67 and 68. It is covered with and protected.

  In such a configuration, when the operation of the PTO operation pedal 67 and the swing pedal 68 is not necessary, the pedals 67 and 68 are rotated forward about the fulcrum shafts 71 and 72 to be moved to the receiving member 75 of the previous step 12A. By abutting, it is possible to disable the operation of depressing the pedals 67 and 68 and prevent an erroneous operation. At the same time, since the optional switches 77 and 78 can be covered with the placing portions 67a and 68a of the pedals 67 and 68, erroneous operation thereof can be prevented. Furthermore, the lower surfaces of the placing portions 67a and 68a of the pedals 67 and 68 can be used as footrests, and the space in the step portion of the operator in step 12 can be used efficiently.

  On the other hand, when the operation of the PTO operation pedal 67 or the swing pedal 68 becomes necessary, the pedals 67 and 68 are rotated rearward about the fulcrum shafts 71 and 72 and arranged on the rear step 12B. , Depressing operation becomes possible. Therefore, when the pedals 67 and 68 are unnecessary, the pedals 67 and 68 themselves can be rotated forward from the rear step 12B and easily stored on the front step 12A. The space of the part can be widened. In addition, since the pedals 67 and 68 can be held in an inoperable state simply by rotating forward, a pedal cover that makes the pedal inoperable as in the prior art becomes unnecessary, and the number of parts can be reduced. .

  As shown in FIG. 2, a front cover 81 is disposed at the front end of the step 12 so as to cover the front of the PTO operation pedal 67, the swing pedal 68, and the like. As shown in FIGS. 19 to 21, the front cover 81 is formed in a convex shape when viewed from the front, and is laid horizontally between handrails 82 that are substantially gate-shaped when viewed from the front and are erected in front of the step 12. . An opening 81 a is provided at the center upper portion of the front cover 81, and the headlamp 83 is disposed in the opening 81 a so as to be as high as possible in front of the driving operation unit 13. Therefore, the front of the driver can be illuminated by the headlight 83, and visibility around the driver can be improved.

Further, the front cover 81 has its left and right side portions are arranged to be positioned in front of the pedal 67, 68 provided on both left and right sides of the step 12. As a result, when the foot is extended forward of the pedal, the front cover 81 can be moved forward from both the left and right sides, and the space at the foot portion of the operator can be enlarged.

  Then, as described above, the swivel frame 5 including the engine 8, the hydraulic pump 26, the fuel tank, the hydraulic oil tank, the radiator, and the like is provided with an attachment portion at the center of the left and right straight portions of the front portion, and the work machine is attached. Thus, although the turning work vehicle is a rear ultra-small turning type, an attaching portion is provided on the step portion 5c provided on the right side of the front portion, and the work machine is attached, and the turning work vehicle is made ultra-small as shown in FIG. It is comprised so that it can be set as a turning type. That is, except for the front end of the swivel base frame 5, the rear ultra-small turning type and the ultra-small turning type turning work vehicle have a common shape and can be shared by both. Therefore, the molding die of the swivel frame 5 in the rear ultra-small turning type and the ultra-small turning type turning work vehicle can be made common, and the productivity can be improved and the cost can be reduced.

  When an ultra-small turning type turning work vehicle is configured using the turning table frame 5, as shown in FIGS. 23 and 24, the work machine 101 has a turning table so that its fulcrum 105a is located within the turning radius. The step 5c of the frame 5 is pivotally supported by the pivotal support 5e and is arranged on the right side with respect to the swivel frame 5. In this way, the space of the driving operation unit 13 arranged on the opposite side of the work machine is ensured as wide as possible, and the comfort of the driving operation unit 13 is enhanced.

  As shown in FIGS. 23 and 25, the working machine 101 includes a bucket 102, an arm 103, a boom 104, a hydraulic cylinder for operating these, and the like. It is configured as an offset working machine that can be moved to The boom 104 is formed by connecting a first boom 105, a second boom 106, and a third boom 107 in order from the base side toward the front end side from the main unit side. The second boom 106 is pivotally supported at the tip of the first boom 105 so as to be pivotable up and down (back and forth) on the stepped portion 5c. A base portion of the third boom 107 is pivotally supported at the tip end portion of the 106 so as to be turnable in the left-right direction. The base of the arm 103 is pivotally supported at the tip of the boom 104, that is, the tip of the third boom 107, and the bucket 102 is pivotally supported at the tip of the arm 103 so as to be pivotable back and forth. ing.

  Further, the boom cylinder 111 for turning the boom is interposed between a bracket 112 projecting downward from the fulcrum 105a from the base portion of the first boom 105 and a pivot portion 5f provided at the rear portion of the swivel base frame 5. The arm cylinder 113 for turning the arm is interposed between the arm bracket 114 projecting upward from the base of the arm 103 and the base of the third boom 107, and the bucket cylinder 115 for turning the bucket is attached to the bucket 102. It is interposed between the link mechanism 116 and the arm bracket 114. Thus, the boom 104 can be rotated by the expansion / contraction drive of the boom cylinder 111, the arm 103 can be rotated by the expansion / contraction drive of the arm cylinder 113, and the bucket 102 can be rotated by the expansion / contraction drive of the bucket cylinder 115. Yes.

  An offset rod 119 is interposed between a bracket 117 projecting on the right side surface on the distal end side of the first boom 105 and a bracket 118 projecting on the right side surface on the base side of the third boom 107. An offset cylinder 123 is interposed between a bracket 121 projecting on the right side surface of the central portion of the first boom 105 and a bracket 122 projecting on the right side surface of the second boom 106. Thus, when the offset cylinder 123 is extended and contracted, the second boom 106 is rotated to the left and right, and the offset rod 109 is also rotated to the left and right in conjunction with the rotation of the second boom 106. The third boom 107, the arm 103, and the bucket 102 disposed on the distal end side are configured to be substantially parallel (offset) to the left and right without tilting to the left and right in the rear view.

  Here, as shown in FIG. 26, the second boom 106 is formed in a substantially parallelogram shape when viewed from the back, with the boom 104 pivoted in the rearmost direction, and one diagonal line A thereof is arranged in the vertical direction. The other diagonal line B is inclined to the left and right center of the body, and is pivotally supported by the first boom 105 and the third boom 107 respectively by pivot shafts 125 and 126 provided at both ends of the former diagonal line A. It is configured. In other words, the second boom 106 is a substantially parallelogram, and the angle α between the diagonal line A in the front-rear direction (vertical direction) and the base side 106b on the inner side of the aircraft is the side on the front side of the diagonal A and the inner side of the aircraft. It is configured to be smaller than the angle β with respect to 106c. As a result, the protrusion on the inner side of the base portion is reduced without lowering the rigidity of the second boom 106, making it difficult to come into contact with the inner side of the distal end portion of the first boom 105, and the second boom 106 is increased to the inside of the main body. It can be rotated. Since the offset amount of the second boom 106 can be increased in this way, the first boom 105 can be disposed as much as possible outside the machine body, and the space of the operation unit 13 can be increased. At this time, the portion 106a that bulges outward on the base side of the second boom 106 is larger than the bulge inward at the same upper and lower positions, so that the piston rod of the offset cylinder 123 that rotates the second boom 106 rotates. The bracket 122, which is a pivotal support portion, is provided to protrude further outward in a portion 106a that bulges outward on the base side of the second boom 106. A large rotation is possible.

  Further, the first boom 105 is formed in a substantially S shape in a side view. The first boom 105 has a bucket in a front space formed on the tip side when the work machine 101 is in the rearmost position and the bucket 102 is rotated so as to approach the boom 104 via the arm 103. 102 is configured to enter, and at the same time, the front portion of the bonnet 10 is configured to enter the rear space formed on the base side. As a result, the bucket 102 can be positioned as far back as possible without increasing the first boom 105, that is, the rotation angle of the work machine 101 to the rear, and the turning radius can be reduced.

  Further, as shown in FIG. 23, the boom cylinder 111 that rotates the boom 104 is housed in the bonnet 10 behind the stepped portion 5 c of the swivel base frame 5, and more than step 12 provided in the driving operation unit 13. It arrange | positions so that it may be located below. In this way, a large space in the bonnet 10 is secured, and it is possible to increase the capacity of the fuel tank 59, the reservoir tank 61 and the like housed in the space, and to ensure a space where the cooling air flows. Yes. Further, by arranging the boom cylinder 111 not on the work machine 101 side but on the main machine side, the work machine 101 can be made compact and lightweight.

  In the ultra-small turning work vehicle including the offset working machine 101 as described above, the boom cylinder 111 is placed on the turntable frame 5 with the swing cylinder 28 of the rear ultra-small turning work vehicle. The fuel tank 59 and the radiator 40 are arranged side by side on the swivel frame 5 and above the boom cylinder 111 in the same manner as described above, and the engine 8 and the reservoir tank 61 are disposed on the side of the radiator 40. It is installed side by side. In this way, various devices are efficiently arranged on the swivel base frame 5, and the layout is configured to be shared by the rear ultra-small turning type and the ultra-small turning type turning work vehicle.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a left side view of a rear ultra-small turning type turning work vehicle according to an embodiment of the present invention. The perspective view of this machine in a turning work vehicle. The top view which shows the arrangement configuration on a turntable frame. The rear view which shows the arrangement configuration on a turntable frame. The top view of a turntable frame. The front perspective view of an engine support part. The rear perspective view of an engine support part. The left view of an engine support part. The perspective view of an engine support member. The right view which shows the arrangement structure on a turntable frame. A side view of a louver. The perspective view of a louver. The front view which shows the arrangement configuration of the front right side on a turntable frame. The left view which shows the arrangement structure on a turntable frame. The perspective view which shows the arrangement configuration of the front left side on a turntable frame. The perspective view of the step part in a pedal operation state. The perspective view of the step part in a pedal accommodation state. The side view of a pedal support part. The perspective view of a front cover. The rear view of a front cover. The side view which shows the support structure of a headlamp. 1 is a left side view of a very small turning type turning work vehicle according to an embodiment of the present invention. The right side view of the upper part of the ultra small turning type turning work vehicle. The top view of a turntable frame. The rear view of an offset type working machine. The rear view of a 2nd boom.

5 Pivot frame 12 Step 66 Pedal 67 Pedal 68 Pedal 81 Front cover 83 Headlight

Claims (1)

  1. In a turning work vehicle having a step (12) on the front portion of the turntable frame (5) and arranging a front cover (81) covering the upper front of the step (12), the front cover (81) is viewed from the front. constitute convex headlamp (83) provided at the top center of the front view convex front cover (81), both side portions of the front cover (81), on the right and left sides of the step (12) A turning work vehicle characterized by being arranged in front of the arranged PTO operation pedal (67) and swing pedal (68) .
JP2005196831A 2005-07-05 2005-07-05 Swivel work vehicle Expired - Fee Related JP4540562B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2005196831A JP4540562B2 (en) 2005-07-05 2005-07-05 Swivel work vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2005196831A JP4540562B2 (en) 2005-07-05 2005-07-05 Swivel work vehicle

Publications (2)

Publication Number Publication Date
JP2007015464A JP2007015464A (en) 2007-01-25
JP4540562B2 true JP4540562B2 (en) 2010-09-08

Family

ID=37752997

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2005196831A Expired - Fee Related JP4540562B2 (en) 2005-07-05 2005-07-05 Swivel work vehicle

Country Status (1)

Country Link
JP (1) JP4540562B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6281377B2 (en) * 2014-03-31 2018-02-21 コベルコ建機株式会社 Light mounting structure for construction machinery

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54144644U (en) * 1978-03-31 1979-10-06
JPS56100148U (en) * 1979-12-28 1981-08-07
JP2002371591A (en) * 2001-06-15 2002-12-26 Shin Caterpillar Mitsubishi Ltd Light body of hydraulic backhoe
JP2003336290A (en) * 2002-05-20 2003-11-28 Yanmar Co Ltd Ultrasmall turning working machine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54144644U (en) * 1978-03-31 1979-10-06
JPS56100148U (en) * 1979-12-28 1981-08-07
JP2002371591A (en) * 2001-06-15 2002-12-26 Shin Caterpillar Mitsubishi Ltd Light body of hydraulic backhoe
JP2003336290A (en) * 2002-05-20 2003-11-28 Yanmar Co Ltd Ultrasmall turning working machine

Also Published As

Publication number Publication date
JP2007015464A (en) 2007-01-25

Similar Documents

Publication Publication Date Title
US8960805B2 (en) Work vehicle
EP1589153B1 (en) Swiveling utility machine having swivel deck
KR0182675B1 (en) Backhoe having an engine hood with a driver&#39;s seat mounted thereon
EP1666341B1 (en) Construction machine
EP1767706B1 (en) Backhoe
EP2180100A1 (en) Construction machine
JP4211919B2 (en) Hydraulic excavator counterweight
US8978812B2 (en) Construction machine
JP3845039B2 (en) Ultra-small turning work vehicle
US20110017537A1 (en) Working Vehicle
JP5814577B2 (en) Electric work vehicle and battery holding structure thereof
JP6189241B2 (en) Working machine
US20140034409A1 (en) Work Vehicle
KR100585924B1 (en) Construction machine
WO2009157236A1 (en) Loader work machine
JP4695017B2 (en) Construction machinery
JP5758338B2 (en) Working machine
JP4598192B2 (en) Construction machinery
JP4675181B2 (en) Combine
JP5015080B2 (en) Truck loader
US5711095A (en) Hydraulic working machine having a projecting portion
JP4542475B2 (en) Combine
DE60318095T2 (en) Combination of a rear door and a bumper throwable bonnet
KR101090637B1 (en) Operator&#39;s seat section structure of work machine
JP5341264B2 (en) Construction machinery

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20071128

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20090722

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20091110

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20091224

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20100615

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20100622

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130702

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130702

Year of fee payment: 3

S531 Written request for registration of change of domicile

Free format text: JAPANESE INTERMEDIATE CODE: R313531

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130702

Year of fee payment: 3

LAPS Cancellation because of no payment of annual fees