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WO2015108104A1 - Engin de chantier - Google Patents

Engin de chantier Download PDF

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Publication number
WO2015108104A1
WO2015108104A1 PCT/JP2015/050934 JP2015050934W WO2015108104A1 WO 2015108104 A1 WO2015108104 A1 WO 2015108104A1 JP 2015050934 W JP2015050934 W JP 2015050934W WO 2015108104 A1 WO2015108104 A1 WO 2015108104A1
Authority
WO
WIPO (PCT)
Prior art keywords
track frame
traveling
arm
work vehicle
machine body
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2015/050934
Other languages
English (en)
Japanese (ja)
Inventor
福元　健氏
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yanmar Co Ltd
Original Assignee
Yanmar Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2014006486A external-priority patent/JP2015134548A/ja
Priority claimed from JP2014006485A external-priority patent/JP2015134547A/ja
Priority claimed from JP2014006487A external-priority patent/JP2015134549A/ja
Priority claimed from JP2014006484A external-priority patent/JP2015134546A/ja
Application filed by Yanmar Co Ltd filed Critical Yanmar Co Ltd
Publication of WO2015108104A1 publication Critical patent/WO2015108104A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D55/00—Endless track vehicles
    • B62D55/06—Endless track vehicles with tracks without ground wheels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D55/00—Endless track vehicles
    • B62D55/08—Endless track units; Parts thereof
    • B62D55/10—Bogies; Frames
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D55/00—Endless track vehicles
    • B62D55/08—Endless track units; Parts thereof
    • B62D55/104—Suspension devices for wheels, rollers, bogies or frames
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D55/00—Endless track vehicles
    • B62D55/08—Endless track units; Parts thereof
    • B62D55/30—Track-tensioning means
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/96—Dredgers; Soil-shifting machines mechanically-driven with arrangements for alternate or simultaneous use of different digging elements
    • E02F3/961—Dredgers; Soil-shifting machines mechanically-driven with arrangements for alternate or simultaneous use of different digging elements with several digging elements or tools mounted on one machine
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/02—Travelling-gear, e.g. associated with slewing gears

Definitions

  • the present invention relates to a work vehicle such as a tractor in which left and right traveling crawlers are installed in the rear part of an airframe equipped with an engine or the like.
  • left and right traveling crawlers are installed at the lower part of a traveling vehicle body such as a tractor, and the front end side of the track frame is fixed to the front portion of the traveling vehicle body, and a rear axle case or the like.
  • a rear end side of a track frame is fixed to a rear portion of the traveling machine body, and a traveling crawler is supported on the traveling machine body via the track frame.
  • the left and right front wheels are installed in the front part of the aircraft, and the left and right traveling crawlers are installed in the rear part of the aircraft.
  • the travel part is pivotally mounted on the side of the traveling vehicle body such as the rear axle case by a single fulcrum fulcrum shaft disposed at an appropriate distance below the rear axle, and a traveling crawler (track frame)
  • a traveling crawler track frame
  • the present invention seeks to provide a work vehicle such as a tractor that has been improved by examining these current conditions.
  • a first aspect of the present invention provides a work vehicle including a traveling machine body on which an engine is mounted, a track frame provided at a rear lower side of the traveling machine body, and a traveling crawler attached to the track frame.
  • the track frame is divided into a front track frame and a rear track frame, and the front track frame and the rear track frame are connected to be extendable and contractible.
  • the traveling vehicle body includes a front arm and a rear arm that support the track frame, the front arm is connected to a front track frame, and the rear track frame is connected to the front arm.
  • the rear arm is connected.
  • the front end side of the rear track frame is slidably fitted to the rear end side of the front track frame so that the front track frame is interposed between the front track frame and the rear track frame.
  • a tension rod and a tension spring are arranged.
  • a rear arm is rotatably disposed on the axle case of the traveling machine body.
  • the front arm and the rear arm are arranged in a C shape in a side view between the traveling machine body and the track frame.
  • the rear arm is connected in a substantially vertical position between the traveling machine body and the track frame, while the front arm is tilted backward between the traveling machine body and the track frame. It is connected to the posture.
  • the tension spring for tensioning the traveling crawler is provided, and the tension spring includes an elastic stopper body that regulates an extension side of the tension spring.
  • the traveling crawler is configured to be tensioned by stretching the armature and deforming the elastic stopper body.
  • the extension operation of the front track frame and the rear track frame is regulated by the elastic stopper body.
  • the upper surface side of the spring box in which the tension spring is accommodated is formed on an inclined surface.
  • the traveling crawler is configured to be suspended independently by the front arm and the rear arm.
  • the invention according to claim 11 is the work vehicle according to claim 10, wherein the transmission case is provided with an axle via an axle case, and the rear arm is arranged to be rotatable around the axle. It is.
  • the connecting portion between the track frame and the front arm is disposed closer to the front portion of the traveling crawler than the connecting portion between the traveling machine body and the front arm. It is what you did.
  • the track frame is a front track frame. Since the front track frame and the rear track frame are extendably connected to each other, the front track frame and the rear track frame can be extended to support the traveling crawler in tension.
  • the traveling crawler can be supported in tension by using the weight of the vehicle body, and the tension mechanism for maintaining the tension of the traveling crawler can be reduced in size and simplified.
  • the traveling aircraft body includes a front arm and a rear arm that support the track frame, the front arm is connected to a front track frame, and the rear arm is connected to a rear track frame.
  • the traveling crawler can be supported in a stable posture, and the traveling performance in the field can be improved.
  • the front end side of the rear track frame is slidably fitted to the rear end side of the front track frame, and a tension rod and a tension spring are disposed between the front track frame and the rear track frame. Therefore, the traveling crawler can be tensioned by utilizing the weight of the vehicle body, and the tension mechanism such as the tension spring can be reduced in size and simplified.
  • the tension spring can also be used as a suspension, improving the ride comfort for the operator.
  • the rear arm is rotatably arranged on the axle case of the traveling machine body, the front and rear ground contact width of the traveling crawler can be changed based on the rear portion of the traveling crawler, Fluctuation of the ground pressure of the traveling crawler can be easily suppressed.
  • the front arm and the rear arm are arranged between the traveling machine body and the track frame in the shape of a letter C in a side view, a spring body for elastically pressing the front arm can be eliminated.
  • the tension of the traveling crawler can be maintained by utilizing the weight of the vehicle body.
  • the front arm is connected in a backward inclined posture between the traveling aircraft body and the track frame.
  • the front arm can be tilted by the weight of the vehicle body in the direction in which the traveling crawler is tensed, and the tension structure of the traveling crawler can be simplified.
  • a tension spring for tensioning the traveling crawler is provided, and an elastic stopper body that regulates an extension side of the tension spring is provided, and the tension spring is extended and the elastic stopper body is deformed. Since the traveling crawler is configured to be tensioned, when the traveling crawler is extended (tensed) by the compression spring repulsive force of the tension spring, excessive tension of the traveling crawler is prevented by the elastic stopper body.
  • the tension spring and the elastic stopper body can be used as a suspension, and the ride comfort of the operator can be improved.
  • the extension operation of the front track frame and the rear track frame is regulated by the elastic stopper body, the tension of the traveling crawler can be changed by linear motion of each track frame, The structure of the tension spring or the elastic stopper body can be simplified.
  • the upper surface side of the spring box in which the tension spring is accommodated is formed on the inclined surface, it is possible to reduce the accumulation of mud and the like on the upper surface side of the spring box during field work and the like. It is possible to prevent malfunction of the tension spring caused by drying and consolidation of the material, and to improve maintenance workability.
  • the traveling crawler since the traveling crawler is configured to be independently suspended by the front arm and the rear arm, the traveling traveling is performed at the time of assembling work for mounting a pair of left and right traveling crawlers on the traveling machine body. After assembling the left and right track frame unit bodies in a state where the crawler can be mounted, the left and right track frame unit bodies can be connected to the traveling machine body via the front arm and the rear arm. Assembling work of the traveling crawler can be simplified.
  • the transmission case has a structure in which the axle is disposed via the axle case, and the rear arm is disposed so as to be rotatable around the axle.
  • the track frame can be rotated around the axle, and the wetland running ability or the sudden stop function can be improved in field work or the like.
  • the connecting portion between the track frame and the front arm is arranged closer to the front portion of the traveling crawler than the connecting portion between the traveling machine body and the front arm, With the connecting portion between the traveling machine body and the front arm as a fulcrum, the connecting portion between the track frame and the front arm moves forward and upward, and the traveling crawler can be tensioned.
  • the tension mechanism of the traveling crawler can be reduced in size and simplified.
  • FIG. 10 is an enlarged explanatory view of FIG. 9. It is a perspective view of a track frame support part.
  • FIGS. 1 to 11 A farm tractor 1 as a work vehicle shown in FIGS. 1 to 4 is configured to perform a tilling work for plowing a farm field by attaching a tilling work machine 31 and the like via a hydraulic lift mechanism 30.
  • 1 is a left side view of the tractor 1
  • FIG. 2 is a plan view thereof
  • FIG. 3 is a side view of the crawler traveling device
  • FIG. 4 is a plan view of the same portion.
  • the left side in the forward direction of the tractor 1 is simply referred to as the left side
  • the right side in the forward direction is also simply referred to as the right side.
  • a farm tractor 1 as a work vehicle supports a traveling machine body 2 with a pair of left and right crawler traveling devices 3, and a diesel engine 5 is mounted on the front part of the traveling machine body 2.
  • the crawler traveling device 3 is driven by the engine 5 so as to travel forward and backward.
  • the upper surface side and the left and right side surfaces of the diesel engine 5 are covered with an openable / closable bonnet 6.
  • a driving cabin 7 is installed as a driving unit on which an operator gets on.
  • a front column 10 including a control seat 8 on which an operator sits, a control handle 9 as steering means, and the like.
  • the front column 10 is provided with left and right brake pedals, clutch pedals, shift pedals, forward / reverse switching levers, and the like as steering devices.
  • the traveling machine body 2 includes a transmission case 17 that transmits the output of the diesel engine 5 by the transmission shaft 16, and shifts the output from the diesel engine 5 and transmits it to the crawler traveling device 3.
  • a tiller 31 and the like can be moved up and down via a traction mechanism 21 such as a left and right lower link 18, a top link 19, and a left and right lift arm 20 provided in a hydraulic lift mechanism 30.
  • the PTO shaft 22 provided on the rear side surface of the transmission case 17 is driven by the tilling work machine 31 so that the tilling work can be performed.
  • the traveling machine body 2 of the tractor 1 includes a diesel engine 5, a transmission case 17, a vehicle body frame 23 that connects them, a front chassis 24 that extends forward from the diesel engine 5, and the like.
  • the front loader 32 can be attached to the front portion of the agricultural tractor 1 (the traveling machine body 2), and the bucket 33 of the front loader 32 is operated up and down so that the loader work can be executed.
  • left and right rear axle cases 34 are provided on both the left and right sides of the mission case 17, respectively.
  • the crawler traveling device 3 is detachably attached to the traveling machine body 2 and the rear axle case 34.
  • One end of the rear axle 35 is pivotally supported in the rear axle case 34, and then a reduction final gear (not shown) is pivotally supported on one end of the axle 35.
  • the other end side of the rear axle 35 is protruded from the rear axle case 34, and then a driving wheel body 36 is attached to the other end side of the axle 35.
  • a track frame 37 extending in the front-rear direction is disposed below the rear axle case 34.
  • the arm support member 38 is detachably fastened to the traveling machine body 2.
  • a front arm 39 pivotally supported on the arm support member 38 and a rear arm 40 pivotally supported on the rear axle case 34 are provided.
  • the arms 39 and 40 are mounted on the traveling machine body 2 and the transmission case 17.
  • the track frame 37 is connected to the rear axle case 34 so as to be rotatable (back and forth).
  • the track frame 37 is divided into a front track frame 41 and a rear track frame 42, and a connecting frame 43 is fixed to the front portion of the rear track frame 42.
  • a rear portion of the front track frame 41 is supported by a front portion of the frame 42 via a connecting frame 43 so as to be slidable in the front-rear direction.
  • a tension adjusting mechanism 44 is disposed on the upper surface of the connecting frame 43, and the front track frame 41 and the rear track frame 42 are connected to each other by the tension adjusting mechanism 44 so as to extend and contract.
  • the front driven wheel body 46 is attached to the front end side of the front track frame 41 via the front support shaft 45.
  • a rear driven wheel body 47 is attached to the rear end side of the track frame 37 by a rear support shaft 48.
  • a synthetic crawler traveling crawler 49 serving as a crawler belt is wound around the driving wheel body 36, the front driven wheel body 46, and the rear driven wheel body 47 in a substantially triangular shape.
  • a pair of left and right front arms 39 and a pair of left and right rear arms 40 for supporting a pair of left and right track frames 37 on the traveling machine body 2 are provided, and a pair of left and right traveling crawlers 49 are independently suspended.
  • the driving wheel body 36 (rear axle 35) is rotated forward or backward at an appropriate speed and the traveling crawler 49 is driven forward or backward to drive the traveling machine body 2 forward or backward. ing.
  • two sets of equalizer members 51 on which two wheels 50 are pivotally supported are provided, and two sets of equalizer members 51 are pivotally supported on the rear track frame 42.
  • Two sets of four rolling wheels 50 are rotatably provided on the rear track frame 42.
  • a plurality of wheels 50 are brought into contact with the inner peripheral surface between the front driven wheel body 46 and the rear driven wheel body 47 (the inner peripheral surface on the ground contact side of the traveling crawler 49). Let The plurality of wheels 50 are configured to support the landing side of the traveling crawler 49 on the ground.
  • the front equalizer member 51 is supported on the front end portion of the connecting frame 43 via the fulcrum shaft 52, and the fulcrum receiving bracket 53 is disposed on the rear end portion of the rear track frame 42. Then, the rear equalizer member 51 is supported by the fulcrum receiving bracket 53 via the fulcrum shaft 54.
  • the upper end side of the rear arm 40 is pivotally supported by the rear axle case 34, and the lower end side of the rear arm 40 is detachably fastened and fixed to the fulcrum receiving bracket 53 by a bolt 55. That is, the rear arm 40 is erected in a substantially vertical posture through the fulcrum receiving bracket 53 at the rear end portion of the rear track frame 42.
  • the left and right rear arms 40 are disposed so as to be rotatable around the left and right rear axles 35, and the rear end side of the track frame 37 is connected to the traveling machine body 2 via the rear arms 40 that are pivotally supported on the axis of the rear axle 35.
  • the retreat angle of the traveling crawler 49 supported by the equalizer wheel 50 disposed on the rear end side of the track frame 37 is configured to approximate the outer diameter locus of a general traveling wheel supported on the rear axle 35. is doing.
  • the upper end side of the front arm 39 is pivotally supported on the arm support member 38 on the outer side surface of the body frame 23 via the upper end pivot shaft 60, and the lower end is pivotally mounted on the inner side surface of the front track frame 41.
  • a lower end side of the front arm 39 is pivotally supported via a shaft 61 so that the front arm 39 is supported in a rearward inclined posture between the vehicle body frame 23 and the front track frame 41.
  • the connecting portion (lower end pivot shaft 61) between the track frame 37 and the front arm 39 is disposed closer to the front portion of the traveling crawler 49 than the connecting portion (upper end pivot shaft 60) between the traveling machine body 2 and the front arm 39.
  • the front arm 39 rotates around the upper pivot shaft 60, and the front arm 39, the lower end side of the rear arm 40 is moved directly below the rear axle 35 as the circumferential length of the traveling crawler 49 becomes longer with time. It is configured to shift from the initial state of the suspended substantially vertical posture to the forward inclined posture displaced to the rear side of the rear axle 35. That is, when the front and rear lengths of the front track frame 41 and the rear track frame 42 are increased, the front arm 39 and the rear arm 40 are supported in a C shape in a side view with respect to the traveling machine body 2.
  • the front arm 39 and the rear arm 40 are arranged in a letter C shape between the traveling body 2 and the front track frame 41 or the rear track frame 42.
  • the rear arm 40 rotates around the rear axle case 34 due to the movement, and the grounding posture of the traveling crawler 49 changes to the forward leaning posture or the backward leaning posture, for example, the farm field performing the tilling work is in contact with the traveling crawler 49.
  • the traveling crawler 49 is supported in a forwardly raised position, the angle of attack of the front part of the traveling crawler 49 is increased, and the traveling crawler 49 is in a forwardly lowered (backwardly raised) position.
  • the angle of attack of the rear portion of the traveling crawler 49 is increased, the fluctuation of the pitching of the traveling body 2 is suppressed, and the operation of the control seat 8 is suppressed. It is possible to reduce the before and after tilting of the data. Further, when the front track frame 41 and the rear track frame 42 are expanded and contracted due to the rotation of the front arm 39, for example, when traveling on an uneven road surface, the ground contact surface of the traveling crawler 49 is It can be deformed following the uneven road surface, and the body vibration accompanying traveling on the uneven road surface can be reduced. Therefore, the ride comfort of the operator who has boarded the control seat 8 can be maintained in a good state.
  • the front track frame 41 and the rear track frame 42 are based on the weight of the vehicle body 2 on the side of the traveling machine body 2 to which the tilling work machine 31 or the front loader 32 is detachably attached, or the amount of settlement of the traveling crawler 49 in the wet field.
  • the track frame 37 (the front track frame 41 and the rear track frame 42) is in a forwardly raised posture or a forwardly lowered posture due to running resistance during forward movement or reverse movement, etc. Therefore, while the tension of the traveling crawler 49 can be maintained substantially constant, the angle of attack of the traveling crawler 49 is ensured at an appropriate angle adapted to the traveling conditions, and the traveling crawler 49 is moved forward or backward. Runability can be improved. It is possible to easily prevent the traveling crawler 49 from being turned forward or rearward and increasing the running resistance.
  • the traveling crawler 49 receives the forward reaction force from the ground, whereby the track frame 37 is rotated forward around the rear axle 35, and the traveling crawler 49 is inclined to the forwardly raised posture. And move forward.
  • the tractor 1 is driven backward, by receiving a reverse reaction force from the ground, the track frame 37 is rotated backward around the rear axle 35, and the traveling crawler 49 is inclined in a forward-downward posture to move backward. Moving.
  • the tension adjusting mechanism 44 has an outer cylinder 65 fixed to the upper surface of the front part of the connection frame 43 (rear track frame 42), and can be freely inserted into and removed from the inner space of the outer cylinder body 65 through the front opening.
  • An inner cylinder 66 to be inserted a support plate 67 that closes the rear opening of the outer cylinder 65, a tension bolt 68 that is rotatably supported by the support plate 67, and a tension bolt 68 that extends inside the inner cylinder 66.
  • a slide cylinder 69 as a tension rod and a tension spring 72 are arranged between the front track frame 41 and the rear track frame 42.
  • the upper surface of the outer cylindrical body 65 is inclined so that the left and right ends are lowered, and the upper surface of the outer cylindrical body 65 is formed in a mountain shape (roof shape). The amount of mud that accumulates on the top surface is reduced.
  • a tension spring 72 is wound and supported on the outer peripheral side of the slide cylinder 69 in a loose fit.
  • a tension spring seat 70 is connected to a tension screw portion of the tension bolt 68 via a slide cylinder 69.
  • the ends of the tension bolts 68 are projected outward from the rear side of the support plate 67 (outer cylinder 65).
  • An idling prevention nut body 73 is screwed onto the protruding end thread portion of the tension bolt 68.
  • the angular head 68a for rotation operation is formed on the protruding end screw portion of the tension bolt 68.
  • the front end side of the slide cylinder body 69 is slidably projected in front of the inner cylinder body 66 and the spring receiving bracket body 71, and the elastic rubber stopper 74 is fitted on the front end portion of the slide cylinder body 69.
  • the front end side of the elastic pressure stopper body 74 is fixed to the slide cylinder 69 via the bolt 75 and the seat plate body 76, and the rear end side of the elastic pressure stopper body 74 is brought into contact with the front side of the spring receiving bracket body 71.
  • the rear end side of the tension bolt 68 is fixedly supported on the support plate 67 and the tension spring 72 is received by the tension spring seat 70.
  • an inner cylinder body 66 and a spring receiving bracket body 71 are provided as a part of the extendable front track frame 41 that supports the front driven wheel body 46.
  • the front and rear lengths of the outer cylinder body 65 and the inner cylinder body 66 are extended by the tension spring 72 so that the tension of the traveling crawler 25 is maintained substantially constant. It is composed.
  • an elastic pressure stopper body 74 is pressure-bonded to the front side of the spring receiving bracket body 71 provided at the front end portion of the slide cylinder body 69 by a tension spring 72, and the tension spring 72 and the elastic pressure stopper body on the slide cylinder body 69 are pressed.
  • the spring receiving bracket body 71 is clamped at 74, and the slide cylindrical body 69 is slidably supported by the spring receiving bracket body 71 so as to be slidable. Therefore, the front and rear lengths of the front track frame 41 and the rear track frame 42 change due to elastic deformation of the tension spring 72 and the elastic pressure stopper body 74, and the tension of the traveling crawler 25 is maintained substantially constant.
  • a rotation operation tool (not shown) is locked to the rotation operation square head 68a with the idling prevention nut 73 loosened, and the rotation operation tool is used.
  • the tension bolt 68 is rotated to change the connection length between the tension bolt 68 and the slide cylinder 69, and the tension spring 72 is adjusted by the tension bolt 68 to keep the tension of the traveling crawler 49 constant.
  • a work vehicle including a traveling machine body 2 on which the engine 5 is mounted, a track frame 37 provided on the lower rear side of the traveling machine body 2, and a traveling crawler 49 attached to the track frame 37.
  • the track frame 37 is divided into a front track frame 41 and a rear track frame 42, the front track frame 41 is connected to the traveling machine body 2 via a front arm 39, and the rear track 40 is connected to the traveling machine body 2 via a rear arm 40.
  • the frame 42 is connected, and the front track frame 41 and the rear track frame 42 are connected to be extendable.
  • the front track frame 41 and the rear track frame 42 can be extended by the weight of the vehicle body, and the traveling crawler 49 can be supported with appropriate tension, and the traveling performance of the traveling crawler 49 can be easily improved. Further, even when the traveling machine body 2 tilts back and forth, the forward and backward tilting of the track frame 37 (the ground contact surface of the traveling crawler 49) can be suppressed, and a good ride comfort for the operator who has boarded the control seat 8 can be maintained.
  • a rear arm 40 is rotatably arranged on the rear axle case 34 of the traveling machine body 2. Therefore, the front and rear ground contact width of the traveling crawler 49 can be changed with the rear portion of the traveling crawler 49 as a reference, and fluctuations in the ground contact pressure of the traveling crawler 49 can be easily suppressed.
  • the front arm 39 and the rear arm 40 are arranged in a letter C shape between the traveling body 2 and the track frame 37 in a side view. Therefore, a spring body that is elastically pressed against the front arm 39 can be eliminated, and the tension of the traveling crawler 49 can be maintained by utilizing the weight of the vehicle body.
  • the rear arm 40 is connected between the traveling machine body 2 and the track frame 37 in a substantially vertical position, while the front arm 39 is connected between the traveling machine body 2 and the track frame 37 in a backward tilted position. I am letting. Therefore, the front arm 39 can be tilted by the weight of the vehicle body in the direction in which the traveling crawler 49 is tensioned, and the tension structure of the traveling crawler 49 can be simplified.
  • a work vehicle including a traveling machine body 2 on which the engine 5 is mounted, a track frame 37 provided on the lower rear side of the traveling machine body 2, and a traveling crawler 49 attached to the track frame 37.
  • a tension spring 72 for tensioning the traveling crawler 49 is provided, and an elastic stopper body 74 for restricting the extension side of the tension spring 72 is provided.
  • the traveling crawler is formed by extension of the tension spring 72 and deformation of the elastic stopper body 74. 49 is configured to be tensioned.
  • the traveling crawler 49 when the traveling crawler 49 is extended (tensioned) by the repulsive force of the compression spring of the tension spring 72, excessive tension of the traveling crawler 49 can be prevented by the elastic stopper body 74, and the tension spring 72 and the elastic stopper body 74 are separated. It can also be used as a suspension, improving the ride comfort of the operator.
  • the track frame 37 is divided into a front track frame 41 and a rear track frame 42 so as to be extendable and contracted, and the extension operation of the front track frame 41 and the rear track frame 42 is applied to an elastic stopper 74.
  • the tension of the traveling crawler 47 can be changed by the linear motion of the track frames 41 and 42, and the structure of the tension spring 72 or the elastic stopper body 74 can be simplified.
  • a front track frame 41 is connected to the traveling machine body 2 via a front arm 39
  • a rear track frame 42 is connected to the traveling machine body 2 via a rear arm 40.
  • the rear track frame 42 is connected to be extendable. Therefore, the front track frame 41 and the rear track frame 42 can be extended by the weight of the vehicle body, and the traveling crawler 49 can be supported with appropriate tension, and the traveling performance of the traveling crawler 49 can be easily improved. Further, even when the traveling machine body 2 tilts back and forth, the forward and backward tilting of the track frame 37 (the ground contact surface of the front traveling crawler 49) can be suppressed, and a good ride comfort for the operator who has boarded the control seat 8 can be maintained.
  • the upper surface side of the outer cylindrical body 65 as a spring box in which the tension spring 72 is accommodated is formed on an inclined surface. Therefore, accumulation of mud and the like on the upper surface side of the outer cylindrical body 65 can be reduced during field work, etc., and malfunction of the tension spring 72 caused by drying and solidification of adhering mud can be prevented, and maintenance workability can be improved. It can be improved.
  • a work vehicle including a traveling machine body 2 on which the engine 5 is mounted, a track frame 37 provided on the lower rear side of the traveling machine body 2, and a traveling crawler 49 attached to the track frame 37.
  • the track frame 37 is divided into a front track frame 41 and a rear track frame 42, and the front track frame 41 and the rear track frame 42 are connected to be extendable. Therefore, the front track frame 41 and the rear track frame 42 can be extended to support the traveling crawler 49 in tension.
  • the traveling crawler 49 can be supported in tension by using the weight of the vehicle body, and the tension adjusting mechanism 44 for maintaining the tension of the traveling crawler 49 can be simplified in size.
  • the traveling machine body 2 includes a front arm 39 and a rear arm 40 for supporting the track frame 37, the front arm 39 is connected to a front track frame 41, and the rear arm is connected to a rear track frame 42. 40 are connected. Therefore, the traveling crawler 49 can be supported in a stable posture, and traveling performance in a field can be improved.
  • the front end side of the rear track frame 42 is slidably fitted on the rear end side of the front track frame 41, and a tension rod is provided between the front track frame 41 and the rear track frame 42.
  • the slide cylinder 69 and the tension spring 72 are arranged. Therefore, the traveling crawler 49 can be tensioned by utilizing the weight of the vehicle body, and the tension adjusting mechanism 44 such as the tension spring 72 can be reduced in size and simplified.
  • the tension spring 72 can also be used as a suspension, improving the ride comfort for the operator.
  • a rear arm 40 is rotatably disposed on the rear axle case 34 of the traveling machine body 2, and the front arm 39 and the rear arm 40 are disposed between the traveling machine body 2 and the track frame 37. It is arranged in a square shape when viewed from the side. Therefore, a spring body or the like that makes the front arm 39 elastic can be eliminated, the load of the tension spring 72 can be easily reduced, and the tension of the traveling crawler 49 can be properly maintained by utilizing the weight of the vehicle body.
  • a work vehicle including a traveling machine body 2 on which the engine 5 is mounted, a track frame 37 provided on the lower rear side of the traveling machine body 2, and a traveling crawler 49 attached to the track frame 37.
  • a pair of left and right front arms 39 and a pair of left and right rear arms 40 for supporting the pair of left and right track frames 37 on the traveling machine body 2 are provided, and the pair of left and right traveling crawlers 49 are independently suspended.
  • the unit body of the left and right track frames 37 is assembled in advance so that the traveling crawler 49 can be mounted, and then the front arm 39 and The unit bodies of the left and right track frames 37 can be connected via the rear arm 40.
  • the assembly work of the traveling crawler 49 can be simplified.
  • the left and right rear axles 35 are disposed in the transmission case 17 via the left and right rear axle cases 34, and can rotate around the left and right rear axles 35.
  • the left and right rear arms 40 are disposed on the left and right sides. Accordingly, the track frame 37 can be rotated around the rear axle 35 in response to a change in the contact pressure of the traveling crawler 49, and wet field running ability or a sudden stop function in farm work can be improved.
  • the connecting portion between the track frame 37 and the front arm 39 is arranged closer to the front portion of the traveling crawler 49 than the connecting portion between the traveling machine body 2 and the front arm 39. Therefore, the connecting portion (lower end pivot shaft 61) between the track frame 37 and the front arm 39 is moved forward by the vehicle body weight, with the connecting portion (upper pivot shaft 60) between the traveling machine body 2 and the front arm 39 as a fulcrum.
  • the traveling crawler 49 can be tensioned by moving upward.
  • the tension adjusting mechanism 44 of the traveling crawler 49 can be simplified and simplified.
  • the track frame 37 is divided into a front track frame 41 and a rear track frame 42, and the front track frame 41 is connected to the traveling machine body 2 via the front arm 39.
  • the rear track frame 42 is connected via the rear arm 40, and the front track frame 41 and the rear track frame 42 are connected to be extendable. Therefore, the front track frame 41 and the rear track frame 42 can be extended by the weight of the vehicle body, and the traveling crawler 49 can be supported with appropriate tension, and the traveling performance of the traveling crawler 49 can be easily improved.
  • the traveling machine body 2 tilts back and forth, the forward and backward tilting of the track frame 37 (the ground contact surface of the traveling crawler 49) can be suppressed, and a good ride comfort for the operator who has boarded the control seat 8 can be maintained.
  • a work vehicle including a traveling machine body 2 on which the engine 5 is mounted, a track frame 37 provided on the lower rear side of the traveling machine body 2, and a traveling crawler 49 attached to the track frame 37.
  • an equalizer wheel 50 that supports the traveling crawler 49 is provided on the rear end side of the track frame 37, and the reverse angle of the traveling crawler 49 supported by the equalizer wheel 50 is the outer diameter locus of the traveling wheel. It is configured to approximate. Therefore, it is possible to easily ensure reverse running performance on a wet field or a rough road where the traveling crawler 49 is likely to sink, and it is possible to easily improve the direction changing workability at the time of pillow in the field.
  • the rear arm 35 has a structure including a rear axle 35 for driving the traveling crawler 49 and a drive sprocket (drive wheel body 36), and is supported on the axis of the rear axle 35.
  • a rear end side of the track frame 37 is connected to the traveling machine body 2 via 40. Accordingly, the track frame 37 rotates around the rear axle 35 with respect to the front crawling or the rear rising subsidence of the traveling crawler 49 and the equalizer wheel 50 is displaced, so that the retreating angle of the traveling crawler 49 is set. It can be maintained properly.
  • the track frame 37 is formed by a front track frame 41 and a rear track frame 42 that can be expanded and contracted. Therefore, the tension of the traveling crawler 49 can be properly maintained by the forward and backward movement of the front track frame 41.
  • the traveling crawler 49 can be supported in tension by using the weight of the vehicle body, and the followability of the traveling crawler 49 with respect to the unevenness of the traveling road surface can be improved.
  • a front arm 39 and a rear arm 40 are arranged between the traveling body 2 and the front track frame 41 or the rear track frame 42 in a C shape in a side view. Therefore, a spring body that is elastically pressed against the front arm 39 can be eliminated, and the tension of the traveling crawler 49 can be maintained by utilizing the weight of the vehicle body.
  • a support structure for the wheels 50 arranged on the track frame 37 will be described.
  • a support cylinder 81 is fixed to the front and rear ends of the equalizer member 51 that is supported on the lower surface of the track frame 17 via a fulcrum shaft 52.
  • a roller shaft 83 is rotatably supported on the support cylinder 81 via a pair of bearings 82. Both end sides of the roller shaft 83 are projected from the left and right openings of the support cylinder 81 toward the left and right outer sides.
  • a pair of left and right rolling wheels 50 are fixed to both ends of the roller shaft 83 by fastening nuts 84.
  • a rubber seal 85 is provided outside the bearing bearing 82 in the left and right openings of the roller support cylinder 111.
  • the bearing bearing 82 is formed of a ball bearing in which a large amount of lubricant is held inside, so that it is not necessary to fill the lubricating grease.
  • the rubber seal 85 and the seal presser 86 are fitted on the outer peripheral side of the boss portion 50a of the roller wheel 50 on the outer peripheral side of the boss portion 50a to be inserted into the left and right openings of the support cylinder 81.
  • an O-ring 87 is fitted into the abutting portion between the side surface of the bearing bearing 82 and the end of the boss portion 50a.
  • An O-ring 88 is fitted into the butt portion.
  • the retaining ring 89 is locked to the opening end of the support cylinder 81, and the seal pressing body 86 is supported inside the opening of the support cylinder 81.
  • the support cylinder 81 is formed by cutting a hard stainless steel alloy pipe.
  • the seal pressing body 86 is formed by molding a material softer than the support cylinder 81 (aluminum alloy, plastic, or cast iron). Formed by casting.
  • the seal pressing body 86 as a bearing retaining body is formed of a soft material compared to the cast iron roller 50.
  • a labyrinth ring groove 50b is formed on the outer peripheral surface of the boss portion 50a of the roller wheel 50 on the outer peripheral surface of the boss portion 50a facing the inner hole surface of the seal presser 86, and the labyrinth ring groove 50b is formed.
  • a plurality of thin labyrinth rings 90 made of spring steel are fitted, and the outer peripheral surface side of the labyrinth ring 90 is slidably brought into contact with the inner hole surface of the seal presser 86.
  • a support cylinder 81 as a bearing cylinder of the track frame 37 is provided.
  • a support shaft (roller shaft 83) is rotatably supported by a bearing bearing 82, and the wheel 50 is fastened and fixed to the end of the roller shaft 83, and on the inner peripheral side of the support cylinder 81.
  • a seal presser body 86 which is a bearing retaining body is inserted, and the labyrinth ring 90 is slidably brought into contact with the shaft hole surface of the seal presser body 86.
  • the labyrinth ring 90 is attached with the smallest radial / axial gap in the labyrinth ring groove 50b, and the labyrinth ring 90 suppresses intrusion of muddy water and prevents the rubber seal 85 from being damaged.
  • the traveling machine body 2 on which the engine 5 is mounted, the track frame 37 provided on the lower rear side of the traveling machine body 2, and the track frame 37 are mounted via the wheels 50.
  • the labyrinth ring groove 50b is formed on the outer periphery of the boss portion 50a of the wheel 50, and the labyrinth ring 90 is fitted into the labyrinth ring groove 50b. Therefore, it is not necessary to insert grease into the bearing portion 82 of the roller 50, and it is possible to eliminate problems such as leakage of the grease and simplify maintenance work such as replenishment of the grease. Can be
  • a roller shaft 83 as a support shaft is rotatably supported on a bearing cylinder (supporting cylinder 81) of the track frame 37 via a bearing bearing 82.
  • the roller 50 is fastened and fixed to the end of the body 83, and a seal presser body 86 as a bearing retaining body is inserted into the inner peripheral side of the support cylinder 81 (bearing cylinder), and the seal presser body 86 is inserted.
  • the labyrinth ring 90 is slidably brought into contact with the shaft hole surface. Accordingly, the waterproof / mudproof function of the labyrinth ring 90 can be easily improved while the structure of the bearing 82 can be simplified.
  • the rolling wheel 50 is formed by casting, and the seal pressing body 86 is formed of a softer material than the rolling wheel 50. Therefore, the seal presser body 86 can be formed of aluminum die cast or synthetic resin, and the rust prevention of the seal presser body 86 can be made unnecessary.
  • traveling machine body diesel engine 34 rear axle case 35 rear axle 37 track frame 39 front arm 40 rear arm 41 front track frame 42 rear track frame 49 traveling crawler 65 outer cylinder (spring box) 69 Slide cylinder (tension rod) 72 Tension spring

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Harvester Elements (AREA)

Abstract

La présente invention concerne un engin de chantier apte à supporter en tension un dispositif d'entraînement à chenille (49) en utilisant un poids de châssis à vide ou similaire, et apte à simplifier et à réduire la taille d'un mécanisme d'ajustement de tension (44) destiné à maintenir la force de tension du dispositif d'entraînement à chenille (49). Ledit engin de chantier est doté d'un corps de dispositif d'entraînement (2) dans lequel est monté un moteur (5), d'un cadre de chenille (37) disposé sur le côté inférieur de la section arrière du corps de dispositif d'entraînement (2), et d'une chenille d'entraînement (49) monté sur le cadre de chenille (37). Ledit cadre de chenille (37) est formé de manière à être divisé en un cadre de chenille avant (41) et un cadre de chenille arrière (42), ledit cadre de chenille avant (41) et le cadre de chenille arrière (42) étant connectés l'un à l'autre de façon à pouvoir se déployer et se contracter.
PCT/JP2015/050934 2014-01-17 2015-01-15 Engin de chantier Ceased WO2015108104A1 (fr)

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
JP2014-006485 2014-01-17
JP2014006486A JP2015134548A (ja) 2014-01-17 2014-01-17 作業車両
JP2014-006484 2014-01-17
JP2014006485A JP2015134547A (ja) 2014-01-17 2014-01-17 作業車両
JP2014006487A JP2015134549A (ja) 2014-01-17 2014-01-17 作業車両
JP2014-006487 2014-01-17
JP2014-006486 2014-01-17
JP2014006484A JP2015134546A (ja) 2014-01-17 2014-01-17 作業車両

Publications (1)

Publication Number Publication Date
WO2015108104A1 true WO2015108104A1 (fr) 2015-07-23

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ID=53542990

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2015/050934 Ceased WO2015108104A1 (fr) 2014-01-17 2015-01-15 Engin de chantier

Country Status (1)

Country Link
WO (1) WO2015108104A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220315137A1 (en) * 2020-01-14 2022-10-06 Kubota Corporation Crawler traveling device, and working machine including crawler traveling device

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08282560A (ja) * 1995-04-13 1996-10-29 Hitachi Constr Mach Co Ltd 履帯張り調整装置
WO2003042022A1 (fr) * 2001-11-13 2003-05-22 Hitachi Construction Machinery Co., Ltd. Chassis pour chenille equipant des engins de chantier
JP2004345380A (ja) * 2003-05-20 2004-12-09 Komatsu Ltd 建設機械のクローラフレーム
JP2010000838A (ja) * 2008-06-18 2010-01-07 Kubota Corp クローラ走行装置
US20100060075A1 (en) * 2006-12-12 2010-03-11 Hansen Ronald S Conversion System for a Wheeled Vehicle
JP2013086715A (ja) * 2011-10-20 2013-05-13 Yanmar Co Ltd 作業車両

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08282560A (ja) * 1995-04-13 1996-10-29 Hitachi Constr Mach Co Ltd 履帯張り調整装置
WO2003042022A1 (fr) * 2001-11-13 2003-05-22 Hitachi Construction Machinery Co., Ltd. Chassis pour chenille equipant des engins de chantier
JP2004345380A (ja) * 2003-05-20 2004-12-09 Komatsu Ltd 建設機械のクローラフレーム
US20100060075A1 (en) * 2006-12-12 2010-03-11 Hansen Ronald S Conversion System for a Wheeled Vehicle
JP2010000838A (ja) * 2008-06-18 2010-01-07 Kubota Corp クローラ走行装置
JP2013086715A (ja) * 2011-10-20 2013-05-13 Yanmar Co Ltd 作業車両

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220315137A1 (en) * 2020-01-14 2022-10-06 Kubota Corporation Crawler traveling device, and working machine including crawler traveling device

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