WO2013001845A1 - 作業車両 - Google Patents
作業車両 Download PDFInfo
- Publication number
- WO2013001845A1 WO2013001845A1 PCT/JP2012/052757 JP2012052757W WO2013001845A1 WO 2013001845 A1 WO2013001845 A1 WO 2013001845A1 JP 2012052757 W JP2012052757 W JP 2012052757W WO 2013001845 A1 WO2013001845 A1 WO 2013001845A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- link
- traveling
- driven wheel
- track frame
- work vehicle
- Prior art date
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Classifications
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D55/00—Endless track vehicles
- B62D55/02—Endless track vehicles with tracks and additional ground wheels
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- 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
- B62D55/084—Endless-track units or carriages mounted separably, adjustably or extensibly on vehicles, e.g. portable track units
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D55/00—Endless track vehicles
- B62D55/08—Endless track units; Parts thereof
- B62D55/14—Arrangement, location, or adaptation of rollers
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- 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
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- 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
- B62D55/305—Track-tensioning means acting on pivotably mounted idlers
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 a traveling machine body on which an engine or the like is mounted.
- the left and right traveling crawlers are installed at the rear part of the traveling machine body in the work vehicle, that is, the left and right front wheels are installed at the front part of the traveling machine body, and the left and right traveling crawlers are installed at the rear part of the traveling machine body.
- Patent Documents 1 to 3 are described in Patent Documents 1 to 3 as prior art.
- the rear axle is pivotally supported on the rear axle case of the traveling machine body, and the drive wheel body is attached to the rear axle, while the track frame extending in the front-rear direction is disposed in a portion below the rear axle case,
- the track frame is pivotally mounted on a fulcrum shaft so that the front and rear portions of the track frame can move up and down in opposite directions.
- a traveling crawler is wound around the driving wheel body in a substantially triangular shape across the front driven wheel body provided on the front end side of the track frame, the rear driven wheel body provided on the rear end side, and the driving wheel body.
- the traveling machine body is moved forwardly or backwardly by being driven to rotate.
- the load is concentrated on the swing fulcrum shaft because the track frame is a heavy product made of square pipe and the track frame is supported by the swing fulcrum shaft at one point. It is easy to perform, and there is a risk of causing a malfunction due to deformation of the swinging fulcrum shaft portion.
- the traveling crawler inclines forward or backward with respect to the swing fulcrum shaft portion when climbing over a convex portion such as a basket in the field, and the front / rear inclination angle of the ground contact surface of the traveling crawler Therefore, the height of the traveling machine body with respect to the ground is also likely to change, and there is a problem that it is not possible to maintain a good ride comfort for the operator who has boarded the control seat.
- the present invention seeks to provide a work vehicle that has been improved by examining the current situation as described above.
- the invention of claim 1 includes a traveling machine body equipped with an engine, a track frame provided at a lower portion of the traveling machine body, and a traveling crawler mounted on the track frame via a driving wheel body and a driven wheel body.
- the track frame has a structure in which a pair of steel plate bodies having wide surfaces facing each other are detachably fastened by a fastening member.
- a mounting portion of a rolling wheel support that rotatably supports the rolling wheel for grounding the traveling crawler is sandwiched between the pair of steel plate bodies. It is that.
- the crawler guide body for preventing the traveling crawler from coming off and holding down the metal core body is sandwiched between the pair of steel plate bodies.
- the driven wheel body includes a pair of front and rear, and a base end portion of a stretchable tension adjusting mechanism that supports the front driven wheel body is the pair of steel plates. It is said to be pinched by the body.
- a base end portion of a pivot member that pivotally supports the rear driven wheel body is sandwiched between the pair of steel plate bodies.
- a link support is attached to a rear axle case that transmits rotational power to the drive wheel body, and the track frame includes a pair of front and rear links. While being connected to the link support body through a member so as to be able to swing back and forth, the driven wheel body has a pair of front and rear, and the lower end side of the rear link member rotates on the rotation support shaft of the rear driven wheel body. It is pivotally supported as possible.
- the rotating support shaft protrudes from the rear driven wheel body to the left and right center side, and the lower end side of the rear link member is rotated to the protruding portion.
- the rear driven wheel body is supported in a cantilever manner by pivotally supporting it.
- the link support is attached to the left and right outermost portions of the rear axle case.
- more than half of the front and rear link members are accommodated within the lateral width of the traveling crawler when viewed from the traveling direction of the traveling machine body. It is that.
- a lower link mounting pin that pivotally supports a proximal end side of a lower link provided at a rear portion of the traveling machine body is extended outward in the left-right direction, One end side of the lower link mounting pin is detachably supported by the transmission case, and the other end side is detachably supported by the link support.
- a traveling machine body on which an engine is mounted, a track frame provided at a lower portion of the traveling machine body, and a traveling crawler mounted on the track frame via a driving wheel body and a driven wheel body.
- the track frame has a structure in which a pair of steel plate bodies having wide surfaces facing each other are detachably fastened by a fastening member. The weight can be significantly reduced compared to. Moreover, the workability of assembling the traveling crawler can be improved. And since the said track frame consists of a pair of steel plate body which faced the wide surfaces, mud is hard to come off to the right and left of the said traveling crawler at the time of traveling, and can exhibit an effect in prevention of skidding.
- the mounting portion of the rolling wheel support that rotatably supports the rolling wheel for grounding the traveling crawler is sandwiched between the pair of steel plate bodies,
- the mounting portion can be used as a strength member of the track frame, and the rigidity of the track frame can be increased.
- the workability of assembling the rolling wheels with respect to the track frame is also good.
- the crawler guide body for preventing the traveling crawler from coming off and holding the metal core body is sandwiched between the pair of steel plate bodies, the crawler guide is the same as in the case of claim 2.
- the body can be used as a strength member of the track frame, which contributes to an improvement in the rigidity of the track frame.
- the base end portion of the tension adjusting mechanism can be used as the strength member of the track frame, which can contribute to the improvement of the rigidity of the track frame.
- the base end portion of the shaft support member that pivotally supports the rear driven wheel body is sandwiched between the pair of steel plate bodies, this case is also the case of claims 2 to 4.
- the base end portion of the shaft support member can be used as a strength member of the track frame, which can contribute to improving the rigidity of the track frame.
- a link support is attached to a rear axle case that transmits rotational power to the drive wheel body, and the track frame is connected to the link support via a pair of front and rear link members. Since the driven wheel body is coupled to the front and rear, and the lower end side of the rear link member is pivotally supported on the rotation support shaft of the rear driven wheel body.
- the rotation support shaft of the rear driven wheel can be shared as a lower fulcrum of the rear link member, and a connection support structure for the track frame and the rear link member, and hence the connection between the track frame and the traveling machine body It is possible to simplify the support structure, reduce the weight, and reduce the number of parts.
- the rotation support shaft protrudes from the rear driven wheel body toward the left and right center side, and the lower end side of the rear link member is pivotally supported by the protrusion so that the rear Since the driven wheel is supported in a cantilever shape, the effect of claim 6 can be further promoted. That is, it is effective in terms of simplifying the connection support structure between the rear driven wheel body and the rear link member and improving the assembling workability.
- the link support body is attached to the left and right outermost portions of the rear axle case, it is possible to reduce the protrusion of the front and rear link members protruding from the traveling crawler to the left and right center side.
- the adhesion of mud to the front and rear link members can be suppressed, and problems such as interference with members around the front and rear link members that swing back and forth can be reduced.
- the front and rear link members are accommodated within the lateral width of the traveling crawler as viewed in the traveling direction of the traveling aircraft body, During the work, the front and rear link members can be supported while being sufficiently separated from the reeds and tall crops, and it is easy to avoid the risk of breaking the reeds or defeating the tall crops by the front and rear link members.
- the lower link mounting pin that pivotally supports the base end side of the lower link provided at the rear portion of the traveling machine body is extended leftward and rightward, and one end side of the lower link mounting pin is used as a transmission case. Since it is detachably supported and the other end side is detachably supported by the link support, the attachment support structure of the lower link can be simplified, and the detachability workability of the lower link and thus various working machines is improved. At the same time, the number of parts can be reduced, contributing to cost reduction.
- the tractor 10 of the embodiment includes a traveling machine body 11, a pair of left and right front wheels 12 that support the front part of the traveling machine body 11, and a pair of left and right that support the rear part of the traveling machine body 11. And a rear crawler travel device 13.
- the traveling body 11 is equipped with an engine 8 and a control seat 9.
- a mission case 40 is mounted on the rear part of the traveling machine body 11.
- Left and right rear axle cases 14 are provided on both left and right sides of the mission case 40.
- a rear crawler traveling device 13 is detachably attached to the traveling machine body 11 via a rear axle case 14.
- one end side of the rear axle 15 is pivotally supported in the rear axle case 14, and the other end side of the rear axle 15 is protruded outward from the rear axle case 14.
- a driving wheel body 16 is attached to the other end side of the rear axle 15.
- a track frame 17 extending in the front-rear direction is disposed below the rear axle case 14.
- a link support 18 is fastened and fixed to the rear axle case 14 in a detachable manner.
- a front link member 19 disposed on the front side of the rear axle 15 and a rear link member 20 disposed on the rear side of the rear axle 15 are provided.
- the track frame 17 is connected to the link support 18 via the link members 19 and 20 so as to be movable back and forth.
- a front driven wheel body 21 is attached to the front end side of the track frame 17 via a tension adjusting mechanism 22.
- the front driven wheel body 21 is rotatably supported by the bifurcated forearm 121 constituting the front end side of the tension adjusting mechanism 22.
- the rear driven wheel body 23 is attached to the rear end side of the track frame 17 via a bifurcated rear arm 122 as a shaft support member.
- the rear driven wheel body 23 of the embodiment is rotatably supported on the rear end side of the bifurcated rear arm 122.
- Synthetic rubber traveling crawlers 25 serving as crawler belts are wound around the driving wheel body 16, the front driven wheel body 21, and the rear driven wheel body 23 in a substantially triangular shape.
- the driving wheel body 16 (rear axle 15) is rotated forward or backward at an appropriate speed, and the traveling crawler 25 is driven forward or backward to drive the traveling machine body 11 forward or backward. Yes.
- a plurality of rolling wheels 26 and a crawler guide body 41 are provided.
- the plurality of rolling wheels 26 are rotatably provided on the track frame 17.
- the crawler guide body 41 is used to prevent the traveling crawler 25 from coming off in the left-right direction and to hold down a plurality of metal cores 95 (see FIGS. 7 and 8) embedded in the traveling crawler 25 at equal intervals.
- the track frame 17 is fastened and fixed.
- a plurality of rolling wheels 26 and a crawler guide are arranged on an inner peripheral surface (an inner peripheral surface on the grounding side of the traveling crawler 25) between the front driven wheel body 21 and the rear driven wheel body 23 among the inner peripheral surface of the traveling crawler 25.
- the body 41 is brought into contact.
- the crawler guide body 41 is formed in an inverted T shape when viewed from the side.
- a lower central portion of the crawler guide body 41 that is, a portion between the front rolling wheel 26 and the central rolling wheel 26 in the crawler guide body 41 is recessed upward, and contact with the grounding side of the traveling crawler 25 is prevented. It is avoiding.
- front and rear upper end pivot shafts 27 and 28 are provided on the link support 18. Front and rear upper end pivot shafts 27 and 28 are extended in parallel with the rear axle 15. An upper end boss portion of the front link member 19 is rotatably supported on the front upper end pivot shaft 27. The upper end side boss portion of the rear link member 20 is rotatably supported on the rear upper end pivot shaft 28. Front and rear lower pivot shafts 30 and 31 are provided on the track frame 17 side. A lower end side of the front link member 19 is rotatably connected to the track frame 17 by a front lower end pivot shaft 30. The front side of the track frame 17 is supported in the form of a cantilever by a front link member 19 and a front lower end pivot shaft 30. The front lower end pivot attachment shaft 30 is positioned on the front side with respect to the front upper end pivot attachment shaft 26, and the front link member 19 is supported while being inclined obliquely forward and downward.
- the rotational support shaft of the rear driven wheel body 23 pivotally supported by the bifurcated rear arm 122 that is, the rear lower end pivot shaft 31 is located on the left and right center side (from the rear driven wheel body 23). It protrudes to the left and right inside.
- the protruding portion of the rear lower end pivot shaft 31 is rotatably inserted and attached to the lower end side of the rear link member 20.
- the rear driven wheel body 23 is supported in a cantilever shape by the rear link member 20 and the rear lower end pivot shaft 31.
- the rear lower end pivot shaft 31 is positioned on the rear side of the rear upper pivot shaft 28, and the rear link member 20 is supported obliquely downward and rearward.
- the rear lower end pivot shaft 31 is protruded from the rear driven wheel 23 to the left and right sides, and the lower end of the rear link member 20 is pivotally supported by the left and right protrusions so that the rear driven wheel 23 can be rotated.
- You may support in the form of a doubly supported beam. In this case, the rear driven wheel body 23 can be more stably supported by the rear link member 20.
- the front and rear link members 19 and 20 are in a C-shaped posture that spreads toward the end in a side view of the tractor 10 (see FIG. 3).
- the traveling crawler 25 is substantially triangular in that the distance from the vertical line passing through the rear axle 15 to the front driven wheel body 21 is larger than the distance from the vertical line to the rear driven wheel body 23 in a side view of the tractor 10. Stretched in shape.
- the traveling crawler 25 receives the forward reaction force from the ground, whereby the track frame 17 moves forward with respect to the traveling machine body 11, and the traveling crawler 25 moves forward.
- the front link member 19 rotates in the tilting direction in which the inclination angle with respect to the horizontal plane becomes small with the front upper end pivot shaft 27 as a fulcrum.
- the rear link member 20 rotates in the standing direction in which the inclination angle with respect to the horizontal plane is increased with the rear upper end pivot shaft 28 as a fulcrum.
- the tractor 10 (the traveling machine body 11) moves forward while the traveling crawler 25 is inclined forward.
- the traveling crawler 25 receives the reverse reaction force from the ground, so that the track frame 17 moves backward with respect to the traveling machine body 11, and the traveling crawler 25 is inclined to the forward descending posture.
- the front link member 19 rotates in the standing direction so that the inclination angle with respect to the horizontal plane is increased with the front upper end pivot shaft 27 as a fulcrum.
- the rear link member 20 rotates in the direction of falling sideways so that the inclination angle with respect to the horizontal plane becomes smaller with the rear upper end pivot shaft 28 as a fulcrum.
- the tractor 10 (the traveling machine body 11) moves backward while tilting the traveling crawler 25 forward and downward.
- the driving of the traveling crawler 25 on the inner side of the turn is interrupted and the left side or the right side of the turning crawler moves.
- the traveling crawler 25 on the inner side of the turning inclines forward and downward, and in the case of backward traveling, the inner side of the turning.
- the traveling crawler 25 is inclined forwardly.
- the link support body 18 that rotatably supports the upper end sides of both the front and rear link members 19 and 20 serves as a stopper that restricts the front and rear rotation range of each link member 19 and 20.
- the regulation pins 34a, 34b, 35a, 35b are provided.
- a range in which the lower end side of the front link member 19 rotates back and forth with the front upper end pivot shaft 27 as a fulcrum is set by the first front restriction pin 34a and the first rear restriction pin 34b.
- a range in which the lower end side of the rear link member 20 pivots back and forth with the rear upper end pivot shaft 28 as a fulcrum is set by the second front restriction pin 35a and the second rear restriction pin 35b.
- the forward and backward movement of the traveling crawler 25 relative to the traveling machine body 11 is restricted by the front and rear restricting pins 34a, 34b, 35a, and 35b.
- the front link member 19 rotates in the sideways direction in which the tilt angle with respect to the horizontal plane becomes small with the front lower end pivot shaft 30 as a fulcrum.
- the rear link member 20 rotates with respect to the track frame 17 in a standing direction in which an inclination angle with respect to a horizontal plane is increased with the rear lower end pivot shaft 31 as a fulcrum.
- the traveling crawler 25 is supported in a forward ascending posture with respect to the traveling machine body 11.
- the front link member 19 rotates in the standing direction in which the inclination angle with respect to the horizontal plane increases with the front lower end pivot shaft 30 as a fulcrum.
- the rear link member 20 is rotated in a falling direction in which the inclination angle with respect to the horizontal plane is small with the lower end pivot shaft 31 as a fulcrum.
- the traveling crawler 25 is supported in a forward and downward posture with respect to the traveling machine body 11.
- the “instantaneous center” moves to the rear side of the traveling aircraft body 11 when the traveling aircraft body 11 performs a forward and downward pitching operation.
- the traveling machine body 11 performs a pitching operation in the forward direction
- the traveling machine body 11 moves to the front side of the traveling machine body 11.
- the “instantaneous center” is held at a height position approximate to the height of the rear axle 15. For this reason, when the traveling machine body 11 pitches, the distance that the traveling machine body 11 moves back and forth with respect to the track frame 17 can be greatly reduced as compared to the longitudinal movement distance in the case of the prior art.
- the tractor 10 includes a rotary tiller working machine 1 having a rotary tillage claw 2.
- the lower link 3 and the top link 4 (three-point link mechanism) are projected rearward from the rear portion of the traveling machine body 11, and the rotary tiller working machine 1 is mounted on the lower link 3 and the top link 4.
- a hydraulic lift mechanism 5 is provided at the rear part of the traveling machine body 11 (upper part of the transmission case 40).
- a front and rear intermediate portion of the lower link 3 is connected to a lift arm 6 of the hydraulic lift mechanism 5 via a lift rod 7.
- the rotary tiller working machine 1 is moved up and down by the operation of the hydraulic lift mechanism 5, while the rotary tillage claw 2 is driven to cultivate the agricultural field.
- the track frame 17 has a pair of left and right steel plate bodies 123 in a flat plate shape in which the wide surfaces face each other. Both steel plate bodies 123 are formed in the same shape on the left and right. The two steel plate bodies 123 are opposed to each other with the wide surfaces facing each other at an appropriate interval in the left-right direction so that the thickness direction is in the left-right direction parallel to the rear axle 15. For this reason, a relatively wide area on the inner peripheral lower side of the traveling crawler 25 is covered with the wide surface of the steel plate body 123 (see FIG. 3, which is closed).
- a rolling wheel support 124 that rotatably supports each rolling wheel 26 is disposed on the lower side between the steel plate bodies 123. Roller shafts 125 protrude from the rolling wheel support 124 to the left and right sides. Rolling wheels 26 are connected to the left and right projecting ends. In the embodiment, three rolling wheel supports 124 are provided side by side. Therefore, there are a total of three sets (six) of the rolling wheels 26 with two sets.
- a mounting portion 126 formed on the upper side of each rolling wheel support 124 is positioned between both steel plate bodies 123. In a state in which the attachment portions 126 of the respective rolling wheel supports 124 are sandwiched between the two steel plate bodies 123, the attachment portions 126 are fastened to both the steel plate bodies 123 by bolts 127.
- a crawler guide body 41 is disposed between the front rolling wheel support 124 and the center rolling wheel support 124.
- the crawler guide body 41 is formed in an inverted T shape when viewed from the side.
- the upper side 128 of the crawler guide body 41 is located between the two steel plate bodies 123. In a state where the upper side 128 is sandwiched between the two steel plate bodies 123, the bolts 129 are fastened to the two steel plate bodies 123 in a both-sided manner.
- a front base bracket 130 provided at the base end portion (the rear lower surface side) of the tension adjusting mechanism 22 is disposed on the upper front portion between the two steel plate bodies 123. With the front pedestal bracket 130 clamped by both steel plate bodies 123, the front pedestal bracket 130 is fastened to both the steel plate bodies 123 in a both-sided manner so that the tension adjusting mechanism 22 is provided on the front end side of the track frame 17. A front driven wheel body 21 is attached.
- a rear base bracket 132 provided on the base end portion (front end side) of the bifurcated rear arm 122 which is a pivotal support member is disposed on the rear end side between the two steel plate bodies 123.
- the rear base bracket 132 is fastened to both the steel plate bodies 123 in a double-sided manner with bolts 133, so that the bifurcated rear arm 122 is formed on the rear end side of the track frame 17.
- a rear driven wheel body 23 is attached via the.
- each member sandwiched between the two steel plate bodies 123 that is, the mounting portion 126 of the rolling wheel support 124, the upper side 128 of the crawler guide body 41, and the front and rear pedestal brackets 130, 132 are the wide widths of both the steel plate bodies 123. It plays the role of a spacer that faces the surfaces in the left-right direction at appropriate intervals.
- These members 126, 128, 130 and 132 also function as strength members of the track frame 17.
- Each of the bolts 127, 129, 131, 133 described above constitutes the fastening member described in the claims.
- a pivot bearing cylinder 134 as a bearing member to be fitted on the front lower pivot shaft 30 is disposed above the upper side 128 of the crawler guide body 41 between the steel plate bodies 123.
- the left and right ends of the pivot bearing cylinder 134 penetrate the left and right steel plate bodies 123, respectively.
- a flange portion 135 is welded and fixed to the outer peripheral side of the pivot bearing cylinder 134. In a state where the flange portion 135 is in contact with the inwardly wide surface of the left and right outer steel plate bodies 123, the bolts 136 are fastened to the left and right outer steel plate bodies 123 in a cantilever manner.
- the front lower end pivot shaft 30 is passed through both the steel plate bodies 123 and the pivot bearing cylinder 134, and the front lower pivot shaft 30 is inserted and fixed to the pivot bearing cylinder 134.
- the link support 18 is attached to the left and right outermost portions of the rear axle case 14, and first and second brackets made of flat steel plates that sandwich the rear axle case 14 from the front and rear. It has the bodies 51 and 52 and the 3rd bracket body 53 made from a flat steel plate.
- the first and second bracket bodies 51 and 52 are fastened to the rear axle case 14 with a plurality of bolts 137 (four in the embodiment) with the rear axle case 14 sandwiched from the front and rear.
- Bolts 159 are directly fastened to the rear axle case 14 at the front and upper sides of the first bracket body 51.
- the first bracket body 51 and the second bracket body 52 are not only tightened together with a bolt 137, but also pass through a screw portion formed on one end side of the second rear regulating pin 35b, and the screw portion is passed through a nut ( (Not shown) They are also clamped and fixed to each other by fastening.
- a screw portion formed on the other end side of the second rear regulating pin 35b passes through the third bracket body 53 and is fastened with a nut 140. That is, the screw portions at both ends of the second rear restricting pin 35b are fastened to the first and second bracket bodies 51 and 52 and the third bracket body 53 in a doubly supported manner.
- first front regulating pin 34a is fastened to the first and second bracket bodies 51, 52 and the third bracket body 53 in a nut-supported manner by the nut 138, and the first rear regulating pin
- the screw portions at both ends of 34 b are also fastened to the first and second bracket bodies 51, 52 and the third bracket body 53 in a nut-supported manner by a nut 139.
- the third bracket body 53 is positioned below the rear axle 15, and the upper side of the third bracket body 53 is fastened to the rear axle case 14 with a bolt 142 via a pair of front and rear L-shaped brackets 141.
- One end side of the front and rear upper pivot shafts 27 and 28 is penetrated and supported by the first bracket body 51 with the front and rear upper pivot shafts 27 and 28 passing through the upper boss portions of the front and rear link members 19 and 20. I am letting.
- the other end sides of the front and rear upper end pivot shafts 27 and 28 are fastened to the third bracket body 53 in a cantilevered manner via the shaft pressing plate body 143.
- the front and rear link members 19, 20 are accommodated within the lateral width of the traveling crawler 25 as viewed from the traveling direction of the traveling machine body 11.
- each link member 19, 20 protrudes from the traveling crawler 25 to the left and right center side, but the lower end side (boss portion) of each link member 19, 20 is the traveling crawler. It is within 25 horizontal widths.
- a seat plate body 145 is fixed to the upper side of the first bracket body 51 by welding.
- the seat plate body 145 covers the upper surface side of the rear axle case 14, and a vibration isolator 146 having an anti-vibration rubber is bolted thereto.
- the cabin frame 147 (see FIGS. 3, 7, and 8) constituting the framework of the traveling machine body 11 is supported by the seat plate body 145 via the vibration isolator 146.
- the second front restriction pin 35 a that restricts the forward rotation of the rear link member 20 with the rear upper end pivot shaft 28 as a fulcrum reaches the mission case 40 from the link support 18. It is formed in the shape of a horizontally long bar.
- the second front regulating pin 35 a is inserted into a side insertion hole 148 formed on the rear side of the side surface of the mission case 40 in a state of penetrating the first and third bracket bodies 51 and 53.
- a boss cylinder 149 to be fitted to one end side of the second front restriction pin 35a is inserted and fixed in the side insertion hole 148 of the mission case 40.
- the flange portion 150 welded and fixed to the outer peripheral side of the boss cylinder 149 is brought into contact with the rear side of the side surface of the transmission case 40, and the flange portion 150 is fastened to the transmission case 40 with a bolt 151.
- One end side of the second front regulating pin 35 a is inserted into the boss cylinder 149 fixed to the mission case 40.
- a longitudinal midway portion of the second front restriction pin 35 a passes through a support cylinder 152 that is welded and fixed to the first bracket body 51.
- a U-shaped engagement bracket 153 is fixed to the outer surface side of the third bracket body 53 by welding.
- the other end side of the second front restricting pin 35a penetrates the third bracket body 53 and the vertical plate portion of the engaging bracket 153 sideways.
- a vertical retaining pin 154 is inserted and fixed to a portion of the second front restriction pin 35 a on the other end side that has penetrated the vertical plate portion of the engagement bracket 153 and an upper and lower horizontal plate portion of the engagement bracket 153.
- the second front restricting pin 35a is supported in the first and third bracket bodies 51 and 53 and the side insertion hole 148 of the transmission case 40 so as to be removable, and cannot be rotated and cannot be removed by the retaining pin 154. Retained.
- the spacer cylinder 155 is fitted between the boss cylinder 149 and the support cylinder 152 in the second front regulating pin 35a.
- the base end side of the lower link 3 is pivotally supported between the boss cylinder 149 and the spacer cylinder 155 in the second front restriction pin 35a.
- an anti-sway bracket body 156 is pivotally supported between the spacer cylinder 155 and the support cylinder 152 in the second front regulating pin 35a.
- the steady rest bracket body 156 and the lower link are connected via a left and right turnbuckle check chain body 45 as a stabilizer for preventing the rotary tiller 1 (left and right lower link 3) from swinging left and right more than necessary. It is connected.
- One end side of the check chain body 45 is connected to the middle part of the lower link 3 with a pin 157, and the other end side of the check chain body 45 is detachably connected to the steady bracket body 156.
- the link with the lift rod 7 is released, and the lower front link pin 35 a is pulled out after removing the retaining pin 154 and then the lower link. 3 can be removed together with the check chain body 45.
- the second front regulating pin 35a that regulates the forward rotation of the rear link member 20 with the rear upper end pivot shaft 28 as a fulcrum is shared by the lower link 3 mounting member, the lower link 3 is mounted and supported. The structure is simplified, and the detachability of the lower link 3 and various working machines is improved, and the number of parts can be reduced, thereby contributing to cost reduction. That is, the second front restriction pin 35a corresponds to a lower link mounting pin.
- the traveling machine body 11 on which the engine 8 is mounted, the track frame 17 provided at the lower part of the traveling machine body 11, and the track frame 17 is mounted via the driving wheel body 16 and the driven wheel bodies 21 and 23.
- a pair of steel plate bodies 123 with the wide surfaces facing each other are detachably fastened to the track frame 17 by fastening members 127, 129, 131, and 133. Because of the structure, the weight can be greatly reduced compared to a conventional track frame made of square pipe material. Further, the assembly workability of the traveling crawler 25 can be improved.
- the track frame 17 is composed of a pair of steel plate bodies 123 in which the wide surfaces face each other, mud is difficult to escape to the left and right of the traveling crawler 25 during traveling, and an effect of preventing skidding can be exhibited.
- the rolling wheel support 124 since the attaching portion 126 of the rolling wheel support 124 that rotatably supports the rolling wheel 26 for grounding the traveling crawler 25 is sandwiched between the pair of steel plate bodies 123, the rolling wheel support The mounting portion 126 of 124 can be used as a strength member of the track frame 17, and the rigidity of the track frame 17 can be increased. The workability of assembling the rolling wheel 26 to the track frame 17 is also good.
- the crawler guide body 41 for preventing the traveling crawler 25 from coming off and holding the metal core body is sandwiched between the pair of steel plate bodies 123, similarly to the mounting portion 126 of the rolling wheel support body 124, The crawler guide body 41 can be used as a strength member of the track frame 17, and can contribute to improving the rigidity of the track frame 17.
- the driven wheel bodies 21 and 23 have a pair of front and rear, and the base end portion (front pedestal bracket 130) of the stretchable tension adjusting mechanism 22 that supports the front driven wheel body 21 is formed by the pair of steel plate bodies 123.
- the base end portion (front pedestal bracket 130) of the tension adjusting mechanism 22 is used as the track frame in the same manner as the attachment portion 126 of the rolling wheel support 124 and the crawler guide body 41. It can be used for 17 strength members, and contributes to improving the rigidity of the track frame 17.
- the base end portion (rear base bracket 132) of the shaft support member (bifurcated rear arm 122) that pivotally supports the rear driven wheel body 23 is sandwiched by the pair of steel plate bodies 123, in this case Similarly to the mounting portion 126 of the rolling wheel support 124, the crawler guide body 41, and the base end portion (front pedestal bracket 130) of the tension adjusting mechanism 22, the shaft support member (bifurcated rear arm 122).
- the base end portion (rear pedestal bracket 132) can be used as a strength member of the track frame 17 and can contribute to improving the rigidity of the track frame 17.
- the traveling machine body 11 on which the engine 8 is mounted the track frame 17 provided in the lower part of the traveling machine body 11, and the track frame 17 is mounted via the driving wheel body 16 and the driven wheel bodies 21 and 23.
- a link support 18 is attached to a rear axle case 14 that transmits rotational power to the drive wheel body 16, and the track frame 17 is composed of a pair of front and rear links.
- the driven wheel bodies 21 and 23 While being connected to the link support 18 via the members 19 and 20 so as to be able to swing back and forth, the driven wheel bodies 21 and 23 have a pair of front and rear, and a rotation support shaft (rear side) of the rear driven wheel body 23.
- the rotation pivot shaft (rear lower pivot shaft 31) of the rear driven wheel body 23 is connected to the rear rear shaft.
- the rotating support shaft protrudes from the rear driven wheel body 23 to the left and right center side, and the lower end side of the rear link member 20 is pivotally supported by the projecting portion. Since the rear driven wheel body 23 is supported in a cantilever shape, the connection support structure between the rear driven wheel body 23 and the rear link member 20 is simplified, and the assembly workability is improved. It is effective.
- the bearing member (the pivot bearing cylinder 134) with respect to the lower fulcrum of the front link member 19 is sandwiched between the pair of steel plate bodies 123, the bearing member (the pivot bearing cylinder 134) is This can be used as a strength member of the track frame 17, and this point can also contribute to the improvement of the rigidity of the track frame 17.
- the traveling machine body 11 on which the engine 8 is mounted, the track frame 17 provided in the lower part of the traveling machine body 11, and the track frame 17 is mounted via the driving wheel body 16 and the driven wheel bodies 21 and 23.
- a link support 18 is attached to a rear axle case 14 that transmits rotational power to the drive wheel body 16, and the track frame 17 is composed of a pair of front and rear links. It is connected to the link support 18 via the members 19 and 20 so as to be able to swing back and forth, and the link support 18 is attached to the left and right outermost portions of the rear axle case 14, so that the traveling crawler 25, the allowance for the front and rear link members 19 and 20 to project to the left and right center side can be reduced.
- the traveling crawler 25 By preventing the mud from adhering to the front and rear link members 19 and 20, it is possible to reduce problems such as the mud interfering with members around the front and rear link members 19 and 20 that swing back and forth.
- the front and rear link members 19 and 20 in the embodiment have more than half of the shape as viewed from the traveling direction of the traveling machine body 11 within the lateral width of the traveling crawler 25.
- the front and rear link members 19 and 20 can be supported by being sufficiently separated from the reeds and tall crops, and the front and rear link members 19 and 20 can break the reeds or defeat tall crops. It is easy to avoid the fear.
- a lower link mounting pin (second front restriction pin 35a) that pivotally supports a proximal end side of the lower link 3 provided at the rear portion of the traveling machine body 11 is extended outward in the left-right direction, and the lower link mounting pin (second Since one end side of the front regulating pin 35a) is removably supported by the transmission case 40 and the other end side is removably supported by the link support 18, the mounting support structure of the lower link 3 can be simplified.
- the lower link 3 and the workability of attaching and detaching various working machines are improved, and the number of parts can be reduced, thereby contributing to cost reduction.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Agricultural Machines (AREA)
Abstract
Description
11 走行機体
12 前車輪
14 後車軸ケース
15 後車軸
17 トラックフレーム
19 前リンク部材
20 後リンク部材
22 テンション調節機構
25 走行クローラ
26 転動輪
27 前上端枢着軸
28 後上端枢着軸(上の枢着軸)
30 前下端枢着軸(下の枢着軸)
31 後下端枢着軸(下の枢着軸)
41 クローラガイド体
122 二股状後アーム(軸支部材)
123 鋼板体
124 転動輪支持体
126 取付け部
127,129,131,133 ボルト(締結部材)
130 前台座ブラケット
132 後台座ブラケット
Claims (10)
- エンジンを搭載した走行機体と、前記走行機体の下部に設けたトラックフレームと、前記トラックフレームに駆動輪体及び従動輪体を介して装着された走行クローラとを備えている作業車両において、
前記トラックフレームは、広幅面同士を対峙させた一対の鋼板体を締結部材にて着脱可能に締結した構造になっている、
作業車両。 - 前記走行クローラ接地用の転動輪を回転可能に軸支する転動輪支持体の取付け部が前記一対の鋼板体にて挟持されている、
請求項1に記載した作業車両。 - 前記走行クローラの外れ防止及び芯金体押さえ用のクローラガイド体が前記一対の鋼板体にて挟持されている、
請求項2に記載した作業車両。 - 前記従動輪体は前後に一対あり、前記前従動輪体を支持する伸縮可能なテンション調節機構の基端部が前記一対の鋼板体にて挟持されている、
請求項2に記載した作業車両。 - 前記後従動輪体を軸支する軸支部材の基端部が前記一対の鋼板体にて挟持されている、請求項4に記載した作業車両。
- 前記駆動輪体に回転動力を伝達する後車軸ケースに、リンク支持体が取り付けられており、前記トラックフレームは、前後一対のリンク部材を介して、前記リンク支持体に前後揺動可能に連結されている一方、
前記従動輪体は前後に一対あり、前記後従動輪体の回転支軸に前記後リンク部材の下端側が回動可能に軸支されている、
請求項1に記載した作業車両。 - 前記回転支軸は前記後従動輪体から左右中央側に突出しており、当該突出部に前記後リンク部材の下端側を回動可能に軸支して、前記後従動輪体を片持ち梁状に支持している、
請求項6に記載した作業車両。 - 前記リンク支持体は前記後車軸ケースの左右最外側部に取り付けられている、
請求項6に記載した作業車両。 - 前記前後のリンク部材は、前記走行機体の進行方向から見てその形態の半分以上が前記走行クローラの左右幅内に収められている、
請求項8に記載した作業車両。 - 前記走行機体の後部に設けられるロワーリンクの基端側を軸支するロワーリンク取付けピンを左右外向きに延長させ、前記ロワーリンク取付けピンの一端側をミッションケースに着脱可能に支持させ、他端側を前記リンク支持体に着脱可能に支持させている、
請求項8又は9に記載した作業車両。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201280031309.6A CN103619697B (zh) | 2011-06-30 | 2012-02-07 | 作业车辆 |
US14/122,090 US8851209B2 (en) | 2011-06-30 | 2012-02-07 | Working vehicle |
KR1020137032264A KR101922270B1 (ko) | 2011-06-30 | 2012-02-07 | 작업차량 |
ES12804214.0T ES2653941T3 (es) | 2011-06-30 | 2012-02-07 | Vehículo de labranza |
EP12804214.0A EP2727802B1 (en) | 2011-06-30 | 2012-02-07 | Working vehicle |
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
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JP2011-146068 | 2011-06-30 | ||
JP2011146069A JP5763988B2 (ja) | 2011-06-30 | 2011-06-30 | 作業車両 |
JP2011-146070 | 2011-06-30 | ||
JP2011146070A JP5763989B2 (ja) | 2011-06-30 | 2011-06-30 | 作業車両 |
JP2011146068A JP5815307B2 (ja) | 2011-06-30 | 2011-06-30 | 作業車両 |
JP2011-146069 | 2011-06-30 |
Publications (1)
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WO2013001845A1 true WO2013001845A1 (ja) | 2013-01-03 |
Family
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PCT/JP2012/052757 WO2013001845A1 (ja) | 2011-06-30 | 2012-02-07 | 作業車両 |
Country Status (7)
Country | Link |
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US (1) | US8851209B2 (ja) |
EP (1) | EP2727802B1 (ja) |
KR (1) | KR101922270B1 (ja) |
CN (1) | CN103619697B (ja) |
ES (1) | ES2653941T3 (ja) |
PT (1) | PT2727802T (ja) |
WO (1) | WO2013001845A1 (ja) |
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US9567729B2 (en) | 2014-09-30 | 2017-02-14 | Kubota Corporation | Working machine |
US9809264B1 (en) * | 2015-07-20 | 2017-11-07 | The United States Of America, As Represented By The Secretary Of The Navy | Track kit for two wheeled balancing ground vehicle |
JP6252580B2 (ja) * | 2015-12-16 | 2017-12-27 | 井関農機株式会社 | 移植機 |
US10099733B1 (en) * | 2016-02-05 | 2018-10-16 | The Charles Machine Works, Inc. | Endless track and guide member |
KR102255434B1 (ko) | 2017-04-24 | 2021-05-24 | 엘에스엠트론 주식회사 | 농업용 작업 차량 |
KR102317204B1 (ko) | 2017-04-24 | 2021-10-25 | 엘에스엠트론 주식회사 | 트랙터용 상부 링크 |
DE102017222757A1 (de) * | 2017-12-14 | 2019-06-19 | Bayerische Motoren Werke Aktiengesellschaft | Radträger eines Fahrzeugs mit einer Aufnahme für eine Spurstange |
US11235820B2 (en) * | 2018-03-14 | 2022-02-01 | Treker Mobility Llc | Adaptive track assembly |
US10894569B2 (en) | 2018-04-06 | 2021-01-19 | Deere & Company | Track support member and assembly |
US11618515B2 (en) | 2019-04-09 | 2023-04-04 | Cnh Industrial America Llc | Suspension system for a track-driven work vehicle with tandem rear idler/roller |
US11753093B2 (en) | 2019-04-09 | 2023-09-12 | Cnh Industrial America Llc | Suspension system for a track-driven work vehicle with pivoting roller wheel assemblies |
US11724757B2 (en) | 2020-10-29 | 2023-08-15 | Caterpillar Inc. | Roller frame assembly in ground-engaging track system having anti-backbending rollers and method |
US11396213B1 (en) * | 2021-01-07 | 2022-07-26 | Hammer Concepts and Designs, LLC | Bracket assembly for a multi-link suspension system |
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Also Published As
Publication number | Publication date |
---|---|
EP2727802A1 (en) | 2014-05-07 |
ES2653941T3 (es) | 2018-02-09 |
KR101922270B1 (ko) | 2019-02-13 |
CN103619697A (zh) | 2014-03-05 |
US20140097029A1 (en) | 2014-04-10 |
EP2727802A4 (en) | 2016-01-13 |
PT2727802T (pt) | 2017-11-15 |
KR20140028061A (ko) | 2014-03-07 |
US8851209B2 (en) | 2014-10-07 |
EP2727802B1 (en) | 2017-10-11 |
CN103619697B (zh) | 2016-11-02 |
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