WO2019008885A1 - Structure de support d'aile et véhicule de travail en étant équipé - Google Patents

Structure de support d'aile et véhicule de travail en étant équipé Download PDF

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Publication number
WO2019008885A1
WO2019008885A1 PCT/JP2018/017035 JP2018017035W WO2019008885A1 WO 2019008885 A1 WO2019008885 A1 WO 2019008885A1 JP 2018017035 W JP2018017035 W JP 2018017035W WO 2019008885 A1 WO2019008885 A1 WO 2019008885A1
Authority
WO
WIPO (PCT)
Prior art keywords
front wheel
fender
support structure
rotating body
fender support
Prior art date
Application number
PCT/JP2018/017035
Other languages
English (en)
Japanese (ja)
Inventor
晃宏 朝田
裕基 井阪
大地 村松
圭介 椎葉
Original Assignee
株式会社クボタ
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 JP2017235037A external-priority patent/JP6736537B2/ja
Application filed by 株式会社クボタ filed Critical 株式会社クボタ
Priority to EP18827473.2A priority Critical patent/EP3650320B1/fr
Priority to CN201880036375.XA priority patent/CN110709313B/zh
Priority to US16/086,057 priority patent/US10988185B2/en
Publication of WO2019008885A1 publication Critical patent/WO2019008885A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B62D25/08—Front or rear portions
    • B62D25/16—Mud-guards or wings; Wheel cover panels
    • B62D25/163—Mounting devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B62D25/08—Front or rear portions
    • B62D25/16—Mud-guards or wings; Wheel cover panels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B62D25/08—Front or rear portions
    • B62D25/16—Mud-guards or wings; Wheel cover panels
    • B62D25/168—Mud guards for utility vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B62D25/08—Front or rear portions
    • B62D25/16—Mud-guards or wings; Wheel cover panels
    • B62D25/18—Parts or details thereof, e.g. mudguard flaps
    • B62D25/182—Movable mudguards, or mudguards comprising movable or detachable parts
    • B62D25/186—Movable mudguards, or mudguards comprising movable or detachable parts being attached or suspended laterally from the wheel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D49/00—Tractors

Definitions

  • the present invention relates to a fender support structure for supporting a fender covering a front wheel, and a technology of a work vehicle provided with the same.
  • Patent Document 1 the technology of a fender support structure for supporting a fender covering a front wheel is known. For example, it is as described in Patent Document 1.
  • Patent Document 1 discloses a technique of fixing a fender covering the front wheel via a stay or the like to an interlocking member interlocked with a steering operation (steering) of the front wheel. According to such a configuration, since the fender also pivots along with the steering of the front wheel, it is possible to prevent the splash of the front wheel even when the front wheel is steered.
  • the present invention has been made in view of the above circumstances, and a problem to be solved is to provide a fender support structure capable of suppressing the interference of fender accompanying the steering to the left and right of the front wheel, and the same It is providing a work vehicle.
  • the fender support structure of the present invention is relatively rotatable with respect to the first pivoting body pivoting with the steering of the front wheel, and the first pivoting body, and supports the fender covering the front wheel Holding force which is accommodated in the pivoting body, the first pivoting body and the second pivoting body, and tries to hold the relative pivoting position of the second pivoting body with respect to the first pivoting body at a predetermined initial position
  • a regulation that restricts the rotation of the second rotating body with the steering of the front wheel against the holding force.
  • a mechanism is relatively rotatable with respect to the first pivoting body pivoting with the steering of the front wheel, and the first pivoting body, and supports the fender covering the front wheel Holding force which is accommodated in the pivoting body, the first pivoting body and the second pivoting body, and tries to hold the relative pivoting position of the second pivoting body with respect to the first pivoting body at a predetermined initial position
  • the fender support structure of the present invention further includes a seal member for sealing between the first rotating body and the second rotating body.
  • the second rotating body is disposed to cover the first rotating body from above and from the side.
  • the holding mechanism includes a main body portion wound in a coil shape having an axis substantially parallel to a rotation axis of the second rotation body, and both end portions formed to protrude in a radial direction from the main body portion And a first fixing portion fixed to the first rotating body and engageable with any one of the two end portions, and fixed to the second rotating body, any one of the other ends and the other And an engageable second fixing portion.
  • the fender support structure of the present invention further includes a protection member which is accommodated in the first rotating body and the second rotating body and covers the torsion spring from the outer side in the radial direction.
  • first fixed portion and the second fixed portion are formed in a rod shape substantially in parallel with the rotation axis of the second rotating body, and the second rotating body is in the initial position when the second rotating body is in the initial position. It engages in both.
  • both end portions are formed to project radially inward from the main body portion.
  • the both end portions are configured such that a gap between each other becomes smaller inward in the radial direction when viewed from the axial direction of the rotating shaft of the second rotating body
  • the first fixing portion and the second fixing portion are disposed in the gap.
  • first fixing portion and the second fixing portion are formed in a cylindrical shape extending substantially in parallel with the rotation axis of the second rotating body, and a diameter of the first fixing portion or the second fixing portion. Those located on the outside in the direction are formed to have a larger diameter than those located on the inside in the radial direction.
  • the restriction mechanism is configured such that a front side of the front wheel is pivoted to the inside of the vehicle body on the basis of a steering angle of the front wheel in a state where the vehicle body goes straight, thereby restricting the second rotating body.
  • the steering angle is formed to be larger than the steering angle of the front wheel when the rear side of the front wheel is turned to the inside of the vehicle body and the second rotating body is restricted.
  • the restriction mechanism is fixed to the second rotating body, and the front side of the front wheel abuts against a part of the vehicle body when the front side of the front wheel is rotated inward of the vehicle body by a predetermined steering angle.
  • the first restricting portion for restricting the rotation and the second rotating body are fixed, and the rear side of the front wheel abuts against the portion when the rear side of the front wheel rotates by a predetermined steering angle to the inside of the vehicle body.
  • a second restricting portion that restricts the turning of the turning body.
  • the restriction mechanism further includes an adjustment mechanism capable of changing the fixed position of the first restriction portion and the second restriction portion with respect to the second rotating body.
  • the part is a joint of a case of a front axle mechanism that transmits power to the front wheel.
  • the first restricting portion is located at a position farther in the left-right direction from the portion than the second restricting portion. is there.
  • the work vehicle of the present invention is provided with the fender support structure of the present invention.
  • the fender is formed such that its front end is located in the front-rear direction identical to the front end of the front wheel, or in front of the front end of the front wheel.
  • the fender is formed to cover a half or more of the outer periphery of the front wheel.
  • the fender support structure of the present invention it is possible to suppress the interference of the fender accompanying the steering of the front wheel to the left and right.
  • interference of the fender can be suppressed not only when the front wheel is steered in one direction but also when steered in the other direction, the degree of freedom of the shape of the fender can be improved.
  • foreign matter can be effectively prevented from adhering to the holding mechanism.
  • the fender support structure of the present invention it is possible to effectively prevent the entry of foreign matter into the inside of the first rotating body and the second rotating body.
  • holding power can be obtained with a simple configuration.
  • the torsion spring can be prevented from interfering with other members.
  • holding power can be obtained with a simple configuration. That is, even if the front wheel is steered to the left or right, the first fixing portion and the second fixing portion can be engaged with either one of the end portions of the torsion spring to obtain a holding force. As described above, regardless of the steering direction of the front wheel, the holding force can be obtained by the two fixing portions (the first fixing portion and the second fixing portion) and the torsion spring.
  • the fender support structure of the present invention high holding power can be easily obtained. That is, by forming the both ends inside the main body, the diameter of the main body wound in a coil can be easily increased. This makes it easy to secure the restoring force (holding force) of the torsion spring.
  • the first fixing portion and the second fixing portion can be easily engaged with both ends of the torsion spring.
  • the holding force for holding the rotational position of the second rotating body at the initial position can be appropriately generated.
  • the fender can follow the front wheel more appropriately. That is, since the width of the front side of the vehicle body (for example, bonnet) is generally smaller than the width of the rear side, when the front side of the front wheel turns to the inside of the vehicle body, the rear side of the front wheel is the inner side of the vehicle body. The fender can be brought closer to the vehicle body as compared with the case of turning to the lower side. For this reason, when the front side of the front wheel turns to the inside of the vehicle body, the fender can follow the front wheel in a wide turning range by restricting the second turning body at a larger steering angle.
  • the width of the front side of the vehicle body for example, bonnet
  • the rear side of the front wheel is the inner side of the vehicle body.
  • the fender can be brought closer to the vehicle body as compared with the case of turning to the lower side. For this reason, when the front side of the front wheel turns to the inside of the vehicle body, the fender can follow the front wheel in a wide turning range by restricting the
  • the rotation of the second rotating body can be restricted with a simple configuration.
  • the steering angle of the front wheel at which the rotation of the second rotating body is restricted can be arbitrarily changed. This makes it possible to set according to the shape of the vehicle body, the work content, and the preference of the worker.
  • the fender support structure of the present invention it becomes easy to check the portion where the first restricting portion and the second restricting portion abut. This facilitates adjustment of the positions of the first restricting portion and the second restricting portion.
  • the fender can follow the front wheel more appropriately.
  • FIG. 3 is a rear perspective view showing a front axle mechanism and a fender support structure.
  • FIG. 3 is a top perspective view showing a front axle mechanism and a fender support structure. Side surface sectional drawing which showed the fender support structure.
  • the top view cross-section schematic diagram which showed the state which the cover member rotated in one direction.
  • the plane cross section schematic diagram which showed the state which the cover member rotated in the other direction.
  • A The plane schematic diagram which showed the control mechanism.
  • B A schematic plan view showing the restriction mechanism when the front wheel is steered in one direction.
  • C A schematic plan view showing the regulating mechanism when the front wheel is steered in the other direction.
  • A A schematic plan view showing the front wheel steered in one direction.
  • B A schematic plan view showing how a front wheel fender is restricted.
  • A A schematic plan view showing the front wheel steered in the other direction.
  • B A schematic plan view showing how a front wheel fender is restricted.
  • A The side view which showed the 1st modification of a front wheel fender.
  • B The side view which showed the 2nd modification of a front wheel fender.
  • A The plane schematic diagram which showed the example which has arrange
  • B A schematic plan view showing the front wheel steered to the left.
  • C A schematic plan view showing the front wheel steered to the right. The plane cross section schematic diagram which showed the modification of the torsion spring.
  • the tractor 1 mainly comprises an airframe frame 2, a front axle mechanism 3, front wheels 4, rear wheels 5, an engine 6, a bonnet 7, a steering wheel 8, a seat 9, a front wheel fender 10, a rear wheel fender 11 and a fender support structure 100. .
  • the airframe 2 is disposed with its longitudinal direction as the front-rear direction.
  • the front portion of the airframe 2 is supported by a pair of left and right front wheels 4 via a front axle mechanism 3.
  • the rear part of the airframe 2 is supported by the left and right rear wheels 5 via a rear axle mechanism (not shown).
  • the front wheel 4 is covered by a front wheel fender 10 generally from above.
  • the rear wheel 5 is covered by a rear wheel fender 11 generally from above.
  • the front wheel fender 10 is formed such that its front end is located slightly forward of the front end of the front wheel 4. As a result, it is possible to effectively prevent mud splash or the like due to the front wheel 4 when the tractor 1 reverses (backs up).
  • the front wheel fender 10 is supported by a fender support structure 100 described later.
  • An engine 6 is provided at the front of the fuselage frame 2.
  • the engine 6 is covered by a bonnet 7.
  • the power of the engine 6 can be transmitted to the front wheels 4 through the front axle mechanism 3 and can be transmitted to the rear wheels 5 through the rear axle mechanism after being shifted by an appropriate transmission.
  • the front wheels 4 and the rear wheels 5 are rotationally driven by the power of the engine 6, and the tractor 1 travels.
  • a driving operation unit having a steering wheel 8, a transmission operation tool (not shown), a seat 9 and the like is provided from the front and rear midway portion to the rear portion of the vehicle body frame 2.
  • the steering wheel 8 can steer the tractor 1 by adjusting (changing) the turning angles of the pair of left and right front wheels 4 in accordance with the amount of rotational operation.
  • FIGS. 2 and 3 mainly show the right side portion of the front axle mechanism 3 (near the front wheel 4 on the right side), the left side of the front axle mechanism 3 is substantially the same (substantially symmetrical ) Is formed.
  • the front axle mechanism 3 transmits the power from the engine 6 to the front wheels 4 and steers the tractor 1 by adjusting the turning angle of the front wheels 4.
  • the front axle mechanism 3 mainly includes a differential case 31, a bevel gear case 32, and a front wheel case 33.
  • the differential case 31 is a box-like member that forms the left and right center portions of the front axle mechanism 3.
  • the differential case 31 is disposed with the longitudinal direction oriented in the left and right direction.
  • the differential case 31 is formed in a hollow shape so as to communicate the left and right ends thereof.
  • a central portion of the differential case 31 is connected to the fuselage frame 2 so as to be swingable.
  • Flange portions 31 a are formed at both left and right end portions of the differential case 31.
  • the bevel gear case 32 is a hollow box-shaped member.
  • a flange portion 32 a is formed at the inner end (the left end in FIGS. 2 and 3) of the bevel gear case 32.
  • the flange portion 32 a of the bevel gear case 32 is fixed to the flange portion 31 a of the differential case 31 using a bolt or the like.
  • the differential case 31 and the bevel gear case 32 are joined to each other at the flange portion 31a and the flange portion 32a.
  • the front wheel case 33 is a box-like member formed in a hollow shape.
  • the front wheel case 33 is rotatably connected to the bevel gear case 32. More specifically, the front wheel case 33 can be pivoted to the left and right with respect to the bevel gear case 32 about a pivot shaft that is directed substantially in the vertical direction.
  • a front axle (not shown) is provided on the side of the front wheel case 33, and the front wheel 4 is fixed via the front axle.
  • a steering cylinder (not shown) is connected to the front wheel case 33.
  • the steering cylinder expands and contracts in accordance with the amount of the turning operation.
  • the front wheel case 33 can rotate with respect to the bevel gear case 32, and thus the front wheel 4 can be steered.
  • the bevel gear case 32, and the front wheel case 33 members (shaft members, gears, etc.) for transmitting power are disposed, and power from the engine 6 is transmitted to the front wheels 4 by the shaft members and the like. It is transmitted.
  • the fender support structure 100 will be more specifically described with reference to FIGS. 2 to 8. Although the fender support structure 100 for supporting the right front wheel fender 10 will be described below, the fender support structure 100 for supporting the left front wheel fender 10 is configured in the same manner (symmetrical to the right fender support structure 100). ing.
  • the fender support structure 100 supports the front wheel fender 10.
  • the fender support structure 100 mainly includes a base member 110, a pivot shaft 120, a cover member 130, a seal member 140, a holding mechanism 150, and a restriction mechanism 160.
  • the base member 110 shown in FIGS. 4 and 5 is a circular plate-like member.
  • the base member 110 is fixed to an upper portion (on an axis of a pivot shaft of the front wheel case 33) of the front wheel case 33 (see FIGS. 2 and 3).
  • the base member 110 rotates integrally with the front wheel case 33.
  • the pivot shaft 120 is a substantially cylindrical member.
  • the pivot shaft 120 is disposed with its axis directed substantially in the vertical direction.
  • the axis of the pivot shaft 120 is arranged to coincide with the axis of the pivot shaft of the front wheel case 33.
  • the upper and lower intermediate portions of the pivot shaft 120 are formed to have a diameter larger than those of the upper and lower end portions.
  • the lower end portion of the pivot shaft 120 is inserted into and fixed to a through hole formed in the central portion of the base member 110.
  • the cover member 130 shown in FIGS. 2 to 5 is a box-like member formed in a hollow shape.
  • the bottom surface of the cover member 130 is open.
  • the inner surface of the cover member 130 is formed to be circular in plan cross section (a circular shape having a diameter slightly larger than the outer diameter of the base member 110).
  • the cover member 130 is disposed to cover the base member 110 from above.
  • the first bush 131 is disposed between the inner surface (inner peripheral surface) of the cover member 130 and the outer peripheral surface of the base member 110.
  • the lower end portion of the cover member 130 is arranged to cover the base member 110 from the side (radially outside). Thereby, the cover member 130 can cover the base member 110 from the side and above.
  • the first bush 131 is formed in a substantially cylindrical shape.
  • the first bush 131 is disposed with its axis directed substantially in the vertical direction.
  • the first bush 131 is disposed along the inner surface (inner peripheral surface) of the cover member 130.
  • the first bush 131 is disposed so as to extend from the vicinity of the upper end to the vicinity of the lower end of the inner surface of the cover member 130.
  • the lower end portion of the first bush 131 is disposed between the inner surface (inner peripheral surface) of the cover member 130 and the outer peripheral surface of the base member 110.
  • a through hole is formed on the top surface of the cover member 130, and the upper end portion of the pivot shaft 120 is inserted through the through hole.
  • the second bush 132 is disposed between the inner circumferential surface of the through hole and the outer circumferential surface of the pivot shaft 120.
  • Thrust collars 133 are respectively provided above and below the second bush 132.
  • a snap ring 134 is provided on the pivot shaft 120 immediately above the upper thrust collar 133.
  • the through hole of the cover member 130 is closed by the lid member 135 from above.
  • a fender bracket 136 is fixed to the outer surface of the cover member 130.
  • the fender bracket 136 is formed to extend substantially upward from the cover member 130.
  • the upper end of the fender bracket 136 is fixed to the front wheel fender 10.
  • the front wheel fender 10 is supported by the cover member 130 via the fender bracket 136.
  • the cover member 130 configured in this manner can rotate relative to the base member 110 about the rotation shaft 120.
  • the sealing member 140 shown in FIG. 4 prevents the entry of foreign matter (water, mud, dust, etc.) into the inside of the cover member 130.
  • the seal member 140 is provided at the lower end portion of the inner peripheral surface of the cover member 130.
  • the seal member 140 can fill the gap between the inner peripheral surface of the cover member 130 and the outer peripheral surface of the base member 110.
  • a recess 137 is formed on the inner surface (inner peripheral surface) of the cover member 130.
  • the concave portion 137 is formed by expanding the diameter of the lower end portion of the inner surface (inner peripheral surface) of the cover member 130 radially outward.
  • the seal member 140 is formed in an annular shape. The seal member 140 is fitted and fixed to the recess 137 of the cover member 130. The seal member 140 is disposed immediately below the first bush 131. The inner circumferential surface of the seal member 140 contacts the base member 110. Thereby, the seal member 140 can seal between the cover member 130 and the base member 1100.
  • the holding mechanism 150 shown in FIG. 4 and FIG. 5 generates a holding force for holding the rotational position of the cover member 130 relative to the base member 110 at a predetermined initial position.
  • the holding mechanism 150 is housed inside the cover member 130.
  • the holding mechanism 150 mainly includes a first fixed shaft 151, a second fixed shaft 152, and a torsion spring 153.
  • the first fixed shaft 151 is a cylindrical member.
  • the first fixed shaft 151 is disposed with its axis directed substantially in the vertical direction.
  • the first fixed shaft 151 is disposed radially adjacent to the pivot shaft 120.
  • the lower end portion of the first fixed shaft 151 is pressed into and fixed to the base member 110.
  • the second fixed shaft 152 is a cylindrical member formed in the same shape as the first fixed shaft 151.
  • the second fixed shaft 152 is disposed with its axis directed substantially in the vertical direction.
  • the second fixed shaft 152 is disposed so as to be radially adjacent to the first fixed shaft 151 (i.e., radially outward of the first fixed shaft 151).
  • the upper end portion of the second fixed shaft 152 is pressed into and fixed to the cover member 130.
  • the first fixed shaft 151 and the second fixed shaft 152 are arranged to extend substantially in parallel with the pivot shaft 120. That is, the first fixed shaft 151 and the second fixed shaft 152 are arranged in parallel to each other. By arranging in this manner, space saving (miniaturization) of the holding mechanism 150 can be facilitated.
  • the torsion spring 153 is a coil spring formed by appropriately bending a wire.
  • the torsion spring 153 mainly includes a main body portion 153a, an upper end portion 153b and a lower end portion 153c.
  • the main body portion 153 a is a portion formed by winding a wire in a coil shape.
  • the outer diameter of the main body portion 153 a is formed to be slightly smaller than the inner diameter of the inner peripheral surface of the cover member 130.
  • the main body portion 153 a is disposed so as to surround the rotation shaft 120 from the outside in a state where the axis line is directed substantially in the vertical direction (substantially parallel to the axis of the rotation shaft 120).
  • the upper end portion 153 b is a portion formed by bending one end (upper end portion) of the strand radially inward. Thus, the upper end portion 153 b is formed to project radially inward from the main body portion 153 a. The upper end portion 153 b is formed to extend from the main body portion 153 a to the vicinity of the pivot shaft 120 in the radial direction.
  • the lower end portion 153 c is a portion formed by bending the other end (lower end portion) of the strand radially inward. Thus, the lower end portion 153c is formed to project radially inward from the main body portion 153a. The lower end portion 153 c is formed to extend from the main body portion 153 a to the vicinity of the pivot shaft 120 in the radial direction.
  • the upper end portion 153b and the lower end portion 153c are formed to extend substantially in parallel in a plan view (see FIG. 5). Further, in the plan view, a constant gap is formed between the upper end portion 153 b and the lower end portion 153 c. The width of the gap is formed to be substantially the same as the outer diameter of the first fixed shaft 151 and the second fixed shaft 152.
  • the torsion spring 153 is disposed such that the first fixed shaft 151 and the second fixed shaft 152 are located in the gap.
  • the rotational position of the cover member 130 with respect to the base member 110 in this state is referred to as the "initial position" of the cover member 130.
  • the first fixed shaft 151 and the second fixed shaft 152 are engaged with the upper end 153 b and the lower end 153 c so as to be sandwiched between the upper end 153 b and the lower end 153 c. There is.
  • the holding mechanism 150 is accommodated inside the cover member 130 (the space surrounded by the base member 110 and the cover member 130). Further, the space in which the holding mechanism 150 is accommodated is sealed by the seal member 140, and the entry of foreign matter from the outside is prevented.
  • the holding mechanism 150 configured as described above generates a holding force to hold the rotational position of the cover member 130 at the initial position (see FIG. 5).
  • the second fixed shaft 152 fixed to the cover member 130 is also centered on the pivot shaft 120. It rotates clockwise in plan view. Then, the second fixed shaft 152 engages with the lower end portion 153c of the torsion spring 153, and the lower end portion 153c also rotates clockwise in plan view.
  • the upper end portion 153b of the torsion spring 153 engages with the first fixed shaft 151 and does not rotate from that position. As a result, since the torsion spring 153 is twisted, a restoring force (holding force) is generated to return the second fixed shaft 152 to the original position (initial position) by the biasing force of the torsion spring 153.
  • the main body portion 153 a of the torsion spring 153 is reduced in diameter by being twisted by the first fixed shaft 151 and the second fixed shaft 152.
  • the main body portion 153a is disposed along the vicinity of the inner peripheral surface of the cover member 130, and a space is secured inside the main body portion 153a. Therefore, even if the diameter of the main body portion 153a is reduced, the main body portion 153a does not interfere with other members and the like.
  • a first bush 131 is provided on the inner peripheral surface of the cover member 130.
  • the first bush 131 can prevent the torsion spring 153 from interfering with the cover member 130. This can prevent the deformation and damage of the cover member 130 and the torsion spring 153.
  • the second fixed shaft 152 fixed to the cover member 130 also centers on the rotation shaft 120. It rotates counterclockwise as viewed from above. Then, the second fixed shaft 152 engages with the upper end portion 153b of the torsion spring 153, and the upper end portion 153b also rotates counterclockwise in plan view.
  • the lower end portion 153 c of the torsion spring 153 engages with the first fixed shaft 151 and does not rotate from that position. As a result, since the torsion spring 153 is twisted, a restoring force (holding force) is generated to return the second fixed shaft 152 to the original position (initial position) by the biasing force of the torsion spring 153.
  • the first fixed shaft 151 and the second fixed shaft 152 respectively correspond to both end portions (upper end portion 153b or lower end portion 153c) of the torsion spring 153.
  • the engagement generates a holding force to hold the cover member 130 in the initial position. Therefore, basically, the base member 110 and the cover member 130 do not rotate relative to each other, and when the base member 110 rotates as the front wheel 4 is steered, the cover member 130 also rotates with the base member 110. It will rotate integrally.
  • the regulating mechanism 160 shown in FIGS. 2, 3 and 8 regulates rotation of the cover member 130 accompanying rotation of the base member 110.
  • the regulating mechanism 160 mainly includes a front stay 161, a front regulating portion 162, a rear stay 163, and a rear regulating portion 164.
  • the front stay 161 is a substantially plate-like member.
  • the front stay 161 is fixed to the front end of the cover member 130.
  • the left end of the front stay 161 is bent forward.
  • a through hole (not shown) for inserting a front restricting portion 162, which will be described later, is formed at the left end portion (a portion bent toward the front) of the front stay 161, and the front side is located at a position corresponding to the through hole.
  • the nut 161a is fixed.
  • the front side regulation portion 162 is a portion that protrudes leftward from the front side stay 161.
  • the front restricting portion 162 is fixed to the left end portion (a portion bent toward the front) of the front stay 161.
  • the front side regulation portion 162 is formed by a bolt.
  • the front side regulation portion 162 is fixed to the front side stay 161 by inserting the front side regulation portion 162 (bolt) into the through hole formed in the left end portion of the front side stay 161 and fastening it to the front side nut 161 a. At this time, by changing the amount of tightening of the front side regulation portion 162 into the front side nut 161a, the position (the fixing position with respect to the cover member 130) of the front side regulation portion 162 can be arbitrarily adjusted.
  • the rear stay 163 is a substantially plate-like member.
  • the rear stay 163 is fixed to the rear end of the cover member 130.
  • the left end of the rear stay 163 is bent rearward.
  • a through hole (not shown) for inserting a rear side regulation portion 164 described later is formed in the left end portion (portion bent toward the rear) of the rear side stay 163, and a position corresponding to the through hole
  • the rear nut 163a is fixed to the
  • the rear restricting portion 164 is a portion that protrudes leftward from the rear stay 163.
  • the rear restricting portion 164 is fixed to the left end (a portion bent toward the rear) of the rear stay 163.
  • the rear side restricting portion 164 is formed by a bolt in the same manner as the front side restricting portion 162.
  • the rear restriction portion 164 is fixed to the rear stay 163 by inserting the rear restriction portion 164 (bolt) into the through hole formed at the left end of the rear stay 163 and fastening it to the rear nut 163a. Ru.
  • the position of the rear restriction portion 164 (the fixing position with respect to the cover member 130) can be arbitrarily adjusted.
  • the front stay 161 and the rear stay 163 are formed so as to be substantially symmetrical in the front-rear direction.
  • the distance x1 between the flange portion 32a and the front regulation portion 162 is larger than the distance x2 between the flange portion 32a and the rear regulation portion 164 (that is, the front regulation portion 162 is
  • the front side restricting portion 162 and the rear side restricting portion 164 are respectively disposed so as to be farther away from the flange portion 32 a than the rear side restricting portion 164.
  • the base member 110 When the front wheel 4 is further steered to the left from the state where the front restricting portion 162 abuts on the flange portion 32a, the base member 110 is turned to the left, but the cover member 130 is restricted by the front restricting portion 162 It can not rotate. Therefore, only the base member 110 rotates with the steering of the front wheel 4 without rotating the cover member 130. In this state, when viewed relatively, the cover member 130 pivots clockwise with respect to the base member 110 in plan view (see FIG. 6). Thus, the front restricting portion 162 restricts the rotation of the cover member 130 against the holding force of the holding mechanism 150.
  • the front side restricting portion 162 is in contact with the flange portion 32a, only the front wheel 4 is steered to the left without rotating the front wheel fender 10 (see FIG. 9B).
  • the rotation of the front wheel fender 10 is restricted at a predetermined steering angle A1, interference of the front wheel fender 10 with the vehicle body (bonnet 7 or the like) of the tractor 1 can be suppressed.
  • the front end of the front wheel fender 10 is formed to be positioned forward of the front end of the front wheel 4, when the front wheel 4 is steered to the left, the front wheel fender 10 is attached to the bonnet 7. It is easy to interfere. Therefore, the fender support structure 100 (a configuration for restricting the rotation of the front wheel fender 10) as in the present embodiment is particularly useful.
  • the base member 110 is turned to the right, but the cover member 130 is restricted by the rear side restricting portion 164 Can not be turned. Therefore, only the base member 110 rotates with the steering of the front wheel 4 without rotating the cover member 130. In this state, when viewed relatively, the cover member 130 pivots counterclockwise with respect to the base member 110 in plan view (see FIG. 7). Thus, the front restricting portion 162 restricts the rotation of the cover member 130 against the holding force of the holding mechanism 150.
  • the front side regulation portion 162 is configured to be farther from the flange portion 32a than the rear side regulation portion 164, so that the steering angle A1 (FIG. (B) is larger than the steering angle A2 (see FIG. 8 (c)). That is, when the front wheel 4 is steered to the left, the steering angle A1 at which the rotation of the front wheel fender 10 is restricted is steered, while the rotation of the front wheel fender 10 is restricted when the front wheel 4 is steered to the right It is set to be larger than the angle A2. Thereby, the rotation of the front wheel fender 10 can be appropriately restricted according to the shape of the vehicle body of the tractor 1 (in particular, the shape of the bonnet 7).
  • the bonnet 7 is formed in a pointed shape (a shape in which the width is narrowed toward the front). For this reason, compared with the case where the front wheel fender 10 is turned to the right, the front wheel fender 10 and the bonnet 7 are less likely to interfere with each other when turning to the left, and a large turning angle can be secured. it can. Therefore, by setting the steering angle A1 to be larger than the steering angle A2, interference between the front wheel fender 10 and the bonnet 7 is prevented, and the front wheel fender 10 is made to follow the front wheel 4 as much as possible. The cat can be effectively prevented.
  • the fender support structure 100 for supporting the front wheel fender 10 on the left side is configured in the same manner (symmetrical to the fender support structure 100 for the right side). can do.
  • the fender support structure 100 is: A base member 110 (first rotating body) that rotates with the steering of the front wheel 4; A cover member 130 (second rotating body) that is rotatable relative to the base member 110 and supports the front wheel fender 10 (fender) that covers the front wheel 4; A holding mechanism 150 which is accommodated in the base member 110 and the cover member 130 and generates a holding force to hold the relative rotational position of the cover member 130 relative to the base member 110 at a predetermined initial position; When the steering angle of the front wheel 4 becomes equal to or greater than a predetermined value on the left and right sides, a regulating mechanism 160 that regulates the rotation of the cover member 130 with the steering of the front wheel 4 against the holding force; The With this configuration, it is possible to suppress the interference of the front wheel fender 10 accompanying the steering of the front wheel 4 to the left and right.
  • the fender support structure 100 It further comprises a sealing member 140 for sealing between the base member 110 and the cover member 130.
  • cover member 130 is The base member 110 is disposed so as to cover the upper side and the side. With this configuration, foreign matter can be prevented from depositing on the upper surface of the base member 110, and intrusion of foreign matter into the holding mechanism 150 and the base member 110 can be effectively prevented.
  • the holding mechanism 150 is A main body portion 153a wound in a coil shape having an axis substantially parallel to the pivot shaft 120 of the cover member 130, and both end portions (upper end portion 153b and an upper end portion 153b) formed to project radially from the main body portion 153a.
  • a torsion spring 153 having a lower end 153c), A first fixed shaft 151 (first fixed portion) fixed to the base member 110 and engageable with any one of the two end portions;
  • a second fixed shaft 152 (second fixed portion) fixed to the cover member 130 and engageable with any one of the other ends;
  • the fender support structure 100 It further comprises a first bush 131 (protective member) housed in the base member 110 and the cover member 130 and covering the torsion spring 153 from the radially outer side.
  • a first bush 131 protective member housed in the base member 110 and the cover member 130 and covering the torsion spring 153 from the radially outer side.
  • the first fixed shaft 151 and the second fixed shaft 152 are:
  • the cover member 130 is formed in a rod shape substantially parallel to the pivot shaft 120, and engages with both the end portions (the upper end portion 153b and the lower end portion 153c) in a state where the cover member 130 is in the initial position. It is a thing. With such a configuration, the holding power can be obtained with a simple configuration. That is, even if the front wheel 4 is steered to the left or right, the first fixed shaft 151 and the second fixed shaft 152 can be engaged with either one of the two end portions of the torsion spring 153 to obtain a holding force. . As described above, regardless of the steering direction of the front wheel 4, the holding force can be obtained by the two fixed portions (the first fixed shaft 151 and the second fixed shaft 152) and the torsion spring 153.
  • both end portions (upper end portion 153 b and lower end portion 153 c) are It is formed to project radially inward from the main body portion 153a. With such a configuration, high holding power can be easily obtained. That is, by forming the both end portions inside the main body portion 153a, the diameter of the main body portion 153a wound in a coil shape can be easily increased. This makes it easy to secure the restoring force (holding force) of the torsion spring.
  • the regulation mechanism 160 The steering angle A1 of the front wheel 4 when the front side of the front wheel 4 is turned to the inside of the vehicle body and the cover member 130 is restricted with reference to the steering angle of the front wheel 4 when the vehicle body goes straight
  • the rear side of the front wheel 4 is formed to be larger than the steering angle A2 of the front wheel 4 when the cover member 130 is restricted by turning to the inside of the vehicle body.
  • the width of the front side of the vehicle body (for example, the bonnet 7) is usually formed narrower than the width of the rear side, when the front side of the front wheel 4 turns to the inside of the vehicle body, the rear side of the front wheel 4
  • the front wheel fender 10 can be brought closer to the vehicle body as compared with the case where the vehicle is turned inward. Therefore, when the front side of the front wheel 4 turns to the inside of the vehicle body, the front wheel fender 10 can be made to follow the front wheel 4 in a wide turning range by regulating the cover member 130 with a larger steering angle. it can.
  • the regulation mechanism 160 A front side regulation that is fixed to the cover member 130 and that abuts against a part of the vehicle body when the front side of the front wheel 4 is turned to the inside of the vehicle body by a predetermined steering angle A1.
  • Part 162 first regulation part
  • Part 162 rear side restriction that is fixed to the cover member 130 and that abuts against the part when the rear side of the front wheel 4 is turned toward the inside of the vehicle by a predetermined steering angle A2 to restrict the rotation of the cover member 130
  • Part 164 second regulatory part
  • the regulation mechanism 160 An adjustment mechanism (a front nut 161a and a rear nut 163a) capable of changing a fixed position of the front side regulation portion 162 and the rear side regulation portion 164 with respect to the cover member 130 is further provided. With this configuration, the steering angle of the front wheel 4 at which the rotation of the cover member 130 is restricted can be arbitrarily changed. This makes it possible to set according to the shape of the vehicle body, the work content, and the preference of the worker.
  • the part is It is a joint portion (flange portion 32 a) of a case (bevel gear case 32) of the front axle mechanism 30 that transmits power to the front wheel 4.
  • a joint portion flange portion 32 a
  • the portion flange portion 32 a
  • the front side regulation portion 162 and the rear side regulation portion 164 abut.
  • the fender support structure 100 In a state where the steering angle of the front wheel 4 is set to the steering angle at which the vehicle body travels straight, The front side regulation portion 162 is located at a position farther in the left-right direction from the flange portion 32 a than the rear side regulation portion 164. With this configuration, the front wheel fender 10 can more appropriately follow the front wheel 4.
  • the tractor 1 (work vehicle) includes the fender support structure 100. With this configuration, it is possible to suppress the interference of the front wheel fender 10 accompanying the steering of the front wheel 4 to the left and right.
  • the front wheel fender 10 is The front end is formed to be positioned forward of the front end of the front wheel 4 in the front-rear direction. By configuring in this manner, it is possible to effectively suppress the splash of the front wheel 4, in particular, the splash at the time of reverse travel.
  • the base member 110 according to the present embodiment is an embodiment of the first rotating body according to the present invention.
  • the front wheel fender 10 according to the present embodiment is an embodiment of the fender according to the present invention.
  • the cover member 130 which concerns on this embodiment is one form of embodiment of the 2nd rotation body which concerns on this invention.
  • the upper end part 153b and the lower end part 153c which concern on this embodiment are one Embodiment of the both-ends part of the torsion spring which concerns on this invention.
  • shaft 151 which concerns on this embodiment is one form of embodiment of the 1st fixing
  • the second fixed shaft 152 according to the present embodiment is an embodiment of the second fixed portion according to the present invention.
  • the front side regulating portion 162 according to the present embodiment is an embodiment of the first regulating portion according to the present invention.
  • the back side control part 164 which concerns on this embodiment is one form of embodiment of the 2nd control part which concerns on this invention.
  • the front side nut 161a and the rear side nut 163a according to the present embodiment are an embodiment of the adjusting mechanism according to the present invention.
  • the flange portion 32a of the bevel gear case 32 according to the present embodiment is an embodiment of the joint portion of the case of the front axle mechanism according to the present invention.
  • the first bush 131 according to the present embodiment is an embodiment of the protective member according to the present invention.
  • the restricting mechanism 160 is not limited to the configuration of the present embodiment, and can restrict the pivoting of the cover member 130 when the steering angle of the front wheel 4 becomes equal to or larger than a predetermined value on the left and right. If it is Moreover, the site
  • the fixing position of the front side regulation part 162 and the rear side regulation part 164 was made changeable using a nut (the front side nut 161a and the rear side nut 163a) in this embodiment, the present invention is not limited to this.
  • the fixed position of the front side regulating portion 162 or the like can be changed by any method.
  • the steering angle A1 is formed to be larger than the steering angle A2.
  • the present invention is not limited to this, and the steering angle A1 and the steering angle A2 are the tractor 1 It is possible to set appropriately according to the shape of the (the shape of the bonnet 7) or the like.
  • the front end of the front wheel fender 10 is formed to be located slightly in front of the front end of the front wheel 4 (see FIG. 1), but the present invention is not limited thereto. .
  • the front end of the front wheel fender 10 can be disposed at the same position Y as the front end of the front wheel 4 in the front-rear direction.
  • mud splashing by the front wheel 4 in particular, mud at the time of reverse travel The splash can be effectively prevented.
  • the front wheel fender 10 can be formed so as to cover half or more of the outer periphery of the front wheel 4. More specifically, in a side view, the front wheel fender 10 is also formed so as to cover from the outside a half or more of the outer periphery of the front wheel 4 (that is, a range of 180 degrees or more around the pivot axis of the front wheel 4). It is possible. By configuring in this manner, a wide range of the outer periphery of the front wheel 4 can be covered, so that the splashing of the front wheel 4 can be effectively suppressed.
  • the pivot axis of the front wheel fender 10 coincides with the axis of the pivot axis of the front wheel 4 (that is, the pivot axis of the front wheel case 33).
  • the present invention is not limited to this.
  • the pivoting shaft (C1 in FIG. 12) of the front wheel fender 10 and the pivoting shaft (C2 in FIG. 12) of the front wheel 4 can be arranged at different positions. It is. Specifically, in the example shown in FIG. 12, the rotation axis C1 of the front wheel fender 10 is set to be located outside (the front wheel 4 side) of the rotation axis C2 of the front wheel 4. With this configuration, as shown in FIGS. 12B and 12C, the front wheel fender 10 is less likely to interfere with the vehicle body (bonnet 7 or the like) of the tractor 1.
  • both end portions (the upper end portion 153 b and the lower end portion 153 c) of the torsion spring 153 are formed so as to extend substantially parallel in plan view in a state where the cover member 130 is at the initial position (see FIG. 5), but the present invention is not limited thereto.
  • the clearances between the two end portions (upper end portion 153 b and lower end portion 153 c) of the torsion spring 153 become smaller toward each other (inward in the radial direction) It may be formed in
  • the first fixed shaft 151 and the second fixed shaft 152 can easily engage with the both end portions (the upper end portion 153 b and the lower end portion 153 c) Become.
  • the gap between the upper end portion 153 b and the lower end portion 153 c in a plan view becomes larger toward the radially outer side. Therefore, in this case, as in the modification shown in FIG. 13, of the first fixed shaft 151 and the second fixed shaft 152, the diameter of the one positioned radially outside (in the present embodiment, the second fixed shaft 152) It is preferable to make it large. That is, when the cover member 130 is in the initial position, the first fixed shaft 151 and the second fixed shaft 152 both contact (engage) with the upper end portion 153 b and the lower end portion 153 c. It is desirable to set the diameters of the shaft 151 and the second fixed shaft 152 appropriately. Thus, the holding force for holding the rotational position of the cover member 130 at the initial position can be appropriately generated.
  • both end portions (upper end portion 153 b and lower end portion 153 c) of the torsion spring 153 are:
  • the cover member 130 is formed so as to approach each other radially inward as viewed from the axial direction of the pivot shaft 120 of the cover member 130.
  • the first fixed shaft 151 and the second fixed shaft 152 are It is arrange
  • the first fixed shaft 151 and the second fixed shaft 152 are:
  • the cover member 130 is formed in a cylindrical shape extending substantially in parallel with the pivot shaft 120, Of the first fixed shaft 151 or the second fixed shaft 152, the second fixed shaft 152 (located radially outward) has a diameter larger than that of the first fixed shaft 151 (located radially inward). It is formed to be large. By this configuration, it is possible to appropriately generate a holding force for holding the rotational position of the cover member 130 at the initial position.
  • both ends of the torsion spring 153 can be arranged at mutually separated positions (for example, a position different by 180 degrees around the pivot shaft 120, etc.).
  • the configuration of the holding mechanism 150 is not limited to the above-described embodiment, as long as the holding force for holding the cover member 130 in the initial position can be generated.
  • various other biasing members can be used instead of the torsion spring 153.
  • tractor 1 was illustrated as a working vehicle, this invention is applicable to the various other working vehicles (agricultural vehicle, a construction vehicle, an industrial vehicle, etc.).
  • the present invention can be applied to a fender support structure for supporting a fender covering a front wheel, and a work vehicle provided with the same.

Abstract

L'invention concerne une structure de support d'aile avec laquelle il est possible de supprimer les interférences produites par une aile lorsque les roues avant sont braquées vers la gauche ou vers la droite. L'invention est équipée : d'un élément de base (110) qui tourne conjointement avec le braquage des roues avant ; d'un élément de couvercle (130) qui peut tourner par rapport à l'élément de base (110) et qui supporte l'aile de roue avant recouvrant une roue avant ; d'un mécanisme de maintien (150) qui est logé à l'intérieur de l'élément de base (110) et de l'élément de couvercle (130), et qui produit une force de maintien pour maintenir la position de rotation de l'élément de couvercle (130) par rapport à l'élément de base (110) dans une position initiale prédéterminée ; et d'un mécanisme de restriction qui, si l'angle de braquage des roues avant vers la droite ou la gauche est supérieur ou égal à une valeur prédéterminée, limite la rotation de l'élément de couvercle (130) contre la force de maintien, ladite rotation se produisant lorsque les roues avant sont braquées.
PCT/JP2018/017035 2017-07-01 2018-04-26 Structure de support d'aile et véhicule de travail en étant équipé WO2019008885A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP18827473.2A EP3650320B1 (fr) 2017-07-01 2018-04-26 Structure de support d'aile et véhicule de travail en étant équipé
CN201880036375.XA CN110709313B (zh) 2017-07-01 2018-04-26 挡泥板支承构造以及具有该挡泥板支承构造的作业车辆
US16/086,057 US10988185B2 (en) 2017-07-01 2018-04-26 Fender support structure and work vehicle including same

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2017130001 2017-07-01
JP2017-130001 2017-07-01
JP2017-235037 2017-12-07
JP2017235037A JP6736537B2 (ja) 2017-07-01 2017-12-07 フェンダ支持構造、及びそれを具備する作業車両

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WO2019008885A1 true WO2019008885A1 (fr) 2019-01-10

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10988185B2 (en) 2017-07-01 2021-04-27 Kubota Corporation Fender support structure and work vehicle including same
IT202000021226A1 (it) * 2020-09-08 2022-03-08 Domar S P A Gruppo parafango, in particolare per veicoli agricoli e/o industriali, e relativo veicolo agricolo e/o industriale
US11318998B2 (en) * 2017-06-14 2022-05-03 Agco International Gmbh Locking mechanism for a rotating mudguard assembly

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US4097085A (en) * 1976-08-10 1978-06-27 Harmon's Northern Mfg., Inc. Tractor
DE3607000A1 (de) * 1986-03-04 1987-09-10 Fendt & Co Xaver Kotfluegel fuer die gelenkten raeder eines fahrzeuges
US5074573A (en) * 1990-03-12 1991-12-24 Dick Michael H Pivotal front wheel fenders for tractors
JP2525483Y2 (ja) 1990-11-29 1997-02-12 株式会社クボタ 車輌の前輪フェンダー取付装置
EP1481880A1 (fr) * 2003-05-28 2004-12-01 Motoseal Components Oy Dispositif de fixation d'un garde-boue
US20130154228A1 (en) * 2011-12-20 2013-06-20 Agco Sa Fender Mounting Assembly for Utility Vehicles
US20150197287A1 (en) * 2014-01-14 2015-07-16 Motoseal Components Oy Fastening support for mudguard and mudguard arrangement
US20160128278A1 (en) * 2014-11-10 2016-05-12 Agco Corporation Retractable row crop tire guard

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4097085A (en) * 1976-08-10 1978-06-27 Harmon's Northern Mfg., Inc. Tractor
DE3607000A1 (de) * 1986-03-04 1987-09-10 Fendt & Co Xaver Kotfluegel fuer die gelenkten raeder eines fahrzeuges
US5074573A (en) * 1990-03-12 1991-12-24 Dick Michael H Pivotal front wheel fenders for tractors
JP2525483Y2 (ja) 1990-11-29 1997-02-12 株式会社クボタ 車輌の前輪フェンダー取付装置
EP1481880A1 (fr) * 2003-05-28 2004-12-01 Motoseal Components Oy Dispositif de fixation d'un garde-boue
US20130154228A1 (en) * 2011-12-20 2013-06-20 Agco Sa Fender Mounting Assembly for Utility Vehicles
US20150197287A1 (en) * 2014-01-14 2015-07-16 Motoseal Components Oy Fastening support for mudguard and mudguard arrangement
US20160128278A1 (en) * 2014-11-10 2016-05-12 Agco Corporation Retractable row crop tire guard

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11318998B2 (en) * 2017-06-14 2022-05-03 Agco International Gmbh Locking mechanism for a rotating mudguard assembly
US10988185B2 (en) 2017-07-01 2021-04-27 Kubota Corporation Fender support structure and work vehicle including same
IT202000021226A1 (it) * 2020-09-08 2022-03-08 Domar S P A Gruppo parafango, in particolare per veicoli agricoli e/o industriali, e relativo veicolo agricolo e/o industriale
EP3964428A1 (fr) * 2020-09-08 2022-03-09 DOMAR S.p.A. Groupe de garde-boue, en particulier pour véhicules agricoles et/ou industriels et véhicule agricole et/ou industriel associé

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