WO2019008885A1 - Fender support structure and work vehicle equipped with same - Google Patents

Fender support structure and work vehicle equipped with same 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
French (fr)
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/en
Application filed by 株式会社クボタ filed Critical 株式会社クボタ
Priority to CN201880036375.XA priority Critical patent/CN110709313B/en
Priority to EP18827473.2A priority patent/EP3650320B1/en
Priority to US16/086,057 priority patent/US10988185B2/en
Publication of WO2019008885A1 publication Critical patent/WO2019008885A1/en

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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

Provided is a fender support structure with which it is possible to suppress interference from a fender occurring when steering the front wheels to the left or right. The invention is equipped with: a base member 110 which rotates in conjunction with steering the front wheels; a cover member 130 which is capable of rotation relative to the base member 110 and supports the front-wheel fender covering a front wheel; a holding mechanism 150 that is housed within the base member 110 and the cover member 130, and that generates a holding force to hold the rotation position of the cover member 130 relative to the base member 110 at a predetermined initial position; and a restricting mechanism which, if the steering angle of the front wheels to the right or left is equal to or greater than a predetermined value, restricts the rotation of the cover member 130 against the holding force, said rotation occurring when the front wheels are steered.

Description

フェンダ支持構造、及びそれを具備する作業車両Fender support structure and work vehicle equipped with the same
　本発明は、前輪を覆うフェンダを支持するフェンダ支持構造、及びそれを具備する作業車両の技術に関する。 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.
　従来、前輪を覆うフェンダを支持するフェンダ支持構造の技術は公知となっている。例えば、特許文献１に記載の如くである。 Conventionally, 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.
　特許文献１に記載の技術では、前輪のステアリング動作（操舵）に連動する連動部材に、ステー等を介して前輪を覆うフェンダを固定する技術が開示されている。このような構成によれば、前輪の操舵に伴ってフェンダも回動するため、前輪を操舵した状態でも当該前輪による泥はねを防止することができる。 The technique described in 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.
　しかしながら、特許文献１に記載の技術のように、前輪の操舵に伴ってフェンダを回動させると、当該フェンダが車体（例えば、ボンネット等）と干渉するおそれがある。 However, as in the technique described in Patent Document 1, when the fender is turned along with the steering of the front wheel, the fender may interfere with the vehicle body (for example, a bonnet or the like).
実登第２５２５４８３号公報True No. 2525483
　本発明は以上の如き状況に鑑みてなされたものであり、その解決しようとする課題は、前輪の左右への操舵に伴うフェンダの干渉を抑制することができるフェンダ支持構造、及びそれを具備する作業車両を提供することである。 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.
　本発明の解決しようとする課題は以上の如くであり、次にこの課題を解決するための手段を説明する。 The problem to be solved by the present invention is as described above, and next, means for solving the problem will be described.
　即ち、本発明のフェンダ支持構造は、前輪の操舵に伴って回動する第一回動体と、前記第一回動体に対して相対回動可能であり、前記前輪を覆うフェンダを支持する第二回動体と、前記第一回動体及び前記第二回動体に収容され、前記第二回動体の前記第一回動体に対する相対的な回動位置を、所定の初期位置に保持しようとする保持力を発生させる保持機構と、前記前輪の操舵角度が左右にそれぞれ所定の値以上となった場合、前記保持力に抗して前記前輪の操舵に伴う前記第二回動体の回動を規制する規制機構と、を具備するものである。 That is, 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 When the steering angle of the front wheel becomes equal to or greater than a predetermined value on the left and right, respectively, a regulation that restricts the rotation of the second rotating body with the steering of the front wheel against the holding force. And a mechanism.
　また、本発明のフェンダ支持構造は、前記第一回動体と前記第二回動体との間をシールするシール部材をさらに具備するものである。 Further, 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.
　また、前記第二回動体は、前記第一回動体を上方及び側方から覆うように配置されるものである。 Further, the second rotating body is disposed to cover the first rotating body from above and from the side.
　また、前記保持機構は、前記第二回動体の回動軸と略平行な軸線を有するコイル状に巻回された本体部、及び前記本体部から径方向に突出するように形成された両端部を有するねじりばねと、前記第一回動体に固定され、前記両端部のいずれか一方と係合可能な第一固定部と、前記第二回動体に固定され、前記両端部のいずれか他方と係合可能な第二固定部と、を具備するものである。 Further, 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.
　また、本発明のフェンダ支持構造は、前記第一回動体及び前記第二回動体に収容され、前記ねじりばねを径方向外側から覆う保護部材をさらに具備するものである。 Further, 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.
　また、前記第一固定部及び前記第二固定部は、前記第二回動体の回動軸と略平行な棒状に形成され、前記第二回動体が前記初期位置にある状態において、前記両端部のどちらにも係合するものである。 Further, the 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.
　また、前記両端部は、前記本体部から径方向内側に向かって突出するように形成されているものである。 Further, the both end portions are formed to project radially inward from the main body portion.
　また、前記両端部は、前記第二回動体が前記初期位置にある状態において、前記第二回動体の回動軸の軸線方向から見て、径方向内側に向かって互いの隙間が小さくなるように形成され、前記第一固定部及び前記第二固定部は、前記隙間に配置されているものである。 Further, in the state in which the second rotating body is in the initial position, 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.
　また、前記第一固定部及び前記第二固定部は、前記第二回動体の回動軸と略平行に延びる円柱状に形成され、前記第一固定部又は前記第二固定部のうち、径方向外側に位置するものは、径方向内側に位置するものよりも径が大きくなるように形成されているものである。 In addition, the 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.
　また、前記規制機構は、車体が直進する状態における前記前輪の操舵角度を基準として、前記前輪の前側が車体の内側へと回動して前記第二回動体が規制される際の前記前輪の操舵角度が、前記前輪の後側が車体の内側へと回動して前記第二回動体が規制される際の前記前輪の操舵角度よりも大きくなるように形成されているものである。 Further, 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.
　また、前記規制機構は、前記第二回動体に固定され、前記前輪の前側が車体の内側へと所定の操舵角度だけ回動した際に車体の一部分と当接することで前記第二回動体の回動を規制する第一規制部と、前記第二回動体に固定され、前記前輪の後側が車体の内側へと所定の操舵角度だけ回動した際に前記一部分と当接することで前記第二回動体の回動を規制する第二規制部と、を具備するものである。 Further, 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. And a second restricting portion that restricts the turning of the turning body.
　また、前記規制機構は、前記第一規制部及び前記第二規制部の前記第二回動体に対する固定位置を変更可能な調節機構をさらに具備するものである。 In addition, 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.
　また、前記一部分は、前記前輪に動力を伝達するフロントアクスル機構のケースの接合部であるものである。 The part is a joint of a case of a front axle mechanism that transmits power to the front wheel.
　また、前記前輪の操舵角度が、車体が直進する操舵角度にされた状態において、前記第一規制部の方が、前記第二規制部よりも前記一部分から左右方向に離れた位置にあるものである。 Further, in a state in which the steering angle of the front wheel is set to a steering angle at which the vehicle body travels straight, 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.
　また、本発明の作業車両は、本発明のフェンダ支持構造を具備するものである。 The work vehicle of the present invention is provided with the fender support structure of the present invention.
　また、前記フェンダは、その前端が、前後方向において前記前輪の前端と同一、又は前記前輪の前端よりも前方に位置するように形成されるものである。 Further, 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.
　また、前記フェンダは、前記前輪の外周を、半分以上覆うように形成されるものである。 Further, the fender is formed to cover a half or more of the outer periphery of the front wheel.
　本発明の効果として、以下に示すような効果を奏する。 The effects of the present invention are as follows.
　本発明のフェンダ支持構造においては、前輪の左右への操舵に伴うフェンダの干渉を抑制することができる。特に、前輪が一方向に操舵された場合のみならず、他方向に操舵された場合にもフェンダの干渉を抑制することができるため、当該フェンダの形状の自由度を向上させることができる。また、保持機構に異物が付着するのを効果的に防止することができる。 In 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. In particular, since 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. In addition, foreign matter can be effectively prevented from adhering to the holding mechanism.
　本発明のフェンダ支持構造においては、保持機構に異物が付着するのを効果的に防止することができる。 In the fender support structure of the present invention, foreign matter can be effectively prevented from adhering to the holding mechanism.
　本発明のフェンダ支持構造においては、第一回動体及び第二回動体の内部への異物の侵入を効果的に防止することができる。 In 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.
　本発明のフェンダ支持構造においては、簡素な構成で保持力を得ることができる。 In the fender support structure of the present invention, holding power can be obtained with a simple configuration.
　本発明のフェンダ支持構造においては、ねじりばねが他の部材と干渉するのを防止することができる。 In the fender support structure of the present invention, the torsion spring can be prevented from interfering with other members.
　本発明のフェンダ支持構造においては、簡素な構成で保持力を得ることができる。すなわち、前輪が左右のどちらに操舵されたとしても、第一固定部及び第二固定部が、ねじりばねの両端部のいずれか一方に係合して保持力を得ることができる。このように、前輪の操舵方向にかかわらず、２つの固定部（第一固定部及び第二固定部）とねじりばねによって保持力を得ることができる。 In the fender support structure of the present invention, 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.
　本発明のフェンダ支持構造においては、高い保持力を得易くすることができる。すなわち、両端部を本体部の内側に形成することで、コイル状に巻回された本体部の径を大きくし易くすることができる。これによって、当該ねじりばねの復元力（保持力）が確保し易くなる。 In 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.
　本発明のフェンダ支持構造においては、第一固定部及び第二固定部とねじりばねの両端部とを係合しやすくすることができる。 In the fender support structure of the present invention, the first fixing portion and the second fixing portion can be easily engaged with both ends of the torsion spring.
　本発明のフェンダ支持構造においては、第二回動体の回動位置を初期位置に保持するための保持力を適切に発生させることができる。 In the fender support structure of the present invention, the holding force for holding the rotational position of the second rotating body at the initial position can be appropriately generated.
　本発明のフェンダ支持構造においては、より適切にフェンダを前輪に追従させることができる。すなわち、通常、車体（例えばボンネット）の前側の幅が後側の幅よりも狭く形成されているため、前輪の前側が車体の内側へと回動する場合には、前輪の後側が車体の内側へと回動する場合に比べて、よりフェンダを車体に近づけることができる。このため、前輪の前側が車体の内側へと回動する際には、より大きい操舵角度で第二回動体を規制することで、広い回動範囲でフェンダを前輪に追従させることができる。 In the fender support structure of the present invention, 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.
　本発明のフェンダ支持構造においては、簡素な構成で第二回動体の回動を規制することができる。 In the fender support structure of the present invention, the rotation of the second rotating body can be restricted with a simple configuration.
　本発明のフェンダ支持構造においては、第二回転体の回動が規制される前輪の操舵角度を任意に変更することができる。これによって、車体の形状や作業内容、作業者の好みに応じた設定が可能となる。 In the fender support structure of the present invention, 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.
　本発明のフェンダ支持構造においては、第一規制部及び第二規制部が当接する部位の確認が容易となる。これによって、第一規制部及び第二規制部の位置の調節が容易となる。 In 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.
　本発明のフェンダ支持構造においては、より適切にフェンダを前輪に追従させることができる。 In the fender support structure of the present invention, the fender can follow the front wheel more appropriately.
　本発明の作業車両においては、前輪の左右への操舵に伴うフェンダの干渉を抑制することができる。 In the work vehicle 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.
　本発明の作業車両においては、前輪の泥はね、特に、後進時の泥はねを効果的に抑制することができる。 In the work vehicle of the present invention, it is possible to effectively suppress mud splashes on the front wheels, in particular, mud splashes during reverse travel.
　本発明の作業車両においては、前輪の泥はねを効果的に抑制することができる。 In the work vehicle of the present invention, mud splashes on the front wheels can be effectively suppressed.
本発明の一実施形態に係るトラクタの全体的な構成を示した側面図。The side view showing the whole composition of the tractor concerning one embodiment of the present invention. フロントアクスル機構及びフェンダ支持構造を示した後方斜視図。FIG. 3 is a rear perspective view showing a front axle mechanism and a fender support structure. フロントアクスル機構及びフェンダ支持構造を示した上方斜視図。FIG. 3 is a top perspective view showing a front axle mechanism and a fender support structure. フェンダ支持構造を示した側面断面図。Side surface sectional drawing which showed the fender support structure. Ａ－Ａ断面模式図。AA cross section schematic diagram. カバー部材が一方向に回動した状態を示した平面断面模式図。The top view cross-section schematic diagram which showed the state which the cover member rotated in one direction. カバー部材が他方向に回動した状態を示した平面断面模式図。The plane cross section schematic diagram which showed the state which the cover member rotated in the other direction. （ａ）規制機構を示した平面模式図。（ｂ）前輪が一方向に操舵された際の規制機構を示した平面模式図。（ｃ）前輪が他方向に操舵された際の規制機構を示した平面模式図。(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）前輪が一方向に操舵された状態を示した平面模式図。（ｂ）前輪フェンダが規制される様子を示した平面模式図。(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）前輪が他方向に操舵された状態を示した平面模式図。（ｂ）前輪フェンダが規制される様子を示した平面模式図。(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）前輪フェンダの第一変形例を示した側面図。（ｂ）前輪フェンダの第二変形例を示した側面図。(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）前輪フェンダと前輪の回動軸を異なる位置に配置した例を示した平面模式図。（ｂ）前輪が左方に操舵された様子を示した平面模式図。（ｃ）前輪が右方に操舵された様子を示した平面模式図。(A) The plane schematic diagram which showed the example which has arrange | positioned the rotational axis of a front wheel fender and a front wheel in a different position. (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. ねじりばねの変形例を示した平面断面模式図。The plane cross section schematic diagram which showed the modification of the torsion spring.
　まず、図１を用いて、一実施形態に係るフェンダ支持構造１００を具備するトラクタ１の概略について説明する。 First, an outline of a tractor 1 provided with a fender support structure 100 according to an embodiment will be described with reference to FIG.
　トラクタ１は、主として機体フレーム２、フロントアクスル機構３、前輪４、後輪５、エンジン６、ボンネット７、ステアリングホイール８、座席９、前輪フェンダ１０、後輪フェンダ１１及びフェンダ支持構造１００を具備する。 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. .
　機体フレーム２は、その長手方向を前後方向として配置される。機体フレーム２の前部はフロントアクスル機構３を介して左右一対の前輪４に支持される。機体フレーム２の後部はリアアクスル機構（不図示）を介して左右一対の後輪５に支持される。前輪４は、概ね上方から前輪フェンダ１０によって覆われる。後輪５は、概ね上方から後輪フェンダ１１によって覆われる。 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.
　前輪フェンダ１０は、その前端が、前輪４の前端よりもやや前方に位置するように形成されている。これによって、トラクタ１が後進（後退）する際の前輪４による泥はね等を効果的に防止することができる。当該前輪フェンダ１０は、後述するフェンダ支持構造１００によって支持されている。 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.
　機体フレーム２の前部にはエンジン６が設けられる。エンジン６はボンネット７に覆われる。エンジン６の動力は、適宜の変速装置で変速された後、フロントアクスル機構３を経て前輪４に伝達可能とされると共に、前記リアアクスル機構を経て後輪５に伝達可能とされる。エンジン６の動力によって前輪４及び後輪５が回転駆動され、トラクタ１の走行が行われる。 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.
　機体フレーム２の前後中途部から後部にかけては、ステアリングホイール８、変速操作具（不図示）、座席９等を有する運転操作部が設けられる。ステアリングホイール８は、その回動操作量に応じて左右一対の前輪４の切れ角を調節（変更）し、トラクタ１を操舵することができる。 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.
　次に、図２及び図３を用いて、フロントアクスル機構３について、より具体的に説明する。なお、図２及び図３には、主にフロントアクスル機構３の右側の部分（右側の前輪４の近傍）を図示しているが、フロントアクスル機構３の左側も略同様に（左右略対称に）形成されている。 Next, the front axle mechanism 3 will be more specifically described with reference to FIGS. 2 and 3. Although 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.
　フロントアクスル機構３は、エンジン６からの動力を前輪４に伝達すると共に、当該前輪４の切れ角を調節することでトラクタ１を操舵するものである。フロントアクスル機構３は、主としてデフケース３１、ベベルギヤケース３２及び前輪ケース３３を具備する。 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.
　デフケース３１は、フロントアクスル機構３の左右中央部を形成する箱状の部材である。デフケース３１は、長手方向を左右方向に向けて配置される。デフケース３１は、その左右両端部を連通するような中空状に形成される。デフケース３１の中央部は、機体フレーム２に対して揺動可能となるように連結される。デフケース３１の左右両端部には、フランジ部３１ａが形成される。 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.
　ベベルギヤケース３２は、中空状に形成された箱状の部材である。ベベルギヤケース３２の内側の端部（図２及び図３では、左端部）には、フランジ部３２ａが形成される。ベベルギヤケース３２のフランジ部３２ａは、デフケース３１のフランジ部３１ａにボルト等を用いて固定される。このように、デフケース３１とベベルギヤケース３２は、フランジ部３１ａ及びフランジ部３２ａにおいて互いに接合されている。 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. Thus, 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.
　前輪ケース３３は、中空状に形成された箱状の部材である。前輪ケース３３は、ベベルギヤケース３２に対して回動可能に連結される。より具体的には、前輪ケース３３は、略上下方向に向けられた回動軸を中心として、ベベルギヤケース３２に対して左右に回動することができる。前輪ケース３３の側部には図示せぬ前車軸が設けられ、当該前車軸を介して前輪４が固定される。 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.
　前輪ケース３３には、図示せぬステアリングシリンダが連結される。ステアリングホイール８が回動操作されると、当該回動操作量に応じてステアリングシリンダが伸縮する。これによって、前輪ケース３３がベベルギヤケース３２に対して回動し、ひいては前輪４を操舵することができる。 A steering cylinder (not shown) is connected to the front wheel case 33. When the steering wheel 8 is turned, the steering cylinder expands and contracts in accordance with the amount of the turning operation. As a result, the front wheel case 33 can rotate with respect to the bevel gear case 32, and thus the front wheel 4 can be steered.
　また、デフケース３１、ベベルギヤケース３２及び前輪ケース３３の内部には、動力を伝達するための部材（軸部材やギヤ等）が配置され、当該軸部材等によってエンジン６からの動力が前輪４へと伝達される。 Further, in the inside of the differential case 31, 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.
　次に、図２から図８までを用いて、フェンダ支持構造１００について、より具体的に説明する。なお、以下では、右側の前輪フェンダ１０を支持するフェンダ支持構造１００について説明するが、左側の前輪フェンダ１０を支持するフェンダ支持構造１００も同様（右側のフェンダ支持構造１００と左右対称）に構成されている。 Next, 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.
　フェンダ支持構造１００は、前輪フェンダ１０を支持するものである。フェンダ支持構造１００は、主としてベース部材１１０、回動軸１２０、カバー部材１３０、シール部材１４０、保持機構１５０及び規制機構１６０を具備する。 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.
　図４及び図５に示すベース部材１１０は、円形板状の部材である。ベース部材１１０は、前輪ケース３３（図２及び図３参照）の上部（前輪ケース３３の回動軸の軸線上）に固定される。これによって、ベース部材１１０は、前輪ケース３３と一体的に回動する。 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). Thus, the base member 110 rotates integrally with the front wheel case 33.
　回動軸１２０は、略円柱状の部材である。回動軸１２０は、軸線を略上下方向に向けた状態で配置される。回動軸１２０の軸線は、前輪ケース３３の回動軸の軸線と一致するように配置されている。回動軸１２０の上下中途部は、上下両端部に比べて径が大きくなるように形成される。回動軸１２０の下端部は、ベース部材１１０の中央部に形成された貫通孔に挿通されて固定される。 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.
　図２から図５までに示すカバー部材１３０は、中空状に形成された箱状の部材である。カバー部材１３０は、底面が開放されている。カバー部材１３０の内面は、平面断面視円形状（ベース部材１１０の外径よりもやや大きい径を有する円形状）となるように形成される。カバー部材１３０は、ベース部材１１０を上方から覆うように配置される。カバー部材１３０の内面（内周面）とベース部材１１０の外周面との間には第一ブッシュ１３１が配置される。 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.
　カバー部材１３０の下端部は、ベース部材１１０を側方（径方向外側）から覆うように配置される。これによって、カバー部材１３０は、ベース部材１１０を側方及び上方から覆うことができる。第一ブッシュ１３１は、略円筒状に形成される。第一ブッシュ１３１は、軸線を略上下方向に向けた状態で配置される。第一ブッシュ１３１は、カバー部材１３０の内面（内周面）に沿うように配置される。第一ブッシュ１３１は、カバー部材１３０の内面の上端部近傍から下端部近傍に亘るように配置される。第一ブッシュ１３１の下端部は、カバー部材１３０の内面（内周面）とベース部材１１０の外周面との間に配置される。 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.
　カバー部材１３０の上面には貫通孔が形成され、当該貫通孔に回動軸１２０の上端部が挿通される。当該貫通孔の内周面と回動軸１２０の外周面との間には第二ブッシュ１３２が配置される。第二ブッシュ１３２の上下には、それぞれスラストカラー１３３が設けられる。また、上側のスラストカラー１３３のすぐ上方において、回動軸１２０に止め輪１３４が設けられる。また、カバー部材１３０の貫通孔は、蓋部材１３５によって上方から閉塞される。 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. Further, a snap ring 134 is provided on the pivot shaft 120 immediately above the upper thrust collar 133. Further, the through hole of the cover member 130 is closed by the lid member 135 from above.
　図２及び図３に示すように、カバー部材１３０の外側面には、フェンダブラケット１３６が固定される。フェンダブラケット１３６は、当該カバー部材１３０から略上方に向かって延びるように形成される。フェンダブラケット１３６の上端部は、前輪フェンダ１０に固定される。このように、フェンダブラケット１３６を介して、前輪フェンダ１０がカバー部材１３０によって支持される。 As shown in FIGS. 2 and 3, 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. Thus, the front wheel fender 10 is supported by the cover member 130 via the fender bracket 136.
　このように構成されたカバー部材１３０は、回動軸１２０を中心としてベース部材１１０に対して相対的に回動することができる。 The cover member 130 configured in this manner can rotate relative to the base member 110 about the rotation shaft 120.
　図４に示すシール部材１４０は、カバー部材１３０の内部への異物（水、泥、埃等）の侵入を防止するものである。シール部材１４０は、カバー部材１３０の内周面の下端部に設けられる。これによって、シール部材１４０は、カバー部材１３０の内周面とベース部材１１０の外周面の間の隙間を埋めることができる。 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. Thus, 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.
　より詳細には、カバー部材１３０の内面（内周面）には、凹部１３７が形成される。凹部１３７は、カバー部材１３０の内面（内周面）の下端部を径方向外側に拡径することにより形成されている。シール部材１４０は、円環状に形成される。シール部材１４０は、カバー部材１３０の凹部１３７に嵌め合わされて固定される。シール部材１４０は、第一ブッシュ１３１のすぐ下方に配置される。シール部材１４０の内周面は、ベース部材１１０と接する。これによって、シール部材１４０は、カバー部材１３０とベース部材１１００の間をシールすることができる。 More specifically, 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.
　図４及び図５に示す保持機構１５０は、カバー部材１３０のベース部材１１０に対する相対的な回動位置を、所定の初期位置に保持しようとする保持力を発生させるものである。保持機構１５０は、カバー部材１３０の内部に収容される。保持機構１５０は、主として第一固定軸１５１、第二固定軸１５２及びねじりばね１５３を具備する。 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.
　第一固定軸１５１は、円柱状の部材である。第一固定軸１５１は、軸線を略上下方向に向けた状態で配置される。第一固定軸１５１は、回動軸１２０に対して径方向に隣接するように配置される。第一固定軸１５１の下端部は、ベース部材１１０に圧入されて固定される。 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.
　第二固定軸１５２は、第一固定軸１５１と同じ形状に形成された円柱状の部材である。第二固定軸１５２は、軸線を略上下方向に向けた状態で配置される。第二固定軸１５２は、第一固定軸１５１に対して径方向に隣接するように（第一固定軸１５１の径方向外側に）配置される。第二固定軸１５２の上端部は、カバー部材１３０に圧入されて固定される。 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.
　第一固定軸１５１及び第二固定軸１５２は、回動軸１２０と略平行に延びるように配置されている。すなわち、第一固定軸１５１と第二固定軸１５２は、互いに平行に配置される。このように配置することにより、保持機構１５０の省スペース化（小型化）が図り易くなる。 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.
　ねじりばね１５３は、素線を適宜屈曲させて形成されるコイルばねである。ねじりばね１５３は、主として本体部１５３ａ、上端部１５３ｂ及び下端部１５３ｃを具備する。 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.
　本体部１５３ａは、素線をコイル状に巻回して形成された部分である。本体部１５３ａの外径は、カバー部材１３０の内周面の内径より若干小さくなるように形成される。本体部１５３ａは、軸線を略上下方向（回動軸１２０の軸線と略平行）に向けた状態で、回動軸１２０を外側から囲むように配置される。 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).
　上端部１５３ｂは、素線の一端（上側の端部）を径方向内側に向けて屈曲させて形成された部分である。これによって、上端部１５３ｂは、本体部１５３ａから径方向内側に向かって突出するように形成される。上端部１５３ｂは、径方向において、本体部１５３ａから回動軸１２０の近傍まで延びるように形成される。 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.
　下端部１５３ｃは、素線の他端（下側の端部）を径方向内側に向けて屈曲させて形成された部分である。これによって、下端部１５３ｃは、本体部１５３ａから径方向内側に向かって突出するように形成される。下端部１５３ｃは、径方向において、本体部１５３ａから回動軸１２０の近傍まで延びるように形成される。 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.
　ここで、ねじりばね１５３に外力が加わらない状態において、上端部１５３ｂと下端部１５３ｃは、平面視（図５参照）において略平行に延びるように形成される。また、平面視において、上端部１５３ｂと下端部１５３ｃの間には、一定の隙間が形成される。当該隙間の幅は、第一固定軸１５１及び第二固定軸１５２の外径と略同一となるように形成される。ねじりばね１５３は、当該隙間に第一固定軸１５１及び第二固定軸１５２が位置するように配置される。この状態におけるカバー部材１３０のベース部材１１０に対する回動位置を、カバー部材１３０の「初期位置」と称する。カバー部材１３０が初期位置にある場合、第一固定軸１５１及び第二固定軸１５２は、上端部１５３ｂと下端部１５３ｃに挟まれるようにして、当該上端部１５３ｂ及び下端部１５３ｃに係合している。 Here, in a state where no external force is applied to the torsion spring 153, 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. When the cover member 130 is in the initial position, 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.
　このように、保持機構１５０は、カバー部材１３０の内部（ベース部材１１０とカバー部材１３０によって囲まれた空間）に収容される。また保持機構１５０が収容される当該空間は、シール部材１４０によって密閉され、外部からの異物の侵入が防止されている。 Thus, 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.
　このように構成された保持機構１５０によって、カバー部材１３０の回動位置を初期位置（図５参照）に保持しようとする保持力が発生する。 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).
　例えば、図６に示すように、カバー部材１３０がベース部材１１０に対して平面視時計回りに回動した場合、当該カバー部材１３０に固定された第二固定軸１５２も回動軸１２０を中心として平面視時計回りに回動する。すると、当該第二固定軸１５２がねじりばね１５３の下端部１５３ｃと係合し、当該下端部１５３ｃも平面視時計回りに回動する。一方、ねじりばね１５３の上端部１５３ｂは第一固定軸１５１と係合し、その位置から回動することはない。これによって、ねじりばね１５３がねじられるため、当該ねじりばね１５３の付勢力によって第二固定軸１５２を元の位置（初期位置）に戻そうとする復元力（保持力）が発生する。 For example, as shown in FIG. 6, when the cover member 130 is pivoted clockwise with respect to the base member 110 in plan view, 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. On the other hand, 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.
　この際、ねじりばね１５３の本体部１５３ａは、第一固定軸１５１及び第二固定軸１５２によってねじられることによって、径が小さくなる。しかし、本体部１５３ａはカバー部材１３０の内周面付近に沿うように配置されており、当該本体部１５３ａの内側にはスペースが確保されている。このため、本体部１５３ａの径が小さくなったとしても、当該本体部１５３ａが他の部材等に干渉することがない。 At this time, 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. However, 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.
　このように、本体部１５３ａをカバー部材１３０の内周面付近に配置することで、当該本体部１５３ａがねじられた際に他の部材と干渉し難くすることができる。これによって、ベース部材１１０に対するカバー部材１３０の相対的な回動量（可動範囲）を大きく確保することができる。 By arranging the main body portion 153 a in the vicinity of the inner peripheral surface of the cover member 130 as described above, when the main body portion 153 a is twisted, interference with other members can be prevented. As a result, it is possible to secure a large amount of relative rotation (movable range) of the cover member 130 with respect to the base member 110.
　さらに、カバー部材１３０の内周面には、第一ブッシュ１３１が設けられている。当該第一ブッシュ１３１によって、ねじりばね１５３がカバー部材１３０と干渉するのを防止することができる。これによって、カバー部材１３０やねじりばね１５３の変形や損傷を防止することができる。 Furthermore, 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.
　また、図７に示すように、カバー部材１３０がベース部材１１０に対して平面視反時計回りに回動した場合、当該カバー部材１３０に固定された第二固定軸１５２も回動軸１２０を中心として平面視反時計回りに回動する。すると、当該第二固定軸１５２がねじりばね１５３の上端部１５３ｂと係合し、当該上端部１５３ｂも平面視反時計回りに回動する。一方、ねじりばね１５３の下端部１５３ｃは第一固定軸１５１と係合し、その位置から回動することはない。これによって、ねじりばね１５３がねじられるため、当該ねじりばね１５３の付勢力によって第二固定軸１５２を元の位置（初期位置）に戻そうとする復元力（保持力）が発生する。 Further, as shown in FIG. 7, when the cover member 130 rotates counterclockwise with respect to the base member 110 in plan view, 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. On the other hand, 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.
　このように、カバー部材１３０がベース部材１１０に対して回動しようとすると、第一固定軸１５１及び第二固定軸１５２が、それぞれねじりばね１５３の両端部（上端部１５３ｂ又は下端部１５３ｃ）と係合することで、当該カバー部材１３０を初期位置に保持しようとする保持力が発生する。このため、基本的には、ベース部材１１０とカバー部材１３０が相対的に回動することはなく、前輪４の操舵に伴ってベース部材１１０が回動すると、カバー部材１３０も当該ベース部材１１０と一体的に回動することになる。 Thus, when the cover member 130 tries to rotate with respect to the base member 110, 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.
　図２、図３及び図８に示す規制機構１６０は、ベース部材１１０の回動に伴うカバー部材１３０の回動を規制するものである。規制機構１６０は、主として前側ステー１６１、前側規制部１６２、後側ステー１６３及び後側規制部１６４を具備する。 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.
　前側ステー１６１は、略板状の部材である。前側ステー１６１は、カバー部材１３０の前端部に固定される。前側ステー１６１の左端部は、前方に向かって屈曲される。当該前側ステー１６１の左端部（前方に向かって屈曲された部分）には、後述する前側規制部１６２を挿通するための貫通孔（不図示）が形成され、当該貫通孔に対応する位置に前側ナット１６１ａが固定される。 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.
　前側規制部１６２は、前側ステー１６１から左方に突出する部分である。前側規制部１６２は、前側ステー１６１の左端部（前方に向かって屈曲された部分）に固定される。前側規制部１６２は、ボルトにより形成される。前側ステー１６１の左端部に形成された貫通孔に前側規制部１６２（ボルト）を挿通し、前側ナット１６１ａに締結することで、当該前側規制部１６２が前側ステー１６１に固定される。この際、前側規制部１６２の前側ナット１６１ａへの締め込み量を変更することで、当該前側規制部１６２の位置（カバー部材１３０に対する固定位置）を任意に調節することができる。 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.
　後側ステー１６３は、略板状の部材である。後側ステー１６３は、カバー部材１３０の後端部に固定される。後側ステー１６３の左端部は、後方に向かって屈曲される。当該後側ステー１６３の左端部（後方に向かって屈曲された部分）には、後述する後側規制部１６４を挿通するための貫通孔（不図示）が形成され、当該貫通孔に対応する位置に後側ナット１６３ａが固定される。 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
　後側規制部１６４は、後側ステー１６３から左方に突出する部分である。後側規制部１６４は、後側ステー１６３の左端部（後方に向かって屈曲された部分）に固定される。後側規制部１６４は、前側規制部１６２と同様に、ボルトにより形成される。後側ステー１６３の左端部に形成された貫通孔に後側規制部１６４（ボルト）を挿通し、後側ナット１６３ａに締結することで、当該後側規制部１６４が後側ステー１６３に固定される。この際、後側規制部１６４の後側ナット１６３ａへの締め込み量を変更することで、当該後側規制部１６４の位置（カバー部材１３０に対する固定位置）を任意に調節することができる。 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. At this time, by changing the amount of tightening of the rear restriction portion 164 into the rear nut 163a, the position of the rear restriction portion 164 (the fixing position with respect to the cover member 130) can be arbitrarily adjusted.
　トラクタ１が直進するように前輪４の操舵角度が調節されている状態において、図８（ａ）に示すように、前側ステー１６１と後側ステー１６３は前後略対称となるように形成されている。またこの状態において、フランジ部３２ａと前側規制部１６２の間の距離ｘ１は、フランジ部３２ａと後側規制部１６４の間の距離ｘ２よりも大きくなるように（すなわち、前側規制部１６２の方が、後側規制部１６４よりもフランジ部３２ａから離れた位置となるように）、前側規制部１６２及び後側規制部１６４がそれぞれ配置されている。 In a state where the steering angle of the front wheel 4 is adjusted such that the tractor 1 travels straight, as shown in FIG. 8A, the front stay 161 and the rear stay 163 are formed so as to be substantially symmetrical in the front-rear direction. . Also, in this state, 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.
　このように構成された規制機構１６０によって、ベース部材１１０の回動に伴うカバー部材１３０の回動が規制される。 The rotation of the cover member 130 accompanying the rotation of the base member 110 is restricted by the restriction mechanism 160 configured in this manner.
　以下では、上述の如く構成されたフェンダ支持構造１００によって、前輪フェンダ１０の回動が規制される様子について説明する。 Hereinafter, the manner in which the rotation of the front wheel fender 10 is restricted by the fender support structure 100 configured as described above will be described.
　図８（ｂ）及び図９（ａ）に示すように、前輪４が左方に（前輪４の前側がトラクタ１の車体内側に向くように）操舵されると、ベース部材１１０と共にカバー部材１３０も左方（平面視反時計回り）に回動される。従って、カバー部材１３０に支持された前輪フェンダ１０も、前輪４の操舵に伴って回動することになる。そして、前輪４の左方への操舵角度が所定の値（操舵角度Ａ１）となった際に、前側規制部１６２がフランジ部３２ａと当接する。これによって、カバー部材１３０の回動が規制される。 As shown in FIGS. 8B and 9A, when the front wheel 4 is steered to the left (so that the front side of the front wheel 4 is directed to the inside of the vehicle body of the tractor 1), the cover member 130 together with the base member 110. Is also turned to the left (counterclockwise in plan view). Accordingly, the front wheel fender 10 supported by the cover member 130 is also rotated as the front wheel 4 is steered. Then, when the leftward steering angle of the front wheel 4 becomes a predetermined value (steering angle A1), the front side regulating portion 162 abuts on the flange portion 32a. The rotation of the cover member 130 is thereby restricted.
　前側規制部１６２がフランジ部３２ａに当接した状態からさらに前輪４が左方に操舵されると、ベース部材１１０は左方に回動するものの、カバー部材１３０は前側規制部１６２によって規制されて回動することができない。このため、カバー部材１３０は回動することなく、ベース部材１１０だけが前輪４の操舵に伴って回動する。この状態では、相対的に見ると、カバー部材１３０は、ベース部材１１０に対して平面視時計回りに回動することになる（図６参照）。このように、前側規制部１６２によって、保持機構１５０の保持力に抗して、カバー部材１３０の回動が規制されることになる。 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.
　このように、前側規制部１６２がフランジ部３２ａに当接した状態では、前輪フェンダ１０は回動することなく、前輪４だけが左方へと操舵される（図９（ｂ）参照）。このように、所定の操舵角度Ａ１において、前輪フェンダ１０の回動が規制されるため、当該前輪フェンダ１０がトラクタ１の車体（ボンネット７等）に干渉するのを抑制することができる。特に、本実施形態では、前輪フェンダ１０の前端が、前輪４の前端よりも前方に位置するように形成されているため、前輪４を左方に操舵した際に当該前輪フェンダ１０がボンネット７に干渉し易い。このため、本実施形態のようなフェンダ支持構造１００（前輪フェンダ１０の回動を規制する構成）が特に有用である。 As described above, in a state where 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). As described above, since 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. In particular, in the present embodiment, since 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.
　また、図８（ｃ）及び図１０（ａ）に示すように、前輪４が右方に（前輪４の前側がトラクタ１の車体外側に向くように）操舵されると、ベース部材１１０と共にカバー部材１３０も右方（平面視時計回り）に回動される。従って、カバー部材１３０に支持された前輪フェンダ１０も、前輪４の操舵に伴って回動することになる。そして、前輪４の右方への操舵角度が所定の値（操舵角度Ａ２）となった際に、後側規制部１６４がフランジ部３２ａと当接する。これによって、カバー部材１３０の回動が規制される。 Also, as shown in FIGS. 8C and 10A, when the front wheel 4 is steered to the right (with the front side of the front wheel 4 facing the outside of the vehicle body of the tractor 1), the cover together with the base member 110 The member 130 is also rotated rightward (clockwise in plan view). Accordingly, the front wheel fender 10 supported by the cover member 130 is also rotated as the front wheel 4 is steered. Then, when the steering angle to the right of the front wheel 4 becomes a predetermined value (steering angle A2), the rear side regulating portion 164 abuts on the flange portion 32a. The rotation of the cover member 130 is thereby restricted.
　後側規制部１６４がフランジ部３２ａに当接した状態からさらに前輪４が右方に操舵されると、ベース部材１１０は右方に回動するものの、カバー部材１３０は後側規制部１６４によって規制されて回動することができない。このため、カバー部材１３０は回動することなく、ベース部材１１０だけが前輪４の操舵に伴って回動する。この状態では、相対的に見ると、カバー部材１３０は、ベース部材１１０に対して平面視反時計回りに回動することになる（図７参照）。このように、前側規制部１６２によって、保持機構１５０の保持力に抗して、カバー部材１３０の回動が規制されることになる。 If the front wheel 4 is further steered to the right from the state where the rear side restricting portion 164 abuts on the flange portion 32 a, 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.
　このように、後側規制部１６４がフランジ部３２ａに当接した状態では、前輪フェンダ１０は回動することなく、前輪４だけが右方へと操舵される（図１０（ｂ）参照）。このように、所定の操舵角度Ａ２において、前輪フェンダ１０の回動が規制されるため、当該前輪フェンダ１０がトラクタ１の車体（ボンネット７等）に干渉するのを抑制することができる。 Thus, in a state where the rear side restricting portion 164 abuts on the flange portion 32a, only the front wheel 4 is steered to the right without rotating the front wheel fender 10 (see FIG. 10 (b)). As described above, since the rotation of the front wheel fender 10 is restricted at the predetermined steering angle A2, interference of the front wheel fender 10 with the vehicle body (bonnet 7 or the like) of the tractor 1 can be suppressed.
　また、図８（ａ）に示すように、前側規制部１６２の方が、後側規制部１６４よりもフランジ部３２ａから離れた位置となるように構成されているため、操舵角度Ａ１（図８（ｂ）参照）は操舵角度Ａ２（図８（ｃ）参照）よりも大きくなる。すなわち、前輪４が左方に操舵された場合に前輪フェンダ１０の回動が規制される操舵角度Ａ１が、前輪４が右方に操舵された場合に前輪フェンダ１０の回動が規制される操舵角度Ａ２よりも大きくなるように設定されている。これによって、トラクタ１の車体の形状（特に、ボンネット７の形状）に応じた適切な前輪フェンダ１０の回動の規制を行うことができる。 Further, as shown in FIG. 8A, 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).
　すなわち、一般的にボンネット７は先鋭状（前方に向かって左右幅が狭くなる形状）に形成されている。このため、前輪フェンダ１０を右方に回動する場合に比べて、左方に回動させる場合の方が、当該前輪フェンダ１０とボンネット７が干渉し難く、回動角度を大きく確保することができる。従って、操舵角度Ａ１が操舵角度Ａ２よりも大きくなるように設定することで、前輪フェンダ１０とボンネット７の干渉を防止しつつ、前輪フェンダ１０を極力前輪４に追従させ、当該前輪４による泥はね等を効果的に防止することができる。 That is, in general, 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.
　なお、左側の前輪フェンダ１０を支持するフェンダ支持構造１００についても同様（右側のフェンダ支持構造１００と左右対称）に構成されているため、同様に、前輪４による泥はね等を効果的に防止することができる。 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.
　以上の如く、本実施形態に係るフェンダ支持構造１００は、
　前輪４の操舵に伴って回動するベース部材１１０（第一回動体）と、
　前記ベース部材１１０に対して相対回動可能であり、前記前輪４を覆う前輪フェンダ１０（フェンダ）を支持するカバー部材１３０（第二回動体）と、
　前記ベース部材１１０及び前記カバー部材１３０に収容され、前記カバー部材１３０の前記ベース部材１１０に対する相対的な回動位置を、所定の初期位置に保持しようとする保持力を発生させる保持機構１５０と、
　前記前輪４の操舵角度が左右にそれぞれ所定の値以上となった場合、前記保持力に抗して前記前輪４の操舵に伴う前記カバー部材１３０の回動を規制する規制機構１６０と、
　を具備するものである。
　このように構成することにより、前輪４の左右への操舵に伴う前輪フェンダ１０の干渉を抑制することができる。特に、前輪４が一方向に操舵された場合のみならず、他方向に操舵された場合にも前輪フェンダ１０の干渉を抑制することができるため、当該前輪フェンダ１０の形状の自由度を向上させることができる。
　また、保持機構１５０をベース部材１１０及びカバー部材１３０に収容することで、当該保持機構１５０に異物（水、泥、埃等）が付着するのを防止することができ、ひいては不具合の発生を防止することができる。 As described above, the fender support structure 100 according to the present embodiment 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. In particular, since interference of the front wheel fender 10 can be suppressed not only when the front wheel 4 is steered in one direction but also when steered in the other direction, the freedom of the shape of the front wheel fender 10 is improved. be able to.
In addition, by accommodating the holding mechanism 150 in the base member 110 and the cover member 130, it is possible to prevent foreign matter (water, mud, dust, etc.) from adhering to the holding mechanism 150, which in turn prevents the occurrence of problems. can do.
　また、フェンダ支持構造１００は、
　前記ベース部材１１０と前記カバー部材１３０との間をシールするシール部材１４０をさらに具備するものである。
　このように構成することにより、保持機構１５０及びベース部材１１０の内部への異物の侵入を防止することができ、保持機構１５０に異物が付着するのを効果的に防止することができる。 Also, the fender support structure 100
It further comprises a sealing member 140 for sealing between the base member 110 and the cover member 130.
By this configuration, it is possible to prevent the entry of foreign matter into the inside of the holding mechanism 150 and the base member 110, and effectively prevent the foreign matter from adhering to the holding mechanism 150.
　また、前記カバー部材１３０は、
　前記ベース部材１１０を上方及び側方から覆うように配置されるものである。
　このように構成することにより、ベース部材１１０の上面に異物が堆積するのを防止することができ、保持機構１５０及びベース部材１１０の内部への異物の侵入を効果的に防止することができる。 Further, the 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.
　また、前記保持機構１５０は、
　前記カバー部材１３０の回動軸１２０と略平行な軸線を有するコイル状に巻回された本体部１５３ａ、及び前記本体部１５３ａから径方向に突出するように形成された両端部（上端部１５３ｂ及び下端部１５３ｃ）を有するねじりばね１５３と、
　前記ベース部材１１０に固定され、前記両端部のいずれか一方と係合可能な第一固定軸１５１（第一固定部）と、
　前記カバー部材１３０に固定され、前記両端部のいずれか他方と係合可能な第二固定軸１５２（第二固定部）と、
　を具備するものである。
　このように構成することにより、簡素な構成で保持力を得ることができる。 Further, 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
With such a configuration, the holding power can be obtained with a simple configuration.
　また、フェンダ支持構造１００は、
　前記ベース部材１１０及び前記カバー部材１３０に収容され、前記ねじりばね１５３を径方向外側から覆う第一ブッシュ１３１（保護部材）をさらに具備するものである。
　このように構成することにより、ねじりばね１５３が他の部材（カバー部材１３０等）と干渉するのを防止することができ、ひいては当該ねじりばね１５３やカバー部材１３０等の変形や損傷を防止することができる。 Also, 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.
With this configuration, interference with the torsion spring 153 with other members (the cover member 130 and the like) can be prevented, and thus deformation and damage of the torsion spring 153 and the cover member 130 and the like can be prevented. Can.
　また、前記第一固定軸１５１及び前記第二固定軸１５２は、
　前記カバー部材１３０の回動軸１２０と略平行な棒状に形成され、前記カバー部材１３０が前記初期位置にある状態において、前記両端部（上端部１５３ｂ及び下端部１５３ｃ）のどちらにも係合するものである。
　このように構成することにより、簡素な構成で保持力を得ることができる。すなわち、前輪４が左右のどちらに操舵されたとしても、第一固定軸１５１及び第二固定軸１５２が、ねじりばね１５３の両端部のいずれか一方に係合して保持力を得ることができる。このように、前輪４の操舵方向にかかわらず、２つの固定部（第一固定軸１５１及び第二固定軸１５２）とねじりばね１５３によって保持力を得ることができる。 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.
　また、前記両端部（上端部１５３ｂ及び下端部１５３ｃ）は、
　前記本体部１５３ａから径方向内側に向かって突出するように形成されているものである。
　このように構成することにより、高い保持力を得易くすることができる。すなわち、両端部を本体部１５３ａの内側に形成することで、コイル状に巻回された本体部１５３ａの径を大きくし易くすることができる。これによって、当該ねじりばねの復元力（保持力）が確保し易くなる。 Further, the 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.
　また、前記規制機構１６０は、
　車体が直進する状態における前記前輪４の操舵角度を基準として、前記前輪４の前側が車体の内側へと回動して前記カバー部材１３０が規制される際の前記前輪４の操舵角度Ａ１が、前記前輪４の後側が車体の内側へと回動して前記カバー部材１３０が規制される際の前記前輪４の操舵角度Ａ２よりも大きくなるように形成されているものである。
　このように構成することにより、より適切に前輪フェンダ１０を前輪４に追従させることができる。すなわち、通常、車体（例えばボンネット７）の前側の幅が後側の幅よりも狭く形成されているため、前輪４の前側が車体の内側へと回動する場合には、前輪４の後側が車体の内側へと回動する場合に比べて、より前輪フェンダ１０を車体に近づけることができる。このため、前輪４の前側が車体の内側へと回動する際には、より大きい操舵角度でカバー部材１３０を規制することで、広い回動範囲で前輪フェンダ１０を前輪４に追従させることができる。 Also, 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.
With this configuration, the front wheel fender 10 can more appropriately follow the front wheel 4. That is, since 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.
　また、前記規制機構１６０は、
　前記カバー部材１３０に固定され、前記前輪４の前側が車体の内側へと所定の操舵角度Ａ１だけ回動した際に車体の一部分と当接することで前記カバー部材１３０の回動を規制する前側規制部１６２（第一規制部）と、
　前記カバー部材１３０に固定され、前記前輪４の後側が車体の内側へと所定の操舵角度Ａ２だけ回動した際に前記一部分と当接することで前記カバー部材１３０の回動を規制する後側規制部１６４（第二規制部）と、
　を具備するものである。
　このように構成することにより、簡素な構成でカバー部材１３０の回動を規制することができる。 Also, 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),
A 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
With such a configuration, the rotation of the cover member 130 can be restricted with a simple configuration.
　また、前記規制機構１６０は、
　前記前側規制部１６２及び前記後側規制部１６４の前記カバー部材１３０に対する固定位置を変更可能な調節機構（前側ナット１６１ａ及び後側ナット１６３ａ）をさらに具備するものである。
　このように構成することにより、カバー部材１３０の回動が規制される前輪４の操舵角度を任意に変更することができる。これによって、車体の形状や作業内容、作業者の好みに応じた設定が可能となる。 Also, 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.
　また、前記一部分は、
　前記前輪４に動力を伝達するフロントアクスル機構３０のケース（ベベルギヤケース３２）の接合部（フランジ部３２ａ）である。
　このように構成することにより、前側規制部１６２及び後側規制部１６４が当接する部位（フランジ部３２ａ）の確認が容易となる。これによって、前側規制部１６２及び後側規制部１６４の位置の調節が容易となる。 Also, 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.
With this configuration, it is easy to check the portion (flange portion 32 a) where the front side regulation portion 162 and the rear side regulation portion 164 abut. By this, adjustment of the position of the front side regulation part 162 and the back side regulation part 164 becomes easy.
　また、フェンダ支持構造１００は、
　前記前輪４の操舵角度が、車体が直進する操舵角度にされた状態において、
　前記前側規制部１６２の方が、前記後側規制部１６４よりも前記フランジ部３２ａから左右方向に離れた位置にあるものである。
　このように構成することにより、より適切に前輪フェンダ１０を前輪４に追従させることができる。 Also, 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.
　また、トラクタ１（作業車両）は、フェンダ支持構造１００を具備するものである。
　このように構成することにより、前輪４の左右への操舵に伴う前輪フェンダ１０の干渉を抑制することができる。 In addition, 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.
　また、前記前輪フェンダ１０は、
　その前端が、前後方向において前記前輪４の前端よりも前方に位置するように形成されるものである。
　このように構成することにより、前輪４の泥はね、特に、後進時の泥はねを効果的に抑制することができる。 Further, 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.
　なお、本実施形態に係るベース部材１１０は、本発明に係る第一回動体の実施の一形態である。
　また、本実施形態に係る前輪フェンダ１０は、本発明に係るフェンダの実施の一形態である。
　また、本実施形態に係るカバー部材１３０は、本発明に係る第二回動体の実施の一形態である。
　また、本実施形態に係る上端部１５３ｂ及び下端部１５３ｃは、本発明に係るねじりばねの両端部の実施の一形態である。
　また、本実施形態に係る第一固定軸１５１は、本発明に係る第一固定部の実施の一形態である。
　また、本実施形態に係る第二固定軸１５２は、本発明に係る第二固定部の実施の一形態である。
　また、本実施形態に係る前側規制部１６２は、本発明に係る第一規制部の実施の一形態である。
　また、本実施形態に係る後側規制部１６４は、本発明に係る第二規制部の実施の一形態である。
　また、本実施形態に係る前側ナット１６１ａ及び後側ナット１６３ａは、本発明に係る調節機構の実施の一形態である。
　また、本実施形態に係るベベルギヤケース３２のフランジ部３２ａは、本発明に係るフロントアクスル機構のケースの接合部の実施の一形態である。
　また、本実施形態に係る第一ブッシュ１３１は、本発明に係る保護部材の実施の一形態である。 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.
Moreover, the cover member 130 which concerns on this embodiment is one form of embodiment of the 2nd rotation body which concerns on this invention.
Moreover, 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.
Moreover, the 1st fixed axis | shaft 151 which concerns on this embodiment is one form of embodiment of the 1st fixing | fixed part which concerns on this invention.
The second fixed shaft 152 according to the present embodiment is an embodiment of the second fixed portion according to the present invention.
Further, the front side regulating portion 162 according to the present embodiment is an embodiment of the first regulating portion according to the present invention.
Moreover, 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.
Further, 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.
Further, 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.
　以上、本発明の一実施形態を説明したが、本発明は上記構成に限定されるものではなく、特許請求の範囲に記載された発明の範囲内で種々の変更が可能である。 As mentioned above, although one Embodiment of this invention was described, this invention is not limited to the said structure, A various change is possible within the range of the invention described in the claim.
　例えば、規制機構１６０は、本実施形態の構成に限るものではなく、前輪４の操舵角度が左右にそれぞれ所定の値以上となった場合に、カバー部材１３０の回動を規制することができるものであればよい。また、前側規制部１６２及び後側規制部１６４が当接する部位は、フロントアクスル機構３０のフランジ部３２ａに限るものではなく、任意に設定することができる。 For example, 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 | part which the front side control part 162 and the rear side control part 164 contact | abut is not restricted to the flange part 32a of the front axle mechanism 30, It can set arbitrarily.
　また、本実施形態ではナット（前側ナット１６１ａ及び後側ナット１６３ａ）を用いて前側規制部１６２及び後側規制部１６４の固定位置を変更可能としたが、本発明はこれに限るものではなく、任意の方法で前側規制部１６２等の固定位置を変更可能とすることができる。 Moreover, although 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.
　また、本実施形態においては、操舵角度Ａ１が、操舵角度Ａ２よりも大きくなるように形成されるものとしたが、本発明はこれに限らず、当該操舵角度Ａ１及び操舵角度Ａ２は、トラクタ１の形状（ボンネット７の形状）等に応じて適宜設定することが可能である。 Further, in the present embodiment, the steering angle A1 is formed to be larger than the steering angle A2. However, 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.
　また、本実施形態においては、前輪フェンダ１０の前端は、前輪４の前端よりもやや前方に位置するように形成される（図１参照）ものとしたが、本発明はこれに限るものではない。例えば、図１１（ａ）に示す第一変形例のように、前後方向において、前輪フェンダ１０の前端を、前輪４の前端と同一位置Ｙに配置することも可能である。このように、前輪フェンダ１０の前端が、前輪４の前端と同一か、前輪４の前端よりも前方に位置するように形成することで、当該前輪４による泥はね、特に、後進時の泥はねを効果的に防止することができる。 Further, in the present embodiment, 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. . For example, as in the first modification shown in FIG. 11A, 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. As described above, by forming the front end of the front wheel fender 10 to be the same as the front end of the front wheel 4 or positioned forward of the front end of the front wheel 4, mud splashing by the front wheel 4, in particular, mud at the time of reverse travel The splash can be effectively prevented.
　また、図１１（ｂ）に示す第二変形例のように、前輪フェンダ１０を、前輪４の外周の半分以上を覆うように形成することも可能である。より具体的には、側面視において、前輪４の外周の半分以上（すなわち、前輪４の回動軸を中心として１８０度以上の範囲）を、外側から覆うように前輪フェンダ１０を形成することも可能である。このように構成することにより、前輪４の外周の広い範囲を覆うことができるため、当該前輪４の泥はねを効果的に抑制することができる。 Further, as in the second modified example shown in FIG. 11B, 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.
　また、本実施形態においては、前輪フェンダ１０の回動軸（すなわち、カバー部材１３０の回動軸１２０）は、前輪４の回動軸（すなわち、前輪ケース３３の回動軸）の軸線と一致するように配置されるものとしたが、本発明はこれに限るものではない。 Further, in the present embodiment, the pivot axis of the front wheel fender 10 (that is, the pivot axis 120 of the cover member 130) coincides with the axis of the pivot axis of the front wheel 4 (that is, the pivot axis of the front wheel case 33). However, the present invention is not limited to this.
　例えば、図１２（ａ）に示すように、前輪フェンダ１０の回動軸（図１２におけるＣ１）と、前輪４の回動軸（図１２におけるＣ２）とを、異なる位置に配置することも可能である。具体的には、図１２に示す例では、前輪フェンダ１０の回動軸Ｃ１を、前輪４の回動軸Ｃ２よりも外側（前輪４側）に位置するように設定している。このように構成することにより、図１２（ｂ）及び図１２（ｃ）に示すように、前輪フェンダ１０がよりトラクタ１の車体（ボンネット７等）に干渉し難くなる。また、前輪フェンダ１０と前輪４とのずれが少なくなるため、前輪４による泥はねをより効果的に防止することができる。このような観点から、前輪フェンダ１０の回動軸Ｃ１は、極力前輪４の幅方向中心に近い位置に設定することが望ましい。 For example, as shown in FIG. 12 (a), 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. In addition, since the difference between the front wheel fender 10 and the front wheel 4 is reduced, mud splashing by the front wheel 4 can be more effectively prevented. From such a viewpoint, it is desirable to set the rotation axis C1 of the front wheel fender 10 as close to the center of the front wheel 4 in the width direction as possible.
　また本実施形態では、ねじりばね１５３の両端部（上端部１５３ｂ及び下端部１５３ｃ）は、カバー部材１３０が初期位置にある状態において、平面視略平行に延びるように形成されるものとした（図５参照）が、本発明はこれに限るものではない。 Further, in the present embodiment, 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.
　例えば、図１３に示す変形例のように、ねじりばね１５３の両端部（上端部１５３ｂ及び下端部１５３ｃ）は、先端（径方向内側）に向かって互いの隙間が小さくなる（互いに近接する）ように形成されるものであってもよい。当該隙間に第一固定軸１５１及び第二固定軸１５２を配置することによって、第一固定軸１５１及び第二固定軸１５２が、当該両端部（上端部１５３ｂ及び下端部１５３ｃ）と係合し易くなる。これによって、第一固定軸１５１及び第二固定軸１５２と当該両端部との係合が、車体の揺れ等によって意図せず解除されるのを防止することができる。 For example, as in the modification shown in FIG. 13, 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 By arranging the first fixed shaft 151 and the second fixed shaft 152 in the gap, 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. By this, it is possible to prevent the engagement between the first fixed shaft 151 and the second fixed shaft 152 and the both ends from being unintentionally released due to the shaking or the like of the vehicle body.
　また、この場合、平面視における上端部１５３ｂと下端部１５３ｃとの間の隙間は、径方向外側ほど大きくなる。従ってこの場合、図１３に示す変形例のように、第一固定軸１５１及び第二固定軸１５２のうち、径方向外側に位置するもの（本実施形態では、第二固定軸１５２）の径を大きくすることが好ましい。すなわち、カバー部材１３０が初期位置にある状態において、第一固定軸１５１及び第二固定軸１５２のいずれもが、上端部１５３ｂ及び下端部１５３ｃと接する（係合する）ように、当該第一固定軸１５１及び第二固定軸１５２の径を適宜設定することが望ましい。これによって、カバー部材１３０の回動位置を初期位置に保持するための保持力を適切に発生させることができる。 Further, in this case, 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.
　以上の如く、変形例に係るねじりばね１５３の両端部（上端部１５３ｂ及び下端部１５３ｃ）は、
　前記カバー部材１３０が前記初期位置にある状態において、前記カバー部材１３０の回動軸１２０の軸線方向から見て、径方向内側に向かって互いに近接するように形成され、
　前記第一固定軸１５１及び前記第二固定軸１５２は、
　前記両端部の間に配置されているものである。
　このように構成することにより、第一固定軸１５１及び第二固定軸１５２と当該両端部とを係合しやすくすることができる。 As described above, both end portions (upper end portion 153 b and lower end portion 153 c) of the torsion spring 153 according to the modified example are:
When the cover member 130 is in the initial position, 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 | positioned between the said both ends.
By comprising in this way, it can be made easy to engage the 1st fixed axis | shaft 151 and the 2nd fixed axis | shaft 152, and the said both ends.
　また、前記第一固定軸１５１及び前記第二固定軸１５２は、
　前記カバー部材１３０の回動軸１２０と略平行に延びる円柱状に形成され、
　前記第一固定軸１５１又は前記第二固定軸１５２のうち、第二固定軸１５２（径方向外側に位置するもの）は、第一固定軸１５１（径方向内側に位置するもの）よりも径が大きくなるように形成されているものである。
　このように構成することにより、カバー部材１３０の回動位置を初期位置に保持するための保持力を適切に発生させることができる。 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.
　なお、上記実施形態においては、ねじりばね１５３の両端部（上端部１５３ｂ及び下端部１５３ｃ）が平面視（図５や図１４参照）において近接した位置（第一固定軸１５１及び第二固定軸１５２を挟む位置）に配置される例を示したが、本発明はこれに限るものではなく、カバー部材１３０を初期位置に戻そうとする復元力（保持力）が得られるものであればよい。例えば、当該ねじりばね１５３の両端部を、互いに離れた位置（例えば、回動軸１２０を中心として１８０度異なる位置等）に配置することも可能である。 In the above embodiment, the positions (the first fixed shaft 151 and the second fixed shaft 152) in which both end portions (upper end portion 153b and lower end portion 153c) of the torsion spring 153 are close in plan view (see FIGS. 5 and 14). However, the present invention is not limited to this, as long as a restoring force (holding force) for returning the cover member 130 to the initial position can be obtained. For example, 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.).
　また、保持機構１５０の構成は上記実施形態に限るものではなく、カバー部材１３０を初期位置に保持しようとする保持力を発生させることができるものであればよい。例えば、ねじりばね１５３に代えて、その他種々の付勢部材を用いることも可能である。 Further, 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. For example, instead of the torsion spring 153, various other biasing members can be used.
　また、上記実施形態においては、作業車両としてトラクタ１を例示したが、本発明はその他種々の作業車両（農業車両、建設車両、産業車両等）に適用することが可能である。 Moreover, in the said embodiment, although the 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.).
　本発明は、前輪を覆うフェンダを支持するフェンダ支持構造、及びそれを具備する作業車両に適用することができる。 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.
　１　　　　トラクタ
　４　　　　前輪
　１０　　　前輪フェンダ
　３０　　　フロントアクスル機構
　３２　　　ベベルギヤケース
　３２ａ　　フランジ部
　１００　　フェンダ支持構造
　１１０　　ベース部材
　１３０　　カバー部材
　１５０　　保持機構
　１５１　　第一固定軸
　１５２　　第二固定軸
　１５３　　ねじりばね
　１５３ａ　本体部
　１５３ｂ　上端部
　１５３ｃ　下端部
　１６０　　規制機構
　１６２　　前側規制部
　１６４　　後側規制部 DESCRIPTION OF SYMBOLS 1 tractor 4 front wheel 10 front wheel fender 30 front axle mechanism 32 bevel gear case 32 a flange portion 100 fender support structure 110 base member 130 cover member 150 holding mechanism 151 first fixed shaft 152 second fixed shaft 153 torsion spring 153 a main body portion 153 b upper end portion 153 c Lower end portion 160 regulation mechanism 162 front regulation portion 164 rear regulation portion

Claims (17)

  1. 　前輪の操舵に伴って回動する第一回動体と、
    　前記第一回動体に対して相対回動可能であり、前記前輪を覆うフェンダを支持する第二回動体と、
    　前記第一回動体及び前記第二回動体に収容され、前記第二回動体の前記第一回動体に対する相対的な回動位置を、所定の初期位置に保持しようとする保持力を発生させる保持機構と、
    　前記前輪の操舵角度が左右にそれぞれ所定の値以上となった場合、前記保持力に抗して前記前輪の操舵に伴う前記第二回動体の回動を規制する規制機構と、
    　を具備するフェンダ支持構造。     A first rotating body that rotates with the steering of the front wheel,
    A second rotating body that is rotatable relative to the first rotating body and supports a fender that covers the front wheel;
    A holding member for generating a holding force which is accommodated in the first rotating body and the second rotating body and tries to hold the relative rotating position of the second rotating body with respect to the first rotating body at a predetermined initial position Mechanism,
    A restricting mechanism that restricts the rotation of the second rotating body with the steering of the front wheel against the holding force when the steering angle of the front wheel becomes equal to or greater than a predetermined value on the left and right, respectively;
    Fender support structure equipped with.
  2. 　前記第一回動体と前記第二回動体との間をシールするシール部材をさらに具備する、
    　請求項１に記載のフェンダ支持構造。     It further comprises a seal member for sealing between the first rotating body and the second rotating body.
    The fender support structure according to claim 1.
  3. 　前記第二回動体は、
    　前記第一回動体を上方及び側方から覆うように配置される、
    　請求項１又は請求項２に記載のフェンダ支持構造。     The second rotating body is
    It is arranged to cover the first rotating body from above and from the side,
    The fender support structure according to claim 1 or 2.
  4. 　前記保持機構は、
    　前記第二回動体の回動軸と略平行な軸線を有するコイル状に巻回された本体部、及び前記本体部から径方向に突出するように形成された両端部を有するねじりばねと、
    　前記第一回動体に固定され、前記両端部のいずれか一方と係合可能な第一固定部と、
    　前記第二回動体に固定され、前記両端部のいずれか他方と係合可能な第二固定部と、
    　を具備する、
    　請求項１から請求項３までのいずれか一項に記載のフェンダ支持構造。     The holding mechanism is
    A coiled main body having an axis substantially parallel to a rotation axis of the second rotating body, and a torsion spring having both end portions formed to project radially from the main body;
    A first fixing portion fixed to the first rotating body and engageable with any one of the two end portions;
    A second fixing portion fixed to the second rotating body and engageable with any one of the other end portions;
    Equipped with
    The fender support structure according to any one of claims 1 to 3.
  5. 　前記第一回動体及び前記第二回動体に収容され、前記ねじりばねを径方向外側から覆う保護部材をさらに具備する、
    　請求項４に記載のフェンダ支持構造。     A protective member is further included, the protective member being accommodated in the first rotating body and the second rotating body and covering the torsion spring from the radially outer side.
    The fender support structure according to claim 4.
  6. 　前記第一固定部及び前記第二固定部は、
    　前記第二回動体の回動軸と略平行な棒状に形成され、前記第二回動体が前記初期位置にある状態において、前記両端部のどちらにも係合する、
    　請求項４又は請求項５に記載のフェンダ支持構造。     The first fixing portion and the second fixing portion are
    The rod is formed in a rod shape substantially parallel to the rotation axis of the second rotation body, and engaged with either of the two end portions when the second rotation body is in the initial position.
    The fender support structure according to claim 4 or 5.
  7. 　前記両端部は、
    　前記本体部から径方向内側に向かって突出するように形成されている、
    　請求項４から請求項６までのいずれか一項に記載のフェンダ支持構造。     The two ends are
    It is formed to project radially inward from the main body portion,
    The fender support structure according to any one of claims 4 to 6.
  8. 　前記両端部は、
    　前記第二回動体が前記初期位置にある状態において、前記第二回動体の回動軸の軸線方向から見て、径方向内側に向かって互いの隙間が小さくなるように形成され、
    　前記第一固定部及び前記第二固定部は、
    　前記隙間に配置されている、
    　請求項７に記載のフェンダ支持構造。     The two ends are
    When the second pivoting body is in the initial position, the gap between the second pivoting body and the second pivoting body is formed so as to be smaller toward the inner side in the radial direction when viewed from the axial direction of the pivoting axis of the second pivoting body.
    The first fixing portion and the second fixing portion are
    Placed in the gap,
    The fender support structure according to claim 7.
  9. 　前記第一固定部及び前記第二固定部は、
    　前記第二回動体の回動軸と略平行に延びる円柱状に形成され、
    　前記第一固定部又は前記第二固定部のうち、径方向外側に位置するものは、径方向内側に位置するものよりも径が大きくなるように形成されている、
    　請求項８に記載のフェンダ支持構造。     The first fixing portion and the second fixing portion are
    It is formed in a cylindrical shape extending substantially in parallel with the rotation axis of the second rotation body,
    Of the first fixing portion or the second fixing portion, one located at the radially outer side is formed to have a larger diameter than one located at the radially inner side.
    The fender support structure according to claim 8.
  10. 　前記規制機構は、
    　車体が直進する状態における前記前輪の操舵角度を基準として、前記前輪の前側が車体の内側へと回動して前記第二回動体が規制される際の前記前輪の操舵角度が、前記前輪の後側が車体の内側へと回動して前記第二回動体が規制される際の前記前輪の操舵角度よりも大きくなるように形成されている、
    　請求項１から請求項９までのいずれか一項に記載のフェンダ支持構造。     The regulation mechanism
    The steering angle of the front wheel when the front side of the front wheel is turned to the inside of the vehicle body on the basis of the steering angle of the front wheel when the vehicle body goes straight is the steering angle of the front wheel when the second rotating body is restricted. It is formed to be larger than the steering angle of the front wheel when the rear side is turned to the inside of the vehicle body and the second rotating body is restricted.
    The fender support structure according to any one of claims 1 to 9.
  11. 　前記規制機構は、
    　前記第二回動体に固定され、前記前輪の前側が車体の内側へと所定の操舵角度だけ回動した際に車体の一部分と当接することで前記第二回動体の回動を規制する第一規制部と、
    　前記第二回動体に固定され、前記前輪の後側が車体の内側へと所定の操舵角度だけ回動した際に前記一部分と当接することで前記第二回動体の回動を規制する第二規制部と、
    　を具備する、
    　請求項１から請求項１０までのいずれか一項に記載のフェンダ支持構造。     The regulation mechanism
    The first front end of the front wheel is fixed to the second turning body, and when the front side of the front wheel abuts against a part of the vehicle body when turning to the inside of the body by a predetermined steering angle, the first turning regulation of the second turning body is restricted. The regulatory department,
    A second regulation that is fixed to the second pivoting body and abuts against the part when the rear side of the front wheel pivots toward the inside of the vehicle by a predetermined steering angle, thereby restricting the pivoting of the second pivoting body Department,
    Equipped with
    The fender support structure according to any one of claims 1 to 10.
  12. 　前記規制機構は、
    　前記第一規制部及び前記第二規制部の前記第二回動体に対する固定位置を変更可能な調節機構をさらに具備する、
    　請求項１１に記載のフェンダ支持構造。     The regulation mechanism
    It further comprises an adjusting mechanism capable of changing the fixed position of the first restricting portion and the second restricting portion with respect to the second rotating body,
    The fender support structure according to claim 11.
  13. 　前記一部分は、
    　前記前輪に動力を伝達するフロントアクスル機構のケースの接合部である、
    　請求項１１又は請求項１２に記載のフェンダ支持構造。     Said part is
    A joint portion of a case of a front axle mechanism that transmits power to the front wheel,
    The fender support structure according to claim 11 or 12.
  14. 　前記前輪の操舵角度が、車体が直進する操舵角度にされた状態において、
    　前記第一規制部の方が、前記第二規制部よりも前記一部分から左右方向に離れた位置にある、
    　請求項１１から請求項１３までのいずれか一項に記載のフェンダ支持構造。     In a state in which the steering angle of the front wheel is set to the steering angle at which the vehicle body travels straight,
    The first restricting portion is located at a position farther in the left-right direction from the portion than the second restricting portion.
    The fender support structure according to any one of claims 11 to 13.
  15. 　請求項１から請求項１４までのいずれか一項に記載のフェンダ支持構造を具備する作業車両。 A work vehicle comprising the fender support structure according to any one of claims 1 to 14.
  16. 　前記フェンダは、
    　その前端が、前後方向において前記前輪の前端と同一、又は前記前輪の前端よりも前方に位置するように形成される、
    　請求項１５に記載の作業車両。     The fender is
    The front end is formed to be identical to the front end of the front wheel in the front-rear direction, or to be located forward of the front end of the front wheel,
    A work vehicle according to claim 15.
  17. 　前記フェンダは、
    　前記前輪の外周を、半分以上覆うように形成される、
    　請求項１５又は請求項１６に記載の作業車両。     The fender is
    The outer periphery of the front wheel is formed to cover a half or more.
    A work vehicle according to claim 15 or 16.
PCT/JP2018/017035 2017-07-01 2018-04-26 Fender support structure and work vehicle equipped with same WO2019008885A1 (en)

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US10988185B2 (en) 2017-07-01 2021-04-27 Kubota Corporation Fender support structure and work vehicle including same
IT202000021226A1 (en) * 2020-09-08 2022-03-08 Domar S P A MUDGUARD GROUP, IN PARTICULAR FOR AGRICULTURAL AND/OR INDUSTRIAL VEHICLES, AND RELATED AGRICULTURAL AND/OR INDUSTRIAL VEHICLE
EP3964428A1 (en) * 2020-09-08 2022-03-09 DOMAR S.p.A. Mudguard group, in particular for agricultural and/or industrial vehicles, and related agricultural and/or industrial vehicle

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