JP4950556B2 - Work vehicle - Google Patents

Description

  The present invention relates to a work vehicle such as a lawn mower provided with a mower device for cutting turf grass planted on the ground, and more particularly, a steering mechanism for steering front wheels of a traveling machine body is provided on a side surface of an engine. The present invention relates to a structure of an interference preventing device for preventing interference with an accessory part such as a fuel filter case attached to the housing.

  Conventionally, an engine or the like is generally mounted on a traveling vehicle body of a work vehicle, while a round handle is attached to the upper end of a steering shaft standing on the traveling vehicle body for steering the front wheels, A configuration in which a steering gear case is provided and the steering gear case and a front wheel are connected by a steering mechanism including a drag rod is known (see Patent Document 1).

On the other hand, since the travel location of the work vehicle such as a tractor is uneven, the left and right rear wheels are grounded and the left and right front wheels are grounded to maintain a four-point ground and perform stable traveling. For this reason, it is also known that the left and right front wheels are configured to swing up and down ( up and down swing) with respect to the traveling machine body (see Patent Document 2).
JP-A-7-251747 JP 2002-96763 A

By the way, in the structure of patent document 2, when the drag rod in the steering mechanism for steering the left and right front wheels extends in the front-rear direction of the traveling machine body on the side of the engine, the drag rod is connected. When the front wheel on the side is steered so as to be directed toward the turning outer diameter side and the vertical swing ( up / down swing) that rotates upward occurs, the drag rod approaches the side surface of the engine. Displace as follows. Therefore, usually, a swing stopper for limiting the maximum rolling angle of the left and right front wheels, and a turning angle stopper for limiting the maximum turning angle of the left and right front wheels in the steering mechanism are provided. and it is configured so that it can not be vertically swingable and turning more than necessary.

However, because there are product tolerances and mounting errors of the steering mechanism, the vertical swing mechanism, the swing stopper part, and the turning angle stopper part, if an accessory such as a fuel filter case is arranged on the side of the engine, this attachment There has been a problem that interference such as collision of the drag rod with the part or rubbing may occur and the attached part may be damaged.

  The present invention prevents the above-mentioned unexpected situation from occurring, that is, prevents the accessory parts fixed to one side of the engine from being damaged by the drag rod and hinders the replacement of the accessory parts. The purpose is to provide a working vehicle without.

To achieve the above object, the work vehicle of the invention according to claim 1, equipped with an engine in the front of the vehicle body, it erected the steering column to the rear of the engine, the axis and the steering column, in the longitudinal direction and right and left two front wheels and placed under a front portion of the vehicle body in the vertical swinging ready to pivot shaft around with, in the working vehicle is interlockingly connected through a steering mechanism, or the right and left in the one engine An accessory such as a fuel filter case is fixed to a lower portion on the side, and the steering mechanism includes a drive gear at the lower portion of the steering column, a horizontally rotatable driven gear meshing with the drive gear, and the driven gear. A drag rod that connects one end of a knuckle arm provided on a king pin of the front wheel on the side where the accessory is disposed, Ragguroddo is arranged so as to extend forwardly above the vehicle body, the side surface of the engine, between the middle portion of the accessory and the drag rod to prevent interference with the accessory and the drag rod When the front wheel on the side to which the drag rod is connected is steered so as to be on the turning outer diameter side and the front wheel rotates upward, The steering mechanism is configured such that a midway part of the rod approaches the stopper piece for preventing interference .

The invention described in claim 2 is the work vehicle according to claim 1, wherein the interference preventing stopper piece is one that is fixed to the mounting bracket of the engine side of the rubber vibration isolator.

According to a third aspect of the present invention, in the work vehicle according to the first or second aspect , the interference-preventing stopper piece is connected to the axis of the drag rod from the side surface of the engine in the vicinity of the arrangement position of the accessory part. It protrudes so as to intersect and is formed so as not to cover the surface of the accessory.

  According to the first aspect of the present invention, the drag rod in the steering mechanism is disposed above the traveling machine body and extends back and forth along one side surface of the engine, so that the drag rod is disposed on the bottom surface of the engine. Compared with what is arrange | positioned at the lower part, the ground height of a drag rod can be kept high, an engine can be arrange | positioned as low as possible, and a working vehicle with a low center of gravity can be provided. In addition, the drag rod displacement when turning operation (steering operation) is reduced by the interference prevention stopper piece fixed between the accessory part arranged on the side of the engine and the middle part of the drag rod. Even if it is larger, damage to the accessory can be prevented.

Further, when the front wheel on the side where the drag rod is connected is steered so as to be on the turning outer diameter side, and when the front wheel rotates upward, the middle part of the drag rod is the stopper for preventing interference. Since the steering mechanism is configured so as to approach the piece, the behavior of the front wheel as described above can prevent damage to the accessory even if the displacement of the drag rod is large.

According to the invention according to claim 2 , since the interference preventing stopper piece is fixed to the mounting bracket on the engine side of the vibration isolating rubber, the work for retrofitting the interference preventing stopper piece becomes easy. .

According to the invention of claim 3 , the stopper piece for preventing interference projects from the side surface of the engine so as to intersect the axis of the drag rod in the vicinity of the position where the accessory part is disposed, and the accessory part Therefore, it is possible to more easily replace and assemble the accessory parts while preventing damage to the accessory parts.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the present invention will be described below with reference to the drawings. 1 is a side view of the lawn mower as a whole, FIG. 2 is a plan view thereof, FIG. 3 is a side view showing a front portion of a traveling machine body, FIG. 4 is a plan view thereof, and FIG. 3 is an enlarged view taken along the line VV in FIG. 3, and FIG. 6 is an operation diagram of the steering mechanism.

  First, an outline of a lawn mower will be described with reference to FIGS. 1 and 2. In the lawn mower of this embodiment, the traveling machine body 1 includes left and right machine body frames 3 and 4 that are integrally connected via a plurality of horizontal rail frames 2. The body frames 3 and 4 are supported by left and right front wheels 5 and left and right rear wheels 6 arranged in front and rear of the left and right sides.

  An engine 9 as a power source is built in the hood 8 on the upper side of the front cowl 7 that covers the front upper surface of the traveling machine body 1. A steering column portion 11 having a round steering handle 10 is mounted on the upper side of the rear portion of the bonnet 8. A shift pedal 12 for appropriately adjusting the vehicle speed and a brake pedal 13 for braking the traveling machine body 1 are disposed below the right side in the traveling direction of the steering column unit 11.

  A driver seat 15 is provided on the rear cowl 14 that covers the rear upper surface of the traveling machine body 1. When the operator sitting on the driver's seat 15 turns the steering handle 10, the steering of the left and right front wheels 5 is steered according to the operation amount (turning amount) of the handle 10 via a steering mechanism 45 described in detail later. The angle (also referred to as steering angle or steering angle) is changed. On the left side of the driver's seat 15, a mower elevating lever 17 for elevating and lowering a mower device 16 described later is provided so as to be able to rotate back and forth. A PTO clutch lever 18 for driving or stopping the mower device 16 is provided on the right side of the driver seat 10 so as to be able to rotate back and forth.

  In the rear cowl 12, a mission case 19 having a hydrostatic continuously variable transmission (HST type) and the like is disposed. An inclined portion having a front, low, rear, and high shape is formed at the rear of the body frames 3 and 4, and the mission case 19 is supported at an intermediate portion of the front and rear width of the inclined portions of the body frames 3 and 4. The mission case 19 is configured to transmit power from the engine 9 to the left and right rear wheels 6 by appropriately shifting power from the engine case 19. A fuel tank 20 that supplies fuel to the engine 9 is mounted at the rear end of the inclined portion of the body frames 3 and 4. An oil tank 21 that supplies hydraulic oil to the hydrostatic continuously variable transmission 100 of the mission case 19 is mounted outside the inclined portion of the right body frame 4. On the side opposite to the oil tank 21, a battery 22 used for starting the engine 9 is mounted outside the inclined portion of the left body frame 3 so as to sandwich the fuel tank 20.

  A mower device 16 for lawn mowing is mounted on the lower surface of the body frame 2 between the left and right front wheels 5 and the left and right rear wheels 6 through a front and rear link rods 23 and 24. . The mower device 16 is provided with a pair of left and right rotary cutting blades (not shown) that can rotate horizontally in a mower case 25 having a downward-opening bowl shape. Further, on the front and rear sides of the left and right sides of the mower case 25, four front and rear gauge wheels 26 and 27 for adjusting the height of the mower device 16 when lowered are attached. A duct portion 28 that opens rearward is provided on the upper surface of the mower case 25.

  The duct portion 28 communicates with a grass collection box 30 disposed at the rear portion of the traveling vehicle body 1 via a discharge duct 29 disposed between the left and right rear wheels 6 on the lower surfaces of the body frames 3 and 4. The grass collection box 30 is formed by stretching a net-like sheet in a square box shape, and the upper surface of the grass collection box 30 is covered with a dust-proof cover 31. The turf grass cut by the rotary cutting blade in the mower case 25 is conveyed from the duct portion 28 to the inside of the grass collection box 30 through the discharge duct 29 by the wind of the rotary cutting blade, and is cut by the mower device 16. Are collected in the grass collection box 30.

  Next, the power transmission system of the lawn mower will be described with reference to FIGS. 1 and 2. In the lawn mower of this embodiment, a two-wheel drive system is adopted in which a part of the rotational power of the engine 9 is distributed to the left and right rear wheels 6.

  That is, a part of the rotational power of the engine 9 is forward from the rear end portion of the output shaft 32 protruding forward and backward outward from the engine 9 and the propulsion shaft 33 having universal joints at both front and rear ends, and the transmission case 19. Is transmitted to the transmission case 19 via a traveling transmission relay case 34 disposed at the above-described portion and an endless input belt 35 described later. Then, from the horizontal rear wheel drive shaft 36 projecting outward in the left and right directions on the transmission case 19, the rear part of the traveling machine body 1 through the endless rear wheel drive chain 37 and the sprocket 38 (the reference numeral of one sprocket is omitted). Is transmitted to the left and right longitudinal axles. As a result, the rear wheels 6 attached to the left and right ends of the axle are driven to rotate.

  On the other hand, the other rotational power of the engine 9 is transmitted from the front end portion of the output shaft 32 to the PTO shaft 42 pivotally supported on the front portion of the body frame 4 via the endless PTO transmission belt 41 for PTO power transmission. . Next, power is transmitted from the PTO shaft 42 to a mower gear box 44 disposed on the right side of the body frame 4 on the upper surface of the mower case 25 through an intermediate shaft 43 having universal joints at both front and rear ends. . As a result, the left rotary cutting blade (not shown) in the mower case 25 is driven to rotate clockwise in plan view, and the right rotary cutting blade (not shown) is driven to rotate counterclockwise in plan view. Thus, while cutting the turf grass, the cut turf grass is collected at the center of the left and right width of the mower case 25 and discharged from the duct portion 28 to the discharge duct 29.

  Next, the support structure and the like of the engine 9 will be described with reference to FIGS. In the bonnet 8, there are a radiator 50 with a shroud 52 attached to the front surface and a radiator fan 51 attached to the rear surface of the engine 9 in a space before and after the engine 9 and the steering shaft 10 a of the steering handle 10. Has been placed.

  The lower end of the radiator 50 is elastically supported by grommet-like vibration isolating rubber, bolts and nuts, etc. on bracket frames 53 and 53 projecting from the upper surfaces of the left and right body frames 3 and 4 (see FIG. 3). ). The upper end of the radiator 50 extends from the front ends of the left and right body frames 3 and 4 and extends rearwardly in the bonnet 8, and a cylindrical steering column 10c with a steering shaft 10a installed therein. It is connected to the bracket 10b (see FIG. 3).

  Although not shown, the radiator fan 51 rotatably mounted on the rear surface of the engine 9 via a bearing is rotationally driven between the auxiliary output shaft and a pulley and a V belt.

  The engine 9 is connected to the traveling machine body 1 via a pair of left and right first vibration isolating rubbers 63a and 63b located on the side close to the radiator fan 51 in the engine 9 and a pair of left and right second vibration isolating rubbers 64a and 64b located on the far side. To be elastically supported.

  More specifically, the left and right side walls on the lower side of the engine 9 are provided with engine side brackets 60 and 61 that are long in the front-rear direction of the traveling machine body 1 (long along the crankshaft (not shown)). Secure with multiple bolts. The left engine-side bracket 60 facing the advancing direction of the traveling machine body 1 is bent outward and upward at a flat plate-like vertical plate portion 60a that is linearly long in the front-rear direction and a lower front end of the vertical plate portion 60a. A front mounting plate 65, a reinforcing rib plate 65a that welds and fixes the vertical plate portion 60a and the rear end portion of the front mounting plate 65, and a rear mounting portion that is bent outward and upward at the upper rear end portion of the vertical plate portion 60a. A plate 66, and a U-shaped reinforcing rib 67 in plan view, which is fixedly connected by welding to the lower surface side of the mounting plate 66 and the front and rear middle portions of the vertical plate portion 60a (see FIGS. 3 to 5).

  The engine-side bracket 61 on the right side facing the forward direction of the traveling machine body 1 includes a flat plate-like vertical plate portion 61a that is long in the front and rear directions, and a front mounting plate 71 that is bent outward and upward at a lower front end of the vertical plate portion 60a. The reinforcing rib plate 71a which welds and fixes the vertical plate portion 61a and the rear end portion of the front mounting plate 71, and the upper and lower middle portions of the rear end of the vertical plate portion 60a are welded and protruded outward. A rear mounting plate 72 and a U-shaped reinforcing rib 73 that is fixedly connected by welding to the upper surface side of the rear mounting plate 72 and the front and rear middle portions of the vertical plate portion 61a (see FIG. 4).

  On the other hand, in order to elastically support the second prevention rubbers 64a and 64b, the inclined parts at the left and right ends of the front body side bracket 68 fixed to the left and right body frames 3 and 4 by welding or the like are spindle-shaped first. 2 The lower end of the mounting bolt inserted into the prevention rubbers 64a and 64b is inserted and fastened with a nut.

  Rear body side brackets 75 and 76 having an inverted L-shaped cross section for elastically supporting the lower side of the first vibration isolation rubbers 63a and 63b are attached to the left and right body frames 3 and 4 by welding or the like, respectively. The Note that the left body frame 3 side is reinforced by a plurality of pipes 77 erected from the left body frame 3 in order to be disposed at a position higher than the upper surface.

  Therefore, the engine side brackets 60 and 61 fixed to the left and right side walls of the engine 9 are formed in the longitudinal direction along the crankshaft of the engine 9, and the mounting plates (66 and 72 at both longitudinal ends of the engine side brackets 60 and 61 are provided. , 65, 71) and the first vibration isolating rubber 63a, 63b and the second vibration isolating rubber 64a, 64b are respectively mounted (inserted) between the body side brackets 75, 76, 68a, 68b. . The left and right sides of the traveling machine body 1 as the axes of the mounting bolts of the second vibration isolation rubbers 64a and 64b and the first vibration isolation rubbers 63a and 63b for supporting the left and right sides of the front and rear portions of the engine 9 go upward. It inclines so that it may approach the center (refer FIG.3, FIG4 and FIG.5).

  As shown in FIG. 4, the right body frame 4 is linear along the traveling direction of the traveling body 1 in plan view. The left fuselage frame 3 has a large gap with the right fuselage frame 4 on the arrangement side of the radiator 50 in a plan view, but the gap between the left fuselage frame 3 and the right fuselage frame 4 is narrow in the frame part 3a on the front side of the engine 9. In the middle part (from the rear side of the engine 9 to the front and rear middle part), it is formed in an inclined shape in plan view.

  Next, the steering mechanism 45 will be described. A small-diameter drive gear 46 is fixed to the lower end of the steering shaft 10a in the steering column 10c erected at the rear portion of the engine 9 so as to rotate integrally. A driven gear 47 that meshes with the drive gear 46 is provided on the traveling machine body 1 through a vertical axis 48 (see FIG. 3). The driven gear 47 is disposed in the vicinity of the center position in the left-right direction of the traveling machine body 1 (see FIG. 4). Various accessory parts are arranged on the left and right side walls of the engine 9. For example, a fuel injection pump 56 is fixed to the upper side of the left side wall in the traveling direction of the traveling machine body 1, and a fuel supply pump 58 and a fuel filter case 57 are fixed to the lower side thereof (see FIG. 3). .

The steering mechanism 45 connects the driven gear 47 and one end of the knuckle arm 79 provided on the king pin 78a of the front wheel 5 on the side where the fuel filter case 57 is disposed (left side in the traveling direction of the traveling machine body 1). And a drag rod 80. More specifically, the left and right central portions of the axle case 82 are mounted on a pivot shaft 83 having an axial line in the front-rear direction on the lower surface of the traveling machine body 1 so as to be able to swing vertically . Further, swinging arms (knuckle arms) 84 a and 84 b that protrude rearward from the axles of the left and right wheels 5 are rotatably mounted on king pins 78 a and 78 b provided at both ends of the axle case 82. The rear ends of the left and right swing arms (knuckle arms) 84a and 84b are connected by a tie rod 85 so as to be rotatable. The knuckle arm 79 is formed integrally with a swinging arm (knuckle arm) 84a, and the tip of the knuckle arm 79 and the front end (rod end) 80b of the drag rod 80 are pivotally attached via a pin. (See FIGS. 3, 4 and 6).

Further, a rear end portion (rod end) 80a of the drag rod 80 is pivotally mounted on the lower surface side of the driven gear 47 by a pin 81 provided at a position eccentric from the rotation shaft of the driven gear 47 ( (See FIG. 3). When the left and right front wheels 5 and 5 are in contact with the horizontal ground (not swinging up and down ), the drag rod 80 is positioned above the left fuselage frame 3 as a whole as shown in FIG. In addition, the entire portion of the drag rod 80 is bent in a mountain shape so that the middle portion is on the upper side.

  With this configuration, when the components (the drag rod 80, the knuckle arm 79, the swinging arms 84a and 84b, and the tie rod 85) of the steering mechanism 45 in the straight traveling state are indicated by solid lines in FIG. In FIG. 6, the drive gear 46 rotates in the direction of arrow A, and therefore the driven gear 47 rotates in the direction of arrow C. Accordingly, the rear end portion 80a of the drag rod 80 is pulled rightward in FIG. 6, so that the knuckle arm 79 is connected to the knuckle arm 79 in FIG. 6 via the drag rod 80 (see the two-dot chain line state in FIG. 6). The left front wheel 5 that rotates clockwise and is on the outside of the turn is steered rightward as indicated by a two-dot chain line in FIG. By connecting the left and right swing arms (knuckle arms) 84a and 84b and the tie rod 85, the front wheel 5 on the inner side of the turning is also steered rightward. When the handle 10 is rotated to the left, the drive gear 46 is rotated in the direction of arrow B and the driven gear 47 is rotated in the direction of arrow D, contrary to the above. Accordingly, the drag rod 80 is pushed leftward in FIG. 6, and the left and right front wheels 5, 5 are steered in the leftward turning direction.

  By the way, when the stopper ink is used so that the left front wheel 5 is raised in a state where the steering direction is changed at a large turning angle (for example, about 45 degrees) so that the left front wheel 5 is on the outside of the turn, as described above. Since the left and right wheels 5 and 5 are provided at both ends of the axle case 84 that swings and swings around the pivot shaft 38, for example, the left and right wheels 5 and 5 are swung so that the left front wheel 5 rises in FIG. In some cases, naturally, the front end side of the drag rod 80 (the vicinity connected to the knuckle arm 79) rises. Further, since the connecting portion between the front end portion 80b of the drag rod 80 and the knuckle arm 79 is at a position higher than the axle center of the front wheel 5 (see FIG. 3), in FIG. 6 (plan view), the connecting portion Is displaced toward the center of the traveling machine body 1 in the left-right direction, and the drag rod 80 approaches the center of the traveling machine body 1 in the left-right direction, and thus the left side wall of the engine 9, as indicated by the one-dot chain line in FIG. Will be displaced as follows.

  A stopper for restricting the maximum turning angle of the left and right front wheels 5 and 5 is provided so as to limit the maximum turning angle of the driven gear 47 (not shown), and the maximum value of the swing angle is provided. Stopper means for restricting the engine is provided between the lower surface of the traveling machine body 1 and the upper surface of the axle case 82. However, since there are manufacturing accuracy and assembly tolerances of each component of the steering mechanism 45, this engine When the fuel filter case 57 is disposed so as to protrude from the left side wall of the drag 9, the drag rod 80 is in a state of a large right turn and a large upward swing of the left front wheel 5 as described above. In the unlikely event that the front part of the midway collides with or rubs against (contacts with) the fuel filter case 57, the side of the engine 9 is dragged with the accessory parts. Between the middle portion of the head 80 is to fixedly interference prevention stopper piece 86.

  One of the embodiments is an outwardly plate-like interference prevention stopper piece 86 on the outer surface of a reinforcing rib 67 surrounding the outer periphery of the rear left vibration isolating rubber 63a in the engine side bracket 60 fixed to the left side wall of the engine 9. The interference prevention stopper piece 86 is connected to the axis of the drag rod 80 from the side surface of the engine 9 in the vicinity of the arrangement position of the fuel filter case 57 as an accessory (near the rear side). It projects so as to intersect and is formed so as not to cover the surface of the accessory (fuel filter case 57). In other words, in the embodiment, the interference prevention stopper piece 86, which is a metal flat plate, protrudes so as to be orthogonal to the side surface of the engine 9, and does not interfere with the replacement operation of the accessory (fuel filter case 57). It is arranged only on the rear side of the filter case 57), and the vertical free end edge 86a of the interference preventing stopper piece 86 is vertical (see FIG. 5). In addition, the cover part and cock part of the fuel filter case 57 are located on the upper side. In FIG. 5, an arrow R indicates a locus in which the drag rod 80 approaches the free end edge 86 a of the interference prevention stopper piece 86 when the left front wheel 5 swings upward.

  By fixing the interference prevention stopper piece 86 to the engine side bracket 60, the interference prevention stopper piece 86 can be retrofitted to the engine 9.

  Further, when the work vehicle has a small turning radius (a large maximum turning angle that should be allowed by the front wheels 5), such as a lawn mower, and performs work on an inclined land, the above-mentioned interference prevention Due to the presence of the stopper piece 86, it is possible to easily replace an accessory (such as the fuel filter case 57) disposed on one side of the engine 9 while preventing damage to the component.

  When the front wheel 5 on the side to which the drag rod 80 is connected is steered so as to be on the turning outer diameter side, and when the front wheel 5 is rotated upward, the middle part of the drag rod 80 is a stopper piece for preventing interference. The drag rod 80 in the steering mechanism is disposed above the left airframe frame 3 as the traveling airframe so as to be close to 86 and to extend back and forth along one side surface of the engine 9. Compared to the configuration in which 80 is disposed at the bottom of the bottom surface of the engine 9, the ground height of the drag rod 80 can be kept high, the engine 9 can be disposed as low as possible, and a work vehicle having a low center of gravity can be provided.

It is the whole lawn mower side view. It is the same top view. It is a side view which shows the front part of a traveling body. It is the same top view. It is a rear view of the engine mounting part seen from the rear part of the traveling body. It is a schematic diagram of a steering mechanism.

1 traveling body 3, 4 body frame 5 front wheel (traveling part)
6 Rear wheels (traveling part)
9 Engine 16 Mower device (mowing unit)
45 Steering mechanism 46 Drive gear 47 Driven gear 57 Fuel filter case 60 Left engine side bracket 61 Right engine side bracket 63a, 63b First vibration isolation rubber 64a, 64b Second vibration isolation rubber 75, 76 Airframe side bracket 78a, 78b King pin 79 Knuckle arm 80 Drag rod 86 Anti-interference stopper piece

Claims (3)

An engine is mounted on the front part of the traveling machine body, a steering column is erected on the rear part of the engine, and the steering column and the lower part of the traveling machine body can swing up and down around a pivot shaft having an axis in the front-rear direction. and right and left two front wheels and placed on the front, in a working vehicle which is interlockingly connected through a steering mechanism,
An accessory such as a fuel filter case is fixed to the lower part of the left or right side of the engine,
The steering mechanism includes a drive gear below the steering column, a horizontally rotatable driven gear meshing with the drive gear, and a knuckle provided on the king pin of the front wheel on the side where the driven gear and the accessory are disposed. A drag rod connecting one end of the arm,
The drag rod is disposed to extend forward above the traveling body,
On the side surface of the engine, an interference preventing stopper piece for preventing interference between the accessory part and the drag rod is fixed between the accessory part and the middle part of the drag rod ,
When the front wheel to which the drag rod is connected is steered so as to be on the turning outer diameter side, and when the front wheel is turned upward, the middle part of the drag rod becomes the interference prevention stopper piece. A work vehicle characterized in that the steering mechanism is configured to approach . The work vehicle according to claim 1, wherein the interference prevention stopper piece is fixed to a mounting bracket on the engine side of an anti-vibration rubber. The stopper piece for preventing interference is formed so as to protrude from the side surface of the engine so as to intersect the axis of the drag rod in the vicinity of the position where the accessory part is disposed, and so as not to cover the surface of the accessory part. working vehicle according to claim 1 or 2, characterized in that there.

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