JP2020026176A - Work vehicle - Google Patents

Abstract

To provide a work vehicle having an engine hood which can be inexpensively and securely molded and nearer to which a headlight that is disposed or borne on a front side of the engine hood can be simply and smoothly attached.SOLUTION: In a work vehicle having an engine hood, the engine hood includes a front cover that covers a forward area of an engine room, and a main cover that covers above and both sides of the engine room. The front cover includes a resin cover body that is curved to shield the front side of the engine hood, and has a light support, to which a headlight is detachably attached, and an orifice molded integrally, and a metal plate that blocks the orifice of the cover body and upgrades the intensity of the cover body. The metal plate has meshes or plural air vents.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a work vehicle provided with a bonnet including a cover body made of resin.

  In a work vehicle provided with a bonnet, the bonnet includes a resin front grille and a metal cover body that covers an upper part and both sides of an engine room and has an opening formed on a front side to which the front grille is attached. The work vehicle described in Patent Document 1 formed by the above is conventionally known.

  According to the work vehicle of Patent Literature 1, the front grille on the front side of the hood in which the ventilation holes and the like are formed is made of resin, so that the hood can be configured at lower cost and the hood can be lighter. You can do it.

  However, the hood has a problem that the strength of the front grille, in which the ventilation holes are also formed, is not sufficient because the entire front grille is also made of resin. The portion and the like are also resin-molded, and there is a problem that the manufacturing cost of the entire hood is increased by molding the metal cover body into a shape into which the front grill can be fitted.

JP 2013-6513 A

  The present invention provides a work vehicle equipped with a bonnet, in which a headlight disposed and supported on the front side of the bonnet can be more easily and smoothly attached to the bonnet side, and the bonnet is more inexpensively and firmly formed. It is an object of the present invention to provide a work vehicle that can perform the operation.

  In order to solve the above-described problems, the present invention firstly provides a work vehicle provided with a hood, wherein the hood has a front cover that covers the front of an engine room, and a main cover that covers the upper side and both sides of the engine room. And a cover made of resin, wherein the front cover is formed in a curved shape so as to cover a front side of the hood, and a light support portion to which a headlight is detachably attached and an opening are integrally formed. It includes a main body and a metal plate installed to close the opening of the cover main body and improve the strength, wherein the metal plate has a mesh or a plurality of ventilation holes.

  Secondly, the metal plate is characterized by being formed in a V-shape, a U-shape or a U-shape in plan view.

  Thirdly, a wiring fixing portion for fixing a wiring is provided on a peripheral side of the metal plate.

  The front cover is configured by a cover main body in which a light support portion to which a headlight can be attached and detached and an opening on the front side are formed, and a metal plate having a ventilation hole provided in the opening. Since the cover body made of resin and the main cover to which the cover body is connected can be made simpler, the strength of the hood can be kept high while the manufacturing cost of the entire hood is kept low.

  According to the metal plate, which is bent and formed in a V-shape, a U-shape or a U-shape in a plan view, the opening formed in the cover main body is formed to be large. Also, the strength of the cover body can be kept high.

  According to the metal plate provided with the wiring fixing portion on the peripheral side of the metal plate, it is not necessary to form the wiring fixing portion on the side of the resin cover body, so that the cover body can be easily formed. Become.

It is a side view of the agricultural tractor to which the work vehicle of the present invention is applied. It is the principal part perspective view which showed the closed state of the bonnet. It is the principal part perspective view which showed the open state of the bonnet. (A) and (B) are the front perspective view and the rear perspective view which showed the structure of the bonnet. It is a rear perspective view of a front cover. (A) is a figure which showed the connection structure of the bonnet, (B) is a rear perspective view which showed the structure of the front cover. (A) to (C) are a rear view, a side view, and a bottom view showing the front cover.

  Hereinafter, embodiments of the present invention will be described based on the illustrated example. FIG. 1 is a side view of an agricultural tractor to which the work vehicle of the present invention is applied, and FIGS. 2 and 3 are perspective views of a main part showing an open / close state of a hood. The tractor includes a body frame 3 supported by a pair of left and right front wheels 1, 1 and rear wheels 2, 2, a hood 4 for covering an engine room in which an engine 10 and the like are installed in front of the body frame 3, and a hood 4 And a maneuvering unit 6 that is arranged at the rear of the vehicle and controls the operation by an operator. A traveling machine body 7 is constituted, and a working machine such as a rotary tillage device (shown in the drawing) is provided behind the traveling machine body 7 via a lifting link 8. No) is connected to be able to move up and down.

  The steering unit 6 includes a seat 9 on which an operator sits, a steering handle 11 which is a steering operation tool disposed in front of the seat 9, and a floor which is a floor provided between the seat 9 and the steering handle 11. The system includes a step 12 and auxiliary steps 13 arranged on both left and right sides of the floor step 12 to assist the operator in getting into the control section 6.

  On the rear side of the seat 9, a safety frame 14 bent and formed in an inverted U-shape when viewed from the front is installed, and the safety frame 14 is configured so that the traveling body extends across the rear end of the control unit 6 from side to side. 7 is attached and fixed to the traveling machine body 7 in a state of being bridged from one of the left and right sides to the other side.

  The bonnet 4 is formed so as to cover the front, upper and left and right sides of the engine 10, and is configured to be able to swing up and down around a left and right fulcrum shaft 15 provided on the rear end upper surface of the bonnet 4. , And is supported on the intake cover 16 side of the traveling body 7. The engine room on the front side of the body frame 3 on which the engine 10 is supported is opened and closed by the vertical swing of the hood 4 (see FIGS. 2 to 4).

  In the engine room, in addition to the engine 10 fixed on the body frame 3, a radiator 17, an air cleaner 18, a battery 19, and the like are disposed in front of the engine 10. Is configured to cool the engine 10 and the like by inflow of air from the engine.

  According to this configuration, the forward swinging of the engine room, the front obliquely upward direction, and the left and right sides are simultaneously opened by the upward swing of the hood 4, so that the maintenance of the engine 10 and the like in the engine room can be performed smoothly. . The specific configuration of the hood 4 will be described later.

  Next, the bonnet will be specifically described with reference to FIGS. 4A and 4B are a front perspective view and a rear perspective view showing the configuration of the hood, FIG. 5 is a rear perspective view of the front cover, and FIG. 6A is a connection of the bonnet. FIG. 6B is a rear perspective view showing the configuration of the front cover, and FIGS. 7A to 7C are rear views, side views showing the front cover, and FIGS. It is a bottom view.

  The bonnet 4 has a main cover 21 formed in an inverted U-shape so as to cover the upper side and the left and right sides of the engine 10 in the engine room from the example shown in the figure, and is attached to the front side of the main cover 21. And a front cover 22 that covers a space on the front side of the engine 10.

  The main cover 21 is formed by bending a square plate-shaped iron plate into an inverted U-shape, and has a front end (and a rear end) formed linearly in a side view. A U-shaped support frame 23 is provided at the front end of the main cover 21 so as to protrude forward from the lower end thereof, and the lower end of the front cover 22 is fitted to the support frame 23. It is mounted and supported in such a way as to match.

  Accordingly, the main cover 21 forms a portion other than the curved shape on the front side of the bonnet 4 and the front and rear ends of the main cover 21 have a simple linear shape. And it can be easily molded.

  Further, the main cover 21 has a rib 20 formed to rise inward along a front end peripheral side thereof, an attachment pin 24 provided on the rib 20 side and inserted through the front cover 22 side, and will be described later. A wiring support 26 is provided for supporting a wiring 25 connected to the headlight 20 (see FIGS. 4 to 6 and the like). Incidentally, a reinforcing member extending along the main cover 21 is provided on the rib 20.

  The front cover 22 is attached to the front end side of the main cover 21 and is a resin-made cover body (cover body) which is formed in a dish-like shape so as to cover the front side of the engine room in which the radiator 17 and the like are arranged. The cover body 31 includes an opening 32 formed on the lower front side of the cover body 31 and a punching metal (metal plate) 33 attached to the opening 32.

  The cover body 31 is formed to be curved so as to cover the front, left, right, and upper surfaces of the front side of the main cover 21 in the engine room, and the opening 32 and a headlight provided above the opening 32. A light supporting portion 34 to which the mounting member 20 can be attached and detached, and a mounting portion 36 disposed inside the peripheral edge of the opening portion 32 for mounting and fixing the punching metal 33 are integrally formed. Thereby, the relatively complicated shape of the front portion of the curved bonnet 4 of the bonnet 4 is integrally molded by resin molding, so that the manufacturing cost can be further reduced. Each component of the front cover 22 will be described in detail.

  The opening 32 is formed to be large over the entire front lower side of the front cover 22, and the left and right ends of the opening 32 extend to the left and right sides of the front cover 22. The opening 32 is formed symmetrically in the front view and is formed so as to be recessed rearward in the side view (see FIGS. 7A to 7D).

  The opening 32 extends in a beak shape toward the front lower side in a side view and protrudes forward at the left and right center lower end sides and the left and right center upper end side of the opening 32. The provided lower grip portion 38 and the upper grip portion 39 are formed vertically. Thus, the operator can grip the upper and lower grip portions 38 and 39 at the time of opening and closing the hood.

  According to this configuration, the operator can easily hold one of the lower grip portion 38 and the upper grip portion 39 disposed on the front of the bonnet 4 according to the open / close state of the bonnet 4 (the force is easily applied). 2), the bonnet 3 can be opened and closed while the bonnet 3 can be opened and closed more smoothly and easily.

  Further, by using the lower grip portion 38 and the upper grip portion 39 when the bonnet 4 is opened and closed, it is not necessary to hold the lower end side of the bonnet 4, so that there is no danger of the operator pinching a hand when the bonnet 4 is closed.

  The punching metal 33 is a U-shaped planar metal member that is slightly larger than the opening 32 so as to cover the entire opening 32 formed in the cover body 31. It is formed by bending in a shape. That is, the strength of the resin-made cover body 31 (front cover 22) can be kept high by attaching and fixing the punching metal 33 so as to cover the whole of the opening 32 formed largely on the cover body 31 side. As well as being able to maintain good design.

  More specifically, the punching metal 33 is formed to bend in a V-shape with a shallower center in the left-right direction, and to bend in an R-shape toward the rear so that both left and right sides wrap around the side surface of the opening 32. Thereby, it is formed in a U-shape that covers the opening 32 as a whole. At this time, a vertical fold 33a is formed at the left and right center of the punch metal 33.

  The punching metal 33 has an infinite number of ventilation holes (not shown) formed in its entirety. Therefore, air is introduced into the engine room from the entire opening 32 (the front side of the bonnet 4) where the punching metal 33 is attached. Can be supplied efficiently.

  According to this configuration, since the punching metal 33 is particularly formed by bending so that the center in the left-right direction is pointed in a V-shape, the strength is improved. There is no need to provide a reinforcing member at the central portion of 33 or the like. This allows air to be efficiently supplied into the engine room from the ventilation holes formed in the entire punching metal 33 through the openings 32, so that the cooling efficiency of the engine 10 is greatly improved.

  Further, the punching metal 33 has a positioning insert 41 screwed on the left and right ends on the peripheral side, and a punching metal on the upper and lower ends on the front side on the peripheral side through the mounting holes to the cover body 31 side. Fixing bolts 43 for attaching and fixing 33 are provided (FIGS. 5A and 5B). Hereinafter, the mounting portion 36 formed integrally with the cover body 31 will be described.

  The mounting portion 36 is integrally molded along the peripheral edge of the opening 32 on the inner peripheral surface side of the cover body 31 made of resin, and a slit portion provided near the left and right end sides of the opening 32. 36A and a fixing portion 36B provided near the upper and lower ends of the opening portion 32. The fixing portion 36B press-fits an insert nut (not shown) into a cylindrical portion integrally formed with the cover body 31. It is configured by heat injection.

  The fixing portion 36B is provided between the punching metal 33 and the fixing portion 36 (end portion of the cylindrical portion) while the insert nut is provided slightly inside the end portion side of the cylindrical portion made of resin. By providing the large washer 42, the fixing portion 36 and the punching metal 33 (the washer 42) can be brought into close contact with no gap (see FIG. 6A).

  According to this configuration, when attaching the punching metal 33 from the back (rear) side of the cover body 31 to close the opening 32, the punching metal 33 is provided on the left and right end sides of the punching metal 33 and protrudes left and right outward. By inserting the insert 41 provided so as to be inserted into the slit 36A on the cover body 31 side, the punching metal 33 can be easily positioned at the mounting position (FIGS. 5 and 6 and the like).

  Next, the punching metal 33 positioned at the mounting position can be fixedly fastened to the cover body 31 by tightening the fixing bolt 43 to the fixing portion 36B (insert nut) on the cover body 31 side. it can. As a result, the punching metal 33 is firmly attached and fixed to the cover body 31 without rattling with the opening 32 closed.

  As described above, the front cover 22 is a metal plate formed on the cover body 31 having the opening 32 formed on the front side while being curved to cover the front side of the bonnet 4 by resin molding. By attaching and fixing the punching metal 33, the front cover 22 having good ventilation and high strength can be formed at low cost.

  Incidentally, the punching metal 33 is configured such that a ring-shaped wiring support (wiring fixing portion) 46 for supporting the wiring 25 connected to the headlight 20 described later can be attached and fixed near the fixing bolt 43. (FIGS. 4B and 5). Thus, the wiring 25 can be supported on the punching metal 33 side having high strength, so that the wiring 25 can be stably supported with a simple configuration.

  The light support portion 34 is fitted with the cylindrical headlight 20 above the opening from the rear side of the cover body 31 and only the light portion is exposed on the surface of the front cover 22. A locking hole 47 that can be held and a light fixing portion 48 provided on a peripheral edge of the locking hole 47 for fixing the headlight 20 with a fixing screw or the like are provided. In this example, two (two) headlights 20 can be attached and supported.

  Incidentally, in the illustrated example, the headlights 20 are symmetrically arranged two by two on the right and left sides of the front cover 22 (a total of four), and each headlight 20 is attached to the light fixing portion 48 along the outer periphery. There are provided four fixing screws for screw fixing. Further, the headlights 20 are integrally connected by a wiring 25 to which power is supplied (FIG. 5 and the like).

  A logo support mechanism 49 for detachably supporting a logo (emblem) is provided at the center on the upper side of the opening 32 on the front side of the front cover 22.

  The logo support mechanism 49 includes a logo (not shown), an upper opening 51 integrally formed on the upper side of the opening 32 of the resin cover 21, and a plate-shaped member attached to close the upper opening 51. A logo support plate 52, a support plate fixing portion 55 for attaching and fixing the logo support plate 52 to the upper opening portion 51, and a logo fixing portion 53 for supporting and fixing the logo from the back side of the logo support plate 52. (See FIGS. 5 and 6 etc.).

  The upper opening 51 is a hole formed between the locking holes 47 arranged symmetrically on the cover body 21 side, that is, a hole formed on the left and right center sides of the cover body 21. Is formed.

  The logo support plate 52 is a metal plate-like member formed to be slightly larger than the upper opening portion 51, and has a logo support hole 52a for supporting the logo at the center and the logo support hole at four corners. A fixing bolt 52b for attaching and fixing the plate 52 to the support plate fixing portion 55 on the cover body 21 side is provided. Also, a large number of ventilation holes (not shown) are formed in the logo support plate 52 as in the case of the punching metal 33 (FIGS. 6A and 6B).

  The logo fixing portion 53 is a support for supporting the logo provided on the front side of the logo support plate 52 from the back side of the logo support plate 52. The logo fixing portion 53 also has a ring-shaped wiring support 54 for supporting the wiring 25 connected to the headlights 20 which are arranged side by side and adjacent to each other (FIG. 6B). ). As a result, the headlight 20 attached to the front of the front cover 22 and the logo fixing portion 53 supporting the logo are connected by the wiring 25 connected to each headlight 20, so that the headlight 20 and the logo cover 21 are connected. The mounting work on the side can be performed more smoothly.

  According to this configuration, the logo (emblem) attached and fixed to the front of the front cover 22 can be detachably supported, so that the logo design can be easily changed. Further, since a ventilation hole is formed around the logo on the upper opening 51 side, the flow rate of air flowing into the engine room from the front of the hood 4 is further increased, and the cooling efficiency in the engine room is further improved.

4 Bonnet 20 Headlight 21 Main cover 22 Front cover 31 Cover body (cover body)
32 Opening 34 Light support 33 Punching metal (metal plate)

Claims (3)

In a work vehicle equipped with a hood,
The hood has a front cover that covers the front of the engine room, and a main cover that covers the upper and both sides of the engine room, respectively.
The front cover is formed to be curved so as to cover the front side of the hood, and a resin cover body integrally formed with a light support portion and an opening to which a headlight is detachably attached, and the cover body And a metal plate installed to close the opening and improve the strength,
The work vehicle, wherein the metal plate has a mesh or a plurality of ventilation holes. The work vehicle according to claim 1, wherein the metal plate is formed in a V shape, a U shape, or a U shape in a plan view. The work vehicle according to claim 1, wherein a wiring fixing portion for fixing wiring is provided on a peripheral side of the metal plate.

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