JP2011207385A - Working vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve such a problem that, when a larger head lamp is arranged on a front upper side of a hood, the area of a cutout part in the front upper side of the hood also becomes large, and protection of a hood part is possibly impaired.SOLUTION: A pair of vehicle body frames 10, 10 are constituted on right and left lower parts of a vehicle body. A hood 20 surrounding an engine to be mounted on the vehicle body frames 10, 10 is formed of an upper hood 20a, right and left side hoods 20b, 20b, and a front grill part. A reinforcing frame 22 which is freely turnably around a spindle part P with respect to the vehicle body frames 10, 10 is provided on front parts of the vehicle body frames. A mating part 20d of the upper hood 20a and the side hoods 20b is supported by the reinforcing frame 22, and the front hood part is supported by the lower part side.

Description

  The present invention relates to a work vehicle, and relates to a bonnet support structure.

  A support stay is fixed to the left and right sides of the front of the engine, and an open / close arm that is fixed to the front end of the bonnet that covers the top of the engine is supported on the support stay so as to be able to rotate up and down. A technique for performing maintenance in the vicinity of an engine is known (for example, see Patent Document 1).

JP 2002-339741 A

  By the way, in the configuration in which the open space is opened and closed while turning up and down with the front lower part of the bonnet covering the upper part of the engine as a fulcrum, as described above, the opening and closing arms are provided to connect the bonnet and the support stay on the vehicle body side. However, the opening / closing arm itself does not have strength but is set to have strength to withstand the support of the bonnet.

  However, in recent years, in order to increase the design value of the light part on the front upper surface, it has become a tendency to arrange a slightly larger light, the area of the hollowed portion on the front surface of the bonnet also becomes large, and the protection of lights is impaired, Alternatively, the reinforcement structure of the bonnet itself remains unremoved and needs to be improved.

The present invention has taken the following technical means in order to solve the above technical problems.
That is, according to the first aspect of the present invention, a pair of vehicle body frames 10 and 10 are formed on the lower left and right sides of the vehicle body 1, and the bonnet 20 surrounding the engine 7 mounted on the vehicle body frames 10 and 10 is replaced with the upper bonnet 20 a It is formed by side bonnets 20b and 20b and a front grille portion 20c, and a reinforcing frame 22 is provided at the front portion of the vehicle body frame 10 so as to be rotatable around the support shaft portion P with respect to the vehicle body frames 10 and 10. The work frame is configured to support the mating portion 20d of the upper bonnet 20a and the side bonnet 20b on the reinforcing frame 22 and support the front grill portion 20c on the lower side.

  If comprised as mentioned above, the reinforcement frame 22 itself which supports the bonnet 20 will be provided with the support shaft part P, and the upper component part can support the back surface of the bonnet 20.

  According to a second aspect of the present invention, in the first aspect, the reinforcing frame 22 is formed by bending the pipe material into an inverted U shape so that the upper pipe portion 22a, the left and right pipe portions 22b, 22b, and the lower support pipe portions 22c, 22c. Of these, the fulcrum bolts 27 and 27 are fastened and fixed to the fulcrum plate 26 connected and fixed to the vehicle body frames 10 and 10 to the lower support pipe parts 22c and 22c, respectively. It is mounted so that it can move. If comprised in this way, distance can be set long in the width direction of the fulcrum plate 26, and the reinforcement frame 22 can be assembled | attached to a vehicle body stably, ie, the spindle part P can be comprised stably.

  According to a third aspect of the present invention, in the first or second aspect, the notches 35 and 35 for mounting the resin covers 33 incorporating the headlamps 29 and 29 are formed on the front left and right of the upper bonnet 20a. The upper left and right curved portions of the reinforcing frame 22 are provided so as to correspond to the notches 35, 35.

  If comprised in this way, the back surface of the resin cover 33 part with comparatively weak intensity | strength can be reinforced and supported.

  In the first aspect of the invention, the reinforcing frame 22 itself that supports the bonnet 20 is provided with the support shaft portion P, and the upper component portion can support the back surface of the bonnet 20. It can be easily configured.

  According to the second aspect of the present invention, in addition to the effect of the first aspect, the reinforcing frame 22 can be stably assembled to the vehicle body by setting the distance in the width direction of the fulcrum plate 26 to be long. Since it can be configured, the movement of the bonnet 20 during the opening / closing operation can be smoothed.

  In addition to the invention described in claim 1 or 2, the invention described in claim 3 can reinforce and support the back surface of the relatively low-strength resin cover 33, and will not be damaged unexpectedly even if an external force is applied unexpectedly. effective.

Overall side view Overall front view Full rear view with some omitted Whole plan with some omitted Partial perspective view (A), perspective view of resin cover (B) Side view showing the open / close state of the bonnet XX sectional view of FIG. 6 (A), a partial enlarged sectional view (B) An enlarged perspective view showing another embodiment Rear view of rear mirror mounting

Embodiments of the present invention will be described with reference to the drawings.
A front axle 3 having a pair of left and right front wheels 2, 2 is swingably supported around a center pivot outside the figure on the lower side of the front part of the body frame 10, 10 provided in parallel to the left and right, and is arranged below the rear part. A pair of left and right rear axle housings 5 extending from the transmission case 4 are supported, and the rear axle housings 5 are respectively provided with rear wheels 6 and 6.

  By driving and rotating the engine shaft 8 of the engine 7 mounted on the front end of the vehicle body 1, the connected main transmission shaft 9 is transmitted to the rear side of the engine shaft 8 and the rear wheels 6 and 6 are driven in conjunction with each other. can do.

The front axle 3, the transmission case 4, the engine 7, and the like are configured to support a pair of left and right frames 10 and 10 that are provided in the lower part of the vehicle body 1 in the longitudinal direction.
A step floor 11 is formed at the front and rear intermediate portions of the vehicle body frames 10, 10, and a seat 12, an operation panel 13, a steering handle 14, various operation levers, and operation pedals are provided on the control portion on the step floor. It has.

The configuration of the bonnet 20 that surrounds the auxiliary equipment such as the engine 7 and the radiator 19 will be described in detail below.
The bonnet 20 includes an upper bonnet portion 20a that covers the upper surface of the engine 7 and the like, side bonnet portions 20b and 20b that cover the left and right side surfaces, and a front grill portion 20c that is mainly made of punching metal and covers the front surface. That is, the upper bonnet portion 20a made of a sheet metal material and the side bonnet portion 20b made of a sheet metal material are integrated by combining the lower edge portion and the upper edge portion with a mating surface 20d, and the punching metal described later of the front grill portion 20c. Is mainly provided at the front edge portion of the side bonnet portion 20b by means of a bolt or the like, and the upper bonnet portion 20a, the side bonnet portion 20b and the front grill portion 20c are integrally attached to the front lower portion of the vehicle body 1. It is the structure which can rotate back and forth about the provided spindle part P center, and can open and close the internal space of the engine 7.

  The reinforcing frame 22 that constitutes the support shaft portion P and supports the front portion of the bonnet 20 will be described. It is made of a pipe material and is bent into a reverse U shape when viewed from the front, and is bent so that the lower left and right sides are opposed to the inner side, thereby forming the upper pipe portion 22a, the left and right pipe portions 22b and 22b, and the lower support pipe portions 22c and 22c. Form.

  Of these, the lower support pipe portions 22c and 22c are detachable through the intermediate frame 24 which is integrated with the front end frame 23 by using the front end frame 23 connected to reinforce the body frames 10 and 10 as a base frame. The fulcrum bolts 27, 27 that are inserted from the inside into the left and right bent portions 26a, 26a of the fulcrum plate 26 that are fastened to the bolts 25, 25 are screwed into the lower support pipe portions 22c, 22c. Note that the fulcrum bolts 27 and 27 side of the reinforcement frame 22 are mounted so as to be rotatable around the support shaft part P with respect to the fulcrum plate 26 which is substantially integrated with the body frames 10 and 10 and serves as a base member. The

  The upper pipe portion 22a of the reinforcing frame 22 and the connecting frame 28 for connecting the left and right pipe portions 22b, 22b to each other are provided with adjustment bolts 30, 31, 31 for attaching the headlamps 29, 29 and adjusting the optical axis. Are connected. The connection frame 28 and the upper pipe portion 22a are connected and reinforced by a vertical frame 32.

  Reinforcing plates 32 and 32 that also serve as seats are fixed to the left and right pipe portions 22b and 22b by welding, respectively, while the mating surfaces 20d of the upper bonnet portion 20a and the side bonnet 20b are vertically stacked and attached and detached with bolts. In addition, the form fixed by welding from a mating surface and extending inward may be provided, and the form which overlaps and fixes to a reinforcement board may be sufficient.

  The bonnet 20 and the reinforcing frame 22 are connected to each other on the lower side as well as on the upper side by the reinforcing plates 32 and 32 and the mating surface 20d. That is, the front grille portion 20c is mainly supported by forming holes in the brackets 34, 34 provided inwardly on the lower side of the front grille portion 20c of the bonnet 22 and inserting the lower support pipe portions 22b, 22b. .

  The reinforcing frame 22 constitutes lower pivot pipe portions 22c and 22c as the rotation fulcrum P, and extends to the upper portion to reinforce the front surface of the bonnet 22, and is also used as a mounting member for the headlamps 29 and 29, etc. Therefore, the number of parts can be reduced, which is convenient for implementation.

  In addition, since it is set as the structure of the reinforcement frame 22 which also serves as the lower spindle pipe part 22c and 22c which comprises the rotation fulcrum P, it can provide integrally with the bonnet 22, and this rotation fulcrum P and the reinforcement frame are provided. The configuration can be simplified as compared with those configured individually.

  Notches 35 and 35 for mounting the headlamps 29 and 29 are formed on the front left and right of the upper bonnet 20a, and the headlamps 29 and 29 are respectively placed on the front portions of the notches 35 and 35. The resin covers 33 and 33 that are opened so as to be irradiated are mounted in a fitting manner. The left and right curved portions of the upper portion of the reinforcing frame 22 correspond to the notches 35 and 35 and the inner periphery of the resin covers 33 and 33. , And so as to surround the outer periphery of the headlamps 29, 29, the vertical details 36 formed between the left and right cutout portions 35, 35 can be reinforced.

Reference numeral 37 denotes a hook for engaging the front end of a bonnet opening rod (not shown) having a base mounted on the engine 7 side.
The front grill portion 20c is configured to be ventilated by detachably connecting a punching metal 39 to an open portion 38 formed on the front side of a bonnet bent in a U shape in plan view so as to form left and right side bonnets 20b and 20b. Has been.

  In the above embodiment, the bonnet 20 is supported by the overlapping structure of the upper left and right reinforcing plates 32 and the mating portion 20d and the connecting structure of the lower support pipe 22c with respect to the reinforcing frame 22. As shown in FIG. 3, the stay 40 having the base welded and fixed to the left and right center portion of the upper pipe portion 22a of the reinforcement frame 22 is connected to the upper bonnet 20a, whereby the vertical structure 36 can be reinforced.

  The reinforcing frame 22 is provided in an upright state during the forward operation of the vehicle body 1 and can have a required strength (or ensure a dimension that provides the required strength), and can be rearward of the vehicle body 1. Together with the safety frame 41, the safety area A at the time of falling can be secured. That is, a base frame 42 having a base connected to the rear rear axle housing 5 of the vehicle body 1 includes a lower frame 41a and an upper frame 41b in which the base end is connected and supported by a horizontal axis pin to the lower frame 41a. The upper frame 41b is provided slightly forwardly to protect the passenger's head, and the safety area A when the vehicle falls is the passenger's safety area when the vehicle body 1 falls. This is a space region formed below the line segment S connecting the upper end of the reinforcing frame 22 and the upper end of the safety frame 41.

  A muffler 45 is provided on one of the upper left and right sides of the engine 7 (right side in the forward direction in the figure), and the tail pipe 46 of the muffler 45 is fixed so that the front side is inclined downward. The mounting angle can be finely adjusted up and down, and is inserted into a hole 47 formed in the punching metal 39 of the grill 20c. The hole 47 is disposed at a position higher than the lower support pipe portion 22 c of the reinforcing frame 22.

  Therefore, when the bonnet 20 rotates about the support shaft P, the hole 47 is retracted forward and downward with respect to the exhaust portion of the tail pipe 46, and when the bonnet 20 is closed, the hole 47 approaches from the front lower side. Since the retracting / approaching operation corresponding to the inclination direction of 46 is performed, the tail pipe 46 hardly interferes with the hole 47 of the punching metal 39 unnecessarily.

  In addition, the exhaust gas ejected from the exhaust part of the tail pipe 46 forms an intermediate slope part of the tail pipe 46 so as to be ejected from the left and right sides where the exhaust part is located toward the left and right center side or the left and right sides. If comprised in this way, when the vehicle body 1 moves forward, it is difficult for the exhaust gas to fall directly on the operator.

  Side covers 51, 51 that extend to the rear of the handle post 50 that supports the operation panel 13 are provided symmetrically in the lower rear part of the side bonnets 20 b, 20 b of the bonnet 20. A rearview mirror 54 is attached to a rearview mirror attachment portion 53 that is fixed to the support structure frame portion of the radiator 52 on the back side of the left and right side covers 51, 51.

  Reference numeral 55 denotes an elevating link of a working machine (for example, a mower (not shown)) attached to the abdomen of the vehicle body 1. In addition, a three-point link mechanism 56 for mounting a work machine (not shown) so as to be movable up and down is provided at the rear of the vehicle body 1. Direction indicators 57 and 57 are provided at the upper and lower intermediate portions of the safety frame 41.

DESCRIPTION OF SYMBOLS 1 Car body 7 Engine 10 Car body frame 20 Bonnet 20a Upper bonnet 20b Side part bonnet 20c Front grille part 22 Reinforcement frame 22a Upper pipe part 22b Left and right pipe part 22c Lower pivot pipe part 26 Support point plate 27 Supporting bolt 29 Headlamp 33 Resin Cover 35 Notch P Support shaft

Claims (3)

  A pair of vehicle body frames (10, 10) are formed on the lower left and right sides of the vehicle body (1), and the bonnet (20) surrounding the engine (7) mounted on the vehicle body frame (10, 10) is connected to the upper bonnet (20a), A left bonnet (20b, 20b) and a front grille (20c) are formed by the left and right bonnets. A reinforcing frame (22) is provided so as to be rotatable around the portion (P), and the reinforcing frame (22) supports the mating portion (20d) of the upper bonnet (20a) and the side bonnet (20b), A work vehicle configured to support the front grill portion (20c) on the lower side.   The reinforcing frame (22) is formed on the upper pipe part (22a), the left and right pipe parts (22b, 22b), and the lower support pipe part (22c, 22c) by bending the pipe material into an inverted U shape. The fulcrum bolts (27, 27) are fastened to the fulcrum plates (26) connected and fixed to the vehicle body frame (10, 10) to the lower support pipe parts (22c, 22c), respectively. 2. The work vehicle according to claim 1, which is mounted so as to be rotatable around.   Cutout portions (35, 35) for mounting resin covers (33) incorporating headlamps (29, 29) are formed on the front left and right of the upper bonnet (20a), and the reinforcing frame (22) The work vehicle according to claim 1 or 2, wherein upper and left and right curved portions are provided so as to correspond to the notches (35, 35).

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