JP2018095186A - Tractor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase strength of a lateral face part of a resin engine hood to suppress deformation thereof after molding the resin.SOLUTION: A tractor includes a resin engine hood 7 for covering at least an upper side and right and left sides of an engine room 6 that is configured in a front part of a machine body, and opened on at least the lower side and the back side thereof. The engine hood 7 includes: an upper face part 7b for covering the upper side of the engine room 6; and right and left lateral face parts 7c for covering the right and left sides of the engine room 6. The lateral face parts 7c are formed with a recess part 7i along a longitudinal direction.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a tractor including a resin bonnet that covers an engine room.

  A tractor is known that includes a bonnet made of resin (for example, FRP) that covers at least the upper and left and right sides of an engine room that is configured in the front of the machine body, and that is open at least at the lower and rear sides (for example, Patent Document 1). reference).

JP 2007-76537 A

  However, as shown in FIG. 7, this type of bonnet 100 has a cross-sectional shape in a C-C cross-sectional view, so that the lower end side of the left and right side surface portions 101 can easily open outward due to deformation after resin molding. There was a possibility that the shape of this could not be maintained.

The present invention has been created in view of the above circumstances and has been created for the purpose of solving these problems, and the invention of claim 1 is directed to at least the upper and left and right sides of the engine room configured in the front part of the fuselage. A tractor including a resin bonnet that opens at least downward and rearward, and the bonnet includes an upper surface portion that covers the upper side of the engine room, and left and right side surfaces that cover the left and right sides of the engine room. A concave portion along the front-rear direction is formed on the side surface portion.
Moreover, invention of Claim 2 is the tractor of Claim 1, Comprising: On the front end side of the said side part, the upper side convex part along the front-back direction, the said recessed part along the front-back direction, and the front-back direction The lower convex part along is formed so that it may be parallel in the up-and-down direction.
Moreover, invention of Claim 3 is the tractor of Claim 1 or 2, Comprising: The said bonnet is the upper side connection part which connects the front-end part upper sides of the said side parts of right and left, and the front-end part of the said upper surface part. A lower connecting portion that connects lower sides of the front end portions of the left and right side portions, a headlight is provided in the upper connecting portion, and cooling air is provided between the upper connecting portion and the lower connecting portion. A suction port is formed.
Moreover, invention of Claim 4 is a tractor as described in any one of Claims 1-3, Comprising: The said side part has a notch part for arrange | positioning a side cover in a rear lower part, The vertical width of the recess formed on the front side of the notch is larger than the vertical width of the recess formed on the upper side of the notch.

According to the first aspect of the present invention, since the concave portion along the front-rear direction is formed in the side surface portion of the bonnet, the strength of the side surface portion can be improved and deformation after resin molding can be suppressed. In addition, since the concave portion forms a convex portion along the front-rear direction in the engine room, the flow of engine cooling air sucked into the engine room is promoted, and the cooling efficiency of the engine can be improved.
According to the invention of claim 2, at least the front end side of the side surface portion has an upper convex portion along the front-rear direction, a concave portion along the front-rear direction, and a lower convex portion along the front-rear direction in the vertical direction. Since it forms so that it may parallel, the intensity | strength of the front-end side of a side part can be improved.
Further, according to the present invention of claim 3, since the front side of the bonnet is firmly constituted by the upper connecting portion and the lower connecting portion, not only can the deformation in the opening direction of the left and right side portions be suppressed more reliably, A headlight mounting portion and a cooling air suction port can be configured using the upper connection portion and the lower connection portion.
According to the fourth aspect of the present invention, the side surface portion of the bonnet has a notch portion for disposing the side cover at the rear lower portion, and the vertical width of the recess formed on the front side of the notch portion Is larger than the vertical width of the recess formed on the upper side of the notch, so the strength is increased by increasing the vertical width of the recess on the front side of the side part that has a large vertical dimension and is easily deformed in the spreading direction. On the other hand, on the rear side of the side portion where engine cooling air is desired to be efficiently discharged, the protrusion area of the recess into the engine room can be suppressed by reducing the vertical width of the recess.

It is a side view of a tractor concerning an embodiment of the present invention. It is a perspective view which shows the body front part of the tractor which concerns on embodiment of this invention. It is AA sectional drawing of FIG. It is a perspective view which shows the engine room of the tractor which concerns on embodiment of this invention. It is a perspective view which shows the bonnet of the tractor which concerns on embodiment of this invention. It is a figure which shows the bonnet of the tractor which concerns on embodiment of this invention, (a) is a top view of a bonnet, (b) is a front view of a bonnet, (c) is a side view of a bonnet, (d) is B of a bonnet It is -B sectional drawing. It is a figure which shows the bonnet of the tractor which concerns on a prior art example, (a) is a schematic side view of a bonnet, (b) is CC sectional drawing of a bonnet.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In FIG. 1, reference numeral 1 denotes a traveling machine body of a crawler tractor T. The traveling machine body 1 is provided at the front part of the machine body, and an engine mounting unit 2 on which an engine E (see FIGS. 3 and 4) is mounted; Provided in the middle part, a driving part 3 on which an operator gets on, a work machine connection part 4 provided at the rear part of the machine body to which various work machines (not shown) can be connected, and a crawler type provided at the lower part of the machine body And a traveling unit 5.

  As shown in FIGS. 1 to 4, the engine mounting portion 2 includes an engine room 6 that houses the engine E, and is made of a resin that covers the upper, front, and left and right sides of the engine room 6 so as to be freely opened and closed ( For example, a hood 7 of FRP) and left and right side covers 8 covering the rear left and right sides of the engine room 6 are provided.

  A cooling fan 9 is provided on the front surface of the engine E, and the engine is cooled in the engine room 6 through a suction port 7a formed on the front surface of the bonnet 7 from the front of the body according to the rotational driving of the cooling fan 9. Wind is introduced. The introduced engine cooling air passes through the radiator 10 installed in front of the engine E, thereby cooling the engine cooling water flowing through the radiator 10 and passing through the periphery of the engine E below the engine room 6. And is discharged out of the machine from an outlet 8a formed in the side cover 8.

  As shown in FIGS. 5 and 6, the bonnet 7 includes an upper surface portion 7 b that covers the upper side of the engine room 6, left and right side surface portions 7 c that cover the left and right sides of the engine room 6, and front end portions of the left and right side surface portions 7 c. The upper connection part 7d which connects upper sides and the front-end part of the upper surface part 7b, and the lower connection part 7e which connects the front-end part lower side of the right-and-left side part 7c are provided, and the headlight 11 is provided in the upper connection part 7d. An engine cooling air inlet 7a is formed between the upper connecting portion 7d and the lower connecting portion 7e.

  The upper connecting portion 7d includes left and right headlight attachment portions 7f to which the headlight 11 is attached, and left and right eaves portions 7g that are provided above the headlight attachment portions 7f and extend forward from the headlight 11. And a recess 7h formed between the left and right headlight mounting portions 7f.

  The eaves portion 7g is a sun visor that not only prevents rainwater on the bonnet 7 from directly flowing down to the headlight 11 or burying the headlight 11 due to snow but also preventing direct sunlight from hitting the headlight 11. Also works. Further, the left and right eaves portions 7g are inclined toward the left and right center side of the airframe when viewed from the front, and are connected to the recess 7h. Thereby, the rain water on the eaves part 7g can be guided to the concave part 7h and discharged to the front of the bonnet 7 through the left and right headlight mounting parts 7f.

  The suction port 7a is covered with a screen member 12 such as a punching screen having air permeability. The screen member 12 covers the suction port 7a in a forward tilt posture in which the upper side is positioned forward than the lower side. In this way, compared with the case where the screen member 12 is tilted backward, it is possible to suppress intrusion of rainwater, dirt, etc. from the screen member 12 and snow accumulation on the screen member 12.

  The left and right side surface portions 7c of the bonnet 7 are formed with recesses 7i along the front-rear direction. The recessed part 7i can suppress the deformation | transformation of the opening direction of the bonnet 7 after resin molding by improving the intensity | strength of the side part 7c of the bonnet 7. FIG. Moreover, since the recessed part 7i forms the convex part along the front-back direction in the engine room 6, the flow of the engine cooling air suck | inhaled in the engine room 6 is promoted, and the cooling efficiency of the engine E can also be improved.

  Further, when the concave portion 7i is formed in the side surface portion 7c of the bonnet 7 along the front-rear direction, the upper side convex portion 7j along the front-rear direction is formed on the upper side of the concave portion 7i in the side surface portion 7c with reference to the bottom surface of the concave portion 7i. The lower convex part 7k along the front-rear direction is formed below the concave part 7i in the side part 7c. At least at the front end side of the side surface portion 7c, the upper convex portion 7j along the front-rear direction, the concave portion 7i along the front-rear direction, and the lower convex portion 7k along the front-rear direction are formed so as to be parallel in the vertical direction. Therefore, not only can the strength of the front end side of the side surface portion 7c be improved, but the vertical width of the upper connecting portion 7d and the lower connecting portion 7e is accordingly reduced, and the opening area of the suction port 7a is increased. It becomes possible.

  Moreover, the side part 7c of the bonnet 7 has the notch part 7m for arrange | positioning the side cover 8 mentioned above in the rear lower part. And as for the recessed part 7i, the vertical width in the front side of the notch part 7m is larger than the vertical width in the upper side of the notch part 7m. As a result, on the front side of the side surface portion 7c that has a large vertical dimension and is easily deformed in the spreading direction, the strength can be increased by increasing the vertical width of the concave portion 7i, while the rear side surface portion 7c that efficiently discharges the engine cooling air can be achieved. On the side, the protrusion area of the recess 7 i into the engine room 6 can be suppressed by reducing the vertical width of the recess 7 i.

  According to the crawler tractor T of the present embodiment configured as described above, the side surface portion 7c of the bonnet 7 is formed with the concave portion 7i along the front-rear direction, so that the strength of the side surface portion 7c is improved and the resin molding is performed. Later deformation can be suppressed. In addition, since the concave portion 7i forms a convex portion along the front-rear direction in the engine room 6, the flow of engine cooling air sucked into the engine room 6 can be promoted, and the cooling efficiency of the engine E can be enhanced.

  Further, since the front side of the bonnet 7 is firmly constituted by the upper connecting portion 7d and the lower connecting portion 7e, not only can the deformation in the opening direction of the left and right side surface portions 7c be suppressed more reliably, but also the upper connecting portion 7d. And the attachment part of the headlight 11 and the inlet 7a of cooling air can be comprised using the lower side connection part 7e.

  Further, at least on the front end side of the side surface portion 7c, an upper convex portion 7j along the front-rear direction, a concave portion 7i along the front-rear direction, and a lower convex portion 7k along the front-rear direction are formed so as to be parallel in the vertical direction. Therefore, not only can the strength of the front end side of the side surface portion 7c be improved, but the vertical width of the upper connecting portion 7d and the lower connecting portion 7e can be reduced accordingly, and the suction port 7a The opening area can be increased.

  Further, the side surface portion 7c of the bonnet 7 has a notch portion 7m for disposing the side cover 8 at the rear lower portion, and the vertical width of the recess 7i formed on the front side of the notch portion 7m is notched. Since the vertical width of the concave portion 7i formed on the upper side of the portion 7m is larger than that of the side surface portion 7c, which has a large vertical dimension and is easy to deform in the spreading direction, the strength is increased by increasing the vertical width of the concave portion 7i. On the other hand, on the rear side of the side portion 7c where engine cooling air is desired to be discharged efficiently, the projecting area of the recess 7i into the engine room 6 can be suppressed by reducing the vertical width of the recess 7i.

DESCRIPTION OF SYMBOLS 1 Traveling machine body 2 Engine mounting part 6 Engine room 7 Bonnet 7a Suction port 7b Upper surface part 7c Side surface part 7d Upper side connection part 7e Lower side connection part 7f Headlight attaching part 7g Eave part 7i Recessed part 7j Upper side convex part 7k Lower side convex part 7m Notch 8 Side cover 11 Headlight 12 Screen member

Claims (4)

A tractor including a resin bonnet that covers at least the upper and left and right sides of the engine room configured at the front of the airframe, and at least opened at the lower and rear sides,
The bonnet is
An upper surface part covering the upper part of the engine room;
Left and right side portions covering the left and right sides of the engine room,
The tractor according to claim 1, wherein a concave portion along the front-rear direction is formed on the side surface portion.   At least the front end side of the side surface portion is formed so that the upper convex portion along the front-rear direction, the concave portion along the front-rear direction, and the lower convex portion along the front-rear direction are arranged in parallel in the vertical direction. The tractor according to claim 1. The bonnet is
Upper connection parts that connect the front end part upper sides of the left and right side parts and the front end part of the upper surface part;
A lower connecting portion that connects the lower sides of the front end portions of the left and right side portions, and
A headlight is provided in the upper connection part,
The tractor according to claim 1, wherein an inlet for cooling air is formed between the upper connecting portion and the lower connecting portion.   The side surface portion has a notch portion for disposing a side cover at a lower portion on the rear side, and the vertical width of the concave portion formed on the front side of the notch portion is formed on the upper side of the notch portion. The tractor according to any one of claims 1 to 3, wherein the tractor is larger than a vertical width of the recessed portion.

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