JPH04159179A - Resin made bonnet - Google Patents

Abstract

PURPOSE:To attain light weight and cost reduction without requiring special reinforcing parts by providing a resin made bonnet with side face parts extended laterally downward from an upper face, and forming thick wall parts, continuously laterally across the upper face part and both side face parts, integrally on the inner face of the bonnet. CONSTITUTION:A tractor body is provided with an engine and its auxiliary machinery mounted to its front part covered with a front skirt 2, a steering wheel column cover 3 and a bonnet 10. The bonnet 10 opened downward and backward is provided with an upper face part 11, side face parts 12 extended laterally downward from the upper face part 11, and a front face part 13 extended downward from the front part of the upper face part 11 so as to be continuous with both side face parts 12. In this case, thick wall parts 14 laterally continuously across the upper face part 11 and both side face parts 12 are integrally formed on the inner face of the bonnet 10. Three thick wall parts 14, for instance, are provided being spaced longitudinally in turn from a rear open edge part 10a, and the front and rear parts of each thick wall part 14 are to be continuous with each normal wall thickness part 16 through a gradually thinned taper part 15. The rigidity of the bonnet 10 is thus secured.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a resin bonnet for a vehicle such as a tractor.

[Prior Art] A tractor has been provided with a front hinged bonnet (see Japanese Patent Application Laid-Open No. 1-233119).
Furthermore, a structure in which a stiffener is provided on the inside of the bonnet for reinforcement is also known from Japanese Utility Model Application Publication No. 2-66375.

[Problem to be solved by the invention] By the way, when the bonnet is molded from resin to reduce weight, resin is inferior to metal in terms of rigidity, so
Needs reinforcement.

However, if a special stiffener is provided, it is disadvantageous in terms of cost as well as weight reduction.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a resin bonnet that does not require special reinforcing parts and that maintains rigidity while reducing weight and cost.

[Means for Solving the Problems] In order to solve the above problems, the present invention provides a resin bonnet having side portions extending downward from the left and right sides of the upper surface portion.
It is characterized by integrally forming a thick wall portion that continues in the lateral direction over the top surface portion and both side surface portions.

More specifically, the bonnet is characterized in that it has a front part that extends downward from the front of the top part and is continuous with both side parts, and the left and right sides of this front part and both side parts are respectively connected by hinge members. .

[Function] Since it is a resin bonnet that is integrally formed with a thick wall that continues in the lateral direction across the top surface and both sides, rigidity can be ensured by the thick wall that continues in the lateral direction, eliminating the need for special reinforcing parts. Therefore, it also contributes to weight reduction and cost reduction.

Furthermore, by connecting the left and right sides of the front part and both side faces with the hinge member, the rigidity of the front part of the resin bonnet can be ensured by using the hinge member as a reinforcing member.

[Example] Examples will be described below based on the accompanying drawings.

In FIG. 1 showing a vehicle as an example to which the present invention is applied, 1 is a tractor body, 2 is a front skirt thereof, 3 is a handle column cover, 4 is a handle, 5 is a seat, 6 is a front wheel, 7 is a rear wheel, and 8 is a front skirt. is the cutter deck, 9 is the engine,
10 is a bonnet.

An engine 9 and its auxiliary machinery are mounted on the front part of the tractor body 1, and are covered by a front skirt 2, a handle column cover 3, and a bonnet 10.

The bonnet 10 includes an upper surface portion 11, side surface portions 12.12 extending downward from the left and right sides of the upper surface portion 11, and a front surface portion 13 extending downward from the front of the upper surface portion 11 and continuous with both side surface portions 12.12. It is open downward and rearward, and the rear open edge 10a is integrally molded with resin as described below.

That is, as shown in FIGS. 2 and 3, a bonnet 10 made of resin is integrally formed with a thick interior 14 on its inner surface that extends in the lateral direction over an upper surface 11 and both side surfaces 12 and 12. In the illustrated example, three thick portions 14 are provided sequentially spaced apart from the rear open edge 10a in the front-rear direction. .15 and continues to the normal thick part 16...

In the example, due to RIM molding (material: DCPD), sink marks after molding were made using normal materials (PP, ABS, etc.)
The thick portion 14 is integrally molded by taking advantage of the fact that it is smaller than the total thickness.

Thick wall portion 1 that is continuous in the lateral direction and is integrally formed in this way
4... ensures the rigidity of the resin bonnet 10.

Here, the lower portion of the side surface portion 12 excluding the rear open edge 10a side is a bulged portion 12a that bulges slightly outward.

Also, on the left and right sides of the front part 13, there are headlight storage areas 13a.
is formed, and H is a headlight.

At the lower part of the inner surface of the front part 13, there are left and right boss parts 17.1.
7 are integrally protruded, and boss portions 18.18 are also integrally protruded from the inner front portions of both side portions 12.12, and the boss portions 17.18 are made of metal plates on each of the left and right sides. They are coupled to each other by a hinge member 21.

That is, the hinge member 21 includes a hinge piece 24 at the inner end of a portion 22 extending inward from the longitudinal plate portion 22, a connecting piece 25 extending forward from the extending portion 22, and a connecting piece 25 extending inward from the longitudinal plate portion 22.
It is a press-molded product that has a connecting piece 26 to the outside at the top.

The connecting piece 25 of the hinge member 21 is bolted from below to the boss part 17 on the inner surface of the bonnet front part 13, and the connecting piece 26 is connected to the longitudinal ribs 18a, 18a and the continuous piece 18b on the inner surface of the bonnet side part 12. It is bolted from below to a pair of front and rear boss portions 18.18 having longitudinal ribs 18c.

In this manner, the hinge members 21 and 21 are installed at the left and right corners of the front portion of the resin bonnet 10, respectively, to ensure rigidity.

Here, the hinge pieces 24 of the left and right hinge members 21.21.
A hinge bracket 27 that connects and supports 24 is fixed to the vehicle body side, such as the inner surface of the front surface of the front skirt 2.

Further, a striker 28 is fixed to a boss portion 19.19 protruding from the rear inner surface of the bonnet upper surface portion 11, and 29 is a member for receiving a strike force.

Although the embodiments have been described based on a tractor, it goes without saying that the present invention can be applied to other vehicles as well.

[Effects of the Invention] As described above, according to the present invention, since the thick wall portion continuous in the lateral direction is integrally formed over the upper surface and both side surfaces of the resin bonnet, the rigidity is increased by the thick wall portion continuous in the lateral direction. can be secured, eliminating the need for special reinforcing parts,
It can also contribute to weight reduction and cost reduction.

Furthermore, if the left and right sides of the front part and both side faces are respectively connected by hinge members as described in claim 2, the rigidity of the front part of the resin bonnet can be ensured by using the hinge members as reinforcing members.

[Brief explanation of the drawing]

FIG. 1 is a schematic side view showing a vehicle as an example to which the present invention is applied, FIG. 2 is a cutaway side view of the main part of the front part of the vehicle body including the bonnet, and FIG. 3 is a plan view of the same. 10... Resin bonnet, 11... Upper surface part, 12
,... Side part, 13... Front part, 14... Thick interior,
21. hinge member.

Claims (2)

[Claims] (1) A resin bonnet having a side surface extending downward from the left and right sides of the top surface, characterized in that a thick wall portion that continues in the lateral direction is integrally formed across the top surface and both side surfaces. (2) The bonnet has a front part extending downward from the front of the top part and continuous with both side parts, and the left and right sides of the front part and both side parts are respectively connected by a hinge member. The resin bonnet shown.