JP3381476B2 - Battery forklift frame structure - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a frame structure in a battery forklift, and more specifically,
The frame structure of the battery forklift, which can protect the left and right side panels when mounting the battery in the battery chamber, reduce the thickness of the side panel, and improve the torsional rigidity of the frame. Regarding

[0002]

2. Description of the Related Art As a frame structure in a battery forklift, structures shown in FIGS. 5 and 6 are known. That is, a front plate 5 and a rear plate 7 are erected on the front and rear portions of a bottom plate 3 that constitutes a battery chamber 1 that houses a battery (not shown), and they are integrated by welding. Left and right side panels 9 are arranged on both left and right sides of the front plate 5 and the rear plate 7, and are integrally provided by welding.

Upper and lower portions of the side panel 9 are provided with an upper bent portion 9A and a lower bent portion 9B which are bent inward. Then, the lower bent portion 9B is placed on the rising portion 3U that is bent upward on both left and right sides of the bottom plate 3,
They are integrally connected by welding. The lower bent portion 9
Support plates 11 for supporting the battery are provided at a plurality of locations on the upper surface of B.

In order to reinforce the side panel 9, a reinforcing member 13 is arranged inside the side panel 9. The reinforcing member 13 has an L-shaped cross section, the upper edge of the reinforcing member 13 is in contact with and welded to the lower surface of the upper bent portion 9A of the side panel 9, and the lower edge is the inner surface of the side panel 9. Abutted against and welded. The front and rear ends of the reinforcing member 13 are in contact with the front plate 5 and the rear plate 7 and are integrally joined by welding.

[0005]

In the conventional structure as described above, when the battery is mounted in the battery chamber 1, the battery is brought into contact with the leading edge of the upper bent portion 9A of the side panel 9 so that the leading edge is removed. There is a problem that it is easily deformed. Further, since a closed space is formed between the reinforcing member 13 and the side panel 9, there is a problem that rust-proof coating cannot be applied to the inner surface of this space, and rust is likely to occur in the portion.

Further, in the conventional construction, the lower bent portion 9B of the side panel 9 is in contact with the upper edge of the rising portion 3U of the bottom plate 3, so that the height of the side panel 9 is always constant, There is a problem that it is not possible to cope with a change in the height dimension of the battery.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the conventional problems as described above, and the invention described in claim 1 is provided in front and rear portions of a bottom plate constituting a battery chamber in a battery forklift. In a frame structure in which a front plate and a rear plate are erected and both left and right side portions of the front plate and the rear plate are integrally connected by left and right side panels, the side panel upper part is projected upward from the upper surface of the side panel. This is a battery forklift frame structure in which the left and right side portions of the front plate and the rear plate are integrally connected by the left and right side panel reinforcing members integrated inside.

According to a second aspect of the present invention, in the first aspect of the present invention, the rear end portions of the left and right side panel reinforcing members project rearward from the rear plate to provide rearward projecting portions, and the rearward projecting portions are provided. This is a battery forklift frame structure in which a rear wheel support member is superposed on and integrated with a portion.

The invention according to claim 3 is the invention according to claim 1 or 2.
In the invention described in (1), the front end portions of the left and right side panel reinforcing members project forward from the front plate to provide a forward projecting portion, and the front projecting portion has a front wheel fender member integrally coupled to the battery forklift frame. It is a structure.

According to a fourth aspect of the present invention, in the first, second or third aspect of the present invention, the bottom plate is provided with rising portions which are bent upward and is provided on the outer side surface of the rising portions. Is a frame structure of a battery forklift in which the lower end portions of the side panels are integrally joined.

A fifth aspect of the present invention is the frame structure of the battery forklift according to the fourth aspect, in which battery support portions are projectingly provided on the left and right rising portions of the bottom plate.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION In the following, an embodiment of the present invention will be described with reference to the drawings, in which the same reference numerals are given to the components having the same functions as those of the conventional components described above, and the same components are duplicated. The description is omitted.

Referring to FIGS. 1 to 4, a battery B
(See FIG. 3) A front plate 5 and a rear plate 7 are provided upright on the front and rear portions of a bottom plate 3 that constitutes a battery chamber 1 that accommodates the battery chamber 1 and are integrally provided by welding. Left and right side panels 9 are arranged on the left and right sides of the front plate 5 and the rear plate 7, respectively, and are integrated by welding.

Lower bent portion 9 of the side panel 9
B is in contact with the side surface of the rising portion 3U of the bottom plate 3, and the lower bent portion 9B and the rising portion 3U are integrally formed by welding. In addition, the rising portion 3U of the bottom plate 3
The battery support part 3 supporting the battery B is provided on the upper part of the
B are projected at appropriate intervals.

Drive plates 15 are welded near the left and right sides of the front surface of the front plate 5, and the left and right drive plates 15 are reinforced by welded cross members 17 and are integrally connected. . Further, a front wheel fender member 19 is welded to the outer surface of the drive plate 15, and the rear end portion of the front wheel fender member 19 is also welded to the front surface of the front plate 5.

A base 23 having a steering axle mount bracket 21 on its lower surface is integrally attached to the central portion of the rear surface of the rear plate 7, and a triangular support bracket 25 for supporting the base 23 is welded thereto. is there. Further, rear wheel support members 27 extending rearward are integrally welded to the left and right rear surfaces of the rear plate 7.

Further, left and right supports 29 having a "F" shape are welded to the rear surface of the rear plate 7. The inner edge of the support 29 is welded to the upper surface of the base 23,
The outer edge is welded to the rear wheel support member 27.

In order to reinforce the front plate 5, the rear plate 7 and the side panel 9, the front panel 5 and the rear plate 7 are provided on both left and right sides with front and rear end portions of side panel reinforcing members 31 extending in the front-rear direction. They are joined together by welding.

More specifically, the side panel reinforcing member 31 is made of a plate thicker than the side panel 9, and is provided so as to project upward from the upper bent portion 9A of the side panel 9. Then, the upper bent portion 9A is abutted to the outer surface of the side panel reinforcement member 31, an upper bent portion 9A and the side panel reinforcement member 31 are integrated by welding.

A front end portion of the side panel reinforcing member 31 is formed as a front protruding portion 31F protruding forward from the front plate 5. The front protrusion 31F is engaged with the notch 19N formed in the front wheel fender member 19 and is integrated by welding. A rear end portion of the side panel reinforcing member 31 is formed as a rear protruding portion 31R protruding rearward from the rear plate 7. The inner surface of the rear protrusion 31R is in contact with the outer surface of the rear wheel support member 27 so as to overlap each other, and the rear protrusion 31R and the rear wheel support member 2 are in contact with each other.
7 is integrated by welding.

As described above, in this embodiment, the side panel reinforcing member 31 is provided at a relatively high position so as to project upward from the upper bent portion 9A of the side panel 9, and the side panel reinforcing member 31 is provided. Since the front plate 5 and the rear plate 7 are integrally connected via the side plate 9, when the battery B is housed in the battery chamber 1, the battery B is guided by the side panel reinforcing member 31 and the side panel 9 Since it does not come into direct contact with the side panel 9, the side panel 9 can be formed of a thin plate.

Further, since the relatively high positions of the front plate 5 and the rear plate 7 are integrally connected through the side panel reinforcing member 31, the torsional rigidity can be improved.

Furthermore, the upper bent portion 9A of the side panel 9
Is in contact with the side surface of the side panel reinforcing member 31 and the lower bent portion 9B is in contact with the side surface of the rising portion 3U of the bottom plate 3, so that a closed space is not formed. Etc. can be performed on a full scale.

The side panel reinforcing member 31 corresponds to the height of the battery B housed in the battery chamber 1.
Even if the upper and lower positions of the bottom plate 3 are welded to the front plate 5 and the rear plate 7, the side panel 9 is vertically adjusted to adjust the bottom plate 3.
It suffices to weld it to the rising portion 3U and the side panel reinforcing member 31 in the above, and it is possible to easily cope with the case where the height dimension of the battery B is different.

That is, it is possible to perform welding by adjusting the height positions of the side panel 9 and the side panel reinforcing member 31, and even when there is some dimensional error in the vertical direction during welding, the above The side panel 9 and the side panel reinforcing member 31 can be welded by allowing a dimensional error.

Further, the front end portion of the side panel reinforcing member 31 is projected forward from the front plate 5, and the front projecting portion 31F is engaged with the notch portion 19N of the front wheel fender member 19 and integrally welded. The torsional rigidity is further improved.

Furthermore, the rear end portion of the side panel reinforcing member 31 is projected rearward from the rear plate 7, and the rear protruding portion 31 is formed.
Since the rear wheel support member 27 is joined and welded to the R so as to overlap each other, the rear wheel support member 27 and the side panel reinforcing member 31 linearly and integrally engage with each other, ensuring torsional rigidity and strength. It is easy to do. Further, the left and right rear wheel support members 27 are located at both left and right ends of the rear plate 7, and the space between them is widened, and the space above the base 23 is enlarged, so that, for example, the degree of freedom in the arrangement of the motor, controller, pump, etc. It will grow.

[0028]

As can be understood from the above description, the invention described in claim 1 is such that the front plate and the rear plate are provided upright on the front and rear portions of the bottom plate constituting the battery chamber in the battery forklift, and In the frame structure in which the left and right side portions of the front plate and the rear plate are integrally connected by the left and right side panels, the left and right side panel reinforcements projecting upward from the upper surface of the side panel and integrated inside the upper portion of the side panel Since the left and right sides of the front plate and the rear plate are integrally connected by the member, when the battery is housed in the battery chamber, the side panel reinforcing member guides the battery, and the battery directly contacts the side panel. Since this is not the case, the side panel can be made thinner.

In addition, the relatively high position of the front plate and the rear plate,
Since it is integrally connected by the side panel reinforcing member, it is possible to improve the torsional rigidity.

According to a second aspect of the present invention, in the first aspect of the present invention, the rear end portions of the left and right side panel reinforcing members are provided with rearward projecting portions projecting rearward from the rear plate, and the rearward projecting portions are provided. Since the rear wheel support member is superposed on and integrated with the rear portion, the left and right rear wheel support members can be widened horizontally, and the left and right side panel reinforcing members and the rear wheel support member are linearly integrated. Therefore, the utilization of the upper space of the base welded to the rear surface of the rear plate can be improved and the torsional rigidity can be improved.

The invention according to claim 3 is the invention according to claim 1 or 2.
In the invention described in (1), the front end portions of the left and right side panel reinforcing members are provided with front projections that project in the front direction from the front plate, and since the front projections are integrally joined to the front wheel fender member, It is possible to further improve the torsional rigidity.

According to a fourth aspect of the present invention, in the first, second or third aspect of the present invention, the bottom plate is provided with rising portions bent to the left and right sides, and the left and right sides are provided on the outer surfaces of the rising portions. Since the lower end of the side panel is integrally connected, the vertical position of the side panel can be adjusted for welding, and it is possible to easily cope with different heights of the battery, for example. is there.

According to a fifth aspect of the present invention, in the invention according to the fourth aspect, the battery support portions are provided on the left and right rising portions of the bottom plate so that the configuration of the battery support portion can be simplified. It can be formed.

[Brief description of drawings]

FIG. 1 is a perspective explanatory view of a frame structure according to an exemplary embodiment of the present invention.

FIG. 2 is a perspective explanatory view showing a state in which each constituent member is disassembled.

FIG. 3 is an explanatory cross-sectional view taken along the line III-III in FIG.

FIG. 4 is an explanatory plan view showing a main part.

FIG. 5 is a perspective explanatory view showing a conventional frame structure.

6 is an enlarged sectional view taken along line VI-VI in FIG.

[Explanation of symbols]

1 battery compartment 3 bottom plate 3U rising part 5 front plate 7 Rear plate 9 Side panel 9A Upper bend 9B Lower bend 19 Front wheel fender member 19N notch 27 Rear wheel support member 31 Side panel reinforcement member 31F Front protrusion 31R Rear protrusion

Claims (5)

(57) [Claims] 1. A front plate and a rear plate are erected on front and rear parts of a bottom plate constituting a battery chamber in a battery forklift, and left and right side parts of the front plate and the rear plate are integrally connected by left and right side panels. In the frame structure,
A battery forklift characterized in that left and right side portions of a front plate and a rear plate are integrally connected by means of left and right side panel reinforcing members that project upward from the upper surface of the side panel and are integrated inside the upper portion of the side panel. Frame structure. 2. The invention according to claim 1, wherein the rear end portions of the left and right side panel reinforcing members project rearward from the rear plate to provide rearward projecting portions, and the rear projecting portions are provided with rear wheel supporting members. The frame structure of the battery forklift, which is characterized by overlapping and integrating. 3. The invention according to claim 1 or 2,
A frame structure for a battery forklift characterized in that the front end portions of the left and right side panel reinforcing members project forward from the front plate to provide a front protruding portion, and the front wheel fender member is integrally connected to the front protruding portion. . 4. The invention according to claim 1, 2 or 3, wherein the left and right side portions of the bottom plate are provided with rising portions bent upward, and the lower end portions of the left and right side panels are provided on the outer surfaces of the rising portions. A battery forklift frame structure characterized by being joined together. 5. The frame structure for a battery forklift according to claim 4, wherein battery support portions are provided on left and right rising portions of the bottom plate so as to project therefrom.