WO2014083661A1

WO2014083661A1 - Electrical-component attachment structure for forklift

Info

Publication number: WO2014083661A1
Application number: PCT/JP2012/080961
Authority: WO
Inventors: 明浩石神; 朋之早川
Original assignee: ニチユ三菱フォークリフト株式会社
Priority date: 2012-11-29
Filing date: 2012-11-29
Publication date: 2014-06-05
Also published as: BR112015007296A2; JPWO2014083661A1; EP2927185A4; CN104540770A; JP5943526B2; CN104540770B; BR112015007296B1; EP2927185A1

Abstract

The purpose of the present invention is to provide an electrical-component attachment structure for a forklift whereby electrical components provided around an engine are concentrated in one place, an electrical harness is prevented from coming into contact with the engine, and the electrical components are easy to maintain and inspect. This electrical-component attachment structure for a forklift is characterized by the provision of the following: a left/right pair of side covers (26) that protrude from the top surfaces of a pair of side frames (21) at positions at which said side covers (26) face an engine and various other forklift mechanisms placed between said side frames (21); a front cover (25) that is removably mounted to the side frames (21) and closes off the front-end side of the side covers (26); and an engine hood (24) that covers the top end of an engine compartment (ER) enclosed by the side covers (26) and the front cover (25). This electrical-component attachment structure for a forklift is further characterized in that a plurality of types of electronic components (R) for operating the forklift (1) are attached on the engine-compartment (ER) side of the front cover (25).

Description

Forklift electrical parts mounting structure

The present invention relates to an electrical component mounting structure disposed in an engine room of a forklift.

Forklifts are frequently used to improve the efficiency of transporting and unloading various types of luggage.
As a drive source for the forklift, a method using a battery mounted on the forklift or the power of the internal combustion engine is employed.
When the internal combustion engine is employed, the internal combustion engine itself becomes a high temperature due to the operation of the internal combustion engine, and the surrounding members are heated by the radiant heat dissipated from the internal combustion engine.
Since electrical components for vehicles (including forklifts) are required to have insulation properties, many electrical components have a resin outer shell, and the performance of the electrical components may not be fully demonstrated due to high heat. is there.
Patent 1 is disclosed as an example corresponding to such a high temperature.

According to Patent Document 1, in a battery forklift truck, there is a structure in which a driving motor that drives a driving wheel and a working device and a controller that controls the working motor are mounted via a bracket that is detachably fixed to a counterweight. It is disclosed.
There is a technical disclosure in which a controller is attached to a counterweight having a large amount of heat via a bracket so that heat generated by the controller is dissipated from the counterweight via the bracket.

Further, according to Patent Document 2, the engine hood is attached to a standing plate disposed at the rear of the engine hood via a pair of left and right hinges.
A structure is disclosed in which the engine hood is removed from the vehicle body by shifting the pair of left and right hinges in the axial direction of the rotation axis with respect to the rotation axis of the hinge.
This facilitates the work of forklift maintenance and repair work.

JP 7-172800 A JP-A-10-310386

However, according to Patent Document 1, a concave portion must be provided in the counterweight in order to mount the controller.
The counterweight is for allowing the forklift to travel and be steered so that the rear wheel does not lift around the front wheel of the forklift when a load of the baggage acts on the load lifting device of the forklift.
Therefore, providing a recess in the counterweight requires increasing the outer shape of the counterweight to ensure a suitable weight.
If the outer shape of the counterweight is increased, there is a problem that the turning ability, which is an important function of the forklift, is hindered.
Furthermore, according to Patent Document 2, there is a structure for removing the engine hood from the vehicle body at the time of maintenance and repair work of the forklift, and no technical disclosure for protecting electrical components from the radiant heat of the engine has been made.

The present invention has been made in view of the above-described problems, and concentrates the electrical components arranged around the engine in one place so that the electrical harness does not touch the engine. An object is to provide an electrical component mounting structure for a forklift that facilitates the maintenance and inspection of components.

In order to solve such a problem, the present invention extends in the longitudinal direction of the forklift body and has a pair of left and right side frames spaced in the vehicle width direction,
A pair of left and right side covers erected on an upper surface of the pair of side frames at a position facing the engine and the forklift devices mounted between the pair of side frames;
A front cover that closes the front end in the vehicle longitudinal direction of the side cover in the vehicle width direction, bridges between the pair of left and right side frames, and is detachably attached to the pair of left and right side frames;
An engine hood that covers an upper end of a space surrounded by the side cover and the front cover,
A forklift electrical component mounting structure can be provided, wherein a plurality of types of electrical components for operating the forklift are mounted on the engine side surface of the front cover.

In the present invention, it is preferable that an electrical component board having a plurality of types of electrical components mounted on the engine side surface of the front cover is detachably disposed with a fastening member.

According to this invention, by attaching the electrical component to the front cover that is detachable from the vehicle body, the electrical harness connected to the electrical component is easily assembled, and the electrical harness is easily prevented from contacting or approaching the engine. .
In addition, when electrical components are scattered around the engine, the harness is routed vertically and horizontally around the engine, so the number of clamps that support the electrical harness, the support bracket that fixes the clamp, and the like increase, and the cost increases. It is possible to prevent deterioration of maintainability, miswiring, and obstruction of air circulation around the engine.
Furthermore, since the front cover can be removed from the side frame together with the electrical component board to which a plurality of types of electrical components are attached, the maintenance and inspection of the electrical components is facilitated.

In the present invention, it is preferable that the electrical component board is attached so that a surface on which the plurality of types of electrical components are mounted faces the front cover.

According to this invention, the performance of the electrical component can be maintained and the durability can be improved by protecting the electrical component from the radiant heat of the engine by making the surface on which the electrical component is mounted face the front board side. .

In the present invention, it is preferable that a connector of an electrical harness that operates the electrical component is faced to and directly connected to an electrical terminal provided on the electrical component.

According to this invention, the electrical harness branched from the electrical harness to each electrical component is prevented from swinging due to the vibration of the vehicle and coming into contact with the engine or other components and being damaged.
Further, in order to suppress the swing of the branched electric harness, a clamp for supporting the branched electric harness, a support bracket for fixing the clamp, and the like are not necessary.

In the present invention, it is preferable that the attachment portion of the front cover to the side frame is disposed at a position covered with the engine hood.

According to this invention, since the upper surface of the side frame also serves as a floor surface when the driver works, the safety of the driver's work can be achieved by eliminating the part of the fastening member for attaching the front cover to the side frame. Can be improved.

In the present invention, it is preferable that a clamp bracket for fixing a clamp for supporting the electric harness is disposed on the front cover and / or the electrical component board.

According to this invention, when the front cover is removed from the side frame for maintenance / inspection of the electrical parts, the electrical harness is moved (bent) at the same time by clamping the electrical harness to the front cover. As well as preventing deformation or breakage of the connecting part between the branch and the electric harness, it is easy to see the combination of connections, so it is possible to prevent erroneous connection between the electrical component and the branched electric harness after the parts are replaced, and improve maintainability. be able to.

According to this invention, it is possible to concentrate the electric parts arranged around the engine in one place so that the electric harness does not touch the engine and to facilitate maintenance and inspection of the electric parts. .

1 shows a schematic side view of a forklift in which the present invention is implemented. The front perspective view of the engine hood part of the present invention is shown. The electrical component attachment state figure of the front cover of 1st Embodiment of this invention is shown. The electrical component attachment state figure of the front cover of 2nd Embodiment of this invention is shown. The detailed figure of the single item of the front cover by which this invention is implemented is shown.

Hereinafter, the present invention will be described in detail with reference to embodiments shown in the drawings.
However, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the present invention only to specific examples unless otherwise specifically described. Only.

(First embodiment)
FIG. 1 shows a schematic perspective view of a forklift in which the present invention is implemented.
The forklift 1 includes a vehicle body 2, a luggage lifting device 7 attached to the front of the vehicle body 2, and a cargo lifted by the luggage lifting device 7 that is mounted on the upper portion of the vehicle body 2 and collapses to the driver's seat. A head guard 5 that prevents falling, a front wheel 8 that is a driving wheel for moving the forklift 1, a rear wheel 9 that is a steering wheel of the forklift 1, and a rear wheel 9 that is a steering wheel of the forklift 1. Thus, the weight of the load of the load lifting device 7 prevents the rear wheel 9 from being separated from the road surface, and the counter weight 3 has a weight that allows the rear wheel 9 to strongly contact the road surface, and the handle 4 for steering the rear wheel 9. And a seat 10 on which the driver is seated.
Since the forklift 1 has the rear wheel 9 as a steering wheel, the traveling direction of the vehicle body 2 cannot be changed unless the counterweight 3 strongly contacts the road surface.

The load elevating device 7 includes a fork (claw) 72 having an L-shaped side view for placing a load, a backrest 73 to which the fork 72 is attached, and a mast 71 that supports the backrest 73 so as to be slidable in the vertical direction. A lift chain (not shown) for sliding the backrest 73 in the vertical direction; a tilt cylinder (hydraulic) 76 for adjusting the tip of the fork 72 by tilting the mast 71 and the auxiliary mast 75 inside the mast 71; It has.
Then, the tip of the fork 72 is inclined (adjusted) up and down, the fork 72 is inserted below the load, and the load is placed on the fork 72.
The auxiliary mast 75 slides up and down with respect to the mast 71 by a lift cylinder (hydraulic pressure) (not shown).

2 and 3, the vehicle body 2 of the forklift 1 includes a pair of left and right side frames 21 extending in the front-rear direction of the forklift 1 and spaced in the vehicle width direction, and the pair of left and right side frames 21. A front cross member (not shown) on the front side and a rear cross member (not shown) on the rear side are connected to each other in the vehicle width direction and arranged with an interval in the front-rear direction.
Further, between the pair of left and right side frames 21, a traveling and working device such as an engine (not shown), a front wheel driving device, a hydraulic pump that generates hydraulic pressure as a power source of a hydraulic device, a rear wheel steering device, and the like. It is installed.
Also, covers that cover the upper side of these devices and devices are arranged.
A position facing the engine and the forklift devices, and a pair of left and right side covers 26 detachably erected on the upper surfaces of the pair of side frames 21, and a position where the front end of the side cover 26 in the longitudinal direction of the vehicle body is closed. A front cover 25 that bridges between the pair of left and right side frames 21 and is detachably attached to the pair of left and right side frames, and a space surrounded by the side cover 26 and the front cover 25. And an engine hood 24 that covers the upper end of the engine room ER.

The opening on the vehicle rear side formed by the pair of left and right side covers 26 and the engine hood 24 is configured to be closed by the front end surface of the counterweight 3.
Further, the front side of the front cover 25 covers the upper surface between the pair of left and right side frames 21 with a floor plate 27 on which a driver puts his / her foot for operating the forklift 1.
The engine hood 24 is rotatable rearward of the vehicle body via a hinge (not shown) provided at the boundary between the counterweight 3 and the rear end of the engine hood 24.
Reference numeral 30 denotes a damper device, which is a rotation assist device for rotating the engine hood 24 backward via a hinge.
Further, a hook device 28 for fixing the rearward rotation of the engine hood 24 is disposed at the front end portion of the engine hood 24.

The hook device 28 includes a hook portion 28a fixed to the front cover 25 and a hook lever portion 28b fixed to the engine hood 24 side.
The engaging / disengaging method is such that the engaging lever at the lower end of the hook lever portion 28b is moved downward by rotating the operating lever 28c of the hook lever portion 28b downward about the rotation shaft provided in the hook lever portion 28b. Moving. Since the moved engaging portion is formed to freely rotate in the longitudinal direction of the vehicle, the hook lever portion 28b is operated by operating the engaging portion to the hook portion 28a (manually).
Is again turned upward to complete the engagement between the hook portion 28a and the hook lever portion 28b.

FIG. 5 shows a single product diagram of the front cover 25.
The front cover 25 includes a cover body 25a having a substantially rectangular shape closing the pair of left and right side covers 26, and an upper flange portion 25b obtained by bending the upper edge of the cover body 25a rearward (to the side where the electrical components are mounted). And a side flange portion 25c that is bent rearward from both edges in the vehicle width direction of the cover body 25a to maintain rigidity and tilting of the cover body 25a in the front-rear direction, and a vehicle width direction from the lower edge of the side flange portion 25c. A mounting portion 25d that is bent inward and is placed on the upper surface of the side frame 21 and fastens the front cover 25 to the side frame 21 with bolts 21a that are fastening members is integrally formed.
The upper flange portion 25b maintains the rigidity of the cover body 25a and protects the electrical component R described later.
That is, by bending the upper flange portion 25b toward the side where the electrical components are mounted, even if rainwater enters from the gap with the engine hood 24 in the rain, the flange portion 25b can prevent water from getting wet. .
As shown in FIG. 4, the mounting portion 25 d of the front cover 25 is fastened from above by a bolt 21 a that is a fastening member on the upper surface of the side frame 21.

As shown in FIG. 3, on the rear surface (surface facing the engine) side of the front cover 25, a hydraulic pump that generates hydraulic pressure as a power source for an engine, a device for driving front wheels, a hydraulic device, etc., and a steering device for rear wheels A large number of electrical components R for controlling the operation of the traveling and working devices are mounted.
As shown in FIG. 4, a large number of electrical components R are mounted on the rear surface of the main body 25 a of the front cover 25.
Each electrical component R is provided with an electrical terminal (not shown) for electrical connection.
On the other hand, an electrical harness HG connected to the electrical terminal is routed in the engine room ER.
The electrical harness HG is bundled with wires connected to a plurality of electrical components, and is covered with a tube member having heat resistance and flexibility.
A branch harness HS that is electrically connected to each electrical component R is branched from the electrical harness HG. A coupler HK that is directly connected to the electrical terminal of the electrical component R is disposed at the tip of the branch harness HS.

A clamp 23 for fixing the electric harness HG and a clamp bracket 22a for fixing the clamp 23 to the front cover 25 are fixed to the lower portion of the main body 25a of the front cover 25.
The electrical harness HG is fixed to the front cover 25, and the branch harness HS branched from the electrical harness HG is connected to the electrical terminals of the electrical component R.
Accordingly, the branch harness HS is fixed by both the electric harness HG and the electrical component R, and the branch harness HS can be prevented from being swung by the vibration of the vehicle.
The electrical harness HG and the branch harness HS are fixed in a state of being brought closer to the main body portion 25a side of the front cover 25.
Therefore, even if the forklift 1 travels on a rough road or the like, the electric harness HG and the branch harness HS can be prevented from approaching or coming into contact with the engine and being damaged.

As the order of maintenance / inspection of the electrical component R, the hook device 28 of the front cover 25 is released, and the engine hood 24 is rotated rearward of the vehicle.
Next, the side cover 26 is removed from the side frame 21, the bolt 21a that attaches the front cover 25 to the side frame 21 is removed, and the front cover 25 is tilted forward.
After the maintenance inspection is completed, assembly is carried out in the reverse procedure.
When the front cover 25 is removed from the side frame 21 for maintenance / inspection of the electrical component R, the electric harness HG and the branch harness HS are moved (bent) at the same time by clamping the electric harness HG to the front cover 25. be able to.
Accordingly, the connecting portion between the electrical component R and the branched harness HS branched is prevented from being deformed or damaged.
Moreover, since the connection state of the connection can be seen well, it is possible to prevent erroneous connection between the electrical component and the branched electric harness after the replacement of the component, and to improve maintainability.

(Second Embodiment)
The present embodiment is the same as the first embodiment except that the electrical component board 29 is added to the front cover 25, and thus the description other than the electrical component board 29 is omitted.
Further, the same parts are denoted by the same reference numerals and description thereof is omitted.
In the present embodiment, as shown in FIG. 4, an electrical component board 29 is further added to the engine room ER side of the front cover 25.
The electrical component board 29 is fastened to the main body 25a of the front cover 25 by bolts 21a that are fastening members.
The electrical component board 29 is mounted on the main body 25a with the surface on which a plurality of electrical components R are mounted facing the main body 25a side of the front cover 25.

In the case of this embodiment, since there are many electrical components to be mounted, both the electrical harness HG and the branch harness HS are increased.
Accordingly, a clamp 23a for fixing the electrical harness HG and clamp

brackets

22b and 22c for fixing the clamp 23a to the front cover 25 are fixed to the lower portion of the main body 25a of the front cover 25.
Further, the clamp bracket 22 is fastened together with the electrical component board 29 to the mounting bolt 21a of the electrical component board 29, and the electrical harness HG is fixed to the front cover 25 by the clamp 23a.

By adopting such a structure, the same effect as in the first embodiment can be obtained.
Furthermore, in the present embodiment, the electrical component board 29 is mounted on the main body 25a with the surface on which a plurality of electrical components R are mounted facing the main body 25a side of the front cover 25.
Therefore, the electrical component R has a structure in which the radiant heat of the engine is blocked by the electrical component board 29, and a good effect can be obtained particularly in an electronic control device that is easily affected by heat.

に関する Electrical component mounting structure to be installed in the engine room of a forklift.

DESCRIPTION OF SYMBOLS 1 Forklift 2 Car body 5 Head guard 7 Cargo lifting device 21 Car body frame
22a, 22b, 22c Clamp bracket 23a, Clamp 24 Engine hood 25 Front cover 26 Side cover 27 Floor board 28 Hook device 29 Electrical component board ER Engine room HG Electrical harness HK Coupler HS Branch harness R Electrical component

Claims

A pair of left and right side frames extending in the longitudinal direction of the body of the forklift and spaced in the vehicle width direction;
A pair of left and right side covers erected on an upper surface of the pair of side frames at a position facing the engine and the forklift devices mounted between the pair of side frames;
A front cover that closes the front end in the vehicle longitudinal direction of the side cover in the vehicle width direction, bridges between the pair of left and right side frames, and is detachably attached to the pair of left and right side frames;
An engine hood that covers an upper end of a space surrounded by the side cover and the front cover,
A forklift electrical component mounting structure for mounting a plurality of types of electrical components for operating the forklift on the surface of the front cover on the engine side.
2. The electrical component mounting structure for a forklift according to claim 1, wherein an electrical component board having a plurality of types of electrical components attached thereto is detachably disposed on a surface of the front cover on the engine side by a fastening member.
3. The electrical component mounting structure for a forklift according to claim 2, wherein the electrical component board is mounted such that a surface on which the plurality of types of electrical components are mounted faces the front cover.
The electrical equipment for a forklift according to any one of claims 1 to 3, wherein a connector of an electrical harness for operating the electrical component is faced and directly connected to an electrical terminal provided on the electrical component. Part mounting structure.
5. The electrical component mounting structure for a forklift according to any one of claims 1 to 4, wherein a mounting portion of the front cover to the side frame is disposed at a position covered with the engine hood.
6. The electrical component for a forklift according to claim 1, wherein a clamp bracket for fixing a clamp that supports the electrical harness is disposed on the front cover and / or the electrical component board. Mounting structure.