JP3353754B2 - Battery-powered industrial vehicles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a battery-type industrial vehicle, and more particularly to a controller of the assembly structure for a vehicle control.

[0002]

2. Description of the Related Art A battery-powered forklift, which is a battery-powered industrial vehicle, includes a traveling system and a cargo handling system controller. The controller may include various sensors, electric elements, and the like for control to improve machine stability. High water resistance is required for the position of the controller. Conventionally, the controller has been disposed inside the counter balance weight, in the space below the battery case located below the seat, or the like.

[0003]

In some cases, a yaw rate sensor is mounted on a controller as a sensor used to ensure safety during turning of a vehicle. The yaw rate sensor is a delicate sensor that is susceptible to vibration, impact, and the like, which makes an erroneous detection when receiving vibration. For this reason, it is necessary to arrange the controller in a place where not only the waterproof resistance is high but also the impact resistance is high. However, in the conventional configuration, since the controller is disposed on the plate material forming the vehicle body frame via the bracket with an elastic sheet such as a rubber sheet sandwiched therebetween, there is a problem that vibrations and impacts are easily propagated. is there.

[0004] The present invention has been made in view of the above problems, and an object of the present invention is to provide a battery-type industrial vehicle that can make it difficult for an impact or vibration during traveling to propagate to electronic components mounted on a controller. Is to do.

[0005]

In order to solve the above-mentioned problems, according to the first aspect of the present invention, a tank for storing a liquid in a storage space defined inside a vehicle body, and vehicle control are performed. A traveling system and a cargo handling system.
In a battery-powered industrial vehicle including a battery serving as a power source , the tank is mounted on the vehicle body frame in the housing space, and the controller is attached to the vehicle body frame in a state in which the controller does not contact members constituting the vehicle body frame. It is supported through the tank against the back
The battery case that houses the battery forms the body frame
Between the front and rear frames
The right side is covered with a side frame.
It is housed in a battery chamber as the housing space,
The battery and the controller are
It is located at the side of the source .

[0006]

[0007] In the invention described in claim 2, wherein the vehicle body side front step portion is recessed, prior Symbol controller at the rear of the step portion, and the side panels covering the vehicle body side portion, the battery case It is arranged in a space that can be created between them.

According to a third aspect of the present invention, in the battery type industrial vehicle according to the second aspect , the vehicle body side portion includes a side frame, and the side panel detachably attached to a position above the side frame. And the controller is located above the side frame.

[0009] In the invention described in claim 4 is the battery-powered industrial vehicle as claimed in any one of claims 1 to 3, wherein the tank is via the elastic member relative to the vehicle frame assembly It is attached. (Operation) According to the first aspect of the invention, vibrations and shocks transmitted from the wheels to the vehicle body frame during traveling are transmitted to the controller through the tank. However, since the tank has a thin hollow shape, it easily absorbs shaking such as vibration. In addition, the natural frequency of the thin-walled hollow tank is different from that of the body frame having a framed structure made of a relatively thick plate.
Therefore, even if vibration or impact is applied to the vehicle body frame during traveling, it is difficult for the impact or the like to propagate to the controller. As a result, it becomes difficult for vibration, impact, and the like to be transmitted to the electronic components mounted on the controller. For example, when the sensor is delicate, which is susceptible to vibration, impact, or the like, problems such as erroneous detection hardly occur.

[0010] During running of the vehicles, the wind flows from the upstream in the traveling direction downstream in the battery chamber partitioned in the interior of the vehicle body frame. This wind passes through the controller located on the side of the battery case so as to hit the controller, thereby improving the cooling effect of the controller.

According to the invention described in claim 2 , according to claim 1,
In addition to the operation of the invention described in (1), a space (space) where a battery case cannot be disposed is formed behind the step portion due to the presence of the step portion recessed on the vehicle body side, and the controller is disposed in this space. Therefore, the controller is efficiently arranged in a limited space. Therefore, the size of the vehicle body frame does not increase in order to secure the accommodation space for the controller.

According to the invention described in claim 3 , according to claim 2,
In addition to the effects of the invention described in (1), the controller is located at a relatively high position, and the waterproof resistance is secured. Further, if the side hood is removed, the controller can be maintained from the side, so that the workability of the maintenance is improved.

According to the invention described in claim 4, claim 1
In addition to the effect of the invention described in any one of the third to third aspects, the elastic member is laid for the purpose of absorbing a mounting error of the tank, but it is also possible to absorb vibration and the like. Therefore, since the controller is mounted on the tank on which the elastic member is laid, it is possible to make it more difficult for the controller to transmit shock, vibration, and the like.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a battery-powered forklift as a battery-powered industrial vehicle embodying the present invention will be described below with reference to FIGS. FIG. 2 is a schematic side view of the vehicle body frame with one side frame removed.

As shown in FIG. 1, the battery-powered forklift 1 according to the present embodiment includes a mast device 4 at a front portion of a vehicle body frame 3 constituting a frame of a vehicle body 2. The mast device 4 has a pair of left and right outer masts 5 and an inner mast 6 mounted inside the mast devices 4 so as to be able to move up and down. Lift bracket 7 inside inner mast 6
Are supported so as to be able to move up and down, and a fork 8 is attached to a front surface of the lift bracket 7. A pair of left and right front pillars 9 are erected at the front of the body frame 3, and a pair of right and left rear pillars 10 are erected at the rear. A head guard 11 is attached to an upper portion of the front pillar 9, and an area surrounded by the head guard 11, the front pillar 9, and the rear pillar 10 is a cab 12.

An instrument panel 13 is attached to the front of the operator's cab 12.
3 has handle 14, forward / reverse lever 15, cargo handling lever 16
And so on. A toe board 17 is attached to the floor of the cab 12 so as to be openable and closable. A seat stand 18 for supporting a seat 18a is provided at a rear portion of the cab 12. The seat stand 18 has a board 19
Are located on substantially the same plane as the toe board 17, and can be opened and closed via a hinge mechanism (not shown).

The vehicle body 2 includes a side frame 20 fixed to the left and right sides of the body frame 3,
Side panel (side hood) 2 mounted on the upper side
1, a fender cover 22 attached to the front of the side frame 20 and the like. On the side where the vehicle body 2 gets on and off (in FIG. 1, on the front side), a step plate 23 that is concavely bent is attached to the front side, and a step portion 24 is formed integrally with the step plate 23. ing. The side panel 21 is detachably attached to the vehicle body frame 3 so as to be located on substantially the same horizontal plane as the side frame 20.

As shown in FIG. 1 to FIG.
The front frame portion 25 which constitutes the front portion has a pair of left and right mudguards 26, a front fender 28, and the like. Also, a rear frame portion 2 constituting a rear portion of the body frame 3
7 includes a rear axle support (see FIG. 2) 29 and the like. As shown in FIGS. 2 and 3, the front frame 25
The side frame 20 is welded between the rear frame 27 and the rear frame 27 so as to cover both left and right sides. A substantially rectangular framed storage space with a bottom defined by the front frame portion 25, the rear frame portion 27, the left and right side frames 20, and the bottom plate 32 is a battery chamber 30, and the battery case 31 is stored in the battery chamber 30. ing. The battery case 31 accommodates the battery 31 a and is disposed on the upper surface of a bottom plate 32 serving as the bottom surface of the vehicle body frame 3.

As shown in FIG. 2 and FIG.
The battery case 31 is arranged in the right side in the vehicle width direction so as not to interfere with the step portion 24 in the vehicle width direction.
A hydraulic oil tank 3 serving as a tank for supplying hydraulic oil to a hydraulic circuit of a cargo handling system (not shown) is provided at a side position (on the near side in FIG. 2) of the step portion 24 with respect to the battery case 31.
3 and a steering controller 34 are arranged. The steering controller 34 controls a steering system such as a power steering motor. In the present embodiment, the steering controller 34 controls the rear axle (not shown) to regulate the swing of a rear axle (not shown) in order to secure the balance of the vehicle body when the vehicle body turns. A damper (not shown) interposed between the vehicle body frame 3 and the vehicle body frame 3 is hydraulically controlled. A yaw rate sensor (not shown) is mounted (built-in) inside the steering controller 34 in a state of being supported via a vibration damping rubber (not shown). Also, a counter balance weight (see FIG. 1) 35
A traveling and cargo handling controller 36 is arranged at a rear portion of the vehicle body 2 facing the vehicle. The traveling and cargo handling controller 36 controls a traveling motor and a cargo handling motor (not shown).

As shown in FIG. 2, the hydraulic oil tank 33 is disposed on the upper surface of the bottom plate 32 via a rubber sheet 37 as an elastic member. As shown in FIGS. 2 to 4, the hydraulic oil tank 33 is attached to the vehicle body frame 3 via bolts (not shown) or the like via brackets 33 a extending in front and rear thereof, and via a rubber sheet 37. It has a floating structure. The rubber sheet 37
While absorbing the error when assembling the hydraulic oil tank 33,
It absorbs vibrations and the like that propagate to the hydraulic oil tank 33.

As shown in FIGS. 2 and 4, the hydraulic oil tank 33 has an upper portion 33b and a lower portion 33c having different heights. The step portion 24 is located above the upper portion 33b, and a controller bracket 38 having a U-shaped cross section is attached to the upper surface of the lower portion 33c. A rubber sheet 39 is interposed between the controller bracket 38 and the hydraulic oil tank 33. Controller bracket 38
A steering controller 34 is mounted on the upper inside of the vehicle. As shown in FIG.
A lid 38a having an L-shaped cross section is detachably provided on the upper part of the steering wheel, and the steering controller 34 is entirely covered except for the lower part by attaching the lid 38a. Side wall portion 38b of controller bracket 38
A rubber sheet 40 is interposed between and the side surface of the steering controller 34.

As shown in FIG. 1, the steering controller 3
Numeral 4 is arranged in a vacant space formed by recessing the step portion. Further, the steering controller 34 is located above the side frame 20 and is disposed between the side panel 21 and the battery case 31.

As shown in FIG. 5, the controller bracket 3 is provided on the side wall 38b of the controller bracket 38.
8 are formed with two ventilation holes 38c communicating the inside and the outside. Further, as shown in FIG. 6, a gap 41 is formed between the side panel 21 and the battery case 31. The gap 41 is a path through which the wind passes when the vehicle travels, and the steering controller 34 is located on the path.

While the vehicle is running, vibrations, impacts, and the like propagate from the wheels 1a to the vehicle body frame 3 according to the condition of the road surface.
Since the hydraulic oil tank 33 has a thin plate shape and a hollow shape, the vibration transmitted from the vehicle body frame 3 is easily absorbed. further,
Since the body frame 3 has a framed structure made of a thick plate material, the natural frequency is different from that of the hydraulic oil tank 33 having a thin hollow structure. Therefore, since it is assembled to the vehicle body frame 3 via the hydraulic oil tank 33, vibrations, impacts, and the like from the vehicle body frame 3 hardly propagate to the steering controller 34. Further, rubber sheets 37 and 39 are provided between the bottom plate 32 and the hydraulic oil tank 33 and between the hydraulic oil tank 33 and the controller bracket 38, respectively.
Is interposed, the effect of absorbing vibration and the like is enhanced by the multiple structure of the rubber sheet, and the vibration resistance of the steering controller 34 is improved. As a result, even if a delicate sensor such as a yaw rate sensor is mounted on the steering controller 34, problems such as erroneous detection hardly occur.

Furthermore, since the controller bracket 38 is located on the path through which the wind flows during traveling, the wind flows in the direction of the arrows shown in FIGS. This wind flows into the inside of the controller bracket 38 through the vent hole 38c of the controller bracket 38, so that the cooling effect of the steering controller 34 is enhanced.

Therefore, in this embodiment, the following effects can be obtained. (1) Since the steering controller 34 is supported by the vehicle body frame 3 via the hydraulic oil tank 33, vibrations and shocks during traveling are difficult to propagate to the steering controller 34, and the steering controller 34 is provided with a yaw rate sensor or the like. Even if a delicate sensor is mounted, occurrence of erroneous detection or the like can be suppressed.

(2) The rubber sheet 3 provided for another purpose of absorbing the assembly error of the hydraulic oil tank 33
By using 7, the vibration absorbing effect can be enhanced without increasing the number of components. Further, since the rubber sheet 39 is also interposed between the hydraulic oil tank 33 and the controller bracket 38, the rubber sheet has a multi-layer structure, and the effect of absorbing vibration can be further enhanced. As a result, it becomes more difficult for vibration and impact to be transmitted to the steering controller 34.

(3) The wind passing through the body frame 3 during traveling passes through the gap 41 and flows into the controller bracket 38 from the vent hole 38c. Therefore, since the wind hits the steering controller 34, the cooling effect of the steering controller 34 can be enhanced.

(4) Since the steering controller 34 is disposed in a space behind the step portion 24, each part including the steering controller 34 can be efficiently stored inside the body frame 3 and the battery case 31 It is possible to avoid an increase in the size of the vehicle body frame 3 even if an arrangement in which the body frame 3 is dropped between the front frame portion 25 and the rear frame portion 27 is adopted. As a result, a problem that the wheelbase of the vehicle body 2 becomes long does not occur, and the small turning performance can be maintained.

(5) The steering controller 34 is located above the side frame 20 and the side panel 2
Since 1 is detachable, workability during maintenance of the steering controller 34 can be improved.

The embodiment is not limited to the above, and may be modified as follows, for example. ○ The battery-powered forklift
However, the present invention is not limited to the configuration in which the battery 31a is positioned between the battery 31a and the rear frame 27. For example, as shown in FIG. 7, a forklift 54 in which a battery 53 is disposed in a battery hood 52 in which a seat 51 is supported, wherein a hydraulic oil tank is provided between a front wheel 56 and a rear wheel 57 below a battery case 55. 33 and a steering controller 34 may be arranged.

The controller is not limited to a steering system. That is, a controller having another function may be mounted on the hydraulic oil tank. The tank is not limited to the hydraulic oil tank 33 that supplies the hydraulic oil to the hydraulic circuit. For example, it may be a member that is separate from the body frame 3 and a hollow tank that stores liquid.

The steering controller 34 and the hydraulic oil tank 33 are not limited to being arranged beside the battery case 31. That is, it may be arranged in a predetermined space formed inside the body frame 3.

○ Bottom plate 32 and hydraulic oil tank 3
The rubber sheet 37 interposed between the three may not be provided. The sensor mounted on the controller is not limited to the yaw rate sensor, but may be another sensor used for controlling the vehicle. Further, the electronic component is not limited to the sensor, and may be any electrical component that is vulnerable to vibration and the like.

The elastic member is not limited to a rubber sheet, but may be any material that can absorb vibration, such as a spring. The arrangement structure of the controller according to the present embodiment is not limited to the battery-powered forklift 1 but may be employed in other industrial vehicles such as an engine-type vehicle.

The technical ideas other than the claims that can be grasped from the embodiment and other examples will be described below together with their effects. (1) according to claim 4, the controller bracket (38) for mounting said controller, resilient member (40) is interposed between said tank. In this case, the elastic member has a multi-layer structure, and the absorbability of vibration and the like is further improved, so that the vibration and the like can be further hardly transmitted to the controller.

(2) In the technical idea (1), a ventilation hole is formed in a side wall of the controller bracket. In this case, since the wind passing through the inside of the vehicle body hits the controller located inside the controller bracket, the cooling effect can be enhanced.

[0038]

As described in detail above, according to the first aspect of the present invention, the controller is supported by the vehicle body frame via the tank, so that vibrations and shocks during traveling of the vehicle are transmitted to the controller. Can be difficult.

[0039] during running of vehicles, wind passing through the after the battery chamber partitioned in the interior of the vehicle body frame from the front so passing around controller, it is possible to enhance the cooling effect of the controller.

According to the invention described in claim 2 , according to claim 1
In addition to the effects of the invention described in (1), since the controller is arranged by utilizing the vacant space formed behind the step portion, parts including the controller can be efficiently arranged.

According to the invention described in claim 3 , according to claim 2
In addition to the effects of the invention described in (1), since the controller is at a relatively high position, waterproof resistance can be ensured, and workability during maintenance of the controller can be improved.

According to the fourth aspect of the present invention, the first aspect is provided.
In addition to the effect of the invention described in any one of the third to third aspects, the elastic member absorbs shocks, vibrations, and the like, so that the vibrations and the like are more difficult to propagate to the controller.

[Brief description of the drawings]

FIG. 1 is a side view of a battery-powered forklift according to an embodiment.

FIG. 2 is a schematic side view of a vehicle body frame.

FIG. 3 is a schematic plan view of a vehicle body frame.

FIG. 4 is a schematic perspective view showing a hydraulic oil tank and a controller bracket.

FIG. 5 is a schematic perspective view showing a side wall of the controller bracket.

FIG. 6 is a perspective view showing a side portion of the vehicle body frame.

FIG. 7 is a side view of another forklift.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Industrial vehicle and battery type forklift as a battery type industrial vehicle 2 ... Body 3 ... Body frame 20
... side frame, 21 ... side panel, 24 ... step part, 25 ... front frame part, 27 ... rear frame part,
Reference numeral 30 denotes a battery chamber as a storage space, 31 a battery case, 31a a battery, 33 a hydraulic oil tank as a tank, 34 a steering controller as a controller, and 37 a rubber sheet as an elastic member.

Claims (4)

(57) [Claims] 1. A storage space partitioned inside a vehicle body,
A battery that is provided with a tank for storing liquid and a controller for controlling the vehicle, and is a power source for a traveling system and a cargo handling system.
In the battery-type industrial vehicle provided with the frame, the tank is mounted on the vehicle body frame in the housing space, and the controller does not contact the members constituting the vehicle body frame, and It is supported through a battery case that accommodates the battery, the vehicle body frame
Between the front and rear frames that make up the system
Then, the left and right sides are partitioned by the side frame
It is housed in the battery chamber as the housing space formed.
The tank and controller are located in the battery compartment.
Battery located at the side of the battery case
Type industrial vehicle. 2. A step portion is recessed in a front portion of a side portion of the vehicle body.
The controller is located behind the step section.
And a side panel covering the side of the vehicle body, and the battery
Claim 1 which is arranged in the space formed between the case
A battery-operated industrial vehicle as described. 3. The vehicle body according to claim 1, wherein the side portion includes a side frame and the support frame.
Said detachably mounted above the id frame
And a side panel, wherein the controller is the side panel.
3. The battery according to claim 2, wherein the battery is located above the frame.
Re-type industrial vehicle. 4. The tank is provided with respect to the body frame.
Claim 1 which is assembled via an elastic member
4. The battery-powered industrial vehicle according to claim 3.