JP5080929B2 - Work vehicle - Google Patents

Description

  The present invention relates to a work vehicle, and more particularly to attachment of hydraulic equipment.

  2. Description of the Related Art Conventionally, a reach forklift that includes a vehicle body having a pair of left and right reach legs extending forward and a lift device that is movable in the front-rear direction along the reach legs is known (for example, Patent Documents). 1). The vehicle body includes a reach cylinder that expands and contracts back and forth with hydraulic oil, and the lift device is moved back and forth with the reach cylinder. The lift device includes a lift cylinder that vertically expands and contracts with hydraulic oil, and a fork claw that moves up and down by the lift cylinder. Inside the vehicle body of such a reach forklift is provided hydraulic equipment such as an oil tank and a control valve for pumping hydraulic oil to each cylinder.

JP 2000-281298 A

  However, in such a reach forklift, there has been a problem that the number of assembly steps is increased because those hydraulic devices are conventionally directly attached to the vehicle body via separate brackets or by bolting. . In addition, when changing the specifications of each hydraulic system equipment, it is necessary to redesign the shape of the bracket for mounting the hydraulic system equipment and the positions of screw holes provided in the vehicle body, etc. There was a problem of being.

  An object of the present invention is to provide a work vehicle that can reduce the number of assembly steps and can easily change the specifications of hydraulic equipment.

The work vehicle according to claim 1 includes a hydraulic work machine, a pair of support columns provided at an end in the vehicle width direction, and a mounting bracket attached so as to connect the support columns. A plurality of hydraulic devices for supplying hydraulic pressure to the working machine are attached to the mounting bracket, and the hydraulic device includes an oil tank and an oil control valve that switches between supply and stop of oil. The mounting bracket includes a U-shaped portion in a plan view opened to the front side by a crank portion bent in a crank shape in a plan view, and a longitudinal portion extending in the vehicle width direction from the U-shaped portion, The oil tank and the oil control valve are attached to the front side of the portion opened to the front side of the mounting bracket, and the longitudinal shape of the bracket is The partial front side of the controller for controlling the electric motor for driving the hydraulic pump is mounted on the back side of the elongated portion, the fan duct air for cooling the controller flows are attached It is characterized by.

The work vehicle according to claim 2 is a work vehicle according to claim 1 , comprising a head guard having a roof portion for protecting the overhead of an operator boarding the driver's seat, and supporting the roof portion. The mounting bracket is attached to the lower end of the support column.

According to the invention of claim 1 , since hydraulic equipment such as an oil tank and a control valve can be attached to the mounting bracket to form a unit, by attaching this unitized thing (mounting bracket) to the support column, Each hydraulic device can be installed in a work vehicle. That is, according to the present invention, each hydraulic system device can be mounted using only one mounting bracket without using a separate bracket, so that the number of assembly steps can be reduced and the manufacturing time can be shortened. be able to. In addition, when changing the specifications of each hydraulic system device, it is only necessary to change the design of the mounting bracket, which makes it easy to change the specifications.

According to the invention of claim 1, in addition, since the mounting bracket includes a crank portion bent in a crank shape in plan view, the strength of the mounting bracket can be improved.

According to the second aspect of the present invention, since the mounting bracket is mounted on the head guard column, the unit can be more unitized and the assemblability can be improved. In addition, since a dedicated member for attaching the mounting bracket to the work vehicle can be eliminated, the number of parts can be reduced.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view showing an entire reach forklift 1 as a work vehicle according to the present embodiment.
As shown in FIG. 1, the reach forklift 1 includes a vehicle body 2 in which a traveling electric motor, a cargo handling electric motor, a hydraulic pump driven by the cargo handling electric motor, and the like are housed. A lift device 3 mounted on the front and driven by pressure oil from the hydraulic pump and a head guard 4 extending upward from the vehicle body 2 and covering the operator's head are provided.

  Among these, the vehicle body 2 is provided with a pair of left and right reach legs 5 extending forward, and along these reach legs 5, a lift device 3 is provided so as to be movable back and forth. Although not shown in the figure, drive wheels are provided at a substantially central position in the left-right direction on the rear side of the vehicle body 2, and assist wheels 6 are provided on the left and right sides of the drive wheels. The drive wheels are driven by a traveling electric motor. Such a vehicle body 2 is provided with a driver seat 7 on which an operator performs a driving operation in a standing posture.

  The lift device 3 includes a pair of masts 8 erected on the left and right sides, a lift bracket 9 that moves up and down along these masts 8, and a lift bracket 9 that is attached to the mast 8 and that drives the lift bracket 9 through a chain And a lift cylinder (not shown). The lift bracket 9 has a pair of left and right fork claws 10 extending forward. The lift device 3 is moved back and forth by a reach cylinder attached to the lower surface of the vehicle body 2 and the fork pawl 10 is tilted back and forth by a tilt cylinder on the lift bracket 9. . The work machine of the present invention includes the reach cylinder, the tilt cylinder, and the lift cylinder.

2 is a perspective view showing the inside of the vehicle body 2 viewed from the front side, and FIG. 3 is a perspective view showing the inside of the vehicle body 2 viewed from the rear side.
The vehicle body 2 includes a side wall 21 provided on the left and right sides, a front and rear partition wall 22 that is joined to each side wall 21 to partition the vehicle body 2 in the front-rear direction, and a front and rear partition wall 22. 2 is provided in front of the front and rear partition walls 22 by being joined to the rear wall 23 formed by a cover provided so as to be openable and closable with respect to the right side wall 21 and the side wall 21 and the front and rear partition walls 22. And an upper and lower partition wall 24 that partitions the vehicle body 2 up and down, a top panel 25 that covers the upper side of these walls 21 to 24, and a front panel 26 that covers the front side of these walls 21 to 24. Yes.

  Inside the vehicle body 2, hydraulic oil to each cylinder is placed in the upper front space S partitioned by the side wall 21, the front and rear partition walls 22, the upper and lower partition walls 24, the top panel 25, and the front panel 26. An oil tank 31 and a control valve 32 are provided as a hydraulic system device 30 related to the pressure feed, and a controller (see FIG. 3) 33 for controlling the electric motor 11 for traveling and the electric motor 11 for cargo handling, And a fan duct (see FIG. 3) 34 that is provided with a cooling fan 341 to cool the controller 33.

  Each of these devices 30, 33, and 34 is attached to a plate-like mounting bracket 50 provided across the side walls 21 along the front surface of the front and rear partition wall 22. More specifically, these devices 30, 33 and 34 are first attached to the mounting bracket 50. The devices 30, 33, 34 are attached to the vehicle body 2 by attaching the unitized mounting bracket 50 to the vehicle body 2, so that the devices 30, 33, 34 are provided in the vehicle body 2. Therefore, in this embodiment, since each apparatus 30,33,34 is attached to the vehicle body 2 using only this one mounting bracket 50 without using a separate bracket, the number of assembling steps can be reduced as compared with the prior art. In addition, the manufacturing time can be shortened. Further, when changing the specifications of these devices 30, 33, 34, it is only necessary to change the design of the mounting bracket 50, and to change the position of the screw holes for mounting the devices 30, 33, 34, etc. Since the design change of the frames (walls 21 to 24) can be made unnecessary, the specification change of each device 30, 33, 34 can be facilitated.

4 is a perspective view showing the mounting bracket 50 viewed from the rear side, and FIG. 5 is a perspective view showing the mounting bracket 50 viewed from the front side.
Such a mounting bracket 50 includes a first member 51 having a U-shape in a plan view that opens to the front side, and a pair of longitudinal members that are joined in the vertical direction on one end side of the first member 51 and extend in the vehicle width direction. A second member 52 and a third member 53 that connects the ends of the second member 52 are provided.

  The first member 51 is a portion arranged along the front surface of the front and rear partition walls 22 (see FIG. 3), a mounting portion 511 to which the oil tank 31 and the control valve 32 are mounted on the front surface portion, and the mounting portion. The first bent portion 512 is bent from one end side to the front side and joined to the second member 52, and the second bent portion 513 is bent from the other end side of the mounting portion 511 to the front side.

  A hole 510 is provided in the mounting portion 511, and a back nut (not shown) is joined to a position corresponding to the hole 510 on the front side thereof. The mounting portion 511 is bolted to the hole 510 and the back nut. (See FIG. 3) 519 is fixed to the front and rear partition walls 22 by insertion. A plurality of device attachment pieces 514 are provided on the front surface of the attachment portion 511, and the oil tank 31 and the control valve 32 are attached to the attachment portion 511 using these device attachment pieces 514.

A pair of adhering portions 515 are formed at the front end of the first bent portion 512 so as to bend in the vehicle width direction and to which the second member 52 is joined. Such a first bent portion 512 forms a crank portion 516 that is bent in a crank shape in plan view at a substantially central portion of the mounting bracket 50. In the present embodiment, the mounting bracket 50 is formed by the crank portion 516. Improvement of the strength is attempted. The bent portion of the crank portion 516 is provided with a rib 517 by press working, and the strength of the mounting bracket 50 is also improved by the rib 517.
A bolt hole 518 is formed at the front end of the second bent portion 513.

  One end side of the second member 52 is joined to the fixing portions 515, and the third member 53 is joined to the other end side of the second member 52. Such a second member 52 is provided with a plurality of holes (see FIG. 5) 520, 521, and back nuts 522, 523 are joined at positions corresponding to the holes 520, 521 on the back side. ing. The controller 33 (see FIG. 3) is attached to the front side of the second member 52 using these holes 520 and the back nut 522, and the second member is used using the holes 521 and the back nut 523. A fan duct 34 (see FIG. 3) is attached to the back side of 52.

Such a second member 52 forms an opening 524 between the first member 51 and the third member 53. From the opening 524, the back surface of the controller 33 is exposed to the inside of the fan duct 34. The controller 33 is sucked by the cooling fan 341 from the exposed portion and cooled by the air flowing in the fan duct 34 (see FIG. 3).
Bolt holes 531 are formed in the third member 53. The mounting bracket 50 is fixed to the lower end of the head guard 4 by bolts 54 inserted through these bolt holes 518 and 531 formed at both ends.

FIG. 6 is a perspective view showing the head guard 4.
The head guard 4 includes a roof portion 41 for protecting the operator's overhead, and a pair of support column portions 42 that support the roof portion 41. Each of the support columns 42 includes a main support plate 43 to which the roof portion 41 is attached, and mounting plates 44 </ b> A and 44 </ b> B that are joined to the inner lower end of the main support plate 43. The attachment plates 44A and 44B are respectively formed with screw holes 45 into which bolts (not shown) for attaching the attachment plates 44A and 44B to the side wall 21 of the vehicle body 2 are screwed.

  Of the mounting plates 44A and 44B, the mounting plate 44A is formed with a bracket mounting piece 46 extending rearward so that the inner surface of the mounting plate 44A is flush with the mounting plate 44A. A bolt hole 47 is formed in the bracket mounting piece 46, and a back nut (not shown) is joined to a position corresponding to the bolt hole 47 on the outer surface thereof. Bolts 54 (see FIG. 4) for fixing one end side of the mounting bracket 50 to the bracket mounting piece 46 are inserted into the bolt holes 47 and the back nuts.

A bracket mounting piece 48 is joined to the rear side surface of the mounting plate 44B. The bracket attachment piece 48 is formed with a screw hole 49 for attaching the other end side of the attachment bracket 50.
In this embodiment, first, the mounting bracket 50 is attached to the head guard 4, and the devices 30, 33, and 34 are attached to the mounting bracket 50. Then, the column portion 42 of the head guard 4 is fixed to the side wall 21, and the mounting bracket 50 is fixed to the front and rear partition walls 22 with bolts (see FIG. 3) 519, so that each device 30, 33, 34 is connected to the vehicle body 2. Install in. Thus, in this embodiment, since it unitizes including the head guard 4, assembly property can be made favorable. Moreover, since the mounting bracket 50 is attached to the vehicle body 2 via the head guard 4, a dedicated member for attaching the mounting bracket 50 to the vehicle body 2 can be eliminated, and the number of parts can be reduced. .

[Modification of Embodiment]
It should be noted that the present invention is not limited to the above-described embodiment, and modifications, improvements, etc. within a scope that can achieve the object of the present invention are included in the present invention.
For example, in the above-described embodiment, the oil tank 31 and the control valve 32 are attached to the mounting bracket 50 as the hydraulic equipment 30, but other equipment may be attached to the mounting bracket 50 .

  The present invention can be suitably used for small work vehicles such as reach forklifts.

1 is a perspective view showing an entire work vehicle according to an embodiment of the present invention. The perspective view which shows the inside of the vehicle body viewed from the front side according to the embodiment. The perspective view which shows the inside of the said vehicle body main body seen from the back side. The perspective view which shows the attachment bracket seen from the back side which concerns on the said embodiment. The perspective view which shows the said mounting bracket seen from the front side. The perspective view which shows the head guard which concerns on the said embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Reach forklift (work vehicle), 4 ... Head guard, 7 ... Driver's seat, 31 ... Oil tank plate, 32 ... Control valve, 33 ... Controller, 30 ... Hydraulic system equipment, 41 ... Roof part, 42 ... Strut part, 50 ... mounting bracket, 516 ... crank part.

Claims (2)

A hydraulic working machine, a pair of support columns provided at the end in the vehicle width direction, and a mounting bracket attached to connect the support columns,
A plurality of hydraulic equipment for supplying hydraulic pressure to the working machine is attached to the mounting bracket ,
The hydraulic system equipment includes an oil tank and an oil control valve that switches between supply and stop of oil,
The mounting bracket includes a U-shaped portion in a plan view opened to the front side by a crank portion bent in a crank shape in a plan view, and a longitudinal portion extending in the vehicle width direction from the U-shaped portion,
The oil tank and the oil control valve are attached to the front side of the portion opened to the front side of the mounting bracket,
A controller for controlling an electric motor that drives a hydraulic pump is attached to the front side of the longitudinal portion of the bracket,
A work vehicle in which a fan duct through which air for cooling the controller flows is attached to the back side of the longitudinal portion . The work vehicle according to claim 1 ,
A head guard having a roof portion for protecting the overhead of an operator boarding the driver's seat;
The work vehicle, wherein the mounting bracket is attached to lower ends of the pair of support columns that support the roof.

Images