JP5872945B2 - forklift - Google Patents

Description

  The present invention relates to a forklift.

  In general, reach-type forklifts, counterbalance-type forklifts (hereinafter referred to as “forklifts”), and the like are known as vehicles used for carrying luggage. Furthermore, it is also known that forklifts use engine-type forklifts that use an internal combustion engine as a power source and battery-type forklifts that use an electric motor as a power source.

  In recent years, the ratio of battery-type forklifts using an electric motor driven by electric power supplied from a battery mounted on a vehicle body of the forklift as a power source is increasing. To lower the center of gravity of this battery-powered forklift and ensure stability, a battery that is larger and heavier than other equipment is placed near the bottom of the vehicle body between the front and rear wheels. The arrangement method has been proposed so far (see, for example, Patent Documents 1 and 2).

  As described above, when the battery is placed at a position between the front wheel and the rear wheel in the vehicle main body and dropped to the bottom surface of the frame of the vehicle main body, it is used for other equipment mounted on the forklift, such as cargo handling and steering. There has been a problem that the arrangement space of the hydraulic equipment and the controller for controlling them is limited by the battery.

As a method for solving this problem, a configuration in which a part of the other devices described above is arranged in a space below the floor in front of the battery and the remaining devices are arranged separately in the space behind the battery can be considered.
In addition, Patent Document 1 proposes a configuration in which the other devices described above are disposed in a space below the floor in front of the battery by reducing the arrangement of hydraulic devices, controllers, and the like. In Patent Document 2, a configuration in which an oil tank or the like is arranged in a space inside the step protruding left and right of the vehicle main body, which is a space different from the space under the floor in front of the battery, to widen the arrangement space of these devices. Has been proposed.

Japanese Patent Laid-Open No. 2001-130885 JP 2005-350197 A

  As described above, when a part of another device (for example, a hydraulic motor) is arranged in the space below the floor in front of the battery and the remaining device (for example, an oil tank) is divided and arranged in the space behind the battery, the battery is sandwiched. Since the hydraulic motor and the oil tank are connected with each other, the hydraulic piping becomes long. As the hydraulic piping becomes longer in this way, the pressure loss in the piping increases. Therefore, the hydraulic motor has to supply a higher pressure hydraulic pressure in order to perform a desired cargo handling operation. In other words, it is necessary to generate excess hydraulic pressure, and there is a problem that energy loss increases.

  In general, an oil tank stores an amount of oil necessary for the operation of a hydraulic device, and therefore needs to have a tank volume greater than a specified value. However, if other devices are compactly arranged in the space below the floor in front of the battery as in Patent Document 1, the space where the oil tank is arranged also becomes small, and it is difficult to secure the space necessary for the arrangement of the oil tank. Become. That is, there is a problem that it is difficult to secure the required volume of the oil tank.

  In Patent Document 2, since the oil tank is disposed in the space inside the step that protrudes to the left and right of the vehicle body, which is a space different from the space under the floor, the arrangement of the oil tank is compared with Patent Document 1. It becomes easy to secure the necessary space. However, if a space for the oil tank is secured inside the step, the position of the step upper surface tends to be high. Since the step is located in the path when the operator of the forklift moves up and down to the forklift, if the position of the upper surface of the step is made too high, the operator will hinder the raising and lowering of the operator. Conversely, if the position of the upper surface of the step is set to a height that does not interfere with the operator's ascending and descending, it will be difficult to secure a space of the size necessary for oil tank placement inside the step, in other words, the required volume of the oil tank will be reduced. There was a problem that it was difficult to secure.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a forklift that can easily secure an arrangement space of a tank and can improve energy saving performance.

In order to achieve the above object, the present invention provides the following means.
The forklift according to the present invention includes a tank that stores liquid therein, a delivery unit that delivers the liquid guided from the tank, at least the tank, and a vehicle main body that houses the delivery unit in an internal space, and the vehicle A battery that is housed between a front wheel and a rear wheel in the internal space of the main body, and that supplies power used at the time of sending out the liquid from at least the delivery section; and is disposed in a front central region of the battery in the internal space, and at least A controller for controlling the operation of the delivery section, wherein the delivery section is a front area of the controller and is disposed in front of the tank in the vehicle main body and sucks the liquid The tank includes a protrusion protruding forward from the tank body, and the suction from the protrusion. To a supply unit pipe for supplying the liquid is connected, is provided, wherein the said tank is disposed on a side region of the controller, the vehicle viewed from the lateral direction of the body, the tank and the controller overlaps It is arranged .
In the above invention, it is preferable that the protruding portion of the tank protrudes forward from the controller.

  According to the forklift of the present invention, the projecting portion extending from the tank main body toward the suction portion of the delivery portion is provided, and the delivery portion is provided with a supply portion to which a pipe for supplying liquid to the delivery portion is connected. The piping for sending the liquid to the part can be shortened, and the loss when sending the liquid from the tank to the sending part can be reduced.

  Further, by providing the tank body with the projecting portion, the tank body and the delivery portion can be arranged apart from each other without increasing the above-mentioned loss as compared with the case where the projecting portion is not provided. Therefore, even if it is not possible to secure a sufficient space for arranging the tank in the vicinity of the sending part, a tank having a necessary volume is arranged at a position away from the sending part by securing a space for providing the protruding part. can do.

The liquid stored in the tank may be oil used for handling and steering a forklift, or may be supplementary water for a battery mounted on a battery-type forklift, or fuel for an engine-type forklift. There is no particular limitation on the application and type.
As described above, the battery is disposed between the front wheel and the rear wheel in the internal space of the vehicle main body, and the controller is disposed at the front center of the battery, so that the center of gravity of the forklift can be lowered and the stabilization can be achieved.
Further, by arranging the sending part in the front area of the controller in the internal space and arranging the tank in the side area of the controller, compared with the case where both the sending part and the tank are arranged in the front area of the controller, the vehicle It is easy to shorten the length in the front-rear direction of the internal space that houses the delivery section in the main body. Furthermore, by arranging the tank in the side area of the controller, which is the remaining space after arranging the battery and the controller in the internal space, the required volume is reduced compared to the case where the tank is arranged in the front area of the controller. It is easy to secure a space for arranging the tank having the same.

  In the above invention, the vehicle body is provided with a step portion that protrudes in the left-right direction, the position of the upper surface is lowered stepwise from the vehicle body, and communicates with the internal space of the vehicle body. An upper end protrusion that is disposed inside the vehicle main body and has an upper end protruding above the upper surface of the step portion and an overhang portion that extends toward the internal space of the step portion are provided. preferable.

  As described above, the upper end protrusion of the tank main body arranged inside the vehicle main body protrudes above the upper surface of the step portion, and the tank main body is provided with an overhanging portion extending inside the step portion. It becomes easy to secure the volume.

  In the above invention, the delivery unit is provided with a pump unit that sucks and delivers the liquid and a motor unit that drives the pump unit, and the pump unit and the motor unit are arranged in the left-right direction of the vehicle body. It is preferable that the pump unit is arranged on the tank side.

  In this way, by arranging the delivery part so that the pump part is on the tank side and the pump part and the motor part are aligned in the left-right direction of the vehicle body, the liquid part is liquid compared with the case where the delivery part is arranged in another posture. Can be shortened from the protruding part of the tank to the suction part of the delivery part. In addition, compared to the case where the pump unit and the motor unit are arranged side by side in the front-rear direction of the vehicle body, the length in the front-rear direction of the internal space that houses the delivery unit and the like in the vehicle body can be easily shortened.

  In the above invention, the delivery part is provided with a pump part that sucks and delivers the liquid, and a motor part that drives the pump part, and the pump part and the motor part are arranged in a vertical direction in the vehicle body. It is preferable that the pump unit is arranged below the motor unit.

  In this way, the pump part is located below the motor part, and the delivery part is arranged so that the pump part and the motor part are aligned in the vertical direction of the vehicle body, so that the liquid flowing through the pump part enters the motor part. Can be prevented. In other words, it is possible to prevent the motor unit from being damaged by the liquid. In addition, it is easy to shorten the length in the front-rear direction of the internal space that houses the delivery unit and the like in the vehicle body as compared with the case where the pump unit and the motor unit are arranged horizontally in the front-rear direction of the vehicle body.

  Note that the pump unit and the motor unit may be arranged side by side in the vertical vertical direction, or may be arranged side by side in an oblique vertical direction. In the case where they are arranged side by side in an oblique vertical direction, an example can be given in which the pump part is arranged in the lower front side and the motor part is arranged in the upper rear side.

  In the above invention, the delivery part is provided with a pump part that sucks and delivers the liquid, and a motor part that drives the pump part, and the pump part and the motor part are arranged in a vertical direction in the vehicle body. It is preferable that the pump unit is arranged above the motor unit.

  Thus, by arranging the pump unit on the upper side of the motor unit and arranging the delivery unit so that the pump unit and the motor unit are aligned in the vertical direction of the vehicle main body, from the supply unit of the tank to the suction unit of the pump unit The distance can be shortened. Therefore, the loss at the time of sending a liquid from a tank to a pump part can be reduced, and energy-saving improvement can be aimed at.

  In the above invention, it is preferable that an opening through which a filter for removing foreign substances contained in the liquid sent to the delivery unit passes is provided on the upper surface of the tank main body and the protruding portion of the tank.

  Thus, by providing the tank main body and the opening on the upper surface of the projecting portion through the filter, the filter can be easily put in and out, so that the filter disposed in the tank can be easily replaced and inspected.

  According to the forklift of the present invention, the projecting portion extending from the tank body toward the suction portion of the delivery portion is provided, and the supply portion to which the pipe for supplying the liquid to the delivery portion is connected is provided on the projection portion, thereby arranging the tank. There is an effect that the space can be easily secured and energy saving can be improved.

It is a schematic diagram explaining the whole structure of the forklift which concerns on the 1st Embodiment of this invention. It is a top view explaining the arrangement | positioning of the hydraulic pressure supply part in internal space. It is a side view explaining the arrangement | positioning of the hydraulic supply part in the internal space of FIG. FIG. 3 is a rear view for explaining the arrangement of hydraulic pressure supply units in the internal space of FIG. 2. It is a perspective view explaining the shape of the oil tank of FIG. It is a top view explaining arrangement | positioning of the hydraulic motor in the interior space in the forklift truck concerning the 2nd Embodiment of this invention. It is a side view explaining the arrangement | positioning of the hydraulic motor in the internal space of FIG. It is a top view explaining arrangement | positioning of the hydraulic motor in the internal space in the forklift truck concerning the 3rd Embodiment of this invention. FIG. 9 is a side view for explaining the arrangement of the hydraulic motor in the internal space of FIG. 8. It is a rear view explaining the arrangement of the hydraulic motor in the internal space of FIG. It is a schematic diagram explaining the structure of the oil tank in the forklift of the 4th Embodiment of this invention. It is a side view explaining the connection of the hydraulic piping in the internal space of this embodiment. It is a rear view explaining the connection of the hydraulic piping in internal space.

[First Embodiment]
A counterbalance forklift 1 (hereinafter referred to as “forklift 1”) according to a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a schematic diagram illustrating the overall configuration of a forklift 1 according to this embodiment, FIG. 1 (a) is a plan view, and FIG. 1 (b) is a side view.

  The forklift 1 according to this embodiment is used for transporting luggage, and is particularly used for cargo handling work in a factory, a warehouse, a freight station, a port, or the like. As shown in FIG. 1, the forklift 1 mainly includes a vehicle main body 10, front wheels 20 and rear wheels 30 used for traveling the forklift 1, a driver seat 40 on which a driver rides, and a cargo handling unit 50 that handles luggage. Is provided.

  The vehicle main body 10 is provided with a cargo handling section 50 on the front surface and a driver seat 40 in the center of the upper surface. A pair of front wheels 20 is provided in front of the lower portion, and a pair of rear wheels 30 are provided in the lower rear portion. It is what has been. Further, as shown in FIGS. 2 to 4, a high-pressure oil (liquid) used for a cargo handling operation in the cargo handling section 50 is supplied to the internal space 11 of the vehicle body 10 as shown in FIGS. 2 to 4. A hydraulic pressure supply unit 60, a battery 81 for supplying electric power to the traveling motor 21 and the hydraulic pressure supply unit 60, a controller 82 for controlling these devices, and the like are housed.

  The vehicle body 10 is mainly provided with a bottom portion 12 that forms the bottom surface of the internal space 11, a side portion 13 that forms a part of the side surface, and an upper portion 14 that forms the top surface. A partition wall 15 is provided so as to extend in the left-right direction. Further, the vehicle body 10 is provided with a step portion 16 that protrudes in the left-right direction from the side portion 13 between the front wheel 20 and the rear wheel 30 and whose upper surface is lower than the upper portion 14 in a stepped shape.

The bottom portion 12 and the side portion 13 are strength members constituting the vehicle main body 10, and may be plate-like (plate-like) members or frame-like (beam-like) members.
The bottom 12 supports the traveling motor 21, the hydraulic pressure supply unit 60, the battery 81, the controller 82, and the like disposed in the internal space 11 from below. The side portion 13 is a member that extends forward to at least the vicinity of the traveling motor 21 and is a member to which the traveling motor 21 is attached and fixed. Further, a portion of the side portion 13 that faces the step portion 16, particularly a portion where the oil tank 61 is disposed, is formed by notching so that the inside of the step portion 16 can be used as the internal space 11.

  The upper part 14 also constitutes the floor surface of the driver's seat 40. A part of the upper part 14 is configured to be openable and closable, and this open / close part serves as an access path for performing maintenance work for the traveling motor 21, the hydraulic pressure supply part 60, the controller 82, and the like disposed in the internal space 11. ing.

  The hydraulic pressure supply unit 60 includes an oil tank (tank) 61 that is a container that stores oil therein, a hydraulic unit that includes a pump unit 72 that boosts the oil and supplies the oil to the cargo handling unit 50, and an electric motor unit (motor unit) 74. A motor (sending part) 71, a hydraulic valve 75 that controls the supply of the pressurized oil to the cargo handling part 50, and a hydraulic pipe (pipe) 76 that constitutes a path through which oil circulates together with these components are mainly used. Is provided.

  The front wheel 20 drives the forklift 1 by being driven to rotate by a traveling motor 21. The traveling motor 21 generates a rotational driving force that causes the forklift 1 to travel with electric power supplied from the battery 81.

  In the present embodiment, one traveling motor 21 is disposed on one front wheel 20 and the description is applied to an example in which the rotational axes of the front wheels 20 and the traveling motor 21 are coaxial.

  As shown in FIG. 1, the rear wheel 30 is a steering wheel that is steered by the steering 41 of the driver's seat 40, and is a driven wheel that rotates as the forklift 1 travels. As the configuration of the rear wheel 30, a known configuration can be used, and the format and the like are not limited.

  The driver's seat 40 is provided on the upper portion 14 of the vehicle main body 10 and is a portion where a driver of the forklift 1, in other words, an operator who performs a cargo handling operation gets on. The driver seat 40 is provided with a steering 41 used for steering the forklift 1, a lever 42 used for operating the cargo handling unit 50, and the like.

  As shown in FIG. 1, a pair of left and right outer masts 51, a pair of left and right inner masts (not shown) arranged inside the outer mast 51, and high-pressure oil supplied from a hydraulic pressure supply unit 60 are loaded on the cargo handling unit 50. A lift cylinder 53 that raises and lowers the inner mast by use and a pair of forks 54 extending forward from the inner mast are mainly provided.

  Next, the shape of the oil tank 61 and the arrangement of each device such as the hydraulic pressure supply unit 60 in the internal space 11 which are features of the present embodiment will be described. FIG. 5 is a perspective view illustrating the shape of the oil tank.

  As shown in FIG. 5, the oil tank 61 is formed into a shape having a protruding portion 63 that protrudes forward from the tank main body 62 and an overhanging portion 64 that extends from the tank main body 62 toward the right side.

  The tank main body 62 constitutes a substantially central portion of the oil tank 61 and is disposed in a region adjacent to the right side of the controller 82 in the internal space 11 as shown in FIG. Further, as shown in FIG. 4, the tank main body 62 is formed with an upper end protrusion 68 extending toward the upper portion 14 of the internal space 11, and the upper end of the upper end protrusion 68 is positioned above the upper surface of the step portion 16. ing.

  As shown in FIG. 2, the protruding portion 63 is formed to extend forward from the overhang portion 64 and is disposed in a region closer to the pump portion 72 of the hydraulic motor 71 than the tank body 62. In the present embodiment, the projecting portion 63 is formed by extending the tank main body 62 entirely as it is, and is applied to an example in which the projecting portion 63 projects forward from the overhanging portion 64. The protruding portion 63 may be formed by extending a part from the tank body 62 forward, and does not limit the shape thereof.

  An opening 69 having an area through which a filter 67 for removing foreign matter contained in oil supplied to the hydraulic motor 71 can pass is provided on the upper surfaces of the tank main body 62 and the protruding portion 63. The opening 69 is closed by a flange 65 which will be described later. When the filter 67 is replaced or inspected, the flange 65 is removed and the opening 69 is exposed.

  The overhanging portion 64 extends from the lower side of the right side surface of the tank main body 62 and is disposed inside the step portion 16 located on the right side of the tank main body 62. The upper end of the overhanging portion 64 is formed lower than the upper end protrusions 68 of the tank main body 62 and the protruding portion 63 so as to be disposed inside the step portion 16.

  A flange 65 having an attachment port (supply part) 66 to which a hydraulic pipe 76 is attached is provided on the upper surfaces of the tank main body 62 and the protruding part 63 of the oil tank 61. The flange 65 is arranged so that the attachment port 66 is located on the upper surface of the protruding portion 63 near the pump portion 72 in the oil tank 61. The attachment port 66 is a member formed in a cylindrical shape that extends upward from the flange 65 and bends to the left in the left-right direction in the middle. A cylindrical member extends from the attachment port 66 to the inside of the oil tank 61 so as to extend near the bottom surface of the oil tank 61.

  In front of the partition wall 15 in the internal space, a controller 82 is arranged in a range from approximately the center in the left-right direction to the left side. An oil tank 61 is disposed in a space formed on the right side of the controller 82. The protruding portion 63 of the oil tank 61 is disposed so as to protrude forward from the controller 82, and the overhanging portion 64 is disposed so as to extend into the step portion 16. At this time, as shown in FIG. 4, the side portion 13 after the notch is disposed above the overhang portion 64.

  A battery 81 is arranged behind the partition wall 15 in the internal space 11 as shown in FIGS. The battery 81 is arranged in a state where it is dropped to the bottom 12. In other words, the battery 81 is placed on the bottom portion 12.

  In front of the controller 82, the hydraulic motor 71 is arranged in a posture in which the pump unit 72 and the electric motor unit 74 are arranged in the left-right direction. The pump unit 72 that is rotationally driven by the electric motor unit 74 is disposed on the side of the oil tank 61 close to the protruding portion 63. Oil is supplied to a suction part 73 for sucking oil in the pump part 72 via a hydraulic pipe 76 attached to the attachment port 66. Since the pump portion 72 and the electric motor portion 74 are disposed on the bottom portion 12 and the attachment port 66 is disposed on the upper surface of the oil tank 61, the hydraulic piping 76 that connects the two extends in the vertical direction (see FIG. 3 and FIG. 4).

  In front of the hydraulic motor 71, a traveling motor 21 that rotationally drives the front wheels 20 is arranged side by side. A hydraulic valve 75 is arranged above the traveling motor 21 arranged on the right side. The position where the hydraulic valve 75 is disposed is also a position below the lever 42 provided in the driver's seat 40.

  The hydraulic valve 75 is connected to a hydraulic pipe 76 through which high-pressure oil boosted by the pump unit 72 flows. A hydraulic pipe 76 that connects the pump part 72 arranged on the bottom 12 and the hydraulic valve 75 arranged above the traveling motor 21 is also arranged extending in the vertical direction (see FIG. 3).

  According to the forklift 1 configured as described above, the protruding portion 63 extending from the tank body 62 toward the suction portion 73 of the hydraulic motor 71 is provided, and the hydraulic pipe 76 that supplies oil to the hydraulic motor 71 is connected to the protruding portion 63. By providing the attachment port 66, the hydraulic pipe 76 that sends oil from the oil tank 61 to the hydraulic motor 71 can be shortened. Therefore, the loss when oil is sent from the oil tank 61 to the hydraulic motor 71 can be reduced, and energy saving can be improved.

  Further, by providing the protruding portion 63 in the tank main body 62, the tank main body 62 and the hydraulic motor 71 can be arranged apart from each other without increasing the above-mentioned loss as compared with the case where the protruding portion 63 is not provided. Therefore, even when it is not possible to secure a sufficient space for disposing the oil tank 61 in the vicinity of the hydraulic motor 71, a necessary volume can be provided at a position away from the hydraulic motor 71 by securing a space for providing the protrusion 63. The secured oil tank 61 can be arranged. In other words, a necessary volume can be secured in the oil tank 61 disposed inside the forklift 1.

  The upper end of the tank main body 62 arranged inside the vehicle main body 10 protrudes upward from the upper surface of the step portion 16, and the oil tank 61 is provided with an overhanging portion 64 extending inside the step portion 16. It is easy to secure the necessary volume.

  The hydraulic motor 71 is arranged in another posture by arranging the hydraulic motor 71 such that the pump unit 72 is arranged on the oil tank 61 side and the pump unit 72 and the electric motor unit 74 are arranged in the left-right direction of the vehicle body 10. Compared with the case where it does, the hydraulic piping 76 which guides oil from the protrusion part 63 of the oil tank 61 to the suction | inhalation part 73 of the hydraulic motor 71 can be shortened. Further, compared to the case where the pump unit 72 and the electric motor unit 74 are arranged side by side in the front-rear direction of the vehicle main body 10, the length in the front-rear direction of the internal space 11 that houses the hydraulic motor 71 and the like in the vehicle main body 10 can be easily shortened. .

  Since the opening 69 having an area through which the filter 67 can pass is provided on the upper surfaces of the tank main body 62 and the projecting portion 63, the filter 67 disposed in the oil tank 61 can be easily replaced or inspected.

  By disposing the battery 81 below the front wheel 20 and the rear wheel 30 in the internal space 11 of the vehicle body 10 and disposing the controller 82 in the center of the front of the battery 81, the forklift 1 has a low center of gravity and is stable. Can be achieved.

  Further, by arranging the hydraulic motor 71 in the front area of the controller 82 in the internal space 11 and arranging the oil tank 61 in the side area of the controller 82, both the hydraulic motor 71 and the oil tank 61 are placed in the front area of the controller 82. Compared with the case where it arrange | positions to, the front-back direction length of the internal space 11 which accommodates the hydraulic motor 71 etc. in the vehicle main body 10 is easy to be shortened. Further, by disposing the oil tank 61 in the side region of the controller 82, which is the remaining space after the battery 81 and the controller 82 are disposed in the internal space 11, the oil tank 61 is disposed in the front region of the controller 82. Compared to the above, it is easy to secure a space for disposing the oil tank 61 having a necessary volume.

  In the above-described embodiment, the oil tank 61 that stores oil used for cargo handling of the forklift 1 has been described as being applied to the example in which the protruding portion 63 and the overhanging portion 64 are provided. However, the oil used for steering the forklift 1 is used. The protruding portion 63 and the overhanging portion 64 may be provided in a tank that stores water, a tank that stores supplementary water for the battery 81, or a tank that stores fuel for an engine-type forklift, and is not particularly limited.

[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to FIGS.
The basic configuration of the forklift according to this embodiment is the same as that of the first embodiment, but the arrangement of the hydraulic motor is different from that of the first embodiment. Therefore, in the present embodiment, the arrangement of the hydraulic motor will be described with reference to FIGS. 6 and 7, and description of other components and the like will be omitted.

  FIG. 6 is a top view for explaining the arrangement of the hydraulic motor 171 in the internal space 11 in the forklift 101 according to this embodiment, and FIG. 7 is a side view for explaining the arrangement of the hydraulic motor 171 in the internal space 11. It is.

  In the internal space 11 of the forklift 101 according to the present embodiment, as shown in FIGS. 6 and 7, a traveling motor 21, a hydraulic pressure supply unit 160 that supplies high-pressure oil used for cargo handling, and a high-pressure used for steering are used. A steering motor 83 for supplying the oil, a battery 81 for supplying electric power, a controller 82 for controlling these devices, and the like are housed.

  The hydraulic supply unit 160 is mainly provided with an oil tank 61, a hydraulic motor (sending unit) 171 including a pump unit 72 and an electric motor unit 74 for boosting oil, a hydraulic valve 75, and a hydraulic pipe 76. ing.

  The hydraulic motor 171 is arranged in a region adjacent to the front of the controller 82 in the internal space 11 as in the first embodiment. In the present embodiment, the hydraulic motor 171 is disposed in an oblique posture in which the pump portion 72 is forward and the electric motor portion 74 is rearward, and the pump portion 72 is lower and the electric motor portion 74 is upper. . Furthermore, the hydraulic motor 171 is disposed so that the pump unit 72 is positioned between the traveling motors 21 that are disposed to be separated from each other in the front left and right directions.

  The shape and position of the oil tank 61, the position of the hydraulic valve 75, the position of the controller 82, and the like are the same as in the first embodiment. The description is omitted only for description.

  By arranging the hydraulic motor 171 so that the pump part 72 and the electric motor part 74 are arranged in the vertical direction of the vehicle body 10 with the pump part 72 below the electric motor part 74 as in the above configuration, the pump Oil flowing through the portion 72 can be prevented from entering the electric motor portion 74. In other words, it is possible to prevent the electric motor unit 74 from being damaged by oil. Further, the longitudinal length of the internal space 11 for accommodating the hydraulic motor 171 and the like in the vehicle body 10 is shortened as compared with the case where the pump unit 72 and the electric motor unit 74 are horizontally arranged in the longitudinal direction of the vehicle body 10. It's easy to do.

  Although the present embodiment has been described by applying to an example in which the hydraulic motor 171 is disposed obliquely, the hydraulic motor 171 is disposed in a posture in which the pump unit 72 and the electric motor unit 74 are arranged vertically in the vertical direction. The detailed angle of the posture to be arranged is not limited.

[Third Embodiment]
Next, a third embodiment of the present invention will be described with reference to FIGS.
The basic configuration of the forklift according to this embodiment is the same as that of the first embodiment, but the arrangement of the hydraulic motor is different from that of the first embodiment. Therefore, in the present embodiment, the arrangement of the hydraulic motor will be described with reference to FIGS. 8 to 10, and description of other components and the like will be omitted.

  FIG. 8 is a top view for explaining the arrangement of the hydraulic motor 271 in the internal space 11 in the forklift 201 according to the present embodiment, and FIG. 9 is a side view for explaining the arrangement of the hydraulic motor 271 in the internal space 11. FIG. 10 is a rear view for explaining the arrangement of the hydraulic motor 271 in the internal space 11.

  In the internal space 11 of the forklift 201 of the present embodiment, as shown in FIGS. 8 to 10, the traveling motor 21, the hydraulic pressure supply unit 260 that supplies high-pressure oil used for cargo handling, and the high-pressure used for steering are used. A steering motor 83 for supplying the oil, a battery 81 for supplying electric power, a controller 82 for controlling these devices, and the like are housed.

  The hydraulic supply unit 260 is mainly provided with an oil tank 61, a hydraulic motor (delivery unit) 271 including a pump unit 72 that boosts oil and an electric motor unit 74, a hydraulic valve 75, and a hydraulic pipe 76. ing.

  The hydraulic motor 271 is arranged in a region adjacent to the front of the controller 82 in the internal space 11 as in the first embodiment. In this embodiment, the hydraulic motor 271 is arranged in such a posture that the pump part 72 is arranged on the upper side in the vertical direction and the electric motor part 74 is arranged on the lower side. Further, the hydraulic motor 271 is disposed at a position near the oil tank 61 in a region adjacent to the front of the controller 82.

  By arranging the pump unit 72 on the upper side in the vertical direction of the electric motor unit 74 and arranging the hydraulic motor 271 so that the pump unit 72 and the electric motor unit 74 are aligned in the vertical direction of the vehicle body 10 as in the above configuration. The distance from the attachment port 66 of the oil tank 61 to the suction part 73 of the pump part 72 can be shortened. Therefore, loss when oil is sent from the oil tank 61 to the hydraulic motor 271 can be reduced, and energy saving can be improved.

[Fourth Embodiment]
Next, a fourth embodiment of the present invention will be described with reference to FIGS.
The basic configuration of the forklift according to this embodiment is the same as that of the first embodiment, but is different from the first embodiment in the arrangement position of the attachment port in the oil tank. Therefore, in the present embodiment, the configuration of the oil tank, the connection of the hydraulic piping, and the like will be described using FIGS. 11 to 13, and the description of the other components and the like will be omitted.

  FIG. 11 is a schematic diagram illustrating the configuration of the oil tank 361 in the forklift 301 of the present embodiment, FIG. 12 is a side view illustrating the connection of the hydraulic piping 76 in the internal space 11, and FIG. FIG. 6 is a rear view for explaining the connection of the hydraulic piping 76 in the internal space 11.

  The oil tank (tank) 361 in the forklift 301 of the present embodiment is provided with an attachment port (supply part) 366 to which the hydraulic pipe 76 is attached below the projecting part 63 as shown in FIG. More specifically, an attachment port 366 is provided below the forward-facing surface of the protrusion 63. Therefore, the flange 365 disposed on the upper surface of the tank main body 62 and the protruding portion 63 of the oil tank 61 is not provided with an attachment port. The flange 365 closes the opening 69 provided on the upper surfaces of the tank main body 62 and the protruding portion 63.

  The hydraulic pipe 76 attached to the attachment port 366 is connected to the suction part 73 of the pump part 72 as shown in FIGS. The attachment port 366 is disposed on the lower side of the protrusion 63 with a small difference in the vertical position with respect to the suction portion 73 as compared with the first embodiment. Therefore, the hydraulic piping 76 that connects the two is disposed so as to extend substantially in the horizontal direction.

  By providing the attachment port 366 below the protrusion 63 in the oil tank 361 as described above, the distance from the attachment port 366 of the oil tank 361 to the suction portion 73 of the pump unit 72 can be shortened. Therefore, loss when oil is sent from the oil tank 361 to the hydraulic motor 71 can be reduced, and energy saving can be improved.

  The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention. For example, the present invention is not limited to those applied to the above-described embodiments, and may be applied to embodiments obtained by appropriately combining these embodiments, and is not particularly limited.

  DESCRIPTION OF SYMBOLS 1,101,201,301 ... Counterbalance forklift, 10 ... Vehicle body, 11 ... Internal space, 16 ... Step part, 20 ... Front wheel, 30 ... Rear wheel, 61, 361 ... Oil tank (tank), 62 ... Tank Main body 63 ... Projection part 64 ... Overhang part 66, 366 ... Mounting port (supply part), 67 ... Filter, 68 ... Upper end projection part, 69 ... Opening, 71, 171, 271 ... Hydraulic motor (delivery part), 72 ... Pump unit, 73 ... Suction unit, 74 ... Electric motor unit (motor unit), 76 ... Hydraulic piping (pipe), 81 ... Battery, 82 ... Controller,

Claims (7)

A tank for storing liquid inside,
A delivery section for delivering the liquid guided from the tank;
A vehicle main body that houses at least the tank and the delivery section in an internal space;
A battery that is housed between a front wheel and a rear wheel in the internal space of the vehicle body, and that supplies electric power used when at least the liquid is sent out from the delivery unit;
A controller that is disposed in a front central region of the battery in the internal space and controls at least the operation of the delivery unit;
With
The delivery section is a front area of the controller, and is disposed in front of the tank in the vehicle main body , and has a suction section for sucking the liquid,
The tank is provided with a protruding portion that protrudes forward from the tank body, and a supply portion that is connected to a pipe that supplies the liquid from the protruding portion to the suction portion .
The forklift characterized in that the tank is disposed in a lateral region of the controller, and the tank and the controller are disposed so as to overlap each other when viewed from the left-right direction of the vehicle body . The forklift according to claim 1, wherein the protruding portion of the tank protrudes forward of the controller. The vehicle main body is provided with a step portion that protrudes in the left-right direction and whose upper surface position is lowered in a step shape from the vehicle main body, and communicates with the internal space of the vehicle main body,
The tank body includes an upper end protrusion that is disposed inside the vehicle body and has an upper end protruding above the upper surface of the step portion, and an overhang portion that extends toward the internal space of the step portion. The forklift according to claim 1 , wherein the forklift is provided. The delivery unit is provided with a pump unit that sucks and delivers the liquid, and a motor unit that drives the pump unit,
The forklift according to any one of claims 1 to 3, wherein the pump unit and the motor unit are arranged in the left-right direction of the vehicle body, and the pump unit is disposed on the tank side. The delivery unit is provided with a pump unit that sucks and delivers the liquid, and a motor unit that drives the pump unit,
The said pump part and the said motor part are located in the up-down direction in the said vehicle main body, and the said pump part is arrange | positioned below the said motor part , The any one of Claim 1 to 3 characterized by the above-mentioned. The listed forklift. The delivery unit is provided with a pump unit that sucks and delivers the liquid, and a motor unit that drives the pump unit,
The said pump part and the said motor part are located in the up-down direction in the said vehicle main body, and the said pump part is arrange | positioned above the said motor part , The any one of Claim 1 to 3 characterized by the above-mentioned. Forklift. The upper surface of the tank main body and the projecting portion of the tank, from claim 1, characterized in that the opening filter for removing foreign matters contained in the liquid to be sent to the delivery unit is passed is provided 6 The forklift according to any one of the above.

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