GB2387363A - Cooling air management in an industrial truck - Google Patents
Cooling air management in an industrial truck Download PDFInfo
- Publication number
- GB2387363A GB2387363A GB0208308A GB0208308A GB2387363A GB 2387363 A GB2387363 A GB 2387363A GB 0208308 A GB0208308 A GB 0208308A GB 0208308 A GB0208308 A GB 0208308A GB 2387363 A GB2387363 A GB 2387363A
- Authority
- GB
- United Kingdom
- Prior art keywords
- industrial truck
- power electronics
- electronics unit
- traction drive
- air stream
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
- B66F9/075—Constructional features or details
- B66F9/07595—Cooling arrangements for device or operator
Abstract
An industrial truck, in particular a reach truck or a fork-lift reach truck, has a driver position, at least one power electronics unit (5, 6), and at least one electric traction drive motor (7). A cooling device is provided to cool the power electronics unit (5, 6) and the traction drive motor (7). The power electronics unit (5, 6) and the traction drive motor (7) are arranged underneath the driver position. The cooling device may have two fans (17) generating a single air stream. The power electronics unit (5, 6) and the traction drive motor (7) are arranged in the region of the air stream generated by the or each fan (17). A battery block (4) is preferably arranged underneath the driver position, and the power electronics unit (5, 6) is arranged between the battery block (4) and the driver position.
Description
- Coolinq-air management in an industrial truck The invention relates to
an industrial truck, in particular a reach truck or a fork-lift reach truck, having a driver position, at least one power electronics unit, at least one electric 5 traction drive motor and a cooling device for cociing the power electronics unit and the traction drive motor.
Industrial trucks of the aforementioned type have an electric traction drive. The traction drive motor is in this case supplied with electric power from a battery via a power 10 electronics unit, the current supplied to the traction drive motor being controlled as a function of the actuation of appropriate operating elements. Both the power electronics unit and the traction drive motor warm up to a great extent during the operation of the industrial truck due to the increasing requirement for higher power requirements from the electric motor, which makes cooling of these components necessary. For this 15 purpose, air cooling is normally used, for which purpose the traction drive motor and the power electronics unit are arranged in the air streams generated by electrically operated fans.
In the case of reach trucks and fork-lift reach trucks of the prior art, the traction drive
20 motor is usually arranged under a driver's seat. On the other hand, the power electronics unit is located above a battery block, which is located between the driver position and the lifting frame of the industrial truck. This design requires separate cooling devices for the power electronics unit and the traction drive motor.
25 An object of the invention is to provide an industrial truck with a less complicated cooling device.
According to the invention, the power electronics unit and the traction drive motor are arranged underneath the driver position. The adjacent arrangement of traction drive 30 motor and power electronics unit permits common cooling of these components by means of a single cooling device.
The cooling device preferably has at least one fan generating a single air stream, and the power electronics unit and the traction drive motor are arranged in the region of the
air stream. Since the power electronics unit has particularly heatsensitive components, the power electronics unit is located upstream of the traction drive motor, as viewed in the direction of the air stream.
5 Particular advantages result if a battery block is arranged underneath the driver position and the power electronics unit is arranged between the battery block and the driver position. The lengths of the electric leads between battery block, power electronics unit and traction drive motor can be minimized by this means. The installation space available between the battery block and the driver position can be 10 used to arrange the power electronics unit and other components and for cooling- air management. In this case, it is likewise advantageous if a battery block is arranged underneath the driver position and the fan is arranged between the battery block and the driver 1 5 position.
The traction drive motor is arranged on the side of the battery block facing away from a lifting frame of the industrial truck.
20 An air inlet of the fan is arranged between two columns of a lifting frame. The cooling air is therefore taken in in the region of the lifting frame, flows through the interspace present between the battery block and the driver position, in which the power electronics unit is also located, and then passes into the region of the traction drive motor located at the side of the battery block.
An electric steering motor and controller is expediently arranged in the region of the air stream generated by the fan. The steering motor is used to steer the drive wheel connected to the traction drive motor and is likewise cooled by means of the air stream produced by the typically single fan.
It is furthermore expedient if an electric pump motor is arranged in the region of the air stream generated by the fan. The pump motor is used to drive a hydraulic pump which, for example, supplies a hydraulic lifting device and a load handling device with hydraulic oil.
Unnecessary heating of the air stream and therefore of the components arranged in the air stream can be avoided if a hydraulic tank is arranged outside the air stream
generated by the fan. The hydraulic tank constitutes a large heat source, because of the hot hydraulic oil in it. However, the tank is prefereably produced from material insensitive to heat, whereby specific cooling of the tank is not required.
5 An expedient development of the invention results from at least two power electronics units being provided, and the air stream generated by the fan being divided in such a way that each power electronics unit is arranged in the region of a part of the air stream that is not preheated. This measure is used for the purpose of ensuring that air at ambient temperature always flows towards the particularly sensitive power 10 electronics units.
Further advantages and details of the invention will be explained in more detail by using the exemplary embodiment illustrated in the accompanying schematic drawings, in which: Figure 1 shows the drive part of an industrial truck according to the invention in plan view, Figure 2 shows the drive part as viewed from the load side, Figure 3 shows the coolingair management in the area of the power electronics 20 units. Figure 1 shows the drive part of an industrial truck according to the invention, designed as a reach truck, in plan view. The illustration shows part of a baseplate 1 of a driver position with pedals 2. In the lower area in the drawing, the cover has been removed, 25 so that the units arranged underneath the driver position are visible. Indicated by dashed lines is a battery block 4 arranged underneath the driver position. On the front side of the driver position, behind coverings 13, are the columns 3 of a lifting frame, with which a load handling device (not illustrated) can be moved in the vertical direction. The following components, arranged underneath the driver position, must be cooled during the operation of the industrial truck: a first and a second power electronics unit 5, 6, a traction drive motor 7, an electric steering motor and controller 8 and an electric pump motor 9. The air inlet 10 to the cooling device is located on the load side of the 35 drive part, between the two columns 3 of the lifting frame. The direction of the cooling-
air stream provided to cool all the abovementioned components is identified by arrows 11. A hydraulic tank belonging to the industrial truck is located under a step 12, in such
a way that the heat dissipated by the hydraulic tank is not transmitted, or transmitted to only a low extent, to the drive motor 7 or to other components to be cooled.
Figure 2 shows the drive part, viewed from the load side. It is possible to see in 5 particular the air inlet 10, a power electronics unit 5, the traction drive motor 7, the electric steering motor 8 and the electric pump motor 9. Underneath the traction drive motor 7 there is the drive wheel 14 driven by it and belonging to the industrial truck.
In Figure 3, the cooling-air management in the region of the power electronic units 5, 6 10 is illustrated in the section B-B according to Fig. 1. Directly behind the air inlet 10 there are two electrically driven fans 17 arranged in series, which generate the single air stream required for the air cooling. In the region of the power electronics units 5, 6, the air stream is divided into two part streams by means of two ducts 15, 16. The power electronics units 5, 6 are cooled via their baseplates 5a, 6a, each of these baseplates 15 5a, 6a adjoining one of the ducts 15, 16 and therefore being cooled with air at ambient temperature. Downstream of the ducts 15, 16, the cooling air enters a unit space, in order in particular to cool the traction drive motor 7, the steering motor and controller 8 and the electric pump motor 9 which are in that unit space.
Claims (13)
1. Industrial truck having a driver position, at least one power electronics unit, at least one electric traction drive motor, and a cooling device for cooling the power electronics unit and the traction drive motor, wherein the power electronics unit 5 and the traction drive motor are arranged underneath the driver position.
2. Industrial truck according to Claim 1, wherein the cooling device has at least one fan generating a single air stream, and the power electronics unit (5, 6) and the traction drive motor are arranged in the region of the air stream.
3. Industrial truck according to Claim 1 or Claim 2, wherein a battery block is arranged underneath the driver position, and the power electronics unit is arranged between the battery block and the driver position.
15
4. Industrial truck according to Claim 2 or 3, wherein a battery block is arranged underneath the driver position, and the fan is arranged between the battery block and the driver position.
5. Industrial truck according to any one of Claims 1 to 4, wherein the traction drive 20 motor is arranged on the side of the battery block facing away from a lifting frame of the industrial truck.
6. Industrial truck according to Claim 5 when dependent on any one of Claims 2 to 4, wherein an air inlet of the fan is arranged between two columns of a lifting frame.
7. Industrial truck according to any one of Claims 2 to 6, wherein an electric steering motor is arranged in the region of the air stream generated by the fan.
8. Industrial truck according to any one of Claims 2 to 7, wherein an electric pump 30 motor is arranged in the region of the air stream generated by the fan.
9. Industrial truck according to any one of Claims 2 to 8, wherein a hydraulic tank is arranged outside the air stream generated by the fan.
10. Industrial truck according to any one of Claims 2 to 9, wherein at least two power electronics units are provided, and the air stream generated by the fan is divided in such a way that each power electronics unit is arranged in the region of a part of the air stream that is not preheated.
11. Industrial truck according to any one of Claims 1 to 1O7 wherein the industrial truck is a reach truck.
12. Industrial truck according to any one of Claims 1 to 10, wherein the industrial truck 10 is a fork lift reach truck.
13. Industrial truck substantially as hereinbefore described with reference to and as shown in the accompanying drawings.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0208308A GB2387363B (en) | 2002-04-10 | 2002-04-10 | Cooling-air management in an industrial truck |
| DE2003112431 DE10312431A1 (en) | 2002-04-10 | 2003-03-20 | Cooling air duct in a truck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0208308A GB2387363B (en) | 2002-04-10 | 2002-04-10 | Cooling-air management in an industrial truck |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB0208308D0 GB0208308D0 (en) | 2002-05-22 |
| GB2387363A true GB2387363A (en) | 2003-10-15 |
| GB2387363B GB2387363B (en) | 2005-09-21 |
Family
ID=9934627
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB0208308A Expired - Fee Related GB2387363B (en) | 2002-04-10 | 2002-04-10 | Cooling-air management in an industrial truck |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE10312431A1 (en) |
| GB (1) | GB2387363B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2208703A1 (en) * | 2009-01-16 | 2010-07-21 | Kabushiki Kaisha Toyoda Jidoshokki | Industrial vehicle with ventilating passage for electrical units |
| US7849951B2 (en) * | 2007-02-28 | 2010-12-14 | Crown Equipment Corporation | Materials handling vehicle having at least one controller coupled to a front wall of a frame |
| US7870919B2 (en) | 2007-02-28 | 2011-01-18 | Crown Equipment Corporation | Materials handling vehicle |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006003410C5 (en) * | 2006-01-24 | 2016-10-27 | Still Gmbh | Pallet truck with aggregate compartments |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10271602A (en) * | 1997-03-26 | 1998-10-09 | Toyota Autom Loom Works Ltd | Drive circuit cooling device for battery-operated fork-lift |
| JP2000044195A (en) * | 1998-07-29 | 2000-02-15 | Toyota Autom Loom Works Ltd | Cooling device for controller in battery-type loading vehicle |
| JP2001063979A (en) * | 1999-08-23 | 2001-03-13 | Toyota Autom Loom Works Ltd | Industrial vehicle and battery type industrial vehicle |
| EP1091048A2 (en) * | 1999-10-07 | 2001-04-11 | Kobleco Construction Machinery Co., Ltd. | Construction machine |
-
2002
- 2002-04-10 GB GB0208308A patent/GB2387363B/en not_active Expired - Fee Related
-
2003
- 2003-03-20 DE DE2003112431 patent/DE10312431A1/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10271602A (en) * | 1997-03-26 | 1998-10-09 | Toyota Autom Loom Works Ltd | Drive circuit cooling device for battery-operated fork-lift |
| JP2000044195A (en) * | 1998-07-29 | 2000-02-15 | Toyota Autom Loom Works Ltd | Cooling device for controller in battery-type loading vehicle |
| JP2001063979A (en) * | 1999-08-23 | 2001-03-13 | Toyota Autom Loom Works Ltd | Industrial vehicle and battery type industrial vehicle |
| EP1091048A2 (en) * | 1999-10-07 | 2001-04-11 | Kobleco Construction Machinery Co., Ltd. | Construction machine |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7849951B2 (en) * | 2007-02-28 | 2010-12-14 | Crown Equipment Corporation | Materials handling vehicle having at least one controller coupled to a front wall of a frame |
| US7870919B2 (en) | 2007-02-28 | 2011-01-18 | Crown Equipment Corporation | Materials handling vehicle |
| EP2208703A1 (en) * | 2009-01-16 | 2010-07-21 | Kabushiki Kaisha Toyoda Jidoshokki | Industrial vehicle with ventilating passage for electrical units |
Also Published As
| Publication number | Publication date |
|---|---|
| DE10312431A1 (en) | 2003-10-30 |
| GB2387363B (en) | 2005-09-21 |
| GB0208308D0 (en) | 2002-05-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3713480B2 (en) | Electric drive wheeled work vehicle | |
| EP2208703B1 (en) | Industrial vehicle with ventilating passage for electrical units | |
| EP2275299A1 (en) | Operating machine | |
| WO2010058768A1 (en) | Working machine | |
| US6942938B2 (en) | System and method for cooling a fuel cell arrangement | |
| KR102573804B1 (en) | Integrated control unit vehicle and method for controlling the same | |
| WO2014109000A1 (en) | Battery forklift | |
| AUPP724198A0 (en) | Vehicle engine coolant pump housing | |
| GB2387363A (en) | Cooling air management in an industrial truck | |
| WO2014109004A1 (en) | Battery forklift | |
| JP2017114153A (en) | Service car | |
| JP2009078622A (en) | Fuel cell two-wheel vehicle | |
| BG97529A (en) | Electric drive system in electric forklift trucks | |
| US20060076427A1 (en) | Lift truck with heating system | |
| US20070227691A1 (en) | Mobile machine with an electric traction motor of a traction drive, an electric pump motor of a hydraulic work system, and fluid cooling | |
| JP4207618B2 (en) | Controller mounting structure for industrial vehicles | |
| US20180178631A1 (en) | Heater apparatus and work vehicle | |
| JP5260930B2 (en) | Work vehicle | |
| JP5976574B2 (en) | Vehicle with bonnet | |
| DE102006003410B4 (en) | Pallet truck with aggregate compartments | |
| JPH10271602A (en) | Drive circuit cooling device for battery-operated fork-lift | |
| WO2024013841A1 (en) | Control unit and motor drive device for electrically driven vehicle, and electrically driven vehicle | |
| JP2002027602A (en) | Cooler for drive circuit in battery forklift | |
| JPH01314667A (en) | Controller cooling device in industrial vehicle | |
| CN115958976A (en) | Ground processing machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20170410 |