WO2005002896A1 - 車輪駆動部構造 - Google Patents
車輪駆動部構造 Download PDFInfo
- Publication number
- WO2005002896A1 WO2005002896A1 PCT/JP2004/009174 JP2004009174W WO2005002896A1 WO 2005002896 A1 WO2005002896 A1 WO 2005002896A1 JP 2004009174 W JP2004009174 W JP 2004009174W WO 2005002896 A1 WO2005002896 A1 WO 2005002896A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- housing
- wheel drive
- hydraulic
- drive unit
- hydraulic motor
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K7/00—Disposition of motor in, or adjacent to, traction wheel
- B60K7/0015—Disposition of motor in, or adjacent to, traction wheel the motor being hydraulic
-
- 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
- B66F9/07509—Braking
-
- 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
- B66F9/07572—Propulsion arrangements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K7/00—Disposition of motor in, or adjacent to, traction wheel
- B60K2007/0038—Disposition of motor in, or adjacent to, traction wheel the motor moving together with the wheel axle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K7/00—Disposition of motor in, or adjacent to, traction wheel
- B60K2007/0092—Disposition of motor in, or adjacent to, traction wheel the motor axle being coaxial to the wheel axle
Definitions
- the present invention relates to a wheel drive unit structure in an industrial vehicle such as a forklift, for example.
- a housing 52 for accommodating a drive shaft system for rotating wheels 51 has a ST-shape in plan view, and includes wheels 51 in the housing 52.
- the housing 52 includes a cylindrical main housing portion 52a in which a drive shaft portion 61 to which the wheels 51 are connected and a hydraulic motor 53 for rotating the drive shaft portion 61 are housed on both sides, and a main housing portion 52a.
- the sub-housing section 52b which is provided in a T-shape from the middle section and accommodates the hydraulic pump 54, is configured (for example, see Patent Document 1).
- Patent Document 1 German Patent Application Publication No. 4405872
- the housing 52 is formed in a T-shape, and the drive shaft 61 and the hydraulic motor 53 connected to the wheel 51 and both hydraulic motors 53, Since the housing 52 is configured to accommodate the hydraulic pump 54 that supplies hydraulic pressure to the housing 53, the housing 52 has a complicated shape, which requires time for machining and increases the manufacturing cost, and the arrangement of the hydraulic pump 54 is inevitable. For example, when designing a vehicle body such as a forklift, the degree of freedom was very narrow.
- an object of the present invention is to provide a wheel drive unit structure that is inexpensive to manufacture and has a high degree of freedom in designing a vehicle body.
- a wheel drive unit structure is configured such that a housing provided below a vehicle body and accommodating a wheel drive unit is formed in a cylindrical shape, and wheel drive is provided at both ends of the housing. And a hydraulic motor for the output shaft of this hydraulic motor. A wet brake device is provided at the other end opposite to the one to which the wheels are mounted.
- the wheel drive unit structure according to the second invention is such that an access hole for operating a release means capable of releasing the braking state of the wet brake device is formed in the housing in the structure according to the first invention. is there.
- the concave portion for the hydraulic pump disposed near the housing while supplying the hydraulic pressure to the hydraulic motor is provided. It is formed on the housing.
- the wheel drive unit structure according to the fourth invention when a hydraulic motor is attached to the housing in the structure according to any one of the first invention to the third invention, a part of the hydraulic motor projects from the housing. As described above, the motor mounting base is formed in the housing.
- the housing for accommodating the wheel drive unit is formed in a cylindrical shape, the shape is simplified as compared with the conventional case where the housing is formed in a T-shape. Since machining can be easily performed, it can be manufactured at low cost.
- the hydraulic pump is installed outside the housing, maintenance and inspection are easier than in the conventional case where the housing is formed in a T-shape and the hydraulic pump is housed integrally. And the degree of freedom in the arrangement of each component on the vehicle body can be greatly improved.
- FIG. 1 is a side view of a forklift having a wheel drive unit structure according to an embodiment of the present invention.
- FIG. 2 is a side view of a main part of the forklift.
- FIG. 3 is a cutaway plan view of a main part showing the wheel drive unit structure.
- FIG. 4 is a view as viewed in the direction of arrows A—A in FIG. 3.
- FIG. 5 is a view as viewed in the direction of arrows BB in FIG. 4.
- FIG. 6 is a schematic side view of a hydraulic motor in the wheel drive unit structure.
- FIG. 7 is a cutaway plan view of a main part showing a conventional wheel drive unit structure. Explanation of reference numerals
- This forklift 1 is provided with front wheels (hereinafter, referred to as front wheels) 3 on the left and right of a front part of a vehicle body 2 and rear wheels (hereinafter, referred to as rear wheels) 4 on the left and right sides of a rear part.
- a column (also referred to as a mast) 6 which has a fork portion 5 for holding luggage and which is vertically expandable and contractible is provided rotatably with respect to the axle of the front wheel 3.
- Branch The column 6 can be tilted forward at a predetermined angle in a vertical plane by a tilting cylinder device (also referred to as a tilting cylinder device) 7.
- the drive system of the forklift 1 is a front wheel drive system.
- the gist of the present invention is that the front wheel drive unit is provided. The following description focuses on this part. That is, as shown in FIG. 3 to FIG. 5, a cylindrical housing 12 for accommodating a front wheel drive shaft system (front axle) 11 is mounted via a mounting member 13 at a lower front portion of the vehicle body 2 of the forklift 1. .
- hydraulic motors also referred to as HST motors
- HST motors which are directly connected to the front wheels 3 and rotationally drive the front wheels 3
- a hydraulic pump 15 mounted on the vehicle body can be arranged close to the housing 12 at a position different from the housing 12 and close to the housing 12 while supplying hydraulic pressure to both hydraulic motors 14 ( A recess 12a (which can be guided) is formed.
- the hydraulic motor 14 has an end portion of the housing 12 (a flange portion, which is an example of a motor mounting pedestal portion) provided by a flange portion 16a projecting from an intermediate portion of a casing 16 thereof. It is attached to 12b with bolt 17. That is, the hydraulic motor 14 is attached to the housing 12 such that a part thereof projects from the housing 12.
- one end outside the output shaft portion 14a of the hydraulic motor 14 is connected to a wheel, that is, a mounting disk portion 3a of the front wheel 3 by a bolt nut 18.
- a plate portion 14b is formed, and a brake device 19 is provided at the other end of the output shaft portion 14a to release the braking state by supplying hydraulic pressure.
- the brake device 19 includes, for example, When the hydraulic pump 15 breaks down, a brake releasing means 20 is provided which can manually release the braking state.
- the brake device 19 includes a wet brake disc portion 21 attached to the other end of the output shaft portion 14a, and a hydraulic cylinder portion that brings the brake disc portion 21 into a brake state and a brake release state.
- a hydraulic cylinder portion that brings the brake disc portion 21 into a brake state and a brake release state.
- the piston 23a is maintained in a braking state by the urging force of the spring 23, but during operation, the piston 22a is moved against the urging force of the spring 23 and released by the supply of hydraulic pressure to the hydraulic cylinder unit 22. State.
- the braking release means 20 is formed at the center of the piston 22a and is provided detachably through a screw portion 24 and a hole 16b formed in the casing 16 thereof, and is engaged with the female screw portion 24. And a detachable bolt (not shown, but also referred to as a release operation tool).
- a bolt is inserted through a hole 16b formed in the force casing 16 to maintain the braking state by the urging force of the spring 23 (arrow a in FIG. 6). If the piston 22a is forcibly moved against the urging force of the spring 23 by engaging and rotating the female thread portion 24 of the piston 22a, the braking state can be released.
- an access hole (hole or cutout) 12c for inserting a bolt as a release operation tool is formed in the housing 12 at a position corresponding to the hole 16b of the hydraulic motor 14 (FIG. 3). reference).
- annular concave portions 12d are formed at left and right positions of the housing 12, and an annular support member 25 connected to the support body 6 is rotatably provided in these concave portions 12d (FIG. 2).
- the hydraulic pressure supplied from the hydraulic pump 15 is supplied to the hydraulic motors 14 provided at both ends of the housing 12, and the front wheels 3 are rotated to travel.
- hydraulic pressure is supplied from the loading hydraulic pump (not shown) to the tilting cylinder device 7, and the tilting operation is also performed on the column 6 supported by the housing 12.
- the column body 6 is expanded and contracted by the telescopic cylinder device, and the fork portion 5 is raised and lowered.
- the brake device 19 provided in each hydraulic motor 14 is in the brake release state, and the vehicle can travel freely.
- the housing 12 for accommodating the front wheel drive shaft system 11 is formed in a cylindrical shape, and only the hydraulic motor 14 for driving the front wheels is disposed at both ends thereof. Compared to a configuration in which a hydraulic motor and a hydraulic pump are accommodated in a U-shape, the shape is simpler and machining can be performed very easily, so that it can be manufactured at low cost. .
- the hydraulic pump 15 is installed outside the housing 12, the maintenance and inspection of the housing is made in a T-shape as compared with the conventional case where the hydraulic pump is housed integrally. This can be easily performed, and the degree of freedom of arrangement of each component device in the vehicle body 2 can be greatly improved. Therefore, in addition to the hydraulic pump, the degree of freedom in designing the arrangement of the engine that drives the hydraulic pump is increased.
- the housing for accommodating the wheel drive unit is formed in a cylindrical shape. Therefore, machining can be performed very easily, so that it can be manufactured at low cost.
- the hydraulic pump is installed outside the housing, maintenance and inspection are easier than in the conventional case where the housing is formed in a T-shape and the hydraulic pump is housed integrally.
- the degree of freedom of arrangement of each component device on the vehicle body can be greatly improved.
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Motor Power Transmission Devices (AREA)
- Forklifts And Lifting Vehicles (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003191547A JP4508561B2 (ja) | 2003-07-04 | 2003-07-04 | 車輪駆動部構造 |
JP2003-191547 | 2003-07-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005002896A1 true WO2005002896A1 (ja) | 2005-01-13 |
Family
ID=33562364
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/009174 WO2005002896A1 (ja) | 2003-07-04 | 2004-06-30 | 車輪駆動部構造 |
Country Status (2)
Country | Link |
---|---|
JP (1) | JP4508561B2 (ja) |
WO (1) | WO2005002896A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2147817A1 (de) * | 2008-07-13 | 2010-01-27 | Rögelberg Holding GmbH & Co. KG | Flurförderzeug und Antriebsachse für ein Flurförderzeug |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10034598A1 (de) * | 2000-07-14 | 2002-01-24 | Apis A S | Radantrieb |
JP2002155504A (ja) * | 2000-11-17 | 2002-05-31 | Sakai Heavy Ind Ltd | 転圧車両 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54155038U (ja) * | 1978-04-19 | 1979-10-27 | ||
JP2588051Y2 (ja) * | 1993-12-13 | 1999-01-06 | 東洋運搬機株式会社 | 大型フォークリフトの走行駆動装置 |
JPH0740239U (ja) * | 1993-12-28 | 1995-07-18 | 関東鉄工株式会社 | 車両用駆動装置 |
JP2908310B2 (ja) * | 1995-12-11 | 1999-06-21 | 川崎重工業株式会社 | タイヤ転圧輪を具備した転圧機械の駆動装置およびタイヤローラ |
-
2003
- 2003-07-04 JP JP2003191547A patent/JP4508561B2/ja not_active Expired - Fee Related
-
2004
- 2004-06-30 WO PCT/JP2004/009174 patent/WO2005002896A1/ja active Application Filing
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10034598A1 (de) * | 2000-07-14 | 2002-01-24 | Apis A S | Radantrieb |
JP2002155504A (ja) * | 2000-11-17 | 2002-05-31 | Sakai Heavy Ind Ltd | 転圧車両 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2147817A1 (de) * | 2008-07-13 | 2010-01-27 | Rögelberg Holding GmbH & Co. KG | Flurförderzeug und Antriebsachse für ein Flurförderzeug |
Also Published As
Publication number | Publication date |
---|---|
JP2005022566A (ja) | 2005-01-27 |
JP4508561B2 (ja) | 2010-07-21 |
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