WO2005088150A1 - 作業車両の油圧バルブ装置 - Google Patents
作業車両の油圧バルブ装置 Download PDFInfo
- Publication number
- WO2005088150A1 WO2005088150A1 PCT/JP2005/003629 JP2005003629W WO2005088150A1 WO 2005088150 A1 WO2005088150 A1 WO 2005088150A1 JP 2005003629 W JP2005003629 W JP 2005003629W WO 2005088150 A1 WO2005088150 A1 WO 2005088150A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- valve
- hydraulic
- pto
- oil
- clutch
- Prior art date
Links
- 230000005540 biological transmission Effects 0.000 claims abstract description 34
- 230000007246 mechanism Effects 0.000 claims abstract description 25
- 239000003921 oil Substances 0.000 claims description 151
- 239000010720 hydraulic oil Substances 0.000 claims description 27
- 239000010687 lubricating oil Substances 0.000 claims description 18
- 230000001276 controlling effect Effects 0.000 claims description 10
- 230000001105 regulatory effect Effects 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 2
- 238000009434 installation Methods 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 description 10
- 238000007689 inspection Methods 0.000 description 7
- 239000002828 fuel tank Substances 0.000 description 6
- 230000007935 neutral effect Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 238000005192 partition Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000004043 responsiveness Effects 0.000 description 2
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 230000000881 depressing effect Effects 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
- F15B13/08—Assemblies of units, each for the control of a single servomotor only
- F15B13/0803—Modular units
- F15B13/0832—Modular valves
- F15B13/0835—Cartridge type valves
-
- 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
- B60K17/00—Arrangement or mounting of transmissions in vehicles
- B60K17/28—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or type of power take-off
-
- 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
- B60K25/00—Auxiliary drives
- B60K25/06—Auxiliary drives from the transmission power take-off
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
- F15B13/08—Assemblies of units, each for the control of a single servomotor only
- F15B13/0803—Modular units
- F15B13/0807—Manifolds
- F15B13/0814—Monoblock manifolds
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D48/00—External control of clutches
- F16D48/02—Control by fluid pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
- F16H3/02—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion
- F16H3/08—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially with continuously meshing gears, that can be disengaged from their shafts
- F16H3/087—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially with continuously meshing gears, that can be disengaged from their shafts characterised by the disposition of the gears
- F16H3/089—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially with continuously meshing gears, that can be disengaged from their shafts characterised by the disposition of the gears all of the meshing gears being supported by a pair of parallel shafts, one being the input shaft and the other the output shaft, there being no countershaft involved
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/0003—Arrangement or mounting of elements of the control apparatus, e.g. valve assemblies or snapfittings of valves; Arrangements of the control unit on or in the transmission gearbox
- F16H61/0009—Hydraulic control units for transmission control, e.g. assembly of valve plates or valve units
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D48/00—External control of clutches
- F16D48/02—Control by fluid pressure
- F16D2048/0257—Hydraulic circuit layouts, i.e. details of hydraulic circuit elements or the arrangement thereof
- F16D2048/0281—Complex circuits with more than two valves in series or special arrangements thereof not provided for in previous groups
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2500/00—External control of clutches by electric or electronic means
- F16D2500/10—System to be controlled
- F16D2500/102—Actuator
- F16D2500/1026—Hydraulic
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2500/00—External control of clutches by electric or electronic means
- F16D2500/10—System to be controlled
- F16D2500/11—Application
- F16D2500/1107—Vehicles
- F16D2500/1112—Heavy vehicle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2500/00—External control of clutches by electric or electronic means
- F16D2500/70—Details about the implementation of the control system
- F16D2500/704—Output parameters from the control unit; Target parameters to be controlled
- F16D2500/70402—Actuator parameters
- F16D2500/70406—Pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
- F16H3/02—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion
- F16H3/08—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially with continuously meshing gears, that can be disengaged from their shafts
- F16H2003/0818—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially with continuously meshing gears, that can be disengaged from their shafts comprising means for power-shifting
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H2057/02013—Extension units for gearboxes, e.g. additional units attached to a main gear
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H2200/00—Transmissions for multiple ratios
- F16H2200/003—Transmissions for multiple ratios characterised by the number of forward speeds
- F16H2200/0034—Transmissions for multiple ratios characterised by the number of forward speeds the gear ratios comprising two forward speeds
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/02—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used
- F16H61/0202—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric
- F16H61/0204—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal
- F16H61/0246—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal characterised by initiating reverse gearshift
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/6851—With casing, support, protector or static constructional installations
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/6851—With casing, support, protector or static constructional installations
- Y10T137/6855—Vehicle
Definitions
- the present invention relates to a hydraulic valve device for a working vehicle, and more particularly, to changing the valve layout to improve operability, make the configuration compact, and perform replacement and maintenance of the valve. Regarding technology to facilitate.
- a PTO valve device for a working vehicle is publicly known as described in Patent Document 1, for example.
- the rear end of the rear housing of the fuselage is covered with a PTO rear cover, and the brake shaft of a brake for braking the clutch housing of the PTO clutch by the PTO rear cover.
- the sub-assembly is constructed by supporting the ends of the clutch shaft and the PTO shaft, and the sub-assembly is installed in the body at the same time as the PTO rear cover is mounted on the rear end of the rear housing.
- the sub-assembly is constructed by supporting the ends of the clutch shaft and the PTO shaft, and the sub-assembly is installed in the body at the same time as the PTO rear cover is mounted on the rear end of the rear housing.
- the PTO rear cover mounted on the power take-off device of the conventional work vehicle does not take into account the modularization of the PTO valve device. It did not consider switching to the PTO clutch mechanism of the formula.
- the position of the conventional PTO knob device is located away from the PTO clutch mechanism, loss occurs when pressure oil passes through piping and the like arranged between them, and the hydraulic pressure control pressure changes. However, the control was unstable.
- a forward / reverse switching device controls forward / backward using a forward hydraulic clutch and a reverse hydraulic clutch, and switches the traveling direction of the work vehicle.
- a control valve device in which valves for controlling the operation of the forward / reverse switching device are interpolated is called a control valve device, and a device arranged on one side of a fuselage or a housing is known (for example, see Patent Document 1). 2 and Patent Document 3).
- Patent Documents 2 and 3 disclose a structure of a control valve device as shown in FIG. That is, the control valve device 469 is passed through the opening 451 in one side wall of the front housing 401 of the body housing, and is fixed to the front housing 401.
- the control valve device 469 includes a plate member 469a extending along the outer surface of the side wall of the front housing 401, an outer housing member 469b extending along the outer surface of the plate member 469a through a thin partition plate 450, and an inner surface of the plate member 469a. And an inner housing member 469c positioned in the front housing 401.
- the plate member 469a is screwed to the outer housing member 469b and a bolt via a partition plate 450, and the inner housing member 469c is screwed inside the plate member 469a.
- the plate member 469a is mainly used for forming an oil passage
- the partition plate 450 has a connection oil passage formed between the plate member 469a and the outer housing member 469b.
- the connection between the oil passage in the plate member 469a and the oil passage in the inner housing member 469c is made up of the corresponding oil passages facing each other.
- a housing portion 469d is formed on the outer surface of the outer housing member 469b of the control valve device 469, and a main relief valve 471 and a direction switching valve 470 for controlling the flow rate of hydraulic oil are provided inside the housing portion 469d. And are provided along the front-rear direction.
- a relief valve 472, a flow control valve 473, an oil passage shutoff valve 474, and the like are arranged in the inner housing member 469c along the front-rear direction.
- control valve device is detachably mounted to the forward / reverse transmission or the like, it has been easy to assemble the forward / reverse switching device into the body housing.
- control valve device itself could be easily attached to the side walls of the fuselage and the housing with simple fixing means such as bolts, and the control valve device itself was easily attached.
- the conventional control valve device has a configuration in which the valves are arranged to overlap in the left-right direction of the work vehicle, so that the thickness in the left-right direction is large, and since the control valve device is constituted by a plurality of members, it is compact. Was difficult to configure.
- the fuel tank is located on the left and right sides of the fuselage frame.
- the control valve device is on one side of the body frame It is provided on the wall and is located in the gap between the fuel tank and the body frame. If the thickness of the control valve device in the left-right direction was large, it was not possible to increase the tank capacity of the fuel tanks located on the left and right sides of the airframe.
- control valve devices disclosed in Patent Documents 2 and 3 are provided with an opening on one side wall of the body frame, so that a manufacturing process for separately forming the opening is complicated. , Manufacturing costs.
- Patent Document 1 JP 2003-94970A
- Patent Document 2 JP-A-8-156620
- Patent Document 3 JP-A-8-277802
- the present invention aims at modularizing a PTO valve device as a hydraulic valve device, and switching a mechanical PTO clutch mechanism to a hydraulic PTO clutch mechanism. Is made possible. It also aims to reduce hydraulic pressure loss, achieve stable hydraulic control, and improve maintainability of the PTO valve device and hydraulic port.
- a control valve device as a hydraulic valve device, a modular structure of valves is realized, a compact member is formed by forming a single member, and the arrangement of the valves is changed to provide a structure that is easy to maintain. It is intended for that purpose.
- a PTO rear cover that accommodates a PTO transmission mechanism having a hydraulic PTO clutch is attached to the rear end of the rear housing of the fuselage, and the PTO rear cover is attached to the PTO rear cover.
- a PTO valve for PTO clutch on / off control is provided integrally, and an oil passage that connects the PTO knob and ⁇ clutch, and a hydraulic port for supplying and discharging oil to and from the ⁇ valve and ⁇ clutch are provided inside the rear cover. It is characterized by being formed in.
- the ⁇ transmission mechanism includes a hydraulic ⁇ ⁇ ⁇ brake, a valve for setting an oil pressure is disposed on the body side of the machine body, and the pressure oil supplied by the valve power is supplied to the ⁇ valve.
- ⁇ Valves provide control of the supply of pressure oil to ⁇ clutch and ⁇ brake.
- an oil detection window may be provided on the rear force bar, wherein the rear valve may be arranged above the rear cover.
- a second aspect of the present invention relates to a control valve device for a work vehicle that has a plurality of valves for controlling the operation of a forward / reverse switching device and is fixed to one side of an airframe or a housing.
- the valves are arranged on an attachment member formed of a single plate-like member on a substantially parallel plane to a plane in contact with the body housing.
- valves may be arranged parallel or perpendicular to each other.
- valves control at least supply and discharge of hydraulic oil to the forward / reverse switching device.
- An ONZOFF valve and a proportional valve may be provided, and the ONZOFF valve and the proportional valve may be arranged so as to be insertable / removable from below. Further, the valves may supply at least lubricating oil to the forward / reverse switching device. It may include a main relief valve and a regulating valve for controlling the discharge, and the main relief valve and the regulating valve may be arranged so as to be able to be inserted and removed from the longitudinal direction of the body housing.
- a means for detecting hydraulic oil pressure to the forward / reverse switching device is detachably provided from below.
- a modular type hydraulic clutch can be realized. Then, by attaching and detaching the rear cover, it is possible to easily switch to the specification with or without the hydraulic clutch.
- the oil passage connected to the valve is located on the rear cover, which facilitates oil pressure management and control.
- the clutch (1) and the valve (2) could be arranged close to each other, reducing hydraulic pressure loss, improving responsiveness, and improving reliability.
- a valve for setting hydraulic pressure is arranged on the body side of the aircraft, and pressure oil supplied from the valve is supplied to the PTO valve, and the pressure oil is supplied to the PTO clutch and the PTO brake by the PTO valve. In addition, work can be performed from behind, and maintenance is improved because the control valves are concentrated.
- the PTO valve has a modulation mechanism, is close to the PTO clutch, and has a hydraulic loss. And stable hydraulic control can be realized. In addition, maintenance work and the like can be easily performed from the upper rear.
- an oil detection rod or the like is not required, and a rearward force can easily recognize the amount of hydraulic oil. Also, the number of parts can be reduced.
- the thickness of the control valve device in the left-right direction can be made small and compact, and a large left-right space of the body frame can be secured. Therefore, the maintainability can be improved and the heat dissipation can be improved. Also, the number of parts can be reduced, and the manufacturing cost can be reduced.
- the thickness of the control valve device in the left-right direction can be made smaller. Since the installation length is long and it is necessary to provide many openings with the oil passage, it can be installed almost vertically to the control valve device to secure a space for removal.
- the ONZOFF valve and the proportional valve so that the downward force can be removed, the maintenance frequency of valves and the like can be changed from below the work vehicle by giving priority to the replacement frequency of the proportional valve and the ONZOFF valve.
- the main relief valve and the adjustment valve so that the front and rear forces of the fuselage housing can be inserted and removed, it is possible to lay out the control valve device with a minimum volume.
- the hydraulic valve device is provided with a means for detecting the pressure of the hydraulic oil to the forward / reverse switching device so as to be detachable from the lower side, maintenance of the pressure measuring means, "replacement", and various other operations can be performed. Measurement of pressure becomes easy.
- FIG. 1 is a schematic partially developed longitudinal sectional view showing an overall configuration of a transmission mechanism of a tractor provided with a hydraulic valve device according to one embodiment of the present invention.
- FIG. 2 is a longitudinal sectional side view of a rear part of a body of a tractor.
- FIG. 3 is a cross-sectional front view of the same.
- FIG. 4 is a plan view of the same.
- FIG. 5 is a front view of the same.
- FIG. 6 is a sectional view taken along the line AA in FIG. 5.
- FIG. 7 is a sectional view taken along the line BB in FIG. 5.
- FIG. 8 is a sectional view taken along the line FF in FIG. 5.
- FIG. 9 is a sectional view taken along the line CC in FIG. 6.
- FIG. 10 is a sectional view taken along the line DD in FIG. 6.
- FIG. 11 is a hydraulic circuit diagram of a tractor.
- FIG. 12 is a circuit diagram showing a hydraulic circuit provided in the tractor and control valve device of FIG. 1.
- FIG. 13 is a front perspective view of the control valve device according to the present invention.
- FIG. 14 is a partially exploded side sectional view of a control valve device provided on an outer wall of a body frame of a tractor.
- FIG. 15 is a partially developed plan view of FIG. 4 showing a line filter.
- FIG. 16 is a sectional view taken along the line E-E in FIG. 13.
- FIG. 17 is a rear view of the control valve device.
- FIG. 18 is a front view of the control valve device.
- FIG. 19 is an exploded perspective view of a conventional control valve device.
- a front housing 1, an intermediate housing 2, and a rear housing 3 are provided in front and rear of the tractor body nosing.
- the front housing 1 has an integral support wall la in the middle, and is mounted and supported on the front housing 1 at a position where the inside of the front housing 1 on the rear side of the support wall la is approximately bisected back and forth.
- a second bearing frame 5 attached to and supported by the rear end of the front housing 1.
- the second bearing frame 5 may be attached to and supported by the front end of the intermediate housing 2.
- the intermediate housing 2 has an integral support wall 2a at the intermediate portion, and the rear housing 3 has a front wall 3a, a support wall 32 at the intermediate portion, and a PTO rear cover 3c for closing an opening at the rear end.
- the engine 'flywheel 6 is located at the forefront in the front housing 1, and a driving shaft 8 connected to the engine' flywheel 6 via a buffer joint 7 is provided in the front housing 1.
- the transmission mechanism of the traveling system is configured by connecting a forward / reverse switching device 10, a high / low speed switching device 13, a main transmission 16 and an auxiliary transmission 19 in series.
- the forward / reverse switching device 10 is disposed between the driving shaft 8 and the driven shaft 9 disposed below the supporting wall portion la and the first bearing frame 4.
- the high / low speed switching device 13 is disposed on an extension of the driven shaft 9 between the first bearing frame 4 and the second bearing frame 5, and a drive shaft connected to the driven shaft 9. It is arranged between a driven shaft 11 and a hollow driven shaft 12 arranged on an extension of the driving shaft 8.
- the main transmission 16 is disposed on the extension of the driven shaft 12 and is disposed in the front half of the intermediate housing 2 between the main transmission 16 and the driven shaft 15 disposed on the extension of the hollow drive shaft 14 connected to the driven shaft 15. It is arranged in.
- the auxiliary transmission 19 is disposed in the rear half of the intermediate housing 2 between the driven shaft 15 and the propeller shaft 18 disposed on an extension of the driven transmission shaft 15, and is a hollow counter shaft disposed on an extension of the drive shaft 14.
- the rear end of the propeller shaft 18 extends into the rear housing 3, and includes a small bevel gear 21 combined with an input bevel gear 20 of a differential device (not shown) for left and right rear wheels.
- a front wheel driving force take-out case 22 is attached to the bottom of the middle and housing 2, and the propeller shaft 18 is connected to a front wheel driving force take-out shaft 23 supported by the take-out case 22 via a front wheel drive clutch 24. Have been.
- the transmission mechanism of the PTO system has a transmission shaft 25 having a hollow driven shaft 12, a drive shaft 14, and a counter shaft 17 pierced, connected at its front end to the driving shaft 8, and at the rear end of the transmission shaft 25.
- a PTO clutch 28 is disposed between a transmission shaft 26 provided in the rear housing 3 by coupling and another clutch shaft 27 disposed on an extension of the transmission shaft 26.
- a PTO transmission device 30 having two speed stages is provided between the clutch shaft 27 and a PTO shaft 29 that is disposed below the clutch shaft 27 and extends rearward from the PTO rear cover 3c.
- a hydraulic lift device 33 provided with left and right lift arms 33a for raising and lowering a working machine (not shown) driven by the PTO shaft 29 is installed.
- gears 34 and 35 are loosely fitted on the driving shaft 8, and two gears 36 and 37 are fixed on the driven shaft 9. . Among them, the gears 34 and 37 are directly connected, and the gears 35 and 37 are connected via an intermediate idler gear (not shown).
- a forward hydraulic clutch 40F and a reverse hydraulic clutch 4OR are arranged between the gears 34 and 35.
- Each of the forward hydraulic clutch 40F and the reverse hydraulic clutch 40R includes a gear and a clutch cylinder.
- gears 43 and 44 are loosely arranged on the drive shaft 11 connected to the driven shaft 9 by using the boss portion of the gear 36.
- Two gears 45 and 46 are fixedly mounted on the shaft 12.
- the gears 43 and 44 and the gears 45 and 46 are combined with each other.
- a high-speed hydraulic clutch 48 ° and a low-speed hydraulic clutch 48L having a common clutch cylinder fixed on the drive shaft 11 are disposed between the gears 43 and 44.
- Each high-speed hydraulic clutch 48 ⁇ supports a plurality of friction elements alternately arranged on the boss portion of the gear 43 and the clutch cylinder so as to be slidable and relatively unrotatable. Is moved in the direction of the friction element by the action of hydraulic pressure to obtain a clutch engagement to form a well-known friction multi-plate type.
- the low-speed hydraulic clutch 48L supports a plurality of friction elements alternately arranged on the boss portion of the gear 44 and the clutch cylinder so as to be slidable and relatively unrotatable. Is moved in the direction of the friction element by the biasing force of the disc spring to thereby engage the clutch, which is a so-called spring-operated oil-type friction multi-plate clutch.
- Known structures can be used for the structure of the spring hydraulic oil type friction multi-plate clutch, and a detailed description of the structure is omitted.
- gears 49, 50, 51, 52 are fixed on the drive shaft 14, and four gears 53, 54, 55, 56 are loosely fitted on the driven shaft 15. It is arranged. Of these gears, the corresponding ones are combined, and two multiple synchronous clutches 57 and 58 are arranged on the driven shaft 15 between the gears 53 and 54 and between the gears 55 and 56, and the gears 53 and 54- By selectively coupling 55-56 to the driven shaft 15, four-speed shifting is achieved.
- the counter shaft 17 is connected to the driven shaft 15 via reduction gears 59 and 60 via reduction gears, and two gears 61 and 62 are fixed on the counter shaft 17. .
- a gear 64 connected via a reduction gear mechanism 63 is disposed outside the counter shaft 17 with respect to the gear 62 on the small diameter side.
- gears 64 and 62 are selectively engaged.
- a double clutch 66 is provided in which a shift gear 65 to be obtained is loosely fitted and operated to a position where the shift gear 65 is coupled to the propeller shaft 18 and a position where the propeller shaft 18 is directly coupled to the driven shaft 15. Are arranged.
- the auxiliary transmission 19 can be configured to be in the first speed by the combination of the gears 64 and 65, the second speed by the combination of the gears 62 and 65, the third speed by the combination of the gear 65 with the propeller shaft 18, and the like.
- the direct connection of the propeller shaft 18 to the driven shaft 15 causes each of the four speeds to selectively occur on the propeller shaft 18.
- the rear end of the transmission shaft 26 is rotatably supported by a support wall 32 provided in the middle of the rear housing 3a, and the clutch shaft 27 is provided at the rear end of the transmission shaft 26. Both ends are rotatably supported by the shaft support hole and the PTO rear cover 3c.
- the PTO shaft 29 has a spline 29a formed at the rear end for connection to a universal joint (not shown) for mounting a working machine.
- the PTO clutch 28 has a plurality of friction elements mounted on a rotating boss 28c fixed on the rear end of the transmission shaft 26 and a clutch housing 28a fixed on the front end of the clutch shaft 27. It is configured to be slidable and relatively unrotatable.
- a piston 28b is provided in the clutch housing 28a and urged in a retreating direction by a return spring 28d.
- the PTO clutch 28 presses the friction elements between the friction elements by advancing the piston 28b by the action of hydraulic pressure.
- a so-called friction multi-plate type hydraulic clutch is provided by which clutch engagement is obtained.
- a hydraulic oil passage 81 opened behind the piston 28b is formed parallel to the axis with its base end opened to the back of the clutch shaft 27.
- the clutch shaft 27 is provided with a lubricating oil passage 82 for supplying lubricating oil to the friction element portion of the PTO clutch 28.
- the passage 82 has a clutch disengaged opening end into the clutch housing 28a. In the state, the piston 28b is closed, and the piston 28b is configured to be opened by an oil hole 85 formed in the piston 28b when the clutch is in the advanced state.
- the lubricating oil passage 82 is configured to supply lubricating oil also to the support portion at the front end of the clutch shaft 27, and the base end of the passage 82 is formed between the clutch shaft 27 and the PTO rear cover 3c.
- the lubricating oil port provided on the PTO rear cover 3c 83 are connected.
- the PTO transmission 30 is provided with two gears 27 a ′ 27 b provided so as to rotate integrally with the clutch shaft 27, and is provided so as to freely rotate on the PTO shaft 29.
- the gears 68 and 69 are combined.
- a shifter sleeve 70 is provided on the PTO shaft 29 so as to be relatively non-rotatable and slidable in the axial direction, and a shifter fork 71 is engaged with the shifter sleeve 70.
- the shifter sleeve 70 has spline teeth on its inner peripheral surface that can be engaged with the teeth 68a '69a formed on the bosses of the gears 68, 69.
- the shifter sleeve 70 is selectively slid and displaced by the shifter fork 71, and is engaged with the tooth portion 68a to couple the gear 68 to the PTO shaft 29.
- the second gear ratio can be selectively obtained on the PTO shaft 29 by engaging and connecting the gear 68 to the PTO shaft 29.
- a PTO brake mechanism 90 for braking the clutch housing 28a when the clutch 28 is in the disengaged state is provided. That is, a brake support shaft 95 parallel to the transmission shaft 26 is provided at both ends of the support wall 32 and the PTO rear cover 3c, and a brake shoe 97 is provided on the brake support shaft 95 with an outer peripheral surface of the clutch housing 28a. It is rotatably supported in the direction of contact and separation. The brake shoe 97 is wound around a brake support shaft 95, and is separated from the clutch housing 28 a by a torque spring 96 having one end engaged with the brake shoe 97 and the other end engaged with the upper surface of the support wall 32. To be turned.
- a hydraulic cylinder 92 whose outer end is sealed is inserted in a hole formed in one side wall of the rear housing 3 in an oil-tight manner, fixed to the side wall by a bolt 76, and fitted to the hydraulic cylinder 92.
- the piston 91 is in contact with the free end of the brake 97 at its tip.
- the piston 91 is urged to move backward by a spring 93 provided in the hydraulic cylinder 92, and an oil chamber 94 for moving the piston 91 forward is provided in the hydraulic cylinder 92 and acts on the oil chamber 94.
- the piston 91 is advanced by the hydraulic pressure to be applied, and the brake shoe 97 is pressed against the clutch housing 28a to operate the PTO brake mechanism 90! oil
- An oil passage 78 opening to the chamber 94 is formed on one side wall of the rear housing 3, and the oil pressure is applied to the oil chamber 94 via the oil passage 78 when the PTO clutch 28 is in the disengaged state.
- a fork shaft 73 parallel to the PTO shaft 29 is provided slidably at both ends of the support wall 32 and the PTO rear cover 3c.
- the shift fork 71 of the PTO transmission 30 is fixedly supported by the gear.
- Arms 74 attached to the inner end of a rotary operation shaft 75 penetrating through the side wall of the rear housing 3 are engaged with the fork shaft 73, respectively.
- the rotation operation shaft 75 is connected to an operation lever (not shown) at an outer end thereof. By rotating the rotation operation shaft 75, the shift fork 71 is slid and displaced together with the fork shaft 73. The required displacement is obtained.
- the fork shaft 73 is provided with a detent mechanism 99 for holding the sliding displacement of the fork shaft 73 when the PTO clutch 28 is engaged.
- a detent mechanism 99 for holding the sliding displacement of the fork shaft 73 when the PTO clutch 28 is engaged.
- two ring-shaped grooves 73a '73b are formed around the fork shaft 73, and a ball 99a selectively facing one of the grooves 73a' 73b is provided with a spring 9 on the rod 99b.
- 9c provided inside PTO rear cover 3c.
- the base end of the spring 99c is covered with a bolt 99e screwed into a hole of the PTO rear cover 3c, and is covered.
- the ball 99a is pressed against the rod 99b by the urging force of the spring 99c.
- the ball 99a fits into one of the grooves 73a '73b, so that the fork shaft 73 is not easily slid and displaced. Therefore, when the operator operates the PTO speed change lever, the fork shaft 73 is slid, and the detent mechanism 99 restricts the fork shaft 73 to the first speed position or the second speed position.
- the PTO knob device 72 As shown in FIGS. 5, 6, and 7, the PTO rear cover 3c has a PTO The PTO valve device 72 is provided inside the body, and the PTO valve device 72 is located at the top of the PTO rear cover 3c. It is constituted by an electromagnetic directional switching valve 47 arranged on the side of the modulation type relief valve 67. [0051] As shown in FIG. 5, an inspection window 77 is formed on the PTO rear cover 3c and at a position lateral to the PTO shaft 29, and the operating oil (filled in the housing (transmission case) from the inspection window 77 into the housing (transmission case). (Lubricating oil).
- the inspection window 77 is made up of circular glasses 77a and 77b arranged side by side. If the oil level is visible on the lower glass 77b, it is necessary to add hydraulic oil, and the upper glass 77a If the oil level is visible, the oil level is appropriate and the oil level can be easily checked. In this way, the inspection window 77 can be seen from the rear of the aircraft, and the oil level can be easily checked by inserting the oil sensor rod and pulling out the power, eliminating the need to check the oil level. is there. However, it is also possible to provide a line that indicates an appropriate amount or a line that is not enough for the inspection window as a vertically long inspection window, and the shape and number are not limited.
- the electromagnetic directional control valve 47 is installed vertically (up and down) in the PTO rear cover 3c.
- An oil passage 103 formed in the PTO rear cover 3c communicates with a hydraulic cylinder 92 of the PTO brake mechanism 90 via a port 104.
- An oil passage 112 is formed in the lower part of the electromagnetic directional switching valve 47 in a forward direction.
- the oil passage 112 is used as a pump port to receive pressure oil from a hydraulic pump, and is provided below the electromagnetic directional switching valve 47.
- An oil passage 113 is formed, and the oil passage 113 communicates with the inside of the housing.
- An oil passage 101 is formed in the upper part of the electromagnetic direction switching valve 47 in the left-right direction, and the oil passage 101 is connected to a modulated relief valve 67 described later.
- the electromagnetic direction switching valve 47 and the oil path configuration communicating with the electromagnetic direction switching valve 47 make it possible to switch the oil path communicated with the PTO clutch 28 or the PTO brake mechanism 90.
- the PTO valve device 72 is provided integrally with the PTO rear cover 3c, and the oil passage and the hydraulic port that communicate the PTO valve device 72 and the PTO clutch 28 are formed inside the PTO rear cover.
- a modular type hydraulic PTO clutch can be realized.
- a PTO rear cover equipped with a hydraulic PTO clutch and a PTO rear cover equipped with a mechanical switching device are installed.'Specifications can be easily changed by attaching and detaching, and the number of parts can be reduced by using the same housing. You can.
- work can be performed from the rear of the aircraft, and there is little need for detaching and disassembling peripheral equipment, and maintenance can be performed easily.
- the PTO valve device 72 for switching control can be arranged close to the PTO clutch 28, and the oil passage can be shortened, hydraulic pressure loss is reduced, responsiveness is increased, and stable Hydraulic control is possible.
- FIG. 11 shows an example of a hydraulic circuit of a working vehicle including the valve device 72.
- hydraulic pumps 120, 136 and 137 driven by the engine 6 are provided.
- the hydraulic pump 120 supplies hydraulic pressure from the circuit 140 to the hydraulic clutches 40F and 40R of the forward / reverse switching device 10.
- the hydraulic pump 136 supplies the hydraulic pressure to the switching valve of the power steering mechanism 139 for turning the left and right front wheels to rotate, and the excess oil is supplied from the oil passage 142 via the ONZOFF valve 144 to the front wheel drive switching clutch 24 and the secondary gear.
- the clutch is supplied to the PTO clutch 28 and the PTO brake mechanism 90 via the high / low speed switching clutch 48 and the PTO valve device 72 for use.
- the hydraulic pump 137 supplies hydraulic pressure to a hydraulic cylinder for elevating and lowering attached to the tractor and a drive circuit of an external actuator. From the oil passage 142, lubricating oil can be further supplied to the friction plate portions of the high / low speed switching clutch 48 and the PTO clutch 28 via a relief valve.
- the pressure oil sent to the oil passage 142 is sent to the oil passage 112 of the PTO valve device 72.
- the electromagnetic direction switching valve 47 is switched to the PTO brake mechanism 90.
- the oil is supplied, the piston is extended, and the brake shoe 97 is brought into contact with the outer peripheral surface of the clutch housing 28a to apply braking, thereby preventing inertial rotation.
- the solenoid of the electromagnetic directional control valve 47 is operated and switched to send pressure oil to the modulation type relief valve 67, and the PTO By actuating the clutch 28, power can be transmitted to the PTO shaft 29 to drive it.
- the front housing 201 is the front housing 1 in FIG. 1
- the support wall 201a is the support wall la in FIG. 1
- the driving shaft 208 is the driving shaft in FIG. 8
- the forward / reverse switching device 210 has the same configuration as the forward / reverse switching device 10 in FIG. 1
- the hydraulic clutch 240 has the same configuration as the hydraulic clutch 40 in FIG. 1, and the other configurations have the same configuration. The detailed description is omitted.
- a control valve as a hydraulic valve device The brake device 269 is a forward ONZOFF valve 270F for switching and controlling the supply and discharge of the hydraulic pressure of the forward hydraulic clutch 240F of the forward / reverse switching device 210, and a reverse ONZOFF valve for controlling the supply and discharge of the hydraulic pressure of the reverse hydraulic clutch 240R.
- 270R is located.
- An oil pump 275 for supplying hydraulic oil to the forward hydraulic clutch 240F and the reverse hydraulic clutch 240R is configured as an inscribed internal gear with a drive shaft 208 as a pump shaft, and is provided on the front surface of the support wall 201a. It is installed.
- the oil pump 275 also sucks oil from the oil reservoir 276 in the body frame through the strainer 277 through the finolators 278.
- a line filter 279 is provided at a discharge port of the oil pump 275, and a bypass valve 279a is connected so as to be in parallel with the line filter 279, and hydraulic oil is sent from the oil pump 275 at a constant pressure. I am trying to.
- an oil discharge passage 238 from the oil pump 275 is formed in the support wall 201a.
- the passage 238 communicates with a through hole 286 that is opened from the support wall 201a to the front end of the control valve device 269 in the left-right direction.
- a line filter 279 is provided in the through hole 286.
- the line filter 279 is provided by a coil spring 288 having a screw plug 287 screwed to the control valve device 269 to receive the base end so as to close the through hole 286. It is urged to be movable in the through hole 286.
- the through hole 286 is connected to a pump port 289 formed in the control valve device 269.
- the line filter 279 When the line filter 279 becomes clogged as it is used and the pressure difference before and after the pressure increases to a certain value, the line filter 279 moves against the urging force of the coil spring 288 by hydraulic pressure acting on the inner end thereof, It is configured to directly connect the oil discharge passage 238 and the pump port 289. Therefore, the line filter 279 acts as a no-pass valve at the time of clogging, and the oil supply to the forward hydraulic clutch 240F and the reverse hydraulic clutch 240R due to filter clogging is insufficient, or the oil pump 275 is overloaded. They try not to make any effort.
- the oil from the oil pump 275 is transferred from the through hole 286 through the pump port 289 to the oil passage 280 formed in the control valve device 269.
- An oil passage 280 is connected to a proportional valve 271, a forward ONZOFF valve 270F and a reverse ONZOFF valve 270R, a forward electromagnetic pilot switching valve 282F, a reverse electromagnetic pilot switching valve 282R, and a regulating valve 273. It is.
- the proportional valve 271 is composed of an electromagnetic pilot switching valve 283 and a pilot switching valve 284.
- the electromagnetic pilot switching in the proportional valve 271 is performed through hydraulic oil force finolators 285 and 285 of an oil passage 280. It is transferred to the valve 283 and the pilot switching valve 284, respectively.
- the electromagnetic pilot switching valve 283 has a closed position for shutting off the oil passage and an open position for opening, and receives the pressure oil on the upstream side of the electromagnetic pilot switching valve 283 via the valve spring and the pilot oil passage to close the electromagnetic pilot switching valve 283. , And can be switched from the opposite side of the valve spring to the open position by the solenoid 283a.
- the pilot switching valve 284 has a closed position for shutting off the oil passage and an open position for opening, and is urged to the closed position by receiving the valve spring and the pressure oil on the downstream side.
- the pilot switching valve 284 is communicated with the pilot switching valve 292F '292R of the forward ONZOFF valve 270F and the reverse ONZOFF valve 270R via the oil passage 290.
- the solenoid 283a is operated to switch the electromagnetic pilot switching valve 283 to the open position, hydraulic oil is transferred into the electromagnetic pilot switching valve 283, and the pilot switching valve 284 is moved to the open position via the pilot oil passage. Is switched.
- the flow rate of the working oil in the present embodiment is controlled by a position sensor 296 a disposed near the rotation axis of the clutch pedal 296 and a pressure switch 297 connected to the oil passage 290.
- the proportional valve 271 detects the rotation of the clutch pedal 296 by the position sensor 296a, opens and closes the electromagnetic pilot switching valve 283 in proportion to this rotation, and sends the pilot oil to the operating section of the pilot switching valve 284.
- the pilot switching valve 284 is opened and closed to control the flow rate of hydraulic oil flowing to the forward / reverse switching device 210 via the pilot switching valve 284.
- the forward ONZOFF valve 270F and the reverse ONZOFF valve 270R are a forward electromagnetic pilot switching valve 282F and a reverse electromagnetic pilot switching valve 282R, a forward pilot switching valve 292F and a reverse pilot switching valve 292R.
- the power is also composed. Hydraulic oil from the oil pump 275 is transferred from the oil passage 280 to the electromagnetic pilot switching valve 282F for forward movement and the electromagnetic pilot switching valve 282R for reverse movement via the filters 295 and 295, respectively.
- the hydraulic oil from the proportional valve 271 is transferred to the forward pilot switching valve 292F and the reverse pilot switching valve 292R via the oil passage 290, respectively.
- the forward electromagnetic pilot switching valve 282F (the reverse electromagnetic pilot switching valve 282R) has a closed position for shutting off the oil passage and an open position for opening, and is urged to the closed position by a valve spring, and is operated by a solenoid. By 282a (282a), it can be switched from the opposite side of the valve spring to the open position.
- the solenoid 282a (282a) is operated and the forward electromagnetic pilot switching valve 282F (reverse electromagnetic pilot switching valve 282R) is switched to the open position, the forward electromagnetic pilot switching valve 282F (reverse electromagnetic pilot switching valve 282R)
- the forward pilot switching valve 292F (reverse pilot switching valve 292R) is switched via the pilot oil passage by a powerful hydraulic pressure.
- the forward throttle switching valve 292F selectively operates the neutral position N for disconnecting the hydraulic clutch 24 OF (240R) and the hydraulic clutch 240F (240R). It has a forward operation position F (reverse operation position R), and is urged to the neutral position N by receiving the pressure oil of the valve spring.
- Each of the forward pilot switching valve 292F (reverse pilot switching valve 292R) is connected to a hydraulic clutch 240F '240R via an oil passage 293 (oil passage 294).
- the forward pilot switching valve 292F reverse pilot pilot
- the forward pilot switching valve 292F reverse pilot pilot
- the solenoid 282a (282a) of the forward electromagnetic pilot switching valve 282F (the reverse electromagnetic pilot switching valve 282R) is switched by a forward / backward switching lever (not shown).
- a forward / backward switching lever (not shown).
- the solenoid 282a of the forward electromagnetic pilot switching valve 282F is operated, and the forward electromagnetic pilot switching valve 282F is switched to the open position.
- the forward throttle switching valve 292F is switched to the forward operating position F via the pilot oil passage, and the oil passage 290 is connected to the oil passage 293 via the forward pilot switching valve 292F.
- the forward / reverse switching lever is in the reverse position, the solenoid 282a of the electromagnetic pilot switching valve 282R for reverse is operated, and the pilot switching valve 92R for reverse is switched to the reverse operation position R via the pilot oil passage.
- the main relief valve 272 is disposed downstream of the line filter 279 and in the middle of the oil passage 280, and has a relief oil passage 299 of the main relief valve 272 and the like in the direction of the hydraulic clutches 240F-240R.
- the lubricating oil is supplied to the disc (not shown) of the hydraulic clutch 240F '240R.
- a regulating valve 273 is provided in the middle of the oil passage 299, and the lubricating oil transferred from the main relief valve 272 to the oil passage 299 is drained to an oil sump 276 in the machine body and housing by the regulating valve 273. You. Then, the flow rate of the lubricating oil supplied to the oil passage 299 is adjusted by the differential pressure between the main relief valve 272 and the regulating valve 273.
- the shuttle valve 274 is disposed downstream of the oil passage 299, and is biased and disposed by a valve spring having a double-sided force at a neutral position I that closes the oil passage 299. It is switched to the open position II where the oil passage 299 is opened by receiving the oil pressure in the pilot oil passages 300 and 300 connected to the oil passage. That is, the shuttle valve 74 is moved forward through the pilot oil passage 100.
- the switch When receiving the oil pressure in the oil passage 293 to which the force of the OFF valve 270F has also been transferred, the switch is operated and switched from the neutral position I to the open position II (rightward in FIG. 12).
- the reverse ONZOFF valve 270R force also receives the hydraulic pressure of the transferred oil passage 294 via the pilot oil passage 300, the switch is operated and switched from the neutral position I to the open position II (left side in FIG. 12).
- An oil passage 301 communicating with the shuttle valve 274 is drilled (not shown) between the control valve device 269 and the inside of the body frame, and is branched in two directions on the downstream side to each of the forward hydraulic pressure. It is communicated with the clutch 240F and the reverse hydraulic clutch 240R.
- a forward switching valve 302F and a reverse switching valve 302R are provided in the middle of the branched oil passages 301 and 301, respectively.
- the forward switching valve 302F (reverse switching valve 302R) is urged by a valve spring to a throttle position for restricting the flow rate of the lubricating oil in the oil passage 301, and the forward ONZOFF valve 270F via the pilot oil passage.
- Reverse ON / OFF valve 270R Upon receiving the oil pressure of the oil passage 293 (oil passage 294) to which the force has also been transferred, it is switched to the open position and the lubricating oil is transferred.
- the lubricating oil transferred from the main relief valve 272 via the relief oil passage 299 is either forward or backward when the shuttle valve 274 is opened by the oil pressure of the oil passage 293 and the oil passage 294. After being transferred to the oil passage 301 and the forward switching valve 302F and the reverse switching valve 302R are released by the hydraulic pressure of the hydraulic passages 293 and 294, when the work vehicle moves forward, mainly the forward hydraulic clutch 240F is engaged. Alternatively, lubricating oil is mainly supplied to the reverse hydraulic clutch 240 R during reverse travel. As described above, the shuttle valve 274 and the switching valve 302F '302R, which can be switched by receiving the hydraulic pressure of the hydraulic oil via the pilot oil passage, are provided. Therefore, the hydraulic clutch 240F is controlled while controlling the flow rate according to the drive of the work vehicle. 'It is possible to supply lubricating oil to 240R.
- the mounting member 281 for mounting the valve or the like of the control valve device 269 is formed of a single plate-like member having a substantially rectangular shape in a side view. Are formed so as to be substantially vertical planes in the front-rear direction, and are fixedly attached to the outer surface of the left side wall of the front housing 201 of the body frame.
- the control valve device 269 With a single plate-shaped mounting member 281, the thickness of the control valve device 269 in the left-right direction with respect to the body frame can be reduced. Further, the number of parts can be reduced, and the manufacturing cost can be reduced.
- the above-described oil passage is formed so as to open to the contact plane, and is arranged so that the oil supplied from the oil pump 275 is filled and does not leak to the outside. Is established.
- the outer side surface of the mounting member 281 of the control valve device 269 is formed in an uneven planar shape, and as valves, the forward ONZOFF valve 270F, the reverse ONZOFF valve 270R, the proportional valve 271, the main relief valve 272, and the regulating valve 273, shuttle valve 274, etc. are inserted so that they can be inserted and removed.
- each of the valve power mounting members 281 and the front housing 201 are arranged on substantially one plane parallel to a contact plane between the front housing 201 and the respective members. With such an arrangement, the thickness of the control valve device 269 in the left-right direction can be reduced, and the tank capacity of the fuel tanks (not shown) provided on the left and right sides of the body frame can be increased. .
- the space between the outer surface of the control valve device 269 and the members such as the steps on the body side can be increased. Further, the hydraulic circuit can be compactly formed in the mounting member 281 or on the side surface of the machine body.
- a plurality of mounting holes 304 and the like for inserting the proportional valve 271 and the forward ON ZOFF valve 270F and the like are formed in the lower surface, the front surface, or the rear surface of the mounting member 281.
- Mounting holes 304, 305, and 306 for attaching proportional valves 271, ONZOF F valve 270F for forward movement, and ONZOFF valve 270R for reverse movement are provided on the side 269a so that they can be inserted and removed by drilling downward force upward. Attached.
- through holes for bolt screws to be fixed to the side wall of the front housing 201 are drilled in the left and right direction, and Pico bosses 303-303 are formed due to the strength of the screws! .
- the main relief valve 272 and the adjustment valve 273 are vertically arranged in parallel, the proportional valve 271, the forward ONZOFF valve 270F and the reverse ONZOFF valve 270R are respectively arranged in front and rear parallel, and the main relief valve 272 and the adjustment valve 273 are arranged in parallel.
- the proportional valve 271, the forward ONZOFF valve 270F, and the reverse ONZOFF valve 270R are disposed so as to be substantially orthogonal to the proportional valve 271, the forward ONZOFF valve 270F, and the reverse ONZOFF valve 270R.
- the valves when viewed from substantially the center of the control valve device 269, the valves are arranged radially, and The valves are arranged parallel or perpendicular to each other.
- control valve device 269 With such an arrangement configuration, an optimal arrangement layout for achieving compactness of the control valve device 269 can be achieved, and the control valve device 269 can be easily removed from each other. Furthermore, these valves require a large installation length of the solenoid valve and a large number of openings with the oil passage, so that a space for inserting and removing the valves can be secured.
- the control valve device 269 is provided with mounting holes 304, 305, 306 for the forward ONZOFF valve 270F, the reverse ONZOFF valve 270R, and the proportional valve 271.
- the mounting holes 304, 305, and 306 are arranged substantially vertically upward from the lower part of the control valve device 269 (in FIG. 13, the X direction), and the mounting holes 304, 305, and 306 are viewed from the rear. It is drilled so as to be located on the substantially same plane. Then, a proportional valve 271 is mounted on the mounting hole 304, and a forward ONZOFF valve 270F force is mounted on the mounting hole 305. A reverse ONZOFF valve 270R force is mounted on the mounting hole 306.
- Each mounting hole 304, 305, 306 is located below the control valve device 269. It is inserted inside.
- each of the mounting brushes 304, 305, 306 [top] has an opening 304a '305a' 306a which communicates with the oil passage formed inside the control unit 269. Hydraulic oil from 275 is supplied to each valve.
- the proportional valve 271, the forward ONZOFF valve 270 F and the reverse ONZOFF valve 270 R can be removed from the downward force of the control valve device 269, thereby facilitating the maintenance of these valves. That is, since the control valve device 269 is provided on the outer surface of the front housing 201 disposed on the front side of the body frame disposed in the front and rear directions in the vehicle body, the control valve device 269 is provided in the front direction of the body frame. It is difficult to remove it from above, while it is open if the work vehicle is under downward force, so it can be easily removed.
- a pressure switch 297 as the pressure detecting means is detachably provided in a mounting hole 307 which is formed substantially vertically from below the control valve device 269 upward. Also, pressure measurement ports 311 ⁇ 311 ⁇ ⁇ ⁇ for inspecting and measuring the oil pressure of the forward ONZOFF valve 270F and the reverse ONZOFF valve 270R are also drilled on the lower surface side (X direction) of the control valve device 269. . Therefore, the maintenance and replacement of the pressure switch 297 and the measurement of various pressures can be easily performed.
- the proportional valve 271, the forward ONZOFF valve 270 F, and the reverse ONZOFF valve 270 R are arranged in the control valve device 269, if the control valve device 269 is disposed in the front housing 201, The distal ends of the proportional valves 271, the forward ONZOFF valve 270F, and the reverse ONZOFF valve 270R are all located above the lower end surface of the front housing 201, and the lower end surface of the front housing 201 is configured so as not to protrude. This prevents damage to the proportional valves 271, the forward ONZOFF valve 270F and the reverse ONZOFF valve 270R (see Fig. 14).
- the mounting holes 308 and 309 of the main relief valve 272 and the adjusting valve 273 are directed forward from the rear side of the body frame (the Y direction in FIG. 13), and The mounting holes 308 and 309 are drilled so as to be positioned on substantially the same plane in plan view!
- a main relief valve 272 is mounted in the mounting hole 308, and a regulating valve 273 is mounted in the mounting holes 309 so as to be removably inserted into the mounting holes 308 and 309 from behind the control valve device 269.
- Each of the mounting holes 308 and 309 has an opening 308a'309a communicating with an oil passage formed in the control valve device 269, and hydraulic oil from the oil pump 275 is supplied to each valve. Have been.
- the mounting hole 310 of the shuttle valve 274 is drilled rearward from the front side (Z direction in FIG. 13) of the body frame.
- a shuttle valve 274 is removably inserted into the mounting hole 310 from the front of the control valve device 269.
- the mounting hole 310 is provided with an opening 310 a communicating with an oil passage formed in the control valve device 269, and hydraulic oil from the oil pump 275 is supplied to the shuttle valve 274.
- the control valve device 269 can be easily replaced from the outside without being disassembled. be able to.
- These valves have a somewhat lower maintenance frequency than the proportional valve 271, forward ONZOFF valve 270F and reverse ONZOFF valve 270R, so the proportional valve 271, forward ONZOFF valve 270F and reverse ONZOFF valve are used.
- the proportional valve 271, forward ONZOFF valve 270F and reverse ONZOFF valve are used.
- it is arranged along the longitudinal direction of the fuselage frame. Still, by arranging it in this way, A layout that is small and has a minimum volume of the control valve device 269 becomes possible.
- valves are not limited to those shown in FIGS. 13 and 14.
- the valves may be arranged so that the vertical position and the front-back position are different. Also, the types of valves to be arranged are not limited to these.
- the present invention can be applied to a work vehicle such as a tractor when a variety of valves attached to a transmission case arranged in the work vehicle are modularized to improve operability.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Arrangement And Driving Of Transmission Devices (AREA)
- Lifting Devices For Agricultural Implements (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/593,048 US20080035102A1 (en) | 2004-03-16 | 2005-03-03 | Hydraulic Valve Equipment of Working Vehicle |
EP05719933A EP1757834A4 (en) | 2004-03-16 | 2005-03-03 | HYDRAULIC VALVE DEVICE FOR WORK VEHICLE |
US11/686,282 US8033298B2 (en) | 2004-03-16 | 2007-03-14 | Hydraulic valve equipment of working vehicle |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004-074935 | 2004-03-16 | ||
JP2004074935A JP4643160B2 (ja) | 2004-03-16 | 2004-03-16 | 作業車両のコントロールバルブ装置 |
JP2004-081252 | 2004-03-19 | ||
JP2004081252A JP2005263117A (ja) | 2004-03-19 | 2004-03-19 | 作業車両の動力取出装置 |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/593,048 A-371-Of-International US20080035102A1 (en) | 2004-03-16 | 2005-03-03 | Hydraulic Valve Equipment of Working Vehicle |
US11/686,282 Division US8033298B2 (en) | 2004-03-16 | 2007-03-14 | Hydraulic valve equipment of working vehicle |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005088150A1 true WO2005088150A1 (ja) | 2005-09-22 |
Family
ID=34975660
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/003629 WO2005088150A1 (ja) | 2004-03-16 | 2005-03-03 | 作業車両の油圧バルブ装置 |
Country Status (3)
Country | Link |
---|---|
US (2) | US20080035102A1 (ja) |
EP (2) | EP2273146A3 (ja) |
WO (1) | WO2005088150A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108626389A (zh) * | 2018-06-07 | 2018-10-09 | 陕西法士特汽车传动集团有限责任公司 | 一种商用车后取力器工作保护系统 |
EP3842663A1 (en) * | 2019-12-26 | 2021-06-30 | Kubota Corporation | Work machine |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080035102A1 (en) * | 2004-03-16 | 2008-02-14 | Yanmar Co., Ltd. | Hydraulic Valve Equipment of Working Vehicle |
ATE520562T1 (de) | 2007-04-30 | 2011-09-15 | Parker Hannifin Corp | Hydraulisch betriebener schalter zur leistungsaufnahme |
GB0723990D0 (en) * | 2007-12-08 | 2008-01-16 | Agco Sa | Hydraulic supply systems |
DE102010053010B4 (de) * | 2010-12-02 | 2013-02-07 | Sew-Eurodrive Gmbh & Co. Kg | Getriebedeckel und Getriebe |
DE102013012538A1 (de) * | 2013-07-27 | 2015-01-29 | Borgwarner Inc. | Hvdraulische Steuervorrichtung zur Ansteuerung einer Doppelkupplung und Verfahren zur hydraulischen Steuerung einer Doppelkupplung |
DE102013110316A1 (de) * | 2013-09-19 | 2015-03-19 | Claas Tractor Sas | Zapfwellengetriebe für eine landwirtschaftliche Arbeitsmaschine |
SE538560C2 (en) * | 2014-12-10 | 2016-09-20 | Scania Cv Ab | A gearbox with a PTO clutch with integrated shaft brake |
US10029562B2 (en) | 2016-08-26 | 2018-07-24 | Deere & Company | Power take-off arrangement for work vehicle |
DE102018204910A1 (de) * | 2018-03-29 | 2019-10-02 | Zf Friedrichshafen Ag | Nebenabtriebsanordnung |
DE102019203238A1 (de) * | 2019-03-11 | 2020-09-17 | Zf Friedrichshafen Ag | Hydrauliksteuergerät für ein Getriebe |
DE102019006485A1 (de) * | 2019-09-12 | 2021-03-18 | Man Truck & Bus Se | Kraftfahrzeuggetriebe mit Nebenabtrieb |
IT202000027543A1 (it) * | 2020-11-17 | 2022-05-17 | Cnh Ind Italia Spa | Assieme di presa di potenza stagionale migliorata per un veicolo da lavoro e relativo metodo di disinnesto |
KR20230149641A (ko) * | 2022-04-20 | 2023-10-27 | 주식회사 대동 | 작업차량의 클러치 작동 및 윤활 시스템 |
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-
2005
- 2005-03-03 US US10/593,048 patent/US20080035102A1/en not_active Abandoned
- 2005-03-03 EP EP20100186973 patent/EP2273146A3/en not_active Withdrawn
- 2005-03-03 WO PCT/JP2005/003629 patent/WO2005088150A1/ja active Application Filing
- 2005-03-03 EP EP05719933A patent/EP1757834A4/en not_active Withdrawn
-
2007
- 2007-03-14 US US11/686,282 patent/US8033298B2/en not_active Expired - Fee Related
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JPH01312269A (ja) * | 1988-06-10 | 1989-12-18 | Aisin Aw Co Ltd | 車輌用自動変速機におけるリヤカバー |
JPH06147313A (ja) * | 1992-11-10 | 1994-05-27 | Kanzaki Kokyukoki Mfg Co Ltd | 作業機の駆動機構 |
JPH082267A (ja) * | 1994-06-15 | 1996-01-09 | Kanzaki Kokyukoki Mfg Co Ltd | トラクタの伝動構造 |
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JPH08156620A (ja) | 1994-12-06 | 1996-06-18 | Kanzaki Kokyukoki Mfg Co Ltd | 作業車両用の油供給装置 |
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JPH11291777A (ja) * | 1998-04-13 | 1999-10-26 | Kanzaki Kokyukoki Mfg Co Ltd | 作業車両用のトランスミッション装置 |
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Title |
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See also references of EP1757834A4 |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108626389A (zh) * | 2018-06-07 | 2018-10-09 | 陕西法士特汽车传动集团有限责任公司 | 一种商用车后取力器工作保护系统 |
CN108626389B (zh) * | 2018-06-07 | 2023-11-14 | 陕西法士特汽车传动集团有限责任公司 | 一种商用车后取力器工作保护系统 |
EP3842663A1 (en) * | 2019-12-26 | 2021-06-30 | Kubota Corporation | Work machine |
US11261584B2 (en) | 2019-12-26 | 2022-03-01 | Kubota Corporation | Work machine |
Also Published As
Publication number | Publication date |
---|---|
EP2273146A3 (en) | 2011-02-02 |
US8033298B2 (en) | 2011-10-11 |
EP2273146A2 (en) | 2011-01-12 |
EP1757834A4 (en) | 2008-07-16 |
EP1757834A1 (en) | 2007-02-28 |
US20080035102A1 (en) | 2008-02-14 |
US20070151376A1 (en) | 2007-07-05 |
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