WO2006022031A1 - 油圧リフト構造 - Google Patents
油圧リフト構造 Download PDFInfo
- Publication number
- WO2006022031A1 WO2006022031A1 PCT/JP2004/013342 JP2004013342W WO2006022031A1 WO 2006022031 A1 WO2006022031 A1 WO 2006022031A1 JP 2004013342 W JP2004013342 W JP 2004013342W WO 2006022031 A1 WO2006022031 A1 WO 2006022031A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- hydraulic
- hydraulic cylinder
- case
- oil
- lift structure
- Prior art date
Links
- 230000005540 biological transmission Effects 0.000 claims abstract description 55
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 31
- 239000003921 oil Substances 0.000 claims description 41
- 230000002708 enhancing effect Effects 0.000 abstract 1
- 239000000428 dust Substances 0.000 description 19
- 230000007246 mechanism Effects 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000009412 basement excavation Methods 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 239000003337 fertilizer Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000009331 sowing Methods 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/08—Superstructures; Supports for superstructures
- E02F9/0858—Arrangement of component parts installed on superstructures not otherwise provided for, e.g. electric components, fenders, air-conditioning units
- E02F9/0883—Tanks, e.g. oil tank, urea tank, fuel tank
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B63/00—Lifting or adjusting devices or arrangements for agricultural machines or implements
- A01B63/02—Lifting or adjusting devices or arrangements for agricultural machines or implements for implements mounted on tractors
- A01B63/10—Lifting or adjusting devices or arrangements for agricultural machines or implements for implements mounted on tractors operated by hydraulic or pneumatic means
- A01B63/1006—Lifting or adjusting devices or arrangements for agricultural machines or implements for implements mounted on tractors operated by hydraulic or pneumatic means the hydraulic or pneumatic means structurally belonging to the tractor
- A01B63/1013—Lifting or adjusting devices or arrangements for agricultural machines or implements for implements mounted on tractors operated by hydraulic or pneumatic means the hydraulic or pneumatic means structurally belonging to the tractor and being located inside the tractor body
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/627—Devices to connect beams or arms to tractors or similar self-propelled machines, e.g. drives therefor
- E02F3/6273—Devices to connect beams or arms to tractors or similar self-propelled machines, e.g. drives therefor using legs to support the beams or arms on the ground during the connecting process
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/96—Dredgers; Soil-shifting machines mechanically-driven with arrangements for alternate or simultaneous use of different digging elements
- E02F3/963—Arrangements on backhoes for alternate use of different tools
- E02F3/964—Arrangements on backhoes for alternate use of different tools of several tools mounted on one machine
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/08—Superstructures; Supports for superstructures
- E02F9/0858—Arrangement of component parts installed on superstructures not otherwise provided for, e.g. electric components, fenders, air-conditioning units
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/16—Cabins, platforms, or the like, for drivers
- E02F9/166—Cabins, platforms, or the like, for drivers movable, tiltable or pivoting, e.g. movable seats, dampening arrangements of cabins
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/2004—Control mechanisms, e.g. control levers
-
- 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
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S180/00—Motor vehicles
- Y10S180/90—Argicultural-type tractors
Definitions
- the present invention relates to a hydraulic lift structure, and more particularly, to hydraulically lift and lower a work machine in a work vehicle that can be mounted by replacing a work machine such as a knock hoe or a rotary tiller. This is related to the arrangement of the oil sump for the hydraulic oil supplied to and discharged from the cylinder case (hydraulic cylinder).
- a work vehicle such as a tractor is provided with a work machine such as a rotary tiller behind the fuselage, and is replaced with a mower, a fertilizer applicator, a sowing machine, etc. in addition to the rotary tiller depending on the work contents. It is configured so that it can be attached.
- a tractor with a rotary tiller unit or other unit at the rear of the machine or a work vehicle with a work machine at the front or rear of the machine, a front loader is installed at the front of the machine and a backhoe is installed at the rear of the machine.
- Such backhoe loaders are well known.
- the rotary tiller and the like are lifted upward so that the work machine does not touch the ground surface during normal traveling of the work vehicle, and are lowered to touch the field when performing work.
- it is configured to adjust the vertical position so that the state of the field surface and the desired tilling depth are achieved during the work.
- a hydraulic cylinder which is connected via a lift arm and moves up and down by hydraulic pressure, is usually provided above the rear part of the transmission case, and a hydraulic lift is provided.
- a structure is formed.
- a hydraulic cylinder or the like is provided in the hydraulic cylinder case, and this hydraulic cylinder case is arranged above the rear of the transmission case and below the driver's seat.
- a hydraulic cylinder case has been proposed that is detachable from the mission case (see Patent Documents 1 and 2).
- Patent Document 3 As disclosed in Patent Document 3, the hydraulic cylinder and the hydraulic valve arranged in the hydraulic cylinder case are formed in the transmission case by a hydraulic pump or the like. The hydraulic oil in the oil sump is pumped and supplied, and the return oil from this hydraulic cylinder, hydraulic valve, etc. is configured to return again into the transmission case via the hydraulic cylinder case (Patent Document). 3).
- Patent Document 1 JP-A-8-104149
- Patent Document 2 JP-A-7-39201
- Patent Document 3 Japanese Utility Model Publication No. 5-31507
- a line filter is disposed in addition to the succession filter in the oil passage for supplying and discharging the hydraulic oil. For this reason, by installing this line filter, the oil passage pressure was reduced, and the hydraulic oil temperature increased, resulting in a decrease in power transmission efficiency and a decrease in fuel consumption. Furthermore, the production cost of the work vehicle (hydraulic lift structure) was increased by arranging the line filter.
- a problem to be solved is to propose a structure for preventing the failure of a hydraulic cylinder and the like and improving the supply / discharge efficiency of hydraulic oil with respect to the hydraulic lift structure.
- the oil reservoir has a recess formed in an upper portion of the transmission case, and the hydraulic cylinder case is attached so as to cover the upper portion of the recess. .
- the oil sump is used as an oil sump for the working oil for the work implement.
- the oil reservoir for hydraulic oil for the hydraulic cylinder is provided at the boundary between the transmission case and the hydraulic cylinder case so as to be isolated from the inside of the transmission case. This prevents dust generated by the mechanical gear mechanism, etc., from entering the hydraulic cylinder case, and prevents malfunction of the hydraulic cylinder, etc. caused by powerful dust.
- a type of filter such as a line filter
- the supply and discharge efficiency of hydraulic oil can be improved.
- the oil reservoir is configured such that a recess is formed in an upper part of the transmission case, and the hydraulic cylinder case is attached so as to cover the upper part of the recess. Therefore, it is possible to reduce the manufacturing cost that does not require a separate member in the mission case and the like, and it is possible to omit the installation space for the powerful member. In addition, the dead space at the top of the mission case can be used effectively, and it also reinforces the top of the mission case.
- the oil sump is used as an oil sump for working oil for the work implement, so that dust or the like is mixed into the hydraulic equipment of the work implement. This prevents the breakdown of equipment caused by dust, etc., and prevents the oil passage pressure from being reduced by a single filter, improving the supply and discharge efficiency of hydraulic oil. In addition, since it does not mix with lubricating oil in the transmission case, the oil temperature rise can be suppressed and deterioration of the hydraulic oil can be suppressed.
- FIG. 1 is a side view showing an overall configuration of a work vehicle having a hydraulic lift structure according to the present invention.
- FIG. 2 is a plan view of the control unit.
- FIG. 3 is a schematic side view showing a power transmission system of a work vehicle.
- FIG. 4 is a partially omitted side view of the mounting portion of the backhoe and rotary tiller.
- FIG. 5 is a side view around the hydraulic lift structure.
- FIG. 6 is a rear plan view of the mounting portion of the work vehicle.
- FIG. 7 is a schematic front perspective view of a hydraulic lift structure.
- FIG. 8 is a side sectional view of FIG.
- FIG. 9 is a front perspective view of FIG. 7 with the hydraulic cylinder case removed.
- FIG. 10 is a side sectional view of FIG.
- the work vehicle 1 in the present embodiment has a front loader 2 disposed in front of the machine body and a backhoe 3 configured to be exchangeable with another work machine in the rear of the machine body.
- the work vehicle 1 is configured to be replaced with a knock ho 3 and to be provided with a rotary tiller 4 as a work machine that is lifted and lowered by a hydraulic cylinder 50 described later.
- the work vehicle 1 according to the present embodiment is configured as a knockhoe loader and is equipped with a front loader 2 and a backhoe 3 that are loading devices (hereinafter referred to as front loader 2).
- the direction in which the vehicle is disposed is the front of the work vehicle 1).
- a substantially straight airframe frame 5 (see FIGS.
- the front wheel case 8 ⁇ 8 and the rear wheel 9 ⁇ 9 are supported by the front axle case and rear axle case (not shown).
- the engine 10 is placed on the front upper part of the fuselage frame 5, and the engine 10 is mounted on the hood 11! RU
- the front loader 2 includes a bracket 12, a lift arm 13, and the like.
- the brackets 12 are disposed on the left and right sides of the bonnet 11 and are fixed to the body frame 5.
- the lift arm 13 is mounted on the bracket 12 and steers the front wheels 8 and 8 that are bent downwardly from the straight line connecting the both ends of the front and rear sides and formed in a substantially “h” shape when viewed from the side. I can move.
- a packet 14 configured to be vertically rotatable is disposed at the front end of the lift arm 13.
- the knockhoe 3 is configured to be detachable from the body frame 5, and a control box in which the excavator unit 17 including the boom bracket 15 and the boom 16, and the operation levers 23 are disposed.
- An operating device unit 19 composed of 18 etc. is connected via a machine frame 20.
- the machine frame 20 is formed with a mounting portion 20a protruding toward the front of the machine body (see FIG. 4 (a)), and is detachably attached to the machine body (such as the machine body frame 5) via the attachment part 20a.
- outriggers 24 for grounding to the ground and fixing the position of the work vehicle 1 when excavation work by the backhoe 3 is performed. When the excavation work by the knock ho 3 is not performed, the outrigger 24 is supported and fixed by swinging upward with the connecting portion with the machine frame 20 as the swing center.
- the excavator 17 has a configuration in which a boom bracket 15 projects from the end of the machine frame 20 toward the rear of the fuselage frame 5, and the boom bracket 15 rotates to the left and right with respect to the machine frame 20. It is pivoted as much as possible.
- a boom bracket 15 has a base portion of a boom 16 formed in a substantially “ ⁇ ” shape when viewed from the side, and is pivotally supported so that it can pivot back and forth.
- a pair of left and right hydraulic cylinders 21 are provided between the boom 16 and the machine casing 20. ⁇ 21 are arranged side by side. These hydraulic cylinders 21 and 21 are alternately expanded and contracted Thus, the boom 16 can be swung left and right with respect to the machine casing 20.
- a packet 22 that is a work attachment is pivotally supported at the tip of the boom 16 so as to be pivotable back and forth.
- the operation device unit 19 is configured such that a control box 18 is disposed on the machine frame 20 and in a forward direction from the boom bracket 15, and the backhoe 1 is operated up, down, left and right above the control box 18.
- Operation levers 23 and 23 are projected. By operating these operating levers 23 and 23, pressure oil is supplied to the hydraulic cylinders 25 and 25 arranged on the boom 16 so that the boom 16 and the like can be controlled to swing. It is configured.
- an operating lever 26, 26 for operating the outrigger 24 is projected on the front side of the control box 18.
- an operating lever 26, 26 for operating the outrigger 24 is projected.
- the hydraulic cylinder of the outrigger 24 is controlled to control the outrigger 24. It is configured so that 24 can be swung up and down.
- Step 30 is mounted substantially horizontally with respect to the fuselage frame 5 at the front and rear center of the fuselage frame 5.
- a driver's seat 31 is disposed at the upper rear of the step 30 and 4 above the driver's seat 31.
- a canopy 32 supported by a frame of books is provided.
- the driver's seat 31 is configured to freely change its posture in the front-rear direction, and by rotating the driver's seat 31 back and forth, the operator can operate the front loader 2 and backhoe 3 mounted on the front and rear of the aircraft while sitting in the driver's seat 31. (See Fig. 2). Below the driver's seat 31, an upper part of a mission case 42, which will be described later, is disposed!
- a dashboard 33 is erected in front of the step 30, and a steering handle 34 for steering operation projects from the dashboard 33.
- On the side of the driver's seat 31 is an operation lever part 35a for loader work, an accelerator lever 35b and a sub-shifting lever 35c. It has been.
- the driver's seat 31 faces the front side, the steering handle 34 is operated, and the airframe is steered.
- the operator controls the front loader 2 by operating the work lever 35 a and the like of the operating device section 36 while keeping the driver's seat 31 as it is (forward movement state).
- the driver's seat 31 rotates backward 180 degrees and configure the rear of the aircraft.
- the back lever 3 and the outrigger 24 are operated by operating the control lever 23 and the like protruding from the control box 18 of the control device section 19 formed.
- the engine 10 is horizontally supported between the left and right fuselage frames, and a clutch housing 40 and an HST case 41 are sequentially provided behind the engine 10 as a traveling drive system.
- mission case 42 is connected.
- the HST case 41 constitutes a main transmission by installing a hydraulic continuously variable transmission (not shown) that also has a hydraulic pump and hydraulic motor power, but it can also be placed in a transmission case. It is also possible to configure the main transmission as a stepped gear meshing type or a hydraulic clutch type.
- the transmission case 42 is equipped with an auxiliary transmission, PTO transmission, differential gear, etc. (not shown).
- the front wheel transmission shaft 44 that transmits the driving force to the front axle case protrudes from the front, and the work machine from the rear.
- the PTO shaft 56 for driving is projected.
- the output shaft (not shown) of the engine 10 is projected rearward of the aircraft, and a powerful output shaft is installed in the front and rear direction of the aircraft via a main clutch or damper in the clutch housing 40. It is connected continuously.
- This universal joint 43 is connected to the transmission shaft (not shown) at the rear of the fuselage, and the transmission shaft is linked to the hydraulic continuously variable transmission in the HST case 41 and the gear transmission (not shown) in the transmission case 42. It is connected.
- the drive of the engine 10 is transmitted from the output shaft of the engine 10 to the transmission shaft via the universal joint 43, and this transmission shaft force is transmitted from the transmission case 42 in the rear axle case 45.
- the rear wheel 9 is driven by being transmitted to the axle (not shown).
- the rotation through the hydraulic continuously variable transmission in the HST case 41 is transmitted to the differential (not shown) in the front axle case via the front wheel transmission shaft 44 to drive the front wheels 8. It has been.
- the work vehicle 1 in the present embodiment is configured so that the backhoe 3 can be installed by replacing it with another work machine as described above.
- the case where the knock hoe 3 is disposed and the case where the rotary cultivator 4 is disposed instead of the back hoe 3 will be described in comparison.
- Work that can be replaced with Knock Ho 3 As a machine, in addition to the rotary tiller 4, a forklift, a multi-work machine, and a fertilizer sowing work machine can be attached.
- the backhoe 3 when the backhoe 3 is disposed at the rear of the machine body, the backhoe 3 has a part of the machine frame 20 protruded toward the front of the machine body.
- the mounting part 20a is fixed and attached to the rear part of the fuselage frame 5.
- the backhoe 3 rotates the driver's seat 31 backward 180 degrees, so that the operator sits on the driver's seat 31 and operates the operation lever 23 and the like disposed on the control box 18 to It is configured to operate the outrigger 24.
- Knock Ho 3 has a fixed vertical position that does not need to be moved up and down to change the vertical position of the aircraft (airframe frame 5).
- the rotary cultivator 4 when the rotary cultivator 4 is disposed at the rear of the machine body, the rotary cultivator 4 is attached to the machine body by a known mechanism. That is, the rotary cultivator 4 is disposed behind the machine body via a three-point link mechanism 54 including a top link 52 and a pair of left and right lower links 53 and 53, and is connected so as to be able to move up and down and rotate. .
- a lift arm 55 connected to a hydraulic cylinder 50 which will be described later
- a lower link 53 and 53 are connected via a rod 55a '55a and slid up and down by the hydraulic cylinder 50. It is configured to be possible.
- the rear side force of the transmission case also projects the PTO shaft 56 for driving the work machine, and the PTO shaft 56 is connected to the rotary cultivator 4 so that the rotary tiller blade 57 can be driven to rotate.
- the three-point link mechanism 54 is configured to be detachable from the machine, and may be unnecessary depending on other work machines, so that the structure can be changed as appropriate. It is also possible to use a two-point link with the top link 52 omitted.
- the hydraulic lift structure 100 swings up and down a lift arm 55 for raising and lowering a work machine attached to the rear of the machine body above the mission case 42.
- a hydraulic cylinder 50 to be operated and a hydraulic cylinder case 51 in which the hydraulic cylinder 50 is provided are integrally provided.
- the hydraulic cylinder 50 extends and contracts in the front-rear direction in conjunction with the piston rod 60 between the hydraulic cylinder case 51 and the arm shaft 59 pivotally supported in the left-right direction. It is configured as follows.
- the arm shaft 59 also protrudes from the both side walls of the rear portion of the hydraulic cylinder case 51.
- the arm shaft 59 is a powerful projecting portion, and the base of the lift arm 55 is fixed to the left and right ends of the arm shaft 59.
- the lift arm 55 is swung up and down via the arm shaft 59.
- An oil sump 62 for storing the hydraulic oil supplied to and discharged from the hydraulic cylinder 50 is formed at the boundary between the hydraulic cylinder case 51 and the transmission case 42 so as to be isolated from the inside of the transmission case 42.
- a recess 58 that is recessed in a substantially rectangular shape in plan view is formed in the upper part of the mission case 42, and an oil reservoir 62 that stores hydraulic oil of the hydraulic cylinder 50 is formed in the recess 58. That is, the oil sump 62 is arranged so as to face the upper space of the mission case 42.
- the hydraulic cylinder case 51 is disposed so as to be in close contact with the outer edge portion of the recess 58 so as to cover the upper portion of the recess 58, and the contact surface force is not leaked.
- the hydraulic cylinder case 51 is screwed with a bolt or the like through a rubber packing or the like at a contact portion with the transmission case 42, but the mounting means is not limited to this.
- the hydraulic cylinder case 51 is disposed in contact with the upper surface of the mission case 42, so that the inside of the hydraulic cylinder case 51 and the inside of the mission case 42 do not communicate with each other.
- the hydraulic cylinder case 51 has an opening 51a that opens downward, and the opening 51a is open to the oil reservoir 62 formed in the recess 58 at the top of the mission case 42.
- the force is communicated with the oil sump 62 through the opening 51a.
- the inside of the mission case 42 is isolated from the oil sump 62 by the upper surface.
- the hydraulic oil stored in the oil reservoir 62 is supplied to and discharged from the hydraulic cylinder 50 and supplied for the expansion and contraction operation of the piston rod 60. In this way, the oil reservoir 62 prevents the hydraulic oil stored in the oil reservoir (not shown) formed in the mission case 42 from being supplied to the mechanisms inside the mission case 42 from being mixed. 42 It is configured separately from the inside.
- the hydraulic lift structure 100 has the hydraulic oil reservoir 62 for the hydraulic cylinder 50 separated from the inside of the transmission case 42 at the boundary between the transmission case 42 and the hydraulic cylinder case 51. Therefore, the hydraulic oil for the hydraulic cylinder 50 can be stored without being mixed with the hydraulic oil for each mechanism in the transmission case 42. For this reason, dust generated by the mechanical gear mechanism that constitutes the transmission case 42 is not removed from the hydraulic cylinder case. It is possible to prevent the hydraulic cylinder 50 from malfunctioning due to dust and the like. In addition, it is not necessary to arrange a class of filters (such as a line filter) for removing dust and the like in the hydraulic oil path that is supplied to and discharged from the hydraulic cylinder case 51.
- a class of filters such as a line filter
- the hydraulic cylinder case 51 when the hydraulic cylinder case 51 is removed from the mission case 42, the hydraulic cylinder case 51 can be easily attached and detached without the need for draining the oil from the hydraulic cylinder case 51, and the maintainability is improved.
- the hydraulic lift structure 100 forms a recess 58 in the upper part of the transmission case 42 as the oil reservoir 62, so that a separate member such as the hydraulic cylinder 50 is used for the transmission case 42 and the like.
- the manufacturing cost can be reduced because there is no need to install a separate hydraulic oil tank, and the installation space for the hydraulic oil tank can be omitted.
- the hydraulic cylinder case 51 is mounted so as to cover the upper part of the recess 58, the hydraulic oil in the oil sump 62 does not leak out of the machine and dust particles outside the machine enter the oil sump 62. Can be easily prevented.
- the hydraulic oil stored in the oil sump 62 is isolated from the inside of the mission case 42, that is, provided inside the mission case 42.
- the hydraulic oil By configuring the hydraulic oil to be distinguished from the hydraulic fluid supplied to and discharged from a mechanical gear mechanism or the like, dust particles and the like are prevented from entering the hydraulic cylinder case 51. For this reason, such hydraulic oil is not only supplied to and discharged from the hydraulic cylinder 50 in the hydraulic cylinder case 51, but is used for operation of, for example, a work machine (backhoe 3 or rotary tiller 4) disposed behind the machine body.
- oil sump 62 as a hydraulic oil sump for work equipment prevents dust from entering the hydraulic equipment of the work equipment, preventing equipment failures caused by dust, etc. This prevents the oil passage pressure from being reduced by improving the oil supply and discharge efficiency.
- the hydraulic lift structure 100 can be removed when a working machine that does not require the lifting operation by the hydraulic cylinder 50 is provided. It is configured so that it can.
- the cap member 61 is also fitted with the upward force in the recess 58, and this It is configured to close up.
- the cap member 61 is formed in a substantially rectangular shape in plan view so that the upper surface is flat.
- a rubber packing or the like is interposed at a contact portion with the transmission case 42 and is screwed with a bolt or a bolt. Is done.
- the hydraulic cylinder 50 or the like that does not require the hydraulic cylinder 50 or the like to be disposed above the mission case 42 is used.
- the recess 58 is configured to be closed with a cap member 61 such as a plate, so that the hydraulic oil in the oil sump 62 leaks out or dust outside the machine. Can be prevented.
- the present invention prevents the entry of dust dust into the hydraulic cylinder case, which necessitates the arrangement of a filter for removing dust, and is widely used in work vehicles. It can be used to prevent malfunctions and improve maintainability.
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Environmental Sciences (AREA)
- Lifting Devices For Agricultural Implements (AREA)
- Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
- General Details Of Gearings (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04773024A EP1795061B1 (en) | 2004-08-24 | 2004-09-14 | Hydraulic lift structure |
DE602004022879T DE602004022879D1 (de) | 2004-08-24 | 2004-09-14 | Hydraulische hebestruktur |
US11/574,227 US7775151B2 (en) | 2004-08-24 | 2004-09-14 | Hydraulic lift structure |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004244294A JP4206373B2 (ja) | 2004-08-24 | 2004-08-24 | 油圧リフト構造 |
JP2004-244294 | 2004-08-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006022031A1 true WO2006022031A1 (ja) | 2006-03-02 |
Family
ID=35967254
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/013342 WO2006022031A1 (ja) | 2004-08-24 | 2004-09-14 | 油圧リフト構造 |
Country Status (5)
Country | Link |
---|---|
US (1) | US7775151B2 (ja) |
EP (1) | EP1795061B1 (ja) |
JP (1) | JP4206373B2 (ja) |
DE (1) | DE602004022879D1 (ja) |
WO (1) | WO2006022031A1 (ja) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4667142B2 (ja) * | 2005-07-05 | 2011-04-06 | ヤンマー株式会社 | 旋回作業車 |
KR102496020B1 (ko) | 2015-08-03 | 2023-02-06 | 주식회사 대동 | 트랙터의 작업기 승강장치 |
CN112455221A (zh) * | 2019-11-12 | 2021-03-09 | 丰疆智能科技股份有限公司 | 拖拉机、后桥动力输出装置以及拖拉机的工作方法 |
JP7265777B2 (ja) * | 2020-04-03 | 2023-04-27 | 株式会社ササキコーポレーション | 作業機 |
JP7306699B2 (ja) * | 2020-04-03 | 2023-07-11 | 株式会社ササキコーポレーション | 作業機 |
KR20230149608A (ko) | 2022-04-20 | 2023-10-27 | 주식회사 대동 | 작업차의 승강암 헌팅 방지를 위한 제어 장치 및 방법 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5348808A (en) * | 1976-10-13 | 1978-05-02 | Kubota Ltd | Hydraulic power arm of tractor |
JPS6086670U (ja) * | 1984-08-15 | 1985-06-14 | 株式会社 神崎高級工機製作所 | 走行作業車における油供給装置 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3156156A (en) | 1958-09-08 | 1964-11-10 | Renault | Hydraulic lifting devices of tractors |
US3103147A (en) * | 1959-12-23 | 1963-09-10 | Renault | Hydraulic lifting devices for tractors |
DE1934087A1 (de) | 1969-07-04 | 1971-01-14 | Anton Schlueter Fa | Verfahren zur Verbesserung der Rad-Bodenhaftung bei einem Schlepper fuer landwirtschaftliche Bodenbearbeitungsgeraete |
ES8606700A1 (es) | 1983-08-12 | 1986-04-16 | Commercial Guardian Inc | Aparato suministrador y receptor de efectivo |
JPS62297511A (ja) | 1986-06-17 | 1987-12-24 | Honda Motor Co Ltd | 作業用車両の油圧装置 |
JPH0771893B2 (ja) | 1988-07-14 | 1995-08-02 | 株式会社クボタ | 作業車の給油構造 |
-
2004
- 2004-08-24 JP JP2004244294A patent/JP4206373B2/ja not_active Expired - Fee Related
- 2004-09-14 DE DE602004022879T patent/DE602004022879D1/de not_active Expired - Lifetime
- 2004-09-14 US US11/574,227 patent/US7775151B2/en not_active Expired - Fee Related
- 2004-09-14 WO PCT/JP2004/013342 patent/WO2006022031A1/ja active Application Filing
- 2004-09-14 EP EP04773024A patent/EP1795061B1/en not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5348808A (en) * | 1976-10-13 | 1978-05-02 | Kubota Ltd | Hydraulic power arm of tractor |
JPS6086670U (ja) * | 1984-08-15 | 1985-06-14 | 株式会社 神崎高級工機製作所 | 走行作業車における油供給装置 |
Non-Patent Citations (1)
Title |
---|
See also references of EP1795061A4 * |
Also Published As
Publication number | Publication date |
---|---|
US20080250917A1 (en) | 2008-10-16 |
US7775151B2 (en) | 2010-08-17 |
JP4206373B2 (ja) | 2009-01-07 |
DE602004022879D1 (de) | 2009-10-08 |
JP2006061024A (ja) | 2006-03-09 |
EP1795061A1 (en) | 2007-06-13 |
EP1795061B1 (en) | 2009-08-26 |
EP1795061A4 (en) | 2008-07-16 |
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