CN103125161B - Lifting device of tractor suspension system - Google Patents
Lifting device of tractor suspension system Download PDFInfo
- Publication number
- CN103125161B CN103125161B CN201110378020.9A CN201110378020A CN103125161B CN 103125161 B CN103125161 B CN 103125161B CN 201110378020 A CN201110378020 A CN 201110378020A CN 103125161 B CN103125161 B CN 103125161B
- Authority
- CN
- China
- Prior art keywords
- lower force
- piston
- lifter
- pivotal axis
- application apparatus
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Lifting Devices For Agricultural Implements (AREA)
Abstract
The invention relates to a lifting device for a tractor suspension system. The lifting device comprises a pivotal shaft (14), a lifting arm (8), a lifting drive device and a lower force application device, wherein the pivotal shaft (14) rotates around a fixed axis, the lifting arm (8) is driven by the pivotal shaft (14) to rotate, the lifting drive device can drive the pivotal shaft to rotate along a first direction, and the lower force application device can drive the pivotal shaft to rotate along a second direction opposite to the first direction. When the lifting drive device drives the pivotal shaft to rotate along the first direction, the lower force application device does not exert driving force on the pivotal shaft. When the lower force application device drives the pivotal shaft to rotate along the second direction, the lifting drive device does not exert driving force on the pivotal shaft.
Description
Technical field
The present invention relates to a kind of lifter, particularly a kind of lifter (rockshaft assembly) being used for tractor hanging (hitchassembly).Also relate to the suspension arrangement and tractor with this lifter.
Background technology
When tractor is used as the draw-gear of farm machinery, it is hang on the farm implements (agricultural implement) of this tractor or other annex provides tractive force and operation to control.Farm implements are connected with tractor by the suspension arrangement being arranged at tractor rear portion usually.
Conventional suspension arrangement is such as three-link hitch (3points hitch), and this device is used for carrying out at 3 with farm implements or other annex and is connected.
Traditional lifter only has enhanced feature, and it utilizes hydraulic cylinder to promote the height of lower link (draft link) as actuator.Because this lifter does not have lower force application apparatus (down force device), therefore when needs decline lower link, it makes lower link slowly decline by the gravity of lower link and connection annex thereon usually.This suspension arrangement can not carry out constant control to the working depth of farm implements or highly.
Some lifter employs additional two actions (2-way) hydraulic cylinder and applies downward power to lower link.But, lifter upwards action time, this two-way hydraulic cylinder needs exudate force feed in order to avoid affect the action of former lifter.This causes the complexity of hydraulic system to increase.
Therefore, there is the demand of the lower force application apparatus for suspension arrangement, this lower force application apparatus can apply downward power when needed, and this lower force application apparatus does not affect the normal operating of lifter when not needing.
Summary of the invention
The application provides a kind of lifter for tractor hanging, and this lifter comprises:
Around the pivotal axis that fixed axis rotates; Lift arm, it is driven by described pivotal axis and rotates; Lifting driving device, this lifting driving device can drive described pivotal axis to be rotated in a first direction to make this pivotal axis; And lower force application apparatus, this lower force application apparatus can drive described pivotal axis to rotate along second direction opposite to the first direction to make this pivotal axis; When described lifting driving device drives pivotal axis to rotate along first direction, described lower force application apparatus does not apply driving force to this pivotal axis; When described lower force application apparatus drives pivotal axis to rotate along second direction, described lifting driving device does not apply driving force to this pivotal axis.
On the one hand, the jigger lifting piston link assembly that this lifting driving device comprises lift crank arm and is connected with crank pivot rotary, lift crank arm is connected to described pivotal axis and relative to this pivotal axis not rotatably, described jigger lifting piston link assembly can apply the first moment of torsion to crank to make crank around the axis pivotable of pivotal axis.
On the other hand, this lower force application apparatus is additive fluid pressure cylinder assembly.
Have on the one hand, this lower force application apparatus comprise lower force cylinder body, can in cylinder body reciprocating lower force piston and lower force piston rod, this lower force cylinder body has first end and the second end, sealing-fluid pressure chamber is formed between first end and lower force piston, lower force piston rod extends to lower force application cylinder external body from the opening of the second end, wherein, the outer end of this lower force piston rod is connected to lower force crank arm, to apply the second moment of torsion to crank, this second moment of torsion is contrary with the direction of the first moment of torsion.
Again on the one hand, this lower force application apparatus also comprises piston position holding device, wherein, when this lower force application apparatus applies described second moment of torsion, fluid pressure chambers has operating pressure, lower force piston overcomes the confining force of piston position holding device and moves to the second end under the effect of operating pressure, when this lower force application apparatus does not apply described second moment of torsion, fluid pressure chambers does not have fluid pressure, and piston position holding device is back to lower force piston towards the holding position of first end and holds it in this position.
Again on the one hand, lower force piston rod is not attached to lower force piston, when this lower force application apparatus applies described second moment of torsion, lower force piston outwards moves against the inner end of lower force piston rod to promote lower force piston rod, when this lower force application apparatus does not apply described second moment of torsion, lower force piston rod together with lower force crank relative to piston freely-movable.
Again on the one hand, this piston position holding device is spring, and this spring is arranged between piston and the second end along the axial direction of cylinder body, and piston is tending towards towards the position of first end.
Again on the one hand, this spring is arranged between cylinder body and piston rod along the radial direction of cylinder body.
Again on the one hand, this spring is spiral compression spring.
Accompanying drawing explanation
Fig. 1 is the fragmentary, perspective view at the rear portion of the tractor with suspension arrangement;
Fig. 2 is the decomposition diagram of lifter, and this lifter does not have lower force application apparatus;
Fig. 3 is the diagrammatic cross-sectional view of the lifter of Fig. 2;
Fig. 4 is the cross sectional view of the lifter with lower force application apparatus.
Detailed description of the invention
Fig. 1 shows the partial view of tractor 1, and suspension arrangement 2 is arranged on the rear portion of tractor 1, for being connected with farm implements 3.Suspension arrangement 2 is such as 3 connection suspension arrangements, comprises center pull rod (center link) 4, two lower links (draft link) 5 and lifter 6.Lifter 6 comprises via raising rod (lift link) 7 lift arm be connected with lower link 5 (lift arm) 8.Lifter 6 can drive lift arm 8 to rotate to pull lower link 5 by raising rod 7, thus raises lower link 5, and raises farm implements 3 thus.
With reference to figure 2 and 3.Fig. 2 is the decomposition diagram of lifter 6 ', and this lifter does not have lower force application apparatus.Fig. 3 is the diagrammatic cross-sectional view of the lifter 6 ' of Fig. 2.
Lifter 6 ' comprises lift arm 8, housing 9 and is positioned at housing 9 for driving the drive unit of lift arm 8 pivotable.Lift arm 8 is connected to pivotal axis 14, such as, connected by spline mode, and lift arm 8 is non-rotatable relative to pivotal axis 14 thus.Namely lift arm 8 together with pivotal axis 14 around the rotation pivotable of pivotal axis 14.
In one embodiment, this drive unit piston rod part of comprising crank (crank) 10 and being connected with crank 10.Crank 10 is connected to pivotal axis (crank shaft) 14, such as, connected by spline mode.Crank 10 is non-rotatable relative to pivotal axis 14.That is, crank 10 together with pivotal axis 14 around the rotation pivotable of pivotal axis 14.This piston rod part comprises lifting connecting rod 11, jigger lifting piston 12 and promotes cylinder body 13.Promote cylinder body 13 and be connected to housing 9 rigidly.The outer end promoting connecting rod 11 is pivotally connected to the lift crank arm (crank arm) 15 of crank 10.The other end of connecting rod 11 is connected to piston 12.Jigger lifting piston 12 can be mobile in lifting cylinder body 13.
Drive unit is described below and how drives lift arm 8.When promoting the sealed chamber 16 between cylinder body 13 and jigger lifting piston 12 and being applied in operating pressure, such as by hydraulic oil or Compressed Gas, jigger lifting piston 12 is pushed outwards dynamic, promote connecting rod 11 thus to promote lift crank arm 15 and make crank 10 around pivot axis (Fig. 3) pivotable along clockwise direction of pivotal axis 14, thus the lift arm 8 be connected with pivotal axis 14 is by around pivot axis pivotable along clockwise direction, raise the union end of lift arm 8 thus.When chamber 16 is not applied in operating pressure, lift arm 8 is under the Action of Gravity Field of other coupled parts, axis around pivotal axis carries out the pivotable of rightabout (counterclockwise), crank 10 also reverse (counterclockwise) pivotable thus, promotes lifting connecting rod 11 and jigger lifting piston 12 returns lifting cylinder body 13.In this case, drive unit can not initiatively make lift arm 8 pivotable to reduce hoisting depth.
In one embodiment of this invention, lifter 6 also comprises lower force application apparatus.The union end (coupling end) that lower force application apparatus is provided for lift arm 8 highly declines.
Other parts and the lifter 6 ' of this lifter 6 are similar, and therefore same or similar parts have identical Reference numeral, and its explanation no longer repeats.
In one embodiment, as shown in Figure 4, lower force application apparatus can be additive fluid pressure cylinder 17, such as hydraulic cylinder or cylinder.Pressure cylinder 17 comprises lower force cylinder body 18, lower force piston 19 and lower force piston rod 20.Sealed chamber 22 is formed between lower force cylinder body 18 and lower force piston 19.Lower force cylinder body has the relative end 25 that end 24 that lower force piston rod 20 passes is not passed with piston rod.Lower force cylinder body 18 is connected to housing 9 rigidly.Lower force piston rod 20 is pivotally connected to the lower force crank arm 23 of crank 10.When chamber 22 is applied in operating pressure, such as by hydraulic oil or Compressed Gas, pressure cylinder 17 applies force to crank 10 by lower force piston 19 and lower force piston rod 20, make crank 10 pivotable in the counterclockwise direction, thus lift arm 8 also pivotable in the counterclockwise direction, to reduce the height of the union end of lift arm 8.
In one embodiment, under the cylinder 17 that bears on also comprise piston position holding device, this piston position holding device makes lower force piston 19 be tending towards remaining on the position towards cylinder ends 25.Instantly, when force application apparatus does not work, this piston position holding device does not interfere the regular event of lifter 6.
In one embodiment, piston position holding device is spring 21.Spring 21 is such as Compress Spring.Spring 21 is arranged between lower force cylinder body 18 and lower force piston rod 20 and along the axial direction of lower force cylinder body 18 along the radial direction of lower force cylinder body 18 and is arranged between lower force piston 19 and end 24, and lower force piston 19 is tending towards towards the position of end 25.Spring 21 can also be the spring of other form, such as extension spring.When extension spring, this spring is arranged between lower force piston 19 and end 25.
In one embodiment, lower force piston 19 be not attached to lower force piston rod 20.That is, when being applied in operating pressure in chamber 22, lower force piston 19 overcomes the spring force motion of spring 21 against lower force piston rod 20.And when removing operating pressure in chamber 22, lower force piston 19 is back to towards the position of end 25 under the effect of the tension force of spring 21, lower force piston 19 disengages with lower force piston rod 20.
According to configuration above, when chamber 22 is applied in operating pressure, pressure cylinder 17 applies force to crank 10 by lower force piston 19 and lower force piston rod 20, make crank 10 pivotable in the counterclockwise direction, thus lift arm 8 also pivotable in the counterclockwise direction, to reduce the height of the union end of lift arm 8.And when chamber 22 is by releasing operating pressure, lower force piston 19 is in the position of retraction, and be not connected with lower force piston rod 20 due to lower force piston 19, lower force piston rod 20 moves with connected crank 10.That is, in this condition, the lifter 6 of Fig. 4 works as the lifter 6 ' of Fig. 3, and lower force application apparatus does not act on crank 10, and lifter 6 ' can normal operating.
According to the lifter of the application, it can realize two kinds of duties of lifter by means of only one action pressure cylinder, namely descends force state and promotes state normally, avoids the complexity of control system and the hydraulic system adopting two displacement cylinder to cause.
Hydraulic circuit in the application and control thereof easily can be realized according to the structure of lifter and job requirement by those skilled in the art, no longer describe in detail.
Describe various feature of the present invention with example above, should be understood that these features can be used alone or in combination.
Should be appreciated that it is schematic but not determinate above, and those skilled in the art can carry out apparent amendment and can not deviate from spirit of the present invention.Therefore, scope of the present invention is determined by claims instead of explanation above.
Claims (9)
1., for a lifter for tractor hanging, this lifter comprises:
Around the pivotal axis (14) that fixed axis rotates;
Lift arm (8), it is driven by described pivotal axis and rotates;
Lifting driving device, this lifting driving device can drive described pivotal axis to be rotated in a first direction to make this pivotal axis; And
Lower force application apparatus, this lower force application apparatus can drive described pivotal axis to rotate along second direction opposite to the first direction to make this pivotal axis;
When described lifting driving device drives pivotal axis to rotate along first direction, described lower force application apparatus does not apply driving force to this pivotal axis;
When described lower force application apparatus drives pivotal axis to rotate along second direction, described lifting driving device does not apply driving force to this pivotal axis.
2. lifter as claimed in claim 1, wherein, the jigger lifting piston link assembly (11 that this lifting driving device comprises lift crank arm (15) and is connected with this lift crank arm pivotable, 12,13), lift crank arm (15) is connected to described pivotal axis and relative to this pivotal axis not rotatably, described jigger lifting piston link assembly can apply the first moment of torsion and be rotated in a first direction to make described pivotal axis to lift crank arm (15).
3. lifter as claimed in claim 1 or 2, wherein, this lower force application apparatus is additive fluid pressure cylinder assembly (17).
4. lifter as claimed in claim 3, wherein, this lower force application apparatus comprises lower force cylinder body (18), can in cylinder body reciprocating lower force piston (19), with lower force piston rod (20), this lower force cylinder body has first end and the second end, sealing-fluid pressure chamber is formed between first end and lower force piston, lower force piston rod extends to lower force application cylinder external body from the opening of the second end, wherein, the outer end of this lower force piston rod is connected to lower force crank arm (23), to apply the second moment of torsion to lower force crank arm (23), this second moment of torsion is contrary with the direction of the first moment of torsion.
5. lifter as claimed in claim 4, wherein, this lower force application apparatus also comprises piston position holding device, wherein, when this lower force application apparatus applies described second moment of torsion, fluid pressure chambers has operating pressure, lower force piston overcomes the confining force of piston position holding device and moves to the second end under the effect of operating pressure, when this lower force application apparatus does not apply described second moment of torsion, fluid pressure chambers does not have fluid pressure, piston position holding device promotes lower force piston and is back to towards the holding position of first end and holds it in this position.
6. lifter as claimed in claim 5, wherein, lower force piston rod is not attached to lower force piston, when this lower force application apparatus applies described second moment of torsion, lower force piston outwards moves against the inner end of lower force piston rod to promote lower force piston rod, when this lower force application apparatus does not apply described second moment of torsion, lower force piston rod together with lower force crank arm (23) relative to the freely-movable of lower force piston.
7. the lifter as described in any one of claim 4-6, wherein, this piston position holding device is spring (21), and this spring is arranged between lower force piston and the second end along the axial direction of lower force cylinder body, and lower force piston is tending towards towards the position of first end.
8. lifter as claimed in claim 7, this spring is arranged between lower force cylinder body and lower force piston rod along the radial direction of lower force cylinder body.
9. lifter as claimed in claim 8, wherein, this spring is spiral compression spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110378020.9A CN103125161B (en) | 2011-11-24 | 2011-11-24 | Lifting device of tractor suspension system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110378020.9A CN103125161B (en) | 2011-11-24 | 2011-11-24 | Lifting device of tractor suspension system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103125161A CN103125161A (en) | 2013-06-05 |
| CN103125161B true CN103125161B (en) | 2015-03-25 |
Family
ID=48486114
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110378020.9A Active CN103125161B (en) | 2011-11-24 | 2011-11-24 | Lifting device of tractor suspension system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103125161B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3142342A (en) * | 1961-08-14 | 1964-07-28 | Int Harvester Co | Flow control compensator |
| DE2163975A1 (en) * | 1970-12-23 | 1972-07-13 | Alex. Friedmann Kg, Wien | Device for controlling the penetration depth of a plow |
| DE1815594B2 (en) * | 1968-12-19 | 1976-08-19 | Klöckner-Humboldt-Deutz AG, 5000Köln | PILOT VALVE FOR THE HYDRAULIC POWER LIFT SYSTEM OF A FARM TRACTOR |
| DE1906880B2 (en) * | 1969-02-12 | 1977-03-10 | Klöckner-Humboldt-Deutz AG, 5000 Köln | HYDRAULIC LIFTING SYSTEM |
| CN2708613Y (en) * | 2004-04-27 | 2005-07-13 | 胡振海 | Four-wheel tractor lifter unit assembly and four-wheel tractor |
| EP1869960A1 (en) * | 2006-06-20 | 2007-12-26 | CNH Italia S.p.A. | Assembly for lifting and lowering a farm tractor-towed implement. |
| EP2071933A1 (en) * | 2007-12-21 | 2009-06-24 | Deere & Company | Rockshaft Assembly |
-
2011
- 2011-11-24 CN CN201110378020.9A patent/CN103125161B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3142342A (en) * | 1961-08-14 | 1964-07-28 | Int Harvester Co | Flow control compensator |
| DE1815594B2 (en) * | 1968-12-19 | 1976-08-19 | Klöckner-Humboldt-Deutz AG, 5000Köln | PILOT VALVE FOR THE HYDRAULIC POWER LIFT SYSTEM OF A FARM TRACTOR |
| DE1906880B2 (en) * | 1969-02-12 | 1977-03-10 | Klöckner-Humboldt-Deutz AG, 5000 Köln | HYDRAULIC LIFTING SYSTEM |
| DE2163975A1 (en) * | 1970-12-23 | 1972-07-13 | Alex. Friedmann Kg, Wien | Device for controlling the penetration depth of a plow |
| CN2708613Y (en) * | 2004-04-27 | 2005-07-13 | 胡振海 | Four-wheel tractor lifter unit assembly and four-wheel tractor |
| EP1869960A1 (en) * | 2006-06-20 | 2007-12-26 | CNH Italia S.p.A. | Assembly for lifting and lowering a farm tractor-towed implement. |
| EP2071933A1 (en) * | 2007-12-21 | 2009-06-24 | Deere & Company | Rockshaft Assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103125161A (en) | 2013-06-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20070266688A1 (en) | Agricultural machine | |
| CA2617302A1 (en) | Soil stripping device | |
| CN104554174A (en) | Vehicle windshield wiper system with energy-absorbing feature | |
| CN103125161B (en) | Lifting device of tractor suspension system | |
| CN202832690U (en) | Reciprocating driving rotary engine | |
| CN202251533U (en) | Hydraulic control main clutch device | |
| CN202026578U (en) | Hydraulic lifter of tractor | |
| EP3000298B1 (en) | Rotary tedder | |
| CN104488388B (en) | Lift force generating apparatus and the tractor with it | |
| CN203033562U (en) | Friction wheel parallel driving device | |
| US20110154920A1 (en) | Actuator with thrust flanges and laterally tiltable tool assembly using same | |
| CN204616600U (en) | Harvester working arm frame for movement | |
| CN206759978U (en) | A kind of tractor of the lifting device with high-precision control hoisting depth | |
| CN103726529A (en) | High-rigidity nine-link controllable mechanical loading mechanism | |
| CN209053040U (en) | A kind of sucker lifting device | |
| CN103782688A (en) | Trenching device of small-sized loader | |
| CN206554141U (en) | A kind of loading machine front stretching arm mechanism | |
| CN206100854U (en) | Farm tractor hydraulic rockshaft | |
| DK178281B1 (en) | Agriculture machine | |
| CN204805451U (en) | Straining device and have this straining device's combine | |
| CN204020563U (en) | Trac. | |
| CN208200246U (en) | A kind of hydraulic rockshaft | |
| CN103999590B (en) | Three-wheel field operating vehicle is pinched, sprays, is intertilled hydraulic lifting system | |
| CN202998796U (en) | Hydraulic lifting device of tractor | |
| CN217264445U (en) | Hydraulic fly jib of folding-jib lorry-mounted crane |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |