CN104488388A - Lifting force generating device and tractor adopting lifting force generating device - Google Patents
Lifting force generating device and tractor adopting lifting force generating device Download PDFInfo
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- CN104488388A CN104488388A CN201410842304.2A CN201410842304A CN104488388A CN 104488388 A CN104488388 A CN 104488388A CN 201410842304 A CN201410842304 A CN 201410842304A CN 104488388 A CN104488388 A CN 104488388A
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Abstract
The invention discloses a lifting force generating device and a tractor adopting the lifting force generating device. The lifting force generating device comprises an outer casing, a lifting shaft, an outer lifting arm, a main oil cylinder and an auxiliary oil cylinder, wherein the lifting shaft is rotationally arranged on the outer casing, the outer lifting arm is arranged on the lifting shaft, the main oil cylinder is used for generating acting force on the lifting shaft, and the auxiliary oil cylinder is used for generating acting force on the outer lifting arm. The lifting force generating device has the advantages that the auxiliary oil cylinder is additionally added and is matched with the main oil cylinder, so the lifting force can be greatly increased, when the horsepower of the tractor is increased, an underpan does not need to be replaced, the outer casing of a lifter does not need to be developed again, and the developing difficulty and the developing cost are greatly reduced.
Description
Technical field
The invention belongs to agricultural machinery technological field, specifically, the present invention relates to a kind of lifting force generation device and there is its tractor.
Background technology
Tractor, in the process used, needs the farm implements of being pulled by rear tractor with lifter promote or fall, to utilize farm implements to carry out operation.At present, in China, on small-horsepower wheel-type tractor, the main one that adopts partly splits lifter, its structure is simple, comprise the outer lift arm and interior lift arm that are linked together by lifting arm axle, be hinged on the piston rod on interior lift arm, piston rod is connected on the piston of hydraulic cylinder, hydraulic cylinder is arranged in the lifter housing of sealing, hydraulic oil is filled in lifter housing, the side fixed installation reversal valve of lifter housing, two oil-outs on reversal valve are connected respectively to lifting oil-in on hydraulic cylinder and decline oil-in, the bottom of lifter housing is connected to the oil-in of hydraulic pump by pipeline.
Tractor horsepower is larger requires that lifting force is larger, and the lifter of said structure, while horsepower promotes, as improved lifting force, then needs to increase cylinder diameter, increase housing, and then needs tractor chassis to strengthen, but so greatly increase development difficulty and cost.
Summary of the invention
The invention provides a kind of lifting force generation device and have its tractor, object improves the lifting force size produced.
To achieve these goals, the technical scheme that the present invention takes is: lifting force generation device, comprise shell body, the rotary setting lift shaft on shell body, be located at the outer lift arm in lift shaft and the master cylinder for producing active force to lift shaft, also comprise the auxiliary cylinder for producing active force to described outer lift arm.
Described master cylinder is located at the inside of described shell body.
Lifting force generation device also comprises and is located in described lift shaft and is positioned at the lift arm of described shell body inside, and piston rod and the interior lift arm of described master cylinder are rotationally connected.
Described interior lift arm is connected with described lift shaft by spline.
Described outer lift arm is connected with described lift shaft by spline.
Described outer lift arm is provided with two altogether, and two outer lift arms are connected with one end of described lift shaft respectively.
Described auxiliary cylinder is provided with two altogether, and two auxiliary cylinders parallel and outer lift arm described with is connected respectively.
Described shell body inside is provided with the oil circuit making hydraulic oil enter described master cylinder, and the oil circuit of shell body is also connected with petroleum pipeline by three-way connection body with described two auxiliary cylinders.
Lifting force generation device also comprises the distributor of the distribution for oil circuit control, and the oil-in of distributor is connected with gear pump, and oil-out is connected with described auxiliary cylinder and described master cylinder.
Described distributor is arranged on described shell body.
Described distributor is reversal valve, and the spool of distributor is also connected with one for controlling the control stick of spool movement.
The feedback mechanism for limiting outer lift arm maximum lift position and minimum lift position is provided with between described outer lift arm and described control stick.
Described feedback mechanism comprises the limited block that is located on described outer lift arm and is rotationally connected with described control stick and the feedback pull bar driven by limited block, and control stick rotary setting is on described shell body.
Described limited block is provided with the through hole allowing described feedback pull bar pass, feedback pull bar on and be provided with the first locking nut and the second locking nut, the first locking nut and the second locking nut lay respectively at the side of limited block.
Lifting force generation device also comprises the oil cylinder erection support for being connected with tractor rear axle housing, and upper end and the described outer lift arm of described auxiliary cylinder are rotationally connected, and lower end and oil cylinder erection support are rotationally connected.
Present invention also offers a kind of tractor, comprise above-mentioned lifting force generation device.
Lifting force generation device of the present invention, by setting up auxiliary cylinder, matches with master cylinder, greatly can increase lifting force, if increase tractor horsepower so just not need to change chassis, also need not again develop lifter shell body, greatly reduce development difficulty and cost.
Accompanying drawing explanation
This specification comprises the following drawings, shown content respectively:
Fig. 1 is the front view of lifting force generation device of the present invention;
Fig. 2 is the vertical view of lifting force generation device of the present invention;
Fig. 3 is the interior schematic diagram of lifting force generation device of the present invention;
Fig. 4 is hydraulic system principle figure;
Fig. 5 is the structural representation of feedback mechanism;
Be labeled as in figure:
1, shell body; 2, three-way connection body; 3, petroleum pipeline; 4, distributor; 5, control stick; 6, pull bar is fed back; 7, right redundant oil cylinder; 8, left redundant oil cylinder; 9, right outside lift arm; 10, left outside lift arm; 11, oil cylinder erection support; 12, interior lift arm; 13, lift shaft; 14, master cylinder; 15, gear pump; 16, choke valve; 17, the first locking nut; 18, the second locking nut; 19, limited block; 20, rotating shaft.
Embodiment
Contrast accompanying drawing below, by the description to embodiment, be described in further detail the specific embodiment of the present invention, object helps those skilled in the art to have more complete, accurate and deep understanding to design of the present invention, technical scheme, and contribute to its enforcement.
As shown in Figure 1 to Figure 3, the invention provides a kind of lifting force generation device, is be arranged on tractor, promotes for the farm implements of being pulled by rear tractor or falls, to utilize farm implements to carry out operation.This lifting force generation device comprises shell body 1, the rotary setting lift shaft 13 on shell body 1, is located at the outer lift arm in lift shaft 13 and the master cylinder 14 for producing active force to lift shaft 13, shell body 1 is for being connected with tractor rear axle housing upper, this lifting force generation device is made to be installed on tractor, outer lift arm is used for being connected with the lifting arm of tractor mounnted frame, master cylinder 14 pairs of lift shaft 13 produce active force, lift shaft 13 is rotated, lift shaft 13 drives outer lift arm to rotate simultaneously, realizes lifting or the decline of farm implements.This lifting force generation device also comprises the auxiliary cylinder producing active force for external lift arm, auxiliary cylinder matches with master cylinder 14, greatly can increase lifting force, if increase tractor horsepower so just not need to change chassis, also lifter shell body 1 be need not again develop, development difficulty and cost greatly reduced.
Specifically, as shown in Figure 3, master cylinder 14 is fixed on the inside of shell body 1, and is horizontal setting.Lift shaft 13 is installed in the installing hole of shell body 1, can freely rotate by opposite shell body 1, and the axis of master cylinder 14 and the axis of lift shaft 13 are perpendicular.
As shown in Figure 3, this lifting force generation device also comprises and is located in lift shaft 13 and is positioned at the lift arm 12 of shell body 1 inside, one end of interior lift arm 12 is fixedly connected with lift shaft 13, the other end is connected by the piston rod rotation of bearing pin with master cylinder 14, the piston rod of master cylinder 14 makes stretching motion, interior lift arm 12 can be swung back and forth, and interior lift arm 12 drives lift shaft 13 to rotate simultaneously.
The outer lift arm of this lifting force generation device is at least provided with one, and the end of lift shaft 13 is stretched out from the installing hole in shell body 1, and the rear end of outer lift arm is connected with the end of lift shaft 13, and front end is used for being connected with the farm implements that machine drawing rear is pulled.
The auxiliary cylinder of this lifting force generation device is also at least provided with one, the upper end of the piston rod of auxiliary cylinder is rotationally connected by bearing pin and outer lift arm, the cylinder body lower end of auxiliary cylinder is rotationally connected by bearing pin and oil cylinder erection support 11, and auxiliary cylinder freely can rotate relative to oil cylinder erection support 11.Oil cylinder erection support 11 is installed on tractor rear axle housing, and be positioned at the below of shell body 1.
As preferably, as depicted in figs. 1 and 2, outer lift arm is provided with two altogether, be respectively the left outside lift arm 10 be positioned on the left of shell body 1 and the right outside lift arm 9 be positioned on the right side of shell body 1, left outside lift arm 10 and right outside lift arm 9 parallel, the two ends, left and right of lift shaft 13 are stretched out respectively from the installing hole in shell body 1, and left outside lift arm 10 is connected with one end of lift shaft 13 respectively with the rear end of right outside lift arm 9.Auxiliary cylinder is also provided with two, be respectively the left redundant oil cylinder 8 be positioned on the left of shell body 1 and the right redundant oil cylinder 7 be positioned on the right side of shell body 1, left redundant oil cylinder 8 and right redundant oil cylinder 7 parallel, the piston rod upper end of left redundant oil cylinder 8 is connected with left outside lift arm 10, and the piston rod upper end of right redundant oil cylinder 7 is connected with right outside lift arm 9.
As preferably, outer lift arm and interior lift arm 12 are all be connected with lift shaft 13 by spline, correspondingly in lift shaft 13, are provided with external splines, and the end of lift arm and interior lift arm 12 is provided with internal spline outside.Outer lift arm and interior lift arm 12 pass through spline joint with lift shaft 13, can achieve a fixed connection on the one hand, on the other hand by regulating spline joint position, the relative angle between outer lift arm and interior lift arm 12 can be regulated, being used for ensureing the synchronism of lifting process.
This lifting force generation device is by hydraulic oil cylinder driving, belongs to a kind of hydraulic rockshaft, and its power is provided by the gear pump 15 be connected with tractor engine.As shown in Figure 4, this hydraulic system comprises the distributor 4 be connected with gear pump 15 to the hydraulic system of this lifting force generation device, and the oil-in of distributor 4 is connected with gear pump 15 by pipeline, and oil-out is connected with auxiliary cylinder and master cylinder 14 by pipeline.Distributor 4 is installed on the side of shell body 1, is used for the distribution of oil circuit control, and is realized by manipulation control stick 5.Distributor 4 is reversal valve, control stick 5 is connected with the spool of reversal valve, moving for controlling spool, driving the spool in distributor 4 to change by controlling control stick 5, and then hydraulic oil is introduced respectively the master cylinder 14 being positioned at shell body 1 inside and the auxiliary cylinder being positioned at shell body 1 outside.
As shown in Figure 1, feedback mechanism is provided with outside between lift arm and control stick 5, maximum lift position and the minimum lift position of outer lift arm can be limited, as shown in Figure 5, this feedback mechanism mainly by the limited block 19 be located on right outside lift arm 9, feedback pull bar 6 and be set in feedback pull bar 6 on the first locking nut 17 and the second locking nut 18 form.Limited block 19 is arranged on the end of right outside lift arm 9, and away from the rotation centerline of right outside lift arm 9, when right outside lift arm 9 rotates, limited block 19 also does axial-rotation around lift shaft 13, limited block 19 is provided with the through hole allowing feedback pull bar 6 pass, first locking nut 17 and the second locking nut 18 lay respectively at the side of limited block 19, first locking nut 17 is fixedly installed on the leading section of feedback pull bar 6, second locking nut 18 is fixedly installed on the middle position of feedback pull bar 6, the feedback rearward end of pull bar 6 and the lower end of control stick 5 are rotationally connected, control stick 5 is to be arranged at rotating shaft 20 on shell body 1 for pivot.When realizing when changing oil circuit by control stick 5 promoting, right outside lift arm 9 is carried in lift shaft 13, also do axial-rotation around lift shaft 13 with the limited block 19 of right outside lift arm 9 one, now the length of L1 is reducing gradually, when L1 is zero, namely limited block 19 contacts with the first locking nut 17, now feed back pull bar 6 and can transmit pulling force to control stick 5, control stick 5 is turned clockwise around rotating shaft 20, until return to the meta of distributor 4, thus cut-out oil circuit, the work that promotes stops; Otherwise, oil circuit direction is changed by control stick 5, when realizing declining, when L2 is zero, namely limited block 19 contacts with the second locking nut 18, and now feeding back pull bar 6 can to control stick 5 transmitting thrust, control stick 5 is rotated counterclockwise around rotating shaft 20, until return to the meta of distributor 4, thus cut off oil circuit, decline work stops.
As preferably, not only there is the spool of reversal valve in distributor 4 inside, also have overflow valve to carry out hydraulic control system pressure, avoid the parts such as the excessive damage housing of pressure, valve body, spool, oil cylinder.
As shown in Figure 4, the hydraulic oil that gear pump 15 produces enters distributor 4 via pipeline, drive distributor 4 spool to change by controlling control stick 5, and then hydraulic oil is introduced respectively the master cylinder 14 being positioned at lifter enclosure interior and the auxiliary cylinder being positioned at lifter hull outside.When lifting force generation device works, hydraulic oil can enter master cylinder 14 and auxiliary cylinder simultaneously, wherein the piston rod of master cylinder 14 produces active force can to interior lift arm 12, and auxiliary cylinder produces active force can to outer lift arm, and outer lift arm and interior lift arm 12 are all fixed in lift shaft 13, now lift arm will be lifted, the inside and outside lift arm Synchronous lifting of this process need, because the relative angle of lift arm and interior lift arm 12 needs to set in addition, change by regulating spline joint.Lift shaft 13 is rotated, and the lifting arm junction of outer like this lift arm and tractor mounnted frame will export lifting force.
As shown in Figure 2, shell body 1 inside is provided with the oil circuit making hydraulic oil enter master cylinder 14, and the oil circuit of shell body 1 is with two auxiliary cylinders and be connected with petroleum pipeline 3 by three-way connection body 2.As preferably, as shown in Figure 4, the pipeline that this lifting force generation device is also included in before shell body 1 inside enters auxiliary cylinder is provided with choke valve 16, is used for controlling to enter the hydraulic oil flow of auxiliary cylinder, also can realizes the Synchronous lifting of master cylinder 14 and auxiliary cylinder.
The lifter of prior art mainly drives hitch power for tractor provides, and enhanced feature is one of major function of tractor, for user obviously lifting force be the bigger the better.For with a type, often adopt modes such as increasing lifter housing, oil cylinder cylinder diameter to increase lifting force, but the effect that this kind of mode can reach have limitation.When lifting force does not reach user's request, user just needs the tractor adopting more high pass filter section.And lifting force generation device of the present invention increases the lifting force size of generation by the mode of setting up auxiliary cylinder, therefore the tractor of relative fraction horsepower can be better made to produce larger lifting force than traditional approach; If increase tractor horsepower, do not need to change chassis yet, need not again develop lifter housing yet, greatly reduce development cost.This lifting force generation device also has the advantage of compact conformation, low cost of manufacture; It is not fragile that master cylinder 14 and piston rod piece are positioned at lifter enclosure interior; There is feedback mechanism 6 between distributor 4 and outer lift arm, maximum lift position and the minimum lift position of lifting force generation device can be limited.
Present invention also offers a kind of tractor, comprise the lifting force generation device of said structure.The concrete structure of this lifting force generation device can refer to Fig. 1 to Fig. 4, does not repeat them here.The lifting force generation device in above-described embodiment is comprised, so it has all advantages of above-mentioned lifting force generation device due to tractor of the present invention.
Below by reference to the accompanying drawings to invention has been exemplary description.Obviously, specific implementation of the present invention is not subject to the restrictions described above.As long as have employed the improvement of the various unsubstantialities that method of the present invention is conceived and technical scheme is carried out; Or without improvement, above-mentioned design of the present invention and technical scheme directly applied to other occasion, all within protection scope of the present invention.
Claims (10)
1. lifting force generation device, comprise shell body, the rotary setting lift shaft on shell body, be located at the outer lift arm in lift shaft and the master cylinder for producing active force to lift shaft, it is characterized in that: also comprise the auxiliary cylinder for producing active force to described outer lift arm.
2. lifting force generation device according to claim 1, is characterized in that: described master cylinder is located at the inside of described shell body.
3. lifting force generation device according to claim 1 and 2, is characterized in that: also comprise and be located in described lift shaft and be positioned at the lift arm of described shell body inside, piston rod and the interior lift arm of described master cylinder are rotationally connected.
4. lifting force generation device according to claim 3, is characterized in that: described interior lift arm is connected with described lift shaft by spline.
5. lifting force generation device according to claim 3, is characterized in that: described outer lift arm is connected with described lift shaft by spline.
6. lifting force generation device according to claim 1, is characterized in that: described outer lift arm is provided with two altogether, and two outer lift arms are connected with one end of described lift shaft respectively.
7. lifting force generation device according to claim 6, is characterized in that: described auxiliary cylinder is provided with two altogether, and two auxiliary cylinders parallel and outer lift arm described with is connected respectively.
8. lifting force generation device according to claim 7, is characterized in that: described shell body inside is provided with the oil circuit making hydraulic oil enter described master cylinder, and the oil circuit of shell body is also connected with petroleum pipeline by three-way connection body with described two auxiliary cylinders.
9. lifting force generation device according to claim 1, it is characterized in that: the distributor also comprising the distribution for oil circuit control, the oil-in of distributor is connected with gear pump, and oil-out is connected with described auxiliary cylinder and described master cylinder.
10. a tractor, is characterized in that: comprise the arbitrary described lifting force generation device of claim 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410842304.2A CN104488388B (en) | 2014-12-30 | 2014-12-30 | Lift force generating apparatus and the tractor with it |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410842304.2A CN104488388B (en) | 2014-12-30 | 2014-12-30 | Lift force generating apparatus and the tractor with it |
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| Publication Number | Publication Date |
|---|---|
| CN104488388A true CN104488388A (en) | 2015-04-08 |
| CN104488388B CN104488388B (en) | 2017-09-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410842304.2A Active CN104488388B (en) | 2014-12-30 | 2014-12-30 | Lift force generating apparatus and the tractor with it |
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| CN (1) | CN104488388B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105052283A (en) * | 2015-08-04 | 2015-11-18 | 第一拖拉机股份有限公司 | Flexible connection device for tractor pressed-into-soil suspension mechanism high and low limitation control |
| CN109743917A (en) * | 2017-11-07 | 2019-05-14 | 雷沃重工股份有限公司 | Locking system, position-limit mechanism and tractor |
| CN112283181A (en) * | 2020-09-25 | 2021-01-29 | 哈尔滨工业大学 | High-power-density auxiliary boosting hydraulic cylinder for foot type robot |
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|---|---|---|---|---|
| DE1906881B2 (en) * | 1969-02-12 | 1977-06-30 | Klöckner-Humboldt-Deutz AG, 500OKoIn | HYDRAULIC LIFTING SYSTEM |
| US4582141A (en) * | 1979-02-12 | 1986-04-15 | Lely Cornelis V D | Motor vehicle with driving speed responsive to change in attachment load |
| CN2708613Y (en) * | 2004-04-27 | 2005-07-13 | 胡振海 | Four-wheel tractor lifter unit assembly and four-wheel tractor |
| CN202979614U (en) * | 2013-03-19 | 2013-06-12 | 第一拖拉机股份有限公司 | Oil cylinder built-in lifting mechanism for tractor |
| CN204518366U (en) * | 2014-12-30 | 2015-08-05 | 中联重机股份有限公司 | Lifting force generation device and there is its tractor |
-
2014
- 2014-12-30 CN CN201410842304.2A patent/CN104488388B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1906881B2 (en) * | 1969-02-12 | 1977-06-30 | Klöckner-Humboldt-Deutz AG, 500OKoIn | HYDRAULIC LIFTING SYSTEM |
| US4582141A (en) * | 1979-02-12 | 1986-04-15 | Lely Cornelis V D | Motor vehicle with driving speed responsive to change in attachment load |
| CN2708613Y (en) * | 2004-04-27 | 2005-07-13 | 胡振海 | Four-wheel tractor lifter unit assembly and four-wheel tractor |
| CN202979614U (en) * | 2013-03-19 | 2013-06-12 | 第一拖拉机股份有限公司 | Oil cylinder built-in lifting mechanism for tractor |
| CN204518366U (en) * | 2014-12-30 | 2015-08-05 | 中联重机股份有限公司 | Lifting force generation device and there is its tractor |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105052283A (en) * | 2015-08-04 | 2015-11-18 | 第一拖拉机股份有限公司 | Flexible connection device for tractor pressed-into-soil suspension mechanism high and low limitation control |
| CN109743917A (en) * | 2017-11-07 | 2019-05-14 | 雷沃重工股份有限公司 | Locking system, position-limit mechanism and tractor |
| CN109743917B (en) * | 2017-11-07 | 2024-02-06 | 潍柴雷沃智慧农业科技股份有限公司 | Locking device, limiting mechanism and tractor |
| CN112283181A (en) * | 2020-09-25 | 2021-01-29 | 哈尔滨工业大学 | High-power-density auxiliary boosting hydraulic cylinder for foot type robot |
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| Publication number | Publication date |
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| CN104488388B (en) | 2017-09-22 |
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Address after: 241080 No. 16 Emxi Road, Sanshan Economic Development Zone, Wuhu City, Anhui Province Patentee after: Zhonglian Agricultural Machinery Co.,Ltd. Address before: 241080 No.16, Anxi Road, Sanshan Economic Development Zone, Sanshan District, Wuhu City, Anhui Province Patentee before: ZOOMLION HEAVY MACHINERY Co.,Ltd. |
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