CN102217445A - Stepless speed change device of hydraulic and mechanical united controllable seeding apparatus - Google Patents

Stepless speed change device of hydraulic and mechanical united controllable seeding apparatus Download PDF

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Publication number
CN102217445A
CN102217445A CN2011101188584A CN201110118858A CN102217445A CN 102217445 A CN102217445 A CN 102217445A CN 2011101188584 A CN2011101188584 A CN 2011101188584A CN 201110118858 A CN201110118858 A CN 201110118858A CN 102217445 A CN102217445 A CN 102217445A
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CN
China
Prior art keywords
hydraulic
speed change
change device
stepless speed
seeding unit
Prior art date
Application number
CN2011101188584A
Other languages
Chinese (zh)
Inventor
李洪文
张东远
蔡国华
王庆杰
何进
苏艳波
李慧
卢彩云
李问盈
Original Assignee
中国农业大学
Priority date (The priority date 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 date listed.)
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Application filed by 中国农业大学 filed Critical 中国农业大学
Priority to CN2011101188584A priority Critical patent/CN102217445A/en
Publication of CN102217445A publication Critical patent/CN102217445A/en

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Abstract

The invention discloses a speed change device of agricultural machinery, and in particular relates to a stepless speed change device of a hydraulic and mechanical united controllable seeding apparatus. The stepless speed change device consists of a hydraulic pump (2), a one-way valve (4), a first throttling valve (5), a second throttling valve (6), a hydraulic motor (7) and an oil tank. After an output pipeline of the hydraulic pump (2) passes through the one-way valve (4), the output pipeline is divided into two parallel branches, wherein one branch passes through the first throttling valve (5) and the hydraulic motor (7) respectively and is connected to the oil tank, and the other branch passes through the second throttling valve (6) and is connected to the oil tank. A transmission shaft of the hydraulic pump (2) is connected with a driven shaft of a speed reducer (19), and a driving shaft of the speed reducer (19) is connected with an output shaft of an engine. The seeding apparatus designed by using the stepless speed change device is simple and convenient to operate, and has large speed adjusting range; the seeding speed is not limited by the travelling speed of the seeding apparatus; and the seeding apparatus has wider application range.

Description

Hydraulic machinery combined regulating formula seeding unit stepless speed change device

Technical field

The invention belongs to the agricultural machinery speed change gear, particularly relate to a kind of hydraulic machinery combined regulating formula seeding unit stepless speed change device.

Background technology

In agricultural machinery technological field, adopt chain drive or band transmission between the land wheel of general sower and the seeding unit axle, drive the rotation of seeding unit axle by the walking of land wheel, and then realize seeding operation, the sower of this transmission mode can not be realized the infinitely variable speeds of seeding unit axle.Yet, because different soil condition and different natural causes such as operating environment, different plot may need different speed of drilling, and perhaps identical plot also may need different speed of drilling, for these situations, can not well fulfil assignment based on the sower of above-mentioned seeding principle.

Stepless speed change device mainly is to regulate its operating rate in certain scope arbitrarily in order to be implemented in, and at present mechanical types that adopt wheeled as friction commonly used more, but this device is relatively stricter to the material requirements of friction pulley, and slewing range is smaller.In addition, be the belt speed change gear that 200710146265.2 " variable v-belt drives " are invented also just like the patent No., control gear ratio by the groove width that changes driving pulley and driven pulley, and then realization infinitely variable speeds, but not only slewing range is little to adopt belt wheel to carry out infinitely variable speeds, and belt wheel easily skids, and the gearratio inaccuracy is unsuitable for being used for regulating the precise sowing of seeding unit.

Summary of the invention

(1) technical problem that will solve

The technical problem to be solved in the present invention is: realize that a kind of slewing range is big, easy and simple to handle, stable performance is suitable for controlling the stepless speed change device of seeding unit precise sowing.

(2) technical scheme

In order to solve the problems of the technologies described above, the invention provides a kind of hydraulic machinery combined regulating formula seeding unit stepless speed change device, described speed change gear is made up of hydraulic pump, check valve, first throttle valve and second choke valve, hydraulic motor, fuel tank.Hydraulic pump, check valve, first throttle valve and second choke valve, hydraulic motor, fuel tank are formed hydraulic circuit, and fuel tank is supplied with the required hydraulic oil of hydraulic circuit.The output pipe of hydraulic pump is divided into two parallel branches through behind the check valve, and one of them branch road is connected to fuel tank through first throttle valve and hydraulic motor respectively, and another branch road is connected to fuel tank after through second choke valve.

The power transmission shaft of hydraulic pump links to each other with the driven shaft of decelerator, and the driving shaft of decelerator links to each other with engine output shaft, and triple gear is connected on the driven shaft of decelerator by the guiding spline.

When hydraulic work system, second choke valve places the state of closing, the output speed of engine drives hydraulic pump works after decelerator slows down, change the flow that flows into hydraulic motor by the flow area of regulating the first throttle valve, realize the variation of hydraulic motor power transmission shaft output speed, and then, finish the infinitely variable speeds operation of seeding unit by being with transmission to regulate the rotating speed of seeding unit axle.

The flow area of first throttle valve is transferred when big, and the flow that flows into hydraulic motor increases thereupon, makes the rotating speed of hydraulic motor power transmission shaft increase, and then increases by the rotating speed that the band transmission is delivered to the seeding unit axle, and the amount of seed metering of seeding unit increases; In like manner, when the flow area of first throttle valve was turned down, the rotating speed of seeding unit axle reduced, and the seeding unit amount of seed metering reduces.

When hydraulic system was not worked, second choke valve placed normally open, and be back to fuel tank owing to the characteristic of check valve makes hydraulic oil not enter hydraulic pump this moment.

(3) beneficial effect

Technique scheme has following advantage: the seeding speed of sower is not subject to the speed of travel of sower, and range of application is wider; Simple to operation, speed adjustable range is big, effective; Applicability is strong, on the sower that can be applied to be complementary with various farming patterns.

Description of drawings

Fig. 1 is an embodiment of the invention fundamental diagram;

Fig. 2 is embodiment of the invention pulley transmission structure figure.

Wherein, 1: fuel tank; 2: hydraulic pump; 3: filter; 4: check valve; 5: the first throttle valve; 6: the second choke valves; 7: hydraulic motor; 8: sequence valve; 9: fuel tank; 10: the first shaft couplings; 11: seeding unit; 12: the seeding unit axle; 13: the first belt pulleys; 14: belt; 15: band transmission regulating wheel; 16: the second belt pulleys; 17: the hydraulic motor power transmission shaft; 18: triple gear; 19: decelerator; 20: the second shaft couplings.

Embodiment

Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples are used to illustrate the present invention, but are not used for limiting the scope of the invention.

The hydraulic machinery combined regulating formula seeding unit stepless speed change device of present embodiment is made up of hydraulic pump 2, filter 3, check valve 4, sequence valve 8, first throttle valve 5 and second choke valve 6, axial-piston hydraulic motor 7, fuel tank 1 and 9, hydraulic motor power transmission shaft 17, first belt pulley 13 and second belt pulley 16, belt 14, seeding unit axle 12, seeding unit 11, band transmission regulating wheel 15, first shaft coupling 10 and second shaft coupling 20, triple gear 18 and decelerator 19 etc.Hydraulic pump 2, filter 3, check valve 4, sequence valve 8, first throttle valve 5 and second choke valve 6, axial-piston hydraulic motor 7, fuel tank 1 and 9 are formed hydraulic circuit: after the output pipe of hydraulic pump 2 successively passes through filter 3 and check valve 4, be divided into two parallel branches, one of them branch road is connected to fuel tank through first throttle valve 5 and hydraulic motor 7 respectively, and another branch road is connected to fuel tank after through second choke valve 6; Sequence valve 8 is in parallel with hydraulic motor 7 place branch roads.Axial-piston hydraulic motor 7 is a fixed displacement motor, and the motor displacement value is certain, by regulating the hydraulic fluid flow rate that flows into axial-piston hydraulic motor 7, just can change the rotating speed of axial-piston hydraulic motor power transmission shaft 17.

First belt pulley 13 and second belt pulley 16 are connected on seeding unit axle 12 and the hydraulic motor power transmission shaft 17 by flat key respectively, first belt pulley 13 is connected by belt 14 with second belt pulley 16, and hydraulic pump power transmission shaft and tractor output shaft are connected on the driven shaft and driving shaft of decelerator 19 by first shaft coupling 10 and second shaft coupling 20 respectively.There is triple gear 18 decelerator 19 inside, and triple gear 18 is connected on the driven shaft of decelerator 19 by the guiding spline.

In the foregoing description hydraulic machinery combined regulating formula seeding unit stepless speed change device in, between first belt pulley 13 and second belt pulley 16 regulating wheel 15 is installed also, regulating wheel 15 can prevent to be with transmission slip, thereby guarantees the infinitely variable speeds effect of package unit.

During operation, the rotating speed of tractor motive power output shaft is delivered on the hydraulic pump power transmission shaft by decelerator 19, mesh with gear I, II, III respectively by the axially-movable of regulating triple gear 18, can realize the step speed change of three class of mechanical system, and then the input speed of change hydraulic pump power transmission shaft, regulate the hydraulic fluid flow rate that flows into hydraulic circuit.When hydraulic work system, second choke valve 6 places the state of closing, the power output speed of tractor drives hydraulic pump 2 work after decelerator 19 slows down, change the flow that flows into constant displacement hydraulic motor 7 by the flow area of regulating first throttle valve 5, realize the variation of hydraulic motor power transmission shaft 17 output speeds, and then be delivered to the rotating speed of the seeding unit axle 12 of sower with adjusting seeding unit axle 12 by the band transmission, finish the infinitely variable speeds operation of seeding unit 11; When hydraulic system was not worked, second choke valve 6 placed normally open, and be not back to mailbox 9 owing to hydraulic oil like the characteristic of check valve 4 does not enter hydraulic pump this moment.In addition, when the loop hydraulic fluid pressure was too high, sequence valve 8 had the function of protection hydraulic pump 2.

As can be seen from the above embodiments, the embodiment of the invention realizes the infinitely variable speeds of seeding unit being suitable for the sower that multiple seeding unit rotates sowing by the mode that adopts hydraulic pressure and mechanical linkage.

The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the technology of the present invention principle; can also make some improvement and replacement, these improvement and replacement also should be considered as protection scope of the present invention.

Claims (8)

1. hydraulic machinery combined regulating formula seeding unit stepless speed change device, form by hydraulic pump (2), check valve (4), first throttle valve (5), second choke valve (6), hydraulic motor (7), fuel tank, it is characterized in that, behind the output pipe process check valve (4) of hydraulic pump (2), be divided into two parallel branches, one of them branch road passes through first throttle valve (5) respectively and hydraulic motor (7) is connected to fuel tank, and another branch road is connected to fuel tank after through second choke valve (6).
2. hydraulic machinery combined regulating formula seeding unit stepless speed change device as claimed in claim 1 is characterized in that described hydraulic motor (7) is an axial-piston hydraulic motor.
3. hydraulic machinery combined regulating formula seeding unit stepless speed change device as claimed in claim 1, also comprise filter (3) and sequence valve (8), it is characterized in that, described filter (3) is positioned between hydraulic pump (2) and the check valve (4), and described sequence valve (8) is in parallel with hydraulic motor (7) place branch road.
4. hydraulic machinery combined regulating formula seeding unit stepless speed change device as claimed in claim 1, also comprise decelerator (19), it is characterized in that the power transmission shaft of hydraulic pump (2) links to each other with the driven shaft of decelerator (19), the driving shaft of decelerator (19) links to each other with engine output shaft.
5. hydraulic machinery combined regulating formula seeding unit stepless speed change device as claimed in claim 4 is characterized in that triple gear (18) is arranged in the decelerator (19), and triple gear (18) is connected on the driven shaft of decelerator (19) by the guiding spline.
6. hydraulic machinery combined regulating formula seeding unit stepless speed change device as claimed in claim 5 is characterized in that the power transmission shaft of hydraulic pump (2) is connected on the driven shaft of decelerator (19) by first shaft coupling (10).
7. hydraulic machinery combined regulating formula seeding unit stepless speed change device as claimed in claim 1, it is characterized in that, first belt pulley (13) and second belt pulley (16) are connected on seeding unit axle (12) and the hydraulic motor power transmission shaft (17) by flat key respectively, and first belt pulley (13) is connected by belt (14) with second belt pulley (16).
8. hydraulic machinery combined regulating formula seeding unit stepless speed change device as claimed in claim 7 is characterized in that, between first belt pulley (13) and second belt pulley (16) regulating wheel (15) is installed also.
CN2011101188584A 2011-05-09 2011-05-09 Stepless speed change device of hydraulic and mechanical united controllable seeding apparatus CN102217445A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011101188584A CN102217445A (en) 2011-05-09 2011-05-09 Stepless speed change device of hydraulic and mechanical united controllable seeding apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011101188584A CN102217445A (en) 2011-05-09 2011-05-09 Stepless speed change device of hydraulic and mechanical united controllable seeding apparatus

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CN102217445A true CN102217445A (en) 2011-10-19

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103115128A (en) * 2012-11-23 2013-05-22 浙江小精农机制造有限公司 Modular-designed stepless-step combined speed changing box
CN106763738A (en) * 2016-12-26 2017-05-31 王军辉 A kind of hydraulic continuously variable transmission

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2538610Y (en) * 2002-03-15 2003-03-05 中国人民解放军第二炮兵第一研究所 Oil pumping power device for double fuel oil charging vehicle
WO2003060350A1 (en) * 2002-01-17 2003-07-24 Yanmar Agricultural Equipment Co., Ltd. Working truck
US20060052203A1 (en) * 2002-11-11 2006-03-09 Peter Pleyer Gearbox, particularly for transmission systems in devices for metering granular materials, and a metering device including the Gearbox
CN1899015A (en) * 2006-07-03 2007-01-24 泰州现代农业装备有限公司 Driving device for full feeding rice and wheat combine power driver
CN2862630Y (en) * 2006-02-28 2007-01-31 刘少先 Tractor-propelled seedling planting machine
CN201630012U (en) * 2009-05-26 2010-11-17 吴昌友 Hydraulic-drive corn harvester heater

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003060350A1 (en) * 2002-01-17 2003-07-24 Yanmar Agricultural Equipment Co., Ltd. Working truck
CN101080972A (en) * 2002-01-17 2007-12-05 洋马农机株式会社 Working truck
CN2538610Y (en) * 2002-03-15 2003-03-05 中国人民解放军第二炮兵第一研究所 Oil pumping power device for double fuel oil charging vehicle
US20060052203A1 (en) * 2002-11-11 2006-03-09 Peter Pleyer Gearbox, particularly for transmission systems in devices for metering granular materials, and a metering device including the Gearbox
CN2862630Y (en) * 2006-02-28 2007-01-31 刘少先 Tractor-propelled seedling planting machine
CN1899015A (en) * 2006-07-03 2007-01-24 泰州现代农业装备有限公司 Driving device for full feeding rice and wheat combine power driver
CN201630012U (en) * 2009-05-26 2010-11-17 吴昌友 Hydraulic-drive corn harvester heater

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103115128A (en) * 2012-11-23 2013-05-22 浙江小精农机制造有限公司 Modular-designed stepless-step combined speed changing box
CN106763738A (en) * 2016-12-26 2017-05-31 王军辉 A kind of hydraulic continuously variable transmission

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Application publication date: 20111019

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