CN108317158A - A kind of motor-driven variable length link of guide - Google Patents
A kind of motor-driven variable length link of guide Download PDFInfo
- Publication number
- CN108317158A CN108317158A CN201810296112.4A CN201810296112A CN108317158A CN 108317158 A CN108317158 A CN 108317158A CN 201810296112 A CN201810296112 A CN 201810296112A CN 108317158 A CN108317158 A CN 108317158A
- Authority
- CN
- China
- Prior art keywords
- motor
- guide
- guide rod
- rod body
- helical gear
- 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.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C7/00—Connecting-rods or like links pivoted at both ends; Construction of connecting-rod heads
- F16C7/06—Adjustable connecting-rods
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B75/00—Other engines
- F02B75/04—Engines with variable distances between pistons at top dead-centre positions and cylinder heads
- F02B75/045—Engines with variable distances between pistons at top dead-centre positions and cylinder heads by means of a variable connecting rod length
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D15/00—Varying compression ratio
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
- Transmission Devices (AREA)
Abstract
The invention discloses a kind of motor-driven variable length link of guide, to overcome the problems, such as manufacturing cost height of the existing technology, poor reliability, complicated.The present invention is made of gonnecting rod body top and the bottom, helical gear, guide rod, bushing, motor etc.；The first half of gonnecting rod body and lower half are all drilled with threaded hole respectively, and are connected by helical gear；Helical gear side is equipped with guide rod, on the one hand plays a part of to bear moment of flexure, the relative rotation of another aspect limiting rod top and the bottom；Hydraulic oil is added with by the cavity up and down that gonnecting rod body, bushing, guide rod are formed, is connected to by the aperture processed inside guide rod, plays lubrication and damping；Motor is engaged by gear and helical gear, and by the rotation of motor, driving helical gear rotation makes that relative motion occurs to gonnecting rod body top and the bottom, and then changes length of connecting rod, and the compression ratio of engine is made to change.
Description
Technical field
More precisely a kind of component connecting rod of the present invention about internal combustion engine is a kind of motor-driven of guide
Variable length link.
Background technology
For compression ratio as one of engine key parameter, it has very important influence to the thermal efficiency of engine.It passes
It is limited with various influence factors when the internal combustion engine selection compression ratio of system and selects definite value, fixed compression ratio allows for parameters
Compromise, the performance of certain operating modes will necessarily be sacrificed as cost, therefore, it is difficult to play complete machine potentiality, using variable compression ratio
Technology can solve this limitation, effective to improve the power performance and the economy performance of engine, while can better meet
Increasingly harsh emission regulation.
For gasoline engine, compression ratio is too high to be led to gasoline engine mixture pressure is excessively high in cylinder in high load capacity, generated quick-fried
Shake, this can cause engine serious destruction；For diesel engine, compression ratio is excessively high to cause engine to generate violent shake
It is dynamic, influence the service life of engine；For the engine for adding turbocharger, pinking in order to prevent, compression
Than naturally aspirated engine to be less than, compression ratio is fixed, and in low pressure, compression is relatively low, and engine combustion is insufficient,
The thermal efficiency and fuel economy is caused to decline, therefore change compression ratio according to the operating mode of engine to be very important.Using can
It can make engine that can keep suitable compression ratio in each operating mode with compression ratio technique, greatly improve the reliable of engine
Property and performance.
It can using changeable compression ratio technique：
1. improving the thermal efficiency and fuel economy of engine.
2. reducing the probability of pinking and high vibration generation.
3. reducing engine starting and the noxious emission in warming-up process.
4. making engine that there is better fuel oil adaptability.
Invention content
The present invention is solution manufacturing cost height of the existing technology, poor reliability, technology complicated, installation is poor
Problem provides a kind of motor-driven variable length link of guide.
In order to solve the above technical problems, the present invention adopts the following technical scheme that realization：
A kind of motor-driven variable length link of guide includes：The gonnecting rod body first half, helical gear, gonnecting rod body
Lower half, the first sealing ring, the second sealing ring, bushing, third sealing ring, the 4th sealing ring, guide rod, shop bolt, motor,
Bearing, gib head taper stock key, spur gear, nut.
A kind of motor-driven variable length link of guide, which is characterized in that gonnecting rod body is divided into two up and down
Part, the first half of gonnecting rod body and lower half are all drilled with threaded hole respectively, and are connected by helical gear, and helical gear is a kind of
Stepped cylindrical structure, intermediate part are spur gear, and upper and lower side section is oppositely oriented screw thread；Helical gear side arrangement
There is guide rod, on the one hand plays the role of positioning, the relative rotation of limiting rod body top and the bottom, on the other hand, when the crank shaft rotates,
Bear the moment of flexure generated in rotation process；Gonnecting rod body lower half is machined with ladder blind hole, for installing bushing and guide rod；Together
When, by being added with hydraulic oil in bushing, gonnecting rod body lower half, guide rod, the closed space of sealing ring, rises subtract during the work time
The effect of shake and lubrication；The cylindrical step of guide rod lower part processing, on the one hand plays sealing fluid pressure oil, while another party
The maximum position of face limiting rod elongation；Driving motor pedestal is installed in the T-slot of gonnecting rod body lower half side, and is passed through
Shop bolt fixes its position, limits its moving back and forth in slot；Spur gear is installed on electric machine main shaft, passes through gib head taper stock key phase
It connects, it fixes the position of spur gear with nut collective effect, while the gear and helical gear engage.
The gonnecting rod body first half is machined with the tapped blind hole for installing guide rod.
The bushing, gonnecting rod body lower half are added with hydraulic oil in the closed oil pocket of guide rod, inside guide rod
Aperture connection.
The bushing is stairstepping cylindrical structure, it is interference fit with the ladder blind hole that gonnecting rod body lower half processes.
The position of the guide rod, when bent axle rotates clockwise, guide rod is on the right side of helical gear, when bent axle is inverse
When hour hands rotate, guide rod is in the left side of helical gear.
The diameter of the guide rod is more than the diameter of helical gear threaded portion.
The first half of the guide rod is processed as helicitic texture, and there are one cylindrical step, guide rods for lower half processing
Cross-sectional area at step is 2 times of cross-sectional area at polished rod.
The guide rod is machined with blind hole along center line bottom-up, and side is also machined with to be communicated with central blind hole
Aperture.
Compared with prior art the beneficial effects of the invention are as follows：
1. a kind of motor-driven variable length link of guide of the present invention is dynamic using motor as driving
Power source can ensure the accuracy of control.
2. a kind of motor-driven variable length link of guide of the present invention is equipped with damping device, can
Preferably adapt to the alternating load of engine.
3. a kind of motor-driven variable length link of guide of the present invention, only adds connecting rod
Work, and install driving device additional, installation is good, at low cost.
4. a kind of motor-driven variable length link of guide of the present invention, only reequips connecting rod,
The part of addition is few, simple in structure.
Description of the drawings
The present invention will be further described below with reference to the drawings：
Fig. 1 is a kind of front view of the motor-driven variable length link of guide of the present invention；
Fig. 2 is a kind of motor-driven variable length link Section A-A sectional view of guide of the present invention；
Fig. 3 is a kind of sectional view of the motor-driven variable length link left view of guide of the present invention；
Fig. 4 is a kind of main view section view of the bushing of the motor-driven variable length link of guide of the present invention
The enlarged drawing of figure；
Fig. 5 is a kind of putting for the vertical view of the bushing of the motor-driven variable length link of guide of the present invention
Big figure；
In figure：1, the gonnecting rod body first half, 2, helical gear, 3, gonnecting rod body lower half, the 4, first sealing ring, the 5, second sealing
Circle, 6, bushing, 7, third sealing, the 8, the 4th sealing ring, 9, guide rod, 10, shop bolt, 11, motor, 12, bearing, 13, hook
Head key, 14, spur gear, 15, nut.
Specific implementation mode
The present invention is explained in detail below in conjunction with the accompanying drawings：
Such as Fig. 1, shown in Fig. 3, gonnecting rod body is divided into 3 two parts of the gonnecting rod body first half 1 and gonnecting rod body lower half, and gonnecting rod body
Top and the bottom center is threaded hole respectively, is connected by helical gear 2；Guiding is installed in 2 side of helical gear
Bar 9,9 upper end of guide rod are helicitic texture, and there are one cylindrical boss for lower end processing, while being machined with aperture inside guide rod 9；
By gonnecting rod body lower half 3, cavity is oil pocket up and down in 9 closed cavity of bushing 6 and guide rod, wherein it is added with hydraulic oil, on
Lower oil cavitie is interconnected by the aperture inside guide rod 9, and sealing ring is used in combination to seal, and intermediate cavity does not have hydraulic oil, to
Constitute a damping and lubricating arrangement；Motor 11 is a kind of direct current generator, and 3 side of gonnecting rod body lower half is machined with installation motor 11
Slot, 11 floor installation of motor fixes its position in slot, and by shop bolt 10；Spur gear is installed on 11 main shaft of motor
14, it is connected by gib head taper stock key 13, and its position is fixed in conjunction with nut 15, meanwhile, spur gear 14 and helical gear 2 engage.
As shown in Figure 1, gonnecting rod body is divided into two parts, the part for connecting them up and down from centre is referred to as helical gear
2, it is a kind of stepped cylindrical structure, and intermediate part is spur gear, and upper and lower side section is oppositely oriented screw thread；Gonnecting rod body
Lower half 3 is machined with stepped hole, for installing bushing 6 and guide rod 9.
As shown in Fig. 2, the cross sectional shape of 3 shaft of the gonnecting rod body first half 1 and gonnecting rod body lower half is rectangular.
As shown in figure 3, the slot of installation motor 11 is T-slot, and it is machined with pin hole in corresponding position, for installing positioning
Pin 10 fixes motor 11；Gonnecting rod body lower half 3 is provided with motor shaft fixed seat simultaneously, and motor master is fixed using bearing 12
Axis, it is ensured that 11 steady operation of motor.
Such as Fig. 4, shown in Fig. 5, the structure of bushing 6 is cylinder stairstepping, and centre is machined with through-hole.
As shown in Figure 1, the position of guide rod 9 is located at the side of helical gear 2, when bent axle rotates clockwise, guide rod 9
On the right side of helical gear 2, when bent axle rotates counterclockwise, guide rod 9 is in the left side of helical gear 2；And the diameter of guide rod 9
More than the diameter at 2 screw thread of helical gear, when the crank shaft rotates, guide rod 9 bears main moment of flexure, is ensureing helical gear 2 just
Often work.
As shown in Figure 1, Figure 3, when engine needs small reduction ratio, ECU sends a signal to motor 11, and motor 11 is opened
Beginning rotates forward, by spur gear 14 drive helical gear 2 rotate because about 2 thread rotary orientation of helical gear on the contrary, with
The pivot link body first half 1 and the gonnecting rod body lower half 3 for engine are close to each other, and length of connecting rod shortens so that on piston
The combustion chamber volume of engine becomes larger when stop, so that engine compression ratio reduces.
As shown in Figure 1, Figure 3, when engine needs high compression ratio, similarly, 11 backwards rotation of driving motor passes through
Spur gear 14 drives helical gear 2 to rotate backward, and the gonnecting rod body first half 1 and gonnecting rod body lower half 3 are located remotely from each other, and length of connecting rod becomes
Long, engine combustion chamber volume becomes smaller when piston top dead center so that compression ratio increases.
As shown in Figure 1, Figure 3, after the compression ratio of engine changes to desired compression ratio, motor 11 is stopped, even
Pole length remains unchanged, and the compression ratio of engine is kept constant at this time.
Claims (8)
1. a kind of motor-driven variable length link of guide, which is characterized in that the motor of the guide drives
Dynamic formula variable length link includes the gonnecting rod body first half (1), helical gear (2), gonnecting rod body lower half (3), the first sealing ring
(4), the second sealing ring (5), bushing (6), third sealing ring (7), the 4th sealing ring (8), guide rod (9), shop bolt (10),
Motor (11), bearing (12), gib head taper stock key (13), spur gear (14), nut (15)；
Gonnecting rod body is divided into two parts up and down, and the first half (1) of gonnecting rod body and gonnecting rod body lower half (3) are all drilled with screw thread respectively
Hole, and connected by helical gear (2), helical gear (2) is a kind of stepped cylindrical structure, and intermediate part is spur gear,
Upper and lower side section is oppositely oriented screw thread；Side of the location arrangements of guide rod (9) in helical gear (2)；Gonnecting rod body lower half
Portion (3) is machined with ladder blind hole, for installing bushing (6) and guide rod (9)；Meanwhile by bushing (6), gonnecting rod body lower half
(3), it is added with hydraulic oil in guide rod (9) closed space, is sealed by sealing ring；The pedestal of motor (11) is fixed on gonnecting rod body
In the T-slot of lower half (3), and positioned by shop bolt (10)；Spur gear (14) is installed on motor (11) main shaft, is passed through
Gib head taper stock key (13) is connected with each other, it realizes the position of fixed spur gear (14), while the gear with nut (15) collective effect
It is engaged with helical gear (2).
2. a kind of motor-driven variable length link of guide described in accordance with the claim 1, which is characterized in that described
The gonnecting rod body first half (1) be machined with the tapped blind hole for installing guide rod.
3. a kind of motor-driven variable length link of guide described in accordance with the claim 1, which is characterized in that described
Bushing (6), gonnecting rod body lower half (3), hydraulic oil is added in the closed upper lower oil cavitie of guide rod (9), pass through guide rod (9)
Internal aperture connection.
4. a kind of motor-driven variable length link of guide described in accordance with the claim 1, which is characterized in that described
Bushing (6) be stairstepping cylindrical structure, the ladder blind hole of its processing with gonnecting rod body lower half (3) is interference fit.
5. a kind of motor-driven variable length link of guide described in accordance with the claim 1, which is characterized in that described
The guide rod (9) position, when bent axle rotates clockwise, guide rod (9) works as song on the right side of helical gear (2)
When axis rotates counterclockwise, left side of the guide rod (9) in helical gear (2).
6. a kind of motor-driven variable length link of guide described in accordance with the claim 1, which is characterized in that described
Guide rod (9) diameter be more than helical gear (2) threaded portion diameter.
7. a kind of motor-driven variable length link of guide described in accordance with the claim 1, which is characterized in that described
The first half of guide rod (9) be processed as helicitic texture, there are one cylindrical steps for lower half processing, and guide rod (9) is in step
The cross-sectional area at place is 2 times of cross-sectional area at polished rod.
8. a kind of motor-driven variable length link of guide described in accordance with the claim 1, which is characterized in that described
Guide rod (9) be machined with blind hole along center line bottom-up, side is also machined with the aperture communicated with central blind hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810296112.4A CN108317158B (en) | 2018-04-04 | 2018-04-04 | Motor-driven variable-length connecting rod with guide rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810296112.4A CN108317158B (en) | 2018-04-04 | 2018-04-04 | Motor-driven variable-length connecting rod with guide rod |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108317158A true CN108317158A (en) | 2018-07-24 |
| CN108317158B CN108317158B (en) | 2023-10-10 |
Family
ID=62896559
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810296112.4A Active CN108317158B (en) | 2018-04-04 | 2018-04-04 | Motor-driven variable-length connecting rod with guide rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108317158B (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW285696B (en) * | 1994-08-12 | 1996-09-11 | Heath Samuel & Sons Plc | |
| CN102701047A (en) * | 2012-06-11 | 2012-10-03 | 刘振刚 | Light roller cage ear with gas spring hydraulic damper |
| WO2013006892A1 (en) * | 2011-07-13 | 2013-01-17 | The University Of Southern Queensland | Variable length connecting rod |
| DE102011111222A1 (en) * | 2011-08-20 | 2013-02-21 | Neumayer Tekfor Holding Gmbh | Connecting rod structure for conversion of linear movement of working piston into circular movement of crankshaft of engine, has connecting rods that are connected with shaft whose length is variable |
| CN203477158U (en) * | 2013-07-24 | 2014-03-12 | 重庆渝安创新科技有限公司 | Recovery damping force adjustable hydraulic damper |
| CN203670436U (en) * | 2013-11-29 | 2014-06-25 | 长城汽车股份有限公司 | Variable length connecting rod for engine |
| CN104477730A (en) * | 2014-12-13 | 2015-04-01 | 重庆和航科技股份有限公司 | Elevator damping device with adaptability |
| CN205153174U (en) * | 2015-11-10 | 2016-04-13 | 中南林业科技大学 | Viscous damper |
| CN106996333A (en) * | 2017-05-04 | 2017-08-01 | 镇江市高等专科学校 | A kind of low-powered engine variable length link |
| CN107575303A (en) * | 2017-11-02 | 2018-01-12 | 吉林大学 | A kind of motor-driven variable length link |
| CN107859687A (en) * | 2017-10-10 | 2018-03-30 | 中国第汽车股份有限公司 | A kind of variable length link with hydraulic mechanism |
| CN208169323U (en) * | 2018-04-04 | 2018-11-30 | 吉林大学 | A kind of motor-driven variable length link of guide |
-
2018
- 2018-04-04 CN CN201810296112.4A patent/CN108317158B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW285696B (en) * | 1994-08-12 | 1996-09-11 | Heath Samuel & Sons Plc | |
| WO2013006892A1 (en) * | 2011-07-13 | 2013-01-17 | The University Of Southern Queensland | Variable length connecting rod |
| DE102011111222A1 (en) * | 2011-08-20 | 2013-02-21 | Neumayer Tekfor Holding Gmbh | Connecting rod structure for conversion of linear movement of working piston into circular movement of crankshaft of engine, has connecting rods that are connected with shaft whose length is variable |
| CN102701047A (en) * | 2012-06-11 | 2012-10-03 | 刘振刚 | Light roller cage ear with gas spring hydraulic damper |
| CN203477158U (en) * | 2013-07-24 | 2014-03-12 | 重庆渝安创新科技有限公司 | Recovery damping force adjustable hydraulic damper |
| CN203670436U (en) * | 2013-11-29 | 2014-06-25 | 长城汽车股份有限公司 | Variable length connecting rod for engine |
| CN104477730A (en) * | 2014-12-13 | 2015-04-01 | 重庆和航科技股份有限公司 | Elevator damping device with adaptability |
| CN205153174U (en) * | 2015-11-10 | 2016-04-13 | 中南林业科技大学 | Viscous damper |
| CN106996333A (en) * | 2017-05-04 | 2017-08-01 | 镇江市高等专科学校 | A kind of low-powered engine variable length link |
| CN107859687A (en) * | 2017-10-10 | 2018-03-30 | 中国第汽车股份有限公司 | A kind of variable length link with hydraulic mechanism |
| CN107575303A (en) * | 2017-11-02 | 2018-01-12 | 吉林大学 | A kind of motor-driven variable length link |
| CN208169323U (en) * | 2018-04-04 | 2018-11-30 | 吉林大学 | A kind of motor-driven variable length link of guide |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108317158B (en) | 2023-10-10 |
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