CN106089978B - A kind of length two-stage adjustable connecting-rod - Google Patents
A kind of length two-stage adjustable connecting-rod Download PDFInfo
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- CN106089978B CN106089978B CN201610597157.6A CN201610597157A CN106089978B CN 106089978 B CN106089978 B CN 106089978B CN 201610597157 A CN201610597157 A CN 201610597157A CN 106089978 B CN106089978 B CN 106089978B
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- length
- cavity
- rod
- valve rod
- connection
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- 239000003921 oil Substances 0.000 claims abstract description 37
- 230000007246 mechanism Effects 0.000 claims abstract description 23
- 239000010705 motor oil Substances 0.000 claims abstract description 19
- 239000010721 machine oil Substances 0.000 claims description 9
- 230000008450 motivation Effects 0.000 claims description 4
- 230000006835 compression Effects 0.000 description 13
- 238000007906 compression Methods 0.000 description 13
- 238000004519 manufacturing process Methods 0.000 description 7
- 230000009467 reduction Effects 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 3
- 208000004141 microcephaly Diseases 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 208000002925 dental caries Diseases 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 206010016256 fatigue Diseases 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Classifications
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- 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
-
- 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
- F02D15/02—Varying compression ratio by alteration or displacement of piston stroke
Abstract
The present invention relates to a kind of length two-stage adjustable connecting-rods, including big end（1）And small end of connecting rod（3）, it is characterised in that：It further include that length can be changed shaft（2）, length can be changed shaft（2）One end and big end（1）Connection, length can be changed shaft（2）The other end and small end of connecting rod（3）Connection；Length can be changed shaft（2）Including the cavity being plugged in together（21）And valve rod（22）, cavity（21）The connector and big end of bottom end（1）One end connection, cavity（21）Bottom passes through main oil gallery（24）And big end（1）The oil hole of upper crankshaft connection hole is connected；Valve rod（22）The connector and small end of connecting rod of the other end（3）Connection, valve rod（22）Spring is provided between its connector（23）.Cavity（21）Cavity wall and valve rod（22）Between be additionally provided with self-locking mechanism（26）.The present invention is controlled using engine oil pressure, realizes that two level lengths of connecting rod are adjustable by different engine oil pressures.
Description
Technical field
The invention belongs to technical field of automobile engine, and in particular to a kind of length two-stage adjustable connecting-rod.
Background technique
Increasingly harsh due to every regulation, the requirement for engine consumption and discharge is higher and higher, petrol engine
Compression ratio it is higher and higher, can with the raising of engine compression ratio, engine in full load pinking tendency aggravation, engine
Dynamic property declines therewith.Variable compression ratio engine can be with this problem of effective solution, and in sub-load, engine is used
High compression ratio reduces engine consumption to improve engine thermal efficiency, and when full load uses small reduction ratio, to improve engine
Anti-knock properties promote engine power performance.
Engine link is largely monolithic construction at present, and connecting rod shank only has a kind of length, can only realize a kind of hair
Motivation compression ratio；There are also part connecting rods using variable length of connecting rod, and the shaft of connecting rod is designed to piston structure, is changed by plunger
Become length of connecting rod, to realize that length of connecting rod is variable.The connecting rod of monoblock type, length of connecting rod is immutable, and structure is simple, and performance can
It leans on, but can only realize a kind of compression ratio；Connecting rod shank is designed to piston structure, structure is complicated, and connecting rod shank becomes plunger
Formula structure, connecting rod shank are difficult through engine reliability test, fatiguability damage.
Summary of the invention
In order to solve above-mentioned technical problem, the present invention devises a kind of length two-stage adjustable connecting-rod, passes through adjusting
The length of connecting rod changes engine combustion volume, to realize that engine compression ratio two-stage is adjustable.
In order to solve above-mentioned technical problem, present invention employs following scheme：
A kind of length two-stage adjustable connecting-rod, including big end（1）And small end of connecting rod（3）, it is characterised in that：It further include length
Spend variable shaft（2）, length can be changed shaft（2）One end and big end（1）Connection, length can be changed shaft（2）The other end
And small end of connecting rod（3）Connection；Length can be changed shaft（2）Including the cavity being plugged in together（21）And valve rod（22）, engine machine
Oil access cavity（21）, cavity is controlled by different engine oil pressures（21）And valve rod（22）Opposite sliding to the company of realization
Two level lengths of bar are adjustable.
Further, cavity（21）The connector and big end of bottom end（1）One end connection, cavity（21）Bottom passes through main oil
Road（24）And big end（1）The oil hole of upper crankshaft connection hole is connected；Valve rod（22）The connector and connecting rod of the other end
Microcephaly（3）Connection, valve rod（22）Spring is provided between its connector（23）.
Further, cavity（21）On the connector of bottom end and valve rod（22）Connecting hole is machined on the connector of the other end
（27）With with corresponding connection bolt cooperating.
Further, cavity（21）Cavity wall and valve rod（22）Between be additionally provided with self-locking mechanism（26）.
Further, self-locking mechanism（26）Including lock pin（262）, cavity（21）Inner wall on be machined with locking pin hole, lock
Shotpin hole bottom is provided with reset spring（263）, lock pin（262）It is arranged in locking pin hole and valve rod（22）On pin hole match
Close work；Valve rod（22）On pin hole bottom and be arranged in valve rod（22）Upper self-locking oil duct（261）Connection, self-locking oil duct（261）
Entrance pass through oil duct branch（25）And main oil gallery（24）Connection.
Further, big end（1）The other end is connect with crankshaft, small end of connecting rod（3）The other end is connect with piston.
The length two-stage adjustable connecting-rod has the advantages that：
（1）The present invention, when engine oil pressure is greater than the set value, length can be changed the self-locking mechanism unlock in shaft, and shaft exists
It is extended under the action of engine oil pressure, when engine oil pressure is less than setting value, under the action of length can be changed the spring force in shaft,
Shaft retraction, while locking mechanism locks connecting rod shank, using different engine oil pressures to realize that length of connecting rod is adjustable.
（2）The configuration of the present invention is simple, assembly are easy, are easy to carry out large batch of flow line production.Two level lengths can always
The connecting rod of tune is by three independent components：Big end, length can be changed shaft and small end of connecting rod is assemblied by bolt,
Production operation level, it is only necessary to carry out the simple bolt assembly of three independent components, structure is simple, convenient for production, assembly line
Operation does not influence productive temp.
（3）The principle of the invention is simple, product volume production easy to accomplish.The present invention utilizes the necessary oil hydraulic system of engine, adopts
With the machine oil of different pressures, length adjustable control is carried out to length-adjusting rod body, in order to make mechanism more secure and reliable, mechanism is used
Self-locking device, in the case where engine oil pressure is low, length-adjusting rod body is carried out self-locking using mechanical automatic locking mechanism, guarantees to start
In large load operation, adjustable rod is in self-locking state machine, and solid and reliable, is made connecting rod shank in most short status, is guaranteed hair
Motivation is in small reduction ratio, and engine is made to obtain abundant dynamic property；And when middle Smaller load, using the engine oil pressure of engine,
The self-locking mechanism of length-adjusting rod body is unlocked, while opening valve rod, makes connecting rod shank in longest state, guarantees that engine is in
Big compression ratio makes engine have good economy.
（4）Small end of connecting rod of the present invention can be changed shaft by being bolted with length, directly be transmitted to the change of length of connecting rod
Piston is directly changed combustion chamber volume, achievees the purpose that change engine compression ratio.
Detailed description of the invention
Fig. 1：The structural schematic diagram of length two-stage adjustable connecting-rod of the present invention；
Fig. 2：Length can be changed the structural schematic diagram I of shaft in the present invention；
Fig. 3：Length can be changed the structural schematic diagram II of shaft in the present invention；
Fig. 4：The structural schematic diagram of self-locking mechanism in the present invention.
Description of symbols：
1-big end；2-length can be changed shaft；21-cavitys；22-valve rods；23-springs；24-main oil gallerys；
25-oil duct branches；26-self-locking mechanisms；261-self-locking oil ducts；262-lock pins；263-reset springs；27-connections
Hole；3-smalls end of connecting rod.
Specific embodiment
With reference to the accompanying drawing, the present invention will be further described：
Fig. 1 to Fig. 4 shows a kind of length two-stage adjustable connecting-rod, including big end 1, length can be changed shaft 2 and connecting rod
Microcephaly 3.One end that length can be changed shaft 2 is connected by bolt with 1 one end of big end, and the other end that length can be changed shaft 2 is logical
Bolt is crossed to connect with 3 one end of small end of connecting rod.1 other end of big end is connect with crankshaft, and 3 other end of small end of connecting rod and piston connect
It connects.
It includes the cavity 21 being plugged in together and valve rod 22 and self-locking mechanism 26 that length, which can be changed shaft 2,.Such as Fig. 2 and Fig. 3
It is shown, a connecting hole 27 is machined on the connector of 21 bottom end of cavity to connect with big end 1.The connection of 21 bottom end of cavity
Head is also machined with main oil gallery 24, and cavity 21 is connected by main oil gallery 24 with the oil hole of crankshaft connection hole on big end 1, hair
The pressure machine oil of motivation input by the oil hole of 1 crankshaft connection hole of big end, the oil groove on connecting rod bearing shell, main oil gallery 24 into
Enter cavity 21.Also a connecting hole 27 is machined on the connector of 22 other end of valve rod to connect with small end of connecting rod 3,22 He of valve rod
Spring 23 is provided between its connector.Self-locking mechanism includes self-locking oil duct 261, lock pin 262 and reset spring 263.It is self-locking
Oil duct 261 is longitudinal to be arranged on valve rod 22 and penetrates through with the pin hole being arranged radially on valve rod 22, and the entrance of self-locking oil duct 261 is logical
Oil channel branch 25 is connected to main oil gallery 24.Also locking pin hole is machined on the inner wall of cavity 21, lock pin hole bottom is provided with
Reset spring 263, lock pin 262 be arranged in locking pin hole with the pin hole cooperating on valve rod 22, as shown in Figure 4.
When work, the machine oil of engine link axle journal is introduced length by main oil gallery 24 can be changed shaft 2, come from main oil gallery 24
Machine oil, through oil duct branch 25 enter self-locking mechanism 26 self-locking oil duct 261 in, when engine oil pressure is greater than the set value, high pressure
Machine oil overcomes the spring force of reset spring 263, the pin hole that lock pin 262 is opened and is detached from valve rod 22, in this way, self-locking mechanism
26 unlocks, valve rod 22 is opened under engine oil pressure effect and is stretched out along cavity, while compressed spring 23, to realize
Length can be changed the elongation of shaft 2.When engine oil pressure is less than setting value, under the action of 23 spring force of spring, 22 bar of valve rod
Body is returned to initial position, while the lock pin 262 of self-locking mechanism 26 is popped up and is inserted under the action of reset spring 263
Valve rod 22 is locked in pin hole on to valve rod 22.The present invention is using different engine oil pressures and self-locking mechanism 26 to realize length of connecting rod
The two-stage of degree is adjustable.
The length two-stage adjustable connecting-rod is controlled using engine oil pressure, realizes connecting rod by different engine oil pressures
Two level lengths are adjustable.
When engine operation is in middle Smaller load, when needing big compression ratio, by control, engine is made to be supplied to the machine of connecting rod
Oil pressure is higher than the setting value of link design, and engine oil pressure opens the self-locking device 26 of length-adjusting rod body 2, while opening valve rod
22, it rises adjustable shaft long, reaches lengthening connecting rod, improve the purpose of engine compression ratio.
When engine operation is in big load, when needing small reduction ratio, by control, engine is made to be supplied to the machine oil of connecting rod
Pressure reduction, and the valve rod 22 of adjustable shaft is under spring force, self-return, meanwhile, self-locking device 26 locks shaft
Extremely, adjustable rod is in original state, is reached the long shortening of connection-rod, is reduced the purpose of engine compression ratio.
The configuration of the present invention is simple, assembly are easy, are easy to carry out large batch of flow line production.Two-stage is length-adjustable always
Connecting rod is by three independent components：Big end, length can be changed shaft and small end of connecting rod is assemblied by bolt, is producing
Operating level, it is only necessary to carry out the simple bolt assembly of three independent components, structure is simple, convenient for production, pile line operation
Do not influence productive temp.
The principle of the invention is simple, product volume production easy to accomplish.The present invention utilizes the necessary oil hydraulic system of engine, using not
With the machine oil of pressure, length adjustable control is carried out to length-adjusting rod body, in order to make mechanism more secure and reliable, mechanism is used certainly
Locking device, in the case where engine oil pressure is low, length-adjusting rod body is self-locking using mechanical automatic locking mechanism progress, guarantees that engine exists
When large load operation, adjustable rod is in self-locking state, and solid and reliable, is made connecting rod shank in most short status, is guaranteed engine
In small reduction ratio, engine is made to obtain abundant dynamic property；And when middle Smaller load, using the engine oil pressure of engine, it will grow
The self-locking mechanism unlock of adjustable shaft is spent, while opening valve rod, makes connecting rod shank in longest state, guarantees that engine is in big pressure
Contracting ratio, makes engine have good economy.
Small end of connecting rod of the present invention can be changed shaft by being bolted with length, and the change of length of connecting rod is directly transmitted to work
Plug, is directly changed combustion chamber volume, achievees the purpose that change engine compression ratio.
Above in conjunction with attached drawing, an exemplary description of the invention, it is clear that realization of the invention is not by aforesaid way
Limitation, as long as use the inventive concept and technical scheme of the present invention carry out various improvement, or it is not improved will be of the invention
Conception and technical scheme directly apply to other occasions, be within the scope of the invention.
Claims (4)
1. a kind of length two-stage adjustable connecting-rod, including big end（1）And small end of connecting rod（3）, it is characterised in that：It further include length
Variable shaft（2）, length can be changed shaft（2）One end and big end（1）One end connection, length can be changed shaft（2）It is another
End and small end of connecting rod（3）One end connection；Length can be changed shaft（2）Including the cavity being plugged in together（21）And valve rod（22）, hair
Motivation machine oil accesses cavity（21）, cavity is controlled by different engine oil pressures（21）And valve rod（22）Opposite sliding to
Realize that two level lengths of connecting rod are adjustable；
Cavity（21）Cavity wall and valve rod（22）Between be additionally provided with self-locking mechanism（26）, self-locking mechanism（26）Including lock pin
（262）, cavity（21）Inner wall on be machined with locking pin hole, lock pin hole bottom is provided with reset spring（263）, lock pin
（262）It is arranged in locking pin hole and valve rod（22）On pin hole cooperating；Valve rod（22）On pin hole bottom and setting exist
Valve rod（22）Upper self-locking oil duct（261）Connection, self-locking oil duct（261）Entrance pass through oil duct branch（25）And main oil gallery（24）Even
It is logical；Cavity（21）Bottom passes through main oil gallery（24）And big end（1）The oil hole of upper crankshaft connection hole is connected.
2. length two-stage adjustable connecting-rod according to claim 1, it is characterised in that：Cavity（21）The connector of bottom end and company
Bar major part（1）One end connection, cavity（21）Bottom passes through main oil gallery（24）And big end（1）The oil duct of upper crankshaft connection hole
Hole is connected；Valve rod（22）One end and cavity（21）Plug connection, valve rod（22）The connector and small end of connecting rod of the other end（3）Even
It connects, valve rod（22）And valve rod（22）Spring is provided between the connector of the other end（23）.
3. length two-stage adjustable connecting-rod according to claim 2, it is characterised in that：Cavity（21）On the connector of bottom end and
Valve rod（22）Connecting hole is machined on the connector of the other end（27）With with corresponding connection bolt cooperating.
4. length two-stage adjustable connecting-rod according to claim 1,2 or 3, it is characterised in that：Big end（1）The other end with
Crankshaft connection, small end of connecting rod（3）The other end is connect with piston.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610597157.6A CN106089978B (en) | 2016-07-27 | 2016-07-27 | A kind of length two-stage adjustable connecting-rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610597157.6A CN106089978B (en) | 2016-07-27 | 2016-07-27 | A kind of length two-stage adjustable connecting-rod |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106089978A CN106089978A (en) | 2016-11-09 |
| CN106089978B true CN106089978B (en) | 2018-11-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610597157.6A Active CN106089978B (en) | 2016-07-27 | 2016-07-27 | A kind of length two-stage adjustable connecting-rod |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107588088A (en) * | 2017-11-02 | 2018-01-16 | 吉林大学 | A kind of variable bent axle of crank length |
| CN109779751B (en) * | 2019-03-29 | 2020-06-26 | 潍柴动力股份有限公司 | Variable length link mechanism and engine |
| CN113223876B (en) * | 2021-04-14 | 2023-03-21 | 国网河北省电力有限公司保定供电分公司 | Switch control device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2161580B (en) * | 1984-07-07 | 1987-08-12 | Peter Robert Davis | Variable length connecting rod |
| WO2002010568A1 (en) * | 2000-08-02 | 2002-02-07 | Yadegar Jerry I | Hydraulically adjustable connecting rod for internal combustion engine efficiency |
| CN201635838U (en) * | 2010-03-22 | 2010-11-17 | 奇瑞汽车股份有限公司 | Connecting rod with variable length |
| CN104260406A (en) * | 2014-10-05 | 2015-01-07 | 苏州蓝王机床工具科技有限公司 | Press machine connecting rod structure |
| CN104620002A (en) * | 2012-07-03 | 2015-05-13 | Avl里斯脱有限公司 | Length-adjustable con rod |
-
2016
- 2016-07-27 CN CN201610597157.6A patent/CN106089978B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2161580B (en) * | 1984-07-07 | 1987-08-12 | Peter Robert Davis | Variable length connecting rod |
| WO2002010568A1 (en) * | 2000-08-02 | 2002-02-07 | Yadegar Jerry I | Hydraulically adjustable connecting rod for internal combustion engine efficiency |
| CN201635838U (en) * | 2010-03-22 | 2010-11-17 | 奇瑞汽车股份有限公司 | Connecting rod with variable length |
| CN104620002A (en) * | 2012-07-03 | 2015-05-13 | Avl里斯脱有限公司 | Length-adjustable con rod |
| CN104260406A (en) * | 2014-10-05 | 2015-01-07 | 苏州蓝王机床工具科技有限公司 | Press machine connecting rod structure |
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| Publication number | Publication date |
|---|---|
| CN106089978A (en) | 2016-11-09 |
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