CN207470598U - A kind of variable bent axle of crank length - Google Patents
A kind of variable bent axle of crank length Download PDFInfo
- Publication number
- CN207470598U CN207470598U CN201721445483.1U CN201721445483U CN207470598U CN 207470598 U CN207470598 U CN 207470598U CN 201721445483 U CN201721445483 U CN 201721445483U CN 207470598 U CN207470598 U CN 207470598U
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- crank
- plunger
- oil circuit
- bent axle
- type groove
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Abstract
The utility model discloses a kind of variable bent axle of crank length, to overcome the problems, such as manufacture of the existing technology of high cost, poor reliability, complicated.The utility model is bilateral symmetry, including bolt, upper crank, caging bolt, gland, sealing felt collar, plunger, sealing ring, lower crank, upper oil circuit, lower oil circuit composition；Plunger lower part is mounted in the oval runway type groove of lower crank upper end, and gland is fixed on lower crank upper end with caging bolt；Plunger upper part is mounted in the oval runway type groove of upper crank bottom, is linked together upper crank with plunger upper part by bolt.Plunger had both connected crank or had connected lower crank, oil is entered by upper oil circuit or lower oil circuit in the ellipse runway type groove of lower crank upper end, plunger and upper crank can move up and down in the ellipse runway type groove of lower crank upper end under the action of oil pressure, realize the increase and reduction of compression ratio.
Description
Technical field
The utility model is related to a kind of engine crankshafts, are a kind of variable bent axles of crank length more precisely.
Background technology
Fossil energy is a kind of non-renewable energy resources, and with the development of industry, energy reserve is reduced, and environment is also constantly being disliked
Change.Increasingly strict emission regulation proposes engine higher requirement, and wherein compression ratio is to influence engine economy
One key factor.Volume of cylinder and piston motion to top dead centre when the compression ratio of engine refers to piston motion to lower dead center
When the ratio between volume of cylinder, compression ratio increase can effectively improve the performance and efficiency of engine.Under normal circumstances, engine
Compression ratio is higher, and piston working stroke is longer, and acting is more, and output power is also bigger.But pressure excessive in gasoline engine
Than that can lead to uncontrollable burning so as to damage engine, and when load is bigger pinking easily occurs for contracting；In diesel engine
Excessive compression ratio makes Cylinder Pressure of Diesel Engine excessively high, and vibration noise is caused to aggravate, the moving component impact load to be born
Increase, so as to influence the functional reliability of diesel engine and service life.In order to avoid case above, existing engine is had to
Limitation is made to engine compression ratio, engine efficiency reduces when leading to low turn.It introduces after changeable compression ratio technique, Ke Yi
It is low to increase compression ratio, raising efficiency when turning；Compression ratio is reduced when height turns, reduces pinking.Variable compression ratio engine in low turn,
Efficiency is obviously improved.And in urban traffic situation, when most of, engine is exactly what the slow-speed of revolution was run, so, pressure-variable
Compression ratio engine is advantageous in oil consumption.Therefore, it is very using changeable compression ratio technique according to the variation of engine load
It is necessary.
It can using changeable compression ratio technique：
1. by improving the thermal efficiency of engine, the economy of engine is improved.
2. reducing the probability that pinking generates, be conducive to the stability of engine operation.
3. convenient for Engine Downsizing, light-weight design.
4. hair is conducive to, fuel combustion is abundant, and improvement is discharged.
Invention content
The utility model for solve the of high cost, poor reliability of manufacture of the existing technology, it is complicated the technical issues of,
Provide a kind of variable bent axle of crank length.
In order to solve the above technical problems, the utility model adopts the following technical scheme that realization：
A kind of variable bent axle of crank length described in the utility model is symmetrical structure, and tiled configuration is symmetrical, including upper
Crank, lower crank, eight bolts, two glands, two plungers, two sealing felt collars, four sealing rings, two upper oil circuits, two
A lower oil circuit.It is characterized in that：
The crank is divide into upper part and lower part, upper crank and lower crank, and plunger lower part is mounted on the ellipse of lower crank upper end
In circle runway type groove, gland is fixed on lower crank with caging bolt；Plunger upper part is mounted on the oval of upper crank bottom and runs
In road type groove, upper crank is linked together with plunger upper part by bolt.
A kind of variable bent axle of crank length includes upper crank and lower crank two parts, and plunger both connects crank
Also lower crank is connected, plunger can move up and down in the ellipse runway type groove of lower crank upper end under the action of oil pressure.
The lower crank is bilateral symmetry, opens that there are two oval runway type grooves and four oil circuits and four screw threads
Hole, respectively there are one oval runway type grooves and two oil circuits and two threaded holes for left and right two parts.Under the plunger lower part is placed
In the slot of crank upper end, gland is fixed on by caging bolt on lower crank.Oil circuit is wherein descended to be communicated with oval runway type groove, under
Oil in oil circuit can be entered in slot.
The gland bottom is provided with annular groove and an oilhole, and oilhole is connected with annular groove, and gland bottom
Oilhole be connected with the upper oil circuit on lower crank.Oil can be entered in the annular groove of gland by the oilhole of upper oil circuit and gland, so
Enter in the oval runway type groove of lower crank upper end afterwards.
The upper crank is bilateral symmetry, opens there are four tapped through hole and two oval runway type grooves, controls two
Each two tapped through holes and an oval runway type groove are held, oval runway type groove is opened in crank bottom.The plunger upper part
It is oval racetrack cylinder, plunger lower part is oval racetrack boss；The plunger upper part is opened there are two threaded hole, on plunger
Portion is fixed by two bolts with upper crank；Plunger lower part is opened there are two closure gasket groove, and two sealing rings are individually positioned in plunger
In two closure gasket grooves of lower part.
The beneficial effects of the utility model are compared with prior art：
1. a kind of variable bent axle of crank length described in the utility model is only made of upper lower crank two parts, structure letter
Singly it is easily installed.
2. a kind of variable bent axle of crank length described in the utility model is only modified crank, avoid to cylinder
The change of lid, body reduces design cost.
3. a kind of variable bent axle of crank length described in the utility model is for ease of maintenaince and renewal part.
Description of the drawings
The utility model will be further described below with reference to the accompanying drawings：
Fig. 1 is a kind of full sectional view of the variable bent axle installation diagram of crank length described in the utility model.
Fig. 2 is the vertical view of upper crank.
Fig. 3 is the partial sectional view of the front view of plunger.
Fig. 4 is the partial sectional view of the side view of plunger.
Fig. 5 is the vertical view of plunger.
Fig. 6 is the bottom view of gland.
Fig. 7 is the sectional view of gland side view.
In figure：1. bolt, crank on 2., 3. caging bolts, 4. glands, 5. sealing felt collars, 6. plungers, 7. sealing rings, 8.
Lower crank, oil circuit on 9., 10. times oil circuits.
Specific embodiment
The utility model is explained in detail below in conjunction with the accompanying drawings：
As shown in Figure 1,6 lower part of plunger is placed in the oval runway type groove of 8 upper end of lower crank, pass through two caging bolts
3 are fixed on gland 4 on lower crank 8, and 6 top of plunger is provided with threaded hole, and size is identical with the tapped through hole of upper crank, passes through two
A bolt 1 fixes plunger 6 and upper crank 2.6 lower part of plunger is opened there are two closure gasket groove, and two sealing rings 7 are individually positioned in two
In a closure gasket groove.
As shown in Fig. 2, upper crank 2 is symmetrical structure, tiled configuration is symmetrical, and upper crank 2 is opened there are four tapped through hole, or so
Each two of both ends.
As shown in Fig. 3, Fig. 4, Fig. 5,6 top of plunger is opened there are two threaded hole, two threaded holes on same center line,
6 top of plunger is coupled with upper crank 2 by bolt 1.It opens there are two closure gasket groove 6 lower part of plunger.
As shown in Figure 6 and Figure 7,4 bottom of gland is provided with annular groove and oilhole, and oilhole and annular groove communicate, the oilhole of gland 4
It is connected with upper oil circuit 9.The annular groove of gland 4 is communicated with the slot on 8 top of lower crank.Oil can pass through 4 bottom of upper oil circuit 9 and gland
Oilhole is entered in the annular groove of gland 4, subsequently into the oval runway type groove on 8 top of lower crank.
As shown in Figure 1, lower crank 8 is bilateral symmetry, respectively there are one oval runway type groove and two for left and right two parts
Oil circuit and two threaded holes.Oil circuit 10 is wherein descended to be communicated with the oval racetrack trench bottom of 8 upper end of lower crank, oil can pass through lower oil
Road is entered in the slot above lower crank.
As shown in Figure 1, when engine needs larger compression ratio, from left and right, two-part upper oil circuit 9 does not enter oil
In the oval runway type groove on 8 top of lower crank, oil pressure becomes larger on the inside of 6 boss of plunger, when oil pressure increases to critical value, plunger 6
It will be moved down along the plain line of oval runway type groove, opposite lower crank 8 moves down simultaneously for plunger 6 and upper crank 2 at this time, compression ratio
Become larger, when plunger 6 and upper crank 2 move down a distance, 6 lower part of plunger is contacted with the slot bottom of lower crank 8, and compression ratio reaches most
Greatly；When engine needs small reduction ratio, not from left and right, two-part lower oil circuit 10 enters the ellipse on 8 top of lower crank to oil
In runway type groove, 6 lower bottom end oil pressure of plunger becomes larger, and when oil pressure increases to critical value, plunger 6 will be along oval runway type groove
Plain line move up, opposite lower crank moves up simultaneously for plunger 6 and upper crank 2, and compression ratio becomes smaller.
Claims (5)
1. the variable bent axle of a kind of crank length, which is characterized in that a kind of variable bent axle of crank length includes bolt
(1), upper crank (2), caging bolt (3), gland (4), sealing felt collar (5), plunger (6), sealing ring (7), lower crank (8), on
Oil circuit (9), lower oil circuit (10)；A kind of variable bent axle of crank length is symmetrical structure, and tiled configuration is symmetrical；Plunger
(6) lower part is mounted in the slot of lower crank (8) upper end, and gland (4) is fixed on lower crank upper end by caging bolt (3)；Plunger
(6) top is mounted in the slot of upper crank (2) bottom, is coupled upper crank (2) with plunger (6) top by bolt (1)；Two
Sealing ring (7) is individually positioned in two closure gasket grooves of plunger (6) lower part.
2. a kind of variable bent axle of crank length described in accordance with the claim 1, is characterized in that, the upper crank (2) is pair
Claim structure, left and right two parts are respectively opened there are two tapped through hole and an oval runway type groove, and two tapped through holes are in same
On heart line, oval runway type groove is opened in crank bottom.
3. a kind of variable bent axle of crank length described in accordance with the claim 1, is characterized in that, the lower crank (8) is pair
Claim structure, lower crank (8) left and right two parts respectively open that there are one oval runway type groove and two threaded holes and two oil circuits, upper oil circuits
(9) and lower oil circuit (10)；The port of upper oil circuit (9) and lower oil circuit (10) on rod journal is located at the both sides of rod journal, and
Not on same center line, wherein lower oil circuit (10) is communicated with oval racetrack trench bottom, the oil in lower oil circuit (10) can enter
Into the oval runway type groove of lower crank (8) upper end.
4. a kind of variable bent axle of crank length described in accordance with the claim 1, is characterized in that, the plunger (6) is divided into
Lower two parts, plunger (6) top are oval racetrack cylinders, and plunger (6) lower part is oval racetrack boss；Plunger (6) top
Threaded hole there are two opening, two threaded holes are on same center line；There are two closure gasket grooves for plunger (6) lower part.
5. a kind of variable bent axle of crank length described in accordance with the claim 1, is characterized in that, the gland (4) bottom is opened
There are annular groove and an oilhole, oilhole is communicated with annular groove；The oilhole of gland (4) bottom is communicated with upper oil circuit (9), upper oil circuit
(9) oil in can be entered by oilhole in annular groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721445483.1U CN207470598U (en) | 2017-11-02 | 2017-11-02 | A kind of variable bent axle of crank length |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721445483.1U CN207470598U (en) | 2017-11-02 | 2017-11-02 | A kind of variable bent axle of crank length |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207470598U true CN207470598U (en) | 2018-06-08 |
Family
ID=62262169
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721445483.1U Active CN207470598U (en) | 2017-11-02 | 2017-11-02 | A kind of variable bent axle of crank length |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207470598U (en) |
Cited By (1)
| 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 |
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2017
- 2017-11-02 CN CN201721445483.1U patent/CN207470598U/en active Active
Cited By (1)
| 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 |
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