CN108547677A - A kind of camshaft with automatic pressure-reducing device - Google Patents
A kind of camshaft with automatic pressure-reducing device Download PDFInfo
- Publication number
- CN108547677A CN108547677A CN201810498848.XA CN201810498848A CN108547677A CN 108547677 A CN108547677 A CN 108547677A CN 201810498848 A CN201810498848 A CN 201810498848A CN 108547677 A CN108547677 A CN 108547677A
- Authority
- CN
- China
- Prior art keywords
- automatic pressure
- camshaft
- reducing device
- spring
- reducing
- 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.)
- Pending
Links
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 5
- 230000006837 decompression Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008450 motivation Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
- F01L13/08—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for decompression, e.g. during starting; for changing compression ratio
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
- F01L1/047—Camshafts
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
Available engine camshaft left side step is set to equipped with positioning pin, driven gear, bolt, the right step in brearing bore, no pressure reducer.The invention discloses a kind of camshafts with automatic pressure-reducing device, including camshaft, relief cam, the ring flange and bearing being sleeved on camshaft, it further include automatic pressure-reducing device, the automatic pressure-reducing device is set on the camshaft between the relief cam and bearing, and the automatic pressure-reducing device is set to the both ends of the camshaft with the ring flange；The automatic pressure-reducing device includes automatic pressure-reducing device ontology, get rid of block, automatic pressure-reducing bar, is pulled pin and spring.The smooth startup of engine is realized, simple and compact for structure, noise is small.
Description
Technical field
The present invention relates to engine accessory power rating technical field, more particularly to a kind of camshaft with automatic pressure-reducing device.
Background technology
Camshaft is one of vital part of engine, and available engine camshaft is as shown in Figure 1,2 left side platform of camshaft
Rank is set to equipped with positioning pin, driven gear, bolt, the right step in brearing bore, no pressure reducer.With engine displacement and
Engine compression ratio incrementally increases, and the starting torque needed for engine also incrementally increases, and the braking torque to starting motor is wanted
Ask just higher, the cost of engine will be significantly increased, while artificial foot starts demand force and increases, and starts just difficulty, in order to
Realize the smooth startup of engine, it usually needs setting reduces the pressure reducer device of engine in-cylinder pressure on the engine.
Invention content
In order to solve the problems, such as the smooth startup of available engine, a kind of camshaft with automatic pressure-reducing device is provided, is played
The effect that engine depressurizes on startup.
A kind of camshaft with automatic pressure-reducing device, including camshaft, relief cam, the ring flange being sleeved on camshaft and
Bearing further includes automatic pressure-reducing device, and the automatic pressure-reducing device is set on the camshaft between the relief cam and bearing, institute
It states automatic pressure-reducing device and is set to the both ends of the camshaft with the ring flange；The automatic pressure-reducing device includes automatic pressure-reducing device sheet
Body gets rid of block, automatic pressure-reducing bar, pulls pin and spring, the automatic pressure-reducing device body fits on the camshaft, and with it is described convex
Wheel shaft rotates synchronously；The block that gets rid of is semicircular structure, and one end connect with the spring, and the other end is free end, described in connection
It pulls pin, the spring other end is fixed on the automatic pressure-reducing device ontology；The connection automatic pressure-reducing bar of pulling pin.
Further, the working range pulled pin is less than 180 degree.
Further, the spring is extension spring structure, and described get rid of is provided with spring connecting hole on block, the spring passes through institute
It states and gets rid of block described in spring connecting hole connection.
Further, grooved hole is arranged in the automatic pressure-reducing device body interior, and the automatic pressure-reducing bar is set to the slot
In hole.
Further, the block that gets rid of is rotatably connected on by rivet on automatic pressure-reducing device ontology.
Further, it there are two the bearings, is set in the both ends of the camshaft.
A kind of engine of the present invention, including any camshaft with automatic pressure-reducing device of claim 1 to 6.
A kind of advantageous effects of the camshaft with automatic pressure-reducing device of the present invention are：
The mounting structure simple and compact of camshaft, globality is strong, is easily installed in dismounting, effectively reduces engine start
When the device load that brings；When engine start, camshaft accelerates rotation, gets rid of root tuber and flies out according to inertia, drives rotation of pulling pin, pulls out
Pin drives the rotation of automatic pressure-reducing bar, the normal intake and exhaust of exhaust valve；When camshaft retarded motion, block return is got rid of, drive subtracts automatically
Compression bar rotates, and automatic pressure-reducing bar is made to be higher than cam outer rim, and exhaust valve is in a deflated state, ensures its service life, saves and uses
Cost.
Description of the drawings
Attached drawing 1 is the structural schematic diagram of camshaft in the prior art；
Attached drawing 2 is a kind of structural schematic diagram of the camshaft with automatic pressure-reducing device of the present invention；
Attached drawing 3 is a kind of structural schematic diagram of the camshaft automatic pressure-reducing device with automatic pressure-reducing device of the present invention.
Attached drawing 4 is a kind of structural schematic diagram of the camshaft automatic pressure-reducing bar with automatic pressure-reducing device of the present invention.
In attached drawing, 1 is ring flange, and 2 be camshaft, and 3 be bearing, and 4 be automatic pressure-reducing device, and 5 is get rid of block, and 6 be automatic pressure-reducing
Bar, 7 is pull pin, and 8 be spring, and 9 be automatic pressure-reducing device ontology, and 10 be relief cam, and 11 be spring connecting hole.Below in conjunction with the accompanying drawings
A kind of camshaft with automatic pressure-reducing device of the present invention is described further with specific embodiment.
Specific implementation mode
Technical scheme of the present invention：As shown in Fig. 2 to 4, a kind of camshaft with automatic pressure-reducing device, including camshaft 2,
Relief cam 10, the ring flange 1 being sleeved on camshaft 2 and bearing 3, further include automatic pressure-reducing device 4, and automatic pressure-reducing device 4 is set with
On camshaft 2 between relief cam 10 and bearing 3, automatic pressure-reducing device 4 is set to the both ends of camshaft 2 with ring flange 1；From
Dynamic pressure reducer 4 includes automatic pressure-reducing device ontology 9, gets rid of block 5, automatic pressure-reducing bar 6, pull pin 7 and spring 8,9 sets of automatic pressure-reducing device ontology
It is rotated synchronously on camshaft 2, and with camshaft 2；It is semicircular structure to get rid of block 5, and one end is connect with spring 8, and the other end is
Free end, connection pull pin 7, and 8 other end of spring is fixed on automatic pressure-reducing device ontology 9；It pulls pin 7 connection automatic pressure-reducing bars 6.It is sending out
When motivation moves, camshaft 2 rotates, and gets rid of the centrifugal force of block 5 more than the elastic force of itself of spring 8, gets rid of block 5 and surrounded under effect of inertia
Fixed one end rotates, to drive 7 rotations of pulling pin.
Pull pin 7 working range be less than 180 degree.
Spring 8 is extension spring structure, gets rid of and is provided with spring connecting hole 11 on block 5, and spring 8 is got rid of by the connection of spring connecting hole 11
Block 5.Wherein, spring 8 can also be torsional spring structure；When camshaft 2 rotates, getting rid of when block 5 rotates has centrifugal force, when acceleration is revolved
When turning, centrifugal force gets rid of block 5 and flies out more than the elastic force of itself of spring 8, and when being rotated in deceleration, centrifugal force is less than the bullet of itself of spring 8
Power gets rid of 5 return of block.
Automatic pressure-reducing device ontology 9 is internally provided with slot (not indicated in attached drawing), and automatic pressure-reducing bar 6 is set in slot,
Block 5 is got rid of to be rotatably connected on automatic pressure-reducing device ontology 9 by rivet.Automatic pressure-reducing bar 6 rotates freely in slot, rotation angle
Less than 180 degree.
There are two bearings 3, is set in the both ends of camshaft 2.
A kind of operation principle of the camshaft with automatic pressure-reducing device of the present invention：As shown in Fig. 3, when camshaft 2 makees the inverse time
When needle accelerates rotary motion, 2 rotating speed of camshaft is more than 500 turns, gets rid of block 5 and is flown out according to inertia, drives 7 rotations of pulling pin, 7 bands of pulling pin
Dynamic bias automatic pressure-reducing bar 6 rotates, and automatic pressure-reducing bar 6 is less than 10 outer rim of relief cam, the normal intake and exhaust of exhaust valve；Conversely, working as
When 2 retarded motion of camshaft, 5 return of block is got rid of, drives 7 rotations of pulling pin, 7 drive bias automatic pressure-reducing bars 6 of pulling pin rotation, camshaft
2 rotating speeds are less than 500 turns, and automatic pressure-reducing bar 6 is made to be higher than 10 outer rim of relief cam, and exhaust valve is in a deflated state.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, all within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should all include
Within protection scope of the present invention.
Claims (7)
1. a kind of camshaft with automatic pressure-reducing device, including camshaft, relief cam, the ring flange and axis being sleeved on camshaft
It holds, it is characterised in that：Further include automatic pressure-reducing device, the automatic pressure-reducing device is set in convex between the relief cam and bearing
On wheel shaft, the automatic pressure-reducing device is set to the both ends of the camshaft with the ring flange；The automatic pressure-reducing device includes certainly
Dynamic pressure reducer ontology gets rid of block, automatic pressure-reducing bar, pulls pin and spring, the automatic pressure-reducing device body fits on the camshaft,
And it is rotated synchronously with the camshaft；The block that gets rid of is semicircular structure, and one end is connect with the spring, and the other end is freely
It holds, pulls pin described in connection, the spring other end is fixed on the automatic pressure-reducing device ontology；The connection of pulling pin is described automatic
Decompression lever.
2. a kind of camshaft with automatic pressure-reducing device as described in claim 1, it is characterised in that：The working range pulled pin is
Less than 180 degree.
3. a kind of camshaft with automatic pressure-reducing device as described in claim 1, it is characterised in that：The spring is extension spring structure,
Described get rid of is provided with spring connecting hole on block, the spring described in spring connecting hole connection by getting rid of block.
4. a kind of camshaft with automatic pressure-reducing device as described in claim 1, it is characterised in that：In the automatic pressure-reducing device ontology
Grooved hole is arranged in portion, and the automatic pressure-reducing bar is set in the slot.
5. a kind of camshaft with automatic pressure-reducing device as described in claim 1, it is characterised in that：The block that gets rid of is rotated by rivet
It is connected on automatic pressure-reducing device ontology.
6. a kind of camshaft with automatic pressure-reducing device as described in claim 1, it is characterised in that：There are two the bearings, respectively
It is set in the both ends of the camshaft.
7. a kind of engine, it is characterised in that including any camshaft with automatic pressure-reducing device of claim 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810498848.XA CN108547677A (en) | 2018-05-23 | 2018-05-23 | A kind of camshaft with automatic pressure-reducing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810498848.XA CN108547677A (en) | 2018-05-23 | 2018-05-23 | A kind of camshaft with automatic pressure-reducing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108547677A true CN108547677A (en) | 2018-09-18 |
Family
ID=63495516
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810498848.XA Pending CN108547677A (en) | 2018-05-23 | 2018-05-23 | A kind of camshaft with automatic pressure-reducing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108547677A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202300565U (en) * | 2011-11-01 | 2012-07-04 | 重庆宗申发动机制造有限公司 | Pressure reducing valve for camshaft |
| CN105756741A (en) * | 2014-12-18 | 2016-07-13 | 肖瑶 | Engine camshaft |
| CN206346796U (en) * | 2016-12-27 | 2017-07-21 | 浙江金浪动力有限公司 | The mechanism of decompressor of engine |
| CN208686445U (en) * | 2018-05-23 | 2019-04-02 | 力帆实业(集团)股份有限公司 | A kind of camshaft with automatic pressure-reducing device |
-
2018
- 2018-05-23 CN CN201810498848.XA patent/CN108547677A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202300565U (en) * | 2011-11-01 | 2012-07-04 | 重庆宗申发动机制造有限公司 | Pressure reducing valve for camshaft |
| CN105756741A (en) * | 2014-12-18 | 2016-07-13 | 肖瑶 | Engine camshaft |
| CN206346796U (en) * | 2016-12-27 | 2017-07-21 | 浙江金浪动力有限公司 | The mechanism of decompressor of engine |
| CN208686445U (en) * | 2018-05-23 | 2019-04-02 | 力帆实业(集团)股份有限公司 | A kind of camshaft with automatic pressure-reducing device |
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