CN205349456U - Engine start relief pressure valve mechanism - Google Patents
Engine start relief pressure valve mechanism Download PDFInfo
- Publication number
- CN205349456U CN205349456U CN201620151393.0U CN201620151393U CN205349456U CN 205349456 U CN205349456 U CN 205349456U CN 201620151393 U CN201620151393 U CN 201620151393U CN 205349456 U CN205349456 U CN 205349456U
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- China
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- camshaft
- relief cam
- engine start
- valve mechanism
- decompressor
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Abstract
The utility model provides an engine start relief pressure valve mechanism, driven sprocket, relief cam, pressure reducer seat, centrifugation fly the piece including camshaft, right time, the terminal surface that driven sprocket set up at the camshaft right time passes through chain and the crankshaft, the pressure reducer seat compresses tightly above the chain to fix on the camshaft through the locating pin, the centrifugation flies the piece and fixes on the pressure reducer seat to be connected with reset spring, wherein, it is provided with the spout to fly the piece in the centrifugation, the relief cam passes driven sprocket and pressure reducer seat in right time, and the relief cam is cylindrical, and the spout that the centrifugation flew the piece is inserted to the one end of relief cam through the cylindric lock in, the other end of relief cam is installed on the camshaft and is stretched into the base circle position of camshaft. The utility model discloses an engine start relief pressure valve mechanism overall structure is ingenious, simple installation, reliable operation.
Description
Technical field
This utility model relates to engine start technical field, more specifically, relates to a kind of engine start pressure-reducing valve mechanism.
Background technology
Along with the fast development of show business, Mountaineering vehicle, ski bob etc. constantly raid market, and the large-duty engine demand of its configuration is also increasing, and has driven the progress of engine technology therewith.Owing to the in-cylinder pressure of large-duty engine is big, its startup reliability is poor and easily breaks down, so must flow through relief valve unit to carry out pressure release, reaches easily to start or hand pull starting-up under adverse circumstances.
A lot of pressure-reducing valve mechanisms are all coordinate with camshaft at present, fly, by centrifugal, the circular motion that block fixes；The shortcomings such as its mechanism is complex, effect of easing stress is poor, high speed lower mechanism of decompressor abrasion is very fast, it is difficult to meet the requirement of the electromotor such as ski bob, racing vehicle.
In sum, for solving the problems referred to above, it is desirable to provide a kind of new camshaft reducing valve mechanism.
Utility model content
In view of the above problems, the purpose of this utility model is to provide a kind of engine start pressure-reducing valve mechanism, and overall structure is ingenious, simple installation, reliable operation.
This utility model provides a kind of engine start pressure-reducing valve mechanism, including camshaft, timing driven sprocket, relief cam, decompressor seat, centrifugal flies block；Wherein,
Described timing driven sprocket is arranged on the end face of described camshaft and is connected with bent axle by chain；
Described decompressor seat is pressed in above described chain, and is fixed on described camshaft by alignment pin；
Described centrifugal fly block and be fixed on described decompressor seat, and be connected to back-moving spring；Wherein, centrifugal fly block described and be provided with chute；
Described relief cam is through described timing driven sprocket and described decompressor seat, wherein,
Described relief cam is cylindrical, and one end of described relief cam is inserted in the described centrifugal chute flying block by straight pin, and the other end of described relief cam is arranged on described camshaft and stretches into the base circle position of described camshaft.
Furthermore it is preferred that scheme be described centrifugal fly block and be fixed on described decompressor seat by rivet.
Furthermore it is preferred that scheme be on described camshaft, be provided with installing hole, the other end of described relief cam is arranged on described camshaft by described installing hole.
Furthermore it is preferred that scheme be centrifugal fly block and described decompressor seat is fixed on described timing driven sprocket by screw and pad by described.
From technical scheme above, the engine start pressure-reducing valve mechanism that this utility model provides, increase or improve the startup device of electromotor, when startup motor breaks down or startup motor normally cannot start electromotor under the extreme condition such as mountain region and snowfield, this device is it can be avoided that produce bigger rotating inertia force and shock loading with camshaft when relief cam collides, ensure that the stability of the mechanism of decompressor, it is ensured that the reliability of engine start.
In order to realize above-mentioned and relevant purpose, one or more aspects of the present utility model include the feature that will be explained in below and be particularly pointed out in the claims.Description below and accompanying drawing describe some illustrative aspects of the present utility model in detail.But, some modes in the various modes that only can use principle of the present utility model of these aspects instruction.Additionally, this utility model is intended to include all these aspects and their equivalent.
Accompanying drawing explanation
By the content of the reference explanation below in conjunction with accompanying drawing and claims, and along with being more fully understood from of the present utility model, other purpose of the present utility model and result will be more apparent and should be readily appreciated that.In the accompanying drawings:
Fig. 1 is the decomposition texture schematic diagram of the engine start pressure-reducing valve mechanism according to this utility model embodiment；
Fig. 2 is the structural representation of the engine start pressure-reducing valve mechanism according to this utility model embodiment；
Fig. 3 is that the centrifugal of the engine start pressure-reducing valve mechanism according to this utility model embodiment flies block structure schematic diagram；
The mechanism of decompressor schematic diagram during engine stop of Fig. 4-1 and engine start pressure-reducing valve mechanism that Fig. 4-2 is this utility model embodiment；
Fig. 5-1 and the electromotor that Fig. 5-2 is this utility model embodiment start the mechanism of decompressor schematic diagram during electromotor work of pressure-reducing valve mechanism.
Accompanying drawing labelling therein includes: camshaft 1, relief cam 2, timing driven sprocket 3, straight pin 4, decompressor seat 5, centrifugal fly block 6, chute 61, pad 7, screw 8, rivet 9, back-moving spring 10, alignment pin 11.
Label identical in all of the figs indicates similar or corresponding feature or function.
Detailed description of the invention
In the following description, for purposes of illustration, in order to provide the comprehensive understanding to one or more embodiments, many details are elaborated.It may be evident, however, that these embodiments can also be realized when not having these details.
The problem such as complex based on the traditional engine start pressure-reducing valve mechanism being previously mentioned, effect of easing stress is poor, lower mechanism of decompressor abrasion is very fast at a high speed, this utility model provides a kind of new engine start pressure-reducing valve mechanism, its technical scheme principle is: during engine start, relief cam stretches into cam base circle, and higher than base circle position, thus jack-up exhaust valve, reducing cylinder pressure of engines, now electromotor is just more prone to start；After starting, crank rotation passes through chain-driving timing sprocket and cam axle, centrifugal fly block and overcome the elastic force of back-moving spring to do centrifugal motion under the influence of centrifugal force, drive relief cam to axially move by the centrifugal chute flown on block and leave camshaft basic circle, it is ensured that valve is closed；When electromotor to stop, the centrifugal elastic force flying back-moving spring suffered by block is more than centrifugal force, and the centrifugal block that flies playback and pass through chute and drives relief cam to enter camshaft base circle position, reduces pressure during convenient startup next time.
Below with reference to accompanying drawing, specific embodiment of the utility model is described in detail.
In order to the structure of engine start pressure-reducing valve mechanism that this utility model provides is described, engine start pressure-reducing valve mechanism has been carried out exemplary sign by Fig. 1 to Fig. 5-2 respectively from different perspectives.Specifically, Fig. 1 illustrates the decomposition texture of the engine start pressure-reducing valve mechanism according to this utility model embodiment；Fig. 2 illustrates the structure of the engine start pressure-reducing valve mechanism according to this utility model embodiment；Fig. 3 illustrates that the centrifugal of engine start pressure-reducing valve mechanism according to this utility model embodiment flies block structure；Fig. 4-1 and Fig. 4-2 illustrates the mechanism of decompressor during engine stop of the engine start pressure-reducing valve mechanism of this utility model embodiment；Fig. 5-1 and Fig. 5-2 illustrates that the electromotor of this utility model embodiment starts the mechanism of decompressor during electromotor work of pressure-reducing valve mechanism.
As Fig. 1 to Fig. 3 jointly shown in, the engine start pressure-reducing valve mechanism that this utility model provides includes: camshaft 1, relief cam 2, timing driven sprocket 3, straight pin 4, decompressor seat 5, centrifugal fly block 6, chute 61, pad 7, screw 8, rivet 9, back-moving spring 10, alignment pin 11；Wherein, timing driven sprocket 3 is arranged on the end face of camshaft 1 and is connected with bent axle by chain；Decompressor seat 5 is pressed in above chain, and is fixed on camshaft 1 by alignment pin 11；Centrifugal fly block 6 and be fixed on decompressor seat 5, and be connected to back-moving spring 10；Wherein, fly block 6 be provided with chute 61 centrifugal；Relief cam 2 traverse timing driven sprocket 3 and decompressor seat 5, wherein, relief cam 2 is cylindrical, and one end of relief cam 2 is inserted in the centrifugal chute 61 flying block 6 by straight pin 11, and the other end of relief cam 2 is arranged on camshaft 1 and stretches into the base circle position of camshaft 1.
Wherein, centrifugal fly block 6 and be fixed on decompressor seat 5 by rivet.Being provided with installing hole on camshaft 1, the other end of relief cam 2 is arranged on camshaft 1 by installing hole.Fly block 6 and decompressor seat 5 is fixed on timing driven sprocket 3 by screw 8 and pad 9 by centrifugal, by screw 8 and pad 7, whole decompressor is fixed up.
Shown in as common in Fig. 4-1 and Fig. 4-2, during engine stop work, relief cam 2 stretches into the base circle position of camshaft 1, and the face of cylinder is higher than basic circle surface, backs down exhaust valve, reaches pressurization purpose；Now relief cam 2, centrifugal fly block 6, straight pin 4, back-moving spring 10 state be respectively at position as shown in Fig. 4-1 and Fig. 4-2.
Shown in as common in Fig. 5-1 and Fig. 5-2, during electromotor work, relief cam 2 is flown block 6 effect leave the base circle position of camshaft 1 by centrifugal, would not affect contacting of rocking arm and camshaft 1, it is ensured that valve closing；Now relief cam 2, centrifugal fly block 6, straight pin 4, back-moving spring 10 state be respectively at position as shown in Fig. 5-1 and Fig. 5-2.
The operation principle of the engine start pressure-reducing valve mechanism that this utility model provides is as follows: the startup device band dynamic crankshaft on electromotor rotates, bent axle is rotated through chain-driving timing sprocket 3 and camshaft 1 rotates, now relief cam 2 is the basic circle stretching into camshaft 1, and higher than base circle position, thus jack-up exhaust valve, compression gas, by decompressor pressure release, reduces cylinder pressure, makes electromotor be prone to start.After starting, camshaft 1 rotarily drives decompressor seat 5 mounted thereon and rotates, now centrifugal fly block 6 and do centrifugal rotation under the influence of centrifugal force, the basic circle that centrifugal chute 61 mechanism flown on block 6 drives relief cam 2 to move from camshaft 1, exhaust valve closing, makes the valve actuating mechanism normal operation of electromotor.After engine misses, due to the effect of back-moving spring 10, relief cam 2 can stretch into camshaft base circle position, pressure release when convenient next time starts again.
Wherein it is desired to illustrating is that the relief cam 3 used by chute 61, decompressor is cylinder, is no longer that angled flat is made in front end.Relief cam 3 is that chute 61 coordinates with the centrifugal fit system flying block 6.The motion mode of relief cam 3 is no longer the circular motion around cam base circle, but stretches into the basic circle of camshaft and the rectilinear motion of the basic circle exiting camshaft.Decompressor and timing driven sprocket 3 can be monolithic constructions；Relief cam 2 is driven to stretch into or exit the basic circle of camshaft 1 to reach decompression purpose.
According to above-mentioned operation principle, the advantage that this utility model is better than other pressure-reducing valve mechanism is as follows: when centrifugal fly block rotate time, relief cam no longer moves in a circle, but do axial rectilinear motion, avoid running up down and occur to clash into fracture and abrasion with camshaft, ensure service life, save cost.Relief cam, without making flat again, so flat angle and the height of complexity need not be calculated, is manufactured difficulty and is also decreased, and its diameter can also somewhat do greatly simultaneously, improves the performance of the whole mechanism of decompressor.Camshaft is installed the place of relief cam without processing (groove), directly can casting, and the decompression height needed is controlled by the diameter jack-up exhaust valve of relief cam, it is to avoid the procedure of processing of this place's high-precision requirement.Relief cam do not collide with camshaft, it is to avoid noise during engine start.Decompressor and timing driven sprocket can be monolithic constructions.
Be can be seen that by above-mentioned embodiment, the engine start pressure-reducing valve mechanism that this utility model provides, increase or improve the startup device of electromotor, when startup motor breaks down or startup motor normally cannot start electromotor under the extreme condition such as mountain region and snowfield, this device is it can be avoided that produce bigger rotating inertia force and shock loading with camshaft when relief cam collides, ensure that the stability of the mechanism of decompressor, it is ensured that the reliability of engine start.
Describe in an illustrative manner above with reference to accompanying drawing according to the engine start pressure-reducing valve mechanism that the utility model proposes.It will be understood by those skilled in the art, however, that for the proposed engine start pressure-reducing valve mechanism of above-mentioned this utility model, it is also possible on the basis without departing from this utility model content, make various improvement.Therefore, protection domain of the present utility model should be determined by the content of appending claims.
Claims (4)
1. an engine start pressure-reducing valve mechanism, including camshaft, timing driven sprocket, relief cam, decompressor seat, centrifugal flies block；It is characterized in that,
Described timing driven sprocket is arranged on the end face of described camshaft and is connected with bent axle by chain；
Described decompressor seat is pressed in above described chain, and is fixed on described camshaft by alignment pin；
Described centrifugal fly block and be fixed on described decompressor seat, and be connected to back-moving spring；Wherein, centrifugal fly block described and be provided with chute；
Described relief cam is through described timing driven sprocket and described decompressor seat, wherein,
Described relief cam is cylindrical, and one end of described relief cam is inserted in the described centrifugal chute flying block by straight pin, and the other end of described relief cam is arranged on described camshaft and stretches into the base circle position of described camshaft.
2. engine start pressure-reducing valve mechanism as claimed in claim 1, it is characterised in that
Described centrifugal fly block and be fixed on described decompressor seat by rivet.
3. engine start pressure-reducing valve mechanism as claimed in claim 1, it is characterised in that
Being provided with installing hole on described camshaft, the other end of described relief cam is arranged on described camshaft by described installing hole.
4. engine start pressure-reducing valve mechanism as claimed in claim 1, it is characterised in that
Centrifugal block is flown and described decompressor seat is fixed on described timing driven sprocket by described by screw and pad.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620151393.0U CN205349456U (en) | 2016-02-29 | 2016-02-29 | Engine start relief pressure valve mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620151393.0U CN205349456U (en) | 2016-02-29 | 2016-02-29 | Engine start relief pressure valve mechanism |
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| CN205349456U true CN205349456U (en) | 2016-06-29 |
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| CN201620151393.0U Withdrawn - After Issue CN205349456U (en) | 2016-02-29 | 2016-02-29 | Engine start relief pressure valve mechanism |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105569761A (en) * | 2016-02-29 | 2016-05-11 | 重庆高金实业有限公司 | Engine start pressure-reducing valve mechanism |
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2016
- 2016-02-29 CN CN201620151393.0U patent/CN205349456U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105569761A (en) * | 2016-02-29 | 2016-05-11 | 重庆高金实业有限公司 | Engine start pressure-reducing valve mechanism |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160629 Effective date of abandoning: 20171208 |