CN103089367B - Motor tricycle engine decompression starting mechanism - Google Patents
Motor tricycle engine decompression starting mechanism Download PDFInfo
- Publication number
- CN103089367B CN103089367B CN201310051239.7A CN201310051239A CN103089367B CN 103089367 B CN103089367 B CN 103089367B CN 201310051239 A CN201310051239 A CN 201310051239A CN 103089367 B CN103089367 B CN 103089367B
- Authority
- CN
- China
- Prior art keywords
- cam
- decompression
- driven gear
- base circle
- centrifugal
- 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.)
- Expired - Fee Related
Links
Landscapes
- Valve Device For Special Equipments (AREA)
Abstract
The invention discloses a motor tricycle engine decompression starting mechanism. An axial arch-shaped groove is formed in the surface of a base circle of a cam and extends to an extension section of the base circle of the cam. An arc-shaped groove corresponding to the arc-shaped groove in the extension section of the base circle of the cam is formed in an inner hole wall of a timing driven gear, a round hole is formed by enclosure of the two arc-shaped grooves, and a decompression eccentric pin is arranged in the round hole. One end of the decompression eccentric pin penetrates out of the round hole and is placed in the arc-shaped groove in the surface of the base circle of the cam, the other end of the decompression eccentric pin penetrates out of the timing driven gear and then is connected with an eccentric block, and a reset spring is arranged between the eccentric block and the timing driven gear. One section of the decompression eccentric pin, placed in the arc-shaped groove in the surface of the base circle of the cam, is provided with an eccentric portion, when the eccentric block is in a reset state, the eccentric portion protrudes out of the surface of the base circle of the cam and ejects a lower rocker arm which controls an exhaust valve to open. The motor tricycle engine decompression starting mechanism can greatly reduce engine starting difficulty, and is beneficial for popularization and market acceptability of large-discharge motor tricycles.
Description
Technical field
The present invention relates to the improvement of motorcycle engine priming technique, specifically refer to a kind of engine for motorcycle decompression starting mechanism, belong to technical field of engines.
Background technique
Nearly 2 years, along with the enforcement of central rich peasant's policy and strategy to develop western regions, motor tricycle became the good assistant that friend peasant gets rich.Tricycle market is also more and more higher to the power character requirement of motor at present, and motor is also more and more to large discharge capacity future development.Along with the increase of engine displacement, more and more higher to the requirement of motor, engine failure rate also increases thereupon, and in all faults, starting problem becomes subject matter, no matter be that electricity starts or pin starts all more difficult.The main cause of difficulty in starting is the increase along with engine displacement, and cylinder diameter and piston area increase, the stressed increase of piston, and when startup, cylinder pressure is just large, and the recoil force of engine start is larger, therefore difficulty in starting.
Summary of the invention
For prior art above shortcomings, the object of the present invention is to provide a kind of startup to be easy to engine for motorcycle decompression starting mechanism.
To achieve these goals, the technical solution used in the present invention is such:
One engine for motorcycle decompression starting mechanism, comprises timing driven gear wheel, cam and camshaft, and cam is enclosed within on camshaft, and timing driven gear wheel is sleeved on cam base circle prolonged section and passes through retainer ring spacing; It is characterized in that: be provided with axial curve bath on cam base circle surface, this curve bath extends on cam base circle prolonged section, on timing driven gear wheel inner hole wall, be provided with the curve bath corresponding with cam base circle prolonged section curve bath position, two curve baths surround formation circular hole, are provided with rotating decompression cam pin in this circular hole; Decompression cam pin one end passes and is positioned at the curve bath on cam base circle surface from circular hole, the decompression cam pin the other end is connected with centrifugal-block from timing driven gear wheel passes, this centrifugal-block is arranged in timing driven gear wheel counterbore, between centrifugal-block and timing driven gear wheel, is provided with the Returnning spring that centrifugal-block is resetted; Decompression cam pin is positioned at that section of cam base circle surface curve bath and has an eccentric part, when centrifugal-block is during in reset mode, and the lower shake-changing arm jack-up that eccentric part protrudes from cam base circle surface and control exhaust valve is opened; In the time that centrifugal-block overcomes action of reset spring power in apocarpy, eccentric part is positioned at axial groove completely; It is 0.3～0.8mm that decompression cam pin eccentric part protrudes from cam base circle surface maximum height; Under cam maximum lift point court time, decompression cam pin vertical direction angle relative to cam center line is 16 °～26 °.
Further, in the arc that described centrifugal-block and timing driven gear wheel contact that section and timing driven gear wheel, counterbore arc is in the same size, and while ensureing engine operation, two circular arcs are fitted well.
As a kind of structural type of Returnning spring and mounting type, described Returnning spring is torsion spring, Returnning spring is enclosed within on spring fixing pin, spring fixing pin adopts riveting method to be connected with timing driven gear wheel, Returnning spring one end is arranged in timing driven gear wheel hole, and the other end is arranged in the breach of centrifugal-block below.
The offset of described decompression cam pin eccentric part is 0.5～2mm.
Under cam maximum lift point court time, lower shake-changing arm is 52.5 ° with the point of contact vertical direction angle relative to cam center line of cam.
In the time of engine start, engine speed is lower than 1000r/min, the rotating speed of timing driven gear wheel is lower than 500r/min, now centrifugal-block under the effect of Returnning spring in reset mode, and decompression cam pin under reset mode is in running order, the cam pin eccentric part that reduces pressure protrudes from cam base circle surface, thereby exhaust valve is opened lower shake-changing arm jack-up, thereby the cylinder pressure while reducing engine start, makes startup become easy.In the time of engine work, the minimum idling of motor is generally more than 1200r/min, be greater than the twice that the rotating speed of centrifugal-block when centrifugal requires, the active force that now centrifugal-block overcomes Returnning spring is in apocarpy, when centrifugal-block is during in apocarpy, decompression cam pin eccentric part is positioned at axial groove completely and is not projected on cam base circle surface, and motor is in normal working.Therefore under the cooperation of decompression cam pin and associated components, the present invention can obviously reduce engine start difficulty, is more conducive to popularization and the market acceptance of large discharge capacity motor tricycle.
Brief description of the drawings
Fig. 1-structural representation of the present invention.
Fig. 2-Fig. 1 left view.
Fig. 3-decompression cam pin amplification assumption diagram.
Fig. 4-Fig. 3 left view.
Fig. 5-the present invention's cam pin that reduces pressure is about to enter working state figure.
Fig. 6-the present invention's cam pin working state figure that reduces pressure.
Cam pin location state diagram reduces pressure when Fig. 7-engine work.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
The object of engine for motorcycle decompression starting of the present invention mechanism is the recoil force in order to reduce engine start, makes to start to be more prone to.Its structure is shown in Fig. 1 and Fig. 2, comprises timing driven gear wheel 1, cam 2 and camshaft, and cam is enclosed within on camshaft, and it is also spacing by back-up ring 3 that timing driven gear wheel 1 adopts little Spielpassung to be sleeved on cam 2 basic circle prolonged sections.Be provided with axial curve bath 10 on cam base circle surface, this curve bath 10 extends on cam base circle prolonged section, on timing driven gear wheel inner hole wall, be provided with the curve bath corresponding with cam base circle prolonged section curve bath position, two curve baths surround formation circular hole, are provided with rotating decompression cam pin 4 in this circular hole.Decompression cam pin 4 one end pass and are positioned at the curve bath 10 on cam base circle surface from circular hole, decompression cam pin 4 the other ends are connected with centrifugal-block 5 from circular hole passes, this centrifugal-block 5 is arranged in timing driven gear wheel counterbore 11, between centrifugal-block 5 and timing driven gear wheel 1, is provided with the Returnning spring 6 that centrifugal-block is resetted.Decompression cam pin 4 is positioned at cam base circle surface curve bath 10 those sections and has an eccentric part 7, when centrifugal-block is during in reset mode, and lower shake-changing arm 8 jack-up that eccentric part 7 protrudes from cam base circle surface and control exhaust valve is opened; In the time that centrifugal-block overcomes action of reset spring power in apocarpy, eccentric part 7 is positioned at axial groove 10 completely.It is 0.3～0.8mm that decompression cam pin eccentric part protrudes from cam base circle surface maximum height d; Under cam maximum lift point court time, decompression cam pin vertical direction angle theta 1 relative to cam center line is 16 °～26 °.Under cam maximum lift point court time, lower shake-changing arm is 52.5 ° with the point of contact vertical direction angle theta 2 relative to cam center line of cam.
Decompression eccentric pin structure as shown in Figure 3 and Figure 4, is mainly divided into three sections: intermediate section is for coordinating with circular hole, therefore be cylindric; The right Duan Weiyu centrifugal-block coordinates riveting portion, and this position is flat side, and flat side is placed in the flat square hole of centrifugal-block and riveted joint is fixed, and when centrifugal-block is changed between apocarpy and reset mode, can drive decompression cam pin to rotate; Left-hand component, for for eccentric part 7, is groundwork position, and offset d1 is set between 0.5～2mm.
Because centrifugal-block is meeting counterbore wall laminating in taking turns with timing driven gear because of centrifugal force in the time of engine work, therefore the arc radius R2 that centrifugal-block 5 and timing driven gear wheel contact that section by the present invention is processed as with the interior counterbore arc radius R1 of timing driven gear wheel in the same size, while ensureing engine operation like this, two circular arc laminatings are good.
As a kind of structural type of Returnning spring and mounting type, described Returnning spring 6 is torsion spring, and Returnning spring 6 is enclosed within on spring fixing pin 9, and spring fixing pin 9 adopts riveting method to be connected with timing driven gear wheel 1, spring fixing pin has a spacing head, prevents that Returnning spring from coming off.Returnning spring one end is arranged in timing driven gear and takes turns the hole of offering, and the other end is arranged in the breach of centrifugal-block below.Based on the meaning that arranges of Returnning spring, therefore Returnning spring can be also extension spring, centrifugal-block head is drawn toward center; Or be stage clip, centrifugal-block head is pushed away toward center, in a word with centrifugal force opposite direction.
The present invention realizes the easy principle of engine start by decompression cam pin: in the time of engine start, engine speed is lower than 1000r/min, the rotating speed of timing driven gear wheel is lower than 500r/min, now centrifugal-block 5 under the effect of Returnning spring 6 in reset mode, and decompression cam pin under reset mode is in running order, the cam pin eccentric part 7 that reduces pressure protrudes from cam base circle surface, thereby exhaust valve is opened lower shake-changing arm 8 jack-up, see Fig. 6, Fig. 5 is that decompression cam pin is about to enter working state figure, therefore the cylinder pressure can reduce engine start time, make to start and become easy.In the time of engine work, the minimum idling of motor is generally more than 1200r/min, be greater than the twice that the rotating speed of centrifugal-block when centrifugal requires, the effect that now centrifugal-block 5 overcomes Returnning spring 6 is in apocarpy, when centrifugal-block is during in apocarpy, decompression cam pin eccentric part 7 is positioned at curve bath 10 completely and is not projected on cam base circle surface, see Fig. 7, decompression cam pin 4 is inoperative, and therefore motor can normally be worked.Therefore under the cooperation of decompression cam pin and associated components, the present invention can obviously reduce engine start difficulty.
The present invention is reduced pressure the engine speed in cam pin when work much larger than the minimum continuous ignition rotating speed of motor 200r/min, and is less than the minimum idling of motor, object is set can reaches of the cam pin that therefore reduces pressure.
Finally explanation is, above embodiment is only unrestricted in order to technological scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement technological scheme of the present invention, and not departing from aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of claim scope of the present invention.
Claims (5)
1. an engine for motorcycle decompression starting mechanism, comprises timing driven gear wheel (1), cam (2) and camshaft, and cam is enclosed within on camshaft, and timing driven gear wheel (1) is sleeved on cam base circle prolonged section also spacing by back-up ring (3); It is characterized in that: be provided with axial curve bath (10) on cam base circle surface, this curve bath extends on cam base circle prolonged section, on timing driven gear wheel inner hole wall, be provided with the curve bath corresponding with cam base circle prolonged section curve bath position, two curve baths surround formation circular hole, are provided with rotating decompression cam pin (4) in this circular hole; Decompression cam pin one end passes and is positioned at the curve bath on cam base circle surface from circular hole, decompression cam pin (4) the other end is connected with centrifugal-block (5) from timing driven gear wheel passes, this centrifugal-block is arranged in timing driven gear wheel counterbore (11), between centrifugal-block (5) and timing driven gear wheel (1), is provided with the Returnning spring (6) that centrifugal-block is resetted; Decompression cam pin (4) is positioned at that section of cam base circle surface curve bath and has an eccentric part (7), when centrifugal-block is during in reset mode, and lower shake-changing arm (8) jack-up that eccentric part (7) protrudes from cam base circle surface and control exhaust valve is opened; In the time that centrifugal-block overcomes action of reset spring power in apocarpy, eccentric part is positioned at axial groove completely; It is 0.3～0.8mm that decompression cam pin eccentric part protrudes from cam base circle surface maximum height; Under cam maximum lift point court time, decompression cam pin vertical direction angle relative to cam center line is 16 °～26 °.
2. engine for motorcycle decompression starting according to claim 1 mechanism, is characterized in that: it is in the same size that described centrifugal-block (5) contact that section arc with timing driven gear wheel and timing driven gear are taken turns interior counterbore (11) arc.
3. engine for motorcycle decompression starting according to claim 1 mechanism, it is characterized in that: described Returnning spring (6) is torsion spring, Returnning spring (6) is enclosed within on spring fixing pin (9), spring fixing pin (9) adopts riveting method to be connected with timing driven gear wheel (1), Returnning spring (6) one end is arranged in timing driven gear wheel hole, and the other end is arranged in the breach of centrifugal-block (5) below.
4. engine for motorcycle decompression starting according to claim 1 mechanism, is characterized in that: the offset of described decompression cam pin eccentric part (7) is 0.5～2mm.
5. engine for motorcycle decompression starting according to claim 1 mechanism, is characterized in that: when cam maximum lift point towards under time, lower shake-changing arm is 52.5 ° with the point of contact vertical direction angle relative to cam center line of cam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310051239.7A CN103089367B (en) | 2013-02-16 | 2013-02-16 | Motor tricycle engine decompression starting mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310051239.7A CN103089367B (en) | 2013-02-16 | 2013-02-16 | Motor tricycle engine decompression starting mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103089367A CN103089367A (en) | 2013-05-08 |
| CN103089367B true CN103089367B (en) | 2014-08-13 |
Family
ID=48202409
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310051239.7A Expired - Fee Related CN103089367B (en) | 2013-02-16 | 2013-02-16 | Motor tricycle engine decompression starting mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103089367B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018142312A1 (en) * | 2017-02-01 | 2018-08-09 | Tvs Motor Company Limited | Cylinder head for an internal combustion engine |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103334810B (en) * | 2013-07-05 | 2016-02-10 | 力帆实业(集团)股份有限公司 | Engine for motorcycle decompression starting mechanism |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4615313A (en) * | 1983-08-10 | 1986-10-07 | Kawasaki Jukogyo Kabushiki Kaisha | Automatic decompression device for internal combustion engine |
| CN102482961A (en) * | 2009-09-14 | 2012-05-30 | 本田技研工业株式会社 | Valve gear of internal combustion engine |
| CN203114372U (en) * | 2013-02-16 | 2013-08-07 | 力帆实业(集团)股份有限公司 | Decompression starting mechanism of engine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001090516A (en) * | 1999-09-21 | 2001-04-03 | Kubota Corp | Engine with decompressor |
-
2013
- 2013-02-16 CN CN201310051239.7A patent/CN103089367B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4615313A (en) * | 1983-08-10 | 1986-10-07 | Kawasaki Jukogyo Kabushiki Kaisha | Automatic decompression device for internal combustion engine |
| CN102482961A (en) * | 2009-09-14 | 2012-05-30 | 本田技研工业株式会社 | Valve gear of internal combustion engine |
| CN203114372U (en) * | 2013-02-16 | 2013-08-07 | 力帆实业(集团)股份有限公司 | Decompression starting mechanism of engine |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2001-090516A 2001.04.03 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018142312A1 (en) * | 2017-02-01 | 2018-08-09 | Tvs Motor Company Limited | Cylinder head for an internal combustion engine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103089367A (en) | 2013-05-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103089367B (en) | Motor tricycle engine decompression starting mechanism | |
| CN203114372U (en) | Decompression starting mechanism of engine | |
| CN103807015B (en) | A kind of high fuel-efficient engine | |
| CN104500241B (en) | Variable compression ratio engine | |
| CN107701253B (en) | A kind of rocker arm body | |
| CN203383871U (en) | Labor-saving motor tricycle engine starting mechanism | |
| CN103334810B (en) | Engine for motorcycle decompression starting mechanism | |
| JPS58500211A (en) | innate agency | |
| CN103953414A (en) | Variable timing system of engine valve | |
| CN104612825B (en) | Engine with variable compression ratio | |
| CN104088751A (en) | Electrohydraulic motor | |
| CN208106589U (en) | Engine cylinder head and engine assembly | |
| CN202832685U (en) | Engine and camshaft thereof | |
| CN106014657A (en) | Instantaneous rotation speed energy-saving control method for electronic control diesel engine of loading machine | |
| CN202628350U (en) | Electric control single-cylinder fuel injection pump | |
| CN201241741Y (en) | Engine cam axle assembly with pressure relief valve | |
| CN104791092A (en) | Variable compression ratio engine | |
| CN209067298U (en) | Single-cylinder air-cooled diesel engine camshaft | |
| CN203476425U (en) | Automobile electric rotor type oil pump | |
| CN204532458U (en) | Motor decompression starting system | |
| CN107109976B (en) | Camshaft with decompressor | |
| CN104847435B (en) | Valve actuating mechanism, engine and the vehicle of engine | |
| CN104500242B (en) | Variable compression ratio engine | |
| CN205226152U (en) | Overrunning clutch of motorcycle | |
| JPS6010181B2 (en) | distribution type fuel injection pump |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP02 | Change in the address of a patent holder |
Address after: 400037 Chongqing city Beibei District caijiagang Zhen Tong Xing Industrial Park Fengqi Road No. 16 Patentee after: Lifan Industry (Group) Co.,Ltd. Address before: 400037 Chongqing city Shapingba District No. 60 Zhangjiawan Bridge Patentee before: Lifan Industry (Group) Co.,Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140813 Termination date: 20220216 |