CN201246202Y - Engine cam decompression mechanism - Google Patents
Engine cam decompression mechanism Download PDFInfo
- Publication number
- CN201246202Y CN201246202Y CNU2008201855257U CN200820185525U CN201246202Y CN 201246202 Y CN201246202 Y CN 201246202Y CN U2008201855257 U CNU2008201855257 U CN U2008201855257U CN 200820185525 U CN200820185525 U CN 200820185525U CN 201246202 Y CN201246202 Y CN 201246202Y
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- CN
- China
- Prior art keywords
- camshaft
- flange
- decompression
- cam
- weight
- 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 - Lifetime
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Abstract
The utility model discloses a decompressing mechanism for the cam of an engine, which comprises a camshaft, a decompressing block is in pin connection on the centre line of the camshaft, a flange is arranged on one side of the pin joint part on the decompressing block, the distance from the outer end of the flange to the centre line of the camshaft is greater than the radius of a cam base circle, a heavy hammer is mounted on the other side of the pin joint part on the decompressing block, when the camshaft stops or rotates at a lower rotating speed, the flange can tightly keep close to an exhaust cam under the gravity action of the heavy hammer, the rocker arm is propped up and the exhaust valve is opened, thereby serving the function of decompression; when the camshaft rotates at a higher rotating speed, the heavy hammer drives the flange to get away from the exhaust cam under the action of the centrifugal force; and the utility model has the advantages of simple structure, and small occupied space, is suitable for a spindle-type engine, and can effectively reduce the volume of the spindle-type engine.
Description
Technical field
The utility model relates to a kind of engine cam mechanism of decompressor.
Background technique
When engine start, need the gas that suck be compressed, when the compression terminal point near, if do not reduce pressure, will make very difficulty of startup, when normal working of engine, then require the function of the mechanism of decompressor to disappear automatically.
The mechanism of decompressor is set in motor, can suitably reduces internal pressure of combustion chamber, thus the starting resistance when alleviating engine start.Usually, the mechanism of decompressor is arranged on the camshaft, the engine cam mechanism of decompressor commonly used by decompression get rid of piece, decompression is got rid of piece axle, decompression torsion spring and decompression ejector pin and is constituted, complex structure, it is big to take up room.
Summary of the invention
The utility model purpose is: in order to overcome in the prior art, complex structure, the big shortcoming that takes up room provide a kind of engine cam mechanism of decompressor, this mechanism structure is simple, it is little to take up room, and is fit to the vertical shaft type motor, can effectively reduce vertical shaft type motor volume.
The technical solution of the utility model is: a kind of engine cam mechanism of decompressor, comprise camshaft, be connected with the decompression piece on the center line of described camshaft, the decompression piece is provided with flange in a side of its pin joint portion, the distance of camshaft center line is arrived greater than radius of cam base-circle in the outer end of flange, the decompression piece is provided with weight at the opposite side of its pin joint portion, when camshaft stops or when rotating than the slow-speed of revolution, weight makes flange be close to exhaust cam under action of gravity, the jack-up rocking arm, open exhaust valve, play decompression, when camshaft rotates with higher rotation speed, under centrifugal action, weight drives flange away from exhaust cam, and the mechanism of decompressor is not worked;
Described flange and weight are shaped on the decompression piece.
The utility model advantage is: the utility model is simple in structure, and it is little to take up room, and is fit to very much the vertical shaft type motor, can effectively reduce vertical shaft type motor volume.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further described:
Fig. 1 is the utility model structural representation;
Fig. 2 is the schematic representation of decompression piece in the utility model;
Fig. 3 stops for camshaft or the working state figure when slowly running;
Fig. 4 is the working state figure of camshaft when rotating with higher speed.
Wherein: 10 camshafts, 11 exhaust cams, 12 rocking arms;
20 decompression pieces, 21 flanges, 22 weights.
Embodiment
Embodiment: as depicted in figs. 1 and 2, a kind of engine cam mechanism of decompressor, comprise camshaft 10, be connected with decompression piece 20 on the center line of described camshaft 10, decompression piece 20 has extended to form flange 21 in a side of its pin joint portion, the distance of camshaft 10 center lines is arrived greater than radius of cam base-circle in the outer end of flange 21, and decompression piece 20 is formed with weight 22 at the opposite side of its pin joint portion.
As shown in Figure 3, when camshaft 10 stops or when rotating than the slow-speed of revolution (when motor stops or starting), weight 22 makes flange 21 be close to exhaust cam 11 under action of gravity, jack-up rocking arm 12 is opened exhaust valve, plays decompression.
As shown in Figure 4, when camshaft 10 rotates with higher rotation speed (during the motor proper functioning), under centrifugal action, weight 22 drives flange 21 away from exhaust cam 11, and the mechanism of decompressor is not worked.
The utility model is simple in structure, and it is little to take up room, and is fit to very much the vertical shaft type motor, can effectively reduce vertical shaft type motor volume.
Claims (2)
1. engine cam mechanism of decompressor, comprise camshaft (10), it is characterized in that: be connected with decompression piece (20) on the center line of described camshaft (10), decompression piece (20) is provided with flange (21) in a side of its pin joint portion, the distance of camshaft (10) center line is arrived greater than radius of cam base-circle in the outer end of flange (21), decompression piece (20) is provided with weight (22) at the opposite side of its pin joint portion, when camshaft (10) stops or when rotating than the slow-speed of revolution, weight (22) makes flange (21) be close to exhaust cam (11) under action of gravity, jack-up rocking arm (12), open exhaust valve, play decompression, when camshaft (10) rotated with higher rotation speed, under centrifugal action, weight (22) drove flange (21) away from exhaust cam (11).
2. according to the described engine cam mechanism of decompressor of claim 1, it is characterized in that: described flange (21) and weight (22) are shaped on the decompression piece (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201855257U CN201246202Y (en) | 2008-09-08 | 2008-09-08 | Engine cam decompression mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201855257U CN201246202Y (en) | 2008-09-08 | 2008-09-08 | Engine cam decompression mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201246202Y true CN201246202Y (en) | 2009-05-27 |
Family
ID=40730022
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201855257U Expired - Lifetime CN201246202Y (en) | 2008-09-08 | 2008-09-08 | Engine cam decompression mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201246202Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102080583A (en) * | 2010-12-27 | 2011-06-01 | 洛阳北方企业集团有限公司 | Engine exhaust device |
| CN114278408A (en) * | 2022-01-05 | 2022-04-05 | 浙江钱江摩托股份有限公司 | Decompression structure of engine camshaft |
-
2008
- 2008-09-08 CN CNU2008201855257U patent/CN201246202Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102080583A (en) * | 2010-12-27 | 2011-06-01 | 洛阳北方企业集团有限公司 | Engine exhaust device |
| CN114278408A (en) * | 2022-01-05 | 2022-04-05 | 浙江钱江摩托股份有限公司 | Decompression structure of engine camshaft |
| CN114278408B (en) * | 2022-01-05 | 2024-04-26 | 浙江钱江摩托股份有限公司 | Decompression structure of engine camshaft |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: SUZHOU PARSUM POWER MACHINE CO., LTD. Free format text: FORMER NAME: SUZHOU BAISHENG MOTILITY MACHINERY CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: Xushuguan Development Zone in Suzhou City, Jiangsu province 215011 Hong Kong Road No. 567 Yum Suzhou power machinery Limited by Share Ltd Patentee after: Suzhou Bai Sheng power machine Company Limited by Shares Address before: Suzhou District of Jiangsu province 215011 City Jinfeng Road, No. 18 Patentee before: Suzhou Baisheng Power Machine Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090527 |