CN102102552A - Cam offset valve actuating mechanism - Google Patents
Cam offset valve actuating mechanism Download PDFInfo
- Publication number
- CN102102552A CN102102552A CN2011100741109A CN201110074110A CN102102552A CN 102102552 A CN102102552 A CN 102102552A CN 2011100741109 A CN2011100741109 A CN 2011100741109A CN 201110074110 A CN201110074110 A CN 201110074110A CN 102102552 A CN102102552 A CN 102102552A
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- cam
- offset
- valve
- rocker arm
- fixed
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- Valve-Gear Or Valve Arrangements (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
The invention discloses a cam offset valve actuating mechanism and belongs to the field of manufacturing of engines of motor vehicles. In the valve actuating mechanism, an offset cam is arranged on every two valves, and the valve actuating mechanism also comprises an axe-shaped rocker arm and an offset rocker arm; the cam is arranged above each valve on one side of the cam; the swinging end of the axe-shaped rocker arm is arranged between the cam and the valve on one side of the cam, and an adjustment end is fixed on a cylinder head; the offset rocker arm is fixed in the cylinder head through a rocker arm pin, the offset end of the offset rocker arm is connected with the cam, and the adjustment end is fixed on the other valve through a valve adjusting screw; and the offset end of the offset rocker arm is externally connected with the cam by arranging a roller. The cam offset valve actuating mechanism provided by the invention makes inner space more compact, so that larger accommodation space is created to ensure that a spark plug is arranged in the center of a combustion chamber, the mixed gas can be combusted fully and the dynamic performance and economic performance of the engine can be effectively improved.
Description
Technical field
The present invention relates to the distribution device of motor car engine, relate in particular to a kind of cam offset distribution device.
Background technique
Distribution device is the control mechanism of motor inlet and outlet, requirement according to the job order and the working procedure of cylinder, periodically open and close the inlet and outlet door, Valve Rocker Organization is the important accessory of motor, valve rocker utilizes lever to press the switching of valve, thus in motor input air and discharge waste gas after burning.As shown in Figure 1, existing motorcycle rocking arm 1 ' is in cam 2 ' and valve 3 ' top, and cam 2 ' and valve 3 ' realize that by rocking arm 1 ' rotational transform of camshaft is the to-and-fro motion of valve 3 ' in the both sides of rocking arm 1 ', but existing rocking arm 1 ' volume is bigger, has increased cost.Prior art is passed through rocker-arm roller pin 4 ' fixedly rocking arm 1 ' and rocking arm 1 ' generation frictional force, and especially in use for some time, the gap of contact position increases, and the wearing and tearing of aggravation contact position cause engine noise to increase, the frictional loss increase.In addition, because cam 2 ' is arranged on rocking arm 1 ' below, taken bigger inner space, respective offsets is had to carry out in the position of spark plug, if spark plug can place the center of firing chamber, can make mixture combustion more abundant, can effectively improve engine power performance and economic performance.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the invention provides a kind of compact structure, volume takies the cam offset distribution device little, that transmission performance is high.
Technological scheme: for achieving the above object, offset cam of per two valves configuration of distribution device of the present invention, this cam places the top of a side valve; Described distribution device also comprises axe type rocking arm and offset rocker arm, and the swinging end of axe type rocking arm is arranged between cam and the cam one side valve, adjusts end and is fixed on the cylinder head; Offset rocker arm is fixed in the cylinder head by rocker-arm roller pin, and the offset side and the cam of offset rocker arm join, and adjusts end and is fixed on another valve by valve adjuster.
The offset side of described offset rocker arm is by being provided with roller and cam is external, thereby significantly reduced the frictional force with cam.
The adjustment end of described axe type rocking arm is by adjusting screw on the sphere connection set, and the sphere connection set comprises spherical groove and spheroid, and spherical groove is fixed in cylinder head, and spheroid is connected with the adjustment screw.
Described axe type rocking arm is provided with near cam contact surface and thickens bar, thickening bar effectively increases area of contact on the one hand, also increases the intensity of rocking arm on the other hand, has reduced plastic deformation, the contact position of guaranteeing rocker head and cam is more accurate, thereby has guaranteed that valve timing is more accurate.
Beneficial effect: cam offset distribution device provided by the invention can be widely used on the motor of motorcycle and automobile, cam adopts the top set formula, correspondingly, offset rocker arm and axe type rocking arm make the inner space compact more again by being set, thereby having created bigger containing space makes spark plug place the center of firing chamber, make mixture combustion more abundant, effectively improve engine power performance and economic performance.Rocker structure of the present invention is simple, has further reduced frictional loss by roller is set, and improves transmission efficiency.
Description of drawings
Fig. 1 is the structural representation of prior art distribution device;
Fig. 2 is a structural representation of the present invention;
Fig. 3 is the structural representation of axe type rocking arm of the present invention.
Embodiment
Below in conjunction with accompanying drawing the present invention is done further explanation.
As Fig. 2, shown in Figure 3, this distribution device comprises two valves 1, offset cam 2, axe type rocking arm 3 and an offset rocker arm 4.Cam 2 places the top of a side valve, and the swinging end of axe type rocking arm 3 is arranged between cam 2 and the cam 2 one side valves, can swing up and down, and impels valve reciprocation; The adjustment end is fixed on the cylinder head, and specifically, adjusting end is to be fixed on the sphere connection set 9 by adjusting screw 8, and sphere connection set 9 comprises spherical groove 10 and spheroid 11, and spherical groove 10 is fixed in cylinder head, and spheroid 11 is connected with adjustment screw 8.As another embodiment of the present invention, described sphere connection set 9 can also adopt universal joint, optimum employing ball cage universal joint.
Offset rocker arm 4 is fixed in the cylinder head by rocker-arm roller pin 5, the offset side of offset rocker arm 4 and cam 2 are external, can significantly reduce and cam 2 between friction, adjusting end is fixed on another valve by valve adjuster 6, when cam 2 promotes offset rocker arm 4 on the basis of rocker-arm roller pin 5 during circle swing, the adjustment end of offset rocker arm 4 down moves, and makes valve reciprocation.
Also be provided with near cam 2 surface of contact at axe type rocking arm 3 and thicken bar, thickening bar can effectively increase area of contact on the one hand, also increases the intensity of axe type rocking arm 3 on the other hand, has reduced plastic deformation, can guarantee the contact position of axe type rocking arm 3 and cam 2, thereby guarantee that valve timing is more accurate.
As another embodiment of the present invention, the valve quantity of this gas distribution structure is 4, and wherein 2 is intake valve, and 2 is exhaust valve, and cam quantity is 2, corresponding one group of intake valve of each cam and exhaust valve.
The above only is a preferred implementation of the present invention; be noted that for those skilled in the art; under the prerequisite that does not break away from the principle of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (4)
1. cam offset distribution device is characterized in that: per two valves of described distribution device (a 1) configuration offset cam (2), and this cam (2) places the top of a side valve; Described distribution device also comprises axe type rocking arm (3) and offset rocker arm (4), and the swinging end of axe type rocking arm (3) is arranged between cam (2) and cam (2) the one side valves, adjusts end and is fixed on the cylinder head; Offset rocker arm (4) is fixed in the cylinder head by rocker-arm roller pin (5), and the offset side of offset rocker arm (4) and cam (2) join, and adjusts end and fixes (6) on another valve by valve adjuster.
2. offset gas distribution structure according to claim 1 is characterized in that: the offset side of described offset rocker arm (4) is external with cam (2) by roller (7) is set.
3. offset gas distribution structure according to claim 1, it is characterized in that: the adjustment end of described axe type rocking arm (3) is fixed on the sphere connection set (9) by adjusting screw (8), sphere connection set (9) comprises spherical groove (10) and spheroid (11), spherical groove (10) is fixed in cylinder head, and spheroid (11) is connected with adjustment screw (8).
4. offset gas distribution structure according to claim 1 is characterized in that: described axe type rocking arm (3) is provided with near cam (2) surface of contact and thickens bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100741109A CN102102552A (en) | 2011-03-28 | 2011-03-28 | Cam offset valve actuating mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100741109A CN102102552A (en) | 2011-03-28 | 2011-03-28 | Cam offset valve actuating mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102102552A true CN102102552A (en) | 2011-06-22 |
Family
ID=44155583
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100741109A Pending CN102102552A (en) | 2011-03-28 | 2011-03-28 | Cam offset valve actuating mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102102552A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103046977A (en) * | 2012-12-20 | 2013-04-17 | 中国兵器工业集团第七0研究所 | Special-shaped swing arm |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6412008A (en) * | 1987-07-01 | 1989-01-17 | Mazda Motor | Valve system for engine |
| US5060605A (en) * | 1989-06-26 | 1991-10-29 | Isuzu Motors Limited | Valve drive mechanism for vehicle engine |
| CN1180784A (en) * | 1996-09-02 | 1998-05-06 | 本田技研工业株式会社 | Valve operating system in internal combustion engine |
| CN1421595A (en) * | 2001-11-22 | 2003-06-04 | Ntn株式会社 | Cursor |
| CN201972748U (en) * | 2011-03-28 | 2011-09-14 | 南京金城机械有限公司 | Air distribution mechanism with offset cams |
-
2011
- 2011-03-28 CN CN2011100741109A patent/CN102102552A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6412008A (en) * | 1987-07-01 | 1989-01-17 | Mazda Motor | Valve system for engine |
| US5060605A (en) * | 1989-06-26 | 1991-10-29 | Isuzu Motors Limited | Valve drive mechanism for vehicle engine |
| CN1180784A (en) * | 1996-09-02 | 1998-05-06 | 本田技研工业株式会社 | Valve operating system in internal combustion engine |
| CN1421595A (en) * | 2001-11-22 | 2003-06-04 | Ntn株式会社 | Cursor |
| CN201972748U (en) * | 2011-03-28 | 2011-09-14 | 南京金城机械有限公司 | Air distribution mechanism with offset cams |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103046977A (en) * | 2012-12-20 | 2013-04-17 | 中国兵器工业集团第七0研究所 | Special-shaped swing arm |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110622 |