CN103016086A - Directional roller tappet of valve gear of side-mounted camshaft engine - Google Patents
Directional roller tappet of valve gear of side-mounted camshaft engine Download PDFInfo
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- CN103016086A CN103016086A CN2012105679471A CN201210567947A CN103016086A CN 103016086 A CN103016086 A CN 103016086A CN 2012105679471 A CN2012105679471 A CN 2012105679471A CN 201210567947 A CN201210567947 A CN 201210567947A CN 103016086 A CN103016086 A CN 103016086A
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- tappet
- roller
- orienting
- chute
- roller tappet
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Abstract
In order to solve the problem that the situation that the roller tappet can not carry out rolling friction on a cam contact surface can not be ensured at any time in the prior art, the invention provides a directional roller tappet of a valve gear of a side-mounted camshaft engine. The directional roller tappet comprises a tappet, a positioning sleeve and a positioning pin, wherein the positioning sleeve is fixedly arranged in a tappet hole of a cylinder body and sleeved at the upper section of the tappet, and a slide groove is axially arranged in the positioning sleeve; and the positioning pin is fixedly arranged at the upper section of the tappet and arranged in the slide groove, and the central line of the slide groove is overlapped with the axis of the positioning pin. The roller tappet has the beneficial effects that the situation that the axis of the roller tappet can be parallel to the axis of a cam when an engine runs, and the roller tappet can carry out rolling friction on the cam contact surface can be ensured at any time. The roller tappet has the advantages of simple structure, simple and reliable assembly and maintenance and strong practicality.
Description
Technical field
The present invention relates to a kind of energy conservation of OHV motor, specially refer to the directed roller tappet of a kind of OHV engine valve actuating mechanism.
Background technique
Along with national legislation to improving constantly that the Fuel consumption limit value requires, the fuel consume that reduces motor the machine has become a vital task of Engine Industry.The fuel consume that reduces motor the machine can improve from a plurality of fermentation, and wherein, the friction consumption that reduces engine running mechanism also is its important ring.The friction of engine running mechanism consumes and mainly comprises: the friction of piston and ring member and casing wall, the spin friction of connecting rod and distribution device operation friction, with the difference of engine structure, total accounting for the ratio of the friction consumption of motor, above-mentioned several friction consumption differs larger.For OHV motor (as: the 491/4Y Engine Series that market maintenance is larger), its distribution device operation friction accounts for the ratio higher (during the slow-speed of revolution, can account for 15～20%) that the total friction of motor consumes.Obviously, the friction consumption that reduces distribution device can obviously reduce the total friction consumption of motor, thereby effectively reduces the fuel consume of motor the machine.
Usually, the distribution device of OHV motor adopts tappet to add the driving mode of rocking arm more, its valve actuation flow process is: in the ascent stage of cam profile, cam is up with its axle rotation and drive tappet, tappet promotes an end of valve rocker by push rod, it is rotated around pitman arm shaft, and the other end of rocking arm promotes valve opening; In the descending branch of cam profile, valve is progressively closed under the effect of valve spring, and valve promotes an end of valve rocker, and it is rotated around pitman arm shaft, and the other end of rocking arm promotes push rod and tappet, makes it descending with cam.The tappet of prior art OHV motor is generally plane tappet and roller tappet, and the surface of contact of plane tappet and cam is the plane, is sliding friction between tappet and the cam, and its friction factor is larger, and friction consumes serious; Roller tappet and cam contact surface are the cylndrical surface, are rolling friction between tappet and the cam, and friction consumes lower.Yet, when engine running, must guarantee at any time that the axis of tappet roller is parallel with camshaft line, the tappet roller could be realized rolling friction under the driving of cam, lower friction consumption just may be arranged, otherwise friction consumes can be increased on the contrary.But owing to reasons such as engine luggine and actuated by cams force unbalances, the tappet roller can not keep the axis of self parallel with camshaft line when engine running at any time, thereby can not guarantee at any time that the tappet roller realizes rolling friction at cam contact surface.Obviously, prior art OHV engine valve actuating mechanism roller tappet exists and can not guarantee at any time that the tappet roller is in the problem of cam contact surface realization rolling friction.
Summary of the invention
Realize the problem of rolling friction at cam contact surface for the tappet roller that can not guarantee at any time that solves the existence of prior art OHV engine valve actuating mechanism roller tappet, the present invention proposes the directed roller tappet of a kind of OHV engine valve actuating mechanism.The directed roller tappet of OHV engine valve actuating mechanism of the present invention comprises tappet, orienting cover and orienting pin, and orienting cover is fixed in the cylinder block tappet hole and is sleeved on the epimere of tappet, and axially is provided with chute at it; Orienting pin is fixed on the epimere of tappet and is placed in the chute; The center line of chute and the axis of orienting pin are overlapping.
Further, the orientation of the orienting cover chute of the directed roller tappet of OHV engine valve actuating mechanism of the present invention must guarantee that the orientation of chute can make the axis of tappet roller parallel with camshaft line to guarantee be as the criterion parallel with camshaft line of axis of tappet roller during i.e. orienting cover fixed installation.
Further, the orienting cover of the directed roller tappet of OHV engine valve actuating mechanism of the present invention press-fits by interference fit and is fixed in the cylinder block tappet hole.
Further, the orienting pin of the directed roller tappet of OHV engine valve actuating mechanism of the present invention press-fits the epimere that is fixed on tappet by interference fit, perhaps be processed into one with tappet.
Further, the orienting pin diameter of the directed roller tappet of OHV engine valve actuating mechanism of the present invention and the width of orienting cover chute are complementary, and namely orienting pin can only axial motion in chute, and can not rotate.
The useful technique effect of the directed roller tappet of OHV engine valve actuating mechanism of the present invention is can be parallel with camshaft line during at engine running after the axis that guarantees at any time the tappet roller, and assurance tappet roller is realized rolling friction at any time on cam contact surface.And, simple in structure, assemble, safeguard simple and reliable, practical.
Description of drawings
Accompanying drawing 1 is the directed roller tappet of the present invention embodiment's assembly structure schematic diagram;
Accompanying drawing 2 is tappet and orienting cover and orienting pin structural representations of the directed roller tappet of the present invention embodiment;
Accompanying drawing 3 is the A-A cross-sectional schematic in the accompanying drawing 2;
Accompanying drawing 4 is the local enlarged diagrams of the I in the accompanying drawing 3.
Below in conjunction with the drawings and specific embodiments the directed roller tappet of OHV engine valve actuating mechanism of the present invention is further described.
Embodiment
Accompanying drawing 1 is the directed roller tappet of the present invention embodiment's assembly structure schematic diagram, accompanying drawing 2 is roller tappet and orienting cover and orienting pin structural representations of the directed roller tappet of the present invention embodiment, and accompanying drawing 3 is the A-A cross-sectional schematic in the accompanying drawing 2, and accompanying drawing 4 is the local enlarged diagrams of the I in the accompanying drawing 3, among the figure, 1 is tappet, and 2 is roller, and 3 is orienting cover, 3A is chute, 4 is orienting pin, and 5 is camshaft, and 6 is cylinder block.As seen from the figure, the directed roller tappet of OHV engine valve actuating mechanism of the present invention comprises tappet 1, orienting cover 3 and orienting pin 4, and orienting cover 3 is fixed in the cylinder block tappet hole and is sleeved on the epimere of tappet 1, and axially is provided with chute 3A at it; Orienting pin 4 is fixed on the epimere of tappet 1 and is placed in the chute 3A; The axis of the center line of chute 3A and orienting pin 4 is overlapping.Obviously, the orientation of orienting cover chute has determined the axes orientation of tappet roller, therefore, the orientation of the orienting cover chute of the directed roller tappet of OHV engine valve actuating mechanism of the present invention must guarantee that the orientation of chute can make the axis of tappet roller parallel with camshaft line to guarantee be as the criterion parallel with camshaft line of axis of tappet roller during i.e. orienting cover fixed installation.Be convenient processing and install, the orienting cover of the directed roller tappet of OHV engine valve actuating mechanism of the present invention press-fits by interference fit and is fixed in the cylinder block tappet hole.Equally, the orienting pin of the directed roller tappet of OHV engine valve actuating mechanism of the present invention can press-fit the epimere that is fixed on tappet by interference fit, perhaps is processed into one with tappet.For guaranteeing directed accuracy and reliability, the orienting pin diameter of the directed roller tappet of OHV engine valve actuating mechanism of the present invention and the width of orienting cover chute are complementary, and namely orienting pin can only axial motion in chute, and can not rotate.
When engine running, the orienting pin of tappet epimere is placed in the orienting cover chute, because the orienting pin diameter of the directed roller tappet of OHV engine valve actuating mechanism of the present invention and the width of orienting cover chute are complementary, be that orienting pin can only axial motion in chute, and can not rotate.Therefore, the roller tappet can move up and down along the orienting cover axis, and can not rotate around orienting cover 3 axis.Again because the orientation of the orienting cover chute of the directed roller tappet of OHV engine valve actuating mechanism of the present invention to guarantee be as the criterion parallel with camshaft line of axis of tappet roller, i.e. must guarantee that the orientation of chute can make the axis of tappet roller parallel with camshaft line during orienting cover fixed installation.Therefore, when the roller tappet can move up and down along the orienting cover axis, remain that the axis of tappet roller is parallel with camshaft line, thereby assurance tappet roller is realized rolling friction at any time on cam contact surface.
Obviously, the useful technique effect of the directed roller tappet of OHV engine valve actuating mechanism of the present invention is can be parallel with camshaft line during at engine running after the axis that guarantees at any time the roller tappet, and assurance roller tappet is realized rolling friction at any time on cam contact surface.And, simple in structure, assemble, safeguard simple and reliable, practical.
Claims (5)
1. the directed roller tappet of an OHV engine valve actuating mechanism, it is characterized in that: this orientation roller tappet comprises tappet, orienting cover and orienting pin, orienting cover is fixed in the cylinder block tappet hole and is sleeved on the epimere of tappet, and axially is provided with chute at it; Orienting pin is fixed on the epimere of tappet and is placed in the chute; The center line of chute and the axis of orienting pin are overlapping.
2. the directed roller tappet of described OHV engine valve actuating mechanism according to claim 1, it is characterized in that: the orientation of orienting cover chute must guarantee that the orientation of chute can make the axis of tappet roller parallel with camshaft line to guarantee be as the criterion parallel with camshaft line of axis of tappet roller during i.e. orienting cover fixed installation.
3. the directed roller tappet of described OHV engine valve actuating mechanism according to claim 1 is characterized in that: orienting cover press-fits by interference fit and is fixed in the cylinder block tappet hole.
4. the directed roller tappet of described OHV engine valve actuating mechanism according to claim 1, it is characterized in that: orienting pin press-fits the epimere that is fixed on tappet by interference fit, perhaps be processed into one with tappet.
5. the directed roller tappet of described OHV engine valve actuating mechanism according to claim 1, it is characterized in that: the width of orienting pin diameter and orienting cover chute is complementary, and namely orienting pin can only axial motion in chute, and can not rotate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105679471A CN103016086A (en) | 2012-12-24 | 2012-12-24 | Directional roller tappet of valve gear of side-mounted camshaft engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105679471A CN103016086A (en) | 2012-12-24 | 2012-12-24 | Directional roller tappet of valve gear of side-mounted camshaft engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103016086A true CN103016086A (en) | 2013-04-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012105679471A Pending CN103016086A (en) | 2012-12-24 | 2012-12-24 | Directional roller tappet of valve gear of side-mounted camshaft engine |
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| CN (1) | CN103016086A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108884730A (en) * | 2016-02-19 | 2018-11-23 | 伊顿智能动力有限公司 | Engine valve tappet with anti-rotational plug |
| CN105545399B (en) * | 2015-12-01 | 2019-01-01 | 石河子大学 | Engine valve actuating mechanism ball tappet |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4094279A (en) * | 1976-05-07 | 1978-06-13 | Johnson Products Div. Of Sealed Power Corporation | Ductile iron roller tappet body and method for making same |
| US4361120A (en) * | 1980-05-02 | 1982-11-30 | Sealed Power Corporation | Roller tappet and method of making same |
| CN101305164A (en) * | 2005-11-10 | 2008-11-12 | 谢夫勒两合公司 | Valve gear of an internal combustion engine |
| CN201635784U (en) * | 2009-12-30 | 2010-11-17 | 绵阳新晨动力机械有限公司 | Orientating tappet of engine |
| CN101952559A (en) * | 2008-02-19 | 2011-01-19 | Ntn株式会社 | Roller follower, valve gear, apparatus for high-frequency hardening, method of heat-treating shaft member, process for producing shaft, and shaft |
| CN202991160U (en) * | 2012-12-24 | 2013-06-12 | 绵阳新晨动力机械有限公司 | Laterally-arranged camshaft engine valve mechanism orientational roller tappet |
-
2012
- 2012-12-24 CN CN2012105679471A patent/CN103016086A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4094279A (en) * | 1976-05-07 | 1978-06-13 | Johnson Products Div. Of Sealed Power Corporation | Ductile iron roller tappet body and method for making same |
| US4361120A (en) * | 1980-05-02 | 1982-11-30 | Sealed Power Corporation | Roller tappet and method of making same |
| CN101305164A (en) * | 2005-11-10 | 2008-11-12 | 谢夫勒两合公司 | Valve gear of an internal combustion engine |
| CN101952559A (en) * | 2008-02-19 | 2011-01-19 | Ntn株式会社 | Roller follower, valve gear, apparatus for high-frequency hardening, method of heat-treating shaft member, process for producing shaft, and shaft |
| CN201635784U (en) * | 2009-12-30 | 2010-11-17 | 绵阳新晨动力机械有限公司 | Orientating tappet of engine |
| CN202991160U (en) * | 2012-12-24 | 2013-06-12 | 绵阳新晨动力机械有限公司 | Laterally-arranged camshaft engine valve mechanism orientational roller tappet |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105545399B (en) * | 2015-12-01 | 2019-01-01 | 石河子大学 | Engine valve actuating mechanism ball tappet |
| CN108884730A (en) * | 2016-02-19 | 2018-11-23 | 伊顿智能动力有限公司 | Engine valve tappet with anti-rotational plug |
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Application publication date: 20130403 |