CN204552856U - A kind of combined type selflubricating titanium alloy camshaft - Google Patents
A kind of combined type selflubricating titanium alloy camshaft Download PDFInfo
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- CN204552856U CN204552856U CN201520142280.XU CN201520142280U CN204552856U CN 204552856 U CN204552856 U CN 204552856U CN 201520142280 U CN201520142280 U CN 201520142280U CN 204552856 U CN204552856 U CN 204552856U
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Abstract
The utility model discloses a kind of combined type selflubricating titanium alloy camshaft, comprise axis body and cam, the outer wall of described axis body has axially through positioning groove A, the inwall of described cam is provided with equal with positioning groove A quantity, the positioning convex B of form fit, described axis body is quill shaft, described axis body and cam all adopt titanium alloy material to make, described cam is three peach-shaped tangential cam structures, described cam both side surface is provided with annular oil groove, O-ring seal is provided with outside described annular oil groove, described annular oil groove perimembranous is provided with three oil ducts, described axis body and cam outer peripheral surface all apply ruthenium iridium coating layer, Water-cooling circulating passage is provided with in the middle part of described axis body.The utility model adds wear resistance and corrosion resistance, long service life, high-temperature stability and good heat resistance, effectively can increase the fuel delivery per cycle of oil pump, achieve the self-lubricating capacities of cam, cause camshaft inordinate wear when avoiding oil leab to block.
Description
Technical field
The utility model relates to a kind of camshaft, specifically a kind of combined type selflubricating titanium alloy camshaft.
Background technique
Camshaft is as the core component of motor, and its performance directly affects the overall performance of vehicle, and that pursues motor car engine performance along with people improves constantly, and it is also proposed higher requirement to camshaft.Engine cam the earliest, by casting or forging realization, whole camshaft adopts commaterial, by creating after heat treatment, machining, complex process, weight are large, cost of production is high, and the design of component is dumb, can not meet the requirement of motor light-weight design.Afterwards, occurred assembled camshaft, axis body and cam design separately, and recombinant is installed together, and achieve lightweight, reduce process complexity.But, because cam is fitted on axis body by interference fit, make assembled camshaft anti-twisting property poor, larger moment of torsion cannot be born, use, in addition, for the cam that some structures are special, complex-shaped to meet the high special occasions of some torque demands, add mechanical processing difficulty, even likely cannot add manufacture by machine at all.Camshaft is the vitals in I. C engine distribution mechanism, it directly affects the carrying out of burning, therefore affect the performance of motor, the links such as fuel consumption and emission, prior art convexity wheel shaft mostly adopts steel to process, easy to wear, corrosion-resistant, finally makes engines distribution abnormal, and engine power declines, therefore, be necessary to improve.
Camshaft is positioned at the end of engine lubrication system, and therefore lubrication state allows of no optimist.If oil pump is because service time is long etc., reason occurs that charge oil pressure is not enough, or oil leab blocking causes lubricant oil to arrive camshaft, or the excessive lubricant oil that causes of bearing cap clamping bolt screw-down torque cannot enter camshaft gap, also can cause the inordinate wear of camshaft.
Model utility content
The purpose of this utility model is to provide a kind of combined type selflubricating titanium alloy camshaft, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the utility model provides following technological scheme:
A kind of combined type selflubricating titanium alloy camshaft, comprise axis body and cam, the outer wall of described axis body has axially through positioning groove A, the inwall of described cam is provided with equal with positioning groove A quantity, the positioning convex B of form fit, described positioning groove A is set to four, circumferentially be distributed on the outer wall of axis body, described positioning convex B is also set to four, circumferentially be distributed on the inwall of cam, described positioning convex B is stuck in positioning groove A, described axis body is quill shaft, described axis body and cam all adopt titanium alloy material to make, described cam is three peach-shaped tangential cam structures, described cam both side surface is provided with annular oil groove, O-ring seal is provided with outside described annular oil groove, described annular oil groove perimembranous is provided with three oil ducts, three described oil ducts are huge to be distributed on three peach-shaped tangential cams, described O-ring seal perimembranous is provided with oilhole makes annular oil groove be connected with oil duct, described axis body and cam outer peripheral surface all apply ruthenium iridium coating layer, Water-cooling circulating passage is provided with in the middle part of described axis body.
As further program of the utility model: the cross section of described positioning groove A is triangle, the cross section of described positioning convex B is also triangle, and leg-of-mutton tip and root rounding.
As the utility model further scheme: the thickness of described ruthenium iridium coating layer is 1.5mm.
As the utility model further scheme: the overall molded line of three peach-shaped tangential cam structures of described cam is connected to form successively by three sections of the same molded line, each segment type line is connected to form successively by 5 sections of lines, and the formula of 5 sections of lines is respectively: first paragraph (1 1: 2 sections, figure mid point): h=(R+r)/cos (x) (R+r);
Second segment (2 1: 3 sections, figure mid point): h=e2*cos (x1)+sqrt ((p2+r) ^2-(e2*sin (x1)) ^2) one (R+r);
3rd section (3 1: 4 sections, figure mid point): h=e3*cos (x2)+sqrt ((p3+r) ^2-(e3*sin (x2)) ^2) one (R+r);
4th section (4 1: 5 sections, figure mid point): h=e3*cos (x3)+sqrt ((p3+r) ^2-(e3*sin (x3)) ^2) one (R+r);
Wherein: the corner of R is Base radius, r is radius of roller, h is lift, p2 is second segment radius of arc, to be the 3rd section and the four arcs center of circle to basic circle distance of center circle from, e3 to the distance in the basic circle center of circle, the x corner that is first paragraph lines, the x1 corner that is second segment lines, the x2 corner that is the 3rd section of lines, the x3 corner that is the 4th section of lines, x4 be in p3 to be the 3rd section and four arcs radius, e2 the be second segment circular arc center of circle the 5th section of lines.
Compared with prior art, the beneficial effects of the utility model are: axis body and cam made by titanium alloy material and cam outer peripheral surface all applies ruthenium iridium coating layer, not only alleviate the weight of camshaft, add wear resistance and the corrosion resistance of camshaft simultaneously, camshaft long service life, high-temperature stability and good heat resistance, effectively can increase the fuel delivery per cycle of oil pump, by repeatedly fuel feeding, the rail internal pressure fluctuation of high pressure common rail fuel injection system can be reduced, pre-lubricant oil before this in oil groove is utilized progressively to be discharged by oil duct in the process of rotating, achieve the self-lubricating capacities of cam, camshaft inordinate wear is caused when avoiding oil leab to block.
Accompanying drawing explanation
Fig. 1 is the structural representation of combined type selflubricating titanium alloy camshaft.
Fig. 2 is combined type selflubricating titanium alloy camshaft cam and cam profile schematic diagram.
Fig. 3 is the structural representation of combined type selflubricating titanium alloy camshaft central axis.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technological scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Refer to Fig. 1 ~ 3, in the utility model embodiment, a kind of combined type selflubricating titanium alloy camshaft, comprise axis body 1 and cam 2, the outer wall of described axis body 1 has axially through positioning groove A, the inwall of described cam 2 is provided with equal with positioning groove A quantity, the positioning convex B of form fit, described positioning groove A is set to four, circumferentially be distributed on the outer wall of axis body 1, described positioning convex B is also set to four, circumferentially be distributed on the inwall of cam 2, described positioning convex B is stuck in positioning groove A, the cross section of described positioning groove A is triangle, the cross section of described positioning convex B is also triangle, and leg-of-mutton tip and root rounding, described axis body 1 is quill shaft, described axis body 1 and cam 2 all adopt titanium alloy material to make, under guarantee torsional strenght reliability meets the prerequisite of usage requirement, adopt quill shaft that the total quality of camshaft can be made obviously to alleviate, meet complete machine lightweight demand, significant to engine energy-saving, the cost of material of quill shaft is lower simultaneously, described cam 2 is three peach-shaped tangential cam structures, described cam 2 both side surface is provided with annular oil groove 7, O-ring seal 5 is provided with outside described annular oil groove 7, described annular oil groove 7 perimembranous is provided with three oil ducts 6, three described oil ducts 6 are huge to be distributed on three peach-shaped tangential cams 2, described O-ring seal 5 perimembranous is provided with oilhole 4 makes annular oil groove 7 be connected with oil duct 6, described axis body 1 and cam 2 outer peripheral surface all apply ruthenium iridium coating layer, and the thickness of ruthenium iridium coating layer is 1.5mm, coating ruthenium iridium coating layer can improve titanium alloy camshaft high-temperature stability in use and heat resistance greatly, Water-cooling circulating passage is provided with in the middle part of described axis body 2, to realize water-cooled, reduce the temperature of axis body, improve the working life of axis body, the overall molded line of three peach-shaped tangential cam structures of described cam 2 is connected to form successively by three sections of the same molded line, each segment type line is connected to form successively by 5 sections of lines, the formula of 5 sections of lines is respectively:
First paragraph (1 1: 2 sections, figure mid point): h=(R+r)/cos (x) (R+r);
Second segment (2 1: 3 sections, figure mid point): h=e2*cos (x1)+sqrt ((p2+r) ^2-(e2*sin (x1)) ^2) one (R+r);
3rd section (3 1: 4 sections, figure mid point): h=e3*cos (x2)+sqrt ((p3+r) ^2-(e3*sin (x2)) ^2) one (R+r);
4th section (4 1: 5 sections, figure mid point): h=e3*cos (x3)+sqrt ((p3+r) ^2-(e3*sin (x3)) ^2) one (R+r);
5th section (5 1: 6 sections, figure mid point): h=(R+r)/cos (x4) (R+r);
Wherein: the corner of R is Base radius, r is radius of roller, h is lift, p2 is second segment radius of arc, to be the 3rd section and the four arcs center of circle to basic circle distance of center circle from, e3 to the distance in the basic circle center of circle, the x corner that is first paragraph lines, the x1 corner that is second segment lines, the x2 corner that is the 3rd section of lines, the x3 corner that is the 4th section of lines, x4 be in p3 to be the 3rd section and four arcs radius, e2 the be second segment circular arc center of circle the 5th section of lines.
The utility model axis body 1 and cam 2 are titanium alloy material and make, not only alleviate the weight of camshaft, improve wear resistance and the corrosion resistance of camshaft simultaneously, camshaft long service life, axis body 1 and cam 2 outer peripheral surface all apply ruthenium iridium coating layer, coating ruthenium iridium coating layer can improve titanium alloy camshaft high-temperature stability in use and heat resistance greatly, a cam 2 moves one week along molded line, three Fuel injection system can be realized, by cooperatively interacting of every section of tangent line form, effectively can reduce the generation of noise, each cam 2 staggers 60 ° and is arranged on axis body 1, when cam axle, alternately fuel feeding, during engine operation, cam 2 is under the effect rotated, pre-lubricant oil before this in oil groove is utilized progressively to be discharged by oil duct in the process of rotating, achieve the self-lubricating capacities of cam.
To those skilled in the art, obvious the utility model is not limited to the details of above-mentioned one exemplary embodiment, and when not deviating from spirit of the present utility model or essential characteristic, can realize the utility model in other specific forms.Therefore, no matter from which point, all should embodiment be regarded as exemplary, and be nonrestrictive, scope of the present utility model is limited by claims instead of above-mentioned explanation, and all changes be therefore intended in the implication of the equivalency by dropping on claim and scope are included in the utility model.Any reference character in claim should be considered as the claim involved by limiting.
In addition, be to be understood that, although this specification is described according to mode of execution, but not each mode of execution only comprises an independently technological scheme, this narrating mode of specification is only for clarity sake, those skilled in the art should by specification integrally, and the technological scheme in each embodiment also through appropriately combined, can form other mode of executions that it will be appreciated by those skilled in the art that.
Claims (4)
1. a combined type selflubricating titanium alloy camshaft, comprise axis body (1) and cam (2), it is characterized in that, the outer wall of described axis body (1) has axially through positioning groove A, the inwall of described cam (2) is provided with equal with positioning groove A quantity, the positioning convex B of form fit, described positioning groove A is set to four, circumferentially be distributed on the outer wall of axis body (1), described positioning convex B is also set to four, circumferentially be distributed on the inwall of cam (2), described positioning convex B is stuck in positioning groove A, described axis body (1) is quill shaft, described axis body (1) and cam (2) all adopt titanium alloy material to make, described cam (2) is three peach-shaped tangential cam structures, described cam (2) both side surface is provided with annular oil groove (7), described annular oil groove (7) outside is provided with O-ring seal (5), described annular oil groove (7) perimembranous is provided with three oil ducts (6), three described oil ducts (6) are all distributed on three peach-shaped tangential cams (2), described O-ring seal (5) perimembranous is provided with oilhole (4) makes annular oil groove (7) be connected with oil duct (6), described axis body (1) and cam (2) outer peripheral surface all apply ruthenium iridium coating layer, described axis body (1) middle part is provided with Water-cooling circulating passage.
2. combined type selflubricating titanium alloy camshaft according to claim 1, is characterized in that, the cross section of described positioning groove A is triangle, and the cross section of described positioning convex B is also triangle, and leg-of-mutton tip and root rounding.
3. combined type selflubricating titanium alloy camshaft according to claim 1, is characterized in that, the thickness of described ruthenium iridium coating layer is 1.5mm.
4. combined type selflubricating titanium alloy camshaft according to claim 1, it is characterized in that, the overall molded line of three peach-shaped tangential cam structures of described cam (2) is connected to form successively by three sections of the same molded line, each segment type line is connected to form successively by 5 sections of lines, and the formula of 5 sections of lines is respectively: first paragraph: h=(R+r)/cos (x) (R+r);
Second segment: h=e2*cos (x1)+sqrt ((p2+r) ^2-(e2*sin (x1)) ^2) one (R+r);
3rd section: h=e3*cos (x2)+sqrt ((p3+r) ^2-(e3*sin (x2)) ^2) one (R+r);
4th section: h=e3*cos (x3)+sqrt ((p3+r) ^2-(e3*sin (x3)) ^2) one (R+r);
Wherein: the corner of R is Base radius, r is radius of roller, h is lift, p2 is second segment radius of arc, to be the 3rd section and the four arcs center of circle to basic circle distance of center circle from, e3 to the distance in the basic circle center of circle, the x corner that is first paragraph lines, the x1 corner that is second segment lines, the x2 corner that is the 3rd section of lines, the x3 corner that is the 4th section of lines, x4 be in p3 to be the 3rd section and four arcs radius, e2 the be second segment circular arc center of circle the 5th section of lines.
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CN201520142280.XU CN204552856U (en) | 2015-03-13 | 2015-03-13 | A kind of combined type selflubricating titanium alloy camshaft |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108798814A (en) * | 2018-06-13 | 2018-11-13 | 中国北方发动机研究所(天津) | A kind of engine light titanium alloy composite material camshaft |
CN109642482A (en) * | 2016-07-04 | 2019-04-16 | 雷诺股份公司 | Back of cam is lubricated by oil recycling |
-
2015
- 2015-03-13 CN CN201520142280.XU patent/CN204552856U/en not_active Expired - Fee Related
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109642482A (en) * | 2016-07-04 | 2019-04-16 | 雷诺股份公司 | Back of cam is lubricated by oil recycling |
EP3478945B1 (en) * | 2016-07-04 | 2021-08-11 | Renault S.A.S. | Lubrication of backs of cams by oil recovery |
CN109642482B (en) * | 2016-07-04 | 2022-01-25 | 雷诺股份公司 | Lubrication of cam back by oil recovery |
CN108798814A (en) * | 2018-06-13 | 2018-11-13 | 中国北方发动机研究所(天津) | A kind of engine light titanium alloy composite material camshaft |
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