CN109139166A - A kind of automobile camshaft - Google Patents
A kind of automobile camshaft Download PDFInfo
- Publication number
- CN109139166A CN109139166A CN201810877228.7A CN201810877228A CN109139166A CN 109139166 A CN109139166 A CN 109139166A CN 201810877228 A CN201810877228 A CN 201810877228A CN 109139166 A CN109139166 A CN 109139166A
- Authority
- CN
- China
- Prior art keywords
- camshaft
- cam
- main body
- automobile
- camshaft main
- 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.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
- F01L1/047—Camshafts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/14—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass gear parts, e.g. gear wheels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P2700/00—Indexing scheme relating to the articles being treated, e.g. manufactured, repaired, assembled, connected or other operations covered in the subgroups
- B23P2700/02—Camshafts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
- F01L1/047—Camshafts
- F01L2001/0471—Assembled camshafts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
- F01L1/047—Camshafts
- F01L2001/0475—Hollow camshafts
Abstract
The invention discloses a kind of automobile camshafts, including camshaft main body, it is characterized by: the surface two sides of camshaft main body are fixedly connected to confinement block, position between confinement block is arranged with admission cam, the bottom end of admission cam is fixedly connected with exhaust cam, camshaft main body is internally provided with middle air hose, the two sides of camshaft main body and admission cam are symmetrically arranged with screw thread pin hole, the internal whorl of screw thread pin hole is connected with cam rivet, the surface of camshaft main body is provided with venthole, the right end face of camshaft main body is fixedly connected with transmission gear, the present invention relates to camshaft technical fields.The automobile camshaft, the dissipation for accelerating cam axle process heat is reached, heat concentration is avoided to cause cam wear consumption serious, improve camshaft service life and, avoid mandrel integrated with cam function, the torsional strength of mandrel and the wearability of cam are improved, while reducing part with the purpose of the economic attrition changed with changing convenient for components.
Description
Technical field
The present invention relates to camshaft technical field, specially a kind of automobile camshaft.
Background technique
Camshaft is a component in piston engine.Its effect is to control the unlatching and closed action of valve.Though
So in four-stroke engine the revolving speed of camshaft be crankshaft half (in the two stroke engine revolving speed and crankshaft of camshaft
It is identical), but usually it revolving speed it is still very high, and need to bear very big torque, thus in designing to camshaft strong
The requirement of degree and support aspect is very high, and material is usually superior alloy steel or steel alloy.Since valve motion rule is related to
The power and service performance of one engine, thus camshaft design in the design process of engine in occupation of highly important
Status.
Camshaft bearing is by periodic shock loading.Contact stress between cam and tappet is very big, relative sliding velocity
Also very high, therefore the abrasion on cam work surface is than more serious.In response to this, camshaft journal and cam work surface are removed
Outside due higher dimensional accuracy, lesser surface roughness and enough rigidity, should also there be higher wearability and good
Good lubrication.Camshaft is usually forged by quality carbon steel or steel alloy, it is also possible to alloy cast iron or spheroidal graphite cast-iron casting.Axle journal and
It after heat treatment polishes on cam work surface.
The main body of camshaft is a cylindrical barred body approximately uniform with air cylinder group length.It is convex that it is cased with several above
Wheel, for driving valve.Camshaft is supported in cam shaft bearing bore by camshaft journal, therefore camshaft journal number
How much purpose is an important factor for influencing camshaft support rigidity.If camshaft insufficient rigidity, when work, will bend change
Shape influences valve timing.
The axle center of camshaft and cam are set as the structure of integral type at present, and axle center is different from the effect of cam, so needing
The structural behaviour wanted is different, and the camshaft of integral type is unfavorable for the performance of each structure member function, and cam is at work, rubs
It wipes and generates a large amount of thermal energy, it is prolonged to work, the serious wear of cam face is caused, to influence the working performance of cam.
Summary of the invention
(1) the technical issues of solving
In view of the deficiencies of the prior art, the present invention provides a kind of automobile camshafts, solve the axle center of current camshaft
The structure of integral type is set as with cam, axle center is different from the effect of cam, so the structural behaviour needed is different, integral type
Camshaft is unfavorable for the performance of each structure member function, and cam is at work, and friction generates a large amount of thermal energy, for a long time
Work, causes the serious wear of cam face, thus the problem of influencing the working performance of cam.
(2) technical solution
In order to achieve the above object, the present invention is achieved by the following technical programs: a kind of automobile camshaft, including cam
Shaft body, it is characterised in that: the surface two sides of the camshaft main body are fixedly connected to confinement block, between the confinement block
Position is arranged with admission cam, and the bottom end of the admission cam is fixedly connected with exhaust cam, the inside of the camshaft main body
It is provided with middle air hose, the two sides of the camshaft main body and admission cam are symmetrically arranged with screw thread pin hole, the threaded
The internal whorl in hole is connected with cam rivet, and the surface of the camshaft main body is provided with venthole, the middle air hose and logical
Stomata connection, the right end face of the camshaft main body are fixedly connected with transmission gear.
Preferably, the camshaft main body uses No. 45 steel.
Preferably, the admission cam and exhaust cam use integral structure.
Preferably, the transmission gear uses CRMnTi.
Preferably, the admission cam and exhaust cam use steel alloy 40Cr.
Preferably, the exhaust cam is processed according to following technique:
Step 1: blanking, selects circle steel alloy 40Cr as blank；
Step 2: heat treatment, circular blank is placed in the heat treatment furnace, is heated, and temperature setting is 1000 DEG C -1100
℃；
It is rolled Step 3: the blank after heat treatment is placed in axial rolling machine, total rolling pass number >=1；
Step 4: modulation treatment, by the part after heat treatment, 950 DEG C at a temperature of save 20 minutes, then take out zero
Part cools down in the oil, and hardness is made to meet 28~30HRC, is tempered again into furnace, and temperature is controlled at 600 DEG C, keeps the temperature 15 minutes；
Step 5: Vehicle Processing and deburring operation.
Preferably, the breaking down temperature setting of blank is 900 DEG C -1000 DEG C in the step 3, behind the temperature that rolls every time
Degree is set as 800 DEG C -900 DEG C.
Preferably, the time that blank rolls every time in the step 3 is set as -30 minutes 20 minutes.
Preferably, heat treatment time is 20 minutes in the step 2.
Preferably, in the step 4, lathe in machining off-centre operation, according to the sequence of first thick rear essence.
(3) beneficial effect
The present invention provides a kind of automobile camshafts.Have it is following the utility model has the advantages that
(1), the automobile camshaft passes through air hose, venthole and middle air in being internally provided with of camshaft main body
Pipe connection, air can circulate in middle air hose and venthole, reached the dissipation for accelerating cam axle process heat, kept away
Exempting from heat concentration causes cam wear consumption serious, improves the purpose of the service life of camshaft.
(2), the automobile camshaft is arranged to split structure, root by camshaft main body and admission cam and exhaust cam
It according to function difference, is made of the material for being set as different, admission cam and exhaust cam use steel alloy Cr, and camshaft main body is adopted
With No. 45 steel, reaches and avoided mandrel integrated with cam function, improved the torsional strength of mandrel and the wearability of cam, together
When convenient for components with changing, reduce part with the purpose of the economic attrition changed.
Detailed description of the invention
Fig. 1 is the whole structural schematic diagram of the present invention；
Fig. 2 is the cross-sectional view at A-A of the present invention.
In figure: 1 camshaft main body, 2 confinement blocks, 3 admission cams, 4 exhaust cams, air hose in 5,6 screw thread pin holes, 7 convex
Take turns rivet, 8 ventholes, 9 transmission gears.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The present invention provides a kind of technical solution referring to FIG. 1-2: a kind of automobile camshaft, including camshaft main body 1, convex
The surface two sides of hub body 1 are fixedly connected to confinement block 2, and the position between confinement block 2 is arranged with admission cam 3, air inlet
The bottom end of cam 3 is fixedly connected with exhaust cam 4, and camshaft main body 1 is internally provided with middle air hose 5,1 He of camshaft main body
The two sides of admission cam 3 are symmetrically arranged with screw thread pin hole 6, and the internal whorl of screw thread pin hole 6 is connected with cam rivet 7, cam
The surface of shaft body 1 is provided with venthole 8, and middle air hose 5 is connected to venthole 8, and the right end face of camshaft main body 1 is fixed to be connected
It is connected to transmission gear 9.Camshaft main body 1 uses No. 45 steel.Admission cam 3 and exhaust cam 4 use integral structure.Driving cog
Wheel 9 uses 20CRMnTi.Admission cam 3 and exhaust cam 4 use steel alloy 40Cr.
Exhaust cam is processed according to following technique:
Step 1: blanking, selects circle steel alloy 40Cr as blank；
Step 2: heat treatment, circular blank is placed in the heat treatment furnace, is heated, and temperature setting is 1000 DEG C -1100
℃；
It is rolled Step 3: the blank after heat treatment is placed in axial rolling machine, total rolling pass number >=1；
Step 4: modulation treatment, by the part after heat treatment, 950 DEG C at a temperature of save 20 minutes, then take out zero
Part cools down in the oil, and hardness is made to meet 28~30HRC, is tempered again into furnace, and temperature is controlled at 600 DEG C, keeps the temperature 15 minutes；
Step 5: Vehicle Processing and deburring operation.The breaking down temperature setting of blank is 900 DEG C -1000 DEG C in step 3, after
The temperature setting that face rolls every time is 800 DEG C -900 DEG C.The time that blank rolls every time in step 3 be set as 20 minutes -30 points
Clock.Heat treatment time is 20 minutes in step 2.In step 4, lathe in machining off-centre operation, according to the sequence of first thick rear essence.
In use, by being internally provided with of camshaft main body 1 air hose 5, venthole 8 be connected to middle air hose 5,
Air can circulate in middle air hose 5 and venthole 8, reached the dissipation for accelerating cam axle process heat, avoided heat
It causes cam wear consumption serious in quantity set, improves the purpose of the service life of camshaft.It is convex by camshaft main body 1 and air inlet
Wheel 3 and exhaust cam 4 are arranged to split structure, according to function difference, are made of the material for being set as different, 3 He of admission cam
Exhaust cam 4 uses steel alloy 40Cr, and camshaft main body uses No. 45 steel, to avoiding mandrel integrated with cam function,
It improves the torsional strength of mandrel and the wearability of cam, while convenient for components with changing, reduces part with the economic attrition that changes
Purpose.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions.By sentence " element limited including one ..., it is not excluded that
There is also other identical elements in the process, method, article or apparatus that includes the element ".
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (10)
1. a kind of automobile camshaft, including camshaft main body (1), it is characterised in that: the surface two sides of the camshaft main body (1)
It is fixedly connected to confinement block (2), the position between the confinement block (2) is arranged with admission cam (3), the admission cam
(3) bottom end is fixedly connected with exhaust cam (4), being internally provided with middle air hose (5) for the camshaft main body (1), described
The two sides of camshaft main body (1) and admission cam (3) are symmetrically arranged with screw thread pin hole (6), the inside of the screw thread pin hole (6)
It is threaded with cam rivet (7), the surface of the camshaft main body (1) is provided with venthole (8), the middle air hose (5)
It is connected to venthole (8), the right end face of the camshaft main body (1) is fixedly connected with transmission gear (9).
2. a kind of automobile camshaft according to claim 1, it is characterised in that: the camshaft main body (1) uses No. 45
Steel.
3. a kind of automobile camshaft according to claim 1, it is characterised in that: the admission cam (3) and exhaust cam
(4) integral structure is used.
4. a kind of automobile camshaft according to claim 1, it is characterised in that: the transmission gear (9) uses
20CRMnTi。
5. a kind of automobile camshaft according to claim 1, it is characterised in that: the admission cam (3) and exhaust cam
(4) steel alloy 40Cr is used.
6. a kind of automobile camshaft according to claim 1, it is characterised in that: the exhaust cam (4) is according to following
Technique processing:
Step 1: blanking, selects circle steel alloy 40Cr as blank；
Step 2: heat treatment, circular blank is placed in the heat treatment furnace, is heated, and temperature setting is 1000 DEG C -1100 DEG C；
It is rolled Step 3: the blank after heat treatment is placed in axial rolling machine, total rolling pass number >=1；
Step 4: modulation treatment, by the part after heat treatment, 950 DEG C at a temperature of save 20 minutes, then take out part,
It cools down in the oil, hardness is made to meet 28~30HRC, be tempered again into furnace, temperature is controlled at 600 DEG C, keeps the temperature 15 minutes；
Step 5: Vehicle Processing and deburring operation.
7. a kind of automobile camshaft according to claim 6, it is characterised in that: the breaking down temperature of blank in the step 3
Be set as 900 DEG C -1000 DEG C, behind the temperature setting that rolls every time be 800 DEG C -900 DEG C.
8. a kind of automobile camshaft according to claim 6, it is characterised in that: blank rolls every time in the step 3
Time is set as -30 minutes 20 minutes.
9. a kind of automobile camshaft according to claim 6, it is characterised in that: heat treatment time is 20 in the step 2
Minute.
10. a kind of automobile camshaft according to claim 6, it is characterised in that: in the step 4, lathe in machining
Off-centre operation, according to the sequence of first thick rear essence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810877228.7A CN109139166A (en) | 2018-08-03 | 2018-08-03 | A kind of automobile camshaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810877228.7A CN109139166A (en) | 2018-08-03 | 2018-08-03 | A kind of automobile camshaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109139166A true CN109139166A (en) | 2019-01-04 |
Family
ID=64791531
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810877228.7A Pending CN109139166A (en) | 2018-08-03 | 2018-08-03 | A kind of automobile camshaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109139166A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113958685A (en) * | 2021-11-08 | 2022-01-21 | 重庆市巨亮机械制造有限责任公司 | Powder metallurgy camshaft end combination |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2052045U (en) * | 1989-07-13 | 1990-01-31 | 山东省莱阳市粉末冶金厂 | Camshaft for combined interanl combustion engine |
| US5435207A (en) * | 1992-07-13 | 1995-07-25 | The Torrington Company | Camshaft and method of making a camshaft |
| CN103433709A (en) * | 2013-08-28 | 2013-12-11 | 宁波富莱茵汽车部件有限公司 | Processing technology of camshaft |
| CN203669949U (en) * | 2013-11-16 | 2014-06-25 | 重庆金桥机器制造有限责任公司 | Four-cylinder double overhead automobile camshaft |
| CN104439936A (en) * | 2014-11-06 | 2015-03-25 | 无锡市百顺机械厂 | Machining technology of camshaft |
| CN105328085A (en) * | 2015-11-19 | 2016-02-17 | 西安建筑科技大学 | Cam processing process |
| CN106837453A (en) * | 2017-01-19 | 2017-06-13 | 奇瑞汽车股份有限公司 | A kind of Combined hollow camshaft and its processing technology |
-
2018
- 2018-08-03 CN CN201810877228.7A patent/CN109139166A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2052045U (en) * | 1989-07-13 | 1990-01-31 | 山东省莱阳市粉末冶金厂 | Camshaft for combined interanl combustion engine |
| US5435207A (en) * | 1992-07-13 | 1995-07-25 | The Torrington Company | Camshaft and method of making a camshaft |
| CN103433709A (en) * | 2013-08-28 | 2013-12-11 | 宁波富莱茵汽车部件有限公司 | Processing technology of camshaft |
| CN203669949U (en) * | 2013-11-16 | 2014-06-25 | 重庆金桥机器制造有限责任公司 | Four-cylinder double overhead automobile camshaft |
| CN104439936A (en) * | 2014-11-06 | 2015-03-25 | 无锡市百顺机械厂 | Machining technology of camshaft |
| CN105328085A (en) * | 2015-11-19 | 2016-02-17 | 西安建筑科技大学 | Cam processing process |
| CN106837453A (en) * | 2017-01-19 | 2017-06-13 | 奇瑞汽车股份有限公司 | A kind of Combined hollow camshaft and its processing technology |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113958685A (en) * | 2021-11-08 | 2022-01-21 | 重庆市巨亮机械制造有限责任公司 | Powder metallurgy camshaft end combination |
| CN113958685B (en) * | 2021-11-08 | 2024-03-12 | 重庆市巨亮机械制造有限责任公司 | Powder metallurgy camshaft end combination |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190104 |
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| RJ01 | Rejection of invention patent application after publication |