CN104405463A - Cam shaft - Google Patents
Cam shaft Download PDFInfo
- Publication number
- CN104405463A CN104405463A CN201410745621.2A CN201410745621A CN104405463A CN 104405463 A CN104405463 A CN 104405463A CN 201410745621 A CN201410745621 A CN 201410745621A CN 104405463 A CN104405463 A CN 104405463A
- Authority
- CN
- China
- Prior art keywords
- cam
- central shaft
- limit position
- camshaft
- position part
- 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
-
- 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
- F01L2001/0473—Composite camshafts, e.g. with cams or cam sleeve being able to move relative to the inner camshaft or a cam adjusting rod
Abstract
The invention discloses a cam shaft. The cam shaft comprises a central shaft, at least two cam wheels, and at least one limiting member which is used for limiting the relative position between the cam wheels; the central shaft is in the shape of a circular tube; the cam wheels are sleeved on the central shaft and firmly stick to the central shaft; a spline which is used for limiting the cam wheels to rotate around the central shaft is installed between the central shaft and the cam wheels, and the spline is respectively in interference fit with the cam wheels and the central shaft; the limiting member which is sleeved on the central shaft is in the shape of a circular tube, and the limiting member is arranged at the end portion of the central shaft and selectively arranged between the two cam wheels; the limiting member is fixed with respect to the central shaft; and the cam wheels are bearing steel cam wheels or powder metallurgy cam wheels. The cam shaft effectively solves the problem that the cam shaft is difficult to be machined.
Description
Technical field
The present invention relates to gearing field, more particularly, relate to a kind of camshaft.
Background technique
What current people more and more valued for automobile is himself Security, energy saving and travelling comfort, so the motor of automobile then has the characteristics such as high strength, low fuel consumption rate and high-durability.And camshaft is as the critical component of engine valve actuating mechanism, in engine operational cycle, its reasonably controls the unlatching of inlet and exhaust valve, shut-in time and folding amount, make mixed gas Thorough combustion after the fuel oil of overcompression, promotion piston movement does work, so its structural design and quality of processing will directly have influence on the performance of motor.Along with the power of motor and rotating speed increasing, more and more higher in intensity and support to the wheel shaft of camshaft, require also very high to the smoothness of the profile of cam and roughness etc.
In prior art, conventional a cam shaft blank, the normally blank of cast iron cam shaft, then blank obtains last camshaft through roughing repeatedly and fine finishing.Due to be camshaft is processed into one, and the angle requirement of each cam on camshaft is inconsistent, also to the eccentric size of cam and the required precision of surface size equidimension high especially, so the blank dimension of camshaft will have enough well-to-do, but need the material removing a large amount of camshafts like this, add the waste of resource, and once camshaft manufacture process is made a fault, cause whole camshaft to become waste material, increase the pressure of environment, also add processing difficulties.And the quantity of the cam of different camshafts, position relationship, size are not identical, this also makes the complex procedures of the blank of manufacture camshaft various.
In sum, how effectively solving the problem of camshaft processing difficulties, is current those skilled in the art's urgent problem.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of camshaft, this camshaft solves the problem of camshaft processing difficulties effectively.
In order to achieve the above object, the invention provides following technological scheme:
A kind of camshaft, comprise central shaft, at least two cams and at least one is for limiting the limit position part of relative position between described cam, described central shaft is tubular type, together with described cam is enclosed within and fits tightly on described central shaft and with described central shaft, have between described central shaft and described cam limit described cam around the spline of described central axis and described spline respectively with described cam and described central shaft interference fit, the described limit position part be enclosed within described central shaft is tubular type and is arranged in the end of described central shaft and optionally arranges between two described cams, described limit position part is relative with described central shaft fixing, described cam is Bearing Steel cam or P/M cam.
Preferably, the two ends of described central shaft have the fixed block coordinated with described central axle threads respectively, and two described fixed block co-extrusion are positioned at cam and the limit position part of two described fixed block centres.
Preferably, the two ends of described cam are welded with described central shaft, and described limit position part welds with described cam.
Camshaft provided by the invention, this camshaft comprises central shaft, cam and limit position part, wherein central shaft is tubular type, together with at least two cam covers fit tightly on center shaft and with central shaft, the outer diameter of axle of the through hole and central shaft that namely refer to cam matches, have between central shaft and cam restriction cam around the spline of central axis and spline respectively with cam and central shaft interference fit.Cover limit position part on center shaft at least there is one and limit position part for limiting relative position between cam, this limit position part is tubular type and is arranged in the end of central shaft and is selectively arranged between two cams, because two cams may fit tightly together, and without the need to arranging limit position part between these two cams.Limit position part is relative with central shaft fixing.And cam should select Bearing Steel cam or P/M cam.
According to above-mentioned technological scheme, can know that scheme convexity wheel shaft no longer adopts the camshaft of integral type, the camshaft in this programme divides the parts in order to several simple structure, and is not affecting the service behaviour of this camshaft entirety, has done above-mentioned Curve guide impeller.Wherein and the relatively-stationary limit position part of central shaft can ensure between multiple cam relative position, to prevent cam sideslip.Wherein spline ensure that the relative angle placed between multiple cam.Central shaft adopts tubular type can effectively reduce the quality of whole camshaft.The all parts structure of this camshaft split is simple, cam can processing in batching multiple, so manufacturing procedure reduces, make processing simple, so this camshaft effectively can solve original camshaft processing difficulties problem.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technological scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The structural representation of the camshaft that Fig. 1 provides for the embodiment of the present invention.
In accompanying drawing, mark is as follows:
Central shaft 1, cam 2, limit position part 3.
Embodiment
The embodiment of the invention discloses a kind of camshaft, solve the problem of camshaft processing difficulties.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technological scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Refer to Fig. 1, the structural representation of the camshaft that Fig. 1 provides for the embodiment of the present invention.
In a kind of specific embodiment, present embodiments provide a kind of camshaft, this camshaft comprises central shaft 1, cam 2 and limit position part 3, its central shaft 1 is tubular type, central shaft 1 can reduce a part of material of central shaft 1 for tubular type, to reduce the weight of whole camshaft, and can prop up device in the later stage in the increase of central shaft 1 inside, to expand the external diameter of central shaft 1, make central shaft 1 and exterior part interference fit.Together with having at least two cams 2 to be enclosed within to fit tightly on central shaft 1 and with central shaft 1, the outer diameter of axle of the through hole and central shaft 1 that namely refer to cam 2 matches, and radially moves to prevent cam 2.Have the spline that restriction cam 2 rotates around central shaft 1 between central shaft 1 and cam 2, wherein spline also can be a part for central shaft 1.But the spline herein should emphasized respectively with cam 1 and central shaft 2 interference fit, with prevent impulsive load damage spline, cause between central shaft 1 and cam 2 loosen.The limit position part 3 be enclosed within central shaft 1 at least there is one and limit position part 3 for limiting relative position between cam 2, because the relative position on a camshaft between each cam 2 affects the use of this camshaft, so the position between cam 2 should be limited, and prevent the axis of cam 2 centrally axle 1 from moving.This limit position part 3 is in tubular type and be arranged in the end of central shaft 1 and be selectively arranged between two cams 2, because two cams 2 may be fit tightly together, and without the need to arranging limit position part 3 between these two cams 2.Limit position part 3 is arranged to tubular type, can make limit position part 3 uniform force and not yielding.Simultaneously limit position part 3 is relative with central shaft 1 fixing, just can play the relative position between restriction cam 2 and stop the axis of cam 2 centrally axle 1 to move.Simultaneously also it is emphasized that the length of different position limit position part 3 here can be different, as long as limit position part 3 can ensure the relative position between cam 2.And cam 2 should select Bearing Steel cam or P/M cam, the intensity of such guarantee cam 1 and hardness.
Wherein relative fixing between central shaft 1 with cam 2, fixing mode can be that bolt is fixed, also can be interference fit, when the way preferably adopted installs a fixed block respectively in two outer ends of central shaft 1, two fixed blocks and central shaft 1 screw-thread fit, and two fixed blocks extrude the cam 2 be positioned in the middle of these two fixed blocks and limit position part 3 jointly, make between limit position part 2 with central shaft 1 relative fixing.This means of fixation is simply firm, and detachability is strong.
In order to can make cam 2 and central shaft 1 and and there is between limit position part 3 better relatively-stationary relation, the two ends of cam 2 and central shaft 1 can be made to weld together, and cam 2 and limit position part 3 all should have the cell body holding this weld simultaneously.And limit position part 3 and cam 2 weld together, and can reduce the possibility of clashing between limit position part 3 and cam 2, and it is relative fixing to further enhance between cam 2 with central shaft 1.
In this specification, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (3)
1. a camshaft, it is characterized in that, comprise central shaft (1), at least two cams (2) and at least one is for limiting the limit position part (3) of relative position between described cam (2), described central shaft (1) is tubular type, it is upper and together with fitting tightly with described central shaft (1) that described cam (2) is enclosed within described central shaft (1), have between described central shaft (1) and described cam (2) limit described cam (2) around the spline of described central axis and described spline respectively with described cam (2) and described central shaft (1) interference fit, being enclosed within described limit position part (3) on described central shaft (1) in tubular type is arranged in the end of described central shaft (1) and optionally arranges between two described cams (2), described limit position part (3) is relative fixing with described central shaft (1), described cam is Bearing Steel cam or P/M cam.
2. camshaft according to claim 1, it is characterized in that, the two ends of described central shaft (1) have the fixed block with described central shaft (1) screw-thread fit respectively, and two described fixed block co-extrusion are positioned at cam (2) and the limit position part (3) of two described fixed block centres.
3. camshaft according to claim 1, is characterized in that, the two ends of described cam (2) are welded with described central shaft (1), and described limit position part (3) welds with described cam (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410745621.2A CN104405463A (en) | 2014-12-08 | 2014-12-08 | Cam shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410745621.2A CN104405463A (en) | 2014-12-08 | 2014-12-08 | Cam shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104405463A true CN104405463A (en) | 2015-03-11 |
Family
ID=52643118
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410745621.2A Pending CN104405463A (en) | 2014-12-08 | 2014-12-08 | Cam shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104405463A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112922689A (en) * | 2021-02-26 | 2021-06-08 | 四川银钢一通凸轮轴有限公司 | Combined camshaft |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2422449Y (en) * | 2000-04-30 | 2001-03-07 | 李传彬 | Composite hollow camshaft |
| CN2816360Y (en) * | 2005-08-16 | 2006-09-13 | 成都市西菱汽车配件有限责任公司 | Assembled welding-type camshaft |
| CN201568089U (en) * | 2009-05-18 | 2010-09-01 | 李桃 | Camshaft |
| EP2286067A1 (en) * | 2008-05-29 | 2011-02-23 | Thyssenkrupp Presta Teccenter Ag | Adjustable camshaft arrangement |
| CN102191960A (en) * | 2010-03-10 | 2011-09-21 | 通用汽车环球科技运作有限责任公司 | Camshaft including weight reducing features and method of forming |
| CN103277159A (en) * | 2013-05-15 | 2013-09-04 | 奇瑞汽车股份有限公司 | Cam shaft mechanism with cylinder extinguishing function |
| CN103711537A (en) * | 2012-09-29 | 2014-04-09 | 北京汽车动力总成有限公司 | Camshaft |
| CN203717057U (en) * | 2014-02-18 | 2014-07-16 | 温州市鹰武凸轮轴有限公司 | Assembly type camshaft |
| CN103967549A (en) * | 2014-05-21 | 2014-08-06 | 中国第一汽车股份有限公司 | One-cylinder multiple-cam combined type cam shaft |
| CN203962065U (en) * | 2014-07-18 | 2014-11-26 | 泰州市宏祥动力机械有限公司 | A kind of camshaft |
| CN204299636U (en) * | 2014-12-08 | 2015-04-29 | 重庆市银钢一通科技有限公司 | A kind of camshaft |
-
2014
- 2014-12-08 CN CN201410745621.2A patent/CN104405463A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2422449Y (en) * | 2000-04-30 | 2001-03-07 | 李传彬 | Composite hollow camshaft |
| CN2816360Y (en) * | 2005-08-16 | 2006-09-13 | 成都市西菱汽车配件有限责任公司 | Assembled welding-type camshaft |
| EP2286067A1 (en) * | 2008-05-29 | 2011-02-23 | Thyssenkrupp Presta Teccenter Ag | Adjustable camshaft arrangement |
| CN201568089U (en) * | 2009-05-18 | 2010-09-01 | 李桃 | Camshaft |
| CN102191960A (en) * | 2010-03-10 | 2011-09-21 | 通用汽车环球科技运作有限责任公司 | Camshaft including weight reducing features and method of forming |
| CN103711537A (en) * | 2012-09-29 | 2014-04-09 | 北京汽车动力总成有限公司 | Camshaft |
| CN103277159A (en) * | 2013-05-15 | 2013-09-04 | 奇瑞汽车股份有限公司 | Cam shaft mechanism with cylinder extinguishing function |
| CN203717057U (en) * | 2014-02-18 | 2014-07-16 | 温州市鹰武凸轮轴有限公司 | Assembly type camshaft |
| CN103967549A (en) * | 2014-05-21 | 2014-08-06 | 中国第一汽车股份有限公司 | One-cylinder multiple-cam combined type cam shaft |
| CN203962065U (en) * | 2014-07-18 | 2014-11-26 | 泰州市宏祥动力机械有限公司 | A kind of camshaft |
| CN204299636U (en) * | 2014-12-08 | 2015-04-29 | 重庆市银钢一通科技有限公司 | A kind of camshaft |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112922689A (en) * | 2021-02-26 | 2021-06-08 | 四川银钢一通凸轮轴有限公司 | Combined camshaft |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150311 |