CN206722890U - Sectional camshaft - Google Patents
Sectional camshaft Download PDFInfo
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- CN206722890U CN206722890U CN201720340458.0U CN201720340458U CN206722890U CN 206722890 U CN206722890 U CN 206722890U CN 201720340458 U CN201720340458 U CN 201720340458U CN 206722890 U CN206722890 U CN 206722890U
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- camshaft
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Abstract
The utility model discloses a kind of sectional camshaft, the sectional camshaft includes at least two camshaft units, and the camshaft unit includes：Axle body, cam and flange, the cam is set around the axle body, the flange is arranged on the end of the axle body, wherein, it is by the way that the flange of two adjacent camshaft units is connected that at least two camshaft unit is detachably connected successively.Such sectional camshaft, the compact connection between each camshaft unit can be ensured, ensure the overall bonding strength of sectional camshaft and positioning precision.
Description
Technical field
A kind of camshaft is the utility model is related to, more specifically designs a kind of sectional camshaft.
Background technology
Camshaft is one of important spare part of engine, the structure design of camshaft and the quality of crudy, to hair
The influence of motivation performance is very big.Now with engine is high-power, design requirement of high power density, to engine component,
As cam shaft design proposes higher design requirement.The engine of multi-cylinder increases the draw ratio of camshaft, compact-sized,
The requirement such as light quality, easy for installation all proposes bigger challenge to big L/D ratio cam shaft design.
Camshaft is more using monoblock type casting or forging at present, and this is little for draw ratio, and cam shaft length is low
It is more commonly used processing technology for 1.5 meters or so of camshaft.But grown for length (such as more than 1.5 meters), the diameter of axle
Small camshaft processing, because the long diameter of axle of length is small, is easily deformed, while be also limited by the length of lathe, it is difficult to process, also very
Card quality is difficult to ensure, therefore the monoblock type that numerous camshafts domestic at present processing producer is all unwilling to accept such camshaft adds
Work.
For such situation, sectional camshaft turns into suitable selection.As current multi-cylinder diesel engine compactedness designs
Proposition, the arrangement of each cylinder is compact, and the distance between each cylinder intake and exhaust cam greatly shortens, and frequently with the knot of solid box
Structure, then the connection design and installation technique between each section of sectional camshaft become design difficulty, conventional bolt connection is set
Meter encounters difficulty.
In order to solve the above problems at least in part, the utility model proposes a kind of sectional camshaft.
Utility model content
A series of concept of reduced forms is introduced in utility model content part, this will be in specific embodiment part
Middle further description.Utility model content part of the present utility model is not meant to attempt to limit claimed
Technical scheme key feature and essential features, do not mean that the guarantor for attempting to determine technical scheme claimed more
Protect scope.
In order to solve the above problems at least in part, according to one side of the present utility model, a kind of segmented is disclosed
Camshaft, the sectional camshaft include at least two camshaft units, and the camshaft unit includes：
Axle body；
Cam, the cam are set around the axle body；And
Flange, the flange are arranged on the end of the axle body,
Wherein, by the way that the flange of two adjacent camshaft units is connected at least two cam
Axle unit is detachably connected successively.
Preferably, connected between the flange of two adjacent camshaft units by stud.
Preferably, the length of the sectional camshaft is more than 1500mm.
Preferably, the diameter of axle of the sectional camshaft is less than 80mm.
Preferably, the diameter of the axle body of at least two camshaft unit is equal, in the sectional camshaft
The circle in the cylindrical axle center relative to the axle body of the cam, which is beated, is less than or equal to 0.05mm, institute in the camshaft unit
The basic circle for stating cam is less than or equal to 0.015mm relative to the circle bounce in the axle center of the axle body.
Preferably, the sectional camshaft includes three camshaft units.
Brief description of the drawings
The drawings below of the utility model embodiment is used to understand this practicality in this as a part of the present utility model
It is new.Shown in the drawings of embodiment of the present utility model and its description, for explaining principle of the present utility model.In accompanying drawing
In,
Fig. 1 is the overall schematic according to the sectional camshaft of a preferred embodiment of the present utility model；
Fig. 2 is the decomposing schematic representation of the sectional camshaft in Fig. 1；
Fig. 3 is the assembling schematic diagram of the sectional camshaft in Fig. 1
Fig. 4 is the assembling schematic diagram of the rear camshaft unit of the sectional camshaft in Fig. 1；
Fig. 5 A are the partial enlarged drawing of the C portion in Fig. 3；And
Fig. 5 B are the partial enlarged drawing of the D parts in Fig. 3.
Embodiment
In the following description, a large amount of concrete details are given more thoroughly to manage the utility model to provide
Solution.It will be apparent, however, to one skilled in the art that the utility model embodiment can be without one or more
These individual details and be carried out.In other examples, in order to avoid obscuring with the utility model embodiment, for
Some technical characteristics well known in the art are not described.
In order to thoroughly understand the utility model embodiment, detailed structure will be proposed in following description.Obviously, originally
The execution of utility model embodiment is not limited to the specific details that those skilled in the art is familiar with.
Fig. 1 to Fig. 5 B schematically illustrates sectional camshaft 100 of the present utility model and to assemble the segmented convex
The preferred embodiment of the method for wheel shaft.It is appreciated that sectional camshaft 100 of the present utility model can be diversified forms
The sectional camshaft being applied under varying environment, present embodiment sectional camshaft only in one form is as showing
Example.
Sectional camshaft 100 includes three camshaft units, and three camshaft units are sequentially connected so as to form segmentation
Formula camshaft 100.Three camshaft units being now arranged in order be referred to as lordosis hub unit 20, convexity hub unit 30 and after
Camshaft unit 40.Three camshaft unit structures are similar, same length, and such three camshaft units assemble composition
Segmentation camshaft 100, it can ensure that the structure of sectional camshaft 100 is relatively stable.
Illustrated the structure of each camshaft unit exemplified by camshaft unit 20 in the past.Lordosis hub unit 20 includes axle body 21
And the cam 22 around axle body 21, cam 22 are used for the opening and closing that air valve is driven in diesel engine.Lordosis hub unit 20 is in axle
The rear end of body 21 is additionally provided with front cam axle unit flange 23, and eight screw threads are equably set on front cam axle unit flange 23
Hole.It should be noted that it is each provided with lordosis hub unit 20, convexity hub unit 30 and rear camshaft unit 40
Flange, specifically, the rear end of lordosis hub unit 20 are provided with front cam axle unit flange 23, convexity hub unit 30 it is front and rear
Both ends are respectively arranged with the first cam axle unit flange 33a and the second cam axle unit flange 33b, and in rear camshaft
The front end of unit 40 is provided with rear camshaft unit flange 43.It should be noted that front cam axle unit flange 23, the first convexity
Hub unit flange 33a, the second cam axle unit flange 33b and rear camshaft unit flange 43 difference name only for
Convenient explanation, they can essentially be same or analogous structure.
Assembly crewman is connected between camshaft unit by the way that the flanges of two adjacent camshaft units is connected to realize,
Close connection is realized by stud between flange.Physical dimension, positioning method and the connection that will be mentioned hereinafter of flange
Mode, the design of compactedness principle is in accordance with, ensures the compact connection between flange.
The segmented that lordosis hub unit 20, convexity hub unit 30 and rear camshaft unit 40 are formed after being sequentially connected
Camshaft 100 has larger draw ratio, and after the completion of assembling, the maximum spacing between adjacent two cams is 40mm, and
Two cams with maximum spacing be belonging respectively to two camshaft units (for example, lordosis hub unit 20 most rearward one
Spacing between a most forward cam for individual cam and convexity hub unit 30 is 40mm).In present embodiment, segmented
The length of camshaft 100 is about 2000mm, and the diameter of axle is about φ 63mm.
It should be noted that consider the distance between length, the quantity of cam and cam of camshaft, existing processing energy
The problems such as power, the sectional camshaft 100 of present embodiment is designed as to include three camshaft units, three camshaft units
It is sequentially connected, stabilization when sectional camshaft 100 works can be met, excessively numerous and diverse production assembling fiber crops will not be produced again
It is tired.Certainly, in other unshowned embodiments, assembling manufacturing draw ratio is such as needed to be more than the segmented cam of present embodiment
The camshaft of axle 100, can be to include more than three camshaft units by the camshaft design.
The specific assembly method of sectional camshaft 100 is as shown in Fig. 3 to Fig. 5 B.First, to the He of lordosis hub unit 20
The connection method of convexity hub unit 30 is described.First lordosis hub unit 20 and convexity hub unit 30 are connected in advance
Connect, in the front cam axle unit flange 23 of lordosis hub unit 20 and the first cam axle unit flange of convexity hub unit 30
The drilling for housing straight pin 50 is got on 33a.Then, as shown in Figure 5A, first by one end of stud 61 (about
16.1mm length) high intensity thread locking agent is smeared, and this one end is screwed into the of convexity hub unit 30 from front to back
In one cam axle unit flange 33a screwed hole so that the end of this one end is protruded from the first of convexity hub unit 30
Camshaft unit flange 33a length H1 is 1.2 ± 0.1mm.
(about more than 24 hours) after thread locking agent is fully cured, by the lordosis hub unit of lordosis hub unit 20
Flange 23 is inserted in via the other end of screwed hole from stud 61.Then in the front cam axis element method of lordosis hub unit 20
Straight pin 50 is squeezed on first cam axle unit flange 33a of orchid 23 and convexity hub unit 30, straight pin 50 runs through lordosis
The front cam axle unit flange 23 of hub unit 20 and the first cam axle unit flange 33a of convexity hub unit 30.Afterwards,
By the front cam axle unit flange 23 of lordosis hub unit 20 and the first cam axle unit flange 33 of convexity hub unit 30
It is adjacent to.Finally, thread locking agent is smeared in the other end of stud 61, nut 62 is screwed to stud from this section.
The connected mode of convexity hub unit 30 and rear camshaft unit 40 is similar with the above method.
The assembly method of sectional camshaft 100 of the present utility model has higher precision, disclosure satisfy that to cam phase
The high requirement of parallactic angle and axial spacing.Sectional camshaft 100 after the completion of assembling, on the basis of A, B in Fig. 3, bearing
Cylindrical bounce is within 0.05mm.In order to ensure this precision, in each camshaft unit, on the basis of E, F, all cam base circles
Between and cam base circle relative to the radial run-out of axle body within 0.015mm.
Sectional camshaft 100 provided by the utility model and its assembly method, can efficiently solve big major diameter
Than the connectivity problem of camshaft sectional design, substantially reduce in heat treatment process and deform, improve the crudy of camshaft, drop
Low scrap cost, processing efficiency is improved, reduce dependence of the processing technology to process equipment.Segmented cam of the present utility model
Axle 100, there is higher bonding strength and positioning precision, the impact with engine power and rotating speed continuous improvement can be born
Load and the dynamic torque transmitted.
Unless otherwise defined, technology used herein and scientific terminology and the technology of technical field of the present utility model
The implication that personnel are generally understood that is identical.Term used herein is intended merely to describe specifically to implement purpose, it is not intended that limit
The utility model processed.Terms such as herein presented " settings " can both represent that a part was attached directly to another portion
Part, it can also represent that a part is attached to another part by middleware.Describe in one embodiment herein
Feature can be applied to another embodiment in combination individually or with further feature, unless this feature is in another implementation
Do not apply to or be otherwise noted in mode.
The utility model is illustrated by above-mentioned embodiment, but it is to be understood that, above-mentioned embodiment
The purpose illustrated and illustrated is only intended to, and is not intended to the utility model being limited in the range of described embodiment.This
Art personnel it is understood that more kinds of variants and modifications can also be made according to teaching of the present utility model, this
A little variants and modifications are all fallen within the utility model scope claimed.
Claims (6)
1. a kind of sectional camshaft, it is characterised in that the sectional camshaft includes at least two camshaft units, described
Camshaft unit includes：
Axle body；
Cam, the cam are set around the axle body；And
Flange, the flange are arranged on the end of the axle body,
Wherein, by the way that the flange of two adjacent camshaft units is connected at least two camshafts list
Member is detachably connected successively.
2. sectional camshaft according to claim 1, it is characterised in that the institute of two adjacent camshaft units
State and connected by stud between flange.
3. sectional camshaft according to claim 1, it is characterised in that the length of the sectional camshaft is more than
1500mm。
4. sectional camshaft according to claim 1, it is characterised in that the diameter of axle of the sectional camshaft is less than
80mm。
5. sectional camshaft according to claim 1, it is characterised in that at least two camshaft unit it is described
The diameter of axle body is equal, and the circle bounce in the cylindrical axle center relative to the axle body of cam described in the sectional camshaft is small
It is less than relative to the circle bounce in the axle center of the axle body in or equal to 0.05mm, the basic circle of cam described in the camshaft unit
Or equal to 0.015mm.
6. sectional camshaft according to claim 1, it is characterised in that the sectional camshaft includes three cams
Axle unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720340458.0U CN206722890U (en) | 2017-04-01 | 2017-04-01 | Sectional camshaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720340458.0U CN206722890U (en) | 2017-04-01 | 2017-04-01 | Sectional camshaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206722890U true CN206722890U (en) | 2017-12-08 |
Family
ID=60503077
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720340458.0U Active CN206722890U (en) | 2017-04-01 | 2017-04-01 | Sectional camshaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206722890U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108661738A (en) * | 2017-04-01 | 2018-10-16 | 中国船舶重工集团公司第七研究所 | The method of sectional camshaft and assembly sectional camshaft |
-
2017
- 2017-04-01 CN CN201720340458.0U patent/CN206722890U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108661738A (en) * | 2017-04-01 | 2018-10-16 | 中国船舶重工集团公司第七研究所 | The method of sectional camshaft and assembly sectional camshaft |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20201123 Address after: 201108 Shanghai city Minhang District Huaning Road No. 3111 Patentee after: Shanghai Marine Diesel Engine Research Institute Patentee after: SHANGHAI QIYAO HEAVY INDUSTRY CO.,LTD. Address before: 201108 Shanghai city Minhang District Huaning Road No. 3111 Patentee before: Shanghai Marine Diesel Engine Research Institute Patentee before: SHANGHAI QIYAO SYSTEM ENGINEERING Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 201108 Shanghai city Minhang District Huaning Road No. 3111 Patentee after: The 711 Research Institute of China Shipbuilding Corp. Patentee after: SHANGHAI QIYAO HEAVY INDUSTRY CO.,LTD. Address before: 201108 Shanghai city Minhang District Huaning Road No. 3111 Patentee before: Shanghai Marine Diesel Engine Research Institute Patentee before: SHANGHAI QIYAO HEAVY INDUSTRY CO.,LTD. |