CN208310861U - A kind of assembled camshaft - Google Patents
A kind of assembled camshaft Download PDFInfo
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- CN208310861U CN208310861U CN201820919935.3U CN201820919935U CN208310861U CN 208310861 U CN208310861 U CN 208310861U CN 201820919935 U CN201820919935 U CN 201820919935U CN 208310861 U CN208310861 U CN 208310861U
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- steel pipe
- end component
- annular knurl
- outer circle
- pin hole
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Abstract
The utility model discloses a kind of assembled camshafts, it includes steel pipe, the both ends of steel pipe pass through interference fit connection with first end component and second end component respectively, first end component and steel pipe interconnecting piece are provided with outer circle annular knurl, positioning ring is provided on rear side of outer circle annular knurl, one middle side part of the deviation steel pipe of first end component offers transmission pin hole, and the adjacent position for being driven pin hole offers dowel hole in parallel；It is smooth outer circle with steel pipe interconnecting piece on second end component, the outer diameter of the smooth outer circle, which is greater than, offers receiving hole at position corresponding with transmission pin hole with the pipe diameter at adjoining position, the end of second end component.The utility model is able to bear high tensile strength, static torque, dynamic torque and is resistant to high circulation number.
Description
Technical field
The utility model relates to technical field of engines, and in particular to a kind of assembled camshaft.
Background technique
The effect of camshaft is to control the unlatching and closed action of valve.Usually it revolving speed it is still very high, and need
Very big torque is born, therefore very high to requirement of the camshaft in terms of intensity and support in design.Especially strong to tension
Degree, static torque, dynamic torque and cycle-index have in six cylinder diesel engines of high requirement.
Six cylinder diesel engines, often require that high-power, large torque, propose to the bond quality of extremity piece and steel pipe higher
It is required that.It is very poor to be particularly applied to plateau mountain area road environment, and carload is required in high environment.It is fully loaded in automobile
In the case where, need automobile to meet different kinds of roads situation, such as climbing, emergency braking, high speed rotation operating condition, therefore to automobile
The requirement of camshaft is higher, it is often necessary to be able to bear the static torque not less than 400N.m, moreover it is possible to bear the dynamic of ± 250N.m
State torque, and can recycle 7,000,000 times or more.
Currently, being suitable for the camshaft of diesel engine in order to guarantee torque and transmission effect, generally using whole bar
Processing or bar rolling post-processing form, and processing technology is tediously long, production efficiency is low, due to bar or rolling material for entirety,
Material selection is single, and the high-mechanic carrier that can not meet plateau mountain area simultaneously wants high intensity, high rigidity, high-wearing feature
It asks.
Utility model content
The utility model is directed to the above-mentioned deficiency of the prior art, provides one kind and is able to bear high tensile strength, static state
Torque, dynamic torque and the assembled camshaft for being resistant to high circulation number.
In order to solve the above technical problems, the utility model uses following technical proposal:
Provide a kind of assembled camshaft comprising steel pipe, the both ends of steel pipe respectively with first end component and second end
Component is connected by interference fit, and the junction of first end component and steel pipe is provided with outer circle annular knurl, is set on rear side of outer circle annular knurl
It is equipped with positioning ring, the middle side part that first end component deviates steel pipe offers transmission pin hole, is driven the neighbouring first end of pin hole
Dowel hole is offered in parallel at the position of part side；The junction of second end component and steel pipe is smooth outer circle, described smooth
The outer diameter of outer circle is greater than the pipe diameter for being adjacent place, and the end of second end component opens up at position corresponding with transmission pin hole
There is receiving hole；
Positioning annular knurl is provided with using rolling on the outer diameter of steel pipe, steel pipe passes through the inner hole mistake on positioning annular knurl and cam bit
It is full of cooperation；The quantity of cam bit be six groups, every group at least one；The relative distance and steering angle of every group of cam bit are all the same.
In above-mentioned technical proposal, it is preferred that positioning annular knurl, outer circle annular knurl are the longitudinal rolling in the same direction with steel pipe axial line
Flower.
In above-mentioned technical proposal, it is preferred that outer circle annular knurl is in gear-like, and the pitch of outer circle annular knurl is 1mm, diameter is
35.75 ± 0.05mm, tooth top is in camber line and width is 0.23mm, tooth root is circular arc and radius is 0.1mm, 87 ° of tooth form angle.
In above-mentioned technical proposal, it is preferred that positioning annular knurl is in gear-like, and the pitch for positioning annular knurl is 1mm, outer diameter is
45.85 ± 0.05mm, tooth top is in camber line and width is 0.2mm, tooth root is circular arc and radius is 0.1mm, 90 ° of tooth form angle.
In above-mentioned technical proposal, it is preferred that diameter of bore is 45.6 ± 0.03mm.
In above-mentioned technical proposal, it is preferred that pipe diameter is 35.5 ± 0.05mm, and outer diameter is 45.5 ± 0.05mm.
The main beneficial effect of said combination formula camshaft provided by the utility model is:
Steel pipe is connect by outer circle annular knurl with the smooth inner tube of steel pipe with first end component, and is arranged on rear side of outer circle annular knurl
Positioning ring, when so that first end component and steel pipe are by interference fit connection, the end of steel pipe is abutted with positioning ring, it is possible thereby to
The relative position of first end component and steel pipe is limited by positioning ring；The interference fit connection realized by outer circle annular knurl, guarantees
The stability and torque conduction that first end component is connect with steel pipe.
By the way that transmission pin hole and dowel hole are arranged on first end component, and setting and trundle on second end component
The receiving hole of hole cooperation；It is fixed using transmission pin hole and receiving hole cooperation, the position of fixed camshaft；By dowel hole to convex
Wheel shaft carries out angle positioning.
By setting corresponding size for the outer diameter of steel pipe, internal diameter, therefore after steel pipe is in conjunction with extremity piece, has and be able to bear
Static torque not less than 500N.m, moreover it is possible to bear the dynamic torque of ± 350N.m, and can recycle 7,000,000 times or more.
By on the outer diameter of steel pipe rolling be provided with positioning annular knurl, and cooperate with the cam bit of specific dimensions, make cam
There is piece the static torque being able to bear not less than 400N.m to see that the dynamic torque of receiving ± 250N.m can simultaneously recycle 7,000,000 times
More than.
Detailed description of the invention
Fig. 1 is the cross-sectional view of assembled camshaft.
Fig. 2 is the structural schematic diagram of first end component.
Fig. 3 is the partial enlarged view for positioning annular knurl.
Fig. 4 is the side view of assembled camshaft.
Fig. 5 is the experimental data figure that assembled camshaft carries out tensile strength test.
Wherein, 1, first end component, 11, outer circle annular knurl, 12, positioning ring, 13, transmission pin hole, 14, dowel hole, 2, steel
Pipe, 21, positioning annular knurl, 3, cam bit, 31, inner hole, 4, second end component, 41, receiving hole.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawing:
As shown in Figure 1, it is the structural schematic diagram of assembled camshaft.
The assembled camshaft of the utility model includes steel pipe 2, the both ends of steel pipe 2 respectively with first end component 1 and second
End pieces 4 are by interference fit connection, and first end component 1 and 2 interconnecting piece of steel pipe are provided with outer circle annular knurl 11, as shown in Fig. 2, outside
The rear side of circle annular knurl 11 is provided with positioning ring 12, and a middle side part of the deviation steel pipe 2 of first end component 1 offers transmission pin hole
13, the adjacent position of transmission pin hole 13 offers dowel hole 14 in parallel；On second end component 4 with 2 interconnecting piece of steel pipe be light
Sliding outer circle, the outer diameter of smooth outer circle are greater than and 2 internal diameter of steel pipe at adjoining position, the end of second end component 4 and transmission pin hole
Receiving hole 41 is offered at 13 corresponding positions.
As shown in figure 3, rolling is provided with positioning annular knurl 21 on the outer diameter of steel pipe 2, steel pipe 2 passes through positioning annular knurl 21 and cam
Inner hole 31 on piece 3 passes through interference fit connection.
The quantity of the cam bit be six groups, every group at least one；The relative distance and steering angle phase of every group of cam bit
Together, as shown in Figure 4.
Wherein, annular knurl 21 is positioned, outer circle annular knurl 11 is longitudinal annular knurl；Outer circle annular knurl 11 is in gear-like, outer circle annular knurl 11
Pitch is 1mm, diameter is 35.75 ± 0.05, tooth top is in camber line and width is 0.23mm, tooth root is circular arc and radius is 0.1mm, tooth
87 ° of shape angle.
Proving test is carried out to the performance of camshaft provided by the utility model below:
It is practical to this to meet requirement of the high-mechanic carrier in plateau mountain area to high intensity, high rigidity, high-wearing feature
Camshaft provided by novel carries out the proving test of static torque, dynamic torque ability to bear.
As shown in table 1, to guarantee that camshaft can bear the static torque of 400N.m or more, first to steel pipe 2 and first
Connection between end pieces 1 is tested, and taking target quiescent torque is that 500N.m carries out distortion testing experiment, is being tested repeatedly
In, the failure torque of structure provided by the utility model is all larger than nominal quiescent torque.
Table 1
As shown in table 2, to guarantee that camshaft can bear the dynamic torque of ± 250N.m or more, to steel pipe 2 and first end
The test target of connection between component 1 takes dynamic torque to carry out distortion testing experiment for ± 400N.m, and in order to guarantee circulation 7
Million times or more, thus after the completion of by assembling cam shaft, dynamic torque test is carried out, it is convex to guarantee after 7,000,000 circulations
Wheel shaft structure does not loosen yet.In test repeatedly, structure provided by the utility model, which can guarantee, not to be loosened, therefore can be assert
It meets the requirements.
Table 2
For the camshaft after the completion of composition, since cam bit 3 and steel pipe 2 pass through positioning annular knurl 21 and realize that interference fit connects
It connects, therefore lower to the connection request between the steel pipe 2 opposite with the requirement that steel pipe 2 connects of cam bit 3 and first end component 1, answers
This at least meets the static torque that can be born not less than 400N.m, moreover it is possible to bear the dynamic torque of ± 250N.m, and can recycle 700
Ten thousand times or more.It is the structure for carrying out static torque verification test and dynamic torque verification test respectively such as table 3 and table 4, it can by table
Know, structure provided by the utility model meets sets requirement.
Table 3
| Serial number | Nominal quiescent torque | Failure torque | Determine | Serial number | Nominal quiescent torque | Failure torque | Determine |
| 1 | 400N.m | 430N.m | It is qualified | 11 | 400N.m | 436N.m | It is qualified |
| 2 | 400N.m | 483N.m | It is qualified | 12 | 400N.m | 439N.m | It is qualified |
| 3 | 400N.m | 445N.m | It is qualified | 13 | 400N.m | 500N.m | It is qualified |
| 4 | 400N.m | 472N.m | It is qualified | 14 | 400N.m | 455N.m | It is qualified |
| 5 | 400N.m | 479N.m | It is qualified | 15 | 400N.m | 473N.m | It is qualified |
| 6 | 400N.m | 448N.m | It is qualified | 16 | 400N.m | 420N.m | It is qualified |
| 7 | 400N.m | 451N.m | It is qualified | 17 | 400N.m | 433N.m | It is qualified |
| 8 | 400N.m | 462N.m | It is qualified | 18 | 400N.m | 437N.m | It is qualified |
| 9 | 400N.m | 434N.m | It is qualified | 19 | 400N.m | 450N.m | It is qualified |
| 10 | 400N.m | 429N.m | It is qualified | 20 | 400N.m | 442N.m | It is qualified |
Table 4
In actual use, there is also the requirement of tensile strength, the axis of usual six cylinders diesel engine for the steel pipe 2 of camshaft
Tensile strength should be not less than 700MPa, therefore, take steel pipe 2 carbon content be 0.2~0.25%, carry out metal tensile test.
As shown in Fig. 5 and table 5, the relationship of tensile strength Rm and pulling force Fm, sectional area So are therefore Rm=Fm/So is calculated most
Big tensile strength Rm is all larger than 700MPa, therefore structure provided by the utility model meets sets requirement.
Table 5
Specific embodiment of the present utility model is described above, in order to facilitate understanding by those skilled in the art
The utility model, it should be apparent that the utility model is not limited to the range of specific embodiment, to the common skill of the art
For art personnel, if various change the attached claims limit and determine the utility model spirit and scope in,
These variations are it will be apparent that all utilize the innovation and creation of the utility model design in the column of protection.
Claims (6)
1. a kind of assembled camshaft, which is characterized in that including steel pipe (2), the both ends of steel pipe (2) respectively with first end component
(1) it is connected with second end component (4) by interference fit, the junction of first end component (1) and steel pipe (2) is provided with outer circle rolling
It spends (11), is provided with positioning ring (12) on rear side of outer circle annular knurl (11), first end component (1) deviates a middle side part of steel pipe (2)
Transmission pin hole (13) is offered, is driven at the position of neighbouring first end component (1) side of pin hole (13) and offers positioning in parallel
Pin hole (14)；The junction of second end component (4) and steel pipe (2) is smooth outer circle, and the outer diameter of the smooth outer circle is greater than and it
Steel pipe (2) internal diameter of adjoiner, the end of second end component (4) offer receiving hole at position corresponding with transmission pin hole (13)
(41)；
Positioning annular knurl (21) is provided with using rolling on the outer diameter of steel pipe (2), steel pipe (2) passes through positioning annular knurl (21) and cam bit
(3) inner hole (31) interference fit on；
The quantity of the cam bit be six groups, every group at least one；The relative distance and steering angle of every group of cam bit are all the same.
2. assembled camshaft according to claim 1, which is characterized in that the positioning annular knurl (21), outer circle annular knurl
It (11) is the longitudinal annular knurl in the same direction with steel pipe axial line.
3. assembled camshaft according to claim 2, which is characterized in that the outer circle annular knurl (11) is in gear-like, outside
The pitch of circle annular knurl (11) is 1mm, diameter is 35.75 ± 0.05mm, tooth top in camber line and width be 0.23mm, tooth root be circular arc and
Radius is 0.1mm, 87 ° of tooth form angle.
4. assembled camshaft according to claim 2, which is characterized in that the positioning annular knurl (21) is in gear-like, fixed
The pitch of position annular knurl (21) is 1mm, outer diameter is 45.85 ± 0.05mm, tooth top in camber line and width be 0.2mm, tooth root be circular arc and
Radius is 0.1mm, 90 ° of tooth form angle.
5. assembled camshaft according to claim 4, which is characterized in that inner hole (31) diameter be 45.6 ±
0.03mm。
6. assembled camshaft according to claim 1, which is characterized in that steel pipe (2) internal diameter be 35.5 ±
0.05mm, outer diameter are 45.5 ± 0.05mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820919935.3U CN208310861U (en) | 2018-06-14 | 2018-06-14 | A kind of assembled camshaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820919935.3U CN208310861U (en) | 2018-06-14 | 2018-06-14 | A kind of assembled camshaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208310861U true CN208310861U (en) | 2019-01-01 |
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ID=64707137
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820919935.3U Active CN208310861U (en) | 2018-06-14 | 2018-06-14 | A kind of assembled camshaft |
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| Country | Link |
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| CN (1) | CN208310861U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108442990A (en) * | 2018-06-14 | 2018-08-24 | 成都金顶精密铸造有限公司 | A kind of assembled camshaft |
-
2018
- 2018-06-14 CN CN201820919935.3U patent/CN208310861U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108442990A (en) * | 2018-06-14 | 2018-08-24 | 成都金顶精密铸造有限公司 | A kind of assembled camshaft |
| CN108442990B (en) * | 2018-06-14 | 2024-02-13 | 成都金顶精密铸造有限公司 | Combined cam shaft |
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