CN203547820U - Crankshaft sprocket for engine timing chain system - Google Patents
Crankshaft sprocket for engine timing chain system Download PDFInfo
- Publication number
- CN203547820U CN203547820U CN201320678024.3U CN201320678024U CN203547820U CN 203547820 U CN203547820 U CN 203547820U CN 201320678024 U CN201320678024 U CN 201320678024U CN 203547820 U CN203547820 U CN 203547820U
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- CN
- China
- Prior art keywords
- sprocket
- crankshaft
- timing chain
- flange
- chain system
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- 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.)
- Expired - Lifetime
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- 238000004663 powder metallurgy Methods 0.000 claims description 6
- 238000004512 die casting Methods 0.000 claims description 2
- 238000009434 installation Methods 0.000 abstract description 4
- 238000004886 process control Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 9
- 238000005266 casting Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000007704 transition Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005755 formation reaction Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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Abstract
本实用新型属于汽车发动机领域，具体涉及一种用于发动机正时链系统的曲轴链轮。它包括链轮本体，所述链轮本体一端为用于与曲轴相配合的法兰盘，链轮本体另一端为用于与链条相配合的齿盘，所述法兰盘与齿盘同轴设置，所述链轮本体的轴向内孔为不同直径段的内孔结构，所述齿盘的前端面上设有正时标记。本实用新型不仅结构先进、功能完善，而且工艺易控、加工简单，还具有安装精度高、装配防错、便捷的特性。保证了曲轴链轮与曲轴之间在轴向、径向和角度的装配正确性和精度要求，以及正时链与曲轴链轮的正时准确性。
The utility model belongs to the field of automobile engines, in particular to a crankshaft sprocket used in an engine timing chain system. It includes a sprocket body, one end of the sprocket body is a flange for matching with the crankshaft, the other end of the sprocket body is a toothed plate for matching with the chain, and the flange and the toothed plate are coaxial It is provided that the axial inner hole of the sprocket body is an inner hole structure of different diameter sections, and timing marks are provided on the front end surface of the toothed disc. The utility model not only has advanced structure and perfect function, but also has easy process control and simple processing, and also has the characteristics of high installation precision, error-proof assembly and convenience. The correctness and accuracy requirements of axial, radial and angular assembly between the crankshaft sprocket and the crankshaft are guaranteed, as well as the timing accuracy of the timing chain and the crankshaft sprocket.
Description
Technical field
The utility model belongs to motor car engine field, is specifically related to a kind of crankshaft sprocket for engine timing chain system.
Background technique
It is one of major technique of Modern Engine that engine phase position is controlled.Engine ECU is by knowing accurately bent axle and the camshaft phase angle in engine operation process, make order according to the rules of each system, moment etc. carry out work, for example: the air inlet moment and air inflow, the oil spout moment and fuel injection quantity, time of ignition, valve opening and close moment, the VVT action moment and angle etc.Wherein be used for carrying out the positioning device of crank phase, the correct design of crankshaft sprocket, assembling etc. are most important concerning whole motor.The axis hole of existing crankshaft sprocket is all designed to same diameter, adds the whole fine finishing of man-hour requirement, and manufacturing procedure amount is large, and processing cost is high; And when crankshaft sprocket is assemblied on bent axle, long and can produce transition constraint to bent axle due to fitting surface, cause assembling difficulty.
Summary of the invention
The purpose of this utility model is exactly the deficiency existing in order to solve above-mentioned background technology, and a kind of crankshaft sprocket for engine timing chain system simple, installation precision is high that assembles is provided.
The technical solution adopted in the utility model is: a kind of crankshaft sprocket for engine timing chain system, comprise sprocket body, described sprocket body one end is the flange plate for matching with bent axle, the sprocket body the other end is the fluted disc for matching with chain, described flange plate and fluted disc coaxially arrange, the axial bore of described sprocket body is the inner hole structure of different-diameter section, and the front-end face of described fluted disc is provided with timing marks.
Further, described axial bore has comprised the finishing section of radial location effect, and finishing section both sides are for exempting from processing sections, and described finishing section diameter is less than exempts from processing sections diameter.Exempting from processing sections is powder metallurgy casting surface, does not play a part to install to coordinate, and finishing section is polished surface, is used for radially installing and being used in conjunction with.When crankshaft sprocket is assemblied on bent axle, only having finishing section is to contact the radial location effect of playing with bent axle, can avoid like this fitting surface long and produce Over-constrained, finally causes assembling difficult problem, can also reduce amount of finish, reduce the processing cost of part.
Further, the front-end face edge of described fluted disc is smooth curved surface.The both sides of front-end face are by arc transition, and after the fine finishing that completes front-end face, the burr of processing is the sharp corner in both sides all like this, and wedge angle both sides are cast blank face, do not affect normal use, so just removed the operation of deburring from, reduced amount of finish.
Further, described flange plate end face is provided with the locating stud coordinating with bent axle for sprocket body, described locating stud and flange plate global formation.Locating stud can guarantee that crankshaft sprocket and bent axle improve the precision coordinating when assembling.
Further, described locating stud is positioned at flange plate end face edge, and locating stud outer side surface flushes with flange plate side, and locating stud is arc surface with the inner side surface that on bent axle, keyway inwall contacts.When the contour shape of this locating stud can guarantee that crankshaft sprocket navigates to the keyway on bent axle by locating stud, the orientation type that the arc surface of locating stud contacts with Planar realization line on keyway, improves the accuracy of assembling.
Further, described sprocket body is the sprocket tooth structure of integrated type powder metallurgy die cast tool sharpening.The technique that adopts integral die-cast moulding, can reduce casting mould, reduces casting technique difficulty, has greatly reduced manufacturing procedure, cuts down finished cost.
Not only structure is advanced for crankshaft sprocket of the present utility model, Perfect in shape and function, and technique easily controls, processes simple, also has that installation precision is high, an assembling mistake proofing, characteristic easily.Guaranteed between crankshaft sprocket and bent axle axially, radially with assembling correctness and the required precision of angle, and the timing accuracy of timing chain and crankshaft sprocket.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is rear view of the present utility model.
Fig. 3 is the axial cut away view of the utility model.
Fig. 4 is I place enlarged view in Fig. 3.
Fig. 5 is the sectional view that locating stud coordinates with keyway.
Fig. 6 is the scheme of installation of the utility model and bent axle, sprocket wheel.
Fig. 7 is the side view of Fig. 6.
Fig. 8 is the longitudinal sectional view of Fig. 7.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail, is convenient to be well understood to the utility model, but they do not form and limit the utility model.
As shown in Figure 1, the utility model comprises sprocket body 1, described sprocket body 1 one end is the flange plate 2 for matching with bent axle, sprocket body 1 the other end is the fluted disc 3 for matching with chain, described flange plate 2 coaxially arranges with fluted disc 3, whole crankshaft sprocket be designed to integrated type powder metallurgy die cast, then carry out fine finishing manufacture.Tooth has adopted the technique of integral die-cast moulding, can reduce casting mould like this, reduces casting technique difficulty, has greatly reduced manufacturing procedure, cuts down finished cost.The front-end face of fluted disc 2 is provided with timing marks 9, and timing marks 9 can guarantee the accuracy of chain 13 and crankshaft sprocket 1 timing.
As shown in Figure 3, the axial bore 6 of described sprocket body 1 is the inner hole structure of different-diameter section, described axial bore 6 has comprised the finishing section 7 of radial location effect, and finishing section 7 both sides are for exempting from processing sections 8, and described finishing section 7 diameter d are less than exempts from processing sections 8 diameter D.Exempt from processing sections 8 for powder metallurgy casting surface, do not play a part cooperation is installed, finishing section 7 is polished surface, is used for radially installing and being used in conjunction with.When crankshaft sprocket is assemblied on bent axle 15, only having finishing section 7 is to contact and play radial location effect with bent axle 15, exempts from processing sections 8 for exempting from working surface.Can avoid like this fitting surface long and produce Over-constrained, finally cause assembling difficult problem, can also reduce amount of finish, reduce the processing cost of part.
As shown in Figure 3, Figure 4, the front-end face 4 of described fluted disc 3 is for bolt becomes pressure surface, and its edge designs is carrot-free smooth curved surface.The both sides of front-end face 4 are by arc transition, and after the fine finishing that completes front-end face, the burr of processing is the sharp corner in both sides all like this, and wedge angle both sides are cast blank face, do not affect normal use, so just removed the operation of deburring from, reduced amount of finish.
As shown in Fig. 2, Fig. 5, described flange plate 2 end faces 5 are provided with the locating stud 10 coordinating with bent axle 15 for sprocket body 1, described locating stud 10 and flange plate 2 global formations, the material of locating stud 10 and crankshaft sprocket is powder metallurgy, and the mode by die casting is integrated in locating stud on the flange plate of crankshaft sprocket.Locating stud 10 is designed to not have the direct selling shape of pattern draft, can guarantee that the keyway 16 on locating stud 10 and bent axle 15 improves the precision coordinating when assembling, locating stud 10 is positioned at the edge of flange plate 2 end faces 5, and the outer side surface 11 of locating stud 10 flushes with flange plate 2 sides.On bent axle 15, be processed with keyway 16, the both sides of keyway 16 are two parallel planes, when crankshaft sprocket is assembled on bent axle, according to the keyway 16 on locating stud 10 and bent axle 15, coordinate location.In order to improve the assembling of crankshaft sprocket and bent axle, the profile of locating stud 10 has been carried out to particular design, the inner side surface 12 that locating stud 10 contacts with keyway 16 inwalls is arc surface, when the contour shape of this locating stud can guarantee that crankshaft sprocket navigates to the keyway on bent axle by locating stud, the orientation type that the arc surface of locating stud contacts with Planar realization line on keyway.
During assembling, as shown in Fig. 6, Fig. 7, Fig. 8, by crankshaft sprocket coaxial sleeve, on bent axle 15, now the end face 5 of crankshaft sprocket upper flange plate 2 carries out axially locating by being close to end face corresponding on bent axle 15; Locating stud 10 on flange plate 2 coordinates with the keyway 16 on bent axle 15, completes angular positioning; The finishing section 7 of crankshaft sprocket coordinates with bent axle 15, plays the radially effect of assembling and positioning.After crankshaft sprocket assembles, then assemble chain 13 according to timing marks 9, chain 13 is assemblied on the tooth of crankshaft sprocket, and now the timing marks on crankshaft sprocket 9 links 14 with the timing marks of chain 13 and aligns.
The content not being described in detail in this specification belongs to the known prior art of professional and technical personnel in the field.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320678024.3U CN203547820U (en) | 2013-10-30 | 2013-10-30 | Crankshaft sprocket for engine timing chain system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320678024.3U CN203547820U (en) | 2013-10-30 | 2013-10-30 | Crankshaft sprocket for engine timing chain system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203547820U true CN203547820U (en) | 2014-04-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320678024.3U Expired - Lifetime CN203547820U (en) | 2013-10-30 | 2013-10-30 | Crankshaft sprocket for engine timing chain system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203547820U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106378594A (en) * | 2016-11-17 | 2017-02-08 | 奇精机械股份有限公司 | Preparing method for automobile chain wheel |
| CN111365444A (en) * | 2018-12-26 | 2020-07-03 | 北汽福田汽车股份有限公司 | Engine timing belt system and vehicle with same |
-
2013
- 2013-10-30 CN CN201320678024.3U patent/CN203547820U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106378594A (en) * | 2016-11-17 | 2017-02-08 | 奇精机械股份有限公司 | Preparing method for automobile chain wheel |
| CN111365444A (en) * | 2018-12-26 | 2020-07-03 | 北汽福田汽车股份有限公司 | Engine timing belt system and vehicle with same |
| CN111365444B (en) * | 2018-12-26 | 2021-11-05 | 北汽福田汽车股份有限公司 | Engine timing belt system and vehicle with same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140416 |