CN201531515U - Crankshaft with multi-curved-surface combined transition - Google Patents
Crankshaft with multi-curved-surface combined transition Download PDFInfo
- Publication number
- CN201531515U CN201531515U CN2009201413970U CN200920141397U CN201531515U CN 201531515 U CN201531515 U CN 201531515U CN 2009201413970 U CN2009201413970 U CN 2009201413970U CN 200920141397 U CN200920141397 U CN 200920141397U CN 201531515 U CN201531515 U CN 201531515U
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- arc
- transition zone
- transition
- connecting rod
- crank
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Abstract
A crankshaft with multi-curved-surface combined transition comprises a main journal, a connecting rod journal and a crank used for connecting the main journal with the connecting rod journal. Joints between the main journal and the crank and between the connecting rod journal and the crank are provided with a first transitional band, a second transitional band and a skew line section, surface section of each transitional band comprises at least two line segment combinations with different curvatures, and each line segment is tangent with each other. By aid of the design, connection between the connecting rod journal and the crank is smoother, inner stress caused by processing and rolling can be released more effectively, thereby avoiding fatigue of the crankshaft when being stressed with alternating stress and then prolonging service life of the crankshaft.
Description
Technical field
The utility model relates to motor, particularly transition structure design between engine crankshaft crank and connecting rod neck and the main journal.
Background technique
Bent axle is one of part of most critical in the motor, because bent axle is bearing pressure of explosion, reciprocal inertia force and centrifugal inertia force, the carrying situation is very complicated, and the bending distortion is serious, therefore exists the situation that stress is concentrated at crank wall and axle journal joint.The mode of general employing roll extrusion fillet eliminates stress concentrated, guarantees the structural strength of bent axle.
The connecting rod neck place of existing bent axle all is the transient mode that adopts a single fillet, after the fillet rolling of bent axle, has influence on the release of roll extrusion place internal stress.When engine operation, bent axle produces and reverses and bending deflection, and stressing conditions is very complicated, and the connecting rod neck is a link weak in the whole bent axle, therefore the internal stress at the roll extrusion fillet place of connecting rod neck can not well be discharged, and finally can have influence on the life-span of bent axle.
Summary of the invention
The utility model provides a kind of bent axle with many curved surface combination transition, by the structural design at rational crankshaft rolling fillet place, maximized release roll extrusion fillet place, solve the not enough technical problem of roll extrusion fillet position internal stress release in the prior art.Adopt the method that seamlessly transits in each junction, solve the technical problem that stress is concentrated, further improve the technical solution of the utility model.
The utility model for the technological scheme that provides is provided is, design a kind of bent axle with many curved surface combination transition, comprise main journal, connecting rod neck and the crank that connects both, described connecting rod neck and crank joint have first transition zone, described first transition zone surface section configuration comprises the line segment combination of at least two sections different curvature, tangent mutually between each line segment, described first transition zone and connecting rod neck, first transition zone and crank junction are rounding off.
Further improvement of the utility model is: described main journal and crank joint have second transition zone, described second transition zone surface section configuration comprises the line segment combination of at least two sections different curvature, tangent mutually between each line segment, described second transition zone and main journal, second transition zone and crank junction are rounding off.
Of the present utility model further the improvement again is: the annular groove of described first transition zone for being recessed into to axis direction by connecting rod neck outer round surface.
Of the present utility model further the improvement is: the annular groove of described second transition zone for being recessed into to axis direction by the main journal outer round surface.
Of the present utility model further the improvement is: the surperficial section configuration of described first transition zone and second transition zone includes first arc and second arc of different curvature, and described first arc and the second arc joint are tangent mutually.
Of the present utility model further the improvement is: the surperficial section configuration of described first transition zone and second transition zone includes first arc and skew lines section, in first arc and skew lines section junction, and tangent first arc of skew lines section.
Of the present utility model further the improvement is: the surperficial section configuration of described first transition zone and second transition zone also comprises the skew lines section, described skew lines section connects first arc or second arc, at first arc or second arc and skew lines section junction, tangent first arc of skew lines section or second arc.
Design of the present utility model, can make the connecting rod neck round suitable more with the connection between the crank, this structure can more effectively discharge because the internal stress that processing and roll extrusion cause, avoid bent axle being subjected under the situation of alternating stress, cause the fatigue ruption of bent axle herein, thereby prolonged the working life of bent axle.
Description of drawings
Fig. 1 is the schematic representation at the utility model crankshaft rolling fillet position.
Number in the figure is: 1, connecting rod neck; 2, skew lines section; 3, first arc; 4, second arc; 5, crankweb; 6 main journals.
Embodiment
In conjunction with above-mentioned description of drawings specific embodiment of the utility model.
By among Fig. 1 as can be known, a kind of bent axle with many curved surface combination transition, comprise main journal, connecting rod neck and the crank that connects both, described connecting rod neck and crank joint have first transition zone, described first transition zone surface section configuration comprises the line segment combination of at least two sections different curvature, tangent mutually between each line segment, described first transition zone and connecting rod neck, first transition zone and crank junction are rounding off.Described main journal and crank joint have second transition zone, described second transition zone surface section configuration comprises the line segment combination of at least two sections different curvature, tangent mutually between each line segment, described second transition zone and main journal, second transition zone and crank junction are rounding off.In the utility model single round-corner transition of the prior art is changed into the mode of many curved surface combination transition, make changeover portion and journal surface and the transition of crank junction more smooth-going, avoid the junction that single round-corner transition causes in the prior art too lofty, the changeover portion fillet radius is too small, internal stress is difficult for release and the concentrated problem of stress ratio, can make the connecting rod neck round suitable more with the connection between the crank, avoid bent axle being subjected under the situation of alternating stress, fatigue ruption at the rod journal place, thereby prolonged the working life of bent axle, improved the Security and the durability of motor.
Described first transition zone and second transition zone are the annular groove that is recessed into to axis direction by connecting rod neck and main journal outer round surface.
The surperficial section configuration of transition zone can adopt following several scheme in the utility model:
1. the surperficial section configuration of described first transition zone and second transition zone includes first arc and second arc of different curvature, and described first arc and the second arc joint are tangent mutually, and this programme is the combination of simple camber line and camber line.
2. the surperficial section configuration of described first transition zone and second transition zone includes first arc and skew lines section, in first arc and skew lines section junction, and tangent first arc of skew lines section, this programme is the combination of camber line and straight line.
3. the surperficial section configuration of described first transition zone and second transition zone also comprises the skew lines section, described skew lines section connects first arc or second arc, in first arc or second arc and skew lines section junction, tangent first arc of skew lines section or second arc, this programme be camber line and camber line again with the combination of straight line.
Optimization design scheme of the present utility model is: the angle between described skew lines section and main journal or the connecting rod neck axis is between 35 °～60 °, the radius of described first arc is between 0.3～1 millimeter, and the radius of described second arc is between 1～2 millimeter.
For further understanding summary of the invention of the present utility model, characteristics and effect, exemplify following examples, and conjunction with figs. is described in detail as follows:
As shown in Figure 1, this is the new type crank roll extrusion fillet design on certain small displacement engine bent axle, this bent axle adopts casting iron craft, for the full integral one-piece crankshaft that supports, supports by five main journals, adopt eight equilibrium blocks, thick 14mm～the 18mm of equilibrium block, main journal diameter are 45mm～55mm, and length is 21mm～26mm, the diameter of connecting rod neck is 35mm～45mm, and length is 20mm～25mm.Fillet on this bent axle adopts novel design and processing mode.The connecting rod neck 1 of this bent axle and the connection between the crankweb 5 are the fillets that adopts skew lines section 2, first arc 3 and second arc, 4 tangent formation smooth transition, the angular range of skew lines section 2 is that 35 degree are between 60 degree, the radius of first arc 3 is between 0.3 millimeter to 1 millimeter, the radius of second arc 4 is between 1 millimeter to 2 millimeters, can make like this can be slicker and more sly between connecting rod neck 1 and the crankweb 5 connection.This structure is to be processed by a profile cutting tool in course of working, can be good at guaranteeing the required precision of size.
Above content be in conjunction with concrete preferred implementation to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (10)
1. one kind has the bent axle that many curved surfaces make up transition, comprise main journal, connecting rod neck and the crank that connects both, described connecting rod neck and crank joint have first transition zone, it is characterized in that: described first transition zone surface section configuration comprises the line segment combination of at least two sections different curvature, tangent mutually between each line segment, described first transition zone and connecting rod neck, first transition zone and crank junction are rounding off.
2. according to the described bent axle of claim 1 with many curved surface combination transition, it is characterized in that: described main journal and crank joint have second transition zone, described second transition zone surface section configuration comprises the line segment combination of at least two sections different curvature, tangent mutually between each line segment, described second transition zone and main journal, second transition zone and crank junction are rounding off.
3. according to claim 1 or 2 described bent axles, it is characterized in that: the annular groove of described first transition zone for being recessed into to axis direction by connecting rod neck outer round surface with many curved surface combination transition.
4. according to the described bent axle of claim 2, it is characterized in that: the annular groove of described second transition zone for being recessed into to axis direction by the main journal outer round surface with many curved surface combination transition.
5. according to the described bent axle of claim 2 with many curved surface combination transition, it is characterized in that: the surperficial section configuration of described first transition zone and second transition zone includes first arc and second arc of different curvature, and described first arc and the second arc joint are tangent mutually.
6. according to the described bent axle of claim 2 with many curved surface combination transition, it is characterized in that: the surperficial section configuration of described first transition zone and second transition zone includes first arc and skew lines section, in first arc and skew lines section junction, tangent first arc of skew lines section.
7. according to the described bent axle of claim 5 with many curved surface combination transition, it is characterized in that: the surperficial section configuration of described first transition zone and second transition zone also comprises the skew lines section, described skew lines section connects first arc or second arc, at first arc or second arc and skew lines section junction, tangent first arc of skew lines section or second arc.
8. according to claim 6 or 7 described bent axles with many curved surface combination transition, it is characterized in that: the angle between described skew lines section and main journal or the connecting rod neck axis is between 35 °～60 °.
9. according to claim 5 or 6 described bent axles with many curved surface combination transition, its feature exists
In: the radius of described first arc is between 0.3～1 millimeter.
10. according to the described bent axle of claim 5, it is characterized in that with many curved surface combination transition:
The radius of described second arc is between 1～2 millimeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201413970U CN201531515U (en) | 2009-09-29 | 2009-09-29 | Crankshaft with multi-curved-surface combined transition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201413970U CN201531515U (en) | 2009-09-29 | 2009-09-29 | Crankshaft with multi-curved-surface combined transition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201531515U true CN201531515U (en) | 2010-07-21 |
Family
ID=42526919
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201413970U Expired - Lifetime CN201531515U (en) | 2009-09-29 | 2009-09-29 | Crankshaft with multi-curved-surface combined transition |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201531515U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105798558A (en) * | 2014-12-29 | 2016-07-27 | 上汽通用五菱汽车股份有限公司 | Small-displacement internal combustion engine crankshaft preparation method |
-
2009
- 2009-09-29 CN CN2009201413970U patent/CN201531515U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105798558A (en) * | 2014-12-29 | 2016-07-27 | 上汽通用五菱汽车股份有限公司 | Small-displacement internal combustion engine crankshaft preparation method |
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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: 20100721 |