CN212803917U - Lightweight environment-friendly crankshaft of motorcycle - Google Patents
Lightweight environment-friendly crankshaft of motorcycle Download PDFInfo
- Publication number
- CN212803917U CN212803917U CN202021129419.4U CN202021129419U CN212803917U CN 212803917 U CN212803917 U CN 212803917U CN 202021129419 U CN202021129419 U CN 202021129419U CN 212803917 U CN212803917 U CN 212803917U
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- China
- Prior art keywords
- crank
- crank pin
- motorcycle
- crankshaft
- pin
- 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.)
- Expired - Fee Related
Links
- 239000010687 lubricating oil Substances 0.000 claims abstract description 16
- 239000003921 oil Substances 0.000 claims abstract description 11
- 230000007613 environmental effect Effects 0.000 claims abstract description 4
- 239000011148 porous material Substances 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000010705 motor oil Substances 0.000 description 1
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- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
The utility model relates to a motorcycle engine technical field especially relates to a lightweight environmental protection bent axle of motorcycle, including left crank and right crank, left crank and right crank pass through the crank pin and connect, it is equipped with connecting rod, its characterized in that through the bearing cover on the crank pin: the crank pin is characterized in that the right crank and the crank pin are integrally formed, a lubricating oil channel is radially arranged on the right crank along the rotation center line of the crank, an inclined oil channel which is directly communicated with the lubricating oil channel is formed in the middle of the crank pin on the upper side surface, a crank pin hole is formed in the left crank, the left end of the crank pin is in interference fit with the left crank pin hole so as to be connected with the left crank, at least three lightening holes are further drilled in the crank pin along the radial direction of the crank pin, and the lightening holes are arranged at equal intervals in the circumferential direction around the axis of the crank pin and. The utility model discloses processing is simple, stability is good.
Description
Technical Field
The utility model relates to a motorcycle engine technical field especially relates to a lightweight environmental protection bent axle of motorcycle.
Background
The crankshaft of motorcycle is an important moving part for realizing the working cycle and energy conversion of the engine of motorcycle. In the prior art, an existing motorcycle crankshaft generally comprises a left crank, a right crank, a connecting rod, a needle bearing and a crank pin, wherein a crank pin hole is formed in each of the left crank and the right crank, the crank pin is respectively connected with the left crank and the right crank through interference fit between two ends of the crank pin and the crank pin holes, the connecting rod is located between the left crank and the right crank, the needle bearing is arranged between the crank pin and the connecting rod, oil ducts communicated with the needle bearing are arranged in the right crank and the crank pin, and lubricating oil flows to the needle bearing through the oil ducts to lubricate the needle bearing.
In the prior art, the interference fit between the crank and the crank pin is realized through press fitting, and because the motorcycle engine is in work, a larger torque is borne between the crank of the motorcycle crankshaft connecting rod and the crank pin, when the area of the crank pressed in by the crank pin is insufficient, the friction force between the crank and the crank pin is reduced, and the requirement of the sliding torque cannot be met, thereby directly influencing the motion performance of the crank. Improvements are needed.
SUMMERY OF THE UTILITY MODEL
Therefore, to foretell problem, the utility model provides a lightweight environmental protection bent axle of motorcycle that processing is simple, stability is good.
In order to achieve the above purpose, the utility model adopts the following technical scheme: the light-weight environment-friendly crankshaft of the motorcycle comprises a left crank and a right crank, wherein the left crank and the right crank are connected through a crank pin, a connecting rod is sleeved on the crank pin through a bearing sleeve, the right crank and the crank pin are integrally formed, a lubricating oil channel is radially arranged on the right crank along a crank rotation center line, a slant oil channel which is directly communicated with the lubricating oil channel is formed in the middle of the crank pin on the upper side surface, a crank pin hole is formed in the left crank, the left end of the crank pin is in interference fit with the crank pin hole and is connected with the left crank, at least three lightening holes are further drilled in the crank pin along the radial direction of the crank pin, and the lightening holes are arranged at equal intervals along the circumferential direction around the axis of the.
In a further improvement, the pore size of the crank pin hole is gradually reduced from right to left.
The crank pin is further improved, at least one circumferential anti-skidding groove is formed in the surface of the outer circle of the left end of the crank pin, and circumferential anti-skidding convex strips matched with the circumferential anti-skidding grooves are arranged on the inner surface of the crank pin hole.
The crank pin is further improved, the outer circle surface of the left end of the crank pin is at least provided with an axial anti-slip groove on the circumferential anti-slip groove, and the inner surface of the crank pin hole is provided with an axial anti-slip convex strip matched with the axial anti-slip groove.
In a further improvement, the left crank is provided with a through hole along the radial direction of the rotation center line of the crank.
By adopting the technical scheme, the beneficial effects of the utility model are that:
1. the utility model discloses because right crank and crank pin integrated into one piece, avoided the bent axle in use the torque loss between right crank and crank pin, thereby guaranteed the moment of torsion transmission of whole bent axle in the course of the work, simultaneously, left crank and crank pin adopt integrated into one piece structure, saved the assembly process, moreover, lubricating oil duct, second lubricating oil duct and slope oil duct are all located in this integrated into one piece structure, alignment error between lubricating oil duct, second lubricating oil duct and the slope oil duct when having avoided assembling, its manufacturing is simple, the practicality is good;
2. the utility model discloses a bore on the crank pin and establish the lightening hole to make the whole quality of bent axle show and reduce, the structure is compacter, under the condition that does not influence the performance of bent axle, has reduced engine oil consumption, has improved material utilization ratio, the cost is reduced;
3. the aperture size of the crank pin hole is gradually reduced from right to left, so that the crank pin can be conveniently and quickly clamped into the crank pin hole;
4. the circumferential anti-slip grooves are matched with the circumferential anti-slip raised lines, so that the crank pin can be further prevented from being separated from the crank pin hole, and the connection stability of the crank pin is improved;
5. the axial anti-slip grooves are matched with the axial anti-slip convex strips, so that the torque loss between the left crank and the crank pin of the crankshaft in use is avoided, and the torque transmission of the whole crankshaft in the working process is further ensured;
6. through at left crank along crank rotation central line radial be provided with the through-hole, balance its and right crank's counter weight, improve the whole equilibrium of bent axle.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a schematic structural view of a left crankshaft of the embodiment of the present invention;
FIG. 3 is a schematic structural view of a right crankshaft according to an embodiment of the present invention;
fig. 4 is a schematic cross-sectional view S-S in fig. 3.
Detailed Description
The present invention will now be further described with reference to the accompanying drawings and detailed description.
Referring to fig. 1 to 3, the present embodiment provides a lightweight environment-friendly crankshaft for a motorcycle, including a left crank 1 and a right crank 2, where the left crank 1 and the right crank 2 are connected by a crank pin 3, the crank pin 3 is provided with a connecting rod 5 by a bearing sleeve 4, the right crank 2 is integrally formed with the crank pin 3, the right crank 2 is provided with a lubricating oil passage 21 along a radial direction of a crank rotation center line, the upper surface of the crank pin 3 is provided with an inclined oil passage 31 which is directly communicated with the lubricating oil passage 21, the lubricating oil passage 21 is a blind hole and has a lubricating oil inlet at an opening, the inclined oil passage 31 has an oil outlet at an opening for lubricating oil to flow out of the lubricating bearing sleeve 4 and the crank pin 5, the crank pin 3 is further drilled with three lightening holes 34 along a radial direction thereof, as shown in fig. 4, where a dotted line in the drawings is the inclined oil passage 31, the lightening holes 34 are arranged at equal intervals along a circumferential direction around an, the left crank 1 is provided with a crank pin hole 11, the diameter of the crank pin hole 11 is gradually reduced from right to left, the left end of the crank pin 1 is in interference fit with the left crank pin hole 11 to be connected with the left crank 1, and the left crank 1 is radially provided with a through hole 12 which is used for balancing the balance weight of the crank pin and the right crank 2 and improving the overall balance of the crank shaft along the rotation center line of the crank.
In this embodiment, in order to ensure the stability of the connection between the left crank 1 and the crank pin 3, a circumferential anti-slip groove 32 is formed in the outer circumferential surface of the left end of the crank pin 3, a circumferential anti-slip protruding strip 11a matched with the circumferential anti-slip groove 32 is formed in the inner surface of the crank pin hole 11, four axial anti-slip grooves 33 are formed in the circumferential anti-slip groove 32 in the outer circumferential surface of the left end of the crank pin 3, and an axial anti-slip protruding strip 11b matched with the axial anti-slip grooves 33 is formed in the inner surface of the crank pin hole 11.
It should be noted that the terms "center", "upper", "lower", "right", "left", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.
While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (5)
1. The utility model provides a lightweight environmental protection bent axle of motorcycle, includes left crank and right crank, left crank and right crank pass through the crank pin and connect, it is equipped with connecting rod, its characterized in that through the bearing cover on the crank pin: the crank pin is characterized in that the right crank and the crank pin are integrally formed, a lubricating oil channel is radially arranged on the right crank along the rotation center line of the crank, an inclined oil channel which is directly communicated with the lubricating oil channel is formed in the middle of the crank pin on the upper side surface, a crank pin hole is formed in the left crank, the left end of the crank pin is in interference fit with the left crank pin hole so as to be connected with the left crank, at least three lightening holes are further drilled in the crank pin along the radial direction of the crank pin, and the lightening holes are arranged at equal intervals in the circumferential direction around the axis of the crank pin and.
2. A lightweight environmentally friendly crankshaft for a motorcycle as set forth in claim 1, wherein: the pore size of the crank pin hole is gradually reduced from right to left.
3. A lightweight environmentally friendly crankshaft for a motorcycle as set forth in claim 2, wherein: the crank pin is characterized in that at least one circumferential anti-slip groove is formed in the surface of the outer circle of the left end of the crank pin, and a circumferential anti-slip convex strip matched with the circumferential anti-slip groove is arranged on the inner surface of the crank pin hole.
4. A lightweight environmentally friendly crankshaft for a motorcycle as set forth in claim 3, wherein: the outer circle surface of the left end of the crank pin is at least provided with an axial anti-slip groove on the circumferential anti-slip groove, and the inner surface of the crank pin hole is provided with an axial anti-slip convex strip matched with the axial anti-slip groove.
5. A lightweight environmentally friendly crankshaft for a motorcycle as claimed in any one of claims 1 to 4, wherein: the left crank is provided with a through hole along the radial direction of the rotation center line of the crank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021129419.4U CN212803917U (en) | 2020-06-17 | 2020-06-17 | Lightweight environment-friendly crankshaft of motorcycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021129419.4U CN212803917U (en) | 2020-06-17 | 2020-06-17 | Lightweight environment-friendly crankshaft of motorcycle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212803917U true CN212803917U (en) | 2021-03-26 |
Family
ID=75097064
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021129419.4U Expired - Fee Related CN212803917U (en) | 2020-06-17 | 2020-06-17 | Lightweight environment-friendly crankshaft of motorcycle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212803917U (en) |
-
2020
- 2020-06-17 CN CN202021129419.4U patent/CN212803917U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210326 |