CN214465524U - Crank connecting rod mechanism for motorcycle engine - Google Patents
Crank connecting rod mechanism for motorcycle engine Download PDFInfo
- Publication number
- CN214465524U CN214465524U CN202120462290.7U CN202120462290U CN214465524U CN 214465524 U CN214465524 U CN 214465524U CN 202120462290 U CN202120462290 U CN 202120462290U CN 214465524 U CN214465524 U CN 214465524U
- Authority
- CN
- China
- Prior art keywords
- crank
- crank pin
- pin
- hole
- motorcycle engine
- 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
- 230000000903 blocking effect Effects 0.000 claims description 4
- 230000035515 penetration Effects 0.000 claims description 4
- 238000010791 quenching Methods 0.000 claims description 3
- 230000000171 quenching effect Effects 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 abstract description 7
- 238000005457 optimization Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
Images
Abstract
The utility model discloses a be used for motorcycle engine crank link mechanism, including left crank and right crank, left crank and right crank's flange end are connected with the crank pin jointly, and left crank and right crank's flange are served and are offered the mounting hole that supplies the crank pin installation, and through installation bearing cover the connecting rod is equipped with on the crank pin, is equipped with an eccentric portion on the crank pin, and the difference in height at the top of eccentric portion and crank pin longitudinal section is 2-4 mm. Through setting up the eccentric portion, increase the radial thickness of crank with crank pin complex crank hole, make in current structure, the discharge capacity of engine is the biggest under the same and the prerequisite that satisfies reliable durable line of bore, make full use of has the space now, the box changes lessly, occupation space is little, it is little not need to adjust box structure or box structure adjustment, and is with low costs, under the prerequisite that crank and crank pin slip moment satisfied, for the size increase of connecting rod major part kingpin provides the condition, the life-span of extension engine.
Description
Technical Field
The utility model relates to a motorcycle engine accessory technical field specifically is a be used for motorcycle engine crank link mechanism.
Background
Along with the increase of the displacement of the engine, the cylinder diameter and the stroke need to be increased, the radius of a crank and the outer diameter of a crank pin need to be increased, and in order to save energy and reduce emission, the engine with the large stroke cylinder diameter ratio is often adopted and the performance of medium and low speed is improved. Therefore, the needle roller bearing for the big end of the connecting rod needs to be enlarged. As a product, we all want to have a higher versatility with minimal changes to existing engines. Compared with the original state, the problem that the minimum thickness of the interference fit position of the crank pin and the crank is too small can be caused after the radius of the needle bearing, the crank pin and the crank at the big head of the connecting rod is increased.
To solve the above problems, we therefore propose a crank link mechanism for a motorcycle engine.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to overcome prior art's defect, provide one kind and be used for motorcycle engine crank link mechanism, in order to solve above-mentioned technical problem, the utility model provides a following technical scheme:
the utility model provides a be used for motorcycle engine crank link mechanism, including left crank and right crank, left crank and right crank's flange end are connected with the crank pin jointly, the mounting hole that supplies the crank pin installation is served to left crank and right crank's flange, through installing the connecting rod that bearing sleeve was equipped with between left crank and the right crank on the crank pin, be equipped with an eccentric portion on the crank pin, the difference in height at the top of eccentric portion and crank pin longitudinal section is 2-4mm, and it is located crank pin middle part position, bearing sleeve is on the eccentric portion.
As a further optimization of the technical scheme, two washers which are respectively and slidably abutted against the outer walls of the opposite sides of the left crank and the right crank are sleeved on the crank pin.
As a further optimization of the technical scheme, an oil path is arranged in the right crank, an oil storage hole in a through hole form is arranged on the crank pin, a transition passage communicated with the oil path and the oil storage hole is arranged on the outer wall of the crank pin, an oil penetration hole communicated with the oil storage hole is further arranged on the outer wall of the crank pin, and orifices at two ends of the oil storage hole are sealed by a plugging device.
As a further optimization of the technical scheme, the blocking device is a blocking wire which is screwed on the orifices at the two ends of the oil storage hole.
As a further optimization of the above technical solution, the hole wall of the mounting hole is subjected to a high frequency quenching treatment.
Compared with the prior art, the utility model discloses the beneficial effect who reaches is: through setting up the eccentric portion, increase the radial thickness of crank with crank pin complex crank hole for in current structure, the discharge capacity of engine is the biggest under the same and the prerequisite that satisfies reliable durable line of bore, make full use of current space, the box changes lessly, and occupation space is little, and it is little not need to adjust box structure or box structure adjustment, and is with low costs, under the prerequisite that crank and crank pin slip moment satisfied, provides the condition for the size increase of connecting rod major part kingpin. This helps to prolong the life of the roller pins and thus the life of the engine.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural view of a crank link mechanism for a motorcycle engine according to the present invention;
FIG. 2 is a schematic view of a three-dimensional structure of a crank pin of the present invention;
in the figure: 1-left crank, 2-thread block, 3-oil penetration hole, 4-oil storage hole, 5-needle bearing, 6-connecting rod, 7-eccentric part, 8-crank pin, 9-transition channel, 10-oil path, 11-right crank, and 12-installation space.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.
Examples
As shown in fig. 1-2, a crank link mechanism for motorcycle engine, including left crank 1 and right crank 11, have an installation space 12 between the flange end of left crank 1 and right crank 11, the flange end of left crank 1 and right crank 11 is connected with crank pin 8 jointly, crank pin 8 is located installation space 12, set up the mounting hole that supplies crank pin 8 to install on the flange end of left crank 1 and right crank 11, be equipped with connecting rod 6 that is located between left crank 1 and right crank 11 through installation bearing 5 cover on the crank pin 8, be equipped with an eccentric portion 7 on crank pin 8, the difference in height at the top of eccentric portion 7 and crank pin 8 longitudinal section is 2-4mm, and it is located crank pin 8 middle part position, bearing 5 suit is on eccentric portion 7.
In this embodiment, the crank pin 8 is sleeved with two washers which are respectively in sliding contact with the outer walls of the opposite sides of the left crank 1 and the right crank 11, so as to reduce the pressure relief.
In this embodiment, an oil passage 10 is provided in the right crank 11, an oil storage hole 4 in the form of a through hole is provided on the crank pin 8, a transition passage 9 communicating with the oil passage 10 and the oil storage hole 4 is provided on the outer wall of the crank pin 8, an oil penetration hole 3 communicating with the oil storage hole 4 is further provided on the outer wall of the crank pin 8, and the orifices at both ends of the oil storage hole 4 are sealed by plugging devices.
In this embodiment, the plugging device is a plugging wire 2 screwed to the orifices at both ends of the oil storage hole 4, and the plugging wire 2 is screwed to the orifices of the oil storage hole 4 to seal the oil storage hole 4.
In the present embodiment, the hole wall of the mounting hole is subjected to high-frequency quenching treatment to improve the fitting hardness of the mounting hole and the crank pin 8 and to improve the quality of the machined surface.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. The crank connecting rod mechanism for the motorcycle engine comprises a left crank (1) and a right crank (11), wherein flange ends of the left crank (1) and the right crank (11) are jointly connected with a crank pin (8), mounting holes for mounting the crank pin (8) are formed in the flange ends of the left crank (1) and the right crank (11), a connecting rod (6) located between the left crank (1) and the right crank (11) is sleeved on the crank pin (8) through a needle bearing (5), the crank mechanism is characterized in that an eccentric portion (7) is arranged on the crank pin (8), the height difference between the top of the longitudinal section of the eccentric portion (7) and the top of the longitudinal section of the crank pin (8) is 2-4mm, the height difference is located in the middle position of the crank pin (8), and the needle bearing (5) is sleeved on the eccentric portion (7).
2. A crank-link mechanism for a motorcycle engine according to claim 1, wherein the crank pin (8) is fitted with two washers which are slidably abutted against the outer walls of the opposite sides of the left crank (1) and the right crank (11), respectively.
3. A crank-link mechanism for a motorcycle engine according to claim 1, wherein an oil passage (10) is provided in the right crank (11), an oil storage hole (4) in the form of a through hole is provided on the crank pin (8), a transition passage (9) communicating with the oil passage (10) and the oil storage hole (4) is provided on the outer wall thereof, an oil penetration hole (3) communicating with the oil storage hole (4) is further provided on the outer wall of the crank pin (8), and the openings at both ends of the oil storage hole (4) are sealed by a plugging device.
4. A crank link mechanism for a motorcycle engine as set forth in claim 3 wherein said blocking means is a blocking wire (2) screwed to ports at both ends of the oil reservoir hole (4).
5. A crank link mechanism for a motorcycle engine as claimed in claim 1, wherein the hole wall of the mounting hole is subjected to high-frequency quenching.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120462290.7U CN214465524U (en) | 2021-03-03 | 2021-03-03 | Crank connecting rod mechanism for motorcycle engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120462290.7U CN214465524U (en) | 2021-03-03 | 2021-03-03 | Crank connecting rod mechanism for motorcycle engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214465524U true CN214465524U (en) | 2021-10-22 |
Family
ID=78152323
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120462290.7U Expired - Fee Related CN214465524U (en) | 2021-03-03 | 2021-03-03 | Crank connecting rod mechanism for motorcycle engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214465524U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116201804A (en) * | 2023-01-18 | 2023-06-02 | 罡阳轴研科技(灌云)有限公司 | Motorcycle crankshaft with impact-resistant oil hole structure and processing technology thereof |
-
2021
- 2021-03-03 CN CN202120462290.7U patent/CN214465524U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116201804A (en) * | 2023-01-18 | 2023-06-02 | 罡阳轴研科技(灌云)有限公司 | Motorcycle crankshaft with impact-resistant oil hole structure and processing technology thereof |
| CN116201804B (en) * | 2023-01-18 | 2024-01-30 | 罡阳轴研科技(灌云)有限公司 | Motorcycle crankshaft with impact-resistant oil hole structure and processing technology thereof |
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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: 20211022 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |