CN213206475U - Crank connecting rod assembly stable in operation - Google Patents
Crank connecting rod assembly stable in operation Download PDFInfo
- Publication number
- CN213206475U CN213206475U CN202021691882.8U CN202021691882U CN213206475U CN 213206475 U CN213206475 U CN 213206475U CN 202021691882 U CN202021691882 U CN 202021691882U CN 213206475 U CN213206475 U CN 213206475U
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- crank
- connecting rod
- right crank
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- assembly
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Abstract
The utility model discloses a crank connecting rod assembly which runs stably, comprising a left crank, a right crank, a crank pin and a connecting rod, wherein the left crank and the right crank are connected through the crank pin; the method is characterized in that: the left crank and the right crank are both in non-full circle structures, one side of each of the large ends of the left crank and the right crank, which is opposite to the eccentric hole, is a balance block, the left side and the right side of the eccentric hole in the large end of the left crank are both provided with a trimming structure, the maximum outer diameter of the large end of the right crank is larger than that of the large end of the left crank, and the left side of the eccentric hole in the large end of the right crank is provided with a trimming structure. The beneficial effects of the utility model include: the crank assembly has the advantages of good stability, uniform left and right load distribution of the crank assembly, convenience in dynamic balance adjustment, good wear resistance, long service life and balanced bearing wear, thereby improving the performance of the engine.
Description
Technical Field
The utility model relates to an engine crank connecting rod assembly field, concretely relates to crank connecting rod assembly that operates steadily.
Background
The crank-connecting rod assembly is a key part on a motorcycle engine and is used for converting the linear reciprocating motion of a piston into the rotary motion of a crankshaft. During the high-speed operation of components such as the crankshaft and connecting rod assembly of the engine, the crank rotates along the axis of the crankshaft to generate large uneven centrifugal force, so that the engine generates large vibration during operation.
In order to solve the problem of large engine vibration caused by uneven centrifugal force generated by crankshaft movement, a balance shaft is generally combined with a crankshaft to eliminate the centrifugal force in the industry, so that the influence of the engine vibration on the whole motorcycle is reduced, and the driving comfort is guaranteed. In addition, different parts are required to be installed and connected on the crank assembly, so that the load distribution of the left part and the right part of the crank connecting rod assembly is uneven, the bearing on the left crank or the right crank is stressed to a large extent, the bearing abrasion is accelerated, the crank assembly is rapidly shaken abnormally, and the performance of an engine is influenced.
Disclosure of Invention
To the weak point among the above-mentioned prior art, the utility model provides a crank connecting rod assembly that operates steadily, its load symmetry and the rotational dynamic balance of having taken into account the crank connecting rod assembly left and right sides comprehensively for connecting rod assembly stationarity is good.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a crank connecting rod assembly which runs stably comprises a left crank, a right crank, a crank pin and a connecting rod, wherein the left crank and the right crank are connected through the crank pin; the method is characterized in that: the big end of left crank, right crank is the non-whole circle structure, the one side relative with the eccentric orfice on the big end of left crank, right crank is the balancing piece, wherein the balancing piece of left crank is semi-circular structure, the left and right sides and the upper end of eccentric orfice all have the edging structure on the big end of left crank, the biggest external diameter of right crank big end is greater than the biggest external diameter of left crank big end, the left side that the eccentric orfice was gone up to the right crank big end has the edging structure, just the left half has the edging structure on the balancing piece of right crank, the right side that the eccentric orfice was gone up to the right crank big end has the weight hole.
Furthermore, gaskets are arranged between the connecting rod and the contact surfaces of the large ends of the left crank and the right crank respectively.
Further, eccentric holes in the left crank and the right crank are provided with quenching layers.
Furthermore, the number of the weight holes is two, and aluminum alloy embedded blocks can be embedded in the weight holes.
The beneficial effects of the utility model include: the crank assembly has the advantages of good stability, uniform left and right load distribution of the crank assembly, convenience in dynamic balance adjustment, good wear resistance, long service life and balanced bearing wear, thereby improving the performance of the engine.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a schematic view of the big end structure of the left crank of the present invention;
fig. 3 is a schematic view of the big end structure of the middle right crank of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments and accompanying drawings.
A crank connecting rod assembly which is stable in operation and shown in figures 1-3 comprises a left crank 1, a right crank 5, a crank pin 6 and a connecting rod 2, wherein the left crank 1 and the right crank 5 are connected through the crank pin 6, the connecting rod 2 is arranged between the left crank 1 and the right crank 5, and a needle bearing 3 is sleeved between the connecting rod 2 and the crank pin 6; the method is characterized in that: the big ends of the left crank 1 and the right crank 5 are both in non-full circle structures, and the sides, opposite to the eccentric holes, of the big ends of the left crank 1 and the right crank 5 are both balance blocks and used for being parallel to the centrifugal force at the crank connecting rod. In order to realize dynamic balance of the crank connecting rod assembly during rotation, the balance block of the left crank 1 is of a semicircular structure, and the left side, the right side and the upper end of an eccentric hole in the large end of the left crank 1 are provided with chamfered edge structures; the left side of the eccentric hole on the big end of the right crank 5 is provided with a chamfered edge structure, and the upper left half part of the balance block of the right crank 5 is provided with a chamfered edge structure. And a counterweight hole 7 is formed in the right side of the eccentric hole in the large end of the right crank 5 and is used for dynamically adjusting the action balance after the crank is machined. Compromise in addition that the load distribution of two parts about the crank assembly evenly makes the bearing atress equal, the embodiment of the utility model discloses an, the biggest external diameter of right crank 5 main aspects is greater than the biggest external diameter of left crank 1 main aspects, from this right crank 5's weight is bigger than left crank 1's weight, nevertheless combines on the crank connecting rod assembly after each atress part installation is accomplished, both ends atress basic symmetry about the crank connecting rod assembly, consequently the pressure to bearing on the crank connecting rod assembly is equal basically, consequently the crank connecting rod assembly moves more steadily in the motion process.
In addition, in order to prolong the service life of the connecting rod 2 and reduce the replacement frequency, gaskets 4 are respectively arranged between the connecting rod 2 and the contact surfaces of the large ends of the left crank 1 and the right crank 5.
Eccentric holes in the left crank 1 and the right crank 5 are provided with quenching layers, uniform contact between the crank pin and the crank is guaranteed after the hole grinding process is carried out, interference is sufficient, and the service lives of the crank pin 6 and the left crank and the right crank are prolonged.
In order to adjust the dynamic balance after the assembly is completed every time conveniently, the number of the weight holes 7 is two in the implementation, materials can be removed through the weight holes 7 to adjust the balance, and aluminum alloy embedded blocks can be embedded in the weight holes 7 to adjust the dynamic balance, so that the debugging efficiency can be accelerated, the dynamic balance adjustment is simple and efficient, and the stability of the crank connecting rod assembly is better.
The technical solutions provided by the embodiments of the present invention are described in detail above, and the principles and embodiments of the present invention are explained herein by using specific examples, and the descriptions of the above embodiments are only applicable to help understand the principles of the embodiments of the present invention; meanwhile, for a person skilled in the art, according to the embodiments of the present invention, there may be variations in the specific implementation manners and application ranges, and in summary, the content of the description should not be construed as a limitation to the present invention.
Claims (4)
1. A crank connecting rod assembly capable of running stably comprises a left crank (1), a right crank (5), a crank pin (6) and a connecting rod (2), wherein the left crank (1) and the right crank (5) are connected through the crank pin (6), the connecting rod (2) is arranged between the left crank (1) and the right crank (5), and a needle bearing (3) is sleeved between the connecting rod (2) and the crank pin (6); the method is characterized in that: the main aspects of left crank (1), right crank (5) are the non-whole circle structure, the one side relative with the eccentric orfice is the balancing piece on the main aspects of left crank (1), right crank (5), wherein the balancing piece of left crank (1) is semicircular structure, the left and right sides and the upper end of eccentric orfice all have the edging structure on left crank (1) main aspects, the maximum external diameter of right crank (5) main aspects is greater than the maximum external diameter of left crank (1) main aspects, the left side of eccentric orfice has the edging structure on right crank (5) main aspects, just the left half has the edging structure on the balancing piece of right crank (5), the right side of eccentric orfice has counterweight hole (7) on right crank (5) main aspects.
2. A crank link assembly as claimed in claim 1, wherein: and gaskets (4) are arranged between the connecting rod (2) and the contact surfaces of the large ends of the left crank (1) and the right crank (5) respectively.
3. A crank link assembly as claimed in claim 1, wherein: the eccentric holes on the left crank (1) and the right crank (5) are provided with quenching layers.
4. A crank link assembly as claimed in claim 1, wherein: the number of the weight holes (7) is two, and aluminum alloy embedded blocks can be embedded in the weight holes (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021691882.8U CN213206475U (en) | 2020-08-14 | 2020-08-14 | Crank connecting rod assembly stable in operation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021691882.8U CN213206475U (en) | 2020-08-14 | 2020-08-14 | Crank connecting rod assembly stable in operation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213206475U true CN213206475U (en) | 2021-05-14 |
Family
ID=75839161
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021691882.8U Active CN213206475U (en) | 2020-08-14 | 2020-08-14 | Crank connecting rod assembly stable in operation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213206475U (en) |
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2020
- 2020-08-14 CN CN202021691882.8U patent/CN213206475U/en active Active
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