CN219570587U - Large-displacement motorcycle crankshaft assembly - Google Patents
Large-displacement motorcycle crankshaft assembly Download PDFInfo
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- CN219570587U CN219570587U CN202320464604.6U CN202320464604U CN219570587U CN 219570587 U CN219570587 U CN 219570587U CN 202320464604 U CN202320464604 U CN 202320464604U CN 219570587 U CN219570587 U CN 219570587U
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- crank
- crankshaft
- driving gear
- gear
- connecting holes
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Abstract
The utility model discloses a large-displacement motorcycle crankshaft assembly, which comprises a crankshaft and a driving gear part, wherein the crankshaft is detachably connected with the driving gear part, the crankshaft comprises a rod body, a large gear is arranged on the right side of the rod body, a first crank and a second crank are arranged on the left side of the rod body, a connecting rod neck is arranged between the first crank and the second crank, a plurality of crank connecting holes are formed in the second crank, the driving gear part comprises a driving gear shaft and a driving gear, a plurality of gear connecting holes are formed in the driving gear, and the gear connecting holes are connected with the crank connecting holes through a belt disc bolt. The large gear structure on the crankshaft rod body of the large-displacement motorcycle crankshaft assembly is designed to be triangular, and is integrally forged with the crankshaft and then is machined and molded, so that the overall strength is improved. In addition, the driving gear is locked on the crankshaft through adding two reel bolts, so that the torque is enhanced during operation.
Description
Technical Field
The present utility model relates to a crankshaft, and more particularly to a large displacement motorcycle crankshaft assembly.
Background
The crankshaft of large displacement motorcycle is a key part of motorcycle engine with more than 250CC displacement, its principle is the same as that of crankshaft connecting rod assembly of motorcycle, and is usually formed from crankshaft, gear and bearing, etc. the connecting rod is driven by piston to produce linear motion, then the large end of the connecting rod is used to drive crankshaft to make axial motion so as to implement a process of converting mechanical energy into kinetic energy. Compared with a small-displacement motorcycle crankshaft, the large-displacement motorcycle crankshaft has higher requirements on torsional moment and lubricating performance, and needs to be structurally improved.
Disclosure of Invention
Based on this, it is necessary to provide a large displacement motorcycle crankshaft assembly in view of the above technical problems.
In order to solve the technical problems, the utility model adopts the following technical scheme:
a large-displacement motorcycle crankshaft assembly is characterized in that the large-displacement motorcycle crankshaft assembly comprises a crankshaft and a driving gear part, the crankshaft is detachably connected with the driving gear part,
the crankshaft comprises a rod body, a large gear is arranged on the right side of the rod body, a first crank and a second crank are arranged on the left side of the rod body, a connecting rod neck is arranged between the first crank and the second crank, a plurality of crank connecting holes are arranged on the second crank, the crank connecting holes are arranged along the axial direction of the rod body,
the driving gear part is positioned at the left side of the second crank and comprises a driving gear shaft and a driving gear,
the driving gear is provided with a plurality of gear connecting holes, the gear connecting holes are arranged along the axial direction of the shaft body, the positions of the gear connecting holes are in one-to-one correspondence with the crank connecting holes, and the gear connecting holes are connected with the crank connecting holes through a belt disc bolt.
As a preferred embodiment of the utility model, the center of the driving gear is provided with a through middle hole, the center of the second crank is provided with an annular crank ring table, and the outer diameter of the crank ring table is matched with the inner diameter of the middle hole.
As a preferred embodiment of the utility model, the crank ring table is in interference fit with the middle hole.
As a preferred embodiment of the utility model, the crank connecting hole is a threaded hole penetrating through the crank connecting hole, and the gear connecting hole is a step-shaped hole.
As a preferred embodiment of the utility model, the cross section of the large gear is triangular, and the large gear and the rod body are integrally forged and then are processed and formed.
As a preferred embodiment of the utility model, a penetrating deep oil hole which is obliquely arranged is arranged between the rod body and the connecting rod neck.
Compared with the prior art, the utility model has the following beneficial effects:
the large gear structure on the crankshaft rod body of the large-displacement motorcycle crankshaft assembly is designed to be triangular, and is integrally forged with the crankshaft and then is machined and molded, so that the overall strength is improved. In addition, the driving gear is locked on the crankshaft through adding two reel bolts, so that the torque is enhanced during operation. Meanwhile, the deep oil hole is designed on the crankshaft body, so that the lubricating performance of the crankshaft is improved, and the high-performance requirement of the large-displacement motorcycle crankshaft is met.
Drawings
In order to more clearly illustrate the solution of the present utility model, a brief description will be given below of the drawings required for the description of the embodiments, it being obvious that the drawings in the following description are some embodiments of the present utility model, and that other drawings may be obtained from these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of the structure of a large displacement motorcycle crankshaft assembly of the present utility model;
FIG. 2 is a schematic view of the configuration of the drive gear portion of the large displacement motorcycle crankshaft assembly of FIG. 1;
FIG. 3 is an assembled schematic view of the crankshaft assembly of FIG. 1. At this time, the driving gear and the second crank are not connected yet;
FIG. 4 is an assembled schematic view of the crankshaft assembly of FIG. 1, with the drive gear in complete connection with the second crank;
fig. 5 is a partial schematic view of the crankshaft assembly of fig. 1, showing the location of the deep oil hole.
Description of the embodiments
The preferred embodiments of the present utility model will be described in detail below with reference to the accompanying drawings so that the advantages and features of the present utility model can be more easily understood by those skilled in the art, thereby making clear and defining the scope of the present utility model.
As shown in fig. 1 to 3, the large displacement motorcycle crankshaft assembly a includes a crankshaft 1 and a driving gear portion 2, and the crankshaft 1 is detachably connected to the driving gear portion 2.
The crankshaft 1 comprises a shaft 11, a large gear 14 is arranged on the right side of the shaft 11, a first crank 12 and a second crank 13 are arranged on the left side of the shaft 11, a connecting rod neck 15 is arranged between the first crank 12 and the second crank 13, a plurality of crank connecting holes 131 are arranged on the second crank 13, and the crank connecting holes 131 are arranged along the axial direction of the shaft 11.
The driving gear portion 2 is located at the left side of the second crank 13, and the driving gear portion 2 includes a driving gear shaft 21 and a driving gear 22.
The driving gear 22 is provided with a plurality of gear connecting holes 221, the gear connecting holes 221 are arranged along the axial direction of the shaft 11, the positions of the gear connecting holes 221 are in one-to-one correspondence with the crank connecting holes 131, and the gear connecting holes 221 are connected with the crank connecting holes 131 through a belt disc bolt 6.
The center of the driving gear 22 is provided with a through middle hole 220, the center of the second crank 13 is provided with an annular crank ring 130, and the outer diameter of the crank ring 130 is matched with the inner diameter of the middle hole 220.
A deep oil hole 16 is provided between the shaft 11 and the connecting rod neck 15, and the deep oil hole is formed so as to extend through the shaft 11 to the connecting rod neck 15.
The crank connecting hole 131 is a threaded hole penetrating therethrough, and the gear connecting hole 221 is a stepped hole.
The cross section of the large gear 14 is triangular, and the large gear 14 and the shaft 11 are integrally forged and then formed.
The following describes the manner in which the large displacement motorcycle crankshaft assembly a is assembled.
As shown in fig. 3 and 4, the middle hole 220 of the driving gear 22 is press-fitted into the crank ring 130 of the second crank 13 with interference, and then the gear connection hole 221 and the crank connection hole 131 are locked by the reel bolt 6. The reel bolts 6 are alternately locked, so that the locking force is balanced.
The large gear structure on the crankshaft rod body of the large-displacement motorcycle crankshaft assembly is designed to be triangular, and is integrally forged with the crankshaft and then is machined and molded, so that the overall strength is improved. In addition, the driving gear is locked on the crankshaft through adding two reel bolts, so that the torque is enhanced during operation. Meanwhile, the deep oil hole is designed on the crankshaft body, so that the lubricating performance of the crankshaft is improved, and the high-performance requirement of the large-displacement motorcycle crankshaft is met.
Without being limited thereto, any changes or substitutions that are not contemplated by the inventors are intended to be included within the scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the protection scope defined by the claims.
Claims (6)
1. A large-displacement motorcycle crankshaft assembly is characterized in that the large-displacement motorcycle crankshaft assembly (A) comprises a crankshaft (1) and a driving gear part (2), the crankshaft (1) is detachably connected with the driving gear part (2),
the crankshaft (1) comprises a rod body (11), a large gear (14) is arranged on the right side of the rod body (11), a first crank (12) and a second crank (13) are arranged on the left side of the rod body (11), a connecting rod neck (15) is arranged between the first crank (12) and the second crank (13), a plurality of crank connecting holes (131) are arranged on the second crank (13), the crank connecting holes (131) are arranged along the axial direction of the rod body (11),
the driving gear part (2) is positioned at the left side of the second crank (13), the driving gear part (2) comprises a driving gear shaft (21) and a driving gear (22),
the driving gear (22) is provided with a plurality of gear connecting holes (221), the gear connecting holes (221) are arranged along the axial direction of the rod body (11), the positions of the gear connecting holes (221) are in one-to-one correspondence with the crank connecting holes (131), and the gear connecting holes (221) are connected with the crank connecting holes (131) through a disc bolt (6).
2. A large displacement motorcycle crankshaft assembly as claimed in claim 1, wherein,
the center of the driving gear (22) is provided with a through middle hole (220), the center of the second crank (13) is provided with an annular crank ring table (130), and the outer diameter of the crank ring table (130) is matched with the inner diameter of the middle hole (220).
3. A large displacement motorcycle crankshaft assembly as claimed in claim 2, wherein,
the crank ring table (130) is in interference fit with the middle hole (220).
4. A large displacement motorcycle crankshaft assembly as claimed in claim 1, wherein,
the crank connecting hole (131) is a threaded hole which penetrates through the crank connecting hole, and the gear connecting hole (221) is a step-shaped hole.
5. A large displacement motorcycle crankshaft assembly as claimed in claim 1, wherein,
the cross section of the large gear (14) is triangular, and the large gear (14) and the rod body (11) are integrally forged and then are formed in a machining mode.
6. A large displacement motorcycle crankshaft assembly as claimed in claim 1, wherein,
a penetrating deep oil hole (16) which is obliquely arranged is arranged between the rod body (11) and the connecting rod neck (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320464604.6U CN219570587U (en) | 2023-03-13 | 2023-03-13 | Large-displacement motorcycle crankshaft assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320464604.6U CN219570587U (en) | 2023-03-13 | 2023-03-13 | Large-displacement motorcycle crankshaft assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219570587U true CN219570587U (en) | 2023-08-22 |
Family
ID=87669353
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320464604.6U Active CN219570587U (en) | 2023-03-13 | 2023-03-13 | Large-displacement motorcycle crankshaft assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219570587U (en) |
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2023
- 2023-03-13 CN CN202320464604.6U patent/CN219570587U/en active Active
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