CN215673132U - Weight-reducing crankshaft with large and small fan handle structures - Google Patents
Weight-reducing crankshaft with large and small fan handle structures Download PDFInfo
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- CN215673132U CN215673132U CN202122369571.0U CN202122369571U CN215673132U CN 215673132 U CN215673132 U CN 215673132U CN 202122369571 U CN202122369571 U CN 202122369571U CN 215673132 U CN215673132 U CN 215673132U
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Abstract
The utility model discloses a weight-reducing crankshaft with a large fan handle structure and a small fan handle structure, which comprises a main journal, a crank assembly and a connecting rod journal, wherein the crank assembly comprises a plurality of pairs of large fan handles and small fan handles which are fixedly connected through the connecting rod journal, crank arms of the large fan handles are symmetrically extended outwards from left to right to form a fan-shaped structure which does not exceed the maximum motion profile of the connecting rod, and crank shafts of the small fan handles are symmetrically retracted inwards from left to right to form the fan-shaped structure. The utility model discloses a weight-reducing crankshaft with a large and small fan handle structure.
Description
Technical Field
The utility model relates to the technical field of engine parts, in particular to a weight-reducing crankshaft with a large fan handle and a small fan handle.
Background
The crankshaft is the main rotating part of the engine, and after the connecting rod is installed, the crankshaft can bear the up-and-down (reciprocating) motion of the connecting rod to be changed into a circulating (rotating) motion. The engine is an important part on an engine, the material of the engine is made of carbon structural steel or nodular cast iron, and the engine has two important parts: main journals, connecting journals, (among others). The main journal is mounted on the cylinder body, the connecting rod journal is connected with the connecting rod big end hole, and the connecting rod small end hole is connected with the cylinder piston, and the crank block mechanism is typical. The lubrication of the crankshaft mainly refers to the lubrication between the bearing bush and the connecting rod neck of the connecting rod big end and the lubrication between the fixing points at two ends, and the rotation of the crankshaft is a power source of an engine. And is also the source power of the whole mechanical system.
The connecting rod is mounted on a connecting rod journal of the crankshaft, and the connecting rod journal is spaced from the center of the main journal by a certain distance. Because the two journals are not concentric, when the crankshaft rotates, the inertial mass of the piston and connecting rod unbalance the crankshaft, creating a large unbalance force (centrifugal force) that acts on the main journal, increasing the load. In order to eliminate the unbalance, a balance weight is required to be arranged on the crankshaft, and the mass size, the shape and the installation position of the balance weight need to be reasonably designed so as to overcome the centrifugal force generated in the rotation of the crankshaft and reduce the load of the main journal. The balance rate requirement of a general crank connecting rod mechanism is more than or equal to 80 percent, the balance rate requirement is difficult to achieve by the conventional crank connecting rod mechanism, and the requirement of light weight is difficult to meet even if the balance rate requirement is achieved through the deformation of some structures, so that the whole crank connecting rod mechanism is large in size and large in mass.
Therefore, in order to solve the above problems, a weight-reduced crankshaft with a large and small fan handle structure is needed, which can meet the requirement of balance rate and reduce the weight of the fan handle, the radius of the outer fan handle does not exceed the maximum motion profile of the connecting rod, the balance rate is supplemented by the small inner fan handle, and the lightweight of the cylinder body rotation cavity, the light weight of the crankshaft and the like are realized.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention aims to overcome the defects in the prior art, and provide a weight-reduced crankshaft with a large and small fan handle structure, which can meet the requirement of balance rate and reduce the weight of the fan handle, the radius of the outer fan handle does not exceed the maximum motion profile of the connecting rod, the requirement of the balance rate supplement of the small inner fan handle is met, and the lightweight of the cylinder body rotation cavity, the lightweight of the crankshaft and the like is realized.
The weight-reducing crankshaft with the large fan handle structure and the small fan handle structure comprises a main journal, a crank assembly and a connecting rod journal, wherein the crank assembly comprises a plurality of pairs of large fan handles and small fan handles which are fixedly connected through the connecting rod journal, crank arms of the large fan handles extend outwards in the left-right direction symmetrically to form a fan-shaped structure which does not exceed the maximum motion profile of the connecting rod, and crank shafts of the small fan handles retract inwards in the left-right direction symmetrically to form the fan-shaped structure.
Further, the crank assembly comprises four fan handle groups which are respectively a first big fan handle, a first small fan handle, a second big fan handle, a second small fan handle, a third big fan handle, a third small fan handle, a fourth big fan handle and a fourth small fan handle, the fan handles are arranged in sequence along the extension direction of the main journal, the first big fan handle, the first small fan handle, the second big fan handle, the third small fan handle, the fourth small fan handle and the fourth big fan handle are arranged on the main journal, the first big fan handle and the fourth big fan handle are symmetrical, the first small fan handle and the fourth small fan handle are symmetrical, the second small fan handle and the third small fan handle are symmetrical, the second big fan handle and the third big fan handle are symmetrical, the big fan handle is used for achieving larger rotation inertia when in work to reduce the integral mass of the crank, the small fan handles are matched to achieve the design requirement of balance rate, and avoid the requirement that a single-side crank shaft does not meet the balance rate requirement, the size of the rotary cavity of the cylinder body is reduced, the size of the engine is further reduced, the compactness is better, the high balance rate and the whole light weight can be realized by matching the large fan handle and the small fan handle, and the material cost is reduced.
Furthermore, the main journals are separated by four groups of fan handles to form a main journal first section, a main journal second section, a main journal third section, a main journal fourth section and a main journal fifth section, and each fan handle group is arranged on the main journals at intervals.
Further, the connecting rod neck comprises a first connecting rod neck connecting the first big fan handle and the first small fan handle, a second connecting rod neck connecting the second big fan handle and the second small fan handle, a third connecting rod neck connecting the third big fan handle and the third small fan handle, and a fourth connecting rod neck connecting the fourth big fan handle and the fourth small fan handle.
Furthermore, a first oil hole convenient for lubricating oil circulation is obliquely arranged along one section of the main journal, a crank arm of the first big fan handle and the first connecting rod journal; a second oil hole convenient for lubricating oil circulation is obliquely arranged along the two sections of the main journal, the crank arm of the second small fan handle and the second connecting rod neck; a third oil hole convenient for lubricating oil circulation is obliquely arranged along the three sections of the main journal, the crank arm of the third big fan handle and the third connecting rod journal; and a fourth oil hole convenient for lubricating oil circulation is obliquely arranged along the four sections of the main journal, the crank arm of the fourth small fan handle and the fourth connecting rod journal.
Furthermore, the transition round corners at the joint of the main journal and the fan handle and the joint of the connecting rod journal and the fan handle are subjected to rolling treatment.
Furthermore, the crank arms of the large fan handle and the small fan handle are arranged at the connecting part of the crank arms and the connecting rod neck in a thickness reducing mode, the overall mass of the crankshaft is reduced, the light design requirement is met, and the volume of a rotary cavity of the cylinder body is reduced.
The beneficial effects of utility model are that: the utility model discloses a weight-reducing crankshaft with a large and small fan handle structure.
Drawings
The utility model is further described below with reference to the following figures and examples:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic cross-sectional view A-A of FIG. 1;
FIG. 3 is a schematic cross-sectional view of B-B of FIG. 1;
FIG. 4 is a schematic cross-sectional view of C-C of FIG. 1;
FIG. 5 is a schematic cross-sectional view of D-D of FIG. 1;
fig. 6 is a schematic cross-sectional view of J-J in fig. 3.
Detailed Description
Fig. 1 is a schematic structural diagram of the present invention, fig. 2 is a schematic structural diagram of a cross section a-a in fig. 1, fig. 3 is a schematic structural diagram of a cross section B-B in fig. 1, fig. 4 is a schematic structural diagram of a cross section C-C in fig. 1, fig. 5 is a schematic structural diagram of a cross section D-D in fig. 1, and fig. 6 is a schematic structural diagram of a cross section J-J in fig. 3.
In this embodiment, the crank assembly includes four fan handle sets, namely a first large fan handle 3a, a first small fan handle 3b, a second large fan handle 4a, a second small fan handle 4b, a third large fan handle 5a, a third small fan handle 5b, a fourth large fan handle 6a, and a fourth small fan handle 6b, the arrangement order of the fan handles along the extension direction of the main journal is the first large fan handle 3a, the first small fan handle 3b, the second small fan handle 4b, the second large fan handle 4a, the third large fan handle 5a, the third small fan handle 5b, the fourth small fan handle 6b, and the fourth large fan handle 6a, the first large fan handle 3a and the fourth large fan handle 6a are symmetrical on the main journal, the first small fan handle 3b and the fourth small handle 6b are symmetrical, the second small handle 4b and the third small handle 5b are symmetrical, the second large handle 4a and the fourth large handle 5a are symmetrical, and the inertia is used for rotation, the mass of the whole crank is reduced, the small fan handle is matched to meet the design requirement of the balance rate, the condition that a single-side crank crankshaft does not meet the requirement of the balance rate is avoided, the size of a cylinder body rotation cavity is reduced, the size of an engine is further reduced, the compactness is better, the high balance rate and the whole light weight can be realized through the matching of the large fan handle and the small fan handle, and the material cost is reduced.
In this embodiment, four fan handle sets separate the main journal to form a main journal first section 1a, a main journal second section 1b, a main journal third section 1c, a main journal fourth section 1d and a main journal fifth section 1e, and each fan handle set is disposed on the main journal in a spaced manner.
In this embodiment, the connecting rod necks include a first connecting rod neck 2a connecting the first large handle 3a and the first small handle 3b, a second connecting rod neck 2b connecting the second large handle 4a and the second small handle 4b, a third connecting rod neck 2c connecting the third large handle 5a and the third small handle 5b, and a fourth connecting rod neck 2d connecting the fourth large handle 6a and the fourth small handle 6 b.
In this embodiment, a first oil hole 7a for facilitating circulation of lubricating oil is obliquely arranged along the section 1a of the main journal, the crank arm of the first large handle 3a and the first connecting rod journal 2 a; a second oil hole 7b convenient for lubricating oil circulation is obliquely arranged along the main journal two section 1b, the crank arm of the second small crank 4b and the second connecting rod journal 2 b; a third oil hole 7c convenient for lubricating oil to circulate is obliquely arranged along the three main journal sections 1c, the crank arm of the third big crank handle 5a and the third connecting rod journal 2 c; a fourth oil hole 7d for facilitating circulation of lubricating oil is obliquely formed along the four sections 1d of the main journal, the crank arm of the fourth small crank 6b and the fourth connecting journal 2 d.
In this embodiment, the transition round corners at the joint of the main journal and the fan handle and the joint of the connecting rod journal and the fan handle are processed by rolling.
In this embodiment, the crank arms of the big fan handle and the small fan handle are arranged at the connecting position with the connecting rod neck in a thickness reducing manner, so that the overall mass of the crankshaft is reduced, the design requirement of light weight is met, and the volume of the rotary cavity of the cylinder body is reduced.
The utility model discloses a weight-reducing crankshaft with a large and small fan handle structure.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (7)
1. The utility model provides a be equipped with heavy bent axle that subtracts of big small fan handle structure which characterized in that: the crank assembly comprises a plurality of pairs of large fan handles and small fan handles which are fixedly connected through the connecting rod necks, crank arms of the large fan handles extend outwards from left to right symmetrically to form a fan-shaped structure which does not exceed the maximum motion profile of the connecting rod, and crank shafts of the small fan handles retract inwards from left to right symmetrically to form the fan-shaped structure.
2. The weight-reduced crankshaft with a large and small fan-handle structure as set forth in claim 1, wherein: the crank assembly comprises four fan handle groups, namely a first big fan handle, a first small fan handle, a second big fan handle, a second small fan handle, a third big fan handle, a third small fan handle, a fourth big fan handle and a fourth small fan handle, wherein the fan handles are sequentially arranged along the extension direction of the main journal and sequentially comprise the first big fan handle, the first small fan handle, the second big fan handle, the third small fan handle, the fourth small fan handle and the fourth big fan handle.
3. The weight-reduced crankshaft with the large and small fan-handle structure as set forth in claim 2, wherein: the four groups of fan handles separate the main journals to form a main journal first section, a main journal second section, a main journal third section, a main journal fourth section and a main journal fifth section.
4. The weight-reduced crankshaft with a large and small fan-handle structure as set forth in claim 3, wherein: the connecting rod neck comprises a first connecting rod neck connected with the first big fan handle and the first small fan handle, a second connecting rod neck connected with the second big fan handle and the second small fan handle, a third connecting rod neck connected with the third big fan handle and the third small fan handle, and a fourth connecting rod neck connected with the fourth big fan handle and the fourth small fan handle.
5. The weight-reduced crankshaft with a large and small fan-handle structure as set forth in claim 4, wherein: a first oil hole convenient for lubricating oil circulation is obliquely arranged along one section of the main journal, the crank arm of the first big fan handle and the first connecting rod journal; a second oil hole convenient for lubricating oil circulation is obliquely arranged along the two sections of the main journal, the crank arm of the second small fan handle and the second connecting rod neck; a third oil hole convenient for lubricating oil circulation is obliquely arranged along the three sections of the main journal, the crank arm of the third big fan handle and the third connecting rod journal; and a fourth oil hole convenient for lubricating oil circulation is obliquely arranged along the four sections of the main journal, the crank arm of the fourth small fan handle and the fourth connecting rod journal.
6. The weight-reduced crankshaft with the large and small fan-handle structure as set forth in claim 2, wherein: and the transition round corners at the joint of the main journal and the fan handle and the joint of the connecting rod journal and the fan handle are subjected to rolling treatment.
7. The weight-reduced crankshaft with a large and small fan-handle structure as set forth in claim 1, wherein: the crank arms of the big fan handle and the small fan handle are arranged at the connecting part of the connecting rod neck in a thickness reducing way.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122369571.0U CN215673132U (en) | 2021-09-27 | 2021-09-27 | Weight-reducing crankshaft with large and small fan handle structures |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122369571.0U CN215673132U (en) | 2021-09-27 | 2021-09-27 | Weight-reducing crankshaft with large and small fan handle structures |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215673132U true CN215673132U (en) | 2022-01-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122369571.0U Active CN215673132U (en) | 2021-09-27 | 2021-09-27 | Weight-reducing crankshaft with large and small fan handle structures |
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| CN (1) | CN215673132U (en) |
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2021
- 2021-09-27 CN CN202122369571.0U patent/CN215673132U/en active Active
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Address after: No. 7, Wuyun Lake Road, Shapingba District, Chongqing 400038 Patentee after: Celes Group Co.,Ltd. Address before: 400033 Jinqiao Road, Shapingba District, Chongqing City, No. 61-1 Patentee before: CHONGQING SOKON INDUSTRY GROUP Co.,Ltd. |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230801 Address after: 401220 Mechanical and Electrical Materials Park, Yanjia Industrial Park, Changshou District, Chongqing Patentee after: Chongqing Xiaokang Power Co.,Ltd. Address before: No. 7, Wuyun Lake Road, Shapingba District, Chongqing 400038 Patentee before: Celes Group Co.,Ltd. |