CN111365430A - Combined crankshaft connecting rod device - Google Patents
Combined crankshaft connecting rod device Download PDFInfo
- Publication number
- CN111365430A CN111365430A CN202010167118.9A CN202010167118A CN111365430A CN 111365430 A CN111365430 A CN 111365430A CN 202010167118 A CN202010167118 A CN 202010167118A CN 111365430 A CN111365430 A CN 111365430A
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- CN
- China
- Prior art keywords
- crank
- shaft
- pin
- connecting rod
- right crank
- 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.)
- Pending
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H21/00—Gearings comprising primarily only links or levers, with or without slides
- F16H21/10—Gearings comprising primarily only links or levers, with or without slides all movement being in, or parallel to, a single plane
- F16H21/16—Gearings comprising primarily only links or levers, with or without slides all movement being in, or parallel to, a single plane for interconverting rotary motion and reciprocating motion
- F16H21/18—Crank gearings; Eccentric gearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M1/00—Pressure lubrication
- F01M1/06—Lubricating systems characterised by the provision therein of crankshafts or connecting rods with lubricant passageways, e.g. bores
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C3/00—Shafts; Axles; Cranks; Eccentrics
- F16C3/04—Crankshafts, eccentric-shafts; Cranks, eccentrics
- F16C3/22—Cranks; Eccentrics
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C9/00—Bearings for crankshafts or connecting-rods; Attachment of connecting-rods
- F16C9/04—Connecting-rod bearings; Attachments thereof
Abstract
The invention relates to the technical field of crankshaft connecting rods, in particular to a combined crankshaft connecting rod device, which comprises a left crank, a right crank, a crank pin, a left crank shaft, a right crank shaft and a connecting rod, wherein the crank pin between the left crank and the right crank is connected with the lower end of the connecting rod, the outer side wall of the left crank is connected with the left crank shaft, and the outer side wall of the right crank is connected with the right crank shaft, and the combined crankshaft connecting rod device has the advantages that: the left crank, the right crank, the crank pin, the left crank shaft, the right crank shaft and the connecting rod are assembled, so that the crank is convenient to produce and manufacture independently, is convenient to mount, dismount and replace, and is economical; lubricating oil is filled through the outer port along the oil inlet channel, so that the lubricating oil enters along the oil inlet channel and the oil outlet channel, the lubricating oil guided out by the oil outlet channel flows to the joint of the shaft sheath and the needle roller bearing through the inner oil guide groove and the plurality of oil distributing holes, and the lubricating effect of the lubricating oil is ensured.
Description
Technical Field
The invention relates to the technical field of crankshaft connecting rods, in particular to a combined crankshaft connecting rod device.
Background
The crankshaft connecting rod assembly is one of the most typical and important parts in an engine, and has the functions of converting gas pressure transmitted by a piston connecting rod into torque, outputting the torque as power to do work, driving other working mechanisms and driving auxiliary equipment of an internal combustion engine to work.
The traditional crankshaft is of an integral structure, and has complex shape, high requirements on mechanical performance and dynamic and static balance, less machining allowance, complex machining production of the crankshaft and low production rate, so that the development of the crankshaft is restricted; when a certain part in the crankshaft communication assembly is seriously abraded, the whole crankshaft needs to be replaced, so that the cost of maintenance is increased; due to the complex structure, the lubricating operation of the connecting part of the crankshaft and the connecting rod is difficult.
Disclosure of Invention
The present invention is directed to a combined crankshaft connecting rod device to solve the above problems.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a modular crankshaft connecting rod device, includes left crank, right crank, crank pin, left crank axle, right crank axle and connecting rod, be connected with the crank pin between the corresponding eccentric position of left crank and right crank, the crank pin is connected with the lower extreme of connecting rod, and left crank's lateral wall is connected with the left crank axle of axiality, and right crank's lateral wall is connected with the right crank axle of axiality.
Preferably, the crank pin comprises a pin main shaft and a pin part integrally formed at two ends of the pin main shaft, the pin part is a rectangular shaft part, a crank pin jack matched with the pin part is arranged at the eccentric position corresponding to the left crank and the right crank, and the pin parts at two ends of the crank pin are respectively inserted into the crank pin jacks arranged on the left crank and the right crank in an interference fit manner.
Preferably, the outer walls of the cambered surfaces of the left crank and the right crank are respectively screwed with a limit screw, the lower end of the limit screw is integrally formed with a clamping end, and the clamping end penetrates through the bolt part and is inserted in the bolt part.
Preferably, the pin main shaft is connected with the lower end of the connecting rod, and a needle bearing is arranged at the joint of the pin main shaft and the connecting rod.
Preferably, an oil inlet channel with coaxiality is formed in the outer end of the plug pin part arranged at one end of the crank pin, and the inner end of the oil inlet channel is communicated with an oil outlet channel formed in the outer wall of the pin main shaft.
Preferably, the outer wall of the main shaft of the pin in the crank pin is sleeved with a shaft sheath in a matching manner, and the roller pin in the roller bearing is in rolling contact with the outer wall of the shaft sheath.
Preferably, the position of the inner wall of the shaft sheath corresponding to the oil outlet channel is provided with an annular groove-shaped inner oil guide groove, and the outer wall of the shaft sheath is provided with a plurality of oil distributing holes communicated with the inner oil guide groove.
Preferably, the left crank shaft and the right crank shaft are respectively provided with a plug rod part at one end connected with the left crank shaft and the right crank shaft, the plug rod parts are rectangular shaft parts, the centers of the left crank shaft and the right crank shaft are provided with crank shaft plug holes matched with the plug rod parts, and the plug rod parts arranged at the inner ends of the left crank shaft and the right crank shaft are respectively in interference fit with the crank shaft plug holes arranged at the middle parts of the left crank shaft and the right crank shaft.
Preferably, the end part of the inserted bar part is provided with a bolt hole, the bolt hole in the inserted bar part is in threaded connection with a limiting bolt, and the head end of the limiting bolt is embedded and clamped in the inner side walls of the left crank and the right crank.
Compared with the prior art, the invention has the beneficial effects that: the invention has reasonable structure and strong functionality, and has the following advantages:
1. the left crank, the right crank, the crank pin, the left crank shaft, the right crank shaft and the connecting rod are assembled, so that the crank is convenient to produce and manufacture independently, is convenient to mount, dismount and replace, and is economical;
2. when the joint of the connecting rod and the crank pin is lubricated, lubricating oil is filled along the outer port of the oil inlet channel, so that the lubricating oil enters along the oil inlet channel and the oil outlet channel, and the lubricating oil guided out by the oil outlet channel is distributed to the joint of the shaft sheath and the needle roller bearing through the inner oil guide groove and the plurality of oil distributing holes, so that the lubricating effect of the lubricating oil is ensured;
3. according to the invention, the shaft sheath is sleeved on the outer wall of the main shaft of the pin in the crank pin in a matching manner, and the roller pin in the roller bearing is in rolling contact with the outer wall of the shaft sheath, so that the roller pin in the roller bearing is prevented from being worn with the crank pin, and the shaft sheath is replaced after the shaft sheath is worn, so that the cost is low, and the device is economic.
Drawings
FIG. 1 is an assembled view of the structure of the present invention;
FIG. 2 is an exploded view of the structure of the present invention;
FIG. 3 is an enlarged view taken at A in FIG. 2;
FIG. 4 is a schematic view of a crank pin according to the present invention;
FIG. 5 is a schematic view of the construction of the shaft sheath of the present invention;
FIG. 6 is a front cross-sectional view of the structure of the present invention;
fig. 7 is an enlarged view at B in fig. 6.
In the figure: the crank pin structure comprises a left crank 1, a right crank 2, a crank pin 3, a left crank shaft 4, a right crank shaft 5, a connecting rod 6, a crank pin jack 7, a pin main shaft 8, a bolt part 9, a limit screw 10, a clamping end 101, a crank shaft jack 11, an inserted link part 12, a limit bolt 13, a needle bearing 14, a shaft sheath 15, an internal oil guide groove 16, an oil distribution hole 17, an oil inlet channel 18 and an oil outlet channel 19.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 7, the present invention provides a technical solution: the utility model provides a modular crankshaft connecting rod device, includes left crank 1, right crank 2, crank pin 3, left crank axle 4, right crank axle 5 and connecting rod 6, is connected with crank pin 3 between the corresponding eccentric position of left crank 1 and right crank 2, and crank pin 3 is connected with the lower extreme of connecting rod 6, and left crank 1's lateral wall is connected with the left crank axle 4 of axiality, and right crank 2's lateral wall is connected with the right crank axle 5 of axiality.
Referring to fig. 3, 4, 6 and 7, the crank pin 3 is composed of a main pin shaft 8 and pin parts 9 integrally formed at two ends of the main pin shaft 8, the eccentric positions of the left crank 1 and the right crank 2 corresponding to each other are provided with crank pin insertion holes 7 matched with the pin parts 9, the pin parts 9 at two ends of the crank pin 3 are respectively inserted into the crank pin insertion holes 7 provided on the left crank 1 and the right crank 2 in an interference fit manner, the pin parts 9 are rectangular shaft parts for preventing the crank pin 3 from twisting when being connected with the left crank 1 and the right crank 2, a limit screw 10 is screwed along the outer wall of the cambered surface of the left crank 1 and the right crank 2, the lower end of the limit screw 10 is integrally formed with a clamping end 101, and the clamping end 101 is inserted into the pin parts 9 for preventing the pin parts 9 at two ends of the crank pin 3 from falling off from the crank pin insertion holes 7 provided on the left crank 1 and the right crank 2, the connection stability of the mechanism is ensured, and the head end of the limit screw 10 is embedded into the left crank 1 and the right crank 2.
As shown in fig. 6 and 7, the pin main shaft 8 disposed in the crank pin 3 is connected to the lower end of the connecting rod 6, and the needle roller bearing 14 is disposed at the joint of the pin main shaft 8 and the connecting rod 6, so that wear of the connecting rod 6 and the crank pin 3 is reduced during operation, and the service life of the connecting rod is prolonged.
As shown in fig. 5 and 7, the outer wall of the pin spindle 8 in the crank pin 3 is sleeved with the shaft sheath 15 in a matching manner, and the needle rollers in the needle roller bearings 14 are in rolling contact with the outer wall of the shaft sheath 15, so that abrasion between the needle rollers in the needle roller bearings 14 and the crank pin 3 is avoided, and after the shaft sheath 15 is abraded, the cost for replacing the shaft sheath 15 is low, which is relatively economical, the inner wall of the shaft sheath 15 corresponding to the oil outlet channel 19 is provided with the annular groove-shaped inner oil guide groove 16, and the outer wall of the shaft sheath 15 is provided with the plurality of oil distribution holes 17 communicated with the inner oil guide groove 16, so that the lubricating oil guided out along the oil outlet channel 19 is distributed to the joint between the shaft sheath 15 and the needle roller bearings 14 through the inner oil guide groove 16 and the plurality of oil distribution.
Referring to fig. 3, 6 and 7, the left crank shaft 4, the right crank shaft 5, the left crank shaft 1 and the right crank shaft 2 are integrally formed with a rod insertion portion 12 at one end, the centers of the left crank shaft 1 and the right crank shaft 2 are provided with crank shaft insertion holes 11 matched with the rod insertion portions 12, the rod insertion portions 12 disposed at the inner ends of the left crank shaft 4 and the right crank shaft 5 are respectively in interference fit with the crank shaft insertion holes 11 disposed at the middle portions of the left crank shaft 1 and the right crank shaft 2, the rod insertion portions 12 are rectangular shaft members, the left crank shaft 1, the left crank shaft 4, the right crank shaft 2 and the right crank shaft 5 are prevented from twisting, the transmission of power is ensured, bolt holes are disposed along the end portions of the rod insertion portions 12, limit bolts 13 are screwed into the bolt holes in the rod insertion portions 12, and the head ends of the limit bolts 13 are embedded and clamped in the inner side walls of the left crank shaft 1 and the right crank shaft 2, so as to prevent the rod, The crank shaft insertion hole 11 of the right crank 2 is dropped out.
The working principle is as follows: in the invention, the bolt parts 9 at two ends of the crank pin 3 are respectively inserted into the crank pin jacks 7 arranged on the left crank 1 and the right crank 2 in an interference fit manner, the limit screws 10 screwed on the outer walls of the left crank 1 and the right crank 2 limit the bolt parts 9, the bolt parts 9 at two ends of the crank pin 3 are prevented from falling off from the crank pin jacks 7 arranged on the left crank 1 and the right crank 2, the bolt parts 12 arranged at the inner ends of the left crank shaft 4 and the right crank shaft 5 are respectively in interference fit with the crank shaft jacks 11 arranged in the middle parts of the left crank 1 and the right crank 2, and the limit bolts 13 screwed on the inner ends of the bolt parts 12 limit the bolt parts, so that the bolt parts 12 arranged at the end parts of the left crank shaft 4 and the right crank shaft 5 are prevented from falling off from the crank shaft jacks 11 arranged on the left crank 1 and the right crank; the left crank 1, the right crank 2, the crank pin 3, the left crank shaft 4, the right crank shaft 5 and the connecting rod 6 are assembled, so that the single production and manufacturing are facilitated, the installation, the disassembly and the replacement are facilitated, and the economy is realized;
when the joint of the connecting rod 6 and the crank pin 3 is lubricated, lubricating oil is filled along the outer port of the oil inlet channel 18, so that the lubricating oil enters along the oil inlet channel 18 and the oil outlet channel 19, and the lubricating oil guided out by the oil outlet channel 19 is shunted to the joint of the shaft sheath 15 and the needle bearing 14 through the inner oil guide groove 16 and the plurality of oil shunting holes 17, so that the lubricating effect of the lubricating oil is ensured;
according to the invention, the shaft sheath 15 is sleeved on the outer wall of the pin main shaft 8 in the crank pin 3 in a matching manner, and the roller pins in the roller pin bearings 14 are in rolling contact with the outer wall of the shaft sheath 15, so that abrasion between the roller pins in the roller pin bearings 14 and the crank pin 3 is avoided, and after the shaft sheath 15 is abraded, the cost for replacing the shaft sheath 15 is low, and the device is economic.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. The utility model provides a modular crankshaft connecting rod device, includes left crank (1), right crank (2), crank pin (3), left crank axle (4), right crank axle (5) and connecting rod (6), its characterized in that: be connected with crank pin (3) between the corresponding eccentric position of left crank (1) and right crank (2), crank pin (3) are connected with the lower extreme of connecting rod (6), and the lateral wall of left crank (1) is connected with left crank axle (4) of axiality, and the lateral wall of right crank (2) is connected with right crank axle (5) of axiality.
2. The modular crankshaft connecting rod assembly of claim 1, wherein: crank pin (3) comprises round pin main shaft (8) and round pin main shaft (8) both ends integrated into one piece's spigot portion (9), spigot portion (9) are rectangular shaft member spare, and left crank (1), right crank (2) corresponding eccentric position offer with spigot portion (9) match suitable crank pin jack (7), and in crank pin (3) spigot portion (9) at both ends respectively interference fit insert establish in crank pin jack (7) that left crank (1), right crank (2) seted up.
3. The modular crankshaft connecting rod assembly of claim 2, wherein: the outer walls of the cambered surfaces of the left crank (1) and the right crank (2) are respectively screwed with a limit screw (10), the lower end of the limit screw (10) is integrally formed with a clamping end (101), and the clamping end (101) penetrates through the plug pin part (9) and is inserted in the plug pin part.
4. The modular crankshaft connecting rod assembly of claim 2, wherein: the pin main shaft (8) is connected with the lower end of the connecting rod (6), and a needle bearing (14) is arranged at the joint of the pin main shaft (8) and the connecting rod (6).
5. The modular crankshaft connecting rod assembly of claim 1, wherein: the outer end of an insertion pin part (9) arranged at one end of the crank pin (3) is provided with an oil inlet channel (18) with coaxiality, and the inner end of the oil inlet channel (18) is communicated with an oil outlet channel (19) arranged along the outer wall of the pin main shaft (8).
6. The modular crankshaft connecting rod assembly of claim 1, wherein: the outer wall of a pin main shaft (8) in the crank pin (3) is sleeved with a shaft sheath (15) in a matching mode, and a roller pin in the roller bearing (14) is in rolling contact with the outer wall of the shaft sheath (15).
7. The modular crankshaft connecting rod assembly of claim 1, wherein: the inner wall of the shaft sheath (15) is provided with an annular groove-shaped inner oil guide groove (16) corresponding to the oil outlet channel (19), and the outer wall of the shaft sheath (15) is provided with a plurality of oil distributing holes (17) communicated with the inner oil guide groove (16).
8. The modular crankshaft connecting rod assembly of claim 1, wherein: the crank shaft structure is characterized in that the insertion rod parts (12) are integrally formed at one ends of the left crank shaft (4) and the right crank shaft (5) connected with the left crank shaft (1) and the right crank shaft (2), the insertion rod parts (12) are rectangular shaft parts, crank shaft insertion holes (11) matched with the insertion rod parts (12) are formed in the centers of the left crank shaft (1) and the right crank shaft (2), and the insertion rod parts (12) arranged at the inner ends of the left crank shaft (4) and the right crank shaft (5) are in interference fit with the crank shaft insertion holes (11) formed in the middles of the left crank shaft (1) and the right crank shaft (2).
9. The modular crankshaft connecting rod assembly of claim 1, wherein: bolt holes are formed in the end portion of the plug rod portion (12), a limiting bolt (13) is connected to the bolt holes in the plug rod portion (12) in a threaded mode, and the head end of the limiting bolt (13) is embedded in the inner side walls of the left crank (1) and the right crank (2) in a clamped mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010167118.9A CN111365430A (en) | 2020-03-11 | 2020-03-11 | Combined crankshaft connecting rod device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010167118.9A CN111365430A (en) | 2020-03-11 | 2020-03-11 | Combined crankshaft connecting rod device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111365430A true CN111365430A (en) | 2020-07-03 |
Family
ID=71210581
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010167118.9A Pending CN111365430A (en) | 2020-03-11 | 2020-03-11 | Combined crankshaft connecting rod device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111365430A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116379061A (en) * | 2023-02-06 | 2023-07-04 | 罡阳轴研科技(灌云)有限公司 | Assembled motorcycle crankshaft and preparation process thereof |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB231171A (en) * | 1924-03-20 | 1926-04-08 | Achille Leon Francois Wattel | Improvements in crank-shafts for engines and apparatus for the manufacture thereof |
| CN101105197A (en) * | 2007-08-09 | 2008-01-16 | 力帆实业(集团)有限公司 | Crankshaft for gasoline engine |
| CN201258073Y (en) * | 2008-07-17 | 2009-06-17 | 青岛德盛机械制造有限公司 | Crankshaft connecting rod assembly for motocycle |
| CN201714487U (en) * | 2010-06-23 | 2011-01-19 | 青岛德盛机械制造有限公司 | Motorcycle crankshaft connecting rod assembly |
| CN102926837A (en) * | 2012-11-13 | 2013-02-13 | 力帆实业(集团)股份有限公司 | Lubricating system for crank-connecting rod mechanism of high-rotation gasoline engine |
| CN106121766A (en) * | 2016-08-17 | 2016-11-16 | 力帆实业(集团)股份有限公司 | Engine for motorcycle bent axle needle roller lubrication system |
| CN207393707U (en) * | 2017-10-10 | 2018-05-22 | 重庆帅邦机械有限公司 | A kind of high stability and the crankshaft rod assembly of high life |
| CN208749799U (en) * | 2018-07-27 | 2019-04-16 | 重庆天得力工业有限公司 | Crankshaft of motorcycle assembly |
-
2020
- 2020-03-11 CN CN202010167118.9A patent/CN111365430A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB231171A (en) * | 1924-03-20 | 1926-04-08 | Achille Leon Francois Wattel | Improvements in crank-shafts for engines and apparatus for the manufacture thereof |
| CN101105197A (en) * | 2007-08-09 | 2008-01-16 | 力帆实业(集团)有限公司 | Crankshaft for gasoline engine |
| CN201258073Y (en) * | 2008-07-17 | 2009-06-17 | 青岛德盛机械制造有限公司 | Crankshaft connecting rod assembly for motocycle |
| CN201714487U (en) * | 2010-06-23 | 2011-01-19 | 青岛德盛机械制造有限公司 | Motorcycle crankshaft connecting rod assembly |
| CN102926837A (en) * | 2012-11-13 | 2013-02-13 | 力帆实业(集团)股份有限公司 | Lubricating system for crank-connecting rod mechanism of high-rotation gasoline engine |
| CN106121766A (en) * | 2016-08-17 | 2016-11-16 | 力帆实业(集团)股份有限公司 | Engine for motorcycle bent axle needle roller lubrication system |
| CN207393707U (en) * | 2017-10-10 | 2018-05-22 | 重庆帅邦机械有限公司 | A kind of high stability and the crankshaft rod assembly of high life |
| CN208749799U (en) * | 2018-07-27 | 2019-04-16 | 重庆天得力工业有限公司 | Crankshaft of motorcycle assembly |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116379061A (en) * | 2023-02-06 | 2023-07-04 | 罡阳轴研科技(灌云)有限公司 | Assembled motorcycle crankshaft and preparation process thereof |
| CN116379061B (en) * | 2023-02-06 | 2024-01-12 | 罡阳轴研科技(灌云)有限公司 | Assembled motorcycle crankshaft and preparation process thereof |
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Application publication date: 20200703 |