CN112832920A - Engine crankcase and manufacturing method thereof - Google Patents

Engine crankcase and manufacturing method thereof Download PDF

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Publication number
CN112832920A
CN112832920A CN202011624772.4A CN202011624772A CN112832920A CN 112832920 A CN112832920 A CN 112832920A CN 202011624772 A CN202011624772 A CN 202011624772A CN 112832920 A CN112832920 A CN 112832920A
Authority
CN
China
Prior art keywords
split
engine crankcase
split body
positioning
bodies
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.)
Withdrawn
Application number
CN202011624772.4A
Other languages
Chinese (zh)
Inventor
陈志勇
张淑坤
张亚志
朱长钦
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang CFMOTO Power Co Ltd
Original Assignee
Zhejiang CFMOTO Power Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Zhejiang CFMOTO Power Co Ltd filed Critical Zhejiang CFMOTO Power Co Ltd
Priority to CN202011624772.4A priority Critical patent/CN112832920A/en
Publication of CN112832920A publication Critical patent/CN112832920A/en
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F7/00—Casings, e.g. crankcases or frames
    • F02F7/0043—Arrangements of mechanical drive elements
    • F02F7/0058—Longitudinally or transversely separable crankcases
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
    • B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
    • B23Q3/06—Work-clamping means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F7/00—Casings, e.g. crankcases or frames
    • F02F7/0095—Constructing engine casings

Abstract

The invention discloses an engine crankcase, which is used for a motorcycle and comprises a first split body and a second split body; the second sub-body is detachably and fixedly connected with the first sub-body; wherein, the first sub-body and the second sub-body are provided with positioning structures which are matched with each other. In the engine crankcase, the first split body and the second split body are provided with the positioning structures which are matched with each other, so that the two split bodies are accurately positioned during assembling, and the problem of poor shaft hole restoration degree or poor shaft hole coaxiality after assembling is prevented. The invention also provides a manufacturing method of the engine crankcase, which ensures accurate installation of all parts of the motorcycle engine.

Description

Engine crankcase and manufacturing method thereof
Technical Field
The invention relates to the technical field of motorcycles, in particular to an engine crankcase and a manufacturing method of the engine crankcase.
Background
When the motorcycle engine is manufactured, the split crankcase needs to be subjected to mould assembling processing, and then the procedures of cleaning, measuring, mould assembling and the like are carried out.
However, for the upper and lower split crankcase bodies, the upper and lower split bodies surround the shaft hole, and the upper and lower split bodies are directly assembled when the crankcase is assembled, so that the problem of poor restoration of the shaft hole due to dislocation of the upper and lower split bodies often occurs. For the left and right split type crankcase, the left split body and the right split body are respectively provided with a shaft hole, when the left and right split bodies are assembled, the left and right split bodies are directly spliced and assembled, and the problem that the coaxiality of the shaft holes on the two split bodies is poor due to the fact that the left and right split bodies are staggered frequently occurs.
In conclusion, how to avoid the problem that the shaft hole restoration degree is not good or the shaft hole coaxiality is not good when the split crankcase is assembled is a problem to be solved urgently by the technical personnel in the field.
Disclosure of Invention
In view of the above, the present invention provides an engine crankcase, which can prevent the problems of poor shaft hole restoration degree or poor shaft hole coaxiality after assembling. The invention also provides a manufacturing method of the motorcycle engine, which ensures accurate installation of each part of the motorcycle engine.
In order to achieve the purpose, the invention provides the following technical scheme:
an engine crankcase for a motorcycle, comprising:
a first split body;
the second split body is detachably and fixedly connected with the first split body;
and the first split body and the second split body are provided with positioning structures which are matched with each other.
Preferably, in the engine crankcase, the positioning structure includes a first process positioning pin hole provided in the first split body and a second process positioning pin hole provided in the second split body; the first process positioning pin hole and the second process positioning pin hole are used for being matched with the same positioning pin in an inserted mode.
Preferably, in the engine crankcase, the first process dowel hole and the second process dowel hole are coaxial, and the inner diameters of the first process dowel hole and the second process dowel hole are the same in size.
Preferably, in the engine crankcase, the first process positioning pin hole and the second process positioning pin hole are formed by machining the first split body and the second split body during a process of closing the engine crankcase.
Preferably, in the engine crankcase, the positioning structures are in multiple groups.
Preferably, in the engine crankcase, the positioning structures are two groups, and the two groups are respectively arranged on two opposite sides of the engine crankcase.
Preferably, in the engine crankcase, the first split body is an upper case body, and the second split body is a lower case body; or the first split body is a left box body, and the second split body is a right box body.
A method of manufacturing an engine crankcase, comprising:
1) processing an engine crankcase;
2) detaching two split bodies of the engine crankcase, and then cleaning and measuring;
3) and butting the two split bodies of the engine crankcase, positioning the two split bodies by using a positioning structure, and then assembling the two split bodies into a whole.
Preferably, in the above manufacturing method, the step 1) includes:
11) respectively manufacturing a first split body and a second split body of an engine crankcase;
12) and performing mould assembling processing on the first split body and the second split body, and processing the positioning structures on the first split body and the second split body.
The invention provides an engine crankcase, which is used for a motorcycle and comprises a first split body and a second split body; the second sub-body is detachably and fixedly connected with the first sub-body; wherein, the first sub-body and the second sub-body are provided with positioning structures which are matched with each other.
According to the engine crankcase, the first split body and the second split body are provided with the positioning structures which are matched with each other, so that the two split bodies are accurately positioned when being assembled, and the problems of poor shaft hole restoration degree or poor shaft hole coaxiality after the two split bodies are assembled are solved.
The invention also provides a manufacturing method of the engine crankcase, which ensures accurate installation of all parts of the motorcycle engine.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of an engine crankcase provided by an embodiment of the invention;
FIG. 2 is a schematic view of a first set of alignment structures of FIG. 1;
fig. 3 is a schematic view of a second set of positioning structures in fig. 1.
Wherein, in fig. 1-3:
a first body 101; a first process registration pin hole 111; a first set of positioning structures 10; a second body 102; a second process registration pin hole 121; a second set of locating features 20.
Detailed Description
The embodiment of the invention discloses an engine crankcase, wherein a first split body and a second split body are provided with positioning structures which are matched with each other, so that the two split bodies are accurately positioned when being assembled, mutual dislocation is avoided, and the problems of poor shaft hole restoration degree or poor shaft hole coaxiality after the two split bodies are assembled are solved. The embodiment of the invention also discloses a manufacturing method of the engine crankcase.
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. 1-3, an embodiment of the present invention provides an engine crankcase for a motorcycle, including a first split body 101 and a second split body 102; the second sub-body 102 is detachably and fixedly connected with the first sub-body 101; wherein, the first sub-body 101 and the second sub-body 102 are provided with positioning structures which are matched with each other.
According to the engine crankcase provided by the invention, the first split body 101 and the second split body 102 are provided with the mutually matched positioning structures, so that the two split bodies are accurately positioned during assembling, and the problems of poor shaft hole restoration degree or poor shaft hole coaxiality after assembling are prevented.
Specifically, in the engine crankcase, the positioning structure includes a first process positioning pin hole 111 opened in the first split body 101 and a second process positioning pin hole 121 opened in the second split body 102; the first process positioning pin hole 111 and the second process positioning pin hole 121 are used for being inserted and matched with the same positioning pin.
When the box is closed and assembled, the first split body 101 and the second split body 102 are in butt joint, the first process positioning pin hole 111 and the second process positioning pin hole 121 in the positioning structure are aligned, the positioning pin is inserted into the first process positioning pin hole 111 and the second process positioning pin hole 121, then the first split body 101 and the second split body 102 are assembled with each other, accurate alignment of the two split bodies is guaranteed, and the problem that the restoration degree of a shaft hole is poor or the coaxiality of the shaft hole is poor is avoided.
Preferably, in the engine crankcase provided by the above embodiment, the first process dowel hole 111 and the second process dowel hole 121 are coaxial, and the inner diameters of the first process dowel hole 111 and the second process dowel hole 121 are the same in size.
Further, in the engine crankcase, the first process positioning pin hole 111 and the second process positioning pin hole 121 are formed by machining the first split body 101 and the second split body 102 during a box closing machining process, and the first process positioning pin hole 111 and the second process positioning pin hole 121 can be coaxial and have the same inner diameter, that is, the process positioning pin hole penetrates through the first split body 101 and the second split body 102, so that more accurate positioning is ensured.
In the engine crankcase provided by the embodiment, the positioning structures are multiple groups, so that the positioning effect of the first split body 101 and the second split body 102 can be improved.
The positioning structures are preferably arranged into two groups, the first group of positioning structures 10 and the second group of positioning structures 20 are respectively arranged on two opposite sides of the engine crankcase, the number of the positioning structure groups can be reduced on the basis of ensuring the positioning effect, and the operation steps of two-part box combination processing are simplified.
Specifically, in the engine crankcase provided in the above embodiment, the first split body 101 is an upper case body, and the second split body 102 is a lower case body, as shown in fig. 1 to 3. Of course, the first split 101 may also be configured as a left box, and correspondingly, the second split 102 is a right box, which is not limited in this embodiment.
The first and second body segments 101 and 102 may be configured to be fixedly coupled by bolts.
According to the engine crankcase provided by the embodiment of the invention, other parts or structures do not need to be additionally and independently designed, and only the process positioning pin holes penetrating through the two parts are processed when the two parts are combined, so that the space and the cost can be saved, and the design difficulty can be reduced.
The embodiment of the invention provides a manufacturing method of an engine crankcase, which is applied to the engine crankcase provided by the embodiment and comprises the following steps:
1) machining an engine crankcase (i.e., the engine crankcase provided in the above-described embodiment);
2) disassembling the engine crankcase, cleaning and measuring;
3) the two split bodies of the engine crankcase are butted, the two split bodies are positioned by using the positioning structure, and then the two split bodies are assembled into a whole (specifically, the two split bodies can be assembled by using the fixing piece).
The step 1) comprises the following steps:
11) manufacturing a first split body 101 and a second split body 102 of an engine crankcase respectively;
12) the first and second components 101 and 102 are subjected to mould assembling processing, and positioning structures, namely process positioning pins penetrating through the two components are processed on the first and second components 101 and 102 when the first and second components 101 and 102 are subjected to mould assembling.
The manufacturing method provided by the embodiment of the invention can ensure accurate installation of each part of the motorcycle engine. Of course, the manufacturing method provided by the present embodiment also has other effects related to the engine crankcase provided by the above embodiments, and details are not described herein.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (9)

1. An engine crankcase for a motorcycle, comprising:
a first split body;
the second split body is detachably and fixedly connected with the first split body;
the split type solar water heater is characterized in that the first split body and the second split body are provided with positioning structures which are matched with each other.
2. The engine crankcase of claim 1, wherein the locating structure includes a first engineered dowel hole opening in the first split body and a second engineered dowel hole opening in the second split body; the first process positioning pin hole and the second process positioning pin hole are used for being matched with the same positioning pin in an inserted mode.
3. The engine crankcase of claim 2, wherein the first and second process dowel holes are coaxial and the first and second process dowel holes have an inner diameter that is the same size.
4. The engine crankcase of claim 2 or 3, wherein the first and second tooling dowel holes are machined when the first and second split bodies are subjected to a box-closing machining process.
5. The engine crankcase of claim 1, wherein the locating structures are in a plurality of groups.
6. The engine crankcase of claim 5, wherein the locating structures are two sets, and the two sets are disposed on opposite sides of the engine crankcase.
7. The engine crankcase of claim 1, wherein the first split body is an upper case body and the second split body is a lower case body; or the first split body is a left box body, and the second split body is a right box body.
8. A method of manufacturing an engine crankcase, comprising:
1) processing an engine crankcase;
2) detaching two split bodies of the engine crankcase, and then cleaning and measuring;
3) and butting the two split bodies of the engine crankcase, positioning the two split bodies by using a positioning structure, and then assembling the two split bodies into a whole.
9. The manufacturing method according to claim 8, wherein the step 1) includes:
11) respectively manufacturing a first split body and a second split body of an engine crankcase;
12) and performing mould assembling processing on the first split body and the second split body, and processing the positioning structures on the first split body and the second split body.
CN202011624772.4A 2020-12-31 2020-12-31 Engine crankcase and manufacturing method thereof Withdrawn CN112832920A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011624772.4A CN112832920A (en) 2020-12-31 2020-12-31 Engine crankcase and manufacturing method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011624772.4A CN112832920A (en) 2020-12-31 2020-12-31 Engine crankcase and manufacturing method thereof

Publications (1)

Publication Number Publication Date
CN112832920A true CN112832920A (en) 2021-05-25

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CN202011624772.4A Withdrawn CN112832920A (en) 2020-12-31 2020-12-31 Engine crankcase and manufacturing method thereof

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Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103291489A (en) * 2013-06-04 2013-09-11 力帆实业(集团)股份有限公司 Motorcycle engine with low vibration
CN203335261U (en) * 2013-06-04 2013-12-11 力帆实业(集团)股份有限公司 Motorcycle engine capable of reducing vibration
EP2806121A2 (en) * 2013-05-23 2014-11-26 Yamaha Hatsudoki Kabushiki Kaisha Motorcycle
EP2806120A2 (en) * 2013-05-23 2014-11-26 Yamaha Hatsudoki Kabushiki Kaisha Internal combustion engine and motorcycle equipped with the engine
CN205154432U (en) * 2015-12-01 2016-04-13 力帆实业(集团)股份有限公司 Combination of motorcycle engine crankcase
CN107116342A (en) * 2017-05-30 2017-09-01 胡建锋 A kind of crankcase mechanical processing technique
CN111250942A (en) * 2020-03-12 2020-06-09 无锡压缩机股份有限公司 Processing method of split crankcase of large six-row three-stage labyrinth compressor
CN210769057U (en) * 2019-10-17 2020-06-16 奥丁（上海）消防设备有限公司 Split type crankcase duplex bearing hole seat structure of two-stroke engine
CN211116303U (en) * 2019-12-31 2020-07-28 常州豪爵铃木摩托车有限公司 Gas distribution chain wheel central-positioned crankcase mechanism for motorcycle
CN211500820U (en) * 2019-12-31 2020-09-15 常州豪爵铃木摩托车有限公司 Upper and lower box-closing type engine crankcase structure for motorcycle
CN214007353U (en) * 2020-12-31 2021-08-20 浙江春风动力股份有限公司 Motorcycle and engine crankcase thereof

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2806121A2 (en) * 2013-05-23 2014-11-26 Yamaha Hatsudoki Kabushiki Kaisha Motorcycle
EP2806120A2 (en) * 2013-05-23 2014-11-26 Yamaha Hatsudoki Kabushiki Kaisha Internal combustion engine and motorcycle equipped with the engine
CN103291489A (en) * 2013-06-04 2013-09-11 力帆实业(集团)股份有限公司 Motorcycle engine with low vibration
CN203335261U (en) * 2013-06-04 2013-12-11 力帆实业(集团)股份有限公司 Motorcycle engine capable of reducing vibration
CN205154432U (en) * 2015-12-01 2016-04-13 力帆实业(集团)股份有限公司 Combination of motorcycle engine crankcase
CN107116342A (en) * 2017-05-30 2017-09-01 胡建锋 A kind of crankcase mechanical processing technique
CN210769057U (en) * 2019-10-17 2020-06-16 奥丁（上海）消防设备有限公司 Split type crankcase duplex bearing hole seat structure of two-stroke engine
CN211116303U (en) * 2019-12-31 2020-07-28 常州豪爵铃木摩托车有限公司 Gas distribution chain wheel central-positioned crankcase mechanism for motorcycle
CN211500820U (en) * 2019-12-31 2020-09-15 常州豪爵铃木摩托车有限公司 Upper and lower box-closing type engine crankcase structure for motorcycle
CN111250942A (en) * 2020-03-12 2020-06-09 无锡压缩机股份有限公司 Processing method of split crankcase of large six-row three-stage labyrinth compressor
CN214007353U (en) * 2020-12-31 2021-08-20 浙江春风动力股份有限公司 Motorcycle and engine crankcase thereof

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Application publication date: 20210525

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