CN103115138A - Motorcycle pressure casting type transmission box top cover - Google Patents
Motorcycle pressure casting type transmission box top cover Download PDFInfo
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- CN103115138A CN103115138A CN2012105312142A CN201210531214A CN103115138A CN 103115138 A CN103115138 A CN 103115138A CN 2012105312142 A CN2012105312142 A CN 2012105312142A CN 201210531214 A CN201210531214 A CN 201210531214A CN 103115138 A CN103115138 A CN 103115138A
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- mounting hole
- pressure casting
- top cover
- fastening piece
- transmission box
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Abstract
The invention belongs to the technical field of engines, and particularly relates to a motorcycle pressure casting type transmission box top cover. A transmission box is manufactured in a pressure casting technology, and meanwhile a body is made of aluminum alloy materials. The wall thickness of the body is 3.5-5 mm. Compared with the prior pressure casting art, the body is thin so that the weight of the body is lightened, proportion of the body when the body is assembled in the whole transmission box is lowered, an air hole when the body is subjected to pressure casting is minished, and meanwhile a reinforced rib is arranged on the outer surface of the body, the whole strength of the body is strengthened, in addition when the body is subjected to pressure casting, a used die has a high accuracy standard and a general standard, and accordingly the pressure casting type body has universality.
Description
Technical field
The invention belongs to technical field of engines, be specifically related to motorcycle pressure-casting type transmission case top cover.
Background technique
At present, the top cover of transmission case is all that to select cast iron be material, is cast into basic technology with black.Product size does not have versatility like this, makes the assembling difficulty.And cast iron density is 7.8(g/cc), make the quality of transmission case top cover large, be assembled in whole transmission case, the shared proportion of top cover is larger, is unfavorable for the light-weight design of machinery.Sand casting process exists low every of manufacturing efficiency needs 7-8 minute, yields poorly, and machining allowance is large, and precision is low, and scaling loss is many, and production environment is abominable, and following process is numerous and diverse, and outward appearance such as slightly makes at the defective.So now a lot of enterprises change original casting technique into extrusion process, making in the past, the top cover size of the transmission case of casting changes to some extent.
Summary of the invention
The present invention can provide a kind of quality light, and processing is simple, the motorcycle pressure-casting type transmission case top cover of highly versatile.
In order to solve the problems of the technologies described above, the invention provides following technological scheme: motorcycle pressure-casting type transmission case top cover, the body that comprises aluminum alloy, body is provided with air inlet hole, part mounting hole, fastening piece mounting hole, described body wall thickness is 3.5～5mm, this external surface is provided with stiffening rib, and stiffening rib is strip structure, is distributed in air inlet hole, part mounting hole, fastening piece mounting hole surrounding.
Adopt technique scheme, in the present invention, because the technique that transmission case adopts die casting to make, body is aluminum alloy material simultaneously, and the wall thickness of body is 3.5～5mm, and is thinner compared to the body of existing extrusion process, alleviated like this quality of body, reduce body shared proportion when whole transmission case assembling, can also reduce the pore of body when die casting; Outer surface at body is provided with stiffening rib simultaneously, because die casting clearancen gas entering opening, part mounting hole, fastening piece mounting hole on body, intensity around it can be affected, so the surrounding at air inlet hole, part mounting hole, fastening piece mounting hole is provided with stiffening rib, and stiffening rib is list structure, can increase the intensity at each position of body, also very attractive in appearance; Body is when die casting in addition, and the mould of employing has very high accuracy standard and the universal standard, so the body of pressure-casting type has versatility more.
Further, in the prior art, the body of casting is because wall thickness is thicker, so the fastening piece mounting hole just must first cast out step, then holes, could use after tapping.In the present invention program, the wall thickness of body is reduced, fastening piece mounting hole and body integral die-cast get final product like this.
Description of drawings
The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments:
Fig. 1 is the structural representation of motorcycle pressure-casting type transmission case top cover of the present invention.
Embodiment
Embodiment 1:
As shown in Figure 1: motorcycle pressure-casting type transmission case top cover, the body 1 that comprises aluminum alloy, body 1 is provided with air inlet hole 2, part mounting hole 3, fastening piece mounting hole 4, body 1 wall thickness is D, D is 3.5mm, and body 1 outer surface is provided with stiffening rib 5, and stiffening rib 5 is list structure, be distributed in air inlet hole 2, part mounting hole 3, fastening piece mounting hole 4 surroundings, fastening piece mounting hole 4 and body 1 are the integrated type die castings.
In the present embodiment, because the technique that transmission case adopts die casting to make, body 1 is aluminum alloy material simultaneously, and the wall thickness of body 1 is D, D is 3.5mm, and is thinner compared to the body of existing extrusion process, alleviated like this quality of body 1, reduce body 1 shared proportion when whole transmission case assembling, can also reduce the pore of body 1 when die casting; Outer surface at body 1 is provided with stiffening rib 5 simultaneously, because die casting clearancen gas entering opening 2, part mounting hole 3, fastening piece mounting hole 4 on body 1, intensity around it can be affected, so the surrounding at air inlet hole 2, part mounting hole 3, fastening piece mounting hole 4 is provided with stiffening rib 5, and stiffening rib 5 is list structure, can increase the intensity at each position of body 1, also very attractive in appearance; Body 1 is when die casting in addition, and the mould of employing has very high accuracy standard and the universal standard, so the body 1 of pressure-casting type has versatility more; In the prior art, the body of casting 1 is because wall thickness is thicker, so fastening piece mounting hole 4 just must first cast out step, then holes, could use after tapping.In the present invention program, the wall thickness of body 1 is reduced, fastening piece mounting hole 4 gets final product with body 1 integral die-cast like this.
Embodiment 2:
As shown in Figure 1: motorcycle pressure-casting type transmission case top cover, the body 1 that comprises aluminum alloy, body 1 is provided with air inlet hole 2, part mounting hole 3, fastening piece mounting hole 4, body 1 wall thickness is D, D is 4mm, and body 1 outer surface is provided with stiffening rib 5, and stiffening rib 5 is list structure, be distributed in air inlet hole 2, part mounting hole 3, fastening piece mounting hole 4 surroundings, fastening piece mounting hole 4 and body 1 are the integrated type die castings.
In the present embodiment, because the technique that transmission case adopts die casting to make, body 1 is aluminum alloy material simultaneously, and the wall thickness of body 1 is D, D is 4mm, and is thinner compared to the body of existing extrusion process, alleviated like this quality of body 1, reduce body 1 shared proportion when whole transmission case assembling, can also reduce the pore of body 1 when die casting; Outer surface at body 1 is provided with stiffening rib 5 simultaneously, because die casting clearancen gas entering opening 2, part mounting hole 3, fastening piece mounting hole 4 on body 1, intensity around it can be affected, so the surrounding at air inlet hole 2, part mounting hole 3, fastening piece mounting hole 4 is provided with stiffening rib 5, and stiffening rib 5 is list structure, can increase the intensity at each position of body 1, also very attractive in appearance; Body 1 is when die casting in addition, and the mould of employing has very high accuracy standard and the universal standard, so the body 1 of pressure-casting type has versatility more; In the prior art, the body of casting 1 is because wall thickness is thicker, so fastening piece mounting hole 4 just must first cast out step, then holes, could use after tapping.In the present invention program, the wall thickness of body 1 is reduced, fastening piece mounting hole 4 gets final product with body 1 integral die-cast like this.
Embodiment 3:
As shown in Figure 1: motorcycle pressure-casting type transmission case top cover, the body 1 that comprises aluminum alloy, body 1 is provided with air inlet hole 2, part mounting hole 3, fastening piece mounting hole 4, body 1 wall thickness is D, D is 5mm, and body 1 outer surface is provided with stiffening rib 5, and stiffening rib 5 is list structure, be distributed in air inlet hole 2, part mounting hole 3, fastening piece mounting hole 4 surroundings, fastening piece mounting hole 4 and body 1 are the integrated type die castings.
In the present embodiment, because the technique that transmission case adopts die casting to make, body 1 is aluminum alloy material simultaneously, and the wall thickness of body 1 is D, D is 5mm, and is thinner compared to the body of existing extrusion process, alleviated like this quality of body 1, reduce body 1 shared proportion when whole transmission case assembling, can also reduce the pore of body 1 when die casting; Outer surface at body 1 is provided with stiffening rib 5 simultaneously, because die casting clearancen gas entering opening 2, part mounting hole 3, fastening piece mounting hole 4 on body 1, intensity around it can be affected, so the surrounding at air inlet hole 2, part mounting hole 3, fastening piece mounting hole 4 is provided with stiffening rib 5, and stiffening rib 5 is list structure, can increase the intensity at each position of body 1, also very attractive in appearance; Body 1 is when die casting in addition, and the mould of employing has very high accuracy standard and the universal standard, so the body 1 of pressure-casting type has versatility more; In the prior art, the body of casting 1 is because wall thickness is thicker, so fastening piece mounting hole 4 just must first cast out step, then holes, could use after tapping.In the present invention program, the wall thickness of body 1 is reduced, fastening piece mounting hole 4 gets final product with body 1 integral die-cast like this.
In the present invention program, the wall thickness of body 1 is D, and the span of D is between 3.5～5mm, can reach the intensity needs of body 1.
Above-described is only the preferred embodiment of the present invention; should be understood that; for a person skilled in the art; under the prerequisite that does not break away from structure of the present invention; can also make some distortion and improvement; these also should be considered as protection scope of the present invention, and these can not affect effect of the invention process and practical applicability.
Claims (2)
1. motorcycle pressure-casting type transmission case top cover, it is characterized in that: the body that comprises aluminum alloy, body is provided with air inlet hole, part mounting hole, fastening piece mounting hole, described body wall thickness is 3.5～5mm, this external surface is provided with stiffening rib, stiffening rib is strip structure, is distributed in air inlet hole, part mounting hole, fastening piece mounting hole surrounding.
2. motorcycle pressure-casting type transmission case top cover according to claim 1, it is characterized in that: described fastening piece mounting hole and body are the integrated type die castings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105312142A CN103115138A (en) | 2012-12-11 | 2012-12-11 | Motorcycle pressure casting type transmission box top cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105312142A CN103115138A (en) | 2012-12-11 | 2012-12-11 | Motorcycle pressure casting type transmission box top cover |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103115138A true CN103115138A (en) | 2013-05-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012105312142A Pending CN103115138A (en) | 2012-12-11 | 2012-12-11 | Motorcycle pressure casting type transmission box top cover |
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| Country | Link |
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| CN (1) | CN103115138A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105864402A (en) * | 2016-06-21 | 2016-08-17 | 肇庆高新区凯盈顺汽车设计有限公司 | Transmission housing |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02204191A (en) * | 1989-02-02 | 1990-08-14 | Honda Motor Co Ltd | Swing type power unit case |
| CN201313168Y (en) * | 2009-01-23 | 2009-09-23 | 宁波埃利特模具制造有限公司 | Aluminum-alloy die-casting mold for gearbox housing |
| CN202424365U (en) * | 2012-01-06 | 2012-09-05 | 浙江新菱电机有限公司 | Novel motor outer cover |
| CN203067743U (en) * | 2012-12-11 | 2013-07-17 | 重庆百吉四兴压铸有限公司 | Motorcycle die-casting type transmission box top cover |
-
2012
- 2012-12-11 CN CN2012105312142A patent/CN103115138A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02204191A (en) * | 1989-02-02 | 1990-08-14 | Honda Motor Co Ltd | Swing type power unit case |
| CN201313168Y (en) * | 2009-01-23 | 2009-09-23 | 宁波埃利特模具制造有限公司 | Aluminum-alloy die-casting mold for gearbox housing |
| CN202424365U (en) * | 2012-01-06 | 2012-09-05 | 浙江新菱电机有限公司 | Novel motor outer cover |
| CN203067743U (en) * | 2012-12-11 | 2013-07-17 | 重庆百吉四兴压铸有限公司 | Motorcycle die-casting type transmission box top cover |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105864402A (en) * | 2016-06-21 | 2016-08-17 | 肇庆高新区凯盈顺汽车设计有限公司 | Transmission housing |
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Application publication date: 20130522 |