CN203641446U - Plastic cam shaft gear - Google Patents
Plastic cam shaft gear Download PDFInfo
- Publication number
- CN203641446U CN203641446U CN201320724735.XU CN201320724735U CN203641446U CN 203641446 U CN203641446 U CN 203641446U CN 201320724735 U CN201320724735 U CN 201320724735U CN 203641446 U CN203641446 U CN 203641446U
- Authority
- CN
- China
- Prior art keywords
- gear
- spoke
- wheel rim
- rectangular opening
- rivet
- 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.)
- Expired - Fee Related
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Abstract
The utility model discloses a plastic cam shaft gear formed through injection moulding of high-strength plastic reinforced nylon. The plastic cam shaft gear comprises a hub (1), a spoke (2) and a flange (3), wherein a plurality of gear teeth (5) are formed in the circumference of the flange (3); rectangular openings (6) are formed in the spoke (2) radially; fillets are arranged at four corners of each rectangular hole; two first fillets (R1) near the gear teeth are smaller than two secondary fillets (R2) near a camshaft mounting hole; rivets (8), which are integrally formed with the gear, are arranged on the back surface of the gear and in junction positions between the spoke and the flange; rivet holes (7) are formed in the junction positions between the spoke and the flange; third fillets (R3) are formed in the ends, on the front side of the gear, of the rectangular holes and the rivet holes. The plastic cam shaft gear has the advantages that the mounting is convenient; the end surface is flat; the strength is reliable.
Description
Technical field
The utility model relates to a kind of gear being sleeved on camshaft, belongs to mechanical transmissioning technology field.
Background technique
Gear is component conventional in mechanical transmission, and existing is all metal material for the gear on camshaft substantially, to guarantee that enough intensity carries the load in transmission process.But the camshaft gear wheel employing machine of metal material adds and forms, manufacture cost is high, and weight is large, and in use vibration is large, noise is high.
At present, also have a part of plastic gear, geomery is less conventionally, is suitable for the occasion that some bearing loads are less and uses, and large-sized plastic gear is difficult for guaranteeing at injection molding process middle-end surface evenness.Will be by plastic gear as camshaft gear wheel, solve in bearing capacity, property easy for installation and injection molding process the series of problems such as gearwheel end face flatness.
Model utility content
The utility model improves for above-mentioned technical problem, intend providing a kind of easy for installation, end face is smooth, intensity is reliably for the plastic gear of camshaft.
For this reason, a kind of plastic cam shaftgear that the utility model provides, adopt highstrenghtpiston to strengthen nylon injection-molding moulding, comprise the wheel hub (1) of arranging successively from inside to outside, spoke (2) and wheel rim (3), the center of described wheel hub (1) is provided with camshaft mounting hole (4), the periphery of wheel rim (3) is provided with some gear teeth (5), the thickness of spoke (2) is less than the thickness of wheel rim (3), the thickness of wheel rim (3) is less than the thickness of wheel hub (1), key is: on described spoke (2), be provided with the rectangular opening (6) distributing radially, and four angles of rectangular opening (6) are provided with rounding, and be less than two the second roundings (R2) near camshaft mounting hole (4) near two first roundings (R1) of the gear teeth (5), be provided with the rivet (8) with gear integrated injection molding at the back side of gear, and rivet (8) is positioned at the position, boundary of described spoke (2) and wheel rim (3), position, boundary at spoke (2) and wheel rim (3) is also provided with rivet hole (7), described rectangular opening (6), one end that rivet hole (7) is positioned at gear front is provided with the 3rd rounding (R3).
Be preferably, the length of described rectangular opening (6) and width equate, and distance between two rectangular openings (6) is less than the half of rectangular opening (6) width.
The beneficial effects of the utility model are: four angles that distribute are radially set on spoke all with the rectangular opening of rounding, and define in four angles of rectangular opening, be less than two the second roundings near camshaft mounting hole near two the first roundings of the gear teeth, in order to save material on the one hand, reduce gear weight, cost-saving, also guaranteed on the other hand the end face flatness of spoke position in molding and forming, because the relative wheel rim of spoke, wheel hub cave inward, therefore in molding and forming, flatness is difficult to ensure card most; Simultaneously, be provided with the rivet with gear integrated injection molding at the back side of gear, be convenient to install, further saved manufacture cost, in conjunction with remaining rivet hole, realize the assembling with other part, for avoiding arranging rivet and rivet hole, the end face flatness of gear is impacted, define rivet and be arranged on the back side of gear, rivet, rivet hole are positioned at the position, boundary of spoke and wheel rim, and one end that rectangular opening, rivet hole are positioned at gear front is provided with the 3rd rounding.
Accompanying drawing explanation
Fig. 1 is plan view of the present utility model.
Fig. 2 is the rear view of Fig. 1.
Fig. 3 is the right elevation of Fig. 1.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail:
In conjunction with Fig. 1---shown in Fig. 3, a kind of plastic cam shaftgear, adopts highstrenghtpiston to strengthen nylon injection-molding (being PA66) moulding, is mainly made up of wheel hub 1, spoke 2 and wheel rim 3, and three arranges from inside to outside successively.Be provided with camshaft mounting hole 4 at the center of wheel hub 1, for being sleeved on camshaft.The periphery of wheel rim 3 is provided with some gear teeth 5, and the thickness of spoke 2 is less than the thickness of wheel rim 3, wheel hub 1, and spoke 2 is for being arranged on the annular groove between wheel rim 3 and wheel hub 1.
On spoke 2, be provided with radially the rectangular opening 6 distributing, and four angles of rectangular opening 6 are provided with rounding, and are less than two the second rounding R2 near camshaft mounting hole 4 near two the first rounding R1 of the gear teeth 5.Be provided with at the back side of gear and the rivet 8 of gear integrated injection molding, and rivet 8 is positioned at the position, boundary of spoke 2 and wheel rim 3.Also be provided with some rivet holes 7 in the position, boundary of spoke 2 and wheel rim 3.One end that rectangular opening 6, rivet hole 7 are positioned at gear front is provided with the 3rd rounding R3.
Preferably, the length of rectangular opening 6 and width equate, and distance between two rectangular openings 6 is less than the half of rectangular opening 6 width.
Claims (2)
1. a plastic cam shaftgear, adopt highstrenghtpiston to strengthen nylon injection-molding moulding, comprise the wheel hub (1) of arranging successively from inside to outside, spoke (2) and wheel rim (3), the center of described wheel hub (1) is provided with camshaft mounting hole (4), the periphery of wheel rim (3) is provided with some gear teeth (5), the thickness of spoke (2) is less than the thickness of wheel rim (3), the thickness of wheel rim (3) is less than the thickness of wheel hub (1), it is characterized in that: on described spoke (2), be provided with the rectangular opening (6) distributing radially, and four angles of rectangular opening (6) are provided with rounding, and be less than two the second roundings (R2) near camshaft mounting hole (4) near two first roundings (R1) of the gear teeth (5), be provided with the rivet (8) with gear integrated injection molding at the back side of gear, and rivet (8) is positioned at the position, boundary of described spoke (2) and wheel rim (3), position, boundary at spoke (2) and wheel rim (3) is also provided with rivet hole (7), described rectangular opening (6), one end that rivet hole (7) is positioned at gear front is provided with the 3rd rounding (R3).
2. according to plastic cam shaftgear claimed in claim 1, it is characterized in that: the length of described rectangular opening (6) and width equate, and distance between two rectangular openings (6) is less than the half of rectangular opening (6) width.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320724735.XU CN203641446U (en) | 2013-11-15 | 2013-11-15 | Plastic cam shaft gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320724735.XU CN203641446U (en) | 2013-11-15 | 2013-11-15 | Plastic cam shaft gear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203641446U true CN203641446U (en) | 2014-06-11 |
Family
ID=50872692
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320724735.XU Expired - Fee Related CN203641446U (en) | 2013-11-15 | 2013-11-15 | Plastic cam shaft gear |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203641446U (en) |
-
2013
- 2013-11-15 CN CN201320724735.XU patent/CN203641446U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140611 Termination date: 20141115 |
|
| EXPY | Termination of patent right or utility model |