CN208578954U - A kind of inserts and injection made gear - Google Patents
A kind of inserts and injection made gear Download PDFInfo
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- CN208578954U CN208578954U CN201820921175.XU CN201820921175U CN208578954U CN 208578954 U CN208578954 U CN 208578954U CN 201820921175 U CN201820921175 U CN 201820921175U CN 208578954 U CN208578954 U CN 208578954U
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- inserts
- tooth
- tooth connection
- gear
- connection
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Abstract
The utility model belongs to involute teeth technical field, discloses a kind of inserts and injection made gear.The inserts includes inserts ontology and annular knurl, and wherein annular knurl includes that several are circumferentially arranged in the tooth connection on the outer wall of inserts ontology, and tooth connection is at least one of stepped tooth, rectangular teeth and involute teeth.The injection made gear includes plastic gear and above-mentioned inserts, and inserts is set to the inside of plastic gear, and the outer wall of inserts is mutually engaged with the inner wall of injection made gear.It is at least one of stepped tooth, rectangular teeth and involute teeth by the way that tooth connection is arranged, the top width of tooth connection obviously increases, and reduces stress of the tooth connection at top position and concentrates, and then improves the bearing strength of injection made gear.
Description
Technical field
The utility model relates to gear technique field more particularly to a kind of inserts and injection made gear.
Background technique
Currently, injection made gear, which is passed through, carries out injection molding frequently with the mode that inserts is embedded to.In processing, inserts is first processed,
Then it places the insert into the molding die of plastic gear, then injection molding forms injection made gear again.
In order to avoid being slided between plastic gear and inserts, it will usually annular knurl be arranged on the outer wall of inserts.Specifically
Ground is provided with straight knurling 3 (as shown in Figure 1) or hatching knurling 4 (as shown in Figure 2), the annular knurl of both forms on inserts
Pressure angle usually at 45 ° or so, top apex position is very sharp.After insert injection moulding, due to its top apex position
Place has very big stress and concentrates, and plastic gear is easy to be broken from the tip of inserts, leads to the carrying of entire injection made gear
Intensity is poor.Meanwhile inserts has biggish pressure angle, but also plastic gear is easier to relative to inserts sliding, to drop
The low bearing capacity of plastic gear.
Utility model content
The purpose of this utility model is to provide a kind of inserts and injection made gears, reduce inserts at top apex position
Stress is concentrated, and reduces the trend that plastic gear and inserts mutually slide, and then improve the bearing strength of injection made gear.
For this purpose, the utility model uses following technical scheme:
A kind of inserts, comprising: inserts ontology；Annular knurl, the annular knurl include that several are circumferentially arranged in the inserts sheet
Tooth connection on the outer wall of body, the tooth connection are at least one of stepped tooth, rectangular teeth and involute teeth.
Preferably, inserts is made of metal.
Preferably, inserts is made of highstrenghtpiston.
Preferably, being provided with holding tank between the two neighboring tooth connection.
Preferably, the tooth connection is stepped tooth.
Preferably, the angle between two flank profils of the tooth connection is 0 ° -60 °.
Preferably, the facewidth of the tooth connection at tooth top position is less than tooth of the tooth connection at bottom of the tooth position
It is wide.
Preferably, the facewidth of the tooth connection at tooth top position is greater than tooth of the tooth connection at bottom of the tooth position
It is wide.
Preferably, the holding tank is dovetail groove.
Preferably, the tooth connection is involute teeth.
Preferably, the tooth connection is rectangular teeth.
In order to achieve the above object, the present embodiment additionally provides a kind of injection made gear, including plastic gear and above-mentioned inserts, institute
The inside that inserts is set to the plastic gear is stated, and the outer wall of the inserts is mutually engaged with the inner wall of the injection made gear.
The utility model has the beneficial effects that
1) it is circumferentially set on the outer wall of inserts ontology, is avoided between plastic gear and inserts by several tooth connections
There is the trend along the circumferential direction mutually slided, thus both avoid being easy along the circumferential direction mutually to slide in stress
Situation ensure that the reliability of circumferencial direction connection.
2) by the way that several tooth connections are circumferentially set on the outer wall of inserts ontology, and tooth connection be at least stepped tooth,
The top width of one of rectangular teeth and involute teeth, tooth connection obviously increases, and avoids tooth connection in top apex position
Locate very sharp situation, reduces stress of the tooth connection at top position and concentrate, and then improve the carrying energy of injection made gear
Power.Meanwhile the pressure angle of tooth connection is obviously reduced, so as to avoid the trend of plastic gear and inserts mutually slided, in turn
Improve the bearing capacity of injection made gear
3) the present embodiment additionally provides a kind of injection made gear, including plastic gear and above-mentioned inserts, inserts are set to plastics
The inside of gear, reduces the internal stress of plastic gear cladding inserts, and then improves the intensity of injection made gear.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of straight knurling in the prior art；
Fig. 2 is the structural schematic diagram of hatching knurling in the prior art；
Fig. 3 is a form of structural schematic diagram that tooth connection is stepped tooth in the utility model inserts；
Fig. 4 is the another form of structural schematic diagram that tooth connection is stepped tooth in the utility model inserts；
Fig. 5 is that tooth connection is the structural schematic diagram of another form of stepped tooth in the utility model inserts；
Fig. 6 is the structural schematic diagram that tooth connection is involute teeth in the utility model inserts；
Fig. 7 is the structural schematic diagram that tooth connection is rectangular teeth in the utility model inserts；
Fig. 8 is a form of structural schematic diagram of the utility model injection made gear；
Fig. 9 is the another form of structural schematic diagram of the utility model injection made gear；
Figure 10 is the explosive view of injection made gear in Fig. 9.
In figure:
1, inserts；2, plastic gear；3, straight knurling；4, hatching knurling；
11, inserts ontology；12, annular knurl；
121, tooth connection；122, holding tank；123, groove.
Specific embodiment
Further illustrate the technical solution of the utility model below with reference to the accompanying drawings and specific embodiments.
A kind of inserts is present embodiments provided, as shown in fig. 3 to 7, which includes inserts ontology 11 and annular knurl 12, wherein
Annular knurl 12 includes that several are circumferentially arranged in the tooth connection 121 on the outer wall of inserts ontology 11, and tooth connection 121 is at least trapezoidal
One of tooth, rectangular teeth and involute teeth.
It is circumferentially arranged on the outer wall of inserts ontology 11, avoiding plastic gear 2 and embedding by several tooth connections 121
The case where occurring the trend mutually slided between part, and the two is caused to be easily separated from stress, improves injection made gear
Bearing capacity.
It is at least one of stepped tooth, rectangular teeth and involute teeth, the top of tooth connection 121 by setting tooth connection 121
Portion's width obviously increases, and reduces stress of the tooth connection 121 at top position and concentrates, and then improves the carrying energy of injection made gear
Power.
Preferably, above-mentioned inserts can be made of metal, it is also possible to highstrenghtpiston and is made.
As shown in fig. 3 to 7, it is provided with holding tank 122 between two neighboring tooth connection 121, due to several tooth connections 121
It is circumferentially uniformly arranged on its outer wall along inserts ontology 11, so that the basic phase of the shape of the shape of holding tank 122 and tooth connection 121
Together, only the shape of the two is inverted each other.
As shown in Figure 3-4, when tooth connection 121 is stepped tooth, section of the tooth connection 121 in its short transverse is ladder
Shape toothing, and the facewidth of the tooth connection 121 at tooth top position is less than the facewidth of the tooth connection 121 at bottom of the tooth position.Wherein connect
Connecing the angle between two flank profils of tooth 121 is 0 ° -60 °, specific as shown in figure 3, folder between two flank profils of tooth connection 121
Angle is 50 °；As shown in figure 4, the angle between two flank profils of tooth connection 121 is 60 °.Compare annular knurl 12 in the prior art
It for pressure angle is 45 °, uses tooth connection 121 for this kind of stepped tooth, avoids tooth connection 121 at top apex position very
Sharply, the case where position for causing plastic gear 2 to be in contact with the part is easy to appear fracture, and then solve stress concentration
Problem, so that the bearing capacity of 2 inserts of plastic gear at least improves 40% or more.
As shown in figure 5, it is stepped tooth that the tooth connection 121, which is also, but the facewidth of the tooth connection 121 at tooth top position is big
In the facewidth of the tooth connection 121 at bottom of the tooth position, holding tank 122 is specially dovetail groove at this time.As shown in fig. 6, tooth connection 121 is equal
For involute gear.As shown in fig. 7, when tooth connection 121 is rectangular teeth, section of the tooth connection 121 in its short transverse
For rectangle toothing, holding tank 122 is specially rectangle tooth socket at this time.
It is understood that since plastic gear 2 can protrude into the holding tank 122, compared with prior art, plastics
The part that gear 2 protrudes into dovetail groove is blocked by inserts ontology 11, and plastic gear 2 cannot radially and circumferentially sliding along inserts
It is dynamic, it both prevents from occurring sliding or being detached from stress and is unable to normal use situation.
As seen in figures 3-6, plastic gear 2 and inserts 1 are gone back in axial mutually sliding, above-mentioned tooth connection 121 in order to prevent
Provided with groove 123.
It should be strongly noted that several above-mentioned tooth connections 121 can be in stepped tooth, rectangular teeth and involute teeth
One or more of combinations, concrete form can be adjusted according to needs of production.
The present embodiment additionally provides a kind of injection made gear, as seen in figs. 8-10, the injection made gear include plastic gear 2 and on
Inserts 1 is stated, inserts 1 is set to the inside of plastic gear 2, and the outer wall of inserts 1 is mutually engaged with the inner wall of plastic gear 2.
It include plastic gear 2 and above-mentioned inserts 1 by setting injection made gear, inserts 1 is set to the inside of plastic gear 2,
It reduces plastic gear 2 and coats the internal stress of inserts 1, and then improve the intensity of injection made gear.
As shown in figure 8, inserts 1 in axial direction on thickness be equal to plastic gear 2 in axial direction on thickness.
As shown in figs. 9-10, inserts ontology 11 in axial direction on thickness be less than plastic gear 2 in axial direction on
Thickness enables inserts 1 to be wrapped in the inside of plastic gear 2.
Obviously, the above embodiments of the present invention is used for the purpose of clearly illustrating examples for clearly illustrating the present invention, and
It is not limitations of the embodiments of the present invention.For those of ordinary skill in the art, in above description
On the basis of can also make other variations or changes in different ways.There is no need and unable to give all embodiments
Exhaustion.Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention etc., should be included in
Within the protection scope of the utility model claims.
Claims (10)
1. a kind of inserts characterized by comprising
Inserts ontology (11)；
Annular knurl (12), the annular knurl (12) include the tooth connection that several circumferential directions are set on the outer wall of the inserts ontology (11)
(121), the tooth connection (121) is at least one of stepped tooth, rectangular teeth and involute teeth.
2. inserts according to claim 1, which is characterized in that be provided with appearance between the two neighboring tooth connection (121)
It receives slot (122).
3. inserts according to claim 2, which is characterized in that the tooth connection (121) is stepped tooth.
4. inserts according to claim 3, which is characterized in that the angle between two flank profils of the tooth connection (121)
It is 0 ° -60 °.
5. inserts according to claim 3, which is characterized in that the facewidth of the tooth connection (121) at tooth top position is small
In the facewidth of the tooth connection (121) at bottom of the tooth position.
6. inserts according to claim 3, which is characterized in that the facewidth of the tooth connection (121) at tooth top position is big
In the facewidth of the tooth connection (121) at bottom of the tooth position.
7. inserts according to claim 6, which is characterized in that the holding tank (122) is dovetail groove.
8. inserts according to claim 1, which is characterized in that the tooth connection (121) is involute teeth.
9. inserts according to claim 1, which is characterized in that the tooth connection (121) is rectangular teeth.
10. a kind of injection made gear, which is characterized in that the inserts including plastic gear (2) and as described in claim 1-9 is any
(1), the inserts (1) is set to the inside of the plastic gear (2), and the outer wall of the inserts (1) and the plastic gear
(2) inner wall is mutually engaged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820921175.XU CN208578954U (en) | 2018-06-14 | 2018-06-14 | A kind of inserts and injection made gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820921175.XU CN208578954U (en) | 2018-06-14 | 2018-06-14 | A kind of inserts and injection made gear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208578954U true CN208578954U (en) | 2019-03-05 |
Family
ID=65507797
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820921175.XU Active CN208578954U (en) | 2018-06-14 | 2018-06-14 | A kind of inserts and injection made gear |
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| Country | Link |
|---|---|
| CN (1) | CN208578954U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113339379A (en) * | 2021-06-03 | 2021-09-03 | 上海亿泊材料应用技术有限公司 | Threaded connection structure and design method thereof |
| CN113389872A (en) * | 2020-03-11 | 2021-09-14 | 操纵技术Ip控股公司 | Stamped wheel hub for casting plastic |
-
2018
- 2018-06-14 CN CN201820921175.XU patent/CN208578954U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113389872A (en) * | 2020-03-11 | 2021-09-14 | 操纵技术Ip控股公司 | Stamped wheel hub for casting plastic |
| CN113339379A (en) * | 2021-06-03 | 2021-09-03 | 上海亿泊材料应用技术有限公司 | Threaded connection structure and design method thereof |
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Address after: 201806 area B and D, 1st floor, building 1, 569 xigangshen Road, Jiading District, Shanghai Patentee after: SHANGHAI YIBO MATERIAL APPLICATION TECHNOLOGY Co.,Ltd. Address before: 200433 room C302, block B, building 12, 128 Xiangyin Road, Yangpu District, Shanghai Patentee before: SHANGHAI YIBO MATERIAL APPLICATION TECHNOLOGY Co.,Ltd. |