CN209925559U - Large-wall-thickness injection molding gear - Google Patents
Large-wall-thickness injection molding gear Download PDFInfo
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- CN209925559U CN209925559U CN201920234634.1U CN201920234634U CN209925559U CN 209925559 U CN209925559 U CN 209925559U CN 201920234634 U CN201920234634 U CN 201920234634U CN 209925559 U CN209925559 U CN 209925559U
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Abstract
The utility model relates to an injection moulding technical field discloses a gear of moulding plastics of big wall thickness, and this gear of moulding plastics of big wall thickness is including supporting rim plate, first injection molding and second injection molding. The outer edge of the supporting wheel disc is provided with anti-moving teeth which are vertical to the axis of the supporting wheel disc; the first injection molding piece and the supporting wheel disc are coaxially arranged, working wheel teeth are arranged on the outer edge of the first injection molding piece, anti-rotation teeth are arranged on the inner edge of the first injection molding piece, and the anti-rotation teeth are parallel to the axis of the first injection molding piece; the second injection molding sets up between supporting rim plate and the first injection molding, and just prevents moving tooth and anti-rotation tooth cooperation respectively. The utility model discloses an prevent moving the tooth and prevent that the tooth has restricted the axial displacement and the circumferential direction of the in-process second injection molding of moulding plastics respectively, has improved structural strength and the precision of moulding plastics, adopts twice injection moulding, has reduced the deformation degree of plastics part, has reduced the completion back of moulding plastics, and the size and the quantity of the appearance shrink and the inside shrinkage cavity of great wall thickness have improved the precision of moulding plastics of plastic gear.
Description
Technical Field
The utility model relates to an injection moulding technical field especially relates to a gear is moulded plastics to big wall thickness.
Background
Plastic gears are increasingly widely used due to the advantages of light weight, low noise, wear resistance, self-lubrication, low cost and the like, and the application field relates to various industries such as micro motors, electronic products, automobile accessories, household appliances, office supplies, toys, artware and the like. At present, the diameter of a large plastic gear with metal is generally larger than 60mm, the wall thickness is larger than 8mm, the conventional injection molding technology is mostly adopted, and a metal blank is directly placed into a mold for one-time injection molding.
However, the plastic gear has a complex structure, uneven wall thickness and anisotropy of the material, which causes uneven shrinkage of the material during injection molding, and the plastic gear has low injection molding precision due to deformation and large shrinkage cavity of the plastic part.
SUMMERY OF THE UTILITY MODEL
Based on above problem, the utility model aims to provide a gear of moulding plastics of big wall thickness, the precision of moulding plastics is high.
In order to achieve the purpose, the utility model adopts the following technical proposal:
a large wall thickness injection molded gear comprising:
the outer edge of the supporting wheel disc is provided with anti-moving teeth, and the anti-moving teeth are vertical to the axis of the supporting wheel disc;
the first injection molding piece and the supporting wheel disc are coaxially arranged, working gear teeth are arranged on the outer edge of the first injection molding piece, anti-rotation teeth are arranged on the inner edge of the first injection molding piece, and the anti-rotation teeth are parallel to the axis of the first injection molding piece;
and the second injection molding piece is arranged between the supporting wheel disc and the first injection molding piece and is respectively matched with the anti-moving teeth and the anti-rotating teeth.
As a preferable aspect of the large wall thickness injection-molded gear of the present invention, the anti-shift teeth are provided in plurality at intervals.
As the utility model discloses a big wall thickness injection molding gear's preferred scheme, it is a plurality of prevent moving the tooth and be two rows of interval distribution in support the outer fringe both sides of rim plate.
As the utility model discloses a big wall thickness injection molding gear's preferred scheme, every row prevent moving the tooth edge support the circumference evenly distributed of rim plate.
As a preferable aspect of the large wall thickness injection-molded gear of the present invention, the rotation preventing teeth are provided in plural at intervals.
As the utility model discloses a big wall thickness gear of moulding plastics preferred scheme, it is a plurality of prevent rotating the tooth edge the circumference evenly distributed of first injection molding.
As the utility model discloses a big wall thickness gear's preferred scheme of moulding plastics, be provided with a plurality of reinforcement floor on the support rim plate.
As the utility model discloses a big wall thickness gear of moulding plastics preferred scheme, it is a plurality of the reinforcement floor is followed support the circumference evenly distributed of rim plate.
As the utility model discloses a big wall thickness gear's preferred scheme of moulding plastics, the support rim plate is formed by metal preparation.
As the utility model discloses a big wall thickness gear's preferred scheme of moulding plastics, first injection molding with the second injection molding forms by plastics preparation.
The utility model has the advantages that:
the utility model provides a big wall thickness injection molding gear at first moulds plastics first injection molding and constitutes the appearance of gear, then places first injection molding and support rim plate with the axle center, moulds plastics the second injection molding between the two, adopts twice injection molding, has reduced the deformation degree of plastics part, has reduced after the completion of moulding plastics, and the size and the quantity of the appearance shrink and the inside shrinkage cavity of great wall thickness have improved the injection molding precision of plastic gear; the anti-moving teeth are arranged on the outer edge of the supporting wheel disc, so that the axial movement of the second injection molding part in the injection molding process is limited, the anti-rotating teeth are arranged on the inner edge of the first injection molding part, the circumferential rotation of the second injection molding part in the injection molding process is limited, and the structural strength and the injection molding precision are improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly described below, and 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 contents of the embodiments of the present invention and the drawings without creative efforts.
FIG. 1 is a schematic structural view of a large wall thickness injection molded gear according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of the support disk of FIG. 1;
FIG. 3 is a schematic view of the first injection molded part of FIG. 1.
In the figure:
1-supporting a wheel disc; 2-a first injection molded part; 3-a second injection molded part;
11-anti-moving teeth; 12-a reinforcing rib;
21-working gear teeth; 22-anti-rotation teeth.
Detailed Description
In order to make the technical problems, technical solutions and technical effects achieved by the present invention more clear, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1, the present embodiment provides a large wall thickness injection-molded gear including a support disk 1, a first injection-molded part 2, and a second injection-molded part 3. First injection molding 2 sets up with supporting 1 coaxial axle center of rim plate, and second injection molding 3 sets up between supporting rim plate 1 and first injection molding 2, and second injection molding 3 is used for connecting supporting rim plate 1 and first injection molding 2. It should be noted that, first, the first injection molding 2 is injected, then, the second injection molding 3 is injected between the first injection molding 2 and the supporting wheel disc 1, and the first injection molding 2 and the supporting wheel disc 1 are connected and cured. The injection molding is performed twice, so that the thickness of each injection molding is reduced, the deformation degree of the injection molding is reduced, the size and the number of the appearance shrinkage and the inner shrinkage holes of larger wall thickness after the injection molding is finished are reduced, and the injection molding precision is improved.
As shown in fig. 2, the outer edge of the supporting wheel disc 1 is provided with anti-moving teeth 11, and the anti-moving teeth 11 are perpendicular to the axis of the supporting wheel disc 1. Prevent moving tooth 11 through the outer fringe setting at support rim plate 1, above-mentioned second injection molding 3 with prevent moving tooth 11 cooperation, prevent moving tooth 11 and restricted the axial displacement of the in-process second injection molding 3 of moulding plastics, improved structural strength and the precision of moulding plastics.
Specifically, the anti-movement teeth 11 are provided in plurality at intervals. Optionally, a plurality of anti-moving teeth 11 are distributed on two sides of the outer edge of the supporting wheel disc 1 at intervals, so that when the axial movement of the second injection molding part 3 in the injection molding process is limited, the stress is uniformly distributed, and the number of shrinkage cavities after injection molding is finished is reduced. Optionally, each row of anti-moving teeth 11 are uniformly distributed along the circumferential direction of the supporting wheel disc 1, the stress is uniform, and the structural strength is high.
The supporting wheel disc 1 is provided with a plurality of reinforcing rib plates 12, so that the bearing capacity is increased. Optionally, the supporting wheel disc 1 is partially hollowed, so that the overall weight is reduced, and the cost is reduced. Alternatively, a plurality of reinforcing ribs 12 are uniformly distributed in the circumferential direction of the supporting disk 1 and are uniformly stressed.
More specifically, the supporting wheel disc 1 is made of metal, and the bearing capacity and the working performance of the supporting wheel disc 1 are improved due to the adoption of the metal material.
As shown in fig. 3, the first injection-molded part 2 is provided on its outer edge with working gear teeth 21 and on its inner edge with anti-rotation teeth 22, the anti-rotation teeth 22 being parallel to the axis of the first injection-molded part 2. Prevent rotating tooth 22 through the inner edge setting at first injection molding 2, above-mentioned second injection molding 3 and prevent rotating tooth 22 cooperation, prevent rotating tooth 22 and restricted the circumferential direction of the in-process second injection molding 3 of moulding plastics, improved structural strength and the precision of moulding plastics.
Specifically, the rotation preventing teeth 22 are provided in plurality at intervals. Optionally, the plurality of anti-rotation teeth 22 are uniformly distributed along the circumferential direction of the first injection molded part 2, and are stressed uniformly and structurally strong.
More specifically, first injection molding 2 and second injection molding 3 are all made by plastics, and are with low costs, light in weight, and the noise is low, are convenient for mould plastics.
The utility model provides a gear of moulding plastics of big wall thickness mainly divide into following step when manufacturing: firstly, a first injection molding part 2 is injected to form the appearance of the gear; then, the first injection molding part 2 and the supporting wheel disc 1 are coaxially arranged; finally, a second injection-molded part 3 is injected between the two.
The plastic gear is formed by injection molding twice, so that the deformation degree of a plastic part is reduced, the size and the number of the appearance shrinkage and the inner shrinkage holes with larger wall thickness after injection molding are reduced, and the injection molding precision of the plastic gear is improved. The anti-moving teeth 11 are arranged on the outer edge of the supporting wheel disc 1, so that the axial movement of the second injection molding part 3 in the injection molding process is limited, the anti-rotating teeth 22 are arranged on the inner edge of the first injection molding part 2, the circumferential rotation of the second injection molding part 3 in the injection molding process is limited, and the structural strength and the injection molding precision are improved.
It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments illustrated herein, but is capable of various obvious modifications, rearrangements and substitutions without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.
Claims (10)
1. A large wall thickness injection molded gear comprising:
the outer edge of the supporting wheel disc (1) is provided with anti-moving teeth (11), and the anti-moving teeth (11) are perpendicular to the axis of the supporting wheel disc (1);
the first injection molding part (2) is coaxially arranged with the supporting wheel disc (1), working gear teeth (21) are arranged on the outer edge of the first injection molding part (2), anti-rotation teeth (22) are arranged on the inner edge of the first injection molding part, and the anti-rotation teeth (22) are parallel to the axis of the first injection molding part (2);
and the second injection molding part (3) is arranged between the supporting wheel disc (1) and the first injection molding part (2) and is respectively matched with the anti-moving teeth (11) and the anti-rotating teeth (22).
2. An injection-molded gear with a large wall thickness according to claim 1, wherein the anti-moving teeth (11) are provided in plurality at intervals.
3. The large-wall-thickness injection-molded gear according to claim 2, wherein the plurality of anti-moving teeth (11) are distributed in two rows at intervals on both sides of the outer edge of the supporting wheel disc (1).
4. Large wall thickness injection molded gear according to claim 3, wherein each row of the anti-moving teeth (11) is evenly distributed along the circumference of the supporting disc (1).
5. A large wall thickness injection molded gear according to claim 1, wherein the rotation preventing teeth (22) are provided in plurality at intervals.
6. Large wall thickness injection-molded gear according to claim 5, characterized in that a plurality of said anti-rotation teeth (22) are evenly distributed along the circumference of the first injection-molded part (2).
7. Large wall thickness injection molded gear according to claim 1, characterized in that a plurality of reinforcing ribs (12) are provided on the supporting disk (1).
8. Large wall thickness injection-molded gear according to claim 7, characterised in that a plurality of said reinforcing ribs (12) are evenly distributed along the circumference of the supporting disk (1).
9. Large wall thickness injection molded gear according to any of claims 1 to 8, wherein the supporting disc (1) is made of metal.
10. Injection-molded gear wheel with large wall thickness according to any of claims 1 to 8, characterised in that the first injection-molded part (2) and the second injection-molded part (3) are both made of plastic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920234634.1U CN209925559U (en) | 2019-02-25 | 2019-02-25 | Large-wall-thickness injection molding gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920234634.1U CN209925559U (en) | 2019-02-25 | 2019-02-25 | Large-wall-thickness injection molding gear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209925559U true CN209925559U (en) | 2020-01-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920234634.1U Active CN209925559U (en) | 2019-02-25 | 2019-02-25 | Large-wall-thickness injection molding gear |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209925559U (en) |
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2019
- 2019-02-25 CN CN201920234634.1U patent/CN209925559U/en active Active
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