CN217152879U - Gear structure more beneficial to gear injection molding and stable in tooth profile size and tooth flushing device - Google Patents
Gear structure more beneficial to gear injection molding and stable in tooth profile size and tooth flushing device Download PDFInfo
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- CN217152879U CN217152879U CN202220803430.7U CN202220803430U CN217152879U CN 217152879 U CN217152879 U CN 217152879U CN 202220803430 U CN202220803430 U CN 202220803430U CN 217152879 U CN217152879 U CN 217152879U
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Abstract
The utility model relates to a gear structure and a tooth punching device which are more beneficial to gear injection molding and have stable tooth profile size, comprising a cylindrical gear hub and a gear ring arranged at the radial outer side of the gear hub; the gear hub is axially provided with a gear central shaft, the gear hub and the gear ring are in concentric circles, the periphery of the gear ring is provided with gear teeth and a tooth socket, and the gear ring and the gear hub are connected through an I-beam; the utility model discloses design into the I shape structure with the gear, set up the main factor that the profile of tooth warp in the middle part of the gear profile of tooth, in the injection moulding process, because the existence of I-beam, the position of ring gear connection I-beam, the profile of tooth receives the risk that the I-beam contracts in, can contract to the gear center direction, and the profile of tooth at both ends is because of not receiving external force, the profile of tooth takes shape and keeps unanimous basically, guarantees that the both ends position profile of tooth of gear profile of tooth is unanimous, during operation, gear engagement is basically not influenced; the utility model discloses an improve gear structure, improve the deformation of gear teeth shape, noise reduction increases the gear life-span.
Description
Technical Field
The invention belongs to the technical field of tooth flushing device structures, and particularly relates to a gear structure which is more beneficial to gear injection molding and has stable tooth profile size.
Background
Most of the table-type tooth flushing devices sold in the market at present use a gear connecting rod transmission mechanism, and the working noise, the output water pressure and the flow of the tooth flushing device and the service life of the gear are directly influenced by the tooth profile integrity of the gear.
The existing gear structure A in FIG. 4 and the gear structure B in FIG. 5 have two problems that are not beneficial to tooth profile during injection molding:
in the arrangement of the beam in the figure 4, in the process of gear injection molding, due to the shrinkage characteristic of materials, the position I is subjected to the force of the beam due to the existence of the beam and shrinks towards the center of the gear, so that the size of the integral tooth profile at the position I is smaller than that at the position II, the phenomena of small upper part and large lower part are caused, and the integral tooth profile is incompletely meshed when a machine moves.
The reinforcing ribs arranged by arrows in the figure 5 can cause uneven shrinkage and tooth profile deformation problems similar to those of the beam in the figure 1.
Disclosure of Invention
In order to solve the problems, the invention discloses a gear structure which is more beneficial to gear injection molding and has stable tooth profile size, so that the tooth profile deformation of a gear can be improved, the noise is reduced, and the service life of the gear is prolonged.
In order to achieve the purpose, the technical scheme of the invention is as follows:
the invention provides a gear structure which is more beneficial to gear injection molding and has stable tooth profile size, comprising a cylindrical gear hub and a gear ring arranged on the radial outer side of the gear hub; the gear hub is axially provided with a gear central shaft, the gear hub and the gear ring are in concentric circles, the periphery of the gear ring is provided with gear teeth and a tooth socket, and the gear ring and the gear hub are connected through an I-beam; the I-shaped beam is in an annular plate structure, is annularly arranged at the axial center of the inner wall of the gear ring and is connected to the peripheral surface of the gear hub.
Furthermore, the thickness of the I-shaped beam is smaller than the axial height of the gear ring, so that the cost can be saved.
Further, a first balance piece is arranged on the upper surface of the I-shaped beam on the radially outer side of the gear wheel hub, the first balance piece is cylindrical, the gear wheel hub is an inscribed circle of the first balance piece, and a second balance piece and a balance gear structure are arranged in the direction opposite to the first balance piece on the upper surface of the I-shaped beam.
Further, a third balance piece and a fourth balance piece are arranged on the lower surface of the I-shaped beam on the radial outer side of the gear wheel hub, and a gear structure is balanced.
Furthermore, the centers of gravity of the first balance piece and the second balance piece are symmetrically arranged along two sides of the gear hub, so that the whole center of the gear is on the axis of the gear hub, and the gear central shaft or the gear hub is prevented from being worn after long-term use.
Furthermore, the centers of gravity of the third balance piece and the fourth balance piece are symmetrically arranged along two sides of the gear hub, so that the integral center of the gear is on the axis of the gear hub, and the abrasion of the gear central shaft or the gear hub after long-term use is avoided.
Further, the gear structure is formed by injection molding of a resin material, so that the manufacturing cost of the gear can be reduced.
The invention also provides a tooth flushing device which is provided with the gear structure which is more beneficial to gear injection molding and has stable tooth profile size.
The invention has the beneficial effects that:
the utility model discloses design into the I shape structure with the gear, set up the leading factor that the profile of tooth warp at the gear profile of tooth's middle part, at the injection moulding in-process, because the existence of I-beam, the position of I-beam is connected to the ring gear, the profile of tooth receives the risk that contracts in the I-beam, can shrink to gear center direction, and the profile of tooth at both ends is because of not receiving external force, and profile of tooth takes shape and keeps unanimous basically, guarantees that the both ends position profile of tooth of gear profile of tooth is unanimous, and during operation, gear engagement is not influenced basically.
The utility model discloses an improve gear structure, improve the deformation of gear teeth shape, noise reduction increases the gear life-span.
Drawings
FIG. 1 is a schematic structural view of a gear structure of the present invention, wherein (a) is a perspective view and (b) is a sectional view;
FIG. 2 is a schematic view of the inverted perspective structure of FIG. 1 (a);
FIG. 3 is a perspective cross-sectional view of the gear structure of the present invention;
FIG. 4 is a schematic structural view of a prior art gear structure A, wherein (a) is a perspective view and (b) is a sectional view;
FIG. 5 is a schematic structural view of a prior art gear structure B, wherein (a) is a perspective view and (B) is a sectional view;
list of reference symbols:
1. gear teeth; 2. a tooth socket; 3. a ring gear; 4. a gear hub; 5. a gear central shaft; 6. an I-beam; 7. a first balance member; 8. a second balance member; 9. a third balance member; 10. and a fourth balance member.
Detailed Description
The present invention will be further illustrated with reference to the accompanying drawings and detailed description, which will be understood as being illustrative only and not limiting in scope.
The invention provides a gear structure which is more beneficial to gear injection molding and has stable tooth shape size, comprising a cylindrical gear hub 4 and a gear ring 3 arranged at the radial outer side of the gear hub 4; a gear central shaft 5 is axially arranged on the gear hub 4, the gear hub 4 and the gear ring 3 are concentric, the periphery of the gear ring 3 is provided with a gear tooth 1 and a gear groove 2, and the gear ring 3 and the gear hub 4 are connected through an I-shaped beam 6; the I-beam 6 is of an annular plate structure, and the I-beam 6 is annularly arranged at the axial center of the inner wall of the gear ring 3 and connected to the peripheral surface of the gear hub 4; the thickness of the I-beam 6 is smaller than the axial height of the gear ring 3; a first balance piece 7 is arranged on the upper surface of an I-beam 6 on the radial outer side of the gear hub 4, the first balance piece 7 is cylindrical, the gear hub 4 is an inscribed circle of the first balance piece 7, a second balance piece 8 is arranged in the direction opposite to the first balance piece 7 on the upper surface of the I-beam 6, the gravity centers of the first balance piece 7 and the second balance piece 8 are symmetrically arranged along the two sides of the gear hub 4, so that the integral center of the gear is on the axis of the gear hub 4, and the gear structure is balanced; the lower surface of an I-shaped beam 6 at the radial outer side of the gear hub 4 is provided with a third balancing piece 9 and a fourth balancing piece 10, the gravity centers of the third balancing piece 9 and the fourth balancing piece 10 are symmetrically arranged along two sides of the gear hub 4, so that the integral center of the gear is on the axis of the gear hub 4, and the gear structure is balanced; the gear structure is made of any material, and the gear structure is formed by injection molding of a resin material in the embodiment.
It should be noted that the above-mentioned contents only illustrate the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and it is obvious to those skilled in the art that several modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations fall within the protection scope of the claims of the present invention.
Claims (8)
1. A gear structure which is more beneficial to gear injection molding and has stable tooth profile size is characterized by comprising a cylindrical gear hub and a gear ring arranged on the radial outer side of the gear hub; the gear hub is axially provided with a gear central shaft, the gear hub and the gear ring are in concentric circles, the periphery of the gear ring is provided with gear teeth and a tooth socket, and the gear ring and the gear hub are connected through an I-beam; the I-beam is of an annular plate structure, is annularly arranged at the axial center of the inner wall of the gear ring and is connected to the peripheral surface of the gear hub.
2. The structure of claim 1, wherein the thickness of the i-beam is less than the axial height of the gear ring.
3. The gear structure of claim 1, wherein the gear hub has a first balancer on an upper surface of the i-beam radially outside the gear hub, the first balancer is cylindrical, the gear hub is inscribed on the first balancer, and a second balancer is disposed on an upper surface of the i-beam in a direction opposite to the first balancer.
4. The gear structure for facilitating gear injection molding and stabilizing tooth profile dimension as claimed in claim 3, wherein the gear hub is provided with a third balance member and a fourth balance member on the lower surface of the radially outer H-beam.
5. The structure of claim 3, wherein the centers of gravity of the first and second balance members are symmetrically located along both sides of the gear hub.
6. The structure for facilitating injection molding of gears and stabilizing the dimension of the tooth profile as claimed in claim 4, wherein the centers of gravity of the third and fourth balance members are symmetrically located along both sides of the gear hub.
7. A gear structure with more favorable gear injection molding and stable tooth profile dimension according to any one of claims 1 to 6, characterized in that the gear structure is injection molded from a resin material.
8. A tooth punching device, characterized in that the tooth punching device is provided with a gear structure which is more beneficial to gear injection molding and has stable tooth shape dimension as claimed in any one of claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220803430.7U CN217152879U (en) | 2022-04-08 | 2022-04-08 | Gear structure more beneficial to gear injection molding and stable in tooth profile size and tooth flushing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220803430.7U CN217152879U (en) | 2022-04-08 | 2022-04-08 | Gear structure more beneficial to gear injection molding and stable in tooth profile size and tooth flushing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217152879U true CN217152879U (en) | 2022-08-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220803430.7U Active CN217152879U (en) | 2022-04-08 | 2022-04-08 | Gear structure more beneficial to gear injection molding and stable in tooth profile size and tooth flushing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217152879U (en) |
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2022
- 2022-04-08 CN CN202220803430.7U patent/CN217152879U/en active Active
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