CN212643478U - Low-noise plastic steel arc tooth for electric vehicle transmission - Google Patents
Low-noise plastic steel arc tooth for electric vehicle transmission Download PDFInfo
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- CN212643478U CN212643478U CN202021046012.5U CN202021046012U CN212643478U CN 212643478 U CN212643478 U CN 212643478U CN 202021046012 U CN202021046012 U CN 202021046012U CN 212643478 U CN212643478 U CN 212643478U
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Abstract
The utility model relates to a low noise plastic steel arc tooth for electric vehicle transmission, which comprises an edge supporting part formed by a first material, a deformable contact part formed by a second material, a plurality of complete teeth and a limit unit, wherein the complete teeth and the limit unit are jointly formed by the edge supporting part and the deformable contact part at the periphery; in the complete teeth, the tooth profile curved surface of the teeth formed by the periphery of the deformable contact part protrudes out of the tooth profile curved surface of the teeth formed by the periphery of the edge supporting part; in the complete teeth, in an idle state, the periphery of the deformable contact part forms teeth stress, in the edge supporting part, a torque output state exists, the periphery of the deformable contact part forms teeth to deform, and the periphery of the edge supporting part forms teeth to gradually stress; and the limiting unit is used for fixing the edge supporting part and the deformable contact part without generating relative displacement. The utility model aims at overcoming the defect that prior art exists, provide a stable in structure, noise reduction effect is good low noise plastic steel curved tooth for the electric motor car transmission.
Description
Technical Field
The utility model belongs to the technical field of drive gear and specifically relates to a low noise plastic steel arc tooth is used in electric motor car transmission.
Background
The gear refers to a mechanical element with a gear on a rim which is continuously meshed to transmit motion and power, and the application of the gear in transmission has long appeared.
The gear for electric vehicle transmission is usually a nylon gear, a rigid gear or a nylon rigid composite gear. The nylon gear has good comprehensive properties such as flame retardance, mechanical property, heat resistance, abrasion resistance, chemical resistance, self-lubrication, low friction coefficient and the like, and is low in noise in the transmission process, but when the torque is too large, the gear body can be damaged, the gear can be broken seriously, and the power transmission is interrupted. The rigidity of a rigid gear perfectly satisfies the problem of torque strength, but the generated noise is much larger than that of a nylon gear.
The nylon rigid composite gear combines the good noise reduction performance of the nylon gear and the hardness of the rigid gear, and achieves the purpose of reducing noise by reducing the contact surface of the rigid material between the meshed gears, however, the structure only reduces the contact surface of the rigid material, and the rigid gears between the meshed gears are contacted all the time, so that the noise optimization effect is not ideal.
Therefore, the low-noise plastic steel arc teeth for the transmission of the electric vehicle are designed, so that only the nylon teeth are contacted between the meshing gears in the process that the transmission gear is in no-load and has no torque output; along with the increase of the output torque force, the nylon tooth part can deform along with the increase of the output torque force due to good plasticity, the nylon tooth part is gradually compressed, and the rigid gear starts to be gradually stressed. Above-mentioned structure not only at to a great extent noise reduction, can also effectively avoid the nylon gear to appear the condition of disconnected tooth at torsion increase in-process.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the defect that prior art exists, provide a stable in structure, noise reduction effect is good low noise plastic steel curved tooth for the electric motor car transmission.
Realize the utility model discloses the technical scheme of purpose is: a low-noise plastic steel arc tooth for electric vehicle transmission comprises an edge supporting part formed by a first material, a deformable contact part formed by a second material, a plurality of complete teeth formed by the edge supporting part and the deformable contact part together at the periphery, and a limiting unit;
in the complete teeth, the tooth profile curved surface of the teeth formed by the periphery of the deformable contact part protrudes out of the tooth profile curved surface of the teeth formed by the periphery of the edge supporting part;
in the complete teeth, in an idle state, the periphery of the deformable contact part forms teeth stress, in the edge supporting part, a torque output state exists, the periphery of the deformable contact part forms teeth to deform, and the periphery of the edge supporting part forms teeth to gradually stress;
and the limiting unit is used for fixing the edge supporting part and the deformable contact part without generating relative displacement.
Further, the deformable contact portion is sandwiched between the edge support portions by injection molding.
Further, the edge supporting part is made of rigid materials, and the deformable contact part is made of nylon materials.
Furthermore, the tooth top of the deformable contact part outer periphery forming tooth protrudes out of the tooth top of the edge support part outer periphery forming tooth.
Further, the tooth crest of the deformable contact portion outer periphery forming tooth is processed into a curved surface with respect to the tooth crest convex portion of the edge support portion outer periphery forming tooth.
Furthermore, the limiting unit comprises a plurality of hole grooves formed in two opposite inner side end faces of the edge supporting portion and limiting columns extending into the hole grooves in the injection molding process of the deformable contact portion.
Further, the plurality of holes on the two opposite inner side end faces of the edge supporting parts are distributed in a staggered mode.
After the technical scheme is adopted, the utility model discloses following positive effect has:
(1) in the process of no torque output of the utility model, only the nylon teeth are contacted between the meshing gears; along with the increase of the output torque force, the nylon tooth part can deform along with the increase of the output torque force due to good plasticity, the nylon tooth part is gradually compressed, and the rigid gear starts to be gradually stressed. Above-mentioned structure not only at to a great extent noise reduction, can also effectively avoid the nylon gear to appear the condition of disconnected tooth at torsion increase in-process.
Drawings
In order that the present invention may be more readily and clearly understood, the following detailed description of the present invention is given in conjunction with the accompanying drawings, in which
Fig. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic view of the explosion dispersal structure of the present invention;
fig. 3 is a front view of the present invention.
The reference numbers in the drawings are as follows: the edge supporting part 1, the deformable contact part 2, the complete tooth 3, the limiting unit 4, the hole groove 5 and the limiting column 6.
Detailed Description
(example 1)
Referring to fig. 1 to 3, the present invention includes an edge supporting portion 1 formed of a first material, a deformable contact portion 2 formed of a second material, a plurality of full teeth 3 formed by the edge supporting portion 1 and the deformable contact portion 2 together at the outer periphery, and a position limiting unit 4;
in the complete teeth 3, the tooth profile curved surface of the teeth formed by the periphery of the deformable contact part 2 protrudes out of the tooth profile curved surface of the teeth formed by the periphery of the edge supporting part 1;
in the complete tooth 3, in an idle load state, the periphery of the deformable contact part 2 forms tooth stress, and the periphery of the edge supporting part 1 forms tooth suspension;
in the complete teeth 3, a torque output state exists, the periphery of the deformable contact part 2 forms teeth to deform, and the periphery of the edge supporting part 1 forms teeth to gradually bear force.
And the limiting unit 4 is used for fixing the edge supporting part 1 and the deformable contact part 2 without generating relative displacement.
More specifically in this embodiment, the deformable contact portion 2 is sandwiched between the edge support portions 1 by injection molding. Specifically, the edge supporting portion 1 is made of rigid material, and the deformable contact portion 2 is made of nylon material. Wherein, the gear made of rigid material is used as the material of the edge supporting part 1, and a stable framework can be provided for the whole gear.
More specifically, in the present embodiment, the tips of the teeth formed on the outer periphery of the deformable contact portion 2 protrude beyond the tips of the teeth formed on the outer periphery of the edge support portion 1. The design that the tooth top of the deformable contact part 2 is higher than the tooth top of the periphery forming teeth of the edge supporting part 1 can further reduce the effective contact area between the periphery forming teeth of the edge supporting part 1, namely the contact area between the steel teeth before the periphery forming teeth of the deformable contact part 2 are completely deformed, thereby effectively reducing the contact noise between the steel teeth.
More specifically, in the present embodiment, the tooth tips of the outer periphery-forming teeth of the deformable contact portion 2 are machined to be arcuate surfaces with respect to the tooth tip projecting portions of the outer periphery-forming teeth of the edge support portion 1. Machining to a cambered surface can reduce friction between teeth, thereby reducing friction loss between gears.
More specifically, in this embodiment, the limiting unit 4 includes a plurality of hole slots 5 formed on two opposite inner side end surfaces of the edge supporting portion 1, and a limiting post 6 extending into the hole slot 5 during the injection molding process of the deformable contact portion 2. Wherein a plurality of apertures 5 on the two relative inboard terminal surfaces of edge supporting part 1 are crisscross the distribution, and this structure spacing performance is good, can effectively prevent to produce relative displacement between edge supporting part 1 and the contact site 2 that can deform.
See the table, for the utility model discloses relevant data that test in the design experimentation, concrete analysis is as follows:
under the no-load state (500-revolution output), the meshing transmission noise between the traditional steel gears is 75 decibels; the meshing transmission noise between the traditional nylon gears is 50 decibels; the improved plastic steel gear has the advantages that the contact area between rigid materials is reduced, the meshing transmission noise is 65 decibels, and the noise is lower than that of a pure steel gear and higher than that of a pure nylon gear; the contact surface of the meshing transmission between the plastic steel arc teeth is protruded out of the periphery of the deformable contact part 2 which forms the tooth profile curved surface by the periphery of the edge support part 1 to form the tooth profile curved surface, namely the nylon tooth surfaces of the plastic steel arc teeth are contacted, the steel teeth in the plastic steel arc teeth are suspended at the moment, the nylon teeth are stressed and do not deform under small stress, and the measured noise is 50 decibels.
Under the torque output state (8NM, 450-revolution output), the noise of the traditional steel gear is 80 decibels; the noise of the traditional nylon gear is 50 decibels; the noise of the improved plastic steel gear is 70 decibels; the nylon tooth surface of the plastic steel arc tooth is stressed and increased, the nylon tooth surface begins to be compressed when the stress of the nylon tooth surface is increased due to the deformability of the nylon tooth, contact nodes are arranged between the tooth surfaces of the steel tooth, the external acting force of the nylon tooth surface is increased while the nylon tooth surface is compressed, so that the main stress is still on the nylon tooth, and the measured noise is 55 decibels.
Under the torque output state (25NM, 300 revolutions output), the noise of the traditional steel gear is 85 decibels; 60 decibels of the traditional nylon gear; the noise of the improved plastic steel gear reaches 75 decibels at most; at the moment, the noise of the plastic steel arc teeth reaches 62 decibels to the maximum, specifically, the steel teeth are in complete contact, the nylon teeth have the largest deformation amount at the moment, and the outward acting force of the deformed curved surface is also the largest, so only a small part of acting force exists between the steel teeth and the steel teeth, the main stressed part of the steel teeth is still on the nylon teeth, the steel teeth share the remaining small part of acting force, meanwhile, due to the contact addition of the steel teeth, the noise of the plastic steel arc teeth reaches the maximum, but is only 62 decibels, and compared with the conventional plastic steel gears, the noise decibels are also reduced greatly.
Under the state of torque output (30NM, 200-revolution output), the noise of the traditional steel gear reaches up to 88 decibels; the traditional nylon gear is broken and fails due to insufficient material strength; the noise of the improved plastic steel gear reaches 75 decibels at most; at the moment, the plastic steel arc tooth noise is in a descending trend of 60 decibels at the node, relative to the maximum point (25NM, 300 revolutions output) of the plastic steel arc tooth, the rotating speed of the node is slowed, the rotating speed is one factor for reducing the noise of the node, the other factor is deformation of a curved surface part of the nylon tooth, the deformed curved surface still bears main stress outwards, the stress of the steel tooth part is reduced, and therefore the noise is also the reason for descending at the point.
In a torque output state (70NM, 100-revolution output), the rotating speed is reduced, the noise is reduced, and the noise of the traditional steel gear is 85 decibels; the noise of the improved plastic steel gear is 70 decibels; the noise of the plastic steel arc teeth is 55 decibels.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (7)
1. The utility model provides a low noise plastic steel curved tooth is used in electric motor car transmission which characterized in that: the edge support part comprises an edge support part (1) formed by a first material, a deformable contact part (2) formed by a second material, a plurality of complete teeth (3) and a limiting unit (4), wherein the complete teeth are formed by the edge support part (1) and the deformable contact part (2) together at the periphery;
in the complete teeth (3), the tooth profile curved surface of the teeth formed by the periphery of the deformable contact part (2) protrudes out of the tooth profile curved surface of the teeth formed by the periphery of the edge supporting part (1);
in the complete teeth (3), in an idle state, the periphery of the deformable contact part (2) forms teeth stress, and the periphery of the edge supporting part (1) forms teeth suspension;
in the complete teeth (3), a torque output state exists, teeth are formed on the periphery of the deformable contact part (2) to deform, and the teeth formed on the periphery of the edge supporting part (1) are gradually stressed;
and the limiting unit (4) is used for fixing the edge supporting part (1) and the deformable contact part (2) without generating relative displacement.
2. The low-noise plastic steel arc tooth for electric vehicle transmission according to claim 1, characterized in that: the deformable contact part (2) is clamped in the middle of the edge support part (1) through injection molding.
3. The low-noise plastic steel arc tooth for electric vehicle transmission according to claim 1, characterized in that: the edge supporting part (1) is made of rigid materials, and the deformable contact part (2) is made of nylon materials.
4. The low-noise plastic steel arc tooth for electric vehicle transmission according to claim 1, characterized in that: the tooth tops of the teeth formed on the periphery of the deformable contact part (2) protrude out of the tooth tops of the teeth formed on the periphery of the edge supporting part (1).
5. The low-noise plastic steel arc tooth for electric vehicle transmission according to claim 1, characterized in that: the tooth crest of the tooth formed on the periphery of the deformable contact part (2) is processed into an arc surface relative to the tooth crest convex part of the tooth formed on the periphery of the edge supporting part (1).
6. The low-noise plastic steel arc tooth for electric vehicle transmission according to any one of claims 1 to 5, characterized in that: the limiting unit (4) comprises a plurality of hole grooves (5) formed in two opposite inner side end faces of the edge supporting portion (1) and limiting columns (6) extending into the hole grooves (5) in the injection molding process of the deformable contact portion (2).
7. The low-noise plastic steel arc tooth for electric vehicle transmission according to claim 6, characterized in that: the edge supporting parts (1) are provided with a plurality of hole grooves (5) on two opposite inner side end faces in a staggered distribution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021046012.5U CN212643478U (en) | 2020-06-09 | 2020-06-09 | Low-noise plastic steel arc tooth for electric vehicle transmission |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021046012.5U CN212643478U (en) | 2020-06-09 | 2020-06-09 | Low-noise plastic steel arc tooth for electric vehicle transmission |
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| CN212643478U true CN212643478U (en) | 2021-03-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111536220A (en) * | 2020-06-09 | 2020-08-14 | 常州市佳博机械制造有限公司 | Low-noise plastic steel arc tooth for electric vehicle transmission |
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- 2020-06-09 CN CN202021046012.5U patent/CN212643478U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111536220A (en) * | 2020-06-09 | 2020-08-14 | 常州市佳博机械制造有限公司 | Low-noise plastic steel arc tooth for electric vehicle transmission |
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