CN110430985A - Plastic gear and gear mechanism - Google Patents
Plastic gear and gear mechanism Download PDFInfo
- Publication number
- CN110430985A CN110430985A CN201880018068.9A CN201880018068A CN110430985A CN 110430985 A CN110430985 A CN 110430985A CN 201880018068 A CN201880018068 A CN 201880018068A CN 110430985 A CN110430985 A CN 110430985A
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- Prior art keywords
- gear
- internal
- carbon
- external tooth
- plastic
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/06—Fibrous reinforcements only
- B29C70/10—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres
- B29C70/12—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of short length, e.g. in the form of a mat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/02—Toothed members; Worms
- F16H55/06—Use of materials; Use of treatments of toothed members or worms to affect their intrinsic material properties
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Thermal Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Gears, Cams (AREA)
- Retarders (AREA)
- Moulding By Coating Moulds (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The plastic gear of one embodiment of the present invention is made of the mixing material of resin material and carbon material, and the carbon material is the carbon fiber with 100 μm of length below.
Description
Technical field
The present invention relates to plastic gears and gear mechanism.
Background technique
In the past, in the mutual situation of gear for having used metal material, because caused by backlash vibration or noise become ask
Topic.Therefore, in order to reduce because of backlash caused by vibrate and noise, in recent years it has been proposed that using the gear of resin material.
In addition, in order to transmit biggish stress, it is desirable that improve the durability and wear resistance of plastic gear.As for mentioning
The durability of high resin gear and a means of wear resistance, such as patent document 1 have studied in resin material like that
The method for mixing reinforcing fiber to improve durability, wear resistance.
Existing technical literature
Patent document
Patent document 1: Japanese table WO2004/083015 bulletin public again
Summary of the invention
Subject to be solved by the invention
But have the following problems: in the case where gear is small-sized, in injection moulding, reinforcing fiber does not spread gear
Each corner of construction, the front end portion etc. of tooth is unable to get reinforcing effect brought by reinforcing fiber.In addition, there is also following
Problem: when the length of reinforcing fiber is longer, for example, reinforcing fiber can mutually wind each other and generate uneven or be easy
Gap is generated in resin material, size changing amount when being heat-shrinked in thermmohardening changes according to direction.
In addition, the performance of gear configurations is possible to when the precision due to the mutual engagement of gear causes to generate backlash
It reduces.Especially in the packaged reducer of cycloidal fashion, delay is generated in the transmitting of driving force sometimes or can not be into
The quick movements such as the instantaneous stopping of row.Therefore, it is necessary to the higher dimensional accuracies of each gear.
In view of the above problems, the first purpose of one embodiment of the present invention is, provides following plastic gear and has
The gear mechanism of the plastic gear: the plastic gear is by containing reinforcing fiber, even small-sized, it may have adequately resistance to
Long property and wear resistance, and dimensional accuracy is higher.
Means for solving the problems
The plastic gear of one embodiment of the present invention is made of the mixing material of resin material and carbon material, the carbon material
It is the carbon fiber with 100 μm of length below.
Invention effect
According to one method of the present invention, following plastic gear and the gear mechanism with the plastic gear are capable of providing
Structure: even the plastic gear is small-sized, it may have sufficient durability and wear resistance, and dimensional accuracy is higher.
Detailed description of the invention
Fig. 1 is a part for showing the packaged reducer 100 that plastic gear of the invention has been used as to internal-gear 10
The figure of structure.
Fig. 2 is the figure for showing internal-gear 10.
Fig. 3 is to show carbon fiber 12 with the figure of the irregular situation towards dispersion, is the enlarged drawing of an internal tooth.
Fig. 4 is the figure for showing external tooth gear 20.
Fig. 5 is the figure for showing the situation of direction dispersion of the carbon fiber 12 with rule, is the enlarged drawing of an internal tooth.
Fig. 6 is the enlarged drawing of a part on the surface of the internal tooth 13 of the internal-gear 10 before showing use.
Fig. 7 is the enlarged drawing of a part on the surface of the internal tooth 13 of the internal-gear 10 before showing use.
Fig. 8 is the enlarged drawing for the state that external tooth gear when showing use is engaged with internal-gear 10.
Specific embodiment
Plastic gear of the invention is made of the mixing material of resin material and carbon material.As carbon material, carbon fiber is used
Dimension, is mixed with a large amount of carbon fiber in resin material.Such plastic gear can be for example preferably used as shown in Figure 1
The internal-gear 10 of packaged reducer 100.
Hereinafter, being illustrated referring to structure of the attached drawing to the packaged reducer of embodiments of the present invention.In addition, of the invention
Range embodiment not limited to the following, can arbitrarily change within the scope of the technical idea of the present invention.In addition, with
Under attached drawing in, for easy understanding each structure, make sometimes actual construction from each construction scale bar or quantity etc. it is different.
In addition, in the accompanying drawings, suitably showing XYZ coordinate system as three-dimensional cartesian coordinate system.In XYZ coordinate system, Z axis side
To being the direction parallel with the 1st central axis J1 shown in FIG. 1, the axial direction of the 2nd central axis J2.X-direction is and Z-direction
Vertical direction is the left and right directions of Fig. 1.Y direction is the direction vertical with X-direction and the two directions of Z-direction, is
The up and down direction of Fig. 1.
In addition, in the following description, by direction (the Z axis side parallel with the 1st central axis J1 and the 2nd central axis J2
To) referred to as " axial direction ", it referred to as " radial direction " by the radial direction centered on the 1st central axis J1 or the 2nd central axis J2, will be with
Circumferential direction centered on 1st central axis J1 or the 2nd central axis J2, i.e. around the 1st central axis J1's or the 2nd central axis J2
Direction is referred to as " circumferential direction ".
(packaged reducer)
Fig. 1 is a part for showing the packaged reducer 100 that the plastic gear of embodiment has been used as to internal-gear 10
Structure figure.As shown in Figure 1, packaged reducer (gear mechanism) 100 at least has internal-gear 10, external tooth gear 20, axis 7
And multiple fulcrum posts 8.Axis 7 is the input shaft of packaged reducer 100, which includes shaft body (not shown), along the 1st
Central axis J1 extends；And eccentric part 7B, it is set to the front end of shaft body, is extended along the 2nd central axis J2.
(internal-gear 10)
Fig. 2 is the figure for showing internal-gear 10.Internal-gear 10 is an embodiment of plastic gear of the invention.Such as
Shown in Fig. 1 and Fig. 2, internal-gear (plastic gear) 10 is made of a component, which has with the 1st central axis J1
Centered on the fixed part 10B that extends of cylindric internal-gear main body 10A and a part from internal-gear main body 10A.In
It is provided on the inner peripheral surface 10a of internal-gear main body 10A from inner peripheral surface 10a towards radial outside multiple internal tooths 13 outstanding.In
Circumferentially adjacent internal tooth 13 is provided with the interior inter-tooth slots 14 towards radially inner side (inner peripheral surface 10a) recess each other.Internal tooth
13 and interior inter-tooth slots 14 alternately exist on the direction around the 1st central axis J1.The tip diameter example of internal-gear 10
For example 2mm or more and 12mm or less.
As shown in Figure 1, internal-gear main body 10A surrounds the radial outside of external tooth gear 20.Internal-gear main body 10A's is interior
Tooth 13 is opposed with the external tooth 22 of external tooth gear 20, and according to the wobbling action of external tooth gear 20 and in the circumferential successively partly
Engagement.
(material of internal-gear)
Fig. 3 is to show the carbon fiber 12 in the structure of present embodiment to be with the figure of the irregular situation towards dispersion
The enlarged drawing of one internal tooth.
Internal-gear 10 is the plastic gear of an embodiment of the invention.Internal-gear 10 will include carbon material
Plastic gear of the reinforced resin as material.As the material of internal-gear 10, base material uses resin material 11 (Fig. 3), as
For the additive of base material, carbon fiber (carbon material) 12 (Fig. 3) is used.
For resin material 11 used in base material, select that mouldability is excellent, high molecular material of high mechanical strength.As
Specific resin material 11, for example, can enumerate from by PEEK (the Poly ether as crystalline superengineering plastics
Ether ketone) polyether-ether-ketone resin), LCP (Liquid Cristal Polymer liquid crystal polymer), PPS (Poly
Phenylene Sulfide Resin polyphenylene sulfide) or it is semi-aromatic nylon (PA4T, PA6T, PA9T, PA10T), poly-
One or more the material selected in the group of the polyamide resins such as amide 46 (PA46) composition.
It is preferable to use the carbon fibers 12 of high-intensitive and excellent in wear resistance PAN system for carbon fiber 12.As carbon fiber 12,
For example, selecting average aspect ratio for 5 or more and a length of 100 μm fine carbon fibers below of 20 or less, average fiber.More
For body, it can choose that average aspect ratio is 10 or less, average fiber is 80 μm a length of, avarage fiber diameter is 5 μm~7 μm short
Fiber.For the purpose of special requirement intensity, the carbon fiber 12 of anisotropic pitch system is also can be used in carbon fiber 12.As carbon
Fiber 12, for example, selecting average aspect ratio for 5 or more and a length of 100 μm fine carbon fibers below of 15 or less, average fiber
Dimension.More specifically, can choose average aspect ratio be 10 or less, average fiber is 80 μm a length of, avarage fiber diameter be 7 μm~
11 μm of staple fiber.
Here, average aspect ratio refers to for the multiple carbon fibers 12 for being included in the range of regulation, to by carbon fiber 12
The length radially vertical with length direction be set as diameter r (μm), be set as the length on the length direction of carbon fiber 12
Value obtained from L/r ratio when long L (μm) carries out averagely.One aspect ratio of fiber is can be by observing carbon fiber 12, inciting somebody to action
What the length of carbon fiber 12 was calculated divided by diameter.
The length of carbon fiber 12 is able to use optical microscopy or electron microscope to measure.For example, using sweep type electricity
Sub- microscope (SEM) selects such as 100 length for 100 μm of arbitrary carbon fibers 12 below, measures the length of the carbon fiber 12
Degree and diameter.The aspect ratio that 100 carbon fibers 12 can be sought according to the length and diameter measured, calculates average aspect ratio
Average value as these aspect ratios.
Carbon fiber 12 after miniaturization is the lesser fiber of aspect ratio, therefore relative to resin material 11 with extraordinary
Dispersibility is distributed in resin material 11 with uniform state.In addition, carbon fiber 12 is in resin due to smaller in length and breadth
Dispersion direction in material 11 will not show anisotropy, as shown in FIG. 3 with irregular court in injection-molded article
To randomly dispersing.The high and high-intensitive internal-gear 10 of dimensional accuracy has been obtained as a result,.
In the present embodiment, (the enhancing as carbon material containing 20 volume of volume %~70 % in above-mentioned base material
Material) carbon fiber 12.More preferably 30 volume of volume %~60 %.Further preferably 50 volume %.Carbon fiber 12 contains
Amount is unable to get desired reinforcing effect less than 20 volume %.On the other hand, the content of carbon fiber 12 is more than 70 volume %
If, the amount of resin that fiber and fiber are connected is insufficient, it is therefore possible to generate gap to the mouldability of gear, ruler
Very little precision affects.
(external tooth gear 20)
Fig. 4 is the figure for showing external tooth gear 20.External tooth gear 20 is cycloid gear.As shown in Figure 1 and Figure 4, external tooth gear
20 in the substantially annulus plate radially expanded from the 2nd central axis J2.It is provided in the periphery of external tooth gear 20 towards radial
Outside multiple external tooths 22 outstanding.It is recessed in addition, being provided between circumferentially adjacent external tooth 22 towards radially inner side
Outer inter-tooth slots 23.On the direction around the 2nd central axis J2, external tooth 22 and outer inter-tooth slots 23 alternately exist.External tooth tooth
The tip diameter of wheel 20 is, for example, 2mm or more and 12mm or less.
External tooth gear 20 has the shaft insertion hole 24 penetrated through along axial direction (Z-direction) in center portion.Shaft insertion hole 24 is
Axis hole by the eccentric part 7B bearing of the axis 7 of the Fig. 1 extended along the 2nd central axis J2 for that can rotate.Shaft insertion hole 24 is
Sliding bearing maintains lubricating oil 19 (Fig. 8) in inside.
External tooth gear 20 has multiple through holes 25 around shaft insertion hole 24.Multiple through holes 25 are to radial outside
Position far from shaft insertion hole 24 is equally spaced configured along the circumferential direction centered on the 2nd central axis J2.In addition, each through hole
Distinguish identical in 25 position radially.
In the present embodiment, through hole 25 is provided with 10 or so, but quantity is without being limited thereto.Along axial (Z-direction)
The shape for the through hole 25 observed is circular shape.Multiple through holes 25 are sliding bearings, maintain lubricating oil 19 in inside
(Fig. 8).
Respectively inserted with fulcrum post 8 shown in FIG. 1 in multiple through holes 25.The internal diameter of through hole 25 is greater than fulcrum post 8
Outer diameter.The outer peripheral surface 8b of fulcrum post 8 and the inner peripheral surface 25a inscribe of through hole 25.The freedom of the limitation external tooth gear 20 of fulcrum post 8
Rotation swings external tooth gear 20 around the 1st central axis J1.The output axis connection of fulcrum post 8 and packaged reducer 100.Outside
Gear 20 is engaged with the internal-gear 10 for being configured at its radial outside.
(material of external tooth gear 20)
As the material of external tooth gear 20, select that mouldability is excellent, high molecular material of high mechanical strength.As specific
Resin material, for example, can enumerate from by PEEK (the Poly ether ether as crystalline superengineering plastics
Ketone) polyether-ether-ketone resin), LCP (Liquid Cristal Polymer liquid crystal polymer), PPS (Poly Phenylene
Sulfide Resin polyphenylene sulfide) or semi-aromatic nylon (PA4T, PA6T, PA9T, PA10T), polyamide 46
(PA46) one or more the material selected in the group of polyamide resins composition such as.
It is preferred that containing carbon material in external tooth gear 20.As the material of external tooth gear 20, by using in above-mentioned tree
It is added to the reinforcing material of spherical amorphous carbon (not shown) in rouge material, can be improved the wear resistance of external tooth gear 20.
As spherical amorphous carbon, preferably average aspect ratio is 2 carbon molecules below.
Material identical with the base material of external tooth gear 20 can be used in the base material of above-mentioned internal-gear 10, also can be used
The material different from the base material of external tooth gear 20.
In the packaged reducer 100 of present embodiment, for example, when axis 7 shown in FIG. 1 is revolved around the 1st central axis J1
When turning, in the inner peripheral surface 25a of through hole 25 and the outer peripheral surface 8b of fulcrum post 8 of the external tooth gear 20 supported by the eccentric part of axis 7
The position cut changes, while external tooth gear 20 is swung radially.By the swing, the external tooth 22 of external tooth gear 20 with it is interior
The position that the internal tooth 13 of gear 10 engages changes in the circumferential.Here, whenever axis 7 is rotated around the 2nd central axis J2
One circle, the position of engagement deviates a tooth in the circumferential.As a result, the output shaft linked with fulcrum post 8 is for example with the 1/ of axis 7
30 speed is rotated.The movement of above-mentioned packaged reducer 100 is an example, is also possible to carry out the structure of other movements.
Fig. 5 is the figure for showing the situation that carbon fiber 12 is dispersed in the existing structure with the direction of rule, is an internal tooth
Enlarged drawing.Here, in existing internal-gear 90, as shown in figure 5, being more than added with fibre length in resin material 11
100 μm of longer carbon fiber 92.When the carbon fiber 92 in resin material 11 added with a large amount of fibre length being more than 100 μm
When, carbon fiber 92 is possible to be orientated along the flowing of the resin material 11 when being injection moulded with the direction of rule, is easy to generate
Crack 91 shown in fig. 5.In this way, when the length of carbon fiber 92 is longer, carbon fiber 92 can along the flowing of resin material 11 and
Orientation etc. in the flowing direction, generates shrinkage anisotropy according to the flow regime of resin material 11, the ruler of internal-gear 90
Very little precision reduces, it is difficult to become target size.In addition, when the length of carbon fiber 92 is longer, carbon fiber 92 can it is wrapped around one another and
It generates carbon fiber 92 uneven or is easy to generate gap in resin material 11, the ruler when carrying out thermmohardening, when thermal contraction
Very little variable quantity changes according to direction.In addition, if can be led when the internal residual of internal-gear 90 after fabrication has gap
Cause the strength reduction of internal-gear 90.
In contrast, in the present embodiment, as shown in figure 4, being by being added to fibre length in resin material 11
100 μm of shorter carbon fibers 12 below, eliminate unfavorable condition as described above.As present embodiment, fibre length
The outflow direction of resin material 11 when no matter shorter carbon fiber 12 is injection moulded how in resin material 11 not advise
Direction dispersion then.It, will not be in resin material 11 in injection moulding since carbon fiber 12 is not easy to wind each other
Anisotropy is shown on the dispersion direction of carbon fiber 12, the uneven of carbon fiber 12 will not be generated or in resin material 11
Generate gap.Size changing amount when therefore, along with the thermal contraction of hardening is impartial, can mold the high internal tooth of dimensional accuracy
Gear 10.
In addition, since in injection moulding, carbon fiber 12 is throughout each corner of internal-gear 10, in multiple internal tooths
13 respective front end portions can also obtain sufficient reinforcing effect, and the durability of internal-gear 10 improves, will not be in each internal tooth 13
Middle generation crack.Especially since internal-gear 10 is engaged with the external tooth gear 20 as cycloid gear, therefore it is required that durability
With higher dimensional accuracy, this both sides can be realized in the present embodiment.
In addition, by adding carbon fiber 12 in resin material 11, compared with the case where being only resin material 11, thermal expansion
Coefficient reduces.Therefore, the change in size of the internal-gear 10 caused by generating heat when being able to suppress due to using.
In the packaged reducer 100 of the present embodiment with above-mentioned internal-gear 10 and external tooth gear 20, do not allow
Backlash caused by being also easy to produce because of the accuracy of mesh of internal-gear 10 and external tooth gear 20.Therefore, from the defeated of packaged reducer 100
The transmitting for entering the driving force of axial output shaft will not generate delay, be able to carry out the quick movements such as instantaneous stopping.
In addition, in the present embodiment, not only internal-gear 10, external tooth gear 20 are also formed by fibre reinforced materials.By
Compressing force and shearing force both sides are born in external tooth gear 20, therefore durability and sliding property are critically important.Therefore, by resinous wood
Carbon material is added in material 11, can be improved the durability and wear resistance of external tooth gear 20.
Fig. 6 is the enlarged drawing of a part on the surface of the internal tooth 13 of the internal-gear 10 before showing use.Fig. 7 is to show to make
The enlarged drawing of a part on the surface of the internal tooth 13 of the internal-gear 10 after.Fig. 8 be external tooth gear 20 when showing use with
The enlarged drawing for the state that internal-gear 10 engages.
In packaged reducer 100, external tooth gear 20 is engaged with internal-gear 10, thus in internal-gear 10 and external tooth tooth
Friction is generated between wheel 20, the flank of tooth of surface, that is, internal tooth 13 of internal-gear 10 can be gradually worn out.Mill is generated in internal-gear 10
When damage, the resin material 11 of flexible relative is preferentially ground, therefore a part of harder carbon fiber 12 is from the table of each internal tooth 13
It is prominent to face out side.The higher carbon fiber 12 of the hardness being embedded in resin material 11 as shown in FIG. 6 can as shown in FIG. 7
Surface is appeared in, gap 15 is generated between carbon fiber 12 and resin material 11.Then, as shown in figure 8, being formed in each internal tooth
Lubricating oil 19 is maintained by capillarity in gap 15 on 13 surface.
On the other hand, the surface of 20 side of external tooth gear is also gradually worn out.In the same manner as internal-gear 10, in external tooth gear 20
In be also that the carbon material being embedded in resin material 11 appears in the surface of each external tooth 22, resin material 11 and carbon fiber 12 it
Between generate gap 15.As a result, as shown in figure 8, also by capillary in the gap 15 on the surface that these are formed in each external tooth 22
Phenomenon and maintain lubricating oil 19.In addition, internal-gear 10 with and internal-gear 10 a part engage in the state of outside
In gap 16 between gear 20, lubricating oil 19 is temporarily maintained also by capillarity.
In this way, by maintaining lubricating oil 19 in each gap 15,16, the sliding property of external tooth gear 20 is improved, it is suppressed that
The fatigue caused by friction, each gear 10,20 long lifetimes can be made.
As described above, the packaged reducer 100 of present embodiment have the internal-gear 10 comprising carbon fiber 12 and comprising
The external tooth gear 20 of spherical amorphous carbon, even therefore obtained small-sized, it may have durability and wear resistance and
The high gear configurations of dimensional accuracy, so as to obtain the packaged reducer 100 of high reliablity.
More than, an embodiment of the invention is illustrated, but each structure in embodiment and they
Combination etc. is an example, can carry out without departing from the spirit and scope of the invention structure it is additional, omit, displacement and other
Change.In addition, the present invention is not limited to embodiments.
For example, in the above-described embodiment, in internal-gear 10, carbon fiber 12 is only mixed in resin as carbon material
In material 11, however, you can also not only be mixed in resin material 11 by carbon fiber 12, also by spherical amorphous carbon.Carbon fiber 12
It relative to the adding rate of resin material 11 is to consider the mouldability and dimensional accuracy etc. of internal-gear 10 with spherical amorphous carbon
And suitably select.
In this way, by the way that not only mixed carbon fibre is also mixed with spherical amorphous carbon, resin material in resin material 11
The density of carbon material in 11 improves.Along with this, can be improved the intensity of external tooth gear 20, therefore further improve external tooth
The durability and wear resistance of gear 20.
In addition, being only mixed with spherical amorphous carbon in resin material 11, but in addition to spherical in external tooth gear 20
It, can also be with mixed carbon fibre 12 other than amorphous carbon.
Label declaration
10: internal-gear (plastic gear)；11: resin material；12: carbon fiber (carbon material)；20: external tooth gear；100:
Packaged reducer (gear mechanism).
Claims (8)
1. a kind of plastic gear, wherein
The plastic gear is made of the mixing material of resin material and carbon material, and the carbon material is below with 100 μm
The carbon fiber of length.
2. plastic gear according to claim 1, wherein
The plastic gear is internal-gear, is had to radial outside multiple internal tooths outstanding.
3. plastic gear according to claim 1 or 2, wherein
The carbon material is in the resin material with irregular towards dispersion.
4. plastic gear according to claim 2 or 3, wherein
The outer diameter of the plastic gear is 12mm or less.
5. according to claim 1 to plastic gear described in any one in 4, wherein
The average aspect ratio of the carbon material is 5 or more and 15 or less.
6. according to claim 1 to plastic gear described in any one in 5, wherein
The containing ratio of the carbon material in the resin material is in the range of the 20 weight % of weight %~60.
7. according to claim 1 to plastic gear described in any one in 6, wherein
The plastic gear also includes spherical amorphous carbon.
8. a kind of gear mechanism, wherein
The gear mechanism is that using plastic gear described in any one in claim 1 to 7 as internal-gear and have
There is the gear mechanism of the external tooth gear for the radially inner side for being configured at the internal-gear, the external tooth gear is by resin material and ball
The mixing material of the amorphous carbon of shape is constituted.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017-062126 | 2017-03-28 | ||
| JP2017062126 | 2017-03-28 | ||
| PCT/JP2018/007891 WO2018180185A1 (en) | 2017-03-28 | 2018-03-01 | Resin gear and gear mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110430985A true CN110430985A (en) | 2019-11-08 |
Family
ID=63675426
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201880018068.9A Pending CN110430985A (en) | 2017-03-28 | 2018-03-01 | Plastic gear and gear mechanism |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPWO2018180185A1 (en) |
| CN (1) | CN110430985A (en) |
| WO (1) | WO2018180185A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102021130960B4 (en) | 2020-11-27 | 2023-07-13 | Sumitomo Heavy Industries, Ltd. | RESIN GEAR AND GEAR DEVICE |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7415163B2 (en) * | 2020-02-21 | 2024-01-17 | スターライト工業株式会社 | Composition for resin gears and resin gears that are injection molded products thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102021130960B4 (en) | 2020-11-27 | 2023-07-13 | Sumitomo Heavy Industries, Ltd. | RESIN GEAR AND GEAR DEVICE |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2018180185A1 (en) | 2018-10-04 |
| JPWO2018180185A1 (en) | 2020-02-06 |
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