CN205559612U - Improve synchronous ware tooth hub - Google Patents
Improve synchronous ware tooth hub Download PDFInfo
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- CN205559612U CN205559612U CN201620127132.5U CN201620127132U CN205559612U CN 205559612 U CN205559612 U CN 205559612U CN 201620127132 U CN201620127132 U CN 201620127132U CN 205559612 U CN205559612 U CN 205559612U
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Abstract
The utility model discloses an improve synchronous ware tooth hub, wherein, improve synchronous ware tooth hub is equipped with and subtracts heavy groove, subtract a heavy groove set up in synchronous ware tooth hub distributing of stress is less than the region of its greatest stress value 15%, just it is 120 circumferencial direction symmetric distributions to subtract heavy groove, improve synchronous ware tooth hub is via the integrative structure that takes shape of powder injection forming technology preparation. Make through metal powder injection forming the utility model discloses an improve synchronous ware tooth hub can carry out the structure to synchronous ware tooth hub effectively and subtract heavily, improves its machinery and mechanical properties.
Description
Technical field
This utility model designs the synchromesh gear hub that a kind of automotive transmission is used, and especially relates to one and can effectively alleviate weight
Measure, carry high performance improvement synchromesh gear hub.
Background technology
Synchromesh gear hub is one of worst part of operating mode in manual transmission, current widely used powder metallurgy process manufacture.
This part shape is complicated, and the performance requirement such as intensity, rigidity, fatigue strength, wearability is the highest.Powder metallurgically manufacturing method
Use and solve because of the complex-shaped loaded down with trivial details technological process causing employing steel part machining to be brought, processing cost height, material profit
By problems such as rate are low, use compressing+sintering way can disposable near-net-shape, carry out a small amount of necessity afterwards
Machining and heat treatment i.e. can get the tooth hub part of drawing requirement.But another defect of this preparation method, i.e. powder diameter is bigger
The phenomenon that after the sintering caused, metallographic structure porosity is big, this defect is determined by raw material and operational characteristic, it is difficult to makes up or disappears
Removing, therefore the parts density of compacting sintering formed powder metallurgy tooth hub is generally at 6.9g/cm3To 7.2g/cm3Between, maximum anti-
Tensile strength is generally below 900MPa.In order to improve the performances such as the intensity of compacting sintering powder metallurgy gear hub, fatigue and wearability,
The way more approved in industry at present is to use the warm-pressing technology of Hoeganaes company of U.S. exploitation, the most relatively conventional room temperature pressure
System adds the way of double sintering, and temperature and pressure use powder pressing at a temperature of 120 DEG C～130 DEG C, then in conventional powder
Carry out once sintered under the second time sintering temperature of metallurgical method and the sintering environment of time.Tooth hub density prepared by this way with
Tradition is colded pressing and is added the similar density of the tooth hub that double sintering obtains, slightly higher 0.1g/cm3～0.15g/cm3, maximum load-carrying capacity
Improve about 20%, and this design is also simply made that raising slightly on original Process ba-sis in the performance of tooth hub,
The most tangible change in structure.
Meanwhile, for proof strength and fatigue life, the comparison that usual tooth hub wheel spoke does is thick and heavy, adds the rotation of drive system
Inertia, is unfavorable for the raising of smooth gear shifting.Due to design and the limitation of processing technology of existing synchromesh gear hub, cause
The manufacture course of processing of existing tooth hub is complicated, and stock utilization is low, and, the structure design of synchromesh gear hub is also unable to reach more
Little quality and more excellent performance requirement.
Utility model content
This utility model solves the technical problem that and is to provide a kind of improvement synchromesh gear hub, effectively synchromesh gear hub is carried out structure
Optimize, alleviate weight, improve service behaviour.
Technical solution of the present utility model is:
A kind of improvement synchromesh gear hub, wherein, described improvement synchromesh gear hub is provided with lightening grooves, and described lightening grooves is arranged at described
Synchromesh gear hub stress distribution is less than the region of its maximum stress value 15%；And described lightening grooves is that 120 ° of circumferencial direction symmetries are divided
Cloth；Described improvement synchromesh gear hub is the integrally formed structure made via power injection molding.
Improving synchromesh gear hub as above, wherein, the relative density of described improvement synchromesh gear hub is more than 96%, and surface is hard
Degree is more than 43HRC.
Improving synchromesh gear hub as above, wherein, each wall of the lightening grooves of described improvement synchromesh gear hub uses greatest circle
Angle transition.
Improve synchromesh gear hub as above, wherein, between adjacent described lightening grooves, be provided with reinforcement, described reinforcement
Thickness is equal with lightening grooves bottom thickness.
Improving synchromesh gear hub as above, wherein, the formation that arranges of the described lightening grooves of described improvement synchromesh gear hub lubricates
Oil guides stream.
Improve synchromesh gear hub as above, wherein, described lubrication guide stream by described lightening grooves with connect described lightening grooves
Oil groove constitute.
Improving synchromesh gear hub as above, wherein, it is one end open that described lubricating oil guides stream, the structure that one end is closed,
Its opening is one end of described oil groove, and its blind end is lightening grooves.
Improve synchromesh gear hub as above, wherein, described oil groove be cross section be semicircular oil guide groove.
Improve synchromesh gear hub, wherein, a diameter of 1mm of described oil groove as above.
Being learnt by described above, this utility model has the advantage that really
1, this utility model is in synchromesh gear hub field, uses metal powder injection molded (Metal Powder Injection
Molding, MIM) technique, to the improvement lock unit after the structure optimization obtained after having carried out topological optimization and Shape optimization
Tooth hub model, is fabricated to improvement synchromesh gear hub of the present utility model；Before the improvement synchromesh gear hub that process optimizes is compared to optimizing
Existing synchromesh gear hub achieve effective structure loss of weight.
2, this utility model is in synchromesh gear hub field, by using metal powder injection molded forming technique, it is possible to effectively
Make up and solve the defect of tradition compacting sintering powder metallurgy, not only make the improvement synchromesh gear hub produced have machining concurrently
With the advantage of powder metallurgy, it is greatly improved the combination property of tooth hub；But also it is high to have forming accuracy, allowance is few, multiple
Miscellaneous geometry strong adaptability, the advantages such as material is applied widely, moulding material excellent in mechanical performance, so that improving lock unit
Tooth hub manufacture process can there is more design space, it is allowed to the geometry of synchromesh gear hub can be more complicated.Concrete embodiment
As follows:
1) compared with the design and production method that existing car, two kinds of techniques of milling participate in, eliminate the design of reserved escape, carry
The high strength and stiffness of part, decrease respective design parameter；
2) compared with tradition compacting sintering powder metallurgy (PM) technique, design parameter can be more, the synchromesh gear hub matter obtained
Amount is lighter, and stock utilization is higher, it is possible to achieve synchromesh gear hub geometry more complicated, the mechanical property of synchromesh gear hub
More preferable with surface quality；
3) compared with casting, evenly, crystal grain is thinner, and adaptability for materials is more preferable, and segregation more preferably controls in the metallographic structure of part,
More convenient for improving part mechanical property interpolation alloying element；
4) add with existing PM, casting and machine, forge and compared with the technique such as machine adds, section bar machine adds, MIM technique puts into produces
Going out ratio lower, yield rate is higher, in hgher efficiency, and stock utilization is higher, more environment-friendly, and noise is little.
As it has been described above, via improvement synchromesh gear hub of the present utility model, the synchromesh gear hub manufactured compared to traditional method, tool
There are higher intensity, rigidity, fatigue strength, wearability, more preferable mechanical property and surface quality；Also there is manufacturing cost simultaneously
Advantage low, that yield rate is high, stock utilization is high and production environment is more friendly.
Accompanying drawing explanation
Fig. 1 is the structural representation of existing synchromesh gear hub example；
Fig. 2 is the flow chart of the manufacture method for making improvement synchromesh gear hub of the present utility model；
Fig. 3 is the flow chart based on MIN technique of the manufacture method for making improvement synchromesh gear hub of the present utility model；
Fig. 4 is the structural representation of an embodiment of improvement synchromesh gear hub of the present utility model；
Fig. 5 is the structural representation of the embodiment with lubricating oil guiding stream of improvement synchromesh gear hub of the present utility model.
Main element label declaration:
1: improvement synchromesh gear hub 1': synchromesh gear hub 11: lightening grooves 12: reinforcement
13: oil groove
S1: step one S2: step 2 S3: step 3 S4: step 4
Detailed description of the invention
Improvement synchromesh gear hub of the present utility model, by using the Curve guide impeller to structure, to general conventional lock unit tooth
The redesign of hub, carries out stress analysis through computer-aided engineering (CAE), then carries out the means of effective structure optimization,
The improvement synchromesh gear hub produced via metal powder injection molded technique is obtained compared to existing synchromesh gear hub institute
The more preferably mechanical performance not possessed.
In order to be more clearly understood from technical characteristic of the present utility model, purpose and effect, now comparison accompanying drawing illustrates this practicality
Novel detailed description of the invention.
Referring to shown in Fig. 4, a kind of improvement synchromesh gear hub 1 of the present utility model, in its preferred embodiment, described improvement is same
Step device tooth hub is provided with lightening grooves 11, and described lightening grooves 11 is arranged at described synchromesh gear hub stress distribution less than its maximum stress value
The region of 15%；And described lightening grooves 11 is symmetrical in 120 ° of circumferencial directions；Described improvement synchromesh gear hub 1 is via powder
The integrally formed structure that end injection molding process makes.In a further preferred embodiment, above-mentioned low stress zones is that stress is little
In 100MPa rather than the 15% of maximum stress.
Improvement synchromesh gear hub 1 of the present utility model as above, in its preferred embodiment, described improvement synchromesh gear hub
Relative density is more than 96%, and case hardness is more than 43HRC.
Improvement synchromesh gear hub 1 of the present utility model as above, in its preferred embodiment, described improvement synchromesh gear hub 1
Each wall of lightening grooves 11 use maximum round-corner transition.
Improvement synchromesh gear hub 1 of the present utility model as above, in its preferred embodiment, adjacent described lightening grooves 11 it
Between be provided with reinforcement 12, the thickness of described reinforcement 12 is equal with lightening grooves 11 bottom thickness.
During the re-optimization design to existing synchromesh gear hub 1', as it is shown in figure 1, ensureing that tooth hub uses function
In the case of, need to ensure that the material thickness at each position of synchromesh gear hub is roughly the same, be suitable for the manufacturing and (be especially adapted for use in
Metal powder injection molded technology), and can reach fully stressed design simultaneously, fully improve stock utilization.
Refer to shown in Fig. 5, improvement synchromesh gear hub 1 of the present utility model as above, in its preferred embodiment, institute
The formation lubricating oil that arranges stating the described lightening grooves 11 improving synchromesh gear hub 1 guides stream.
Improvement synchromesh gear hub 1 of the present utility model as above, in its preferred embodiment, described lubrication guide stream by
Described lightening grooves 11 is constituted with the oil groove 13 connecting described lightening grooves.As it can be seen, shown oil groove 13 connects each lightening grooves 11
In trapped fuel, when making tooth hub rotate, lubricating oil flows in lightening grooves 11, between tooth hub and Gear Contact Surface formed oil film, carry
High lubricant effect.
Improvement synchromesh gear hub 1 of the present utility model as above, in its preferred embodiment, described lubricating oil guides stream
For one end open, the structure that one end is closed, its opening is one end of described oil groove 13, and its blind end is lightening grooves 11.
Improvement synchromesh gear hub 1 of the present utility model as above, in its preferred embodiment, described oil groove 13 for cross section is
Semicircular oil guide groove.
Improvement synchromesh gear hub 1 of the present utility model as above, in its preferred embodiment, described oil groove 13 a diameter of
1mm。
Above-mentioned several embodiments are combined, at this preferably by the several preferred embodiment of the present utility model of summary
In embodiment, when tooth hub rotates, lubricating oil enters in the oil groove 13 connecting described lightening grooves, enters back into lightening grooves；
It is the closing of one end open one end owing to every lubricating oil guides stream, therefore, when the oil liquid pressure in lightening grooves can be stepped up,
When this pressure is sufficiently high, lubricating oil can back down and be pressed in the power shift gear improving synchromesh gear hub end face, is diffused into the form of oil film
Between tooth hub end face and power shift gear end face, reduce the abrasion of tooth hub end face, whereby, further improve of the present utility model changing
Enter lubrication and the wearability on synchromesh gear hub surface.
Improvement synchromesh gear hub of the present utility model, in order to it is better illustrated, same with existing conventional a kind of variator
Step device tooth hub 1'(refers to shown in Fig. 1) as a example by, first, by setting up this synchromesh gear hub threedimensional model, and it is carried out
Cae analysis, obtains the stress distribution cloud atlas of this synchromesh gear hub.Second, because the material mechanical performance that MIM technique produces
The same material that compacting sintering powder metallurgy to be substantially better than makes, the removable former synchromesh gear hub 1' when optimized synchronization device tooth hub
The material of low stress zones, the material distribution making the synchromesh gear hub after optimization is more reasonable, utilizes more abundant；Therefore more preferably,
This example selects improve synchromesh gear hub with metal powder injection molded (MIN) technology manufacture, therefore select to be suitable for MIN technique
Material FN04Mo.3rd, according to stress distribution analysis result and the parameter of selected materials, the three-dimensional to synchromesh gear hub
Model carries out topological optimization and Shape optimization, removes the material of described synchromesh gear hub low stress zones, forms described improvement and synchronizes
The model (refering to shown in Fig. 4) of device tooth hub 1；Meanwhile, when duplicate removal, notice that existing synchromesh gear hub geometric properties presents 120 °
The feature of periodic symmetry, therefore removing the lightening grooves 11 reformed also is along the circumferential direction to be distributed, and in 120 ° of periodic symmetry.For
Ensure that the improvement synchromesh gear hub 1 of the present utility model after duplicate removal has enough rigidity, be formed between adjacent lightening grooves 11
Reinforcement 12, and the width of this reinforcement 12 is roughly equal with lightening grooves 11 bottom thickness.Remove after weight-reducing material at spoke
On reinforcement 12 trend should with improve synchromesh gear hub 1 stress work time internal stress trend be consistent, to meet force request.
4th, use metal powder injection molded technique to manufacture out improvement synchromesh gear hub 1 of the present utility model.And by reality
Check again, the maximum stress of the improvement synchromesh gear hub 1 of the present utility model after finite element analysis, optimization is with existing
The maximum stress of former synchromesh gear hub is close, and maximum stress is close to the half of selected materials yield limit, its rigidity, intensity, tired
Labor intensity, wearability are more preferable, have more preferable mechanical property and surface quality；And there is visibly homogeneous metallographic structure, material
The performance isotropism of material can be more preferable, and the yield limit of material is brought up to by the 690MPa of the material of former synchromesh gear hub
1340MPa, nearly doubles, and the case hardness improving synchromesh gear hub is increased to 430HV5 by original 340HV5, resistance to
Mill property obtains huge raising；The a whole set of weight improving synchromesh gear hub is dropped to 825g by original 880g, its weight ratio
Former synchromesh gear hub decreases 55g, it is achieved that effectively loss of weight.
Compared to the design of former synchromesh gear hub 1', as it is shown in figure 1, due to designing and manufacturing method, for ensureing part
Intensity and fatigue strength, and the restriction of geometric properties complexity, it is impossible to lightening grooves is set, and has all made solid construction,
Add weight and the inertia of synchromesh gear hub, waste material, and performance has declined relative to forging machining.
In order to better illustrate structure and the advantage of improvement synchromesh gear hub of the present utility model, below by this improvement lock unit of making
The manufacture method of tooth hub is described as follows:
Refer to shown in Fig. 2, for making the steps flow chart schematic diagram of the manufacture method of improvement synchromesh gear hub of the present utility model,
It is also preferred that the left the manufacture method of this improvement synchromesh gear hub includes:
Step one S1, chooses a synchromesh gear hub (as shown in Figure 1), sets up the threedimensional model of this synchromesh gear hub, and to this
The threedimensional model of synchromesh gear hub carries out computer-aided engineering analysis.Software is calculated, to this synchromesh gear hub by project analysis
Threedimensional model carry out the analysis of different parameters, can obtain synchromesh gear hub in working order under stress distribution, and work
Maximum stress, provides data basis for further optimizing design.
Step 2 S2, chooses the material making this improvement synchromesh gear hub, it is thus achieved that the yield limit intensity of described material and tension pole
Limit intensity；The requirement of the existing performance according to existing tooth hub, and the process requirements in technique manufacturing process, select to be suitable for this and change
Enter the material that synchromesh gear hub makes.Concrete, this material is metal material.Thus after selected material, just obtain material
The yield limit intensity of material.
Step 3 S3 is strong according to the yield limit in the result of the described computer-aided engineering analysis in step one and step 2
Degree and ultimate tensile intensity carry out topological optimization and Shape optimization to the threedimensional model of described synchromesh gear hub, remove described lock unit
The material of tooth hub low stress zones, forms the model of described improvement synchromesh gear hub.
Concrete, it is possible to use existing computer optimization software (such as optistruct etc.), by arranging material parameter, and
The data such as the stress intensity of existing synchromesh gear hub and stress distribution, run topological optimization algorithm and show that optimal material is distributed, in conjunction with
Technique makes requirement and the working environment of existing synchromesh gear hub and functional requirement, draws the three-dimensional mould improving synchromesh gear hub
Type, and by Shape optimization, on the premise of ensureing part strength, rigidity and fatigue, obtain the optimum to existing synchromesh gear hub
Change design, export the model of described improvement synchromesh gear hub.
Step 4 S4, according to model and the selected described material of this improvement synchromesh gear hub, by metal powder injection molded institute
State improvement synchromesh gear hub.
The manufacture method improving synchromesh gear hub as above, it is it is also preferred that the left the described computer-aided engineering in step one is divided
Analysis includes: the threedimensional model of described synchromesh gear hub is carried out finite element stimulation, obtains described synchromesh gear hub at work shape
Stress distribution under state, and work maximum stress.
In concrete preferred implementation, in this step, by utilizing works software (such as CAD etc.), existing tooth hub is entered
Row three-dimensional modeling, then carry out cae analysis to the threedimensional model of existing synchromesh gear hub generated, and draws and manufactures
Optimize design direction.It is preferred that can by use existing synchromesh gear hub threedimensional model is carried out finite element stimulation in the way of,
Obtain synchromesh gear hub in working order under stress distribution, and work maximum stress, provide number for further optimizing design
According to basis.
The as above manufacture method improving synchromesh gear hub, it is also preferred that the left it is according to the performance requirement of concrete synchromesh gear hub,
Described topological optimization and Shape optimization in step 3 should follow specific optimization principles, and concrete, its content includes:
The maximum stress of the described improvement synchromesh gear hub after a, setting optimization is less than the yield limit of described material, after optimization
The rigidity of described improvement synchromesh gear hub is greater than or equal to the rigidity of described synchromesh gear hub before optimizing；
B, set optimize after described improvement synchromesh gear hub maximum stress as described material yield limit intensity 1/2 at,
And fluctuate 10%.
By above-mentioned optimal design-aside, it is possible to after effectively ensureing synchromesh gear hub is optimized, it is ensured that the synchromesh gear hub after optimization
The performance of intensity, rigidity and fatigue strength.
The manufacture method improving synchromesh gear hub as above, it is it is also preferred that the left described topological optimization and shape in step 3 are excellent
The content changed also includes:
C, on described improvement synchromesh gear hub, it is provided with the mode of lightening grooves removes the material of described synchromesh gear hub low stress zones
Material, described lightening grooves is 120 ° of circumferencial direction symmetries, and each wall of described lightening grooves uses maximum round-corner transition.
Concrete, described improvement synchromesh gear hub can be provided with multiple described lightening grooves, and all lightening grooves are divided into symmetry
Three groups, symmetrical in 120 ° of circumferencial directions centered by the center of circle so that it is meet synchromesh gear hub in working order under stress
Requirement of balance.Each wall junction of described lightening grooves uses maximum round-corner transition, with avoid the unbalanced stress weighing apparatus that is likely to occur and
The problem that stress is concentrated.
Further, reinforcement, the trend of described reinforcement and improvement synchromesh gear hub it are provided with between adjacent described lightening grooves
During stress work, internal stress trend is consistent, to meet force request.It addition, the spoke thickness everywhere after You Huaing is the most substantially
Equal, the thickness bottom the width of wherein said reinforcement and described lightening grooves is roughly equal, in order to reach fully stressed design,
Improve stock utilization.
The as above manufacture method improving synchromesh gear hub, it is it is also preferred that the left described metal powder injection molded in step 4
Manufacturing process include:
Determine degreasing sintered shrinkage ratio, design and make the injection molding of described improvement synchromesh gear hub；
By described material and binding agent mixing making feeding, described feeding is put in injector, and is injected into described injection molding
Die cavity in, one-body molded green compact；
Described green compact are carried out degreasing sintered, and carries out heat treatment and polishing.
After inspection, obtain qualified improvement synchromesh gear hub product.
Wherein, in injection process be according to material and the mechanical performance of tooth hub to be produced at certain temperature and pressure
Under carry out.
In the present embodiment, for improving the bearing capacity of synchromesh gear hub, reduce the weight of synchromesh gear hub, improve lock unit tooth
The lubrication of hub, optimizes fuel economy, improves smooth gear shifting, have employed energy-conserving and environment-protective in this utility model preferably embodiment
Green processing technologies: metal powder injection molded technology preparation improve synchromesh gear hub.Metal powder injection molded technology has
The part shape complexity adaptability of height and fine and closely woven formation of parts metallographic structure, and the most optional material ranges, it is possible to
Well improve synchromesh gear hub performance and reduce the weight of synchromesh gear hub.
The as above manufacture method improving synchromesh gear hub, itself it is also preferred that the left applied metal Powder Injection Molding Technology time,
Also include at topological optimization described in step 3 and Shape optimization content:
Described improvement synchromesh gear hub after optimization is compared to the described synchromesh gear hub before optimizing, at its ring gear tooth root, slide block
Stress at groove and U-lag can increase, and the ratio that stress increases is less than described improvement synchromesh gear hub material therefor compared to institute
State the ratio that the yield limit of synchromesh gear hub material therefor increases.Whereby, it is ensured that the improvement synchromesh gear hub each several part after optimization
Stress distribution all disclosure satisfy that the demand of duty.
Current compacting sintering PM technique is prepared the material that synchromesh gear hub used and is generally Fe-Cu-C Series powder smelting
Gold copper-base alloy, in order to improve intensity, rigidity, fatigue strength, wearability, it will usually add the Cr of certain mass mark, Mo,
The elements such as Ni.These material systems are equally applicable to metal powder injection molded, but material aspect compared with compacting sintering powder metallurgy
Maximum difference is, the metal dust particle diameter of metal powder injection molded employing is less, in 5～20 μ m.And this
After the improvement synchromesh gear hub of utility model uses metal powder injection molded technology to prepare, the material relative density energy of part
Reaching more than 96%, it might even be possible to reach full densification, sintered part(s) i.e. can reach the performance suitable with forge piece；Additionally its surface
Hardness can also reach more than 43HRC.Comparing T-P environment, MIM technology can more effectively make up tradition compacting sintering powder
The defect that end is metallurgical, in conjunction with the advantage of machining with powder metallurgy, promotes the performance of tooth hub.
Use metal powder injection molded technology embodiment in, the most described material is chosen as: FN04Mo or
MIM-4605.It is to be currently adapted for metal powder injection molded technology and the material of existing synchromesh gear hub that the material chosen is worked as
Material that cookingization comparison of ingredients is similar, that price is relatively cheap, to reduce as far as possible on the premise of ensureing part serviceability
Cost.Wherein: the material composition of FN04Mo: C is 0.4～0.75%, and Ni is 3.5～4.5%, and Mo is 0.3～0.7%, S
≤ 0.025%, remaining for Fe；And the material composition of MIM-4650: C is 0.4～0.6%, and Ni is 1.5～2.5%, Mo
It is 0.2～0.5%, Si≤1.0, remaining for Fe.
In addition, metal powder injection molded technology has broken compacting sintering powder metallurgy to part geometry on pressing direction
Feature limits, and the restriction that small structure shapes, and more efficiently can meet synchromesh gear hub and carry out the need of structure loss of weight optimization
Ask.
In sum, improvement synchromesh gear hub of the present utility model, by designing, according to design the re-optimization of existing lock unit
Demand manufactures, and have effectively achieved the Lightened structure of synchromesh gear hub, makes improvement synchromesh gear hub of the present utility model reach
More excellent machinery that existing synchromesh gear hub does not has and mechanical property, reduce production cost, improve the utilization rate of material.
The foregoing is only the schematic detailed description of the invention of this utility model, be not limited to scope of the present utility model.Appoint
What those skilled in the art, equivalent variations done on the premise of without departing from design of the present utility model and principle with repair
Change, the scope of this utility model protection all should be belonged to.
Claims (9)
1. one kind is improved synchromesh gear hub, it is characterised in that described improvement synchromesh gear hub is provided with lightening grooves, described lightening grooves
It is arranged at the described synchromesh gear hub stress distribution region less than its maximum stress value 15%；And described lightening grooves is 120 ° of circumference
Direction is symmetrical；Described improvement synchromesh gear hub is the integrally formed structure made via power injection molding.
Improve synchromesh gear hub the most as claimed in claim 1, it is characterised in that described improvement synchromesh gear hub the closeest
Degree is more than 96%, and case hardness is more than 43HRC.
Improve synchromesh gear hub the most as claimed in claim 1 or 2, it is characterised in that subtracting of described improvement synchromesh gear hub
Each wall of Baking soda uses maximum round-corner transition.
Improve synchromesh gear hub the most as claimed in claim 3, it is characterised in that be provided with between adjacent described lightening grooves and add
Strong muscle, the thickness of described reinforcement is equal with lightening grooves bottom thickness.
Improve synchromesh gear hub the most as claimed in claim 4, it is characterised in that subtract described in described improvement synchromesh gear hub
The formation lubricating oil that arranges of Baking soda guides stream.
Improve synchromesh gear hub the most as claimed in claim 5, it is characterised in that described lubrication guides stream by described loss of weight
Groove is constituted with the oil groove connecting described lightening grooves.
Improve synchromesh gear hub the most as claimed in claim 6, it is characterised in that it is that one end is opened that described lubricating oil guides stream
Mouthful, the structure that one end is closed, its opening is one end of described oil groove, and its blind end is lightening grooves.
Improve synchromesh gear hub the most as claimed in claim 7, it is characterised in that described oil groove be cross section be semicircular leading
Oil groove.
Improve synchromesh gear hub the most as claimed in claim 8, it is characterised in that a diameter of 1mm of described oil groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620127132.5U CN205559612U (en) | 2016-02-18 | 2016-02-18 | Improve synchronous ware tooth hub |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620127132.5U CN205559612U (en) | 2016-02-18 | 2016-02-18 | Improve synchronous ware tooth hub |
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| CN205559612U true CN205559612U (en) | 2016-09-07 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113137436A (en) * | 2021-05-10 | 2021-07-20 | 扬州意得机械有限公司 | Powder metallurgy synchronizer gear hub |
| CN113803381A (en) * | 2021-10-09 | 2021-12-17 | 西安铝轻新材料科技有限公司 | Ultrahigh heat conduction powder metallurgy synchronizer cone ring and manufacturing method thereof |
-
2016
- 2016-02-18 CN CN201620127132.5U patent/CN205559612U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113137436A (en) * | 2021-05-10 | 2021-07-20 | 扬州意得机械有限公司 | Powder metallurgy synchronizer gear hub |
| CN113803381A (en) * | 2021-10-09 | 2021-12-17 | 西安铝轻新材料科技有限公司 | Ultrahigh heat conduction powder metallurgy synchronizer cone ring and manufacturing method thereof |
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