CN108194626A - Planetary gear axis pin and planetary gear device with step - Google Patents
Planetary gear axis pin and planetary gear device with step Download PDFInfo
- Publication number
- CN108194626A CN108194626A CN201711469357.4A CN201711469357A CN108194626A CN 108194626 A CN108194626 A CN 108194626A CN 201711469357 A CN201711469357 A CN 201711469357A CN 108194626 A CN108194626 A CN 108194626A
- Authority
- CN
- China
- Prior art keywords
- planetary gear
- diameter portion
- axis pin
- bearing
- mounting hole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/042—Guidance of lubricant
-
- 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
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0467—Elements of gearings to be lubricated, cooled or heated
- F16H57/0479—Gears or bearings on planet carriers
-
- 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
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/048—Type of gearings to be lubricated, cooled or heated
- F16H57/0482—Gearings with gears having orbital motion
-
- 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
- F16H57/00—General details of gearing
- F16H57/08—General details of gearing of gearings with members having orbital motion
-
- 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
- F16H57/00—General details of gearing
- F16H57/08—General details of gearing of gearings with members having orbital motion
- F16H57/082—Planet carriers
-
- 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
- F16H57/00—General details of gearing
- F16H57/08—General details of gearing of gearings with members having orbital motion
- F16H2057/085—Bearings for orbital gears
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Details Of Gearings (AREA)
- Retarders (AREA)
Abstract
The present invention provides planetary gear axis pin and planetary gear device with step.The axial both ends of the planetary gear axis pin are respectively used to be formed with the first bearing pin mounting hole of planet carrier and the second bearing pin mounting hole and be interference fitted, planetary gear axis pin includes main part and the large-diameter portion positioned at its axial one end, the diameter of large-diameter portion is more than the diameter of main part, large-diameter portion is used to be formed with the first bearing pin mounting hole and be interference fitted, and entire planetary gear axis pin has substantially the same case hardness.In this embodiment, it is passed through convenient for main part for forming the first bearing pin mounting hole being interference fitted with large-diameter portion, large-diameter portion can only be fixed on the first bearing pin mounting hole via interference fit, can simplify assembling process.Entire planetary gear axis pin has substantially the same case hardness, this is convenient for the production of entire planetary gear axis pin.
Description
Technical field
The present invention relates to technical field of mechanical transmission, and in particular to a kind of planetary gear axis pin and planetary gear dress with step
It puts.
Background technology
Planetary gear axis pin is used to planetary gear being pivotally mounted to planet carrier.As shown in Figure 1, a kind of known planetary gear
Axis pin 10 is cylindric, and two end regions 11,13 are used to be fixed on the bearing pin mounting hole of planet carrier, and intermediate region 12 is used for and row
Star-wheel (or being " planetary gear ") or bearing clearance cooperation.
In order to ensure the wearability and hardness of intermediate region 12, need to be heat-treated intermediate region 12, and in order to
Two end regions 11 and 13 pass through the bearing pin mounting hole of planet carrier to make its deformation (straight by pressurizeing to two end regions 11 and 13 later
Diameter becomes larger) and be locked in bearing pin mounting hole, avoid two end regions 11 and 13 really up to the mark again.Thus, in the planetary gear axis pin 10
Production in, need special heat treatment process.In the assembling of the planetary gear axis pin 10, special frock clamp is needed.
Invention content
In view of the state of the above-mentioned prior art, tool of the invention is proposed to simplify the production of planetary gear axis pin and assembling
There are the planetary gear axis pin and planetary gear device of step.
A kind of planetary gear axis pin is provided, axial both ends are respectively used to and the first bearing pin mounting hole of planet carrier and second
Bearing pin mounting hole forms interference fit, and the planetary gear axis pin includes main part and the large-diameter portion positioned at its axial one end, described
The diameter of large-diameter portion is more than the diameter of the main part, and the large-diameter portion is used to match with first bearing pin mounting hole formation interference
It closes, the entire planetary gear axis pin has substantially the same case hardness.
In at least one embodiment, the main part includes middle part and small diameter portion, and the middle part is located at described
Between large-diameter portion and the small diameter portion, the diameter of the small diameter portion is less than the diameter of the middle part, the diameter of the large-diameter portion
More than the diameter of the middle part, the middle part is used to form clearance fit with planetary gear or bearing, and the small diameter portion is used for
It is formed and is interference fitted with second bearing pin mounting hole.
In at least one embodiment, chamfering is formed at the step between the small diameter portion and the middle part, and
And/or person, the large-diameter portion are connected with the middle part via frusto-conical portion.
In at least one embodiment, it is formed in the part by the large-diameter portion of the large-diameter portion and the middle part
There is axial oilhole, the radial direction oil hole connected with the axial oilhole is formed in the middle part.
In at least one embodiment, two radial directions connected with the axial oilhole are formed in the middle part
Oilhole, described two radial direction oil holes are symmetrical about the central axis of the planetary gear axis pin.
In at least one embodiment, the roughness and/or tolerance of the small diameter portion and the large-diameter portion are more than described
The roughness and/or tolerance of middle part.
In at least one embodiment, the entire planetary gear axis pin is heat-treated, to improve wearability and/or hard
Degree.
A kind of planetary gear device is provided, including：
Planet carrier is formed with the first bearing pin mounting hole and the second bearing pin mounting hole；
Planetary gear；
Bearing or axle sleeve；And
Planetary gear axis pin according to the present invention,
The planetary gear via the bearing or axle sleeve be set in the planetary gear axis pin, the bearing or axle sleeve with it is described
Planetary gear axis pin forms clearance fit,
The large-diameter portion is interference fitted into first bearing pin mounting hole, and the small diameter portion is interference fitted into described second
In bearing pin mounting hole.
In at least one embodiment, the bearing is needle bearing, which does not have inner ring and outer ring.
In at least one embodiment, the planet carrier includes the first side wall for being formed with first bearing pin mounting hole
With the second sidewall for being formed with second bearing pin mounting hole, the planetary gear device is further included positioned at the first side wall and institute
State the first washer between planetary gear and the second packing ring between the second sidewall and the planetary gear.
In the present invention, planetary gear axis pin includes large-diameter portion and main part, and large-diameter portion is for the first axis pin with planet carrier
Mounting hole is interference fitted, and the diameter of large-diameter portion is more than the diameter of main part, in this way convenient for main part across for large-diameter portion shape
Into the first bearing pin mounting hole of interference fit, large-diameter portion can only be fixed on the first bearing pin mounting hole via interference fit, can
To simplify assembling process.Entire planetary gear axis pin has substantially the same case hardness, this is convenient for entire planetary gear axis pin
Production.
Description of the drawings
Fig. 1 shows a kind of axial, cross-sectional view of known planetary gear axis pin.
Fig. 2 shows the axial, cross-sectional views of planetary gear axis pin according to embodiment of the present invention.
Fig. 3 shows the partial axial section figure of planetary gear device according to embodiment of the present invention.
Reference sign
10 planetary gear axis pins；11st, 13 liang of end regions, 12 intermediate regions；
100 planetary gear axis pins；110 large-diameter portions；111 frusto-conical portions；120 middle parts；130 small diameter portions；131 chamferings；140
Axial oilhole；151st, 152 radial direction oil hole；
200 planetary gear devices；210 the first side walls；211 first bearing pin mounting holes；220 second sidewalls；221 second axis pins are pacified
Fill hole；231 first planetary gears；232 second planetary gears；240 bearings；251 first washers；252 second packing rings；
A central axis.
Specific embodiment
Exemplary embodiments of the present invention are described with reference to the accompanying drawings.It should be appreciated that these specific descriptions are only used for
How teaching those skilled in the art implement all feasible modes of the present invention rather than the exhaustive present invention, without in
It limits the scope of the invention.
As shown in Fig. 2, an embodiment of the invention provides a kind of planetary gear axis pin 100 with step (hereinafter, having
When referred to as axis pin).Two end regions of the axis pin 100 have step design, thus by interference areas and clearance fit area
Domain separates.
Specifically, which is substantially in non-rotational symmetric shape.In the first end (left end in Fig. 2) of the axis pin 100
Including first step, so as to limit large-diameter portion 110 and middle part 120.The diameter of large-diameter portion 110 is more than the straight of middle part 120
Diameter.Include second step in the second end (right end in Fig. 2) of axis pin 100, so as to limit middle part 120 and small diameter portion 130.
The diameter of small diameter portion 130 is less than the diameter of middle part 120.
In one embodiment, entire axis pin 100 can have substantially the same case hardness.It as an example, should
Axis pin 100 can be formed by the alloy including steel.In the wearability for improving axis pin 100 for example, by being heat-treated and/or
In the case of hardness, entire axis pin can be heat-treated, this simplifies heat treatment process.
As shown in Fig. 2, being formed with chamfering 131 at step between small diameter portion 130 and middle part 120, chamfering 131 is formed
While can remove flash removed, and the chamfering 131 when axis pin 100 (middle part 120) is inserted into planetary gear or corresponding bearing
Guiding function can be played.Large-diameter portion 110 and middle part 120 are connected via frusto-conical portion 111.Large-diameter portion 110 and middle part
Diameter difference between 120 is less than the diameter difference between middle part 120 and small diameter portion 130, thus, in large-diameter portion 110 and middle part
There is usually no the spaces for forming chamfering for connecting portion between 120.It is inserted with being interference fitted by axis pin 100 (large-diameter portion 110)
When entering corresponding bearing pin mounting hole, sectional drawing conus portion 111 (inclined-plane) plays guiding function.This is convenient for the smooth peace of axis pin 100
Dress.
Axial oilhole 140 is formed in the large-diameter portion 110 of axis pin 100 and the part by large-diameter portion 110 of middle part 120,
The radial direction oil hole for running through the axis pin 100 along same diametric(al) connected with the axial direction oilhole 140 is formed in middle part 120
151、152.It, can while the weight for mitigating axis pin 100 due to forming axial oilhole 140 in the part close to large-diameter portion 110
So that the both sides (left side and right side in Fig. 2) of the weight of axis pin 100 in the axial direction are roughly equal.Two radial direction oil holes 151,
152 along same diametric(al) due to extending, thus, two radial direction oil holes 151,152 are symmetrical about the central axis A of axis pin 100.
The rotary balance of this axis pin 100 easy to implement.
Illustrate planetary gear device 200 according to the present invention referring to Fig. 3.
As shown in figure 3, planet carrier includes the first side wall 210 being substantially parallel to one another and second sidewall 220.In the first side wall
The first bearing pin mounting hole 211 is formed in 210, the second bearing pin mounting hole 221, the first axis pin are formed in second sidewall 220
211 and second bearing pin mounting hole 221 of mounting hole is aligned with each other.
Planet carrier can also include for the peripheral wall for connecting the first side wall 210 and second sidewall 220 or multiple connectors.
In the case of by for example substantially cylindric peripheral wall connection the first side wall 210 and second sidewall 220, it can be outputed on peripheral wall more
A opening, for installing planetary gear.
In the example shown in the series of figures, planetary gear is for compound planetary wheel and including the first planetary gear 231 and the second planetary gear 232.
The two can be welded together after 232 sets of the second planetary gear is attached to the first row star-wheel 231.Certainly, the present invention is not limited to
This, for example, planetary gear can also include single common planetary wheel.
The mounting means of the planetary gear device 200 of simple declaration an embodiment of the invention below.
First, the first washer 251, second packing ring 252, bearing 240 and planetary gear are installed to the first side wall 210 and second
Between side wall 220, then, from 210 place side of the first side wall, by axis pin in a manner of small diameter portion 130 forward (right side in Fig. 3)
100 are inserted into planet carrier, in other words, axis pin 100 are made to be sequentially inserted into the first bearing pin mounting hole 211, the first washer 251, bearing
240th, 252 and second bearing pin mounting hole 221 of second packing ring.
As shown in figure 3, the first washer 251, between the first side wall 210 and planetary gear, second packing ring 252 is located at planet
Between wheel and second sidewall 220.First washer 251 and second packing ring 252 can have excellent wearability, in some examples
In, the first washer 251 and second packing ring 252 include scuff-resistant coating.
Bearing 240 is mounted between axis pin 100 and planetary gear.The bearing 240 can be such as needle bearing, the needle roller axis
It contracts and includes multiple needle rollers and the retainer for keeping needle roller.Preferably, which does not include inner ring and outer ring.In this way,
The radial dimension of planetary gear device is not only reduced, and can bearing 240 be reliably achieved by oilhole 140 and 151,152
Lubrication.In the case where bearing 240 does not include inner ring, rolling element and the axis pin 100 of bearing 240 form clearance fit.This is convenient for
The installation of axis pin 100 and the reliably working for ensuring bearing 240.
The diameter of small diameter portion 130 is less than the diameter of middle part 120.Thus, small diameter portion 130 can easily pass through and centre
The washer 251,252 and bearing 240 that portion 120 coordinates, and it is interference fitted into the second bearing pin mounting hole 221.Due to middle part 120 with
Middle part 120 easily can be inserted into bearing 240 by 240 clearance fit of bearing.
The diameter of first bearing pin mounting hole 211 is more than the diameter of the second bearing pin mounting hole 221, and more than small diameter portion 130
The diameter of diameter and middle part 120.In this way, the small diameter portion 130 and middle part 120 of axis pin 100 can swimmingly pass through the first pin
Shaft mounting hole 211.The diameter of large-diameter portion 110 is more than the diameter of middle part 120 and is less than the diameter of the first bearing pin mounting hole 211,
It thus can easily realize the elastic conjunction with the first bearing pin mounting hole 211.
The planetary gear axis pin with step of the present invention and the part advantage of planetary gear device is described below.
As described above, when installing axis pin 100, it is only necessary to be axially inserted into axis pin 100, and enter the in small diameter portion 130
100 axial pressure of axis pin can be realized during two bearing pin mounting holes 221 assembling of axis pin 100.Without deliberately making 130 He of small diameter portion
Large-diameter portion 110 deforms and increases diameter.Thus, axis pin 100 assembles easily, can easily realize the standardization of assembly technology,
Reduce assembly cost.
Since axis pin 100 includes step, therefore, it is possible to readily recognize the both ends (front end on assembly direction of axis pin 100
And rear end), realize assembling back mixing design.
In the case where being heat-treated to axis pin 100, entire axis pin 100 can be heat-treated, so as to entirely sell
Axis 100 can have substantially the same case hardness.Because without special thermal treatment, it is possible to reduce the life of axis pin 100
Produce cost.
The step of axis pin 100 is by interference region (interference areas, i.e. small diameter portion 130, large-diameter portion 110) and clearance fit
Region (middle part 120) separates, and when installing axis pin 100, the impact in the different function region of axis pin 100 is influenced smaller.Together
When, different mating areas can select different roughness and tolerance, be easily worked, at low cost.For example, small diameter portion can be made
130 and large-diameter portion 110 roughness and/or tolerance be more than middle part 120 roughness and/or tolerance.
In the example shown in the series of figures, radial direction oil hole 151 and 152 is symmetrical, is conducive to system balancing.
It should be appreciated that the above embodiment is only exemplary, it is not used in the limitation present invention.Those skilled in the art can be with
Various modifications and changes are made to the above embodiment under the teachings of the present invention, without departing from the scope of the present invention.
(1) for example, the axis pin 100 of the application can only include large-diameter portion 110 and main part (corresponds to above-mentioned middle part
120 and small diameter portion 130, small diameter portion 130 is retrofit into has identical diameter with middle part 120), the diameter of large-diameter portion 110 is more than
The diameter of main part does not damage the advantage of the assembling of the invention realized and manufacture view substantially.
(2) can bearing 240 be replaced by axle sleeve etc..Even it can be omitted bearing 240.Bearing 240 is also not necessarily limited to above
The situation of discussion.
Claims (10)
1. a kind of planetary gear axis pin, which is characterized in that its axial both ends is respectively used to the first bearing pin mounting hole with planet carrier
It is formed and is interference fitted with the second bearing pin mounting hole, the planetary gear axis pin includes main part and the major diameter positioned at its axial one end
Portion, the diameter of the large-diameter portion are more than the diameter of the main part, and the large-diameter portion is used for and the first bearing pin mounting hole shape
Into interference fit, the entire planetary gear axis pin has substantially the same case hardness.
2. planetary gear axis pin according to claim 1, which is characterized in that the main part includes middle part and small diameter portion,
For the middle part between the large-diameter portion and the small diameter portion, the diameter of the small diameter portion is less than the straight of the middle part
Diameter, the diameter of the large-diameter portion are more than the diameter of the middle part, and the middle part is used to form gap with planetary gear or bearing
Cooperation, the small diameter portion are used to be formed with second bearing pin mounting hole and be interference fitted.
3. planetary gear axis pin according to claim 2, which is characterized in that the platform between the small diameter portion and the middle part
Be formed at rank chamfering and/or, the large-diameter portion is connected with the middle part via frusto-conical portion.
4. planetary gear axis pin according to claim 2, which is characterized in that lean on institute in the large-diameter portion and the middle part
The part for stating large-diameter portion is formed with axial oilhole, and the radial direction oil connected with the axial oilhole is formed in the middle part
Hole.
5. planetary gear axis pin according to claim 4, which is characterized in that be formed in the middle part and the axial direction
Two radial direction oil holes of oilhole connection, described two radial direction oil holes are symmetrical about the central axis of the planetary gear axis pin.
6. planetary gear axis pin according to claim 2, which is characterized in that the roughness of the small diameter portion and the large-diameter portion
And/or tolerance is more than the roughness and/or tolerance of the middle part.
7. the planetary gear axis pin according to any one of claim 2 to 6, which is characterized in that the entire planetary gear axis pin
It is heat-treated, to improve wearability and/or hardness.
8. a kind of planetary gear device, including：
Planet carrier is formed with the first bearing pin mounting hole and the second bearing pin mounting hole；
Planetary gear；
Bearing or axle sleeve；And
Planetary gear axis pin described in any one of claim 2 to 7,
The planetary gear is set in the planetary gear axis pin, the bearing or axle sleeve and the planet via the bearing or axle sleeve
It takes turns axis pin and forms clearance fit,
The large-diameter portion is interference fitted into first bearing pin mounting hole, and the small diameter portion is interference fitted into second axis pin
In mounting hole.
9. planetary gear device according to claim 8, which is characterized in that the bearing be needle bearing, the needle bearing
There is no inner ring and outer ring.
10. planetary gear device according to claim 8 or claim 9, which is characterized in that the planet carrier includes being formed with described the
The first side wall of one bearing pin mounting hole and the second sidewall for being formed with second bearing pin mounting hole, the planetary gear device also wrap
Include the first washer between the first side wall and the planetary gear and positioned at the second sidewall and the planetary gear it
Between second packing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711469357.4A CN108194626A (en) | 2017-12-29 | 2017-12-29 | Planetary gear axis pin and planetary gear device with step |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711469357.4A CN108194626A (en) | 2017-12-29 | 2017-12-29 | Planetary gear axis pin and planetary gear device with step |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108194626A true CN108194626A (en) | 2018-06-22 |
Family
ID=62585755
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711469357.4A Pending CN108194626A (en) | 2017-12-29 | 2017-12-29 | Planetary gear axis pin and planetary gear device with step |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108194626A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109681614A (en) * | 2019-01-02 | 2019-04-26 | 盛瑞传动股份有限公司 | Planet axis, limiting device and planetary gear assembly equipment |
-
2017
- 2017-12-29 CN CN201711469357.4A patent/CN108194626A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109681614A (en) * | 2019-01-02 | 2019-04-26 | 盛瑞传动股份有限公司 | Planet axis, limiting device and planetary gear assembly equipment |
| CN109681614B (en) * | 2019-01-02 | 2021-09-14 | 盛瑞传动股份有限公司 | Planet shaft, limiting device and planet wheel assembly equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180622 |
|
| WD01 | Invention patent application deemed withdrawn after publication |