CN215334304U - Press-riveting fixed anti-loosening speed reducer cantilever type planetary gear shaft - Google Patents
Press-riveting fixed anti-loosening speed reducer cantilever type planetary gear shaft Download PDFInfo
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- CN215334304U CN215334304U CN202120765753.7U CN202120765753U CN215334304U CN 215334304 U CN215334304 U CN 215334304U CN 202120765753 U CN202120765753 U CN 202120765753U CN 215334304 U CN215334304 U CN 215334304U
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- 239000003638 chemical reducing agent Substances 0.000 title claims abstract description 20
- 230000002093 peripheral effect Effects 0.000 claims abstract description 29
- 238000009434 installation Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 230000002265 prevention Effects 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
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Abstract
The utility model discloses a cantilever type planet gear shaft of a pressure-riveting fixed anti-loose speed reducer, which comprises a planet carrier and a pressure-riveting type planet shaft, wherein the planet carrier is fixed on the support through a bolt; the planet carrier is provided with an assembly hole and a flanging groove, the assembly hole penetrates from the top surface of the planet carrier to the bottom surface of the planet carrier, the flanging groove is positioned on the bottom surface of the planet carrier, and the flanging groove is positioned on the periphery of the assembly hole; a groove is formed in the end face of the shaft head of the press riveting type planet shaft, and a press riveting edge is formed between the groove and the outer peripheral wall of the shaft head; when the press riveting edge is in the press riveting flanging state, the press riveting edge is positioned in the flanging groove. The cantilever type planetary gear shaft of the speed reducer with the functions of fixing and preventing looseness by pressure riveting has the advantages of compact structure, light weight, difficulty in loosening of the pressure riveting planetary shaft, simplicity in installation, convenience in operation and the like, and the practicability and stability are greatly improved.
Description
Technical Field
The utility model belongs to the technical field of engineering machinery, and particularly relates to a cantilever type planetary gear shaft of a speed reducer, which is fixed and anti-loose through pressure riveting.
Background
In planetary gear transmission, the planet wheel can rotate around the planet shaft while revolving around the sun wheel. The planet wheel is arranged on a planet shaft which is fixedly connected with the planet carrier. At present, the connection mode of a planet shaft and a planet carrier mainly comprises a cantilever type and a simply supported type, wherein the cantilever type planet carrier has the advantages of low cost, high reliability and the like.
In the existing structure, the connection mode of the cantilever type planet shaft and the planet carrier is that the cantilever type planet shaft is cast into an integral type, the clamp spring is fixed, the elastic pin is fixed and the nut is fixed, but the problems that the structure is not compact enough, the planet shaft is easy to separate from, and the assembly process is complex and the like exist.
Therefore, research and development of a novel connection mode of the cantilever type planet gear shaft and the planet carrier, which enables the planet shaft not to be easily loosened, have become important problems to be solved in the field at present.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: in order to overcome the defects in the prior art, the utility model provides a cantilever type planet gear shaft of a speed reducer, which is fixed and prevented from loosening by riveting, and aims to solve the technical problem of how to ensure that the planet shaft is not easy to loosen.
The technical scheme is as follows: in order to achieve the purpose, the utility model adopts the technical scheme that:
a cantilever type planet gear shaft of a speed reducer with fixed looseness prevention through press riveting comprises a planet carrier and a press riveting type planet shaft;
the planet carrier is provided with an assembly hole and a flanging groove, the assembly hole penetrates from the top surface of the planet carrier to the bottom surface of the planet carrier, the flanging groove is positioned on the bottom surface of the planet carrier, and the flanging groove is positioned on the periphery of the assembly hole;
a groove is formed in the end face of the shaft head of the press riveting type planet shaft, and a press riveting edge is formed between the groove and the outer peripheral wall of the shaft head;
when the press riveting edge is in a press riveting flanging state, the press riveting edge is positioned in the flanging groove.
Optionally, the groove is annular, and the groove is coaxial with the press-riveting planetary shaft.
Optionally, the distance between the outer ring at the bottom of the groove and the outer peripheral wall of the shaft head is 5% -10% of the diameter of the shaft head;
the width of the groove is 5% -15% of the diameter of the shaft head;
the depth of the groove is 120% -130% of the width of the bottom of the groove.
Optionally, the cross section of the groove is a right trapezoid, the inclined edge of the right trapezoid coincides with the inner edge of the press riveting edge, and the included angle formed by the inclined edge and the central axis of the press riveting planetary shaft is 30-40 degrees.
Optionally, the depth of the flanging groove is 1/3-1/2 of the depth of the groove.
Optionally, when the press riveting edge is in a press riveting flanging state, the angle of the press riveting flanging is 70-90 degrees.
Optionally, the outer peripheral wall of the press-riveting edge is provided with a chamfer, and the chamfer is 40-50 degrees.
Optionally, the outer circumferential wall of the shaft neck of the press-riveting planetary shaft is connected with a needle bearing; the peripheral wall of the needle bearing is connected with a planetary gear.
Optionally, the assembly hole is in interference fit with the outer peripheral wall of the shaft head; the outer peripheral wall of the journal is in clearance fit with the inner peripheral wall of the needle bearing; the planetary gear is in clearance fit with the outer peripheral wall of the needle bearing.
Optionally, a first wear pad is arranged between the shaft shoulder of the press-riveting planetary shaft and the needle bearing; and a second wear bearing pad is arranged between the needle bearing and the planet carrier.
Has the advantages that: compared with the prior art, the cantilever type planetary gear shaft of the speed reducer with the functions of fixing and preventing looseness by pressure riveting has the advantages of compact structure, light weight, difficulty in loosening of the pressure riveting planetary shaft, simplicity in installation, convenience in operation and the like, and the practicability and stability are greatly improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model and not to limit the utility model. In the drawings:
FIG. 1 is a schematic structural view of a press-riveting planetary shaft in a non-press-riveting flanging state;
FIG. 2 is a schematic structural view of the press-riveting planetary shaft in a press-riveting flanging state;
FIG. 3 is an assembly view of the clinch planet axle;
FIG. 4 is a schematic view of a clinch cuff;
fig. 5 is a bottom view of fig. 1.
In the figure: 1. a needle bearing; 2. pressing and riveting the planet shaft; 3. a first wear pad; 4. a second wear pad; 5. a planet carrier; 6. a planetary gear; 7. an assembly hole; 8. a flanging groove; 9. an inner bore; 10. pressing and riveting edges; 11. a groove; 12. a shaft head; 13. a journal; 14. and a shaft shoulder.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the related art in the field, the connection mode for the planet gear shaft and the planet carrier usually includes the modes of casting an integrated cantilever planet shaft, fixing a clamp spring, fixing an elastic pin, fixing a nut and the like, but the structure of the cast integrated cantilever planet shaft is not compact enough and is contrary to the structure required by a planetary reducer; the structure fixed by the clamp spring needs to extend out of the planet carrier by a certain length at the clamp spring end, so the structure is not compact enough, the strength of the clamp spring is limited, and the clamp spring is easy to break and the planet shaft is easy to separate through market verification; the structure fixed by the elastic pin has complicated assembly procedures, and the planet carrier is not suitable for clamping and fixing when the elastic pin is used; the structure that the nut is fixed is similar with the jump ring on the one hand, and the structure is compact enough, and on the other hand, the locking of screw fastening is also not easy thing under strong vibrations and the effect of handing over the stress.
In view of this, as shown in fig. 3, the utility model provides a cantilever type planet gear shaft of a reduction gear with fixed looseness prevention by press riveting, which comprises a planet carrier 5 and a press riveting type planet shaft 2; the planet carrier 5 is provided with a mounting hole 7 and a flanging groove 8, the mounting hole 7 penetrates from the top surface of the planet carrier 5 to the bottom surface of the planet carrier 5, the flanging groove 8 is positioned on the bottom surface of the planet carrier 5, and the flanging groove 8 is positioned on the periphery of the mounting hole 7 and is coaxial with the mounting hole 7; as shown in fig. 1, a groove 11 is formed on the end surface of a shaft head 12 of the press riveting type planet shaft 2, and a press riveting edge 10 is formed between the groove 11 and the outer peripheral wall of the shaft head 12; alternatively, the groove 11 may be formed by slotting the end surface of the head 12 of the originally filled solid press-riveting planetary shaft 2, or the head 12 of the press-riveting planetary shaft 2 with a groove structure may be manufactured by integral molding.
As shown in fig. 3, when the clinch edge 10 is in the non-clinched state, the clinch edge 10 is normally erected vertically. As shown in fig. 4, when the press-riveting edge 10 is in a press-riveting flanging state, the press-riveting edge 10 is located in the flanging groove 8, so that axial positioning can be realized, the press-riveting planetary shaft is effectively prevented from loosening, time consumption is low, the process is simple and convenient, and the operation is easy.
As an alternative embodiment, as shown in fig. 5, the groove 11 is annular, and the groove 11 is coaxial with the press-riveting planetary shaft 2; alternatively, the groove 11 may be continuous or discontinuous.
As an optional embodiment, as shown in fig. 1 and 3, the diameter of the shaft head of the press-riveting planetary shaft 2 is 45 mm, the diameter of the assembly hole 7 of the planetary carrier 5 is 44.8 mm, the distance between the outer ring of the bottom of the groove 11 and the outer peripheral wall of the shaft head 12 is 3.5 mm, the width of the bottom of the groove 11 is 3.5 mm, the width of the opening of the groove 11 is 4.5 mm, the depth of the groove 11 is 3.8 mm, the cross section of the groove 11 is a right trapezoid, the inclined edge of the right trapezoid coincides with the inner edge of the press-riveting edge 10, and the included angle formed by the inclined edge and the central axis of the press-riveting planetary shaft 2 is 35 °; the depth of the flanging groove 8 is 1.6 mm; when the press riveting edge 10 is in a press riveting flanging state, the angle of the press riveting flanging is 80 degrees; the sizes of the above parts are matched correspondingly, so that the consistency and stability of the press riveting flanging are ensured, and the problems of the press riveting flanging that the press riveting flanging is not in place and cannot be pressed are prevented.
As an alternative, the outer circumferential wall of the clinch edge 10 is provided with a chamfer of 45 °, which serves as a guide and positioning function during assembly.
As an optional implementation mode, the assembly hole 7 is in interference fit with the outer peripheral wall of the shaft head 12, and the interference fit connection is characterized by simple structure, good centering property, large bearing capacity and good impact resistance;
as an optional implementation mode, the outer peripheral wall of the shaft neck 13 of the press-riveting planetary shaft 2 is connected with the needle bearing 1, and the outer diameter of the needle bearing 1 is small, so that the structure is very compact, the weight is light, the installation is convenient, the structure is exquisite, the friction resistance is high, the bearing capacity is good, the performance is stable, and the load is large; the outer peripheral wall of the needle bearing 1 is connected with a planetary gear 6.
As an alternative embodiment, the outer circumferential wall of the journal 13 is clearance-fitted with the inner circumferential wall of the needle bearing 1; the inner hole 9 of the planet gear 6 is in clearance fit with the outer peripheral wall of the needle bearing 1.
As an alternative embodiment, a first wear pad 3 is arranged between the shaft shoulder 14 of the press-riveting planetary shaft 2 and the needle bearing 1; a second wear bearing pad 4 is arranged between the needle bearing 1 and the planet carrier 5; the first wear pad 3 and the second wear pad 4 keep the inside of the needle bearing 1 basically isolated from the outside, so that the loss of various lubricating oil and grease substances added in the needle bearing 1 is extremely small, the lubricating effect is greatly improved, and the service life of the needle bearing 1 is relatively prolonged.
In order to better understand the principle of the utility model, the following detailed description is made on the process of performing press riveting and flanging on the cantilever type planet gear shaft of the press riveting fixed anti-loose speed reducer of the utility model:
firstly, a first wear pad 3 is sleeved in a centering manner at the position, close to a shaft shoulder 14, of the outer peripheral wall of a shaft neck 13 of a press riveting type planet shaft 2, and then the first wear pad is sleeved in a needle bearing 1, so that the outer peripheral wall of the shaft neck 13 is in clearance fit with the inner peripheral wall of the needle bearing 1; the planetary gear 6 is fitted around the outer peripheral wall of the needle bearing 1, and an inner hole 9 of the planetary gear 6 is in clearance fit with the outer peripheral wall of the needle bearing 1.
Then, the second wear pad 4 is firstly sleeved on one side of the needle bearing 1 away from the shaft shoulder 14 in a centering manner, then the shaft head 12 of the press riveting type planetary shaft 2 is embedded into the assembly hole 7 of the planet carrier 5 in a matching manner, and the end surface of the shaft head 12 of the press riveting type planetary shaft 2 is flush with the bottom surface of the planet carrier 5, as shown in fig. 3.
The sleeved connection modes used in the two steps can be replaced by other equivalent modes capable of realizing connection and fixation, such as bolt fixation, positioning pin fixation and the like.
Finally, performing press riveting and flanging, specifically, using a press riveting tool located outside to be correspondingly embedded into a groove 11 of the end face of the shaft head 12, performing press riveting and flanging on a press riveting edge 10, enabling the press riveting edge 10 to face the direction of the flanging groove 8, enabling the press riveting edge 10 subjected to the press riveting and flanging to be embedded into the flanging groove 8, enabling the force of the press riveting and flanging to be 20 tons, and enabling the press riveting edge 10 subjected to the press riveting and flanging to be embedded into the flanging groove 8, so that the press riveting type planet shaft 2 and the planet carrier 5 are fixedly connected, as shown in fig. 4.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the utility model and these are intended to be within the scope of the utility model.
Claims (10)
1. The utility model provides a fixed locking speed reducer cantilever type planetary gear axle is riveted to pressure, includes planet carrier (5), its characterized in that: the device also comprises a press riveting type planet shaft (2);
the planet carrier (5) is provided with a mounting hole (7) and a flanging groove (8), the mounting hole (7) penetrates from the top surface of the planet carrier (5) to the bottom surface of the planet carrier (5), the flanging groove (8) is positioned on the bottom surface of the planet carrier (5), and the flanging groove (8) is positioned on the periphery of the mounting hole (7);
a groove (11) is formed in the end face of a shaft head (12) of the press riveting type planet shaft (2), and a press riveting edge (10) is formed between the groove (11) and the outer peripheral wall of the shaft head (12);
when the press riveting edge (10) is in a press riveting flanging state, the press riveting edge (10) is positioned in the flanging groove (8).
2. The cantilever type planet gear shaft of the pressure riveting fixed anti-loosening speed reducer as claimed in claim 1, wherein: the groove (11) is annular, and the groove (11) is coaxial with the press-riveting planetary shaft (2).
3. The cantilever type planet gear shaft of the pressure riveting fixed anti-loosening speed reducer as claimed in claim 2, wherein: the distance between the outer ring at the bottom of the groove (11) and the outer peripheral wall of the shaft head (12) is 5% -10% of the diameter of the shaft head (12);
the width of the groove (11) is 5% -15% of the diameter of the shaft head (12);
the depth of the groove (11) is 100-130% of the width of the bottom of the groove (11).
4. The cantilever type planet gear shaft of the pressure riveting fixed anti-loosening speed reducer as claimed in claim 1, wherein: the cross section of recess (11) is right trapezoid, right trapezoid's hypotenuse with the interior limit coincidence of riveting limit (10), the hypotenuse with the contained angle that the axis of riveting formula planet axle (2) formed is 30 ~ 40.
5. The cantilever type planet gear shaft of the pressure riveting fixed anti-loosening speed reducer as claimed in claim 1, wherein: the depth of the flanging groove (8) is 1/3-1/2 of the depth of the groove (11).
6. The cantilever type planet gear shaft of the pressure riveting fixed anti-loosening speed reducer as claimed in claim 1, wherein: when the press riveting edge (10) is in a press riveting flanging state, the angle of the press riveting flanging is 70-90 degrees.
7. The cantilever type planet gear shaft of the pressure riveting fixed anti-loosening speed reducer as claimed in claim 1, wherein: the peripheral wall of the pressure riveting edge (10) is provided with a chamfer angle which is 40-50 degrees.
8. The cantilever type planet gear shaft of the pressure riveting fixed anti-loose speed reducer according to any one of claims 1 to 7, wherein: the outer peripheral wall of a shaft neck (13) of the press riveting type planet shaft (2) is connected with a needle bearing (1);
the peripheral wall of the needle bearing (1) is connected with a planetary gear (6).
9. The cantilever type planet gear shaft of the pressure riveting fixed anti-loosening speed reducer as claimed in claim 8, wherein: the assembling hole (7) is in interference fit with the outer peripheral wall of the shaft head (12);
the outer peripheral wall of the journal (13) is in clearance fit with the inner peripheral wall of the needle bearing (1);
the planetary gear (6) is in clearance fit with the outer peripheral wall of the needle bearing (1).
10. The cantilever type planet gear shaft of the pressure riveting fixed anti-loosening speed reducer as claimed in claim 8, wherein: a first wear pad (3) is arranged between a shaft shoulder (14) of the press riveting type planet shaft (2) and the needle bearing (1);
and a second wear bearing pad (4) is arranged between the needle bearing (1) and the planet carrier (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120765753.7U CN215334304U (en) | 2021-04-15 | 2021-04-15 | Press-riveting fixed anti-loosening speed reducer cantilever type planetary gear shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120765753.7U CN215334304U (en) | 2021-04-15 | 2021-04-15 | Press-riveting fixed anti-loosening speed reducer cantilever type planetary gear shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215334304U true CN215334304U (en) | 2021-12-28 |
Family
ID=79594091
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120765753.7U Expired - Fee Related CN215334304U (en) | 2021-04-15 | 2021-04-15 | Press-riveting fixed anti-loosening speed reducer cantilever type planetary gear shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215334304U (en) |
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2021
- 2021-04-15 CN CN202120765753.7U patent/CN215334304U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211228 |
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| CF01 | Termination of patent right due to non-payment of annual fee |