CN220551443U - Planetary gear box and speed reducer - Google Patents
Planetary gear box and speed reducer Download PDFInfo
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- CN220551443U CN220551443U CN202322167049.3U CN202322167049U CN220551443U CN 220551443 U CN220551443 U CN 220551443U CN 202322167049 U CN202322167049 U CN 202322167049U CN 220551443 U CN220551443 U CN 220551443U
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- planet
- planet carrier
- gear set
- planetary gear
- gear
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- 239000003638 chemical reducing agent Substances 0.000 title claims abstract description 9
- 230000005540 biological transmission Effects 0.000 claims abstract description 61
- 230000003287 optical effect Effects 0.000 claims abstract description 38
- 238000005096 rolling process Methods 0.000 claims abstract description 17
- 125000006850 spacer group Chemical group 0.000 claims description 14
- 230000000694 effects Effects 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000009347 mechanical transmission Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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Abstract
The utility model discloses a planetary gear box and a speed reducer, wherein the planetary gear box comprises: a shell, wherein a transmission assembly is arranged in the shell; the transmission assembly includes: the head end gear set comprises at least one planetary gear set, wherein the planetary gear set comprises a first planet carrier and a first planet wheel connected with the first planet carrier, and a ball bearing is arranged between a first optical axis of the first planet carrier and the first planet wheel; the tail end gear set is arranged at the tail end of the transmission assembly and comprises a second planet carrier and a second planet wheel connected with the second planet carrier, a rolling element is arranged between a second optical axis of the second planet carrier and the second planet wheel, and the rolling element is a needle roller or a needle roller bearing; the sun gear is arranged in the first planetary gear set and the second planetary gear set, and is meshed with the first planetary gear or the second planetary gear set. Above-mentioned planetary gear case, the great moment of torsion of transmissible, bearing failure when avoiding transmission operation leads to the gear case operation to block, guarantees the life and the transmission efficiency of gear case.
Description
Technical Field
The utility model relates to the technical field of transmission, in particular to a planetary gear box. In addition, the utility model also relates to a speed reducer comprising the planetary gear box.
Background
The planetary gear box is a mechanism that a plurality of planetary gears rotate around a sun gear, the shaft of the sun gear is connected with a driving shaft, and the plurality of planetary gears are respectively connected with the sun gear through a concentric circle, so that the mechanical effect of speed reduction and reinforcement can be realized.
The planetary gear box comprises a planet carrier and a planet gear rotationally connected with the planet carrier, in order to avoid friction between surfaces generated between the planet gear and an optical axis of the planet carrier during power transmission and reduce mechanical abrasion and noise, a needle roller or a needle roller bearing is usually arranged between the planet gear and the optical axis, and sliding friction is changed into rolling friction, but the mode is only suitable for a small-torque gear box, and in the process of transmitting power by a large-torque gear box, the needle roller bearing is easy to rub with the end face or a gasket of the planet carrier, so that the transmission efficiency is lower.
In summary, how to ensure the power transmission efficiency of the high-torque gearbox is a problem to be solved by those skilled in the art.
Disclosure of Invention
Therefore, the utility model aims to provide the planetary gear box which can transmit larger torque, avoid bearing failure during transmission operation, lead to the operation blocking of the gear box, influence the power transmission efficiency and ensure the service life and the transmission efficiency of the gear box. Another object of the utility model is to provide a reduction gear comprising a planetary gearbox as described above.
In order to achieve the above object, the present utility model provides the following technical solutions:
a planetary gearbox comprising:
a shell, wherein a transmission assembly is arranged in the shell;
the transmission assembly includes:
the head end gear set comprises at least one planetary gear set, wherein the planetary gear set comprises a first planet carrier and a first planet wheel connected with the first planet carrier, and a ball bearing is arranged between a first optical axis of the first planet carrier and the first planet wheel;
the tail end gear set is arranged at the tail end of the transmission assembly and comprises a second planet carrier and a second planet wheel connected with the second planet carrier, a rolling piece is arranged between a second optical axis of the second planet carrier and the second planet wheel, and the rolling piece is a needle roller or a needle roller bearing;
the sun gear is arranged in the first end gear set and the tail end gear set, and is meshed with the first planet gear or the second planet gear.
Preferably, at least two ball bearings are disposed between the first optical axis and the first planet gear at intervals.
Preferably, a first limiting member is disposed between two adjacent ball bearings, for limiting the offset of the ball bearings.
Preferably, the first limiting member is a gasket or a shaft sleeve.
Preferably, the first spacer is clamped at the head end of the second optical axis, and the second planet wheel is arranged between the first spacer and the second planet carrier.
Preferably, a gap is provided between one end of the ball bearing, which is close to the first carrier, and the first carrier.
Preferably, the tail end of the tail end gear set is connected with an output shaft for outputting power of the tail end gear set.
Preferably, a rear end cover is arranged at the tail end of the shell, and the output shaft penetrates through the rear end cover and is sleeved with a second limiting part.
The present utility model also provides a decelerator comprising:
a planetary gearbox according to any one of the preceding claims;
the output end of the driving piece is connected with the input end of the planetary gear box.
Preferably, a second gasket is arranged between the shell and the output end of the driving piece, and a gap is arranged between one end, close to the driving piece, of the ball bearing and the second gasket.
The planetary gear box comprises a shell and a transmission assembly arranged in the shell, wherein the transmission assembly comprises a head end gear set, a tail end gear set and a sun gear, the head end gear set comprises at least one planetary gear set, the planetary gear set comprises a first planet carrier and a first planet wheel connected with the first planet carrier, a ball bearing is arranged between the first planet wheel and a first optical axis on the first planet carrier, friction between the optical axis and the planet wheel in the power transmission process of the high-torque gear box is reduced, the operation of the transmission assembly is more reliable, and the power transmission efficiency is improved; the end gear set is arranged at the end of the transmission assembly and comprises a second planet carrier and a second planet wheel connected with the second planet carrier, a rolling element is arranged between a second optical axis of the second planet carrier and the second planet wheel, the rolling element is a needle roller or a needle roller bearing, torque transmission of a high-torque gear box can be met, when the torque transmission of the end gear set is large, the reliability of operation can be ensured, the bearing can bear radial large load through the needle roller or the needle roller bearing, failure of the bearing during operation of the transmission assembly is prevented, the operation of the gear box is blocked, the power transmission efficiency is influenced, and the service life of the gear box is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present utility model, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a transmission according to the present utility model;
FIG. 2 is a cross-sectional view of FIG. 1;
FIG. 3 is a schematic diagram of a transmission assembly according to the present utility model;
FIG. 4 is a front view of FIG. 3;
fig. 5 is a cross-sectional view of fig. 3.
In fig. 1 to 5, reference numerals include:
the planetary gear mechanism comprises a driving piece 1, a shell 2, a rear end cover 3, an output shaft 4, a first planet carrier 5, a ball bearing 6, a first planet gear 7, a second planet carrier 8, a second planet gear 9, a rolling piece 10, a first gasket 11, a first limiting piece 12, a second gasket 13, a sun gear 14 and a second limiting piece 15;
a first optical axis 51, a second optical axis 81.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The utility model aims to provide a planetary gear box which can transmit larger torque, avoid bearing failure during transmission operation, lead to operation blocking of the gear box, influence power transmission efficiency and ensure service life and transmission efficiency of the gear box. Another core of the utility model is to provide a reduction gear comprising a planetary gearbox as described above.
A planetary gear box comprises a housing 2 and a transmission assembly therein for transmitting power, wherein the transmission assembly comprises a head gear set and a tail gear set, and please refer to fig. 1, 2, 3 and 5.
In this embodiment, the first gear set and the second gear set together form a transmission assembly, wherein the first gear set is the first planetary gear transmission assembly, and the second gear set is the last planetary gear transmission assembly.
The head gear set includes at least one planetary gear set, and a plurality of planetary gear sets may be provided as needed. The planetary gear set comprises a first planet carrier 5 and first planet gears 7 connected with the first planet carrier, specifically, a plurality of first optical axes 51 are arranged on the first planet carrier 5 around the axis direction of the first planet carrier, the first planet gears 7 are arranged on the first optical axes 51, ball bearings 6 are arranged between the first planet carrier and the first optical axes 51, the inner rings of the ball bearings 6 are tightly matched with the first optical axes 51, and the outer rings of the ball bearings 6 are tightly matched with the first planet gears 7.
In addition, still be equipped with sun gear 14, ring gear in the first end gear train, first planet wheel 7, ring gear all mesh with sun gear 14, sun gear 14 and gear box input shaft rotate and are connected, and the input shaft can be driven by power component, makes sun gear 14 rotate, and sun gear 14 rotates and can drive first planet wheel 7 and rotate in the ring gear to further transmit power to first planet carrier 5 on, with the rotation of further drive sun gear 14 of first planet carrier 5 rear end, realize the rotational speed reduction with the input of gear box input shaft, realize the effect of deceleration reinforcement.
In this embodiment, referring to fig. 1 and 2, as an implementation manner, the first gear set includes two planetary gear sets, the change of the rotation speed of the input shaft of the gearbox is achieved through two planetary gear sets, and further, the larger output torque is achieved through the final gear set of the final stage.
The number and the size of the first planet gears 7 in the two planetary gear sets can be designed according to actual requirements. Ball bearings 6 are arranged between the first optical axis 51 and the first planet gears 7 in the two planetary gear sets, and the number of the ball bearings 6 can be one, two or more, and the design can be carried out according to actual needs. As a preferred embodiment, two or more ball bearings 6 are provided to ensure the stable reliability of the overall operation of the gearbox.
The arrangement of the ball bearing 6 ensures that the first planet wheel 7 is more reliable in rotation, reduces friction collision between the first planet wheel 7 and the first optical axis 51, reduces contact abrasion and noise, and improves power transmission efficiency.
The tail end gear set is arranged at the tail end of the transmission assembly, namely the last stage of transmission of the transmission assembly, and comprises a second planet carrier 8 and a second planet wheel 9 connected with the second planet carrier, specifically, the second planet wheel 9 is connected with a second optical axis 81 on the second planet carrier 8, a rolling element 10 is arranged between the second optical axis 81 and the second planet wheel 9, the inner side of the rolling element 10 is tightly matched with the second optical axis 81, and the outer side of the rolling element 10 is tightly matched with the second planet wheel 9. By the arrangement of the rolling element 10, friction between the second planet wheel 9 and the second optical axis 81 is reduced, contact wear and noise are reduced, and power transmission is ensured.
The rolling element 10 is arranged as a needle roller or a needle roller bearing, can bear larger radial load, and can have higher load bearing capacity when a planetary gear box needs to output larger torque, so that the gear box is prevented from being blocked due to bearing failure, and the power transmission efficiency is prevented from being influenced.
In addition, the end gear set should also include sun gear 14 and ring gear, and second planet wheel 9, ring gear all mesh with sun gear 14, and the power drive sun gear 14 rotation that the first end gear set transmitted can realize the rotation of second planet wheel 9 further, can realize the rotation of second planet carrier 8, further will change great moment output after the back for use.
Alternatively, in the present embodiment, the ball bearing 6 between the first optical axis 51 and the first planet gear 7 may be one, so as to reduce friction between the first optical axis 51 and the first planet gear 7 and ensure power transmission efficiency.
The planetary gear box comprises a shell 2 and a transmission assembly arranged in the shell, wherein the transmission assembly comprises a head gear set, a tail gear set and a sun gear 14, the head gear set comprises at least one planetary gear set, the planetary gear set comprises a first planet carrier 5 and a first planet wheel 7 connected with the first planet carrier, a ball bearing 6 is arranged between the first planet wheel 7 and a first optical axis 51 on the first planet carrier 5, friction between the optical axis and the planet wheel in the power transmission process of the high-torque gear box is reduced, and the ball bearing 6 ensures that the transmission assembly works more reliably and improves the power transmission efficiency; the end gear set is arranged at the end of the transmission assembly and comprises a second planet carrier 8 and a second planet wheel 9 connected with the second planet carrier, a rolling element 10 is arranged between a second optical axis 81 of the second planet carrier 8 and the second planet wheel 9, the rolling element 10 is a needle roller or a needle roller bearing, torque transmission of a high-torque gear box can be met, when the torque transmitted by the end gear set is large, the reliability of operation can be ensured, the bearing can bear radial large load through the needle roller or the needle roller bearing, failure of the bearing during operation of the transmission assembly is prevented, the operation of the gear box is blocked, the power transmission efficiency is influenced, and the service life of the gear box is ensured.
On the basis of the above embodiment, at least two ball bearings 6 are arranged at intervals between the first optical axis 51 and the first planet wheel 7.
Referring to fig. 2 and 5, at least two ball bearings 6 are disposed between the first optical axis 51 and the first planet gears 7 at intervals, so as to avoid bearing failure or friction collision with the first planet carrier 5, so that the operation of the transmission assembly of the gearbox is more stable and reliable, and the power transmission efficiency in the process of large torque transmission is improved.
At least two ball bearings 6 are arranged at intervals and are not mutually influenced, and the interval between the two ball bearings can be designed according to actual conditions without limitation.
On the basis of any of the above embodiments, a first stopper 12 is provided between two adjacent ball bearings 6 for restricting the displacement of the ball bearings 6.
The first limiting piece 12 is arranged between two adjacent ball bearings 6, so that the problem that the ball bearings 6 collide with each other and rub in the power transmission process of the gear box, so that the bearing is invalid or the effect is poor is solved.
In the present embodiment, the first stopper 12 is not limited in its structural form, and it is sufficient to separate adjacent ball bearings 6 and limit their displacement.
On the basis of any of the above embodiments, the first limiting member 12 is a spacer or a sleeve.
The first limiting part 12 is sleeved on the first optical axis 51, and can be a gasket or a shaft sleeve, so that friction collision between two adjacent ball bearings 6 is avoided, and the stability of the operation of the gearbox is ensured.
Optionally, the number of shims or bushings provided between two adjacent ball bearings 6 is not limited, and the design requirement of the actual gearbox is determined.
On the basis of any of the above embodiments, the first spacer 11 is clamped at the head end of the second optical axis 81, and the second planet wheel 9 is disposed between the first spacer 11 and the second planet carrier 8.
Referring to fig. 4 and 5, the first spacer 11 is clamped at the head end of the second optical axis 81, the head end of the second optical axis 81 is away from one end of the second planet carrier 8, and the second planet wheel 9 is arranged between the first spacer 11 and the second planet carrier 8, so that the overall stability and reliability of the rotation of the second planet wheel 9 are ensured, and the service life of the gear box is prolonged.
On the basis of any of the above embodiments, a gap is provided between the end of the ball bearing 6 close to the first carrier 5 and the first carrier 5.
Referring to fig. 3 to 5, the ball bearing 6 is close to one end of the first planet carrier 5, i.e. the right end of the ball bearing 6, and a gap is provided between the right end of the ball bearing 6 and the first planet carrier 5, so as to avoid collision friction between the bearing and the planet carrier, thereby avoiding bearing failure or damage, ensuring the reliable stability of power transmission of the gearbox, and ensuring the mechanical transmission efficiency.
On the basis of any embodiment, the tail end of the tail end gear set is connected with an output shaft 4 for outputting the power of the tail end gear set.
Referring to fig. 1 and 2, the output shaft 4 is connected to the end of the end gear set, and the rotation shaft of the second planet carrier 8 is coaxial with the output shaft 4, so that the power after the operation of the planetary gear box is output through the output shaft 4 for use.
On the basis of any of the above embodiments, the end of the housing 2 is provided with a rear end cover 3, the output shaft 4 passes through the rear end cover 3, and the outer side is sleeved with a second limiting piece 15.
Referring to fig. 1, 2, 4 and 5, the rear end cover 3 disposed at the end of the housing 2 can support and protect the transmission assembly, the output shaft 4 is sleeved with a second limiting member 15, the second limiting member 15 can be a clamp spring, a steel ring or a steel sleeve, and has a certain bearing capacity, and through the arrangement of the second limiting member 15, the axial gap of the output shaft 4 can be eliminated, the axial movement of the output shaft 4 can be reduced, and the stability and reliability of power output can be ensured.
Optionally, a sealing element can be further arranged on the rear end cover 3, so that a sealing effect is achieved, oil leakage or dust entering of the gearbox is avoided, and reliable stability of operation of the gearbox is guaranteed.
In addition to the planetary gear box, the utility model also provides a speed reducer comprising the planetary gear box disclosed in the embodiment, and the speed reducer comprises:
a planetary gearbox according to any one of the preceding claims;
the output end of the driving piece 1 is connected with the input end of the planetary gear box.
The output end of the driving piece 1 is connected with the input end of the planetary gear box, the driving piece 1 can be a motor, and the motor is connected with the connecting port through a terminal wire to supply power for the planetary gear box.
The output end of the driving piece 1 is connected with the input end of the planetary gear box, specifically, the output shaft of the driving piece 1 is connected with the power shaft of the sun gear 14 to transmit power, and the output shaft and the power shaft can be connected through a connecting flange or a coupling.
On the basis of the above embodiment, a second spacer 13 is provided between the housing 2 and the output end of the driver 1, and a gap is provided between the end of the ball bearing 6 close to the driver 1 and the second spacer 13.
Referring to fig. 1, fig. 2, fig. 4, and fig. 5, a second gasket 13 is disposed between the housing 2 and the output end of the driving member 1, where the second gasket 13 can ensure stability of operation when the gear box and the driving member 1 transmit power, the ball bearing 6 is close to one end of the driving member 1, i.e. the left end of the ball bearing 6, where the ball bearing 6 refers to the ball bearing 6 at the leftmost end of the transmission assembly, and a certain gap is disposed between the left end of the ball bearing 6 and the second gasket 13, so as to avoid collision friction between the ball bearing 6 and the gasket, resulting in damage and failure of the bearing, and affecting use of the gear box.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.
The planetary gear box and the speed reducer provided by the utility model are described in detail above. The principles and embodiments of the present utility model have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present utility model and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the utility model can be made without departing from the principles of the utility model and these modifications and adaptations are intended to be within the scope of the utility model as defined in the following claims.
Claims (10)
1. A planetary gearbox, comprising:
a shell (2) with a transmission component inside;
the transmission assembly includes:
the head end gear set comprises at least one planetary gear set, wherein the planetary gear set comprises a first planet carrier (5) and first planet gears (7) connected with the first planet carrier, and a ball bearing (6) is arranged between a first optical axis (51) of the first planet carrier (5) and the first planet gears (7);
the tail end gear set is arranged at the tail end of the transmission assembly and comprises a second planet carrier (8) and a second planet wheel (9) connected with the second planet carrier, a rolling element (10) is arranged between a second optical axis (81) of the second planet carrier (8) and the second planet wheel (9), and the rolling element (10) is a needle roller or a needle roller bearing;
the sun gear (14) is arranged in the head gear set and the tail gear set, the sun gear (14) is meshed with the first planet gear (7) or the second planet gear (9).
2. A planetary gearbox according to claim 1, characterised in that at least two of the ball bearings (6) are arranged in a spaced apart relationship between the first optical axis (51) and the first planet (7).
3. A planetary gearbox according to claim 2, characterised in that a first stop (12) is provided between two adjacent ball bearings (6) for limiting the deflection of the ball bearings (6).
4. A planetary gearbox according to claim 3, characterised in that the first stop (12) is a spacer or bushing.
5. The planetary gearbox according to claim 4, characterized in that a first spacer (11) is clamped at the head end of the second optical axis (81), and the second planet wheel (9) is arranged between the first spacer (11) and the second planet carrier (8).
6. A planetary gearbox according to claim 5, characterised in that a gap is provided between the end of the ball bearing (6) close to the first planet carrier (5) and the first planet carrier (5).
7. A planetary gearbox according to any of claims 1-6, characterised in that the end gear set is connected at its end with an output shaft (4) for power output of the end gear set.
8. The planetary gearbox according to claim 7, characterized in that a rear end cover (3) is arranged at the tail end of the housing (2), the output shaft (4) passes through the rear end cover (3) and a second limiting piece (15) is sleeved outside.
9. A speed reducer, characterized by comprising:
a planetary gearbox according to any one of claims 1 to 8;
the driving piece (1), the output of driving piece (1) with the input of planetary gear box is connected.
10. A reducer according to claim 9, characterized in that a second spacer (13) is provided between the housing (2) and the output end of the driving member (1), and that a gap is provided between the end of the ball bearing (6) close to the driving member (1) and the second spacer (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322167049.3U CN220551443U (en) | 2023-08-11 | 2023-08-11 | Planetary gear box and speed reducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322167049.3U CN220551443U (en) | 2023-08-11 | 2023-08-11 | Planetary gear box and speed reducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220551443U true CN220551443U (en) | 2024-03-01 |
Family
ID=90002204
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322167049.3U Active CN220551443U (en) | 2023-08-11 | 2023-08-11 | Planetary gear box and speed reducer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220551443U (en) |
-
2023
- 2023-08-11 CN CN202322167049.3U patent/CN220551443U/en active Active
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