CN220540217U - Planetary gear reduction box - Google Patents
Planetary gear reduction box Download PDFInfo
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- CN220540217U CN220540217U CN202322367434.2U CN202322367434U CN220540217U CN 220540217 U CN220540217 U CN 220540217U CN 202322367434 U CN202322367434 U CN 202322367434U CN 220540217 U CN220540217 U CN 220540217U
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- 239000003638 chemical reducing agent Substances 0.000 claims description 6
- 239000011295 pitch Substances 0.000 claims description 6
- 238000006073 displacement reaction Methods 0.000 claims description 2
- 230000007246 mechanism Effects 0.000 abstract description 14
- 230000007306 turnover Effects 0.000 abstract description 7
- 230000005540 biological transmission Effects 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
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- 230000003014 reinforcing effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
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Abstract
The utility model relates to reduction transmission, and provides a planetary gear reduction box, which mainly comprises a sun gear, a planetary gear and an inner gear ring; the inner gear ring consists of a movable inner gear ring and a fixed inner gear ring, and the planetary gear drives the movable inner gear ring to rotate at a reduced speed through the tooth pitch difference of the movable inner gear ring and the fixed inner gear ring; when the sun gear is input, the planetary gear rotates between the inner gear ring and the sun gear, and the movable inner gear ring is driven to output by utilizing the tooth pitch difference of the movable inner gear ring and the fixed inner gear ring; when the movable annular gear is used as input, the planetary gear is locked by the fixed annular gear, and the sun gear cannot be driven to output, so that the self-locking mechanism is realized. The utility model has the advantages of great reduction ratio, simple structure, easy manufacture and high mechanical reliability. The tooth pitch difference between the fixed annular gear and the movable annular gear not only realizes large reduction ratio, but also realizes high-efficiency self-locking, has high self-locking reliability, and is suitable for a large-scale turnover mechanism.
Description
Technical Field
The utility model relates to the field of reduction transmission, and particularly provides a planetary gear reduction box capable of realizing high-efficiency self-locking.
Background
In the transmission, it is often necessary to reduce the high rotational speed of a prime mover such as an electric motor to a low speed and high torque output in order to operate various mechanisms such as a driving part of an industrial machine, a large-sized turning mechanism, a rotary valve of a reservoir gate, a rotator of a rudder of a ship, and the like. However, in general gear reducers, due to structural limitation, single-stage reduction is relatively small, so that multi-stage reduction is often adopted to meet the reduction requirement, but the reduction gear can cause the reduction gear to be quite large in size, extremely heavy and high in structural complexity. In addition, existing reducers generally do not have a self-locking function or have weak self-locking capability.
Besides the gear reducer, the speed reduction can be performed through a worm gear, and the worm gear has a self-locking function, but the single-stage reduction ratio is smaller, the speed reduction efficiency is lower, and the mechanical reliability is poor. The existing speed reducer is difficult to meet the requirement of a large-scale turnover mechanism, and after the turnover mechanism is unfolded, the turnover mechanism is extremely easy to reverse under the action of gravity due to insufficient self-locking capability of the speed reducer.
Disclosure of Invention
The utility model provides a planetary gear reduction box capable of realizing high-efficiency self-locking, which is characterized in that a movable annular gear is added on the basis of the traditional planetary gear reduction box, the fixed annular gear and the movable annular gear are coaxially connected, and the planetary gear is driven by the movable annular gear to rotate at a reduced speed through the tooth pitch difference of the fixed annular gear and the movable annular gear; when the movable annular gear is used as input, the planetary gear is locked by the fixed annular gear, and the sun gear cannot be driven to output, so that the self-locking mechanism is realized.
The planetary gear reduction box provided by the utility model comprises: sun gears, planet gears, and ring gears;
the inner gear ring comprises a movable inner gear ring and a fixed inner gear ring, the inner diameter sizes, tooth profile curves, pressure angles and reference circle diameters of the movable inner gear ring and the fixed inner gear ring are the same, and the tooth pitches of the movable inner gear ring and the fixed inner gear ring are different;
the sun gear, the movable annular gear and the fixed annular gear are coaxially arranged;
the planet gears are meshed between the sun gear and the ring gear.
Preferably, the number of teeth of the movable ring gear is equal to the difference between the number of teeth of the fixed ring gear and the number of teeth of the planetary gear.
Preferably, the number of the planetary gears is not less than 3.
Preferably, the tooth thickness of the planetary gear is greater than or equal to the sum of the tooth thicknesses of the movable ring gear and the fixed ring gear.
Preferably, the planetary gear further comprises a planetary gear carrier, and the planetary gear is arranged on the planetary gear carrier through a rotating shaft and used for limiting the axial displacement of the planetary gear.
Compared with the prior art, the utility model has the following beneficial effects:
compared with the existing speed reducing mechanism, the speed reducing mechanism has the advantages that the speed reducing ratio is extremely large, multi-stage speed reduction is not needed, the structure is simple, the manufacturing is easy, the speed reducing output can be realized only through gear meshing, and the mechanical reliability is high. In addition, the utility model realizes large reduction ratio and high-efficiency self-locking through the tooth pitch difference of the fixed annular gear and the movable annular gear, has high self-locking reliability and is suitable for a large-scale turnover mechanism.
Drawings
Fig. 1 is an overall construction diagram of a planetary gear reduction box provided according to an embodiment of the present utility model;
FIG. 2 is an internal structural view of a planetary reduction gearbox provided according to an embodiment of the present utility model;
fig. 3 is a schematic diagram of a positional relationship between a movable ring gear and a fixed ring gear according to an embodiment of the present utility model;
FIG. 4 is a block diagram of a planet carrier provided in accordance with an embodiment of the present utility model;
fig. 5 is a structural view of a sun gear provided according to an embodiment of the present utility model.
Wherein reference numerals include:
sun gear 1, movable ring gear 2, fixed ring gear 3, planetary gear 4, planetary gear carrier 5.
Detailed Description
Hereinafter, embodiments of the present utility model will be described with reference to the accompanying drawings. In the following description, like modules are denoted by like reference numerals. In the case of the same reference numerals, their names and functions are also the same. Therefore, a detailed description thereof will not be repeated.
In order to make the objects, technical solutions and advantages of the present utility model more apparent, the present utility model will be further described in detail with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not to be construed as limiting the utility model.
Fig. 1 shows an overall structure of a planetary gear reduction box provided according to an embodiment of the present utility model.
Fig. 2 shows an internal structure of a planetary gear reduction box provided according to an embodiment of the present utility model.
Fig. 3 illustrates a positional relationship of a movable ring gear and a fixed ring gear provided according to an embodiment of the present utility model.
As shown in fig. 1, 2 and 3, the planetary gear reduction box provided by the embodiment of the utility model comprises a sun gear 1, an annular gear, a planetary gear 4 and a planetary gear carrier 5, wherein:
the inner gear ring is composed of a movable inner gear ring 2 and a fixed inner gear ring 3, the inner diameters of the movable inner gear ring 2 and the fixed inner gear ring 3 are the same, the tooth profile curve, the pressure angle and the reference circle diameter are the same, and the difference is that the tooth pitches of the two are different, in other words, the tooth numbers of the two are also different. The movable annular gear 2 and the fixed annular gear 3 are arranged side by side and are coaxially arranged with the sun gear 1. There is a certain space between the internal diameter of the ring gear and the external diameter of the sun gear 1 for installing the planet gears 4, the number of the planet gears 4 is 4, and the axes of the four planet gears 4 are parallel to each other and are meshed between the sun gear 1 and the ring gear. In addition, the tooth thickness of the planet gear 4 is greater than or equal to the sum of the tooth thicknesses of the movable ring gear 2 and the fixed ring gear 3, and the planet gear 4 is fully meshed with the sun gear 1. The planetary gear 4 is mounted on a planetary gear carrier 5 through a rotating shaft for limiting the planetary gear 4.
Fig. 4 shows a structure of a planetary carrier provided according to an embodiment of the present utility model.
As shown in fig. 4, the planetary gear carrier 5 mainly includes annular limiting plates on two sides and reinforcing ribs between the limiting plates, limiting grooves are formed between adjacent reinforcing ribs, the planetary gears 4 are installed in the limiting grooves through holes in the limiting plates, the annular limiting plates on two sides are used for limiting the planetary gears 4 to axially displace, meanwhile, hard objects are prevented from entering the inside, and the mechanism stops rotating and even damages gear teeth.
Fig. 5 shows a structure of a sun gear provided according to an embodiment of the present utility model.
As shown in fig. 5, the number of teeth of the sun gear 1 is a, the number of teeth of the fixed ring gear 3 is b, the number of teeth of the planet gears 4 is c, and the number of teeth of the movable ring gear 2 is equal to the difference between the number of teeth of the fixed ring gear 3 and the number of teeth of the planet gears 4, that is, the number of teeth of the movable ring gear 2 is (b-c).
When the planetary gear reduction box works normally, the sun gear 1 is used as input, the sun gear 1 rotates to drive the planet gear 4 to rotate, the planet gear 4 transmits motion to the inner gear ring, the fixed inner gear ring 3 does not rotate relatively, therefore, the planet gear 4 revolves around a shaft while rotating between the inner gear ring and the sun gear 1, and as the tooth pitch difference exists between the movable inner gear ring 4 and the fixed inner gear ring 3, the tooth profile curve, the pressure angle and the reference circle diameter of the movable inner gear ring 4 and the fixed inner gear ring 3 are the same, and therefore, in the rotation process of the planet gear 4, the movable inner gear ring 4 rotates, namely, the input of the sun gear 1 is output at a reduced speed, and the transmission ratio of the planetary gear reduction box can be calculated according to the tooth number provided by the above:
((a+b)/a)*c/(b-c)＝(ac+bc)/(ab-ac)。
compared with the existing mechanism, the planetary gear reduction box provided by the utility model has the advantages of high speed reduction efficiency, simple structure, fewer parts and extremely low possibility of failure.
In addition, the planetary gear reduction box provided by the utility model also has a high-efficiency self-locking function, taking a large turnover mechanism as an example, after the normal turnover transmission taking the sun gear 1 as an input is finished, the structure driven by the planetary gear reduction box can generate a reverse torque under the action of external forces such as gravity or thrust after reaching a designated position, namely the movable annular gear 2 generates an input torque at the moment, and the movable annular gear 2 can transfer the torque to the planetary gear 4, but at the moment, the planetary gear 4 is locked by the fixed annular gear 3 and cannot rotate, so that the sun gear 1 cannot be driven to output, and the reverse rotation is restrained, so that the high-efficiency self-locking function is realized.
The planetary gear reduction box is applied to a domestic reflective imaging interference station, is used for turning large reflectors on two sides of a guide frame, is a civil device and is used for preventing a civil base, a fuel warehouse, an oil depot and the like from being optically shot.
While embodiments of the present utility model have been illustrated and described above, it will be appreciated that the above described embodiments are illustrative and should not be construed as limiting the utility model. Variations, modifications, alternatives and variations of the above-described embodiments may be made by those of ordinary skill in the art within the scope of the present utility model.
The above embodiments of the present utility model do not limit the scope of the present utility model. Any other corresponding changes and modifications made in accordance with the technical idea of the present utility model shall be included in the scope of the claims of the present utility model.
Claims (5)
1. A planetary gear reduction box, comprising: sun gears, planet gears, and ring gears;
the inner gear ring comprises a movable inner gear ring and a fixed inner gear ring, the inner diameter sizes, tooth profile curves, pressure angles and reference circle diameters of the movable inner gear ring and the fixed inner gear ring are the same, and the tooth pitches of the movable inner gear ring and the fixed inner gear ring are different;
the sun gear, the movable annular gear and the fixed annular gear are coaxially arranged;
the planet gears are meshed between the sun gear and the ring gear.
2. The planetary reduction gearbox of claim 1, wherein the number of teeth of the movable ring gear is equal to the difference between the number of teeth of the fixed ring gear and the planetary gear.
3. The planetary gear reducer of claim 1, wherein the number of planetary gears is not less than 3.
4. The planetary gear reduction box according to claim 1, wherein the tooth thickness of the planetary gear is greater than or equal to the sum of tooth thicknesses of the movable ring gear and the fixed ring gear.
5. A planetary gear reduction box according to claim 1 or 3, further comprising a planetary gear carrier on which the planetary gears are mounted by means of a rotating shaft for limiting axial displacement of the planetary gears.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322367434.2U CN220540217U (en) | 2023-08-31 | 2023-08-31 | Planetary gear reduction box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322367434.2U CN220540217U (en) | 2023-08-31 | 2023-08-31 | Planetary gear reduction box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220540217U true CN220540217U (en) | 2024-02-27 |
Family
ID=89970165
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322367434.2U Active CN220540217U (en) | 2023-08-31 | 2023-08-31 | Planetary gear reduction box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220540217U (en) |
-
2023
- 2023-08-31 CN CN202322367434.2U patent/CN220540217U/en active Active
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