CN112524207A - Installation method of duplex planetary gear of external-meshing planetary gear mechanism - Google Patents
Installation method of duplex planetary gear of external-meshing planetary gear mechanism Download PDFInfo
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- CN112524207A CN112524207A CN202011571958.8A CN202011571958A CN112524207A CN 112524207 A CN112524207 A CN 112524207A CN 202011571958 A CN202011571958 A CN 202011571958A CN 112524207 A CN112524207 A CN 112524207A
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- 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
- F16H1/00—Toothed gearings for conveying rotary motion
- F16H1/28—Toothed gearings for conveying rotary motion with gears having orbital motion
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- 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
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/023—Mounting or installation of gears or shafts in the gearboxes, e.g. methods or means for assembly
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- 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
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- 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
- F16H1/00—Toothed gearings for conveying rotary motion
- F16H1/28—Toothed gearings for conveying rotary motion with gears having orbital motion
- F16H2001/2881—Toothed gearings for conveying rotary motion with gears having orbital motion comprising two axially spaced central gears, i.e. ring or sun gear, engaged by at least one common orbital gear wherein one of the central gears is forming the output
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Retarders (AREA)
- General Details Of Gearings (AREA)
Abstract
The patent provides a method for installing a duplex planetary gear of an external-meshing planetary gear mechanism, which uses the friction force generated by the interference fit of two independent planetary gears and a shaft-shaped member, or the friction force generated by the interference fit of one planetary gear and a shaft-shaped member and the interference fit of the other planetary gear and the shaft-shaped member, so as to realize the arbitrary angle alignment between the two planetary gears. The duplex planetary gear at least comprises two groups of planetary gears, wherein the two planetary gears are two independent external gears, the two planetary gears are in interference fit with a shaft-shaped member together, or one planetary gear and the shaft-shaped member are integrated, and the other planetary gear is in interference fit with the shaft-shaped member; the opposite end surfaces of the two planetary gears are welded, or the planetary gears which form interference fit with the outer cylindrical surface of the shaft-shaped member are welded with the shaft-shaped member, and before welding, the angular phase positioning of the teeth of the two planetary gears is realized through the interference fit of the planetary gears and the shaft-shaped member.
Description
Technical Field
The patent refers to the field of 'gearing'.
Background
With the increasingly wide use of the motor, the speed reducer becomes a key part for matching between the motor and a driving object, the conventional external meshing cylindrical gear is simple to process, low in cost and capable of achieving high precision and efficiency, but the reduction ratio of the transmission is small, and the structure is not suitable for the speed reducer with a large transmission ratio. In addition, although the planetary gear reducer with the inner gear ring can realize a large transmission ratio and has a small volume, the inner gear ring is complex in machining process, high in cost and difficult to achieve high precision. The externally-meshed planetary gear mechanism has the advantages of the two speed reducers, for example, the Chinese patent application with the application number of 202011028443 and the name of a coaxial speed reducing motor adopts the speed reducer of the externally-meshed planetary gear mechanism, each group of planetary gears of the speed reducer comprises a first planetary gear and a second planetary gear which are respectively meshed with a first sun gear and a second sun gear, and the first planetary gear and the second planetary gear are coaxially fixed and are rotatably arranged on a planet carrier. However, in the external-meshing planetary gear mechanism, since different phase angles (relative circumferential positions between the planetary gears) are required between the plurality of sets of the double planetary gears, it is difficult to process the double gears in which the first planetary gear and the second planetary gear are integrated, and the phase angle is not easily ensured.
Disclosure of Invention
The patent provides a method for installing a duplex planetary gear of an external meshing planetary gear mechanism, which solves the positioning problem of two planetary gears in the duplex planetary gear, an integrated duplex planetary gear is not needed, the method uses two independent planetary gears to generate friction force by interference fit with a shaft-shaped member together, or one planetary gear is connected with a shaft-shaped member integrally, the other planetary gear and the shaft-shaped member generate friction force by interference fit, the two planetary gears are kept at a required phase angle, and thus, any angle alignment between the two planetary gears can be realized.
This patent external toothing planetary gear mechanism's duplex planetary gear installation method, duplex planetary gear include two sets of planetary gears at least, and every group planetary gear includes two planetary gears that coaxial fixed links to each other i.e. first planetary gear, second planetary gear, characterized by: the two planetary gears are two independent external gears, the two planetary gears are in interference fit with the outer cylindrical surface of a shaft-shaped component together, or one planetary gear is integrated with the shaft-shaped component, and the other planetary gear is in interference fit with the outer cylindrical surface of the shaft-shaped component; the opposite end surfaces of the two planetary gears are welded, or the planetary gears which form interference fit with the outer cylindrical surface of the shaft-shaped component are welded with the shaft-shaped component, or the two parts are welded simultaneously; before welding, the angular phase positioning of the teeth of the two planet gears is realized through the interference fit of the planet gears and the shaft-shaped member.
According to the installation method of the duplex planetary gear structure, when the two planetary gears are in interference fit with the outer cylindrical surface of a shaft-shaped component, the two planetary gears are provided with inner holes, and the inner holes of the two planetary gears are in interference fit with the outer cylindrical surface of the shaft-shaped component; the shaft-like member is rotatably provided on the carrier.
In the installation method of the duplex planetary gear structure, the shaft-shaped component is a pipe. Preferably, the planetary gear set further comprises a central shaft fixed on the planetary carrier, and the pipe fitting is rotatably arranged on the central shaft.
In the method for mounting the duplex planetary gear structure, the shaft-shaped member is an equal-diameter shaft.
In the installation method of the duplex planetary gear structure, the shaft-shaped component is a step shaft.
In the installation method of the duplex planetary gear structure, when one planetary gear is integrated with a shaft-shaped member and the other planetary gear is in interference fit with the outer cylindrical surface of the shaft-shaped member, the shaft-shaped member is rotatably arranged on the planetary carrier. Such a structure is simpler.
In the installation method of the duplex planetary gear structure, when one planetary gear is integrated with a shaft-shaped member and the other planetary gear is in interference fit with the outer cylindrical surface of the shaft-shaped member, the shaft-shaped member is fixed on the transition shaft through the central through hole of the shaft-shaped member, and the transition shaft is rotatably arranged on the planet carrier.
When one planetary gear is integrated with a shaft-shaped component and the other planetary gear is in interference fit with the outer cylindrical surface of the shaft-shaped component, the installation method of the duplex planetary gear structure also comprises a central shaft fixed on the planet carrier, and the shaft-shaped component is rotatably arranged on the central shaft through a central through hole of the shaft-shaped component.
When the two planet gears are in interference fit with the outer cylindrical surface of a shaft-shaped member together, the installation method of the duplex planet gear structure further comprises the step of fixedly connecting the connecting sleeve on the shaft-shaped member, and the two planet gears are in interference fit with the connecting sleeve together. The connecting sleeve can now also axially position the two planet gears.
The beneficial effect of this patent: the duplex planetary gear of the patent adopts two independent planetary gears instead of an integrated structure which is difficult to process. When the double-connection planetary gear set is installed, the two planetary gears in each group of double-connection planetary gears are in interference fit with the shaft-shaped member, so that the two planetary gears keep fixed relative positions in the circumferential direction, the two planetary gears are kept at a required phase angle, then the opposite end faces of the two planetary gears are welded, or/and the inner hole of any one planetary gear is welded with the outer cylindrical face of the shaft-shaped member at the joint of the end faces. The method is simple and reliable, excessive gear types do not need to be produced, only two gears are processed, the production process is greatly simplified, the production cost is reduced, and the production efficiency is improved.
Drawings
Fig. 1 is a schematic view of an external-engagement planetary gear mechanism of embodiment 1;
FIG. 2 is a schematic view showing the connection of two planetary gears with a pipe member and the like in embodiment 1;
FIG. 3 is a schematic view showing connection of two planetary gears with planetary gear shafts and the like of embodiment 2;
FIG. 4 is a schematic view showing connection of two planetary gears with planetary gear shafts and the like of embodiment 3;
FIG. 5 is a schematic view showing connection of two planetary gears and planetary gear shafts and the like of embodiment 4;
FIG. 6 is a schematic view showing connection of two planetary gears to a planetary gear shaft and the like of embodiment 5;
FIG. 7 is a schematic view showing connection of two planetary gears and planetary gear shafts and the like of embodiment 6;
FIG. 8 is a schematic view showing connection of two planetary gears to planetary gear shafts and the like of embodiment 7;
FIG. 9 is a schematic view showing the connection of two planetary gears of embodiment 8 to a pipe member or the like;
fig. 10 is a schematic view showing connection of two planetary gears and a pipe member and the like of embodiment 9.
Detailed Description
Example 1:
referring to fig. 1, the external-engagement planetary gear mechanism mainly comprises a housing 1, a first sun gear 2, a second sun gear 3, a first planetary gear 4, a second planetary gear 5 and a planet carrier 6. The first sun gear 2 fixed to the housing 1 and the second sun gear 3 rotating relative to the housing via the bearing 14 are axially aligned.
The first and second planetary gears 4, 5 are two gears that are independently machined and each have an internal bore 41, 51, respectively.
The first planetary gear 4 and the second planetary gear 5 are respectively meshed with the first sun gear 2 and the second sun gear 3, and the first planetary gear and the second planetary gear are coaxially and fixedly connected to form a planetary gear set. The planet shafts 7 are fixed to the carrier 6.
Referring to fig. 2, a pipe member 8 as a shaft-like member is rotatably provided on the planetary gear shaft 7 through a bearing 15, and inner bores of the first planetary gear 4 and the second planetary gear 5 are in interference fit with an outer cylindrical surface of the pipe member 8. During assembly, the circumferential positioning of the planetary gear is realized through the interference fit of the planetary gear and the pipe fitting 8. Then, the opposite end faces 9 of the first planetary gear and the second planetary gear are welded, or the inner hole 41 of the first planetary gear and the outer cylindrical surface of the pipe member 8 are welded at the seam 10 of the end face joint, or the inner hole 51 of the second planetary gear and the outer cylindrical surface of the pipe member 8 are welded at the seam 11 of the end face joint. The welding position can be any one position, two positions or three positions.
Example 2:
referring to fig. 3, the main difference from embodiment 1 is that: the equal-diameter planetary gear shafts 7 as shaft-like members are rotatably provided on the carrier via bearings 16. Inner holes of the first planetary gear 4 and the second planetary gear 5 are in interference fit with an outer cylindrical surface of the planetary gear shaft 7. During assembly, the circumferential positioning of the planetary gear is realized through the interference fit of the planetary gear and the planetary gear shaft 7. Then, the opposite end faces 9 of the first planet gear and the second planet gear are welded, or the inner hole 41 of the first planet gear is welded with the outer cylindrical surface of the planet gear shaft 7 at the seam 12 of the end face joint, or the inner hole 51 of the second planet gear is welded with the outer cylindrical surface of the planet gear shaft 7 at the seam 13 of the end face joint. The welding position can be any one position, two positions or three positions.
Example 3:
referring to fig. 4, the main difference from embodiment 2 is that: the planet gear shaft 7 is a stepped shaft with unequal diameters, and a step is respectively arranged between the outer cylindrical surface of the two ends of the planet gear shaft 7 where the bearings 16 are arranged and the outer cylindrical surface where the two planet gears are arranged.
Example 4:
referring to fig. 5, the main difference from embodiment 2 is that: the planet gear shaft 7 is a stepped shaft with unequal diameters, a step is arranged between the outer cylindrical surface of the right end of the planet gear shaft 7 where the bearing 16 is installed and the outer cylindrical surface where the first planet gear is installed, and a step is also arranged between the outer cylindrical surfaces where the two planet gears are installed.
Example 5:
referring to fig. 6, the main difference from embodiment 2 is that: the planet gear shaft 7 is a step shaft with unequal diameters, a step is respectively arranged between the outer cylindrical surface of the two ends of the planet gear shaft 7 where the bearings 16 are arranged and the outer cylindrical surface where the two planet gears are arranged, and a step is also arranged between the outer cylindrical surfaces where the two planet gears are arranged.
Example 6:
referring to fig. 7, the main difference from embodiment 3 is that: the planetary gear transmission mechanism further comprises a connecting sleeve 17 fixedly connected to the planetary gear shaft 7, and two ends of the connecting sleeve 17 are in interference fit with inner holes of the first planetary gear 4 and the second planetary gear 5 respectively.
During assembly, the circumferential positioning of the planetary gear is realized through the interference fit of the planetary gear, the planetary gear shaft 7 and the connecting sleeve 17. Then, the opposite end surfaces 9 of the first planetary gear and the second planetary gear are welded, or the inner hole of the first planetary gear and the outer cylindrical surface of the planetary gear shaft 7 are welded at the seam 12 of the end surface joint, or the inner hole of the second planetary gear and the outer cylindrical surface of the planetary gear shaft 7 are welded at the seam 13 of the end surface joint. The welding position can be any one position, two positions or three positions.
Example 7:
referring to fig. 8, the second planetary gear 5 is of an integral structure with a solid shaft as a shaft-like member 7, the first planetary gear 4 is interference-fitted with an outer cylindrical surface of the shaft-like member 7, and both ends of the shaft-like member are rotatably provided on the carrier via bearings 16.
When assembled, the first planet gears 4 are circumferentially positioned by interference fit of the first planet gears 4 with the shaft like member 7 such that the two planet gears are maintained at a desired phase angle. Then, the opposite end faces 9 of the first planet gear and the second planet gear are welded, or the inner hole of the first planet gear and the outer cylindrical surface of the shaft-shaped component 7 are welded at the seam 10 of the end face combination. The welding position can be any one or two positions.
Example 8:
referring to fig. 9, the second planetary gear 5 is of an integral structure with the pipe 8 as a shaft-like member, the first planetary gear 4 is in interference fit with the outer cylindrical surface of the pipe 8, the pipe 8 is fixed on the transition shaft 18 through the central through hole thereof, and both ends of the transition shaft are rotatably disposed on the carrier through bearings 16.
When assembled, the first planet gears 4 are circumferentially positioned by interference fit of the first planet gears 4 with the shaft like member 7 such that the two planet gears are maintained at a desired phase angle. Then, the opposite end faces 9 of the first planetary gear and the second planetary gear are welded, or the inner hole of the first planetary gear and the outer cylindrical surface of the pipe member 8 are welded at the seam 12 of the end face combination. The welding position can be any one or two positions.
Example 9:
referring to fig. 10, the second planetary gear 5 is of an integral structure with the pipe member 8 as a shaft-like member, the first planetary gear 4 is interference-fitted with an outer cylindrical surface of the pipe member 8, the pipe member 8 is rotatably provided on a center shaft 19 through a bearing 15, and the center shaft 19 is fixed to a carrier.
During assembly, the first planetary gear 4 is circumferentially positioned by interference fit of the first planetary gear 4 and the pipe 8, so that the two planetary gears are kept at a required phase angle. Then, the opposite end faces 9 of the first planetary gear and the second planetary gear are welded, or the inner hole of the first planetary gear and the outer cylindrical surface of the pipe member 8 are welded at the seam 12 of the end face combination. The welding position can be any one or two positions.
The duplex planetary gear is composed of two independent external gears, two planetary gears are in interference fit with the shaft-shaped member, or one planetary gear is in interference fit with the shaft-shaped member, the other planetary gear is integrally connected with the shaft-shaped member, the angular phase positions of the two planetary gears before welding are realized through the friction force generated by the interference fit, and the two planetary gears are welded on the opposite end surfaces of at least two planetary gears, or the joint gaps of the two planetary gears which are respectively flush with the end surfaces of the shaft-shaped member, or the two planetary gears are welded at the same time.
The welding can be laser welding, plasma welding and the like, and the welding process does not influence the protection scope of the claims of the patent; the welding positions can be respectively adopted or simultaneously adopted, which does not influence the protection scope of the claims of the patent;
the friction force generated by interference fit is used for keeping the two planetary gears at the required phase angle, and the mode can realize the alignment of any angle between the two planetary gears, so that when in processing and production, the excessive gear types are not needed, only two planetary gears are processed, the production process is greatly simplified, the production cost is reduced, and the production efficiency is improved.
Claims (10)
1. The duplex planetary gear installation method of the external engagement planetary gear mechanism, the duplex planetary gear includes two groups of planetary gears at least, every group planetary gear includes two planetary gears that the coaxial fixed links is first planetary gear, second planetary gear, its characteristic is: the two planetary gears are two independent external gears, the two planetary gears are in interference fit with the outer cylindrical surface of a shaft-shaped component together, or one planetary gear is integrated with the shaft-shaped component, and the other planetary gear is in interference fit with the outer cylindrical surface of the shaft-shaped component; the opposite end surfaces of the two planetary gears are welded, or the planetary gears which form interference fit with the outer cylindrical surface of the shaft-shaped component are welded with the shaft-shaped component, or the two parts are welded simultaneously; before welding, the angular phase positioning of the teeth of the two planet gears is realized through the interference fit of the planet gears and the shaft-shaped member.
2. The tandem planetary gear installation method according to claim 1, wherein: when the two planetary gears are in interference fit with the outer cylindrical surface of a shaft-shaped component, the two planetary gears are provided with inner holes, and the inner holes of the two planetary gears are in interference fit with the outer cylindrical surface of the shaft-shaped component; the shaft-like member is rotatably provided on the carrier.
3. The twin planetary gear installation method of claim 2, wherein: the shaft-like member is a tube.
4. The twin planetary gear installation method of claim 2, wherein: it still includes the center pin of fixing on the planet carrier, and the pipe fitting rotates to be set up on the center pin.
5. The tandem planetary gear installation method according to claim 1, wherein: the shaft-like member is an equal diameter shaft.
6. The tandem planetary gear installation method according to claim 1, wherein: the shaft-like member is a stepped shaft.
7. The tandem planetary gear installation method according to claim 1, wherein: when one of the planet gears is integral with a shaft-like member and the other planet gear is in interference fit with the outer cylindrical surface of the shaft-like member, the shaft-like member is rotatably disposed on the planet carrier.
8. The tandem planetary gear installation method according to claim 1, wherein: when one planetary gear is integrated with a shaft-shaped member and the other planetary gear is in interference fit with the outer cylindrical surface of the shaft-shaped member, the shaft-shaped member is fixed on a transition shaft through the central through hole of the shaft-shaped member, and the transition shaft is rotatably arranged on a planet carrier.
9. The tandem planetary gear installation method according to claim 1, wherein: when one planetary gear is integrated with a shaft-shaped component, and the other planetary gear is in interference fit with the outer cylindrical surface of the shaft-shaped component, the planetary gear further comprises a central shaft fixed on the planet carrier, and the shaft-shaped component is rotatably arranged on the central shaft through a central through hole of the shaft-shaped component.
10. The tandem planetary gear installation method according to claim 1, wherein: when the two planetary gears are in interference fit with the outer cylindrical surface of a shaft-shaped member together, the planetary gear set further comprises a connecting sleeve fixedly connected to the shaft-shaped member, and the two planetary gears are in interference fit with the connecting sleeve together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011571958.8A CN112524207A (en) | 2020-12-27 | 2020-12-27 | Installation method of duplex planetary gear of external-meshing planetary gear mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011571958.8A CN112524207A (en) | 2020-12-27 | 2020-12-27 | Installation method of duplex planetary gear of external-meshing planetary gear mechanism |
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| CN112524207A true CN112524207A (en) | 2021-03-19 |
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| CN202011571958.8A Pending CN112524207A (en) | 2020-12-27 | 2020-12-27 | Installation method of duplex planetary gear of external-meshing planetary gear mechanism |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115574055A (en) * | 2022-09-23 | 2023-01-06 | 江苏欧邦电机制造有限公司 | Variation planetary transmission device with small tooth difference |
| EP4321776A1 (en) * | 2022-08-12 | 2024-02-14 | Aerospace Transmission Technologies GmbH | Multi-row gear wheel device and method and device for producing same |
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| CN112072849A (en) * | 2020-09-26 | 2020-12-11 | 南京好龙电子有限公司 | Coaxial speed reducing motor |
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2020
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| WO2005083300A1 (en) * | 2004-02-18 | 2005-09-09 | Daimlerchrysler Ag | Toroidal gearbox for a motor vehicle |
| JP2005343205A (en) * | 2004-05-31 | 2005-12-15 | Koyo Seiko Co Ltd | Steering device for vehicle |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4321776A1 (en) * | 2022-08-12 | 2024-02-14 | Aerospace Transmission Technologies GmbH | Multi-row gear wheel device and method and device for producing same |
| CN115574055A (en) * | 2022-09-23 | 2023-01-06 | 江苏欧邦电机制造有限公司 | Variation planetary transmission device with small tooth difference |
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Application publication date: 20210319 |