CN218882951U - Transmission mechanism with replaceable transmission ratio - Google Patents
Transmission mechanism with replaceable transmission ratio Download PDFInfo
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- CN218882951U CN218882951U CN202222719834.0U CN202222719834U CN218882951U CN 218882951 U CN218882951 U CN 218882951U CN 202222719834 U CN202222719834 U CN 202222719834U CN 218882951 U CN218882951 U CN 218882951U
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- 238000003466 welding Methods 0.000 claims description 3
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- 238000012986 modification Methods 0.000 description 2
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- 230000009347 mechanical transmission Effects 0.000 description 1
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Abstract
The utility model relates to a drive mechanism of removable drive ratio, including drive assembly, output, drive assembly connects between drive assembly and output, drive assembly is planetary gear box, is equipped with the planet wheel shaft hole of a plurality of different centre distances of multiunit on the third support that this planetary gear box and output are connected, and this planet wheel shaft hole is used for the planet wheel installation of different drive ratios. Compared with the prior art, the utility model has the advantages of improved drive mechanism's mechanism compactness effectively, reduced drive mechanism's volume and the part quantity with series products.
Description
Technical Field
The utility model belongs to the technical field of mechanical transmission technique and specifically relates to a drive mechanism of removable drive ratio is related to.
Background
The driving mechanism and the micro planetary gear transmission are used as a precise transmission mode and widely applied to various engineering fields, but the requirements on output torque and rotating speed may change due to the requirements of different application scenes. The existing driving mechanism is matched with the planetary gear in a transmission mode, the transmission ratio of the gear mechanism is usually fixed, and the design of the single transmission ratio is usually limited in application when the application scene is changed.
Therefore, how to carry out transmission ratio changeable design on the output component of the planetary gear transmission mechanism is achieved, the requirements of the planetary gear transmission mechanism in different application scenes are further met under the requirement of simple and compact transmission structure, and meanwhile, the number of parts is reduced, stress release of a planet carrier is facilitated, and the technical problem to be solved is solved.
SUMMERY OF THE UTILITY MODEL
The object of the present invention is to provide a transmission mechanism with changeable transmission ratio to reduce the number of parts of the same series of products in order to overcome the drawbacks of the prior art.
The purpose of the utility model can be realized through the following technical scheme:
according to the utility model discloses an aspect provides a drive mechanism of removable drive ratio, including drive assembly, output, drive assembly connects between drive assembly and output, drive assembly is planetary gear box, is equipped with the planet wheel shaft hole of a plurality of different centre distances of multiunit on the third support that this planetary gear box and output are connected, and this planet wheel shaft hole is used for the planet wheel installation of different drive ratios.
As a preferred technical scheme, the driving assembly comprises a driving gear, a motor and a motor end cover fixed on the output end face of the motor, the driving gear is in transmission connection with the transmission assembly, and the motor end cover is fixedly connected with the transmission assembly.
According to a preferable technical scheme, the transmission assembly comprises a first-stage planetary gear transmission assembly, a second-stage planetary gear transmission assembly, a third-stage planetary gear transmission assembly and an inner gear ring, and the driving gear serves as an input sun gear of the first-stage planetary gear transmission assembly and is connected in a rotating mode to further drive the output member to rotate.
According to a preferable technical scheme, the first-stage planetary gear transmission assembly comprises a first support, first planetary gear shafts and first planetary gears, the first planetary gear shafts are arranged on the first support in a surrounding mode, and the first planetary gears, the number of which is the same as that of the first planetary gear shafts, are rotatably sleeved on the first planetary gear shafts and are meshed between the driving gear and the inner gear ring.
As a preferable technical scheme, the second-stage planetary gear transmission assembly comprises a second bracket, a second planetary gear shaft, a second planetary gear and a second sun gear; the second planet wheel shafts are arranged on the second support in a surrounding mode, the second sun wheel is coaxially and fixedly connected with the first support, and the second planet wheels, the number of which is the same as that of the second planet wheel shafts, are rotatably sleeved on the second planet wheel shafts and are meshed between the second sun wheel and the inner gear ring.
As a preferable technical scheme, the third-stage planetary gear transmission assembly comprises a third support, third planetary gear shafts, third planetary gears and a third sun gear, wherein a plurality of the third planetary gear shafts are arranged on the third support in a surrounding manner, the third sun gear is coaxially and fixedly connected with the second support, and the third planetary gears with the same number as the third planetary gear shafts are rotatably sleeved on the third planetary gear shafts and are meshed between the third sun gear and the inner gear ring.
As a preferred technical solution, the transmission assembly further comprises a first end cover and a second end cover; the first end cover comprises a first through hole, a first check ring and a second check ring for mounting and positioning the inner gear ring;
a pair of bearings is arranged on two sides of the first retainer ring, a shaft sleeve is arranged between the bearings, and the output piece is fixedly connected with the third support or integrally arranged in the bearings;
and the shell of the second end cover and the shell of the inner gear ring are fixed by welding.
As a preferred technical scheme, the second end cover is provided with a second through hole and a first boss for mounting and positioning the inner gear ring, and the driving gear extends into the second through hole to be in transmission connection with the transmission assembly.
As a preferred technical scheme, the annular gear comprises a gear part and a shell, and the shell is provided with a first blocking position used for limiting the first end cover and a second blocking position used for limiting the motor end cover.
As a preferred technical scheme, a second boss is arranged on one side, close to the output part, of the third support, and during assembly, the second boss is attached to the end face of the bearing in the through hole of the first end cover.
Compared with the prior art, the utility model discloses the output support that planetary gear case that drive mechanism adopted and output piece linked firmly is equipped with two at least three kinds of different centre-to-centre spacing through-holes, the through-hole be used for with planet wheel and axle looks adaptation to realize different transmission design demands.
Drawings
Fig. 1 is a schematic view of the whole structure of the middle transmission mechanism of the present invention.
Fig. 2 is a schematic structural view of a motor of a driving assembly of the middle transmission mechanism of the present invention.
Fig. 3 is a schematic structural diagram of the transmission assembly and the output assembly of the middle transmission mechanism of the present invention.
Fig. 4 is a schematic structural view of the first end cap of the present invention.
Fig. 5 is a schematic structural view of the second end cap of the present invention.
Fig. 6 is a schematic view of the structure of the middle ring gear of the present invention.
Fig. 7 is a schematic structural view of the output member of the present invention.
Wherein 10 is a driving component, 20 is a transmission component, and 30 is an output component; 11 is a driving gear, 12 is a motor, and 13 is a motor end cover;
21 is a first-stage planetary gear transmission component, 22 is a second-stage planetary gear transmission component, 23 is a third-stage planetary gear transmission component, 24 is an inner gear ring, 25 is a first end cover, 26 is a second end cover, 27 is a bearing, and 28 is a shaft sleeve;
211 is a first carrier, 212 is a first planet shaft, 213 is a first planet wheel, 221 is a second carrier, 222 is a second planet shaft, 223 is a second planet wheel, 224 is a second sun wheel, 231 is a third carrier, 2311, 2312 and 2313 are planet shaft holes, 2314 is a second boss, 232 is a third planet shaft, 233 is a third planet wheel and 234 is a third sun wheel;
241 is a gear portion, 242 is a housing, 2421 is a first blocking portion, 2422 is a second blocking portion, 251 is a first retainer ring, 252 is a second retainer ring, 261 is a first boss, and 262 is a second through hole.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, of the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall fall within the protection scope of the present invention.
The embodiment provides a transmission mechanism, especially provides a miniature planetary gear case and a miniature transmission mechanism of removable drive ratio, and the practicality is strong, can deal with complicated changeable application scenario.
In the embodiment of the present invention, the transmission mechanism includes a driving assembly 10, a transmission assembly 20, and an output member 30. The transmission assembly 20 is connected between the driving assembly 10 and the output member 30, so that the power of the driving member 10 is transmitted to the output member 30 through the transmission assembly 20 and then output.
Further, a driving gear 11 is disposed on the driving shaft of the driving assembly 10, and the driving member 10 is connected to the transmission assembly 20 through the driving gear 11. The transmission assembly 20 is a planetary gearbox comprising a first stage planetary gear transmission assembly 21, a second stage planetary gear transmission assembly 22 and a third stage planetary gear transmission assembly 23. The drive gear 11 is rotatably connected as an input sun gear of the first planetary gear set 21 and rotates the output member 30.
Specifically, referring to fig. 2, the driving assembly 10 includes a motor 12 and a motor end cover 13 fixed on an output end surface of the motor, and the motor end cover 13 is fixedly connected to the transmission assembly 20 to ensure stable power input of the driving assembly and improve transmission efficiency.
Specifically, referring to fig. 2 and 3, the first stage planetary gear assembly 21 includes a first bracket 211, a plurality of first planetary gear shafts 212 are surrounded on the first bracket 211, and a plurality of first planetary gears 213, which are the same in number as the first planetary gear shafts, are rotatably sleeved on the first planetary gear shafts 212 and are engaged between the driving gear 11 and the ring gear 24.
The second-stage planetary gear transmission assembly 22 comprises a second support 221, a plurality of second planetary gear shafts 222 are arranged on the second support 221 in a surrounding mode, a second sun gear 224 is coaxially and fixedly connected with the first support 211, and a plurality of second planetary gears 223, the number of which is the same as that of the second planetary gear shafts, are rotatably sleeved on the second planetary gear shafts 222 and are meshed between the second sun gear 224 and the inner gear ring 24.
The third-stage planetary gear transmission assembly 23 comprises a third support 231, a plurality of third planetary gear shafts 232 are arranged on the third support 231 in a surrounding mode, a third sun gear 234 coaxially and fixedly connected with the second support 221, and a plurality of third planetary gears 233 which are the same in number as the planetary gear shafts are rotatably sleeved on the third planetary gear shafts 232 and meshed between the third sun gear 234 and the inner gear ring 24. The driving gear 11 drives the third carrier 231 to rotate coaxially through a plurality of sets of planetary gear transmission connections.
Specifically, referring to fig. 2 to 5, the transmission assembly 20 further includes a first end cover 25 and a second end cover 26, the first end cover is provided with a first through hole and a first retaining ring 251, a pair of bearings 27 are provided at two sides of the first retaining ring 251, a shaft sleeve 28 is provided between the bearings, and the output member 30 is fixedly connected to the third bracket 231 or integrally installed in an inner ring of the bearing 27, so as to axially and radially position the output member 30. The first end cover 25 is provided with a second retaining ring 252, the second retaining ring 252 is used for being installed and positioned with the inner gear ring, the shell of the first end cover 25 is fixed with the shell of the inner gear ring 24 through laser welding, and the other end face, opposite to the inner gear ring 24, of the first end cover 25 is provided with a plurality of threaded holes in a surrounding mode and used for being connected with the fixed portion of the output mechanism, and therefore transmission stability is improved.
Specifically, referring to fig. 2 to 5, the transmission assembly 20 further includes a first end cover 25 and a second end cover 26, the second end cover 26 is provided with a first boss 261 for positioning in installation with an annular gear to axially limit the first-stage planetary transmission assembly 21, the second end cover 26 is provided with a second through hole 262, and the driving gear 11 extends into the transmission assembly 20 through the second through hole 262 to be in transmission connection with the transmission assembly 20.
Specifically, referring to fig. 2 to 6, the transmission assembly 20 further includes a ring gear 24 engaged with the first-stage planetary gear transmission assembly 21, the second-stage planetary gear transmission assembly 22, and the third-stage planetary gear transmission assembly 23, the ring gear 24 includes a gear portion 241 and a housing 242, the housing 242 is provided with a first blocking position 2421 for limiting the first end cover 25, the housing 242 is provided with a second blocking position 2422 for limiting the motor end cover 13, the first blocking position 2421 is fixedly connected with the first end cover 25, and the second blocking position 2422 is fixedly connected with the motor end cover 13, which may be laser welded.
Specifically, referring to fig. 7, a plurality of planetary axle holes 2311, 2312 and 2313 with different center distances and the same aperture size are uniformly distributed on the third support 231. The transmission ratio of the transmission mechanism 20 can be selected according to the requirement of the use condition, and then the third planet wheel shaft 232 is installed in the corresponding planet wheel shaft hole, and it should be noted that the correspondingly matched third sun gear 234 needs to be replaced by a sun gear with the corresponding tooth number and the corresponding shift coefficient.
Specifically, referring to fig. 7, a second boss 2314 is disposed on one side of the third bracket 231 close to the output member 30, and during assembly, the second boss 2314 is attached to the bearing end face in the through hole of the first end cover 25, so that transmission friction is reduced, and transmission efficiency is improved.
Specifically, referring to fig. 1 to 7, a micro transmission mechanism specifically adopts a transmission mode: the driving shaft of the driving component 10 rotates to drive the driving gear 11 to rotate coaxially, the driving gear 11 is meshed with the planet gear 213 of the first-stage planetary gear transmission component 21, the planet gear 213 rotates on the planet gear shaft 212 and is meshed with the inner gear ring 24 at the same time, and the first support 211 is driven to rotate; the first support 211 drives a second sun gear 224 which is coaxially and fixedly connected to rotate, the second sun gear 224 is meshed with a planet gear 223 of the second-stage planetary gear transmission assembly 22 to rotate, and the planet gear 223 rotates on a planet gear shaft 222 and is meshed with an inner gear ring 24 at the same time and drives a second support 221 to rotate; the second bracket 221 drives a third sun gear 234 which is coaxially and fixedly connected to rotate, the third sun gear 234 is meshed with a third planet gear 233 of the third-stage planetary gear transmission assembly 23 to rotate, and the third planet gear 233 rotates on a third planet gear shaft 232 and is meshed with the inner gear ring 24 at the same time and drives a third bracket 231 to rotate; the output member 30 rotates coaxially with the third holder 231 to output power.
Specifically, referring to fig. 1 to 7, a micro-transmission mechanism, according to actual conditions, a driving gear 11 can be directly meshed with a planetary gear 223 of a second-stage planetary gear transmission assembly 22 or directly meshed with a third planetary gear 233 of a third-stage planetary gear transmission assembly 23.
The utility model discloses drive assembly is equipped with the different centre-to-centre spacing through-holes of three at least groups including the planetary gear case and the end cover that can change drive ratio on the output support that gear box and output piece linked firmly, the through-hole be used for with axle and planet wheel looks adaptation to realize different transmission speed ratio demands. The motor is fixedly connected with the inner gear ring of the planetary gear box through the fixed end cover, the mechanism compactness of the transmission mechanism is effectively improved, the volume of the transmission mechanism and the number of parts of products in the same series are reduced, and the planetary gear box can change the design of the transmission ratio so that the transmission mechanism is suitable for different working scenes.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope of the present invention, and these modifications or replacements should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A transmission mechanism with a replaceable transmission ratio comprises a driving assembly (10), a transmission assembly (20) and an output member (30), wherein the transmission assembly (20) is connected between the driving assembly (10) and the output member (30), the transmission assembly (20) is a planetary gear box, a third support (231) of the planetary gear box connected with the output member (30) is provided with a plurality of groups of planetary wheel shaft holes (2311, 2312 and 2313) with different center distances, and the planetary wheel shaft holes (2311, 2312 and 2313) are used for installing planetary wheels with different transmission ratios.
2. A transmission mechanism with a changeable transmission ratio as claimed in claim 1, wherein the driving assembly (10) comprises a driving gear (11), a motor (12) and a motor end cover (13) fixed on the output end face of the motor, the driving gear (11) is in transmission connection with the transmission assembly (20), and the motor end cover (13) is fixedly connected with the transmission assembly (20).
3. A transmission ratio-changeable transmission according to claim 2, wherein the transmission assembly (20) comprises a first stage planetary gear transmission assembly (21), a second stage planetary gear transmission assembly (22), a third stage planetary gear transmission assembly (23) and an annulus gear (24), and the driving gear (11) is used as an input sun gear of the first stage planetary gear transmission assembly (21) for rotary connection to drive the output member (30) to rotate.
4. A transmission mechanism with changeable transmission ratio according to claim 3, characterized in that the first-stage planetary gear transmission assembly (21) comprises a first support (211), a first planetary gear shaft (212) and a first planetary gear (213), a plurality of the first planetary gear shafts (212) are arranged on the first support (211), and the first planetary gear (213) with the same number as the first planetary gear shafts (212) is rotatably arranged on the first planetary gear shaft (212) and is engaged between the driving gear (11) and the inner gear ring (24).
5. A transmission ratio-changeable transmission according to claim 4, wherein the second stage planetary gear transmission assembly (22) comprises a second carrier (221), a second planetary gear shaft (222), second planetary gears (223) and a second sun gear (224); the plurality of second planet wheel shafts (222) are arranged on the second support (221) in a surrounding mode, the second sun wheel (224) is coaxially and fixedly connected with the first support (211), and the second planet wheels (223) with the same number as the second planet wheel shafts (222) are rotatably sleeved on the second planet wheel shafts (222) and are meshed between the second sun wheel (224) and the inner gear ring (24).
6. A transmission mechanism with changeable transmission ratio as claimed in claim 5, characterized in that the third stage planetary gear transmission assembly (23) comprises a third support (231), a third planetary gear shaft (232), a third planetary gear (233) and a third sun gear (234), a plurality of the third planetary gear shafts (232) are enclosed on the third support (231), the third sun gear (234) is coaxially and fixedly connected with the second support (221), and a same number of third planetary gears (233) as the third planetary gear shafts (232) are rotatably sleeved on the third planetary gear shafts (232) and engaged between the third sun gear (234) and the inner gear ring (24).
7. A transmission ratio-changeable transmission mechanism according to claim 6, wherein the transmission assembly (20) further comprises a first end cap (25) and a second end cap (26); the first end cover (25) comprises a first through hole, a first retainer ring (251) and a second retainer ring (252) for installing and positioning the inner gear ring (24);
a pair of bearings (27) are arranged on two sides of the first retainer ring (251), a shaft sleeve (28) is arranged between the bearings, and the output part (30) is fixedly connected with the third support (231) or integrally installed in the bearings (27);
the shell of the second end cover (26) and the shell of the inner gear ring (24) are fixed through welding.
8. A transmission mechanism with changeable transmission ratio as claimed in claim 7, characterized in that the second end cap (26) is provided with a second through hole (262) and a first boss (261) for mounting and positioning the inner gear ring (24), and the driving gear (11) is extended into transmission connection with the transmission component (20) through the second through hole (262).
9. A transmission ratio change transmission mechanism as claimed in claim 7, characterized in that the ring gear (24) comprises a gear part (241) and a housing (242), the housing (242) being provided with a first blocking position (2421) for limiting the first end cap (25) and a second blocking position (2422) for limiting the motor end cap (13).
10. A transmission ratio-changing transmission mechanism according to claim 7, characterised in that the third carrier (231) is provided with a second boss (2314) on the side adjacent to the output member (30), said second boss (2314) engaging with the bearing surface in the through-hole of the first end cap (25) when assembled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222719834.0U CN218882951U (en) | 2022-10-17 | 2022-10-17 | Transmission mechanism with replaceable transmission ratio |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222719834.0U CN218882951U (en) | 2022-10-17 | 2022-10-17 | Transmission mechanism with replaceable transmission ratio |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218882951U true CN218882951U (en) | 2023-04-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222719834.0U Active CN218882951U (en) | 2022-10-17 | 2022-10-17 | Transmission mechanism with replaceable transmission ratio |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218882951U (en) |
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2022
- 2022-10-17 CN CN202222719834.0U patent/CN218882951U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20231213 Address after: 201107 room 337, building 2, 168 Mingjia Road, Minhang District, Shanghai Patentee after: SHANGHAI MINGZHI PAIBOSI AUTOMATION TECHNOLOGY CO.,LTD. Address before: No.168 Mingjia Road, Minbei Industrial Zone, Minhang District, Shanghai 201107 Patentee before: SHANGHAI MOONS' ELECTRIC Co.,Ltd. |
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| TR01 | Transfer of patent right |