CN212985936U - Connecting structure of planetary reducer - Google Patents
Connecting structure of planetary reducer Download PDFInfo
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- CN212985936U CN212985936U CN202021558966.4U CN202021558966U CN212985936U CN 212985936 U CN212985936 U CN 212985936U CN 202021558966 U CN202021558966 U CN 202021558966U CN 212985936 U CN212985936 U CN 212985936U
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Abstract
A connecting structure of a planetary reducer comprises a planetary wheel and a planet carrier, wherein the planetary wheel is connected with the planet carrier through a pin shaft; the front section shaft lever of the pin shaft is provided with two sections parallel to the axis, and the two sections are parallel to each other; the rear section shaft rod is provided with a complete outer circumference; the rear section shaft lever is in interference fit with the mounting hole on the planet carrier; the front-section shaft lever is inserted in the shaft hole of the planet gear, the cambered surface of the front-section shaft lever and the inner wall of the shaft hole of the planet gear form clearance fit, and a space is reserved between the cross section and the inner wall of the shaft hole of the planet gear; the space is filled with grease for lubrication. Due to the structural design of the front-section shaft lever of the pin shaft, the contact area between the pin shaft and the inner wall of the planetary wheel shaft hole can be reduced, so that friction and heat are reduced, and the transmission efficiency is improved. Meanwhile, lubricating grease can be stored in the space reserved by the pin shaft when the pin shaft is matched with the shaft hole of the planet wheel, so that the probability of abrasion or gluing of the planet wheel and the pin shaft due to insufficient lubrication during the running of the speed reducer is reduced, and the purpose of eliminating abnormal sound is achieved.
Description
Technical Field
The utility model belongs to the technical field of planetary reducer, a planetary reducer's connection structure is related to.
Background
The planetary reducer has the advantages of small volume, large bearing capacity, stable work and the like, and is widely applied to the industries of medical instruments, aerospace, automobiles, electronic instruments and the like. The planet wheels in the planetary gear set are usually connected with the planet carrier by rolling bearings. However, for a small module planetary reducer with a smaller outer diameter, due to the limitation of a volume structure, a rolling bearing is not arranged in a space between the planetary wheel and the pin shaft of the planetary carrier, but is connected through the pin shaft. That is to say, the pin shaft on the planet carrier is directly inserted in the shaft hole of the planet wheel, and the two run in an empty sleeve mode. The problem that this kind of connection structure exists lies in, planetary gear and round pin axle carry out dry friction when planetary reducer operates, and under the higher condition of rotational speed, the phenomenon serious, the cooperation department wearing and tearing or the veneer of generating heat easily appears in the planet wheel and round pin axle fitting surface, can influence planetary reducer's life and transmission efficiency, and the abnormal sound appears easily.
Disclosure of Invention
In view of this, the utility model provides a planetary reducer's connection structure, the effectual friction that reduces between planet wheel and the round pin axle, and then improve transmission efficiency, avoid appearing the abnormal sound.
The utility model adopts the technical proposal that: a connecting structure of a planetary reducer comprises a planetary wheel and a planet carrier, wherein the planetary wheel is connected with the planet carrier through a pin shaft; the method is characterized in that: the pin shaft is a cylinder and comprises a front section shaft lever and a rear section shaft lever; the front section shaft lever is provided with two sections parallel to the axis, and the two sections are parallel to each other; the rear section shaft rod is provided with a complete outer circumference; the rear section shaft lever is in interference fit with the mounting hole in the planet carrier; the front-section shaft lever is inserted into the shaft hole of the planet gear, the cambered surface of the front-section shaft lever is in clearance fit with the inner wall of the shaft hole of the planet gear, and a space is reserved between two sections of the front-section shaft lever and the inner wall of the shaft hole of the planet gear; and grease for lubrication is filled in the space between the cross section and the inner wall of the shaft hole.
Furthermore, central angles corresponding to the two sections on the pin shaft account for 1/4-1/3 of the central angle of the whole cylinder.
Further, the length of the front-section shaft lever is consistent with that of a shaft hole of the planet wheel; the length of the rear section shaft is consistent with that of the mounting hole of the planet carrier.
The utility model has the advantages that: due to the structural design of the front section shaft lever of the pin shaft, the contact area between the pin shaft and the inner wall of the planetary wheel shaft hole can be reduced when the planetary reducer operates, so that friction and heat are reduced, and the transmission efficiency is improved. Meanwhile, lubricating grease can be stored in the space reserved by the pin shaft when the pin shaft is matched with the shaft hole of the planet wheel, so that the probability of abrasion or gluing of the planet wheel and the pin shaft due to insufficient lubrication during the running of the speed reducer is reduced, and the purpose of eliminating abnormal sound is achieved.
Drawings
Fig. 1 is a sectional view of the present invention.
Fig. 2 is a schematic front view of the present invention.
Fig. 3 is a schematic structural diagram of the middle pin shaft of the present invention.
Fig. 4 is a right side view of fig. 3.
In the figure: 1. planet wheel, 2, pin shaft, 2-1, anterior segment axostylus axostyle, 2-2, cross-section, 2-3, back end axostylus axostyle, 3, planet carrier.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.
The utility model discloses mainly be to the improvement that connection structure between the planet subassembly made in the planetary reducer. The planetary assembly specifically refers to a connection structure between the planet carrier 3 and the planet wheel 1.
As shown in fig. 1 and 2, a connection structure of a planetary reduction gear includes a planet carrier 3 and a planet gear 1. The planet carrier 3 is connected with the planet wheel 1 through a pin shaft 2. The pin shaft 2 is a cylinder, and the pin shaft 2 is provided with a double-flat structure. The double-flat structure is shown in fig. 3 and 4, the front section shaft lever 2-1 of the pin shaft 2 is provided with two sections 2-2 parallel to the axis, and the two sections 2-2 are parallel to each other. The rear section shaft 2-3 of the pin shaft 2 has a complete outer circumference. As shown in fig. 1 and 2, the rear shaft 2-3 of the pin 2 is in interference fit with the mounting hole of the planet carrier 3. The front section shaft lever 2-1 of the pin shaft 2 is inserted in the shaft hole of the planet wheel 1, the cambered surface of the section shaft lever forms clearance fit with the inner wall of the shaft hole of the planet wheel 1, and a space is reserved between the two sections 2-2 of the section shaft lever and the inner wall of the shaft hole of the planet wheel 1. Grease for lubrication is filled between the section 2-2 and the inner wall of the shaft hole. The pin 2, which is formed with a shoulder with a cross-section 2-2, abuts against the side of the planet wheel 1 during mounting.
The central angles corresponding to the two sections 2-2 on the pin shaft 2 account for 1/4-1/3 of the central angle of the whole cylinder.
The length of the front section shaft lever 2-1 of the pin shaft 2 is consistent with that of the shaft hole of the planet wheel 1. The length of the rear section shaft rod 2-3 of the pin shaft 2 is consistent with that of the mounting hole of the planet carrier 3.
Due to the design of the double-flat structure of the pin shaft 2, when the planetary reducer operates, the contact area between the pin shaft 2 and the inner wall of the shaft hole of the planetary gear 1 can be reduced, so that friction and heat are reduced, and the transmission efficiency is improved. Meanwhile, lubricating grease can be stored in the space reserved between the pin shaft 2 and the shaft hole of the planet wheel 1 when the pin shaft is matched with the shaft hole of the planet wheel, so that the probability of abrasion or gluing of the planet wheel 1 and the pin shaft 2 caused by insufficient lubrication during the running of the speed reducer is reduced, and abnormal sound is eliminated.
Claims (3)
1. A connecting structure of a planetary reducer comprises a planetary wheel and a planet carrier, wherein the planetary wheel is connected with the planet carrier through a pin shaft; the method is characterized in that: the pin shaft is a cylinder and comprises a front section shaft lever and a rear section shaft lever; the front section shaft lever is provided with two sections parallel to the axis, and the two sections are parallel to each other; the rear section shaft rod is provided with a complete outer circumference; the rear section shaft lever is in interference fit with the mounting hole in the planet carrier; the front-section shaft lever is inserted into the shaft hole of the planet gear, the cambered surface of the front-section shaft lever is in clearance fit with the inner wall of the shaft hole of the planet gear, and a space is reserved between two sections of the front-section shaft lever and the inner wall of the shaft hole of the planet gear; and grease for lubrication is filled in the space between the cross section and the inner wall of the shaft hole.
2. A connection structure of a planetary speed reducer according to claim 1, wherein: the central angles corresponding to the two sections on the pin shaft account for 1/4-1/3 of the central angle of the whole cylinder.
3. A connection structure of a planetary speed reducer according to claim 1, wherein: the length of the front-section shaft lever is consistent with that of the shaft hole of the planet wheel; the length of the rear section shaft is consistent with that of the mounting hole of the planet carrier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021558966.4U CN212985936U (en) | 2020-07-31 | 2020-07-31 | Connecting structure of planetary reducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021558966.4U CN212985936U (en) | 2020-07-31 | 2020-07-31 | Connecting structure of planetary reducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212985936U true CN212985936U (en) | 2021-04-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021558966.4U Active CN212985936U (en) | 2020-07-31 | 2020-07-31 | Connecting structure of planetary reducer |
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| CN (1) | CN212985936U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113404844A (en) * | 2021-06-02 | 2021-09-17 | 浙江零跑科技股份有限公司 | Gluing structure is prevented to planetary gear's hole |
-
2020
- 2020-07-31 CN CN202021558966.4U patent/CN212985936U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113404844A (en) * | 2021-06-02 | 2021-09-17 | 浙江零跑科技股份有限公司 | Gluing structure is prevented to planetary gear's hole |
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