CN216519222U - Needle bearing retainer for planetary reducer - Google Patents
Needle bearing retainer for planetary reducer Download PDFInfo
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- CN216519222U CN216519222U CN202123367278.7U CN202123367278U CN216519222U CN 216519222 U CN216519222 U CN 216519222U CN 202123367278 U CN202123367278 U CN 202123367278U CN 216519222 U CN216519222 U CN 216519222U
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- ring body
- needle
- lower ring
- upper ring
- planetary reducer
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Abstract
The utility model relates to a needle bearing retainer for a planetary reducer, which comprises a retainer body, wherein the retainer body comprises an integrally formed upper ring body, a lower ring body and locking needles which are arranged between the upper ring body and the lower ring body in parallel, a needle groove is formed between every two adjacent locking needles, rectangular bosses which extend into the needle groove are respectively arranged at two ends of each locking needle, which are close to the upper ring body and the lower ring body, a first groove is formed between each rectangular boss and the upper ring body or the lower ring body, and a second groove is formed between the two rectangular bosses at the same side. The needle bearing retainer of the planetary reducer is designed into an outer lock needle or inner lock needle structure, and compared with an original M-shaped retainer, the needle bearing retainer is simpler in structure, lower in processing difficulty, higher in qualification rate and greatly improved in strength.
Description
The technical field is as follows:
the utility model relates to the technical field of bearings, in particular to a needle bearing retainer of a planetary speed reducer used on a robot joint.
Background art:
because the stress and the rotating speed of the needle roller bearing used in the robot joint planetary reducer are high, multipoint needle rollers are adopted to meet the design requirements as much as possible when the needle roller bearing is designed, an M-shaped retainer is adopted in the original design, as shown in figure 1, the number of the needle rollers of the retainer is 13, and the dynamic load is 83.8KN and the static load is 99.9 KN. However, the full-filling needle roller has the limitation of rotating speed, so that the limit rotating speed cannot be met under the normal condition, and the full-filling needle roller bearing is difficult to assemble.
The utility model has the following contents:
aiming at the defects in the prior art, the utility model provides the needle bearing retainer of the planetary speed reducer, which has the advantages of simple structure and low processing difficulty and can greatly improve the dynamic load and the static load of a bearing.
The utility model is realized by the following technical scheme:
the utility model provides a needle bearing retainer for a planetary reducer, which comprises a retainer body, wherein the retainer body comprises an upper ring body, a lower ring body and locking needles which are arranged between the upper ring body and the lower ring body in parallel, a needle groove is formed between every two adjacent locking needles, rectangular bosses which extend into the needle groove are respectively arranged at two ends of each locking needle, which are close to the upper ring body and the lower ring body, a first groove is formed between each rectangular boss and the upper ring body or the lower ring body, and a second groove is formed between the two rectangular bosses at the same side.
In a preferred embodiment of the present invention, the upper ring body, the lower ring body and the lock pin are an external lock pin structure for preventing the needle pins from being removed outwards.
Specifically, the outer end surfaces of the upper ring body and the lower ring body are flush with the outer end surface of the lock needle, the inner end surfaces of the upper ring body and the lower ring body extend inwards and exceed the inner end surface of the lock needle, and the needle roller is installed on the inner side of the lock needle.
Preferably, the number of the locking pins is 18.
In another preferred embodiment of the present invention, the upper ring body, the lower ring body and the locking pin are an inner locking pin structure for preventing the rolling pin from being removed inward.
Specifically, the inner end surfaces of the upper ring body and the lower ring body are flush with the inner end surface of the lock pin, the outer end surfaces of the upper ring body and the lower ring body extend outwards and exceed the outer end surface of the lock pin, and the needle roller is installed on the outer side of the lock pin.
Preferably, the number of the locking pins is 15.
The utility model has the beneficial effects that: the needle bearing retainer of the planetary reducer is designed into an outer lock needle or inner lock needle structure, and compared with an original M-shaped retainer, the needle bearing retainer is simpler in structure, lower in processing difficulty, higher in qualification rate and greatly improved in strength.
Description of the drawings:
fig. 1 is a schematic perspective view of an M-shaped cage of a needle bearing in a planetary reducer in the prior art;
FIG. 2 is a schematic perspective view of embodiment 1 of the present invention;
FIG. 3 is a schematic perspective view of the needle roller of embodiment 1 of the present invention;
FIG. 4 is a schematic perspective view of embodiment 2 of the present invention;
fig. 5 is a schematic perspective view of embodiment 2 of the present invention after the needle roller is installed.
The specific implementation mode is as follows:
the following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the utility model more readily understood by those skilled in the art, and thus will more clearly and distinctly define the scope of the utility model. The directional terms used in the present invention, such as "up", "down", "front", "back", "left", "right", "top", "bottom", etc., refer to the directions of the attached drawings. Accordingly, the directional terms used are used for explanation and understanding of the present invention, and are not used for limiting the present invention.
Example 1:
as shown in fig. 2, the needle bearing retainer for the planetary reducer comprises a retainer body, the retainer body comprises an upper ring body 1, a lower ring body 2 and a plurality of locking needles 3 arranged between the upper ring body 1 and the lower ring body 2 in parallel, the number of the locking needles 3 is 18, 18 needle needles can be installed, a needle groove is formed between two adjacent locking needles 3, a cylindrical needle can be installed, rectangular bosses 31 extending into the needle groove are respectively arranged at two ends of the locking needles 3 close to the upper ring body 1 and the lower ring body 2, a first groove 32 is formed between the rectangular bosses 31 and the upper ring body 1 or the lower ring body 2, and a second groove 33 is formed between the two rectangular bosses 31 at the same side.
In this embodiment, the upper ring body 1, the lower ring body 2 and the locking pin 3 are an external locking pin structure for preventing the rolling pins from being pulled out. Referring to fig. 3, the outer end surfaces of the upper ring body and the lower ring body are flush with the outer end surface of the lock pin, the inner end surfaces of the upper ring body and the lower ring body extend inwards and exceed the inner end surface of the lock pin, the needle roller 4 is installed on the inner side of the lock pin, the inner end surface of the needle roller 4 exceeds the inner end surfaces of the upper ring body and the lower ring body, the outer end surface of the needle roller 4 does not exceed the outer end surfaces of the upper ring body and the lower ring body, and the needle roller 4 can move inwards but cannot move outwards.
Compared with the original M-shaped retainer, the retainer in the embodiment has the advantages that the finite element analysis strength is increased, the dynamic load is 106.9KN, the static load is 138KN, the dynamic load is increased by 27.5%, and the static load is increased by 38%.
Example 2:
the difference from the embodiment 1 is that: as shown in fig. 4, the upper ring body 1 ', the lower ring body 2 ' and the locking pin 3 ' are an inner locking pin structure for preventing the needle roller from being removed inward. Referring to fig. 5, the inner end surfaces of the upper ring body 1 'and the lower ring body 2' are flush with the inner end surface of the latch needle 3 ', the outer end surfaces of the upper ring body 1' and the lower ring body 2 'extend outward and exceed the outer end surface of the latch needle 3', the needle rollers 4 'are installed outside the latch needle 3', the number of the latch needles 3 'is 15, and 15 cylindrical needle rollers 4' can be installed.
Compared with the original M-shaped retainer, the retainer in the embodiment has the advantages that the finite element analysis strength is increased, the dynamic load is 93.2KN, the static load is 115KN, the dynamic load is increased by 11.2%, and the static load is increased by 15%.
It is to be noted that the irrelevant parts of the utility model are the same as or can be implemented by the prior art.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (7)
1. The utility model provides a needle bearing holder for planetary reducer, includes the holder body, the holder body includes integrated into one piece's last ring body, lower ring body and parallel arrangement lock needle between last ring body and lower ring body, forms the needle groove between two adjacent lock needles, its characterized in that: the two ends of the lock pin, which are close to the upper ring body and the lower ring body, are respectively provided with a rectangular boss extending towards the needle rolling groove, a first groove is formed between the rectangular boss and the upper ring body or the lower ring body, and a second groove is formed between the two rectangular bosses on the same side.
2. The needle bearing holder for a planetary reducer as set forth in claim 1, wherein: the upper ring body, the lower ring body and the lock pin are of an external lock pin structure for preventing the rolling needles from being separated outwards.
3. The needle roller bearing holder for a planetary reducer as set forth in claim 2, wherein: the outer end faces of the upper ring body and the lower ring body are flush with the outer end face of the lock needle, the inner end faces of the upper ring body and the lower ring body extend inwards and exceed the inner end face of the lock needle, and the needle roller is installed on the inner side of the lock needle.
4. The needle roller bearing holder for a planetary reducer as set forth in claim 3, wherein: the number of the locking pins is 18.
5. The needle bearing holder for a planetary reducer as set forth in claim 1, wherein: the upper ring body, the lower ring body and the lock pin are of an inner lock pin structure for preventing the rolling needles from being separated inwards.
6. The needle roller bearing holder for a planetary reducer as set forth in claim 5, wherein: the inner end surfaces of the upper ring body and the lower ring body are flush with the inner end surface of the lock pin, the outer end surfaces of the upper ring body and the lower ring body extend outwards and exceed the outer end surface of the lock pin, and the needle roller is installed on the outer side of the lock pin.
7. The needle roller bearing holder for a planetary reducer as set forth in claim 6, wherein: the number of the locking pins is 15.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123367278.7U CN216519222U (en) | 2021-12-29 | 2021-12-29 | Needle bearing retainer for planetary reducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123367278.7U CN216519222U (en) | 2021-12-29 | 2021-12-29 | Needle bearing retainer for planetary reducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216519222U true CN216519222U (en) | 2022-05-13 |
Family
ID=81507106
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123367278.7U Active CN216519222U (en) | 2021-12-29 | 2021-12-29 | Needle bearing retainer for planetary reducer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216519222U (en) |
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2021
- 2021-12-29 CN CN202123367278.7U patent/CN216519222U/en active Active
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