CN110566575A - ultra-light roller crossed bearing - Google Patents
ultra-light roller crossed bearing Download PDFInfo
- Publication number
- CN110566575A CN110566575A CN201910947905.2A CN201910947905A CN110566575A CN 110566575 A CN110566575 A CN 110566575A CN 201910947905 A CN201910947905 A CN 201910947905A CN 110566575 A CN110566575 A CN 110566575A
- Authority
- CN
- China
- Prior art keywords
- bearing
- ring
- roller
- inner ring
- outer ring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
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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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
- F16C19/34—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load
- F16C19/36—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with a single row of rollers
- F16C19/361—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with a single row of rollers with cylindrical rollers
- F16C19/362—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with a single row of rollers with cylindrical rollers the rollers being crossed within the single row
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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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/58—Raceways; Race rings
- F16C33/581—Raceways; Race rings integral with other parts, e.g. with housings or machine elements such as shafts or gear wheels
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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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/58—Raceways; Race rings
- F16C33/583—Details of specific parts of races
-
- 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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
- F16C33/7803—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings
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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
- F16H49/00—Other gearings
- F16H49/001—Wave gearings, e.g. harmonic drive transmissions
-
- 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
- F16H2057/02086—Measures for reducing size of gearbox, e.g. for creating a more compact transmission casing
-
- 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
- F16H2057/02091—Measures for reducing weight of gearbox
Abstract
The invention discloses an ultra-light roller crossed bearing, which comprises a bearing inner ring 32, wherein only one bearing outer ring 31 is arranged outside the bearing inner ring 32; a roller cross cylinder 43 is arranged between the bearing inner ring 32 and the bearing outer ring 31; a first bolt hole 33 corresponding to the flexible gear 5 is formed on the bearing outer ring 31; a second bolt hole 34 connected with the output flange 42 is formed on the bearing inner ring 32; the roller cross bearing is a negative clearance; and a framework oil seal 35 is arranged between the bearing outer ring 31 and the bearing inner ring 32. The invention reduces the occupied space of the crossed roller bearing by more than 10%, and fixes the framework oil seal through the bearing cover, thereby ensuring the sealing performance without enlarging the volume of the crossed roller shaft; the width dimension of the outermost side is changed from 18mm to 9.4mm, while the radius dimension of the roller path is unchanged, so that the weight and the volume of the roller path are greatly reduced.
Description
The technical field is as follows:
The invention relates to the technical field of harmonic reducers, in particular to an ultra-light harmonic reducer.
background art:
The harmonic reducer is a gear drive which utilizes the wave generator to make the flexible gear generate controllable elastic deformation and is meshed with the rigid gear to transfer motion and power. The harmonic reducer has the unique advantages of high bearing capacity, large transmission ratio, small volume, stable transmission, high transmission precision and the like, and is widely applied to the industries of electronics, aerospace, aviation, robots and the like based on the advantages.
However, the existing harmonic reducer is too heavy and the flexspline is too loaded, so the company invented a harmonic reducer with lighter weight, in which a cross roller bearing is used, but the existing cross roller bearing is usually provided with two outer rings, and the volume and the weight of the existing cross roller bearing are both larger.
The invention content is as follows:
The invention aims to provide an ultra-light harmonic reducer, which reduces the occupied space of a crossed roller bearing by more than 10%, and a framework oil seal is fixed through a bearing cover, so that the sealing performance is ensured, and the volume of a crossed roller shaft is not basically enlarged; the width dimension of the outermost side is changed from 18mm to 9.4mm, while the radius dimension of the roller path is unchanged, so that the weight and the volume of the roller path are greatly reduced.
in order to solve the problems, the technical scheme of the invention is as follows:
An ultra-light roller cross bearing comprises a bearing inner ring 32, wherein only one bearing outer ring 31 is arranged outside the bearing inner ring 32; a roller cross cylinder 43 is arranged between the bearing inner ring 32 and the bearing outer ring 31; a first bolt hole 33 corresponding to the flexible gear 5 is formed on the bearing outer ring 31; a second bolt hole 34 connected with the output flange 42 is formed on the bearing inner ring 32; the roller cross bearing is a negative clearance; and a framework oil seal 35 is arranged between the bearing outer ring 31 and the bearing inner ring 32.
In a further improvement, the framework oil seal 35 is fixed by a bearing cover 36.
in a further improvement, the width of the bearing inner ring 32 is larger than that of the bearing outer ring 31.
In a further improvement, the width of the bearing inner ring 32 is 16.5 +/-0.5 mm, and the width of the bearing outer ring 31 is 9.4 mm.
in a further improvement, the bearing inner race 32 is wider than the bearing outer race 31 and is formed with V-shaped grooves that mate with the roller cross cylinders 43.
The invention has the advantages that:
The invention reduces the occupied space of the crossed roller bearing by more than 10%, and fixes the framework oil seal through the bearing cover, thereby ensuring the sealing performance without enlarging the volume of the crossed roller shaft; the width dimension of the outermost side is changed from 18mm to 9.4mm, while the radius dimension of the roller path is unchanged, so that the weight and the volume of the roller path are greatly reduced.
Description of the drawings:
FIG. 1 is a schematic diagram of the overall structure of an ultra-lightweight harmonic reducer;
Fig. 2 is a schematic view of the overall structure of the roller cross bearing.
The specific implementation mode is as follows:
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Example 1
As shown in fig. 1, the ultra-light harmonic reducer comprises a hollow shaft 1, wherein an oval part 11 is formed in the middle of the hollow shaft 1, and an inner ring of a flexible rolling bearing 6 is sleeved outside the oval part 11; a flexible gear 5 is sleeved on the outer ring of the flexible rolling bearing 6; the flexspline 5 includes an outer ring tooth portion 51 and an L-shaped cylindrical wall portion 52; the outer ring tooth part 51 is externally engaged with the inner ring teeth 41 of the rigid wheel 4; the bearing outer ring 31 of the roller cross bearing 3 is connected to the L-shaped cylinder wall portion 52; the rigid wheel 4 is connected with a bearing inner ring 32 of the roller cross bearing 3; the rigid wheel 4 is connected with an output flange 42; the flexible gear 5 is connected with a mounting flange 2; support bearings 8 are mounted between the flexspline 5 and the output flange 42 and the hollow shaft 1. The rigid wheel 4 is integrally formed with the output flange 42.
The mounting flange 2, the output flange 42 and the rigid wheel 4 are all made of aluminum alloy; the mounting flange 2 and the part of the output flange 42 contacting with the support bearing 8 and the inner ring teeth 41 are both made of the embedding material 9; the inlay material 9 is made of die-cast alloy structural steel.
The die-casting alloy structural steel is respectively embedded on the mounting flange 2, the output flange 42 and the rigid wheel 4.
a roller cross cylinder 43 is arranged between the bearing outer ring 31 and the bearing inner ring 32; a first bolt hole 33 corresponding to the flexible gear 5 is formed on the bearing outer ring 31; the bearing inner race 32 is formed with second bolt holes 34 that connect to the output flange 42.
the roller cross bearing 3 is a negative clearance; a framework oil seal 35 is installed between the bearing outer ring 31 and the bearing inner ring 32, and the framework oil seal 35 is fixed through a bearing cover 36.
The number of the first bolt holes 33 is 12, and the number of the second bolt holes 34 is 8; the first bolt holes 33 and the second bolt holes 34 are respectively uniformly arranged along the roller cross bearing 3.
an O-shaped ring 10 is arranged between the bearing inner ring 32 and the mounting flange 2.
According to the invention, power is input through the hollow shaft 1, the mounting flange 2 is fixed, so that the elliptical part 11 replaces a harmonic generator, the flexible gear deforms, the rigid gear 4 serves as an output, the flexible gear only bears deformation coincidence, and the output coincidence is borne by the rigid gear, so that the load of the flexible gear is reduced, and the service life of the harmonic reducer is prolonged. In addition, the hollow shaft 1 is arranged in a hollow mode, so that the weight of the whole device is reduced.
On the basis of a specific structure, the invention changes the material, uses aluminum alloy material, and inlays (casts) alloy structural steel at a key rotating part, thereby ensuring the due hardness requirement and the service performance of the part and meeting the service conditions. The weight is effectively reduced, the cost is reduced, and meanwhile, the installation is also convenient.
The occupied space of the crossed roller bearing is reduced by more than 10%, and the framework oil seal is fixed through the bearing cover, so that the sealing performance of the crossed roller bearing is ensured, and the volume of the crossed roller shaft is not basically enlarged; the width size of the outermost side is changed from 18mm to 9.4mm, and the radius size of the raceway is not changed, so that the weight and the volume of the raceway are greatly reduced, the equipment is favorably lightened and miniaturized, and the WSHG-25-XXX-III is particularly suitable for the technical fields of spaceflight, aviation and the like, the weight is reduced from 2.1Kg to 1.629Kg, and the weight of each product is reduced by 0.47Kg, so that the product is more favorably lightened, and the product is promoted to application occasions needing lighter weight, particularly to the aspect of spacecrafts.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (5)
1. The ultra-light roller crossed bearing comprises a bearing inner ring (32), and is characterized in that only one bearing outer ring (31) is mounted outside the bearing inner ring (32); a roller crossed cylinder (43) is arranged between the bearing inner ring (32) and the bearing outer ring (31); a first bolt hole (33) which is matched with the flexible gear (5) is formed on the bearing outer ring (31); a second bolt hole (34) connected with the output flange (42) is formed in the bearing inner ring (32); the roller cross bearing is a negative clearance; and a framework oil seal (35) is arranged between the bearing outer ring (31) and the bearing inner ring (32).
2. The ultra lightweight roller cross bearing of claim 1, wherein said skeleton oil seal (35) is secured by a bearing cap (36).
3. Ultra lightweight roller cross bearing according to claim 1, characterized in that the width of the inner bearing ring (32) is larger than the width of the outer bearing ring (31).
4. Ultra lightweight roller cross bearing according to claim 4, characterized in that the width of the inner bearing ring (32) is 16.5 ± 0.5mm and the width of the outer bearing ring (31) is 9.4 mm.
5. Ultra lightweight roller cross bearing according to claim 4, characterized in that the width of the inner bearing ring (32) is larger than the width of the outer bearing ring (31) and each is formed with a V-groove for engagement with a roller cross cylinder (43).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910947905.2A CN110566575A (en) | 2019-10-08 | 2019-10-08 | ultra-light roller crossed bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910947905.2A CN110566575A (en) | 2019-10-08 | 2019-10-08 | ultra-light roller crossed bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110566575A true CN110566575A (en) | 2019-12-13 |
Family
ID=68783902
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910947905.2A Pending CN110566575A (en) | 2019-10-08 | 2019-10-08 | ultra-light roller crossed bearing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110566575A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112628291A (en) * | 2020-12-07 | 2021-04-09 | 珠海格力电器股份有限公司 | Crossed roller bearing, harmonic reducer and robot with same |
| CN115519581A (en) * | 2022-11-28 | 2022-12-27 | 库卡机器人(广东)有限公司 | Robot joint output assembly, robot joint module and robot |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5984048A (en) * | 1997-09-10 | 1999-11-16 | Harmonic Drive Systems, Inc. | Lubricant supplying mechanism for a wave gear drive |
| CN106487158A (en) * | 2016-11-18 | 2017-03-08 | 四川福德机器人股份有限公司 | A kind of flat integration harmonic speed reducer device of built-in motor |
| CN206419450U (en) * | 2016-12-03 | 2017-08-18 | 广东宝控智能装备科技有限公司 | Ultrathin harmonic speed reducer |
| CN107339402A (en) * | 2017-09-05 | 2017-11-10 | 苏州绿的谐波传动科技有限公司 | Harmonic speed reducer |
| CN207122561U (en) * | 2017-09-08 | 2018-03-20 | 珠海飞马传动机械有限公司 | A kind of low-noise compact type harmonic wave speed reducing machine |
| CN207437582U (en) * | 2017-10-16 | 2018-06-01 | 浙江来福谐波传动股份有限公司 | A kind of crossed roller bearing of with closure |
| KR20180106120A (en) * | 2017-03-17 | 2018-10-01 | 한국기계연구원 | Integrated drive apparatus |
| CN109185424A (en) * | 2018-11-21 | 2019-01-11 | 苏州绿的谐波传动科技股份有限公司 | New harmonic retarder with leakproofness deep groove ball bearing |
| CN109667909A (en) * | 2018-12-06 | 2019-04-23 | 江苏科技大学 | A kind of short cylinder harmonic speed reducer with clearance compensation function |
| CN209309229U (en) * | 2018-11-23 | 2019-08-27 | 浙江来福谐波传动股份有限公司 | A kind of miniature harmonic speed reducer of lightweight |
-
2019
- 2019-10-08 CN CN201910947905.2A patent/CN110566575A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5984048A (en) * | 1997-09-10 | 1999-11-16 | Harmonic Drive Systems, Inc. | Lubricant supplying mechanism for a wave gear drive |
| CN106487158A (en) * | 2016-11-18 | 2017-03-08 | 四川福德机器人股份有限公司 | A kind of flat integration harmonic speed reducer device of built-in motor |
| CN206419450U (en) * | 2016-12-03 | 2017-08-18 | 广东宝控智能装备科技有限公司 | Ultrathin harmonic speed reducer |
| KR20180106120A (en) * | 2017-03-17 | 2018-10-01 | 한국기계연구원 | Integrated drive apparatus |
| CN107339402A (en) * | 2017-09-05 | 2017-11-10 | 苏州绿的谐波传动科技有限公司 | Harmonic speed reducer |
| CN207122561U (en) * | 2017-09-08 | 2018-03-20 | 珠海飞马传动机械有限公司 | A kind of low-noise compact type harmonic wave speed reducing machine |
| CN207437582U (en) * | 2017-10-16 | 2018-06-01 | 浙江来福谐波传动股份有限公司 | A kind of crossed roller bearing of with closure |
| CN109185424A (en) * | 2018-11-21 | 2019-01-11 | 苏州绿的谐波传动科技股份有限公司 | New harmonic retarder with leakproofness deep groove ball bearing |
| CN209309229U (en) * | 2018-11-23 | 2019-08-27 | 浙江来福谐波传动股份有限公司 | A kind of miniature harmonic speed reducer of lightweight |
| CN109667909A (en) * | 2018-12-06 | 2019-04-23 | 江苏科技大学 | A kind of short cylinder harmonic speed reducer with clearance compensation function |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112628291A (en) * | 2020-12-07 | 2021-04-09 | 珠海格力电器股份有限公司 | Crossed roller bearing, harmonic reducer and robot with same |
| CN115519581A (en) * | 2022-11-28 | 2022-12-27 | 库卡机器人(广东)有限公司 | Robot joint output assembly, robot joint module and robot |
| CN115519581B (en) * | 2022-11-28 | 2023-03-10 | 库卡机器人(广东)有限公司 | Robot joint output assembly, robot joint module and robot |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: No. 158, Jinsha East Road, Ningxiang high tech Industrial Park, Changsha, Hunan 410600 Applicant after: Wanxin Jinggong (Hunan) Co., Ltd Address before: No. 158, Jinsha East Road, Jinzhou new district, Ningxiang, Changsha City, Hunan Province Applicant before: WANSHSIN SEIKOU (HUNAN) Co.,Ltd. |
|
| CB02 | Change of applicant information | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20191213 |
|
| RJ01 | Rejection of invention patent application after publication |