CN115126638A - Output shaft isolator - Google Patents
Output shaft isolator Download PDFInfo
- Publication number
- CN115126638A CN115126638A CN202210660270.XA CN202210660270A CN115126638A CN 115126638 A CN115126638 A CN 115126638A CN 202210660270 A CN202210660270 A CN 202210660270A CN 115126638 A CN115126638 A CN 115126638A
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- section
- spline
- spring
- shaft
- assembling
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N15/00—Other power-operated starting apparatus; Component parts, details, or accessories, not provided for in, or of interest apart from groups F02N5/00 - F02N13/00
- F02N15/02—Gearing between starting-engines and started engines; Engagement or disengagement thereof
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- General Details Of Gearings (AREA)
Abstract
The invention provides an output shaft isolator which comprises a spline shaft, a spline sleeve, a planetary gear assembly and a driving gear, wherein the spline shaft consists of a first assembling section and a second assembling section, the first assembling section is provided with a spline section, and the end part of the spline shaft of the second assembling section is provided with a twill spline section; the spline sleeve is sleeved on the upper second assembling section of the spline shaft, and the inner wall of one end of the spline sleeve is meshed with the twill spline section; the planetary gear assembly is sleeved on the spline sleeve; the driving gear is sleeved on the spline section of the first assembling section of the spline shaft, the end part of the driving gear is provided with an end hole, and the end hole is used for receiving the end part of the spline sleeve; a return spring is sleeved on the spline shaft in the spline sleeve, and a check ring used for driving the gear to limit is installed at the other end of the spline shaft. The power transmission of the invention is stable, and the slipping phenomenon of the power transmission is avoided; prevent to take place contact between planetary gear subassembly and the drive gear the two, avoid the operation in-process unnecessary friction, eliminated the noise, the compactness is stronger.
Description
Technical Field
The invention relates to an automobile isolator, in particular to an output shaft isolator.
Background
The isolator is widely applied to an automobile starter, the components of the existing isolator comprise a driving gear, a star wheel sleeve, a spline shaft, a roller, a spring, a wafer, parts such as an outer cover and the like, the isolator not only needs to consider the problems of processing and assembly, but also needs to consider the service life and the effect of power transmission, the spline shaft in the existing isolator is directly inserted into the star wheel sleeve and rubs with the roller in the star wheel sleeve to form the power transmission, the driving gear is connected with the spline shaft through the spline, the star wheel sleeve and the driving gear in the isolator with the structure can be contacted after being assembled, abnormal sound is easy to occur in the operation process, noise is large, gaps are easy to generate for sealing the star wheel sleeve, and sundries are easy to enter to influence the service life.
In addition, the outer cover of the star wheel sleeve is generally pressed on the star wheel, the outer cover is pressed on the annular wall of the star wheel sleeve through at least two pressing marks, and the outer cover is easy to fall off once the torque between the outer cover and the star wheel sleeve is large.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides an output shaft isolator which solves the problems that the existing isolator is easy to generate abnormal sound, so that the noise is high and the service life is influenced.
The output shaft isolator comprises a spline shaft, wherein the spline shaft consists of a first assembling section and a second assembling section, the length of the first assembling section accounts for 1/3 of the spline shaft, the length of the second assembling section accounts for 2/3 of the spline shaft, the first assembling section is provided with a spline section, and the end part of the spline shaft of the second assembling section is provided with a twill spline section;
the spline sleeve is sleeved on the upper second assembling section of the spline shaft, and the inner wall of one end of the spline sleeve is meshed with the twill spline section;
the planetary gear assembly is sleeved on the spline sleeve;
the driving gear is sleeved on the spline section of the first assembling section of the spline shaft, and the end part of the driving gear is provided with an end hole for receiving the end part of the spline sleeve;
a return spring is sleeved on the spline shaft in the spline sleeve, and a check ring used for driving the gear to limit is installed at the other end of the spline shaft.
The first assembling section and the second assembling section of the spline shaft are reasonably designed in proportion, so that the star gear assembly and the driving gear can be conveniently assembled, the spline shaft is meshed with the spline sleeve by adopting the twill spline, the power transmission is more stable, the slip is not easy to occur, the planetary gear assembly is sleeved on the spline sleeve, an end hole formed in the driving gear is used for receiving the end part of the spline sleeve, the diameter of the end hole is larger than that of the end part of the spline sleeve after the end hole is formed in the driving gear, the spline sleeve and the end part of the spline sleeve can be prevented from being contacted, unnecessary friction in the operation process is avoided, the noise is eliminated, the tightness of the spline sleeve and the planetary gear assembly is stronger, and sundries can be prevented from entering.
Compared with the prior art, the invention has the following beneficial effects:
(1) the power transmission is stable, and the slipping phenomenon of the power transmission is avoided;
(2) the contact between the planetary gear assembly and the driving gear is prevented, unnecessary friction in the operation process is avoided, and noise is eliminated;
(3) the compactness is stronger, can prevent debris entering.
Drawings
FIG. 1 is a schematic view of the present invention.
Fig. 2 is a left side view (partially in section) of fig. 1.
FIG. 3 is a schematic view of the spline shaft of the present invention.
Detailed Description
The technical solution of the present invention is further explained with reference to the drawings and the embodiments.
As shown in fig. 1-3, the output shaft isolator provided by the invention is a spline shaft 1, wherein the spline shaft 1 is composed of a first assembling section 11 and a second assembling section 12, the length of the first assembling section 11 accounts for 1/3 of the spline shaft 1, the length of the second assembling section 12 accounts for 2/3 of the spline shaft 1, the spline section is arranged on the first assembling section 11, and a twill spline section 13 is arranged at the end part of the spline shaft 1 of the second assembling section 12;
the spline housing 2 is sleeved on the upper second assembling section 12 of the spline shaft 1, and the inner wall of one end of the spline housing 2 is meshed with the twill spline section;
the planetary gear assembly 3 is sleeved on the spline housing 2;
the driving gear 4 is sleeved on the spline section of the first assembling section 11 of the spline shaft 1, and the end part of the driving gear 4 is provided with an end hole for receiving the end part of the spline sleeve 2;
a return spring is sleeved on the spline shaft 1 in the spline housing 2, and a retainer ring 5 used for limiting the driving gear 4 is installed at the other end of the spline shaft 1.
The first assembling section 11 and the second assembling section 12 of the spline shaft 1 are reasonably designed in proportion, so that the star gear assembly 3 and the driving gear 4 can be conveniently assembled, the spline shaft 1 and the spline housing 2 are meshed by adopting a twill spline, the power transmission is more stable, and the planetary gear assembly 3 is sleeved on the spline housing 2, an end hole formed in the driving gear 4 is used for receiving the end part of the spline housing 2, the diameter of the end hole is larger than that of the end part of the spline housing 2, the contact between the two parts can be prevented, the friction in the operation process is avoided, the noise is eliminated, the tightness between the spline housing 2 and the planetary gear assembly 3 is stronger, and the entry of foreign matters can be prevented.
As shown in fig. 3, the diameter of the second assembling section 12 of the twill spline section 13 is larger than the diameters of other sections of the second assembling section 12, so as to form a ring platform for supporting the return spring, and the ring platform is positioned in the spline housing 2. After the twill spline section 13 is in splined connection with the spline housing 2, power can be stably transmitted, and a space support can be provided for installing a return spring between the spline shaft 1 and the spline housing 2, so that the second assembling section 12 of the spline shaft 1 and the spline housing 2 are more reasonable in assembling structure, and stronger in sealing performance.
As shown in fig. 1, the planetary gear assembly 3 includes a star gear housing 31, a cover 32, a circular washer 33, a roller 34, and a spring 35; a plurality of accommodating grooves are formed in the inner wall of the planetary gear shell 31, each accommodating groove is composed of a spring accommodating section 38 and a roller accommodating section 36, the cross section of the spring accommodating section 38 in the planetary gear shell 31 is higher than that of the roller accommodating section 36 in the planetary gear shell 31, an arc-shaped connecting section 37 is arranged between the spring accommodating section 38 and the roller accommodating section 36, and a limit stop is arranged between two adjacent accommodating grooves; the roller 34 is placed in the roller containing section 36, the spring 35 is positioned in the spring containing section 38, one end of the spring 35 abuts against the roller 34, and the other end abuts against the limit stop table; the shroud 32 lid is at the open end of planetary gear housing 31's holding tank, the round gasket 33 is located and seals the roller 34 and the spring 35 assembly section of planetary gear housing 31 between shroud 32 and planetary gear housing 31, prevents that debris from getting into, be provided with the spacing annular on the planetary gear housing 31, the tip of shroud 32 is impressed in the spacing annular.
The number of the accommodating grooves can be five or six, five accommodating grooves are adopted in the invention, after the rollers 34 and the springs 35 are all placed in the accommodating grooves, power transmission can be formed through friction between the rollers 34 and the outer wall of the spline housing 2, the limiting stop table is used for supporting the springs 35 and limiting the rollers 34, so that the rollers 34 move in the roller accommodating section 36, the limiting ring grooves can be pre-opened on the outer wall of the planetary gear housing 31, the edge of the outer cover can be pressed into the limiting ring grooves when the outer cover is riveted, the outer cover is in close contact with the planetary gear housing 31, gaps are eliminated, the sealing performance is increased, the outer cover can bear 50 N.m of torque, and inclined planes for increasing the strength are formed near the edge of the outer cover. For convenience of installation, bearings can be sleeved on the spline sleeves 2 on two sides of the planetary gear assembly 3, and deep groove ball bearings can be adopted as the bearings.
As shown in fig. 3, the first block section 11 is connected to the second block section 12 by a transition section 14, which has a smaller diameter than the rest of the first block section 11 (to facilitate the spline machining), and the transition section 14 occupies 1/6 of the first block section 11. The transition section 14 is connected with the other parts of the first assembling section 11 through inclined surfaces. A buffer spring 7 sleeved on the spline shaft 1 of the first assembling section 11 is arranged in the driving gear 4, a gasket 8 is sleeved on the transition section 14, one end of the buffer spring 7 abuts against the gasket 8, and the other end of the buffer spring abuts against an inner hole boss arranged on the driving gear 4.
The changeover portion occupies 1/6 of first assembly section 11 for buffer spring's position is reasonable, and the cushioning effect is better, and the diameter of this changeover portion processing diminishes, in order to make things convenient for assembly packing ring 8, drive gear 4 hole addition spline section and buffer spring hold the section, and buffer spring holds the internal diameter of section and is greater than the internal diameter of spline section so that have the space that holds buffer spring's space and packing ring, makes packing ring 8 not occupy too big space, makes the structure compacter.
As shown in fig. 1, in order to limit the position of the driving gear 4 and place the driving gear 4 to move axially, a clamp spring 6 located in front of the driving gear 4 is arranged on the first assembly section 11, and a clamping groove matched with the clamp spring 6 is arranged in the retainer ring 5.
Claims (8)
1. An output shaft isolator is characterized by comprising
The spline shaft comprises a first assembling section and a second assembling section, the length of the first assembling section accounts for 1/3 of the spline shaft, the length of the second assembling section accounts for 2/3 of the spline shaft, the spline section is arranged on the first assembling section, and a twill spline section is arranged at the end part of the spline shaft of the second assembling section;
the spline sleeve is sleeved on the upper second assembling section of the spline shaft, and the inner wall of one end of the spline sleeve is meshed with the twill spline section;
the planetary gear assembly is sleeved on the spline sleeve;
the driving gear is sleeved on the spline section of the first assembling section of the spline shaft, and the end part of the driving gear is provided with an end hole for receiving the end part of the spline sleeve;
a return spring is sleeved on the spline shaft in the spline sleeve, and a check ring used for driving the gear to limit is installed at the other end of the spline shaft.
2. An output shaft isolator as claimed in claim 1, wherein the diameter of the second assembly section of said twill spline sections is greater than the diameter of the other sections of the second assembly section, forming a land for supporting the return spring, said land being located within the spline housing.
3. An output shaft isolator as claimed in claim 2, wherein the planetary gear assembly comprises a star gear housing, a cover, a washer, a roller and a spring;
the inner wall of the star gear shell is provided with a plurality of accommodating grooves, each accommodating groove is composed of a spring accommodating section and a roller accommodating section, the section of the spring accommodating section in the star gear shell is higher than that of the roller accommodating section in the star gear shell, an arc-shaped connecting section is arranged between the spring accommodating section and the roller accommodating section, and a limiting stop table is arranged between every two adjacent accommodating grooves;
the roller is placed in the roller containing section, the spring is positioned in the spring containing section, one end of the spring abuts against the roller, and the other end of the spring abuts against the limiting stop table;
the shroud lid is at the open end of the holding tank of planet gear casing, the gasket is located between shroud and the planet gear casing, be provided with spacing annular on the star gear casing, the tip of shroud is impressed in the spacing annular.
4. An output shaft isolator as claimed in claim 3, wherein bearings are sleeved on the spline housing on both sides of the planetary gear assembly.
5. An output shaft isolator as claimed in claim 1, wherein the first mounting section is connected to the second mounting section by a transition section having a diameter less than the other diameters of the first mounting section, the transition section occupying 1/6 of the first mounting section.
6. An output shaft isolator as claimed in claim 5, wherein a buffer spring is provided in the drive gear and fitted over the splined shaft of the first mounting section, and a washer is fitted over said transition section, said buffer spring having one end abutting the washer and the other end abutting a boss provided in the bore of the drive gear.
7. An output shaft isolator as claimed in claim 6, wherein said transition section is connected to the remainder of the first mounting section by a ramp.
8. The output shaft isolator of claim 1, wherein a snap spring is provided on the first mounting section in front of the drive gear, and wherein a snap groove is provided in the retainer ring for engaging with the snap spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210660270.XA CN115126638A (en) | 2022-06-13 | 2022-06-13 | Output shaft isolator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210660270.XA CN115126638A (en) | 2022-06-13 | 2022-06-13 | Output shaft isolator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115126638A true CN115126638A (en) | 2022-09-30 |
Family
ID=83377093
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210660270.XA Pending CN115126638A (en) | 2022-06-13 | 2022-06-13 | Output shaft isolator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115126638A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200971828Y (en) * | 2006-09-29 | 2007-11-07 | 张孝东 | Starter gearing for staier vehicle |
| CN206617470U (en) * | 2017-03-17 | 2017-11-07 | 无锡市神力齿轮冷挤有限公司 | Drive gear detachable one-way clutch |
| CN113062825A (en) * | 2021-03-24 | 2021-07-02 | 东风电驱动系统有限公司 | A high reliability unidirectional device |
-
2022
- 2022-06-13 CN CN202210660270.XA patent/CN115126638A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200971828Y (en) * | 2006-09-29 | 2007-11-07 | 张孝东 | Starter gearing for staier vehicle |
| CN206617470U (en) * | 2017-03-17 | 2017-11-07 | 无锡市神力齿轮冷挤有限公司 | Drive gear detachable one-way clutch |
| CN113062825A (en) * | 2021-03-24 | 2021-07-02 | 东风电驱动系统有限公司 | A high reliability unidirectional device |
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