CN111637209A - Integral differential housing - Google Patents
Integral differential housing Download PDFInfo
- Publication number
- CN111637209A CN111637209A CN202010623760.3A CN202010623760A CN111637209A CN 111637209 A CN111637209 A CN 111637209A CN 202010623760 A CN202010623760 A CN 202010623760A CN 111637209 A CN111637209 A CN 111637209A
- Authority
- CN
- China
- Prior art keywords
- differential
- reduction gear
- main reduction
- shell
- gear
- 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
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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
- F16H—GEARING
- F16H48/00—Differential gearings
- F16H48/38—Constructional details
- F16H48/40—Constructional details characterised by features of the rotating cases
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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
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/02—Toothed members; Worms
- F16H55/06—Use of materials; Use of treatments of toothed members or worms to affect their intrinsic material properties
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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
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/023—Mounting or installation of gears or shafts in the gearboxes, e.g. methods or means for assembly
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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
- F16H48/00—Differential gearings
- F16H48/38—Constructional details
- F16H2048/382—Methods for manufacturing differential gearings
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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
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/02—Toothed members; Worms
- F16H55/06—Use of materials; Use of treatments of toothed members or worms to affect their intrinsic material properties
- F16H2055/065—Moulded gears, e.g. inserts therefor
Abstract
The invention discloses an integral differential shell, which comprises a differential shell integrally in a spherical shell structure, wherein the left side and the right side of the differential shell are respectively provided with a half axle gear hole, and the vertical two sides of the differential shell are respectively provided with a planetary shaft hole; the outer part of the left side of the differential shell is sleeved with a main reduction gear which is characterized in that; the axis of the main reduction gear is superposed with the axes of the two half shaft gear holes; and the differential case and the main reduction gear are integrally formed. The invention has the advantages of reduced cost, improved precision, and simple and compact structure.
Description
Technical Field
The invention belongs to the technical field of differential shells, and particularly relates to an integral differential shell.
Background
The integral differential housing structure generally includes a differential housing with an integral design and a main reduction gear sleeved outside the differential housing, and the main reduction gear is in transmission connection with the reducer housing.
The connection method for batch use between the differential case and the main reduction gear on the market at present is bolt connection or rivet riveting. As shown in fig. 1, the differential case has a connection portion with a ring-shaped plate structure along the left side of the differential case, and the inner side edge portion of one end surface of the main reduction gear is attached to the connection portion and then connected and driven by a plurality of screws which are uniformly distributed along the circumferential direction. In the prior art, splines are also used for connection, and the chinese patent application (CN110905989A) discloses a differential case and a gear assembly, which includes a case, a transmission gear is sleeved on the outer periphery of the case, an external spline is arranged on the outer periphery of the case, an internal spline is arranged on the central hole wall of the transmission gear, and the external spline and the internal spline form a spline connection structure for limiting the transmission gear from rotating circumferentially relative to the case; the periphery of the shell is also provided with a flange which is arranged on one side of the external spline and is abutted against the side surface of the transmission gear; the outer spline is close to flange one side and is less than the outer spline and deviates from flange one side, and the distance L1 of the side that the outer spline deviates from flange one side and flange is greater than the wheel hub width L2 of driving tooth, and the outer spline is used for restricting the relative casing axial float of driving tooth with the flange combined action. The above-mentioned patent adopts external spline and internal spline transmission, and what correspond sets up limit structure again is in order to restrict main reduction gear axial leap up and move. It is also known to connect the differential case and the final reduction gear by laser welding.
However, the above structure has various problems: 1, the differential shell and the main reduction gear are assembled after being processed and manufactured respectively, so that the processing procedures are more, the cost is high, and extra bolt cost is required; 2, the precision is low after the differential shell and the main reduction gear are assembled, and particularly, the actual use precision of the main reduction gear is poor and the noise is large due to assembly errors; 3, bolt connection and riveting are adopted, a connecting hole needs to be processed between the differential shell and the main reduction gear, and the structure is complex and inconvenient to arrange; 4 also results in increased weight and compromised strength after overall assembly.
Therefore, it is a technical problem to be solved by those skilled in the art to provide a one-piece differential case with smaller weight, higher precision, lower cost, and simpler and more compact structure.
Disclosure of Invention
Aiming at the defects of the prior art, the technical problems to be solved by the invention are as follows: how to provide a weight is littleer, the precision is higher, and the cost is lower, the compact integral differential mechanism casing of simple structure more.
In order to solve the technical problems, the invention adopts the following technical scheme:
the integral differential shell comprises a differential shell, wherein the left side and the right side of the differential shell are respectively provided with a half axle gear hole, and the vertical two sides of the differential shell are respectively provided with a planet axle hole; a main reduction gear is sleeved outside the left side of the differential shell; it is characterized in that; the differential case and the main reduction gear are integrally formed.
Thus, the differential shell with the structure is obtained by integrally forming the differential shell and the main reduction gear, and has the advantages that 1, the existing bolt connection mode is obtained by integrally casting and forming because the differential shell and the gear are finished products and the actual action precision of the gear is lower due to the manufacturing tolerance of parts after connection, and the final gear is obtained by grinding the gear after heating, so that the design and use precision of the final gear is greatly improved, and the NVH performance is improved. 2, the mode of carrying out dynamic balance test on the finished product is adopted, so that the processing cost can be reduced, the noise caused by poor dynamic balance can be reduced, and the NVH performance is improved. 3, in the existing bolt or rivet connection mode, because the two connecting parts need to be partially overlapped, and holes are arranged at the overlapped part for connecting through bolts, the weight is heavier and the connection is not compact enough; by adopting an integral mode and CAE analysis optimization design, redundant materials are processed and removed under the condition of ensuring the strength, so that the weight can be effectively reduced, and the requirement of light weight is met. 4 the existing bolt or rivet connection mode depends on the friction force generated by the pretightening force of the bolt to transmit the torque, the torque transmission capacity is limited, and the integral type connection mode can greatly improve the torque transmission capacity. The structure has the characteristics of smaller weight, higher precision, lower cost and simpler and more compact structure.
Preferably, the differential case and the main reduction gear are integrally cast.
Like this, differential mechanism casing and main reduction gear are casting forming as an organic whole, for forging or other integrated into one piece modes, can make things convenient for processing manufacturing more.
Preferably, the axis of the main reduction gear is overlapped with the axes of the two half shaft gear holes.
Preferably, the differential shell is integrally arranged in a spherical shell structure.
As optimization, the transmission gear on the outer circumference of the main reduction gear is obtained by quenching.
Thus, the local quenching can be performed on the portion with higher strength requirement, the strength of the main reduction gear can be improved, and the service life can be prolonged.
Preferably, the main reduction gear includes a connecting portion that is sleeved on the differential case and has an annular plate-like structure on the inner side, and further includes a tooth-shaped portion that is an annular plate-like structure on the outer side, and the thickness of the tooth-shaped portion is greater than that of the connecting portion, and the outer circumferential surface of the tooth-shaped portion is provided with the transmission teeth.
Therefore, the thickness of the tooth-shaped part is larger than that of the connecting part, and the design is more reasonable.
Preferably, a plurality of lightening holes are uniformly arranged on the connecting part along the circumferential direction of the connecting part.
Thus, the weight reduction effect can be achieved.
Drawings
Fig. 1 is a schematic structural view of a prior art differential case and a main reduction gear connected by a bolt assembly.
Fig. 2 is a schematic structural diagram of an embodiment of the present invention.
Detailed Description
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
referring to FIG. 2: the integral differential shell comprises a differential shell 1, wherein the left side and the right side of the differential shell are respectively provided with a half-shaft gear hole 2, and the vertical two sides of the differential shell are respectively provided with a planetary shaft hole 3; and a main reduction gear 4 is sleeved outside the left side of the differential shell, and the differential shell and the main reduction gear are integrally formed.
Thus, the differential shell with the structure is obtained by integrally forming the differential shell and the main reduction gear, and has the advantages that 1, the existing bolt connection mode is obtained by integrally casting and forming because the differential shell and the gear are finished products and the actual action precision of the gear is lower due to the manufacturing tolerance of parts after connection, and the final gear is obtained by grinding the gear after heating, so that the design and use precision of the final gear is greatly improved, and the NVH performance is improved. 2, the mode of carrying out dynamic balance test on the finished product is adopted, so that the processing cost can be reduced, the noise caused by poor dynamic balance can be reduced, and the NVH performance is improved. 3, in the existing bolt or rivet connection mode, because the two connecting parts need to be partially overlapped, and holes are arranged at the overlapped part for connecting through bolts, the weight is heavier and the connection is not compact enough; by adopting an integral mode and CAE analysis optimization design, redundant materials are processed and removed under the condition of ensuring the strength, so that the weight can be effectively reduced, and the requirement of light weight is met. 4 the existing bolt or rivet connection mode depends on the friction force generated by the pretightening force of the bolt to transmit the torque, the torque transmission capacity is limited, and the integral type connection mode can greatly improve the torque transmission capacity. The structure has the characteristics of smaller weight, higher precision, lower cost and simpler and more compact structure.
In the present embodiment, the differential case 1 and the final reduction gear 4 are integrally cast.
Like this, differential mechanism casing and main reduction gear are casting forming as an organic whole, for forging or other integrated into one piece modes, can make things convenient for processing manufacturing more.
In this embodiment, the axis of the main reduction gear and the axes of the two side gear holes are arranged to overlap.
In this embodiment, the differential case is integrally provided in a spherical shell structure.
In the present embodiment, the transmission teeth provided on the outer circumferential surface of the main reduction gear 4 are obtained by quenching.
Thus, the local quenching can be performed on the portion with higher strength requirement, the strength of the main reduction gear can be improved, and the service life can be prolonged.
In this embodiment, the main reduction gear 4 includes an inner connecting portion 5 that is sleeved on the differential case and has an annular plate-like structure, and further includes an outer tooth-shaped portion 6 that has an annular plate-like structure, and the thickness of the tooth-shaped portion is greater than that of the connecting portion, and a transmission gear is disposed on an outer circumferential surface of the tooth-shaped portion.
Therefore, the thickness of the tooth-shaped part is larger than that of the connecting part, and the design is more reasonable.
In the present embodiment, a plurality of lightening holes 7 are uniformly provided in the connecting portion 5 in the circumferential direction thereof. Thus, the weight reduction effect can be achieved.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (7)
1. The integral differential shell comprises a differential shell, wherein the left side and the right side of the differential shell are respectively provided with a half axle gear hole, and the vertical two sides of the differential shell are respectively provided with a planet axle hole; a main reduction gear is sleeved outside the left side of the differential shell; it is characterized in that; the differential case and the main reduction gear are integrally formed.
2. The one-piece differential case defined in claim 1, wherein: the differential shell and the main reduction gear are integrally cast and molded.
3. The one-piece differential case defined in claim 1, wherein: the axis of the main reduction gear is superposed with the axes of the two half shaft gear holes.
4. The one-piece differential case defined in claim 1, wherein: the differential shell is integrally arranged in a spherical shell structure.
5. The one-piece differential case defined in claim 1, wherein: the transmission gear arranged on the outer circumferential surface of the main reduction gear is obtained by quenching.
6. The one-piece differential case defined in claim 1, wherein: the main reduction gear comprises a connecting part which is sleeved on the differential shell and is of an annular plate structure on the inner side, and further comprises a tooth-shaped part which is of an annular plate structure on the outer side, the thickness of the tooth-shaped part is larger than that of the connecting part, and transmission teeth are arranged on the outer circumferential surface of the tooth-shaped part.
7. The one-piece differential case defined in claim 6, wherein: a plurality of lightening holes are uniformly arranged on the connecting part along the circumferential direction of the connecting part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010623760.3A CN111637209A (en) | 2020-06-30 | 2020-06-30 | Integral differential housing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010623760.3A CN111637209A (en) | 2020-06-30 | 2020-06-30 | Integral differential housing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111637209A true CN111637209A (en) | 2020-09-08 |
Family
ID=72329970
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010623760.3A Pending CN111637209A (en) | 2020-06-30 | 2020-06-30 | Integral differential housing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111637209A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09229162A (en) * | 1996-02-26 | 1997-09-02 | Yanagawa Seiki Kk | Differential |
| JP2009097716A (en) * | 2007-09-28 | 2009-05-07 | Musashi Seimitsu Ind Co Ltd | Differential gear |
| CN205331353U (en) * | 2016-02-03 | 2016-06-22 | 盛瑞传动股份有限公司 | Primary speed reducing gear wheel and differential mechanism seam structure |
| DE112014004886T5 (en) * | 2013-10-25 | 2016-07-14 | Aisin Takaoka Co., Ltd. | Differential device component, differential device having the same, and manufacturing method thereof |
| CN212318702U (en) * | 2020-06-30 | 2021-01-08 | 重庆神箭汽车传动件有限责任公司 | Integral differential mechanism shell |
-
2020
- 2020-06-30 CN CN202010623760.3A patent/CN111637209A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09229162A (en) * | 1996-02-26 | 1997-09-02 | Yanagawa Seiki Kk | Differential |
| JP2009097716A (en) * | 2007-09-28 | 2009-05-07 | Musashi Seimitsu Ind Co Ltd | Differential gear |
| DE112014004886T5 (en) * | 2013-10-25 | 2016-07-14 | Aisin Takaoka Co., Ltd. | Differential device component, differential device having the same, and manufacturing method thereof |
| CN205331353U (en) * | 2016-02-03 | 2016-06-22 | 盛瑞传动股份有限公司 | Primary speed reducing gear wheel and differential mechanism seam structure |
| CN212318702U (en) * | 2020-06-30 | 2021-01-08 | 重庆神箭汽车传动件有限责任公司 | Integral differential mechanism shell |
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