CN110566650A - differential and vehicle comprising same - Google Patents
differential and vehicle comprising same Download PDFInfo
- Publication number
- CN110566650A CN110566650A CN201810574268.4A CN201810574268A CN110566650A CN 110566650 A CN110566650 A CN 110566650A CN 201810574268 A CN201810574268 A CN 201810574268A CN 110566650 A CN110566650 A CN 110566650A
- Authority
- CN
- China
- Prior art keywords
- differential
- planetary gear
- carrier
- cover
- planet
- 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
-
- 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
- F16H37/00—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00
- F16H37/02—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings
- F16H37/06—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts
- F16H37/08—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing
- F16H37/0806—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing with a plurality of driving or driven shafts
- F16H37/0813—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing with a plurality of driving or driven shafts with only one input shaft
- F16H37/082—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing with a plurality of driving or driven shafts with only one input shaft and additional planetary reduction gears
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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
- F16H48/06—Differential gearings with gears having orbital motion
- F16H48/08—Differential gearings with gears having orbital motion comprising bevel gears
-
- 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
-
- 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
- F16H57/037—Gearboxes for accommodating differential gearings
-
- 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
- F16H57/08—General details of gearing of gearings with members having orbital motion
- F16H57/082—Planet carriers
Abstract
The invention relates to a differential and a vehicle comprising the same. The differential comprises a differential shell and a planetary gear set used for rotating the differential shell, wherein the planetary gear set comprises a planetary gear, a planetary gear shaft and a planet carrier which are used as power output ends, the planetary gear rotates the planet carrier through the planetary gear shaft, and the planet carrier is connected with the differential shell in a torsion-resistant mode. The planetary gears are formed integrally with the planetary gear shafts. The differential further includes a differential cover for covering the planetary gear set at one end, the differential cover being fixed to the differential case, and the planetary gear shafts being rotatably embedded at both ends thereof in the differential cover and the carrier, respectively, so that the planetary gears are rotatably held between the differential cover and the carrier. The differential mechanism has the advantages of flexible size, simple manufacture and convenient assembly.
Description
Technical Field
The present invention relates to the field of differentials. In particular, the present invention relates to a differential integrated with a planetary gear set and a vehicle including such a differential.
Background
The angular velocities of the left and right drive wheels are often not equal during vehicle travel. In this case, if a differential is not provided on the vehicle and both drive wheels are fixed to the same rigid rotating shaft, a roll-over phenomenon inevitably occurs in the drive wheels. This phenomenon may lead to wear of the tires and to a loss of power, and may even result in the vehicle not being able to steer. Therefore, a differential is used in a vehicle to cause the vehicle to achieve a differential speed between left and right drive wheels when the vehicle is traveling in a non-straight line, so that the vehicle travels normally.
The existing differential is mainly formed by integrating a planetary gear set and a bevel gear differential. In which a planetary gear is fixedly connected to a differential case, the planetary gear is generally supported on a planetary gear shaft by a long needle bearing, the inner hole diameter of the planetary gear is limited by the dimensions of the planetary gear shaft and the needle bearing, and the outer diameter of the planetary gear is correspondingly limited, so that it is difficult to use a small planetary gear. This in turn limits the gear ratio of the entire planetary gear set, making it difficult to obtain a large gear ratio in a compact space. Meanwhile, as the planet gear shaft and the longer needle bearing are arranged, more parts with higher price are needed, and the manufacturing cost is increased. In addition, conventional differentials secure the in-line shaft to the differential case by inserting pins into pin holes in the in-line shaft and the differential case. Such a construction is often difficult to disassemble and assemble, and if the interference between the pins and the pin holes is too great, the differential may be damaged; if the interference is too small, the pin may fall off from the pin hole, and the straight shaft may fall off, and the fallen straight shaft may cause secondary damage to other components in the transmission.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to provide a differential gear which has the advantages of flexible size, simple manufacture and convenient assembly.
the above-mentioned technical problem is solved by a differential according to the present invention. The differential includes a differential case and a planetary gear set for rotating the differential case, the planetary gear set including a planetary gear as a power output end, a planetary gear shaft, and a planetary carrier, the planetary gear rotating the planetary carrier through the planetary gear shaft, the planetary carrier being connected to the differential case in a torque-proof manner, so that the planetary gear rotates the differential case. According to an aspect of the present invention, the planetary gears are formed integrally with the planetary gear shafts, and the differential further includes a differential cover for covering the planetary gears on a side opposite to the carrier, the differential cover being fixed to the differential case, and both ends of the planetary gear shafts are rotatably embedded in the differential cover and the carrier, respectively, so that the planetary gears are rotatably held between the differential cover and the carrier. Since the planetary gear is formed integrally with the planetary gear shaft, the overall diameter of the planetary gear is no longer limited by the planetary gear shaft and the needle bearing, and thus a large transmission ratio can be obtained with a compact structure.
according to a preferred embodiment of the present invention, both ends of the pinion shaft are supported in the differential case and the carrier by needle bearings, respectively. Since the planet gears are formed integrally with the planet pins, the planet gears of this embodiment do not require the long needle bearings of the prior art, but rather a set of shorter needle bearings are provided at each end of the pinion pins to reduce wear between the planet pins and the carrier/differential cover, which can reduce manufacturing costs to some extent. Preferably, a washer is provided between the radial end face of the planetary gear and the differential case and/or between the radial end face of the planetary gear and the carrier. The washer can reduce the abrasion on the contact surfaces of the planetary gear, the differential cover and the planet carrier because the planetary gear and the differential cover and the planet carrier respectively have relative movement.
According to a further preferred embodiment of the invention, a bushing is provided between the planet gear and the differential cover/between the planet gear and the planet carrier, wherein the bushings each have an axial portion and a radial portion, the axial portions being arranged between the planet gear shaft and the differential cover/between the planet gear shaft and the planet carrier, respectively, and the radial portions being arranged between the radial end faces of the planet gear and the differential cover/between the radial end faces of the planet gear and the planet carrier, respectively. The bushing may reduce wear between the planet gear and the differential cover/carrier as the planet gear rotates.
According to another preferred embodiment of the present invention, the differential further comprises a line shaft fixed to the differential case and capable of being rotated by the differential case, wherein grooves are respectively provided at positions of the differential case engaged with both ends of the line shaft, and snap rings are installed in the grooves and engaged with end surfaces of the line shaft, respectively, thereby preventing the line shaft from being separated from the differential case when the line shaft is rotated. Preferably, the snap ring is made of an elastic material. Use snap ring to fix at the both ends of a word axle, need not to drill on a word axle and differential mechanism casing, avoided the influence to differential mechanism structural strength, easily dismouting simultaneously to reduced a word axle and dropped the risk that causes the secondary damage.
According to another preferred embodiment of the present invention, the differential cover is fixed to the differential case via bolts. Preferably, the planet carrier is formed integrally with the differential case. The differential cover is directly connected with the differential shell, and the planetary gear can drive the differential shell to rotate through the planetary carrier and the differential cover at the same time. This arrangement makes the differential easier to assemble and disassemble.
The above problem is solved according to the invention by a vehicle comprising a differential having the above features.
Drawings
The invention is further described below with reference to the accompanying drawings. Identical reference numbers in the figures denote functionally identical elements. Wherein:
FIG. 1 is a cross-sectional schematic view of a differential according to an embodiment of the present invention;
FIG. 2 is a cross-sectional schematic view of a differential according to another embodiment of the present invention.
Detailed Description
FIG. 1 is a cross-sectional schematic view of a differential according to an embodiment of the present invention. As shown in fig. 1, the differential according to the present invention integrates a planetary gear set and a bevel gear differential. Wherein, the planet ring gear 8 of the planetary gear set is fixed on the gear box shell 9 by a snap ring 10, the sun gear 1 and the planet ring gear 8 are coaxially arranged, and the planet gear 2 is respectively meshed with the inner side of the ring gear 8 and the sun gear 1. The planetary gears 2 are formed integrally with their planetary gear shafts, and both ends of the planetary gear shafts of the planetary gears 2 are rotatably embedded in the differential case 5 and the carrier 19, respectively. In the present exemplary embodiment, needle bearings 15 are provided between the planet gear shafts and the differential cover 5, respectively needle bearings 16 are provided between the planet gear shafts and the planet carrier 19, and the planet gears 2 are rotated about their own axes relative to the differential cover 5/the planet carrier 19 by means of the needle bearings 15, 16. The differential cover 5 and the carrier 19 are each formed in a boss-shaped configuration on the side facing the planetary gear 2, a space accommodating the needle roller bearings 15, 16 being formed between the boss-shaped configuration and the planetary gear 2, the boss-shaped configuration and the end faces of the planetary gear 2 together limiting the axial movement of the needle roller bearings 15, 16. A washer 3 is provided between one side radial end surface of the planetary gear 2 and the differential cover 5, and a washer 4 is provided between the other side radial end surface of the planetary gear 2 and the carrier 19, respectively, and the washers 3 and 4 can reduce wear between the end surfaces when the planetary gear 2 rotates relative to the differential cover 5 and the carrier 19. The differential cover 5 and the differential case 7 are provided with corresponding holes through which bolts 6 are passed to fix the differential cover 5 to the differential case 7. The carrier 19 is formed integrally with the differential case 7. The sun gear 1 is used as an input end to drive the planet gear 2 to move, and the planet gear 2 can rotate around the planet gear shaft while revolving around the sun gear 1. The revolution of the planetary gears 2 causes the differential cover 5 and the carrier 19 to rotate, thereby rotating the entire differential case 7.
The other side of the differential housing mounts a bevel gear set with the in-line shaft 11 of the bevel gear 14 fixed into the differential housing 7 in a direction perpendicular to the sun gear axis. Grooves are provided in the differential case 7 at positions engaged with both ends of the in-line shaft 11, respectively, in which snap rings 12, 13 made of an elastic material are fitted, respectively. When the in-line shaft 11 is mounted in the differential case 7, the snap rings 12, 13 are engaged with both side end surfaces of the in-line shaft 11, respectively, thereby restricting axial movement of the in-line shaft 11 and preventing it from falling out of the differential case 7. And because the snap rings 12, 13 are made of an elastic material, certain assembly tolerances are allowed without affecting the structural strength of the differential.
FIG. 2 is a cross-sectional schematic view of a differential according to another embodiment of the present invention. The differential shown in fig. 2 differs from fig. 1 only in that no needle bearings 15, 16 or washers 3, 4 are provided between the planet gears 2 and the differential cover 5 and the planet carrier 19, but instead bushings 17, 18 are provided. The bushings 17, 18 have axial portions and radial portions, respectively, the axial portions being disposed between the planetary gear shafts and the differential cover 5/between the planetary gear shafts and the carrier 19, and the radial portions being disposed between the radial end surfaces of the planetary gears 2 and the differential cover 5/between the radial end surfaces of the planetary gears 2 and the carrier 19, respectively. In this configuration, the side of the differential cover 5 facing the planetary gears 2 does not have a boss-shaped structure. The bushings 17, 18 can reduce wear between the differential cover 5/carrier 19 when the planetary gears 2 rotate. This configuration is not suitable for high speed, high load applications.
Although possible embodiments have been described by way of example in the above description, it should be understood that numerous embodiment variations exist, still by way of combination of all technical features and embodiments that are known and that are obvious to a person skilled in the art. It should also be appreciated that the exemplary embodiment or exemplary embodiments are only examples, and are not intended to limit the scope, applicability, or configuration of the invention in any way. From the foregoing description, one of ordinary skill in the art will more particularly provide a technical guide to convert at least one exemplary embodiment, wherein various changes may be made, particularly in matters of function and structure of the components described, without departing from the scope of the following claims.
Reference numerals
1 Sun Gear
2 planetary gear
3. 4 gasket
5 differential case cover
6 bolt
7 differential case
8 planetary gear ring
9 Gear case shell
10. 12, 13 snap ring
11 straight shaft
14 bevel gear
15. 16 needle roller bearing
17. 18 liner
19 planetary carrier
Claims (9)
1. A differential, comprising a differential housing (7) and a planetary gear set for rotating the differential housing (7), which planetary gear set comprises planetary gears (2) as power take-off, planetary gear shafts and a planet carrier (19), wherein the planetary gears (2) rotate the planet carrier (19) via the planetary gear shafts, the planet carrier (19) being connected to the differential housing (7) in a rotationally fixed manner,
It is characterized in that the preparation method is characterized in that,
The planetary gears (2) are formed integrally with the planetary gear shafts, and the differential further includes a differential cover (5) for covering the planetary gears (2) on a side opposite to the carrier (19), the differential cover (5) being fixed to the differential case (7), and both ends of the planetary gear shafts are rotatably embedded in the differential cover (5) and the carrier (19), respectively, so that the planetary gears are rotatably held between the differential cover (5) and the carrier (19).
2. Differential according to claim 1, characterized in that the planet shafts are supported at both ends in the differential cover (5) and in the planet carrier (19) by means of needle bearings (15, 16), respectively.
3. Differential according to claim 2, characterized in that a washer (3, 4) is provided between a radial end face of the planet gear (2) and the differential cover (5) and/or between a radial end face of the planet gear (2) and the planet carrier (19).
4. The differential according to claim 1, characterized in that a bush (17, 18) is provided between the planetary gear (2) and the differential cover (5) and between the planetary gear (2) and the carrier (19), respectively, wherein the bushes (17, 18) have axial portions disposed between the pinion shafts and the differential cover (5) and between the pinion shafts and the carrier (19), respectively, and radial portions disposed between the radial end surfaces of the planetary gear (2) and the differential cover (5) and between the radial end surfaces of the planetary gear (2) and the carrier (19), respectively.
5. The differential according to claim 1, further comprising a straight shaft (11), wherein the straight shaft (11) is fixed to the differential case (7) and can be rotated by the differential case (7), wherein grooves are provided in the differential case (7) at positions where both ends of the straight shaft (11) are engaged, and snap rings (12, 13) are installed in the grooves, and the snap rings (12, 13) are engaged with end surfaces of the straight shaft (11), respectively, thereby preventing the straight shaft (11) from being disengaged from the differential case (7) when rotating.
6. Differential according to claim 5, characterized in that the snap rings (12, 13) are made of an elastic material.
7. Differential according to claim 1, characterized in that the differential cover (5) is fixed to the differential case (7) via bolts (6).
8. Differential according to claim 1, characterized in that the planet carrier (19) is formed integrally with the differential housing (7).
9. A vehicle comprising a differential according to any one of claims 1 to 8.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810574268.4A CN110566650A (en) | 2018-06-06 | 2018-06-06 | differential and vehicle comprising same |
| DE102019115283.6A DE102019115283A1 (en) | 2018-06-06 | 2019-06-06 | A differential gear and a vehicle with a differential gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810574268.4A CN110566650A (en) | 2018-06-06 | 2018-06-06 | differential and vehicle comprising same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110566650A true CN110566650A (en) | 2019-12-13 |
Family
ID=68652270
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810574268.4A Pending CN110566650A (en) | 2018-06-06 | 2018-06-06 | differential and vehicle comprising same |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN110566650A (en) |
| DE (1) | DE102019115283A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114393377B (en) * | 2021-12-21 | 2023-10-31 | 安徽星瑞齿轮传动有限公司 | New energy automobile speed reducer and differential assembly method for grinding main speed reducing gear |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003127682A (en) * | 2001-10-22 | 2003-05-08 | Fuji Heavy Ind Ltd | Vehicle drive unit |
| US20060063634A1 (en) * | 2003-12-05 | 2006-03-23 | Joseph Szuba | Differential mechanism for a vehicle and method of forming the same |
| JP2006349046A (en) * | 2005-06-15 | 2006-12-28 | Nissan Motor Co Ltd | Pinion support structure of planetary gear |
| CN101602326A (en) * | 2009-07-06 | 2009-12-16 | 奇瑞汽车股份有限公司 | A kind of differential retarder |
| CN201884620U (en) * | 2010-11-16 | 2011-06-29 | 浙江吉利汽车研究院有限公司 | Fixing structure of planetary gear shaft of differential gear |
| CN201985686U (en) * | 2011-05-04 | 2011-09-21 | 李领领 | Dual-output motor transmission integrated system |
| DE102010032252A1 (en) * | 2010-07-26 | 2012-01-26 | Schaeffler Technologies Gmbh & Co. Kg | Gear box, has circular disk-shaped axial stops integrally formed with radial hollow component and radially projecting from hollow component, where hollow component is arranged between spigots and planetary carrier |
| CN102582426A (en) * | 2012-03-30 | 2012-07-18 | 长城汽车股份有限公司 | Four-wheel driving power assembly of electric car |
| DE102014214331A1 (en) * | 2014-07-23 | 2016-01-28 | Schaeffler Technologies AG & Co. KG | planetary gear |
-
2018
- 2018-06-06 CN CN201810574268.4A patent/CN110566650A/en active Pending
-
2019
- 2019-06-06 DE DE102019115283.6A patent/DE102019115283A1/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003127682A (en) * | 2001-10-22 | 2003-05-08 | Fuji Heavy Ind Ltd | Vehicle drive unit |
| US20060063634A1 (en) * | 2003-12-05 | 2006-03-23 | Joseph Szuba | Differential mechanism for a vehicle and method of forming the same |
| JP2006349046A (en) * | 2005-06-15 | 2006-12-28 | Nissan Motor Co Ltd | Pinion support structure of planetary gear |
| CN101602326A (en) * | 2009-07-06 | 2009-12-16 | 奇瑞汽车股份有限公司 | A kind of differential retarder |
| DE102010032252A1 (en) * | 2010-07-26 | 2012-01-26 | Schaeffler Technologies Gmbh & Co. Kg | Gear box, has circular disk-shaped axial stops integrally formed with radial hollow component and radially projecting from hollow component, where hollow component is arranged between spigots and planetary carrier |
| CN201884620U (en) * | 2010-11-16 | 2011-06-29 | 浙江吉利汽车研究院有限公司 | Fixing structure of planetary gear shaft of differential gear |
| CN201985686U (en) * | 2011-05-04 | 2011-09-21 | 李领领 | Dual-output motor transmission integrated system |
| CN102582426A (en) * | 2012-03-30 | 2012-07-18 | 长城汽车股份有限公司 | Four-wheel driving power assembly of electric car |
| DE102014214331A1 (en) * | 2014-07-23 | 2016-01-28 | Schaeffler Technologies AG & Co. KG | planetary gear |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102019115283A1 (en) | 2019-12-12 |
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