CN112013095A - Fixing device and method for bolt fastening of differential shell and main reduction gear - Google Patents
Fixing device and method for bolt fastening of differential shell and main reduction gear Download PDFInfo
- Publication number
- CN112013095A CN112013095A CN202010945846.8A CN202010945846A CN112013095A CN 112013095 A CN112013095 A CN 112013095A CN 202010945846 A CN202010945846 A CN 202010945846A CN 112013095 A CN112013095 A CN 112013095A
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- Prior art keywords
- rack
- differential
- sheath
- fixing
- base
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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
- F16H48/00—Differential gearings
- F16H48/38—Constructional details
Abstract
The invention discloses a fixing device for a fastening bolt of a differential shell and a main reduction gear, which comprises a rack, a fixed base and a sheath, wherein the rack is fixedly arranged on the fixed base; the rack is provided with rack gear teeth matched with the tooth profile of the main reducer gear; the fixing base comprises a base and a supporting platform, wherein four bolt holes are uniformly distributed in the base, so that the fixing base can be conveniently fixed on a differential machine tool platform; the center of the base is provided with a central hole; the number of the supporting platforms is 2, and the supporting platforms are oppositely arranged on two sides of the base; the rack is arranged on the supporting platform; the sheath comprises a sheath inner ring and a sheath outer ring; the inner ring of the sheath is in clearance fit with a bearing journal section of the differential shaft assembly; the outer ring of the sheath is in clearance fit with the central hole of the fixed base, so that the radial fixation of the bearing of the differential shaft assembly is realized. In the fastening process, the main reducing gear does not have the deflection problem, and the uneven fastening torque of each fastening bolt is not caused.
Description
Technical Field
The invention belongs to the field of automobiles, and particularly relates to a fixing device and a fixing method for a fastening bolt of a differential shell and a main reduction gear.
Background
The automobile differential is an important part for realizing the torque transmission and the steering of the automobile. The differential shaft is generally a structure in which a differential shaft assembly and a main reduction gear are integrated by bolts. At present, the fastening bolts of the main reduction gear and the differential shell generally have two fixing modes: one is that a spline for locking the planet shaft is arranged for fixing and screwing, and the self-sealing differential mechanism is provided with a blanking cover at the end part, so that the spline shaft can not be locked with the planet shaft. The second is to fix the main reduction gear by means of diagonal fastening, and as shown in fig. 6 in detail, in the process of diagonal fastening of the main reduction gear and the fastening bolts of the differential case, the main reduction gear has a deflection problem, which easily causes uneven fastening torque of each fastening bolt, so that in the process of vehicle driving, the fastening bolts have the risk of loosening or even breaking, and great driving safety hidden trouble exists.
Therefore, a new device and method for fixing the fastening bolts of the differential case and the main reduction gear are urgently needed.
Disclosure of Invention
The invention aims to provide a fixing device and a fixing method for a fastening bolt of a differential case and a main reducing gear, wherein the main reducing gear is not inclined, and the uniformity of fastening torque of the fastening bolt of the main reducing gear and the differential case is improved.
The technical scheme adopted by the invention is as follows:
a fixing device for fastening bolts of a differential case and a main reduction gear comprises
The rack is used for fixing the main reducing gear; the rack gear teeth are matched with the tooth profile of the main reducing gear, so that the main reducing gear can be clamped conveniently;
a fixed base for fixing the rack and differential shaft assembly; the fixing device comprises a base and a supporting platform, wherein four bolt holes are uniformly distributed in the base, so that the fixing base can be conveniently fixed on a differential machine tool platform; a central hole is formed in the center of the base; the number of the supporting platforms is 2, and the supporting platforms are oppositely arranged on two sides of the base; the rack is arranged on the supporting platform;
a sheath for protecting a bearing journal section of the differential axle assembly; comprises a sheath inner ring and a sheath outer ring; the inner ring of the sheath is in clearance fit with a bearing journal section of the differential shaft assembly; the outer ring of the sheath is in clearance fit with the central hole of the fixed base; when the bearing fixing device is used, the sheath is sleeved on the bearing journal section of the differential shaft assembly, and then the sheath is inserted into the center hole of the fixing base, so that the radial fixing of the bearing of the differential shaft assembly is realized.
According to the scheme, the shape of the teeth of the rack gear is an involute or trapezoidal helical gear, so that the main reducing gear is convenient to clamp.
According to the scheme, the two kidney-shaped holes are formed in the rack, so that the distance between the rack and the main reduction gear of the differential shaft assembly can be conveniently adjusted to adapt to the main reduction gears with different diameters.
According to the scheme, the rack is made of a softer material, so that the tooth surface of the main reducer is prevented from being scratched.
According to the scheme, the rack is made of copper materials.
According to the scheme, the sheath is made of brass materials, so that the bearing journal section of the differential shaft assembly can be effectively protected from being scratched.
According to the scheme, 2 supporting platform bolt holes are formed in each supporting platform, and the rack fixing bolts sequentially penetrate through the racks and the supporting platforms and then fix the racks on the fixing base.
The invention also provides a method for fixing by adopting the fixing device of the fastening bolt of the differential shell and the main reduction gear, which comprises the following steps:
s1, fixing the fixing base on a differential machine tool platform through the threaded hole of the fixing base, placing the rack on a supporting platform, and fixing the rack gear teeth of the rack with the main reduction gear through the kidney-shaped hole and the rack fixing bolt;
s2, preliminarily screwing a differential shell of the differential shaft assembly and a main reduction gear through fixing bolts;
s3, arranging the sheath on a bearing journal section of the differential shaft assembly, arranging the differential shaft assembly on a fixed base, and enabling the outer wall of the outer ring of the sheath to be matched with a central hole of the fixed base to achieve radial fixation of the differential shaft assembly;
s4, tightening a fastening bolt between the main reduction gear and the differential shell in a diagonal fastening mode;
and S5, loosening the rack fixing bolt, moving the rack through the waist-shaped hole, and taking out the differential shaft assembly, thereby completing all the working procedures.
The invention has the beneficial effects that:
through setting up rack, fixed baseplate to make things convenient for fixed differential mechanism casing and main subtracting the gear, and make differential mechanism casing and main subtracting the gear and can not appear inclining in the connection process.
The gear shape of the rack and the gear shape of the main reducing gear are matched, so that when any bolt of the main reducing gear is fastened, namely any point of the main reducing gear is subjected to downward force, the main reducing gear and the rack are matched to be converted into downward force of the main reducing gear along the rack, the main reducing gear cannot incline when the bolt between the main reducing gear and the differential is screwed at any position by torque, the uniformity of the fastening torque of the fastening bolts of the main reducing gear and the differential is improved, and the risk that the fastening bolts of a vehicle are loosened or even fall off in the driving process is effectively reduced.
Simple structure and convenient realization.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic view of a differential case and a main reduction gear fastening bolt fastening device according to the present invention;
FIG. 2 is a schematic structural view of a support platform;
FIG. 3 is a schematic structural view of a differential axle assembly;
FIG. 4 is a schematic structural view of a rack;
FIG. 5 is a schematic view of the construction of the sheath;
FIG. 6 is a schematic view showing a bolt fastening sequence in a diagonal fastening manner;
FIG. 7 is a schematic view of the left hand side mounting of the ring gear of the differential axle assembly;
FIG. 8 is a cross-sectional view of the ring gear of the differential axle assembly shown in a left hand side;
FIG. 9 is a cross-sectional view of the ring gear of the differential axle assembly shown in a right-hand rotation.
Description of reference numerals:
1. differential shaft assembly, 11, differential casing, 12, main reducing gear, 13, differential blanking cover, 14, fastening bolt, 2, rack fixing bolt, 3, rack, 31, rack gear teeth, 32, kidney-shaped hole, 4, fixing base, 41, base, 42, center hole, 43, supporting platform threaded hole, 44, bolt hole, 45, supporting platform, 5, sheath, 51, sheath inner ring, 52 and sheath outer ring.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 3, the differential axle assembly 1 includes a differential case 11, a main reduction gear 12, a differential cover 13, and fastening bolts 14.
Referring to fig. 1 to 6, a fixing device of a fastening bolt of a differential case and a main reduction gear includes a rack 3, a fixing base 4, and a cover 5. The rack 3 is used for fixing the main reducing gear 12; it comprises rack gear teeth 31 and a kidney-shaped hole 32; the rack gear teeth 31 are matched with the tooth form of the main reducing gear 12 and are involute-shaped or trapezoidal helical gears, so that the main reducing gear 12 can be clamped conveniently; the rack 3 is fixed on the fixed base 4 through a rack fixing bolt 2; the distance between the rack 3 and the main reducing gear 12 of the differential shaft assembly is adjusted through the kidney-shaped hole 32 so as to adapt to the main reducing gears 12 with different diameters. The fixed base 4 is used for fixing the rack 3 and the differential shaft assembly 1; the fixing device comprises a base 41 and a supporting platform 45, wherein four bolt holes 44 are uniformly distributed in the base 41, so that the fixing base 4 can be conveniently fixed on a differential machine tool platform; the center of the base plate 41 is provided with a center hole 42, and the center hole 42 is used for fixing the differential shaft assembly 1; the number of the supporting platforms is 2, the supporting platforms are oppositely arranged on two sides of the base 41, 2 supporting platform bolt holes 43 are formed in the supporting platform 45, and the rack fixing bolts 22 sequentially penetrate through the rack 3 and the supporting platform 45 and then fix the rack 3 on the fixing base 4. The sheath 5 is used for protecting a bearing journal section of the differential shaft assembly 1; comprises a sheath inner ring 51 and a sheath outer ring 52; the inner ring 51 of the sheath is in clearance fit with the journal bearing section of the differential shaft assembly 1; the sheath outer ring 52 is in clearance fit with the central hole 42 of the fixed base 1; when the fixing device is used, the sheath 5 is sleeved on a bearing journal section of the differential shaft assembly 1, and then the sheath 5 is inserted into the center hole 42 of the fixing base 4, so that the radial fixing of the bearing of the differential shaft assembly 1 is realized.
In the present invention, the rack 3 is made of a softer material to prevent the tooth surface of the main reducing gear 12 from being scratched, and in a preferred embodiment, the rack 3 is made of a copper material. The sheath 5 is made of brass materials, and can effectively protect the bearing journal section of the differential shaft assembly 1 from being scratched.
A method for fixing by adopting the fixing device of the fastening bolt of the differential shell and the main reducing gear comprises the following steps:
s1, fixing the fixing base 1 on a differential machine tool platform through the bolt hole 44 of the fixing base 4, placing the rack 3 on a supporting platform 45, and fixing the rack gear teeth 31 of the rack 3 with the main reduction gear 12 through the kidney-shaped hole 32 and the rack fixing bolt 2;
s2, preliminarily screwing the differential case 11 and the main reduction gear 12 of the differential shaft assembly 1 through the fixing bolts 14;
s3, placing the sheath 5 on the bearing journal section of the differential shaft assembly 1, placing the differential shaft assembly 1 on the fixed base 4, and enabling the outer wall of the sheath outer ring 52 to be matched with the central hole 42 of the fixed base 1 to achieve radial fixing of the differential shaft assembly 1;
s4, tightening the fastening bolts 14 between the main reduction gear 12 and the differential case 11 in a diagonal fastening mode;
s5, loosening the rack fixing bolt 2, moving the rack 3 through the kidney-shaped hole 32, taking out the differential shaft assembly 1, and completing all the working procedures.
According to the invention, the rack matched with the tooth profile of the main reducing gear is designed to improve the uniformity of the fastening torque of the fastening bolt 14 between the main reducing gear 12 and the differential case 11 in the diagonal fastening process, so that the risk that the fastening bolt 14 between the main reducing gear 12 and the differential case 11 is loosened or even broken in the driving process of a vehicle is greatly reduced.
In the invention, the sheath has two specifications, and different sheath specifications are adopted for the left rotation and the right rotation of the main reduction gear ring gear. If the gear ring is rotated rightwards, the installation result is shown in figure 1; the dimensional results are shown in fig. 9: the outer diameter of the sheath is equal to the inner diameter D1 of the center hole 42 of the fixed base, the inner diameter of the sheath is equal to the bearing journal outer ring diameter D1, and the length of the sheath is equal to the distance L1 from the bearing retaining shoulder to the bottom of the fixed base 4. If the ring gear is left-handed, the installation result is as shown in FIG. 7; the dimensional results are shown in figure 8: the outer diameter of the sheath is equal to the inner diameter D2 of the center hole 42 of the fixed base, the inner diameter of the sheath is equal to the diameter D2 of the outer ring of the bearing journal, and the length of the sheath is equal to the distance L2 from the bearing retaining shoulder to the bottom of the fixed base 4.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.
Claims (10)
1. The utility model provides a differential mechanism casing and main fastening bolt's that subtracts gear fixing device which characterized in that: comprises that
The rack is used for fixing the main reducing gear; the gear teeth are matched with the tooth profile of the main reducing gear;
a fixed base for fixing the rack and differential shaft assembly; the fixing device comprises a base and a supporting platform, wherein four bolt holes are uniformly distributed in the base, so that the fixing base can be conveniently fixed on a differential machine tool platform; a central hole is formed in the center of the base; the number of the supporting platforms is 2, and the supporting platforms are oppositely arranged on two sides of the base; the rack is arranged on the supporting platform;
a sheath for protecting a bearing journal section of the differential axle assembly; comprises a sheath inner ring and a sheath outer ring; the inner ring of the sheath is in clearance fit with a bearing journal section of the differential shaft assembly; the outer ring of the sheath is in clearance fit with the central hole of the fixed base; when the bearing fixing device is used, the sheath is sleeved on the bearing journal section of the differential shaft assembly, and then the sheath is inserted into the center hole of the fixing base, so that the radial fixing of the bearing of the differential shaft assembly is realized.
2. The fixing device of a fastening bolt of a differential case and a main reduction gear according to claim 1, characterized in that: the shape of the teeth of the rack gear is an involute or trapezoidal helical gear, so that the main reducing gear can be clamped conveniently.
3. The fixing device of a fastening bolt of a differential case and a main reduction gear according to claim 1, characterized in that: two kidney-shaped holes are formed in the rack, so that the distance between the rack and a main reduction gear of the differential shaft assembly can be conveniently adjusted.
4. The fixing device of the fastening bolt of the differential case and the main reduction gear according to any one of claims 1 to 3, characterized in that: the rack is made of soft materials, and the tooth surface of the main reducing gear is prevented from being scratched.
5. The fixing device of a fastening bolt of a differential case and a main reduction gear according to claim 4, characterized in that: the rack is made of copper materials.
6. The fixing device of a fastening bolt of a differential case and a main reduction gear according to claim 1, characterized in that: the sheath is made of brass materials, and can effectively protect a bearing journal section of the differential shaft assembly from being scratched.
7. The fixing device of a fastening bolt of a differential case and a main reduction gear according to claim 1, characterized in that: each supporting platform is provided with 2 supporting platform bolt holes, and the rack fixing bolts sequentially penetrate through the racks and the supporting platforms and then fix the racks on the fixing base.
8. The fixing device of a fastening bolt of a differential case and a main reduction gear according to claim 1, characterized in that: the outer diameter of the sheath is equal to the inner diameter of the center hole of the fixed base, the inner diameter of the sheath is equal to the diameter of the outer ring of the bearing journal, and the length of the sheath is the distance from the bearing retaining shoulder to the bottom of the fixed base.
9. A method of fastening by using the fastening device of the fastening bolt of the differential case and the main reduction gear according to any one of claims 1 to 8, characterized in that:
s1, fixing the fixing base on a differential machine tool platform through the threaded hole of the fixing base, placing the rack on a supporting platform, and fixing the rack gear teeth of the rack with the main reduction gear through the kidney-shaped hole and the rack fixing bolt;
s2, preliminarily screwing a differential shell of the differential shaft assembly and a main reduction gear through fixing bolts;
s3, arranging the sheath on a bearing journal section of the differential shaft assembly, arranging the differential shaft assembly on a fixed base, and enabling the outer wall of the outer ring of the sheath to be matched with a central hole of the fixed base to achieve radial fixation of the differential shaft assembly;
s4, tightening a fastening bolt between the main reduction gear and the differential shell in a diagonal fastening mode;
and S5, loosening the rack fixing bolt, moving the rack through the waist-shaped hole, and taking out the differential shaft assembly, thereby completing all the working procedures.
10. The method of claim 9, wherein: different sheath specifications are adopted for the left rotation and the right rotation of the main reduction gear ring gear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010945846.8A CN112013095A (en) | 2020-09-10 | 2020-09-10 | Fixing device and method for bolt fastening of differential shell and main reduction gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010945846.8A CN112013095A (en) | 2020-09-10 | 2020-09-10 | Fixing device and method for bolt fastening of differential shell and main reduction gear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112013095A true CN112013095A (en) | 2020-12-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010945846.8A Pending CN112013095A (en) | 2020-09-10 | 2020-09-10 | Fixing device and method for bolt fastening of differential shell and main reduction gear |
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| Country | Link |
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| CN (1) | CN112013095A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112710423A (en) * | 2020-12-24 | 2021-04-27 | 东风汽车集团有限公司 | Method for measuring and evaluating clamping force of engine key bolt after test |
| CN115091193A (en) * | 2022-07-15 | 2022-09-23 | 盛瑞传动股份有限公司 | Differential assembly assembling method |
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| CN103008797A (en) * | 2012-12-07 | 2013-04-03 | 中冶陕压重工设备有限公司 | Tooth alignment clamp for ultra-long rack and positioning machining method for tooth alignment thereof |
| CN103742630A (en) * | 2013-12-19 | 2014-04-23 | 柳州上汽汽车变速器有限公司 | Differential mechanism base |
| CN204868056U (en) * | 2015-07-24 | 2015-12-16 | 广东明阳风电产业集团有限公司 | How synchronous bolt tightening mechanism of wind generating set main shaft and gear box hookup usefulness |
| CN206536260U (en) * | 2017-03-16 | 2017-10-03 | 重庆银翔摩托车制造有限公司 | A kind of split type differential carrier machining set-up |
| CN110682081A (en) * | 2019-10-18 | 2020-01-14 | 河南飞龙(芜湖)汽车零部件有限公司 | Small-size flange is hexagon bolt material loading erection equipment for part assembly |
| US10766106B2 (en) * | 2016-04-10 | 2020-09-08 | Toyota Motor Engineering & Manufacturing North America, Inc. | Drive shaft press |
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2020
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201606475U (en) * | 2009-12-23 | 2010-10-13 | 东莞宏威数码机械有限公司 | Rack driving side gap adjusting device |
| CN103008797A (en) * | 2012-12-07 | 2013-04-03 | 中冶陕压重工设备有限公司 | Tooth alignment clamp for ultra-long rack and positioning machining method for tooth alignment thereof |
| CN103742630A (en) * | 2013-12-19 | 2014-04-23 | 柳州上汽汽车变速器有限公司 | Differential mechanism base |
| CN204868056U (en) * | 2015-07-24 | 2015-12-16 | 广东明阳风电产业集团有限公司 | How synchronous bolt tightening mechanism of wind generating set main shaft and gear box hookup usefulness |
| US10766106B2 (en) * | 2016-04-10 | 2020-09-08 | Toyota Motor Engineering & Manufacturing North America, Inc. | Drive shaft press |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112710423A (en) * | 2020-12-24 | 2021-04-27 | 东风汽车集团有限公司 | Method for measuring and evaluating clamping force of engine key bolt after test |
| CN115091193A (en) * | 2022-07-15 | 2022-09-23 | 盛瑞传动股份有限公司 | Differential assembly assembling method |
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Application publication date: 20201201 |