CN111022614A - Main reducer assembly with improved transmission efficiency - Google Patents

Main reducer assembly with improved transmission efficiency Download PDF

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Publication number
CN111022614A
CN111022614A CN201911207058.2A CN201911207058A CN111022614A CN 111022614 A CN111022614 A CN 111022614A CN 201911207058 A CN201911207058 A CN 201911207058A CN 111022614 A CN111022614 A CN 111022614A
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CN
China
Prior art keywords
main
gear
bearing
assembly
cone
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
Application number
CN201911207058.2A
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Chinese (zh)
Inventor
尤家栋
林俊华
林旭华
覃作善
梁家添
邹华
冯熙敏
何宾
黄育荣
黄芝刚
甘晨
张武冠
明君剑
樊文问
宣晖
林子博
唐钼桢
张恒华
喻首华
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
FANGSHENG AXLE (LIUZHOU) CO LTD
Original Assignee
FANGSHENG AXLE (LIUZHOU) CO LTD
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by FANGSHENG AXLE (LIUZHOU) CO LTD filed Critical FANGSHENG AXLE (LIUZHOU) CO LTD
Priority to CN201911207058.2A priority Critical patent/CN111022614A/en
Publication of CN111022614A publication Critical patent/CN111022614A/en
Pending legal-status Critical Current

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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
    • F16H57/021—Shaft support structures, e.g. partition walls, bearing eyes, casing walls or covers with bearings
    • F16H57/022—Adjustment of gear shafts or bearings
    • 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
    • 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
    • F16H57/021—Shaft support structures, e.g. partition walls, bearing eyes, casing walls or covers with bearings
    • 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
    • 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
    • F16H57/029—Gearboxes; Mounting gearing therein characterised by means for sealing the gearboxes, e.g. to improve airtightness
    • 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
    • F16H57/038—Gearboxes for accommodating 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
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/0463—Grease lubrication; Drop-feed lubrication
    • 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
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/0467—Elements of gearings to be lubricated, cooled or heated
    • F16H57/0469—Bearings or seals
    • F16H57/0472—Seals
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H2057/02091—Measures for reducing weight of gearbox
    • 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
    • F16H57/021—Shaft support structures, e.g. partition walls, bearing eyes, casing walls or covers with bearings
    • F16H57/022—Adjustment of gear shafts or bearings
    • F16H2057/0221—Axial adjustment

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Details Of Gearings (AREA)

Abstract

A main speed reducer assembly for improving transmission efficiency relates to an axle part and comprises a main speed reducer shell and a main speed reducer positioned in the main speed reducer shell, wherein the main speed reducer comprises an input shaft, a flange, a driving cylindrical gear and an inter-axle differential assembly which are sequentially arranged on the input shaft, the driving cylindrical gear is meshed with a driven cylindrical gear, the driven cylindrical gear is arranged on a gear shaft of a driving conical gear, the driving conical gear is meshed with a driven conical gear, the front end of the input shaft is arranged on a bearing seat through a front bearing of the input shaft, the gear shaft of the driving conical gear is respectively arranged on the main speed reducer shell through an outer bearing of a large-cone-angle conical roller and an inner bearing of the large-cone-angle conical roller, and the cone angles of the outer bearing of the large-cone-angle conical roller and the inner bearing of the large-cone-angle conical roller are α -35 degrees.

Description

Main reducer assembly with improved transmission efficiency
Technical Field
The invention relates to an axle part, in particular to a main reducer assembly for improving transmission efficiency.
Background
Traditional well axle final drive assembly (as figure 3), part quantity is many, and weight is heavy, and the assembly process is complicated, and the reliability is low, and the main transmission efficiency that subtracts is low. In the next 5 years, with the further tightening of the limit value of the oil consumption in China, the trend that the engine reduces the rotating speed and adopts a direct gear is in the future. The speed ratio of about 2.57 required by future direct gears is predicted, the axle main reduction ratio design is extended to about 2.3, the reduction of the main reduction ratio can improve the transmission efficiency, the main reducer assembly with high transmission efficiency can improve the fuel economy, and the use cost of vehicles of users is reduced. The traditional intermediate axle main reducer assembly (as shown in fig. 3) is not suitable for the market, the existing market problems are increasingly obvious, and the following points are mainly included:
1. the bearing roller of the traditional main reducer assembly is unreasonable in design, the pretightening force of sealing elements such as an oil seal is large, the friction resistance is large when lubricating oil flows, and the transmission efficiency is low;
2. the traditional main reducer assembly has the advantages that the number of parts is large, the assembly process of each part is complex, the precision required by the mutual matching of the parts is high, the friction resistance of lubricating oil flowing among the parts is large, and the transmission efficiency is low;
3. the total weight of the traditional main reducer assembly is large due to the fact that the number of parts of the traditional main reducer assembly is large, the requirement for light weight of a product cannot be met, with the implementation of GB1589, the load limiting force of the country is increased, light weight becomes the development trend of the industry, particularly in a tractor, a user pursues high-efficiency transportation and low operation cost, and therefore a higher requirement needs to be provided for transmission efficiency;
4. along with the requirement of high-efficient transportation of the whole automobile, higher requirements are put forward on the performance and the reliability of the axle, and the reliability of the traditional middle axle main reducing assembly cannot meet the requirements.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the main reducer assembly with improved transmission efficiency is provided to overcome the defect that the traditional middle axle main reducer assembly cannot meet the market demand.
The technical scheme includes that the main reducer assembly capable of improving transmission efficiency comprises a main reducer shell and a main reducer located in the main reducer shell, the main reducer comprises an input shaft, a flange, a driving cylindrical gear and an inter-axle differential assembly, the flange, the driving cylindrical gear and the inter-axle differential assembly are sequentially mounted on the input shaft, the driving cylindrical gear is meshed with a driven cylindrical gear, the driven cylindrical gear is mounted on a gear shaft of a driving bevel gear, the driving bevel gear is meshed with a driven bevel gear, the front end of the input shaft is mounted on a bearing seat through a front bearing of the input shaft, the gear shaft of the driving bevel gear is mounted on the main reducer shell through an outer large-cone-angle conical roller bearing and an inner large-cone-angle conical roller bearing respectively, and the cone angles of the outer large-cone-angle conical roller bearing and the inner large-cone-angle conical roller bearing are α -.
The further technical scheme of the invention is as follows: an adjusting nut is further installed between the flange and the bearing seat, and a combined oil seal for sealing is installed between the adjusting nut and the flange.
The invention has the further technical scheme that: the combined oil seal comprises outer rubber, a main body framework, inner rubber, an inner end framework, a protective framework, a main self-tightening spring and an auxiliary self-tightening spring; the outer rubber is attached to the main body framework, the outer circular surface of the inner rubber is fused with the main body framework, the inner circular surface of the inner rubber is fused with the inner end framework, the protective framework is attached to the main body framework, the main self-tightening spring is installed on the inner rubber, and the auxiliary self-tightening spring is installed on the outer rubber; the inner side rubber is also provided with a main sealing lip ring and an oil return line, and lithium-based lubricating grease is injected into the main sealing lip ring; the outer side rubber is provided with an auxiliary sealing lip ring and a dustproof lip ring, and lithium-based lubricating grease is injected into the auxiliary sealing lip ring.
The further technical scheme of the invention is as follows: and the bearing seat is in direct contact connection with the end surface of the main speed reducer shell.
The invention has the further technical scheme that: the main reducer shell is of an integrated structure.
Due to the adoption of the structure, compared with the prior art, the main reducer assembly with improved transmission efficiency has the following beneficial effects:
1. can improve the transmission efficiency of the main reducer assembly
The gear shaft of the driving cone gear is arranged on a main speed reducer shell through a large cone angle conical roller outer bearing and a large cone angle conical roller inner bearing respectively, and the cone angles of the large cone angle conical roller outer bearing and the large cone angle conical roller inner bearing are α = 26-35 degrees.
In addition, the adjusting nut is further arranged between the flange and the bearing seat, the combined oil seal for sealing is arranged between the adjusting nut and the flange, the combined oil seal is an integrated low-friction combined oil seal, sealing can be achieved with a small compression ratio, leakage is small, friction resistance is small, the working position is stable, friction efficiency loss is reduced, and transmission efficiency of the main reducer assembly is further improved.
In addition, the main speed reducer shell is of an integrated structure, so that the main speed reducer shell can be lightened, and the number of components is reduced, so that the transmission efficiency of the main speed reducer assembly is further improved.
2. Improve the reliability of the product
The invention simplifies the assembly process design, reduces the number and the types of parts inside the main reducer, and improves the reliability of the product, for example, the service life of B10 can reach 150 kilometres.
3. Can improve the production efficiency
The bearing seat is in direct contact connection with the end face of the main speed reducer shell, an adjusting gasket between the bearing seat and the end face of the main speed reducer shell is omitted, the adjusting nut is directly adopted to adjust the bearing clearance, the bearing clearance adjusting process of the input end is optimized, and the production efficiency is effectively improved.
4. Product lightweight
The main reducer shell is of an integrated structure, so that the main reducer shell can be lightened, and the weight of a main reducer assembly is reduced by more than 20%.
5. Can meet the market demand
The invention adopts the tapered roller bearing with large taper angle and low friction resistance, the integrated combined oil seal with low friction resistance, the integrated main reducer shell, the light parts and high reliability, and can completely meet the requirements of the market on improving the fuel economy and reducing the use cost of vehicles.
The technical features of a final drive assembly for improving transmission efficiency according to the present invention will be further described with reference to the accompanying drawings and embodiments.
Drawings
FIG. 1: the invention relates to a structure schematic diagram of a main reducer assembly for improving transmission efficiency;
FIG. 2: embodiment one said structure schematic diagram of the combination oil seal;
FIG. 3: the structure schematic diagram of a traditional intermediate axle main speed reducer assembly;
in the above drawings, the reference numerals for the various parts are as follows:
1-an input shaft, 2-a flange,
3-combined oil seal, 31-outside rubber, 311-auxiliary sealing lip ring, 312-dustproof lip ring, 32-main body framework,
33-inner rubber, 331-main sealing lip ring, 332-oil return line, 34-inner end framework, 35-protective framework,
36-main self-tightening spring, 37-auxiliary self-tightening spring, 38-lithium grease,
4-adjusting nut, 5-input shaft front bearing, 6-inter-shaft meshing sleeve,
7-a bearing seat, 8-a driving cylindrical gear, 9-an interaxle differential assembly, 10-a rear half shaft gear,
11-an input shaft rear bearing, 12-a main reducer shell, 13-an end cover, 14-a large-cone-angle conical roller outer bearing,
15-driven cylindrical gear, 16-large taper angle tapered roller inner bearing, 17-driving bevel gear, 18-differential lock assembly,
19-passive bevel gear.
Detailed Description
The first embodiment is as follows:
a main reducer assembly for improving transmission efficiency comprises a main reducer shell 12 and a main reducer positioned in the main reducer shell 12, wherein the main reducer comprises an input shaft 1, a flange 2, an input shaft front bearing 5, an inter-shaft meshing sleeve 6, a driving cylindrical gear 8, an inter-shaft differential assembly 9 and a rear half-shaft gear 10, wherein the flange 2, the input shaft front bearing 5, the inter-shaft meshing sleeve 6, the driving cylindrical gear 8, the inter-shaft differential assembly 9 and the rear half-shaft gear 10 are sequentially arranged on the input;
the front end of the input shaft 1 is installed on the bearing seat 7 through the input shaft front bearing 5, install the adjusting nut 4 between flange 2 and bearing seat 7, and install the combined oil seal 3 used for sealing between adjusting nut 4 and flange 2, the combined oil seal 3 is the integrated low friction combined oil seal, it includes outside rubber 31, main body skeleton 32, inside rubber 33, inner end skeleton 34, protective skeleton 35, main self-tightening spring 36, vice self-tightening spring 37; the outer rubber 31 is attached to the main body framework 32, the outer circular surface of the inner rubber 33 is fused with the main body framework 32, the inner circular surface is fused with the inner end framework 34, the protective framework 35 is attached to the main body framework 32, the main self-tightening spring 36 is installed on the inner rubber 33, and the auxiliary self-tightening spring 37 is installed on the outer rubber 31; the inner rubber 33 is further provided with a main sealing lip ring 331 and an oil return line 332, and the main sealing lip ring 331 is injected with lithium grease 38; the outer rubber 31 is provided with a secondary seal lip ring 311 and a dust lip ring 312, and the secondary seal lip ring 311 is filled with lithium grease 38.
The end faces of the bearing seat 7 and the main speed reducer shell 12 are in direct contact connection, an adjusting gasket between the bearing seat 7 and the main speed reducer shell is omitted, the bearing clearance is adjusted directly by adopting an adjusting nut, and the bearing clearance adjusting process of the input end is optimized.
The inter-axle differential assembly 9 is respectively meshed with the driving cylindrical gear 8 and the rear half-axle gear 10, and the rear half-axle gear 10 is arranged on a main speed reducer shell 12 through an input shaft rear bearing 11; the main reducer casing 12 is an integrated structure.
The driving cylindrical gear 8 is meshed with the driven cylindrical gear 15, the driven cylindrical gear 15 is installed on a gear shaft 171 of the driving bevel gear 17, the driving bevel gear 17 is meshed with the driven bevel gear 19, the gear shaft 171 of the driving bevel gear 17 is installed on the main speed reducer shell 12 through a large-cone-angle conical roller outer bearing 14 and a large-cone-angle conical roller inner bearing 16 respectively, the cone angles α =30 degrees of the large-cone-angle conical roller outer bearing 14 and the large-cone-angle conical roller inner bearing 16, the driven bevel gear 19 is installed on the differential assembly 20, and the differential assembly 20 is further provided with a differential lock assembly 18.
As a variation of the first embodiment, the taper angle α of the large tapered roller outer bearing 14 and the large tapered roller inner bearing 16 may be any value between 26 degrees, 27 degrees, 28 degrees, 29 degrees, 31 degrees, 32 degrees, 33 degrees, 34 degrees, 35 degrees, or the like, and may be any value between 26 degrees and 35 degrees.

Claims (5)

1. A main reducer assembly for improving transmission efficiency comprises a main reducer shell (12) and a main reducer located in the main reducer shell (12), wherein the main reducer comprises an input shaft (1), a flange (2), a driving cylindrical gear (8) and an inter-axle differential assembly (9), the flange (2), the driving cylindrical gear (8) and the inter-axle differential assembly are sequentially installed on the input shaft (1), the driving cylindrical gear (8) is meshed with a driven cylindrical gear (15), the driven cylindrical gear (15) is installed on a gear shaft (171) of a driving bevel gear (17), the driving bevel gear (17) is meshed with a driven bevel gear (19), the front end of the input shaft (1) is installed on a bearing seat (7) through an input shaft front bearing (5), and the main reducer assembly is characterized in that a gear shaft (171) of the driving bevel gear (17) is respectively installed on the main reducer shell (12) through a large-cone-angle tapered roller outer bearing (14) and a large-cone-angle tapered roller inner bearing (16), and the large-angle tapered roller outer bearing (14) and the large-tapered roller inner bearing (16) have cone angles of α.
2. A final drive assembly for improved drive efficiency according to claim 1, wherein: an adjusting nut (4) is further installed between the flange (2) and the bearing seat (7), and a combined oil seal (3) for sealing is installed between the adjusting nut (4) and the flange (2).
3. A final drive assembly for improved drive efficiency according to claim 2, wherein: the combined oil seal (3) comprises outer rubber (31), a main body framework (32), inner rubber (33), an inner end framework (34), a protective framework (35), a main self-tightening spring (36) and an auxiliary self-tightening spring (37); the outer rubber (31) is attached to the main body framework (32), the outer circle surface of the inner rubber (33) is fused with the main body framework (32), the inner circle surface of the inner rubber (33) is fused with the inner end framework (34), the protective framework (35) is attached to the main body framework (32), the main self-tightening spring (36) is installed on the inner rubber (33), and the auxiliary self-tightening spring (37) is installed on the outer rubber (31); a main sealing lip ring (331) and an oil return line (332) are further designed on the inner rubber (33), and lithium-based lubricating grease (38) is injected into the main sealing lip ring (331); an auxiliary sealing lip ring (311) and a dustproof lip ring (312) are designed on the outer rubber (31), and lithium-based lubricating grease (38) is injected into the auxiliary sealing lip ring (311).
4. A final drive assembly for improved drive efficiency according to claim 1, wherein: the bearing seat (7) is in direct contact connection with the end face of the main speed reducer shell (12).
5. A final drive assembly for improved drive efficiency according to claim 1 or 2 or 3 or 4 wherein: the main reducer shell (12) is of an integrated structure.
CN201911207058.2A 2019-11-29 2019-11-29 Main reducer assembly with improved transmission efficiency Pending CN111022614A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911207058.2A CN111022614A (en) 2019-11-29 2019-11-29 Main reducer assembly with improved transmission efficiency

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911207058.2A CN111022614A (en) 2019-11-29 2019-11-29 Main reducer assembly with improved transmission efficiency

Publications (1)

Publication Number Publication Date
CN111022614A true CN111022614A (en) 2020-04-17

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ID=70207289

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201911207058.2A Pending CN111022614A (en) 2019-11-29 2019-11-29 Main reducer assembly with improved transmission efficiency

Country Status (1)

Country Link
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114872494A (en) * 2022-06-02 2022-08-09 山东蓬翔汽车有限公司 Heavy truck drive axle structure assembly with high transmission efficiency
CN114872494B (en) * 2022-06-02 2024-06-04 山东蓬翔汽车有限公司 High-transmission-efficiency heavy truck driving axle structure assembly

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114872494A (en) * 2022-06-02 2022-08-09 山东蓬翔汽车有限公司 Heavy truck drive axle structure assembly with high transmission efficiency
CN114872494B (en) * 2022-06-02 2024-06-04 山东蓬翔汽车有限公司 High-transmission-efficiency heavy truck driving axle structure assembly

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