CN102774240A - Rear drive axle assembly - Google Patents
Rear drive axle assembly Download PDFInfo
- Publication number
- CN102774240A CN102774240A CN2012102833171A CN201210283317A CN102774240A CN 102774240 A CN102774240 A CN 102774240A CN 2012102833171 A CN2012102833171 A CN 2012102833171A CN 201210283317 A CN201210283317 A CN 201210283317A CN 102774240 A CN102774240 A CN 102774240A
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- 230000009467 reduction Effects 0.000 claims abstract description 51
- 230000007246 mechanism Effects 0.000 abstract description 6
- 238000009434 installation Methods 0.000 abstract description 4
- 230000005855 radiation Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract 1
- 238000010276 construction Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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Abstract
The invention discloses a rear drive axle assembly. The rear drive axle assembly comprises an axle casing which is in a girder structure, two wheel hubs, a main reducing gear and differential mechanism assembly, a braking assembly, a hub reduction gear, a forced differential lock and a parking brake, wherein the forced differential lock comprises a sliding meshing sleeve, a differential mechanism lockpin, a piston, a selector rod, a back-moving spring and a shifting fork, the shifting fork is connected fixedly with a shifting fork shaft, the back-moving spring is arranged between the shifting fork and the shifting fork shaft, a groove which is matched with the shifting fork is arranged on the sliding meshing sleeve, grooves which are matched with the differential mechanism lockpin are arranged on the sliding meshing sleeve and a driving shaft gear of the main reducing gear and differential mechanism assembly correspondingly, the parking brake comprises a brake body and a brake disk, the brake body is arranged on a main reducing gear casing of the main reducing gear and differential mechanism assembly, the brake disk is arranged on a main tooth flange, and a plane and an installation hole, which are connected with the machine base plate, are arranged on the axle casing. The rear drive axle assembly has the advantages of being good in parking and heat radiation performance, large in bearing capacity, simple in structure and convenient to process and produce.
Description
Technical field
The present invention relates to a kind of rear driving axle assembly.
Background technology
Along with the lasting propelling of national urbanization construction and capital construction, the producing and selling of construction machinery and equipment, field machine there is tangible promotion, particularly the volume of production and marketing of large-tonnage backhoe loader and large tractor rises obviously.Simultaneously, the technical design level of field machines such as construction machinery and equipment, trac., manufacturing process etc. have all had significant raising, adopt the type of four wheel drive form more and more general.Capability and performance to complete machine has also proposed higher demand simultaneously.
Construction machinery and equipment, farm machinery be because of work under bad environment, and stability of the reliability and the crossing ability of complete machine, the leak tightness that comprises drive axle, deceleration and stopping performance etc. is all had higher requirements.Adopt the type of four wheel drive to become trend.
The total bridge of existing rear drive, mostly fault rate is higher, the crossing ability deviation, is difficult to satisfy requirement of client qualitatively.
Summary of the invention
The purpose of this invention is to provide a kind of Parking performance good, can conveniently force to carry out left and right sides two-wheeled driven in synchronism and rear driving axle assembly simple in structure.
For addressing the above problem, technical scheme of the present invention is:
A kind of rear driving axle assembly comprises the axle housing of girder structure, two wheel hubs, main reduction gear band differential assembly, brake assembly and wheel reduction gears; Two wheel hubs are arranged on the right ends of axle housing; The arranged outside wheel reduction gear of wheel hub; Main reduction gear band differential assembly is installed at said axle housing middle part; Main reduction gear band differential assembly both sides are provided with brake assembly, and an axle drive shaft that is rotationally connected with brake assembly and main reduction gear band differential assembly is respectively established in the both sides of said brake assembly, and drive shaft turns connects the wheel reduction gear at axle housing two ends; Also comprise and force differential locking-device and Parking Brake;
Said pressure differential locking-device comprises sliding engaged cover, diff lock pin, piston, declutch shift shaft, retracing spring and shift fork; Said shift fork is captiveed joint with declutch shift shaft; Between shift fork and the piston retracing spring is set; Sliding engaged puts and is provided with the groove that cooperates with shift fork, and the sliding engaged cover can axially move under the drive of shift fork, and sliding engaged is overlapped the groove that matches with the diff bearing pin with the cooresponding setting of axle-shaft gear of main reduction gear band differential assembly;
Said Parking Brake comprises drg body and brake disc, and said drg body is arranged on the final drive casing of main reduction gear band differential assembly, and brake disc is arranged on the flange of cardinal tooth;
Said axle housing is provided with plane and the mounting hole that is connected with the complete machine chassis.
As further improvement of the present invention, said axle housing section is " mouth " font cavity structure, and its front-back is provided with reinforced rib, and said axle drive shaft connects the main reduction gear band differential assembly and the wheel reduction gear at two ends through " mouth " font cavity.
Further improve as of the present invention, said axle housing inblock cast forms.
The invention has the beneficial effects as follows: force differential locking-device when mire or other complicated road surfaces need the left and right wheels driven in synchronism, can force to carry out left and right sides two-wheeled driven in synchronism.Parking Brake is arranged on the car back axle as drive axle, can carry out actv. to vehicle and slow down, stops, and has improved the effect of Parking.Plane and the mounting hole be connected with the complete machine chassis are set on the axle housing, make that back axle and complete machine can direct connections, and need not to be provided with in addition the connection structure of complicacy, simplified the structure of whole back axle.
Section is the integrated carrying ability that the axle housing of " mouth " font cavity structure has increased vehicle bridge, and the dissipating area that the reinforced rib on the axle housing not only helps to improve whole bridge bearing load but also increased axle housing helps the heat radiation of axle housing.
The axle housing that inblock cast forms not only can guarantee the requirement of dimensional accuracy, and simultaneously with low cost, comprehensive economic performance is good.
In sum, rear driving axle assembly of the present invention Parking and perfect heat-dissipating, load-carrying capacity is big, and simple in structure, makes things convenient for processing and manufacturing.
Figure of description
Fig. 1 is the structural representation of rear driving axle assembly of the present invention.
Fig. 2 is that the A of Fig. 1 is to view.
Fig. 3 is that the P of Fig. 1 is to view.
Fig. 4 is the section structure scheme drawing of rear driving axle assembly axle housing of the present invention.
Fig. 5 is the scheme drawing of rear driving axle assembly master deceleration strip differential assembly of the present invention.
The specific embodiment
Do further explanation below in conjunction with the accompanying drawing specific embodiments of the invention.
To rear driving axle assembly shown in Figure 5, comprise the axle housing 4 of girder structure, two wheel hubs 8, main reduction gear band differential assembly 1, brake assembly 2 and wheel reduction gears like Fig. 1; Two wheel hubs 8 are arranged on the right ends of axle housing 4 through wheel hub inside and outside circle taper roller bearing 9; The arranged outside wheel reduction gear of wheel hub 8; Said axle housing 4 middle parts are provided with main reduction gear band differential assembly 1; Main reduction gear band differential assembly 1 both sides are provided with brake assembly 2, and an axle drive shaft 6 that is rotationally connected with brake assembly 2 and main reduction gear band differential assembly 1 is respectively established in the both sides of said brake assembly, the be rotationally connected wheel reduction gear at axle housing 4 two ends of axle drive shaft 6; Said axle housing 4 inblock casts form; Section is " mouth " font cavity structure, and reinforced rib 44 is set on its front-back, and said axle drive shaft 6 connects the main reduction gear band differential assembly 1 and the wheel reduction gear at two ends through " mouth " font cavity.The above and below of axle housing 4 is plane 45, and is provided with the mounting hole 43 that is connected with the complete machine chassis, make axle housing 4 can with the complete machine direct connection together.
Foregoing wheel reduction gear comprises wheel reduction gear shell 22, planetary wheel 23 and planet wheel spindle 24, the sun wheel shaft 25 that is installed on the wheel hub 8; Sun wheel shaft 25 is provided with spline; Wheel reduction gear shell 22 inner chambers are provided with the gear ring 27 that is supported by gear ring support 26; Said planetary wheel 23 is installed on the planet wheel spindle 24 through needle roller 28; And with gear ring 27 and sun wheel shaft 25 engagements, planet wheel spindle 24 is installed through interference fit with wheel reduction gear shell 22, between planet wheel spindle 24 and wheel reduction gear shell 22 installation positions, is provided with lock ball 29 to prevent between planet wheel spindle 24 and the wheel reduction gear shell 22 mutual displacement taking place in use.Described axle drive shaft 6 is connected with sun wheel shaft 25 through shift sleeve 7, and moment of torsion is sent to wheel hub 8.
Aforesaid brake assembly 2 comprises arrester shell 13, brake plate 12, friction lining 11, brake piston 40, brake wheel 41, retracing spring group 42; Wherein brake plate 12 and friction lining 11 are that annulus mechanism, brake plate 12 cylindricals have spline, friction lining 11 endoporus have spline; Brake plate 12 is installed with friction lining 11 at interval; Brake plate 12 through spline be fixed on the arrester shell 13 (having matching spline on the circle in the arrester shell 13), friction lining 11 is fixed on the brake wheel 41 through the endoporus spline; Brake wheel 41 endoporus have the spline that matches with axle drive shaft 6, and are installed on the axle drive shaft 6; Brake piston 41 is installed in the arrester shell 13 and can produces relative displacement with arrester shell 13.Glancing impact: hydraulic oil promotes brake piston 41 and moves to main reduction gear band differential assembly 1 direction under pressure, and brake piston 41 promotes brake plate 12, brake plate 12 promotes 11 and moves to successively and can not move.Because of brake plate 12 is tumbler (rotating speed is consistent with axle drive shaft 6 rotating speeds) for connecting element, friction lining 11; Produce rotation each other at braking 12 and friction lining 11, produce heat, consume the complete machine brake efficiency; Thereby realization braking function.During brake off, hydraulic oil fluid power disappears, and brake piston 41 moves to initial position under the spring thrust of pull back spring group 42, and brake plate 12 is thrown off with friction lining 11, and lock torque disappears.
Front said main reduction gear band differential assembly 1 comprise the taper driving gear 14 that is used to change moment of torsion and with its ingear ring gear 15, four planetary wheels 16 and the axle-shaft gear 17 that is meshed with four planetary wheels 16; Taper driving gear 14 is installed on the final drive casing 10 through outer bearing 18 in the main tooth; Final drive casing 10 is independent sealing cast structure; Integral body is cylinder-like structure, and said final drive casing 10 is arranged on the housing of arrester shell 13, and aforesaid brake assembly 2 is installed on the axle housing 4; Four planetary wheels 16 are uniformly distributed with by two compensating-gear shaft 19 symmetries and are installed on the differential gear box 20; Differential gear box 20 is fixed on the arrester shell 13 through differential bearing 21, and two axle-shaft gears 17 are installed in the differential gear box 20, and there is spline axle-shaft gear 17 inside; Axle drive shaft 6 is provided with the spline that cooperates with axle-shaft gear 17 near an end of main reduction gear band differential assembly 1; Differential bearing 21 outer rings are installed on the arrester shell 13, and inner ring is installed on the differential gear box 20, realize that differential gear box 20 relative final drive casings 10 rotate; Driven wheel 17 is meshed with differential gear box 20 interior planetary gears 16; Ring gear 15 is installed on the differential gear box 20 through bolt, and the moment of torsion on the taper driving gear is passed to the axle drive shaft 6 of both sides and realizes differential function.This main reduction gear band differential assembly is not to be contained in the axle housing; But with the parallel assembling of axle housing 4; Final drive casing 10 housings wherein are as the part of rear driving axle assembly supporting, and this structure has effectively increased the ground Clearance of rear driving axle assembly centre portion, makes the crossing ability of complete machine better; Also simplified simultaneously the structure of axle housing 4, made axle housing be easy to processing, make.
Rear driving axle assembly of the present invention also comprises forces differential locking-device 5 and Parking Brake 3, described pressure differential locking-device 5 to comprise parts compositions such as sliding engaged cover 33, diff lock pin 34, piston 35, declutch shift shaft 36, retracing spring 37 and shift fork 38.Wherein the structure of diff lock pin 34 is that two ends are the ball-shaped straight pin; Be installed in the differential gear box 20; Near driven wheel 17 (the driven wheel cylindrical is processed with the groove that matches with sphere), sliding engaged cover 33 can axially move by differential gear box 20 in the drive lower edge of shift fork 38 one end sphere near sliding engaged cover 33, one end.During the car load cruising, all parts all are in initial installation site, force differential locking-device 5 inoperative.When needs use to be forced differential locking-device 5, piston 35 under the effect of oil pressure piston cylinder 39 in promotion declutch shift shaft 36 inwardly move, because of shift fork 38 is fixed on the declutch shift shaft 36; Shift fork 38 moves inward synchronously; Drive sliding engaged cover 33 and inwardly slide, shift sleeve 33 promotes differential lock pin 34 end spheres, and differential lock pin 34 is fixedly mounted in the hole of differential gear box 20; Can not axially move, differential lock pin 34 can only vertically move along the mounting hole line of centers under the promotion of shift sleeve 33; The other end sphere of differential lock pin 34 falls in the groove that matches of driven wheel 17, forces to make the driven wheel 17 can not rotation, thereby removes the differential function of diff; Make planetary wheel 16, driven wheel 17 form a unitary rotation with differential gear box 20, and then complete machine both sides wheel is rotated synchronously.
When removing differential locking-device: hydraulic fluid pressure disappears in the piston cylinder; Piston 35 drives shift fork 38 and returns to initial installation site with sliding engaged cover 33 under the thrust of retracing spring 37; The pressure of 33 pairs of differential lock pins 34 of sliding engaged cover disappears; When driven wheel 17 rotates at this moment, can promote differential lock pin 34 and outwards move, make main reduction gear band differential assembly 1 recover differential function along the mounting hole line of centers.
Described Parking Brake 3 is disc type Parking Brakes, and it comprises drg body 30 and brake disc 31, and said drg body 30 is arranged on the final drive casing 10 of main reduction gear band differential assembly 1, and brake disc 31 is arranged on the flange of cardinal tooth 32.
Taper driving gear 14 right sides are provided with the ring gear 15 that is meshed with taper driving gear 14; Taper driving gear 14 drives ring gear 15 and rotates with differential gear box 20 when rotating; And moment of torsion passed to the axle drive shaft 6 of and arranged on left and right sides; Because taper driving gear 14 is different with the number of teeth of ring gear 15, thereby realize the reduction of rotating speed, increase output torque simultaneously.Axle drive shaft 6 is steady with power through shift sleeve 7, failure-free is passed to sun wheel shaft 25; Wheel reduction gear by three planet wheel spindles 24 with three planetary wheels 23 be fixed on sun wheel shaft 25 around; Sun wheel shaft 25 is positioned at the middle part of three planetary wheels 23; Three planetary wheels 23 are meshed with sun wheel shaft 25, and sun wheel shaft 25 drives planetary wheel 23 and rotates, and planetary wheel 23 has the trend that gear ring 27 rotates that drives; But gear ring 27 is installed on the gear ring support 26; Gear ring support 26 is installed on the axle housing 4 through screw and in fact can not rotates for connecting element, so can only be that sun wheel shaft 25 is being with 22 revolution of wheel reduction gear shell in rotation, wheel reduction gear 22 shells drive wheel hub 8 and realize vehicle to overtake.Because sun wheel shaft 25 is different with the number of teeth of planetary wheel 23, thereby reduce the second time of realizing rotating speed.The structure of double reduction can to dwindle the assembly oad when the complete machine output torque requires little satisfying, the contour dimension of main gearbox assembly particularly, and element size reduces the corresponding reduction of weight, indirect reduction oil consumption simultaneously.
Claims (3)
1. rear driving axle assembly comprises axle housing (4), two wheel hubs (8), main reduction gear band differential assembly (1), brake assembly (2) and the wheel reduction gear of girder structure; Two wheel hubs (8) are arranged on the right ends of axle housing (4); The arranged outside wheel reduction gear of wheel hub (8); Main reduction gear band differential assembly (1) is installed at said axle housing (4) middle part; Main reduction gear band differential assembly (1) both sides are provided with brake assembly (2); An axle drive shaft (6) that is rotationally connected with brake assembly (2) and main reduction gear band differential assembly (1) is respectively established in the both sides of said brake assembly, the be rotationally connected wheel reduction gear at axle housing (4) two ends of axle drive shaft (6);
It is characterized in that: also comprise and force differential locking-device (5) and Parking Brake (3);
Said pressure differential locking-device (5) comprises sliding engaged cover (33), diff lock pin (34), piston (35), declutch shift shaft (36), retracing spring (37) and shift fork (38); Said shift fork (38) is captiveed joint with declutch shift shaft (36); Between shift fork (38) and the piston (35) retracing spring (37) is set; Sliding engaged cover (33) is provided with the groove that cooperates with shift fork (38); Sliding engaged cover (33) can axially move under the drive of shift fork (38), sliding engaged cover (33) and the cooresponding groove that matches with diff bearing pin (34) that is provided with of the axle-shaft gear (17) of main reduction gear band differential assembly (1);
Said Parking Brake (3) comprises drg body (30) and brake disc (31); Said drg body (30) is arranged on the final drive casing (10) of main reduction gear band differential assembly (1), and brake disc (31) is arranged on the flange of cardinal tooth (32);
Said axle housing (4) is provided with plane (45) and the mounting hole (43) that is connected with the complete machine chassis.
2. rear driving axle assembly according to claim 1; It is characterized in that: said axle housing (4) section is " mouth " font cavity structure; Its front-back is provided with reinforced rib (44), and said axle drive shaft (6) connects the main reduction gear band differential assembly (1) and the wheel reduction gear at two ends through " mouth " font cavity.
3. rear driving axle assembly according to claim 2 is characterized in that: said axle housing (1) inblock cast forms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210283317.1A CN102774240B (en) | 2012-08-09 | 2012-08-09 | Rear drive axle assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210283317.1A CN102774240B (en) | 2012-08-09 | 2012-08-09 | Rear drive axle assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102774240A true CN102774240A (en) | 2012-11-14 |
| CN102774240B CN102774240B (en) | 2014-01-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210283317.1A Active CN102774240B (en) | 2012-08-09 | 2012-08-09 | Rear drive axle assembly |
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| CN (1) | CN102774240B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103253082A (en) * | 2013-02-04 | 2013-08-21 | 三一汽车制造有限公司 | Drive axle and engineering machine |
| CN104669935A (en) * | 2013-11-26 | 2015-06-03 | 陕西汉德车桥有限公司 | Automobile steering drive axle |
| CN105980223A (en) * | 2013-09-23 | 2016-09-28 | 夸德罗车辆公司 | Parking brake |
| CN106945459A (en) * | 2015-10-22 | 2017-07-14 | 凯斯勒公司 | Wheel hub structure for two-wheel |
| CN109130844A (en) * | 2018-09-11 | 2019-01-04 | 杜德术 | A kind of automobile multifunctional drive axle |
| CN111251782A (en) * | 2020-03-23 | 2020-06-09 | 泰安九洲金城机械有限公司 | Super-high-horsepower split type drive axle and machining and connecting method thereof |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102017110942A1 (en) * | 2017-05-19 | 2018-11-22 | Lucas Automotive Gmbh | Parking brake system for a motor vehicle and motor vehicle |
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| US20090145683A1 (en) * | 2007-12-07 | 2009-06-11 | Szczepanski Gerald S | Adjusting and Maintaining Bearing Preload in an Axle Assembly |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103253082A (en) * | 2013-02-04 | 2013-08-21 | 三一汽车制造有限公司 | Drive axle and engineering machine |
| CN105980223A (en) * | 2013-09-23 | 2016-09-28 | 夸德罗车辆公司 | Parking brake |
| CN105980223B (en) * | 2013-09-23 | 2019-06-14 | 夸德罗车辆公司 | Parking brake |
| CN104669935A (en) * | 2013-11-26 | 2015-06-03 | 陕西汉德车桥有限公司 | Automobile steering drive axle |
| CN106945459A (en) * | 2015-10-22 | 2017-07-14 | 凯斯勒公司 | Wheel hub structure for two-wheel |
| CN109130844A (en) * | 2018-09-11 | 2019-01-04 | 杜德术 | A kind of automobile multifunctional drive axle |
| CN111251782A (en) * | 2020-03-23 | 2020-06-09 | 泰安九洲金城机械有限公司 | Super-high-horsepower split type drive axle and machining and connecting method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102774240B (en) | 2014-01-29 |
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Effective date of registration: 20240625 Address after: No. 5 Zhongxing East Road, Economic Development Zone, Lishui District, Nanjing City, Jiangsu Province, 211200 Patentee after: Nanjing Xida Investment Co.,Ltd. Country or region after: China Address before: 211200 No.5, Zhongxing East Road, Lishui Economic Development Zone, Nanjing, Jiangsu Province Patentee before: NANJING CV-HS AUTOPARTS Co.,Ltd. Country or region before: China |