CN202703132U - Rear drive axle assembly - Google Patents
Rear drive axle assembly Download PDFInfo
- Publication number
- CN202703132U CN202703132U CN 201220394350 CN201220394350U CN202703132U CN 202703132 U CN202703132 U CN 202703132U CN 201220394350 CN201220394350 CN 201220394350 CN 201220394350 U CN201220394350 U CN 201220394350U CN 202703132 U CN202703132 U CN 202703132U
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- Prior art keywords
- assembly
- reduction gear
- brake
- shift fork
- axle
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- Withdrawn - After Issue
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Abstract
The utility model discloses a rear drive axle assembly which comprises an axle shell which is in beam structure, two hubs, a main reducer with a belt differential assembly, a brake assembly, a wheel reducer, a forcing differential lock and a parking brake, wherein the forcing differential lock comprises a sliding engaged sleeve, a differential lock pin, a piston, a shift fork shaft, a reset spring and a shift fork. The shift fork is fixedly connected with the shift fork shaft, and the reset spring is arranged between the shift fork and the shift fork shaft. The sliding engaged sleeve is provided with a groove matched with the shift fork, and drive shaft gears of the sliding engaged sleeve and the main reducer belt differential assembly are correspondingly provided with grooves matched with differential pin shafts. The parking brake comprises a brake body and a brake disc, wherein the brake body is arranged on a shell of a main reducer of the main reducer belt differential assembly. The brake disc is arranged on a main tooth flange, and flat faces and mounting holes connected with a chassis of a whole machine are arranged on the axle shell. The rear drive axle assembly has the advantages of being good in parking performance and heat dissipation performance, large in bearing capacity, simple in structure, and convenient to manufacture.
Description
Technical field
The utility model 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 obvious promotion, particularly the volume of production and marketing of large-tonnage backhoe loader and large tractor rises obviously.Simultaneously, the technical design level of the 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.Simultaneously higher demand has been proposed also the capability and performance of complete machine.
Construction machinery and equipment, farm machinery be because of work under bad environment, and stability of 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 client's requirement qualitatively.
Summary of the invention
The purpose of this utility model 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, the technical solution of the utility model 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 two ends, the left and right sides of axle housing, the arranged outside wheel reduction gear of wheel hub, main reduction gear band differential assembly is installed at described axle housing middle part, main reduction gear band differential assembly both sides are provided with brake assembly, 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 described 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;
Described pressure differential locking-device comprises slip engaging sleeve, diff lock pin, piston, declutch shift shaft, retracing spring and shift fork, described shift fork is captiveed joint with declutch shift shaft, between shift fork and the piston retracing spring is set, the slip engaging sleeve is provided with the groove that cooperates with shift fork, the slip engaging sleeve can axially move under the drive of shift fork, the groove that the setting that the slip engaging sleeve is corresponding with the axle-shaft gear of main reduction gear band differential assembly matches with the diff bearing pin;
Described Parking Brake comprises drg body and brake disc, and described 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;
Described axle housing is provided with plane and the mounting hole that is connected with the complete machine chassis.
As further improvement of the utility model, described axle housing section is " mouth " font cavity structure, and its front-back arranges reinforced rib, and described axle drive shaft connects main reduction gear band differential assembly and the wheel reduction gear at two ends by " mouth " font cavity.
Further improve as of the present utility model, described axle housing inblock cast forms.
The beneficial effects of the utility model are: when forcing differential locking-device to need the left and right wheels driven in synchronism on muddy or other complicated road surfaces, 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 that is connected with the complete machine chassis is set on the axle housing, directly connects so that back axle is connected with complete machine, and need not to arrange in addition complicated connection structure, 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 is conducive to 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, the assembly Parking of the utility model rear driving axle and perfect heat-dissipating, load-carrying capacity is large, and simple in structure, makes things convenient for processing and manufacturing.
Description of drawings
Fig. 1 is the structural representation of the utility model rear driving axle assembly.
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 the utility model rear driving axle assembly axle housing.
Fig. 5 is the scheme drawing of the utility model rear driving axle assembly master deceleration strip differential assembly.
The specific embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present utility model is described further.
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 such as Fig. 1; Two wheel hubs 8 are arranged on the two ends, the left and right sides of axle housing 4 by wheel hub inside and outside circle taper roller bearing 9, the arranged outside wheel reduction gear of wheel hub 8, described axle housing 4 middle parts arrange main reduction gear band differential assembly 1, main reduction gear band differential assembly 1 both sides arrange 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 described brake assembly, axle drive shaft 6 is rotationally connected the wheel reduction gear at axle housing 4 two ends, described axle housing 4 inblock casts form, section is " mouth " font cavity structure, reinforced rib 44 is set on its front-back, and described axle drive shaft 6 connects main reduction gear band differential assembly 1 and the wheel reduction gear at two ends by " 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, and axle housing 4 can directly be linked together with complete machine.
Foregoing wheel reduction gear comprises the hub reducer casing 22 that is installed on the wheel hub 8, planetary wheel 23 and planet wheel spindle 24, sun wheel shaft 25, sun wheel shaft 25 is provided with spline, hub reducer casing 22 inner chambers are provided with the gear ring 27 that is supported by gear ring support 26, described planetary wheel 23 is installed on the planet wheel spindle 24 by needle roller 28, and with 25 engagements of gear ring 27 and sun wheel shaft, planet wheel spindle 24 is installed by interference fit with hub reducer casing 22, is provided with lock ball 29 to prevent between planet wheel spindle 24 and the hub reducer casing 22 mutual displacement occuring in use between planet wheel spindle 24 and hub reducer casing 22 installation positions.Described axle drive shaft 6 is connected with sun wheel shaft 25 by engaging 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 be annulus mechanism, brake plate 12 cylindricals with spline, friction lining 11 endoporus with spline; Install at brake plate 12 and friction lining 11 intervals, brake plate 12 by spline be fixed on the arrester shell 13 (on arrester shell 13 inner circles with matching spline), friction lining 11 is fixed on the brake wheel 41 by 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.During braking: 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 brake plate 12 is tumbler (rotating speed is consistent with axle drive shaft 6 rotating speeds) for connecting element, friction lining 11; Produce mutually rotation 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 for the taper driving gear 14 that changes moment of torsion and with the ring gear 15 of its engagement, 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 by outer bearing 18 in the main tooth, final drive casing 10 is independent sealing cast structure, integral body is cylinder-like structure, described final drive casing 10 is arranged on the housing of arrester shell 13, aforesaid brake assembly 2 is installed on the axle housing 4, four planetary wheels 16 are by two compensating-gear shafts, 19 symmetrical uniform being installed on the differential gear box 20, differential gear box 20 is fixed on the arrester shell 13 by differential bearing 21, two axle-shaft gears 17 are installed in the differential gear box 20, 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, inner ring is installed on the differential gear box 20, realizes that differential gear box 20 rotates relative to final drive casing 10; Planetary gear 16 in driven wheel 17 and the differential gear box 20 is meshed; Ring gear 15 is mounted by means of bolts on the differential gear box 20, 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 axle housing 4 concurrent assemblies, final drive casing 10 housings wherein are as the part of rear driving axle assembly supporting, this structure has effectively increased the ground Clearance of rear driving axle assembly centre portion, make the crossing ability of complete machine better, also simplified simultaneously the structure of axle housing 4, made axle housing be easy to processing, make.
The utility model rear driving axle assembly also comprises forces differential locking-device 5 and Parking Brake 3, described pressure differential locking-device 5 to comprise that the parts such as slip engaging sleeve 33, diff lock pin 34, piston 35, declutch shift shaft 36, retracing spring 37 and shift fork 38 form.Wherein the structure of diff lock pin 34 is that two ends are spherical straight pin, be installed in the differential gear box 20, one end sphere has the groove that matches with sphere near slip engaging sleeve 33, an end near driven wheel 17(driven wheel Excircle machining), slip engaging sleeve 33 can axially move along differential gear box 20 under the drive of shift fork 38.When car load normally travelled, all parts all were in initial installation site, forced differential locking-device 5 inoperative.When needs use pressure differential locking-device 5, piston 35 inwardly moves at piston cylinder 39 interior promotion declutch shift shafts 36 under the effect of oil pressure, because shift fork 38 is fixed on the declutch shift shaft 36, shift fork 38 moves inward synchronously, drive slip engaging sleeve 33 and inwardly slide, engaging 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 engaging 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 under the thrust of retracing spring 37 and slip engaging sleeve 33 returns to initial installation site, the pressure of 33 pairs of differential lock pins 34 of slip engaging sleeve disappears, when driven wheel 17 rotates at this moment, can promote differential lock pin 34 and outwards move along the mounting hole line of centers, make main reduction gear band differential assembly 1 recover differential function.
Described Parking Brake 3 is disk parking brakes, and it comprises drg body 30 and brake disc 31, and described 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 when rotating and differential gear box 20 rotates, and moment of torsion is passed to the axle drive shaft 6 of arranged on left and right sides, because taper driving gear 14 is different from the number of teeth of ring gear 15, thereby realize the reduction of rotating speed, increase simultaneously output torque.Axle drive shaft 6 is steady with power by engaging 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, sun wheel shaft 25 drives planetary wheel 23 and rotates, 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 by screw and in fact can not rotates for connecting element, so can only be that sun wheel shaft 25 revolves round the sun with hub reducer casing 22 in rotation, wheel reduction gear 22 shells drive wheel hub 8 and realize vehicles to overtake.Because sun wheel shaft 25 is different from 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 simultaneously, and the corresponding reduction of weight indirectly reduces oil consumption.
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 two ends, the left and right sides of axle housing (4), the arranged outside wheel reduction gear of wheel hub (8), main reduction gear band differential assembly (1) is installed at described 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 described brake assembly, and axle drive shaft (6) is rotationally connected the wheel reduction gear at axle housing (4) two ends;
It is characterized in that: also comprise and force differential locking-device (5) and Parking Brake (3);
Described pressure differential locking-device (5) comprises slip engaging sleeve (33), diff lock pin (34), piston (35), declutch shift shaft (36), retracing spring (37) and shift fork (38), described shift fork (38) is captiveed joint with declutch shift shaft (36), between shift fork (38) and the piston (35) retracing spring (37) is set, slip engaging sleeve (33) is provided with the groove that cooperates with shift fork (38), slip engaging sleeve (33) can axially move under the drive of shift fork (38), and the axle-shaft gear (17) of slip engaging sleeve (33) and main reduction gear band differential assembly (1) is corresponding is provided with the groove that matches with diff bearing pin (34);
Described Parking Brake (3) comprises drg body (30) and brake disc (31), described 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);
Described 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: described axle housing (4) section is " mouth " font cavity structure, its front-back is provided with reinforced rib (44), and described axle drive shaft (6) connects main reduction gear band differential assembly (1) and the wheel reduction gear at two ends by " mouth " font cavity.
3. rear driving axle assembly according to claim 2, it is characterized in that: described axle housing (1) inblock cast forms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220394350 CN202703132U (en) | 2012-08-09 | 2012-08-09 | Rear drive axle assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220394350 CN202703132U (en) | 2012-08-09 | 2012-08-09 | Rear drive axle assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202703132U true CN202703132U (en) | 2013-01-30 |
Family
ID=47583466
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220394350 Withdrawn - After Issue CN202703132U (en) | 2012-08-09 | 2012-08-09 | Rear drive axle assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202703132U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102774240A (en) * | 2012-08-09 | 2012-11-14 | 南京创捷和信汽车零部件有限公司 | Rear drive axle assembly |
| CN109130844A (en) * | 2018-09-11 | 2019-01-04 | 杜德术 | A kind of automobile multifunctional drive axle |
| CN109185418A (en) * | 2018-11-22 | 2019-01-11 | 浙江金道科技股份有限公司 | A kind of fork type differential mechanism with differential lock |
| CN109185420A (en) * | 2018-11-22 | 2019-01-11 | 浙江金道科技股份有限公司 | A kind of retarder |
| CN109552287A (en) * | 2017-09-26 | 2019-04-02 | 比亚迪股份有限公司 | Line control brake system and vehicle |
| CN112797135A (en) * | 2021-01-28 | 2021-05-14 | 恒大恒驰新能源汽车研究院(上海)有限公司 | Differential system and vehicle |
-
2012
- 2012-08-09 CN CN 201220394350 patent/CN202703132U/en not_active Withdrawn - After Issue
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102774240A (en) * | 2012-08-09 | 2012-11-14 | 南京创捷和信汽车零部件有限公司 | Rear drive axle assembly |
| CN102774240B (en) * | 2012-08-09 | 2014-01-29 | 南京创捷和信汽车零部件有限公司 | Rear drive axle assembly |
| CN109552287A (en) * | 2017-09-26 | 2019-04-02 | 比亚迪股份有限公司 | Line control brake system and vehicle |
| CN109130844A (en) * | 2018-09-11 | 2019-01-04 | 杜德术 | A kind of automobile multifunctional drive axle |
| CN109185418A (en) * | 2018-11-22 | 2019-01-11 | 浙江金道科技股份有限公司 | A kind of fork type differential mechanism with differential lock |
| CN109185420A (en) * | 2018-11-22 | 2019-01-11 | 浙江金道科技股份有限公司 | A kind of retarder |
| CN112797135A (en) * | 2021-01-28 | 2021-05-14 | 恒大恒驰新能源汽车研究院(上海)有限公司 | Differential system and vehicle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130130 Effective date of abandoning: 20140129 |
|
| RGAV | Abandon patent right to avoid regrant |