CN204955928U - Double reduction rear drive axle assembly - Google Patents
Double reduction rear drive axle assembly Download PDFInfo
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- CN204955928U CN204955928U CN201520728718.2U CN201520728718U CN204955928U CN 204955928 U CN204955928 U CN 204955928U CN 201520728718 U CN201520728718 U CN 201520728718U CN 204955928 U CN204955928 U CN 204955928U
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- housing assembly
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Abstract
The utility model discloses a double reduction rear drive axle assembly, all be the level form including the rear -axle housing assembly that the level set up, main deceleration strip differential mechanism assembly, the setting that sets up in the middle part of the rear -axle housing assembly in the wheel hub assembly at rear -axle housing assembly both ends, two disc brake assemblies and two semi -axiss, the rear -axle housing assembly top and the bottom of main deceleration strip differential mechanism assembly department, the top and the bottom of main reducer shell all are the level form, wheel hub assembly is including rotating wheel hub and the wheel reduction who sets up at rear -axle housing assembly both ends, and wheel reduction includes wheel reduction shell, ring gear, sun gear, planet wheel carrier, more than one planet wheel and set up the end cover at the wheel hub assembly tip that the planet wheel meshes with sun gear and ring gear simultaneously, wheel hub and wheel reduction shell formula structure as an organic whole. The beneficial effects of the utility model are that: it is wide that compact structure, light, the main speed reducing ratio of quality cover the scope, can effectual reduction chassis height.
Description
Technical field
The utility model discloses a kind of double reduction rear driving axle assembly.
Background technology
Along with the continuous propelling of national Urbanization Construction, a large amount of population collection, at peri-urban, proposes higher requirement to the public conveyance and transportation in city, and for alleviating traffic pressure, public transport is all being greatly developed in various places, encourages trip public transport; Simultaneously along with the continuous enforcement of Environmental conservation policy, be reduce motor vehicle exhaust emission, country encourages the development of integral new-energy passenger particularly pure electric coach energetically, and national strategy height has been brought up in the research and development of integral new-energy passenger; Each car load manufacturing company and parts manufacturing company all drop into a lot of development resources to the research and development of new forms of energy vehicle; Particularly pure electronic demand can last very long always to integral new-energy passenger for passenger transport market.
But present stage integral new-energy passenger chassis driving axis is all continue to use original traditional product, because conventional drive axle assembly all adopts primary speed-down structure, bridge contour dimension is large, weight is large, takies space, chassis more, directly affects the height on floor in the capacity of cell of car load outfit and car.
Simultaneously, because the power of the integral new-energy passenger particularly power ratio conventional engines of the dynamic assembly of pure electric coach is little, for meeting the output torque requirement of car load, require that the reduction ratio of driving axis wants large, but the slowest ratio of primary speed-down driving axis is merely able to accomplish about 7.5; For meeting the requirement of car load dynamic property, only having the power of increasing motor or additionally increasing a change speed gear box again; If the power of increasing motor, the basis of equal capacity of cell can increase power consumption travelled distance is shortened, electrical motor contour dimension strengthens the space layout affecting chassis further simultaneously; Also additionally increasing manufacturing cost as increased the while that change speed gear box making control system complicated, also can sacrifice space, a part of chassis.Simultaneously the contour dimension of primary speed-down back axle is all larger, and it is higher that the height on car load floor is all arranged, causes adverse effect to the degree of utilization of interior space; Back door is essentially secondary and marks time.Also inconvenience is caused to getting on and off of passenger.
By the actual demand of integral new-energy passenger, increase capacity of cell, alleviate drive axle weight, reduce electrical motor power, to reduce floor level in car be a good prioritization scheme, but require that driving axis has larger optional ratio coverage, simultaneously lightweight, contour dimension is little.
Summary of the invention
The double reduction rear driving axle assembly that the purpose of this utility model is to provide a kind of compact conformation, quality is light, base ratio covering scope is wide, effectively can reduce chassis height.
For solving the problem, technical solution adopted in the utility model is:
A kind of double reduction rear driving axle assembly, comprise horizontally disposed rear axle housing assembly, be arranged on the main deceleration strip differential assembly in the middle part of rear axle housing assembly, the Hub assembly being arranged on rear axle housing assembly two ends, two disk brake assemblies and two semiaxis, rear axle housing assembly top and the bottom at main deceleration strip differential assembly place are all horizontal.
Described main deceleration strip differential assembly is comprised and is arranged on final drive casing in the middle part of rear axle housing assembly, is rotated the differential assembly be arranged in final drive casing by differential bearing, rotated be arranged on the driving gear in final drive casing, the ring gear be fixed on differential assembly, the planetary wheel be arranged on by center cross in differential assembly by main drive gear bearing, and one end of described semiaxis to be stretched in differential assembly and arranged axle side gear; Described driving gear is meshed with ring gear, and described planetary wheel is all meshed with two axle side gears.
Described Hub assembly comprises the wheel hub and the wheel reduction gear that rotate and be arranged on rear axle housing assembly two ends, described wheel reduction gear comprises hub reducer casing, is arranged on the gear ring at rear axle housing assembly two ends, is arranged on the sun wheel of the semiaxis other end, the planetary wheel carrier be fixed on hub reducer casing, rotate the end cap being arranged on more than one satellite gear on planetary wheel carrier and being arranged on Hub assembly end, described satellite gear engages with sun wheel and gear ring simultaneously, and described wheel hub and hub reducer casing are integral type structure.
Described disk brake assembly is fixed on rear axle housing assembly, and the brake disc of disk brake assembly is fixedly connected with wheel hub.
The utility model increases double reduction structure (wheel reduction gear) on drive axle two side wheel limit, the upper-lower height size of the contour dimension reducing driving axis particularly rear axle housing assembly is effectively to reduce the height of passenger-carrying chassis, very conveniently can realize different total reduction gear ratios to meet the coupling needs of car load output torque by the cooperation of different base ratios and double reduction ratio simultaneously, because adopt double reduction conceptual design to arrange, main reduction gear band differential assembly as primary speed-down can very little the size design of gear, so the design of main reduction gear band differential assembly contour dimension is very compact, two reduction gear is near wheel hub, as wheel reduction gear, arranged by different reducer gears, the different speed ratio matchings of rear driving axle assembly can be realized easily.Two reduction gear is arranged on driving axis two side wheel limit place, adopts planetary gear reducing mechanism design plan: sun wheel is driving link, and planetary wheel carrier is driven member, and gear ring is the type of drive of connecting element.Planet gear transmission has the motion characteristics of power dividing and coaxial line, and each center gear becomes the transmission of coaxial line, and internal messing application rationally, therefore, structure can be made closely, jointly load is shared owing to being dispersed with several satellite gear around sun wheel uniformly, therefore the load making each gear be subject to is less, so less modulus can be adopted during design, in addition, structurally make full use of the held volume of the large and internally toothed annulus of internal messing load-carrying capacity itself, thus reduce its contour dimension, make its mechanism compact, lightweight, volume is little, precision is high, load-carrying capacity is large.Meanwhile, due to the symmetry of Planetary Gear Transmission, namely it has several well-distributed satellite gear, and application force and antagonistic force are balanced, and then is conducive to improving driving efficiency, and its driving efficiency can reach 0.97-0.99; Operate steadily, the ability that opposing is impacted and shaken is strong, reliable operation simultaneously.In the utility model the rear axle housing assembly top at main deceleration strip differential assembly place and bottom all horizontal, and existing vehicle bridge top is arc-shaped protruding upward, bottom is the arc-shaped protruded downwards, the arc-shaped on top reduces the distance of cabin floor and vehicle bridge, and the arc-shaped contracting of bottom makes chassis bottommost in ground clearance one timing, chassis whole moves, thus the terrain clearance of chassis whole is larger, the application is set to horizontal, ensureing under the prerequisite that chassis bottommost terrain clearance is certain, reduce the height on chassis on the whole, thus the distance reduced between compartment and ground.
The traditional design plan of hub reducer casing is hub reducer casing and wheel hub is two independently parts, is bolted together when mounted by positioning spigot and 0 RunddichtringO; Structure is simple, but the form and position tolerance after general assembly and dimension limit be difficult to control and substantially bigger than normal, the actual condition of pinion rotation and theoretical environment is made to have relatively large deviation, direct running noise and the service life affecting wheel reduction gear, the plane place of simultaneously installing at two parts very easily oozes, oil leakage phenomenon, can cause quality fault and cause customer complaint.The design plan of integration then avoids the generation of the problems referred to above, because be that integrated design can ensure that when machine up clamped one time can complete whole course of processing, form and position tolerance and dimensional discrepancy all can control in scope of design, the applying working condition of hub reduction gear is made to be in theoretical environment, the low and long service life of running noise; Simultaneously be designed with wheel bolt mounting hole and brake disc mounting hole at the faying face place of installing with wheel rim, outermost is designed with the tapped bore installed with end cap to meet the installation requirement of assembly.
As further improvement of the utility model, it is hexagon that described final drive casing obtains vertical section.Final drive casing is bolted on rear axle housing assembly, and hexagonal profile is convenient to the location of bolt hole, convenient manufacture.
As further improvement of the utility model, described main drive gear bearing is arranged in final drive casing by driving gear shaft bearing, and described driving gear shaft bearing and final drive casing are integral type project organization.
Traditional design scheme is that driving gear shaft bearing is installed and final drive casing is separated into two parts, linked together by positioning spigot bolt, O-ring seals, structure is relatively simple, but intensity is low, the easy oil leakage of faying face place causes speed reduction gearing to damage, and the hub reducer casing of the application's two reduction gear and hub design into a single integrated structure, increase parts intensity, reduce component weight and improve reliability, form and position tolerance is easy to ensure, minimizing seal point reduces leakage of oil risk compared with conventional confguration.
As further improvement of the utility model, described semiaxis is fully floating axle, and described rear axle housing assembly is hollow structure, and described semiaxis is through the rear axle housing assembly of hollow structure, and two ends arrange axle side gear and sun wheel respectively.
Adopt fully floating axle; semiaxis and axle housing are not contacted directly; ground effects all can not be applied directly on semiaxis in the various counter-forces of wheel; therefore semiaxis does not only bear torque; and do not bear the moment of flexure of various counter-force machine formation; and semiaxis is positioned at the hollow part of back axle assembly, semiaxis is played to the effect of protection, not the transmission of influence power.
In sum, the beneficial effects of the utility model are: compact conformation, quality are light, base ratio covering scope is wide, can effectively reduce chassis height.
Accompanying drawing explanation
Fig. 1 is front view of the present utility model.
Fig. 2 is birds-eye view of the present utility model.
Fig. 3 is the partial enlarged drawing at A place in Fig. 2.
Fig. 4 is the partial enlarged drawing at B place in Fig. 2.
Wherein: 1, rear axle housing assembly; 2, main deceleration strip differential assembly; 3, semiaxis; 4, disk brake assembly; 5, brake disc; 6, wheel hub; 7, bearing; 8, gear ring supports; 9, gear ring; 10, planetary wheel carrier; 11, sun wheel; 12, planet wheel spindle; 13, satellite gear; 14, end cap; 15, Hub assembly; 16, final drive casing; 17, main drive gear bearing; 18, driving gear; 19, ring gear; 20, differential assembly; 21, planetary wheel; 22, axle side gear; 23, hub reducer casing; 24, driving gear shaft bearing 25, differential bearing; 26, center cross.
Detailed description of the invention
Below in conjunction with accompanying drawing, detailed description of the invention of the present utility model is described further.
Double reduction rear driving axle assembly as shown in Figures 1 to 4, comprises horizontally disposed rear axle housing assembly 1, is arranged on main deceleration strip differential assembly 2 in the middle part of rear axle housing assembly 1, is arranged on Hub assembly 15, two disk brake assemblies 4 at rear axle housing assembly 1 two ends are connected main deceleration strip differential assembly 2 and Hub assembly 15 semiaxis 3 with two.
Described main deceleration strip differential assembly 2 comprises the final drive casing 16 be arranged in the middle part of rear axle housing assembly 1, the differential assembly 20 be arranged in final drive casing 16 is rotated by two differential bearings 25, the driving gear 18 be arranged in final drive casing 16 is rotated by main drive gear bearing 17, be fixed on the ring gear 19 of differential assembly 20 periphery, the planetary wheel 21 in differential assembly 20 is arranged on by center cross 26, the housing that described differential assembly 20 is hemispherical shell by two inner chambers is formed, two housing junctions arrange four through holes matched with center cross 26, four planetary wheels 21 are arranged on center cross 26, the outer ring of two differential bearings 25 is fixed in final drive casing 16, the two ends of differential assembly 20 are separately fixed in the inner ring of differential bearing 25, one end of described semiaxis 3 to be stretched in differential assembly 20 and is arranged axle side gear 22, described driving gear 18 is meshed with ring gear 19, and described planetary wheel 21 is all meshed with two axle side gears 22, and be first arranged on center cross 26 by planetary wheel 21 during installation, both sides axle side gear 22 is arranged on the both sides of planetary wheel 21, to form two housings docking of differential assembly 20, center cross 26 to be stuck on two housings in four through holes, four planetary wheels 21 is all meshed with two axle side gears 22, fixes two housings of formation differential assembly 20 with bolt.Two semiaxis 3 one end are stretched in two housings of differential assembly 20 respectively, and is connected with axle side gear 22 respectively; In the utility model, the end of semiaxis 3 is provided with male splines, arranges female splines in axle side gear 22, inside and outside spline fitted, makes not relatively rotate between semiaxis 3 and axle side gear 22, as shown in Figure 3.Chassis dynamic assembly (not shown) output torque is on driving gear 18, driving gear 18 is by increasing moment of torsion conversion direction with engaging of ring gear 19, differential assembly 20 is driven to rotate, when keeping straight on, differential assembly 20 and semiaxis 3 are with identical rotational speed, now planetary wheel 21 only revolves round the sun around the line of centers of semiaxis, and does not have rotation, and two semiaxis 3 rotate Hub assembly moment of torsion being evenly distributed to driving axis both sides.When the vehicle is turning, the distance of two wheel hubs is different, and planetary wheel 21, except revolution, also around center cross 26 rotation, thus changes the rotating speed of two wheel hubs.
Described Hub assembly 15 comprises the wheel hub 6 and the wheel reduction gear that are arranged on rear axle housing assembly 1 two ends by bearing 7 rotation, described wheel reduction gear comprises hub reducer casing 23, the gear ring 9 that 8 are arranged on rear axle housing assembly 1 two ends is supported by gear ring, the sun wheel 11 being arranged on semiaxis 3 other end (semiaxis 3 arranges male splines, Inner spline is set in sun wheel 11, Inner spline and male splines cooperation realize between semiaxis 3 and sun wheel 11 without fixing in relative rotation), be fixed on the planetary wheel carrier 10 on hub reducer casing 23, (the present embodiment preferred satellite gear 13 quantity is five to be arranged on more than one satellite gear 13 on planetary wheel carrier 10 by planet wheel spindle 12 rotation, circumferencial direction along sun wheel 11 is uniformly distributed) and be arranged on the end cap 14 of Hub assembly 15 end, described satellite gear 13 engages with sun wheel 11 and gear ring 9 simultaneously, described wheel hub 6 is integral type structure with hub reducer casing 23.Semiaxis 3 rotates, and sun wheel 11 is together rotated, because satellite gear 13 is meshed with sun wheel 11 and gear ring 9 simultaneously, satellite gear 13 has the trend driving gear ring 9 to revolve round the sun; But in fact gear ring 9 is fixed on axle housing, can not rotate; Antagonistic force drives planetary wheel carrier to rotate, and namely satellite gear 13 drives planetary wheel carrier 10 to revolve round the sun while autobiography; And planetary wheel carrier 10 and wheel hub 6 and hub reducer casing 23 link together, thus wheel hub 6 rotation is driven to realize driving wheel advance or fall back.
Described disk brake assembly is fixed on rear axle housing assembly 1, and the brake disc 5 of disk brake assembly is fixedly connected with wheel hub 6.
Described main drive gear bearing 17 is arranged in final drive casing 16 by driving gear shaft bearing 24, and described driving gear shaft bearing 24 is integral type structure with final drive casing 16.
The preferred semiaxis 3 of the utility model is fully floating axle, and described rear axle housing assembly 1 is hollow structure, and the two ends of described semiaxis 3 are rotated by bearing and are arranged in rear axle housing assembly 1.
Principle of work: in chassis dynamic assembly output torque to main reduction gear band differential assembly on driving gear 18, driving gear 18 is by increasing moment of torsion conversion direction with engaging of ring gear 19, both sides are evenly distributed to by fully floating axle 3 turning handle moment of torsion, fully floating axle 3 and sun wheel 11 are installed together, sun wheel 11 is rotated and is driven satellite gear 13 to rotate, because satellite gear 13 engages with gear ring 9 simultaneously, satellite gear 13 has the trend driving gear ring 9 to revolve round the sun; But in fact gear ring 9 is fixed on rear axle housing assembly 1 and can not rotates; Antagonistic force drives planetary wheel carrier 10 to rotate, and namely satellite gear 13 drives planetary wheel carrier 10 to revolve round the sun while rotation; And planetary wheel carrier 10 and wheel hub 6 and hub reducer casing 23 link together, thus wheel hub 6 rotation is driven to realize driving wheel advance or fall back.
Be prior art for what be specifically noted or can be realized by existing technology in the utility model specification sheets; should be understood that; for those of ordinary skills; can be improved according to the above description or convert, and all these improve and convert the protection domain that all should belong to the utility model claims.
Claims (4)
1. a double reduction rear driving axle assembly, it is characterized in that: comprise horizontally disposed rear axle housing assembly (1), be arranged on the main deceleration strip differential assembly (2) at rear axle housing assembly (1) middle part, wheel hub (6) assembly being arranged on rear axle housing assembly (1) two ends, two disk brake assemblies (4) and two semiaxis (3), rear axle housing assembly (1) top and the bottom at main deceleration strip differential assembly (2) place are all horizontal;
Described main deceleration strip differential assembly (2) comprises the final drive casing (16) being arranged on rear axle housing assembly (1) middle part, the differential assembly (20) be arranged in final drive casing (16) is rotated by differential bearing (25), the driving gear (18) be arranged in final drive casing (16) is rotated by main drive gear bearing (17), be fixed on the ring gear (19) on differential assembly (20), the planetary wheel (21) in differential assembly (20) is arranged on by center cross (26), one end of described semiaxis (3) to be stretched in differential assembly (20) and is arranged axle side gear (22), described driving gear (18) is meshed with ring gear (19), and described planetary wheel (21) is all meshed with two axle side gears (22),
Described wheel hub (6) assembly comprises wheel hub (6) and the wheel reduction gear that rotation is arranged on rear axle housing assembly (1) two ends, described wheel reduction gear comprises hub reducer casing (23), be arranged on the gear ring (9) at rear axle housing assembly (1) two ends, be arranged on the sun wheel (11) of semiaxis (3) other end, be fixed on the planetary wheel carrier (10) on hub reducer casing (23), rotation is arranged on the upper more than one satellite gear (13) of planetary wheel carrier (10) and is arranged on the end cap (14) of wheel hub (6) assembly end, described satellite gear (13) engages with sun wheel (11) and gear ring (9) simultaneously, described wheel hub (6) and hub reducer casing (23) are integral type structure,
Described disk brake assembly (4) is fixed on rear axle housing assembly (1), and the brake disc (5) of disk brake assembly (4) is fixedly connected with wheel hub (6).
2. double reduction rear driving axle assembly according to claim 1, is characterized in that: it is hexagon that described final drive casing (16) obtains vertical section.
3. double reduction rear driving axle assembly according to claim 1, it is characterized in that: described main drive gear bearing (17) is arranged in final drive casing (16) by driving gear shaft bearing, described driving gear shaft bearing and final drive casing (16) are integral type structure.
4. double reduction rear driving axle assembly according to claim 1, it is characterized in that: described semiaxis (3) is fully floating axle, described rear axle housing assembly (1) is hollow structure, described semiaxis (3) is through the rear axle housing assembly (1) of hollow structure, and two ends arrange axle side gear (22) and sun wheel (11) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520728718.2U CN204955928U (en) | 2015-09-18 | 2015-09-18 | Double reduction rear drive axle assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520728718.2U CN204955928U (en) | 2015-09-18 | 2015-09-18 | Double reduction rear drive axle assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204955928U true CN204955928U (en) | 2016-01-13 |
Family
ID=55051016
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520728718.2U Withdrawn - After Issue CN204955928U (en) | 2015-09-18 | 2015-09-18 | Double reduction rear drive axle assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204955928U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105059056A (en) * | 2015-09-18 | 2015-11-18 | 南京创捷和信汽车零部件有限公司 | Secondary speed-reduction rear driving axle assembly |
| CN109895620A (en) * | 2017-12-08 | 2019-06-18 | 郑州宇通客车股份有限公司 | A kind of drive assembly and vehicle |
-
2015
- 2015-09-18 CN CN201520728718.2U patent/CN204955928U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105059056A (en) * | 2015-09-18 | 2015-11-18 | 南京创捷和信汽车零部件有限公司 | Secondary speed-reduction rear driving axle assembly |
| CN105059056B (en) * | 2015-09-18 | 2017-12-26 | 南京创捷和信汽车零部件有限公司 | Double reduction rear driving axle assembly |
| CN109895620A (en) * | 2017-12-08 | 2019-06-18 | 郑州宇通客车股份有限公司 | A kind of drive assembly 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: 20160113 Effective date of abandoning: 20171226 |