CN207634644U - A kind of main reducing gear band differential assembly for independent suspension - Google Patents

Abstract

The present invention discloses a main reducer with a differential gear assembly, comprising: a reducer housing, a driving gear installed in the reducer housing, a differential gear assembly and a driven gear. The front end of the reducer housing is provided with a first mounting surface, and both sides of the reducer housing are provided with second mounting surfaces. The protruding end of the driving gear is provided with a spline connected with the motor. The differential assembly is rotatably arranged in the reducer housing, including: a differential housing, a planetary gear shaft, a pair of planetary gears, and a pair of side shaft gears. The inner ring of the side gear is connected with a half shaft, and the half shaft protrudes from the reducer housing, and the protruding end is provided with a neck flange. The driven gear is sleeved on the outer peripheral surface of the differential case and meshed with the driving gear. The utility model can reduce the overall quality of the vehicle, reduce the unsprung quality and release the space of the chassis. The whole vehicle can adopt an independent suspension structure, and it is convenient to arrange various drive types such as front front drive, front rear drive, and rear rear drive.

Description

A main reducer with differential assembly for independent suspension

technical field

The utility model relates to a main reducer assembly for a drive train of a commercial vehicle, in particular to a main reducer belt differential assembly for independent suspension.

Background technique

With the continuous increase of domestic support for pure electric vehicles and the continuous improvement of basic supporting facilities, pure electric vehicles are facing good development opportunities. The pure electrification of commercial vehicles such as urban buses, commuter buses and urban logistics vehicles has become a trend.

With the rapid development of pure electric vehicles, the country's performance requirements for pure electric vehicles are also increasing year by year. However, most pure electric commercial vehicles in China still follow the traditional chassis layout at this stage, that is: The independent rear axle assembly is connected with the drive shaft between the motor and the rear axle. This arrangement has many unfavorable factors such as heavy chassis weight, large unsprung mass, and small battery compartment layout space, which makes it difficult to make a major breakthrough in the cruising range of the vehicle.

In order to meet the national standard and improve the technical level of the whole vehicle, it is a good solution to adopt the driving structure configuration with compact structure, lighter weight and independent suspension.

Utility model content

What the utility model needs to solve is that the chassis of the pure electric commercial vehicle is arranged in such a way that the motor is fixed on the frame, an independent rear axle assembly is adopted, and the motor and the rear axle are connected by a transmission shaft, so that the weight of the chassis is heavy and the unsprung mass is large 1. The technical problem of small space for battery compartment layout.

The utility model provides a main reducer belt differential assembly for independent suspension. The main reducer belt differential assembly of the new type is connected with the vehicle frame through the installation surfaces on both sides of the main reducer shell, reducing the The weight of the chassis is reduced, and the unsprung mass is reduced; the driving gear shaft of the new main reducer with differential assembly is connected to the output end of the motor through a spline, and the motor is directly fixed on the main reducer with differential assembly. , cancel the drive shaft between the motor and the rear axle, freeing up chassis space.

The technical scheme that the utility model adopts is:

A final drive belt differential assembly for independent suspension, characterized in that it includes:

A reducer housing, the front end of the reducer housing is provided with a first mounting surface and a first mounting hole; both sides of the reducer housing are provided with a second mounting surface and a second mounting hole;

The driving gear, the driving gear is installed in the reducer housing through the rotation of the inner and outer bearings, which includes a tooth portion and a shaft portion, the shaft portion protrudes from the first mounting surface, and the protruding end is provided with a spline;

Differential assembly, the differential assembly is rotatably arranged in the reducer housing, which includes: differential housing and planetary gear shaft installed in the differential housing, a pair of symmetrically arranged planets Gears and a pair of symmetrically arranged half-shaft gears;

The left and right ends of the differential housing are rotated in the reducer housing through bearings; the left and right sides of the differential housing are provided with mounting holes for axle gears, and the outer peripheral surface of the differential housing is provided with gear mounting parts;

The planetary gear shaft is arranged parallel to the driving gear shaft, and the two ends of the planetary gears are inserted and fixed in the differential case through the planetary gears respectively, and the planetary gears can rotate around the planetary gear shafts;

The side gear includes a neck and teeth, the side gear is rotatably installed in the side gear installation hole through its neck, and its teeth mesh with the planetary gear;

Two symmetrically arranged half-shafts, the two half-shafts are arranged on both sides of the planetary gear shaft and cross the planetary gear shaft, one end of the half-shaft is connected to the side-shaft gear through a spline, and the other end passes through the differential The housing is installed in the reducer housing through bearing rotation, and extends from the second mounting surface of the reducer housing;

Two symmetrically arranged neck flanges, the neck flanges are respectively fixed and fitted on the extension ends of the two half shafts through splines and lock nuts;

The driven gear is sleeved on the gear installation part of the differential case and meshedly connected with the driving gear.

Further, an adjustment spacer is provided between the inner and outer bearings of the driving gear, and the two ends of the adjustment spacer respectively abut against the inner rings of the inner and outer bearings. Adjust the preload of the inner and outer bearings by adjusting the thickness of the spacer ring, thereby improving the rotation accuracy of the drive gear shaft, improving the performance of the inner and outer bearings of the main gear, strengthening the rigidity of the drive gear shaft and improving its service life. Reduce noise.

Further, the outer part of the bearing of the differential housing is provided with an adjusting nut and a locking plate, the adjusting nut locks the outer ring of the bearing through the thread between the reducer housing, one end of the locking plate is inserted into the adjusting nut, and the other end is passed through the bolt fixed on the reducer housing. The preload of the bearing is adjusted through the adjusting nut, and the locking plate fixes the adjusting nut to prevent it from rotating during use.

Further, antifriction pads are provided on the rotating surfaces of the planetary gears, the side gears and the differential case. Anti-friction gaskets are used to reduce the friction between planetary gears, side gears and reducer housings, and improve the wear resistance of the entire differential assembly.

Further, a first oil seal is provided between the driving gear shaft and the reducer housing; a second oil seal is provided between the neck flange and the reducer housing. To reduce the friction of the transmission parts, the main reducer with differential assembly will be filled with lubricating oil during use, and the oil seal is designed to prevent the lubricating oil from leaking between the shafts.

Further, a dustproof cover is provided on the outside of the second oil seal. The setting of the dust cover prevents foreign matters such as water and sand from entering the oil seal, causing the oil seal to fail.

Further, the reducer housing also includes a reducer housing end cover, the reducer housing end cover is connected to the reducer housing through bolts, and the reducer housing and the reducer housing end cover form a structure for accommodating the differential The cavity of the assembly and the main and passive gears. The design of the end cover of the reducer housing is easy to disassemble, easy to overhaul and replace the lubricating oil.

The beneficial effects of the utility model:

1. By making the main reducer with differential assembly an independent integral unit and directly connecting the drive motor and fixing it on the chassis of the vehicle, the mass of the main reducer with differential assembly for the transmission vehicle is changed to a spring Improve the quality and improve the smoothness and comfort of the vehicle.

2. The use of this new model can make the whole vehicle adopt an independent suspension structure, cancel the axle housing assembly of the transmission-driven rear axle, further reduce the unsprung mass, and improve the ride comfort and passability of the whole vehicle.

3. The use of the new model can release the chassis space, facilitate the arrangement of battery packs for pure electric vehicles and increase the number of battery packs.

4. The main reducer belt differential assembly of the present invention can be conveniently arranged in the front of the vehicle (front front drive type) and the rear of the vehicle (front rear drive type or rear rear drive type).

Description of drawings

Fig. 1 is the front view of an embodiment of the utility model.

Fig. 2 is a left side view of Fig. 1 .

Fig. 3 is a cross-sectional view along A-A direction of Fig. 1 .

FIG. 4 is a partial enlarged view of B in FIG. 3 .

Detailed ways

In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings.

The meaning of "and/or" in this utility model refers to the fact that each exists alone or both exist simultaneously.

The meanings of "inside and outside" in the present invention refer to that relative to the device itself, the direction pointing to the inside of the device is inside, and vice versa is outside.

The meaning of "front end, both sides, left end, right end" mentioned in the utility model refers to the position shown in Figure 3 when the utility model is used, the upward end is the "front end", and the left side is the left side. (left end), the side facing the right is the right side (right end).

Referring to Figures 1 to 4, a final drive with differential assembly 1 for independent suspension includes: a reducer housing 100, a drive gear 200 disposed in the reducer housing 100, and a differential assembly Into 300 and passive gear 400.

The front end of the reducer housing 100 (the upper end shown in FIG. 3 ) is provided with a first mounting surface 101 and a first mounting hole 102. The first mounting surface 101 is a flange surface compatible with the motor front mounting surface, and the flange surface First mounting holes 102 are provided in the circumferential direction, and the first mounting holes 102 are threaded holes. In this embodiment, there are four first mounting holes 102 (see FIG. 2 ). In other embodiments, corresponding threaded holes may also be provided according to the weight of the motor. The first mounting hole 102 is used for fixedly connecting the front end of the motor. Both sides of the reducer housing 100 (the left and right sides of FIG. 3 ) are provided with a second mounting surface 103 and a second mounting hole 104; the second mounting holes 104 are threaded holes, four of which are symmetrically arranged in this embodiment, and other In the embodiment, the number and arrangement of the corresponding second mounting holes can also be designed according to the weight of the main reducer with differential assembly and the connected motor. The final drive belt differential assembly 1 is fixedly connected to the vehicle frame through the second mounting surface 103 and the second mounting hole 104 . The reducer housing 100 is provided with a reducer bearing mounting part 110 protruding outward from both ends of the second mounting surface 103 and extending into a cylindrical shape. The inside of the reducer bearing mounting part 110 is axially provided with a first passage hole 105 and second through hole 106 .

The reducer housing end cover 110 is fixedly connected with the reducer housing 100 by bolts. An oil plug 120 for filling or releasing lubricating oil is also provided on the end cover 110 of the reducer housing. The reducer housing end cover 110 and the reducer housing 100 enclose a cavity for accommodating the tooth portion 201 a of the driving gear 200 , the differential assembly 300 and the driven gear 400 .

The driving gear 200 is rotatably arranged in the reducer housing 100 through the inner bearing 206 and the outer bearing 204 . The driving gear includes a tooth portion 201a and a shaft portion 201b. The shaft portion 201b passes through the inner bearing 206, the adjustment spacer ring 205, and the outer bearing 204 from the inside to the outside. 202 is locked and fixed in the reducer housing 100 . The seat ring 203 is provided with an internal thread threadedly connected with the shaft portion 201b, and a first oil seal 203 is provided between the seat ring 203 and the reducer housing 100 . The protruding end of the shaft portion 201 is provided with a spline 2011, and the spline 2011 is used for connecting the output shaft of the motor. In this embodiment, the inner bearing 206 and the outer bearing 204 are single-row tapered roller bearings, and the adjusting spacer ring 205 is a steel sleeve with variable diameter at both ends. One end of the steel sleeve is against the inner ring of the inner bearing 206, and the other end is against the inner ring of the outer bearing 204 .

The differential assembly 300 includes: a differential case 310 , a planetary gear shaft 320 , a pair of planetary gears 330 and a pair of side gears 350 .

The left and right ends of the differential case 300 protrude outward to form a cylindrical differential bearing installation part 301, the bearing 341 is sleeved on the differential bearing installation part 301 and is arranged in the first through hole 105, and the bearing 341 is covered In the bearing housing (not shown in the figure), the outer end surface of the outer ring of the bearing 341 is pressed against the adjusting nut 342 . The adjusting nut 342 is in the shape of a sleeve with a hole in the bottom surface, and its outer peripheral surface is provided with external threads, and the first through hole 105 is provided with matching internal threads. The adjusting nut 342 locks the outer ring of the bearing 341 through the threads to adjust the bearing. 341 preload. The bearing shell is fixedly installed in the first through hole 105, and the end face of the bearing shell is provided with a slope with a boss, and a threaded hole is processed on the slope, and one end of the locking piece 343 is fixedly installed on the threaded hole of the slope of the bearing shell through a bolt, and its The other end is inserted into the adjusting nut 342 to prevent the bearing 341 from rotating during use. In this embodiment, the lock piece 343 is an L-shaped steel piece. The short side of the L shape is inserted into the adjustment nut 342, and the long side is fixed on the threaded hole of the bearing shell by bolts. The lock piece 343 has a certain ability to prevent its deformation stiffness. Bearing 341 is a single row tapered roller bearing. The left and right sides of the differential case 300 are provided with gear installation holes 302 , and the outer peripheral surface of the differential case 300 protrudes radially outward to form an annular gear installation surface 303 concentric with the half shaft 340 .

The two ends of the planetary gear shaft 320 are plugged and fixed in the reducer housing 100 through fixed pins (not shown in the figure), and can rotate synchronously with the reducer housing 100. The planetary gear shaft 320 is arranged in parallel with the driving gear 200, and the planetary gear 330 is sleeved on both ends of the planetary gear shaft 320 , the planetary gear 330 is in clearance fit with the planetary gear shaft 320 , and the planetary gear 330 can rotate around the planetary gear shaft 320 . Anti-friction gaskets are provided between the planetary gear 330 and the rotating surface of the reducer housing 100 .

The side gear 350 includes a neck and teeth. The neck of the side gear 350 is rotatably mounted in the gear installation hole 302 , and the teeth can mesh with the planetary gears 330 in pairs. Anti-friction pads are provided between the side gear 350 and the rotating surface of the reducer housing 100 .

Two half shafts 340 are arranged on both sides of the planetary gear shaft 320 and cross the planetary gear shaft 320. One end of the half shaft 340 is connected to the side gear 350 through a spline, and the other end passes through the differential case 100 The deep groove bearing 351 is arranged in the second through hole 106 of the reducer housing for rotation, and extends out from the second mounting surface 103 of the reducer housing, and the protruding end is provided with a spline. In this embodiment, the deep groove bearing 320 is a single row ball bearing.

The two necked flanges 360 are fixedly fitted on the protruding ends of the two half shafts 340 through splines and locking nuts 361 respectively; the necks thereof are located in the second through hole 106 . A second oil seal 362 is provided between the neck flange 360 and the reducer housing 100 , and a dust cover 363 is provided outside the second oil seal 362 .

The driven gear 400 is fixed on the annular gear mounting surface 303 by bolts, and the driven gear 400 is meshed with the driving gear 200 .

When the utility model is used, the transmission motor is first installed on the first mounting surface 101 of the front end of the main reducer belt differential assembly, and the output shaft of the motor is connected with the spline 2011 of the driving gear shaft 201; the transmission motor will be installed The final drive with differential assembly 1 is installed on the vehicle frame through the second mounting surface 103 on both sides; connect the two neck flanges 360 of the final drive with differential assembly 1 to the wheel connected to the drive shaft.

When the car is running straight, the motor drives the driving gear 200 to rotate, the driving gear 200 drives the passive gear 400 to rotate, the driven gear 400 drives the differential assembly 300 to revolve in the main reducer housing 100, and the planetary gears 330 engage the half gears on both sides. The shaft gear 350 revolves together with the differential gear assembly 300 in the reducer housing 100, and the two half shafts 340 transmit force and torque to the wheels through universal joints to drive the wheels to rotate.

When the car is turning, the planetary gear 330 generates self-rotation, and the planetary gear 330 transmits the revolution speed and its self-transmission speed to the outer wheel through the side gear 350, the side shaft 340, and the universal joint, and the speed of the outer wheel is greater than that of the inner wheel , so that the car turns smoothly.

Parts that are not specifically described in the above specification are all prior art, or can be realized by prior art.

Claims (7)

1. a kind of main reducing gear band differential assembly for independent suspension, which is characterized in that including：

The front end of reducer shell, the reducer shell is equipped with the first mounting surface and the first mounting hole；The two of reducer shell Side is equipped with the second mounting surface and the second mounting hole；

Driving gear, the driving gear are set to by the rotation of inside and outside bearing in reducing gearbox body comprising teeth portion and axle portion, Axle portion is stretched out from the first mounting surface, and external part is equipped with spline；

Differential assembly, the differential assembly are rotatably disposed in reducing gearbox body comprising：Differential casing and installation Planetary gear shaft, a pair of symmetrically arranged planetary gear in differential carrier body and a pair of symmetrically arranged axle shaft gear；

The left and right ends of differential casing are set to by bearing rotary in reducing gearbox body；The left and right sides of differential casing is equipped with The peripheral surface of axle shaft gear mounting hole, differential casing is equipped with gear mounting portion；

Planetary gear shaft is arranged in parallel with driving gear shaft, and both ends are each passed through planetary gear inserting and are fixed on differential casing Interior, planetary gear can be rotated around planetary gear shaft；

Axle shaft gear includes neck and teeth portion, and axle shaft gear is installed in rotation on by its neck in axle shaft gear mounting hole, Its teeth portion is engaged with planetary gear；

Two symmetrically arranged semiaxis, two semiaxis set up separately in the both sides of planetary gear shaft and are handed in cross with planetary gear shaft Fork, one end of semiaxis are connect by spline with axle shaft gear, and the other end, which is set to across differential casing by bearing rotation, to be subtracted In fast device shell, and extended out from the second mounting surface of reducer shell；

Two symmetrically arranged hubbed flanges, hubbed flange are fixedly set in two semiaxis by spline and locking nut respectively External part；

Driven gear, the driven gear are sleeved on the gear mounting portion of differential casing and engage connection with driving gear.

2. main reducing gear according to claim 1 band differential assembly, which is characterized in that the driving gear it is inside and outside Adjustment spacer ring is equipped between bearing, the both ends for adjusting spacer ring bear against the inner ring of inside and outside bearing.

3. main reducing gear band differential assembly according to claim 1, which is characterized in that the bearing of the differential casing Outside be equipped with adjusting nut and locking plate, adjusting nut by the screw thread lock shaft bearing outer-ring between reducer shell, locking plate Adjusting nut is inserted into one end, and the other end is bolted on reducer shell.

4. main reducing gear band differential assembly according to claim 1, which is characterized in that the planetary gear, half axle gear The plane of rotation of wheel and differential casing is equipped with anti-attrition gasket.

5. main reducing gear band differential assembly according to claim 1, which is characterized in that the driving gear shaft and deceleration The first oil sealing is equipped between device shell；The second oil sealing is equipped between the hubbed flange and reducer shell.

6. main reducing gear band differential assembly according to claim 5, which is characterized in that the outside of second oil sealing is set There is dust cover.

7. main reducing gear according to claim 1 band differential assembly, which is characterized in that the reducer shell further includes Reducer shell end cap, reducer shell end cap are connect by bolt with reducer shell, reducer shell and reducer shell End cap surrounds the cavity for accommodating differential assembly and active and passive gear.