CN211166257U - Air pressure disc type rear axle assembly for new energy passenger car - Google Patents
Air pressure disc type rear axle assembly for new energy passenger car Download PDFInfo
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- CN211166257U CN211166257U CN201922288752.3U CN201922288752U CN211166257U CN 211166257 U CN211166257 U CN 211166257U CN 201922288752 U CN201922288752 U CN 201922288752U CN 211166257 U CN211166257 U CN 211166257U
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Abstract
The utility model discloses an air pressure disc type rear axle assembly for a new energy passenger car, which comprises a rear axle housing, a main speed reducer assembly with a differential mechanism, a hub bearing unit, a brake disc, a disc brake mounting bracket, a disc brake, a brake chamber and a half axle; the utility model designs the hub bearing unit as the pre-assembly, and after the bearing inner ring is fastened according to the set torque value during the assembly of the rear axle assembly, the bearing clearance can be ensured to be in the optimum value, and the bearing can be ensured to be in the design life in the optimum clearance; moreover, when the bearing is preassembled, namely, the bearing space is filled with the extreme pressure high-temperature resistant lubricating grease at one time, and the lubricating oil or the lubricating grease is not required to be replaced in the using process; therefore, the bearing of the whole vehicle is not required to be maintained and replaced in the service cycle, the maintenance-free wheel edge structure is realized, the maintenance cost is saved, and the attendance rate of the whole vehicle is increased.
Description
Technical Field
The utility model relates to an automobile drive axle technical field, concretely relates to new forms of energy passenger train is with air pressure disk rear axle assembly.
Background
With the continuous development of national road infrastructure, the trip frequency of people rises year by year, and the people are mainly transported by passenger cars in short and medium trips. With the progress of new energy driving technology and the development of encouragement policies of new energy passenger cars by the state, the large-scale medium and short-distance passenger cars are the trend of passenger transport development, and passenger transport enterprises are gradually improving the control on the comfort of the whole car and the running noise of the whole car in order to meet the continuously improved riding experience requirements of passengers. In addition, with continuous research and development and application of new technologies and new processes, a host factory also puts higher requirements on the quality of parts of the rear axle assembly, and parts needing regular maintenance and repair in an original structure are expected to be free of maintenance or the maintenance interval is expected to be prolonged.
The wheel limit structure of disk rear axle assembly for current new forms of energy passenger train generally is: an inner bearing and an outer bearing are arranged in the hub, and the bearing clearance adjustment is manual adjustment when the rear axle assembly is installed. The consistency of manual adjustment is difficult to guarantee, the service life of the bearing is not expected, only a regular maintenance period of a quality guarantee period is set, and a customer is required to periodically disassemble and maintain and replace lubricating grease or the bearing according to the maintenance period. The existing drum-type rear axle assembly for the new energy passenger car needs regular maintenance of the wheel edge, replacement of grease, inner and outer bearings of the wheel hub and other work, the maintenance frequency is high, the maintenance cost is high, and the attendance rate of the whole car is low.
In addition, the whole vehicle suspension frame structure of the disc type rear axle assembly for the existing new energy passenger vehicle is unreasonable in design, and the arrangement requirements of different customers on the whole vehicle suspension frame cannot be met during the modification of the rear axle assembly.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a simple structure, low noise, wheel hub bearing exempt from to maintain, satisfy the atmospheric pressure disk rear axle assembly of new forms of energy passenger train demand.
The utility model discloses a first technical scheme be: an air pressure disc type rear axle assembly for a new energy passenger car comprises a rear axle housing, a main speed reducer assembly with a differential mechanism, a hub bearing unit, a brake disc, a disc brake mounting bracket, a disc brake, a brake air chamber and a half axle; the main speed reducer with the differential assembly is arranged in the middle of the rear axle housing, the brake disc, the disc brake mounting bracket and the hub bearing unit are arranged at two ends of the rear axle housing, the disc brake is arranged on the disc brake mounting bracket, the brake air chamber is arranged on the disc brake, the half shaft penetrates through the cavity of the rear axle housing, the front end of the half shaft is connected with the half shaft gear of the main speed reducer with the differential assembly, and the rear end of the half shaft is fixed on the hub bearing unit through a bolt; the hub bearing unit comprises a hub, an inner bearing, an inner oil seal, an outer bearing and an outer oil seal, wherein the inner bearing, the inner oil seal, the outer bearing and the outer oil seal are arranged in an inner cavity of the hub; the inner oil seal is pressed in the inner cavity of the hub in an interference fit manner, and the inner ring of the oil seal is hermetically sleeved on the inner ring of the bearing of the inner bearing; the outer oil seal is pressed in the inner cavity of the hub in an interference fit manner, and the inner ring of the oil seal is hermetically sleeved on the inner ring of the bearing of the outer bearing; the space sealed by the inner and outer oil seals is filled with extreme pressure high temperature resistant lubricating grease.
By adopting the technical scheme, the hub bearing unit is designed into a pre-assembly, the bearing outer ring is fixed in advance through interference fit during pre-assembly, and the clearance between the inner bearing and the outer bearing can be ensured to be at the optimal value after the bearing inner ring is fastened according to the set torque value during rear axle assembly, so that the bearing can be ensured to be in the design life in the optimal clearance; moreover, when the bearing is preassembled, the bearing space is filled with extreme pressure high temperature resistant lubricating grease at one time, and lubricating oil or lubricating grease is not required to be replaced in the using process; therefore, the bearing of the whole vehicle is not required to be maintained and replaced in the service cycle, the maintenance-free wheel edge structure is realized, the maintenance cost is saved, and the attendance rate of the whole vehicle is increased.
The utility model discloses a second technical scheme be the improvement on first technical scheme, the utility model discloses a second technical scheme be: the inner and outer bearing rings are connected via elastic ring on the inner side of inner bearing ring, and the outer side of the joint of two inner bearing rings is provided with middle sealing ring.
By adopting the technical scheme, on one hand, the inner ring of the bearing cannot fall off in the transferring process after the inner bearing and the outer bearing are installed on the hub; on the other hand, the design of the middle sealing ring can further avoid the leakage of lubricating grease in the bearing space, and the service life of the bearing is ensured.
The utility model discloses a third technical scheme be the improvement on the second technical scheme, the utility model discloses a third technical scheme be: and a half shaft oil seal is arranged between the rear axle housing and the half shaft.
By adopting the technical scheme, the internal lubricating system of the hub bearing unit and the lubricating oil of the main speed reducer with the differential assembly can be prevented from communicating, and the service life of the bearing of the hub bearing unit is further prolonged.
The utility model discloses a fourth technical scheme be the improvement on first technical scheme, the utility model discloses a fourth technical scheme be: the disc brake mounting bracket comprises a central part and two wing parts, wherein the central part of the disc brake mounting bracket is provided with a flange part for connecting an axle housing, the central part of the flange part is provided with a mounting positioning hole, a plurality of mounting through holes are uniformly distributed on the outer edge part of the flange part, two wing parts for connecting the disc brake are symmetrically arranged on two sides of the flange part, and each wing part is provided with a plurality of disc brake mounting holes; the central lines of the two wing parts and the central line of the flange part form an included angle (A), and the included angle (A) is 0-180 degrees.
By adopting the technical scheme, the disc brake mounting bracket with different included angles A can be manufactured according to the needs of customers, and different angle deflection of the disc brake relative to the axial center of the axle housing can be realized by changing the included angle A, so that the modification of the rear axle assembly is realized, and the requirements of different customers on the arrangement of the whole vehicle suspension are met.
The utility model discloses a fifth technical scheme be the improvement on the fourth technical scheme, the utility model discloses a fifth technical scheme be: when the axle housing is axially observed, the two wing parts and the flange part form a triangular structure, and the two wing parts are opened towards the left side and the right side on the upper side of the flange part; viewed from top to bottom, the two wing portions lie in the same plane, with the flange portion projecting out of that plane.
By adopting the technical scheme, the mounting is convenient, and the modification of the rear axle assembly is easier to realize.
The utility model discloses a sixth technical scheme be the improvement on first technical scheme, the utility model discloses a sixth technical scheme be: the main speed reducer with differential assembly comprises a main speed reducer shell, a driving gear, a driven gear and a differential; the differential comprises a differential shell, a half axle gear, a planetary gear and a planetary gear shaft; the main reducing gear casing passes through the bolt fastening on the rear axle housing, and the driving gear is connected with driving motor through installing the flange at its gear shaft axle head, and driven gear and driving gear meshing are connected, and differential mechanism casing passes through the bearing rotatable main reducing gear casing of locating and fixes on driven gear through the bolt, and planetary gear passes through the planetary gear axle to be fixed in differential mechanism casing, and planetary gear and half axle gear meshing are connected, and half axle gear passes through the splined connection semi-axis.
By adopting the technical scheme, the rear axle assembly has the advantages of simple structure, low running noise and no maintenance of the hub bearing, and can meet the requirement of continuous development of new energy passenger cars.
The utility model has the advantages that: the utility model discloses an atmospheric pressure disk rear axle assembly, through designing wheel hub bearing unit to the subassembly, through interference fit pre-fixing bearing outer lane when preassembling, after fastening the bearing inner race according to setting for the moment of torsion value when rear axle assembly assembles, can guarantee that the play of inner bearing and outer bearing is in the optimum, can guarantee in this optimum play that the wheel hub bearing is in the design life-span; through once only filling extreme pressure high temperature resistant lubricating grease in the bearing space when the pre-installation, need not to change lubricating oil or lubricating grease in the use to realize that whole car need not maintain the change bearing in life cycle, realize the non-maintaining of wheel limit structure, save the maintenance cost, increase whole car rate of attendance.
Drawings
Fig. 1 is a schematic view showing the appearance of an air pressure disc type rear axle assembly for a new energy passenger car according to embodiment 1 of the present invention.
FIG. 2 is a schematic view of the connection of the final drive belt differential assembly of embodiment 1 to a rear axle housing.
Fig. 3 is a schematic view of the wheel rim structure of embodiment 1.
Fig. 4 is a schematic structural view of a hub bearing unit of embodiment 1.
Fig. 5 is a schematic structural view of a disc brake mounting bracket of embodiment 1.
Fig. 6 is a side view of fig. 5.
Detailed Description
For a better understanding of the present invention, the following examples are provided to further illustrate the present invention, but the present invention is not limited to the following examples.
Example 1
Referring to fig. 1, the application provides a new forms of energy are air pressure disc rear axle assembly for passenger train, including rear-axle housing 1, main reducer area differential mechanism assembly 3, disc brake installing support 4, brake disc 5, wheel hub bearing unit 6, wheel bolt 7, disc brake 8, brake chamber 9 and semi-axis 11.
Referring to fig. 2, the rear axle housing 1 is composed of an axle housing middle section, an axle housing cover and a half-axle sleeve, the axle housing middle section is in a spindle shape with two small ends and a large middle part, a cavity for accommodating the main speed reducer with the differential assembly 3 is arranged in the middle part, the axle housing cover is welded at the bottom of the cavity, and a flange plate is welded at the top of the cavity and used for installing the main speed reducer housing. The axle housing is welded at two ends of the middle section of the axle housing and used for installing components such as an axle shaft, a hub bearing unit, a disc brake mounting bracket and the like.
With continued reference to fig. 2, the final drive belt differential assembly 3 includes a final drive housing 31, and a driving gear 33, a driven gear 34 and a differential disposed in the final drive housing 31; the differential includes a differential case 35, and side gears 36 and planet gears 37 and planet gear shafts 38 disposed within the differential case 35. The main reducer casing 31 is fixed on the rear axle housing 1 through bolts 2, the driving gear 33 is connected with the driving motor through a flange 32 installed at the shaft end of a gear shaft of the driving gear 33, the driven gear 34 is meshed with the driving gear 33 to form a gear pair, and the differential casing 35 is rotatably arranged in the main reducer casing 31 through a bearing and is fixed on the back of the driven gear 34 through bolts to synchronously rotate with the driven gear 34. The planetary gears 37 are fixed in the differential case 35 through planetary gear shafts 38, and rotate synchronously with the differential case 35; the side gears 36 are connected in mesh with the planetary gears 37.
Referring to fig. 4, the hub bearing unit 6 includes a hub 61, an inner oil seal 66, an inner bearing 65, an outer bearing 62, an outer oil seal 63, a circlip 64, and an intermediate seal ring 67. The hub 61 is provided with an inner cavity for mounting a hub bearing, the axial center part of the inner cavity of the hub is provided with an annular blocking part, and two sides of the annular blocking part form two blocking shoulders. The outer bearing 62 is press-fitted in the inner cavity of the hub, the outer bearing outer ring 622 is connected with the hub in an interference fit manner, and the inner end face of the bearing outer ring 622 abuts against a retaining shoulder on one side of the hub. The inner bearing 65 is pressed in the inner cavity of the hub, the outer bearing outer ring 652 is connected with the hub in an interference fit manner, and the inner end face of the bearing outer ring 652 abuts against the retaining shoulder on the other side of the hub. The inner bearing ring 621 of the outer bearing is against the end face of the inner bearing ring 651 of the inner bearing, the inner side faces of the two inner bearing rings are connected through the elastic retainer ring 64, and the outer side face of the joint of the two inner bearing rings is provided with the middle sealing ring 67. The inner oil seal 66 is press-mounted in the inner cavity of the hub through the interference fit of the outer ring of the oil seal, and the inner ring of the oil seal is a lip sealing surface and is mounted on the inner bearing inner ring 651 in a matching way; the outer oil seal 63 is press-mounted in the inner cavity of the hub through the interference fit of the outer ring of the oil seal, and the inner ring of the oil seal is a lip sealing surface and is mounted on the inner ring 621 of the outer bearing in a matching way; a relatively closed bearing space is formed among the inner oil seal 66, the outer oil seal 63 and the middle sealing ring 67, and extreme pressure high temperature grease is filled in the bearing space.
Referring to fig. 3, the hub bearing unit 6 is sleeved on the rear axle housing 1 through the inner bearing 65 and the outer bearing 62, the other end surface of the inner bearing inner ring 651 abuts against the step surface of the rear axle housing, and the other end surface of the outer bearing inner ring 621 is fastened on the rear axle housing through the lock nut 15; the wheel bolt 7 is press-fitted on the hub 61 by interference fit. The two half shafts 11 axially penetrate through a half shaft sleeve of the rear axle housing 1 respectively, an external spline at the front end of the half shaft 11 is connected with an internal spline on the half shaft gear 36, a flange end is fixed on the outer end face of a hub 111 of the hub bearing unit 11 through a half shaft mounting bolt 12, and a half shaft oil seal 16 is arranged between the half shafts and the rear axle housing. The driving motor distributes power to the left half shaft 11 and the right half shaft 11 through the main speed reducer with the differential mechanism assembly 3, and the half shafts 11 drive the wheel hubs to rotate so as to drive the whole vehicle to run.
Referring to fig. 5 and 6, in the present embodiment, the disc brake mounting bracket 4 is an independently designed component, the center portion of the disk brake mounting bracket is provided with a flange portion 41 for connecting the axle housing 1, the center portion of the flange portion 41 is provided with a mounting positioning hole 43, the outer edge portion of the flange portion is uniformly distributed with a plurality of mounting through holes 411, in the present embodiment, 12 mounting through holes are provided, two wing portions 42 for connecting the disc brake 8 are symmetrically provided on two sides of the flange portion 41, each wing portion 42 is provided with a plurality of disc brake mounting holes 421, in the present embodiment, 3 mounting through holes are provided. Viewed from the axle housing axial direction, the two wing parts 42 and the flange part 41 form a triangular structure, the two wing parts 42 are opened towards the left side and the right side on the upper side of the flange part 41, the centers of the two wing parts 42 and the center of the flange part 41 form an included angle A, and the included angle A can be selected within the range of 0-180 degrees; the two wings 42 lie in the same plane, viewed from above, and the flange 41 projects out of this plane.
Referring to fig. 1 and 3, the brake disc 5 is fixed on the inner side of the hub 61 by the mounting bolts 14, and the disc brake mounting bracket 4 is sleeved on the rear axle housing 1 by the mounting positioning holes 43 and fixed on the flange surfaces 101 at both ends of the axle housing 1 by the mounting bolts 13 passing through the flange portion mounting through holes 411. The disc brake 8 is fixed to the disc brake mounting bracket 4 by a mounting bolt 10 inserted through a wing disc brake mounting hole 421 of the disc brake mounting bracket, and the brake chamber 9 is fixed to the disc brake 8 by a mounting bolt and a nut provided thereto. The disc brake mounting bracket 4 with different included angles A is manufactured according to the requirements of customers, and different angle deflection of the disc brake 8 relative to the axial center of the axle housing can be realized by changing the included angle A, so that the modification of the rear axle assembly is realized, and the requirements of different customers on the arrangement of the whole vehicle suspension are met. The brake disc and the disc brake of the application are the prior art, and the specific structure and the working principle are not repeated.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (6)
1. An air pressure disc type rear axle assembly for a new energy passenger car comprises a rear axle housing, a main speed reducer assembly with a differential mechanism, a hub bearing unit, a brake disc, a disc brake mounting bracket, a disc brake, a brake air chamber and a half axle; the main speed reducer with the differential assembly is arranged in the middle of the rear axle housing, the brake disc, the disc brake mounting bracket and the hub bearing unit are arranged at two ends of the rear axle housing, the disc brake is arranged on the disc brake mounting bracket, the brake air chamber is arranged on the disc brake, the half shaft penetrates through the cavity of the rear axle housing, the front end of the half shaft is connected with the half shaft gear of the main speed reducer with the differential assembly, and the rear end of the half shaft is fixed on the hub bearing unit through a bolt; the method is characterized in that:
the hub bearing unit comprises a hub, an inner bearing, an inner oil seal, an outer bearing and an outer oil seal, wherein the inner bearing, the inner oil seal, the outer bearing and the outer oil seal are arranged in an inner cavity of the hub; the inner oil seal is pressed in the inner cavity of the hub in an interference fit manner, and the inner ring of the oil seal is hermetically sleeved on the inner ring of the bearing of the inner bearing; the outer oil seal is pressed in the inner cavity of the hub in an interference fit manner, and the inner ring of the oil seal is hermetically sleeved on the inner ring of the bearing of the outer bearing; the space sealed by the inner and outer oil seals is filled with extreme pressure high temperature resistant lubricating grease.
2. The air pressure disc type rear axle assembly for the new energy passenger car according to claim 1, characterized in that: the inner and outer bearing rings are connected via elastic ring on the inner side of inner bearing ring, and the outer side of the joint of two inner bearing rings is provided with middle sealing ring.
3. The air pressure disc type rear axle assembly for the new energy passenger car according to claim 2, characterized in that: and a half shaft oil seal is arranged between the rear axle housing and the half shaft.
4. The air pressure disc type rear axle assembly for the new energy passenger car according to claim 1, characterized in that: the disc brake mounting bracket comprises a central part and two wing parts, wherein the central part of the disc brake mounting bracket is provided with a flange part for connecting an axle housing, the central part of the flange part is provided with a mounting positioning hole, a plurality of mounting through holes are uniformly distributed on the outer edge part of the flange part, two wing parts for connecting the disc brake are symmetrically arranged on two sides of the flange part, and each wing part is provided with a plurality of disc brake mounting holes; the central lines of the two wing parts and the central line of the flange part form an included angle (A), and the included angle (A) is 0-180 degrees.
5. The air pressure disc type rear axle assembly for the new energy passenger car according to claim 4, wherein: when the axle housing is axially observed, the two wing parts and the flange part form a triangular structure, and the two wing parts are opened towards the left side and the right side on the upper side of the flange part; viewed from top to bottom, the two wing portions lie in the same plane, with the flange portion projecting out of that plane.
6. The air pressure disc type rear axle assembly for the new energy passenger car according to claim 1, characterized in that: the main speed reducer with differential assembly comprises a main speed reducer shell, a driving gear, a driven gear and a differential; the differential comprises a differential shell, a half axle gear, a planetary gear and a planetary gear shaft; the main reducing gear casing passes through the bolt fastening on the rear axle housing, and the driving gear is connected with driving motor through installing the flange at its gear shaft axle head, and driven gear and driving gear meshing are connected, and differential mechanism casing passes through the bearing rotatable main reducing gear casing of locating and fixes on driven gear through the bolt, and planetary gear passes through the planetary gear axle to be fixed in differential mechanism casing, and planetary gear and half axle gear meshing are connected, and half axle gear passes through the splined connection semi-axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922288752.3U CN211166257U (en) | 2019-12-18 | 2019-12-18 | Air pressure disc type rear axle assembly for new energy passenger car |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922288752.3U CN211166257U (en) | 2019-12-18 | 2019-12-18 | Air pressure disc type rear axle assembly for new energy passenger car |
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| Publication Number | Publication Date |
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| CN211166257U true CN211166257U (en) | 2020-08-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922288752.3U Active CN211166257U (en) | 2019-12-18 | 2019-12-18 | Air pressure disc type rear axle assembly for new energy passenger car |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112297710A (en) * | 2020-11-19 | 2021-02-02 | 徐州徐工矿业机械有限公司 | Axle terminal brake mounting structure and mounting method of mining dump truck |
| CN113212061A (en) * | 2021-05-27 | 2021-08-06 | 山东浩信机械有限公司 | Hub assembly and assembling method thereof |
| CN113212061B (en) * | 2021-05-27 | 2024-11-12 | 山东浩信机械有限公司 | Hub assembly and assembly method thereof |
-
2019
- 2019-12-18 CN CN201922288752.3U patent/CN211166257U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112297710A (en) * | 2020-11-19 | 2021-02-02 | 徐州徐工矿业机械有限公司 | Axle terminal brake mounting structure and mounting method of mining dump truck |
| CN112297710B (en) * | 2020-11-19 | 2022-03-22 | 徐州徐工矿业机械有限公司 | Axle terminal brake mounting structure and mounting method of mining dump truck |
| CN113212061A (en) * | 2021-05-27 | 2021-08-06 | 山东浩信机械有限公司 | Hub assembly and assembling method thereof |
| CN113212061B (en) * | 2021-05-27 | 2024-11-12 | 山东浩信机械有限公司 | Hub assembly and assembly method thereof |
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