Electric drive axle with central disc brake
阅读说明:本技术 一种带中央盘式制动器的电驱动桥 (Electric drive axle with central disc brake ) 是由 杨朝会 韩振东 纪建奕 刘宗强 刘本友 马长城 纪玉龙 张晓峰 范圣磊 王顺 李 于 2020-08-12 设计创作,主要内容包括:本发明提出了一种带中央盘式制动器的电驱动桥,包括竖向设置的桥壳总成,所述桥壳总成的左右两端分别对称且转动设置有免维护轮端,所述桥壳总成前侧的中部固定设置有主减速器,所述主减速器与免维护轮端固定连接,所述主减速器的左侧固定设置有驱动电机,所述驱动电机与桥壳总成固定连接,所述主减速器的右侧的顶部固定设置有中央盘式制动器,所述主减速器的右端固定设置有中央制动盘,所述桥壳总成的顶部的一侧固定设置有气压平衡阀,借此,本发明具有能节省底盘布置空间,降低车辆自重的优点。(The invention provides an electric drive axle with a central disc brake, which comprises an axle housing assembly which is vertically arranged, wherein the left end and the right end of the axle housing assembly are respectively symmetrically and rotatably provided with a maintenance-free wheel end, the middle part of the front side of the axle housing assembly is fixedly provided with a main speed reducer, the main speed reducer is fixedly connected with the maintenance-free wheel end, the left side of the main speed reducer is fixedly provided with a driving motor, the driving motor is fixedly connected with the axle housing assembly, the top part of the right side of the main speed reducer is fixedly provided with the central disc brake, the right end of the main speed reducer is fixedly provided with a central brake disc, and one side of the top part of the axle housing assembly is fixedly provided with an air pressure balance valve.)
1. The utility model provides a take electric drive axle of central disk brake, a serial communication port, axle housing assembly including vertical setting, both ends are symmetrical respectively and are rotated and be provided with non-maintaining wheel end about the axle housing assembly, the fixed main reducer that is provided with in middle part of axle housing assembly front side, main reducer and non-maintaining wheel end fixed connection, the fixed driving motor that is provided with in left side of main reducer, driving motor and axle housing assembly fixed connection, the fixed central disk brake that is provided with in top on main reducer's right side, the fixed central brake disc that is provided with of main reducer's right-hand member, the fixed atmospheric pressure balance valve that is provided with in one side at the top of axle housing assembly.
2. The electric drive axle with the central disc brake as claimed in claim 1, wherein a drive motor fastening bracket is vertically and fixedly arranged on the left portion of the front side of the axle housing assembly, and the drive motor fastening bracket is fixedly connected with the left side of the drive motor.
3. The electric drive axle with the central disc brake as claimed in claim 1, wherein a left half shaft and a right half shaft are respectively arranged on the left side and the right side inside the axle housing assembly, wherein the left half shaft is fixedly connected with the maintenance-free wheel end at the left end, the right half shaft is fixedly connected with the maintenance-free wheel end at the right end, and the left half shaft and the right half shaft are both fixedly connected with the main speed reducer.
4. Electric drive axle with central disc brake according to claim 3, the main speed reducer comprises a speed reducer shell and a speed reducer end cover, the speed reducer end cover is fixedly arranged on the right side of the speed reducer shell, a shaft assembly is rotatably arranged in the reduction box shell, the left end of the shaft assembly is rotatably matched with the driving motor, the right end of the first shaft assembly penetrates out of the right side of the end cover of the reduction gearbox and is fixedly connected with the central brake disc, a gear at the bottom of the first shaft assembly is matched with a second shaft assembly, the rear side gear of the two-shaft assembly is matched with a differential mechanism with a driven wheel assembly, the two-shaft assembly is positioned in the reduction box shell, the left end and the right end of the two-shaft assembly are respectively in rotating fit with the left side wall of the reduction box shell and the end cover of the reduction box, the reduction box belt is located the axle housing assembly from the driving wheel assembly and both ends respectively with left semi-axis and right semi-axis fixed connection about it.
5. The electric drive axle with the central disc brake as claimed in claim 4, wherein the axle assembly comprises a transversely arranged axle and high-speed ball bearings fixedly arranged at the left and right parts of the axle, the left end of the axle is arranged to penetrate through the reduction box shell, the right end of the axle is arranged to penetrate through the reduction box cover, the left end of the axle is fixedly provided with an axle adjusting end cover, and the axle adjusting end cover is arranged inside the reduction box shell.
6. An electric drive axle with a central disc brake according to claim 5, characterized in that the left end of the shaft is provided with splines and is in spline fit with the driving motor, the right end of the shaft is provided with splines and is in spline fit with the central brake disc, the right end of the shaft is provided with threads, the right end of the shaft is fixedly provided with a lock nut, and the right end of the lock nut central brake disc is fixedly provided with a right end of the central brake disc.
7. The electric drive axle with the central disc brake as claimed in claim 5, wherein the two-axle assembly comprises a transversely arranged transmission shaft tooth, the transmission shaft tooth is engaged with a surface of one axle, a secondary gear is fixedly arranged at the right end of the transmission shaft tooth, high-speed cone bearings are fixedly arranged at the left end and the right end of the transmission shaft tooth respectively, wherein the outer ring of the high-speed cone bearing at the left side is fixedly connected with the left side wall of the reduction box shell, the outer ring of the high-speed cone bearing at the right side is fixedly provided with a two-axle adjusting end cover, and the two-axle adjusting end cover is fixedly connected with the reduction box end cover.
8. Electric drive axle with central disc brake according to claim 5, the differential mechanism belt driven wheel assembly comprises a driven bevel wheel meshed with the transmission shaft teeth, a differential mechanism left shell and a differential mechanism right shell are fixedly arranged on the left side and the right side of the driven bevel wheel respectively, the left end of the differential left shell and the right end of the differential right shell are respectively and fixedly provided with a differential bearing, a cross shaft is arranged between the left differential case and the right differential case, a planetary gear is fixedly arranged on the periphery of the cross shaft, the left side and the right side of the planet gear are respectively engaged with a sun gear, the left half shaft sequentially passes through the differential bearing on the left side, the left shell of the differential and the sun gear on the left side and is fixedly connected with the cross shaft, and the right half shaft sequentially penetrates through the differential bearing on the right side, the differential right shell and the sun gear on the right side and is fixedly connected with the cross shaft.
9. An electric drive axle with a central disc brake as claimed in claim 1, wherein said axle housing assembly has a strong magnet fixed therein.
Technical Field
The invention belongs to the technical field of axle braking, and particularly relates to an electric drive axle with a central disc brake.
Background
At present, with the implementation of national energy-saving and emission-reducing policies, new energy vehicles are vigorously implemented by the nation, new energy vehicles are gradually popularized, and the occupation ratio of new energy commercial vehicles is gradually increased. Most of the current commercial vehicles with new energy sources directly replace engines by driving motors. The transmission chain with the structure is too long, energy loss is large, the space of the chassis is occupied, the chassis arrangement of a power battery and a vehicle with a fixed scene is not facilitated, as shown in fig. 13, as shown in a patent CN103496320, basic functions of vehicle driving are simply realized through integration of a driving motor and an axle, and the device disclosed in the patent CN106976395A adopts a central drum brake at the front end of the power chain, the rotation of the driving motor drives a brake drum to rotate, and during braking, a friction plate expands outwards to generate braking force through friction with the brake drum, so that the parking function is realized.
At present, a chassis power system of a new-energy commercial vehicle is generally in a structure of a driving motor, a gearbox, a transmission shaft and a traditional drive axle, the structure occupies a large space, is not beneficial to arrangement of power batteries, and is heavy in weight and not beneficial to weight reduction of new-energy vehicles; the device of patent CN103496320 does not have a central parking function in function, adopts three-shaft two-stage speed reduction, adopts a vertical arrangement scheme for a shaft system, and the three shafts are coplanar, so that the cantilever length of a driving motor is increased, the moment of the joint surface of a main speed reducer and an axle housing is too large, and the axle housing is greatly deformed; the device described in patent CN106976395A is due to the manufacturing characteristics of the brake drum, the dynamic unbalance amount thereof is extremely difficult to be accurately controlled, and the high rotation speed of the driving motor will cause the brake drum to generate a large unbalanced centrifugal force in the rotation process, which causes the gear shaft to generate high frequency vibration, resulting in physical damage to the bearing and the gear.
Disclosure of Invention
The invention provides an electric drive axle with a central disc brake, which can save the arrangement space of a chassis and reduce the dead weight of a vehicle.
The technical scheme of the invention is realized as follows: the utility model provides a take electric drive axle of central disc brake, axle housing assembly including vertical setting, both ends are symmetrical respectively and are rotated and be provided with non-maintaining wheel end about the axle housing assembly, the fixed main reducer that is provided with in middle part of axle housing assembly front side, main reducer and non-maintaining wheel end fixed connection, the fixed driving motor that is provided with in left side of main reducer, driving motor and axle housing assembly fixed connection, the fixed central disc brake that is provided with in top on main reducer's right side, the fixed central brake disc that is provided with of right-hand member of main reducer, one side at the top of axle housing assembly is fixed and is provided with the atmospheric pressure balanced.
The driving motor drives the main reducer, the main reducer acts to drive the maintenance-free wheel ends at the two ends of the axle housing assembly, the functions of power output, bearing, braking and the like of the whole vehicle are realized through the electric drive axle, and through the integrated power system, the electric drive axle can effectively replace a chassis power system (motor-reduction gearbox-transmission shaft-drive axle) of the traditional electric vehicle, so that the chassis arrangement space is saved, and the self weight of the vehicle is reduced.
As a preferred embodiment, the left part of the front side of the axle housing assembly is vertically and fixedly provided with a driving motor fastening bracket, the driving motor fastening bracket is fixedly connected with the left side of the driving motor, and the driving motor is more firmly connected with the axle housing assembly through the driving motor fastening bracket.
As a preferred embodiment, a left half shaft and a right half shaft are respectively arranged on the left side and the right side inside the axle housing assembly, wherein the left half shaft is fixedly connected with a maintenance-free wheel end at the left end, the right half shaft is fixedly connected with a maintenance-free wheel end at the right end, both the left half shaft and the right half shaft are fixedly connected with a main speed reducer, a driving motor rotates to drive a first shaft assembly to rotate, a second shaft assembly is driven to rotate by the first shaft assembly, a differential gear is driven to rotate by the second shaft assembly, the differential gear drives the left half shaft and the right half shaft to rotate, the left half shaft is fixedly connected with the maintenance-free wheel end at the left end through bolts, and the right half shaft is fixedly connected with the maintenance-free wheel end at the right end through bolts, that is, the rotation.
As a preferred embodiment, the main speed reducer comprises a speed reducer shell and a speed reducer end cover, the speed reducer end cover is fixedly arranged on the right side of the speed reducer shell, a first shaft assembly is rotatably arranged in the speed reducer shell, the left end of the first shaft assembly is rotatably matched with a driving motor, the right end of the first shaft assembly penetrates out of the right side of the speed reducer end cover and is fixedly connected with a central brake disc, a second shaft assembly is matched with a bottom gear of the first shaft assembly, a rear gear of the second shaft assembly is matched with a differential gear assembly with a driven wheel, the second shaft assembly is arranged in the speed reducer shell, the left end and the right end of the second shaft assembly are respectively rotatably matched with the left side wall of the speed reducer shell and the speed reducer end cover, the speed reducer assembly with the driven wheel is arranged in the axle shell assembly, the left end and the right end of the first shaft assembly and the second shaft assembly are respectively and are fixedly connected with the left half axle and the right half axle, the first shaft assembly is fixed in the reducer shell through a bearing, one end of the first shaft assembly is inserted into a motor rotating shaft spline, the other end of the first shaft assembly penetrates through the end cover of the reducer box and is inserted into the central brake disc, and the first shaft assembly, the second shaft assembly and the differential mechanism are arranged in a triangular mode with a driven wheel, so that the height of the whole cantilever is reduced.
As a preferred embodiment, a shaft assembly comprises a shaft arranged transversely and high-speed ball bearings fixedly arranged on the left portion and the right portion of the shaft, the left end of the shaft penetrates through the gearbox shell, the right end of the shaft penetrates through the gearbox cover, a shaft adjusting end cover is fixedly arranged on the left end of the shaft and is arranged inside the gearbox shell, and the arrangement of the shaft adjusting end cover facilitates adjustment of a clearance between the shaft and the gearbox shell.
As a preferred embodiment, the left end of a shaft is provided with splines and is in spline fit with the driving motor, the right end of the shaft is provided with splines and is in fit with the central brake disc, the right end of the shaft is provided with threads, the right end of the shaft is fixedly provided with a locking nut, and the right end of the locking nut central brake disc is fixedly connected with the shaft and the central brake disc through the locking nut.
As a preferred embodiment, the two-shaft assembly comprises a transmission shaft tooth which is transversely arranged, the transmission shaft tooth is meshed with the surface of a shaft, a secondary gear is fixedly arranged at the right end of the transmission shaft tooth, high-speed conical bearings are fixedly arranged at the left end and the right end of the transmission shaft tooth respectively, wherein the outer ring of the high-speed conical bearing at the left side is fixedly connected with the left side wall of the reduction box shell, a two-shaft adjusting end cover is fixedly arranged on the outer ring of the high-speed conical bearing at the right side, the two-shaft adjusting end cover is fixedly connected with the reduction box end cover, and the adjustment of the clearance between the two-shaft assembly and the reduction box.
As a preferred embodiment, the differential mechanism with the driven wheel assembly comprises a driven bevel gear meshed with the transmission shaft gear, a differential mechanism left shell and a differential mechanism right shell are respectively and fixedly arranged on the left side and the right side of the driven bevel gear, differential mechanism bearings are respectively and fixedly arranged on the left end of the differential mechanism left shell and the right end of the differential mechanism right shell, a cross shaft is arranged between the differential mechanism left shell and the differential mechanism right shell, planetary gears are fixedly arranged on the periphery of the cross shaft, sun gears are respectively meshed on the left side and the right side of the planetary gears, a left half shaft sequentially penetrates through the differential mechanism bearings on the left side, the differential mechanism left shell and the sun gears on the left side and is fixedly connected with the cross shaft, a right half shaft sequentially penetrates through the differential mechanism bearings on the right side, the differential mechanism right shell and the sun gears on the right side and, the differential mechanism is driven by the two-shaft assembly to rotate, the differential mechanism drives the left half shaft and the right half shaft to rotate, the half shafts are fixedly connected with the wheel ends through bolts, namely the rotation of the half shafts drives the rotation of the conclusion, and the motion of the whole vehicle is realized.
As a preferred implementation mode, a powerful magnet is fixedly arranged in the axle housing assembly and mainly used for adsorbing impurities such as scrap iron mixed in gear oil, the cleanliness of the gear oil is improved, and the performance of a transmission system and a bearing is guaranteed.
After the technical scheme is adopted, the invention has the beneficial effects that:
1. a central disc brake is arranged at the front end of the power chain, a wheel end parking structure is cancelled, the parking capacity is improved, and the self weight is reduced;
2. each shafting adopts an adjusting end cover to carry out axial clearance adjustment;
3. the shafting adopts the triangle arrangement scheme, reduces the volume of the power system, reduces the length of the cantilever and increases the oil infiltration depth of the gear.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the structure of FIG. 1 from another view angle;
FIG. 3 is a schematic diagram of the exploded structure of FIG. 2;
FIG. 4 is a schematic structural view of the axle housing assembly of FIG. 3 with the axle housing removed;
FIG. 5 is a schematic illustration of the final drive of FIG. 3;
FIG. 6 is a schematic view of the structure of FIG. 5 from another perspective;
FIG. 7 is a schematic view of a structure in which a primary shaft assembly, a secondary shaft assembly, and a differential belt driven wheel assembly are engaged;
FIG. 8 is a schematic view of the structure of FIG. 7 from another perspective;
FIG. 9 is a schematic view of the structure of FIG. 8 from another perspective;
FIG. 10 is a schematic structural view of a two-axis assembly;
FIG. 11 is a schematic view of a shaft assembly;
FIG. 12 is a schematic diagram of the differential with driven wheel assembly;
FIG. 13 is a schematic structural diagram of the prior art;
FIG. 14 is a schematic view of a wheel-side brake configuration;
FIG. 15 is a wheel side braking schematic;
FIG. 16 is a schematic diagram of the EMB braking principle;
FIG. 17 is a schematic view of the overall structure of the electric drive axle;
FIG. 18 is a schematic view of an adjusting ring structure;
FIG. 19 is a triangular relationship view of a primary shaft assembly, a secondary shaft assembly, and a differential with a driven wheel assembly;
FIG. 20 is a schematic diagram of a bridge drive test configuration.
In the drawings, 1-axle housing assembly; 2-maintenance free wheel end; 3-a main reducer; 4-driving the motor; 5-a central disc brake; 6-a central brake disc; 7-air pressure balance valve; 8, driving a motor fastening bracket; 11-left half shaft; 12-right half shaft; 13-a powerful magnet; 31-a reduction box shell; 32-reduction gearbox end cover; 33-a shaft assembly; 34-a two-axis assembly; 35-differential with driven wheel assembly; 331-one axis; 332-high speed ball bearings; 333-one axis adjusting end cap; 334-a locking nut; 341-transmission shaft teeth; 342-a secondary gear; 343-high speed cone bearings; 344-two-axis adjustment end cap; 351-driven bevel gear; 352-differential left case; 353-the right differential case; 354-differential bearings; 355-a cross-shaft; 356-planetary gear; 357-sun gear.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1-20, an electric drive axle with central disc brake, axle housing assembly 1 including vertical setting, both ends are symmetrical respectively and are rotated and are provided with
The driving motor 4 drives the main reducer 3, the main reducer 3 acts to drive the maintenance-
The left part of axle housing assembly 1 front side is perpendicular and fixed is provided with driving motor fastening support, and driving motor fastening support and driving motor 4's left side fixed connection make the connection between driving motor 4 and the axle housing assembly 1 more firm through setting up of driving motor fastening support. The left side and the right side inside the axle housing assembly 1 are respectively provided with a left half shaft 11 and a right half shaft 12, wherein the left half shaft 11 is fixedly connected with a maintenance-
The main reducer 3 comprises a
The first shaft assembly 33 comprises a
The differential driven
By integrating the power system, the electric drive axle can effectively replace a chassis power system (motor-reduction gearbox-transmission shaft-drive axle) of the traditional electric vehicle, so that the layout space of the chassis is saved, and the self weight of the vehicle is reduced; a brand new speed reducer shafting arrangement scheme is designed, the longitudinal length of the gravity center of the assembly is reduced, and the problem of system deformation caused by overlong motor cantilevers is solved; the central disc brake 5 is arranged at the front section of the transmission chain, so that a brake device at the tail end of the power chain can be effectively replaced, the requirement of the whole vehicle can be met through small brake torque, the parts and the weight of a brake system are reduced, and the light weight is realized; the central disc type brake solves the problem that the brake drum unbalance amount in a drum type brake device is difficult to control, and the integral reliability of the system is improved.
The chassis power system is integrally designed, and the functions of power output, bearing, braking and the like of the whole vehicle are realized through the electric drive axle; on the basis of a patent CN103496320, the reliability of the device is improved, the maintainability and the stable and reliable central parking system are realized through a brand-new design of shafting arrangement, a bearing clearance adjusting structure and a central brake, and on the basis of a patent CN106976395A, the central parking system is designed in a brand-new manner, so that the problem of poor system stability caused by dynamic unbalance of a brake device in the high-speed rotation process of a motor of the central parking system is solved; the central disc type parking brake adopts an EPB (electric park brake) device to realize the electronic parking brake (P-gear parking) function of the electric drive bridge; the wheel end service braking system can adopt EMB (electro mechanical brake) to realize electromechanical braking, thereby eliminating a high-pressure oil path, an air path and related devices and reducing the cost of the whole vehicle.
The main structure of the electric drive axle comprises a drive motor 4, a main speed reducer 3, an axle housing assembly 1, a central disc brake 5 and a maintenance-
The front end of the transmission chain is adopted for braking, so that the size and the weight of a braking system are effectively reduced, and the braking force is improved. The speed ratio selectable range of the main speed reducer 3 of the product is 10-18, taking 3.5T electric drive bridge as an example, the specification of a brake adopted by wheel end parking is phi 320 multiplied by 100, the achievable braking force is single-side 3100Nm (hydraulic brake), the total braking force is 6200Nm, and the required braking torque is only 344 and 620Nm (6200 divided by the speed ratio) by adopting a center parking brake. Compared with a central drum brake, the central drum brake is formed by casting spherical iron and needs to be connected to a
The interior of the main speed reducer 3 is subjected to three-shaft two-stage speed reduction, one end of a shaft assembly 33 is fixed in the speed reducer shell through one end of a
The shaft assembly 33 mainly comprises a
A central disc brake 5 is arranged at the front end of the power chain, a wheel end parking structure is cancelled, the parking capacity is improved, and the self weight is reduced; each shafting adopts an adjusting end cover to carry out axial clearance adjustment; the shafting adopts a triangular arrangement scheme, so that the volume of a power system is reduced, the length of a cantilever is reduced, and the oil infiltration depth of the gear is increased; the
The power structure of the electric drive axle relative to the conventional electric drive vehicle is explained by the following points: the power structure of the traditional new energy vehicle is as follows: the driving motor 4+ the gearbox + the transmission shaft + the traditional drive axle generates power through the driving motor 4, the vehicle is driven to run through the gearbox, the transmission shaft and the traditional drive axle, and a power chain is long; the power structure of the product of the invention is an integrated design of a driving motor 4 and a driving axle, the electric driving axle integrates the driving motor 4, the electric driving axle directly drives the vehicle to run, and the power chain is short:
taking a logistics vehicle with GVW of 4.5T as an example, the weight of the two power structures is compared as follows:
driving motor 4+ gearbox + transmission shaft + traditional transaxle structure, each part weight is as follows:
the driving motor 4: 40kg of
A gearbox: 66kg of
A transmission shaft: 22kg of
The traditional drive axle is as follows: 196kg
Accessories: 7kg of
The total weight is as follows: 331kg of
Electric drive axle weight: 296kg
The difference between the two structures is 35kg, and compared with the traditional structure, the weight of the electric drive bridge is reduced by nearly 11%.
2. Comparison of production process of
After a
the central drum is formed by direct casting, only the inner surface is processed, and the dynamic unbalance amount is about 250 g.cm.
The central disk type can better ensure the impact on a shaft system in the rotating process and the stable performance.
3. Wheel edge braking structure and principle
The wheel hydraulic braking structure schematic diagram mainly comprises a brake cylinder, a left shoe, a right shoe, a friction plate and a brake drum, wherein push rods are arranged on the left side and the right side of the brake cylinder and are respectively connected with the brake shoes on the left side and the right side, and the brake shoes and the friction plate are connected in a riveting mode and fixed into a whole.
During braking, the whole vehicle high-pressure oil pump injects hydraulic oil into the wheel cylinder through the brake oil inlet, the hydraulic oil pushes the left piston and the right piston in the brake wheel cylinder to move towards two sides, namely the push rod moves towards two sides, and the push rod is connected with the left shoe and the right shoe, so that the left shoe and the right shoe are driven to open towards two sides, the friction plates are in contact with the friction plates of the brake drum, friction force is generated, and the whole vehicle brake is realized.
The EMB braking principle: the EMB braking and the hydraulic braking are mainly different in braking force source, the hydraulic braking generates braking force through hydraulic oil, and the EMB generates braking force by adopting a braking motor;
the EMB has the advantages that: the hydraulic brake needs to install a whole set of hydraulic system on the whole vehicle, and has large volume and high cost; the EMB requires only a conventional 24V power supply to achieve braking.
The structure is as follows: the main structure of the brake device consists of a brake motor, a motor shaft, a turbine, a worm and a push rod, and the rest of the brake structure chart is the same as the brake structure chart of the wheel end. The working principle is as follows: during braking, the brake motor operates to drive the output shaft to rotate, so that the turbine connected with the output shaft is driven to rotate, the turbine drives the worm to rotate, the worm is connected with the push rod into a whole, the push rod moves left and right, the friction plate is driven to be opened, and the friction plate and the brake drum generate friction, so that the braking of the whole vehicle is realized. (note: the worm gear of the EMB system realizes speed reduction and torque increase, the part is not limited to the worm gear structure, and can also adopt a gear set to realize speed reduction and torque increase)
The driving motor 4 rotates to drive the first shaft assembly 33 to rotate, the
The magnet adopts powerful neodymium magnet, and the main effect is for adsorbing impurity such as iron fillings that mix in the gear oil, promotes the cleanliness of gear oil, guarantees the performance of transmission system and bearing. The first shaft assembly 33 and the
The shafting of the invention is arranged in a triangle, so that the occupied space is saved in space, the length of the cantilever is reduced in stress due to the formed triangular support, and the suspension moment of the main speed reducer 3 is reduced. The system has good rigidity and stable overall performance, and a triangular relation view is shown in figure 7: however, the shafting arrangement according to the patent is that the centers of the three shafts are on the same straight line, the occupied space is large, and the main reducer 3 has a long cantilever, which is not favorable for the stability of the system.
Demolish driving motor 4 of electronic axle, replace the electromechanical machine of dynamometer and drive axle driving motor 4, for driving the axle and providing power, both sides wheel end loading, test condition: the output torque is 7000Nm, the output speed per hour is 30Km/h, the lubricating oil is 85W-90, and the mechanical efficiency of the electric drive bridge reaches 97.6 percent when the thermal equilibrium temperature of the lubricating oil reaches 90 ℃. By consulting the relevant materials, the mechanical efficiency is higher than that of the electric drive axle of the structure in the reference patent.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. In the description of the present invention, unless otherwise specified and limited, it is to be noted that the terms "mounted," "connected," and "connected" are to be interpreted broadly, and may be, for example, a mechanical connection or an electrical connection, a communication between two elements, a direct connection, or an indirect connection via an intermediate medium, and specific meanings of the terms may be understood by those skilled in the art according to specific situations.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
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