CN108016288B - Electric vehicle axle - Google Patents
Electric vehicle axle Download PDFInfo
- Publication number
- CN108016288B CN108016288B CN201710853682.4A CN201710853682A CN108016288B CN 108016288 B CN108016288 B CN 108016288B CN 201710853682 A CN201710853682 A CN 201710853682A CN 108016288 B CN108016288 B CN 108016288B
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- rotating shaft
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- axle
- hub
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- 238000009434 installation Methods 0.000 claims abstract description 29
- 239000006096 absorbing agent Substances 0.000 claims description 33
- 230000035939 shock Effects 0.000 claims description 33
- 230000007246 mechanism Effects 0.000 claims description 13
- 230000000694 effects Effects 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 description 16
- 238000000034 method Methods 0.000 description 7
- 230000035882 stress Effects 0.000 description 5
- 230000009467 reduction Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006355 external stress Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K7/00—Disposition of motor in, or adjacent to, traction wheel
- B60K7/0007—Disposition of motor in, or adjacent to, traction wheel the motor being electric
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B35/00—Axle units; Parts thereof ; Arrangements for lubrication of axles
- B60B35/002—Axles of the low floor type, e.g. for low-floor city busses
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G9/00—Resilient suspensions of a rigid axle or axle housing for two or more wheels
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T1/00—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles
- B60T1/02—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels
- B60T1/06—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels acting otherwise than on tread, e.g. employing rim, drum, disc, or transmission or on double wheels
- B60T1/065—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels acting otherwise than on tread, e.g. employing rim, drum, disc, or transmission or on double wheels employing disc
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2200/00—Indexing codes relating to suspension types
- B60G2200/30—Rigid axle suspensions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2200/00—Indexing codes relating to suspension types
- B60G2200/40—Indexing codes relating to the wheels in the suspensions
- B60G2200/422—Driving wheels or live axles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
- B60G2202/10—Type of spring
- B60G2202/15—Fluid spring
- B60G2202/152—Pneumatic spring
- B60G2202/1524—Pneumatic spring with two air springs per wheel, arranged before and after the wheel axis
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K7/00—Disposition of motor in, or adjacent to, traction wheel
- B60K2007/0092—Disposition of motor in, or adjacent to, traction wheel the motor axle being coaxial to the wheel axle
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
Abstract
The electric vehicle axle comprises an axle main body, a brake, a motor, a hub and a wide-base single-tire rim, wherein upright posts are arranged at two ends of the axle main body, and motor mounting positions are arranged at the outer side of each upright post; the motor comprises a shell, a stator coil, a rotor coil and a motor rotating shaft, wherein the shell is arranged on a motor installation position, the stator coil is fixed on the shell, the motor rotating shaft is rotatably fixed on the shell, and the rotor coil is fixed with the rotating shaft; the inner circular surface of the hub is connected with the outer side end of the motor rotating shaft through a spline, and the outer circular surface is supported on the inner edge of the motor shell through two tapered roller bearings; the wide-base single-tire rim is fixed with the hub; the axes of the motor rotating shaft, the hub and the rim are coincident, and the axis of the motor rotating shaft is parallel to the plane of the axle main body plate type structure. The electric vehicle axle can improve the service life and the reliability of the motor and reduce the height of the floor of the carriage.
Description
Technical Field
The application relates to the technical field of vehicles, in particular to an electric vehicle axle.
Background
The transmission system of the existing vehicle is installed at the bottom of the vehicle and comprises: the gearbox, the transmission shaft and the drive axle have the obvious defects of complex structure and low transmission efficiency because of longer transmission chain.
At present, most of axles adopted by electrically driven buses are electrically modified by traditional axles. In the existing electric axle structure, the motor rotating shaft is usually connected with the wheel shaft through a speed reducer, and the stress of the wheel is mainly transmitted to the wheel shaft, so that a motor shaft connected with the wheel shaft is deformed, and the service life and reliability of the motor are inevitably reduced.
Moreover, the traditional axle has a plurality of transmission parts, and more transmission parts occupy larger arrangement space, and the compactness is poor, so that the space occupation rate is very low, the internal space of a passenger car is reduced, and the floor height of the passenger car is increased. For short-distance transport vehicles with a large number of standing passengers, such as urban electric buses, the time for passengers to get on and off is reduced, convenience for passengers to get on and off is also provided, the gravity center of the passengers is lower due to the fact that the floor height is reduced, forward-leaning and backward-leaning can be reduced when the passengers start to accelerate or brake, and riding comfort can be improved. Thus, low cabin floor of a vehicle is an important feature of an electric bus.
How to effectively improve the service life and reliability of the motor in the electric vehicle axle and reduce the height of the carriage floor of the vehicle becomes a technical problem to be solved by the person skilled in the art.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention provides the electric axle, which can effectively improve the service life and the reliability of a motor through the innovative structural arrangement of the electric axle, and further reduce the height of the carriage floor of a vehicle using the electric axle.
To this end, the present application discloses an electric vehicle axle comprising: an axle main body, a brake, a motor, a hub and a wide base single tire rim, wherein,
the axle main body is of a plate type structure, upright posts are arranged at two ends of the axle main body, and motor mounting positions are arranged on the outer side of each upright post;
the motor includes: the motor comprises a shell, a stator coil, a rotor coil and a motor rotating shaft, wherein the shell is arranged on a motor installation position at any end of the axle main body, the stator coil is fixed on the inner wall of the shell, the motor rotating shaft is rotatably fixed on the shell, the rotor coil is fixed with the motor rotating shaft, and the stator coil surrounds the rotor coil;
the inner circular surface of the hub is connected with the outer side end of the motor rotating shaft through a spline, and the outer circular surface is supported on the inner edge of the motor shell through two tapered roller bearings; the wide base single tire rim is fixed with the hub; the motor rotating shaft, the hub and the axis of the wide base single tire rim are overlapped, and the axis of the motor rotating shaft is parallel to the plane where the axle main body plate type structure is located.
Optionally, the method further comprises: the brake chamber, the pneumatic actuating mechanism, the brake caliper and the brake disc, wherein,
the brake air chamber stores high-pressure air;
the brake disc is fixed with the inner side end of the motor rotating shaft;
the brake calipers are movably arranged on the upright posts, the positions of the brake calipers correspond to those of the brake discs, and the brake calipers are separated from the brake discs;
the pneumatic actuating mechanism is connected with the brake caliper; the brake air chamber is communicated with the pneumatic actuating mechanism through an air passage pipeline, high-pressure air in the brake air chamber drives the pneumatic actuating mechanism, the pneumatic actuating mechanism pushes the brake calipers to squeeze the brake disc, and friction force between the brake disc and the brake calipers decelerates a motor rotating shaft connected with the brake disc.
Optionally, the motor installation position is a plurality of threaded holes arranged on the upright post, and the plurality of threaded holes are distributed in an annular arrangement;
the shell is provided with a plurality of threaded holes which are in one-to-one correspondence with the threaded holes on the upright post;
the shell is fixed on the motor installation position through bolts and threaded holes.
Optionally, the housing is provided with a first mounting hole and a second mounting hole, wherein,
the first mounting hole is close to the upright post, and the second mounting hole is close to the hub;
the motor rotating shaft is rotationally connected with the first mounting hole through a single-row ball bearing; the hub is rotationally connected with the second mounting hole through two tapered roller bearings.
Optionally, a cavity is formed in the wide base single tire rim;
the hub is arranged on one end face of the cavity, and the wide base Shan Tai rim and the hub are matched to form a concave installation space;
the motor rotating shaft penetrates through the installation space and is fixed with the hub;
the motor shell is positioned in the installation space, and a gap is reserved between the outer wall of the shell and the inner wall of the installation space.
Optionally, the motor rotating shaft is fixed with the hub through a first spline;
two ends of the motor rotating shaft, which are positioned in the shell, are respectively provided with a second spline;
the motor rotating shaft is connected with the rotor coil through two second splines, and a gap is reserved between the motor rotating shaft and the rotor coil.
Optionally, either end of the axle body further comprises two shock absorber brackets, wherein,
one end of the shock absorber support is fixed on the side face of the upright post, and a shock absorber support is arranged on the end part of the other end of the shock absorber support;
the shock absorber support is provided with a shock absorber installation position for installing a shock absorber;
an air spring support is arranged on the connecting arm of the shock absorber bracket;
an air spring mounting position is arranged on the air spring support;
the two shock absorber brackets are fixed on the upright post, and the two shock absorber brackets are respectively positioned at two sides of the axis of the motor rotating shaft.
Optionally, a hollowed hole is arranged in the plate-type structure of the axle main body; the hollow holes in the axle main body are symmetrically distributed.
Optionally, the two ends of the axle main body also respectively comprise a longitudinal pull rod, wherein,
the two longitudinal pull rods are symmetrically distributed on the upright post;
the first end of the longitudinal pull rod is arranged on the side surface of the upright post, and the position of the first end of the longitudinal pull rod is close to the position of the motor;
the longitudinal pull rod is perpendicular to the side face of the upright post;
the second end of the longitudinal pull rod is provided with a fixing position for being fixed with the frame.
Optionally, the electric vehicle axle further comprises a first diagonal draw bar and a second diagonal draw bar, wherein,
one end of the first diagonal draw bar and one end of the second diagonal draw bar are both arranged at the center of the side face of the axle main body;
the first diagonal draw bar and the second diagonal draw bar are distributed in a V shape;
the other end of the first diagonal draw bar and the other end of the second diagonal draw bar are both provided with fixing positions for fixing with a frame.
According to the electric vehicle axle, as the shell of the motor is directly arranged on the motor installation position of the vehicle axle main body, the motor rotating shaft is rotatably fixed on the shell, the inner circular surface of the hub is connected with the outer side end of the motor rotating shaft through a spline, and the outer circular surface is supported on the inner edge of the shell of the motor through two tapered roller bearings; the wide-base single-tire rim is fixed with the hub, so that by utilizing the structure, the stator coil and the rotor coil of the motor are interacted to enable the motor rotating shaft to rotate, so that the hub connected with the motor rotating shaft through the spline is driven to rotate, and further the wide-base single-tire rim fixed on the hub is driven to rotate, and finally the wide-base single-tire wheel arranged on the wide-base single-tire rim is enabled to rotate, and the running of a vehicle is realized. In this structure, the motor shaft is separated from the wheel shaft, so that the stress of the wheel is mainly transmitted to the housing and the axle main body of the motor, and only a small amount of stress of the wheel is transmitted to the motor shaft, thereby improving the service life and reliability of the motor.
In addition, this electric vehicle axle that this application provided, because the shell direct mount of motor is in the axle main part, the motor shaft of motor is connected with wheel hub through the spline directly to the wide base single child rim that the drive is connected with wheel hub rotates, and this kind of transmission mode directly utilizes motor shaft drive tire, need not to install traditional vehicle axle's transmission part, has reduced the space that power transmission process and power transmission part occupy, so this axle whole height can reduce, and then makes the carriage floor height reduction of the vehicle that adopts this axle. The height of the carriage floor is reduced, so that the time for passengers to get on or off the carriage can be reduced, and the passengers can get on or off the carriage more conveniently. In addition, this electric vehicle axle that this application provided, because the shell of motor is direct to be installed on the motor installation position of axle main part, motor shaft rotationally fixes on the shell, and the hub inner circle face passes through spline connection with the outside end of motor shaft, the outer disc passes through two tapered roller bearing and supports the inner edge at the shell of motor, wide base single child rim is fixed with the wheel hub mutually, the axis of motor shaft, wheel hub and wide base single child rim coincides mutually, consequently through above structure, make the wheel fix on the wheel hub on the stand of axle main part, thereby the height of axle main part from the ground is less than the height of wheel axis from the ground, and then make the height on carriage floor further reduce, and make the interior space increase. The further reduction of carriage floor height can also make passenger's focus reduce, can reduce forward stroke and lean back when vehicle start acceleration or braking, has improved the travelling comfort of riding.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.
In order to more clearly illustrate the technical solutions in the embodiments or in the background of the present application, the drawings that are needed in the description of the embodiments or in the background of the present application will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.
FIG. 1 is a schematic top view of an electric axle provided herein;
FIG. 2 is a rear view of an electric axle provided herein;
fig. 3 is a schematic partial cross-sectional view of an electric vehicle axle provided herein.
Detailed Description
In order to better understand the technical solutions in the present application, the following description will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, shall fall within the scope of the present application.
Fig. 1 is a schematic top view of an electric vehicle axle according to an embodiment of the present application. Fig. 2 is a rear view of an electric vehicle axle provided in an embodiment of the present application. Fig. 3 is a schematic partial cross-sectional view of an electric vehicle axle according to an embodiment of the present application.
As shown in fig. 1, 2 and 3, the electric vehicle axle includes: the connection of the motor 1, brake, axle body 10, hub 18 and wide base Shan Tai rim 12 is described below.
The axle main body 10 is plate type structure, the both ends of axle main body all are provided with stand 100, and the outside of every stand 100 all is provided with the motor installation position.
The motor 1 includes: the motor comprises a shell 13, a stator coil 14, a rotor coil 15 and a motor rotating shaft 17, wherein the shell 13 is arranged on a motor installation position at any end of the axle main body 10, the stator coil 14 is fixed on the inner wall of the shell 13, the motor rotating shaft 17 is rotatably fixed on the shell 13, the rotor coil 15 is fixed with the motor rotating shaft 17, and the stator coil 14 surrounds the rotor coil 15.
To facilitate the disassembly of the motor, in the present embodiment, the housing 13 is detachably fixed to the motor mounting position.
The inner circular surface of the hub 18 is connected with the outer side end of the motor rotating shaft 17 through a spline, and the outer circular surface is supported on the inner edge of the motor shell 13 through two tapered roller bearings 16. The motor shaft 17 has an inner end at an end close to the column 100 and an outer end at an end far from the column 100.
The wide base Shan Tai rim 12 is secured to the hub 18. In addition, the axis of the motor rotating shaft, the axis of the hub and the axis of the wide base single tire rim are overlapped, the axis of the motor rotating shaft is parallel to the plane where the axle main body plate type structure is located, and a space is arranged between the motor rotating shaft and the axis of the wide base single tire rim. The axes of the hub and the wide base single tire rim are the wheel axes.
In this embodiment of the present application, the wide base Shan Tai rim 12 may be provided with the wide base Shan Tai wheel 2, so that the wide base single tire rims on two sides of the axle main body 10 are respectively one, and the wide base single tire rim is mainly characterized by flattening and tubeless, compared with a dual-tire structure assembled by common tires, the wide base single tire rim has wider form and stronger bearing capacity, and is matched with the bearing size of the axle main body, and the integral structure thereof enables the axle to bear the weight of 6-8 tons, and also enables the inside of the wheel to have a larger space for installing a high-power hub motor, thereby providing abundant power. In addition, the rolling resistance is smaller, the weight is lighter than that of the double tires combined, and the running economical performance is enhanced.
In addition, as can be seen from fig. 2 and 3, the height of the axle body 10 from the ground is smaller than the height of the wheel axis from the ground, so that the height of the cabin floor can be greatly reduced when the electric axle is used.
According to the electric vehicle axle provided by the embodiment of the application, as the shell of the motor is directly arranged on the motor installation position of the vehicle axle main body, the motor rotating shaft is rotatably fixed on the shell, the inner circular surface of the hub is connected with the outer side end of the motor rotating shaft through a spline, and the outer circular surface is supported on the inner edge of the shell of the motor through two tapered roller bearings; the wide-base single-tire rim is fixed with the hub, so that by utilizing the structure, the stator coil and the rotor coil of the motor are interacted to enable the motor rotating shaft to rotate, so that the hub connected with the motor rotating shaft through the spline is driven to rotate, and further the wide-base single-tire rim fixed on the hub is driven to rotate, and finally the wide-base single-tire wheel arranged on the wide-base single-tire rim is enabled to rotate, and the running of a vehicle is realized. In this structure, the motor shaft and the wheel shaft can be separated, so that the stress of the wheel is mainly transmitted to the housing and the axle main body of the motor, and only a small amount of stress of the wheel is transmitted to the motor shaft, thereby improving the service life and reliability of the motor.
In addition, this electric vehicle axle that this application embodiment provided, because the shell of motor is direct to be installed in the axle main part, the motor pivot of motor is connected with wheel hub through the spline directly to the wide base single child rim that the drive is connected with wheel hub rotates, and this kind of transmission mode directly utilizes motor pivot drive tire, need not to install traditional vehicle axle's transmission part, has reduced the space that power transmission process and power transmission part occupy, so this vehicle axle overall height can reduce, and then makes the carriage floor height reduction of the vehicle that adopts this vehicle axle. The height of the carriage floor is reduced, so that the time for passengers to get on or off the carriage can be reduced, and the passengers can get on or off the carriage more conveniently.
In addition, this electric vehicle axle that this application embodiment provided, because the shell of motor is direct to be installed on the motor installation position of axle main part, motor shaft rotationally fixes on the shell, and the wheel hub internal circle face passes through spline connection with the outside end of motor shaft, the external circle face passes through two tapered roller bearing and supports the inner edge at the shell of motor, wide base single child rim is fixed with the wheel hub mutually, the axis (i.e. the wheel axis) of motor shaft, wheel hub and wide base single child rim coincides mutually, consequently through above structure, make the wheel fix on the stand in the axle main part, thereby the height of axle main part from the ground is less than the height of wheel axis from the ground, and then make the height on carriage floor further reduce, and make the interior space increase. The further reduction of carriage floor height can also make passenger's focus reduce, can reduce forward stroke and lean back when vehicle start acceleration or braking, has improved the travelling comfort of riding.
In addition, as the power part for transmission is omitted, the transmission efficiency can be improved, and the energy loss is reduced.
In one embodiment of the present application, the electric vehicle axle may further include a brake chamber 9, a pneumatic actuator 8, a brake caliper (not shown), and a brake disc 21.
In the embodiment of the application, the brake disc 21 is fixed with the inner side end of the motor rotating shaft 17 through the flange 11, and the rotating speed of the motor rotating shaft 17 can be limited by limiting the rotation of the brake disc 21, so that a braking effect is achieved. The brake disc 21 is typically made of a wear resistant material to improve brake life.
The brake calipers are movably arranged on the upright post, but cannot rotate with the upright post, the positions of the brake calipers and the brake disc correspond to each other, and a gap is reserved between the brake calipers and the brake disc. Thus, when the brake caliper presses the brake disc, friction force can be generated between the brake caliper and the brake disc, and as the pressing force is increased, the generated friction force is also larger. However, the brake calipers and the upright columns cannot rotate, so that the friction force can reduce the rotating speed of the brake disc, and then the rotating speed of the rotating shaft of the motor is driven to be reduced, so that the purpose of braking is realized.
In this application embodiment, as shown in fig. 2, the brake chamber is installed in the top of brake disc to the high-pressure gas is stored to the brake chamber, and in addition, pneumatic actuating mechanism is connected with brake caliper, in this application embodiment, the brake chamber through the gas circuit pipeline with pneumatic actuating mechanism is linked together, the high-pressure gas drive in the brake chamber pneumatic actuating mechanism, pneumatic actuating mechanism promotes brake caliper extrusion brake disc, the brake disc with the frictional force of brake caliper will with the motor pivot that the brake disc is connected slows down.
In one embodiment of the present application, the motor installation position is a plurality of threaded holes arranged on the side surface of the upright post, and the plurality of threaded holes are distributed in an annular arrangement; the shell is provided with a plurality of threaded holes which are in one-to-one correspondence with the threaded holes on the upright post; the housing is secured to the motor mounting location by bolts 19 and threaded holes.
In one embodiment of the application, a first mounting hole and a second mounting hole are formed in the shell, wherein the first mounting hole is close to the upright, and the second mounting hole is close to the hub; the motor shaft is rotatably connected with the first mounting hole through a single-row ball bearing 20, and the single-row ball bearing 20 is used for supporting the rotor and rotating. The hub 18 is rotatably connected to the second mounting hole by two tapered roller bearings 16. When the vertical load on the wheel is transferred to the rim 12, a moment is generated which acts on the hub 18 and is transferred to the motor housing 13 via the two tapered roller bearings, where the external stress of the motor shaft 17 is significantly reduced. Two tapered roller bearings 16 are arranged on the outer side of the shell 13, and a single-row ball bearing 20 is arranged on the inner side of the shell, so that on one hand, axial force can be counteracted, and on the other hand, the rotation precision of the motor rotating shaft 17 can be ensured. In order to prevent hidden trouble caused by deformation of the rotating shaft 17 when the rotating shaft is subjected to bending moment, the spline at the middle section of the rotating shaft of the motor is divided into two narrower sections, a certain gap is reserved between the middle section of the rotating shaft and the rotor, and the influence of slight deformation of the rotating shaft on the rotor precision can be counteracted.
In one embodiment of the present application, as shown in fig. 3, a cavity is provided inside the wide base single tire rim; the hub is arranged on one end face of the cavity, and the wide base Shan Tai rim and the hub are matched to form a concave installation space; the motor rotating shaft penetrates through the installation space and is fixed with the hub; the motor shell is positioned in the installation space, and a gap is reserved between the outer wall of the shell and the inner wall of the installation space.
In one embodiment of the present application, the motor shaft is fixed to the hub through a first spline; two narrower second splines are respectively arranged at the middle section of the motor rotating shaft in the shell; the motor rotating shaft is connected with the rotor coil through the two second splines, and a gap is formed between the rotor coil and a part of the motor rotating shaft between the second splines, and the gap can allow the motor rotating shaft 17 to slightly deform and does not influence the normal operation of the motor.
In one embodiment of the present application, either end of the axle body further includes two shock absorber brackets 7. In practical application, two shock absorber brackets 7 are respectively installed at two ends of the axle main body, and the shock absorber brackets 7 installed at two ends of the axle main body are symmetrically distributed.
One end of the shock absorber bracket 7 is fixed on the front side surface and the rear side surface of the upright post, and a shock absorber support 3 is arranged on the end part of the other end; the shock absorber support 3 is provided with a shock absorber installation position for installing a shock absorber; an air spring support 4 is arranged on the connecting arm of the shock absorber support, and the air spring support 4 is arranged on the inner side of the shock absorber support 3 and is fixed on the shock absorber support 7; an air spring mounting position is arranged on the air spring support 4. The two shock absorber brackets 7 are fixed on the upright posts, and the two shock absorber brackets 7 are respectively positioned at two sides of the axis of the motor rotating shaft.
In one embodiment of the present application, a hollowed hole is provided in the plate-shaped structure of the axle main body; the hollow holes in the axle main body are symmetrically distributed. Alternatively, as shown in fig. 1, the axle body is a frame structure shaped like a Chinese character 'ri' in a plan view. The overlook angle of axle main part adopts "day" style of calligraphy frame main part structure, and lightweight design, bearing capacity is stronger.
In one embodiment of the present application, two ends of the axle main body further respectively include a longitudinal tie 5, where two longitudinal ties 5 are symmetrically distributed on the axle main body; the first end of the vertical pull rod 5 is arranged on the side surface of the upright post, and the position of the first end of the vertical pull rod 5 is close to the position of the motor; the longitudinal pull rod 5 is perpendicular to the side surface of the upright post; the second end of the longitudinal rod 5 is provided with a fixing position for fixing with the frame.
In one embodiment of the application, the electric vehicle axle further comprises two diagonal rods 6, specifically a first diagonal rod and a second diagonal rod, wherein one end of the first diagonal rod and one end of the second diagonal rod are both installed at the center position of the side face of the axle main body; the first diagonal draw bar and the second diagonal draw bar are distributed in a V shape; the other end of the first diagonal draw bar and the other end of the second diagonal draw bar are both provided with fixing positions for fixing with a frame.
It should be noted that in this document, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The foregoing is merely a specific embodiment of the application to enable one skilled in the art to understand or practice the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. An electric vehicle axle, comprising: an axle main body, a brake, a motor, a hub and a wide base single tire rim, wherein,
the axle main body is of a plate type structure, upright posts are arranged at two ends of the axle main body, and motor mounting positions are arranged on the outer side of each upright post;
the motor comprises a shell, a stator coil, a rotor coil and a motor rotating shaft, wherein the shell is arranged on a motor installation position at any end of the axle main body, the stator coil is fixed on the inner wall of the shell, the motor rotating shaft is rotatably fixed on the shell, the rotor coil is fixed with the motor rotating shaft, and the stator coil surrounds the rotor coil;
the inner circular surface of the hub is connected with the outer side end of the motor rotating shaft through a spline, the outer circular surface is supported on the inner edge of the shell through two tapered roller bearings, one end, close to the upright post, of the motor rotating shaft is an inner side end, and one end, far away from the upright post, is an outer side end;
the wide base single tire rim is fixed with the hub;
the axes of the motor rotating shaft, the hub and the wide base single tire rim are overlapped, and the axis of the motor rotating shaft is parallel to the plane of the plate type structure of the axle main body;
the motor installation positions are a plurality of threaded holes arranged on the upright post, and the threaded holes are distributed in an annular arrangement;
the shell is provided with a plurality of threaded holes which are in one-to-one correspondence with the threaded holes on the upright post;
the shell is fixed on the motor installation position through bolts and threaded holes;
a cavity is formed in the wide base single tire rim;
the hub is arranged on one end face of the cavity, and the wide base Shan Tai rim and the hub are matched to form a concave installation space;
the motor rotating shaft penetrates through the installation space and is fixed with the hub;
the shell of the motor is positioned in the installation space, and a gap is reserved between the outer wall of the shell and the inner wall of the installation space;
be provided with first mounting hole and second mounting hole on the shell, first mounting hole is close to the axle, the second mounting hole is close to wheel hub, the motor pivot with be connected through single-row ball bearing rotation between the first mounting hole, single-row ball bearing is used for supporting rotor and rotation thereof, wheel hub with be connected through two tapered roller bearing rotation between the second mounting hole, will produce moment effect when vertical load on the wheel is transmitted to the rim, the moment effect is in on the wheel hub to transmit force and moment to the shell through two tapered roller bearings in the outside, be equipped with a single-row ball bearing between the inboard of second mounting hole and the rotor yoke, a single-row ball bearing and two tapered roller bearings still are used for guaranteeing the accurate rotation of motor pivot.
2. The electric vehicle axle of claim 1, further comprising a brake air chamber, a pneumatic actuator, a brake caliper, and a brake disc, wherein,
the brake air chamber stores high-pressure air;
the brake disc is fixed with the inner side end of the motor rotating shaft;
the brake calipers are movably arranged on the upright posts, the positions of the brake calipers correspond to those of the brake discs, and the brake calipers are separated from the brake discs;
the pneumatic actuating mechanism is connected with the brake calipers, the brake air chamber is communicated with the pneumatic actuating mechanism through an air passage pipeline, high-pressure air in the brake air chamber drives the pneumatic actuating mechanism, the pneumatic actuating mechanism pushes the brake calipers to extrude the brake disc, and friction force between the brake disc and the brake calipers decelerates a motor rotating shaft connected with the brake disc.
3. The electric vehicle axle of claim 1, characterized in that the motor shaft is fixed to the hub by a first spline;
two ends of the middle section of the motor rotating shaft, which is positioned in the shell, are respectively provided with a narrower second spline;
the motor rotating shaft is connected with the rotor coil through two second splines, and a gap is reserved between the rotor coil and a part between the two second splines of the motor rotating shaft.
4. The electric vehicle axle of claim 1, wherein either end of the axle body further comprises two shock absorber brackets, wherein,
one end of the shock absorber support is fixed on the side face of the upright post, and a shock absorber support is arranged on the end part of the other end of the shock absorber support;
the shock absorber support is provided with a shock absorber installation position for installing a shock absorber;
an air spring support is arranged on the connecting arm of the shock absorber bracket;
an air spring mounting position is arranged on the air spring support;
the two shock absorber brackets are fixed on the upright post, and the two shock absorber brackets are respectively positioned at two sides of the axis of the motor rotating shaft.
5. The electric vehicle axle of claim 1, characterized in that hollowed holes are provided in the plate-type structure of the axle body;
the hollow holes in the axle main body are symmetrically distributed.
6. The electric vehicle axle of claim 5, wherein the axle body further includes a longitudinal tie at each end thereof, wherein,
the two longitudinal pull rods are symmetrically distributed on the upright post;
the first end of the longitudinal pull rod is arranged on the side surface of the upright post, and the position of the first end of the longitudinal pull rod is close to the position of the motor;
the longitudinal pull rod is perpendicular to the side face of the upright post;
the second end of the longitudinal pull rod is provided with a fixing position for being fixed with the frame.
7. The electric vehicle axle of claim 5, further comprising a first diagonal draw bar and a second diagonal draw bar, wherein,
one end of the first diagonal draw bar and one end of the second diagonal draw bar are both arranged at the center of the side face of the axle main body;
the first diagonal draw bar and the second diagonal draw bar are distributed in a V shape;
the other end of the first diagonal draw bar and the other end of the second diagonal draw bar are both provided with fixing positions for fixing with a frame.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710853682.4A CN108016288B (en) | 2017-09-20 | 2017-09-20 | Electric vehicle axle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710853682.4A CN108016288B (en) | 2017-09-20 | 2017-09-20 | Electric vehicle axle |
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| Publication Number | Publication Date |
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| CN108016288A CN108016288A (en) | 2018-05-11 |
| CN108016288B true CN108016288B (en) | 2024-03-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710853682.4A Active CN108016288B (en) | 2017-09-20 | 2017-09-20 | Electric vehicle axle |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108638839B (en) * | 2018-05-14 | 2019-09-27 | 清华大学 | A kind of electronic axle assembly of low-floor |
| NL2026841B1 (en) * | 2020-11-06 | 2022-06-27 | E Traction Europe Bv | Frame with a brake assembly for an electric vehicle |
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| CN108016288A (en) | 2018-05-11 |
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