CN218316087U - Electric vehicle drive axle assembly - Google Patents
Electric vehicle drive axle assembly Download PDFInfo
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- CN218316087U CN218316087U CN202223055341.8U CN202223055341U CN218316087U CN 218316087 U CN218316087 U CN 218316087U CN 202223055341 U CN202223055341 U CN 202223055341U CN 218316087 U CN218316087 U CN 218316087U
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Abstract
The utility model relates to an electric vehicle drive axle assembly, which comprises two power assemblies with the same structure, wherein the two power assemblies are symmetrically arranged and are respectively matched with the rear wheels of the electric vehicle at the corresponding side; the output torque of the matched motor is respectively controlled through the double controllers, so that the electronic differential function is realized; the drive axle assembly integrates power and braking functions, ensures the functions, and has compact integral structure and smaller occupied space.
Description
Technical Field
The utility model relates to an electric motor car drive axle assembly relates to the drive axle that realizes the individual drive.
Background
In the field of electric vehicles, particularly in the industry of electric karts, a rear shaft type single motor is generally adopted for driving, and two defects can be caused by the driving mode, wherein the first defect is that the force application is uneven due to the driving of the single motor, the power of the whole kart is weaker, and the second defect is that the single motor drives the rear wheels at two sides simultaneously, so that the differential speed of the rear wheels at two sides can not be realized while the portability and the spatial performance of the kart are met.
Therefore, a new electric vehicle drive axle assembly needs to be designed to solve the above-mentioned drawbacks while ensuring the functions.
SUMMERY OF THE UTILITY MODEL
The utility model provides an electric vehicle drive axle assembly controls the output torque who matches the motor respectively through dual controller to realize the rear wheel differential.
The utility model provides a technical scheme that its technical problem adopted is:
an electric vehicle drive axle assembly comprises two power assemblies with the same structure, wherein the two power assemblies are symmetrically arranged and respectively matched with rear wheels of electric vehicles on corresponding sides;
the power assembly comprises a power assembly base, a half shaft, a large belt wheel, a first belt bearing, a second belt bearing, a first wheel hub and a second wheel hub, wherein a three-dimensional coordinate system is established by taking the center of the half shaft as an origin, taking the axial direction of the half shaft as an X axis, taking the radial direction as a Y axis and taking the direction vertical to the ground as a Z axis;
one end of the half shaft sequentially penetrates through a first wheel hub, a first bearing with a seat, a large belt wheel, a second bearing with a seat and a second wheel hub, the first bearing with the seat and the end part of the power assembly base located in the positive direction of the X axis are fixed, and the second bearing with the seat and the end part of the power assembly base located in the negative direction of the X axis are fixed;
one end face of the large belt wheel is attached to the first belt seat bearing, a space is reserved between one end face side of the large belt wheel and the first wheel hub, a wheel hub key is arranged on a half shaft in the space close to the first wheel hub, and meanwhile, a copper sleeve is sleeved on the half shaft in the space;
a pulley key is arranged on the circumference of the half shaft on the other end face side of the large pulley, a protruding end is arranged on the pulley key, the width of the protruding end on the X axis is matched with the width of the large pulley on the X axis, and the large pulley is limited to play in the axial direction of the half shaft;
the other end of the half shaft, which is close to the second hub, is sleeved with a brake disc, and the disc surface of the brake disc is fixedly connected with the end surface of the second hub;
the side wall of the power assembly base close to the brake disc is bolted with calipers, and when the electric vehicle drive axle assembly is in a braking working condition, the calipers are contacted with the brake disc;
the power assembly base is also provided with a motor, the motor is positioned above the half shaft in the Z-axis direction, a motor belt wheel is sleeved on a rotating shaft of the motor, and the motor belt wheel is connected with the wheel surface of the large belt wheel through a belt;
as a further preference of the present invention, the pulley key is Z-shaped, and in the Y-axis direction, a protruding end is provided on the side surface of the pulley key that matches with the large pulley, and a protruding portion provided on the side surface of the pulley key-embedded half shaft matches with a flat key groove with a model number of 8 × 30;
as a further preference of the utility model, when the electric vehicle drive axle assembly is in the braking condition, the brake fluid pushes the piston of the caliper, the caliper and the brake disc are locked, and the half shaft cannot rotate;
as a further preference of the utility model, each end part of the power assembly base located on one side of the negative direction of the Y axis is provided with two long hole grooves along the Z axis direction;
the power assembly base is positioned on one side of the positive direction of the Y axis, and the end part of the side positioned on the positive direction of the X axis is provided with two long hole grooves along the Z axis direction;
two ends of the motor are respectively provided with a motor bracket, each motor bracket is respectively fixed with two ends of the power assembly base positioned on the X axis, each long hole groove is provided with a bolt to connect the motor bracket with the power assembly base, the bolt moves in the long hole groove along the Z axis direction, and the motor moves in the Z axis direction relative to the power assembly base;
as a further preference of the utility model, each motor bracket is provided with an extension part at the top in the Y-axis negative direction, the extension part is provided with a welding nut, the power assembly base matched with the extension part is provided with an ear piece, the tensioning bolt penetrates through the welding nut and the ear piece along the Z-axis direction, and the position adjustment of the motor relative to the power assembly base is realized by rotating the tensioning bolt;
as a further preference of the present invention, the transmission ratio of the large belt wheel connected through the belt to the motor belt wheel is 46:22;
as the utility model discloses a further preferred, be located the power assembly base side installation controller of Y axle negative direction, controller and motor intercommunication.
Through above technical scheme, for prior art, the utility model discloses following beneficial effect has:
1. the utility model provides an electric vehicle drive axle assembly, which comprises two power assemblies which are symmetrically arranged, and the two power assemblies can respectively and independently drive the rear wheels at the corresponding sides, thereby realizing the electronic differential function;
2. the utility model provides an electric motor car transaxle assembly, integrated power and braking function, the transmission is stable, when guaranteeing the function, overall structure is compact, and occupation space is less.
Drawings
The present invention will be further explained with reference to the drawings and examples.
Fig. 1 is a schematic view of the overall structure of a drive axle assembly provided by the present invention;
FIG. 2 is a perspective view of a single powertrain provided by the present invention;
FIG. 3 is a top view of a single powertrain provided by the present invention;
fig. 4 is a schematic diagram illustrating the disassembly of a single powertrain provided by the present invention;
FIG. 5 is a side view of a single powertrain provided by the present invention;
FIG. 6 is a schematic diagram of a single powertrain axle construction;
fig. 7 is a schematic structural diagram of a single powertrain to which no half shaft is mounted.
In the figure: the device comprises a power assembly 1, a power assembly base 1.1, a large belt wheel 1.2, a belt 1.3, a motor 1.4, a controller 1.5, a tension bolt 1.6, a caliper 1.7, a half shaft 1.8, a brake disc 1.9, a first bearing with a seat 1.10, a copper sleeve 1.11, a first hub 1.12, a belt wheel key 1.13, a hub key 1.14, a second bearing with a seat 1.15, a second hub 1.16 and a motor support 1.17.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. In the description of the present application, it is to be understood that the terms "left side", "right side", "upper part", "lower part", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, "first", "second", etc., do not represent the degree of importance of the component parts, and thus, are not to be construed as limiting the present invention. The specific dimensions used in the present embodiment are only for illustrating the technical solution, and do not limit the protection scope of the present invention.
As explained in the background art, in the driving part of the electric vehicle, especially for the electric kart, the rear wheel differential speed is difficult to realize due to the adoption of the rear shaft type single motor driving, and then the problem of weak power is caused. Based on this, engineers have developed a drive axle assembly through many tests, and it includes two power assemblies 1 that bilateral symmetry set up, and overall structure is as shown in fig. 1, and two power assemblies that the structure is the same match the rear wheel of corresponding side electric motor car respectively.
With reference to fig. 2 to 4, the powertrain includes a powertrain base, a half shaft 1.8, a large pulley 1.2, a first pulley bearing 1.10, a second pulley bearing 1.15, a first hub 1.12 and a second hub 1.16, where for accurately describing the structure of the powertrain, a three-dimensional coordinate system is established with the center of the half shaft as an origin, the axial direction thereof being an X axis, the radial direction thereof being a Y axis, and the direction perpendicular to the ground being a Z axis;
one end of the half shaft penetrates through a first wheel hub, a first belt seat bearing, a large belt wheel, a second belt seat bearing and a second wheel hub in sequence, the first belt seat bearing and the end, located in the positive direction of the X axis, of the power assembly base are fixed through bolts, and the second belt seat bearing and the end, located in the negative direction of the X axis, of the power assembly base are fixed through bolts; the half shaft is installed on the power assembly base through the first bearing with the seat and the second bearing with the seat, and then the first hub and the second hub are fixed respectively in a key connection mode, the first hub is used for being matched with the installation of a rear wheel, and the second hub is used for installing a brake disc 1.9, so that power transmission is achieved.
One end face of the large belt wheel is attached to the first belt seat bearing, a space is reserved between one end face side of the large belt wheel and the first wheel hub, as shown in fig. 6, a wheel hub key 1.14 is arranged on a half shaft in the space close to the first wheel hub, and a copper sleeve 1.11 is sleeved on the half shaft in the space; here, the arrangement of the hub key and the copper bush enables the mounting position of the first hub to be determined to secure the rear wheel track. The pulley key 1.13 is arranged on the circumference of the half shaft on the other end face side of the large pulley, a protruding end is arranged on the pulley key, the width of the protruding end on the X shaft is matched with the width of the large pulley on the X shaft, the pulley key is manufactured by a non-standard manufacturing process and is formed by modifying according to a standard flat key, the enlarged part in the figure 5 is the specific structure of the pulley key, the pulley key is Z-shaped, the protruding end is arranged on the side face, matched with the large pulley, of the pulley key in the Y shaft direction, the protruding part arranged on the side face, embedded into the half shaft, of the pulley key is matched with a flat key groove with the model number of 8X 30, and the arrangement of the pulley key can limit the play of the large pulley in the axial direction of the half shaft so as to ensure the stability of transmission.
The other end of the half shaft, which is close to the second hub, is sleeved with a brake disc, and the disc surface of the brake disc is fixedly connected with the end surface of the second hub; the second hub and the brake disc are bolted and fixed on the half shaft, and the brake disc and the half shaft rotate at the same speed through flat key transmission.
Be close to power assembly base lateral wall of brake disc on the bolt calliper 1.7, through adjusting the position that first wheel hub, second wheel hub kept the brake disc in the position on the semi-axis, what this application adopted is the hydraulic braking mode, the fixed calliper of assembly, the high efficiency and the stability of guarantee braking. When the electric vehicle drive axle assembly is in a braking working condition, the brake disc and the calipers are not contacted, when the electric vehicle drive axle assembly is in a moving working condition, the brake fluid pushes the piston of the calipers, the calipers and the brake disc are locked at the moment, the half shaft does not rotate, and a braking function is realized.
The rotation of semi-axis needs power, still installs motor 1.4 on the power assembly base, and in the Z axle direction, the motor is located the top of semi-axis, and the cover is established the motor band pulley in the axis of rotation of motor, and the motor band pulley passes through belt 1.3 and is connected with the wheel face of big band pulley. The controller 1.5 is installed on the side face, located in the Y-axis negative direction, of the power assembly base, the controller is communicated with the motor, the controller is directly installed on the power assembly base, the length of a wiring harness is reduced, and the power assembly base is convenient to install and detect. In actual operation, the tension of the belt needs to be adjusted, and as the belt is used for connecting the motor belt wheel and the large belt wheel, the tension degree of the belt is realized by the position of the motor relative to the power assembly base. In the application, each end part of the power assembly base, which is positioned on one side of the Y-axis negative direction, is provided with two long hole grooves along the Z-axis direction; the power assembly base is positioned on one side of the positive direction of the Y axis, and the end part of the side positioned on the positive direction of the X axis is provided with two long hole grooves along the Z axis direction; here, the motor is fixed with the power assembly base through the motor support 1.17, as shown in fig. 7, two ends of the motor are respectively provided with a motor support, each motor support is respectively fixed with two ends of the power assembly base located on the X axis, each long hole groove is provided with a bolt to connect the motor support with the power assembly base, the bolt moves in the long hole groove along the Z axis direction, and the motor moves in the Z axis direction relative to the power assembly base.
The position of the motor relative to the power assembly base is adjusted by arranging an extending part at the top of each motor support in the Y-axis negative direction, arranging a welding nut on the extending part, arranging a lug piece on the power assembly base matched with the extending part, penetrating the welding nut and the lug piece along the Z-axis direction by a tensioning bolt 1.6, and rotating the tensioning bolt to realize the position adjustment of the motor relative to the power assembly base and fix a proper tensioning state height.
When the design position of the long hole slot is described above, it can be seen from fig. 2 that the drive axle assembly is not symmetrically arranged on both sides of the power assembly base, because the applicant has pointed out in the background art that the drive axle assembly designed in the present application is mainly used on an electric kart, and then, based on the internal structure of the current electric kart, especially the structure of the driving portion, the objectives of compact overall structure and small occupied space (i.e. portability and spatial property) are satisfied while ensuring the functions. If the operation effect of the electric kart aimed by the application is to be met, the transmission ratio of the large belt wheel and the motor belt wheel connected through the belt is set to be 46:22, under the setting, the transmission efficiency is ensured and the abnormal transmission sound is reduced through the transmission connection of the synchronous belt.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The meaning of "and/or" as used herein is intended to include both the individual components or both.
The term "connected" as used herein may mean either a direct connection between components or an indirect connection between components via other components.
In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (7)
1. The utility model provides an electric motor car transaxle assembly which characterized in that: the electric vehicle comprises two power assemblies with the same structure, wherein the two power assemblies are symmetrically arranged and respectively matched with the rear wheels of the electric vehicle on the corresponding side;
the power assembly comprises a power assembly base, a half shaft, a large belt wheel, a first belt bearing, a second belt bearing, a first wheel hub and a second wheel hub, wherein a three-dimensional coordinate system is established by taking the center of the half shaft as an origin, taking the axial direction of the half shaft as an X axis, taking the radial direction as a Y axis and taking the direction vertical to the ground as a Z axis;
one end of the half shaft penetrates through a first wheel hub, a first belt seat bearing, a large belt wheel, a second belt seat bearing and a second wheel hub in sequence, the first belt seat bearing is fixed with the end part of the power assembly base located in the positive direction of the X axis, and the second belt seat bearing is fixed with the end part of the power assembly base located in the negative direction of the X axis;
one end face of the large belt wheel is attached to the first belt seat bearing, a space is reserved between one end face side of the large belt wheel and the first wheel hub, a wheel hub key is arranged on a half shaft in the space close to the first wheel hub, and meanwhile, a copper sleeve is sleeved on the half shaft in the space;
a pulley key is arranged on the circumference of the half shaft on the other end face side of the large pulley, a protruding end is arranged on the pulley key, the width of the protruding end on the X axis is matched with the width of the large pulley on the X axis, and the large pulley is limited to play in the axial direction of the half shaft;
a brake disc is sleeved at the other end of the half shaft close to the second hub, and the disc surface of the brake disc is tightly connected with the end surface of the second hub;
the side wall of the power assembly base close to the brake disc is bolted with calipers, and when the electric vehicle drive axle assembly is in a braking working condition, the calipers are contacted with the brake disc;
the power assembly base is further provided with a motor, the motor is located above the half shaft in the Z-axis direction, a motor belt wheel is sleeved on a rotating shaft of the motor, and the motor belt wheel is connected with the wheel surface of the large belt wheel through a belt.
2. The electric vehicle transaxle assembly of claim 1 wherein: the belt wheel key is Z-shaped, a protruding end is arranged on the side face, matched with the large belt wheel, of the belt wheel key in the Y-axis direction, and the protruding portion, arranged on the side face, embedded into the half shaft, of the belt wheel key is matched with the flat key groove with the model number of 8-30.
3. The electric vehicle transaxle assembly of claim 2 wherein: when the electric vehicle drive axle assembly is in a braking working condition, the brake fluid pushes the piston of the caliper, the caliper and the brake disc are locked, and the half shaft cannot rotate.
4. The electric vehicle transaxle assembly of claim 3 wherein: each end part of the power assembly base, which is positioned on one side of the Y-axis negative direction, is provided with two long hole grooves along the Z-axis direction;
the power assembly base is positioned on one side of the positive direction of the Y axis, and the end part of the side positioned on the positive direction of the X axis is provided with two long hole grooves along the Z axis direction;
the two ends of the motor are respectively provided with a motor support, each motor support is fixed with the two ends of the power assembly base located on the X shaft, each long hole groove is provided with a bolt to connect the motor support with the power assembly base, the bolt moves in the long hole groove along the Z shaft direction, and the motor moves in the Z shaft direction relative to the power assembly base.
5. The electric vehicle transaxle assembly of claim 4 wherein: the top of each motor support in the Y-axis negative direction is provided with an extending portion, a welding nut is arranged on each extending portion, a lug piece is arranged on a power assembly base matched with each extending portion, a tensioning bolt penetrates through the welding nuts and the lug pieces along the Z-axis direction, and the position of the motor relative to the power assembly base is adjusted by rotating the tensioning bolt.
6. The electric vehicle transaxle assembly of claim 5 wherein: the transmission ratio of the large belt wheel and the motor belt wheel connected through the belt is 46:22.
7. the electric vehicle transaxle assembly of claim 6 wherein: and a controller is arranged on the side surface of the power assembly base positioned in the Y-axis negative direction and is communicated with the motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223055341.8U CN218316087U (en) | 2022-11-17 | 2022-11-17 | Electric vehicle drive axle assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223055341.8U CN218316087U (en) | 2022-11-17 | 2022-11-17 | Electric vehicle drive axle assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218316087U true CN218316087U (en) | 2023-01-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223055341.8U Active CN218316087U (en) | 2022-11-17 | 2022-11-17 | Electric vehicle drive axle assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218316087U (en) |
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2022
- 2022-11-17 CN CN202223055341.8U patent/CN218316087U/en active Active
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