CN109501565B - Suspension device for driving motor and electric vehicle comprising same - Google Patents
Suspension device for driving motor and electric vehicle comprising same Download PDFInfo
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- CN109501565B CN109501565B CN201811426788.7A CN201811426788A CN109501565B CN 109501565 B CN109501565 B CN 109501565B CN 201811426788 A CN201811426788 A CN 201811426788A CN 109501565 B CN109501565 B CN 109501565B
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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
- B60K1/00—Arrangement or mounting of electrical propulsion units
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Abstract
The invention discloses a suspension device for a driving motor and an electric vehicle comprising the same, comprising: the suspension body comprises a first end and a second end which are oppositely arranged, the first end is provided with a plurality of through holes at intervals along the width direction, vibration isolation rubber bushings are arranged in the through holes, and first bolts penetrate through the vibration isolation rubber bushings and fix the first end on the motor shell; the second end is provided with limit support seat and screw, be provided with vibration isolation rubber bush subassembly in the limit support seat, the second bolt runs through in proper order vibration isolation rubber bush subassembly with the screw, and will the second end is fixed on sub vehicle frame. The invention provides a suspension device for a driving motor and an electric vehicle comprising the same.
Description
Technical Field
The present invention relates to an automotive powertrain suspension system, and more particularly, to a suspension device for a driving motor and an electric vehicle including the same.
Background
Compared with the traditional internal combustion engine automobile, the new energy electric vehicle has the advantages that the power source is changed from the internal combustion engine into the motor, the requirement on the suspension system is changed due to the change of the driving system, for example, the driving motor of the electric vehicle is lighter in weight, smaller in excitation amplitude of vibration during working and free of idle speed jitter compared with the traditional fuel engine.
In designing a suspension system for an electric machine, the following aspects need to be considered: firstly, according to the output characteristics of the motor, the starting torque of the motor is large, high torque output can be generated at low rotating speed, and the impact problem of the vehicle can be caused by severe torque change when the electric vehicle is started; secondly, the rotating speed range of the driving motor of the electric vehicle is wide, and the vibration noise generated by the driving motor has wide frequency band and shows obvious order characteristics along with the rotating frequency; finally, the electric vehicle drive motor system is more compact in arrangement, and the arrangement space reserved for the suspension system is limited. In order to balance the requirements of rigidity, damping and durability, the suspension system of the traditional internal combustion engine automobile is often low in damping, so that the vibration absorption capacity is limited; the suspension system of the traditional internal combustion engine automobile belongs to a single-degree-of-freedom vibration system in a single vibration transmission direction, the vibration isolation frequency band is narrow, and the dynamic hardening problem of the suspension system causes the suspension system to have weaker control capability on medium-high frequency vibration noise. In addition, from the viewpoint of improving NVH (noise, vibration, and harshness) performance, the lower the suspension stiffness, the better the NVH performance, while the method of reducing the stiffness by reducing the material stiffness with the same dimensions impairs the durability.
Therefore, there is a need for a suspension for a driving motor and an electric vehicle including the same to solve the above-mentioned problems.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a suspension device for a driving motor and an electric vehicle including the same, which can increase the degree of freedom, expand the vibration isolation frequency band, improve the vibration absorption capability, improve the durability without increasing the profile size, and satisfy the NVH stiffness adjustment.
The present invention provides a suspension device for a driving motor, including:
the suspension body comprises a first end and a second end which are oppositely arranged, the first end is provided with a plurality of through holes at intervals along the width direction, vibration isolation rubber bushings are arranged in the through holes, and first bolts penetrate through the vibration isolation rubber bushings and fix the first end on the motor shell; the second end is provided with limit support seat and screw, be provided with vibration isolation rubber bush subassembly in the limit support seat, the second bolt runs through in proper order vibration isolation rubber bush subassembly with the screw, and will the second end is fixed on sub vehicle frame.
Preferably, the vibration isolation rubber bushing comprises a first inner core and an elastic rubber layer at least partially wrapping the outer surface of the first inner core, the vibration isolation rubber bushing is sleeved on the first bolt through the first inner core, and the vibration isolation rubber bushing is in interference fit with the through hole through the elastic rubber layer.
Preferably, the elastic rubber layer is vulcanized and connected to the outer surface of the first inner core, and opposite ends of the first inner core extend to the outside of the elastic rubber layer and are respectively abutted against the motor housing and the flange end face of the first bolt.
Preferably, the limiting support seat comprises a base and mounting walls extending from two opposite sides of the base respectively, the base is provided with mounting holes opposite to the screw holes, and the vibration isolation rubber bushing component is in interference fit with the mounting holes.
Preferably, the vibration isolation rubber bushing assembly sequentially comprises an outer pipe sleeve, a middle pipe sleeve and a second inner core from outside to inside, a first circumferential gap is arranged between the outer pipe sleeve and the middle pipe sleeve, and a plurality of first rubber main springs are distributed at intervals along the circumferential direction of the first circumferential gap; a second annular gap is formed between the middle pipe sleeve and the second inner core, and a plurality of second rubber main springs are distributed at intervals along the circumferential direction of the second annular gap; the vibration isolation rubber bushing assembly is sleeved on the second bolt through the second inner core, and is in interference fit with the mounting hole through the outer sleeve.
Preferably, both opposite ends of the second inner core extend to the outside of the middle pipe sleeve and are respectively abutted with two opposite extending brackets extending from the auxiliary frame.
Preferably, the first rubber main spring comprises a rubber arc plate, the inner wall surface and the outer wall surface of the rubber arc plate are respectively attached to the outer wall surface of the middle pipe sleeve and the inner wall surface of the outer pipe sleeve, a groove is formed in the thickness direction of the rubber arc plate, and the groove extends along the circumferential direction of the rubber arc plate.
Preferably, second rubber main spring includes outer wall, splice bar and inner wall from outside to inside in proper order, the outer wall with well pipe box laminating is connected, the second inner core with the inner wall laminating is connected, the outer wall with be provided with the hoop clearance between the inner wall, it is a plurality of the splice bar along the circumference interval distribution in hoop clearance.
In addition, preferably, the first rubber main spring and the second rubber main spring are respectively made of a first rubber material and a second rubber material, the first rubber material has a rigidity higher than that of the second rubber material, and the first rubber material has a damping coefficient lower than that of the second rubber material.
The invention also provides an electric vehicle which comprises the suspension device for the driving motor.
As can be seen from the above description, the suspension device for driving a motor and the electric vehicle including the same provided by the present invention have the following advantages compared with the prior art: the vibration isolation system that the suspension body is optimized to two degrees of freedom from single degree of freedom, the suspension body carries out the secondary attenuation through vibration isolation rubber bushing and vibration isolation rubber bushing subassembly to the vibration, and then enlarge the scope of vibration isolation frequency band, can cushion the impact that violent change of torque arouses when the electric motor car starts, design parameter is abundant relatively, the debugging space is bigger, make the suspension body possess better vibration isolation and inhale the ability of shaking through structural optimization, control the vibration transmission between motor and the sub vehicle frame effectively, improve the durability when not increasing the overall dimension, obtain better NVH performance. Moreover, the suspension body is of an integrated structure, additional support frame structures and the like are not needed, the mounting is convenient, the size is small, the weight is light, the occupied space is limited, and the space requirement in the electric vehicle is met.
Drawings
The above features and technical advantages of the present invention will become more apparent and readily appreciated from the following description of the embodiments thereof taken in conjunction with the accompanying drawings.
Fig. 1 is a schematic view of a suspension for a drive motor employed in an embodiment of the present invention.
Fig. 2 is an exploded view of the suspension for a driving motor shown in fig. 1.
Fig. 3 is a schematic view illustrating a use state of the suspension for a driving motor shown in fig. 1 connected to the driving motor.
Fig. 4 is an exploded view of the vibration isolating rubber bushing of the suspension for a driving motor shown in fig. 1.
Fig. 5 is an exploded view of the vibration isolating rubber bushing assembly of the suspension for a driving motor shown in fig. 1.
Wherein the reference numbers:
1: a suspension body; 2: a vibration isolating rubber bushing; 21: an elastic rubber layer; 22: a first inner core;
3: a through hole; 4: a limiting support seat; 5: a vibration isolating rubber bushing assembly; 51: an outer pipe sleeve;
52: a first rubber main spring; 53: a middle pipe sleeve; 54: a second rubber main spring;
55: a second inner core; 6: a motor housing; 7: an extension bracket; 8: an auxiliary frame cross beam;
9: a first bolt; 10: and a second bolt.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to specific embodiments and the accompanying drawings. In which like parts are designated by like reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the drawings. The terms "inner" and "outer" are used to refer to directions toward and away from, respectively, the geometric center of a particular component.
Fig. 1 is a schematic view of a suspension for a drive motor employed in an embodiment of the present invention. Fig. 2 is an exploded view of the suspension for a driving motor shown in fig. 1. Fig. 3 is a schematic view illustrating a use state of the suspension for a driving motor shown in fig. 1 connected to the driving motor. As shown in fig. 1 to 3, a suspension device for a driving motor includes: the body 1 is suspended.
The suspension body 1 comprises a first end and a second end which are oppositely arranged, the first end is provided with a plurality of through holes 3 at intervals along the width direction, vibration isolation rubber bushings 2 are arranged in the through holes, and first bolts 9 penetrate through the vibration isolation rubber bushings 2 and fix the first end on the motor shell 6; the second end is provided with limit support seat 4 and screw (not sign), is provided with vibration isolation rubber bush subassembly 5 in the limit support seat 4, and second bolt 10 runs through vibration isolation rubber bush subassembly 5 and screw in proper order to hold the second end to fix on sub vehicle frame.
A vibration isolation rubber bushing 2 is arranged in the through hole 3 at the first end, and a first bolt 9 penetrates through the vibration isolation rubber bushing 2 and fixes the first end on the motor shell 6; and a limit support seat 4 at the second end is provided with a vibration isolation rubber bushing component 5, and a second bolt 10 sequentially penetrates through the vibration isolation rubber bushing component 5 and the screw hole and fixes the second end on the auxiliary frame. Suspension body 1 is optimized from single degree of freedom to the vibration isolation system of two degrees of freedom, suspension body 1 carries out the secondary attenuation through vibration isolation rubber bushing 2 and vibration isolation rubber bushing subassembly 5 to the vibration, and then enlarge the scope of vibration isolation frequency band, can cushion the impact that violent change of torque arouses when the electric motor car starts, design parameter is abundant relatively, the debugging space is bigger, make suspension body 1 possess better vibration isolation and the ability of absorbing vibration through structural optimization, control the vibration transmission between motor and the sub vehicle frame effectively, improve the durability when not increasing the overall dimension, obtain better NVH performance. Moreover, the suspension body 1 is of an integrated structure, does not need additional support frames and other structures, is convenient to install, small in size, light in weight and limited in occupied space, and meets the space requirement in the electric vehicle.
In the embodiment, the plurality of through holes 3 are distributed at the protruding part of the first end at unequal intervals, the number of the vibration isolation rubber bushings 2 is the same as that of the bolts at the connecting position, generally, the first end is provided with three through holes, and the three vibration isolation rubber bushings 2 are respectively installed in the three through holes; the motor shell 6 is provided with three threaded holes with consistent through hole distribution, and the three vibration isolation rubber bushings 2 can all adopt the same structure. The second end is provided with an arc-shaped end surface, the number of the vibration isolation rubber bushing assemblies 5 and the number of the limit supporting seats 4 are the same as the number of the bolts at the connecting position, and generally, the second end is provided with a screw hole and is arranged at the center of the second end; the central lines of the through holes and the screw holes are all parallel.
In this embodiment, the first end of the suspension body 1 is non-rigidly connected to the motor housing 6, the second end of the suspension body 1 is non-rigidly connected to the subframe, the axes of the vibration isolation rubber bushings 2 and the axis of the vibration isolation rubber bushing assembly 5 are parallel to each other, the suspension body 1 can displace in a small amplitude along the vibration transmission direction, and the vibration energy of the specific frequency of the motor and the subframe is transferred to the suspension body 1 by optimizing the design parameters, so as to control the vibration of the specific frequency.
Fig. 4 is an exploded view of the vibration isolating rubber bushing of the suspension for a driving motor shown in fig. 1. As shown in fig. 4, the vibration isolating rubber bushing 2 includes a first inner core 22 and an elastic rubber layer 21.
Preferably, the vibration isolation rubber bushing 2 comprises a first inner core 22 and an elastic rubber layer 21 at least partially wrapping the outer surface of the first inner core 22, the vibration isolation rubber bushing 2 is sleeved on the first bolt 9 through the first inner core 22, and the vibration isolation rubber bushing 2 is in interference fit with the through hole 3 through the elastic rubber layer 21. The elastic rubber layer 21 is directly wrapped on the first inner core 22 and is in interference fit with the through hole 3, and the thickness of the elastic rubber layer is further increased on the basis that the volume of the vibration isolation rubber bushing 2 is not increased, so that the vibration isolation performance is improved. The vibration isolation rubber bushing is simple in structure and convenient to install.
In this embodiment, the first inner core 22 is a hollow cylinder, and the bolt can penetrate through the first inner core 22; the first elastic rubber layer 21 is a hollow cylinder, the inner wall surface of the first elastic rubber layer 21 is attached to the outer wall surface of the first inner core 22, and the outer wall surface of the first elastic rubber layer 21 is in interference fit with the through hole 3.
Preferably, the elastic rubber layer 21 is vulcanized and connected to the outer surface of the first inner core 22, and opposite ends of the first inner core 22 extend to the outside of the elastic rubber layer 21 and abut against the flange end faces of the motor housing 6 and the first bolt 9, respectively. The elastic rubber layer 21 improves sufficient elastic performance for the first inner core 22; after first bolt 9 is connected and is accomplished, vibration isolation rubber bushing 2 through the relative both ends of first inner core 22 respectively with motor casing 6 and the flange terminal surface butt of first bolt 9, avoids suspension body 1 direct contact motor casing 6 and the flange terminal surface of first bolt 9 to realize damping performance.
In the present embodiment, the first core 22 is made of a metal material, such as an aluminum material; when the vibration insulating rubber bushing 2 is installed in the through hole 3, opposite side end surfaces of the first inner core 22 extend to the outside of the suspension body 1.
Preferably, the limit supporting seat 4 comprises a base and mounting walls extending from two opposite sides of the base respectively, the base is provided with a mounting hole opposite to the screw hole, and the vibration isolation rubber bushing assembly 5 is in interference fit with the mounting hole. The bottom surfaces of the base and the mounting walls are both connected to the surface of the suspension body 1, and the two mounting walls respectively extend along two sides of the suspension body 1 so as to increase the connection stability; the mounting hole overlaps with the screw hole of the second end, and when the vibration isolating rubber bushing assembly 5 is assembled with the mounting hole in an interference fit manner, the second bolt 10 may penetrate through the vibration isolating rubber bushing assembly 5 and the screw hole so as to connect the second end to the subframe. The vibration isolation rubber bushing assembly 5 is connected to the suspension body 1 through the limiting support seat 4, and quick assembly can be achieved.
Spacing supporting seat 4 and suspension body 1 structure as an organic whole, or spacing supporting seat 4 is connected on suspension body 1, in this embodiment, the outside parcel at the contact surface of spacing supporting seat 4 and suspension body 1 has the strengthening rib, and the strengthening rib extends to another side installation wall from a side installation wall to increase spacing supporting seat 4 and suspension body 1 joint strength between them.
Fig. 5 is an exploded view of the vibration isolating rubber bushing assembly of the suspension for a driving motor shown in fig. 1. As shown in fig. 5, the vibration isolating rubber bushing assembly 5 includes an outer jacket 51, a first rubber main spring 52, a middle jacket 53, a second rubber main spring 54, and a second inner core 55.
Preferably, the vibration isolation rubber bushing assembly 5 comprises an outer sleeve 51, a middle sleeve 53 and a second inner core 55 in sequence from outside to inside, a first annular gap is arranged between the outer sleeve 51 and the middle sleeve 53, and the plurality of first rubber main springs 52 are distributed at intervals along the circumferential direction of the first annular gap; a second annular gap is formed between the middle pipe sleeve 53 and the second inner core 55, and a plurality of second main rubber springs 54 are distributed at intervals along the circumferential direction of the second annular gap; the vibration isolation rubber bushing assembly 5 is sleeved on the second bolt 10 through the second inner core 55, and the vibration isolation rubber bushing assembly 5 is in interference fit with the mounting hole through the outer sleeve 51. Outer pipe sleeve 51 wraps up on well pipe box 53 through first rubber main spring 52, and well pipe box 53 wraps up on second inner core 55 through second rubber main spring 54, and first rubber main spring 52 provides the primary attenuation for the vibration, and second rubber main spring 54 provides the secondary attenuation for the vibration to improve the vibration isolation performance.
In this embodiment, the second inner core 55 is a strip-shaped structure, a circular hole penetrating along the length direction is formed in the strip-shaped structure, square grooves are formed in the side walls of two opposite sides of the circular hole, the second bolt is installed in the circular hole, and the square grooves are used for positioning in the part manufacturing process.
Preferably, the opposite ends of the second inner core 55 extend to the outside of the middle tube 53 and are respectively abutted against two opposite extension brackets 7 extending from the subframe. The vibration isolation rubber bushing assembly 5 is respectively abutted on the extension brackets 7 on both sides through the opposite ends of the second inner core 55, so that the suspension body 1 is prevented from directly contacting the extension brackets 7, and the vibration damping performance is realized.
In this embodiment, the subframe includes a subframe cross beam 8 and two opposite extension brackets 7 extending from the subframe cross beam 8, the extension brackets 7 are welded to the subframe cross beam 8, the suspension body 1 is disposed between the two extension brackets 7 and abuts against the subframe cross beam 8, the vibration isolation rubber bushing assembly 5 abuts against the extension brackets 7 on both sides through the opposite ends of the second inner core 55, and the second bolt 10 penetrates through the vibration isolation rubber bushing assembly 5, the screw hole and the screw holes in the extension brackets 7 on both sides, and is fixed.
Preferably, the first rubber main spring 52 comprises a rubber arc plate, the inner wall surface and the outer wall surface of the rubber arc plate are respectively attached to the outer wall surface of the middle pipe sleeve 53 and the inner wall surface of the outer pipe sleeve 51, a groove is arranged in the thickness direction of the rubber arc plate, and the groove extends along the circumferential direction of the rubber arc plate. The first rubber main spring 52 adopts a rubber arc plate as a first layer of vibration reduction structure, is arranged between the outer pipe sleeve 51 and the middle pipe sleeve 53, and can perform primary vibration reduction; and the groove structure may provide a deformation space to absorb more vibration.
In this embodiment, the number of the rubber arc plates is two, and the rubber arc plates are symmetrically and discontinuously distributed in the first annular gap; the length of the rubber arc plate is larger than the gap between the two rubber arc plates; the thickness of the rubber arc plate is not less than the gap between the outer pipe sleeve 51 and the middle pipe sleeve 53, and the rubber arc plate is arranged in the gap in an interference fit mode. The grooves are distributed continuously along the circumferential direction of the rubber arc plate.
Preferably, the second rubber main spring 54 sequentially comprises an outer wall, a connecting rib and an inner wall from outside to inside, the outer wall is connected with the middle pipe sleeve 53 in a fitting manner, the second inner core 55 is connected with the inner wall in a fitting manner, a circumferential gap is formed between the outer wall and the inner wall, and the connecting ribs are distributed along the circumferential interval of the circumferential gap. The second rubber main spring 54 is arranged between the middle pipe sleeve 53 and the second inner core 55, and an annular gap exists between the inner wall and the outer wall, so that sufficient space is provided for deformation to absorb vibration, and the connecting ribs can effectively transmit vibration. The second rubber main spring 54 secondarily attenuates the vibration by adopting the above structure, so as to achieve a higher vibration isolation effect.
In the present embodiment, the first rubber main spring 52 and the second rubber main spring 54 are separated by the middle sleeve 53, and the connection form is a series structure; second rubber main spring 54 is central symmetry structure, and the surface of outer wall and well pipe box 53's internal face laminating are connected, and the outer wall encloses to close and forms hollow tubular structure, and the surface of second inner core 55 is connected with the internal surface laminating of inner wall, and the inner wall encloses to close and forms hollow stripe structure, and a plurality of splice bars are equidistant discontinuous distribution in the circumferential clearance, and the width of splice bar is from the outer wall to the inner wall and reduces earlier the back and increase.
In addition, the first rubber main spring 52 and the second rubber main spring 54 are preferably made of a first rubber material and a second rubber material, respectively, the first rubber material has a rigidity higher than that of the second rubber material, and the damping coefficient of the first rubber material is smaller than that of the second rubber material. The first rubber main spring 52 and the second rubber main spring 54 are made of different rubber materials so as to meet the requirements of durability and vibration absorption performance at the same time.
In the present embodiment, the outer jacket 51, the middle jacket 53 and the second inner core 44 are made of a metal material, such as aluminum. The first rubber main spring 52 is arranged between the outer sleeve 51 and the middle sleeve 53, and the rigidity of the first rubber material is relatively higher, so that the first rubber main spring 52 has better structural stability; the first rubber material is selected as the rigidity adjusting layer, the vibration isolation rubber bushing component 5 is enabled to have a proper rigidity debugging range by changing the formula of the first rubber material so as to meet the NVH debugging requirement in the suspension development and design stage, the rigidity of the first rubber material is changed by adjusting the hardness of the first rubber material, the structure of the first rubber main spring 52 is enabled to be more robust and more stable, and the required durability can be kept even if the hardness is reduced. The second rubber main spring 54 is arranged between the middle pipe sleeve 53 and the second inner core 33, and the second rubber material has better damping performance, such as SBR (styrene butadiene rubber), and has certain vibration absorption capacity, so that vibration is further attenuated, and the first rubber main spring 52 has better vibration reduction performance.
The use of the suspension for the drive motor is described further below.
The three vibration isolation rubber bushings 2 are sequentially pressed into a through hole at the first end of the suspension body 1 in an interference fit mode, and the two opposite ends of the first inner core 22 extend to the outside of the suspension body 1; the vibration isolation rubber bushing assembly 5 is pressed into the limit support seat 4 at the second end of the suspension body 1 in an interference fit manner, and the two opposite ends of the second inner core 55 respectively extend to the outside of the suspension body 1. The first rubber main spring 52 and the second rubber main spring 54 are made of different rubber materials, so as to meet the requirements of durability and vibration absorption performance.
The second end of the suspension body 1 is placed between the two extension brackets 7 and abutted against the subframe cross beam 8, the two opposite ends of the second inner core 55 are abutted against the extension brackets 7 on the two sides respectively, and the second bolt 10 penetrates through the second inner core 55 and the screw hole of the vibration isolation rubber bushing assembly 5 and the screw holes in the extension brackets 7 on the two sides and is fixed. Three first bolts 9 are installed in proper order, and first bolt inserts first inner core 22, and the relative both ends of first inner core 22 respectively with motor casing 6 and the flange terminal surface butt of first bolt 9, first bolt 9 runs through the screw hole on first inner core 22, the through-hole of vibration isolation rubber bush 2 and the motor casing 6 to the realization is fixed.
After the vibration isolation device is installed, the vibration transmission path is motor shell 6-vibration isolation rubber bushing 2-suspension body 1-vibration isolation rubber bushing component 5-auxiliary frame extension support 7-auxiliary frame-vehicle body, and vibration is secondarily attenuated by the suspension body 1 through the vibration isolation rubber bushing 2 and the vibration isolation rubber bushing component 5, so that a better vibration isolation effect is realized. And the axes of the vibration isolation rubber bushings 2 and the axes of the vibration isolation rubber bushing assemblies 5 are parallel to each other, so that the suspension body 1 has the capability of moving relative to the motor shell 6 and the auxiliary frame, and the vibration energy of specific frequencies of the motor and the auxiliary frame is transferred to the suspension body 1 through optimized design parameters, thereby achieving the purpose of controlling the vibration of the specific frequencies.
The invention also provides an electric vehicle which comprises the suspension device for the driving motor. The electric motor car adopts above-mentioned suspension body to optimize the vibration isolation system for two degrees of freedom from single degree of freedom, the suspension body carries out the secondary attenuation through vibration isolation rubber bushing and vibration isolation rubber bushing subassembly to the vibration, and then enlarge the scope of vibration isolation frequency band, can cushion the impact that violent change of torque arouses when the electric motor car starts, design parameter is abundant relatively, the debugging space is bigger, make the suspension body possess better vibration isolation and inhale the ability of shaking through structural optimization, control the vibration transmission between motor and the sub vehicle frame effectively, improve the durability when not increasing the overall dimension, obtain better NVH performance. Moreover, the suspension body is of an integrated structure, additional support frame structures and the like are not needed, the mounting is convenient, the size is small, the weight is light, the occupied space is limited, and the space requirement in the electric vehicle is met.
As can be seen from the above description and practices, the suspension for driving a motor and the electric vehicle including the same provided by the present invention have the following advantages compared with the prior art: the vibration isolation system that the suspension body is optimized to two degrees of freedom from single degree of freedom, the suspension body carries out the secondary attenuation through vibration isolation rubber bushing and vibration isolation rubber bushing subassembly to the vibration, and then enlarge the scope of vibration isolation frequency band, can cushion the impact that violent change of torque arouses when the electric motor car starts, design parameter is abundant relatively, the debugging space is bigger, make the suspension body possess better vibration isolation and inhale the ability of shaking through structural optimization, control the vibration transmission between motor and the sub vehicle frame effectively, improve the durability when not increasing the overall dimension, obtain better NVH performance. Moreover, the suspension body is of an integrated structure, additional support frame structures and the like are not needed, the mounting is convenient, the size is small, the weight is light, the occupied space is limited, and the space requirement in the electric vehicle is met.
Those of ordinary skill in the art will understand that: the above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents, improvements and the like made within the spirit of the present invention should be included in the scope of the present invention.
Claims (5)
1. A suspension for a drive motor, comprising:
the suspension body comprises a first end and a second end which are oppositely arranged, the first end is provided with a plurality of through holes at intervals along the width direction, vibration isolation rubber bushings are arranged in the through holes, and first bolts penetrate through the vibration isolation rubber bushings and fix the first end on the motor shell; the second end is provided with a limiting support seat and a screw hole, a vibration isolation rubber bushing assembly is arranged in the limiting support seat, and a second bolt sequentially penetrates through the vibration isolation rubber bushing assembly and the screw hole and fixes the second end on the auxiliary frame;
the vibration isolation rubber bushing comprises a first inner core and an elastic rubber layer at least partially wrapping the outer surface of the first inner core, the vibration isolation rubber bushing is sleeved on the first bolt through the first inner core, and the vibration isolation rubber bushing is in interference fit with the through hole through the elastic rubber layer;
the limiting support seat comprises a base and mounting walls extending from two opposite sides of the base respectively, a mounting hole opposite to the screw hole is formed in the base, and the vibration isolation rubber bushing component is in interference fit with the mounting hole;
the vibration isolation rubber bushing assembly sequentially comprises an outer pipe sleeve, a middle pipe sleeve and a second inner core from outside to inside, a first annular gap is formed between the outer pipe sleeve and the middle pipe sleeve, and a plurality of first rubber main springs are distributed at intervals along the circumferential direction of the first annular gap; a second annular gap is formed between the middle pipe sleeve and the second inner core, and a plurality of second rubber main springs are distributed at intervals along the circumferential direction of the second annular gap; the vibration isolation rubber bushing assembly is sleeved on the second bolt through the second inner core and is in interference fit with the mounting hole through the outer sleeve;
the first rubber main spring comprises a rubber arc plate, the inner wall surface and the outer wall surface of the rubber arc plate are respectively attached and connected with the outer wall surface of the middle pipe sleeve and the inner wall surface of the outer pipe sleeve, a groove is arranged in the thickness direction of the rubber arc plate, and the groove extends along the circumferential direction of the rubber arc plate;
the second rubber main spring comprises an outer wall, a connecting rib and an inner wall from outside to inside in sequence, the outer wall is connected with the middle pipe sleeve in a laminating mode, the second inner core is connected with the inner wall in a laminating mode, a circumferential gap is formed between the outer wall and the inner wall, and the connecting rib is arranged along the circumferential interval distribution of the circumferential gap.
2. The suspension for a drive motor of claim 1,
the elastic rubber layer is connected to the outer surface of the first inner core in a vulcanization mode, and the two opposite ends of the first inner core extend to the outside of the elastic rubber layer and are respectively abutted to the motor shell and the flange end face of the first bolt.
3. The suspension for a drive motor of claim 1,
the two opposite ends of the second inner core extend to the outer part of the middle pipe sleeve and are respectively abutted to two opposite extending supports extending from the auxiliary frame.
4. The suspension for a drive motor of claim 1,
the first rubber main spring and the second rubber main spring are respectively made of a first rubber material and a second rubber material, the rigidity of the first rubber material is larger than that of the second rubber material, and the damping coefficient of the first rubber material is smaller than that of the second rubber material.
5. An electric vehicle characterized in that it comprises a suspension device for a drive motor according to any one of claims 1 to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811426788.7A CN109501565B (en) | 2018-11-27 | 2018-11-27 | Suspension device for driving motor and electric vehicle comprising same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811426788.7A CN109501565B (en) | 2018-11-27 | 2018-11-27 | Suspension device for driving motor and electric vehicle comprising same |
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| CN109501565A CN109501565A (en) | 2019-03-22 |
| CN109501565B true CN109501565B (en) | 2021-11-26 |
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|---|---|---|---|---|
| CN111284314B (en) * | 2018-12-07 | 2021-11-16 | 上汽通用汽车有限公司 | Suspension bushing for vehicle and vehicle |
| CN110774879B (en) * | 2019-08-27 | 2021-04-20 | 浙江零跑科技有限公司 | Multistage vibration isolation structure of electricity drive assembly suspension |
| DE102019124348A1 (en) * | 2019-09-11 | 2021-03-11 | Bayerische Motoren Werke Aktiengesellschaft | Storage arrangement of a component on an axle support for a motor vehicle and motor vehicles, in particular passenger vehicles |
| CN110920374A (en) * | 2019-12-25 | 2020-03-27 | 宜宾凯翼汽车有限公司 | Rigidity-adjustable vibration isolation device for vehicle and rigidity adjusting method thereof |
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| CN111734764B (en) * | 2020-07-03 | 2021-01-29 | 博戈橡胶塑料（株洲）有限公司 | Bushing for suspension of electric automobile power assembly and suspension system |
| CN112440712A (en) * | 2020-11-02 | 2021-03-05 | 建新赵氏科技有限公司 | Bush suspension with rubber sheet structure |
| CN113879087A (en) * | 2021-09-28 | 2022-01-04 | 东风汽车集团股份有限公司 | Suspension bush, suspension structure and electric motor car |
| CN114439834B (en) * | 2022-01-17 | 2023-10-03 | 株洲时代瑞唯减振装备有限公司 | Low ovality center pin sleeve capable of realizing bidirectional rigidity changing requirement |
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| CN109501565A (en) | 2019-03-22 |
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