CN212195090U - Swing support of pure electric vehicle - Google Patents
Swing support of pure electric vehicle Download PDFInfo
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- CN212195090U CN212195090U CN202020383460.8U CN202020383460U CN212195090U CN 212195090 U CN212195090 U CN 212195090U CN 202020383460 U CN202020383460 U CN 202020383460U CN 212195090 U CN212195090 U CN 212195090U
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- bushing
- side wall
- shaped fork
- connecting rod
- pure electric
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Abstract
The utility model discloses a pure electric vehicle swing support, which comprises a bushing, a bracket and a connecting rod, wherein the bushing comprises an inner sleeve, a rubber layer and an outer sleeve which are coaxially arranged from inside to outside, and the bracket comprises a cylinder and two side lugs; one end of the connecting rod is provided with a boss through hole which is communicated up and down, and the other end of the connecting rod is inwards provided with a U-shaped fork opening; the middle part of the connecting rod is provided with a positioning pin connecting hole which is communicated up and down; the front side wall and the rear side wall of the U-shaped fork opening are respectively provided with a lining connecting hole which is communicated from front to back; the bracket is arranged in the U-shaped fork opening; the bushing is sleeved in the cylinder of the bracket; the front end and the rear end of the inner sleeve of the bushing are fixed with the bushing connecting holes on the front side wall and the rear side wall of the U-shaped fork opening in a one-to-one correspondence mode through bolts and nuts. The utility model discloses a pure electric vehicles swinging support, satisfying under the assembly requirement, promoted the static state of product and drawn the compression strength and draw the compression strength (the weler intensity) with the developments, satisfied the joint strength requirement of whole car.
Description
Technical Field
The utility model relates to a pure electric vehicles swing support.
Background
Compared with a fuel vehicle, the electric vehicle has the greatest driving feeling that the vehicle runs out when the vehicle starts up and the electric door is lightly touched. The engines of electric vehicles and fuel vehicles output power in a rotating mode, and within the same power level, the torque directly determines the acceleration performance of one vehicle.
For a pure electric vehicle, the torque fluctuation of the motor is much lower than that of the engine, and mainly occurs in the working conditions of creeping, accelerating, decelerating and braking. But the torque of the electric machine is significantly greater than that of the engine. The requirements of the pure electric vehicle on the vibration isolation capability of the supporting system are lower than those of the fuel vehicle, but the requirements on the torsional strength and the limiting capability of the supporting system are far higher than those of the fuel vehicle. Therefore, the support system should have sufficient torque resistance and limiting capability to ensure that the displacement of the powertrain is within a reasonable range under the action of large torque.
The swing support is an important part of the automobile power assembly, and bears the force and moment transmitted by the power assembly, so that the whole automobile runs stably. One end of the swing support is connected below a gearbox of the automobile; the other end is inserted into a circular support in the subframe of the vehicle and is connected to the circular support by means of bolts. It is used with the circular support in a matching way, and plays a role in connection, buffering, vibration reduction and limiting. The design of the swing support is directly related to the connection strength, comfort and stability of the gearbox and the frame.
The pivot bearing connects the transmission case to the circular bearing in the subframe, which requires high connection strength. In addition to the durability requirements for the entire vehicle, it is also necessary to meet the test requirements for static strength and dynamic strength (the welr test). The driving motor has small vibration excitation but large torque. Because the motor output torque of the electric vehicle is large, the swing support is required to have enough static connection strength and dynamic strength. Particularly, when the motor is started and stopped, the motor drives the gearbox to generate large movement along the direction of the whole vehicle.
The swing support is as the bridge of being connected of sub vehicle frame and gearbox, and the design difficult point lies in joint strength and fit clearance:
a) the connection strength of the bracket and the gearbox; b) the fit clearance of the connecting rod and the circular support in the auxiliary frame; c) the static and dynamic strength of the connecting rod itself (the willer characteristic); d) the gap between the connecting position of the connecting rod and the gearbox; e) the displacement and the pressing force requirements of the bushing pressed into the bracket are met; f) the electric vehicle has large torque and light weight, and meets the requirements on the weight and the material thickness of the product.
In addition, in order to control the displacement of the power assembly under the large torque, the swing support has strong enough limiting capacity. If the supporting and limiting capacity is insufficient, the large displacement of the power assembly under large torque is easy to impact peripheral parts, and the power assembly can shake obviously when the torque changes rapidly, so that the endurance and fatigue properties of the power assembly need to be ensured.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming prior art's defect, providing a pure electric vehicles swing supporting, satisfying under the assembly requirement, promoted the static state of product and drawn compression strength and developments and drawn compression strength (the weler intensity), satisfied the joint strength requirement of whole car.
The technical scheme for realizing the purpose is as follows: a pure electric vehicles swing support, includes bush, support and connecting rod, wherein:
the bushing comprises an inner sleeve, a rubber layer and an outer sleeve which are coaxially arranged from inside to outside in sequence;
the support comprises a cylinder and two side lugs, the two side lugs are arranged on two radial sides of the cylinder in a one-to-one correspondence mode, each side lug is provided with a transmission case connecting hole which is communicated up and down, and the upper surface and the lower surface of each side lug are provided with knurling layers;
one end of the connecting rod is provided with a boss through hole which is communicated up and down, and the other end of the connecting rod is inwards provided with a U-shaped fork opening; the middle part of the connecting rod is provided with a positioning pin connecting hole which is communicated up and down; the front side wall and the rear side wall of the U-shaped fork opening are respectively provided with a lining connecting hole which is communicated from front to back, and the lining connecting holes on the front side wall and the rear side wall of the U-shaped fork opening are coaxially arranged;
the bracket is arranged in the U-shaped fork opening;
the bushing is sleeved in the cylinder of the bracket, and the outer sleeve of the bushing is in interference fit with the cylinder of the bracket;
the front end and the rear end of the inner sleeve of the lining are fixed with the lining connecting holes on the front side wall and the rear side wall of the U-shaped fork opening in a one-to-one correspondence mode through bolts and nuts.
In the pure electric vehicle swing support, the front end face and the rear end face of the inner sleeve of the bushing are respectively provided with the knurled layer.
The pure electric vehicle swing support is characterized in that the outer sleeve and the inner sleeve of the bushing are respectively of a straight cylinder structure, and the rubber layer of the bushing is of a straight cylinder structure which is uniform in the circumferential direction.
According to the swing support of the pure electric vehicle, the bottom of the U-shaped fork opening is formed by sequentially connecting three sections of circular arcs.
The utility model discloses a pure electric vehicles swinging support, satisfying under the assembly requirement, promoted the static state of product and drawn the compression strength and draw the compression strength (the weler intensity) with the developments, satisfied the joint strength requirement of whole car.
Drawings
FIG. 1 is a three-dimensional structure diagram of a swing bearing of a pure electric vehicle according to the present invention;
fig. 2 is a top view of the pure electric vehicle swing support of the present invention;
FIG. 3 is a cross-sectional view of a pure electric vehicle swing support of the present invention;
FIG. 4 is a perspective view of the bushing of the swing bearing of the blade electric vehicle according to the present invention;
fig. 5 is a cross-sectional view of the bushing of the pure electric vehicle swing bearing of the present invention;
fig. 6 is a three-dimensional structure diagram of the bracket of the swing bearing of the pure electric vehicle of the present invention;
fig. 7 is a cross-sectional view of a bracket of a pure electric vehicle swing support of the present invention;
fig. 8 is a partial enlarged view of a portion a of fig. 7;
fig. 9 is a three-dimensional structure diagram of the connecting rod of the swing bearing of the pure electric vehicle of the present invention;
fig. 10 is a bottom view of the connecting rod of the pure electric vehicle swing support of the present invention;
FIG. 11 is a schematic view of a prior art yoke of a connecting rod;
fig. 12 is a schematic structural diagram of a fork of a connecting rod of a pure electric vehicle swing support according to the present invention.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the following detailed description is provided with reference to the accompanying drawings:
referring to fig. 1 to 12, a swing support for a pure electric vehicle according to a preferred embodiment of the present invention includes a bushing 5, a bracket 2 and a connecting rod 1.
Referring to fig. 4 and 5, the bushing 5 includes an inner sleeve 51, a rubber layer 52 and an outer sleeve 53 coaxially disposed from inside to outside, and the front and rear end surfaces of the inner sleeve 51 are respectively provided with a knurled layer 54.
Referring to fig. 6, 7 and 8, the bracket 2 includes a cylinder 21 and two side lugs 22, the two side lugs 22 are correspondingly arranged on two radial sides of the cylinder 21, each side lug 22 is provided with a vertically through gearbox connecting hole 23, and the upper and lower surfaces of each side lug 22 are provided with knurled layers 24; support 2 adopts the aluminium material, and the supporting structure includes the hole phi of pressure equipment bush 5 and 2 apertures of connecting the gearbox, and the laminating and the frictional force of contact surface can be increased to the knurling layer 24 of the side ear 22 surface region A around the gearbox connecting hole 23, and drum 21 and side ear 22's linking region B, its design angle X and fillet R are related to the quiet intensity of being connected and the dynamic strength of support, through FE analysis and experimental verification, can reach optimum support intensity.
Referring to fig. 9 and 10, one end of the connecting rod 1 is provided with a boss through hole 11 which is through up and down, and the other end of the connecting rod 1 is provided with a U-shaped fork 12 inwards; the middle part of the connecting rod 1 is provided with a positioning pin connecting hole 13 which is vertically communicated; the front side wall and the rear side wall of the U-shaped fork opening 12 are respectively provided with a lining connecting hole 14 which is communicated with the front side and the rear side, and the lining connecting holes 14 on the front side wall and the rear side wall of the U-shaped fork opening 12 are coaxially arranged.
Referring back to fig. 1, 2 and 3, the bracket 2 is disposed in the U-shaped fork 12; the bush 5 is sleeved in the cylinder 21 of the bracket 2, and the outer sleeve 53 of the bush 5 is in interference fit with the cylinder 21 of the bracket 2; the front and rear ends of the inner sleeve 51 of the bush 5 are fixed with the bush connecting holes 14 on the front and rear side walls of the U-shaped fork 12 in a one-to-one correspondence by the bolts 3 and the nuts 4.
The outer sleeve 53 and the inner sleeve 51 of the bushing are respectively of a straight cylinder structure, and the rubber layer 52 of the bushing is of a straight cylinder structure which is uniform in the circumferential direction. The outer sleeve 53 is made of plastic and is of a simple thin-wall straight-cylinder structure, and is in interference fit with the outer support 2, so that the inner rubber layer 52 can be protected from being cut by the metal of the auxiliary frame. The diameter reducing process of using the metal outer sleeve before press mounting is reduced. The plastic material also accords with the lightweight concept of the automobile. The inner sleeve 51 is made of iron, high in connection strength, formed by cold heading, and is of a straight-tube structure, when the inner sleeve is screwed down by bolts and nuts, the pressing effect of the U-shaped fork 12 is brought, meanwhile, the knurled layers 54 on the front end face and the rear end face of the inner sleeve 51 are designed, and the knurled layers are pressed into the inner surface of the U-shaped fork 12 when the inner sleeve is screwed down, so that slipping between the inner sleeve 51 and the inner wall of the U-shaped fork 12 is avoided, and the axial fastening effect of the inner sleeve and the inner surface of the U-shaped fork. The bushing 5 acts as a hinge, damping vibration and reducing noise with respect to the metal structure. The rubber layer 52 is a straight cylinder structure with uniform circumferential direction, and is vulcanized, bonded and molded with the inner sleeve 51 and the outer sleeve 53 through the rubber layer 52. The dynamic stiffness and the static stiffness are uniform and consistent and are not divided into directions, the diameter of the bush 5 does not need to be reduced before being pressed into the support 2, the circumferential error prevention is not needed, and the cost is reduced.
The connecting rod 1 is formed by iron punching, the weight of the connecting rod can be reduced, and the connecting strength is a design key. The connecting rod 1 is one of the key structures of the swing support, bears the dynamic load of a gearbox and the load of a road surface transmitted by a subframe, and the static connection strength and the dynamic strength of the connecting rod are design keys. The U-shaped fork 12 is positioned to be connected to the bottom end of the gearbox by means of the bracket 2 and the bushing 5.
Referring to fig. 11 and 12, the design of the U-shaped fork 12 of the swing support relates to the dynamic and static strength of the component, and the bottom of the fork position in the prior art only has two circular arcs r at the corners0(see fig. 11), the strain cannot meet the requirements of the whole vehicle. The utility model discloses an optimize fork mouth department design, change the bottom of U-shaped fork mouth into and connect gradually by three-section circular arc R1, R2, R3 and form, FE finite element analysis optimizes the sideThe case reduces the stress strain value of the dangerous interface under the working conditions of tension and compression of the product. The static strength and dynamic strength tests of the rack and the actual road test results of customers show that the swing support connecting rod of the scheme 1 improves the dynamic and static strength and ensures the durable service life of the swing support. The utility model discloses a stress and strain value have been reduced to this kind of design, finally, have promoted connecting rod sound intensity requirement by a wide margin, have satisfied the sound intensity requirement of the big moment of torsion load of electric motor car.
The utility model discloses a pure electric vehicles swing support, assembly process are pressed the bush 5 after vulcanizing into the drum 21 of support 2, link together connecting rod 1 and bush 5's endotheca 51 with 3 bolts and 4 nuts again.
When the pure electric vehicle swing support is used, the position of the U-shaped fork opening 12 of the connecting rod 1 is connected to the bottom end of the gearbox through the gearbox connecting hole 23; the other end is inserted into a circular support in the auxiliary frame of the automobile, and meanwhile, the boss through hole 11 is connected with the circular support through bolts, and the circular support is matched with the boss through hole for use, plays a role in connection, buffering, vibration reduction and limiting.
To sum up, the utility model discloses a pure electric vehicles swing support, satisfying under the assembly requirement, promoted the static state of product and drawn and press intensity and developments and drawn and press intensity (the weler intensity), satisfied the joint strength requirement of whole car.
It will be appreciated by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as limitations of the present invention, and that changes and modifications to the above described embodiments will fall within the scope of the claims of the present invention as long as they are within the spirit and scope of the present invention.
Claims (4)
1. The utility model provides a pure electric vehicles swing support which characterized in that, includes bush, support and connecting rod, wherein:
the bushing comprises an inner sleeve, a rubber layer and an outer sleeve which are coaxially arranged from inside to outside in sequence;
the support comprises a cylinder and two side lugs, the two side lugs are arranged on two radial sides of the cylinder in a one-to-one correspondence mode, each side lug is provided with a transmission case connecting hole which is communicated up and down, and the upper surface and the lower surface of each side lug are provided with knurling layers;
one end of the connecting rod is provided with a boss through hole which is communicated up and down, and the other end of the connecting rod is inwards provided with a U-shaped fork opening; the middle part of the connecting rod is provided with a positioning pin connecting hole which is communicated up and down; the front side wall and the rear side wall of the U-shaped fork opening are respectively provided with a lining connecting hole which is communicated from front to back, and the lining connecting holes on the front side wall and the rear side wall of the U-shaped fork opening are coaxially arranged;
the bracket is arranged in the U-shaped fork opening;
the bushing is sleeved in the cylinder of the bracket, and the outer sleeve of the bushing is in interference fit with the cylinder of the bracket;
the front end and the rear end of the inner sleeve of the lining are fixed with the lining connecting holes on the front side wall and the rear side wall of the U-shaped fork opening in a one-to-one correspondence mode through bolts and nuts.
2. A pure electric vehicle swing support according to claim 1, characterized in that the front and rear end surfaces of the inner sleeve of the bushing are respectively provided with a knurled layer.
3. The pure electric vehicle swing support according to claim 1, wherein the outer sleeve and the inner sleeve of the bushing are respectively of a straight cylinder structure, and the rubber layer of the bushing is of a straight cylinder structure with uniform circumferential direction.
4. A pure electric vehicle swing support according to claim 1, characterized in that the bottom of the U-shaped fork opening is formed by sequentially connecting three circular arcs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020383460.8U CN212195090U (en) | 2020-03-24 | 2020-03-24 | Swing support of pure electric vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020383460.8U CN212195090U (en) | 2020-03-24 | 2020-03-24 | Swing support of pure electric vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212195090U true CN212195090U (en) | 2020-12-22 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020383460.8U Active CN212195090U (en) | 2020-03-24 | 2020-03-24 | Swing support of pure electric vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212195090U (en) |
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2020
- 2020-03-24 CN CN202020383460.8U patent/CN212195090U/en active Active
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