CN209813697U

CN209813697U - Cylinder type left suspension structure of pure electric vehicle

Info

Publication number: CN209813697U
Application number: CN201920127044.9U
Authority: CN
Inventors: 王正亚; 彭庆丰; 李陈勇; 邓晓光
Original assignee: Zhejiang Hozon New Energy Automobile Co Ltd
Current assignee: Hozon New Energy Automobile Co Ltd
Priority date: 2019-01-25
Filing date: 2019-01-25
Publication date: 2019-12-20
Anticipated expiration: 2029-01-25

Abstract

The utility model relates to an electric automobile suspension system technical field discloses a pure electric vehicles's left suspension structure of cylinder, including the cartridge type outer tube, connect in the radial automobile body collateral branch frame, the one end that sets up of extension of cartridge type outer tube periphery lateral wall are located the other end stretches out in the cartridge type outer tube last skeleton, the level of cartridge type outer tube up end are located the cartridge type outer tube up end pass through the bolt with last skeleton joint's trailing arm, one end are located the other end stretches out in the cartridge type outer tube lower skeleton and the position of terminal surface under the cartridge type outer tube respectively with go up the skeleton with the rubber bush that lower skeleton is connected. The utility model discloses have the same spacing ability in whole car coordinate X, Y direction, have power assembly weight and inertial force bearing capacity in whole car coordinate Z direction, whole antitorque spacing ability is strong, and the vibration isolation performance is good.

Description

Cylinder type left suspension structure of pure electric vehicle

Technical Field

The utility model relates to an electric automobile suspension system technical field especially relates to a left suspension structure of pure electric vehicles's cylinder.

Background

For a traditional fuel vehicle, the focus of the matching optimization of a suspension system is the torque fluctuation of a multi-cylinder engine, and a common torque shaft arrangement scheme and a common mode decoupling concept are both used for relieving the vehicle body vibration caused by the torque fluctuation. For a pure electric vehicle, the torque fluctuation of a motor is far lower than that of an engine, the torque fluctuation is mainly under the working conditions of creeping, accelerating, decelerating and braking, the frequency of the motor is not obviously related to the rotation order of the engine, but the torque of the motor is obviously greater than that of the engine, and under the Tipin/out working condition in actual application, the torque value of the motor is rapidly changed, and the torque can be reversely rotated from positive to negative in a very short time when a braking energy recovery function is started, so that a suspension system can bear a load which is rapidly changed greatly. Therefore, the focus of pure electric vehicle suspension matching optimization is the torque of the power assembly, so that the suspension system needs to have enough anti-torsion limiting capacity, the displacement of the power assembly is ensured to be in a reasonable range under the action of large torque, and the optimization of vibration isolation performance can be considered on the basis.

In the conventional left suspension structure (such as the left suspension described in the patent document with publication number CN102092268A and the patent document with publication number CN 107972467A), the rubber bushing has a large gap in the linear sections in the X direction and the Z direction of the whole vehicle coordinate, so that the displacement of the elastic central point of the suspension bushing in the constant torque area (the rotation speed interval where the peak torque of the motor exists) is large, and the displacement of the power assembly cannot be well limited, which causes the power assembly to have a shaking abnormal sound at the moment when the motor enters the constant torque area or stops.

In order to improve the limit and shock absorption in the X, Y, Z direction of the whole vehicle to a certain extent, patent document with publication number CN102011831B discloses a "left suspension shock absorption device for an electric vehicle motor", which comprises a bracket arm bracket and a shock absorption bracket mounted on the bracket arm bracket, wherein an inner sleeve is mounted on the shock absorption bracket, the inner sleeve and the shock absorption bracket are connected into a whole through a vibration isolation rubber body after vulcanization, the inner sleeve is extruded and molded by aluminum 6061 and is arranged on the bracket arm bracket through a fixing bolt, and the shock absorption bracket is formed by stamping and welding a support frame and a bottom plate; the support frame adopts the Q235 steel, and the bottom plate adopts the St12 steel, the trailing arm support is by the support, and two first cushions and a second cushion are through punching press weld forming, above-mentioned electric automobile motor left side suspension damping device simple structure not only, the manufacturing of being convenient for, the assembly of being convenient for moreover, the vibration isolation performance is superior, and durability is high, but the spacing ability of rubber vibration isolator in whole car X, Y, Z direction remains further improvement, especially the spacing of whole car Z direction.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is not enough to above-mentioned prior art, provide one kind and have the same spacing ability in whole car coordinate X, Y direction, have power assembly weight and inertial force bearing capacity in whole car coordinate Z direction, whole antitorque spacing ability is strong, the pure electric vehicles's that the vibration isolation performance is good left suspension structure of cylinder.

In order to realize the purpose, the utility model discloses a technical scheme be:

the utility model provides a pure electric vehicles's cylinder left side suspension structure, include the cartridge type outer tube, connect in the radial automobile body collateral branch frame, the one end that extends the setting of cartridge type outer tube periphery lateral wall are located the other end stretches out in the cartridge type outer tube last terminal surface last skeleton, the level are located cartridge type outer tube up end pass through the bolt with last bracket arm, the one end of skeleton connection are located the other end stretches out in the cartridge type outer tube lower skeleton and the position of terminal surface under the cartridge type outer tube respectively with go up the skeleton with the rubber bush that the skeleton is connected down.

In the scheme, the connection matching mode and the assembly direction of the supporting arm and the cylindrical outer pipe in the prior art are changed, so that the anti-torsion limiting capacity strength of each part and direction of a rubber bushing used by the suspension system is more suitable for the requirement of limiting the displacement change of the power assembly in the whole vehicle X, Y, Z direction, when the supporting arm is displaced along with the power assembly in the whole vehicle X, Y, Z direction, the upper framework is driven by a bolt to be displaced and changed, and the upper framework is limited by the rubber bushing, wherein the Z-direction power assembly displacement of the whole vehicle is caused by the inertia force and the gravity of the power assembly, the Z-direction power assembly displacement limiting capacity of the whole vehicle depends on the rigidity and the size of the rubber bushing in the axial direction of the cylindrical outer pipe and the axial matching tightness degree of the upper framework and the cylindrical outer pipe, and the power assembly displacement in the whole vehicle X, Y direction is caused by the torque of the power, the displacement limiting capacity of the power assembly in the direction of the whole vehicle X, Y depends on the radial rigidity of the rubber bushing on the cylindrical outer tube, the size and the radial fit tightness degree of the upper framework and the cylindrical outer tube, when the central axis of the upper framework and the axis of the cylindrical outer tube are on the same straight line, the rubber bushing can have the same rigidity in the X and Y directions of the whole vehicle, the upper framework is enabled to obtain balanced limiting capacity, the upper framework is enabled not to be easily loosened, the displacement of the power assembly is enabled to be always kept within a reasonable range, the possibility that the power assembly shakes due to the large torque of a motor is reduced, and the integral anti-torsion limiting capacity is enhanced. In addition, the rubber bushing has a certain vibration isolation effect, when the upper framework is in sealing connection with the cylindrical outer pipe through the thick rubber layer, the good vibration isolation performance can be guaranteed, and the problem of noise, vibration and harshness (NVH) of the pure electric vehicle can be solved.

Furthermore, the vehicle body side support is provided with a vehicle body mounting hole which penetrates through the cylindrical outer pipe in the axial direction, and the support arm is provided with a movable main connecting through hole which penetrates through the cylindrical outer pipe in the axial direction. Make things convenient for left suspension and automobile body and powertrain's quick connection.

Further, go up the skeleton and be located one end in the cartridge type outer tube is the infundibulate, rubber bush through vulcanization technology with go up the skeleton with lower skeleton fixed connection, rubber bush with it is located to go up the skeleton the junction of one end in the cartridge type outer tube is the infundibulate. The contact area between the rubber bushing and the upper framework is increased, so that the sealing state between the rubber bushing and the upper framework is better guaranteed, the upper framework is not easy to loosen, and the anti-torsion limiting capability is stronger.

Further, go up the skeleton from top to bottom and include extension portion, stop part and connecting portion in proper order, extension portion one end is located outside the tube-type outer tube and be equipped with the edge the bolt hole that the axial of tube-type outer tube was seted up, the other end is located tube-type outer tube in-connection stop part, stop part edge the radial extension setting of tube-type outer tube is used for preventing go up the skeleton and follow the tube-type outer tube up end is deviate from.

Further, the connecting portion is funnel-shaped.

Further, the rubber bushings are connected between the upper end face of the cylindrical outer pipe and the blocking portion and between the connecting portion and the lower framework through a vulcanization process. The stop part, the connecting part are funnel-shaped and the rubber bushing is connected in a matching mode at multiple positions through a vulcanization process, the limit of the upper framework is greatly enhanced, the upper framework is connected with the supporting arm through a bolt, and the supporting arm is connected with the power assembly, so that the power assembly is finally guaranteed to be always in a reasonable range in the displacement in the direction of the whole vehicle X, Y, Z.

Furthermore, one side of the supporting arm, facing the upper end face of the cylindrical outer pipe, is provided with a registration groove, a bolt connecting through hole which axially penetrates through the supporting arm along the cylindrical outer pipe is formed in the registration groove, and one end, extending out of the upper end face of the cylindrical outer pipe, of the upper framework is limited in the registration groove and is connected with the supporting arm through a bolt penetrating through the bolt connecting through hole. The alignment groove facilitates the better matching of the supporting arm and the upper framework, facilitates the quick installation of the supporting arm and the upper framework, and is also beneficial to improving the connection stability of the supporting arm and the upper framework.

Furthermore, the upper end face of the cylindrical outer pipe is connected with an anti-collision pad. The collision abnormal sound caused by overlarge displacement of the power assembly in the Z-axis direction of the whole vehicle is favorably reduced.

Further, the automobile body side support is equipped with a plurality ofly, evenly distributed in cartridge type outer tube periphery lateral wall, the automobile body side support include outer tube connecting portion and with outer tube connecting portion one end integrated into one piece's automobile body connecting portion, outer tube connecting portion follow cartridge type outer tube axial extension, its one side weld in cartridge type outer tube periphery lateral wall, automobile body connecting portion's free end is followed cartridge type outer tube radial extension and be equipped with the edge the automobile body mounting hole that cartridge type outer tube axial runs through. The design of automobile body side support is favorable to guaranteeing the good connection performance of automobile body side support, better forms the automobile body with the left suspension of this embodiment and stabilizes fixedly, has longer life.

Further, lower skeleton include with terminal surface backstop cooperation is used for avoiding under the cartridge type outer tube lower terminal surface backstop the skeleton is followed backstop portion that terminal surface deviates from under the cartridge type outer tube and with backstop portion keeps away from side fender portion of cartridge type outer tube week lateral wall one end body coupling, backstop portion with side fender portion junction towards one side of cartridge type outer tube inside is equipped with arc portion, arc portion with the rubber bush butt. The backstop portion can avoid the skeleton to deviate from down, and arc portion and rubber bush butt can form the butt and connect the force, and when guaranteeing to vulcanize, the spacing skeleton of going up that rubber bush can be better.

After the technical scheme is adopted, the beneficial effects of the utility model are that: compare traditional structure and more possess sufficient antitorque spacing ability, go up the skeleton and receive skeleton and rubber bush effect embedded inside the barrel-type outer tube down, have the same spacing ability in whole car coordinate X, Y direction, at whole car coordinate Z to mainly bearing power assembly weight and Z to inertial force, possess better vibration isolation performance simultaneously, can improve electric automobile's NVH problem.

Drawings

In order to more clearly illustrate embodiments of the present invention or the technical solutions of the prior art, the drawings are as follows:

fig. 1 is a side cross-sectional view of a cylindrical left suspension structure of a pure electric vehicle according to embodiment 1 of the present invention;

fig. 2 is a schematic view of an overall structure of a cylindrical left suspension structure of a pure electric vehicle according to embodiment 2 of the present invention;

fig. 3 is a side sectional view of a preferred left suspension structure according to embodiment 2 of the present invention;

fig. 4 is a schematic view of a split of a preferred left suspension structure in embodiment 2 of the present invention.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

Example 1

As shown in fig. 1, this embodiment provides a pure electric vehicles's left suspension structure of cylinder, including cartridge type outer tube 1, connect in car body side support 2, the one end that 1 periphery lateral wall of cartridge type outer tube radially extends the setting are located the other end stretches out in the cartridge type outer tube 1 the last skeleton 3, the level of 1 up end of cartridge type outer tube are located 1 up end of cartridge type outer tube pass through the bolt with trailing arm 4, the one end that last skeleton 3 is connected are located 1 other end stretches out in the cartridge type outer tube 1 lower skeleton 5 and the position of terminal surface under the cartridge type outer tube 1 in the cartridge type outer tube respectively with go up skeleton 3 with the rubber bush 6 that skeleton 5 is connected down, lower skeleton 5 and rubber bush 6 stabilize together seal up skeleton 3 in cartridge type outer tube 1.

Specifically, the cross section of the cylindrical outer pipe 1 is regular and circular, a plurality of vehicle body side supports 2 can be arranged, the vehicle body side supports 2 are used for being fixed with a vehicle body through mounting holes in the vehicle body side supports, and the support arms 4 are used for being connected with a power assembly;

the left suspension structure of the embodiment changes the connection matching mode and the assembly direction of the bracket arm 4 and the cylindrical outer pipe 1 in the prior art, so that the anti-torsion limiting capacity strength of each part and direction of the rubber bushing 6 used by the suspension system is more suitable for limiting the displacement of the power assembly in the direction of the whole vehicle X, Y, Z under the action of large torque, the plane of the displacement in the direction of the power assembly X, Y is parallel to the cross section of the cylindrical outer pipe 1, and the X, Y direction limiting capacity can be designed more uniformly;

specifically, the design of the upper framework 3 is added, when the supporting arm 4 displaces along with the power assembly in the direction of the whole vehicle X, Y, Z, the upper framework 3 is driven by the bolt to displace, and the upper framework 3 is limited by the rubber bushing 6 in each direction, wherein, the power assembly displacement in the Z direction of the whole vehicle is caused by the inertia force and gravity of the power assembly, the power assembly displacement limiting capability in the Z direction of the whole vehicle depends on the rigidity and the size of the rubber bushing 6 in the axial direction of the cylindrical outer tube 1 and the axial matching tightness degree of the upper framework 3 and the cylindrical outer tube 1, the power assembly displacement in the whole vehicle X, Y direction is caused by the torque of the power assembly, the power assembly displacement limiting capability in the whole vehicle X, Y direction depends on the rigidity and the size of the rubber bushing 6 in the radial direction of the cylindrical outer tube 1 and the radial matching tightness degree of the upper framework 3 and the cylindrical outer tube 1, when the central axis of the upper framework 3 and the axis of the cylindrical outer tube 1 are, the rubber bushing 6 has the same rigidity in the X and Y directions of the whole vehicle, so that the upper framework 3 can obtain balanced limiting capacity, the upper framework 3 is not easy to loosen, finally, the displacement of the power assembly is always kept in a reasonable range, the possibility of shaking of the power assembly caused by large torque of a motor is reduced, and the integral torsion-resistant limiting capacity is enhanced;

in addition, rubber bush 6 itself has certain vibration isolation effect, when last skeleton 3 through thicker solid rubber layer and cylindrical outer tube 1 sealing connection, can guarantee better vibration isolation performance, can solve pure electric vehicles's NVH (noise, vibration and acoustic vibration roughness) problem in the embodiment of summarizing.

Example 2

In this embodiment, as shown in fig. 2, a vehicle body mounting hole 21 that penetrates in the axial direction of the cylindrical outer tube 1 is provided in the vehicle body-side bracket 2, and a movable main connecting through hole 41 that penetrates in the axial direction of the cylindrical outer tube 1 is provided in the trailing arm 4. Make things convenient for left suspension and automobile body and power assembly's quick connection, the guarantee automobile body, power assembly and the position relation of 1 of section of thick bamboo type outer tube are in more stable stress state, reduce the power assembly and appear the condition of rocking by a wide margin because of big moment of torsion, improve whole antitorque spacing ability.

Preferably, go up skeleton 3 and be located one end in the section of thick bamboo type outer tube 1 is the infundibulate, rubber bush 6 through vulcanization technology with go up skeleton 3 with skeleton 5 fixed connection down, rubber bush 6 with it is located to go up skeleton 3 the junction of one end in the section of thick bamboo type outer tube 1 is the infundibulate. The design of infundibulate has increased rubber bush 6 and last skeleton 3's area of contact to be favorable to better assurance rubber bush 6 and the encapsulated situation of last skeleton 3, go up skeleton 3 and be more difficult not hard up, antitorque spacing ability is stronger.

More specifically, as shown in fig. 3, the upper frame 3 sequentially includes a protruding portion 31, a blocking portion 32 and a connecting portion 33 from top to bottom, one end of the protruding portion 31 is located outside the cylindrical outer tube 1 and is provided with an edge, a bolt hole 311 is axially formed in the cylindrical outer tube 1, a central axis of the bolt hole 311 and a central axis of the protruding portion 31 are preferably the same straight line, the other end of the protruding portion 31 is located inside the cylindrical outer tube 1 and connected to the blocking portion 32, the blocking portion 32 is located along the cylindrical outer tube 1 radially extends to be provided for preventing the upper frame 3 from being disengaged from the upper end surface of the cylindrical outer tube 1.

The connecting portion 33 is funnel-shaped.

The rubber bushing 6 is connected between the upper end surface of the cylindrical outer tube 1 and the stopper 32 and between the connecting portion 33 and the lower frame 5 through a vulcanization process. Namely, the rubber bush 6 wraps the part of the upper framework 3 positioned in the cylindrical outer pipe 1 and firmly fixes the upper framework in the cylindrical outer pipe 1, so that the degree of freedom of the upper framework in all directions is limited. Particularly, a rubber bushing 6 is also arranged between the inner surface of the upper end surface of the cylindrical outer tube 1 and the blocking part 32, which is beneficial to increasing the limiting capacity of the rubber bushing 6 on the upper framework 3.

The stop part 32 and the connecting part 33 are funnel-shaped, the rubber bushing 6 is matched and connected in multiple positions through a vulcanization process, the limit of the upper framework 3 is greatly enhanced, the upper framework 3 is connected with the supporting arm 4 through a bolt, and the supporting arm 4 is connected with the power assembly, so that the power assembly is finally guaranteed to be always in a reasonable range in the displacement amount of the whole vehicle X, Y, Z.

As shown in fig. 4, a positioning groove 42 is formed in one side of the supporting arm 4 facing the upper end surface of the cylindrical outer tube 1, a bolt connecting through hole penetrating through the supporting arm 4 along the axial direction of the cylindrical outer tube 1 is formed in the positioning groove 42, and one end, extending out of the upper end surface of the cylindrical outer tube 1, of the upper framework 3 is limited in the positioning groove 42 and is connected with the supporting arm 4 through a bolt penetrating through the bolt connecting through hole. The counterpoint groove 42 makes things convenient for better and the last skeleton 3 cooperation of trailing arm 4, makes things convenient for quick counterpoint installation between them, has increased spacing relation between the two simultaneously, is favorable to improving the steadiness that both connect, and the opening size of preferred counterpoint groove 42 slightly is less than and stretches out last skeleton 3 the size of the terminal surface of the one end of 1 up end of section of thick bamboo type outer tube to make trailing arm 4 and last skeleton 3 junction can comparatively inseparable cooperation.

The upper end surface of the cylindrical outer pipe 1 is connected with an anti-collision pad 11. The collision abnormal sound caused by overlarge displacement of the power assembly in the Z-axis direction of the whole vehicle is favorably reduced.

The utility model discloses a car body side support, including tubular outer tube 1 periphery lateral wall, car body side support 2 includes outer tube connecting portion 22 and with outer tube connecting portion 22 one end integrated into one piece's automobile body connecting portion 23, outer tube connecting portion 22 is followed 1 axial extension of tubular outer tube, outer tube connecting portion 22 side weld in 1 periphery lateral wall of tubular outer tube, except that the welding also can integrated into one piece also can be fixed through the screw connection, the free end of automobile body connecting portion 23 is followed 1 radial extension of tubular outer tube and be equipped with the edge the automobile body mounting hole that 1 axial of tubular outer tube runs through. The design of the vehicle body side bracket 2 is beneficial to ensuring the excellent connection performance of the vehicle body side bracket 2, and the vehicle body and the left suspension of the embodiment are stably fixed, so that the service life is longer.

Lower skeleton 5 include with terminal surface backstop cooperation is used for avoiding under 1 of cartridge type outer tube 5 follow backstop 51 that the terminal surface was deviate from under 1 of cartridge type outer tube and with backstop 51 is kept away from 1 lateral wall one end an organic whole side of cartridge type outer tube keeps off portion 52, backstop 51 with side keep off 52 junction towards one side of 1 inside of cartridge type outer tube is equipped with arc portion 512, arc portion 512 with 6 butts of rubber bush. The stopping part 51 can prevent the lower framework 5 from coming off, the arc-shaped part 512 can be abutted against the rubber bushing 6 to form abutting force, and the rubber bushing 6 can be better limited to the upper framework 3 during vulcanization.

To sum up, the left suspension structure of this embodiment can be better the restriction power assembly at the displacement in the constant torque district, keeps the displacement change of power assembly reasonable scope, reduces the power assembly and rocks the production of the abnormal sound, still possesses better vibration isolation performance simultaneously, can improve electric automobile NVH problem.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. The utility model provides a pure electric vehicles's cylinder left side suspension structure, its characterized in that, including the cartridge type outer tube, connect in the radial automobile body collateral branch frame, the one end that extends the setting of cartridge type outer tube periphery lateral wall are located the other end stretches out in the cartridge type outer tube last end go up skeleton, level locate cartridge type outer tube up end pass through the bolt with go up the trailing arm, the one end of skeleton connection and be located the other end stretches out in the cartridge type outer tube lower skeleton of terminal surface and being located in the cartridge type outer tube respectively with go up the skeleton with the rubber bush that the skeleton is connected down.

2. The left drum-type suspension structure of the pure electric vehicle according to claim 1, wherein a vehicle body mounting hole axially penetrating through the drum-type outer tube is formed in the vehicle body side bracket, and a main moving connecting through hole axially penetrating through the drum-type outer tube is formed in the trailing arm.

3. The left drum-type suspension structure of the pure electric vehicle according to claim 1, wherein an end of the upper frame located in the outer drum-type tube is funnel-shaped, the rubber bushing is fixedly connected with the upper frame and the lower frame through a vulcanization process, and a joint of the rubber bushing and an end of the upper frame located in the outer drum-type tube is funnel-shaped.

4. The left barrel-type suspension structure of the pure electric vehicle according to claim 1, wherein the upper frame sequentially comprises a protruding portion, a blocking portion and a connecting portion from top to bottom, one end of the protruding portion is located outside the barrel-type outer tube and is provided with a bolt hole formed along the axial direction of the barrel-type outer tube, the other end of the protruding portion is located inside the barrel-type outer tube and is connected with the blocking portion, and the blocking portion is arranged along the radial extension of the barrel-type outer tube and is used for preventing the upper frame from being disengaged from the upper end face of the barrel-type outer tube.

5. The left drum-type suspension structure of a pure electric vehicle as claimed in claim 4, wherein the connecting portion is funnel-shaped.

6. The left barrel-type suspension structure of the pure electric vehicle as claimed in claim 4, wherein the rubber bushing is connected between the upper end surface of the barrel-type outer tube and the blocking portion and between the connecting portion and the lower frame through a vulcanization process.

7. The left barrel-type suspension structure of the pure electric vehicle according to claim 1, wherein a positioning groove is formed in one side of the supporting arm facing the upper end surface of the barrel-type outer tube, a bolt connecting through hole penetrating through the supporting arm along the axial direction of the barrel-type outer tube is formed in the positioning groove, and one end of the upper framework, which extends out of the upper end surface of the barrel-type outer tube, is limited in the positioning groove and is connected with the supporting arm through a bolt penetrating through the bolt connecting through hole.

8. The left drum-type suspension structure of the pure electric vehicle as claimed in claim 1, wherein an anti-collision pad is connected to an upper end surface of the outer drum-type tube.

9. The pure electric vehicles's cylinder left suspension structure of claim 1, characterized in that, the bodyside bracket is provided with a plurality of, evenly distributed in the barrel-type outer tube periphery lateral wall, the bodyside bracket includes outer tube connecting portion and with outer tube connecting portion one end integrated into one piece's automobile body connecting portion, outer tube connecting portion along barrel-type outer tube axial extension, one side weld in barrel-type outer tube periphery lateral wall, automobile body connecting portion's free end is followed barrel-type outer tube radial extension and is equipped with along the automobile body mounting hole that barrel-type outer tube axial runs through.

10. The left drum-type suspension structure of a pure electric vehicle according to claim 1, wherein the lower frame includes a stopping portion cooperating with a stop of a lower end surface of the outer drum-type tube for preventing the lower frame from coming off the lower end surface of the outer drum-type tube, and a side stop portion integrally connected to an end of the stopping portion away from a peripheral side wall of the outer drum-type tube, a curved portion is disposed at a connection portion of the stopping portion and the side stop portion, the side stop portion facing the inside of the outer drum-type tube, and the curved portion abuts against the rubber bushing.