CN216331421U

CN216331421U - Left suspension of automobile

Info

Publication number: CN216331421U
Application number: CN202120943665.1U
Authority: CN
Inventors: 魏刚; 张峰; 李小庆; 冒薛军; 阮颖峰; 罗义朋; 李贺; 李后乐; 赵德刚
Original assignee: Zhejiang Geely Holding Group Co Ltd; Ningbo Yuanjing Auto Parts Co Ltd
Current assignee: Zhejiang Geely Holding Group Co Ltd; Ningbo Yuanjing Auto Parts Co Ltd
Priority date: 2021-04-28
Filing date: 2021-04-28
Publication date: 2022-04-19
Anticipated expiration: 2031-04-28

Abstract

The utility model provides an automobile left suspension, and belongs to the technical field of automobiles. It has solved the current poor problem of car left side suspension shock attenuation, noise reduction performance. This car left side suspension includes trailing arm and casing, the casing is installed on vehicle chassis's longeron, installation coupling assembling in the casing, coupling assembling is used for connecting casing and trailing arm, the one end of trailing arm is the installation end, the other end is the link, the installation end is connected with coupling assembling, the link bottom arch is used for the direct bellying of being connected with the derailleur of car, do not need rethread support and automotive transmission to be connected, required connecting piece quantity still less, thereby the cost of manufacturing and assembly has been saved, and the spare part quantity of transmission moment still less, the risk of inefficacy has been reduced, improve the shock attenuation effect, and then prevent secondary problems such as noise emission, and can cushion through coupling assembling and offset the derailleur shake that the trailing arm conducts power. The improved structure has good noise reduction and shock absorption performance.

Description

Left suspension of automobile

Technical Field

The utility model belongs to the technical field of machinery, and relates to an automobile left suspension.

Background

The automobile is one of the very popular vehicles in life nowadays, generally comprises four basic parts of an engine, a chassis, an automobile body and electrical equipment, and has the advantage of facilitating people to go out.

In the prior art, a suspension system is installed in a powertrain of an automobile, and mainly comprises: the engine suspension, the left suspension (transmission suspension) and the rear suspension (rear pull rod) are used for bidirectionally isolating the vibration force transmitted between the power assembly and the frame through the suspension system, so that vibration and noise in the vehicle are reduced.

The existing left suspension (transmission suspension) generally comprises a shell assembly, a supporting arm and a switching bracket, wherein the end shell assembly is connected with a vehicle body longitudinal beam and a vehicle wheel cover through bolts, one end of the supporting arm is connected with the shell assembly, the other end of the supporting arm is connected with the switching bracket through bolts, and the switching bracket is connected with a transmission through bolts.

The required spare part of foretell left suspension (derailleur suspension) is comparatively tedious, and assembly process is loaded down with trivial details, increases the cost of manufacturing and maintenance on foot, and in addition, the required spare part of transmission moment is more through switching support and trailing arm in proper order, and the moment transmission in-process is very probably because cooperation inefficacy influences its connection dynamic stiffness between the adapting unit, and left suspension is very probably out of work in the course of the work, and then leads to the car to reduce at the in-process left suspension shock attenuation effect of going, connects the problem that the noise acceleration appears easily in the inefficacy between each spare part.

Disclosure of Invention

The utility model aims to solve the problems in the prior art, and provides an automobile left suspension structure, which aims to solve the technical problems that: how to improve the noise reduction and shock absorption performance of the left suspension of the automobile.

The purpose of the utility model can be realized by the following technical scheme: the utility model provides a left suspension of car, includes the trailing arm and is used for the casing of being connected with the automobile body longeron, its characterized in that, install coupling assembling in the casing, trailing arm one end is the link, and the other end is the installation end, the protruding bellying that is used for being connected with automotive transmission that forms in link bottom, the installation end is connected with coupling assembling, coupling assembling can cushion the power of transmitting to trailing arm installation end.

This car left side suspension includes bracket arm and casing, the casing is installed on vehicle chassis's longeron, installation coupling assembling in the casing, coupling assembling is used for connecting casing and bracket arm, the one end of bracket arm is the installation end, the other end is the link, the installation end is connected with coupling assembling, the protruding bellying that forms in link bottom, the bracket arm directly is connected with the derailleur of car through the bellying, do not need rethread support and automotive transmission to be connected, required connecting piece quantity still less, thereby the cost of manufacturing and assembly has been saved, and the spare part quantity of transmission moment still less, the risk of inefficacy has been reduced, improve the shock attenuation effect, and then prevent to send noise scheduling secondary problem, and can cushion through coupling assembling and offset the derailleur shake that the bracket arm conducts, thereby it makes an uproar to improve left side suspension at vehicle driving process, the shock attenuation performance.

In the above left suspension of the automobile, the connecting end gradually increases in thickness from top to bottom.

The link top-down thickness crescent has reduced the link material, reduces manufacturing cost, in addition, guarantees that tremble power concentrates on the link top and transmits to the installation end with tremble power in the transmission process from bottom to top easier, takes place resonance when preventing that the link from receiving tremble power.

In foretell car left side suspension, the connector has been seted up to casing one side, coupling assembling includes the main spring that elastic material constitutes, the main spring joint is installed in the connector, just set up on the main spring and supply the support arm installation end male installing port, the protruding formation in installing port inner wall interval a plurality of can with the anti-skidding muscle that support arm installation end lateral wall is tight.

The connecting component comprises a main spring made of elastic material, a mounting opening is formed in the main spring, a mounting end of the supporting arm is inserted into the mounting opening of the main spring and is clamped and fixed with the inner wall of the mounting opening, so that the stability of connection with the connecting end of the supporting arm is ensured in the process that the main spring buffers and offsets the vibration force transmitted by the supporting arm, in addition, a plurality of anti-slip ribs are formed on the inner wall of the mounting opening in a protruding mode, when the mounting is carried out, the mounting end of the supporting arm is inserted into the mounting opening of the main spring and is tightly abutted to the anti-slip ribs on the inner wall of the mounting opening, in the running process of an automobile, the vibration force transmitted to the supporting arm by a transmission is transmitted into the main spring of the connecting component through the mounting end, the main spring unloads the vibration force of the part, and the anti-slip ribs in the mounting opening are always in a tightly abutted state with the mounting end of the supporting arm, the installation end of the bracket arm can be prevented from being separated from the installation opening in the running process of the automobile.

In the left suspension of the automobile, an annular channel is formed in the side wall, provided with the mounting opening, of the main spring, the annular channel is arranged outside the mounting opening in a surrounding manner, a cylindrical inner core is integrally formed in the annular channel in a vulcanization mode, and a plurality of through holes are formed in the side wall of the inner core.

The side wall of the main spring with the mounting opening is provided with an annular channel, the annular channel is arranged outside the mounting opening in a surrounding mode, a cylindrical inner core is integrally vulcanized in the annular channel, after vibration generated by the transmission is transmitted to the mounting end, the mounting end of the supporting arm can transmit part of the vibration force to the inner wall of the mounting opening, and the part of the vibration force is buffered and unloaded through the main spring; in addition, the inner core through the tube-shape can play the reinforcing effect to the installing port structure of main spring, guarantees the holistic structural strength of main spring, and has seted up a plurality of through-holes that supply liquid rubber to flow on the inner core lateral wall, guarantees that the inner core is at the vulcanization in-process, and liquid rubber can flow and be full of whole annular channel in annular channel through the through-hole, further guarantees the inner core and vulcanizes the joint strength of integrated into one piece in annular channel.

In foretell left side suspension of car, coupling assembling still includes vulcanizes the base, the protruding piece that leans on that forms a plurality of ability and connector top laminating in main spring top, the bottom with vulcanize the base and offset and lean on, main spring be close to the top and with lean on the protruding extension piece that can lean on with connector inside wall counterbalance of forming on the adjacent both sides lateral wall of piece, vulcanize base bottom and connector bottom and laminate mutually, it forms the card strip one that offsets tightly with connector both sides inner wall to vulcanize protruding formation on the base both sides lateral wall.

The connecting component also comprises a vulcanization base with rubber vulcanized on the outer surface, the two side bulges of the vulcanization base form a first clamping strip, the vulcanization base is clamped in the connecting port through the first clamping strip, the first clamping strip increases the contact area between the vulcanization base and the inner wall of the connecting port, and further ensures the stability of the clamping of the vulcanization base in the connecting port, the top of the main spring is abutted against the inner top wall of the connecting port, the bottom of the main spring is abutted against the vulcanization base, and the bottom of the vulcanization base is abutted against the inner bottom wall of the connecting port, so that the connecting component is installed in the shell in a longitudinal direction and limited, and the main spring can be assisted to buffer and unload the vibration generated by the transmission through the rubber vulcanized outside the vulcanization base, thereby ensuring the damping and noise reduction effects of the left suspension, the abutting force between the main spring and the inner top wall of the connecting port is improved, the gap formed by vibration between the top of the main spring and the inner top wall of the connecting port in the working process is reduced, and vibration and noise generated by collision between the top of the main spring and the inner top wall of the shell are reduced; in addition, the main spring is close to the top and with support to form the extension piece by leaning on the adjacent both sides lateral wall of piece, extends the piece and reduces the clearance between main spring both sides and the connector inside wall, reduces the potential energy of main spring collision connector inside wall to reduce the dynamics of main spring both sides and the collision of connector inside wall, and then play the shock attenuation, fall the effect of making an uproar.

In foretell car left side is hung, the both sides that the main spring is close to the bottom are buckled and are formed the bending, the bending inwards caves in and form the draw-in groove, the protruding card strip two that forms in both ends at vulcanization base top, bending one side is pegged graft fixedly through draw-in groove and card strip two, and the opposite side can be with the interior lateral wall of installation opening counterbalance tightly, the main spring is close to the protruding a plurality of buffer blocks that form on the outer wall of casing blind end.

Two sides of the main spring close to the bottom are bent to form bent parts, each bent part is sunken to form a strip-shaped clamping groove, two ends of the top of the vulcanization base are protruded to form a clamping strip II, and when the main spring and the vulcanization base abut against each other, the clamping strip II can be limited in the clamping groove, so that the connection stability of the main spring and the vulcanization base is ensured; in addition, the kink supports tightly fixedly with the inside wall of installing port, guarantees the stability after the vulcanization base installation, and the main spring is close to the protruding a plurality of buffer blocks that form on the outer wall of casing blind end, and the setting of buffer block has reduced the clearance between this side outer wall of main spring and the casing blind end inside wall, reduces the potential energy of main spring collision connector blind end inside wall to reduce the dynamics of main spring both sides and connector inside wall collision, and then play the shock attenuation, fall the effect of making an uproar.

In the automobile left suspension, the end part of the mounting end of the supporting arm is contracted to form a guide part, and the top of the supporting arm is protruded to form a limit block which can abut against the outer side wall of the main spring.

The installation end tip department shrink of trailing arm forms the guide part, and the guide part can guarantee that the installation end is more laborsaving when inserting the installing port, and the protruding stopper that forms in trailing arm top department, the installation end is inserting the interior certain degree of depth of installing port back, and the stopper can support with the main spring lateral wall and lean on for the trailing arm is spacing.

In the automobile left suspension, a plurality of waist-shaped holes are formed in the top of the connecting end of the supporting arm, and a plurality of reinforcing ribs are arranged at the bottom of the connecting end of the supporting arm in a hollow mode.

The top of the connecting end of the supporting arm is provided with a plurality of waist-shaped holes, the connecting end penetrates through the waist-shaped holes through fasteners and is connected with an automobile transmission, the arrangement of the waist-shaped holes can ensure that the connecting position of the connecting end and the transmission can be adjusted, the bottom of the connecting end of the supporting arm is arranged in a hollow manner, the weight of the supporting arm is reduced, and the manufacturing cost is reduced; in addition, the bottom of the bracket arm connecting end is provided with a plurality of reinforcing ribs, so that the structural strength of the bracket arm connecting end is ensured while the light weight is ensured.

Compared with the prior art, the automobile left suspension has the following advantages:

the automobile left suspension comprises a shell, a connecting assembly and a supporting arm, wherein the bottom of a connecting end of the supporting arm protrudes to form a protruding part which can be directly connected with an automobile transmission through a fastener, the number of parts is reduced, the risk of moment transmission failure is reduced, a mounting end is connected with the connecting assembly arranged in the shell, and the automobile left suspension is further damped and denoised through the connecting assembly, so that the damping and denoising performance of the automobile left suspension is improved.

And the connecting assembly comprises a main spring and a vulcanization base, the main spring is made of an elastic material, a mounting opening for inserting the mounting end of the supporting arm is formed in one side of the main spring, the mounting end can be tightly abutted to the anti-slip rib on the inner wall of the mounting opening after being inserted into the mounting opening, the stability of connection between the mounting end and the connecting assembly is ensured, and the noise reduction and vibration reduction performance of the left suspension of the automobile is improved.

And thirdly, the main spring is arranged on the side wall between the mounting hole and the outer side wall of the main spring, an annular channel is formed in the side wall, the annular channel is internally vulcanized with an integrally formed cylindrical inner core, the structure of the main spring mounting hole is reinforced through the inner core, the service life of the main spring is prolonged, a plurality of through holes are formed in the side wall of the inner core, the annular channel can be filled with liquid rubber injected when the integrally formed main spring is vulcanized through the through holes, and the connection strength of the inner core and the main spring is ensured.

Four, main spring bottom supports tightly with the vulcanization base, the diapire supports tightly in vulcanization base bottom and the connecting port, through the supplementary main spring shock attenuation of vulcanization base, make an uproar falls, vulcanize the protruding card strip that supports tightly in the connecting port both sides that forms in vulcanization base both sides, prevent to vulcanize the base and control the drunkenness in the connecting port, vulcanize its both ends arch formation card strip two of surface that base and main spring offseted and lean on, the main spring is close to the both sides of bottom and is buckled and form bending part, the inward recess of kink forms the draw-in groove, card strip two is spacing to the draw-in groove in, guarantee main spring and vulcanization base's joint strength.

Fifthly, the protruding a plurality of piece of leaning on that form in main spring top, through leaning on the tight dynamics of leaning on of piece increase main spring top and the interior roof of connector, prevent main spring vertical drunkenness in the connector, main spring is close to a plurality of buffer blocks in protruding new town on the lateral wall of connector blind end, reduce the clearance of this side surface of main spring and connector blind end, and then reduce the potential energy of collision between the two, thereby reach the shock attenuation, the effect of making an uproar falls, main spring is close to the top and with lean on protruding formation extension piece on the adjacent both sides lateral wall of piece, the extension piece reduces the clearance between main spring both sides and the connector inside wall, reduce the potential energy of main spring collision connector inside wall, thereby reduce the dynamics of main spring both sides and connector inside wall collision, and then play the shock attenuation, the effect of making an uproar falls.

The connecting end penetrates through the waist-shaped hole through a fastener and is connected with the automobile transmission, the connecting position of the connecting end and the transmission can be adjusted due to the arrangement of the waist-shaped hole, the bottom of the connecting end of the supporting arm is arranged in a hollow mode, the weight of the supporting arm is reduced, and the manufacturing cost is reduced; in addition, the bottom of the bracket arm connecting end is provided with a plurality of reinforcing ribs, so that the structural strength of the bracket arm connecting end is ensured while the light weight is ensured.

Drawings

Fig. 1 is a schematic structural diagram of the left suspension of the automobile.

Fig. 2 is an exploded view of the left suspension of the present vehicle and a partially enlarged view thereof.

Fig. 3 is a schematic structural view and a sectional view of a main spring in the left suspension of the automobile.

Fig. 4 is a first structural schematic diagram of the bracket arm in the left suspension of the automobile.

Fig. 5 is a schematic structural diagram of a bracket arm in the left suspension of the automobile.

In the figure, 1, a housing; 2. a bracket arm; 2a, a connecting end; 2a1, boss, 2a2, kidney-shaped hole; 2a3, reinforcing ribs; 2b, a mounting end; 2b1, guide part; 2c, a limiting block; 3. a connecting assembly; 3a, a main spring; 3a1, mounting port; 3a11, anti-skid ribs; 3a2, annular channel; 3a21, inner core; 3a211, a through hole; 3a3, abutment block; 3a4, extension block; 3a5, a bent part; 3a51, card slot; 3a6, buffer block; 3b, vulcanizing the base; 3b1, a first clamping strip; 3b2 and a second clamping strip; 4. and (7) connecting ports.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

As shown in fig. 1-3, the suspension of the automobile seat includes a housing 1, one end of the housing 1 is provided with a circular main positioning hole with a diameter of 10.5mm, the other end of the housing is provided with an auxiliary positioning hole with a size of 10.5 × 12.5mm, the auxiliary positioning hole is specifically a strip-shaped hole, the outer wall of the top of the housing 1, which is close to the main positioning hole, is recessed inwards to form a recess, the outer side wall of the housing 1, which is close to the auxiliary positioning hole, extends outwards to form a positioning plate, the end of the positioning plate is provided with a fixing hole with a diameter of 13mm, after the housing 1 performs position adjustment on the total amount of an automobile, the housing 1 is screwed into the auxiliary positioning hole and the longitudinal beam through bolts to be fixed, the housing 1 is screwed into the main positioning hole through bolts, the housing 1 is completely fixed on the longitudinal beam, and then the fixing hole and the wheel cover are screwed through bolts to improve the stability of the housing 1.

As shown in fig. 1-3, a connection port 4 is formed on one side of a housing 1, a closed end is formed on the other side, the lower side of the closed end is arranged in a penetrating manner, the weight of the housing 1 is reduced, and the manufacturing cost of the housing 1 is reduced, a connection assembly 3 and a supporting arm 2 made of an aluminum alloy material are installed in the connection port 4, the connection assembly 3 comprises a main spring 3a vulcanized base 3b made of a rubber material, the vulcanized base 3b is made of an aluminum alloy material, a layer of the rubber material is integrally formed by external vulcanization, the bottom of the vulcanized base 3b is tightly abutted to the inner bottom wall of the connection port 4, the top of the vulcanized base is tightly abutted to the bottom of the main spring 3a, clamping strips 3b1 are formed on the side walls on the two sides of the vulcanized base 3b in a protruding manner, the clamping strips 3b1 increase the abutting force between the side wall of the vulcanized base 3b and the inner side wall of the connection port 4, and ensure the connection stability of the vulcanized base 3b, the top of the main spring 3a protrudes to form two abutting blocks 3a3 with rectangular cross sections, and the abutting blocks 3a3 abut against the inner top wall of the shell 1, one side of the main spring 3a close to the opening of the connecting port 4 is provided with a mounting port 3a1, the mounting end 2b of the supporting arm 2 is specifically inserted into the mounting port 3a1, and the outer side wall is clamped and fixed with the inner side wall of the connecting port 4, due to the material characteristics of the main spring 3a, the vibration transmitted by the supporting arm 2 can be buffered and offset, and simultaneously, the noise generated by the vibration can be prevented, the inner wall of the mounting port 3a1 is arranged at intervals to form 21 anti-slip ribs 3a11, so that the mounting end 2b is ensured to be inserted into the mounting port 3a1 for more stable connection, the side walls of the main spring 3a close to the two ends protrude outwards to form a ladder-shaped extending block 3a4, the extending block 3a4 reduces the gap between the two sides of the main spring 3a and the inner side wall of the mounting port 3a1, and prevents the two sides of the main spring 3a from violently colliding with the inner side wall of the mounting port 3a1 when the vibration force is buffered, the response of the vehicle body under the working conditions of gear shifting impact and the like is improved, four buffer blocks 3a6 with rectangular cross sections are formed by the upper portion of the main spring 3a close to the inner bottom wall of the shell 1 in a protruding mode, the buffer blocks 3a6 also reduce the gap amount between the side wall of the main spring 3a and the inner bottom wall of the shell 1, the side wall of the main spring 3a collides with the inner bottom wall of the mounting opening 3a1 violently when the main spring buffers the shock force, and the limit impact abnormal sound is improved.

As shown in fig. 1-5, two sides of the main spring 3a are folded outwards to form folded portions, the middle portion of the bottom surface of each folded portion is recessed inwards to form a clamping groove 3a51, the upper end surface of the bent portion 3a5 abuts against the side wall of the housing 1, two ends of the upper end surface of the vulcanization base 3b are raised upwards to form a clamping strip two 3b2, the vulcanization base 3b and the main spring 3a are clamped into the clamping groove 3a51 through the clamping strip two 3b2, so that connection between the vulcanization base 3b and the housing 1 is more stable, the folded portions are clamped between the vulcanization base 3b and the inner side wall of the housing 1, and stability of the main spring 3a in the mounting opening 3a1 is further guaranteed.

As shown in fig. 1-3, an annular channel 3a2 is formed between the inner side wall of a mounting opening 3a1 of a main spring 3a and the outer side wall of the main spring 3a, a cylindrical inner core 3a21 is vulcanized and integrally formed in the annular channel 3a2, the inner core 3a21 is made of an aluminum alloy material, and has the advantages of high strength and light material weight, and the lower part of one end of the inner core 3a21, which is close to the inner bottom wall of the housing 1, is also arranged in a penetrating manner, so that the inner core 3a21 is more light and the production cost is lower, and the mounting opening 3a1 can ensure that the structural strength is higher through the arrangement of the inner core 3a21, and prevent the mounting opening 3a1 of the main spring 3a from being damaged due to excessive interference force with the inner wall of the mounting opening 3a1 of the bracket arm 2, and the damping effect from being reduced; in addition, eight through holes 3a211 communicating the inner side and the outer side of the inner core 3a21 are formed in the side wall of the inner core 3a21, when the inner core 3a21 is integrally formed in the main spring 3a through vulcanization, the through holes 3a211 can ensure that liquid rubber can sufficiently flow, and further ensure the strength of the inner core 3a21 in the integral vulcanization.

As shown in fig. 1-5, the connecting end 2a of the bracket arm 2 is of a sinking structure, the height of the connecting end 2a is 25mm, three waist-shaped holes 2a1 with the size of 14 × 16mm are formed in the top of the connecting end 2a of the bracket arm 2, a fixing hole for installing a bonding wire is formed in the top of the connecting end 2a, a protruding portion 2a1 is formed at the bottom of the fixing hole, the protruding portion 2a1 abuts against the automobile transmission, the connecting end 2a penetrates through the waist-shaped holes 2a1 through three positioning bolts to be directly connected with the automobile transmission, a transfer support does not need to be installed between the connecting end 2a and the automobile transmission, the number of parts in the torque transmission process is reduced, the manufacturing and maintenance costs of the left suspension are reduced, the dynamic stiffness of the connection between the bracket arm 2 and the transmission is improved, the failure risk of the left suspension is reduced, and the chattering generated by the transmission can be continuously buffered and unloaded in the reusing process of the left suspension, and further improve the performance of left suspension shock attenuation, making an uproar.

The tip of 2b installation ends of trailing arm 2 contracts inwards and forms guide part 2b1, can be more laborsaving insert installation end 2b into installing port 3a1 through guide part 2b1 in, improve the convenience of assembly, and the middle part arch of trailing arm 2 up end forms stopper 2c, installation end 2b is after inserting the certain degree of depth of installing port 3a1 of main spring 3a, stopper 2c can lean on with the lateral wall that main spring 3a has installing port 3a1, guarantee that installation end 2b male length can not be too deep, guarantee left suspension absorbing performance.

In addition, the one end that link 2a has the fixed orifices that bond strap used and stopper 2c is the upper end, and the one end that has bellying 2a1 is the lower extreme, and link 2a top-down thickness crescent, link 2a bottom fretwork setting to this reduction manufacturing cost, and the bottom fretwork department of trailing arm 2 sets up four strengthening ribs 2a2, strengthens the link 2a structural strength of trailing arm 2 through strengthening rib 2a2, keeps good structural strength when guaranteeing the lightweight.

The specific embodiments described herein are merely illustrative of the spirit of the utility model. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the utility model as defined in the appended claims.

Although terms such as the connecting end 2a, the protruding portion 2a1, the mounting end 2b, the guiding portion 2b1, the limiting block 2c, the connecting assembly 3, the mounting opening 3a1, the anti-slip rib 3a11, the annular channel 3a2, the inner core 3a21, the through hole 3a211, the abutting block 3a3, the extending block 3a4, the bent portion 3a5, the slot 3a51, the buffering block 3a6, the vulcanization base 3b, the first clamping strip 3b1, the second clamping strip 3b2, and the connecting opening 4 are used more herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.

Claims

1. The utility model provides a left suspension of car, includes bracket arm (2) and casing (1) that is used for being connected with the automobile body longeron, its characterized in that, install coupling assembling (3) in casing (1), bracket arm (2) one end is link (2a), and the other end is installation end (2b), link (2a) bottom arch forms bellying (2a1) that are used for being connected with automotive transmission, installation end (2b) are connected with coupling assembling (3), coupling assembling (3) can cushion the power of transmitting to bracket arm (2) installation end (2 b).

2. The left suspension of claim 1, wherein the connecting end (2a) has a gradually increasing thickness from top to bottom.

3. The left suspension of claim 1, wherein a connection port (4) is formed at one side of the housing (1), the connection assembly (3) comprises a main spring (3a) made of an elastic material, the main spring (3a) is installed in the connection port (4) in a clamping manner, an installation port (3a1) for the installation end (2b) of the bracket arm (2) to be inserted into is formed in the main spring (3a), and a plurality of anti-slip ribs (3a11) capable of abutting against the outer side wall of the installation end (2b) of the bracket arm (2) are formed on the inner wall of the installation port (3a1) in a protruding manner at intervals.

4. The left suspension of claim 3, wherein the main spring (3a) has a mounting opening (3a1), and an annular channel (3a2) is formed on the side wall of the main spring (3a1), the annular channel (3a2) is circumferentially formed outside the mounting opening (3a1), a cylindrical inner core (3a21) is integrally formed in the annular channel (3a2) in a vulcanization mode, and a plurality of through holes (3a211) are formed in the side wall of the inner core (3a 21).

5. The left suspension of claim 3 or 4, characterized in that the connecting assembly (3) further comprises a vulcanization base (3b), the top of the main spring (3a) protrudes to form a plurality of abutting blocks (3a3) which can abut against the top of the connecting port (4), the bottom abuts against the vulcanization base (3b), the two side walls of the main spring (3a) close to the top and adjacent to the abutting blocks (3a3) protrude to form extension blocks (3a4) which can abut against the inner side walls of the connecting port (4), the bottom of the vulcanization base (3b) abuts against the bottom of the connecting port (4), and the two side walls of the vulcanization base (3b) protrude to form a first clamping strip (3b1) which abuts against the inner side walls of the two sides of the connecting port (4).

6. The left suspension of claim 5, wherein two sides of the main spring (3a) near the bottom are bent to form bent portions (3a5), the bent portions (3a5) are recessed inwards to form clamping grooves (3a51), two ends of the top of the vulcanization base (3b) are protruded to form clamping strips II (3b2), one side of each bent portion (3a5) is fixedly inserted into the clamping strips II (3b2) through the clamping grooves (3a51), the other side of each bent portion can be abutted against the inner side wall of the mounting opening (3a1), and a plurality of buffer blocks (3a6) are protruded from the outer wall of the main spring (3a) near the closed end of the housing (1).

7. The left suspension of claim 4, wherein the end of the mounting end (2b) of the bracket arm (2) is contracted to form a guide part (2b1), and the top of the bracket arm (2) is protruded to form a limit block (2c) which can be abutted against the outer side wall of the main spring (3 a).

8. The left suspension of claim 7, characterized in that a plurality of waist-shaped holes (2a2) are opened on the top of the connecting end (2a) of the supporting arm (2), and a plurality of reinforcing ribs (2a3) are provided on the bottom of the connecting end (2a) of the supporting arm (2) in a hollow manner.