CN218453317U

CN218453317U - Rear swing arm assembly of automobile suspension and automobile

Info

Publication number: CN218453317U
Application number: CN202222805596.5U
Authority: CN
Inventors: 张文
Original assignee: Avatr Technology Chongqing Co Ltd
Current assignee: Avatr Technology Chongqing Co Ltd
Priority date: 2022-10-24
Filing date: 2022-10-24
Publication date: 2023-02-07
Anticipated expiration: 2032-10-24

Abstract

The embodiment of the application relates to the technical field of automobile parts and discloses an automobile suspension rear swing arm assembly and an automobile. The rear swing arm assembly of the automobile suspension comprises a body and a conversion piece. The air spring positioning device comprises a body, a positioning rod and a positioning rod, wherein the body is provided with a concave platform, the middle of the concave platform is provided with a fixing hole, and the fixing hole is used for positioning the air spring; the converting element includes base and bellying, and the bellying setting is kept away from one side of body at the base, and the bellying is used for stretching into coil spring's inside to fix a position coil spring, the base is located the outer marginal part of bellying bottom surface and is planar structure, and planar structure is used for the one end butt with coil spring. The automobile suspension rear swing arm assembly provided by the embodiment of the application is simple in structure, can be simultaneously suitable for the spiral spring and the air spring, does not need to develop the automobile suspension rear swing arm suitable for the air spring or the spiral spring respectively, and reduces the die cost and the part cost.

Description

Rear swing arm assembly of automobile suspension and automobile

Technical Field

The embodiment of the application relates to the technical field of automobile parts, in particular to an automobile suspension rear swing arm assembly and an automobile.

Background

In order to improve the comfort of the motor vehicle, a vehicle suspension is generally provided between the vehicle body and the vehicle wheels, which enables forces and torques to be transmitted between the vehicle body and the vehicle wheels. Meanwhile, the automobile suspension can buffer the impact force on the automobile body when the automobile runs on an uneven road surface, so that the vibration of the automobile body caused by the impact force can be reduced.

A common automotive suspension includes an elastic member, a guide structure, a connecting member, and the like. The elastic member can alleviate and suppress the impact of the uneven road surface on the automobile body. Common resilient members include leaf springs, coil springs, and air springs, among others. Compared with a steel plate spring, the spiral spring and the air spring occupy small volume, so the spiral spring and the air spring are selected for the existing automobile.

In view of the different requirements of different users, the air spring or the coil spring may be mounted on differently configured vehicles of the same vehicle type. In the related art, a suitable automobile suspension rear swing arm needs to be specially developed for an air spring or a spiral spring, so that the development cost is high, and the development period is long.

Therefore, a need exists for an automotive suspension rear swing arm assembly that can simultaneously satisfy the installation requirements of an air spring and a coil spring.

SUMMERY OF THE UTILITY MODEL

In view of this, this application embodiment provides a rear swing arm assembly of automobile suspension and car, has following advantage: the automobile suspension rear swing arm has the advantages that the structure is simple, the automobile suspension rear swing arm can be simultaneously suitable for the spiral spring and the air spring, the automobile suspension rear swing arm suitable for the air spring or the spiral spring does not need to be developed, the cost of a die and the cost of parts are reduced, and the development period is shortened.

In order to achieve the above purpose, the technical solution of the embodiment of the present application is implemented as follows:

in a first aspect, an embodiment of the present application provides an automotive suspension rear swing arm assembly, including: the air spring positioning device comprises a body, wherein a concave platform is arranged on the body, a fixing hole is formed in the middle of the concave platform, and the fixing hole is used for positioning the air spring; the conversion part comprises a base and a protruding part, wherein the protruding part is arranged on one side, far away from the body, of the base, the protruding part is used for extending into the spiral spring to position the spiral spring, the outer edge part, located on the bottom surface of the protruding part, of the base is of a plane structure, and the plane structure is used for being abutted to one end of the spiral spring.

The swing arm assembly behind the automotive suspension that this application embodiment provided can make this automotive suspension rear swing arm assembly be applicable to coil spring or air spring through the converting part that sets up on the body. Specifically, when the rear swing arm assembly of the automobile suspension provided by the embodiment of the application is used for mounting the spiral spring, the conversion part is firstly mounted on the concave platform, the protruding part on the conversion part extends into the spiral spring, the purpose of positioning the spiral spring can be achieved, meanwhile, the protruding part has a certain height, the spiral spring can be limited in the motion process of the suspension, the spiral spring is prevented from being popped out, and therefore the rear swing arm assembly of the automobile suspension provided by the embodiment of the application is suitable for the spiral spring; when the automobile suspension rear swing arm assembly provided by the embodiment of the application is used for installing the air spring, the conversion part is detached from the concave table, at the moment, the fixing hole formed in the middle of the concave table can be used for positioning the air spring, and particularly, the installation boss at the bottom of the air spring extends into the fixing hole to complete the positioning of the air spring. Therefore, by installing the conversion part on the concave table or detaching the conversion part from the concave table, the rear swing arm assembly of the automobile suspension provided by the embodiment of the application can be suitable for the spiral spring or the air spring, a special rear swing arm of the automobile suspension does not need to be developed for the spiral spring and the air spring, the cost of a die and the cost of parts are reduced, and meanwhile, the development period can be shortened. And the outer edge part of the base positioned on the bottom surface of the bulge is set to be a plane structure, so that the conversion piece is simple in structure and convenient to manufacture.

In a possible implementation manner of the present application, the outer edge portion of the base located on the bottom surface of the protruding portion is provided with a first connecting hole, a second connecting hole is provided at a position corresponding to the first connecting hole on the recessed table, and the fastener detachably connects the conversion piece to the recessed table through the first connecting hole and the second connecting hole.

In a possible implementation manner of the application, the concave station is arranged at the edge of the body, the part of the edge of the body, which is positioned outside the concave station, is provided with a notch, the part of the body, which is positioned inside the concave station, forms an arc-shaped side wall for the concave station, and the size of one side of the concave station, which is arranged on the body, is larger than the size of the other side of the body.

In a possible implementation of the present application, the fixing hole is a circular hole, a side wall of the circular hole is provided with a positioning groove, and the positioning groove extends along the axial direction of the fixing hole along the surface of the concave table.

In one possible implementation of the present application, the recessed table is circular, and an annular groove is provided between a circumferential edge of the recessed table and the body.

In a possible implementation manner of the present application, the protruding portion is a truncated cone, and the truncated cone is disposed at a middle position of the base, and a size of the truncated cone gradually decreases toward a direction away from the concave.

In one possible implementation of the present application, the concave platform is circular, the base is circular, and the axes of the truncated cone, the base, and the concave platform coincide.

In a possible implementation manner of the application, a plurality of first connecting holes are formed in the base, a plurality of second connecting holes are formed in positions, corresponding to the first connecting holes, on the concave station, the first connecting holes correspond to the second connecting holes one to one, the converting piece is connected to the concave station through the first connecting holes and the second connecting holes by the fastening piece, and the first connecting holes are symmetrically distributed about the axis center of the base.

In a possible implementation manner of the present application, the first connection hole is a counter-sunk hole, and after the fastener is installed to the counter-sunk hole, the fastener does not exceed the surface of the side of the base where the protrusion is arranged.

In a second aspect, an embodiment of the present application further provides an automobile, including: the automobile suspension comprises an automobile body, automobile wheels and an automobile suspension, wherein the automobile wheels are connected to the automobile body through the automobile suspension. The automobile suspension comprises the automobile suspension rear swing arm assembly provided by any one of the first aspect.

Because the car that this application embodiment provided includes the rear swing arm assembly of car suspension that the first aspect provided, consequently have the same technological effect, promptly: install the converting part to the concave station through foretell on or pull down from the concave station, can make the rear swing arm assembly of automotive suspension that this application embodiment provided be applicable to coil spring or air spring, need not to develop special rear swing arm of automotive suspension to coil spring and air spring again, make mould cost and part cost reduce, can shorten development cycle simultaneously.

Drawings

FIG. 1 is an exemplary view of a coil spring;

FIG. 2 is an exemplary illustration of an air spring;

FIG. 3 is a schematic overall structural diagram of a rear swing arm assembly of an automotive suspension according to an embodiment of the present disclosure;

FIG. 4 is a schematic structural diagram of a body of a rear swing arm assembly of an automotive suspension according to an embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of a converter of a rear swing arm assembly of an automotive suspension according to an embodiment of the present application.

Reference numerals:

1-a coil spring; 11-a mounting mat; 2-an air spring; 21-mounting a boss; 211-orientation key; 3-a rear swing arm assembly of the automobile suspension; 31-a body; 311-concave stage; 3111-a fixation hole; 3112-second connection hole; 3113-positioning grooves; 312-an annular groove; 32-a transition piece; 321-a first connection hole; 322-a boss; 323-a base; 324-a fastener; 33-connecting structure.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following detailed descriptions of specific technical solutions of the present application are made with reference to the accompanying drawings in the embodiments of the present application. The following examples are intended to illustrate the present application, but are not intended to limit the scope of the present application.

In the embodiments of the present application, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present application, "a plurality" means two or more unless otherwise specified.

In addition, in the embodiments of the present application, directional terms such as "upper", "lower", "left", and "right" are defined with respect to the schematically-placed orientation of components in the drawings, and it is to be understood that these directional terms are relative concepts, which are used for descriptive and clarifying purposes, and may be changed accordingly according to changes in the orientation in which the components are placed in the drawings.

In the embodiments of the present application, unless otherwise explicitly specified or limited, the term "connected" is to be understood broadly, for example, "connected" may be fixedly connected, detachably connected, or integrally formed; may be directly connected or indirectly connected through an intermediate.

In the embodiments of the present application, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.

In the embodiments of the present application, words such as "exemplary" or "for example" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "such as" is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.

The embodiment of the application provides an automobile, which generally comprises an automobile body, and for a fuel automobile or a hybrid automobile, the automobile body is provided with power devices such as an engine, a gearbox and the like; for pure electric vehicles, the vehicle bodies of the vehicles are all provided with power devices such as power batteries, motors and the like; for automobiles using other energy sources as power, a corresponding power device is arranged on an automobile body. These automotive power plants are connected to the wheels of the vehicle through the vehicle body and the vehicle suspension for driving the wheels of the vehicle in rotation, thereby moving the vehicle. In addition, the automobile suspension can buffer the impact on the automobile body when the automobile runs on an uneven road surface, so that the vibration of the automobile body caused by the impact can be reduced. In the embodiment of the present application, the vehicle type of the automobile is not limited. For example, the vehicle in the embodiment of the present application may be a sedan type, an off-road type, a Multi-Purpose vehicle (MPV) type, or other vehicle types.

The elastic member selected for the automotive suspension is generally a spiral spring 1 or an air spring 2, and referring to fig. 1, the elastic member is an example of a commonly used spiral spring 1; referring to fig. 2, an example of a conventional air spring 2 is shown.

To this, the embodiment of the present application provides an automobile suspension rear swing arm assembly 3, can adapt coil spring 1 or air spring 2, need not to carry out the automobile suspension rear swing arm of independent development adaptation to air spring 2 or coil spring 1 again.

Referring to fig. 3, an exemplary diagram of an automotive suspension rear swing arm assembly 3 provided in the embodiment of the present application is provided, specifically, the automotive suspension rear swing arm assembly 3 provided in the embodiment of the present application includes: a body 31 and a transition piece 32. Wherein, the body 31 is provided with a concave table 311, the middle of the concave table 311 is provided with a fixing hole 3111, and the fixing hole 3111 is used for positioning the air spring 2; the conversion member 32 includes: a base 323 and a protrusion 322, specifically, the base 323 is detachably connected to the body 31, the protrusion 322 is disposed on a side of the base 323 away from the body 31, and the protrusion 322 can extend into the interior of the coil spring 1 to position the coil spring 1. Meanwhile, an outer edge portion of the base 323 located at the bottom surface of the boss 322 is a flat structure for abutting against one end of the coil spring 1.

It should be noted that, when the converter 32 is manufactured, the base 323 and the protrusion 322 may be manufactured separately, and then the protrusion 322 is fixedly connected to the base 323, for example, the protrusion 322 may be welded to the base 323. In addition, it should be noted that the end of the general coil spring 1 is processed by a grinding head, so that the verticality of the coil spring 1 can be ensured, and the end face of the coil spring 1 can be in plane contact with other contacts; alternatively, the end of some coil springs 1 is further provided with a mounting pad 11, one end of the mounting pad 11 corresponding to the end of the coil spring 1 forms a spiral surface, and one end of the mounting pad 11 corresponding to the conversion element 32 forms a plane surface. Thus, the contact of the coil spring 1 with the base 323 is converted into a planar contact by the mounting pad 11. In view of this, in the embodiment of the present application, the outer edge portion of the base 323 on the bottom surface of the protrusion 322 is configured to be a plane structure, which enables the structure of the base 323 to be simple and facilitates the manufacturing of the base 323.

The rear swing arm assembly 3 of the present embodiment has a first configuration when the conversion member 32 is attached to the recessed portion 311, and a second configuration when the conversion member 32 is detached from the recessed portion 311. Specifically, when the rear swing arm assembly 3 of the automotive suspension provided by the embodiment of the present application is used for mounting the coil spring 1, the converter 32 is first mounted on the concave 311, and the protrusion 322 on the converter 32 can position the coil spring 1; when the rear swing arm assembly 3 of the automobile suspension provided by the embodiment of the application is used for installing the air spring 2, the conversion part 32 is detached from the concave table 311, and the fixing hole 3111 arranged in the middle of the concave table 311 can be used for positioning the installation boss 21 of the air spring 2, so that the air spring 2 can be positioned. Like this, swing arm assembly 3 behind the automotive suspension that this application embodiment provided is through simply installing or dismantling down conversion 32 from the body 31 of swing arm assembly 3 behind the automotive suspension, can make the automotive suspension behind swing arm assembly 3 that this application provided satisfy the installation requirement of coil spring 1 and air spring 2, need not to develop special automotive suspension back swing arm to coil spring 1 and air spring 2 again, makes mould cost and part cost reduce, can shorten development cycle simultaneously.

In some embodiments of the present application, the base 323 is removably coupled to the body 31 by the provision of fasteners 324. Specifically, a first coupling hole 321 is provided at an outer edge portion of the base 323 of the conversion member 32 on the bottom surface of the protrusion 322, a second coupling hole 3112 is provided at a position corresponding to the first coupling hole 321 on the recess 311, a fastening member 324 couples the conversion member 32 to the recess 311 through the first coupling hole 321 and the second coupling hole 3112, and the conversion member 32 can be also detached from the recess 311 by detaching the fastening member 324.

It should be noted that the concave portion 311 provided on the body 31 refers to a concave structure provided on the surface of the body 31, similar to a concave structure provided on the surface of the body 31. In addition, the embodiment of the present application does not limit the position where the concave stage 311 is disposed on the housing, and the concave stage 311 may be disposed at an intermediate position of the body 31; as shown in fig. 3, the concave portion 311 may be provided at an edge of one side of the body 31. In the present embodiment, the manufacturing method of the body 31 is not limited, and the body 31 may be formed in a one-piece plate-like structure and machined into the required shape of the body 31 by lathe cutting or the like, so that the concave table 311 and the fixing hole 3111 in the middle of the concave table 311 may be machined by lathe cutting. However, the above-described system does not satisfy the development demand for weight reduction of automobiles. With the development of material technology, the body 31 of the rear swing arm assembly 3 of the present application may be manufactured by casting or pressing, and thus, the recessed table 311 provided in the body 31 and the fixing hole 3111 provided between the recessed tables 311 may be manufactured by casting or pressing together. This application embodiment also does not prescribe a limit to the material of body 31 of automobile suspension rear swing arm assembly 3, for example, can adopt the aluminum alloy to make this body 31, the aluminum alloy material has density little, light in weight's characteristics, can satisfy the light-weighted requirement of car, higher intensity has again simultaneously, can make the automobile suspension rear swing arm assembly 3 that this application embodiment provided have higher intensity, can bear the impact of car travel on uneven road surface, make the automobile suspension rear swing arm assembly 3 that this application embodiment provided play a role stably, it is not fragile. Of course, the main body 31 of the rear swing arm assembly 3 of the present application may be made of other materials, such as steel.

Except for making the concave table 311 and the body 31 into an integrated structure, the installation position of the concave table 311 can be reserved on the body 31, the concave table 311 is made separately, then the concave table 311 is fixedly connected to the body 31, for example, the concave table 311 can be welded to the body 31, so that the concave table 311 and the body 31 can be made flexibly, different materials can be selected according to the use characteristics of the body 31 and the concave table 311, and the flexibility of the rear swing arm assembly 3 of the automobile suspension provided by the embodiment of the application is improved.

It should be noted that, in the embodiment of the present application, the shape of the body 31 is also not limited, for example, referring to fig. 3, the shape of the body 31 may be set to be an i-shaped structure as shown in the drawing, the connecting structures 33 may be provided on the extending walls of the four corners of the i-shaped structure, and the rear swing arm assembly 3 of the automobile suspension provided in the embodiment of the present application is connected to other structures of the automobile, such as: to the axle or sub-frame.

In addition, the fastening member 324 for connecting the conversion member 32 to the recessed table 311 may be a fastening member 324 such as a bolt, a screw, or a rivet, as long as the conversion member 32 can be easily attached to the recessed table 311 and also detached from the recessed table 311. For example, the conversion member 32 may be mounted to the recess 311 in the most common manner of a hexagon head bolt and a nut, and particularly, a nut may be provided on a side of the body 31 away from the recess 311, such that the conversion member 32 can be mounted to the recess 311 by tightening the nut by connecting the hexagon head bolt to the nut through the first connection hole 321 and the second connection hole 3112; in addition, an internal thread can be further formed on the inner wall of the second connection hole 3112, and the conversion part 32 is mounted on the concave table 311 by fitting the external thread of the hexagon head bolt with the internal thread of the inner wall of the second connection hole 3112, so that the nut is omitted, and the fastening part 324 is also conveniently mounted.

In the space near the rear swing arm of the automotive suspension, parts related to the automotive suspension, such as a positioning arm, a steering rod, a stabilizer bar, and the like, are generally further provided, so in some embodiments of the present application, referring to fig. 3, the concave platform 311 is provided at an edge position of one side of the body 31, and the connection structure 33 of the rear swing arm assembly 3 of the automotive suspension in the present application is provided on the extension walls of four corners of the body 31, so that an avoiding space can be formed for other parts, so as to meet the arrangement requirements of each part near the rear swing arm of the automotive suspension. With the recessed ledge 311 disposed in a central location of the body 31, the body 31 will form a complete, closed sidewall structure about the recessed ledge 311 relative to the recessed ledge 311. In the embodiment of the present application, the concave platform 311 is disposed at an edge position of one side of the body 31, and a portion of the edge of the body 31 located outside the concave platform 311 is provided with a notch, so that the sidewall formed by the body 31 to the concave platform 311 is no longer in a closed shape, and the portion of the body 31 located inside the concave platform 311 forms an arc-shaped sidewall to the concave platform 311. Thus, the coil spring 1 or the air spring 2 can be attached by using the notch, and the amount of compression of the coil spring 1 or the air spring 2 can be reduced when the coil spring 1 or the air spring 2 is attached, which is more advantageous for attaching the coil spring 1 or the air spring 2.

Meanwhile, in order to secure the strength of the body 31 on the side where the recess 311 is provided, referring to fig. 3, the size of the body 31 on the side where the recess 311 is provided is made larger than the size of the body 31 on the side away from the recess 311. Because the concave 311 arranged on the body 31 is used for installing the air spring 2 or the conversion part 32 is used for installing the coil spring 1, the impact of the air spring 2 or the coil spring 1 is mainly borne by the body 31 at the position near the concave 311, and the size of one side of the body 31, which is provided with the concave 311, is larger than the size of the other side of the body 31, so that the stress strength of the body 31 near the concave 311 can meet the requirement, and the body 31 of the rear swing arm assembly 3 of the automobile suspension in the application is not easy to damage.

In addition, in some embodiments of the present application, referring to fig. 4, the fixing hole 3111 is configured as a circular hole, and meanwhile, in order to position the air spring 2 along the circumferential direction of the air spring 2 and prevent the air spring 2 from rotating, the positioning groove 3113 is provided on the side wall of the fixing hole 3111, so that the positioning key 211 or the positioning protrusion is correspondingly provided on the mounting boss 21 of the air spring 2, and the positioning key 211 or the positioning protrusion is matched with the positioning groove 3113, so that the air spring 2 can be limited and the air spring 2 is prevented from rotating along the circumferential direction. Specifically, the positioning groove 3113 may be a groove having a rectangular cross section and extending in the axial direction of the fixing hole 3111, and a flat key may be installed on the intermediate shaft of the air spring 2 corresponding to the rectangular groove, so that the air spring 2 may be limited. Note that, in order to allow the positioning key 211 or the positioning protrusion on the air spring 2 to be inserted into the positioning groove 3113 in the axial direction thereof, the positioning groove 3113 is initially provided along the surface of the recess table 311 and extends toward the inside of the fixing hole 3111 in the axial direction of the fixing hole 3111. In addition, it should be noted that the positioning groove 3113 may be manufactured after the body 31 is manufactured, for example, the positioning groove 3113 may be obtained by cutting the position of the positioning groove 3113 on the concave table 311 by machine tool equipment; in addition, when the body 31 is manufactured, the positioning groove 3113 can be manufactured together, and a special structure corresponding to the positioning groove 3113 can be arranged on a die for casting or stamping the body 31, so that the positioning groove 3113 can be manufactured together through the same process for manufacturing the body 31, and the time for manufacturing the positioning groove 3113 is saved.

Referring to fig. 4, in some embodiments of the present application, the concave platform 311 is configured to be circular, so that the shape of the concave platform 311 can be smoothly transited compared to other shapes, thereby avoiding a stress concentration point, and preventing the concave platform 311 from cracking when being impacted by the coil spring 1 and the air spring 2. Meanwhile, the circular shape of the recessed land 311 facilitates the manufacture of the recessed land 311, and for example, when the recessed land 311 is machined by a lathe machine, the circular shape of the recessed land 311 facilitates the machining of the recessed land 311 by cutting or the like. Further, since both the coil spring 1 and the air spring 2 have circular cross sections, the utilization rate of the recess 311 can be sufficiently utilized by providing the recess 311 in a circular shape. Further, referring to fig. 4, in the present embodiment, an annular groove 312 is further provided between the circumferential edge of the recessed land 311 and the body 31. Thus, when the concave platform 311 is machined by adopting a machine tool cutting mode, the annular groove 312 can form a tool withdrawal groove, so that the concave platform 311 is conveniently machined; when the body 31 and the concave 311 are integrally cast, the annular groove 312 can reinforce the concave 311, so that the stress strength of the concave 311 is improved. Meanwhile, the annular groove 312 can be matched with the bottom end of the outer edge of the air spring 2, so that the air spring 2 can be installed conveniently.

In some embodiments of the present application, there are various options for the arrangement of the protruding portion 322, for example, the protruding portion 322 may be arranged as a cylindrical table, which is a cylindrical protrusion arranged along the surface of the base 323 toward the installation position of the coil spring 1; the projection 322 may be a square table as long as the square table can be made to correspond to the inner wall of the coil spring.

In addition, referring to fig. 5, in some embodiments of the present disclosure, the protrusion 322 of the conversion member 32 is set to be a truncated cone, and the truncated cone is set to be at an intermediate position of the base 323. Meanwhile, the size of the truncated cone on the side away from the concave 311 is gradually reduced, that is, the size of the truncated cone corresponding to one end of the coil spring 1 is gradually reduced. When the coil spring 1 is attached, the coil spring 1 can slide along the inclined surface of the truncated cone, and the inclined surface of the truncated cone serves to guide the coil spring 1. Therefore, the installation process of the spiral spring 1 can be simplified, and the spiral spring 1 and the cone frustum can be automatically centered under the guiding action of the inclined plane of the cone frustum without adjusting the position of the spiral spring 1.

It should be noted that, referring to fig. 3 and 5, in some embodiments of the present application, the protrusion 322 may also be made as a hollow structure. Since the pressing force of the coil spring 1 applied to the switching member 32 is mainly a force in the axial direction of the coil spring 1, the force is mainly received by the base 323 of the switching member 32, and the projection 322 is not substantially subjected to the axial pressing force from the coil spring 1, and at the same time, the lateral force applied to the projection 322 by the coil spring 1 is small during the suspension movement. Therefore, the force applied to the protrusion 322 is small, and the requirement of the protrusion 322 for the strength of the material is low, so that the protrusion 322 can be made into a hollow structure. Thus, the material can be saved, the weight of the converter 32 can be reduced, and the rear swing arm assembly 3 of the automobile suspension provided by the embodiment of the application can further meet the requirement of light weight of the automobile.

In addition, the present embodiment also does not limit the manufacturing method of the truncated cone, and the converter 32 provided in the present embodiment may be obtained by obtaining the truncated cone by casting or by processing a cylindrical material, and then welding the truncated cone to the base 323. The hollow truncated cone may be manufactured by casting, necking, press forming, or the like.

On this basis, in some embodiments of the present application, with reference to fig. 3, the recessed platform 311 is circular, the base 323 is circular, and the axes of the truncated cone, the base 323, and the recessed platform 311 coincide. In this way, the automotive suspension rear swing arm assembly 3 provided by the embodiment of the present application can bear a large force along the axial direction of the concave table 311. Meanwhile, when the base 323 and the protruding portion 322 are manufactured as an integral structure, the manufacturing is also convenient.

In addition, referring to fig. 3, 4 and 5, in some embodiments of the present application, in order to make the connection of the converting member 32 and the socket 311 stable, a plurality of first connection holes 321 are provided on the base 323, a plurality of second connection holes 3112 are provided on the socket 311 at positions corresponding to the first connection holes 321, and the first connection holes 321 and the second connection holes 3112 are provided in a one-to-one correspondence. The fastener 324 couples the conversion member 32 to the recess 311 through the first coupling hole 321 and the second coupling hole 3112. Meanwhile, in order to facilitate the fabrication of the first and second connection holes 321 and 3112 and to make the fastening force between the conversion member 32 and the pocket 311 uniform, in the present application, the arrangement of the first and second connection holes 321 and 3112 is distributed symmetrically about the axis center of the base 323. As an example, referring to fig. 3, in fig. 3, the number of the first connection holes 321 and the second connection holes 3112 is three, and other numbers of the first connection holes 321 and the second connection holes 3112 may be set with reference to fig. 3.

In addition, in order that the installed fastener 324 does not interfere with the coil spring 1, in some embodiments of the present application, the first connection hole 321 is provided as a counter-sunk hole. Thus, after the fastening member 324 is mounted to the first connecting hole 321, the fastening member 324 can be prevented from protruding beyond the surface of the base 323 on the side where the boss 322 is provided, that is, the upper end of the fastening member 324 can be prevented from protruding beyond the surface of the conversion member 32 corresponding to the position of the coil spring 1, so that the mounting of the coil spring 1 can be facilitated, and the fastening member 324 can be prevented from interfering with the coil spring 1. Moreover, due to the protection effect of the countersunk holes on the fastening pieces 324, the fastening pieces 324 and the spiral spring 1 can be isolated from each other in the driving process of the automobile, the friction between the spiral spring 1 and the fastening pieces 324 is avoided, and the service lives of the fastening pieces 324 and the spiral spring 1 are prolonged.

Based on this, to facilitate installation of the fastener 324 in the counterbore, in some embodiments of the present application, the fastener 324 is selected to be a socket head cap screw. The socket head cap screw is well suited to be installed in the countersunk hole, and the socket head cap screw has high coupling strength, enabling the conversion member 32 to be stably coupled to the recess 311. Meanwhile, in order to further firmly connect the converting element 32 to the recessed portion 311, a high-strength hexagon socket head cap screw may be used.

The above-mentioned serial numbers of the embodiments of the present application are merely for description and do not represent the merits of the embodiments. The above description is only a preferred embodiment of the present application, and not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application, or which are directly or indirectly applied to other related technical fields, are included in the scope of the present application.

Claims

1. An automotive suspension rear swing arm assembly, comprising:

the air spring positioning device comprises a body, wherein a concave platform is arranged on the body, a fixing hole is formed in the middle of the concave platform, and the fixing hole is used for positioning the air spring;

the conversion part comprises a base and a protruding part, wherein the protruding part is arranged on one side of the body, the base is far away from the protruding part, the protruding part is used for stretching into the inside of the spiral spring to be positioned, the base is located the outer edge part of the bottom surface of the protruding part is of a plane structure, and the plane structure is used for being abutted to one end of the spiral spring.

2. The rear swing arm assembly according to claim 1, wherein a peripheral portion of the base on the bottom surface of the boss is provided with a first connecting hole, a second connecting hole is provided in the pocket at a position corresponding to the first connecting hole, and a fastener detachably connects the adapter to the pocket through the first connecting hole and the second connecting hole.

3. The rear swing arm assembly of automobile suspension as claimed in claim 1, wherein the concave platform is provided at the edge of the body, the edge of the body located outside the concave platform is provided with a notch, the part of the body located inside the concave platform forms an arc-shaped side wall for the concave platform, and the size of one side of the concave platform provided on the body is larger than that of the other side of the body.

4. The rear suspension swing arm assembly according to claim 1, wherein the fixing hole is a circular hole, and a side wall of the circular hole is provided with a positioning groove extending in an axial direction of the fixing hole along a surface of the recessed table.

5. The vehicle suspension trailing swing arm assembly of claim 1 wherein the pocket is circular and an annular groove is provided between a circumferential edge of the pocket and the body.

6. The rear suspension swing arm assembly as claimed in claim 1, wherein the boss is a truncated cone disposed at an intermediate position of the base, and the size of the truncated cone decreases in a direction away from the concave portion.

7. The vehicle suspension trailing swing arm assembly of claim 6 wherein the platform is circular, the base is circular, and the axes of the cone, the base and the platform coincide.

8. The rear swing arm assembly according to claim 2, wherein a plurality of first connection holes are provided in the base, a plurality of second connection holes are provided in the pocket at positions corresponding to the first connection holes, the first connection holes and the second connection holes correspond one to one, the fastening member connects the conversion member to the pocket through the first connection holes and the second connection holes, and the plurality of first connection holes are symmetrically distributed about an axial center of the base.

9. The rear swing arm assembly according to claim 8, wherein the first connection hole is a countersunk hole, and the fastener is not protruded beyond a surface of the base on a side where the boss is provided after the fastener is mounted to the countersunk hole.

10. An automobile, comprising:

an automotive body;

a vehicle wheel;

automotive suspension comprising an automotive suspension trailing arm assembly according to any one of claims 1 to 9, the automotive wheel being connected to the automotive body by the automotive suspension.