CN115008961A - A five-bag lightweight rear lift air suspension system - Google Patents

Abstract

The invention provides a five-airbag light-weight rear-lifting air suspension system, which relates to the technical field of automobile suspension. The other end of the arm assembly is installed with a bearing air bag, the bearing air bag is installed with an air bag fixing bracket, and the air bag fixing bracket is installed on the frame; The upper bearing, the guide arm assembly, the lower bearing of the leaf spring, and the upper bearing of the leaf spring are connected with the lifting axle through horse-riding bolts. The middle air bag bracket is installed on the frame, and a shock absorbing assembly is connected between the lower bearing of the leaf spring and the frame. The beneficial effect of the present invention is that it simplifies the structure of the rear lift air suspension system and reduces the weight of the rear lift air suspension system.

Description

A five-bag lightweight rear lift air suspension system

technical field

The invention relates to the technical field of automobile suspension, in particular to a five-bag lightweight rear-lifting air suspension system.

Background technique

In the process of automobile design, vehicle quality often has an important impact on fuel consumption, so lightweight is one of the development trends of automobile design at this stage. According to statistics, the car suspension accounts for 12% of the vehicle weight, the body accounts for 20%, and the powertrain accounts for 18%. Since the weight of the chassis has an important influence on the ride comfort and operation stability of the car, it is important to realize the lightweight of the car air suspension without increasing the cost.

In the process of truck logistics transportation, due to the large load of the vehicle when the full load is carried, double rear axles are required to carry the load, and when the vehicle returns with no load, due to the small load, the use of single rear axle drive can reduce fuel consumption. Since the rear lift air suspension can realize the flexible lifting of the lifting axle, it is favored by more and more customers.

At present, the traditional rear lift air suspension mostly adopts the nine-bag air suspension, which has the problems of many parts, single function, low integration and high cost; in addition, the quality of the five-bag rear lift air suspension on the market is relatively large. , The structure is complex, which requires large-mass components such as stabilizer bars and airbag lateral connecting plates, and it is easy to interfere with the lateral thrust bars during the jumping up and down of the suspension, resulting in problems such as tire eating and poor vehicle stability. . Therefore, it is of great significance to optimize and adjust the existing five-airbag rear-lift air suspension structure scheme to achieve light weight and solve problems such as poor vehicle stability.

SUMMARY OF THE INVENTION

The purpose of the present invention is to propose and design a five-bag lightweight rear-lift air suspension that cancels the transverse thrust rod and the airbag transverse connecting plate in view of the problems of large mass and complex structure of the existing five-bag rear lift air suspension. The system makes it possible to reduce the number of parts of the rear lift air suspension system while ensuring the rear lift function, simplify the rear lift air suspension structure, reduce the weight of the rear lift air suspension, and at the same time improve the vehicle stability.

In order to achieve the above purpose, the technical solution provided by the present invention is as follows: a five-bag lightweight rear-lifting air suspension system, which includes a guide arm assembly, one end of the guide arm assembly is hinged with a large bracket, and the large bracket is hinged on one end of the guide arm assembly. The bracket is installed on the vehicle frame; the other end of the guide arm assembly is installed with a bearing air bag, the bearing air bag is installed with an air bag fixing bracket, and the air bag fixing bracket is installed on the vehicle frame; The lower side and the upper side are respectively provided with a lower leaf spring support and an upper leaf spring support, and the guide arm assembly, the lower leaf spring support, and the upper leaf spring support are connected with the lifting bridge through horse-riding bolts. A lifting axle upper bracket is provided, the lifting axle upper bracket is connected with a lifting airbag, an intermediate airbag bracket is installed on the lifting airbag, the intermediate airbag bracket is installed on the frame, and the lower plate spring support and the frame are connected. A shock absorber assembly is connected between. In this way, the present invention can connect the guide arm assembly and the large bracket together, so that they jointly undertake the functions of bearing and guiding, so that the transverse thrust rod and the transverse connecting plate of the airbag can be omitted, and the entire rear lift air suspension can be simplified. At the same time, it avoids the problems of tire eating and poor vehicle stability caused by the lateral impact force generated by the interference of the lateral thrust rod during the up and down jumping of the rear lift air suspension system, thereby improving driving comfort and operability.

Further, the guide arm assembly adopts a non-linear two-leaf spring structure, and the structure is simple and the manufacturing and processing difficulty is small.

Further, the middle part of the guide arm assembly is used for contacting with the upper support of the leaf spring and is provided with an upper positioning protrusion, and the upper positioning protrusion is inserted into the upper support of the leaf spring; The middle part is used to contact the lower bearing of the leaf spring with a lower positioning protrusion, and the lower positioning protrusion is inserted into the lower bearing of the leaf spring; the opposite sides of the lower end of the upper bearing of the leaf spring are provided with threaded connections The threaded connection hole is threadedly connected with a horizontal positioning bolt, and the end of the horizontal positioning bolt passes through the threaded connection hole and contacts the guide arm assembly. In this way, when the guide arm assembly is installed, since the present invention can form "three-point positioning" through the horizontal positioning bolt and the upper positioning protrusion integrated on the guide arm assembly, the present invention can reduce the types of parts and simplify the leaf spring. The assembly process between the upper bearing, the guide arm assembly and the lower bearing of the leaf spring can also improve the installation accuracy of the axle.

Further, convex connecting parts are provided on opposite sides of the upper end of the upper support of the leaf spring, and the convex connecting parts are respectively in contact with both sides of the lifting bridge, thereby increasing the distance between the upper support of the leaf spring and the lifting bridge. The contact area improves the contact reliability between the lifting axle and the upper bearing of the leaf spring.

Further, the lower end of the large bracket is provided with a connecting bolt and an opening facing downward, and one end of the guide arm assembly used for hinged connection with the large bracket is provided with a rubber bushing, the rubber bushing is located in the opening, so Both ends of the rubber bushing and the open side wall of the large bracket are provided with end caps, and the connecting bolts pass through one side of the large bracket, the end cap, the rubber bushing, the end cap and the other side of the large bracket in sequence. A threaded connection nut is provided with a split pin between the nut and the connection bolt. In this way, in the actual working process, the present invention can isolate vibration and reduce noise through the rubber bushing, prevent the lateral displacement of the guide arm assembly through the end cover, so as to limit the lateral force generated when the vehicle turns; prevent the nut through the cotter pin. loose. In addition, in the present invention, a clearance fit is adopted between the large bracket and the end cap and between the rubber bushing and the connecting bolt, so as to prevent assembly difficulty.

Further, a gap is left between the guide arm assembly and the end cover, and the gap is a swing space of the guide arm assembly.

Further, the lower end of the lifting airbag is connected with the middle airbag bracket through the connecting piece, and the lower end of the lifting airbag is connected with the upper bracket of the lifting bridge. In this way, when the vehicle is fully loaded, the lifting airbag can be deflated to support the landing of the lifting axle; when the vehicle is empty, the lifting axle can be lifted by inflating the lifting airbag, thereby reducing fuel consumption.

Further, the intermediate airbag bracket is a one-piece stamping part, thereby improving the strength of the intermediate airbag bracket and facilitating the flexible lifting and lowering of the lifting bridge by the lifting airbag.

Further, it also includes a limit block assembly, the upper end of the limit block assembly is mounted on the vehicle frame, and the lower end of the limit block assembly is provided with a buffer member, and the buffer member is arranged opposite to the lifting axle. In this way, in the working process, the present invention can effectively reduce the impact of the lifting axle on the frame through the limiting block assembly, and play the role of limiting the lifting limit height of the lifting airbag and protecting the lifting airbag.

Further, the large bracket is a hollow structure in the middle, and the hollow structure on the large bracket can ensure the strength of the large bracket while carrying out a lightweight design.

As can be seen from the above technical solutions, the present invention has the following advantages:

1. The guide arm assembly in the five-bag lightweight rear lift air suspension system provided by the present invention adopts a non-linear two-leaf spring structure, and the guide arm assembly in the present invention realizes the overall modular design of the guide arm , that is, it integrates the shock absorber support and the positioning protrusion, so as to facilitate the connection of the guide arm assembly with other components, and effectively reduce the type and number of parts, simplify the installation process, and make the various parts in the rear lift air suspension system. Component layout is more reasonable;

2. The two ends of the guide arm assembly in the present invention are respectively connected with the large bracket and the bearing air bag to undertake the functions of bearing and guiding, so that the transverse thrust rod and the transverse connecting plate of the air bag can be omitted, and the entire rear lifting can be simplified. The structure of the air suspension system also avoids the problems of tire eating and poor vehicle stability caused by the lateral impact force generated by the interference of the lateral thrust rod during the up and down jumping of the rear lift air suspension system, thereby improving driving comfort and operability. ;

3. The upper bearing of the leaf spring in the present invention can form a "three-point positioning" with the lower bearing of the leaf spring through the upper positioning protrusion and the horizontal positioning bolt, so that the arrangement is convenient and the structure is simple; The contact area between the upper bearing of the leaf spring and the lower surface of the lifting axle is increased, thereby improving the contact reliability of the guide arm assembly;

4. The beam in the present invention adopts a tube beam structure, and is connected with the frame by bolts, thereby ensuring the lateral width of the frame and improving the torsional rigidity of the frame;

5. All the components and structures in the present invention can reduce the total mass of the suspension while meeting the strength requirements.

Description of drawings

In order to illustrate the technical solutions of the present invention more clearly, the accompanying drawings required in the description will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention, which are not relevant to ordinary skills in the art. As far as personnel are concerned, other drawings can also be obtained from these drawings on the premise of no creative work.

FIG. 1 is a schematic structural diagram 1 of the present invention when it is installed on an automobile chassis.

FIG. 2 is a second structural schematic diagram when the present invention is installed on an automobile chassis.

FIG. 3 is a schematic structural diagram of the connection between the lifting airbag and the lifting axle in the present invention.

FIG. 4 is a first structural schematic diagram of the connection between the guide arm assembly and the lifting axle in the present invention.

FIG. 5 is a second structural schematic diagram of the connection between the guide arm assembly and the lifting axle in the present invention.

FIG. 6 is a first structural schematic diagram of the connection between the guide arm assembly and the large bracket in the present invention.

FIG. 7 is a cross-sectional view at A-A in FIG. 6 .

FIG. 8 is a second structural schematic diagram of the connection between the guide arm assembly and the large bracket in the present invention.

In the picture: 1. Large bracket, 2. Lifting airbag, 3. Intermediate airbag bracket, 4. Guide arm assembly, 5. Upper leaf spring support, 6. Riding bolt, 7. Lower leaf spring support, 8. Reduction Shock absorber assembly, 9. Carrying air bag, 10, Air bag fixing bracket, 11, Shock absorber bracket, 12, Limit block assembly, 13, Frame, 14, Lifting axle, 15, Connecting bolt, 16, Nut, 17. Lifting axle upper bracket, 18, threaded connection hole, 19, cotter pin, 20, lifting axle support, 21, horizontal positioning bolt, 22, convex connecting part, 23, upper positioning protrusion, 24, lower positioning protrusion From, 25, beam, 26, end cap, 27, rubber bushing.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

As shown in FIGS. 1 to 8 , the present invention provides a five-airbag lightweight rear-lift air suspension system, which includes a large bracket 1 , an intermediate airbag bracket 3 , and a limiter 1 , which are sequentially installed on the frame 13 from front to rear. Block assembly 12 , shock absorber bracket 11 , airbag fixing bracket 10 .

Wherein, the large bracket 1 is a hollow structure in the middle, and the large bracket 1 is arranged on both sides of the frame 13 , the lower end of the large bracket 1 is provided with an opening with an opening downward, and the opening of the large bracket 1 is inside A guide arm assembly 4 using a non-linear two-leaf spring structure is hinged, and the rear end of the guide arm assembly 4 is connected with the air bag 9 mounted on the air bag fixing bracket 10 . In this way, the present invention can connect the guide arm assembly 4 and the large bracket 1 together, so that they jointly undertake the functions of bearing and guiding, thereby eliminating the need for the lateral thrust rod and the lateral connecting plate of the airbag, and simplifying the entire rear lift air The structure of the suspension system also avoids the problems of tire eating and poor vehicle stability caused by the lateral impact force generated by the interference of the lateral thrust rod during the up and down jumping of the rear lift air suspension system, thereby improving driving comfort and operability.

Specifically, the front end of the leaf spring of the guide arm assembly 4 is fitted with a rubber bushing 27 in an interference fit. End caps 26 are arranged between the side walls of the opening of the bracket 1; the lower end of the large bracket 1 is provided with a connecting bolt 15, and the connecting bolt 15 passes through one side of the large bracket 1, the end cap 26, and the rubber bushing in sequence. 27. The end cover 26 and the other side of the large bracket 1 are connected with the rear screw nut 16, so that the guide arm assembly 4 in the present invention can be rotated around the axis of the connecting bolt 15, and the present invention can also pass through the rubber bushing 27. In order to isolate vibration and reduce noise, the lateral displacement of the guide arm assembly 4 is prevented by the end cover 26, thereby limiting the lateral force generated when the vehicle turns. In addition, in order to facilitate assembly, clearance fit is adopted between the large bracket 1 and the end cover 26 and between the rubber bush 27 and the connecting bolt 15; in order to facilitate the swing of the guide arm assembly 4, the guide arm There is a gap between the assembly 4 and the end cover 26, and the gap is used as the swing space of the guide arm assembly 4. In order to prevent the nut 16 from loosening, a space is also provided between the nut 16 and the connecting bolt 15. Cotter pin 19.

The middle airbag bracket 3 is preferably a one-piece stamping part, and the middle airbag bracket 3 is arranged on the inner side of the vehicle frame 13 , the upper end of the middle airbag bracket 3 is provided with a lifting airbag 2 , and the upper end of the lifting airbag 2 is installed There is an upper bracket 17 of the lifting axle, and the upper bracket 17 of the lifting axle is connected with the middle part of the lifting axle 14 . In this way, when the vehicle is fully loaded, the present invention can make the lifting axle 14 fall to the ground by deflating the lifting airbag 2, and play a supporting role; when the vehicle is empty, the present invention can lift the lifting axle 14 by inflating the lifting airbag 2, and play a supporting role. to reduce fuel consumption. In addition, a lifting axle support 20 is also provided on the lifting axle 14 at a position opposite to the guide arm assembly 4 , and the lifting axle 14 passes through the lifting axle support 20 , the horse-riding bolt 6 , and the upper plate spring support 5 . . The lower bearing 7 of the leaf spring is connected with the guide arm assembly 4 as a whole.

Specifically, the upper leaf spring support 5 and the lower leaf spring support 7 are respectively disposed on the upper side and the lower side of the guide arm assembly 4, and the opposite sides of the upper end of the leaf spring upper support 5 are provided with The convex connecting parts 22 are respectively in contact with both sides of the lifting bridge 14 . Threaded connection holes 18 are provided on opposite sides of the lower end of the plate spring upper support 5. The threaded connection holes 18 are threadedly connected with horizontal positioning bolts 21, and the ends of the horizontal positioning bolts 21 are threaded through the connection. The hole 18 is then in contact with the guide arm assembly 4 , so that the present invention can adjust the relative positional relationship between the guide arm assembly 4 and the leaf spring upper support 5 in the horizontal direction through two opposite horizontal positioning bolts 21 . In addition, an upper positioning protrusion 23 is provided at the position where the middle part of the guide arm assembly 4 is used to contact the upper plate spring support 5, and the upper positioning protrusion 23 is inserted into the upper plate spring support 5; The middle part of the guide arm assembly 4 is used for contacting with the lower support 7 of the leaf spring, and a lower positioning protrusion 24 is provided, and the lower positioning protrusion 24 is inserted into the lower support 7 of the leaf spring. In this way, the present invention can form "three-point positioning" through the two horizontal positioning bolts 21 and the upper positioning protrusion 23, and realize the precise positioning of the guide arm assembly 4 through the "three-point positioning" structure. In addition, since the upper positioning protrusions 23 and the lower positioning protrusions 24 in the present invention are both integrated on the corresponding leaf springs in the guide arm assembly 4, the types and numbers of components are reduced, and the assembly process is simplified.

In addition, the lower end of the limiting block assembly is provided with a buffer member, and the buffer member is disposed opposite to the lift axle 14 , so that the impact of the lift axle 14 on the frame 13 is effectively reduced by the buffer member. The lower end of the shock absorber bracket 11 is provided with a shock absorber assembly 8, and the lower end of the shock absorber assembly 8 is connected with the lower bearing of the leaf spring, so that the guide arm assembly is paired through the shock absorber assembly 8 4 for cushioning and shock absorption.

The terms "first", "second", "third", "fourth", etc. (if any) in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to Describe a particular order or sequence. It is to be understood that the data so used may be interchanged under appropriate circumstances such that the embodiments of the invention described herein can be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having", and any variations thereof, are intended to cover non-exclusive inclusion.

The above description of the disclosed embodiments enables any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A five-airbag lightweight rear-lifting air suspension system, characterized in that it comprises a guide arm assembly, one end of the guide arm assembly is hinged with a large bracket, and the large bracket is mounted on a vehicle frame; the The other end of the guide arm assembly is installed with a load-bearing air bag, the load-bearing air bag is installed with an air bag fixing bracket, and the air bag fixing bracket is installed on the frame; the lower side and the upper side of the middle part of the guide arm assembly are respectively provided with plates The unsprung bearing and the upper leaf spring bearing, the guide arm assembly, the lower bearing of the leaf spring, and the upper bearing of the leaf spring are connected with the lifting bridge through the horse-riding bolt, and the lifting bridge is provided with the upper bearing of the lifting bridge, and the A lifting airbag is connected to the upper bracket of the lifting axle, an intermediate airbag bracket is installed on the lifting airbag, the intermediate airbag bracket is installed on the vehicle frame, and a shock absorbing assembly is connected between the lower plate spring support and the vehicle frame. 2 . The lightweight rear lift air suspension system of claim 1 , wherein the guide arm assembly adopts a non-linear two-leaf spring structure. 3 . 3. The five-airbag lightweight rear-lifting air suspension system according to claim 2, wherein the middle part of the guide arm assembly is provided with an upper positioning protrusion at the contact position with the upper bearing of the leaf spring, so The upper positioning protrusion is inserted into the upper bearing of the leaf spring; the middle part of the guide arm assembly is used for contacting the lower bearing of the leaf spring with a lower positioning protrusion, and the lower positioning protrusion is connected to the lower bearing of the leaf spring. Threaded connection holes are provided on opposite sides of the lower end of the upper support of the leaf spring, and the threaded connection holes are threadedly connected with horizontal positioning bolts, and the ends of the horizontal positioning bolts pass through the threaded connection holes and are connected with each other. Guide arm assembly contacts. 4 . The lightweight rear lift air suspension system for five airbags according to claim 3 , wherein two opposite sides of the upper end of the upper support of the leaf spring are provided with convex connecting parts, and the convex connecting parts Contact with both sides of the lifting axle, respectively. 5 . The lightweight rear lift air suspension system of claim 2 , wherein the lower end of the large bracket is provided with a connecting bolt and an opening facing downward, and the guide arm assembly is used to connect with the 5. 5 . The hinged end of the large bracket is provided with a rubber bushing, the rubber bushing is located in the opening, an end cover is provided between the two ends of the rubber bushing and the side wall of the opening of the large bracket, and the connecting bolts pass through the large bracket in turn One side, the end cover, the rubber bushing, the end cover and the other side of the large bracket are threadedly connected with a nut, and a cotter pin is arranged between the nut and the connecting bolt. 6 . The lightweight rear lift air suspension system for five airbags according to claim 5 , wherein a gap is left between the guide arm assembly and the end cover. 7 . 7. The lightweight rear lift air suspension system for five airbags according to claim 1 or 2 or 3 or 4 or 5 or 6, wherein the lower end of the lift airbag is connected to the middle airbag bracket through a connecting piece, so The lower end of the lifting airbag is connected with the upper bracket of the lifting bridge. 8 . The lightweight rear lift air suspension system for five airbags according to claim 7 , wherein the intermediate airbag bracket is a one-piece stamping part. 9 . 9 . The light-weight rear-lift air suspension system for five airbags according to claim 1 or 2 or 3 or 4 or 5 or 6, characterized in that it further comprises a limit block assembly, wherein the limit block assembly is The upper end is mounted on the vehicle frame, and the lower end of the limiting block assembly is provided with a buffer member, and the buffer member is arranged opposite to the lifting axle. 10 . The lightweight rear lift air suspension system for five airbags according to claim 1 or 2 or 3 or 4 or 5 or 6 , wherein the large bracket is a hollow structure in the middle. 11 .

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