Integral casting axle housing integrated with air spring corbel and suspension assembly

Abstract

The utility model provides an integrally-cast axle housing integrated with an air spring supporting arm and a suspension assembly, and relates to the technical field of vehicle driving axle housings, and an integrally-cast axle housing body comprises an integrally-cast axle housing main body and the air spring supporting arm; the integrally-cast axle housing body and the air spring supporting arm stretching across the upper wing face of the integrally-cast axle housing body are integrally integrated. The thickness of the air spring supporting arm is in uniform transition, stress distribution of the integrally-cast axle housing body is more uniform, the overall rigidity and strength of the device are better than those of a traditional structure which is arranged on the lower wing face of the axle housing body and connected with the front wing face and the rear wing face of the axle housing body, and the problem that the shape of the air spring supporting arm is seriously limited by space is solved. According to the air spring supporting arm, the appearance structure of the air spring supporting arm is simplified, the air spring supporting arm is lighter, the purpose of saving oil is achieved, the integral casting design structure can avoid influences caused by looseness of a connecting piece or defects of a welding structure, and the integral structure is more stable and safer.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle drive axle housings, in particular to an integral cast axle housing and a suspension assembly with an integrated gas spring support arm. Background Art

[0002] With the development of axle housing technology for new energy commercial vehicles, integrated electric drive axle housing technology has been widely used. The integrated electric drive axle is the power system and transmission system of new energy commercial vehicles, which has the functions of providing power for the whole vehicle, bearing loads, and reducing speed. The existing integrated electric drive axle housing mainly uses air springs as elastic elements to elastically connect the axle housing with the frame to alleviate the impact load on the frame caused by uneven road surface during vehicle driving, reduce the vibration caused by this, improve driving comfort and reduce the vibration impact of cargo.

[0003] The elastic connection between the traditional air spring and the bridge housing is usually achieved by assembling brackets on both sides of the lower wing surface of the bridge housing. The mounting surfaces on both sides of the brackets are connected to the air springs, and the middle position of the brackets is bolted to the leaf spring seat at the specified position of the bridge housing body. The leaf spring seat is welded and fixed to the body at a specified position angle.

[0004] However, this connection method is complicated, the shape of the bracket is severely restricted by space, and the appearance structure is complex, which greatly increases the weight cost of the entire bridge shell unit. In addition, the assembly of the bracket to the lower wing surface of the body is not conducive to improving the overall strength and rigidity of the bridge shell, and is prone to stress concentration. Utility Model Content

[0005] The purpose of the utility model is to provide an integral cast bridge housing and suspension assembly with an integrated gas spring support arm. The device solves the problem that the middle position of the support arm is bolted to the leaf spring seat at the specified position of the bridge housing body, and the leaf spring seat is welded and fixed to the lower wing surface of the body at a specified position angle. The connection method is complicated, the shape of the support arm is severely restricted by space, the appearance structure is complex, and the weight cost of the entire bridge housing unit is greatly increased. In addition, the assembly of the support arm to the lower wing surface of the body is not conducive to improving the overall strength and rigidity of the bridge housing, and is prone to stress concentration.

[0006] The utility model provides an integral casting bridge housing with integrated gas spring support arm, comprising:

[0007] One-piece cast bridge housing body;

[0008] The integrally cast bridge housing body comprises:

[0009] One-piece cast bridge housing body;

[0010] There are two gas spring support arms, which are respectively spanned and integrally formed on the top surface of the integrally cast bridge housing body and the left and right sides of the front and rear side walls;

[0011] The cross-sectional width track of the gas spring support arm gradually decreases from the front and rear side walls of the integrally cast bridge housing body to both sides through a large fillet transition and extends to the end in a trapezoidal shape;

[0012] Both ends of the gas spring support arm are fixedly connected with a cylindrical air bag mounting plate.

[0013] As a further optimization solution, in order to simplify the overall casting process, facilitate production, and ensure sufficient strength, the one-piece cast bridge housing body is made of high-strength ductile iron material.

[0014] As a further optimization scheme, in order to further improve the connection strength between the gas spring support arm and the one-piece cast bridge housing body, the upper surface of the one-piece cast bridge housing body is the upper wing surface of the body, the lower surface of the one-piece cast bridge housing body is the lower wing surface of the body, the front wall of the one-piece cast bridge housing body is the front wing surface of the body, and the rear wall of the one-piece cast bridge housing body is the rear wing surface of the body;

[0015] The middle part of the gas spring support arm is in a bow shape, the middle section of the bow shape is a straight line section, and both ends of the straight line section are integrally formed with arc sections;

[0016] The straight portion spans across and is integrally formed on the upper wing surface of the main body, and the two arc segments are integrally connected with the front wing surface of the main body and the rear wing surface of the main body respectively;

[0017] Two ends of the bow-shaped middle portion of the gas spring support arm extend outwards to form a front gas spring support arm and a rear gas spring support arm respectively.

[0018] As a further optimization scheme, in order to facilitate the connection of the one-piece cast bridge shell body with other devices, an upward push bracket is integrally formed in the middle of the upper wing surface of the body, and downward push brackets are integrally formed on the left and right sides of the lower wing surface of the body respectively, a reinforcement ring is integrally formed in the middle of the front wing surface of the body, and a rear cover is integrally formed on the rear wing surface of the body, and brake flanges are integrally formed at both ends of the one-piece cast bridge shell body, and a half-axle sleeve is fixedly connected to the brake flange;

[0019] The gas spring support arm is located on one side of the brake flange on the same side close to the middle of the integrally cast bridge housing body.

[0020] As a further optimization scheme, in order to provide an embodiment, the cross-section of the gas spring support arm is in the shape of a "door", and the gas spring support arm is composed of a first upper cover, a first left facade, and a first right facade. The first left facade and the first right facade are vertically integrated on the same side edge of the first upper cover.

[0021] As a further optimization scheme, in order to provide a new embodiment, the cross-section of the gas spring support arm is in the shape of a "mouth", and the gas spring support arm is composed of a second upper cover, a second left facade, a second right facade, a first front lower wing panel and a first rear lower wing panel, the upper ends of the second left facade and the second right facade are vertically integrated on the same side edge of the second upper cover, and the lower ends of the second left facade and the second right facade are vertically integrated on the same side edge of the first front lower wing panel and the first rear lower wing panel.

[0022] As a further optimization scheme, in order to provide a new embodiment, the cross-section of the gas spring support arm is in the shape of a "mountain", and the gas spring support arm is composed of a third cover plate, a third left vertical surface, a third right vertical surface and a first central vertical surface, and the third left vertical surface and the third right vertical surface are vertically integrated on the same side edges of the third cover plate, and the first central vertical surface is vertically integrated in the middle of the bottom surface of the third cover plate along the length direction of the bottom surface of the third cover plate.

[0023] As a further optimization scheme, in order to provide a new embodiment, the cross-section of the gas spring support arm is "T"-shaped, and the gas spring support arm is composed of a fourth cover plate and a second neutral plane. The second neutral plane is vertically integrated in the middle of the bottom surface of the fourth cover plate along the length direction of the bottom surface of the fourth cover plate.

[0024] As a further optimization scheme, in order to provide a new embodiment, the cross-section of the gas spring support arm is an "I" shape, and the gas spring support arm is composed of a fifth cover plate, a third neutral plane, a second front lower wing plate and a second rear lower wing plate. The third neutral plane is vertically integrated along the length direction of the bottom surface of the fifth cover plate in the middle part of the bottom surface of the fifth cover plate, and the second front lower wing plate and the second rear lower wing plate are vertically integrated along the length direction of the third neutral plane at the front and rear sides of the lower end of the third neutral plane.

[0025] A suspension assembly, using the above-mentioned integral casting bridge housing with integrated gas spring support arm, comprises:

[0026] The airbag has a lower end screwed onto the cylindrical airbag mounting plate;

[0027] The upper ends of the two air bags on the same gas spring support arm are fixedly connected with the frame longitudinal beam.

[0028] The utility model provides an integral cast bridge housing and suspension assembly with integrated gas spring support arm through improvement, which has the following improvements and advantages compared with the prior art:

[0029] The one-piece cast bridge housing body is integrated with the gas spring support arm that spans the upper wing surface of the one-piece cast bridge housing body. The gas spring support arm is connected to the upper wing surface, the front wing surface and the rear wing surface of the one-piece cast bridge housing body as a whole; the gas spring support arm is locally thickened, with unequal wall thickness and uniform thickness transition, so that the stress distribution of the one-piece cast bridge housing body is more uniform. The above design makes the overall stiffness and strength of the device better than the traditional structure that is arranged on the lower wing surface of the bridge housing body and connected to the front and rear wing surfaces of the bridge housing body, overcomes the problem that the shape of the gas spring support arm is severely restricted by space, simplifies the external structure of the gas spring support arm, has a lighter weight, and achieves the purpose of fuel saving. The one-piece casting design structure can avoid the influence of loose connectors or welding structure defects, and the overall structure is more stable and safe. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 It is a schematic diagram of the structure of the utility model;

[0032] Figure 2 This is a schematic structural diagram of the first embodiment of the utility model;

[0033] Figure 3 This is a schematic diagram of the structure of the second embodiment of the utility model;

[0034] Figure 4 This is a schematic structural diagram of a third embodiment of the utility model;

[0035] Figure 5 This is a schematic diagram of the structure of the fourth embodiment of the utility model;

[0036] Figure 6 It is a schematic structural diagram of the fifth embodiment of the utility model.

[0037] Description of reference numerals:

[0038] 1-integrated cast bridge housing body, 11-integrated cast bridge housing body, 111-body upper wing surface, 112-body lower wing surface, 113-body front wing surface, 114-body rear wing surface, 12-upward push bracket, 13-downward push bracket, 14-reinforcement ring, 15-rear cover, 16-semi-axle sleeve, 17-brake flange, 171-square and round transition zone, 18-gas spring support arm, 181-front gas spring support arm, 182-rear gas spring support arm, a-first upper cover, b-first left vertical surface, c-first right vertical surface, a1-second upper cover, b1-second left vertical surface, c1-second right vertical surface, d-first front lower wing panel, e-first rear lower wing panel, a2-third cover panel, b2-third left vertical surface, c2-third right vertical surface, f-first central vertical surface, a3-fourth cover panel, f1-second central vertical surface, a4-fifth cover panel, d1-second front lower wing panel, e1-second rear lower wing panel, f2-third central vertical surface, 19-cylindrical airbag mounting plate, 20-airbag mounting hole, 2-airbag, 3-frame longitudinal beam. DETAILED DESCRIPTION

[0039] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0040] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0041] In the description of the present utility model, it should be understood that the terms "first" and "second" are only used for descriptive purposes, and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0042] See also Figure 1-6 , the utility model provides a technical solution:

[0043] Embodiment 1:

[0044] An integral casting bridge housing with integrated gas spring support arm, comprising:

[0045] An integrally cast bridge housing body 1;

[0046] The integrally cast bridge housing body 1 comprises:

[0047] One-piece cast bridge housing body 11;

[0048] There are two gas spring support arms 18, which are respectively across and integrally formed on the top surface and the left and right sides of the front and rear side walls of the integrally cast bridge housing body 11;

[0049] The cross-sectional width of the gas spring support arm 18 gradually decreases from the front and rear side walls of the integrally cast bridge housing body 11 to the two sides through a large fillet transition and extends to the end in a trapezoidal shape. This design makes the thickness of the middle part of the gas spring support arm 18 greater than the thickness of the two sides, and the thickness transitions evenly, so that the stress distribution of the integrally cast bridge housing body 11 is more uniform;

[0050] Both ends of the gas spring support arm 18 are fixedly connected with a cylindrical air bag mounting plate 19 .

[0051] In some embodiments, in order to simplify the overall casting process, facilitate production, and ensure sufficient strength, the integrally cast bridge housing body 1 is made of high-strength ductile iron material, and other metal materials that meet the requirements may also be used.

[0052] In some embodiments, in order to further improve the connection strength between the gas spring support arm 18 and the integrally cast bridge housing body 11, the upper surface of the integrally cast bridge housing body 11 is the body upper wing surface 111, the lower surface of the integrally cast bridge housing body 11 is the body lower wing surface 112, the front wall of the integrally cast bridge housing body 11 is the body front wing surface 113, and the rear wall of the integrally cast bridge housing body 11 is the body rear wing surface 114;

[0053] The middle portion of the gas spring support arm 18 is in the shape of a bow, the middle section of the bow-shaped middle portion is a straight section, and both ends of the straight section are integrally formed with arc sections;

[0054] The straight portion spans and is integrally formed on the upper wing surface 111 of the main body, and the two arc segments are integrally connected with the front wing surface 113 of the main body and the rear wing surface 114 of the main body respectively;

[0055] The two ends of the bow-shaped middle part of the gas spring support arm 18 extend outward to form a front gas spring support arm 181 and a rear gas spring support arm 182 respectively. The cylindrical airbag mounting plate 19 is transitionally connected to the corresponding front gas spring support arm 181 and the rear gas spring support arm 182 by means of rounded corners. Airbag mounting holes 20 are opened on the surfaces of the four cylindrical airbag mounting plates 19, and the lower end of the airbag 2 is screwed into the airbag mounting hole 20.

[0056] In some embodiments, in order to facilitate the connection of the integral cast bridge housing body 11 with other devices, the middle part of the upper wing surface 111 of the body is transitioned to the upper push bracket 12 through rounded corners on all sides, the left and right sides of the lower wing surface 112 of the body are transitioned to the two lower push brackets 13 through rounded corners on all sides, the middle part of the front wing surface 113 of the body is transitioned to the reinforcement ring 14 through rounded corners, and the rear wing surface 114 of the body is transitioned to the rear cover 15 through rounded corners. Square and round transition areas 171 are provided at both ends of the integral cast bridge housing body 11. Both ends of the integral cast bridge housing body 11 are connected to the brake flange 17 through the square and round transition areas 171. The brake flange 17 is fixedly connected with a half-axle sleeve 16. The upper push bracket 12, the lower push bracket 13, the reinforcement ring 14 and the half-axle sleeve 16 are all used to connect and fix with other structures. It is the existing structure of the bridge housing. These structures and the rear cover 15 are cast integrally with the integral cast bridge housing body 11.

[0057] The gas spring support arm 18 is located on one side of the brake flange 17 on the same side close to the middle of the integrally cast bridge housing body 11 .

[0058] like Figure 2 As shown, the cross-section of the gas spring support arm 18 is in the shape of a "door", and the gas spring support arm 18 is composed of a first upper cover a, a first left vertical surface b, and a first right vertical surface c. The first left vertical surface b and the first right vertical surface c are vertically integrated on the same side edge of the first upper cover a.

[0059] A suspension assembly, using the above-mentioned integral casting bridge housing with integrated gas spring support arm, comprises:

[0060] An airbag 2, the lower end of which is screwed to a cylindrical airbag mounting plate 19;

[0061] The upper ends of two airbags 2 on the same air spring support arm 18 are fixedly connected to a vehicle frame longitudinal beam 3, and the connection and fixation between the integral casting axle housing body 1 and the vehicle frame are realized through a suspension assembly.

[0062] Embodiment Two:

[0063] As Figure 3 shown, the cross-section of the air spring support arm 18 is in the shape of a "square", and the air spring support arm 18 is composed of a second upper cover a1, a second left vertical surface b1, a second right vertical surface c1, a first front lower wing plate d, and a first rear lower wing plate e. The upper ends of the second left vertical surface b1 and the second right vertical surface c1 are vertically integrally formed on the same-side edges of the second upper cover a1, and the lower ends of the second left vertical surface b1 and the second right vertical surface c1 are vertically integrally formed on the same-side edges of the first front lower wing plate d and the first rear lower wing plate e. The difference between Embodiment Two and Embodiment One is that: the first front lower wing plate d and the first rear lower wing plate e are added.

[0064] Embodiment Three:

[0065] As Figure 4 shown, the cross-section of the air spring support arm 18 is in the shape of a "mountain", and the air spring support arm 18 is composed of a third cover plate a2, a third left vertical surface b2, a third right vertical surface c2, and a first middle vertical surface f. The third left vertical surface b2 and the third right vertical surface c2 are vertically integrally formed on the same-side edges of the third cover plate a2, and the first middle vertical surface f is vertically integrally formed in the middle of the bottom surface of the third cover plate a2 along the length direction of the bottom surface of the third cover plate a2; the difference between Embodiment Three and Embodiment One is that: the first middle vertical surface f is added, and the first middle vertical surface f penetrates through the air spring support arm 18 along the length direction.

[0066] Embodiment Four:

[0067] As Figure 5 shown, the cross-section of the air spring support arm 18 is in the shape of a "T", and the air spring support arm 18 is composed of a fourth cover plate a3 and a second middle vertical surface f1. The second middle vertical surface f1 is vertically integrally formed in the middle of the bottom surface of the fourth cover plate a3 along the length direction of the bottom surface of the fourth cover plate a3. The difference between Embodiment Four and Embodiment Three is that: the third left vertical surface b2 and the third right vertical surface c2 in Embodiment Three are removed.

[0068] Embodiment Five:

[0069] As Figure 6As shown, the cross-section of the gas spring support arm 18 is an "I" shape, and the gas spring support arm 18 is composed of a fifth cover plate a4, a third neutral plane f2, a second front lower wing plate d1 and a second rear lower wing plate e1. The third neutral plane f2 is vertically integrated at the middle part of the bottom surface of the fifth cover plate a4 along the length direction of the bottom surface of the fifth cover plate a4, and the second front lower wing plate d1 and the second rear lower wing plate e1 are vertically integrated at the front and rear sides of the lower end of the third neutral plane f2 along the length direction of the third neutral plane f2. The difference between Example 5 and Example 4 is that a second front lower wing plate d1 and a second rear lower wing plate e1 are additionally provided.

[0070] Working principle:

[0071] The two gas spring support arms 18 are respectively spanned and integrally formed on the top surface and the left and right sides of the front and rear side walls of the integrally cast bridge housing body 11; the above design makes the overall rigidity and strength of the device better than the traditional structure arranged on the lower wing surface of the bridge housing body and connected to the front and rear wing surfaces of the bridge housing body, overcomes the problem that the shape of the gas spring support arm 18 is seriously restricted by space, simplifies the appearance structure of the gas spring support arm 18, has a lighter weight, and achieves the purpose of fuel saving, and the integrally cast design structure can avoid the influence of loose connections or welding structural defects, and the overall structure is more stable and safe;

[0072] The cross-sectional width trajectory of the gas spring support arm 18 gradually decreases from the front and rear side walls of the one-piece cast bridge housing body 11 to both sides through a large radius transition and extends to the end in a trapezoidal shape. This design makes the thickness of the middle part of the gas spring support arm 18 greater than the thickness on both sides, and the thickness transitions evenly, making the stress distribution of the one-piece cast bridge housing body 11 more uniform.

[0073] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. An integral cast bridge housing with integrated gas spring support arm, characterized in that: include: An integrally cast bridge housing body (1); The integrally cast bridge housing body (1) comprises: An integral cast bridge housing body (11); There are two gas spring support arms (18), and the two gas spring support arms (18) are respectively spanned and integrally formed on the top surface and the left and right sides of the front and rear side walls of the integrally cast bridge housing body (11); The cross-sectional width track of the gas spring support arm (18) gradually narrows from the front and rear side walls of the integrally cast bridge housing body (11) to both sides through a large fillet transition and extends to the end in a trapezoidal shape; Both ends of the gas spring support arm (18) are fixedly connected with a cylindrical air bag mounting plate (19).

2. The integral casting bridge housing with integrated gas spring support arm according to claim 1, characterized in that: The integrally cast bridge housing body (1) is made of high-strength ductile iron material.

3. The integral casting bridge housing with integrated gas spring support arm according to claim 1, characterized in that: The upper surface of the integrally cast bridge housing body (11) is the main body upper wing surface (111), the lower surface of the integrally cast bridge housing body (11) is the main body lower wing surface (112), the front wall of the integrally cast bridge housing body (11) is the main body front wing surface (113), and the rear wall of the integrally cast bridge housing body (11) is the main body rear wing surface (114); The middle portion of the gas spring support arm (18) is in the shape of a bow, the middle section of the bow-shaped middle portion is a straight section, and both ends of the straight section are integrally formed with arc sections; The straight portion spans across and is integrally formed on the upper wing surface (111) of the main body, and the two arc segments are integrally formed and connected to the front wing surface (113) of the main body and the rear wing surface (114) of the main body respectively; Two ends of the bow-shaped middle portion of the gas spring support arm (18) extend outwards to form a front gas spring support arm (181) and a rear gas spring support arm (182) respectively.

4. The integral casting bridge housing with integrated gas spring support arm according to claim 3, characterized in that: An upper push bracket (12) is integrally formed in the middle of the upper wing surface (111) of the main body, and lower push brackets (13) are integrally formed on the left and right sides of the lower wing surface (112) of the main body, respectively. A reinforcement ring (14) is integrally formed in the middle of the front wing surface (113) of the main body, and a rear cover (15) is integrally formed on the rear wing surface (114) of the main body. Braking flanges (17) are integrally formed at both ends of the integrally cast bridge housing body (11), and a half-axle sleeve (16) is fixedly connected to the braking flange (17); The gas spring support arm (18) is located on one side of the brake flange (17) on the same side close to the middle of the integrally cast bridge housing body (11).

5. The integral casting bridge housing with integrated gas spring support arm according to claim 1, characterized in that: The cross section of the gas spring support arm (18) is in the shape of a "door", and the gas spring support arm (18) is composed of a first upper cover (a), a first left vertical surface (b), and a first right vertical surface (c), wherein the first left vertical surface (b) and the first right vertical surface (c) are vertically integrally formed on the same side edge of the first upper cover (a).

6. The integral casting bridge housing with integrated gas spring support arm according to claim 1, characterized in that: The cross-section of the air spring support arm (18) is in the shape of a "square", and the air spring support arm (18) is composed of a second upper cover (a1), a second left vertical surface (b1), a second right vertical surface (c1), a first front lower wing plate (d), and a first rear lower wing plate (e). The upper ends of the second left vertical surface (b1) and the second right vertical surface (c1) are integrally formed vertically on the same-side edge of the second upper cover (a1), and the lower ends of the second left vertical surface (b1) and the second right vertical surface (c1) are integrally formed vertically on the same-side edge of the first front lower wing plate (d) and the first rear lower wing plate (e).

7. The integral casting bridge housing with integrated gas spring support arm according to claim 1, characterized in that: The cross-section of the air spring support arm (18) is in the shape of a "mountain", and the air spring support arm (18) is composed of a third cover plate (a2), a third left vertical surface (b2), a third right vertical surface (c2), and a first middle vertical surface (f). The third left vertical surface (b2) and the third right vertical surface (c2) are integrally formed vertically on the same-side edge of the third cover plate (a2), and the first middle vertical surface (f) is integrally formed vertically in the middle of the bottom surface of the third cover plate (a2) along the length direction of the bottom surface of the third cover plate (a2).

8. The integral casting bridge housing with integrated gas spring support arm according to claim 1, characterized in that: The cross-section of the air spring support arm (18) is in the shape of a "T", and the air spring support arm (18) is composed of a fourth cover plate (a3) and a second middle vertical surface (f1). The second middle vertical surface (f1) is integrally formed vertically in the middle of the bottom surface of the fourth cover plate (a3) along the length direction of the bottom surface of the fourth cover plate (a3).

9. The integral casting bridge housing with integrated gas spring support arm according to claim 1, characterized in that: The cross-section of the air spring support arm (18) is in the shape of an "I", and the air spring support arm (18) is composed of a fifth cover plate (a4), a third middle vertical surface (f2), a second front lower wing plate (d1), and a second rear lower wing plate (e1). The third middle vertical surface (f2) is integrally formed vertically in the middle of the bottom surface of the fifth cover plate (a4) along the length direction of the bottom surface of the fifth cover plate (a4), and the second front lower wing plate (d1) and the second rear lower wing plate (e1) are integrally formed vertically on the front and rear sides of the lower end of the third middle vertical surface (f2) along the length direction of the third middle vertical surface (f2).

10. A suspension assembly, using an integral cast bridge housing with integrated gas spring support arm as claimed in any one of claims 1 to 9, characterized in that: Including: An airbag (2), the lower end of which is screwed to a cylindrical airbag mounting disc (19); The upper ends of two airbags (2) on the same air spring support arm (18) are fixedly connected to a vehicle frame longitudinal beam (3).

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