Auxiliary frame and vehicle body connecting structure thereof

Abstract

The utility model belongs to the technical field of vehicle manufacturing, and particularly relates to an auxiliary frame vehicle body connecting structure and an auxiliary frame. The auxiliary frame and vehicle body connecting structure comprises a first plate body, a second plate body and a lining. The first plate body is provided with a first surface and a second surface in the Z direction. The second plate body is provided with a third surface and a fourth surface in the Z direction, the third surface is attached to and connected with the first surface, the fourth surface is attached to and connected with the second surface, so that the first plate body and the second plate body define a cavity together, and the attaching position of the third surface and the first surface extends to the side, away from the auxiliary frame, of the second plate body in the Y direction. The lining is arranged in the Z direction, at least part of the lining is located in the cavity, and the part, located in the cavity, of the lining is connected with at least one of the first plate body and the second plate body. In the structure, the attaching position of the plate body and the lap joint position of the plate body and the lining can be connected through the welding technology, it is guaranteed that the whole structure has enough structural strength, the fatigue damage risk is reduced, and the service life of parts is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model belongs to vehicle manufacturing technical field, especially a kind of auxiliary frame vehicle body connecting structure and auxiliary frame. BACKGROUND

[0002] Auxiliary frame is an important component of vehicle chassis, and is the connecting component between suspension system and vehicle body, which plays the role of bearing suspension system and sharing vehicle body load.

[0003] Auxiliary frame provides a relatively stable mounting platform for suspension system, which is generally connected with vehicle body through vehicle body connecting structure. During driving, vibration and noise caused by uneven road surface can be transmitted to vehicle body through auxiliary frame.

[0004] At present, vehicle body connecting structure of auxiliary frame is designed to reduce the transmission of vibration and noise, but it also leads to low structural strength, and fatigue damage is easy to occur. INVENTION CONTENTS

[0005] The utility model provides a kind of auxiliary frame vehicle body connecting structure and auxiliary frame to solve the technical problem that the structure for being connected with vehicle body on existing auxiliary frame is prone to fatigue damage.

[0006] According to an aspect of the utility model, a kind of auxiliary frame vehicle body connecting structure is provided, including first plate body, second plate body and bushing. First plate body has first surface and second surface in Z direction. Second plate body has third surface and fourth surface in Z direction, third surface is attached and is connected with first surface, fourth surface is attached and is connected with second surface, so that first plate body is enclosed with first plate body and forms cavity, and the attachment position of third surface and first surface is extended to the side of second plate body away from auxiliary frame along Y direction. Bushing is arranged along Z direction and at least part is located in cavity, and the part of bushing in cavity is connected with at least one of first plate body and second plate body.

[0007] In the optional scheme of the utility model, first plate body includes first plate part and second plate part, and second plate body includes third plate part and fourth plate part;Wherein, first plate part and fourth plate part are spaced apart in Z direction, second plate part and third plate part are spaced apart in X direction, and the part of at least one of second plate part and third plate part is connected with the part of bushing in cavity.

[0008] In the optional scheme of the utility model, first plate part has first surface, second plate part has second surface, third plate part has third surface, and fourth plate part has fourth surface;Second plate part and / or third plate part are provided with first gap and second gap spaced apart along Z direction, and form upper section, middle section and lower section, and middle section is connected with the part of bushing in cavity.

[0009] In the optional scheme of the utility model, the Y-shaped outer end side of the middle section is attached to and connected to the outer peripheral side of the bushing.

[0010] In the optional scheme of the utility model, the inner end of the first gap and / or the inner end of the second gap is provided with a through hole.

[0011] In the optional scheme of the utility model, in the case that the through hole is a circular hole, the diameter of the through hole is 1mm to 3mm.

[0012] In the optional scheme of the utility model, the first plate part is provided with a first via hole, and the fourth plate part is provided with a second via hole; one end of the bushing can pass through the first via hole and abut against the second via hole.

[0013] In the optional scheme of the utility model, the bushing comprises a main body part and a positioning part, the positioning part protrudes from the main body part in the circumferential direction; the positioning part is located outside the cavity and connected to the first plate body, and part of the main body part is located inside the cavity and connected to the second plate body at an end away from the positioning part.

[0014] In the optional scheme of the utility model, the surface of the positioning part away from the first plate body is formed with a plurality of teeth arranged in the circumferential direction at intervals.

[0015] According to another aspect of the utility model, a subframe is provided, the subframe comprising a left frame longitudinal beam and a right frame longitudinal beam, at least one of the left frame longitudinal beam and the right frame longitudinal beam being provided with the subframe body connecting structure, and the subframe body connecting structure being used for connecting with the vehicle body.

[0016] In summary, the subframe body connecting structure and the subframe provided by the utility model have at least the following beneficial effects:

[0017] In the subframe body connecting structure, the first plate body and the second plate body are overlapped and have two overlapping positions, the two overlapping positions are respectively the attached position of the first surface on the first plate body and the third surface on the second plate body, and the attached position of the second surface on the first plate body and the fourth surface on the second plate body.

[0018] In specific application, the three overlapping positions can be connected by using a welding process, so as to ensure that the whole structure has sufficient structural strength, reduce the risk of fatigue damage, and prolong the service life of the parts. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed in the specific embodiments or the prior art description. Obviously, the drawings described below are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0020] Figure 1 A schematic view of a subframe according to one of the embodiments of the present application;

[0021] Figure 2 A Figure 1 A partial enlarged view of S in the left or right body connecting beam of the vehicle body;

[0022] Figure 3 A Figure 2 A schematic view of a partial view in another perspective view;

[0023] Figure 4 A Figure 2 A schematic view of a partial view in another perspective view.

[0024] The reference signs are as follows:

[0025] 1000, subframe;

[0026] 100, subframe body connecting structure; 101, upper section; 102, middle section; 103, lower section; 104, first weld; 105, second weld; 106, third weld; 107, fourth weld

[0027] 10, first plate body; 11, first plate part; 12, second plate part; A1, first surface; A2, second surface;

[0028] 20, second plate body; 21, third plate part; 22, fourth plate part; B1, third surface; B2, fourth surface; C1, first gap; C2, second gap; H1, through hole;

[0029] 30, bushing; 31, main body part; 32, positioning part; 321, tooth;

[0030] 400, left longitudinal beam of the frame; 500, right longitudinal beam of the frame; 600, left connecting beam of the vehicle body; 700, right connecting beam of the vehicle body. DETAILED DESCRIPTION

[0031] In order to make the above and other features and advantages of the present application clearer, the present application will be further described below with reference to the drawings. It should be understood that the specific embodiments given herein are for the purpose of explanation and are only exemplary, but are not limiting.

[0032] In addition, as the features limited with "first", "second" are used for the purpose of description only, it cannot be understood as indicating or implying relative importance or implying the number of the indicated technical features. The features limited with "first", "second" can be explicitly or implicitly included at least one of the limited features. As the description of "multiple" appears, the general meaning is at least two, such as two, three, etc., unless otherwise specifically limited.

[0033] It should be noted that "X direction" mentioned in the utility model is the front-rear direction of the vehicle, "Y direction" is the left-right direction of the vehicle, and "Z direction" is the height direction of the vehicle.

[0034] Figure 1 A schematic view of the subframe 1000 according to one of the embodiments of the utility model is provided. Please refer to Figure 1 The subframe 1000 includes a left frame longitudinal beam 400 and a right frame longitudinal beam 500.

[0035] Specifically, the subframe 1000 is a frame structure spliced by a plurality of beam members, wherein the two beam members on the left and right sides correspond to the left frame longitudinal beam 400 and the right frame longitudinal beam 500 respectively.

[0036] In this embodiment, the left frame longitudinal beam 400 and the right frame longitudinal beam 500 are each provided with a body connecting beam, and the body connecting beam on the left frame longitudinal beam 400 corresponds to a left body connecting beam 600, and the body connecting beam on the right frame longitudinal beam 500 corresponds to a right body connecting beam 700.

[0037] The Y direction outer end of the left body connecting beam 600 and the right body connecting beam 700 is formed with a subframe body connecting structure 100, which is used for connecting with the body.

[0038] In this embodiment, the left frame longitudinal beam 400 and the right frame longitudinal beam 500 are each provided with a subframe body connecting structure 100. In one embodiment, only the left frame longitudinal beam 400 is provided with a subframe body connecting structure 100, and in another embodiment, only the right frame longitudinal beam 500 is provided with a subframe body connecting structure 100. In other words, at least one of the left frame longitudinal beam 400 and the right frame longitudinal beam 500 is provided with the above-mentioned subframe body connecting structure. In these embodiments, the subframe body connecting structure 100 can be a rigid joint structure.

[0039] It should be noted that the "inner" and "outer" relationship here is judged based on the center of the subframe, and the inner and outer are relative relationship, the inner is close to the center, and the outer is far away from the center.

[0040] Figure 2 For Figure 1An enlarged view of a portion of the left body connecting beam 600 or the right body connecting beam 700 at S. Figure 3 As shown in FIG. 1, the left body connecting beam 600 and the right body connecting beam 700 are connected to the subframe 200. Figure 2 As shown in FIG. 1, the left body connecting beam 600 and the right body connecting beam 700 are connected to the subframe 200. Figure 4 As shown in FIG. 1, the left body connecting beam 600 and the right body connecting beam 700 are connected to the subframe 200. Figure 2 As shown in FIG. 1, the left body connecting beam 600 and the right body connecting beam 700 are connected to the subframe 200. Figures 2 to 4 In some optional embodiments, the subframe body connecting structure 100 includes a first plate body 10, a second plate body 20, and a bushing 30.

[0041] The first plate body 10 has a first surface A1 and a second surface A2 in the Z direction. The second plate body 20 has a third surface B1 and a fourth surface B2 in the Z direction, the third surface B1 is attached to and connected with the first surface A1, and the fourth surface B2 is attached to and connected with the second surface A2, so that the first plate body 10 and the second plate body 20 together enclose a cavity R, and the attached position of the third surface B1 and the first surface A1 extends to the side of the second plate body 20 away from the subframe in the Y direction.

[0042] The bushing 30 is arranged in the Z direction and at least partially located in the cavity R, and the portion of the bushing 30 located in the cavity R is connected with at least one of the first plate body 10 and the second plate body 20.

[0043] In the embodiment, the first plate body 10 and the second plate body 20 are spliced together and enclose the cavity R together. Specifically, the first surface A1 of the first plate body 10 in the Z direction is attached to the third surface B1 of the second plate body 20 in the Z direction, and the second surface A2 of the first plate body 10 in the Z direction is attached to the fourth surface B2 of the second plate body 20 in the Z direction, so that the first plate body 10 and the second plate body 20 are spliced together.

[0044] It should be understood that the attached position of the first surface A1 and the third surface B1 is one joint position of the first plate body 10 and the second plate body 20, and can be connected by a welding process, and the attached position of the second surface A2 and the fourth surface B2 is another joint position of the first plate body 10 and the second plate body 20, and can be connected by a welding process.

[0045] In particular, the attached position of the third surface B1 and the first surface A1 extends to the Y direction outermost side of the second plate body 20, i.e. the Y direction outer end of the second plate body 20, which is the side away from the subframe. In this way, the Y direction outermost part of the third surface B1 is also attached to the first surface A1 on the first plate body 10, ensuring that the first joint position has sufficient welding length and high structural strength.

[0046] In the illustrated embodiment, the portion of the bushing 30 located in the cavity R is connected to the second plate body 20. Of course, this is not limiting, and in one embodiment, the portion of the bushing 30 located in the cavity R is connected to the first plate body 10. In another alternative embodiment, the portion of the bushing 30 located in the cavity R is connected to both the first plate body 10 and the second plate body 20. In a specific application, the bushing 30 and the corresponding plate body can be connected by a welding process.

[0047] As can be seen, both locations where the first plate body 10 and the second plate body 20 are attached can be connected by a welding process. Further, at least one of the first plate body 10 and the second plate body 20 and the portion of the bushing 30 located in the cavity R can be connected by a welding process to ensure that the three components have sufficient structural strength after being spliced together, reduce the risk of fatigue damage, and prolong the service life of the components.

[0048] In an alternative embodiment, the bushing 30 includes a main body portion 31 and a positioning portion 32, and the positioning portion 32 protrudes circumferentially from the main body portion 31.

[0049] The positioning portion 32 is located outside the cavity R and is connected to the first plate body 10, and the portion of the main body portion 31 located in the cavity R is connected to the second plate body 20 at an end away from the positioning portion 32.

[0050] In the present embodiment, the bushing 30 can include two parts, namely the main body portion 31 and the positioning portion 32, and the positioning portion 32 is located at the upper end of the main body portion 31 and protrudes circumferentially from the main body portion 31. In one embodiment, the positioning portion 32 is an annular boss.

[0051] The positioning portion 32 is located outside the cavity R, and the portion of the main body portion 31 located in the cavity R. For this bushing 30, the upper end of the main body portion 31 has the positioning portion 32 to achieve connection with the first plate body 10, and the lower end of the main body portion 31 is connected to the second plate body 20, so that the entire bushing 30 is clamped and fixed in position.

[0052] Further, the surface of the positioning portion 32 facing away from the first plate body 10 is formed with a plurality of teeth 321 arranged circumferentially at intervals. These teeth 321 can increase the damping properties of the bushing, absorb more vibrations, reduce vibrations and noise transmitted to the vehicle body, and improve the comfort of the vehicle.

[0053] In a further alternative embodiment, the first plate body 10 includes a first plate portion 11 and a second plate portion 12, and the second plate body 20 includes a third plate portion 21 and a fourth plate portion 22.

[0054] In this embodiment, the first plate portion 11 and the fourth plate portion 22 are spaced apart in the Z direction, and the second plate portion 12 and the third plate portion 21 are spaced apart in the X direction. The portion of at least one of the second plate portion 12 and the third plate portion 21 is connected to the portion of the bushing 30 located in the cavity R.

[0055] In the embodiment, the first plate body 10 and the second plate body 20 have similar structures, both of which include two plate portions in different orientations. Moreover, the two plate portions on the same plate body are arranged in the X direction and the Z direction, so that the first plate portion 11 and the fourth plate portion 22 are arranged in the Z direction, and the second plate portion 12 and the third plate portion 21 are arranged in the X direction.

[0056] It can be understood that, due to the different orientations of the plate portions, the first plate body 10 and the second plate body 20 can both be bent sheet metal parts, and the cross sections are similar to L-shaped.

[0057] Further, the lower surface of the first plate portion 11 is attached to the upper surface of the third plate portion 21, and the lower surface of the second plate portion 12 is attached to the upper surface of the fourth plate portion 22, so that the first plate body 10 and the second plate body 20 in the shape of L are spliced and together enclose the cavity R.

[0058] In an embodiment, the part of the bushing 30 in the cavity R is a main body portion 31, and the part of at least one of the second plate portion 12 and the third plate portion 21 arranged in the X direction is also connected to the main body portion 31. Here, the part of the second plate portion 12 and the part of the third plate portion 21 can refer to the part in the outermost end of the Y direction of the plate portion. That is, the part in the outermost end of the Y direction of the second plate portion 12 and the part in the outermost end of the Y direction of the third plate portion 21 can be connected to the main body portion 31, or the part in the outermost end of the Y direction of the second plate portion 12 or the part in the outermost end of the Y direction of the third plate portion 21 is connected to the main body portion 31.

[0059] Please refer to Figure 2 and Figure 3 In an embodiment, the attachment position of the first surface A1 and the third surface B1 is above and relatively in front of the attachment position of the second surface A2 and the fourth surface B2, and the attachment position of the second plate portion 12 and the third plate portion 21 on the bushing 30 can only be between the two attachment positions in the Z direction and the X direction, so that a multi-position lap is formed in space, which is more conducive to ensuring the structural strength.

[0060] In a further optional embodiment, the first plate portion 11 has a first surface A1, the second plate portion 12 has a second surface A2, the third plate portion 21 has a third surface B1, and the fourth plate portion 22 has a fourth surface B2. The second plate portion 12 and / or the third plate portion 21 are provided with a first gap C1 and a second gap C2 arranged in the Z direction, and form an upper section 101, a middle section 102 and a lower section 103, and the middle section 102 is connected to the part of the bushing 30 in the cavity R.

[0061] In the embodiment, the lower surface of the first plate portion 11 corresponds to the first surface A1, the upper surface of the third plate portion 21 corresponds to the third surface B1, the lower surface of the second plate portion 12 corresponds to the second surface A2, and the upper surface of the fourth plate portion 22 corresponds to the fourth surface B2.

[0062] For the purpose of facilitating the understanding of the present solution, the third plate portion 21 is taken as an example in the drawings, which has the first slit C1 and the second slit C2.

[0063] As can be understood, the third plate portion 21 is divided into three segments in the Z direction, i.e., the upper segment 101, the middle segment 102 and the lower segment 103, due to the two slits arranged in the Z direction on the third plate portion 21.

[0064] The upper surface of the upper segment 101 corresponds to the third surface B1 and is attached to the lower surface (the first surface A1) of the first plate portion 11. In a specific application, the upper surface of the upper segment 101 is lap-welded to the lower surface (the first surface A1) of the first plate portion 11, thereby forming the first weld 104.

[0065] The lower segment 103 is connected to the fourth plate portion 22, and the upper surface of the fourth plate portion 22 corresponds to the fourth surface B2 and is attached to the lower surface (the second surface A2) of the second plate portion 12. In a specific application, the upper surface of the fourth plate portion 22 is lap-welded to the lower surface (the second surface A2) of the second plate portion 12, thereby forming the third weld 106.

[0066] Further, the Y-direction outer end side of the middle segment 102 is attached to and connected to the outer peripheral side of the bushing 30. In the embodiment, the middle segment 102 is bent towards the bushing 30, and the Y-direction outer end side of the middle segment 102 is attached to the outer peripheral side of the bushing 30. In a specific application, the Y-direction outer end side of the middle segment 102 and the outer peripheral side of the main body portion 31 of the bushing 30 are connected by welding, and the second weld 105 is formed.

[0067] It should be noted that the first slit C1 and the second slit C2 are not limited to being arranged only on the third plate portion 21. Of course, two slits can also be arranged on the second plate portion 12, or two slits are arranged on the second plate portion 12 and the third plate portion 21 respectively. Of course, the number of slits is not limited to two.

[0068] It should be noted that the first slit C1 and the second slit C2 can play a role in reducing vibration and noise, so as to ensure the handling performance of the vehicle and reduce the acoustic risk. In an alternative embodiment, the inner end of the first slit C1 and / or the inner end of the second slit C2 is provided with a through hole H1. The through hole H1 can disperse stress and reduce local stress concentration.

[0069] In the illustrated embodiment, the inner end of the first slit C1 and the inner end of the second slit C2 are provided with a through hole H1. Of course, only the inner end of the first slit C1 has a through hole H1, or only the inner end of the second slit C2 has a through hole H1.

[0070] In a specific application, the through hole H1 is a circular hole, but it is not limited to this, for example, a water drop-shaped hole, an oval hole, etc.

[0071] In an alternative embodiment, in the case of a circular hole of the through hole H1, the diameter of the through hole H1 is 1mm to 3mm. In a specific application, the first slit C1 and the second slit C2 have the same length, and correspondingly, the through holes H1 at the inner ends of the two are aligned in the Z direction. The slit width of the first slit C1 and the second slit C2 is about 0.1mm, and the length is 6mm to 20mm.

[0072] In an alternative embodiment, the first plate part 11 is provided with a first through hole, and the fourth plate part 22 is provided with a second through hole. One end of the bushing 30 can pass through the first through hole and abut against the second through hole.

[0073] In the embodiment, the first through hole and the second through hole are used to cooperate with the bushing 30. In an embodiment, the upper end of the main body part 31 in the bushing 30 is a positioning part 32, and the positioning part 32 is an annular boss. The main body part 31 can pass through the first through hole and abut against the second through hole, i.e., the position of the second through hole on the fourth plate part 22.

[0074] In other words, the diameter of the first through hole is greater than the diameter of the main body part 31 and less than the diameter of the positioning part 32, and the diameter of the second through hole is less than the diameter of the main body part 31.

[0075] In a specific application, the positioning part 32 abuts against the first plate part 11 and is fixed by a welding process, forming a fourth weld 107. The lower end of the main body part 31 abuts against the fourth plate part 22 and is fixed by a welding process.

[0076] In an embodiment, the first through hole and the second through hole are coaxially arranged. It can be understood that the bushing 30 is provided with a through hole allowing a connecting column to pass through, and the connecting column here can be a bolt, a bolt, etc.

[0077] Although the embodiments of the utility model have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary and cannot be understood as limiting the utility model. Those skilled in the art can change, modify, replace and modify the above-mentioned embodiments within the scope of the utility model.

Claims

1. A subframe body connection structure, characterized in that, Comprise: a first plate body (10) having a first surface (A1) and a second surface (A2) in a Z direction; a second plate body (20) having a third surface (B1) and a fourth surface (B2) in the Z direction, the third surface (B1) being attached to and connected with the first surface (A1), and the fourth surface (B2) being attached to and connected with the second surface (A2) to form a cavity (R) together with the first plate body (10) and the second plate body (20), and the attachment position of the third surface (B1) to the first surface (A1) extending to a side of the second plate body (20) away from a subframe in a Y direction; and a bushing (30) disposed in the Z direction and at least partially located in the cavity (R), and a portion of the bushing (30) located in the cavity (R) being connected with at least one of the first plate body (10) and the second plate body (20).

2. The subframe body connection structure according to claim 1, characterized in that: the first plate body (10) comprises a first plate portion (11) and a second plate portion (12), and the second plate body (20) comprises a third plate portion (21) and a fourth plate portion (22); wherein the first plate portion (11) and the fourth plate portion (22) are spaced apart in the Z direction, the second plate portion (12) and the third plate portion (21) are spaced apart in an X direction, and a portion of at least one of the second plate portion (12) and the third plate portion (21) is connected with the portion of the bushing (30) located in the cavity (R).

3. The subframe body connection structure according to claim 2, characterized in that: the first plate portion (11) has the first surface (A1), the second plate portion (12) has the second surface (A2), the third plate portion (21) has the third surface (B1), and the fourth plate portion (22) has the fourth surface (B2); the second plate portion (12) and / or the third plate portion (21) is provided with a first gap (C1) and a second gap (C2) spaced apart in the Z direction, and forms an upper section (101), a middle section (102), and a lower section (103), and the middle section (102) is connected with the portion of the bushing (30) located in the cavity (R).

4. The subframe body connection structure according to claim 3, characterized by The Y-direction outer end side of the middle section (102) is attached to and connected with the outer peripheral side of the bushing (30).

5. The subframe body connection structure according to claim 3, characterized by The inner end of the first gap (C1) and / or the inner end of the second gap (C2) is provided with a through hole (H1).

6. The subframe body connection structure according to claim 5, characterized by In the case of a circular hole, the diameter of the through hole (H1) is 1mm to 3mm.

7. The subframe body connection structure according to claim 3, characterized by The first plate portion (11) is provided with a first via hole, and the fourth plate portion (22) is provided with a second via hole; One end of the bushing (30) can pass through the first via hole and abut against the second via hole.

8. The subframe body connection structure according to any one of claims 1-7, characterized in that: the bushing (30) comprises a main body portion (31) and a positioning portion (32) protruding in a circumferential direction from the main body portion (31). The positioning portion (32) is located outside the cavity (R) and connected to the first plate body (10), and a part of the main body portion (31) is located inside the cavity (R) and connected to the second plate body (20) at an end away from the positioning portion (32).

9. The subframe body connection structure according to claim 8, characterized by A surface of the positioning portion (32) away from the first plate body (10) is formed with a plurality of teeth (331) arranged at intervals in the circumferential direction.

10. A subframe characterized by The subframe comprises a left frame longitudinal beam and a right frame longitudinal beam, at least one of the left frame longitudinal beam and the right frame longitudinal beam is provided with the subframe body connecting structure according to any one of claims 1 to 9, and the subframe body connecting structure is used for connecting with a vehicle body.

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