Connecting structure, auxiliary frame and automobile

Abstract

The utility model relates to a connecting structure, an auxiliary frame and an automobile. A connecting structure is used for connecting an auxiliary frame and a vehicle body, and comprises a first body, a second body, a third body and a fourth body, the second body is connected with the vehicle body, and the second body is connected with the first body through a connecting piece; the first vibration isolation piece is used for vibration isolation between the second body and the first body; the second vibration isolation piece is arranged on the second body and used for vibration isolation between the second body and the vehicle body; wherein the first body is provided with a first positioning cavity, and / or the second body is provided with a second positioning cavity, an installation area is defined by the first positioning cavity and the second positioning cavity, and the first vibration isolation piece is assembled in the installation area. The problem of insufficient vibration isolation is solved, the NVH performance of the whole vehicle is improved, and the NVH performance, operation stability, smoothness and the like are balanced.

Description

Technical Field

[0001] The present application relates to the technical field of new energy vehicles, and in particular to a connection structure, a subframe and a vehicle. Background Art

[0002] New energy vehicles are the current trend of automobile development. The torque, vibration and other characteristics of new energy vehicle motors are quite different from those of traditional fuel vehicles. Insufficient vibration isolation often occurs, causing comfort problems.

[0003] In the existing technology, the subframe of automobile products is generally installed with the body through a hard connection of bolts, which is insufficient in vibration isolation. In order to solve this problem, a bushing vibration isolation method has emerged, but since the bushing is usually installed in an interference fit in the connection hole, the range of motion it can provide is small, the vibration isolation effect is weak, and it is difficult to achieve good decoupling in the Y and Z directions, and it is difficult to balance the NVH, handling stability, smoothness and other performance aspects. Utility Model Content

[0004] Based on this, it is necessary to provide a connection structure, a subframe and a vehicle that can improve the NVH performance of the entire vehicle.

[0005] A connecting structure for connecting a subframe and a vehicle body, the connecting structure comprising:

[0006] A first body connected to the subframe;

[0007] A second body connected to the vehicle body, wherein the second body is connected to the first body via a connecting member;

[0008] A first vibration isolator, used for isolating vibration between the second body and the first body;

[0009] A second vibration isolator, provided on the second body, for isolating vibration between the second body and the vehicle body;

[0010] An installation area, used for installing a first vibration isolation member;

[0011] Wherein, a first positioning cavity is disposed on the first body, and a second positioning cavity is disposed on the second body, and the first positioning cavity and the second positioning cavity are surrounded to form an installation area.

[0012] In one embodiment, the first vibration isolating member is provided with a through hole for the connecting member to pass through.

[0013] In one embodiment, the connection structure further includes a sleeve, and a sleeve area is formed between the outer wall of the connection member and the inner wall of the through hole, and the sleeve is assembled in the sleeve area.

[0014] In one of the embodiments, a first cone surface is provided on a side of the first vibration isolating member close to the first positioning cavity, and a first mounting cone surface matching with the first cone surface is provided on the first positioning cavity.

[0015] In one embodiment, a second conical surface is provided on a side of the first vibration isolating member close to the second positioning cavity, and a second mounting conical surface matching the second conical surface is provided on the second positioning cavity.

[0016] In one embodiment, the first vibration isolating member includes a first convex portion and a second convex portion that are disposed opposite to each other, the first convex portion is assembled in the first positioning cavity, and the second convex portion is assembled in the second positioning cavity.

[0017] In one embodiment, an opening groove is provided on one side of the first body close to the second body, an edge of the opening groove has an extension portion extending away from the edge, and an inner wall of the opening groove and an inner wall of the extension portion surround and form the first positioning cavity.

[0018] In one embodiment, the number of the connecting members is at least two, and the two connecting members are arranged along the height direction of the second body.

[0019] In one embodiment, the second vibration isolation member includes an inner member, an outer member and a flexible member, the inner member has a connection hole penetrating the inner member, the outer member is sleeved outside the inner member, and there is a gap between the inner member and the outer member, and the flexible member is installed in the gap; the second body is provided with a mounting opening, and the outer member is installed in the mounting opening.

[0020] The present application also provides a sub-frame, comprising a frame body and a connection structure as described in any one of the above embodiments, wherein the connection structure is used to connect the frame body and a vehicle body.

[0021] The present application also provides a car, which adopts the connection structure described in any one of the above embodiments.

[0022] Compared with the prior art, the first vibration isolator in the present application realizes vibration isolation between the first body and the second body, and realizes decoupling in the Y direction; the second vibration isolator realizes vibration isolation between the second body and the vehicle body, and realizes decoupling in the Z direction, realizing two-level vibration isolation and decoupling in the Y and Z directions. Secondly, through the setting of the installation area, there are more options for the size and shape of the second vibration isolator. Compared with the bushing structure that is only sleeved at the connection, it can leave more range of movement for the first body and the second body, meet the good decoupling in the Y and Z directions, and have a large adjustment and optimization space, which greatly improves the vibration isolation effect, improves the NVH performance of the whole vehicle, and balances the NVH, handling stability, smoothness and other performance aspects;

[0023] Furthermore, by providing the first positioning cavity and the second positioning cavity, positioning and matching among the first body, the second body and the first vibration isolation member are achieved, ensuring that vibrations of the first body and the second body in each direction can be transmitted to the first vibration isolation member, thereby improving the vibration isolation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 This is a schematic diagram of the connection structure provided in this application.

[0026] Figure 2 This is an exploded schematic diagram of the connection structure provided in this application.

[0027] Figure 3 This is a schematic structural diagram of the first vibration isolation member provided in this application.

[0028] Figure 4 This is a schematic diagram of the structure of the first entity provided in this application.

[0029] Figure 5 This is a schematic diagram of the structure of the second entity provided in this application.

[0030] Figure 6 The structure of the second vibration isolation member provided in this application is shown in FIG. Figure 1 .

[0031] Figure 7 The structure of the second vibration isolation member provided in this application is shown in FIG. Figure 2 .

[0032] Figure 8 A schematic structural diagram of the subframe provided for this application.

[0033] Figure numerals: 10, first body; 11, first positioning cavity; 111, first mounting cone; 12, extension; 13, screw hole; 20, second body; 21, second positioning cavity; 211, second mounting cone; 22, opening; 23, mounting port; 30, first vibration isolation member; 31, first protrusion; 311, first cone; 32, second protrusion; 321, second cone; 33, through hole; 40, connector; 50, kit; 60, second vibration isolation member; 61, inner member; 611, connecting hole; 62, outer member; 63, flexible member; 100, connecting structure; 200, frame body. DETAILED DESCRIPTION

[0034] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0035] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may also be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0036] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0037] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediate medium. Moreover, a first feature being “above”, “above” or “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below” or “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0038] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more related listed items.

[0039] See also Figures 1 to 7The present application provides a connection structure for connecting a subframe and a vehicle body, wherein the connection structure 100 includes a first body 10, a second body 20, a first vibration isolator 30, a second vibration isolator 60, and an installation area, wherein the first body 10 is connected to the subframe, the second body 20 is connected to the vehicle body, and the second body 20 is connected to the first body 10 through a connection member 40. The first vibration isolator 30 is used for vibration isolation between the second body 20 and the first body 10. The second vibration isolator 60 is provided on the second body 20 and is used for vibration isolation between the second body 20 and the vehicle body. The installation area is used to install the first vibration isolator 30. A first positioning cavity 11 is provided on the first body 10, and a second positioning cavity 21 is provided on the second body 20. The first positioning cavity 11 and the second positioning cavity 21 are surrounded to form an installation area. Of course, in other embodiments, a positioning cavity may be provided only on the first body 10 to form an installation area, or a positioning cavity may be provided only on the second body 20 to form an installation area.

[0040] When the car is running, the vibration isolation in the Y direction, that is, the vibration isolation between the first body 10 and the second body 20, is achieved by the first vibration isolation member 30. The vibration isolation in the Z direction, that is, the vibration isolation between the second body 20 and the vehicle body, is achieved by the second vibration isolation member 60.

[0041] In one embodiment, see Figure 3 The first vibration isolator 30 is a flexible structure. A flexible structure refers to a structure made of materials such as rubber and EVA resin, which is elastic and can effectively isolate and reduce vibration. The first vibration isolator 30 is assembled in the installation area, that is, a part of the first vibration isolator 30 is placed in the first positioning cavity 11, and the other part is placed in the second positioning cavity 21. The first positioning cavity 11 and the second positioning cavity 21 are respectively positioned and matched with the first vibration isolator 30. When the first body 10 vibrates in various directions relative to the first vibration isolator 30, the vibration can be transmitted to the first vibration isolator 30 through the inner wall of the first positioning cavity 11. The first vibration isolator 30 absorbs these vibrations through the deformation of the first vibration isolator 30 and will not be transmitted to the second body 20. Similarly, when the second body 20 vibrates in various directions relative to the first vibration isolator 30, the vibration can be transmitted to the first vibration isolator 30 through the inner wall of the second positioning cavity 21. The first vibration isolator 30 absorbs these vibrations through the deformation of the first vibration isolator 30 and will not be transmitted to the first body 10. The positioning and coordination among the first body 10 , the second body 20 , and the first vibration isolating member 30 is achieved, ensuring that the vibrations of the first body 10 and the second body 20 in all directions will not affect each other, thereby improving the vibration isolation effect.

[0042] In one embodiment, a first cone surface 311 is provided on the side of the first vibration isolator 30 close to the first positioning cavity 11. The first cone surface 311 can be set as an inclined surface, an arc surface, etc. In this embodiment, the first cone surface 311 is set as an inclined surface. A first installation cone surface 111 matching with the first cone surface 311 is provided on the first positioning cavity 11. The first installation cone surface 111 can be set as an inclined surface, an arc surface, etc. In this embodiment, the first installation cone surface 111 is set as an inclined surface, and the curvature is set to be the same as the curvature of the first cone surface 311. When the first vibration isolator 30 is installed in the installation area, the first cone surface 311 and the first installation cone surface 111 abut against each other. The setting of the cone surface makes the first vibration isolator 30 present a slightly conical structure, so that it is more convenient to insert into the positioning cavity during installation, and the assembly is simple. The cone surfaces abut against each other more closely, the vibration transmission is better, and the vibration isolation effect is better.

[0043] In one embodiment, a second conical surface 321 is provided on the side of the first vibration isolator 30 close to the second positioning cavity 21. The second conical surface 321 can be set as an inclined surface, a curved surface, etc. In this embodiment, the second conical surface 321 is set as an inclined surface. A second mounting conical surface 211 matching with the second conical surface 321 is provided on the second positioning cavity 21. The second mounting conical surface 211 can be set as an inclined surface, a curved surface, etc. In this embodiment, the second mounting conical surface 211 is set as an inclined surface, and the curvature is set to be the same as the curvature of the second conical surface 321. When the first vibration isolator 30 is installed in the installation area, the second conical surface 321 and the second mounting conical surface 211 abut against each other. The setting of the conical surface makes the first vibration isolator 30 present a slightly conical structure, so that it is more convenient to insert into the positioning cavity during installation, and the assembly is simple. The conical surfaces abut against each other more closely, the vibration transmission is better, and the vibration isolation effect is better.

[0044] In one embodiment, the first vibration isolator 30 includes a first convex portion 31 and a second convex portion 32, the first convex portion 31 and the second convex portion 32 are arranged opposite to each other, and the projection area of ​​the second convex portion 32 is larger than the projection area of ​​the first convex portion 31. During installation, the first convex portion 31 is assembled in the first positioning cavity 11, and the second convex portion 32 is assembled in the second positioning cavity 21. In one embodiment, the first conical surface 311 mentioned above is arranged on the first convex portion 31, and the second conical surface 321 is arranged on the first convex portion 31.

[0045] In one embodiment, see Figure 4 , corresponding to the height direction Z of the first body 10 , the lower part of the first body 10 is connected to the sub-frame, and the first positioning cavity 11 is arranged on the upper side wall of the first body 10 .

[0046] In one embodiment, an open groove is provided on one side of the upper part of the first body 10 close to the second body 20, and an extension portion 12 extending away from the edge is provided at the edge of the open groove, and a first positioning cavity 11 is formed by the inner wall of the open groove and the inner wall of the extension portion 12. The presence of the extension portion 12 increases the limiting area between the first positioning cavity 11 and the first vibration isolation member 30, further improving the vibration transmission between the two and improving the vibration isolation effect. Of course, in other embodiments, the first positioning cavity 11 can also be formed in other forms, such as only an open groove, only formed by the extension portion 12, etc.

[0047] In one embodiment, see Figure 5 , corresponding to the height direction Z of the second body 20 , the lower part of the second body 20 is connected to the first body 10 through the connecting member 40 , and the upper part is connected to the vehicle body through the second vibration isolator 60 , and the second positioning cavity 21 is arranged on the lower side wall of the second body 20 .

[0048] In one embodiment, the second body 20 is provided with an open groove on one side close to the first body 10, and the open groove forms the above-mentioned second positioning cavity 21. Of course, it is not limited thereto, and an extension portion 12 may also extend from the open groove, and the second positioning portion may also be formed by surrounding the open groove and the extension portion 12.

[0049] In one embodiment, the connecting member 40 can be set to one, two, three, etc. In this embodiment, it is set to two, and the two connecting members 40 are arranged along the height direction Z of the second body 20 to better fix the first vibration isolation member 30 in the installation area. The connecting member 40 can be set to a rivet, a bolt, etc. In this embodiment, it is set to a bolt.

[0050] In one embodiment, a screw hole 13 is provided on the first body 10 at a position corresponding to the first positioning cavity 11 along the thickness direction Y of the first body 10, an opening 22 is provided on the second body 20 at a position corresponding to the second positioning cavity 21 along the thickness direction Y of the second body 20, a through hole 33 is provided on the first vibration isolation member 30, and the connecting member 40 passes through the opening 22 on the second body 20 and the through hole 33 on the first vibration isolation member 30, and then penetrates into the screw hole 13 on the first body 10 and is screwed to the screw hole 13.

[0051] In one embodiment, the connection structure 100 further includes a set 50, the diameter of the connection member 40 is smaller than the diameter of the through hole 33, and thus there is a certain gap between the outer wall of the connection member 40 and the inner wall of the through hole 33, that is, a set 50 area is formed, and the set 50 is assembled in the set 50 area. Further decoupling is achieved in the Y direction, and both the first vibration isolator 30 and the set 50 play a role in vibration isolation, and the Y direction is further divided into two levels of vibration isolation, thereby enhancing the vibration isolation effect and improving the NVH performance of the vehicle.

[0052] In one embodiment, the kit 50 is configured as a flexible structure, which is made of materials such as rubber, EVA resin, etc., has elasticity, and can effectively isolate and reduce vibration.

[0053] In one embodiment, see Figure 6-Figure 7 The second vibration isolation member 60 includes an inner member 61, an outer member 62 and a flexible member 63. The outer member 62 is sleeved outside the inner member 61, and there is a gap between the inner member 61 and the outer member 62. The flexible member 63 is installed in the gap. The flexible member 63 is a flexible structure and can be made of materials such as rubber and resin. The second body 20 is provided with a mounting opening 23. The outer member 62 is installed in the mounting opening 23. The mounting method can be snap-on, adhesive, interference fit, etc. Along the height direction Z of the inner member 61, the inner member 61 has a connecting hole 611 that penetrates the inner member 61. Bolts, screws, rivets, etc. can pass through the connecting hole 611 to connect to the vehicle body. Vibration isolation is achieved by buffering through the flexible member 63 between the outer member 62 and the inner member 61.

[0054] See also Figure 8 The present application also provides a sub-frame, including a frame body 200 and a connecting structure 100 according to any one of the above-mentioned embodiments, wherein the connecting structure is used to connect the frame body 200 and a vehicle body.

[0055] The present application also provides a car, which adopts the connection structure of any one of the above embodiments.

[0056] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0057] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of patent protection of the present application shall be subject to the attached claims.

Claims

1. A connection structure for connecting a subframe and a vehicle body, characterized in that: The connection structure comprises: A first body (10) is used to be connected to the sub-frame; A second body (20) is used to be connected to the vehicle body, and the second body (20) is connected to the first body (10) via a connecting member (40); A first vibration isolating member (30) used for isolating vibration between the second body (20) and the first body (10); A second vibration isolating member (60) is disposed on the second body (20) and is used for isolating vibration between the second body (20) and the vehicle body; An installation area, used for installing a first vibration isolation member (30); Wherein, a first positioning cavity (11) is provided on the first body (10), and a second positioning cavity (21) is provided on the second body (20), and the first positioning cavity (11) and the second positioning cavity (21) are surrounded to form the installation area.

2. The connection structure according to claim 1, characterized in that: The first vibration isolating member (30) is provided with a through hole (33), and one end of the connecting member (40) is penetrated by the through hole (33).

3. The connection structure according to claim 2, characterized in that: The connection structure further comprises a sleeve (50), wherein an area of ​​the sleeve (50) is formed between the outer wall of the connection member (40) and the inner wall of the through hole (33), and the sleeve (50) is assembled in the area of ​​the sleeve (50).

4. The connection structure according to claim 1, characterized in that: A first cone surface (311) is provided on a side of the first vibration isolating member (30) close to the first positioning cavity (11), and a first mounting cone surface (111) matching with the first cone surface (311) is provided on the first positioning cavity (11).

5. The connection structure according to claim 1, characterized in that: A second conical surface (321) is provided on a side of the first vibration isolating member (30) close to the second positioning cavity (21), and a second mounting conical surface (211) matching with the second conical surface (321) is provided on the second positioning cavity (21).

6. The connection structure according to claim 1, characterized in that: The first vibration isolating member (30) comprises a first convex portion (31) and a second convex portion (32) which are arranged opposite to each other; the first convex portion (31) is assembled in the first positioning cavity (11), and the second convex portion (32) is assembled in the second positioning cavity (21).

7. The connection structure according to claim 1, characterized in that: An opening groove is provided on one side of the first body (10) close to the second body (20), and an extension portion (12) is provided at the edge of the opening groove and extends away from the edge, and the inner wall of the opening groove and the inner wall of the extension portion (12) are arranged to form the first positioning cavity (11).

8. The connection structure according to claim 1, characterized in that: At least two of the connecting members (40) are provided, and the two connecting members (40) are arranged along the height direction of the second body (20).

9. The connection structure according to claim 1, characterized in that: The second vibration isolation member (60) comprises an inner member (61), an outer member (62) and a flexible member (63); along the height direction of the inner member (61), the inner member (61) is provided with a connection hole (611) penetrating the inner member (61); the outer member (62) is sleeved outside the inner member (61), and there is a gap between the inner member (61) and the outer member (62); the flexible member (63) is installed in the gap; the second body (20) is provided with a mounting opening (23), and the outer member (62) is installed in the mounting opening (23).

10. A subframe, characterized in that: It comprises a frame body (200) and a connecting structure (100) according to any one of claims 1 to 9, wherein the connecting structure is used to connect the frame body (200) and a vehicle body.

11. A car, characterized in that: The automobile adopts the connection structure (100) according to any one of claims 1 to 9.

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