Connecting structure for auxiliary frame and chassis protection plate

Abstract

The utility model discloses a connecting structure for an auxiliary frame and a chassis guard plate, which comprises a connecting support arranged between the auxiliary frame and the chassis guard plate, and the upper end of the connecting support is fixedly connected with the auxiliary frame. The lower end of the connecting support is fixedly connected with the chassis protection plate, and a lining structure used for absorbing movement displacement of the auxiliary frame is arranged at the connecting joint. The lining structure is additionally arranged on the chassis protection plate at the connecting joint of the auxiliary frame and the chassis protection plate, so that jumping and pulling of the auxiliary frame in the X direction and the Y direction are effectively absorbed, pulling of the chassis protection plate by the auxiliary frame in the X direction and the Y direction is reduced, and the risk that the chassis protection plate is torn due to pulling is avoided; meanwhile, due to the adoption of the lining structure, the stress area in the Z direction at the connecting node is also increased, so that the stress per unit area of the mounting point of the chassis guard plate is reduced when the auxiliary frame jumps.

Description

TECHNICAL FIELD

[0001] The utility model relates to a car body structure technical field, concretely relates to a connecting structure for auxiliary frame and chassis apron. BACKGROUND

[0002] Because the ground condition is complex and changeable, the automobile is easy to knock with external object and cause the chassis damage when driving, further still can cause the damage of transmission or engine, therefore the automobile chassis generally will set up chassis apron, and the chassis apron is the protective device designed according to different vehicle models, and its purpose is to protect the automobile chassis, prevents the automobile chassis from being damaged by contacting with external object.

[0003] The conventional chassis apron realizes the installation and fixation of chassis apron through the mode of opening hole and assembling nut, screw or push nail at the connection with the lower car body structure. But this mode is not applicable in some car body structures that have movement displacement during vehicle driving, for example, the auxiliary frame structure usually has bounce in X, Y and Z directions of the car body during vehicle driving, and the displacement amount is large (about 3-10 mm). The auxiliary frame structure is generally connected with the chassis apron by setting a connecting bracket. If the conventional installation mode is adopted, the installation node of the chassis apron and the connecting bracket will be fatigued for a long time, and there is a risk of tearing and failure of the chassis apron.

[0004] Therefore, it is necessary to improve the existing connecting structure of auxiliary frame and chassis apron to solve the above-mentioned defects. UTILITY MODEL CONTENTS

[0005] Therefore, the utility model provides a connecting structure for auxiliary frame and chassis apron, which adds a bushing structure on the chassis apron at the connecting node of the auxiliary frame and the chassis apron, effectively absorbs the bounce and pulling of the auxiliary frame in X and Y directions, reduces the pulling of the auxiliary frame on the chassis apron in these two directions, and avoids the risk of tearing of the chassis apron due to pulling. At the same time, the use of the bushing structure also increases the stress area in Z direction at the connecting node, thereby reducing the unit area stress of the chassis apron mounting point when the auxiliary frame bounces.

[0006] The utility model provides a connecting structure for auxiliary frame and chassis apron, which includes a connecting bracket arranged between the auxiliary frame and the chassis apron, the upper end of the connecting bracket is fixedly connected with the auxiliary frame, the lower end of the connecting bracket is fixedly connected with the chassis apron, and a bushing structure for absorbing the movement displacement of the auxiliary frame is arranged at the connecting node.

[0007] Further, the bushing structure includes an upper bushing pressing plate arranged on the upper surface of the chassis apron, a lower bushing pressing plate arranged on the lower surface of the chassis apron, and a clamping sleeve clamped with the upper bushing pressing plate and the lower bushing pressing plate, respectively.

[0008] Further, the top of the clamping sleeve is provided with a first clamping flange structure for clamping cooperation with the upper bushing pressing plate.

[0009] Further, the central hole of the upper bushing pressing plate is formed downwardly with a first clamping jaw structure for clamping cooperation with the first clamping flange structure.

[0010] Further, the bottom of the clamping sleeve has a flange portion, and the outer peripheral edge of the flange portion is formed with a second clamping flange structure.

[0011] Further, the lower bushing pressing plate is arranged between the flange portion and the lower surface of the chassis guard plate, and the outer peripheral edge of the lower bushing pressing plate is formed with a second clamping jaw structure for clamping cooperation with the second clamping flange structure.

[0012] Further, the upper bushing pressing plate and the lower bushing pressing plate are integrally injection molded.

[0013] Further, the clamping sleeve is integrally stamped and formed.

[0014] Further, the relative displacement gap distance between the bushing structure and the chassis guard plate in the horizontal plane is greater than the movement displacement amount of the auxiliary frame in the horizontal plane.

[0015] Further, the utility model also comprises a bolt assembly arranged at the connection between the connecting support and the chassis guard plate, and the bolt assembly is used for connecting the connecting support, the chassis guard plate and the bushing structure to form an entirety.

[0016] The utility model discloses the beneficial effects are: the utility model discloses the bushing structure is additionally arranged on the chassis guard plate at the connecting joint of auxiliary frame and chassis guard plate, effectively absorbs the X and Y auxiliary frame jump and pull, reduces the pull of auxiliary frame to chassis guard plate in these 2 directions, avoids the risk that chassis guard plate is pulled and tears, and through the use of bushing structure, increases the stress area of connecting joint Z direction, thereby reducing the chassis guard plate mounting point unit area stress when auxiliary frame jumps, and simultaneously because the bushing structure adopts elastic steel material, when receiving the impact, has good deformation resilience, can also reduce the impact to chassis guard plate, prolongs the effective service life of chassis guard plate. BRIEF DESCRIPTION OF DRAWINGS

[0017] The utility model will be further described in connection with the drawings and examples:

[0018] Figure 1 It is structure schematic drawing for the connecting structure of auxiliary frame and chassis guard plate in the utility model;

[0019] Figure 2The utility model discloses a structure sectional view for the connecting structure of auxiliary frame and chassis fender.

[0020] Figure 3 For Figure 2 The enlarged schematic view;

[0021] Figure 4 The utility model discloses a structure schematic drawing for the upper bushing pressing plate in the utility model;

[0022] Figure 5 The utility model discloses a structure schematic drawing for the lower bushing pressing plate in the utility model;

[0023] Figure 6 The utility model discloses a structure schematic drawing for the clamping sleeve in the utility model;

[0024] Among them, the sign is: 1 - auxiliary frame;2 - chassis fender;3 - connecting support;4 - upper bushing pressing plate;5 - lower bushing pressing plate;6 - clamping sleeve;7 - bolt assembly;401 - first claw structure;501 - second claw structure;601 - first clamping flange structure;602 - flange portion;603 - second clamping flange structure. Specific implementation

[0025] As shown in the figure, the utility model provides a connecting structure for auxiliary frame and chassis fender, including the connecting support 3 of setting between auxiliary frame 1 and chassis fender 2, the upper end of connecting support 3 with auxiliary frame 1 fixed connection, the lower end of connecting support 3 with chassis fender 2 fixed connection and the connecting node is provided with the bushing structure for absorbing the motion displacement of auxiliary frame 1, wherein connecting support 3 is mainly used to form the connection of auxiliary frame 1 and chassis fender 2, to realize the connection between chassis fender 2 and vehicle body structure, and the bushing structure is provided at the connecting node of connecting support 3 and chassis fender 2, and the bushing structure is mainly used to absorb the motion displacement of auxiliary frame 1, wherein the motion displacement of auxiliary frame 1 includes the motion displacement in the length direction of vehicle body and the width direction of vehicle body on the horizontal plane and the motion displacement in the height direction of vehicle body on the vertical direction, by adding the bushing structure on the chassis fender 2 at the connecting node of auxiliary frame 1 and chassis fender 2, effectively absorb the bounce and pull of auxiliary frame 1 in the length direction of vehicle body and the width direction of vehicle body, reduce the pull of auxiliary frame 1 to chassis fender 2 in the two directions, and avoid the risk of tearing of chassis fender 2 by pulling, and by using the bushing structure, the stress area in the height direction of vehicle body at the connecting node is increased, thereby reducing the unit area stress of chassis fender 2 mounting point when auxiliary frame 1 bounces.

[0026] In the embodiment, the bushing structure includes the upper bushing pressing plate 4 arranged on the upper surface of the chassis fender 2, the lower bushing pressing plate 5 arranged on the lower surface of the chassis fender 2, and the clamping sleeve 6 clamped with the upper bushing pressing plate 4 and the lower bushing pressing plate 5 respectively,Figure 2 As shown, the bushing structure is mainly composed of the upper bushing pressing plate 4, the lower bushing pressing plate 5 and the clamping sleeve 6, wherein the upper bushing pressing plate 4 is arranged on the upper surface of the chassis guard plate 2 at the connecting joint, the lower bushing pressing plate 5 is arranged on the lower surface of the chassis guard plate 2 at the connecting joint, the clamping sleeve 6 is used to connect the upper bushing pressing plate 4 and the lower bushing pressing plate 5 together, and the connecting bracket 3 is arranged at the upper surface of the upper bushing pressing plate 4; by clamping and connecting the upper bushing pressing plate 4 and the lower bushing pressing plate 5 with the clamping sleeve 6 respectively, it is beneficial to the assembly and disassembly of the bushing structure at the connecting joint of the chassis guard plate 2, and at the same time, the bushing structure replaces the direct installation and fixation of the chassis guard plate 2 and the connecting bracket 3, thereby avoiding the direct movement and pulling of the subframe 1 to the chassis guard plate 2.

[0027] In the embodiment, the bottom outer periphery of the clamping sleeve 6 has a flange part 602, and the top of the clamping sleeve 6 is provided with a first clamping flange structure 601 for clamping and matching with the upper bushing pressing plate 4; the outer periphery edge of the flange part 602 is formed with a second clamping flange structure 603; the clamping sleeve 6 is made by one-piece stamping forming; in combination with Figure 2 and Figure 5 As shown, the clamping sleeve 6 is a sleeve structure made by one-piece stamping forming of an elastic steel plate and provided with a flange part 602 at the bottom, wherein the elastic steel plate material includes but is not limited to stainless steel, high-elasticity steel and the like, such as SAE 1050BS (surface galvanized aluminum), and the clamping sleeve 6 is made of metal material mainly considering that a certain rigidity is needed in the body height direction of the bushing structure to ensure the stable connection and support with the connecting bracket 3, and at the same time, good deformation and rebound performance is needed when receiving impact, which can also reduce the impact on the guard plate, and the corrosion resistance of the product is also considered to prolong the effective service life of the guard plate; and the clamping sleeve 6 is made by drawing forming of an elastic steel plate, and the first clamping flange structure 601 and the second clamping flange structure 603 are respectively drawn formed at the top of the clamping sleeve 6 and the outer periphery edge of the flange part 602, the first clamping flange structure 601 is mainly used for clamping and matching with the upper bushing pressing plate 4, and the second clamping flange structure 603 is mainly used for clamping and matching with the lower bushing pressing plate 5.

[0028] In the embodiment, the center hole of the upper bushing pressing plate 4 is downwardly formed with a first clamping jaw structure 401 for clamping and matching with the first clamping flange structure 601; in combination with Figure 2 and Figure 3As shown, the bottom plate 2 is provided with a connecting hole at the connecting joint, wherein the hole diameter of the connecting hole is greater than the pipe diameter of the clamping sleeve 6 and smaller than the diameters of the upper and lower bushing pressing plates 4 and 5; since the upper bushing pressing plate 4 is arranged on the upper surface of the bottom plate 2, and the first clamping flange structure 601 of the clamping sleeve 6 is clamped with the upper bushing pressing plate 4 after passing through the connecting hole, a first clamping jaw structure 401 is formed downwardly in the center hole of the upper bushing pressing plate 4 to be clamped with the first clamping flange structure 601.

[0029] In the embodiment, the lower bushing pressing plate 5 is arranged between the flange portion 602 and the lower surface of the bottom plate 2, and the outer peripheral edge of the lower bushing pressing plate 5 is formed with a second clamping jaw structure 501 for clamping with the second clamping flange structure 603; in combination with Figure 2 and Figure 4 As shown, since the lower bushing pressing plate 5 is arranged on the lower surface of the bottom plate 2 and mainly clamped with the second clamping flange structure 603 on the flange portion 602 of the clamping sleeve 6, a second clamping jaw structure 501 is formed downwardly on the outer peripheral edge of the lower bushing pressing plate 5 to be clamped with the second clamping flange structure 603; and a through hole is further arranged on the lower bushing pressing plate 5 for passing through the first clamping flange structure 601 of the clamping sleeve 6 during assembly, wherein the hole diameter of the through hole is as large as possible to reduce the overall weight of the lower bushing pressing plate 5 under the premise of passing through the first clamping flange structure 601 of the clamping sleeve 6 during assembly, but the distance between the through hole wall and the outer wall of the lower bushing pressing plate 5 in the radial direction needs to be greater than the movement displacement amount of the auxiliary frame 1 in the horizontal plane.

[0030] In the embodiment, the upper bushing pressing plate 4 and the lower bushing pressing plate 5 are both integrally injection molded; wherein the upper bushing pressing plate 4 and the lower bushing pressing plate 5 are integrally injection molded by using plastic materials such as resin, alloy resin, etc., such as POM, so that the upper bushing pressing plate 4 and the lower bushing pressing plate 5 have the friction self-lubricating property and prevent the friction noise between the bottom plate 2 and the connecting bracket 3 by using plastic materials for the components in contact with the bottom plate 2.

[0031] In the embodiment, the relative displacement gap distance between the bushing structure and the bottom plate 2 in the horizontal plane is greater than the movement displacement amount of the auxiliary frame 1 in the horizontal plane; in combination with Figure 3As shown, the relative displacement gap distance between the bushing structure and the chassis guard 2 in the horizontal plane is L (i.e. the distance between the wall of the chassis guard 2 connecting hole and the outer wall of the first jaw structure 401 of the upper bushing pressing plate 4), in order to ensure that the bushing structure can completely absorb the movement displacement amount of the subframe 1 in the horizontal plane, therefore the relative displacement gap distance L between the bushing structure and the chassis guard 2 in the horizontal plane needs to be greater than the movement displacement amount of the subframe 1 in the horizontal plane, wherein the movement displacement amount of the subframe 1 in the horizontal plane is calculated by the designer in the design stage, which is a preset value, and the movement displacement amount can be calculated according to different vehicle models and different subframe 1 structures, and the specific value is determined according to the situation.

[0032] In the embodiment, the bolt assembly 7 is arranged at the connecting position of the connecting bracket 3 and the chassis guard 2, and is used to connect the connecting bracket 3, the chassis guard 2 and the bushing structure to form a whole; when the bushing structure is installed, the lower bushing pressing plate 5 is first clamped at the bottom of the clamping sleeve 6 to form a combined piece, then the upper end of the combined piece is passed through the connecting hole at the connecting joint of the chassis guard 2 from bottom to top, then the upper bushing pressing plate 4 is clamped and assembled with the combined piece from top to bottom, and finally the bolt assembly 7 is used to realize the fixed connection with the connecting bracket 3.

[0033] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present application but not limit the present application, although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the purpose and scope of the present application, and all of them should be covered in the scope of the claims of the present application.

Claims

1. A connecting structure for a subframe and a chassis apron, characterized by: The connecting bracket is fixedly connected with the auxiliary frame at the upper end and fixedly connected with the chassis apron at the lower end, and a bushing structure for absorbing the movement displacement of the auxiliary frame is arranged at the connecting joint.

2. The connecting structure for a subframe and a chassis apron according to claim 1, characterized by: The bushing structure comprises an upper bushing pressing plate arranged on the upper surface of the chassis apron, a lower bushing pressing plate arranged on the lower surface of the chassis apron, and a clamping sleeve clamped with the upper bushing pressing plate and the lower bushing pressing plate respectively.

3. The connecting structure for a subframe and a chassis apron according to claim 2, characterized by: The top of the clamping sleeve is provided with a first clamping flange structure for clamping cooperation with the upper bushing pressing plate.

4. The connecting structure for a subframe and a chassis apron according to claim 3, characterized by: The central hole of the upper bushing pressing plate is downwardly formed with a first clamping jaw structure for clamping cooperation with the first clamping flange structure.

5. The connecting structure for a subframe and a chassis apron according to claim 3, characterized by: The bottom of the clamping sleeve has a flange portion, and the outer peripheral edge of the flange portion is formed with a second clamping flange structure.

6. The connecting structure for a subframe and a chassis apron according to claim 5, characterized by: The lower bushing pressing plate is arranged between the flange portion and the lower surface of the chassis apron, and the outer peripheral edge of the lower bushing pressing plate is formed with a second clamping jaw structure for clamping cooperation with the second clamping flange structure.

7. The connecting structure for a subframe and a chassis apron according to claim 2, characterized by: The upper bushing pressing plate and the lower bushing pressing plate are integrally injection molded.

8. The connecting structure for a subframe and a chassis apron according to claim 2, characterized by: The clamping sleeve is integrally stamped.

9. The connecting structure for a subframe and a chassis apron according to claim 1, characterized by: The relative displacement gap distance between the bushing structure and the chassis apron in the horizontal plane is greater than the movement displacement amount of the auxiliary frame in the horizontal plane.

10. The connecting structure for a subframe and a chassis apron according to claim 1, characterized by: A bolt assembly arranged at the connecting position of the connecting bracket and the chassis apron is further included, and the bolt assembly is used to connect the connecting bracket, the chassis apron and the bushing structure to form an integral whole.

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