Rear overhang spiral spring mounting structure and automobile

Abstract

The utility model provides a rear overhang spiral spring mounting structure and an automobile, and belongs to the field of automobile structures. The structure comprises two rear girders which are arranged in the length direction of a vehicle and are in bilateral symmetry, and a cross beam is arranged between the two rear girders; the two rear spring upper seat mounting seats are respectively arranged at the joints of the cross beam and the rear girder and are fixed at the bottom ends of the rear girder and the cross beam, rear buffer block brackets are fixed at the lower ends of the rear spring upper seat mounting seats, and rear suspension spiral springs are sleeved on the rear buffer block brackets. According to the rear suspension spiral spring installation structure, the rear suspension spiral spring moves towards one side of the cross beam, force exerted on the rear spring upper seat installation seat in the running process of a vehicle can be smoothly transmitted to the far end of the upper portion of the vehicle body in the direction parallel to the center line of the rear suspension spiral spring, stress concentration cannot be generated in a local area, and the service life of the vehicle is prolonged. The problems that in the prior art, an automobile body is prone to cracking, road noise is large, and the dynamic stiffness of a suspension hard point is poor are solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of vehicle structure, concretely relates to a rear suspension coil spring mounting structure and car. BACKGROUND

[0002] The automobile rear suspension coil spring is connected with the vehicle body through the rear spring upper vibration isolation pad, in the vehicle driving process, the rear suspension will repeatedly impact the vehicle body, the vehicle body mounting structure needs to have enough strength to bear the load, and the force at the connecting point is transmitted to the far end through a smooth path to reduce stress concentration. Figure 1 、 Figure 2 As shown in the traditional vehicle body rear suspension spring upper seat mounting seat fixed on the rear spring seat reinforcement plate lower end fixed on the rear beam and the rear beam outer wall, so that the whole rear suspension coil spring is set on the outer side of the vehicle body, so that the center of the rear suspension coil spring and the center of the vehicle body beam are not in the same straight line, and there is a certain distance L, the structure cannot smoothly transmit the force of the rear suspension coil spring to the far end through the rear spring upper vibration isolation pad, and is prone to problems such as vehicle body cracking, large road noise, poor dynamic stiffness of suspension hard point, etc. SUMMARY

[0003] The utility model discloses a rear suspension coil spring mounting structure and car to solve the problems in the prior art, such as vehicle body cracking, large road noise, poor dynamic stiffness of suspension hard point, etc.

[0004] The utility model discloses the following technical scheme:

[0005] The utility model discloses a first aspect, provide a kind of rear suspension coil spring mounting structure, comprising:

[0006] Two rear beams are arranged along the length direction of vehicle and symmetrical left and right, and a cross beam is arranged between the two rear beams;

[0007] Two rear spring upper seat mounting seats are respectively arranged at the connection of the cross beam and the rear beam and fixed to the bottom end of the rear beam and the cross beam, a rear bumper block support is fixed to the lower end of the rear spring upper seat mounting seat, and a rear suspension coil spring is sleeved on the rear bumper block support.

[0008] The utility model further improves in that:

[0009] The two ends of the rear spring upper seat mounting seat extend to the inner side and the outer side of the rear beam respectively, and the part of the rear spring upper seat mounting seat extending to the inner side of the rear beam is fixed to the lower end of the cross beam.

[0010] The utility model further improves in that:

[0011] The section of the rear beam is in a "U" shape structure;

[0012] The inner side of the "U" shaped structure of the rear beam is connected with the lateral beam through a rear spring seat inner reinforcing plate;

[0013] The part of the rear spring upper seat mounting seat extending to the outer side of the rear beam is connected with the outer side of the "U" shaped structure of the rear beam through a rear spring seat reinforcing plate.

[0014] The further improvement of the utility model lies in that:

[0015] The section of the rear spring seat reinforcing plate is in an "L" shape;

[0016] The vertical part of the "L" shape of the rear spring seat reinforcing plate is connected with the outer side of the rear beam, and the bottom part of the "L" shape is connected with the part of the rear spring upper seat mounting seat extending to the outer side of the rear beam.

[0017] The further improvement of the utility model lies in that:

[0018] The section of the rear spring seat inner reinforcing plate is in an "L" shape;

[0019] The vertical part of the "L" shape of the rear spring seat inner reinforcing plate is connected with the inner side of the rear beam, and the bottom part of the "L" shape is connected with the lateral beam.

[0020] The further improvement of the utility model lies in that:

[0021] The rear buffer block support is in a bowl shape structure, the edge of the opening end of the rear buffer block support is provided with an outward flanging, and the flanging is attached to and connected with the lower end surface of the rear spring upper seat mounting seat.

[0022] The further improvement of the utility model lies in that:

[0023] The rear spring upper shock pad is arranged between the rear buffer block support and the rear suspension coil spring, and the rear spring upper shock pad is attached to the rear buffer support.

[0024] The further improvement of the utility model lies in that:

[0025] The rear beam is provided with a rear beam reinforcing plate;

[0026] The rear beam reinforcing plate is attached to the bottom surface of the rear beam.

[0027] The further improvement of the utility model lies in that:

[0028] The rear beam is further provided with a rear beam rear reinforcing plate, and the rear beam rear reinforcing plate is located above the rear beam reinforcing plate;

[0029] The rear beam rear reinforcing plate forms a closed structure with the rear beam and the rear beam reinforcing plate.

[0030] The second aspect of the utility model provides a car, including rear suspension coil spring mounting structure of above-mentioned.

[0031] Compared with the prior art, the utility model has the advantages that:

[0032] In the utility model, the rear spring upper seat mounting seat is fixed at the cross beam and the bottom end of the rear beam, so that the rear suspension coil spring moves to the side of the cross beam (i.e. the inner side of the vehicle body), and in the process of vehicle driving, the rear suspension coil spring exerts force on the rear spring upper seat mounting seat through the rear buffer block support, the force exerted on the rear spring upper seat mounting seat can be smoothly transmitted to the distal end of the upper part of the vehicle body in a direction parallel to the center line of the rear suspension coil spring, and stress concentration is not generated in the local area, thus solving the problems of cracking of the vehicle body, large road noise and poor dynamic stiffness of the suspension hard point in the prior art structure; meanwhile, the cross beam is connected to the left and right vehicle bodies, so that the force can be transmitted to the left and right vehicle bodies, and bending and other conditions caused by excessive force on a single side are avoided.

[0033] When the rear suspension coil spring mounting structure is applied to a vehicle, simulation analysis of the strength of the whole vehicle shows that there is no stress concentration problem, and there is no cracking problem in the structure durability road test of the real vehicle, the durability reliability of the vehicle body is improved, and the improvement effect of NVH is obvious, and the dynamic stiffness of the rear suspension is improved by 30%. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 It is a traditional vehicle body rear suspension coil spring mounting structure diagram;

[0035] Figure 2 It is Figure 1 A-A sectional view of figure 1;

[0036] Figure 3 It is a rear suspension coil spring mounting structure schematic diagram in the utility model;

[0037] Figure 4 It is Figure 3 A local enlarged view of figure 2;

[0038] Figure 5 It is a mounting structure schematic diagram of the rear spring seat reinforcing plate in the utility model;

[0039] Figure 6 It is a mounting structure schematic diagram of the rear spring seat inner reinforcing plate in the utility model;

[0040] Figure 7 It is a mounting structure schematic diagram of the rear buffer block support and the rear suspension coil spring in the utility model;

[0041] Figure 8 B-B sectional view of Fig. Figure 3

[0042] Figure 9 C-C sectional view of Fig. Figure 3

[0043] In the figure, 1, rear beam, 2, rear beam reinforcement plate, 3, rear spring upper seat mounting seat, 4, rear beam rear reinforcement plate, 5, rear spring seat reinforcement plate, 6, rear spring seat inner reinforcement plate, 7, cross beam, 8, rear buffer block support, 9, rear spring upper vibration isolation pad, 10, rear suspension coil spring. DETAILED DESCRIPTION

[0044] The utility model will be described in further detail below in combination with the drawings:

[0045] As shown in Fig. Figures 3-9 The utility model discloses an rear suspension coil spring mounting structure, comprising:

[0046] Two rear beams 1 are arranged along the length direction of vehicle and symmetrical left and right, and the cross beam 7 is arranged between the two rear beams;

[0047] Two rear spring upper seat mounting seats 3 are arranged at the connecting portion of the cross beam 7 and the rear beam 1 respectively and fixed to the bottom end of the cross beam and the rear beam, the rear buffer block support 8 is fixed to the lower end of the rear spring upper seat mounting seat 3, and the rear suspension coil spring 10 is sleeved on the rear buffer block support 8.

[0048] In the utility model, the rear spring upper seat mounting seat 3 is arranged at the connecting portion of the cross beam 7 and the rear beam 1 and fixed to the bottom end of the cross beam 7 and the rear beam 1, so that the rear suspension coil spring 10 moves to the side of the cross beam (that is, the inner side of the vehicle body), in the process of vehicle driving, the rear suspension coil spring 10 exerts force on the rear spring upper seat mounting seat 3 through the rear buffer block support 8, the force exerted on the rear spring upper seat mounting seat 3 can be smoothly transmitted to the far end of the upper part of the vehicle body along the direction parallel to the center line of the rear suspension coil spring 10, and stress concentration in the local area is avoided, so that the problems of body cracking, large road noise and poor dynamic stiffness of the suspension hard point in the prior art structure are solved, and the force can be transmitted to the left and right vehicle bodies through the cross beam 7, so that the bending of the single side due to excessive force is avoided.

[0049] ​​As a preferred embodiment of the utility model, the section of the rear beam 1 is in a "U" shape structure, the two ends of the rear spring upper seat mounting seat 3 respectively extend to the inner side and the outer side of the rear beam 1, wherein the part of the rear spring upper seat mounting seat 3 extending to the inner side of the rear beam 1 is fixed at the lower end of the cross beam 7, and the cross beam 7 is connected with the inner side of the "U" shaped structure of the rear beam 1 through the rear spring seat inner reinforcing plate 6; the part of the rear spring upper seat mounting seat 3 extending to the outer side of the rear beam 1 is connected with the outer side of the "U" shaped structure of the rear beam 1 through the rear spring seat reinforcing plate 5.

[0050] It should be noted that in the embodiment of the utility model, along the length direction of the vehicle, the opposite side of the two rear beams 1 is the inner side, and the side far away from each other is the outer side.

[0051] In the embodiment, the part of the spring upper seat mounting seat 3 connected with the rear beam 1, the rear spring seat reinforcing plate 5 and the cross beam 7 are welded together, and the part of the cross beam 7 connected with the rear spring seat inner reinforcing plate 6 are welded together.

[0052] As a preferred embodiment of the utility model, the section of the rear spring seat reinforcing plate 5 is in an "L" shape, the vertical face part of the "L" shape in the rear spring seat reinforcing plate 5 is connected with the outer side of the rear beam 1, and the bottom part of the "L" shape is connected with the part of the rear spring upper seat mounting seat 3 extending to the outer side of the rear beam 1, so that the rear spring seat reinforcing plate 5, the rear spring upper seat mounting seat 3 and the outer side of the rear beam 1 form a support structure with a triangular section, thereby increasing the strength of the vehicle body and improving the stability. Preferably, the edge of the rear spring seat reinforcing plate 5 is provided with an outward flanging structure. Preferably, the corresponding positions of the bottom part of the "L" shape in the rear spring seat reinforcing plate 5 and the part of the rear spring upper seat mounting seat 3 extending to the outer side of the rear beam 1 are provided with threaded holes, and the bolt passes through the threaded holes on the rear spring upper seat mounting seat 3 and the threaded holes on the rear spring seat reinforcing plate 5 from bottom to top in sequence, and is fastened through the mounting nut; further preferably, the mounting nut can be directly welded on the rear spring seat reinforcing plate 5, or can be integrally formed with the rear spring seat reinforcing plate 5.

[0053] As a preferred embodiment of the utility model, the section of the rear spring seat inner reinforcing plate 6 is "L" shape, the vertical surface part of the "L" shape in the rear spring seat inner reinforcing plate 6 is connected with the inner side surface of the rear beam 1, and the bottom surface part of the "L" shape is connected with the cross beam 7, so that the rear spring seat inner reinforcing plate 6, the rear spring upper seat mounting seat 3 and the inner side surface of the rear beam 1 form a support structure with triangular section, the strength of the vehicle body is increased, and the stability is improved. Preferably, the edge of the rear spring seat inner reinforcing plate 6 is provided with an outward flanging structure. Preferably, the corresponding positions of the bottom surface part of the "L" shape in the rear spring seat inner reinforcing plate 6, the cross beam 7 and the part of the rear spring upper seat mounting seat 3 extending to the inner side of the rear beam 1 are provided with threaded holes, a bolt passes through the threaded holes on the rear spring upper seat mounting seat 3, the threaded holes on the cross beam 7 and the threaded holes on the rear spring seat inner reinforcing plate 6 in sequence from bottom to top, and is fastened by a mounting nut; further preferably, the mounting nut can be directly welded on the rear spring seat inner reinforcing plate 6 or can be integrally formed with the rear spring seat inner reinforcing plate 6.

[0054] Preferably, the cross beam 7 is a beam structure with "U" shape section with the opening facing upward, and the bottom surface part of the "L" shape in the rear spring seat inner reinforcing plate 6 is attached to the bottom surface of the cross beam 7.

[0055] As a preferred embodiment of the utility model, the rear buffer block support 8 is a bowl-shaped structure, the edge of the opening end of the bowl-shaped structure is provided with an outward flanging, the flanging is attached to and connected with the lower end surface of the rear spring upper seat mounting seat 3. Preferably, the flanging of the rear buffer block support 8 is provided with a threaded hole, the position of the threaded hole corresponds to the position of the threaded hole provided on the rear spring upper mounting seat 2, a bolt passes through the threaded holes on the rear buffer block support 8, the threaded holes on the rear spring upper seat mounting seat 3, the threaded holes on the rear spring seat reinforcing plate 5 or the rear spring seat inner reinforcing plate 6 or the rear beam 1 in sequence, and is fastened by a mounting nut to connect the rear buffer block support 8 with the rear spring upper seat mounting seat 3, the rear spring seat reinforcing plate 5 or the rear spring seat inner reinforcing plate 6 or the rear beam 1. Preferably, the flanging of the rear buffer block support 8 is uniformly provided with a plurality of threaded holes in the circumferential direction, and further preferably, the threaded holes are at least 3.

[0056] As a preferred embodiment of the utility model, a rear spring upper shock pad 9 is arranged between the rear buffer block support 8 and the rear suspension coil spring 10, the rear spring upper shock pad 9 is attached to the rear buffer support 8 to play a role of shock absorption, and preferably, a soft shock isolation material such as rubber is selected.

[0057] As a preferred embodiment of the present utility model, the cross-section of the rear beam 1 is in a "U" shape. A rear beam reinforcement plate 2 is arranged inside the "U" shape of the rear beam 1. The rear beam reinforcement plate 2 is fitted to the bottom surface of the rear beam 1 to increase the strength of the bottom of the rear beam 1. Preferably, the length of the rear beam reinforcement plate 2 is less than or the same as the length of the rear beam. The cross-section of the rear beam reinforcement plate 2 is in a "U" shape or a "-" shape, etc. Preferably, the rear beam reinforcement plate 2 is welded to the rear beam 1, such as spot welding or CO₂ shielded welding can be used.

[0058] As a preferred embodiment of the present utility model, a rear beam rear reinforcement plate 4 is further arranged inside the "U" shape of the rear beam 1. The rear beam rear reinforcement plate 4 is located above the rear beam reinforcement plate 2 and has a certain distance from the rear beam reinforcement plate 2. The rear beam rear reinforcement plate 4, the rear beam 1 and the rear beam reinforcement plate 2 form a closed structure. The cross-section of this closed structure can be approximately triangular, quadrilateral, other polygonal or other closed shapes to increase the overall structural strength. For example, as Figure 4 shown, the rear beam rear reinforcement plate 4 is in a "U" shape with the opening facing downwards. Flanges are provided on the ends of the two vertical plates and are fixed on the rear beam rear reinforcement plate 2. At this time, the rear beam rear reinforcement plate 4, the rear beam 1 and the rear beam reinforcement plate 2 form a "mouth" shape structure, making the overall structure more stable.

[0059] Preferably, the rear beam 1, the rear beam reinforcement plate 2, the rear spring upper seat mounting seat 3, the rear beam rear reinforcement plate 4, the rear spring seat reinforcement plate 5, the rear spring seat inner reinforcement plate 6 and the cross beam 7 are made of steel or other metal materials.

[0060] In the present utility model, the rear spring upper seat mounting seat 3 is arranged at the connection between the cross beam 7 and the rear beam 1 and is fixed at the bottom ends of the cross beam 7 and the rear beam 1. This makes the rear suspension coil spring 10 move towards the cross beam side (that is, the inner side of the vehicle body). During the driving of the vehicle, the rear suspension coil spring 10 applies force to the rear spring upper seat mounting seat 3 through the rear spring upper vibration isolation pad 9 and the rear buffer block bracket 8. Since the rear spring upper seat mounting seat 3 is connected to the bottom of the rear beam 11, and a rear beam reinforcement plate 2 is provided at this position of the rear beam 1 to strengthen it. At the same time, the rear spring upper seat mounting seat 3, the rear beam 1, the rear spring seat reinforcement plate 5 or the rear spring seat inner reinforcement plate 6 form a triangular support structure. The force applied to the rear spring upper seat mounting seat 3 can be smoothly transmitted to the far end of the upper part of the vehicle body along the direction parallel to the center line of the rear suspension coil spring 10, and stress concentration will not occur in a local area. And, due to the local closed structure formed by the rear beam rear reinforcement plate 4 and the rear beam 1 above, it can well avoid the situation of overall crushing when受力. At the same time, since the cross beam 7 connects the left and right sides of the vehicle body, the force can be transmitted to the left and right sides of the vehicle body to avoid the situation of excessive unilateral force causing bending, etc.

[0061] The rear suspension spiral spring mounting structure is applied to an automobile, stress concentration problems of the automobile are found through simulation analysis of the strength of the automobile, no cracking problems are found in the road test of the actual vehicle structure, the durability reliability of the vehicle body is improved, and the NVH improvement effect is obvious, and the rear suspension dynamic stiffness is improved by 30%.

[0062] In the description of the utility model, it is necessary to explain that, unless there is definite stipulation and limitation, the term "connects", "connects" should be broad understanding, for example, can be fixed connection, also can be detachable connection, or integrally connects, can be mechanical connection, also can be electrical connection, can be directly connected, also can be indirectly connected through intermediate medium. For ordinary skilled in the art, the specific meaning of the above-mentioned term in the utility model can be understood according to specific circumstances.

[0063] In the description of the utility model, unless otherwise stated, the orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and is not indicative or suggestive of the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0064] The above technical scheme is only one embodiment of the utility model, for those skilled in the art, on the basis of the principle disclosed in the utility model, various types of improvements or deformations can be easily made, and are not limited to the technical scheme described in the above embodiment of the utility model, therefore, the foregoing description is only preferred, and does not have the meaning of limitation.

Claims

1. A rear suspension coil spring mounting structure characterized by: The application relates to a rear suspension coil spring mounting structure of a vehicle. Two rear beams are arranged along the length direction of the vehicle and are left-right symmetrical, and a cross beam is arranged between the two rear beams; Two rear spring upper seat mounting seats are arranged at the connecting position of the cross beam and the rear beam and are fixed to the bottom end of the rear beam and the cross beam, a rear buffer block support is fixed to the lower end of the rear spring upper seat mounting seat, and a rear suspension coil spring is sleeved on the rear buffer block support.

2. The rear suspension coil spring mounting structure according to claim 1, characterized by: The two ends of the rear spring upper seat mounting seat extend to the inner side and the outer side of the rear beam, and the part of the rear spring upper seat mounting seat extending to the inner side of the rear beam is fixed to the lower end of the cross beam.

3. The rear suspension coil spring mounting structure according to claim 2, characterized by: The cross section of the rear beam is in a "U" structure; The inner side of the "U" structure of the cross beam and the rear beam is connected through a rear spring seat inner reinforcing plate; The part of the rear spring upper seat mounting seat extending to the outer side of the rear beam is connected to the outer side of the "U" structure of the rear beam through a rear spring seat reinforcing plate.

4. The rear suspension coil spring mounting structure according to claim 3, characterized by: The cross section of the rear spring seat reinforcing plate is in an "L" structure; The vertical part of the "L" structure of the rear spring seat reinforcing plate is connected to the inner side of the rear beam, and the bottom part of the "L" structure is connected to the part of the rear spring upper seat mounting seat extending to the outer side of the rear beam.

5. The rear suspension coil spring mounting structure according to claim 3, characterized by: The cross section of the rear spring seat inner reinforcing plate is in an "L" structure; The vertical part of the "L" structure of the rear spring seat inner reinforcing plate is connected to the inner side of the rear beam, and the bottom part of the "L" structure is connected to the cross beam.

6. The rear suspension coil spring mounting structure according to claim 1, characterized by: The rear buffer block support is in a bowl structure, the edge of the open end of the rear buffer block support is provided with an outward flange, the flange is matched with and connected to the lower end surface of the rear spring upper seat mounting seat.

7. The rear suspension coil spring mounting structure according to claim 1, characterized by: A rear spring upper shock insulation pad is arranged between the rear buffer block support and the rear suspension coil spring, and the rear spring upper shock insulation pad is matched on the rear buffer block support.

8. The rear suspension coil spring mounting structure according to claim 1, characterized by: A rear beam reinforcing plate is arranged in the rear beam; The rear beam reinforcing plate is matched with the bottom surface of the rear beam.

9. The rear suspension coil spring mounting structure according to claim 8, characterized by: A rear beam rear reinforcing plate is further arranged in the rear beam, and the rear beam rear reinforcing plate is arranged above the rear beam reinforcing plate; The rear beam rear reinforcing plate, the rear beam and the rear beam reinforcing plate form a closed structure.

10. An automobile characterized by comprising: The application further relates to a vehicle comprising the rear suspension coil spring mounting structure.

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