Suspension structure for vehicle

Abstract

The utility model discloses a suspension structure of a vehicle, which comprises a suspension support which is connected to a frame of the vehicle through a connecting piece. The suspension bracket is provided with a first mounting part, and a shaft sleeve is arranged on the first mounting part; the shaft sleeve comprises a core shaft penetrating through the suspension support and an elastic body arranged on the core shaft in a sleeving mode. The frame is provided with a mounting groove matched with the first mounting part, the connecting piece penetrates through the mandrel and the frame so as to fix the mandrel on the frame, and the connecting position is located near a notch of the mounting groove; according to the suspension structure of the vehicle, the suspension support is directly and fixedly connected to the vehicle frame through the connecting piece, compared with the prior art that the suspension support is connected to an installation supporting lug of the vehicle frame through a bolt, the connection strength of the suspension support and the vehicle frame can be improved, and meanwhile the installation space needed by the suspension support can be reduced; the arrangement requirement of a vehicle with the rear wheel steering requirement is met, and the rear wheel steering device can adapt to various vehicle types.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a suspension structure of a vehicle. Background Art

[0002] The suspension bracket is an important force transmission component that fixes the powertrain on the car. Its main function is to support, isolate and attenuate the transmission of the vibration and noise of the powertrain into the car, limit the displacement of the powertrain under extreme working conditions, thereby ensuring good NVH performance in the car and improving the competitiveness of the whole vehicle. In order to reduce the transmission of the vibration and noise of the powertrain to the body structure, the existing powertrain suspension generally adopts a three-point suspension design, all of which are arranged on the rear subframe. Its structure usually includes three parts: left suspension component, right suspension component and front or rear suspension component. However, with the rise of rear-wheel steering technology, since the rear-wheel steering motor and steering tie rod are arranged on the front crossbeam of the rear subframe, the layout space of the rear motor front suspension component arranged at the front crossbeam of the rear subframe is further compressed, resulting in the original structure being unable to meet the requirements, and the NVH performance is reduced. At the same time, the rear motor front suspension component is generally fixedly connected to the subframe through multiple suspension brackets, and more parts are required.

[0003] Therefore, there is an urgent need to develop a vehicle suspension structure in which the number of parts required when the suspension bracket is connected to the subframe is greatly reduced compared to the existing technology. At the same time, the overall layout space can meet the needs of both models with rear-wheel steering and models without rear-wheel steering, thereby improving the commonality between different models. Summary of the invention

[0004] In view of this, the purpose of the utility model is to provide a suspension structure of a vehicle. Compared with the suspension bracket in the prior art, there is no need to set additional mounting ears on the subframe, thus saving parts. The layout space of the suspension bracket can simultaneously meet the needs of vehicles with and without rear-wheel steering, avoiding interference with other components.

[0005] The utility model provides a suspension structure for a vehicle, comprising a suspension bracket, wherein the suspension bracket is connected to a frame of the vehicle through a connecting piece;

[0006] The suspension bracket has a first mounting portion, and a shaft sleeve is provided on the first mounting portion;

[0007] The shaft sleeve includes a core shaft penetrating the suspension bracket, and an elastic body sleeved on the core shaft;

[0008] The frame has a mounting groove that cooperates with the first mounting portion, and the connecting piece passes through the core shaft and the frame to fix the core shaft on the frame, and the connection position is located near the notch of the mounting groove; the core shaft is directly connected to the frame of the vehicle, and there is no need to set mounting ears on the frame, which can reduce parts and save costs. At the same time, compared with the existing technology, the installation space required for the suspension bracket can be reduced, which meets the use needs of vehicles with rear-wheel steering requirements and can expand the scope of application of vehicle models.

[0009] Further, the mandrel extends along the Y direction of the vehicle, and the notch of the mounting groove faces the Z direction of the vehicle;

[0010] The core shaft spans the notch of the mounting groove, and both ends are fixedly connected to the frame via a connecting piece extending along the Z direction of the vehicle; the core shaft spans the notch of the mounting groove and is fixedly connected to the frame via the connecting piece, so that the core shaft directly bears torque during use, and can withstand greater torque than the prior art method of bearing torque via a screw rod and a mounting lug.

[0011] Further, the frame includes a sub-frame, and the suspension bracket also has a second mounting portion;

[0012] The first mounting portion is connected to the subframe, and the second mounting portion is connected to a powertrain of the vehicle.

[0013] Furthermore, the elastomer is a double-layer cylinder structure, the inner cylinder is connected to the outer cylinder by a number of vibration-damping supports distributed along the circumferential direction, and the inner wall of the outer cylinder is provided with a number of limit bumps facing the inner cylinder; the limit bumps can be provided to avoid abnormal noise in the first mounting part caused by the direct collision of the inner cylinder with the outer cylinder under certain extreme working conditions.

[0014] Furthermore, boss structures are provided on both sides of the installation groove; the boss structures are provided so that the sub-frame is designed with a variable cross-section at this location, which can improve the dynamic stiffness of the connection between the suspension bracket and the sub-frame.

[0015] Furthermore, the boss structure is provided with a mounting hole, and the connecting member passes through the mounting hole and fixes the mandrel to the sub-frame; the connecting member passes through the mounting hole to fix the mandrel to the sub-frame, which can further enhance the vibration isolation capability of the suspension bracket.

[0016] Furthermore, the cross-section of the inner cylinder is a prismatic structure, and the middle part of the core shaft is conformed to the inner cylinder; preferably, the inner cylinder is a square structure, and the inner cylinder is set as a square structure, and the core shaft is conformed to the square structure, which can prevent the inner cylinder from rotating around the core shaft, thereby increasing the contact force between the vibration damping support and the core shaft and reducing the risk of suspension failure.

[0017] Furthermore, the subframe includes a crossbeam, the mounting groove is arranged on the crossbeam, and the core shaft is approximately parallel to the crossbeam; thereby making the axis of the elastic body approximately parallel to the crossbeam, which can improve the vibration isolation effect.

[0018] Furthermore, the second mounting part is provided with a plurality of weight-reducing holes and reinforcing ribs; the first mounting part is provided with reinforcing ribs; the reinforcement ribs are provided to improve the dynamic stiffness of the first mounting part, and at the same time, the weight-reducing holes and reinforcing ribs are provided on the second mounting part, which can achieve lightweight structure while ensuring the structural strength of the second mounting part.

[0019] Beneficial effects of the utility model: The utility model provides a suspension structure for a vehicle, in which a suspension bracket is directly connected to a frame of the vehicle through a connecting piece. Compared with the prior art in which a suspension bracket is connected to a mounting ear on a sub-frame through bolts, the connection strength between the suspension bracket and the frame of the vehicle can be improved, while reducing the required parts and components, saving production costs, and reducing the installation space required for the suspension bracket, thereby meeting the layout requirements of vehicles with and without rear-wheel steering requirements, and can adapt to a variety of vehicle models. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0021] Figure 1 It is a schematic diagram of the structure of the utility model;

[0022] Figure 2 is a structural schematic diagram of a suspension bracket;

[0023] Figure 3 It is a schematic diagram of the structure of the suspension bracket when there is no mandrel;

[0024] Figure 4 is a schematic diagram of the structure of the mandrel;

[0025] Figure 5 This is a partial enlarged view of the subframe;

[0026] The above drawings contain the following reference numerals:

[0027] 1. Subframe; 101. Boss structure; 102. Mounting groove; 2. Suspension bracket; 201. First mounting portion; 2011. Mandrel; 20111. Connecting hole; 2012. Inner cylinder; 2013. Vibration-damping support; 2014. Position-limiting bumper; 2015. Reinforcing rib; 2016. Outer cylinder; 202. Second mounting portion; 2021. Reinforcing rib; 203. Connector. DETAILED DESCRIPTION

[0028] Figure 1 It is a structural schematic diagram of the utility model. Figure 2 is a schematic diagram of the structure of the suspension bracket. Figure 3 This is a schematic diagram of the structure of the suspension bracket when there is no mandrel. Figure 4 is a schematic diagram of the structure of the mandrel. Figure 5 This is a partial enlarged view of the subframe, such as Figure 1-5 As shown: a suspension structure of a vehicle of this embodiment includes a suspension bracket 2, and the suspension bracket 2 is connected to the frame of the vehicle through a connecting member 203; the connecting member 203 can be a structure such as a bolt, and the suspension bracket 2 is directly installed on the frame of the vehicle through the connecting member 203, which can improve the dynamic stiffness of the connection between the suspension bracket 2 and the frame;

[0029] The suspension bracket 2 has a first mounting portion 201, and a shaft sleeve is provided on the first mounting portion 201;

[0030] The shaft sleeve includes a core shaft 2011 penetrating the suspension bracket 2, and an elastic body sleeved on the core shaft 2011; the elastic body can improve the vibration isolation effect, and the elastic body is made of rubber material;

[0031] The frame has a mounting groove 102 that cooperates with the first mounting portion 201, and the connecting member 203 passes through the core shaft 2011 and the frame to fix the core shaft 2011 on the frame, and the connecting position is located near the notch of the mounting groove 102; there are two connecting members 203, and the two ends of the core shaft 2011 are connected to the frame accordingly. The first mounting portion 201 is arranged in the mounting groove 102, and the connecting position is located near the notch of the mounting groove 102, which can reduce the space required for the installation of the suspension bracket 2, and the core shaft 2011 is directly connected to the frame of the vehicle without providing connecting ears on the frame, which can reduce parts and save costs. At the same time, compared with the prior art, the installation space required for the suspension bracket 2 can be reduced, the use needs of vehicles with rear-wheel steering requirements can be met, and the application range of the vehicle model can be expanded.

[0032] In the prior art, the rear motor suspension generally adopts a three-point suspension design, all of which are arranged on the rear subframe 1. Its structure generally includes three parts: a left suspension component, a right suspension component and a front or rear suspension component. However, with the rise of rear-wheel steering technology, since the rear-wheel steering motor and the steering rod are both arranged on the front crossbeam of the rear subframe, the arrangement space of the rear motor front suspension component arranged at the front crossbeam of the rear subframe is further compressed, resulting in the original structure being unable to meet the requirements, and the NVH performance is reduced. At the same time, the rear motor front suspension component is generally fixedly connected to the subframe through multiple suspension brackets, and more parts are required; a suspension structure of a vehicle of the utility model directly connects the suspension bracket to the frame of the vehicle through a connecting piece. Compared with the prior art in which the suspension bracket is connected to the mounting ear of the subframe by bolts, the connection strength between the suspension bracket and the subframe can be improved, and the installation space required for the suspension bracket can be reduced, thereby meeting the layout requirements of vehicles with rear-wheel steering requirements, and can adapt to a variety of vehicle models.

[0033] In this embodiment, the core shaft 2011 extends along the Y direction of the vehicle, and the slot of the installation slot 102 faces the Z direction of the vehicle; in this structure, the X direction is the front-back direction relative to the vehicle, the Y direction is the left-right direction relative to the vehicle, and the Z direction is the up-down direction relative to the vehicle, and the installation slot 102 opens toward the Z direction;

[0034] The core shaft 2011 spans the notch of the mounting groove 102, and both ends are fixedly connected to the frame via a connecting piece 203 extending along the Z direction of the vehicle; the core shaft 2011 spans the notch of the mounting groove 102 and is fixedly connected to the frame via the connecting piece 203, so that the core shaft 2011 can withstand a larger torque when in use compared with the prior art.

[0035] In this embodiment, the vehicle frame includes a sub-frame 1, and the suspension bracket 2 further has a second mounting portion 202; the sub-frame 1 is a rear sub-frame;

[0036] The first mounting portion 201 is connected to the sub-frame 1, and the second mounting portion 202 is connected to the powertrain of the vehicle; the second mounting portion 202 is connected to the housing of the powertrain of the vehicle, and the powertrain may be a motor and a generator, etc.

[0037] In this embodiment, the elastomer is a double-layer cylinder structure, the inner cylinder 2012 is connected to the outer cylinder 2016 through a plurality of vibration-damping supports 2013 distributed along the circumferential direction, and the inner wall of the outer cylinder 2016 is provided with a plurality of limit bumps 2014 facing the inner cylinder 2012; the vibration-damping supports 2013 are preferably four, and the limit bumps 2014 are preferably four, and are respectively arranged between two vibration-damping supports 2013 and on the inner wall of the outer cylinder. The limit bumps 2014 are arranged to avoid the inner cylinder 2012 directly colliding with the outer cylinder 2016 under certain extreme working conditions, causing abnormal noise in the first mounting part 201.

[0038] In this embodiment, boss structures 101 are provided on both sides of the installation groove 102 . The boss structures 101 are provided so that the sub-frame 1 has a variable cross-section design at this point, which can improve the dynamic stiffness of the connection between the suspension bracket 2 and the sub-frame 1 .

[0039] In this embodiment, the boss structure 101 is provided with a mounting hole, and the connecting member 203 passes through the mounting hole and fixes the core shaft 2011 to the sub-frame 1; the core shaft 2011 is provided with a connecting hole 20111 that matches the mounting hole. The boss structure 101 is provided, and the connecting member 203 passes through the connecting hole 20111 and then passes through the mounting hole to fix the core shaft 2011 to the sub-frame 1, which can improve the dynamic stiffness of the connection between the first mounting part 201 and the sub-frame 1, and at the same time can further improve the vibration isolation capability of the suspension bracket 2.

[0040] In this embodiment, the cross-section of the inner layer cylinder 2012 is a prismatic structure, and the middle part of the core shaft 2011 is conformed to the inner layer cylinder 2012; the cross-section of the inner layer cylinder 2012 is a prismatic structure, for example, it can be a square structure, and the core shaft 2011 is conformed to the square structure, which can prevent the inner layer cylinder 2012 from rotating around the core shaft 2011, increase the contact force between the vibration damping support 2013 and the core shaft 2011, and reduce the risk of suspension failure.

[0041] In this embodiment, the subframe 1 includes a crossbeam, the mounting groove 102 is arranged on the crossbeam, and the core shaft 2011 is approximately parallel to the crossbeam; so that the axis of the elastic body is approximately parallel to the crossbeam, which is conducive to positioning and installation, and can also improve the vibration isolation effect.

[0042] In this embodiment, a plurality of weight-reducing holes and reinforcing ribs 2021 are provided on the second mounting portion 202; the first mounting portion 201 is provided with reinforcing ribs 2015; in this structure, the cross-section of the first mounting portion 201 is circular, and reinforcing ribs 2015 are provided on the outer side of the first mounting portion 201, and the reinforcing ribs 2015 are convex ribs and are distributed along the outer side of the first mounting portion 201. The reinforcing ribs 2015 can improve the dynamic stiffness of the first mounting portion 201, and at the same time, the weight-reducing holes and reinforcing ribs 2015 are provided on the second mounting portion 202, so as to achieve lightweight structure while ensuring the structural strength of the second mounting portion 202.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A suspension structure for a vehicle, characterized in that: It includes a suspension bracket, and the suspension bracket is connected to the frame of the vehicle through a connecting piece; The suspension bracket has a first mounting portion, and a shaft sleeve is provided on the first mounting portion; The shaft sleeve includes a core shaft penetrating the suspension bracket, and an elastic body sleeved on the core shaft; The frame has a mounting groove matched with the first mounting portion, and the connecting member passes through the core shaft and the frame to fix the core shaft on the frame, and the connecting position is located near the notch of the mounting groove.

2. The vehicle suspension structure according to claim 1, characterized in that: The mandrel extends along the Y direction of the vehicle, and the notch of the mounting groove faces the Z direction of the vehicle; The core shaft spans the notch of the mounting groove, and both ends are fixedly connected to the vehicle frame through a connecting piece extending along the Z direction of the vehicle.

3. The vehicle suspension structure according to claim 1 or 2, characterized in that: The frame includes a sub-frame, and the suspension bracket also has a second mounting portion; The first mounting portion is connected to the subframe, and the second mounting portion is connected to a powertrain of the vehicle.

4. The vehicle suspension structure according to claim 1 or 2, characterized in that: The elastic body is a double-layer cylinder structure, the inner cylinder is connected to the outer cylinder through a plurality of vibration-damping supports distributed along the circumferential direction, and a plurality of position-limiting bumpers facing the inner cylinder are arranged on the inner wall of the outer cylinder.

5. The vehicle suspension structure according to claim 3, characterized in that: Boss structures are arranged on both sides of the installation groove.

6. The vehicle suspension structure according to claim 5, characterized in that: The boss structure is provided with a mounting hole, and the connecting member passes through the mounting hole and fixes the core shaft to the sub-frame.

7. The vehicle suspension structure according to claim 4, characterized in that: The cross section of the inner cylinder is a prismatic structure, and the middle portion of the core shaft is conformed to the inner cylinder.

8. The vehicle suspension structure according to claim 3, characterized in that: The sub-frame comprises a crossbeam, the mounting groove is arranged on the crossbeam, and the core shaft is approximately parallel to the crossbeam.

9. The vehicle suspension structure according to claim 3, characterized in that: The second mounting portion is provided with a plurality of weight-reducing holes and reinforcing ribs; the first mounting portion is provided with reinforcing ribs.

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