String type two-stage vibration isolation suspension assembly
By designing a series-type secondary vibration isolation suspension assembly in the suspension assembly of a new energy electric vehicle, and using the series-connected structure of the second vibration isolation bushing and the inner rod of the bushing, the problem of poor vibration isolation performance in the high-frequency stage is solved, and better vibration isolation effect and motor vibration control are achieved.
Patent Information
- Application Number
- CN202421683214.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-16
- Publication Date
- 2025-05-06
- Estimated Expiration
- 2034-07-16
AI Technical Summary
When new energy electric vehicles accelerate, traditional suspension components have poor vibration isolation performance in high-frequency stages, resulting in the driving motor being prone to howling problems, and increases the motor vibration amplitude and the risk of suspension bushing failure.
A series-type secondary vibration isolation suspension assembly is designed, and a second vibration isolation bushing is added to both ends of the first vibration isolation bushing and fixed in series by the inner rod of the bushing to form a secondary vibration isolation effect, reducing excitation transmission and improving vibration isolation performance.
It effectively improves vibration isolation performance, reduces the motor vibration amplitude, reduces the risk of tearing of suspended bushings, ensures the layout of the motor in a limited space, and improves the reliability of use.
Smart Images
Figure CN222836168U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of vehicle vibration reduction, in particular to a series-type secondary vibration isolation suspension component. Background Art
[0002] When new energy electric vehicles are accelerating, the excitation frequency range of the drive motor is large. The vibration isolation performance of traditional rubber mounts and hydraulic mounts deteriorates at high frequencies, and the drive motor is prone to howling problems. In related technologies, a secondary vibration isolation mount is usually formed by adding a small bushing to the bolt mounting hole. This structural form improves the overall vibration isolation performance of the suspension assembly to a certain extent, which can reduce the vibration transmitted from the motor to the vehicle body and reduce the motor howling noise. However, since the main rubber bushing of the suspension is far away from the bolt mounting hole, and the bolt mounting holes are mostly arranged perpendicular to the main rubber bushing, the hinged structure formed between the motor side bracket and the vehicle body side increases the vibration amplitude of the motor, increases the risk of interference between the motor and surrounding parts, and is not conducive to the arrangement of the motor in a limited space; and the increase in the vibration amplitude of the motor is prone to tearing and failure of the suspension bushing.
[0003] Therefore, there is an urgent need to develop and design a new suspension component that can effectively improve the vibration isolation performance, while helping to reduce the vibration amplitude of the motor, ensure the motor layout in a limited space, reduce the risk of tearing of the suspension bushing, and improve reliability. Utility Model Content
[0004] In view of this, the purpose of the utility model is to provide a series-type secondary vibration isolation suspension assembly, which can effectively improve the vibration isolation performance, reduce the vibration amplitude of the motor, ensure the layout of the motor in a limited space, and reduce the risk of tearing of the suspension bushing, thereby improving the reliability of use.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a series-type secondary vibration isolation suspension assembly, comprising: a suspension bracket, the suspension bracket is provided with a first mounting hole, the first mounting hole is fixedly sleeved with a first vibration isolation bushing; a mounting bracket, the mounting bracket has second mounting holes respectively arranged at the axial ends of the first mounting hole, the second mounting hole is fixedly sleeved with a second vibration isolation bushing; a bushing inner rod, the bushing inner rod connects and fixes the first vibration isolation bushing and the two second vibration isolation bushings in series.
[0006] Furthermore, the mounting bracket includes two mounting seats symmetrically arranged at two axial ends of the first mounting hole, and the two second mounting holes are correspondingly arranged on the two mounting seats.
[0007] Furthermore, the first vibration isolation bushing fixed sleeve has a first bushing outer tube, which is fixedly sleeved in the first mounting hole; the second vibration isolation bushing fixed sleeve has a second bushing outer tube, which is fixedly sleeved in the second mounting hole.
[0008] Furthermore, the first vibration isolation bushing and the second vibration isolation bushing are both rubber bushings.
[0009] Furthermore, the first vibration isolation bushing and the second vibration isolation bushing are respectively fixed to the bushing inner rod by vulcanization.
[0010] Furthermore, the mounting seat is a T-shaped seat, and connecting holes are respectively provided on two wing plates of the T-shaped seat.
[0011] Furthermore, the first vibration isolation bushing is evenly provided with a plurality of buffer holes along the circumferential direction.
[0012] Furthermore, the cross section of the buffer hole is V-shaped, and the buffer hole passes through the first vibration isolation bushing along the axial direction.
[0013] Furthermore, annular buffer grooves are respectively provided on the end surfaces at both axial ends of the second vibration isolation bushing.
[0014] Furthermore, it also includes a mass block fixedly connected to the end of the inner rod of the bushing.
[0015] Compared with the prior art, the utility model has the following beneficial effects:
[0016] The serial-type secondary vibration isolation suspension assembly provided by the utility model forms a secondary vibration isolation effect by adding second vibration isolation bushings at both axial ends of the first vibration isolation bushing, which can reduce the excitation transmitted from the suspension bracket to the mounting bracket and effectively improve the vibration isolation performance; at the same time, since the first vibration isolation bushing and the two second vibration isolation bushings are fixed in series by the inner rod of the bushing, the elastic center lines of the two second vibration isolation bushings and the first vibration isolation bushing coincide, and the force deformation of each vibration isolation bushing can be compensated and superimposed to a certain extent, and the two second vibration isolation bushings are closer to the first vibration isolation bushing, which can effectively reduce the displacement of the suspension bracket, and thus help reduce the displacement of the motor connected to the suspension bracket, ensure the arrangement of the motor in a limited space, and reduce the risk of interference; of course, it also helps to reduce the risk of tearing of each vibration isolation bushing and improve the reliability of use; in addition, the secondary vibration isolation suspension assembly in the present structure has a simple structure and is easy to install.
[0017] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and will be apparent to those skilled in the art based on the following examination and research, or can be taught from the practice of the present invention to some extent. The objectives and other advantages of the present invention can be achieved and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 This is a schematic diagram of the cross-sectional structure of the utility model after removing the mass block.
[0019] Figure 2This is a schematic diagram of the shaft side structure of the utility model
[0020] Figure 3 This is a schematic diagram of the explosion structure of the utility model
[0021] Figure markings: 1-suspension bracket; 1a-first mounting hole; 2-first vibration isolation bushing; 201-buffer hole; 3-mounting bracket; 3a-second mounting hole; 301-mounting seat; 301a-connecting hole; 4-second vibration isolation bushing; 401-annular buffer groove; 5-bushing inner rod; 6-first bushing outer tube; 7-second bushing outer tube; 8-mass block. DETAILED DESCRIPTION
[0022] The following describes the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only used to illustrate the basic concept of the present invention, and the following embodiments and the features in the embodiments can be combined with each other without conflict.
[0023] See also Figure 1-3 This embodiment discloses a serial type secondary vibration isolation suspension assembly, comprising:
[0024] A suspension bracket 1, wherein the suspension bracket 1 is provided with a first mounting hole 1a, wherein a first vibration isolation bushing 2 is fixedly sleeved inside the first mounting hole 1a, wherein the first vibration isolation bushing 2 is preferably a rubber bushing, and the fixing method of the first vibration isolation bushing 2 and the first mounting hole 1a is not limited here, such as interference fit, etc., and the suspension bracket 1 can be used to be connected to the motor or the motor side bracket during use;
[0025] The mounting bracket 3 has second mounting holes 3a disposed at two axial ends of the first mounting hole 1a, and the second mounting hole 3a is fixedly sleeved with a second vibration isolation bushing 4, wherein the second vibration isolation bushing 4 is preferably a rubber bushing, and the fixing method of the second vibration isolation bushing 4 and the second mounting hole 3a is not limited here, such as interference fit, etc., and the mounting bracket 3 can be used to connect with the vehicle body structure, such as a subframe, etc. during use; the mounting bracket 3 can be a bracket of an integral structure, and can also be composed of a plurality of independent small brackets;
[0026] The bushing inner rod 5, the bushing inner rod 5 connects and fixes the first vibration isolation bushing 2 and the two second vibration isolation bushings 4 in series. The shape of the bushing inner rod 5 is not limited. It is preferably a solid round rod. Of course, in other embodiments, a hollow tube or other structure can be selected. In addition, the bushing inner rod 5 is an integral rod. In other embodiments, the bushing inner rod 5 can be designed as a multi-section rod splicing structure, and each section of the rod can be detachably spliced by bolts. "Fixed in series" means that the first vibration isolation bushing 2 and the two second vibration isolation bushings 4 are fixed on a rod in series.
[0027] In the above structural design, a secondary vibration isolation effect is formed by adding second vibration isolation bushings 4 at both axial ends of the first vibration isolation bushing 2. Specifically, during use, the excitation is first transmitted from the suspension bracket to the first vibration isolation bushing 2, and the first vibration isolation bushing 2 is transmitted to the bushing inner rod 5 after vibration reduction, and the bushing inner rod 5 is then transmitted to the second vibration isolation bushing 4, and the second vibration isolation bushing 4 is transmitted to the mounting bracket 3 after vibration reduction, thereby reducing the excitation transmitted from the suspension bracket 1 to the mounting bracket 3, effectively improving the vibration isolation performance, and helping to reduce the NVH of the whole vehicle; at the same time, since the first vibration isolation bushing 2 and the two second vibration isolation bushings 4 are fixed in series by the bushing inner rod 5, the elastic center lines of the two second vibration isolation bushings 4 and the first vibration isolation bushing 2 coincide, and each vibration isolation bushing The stress deformation can be compensated and superimposed to a certain extent, and the two second vibration isolation bushings 4 are close to the first vibration isolation bushing 2, which can effectively reduce the displacement of the suspension bracket 1. This displacement refers to the spatial displacement of the suspension bracket 1 caused by the deformation of the bushing under the excitation of the road surface during vehicle operation, which is beneficial to reduce the displacement of the motor connected to the suspension bracket 1, ensure the motor arrangement within a limited space, and reduce the risk of interference; of course, it is also beneficial to reduce the risk of tearing of each vibration isolation bushing and improve the reliability of use; in addition, the secondary vibration isolation suspension component in this structure is simple in structure and easy to install; in addition, the suspension component in the structural design is convenient for 28 working condition calculations and CAE simulation analysis, and the deviation between the calculation results and the actual results is small.
[0028] In this embodiment, the mounting bracket 3 includes two mounting seats 301 symmetrically arranged at the axial ends of the first mounting hole 1a, and the two second mounting holes 3a are correspondingly arranged on the two mounting seats 301; in this structural design, by designing the mounting bracket 3 as two independent mounting seats 301, the assembly and production of the overall structure can be facilitated, and the two second vibration isolation bushings 4 can be fixed in advance on the two ends of the bushing inner rod 5, and the two mounting seats 301 can be respectively assembled on the second vibration isolation bushings 4 from both sides of the suspension bracket 1, which is conducive to reducing the production cost; of course, the two symmetrically arranged mounting seats 301 are conducive to ensuring the symmetrical force of the suspension bracket 1 and to forming a stable support for the suspension bracket 1.
[0029] In this embodiment, the first vibration isolation bushing 2 is fixedly sleeved with a first bushing outer tube 6, and the first bushing outer tube 6 is fixedly sleeved in the first mounting hole 1a. The first bushing outer tube 6 is usually a metal outer tube. The design of the first bushing outer tube 6 is conducive to enhancing the connection stability between the first vibration isolation bushing 2 and the suspension bracket 1 and the bushing inner rod 5. Here, the first bushing outer tube 6 is respectively interference fit with the first vibration isolation bushing 2 and the suspension bracket 1; the second vibration isolation bushing 4 is fixedly sleeved with a second bushing outer tube 7, and the second bushing outer tube 7 is fixedly sleeved in the second mounting hole 3a. The second bushing outer tube 7 is usually a metal outer tube. The design of the second bushing outer tube 7 is conducive to enhancing the connection stability between the second vibration isolation bushing 4 and the mounting seat 301 and the bushing inner rod 5. Here, the second bushing outer tube 7 is respectively interference fit with the second vibration isolation bushing 4 and the mounting seat 301; in this overall structural design, it is conducive to further simplifying the manufacturing cost and ensuring the reliability of the overall structural connection.
[0030] In this embodiment, the first vibration isolation bushing 2 and the second vibration isolation bushing 4 are both rubber bushings; the rubber bushings have good vibration isolation effect and good durability; and are conducive to further improving the vibration isolation performance.
[0031] In this embodiment, the first vibration isolation bushing 2 and the second vibration isolation bushing 4 are respectively fixed to the bushing inner rod 5 by vulcanization; the vulcanization fixing method has a mature process, is easy to manufacture, and has a high connection strength.
[0032] In this embodiment, the mounting seat 301 is a T-shaped seat, and connecting holes 301a are respectively provided on the two wing plates of the T-shaped seat; the T-shaped seat has a simple structure and good supporting strength. The design of the connecting holes 301a is conducive to the installation of the mounting seat 301 and the vehicle body structure, and the mounting seat 301 can be fixed by bolts.
[0033] In this embodiment, the first vibration isolation bushing 2 is evenly distributed with a plurality of buffer holes 201 along the circumferential direction; specifically, there are four of them here, but of course, the number can be designed to be other numbers as required; by designing the buffer holes 201, the vibration isolation performance of the first vibration isolation bushing 2 is further improved.
[0034] In this embodiment, the buffer hole 201 has a V-shaped cross section, and the buffer hole 201 axially penetrates the first vibration isolation bushing 2; the structure of the buffer hole 201 is conducive to adapting to multi-directional impact forces during vehicle operation, and has a good vibration isolation effect.
[0035] In this embodiment, annular buffer grooves 401 are respectively provided on the end faces at both axial ends of the second vibration isolation bushing 4. Since the second vibration isolation bushing 4 is usually smaller than the first vibration isolation bushing 2, the annular buffer grooves 401 designed in this structure are beneficial to improving the vibration isolation effect of the second vibration isolation bushing 4 while ensuring the structural strength of the second vibration isolation bushing 4.
[0036] In this embodiment, it also includes a mass block 8 fixedly connected to the end of the inner rod 5 of the bushing. The mass block 8 can be fixed to the inner rod 5 of the bushing by bolting or welding, and mass blocks 8 of different sizes can be set according to needs; in other embodiments, the mass block 8 can also be replaced by a vibration absorber, etc.; by adding a mass block 8 to the inner rod 5 of the bushing, the operating frequency range of the secondary vibration isolation suspension can be changed to meet more working conditions.
[0037] 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 series type secondary vibration isolation suspension assembly, characterized in that: include: A suspension bracket (1), the suspension bracket (1) being provided with a first mounting hole (1a), the first mounting hole (1a) being fixedly sleeved with a first vibration isolation bushing (2); A mounting bracket (3), the mounting bracket (3) having second mounting holes (3a) arranged at two axial ends of the first mounting hole (1a), the second mounting hole (3a) being fixedly sleeved with a second vibration isolation bushing (4); A bushing inner rod (5) is provided, wherein the bushing inner rod (5) connects and fixes the first vibration isolation bushing (2) and the two second vibration isolation bushings (4) in series.
2. The serial type secondary vibration isolation suspension assembly according to claim 1, characterized in that: The mounting bracket (3) comprises two mounting seats (301) symmetrically arranged at two axial ends of the first mounting hole (1a), and the two second mounting holes (3a) are correspondingly arranged on the two mounting seats (301).
3. The serial type secondary vibration isolation suspension assembly according to claim 2, characterized in that: The first vibration isolation bushing (2) is fixedly provided with a first bushing outer tube (6), and the first bushing outer tube (6) is fixedly sleeved in the first mounting hole (1a); The second vibration isolation bushing (4) is fixedly provided with a second bushing outer tube (7) on its outer sleeve, and the second bushing outer tube (7) is fixedly sleeved on the second mounting hole (3a).
4. The serial type secondary vibration isolation suspension assembly according to claim 3 is characterized in that: The first vibration isolation bushing (2) and the second vibration isolation bushing (4) are both rubber bushings.
5. The serial type secondary vibration isolation suspension assembly according to claim 4, characterized in that: The first vibration isolation bushing (2) and the second vibration isolation bushing (4) are respectively fixed to the bushing inner rod (5) by vulcanization.
6. The serial type secondary vibration isolation suspension assembly according to claim 2, characterized in that: The mounting seat (301) is a T-shaped seat, and connection holes (301a) are respectively provided on the two wing plates of the T-shaped seat.
7. The serial type secondary vibration isolation suspension assembly according to claim 1, characterized in that: The first vibration isolation bushing (2) is provided with a plurality of buffer holes (201) evenly distributed along the circumferential direction.
8. The serial type secondary vibration isolation suspension assembly according to claim 7, characterized in that: The buffer hole (201) has a V-shaped cross section, and the buffer hole (201) penetrates the first vibration isolation bushing (2) in the axial direction.
9. The serial type secondary vibration isolation suspension assembly according to claim 1, characterized in that: The second vibration isolation bushing (4) is provided with an annular buffer groove (401) on both axial end surfaces.
10. The serial type secondary vibration isolation suspension assembly according to claim 1, characterized in that: It also includes a mass block (8) fixedly connected to the end of the inner rod (5) of the bushing.