A multi-stage shock absorption device and a motor mounting structure

Abstract

The present invention provides a multi-stage shock absorption device and a motor mounting structure, which includes a rubber column, a first spring and a second spring. The rubber column is the main body and is cylindrical, and the rubber column has elasticity. The first spring and the second spring are arranged inside the rubber column. The rubber column, the first spring and the second spring are coaxial. The second spring is arranged inside the first spring, and the heights and elastic coefficients of the first spring and the second spring are different. The motor mounting structure mainly includes a base, a frame, a motor, a lower multi-stage shock absorption device and an upper multi-stage shock absorption device. The motor is fixed inside the frame formed by the base and the frame through the lower multi-stage shock absorption device and the upper multi-stage shock absorption device. The multi-stage shock absorption device of the present invention can support and guide the first spring and the second spring, and effectively reduce the complexity of the installation structure of the multi-stage shock absorption device, improving the production and installation efficiency.

Description

Technical Field

[0001] The present invention relates to the field of motor vibration reduction, and particularly to a multi-stage shock absorption device and a motor mounting structure. Background Art

[0002] With the rapid development of new energy in China, electric vehicles are becoming more and more popular. Electric vehicles use power batteries as the main driving energy and are driven by motors, without consuming fuel, and can achieve zero pollutant emissions. Along with the popularization of electric vehicles, the requirements of enterprises and consumers for the performance of electric vehicles are getting higher and higher.

[0003] The motor of an electric vehicle is one of the three major components of an electric vehicle. When the motor is installed in a vehicle and used, due to the bumps that the vehicle is prone to during driving, vibrations are generated in the motor. Moreover, when the electric vehicle is running, the motor rotates at a high speed. During the rotation of the rotor, affected by its own cogging torque, electromagnetic force and other excitations, it will also generate vibrations by itself and is prone to resonance. On the one hand, the vibrations generated by the motor will cause an increase in noise, and the motor is easily damaged due to long-term vibrations, thereby reducing the service life of the brushless motor; on the other hand, the vibrations generated by the motor will be transmitted to the vehicle frame in contact with it, and then transmitted to the vehicle body and seats, and may ultimately affect the driving or riding comfort of the driver and passengers.

[0004] Although there are already vibration reduction devices for motors in the prior art, the existing vibration reduction devices cannot simply achieve multi-stage vibration reduction, and the installation structure is complex, resulting in many problems such as poor vibration reduction effect, high production cost, and inconvenient installation.

[0005] Since different types and intensities of vibrations will be generated during the use of an automotive motor, due to the characteristics of the multi-stage vibration reduction structure, compared with the single-stage vibration reduction structure, it can effectively reduce the vibration of the automotive motor. However, in the prior art, usually two or more different forms of vibration reduction structures arranged in parallel are used to achieve multi-stage vibration reduction, or a spring group with different lengths and different elastic coefficients is used for multi-stage vibration reduction by internal and external sleeving. However, due to the limitations of their structures themselves, these multi-stage vibration reduction structures need to adopt relatively complex fixing methods when applied to the motor mounting structure, which is inconvenient for installation and the vibration reduction effect is not ideal.

[0006] In view of this, it is indeed necessary to further improve the existing vibration reduction device to simply and effectively achieve multi-stage vibration reduction, and at the same time improve the vibration reduction mounting structure of the motor, improve production efficiency, and reduce production costs. Summary of the Invention

[0007] To solve the above technical problems, the present invention provides a multi-stage shock absorption device and a motor mounting structure. Through the improved multi-stage shock absorption structure, multi-stage shock absorption is simply and effectively achieved. At the same time, through the improvement of the motor mounting structure, effective shock absorption and installation fixation of the motor are realized, while improving efficiency and reducing costs.

[0008] To achieve the above object, the present invention provides a multi-stage shock absorption device, including a rubber column, a first spring and a second spring. The rubber column is the main body and is cylindrical, and the rubber column has elasticity; the first spring and the second spring are arranged inside the rubber column, and the first spring and the second spring are wrapped by the rubber column to form support and guidance for the first spring and the second spring; the rubber column, the first spring and the second spring are coaxially arranged, the second spring is arranged inside the first spring, and the heights and elastic coefficients of the first spring and the second spring are different; the elastic coefficient of the rubber column is less than the elastic coefficient of the first spring; the elastic coefficient of the first spring is less than the elastic coefficient of the second spring; the height of the first spring is higher than the height of the second spring.

[0009] Further, the height of the first spring is equal to the height of the rubber column.

[0010] Further, the height of the first spring is less than the height of the rubber column.

[0011] Further, a lower reinforcement plate is arranged at the bottom of the rubber column, and the lower parts of the rubber column, the first spring and the second spring are all fixed on the lower reinforcement plate.

[0012] Further, an annular groove is arranged at the top of the rubber column, and an upper reinforcement ring is arranged in the groove, and the top surface of the upper reinforcement ring is flush with the upper surface of the rubber column.

[0013] The present invention also provides a motor mounting structure of the multi-stage shock absorption device. The motor mounting structure mainly includes a base, a frame, a motor, a lower multi-stage shock absorption device and an upper multi-stage shock absorption device; the base and the frame form a generally cuboid frame; the motor is fixed inside the frame through the lower multi-stage shock absorption device and the upper multi-stage shock absorption device.

[0014] Further, four frame lower mounting platforms are arranged at the lower four corners of the frame, and four frame upper mounting platforms are arranged at the upper four corners; one end of the four lower multi-stage shock absorption devices is supported on the frame through the frame lower mounting platform, and the other end is supported on the motor lower mounting platform arranged at the lower part of the motor side; one end of the four upper multi-stage shock absorption devices is supported on the frame through the frame upper mounting platform, and the other end is supported on the motor upper mounting platform arranged at the upper part of the motor side.

[0015] Further, a first fixing groove and a second fixing groove are respectively arranged on the frame lower mounting platform and the motor lower mounting platform, and both ends of the lower multi-stage shock absorption device are respectively installed in the first fixing groove and the second fixing groove.

[0016] Further, the included angle range formed by the center line of the lower shock absorber and the horizontal plane is 60 - 70 degrees, and the included angle range between the center line of the upper shock absorber and the horizontal plane is 30 - 40 degrees.

[0017] Further, the included angle formed by the center line of the lower shock absorber and the horizontal plane is 65 degrees, and the included angle between the center line of the upper shock absorber and the horizontal plane is 35 degrees.

[0018] Based on the above design, the present invention has the following beneficial effects:

[0019] First, the multi - stage shock absorber of the present invention wraps the first spring and the second spring through rubber columns, which can support and guide the first spring and the second spring. When installing, there is no need to adopt additional structures to fix and guide the first spring and the second spring, which can effectively reduce the complexity of the installation structure of the multi - stage shock absorber and improve the production and installation efficiency. At the same time, through the design of the height and elastic coefficient of the rubber columns, the first spring and the second spring, the effect of multi - stage shock absorption is improved. The setting of the lower reinforcing plate 44 strengthens the bottom surface of the rubber column 41 on the one hand and plays a role in uniform stress on the other hand; on the other hand, it is convenient to fix the lower parts of the first spring 42 and the second spring 43, which is convenient for manufacturing and processing. Since there is no spring at the top of the rubber column 41, the design of the upper reinforcing ring 45 is adopted at this time. While strengthening the top surface strength of the rubber column and making the force more uniform, it is also convenient for the fixation of the upper reinforcing ring 45, which can save costs and improve production efficiency.

[0020] Second, the multi - stage shock absorber of the present invention is provided with a lower reinforcing plate and an upper reinforcing ring. On the one hand, it strengthens the bottom surface and the top surface of the rubber column, realizes uniform stress, and at the same time is convenient for fixing the lower parts of the first spring and the second spring, which is convenient for manufacturing and processing, can save costs and improve production efficiency.

[0021] Third, in the motor installation structure of the present invention, through four lower multi - stage shock absorbers and four upper multi - stage shock absorbers, the motor is effectively fixed inside the frame and multi - stage shock absorption is achieved. By selecting the included angles between the center lines of the lower shock absorber and the upper shock absorber and the horizontal plane, the motor can be effectively supported and the vibrations in the vertical and horizontal directions of the motor can be effectively attenuated. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0023] Figure 1 It is a schematic structural diagram of the motor mounting structure of the present invention;

[0024] Figure 2 It is a front view of the motor mounting structure of the present invention;

[0025] Figure 3 It is a side view of the motor mounting structure of the present invention;

[0026] Figure 4 It is an installation sectional view of the multi - stage damping device in the motor mounting structure of the present invention;

[0027] Figure 5 It is a schematic structural diagram of the first embodiment of the multi - stage damping device of the present invention;

[0028] Figure 6 It is a schematic structural diagram of the second embodiment of the multi - stage damping device of the present invention;

[0029] Figure 7 It is a schematic structural diagram of the third embodiment of the multi - stage damping device of the present invention.

[0030] 1. Base; 2. Frame; 3. Motor; 4. Lower damping device; 5. Upper damping device; 6. Frame body; 7. Lower mounting platform of the frame; 8. Upper mounting platform of the frame; 9. Lower mounting platform of the motor; 10. Upper mounting platform of the motor; 11. First installation groove; 12. Second installation groove; 41. Rubber column; 42. First spring; 43. Second spring; 44. Lower fixing plate; 45. Upper strengthening ring. Specific embodiments

[0031] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0032] The following illustrates the implementation manners of the present invention through specific specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The present invention can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0033] It should be noted that the following describes various aspects of embodiments within the scope of the appended claims. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on the present invention, those skilled in the art should understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device can be implemented and this method can be practiced using other structures and / or functionality in addition to one or more of the aspects set forth herein.

[0034] It should also be noted that the drawings provided in the following embodiments only schematically illustrate the basic concept of the present invention. The components shown in the drawings only show the components related to the present invention and are not drawn according to the number, shape, and size of the components in actual implementation. The type, quantity, and ratio of each component in its actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0035] In addition, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that the examples can be practiced without these specific details.

[0036] Meanwhile, in this specification, regarding the description of directions, such as up, down, left, right, front, back, inside, outside, longitudinal, transverse, vertical, horizontal, etc., the directions or positional relationships indicated are based on the directions or positional relationships shown in the drawings. This is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be construed as a limitation to the present invention.

[0037] Moreover, in the description of this specification, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected", and "coupled" should be understood in a broad sense.

[0038] Figure 1 The structural schematic diagram of the motor mounting structure of the present invention is shown. The motor mounting structure mainly includes a base 1, a frame 2, a motor 3, a lower multi-stage vibration damping device 4, and an upper multi-stage vibration damping device 5. The base 1 and the frame 2 form a generally rectangular parallelepiped frame 6, and the motor 3 is fixed inside the frame through the lower multi-stage vibration damping device 4 and the upper multi-stage vibration damping device 5. The base 1 is generally a rectangular structure. The four vertical beams of the frame 2 are fixedly arranged at the four corners of the base 1. The top of the frame is formed into a quadrilateral frame by four cross beams, and the four corners of the frame are fixedly connected to the tops of the four vertical beams.

[0039] Combined with the attached Figure 2 and 3It can be seen that four frame lower mounting platforms 7 are provided at the lower four corners of the frame body 6, and four frame upper mounting platforms 8 are provided at the upper four corners. One ends of the four lower multi-stage damping devices 4 are supported on the frame body 6 through the frame lower mounting platforms 7, and the other ends are supported on the motor lower mounting platform 9 provided at the lower part of the motor side. One ends of the four upper multi-stage damping devices 5 are supported on the frame body 6 through the frame upper mounting platforms 8, and the other ends are supported on the motor upper mounting platform 10 provided at the upper part of the motor side. Through the four lower multi-stage damping devices 4 and the four upper multi-stage damping devices 5, the motor is effectively fixed inside the frame body 6 and multi-stage damping is achieved.

[0040] See Figure 2 , the included angle between the center line of the lower damping device 4 and the horizontal plane is θ1, and the included angle between the center line of the upper damping device 5 and the horizontal plane is θ2, where the range of θ1 is 60 - 70 degrees and the range of θ2 is 30 - 40 degrees. Due to the action of gravity on the motor, its gravity is mainly supported by the lower damping device 4. Designing the range of the included angle θ1 between the center line of the lower damping device 4 and the horizontal plane to be 60 - 70 degrees can effectively support the motor and effectively attenuate the vibration in the vertical direction, and at the same time also has a certain attenuation effect on the vibration in the horizontal direction. Designing the range of the included angle θ2 between the center line of the upper damping device 4 and the horizontal plane to be 30 - 40 degrees can effectively attenuate the vibration in the horizontal direction by using it. The center lines of the lower damping device 4 and the upper damping device 5 can be parallel to the vertical plane perpendicular to the motor axis; it can also be selected that the center lines of the lower damping device 4 and the upper damping device 5 can form a certain included angle with the vertical plane perpendicular to the motor axis, so as to attenuate the vibration in the direction of the motor axis.

[0041] Figure 4 It is a sectional view of the installation of a lower multi-stage damping device in the motor installation structure. It can be seen that a first fixing groove 11 and a second fixing groove 12 are respectively provided on the frame lower mounting platform 7 and the motor lower mounting platform 9, and both ends of the lower multi-stage damping device 4 are respectively installed in the first fixing groove 11 and the second fixing groove 12, so as to effectively install and fix the multi-stage damping device. The specific installation structure of the upper multi-stage damping device is the same as the above structure and will not be elaborated here.

[0042] Figures 5-7 The three embodiments of the multi-stage damping device in the motor installation structure of the present invention are shown.

[0043] See Figure 5, in the first embodiment, the multi - stage damping device is composed of a rubber column 41, a first spring 42 and a second spring 43. The rubber column 41 of the multi - stage damping device is generally cylindrical. The first spring 42 and the second spring 43 are arranged inside the rubber column 41. The rubber column 41, the first spring 42 and the second spring 43 are coaxially arranged, and the second spring 43 is arranged inside the first spring 42. The heights and elastic coefficients of the first spring 42 and the second spring 43 are different. Among them, the height of the first spring 42 is higher than that of the second spring 43, but the elastic coefficient of the first spring 42 is smaller than that of the second spring 43. The rubber column 41 also has elasticity, and the elastic coefficient of the rubber column 41 is smaller than that of the first spring 42. Among them, the rubber column 41 and the first spring 42 have the same height, both being h1; the height of the second spring 43 is h2. The heights h1 of the rubber column 41 and the first spring 42 are greater than the height h2 of the second spring 43. Preferably, the ratio of h1:h2 can be selected as 3:2. Preferably, the ratio of the diameter to the height of the rubber column can be selected as 1:1.5, or other values can be selected according to the actual application needs.

[0044] Since the elastic coefficients of the rubber column 41, the first spring 42 and the second spring 43 are different, and the heights of the first spring 42 and the second spring 43 are different, multi - stage damping is formed. At the same time, the rubber column 41 wraps the first spring 42 and the second spring 43, and can support and guide the first spring 42 and the second spring 43. When installing, there is no need to adopt additional structures to fix and guide the first spring 42 and the second spring 43, which can effectively reduce the complexity of the installation structure of the multi - stage damping device and improve the production and installation efficiency.

[0045] Figure 6 For the second embodiment of the multi - stage damping device, the difference from the first embodiment is that: the heights of the rubber column 41, the first spring 42 and the second spring 43 are all different. The height of the rubber column is h1, the height of the first spring is h2, and the height of the second spring is h3, where h1>h2>h3. Preferably, h1:h2:h3 = 3:2:1 can be selected. Through the above - designed heights of the rubber column 41, the first spring 42 and the second spring 43, its multi - stage damping effect is better than that of the first embodiment. The primary damping is mainly borne by the higher rubber column. After the vibration further increases, the further participation of the first spring 42 and the second spring 43 can effectively achieve multi - stage damping.

[0046] Figure 7This is the third embodiment of the multi-stage damping device. A lower reinforcing plate 44 is provided at the bottom of the rubber column 41. The lower parts of the rubber column 41, the first spring 42 and the second spring 43 are all fixed on the lower reinforcing plate 44. Preferably, the first spring 42, the second spring 43 and the lower reinforcing plate 44 are all made of metal, and the first spring 42 and the second spring 43 are fixed on the lower reinforcing plate 44 by welding. The setting of the lower reinforcing plate 44 strengthens the bottom surface of the rubber column 41 on the one hand and makes the force evenly distributed on the other hand. On the other hand, it is convenient to fix the lower parts of the first spring 42 and the second spring 43, which is convenient for manufacturing and processing.

[0047] An annular groove is provided at the top of the rubber column 41, and an upper reinforcing ring 45 is provided in the groove. The top surface of the upper reinforcing ring 45 is flush with the upper surface of the rubber column 41. The thickness of the upper reinforcing ring 45 can be selected to be 2-5 mm, and the ratio between the diameter of the rubber column, the outer diameter and the inner diameter of the upper reinforcing ring 45 can be selected as 1:0.8:0.6 according to needs. The upper reinforcing ring 45 can be selected as a metal ring, and the top of the first spring can be fixedly arranged on the upper reinforcing ring 45 according to needs to form further fixed support for the first spring. The design of the groove and the upper reinforcing ring 45 strengthens the top surface strength of the rubber column and makes the force more evenly distributed, while saving materials, facilitating the fixation of the upper reinforcing ring 45, saving costs and improving production efficiency.

[0048] As an option, both the top and bottom of the rubber column 41 can be in the form of a reinforcing plate, or both can be in the form of a groove and a reinforcing ring. The diameter of the reinforcing plate can also be selected to be smaller than the diameter of the rubber column and fixed on the top and bottom of the rubber column 41 in the form of a groove, but the diameter of the reinforcing plate should be larger than the diameter of the first spring 42 to ensure that it can fix and support the first spring 42 and the second spring 43. When the bottom of the rubber column 41 is in the form of a reinforcing ring, the size of the reinforcing ring should be able to cover the first spring 42 and the second spring 43 on the bottom surface to facilitate the fixation and support of the first spring 42 and the second spring 43.

[0049] In summary, the present invention improves the structure of the multi-stage damping device, adopts rubber columns 41, first springs 42 and second springs 43 with different elastic coefficients, and through the design of the heights of the rubber column 41, the first spring 42 and the second spring 43 and the settings of the lower reinforcing plate 44 and the upper reinforcing ring 45, it can effectively achieve multi-stage damping while simplifying the fixing and installation structure. At the same time, the motor installation structure is improved. While facilitating the installation of the multi-stage damping device, through the angle settings of the lower damping device 4 and the upper damping device 5, effective support for the motor and effective damping in the vertical and horizontal directions are realized.

[0050] As described above, it is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A motor mounting structure with a multi-stage shock absorption device. The motor mounting structure mainly includes a base (1), a frame (2), a motor (3), a lower multi-stage shock absorption device (4), and an upper multi-stage shock absorption device (5); the base (1) and the frame (2) form a generally cuboid-shaped frame body (6); the motor (3) is fixed inside the frame body (6) through the lower multi-stage shock absorption device (4) and the upper multi-stage shock absorption device (5). Specifically: four frame lower mounting platforms (7) are provided at the four corners of the lower part of the frame body (6), and four frame upper mounting platforms (8) are provided at the four corners of the upper part; one end of the four lower multi-stage shock absorption devices (4) is supported on the frame body (6) through the frame lower mounting platform (7), and the other end is supported on the motor lower mounting platform (9) provided at the lower part of the motor side; one end of the four upper multi-stage shock absorption devices (5) is supported on the frame body (6) through the frame upper mounting platform (8), and the other end is supported on the motor upper mounting platform (10) provided at the upper part of the motor side; the lower multi-stage shock absorption device (4) and the upper multi-stage shock absorption device (5) respectively include a rubber column (41), a first spring (42), and a second spring (43). Among them, the rubber column (41) is the main body and is cylindrical, and the rubber column (41) has elasticity; the first spring (42) and the second spring (43) are arranged inside the rubber column (41), and the first spring and the second spring are wrapped by the rubber column (41) to form support and guidance for the first spring (42) and the second spring (43), and the rubber column (41), the first spring (42), and the second spring (43) are coaxially arranged; It is characterized in that: The included angle range formed by the center line of the lower multi-stage shock absorption device (4) and the horizontal plane is 60 - 70 degrees, and the included angle range between the center line of the upper multi-stage shock absorption device (5) and the horizontal plane is 30 - 40 degrees; the second spring (43) is arranged inside the first spring (42), and the heights and elastic coefficients of the first spring (42) and the second spring (43) are different; the elastic coefficient of the rubber column (41) is less than the elastic coefficient of the first spring (42); the elastic coefficient of the first spring (42) is less than the elastic coefficient of the second spring (43); the height of the first spring (42) is higher than the height of the second spring (43); The height of the first spring (42) is less than the height of the rubber column (41).

2. The motor mounting structure according to claim 1, characterized in that: First fixing grooves (11) and second fixing grooves (12) are respectively arranged on the frame lower mounting platform (7) and the motor lower mounting platform (9), and both ends of the lower multi-stage shock absorption device (4) are respectively installed in the first fixing groove (11) and the second fixing groove (12).

3. The motor mounting structure according to claim 1, characterized in that: The included angle range formed by the center line of the lower multi-stage shock absorption device (4) and the horizontal plane is 65 degrees, and the included angle range between the center line of the upper multi-stage shock absorption device (5) and the horizontal plane is 35 degrees.

4. The motor mounting structure according to claim 1, wherein: A lower reinforcing plate (44) is arranged at the bottom of the rubber column (41), and the lower parts of the rubber column (41), the first spring (42), and the second spring (43) are all fixed on the lower reinforcing plate (44).

5. The motor mounting structure according to claim 1, characterized in that: An annular groove is arranged at the top of the rubber column (41), and an upper reinforcing ring (45) is arranged in the groove, and the top surface of the upper reinforcing ring (45) is flush with the upper surface of the rubber column (41).

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