Multi-stage damping device and motor mounting structure

Abstract

The invention provides a multi-stage damping device and a motor mounting structure, the multi-stage damping device comprises a rubber column, a first spring and a second spring, the rubber column is a main body and is cylindrical, and the rubber column has elasticity; the first spring and the second spring are arranged in the rubber column, the rubber column, the first spring and the second spring are coaxial, the second spring is arranged in the first spring, and the first spring and the second spring are different in height and elastic coefficient; the motor mounting structure mainly comprises a base, a frame, a motor, a lower multi-stage damping device and an upper multi-stage damping device. The motor is fixed in a frame body formed by the base and the frame through the lower multi-stage damping device and the upper multi-stage damping device; according to the multi-stage damping device, the first spring and the second spring can be supported and guided, the complexity of the mounting structure of the multi-stage damping device is effectively reduced, and the production and mounting efficiency is improved.

Description

Technical Field

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

[0002] With the rapid development of new energy in my country, electric vehicles are becoming more and more popular. Electric vehicles use power batteries as their main driving energy and are driven by motors. They do not consume fuel and can achieve zero pollutant emissions. With the popularity of electric vehicles, companies and consumers have higher and higher requirements for the performance of electric vehicles.

[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 car, it is prone to bumps during driving, causing the motor to vibrate. In addition, when the electric vehicle is running, the motor rotates at high speed. During the rotation of the rotor, it will vibrate and easily resonate due to the influence of its own tooth torque, electromagnetic force and other excitations. On the one hand, the vibration generated by the motor will cause increased noise, and the motor will be easily damaged by long-term vibration, thereby reducing the service life of the brushless motor; on the other hand, the vibration generated by the motor will be transmitted to the car frame in contact with it, and then to the car body and seats, which may eventually affect the driving or riding comfort of the driver and passengers.

[0004] Although vibration reduction devices have been used to reduce vibration of motors in the prior art, the existing vibration reduction devices cannot simply achieve multi-stage vibration reduction and have a complex installation structure, which leads to many problems such as poor vibration reduction effect, high production cost, and inconvenient installation.

[0005] Since automobile motors generate vibrations of different types and intensities during use, the characteristics of multi-stage vibration reduction structures can effectively reduce the vibration of automobile motors compared to single-stage vibration reduction structures. However, in the prior art, two or more different forms of vibration reduction structures are usually used in parallel to achieve multi-stage vibration reduction, or a spring group with different lengths and elastic coefficients connected inside and outside is used to achieve multi-stage vibration reduction. However, when these multi-stage vibration reduction structures are applied to motor mounting structures, due to the limitations of their own structures, a more complicated fixing method is required, which is not easy to install, and the vibration reduction effect is not ideal.

[0006] In view of this, it is indeed necessary to make a further improvement to 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 to improve production efficiency and reduce production costs. Summary of the invention

[0007] In order to solve the above technical problems, the present invention provides a multi-stage shock absorbing device and a motor mounting structure. Through the improved multi-stage shock absorbing structure, multi-stage vibration reduction is realized simply and effectively. At the same time, through the improvement of the motor mounting structure, effective vibration reduction and installation and fixation of the motor are realized, thereby improving efficiency and reducing costs.

[0008] In order to achieve the above-mentioned purpose, the present invention provides a multi-stage shock absorbing device, including a rubber column, a first spring and a second spring, wherein 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 arranged coaxially, 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 smaller than the elastic coefficient of the first spring; the elastic coefficient of the first spring is smaller 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 smaller than the height of the rubber column.

[0011] Furthermore, a lower reinforcing plate is provided 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 reinforcing plate.

[0012] Furthermore, an annular groove is arranged on the top of the rubber column, 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 a multi-stage vibration damping device, which mainly includes a base, a frame, a motor, a lower multi-stage vibration damping device and an upper multi-stage vibration damping device; the base and the frame form a roughly rectangular frame; the motor is fixed inside the frame through the lower multi-stage vibration damping device and the upper multi-stage vibration damping device.

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

[0015] Furthermore, a first fixing groove and a second fixing groove are respectively provided on the lower mounting platform of the frame and the lower mounting platform of the motor, and two ends of the lower multi-stage vibration reduction device are respectively installed in the first fixing groove and the second fixing groove.

[0016] Furthermore, the angle formed by the center line of the lower vibration damping device and the horizontal plane is in the range of 60-70 degrees, and the angle formed by the center line of the upper vibration damping device and the horizontal plane is in the range of 30-40 degrees.

[0017] Furthermore, the angle formed by the center line of the lower vibration damping device and the horizontal plane is in the range of 65 degrees, and the angle formed by the center line of the upper vibration damping device and the horizontal plane is in the range of 35 degrees.

[0018] Based on the above design, the present invention has the following beneficial effects: First, the multi-stage vibration reduction device of the present invention wraps the first spring and the second spring by the rubber column, which can support and guide the first spring and the second spring. During installation, no additional structure is needed 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 vibration reduction device and improve the production and installation efficiency. At the same time, the height and elastic coefficient of the rubber column, the first spring and the second spring are designed to improve the effect of multi-stage vibration reduction. The setting of the lower reinforcing plate 44, on the one hand, strengthens the bottom surface of the rubber column 41 and achieves the effect of uniform force; on the other hand, it is convenient to fix the lower part of the first spring 42 and the second spring 43, which is convenient for manufacturing and processing. Since there is no spring on the top of the rubber column 41, the design of the upper reinforcing ring 45 is adopted at this time. While strengthening the strength of the top surface of the rubber column and making the force more uniform, it also facilitates the fixing of the upper reinforcing ring 45, which can save costs and improve production efficiency.

[0019] Second, the multi-stage vibration reduction device of the present invention is provided with a lower reinforcement plate and an upper reinforcement ring, which on the one hand reinforces the bottom and top surfaces of the rubber column to achieve uniform force, and at the same time is convenient for fixing the lower parts of the first spring and the second spring, facilitating manufacturing and processing, saving costs and improving production efficiency.

[0020] Third, the motor mounting structure of the present invention effectively fixes the motor inside the frame and realizes multi-stage vibration reduction through four lower multi-stage vibration reduction devices and four upper multi-stage vibration reduction devices. By selecting the angle between the center line of the lower vibration reduction device and the upper vibration reduction device and the horizontal plane, the motor can be effectively supported and the vibration of the motor in the vertical direction and the horizontal direction can be effectively attenuated. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific implementation methods or the description of the prior art. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1It is a structural schematic diagram of the motor installation structure of the present invention; Figure 2 It is a front view of the motor installation structure of the present invention; Figure 3 It is a side view of the motor mounting structure of the present invention; Figure 4 It is a cross-sectional view of the installation of the lower multi-stage vibration reduction device in the motor installation structure of the present invention; Figure 5 It is a structural schematic diagram of a first embodiment of a multi-stage vibration reduction device of the present invention; Figure 6 It is a structural schematic diagram of a second embodiment of the multi-stage vibration reduction device of the present invention; Figure 7 It is a schematic structural diagram of the third embodiment of the multi-stage vibration reduction device of the present invention.

[0023] 1. Base; 2. Frame; 3. Motor; 4. Lower vibration damping device; 5. Upper vibration damping device; 6. Frame; 7. Frame lower mounting platform; 8. Frame upper mounting platform; 9. Motor lower mounting platform; 10. Motor upper mounting platform; 11. First mounting slot; 12. Second mounting slot; 41. Rubber column; 42. First spring; 43. Second spring; 44. Lower fixing plate; 45. Upper reinforcing ring. DETAILED DESCRIPTION

[0024] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0025] The following describes the embodiments 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. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. The present invention can also be implemented or applied through other different specific embodiments, 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 following embodiments and features in the embodiments can be combined with each other without conflict. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0026] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. 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, it should be understood by those skilled in the art that an 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 aspect described herein can be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this device and / or practice this method.

[0027] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention. The drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0028] Additionally, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the examples can be practiced without these specific details.

[0029] At the same time, in this specification, descriptions involving orientations, such as up, down, left, right, front, back, inside, outside, longitudinal, lateral, vertical, horizontal, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0030] Furthermore, in the description of this specification, it should be noted that, unless otherwise clearly specified and limited, the terms "install", "connect" and "connect" should be understood in a broad sense.

[0031] Figure 1 The figure shows a schematic diagram of the structure of the motor installation structure of the present invention, which mainly includes a base 1, a frame 2, a motor 3, a lower multi-stage vibration reduction device 4 and an upper multi-stage vibration reduction device 5. The base 1 and the frame 2 form a roughly rectangular frame 6, and the motor 3 is fixed inside the frame through the lower multi-stage vibration reduction device 4 and the upper multi-stage vibration reduction device 5. The base 1 is a roughly rectangular structure, and 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 horizontal beams, and the four corners of the frame are fixedly connected to the tops of the four vertical beams.

[0032] Combined with Figure 2 and 3It can be seen that four lower frame mounting platforms 7 are provided at the four lower corners of the frame 6, and four upper frame mounting platforms 8 are provided at the four upper corners. One end of the four lower multi-stage vibration reduction devices 4 is supported on the frame 6 through the lower frame 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 vibration reduction devices 5 is supported on the frame 6 through the upper frame 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. Through the four lower multi-stage vibration reduction devices 4 and the four upper multi-stage vibration reduction devices 5, the motor is effectively fixed inside the frame 6 and multi-stage vibration reduction is achieved.

[0033] See also Figure 2 , the angle between the center line of the lower vibration damping device 4 and the horizontal plane is θ1, and the angle between the center line of the upper vibration damping device 5 and the horizontal plane is θ2, wherein the range of θ1 is 60-70 degrees, and the range of θ2 is 30-40 degrees. Since the motor is subject to gravity, its gravity will be mainly supported by the lower vibration damping device 4. The range of the angle θ1 between the center line of the lower vibration damping device 4 and the horizontal plane is designed to be 60-70 degrees, which can effectively support the motor and effectively attenuate the vibration in the vertical direction, and also have a certain attenuation effect on the vibration in the horizontal direction. The range of the angle θ2 between the center line of the upper vibration damping device 4 and the horizontal plane is designed to be 30-40 degrees, which can be used to effectively attenuate the vibration in the horizontal direction. The center lines of the lower vibration damping device 4 and the upper vibration 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 vibration damping device 4 and the upper vibration damping device 5 can be at a certain angle with the vertical plane perpendicular to the motor axis, thereby attenuating the vibration in the direction of the motor axis.

[0034] Figure 4 This is a cross-sectional view of the installation of a lower multi-stage vibration reduction 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 vibration reduction device 4 are respectively installed in the first fixing groove 11 and the second fixing groove 12, thereby realizing the effective installation and fixation of the multi-stage vibration reduction device. The specific installation structure of the upper multi-stage vibration reduction device is the same as the above structure, and will not be repeated here.

[0035] Figure 5-7 Shown are three embodiments of the multi-stage vibration reduction device in the motor mounting structure of the present invention.

[0036] See also Figure 5In the first embodiment, the multi-stage vibration reduction 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 vibration reduction device is cylindrical as a whole. 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 arranged coaxially, and the second spring 43 is arranged inside the first spring 42. The height and elastic coefficient of the first spring 42 and the second spring 43 are different, wherein the height of the first spring 42 is higher than the height of the second spring 43, but the elastic coefficient of the first spring 42 is lower than the elastic coefficient of the second spring 43. The rubber column 41 is also elastic, and the elastic coefficient of the rubber column 41 is lower than the elastic coefficient of the first spring 42. Among them, the height of the rubber column 41 and the first spring 42 is the same, both are h1; the height of the second spring 43 is h2. The height h1 of the rubber column 41 and the first spring 42 is greater than the height h2 of the second spring 43. As a preference, 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 to be 1:1.5, or other values ​​can be selected according to the needs of actual application.

[0037] 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 vibration reduction is formed. At the same time, the rubber column 41 wraps the first spring 42 and the second spring 43, which can support and guide the first spring 42 and the second spring 43. During installation, it is not necessary to adopt another structure 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 vibration reduction device and improve production and installation efficiency.

[0038] Figure 6 This is the second embodiment of the multi-stage vibration reduction device, which is different from the first embodiment in 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, wherein h1>h2>h3. Preferably, h1:h2:h3=3:2:1 can be selected. Through the design of the heights of the rubber column 41, the first spring 42 and the second spring 43, the multi-stage vibration reduction effect is better than that of the first embodiment. The primary vibration reduction is mainly borne by the higher rubber column. After the vibration is further increased, the further participation of the first spring 42 and the second spring 43 can effectively achieve multi-stage vibration reduction.

[0039] Figure 7This is the third embodiment of the multi-stage vibration reduction 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. The first spring 42 and the second spring 43 are fixed on the lower reinforcing plate 44 by welding. The provision of the lower reinforcing plate 44, on the one hand, strengthens the bottom surface of the rubber column 41 and achieves a uniform force effect; 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.

[0040] An annular groove is provided at the top of the rubber column 41, and an upper reinforcing ring 45 is provided in the groove, and 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 and the outer diameter and inner diameter of the upper reinforcing ring 45 can be selected to be 1:0.8:0.6 as required. The upper reinforcing ring 45 can be selected as a metal ring, and the top of the first spring can be fixed on the upper reinforcing ring 45 as required to form further fixed support for the first spring. The design of the groove and the upper reinforcing ring 45 can save materials while strengthening the top surface strength of the rubber column and making the force more uniform, and also facilitate the fixing of the upper reinforcing ring 45, which can save costs and improve production efficiency.

[0041] As an option, the top and bottom of the rubber column 41 can both be in the form of a reinforcing plate, or 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 to 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, so as 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, so as to fix and support the first spring 42 and the second spring 43.

[0042] In summary, the present invention improves the structure of the multi-stage vibration reduction device, adopts rubber columns 41, first springs 42 and second springs 43 with different elastic coefficients, and through the design of the height of the rubber columns 41, first springs 42 and second springs 43 and the setting of the lower reinforcing plate 44 and the upper reinforcing ring 45, it can effectively achieve multi-stage vibration reduction, 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 vibration reduction device, further through the angle setting of the lower vibration reduction device 4 and the upper vibration reduction device 5, effective support for the motor and effective vibration reduction in the vertical and horizontal directions are achieved.

[0043] The above is only a specific embodiment 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 a person skilled in the art within the technical scope disclosed by the present invention should be included in 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 multi-stage shock absorbing device, comprising a rubber column (41), a first spring (42) and a second spring (43), wherein the rubber column (41) is a 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), so as 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 arranged coaxially; characterized in that: The second spring (43) is arranged inside the first spring (42), and the first spring (42) and the second spring (43) have different heights and elastic coefficients; The elastic coefficient of the rubber column (41) is smaller than the elastic coefficient of the first spring (42); the elastic coefficient of the first spring (42) is smaller than the elastic coefficient of the second spring (43); and the height of the first spring (42) is higher than the height of the second spring (43).

2. The multi-stage shock absorbing device according to claim 1, characterized in that: The height of the first spring (42) is equal to the height of the rubber column (41).

3. The multi-stage shock absorbing device according to claim 1, characterized in that: The height of the first spring (42) is smaller than the height of the rubber column (41).

4. The multi-stage shock absorbing device according to claim 2 or 3, characterized in that: A lower reinforcing plate (44) is provided 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 multi-stage shock absorbing device according to claim 3, characterized in that: An annular groove is provided at the top of the rubber column (41), an upper reinforcement ring (45) is provided in the groove, and the top surface of the upper reinforcement ring (45) is flush with the upper surface of the rubber column (41).

6. A motor mounting structure using the multi-stage vibration reduction device according to any one of claims 1 to 5, the motor mounting structure mainly comprising a base (1), a frame (2), a motor (3), a lower multi-stage vibration reduction device (4) and an upper multi-stage vibration reduction device (5); the base (1) and the frame (2) form a substantially rectangular parallelepiped frame (6); characterized in that: The motor (3) is fixed inside the frame (6) via a lower multi-stage vibration reduction device (4) and an upper multi-stage vibration reduction device (5).

7. The motor mounting structure according to claim 6, characterized in that: Four lower frame mounting platforms (7) are arranged at the four lower corners of the frame body (6), and four upper frame mounting platforms (8) are arranged at the four upper corners; one end of the four lower multi-stage vibration reduction devices (4) is supported on the frame body (6) through the lower frame mounting platform (7), and the other end is supported on the lower motor mounting platform (9) arranged at the lower part of the motor side; one end of the four upper multi-stage vibration reduction devices (5) is supported on the frame body (6) through the upper frame mounting platform (8), and the other end is supported on the upper motor mounting platform (10) arranged at the upper part of the motor side.

8. The motor mounting structure according to claim 7, characterized in 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 two ends of the lower multi-stage vibration reduction device (4) are respectively mounted in the first fixing groove (11) and the second fixing groove (12).

9. The motor mounting structure according to claim 6, characterized in that: The included angle formed by the center line of the lower vibration damping device (4) and the horizontal plane is in the range of 60-70 degrees, and the included angle formed by the center line of the upper vibration damping device (5) and the horizontal plane is in the range of 30-40 degrees.

10. The motor mounting structure according to claim 9, characterized in that: The included angle range between the center line of the lower vibration damping device (4) and the horizontal plane is 65 degrees, and the included angle range between the center line of the upper vibration damping device (5) and the horizontal plane is 35 degrees.

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