An electric drive power unit damping device

Abstract

The present application relates to the technical field of electric drive power unit damping, and specifically discloses an electric drive power unit damping device, which comprises a base, a frame unit, a motor, a battery pack and an electrical unit, the motor is installed on the base, the battery pack and the electrical unit are fixed on the frame unit, the damping device comprises a plurality of elastic damping blocks, the damping device is arranged between the base and the frame unit, the frame unit is supported on the base through the damping device, and the frame unit and the base are connected through the elastic damping blocks to form a soft connection. In the present application, the elastic damping blocks are arranged in an inclined manner, which can not only realize stable support of the elastic damping blocks on the vibration of the whole machine, but also reduce the vibration transmitted to the battery pack and the electrical unit through the anti-vibration effect of the elastic damping blocks, and ensure the compactness and versatility of the whole device. In addition, the damping structure is directly connected with the frame unit and is integrated at the same position of the base, thereby improving the convenience and visibility of disassembly and assembly.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric drive power unit damping, in particular to an electric drive power unit damping device. BACKGROUND

[0002] With the deepening of environmental problems, general power units are shifting from fuel to electrification. Generally, the electric drive power unit is a structure that integrates the motor, driver, battery pack and controller, etc. and makes them integrated. The electric drive power unit is characterized by performance and size almost the same as the traditional fuel engine, and the installation size is also the same, which can replace the fuel engine to provide power to the working machine, so as to be mounted on various working machines. For example, the patent application No. CN201880096866.3 in the prior art discloses an electric power unit and a working machine, which can be mounted on different working machines such as a rammer, a rammer, a mower, a cultivator, a snow remover, etc. to replace the traditional fuel engine to drive the working machine to work.

[0003] In actual application, the vibration generated by some equipment in the working machine mounted with the electric power unit has exceeded the vibration resistance strength of the battery pack, the driver and other electrical elements. The present application proposes a design scheme to meet the use demand of the large vibration working machine. SUMMARY

[0004] In view of the defects in the prior art, the purpose of the present application is to provide an electric drive power unit damping device, which can meet the use demand of the large vibration working machine and can damp the electrical components of the electric drive power unit to avoid equipment damage.

[0005] The technical scheme adopted by the present application is: an electric drive power unit damping device, the electric drive power unit includes a base, a frame unit, a motor and a battery pack and an electrical unit, the motor is installed on the base, the battery pack and the electrical unit are fixed on the frame unit, the damping device includes a plurality of elastic damping blocks, the damping device is arranged between the base and the frame unit, the frame unit is supported on the base through the damping device, the frame unit and the base are connected through the elastic damping blocks to form a soft connection, each elastic damping block is arranged obliquely to the side of the motor, so that the axes of each elastic damping block intersect above the center of gravity of each part of the battery pack and the electrical unit.

[0006] In the technical scheme, the motor is installed on the base, and after the battery pack and the electrical unit above the motor are fixed on the frame unit, the damping mechanism can be arranged above the base structure, thereby greatly reducing the vibration received by the battery pack and the electrical unit when running on the corresponding equipment.

[0007] Specifically, after the battery pack and the electrical unit are fixed on the frame unit, the elastic damping blocks are connected with the base in a soft manner. Since the elastic damping blocks are arranged in an inclined manner, the inclination angle is designed according to the gravity center of the battery pack and the electrical unit during installation design, so that the axes of the elastic damping blocks intersect above the gravity centers of each part of the battery pack and the electrical unit. On the one hand, the elastic damping blocks can stably support the vibration of the whole machine; on the other hand, the vibration transmitted to the battery pack and the electrical unit is reduced through the anti-vibration effect of the elastic damping blocks. In particular, when the working machine running on the power unit generates large vibrations in different directions, the natural vibration frequency of the elastic damping blocks can be designed to be less than 1 / 2 of the vibration frequency of the working machine, so as to reduce the vibration transmission rate to less than 1 / 3, effectively avoiding the damage of the electrical elements on the electric drive power unit due to vibration.

[0008] In addition, compared with the prior art which adopts a base and a frame to be connected, and then uses the frame and a damping mechanism to be connected at multiple connection points, in the present scheme, the damping structure is directly connected with the frame unit and is integrated together at the same position of the base, thereby improving the convenience and visibility of disassembly and assembly.

[0009] The present application can be further improved.

[0010] Further, the upper end of the base is provided with a first mounting portion for mounting a motor, the motor is fixed to the first mounting portion, and second mounting portions are arranged on both sides of the first mounting portion, and a support plate connected with the lower end of the elastic damping block is mounted on the second mounting portions.

[0011] Further, the support plate comprises a lower support portion and a damping lower mounting portion, the lower support portion is detachably fixedly connected with the second mounting portion, the damping lower mounting portion is connected with the lower end of the elastic damping block, and the damping lower mounting portion and the lower support portion have an included angle therebetween.

[0012] Further, the frame unit is provided with connecting plates at both ends, the connecting plates comprise upper connecting portions and damping upper mounting portions, the upper connecting portions are fixed with the frame unit, the damping upper mounting portions are detachably connected with the upper ends of the elastic damping blocks, and the damping upper mounting portions and the upper connecting portions have an included angle therebetween.

[0013] Further, each of the elastic damping blocks is arranged between the support plates and the connecting plates and is arranged along the length direction of the support plates.

[0014] The beneficial effects of the present application are: the present application can install the battery pack and the electrical unit on the frame unit, and then form a soft connection with the base through the elastic damping block, thereby greatly reducing the vibration received by the battery pack and the electrical unit during operation of the corresponding working machine; since the elastic damping block is arranged in an inclined manner, on the one hand, the elastic damping block can stably support the vibration of the whole machine; on the other hand, the vibration transmitted to the battery pack and the electrical unit is reduced through the anti-vibration effect of the elastic damping block, thereby avoiding damage to various electrical elements due to vibration, while ensuring the compactness and versatility of the whole device; in addition, the damping structure in the present application is directly connected with the frame unit and is integrated at the same position of the base, thereby improving the convenience and visibility of disassembly and assembly; and has high practical value and popularization value. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the specific embodiments or prior art description will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual proportion.

[0016] Figure 1 The side view of the electric driving force unit damping device provided for the first embodiment of the present application Figure 1 .

[0017] Figure 2 The side view of the electric driving force unit damping device provided for the first embodiment of the present application Figure 2 .

[0018] Figure 3 The installation schematic view of the electric driving force unit damping device provided for the second embodiment of the present application.

[0019] Figure 4 The installation schematic view of the base and the support plate of the electric driving force unit damping device provided for the second embodiment of the present application.

[0020] Figure 5 The perspective view of the elastic damping block of the electric driving force unit damping device provided for the third embodiment of the present application.

[0021] The drawings show: base 100, first mounting portion 110, second mounting portion 120, motor 200, battery pack and electrical unit 300, support plate 400, lower support portion 410, damping lower mounting portion 420, elastic damping block 500, contact portion 510, plug-in portion 520, limiting portion 530, connecting plate 600, upper connecting portion 610, damping upper mounting portion 620, frame unit 700, battery pack gravity center 800, driver gravity center 900. DETAILED DESCRIPTION

[0022] The embodiments of the technical solutions of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0023] It should be noted that, unless otherwise specified, the terms or words used in the specification and claims should not be interpreted as limited to the usual or dictionary meanings, but should be interpreted based on the principle that the inventor appropriately defines the concept of the terms in order to best explain his own invention in the best way, and only as the meanings and concepts that conform to the technical idea of the present application.

[0024] Embodiment one

[0025] As shown in Figure 1 and Figure 2 , the present embodiment one provides a damping device for an electric drive power unit, the electric drive power unit comprising a base 100, a frame unit 700, a motor 200 and a battery pack and electrical unit 300, the motor 200 being mounted on the base 100, the battery pack and electrical unit 300 being fixed on the frame unit 700, the damping device comprising a plurality of elastic damping blocks 500, the damping device being arranged between the base 100 and the frame unit 700, so that the frame unit 700 is supported on the base 100 through the damping device, the frame unit 700 and the base 100 being connected through the elastic damping blocks 500 to form a soft connection, each elastic damping block 500 being arranged obliquely to the side of the motor 200, so that the axes of the elastic damping blocks 500 intersect above the center of gravity of each part of the battery pack and electrical unit 300.

[0026] As shown in Figure 1 and Figure 2 , through the foregoing arrangement, the motor 200 in the electric drive power unit is mounted on the base 100, and the battery pack and electrical unit 300 can be mounted on the frame unit 700. The battery pack and electrical unit 300 in the present embodiment at least comprises a battery pack, a driver and other electrical components, after the battery pack and electrical unit 300 is fixed on the frame unit 700, a soft connection is formed between the elastic damping blocks 500 of the damping device and the base 100. The damping structure in the present embodiment is directly connected with the frame unit 700 and is integrally formed at the same position of the base 100, which significantly improves the convenience and visibility of disassembly compared with the prior art. Since the elastic damping blocks 500 are arranged obliquely, during installation and design, the oblique angle is designed according to the center of gravity of the battery pack and electrical unit 300, so that the axes of each elastic damping block 500 intersect above the center of gravity of each part of the battery pack and electrical unit 300. As shown in Figure 1As shown, the battery pack gravity center 800 and the driver gravity center 900 are both located in the lower region intersected by the axis of the elastic damping block 500; on the one hand, the elastic damping block 500 can stably support the vibration of the whole machine; on the other hand, the vibration transmitted to the battery pack and the electrical unit 300 can be reduced through the anti-vibration effect of the elastic damping block 500. In particular, when the working machine running on the power unit generates large vibrations in different directions, the natural vibration frequency of the elastic damping block 500 can be designed to be less than 1 / 2 of the vibration frequency of the working machine, so as to realize the effect of reducing the vibration transmission rate to less than 1 / 3, and effectively avoid the damage of the electrical elements on the electric drive power unit due to vibration.

[0027] The elastic damping block 500 in the embodiment is mainly used to absorb vibrations in different directions generated during the operation of the working machine. Those skilled in the art need to select the corresponding damping material according to the actual situation in application. Generally, the material selection of the elastic damping block 500 should refer to the corresponding parameters during the operation of the equipment: including the maximum bearing vibration acceleration of the electric drive power unit, the whole machine vibration frequency (actual measurement) and the whole machine vibration acceleration (actual measurement). Taking the rubber type material as an example, the parameters of the material itself include the rubber attenuation constant, the dynamic ratio, the number of rubbers, etc.

[0028] In actual selection calculation, the following steps are referred to:

[0029] 1. Calculate the vibration transmission rate Tr by the formula , where F is the force transmitted after passing through the rubber, F0 is the whole machine vibration force, a is the maximum bearing vibration acceleration of the motor, and a0 is the whole machine vibration acceleration.

[0030] 2. After determining the vibration transmission rate Tr of the damping system, calculate the vibration frequency ratio λ by the formula , where h is the rubber attenuation constant.

[0031] 3. After determining the vibration frequency ratio λ, calculate the total spring constant kz of the damping system by the formula , where ξ is the whole machine vibration frequency, λ is the vibration frequency ratio, and m is the total mass of the whole machine.

[0032] 4. After determining the rubber selection by the total spring constant, the number of rubbers and the dynamic ratio, determine the rubber inclination angle according to the compression spring constant and the shear spring constant of the rubber.

[0033] After the design is completed, back calculation can be performed to achieve the target. In the drawings of the embodiment, the number of elastic damping blocks 500 arranged on each side of the motor 200 corresponding to the base 100 is two.

[0034] Embodiment Two

[0035] As shown in Figure 3 and Figure 4As shown, the base 100 and the frame unit 700 are further optimized in the embodiment; the first mounting portion 110 is arranged at the upper end of the base 100 and the motor 200 is fixed to the first mounting portion 110. The second mounting portion 120 is arranged at both sides of the first mounting portion 110, and the support plate 400 connected with the lower end of the elastic damping block 500 is mounted on the second mounting portion 120. Through the first mounting portion 110 and the second mounting portion 120, the base 100, the motor 200, the battery pack and the electrical unit 300 are stably mounted. The units are collectively integrated on the base 100, which not only improves the convenience and visibility of disassembly and assembly, but also facilitates the installation of the whole machine on different working machines.

[0036] As shown in Figure 3 and Figure 4 The support plate 400 provided in the embodiment includes a lower support portion 410 and a damping lower mounting portion 420. The lower support portion 410 is detachably fixedly connected with the second mounting portion 120, and the damping lower mounting portion 420 is connected with the lower end of the elastic damping block 500. The damping lower mounting portion 420 and the lower support portion 410 form an included angle. In this way, the support plate 400 can be stably mounted at the position of the second mounting portion 120 of the base 100 through the lower support portion 410, and connected with the lower end of the elastic damping block 500 through the damping lower mounting portion 420. In actual application, since the elastic damping block 500 needs to adjust the inclination angle according to the gravity center of the battery pack and the electrical unit 300, the included angle between the damping lower mounting portion 420 and the lower support portion 410 is subject to actual design. In some embodiments, in order to improve the compactness of the equipment and the application range of the electric drive power unit to replace the oil engine, the height of the support plate 400 at both sides of the base 100 is adjusted as needed. In the embodiment, the support plate 400 at both sides of the base 100 is designed to be high and low to ensure the overall compactness and replaceability of the equipment.

[0037] As shown in Figure 3 and Figure 4As shown, in this embodiment, connecting plates 600 are also provided at both ends of the frame unit 700. The connecting plates 600 include an upper connecting portion 610 and a vibration-damping upper mounting portion 620. The upper connecting portion 610 is fixed to the frame unit 700, and the vibration-damping upper mounting portion 620 is removably connected to the upper end of the elastic vibration-damping block 500. An angle is formed between the upper connecting portion 620 and the upper connecting portion 610. Thus, the upper connecting portion 610 of the connecting plate 600 is fixedly connected to the end of the frame unit 700 and is simultaneously connected to the upper end of the elastic vibration-damping block 500 via the vibration-damping upper mounting portion 620, thereby improving the stability of the vibration-damping mechanism, the battery pack, and the electrical unit 300. In this embodiment, the upper connecting portion 610 of the connecting plate 600 is preferably attached to the frame unit 700 by welding. In actual application, the support plate 400 and the connecting plate 600 are integrally stamped. The materials of the support plate 400 and the connecting plate 600 are selected as needed and are not further described here.

[0038] Example 3

[0039] like Figure 5 As shown, in actual installation applications, each elastic vibration damping block 500 is located between the support plate 400 and the connecting plate 600 and spaced apart along the length of the support plate 400. This embodiment further optimizes the structure of the elastic vibration damping blocks 500. Specifically, each end of the elastic vibration damping block 500 is provided with a conical contact portion 510, the outer diameter of which is larger than the outer diameter of the elastic vibration damping block 500. The provision of the contact portion 510 increases the contact area between the elastic vibration damping block 500, the connecting plate 600, and the support plate 400 during installation, thereby increasing installation stability and reducing noise generated during equipment operation.

[0040] like Figure 5 As shown, in order to ensure the stability of the connection between the elastic vibration damping block 500 and the connecting plate 600 and the support plate 400, the end faces of the contact portion 510 at both ends of the elastic vibration damping block 500 in this embodiment are provided with plug-in portions 520 that can be detachably connected to the vibration damping lower mounting portion 420 and the vibration damping upper mounting portion 620. The elastic vibration damping block 500 can be stably installed by plugging and matching with the connecting plate 600 and the support plate 400 through the plug-in portions 520. To avoid shaking after installation, this embodiment also provides a limiting portion 530 on the edge of the end face of the contact portion 510. The limiting portion 530 can be snapped into the vibration damping lower mounting portion 420 and the vibration damping upper mounting portion 620. In this way, the limiting portion 530 can play a limiting role, further ensuring the stability of the vibration damping mechanism.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit the present application; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the description of the present application.

Claims

1. An electric drive power unit damping device, the electric drive power unit comprising a base (100), a frame unit (700), an electric motor (200) and a battery pack and electrical unit (300), the electric motor (200) being mounted on the base (100), the battery pack and electrical unit (300) being fixed on the frame unit (700), characterized in that the damping device comprises a plurality of elastic damping blocks (500), the damping device being arranged between the base (100) and the frame unit (700) so that the frame unit (700) is supported on the base (100) by the damping device, the frame unit (700) and the base (100) being connected by the elastic damping blocks (500) to form a soft connection, each elastic damping block (500) being arranged obliquely towards the electric motor (200) so that the axes of the elastic damping blocks (500) intersect above the center of gravity of each part of the battery pack and electrical unit (300).

2. The electric drive power unit damping device according to claim 1, characterized in that the base (100) is provided at the upper end with a first mounting portion (110) for mounting the electric motor (200), the electric motor (200) being fixed to the first mounting portion (110), the first mounting portion (110) being provided at both sides with a second mounting portion (120), the second mounting portion (120) being provided with a support plate (400) connected to the lower end of the elastic damping block (500); the support plate (400) comprising a lower support portion (410) and a damping lower mounting portion (420), the lower support portion (410) being detachably fixedly connected to the second mounting portion (120), the damping lower mounting portion (420) being connected to the lower end of the elastic damping block (500), the damping lower mounting portion (420) and the lower support portion (410) having an included angle therebetween.

3. The electric drive power unit damping device according to claim 2, characterized in that the frame unit (700) is provided at both ends with a connecting plate (600), the connecting plate (600) comprising an upper connecting portion (610) and a damping upper mounting portion (620), the upper connecting portion (610) being fixed to the frame unit (700), the damping upper mounting portion (620) being detachably connected to the upper end of the elastic damping block (500), the damping upper mounting portion (620) and the upper connecting portion (610) having an included angle therebetween.

4. The electric drive power unit damping device according to claim 3, characterized in that each elastic damping block (500) is arranged between the support plate (400) and the connecting plate (600) and is arranged along the length direction of the support plate (400) at intervals. ​ ​ ​

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