A damping and noise reduction connecting support for an electric drive axle

Abstract

The application provides a vibration and noise reduction connecting support of an electric drive axle, and belongs to the technical field of electric drive axles. The device comprises a motor end cover, an axle housing base, a four-jaw support, an I-shaped support and a rubber vibration reduction pad. The axle housing base is used for connecting with the electric drive axle. The four-jaw support is arranged on the motor end cover. The I-shaped support is connected with the axle housing base, and the side of the I-shaped support away from the axle housing base has a circular open accommodating cavity. The rubber vibration reduction pad is in contact with the four-jaw support, and is located in the circular open accommodating cavity of the I-shaped support. The device effectively reduces the influence of motor vibration on the electric drive axle through a multi-stage vibration transmission and reduction process. The rubber vibration reduction pad is elastically deformed under vibration. The friction between rubber molecules and the friction between the rubber and the I-shaped support consume vibration energy, convert mechanical energy into heat energy, thereby achieving a vibration reduction effect, reducing the transmission of vibration to the electric drive axle, and reducing noise generated by vibration.

Description

Technical Field

[0001] This application relates to the field of electric drive bridge technology, and more specifically, to a vibration reduction and noise reduction connection bracket for an electric drive bridge. Background Technology

[0002] Electric drive axles are integrated drive systems for electric vehicles (especially commercial vehicles, construction machinery, and mining vehicles). They integrate the motor, reducer, and differential into the axle housing, offering advantages such as compact structure, high transmission efficiency, and high space utilization. With the promotion of new energy policies and the implementation of "dual-carbon" targets, the application of electric drive axles in logistics vehicles, heavy trucks, and off-highway vehicles has increased significantly.

[0003] In the prior art, the motor bracket is integrally stamped from sheet metal and rigidly connected to the motor end cover and the axle housing base by bolts. Vibrations generated by motor excitation and gear meshing impact are directly transmitted to the axle housing through the rigid bracket. Thus, a rigid connection path is formed between the motor, bracket, axle housing and the vehicle body, causing vibration energy to diffuse to the entire vehicle structure.

[0004] Therefore, there is an urgent need for a vibration reduction and noise reduction connection bracket for electric drive bridges. Utility Model Content

[0005] This application aims to address at least one of the technical problems existing in the prior art or related technologies.

[0006] Therefore, this application provides a vibration reduction and noise reduction connection bracket for an electric drive bridge, which can reduce the vibration transmission between the motor and the electric drive bridge.

[0007] The vibration damping and noise reduction connection bracket for the electric drive bridge provided in this application includes a motor end cover, a bridge housing base, a four-jaw bracket, an I-shaped bracket, and a rubber vibration damping pad. The bridge housing base is used to connect to the electric drive bridge; the four-jaw bracket is disposed on the motor end cover; the I-shaped bracket is connected to the bridge housing base, and the side of the I-shaped bracket away from the bridge housing base has a circular open receiving cavity; the rubber vibration damping pad contacts the four-jaw bracket, and the rubber vibration damping pad is located within the circular open receiving cavity of the I-shaped bracket.

[0008] In some embodiments, the four-claw bracket includes: four fixed arms, each fixed arm having a threaded through hole; a central fixing ring, disposed at the axial extension position of the four fixed arms, and the central fixing ring is in contact with the surface of the rubber damping pad, the central fixing ring having a threaded hole inside; and four first bolts, respectively disposed in the threaded through hole of each fixed arm, and each first bolt passing through the corresponding fixed arm and connected to the motor end cover.

[0009] In some embodiments, the four-claw bracket further includes four reinforcing ribs, which are disposed on each of the fixed arms and in contact with the central fixed ring, and each of the reinforcing ribs is triangular.

[0010] In some embodiments, the I-type bracket has two threaded through holes for accommodating a second bolt, which passes through the I-type bracket and is connected to the bridge housing base.

[0011] In some embodiments, the device further includes: two gaskets symmetrically arranged on both sides of the rubber damping pad; and a third bolt inserted into the rubber damping pad and connected to the threaded hole of the central fixing ring.

[0012] In some embodiments, the four-claw support is an integral structure.

[0013] In some embodiments, the rubber vibration damping pad is cylindrical, with its two sides contacting the central fixing ring and the I-shaped bracket respectively, and the pad is located between the contact surfaces.

[0014] In some embodiments, both the four-claw bracket and the I-type bracket are made of alloy steel.

[0015] Compared with the prior art, the technical solution provided in this application includes at least the following technical effects: This application provides a vibration-damping and noise-reducing connection bracket for an electric drive bridge, which can reduce the vibration transmission between the motor and the electric drive bridge. During motor operation, vibrations are generated and transmitted through the motor end cover. The four-claw bracket connected to the motor end cover receives these vibrations and further transmits them to rubber damping pads. When subjected to vibration, the rubber damping pads undergo elastic deformation. Friction between rubber molecules and between the rubber and the I-type bracket consumes vibration energy, converting mechanical energy into heat energy, thereby achieving a vibration reduction effect. After being damped by the rubber damping pads, the remaining vibration is transmitted to the I-type bracket, which then transmits the vibration to the bridge housing base, and finally to the electric drive bridge. Through this multi-stage vibration transmission and damping process, the impact of motor vibration on the electric drive bridge is effectively reduced. The rubber damping pads can effectively absorb and consume the vibration energy generated during motor operation, greatly reducing the transmission of vibration to the electric drive bridge, thereby reducing noise caused by vibration.

[0016] Additional aspects and advantages of this application will become apparent in the following description or may be learned by practice of this application. Attached Figure Description

[0017] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1This is a schematic diagram of the overall structure of the connecting bracket according to some embodiments of this application; Figure 2 Exploded views of the connecting brackets of some embodiments of this application; Figure 3 This is a schematic diagram of the structure of the connecting bracket according to some embodiments of this application; Figure 4 This is a schematic diagram of the structure of a four-claw bracket according to some embodiments of this application.

[0018] in, Figures 1 to 4 The correspondence between the reference numerals and component names in the attached drawings is as follows: 1. Motor end cover; 2. Bridge housing base; 3. Four-claw bracket; 31. Fixing arm; 32. Central fixing ring; 33. Reinforcing rib; 34. First bolt; 4. I-type bracket; 41. Second bolt; 5. Rubber vibration damping pad; 51. Shim; 52. Third bolt. Detailed Implementation

[0019] To better understand the above-mentioned objectives, features, and advantages of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0020] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0021] The following reference Figures 1 to 4 This application describes a vibration-damping and noise-reducing connection bracket for an electric drive bridge provided according to some embodiments.

[0022] like Figure 1 As shown, a vibration damping and noise reduction connection bracket for an electric drive bridge provided according to some embodiments of this application includes a motor end cover 1, a bridge housing base 2, a four-jaw bracket 3, an I-shaped bracket 4, and a rubber vibration damping pad 5. The bridge housing base 2 is used to connect to the electric drive bridge; the four-jaw bracket 3 is disposed on the motor end cover 1; the I-shaped bracket 4 is connected to the bridge housing base 2, and the side of the I-shaped bracket 4 away from the bridge housing base 2 has a circular open receiving cavity; the rubber vibration damping pad 5 contacts the four-jaw bracket 3, and the rubber vibration damping pad 5 is located within the circular open receiving cavity of the I-shaped bracket 4.

[0023] In this embodiment, vibrations are generated during motor operation. These vibrations are transmitted through the motor end cover 1, and the four-claw bracket 3 connected to the motor end cover 1 receives the vibrations and further transmits them to the rubber damping pad 5. When subjected to vibration, the rubber damping pad 5 undergoes elastic deformation. The friction between rubber molecules and between the rubber and the I-type bracket 4 consumes vibration energy, converting mechanical energy into heat energy, thereby achieving a vibration reduction effect. After the vibration is reduced by the rubber damping pad 5, the remaining vibration is transmitted to the I-type bracket 4, which then transmits the vibration to the bridge housing base 2, and finally to the electric drive bridge. Through the multi-stage vibration transmission and damping process, the impact of motor vibration on the electric drive bridge is effectively reduced.

[0024] In this design, the rubber vibration damping pad 5 can effectively absorb and consume the vibration energy generated during motor operation, greatly reducing the transmission of vibration to the electric drive bridge, thereby reducing the noise caused by vibration.

[0025] In some possible embodiments, such as Figure 4 As shown, the four-claw bracket 3 includes: four fixed arms 31, each fixed arm 31 having a threaded through hole; a central fixing ring 32, which is located at the axial extension position of the four fixed arms 31, and the central fixing ring 32 is in contact with the surface of the rubber damping pad 5, and the central fixing ring 32 has a threaded hole inside; and four first bolts 34, which are respectively located in the threaded through hole of each fixed arm 31, and each first bolt 34 passes through the corresponding fixed arm 31 and is connected to the motor end cover 1.

[0026] In this embodiment, four fixed arms 31 are symmetrically and evenly distributed on the outside of the central fixed ring 32 in a cross-shaped layout. When assembling the four-jaw bracket 3, the threaded through holes of the four-jaw bracket 3 correspond to the mounting holes of the motor end cover 1. The four first bolts 34 are inserted into the corresponding holes and tightened one by one, so that the four-jaw bracket 3 is firmly fixed on the motor end cover 1. The surface of the rubber vibration damping pad 5 is in contact with the central fixed ring 32, which can accurately transmit the vibration and force transmitted by the motor end cover 1 to the rubber vibration damping pad 5.

[0027] In some possible embodiments, such as Figure 4 As shown, the four-claw bracket 3 also includes four reinforcing ribs 33, which are respectively disposed on each fixed arm 31 and in contact with the central fixed ring 32, and each reinforcing rib 33 is triangular.

[0028] In this embodiment, the triangular reinforcing rib 33 has high structural stability and can effectively disperse stress. When the motor is running, vibration and force are transmitted to the fixed arm 31 of the four-claw bracket 3 through the motor end cover 1. Since the reinforcing rib 33 is connected to the fixed arm 31 and the central fixing ring 32, it can disperse and redistribute the force on the fixed arm 31. When one of the fixed arms 31 is subjected to a large vertical downward force, the reinforcing rib 33 will transmit part of the force along its own structure to the central fixing ring 32, while dispersing another part of the force to the adjacent fixed arm 31. This force dispersion and redistribution process enables the entire four-claw bracket 3 to bear the load more evenly, avoid local stress concentration, resist the bending deformation of the bracket, and enable the bracket to quickly return to its original shape after being subjected to force, thus ensuring the accurate transmission of vibration and force, thereby improving the performance of the entire vibration reduction and noise reduction connection bracket.

[0029] In some possible embodiments, such as Figure 3 As shown, the type I bracket 4 has two threaded through holes for accommodating the second bolt 41, and the second bolt 41 passes through the type I bracket 4 and is connected to the bridge housing base 2.

[0030] In this embodiment, the second bolt 41 is inserted into the threaded through hole on the I-type bracket 4 and tightened. At this time, the end of the second bolt 41 will be connected to the corresponding threaded hole on the bridge housing base 2. The thread of the second bolt 41 and the thread of the threaded hole generate friction. This friction can prevent the second bolt 41 from loosening or sliding during use, ensuring that the I-type bracket 4 and the bridge housing base 2 are firmly connected.

[0031] In some possible embodiments, such as Figure 2 As shown, it also includes: two gaskets 51, symmetrically arranged on both sides of the rubber damping pad 5; a third bolt 52, which passes through the rubber damping pad 5 and is connected to the threaded hole of the central fixing ring 32; the rubber damping pad 5 is cylindrical, and its two sides are in contact with the central fixing ring 32 and the I-type bracket 4 respectively, and there are gaskets 51 between the contact surfaces.

[0032] In this embodiment, during the long-term operation of the electric drive bridge, the frequent friction between the rubber vibration damping pad 5 and the central fixing ring 32 and the I-type bracket 4 will cause wear on the contact surface, affecting the tightness and stability of the connection of the structure. A shim 51 is added at the contact surface. The shim 51 has good wear resistance and can effectively reduce the wear, thereby ensuring the flatness and fit of the contact surface. The third bolt 52 is inserted from one side of the rubber vibration damping pad 5, so that its end is aligned with the threaded hole on the central fixing ring 32 and tightened to realize the connection and installation between the rubber vibration damping pad 5 and the four-jaw bracket 3.

[0033] In some possible embodiments, such as Figure 4 As shown, the four-claw support 3 is an integrated structure.

[0034] In this embodiment, the metal fibers of the integrated structure are continuously distributed without any weak links caused by the connection, which can withstand greater loads and better absorb and disperse energy when subjected to impact, making it less prone to brittle fracture. At the same time, it reduces the possibility of corrosive media entering the interior of the support, thereby improving the corrosion resistance of the four-claw support 3.

[0035] In some embodiments, both the four-claw bracket 3 and the I-type bracket 4 are made of alloy steel.

[0036] In this embodiment, due to the high strength properties of alloy steel, the four-claw bracket 3 and the I-type bracket 4 can withstand a large load, thus improving their service life.

[0037] When the vibration reduction and noise reduction connection bracket of the electric drive bridge is in operation, the motor generates vibration, which is transmitted to the motor end cover 1. The four-jaw bracket 3 set on the motor end cover 1 receives the vibration from the motor end cover 1. The four-jaw bracket 3 is firmly connected to the motor end cover 1 through the threaded through holes on the four fixed arms 31 using the first bolt 34, ensuring that the vibration can be accurately transmitted. At the same time, the four-jaw bracket 3 is an integrated alloy steel structure, which can better withstand and transmit vibration, and its central fixed ring 32 is in contact with the surface of the rubber vibration damping pad 5, which can further transmit the vibration. The rubber vibration damping pad 5 is located in the circular open receiving cavity of the I-type bracket 4 and is in contact with the four-jaw bracket 3. When it receives the vibration transmitted by the four-jaw bracket 3, the rubber vibration damping pad 5 undergoes elastic deformation. The friction between rubber molecules and the friction between rubber and the I-type bracket 4 consumes the vibration energy, converting mechanical energy into heat energy, achieving the first-level vibration reduction effect. After the vibration is damped by the rubber vibration damping pad 5, the remaining vibration is transmitted to the I-type bracket 4. The I-type bracket 4 is connected to the bridge housing base 2 through the threaded through holes on it using the second bolt 41, and then... The vibration is transmitted to the bridge housing base 2 and ultimately to the electric drive bridge. Through a multi-stage vibration transmission and damping process, the impact of motor vibration on the electric drive bridge is effectively reduced. Simultaneously, each fixed arm 31 of the four-jaw bracket 3 is equipped with a triangular reinforcing rib 33, which contacts the central fixing ring 32. When the motor is running, vibration and force are transmitted through the motor end cover 1 to the fixed arm 31 of the four-jaw bracket 3. The reinforcing rib 33 disperses and redistributes the force on the fixed arm 31, avoiding localized stress concentration, resisting bending deformation of the bracket, and ensuring the effective transmission of vibration and force. The accurate transmission of vibration is achieved by symmetrically placing shims 51 on both sides of the rubber vibration damping pad 5. The shims 51 have good wear resistance and can effectively reduce the wear of the contact surface caused by frequent friction between the rubber vibration damping pad 5 and the central fixing ring 32 and the I-type bracket 4 during the long-term operation of the electric drive bridge, ensuring the flatness and fit of the contact surface. The connecting bracket effectively reduces the impact of motor vibration on the electric drive bridge and reduces the noise caused by vibration through the multi-stage vibration transmission and damping process of the four-jaw bracket 3, the rubber vibration damping pad 5 and the I-type bracket 4.

[0038] In this application, it should be noted that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0039] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0040] In this application, unless otherwise expressly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. The term "multiple" refers to two or more, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0041] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0042] In this application, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0043] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A vibration-damping and noise-reducing connection bracket for an electric drive bridge, characterized in that, include: Motor end cover; Bridge housing base, used for connection with electric drive bridge; A four-claw bracket is mounted on the motor end cover; The type I bracket is connected to the bridge housing base, and the side of the type I bracket away from the bridge housing base has a circular open receiving cavity; The rubber vibration damping pad is in contact with the four-claw bracket, and the rubber vibration damping pad is located in the circular open receiving cavity of the I-type bracket.

2. The vibration reduction and noise reduction connection bracket for the electric drive bridge according to claim 1, characterized in that, The four-claw support includes: Four fixing arms, each of which has a threaded through hole; A central fixing ring is located at the axial extension position of the four fixing arms, and the central fixing ring is in contact with the surface of the rubber damping pad. The central fixing ring has a threaded hole inside. Four first bolts are respectively disposed in the threaded through holes of each of the fixed arms, and each first bolt passes through the corresponding fixed arm and is connected to the motor end cover.

3. The vibration reduction and noise reduction connection bracket for the electric drive bridge according to claim 2, characterized in that, The four-claw support also includes: Four reinforcing ribs are respectively disposed on each of the fixed arms and in contact with the central fixed ring, and each of the reinforcing ribs is triangular.

4. The vibration reduction and noise reduction connection bracket for the electric drive bridge according to claim 1, characterized in that: The type I bracket has two threaded through holes for accommodating a second bolt, which passes through the type I bracket and is connected to the bridge housing base.

5. The vibration reduction and noise reduction connection bracket for the electric drive bridge according to claim 2, characterized in that, Also includes: Two pads are symmetrically arranged on both sides of the rubber vibration damping pad; The third bolt passes through the rubber damping pad and is connected to the threaded hole of the central fixing ring.

6. The vibration reduction and noise reduction connection bracket for the electric drive bridge according to claim 1, characterized in that: The four-claw support is an integrated structure.

7. The vibration reduction and noise reduction connection bracket for the electric drive bridge according to claim 5, characterized in that: The rubber vibration damping pad is cylindrical, with its two sides in contact with the central fixing ring and the I-shaped bracket, respectively, and the pad is located between the contact surfaces.

8. The vibration reduction and noise reduction connection bracket for the electric drive bridge according to claim 1, characterized in that: Both the four-claw bracket and the type I bracket are made of alloy steel.

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