Motor protection plate of electric drive axle

Abstract

The motor protection plate of the electric drive axle is simple in structure, convenient to disassemble and assemble, high in adaptability, high in structural strength and capable of improving the anti-impact strength. The lower protective plate comprises a lower protective plate body, a left support and a right support are symmetrically arranged at the upper end of the lower protective plate body, the left support and the right support are each of an L-shaped structure, first connecting holes are formed in the bottom edge of the left support and the bottom edge of the right support, second connecting holes matched with the first connecting holes are formed in the lower protective plate body, and the lower protective plate body is fixedly connected with the lower protective plate body. The first connecting holes are connected with the second connecting holes through bolts, mounting holes are formed in the vertical edge of the left support and the vertical edge of the right support, and the mounting holes are connected with an external motor mounting plate through bolts. The utility model is applied to the technical field of vehicle structures.

Description

TECHNICAL FIELD

[0001] The utility model is applied to the technical field of vehicle structure, and particularly relates to a motor guard plate of electric drive axle. BACKGROUND

[0002] In recent years, electric drive axle has shown broad application prospects in the field of passenger cars due to its high efficiency, lightweight, low overall cost, strong adaptability and mature technology. After pure electric buses adopt electric drive axle to replace the traditional central direct drive system, the rear suspension length can be greatly reduced and the wheelbase can be increased. This change in the structure of the vehicle interior space can effectively increase the standing area inside the vehicle, increase the passenger capacity, and improve the efficiency of bus operation.

[0003] The electric drive axle integrates the motor, the reduction gearbox and the drive axle, and has a compact structure and light weight. In order to ensure that the drive axle has a certain structural strength, the material of the reduction gearbox shell and the axle shell of the drive axle is generally cast iron or cast steel. The motor shell needs to be designed with a cooling water channel, and the structure is relatively complex. In combination with the lightweight design requirement, the material of the motor shell is generally aluminum alloy.

[0004] Since the electric drive axle is arranged close to the ground, sand and stones splashed by the road surface during vehicle driving will continuously impact the lower surface of the electric drive axle. Especially when the vehicle is driving on an unpaved road, hard objects on the ground may also hit the electric drive axle. Steel has high strength and high hardness, and can better disperse and absorb energy when impacted, thereby reducing damage and deformation, so the iron axle shell and the reduction gearbox shell are not easy to fail when impacted by hard objects. Aluminum alloy has relatively low strength and hardness, and poor impact resistance, and is prone to cracking when subjected to a large impact. Therefore, the aluminum alloy shell of the motor is likely to crack and structurally damaged when impacted by splashed sand and stones or hit by hard objects.

[0005] Since the domestic paved road coverage rate is high, and the market coverage rate of the current electric drive axle is also slowly rising, the above problems have not been paid attention to. In the currently available electric drive axle installation cases on the market, no manufacturer has designed a protective device for the motor.

[0006] A chassis guard plate structure is disclosed in Chinese Patent No. CN215706103U, which protects the chassis by a large flat chassis guard plate. The chassis is in a relatively closed space. Since the specification of the chassis guard plate is large, a corresponding mounting hole needs to be provided in the vehicle bottom, which has poor compatibility and is difficult to disassemble. At the same time, it is not conducive to heat dissipation or drainage, so it is necessary to provide a motor guard plate for electric drive axle, which has a simple structure, is easy to disassemble and assemble, has high adaptability, high structural strength, and improves the impact resistance. UTILITY MODEL CONTENTS

[0007] The utility model wants to solve the technical problem of overcoming prior art's insufficient, provide a motor protection plate of electric drive bridge, simple structure, convenient to dismount, high adaptability, high structural strength, improve the anti -impact strength.

[0008] The utility model employs the technical scheme: the utility model discloses lower baffle, the upper end symmetry of lower baffle is provided with left support and right support, left support and right support are all L shape structure, the bottom edge of left support and right support all is provided with first connecting hole, lower baffle is provided with the second connecting hole of with first connecting hole adaptation, first connecting hole is connected with second connecting hole through bolt, the vertical edge of left support and right support all is provided with mounting hole, mounting hole is connected with external motor mounting plate through bolt.

[0009] From the above scheme, the application is applicable to the motor protection field of parallel axis electric drive bridge. In the vehicle driving process, the hard object from the ground can be prevented from colliding, the motor body is protected, the driving safety on the complex road surface is improved, and the application has the characteristics of simple structure, convenient dismounting, high adaptability and high structural strength.

[0010] One preferred scheme is that the L-shaped structure includes a bottom plate and a vertical plate, the bottom plate is arranged perpendicularly to the vertical plate, a first reinforcing rib is arranged at an included angle between the bottom plate and the vertical plate, and the first reinforcing rib, the bottom plate and the vertical plate are connected by tailor welding.

[0011] One preferred scheme is that the front part of the lower baffle is provided with a front baffle, the rear part of the lower baffle is provided with a rear baffle, and the front baffle and the rear baffle are both of an upward turning type.

[0012] One preferred scheme is that the bottom part of the lower baffle is provided with a plurality of drainage holes.

[0013] One preferred scheme is that the middle part of the lower baffle is provided with a plurality of second reinforcing ribs, and the left and right ends of the second reinforcing ribs respectively extend to the front baffle and the rear baffle.

[0014] One preferred scheme is that the middle upper part of the vertical plate of the right support is provided with a notch, and the notch is adapted to an oil drain bolt of an external speed reducer. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a schematic diagram of the three-dimensional structure of the utility model;

[0016] Figure 2 is a schematic diagram of the three-dimensional structure of the lower baffle;

[0017] Figure 3 is a schematic diagram of the three-dimensional structure of the right support;

[0018] Figure 4 is a schematic diagram of the left bracket in perspective view;

[0019] Figure 5 is a schematic diagram of the utility model installed to the external motor mounting plate in perspective view;

[0020] Figure 6 is a schematic diagram of the utility model installed to the external motor mounting plate in another angle in perspective view. DETAILED DESCRIPTION

[0021] As Figures 1 to 6 shown, in this embodiment, the utility model includes lower guard plate 1, the upper end of lower guard plate 1 is symmetrically provided with left bracket 2 and right bracket 3, left bracket 2 and right bracket 3 are both L-shaped structure, the bottom edge of left bracket 2 and right bracket 3 is all provided with first connecting hole 4, lower guard plate 1 is provided with second connecting hole 5 matched with first connecting hole 4, first connecting hole 4 is connected with second connecting hole 5 by bolt, the vertical edge of left bracket 2 and right bracket 3 is all provided with mounting hole 6, mounting hole 6 is connected with external motor mounting plate by bolt.

[0022] External motor mounting plate is used for installing motor, left bracket 2 is connected with the left side of external motor mounting plate, right bracket 3 is connected with the right side of external motor mounting plate, lower guard plate 1 is connected with left bracket 2 and right bracket 3 by bolt, and it is convenient to disassemble, without needing to additionally provide mounting hole for the chassis of vehicle body, it can be directly connected with external motor mounting plate, lower guard plate 1 protects motor body while reducing the planar size of guard plate, saves cost, and is favorable for heat dissipation and drainage of vehicle body.

[0023] As Figures 3 to 4 shown, in this embodiment, the L-shaped structure includes bottom plate 7 and vertical plate 8, bottom plate 7 is vertically arranged with vertical plate 8, the included angle between bottom plate 7 and vertical plate 8 is provided with first reinforcing rib 9, first reinforcing rib 9, bottom plate 7 and vertical plate 8 are connected by tailor welding.

[0024] First reinforcing rib 9 is used for strengthening the structural strength of left bracket 2 and right bracket 3, thereby improving the anti-impact strength of left bracket 2 and right bracket 3.

[0025] As Figures 1 to 4 shown, in this embodiment, the front part of lower guard plate 1 is provided with front baffle 10, the rear part of lower guard plate 1 is provided with rear baffle 11, front baffle 10 and rear baffle 11 are both upturned structure.

[0026] The front baffle 10 can effectively block the impact from the front lower part of the motor, play a role in guiding flow, reduce the air resistance of the lower guard plate 1, and also improve the structural strength of the lower guard plate 1. The rear baffle 11 of the upper turning type is designed at the rear of the main plate of the lower guard plate 1, which mainly plays a role in improving the structural strength of the lower guard plate 1.

[0027] As shown in Figures 1 to 2 In this embodiment, the bottom of the lower guard plate 1 is provided with a plurality of drainage holes 12. The drainage holes 12 are used to drain the mud and water on the lower guard plate 1 during driving, avoid water accumulation, and improve the anti-corrosion and anti-rust ability. At the same time, under the condition of ensuring the structural strength, the drainage holes 12 play a role in reducing the weight of the lower guard plate 1.

[0028] As shown in Figures 1 to 4 In this embodiment, the middle part of the lower guard plate 1 is provided with a plurality of second reinforcing ribs 13, and the left and right ends of the second reinforcing ribs 13 respectively extend to the front baffle 10 and the rear baffle 11. The second reinforcing ribs 13 are used to strengthen the structural strength of the lower guard plate 1, thereby improving the anti-impact strength of the lower guard plate 1 and effectively avoiding the vibration of the lower guard plate 1 to generate noise.

[0029] As shown in Figures 3 to 6 In this embodiment, a notch 14 is formed in the middle upper part of the vertical plate 8 of the right support 3, and the notch 14 is matched with the oil drain bolt of the external reduction box. The notch 14 is used for the accommodation of the oil drain bolt of the external reduction box, which facilitates the subsequent operation of the oil drain bolt of the reduction box without disassembling the right support 3.

Claims

1. An electric machine guard for an electric drive axle, characterized by: It includes lower guard (1), the upper end of the lower guard (1) is symmetrically provided with left support (2) and right support (3), the left support (2) and the right support (3) are L-shaped structure, the bottom edge of the left support (2) and the right support (3) is all set with first connecting hole (4), the lower guard (1) is set with second connecting hole (5) compatible with the first connecting hole (4), the first connecting hole (4) is connected with the second connecting hole (5) by bolt, the vertical edge of the left support (2) and the right support (3) is all set with mounting hole (6), the mounting hole (6) is connected with external motor mounting plate by bolt.

2. The motor shield for an electric drive axle of claim 1, wherein: The L-shaped structure includes bottom plate (7) and stand plate (8), the bottom plate (7) is vertically arranged with the stand plate (8), the included angle between the bottom plate (7) and the stand plate (8) is provided with first reinforcing rib (9), the first reinforcing rib (9), the bottom plate (7) and the stand plate (8) are connected by tailor welding.

3. The motor shield for an electric drive axle of claim 1, wherein: The front of the lower guard (1) is provided with front baffle (10), the rear of the lower guard (1) is provided with rear baffle (11), the front baffle (10) and the rear baffle (11) are all upturned structure.

4. The motor shield for an electric drive axle of claim 1, wherein: The bottom of the lower guard (1) is provided with several drainage holes (12).

5. The motor shield for an electric drive axle of claim 3, wherein: The middle part of the lower guard (1) is provided with several second reinforcing ribs (13), the left and right ends of the second reinforcing rib (13) extend to the front baffle (10), the rear baffle (11) respectively.

6. The motor shield for an electrically driven axle of claim 2, wherein: The middle upper part of the stand plate (8) of the right support (3) is set with notch (14), the notch (14) is compatible with the oil drain bolt of external reduction gearbox.

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