Motor cooling system of electric miniature excavator and electric miniature excavator

Abstract

The utility model discloses a motor heat dissipation system of an electric miniature excavator and the electric miniature excavator. The motor heat dissipation system of the electric miniature excavator comprises a motor arranged in an excavator covering part, a motor cover at least partially wrapping the motor and a blower device blowing heat dissipation airflow into the motor cover. A first space is formed between the excavator covering part and the motor cover, and a second space is formed between the motor cover and the wrapped surface of the motor; the blower device blows airflow in the first space into the second space, and high-temperature gas in the second space escapes into the first space and is discharged outwards from the first space. According to the motor heat dissipation system of the electric miniature excavator, the motor cover is additionally arranged outside the motor to form the second space, and then the air in the first space is conveyed into the second space through the blower device, so that the air flow is directly and intensively contacted with the outer surface of the motor to dissipate heat of the motor.

Description

Technical Field

[0001] This utility model relates to the field of excavator technology, and in particular to a motor cooling system for an electric mini excavator and an electric mini excavator. Background Technology

[0002] Currently, in construction machinery, mini electric excavators use motors to drive the main pump for various working conditions. During prolonged operation, especially in high summer temperatures, the motor is prone to overheating, leading to reduced motor power and even vehicle malfunction. Due to the limited space in mini electric excavators, the common cooling method for the motor is to add ventilation holes to the excavator's body panels. An internal cooling fan blows air through ducts, dissipating it through the ventilation holes. However, this existing cooling method compromises the integrity and strength of the excavator's body panels and can cause leaks, affecting the excavator's lifespan and increasing the probability of malfunctions. Utility Model Content

[0003] In order to overcome at least one of the defects of the prior art, one of the objectives of this utility model is to provide a heat dissipation system for an electric mini excavator motor. In this heat dissipation system, a motor cover is added to the outside of the motor to form a second space. Then, a blower is used to transport the gas in the first space to the second space, so that the airflow directly and concentratedly contacts the outer surface of the motor to dissipate heat from the motor.

[0004] In order to overcome at least one of the defects of the prior art, one of the objectives of this utility model is to provide an electric mini excavator. The electric mini excavator uses the aforementioned electric mini excavator motor cooling system, which makes the electric mini excavator have good heat dissipation effect, enabling the electric mini excavator to maintain high efficiency for a long time, reducing failures and extending service life.

[0005] The technical solution adopted by this utility model to solve its problem is:

[0006] A heat dissipation system for an electric mini excavator motor includes a motor disposed inside the excavator cover, a motor cover that at least partially encloses the motor, and a blower device for blowing cooling airflow into the motor cover.

[0007] A first space is formed between the excavator cover and the motor cover, and a second space is formed between the motor cover and the surface of the motor that is covered. The blower blows the airflow in the first space into the second space, and the high-temperature gas in the second space escapes into the first space and is discharged outward from the first space.

[0008] Furthermore, the motor cover is detachably installed with the motor, and the motor cover wraps around the motor along the outer peripheral surface of the motor.

[0009] Furthermore, the motor cover is provided with a mounting part, and the blower is fixedly installed on the mounting part.

[0010] Furthermore: the mounting part is a mounting base, and the blower is fixedly installed in the mounting base.

[0011] Furthermore, exhaust ports are provided at both ends of the motor cover, and the high-temperature gas in the second space overflows from the exhaust ports.

[0012] Furthermore: the length of the motor cover is not greater than the axial length of the motor, and the exhaust port is formed by the end of the motor cover and the outer surface of the motor.

[0013] Furthermore, the blower includes a fan, and the fan is a suction fan, which blows airflow toward the outer surface of the motor.

[0014] Furthermore, the electric mini excavator motor cooling system also includes a temperature sensor, a vehicle controller, and a motor controller. The temperature sensor is disposed on the outer surface of the motor and electrically connected to the motor controller. The vehicle controller is electrically connected to the motor controller and electrically connected to the blower.

[0015] Furthermore, the excavator cover is provided with an airflow inlet and an airflow outlet.

[0016] An electric mini excavator includes the aforementioned electric mini excavator motor cooling system.

[0017] In summary, the electric mini excavator motor cooling system provided by this utility model has the following technical effects: by setting up a motor cover, a first space and a second space are formed inside the excavator cover. Utilizing the temperature difference between the first space and the second space, the lower-temperature gas in the first space is used to dissipate heat from the high-temperature motor in the second space, thereby achieving motor cooling, ensuring the cooling effect, and simultaneously ensuring the integrity of the excavator cover, reducing the excavator's failure rate, and extending the excavator's service life.

[0018] In summary, the electric mini excavator provided by this utility model has the following technical effects: the electric mini excavator uses the aforementioned electric mini excavator motor cooling system, which makes the electric mini excavator have good heat dissipation effect, enabling the electric mini excavator to maintain high efficiency for a long time, reducing failures and extending service life. Attached Figure Description

[0019] Figure 1This is a schematic diagram of one embodiment of the heat dissipation system for an electric mini excavator motor according to the present invention.

[0020] Figure 2 This is a schematic diagram of the motor cover installation.

[0021] The meanings of the reference numerals in the attached figures are as follows:

[0022] 1. Motor; 2. Motor cover; 3. Mounting base; 4. Blower; 5. Exhaust port; 6. Connecting bolts. Detailed Implementation

[0023] To better understand and implement this invention, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings.

[0024] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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 utility model.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0026] See Figure 1 and Figure 2 This utility model discloses a heat dissipation system for an electric mini excavator motor 1.

[0027] A cooling system for an electric mini excavator motor 1 includes a motor 1 disposed inside the excavator cover, a motor cover 2 that at least partially encloses the motor 1, and a blower 4 that blows cooling airflow into the motor cover 2.

[0028] A first space is formed between the excavator cover and the motor cover 2, and a second space is formed between the motor cover 2 and the surface of the motor 1 that is covered. The blower 4 blows the airflow in the first space into the second space, and the high-temperature gas in the second space escapes into the first space and is discharged outward from the first space.

[0029] Based on the above technical solution, the excavator cover is an existing structure on the excavator. An installation space is formed between the excavator cover and the excavator body, and the motor 1 that drives the main pump on the excavator is fixedly installed within this installation space. For heat dissipation, the aforementioned installation space is connected to the outside of the excavator, typically through an airflow inlet and outlet. It should be noted that the airflow inlet and outlet connecting the installation space to the external environment are generally installed in specific areas to facilitate airflow into and out of the installation space, while also ensuring that external rainwater does not enter the installation space through the airflow inlet or outlet.

[0030] In the above scheme, motor 1 is installed within the aforementioned installation space, and a motor cover 2 is wrapped around the outside of motor 1, thus forming a first space and a second space. The first space is formed between the excavator cover and the motor cover 2, and the second space is formed between the motor cover 2 and the surface of motor 1 that is covered. Motor 1 is located within the second space. Because motor 1 is operating, its surface temperature can reach up to 100℃ or even higher. However, the maximum temperature of the airflow within the first space cannot reach 100℃. Therefore, the airflow temperature within the first space is much lower than the surface temperature of motor 1. Thus, in this scheme, heat dissipation of motor 1 is achieved by utilizing the lower-temperature airflow within the first space to cool the surface of motor 1.

[0031] In the above technical solution, the airflow in the first space is blown into the second space by the blower 4. When the airflow enters the second space, part of the airflow exchanges with the original airflow in the second space, squeezing out the original high-temperature airflow from the second space, which can cool the second space. Part of the airflow comes into contact with the surface of the motor 1, realizing heat exchange with the surface of the motor 1, and realizing direct cooling and heat dissipation of the motor 1.

[0032] In the above technical solution, the high-temperature airflow discharged from the second space will flow into the first space and be discharged outside the installation space through the airflow outlet on the first space, so as to avoid the airflow temperature in the second space being too high.

[0033] In this technical solution, the motor cover 2 is detachably installed from the motor 1, and the motor cover 2 wraps around the outer periphery of the motor 1. The detachable installation of the motor cover 2 from the motor 1 ensures that the installation of the motor cover 2 will not obstruct the maintenance and repair of the motor 1. When the motor 1 needs maintenance and repair, the motor cover 2 can be removed.

[0034] like Figure 2As shown, the motor cover 2 is made of a metal plate with good toughness, which wraps around the outside of the motor 1, and the two ends of the metal plate are fixedly connected by connecting bolts 6. This ensures that the motor cover 2 wraps around the outside of the motor 1. Of course, when the metal plate wraps around the outside of the motor 1, it is necessary to ensure that there is a certain space between the inner wall of the metal plate and the outer surface of the motor 1 to form a second space.

[0035] In this technical solution, a mounting part is provided on the motor cover 2, and the blower 4 is fixedly installed on the mounting part. The mounting part facilitates the installation of the blower 4, ensures the stable installation of the blower 4, and reduces the vibration of the blower 4 during operation.

[0036] In this technical solution, the mounting part is the mounting base 3, and the blower 4 is fixedly installed inside the mounting base 3. For example... Figure 2 As shown, an outwardly protruding mounting base 3 is provided on the motor cover 2 to provide sufficient space for the installation of the blower device 4. At the same time, it ensures that the air outlet surface of the blower device 4 is at a certain distance from the surface of the motor 1, so that the airflow discharged by the blower device 4 can fully enter the second space and flow in the second space, thereby achieving cooling of the second space and heat exchange with the surface of the motor 1.

[0037] In this technical solution, exhaust ports 5 are provided at both ends of the motor cover 2, through which high-temperature gas in the second space overflows. The exhaust ports 5 facilitate the airflow discharge in the second space, ensuring timely cooling within the second space and timely cooling of the surface of the motor 1.

[0038] In this technical solution, the length of the motor cover 2 is no greater than the axial length of the motor 1, and the exhaust port 5 is formed by the end of the motor cover 2 and the outer surface of the motor 1. This facilitates the installation and fixation of the motor cover 2, and also facilitates the rapid discharge of high-temperature airflow from the second space.

[0039] In this technical solution, the blower device 4 includes a fan, and the fan is a suction fan, blowing air out towards the outer surface of the motor 1. The blower device 4 uses a fan, which is low in cost, small in size, and easy to install.

[0040] In this technical solution, the heat dissipation system of the electric mini excavator motor 1 also includes a temperature sensor, a vehicle controller and a motor 1 controller. The temperature sensor is set on the outer surface of the motor 1 and is electrically connected to the motor 1 controller. The vehicle controller is electrically connected to the motor 1 controller and the vehicle controller is electrically connected to the blower 4.

[0041] In the above scheme, a temperature sensor monitors the surface temperature of motor 1 and sends the obtained surface temperature of motor 1 to the vehicle controller via the motor 1 controller. The vehicle controller compares the received real-time temperature with a set temperature value. If the real-time temperature is higher than the set temperature value, the vehicle controller controls the blower device 4 to start, thereby cooling motor 1. Conversely, if the real-time temperature is lower than the set temperature value, the vehicle controller controls the blower device 4 to stop working, reducing energy consumption. This technical solution achieves automated start and stop of the blower device 4, realizing energy consumption control.

[0042] In this technical solution, the excavator cover is equipped with an airflow inlet and an airflow outlet, which enables the timely discharge of airflow within the installation space formed by the excavator cover and the exchange of airflow with the outside.

[0043] This technical solution also proposes an electric mini excavator, which includes the aforementioned electric mini excavator motor 1 cooling system, resulting in good heat dissipation of the electric mini excavator, enabling the electric mini excavator to maintain high-efficiency operation for a long time, reducing malfunctions, and extending service life.

[0044] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. A heat dissipation system for an electric mini excavator motor, characterized in that: It includes a motor housed inside the excavator cover, a motor cover that at least partially encloses the motor, and a blower that blows cooling airflow into the motor cover. A first space is formed between the excavator cover and the motor cover, and a second space is formed between the motor cover and the surface of the motor that is covered. The blower blows the airflow in the first space into the second space, and the high-temperature gas in the second space escapes into the first space and is discharged outward from the first space.

2. The electric mini excavator motor cooling system according to claim 1, characterized in that: The motor cover is detachably installed on the motor, and the motor cover wraps around the motor along the outer peripheral surface of the motor.

3. The electric mini excavator motor cooling system according to claim 1 or 2, characterized in that: The motor cover is provided with a mounting part, and the blower is fixedly installed on the mounting part.

4. The electric mini excavator motor cooling system according to claim 3, characterized in that: The mounting part is a mounting base, and the blower is fixedly installed in the mounting base.

5. The electric mini excavator motor cooling system according to claim 1 or 2, characterized in that: The motor cover has exhaust ports at both ends, and the high-temperature gas in the second space overflows from the exhaust ports.

6. The electric mini excavator motor cooling system according to claim 5, characterized in that: The length of the motor cover is not greater than the axial length of the motor, and the exhaust port is formed by the end of the motor cover and the outer surface of the motor.

7. The electric mini excavator motor cooling system according to claim 1, characterized in that: The blower includes a fan, and the fan is a suction fan, which blows airflow toward the outer surface of the motor.

8. The electric mini excavator motor cooling system according to claim 1, characterized in that: It also includes a temperature sensor, a vehicle controller, and a motor controller. The temperature sensor is disposed on the outer surface of the motor and electrically connected to the motor controller. The vehicle controller is electrically connected to the motor controller and the vehicle controller is electrically connected to the blower.

9. The electric mini excavator motor cooling system according to claim 1, characterized in that: The excavator cover is equipped with an airflow inlet and an airflow outlet.

10. An electric mini excavator, characterized in that, Includes the electric mini excavator motor cooling system as described in any one of claims 1 to 9.

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