Cooling system for chassis and top-mounted shared motor of special electric vehicle

Abstract

The utility model relates to a cooling system for a chassis and a top-mounted shared motor of an electric special vehicle, which comprises a radiator, an electric water pump, a chassis driving motor and a top-mounted driving motor, the water outlet end of the electric water pump is respectively connected with the water inlet ends of the heat dissipation mechanism of the chassis driving motor and the heat dissipation mechanism of the upper-mounted driving motor through a first three-way joint in a pipeline manner, and the water outlet ends of the heat dissipation mechanism of the chassis driving motor and the heat dissipation mechanism of the upper-mounted driving motor are connected into the water return end of the radiator in parallel through a second three-way joint; according to the chassis-top-mounted shared motor cooling system of the electric special vehicle, the chassis driving motor and a heat dissipation mechanism of the top-mounted driving motor are connected to one heat dissipation device in parallel through the electric water pump and the two tee joints, one set of cooling system is shared, and the modification cost of the vehicle is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy special vehicles, and in particular to a chassis-superstructure common motor cooling system for electric special vehicles. Background Art

[0002] In recent years, new energy special vehicles have gradually increased in volume. When switching to new energy, special vehicles that traditionally use main and auxiliary engines or high-power power take-off engines need to set up main and auxiliary motors to provide power for the chassis and the upper body respectively. Among them, the main motor is the chassis drive motor, which is used to drive the chassis to move; the auxiliary motor is the upper body drive motor, which is used to drive the special upper body operation needs. In order to cool the main and auxiliary motors, the vehicle generally has a chassis motor cooling system on the chassis, which is mainly used to cool the chassis motor controller and the chassis motor; the upper body has another upper body motor cooling system, which is used to cool the upper body operation motor controller and the upper body motor, and the two cooling systems work independently. However, the two independent cooling systems take up a lot of space and are difficult to install, which greatly increases the types of parts and modifications required for the whole vehicle. Utility Model Content

[0003] In order to solve the problems in the prior art, the utility model patent provides a chassis-superstructure common motor cooling system for electric special-purpose vehicles to solve the problems of complex structure and high modification cost of the existing chassis and superstructure motor cooling systems for electric special-purpose vehicles.

[0004] The technical solution adopted by the utility model is:

[0005] A chassis-superstructure common motor cooling system for an electric special-purpose vehicle, the motor cooling system comprising a radiator, an electric water pump, a chassis drive motor and a superstructure drive motor, the water inlet end pipeline of the electric water pump being connected to the water outlet end of the radiator, the water outlet end of the electric water pump being connected to the water inlet ends of the heat dissipation mechanism of the chassis drive motor and the heat dissipation mechanism of the superstructure drive motor through a first three-way joint, and the water outlet ends of the heat dissipation mechanism of the chassis drive motor and the heat dissipation mechanism of the superstructure drive motor being connected in parallel to the return water end of the radiator through a second three-way joint.

[0006] Furthermore, the water supply pipeline between the first three-way joint and the chassis drive motor is connected in series to the heat dissipation device of the chassis drive motor controller, and the water supply pipeline between the first three-way joint and the upper body drive motor is connected in series to the heat dissipation device of the upper body drive motor controller.

[0007] Furthermore, the motor cooling system also includes an expansion water tank, the outlet pipe of the expansion water tank is connected to the connecting pipe between the water inlet end of the electric water pump and the radiator through a third three-way joint, and a top water outlet is opened at the top of the radiator, and the top water outlet is connected to the return pipe of the expansion water tank.

[0008] Furthermore, the water outlet of the radiator for connecting to the electric water pump is arranged at the bottom of the radiator, and the installation position of the electric water pump is lower than the lowest point of the coolant level in the radiator.

[0009] Furthermore, the bottom end of the installation position of the expansion water tank is higher than the radiator and is located at the highest point of the entire motor cooling system.

[0010] Furthermore, an overflow hole and an exhaust hole are opened on the top of the expansion water tank.

[0011] Compared with the prior art, the improvement of the chassis-superstructure common motor cooling system of the electric special vehicle of the utility model is:

[0012] 1. Since the cooling temperatures required by the chassis motor system and the upper motor system of special vehicles are generally similar, the cooling mechanisms of the chassis motor system and the upper motor system are connected in parallel on the same electric water pump and radiator circulation pipeline through a three-way joint, thereby reducing the use of a set of radiators and water pumps, simplifying the installation structure of the motor cooling system, reducing space occupancy, and greatly reducing the vehicle modification cost.

[0013] 2. The motor cooling system is equipped with an expansion water tank. When the high-temperature coolant that has cooled the motor controller and the motor returns to the radiator, it is easy to generate water vapor, forming an air barrier and causing local overheating. At this time, the water vapor can enter the bottom of the expansion water tank through the water outlet at the top of the radiator to be cooled and liquefied. At the same time, overflow holes and exhaust holes are also set at the top of the expansion water tank to discharge excess gas and coolant in the cooling system to prevent the cooling system from being over-pressured and causing pipe bursts. The expansion water tank is set at the highest point of the motor cooling system to ensure smooth overflow and exhaust. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The utility model is a schematic structural diagram of a chassis-superstructure common motor cooling system for an electric special vehicle.

[0015] In the figure, 1 is a radiator, 2 is a third three-way connector, 3 is an electric water pump, 4 is a first three-way connector, 5 is a chassis drive motor controller, 6 is a second three-way connector, 7 is a chassis drive motor, 8 is a body drive motor, 9 is a body drive motor controller, and 10 is an expansion tank. DETAILED DESCRIPTION

[0016] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments. The technical solutions in the embodiments of the utility model are clearly and completely described, and the described embodiments are only part of the embodiments of this patent, not all. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this patent.

[0017] like Figure 1 As shown, the utility model provides an embodiment of a chassis-superstructure common motor cooling system for electric special-purpose vehicles. In this embodiment, the motor cooling system includes a radiator 1, an electric water pump 3, a chassis drive motor controller 5, a chassis drive motor 7, a superstructure drive motor 8 and a superstructure drive motor controller 9. The chassis drive motor 7 and the superstructure drive motor 8 are both equipped with a heat dissipation mechanism, and the chassis drive motor controller 5 and the superstructure drive motor controller 9 are also equipped with a heat dissipation device. The water inlet end of the electric water pump 3 is connected to the water outlet end at the bottom of the radiator 1 through a pipeline. When the electric water pump 3 is installed, in order to prevent the water pump from idling, its position must be lower than the lowest point of the liquid level of the coolant in the radiator 1.

[0018] The water outlet pipeline of the electric water pump 3 is divided into two water supply branches through the first three-way joint 4, one of which is connected in series with the heat dissipation device of the chassis drive motor controller 5 and the heat dissipation mechanism of the chassis drive motor 7 in sequence, and the other water supply branch is connected in series with the heat dissipation device of the upper drive motor controller 9 and the heat dissipation mechanism of the upper drive motor 8 in sequence, and the water outlet end pipelines of the heat dissipation mechanism of the chassis drive motor 7 and the heat dissipation mechanism of the upper drive motor 8 are connected in parallel to the return water end pipeline of the radiator 1 through the second three-way joint 6.

[0019] The motor cooling system is also provided with an expansion water tank 10, which is installed at the highest point of the entire motor cooling system, and its lowest end needs to be higher than the top of the radiator 1. The outlet pipe of the expansion water tank 10 is connected to the connecting pipe between the water inlet end of the electric water pump 3 and the radiator 1 through the third three-way joint 2. A top water outlet is opened at the top of the expansion water tank 10, and the top water outlet is connected to the return water pipe of the expansion water tank 10. In addition, an overflow hole and an exhaust hole are opened at the top of the expansion water tank 10.

[0020] When the chassis-superstructure common motor cooling system of the electric special vehicle of the utility model is used, the coolant in the radiator 1 is transported to the superstructure motor cooling system and the chassis motor cooling system through two water supply branches by the electric water pump 3. Since the maximum allowable water inlet temperature of the superstructure drive motor controller 9 and the chassis drive motor controller 5 is 60°C, and the maximum allowable water inlet temperature of the superstructure drive motor 8 and the chassis drive motor 7 is 65°C, the controller needs to be located upstream of the corresponding drive motor. After passing through the heat dissipation devices of the controller and the drive motor, the coolant flows back to the radiator 1 for heat dissipation and cooling, completing a cycle.

[0021] The above content is only a preferred embodiment of this patent and cannot be used to limit the scope of implementation of this patent. That is, all simple equivalent changes and modifications made according to the claims and patent description of this patent are still within the scope covered by this patent.

Claims

1. A chassis-superstructure common motor cooling system for electric special-purpose vehicles, characterized in that: The motor cooling system comprises a radiator (1), an electric water pump (3), a chassis drive motor (7) and a top-mounted drive motor (8); a water inlet pipe of the electric water pump (3) is connected to a water outlet of the radiator (1); the water outlet of the electric water pump (3) is connected to water inlets of a heat dissipation mechanism of the chassis drive motor (7) and a heat dissipation mechanism of the top-mounted drive motor (8) through a first three-way joint (4); and the water outlets of the heat dissipation mechanism of the chassis drive motor (7) and the heat dissipation mechanism of the top-mounted drive motor (8) are connected in parallel to a water return end of the radiator (1) through a second three-way joint (6).

2. The chassis-superstructure common motor cooling system for electric special-purpose vehicles according to claim 1 is characterized in that: The water supply pipeline between the first three-way connector (4) and the chassis drive motor (7) is connected in series with a heat dissipation device of the chassis drive motor controller (5), and the water supply pipeline between the first three-way connector (4) and the upper body drive motor (8) is connected in series with a heat dissipation device of the upper body drive motor controller (9).

3. The chassis-superstructure common motor cooling system for electric special-purpose vehicles according to claim 2 is characterized in that: The motor cooling system further comprises an expansion water tank (10), the water outlet pipeline of the expansion water tank (10) being connected to the connecting pipeline between the water inlet end of the electric water pump (3) and the radiator (1) via a third three-way joint (2), the top of the radiator (1) being provided with a top water outlet, the top water outlet being connected to the return water pipeline of the expansion water tank (10).

4. The chassis-superstructure common motor cooling system for electric special-purpose vehicles according to claim 3 is characterized in that: The water outlet of the radiator (1) for connecting to the electric water pump (3) is arranged at the bottom of the radiator (1), and the installation position of the electric water pump (3) is lower than the lowest point of the coolant level in the radiator (1).

5. The chassis-superstructure common motor cooling system for electric special-purpose vehicles according to claim 4 is characterized in that: The bottom end of the installation position of the expansion water tank (10) is higher than the radiator (1) and is located at the highest point of the entire motor cooling system.

6. The chassis-superstructure common motor cooling system for electric special-purpose vehicles according to claim 5 is characterized in that: An overflow hole and an exhaust hole are provided on the top of the expansion water tank (10).

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