Auxiliary servo module for a commercial vehicle and commercial vehicle

Abstract

The present application relates to the field of commercial vehicles, in particular to an auxiliary servo module (1) for a commercial vehicle, the auxiliary servo module (1) comprising at least an electric motor (2), a steering pump (3) and an air compressor (4), the steering pump (3) and the air compressor (4) each being driven by the electric motor (2), wherein the electric motor (2) and the air compressor (4) are connected in a same coolant circuit (6) of the commercial vehicle, such that the electric motor (2) and the air compressor (4) can be cooled by means of the coolant circuit (6). The present application also relates to a commercial vehicle. By means of at least some of the embodiments of the present application, not only the arrangement and design of the coolant circuit of the auxiliary servo module can be simplified, but also the installation, construction and maintenance costs can be further reduced and the installation space can be further saved by cooling the auxiliary servo module by means of the already existing coolant circuit of the vehicle.

Description

Technical Field

[0001] This application relates to the field of commercial vehicles, specifically to an auxiliary servo module for commercial vehicles. Furthermore, this application also relates to a commercial vehicle. Background Technology

[0002] In commercial vehicles, a steering pump assists the driver's steering and compressed air from an air compressor provides braking force.

[0003] In existing commercial vehicles, the steering pump and air compressor are driven by separate drive units, such as electric motors, and are cooled by separate cooling systems.

[0004] Integrating the steering pump with the air compressor presents challenges such as a complex cooling system, complex cooling channel design, increased space requirements, and higher installation costs.

[0005] Therefore, there is still a need to improve existing technologies. Summary of the Invention

[0006] Therefore, the purpose of this application is to provide an improved auxiliary servo module for commercial vehicles and a correspondingly improved commercial vehicle, in order to overcome at least some of the disadvantages of the prior art.

[0007] According to a first aspect of this application, an auxiliary servo module for a commercial vehicle is provided, wherein the auxiliary servo module includes at least an electric motor, a steering pump, and an air compressor, wherein the steering pump and the air compressor are respectively driven by the electric motor, and wherein the electric motor and the air compressor are connected in the same coolant circuit of the commercial vehicle, thereby enabling the electric motor and the air compressor to be cooled by means of the coolant circuit.

[0008] According to an alternative embodiment of the auxiliary servo module of this application, the air compressor and the electric motor are fluidly connected in series with each other in the coolant circuit.

[0009] According to an alternative embodiment of the auxiliary servo module of this application, the air compressor is located downstream of the electric motor in terms of coolant flow.

[0010] According to an optional embodiment of the auxiliary servo module of this application, the motor includes a first motor coolant interface and a second motor coolant interface, and the air compressor includes a first air compressor coolant interface and a second air compressor coolant interface, wherein the second motor coolant interface is fluidly connected to the first air compressor coolant interface via a pipeline.

[0011] According to an optional embodiment of the auxiliary servo module of this application, the auxiliary servo module further includes a clutch device disposed between the air compressor and the motor, by means of which the air compressor and the motor are selectively coupled in a manner capable of transmitting torque.

[0012] According to an optional embodiment of the auxiliary servo module of this application, the motor includes a motor housing, a stator and a rotor housed in the motor housing, and a motor shaft anti-torsionally connected to the rotor. A first motor coolant interface and a second motor coolant interface are arranged on the motor housing. A motor cooling channel for cooling the stator is constructed in the motor housing. The motor cooling channel is fluidly connected to the first motor coolant interface and the second motor coolant interface, respectively.

[0013] According to an optional embodiment of the auxiliary servo module of this application, the air compressor includes an air compressor housing, a first air compressor coolant interface and a second air compressor coolant interface are arranged on the air compressor housing, and an air compressor cooling channel is constructed in the air compressor housing, the air compressor cooling channel being fluidly connected to the first air compressor coolant interface and the second air compressor coolant interface.

[0014] According to an optional embodiment of the auxiliary servo module of this application, the air compressor housing and the motor housing are axially connected, wherein the first air compressor coolant interface and the second air compressor coolant interface are arranged on the end region of the air compressor housing opposite to the motor housing.

[0015] According to an optional embodiment of the auxiliary servo module of this application, the first air compressor coolant interface and the second air compressor coolant interface are arranged spaced apart from each other on the periphery of the air compressor housing.

[0016] According to an optional embodiment of the auxiliary servo module of this application, the first motor coolant interface and the second motor coolant interface are arranged adjacent to each other on the periphery of the motor housing.

[0017] According to an alternative embodiment of the auxiliary servo module of this application, the piping is located outside the motor housing and the air compressor housing.

[0018] According to an alternative embodiment of the auxiliary servo module of this application, a reversing valve is arranged in the pipeline, the reversing valve being additionally capable of fluid connection with the coolant circuit, wherein the reversing valve is configured to interrupt the fluid connection between the motor and the air compressor via the pipeline and switch to fluid connection with the coolant circuit when the clutch is disengaged, so that the coolant in the coolant circuit cools only the motor.

[0019] According to an optional embodiment of the auxiliary servo module of this application, the reversing valve is configured as a two-position three-way reversing valve.

[0020] According to an optional embodiment of the auxiliary servo module of this application, the coolant circuit is either the battery system coolant circuit of the commercial vehicle or the electric drive system coolant circuit of the commercial vehicle.

[0021] According to a second aspect of this application, a commercial vehicle is provided, wherein the commercial vehicle includes the auxiliary servo module described in the first aspect.

[0022] According to an alternative embodiment of the commercial vehicle of this application, the commercial vehicle is a pure electric commercial vehicle or a hybrid commercial vehicle.

[0023] The auxiliary servo module according to certain exemplary embodiments of this application has advantages such as simple structure and assembly, good cooling effect, and reliable operation. Attached Figure Description

[0024] The principles, features, and advantages of this application will be better understood below with reference to the accompanying drawings. The same reference numerals in the drawings refer to the same or corresponding parts. The drawings include: Figure 1 A schematic diagram illustrating an exemplary embodiment of the auxiliary servo module according to this application is shown; Figure 2 Show Figure 1 A schematic cross-sectional view of the auxiliary servo module; Figure 3 Show Figure 1 A schematic cross-sectional view of the motor of the auxiliary servo module; Figure 4 Show Figure 1 Fluid connection diagram of the auxiliary servo module; Figure 5 A schematic diagram showing another exemplary embodiment of the auxiliary servo module according to this application is shown, wherein the clutch is engaged; and Figure 6 Show Figure 5 Another schematic diagram of the auxiliary servo module, in which the clutch is in the disengaged state.

[0025] List of reference numerals 1. Auxiliary Servo Module 2 Electric motor 3. Steering pump 4. Air compressor 5. Clutch mechanism 6. Coolant Circuit 7 Piping 8. Reversing valve 21 Motor housing 22 Stator 23 Rotors 24 Motor Shaft 25 First motor coolant interface 26 Second motor coolant interface 27. Motor cooling channel 41 Air compressor housing 42 First air compressor coolant interface 43 Second air compressor coolant interface 44 Air compressor cooling channel 45 Air compressor shaft. Detailed Implementation

[0026] To make the technical problems to be solved, the technical solutions, and the beneficial technical effects of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and several exemplary embodiments. It should be understood that the specific embodiments described herein are only for explaining this application and are not intended to limit the scope of protection of this application.

[0027] Figure 1 A schematic diagram showing an exemplary embodiment of the auxiliary servo module 1 according to this application is provided. Figure 2 Show Figure 1 A schematic cross-sectional view of the auxiliary servo module 1. Figure 3 Show Figure 1 A schematic cross-sectional view of the motor 2 of the auxiliary servo module 1. Figure 4 Show Figure 1 Fluid connection diagram of auxiliary servo module 1.

[0028] like Figure 1 As shown, the auxiliary servo module 1 includes at least an electric motor 2, a steering pump 3, and an air compressor 4. The steering pump 3 and the air compressor 4 are driven by the electric motor 2.

[0029] In addition, the auxiliary servo module 1 also includes a clutch device 5 arranged between the air compressor 4 and the motor 2. The clutch device 5 can selectively couple the air compressor 4 and the motor 2 in a manner that can transmit torque and selectively separate the air compressor 4 and the motor 2.

[0030] According to this embodiment, such as Figure 4 As shown, the electric motor 2 and the air compressor 4 are connected in the same coolant circuit 6 of the commercial vehicle, so that the electric motor 2 and the air compressor 4 can be cooled by means of the coolant circuit 6.

[0031] For example, the commercial vehicle is a fully electric commercial vehicle, and the coolant circuit 6 can be the coolant circuit for the electric drive system of the commercial vehicle. Alternatively, the coolant circuit 6 can also be the coolant circuit for the battery system of the commercial vehicle.

[0032] For example, the coolant is water. Alternatively, other types of coolant may also be considered.

[0033] Therefore, the electric motor 2 and air compressor 4 of the auxiliary servo module 1 can be cooled using the existing coolant circuit of the commercial vehicle itself. This simplifies the design of the coolant circuit, reduces structural space requirements, and lowers manufacturing and installation costs.

[0034] In an embodiment not shown, the auxiliary servo module 1 may further include an air treatment unit (not shown in detail), which is connected to the end of the air compressor 4 and to the gas outlet of the air compressor 4. Thus, the air compressor 4 can supply compressed air to the air treatment unit for processing, such as filtering and drying.

[0035] like Figure 4 As shown, the air compressor 4 and the motor 2 are connected in series in the coolant circuit 6. Therefore, the coolant fluid connection between the motor 2 and the air compressor 4 can be simplified.

[0036] like Figure 1 and Figure 4 As shown, exemplarily, the electric motor 2 includes a first electric motor coolant inlet 25 and a second electric motor coolant inlet 26. The air compressor 4 includes a first air compressor coolant inlet 42 and a second air compressor coolant inlet 43. The second electric motor coolant inlet 26 is fluidly connected to the first air compressor coolant inlet 42 via a pipe 7. Furthermore, the first electric motor coolant inlet 25 is fluidly connected to the coolant circuit 6, and the second air compressor coolant inlet 43 is fluidly connected to the coolant circuit 6. Thus, coolant from the coolant circuit 6 can cool the electric motor 2 and the air compressor 4 separately via the pipe 7. Therefore, it is not necessary to establish separate cooling systems for the electric motor 2 and the air compressor 4.

[0037] For example Figure 4As shown, since the electric motor 2 drives both the steering pump 3 and the air compressor 4, and the electric motor 2 operates continuously during the operation of the commercial vehicle, the electric motor 2 generates a large amount of heat. Therefore, it is necessary to prioritize the cooling effect of the electric motor 2. Exemplarily, the air compressor 4 is located downstream of the electric motor 2 in terms of coolant flow. Coolant from the coolant circuit 6 first enters the electric motor 2 via the first electric motor coolant inlet 25 and cools the electric motor 2. Then, it enters the air compressor 4 via the second electric motor coolant inlet 26 through the pipe 7 and the first air compressor coolant inlet 42 and cools the air compressor 4. Finally, it flows out of the second air compressor coolant inlet 43 back into the coolant circuit 6. Therefore, here, the first electric motor coolant inlet 25 is the electric motor coolant inlet, and the second electric motor coolant inlet 26 is the electric motor coolant outlet. Correspondingly, the first air compressor coolant inlet 42 is the air compressor coolant inlet, and the second air compressor coolant inlet 43 is the air compressor coolant outlet. The electric motor coolant outlet and the air compressor coolant inlet are fluidly connected via the pipe 7.

[0038] For example, the first motor coolant interface 25 and the second motor coolant interface 26 are configured as connectors, as are the first air compressor coolant interface 42 and the second air compressor coolant interface 43. This simplifies the structural design and piping connections, and improves the reliability and sealing of the fluid connections.

[0039] The electric motor 2 includes an electric motor housing 21, a stator 22 and a rotor 23 housed within the electric motor housing 21, and an electric motor shaft 24 torsionally connected to the rotor 23. A first electric motor coolant inlet 25 and a second electric motor coolant inlet 26 are arranged on the electric motor housing 21. Therefore, the piping 7 is located outside the electric motor housing 21 and the air compressor housing 41, thereby simplifying the piping connection.

[0040] Also Figure 3 As shown, the motor 2 is constructed as an internal rotor motor, with the rotor 23 surrounded by the stator 22 in the circumferential direction surrounding the axial direction. A motor cooling channel 27 for cooling the stator 22 is constructed within the motor housing 21. The motor cooling channel 27 is fluidly connected to a first motor coolant inlet 25 and a second motor coolant inlet 26, respectively, and extends circumferentially around the stator 22 within the housing wall of the motor housing 21.

[0041] In addition, the air compressor 4 includes an air compressor housing 41. A first air compressor coolant inlet 42 and a second air compressor coolant inlet 43 are arranged on the air compressor housing 41. An air compressor cooling channel 44 is constructed in the air compressor housing 41, and the air compressor cooling channel 44 is fluidly connected to the first air compressor coolant inlet 42 and the second air compressor coolant inlet 43.

[0042] Also Figure 1As shown, the first air compressor coolant inlet 42 and the second air compressor coolant inlet 43 are arranged spaced apart from each other on the periphery of the air compressor housing 41. The first motor coolant inlet 25 and the second motor coolant inlet 26 are arranged adjacent to each other on the periphery of the motor housing 21. This further improves the structural compactness of the auxiliary servo module 1 and reduces the installation space requirements.

[0043] For example, the air compressor housing 41 is axially connected to the motor housing 21. Therefore, the first air compressor coolant inlet 42 and the second air compressor coolant inlet 43 are arranged on the end region of the air compressor housing 41 opposite to the motor housing 21.

[0044] Exemplarily, the steering pump 3 is configured as a hydraulic pump and is used to hydraulically assist the driver's steering operations. The air compressor 4 is configured as a piston air compressor and provides compressed air for braking force in the commercial vehicle. The clutch device 5 is configured as an electromagnetic clutch and is arranged in the air compressor housing 41. One end of the clutch device 5 is torsionally connected to the motor shaft 24 and the other end is torsionally connected to the air compressor shaft 45. By disengaging and engaging the clutch device 5, the motor 2 can selectively drive the air compressor 4. Here, during the operation of the commercial vehicle, the motor 2 and the air compressor 4 are continuously cooled by means of the coolant circuit 6.

[0045] Therefore, through Figures 1 to 4 The embodiment described herein can achieve reliable cooling of the motor 2 and the air compressor 4 in a particularly simple way, thereby improving the operational reliability of the auxiliary servo module 1, simplifying the structure and installation, and reducing manufacturing costs and space requirements.

[0046] Figure 5 A schematic diagram of another exemplary embodiment of the auxiliary servo module 1 according to this application is shown, wherein the clutch device 5 is engaged. Figure 6 Show Figure 5 Another schematic diagram of the auxiliary servo module 1, in which the clutch device 5 is in the disengaged state.

[0047] In this embodiment, such as Figure 5 and Figure 6 As shown, a directional valve 8 is arranged in the pipeline 7. The directional valve 8 is exemplarily constructed as a two-position three-way directional valve and is additionally capable of fluid connection with the coolant circuit 6.

[0048] In this embodiment, the reversing valve 8 can be used to interrupt the fluid connection between the motor 2 and the air compressor 4 via the pipeline 7 when the clutch 5 is disengaged, and switch to a fluid connection with the coolant circuit 6, so that the coolant flowing out from the second motor coolant interface 26 returns directly to the coolant circuit 6 through the reversing valve 8. Therefore, when the clutch 5 is disengaged, the reversing valve 8 ensures that the coolant in the coolant circuit 6 cools only the motor 2.

[0049] For example, the reversing valve 8 can be configured as a solenoid valve. Therefore, the reversing valve 8 can be controlled by a control device (not shown), such as the vehicle control unit (VCU) of a commercial vehicle, or linked to the disengagement operation of the clutch device 5, to disconnect the fluid connection between the second motor coolant interface 26 and the first air compressor coolant interface 42. Thus, in this embodiment, when the air compressor 4 is not driven by the motor 2, or when the air compressor 4 is not running, operating the reversing valve 8 can prevent coolant from flowing through the air compressor 4 and instead cool only the motor 2. This further improves energy utilization and cooling efficiency.

[0050] Obviously, this application also protects a commercial vehicle that includes the auxiliary servo module 1 of one of the above embodiments.

[0051] In one embodiment, the commercial vehicle is a fully electric commercial vehicle. Alternatively, the commercial vehicle may also be other types capable of electric drive, such as a hybrid commercial vehicle.

[0052] Although specific embodiments of this application are described in detail herein, they are given for illustrative purposes only and should not be construed as limiting the scope of this application. Various substitutions, modifications, and alterations can be conceived without departing from the spirit and scope of this application.

Claims

1. An auxiliary servo module (1) for commercial vehicles, wherein, The auxiliary servo module (1) includes at least an electric motor (2), a steering pump (3) and an air compressor (4), the steering pump (3) and the air compressor (4) being driven by the electric motor (2) respectively, wherein the electric motor (2) and the air compressor (4) are connected in the same coolant circuit (6) of the commercial vehicle, thereby enabling the electric motor (2) and the air compressor (4) to be cooled by means of the coolant circuit (6).

2. The auxiliary servo module (1) according to claim 1, wherein, The air compressor (4) and the motor (2) are connected in series with each other in the coolant circuit (6).

3. The auxiliary servo module (1) according to claim 1 or 2, wherein, The air compressor (4) is located downstream of the electric motor (2) in terms of coolant flow; and / or The electric motor (2) includes a first electric motor coolant inlet (25) and a second electric motor coolant inlet (26), and the air compressor (4) includes a first air compressor coolant inlet (42) and a second air compressor coolant inlet (43), wherein the second electric motor coolant inlet (26) is fluidly connected to the first air compressor coolant inlet (42) via a pipe (7); and / or The auxiliary servo module (1) also includes a clutch device (5) arranged between the air compressor (4) and the motor (2), by means of the clutch device (5) selectively coupling the air compressor (4) and the motor (2) in a manner that can transmit torque.

4. The auxiliary servo module (1) according to claim 3, wherein, The electric motor (2) includes an electric motor housing (21), a stator (22) and a rotor (23) housed in the electric motor housing (21), and an electric motor shaft (24) anti-torsionally connected to the rotor (23). A first electric motor coolant inlet (25) and a second electric motor coolant inlet (26) are arranged on the electric motor housing (21). An electric motor cooling channel (27) for cooling the stator (22) is constructed in the electric motor housing (21). The electric motor cooling channel (27) is fluidly connected to the first electric motor coolant inlet (25) and the second electric motor coolant inlet (26), respectively; and / or The air compressor (4) includes an air compressor housing (41), a first air compressor coolant inlet (42) and a second air compressor coolant inlet (43) are arranged on the air compressor housing (41), and an air compressor cooling channel (44) is constructed in the air compressor housing (41), the air compressor cooling channel (44) is fluidly connected to the first air compressor coolant inlet (42) and the second air compressor coolant inlet (43).

5. The auxiliary servo module (1) according to claim 4, wherein, The air compressor housing (41) is axially connected to the motor housing (21), wherein the first air compressor coolant inlet (42) and the second air compressor coolant inlet (43) are arranged on the end regions of the air compressor housing (41) opposite to the motor housing (21); and / or The first air compressor coolant inlet (42) and the second air compressor coolant inlet (43) are arranged spaced apart from each other on the periphery of the air compressor housing (41); and / or The first motor coolant inlet (25) and the second motor coolant inlet (26) are arranged adjacent to each other on the periphery of the motor housing (21); and / or The pipeline (7) is located outside the motor housing (21) and the air compressor housing (41).

6. The auxiliary servo module (1) according to any one of claims 3 to 5, wherein, A reversing valve (8) is arranged in the pipeline (7), which is additionally capable of being fluidly connected to the coolant circuit (6). The reversing valve (8) is configured to interrupt the fluid connection between the motor (2) and the air compressor (4) via the pipeline (7) and switch to fluid connection with the coolant circuit (6) when the clutch (5) is disengaged, so that the coolant in the coolant circuit (6) cools only the motor (2).

7. The auxiliary servo module (1) according to claim 6, wherein, The reversing valve (8) is configured as a two-position three-way reversing valve.

8. The auxiliary servo module (1) according to any one of claims 1 to 7, wherein, The coolant circuit (6) is either the battery system coolant circuit of the commercial vehicle or the electric drive system coolant circuit of the commercial vehicle.

9. A commercial vehicle, wherein, The commercial vehicle includes an auxiliary servo module (1) according to any one of claims 1 to 8.

10. The commercial vehicle according to claim 9, wherein, The commercial vehicles mentioned are either pure electric commercial vehicles or hybrid commercial vehicles.

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