Brake motor cooling system and method

Abstract

The embodiment of the invention provides a brake motor cooling system and method, a brake motor comprises a motor shell, and the brake motor cooling system comprises a brake motor and a valve block; a motor shell of the brake motor is provided with a cooling channel, and an oil inlet and an oil outlet positioned at two ends of the cooling channel; a brake fluid channel, a piston and a transmission device are arranged in the valve block; the brake fluid channel is connected with an oil inlet and an oil outlet of the motor shell through the oil holes to form a brake fluid circulation loop; and the piston and the transmission device are used for driving the brake fluid to flow in the brake fluid circulation loop and cooling the brake motor. The brake fluid channel is connected with the oil inlet and the oil outlet of the motor shell through the oil holes and connected with the cooling channel in the motor shell to form a brake fluid circulation loop, brake fluid flows through the motor shell for cooling, the heat dissipation efficiency of the brake motor is effectively improved, the temperature of the brake motor is reduced, and the service life of the brake motor is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of electric vehicle braking, and in particular to a braking motor cooling system and method. Background Art

[0002] With the rapid development of electric vehicle braking technology, the performance requirements of brake motors, as key components of electric vehicles, are increasing day by day. Especially in high power density applications, brake motors will generate a lot of heat during operation. If the heat cannot be dissipated in a timely and effective manner, the performance and life of the motor will be seriously affected.

[0003] Traditional air cooling may not meet the heat dissipation requirements of the motor in some application scenarios, causing the motor to overheat, affecting its working efficiency and reliability, and may even shorten the service life of the motor.

[0004] Therefore, how to provide a new and efficient motor cooling method to solve the shortcomings of traditional air cooling has become a technical problem that needs to be solved urgently. Summary of the invention

[0005] The purpose of the present application is to solve the problem in the prior art that when the brake motor of an electric vehicle is cooled by air, the heat dissipation demand of the brake motor cannot be met, resulting in overheating of the motor, affecting its working efficiency and reliability, and may even shorten the service life of the brake motor. Therefore, the present application provides a brake motor cooling system and method, which can improve the heat dissipation efficiency and working reliability of the brake motor, and is particularly suitable for brake motors with high power density and long-term operation.

[0006] The present application provides a brake motor cooling method, which improves the heat dissipation efficiency and working reliability of the motor by using brake fluid to flow through the motor housing for cooling. This cooling method can not only effectively solve the shortcomings of traditional air cooling, but also enhance the reliability and service life of the brake motor.

[0007] The embodiment of the present application provides a brake motor cooling system, the brake motor comprises: a motor housing, the brake motor cooling system comprises: a brake motor and a valve block; The motor housing of the brake motor is provided with a cooling channel, and an oil inlet and an oil outlet located at both ends of the cooling channel; The valve block is provided with a brake fluid channel, a piston and a transmission device; The brake fluid channel is connected to the oil inlet and the oil outlet of the motor housing through the oil hole to form a brake fluid circulation loop; The piston and the transmission device are used to drive the brake fluid to flow in the brake fluid circulation loop to cool the brake motor.

[0008] By adopting the above technical solution, the brake fluid channel is connected to the oil inlet and outlet of the motor housing through the oil hole, and is connected to the cooling channel in the motor housing to form a brake fluid circulation loop. The brake fluid flows through the motor housing for cooling, which effectively improves the heat dissipation efficiency of the brake motor, reduces the temperature of the brake motor, and extends the service life of the brake motor.

[0009] In some embodiments, the brake motor includes: a stator, a rotor, and a rotating shaft; The rotating shaft is fixed in the motor housing through the front bearing and the rear bearing; The rotor of the brake motor is connected to the rotating shaft by keyway fit or interference fit; The transmission device connects the rotor and the piston. When the rotor rotates, the transmission device drives the piston to move axially, so that the brake fluid circulates in the brake fluid channel of the valve block and the cooling channel of the housing to cool the brake motor.

[0010] By adopting the above technical solution, the transmission device drives the piston to move axially through the rotation of the rotor, so that the brake fluid flows and generates oil pressure. The brake fluid enters the cooling channel of the motor housing through the brake fluid channel of the valve block, cools the brake motor, and then flows out of the motor housing and returns to the valve block, forming a cycle.

[0011] In some embodiments, the oil inlet is connected to one end of the brake fluid channel of the valve block via a sealing device, and the oil outlet is connected to the other end of the brake fluid channel of the valve block via a sealing device.

[0012] By adopting the above technical solution, the oil inlet and the oil outlet are sealed with the brake fluid channel through the sealing device to prevent the brake fluid from leaking.

[0013] In some embodiments, a sealing device includes: a sealing groove and a sealing ring installed in the sealing groove, used to prevent leakage of brake fluid; The valve block is bolted to the motor housing through the flange surface; The flange surface provides space for setting a sealing groove, which is convenient for setting a sealing ring to increase the sealing performance.

[0014] By adopting the above technical solution, the motor housing and the valve block are connected through the flange surface and bolts. At the same time, the flange surface is connected to the outside of the motor housing, which provides sufficient space for the setting of the sealing groove. The sealing ring is used to increase the sealing performance, ensure the stability and reliability of the brake motor cooling system, and enhance the working reliability of the brake motor.

[0015] In some embodiments, the brake fluid channel of the valve block is provided with three groups of oil holes, which are respectively connected to the oil inlet of the motor housing, the oil outlet of the motor housing, and the external pipeline. The external pipeline is used to introduce the brake fluid from an external source into the valve block, or to discharge the cooled brake fluid from the valve block to other system parts or a fluid storage device.

[0016] In some embodiments, the cooling channels are arranged circumferentially along the motor housing.

[0017] In some embodiments, the cooling channel is "S" shaped in its extending direction.

[0018] In some embodiments, the cross-sectional shape of the cooling channel is circular or rectangular.

[0019] By adopting the above technical solution, the cooling channels are evenly arranged in the motor housing. The shape and curvature of the cooling channels can reduce fluid resistance, improve flow efficiency, and ensure that the brake fluid can flow through the cooling channels evenly and efficiently, thereby effectively taking away the heat generated by the motor.

[0020] The embodiment of the present application also provides a brake motor cooling method, comprising: a brake motor and a valve block; The brake motor comprises: a motor housing; The motor housing of the brake motor is provided with a cooling channel, and an oil inlet and an oil outlet located at both ends of the cooling channel; The valve block is provided with a brake fluid channel, a piston and a transmission device; The brake fluid channel is connected to the oil inlet and the oil outlet of the motor housing through the oil hole to form a brake fluid circulation loop; The piston and the transmission device are used to drive the brake fluid to flow in the brake fluid circulation loop to cool the brake motor.

[0021] The embodiment of the present application provides a brake motor cooling system and method, which arranges a cooling channel in the motor housing and connects it to the brake fluid channel in the valve block, so that the brake fluid flows through the motor housing for cooling, effectively improving the heat dissipation efficiency of the brake motor, reducing the temperature of the brake motor, and extending the service life of the brake motor; the cooling method of the brake fluid flowing through the cooling channel and the brake fluid channel not only improves the heat dissipation efficiency, but also ensures the stability and reliability of the brake motor cooling system through reasonable connection and sealing design, and enhances the working reliability of the brake motor; it is particularly suitable for brake motors that require high power output and long-term operation, and has broad application prospects. At the same time, the cooling method can also provide reference and reference for the cooling of other similar equipment; in short, the present application cools the brake motor by passing the brake fluid through the motor housing, effectively solving the shortcomings of traditional air cooling, improving the heat dissipation efficiency and working reliability of the brake motor, and has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the three-dimensional structure of a brake motor cooling system according to an embodiment of the present application; Figure 2 This is a front view of a brake motor cooling system according to an embodiment of the present application; Figure 3 A schematic diagram of the three-dimensional structure of a motor housing of a brake motor according to an embodiment of the present application; Figure 4 A schematic diagram of the three-dimensional structure of a valve block according to an embodiment of the present application; Description of reference numerals: 100. Brake motor; 1. Motor housing; 2. Stator; 3. Rotor; 4. Rotating shaft; 5. Rear bearing; 6. Front bearing; 7. Bolts; 11. Flange surface; 101, cooling channel; 102, oil inlet; 103, sealing groove; 104, oil outlet; 200, valve block; 8. Transmission device; 9. Piston; 10. Brake fluid channel; 201, threaded hole; 202, first oil hole; 203, second oil hole; 204, third oil hole. DETAILED DESCRIPTION

[0023] The following specific embodiments illustrate the implementation of the present application, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Although the description of the present application will be introduced in conjunction with some embodiments, this does not mean that the features of this application are limited to the implementation. On the contrary, the purpose of introducing the application in conjunction with the implementation is to cover other options or modifications that may be extended based on the claims of the present application. In order to provide a deep understanding of the present application, the following description will include many specific details. The present application can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present application, some specific details will be omitted in the description. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0024] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0025] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0026] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0027] In the description of the present application, it should be understood that in the present application, "electrical connection" can be understood as physical contact and electrical conduction between components; it can also be understood as a form in which different components in the circuit structure are connected through physical lines such as printed circuit board (PCB) copper foil or wires that can transmit electrical signals. "Coupled by..." can be understood as electrical conduction through air by indirect coupling. Indirect coupling can be understood as contactless coupling, in which, it can be understood by those skilled in the art that the coupling phenomenon refers to the phenomenon that there is close cooperation and mutual influence between the input and output of two or more circuit elements or electrical networks, and energy is transmitted from one side to the other through interaction. In order to make the purpose, technical solution and advantages of the present application clearer, the implementation method of the present application will be further described in detail below in conjunction with the accompanying drawings.

[0028] With the rapid development of electric vehicle braking technology, the requirements for brake motor performance are increasing. Especially in high power density applications, the heat dissipation problem of brake motors has become particularly prominent. Traditional air cooling may not meet the heat dissipation requirements of brake motors in some application scenarios. Therefore, it is particularly important to develop a new and efficient motor cooling method.

[0029] In response to the above technical problems, this application proposes a brake motor cooling system and method, the technical concept of which is to improve the heat dissipation efficiency and working reliability of the motor by using brake fluid to flow through the motor housing for cooling. This method can not only effectively solve the shortcomings of traditional air cooling, but also enhance the reliability and service life of the brake motor. It is also particularly suitable for brake motors that require high power output and long-term operation, and can effectively solve the problem of insufficient heat dissipation in traditional air cooling methods.

[0030] See also Figure 1 , Figure 1 It is a schematic diagram of the three-dimensional structure of the brake motor cooling system according to an embodiment of the present application.

[0031] like Figure 1 As shown, an embodiment of the present application provides a brake motor cooling system, wherein the brake motor 100 includes: a motor housing 1; and the brake motor cooling system includes: the brake motor 100 and a valve block 200.

[0032] Specifically, an embodiment of the present application provides a brake motor cooling system, which cools the brake motor 100 by allowing brake fluid to flow through the motor housing 1 of the brake motor 100 to improve the cooling efficiency and working reliability of the brake motor 100.

[0033] Figure 2 This is a front view of the brake motor cooling system of an embodiment of the present application. Figure 3 Schematic diagram of the three-dimensional structure of the motor housing of the brake motor of the embodiment of the present application, Figure 4 Schematic diagram of the three-dimensional structure of the valve block of the embodiment of the present application, as shown in Figure 1~Figure 4 As shown, the motor housing 1 is provided with a cooling channel 101, and the cooling channel 101 is connected to the brake fluid channel 10 of the valve block 200 to form a flow channel for the brake fluid, which is used to cool the brake motor 100 through the flow channel for the brake fluid. The motor housing 1 has a flange surface 11, and the valve block 200 is provided with a threaded hole 201. The motor housing 1 is bolted to the valve block 200 through the flange surface 11 by bolts 7.

[0034] Further, such as Figure 3 and Figure 4 As shown, in the present application, a cooling channel 101 and an oil inlet 102 and an oil outlet 104 are arranged on the motor housing 1 of the brake motor 100 ; a brake fluid channel 10 , a piston 9 and a transmission device 8 are arranged in the valve block 200 .

[0035] In the embodiment of the present application, the brake fluid channel 10 is connected to the oil inlet 102 and the oil outlet 104 of the motor housing 1 through oil holes, and is connected to the cooling channel 101 in the motor housing 1 to form a brake fluid circulation loop. The brake fluid flows through the motor housing 1 for cooling, which effectively improves the heat dissipation efficiency of the brake motor 100, reduces the temperature of the brake motor 100, and extends the service life of the brake motor 100.

[0036] Optionally, the brake fluid channel 10 of the valve block 200 is provided with three groups of oil holes, which are respectively connected to the oil inlet 102 of the motor housing 1, to the oil outlet 104 of the motor housing 1, and to an external pipeline, and the external pipeline is used to introduce brake fluid from an external source into the valve block 200, or to discharge the cooled brake fluid from the valve block 200 to other system parts or a fluid storage device.

[0037] Specifically, the brake fluid channel 10 is connected to the oil inlet 102 and the oil outlet 104 of the motor housing 1 through the oil hole to form a brake fluid circulation loop. Figure 4 As shown, a threaded hole 201 is provided on the valve block 200, which is used together with the bolt 7 to realize the bolt connection with the brake motor 100; a first oil hole 202 is also provided on the valve block 200, which is connected to the oil inlet 102 of the motor housing 1; a second oil hole 203 is also provided on the valve block 200, which is connected to the oil outlet 104 of the motor housing 1; a third oil hole 204 is also provided on the valve block 200, which is connected to an external pipeline, and the external pipeline is used to introduce brake fluid from an external source into the valve block 200, or to guide the cooled brake fluid from the valve block 200 to other system parts or a fluid storage device.

[0038] Optionally, the first oil hole 202 , the second oil hole 203 and the third oil hole 204 are each provided in pair, and are provided corresponding to the oil inlet 102 and the oil outlet 104 on the motor housing 1 .

[0039] In the embodiment of the present application, in order to achieve uniform heat dissipation for the motor housing 1, two oil inlets 102 are provided, and correspondingly, two oil outlets 104 are provided, wherein one oil inlet is connected to one oil outlet correspondingly, and the other oil inlet is connected to the other oil outlet correspondingly, dividing the circumference of the motor housing 1 into two equal parts, and a cooling channel 101 is provided on each part.

[0040] In the present application, the motor housing 1 has an oil inlet 102 and an oil outlet 104, and the cooling channel 101 is connected to the brake fluid channel 10 of the valve block 200 through the oil inlet 102 and the oil outlet 104. The connection should include a sealing device (the motor housing 1 has a sealing groove 103 for installing a sealing ring) to avoid leakage of the brake fluid.

[0041] Optional, such as Figure 3As shown, the oil inlet 102 is connected to one end of the brake fluid channel 10 of the valve block 200 through a sealing device, and the oil outlet 104 is connected to the other end of the brake fluid channel 10 of the valve block 200 through a sealing device. Exemplarily, the sealing device includes: a sealing groove 103 and a sealing ring installed in the sealing groove 103, which is used to prevent the leakage of the brake fluid; the valve block 200 is connected to the motor housing 1 by bolts 7 through the flange surface 11; the flange surface 11 provides a space for setting the sealing groove 103, which is convenient for setting the sealing ring to increase the sealing performance.

[0042] Specifically, when the flange surface 11 is not provided, due to the limited thickness of the motor housing 1, after the oil inlet 102 and the oil outlet 104 are provided, there is no additional space for sealing the oil inlet 102 and the oil outlet 104. After the flange surface 11 is provided, on the one hand, the motor housing 1 and the valve block 200 can be fixed, and on the other hand, space is provided for providing a sealing device.

[0043] In the embodiment of the present application, the piston 9 and the transmission device 8 are used to drive the brake fluid to flow in the brake fluid circulation loop to cool the brake motor 100, wherein the brake fluid circulation loop is obtained by connecting the brake fluid channel 10 and the cooling channel 101.

[0044] Furthermore, the brake motor 100 includes: a stator 2, a rotor 3 and a rotating shaft 4; the rotating shaft 4 is fixed in the motor housing 1 through a front bearing 6 and a rear bearing 5; the rotor 3 and the rotating shaft 4 of the brake motor 100 are connected through a keyway fit or an interference fit; the transmission device 8 connects the rotor 3 and the piston 9, and when the rotor 3 rotates, the piston 9 is driven to move axially through the transmission device 8, so that the brake fluid circulates in the brake fluid channel 10 of the valve block 200 and the cooling channel 101 of the housing, which is used to cool the brake motor 100.

[0045] In the embodiment of the present application, the rotating shaft 4 of the brake motor 100 is fixed to the motor housing 1 through the front bearing 6 and the rear bearing 5, and the rotor 3 of the brake motor 100 is connected to the rotating shaft 4 through a keyway fit or an interference fit. The rotor 3 rotates with the rotating shaft 4, and the piston 9 is driven to move axially through the transmission device 8, so that the brake fluid flow channel generates oil pressure. The flowing brake fluid flows in the brake fluid channel 10 of the valve block 200 and the cooling channel 101 of the motor housing 1.

[0046] In summary, the brake fluid channel 10 is connected to the oil inlet 102 and the oil outlet 104 of the motor housing 1 through the oil hole, and is connected to the cooling channel 101 in the motor housing 1 to form a brake fluid circulation loop. The brake fluid flows through the motor housing 1 for cooling, which effectively improves the heat dissipation efficiency of the brake motor 100, reduces the temperature of the brake motor 100, and prolongs the service life of the brake motor 100; the transmission device 8 drives the piston 9 to move axially through the rotation of the rotor 3, so that the brake fluid flows and generates oil pressure. The brake fluid enters the cooling channel 101 of the motor housing 1 through the brake fluid channel 10 of the valve block 200, cools the brake motor 100, and then flows out of the motor housing 1 and returns to the valve block 200 to form a cycle; the motor housing 1 and the valve block 200 are connected through the flange surface 11 and the bolt 7. At the same time, the flange surface 11 is externally connected to the motor housing 1, which provides sufficient space for the setting of the sealing groove 103, and the sealing is increased by the sealing ring, which ensures the stability and reliability of the cooling system of the brake motor 100 and enhances the working reliability of the brake motor 100.

[0047] In order to achieve efficient and uniform heat dissipation for the motor housing 1 , the arrangement of the cooling channels will be described below.

[0048] like Figure 1 and Figure 3 As shown, the cooling channels 101 are arranged along the circumference of the motor housing 1. By evenly arranging the cooling channels 101 in the motor housing 1, the cooling efficiency of the motor housing 1 can be improved.

[0049] Specifically, the cooling channel 101 is “S”-shaped in its extension direction; the cross-sectional shape of the cooling channel 101 is circular or rectangular.

[0050] Optionally, the motor housing 1 can be divided into a heat dissipation area and a non-heat dissipation area, and the cooling channels 101 are evenly arranged in the heat dissipation area.

[0051] like Figure 3 As shown, the cooling channel 101 presents a special "S" shape - "U" shape, and each cooling channel 101 has a bottom and two upwardly curved side walls to form a " U "-shaped cross section, that is, the width of the upper bottom and the lower bottom of the "S" shape are equal and equal to the interval between the two upwardly curved side walls.

[0052] Optionally, the size of each “S” shape is different, and is set according to the degree of heat received by the motor housing 1 in actual operation, and is manifested as a plurality of “S” shapes of varying sparseness in the extension direction of the cooling channel 101 .

[0053] In the embodiment of the present application, the arrangement of the cooling channel 101 on the motor housing 1 is a core design element, which not only affects the heat dissipation efficiency of the motor, but also directly relates to the reliability and service life of the entire cooling system. Some arrangements of arranging the cooling channel 101 on the motor housing 1 are provided below.

[0054] The first type is a surrounding arrangement, which ensures sufficient heat dissipation capacity and avoids excessive flow resistance by accurately calculating the cross-sectional area and flow rate of the cooling channel 101. The cooling channel 101 can be designed as a ring structure surrounding the motor housing 1 to ensure that the brake fluid can flow evenly through all parts of the motor to achieve comprehensive heat dissipation. This arrangement is particularly suitable for motors that require high heat dissipation efficiency.

[0055] The second type is radial radiation arrangement. By reasonably designing the number and angle of branches of the cooling channel 101, the uniformity of heat dissipation and the avoidance of flow dead zones are ensured. The cooling channel 101 starts from a certain center point or axis of the motor housing 1 and extends radially outward to form a spoke-like structure. This arrangement can focus on cooling specific heating areas of the brake motor 100.

[0056] The third type is spiral arrangement. By calculating the spiral path, the continuity and uniformity of the flow are ensured to avoid excessive pressure loss. The cooling channel 101 is arranged in a spiral shape on the motor housing. The brake fluid flows along the spiral path and gradually covers the entire motor housing. This arrangement combines the advantages of the surrounding and axial flows.

[0057] The fourth type is a partitioned arrangement, which ensures the balance and efficient operation of the entire cooling system by evaluating the heat dissipation requirements and flow resistance of each heat dissipation area. According to the heating condition and heat dissipation requirements of the brake motor 100, the motor housing 1 is divided into different heat dissipation areas, and each heat dissipation area is provided with an independent cooling channel 101. This arrangement can be used to perform personalized heat dissipation design for different parts of the brake motor 100.

[0058] The fifth type is a combined arrangement, which comprehensively considers the mutual influence and constraints of various arrangements, conducts careful design and optimization, and combines the above-mentioned arrangements to form a combined arrangement of cooling channels 101. For example, a radial radiation arrangement can be used in the main heat-generating area of ​​the motor housing 1, while a surrounding or spiral arrangement can be used in other areas.

[0059] It should be noted that the arrangement of the cooling channel 101 in the embodiments of the present application is to achieve the purpose of improving the heat dissipation efficiency of the motor, and any arrangement that can improve the heat dissipation efficiency is within the protection scope of the present application.

[0060] By adopting the above technical solution, the cooling channel 101 is evenly arranged in the motor housing 1. The shape and curvature of the cooling channel 101 can reduce fluid resistance, improve flow efficiency, and ensure that the brake fluid can flow through the cooling channel 101 evenly and efficiently, thereby effectively taking away the heat generated by the motor.

[0061] The embodiment of the present application also provides a method for cooling a brake motor 100, wherein the brake motor 100 comprises: a motor housing 1, comprising: a brake motor 100 and a valve block 200; The motor housing 1 of the brake motor 100 is provided with a cooling channel 101, and an oil inlet 102 and an oil outlet 104 located at both ends of the cooling channel 101; The valve block 200 is provided with a brake fluid channel 10, a piston 9 and a transmission device 8; The brake fluid channel 10 is connected to the oil inlet 102 and the oil outlet 104 of the motor housing 1 through the oil hole to form a brake fluid circulation loop; The piston 9 and the transmission device 8 are used to drive the brake fluid to flow in the brake fluid circulation loop to cool the brake motor 100 .

[0062] The embodiment of the present application provides a brake motor cooling system and method, which effectively improves the heat dissipation efficiency of the brake motor by utilizing brake fluid to flow through the motor housing for cooling, and solves the shortcomings of traditional air cooling. Due to the improved heat dissipation efficiency, the temperature and thermal stress of the brake motor are reduced, thereby enhancing the reliability and service life of the motor. It is particularly suitable for brake motors that require high power output and long-term operation, and has broad application prospects. Cooling by allowing brake fluid to flow through the motor housing effectively solves the shortcomings of traditional air cooling, improves the heat dissipation efficiency and working reliability of the motor, and has significant technical effects and broad application prospects.

[0063] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and modifications of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and modifications.

Claims

1. A brake motor cooling system, the brake motor comprising: The motor housing is characterized in that the brake motor cooling system comprises: a brake motor and a valve block; The motor housing of the brake motor is provided with a cooling channel, and an oil inlet and an oil outlet located at both ends of the cooling channel; The valve block is provided with a brake fluid channel, a piston and a transmission device; The brake fluid channel is connected to the oil inlet and the oil outlet of the motor housing through the oil hole to form a brake fluid circulation loop; The piston and the transmission device are used to drive the brake fluid to flow in the brake fluid circulation loop to cool the brake motor.

2. The brake motor cooling system according to claim 1, characterized in that: The brake motor comprises: a rotor and a rotating shaft; The rotating shaft is fixed in the motor housing through a front bearing and a rear bearing; The rotor of the brake motor is connected to the rotating shaft by keyway fit or interference fit; The transmission device connects the rotor and the piston. When the rotor rotates, the transmission device drives the piston to move axially, so that the brake fluid circulates in the brake fluid channel of the valve block and the cooling channel of the housing to cool the brake motor.

3. The brake motor cooling system according to claim 1, characterized in that: The oil inlet is connected to one end of the brake fluid channel of the valve block through a sealing device, and the oil outlet is connected to the other end of the brake fluid channel of the valve block through the sealing device.

4. The brake motor cooling system according to claim 3, characterized in that: The sealing device comprises: a sealing groove and a sealing ring installed in the sealing groove, used to prevent the brake fluid from leaking; The valve block is bolted to the motor housing via a flange surface; The flange surface provides a space for arranging the sealing groove, which facilitates the arrangement of the sealing ring to increase the sealing performance.

5. The brake motor cooling system according to claim 3, characterized in that: The brake fluid channel of the valve block is provided with three groups of oil holes, which are respectively connected to the oil inlet of the motor housing, the oil outlet of the motor housing, and an external pipeline. The external pipeline is used to introduce the brake fluid from an external source into the valve block, or to guide the cooled brake fluid from the valve block to other system parts or a fluid storage device.

6. The brake motor cooling system according to claim 1, characterized in that: The cooling channels are arranged along the circumference of the motor housing.

7. The brake motor cooling system according to claim 1, characterized in that: The cooling channel is "S" shaped in its extending direction.

8. The brake motor cooling system according to claim 1, characterized in that: The cross-sectional shape of the cooling channel is circular or rectangular.

9. A brake motor cooling method, characterized in that: include: Brake motor and valve block; The brake motor comprises: a motor housing; The motor housing of the brake motor is provided with a cooling channel, and an oil inlet and an oil outlet located at both ends of the cooling channel; The valve block is provided with a brake fluid channel, a piston and a transmission device; The brake fluid channel is connected to the oil inlet and the oil outlet of the motor housing through the oil hole to form a brake fluid circulation loop; The piston and the transmission device are used to drive the brake fluid to flow in the brake fluid circulation loop to cool the brake motor.

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