Motor cooling system

Abstract

The utility model provides a motor cooling system, which comprises an electronic pump motor (1), and is characterized in that an output shaft (11) of the electronic pump motor (1) is connected in series with a plurality of electronic pumps (2) through a key connection structure, the electronic pump motor (1) is a low-power motor, and the plurality of electronic pumps (2) are low-voltage electronic pumps; according to the technical scheme, the cost can be reduced, the energy efficiency can be improved, the manufacturing cost is remarkably reduced by adopting the scheme that the multiple low-voltage electronic pumps are adopted to replace traditional high-voltage electronic pumps and proportional valves, meanwhile, the multiple electronic pumps can be driven only through one low-power motor, and the energy efficiency is remarkably improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of new energy vehicle motor cooling technology, and specifically relates to a motor cooling system. Background Art

[0002] High-voltage electronic pumps play a pivotal role in the motor cooling system of new energy vehicles, ensuring the efficient operation of the motor cooling system by stably providing high pressure and flow. However, in the special field of new energy mining trucks, since the vehicle's load capacity far exceeds that of ordinary vehicles, reaching more than 100 tons, it is necessary to carry a higher-power motor to meet its power requirements.

[0003] These high-power motors generate a lot of heat during operation, especially under high load and long-term operation. To ensure that the motor temperature is always maintained within a safe range, the cooling system must have a higher heat dissipation capacity and a larger coolant flow rate. In addition, given the special working conditions and high-intensity use of mining truck motors, the reliability requirements for the cooling system have also reached an extreme.

[0004] In order to increase the power of the drive system, new energy mining trucks usually use multiple motors, sometimes even up to four motors. This configuration undoubtedly brings greater challenges to the cooling system. At present, the common solution in the industry is to use a high-pressure electronic pump combined with multiple proportional valves, but this solution is not only expensive to manufacture, but also relatively difficult to maintain.

[0005] Therefore, in the field of new energy mining trucks, there is still a gap in cooling solutions for multiple motors. There is an urgent need to provide a cooling system solution that can not only meet the heat dissipation needs of high-power motors, but also has high reliability and economy. Utility Model Content

[0006] In order to solve the defects and shortcomings in the prior art, the utility model provides a motor cooling system.

[0007] The technical solution provided by the utility model is as follows:

[0008] A motor cooling system includes an electronic pump motor, characterized in that: the output shaft of the electronic pump motor is connected in series with multiple electronic pumps through a key connection structure, and the electronic pump motor uses a low-power motor, and the multiple electronic pumps all use low-voltage electronic pumps.

[0009] As a further preferred embodiment of the present invention, four electronic pumps are provided, and all of them have a capacity of 10cc.

[0010] As a further preferred embodiment of the present invention, a plurality of the electronic pumps are connected in sequence, and a positioning connection portion is provided between adjacent electronic pumps.

[0011] As a further preferred embodiment of the present invention, the key connection structure includes a plurality of groups of splines fixedly sleeved on the output shaft of the electronic pump motor, and each group of splines is correspondingly matched and connected with a spline groove provided on the inner wall of each electronic pump.

[0012] As a further preferred embodiment of the utility model, it also includes a cooling oil chamber and a vehicle drive motor, wherein the cooling oil in the cooling oil chamber is connected to the electronic pump through a cooling oil circuit, and the cooling oil inside the electronic pump is connected to the vehicle drive motor through the cooling oil circuit;

[0013] When there are multiple vehicle drive motors, each vehicle drive motor is connected to an electronic pump, and the multiple electronic pumps are connected in series in sequence and are all connected to the cooling oil chamber.

[0014] Furthermore, the utility model also provides a motor cooling system, including an electronic pump motor, characterized in that: the output shaft of the electronic pump motor is connected in parallel with multiple electronic pumps through a gear connection assembly, and the electronic pump motor uses a low-power motor, and the multiple electronic pumps all use low-voltage electronic pumps.

[0015] As a further preferred embodiment of the present invention, four electronic pumps are provided, and all of them have a capacity of 10cc.

[0016] As a further preferred embodiment of the present invention, the plurality of electronic pumps are evenly distributed along the periphery of the electronic pump motor.

[0017] As a further preferred embodiment of the utility model, the gear connection assembly includes a connection input gear fixedly connected to the output shaft of the electronic pump motor, and an output gear fixedly connected to the electronic pump, and the input gear is meshed with the output gear accordingly;

[0018] The output gear is fixedly connected to the electronic pump shaft, and the electronic pump shaft is inserted into the interior of the electronic pump and is key-connected thereto.

[0019] As a further preferred embodiment of the utility model, it also includes a cooling oil chamber and a vehicle drive motor, wherein the cooling oil in the cooling oil chamber is connected to the electronic pump through a cooling oil circuit, and the cooling oil inside the electronic pump is connected to the vehicle drive motor through the cooling oil circuit;

[0020] When there are multiple vehicle drive motors, each vehicle drive motor is connected to an electronic pump, the multiple electronic pumps are connected in parallel and are evenly spaced at the periphery of the electronic pump motor, and the multiple electronic pumps are all connected to the cooling oil chamber.

[0021] Compared with the prior art, the beneficial effects achieved by the utility model include:

[0022] 1) The utility model provides a motor cooling system, which can achieve cost reduction and energy efficiency improvement. By adopting multiple low-voltage electronic pumps to replace the traditional high-voltage electronic pump and proportional valve solution, the manufacturing cost is significantly reduced. At the same time, only one relatively low-power motor can drive multiple electronic pumps, achieving a significant improvement in energy efficiency.

[0023] 2) The utility model provides a motor cooling system with enhanced product flexibility and reliability. By using four 10cc electronic pumps to replace a 45cc electronic pump, it not only solves the problem of product specification mismatch on the market, but also enhances the flexibility and reliability of the system.

[0024] 3) The utility model provides a motor cooling system that can achieve efficient fluid control. Through the two proposed low-voltage electronic pump connection methods (series and parallel), more economical and efficient fluid control is achieved, meeting the heat dissipation requirements of high-power motors under different working conditions.

[0025] 4) The utility model provides a motor cooling system, which effectively realizes space optimization and layout flexibility. The flexible connection method can reduce the system size, make the space utilization of the whole vehicle more reasonable, and adopt different layout schemes according to different vehicle space requirements.

[0026] 5) The utility model provides a motor cooling system to simplify maintenance and operation. By adopting a low-voltage electronic pump combination system, the maintenance difficulty is reduced, the operation process is simplified, and the reliability and service life of the overall system are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a structural side view of the series cooling system provided by the utility model.

[0028] Figure 2 This is a top view of the structure of the series cooling system provided by the utility model.

[0029] Figure 3 This is a cross-sectional view of the electronic pump of the series cooling system provided by the utility model.

[0030] Figure 4 This is a diagram of the oil circuit structure of the series cooling system provided by the utility model.

[0031] Figure 5 This is a structural side view of the parallel cooling system provided by the utility model from a first viewing angle.

[0032] Figure 6This is a structural side view of the parallel cooling system provided by the utility model from a second viewing angle.

[0033] Figure 7 This is a cross-sectional view of the electronic pump of the parallel cooling system provided by the utility model.

[0034] Figure 8 This is a structural schematic diagram of the gear connection assembly of the parallel cooling system provided by the utility model.

[0035] Fig. 9 This is a diagram of the oil circuit structure of the parallel cooling system provided by the utility model. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0037] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0038] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" 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 an indirect connection 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 the present invention can be understood according to specific circumstances.

[0039] The present invention aims to provide a motor cooling system, which works through multiple low-voltage electronic pumps in different connection modes, and can replace the traditional high-voltage electronic pump plus proportional valve solution to achieve more economical and efficient fluid control.

[0040] The present invention proposes the following two connection modes:

[0041] [First embodiment]

[0042] like Figure 1-4 FIG. 1 is a motor cooling system provided by the first embodiment of the utility model. Figure 1-2 As shown, it includes an electronic pump motor 1, and the output shaft 11 of the electronic pump motor 1 is connected in series with multiple electronic pumps 2 through a key connection structure, and the multiple electronic pumps 2 are all low-voltage electronic pumps. Correspondingly, the electronic pump motor 1 uses a low-power motor. Since multiple low-voltage electronic pumps are used, the system no longer needs a high-power motor required for a high-voltage electronic pump. Traditional high-voltage electronic pumps usually need to be equipped with a high-power motor to drive their operation, which not only increases the manufacturing cost, but also leads to higher energy consumption. In this solution, only one lower-power motor can be used to drive multiple low-voltage electronic pumps, thereby achieving a significant improvement in energy efficiency.

[0043] In electric vehicles, the power of the motor usually increases as the voltage increases. When the voltage increases, the current through the motor also increases, which increases the torque and rotation speed of the motor, ultimately increasing the power of the motor.

[0044] For commercial vehicles, a 610V voltage platform is generally used to meet the high power requirements. In this embodiment, the low voltage platform used is a 24V voltage platform, which belongs to the low voltage category compared to the 610V voltage platform in the prior art.

[0045] A motor working under a high-voltage platform is generally considered to be a high-power motor, while a motor working under a low-voltage platform is considered to be a low-power motor, that is, the low-power motor in this embodiment is a low-power motor used to drive a 24V electronic pump (low-voltage platform), relative to the high-power motor used to drive a 610V electronic pump (high-voltage platform) in the prior art.

[0046] Furthermore, in this embodiment, four electronic pumps 2 are provided, and all of them are 10cc electronic pumps. Considering that there is no 45cc electronic pump in the prior art, this solution cleverly uses four 10cc electronic pumps as a substitute. This choice not only solves the problem of mismatch of product specifications on the market, but also makes the entire system more flexible and reliable. Through reasonable layout and design, these four electronic pumps together constitute the core part of fluid control.

[0047] like Figure 1 As shown, in the solution provided in this embodiment, a plurality of electronic pumps 2 are connected in sequence, and a positioning connection portion 21 is provided between adjacent electronic pumps 2. The positioning connection portion 21 can be set as Figure 1 The concave-convex snap-fit ​​positioning structure can also be set as a positioning structure of other structural forms according to actual needs to ensure smooth transmission of the fluid.

[0048] As a further preferred implementation of this embodiment, Figure 1 As shown, the key connection structure in this embodiment includes a plurality of groups of splines fixedly mounted on the output shaft 11 of the electronic pump motor 1, and each group of splines is correspondingly connected with the spline grooves provided on the inner wall of each electronic pump 2. This connection method ensures that multiple low-pressure electronic pumps can be driven by only one electronic pump motor, thereby realizing a compact and efficient fluid control system.

[0049] like Figure 4 The figure shows the oil circuit structure diagram of the cooling system provided in this embodiment, which also includes a cooling oil chamber 3 and a vehicle drive motor 4. The cooling oil in the cooling oil chamber 3 is connected to the electronic pump 2 through the cooling oil circuit 5, and the cooling oil inside the electronic pump 2 is connected to the vehicle drive motor 4 through the cooling oil circuit 5.

[0050] It is worth noting that, in this embodiment, the vehicle drive motor 4 may be provided with one or more motors to meet different vehicle drive requirements.

[0051] When there are multiple vehicle drive motors 4 (such as M1-M4 in the figure), each vehicle drive motor 4 is connected to an electronic pump 2, and the multiple electronic pumps 2 are connected in series in sequence and are all connected to the cooling oil chamber 3. A lower-power electronic pump motor M0 can drive multiple low-voltage electronic pumps 2 to operate, so that the cooling oil in the cooling oil chamber 3 is pumped into the corresponding multiple vehicle drive motors through the low-voltage electronic pump 2 as needed to achieve cooling of the corresponding vehicle drive motors.

[0052] [Second embodiment]

[0053] like Figure 5-9 The second embodiment of the utility model shows a motor cooling system, including an electronic pump motor 1. The difference between this embodiment and the first embodiment is that the output shaft 11 of the electronic pump motor 1 is connected in parallel with multiple electronic pumps 2 through a gear connection assembly, and the electronic pump motor 1 uses a low-power motor, and the multiple electronic pumps 2 all use low-voltage electronic pumps. By adopting a parallel connection method, the axial size of the cooling system can be reduced, so that different layout schemes can be adopted according to the space of the whole vehicle.

[0054] In electric vehicles, the power of the motor usually increases as the voltage increases. When the voltage increases, the current through the motor also increases, which increases the torque and rotation speed of the motor, ultimately increasing the power of the motor.

[0055] For commercial vehicles, a 610V voltage platform is generally used to meet the high power requirements. In this embodiment, the low voltage platform used is a 24V voltage platform, which belongs to the low voltage category compared to the 610V voltage platform in the prior art.

[0056] A motor working under a high-voltage platform is generally considered to be a high-power motor, while a motor working under a low-voltage platform is considered to be a low-power motor, that is, the low-power motor in this embodiment is a low-power motor used to drive a 24V electronic pump (low-voltage platform), relative to the high-power motor used to drive a 610V electronic pump (high-voltage platform) in the prior art.

[0057] like Figure 8-9 As shown, when a plurality of electronic pumps 2 are connected in parallel, the plurality of electronic pumps 2 are evenly distributed along the periphery of the electronic pump motor 1 , and the overall arrangement is uniform and stable.

[0058] like Figure 5-6 As shown in FIG8 , the gear connection assembly in this embodiment includes an input gear 1G fixedly connected to the output shaft 11 of the electronic pump motor 1, and an output gear 2G fixedly connected to the electronic pump 2, and the input gear 1G is meshed with the output gear 2G accordingly; by adjusting the speed of the motor and the transmission ratio of the gear, the distribution and regulation of the fluid flow can be achieved.

[0059] Similar to the first embodiment, the output gear 2G is fixedly connected to the electronic pump shaft 22, and the electronic pump shaft 22 is inserted into the inside of the electronic pump 2 and connected to it by a key. Similarly, the electronic pump 2 is provided with 4, and all of them are 10cc electronic pumps. Four 10cc electronic pumps are cleverly used as a replacement. This choice not only solves the problem of mismatching specifications of existing products on the market, but also makes the entire system more flexible and reliable.

[0060] like Fig. 9 The figure shows the oil circuit structure diagram of the cooling system provided in this embodiment, which also includes a cooling oil chamber 3 and a vehicle drive motor 4. The cooling oil in the cooling oil chamber 3 is connected to the electronic pump 2 through the cooling oil circuit 5, and the cooling oil inside the electronic pump 2 is connected to the vehicle drive motor 4 through the cooling oil circuit 5;

[0061] Likewise, if Fig. 9 As shown, in this embodiment, the vehicle driving motor 4 may be provided with one or more (such as M1-M4 in the figure) to meet different vehicle driving requirements.

[0062] When there are multiple vehicle drive motors 4, each vehicle drive motor 4 is connected to an electronic pump 2, and the multiple electronic pumps 2 are connected in parallel and evenly spaced on the periphery of the electronic pump motor 1. The multiple electronic pumps 2 are all connected to the cooling oil chamber 3. A lower-power electronic pump motor M0 can drive multiple low-voltage electronic pumps 2 to operate, so that the cooling oil in the cooling oil chamber 3 is pumped into the corresponding multiple vehicle drive motors through the low-pressure electronic pump 2 as needed to achieve cooling of the corresponding vehicle drive motors; at the same time, the multiple electronic pumps 2 are evenly distributed along the periphery of the electronic pump motor 1, and the overall layout is uniform and stable; in addition, by adjusting the motor speed and the gear ratio, the fluid flow can be distributed and regulated.

[0063] In summary, by using multiple low-voltage electronic pumps to work in different connection modes, the traditional high-voltage electronic pump plus proportional valve solution is replaced. This new motor cooling system has the advantages of low cost, strong flexibility, and low energy consumption, and has broad application prospects in the field of fluid control.

[0064] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A motor cooling system, comprising an electronic pump motor (1), characterized in that: The output shaft (11) of the electronic pump motor (1) is connected in series with a plurality of electronic pumps (2) via a key connection structure, and the electronic pump motor (1) is a low-power motor, and the plurality of electronic pumps (2) are low-voltage electronic pumps.

2. A motor cooling system according to claim 1, characterized in that: Four electronic pumps (2) are provided, and all of them have a capacity of 10 cc.

3. A motor cooling system according to claim 1, characterized in that: The plurality of electronic pumps (2) are connected in sequence, and a positioning connection portion (21) is provided between adjacent electronic pumps (2).

4. The motor cooling system according to claim 1, characterized in that: The key connection structure comprises a plurality of groups of splines fixedly sleeved on the output shaft (11) of the electronic pump motor (1), each group of splines correspondingly matching and connected with a spline groove provided on the inner wall of each electronic pump (2).

5. The motor cooling system according to claim 1, characterized in that: It also includes a cooling oil chamber (3) and a vehicle drive motor (4), wherein the cooling oil in the cooling oil chamber (3) is communicated with the electronic pump (2) via a cooling oil circuit (5), and the cooling oil inside the electronic pump (2) is communicated with the vehicle drive motor (4) via the cooling oil circuit (5); When a plurality of vehicle drive motors (4) are provided, each vehicle drive motor (4) is connected to a corresponding electronic pump (2), and the plurality of electronic pumps (2) are sequentially connected in series and are all in communication with the cooling oil chamber (3).

6. A motor cooling system, comprising an electronic pump motor (1), characterized in that: The output shaft (11) of the electronic pump motor (1) is connected in parallel to a plurality of electronic pumps (2) via a gear connection assembly, and the electronic pump motor (1) is a low-power motor, and the plurality of electronic pumps (2) are low-voltage electronic pumps.

7. A motor cooling system according to claim 6, characterized in that: Four electronic pumps (2) are provided, and all of them have a capacity of 10 cc.

8. The motor cooling system according to claim 6, characterized in that: The plurality of electronic pumps (2) are evenly distributed along the periphery of the electronic pump motor (1).

9. The motor cooling system according to claim 6, characterized in that: The gear connection assembly comprises a connection input gear (1G) fixedly connected to the output shaft (11) of the electronic pump motor (1), and an output gear (2G) fixedly connected to the electronic pump (2), the input gear (1G) being meshed with the output gear (2G) correspondingly; The output gear (2G) is fixedly connected to the electronic pump shaft (22); the electronic pump shaft (22) is inserted into the interior of the electronic pump (2) and is key-connected thereto.

10. The motor cooling system according to claim 6, characterized in that: It also includes a cooling oil chamber (3) and a vehicle drive motor (4), wherein the cooling oil in the cooling oil chamber (3) is communicated with the electronic pump (2) via a cooling oil circuit (5), and the cooling oil inside the electronic pump (2) is communicated with the vehicle drive motor (4) via the cooling oil circuit (5); When a plurality of vehicle drive motors (4) are provided, each vehicle drive motor (4) is connected to a corresponding electronic pump (2), the plurality of electronic pumps (2) are connected in parallel and are evenly spaced on the periphery of the electronic pump motor (1), and the plurality of electronic pumps (2) are all in communication with the cooling oil chamber (3).

Images