Water pump, engine cooling system and vehicle

Abstract

The invention provides a water pump, an engine cooling system and a vehicle. The water pump comprises a motor mounting cylinder, a mounting plate and a motor. The first end of the motor mounting cylinder is an opening, the mounting plate is mounted at the first end of the motor mounting cylinder, and the motor is mounted in the motor mounting cylinder; the mounting plate is provided with a limiting structure, and the limiting structure protrudes towards the interior of the motor mounting cylinder so as to limit the motor from moving towards the mounting plate. The maintenance efficiency of the water pump is high.

Description

Technical Field

[0001] The present disclosure relates to the technical field of vehicle engines, and in particular to a water pump, an engine cooling system and a vehicle. Background Art

[0002] The vehicle's engine generates a lot of heat during operation. To ensure that the engine operates within the optimal temperature range, the vehicle is generally equipped with an engine cooling system dedicated to dissipating heat from the engine. The engine cooling system includes a water pump and a coolant circulation loop. The water pump is used to drive the coolant to circulate in the coolant circulation loop to remove the heat emitted by the engine.

[0003] In the related art, a water pump is generally composed of a housing and a motor installed in the housing. The housing is generally an integral design, and the motor is embedded in the housing.

[0004] In this way, the installation of the motor and the housing in the water pump is relatively complicated, resulting in a cumbersome and time-consuming disassembly and assembly process of the water pump, and a low maintenance efficiency of the water pump. Summary of the invention

[0005] In view of this, the present disclosure provides a water pump, an engine cooling system, and a vehicle, wherein the water pump has a high maintenance efficiency.

[0006] Specifically, the following technical solutions are included:

[0007] In a first aspect, a water pump is provided, comprising a motor mounting barrel, a mounting plate and a motor;

[0008] The first end of the motor mounting tube is an opening, the mounting plate is mounted on the first end of the motor mounting tube, and the motor is mounted in the motor mounting tube;

[0009] The mounting plate has a limiting structure, and the limiting structure protrudes into the motor mounting tube to limit the movement of the motor toward the mounting plate.

[0010] Optionally, the outer edge of the first end of the motor mounting tube has a first mounting structure, and the outer edge of the mounting plate has a second mounting structure, and the first mounting structure cooperates with the second mounting structure to achieve the installation of the mounting plate and the motor mounting tube.

[0011] Optionally, the first mounting structure and the second mounting structure include bolt holes, and the water pump further includes a first fixing member, and the first fixing member passes through the first mounting structure and the second mounting structure and is tightened.

[0012] Optionally, the side wall of the motor mounting cylinder has a third mounting structure, and the motor is fixedly mounted in the motor mounting cylinder through the third mounting structure.

[0013] Optionally, the third mounting structure is a through hole, and the water pump includes a second fixing member, and the second fixing member passes through the third mounting structure and is fixedly connected to the motor.

[0014] Optionally, the water pump further includes an impeller and an impeller connector, the motor includes a rotor shaft, the second end of the motor mounting cylinder has a second opening, the second end of the rotor shaft extends out of the second opening, and the second end of the rotor shaft has a rotor shaft bolt hole;

[0015] The impeller connecting member comprises a limiting head and a connecting portion, the connecting portion is screwed into the bolt hole of the rotor shaft, and the limiting head limits the impeller to rotate coaxially with the rotor shaft.

[0016] Optionally, the motor further includes a motor lead wire, and the water pump further includes a control element;

[0017] The control element is mounted on a side of the mounting plate away from the motor mounting cylinder;

[0018] The mounting plate has a lead-out port, and the motor lead-out wire passes through the lead-out port and is connected to the control element.

[0019] Optionally, the impeller connector and the rotor shaft have connected coolant circulation holes, and the coolant circulation holes are connected to the mounting plate.

[0020] In a second aspect, an embodiment of the present disclosure provides an engine cooling system, comprising a water pump as described above.

[0021] In a third aspect, an embodiment of the present disclosure provides a vehicle, comprising a water pump as described above, or comprising an engine cooling system as described above.

[0022] The disclosed embodiments provide a water pump, an engine cooling system, and a vehicle. The motor of the water pump is installed in a motor mounting cylinder, and the first end of the motor mounting cylinder is an opening, so when there is a need to replace or repair the motor later, the motor can be quickly taken out with the help of the opening. The first end of the motor mounting cylinder is installed together with the mounting plate, which can ensure that when there is no need to repair or replace the motor, the motor is effectively encapsulated to prevent the motor from being damaged. In addition, the mounting plate also has a limiting structure protruding into the interior of the motor mounting cylinder, and the limiting structure can limit the movement of the motor toward the mounting plate, thereby achieving limiting of the motor and improving the installation accuracy and efficiency of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 A schematic cross-sectional view of a water pump provided in an embodiment of the present disclosure;

[0025] Figure 2 A three-dimensional diagram of a water pump provided in an embodiment of the present disclosure;

[0026] Figure 3 An exploded schematic diagram of a water pump provided in an embodiment of the present disclosure;

[0027] Figure 4 for Figure 1 An enlarged view of the structure shown at box A;

[0028] Figure 5 for Figure 1 The coolant circulation path inside the structure shown.

[0029] The reference numerals in the figures represent respectively:

[0030] 10-motor mounting cylinder; 101-first mounting structure; 102-third mounting structure; 103-second opening; 104-coolant return hole; 105-first limiting step;

[0031] 20-mounting plate; 201-limiting structure; 2011-accommodating groove; 20111-second limiting step; 202-second mounting structure; 203-lead outlet; 204-third limiting step;

[0032] 30-motor; 301-rotor shaft; 3011-rotor shaft bolt hole; 302-motor lead wire;

[0033] 40- first fixing member;

[0034] 50- second fixing member;

[0035] 60- impeller; 601- first convex ring; 602- second convex ring; 603- first sealing ring;

[0036] 70- impeller connecting piece; 701- limiting head; 702- connecting part; 703- cooling liquid flow hole;

[0037] 80-control element;

[0038] 901-first bearing; 902-second bearing;

[0039] 100-shielding sleeve; 1001-shielding sleeve sealing ring.

[0040] The above drawings show clear embodiments of the present disclosure, which will be described in more detail below. These drawings and text descriptions are not intended to limit the scope of the present disclosure in any way, but to illustrate the concepts of the present disclosure to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0042] The directional nouns involved in the embodiments of the present disclosure, such as "upper", "lower", "side", etc., are generally based on the relative directional relationship between the structures when the water pump is usually arranged, and these directional nouns are used only to more clearly describe the relationship between the structures, not to describe the absolute directional. When the water pump is placed in different postures, the directional position may change, for example, "upper" and "lower" may be interchangeable.

[0043] Unless otherwise defined, all technical terms used in the embodiments of the present disclosure have the same meanings as commonly understood by those of ordinary skill in the art.

[0044] In order to make the technical solutions and advantages of the present disclosure more clear, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

[0045] In a first aspect, an embodiment of the present disclosure provides a water pump. Figure 1-4 , the water pump comprises a motor mounting cylinder 10, a mounting plate 20 and a motor 30;

[0046] The first end of the motor mounting tube 10 is open, the mounting plate 20 is mounted on the first end of the motor mounting tube 10, and the motor 30 is mounted in the motor mounting tube 10;

[0047] The mounting plate 20 has a limiting structure 201 , which protrudes into the motor mounting cylinder 10 to limit the motor 30 from moving toward the mounting plate 20 .

[0048] It should be noted that the output shaft of the motor (such as the rotor shaft) can be perpendicular to the surface of the mounting plate, so that the limiting structure can limit the movement of the motor toward the mounting plate by limiting the axial movement of the rotor shaft. For motors of just the right size, the limiting structure can abut against the motor (specifically, the rotor shaft) to accurately and effectively limit the motor and improve the installation accuracy of the motor. For motors of shorter lengths, there may be no direct contact between the limiting structure and the motor, and the motor is only roughly limited with the help of the limiting structure to improve the installation efficiency of the motor. Optionally, the limiting structure is a circular or square boss structure.

[0049] In the disclosed embodiment, the motor of the water pump is installed in the motor mounting cylinder, and the first end of the motor mounting cylinder is an opening, so when there is a need to replace or repair the motor later, the motor can be quickly taken out with the help of the opening. The first end of the motor mounting cylinder is installed together with the mounting plate to ensure that when there is no need to repair or replace the motor, the motor is effectively encapsulated to prevent the motor from being damaged. In addition, the mounting plate also has a limiting structure protruding into the interior of the motor mounting cylinder, and the limiting structure can limit the movement of the motor toward the mounting plate, thereby limiting the motor and improving the installation accuracy of the motor.

[0050] In some embodiments, reference Figure 1-2 The outer edge of the first end of the motor mounting tube 10 has a first mounting structure 101, and the outer edge of the mounting plate 20 has a second mounting structure 202. The first mounting structure 101 cooperates with the second mounting structure 202 to realize the installation of the mounting plate 20 and the motor mounting tube 10.

[0051] Based on the above arrangement, it can be ensured that the mounting plate and the motor mounting cylinder are easy to install and remove. There are many ways to implement the first mounting structure and the second mounting structure, which can be selected according to actual needs, for example, two mutually matching buckles or matching grooves and protrusions, etc. The first mounting structure and the second mounting structure can be a matching set or multiple sets.

[0052] Optional, reference Figure 1-2 The first mounting structure 101 and the second mounting structure 202 include bolt holes, and the water pump further includes a first fixing member 40, which passes through the first mounting structure 101 and the second mounting structure 202 and is tightened. Optionally, the first fixing member may be a bolt or a screw.

[0053] By means of the cooperation between the first fixing member and the bolt holes in the first mounting structure and the second mounting structure, the stable connection between the mounting plate and the motor mounting cylinder can be ensured, the cost is low, and the later disassembly is convenient.

[0054] In some embodiments, reference Figure 2The side wall of the motor mounting cylinder 10 has a third mounting structure 102 , and the motor 30 is fixedly mounted in the motor mounting cylinder 10 through the third mounting structure 102 .

[0055] With the help of the third mounting structure, the stability of the motor in the motor mounting barrel can be ensured, and the stable and normal operation of the motor can be ensured. The implementation of the third mounting structure can also be adjusted according to needs. For example, the third mounting structure can be a groove, and the outer wall of the motor has a convex block, and the convex block is stuck in the groove; or the third mounting structure is an elastic protrusion protruding in the direction of the motor, and the elastic protrusion presses the motor to stabilize the motor in the motor mounting barrel, etc. The number of the third mounting structures can be multiple.

[0056] Optional, reference Figure 2 The third mounting structure 102 is a through hole, and the water pump includes a second fixing member 50, which passes through the third mounting structure 102 and is fixedly connected to the motor 30. Specifically, the outer wall of the motor may have a corresponding bolt hole so that the second fixing member can be tightened in the bolt hole to fix the motor. The second fixing member may be a screw or a bolt, and the third mounting structure may be a bolt hole or a light hole.

[0057] By fixing the motor (specifically, it can be fixedly connected to the stator) by means of the above method, it can be ensured that the motor does not swing in the motor mounting tube, thereby ensuring stable operation of the motor.

[0058] Optionally, the number of third mounting structures and second fixing members can be two or three or more respectively, and multiple third mounting structures and multiple second fixing members are evenly spaced and arranged, and each third mounting structure corresponds to a second fixing member position to further improve the stability of the motor.

[0059] In some embodiments, reference Figure 1-4 The water pump further includes an impeller 60 and an impeller connector 70, the motor 30 includes a rotor shaft 301, the second end of the motor mounting tube 10 has a second opening 103, the second end of the rotor shaft 301 extends out of the second opening 103, and the second end of the rotor shaft 301 has a rotor shaft bolt hole 3011;

[0060] The impeller connecting member 70 includes a limiting head 701 and a connecting portion 702 . The connecting portion 702 is screwed into the rotor shaft bolt hole 3011 . The limiting head 701 limits the impeller 60 to rotate coaxially with the rotor shaft 301 .

[0061] In this embodiment, the impeller is limited by the impeller connector to rotate coaxially with the rotor shaft, and the power of the motor is output to the impeller, and the circulation of the coolant is driven by the impeller. The second end of the rotor shaft extends out of the second opening of the motor mounting tube and has a rotor shaft bolt hole. The connecting part of the impeller connector is tightened in the rotor shaft bolt hole, thereby connecting the impeller to the rotor shaft. Since the connecting part of the rotor shaft and the impeller connector is connected by means of a bolt hole instead of being directly pressed together, if the impeller needs to be replaced later, the impeller connector can be screwed out of the rotor shaft bolt hole, which can effectively improve the efficiency of impeller replacement.

[0062] Optional, reference Figure 4 The impeller 60 has a first convex ring 601, which is sleeved outside the connecting portion 702 of the impeller connecting member 70, and the two side surfaces of the first convex ring 601 are respectively in contact with the limiting head 701 of the impeller connecting member 70 and the end surface of the second end of the rotor shaft 301. In this way, when the connecting portion of the impeller connecting member is tightened in the bolt hole of the rotor shaft, the first convex ring of the impeller is also firmly clamped between the limiting head of the impeller connecting member and the end surface of the second end of the rotor shaft, which can effectively ensure that the power of the rotor shaft is stably output to the impeller.

[0063] In some embodiments, reference Figure 2 , the motor 30 further includes a motor lead wire 302, and the water pump further includes a control element 80;

[0064] The control element 80 is mounted on a side of the mounting plate 20 away from the motor mounting cylinder 10;

[0065] The mounting plate 20 has a lead-out port 203 , and the motor lead-out wire 302 passes through the lead-out port 203 and is connected to the control element 80 .

[0066] In this embodiment, considering that the heat dissipation area of ​​the water pump is mainly in the area of ​​the MOSFET in the control element, the position of the three-phase line does not require much heat dissipation, and the control element is set outside the motor mounting tube. Since the control element is not located in the motor mounting tube, but is located on the side of the mounting plate away from the motor mounting tube, the heat emitted by the control element during use is not easy to accumulate. At the same time, if there is a need to replace the control element later, the control element can be directly removed from the mounting plate without disassembling the motor mounting tube and the mounting plate, or disassembling the motor, which effectively improves the maintenance efficiency of the control element. In addition, a lead-out port is directly set on the mounting plate to allow the motor lead wire to extend, which is conducive to achieving the decoupling of the motor and the control element, and further improves the subsequent maintenance efficiency of the control element.

[0067] Optionally, the lead-out port 203 may be in the shape of a long strip, a waist-shaped hole or an arc-shaped hole. In this way, on the one hand, it can be ensured that the motor lead-out wire is easier to extend, while at the same time, the rigidity of the entire mounting plate will not be excessively affected.

[0068] In some embodiments, reference Figure 1 and 4 The impeller connector 70 and the rotor shaft 301 have a connected coolant flow hole 703, and the coolant flow hole 703 is connected to the mounting plate 20. The coolant flow hole here is a through hole that penetrates the impeller connector and the rotor shaft.

[0069] In this embodiment, with the aid of the coolant flow holes, the coolant can flow through the impeller connector and the rotor shaft to the mounting plate to cool the control elements on the mounting plate, thereby ensuring that the control elements operate at the highest efficiency.

[0070] refer to Figure 5 , which shows the circulation path of the coolant in the water pump. It can be understood that under the action of the impeller 60, the coolant flows to the position of the mounting plate 20 through the impeller connector 70 and the rotor shaft 301, and then flows back through the reserved return path, and enters the next round of circulation through the coolant return hole 104 set on the motor mounting cylinder 10. In this process, the coolant can not only cool the stator, but also cool the control components on the mounting plate.

[0071] Optional, reference Figure 5 The limiting structure 201 on the mounting plate 20 has a receiving groove 2011 facing the rotor shaft 301, and the first end of the rotor shaft 301 is located in the receiving groove 2011. Optionally, the size of the receiving groove 2011 is larger than the size of the first end of the rotor shaft 201. In this way, the receiving groove itself can limit the position of the rotor shaft, further improving the installation accuracy of the motor. On the other hand, a certain amount of coolant can be contained in the receiving groove to effectively improve the cooling efficiency of the coolant on the control element.

[0072] Optional, reference Figure 5 The water pump further includes a shielding sleeve 100 and a shielding sleeve sealing ring 1001. The shielding sleeve sealing ring 1001 is sleeved outside the limiting structure 201 and is in close contact with the shielding sleeve 100. The shielding sleeve 100 is used to isolate the rotor and stator of the motor 30. In this way, the coolant flowing to the mounting plate cannot contact the coil winding of the motor under the blockage of the shielding sleeve and the shielding sleeve sealing ring, thereby not damaging the coil winding.

[0073] Optional, reference Figure 5 The impeller 60 also has a second convex ring 602 and a first sealing ring 603. The second convex ring 602 is mounted on the outside of the rotor shaft 301. The first sealing ring 603 is located between the second convex ring 602 and the first convex ring 601 to fill the gap formed between the first convex ring 601, the second convex ring 602 and the rotor shaft 301 to prevent the refluxed coolant from entering the above gap and corroding the above structure.

[0074] Optional, reference Figure 4The water pump further includes a first bearing 901, which is sleeved on the second end of the rotor shaft 301; a first limiting step 105 is formed on the inner side (i.e., the side close to the center) of the second end of the motor mounting tube 10, and the first limiting step 105 extends into a ring shape and surrounds the second opening 103, and the step surface of the first limiting step 105 abuts against the first bearing 901. In this way, with the cooperation of the first bearing and the first limiting step, when the motor is installed, the rotor shaft of the motor can only extend out of the preset length of the second opening, ensuring that the installation position of each structure is more accurate.

[0075] Optional, reference Figure 1 The water pump further includes a second bearing 902, which is sleeved outside the first end of the rotor shaft 301. The second bearing 902 and the first end of the rotor shaft 301 may be at least partially located in the receiving groove 2011 of the limiting structure 201. The second bearing and the first bearing are used to ensure that the swing of the rotor shaft during rotation is within a predetermined range, avoid affecting the surrounding structure, and ensure that the rotation center line of the rotor shaft is stable.

[0076] Optional, reference Figure 1 , the accommodating groove 2011 of the limiting structure 201 of the mounting plate 20 has a second limiting step 20111, and the second limiting step 20111 abuts or is close to the second bearing 902. For a motor of just the right size, the second limiting step can abut against the second bearing to further enhance the positioning accuracy and working stability of the motor. For a motor of a shorter length (e.g., a motor after repair or replacement), there may be a gap between the second bearing and the second limiting step. In this case, the second limiting step is only close to the second bearing to roughly limit the second bearing.

[0077] Optional, reference Figure 1 The mounting plate 20 also has a third limiting step 204, and the step surface of the third limiting step 204 abuts against the side wall of the first end of the motor mounting tube 10. In this way, the mounting accuracy and efficiency between the mounting plate and the motor mounting tube can be effectively improved.

[0078] Optionally, the motor mounting tube 10 is made of 6061 aviation aluminum to meet the structural strength required for frequent disassembly and assembly.

[0079] It should be noted that the various components in the water pump, such as the motor, impeller and control elements, have a huge impact on the overall performance of the water pump. Motors of different sizes, control elements with different algorithms and impellers with different structures will lead to huge differences in water pump performance. In related technologies, the replacement of motors and control elements often requires professional tools and techniques. The impeller and motor are often pressed together and cannot be easily separated, resulting in a cumbersome and time-consuming disassembly and assembly process of the water pump, which not only affects the maintenance efficiency of the equipment, but also increases the cost of using the equipment. In addition, re-pressing after press-assembly will result in poor consistency in test conditions for different test processes because the motor and impeller are re-coupled.

[0080] The disclosed embodiment provides a water pump, in which the one-piece housing used to install the motor in the related art is divided into a motor mounting barrel and a mounting plate, and the two are fixed by means of structures such as bolts, so that the motor can be easily assembled into the motor mounting barrel and can also be easily disassembled. The motor can be stably installed in the motor mounting barrel by means of mounting structures such as bolt holes on the side wall of the motor mounting barrel, and the limiting structure on the mounting plate can improve the installation accuracy and installation efficiency of the motor relative to the motor mounting barrel. If there is a need to replace the motor in the later stage, the second fixing member can be removed to replace another motor with the same diameter, the same or different length (and thus the same or different power), so that the motors of the same diameter can reuse the motor mounting barrel and mounting plate of the same structure, thereby saving the time of structural design and development and the time of making samples, and realizing the rapid development of motors of the same diameter but different lengths. It should be noted here that the length of the series of motors applicable to a set of motor mounting barrels and mounting plates has a maximum value, and the motor with the maximum length abuts against the limiting structure on the mounting plate when it is installed in the motor mounting barrel, while the motor with a smaller length has a gap between the limiting structure on the mounting plate when it is installed in the motor mounting barrel.

[0081] The water pump disclosed in the present invention also optimizes the connection between the motor and the impeller, and reserves bolt holes for the rotor shaft of the motor so that the impeller can be easily disassembled and installed. This allows the same motor to quickly replace different impellers, providing convenience for hydraulic optimization, and facilitating the verification of the performance of different impellers with the same motor, ensuring the effectiveness of the impeller performance test and the consistency of the test conditions, saving a lot of time and human resources in the development stage, and reducing development costs. At the same time, the impeller connector and the rotor shaft allow the coolant to flow to the mounting plate to dissipate heat from the control components and the stator, thereby improving the reliability and service life of the entire water pump.

[0082] In summary, the installation difficulty of the water pump provided by the embodiment of the present disclosure is low, it can be completed by manual installation, and the installation efficiency is high. In the water pump, the motor, control element and impeller are decoupled from each other, and any one of the three can be quickly replaced or repaired separately, which can effectively improve the maintenance efficiency of the water pump and reduce maintenance costs. It is also possible to test the three components separately to ensure the consistency of the test conditions, avoid the influence of other components on the experimental data, and quickly find out the samples with deviations during the test process. That is, the water pump provided by the present disclosure can be directly applied in mass production, and can also serve as a test water pump (the functions required and realized in the test state and the mass production state are completely consistent, and the mass production state only needs to change the connection structure, and the internal cooling channel and hydraulic results will not change); the water pump has a wide range of application and can be adapted to a series of motors of the same diameter and different lengths without changing the structure of the shell.

[0083] In a second aspect, an embodiment of the present disclosure provides an engine cooling system, comprising a water pump as described above.

[0084] An embodiment of the present disclosure provides an engine cooling system, in which the motor, control element and impeller in the water pump of the system are decoupled from each other, and any one of the three can be quickly replaced or repaired separately, which can effectively improve the maintenance efficiency of the water pump and reduce maintenance costs.

[0085] In a third aspect, an embodiment of the present disclosure provides a vehicle, comprising a water pump as described above, or comprising an engine cooling system as described above.

[0086] An embodiment of the present disclosure provides a vehicle in which the motor, control element and impeller in the water pump of the vehicle are decoupled from each other, and any one of the three can be quickly replaced or repaired separately, which can effectively improve the maintenance efficiency of the water pump and reduce maintenance costs.

[0087] In the present disclosure, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The term "plurality" refers to two or more, unless explicitly defined otherwise.

[0088] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the present disclosure disclosed herein. The present disclosure is intended to cover any variations, uses or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The description and examples are intended to be exemplary only.

[0089] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A water pump, characterized in that: It comprises a motor mounting cylinder (10), a mounting plate (20) and a motor (30); The first end of the motor mounting tube (10) is open, the mounting plate (20) is mounted on the first end of the motor mounting tube (10), and the motor (30) is mounted in the motor mounting tube (10); The mounting plate (20) has a limiting structure (201), and the limiting structure (201) protrudes into the motor mounting cylinder (10) to limit the movement of the motor (30) toward the mounting plate (20).

2. The water pump according to claim 1, characterized in that: The outer edge of the first end of the motor mounting tube (10) has a first mounting structure (101), and the outer edge of the mounting plate (20) has a second mounting structure (202), and the first mounting structure (101) and the second mounting structure (202) cooperate to achieve the installation of the mounting plate (20) and the motor mounting tube (10).

3. The water pump according to claim 2, characterized in that: The first mounting structure (101) and the second mounting structure (202) comprise bolt holes, and the water pump further comprises a first fixing member (40), wherein the first fixing member (40) passes through the first mounting structure (101) and the second mounting structure (202) and is tightened.

4. The water pump according to claim 1, characterized in that: The side wall of the motor mounting cylinder (10) has a third mounting structure (102), and the motor (30) is fixedly mounted in the motor mounting cylinder (10) via the third mounting structure (102).

5. The water pump according to claim 4, characterized in that: The third mounting structure (102) is a through hole, and the water pump comprises a second fixing member (50), and the second fixing member (50) passes through the third mounting structure (102) and is fixedly connected to the motor (30).

6. The water pump according to claim 1, characterized in that: The water pump further comprises an impeller (60) and an impeller connecting member (70); the motor (30) comprises a rotor shaft (301); the second end of the motor mounting cylinder (10) comprises a second opening (103); the second end of the rotor shaft (301) extends out of the second opening (103); and the second end of the rotor shaft (301) comprises a rotor shaft bolt hole (3011); The impeller connecting member (70) comprises a limiting head (701) and a connecting portion (702), wherein the connecting portion (702) is screwed into the rotor shaft bolt hole (3011), and the limiting head (701) limits the impeller (60) to rotate coaxially with the rotor shaft (301).

7. The water pump according to claim 6, characterized in that The motor (30) further includes a motor lead wire (302), and the water pump further includes a control element (80); The control element (80) is mounted on a side of the mounting plate (20) away from the motor mounting cylinder (10); The mounting plate (20) has a lead-out port (203), and the motor lead-out wire (302) passes through the lead-out port (203) to be connected to the control element (80).

8. The water pump according to claim 7, characterized in that: The impeller connecting member (70) and the rotor shaft (301) have a connected coolant circulation hole (703), and the coolant circulation hole (703) is connected to the mounting plate (20).

9. An engine cooling system, characterized in that: Comprising a water pump as described in any one of claims 1-8.

10. A vehicle, characterized in that: It comprises a water pump as claimed in any one of claims 1 to 8, or comprises an engine cooling system as claimed in claim 9.

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