Engine water storage tank and vehicle

Abstract

The utility model provides an engine water storage tank and a vehicle. The engine water storage tank comprises a water tank body, a supporting column, a first limiting piece, a reed pipe sensor and a floater. The supporting column is fixed in the water tank main body; the reed pipe sensor is connected with the water tank main body and extends into a cavity of the supporting column; the first limiting piece is fixed to the top of the water tank body and fixedly connected with the outer side of the supporting column, the lower end of the first limiting piece is close to the reed pipe sensor and lower than the lowest liquid level line of the water tank body or higher than the highest liquid level line of the water tank body, and the floater is slidably connected to the outer side of the supporting column. When the floater ascends, the reed in the reed pipe sensor is closed, and the circuit is connected, and when the floater descends, the reed in the reed pipe sensor is separated, the circuit is disconnected, and an alarm response is triggered. Alarm response of the liquid level in the engine water tank in the liquid shortage state is achieved, the first limiting piece is arranged, the highest rising position of the floater is limited, and false alarm when the liquid level fluctuates abnormally is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle manufacturing, in particular to an engine water storage tank and a vehicle. Background Art

[0002] The engine water tank of a vehicle is also called the engine water tank and is installed in the engine compartment. The engine water tank is used to store coolant, which circulates into the engine through a loop to dissipate heat and cool down the engine, while releasing the gas accumulated in the cooling system and the steam generated by the high temperature of the engine.

[0003] In the related art, the engine water tank can only realize over-temperature alarm, but cannot realize liquid shortage alarm. Especially when the coolant is too little, it is easy to cause local high temperature on the exhaust side of the engine, affecting the service life of the engine. Utility Model Content

[0004] In view of the above problems, an embodiment of the utility model provides an engine water tank and a vehicle to solve the problem that the engine water tank in the related art cannot realize the lack of liquid alarm.

[0005] The utility model embodiment provides an engine water storage tank, including a water tank body, a support column, a first limiter, a reed switch sensor and a float;

[0006] The support column is fixed in the water tank body, and a cavity is provided in the support column. The reed switch sensor is connected to the water tank body and extends into the cavity. Two reeds and a circuit connected to the reeds are arranged in the reed switch sensor.

[0007] The first stopper is fixed to the top of the water tank body and fixedly connected to the outside of the support column. Along the gravity direction, one end of the first stopper away from the top of the water tank body is close to the reed switch sensor and is lower than the lowest liquid level line of the water tank body or higher than the highest liquid level line of the water tank body. The float is slidably connected to the outside of the support column. The sliding direction of the float is along the axial direction of the support column. A magnetic part is arranged inside the float.

[0008] When the float slides toward the first limit member, the reed in the reed switch sensor is attracted to make the circuit conductive; when the float slides away from the first limit member, the reed in the reed switch sensor is separated to disconnect the circuit and trigger an alarm response.

[0009] Optionally, the support column extends from the top to the bottom of the water tank body.

[0010] Optionally, a limiting protrusion is provided at the bottom of the water tank body along the gravity direction;

[0011] At least two first position-limiting members are arranged along the circumference of the outer side of the support column, and the at least two first position-limiting members are evenly distributed along the circumference of the outer side of the support column.

[0012] Optionally, the top of the cavity has an opening communicating with the outside of the water tank body;

[0013] A clamping portion is provided at one end of the reed switch sensor, and the clamping portion is sealed and connected to the opening.

[0014] Optionally, a first interface and a second interface are provided on the water tank body, the first interface is used to connect to the exhaust pipe of the range extender, and the second interface is used to connect to the exhaust pipe of the radiator.

[0015] Optionally, the engine water tank further includes a shock absorbing pad;

[0016] The shock-absorbing pad includes a first clamping ring, a connecting ring and a second clamping ring. Along the direction of gravity, the first clamping ring is arranged at the bottom of the water tank body, and the connecting ring is connected between the first clamping ring and the second clamping ring. The outer diameters of the first clamping ring and the second clamping ring are larger than the outer diameter of the connecting ring, and a space for fixing the bracket is formed between the first clamping ring and the second clamping ring.

[0017] Optionally, the engine water tank further comprises a mounting column;

[0018] Along the direction of gravity, the mounting column is fixed to the bottom of the water tank body, and the mounting column passes through the first clamping ring, the connecting ring and the second clamping ring in sequence along the axis. The portion of the mounting column extending out of the second clamping ring is provided with a second limit piece.

[0019] Optionally, along the axis of the connecting column and in a direction away from the first clamping ring, the second clamping ring has a portion with a gradually decreasing outer diameter.

[0020] Optionally, two second position-limiting members are disposed on the mounting post, and the two second position-limiting members are disposed opposite to each other along the outer circumference of the mounting post.

[0021] An embodiment of the utility model further provides a vehicle, comprising the engine water tank described in any one of the above items.

[0022] The engine water tank provided by the embodiment of the utility model has the following advantages:

[0023] First, the reed switch sensor is used in the engine water tank, which has a lack of liquid alarm function. The first limiter is set on the outside of the support column and fixed to the top of the water tank body, and is close to the reed switch sensor in the horizontal direction. The float is slidably connected to the outside of the support column and is located below the first limiter. A magnetic part is arranged in the float, which can generate a magnetic field with the reed in the reed switch sensor. When the liquid level in the water tank rises and causes the float to slide upward, the float gradually approaches the first limiter, and the reed in the reed switch produces different polarities under the action of the magnetic field and attracts each other, so that the circuit is turned on; when the liquid level in the water tank drops and causes the float to slide downward, the float gradually moves away from the first limiter, the distance between the magnetic part and the reed switch increases, the magnetic field weakens, and the reeds separate from each other due to their own elasticity. The circuit is disconnected and an alarm response is triggered, prompting the operator to replenish the fluid in time. The lower end of the first limiter is lower than the lowest liquid level line of the water tank body or higher than the highest liquid level line of the water tank body. At the same time, the lower end of the first limiter is within the range of the magnetic ring center line of the reed switch sensor, which limits the highest point of the float movement and avoids false alarms caused by abnormal liquid level fluctuations. Therefore, an alarm response can be made when there is a lack of liquid in the engine water tank.

[0024] Second, there are two joints on the water tank body, one for connecting the range extender exhaust pipe and the other for connecting the radiator exhaust pipe. This makes the range extender exhaust and the radiator exhaust independent of each other. This avoids the problem of affecting the radiator exhaust when the exhaust side pressure of the engine range extender is high.

[0025] Third, the shock-absorbing pad structure is improved to a clamping hook formed by the first clamping ring, the connecting ring and the second clamping ring, which can effectively clamp the bracket and limit the bracket in the vertical direction to prevent the bracket from shaking and falling off. At the same time, a second limiter is provided at the lower part of the mounting column to cooperate with the shock-absorbing pad to limit and fix the shock-absorbing pad and the bracket to prevent them from falling off. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0027] Figure 1 It is a schematic diagram of the structure of the engine water storage tank provided by the embodiment of the utility model;

[0028] Figure 2 It is a schematic diagram of the principle when the float rises in the embodiment of the utility model;

[0029] Figure 3 It is a schematic diagram of the principle when the float descends in the embodiment of the utility model;

[0030] Figure 4 This is a schematic diagram of the interface position in the embodiment of the utility model;

[0031] Figure 5 It is a schematic diagram of the connection between the engine water storage tank and the cabin support rod in the embodiment of the utility model;

[0032] Figure 6 It is a schematic diagram of the connection structure between the engine water storage tank and the bracket in the embodiment of the utility model;

[0033] Figure 7 This is a schematic diagram of the connection structure between the shock-absorbing pad and the mounting column in the embodiment of the utility model;

[0034] Figure 8 It is a schematic cross-sectional view of the shock-absorbing pad structure in an embodiment of the utility model;

[0035] Fig. 9 This is a schematic diagram of the structural position of the first position-limiting member in the embodiment of the utility model;

[0036] Fig.10 It is a schematic diagram of the reed switch sensor structure.

[0037] Description of reference numerals:

[0038] 1-water tank body, 11-liquid storage chamber, 12-limiting protrusion, 13-opening, 14-first interface, 15-second interface, 16-partition, 17-third interface, 18-pressure cover, 19-mounting bracket, 2-support column, 21-cavity, 3-first limiting member, 4-reed switch sensor, 41-reed, 42-circuit, 43-clamping part, 44-tube body, 5-float, 51-magnetic member, 61-range extender exhaust pipe, 62-radiator exhaust pipe, 7-shock pad, 71-first clamping ring, 72-connecting ring, 73-second clamping ring, 8-mounting column, 81-second limiting member, 91-bracket, 92-cabin support rod. DETAILED DESCRIPTION

[0039] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the engine water tank and the vehicle provided by the present invention are further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0040] Reference Figures 1 to 3The utility model embodiment provides an engine water tank, including a water tank body 1, a support column 2, a first stopper 3, a reed switch sensor 4 and a float 5; the support column 2 is fixed in the water tank body 1, the support column 2 has a cavity 21, the reed switch sensor 4 is connected to the water tank body 1 and extends into the cavity 21, and the reed switch sensor 4 is provided with two reed leaves 41 and a circuit 42 connected to the reed leaves 41; the first stopper 3 is fixed to the top of the water tank body 1 and is fixedly connected to the outer side of the support column 2, and along the gravity direction, the first stopper 3 is away from the end of the top of the water tank body 1 The float 5 is slidably connected to the outside of the support column 2, close to the reed switch sensor 4, and lower than the lowest liquid level line a of the water tank body 1 or higher than the highest liquid level line b of the water tank body 1. The sliding direction of the float 5 is along the axial direction of the support column 2, and a magnetic member 51 is arranged in the float 5. When the float 5 slides toward the direction close to the first limit member 3, the reed 41 in the reed switch sensor 4 is attracted to make the circuit 42 conductive, and when the float 5 slides toward the direction away from the first limit member 3, the reed 41 in the reed switch sensor 4 is separated to disconnect the circuit 42 and trigger an alarm response.

[0041] Specifically, if Figures 1 to 3 As shown, the water tank body 1 has a plurality of liquid storage chambers 11 therein, and the plurality of liquid storage chambers 11 are separated by partitions 16. A connecting port is provided on the partition 16 to connect different liquid storage chambers 11 to avoid excessively drastic changes in the liquid level. A support column 2, a first limit member 3, a reed switch sensor 4 and a float 5 are provided in at least one of the liquid storage chambers 11. The support column 2 is fixed in the water tank body 1, and extends from the top to the bottom of the water tank body 1. The support column 2 can be provided independently of the water tank body 1, and can be provided as an integral part with the water tank body. In this embodiment, the support column 2 and the water tank body 1 are an integral part. The support column 2 has a cavity 21 therein, and the reed switch sensor 4 is connected to the top of the water tank body 1 and extends into the cavity 21. As shown Fig.10As shown, the reed switch sensor 4 includes a tube body 44, two reeds 41 and a circuit 42, and the two reeds 41 are arranged alternately. When the magnetic part 51 of the float 5 is between the starting position c of the center of the magnetic ring and the end position d of the center of the magnetic ring, under the action of the external magnetic field, magnetic forces of different polarities are generated between the two reeds 41. When the magnetic force exceeds the elastic force of the reed 41 itself, the two reeds 41 attract each other and the circuit 42 is turned on; when the magnetic part 51 of the float 5 moves to outside the interval between position c and position d, the external magnetic field gradually weakens until it disappears, and the elastic force causes the two reeds 41 to separate from each other, the circuit 42 is disconnected, and an alarm response is performed. The upper end of the first limiter 3 is fixed to the top of the water tank body 1, the side is fixed to the outside of the support column 2, and the lower end is close to the reed switch sensor 4. The lower end of the first limiter 3 is lower than the lowest liquid level line a of the water tank body 1 or higher than the highest liquid level line b of the water tank body 1 . Meanwhile, the lower end of the first limiter 3 is within the range of the magnetic ring center line of the reed switch sensor 4 .

[0042] In one embodiment, along the direction of gravity, the bottom of the first limit member 3 is slightly lower than the lowest liquid level line a of the water tank. The lowest liquid level line is also called the MIN line. The lifting operator should replenish the coolant in time. The lower end of the first limit member 3 is lower than the lowest liquid level line a of the water tank body 1, which is used to limit the highest point of the float 5 sliding upward. On the one hand, if there is no limiting effect of the first limit member 3, when the float 5 slides upward above the lowest liquid level line and above the end point d of the center of the magnetic ring of the reed switch sensor 4, the reeds 41 will separate from each other and the circuit 42 will be disconnected to generate a false alarm. On the other hand, the lower end of the first limit member 3 is slightly lower than the lowest liquid level line a of the water tank body 1, which can improve the accuracy of the liquid shortage alarm and avoid errors in the results caused by abnormal liquid level fluctuations. Figure 2 As shown, the distance L1 between the bottom of the first limiter 3 and the position line a is set to 0.6 mm. That is, the distance L1 between the highest point of the float 5 and the position line a is 0.6 mm. Figure 3 As shown, the distance L2 between the float 5 dropping to the alarm point and the position line a is 6 mm.

[0043] In another embodiment, along the gravity direction, the bottom of the first stopper 3 is slightly higher than the highest liquid level line b of the water tank, which is also called the MAX line, i.e., the maximum water level that can be contained in the water tank. However, the bottom of the first stopper 3 should be lower than the end point d of the magnetic ring center of the reed switch sensor 4. This prevents the reed 41 of the reed switch sensor 4 from giving a false alarm due to the disappearance of the magnetic field when the float moves to the highest point.

[0044] Along the axis of the support column 2, the float 5 is slidably connected to the outside of the support column 2. A magnetic member 51, i.e., a magnet, is embedded in the float 5. The float 5 is arranged in a ring shape and is sleeved and connected to the outside of the support column 2 to ensure good contact.

[0045] In the first embodiment, if Figure 2 As shown, when the liquid level in the water tank body 1 rises, the float 5 slides upward and gradually approaches the first stopper 3. The two reeds 41 in the reed switch sensor 4 attract each other under the action of the magnetic field, so that the circuit 42 is turned on. Figure 3 As shown, when the liquid level in the water tank body 1 drops, the float 5 slides downward and gradually moves away from the first limit member 3 until it is lower than the starting position c of the center of the magnetic ring of the reed switch sensor 4. The magnetic field weakens until it disappears, and the two reed leaves 41 separate from each other due to their own elasticity. The circuit 42 is disconnected and triggers an alarm response, prompting the operator to replenish the fluid in time.

[0046] The engine water tank provided by the embodiment of the utility model realizes an alarm response when the liquid level in the engine water tank is insufficient. In addition, the first limiter is set slightly lower than the lowest liquid level line of the water tank body or slightly higher than the highest liquid level line of the water tank body to limit the highest position of the float rising, thereby avoiding false alarms when the liquid level fluctuates abnormally.

[0047] Optionally, refer to Figure 2 and Figure 3 The support column 2 extends from the top to the bottom of the water tank body 1.

[0048] Specifically, if Figure 2 and Figure 3 As shown, the upper end of the support column 2 is fixed to the top of the water tank body 1, and the lower end is fixed to the bottom of the water tank body 1. The float 5 is slidably connected to the outside of the support column 2, and can move between the top and the bottom of the water tank body 1 under the restriction of the support column 2.

[0049] Optionally, refer to Figure 2 , Figure 3 and Fig. 9 , along the direction of gravity, a limiting protrusion 12 is provided at the bottom of the water tank body 1;

[0050] At least two first position-limiting members 3 are arranged along the circumference of the outer side of the support column 2 , and the at least two first position-limiting members 3 are evenly distributed.

[0051] Specifically, if Figure 2 , Figure 3 and Fig. 9 As shown, there are at least two first limiters 3. In this embodiment, four first limiters 3 are arranged, which are evenly distributed along the circumference of the outer side of the support column 2, and the highest displacement point of the float 5 is limited at different positions along the circumference. Compared with the integral annular limiter, the material cost is saved.

[0052] Specifically, if Figure 2 and Figure 3As shown, a limiting protrusion 12 is provided at the bottom of the water tank body 1 to limit the lowest displacement point of the float 5 to prevent the float 5 from hitting the bottom of the water tank body 1 when the liquid level in the water tank fluctuates abnormally.

[0053] Optionally, refer to Figure 2 and Figure 3 The top of the cavity 21 has an opening 13 connected to the outside of the water tank body 1 ; one end of the reed switch sensor 4 is provided with a clamping portion 43 , and the clamping portion 43 is sealed and connected to the opening 13 .

[0054] Specifically, if Figure 2 and Figure 3 As shown, the top of the cavity 21 has an opening 13, and the opening 13 is connected to the outside of the water tank body 1. The upper end of the reed switch sensor 4 is provided with a clamping portion 43, which is sealed and connected to the opening 13 by tightening, so as to prevent external liquid from entering the cavity 21 through the opening 13, that is, to ensure that the performance of the reed switch sensor 4 will not be affected by moisture.

[0055] Optionally, refer to Figure 1 and Figure 4 The water tank body 1 is provided with a first interface 14 and a second interface 15 , wherein the first interface 14 is used to connect to the range extender exhaust pipe 61 , and the second interface 15 is used to connect to the radiator exhaust pipe 62 .

[0056] Specifically, in the related art, the range extender exhaust pipe and the radiator exhaust pipe are connected to the water tank through a three-way interface. Figure 4 As shown, in this embodiment, an interface is provided for each of the range extender exhaust pipe 61 and the radiator exhaust pipe 62. The first interface 14 is used to connect the range extender exhaust pipe 61, and the second interface 15 is used to connect the radiator exhaust pipe 62. This avoids affecting the radiator exhaust when the exhaust side pressure of the engine range extender is high, that is, improves the heat dissipation efficiency.

[0057] Optionally, refer to Figures 5 to 7 The engine water tank also includes a shock-absorbing pad 7; the shock-absorbing pad 7 includes a first clamping ring 71, a connecting ring 72 and a second clamping ring 73. Along the direction of gravity, the first clamping ring 71 is arranged at the bottom of the water tank body 1, and the connecting ring 72 is connected between the first clamping ring 71 and the second clamping ring 73. The outer diameters of the first clamping ring 71 and the second clamping ring 73 are larger than the outer diameter of the connecting ring 72, and a space for fixing the bracket 91 is formed between the first clamping ring 71 and the second clamping ring 73.

[0058] Specifically, if Figures 5 to 7As shown, a mounting bracket 19 is provided on the outside of the water tank body 1 and connected to the cabin support rod 92. The shock-absorbing pad 7 is provided at the bottom of the water tank body 1. The outer diameters of the first clamping ring 71 and the second clamping ring 73 are larger than the outer diameter of the middle connecting ring 72, so a hook structure for supporting and fixing the bracket 91 is formed between the first clamping ring 71 and the second clamping ring 73. On the basis of the shock-absorbing and buffering effect of the bottom of the water tank, the bracket 91 is limited in the vertical direction to prevent the bracket from shaking and falling off.

[0059] Optionally, refer to Figures 5 to 7 The engine water tank also includes a mounting column 8; along the direction of gravity, the mounting column 8 is fixed to the bottom of the water tank body 1, and the mounting column 8 passes through the first clamping ring 71, the connecting ring 72 and the second clamping ring 73 in sequence along the axis, and the portion of the mounting column 8 extending out of the second clamping ring 73 is provided with a second limit member 81.

[0060] Specifically, if Figures 5 to 7 As shown, the mounting column 8 is fixed to the bottom of the water tank body 1, and the mounting column 8 is passed through the shock-absorbing pad 7 and fixedly connected to the shock-absorbing pad 7. Specifically, along the gravity direction, the mounting column 8 passes through the first clamping ring 71, the connecting ring 72 and the second clamping ring 73 from top to bottom in sequence, and the portion of the lower end extending out of the second clamping ring 73 is provided with a second limiter 81, which limits the position of the shock-absorbing pad 7 and the bracket 91 in the vertical direction, i.e., in the Z direction, to prevent the shock-absorbing pad 7 and the bracket 91 from slipping off and falling off.

[0061] Optionally, refer to Figure 7 and Figure 8 Along the axis of the connecting ring 72 and away from the first clamping ring 71 , the second clamping ring 73 has a portion with a gradually decreasing outer diameter.

[0062] Specifically, if Figures 7 and 8 As shown, the diameter of a part of the second clamping ring 73 gradually decreases downward in the direction of gravity, i.e., in the negative Z direction. In the direction of gravity, the side wall of the upper part of the second clamping ring 73 is a vertical side wall, i.e., the outer diameter of the upper part of the second clamping ring 73 remains unchanged, and the side wall of the lower part is an inclined side wall, i.e., the outer diameter of the lower part of the second clamping ring 73 gradually decreases. The angle between the inclined side wall and the horizontal line is α, and the angle α is set to 45° in this embodiment to facilitate the assembly connection between the shock absorbing pad 7 and the mounting column 8.

[0063] Optionally, refer to Figure 7 The mounting column 8 is provided with two second position-limiting members 81 , and the two second position-limiting members 81 are arranged opposite to each other along the outer circumference of the mounting column 8 .

[0064] Specifically, if Figure 7As shown, two second stoppers 81 are disposed at the lower end of the mounting column 8, and the two second stoppers 81 are disposed opposite to each other along the outer periphery of the mounting column 8, that is, the angle between the two second stoppers 81 is 180°, which enhances the limiting and fixing effect of the second stoppers 81 on the shock-absorbing pad 7 and the bracket 91 in the Z direction. In addition, along the Z direction, a 0.5 mm assembly gap is left between the mounting column 8 and the shock-absorbing pad 7, which can effectively adjust the matching size, alleviate the stress concentration problem, and avoid deformation of parts caused by thermal expansion.

[0065] In addition, a third interface 17 is provided at the bottom of the water tank body 1, which is a water supply pipe interface for the operator to connect the coolant pipeline to replenish the coolant. A pressure cap 18 is provided on the upper part of the water tank body 1, which can keep the cooling efficiency of the cooling system under a certain pressure.

[0066] Reference Figure 1 and Figure 2 The embodiment of the utility model further provides a vehicle, comprising the engine water tank described in any one of the above embodiments, which realizes the function of alarming when the engine water tank is short of liquid, thereby improving the service life of the engine.

[0067] The above description is only a specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention.

[0068] It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention, and these improvements and modifications should also be regarded as within the scope of protection of the present invention.

[0069] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or terminal device including the elements.

[0070] The engine water tank and vehicle provided by the utility model are introduced in detail above. Specific examples are used in this article to illustrate the principle and implementation mode of the utility model. The description of the above embodiments is only used to help understand the method and core idea of ​​the utility model; at the same time, for general technical personnel in this field, according to the idea of ​​the utility model, there will be changes in the specific implementation mode and application scope. In summary, the content of this specification should not be understood as a limitation on the utility model.

Claims

1. An engine water tank, characterized in that: It includes a water tank body, a support column, a first limiter, a reed switch sensor and a float; The support column is fixed in the water tank body, and a cavity is provided in the support column. The reed switch sensor is connected to the water tank body and extends into the cavity. Two reeds and a circuit connected to the reeds are arranged in the reed switch sensor. The first stopper is fixed to the top of the water tank body and fixedly connected to the outside of the support column. Along the gravity direction, one end of the first stopper away from the top of the water tank body is close to the reed switch sensor and is lower than the lowest liquid level line of the water tank body or higher than the highest liquid level line of the water tank body. The float is slidably connected to the outside of the support column. The sliding direction of the float is along the axial direction of the support column. A magnetic part is arranged inside the float. When the float slides toward the first limit member, the reed in the reed switch sensor is attracted to make the circuit conductive; when the float slides away from the first limit member, the reed in the reed switch sensor is separated to disconnect the circuit and trigger an alarm response.

2. The engine water tank according to claim 1, characterized in that: The support column extends from the top to the bottom of the water tank body.

3. The engine water tank according to claim 2, characterized in that: Along the gravity direction, a limiting protrusion is provided at the bottom of the water tank body; At least two first position-limiting members are arranged along the circumference of the outer side of the support column, and the at least two first position-limiting members are evenly distributed along the circumference of the outer side of the support column.

4. The engine water tank according to claim 2, characterized in that: The top of the cavity has an opening communicating with the outside of the water tank body; A clamping portion is provided at one end of the reed switch sensor, and the clamping portion is sealed and connected to the opening.

5. The engine water tank according to claim 1, characterized in that: The water tank body is provided with a first interface and a second interface, the first interface is used to connect to the range extender exhaust pipe, and the second interface is used to connect to the radiator exhaust pipe.

6. The engine water tank according to claim 1, characterized in that: The engine water tank also includes a shock absorbing pad; The shock-absorbing pad includes a first clamping ring, a connecting ring and a second clamping ring. Along the direction of gravity, the first clamping ring is arranged at the bottom of the water tank body, and the connecting ring is connected between the first clamping ring and the second clamping ring. The outer diameters of the first clamping ring and the second clamping ring are larger than the outer diameter of the connecting ring, and a space for fixing the bracket is formed between the first clamping ring and the second clamping ring.

7. The engine water tank according to claim 6, characterized in that: The engine water tank also includes a mounting post; Along the direction of gravity, the mounting column is fixed to the bottom of the water tank body, and the mounting column passes through the first clamping ring, the connecting ring and the second clamping ring in sequence along the axis. The portion of the mounting column extending out of the second clamping ring is provided with a second limit piece.

8. The engine water tank according to claim 6, characterized in that: The second clamping ring has a portion with a gradually decreasing outer diameter along the axis of the connecting ring and in a direction away from the first clamping ring.

9. The engine water tank according to claim 7, characterized in that: Two second position-limiting members are arranged on the installation column, and the two second position-limiting members are arranged opposite to each other along the outer circumference of the installation column.

10. A vehicle, characterized in that: An engine water tank comprising the engine water tank as claimed in any one of claims 1 to 9.

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