Water pump

Abstract

The utility model provides a water pump which comprises a rotor and a rotating shaft, the rotor is arranged on the rotating shaft in a sleeved mode and does circumferential motion relative to the rotating shaft with the rotating shaft as the center, the water pump further comprises a shaft support arranged at the first end of the rotating shaft, a moving block, an ejector block and a guiding component, and the rotating shaft rotates around the axial direction of the rotating shaft and moves within the limited distance in the axial direction of the rotating shaft. The shaft support and the guide part are fixedly arranged, and a space for the moving block and the top block to move in the axial direction of the rotating shaft is formed in the shaft support; the moving block is fixed relative to the circumferential direction of the rotating shaft and movably arranged relative to the axial direction of the rotating shaft, the ejecting block is fixed relative to the circumferential direction of the guiding component and movably arranged relative to the axial direction of the guiding component, the moving block is in spiral fit with the shaft support, and the ejecting block is in spiral fit with the moving block. The rotating direction between the moving block and the shaft support is the same as the rotating direction between the top block and the moving block, the moving block drives the top block to move towards the rotating shaft and impact the rotating shaft, the bonding force between the rotating shaft and the rotor is damaged, and the rotating shaft and the rotor are automatically separated.

Description

Technical Field

[0001] The utility model relates to the technical field of water pumps, in particular to a water pump. Background Art

[0002] With the continuous improvement of living standards, users have higher and higher requirements for bathing comfort and other water experience that gas water heaters can bring. The water pump in the gas water heater is an important component to ensure user experience. At present, the gas water heaters on the market mostly use DC brushless water pumps. Compared with traditional AC water pumps, DC brushless water pumps are smaller in size, longer in life, lower in noise, and can adjust the speed and signal feedback.

[0003] The internal structure of a brushless DC water pump can refer to Chinese patent CN218151448U. A water pump generally includes a rotor, a rotating shaft, and a shaft support. The rotor is sleeved on the rotating shaft and can rotate around the rotating shaft, and the shaft support is located at one end of the rotating shaft. However, since the gap between the rotor and the rotating shaft is very small, fine sand or other impurities will adhere to the gap between the rotor and the rotating shaft after entering the pump body. If the water pump does not run for a long time, these impurities may become sticky after being soaked in water for a long time, and stick to the rotating shaft and the rotor. If the starting torque of the water pump cannot break free from the bonding force, the water pump will fail to start and become stuck.

[0004] CN218151448U sets the shaft support and the rotating shaft as threaded connections, and opens an opening at the bottom of the water pump. When the water pump is stuck, the staff can apply force to the shaft support through the opening to rotate the shaft support, thereby driving the rotating shaft to produce axial displacement to separate the rotating shaft from the rotor. However, it is not possible to automatically solve the problem of sticking. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a water pump in order to overcome the defect that the water pump in the prior art cannot automatically solve the problem of being stuck.

[0006] The utility model solves the above technical problems through the following technical solutions:

[0007] A water pump comprises a rotor and a rotating shaft, wherein the rotor is sleeved on the rotating shaft and moves circumferentially relative to the rotating shaft with the rotating shaft as the center, and the water pump further comprises a shaft support, a moving block, a top block and a guide component arranged at a first end of the rotating shaft, wherein:

[0008] The rotating shaft is configured to rotate about its axial direction and move within a limited distance along its axial direction;

[0009] The shaft support and the guide component are both fixedly arranged relative to the water pump, and a space is provided in the shaft support for the moving block and the top block to move along the axial direction of the rotating shaft;

[0010] The moving block is fixed relative to the circumference of the rotating shaft and is movably arranged relative to the axial direction of the rotating shaft, the top block is fixed relative to the circumference of the guiding component and is movably arranged relative to the axial direction of the guiding component, the moving block is spirally matched with the shaft support, the top block is spirally matched with the moving block, the rotation direction between the moving block and the shaft support is the same as the rotation direction between the top block and the moving block, and the moving block drives the top block to move toward the rotating shaft and hit the rotating shaft.

[0011] In this scheme, when the rotating shaft and the rotor are bonded due to impurities, the rotating shaft rotates around its axial direction driven by the rotor, and the moving block fixed to the circumference of the rotating shaft rotates with the rotating shaft and moves along the axial direction of the rotating shaft. In the process of the moving block moving along the axial direction of the rotating shaft, the top block spirally matched with the moving block moves in the opposite direction driven by the moving block. The top block hits the rotating shaft during the movement process to cause the rotating shaft to be displaced in the axial direction, thereby destroying the bonding force between the rotating shaft and the rotor, and separating the rotating shaft from the rotor, thus avoiding the situation where the rotor and the rotating shaft are bonded and cause the water pump to be stuck. In addition, the bonding force between the rotor and the rotating shaft can be converted into an axial force along the rotating shaft after passing through the moving block and the top block in sequence, and then transmitted to the rotating shaft again. In other words, the separation of the rotor and the rotating shaft is automatically achieved by utilizing the bonding force between the rotating shaft and the rotor, without the need for maintenance personnel to operate from the outside.

[0012] Preferably, the pitch of the helical structure between the moving block and the shaft support is smaller than the pitch of the helical structure between the moving block and the top block.

[0013] In this solution, by adopting the above-mentioned structural form, the moving speed of the top block can be greater than the moving speed of the moving block, thereby increasing the impact force of the top block on the rotating shaft.

[0014] Preferably, the water pump also includes a retaining ring, the rotating shaft has a mounting portion that does not overlap with the radial projection of the rotor, the retaining ring is arranged on the mounting portion and fixed relative to the rotating shaft, and the axial distance between the retaining ring and the rotor is smaller than the axial movement range of the rotating shaft.

[0015] In this solution, the snap ring can move axially with the rotating shaft, and the rotating shaft can be separated from the rotor when the rotating shaft moves axially. After the snap ring moves axially with the rotating shaft, the snap ring is clamped between the rotating shaft and the rotor, so that the rotating shaft and the rotor still cannot rotate relative to each other, thereby facilitating subsequent reset. Before the rotating shaft moves axially, the snap ring is located at the mounting portion of the rotating shaft. Since the radial projection of the mounting portion does not overlap with the rotor, the snap ring will not affect the normal operation of the water pump.

[0016] Preferably, the water pump further comprises a gasket, wherein the gasket is sleeved on the rotating shaft, the radial projections of the gasket and the rotor do not overlap, and the retaining ring is arranged between the gasket and the rotating shaft.

[0017] Preferably, the guide component has a columnar guide end extending toward the rotating shaft, the top block has a guide hole, the guide hole is sleeved on the guide end, and the shapes of the guide hole and the guide end are arranged to limit relative rotation.

[0018] In this solution, the shapes of the guide hole and the guide end are utilized to limit the rotation of the top block relative to the guide component, which helps to simplify the internal structure of the water pump and further helps to reduce the volume of the water pump.

[0019] Preferably, the moving block has a limiting hole, the limiting hole is sleeved on the rotating shaft, and the shapes of the rotating shaft and the limiting hole are arranged to achieve relative circumferential fixation.

[0020] In this solution, the shapes of the rotating shaft and the limiting hole are utilized to realize the relative circumferential fixation of the moving block and the rotating shaft, which is helpful to simplify the internal structure of the water pump and further help to reduce the volume of the water pump.

[0021] Preferably, the rotating shaft includes a limiting portion and a shaft body, the limiting portion is arranged at the end of the shaft body and extends from the end toward a direction away from the shaft body, the limiting hole is sleeved on the limiting portion, and the end of the limiting portion away from the shaft body is used for the top block to impact.

[0022] In this solution, the limiting part is arranged at the end of the shaft body, so that after the moving block cooperates with the limiting part, the end surface of the limiting part can be used as the action surface for the top block to impact, which is beneficial to improving the compactness and orderliness of the internal structure of the water pump.

[0023] Preferably, the water pump comprises a relatively fixed first shaft limiting component, the second end of the rotating shaft cooperates with the first shaft limiting component, and a movable space is provided inside the first shaft limiting component.

[0024] In this solution, the rotating shaft can move within the movable space provided by the first shaft limiting component, that is, move within a limited distance, thus preventing the rotating shaft from moving unrestrictedly and affecting the normal operation of the water pump.

[0025] Preferably, a reset member is provided in the activity space, one end of the reset member abuts against the first shaft limiting component, and the other end of the reset member abuts against the rotating shaft.

[0026] In this solution, a reset member is used to apply a reset force to the shaft, so that the shaft can be reset to the starting position before being hit by the top block, preparing for the next rotor-shaft bonding, that is, the bonding between the rotor and the shaft can be broken multiple times.

[0027] Preferably, the water pump includes a relatively fixed second shaft limiting component, the second shaft limiting component is arranged on the side where the first end of the rotating shaft is located, and the second shaft limiting component is shared with the shaft support or shared with the guide component or are independently arranged.

[0028] In this solution, the second shaft limiting component limits the movement range of the rotating shaft in the direction of its first end, so that the top block, the moving block and the rotating shaft can move within a limited distance, thereby preventing the top block, the moving block and the rotating shaft from moving unrestrictedly and affecting the normal operation of the water pump.

[0029] The positive and progressive effects of the utility model are:

[0030] When the shaft and the rotor are bonded due to impurities, the shaft rotates around its axis driven by the rotor, and the moving block fixed to the shaft circumferentially rotates with the shaft and moves along the axis of the shaft. During the movement of the moving block along the axis of the shaft, the top block screwed with the moving block moves in the opposite direction driven by the moving block. During the movement, the top block hits the shaft to cause the shaft to be displaced in the axial direction, thereby destroying the bonding force between the shaft and the rotor, and separating the shaft from the rotor, thus avoiding the situation where the rotor and the shaft are bonded and the pump is stuck. In addition, the bonding force between the rotor and the shaft can be converted into an axial force along the shaft after passing through the moving block and the top block in turn and then transmitted to the shaft again. In other words, the separation of the rotor and the shaft is automatically achieved by utilizing the bonding force between the shaft and the rotor, without the need for maintenance personnel to operate from the outside. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of the cross-sectional structure of a water pump in a preferred embodiment of the utility model in an initial state.

[0032] Figure 2 for Figure 1 A magnified view of the local structure.

[0033] Figure 3 This is a schematic cross-sectional structure diagram of a water pump according to a preferred embodiment of the utility model in another state.

[0034] Figure 4 for Figure 3 A magnified view of the local structure.

[0035] Description of Reference Numerals

[0036] Water pump 100

[0037] Rotor 1

[0038] Reel 2

[0039] Mounting section 21

[0040] Limiting part 22

[0041] Axis body 23

[0042] Axis support 3

[0043] Move Block 4

[0044] Limit hole 41

[0045] Top block 5

[0046] Guide hole 51

[0047] Guide component 6

[0048] Lead end 61

[0049] Snap ring 7

[0050] Gasket 8

[0051] First axis limiting component 9

[0052] Reset 91

[0053] Second shaft limiting component 10 DETAILED DESCRIPTION

[0054] A preferred embodiment is given below, and the present invention is described more clearly and completely in conjunction with the accompanying drawings.

[0055] like Figure 1-Figure 4 As shown, this embodiment discloses a water pump 100, including a rotor 1 and a rotating shaft 2, wherein the rotor 1 is sleeved on the rotating shaft 2 and moves circumferentially relative to the rotating shaft 2 with the rotating shaft 2 as the center, and the water pump 100 also includes a shaft support 3, a moving block 4, a top block 5 and a guide component 6 arranged at the first end of the rotating shaft 2, wherein the rotating shaft 2 is arranged to rotate around its axial direction and move within a limited distance along its axial direction; the shaft support 3 and the guide component 6 are both fixed relative to the water pump, and a space is provided in the shaft support 3 for the moving block 4 and the top block 5 to move along the axial direction of the rotating shaft 2; the moving block 4 is fixed relative to the circumference of the rotating shaft 2 and is movably arranged relative to the axial direction of the rotating shaft 2, the top block 5 is fixed relative to the circumference of the guiding component 6 and is movably arranged relative to the axial direction of the guiding component 6, the moving block 4 is spirally matched with the shaft support 3, the top block 5 is spirally matched with the moving block 4, the rotation direction between the moving block 4 and the shaft support 3 is the same as the rotation direction between the top block 5 and the moving block 4, and the moving block 4 drives the top block 5 to move toward the rotating shaft 2 and hit the rotating shaft 2.

[0056] When the rotating shaft 2 and the rotor 1 are bonded due to impurities, the rotating shaft 2 rotates around its axial direction driven by the rotor 1, and the moving block 4 fixed to the rotating shaft 2 rotates with the rotating shaft 2 and moves along the axial direction of the rotating shaft 2. In the process of the moving block 4 moving along the axial direction of the rotating shaft 2, the top block 5 screwed with the moving block 4 moves in the opposite direction driven by the moving block 4. The top block 5 hits the rotating shaft 2 during the movement so that the rotating shaft 2 is displaced in the axial direction, thereby destroying the bonding force between the rotating shaft 2 and the rotor 1, and the rotating shaft 2 is separated from the rotor 1, thus avoiding the situation that the rotor 1 and the rotating shaft 2 are bonded and cause the water pump 100 to be stuck. In addition, the bonding force between the rotor 1 and the rotating shaft 2 can be converted into an axial force along the rotating shaft 2 after passing through the moving block 4 and the top block 5 in sequence and then transmitted to the rotating shaft 2 again. In other words, the separation of the rotor 1 and the rotating shaft 2 is automatically achieved by using the bonding force between the rotating shaft 2 and the rotor 1, without the need for maintenance personnel to operate from the outside.

[0057] Preferably, the pitch of the spiral structure between the moving block 4 and the shaft support 3 is smaller than the pitch of the spiral structure between the moving block 4 and the top block 5, so that the moving speed of the top block 5 can be greater than the moving speed of the moving block 4, thereby increasing the impact force of the top block 5 on the rotating shaft 2.

[0058] like Figure 2 and Figure 4 As shown, the water pump 100 further includes a snap ring 7, the rotating shaft 2 has a mounting portion 21 that does not overlap with the radial projection of the rotor 1, the snap ring 7 is arranged on the mounting portion 21 and fixed relative to the rotating shaft 2, the axial distance between the snap ring 7 and the rotor 1 is less than the axial movement range of the rotating shaft 2, so that the snap ring 7 can move axially with the rotating shaft 2, and the rotating shaft 2 can be separated from the rotor 1 when the rotating shaft 2 moves axially, and after the snap ring 7 moves axially with the rotating shaft 2, the snap ring 7 is clamped between the rotating shaft 2 and the rotor 1, so that the rotating shaft 2 and the rotor 1 still cannot rotate relative to each other, thereby facilitating the subsequent reset. And before the rotating shaft 2 moves axially, the snap ring 7 is located at the mounting portion 21 of the rotating shaft 2, and since the mounting portion 21 does not overlap with the radial projection of the rotor 1, the snap ring 7 will not affect the normal operation of the water pump 100. It should be noted that the mounting portion 21 refers to the portion where the radial projection of the inner wall surface of the rotor 1 and the outer wall surface of the rotating shaft 2 do not overlap.

[0059] The subsequent reset can specifically be that when the water pump 100 detects that the rotor 1 and the shaft 2 are stuck in forward rotation for a certain period of time, the controller of the water pump 100 is used to drive the rotor 1 to rotate in the opposite direction, and the shaft 2 rotates in the opposite direction with the rotor 1, and the moving block 4 is reset to the starting position driven by the shaft 2.

[0060] like Figure 2 and Figure 4As shown, specifically, the water pump 100 also includes a gasket 8, which is sleeved on the rotating shaft 2. The radial projections of the gasket 8 and the rotor 1 do not overlap, and the retaining ring 7 is arranged between the gasket 8 and the rotating shaft 2, so that the retaining ring 7 does not affect the normal operation of the water pump 100, and when the retaining ring 7 moves axially with the rotating shaft 2, the retaining ring 7 can move between the rotating shaft 2 and the rotor 1.

[0061] The guide component 6 limits the top block 5 from rotating relative to the guide component 6 , so that the top block 5 can move axially relative to the rotating shaft 2 driven by the moving block 4 .

[0062] like Figure 2 and Figure 4 As shown, the guide component 6 has a columnar guide end 61 extending toward the rotating shaft 2, and the top block 5 has a guide hole 51, and the guide hole 51 is sleeved on the guide end 61, and the shapes of the guide hole 51 and the guide end 61 are set to limit relative rotation. Using the shapes of the guide hole 51 and the guide end 61 to limit the rotation of the top block 5 relative to the guide component 6 is beneficial to simplifying the internal structure of the water pump 100, and further to reducing the volume of the water pump 100. Specifically, the shapes of the guide hole 51 and the guide end 61 can be prismatic, semicircular or any other shape that can limit relative rotation. In other embodiments, the relative non-rotation between the top block 5 and the guide component 6 can be achieved by other fastening structures.

[0063] The moving block 4 has a limiting hole 41, which is sleeved on the rotating shaft 2. The shapes of the rotating shaft 2 and the limiting hole 41 are set to achieve relative circumferential fixation. The relative circumferential fixation of the moving block 4 and the rotating shaft 2 is achieved by using the shapes of the rotating shaft 2 and the limiting hole 41, which is conducive to simplifying the internal structure of the water pump 100, and further conducive to reducing the volume of the water pump 100.

[0064] like Figure 2 and Figure 4 As shown, the rotating shaft 2 includes a limiting portion 22 and a shaft body 23. The limiting portion 22 is arranged at the end of the shaft body 23 and extends from the end toward a direction away from the shaft body 23. The limiting hole 41 is sleeved on the limiting portion 22. The end of the limiting portion 22 away from the shaft body 23 is used for the top block 5 to hit. The limiting portion 22 is arranged at the end of the shaft body 23, so that after the moving block 4 cooperates with the limiting portion 22, the end surface of the limiting portion 22 can be used as the action surface for the top block 5 to hit, which is conducive to improving the compactness and orderliness of the internal structure of the water pump 100.

[0065] The limiting portion 22 and the limiting hole 41 of the rotating shaft 2 may be in the shape of a prism, a semicircle or any other shape that can limit relative rotation. Of course, the entire shape of the rotating shaft 2 may also be the aforementioned shape.

[0066] like Figure 1 and Figure 3As shown, the water pump 100 includes a relatively fixed first shaft limiting component 9, the second end of the rotating shaft 2 cooperates with the first shaft limiting component 9, and a movable space is arranged inside the first shaft limiting component 9, that is, the rotating shaft 2 can move within the movable space provided by the first shaft limiting component 9, that is, it can move within a limited distance, thus preventing the rotating shaft 2 from moving unrestrictedly and affecting the normal operation of the water pump 100.

[0067] A reset member 91 is provided in the activity space, one end of the reset member 91 abuts against the first shaft limiting member 9, and the other end abuts against the rotating shaft 2. The reset member 91 is used to apply a reset force to the rotating shaft 2, so that the rotating shaft 2 can be reset to the starting position before being hit by the top block 5, in preparation for the next bonding of the rotor 1 and the rotating shaft 2, that is, the bonding between the rotor 1 and the rotating shaft 2 can be broken in a cycle for multiple times. Specifically, the reset member 91 can be a spring, or other mechanical structure that can generate an axial force along the rotating shaft 2. In other embodiments, the reset member 91 may not be provided, and in this case, the number of times the bonding of the rotor 1 and the rotating shaft 2 is broken is limited.

[0068] like Figure 2 and Figure 4 As shown, the water pump 100 includes a relatively fixed second shaft limiting component 10, and the second shaft limiting component 10 is arranged on the side where the first end of the rotating shaft 2 is located. The second shaft limiting component 10 limits the moving range of the rotating shaft 2 in the direction where the first end thereof is located, so that the top block 5, the moving block 4 and the rotating shaft 2 can move within a limited distance, which can prevent the top block 5, the moving block 4 and the rotating shaft 2 from moving unrestricted and affecting the normal operation of the water pump 100. The second shaft limiting component 10 can be formed by using the shaft support 3, or can be formed by using the guide component 6, or can be independently arranged. Specifically, a baffle can be arranged at the end of the shaft support 3 or the guide component 6 facing away from the rotating shaft 2, and the baffle can be integrated with the shaft support 3 or the guide component 6, or an independent baffle can be arranged. Of course, the second axial limiting portion 22, the shaft support 3 and the guide component 6 can be integrated.

[0069] In this embodiment, the moving block 4 is threadedly connected to the shaft support 3, and the top block 5 is threadedly connected to the moving block 4. In other embodiments, the moving block 4 and the shaft support 3, and the top block 5 and the moving block 4 can be connected through spiral guide grooves and protrusions.

[0070] Figure 1 The figure shows the relative positions of the moving block 4, the top block 5, the rotating shaft 2, the retaining ring 7 and the rotor 1 in the initial state of the water pump 100. Figure 3 The figure shows the relative positions of the moving block 4, the top block 5, the rotating shaft 2, the snap ring 7 and the rotor 1 after the rotating shaft 2 moves along its axial direction. Figure 1 Transformed into Figure 3 (Right now Figure 2 Transformed into Figure 4 ). When the shaft 2 rotates in the reverse direction, the water pump 100 is Figure 3 Transformed into Figure 1 (Right now Figure 4 Transformed into Figure 2 ).

[0071] The operation process of the water pump 100 is specifically as follows:

[0072] When the gap between the rotor 1 and the rotating shaft 2 is not bonded by impurities, the rotating shaft 2 does not rotate, and the rotor 1 moves circumferentially around the rotating shaft 2; when the rotor 1 and the rotating shaft 2 are bonded by impurities, the rotating shaft 2 rotates positively around its axis driven by the rotor 1, and the moving block 4 located at the first end of the rotating shaft 2 moves in a direction away from the rotating shaft 2 driven by the rotating shaft 2, and the top block 5 moves toward the rotating shaft 2 and hits the rotating shaft 2 driven by the moving block 4, so that the rotating shaft 2 is displaced along its axial direction, so that the bonding between the rotating shaft 2 and the rotor 1 is broken, and at this time, the retaining ring 7 moves with the rotating shaft 2 together with the shaft 2, and the retaining ring 7 is clamped between the shaft 2 and the rotor 1, so that the shaft 2 and the rotor 1 still cannot rotate relative to each other. When the water pump 100 detects that the rotor 1 and the shaft 2 are stuck in the forward rotation for a certain period of time, the controller of the water pump 100 drives the rotor 1 to rotate in the opposite direction, and the shaft 2 rotates in the opposite direction with the rotor 1. The moving block 4 is driven by the shaft 2 to reset to the starting position, and the shaft 2 is reset to the starting position before being hit by the top block 5 under the action of the reset member 91. At this time, the water pump returns to normal operation. When the rotor 1 and the shaft 2 are stuck again due to impurities, the previous process is repeated.

[0073] Although the specific implementations of the utility model are described above, those skilled in the art should understand that this is only an example, and the protection scope of the utility model is defined by the attached claims. Those skilled in the art can make various changes or modifications to these implementations without departing from the principle and essence of the utility model, but these changes and modifications fall within the protection scope of the utility model.

Claims

1. A water pump, comprising a rotor and a rotating shaft, wherein the rotor is sleeved on the rotating shaft and moves circumferentially relative to the rotating shaft with the rotating shaft as the center, characterized in that: The water pump further comprises a shaft support, a moving block, a top block and a guide component arranged at the first end of the rotating shaft, wherein: The rotating shaft is configured to rotate about its axial direction and move within a limited distance along its axial direction; The shaft support and the guide component are both fixedly arranged relative to the water pump, and a space is provided in the shaft support for the moving block and the top block to move along the axial direction of the rotating shaft; The moving block is fixed relative to the circumference of the rotating shaft and is movably arranged relative to the axial direction of the rotating shaft, the top block is fixed relative to the circumference of the guiding component and is movably arranged relative to the axial direction of the guiding component, the moving block is spirally matched with the shaft support, the top block is spirally matched with the moving block, the rotation direction between the moving block and the shaft support is the same as the rotation direction between the top block and the moving block, and the moving block drives the top block to move toward the rotating shaft and hit the rotating shaft.

2. The water pump according to claim 1, characterized in that The pitch of the helical structure between the moving block and the shaft support is smaller than the pitch of the helical structure between the moving block and the top block.

3. The water pump according to claim 1, characterized in that: The water pump also includes a retaining ring, the rotating shaft has a mounting portion that does not overlap with the radial projection of the rotor, the retaining ring is arranged on the mounting portion and fixed relative to the rotating shaft, and the axial distance between the retaining ring and the rotor is smaller than the axial movement range of the rotating shaft.

4. The water pump according to claim 3, characterized in that: The water pump further comprises a gasket, which is sleeved on the rotating shaft, wherein the radial projections of the gasket and the rotor do not overlap, and the retaining ring is arranged between the gasket and the rotating shaft.

5. The water pump according to claim 1, characterized in that: The guide component has a columnar guide end extending toward the rotating shaft, and the top block has a guide hole, which is sleeved on the guide end. The shapes of the guide hole and the guide end are configured to limit relative rotation.

6. The water pump according to claim 1, characterized in that The moving block has a limiting hole, and the limiting hole is sleeved on the rotating shaft. The shapes of the rotating shaft and the limiting hole are arranged to achieve relative circumferential fixation.

7. The water pump according to claim 6, characterized in that The rotating shaft includes a limiting portion and a shaft body, the limiting portion is arranged at the end of the shaft body and extends from the end toward a direction away from the shaft body, the limiting hole is sleeved on the limiting portion, and the end of the limiting portion away from the shaft body is used for the top block to impact.

8. The water pump according to claim 1, characterized in that The water pump comprises a relatively fixed first shaft limiting component, the second end of the rotating shaft cooperates with the first shaft limiting component, and a movable space is arranged inside the first shaft limiting component.

9. The water pump according to claim 8, characterized in that A reset member is arranged in the activity space, one end of the reset member abuts against the first shaft limiting component, and the other end of the reset member abuts against the rotating shaft.

10. The water pump according to claim 1, characterized in that The water pump comprises a relatively fixed second shaft limiting component, which is arranged on the side where the first end of the rotating shaft is located, and the second shaft limiting component is shared with the shaft support or shared with the guide component or arranged independently of each other.

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