Ball inside hidden toilet flushing pump and toilet

Abstract

The utility model discloses a kind of ball internal implicit closestool flushing water pump and closestool, wherein ball internal implicit closestool flushing water pump includes rotating power main body, first pump cavity, first impeller, second pump cavity, second impeller;Rotating power main body includes shell, stator, rotor, rotor has the shaft that protrudes both ends of shell and can switch positive and negative rotation;The both ends of shaft are respectively equipped with first turntable, second turntable;The first turntable, second turntable all have turntable body, the outer end of turntable body has a plurality of arc-shaped flippers arranged around the outer circumferential spacing of shaft, adjacent two arc-shaped flippers form guide slot, ball is provided in guide slot on turntable body, the near-axis end of guide slot is throughly provided with ball inlet and outlet hole corresponding the outer end of turntable body, the inner end of turntable body is equipped with pearl hiding groove, pearl hiding groove and ball inlet and outlet hole are through in circumferential direction.The such, reduce ball abrasion, prolong service life, and further improve switching outlet control reliability.

Description

Technical Field

[0001] This utility model relates to the field of toilet flushing pumps, and in particular to a ball bearing concealed toilet flushing pump and a toilet. Background Technology

[0002] The toilet's tank flushing mechanism splits the water into two streams. One stream flows to the jet nozzle at the bottom of the toilet bowl to siphon away waste, while the other stream flows to the flush nozzle at the top of the bowl to rinse the inner skirt of the toilet bowl. During use, the water flow needs to be switched. The industry standard is to use additional power to switch between blocking and opening either outlet, resulting in high production costs and significant energy consumption during operation.

[0003] Later, the applicant researched a toilet flushing pump with a double impeller and a double pump chamber. Its structure is simple and ingenious. It uses a single rotating power unit to control the double impeller and double pump chamber. The water switching control is relatively reliable. Moreover, it only requires one rotating power unit, eliminating the need for a motor to control the sealing part, which helps control production costs and is more energy-efficient during use.

[0004] The current industry standard for the service life of toilet flushing pumps is 200,000 cycles. Some customers have raised higher requirements, such as longer service life and more precise water output control, in order to improve the quality stability and user experience of toilet flushing pumps and toilets.

[0005] Based on this, the applicant further researched and improved the technology to obtain a new technical solution that meets the higher requirements of the product. Utility Model Content

[0006] In view of this, the present invention addresses the deficiencies of the existing technology, and its main purpose is to provide a ball bearing concealed toilet flushing pump and toilet, which reduces ball wear, extends service life, and further improves the reliability of water switching control.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A ball bearing concealed toilet flushing pump includes a rotary power body, a first pump chamber, a first impeller, a second pump chamber, and a second impeller. The rotary power body includes a housing and a stator and a rotor disposed within the housing. The rotor has a rotating shaft extending from both ends of the housing and capable of switching between forward and reverse rotation. A first rotating disk and a second rotating disk are respectively installed at both ends of the rotating shaft. The first pump chamber and the second pump chamber are located outside both ends of the housing and each has an inlet and an outlet. The first impeller is located inside the first pump chamber, and the second impeller is located inside the second pump chamber. Both the first and second turntables have a turntable body. The outer end of the turntable body has multiple arc-shaped paddles arranged around the outer circumference of the rotating shaft. A guide groove is formed between two adjacent arc-shaped paddles. A ball is provided in the guide groove on the turntable body. A ball inlet and outlet hole is provided through the near-axial end of the guide groove on the outer end of the turntable body. A ball storage groove is provided at the inner end of the turntable body. The ball storage groove and the ball inlet and outlet hole are connected in the circumferential direction.

[0008] As a preferred embodiment, the axial projections of the ball groove and the ball inlet / outlet hole are located on the same circumference, which is concentrically arranged with the rotating shaft.

[0009] As a preferred embodiment, more than half of the inner end of the ball-retaining groove is used as a stop ball.

[0010] As a preferred embodiment, the inner wall surface of the ball inlet / outlet hole is a guiding transition surface.

[0011] As a preferred embodiment, both the first impeller and the second impeller have an enclosure portion arranged around the rotating shaft. The interior of the enclosure portion forms a turntable receiving cavity. Correspondingly, the first turntable and the second turntable are located within the turntable receiving cavity of the first impeller and the second impeller, respectively. The inner wall surface of the enclosure portion is provided with a plurality of locking guide protrusions arranged at circumferential intervals. An auxiliary guide groove is formed between two adjacent locking guide protrusions. The number of locking guide protrusions and auxiliary guide grooves is a positive integer multiple of the number of arc-shaped paddles.

[0012] As a preferred embodiment, the housing is provided with a stator cavity and a rotor cavity that are separated from each other. The two ends of the rotor cavity are respectively connected to the inner cavity of the first pump cavity and the inner cavity of the second pump cavity, and the bead groove is connected to the rotor cavity inward.

[0013] As a preferred embodiment, the ball bearing inlet / outlet hole extends through the inner and outer ends of the turntable body.

[0014] As a preferred embodiment, both ends of the rotor are provided with receiving platforms arranged around the rotating shaft. The outer end of the receiving platform is provided with a number of circumferentially spaced stop protrusions. The stop protrusions are provided corresponding to the inner end of the bead storage groove. At least two stop protrusions are provided with an installation groove. The inner end of the turntable body is provided with a corresponding installation protrusion. The installation protrusion is installed in the corresponding installation groove. A gap is formed between the stop protrusion and the turntable body. The gap passes through the bead storage groove and the rotor cavity.

[0015] As a preferred embodiment, the arc-shaped paddle, guide groove, ball inlet / outlet hole, ball storage groove, locking guide protrusion, and auxiliary guide groove are all arranged at uniform intervals around the rotating shaft.

[0016] A toilet that uses a ball-bearing concealed toilet flush pump as described in any of the preceding items.

[0017] Compared with the prior art, this utility model has obvious advantages and beneficial effects. Specifically, as can be seen from the above technical solution, it mainly involves providing a ball inlet / outlet hole through the near-axial end of the guide groove at the outer end of the turntable body, and providing a ball storage groove at the inner end of the turntable body. The ball storage groove and the ball inlet / outlet hole are circumferentially connected. In this way, when the turntable is disengaged from the impeller, the ball enters the ball inlet / outlet hole along the guide groove and is contained within the ball storage groove, preventing the ball from flying out abnormally. This further improves the reliability of the water switching control. Moreover, since the ball is contained within the ball storage groove, it effectively reduces ball shaking, reduces ball wear, extends service life, and prevents abnormal noise.

[0018] Furthermore, since the housing is equipped with stator cavities and rotor cavities that are separated from each other, and the two ends of the rotor cavity are respectively connected to the inner cavities of the first pump cavity and the second pump cavity, and the ball groove is connected to the rotor cavity inward, the water in the guide groove, the ball inlet and outlet holes and the ball groove are cleared in time, avoiding water from remaining in the ball groove and causing the balls to shake, further reducing the friction of the balls, keeping the balls dimensionally stable, which is conducive to further improving the reliability and service life of the water switching control.

[0019] To more clearly illustrate the structural features and effects of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0020] Figure 1 This is a perspective view of a ball bearing concealed toilet flushing pump according to an embodiment of the present utility model. Figure 2 This is an exploded view of the ball bearing concealed toilet flushing pump according to an embodiment of the present invention. Figure 3 This is an axial cross-sectional view of the ball bearing concealed toilet flushing pump according to an embodiment of the present utility model. Figure 4 yes Figure 3 A magnified view of a portion of the image; Figure 5 This is an exploded view of the first turntable, ball bearings, and rotor according to an embodiment of the present invention (showing a partial structure at one end of the rotor). Figure 6 This is a perspective view of the first turntable according to an embodiment of the present utility model; Figure 7 This is a perspective view of the impeller component 31 (with corresponding enclosure and half blades) according to an embodiment of the present utility model; Figure 8 This is an axial cross-sectional view of a partial structure of the impeller component 51, the second turntable, the ball bearings, and the other end of the rotor, according to an embodiment of this utility model. Figure 9This is an assembly diagram of a partial structure of the impeller component 51, the second turntable, the ball bearings, and the other end of the rotor, according to an embodiment of this utility model. Figure 10 This is a radial cross-sectional view (three-dimensional view) of a partial structure of the impeller component 51, the second rotating disk, the ball bearing, and the other end of the rotor, according to an embodiment of this utility model. Figure 11 This is a radial cross-sectional view (top view, with the first pump chamber on top and the second pump chamber on the bottom) of a partial structure of the impeller component 51, the second rotating disk, the ball bearing, and the rotor at the other end of an embodiment of this utility model. Figure 12 This is a radial cross-sectional view (three-dimensional view) of a partial structure of the impeller component 51, the second rotating disk, the ball bearing, and the other end of the rotor, according to an embodiment of this utility model. Figure 13 This is a radial cross-sectional view of the impeller component 51, the second rotating disk, the ball bearings, and the other end of the rotor in an embodiment of this utility model (viewed from below, with the first pump chamber on top and the second pump chamber on the bottom). Detailed Implementation

[0021] Please refer to Figures 1 to 13 As shown, it illustrates the specific structure of an embodiment of the present invention.

[0022] In the description of this utility model, it should be noted that the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] A ball-bearing concealed toilet flushing pump includes: A rotating power unit 100 includes a housing 110 and a stator 120 and a rotor 130 disposed within the housing 110. The housing 110 contains a stator cavity 1 and a rotor cavity 2 separated from each other. The stator 120 is disposed within the stator cavity 1, and the rotor 130 is disposed within the rotor cavity 2. Water in the rotor cavity 2 will not enter the stator cavity 1. The rotor 130 has a rotating shaft 131 extending from both ends of the housing 110 and capable of switching between forward and reverse rotation. The stator 120 is arranged around the rotor 130, and the rotating shaft 131 passes through the rotor 120. 30 center; the rotating shaft 131 can switch between forward and reverse rotation, and the rotating power body 100 can control the forward and reverse rotation of the rotating shaft 131. This is a mature technology, namely the existing forward and reverse motor technology. Typically, the motor is connected to a PCBA board, and software is set on the chip or controller of the PCBA board. The software controls the rotating shaft 131 of the motor to move forward and reverse along with the rotor 130. The forward and reverse rotation duration and switching time point can be freely set to meet the flushing needs of the toilet's top flush and bottom flush. In this embodiment, the housing 110 includes a main housing and an end cap 1103. The main housing includes an end wall 1104 and an outer cylinder wall 1101 and an inner cylinder wall 1102 connected to one end of the end wall 1104. The outer cylinder wall 1101 surrounds the periphery of the inner cylinder wall 1102. The stator 120 is disposed in the area between the outer cylinder wall 1101 and the inner cylinder wall 1102. The rotor 130 is disposed in the area surrounded by the inner cylinder wall 1102. The rotor 130 and the inner cylinder wall 1102 maintain a water passage gap 5. The end cap 1103 is sealed and assembled at the open end of the inner cylinder wall 1102 and the outer cylinder wall 1104, which facilitates the installation of the stator 120. The end cap 1103 and the end wall 1104 are provided with clearance through holes facing each other to allow the two ends of the rotor to pass through.

[0024] A first turntable 132 is mounted on one end of the rotating shaft 131, and the first turntable 132 is located outside one end of the housing 110; a second turntable 133 is mounted on the other end of the rotating shaft 131, and the second turntable 133 is located outside the other end of the housing 110; both the first turntable 132 and the second turntable 133 have a turntable body, and the outer end of the turntable body has a plurality of arc-shaped paddles arranged at intervals around the outer circumference of the rotating shaft 131. Preferably, the arc-shaped paddles are involute-shaped. The involute shape of the arc-shaped paddles 1321 of the first turntable 132 extends towards the clockwise direction, and the involute shape of the arc-shaped paddles 1331 of the second turntable 133 extends towards the counterclockwise direction. A guide groove is formed between two adjacent arc-shaped levers. Movable balls are installed in the guide grooves on the turntable body, with one ball in each guide groove. A ball inlet / outlet hole is provided at the outer end of the turntable body, corresponding to the near-axial end of the guide groove, thus connecting the ball inlet / outlet hole to the guide groove. Preferably, the ball inlet / outlet hole connects the inner and outer ends of the turntable body. A ball-retaining groove is recessed outwards at the inner end of the turntable body. The outer end of the ball-retaining groove is a blind end, meaning it only connects to the inner end of the turntable body and not the outer end. The ball-retaining groove and the ball inlet / outlet hole are circumferentially connected. The axial projections of the ball-retaining groove and the ball inlet / outlet hole are located on the same circumference, which is concentric with the rotation axis. The inner end of the ball-retaining groove stops more than half of the ball. Preferably, the inner wall surface of the ball inlet / outlet hole is a guiding transition surface. The guiding transition surface serves as a spatial connector between the vertical hole and the horizontal hole, forming a three-dimensional spiral transition pipe. Therefore, it is a spatial spiral continuum, similar to an involute topological connection between the vertical hole and the horizontal hole. Its cross-section gradually changes from a circular shape at the vertical end to the target shape at the horizontal end. The curvature is continuous and there are no abrupt sharp corners. The inner wall is smooth to meet the low flow resistance requirement.

[0025] A first pump chamber 200 is located outside one end of the housing 110, and the first pump chamber 200 has a first inlet J1 and a first outlet C1. The first impeller 300 is located inside the first pump chamber 200. It is assembled from two impeller components 31 and 32. Specifically, one impeller component 31 is provided with a corresponding enclosure and half-blade, while the other impeller component 32 is provided with a corresponding impeller inlet annular opening and the other half-blade. During assembly, the half-blade and the other half-blade are fitted and positioned by the locking protrusion and the locking groove.

[0026] The second pump chamber 400 is located outside the other end of the housing 110. The second pump chamber 400 has a second inlet J2 and a second outlet C2. The second impeller 500 is located inside the second pump chamber 400 and is assembled from two impeller components 51 and 52. Specifically, one impeller component 51 is provided with a corresponding enclosure and half-blade, while the other impeller component 52 is provided with a corresponding impeller inlet annular opening and the other half-blade. During assembly, the half-blade and the other half-blade are fitted and positioned by the locking protrusion and the locking groove.

[0027] Both the first impeller 300 and the second impeller 500 have an enclosure portion surrounding the rotating shaft 131. The rotating shaft 131 passes through the central hole of the enclosure portion but does not form a tight fit with the central hole. Generally, a gap is maintained or the contact friction is insufficient to support the rotating shaft 131 to directly drive the enclosure portion. If the first turntable 132 is not connected to the first impeller 300, the rotating shaft 131 cannot directly make the first impeller 300 rotate or rotate continuously. Similarly, if the second turntable 133 is not connected to the second impeller 500, the rotating shaft 131 cannot directly make the second impeller 500 rotate or rotate continuously. The enclosing portion forms a turntable receiving cavity 311. Correspondingly, the first turntable 132 and the second turntable 133 are located within the turntable receiving cavities 311 of the first impeller 300 and the second impeller 500, respectively. The inner wall of the enclosing portion is provided with a plurality of locking guide protrusions 312 arranged at circumferential intervals. An auxiliary guide groove 313 is formed between adjacent locking guide protrusions 312. The number of locking guide protrusions 312 and auxiliary guide grooves 313 is a positive integer multiple of the number of arc-shaped paddles. The arc-shaped paddles, guide grooves, ball bearing inlet / outlet holes, ball bearing storage grooves, locking guide protrusions, and auxiliary guide grooves are all arranged at uniform circumferential intervals around the rotating shaft 131. In this embodiment, there are six arc-shaped paddles, guide grooves, ball bearing inlet / outlet holes, and ball bearing storage grooves, and twelve locking guide protrusions and auxiliary guide grooves. The larger number of these elements improves the reliability of switching between the "connected" and "disconnected" states. Of course, actual testing shows that two or more pieces are sufficient for switching. Regarding the shape of the curved paddle, its preferred design is an involute shape. A slight modification to a shape close to an involute can also meet usage requirements and falls within the scope of this patented technology. The locking guide protrusion ensures the ball bearings are securely locked in the "connected" state, improving switching accuracy and reliability. Furthermore, by using the locking guide protrusion, the extension length of the curved paddle can be shortened, avoiding the risk of breakage and improving product reliability.

[0028] The two ends of the rotor cavity 2 are respectively connected to the inner cavity of the first pump cavity 200 (first impeller cavity 3) and the inner cavity of the second pump cavity 400 (second impeller cavity 4). The ball groove is connected to the rotor cavity 2 inward, so that water can be drained in time and avoid remaining in the ball groove, which would cause the ball 61 to shake. In this embodiment, both ends of the rotor 130 are provided with receiving platforms 134 arranged around the rotating shaft 131. The outer end of the receiving platform 134 is provided with a plurality of circumferentially spaced stop protrusions 1341. The stop protrusions 1341 are provided corresponding to the inner end of the ball storage groove. At least two stop protrusions 1341 are provided with mounting grooves 1342. The inner end of the turntable body is provided with mounting protrusions 1323 and 1333. The mounting protrusions 1323 are located between two adjacent ball storage grooves 1324 and 1334, specifically between adjacent ball storage grooves 1324 and ball inlet / outlet holes 1322 and 1332. It can also play a role in strengthening the overall structural strength of the turntable. The mounting protrusions 1323 are installed in the corresponding mounting grooves 1342. The mounting protrusions 1323 can be fixedly installed in the mounting grooves 1342 by means of tight fitting, adhesive fixing, welding fixing, etc. A gap 6 is formed between the stop protrusion 1341 and the turntable body, allowing the bead storage groove 1324 to pass through the rotor cavity 2 inward. Here, an avoidance step 1343 is provided on the outer periphery of the stop protrusion 1341 to facilitate the guidance and unblocking of water.

[0029] When the shaft 131 rotates clockwise, the first turntable 132 and the second turntable 133 rotate clockwise along with the shaft 131. The ball bearing 61 on the first turntable 132 rolls out from the ball storage groove 1324 to the far end of the guide groove and abuts against the arc-shaped paddle and the locking guide protrusion 312 on the first turntable 132, so that the first turntable 132 and the first impeller 300 are connected. The first impeller 300 rotates clockwise along with the first turntable 132, so that the first outlet C1 can discharge water. At the same time, the ball bearing 62 on the second turntable 133 falls into the ball storage groove 1334 through the ball inlet and outlet hole 1332. The second turntable 133 is disconnected from the second impeller 500, so that the second outlet C2 cannot discharge water. When the shaft 131 reverses, the first turntable 132 and the second turntable 133 also reverse. The ball bearing 62 on the second turntable 133 rolls out from the ball storage groove 1334 to the far end of the guide groove and abuts against the arc-shaped paddle 1331 and the locking guide protrusion 512 on the second turntable 133, so that the second turntable 133 and the second impeller 500 are connected. The second impeller 500 reverses with the second turntable 133, so that the second outlet C2 can discharge water. At the same time, the ball bearing 61 on the first turntable 132 falls into the ball storage groove 1324 through the ball inlet and outlet hole 1322. The first turntable 132 is disconnected from the first impeller 300, so that the first outlet C1 cannot discharge water.

[0030] It should be noted that the inner wall of the auxiliary guide groove includes three wall sections connected in a circumferential direction: a first locking guide surface M1, a second locking guide surface M2, and a groove deep concave surface M3. The three wall sections form a U-shape or are approximately U-shaped. The first locking guide surface M1 and the second locking guide surface M2 are both inclined surfaces, and the inclination angle of the first locking guide surface M1 is smaller than that of the second locking guide surface M2. The far-axis ends of each arc-shaped paddle are located on the same circumference A, and the near-axis ends of each locking guide protrusion are located on the same circumference B. Circumference B is located on the outer circumference of circumference A, maintaining a small gap, for example, 0.2-1.0 mm, to avoid the far-axis ends of the arc-shaped paddles colliding with the near-axis ends of the locking guide protrusions. In the "connected" state, the centrifugal rolling force generated by the reverse rotation of the corresponding turntable presses the ball against the first locking guide surface M1 and the outer arc surface of the arc-shaped lever. When switching to the "disconnected" state, the centrifugal rolling force generated by the forward rotation of the corresponding turntable causes the ball to roll along the first locking guide surface M1 into the auxiliary guide groove. Guided by the stop of the second locking guide surface M2, it rolls towards the guide groove (along the inner arc surface of the arc-shaped lever) and falls into the ball inlet / outlet hole, and enters the ball storage groove. During continuous forward rotation, it remains hidden in the ball storage groove to avoid large-scale shaking and maintain the "disconnected" state. When switching to the "connected" state, the balls, propelled by the centrifugal force generated by the reverse rotation of the corresponding turntable, enter the guide groove from the ball inlet / outlet hole. At the far-axis end of the guide groove, the balls abut against the first locking guide surface M1 and the outer arc surface of the arc-shaped lever, achieving "connection" and maintaining "connection" during continuous reverse rotation. Thus, without the need for additional electronic components, it uses a simple mechanical structure to automatically switch between different water outlets when the rotating power unit 100 outputs rotational power, better meeting environmental protection and energy-saving requirements.

[0031] Actual testing shows that this type of ball-bearing concealed toilet flush pump can be used more than 300,000 times. A testing method is provided: the ball-bearing concealed toilet flush pump is placed in the water tank and connected to an electrical control box. The control box counts the number of forward and reverse rotation cycles of the motor (first forward rotation, then reverse rotation, then forward rotation again, which counts as one cycle). This continuous day and night cycle is performed until 300,000 cycles are reached (far exceeding the industry standard of 200,000 cycles, meeting the high requirements of all current customers). Then, the ball-bearing concealed toilet flush pump is removed, parts are disassembled, and the wear of the ball bearings is inspected (minor wear on the ball bearing surface does not affect its continued normal operation).

[0032] Specifically:

[0033] In addition, a toilet is provided in which a ball-bearing concealed toilet flush pump as described in any of the preceding claims is used.

[0034] The key design feature of this invention is that a ball bearing inlet / outlet hole is provided at the near-axial end of the guide groove on the outer end of the turntable body, and a ball bearing storage groove is provided at the inner end of the turntable body. The ball bearing storage groove and the ball bearing inlet / outlet hole are connected circumferentially. In this way, when the turntable is disengaged from the impeller, the ball bearing enters the ball bearing inlet / outlet hole along the guide groove and is contained within the ball bearing storage groove, preventing the ball bearing from flying out abnormally. This further improves the reliability of water switching control. Moreover, since the ball bearing is contained within the ball bearing storage groove, it effectively reduces ball bearing wobbling, reduces ball bearing wear, extends service life, and prevents abnormal noise. Because the housing contains separate stator and rotor cavities, with both ends of the rotor cavity communicating with the inner cavities of the first and second pump cavities respectively, and the ball bearing groove extending inward through the rotor cavity, water in the guide groove, ball bearing inlet / outlet holes, and ball bearing groove is promptly cleared. This prevents water from accumulating in the ball bearing groove and causing ball bearing wobbling, further reducing ball bearing friction and maintaining dimensional stability. This contributes to improved reliability and service life of the water switching control. Furthermore, its simple and ingenious structure makes it easy to manufacture and assemble, suitable for mass production and widespread application.

[0035] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A ball-bearing concealed toilet flushing pump, comprising a rotary power body, a first pump chamber, a first impeller, a second pump chamber, and a second impeller; the rotary power body includes a housing and a stator and a rotor disposed within the housing, the rotor having a rotating shaft extending from both ends of the housing and capable of switching forward and reverse rotation; a first rotating disk and a second rotating disk are respectively mounted on both ends of the rotating shaft; the first pump chamber and the second pump chamber are respectively located outside both ends of the housing, and each has an inlet and an outlet; the first impeller is located within the first pump chamber, and the second impeller is located within the second pump chamber; characterized in that, Both the first and second turntables have a turntable body. The outer end of the turntable body has multiple arc-shaped paddles arranged around the outer circumference of the rotating shaft. A guide groove is formed between two adjacent arc-shaped paddles. A ball is provided in the guide groove on the turntable body. A ball inlet and outlet hole is provided through the near-axial end of the guide groove on the outer end of the turntable body. A ball storage groove is provided at the inner end of the turntable body. The ball storage groove and the ball inlet and outlet hole are connected in the circumferential direction.

2. The ball bearing concealed toilet flushing pump according to claim 1, characterized in that, The axial projection of the ball groove and the ball inlet / outlet hole is located on the same circumference, which is concentric with the rotating shaft.

3. The ball bearing concealed toilet flushing pump according to claim 1, characterized in that, More than half of the inner end of the ball stop in the ball groove.

4. The ball bearing concealed toilet flushing pump according to claim 1, characterized in that, The inner wall surface of the ball bearing inlet / outlet hole is a guiding transition surface.

5. The ball bearing concealed toilet flushing pump according to claim 1, characterized in that, Both the first impeller and the second impeller have an enclosure portion arranged around the rotating shaft. The interior of the enclosure portion forms a turntable receiving cavity. Correspondingly, the first turntable and the second turntable are located in the turntable receiving cavity of the first impeller and the second impeller, respectively. The inner wall surface of the enclosure portion is provided with a plurality of locking guide protrusions arranged at circumferential intervals. An auxiliary guide groove is formed between two adjacent locking guide protrusions. The number of locking guide protrusions and auxiliary guide grooves is a positive integer multiple of the number of arc-shaped paddles.

6. The ball bearing concealed toilet flushing pump according to claim 1, characterized in that, The housing is provided with a stator cavity and a rotor cavity that are separated from each other. The two ends of the rotor cavity are respectively connected to the inner cavity of the first pump cavity and the inner cavity of the second pump cavity. The bead groove is connected to the rotor cavity inward.

7. The ball bearing concealed toilet flushing pump according to claim 6, characterized in that, The ball bearing inlet and outlet holes penetrate the inner and outer ends of the turntable body.

8. The ball bearing concealed toilet flushing pump according to claim 6, characterized in that, Both ends of the rotor are provided with receiving platforms arranged around the rotating shaft. The outer end of the receiving platform is provided with several circumferentially spaced stop protrusions. The stop protrusions are provided corresponding to the inner end of the bead storage groove. At least two stop protrusions are provided with mounting grooves. The inner end of the turntable body is provided with corresponding mounting protrusions. The mounting protrusions are installed in the corresponding mounting grooves. A gap is formed between the stop protrusions and the turntable body. The gap passes through the bead storage groove and the rotor cavity.

9. The ball bearing concealed toilet flushing pump according to claim 5, characterized in that, The arc-shaped paddle, guide groove, ball inlet / outlet hole, ball storage groove, locking guide protrusion, and auxiliary guide groove are all arranged at uniform intervals around the rotating shaft.

10. A toilet, characterized in that, Its application includes the ball-bearing concealed toilet flush pump as described in any one of claims 1 to 9.

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