阅读说明：本技术 轴承密封件及供水泵 (Bearing seal and water supply pump ) 是由 户所信二 于 2019-06-17 设计创作，主要内容包括：本发明提供一种提高防水性的轴承密封件及供水泵,轴承密封件具备：第一密封件(80),其形成有使旋转轴穿插的第一开口部；第二密封件(90),其形成有使旋转轴穿插的第二开口部,并且与第一密封件(80)沿旋转轴(51)方向进行卡合。另外,在被第一密封件及第二密封件包围的旋转轴(51)的周围形成密封疏水性液体的密封空间(110)。(The invention provides a bearing seal and a water supply pump for improving waterproofness, the bearing seal comprises: a first seal (80) having a first opening through which the rotating shaft is inserted; and a second seal (90) which is formed with a second opening through which the rotating shaft is inserted and which engages with the first seal (80) in the direction of the rotating shaft (51). A sealed space (110) for sealing the hydrophobic liquid is formed around the rotating shaft (51) surrounded by the first seal and the second seal.)

1. A bearing seal, comprising:

a first seal member having a first opening through which the rotating shaft is inserted;

a second seal member having a second opening through which the rotating shaft is inserted, and engaging with the first seal member in the direction of the rotating shaft,

a sealing space for sealing a hydrophobic liquid is formed around the rotating shaft surrounded by the first seal and the second seal.

2. The bearing seal of claim 1,

the sealed space includes a first receiving portion that is open on the second seal side of the first seal, and a second receiving portion that is open on the first seal side of the second seal.

3. The bearing seal of claim 1,

the first seal has a cylindrical engaging portion on the second seal side,

the second seal has an engaged portion that engages with the engaging portion on the first seal side.

4. The bearing seal of claim 2,

the first seal has a cylindrical engaging portion on the second seal side,

the second seal has an engaged portion that engages with the engaging portion on the first seal side.

5. The bearing seal according to any one of claims 1 to 4,

the first seal member has a peripheral projection in a circumferential direction.

6. A water supply pump is characterized by comprising,

a first seal member having a first opening through which the rotating shaft is inserted;

a second seal member having a second opening through which the rotating shaft is inserted, and engaged with the first seal member in the direction of the rotating shaft;

a motor connected to one end side of the rotating shaft;

an impeller connected to the other end side of the rotating shaft;

a case that houses the first seal and the second seal,

a sealing space for sealing a hydrophobic liquid is formed around the rotating shaft surrounded by the first seal and the second seal.

7. The water supply pump according to claim 6,

the housing has: a seal housing portion that houses the first seal and the second seal; and a diameter reduction portion that supports the first seal from a leading end side of the rotating shaft and reduces the diameter in the rotating shaft direction.

Technical Field

The invention relates to a bearing seal and a water supply pump.

Technical Field

Conventionally, a sealing technique for an underwater pump for sucking up water has been disclosed. For example, in the underwater pump disclosed in japanese patent application laid-open No. 9-280193, an impeller disposed in a pump case is attached to a lower end portion of a rotor shaft inserted into a shaft center portion of a motor disposed in a head cover (head cover), and liquid flowing into the pump case is discharged upward as the impeller rotates. The rotor shaft is shaft sealed by a pair of oil seals provided on the lower side of the bearing.

Disclosure of Invention

However, in the shaft seal structure of the rotor shaft disclosed in japanese unexamined patent publication No. 9-280193, it is estimated that water leakage from between the shaft and the oil seal is insufficient to secure waterproofness.

The invention aims to provide a bearing sealing member and a water supply pump which improve waterproofness.

The bearing seal of the present invention is characterized by comprising: a first seal member having a first opening through which the rotating shaft is inserted; and a second seal member having a second opening portion inserted through the rotating shaft and engaged with the first seal member in the direction of the rotating shaft. A sealing space for sealing the hydrophobic liquid is formed around the rotating shaft surrounded by the first seal and the second seal.

The water supply pump of the present invention is characterized by comprising: a first seal member having a first opening through which the rotating shaft is inserted; a second seal member having a second opening portion inserted through the rotating shaft and engaged with the first seal member in the direction of the rotating shaft; a motor connected to one end side of the rotating shaft; an impeller connected to the other end side of the rotating shaft; and a housing that houses the first seal and the second seal, and that forms a sealed space for sealing a hydrophobic liquid around the rotating shaft surrounded by the first seal and the second seal.

According to the present invention, a bearing seal and a water supply pump with improved water resistance can be provided.

Drawings

Fig. 1 is a plan perspective view of a drainage toy according to an embodiment of the present invention.

Fig. 2 is an internal perspective view of a drainage toy according to an embodiment of the present invention.

Fig. 3 is a schematic plan view showing an internal structure of the water supply pump according to the embodiment of the present invention.

Fig. 4 is a sectional view of the water supply pump corresponding to fig. 3, taken along the line IV-IV in accordance with the embodiment of the present invention.

Fig. 5 is a view showing a first seal according to an embodiment of the present invention, wherein (a) is a plan perspective view and (b) is an internal perspective view.

Fig. 6 is a view showing a second seal according to an embodiment of the present invention, wherein (a) is a plan perspective view and (b) is an internal perspective view.

Detailed Description

Embodiments of the present invention will be described below. Fig. 1 is a plan perspective view of a waterproof toy 10. Fig. 2 is a perspective view of the interior of drainage toy 10. The drainage toy 10 is a toy which sucks water while floating the main body 20 on a water surface such as a swimming pool or a bath tub, and which can discharge the sucked water by the shower head part 30. Water is sucked from the bottom surface of the main body 20. In addition, the head part 30 may be attached to the main body part 20 side or detached from the main body part 20. The user can attach or detach the head unit 30 to or from the head holder 25 of the main body unit 20 to play a water discharge game or a water walk game.

In the following description, the side of the head holder 25 provided to the main body 20 is referred to as the front side, and the opposite side is referred to as the rear side. The lower side of fig. 1 is referred to as "lower" and the opposite side is referred to as "upper".

As shown in fig. 1, the drainage toy 10 includes a main body portion 20 having a substantially circular shape in a plan view, and a head portion 30 engaged with the head holder 25 of the main body portion 20. The main body 20 has a closed hollow structure. A floating member (not shown) such as foam having a lower mass density than water is accommodated in the main body 20. The floating member is filled around each internal component to fill the internal space of the main body 20.

As shown in fig. 2, the main body 20 has a suction port 21 and a power supply box 22 at the bottom. Water is drawn from the suction port 21 by a water supply pump 40 provided inside the main body 20. In addition, the suction port 21 has a mesh-like filter 21a at an inlet portion thereof, and foreign substances can be prevented from entering the pump 41 by the filter 21 a. In the present embodiment, the filter 21a is formed integrally with a detachable cover provided at the inlet of the suction port 21. In addition, the power supply box 22 houses a power supply such as a battery for driving the water supply pump 40.

As shown in fig. 1 and 2, a side peripheral recess 23 formed as an annular groove over the entire periphery is provided on the outer peripheral side surface of the main body 20. A discharge port 23b of the water supply pump 40 in the main body 20 is provided on the bottom 23a side of the concave groove of the side circumferential concave portion 23. One end of the hose 31 is connected to the discharge port 23b, and the other end of the hose 31 is connected to the head unit 30. Also, the hose 31 may be wound on the side circumferential surface of the main body portion 20 along the bottom portion 23a of the side circumferential recessed portion 23. As shown in fig. 2, the main body 20 has a substantially rectangular hook 24 having an opening hole 24a formed in a rear side surface thereof. The hook 24 is formed to be rotatable with the base end side as an axis. By rotating the hook 24 to the main body portion 20 side, the hose 31 wound around the side circumferential recessed portion 23 can be adjusted to an appropriate length to fix the hose 31 to the main body portion 20 side. Further, the handle portion 26 is provided at the rear side of the main body portion 20 so as to be able to enter and exit rearward.

As shown in fig. 1, the head unit 30 connected to the main body unit 20 via the hose 31 has a head switching unit 33 having a plurality of drain ports 32a and 32b formed at the distal end thereof. Further, a substantially cylindrical head main body 30a is formed on the hose 31 side of the head unit 30. The head unit 30 can switch the water drawn up from the suction port 21 to be discharged from either one of the discharge ports 32a and 32b by rotating the head switching unit 33, thereby discharging the water. Accordingly, the drainage toy 10 can arbitrarily adjust the drainage distance and the drainage range by the head switch 33.

The main body 20 has a head holder 25 on the front side of its side peripheral surface. A substantially C-shaped arm portion 25a is formed on the tip end side of the head holder 25. The head unit 30 can engage the head main body 30a into the arm portion 25a by inserting the hose 31 through the C-ring cut of the arm portion 25 a. Thus, the head unit 30 is detachably mounted on the head holder 25. Further, the head holder 25 is pivotably attached to the side face side of the main body portion 20, and the angle of the arm portion 25a can be adjusted in the horizontal direction or the plumb direction or the intermediate position thereof. Therefore, the head unit 30 held by the head holder 25 can be fixed at an arbitrary angle in the horizontal direction or the plumb direction or at an intermediate position thereof according to the adjustment angle of the head holder 25.

The main body 20 has a power switch 27 on a side surface. When the power switch 27 is turned on, the water supply pump 40 is driven. The drainage toy 10 sucks water from the suction port 21 connected to one side of the water supply pump 40 and sends the water to the discharge port 23b connected to the other side of the water supply pump 40. The water sent to the discharge port 23b passes through the inside of the hose 31 and is discharged from the discharge ports 32a and 32b of the head unit 30.

Next, the internal structure of the water supply pump 40 will be described. Fig. 3 is a schematic plan view showing the internal configuration of the water supply pump 40. Fig. 4 is a sectional view corresponding to the section IV-IV of the water supply pump 40 shown in fig. 3. In fig. 4, the water supply pump 40 includes a motor 50, a housing 60 that houses the motor 50, an impeller 54 that is driven to rotate by the motor 50, and a flow path space 70 that houses the impeller 54 and the like to form a water path.

The motor 50 is formed in a substantially cylindrical shape as a whole. Fig. 4 shows a part of the motor 50 on the side of the rotary shaft 51. The motor 50 has a substantially short cylindrical protruding portion 52 having a smaller diameter than the entire diameter of the motor 50 on the side of the rotary shaft 51. A bearing projecting portion 53 having a substantially short cylindrical shape and having a smaller outer diameter than the projecting portion 52 is formed at an end portion of the projecting portion 52 on the side of the rotation shaft 51. The rotary shaft 51 extends downward from a substantially central position of the bearing projection 53. The impeller 54 is connected to the front end side of the rotary shaft 51. The housing 60 includes: a motor housing 61 for housing the motor 50; a middle diameter part 62 for accommodating the protruding part 52; and a seal housing portion 63 that houses the first seal 80 and the second seal 90, which are the bearing seals 100 disposed so as to cover the bearing protruding portion 53 and the rotating shaft 51. The motor housing 61, the intermediate diameter portion 62, and the seal housing 63 are formed in a cylindrical shape. The motor housing portion 61, the intermediate diameter portion 62, and the seal housing portion 63 are formed as substantially circular opening portions. Although not shown, the motor housing 61 is closed at an upper end housing the motor 50.

An annular step portion 61a is formed from the lower end side of the motor housing portion 61 toward the inside in the diameter direction. The intermediate diameter portion 62 extends downward from the inner edge of the step portion 61a toward the rotation shaft 51. The stepped portion 61a is formed substantially at right angles to the motor housing portion 61 and the intermediate diameter portion 62.

An annular step portion 62a is formed from the lower end side of the intermediate diameter portion 62 to the inside in the diameter direction. The seal housing 63 extends downward from the inner edge of the step 62a toward the rotary shaft 51. The stepped portion 62a is formed substantially at right angles to the intermediate diameter portion 62 and the seal housing portion 63. Further, a protruding portion 62b having a substantially rectangular shape in a cross-sectional view protruding toward the motor housing portion 61 is formed on an inner edge of the stepped portion 62 a. The protruding portion 62b is formed in an annular shape on the inner edge of the stepped portion 62 a. The inner peripheral surface of the protruding portion 62b is formed continuously with the inner peripheral surface of the seal housing portion 63. The seal housing portion 63 has a reduced diameter portion 63a formed to be contracted in the direction of the rotation shaft 51 on the lower end side. The opening 63b is formed by the inner edge of the reduced diameter portion 63 a. The opening 63b is formed as a substantially circular through hole having a smaller inner diameter than the seal housing 63.

The flow path space 70 includes an impeller housing portion 71, a suction portion 72, and a discharge portion 73. The impeller housing portion 71 can house the intermediate diameter portion 62 and the seal housing portion 63, which are parts of the housing 60, and the impeller 54. The inner peripheral side surface of the impeller housing portion 71 is formed in a substantially circumferential shape, and an annular inclined surface 711 formed in a mortar shape is provided radially outward of the impeller 54. The inclined surface 711 is formed to have a diameter gradually increasing from the lower side to the upper side.

The suction unit 72 extends below the impeller housing 71 housing the impeller 54 and the like, and is connected to the suction port 21 having the filter 21 a. The suction portion 72 has an opening 712 connected to the suction port 21 below the impeller housing portion 71. As shown in fig. 3, a plurality of opening portions 712 are provided, and are formed in a fan shape in a plan view.

The discharge portion 73 extends above the impeller 54 and on the side surface of the impeller housing portion 71. The discharge portion 73 has a discharge port 23b as a substantially cylindrical joint, and the discharge port 23b is fitted in the hose 31.

The impeller 54 has a base 54a of a substantially circular plate shape and a wing 54b provided below the base 54 a. The wing portion 54b is formed in a slightly curved rectangular plate shape, and is provided extending in the clockwise direction from the radially inner side to the radially outer side of the base portion 54a as shown in fig. 3. The impeller 54 rotates in the counterclockwise direction of fig. 3. Therefore, as indicated by the two-dot chain line in fig. 4, water is guided onto the inclined surface 711 in the outer direction from the vicinity of the center of the impeller 54 as indicated by the two-dot chain line in fig. 4. The water directed toward the inclined surface 711 by the rotation of the impeller 54 is guided above the inclined surface 711 while rotating counterclockwise in fig. 3, and is discharged to the discharge portion 73 extending in the substantially line connecting direction of the impeller 54 in sequence as shown by the two-dot chain line. Therefore, the water supply pump 40 can supply the water supplied from the suction portion 72 side to the hose 31 side.

Next, the structure of the first seal 80 will be described. Fig. 5(a) is a plan perspective view of the first seal 80, and fig. 5(b) is an internal perspective view of the first seal 80.

The first seal 80 is generally cylindrical in shape as a whole, and is formed of a flexible member such as rubber. The first seal 80 has a substantially circular groove 81 on one end side where the motor 50 is disposed, and a first housing portion 82 and an engagement portion 83 on the other end side opposite to the motor 50. The concave groove 81 is formed inside a substantially cylindrical outer cylinder 811 having a bottom. The inner circumferential surface 811a and the outer circumferential surface 811b of the outer tube portion 811 are formed substantially parallel to the axis Z of the first seal 80.

The annular front end surface 812 of the outer tube portion 811 and the circular bottom surface 813 of the concave groove 81 are formed as flat surfaces substantially perpendicular to the axis Z. A circular first opening 814 is formed in a substantially central position of the bottom surface 813 so as to penetrate vertically. An inner wall 814a of the first opening portion 814 is formed substantially parallel to the axis Z. The rotary shaft 51 is inserted through the first opening 814, see fig. 4.

The first housing portion 82 is formed inside a substantially cylindrical engaging portion 83 having a bottom. The first opening 814 is formed at a substantially central position of the bottom surface 821 of the first housing portion 82. The bottom surface 821 is formed in a substantially mortar shape that decreases in diameter from below to above.

The front end surface 831 of the engaging portion 83 is formed as an annular flat surface substantially perpendicular to the axis Z. The inner circumferential surface 832a and the outer circumferential surface 832b of the engaging portion 83 are formed substantially parallel to the axis Z. The outer peripheral surface 832b is formed to have a smaller diameter than the outer peripheral surface 811b of the outer cylinder 811. As shown in fig. 4, the outer peripheral surface 832b and the inner peripheral surface 811a of the outer cylinder 811 are formed to have substantially the same diameter. The upper end of the outer circumferential surface 832b and the lower end of the outer circumferential surface 811b are connected via an annular step 815. The step 815 is also formed as a flat surface substantially perpendicular to the axis Z.

The boundary between the inner circumferential surface 832a and the bottom surface 821 and the stepped portion 815 are disposed at substantially the same vertical height, as shown in fig. 4.

Next, the structure of the second seal 90 will be described. Fig. 6(a) is a plan perspective view of the second seal 90, and fig. 6(b) is an internal perspective view of the second seal 90.

The second seal 90 is generally cylindrical in shape as a whole, and is formed of a flexible member such as rubber. The second seal 90 has an engaged portion 91 and a second housing portion 93 on one end side where the first seal 80 is disposed, and has a substantially circular projecting portion 94 on the other end side opposite to the first seal 80.

The engaged portion 91 is formed in a substantially circular groove shape inside the substantially cylindrical outer tube portion 92. The distal end surface 921 of the outer tube portion 92 is formed as an annular flat surface substantially perpendicular to the axis Z. The front end surface 921 has a tapered portion 921c formed in an R-shape chamfered shape on an inner edge connected to the inner peripheral surface 921 a. The tapered portion 921c is also formed in a substantially annular shape in plan view.

The engaged portion 91 has a second housing portion 93 having a circular groove shape at a substantially central position of the bottom surface 911 formed substantially parallel to the distal end surface 921. Therefore, the bottom surface 911 is formed substantially in a ring shape. The second housing portion 93 has an inner peripheral surface 931 substantially parallel to the axis Z, and a mortar-shaped inclined portion 932 extending from a lower end of the inner peripheral surface 931 and gradually reducing in diameter from an upper side to a lower side. A second opening 933 of a substantially circular shape penetrating vertically is formed at a substantially central position of the inclined part 932. As shown in fig. 4, the rotation shaft 51 is inserted into the second opening 933.

An outer peripheral projection 924 extending annularly in the circumferential direction is formed on the outer peripheral surface 921b of the outer tube portion 92 on the projecting portion 94 side. The outer peripheral projection 924 is formed in a generally convex circular arc shape in a longitudinal sectional view.

The projection 94 is formed in a substantially cylindrical shape with the axis Z as a center. The base end side of the projecting portion 94 is connected to the outer circumferential projection 924 via a stepped portion 941 and a tapered portion 941 a. The stepped portion 941 is formed as a flat surface substantially perpendicular to the axis Z on the outer periphery of the projecting portion 94. The tapered portion 941a is formed in an R-shaped chamfered shape on the outer periphery of the stepped portion 941. The tip surface 943 of the projection 94 is formed as a substantially circular flat surface substantially perpendicular to the axis Z, and a second opening 933 is formed near the center. An R-shaped chamfered tapered portion 943a is formed on the outer edge of the distal end face 943.

Further, a boundary portion between the inner peripheral surface 921a and the bottom surface 911 is disposed above the stepped portion 941, see fig. 4. In addition, an upper edge of the second opening part 933, in other words, a boundary part between the second opening part 933 and the bottom surface 911 is disposed at a position below the stepped part 941.

Next, the storage state of the first seal 80 and the second seal 90 will be described with reference to fig. 4 to 6. The outer peripheral surface 832b of the engaging portion 83 and the inner peripheral surface 921a of the engaged portion 91 are formed to have substantially the same diameter. When the engaging portion 83 is engaged with the engaged portion 91, the bottom surface 911 contacts the front end surface 831, and the front end surface 921 contacts the step portion 815. Since the inner peripheral surface 832a of the engaging portion 83 and the inner peripheral surface 931 of the second housing portion 93 are formed to have substantially the same diameter, the inner peripheral surfaces 832a and 931 of the first housing portion 82 and the second housing portion 93 are continuously connected when the first seal 80 and the second seal 90 are engaged with each other.

When the engaging portion 83 of the first seal 80 engages with the engaged portion 91 of the second seal 90, the tip of the engaging portion 83 is guided by the tapered portion 921c provided in the outer cylindrical portion 92 of the second seal 90, and the engaging portion 83 and the engaged portion 91 can be easily engaged in the Z-axis direction.

Further, since the outer peripheral surface 811b of the first seal 80 and the outer peripheral surface 921b of the second seal 90 are formed to have substantially the same diameter, the outer peripheral surface 811b and the outer peripheral surface 921b are continuously connected when the first seal 80 and the second seal 90 are engaged with each other. The outer peripheral surface 811b and the outer peripheral surface 921b are formed to have a diameter slightly smaller than the inner diameter of the seal housing portion 63, and the outermost diameter of the outer peripheral projection 924 is formed to be slightly larger than the inner diameter of the seal housing portion 63. Therefore, as shown in fig. 4, when the first seal 80 and the second seal 90 are housed in the seal housing portion 63, the outer circumferential projection 924 is compressed radially inward by the inner circumferential surface of the seal housing portion 63 and shrinks. Therefore, the gap between the second seal 90 and the seal housing 63 is closed.

The front end face 812 of the outer tube 811 is pressed downward by the projection 52 of the motor 50. Therefore, the lower surface of the protruding portion 52 and the distal end surface 812 of the first seal 80 can be sealed. In addition, the reduced diameter portion 63a supports the second seal 90 from the lower side, and the step portion 941 of the second seal 90 and the peripheral edge of the opening portion 63b substantially abut against each other. Therefore, the space inside the seal housing 63, which is the space below the opening 63b outside the impeller housing 71, and the space above the opening 63b inside the impeller housing 63, can be shielded.

As shown in fig. 4, the rotary shaft 51 is inserted into the first opening 814 and the second opening 933 in a state where the first seal 80 and the second seal 90 are accommodated in the seal accommodating portion 63. When the rotary shaft 51 is inserted into the openings 814 and 933 by engaging the first seal 80 and the second seal 90, a sealed space 110 is formed around the rotary shaft 51 surrounded by the first housing portion 82 and the second housing portion 93. In the present embodiment, the sealed space 110 is filled with a hydrophobic liquid such as a lubricating oil. Therefore, even if water enters between the rotary shaft 51 and the second opening 933 due to the water pressure of the impeller housing 71 or the like, water leakage into the second housing 93 can be prevented. Thus, the water resistance of the bearing seal 100 and the water supply pump 40, which engage the first seal 80 and the second seal 90 in the direction of the rotation shaft 51, can be improved.

While the embodiments of the present invention have been described above, the present invention is not limited to the embodiments, and can be implemented in various forms. For example, the first seal 80 may have a groove-shaped engaged portion, the second seal 90 may have an engaging cylindrical portion that engages with the engaged portion, and the first seal 80 and the second seal 90 may be engaged with each other in the direction of the rotation shaft 51.

Industrial applicability of the invention

The invention provides a bearing sealing member and a water supply pump capable of improving waterproofness.

Description of the symbols

10 … drainage toy 20 … main body part

21a … filter of 21 … suction inlet

22 … power box 23 … side circumference concave part

23a … bottom 23b … discharge outlet

24 … hook 24a … open hole

25a … arm 25 … spray head holder

26 … handle 27 … power switch

30 … nozzle tip 30a … nozzle tip body

31 … hose 32a … drain

32b … drain 33 … head switch

40 … Water supply Pump 41 … Pump

50 … Motor 51 … rotating shaft

52 … convex part 53 … bearing convex part

54 … impeller 54a … base

54b … wing 60 … casing

61 … Motor housing 61a … step

62 … step portion with diameter 62a …

62b … protruding part 63 … seal accommodating part

63a … reduced diameter portion 63b … opening

70 … flow path space 71 … impeller housing part

72 … suction port 73 … discharge port

80 … primary seal 81 … groove

82 … second storage part 83 … clamping part

90 … second seal 91 … is captured by the engagement

92 … outer barrel 93 … second receiving part

94 … lobe 100 … bearing seal

110 … sealing space 711 … inclined surface

712 … opening 811 … outer barrel

811a … inner peripheral surface 811b … outer peripheral surface

812 … front end 813 … bottom surface

814 … inner wall of the first opening 814a …

815 … bottom surface of step 821 …

831 … front end face 832a … inner peripheral surface

832b … bottom surface of 911 … of outer peripheral surface

921 … front end surface 921a … inner peripheral surface

921b … peripheral surface 921c … taper

924 … peripheral projection 931 … peripheral surface

932 … inclined part 933 … second opening

941 … stepped portion 941a … tapered portion

943 … taper 943a … on front face

Z … axis