Improved water pump

Abstract

According to the improved water pump, due to the fact that the outer shell (28) is detachably fixed to the pump shell (5) through the first fixing piece, the impeller component is convenient to install or dismantle, and due to the fact that the impeller shaft (330) and the rotor (33) are fixedly connected to form the integral rotor component (3), when the water pump is installed or maintained, the impeller shaft (330) and the rotor (33) are fixed to form the integral rotor component (3). The pump shell (5) and the rotor part (3) can be conveniently mounted or dismounted only by closing or releasing the first fixing part, so that the impeller and the motor rotor part can be conveniently mounted or maintained or the whole rotor part (3) can be conveniently replaced. Particularly, the rotor (33) of the rotor component (3) is partially arranged in the sealed central hole (21) of the motor (2), so that a rear cover and a sealing structure of a pump shell of an existing water pump are omitted, and the water pump is more convenient to install and maintain.

Description

Technical Field

[0001] This utility model relates to a water pump, and more specifically, to an improved water pump with a detachable motor and pump shaft coaxial. Background Technology

[0002] Coaxial pumps have a simple and compact overall structure because the pump shaft and the motor shaft are the same, meaning the impeller is directly fixed to the motor (rotor) shaft or its extension shaft. As a result, they are widely used, for example, in pipeline pumps, submersible pumps, and aquarium (monitoring) tank pumps.

[0003] However, existing coaxial water pumps, because the pump casing is separate from the motor, require the removal of the pump casing when repairing and installing the pump, especially the impeller component. The pump casing needs to seal the entire impeller to prevent water entering the casing from leaking out through the impeller outlet. Therefore, a rear cover plate is usually provided, and this rear cover plate needs to be sealed to the pump casing. This makes installing or removing the pump casing time-consuming and labor-intensive when installing or repairing the impeller. Furthermore, when installing or repairing the pump shaft (motor shaft), maintenance personnel also need to install or remove the front cover of the motor. Since the impeller, including the pump shaft (motor shaft), is a moving part, it frequently requires maintenance. Therefore, there is a need for a water pump where the impeller, pump shaft, and motor shaft can be easily installed, disassembled, repaired, or even replaced.

[0004] Content of utility model

[0005] The purpose of this invention is to provide an improved water pump that is easy to install, disassemble, repair, or even replace.

[0006] To achieve the above-mentioned objectives, this utility model provides an improved water pump, comprising:

[0007] A pump casing, the pump casing including a pump casing inlet and a pump casing outlet;

[0008] An impeller includes an impeller inlet corresponding to the pump casing inlet, an impeller outlet corresponding to the pump casing outlet, an impeller shaft, and blades;

[0009] A motor driving the impeller includes a housing, a stator assembly, and a rotor. The motor has a sealed central hole along its transverse centerline. The rotor is disposed within the central hole. The stator assembly is disposed within the housing outside the central hole. The housing also includes a first bearing assembly. The housing is detachably fixed to the pump casing by a first fixing member and is mutually sealed by a first sealing member.

[0010] A baffle plate is disposed between the back of the impeller and the front end face of the housing, and a second bearing component is provided in the center of the baffle plate;

[0011] The impeller shaft is fixedly connected to the rotor and forms an integral rotor component. Thus, the first bearing component and the second bearing component respectively support the rotation of the rotor component.

[0012] The pump housing has a first flange at its rear end corresponding to the motor, and a second flange at the periphery of the front end of the housing. The first fastener is a plurality of snap-fit ​​fasteners, each of which has a fixing body. The fixing body has a transverse axis and is rotatable along the transverse axis. A first boss and a second boss extend inward from the transverse inner surface of the fixing body of the first fastener. The first boss corresponds to the outer end face of the first flange to lock the outer end face, and the second boss corresponds to the outer end face of the second flange to lock the outer end face. The distance S between the first boss and the second boss is sufficient to fix the first flange and the second flange so that the pump housing and the motor housing are locked and fixed.

[0013] Furthermore, the fixed body is rotatably connected to the outer casing via the transverse axis in order to fix the pump housing and the outer casing.

[0014] Furthermore, the fixed body is rotatably connected to the pump housing via the transverse axis in order to fix the outer shell and the pump housing.

[0015] Furthermore, a first retaining edge is extended laterally along the first boss to further secure the first flange.

[0016] Furthermore, a second retaining edge is extended laterally along the second boss to further secure the second flange.

[0017] Furthermore, the partition is detachably fixed to the front end face by the second fastener.

[0018] Furthermore, the second fixing member includes several locking blocks and corresponding slots. When the locking block is inserted into the slot, the partition and the outer shell are fixed in the circumferential direction and cannot rotate relative to each other.

[0019] Furthermore, the card block is disposed on the outer end face and extends outward from the outer end face, and correspondingly, the card slot is disposed on the front end face.

[0020] Furthermore, the card block is disposed on the front end surface and extends outward from the front end surface, and correspondingly, the card slot is disposed on the outer end surface.

[0021] Furthermore, the first sealing component is provided between the circumferential surfaces of the front end of the housing and the rear end of the pump housing so as to form a seal between the pump housing portion behind the impeller and the motor housing.

[0022] Furthermore, the first sealing component is an O-ring.

[0023] Furthermore, a second sealing component is provided between the outer end face and the front end face.

[0024] Furthermore, the second sealing component uses an O-ring.

[0025] Furthermore, a cylindrical boss extends laterally outward from the central portion of the outer end face of the partition. At the same time, a guide groove corresponding to the boss extends outward along the axis from the central hole near the front end face so that the operator can guide the installation of the rotor component by moving the partition horizontally.

[0026] Furthermore, the bottom surface of the base can be a rectangular or square plane, making it more stable to place.

[0027] The improved water pump provided by this utility model facilitates the installation or removal of the impeller assembly because the outer casing is detachably fixed to the pump housing via a first fixing member. Furthermore, since the impeller shaft is fixedly connected to the rotor to form an integral rotor assembly, the pump housing can be easily installed or removed simply by closing or releasing the first fixing member during pump installation or maintenance. This allows for convenient installation or maintenance of the impeller and rotor, or replacement of the entire rotor assembly. In particular, because the rotor portion of the rotor assembly is housed in the sealed central hole of the motor, the rear cover and sealing structure of the existing pump housing are eliminated, further simplifying installation and maintenance. Attached Figure Description

[0028] Figure 1 This is an overall structural diagram of one embodiment of the present utility model.

[0029] Figure 2 yes Figure 1 A schematic diagram of the rotor component in an embodiment.

[0030] Figure 3 yes Figure 1 A schematic diagram of the structure of the motor in an embodiment.

[0031] Figure 4 yes Figure 1 A schematic diagram of the pump casing in an embodiment.

[0032] Figure 5 yes Figure 1 A schematic diagram of the structure of one embodiment of the first fastener.

[0033] Figure 6 It is a display Figure 5A partial structural diagram of the first clamping edge of the first fastener.

[0034] Figure 7 It is a display Figure 5 A partial structural diagram of the second clamping edge of the first fastener. Detailed Implementation

[0035] The working method and features of the improved water pump of this utility model will be described in detail below with reference to the embodiments and accompanying drawings.

[0036] See Figures 1 to 3 This utility model provides an improved water pump, which includes a pump casing 5, an impeller 32, a motor 2, and a baffle 31. The pump casing 5 encloses the pump casing inlet 59 and the pump casing outlet 58 (see...). Figure 4 In this embodiment, the pump casing 5 is also provided with a filter port 53 consisting of several small holes to prevent impurities from entering the pump casing 5. The impeller 32 includes an impeller inlet 359 corresponding to the pump casing inlet 59, an impeller outlet 319 corresponding to the pump casing outlet 58, an impeller shaft 330, and blades 329. The motor 2 is used to drive the impeller 32 to rotate, and it includes a housing 28, a stator component 27, and a rotor 33. The motor 2 has a sealed, open central hole 21 along its transverse centerline. In this embodiment, the surrounding surface of the central hole 21 is provided with a sealing material layer 23 to prevent water that has entered therein from re-entering or permeating into the stator component 27 (see [link]). Figure 3 The rotor 33 is made of magnetic material and is disposed in the central hole 21. The stator component 27 is disposed in the outer shell 28 outside the central hole 21. The stator component 27 is composed of coil windings. When energized, it drives the rotor 33 to rotate through magnetic induction, thereby driving the impeller 32 to rotate, and the water pump starts to work.

[0037] The housing 28 of the motor 2 is detachably connected to the pump housing 5 via a first fixing member. The housing 28 also has a first bearing component 24, which is located at the rear of the housing 28. In this embodiment, the first bearing component 24 is a sliding bearing, which is a ring made of wear-resistant material. The housing 28 is detachably fixed to the pump housing 5 via the first fixing member, and after fixing, they are sealed together by a first sealing member (described below). The motor 2 has a base 29 for mounting and fixing. The bottom surface of the base 29 can be a rectangular or square plane, making its placement relatively stable. The partition 31 is located between the back surface 38 of the impeller 32 and the front surface 208 of the housing 28. It is mainly used to isolate the impeller 32 from the motor 2, preventing or reducing the entry of water from the pump housing 5 into the motor 2 from the front end 208. A second bearing component 310 is located in the center of the partition 31. In this embodiment, the second bearing component 310 is a sliding bearing, which is a ring made of wear-resistant material and is fixed in the center of the partition plate 31. The impeller shaft 330 passes through the central hole of the ring of the second bearing component 310, and the second bearing component 310 supports the rotation of the impeller shaft 330.

[0038] In this invention, the impeller shaft 330 is fixedly connected to the rotor 33 and forms an integral rotor component 3 (see [reference]). Figure 2 Furthermore, the partition plate 31 is also located between the impeller 32 and the rotor 33. In this embodiment, the impeller shaft (330) is made of a non-rigid material such as plastic. It passes through a hole of a corresponding diameter pre-set in the center of the rotor 33 to form an interference fit, thereby fixing it together with the rotor 33 to form the integral rotor component 3. At the same time, the impeller shaft 330 also protrudes from the rotor 33, exposing the shaft end 34, which forms a part that mates with the first bearing component 24. In this way, the first bearing component 24 and the second bearing component 310 respectively support the rotation of the impeller shaft 330 and the rotor component 3, thus supporting the rotation of the entire rotor 33. For the water pump of this utility model with low power or low head, the first bearing component 24 and the second bearing component 310 can be made of a ring made of a non-rigid material such as ABS plastic. In this way, the impeller shaft 330 and / or the shaft of the rotor 33 can be directly mounted in the middle of the ring for rotation.

[0039] See also Figure 3 and Figure 4 The pump casing 5 has a first flange 52 at its rear end corresponding to the motor 2, and a second flange 281 is provided around the front end of the motor 2. The first fixing member consists of several pieces, such as two, of a snap-fit ​​type. Each snap-fit ​​type has a fixing body 25, which has a transverse shaft 514 and is rotatable along the transverse shaft 514 (see [link]). Figure 3 and Figure 5 The way the outer casing 28 is detachably fixed to the pump housing 5 by this first fastener allows the operator to easily rotate the pump housing 5 360° relative to the outer casing 28, thereby facilitating the selection of the angle of the pump housing outlet 58 and making it convenient to use.

[0040] The inner transverse surface of the fixed body 25 extends inward to form a first boss 511 and a second boss 512, wherein the first boss 511 corresponds to the outer end face 5210 of the first flange 52 in order to lock the outer end face 5210 (see...). Figure 1 and Figure 4 The second boss 512 corresponds to the outer end surface 2811 of the second flange 281 so as to lock the outer end surface 2811 (see...). Figure 1 and Figure 3 The distance S between the first boss 511 and the second boss 512 is sufficient or suitable to fix (tighten or clamp) the first flange 52 and the second flange 281 so that the pump housing 5 and the outer casing 28 of the motor 2 can be fixed. In this embodiment, the fixing body 25 is disposed on the outer casing 28 and is rotatably connected to the outer casing 28 via the transverse shaft 514 to fix (lock) the pump housing 5 to the outer casing 28. When the operator loosens the snap-fit ​​by rotating the fixing body 25, the pump housing 5 and the outer casing 28 can be separated. Conversely, by rotating the fixing body 25 and locking the snap-fit, the pump housing 5 and the outer casing 28 can be fixed together. Of course, it can also be disposed on the pump housing 5 in the same way. Further, see Figure 6 and Figure 7 In this embodiment, the first boss 511 has a first retaining edge 5110 along the horizontal axial direction (towards the motor 2), and the second boss 512 has a second retaining edge 5120 along the horizontal axial direction (towards the pump housing 5) to further secure the first flange 52 and the second flange 281. The first retaining edge 5110 and the second retaining edge 5120 are made of a material with a certain degree of elasticity, such as ABS plastic or rubber. If the fixing body 25 is also made of a similar material, the first retaining edge 5110 and the second retaining edge 5120 can be formed together with the fixing body 25. The first retaining edge 5110 and the second retaining edge 5120 can be continuous in length or composed of several parts.

[0041] See also Figure 1A first sealing component, such as an O-ring 216, is provided between the circumferential surface 282 of the front end of the housing 28 and the circumferential surface 5220 of the opening at the rear end of the pump housing 5, so that the rear part of the impeller 32 of the pump housing 5 forms a seal with the housing 28 of the motor 2 to prevent water from leaking out of the pump.

[0042] In this embodiment, the partition 31 is positioned on the impeller shaft 330 via the second bearing component 310 and can move left and right, serving as an integral part of the rotor component 3. After the rotor component 3 is assembled, see [link to documentation]. Figure 1 and Figure 2 The partition 31 is located between the back surface 38 of the impeller 32 and the front end face 208 of the housing 28 of the motor 2, and is detachably fixed to the front end face 208 by a second fastener.

[0043] In this embodiment, the second fixing member includes several, for example, three, locking blocks 311 and correspondingly several, for example, three, locking slots 211. When the locking block 311 is inserted into the locking slot 211, the partition 31 and the outer shell 28 are fixed in the circumferential direction and cannot rotate relative to each other. The locking block 311 is disposed on the outer end face 308 and extends outward from the outer end face 308, and the locking slot 211 is disposed on the front end face 208. Similarly, the locking block 311 can also be disposed on the front end face 208 of the outer shell 28 and extend outward from the front end face 208, and the locking slot 211 is correspondingly disposed on the outer end face 308. A cylindrical boss 312 extends laterally (horizontally) outward from the central portion of the outer end face 308 of the partition plate 31. Simultaneously, a guide groove 212 corresponding to the boss 312 extends outward along the axis from the portion of the central hole 21 near the front end face 208. This allows the operator to guide the installation of the rotor component 3 by horizontally moving the partition plate 31, facilitating the quick and accurate insertion of the locking block 311 into the locking groove 211 and the insertion of the impeller shaft 330's shaft end 34 into the bearing 24 when the rotor component 3 enters the central hole 21. This unique guide design greatly facilitates the installation and disassembly of the rotor component 3, and also provides convenience for maintenance or replacement. Similarly, the second fixing member can also employ other fixing methods, such as pins or screws.

[0044] When the water pump of this invention is working, the high pressure generated on the back of the impeller 32 pushes the baffle 31, thereby pushing the entire rotor assembly 3 to move horizontally towards the front end face 208 of the motor 2. This causes the outer end face 308 of the baffle 31 to naturally adhere to or press against the front end face 208 of the motor 2, forming a certain seal. To further form a seal between the outer end face 308 and the front end face 208, in this embodiment, a second sealing component, such as an O-ring 200, can also be used between the outer end face 308 and the front end face 208 (see...). Figure 1 ).

[0045] From the above description, it is clear that the improved water pump provided by this utility model facilitates the installation or removal of the impeller assembly because the outer casing 28 is detachably fixed to the pump housing 5 by the first fixing member (clasp-type fastener). Furthermore, the impeller shaft 330 is fixedly connected to the rotor 33 to form an integral rotor assembly 3, and the impeller 32 can also be fixed together with the impeller shaft 330 after installation (see...). Figure 2 This design allows for easy installation or removal of the pump casing 5 and outer shell 28 during pump installation or maintenance, simply by closing or releasing the first fixing component. It also facilitates the installation or removal of the rotor assembly 3, enabling convenient installation or maintenance of the impeller and motor rotor, or replacement of the entire rotor assembly 3. In particular, since the rotor 33 portion of the rotor assembly 3 is housed within the sealed central hole 21 of the motor 2, while the stator assembly 27 is enclosed within the sealed outer shell 28 of the motor 2, the necessary rear cover and sealing structure of the existing pump casing are eliminated, further simplifying installation and maintenance.

[0046] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the protection scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims.

Claims

1. An improved water pump, comprising: Pump casing (5); the pump casing (5) includes a pump casing inlet (59) and a pump casing outlet (58); Impeller (32), which includes an impeller inlet (359) corresponding to the pump casing inlet (59), an impeller outlet (319) corresponding to the pump casing outlet (58), an impeller shaft (330) and blades (329); A motor (2) that drives the impeller, the motor (2) comprising a housing (28), a stator assembly (27), and a rotor (33), the motor (2) having a sealed central hole (21) along its transverse centerline, the rotor (33) being disposed within the central hole (21), the stator assembly (27) being disposed within the housing (28) outside the central hole (21), the housing (28) also having a first bearing assembly (24), the housing (28) being detachably fixed to the pump housing (5) by a first fastener and mutually sealed by a first seal; and A partition (31) is provided between the back side (38) of the impeller (32) and the front end face (208) of the outer casing (28). A second bearing component (310) is provided in the center of the partition (31). in, The impeller shaft (330) is fixedly connected to the rotor (33) and forms an integral rotor component (3). In this way, the first bearing component (24) and the second bearing component (310) respectively support the rotation of the rotor component (3). The pump housing (5) has a first flange (52) at its rear end corresponding to the motor (2), and a second flange (281) is provided on the periphery of the front end of the outer casing (28). The first fixing member adopts several snap-fit ​​fasteners, each of which has a fixing body (25). The fixing body (25) has a transverse shaft (514) and is rotatable along the transverse shaft (514). A first boss (511) and a second boss (512) extend inward from the transverse inner surface of the fixing body (25) of the first fixing member. The first boss (511) corresponds to the outer end face (5210) of the first flange (52) to lock the outer end face (5210), while the second boss (512) corresponds to the outer end face (2811) of the second flange (281) to lock the outer end face (2811), and the distance S between the first boss (511) and the second boss (512) is sufficient to fix the first flange (52) and the second flange (281) so that the pump housing (5) and the outer casing (28) of the motor (2) are locked and fixed.

2. The improved water pump as described in claim 1, characterized in that, The fixed body (25) is rotatably connected to the outer casing (28) via the transverse shaft (514) so ​​as to fix the pump casing (5) to the outer casing (28).

3. The improved water pump as described in claim 1, characterized in that, The fixed body (25) is rotatably connected to the pump housing (5) via the transverse shaft (514) so ​​as to fix the outer shell (28) to the pump housing (5).

4. The improved water pump as described in claim 1, characterized in that, A first retaining edge (5110) extends laterally along the first boss (511) to further secure the first flange (52); a second retaining edge (5120) extends laterally along the second boss (512) to further secure the second flange (281).

5. The improved water pump as described in claim 1, characterized in that, The bottom surface of the base (29) of the motor (2) can be a rectangular or square plane, so that it can be placed more stably.

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