A water pump

Abstract

The present invention discloses a water pump, which includes an impeller, a pump body and a cutter platform. The pump body has a rotating shaft, and the impeller includes an impeller body, a buffer shaft sleeve, a buffer shaft inner sleeve and a buffer elastic member. The buffer shaft sleeve is inserted into the sleeve of the impeller body, the rotating shaft is connected to the buffer shaft sleeve in a transmission manner, and the outer wall of the buffer shaft sleeve is provided with a first protrusion structure. The buffer shaft inner sleeve is provided in the sleeve of the impeller body, the buffer shaft sleeve passes through the buffer shaft inner sleeve, and the first protrusion structure of the buffer shaft sleeve drives the impeller body to rotate through the buffer shaft inner sleeve. The buffer elastic member is provided in the buffer shaft inner sleeve, and the buffer shaft sleeve passes through the buffer elastic member. The buffer elastic member is designed in the impeller to be sleeved on the buffer shaft sleeve, and the buffer elastic member abuts against the impeller body, so that the impeller body and the buffer shaft sleeve are elastically connected. When debris is blocked at the front end of the impeller, the impeller body can retreat to avoid clogging by debris and prevent the impeller from being stuck. The present invention can be widely used in the field of water pump technology.

Description

Technical Field

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

[0002] Water pumps are commonly used equipment for sewage treatment. During the use of water pumps, sewage is often mixed with debris. Since the impeller of the existing water pumps does not have a cutting function, when slightly larger debris enters the water pump, the debris cannot pass through the impeller, which can easily clog or jam the impeller, causing the water pump to fail to operate normally or even cause damage to the water pump. Summary of the invention

[0003] In order to solve at least one of the above technical problems, the present invention provides a water pump, and the technical solution adopted is as follows.

[0004] The water pump provided by the present invention comprises an impeller, a pump body and a knife platform, wherein the knife platform is located at the front end of the impeller, the pump body has a rotating shaft, the impeller comprises an impeller body, a buffer shaft sleeve, a buffer shaft inner sleeve and a buffer elastic member, the front end of the impeller body has a blade, and the blade has a blade; the buffer shaft sleeve is inserted into the shaft sleeve of the impeller body, the rotating shaft is inserted into the buffer shaft sleeve, the rotating shaft is transmission-connected with the buffer shaft sleeve, and the outer side wall of the buffer shaft sleeve is provided with a first protrusion structure; the buffer shaft inner sleeve is arranged in the shaft sleeve of the impeller body, the buffer shaft sleeve passes through the buffer shaft inner sleeve, and the first protrusion structure of the buffer shaft sleeve drives the impeller body to rotate through the buffer shaft inner sleeve; the buffer elastic member is arranged in the buffer shaft inner sleeve, and the buffer shaft sleeve passes through the buffer elastic member; wherein the shaft sleeve of the impeller body is provided with a first hole shoulder facing the rear end of the impeller body, one end of the buffer elastic member is used to abut against the first hole shoulder, and the other end of the buffer elastic member is used to abut against the first protrusion structure.

[0005] In certain embodiments of the present invention, the impeller includes a buffer shaft sleeve, the buffer shaft sleeve is disposed in the sleeve of the impeller body, the buffer shaft sleeve passes through the buffer shaft sleeve, and the buffer shaft sleeve abuts against the rear end of the buffer shaft inner sleeve.

[0006] In some embodiments of the present invention, the impeller includes a rubber sleeve, the rubber sleeve is disposed in the buffer shaft outer sleeve, and the buffer shaft sleeve passes through the rubber sleeve.

[0007] In certain embodiments of the present invention, the impeller includes a first threaded connector, the first threaded connector is provided with an external thread, the buffer shaft sleeve is provided with an internal thread, the first threaded connector is threadedly connected to the buffer shaft sleeve, and the first threaded connector is used to connect to the rotating shaft.

[0008] In certain embodiments of the present invention, the first threaded connector is provided with a first connecting hole, which penetrates the first threaded connector along the axial direction of the first threaded connector, and the front end of the rotating shaft is installed with the first threaded connector via a second threaded connector penetrating the first connecting hole, and the front end of the rotating shaft is provided with a threaded hole connected to the second threaded connector.

[0009] In certain embodiments of the present invention, the impeller includes a locking ring, the side wall of the locking ring is provided with an axial notch, the axial notch extends from the front end to the rear end of the locking ring, the locking ring has a tapered hole, the tapered hole passes through the locking ring, the large diameter end of the tapered hole is located at the rear end of the locking ring, the front end side wall of the rotating shaft is set as a tapered side wall, the front end of the rotating shaft is plugged into the locking ring, and the outer wall of the locking ring is in contact with the inner wall of the buffer shaft sleeve.

[0010] In certain embodiments of the present invention, the buffer shaft inner sleeve is provided with a clamping hole, and the clamping hole penetrates the buffer shaft inner sleeve along the axial direction of the buffer shaft inner sleeve; when the buffer shaft sleeve rotates, the first protrusion structure of the buffer shaft sleeve abuts against the inner wall of the clamping hole, so that the buffer shaft sleeve is transmission-connected with the buffer shaft inner sleeve.

[0011] In some embodiments of the present invention, a gap is left between the inner wall of the clamping hole and the first protruding structure.

[0012] In certain embodiments of the present invention, a drain groove is provided on the rear side of the tool platform, and two ends of the drain groove extend to the inner wall and the outer wall of the tool platform respectively to form two ports.

[0013] In some embodiments of the present invention, the drain groove is arranged on the rear side of the tool platform along the spiral trajectory of the blade.

[0014] The embodiments of the present invention have at least the following beneficial effects: the buffer elastic member designed in the impeller is sleeved on the buffer shaft sleeve, and the buffer elastic member is used to resist the impeller body, so that the impeller body and the buffer shaft sleeve are elastically connected, and when debris is blocked at the front end of the impeller, the impeller body can retreat to avoid the debris blocking the area between the impeller and the blade table, and prevent the debris from blocking and jamming the impeller. The present invention can be widely used in the field of water pump technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments with reference to the following drawings.

[0016] Figure 1 This is a structural diagram of the impeller, shaft and tool holder.

[0017] Figure 2 This is a structural diagram of the knife table.

[0018] Figure 3 This is a structural diagram of the impeller and shaft.

[0019] Figure 4 for Figure 3 Exploded view of the structure.

[0020] Figure 5 for Figure 3 Cross-sectional view of the structure. DETAILED DESCRIPTION

[0021] Combine the following Figures 1 to 5 Embodiments of the present invention are described in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0022] In the description of the present invention, it should be understood that if the terms "center", "middle", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. The features defined as "first" and "second" are used to distinguish the feature names, rather than having special meanings. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] The present invention relates to a water pump, which comprises an impeller and a pump body, wherein the pump body has a rotating shaft 201, and the rotating shaft 201 is used for transmission connection with the impeller. The impeller comprises an impeller body 100, and the front end of the impeller body 100 has a blade, and the blade has a cutting edge. The pump body drives the impeller body 100 to rotate, and during the rotation of the impeller, the blade's cutting edge can cut debris.

[0025] In conjunction with the accompanying drawings, the water pump includes a cutter table 202, which is arranged at the front end of the water pump. Specifically, the cutter table 202 is located at the front end of the impeller. The middle of the cutter table 202 has a cavity. Debris enters from the cavity in the middle of the cutter table 202, and the rotating impeller cuts the debris.

[0026] In some examples, a drain groove 203 is provided on the rear side of the tool table 202, and the two ends of the drain groove 203 extend to the inner wall and the outer wall of the tool table 202 respectively to form two ports. Specifically, the drain groove 203 extends from the cavity side in the middle of the tool table 202 to the outer side of the tool table 202, so that the debris and chips formed by the impeller cutting can be discharged along the drain groove 203.

[0027] Furthermore, the drain groove 203 is arranged on the rear side of the tool platform 202 along the spiral trajectory of the blade, and the debris chips formed by the impeller cutting can be thrown out along the spiral trajectory of the blade. The drain groove 203 is arranged along the spiral trajectory, so that the debris chips can be easily discharged.

[0028] In conjunction with the accompanying drawings, the middle part of the impeller body 100 has a sleeve, and the sleeve runs through the front end to the rear end of the impeller body 100. The impeller includes a buffer shaft sleeve 101, and the buffer shaft sleeve 101 is inserted into the sleeve of the impeller body 100. A sealing ring 109 is arranged between the front end side wall of the sleeve of the impeller body 100 and the outer wall of the buffer shaft sleeve 101.

[0029] The rotating shaft 201 is inserted into the buffer shaft sleeve 101, and the rotating shaft 201 is in transmission connection with the buffer shaft sleeve 101. Specifically, the rotating shaft 201 is inserted from the rear end of the buffer shaft sleeve 101, and the buffer shaft sleeve 101 drives the impeller body 100 to rotate.

[0030] As an embodiment, the impeller includes a first threaded connector 107, the first threaded connector 107 is provided with an external thread, the buffer shaft sleeve 101 is provided with an internal thread, the first threaded connector 107 is installed from the rear end of the buffer shaft sleeve 101, the first threaded connector 107 is threadedly connected to the buffer shaft sleeve 101, and the first threaded connector 107 is used to connect with the rotating shaft 201. In conjunction with the accompanying drawings, the rear end of the first threaded connector 107 is provided with a head protruding to the side, which is used to abut against the shoulder of the inner wall of the sleeve of the buffer shaft sleeve 101, so that the first threaded connector 107 and the inner wall of the buffer shaft sleeve 101 are threadedly locked.

[0031] The first threaded connector 107 is provided with a first connection hole, which penetrates the first threaded connector 107 along the axial direction of the first threaded connector 107. The front end of the rotating shaft 201 is mounted on the first threaded connector 107 through the second threaded connector 204 which penetrates the first connection hole. The second threaded connector 204 is provided with an external thread, and a threaded hole is provided at the front end of the rotating shaft 201. Specifically, the second threaded connector 204 is provided as a bolt or a screw.

[0032] In conjunction with the accompanying drawings, the second threaded connector 204 passes through the first connecting hole from the front end of the first threaded connector 107, and the second threaded connector 204 is connected to the threaded hole at the front end of the rotating shaft 201. The head of the second threaded connector 204 is against the front end of the first threaded connector 107, and the rotating shaft 201, the first threaded connector 107 and the buffer shaft sleeve 101 are installed by locking the second threaded connector 204.

[0033] Further, the impeller includes a locking ring 108, and the locking ring 108 has a tapered hole. The tapered hole penetrates the locking ring 108 from the front end to the rear end of the locking ring 108, and the large diameter end of the tapered hole is located at the rear end of the locking ring 108. In conjunction with the accompanying drawings, the side wall of the front end of the rotating shaft 201 is set as a tapered side wall, the front end of the rotating shaft 201 is plugged into the locking ring 108, and the outer wall of the locking ring 108 contacts the inner wall of the buffer shaft sleeve 101. Specifically, in the process of locking the second threaded connector 204, the tapered side wall of the front end of the rotating shaft 201 is gradually fixed and pressed against the inner wall of the tapered hole of the locking ring 108, and the locking ring 108 plays a role of fixed connection between the side wall of the front end of the rotating shaft 201 and the inner wall of the sleeve of the buffer shaft sleeve 101.

[0034] Furthermore, the side wall of the locking ring 108 is provided with an axial notch, which extends from the front end to the rear end of the locking ring 108. It is understandable that during the process of tightening the second threaded connector 204, the locking ring 108 is gradually tightened in the circumferential direction, and the axial notch is gradually narrowed, until the second threaded connector 204, the locking ring 108, the front end of the rotating shaft 201, the first threaded connector 107 and the buffer shaft sleeve 101 are fixedly connected.

[0035] In conjunction with the accompanying drawings, the impeller includes a buffer shaft inner sleeve 102, which is disposed in the sleeve of the impeller body 100, and the outer wall of the buffer shaft inner sleeve 102 is interference fit with the inner wall of the sleeve of the impeller body 100, so that the buffer shaft inner sleeve is fixedly connected to the impeller body 100. The buffer shaft sleeve 101 penetrates the buffer shaft inner sleeve 102, and the buffer shaft sleeve 101 realizes transmission connection by clamping the buffer shaft inner sleeve 102 during rotation.

[0036] Specifically, the outer wall of the buffer shaft sleeve 101 is provided with a first protruding structure 104, and the first protruding structure 104 of the buffer shaft sleeve 101 drives the impeller body 100 to rotate through the buffer shaft inner sleeve 102. In conjunction with the drawings, the first protruding structure 104 surrounds the outer wall of the buffer shaft sleeve 101 and is formed into a boss with a corner structure, and the corner structure formed by the first protruding structure 104 is used to abut against the inner wall of the buffer shaft inner sleeve 102.

[0037] It can be understood that the buffer shaft inner sleeve 102 is provided with a clamping hole, which penetrates the buffer shaft inner sleeve 102 along the axial direction of the buffer shaft inner sleeve 102. When the buffer shaft sleeve 101 rotates, the first protruding structure 104 of the buffer shaft sleeve 101 abuts against the inner wall of the clamping hole, so that the buffer shaft sleeve 101 is transmission-connected with the buffer shaft inner sleeve 102. Specifically, a corner structure is formed on the inner wall of the clamping hole, and the corner structure formed by the first protruding structure 104 is clamped with the corner structure of the clamping hole, thereby realizing the transmission of the buffer shaft sleeve 101 and the buffer shaft inner sleeve 102.

[0038] In conjunction with the drawings, the first protruding structure 104 is configured to be in a rectangular shape, and the corner structure formed by the first protruding structure 104 is configured to be a rounded structure with an arc surface transition.

[0039] Furthermore, a gap is designed between the inner wall of the hole and the first protruding structure 104 so that there is a movable space between the outer wall of the first protruding structure 104 and the inner wall of the buffer shaft inner sleeve 102. When debris is stuck between the tool holder 202 and the impeller, the impeller can move to avoid being stuck.

[0040] In order to improve the impact resistance of the impeller and the water pump, avoid clogging and jamming of the impeller by debris, avoid structural damage to the water pump and the impeller, and improve the cutting effect, the impeller is designed to include a buffer elastic part 103, the buffer elastic part 103 is arranged in the buffer shaft inner sleeve 102, the buffer shaft sleeve 101 passes through the buffer elastic part 103, and the buffer elastic part 103 has compression deformation capability. Specifically, the buffer elastic part 103 is arranged as a compression spring.

[0041] It can be understood that when debris blocks the space between the impeller and the blade 202, the debris pushes against the impeller, and the impeller can move toward the rear end along the rotating shaft 201. After the debris is cleaned or shredded, under the elastic action of the buffer elastic member 103, the impeller can move toward the front end along the rotating shaft 201 and reset.

[0042] In conjunction with the accompanying drawings, the shaft sleeve of the impeller body 100 is provided with a first hole shoulder facing the rear end of the impeller body 100, and the buffer elastic member 103 is located in an annular cavity formed by the first hole shoulder, the front end side of the first protruding structure 104, the inner side of the buffer shaft inner sleeve 102 and the outer side of the buffer shaft sleeve 101. When the debris moves backward against the impeller, the buffer elastic member 103 is compressed, and one end of the buffer elastic member 103 is used to resist the first hole shoulder, and the other end of the buffer elastic member 103 is used to resist the first protruding structure 104, thereby realizing an elastic connection between the impeller and the rotating shaft 201.

[0043] When the impeller is squeezed and moved backward by debris, the buffer shaft sleeve 101 remains axially fixed on the rotating shaft 201 so that the front end side surface of the first protruding structure 104 on the buffer shaft sleeve 101 can provide support for the buffer elastic member 103 .

[0044] Further, the impeller includes a buffer shaft sleeve 105, which is arranged in the sleeve of the impeller body 100. The outer side of the buffer shaft sleeve 105 is interference-fitted with the inner side of the sleeve of the impeller body 100, so that the buffer shaft sleeve 105 is fixedly connected to the impeller body 100, and the buffer shaft sleeve 101 passes through the buffer shaft sleeve 105. In conjunction with the accompanying drawings, the inner side of the sleeve of the impeller body 100 is formed with a third hole shoulder near the rear end, and the buffer shaft sleeve 105 is located in the area formed by the third hole shoulder in the sleeve of the impeller body 100. The buffer shaft sleeve 105 abuts against the rear end of the buffer shaft inner sleeve 102 to prevent the buffer shaft inner sleeve 102 from coming out of the impeller body 100, thereby improving the stability of the impeller structure assembly.

[0045] In conjunction with the accompanying drawings, the impeller includes a rubber sleeve 106, which is arranged in the buffer shaft sleeve 105. The buffer shaft sleeve 101 passes through the rubber sleeve 106. The rubber sleeve 106 fills the gap between the buffer shaft sleeve 105 and the buffer shaft sleeve 101 to improve the stability of the impeller structure.

[0046] In the description of this specification, if the reference terms "one embodiment", "some examples", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples" appear, it means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0047] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

[0048] In the description of the invention, if the patent name contains "、", it indicates an "and" relationship, not an "or" relationship. For example, if the patent name is "A, B", it means that the content of the invention is: the technical solution with the subject name A and the technical solution with the subject name B.

Claims

1. A water pump, characterized in that: The pump comprises an impeller, a pump body and a blade platform (202), wherein the blade platform (202) is located at the front end of the impeller, the pump body has a rotating shaft (201), and the impeller comprises An impeller body (100), wherein the front end of the impeller body (100) has a blade, and the blade has a cutting edge; a buffer shaft sleeve (101), the buffer shaft sleeve (101) being inserted into the shaft sleeve of the impeller body (100), the rotating shaft (201) being inserted into the buffer shaft sleeve (101), the rotating shaft (201) being transmission-connected to the buffer shaft sleeve (101), and the outer side wall of the buffer shaft sleeve (101) being provided with a first protruding structure (104); a buffer shaft inner sleeve (102), the buffer shaft inner sleeve (102) being arranged in the shaft sleeve of the impeller body (100), the buffer shaft sleeve (101) penetrating the buffer shaft inner sleeve (102), and the first protruding structure (104) of the buffer shaft sleeve (101) driving the impeller body (100) to rotate via the buffer shaft inner sleeve (102); a buffer elastic member (103), the buffer elastic member (103) being arranged in the buffer shaft inner sleeve (102), the buffer shaft sleeve (101) penetrating the buffer elastic member (103); the shaft sleeve of the impeller body (100) being provided with a first hole shoulder facing the rear end of the impeller body (100), one end of the buffer elastic member (103) being used to abut against the first hole shoulder, and the other end of the buffer elastic member (103) being used to abut against the first protruding structure (104); A first threaded connector (107), wherein the first threaded connector (107) is provided with an external thread, and the buffer shaft sleeve (101) is provided with an internal thread. The first threaded connector (107) is threadedly connected to the buffer shaft sleeve (101). The first threaded connector (107) is provided with a first connecting hole, and the first connecting hole penetrates the first threaded connector (107) along the axial direction of the first threaded connector (107). The front end of the rotating shaft (201) is mounted with the first threaded connector (107) through a second threaded connector (204) penetrating the first connecting hole. The front end of the rotating shaft (201) is provided with a threaded hole connected to the second threaded connector (204); The locking ring (108) has a side wall provided with an axial notch, the axial notch extending from the front end to the rear end of the locking ring (108), the locking ring (108) having a tapered hole, the tapered hole passing through the locking ring (108), the large diameter end of the tapered hole being located at the rear end of the locking ring (108), the front end side wall of the rotating shaft (201) being arranged as a tapered side wall, the front end of the rotating shaft (201) being in contact with the locking ring The ring (108) is inserted, and the outer wall of the locking ring (108) contacts the inner wall of the buffer shaft sleeve (101); during the process of tightening the second threaded connector (204), the locking ring (108) is gradually tightened in the circumferential direction, and the axial notch is gradually narrowed until the second threaded connector (204), the locking ring (108), the front end of the rotating shaft (201), the first threaded connector (107) and the buffer shaft sleeve (101) are fixedly connected; The buffer shaft inner sleeve (102) is provided with a latching hole, and the latching hole penetrates the buffer shaft inner sleeve (102) along the axial direction of the buffer shaft inner sleeve (102); when the buffer shaft sleeve (101) rotates, the first protruding structure (104) of the buffer shaft sleeve (101) abuts against the inner wall of the latching hole, so that the buffer shaft sleeve (101) and the buffer shaft inner sleeve (102) are transmission-connected; a gap is left between the inner wall of the latching hole and the first protruding structure (104), so that there is a movable space between the outer wall of the first protruding structure (104) and the inner wall of the buffer shaft inner sleeve (102).

2. The water pump according to claim 1, characterized in that: The impeller comprises a buffer shaft outer sleeve (105), the buffer shaft outer sleeve (105) is arranged in the shaft sleeve of the impeller body (100), the buffer shaft sleeve (101) passes through the buffer shaft outer sleeve (105), and the buffer shaft outer sleeve (105) abuts against the rear end of the buffer shaft inner sleeve (102).

3. The water pump according to claim 2, characterized in that: The impeller comprises a rubber sleeve (106), the rubber sleeve (106) is arranged in the buffer shaft outer sleeve (105), and the buffer shaft sleeve (101) passes through the rubber sleeve (106).

4. The water pump according to claim 1, characterized in that: A drainage groove (203) is provided on the rear side of the tool platform (202), and two ends of the drainage groove (203) respectively extend to the inner wall and the outer wall of the tool platform (202) to form two ports.

5. The water pump according to claim 4, characterized in that: The drainage trough (203) is arranged on the rear side of the blade platform (202) along the spiral trajectory of the blade.

6. The water pump according to claim 1, characterized in that: The rear end of the first threaded connector (107) is provided with a head protruding toward the side, which is used to abut against the shoulder of the inner wall of the sleeve of the buffer shaft sleeve (101) so that the first threaded connector (107) and the inner wall of the buffer shaft sleeve (101) are thread-locked.

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