Self-tightening impeller locking nut

Abstract

The utility model discloses a kind of self-tight impeller locking nuts, including nut body, the outer surface of nut is provided with the arc groove same as the rotating direction of impeller, the arc groove is distributed with multiple around circumference, locking nut rotates together when impeller works, liquid is dragged into impeller blade along arc groove along with impeller import, simultaneously due to the interaction of force, locking nut is subjected to force in opposite direction (same nut locking direction), so that locking nut is locked by itself, effectively prevent the phenomenon that locking nut is loose.

Description

Technical Field

[0001] This utility model relates to the field of impeller installation, and in particular to a self-tightening impeller locking nut. Background Technology

[0002] The impeller is a core component of a water pump. It is mainly mounted on the shaft of the pump motor and driven to rotate. The firmness of its installation directly affects the normal operation and performance of the pump. Currently, the impeller is usually fixed to the motor shaft with screws. If screws are used, holes need to be drilled at the shaft, which can easily affect the strength of the shaft. Moreover, the tightening force depends on the size of the screw, which is limited by the shaft diameter. Therefore, the tightening force of this structure is relatively small, and there is a risk of loosening.

[0003] Currently, some pumps use hexagonal nuts to lock the impeller in place. However, during pump operation, the water flow impacts the surface of the hexagonal nut, and the nut is also prone to loosening due to stress. This method needs further improvement. Utility Model Content

[0004] To further reduce the risk of loosening, this application provides a self-tightening impeller locking nut.

[0005] This application provides a self-tightening impeller locking nut, which adopts the following technical solution:

[0006] A self-tightening impeller locking nut includes a nut body, the outer surface of which is provided with an arc groove in the same direction as the impeller rotation, and multiple arc grooves are distributed around the circumference.

[0007] Optionally, the nut body is frustoconical in shape.

[0008] Optionally, the top of the nut body is a round head.

[0009] Optionally, one end of the arc groove penetrates the end wall of the nut body, and the other end extends to the outer wall of the round head.

[0010] Optionally, one end of the nut body is provided with a threaded hole for threaded connection with the shaft head, and the other end face is provided with an operating groove.

[0011] Optionally, the operating slot is an internal hexagonal slot.

[0012] Optionally, six arc grooves are evenly distributed around the circumference of the nut body.

[0013] Optionally, the depth direction of the arc groove is inclined to the radial direction of the nut body.

[0014] Optionally, the width of the arc groove gradually decreases along its depth direction.

[0015] Optionally, the end of the nut body away from the threaded hole has a flat surface, and the operating groove is formed on the flat surface.

[0016] In summary, this application includes at least one of the following beneficial technical effects:

[0017] 1. When the impeller is working, the locking nut rotates together with it. The liquid at the impeller inlet is drawn into the impeller blades along the arc groove. At the same time, due to the interaction of forces, the locking nut is subjected to a force in the opposite direction (the same as the locking direction of the nut), which causes the locking nut to lock itself, effectively preventing the locking nut from loosening.

[0018] 2. The nut body adopts a truncated cone structure, which has good flow and flow guidance capabilities, and avoids the disadvantage of traditional hexagonal surfaces being easily loosened by liquid flow impact;

[0019] 3. No threaded holes need to be tapped on the drive shaft, so the drive shaft has high strength;

[0020] 4. Larger thread specifications can be used to provide greater locking force;

[0021] 5. The arc groove extends to the round head, which can play a good role in guiding the flow. The operation groove is designed to facilitate manual tightening of the locking nut for installation. This not only facilitates installation but also avoids the disadvantage of traditional hexagonal surfaces being easily loosened by liquid flow impact. Attached Figure Description

[0022] Figure 1 This is a structural diagram from a first-view perspective of an embodiment of this application.

[0023] Figure 2 This is a structural diagram from a second perspective of an embodiment of this application.

[0024] Figure 3 This is a cross-sectional view of an embodiment of this application.

[0025] Figure 4 This is an end view of an embodiment of this application.

[0026] Figure 5 This is a cross-sectional view of the embodiment of this application during installation and use.

[0027] Figure 6 This is an end view of the embodiment of this application during installation and use.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. Nut body; 2. Threaded hole; 3. Round head; 4. Operating groove; 5. Flat surface; 6. Arc groove; 7. Shaft head; 8. Impeller. Detailed Implementation

[0030] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0031] A self-tightening impeller locking nut, such as Figures 1-2 As shown, the nut body 1 is shaped like a frustum, meaning its outer diameter gradually decreases from one end to the other. The outer wall of the nut body 1 is a smooth arc surface. A threaded hole 2 is provided on the end face of the nut body 1 at its larger diameter end, for threaded connection with the motor shaft 7. The smaller diameter end of the nut body 1 is a round head 3, the outer wall of which is a hemispherical surface. The top of the round head 3 has a flat plane 5, on which an operating groove 4 is provided. The design of the operating groove 4 allows for easy rotation of the nut body 1 using a wrench to achieve locking and installation. In this embodiment, the operating groove 4 is an internal hexagonal groove, allowing for disassembly and assembly using a hexagonal wrench. The design of the plane 5 facilitates the machining of the operating groove 4.

[0032] In this way, the outer surface of the nut body 1 adopts a truncated cone structure, which has good flow and flow guidance capabilities, and avoids the disadvantage of traditional hexagonal surfaces being easily loosened by liquid flow impact.

[0033] like Figure 3 As shown, both the threaded hole 2 and the operating hole are blind holes and do not penetrate the nut body 1, so there will be no interference between them.

[0034] like Figures 1-4 As shown, an arc groove 6 with the same rotation direction as the impeller 8 is provided on the outer wall of the nut body 1. Multiple arc grooves 6 are evenly distributed around the circumference. In this embodiment, six arc grooves 6 are evenly distributed around the circumference of the nut body 1.

[0035] like Figure 5 and Figure 6 As shown, when the impeller 8 is working, the locking nut rotates together with it. The liquid inlet of the impeller 8 is drawn into the blades of the impeller 8 along the arc groove 6. At the same time, due to the interaction of forces, the locking nut is subjected to a force in the opposite direction (the same as the locking direction of the nut), which causes the locking nut to lock itself, effectively preventing the locking nut from loosening. In this embodiment, the rotation direction of the impeller 8 is opposite to the tightening direction of the locking nut.

[0036] like Figures 1-4 As shown, one end of the arc groove 6 extends to the outer wall of the round head 3, and the other end penetrates the end face of the nut body 1 away from the round head 3. This design allows the arc groove 6 located at one end of the round head 3 to effectively guide the liquid inlet of the impeller 8, so that the liquid can smoothly enter the arc groove 6 and eventually be discharged from the other end.

[0037] like Figure 1 and Figure 4As shown, the depth direction of the arc groove 6 is inclined to the radial direction of the nut body 1. This allows the liquid to better exert a reaction force on the nut body 1 after entering the arc groove 6, thereby driving the nut body 1 to tighten. Furthermore, the width of the arc groove 6 gradually decreases along its depth direction, so the liquid pressure at the bottom of the arc groove 6 in the depth direction is greater, which can better drive the nut body 1 to rotate and lock.

[0038] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A self-tightening impeller locking nut, characterized in that: Includes a nut body (1), the outer surface of which is provided with an arc groove (6) in the same direction of rotation as the impeller (8), and multiple arc grooves (6) are distributed around the circumference.

2. The self-tightening impeller locking nut according to claim 1, characterized in that: The nut body (1) is frustoconical in shape.

3. A self-tightening impeller locking nut according to claim 1 or 2, characterized in that: The top of the nut body (1) is a round head (3).

4. A self-tightening impeller locking nut according to claim 3, characterized in that: One end of the arc groove (6) penetrates the end wall of the nut body (1), and the other end extends to the outer wall of the round head (3).

5. A self-tightening impeller locking nut according to claim 1, characterized in that: One end of the nut body (1) is provided with a threaded hole (2) for threaded connection with the shaft head (7), and the other end is provided with an operating groove (4).

6. A self-tightening impeller locking nut according to claim 5, characterized in that: The operating slot (4) is an internal hexagonal slot.

7. A self-tightening impeller locking nut according to claim 1, characterized in that: The arc grooves (6) are evenly distributed in six places around the circumference of the nut body (1).

8. A self-tightening impeller locking nut according to claim 1, characterized in that: The depth direction of the arc groove (6) is inclined to the radial direction of the nut body (1).

9. A self-tightening impeller locking nut according to claim 1, characterized in that: The width of the arc groove (6) gradually decreases along its depth direction.

10. A self-tightening impeller locking nut according to claim 5, characterized in that: The nut body (1) has a flat surface (5) at one end away from the threaded hole (2), and the operating groove (4) is formed on the flat surface (5).

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