Connecting shaft for self-priming pump

Abstract

The self-priming pump comprises a pump body, a motor and the connecting shaft, the connecting shaft is of a work cylinder structure, a motor coupler is arranged on one side of the connecting shaft, a clamping groove is formed in the motor coupler, a circular groove is formed in the side, close to the connecting shaft, of the motor coupler, a star-shaped connector is fixedly installed in the circular groove, and the star-shaped connector is fixedly connected with the motor coupler. An elastic through hole is formed in the side, close to the motor, of the connecting shaft, one end of the screw extends out of the elastic through hole and then abuts against the outer side of the star-shaped connector, and the motor coupler is slidably installed on the connecting shaft through the screw. Due to the fact that the marine self-priming pump is usually large and the distance between the motor and the self-priming pump is long, the rhombic elastic piece is adopted, the motor is elastically connected with an impeller of the self-priming pump, and when stress occurs, the elastic piece can be used for buffering; the star-shaped connector solves the problem that when a motor is started, stress is large due to the fact that an impeller needs to be driven, and a rhombus cannot overcome the stress, a screw slides on the star-shaped connector, and the stress can be effectively overcome.

Description

Technical Field

[0001] This utility model relates to the field of self-priming pump technology, specifically a connecting shaft for a self-priming pump. Background Technology

[0002] Self-priming pumps are a type of self-priming centrifugal pump. They have advantages such as compact structure, convenient operation, stable operation, easy maintenance, high efficiency, long service life, and strong self-priming ability. No foot valve needs to be installed in the pipeline. Before operation, it is only necessary to ensure that the pump body contains a certain amount of priming liquid. Different materials can be used for self-priming pumps for different liquids. However, during the use of self-priming pumps, the connecting shaft often needs to withstand great stress because the motor drives the impeller to rotate at high speed. Especially when the motor starts, long-term use may cause the connecting shaft to break due to stress. Therefore, this invention relates to a connecting shaft with a sliding connection method to solve the stress problem. Utility Model Content

[0003] The purpose of this utility model is to provide a connecting shaft for a self-priming pump, so as to solve the problem mentioned in the background art that the connecting shaft is deformed or even broken due to stress problems during the use of the self-priming pump.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a connecting shaft for a self-priming pump, the self-priming pump including a pump body, a motor, and a connecting shaft, the connecting shaft adopting an ICBC cylindrical structure, a motor coupling provided on one side, a slot provided inside the motor coupling, a circular groove provided on the side of the motor coupling near the connecting shaft, a star connector fixedly installed in the circular groove, an elastic through hole provided on the side of the connecting shaft near the motor, one end of a screw extending out of the elastic through hole and abutting against the outside of the star connector, the motor coupling being slidably mounted on the connecting shaft via the screw;

[0005] An impeller coupling is provided on the other side of the connecting shaft. The impeller coupling has a groove inside and a screw groove on the side near the connecting shaft. A diamond-shaped elastic plate is provided inside the screw groove. A connecting hole is provided on the side of the connecting shaft near the impeller coupling. One end of the screw passes through the connecting hole and is inserted into the diamond-shaped elastic plate. The impeller coupling is slidably mounted on the connecting shaft by the screw.

[0006] Furthermore, the screw groove adopts a cylindrical structure with circular openings on the upper and lower sides.

[0007] Furthermore, the elastic through hole is made of rubber and is fixedly installed on the connecting shaft. A protrusion is provided at the center of the circular groove, and the star connector is fixedly installed on the protrusion. The star connector is concentrically arranged with the motor coupling.

[0008] Furthermore, the rhomboid elastic sheet is made of elastic steel sheet, and a triangular prism and a fixing rod are installed in the screw groove. The triangular prism is fixedly installed on the upper and lower diagonally inner sides of the rhomboid elastic sheet, and the two fixing rods are installed on the upper diagonally outer left and right sides of the rhomboid elastic sheet, and the two fixing rods are installed on the lower diagonally outer left and right sides of the rhomboid elastic sheet.

[0009] Furthermore, the motor shaft is fixedly installed in the internal slot of the motor coupling, and the impeller shaft is fixedly installed in the internal slot of the impeller coupling.

[0010] Furthermore, the screw has a nut at the top and a limiting ball at the bottom. The diameter of the limiting ball is larger than the distance between the two obtuse angles of the rhomboid elastic sheet and smaller than the distance between the two acute angles of the rhomboid elastic sheet.

[0011] Furthermore, the diameter of the circular opening is smaller than the distance between the two acute angles of the rhomboid elastic sheet, but larger than the diameter of the limiting ball.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. This utility model connects the motor and the self-priming pump through a diamond-shaped elastic sheet. Since marine self-priming pumps are often large and the distance between the motor and the self-priming pump is far, the connecting shaft of the self-priming pump is long, resulting in a large stress problem. Therefore, a diamond-shaped elastic sheet is used to make the motor and the impeller of the self-priming pump elastically connected. When stress occurs, it can be buffered by the elastic sheet.

[0014] 2. By setting up a star connector, the stress caused by the need to drive the impeller during motor startup can be effectively overcome when the rhomboid joint cannot overcome the stress. The screw slides on the star connector, which can effectively overcome the stress. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the self-priming pump coupling of this utility model.

[0018] Figure 3 This is a diagram showing the positions of the star connector and screw of this utility model;

[0019] Figure 4 This is a schematic diagram of the connecting shaft of this utility model.

[0020] The attached diagram lists the components represented by each number as follows:

[0021] 1. Motor, 2. Connecting shaft, 3. Pump body, 4. Motor coupling, 5. Impeller coupling, 6. Flexible through hole, 7. Screw, 8. Rhomboid elastic plate, 9. Fixing rod, 10. Triangular prism, 11. Screw groove, 12. Star connector, 13. Protrusion. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-2 This utility model provides a technical solution: a connecting shaft for a self-priming pump. The self-priming pump includes a pump body 3, a motor 1, and a connecting shaft 2. The connecting shaft 2 adopts an ICBC cylindrical structure, and a motor coupling 4 is provided on one side. The motor coupling 4 has a slot inside, and a circular groove is provided on the side of the motor coupling 4 near the connecting shaft 2. A star connector 12 is fixedly installed in the circular groove. The connecting shaft 2 has an elastic through hole 6 on the side near the motor 1. One end of a screw 7 extends out of the elastic through hole 6 and is close to the outside of the star connector 12. The motor coupling 4 is slidably installed on the connecting shaft 2 through the screw 7.

[0024] An impeller coupling 5 is provided on the other side of the connecting shaft 2. The impeller coupling 5 has a groove inside and a screw groove 11 is provided on the side near the connecting shaft 2. A diamond-shaped elastic plate 8 is provided inside the screw groove 11. A connecting hole is provided on the side of the connecting shaft 2 near the impeller coupling 5. One end of the screw 7 passes through the connecting hole and is inserted into the diamond-shaped elastic plate 8. The impeller coupling 5 is slidably mounted on the connecting shaft 2 through the screw 7.

[0025] The screw groove has a cylindrical structure with circular openings on the top and bottom sides.

[0026] The elastic through hole 6 is made of rubber and is fixedly installed on the connecting shaft 2. A protrusion 13 is provided at the center of the circular groove, and the star connector 12 is fixedly installed on the protrusion 13. The star connector 12 is concentrically arranged with the motor coupling 4.

[0027] The rhomboid elastic sheet 8 is made of elastic steel sheet. The screw groove 11 is equipped with a triangular prism 10 and a fixing rod 9. The triangular prism 10 is fixedly installed on the upper and lower diagonally inner sides of the rhomboid elastic sheet 8. The two fixing rods 9 are installed on the upper diagonally outer left and right sides of the rhomboid elastic sheet 8, and the two fixing rods 9 are installed on the lower diagonally outer left and right sides of the rhomboid elastic sheet 8.

[0028] The motor shaft is fixedly installed in the internal slot of the motor coupling 4, and the impeller shaft is fixedly installed in the internal slot of the impeller coupling 5.

[0029] The screw 7 has a nut at the top and a limiting ball at the bottom. The diameter of the limiting ball is larger than the distance between the two obtuse angles of the rhomboid elastic sheet 8 and smaller than the distance between the two acute angles of the rhomboid elastic sheet.

[0030] The diameter of the circular opening is smaller than the distance between the two acute angles of the rhomboid elastic sheet, but larger than the diameter of the limiting ball.

[0031] When it is working, the motor starts and the motor shaft drives the motor coupling 4 to rotate. Due to the stress, the screw 7 squeezes the diamond-shaped elastic plate 8, causing it to deform, which drives the connecting shaft 2 to rotate and then drives the impeller to rotate. After the diamond-shaped elastic plate 8 is deformed, it will not be displaced under the action of the fixed rod 9 and the triangular column 10. At this time, under the action of the elastic through hole, the screw slides on the star connector 12, thereby offsetting the stress. At this time, the motor drives the impeller to start slowly until the impeller speed is the same as the motor shaft speed.

[0032] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0033] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A connecting shaft for a self-priming pump, the self-priming pump comprising a pump body, a motor, and a connecting shaft, characterized in that: The connecting shaft adopts an ICBC cylindrical structure, with a motor coupling on one side. The motor coupling has a slot inside and a circular groove on the side of the motor coupling near the connecting shaft. A star connector is fixedly installed in the circular groove. The connecting shaft has an elastic through hole on the side near the motor. One end of the screw extends out of the elastic through hole and abuts against the outside of the star connector. The motor coupling is slidably installed on the connecting shaft through the screw. An impeller coupling is provided on the other side of the connecting shaft. The impeller coupling has a groove inside and a screw groove on the side near the connecting shaft. A diamond-shaped elastic plate is provided inside the screw groove. A connecting hole is provided on the side of the connecting shaft near the impeller coupling. One end of the screw passes through the connecting hole and is inserted into the diamond-shaped elastic plate. The impeller coupling is slidably mounted on the connecting shaft by the screw.

2. The connecting shaft for a self-priming pump according to claim 1, characterized in that: The screw groove has a cylindrical structure with circular openings on the top and bottom sides.

3. A connecting shaft for a self-priming pump according to claim 1, characterized in that: The elastic through hole is made of rubber and is fixedly installed on the connecting shaft. A protrusion is provided at the center of the circular groove, and the star connector is fixedly installed on the protrusion. The star connector is concentrically arranged with the motor coupling.

4. A connecting shaft for a self-priming pump according to claim 1, characterized in that: The rhomboid elastic sheet is made of elastic steel sheet. A triangular prism and a fixing rod are installed in the screw groove. The triangular prism is fixedly installed on the upper and lower diagonally inner sides of the rhomboid elastic sheet. The two fixing rods are installed on the upper diagonally outer left and right sides of the rhomboid elastic sheet. The two fixing rods are installed on the lower diagonally outer left and right sides of the rhomboid elastic sheet.

5. A connecting shaft for a self-priming pump according to claim 1, characterized in that: The motor shaft is fixedly installed in the internal slot of the motor coupling, and the impeller shaft is fixedly installed in the internal slot of the impeller coupling.

6. A connecting shaft for a self-priming pump according to claim 1, characterized in that: The screw has a nut at the top and a limiting ball at the bottom. The diameter of the limiting ball is larger than the distance between the two obtuse angles of the rhomboid elastic sheet and smaller than the distance between the two acute angles of the rhomboid elastic sheet.

7. A connecting shaft for a self-priming pump according to claim 2, characterized in that: The diameter of the circular opening is smaller than the distance between the two acute angles of the rhomboid elastic sheet, but larger than the diameter of the limiting ball.

Images