Motor output structure for pump

Abstract

The utility model provides a motor output structure for a pump, and belongs to the technical field of water pumps. The problem that an existing motor affects the operation stability of a water pump is solved. According to the motor output structure for the pump, a motor comprises a machine shell and a power end cover fixed to the front end of the machine shell, an installation cavity is formed between the power end cover and the machine shell, a fan is arranged in the installation cavity, a crankshaft is arranged in the machine shell, the front end of the crankshaft extends into the installation cavity and is connected with the fan, the output structure comprises an output shaft, and the rear end of the output shaft extends into the installation cavity. An annular connecting base is formed on the outer wall of the rear end of the output shaft, located on the front side of the fan and directly and fixedly connected with the fan. The motor output structure for the pump can enhance the operation stability of the water pump.

Description

Technical Field

[0001] The utility model belongs to the technical field of water pumps and relates to a pump motor, in particular to an output structure of a pump motor. Background Art

[0002] Pump motors, especially water pump motors, are motors designed specifically for pump loads. They have unique technical characteristics and a wide range of applications.

[0003] A certain type of existing pump motor consists of a coaxially arranged crankshaft and output shaft. A fan is fixedly connected to the front end of the crankshaft, and the fan is connected to the output shaft via a centrifugal block structure. This structure was originally designed to enable the motor to drive the pump impeller at high speeds even when the pump is running. However, this structure not only complicates the structure but also affects the coaxiality of the crankshaft and output shaft, thereby affecting the smoothness and efficiency of the pump's operation. Utility Model Content

[0004] The purpose of the utility model is to address the above-mentioned problems in the existing technology and to propose a pump motor output structure that can enhance the running stability and efficiency of the water pump.

[0005] The purpose of the utility model can be achieved through the following technical solutions: a pump motor output structure, the motor includes a casing and a power end cover fixed to the front end of the casing, and a mounting cavity is formed between the power end cover and the casing, a fan is provided in the mounting cavity, a crankshaft is provided in the casing, the front end of the crankshaft extends into the mounting cavity and is connected to the fan, the output structure includes an output shaft, and the rear end of the output shaft extends into the mounting cavity, and is characterized in that an annular connecting seat is formed on the outer wall of the rear end of the output shaft, and the connecting seat is coaxially arranged with the output shaft; the connecting seat is located in the front side of the fan and the two are directly fixedly connected.

[0006] This application removes the centrifugal block structure of the prior art and connects the crankshaft directly to the output shaft through the fan. This not only makes the power output more direct, but also effectively enhances the rotational coaxiality of the crankshaft and the output shaft, making the water pump run more smoothly and efficiently.

[0007] In the aforementioned pump motor output structure, the fan front has a concave cavity coaxial with the fan, and the rear side of the connector has a guide ring that mates with the cavity and is inserted into the cavity. The combination of the concave cavity and the guide ring further enhances the coaxiality of the crankshaft and output shaft, further improving the efficiency and stability of the water pump.

[0008] In the above-mentioned pump motor output structure, the connecting seat is pressed against the fan and the two are fixedly connected by a circle of bolts, and the axis of the bolts extends forward and backward, which has the advantages of simple structure and easy installation.

[0009] In the aforementioned pump motor output structure, the connector and fan are each axially penetrated by a through hole and a threaded hole. The through holes, threaded holes, and bolts are identical in number. The bolt shanks pass through the corresponding through holes and screw into the corresponding threaded holes, with the bolt heads pressing against the front side of the connector. This forward placement of the bolt heads facilitates installation.

[0010] In the aforementioned pump motor output structure, ribs are formed on the rear side of the fan. These ribs extend radially along the fan's length. There are an equal number of ribs and threaded holes, and the tip of each threaded hole extends to the corresponding rib. The ribs strengthen the connection between the fan and the connector, making the overall connection more stable.

[0011] In the above-mentioned pump motor output structure, a connecting hole is axially penetrated on the bottom wall of the cavity, and the front end of the crankshaft extends into the cavity through the connecting hole to facilitate the connection between the fan and the crankshaft.

[0012] Compared with the existing technology, the pump motor output structure has the following advantages:

[0013] 1. This application removes the centrifugal coupling structure of the prior art and connects the crankshaft directly to the output shaft through the fan. This not only makes the power output more direct, but also effectively enhances the rotational coaxiality of the crankshaft and the output shaft, making the water pump run more smoothly and efficiently.

[0014] 2. With the cooperation of the concave cavity and the guide ring, the coaxiality of the crankshaft and the output shaft can be further strengthened, and the operating efficiency and stability of the water pump can be further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional schematic diagram of the output structure of the pump motor.

[0016] Figure 2 It is a cross-sectional schematic diagram of the pump motor output structure.

[0017] Figure 3 This is a connection diagram between the connector and the fan.

[0018] In the figure, 1. casing; 2. power end cover; 3. mounting cavity; 4. fan; 4a. concave cavity; 4b. rib; 5. crankshaft; 6. output shaft; 6a. connecting seat; 6b. guide ring; 7. bolt; 8. pressure cap; 9. gasket. DETAILED DESCRIPTION

[0019] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0020] like Figure 1 and Figure 2As shown, in the pump motor output structure, the motor includes a housing 1 and a power end cover 2 fixed to the front end of the housing 1. A mounting cavity 3 is formed between the power end cover 2 and the housing 1, and in actual products, the mounting cavity 3 is open and connected to the outside.

[0021] Specifically,

[0022] A centrifugal fan 4 is installed within the mounting cavity 3. A crankshaft 5 is installed within the housing 1. The front end of the crankshaft 5 extends into the mounting cavity 3 and connects to the fan 4. The output structure includes an output shaft 6 located in front of the power end cover 2. The output shaft 6, fan 4, and crankshaft 5 are coaxially arranged, with the rear end of the output shaft 6 extending into the mounting cavity 3. An annular connecting seat 6a is formed on the rear end outer wall of the output shaft 6 and is coaxial with the output shaft 6. The connecting seat 6a is located in front of the fan 4 and is directly connected to the fan 4.

[0023] This application removes the centrifugal block structure of the prior art and connects the crankshaft 5 directly to the output shaft 6 through the fan 4. This not only makes the power output more direct, but also effectively enhances the rotational coaxiality of the crankshaft 5 and the output shaft 6, making the water pump run more smoothly and efficiently.

[0024] To further illustrate, the front side of fan 4 has a concave cavity 4a coaxial with the fan 4. A guide ring 6b is formed on the rear side of connector 6a to match concave cavity 4a and is inserted into concave cavity 4a. The combination of concave cavity 4a and guide ring 6b further enhances the coaxiality of crankshaft 5 and output shaft 6, further improving the efficiency and stability of the water pump.

[0025] In this embodiment,

[0026] The output shaft 6, the connecting seat 6a and the guide ring 6b are an integrated structure, and preferably the three are integrally formed by casting.

[0027] like Figure 2 and Figure 3 As shown, the connection between the connector 6a and the fan 4 is as follows: the connector 6a presses against the fan 4 and the two are fixedly connected by a ring of bolts 7, with the bolts 7 extending forward and backward along their axes. This provides advantages such as a simple structure and easy installation. Specifically, the connector 6a and the fan 4 are each axially penetrated by through holes and threaded holes. The through holes, threaded holes, and bolts 7 are of equal number. The shanks of the bolts 7 pass through the corresponding through holes and screw into the corresponding threaded holes, with the heads of the bolts 7 pressing against the front side of the connector 6a. The forward placement of the bolt heads facilitates installation.

[0028] Furthermore, ribs 4b are formed on the rear side of the fan 4. These ribs 4b extend radially along the fan 4. There are as many ribs 4b as threaded holes, and the front end of each threaded hole extends to the corresponding rib 4b. The provision of these ribs 4b strengthens the connection between the fan 4 and the connector 6a, making the overall connection more stable.

[0029] The fan 4 and crankshaft 5 are connected as follows: a connecting hole is axially penetrated through the bottom wall of the concave cavity 4a, through which the front end of the crankshaft 5 extends into the concave cavity 4a, facilitating connection between the fan 4 and the crankshaft 5. The connecting hole is a tapered hole with a diameter that gradually increases from front to back, and the outer wall of the crankshaft 5 and the inner wall of the tapered hole are in contact with each other through a tapered surface. A pressure cap 8 and a gasket 9 are screwed onto the front end of the crankshaft 5, with the ends of the gasket 9 pressing tightly against the bottom surface of the concave cavity 4a and the pressure cap 8, respectively. Furthermore, a keyway is axially penetrated through the inner wall of the tapered hole, and a key block is fixed to the crankshaft 5 to match the keyway. The key block is inserted into the keyway, ensuring a stable circumferential fit between the crankshaft 5 and the fan 4.

[0030] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

Claims

1. A pump motor output structure, the motor comprising a housing (1) and a power end cover (2) fixed to the front end of the housing (1), and a mounting cavity (3) is formed between the power end cover (2) and the housing (1), a fan (4) is provided in the mounting cavity (3), a crankshaft (5) is provided in the housing (1), the front end of the crankshaft (5) extends into the mounting cavity (3) and is connected to the fan (4), the output structure comprises an output shaft (6), and the rear end of the output shaft (6) extends into the mounting cavity (3), characterized in that: An annular connecting seat (6a) is formed on the outer wall of the rear end of the output shaft (6), and the connecting seat (6a) and the output shaft (6) are coaxially arranged; the connecting seat (6a) is located on the front side of the fan (4), and the two are directly fixedly connected.

2. The pump motor output structure according to claim 1, characterized in that: The front side of the fan (4) has a concave cavity (4a) coaxial with the fan (4), and the rear side of the connecting seat (6a) is formed with a guide ring (6b) matching the concave cavity (4a), and the guide ring (6b) is inserted into the concave cavity (4a).

3. The pump motor output structure according to claim 1 or 2, characterized in that: The connecting seat (6a) is pressed against the fan (4) and the two are fixedly connected by a circle of bolts (7), and the axis of the bolts (7) extends forward and backward.

4. The pump motor output structure according to claim 3, characterized in that: The connecting seat (6a) and the fan (4) are axially penetrated by a through hole and a threaded hole, respectively. The through holes, the threaded holes and the bolts (7) are the same in number. The rods of the bolts (7) pass through the corresponding through holes and are screwed into the corresponding threaded holes. The heads of the bolts (7) are pressed against the front side of the connecting seat (6a).

5. The pump motor output structure according to claim 4, characterized in that: A rib (4b) is formed on the rear side surface of the fan (4), the length of the rib (4b) extends radially along the fan (4), the number of the ribs (4b) and the number of the threaded holes are the same, and the front end of each threaded hole extends to the corresponding rib (4b).

6. The pump motor output structure according to claim 2, characterized in that: A connecting hole is axially penetrated through the bottom wall of the concave cavity (4a), and the front end of the crankshaft (5) extends into the concave cavity (4a) through the connecting hole.

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