Pump motor with stator axial positioning

Abstract

The utility model relates to the field of pump motors, and discloses a pump motor with a stator axial positioning function, which comprises a pump shell, a water outlet section is fixedly connected inside the pump shell, a motor shell is fixedly connected to the outer peripheral surface of a rear fixing abutting ring of the water outlet section, and the outer end surface of the rear fixing abutting ring is connected with a stator fixing frame in an abutting mode. The end, away from the rear fixing abutting ring, of the stator fixing frame abuts against a front fixing abutting ring, the end, away from the stator fixing frame, of the front fixing abutting ring is fixedly connected with a fixing assembly, and the inner wall of the stator fixing frame is fixedly connected with a supporting block. According to the utility model, the front fixed abutting ring and the rear fixed abutting ring are arranged, extrusion is carried out through the fixing assembly, the radial direction of the stator fixing frame is limited and fixed, and the radial movement between the stator and the stator fixing frame is limited through the positioning blocks and the positioning grooves, so that the stator is prevented from radial jumping after being used for a long time, and the service life of the stator is prolonged. And vibration and noise of the motor are reduced.

Description

Technical Field

[0001] The utility model relates to the field of pump motors, in particular to a pump motor with axial positioning of the stator. Background Art

[0002] Pump motors, also known as water pump motors, are general-purpose machines with large quantities and wide applications. They are widely used in different fields. Their main function is to provide power to drive water pumps, thereby achieving liquid transportation. The motor stator is an important component of motors such as generators and starters. The motor stator is an important part of the motor. The motor stator consists of three parts: the stator core, the stator winding, and the frame. The main function of the motor stator is to generate a rotating magnetic field. At present, when the stator is worn after long-term use or the stator winding is not fixed tightly, the stator axial runout is prone to occur, resulting in increased motor vibration and noise. Therefore, it is necessary to enhance the axial positioning of the stator.

[0003] Prior art, such as the utility model patent with announcement number CN220172938U announced by the State Intellectual Property Office on December 12, 2023, discloses a motor stator, including a motor rear shell and a motor housing, the motor housing is located on the rear side of the motor rear shell, the interior of the motor housing is connected with a fixing ring, the outer surface of the fixing ring is fixedly connected with a stator winding, the end of the stator winding away from the fixing ring is fixedly connected with a mounting plate, the outer surface of the mounting plate is in contact with the inner wall of the motor housing, the front side of the motor rear shell is fixedly connected with a fixing plate, and the interior of the motor housing is connected with a reinforcement component. The utility model provides a reinforcement component, which can further strengthen the firmness of the stator and the motor, make the motor more stable during operation, prevent the stator and the bolts of the motor from shaking during long-term operation of the motor, and solve the problem that the existing motor stator fixing structure is not firm enough to fix the motor stator, and it is easy to shake during long-term operation.

[0004] Although this technology fixes the stator by setting a reinforcement component, each stator winding is only directly fixed to the motor housing by a clamping rod, but there is no axial limit on the motor stator. After long-term use, the clamping rod is subjected to long-term force compression, which makes the motor stator prone to axial runout, resulting in motor vibration and noise. Therefore, a pump motor with stator axial positioning is proposed to solve the above problem. Utility Model Content

[0005] In order to make up for the above shortcomings, the utility model provides a pump motor with stator axial positioning, aiming to improve the problem that the motor stator axial direction is not limited and fixed in the prior art, and axial runout is prone to occur.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a pump motor with stator axial positioning, including a pump housing, a water outlet node fixedly connected inside the pump housing, an outer peripheral surface of a rear fixed abutment ring of the water outlet node fixedly connected to the motor housing, an outer end surface of the rear fixed abutment ring abuttingly connected to a stator fixing frame, an end of the stator fixing frame away from the rear fixed abutment ring abuttingly connected to a front fixed abutment ring, an end of the front fixed abutment ring away from the stator fixing frame fixedly connected to a fixing assembly, an inner wall of the stator fixing frame fixedly connected to a support block, an expansion joint is provided at a position corresponding to the position of the support block inside the stator fixing frame, a positioning block is fixedly connected to the inner wall of the stator fixing frame, sub-stators are clamped with a sub-stator on both sides of the support block through interference fit, a positioning groove is provided on the outer side of the sub-stator, the inner side of the sub-stator abuttingly connected to a stator support frame, and the inner wall of the stator support frame abuttingly connected to a limited support ring.

[0007] As a further description of the above technical solution:

[0008] The outer periphery of the stator fixing frame and the outer periphery of the front fixing abutment ring are both slidably connected to the inner wall of the motor housing.

[0009] As a further description of the above technical solution:

[0010] The fixing assembly includes a connecting and fixing block, the inner side of which is fixedly connected to the outer side of the front fixing ring, the outer periphery of which is detachably connected to the inner wall of the motor housing, the outer side of which is detachably connected to a connection, and the outer periphery of which is fixedly connected to the inside of the pump housing.

[0011] As a further description of the above technical solution:

[0012] A positioning block is clamped inside the positioning groove, the outer periphery of the sub-stator is in contact with the inner wall of the stator fixing frame, and the sub-stator is in an I-shape.

[0013] As a further description of the above technical solution:

[0014] The stator support frame is in a round tube shape, and one side of the stator support frame is tilted outwards near the connection and is at a 90-degree angle with the outer wall of the stator support frame. One end of the stator support frame tilted outwards is abutted and connected to the inner side of the connection.

[0015] As a further description of the above technical solution:

[0016] The position-limiting support ring is an annular structure extending from the water outlet joint to the stator fixing frame. The position-limiting support ring is integrally formed with the water outlet joint and is concentric with the water outlet joint.

[0017] As a further description of the above technical solution:

[0018] The inner side of the limit support ring is clamped with a bearing through interference fit. The bearings are provided in two groups, which are symmetrically arranged on the left and right. The outer periphery of the bearing on the other side is clamped with the inner part of the connection through interference fit. The rotor is fixedly connected to the inner part of the bearing.

[0019] The utility model has the following beneficial effects:

[0020] 1. In the utility model, the front fixing abutment ring and the rear fixing abutment ring are provided, and the fixing assembly is used for extrusion to limit and fix the radial direction of the stator fixing frame. At the same time, the radial movement between the stator and the stator fixing frame is limited by the positioning block and the positioning groove, thereby ensuring that the stator will not radially jump after long-term use, reducing the vibration and noise of the motor and prolonging the life of the motor.

[0021] 2. In the utility model, the outer side of the sub-stator is fixed by setting a positioning block and a telescopic slot, and the inner side of the sub-stator is supported by a stator support frame, so that the sub-stator is separated from the stator fixing frame, so that the stator winding process is simplified, and the coil on each sub-stator can be wound separately and then assembled, which facilitates automated winding and improves the slot fill rate.

[0022] 3. In the present invention, the stator support frame is supported by providing a limit support ring, and the limit support ring fixes the bearing at the same time, thereby ensuring the concentricity between the stator and the rotor, reducing motor vibration and bearing loss, and improving motor efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall front section plane of the pump motor with stator axial positioning proposed by the utility model;

[0024] Figure 2 It is a schematic diagram of the left side of the stator of the pump motor with stator axial positioning proposed by the utility model;

[0025] Figure 3 This is a front perspective schematic diagram of the stator of the pump motor with stator axial positioning proposed by the utility model.

[0026] Legend:

[0027] 1. Pump housing; 2. Water outlet section; 3. Motor housing; 4. Rear fixing ring; 5. Stator fixing frame; 6. Front fixing ring; 7. Connecting and fixing block; 8. Connection; 9. Support block; 10. Expansion joint; 11. Positioning block; 12. Stator; 13. Positioning groove; 14. Stator support frame; 15. Limit support ring; 16. Bearing; 17. Rotor. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] Reference Figure 1 The utility model provides an embodiment: comprising a pump casing 1 for carrying and fixing equipment, a water outlet section 2 for fixing and sealing is fixedly connected inside the pump casing 1, a motor casing 3 for protecting the internal structure is fixedly connected to the inner side of the outer periphery of the rear fixed collar 4 of the water outlet section 2, the rear fixed collar 4 and the water outlet section 2 are integrally formed, the rear fixed collar 4 is an annular structure extending outward from the outer end surface of the water outlet section 2, and is concentric with the water outlet section 2, the outer end surface of the rear fixed collar 4 is abutted and connected with a stator fixing frame 5 for fixing and supporting, the stator fixing frame 5 is abutted and connected with a front fixed collar 6 at one end away from the rear fixed collar 4, and the front fixed collar 6 and the rear fixed collar 4 support the stator fixing frame 5 Axial limiting is performed to prevent the stator fixing frame 5 from axial movement. The outer periphery of the stator fixing frame 5 and the outer periphery of the front fixed annular ring 6 are both slidably connected to the inner wall of the motor housing 3. The front fixed annular ring 6 is fixedly connected to a limiting support ring 15 at one end away from the stator fixing frame 5. The fixing assembly includes a connecting and fixing block 7 that plays a supporting role. The connecting and fixing block 7 is annular to ensure the position of the front fixed annular ring 6. The inner side of the connecting and fixing block 7 is fixedly connected to the outer side of the front fixed annular ring 6. The outer periphery of the connecting and fixing block 7 is detachably connected to the inner wall of the motor housing 3. The outer side of the connecting and fixing block 7 is detachably connected to a connection 8 with a fixed sealing function. The outer periphery of the connection 8 is fixedly connected to the inside of the pump housing 1.

[0030] Reference Figure 1-Figure 3The inner wall of the stator fixing frame 5 is fixedly connected with a support block 9, and twelve groups of support blocks 9 are arranged, which are evenly distributed in an annular shape on the inner wall of the stator fixing frame 5. An expansion joint 10 is opened inside the stator fixing frame 5 at the position corresponding to the position of the support block 9. When the support block 9 is squeezed, the expansion joint 10 will be deformed, so that the support block 9 can be compressed to a certain extent inwardly, and at the same time, an outward reaction force will be exerted on the outside. The inner wall of the stator fixing frame 5 is fixedly connected with a positioning block 11, and twelve groups of positioning blocks 11 are arranged, which are evenly distributed in an annular shape on the inner wall of the stator fixing frame 5, and each group of positioning blocks 11 is arranged in the middle position of the two groups of support blocks 9. Both sides of the support block 9 are clamped with a sub-stator 12 through an interference fit. The top sides of the sub-stator 12 are bottomed and high in the middle to form a convex block. The top convex block of the sub-stator 12 is clamped between the two groups of support blocks 9, squeezing The support block 9 compresses the expansion joint 10 and generates a reaction force to squeeze the sub-stator 12, thereby fixing the sub-stator 12. A positioning groove 13 is provided on the outside of the sub-stator 12, and the positioning groove 13 is located at the center of the outside of the sub-stator 12. A positioning block 11 is clamped inside the positioning groove 13. The positioning block 11 and the positioning groove 13 can limit the position of the sub-stator 12 so that the sub-stator 12 will not move axially. The outer periphery of the sub-stator 12 contacts the inner wall of the stator fixing frame 5. The sub-stator 12 is in an I-shape, which is convenient for limiting the position of the coil winding. The inner side of the sub-stator 12 is abutted and connected with a stator support frame 14 that supports the sub-stator 12. The stator support frame 14 is in a circular tube shape. The stator support frame 14 is tilted outward near the connection 8 and is 90 degrees to the outer wall of the stator support frame 14. The outer tilted end of the stator support frame 14 is abutted and connected to the inner side of the connection 8.

[0031] Reference Figure 1 The inner wall of the stator support frame 14 close to the water outlet node 2 is abutted and connected with a limit support ring 15 for fixed support. The limit support ring 15 is an annular structure extending from the water outlet node 2 to the stator fixing frame 5. The limit support ring 15 is integrally formed with the water outlet node 2 and is concentric with the water outlet node 2 to fix the stator support frame 14. The inner side of the limit support ring 15 is clamped with a bearing 16 for reducing rotation resistance through interference fit. The limit support ring 15 keeps the bearing 16 and the stator support frame 14 concentric. There are two groups of bearings 16, which are symmetrically arranged on the left and right. The outer periphery of the bearing 16 on the other side is clamped with the inside of the connection 8 through interference fit. A rotor 17 that rotates after the coil winding is energized is fixedly connected to the inside of the bearing 16.

[0032] Working principle: When assembling the stator of the pump motor, first wind the twelve-component stator 12 separately, then align the positioning grooves 13 of the twelve-component stator 12 with a group of positioning blocks 11 in turn, press each group of stators 12 between two groups of support blocks 9, and the sub-stator 12 squeezes the support blocks 9 to compress the expansion joint 10. At the same time, the support blocks 9 generate an outward reaction force to squeeze the sub-stator 12, so that the sub-stator 12 is fixed on the stator fixing frame 5. The positioning grooves 13 and the positioning blocks 11 prevent the sub-stator 12 and the stator fixing frame 5 from moving axially. Then slide the stator fixing frame 5 into the motor housing 3, so that the stator fixing frame 5 contacts the rear fixing ring 4, and then move it into the motor housing 3. Slide in the front fixed collar 6 to make the other end of the stator fixing frame 5 contact with the front fixed collar 6, slide the connecting and fixing block 7 into the motor housing 3, make the connecting and fixing block 7 press the front fixed collar 6, make the front fixed collar 6 and the rear fixed collar 4 tightly abut the stator fixing frame 5, install and fix the connecting and fixing block 7, then put the stator support frame 14 into the motor, and abut and connect it with the limit support ring 15. The inner wall of the limit support ring 15 is installed with a bearing 16. The limit support ring 15 keeps the stator support frame 14 concentric with the bearing 16, thereby ensuring that the rotor 17 and the stator are concentric and reducing the wear of the bearing 16. Finally, install the connection 8 to complete the assembly of the motor stator.

[0033] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A pump motor with axial positioning of the stator, comprising a pump housing (1), characterized in that: The pump housing (1) is fixedly connected to a water outlet node (2), the outer peripheral surface of the rear fixed collar (4) of the water outlet node (2) is fixedly connected to a motor housing (3), the outer end surface of the rear fixed collar (4) is abuttedly connected to a stator fixing frame (5), the end of the stator fixing frame (5) away from the rear fixed collar (4) is abuttedly connected to a front fixed collar (6), the end of the front fixed collar (6) away from the stator fixing frame (5) is fixedly connected to a fixing assembly, and the inner wall of the stator fixing frame (5) is fixedly connected to a support assembly. A support block (9), an expansion joint (10) is provided inside the stator fixing frame (5) at a position corresponding to the position of the support block (9), a positioning block (11) is fixedly connected to the inner wall of the stator fixing frame (5), a sub-stator (12) is clamped on both sides of the support block (9) by interference fit, a positioning groove (13) is provided on the outer side of the sub-stator (12), a stator support frame (14) is abutted and connected to the inner side of the sub-stator (12), and a limit support ring (15) is abutted and connected to the inner wall of the stator support frame (14).

2. The pump motor with stator axial positioning according to claim 1, characterized in that: The outer periphery of the stator fixing frame (5) and the outer periphery of the front fixing ring (6) are both slidably connected to the inner wall of the motor housing (3).

3. The pump motor with stator axial positioning according to claim 1, characterized in that: The fixing assembly comprises a connecting and fixing block (7), the inner side of the connecting and fixing block (7) being fixedly connected to the outer side of the front fixing ring (6), the outer periphery of the connecting and fixing block (7) being detachably connected to the inner wall of the motor housing (3), the outer side of the connecting and fixing block (7) being detachably connected to a connection (8), the outer periphery of the connection (8) being fixedly connected to the interior of the pump housing (1).

4. The pump motor with stator axial positioning according to claim 1, characterized in that: A positioning block (11) is clamped inside the positioning groove (13), the outer periphery of the sub-stator (12) is in contact with the inner wall of the stator fixing frame (5), and the sub-stator (12) is in an I-shape.

5. The pump motor with stator axial positioning according to claim 1, characterized in that: The stator support frame (14) is in the form of a circular tube, and the stator support frame (14) is tilted outwards on one side close to the connection (8) and is at a 90-degree angle to the outer wall of the stator support frame (14), and the tilted end on the outside of the stator support frame (14) is abutted against the inner side of the connection (8).

6. The pump motor with stator axial positioning according to claim 1, characterized in that: The position-limiting support ring (15) is an annular structure extending from the water outlet node (2) toward the stator fixing frame (5); the position-limiting support ring (15) is integrally formed with the water outlet node (2) and is concentric with the water outlet node (2).

7. The pump motor with stator axial positioning according to claim 1, characterized in that: A bearing (16) is clamped to the inner side of the limit support ring (15) by interference fit, and two groups of bearings (16) are provided, which are symmetrically arranged on the left and right sides. The outer periphery of the bearing (16) on the other side is clamped to the inside of the connection (8) by interference fit, and a rotor (17) is fixedly connected to the inside of the bearing (16).

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