Motor stator mounting structure

Abstract

The utility model provides a motor stator mounting structure, which solves the problem that the existing mounting structure is unstable. According to the motor stator installation structure, a stator comprises a stator core, a circle of winding groove is formed in the inner side of the stator core, one side of the winding groove is open, the installation structure comprises a front end cover and a rear end cover, the stator core is clamped between the front end cover and the rear end cover, and a front insulation ring and a rear insulation ring are attached to the opposite inner side faces of the front end cover and the rear end cover respectively. Two protection pipes are formed on the front side face of the rear insulation ring, and the two protection pipes are arranged in the winding grooves in a penetrating mode respectively. Two connecting pipes are formed on the front insulating ring, and the rear ends of the two connecting pipes are respectively and tightly inserted into the two protective pipes; through holes and threaded holes axially penetrate through the front end cover and the rear end cover respectively, the number of the through holes, the number of the threaded holes and the number of the protective pipes are the same, bolts are arranged in the two through holes, and rod portions of the bolts sequentially penetrate through the corresponding connecting pipes and the corresponding protective pipes and are screwed into the corresponding threaded holes. The motor stator mounting structure is relatively stable.

Description

Technical Field

[0001] This utility model belongs to the field of motor technology, and relates to a motor stator, and more particularly to a motor stator mounting structure. Background Technology

[0002] An electric motor is an electromagnetic device that converts or transmits electrical energy based on the law of electromagnetic induction.

[0003] An existing motor, such as the brushless DC motor disclosed in the Chinese Patent Database (application number: 201120318377.3), includes a stator core, a rotor core, end covers, and a Hall position sensor. The end covers include a first end cover and a second end cover, which clamp the stator core in the axial direction. The characteristic feature is that the axial length of the rotor core is greater than the axial length of the stator core. The Hall position sensor is fixed on one side of the first end cover and corresponds to the portion of the rotor core that extends beyond the stator core. There is a gap between the Hall sensor and both the stator core and the rotor core.

[0004] In the aforementioned motor, the stator core is positioned solely by being clamped between the first and second end caps. Since the stator core is exposed, it is at risk of rotation when subjected to accidental impact, which affects the normal operation of the motor. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a stable motor stator mounting structure.

[0006] The objective of this utility model can be achieved through the following technical solution: a motor stator mounting structure, the stator including a stator core, a winding groove formed on the inner side of the stator core, and the winding groove opening on the side near the central axis of the stator core; the mounting structure includes a front cover and a rear cover, and the stator core is clamped between the front cover and the rear cover; a front insulating ring and a rear insulating ring are respectively attached to the inner surfaces of the front cover and the rear cover; the characteristic is that a protective tube is formed on the front surface of the rear insulating ring, and the protective tube and the axis of the stator core are arranged parallel to each other; there are two protective tubes along the central axis of the stator core. The wires are symmetrically arranged, and the two protective tubes are respectively inserted into one of the winding grooves; the front insulating ring is formed with a connecting tube that matches the inner hole of the protective tube. There are two connecting tubes, and the rear ends of the two connecting tubes are respectively inserted into the two protective tubes; the front end cover and the rear end cover are respectively axially penetrated by through holes and threaded holes. The number of through holes, threaded holes and protective tubes are the same and their positions correspond one-to-one. Bolts are provided in both through holes. The bolt shanks pass through the corresponding connecting tubes and corresponding protective tubes in sequence and are screwed into the corresponding threaded holes; the outer walls of the two protective tubes are formed with baffles that match the above openings. The two baffles are respectively engaged in the corresponding two openings.

[0007] The connecting tube formed on the front insulating ring is inserted into the protective tube formed on the rear insulating ring, so that a space is formed between the protective tube and the connecting tube to completely enclose the bolt, thereby effectively preventing the bolt from contacting the stator coil and improving the motor's working stability and life.

[0008] Meanwhile, the two symmetrically arranged baffles are engaged in the corresponding winding slot openings to enhance the circumferential positioning strength of the stator core, making the stator core more stably positioned and ensuring stable motor operation.

[0009] In the above-mentioned motor stator mounting structure, a limiting structure is provided between the connecting pipe and the protective pipe to limit the backward movement distance of the connecting pipe, so as to prevent the front insulation ring from moving backward and contacting the stator coil, thus affecting the heat dissipation of the coil.

[0010] In the aforementioned motor stator mounting structure, the limiting structure includes a ring-shaped limiting seat formed on the outer wall of the connecting pipe. The limiting seat is located on the front side of the protective pipe, and its inner diameter is smaller than the outer diameter of the protective pipe. This design, by pressing the limiting seat against the front end face of the protective pipe, restricts the forward movement of the front insulation ring, offering advantages such as simple structure and convenient installation.

[0011] As another option, in the above-mentioned motor stator mounting structure, an annular step is provided on the inner wall of the front end of the protective tube. The annular step consists of the bottom surface of the step and the side surface of the step that is in close contact with the outer wall of the connecting tube. The above-mentioned limiting structure includes the bottom surface of the step and the rear end face of the connecting tube.

[0012] In the above-mentioned motor stator mounting structure, there are strip-shaped grooves running through both sides of the baffle bar that contact the inner wall of the opening, in order to reduce the contact area between the baffle bar and the stator core and facilitate the insertion of the baffle bar.

[0013] In the above-mentioned motor stator mounting structure, the cross-section of the strip groove is arc-shaped to increase the strength of the retaining bar and ensure stable positioning of the stator core.

[0014] In the above-mentioned motor stator mounting structure, the front insulating ring and the connecting pipe are injection molded as a single piece.

[0015] In the above-mentioned motor stator mounting structure, the rear insulating ring and the protective tube are injection molded as a single piece.

[0016] Compared with existing technologies, the stator mounting structure of this motor has the following advantages:

[0017] 1. The connecting tube formed on the front insulating ring is inserted into the protective tube formed on the rear insulating ring, so that a space is formed between the protective tube and the connecting tube to completely cover the bolt, thereby effectively preventing the bolt from contacting the stator coil and improving the stability and life of the motor.

[0018] 2. The two symmetrically arranged baffles are engaged in the corresponding winding slot openings to enhance the circumferential positioning strength of the stator core, making the stator core more stably positioned and ensuring stable motor operation. Attached Figure Description

[0019] Figure 1 This is a cross-sectional view of the motor.

[0020] Figure 2 yes Figure 1 Enlarged diagram of point A in the middle.

[0021] Figure 3 This is a schematic diagram showing the connection between the protective tube and the stator core.

[0022] Figure 4 yes Figure 3 Enlarged diagram of point B in the middle.

[0023] In the diagram, 1 is the stator core; 1a is the winding slot; 1b is the opening; 2 is the front cover; 3 is the rear cover; 4 is the front insulating ring; 4a is the connecting pipe; 4b is the limiting seat; 5 is the rear insulating ring; 5a is the protective tube; 5b is the stop bar; 5c is the strip groove; and 6 is the bolt. Detailed Implementation

[0024] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0025] Example 1

[0026] like Figure 1 and Figure 4 As shown, the stator includes a stator core 1, and a winding groove 1a is formed on the inner side of the stator core 1, with the winding groove 1a having an opening 1b on the side near the central axis of the stator core 1.

[0027] Specifically

[0028] The stator mounting structure of this motor includes a front cover 2 and a rear cover 3, and the front cover 2, the rear cover 3, and the stator core 1 are coaxially arranged. The rear end of the front cover 2 and the front end of the rear cover 3 are respectively fitted onto the two ends of the stator core 1, and the inner walls of the front cover 2 and the rear cover 3 are respectively pressed tightly against the two end faces of the stator core 1, thereby stably clamping and positioning the stator core 1 between the front cover 2 and the rear cover 3.

[0029] like Figures 1 to 4As shown, a front insulating ring 4 and a rear insulating ring 5 are respectively attached to the inner surfaces of the front end cover 2 and the rear end cover 3, and the front insulating ring 4, the rear insulating ring 5 and the front end cover 2 are coaxially arranged. A protective tube 5a is formed on the front surface of the rear insulating ring 5, and the protective tube 5a and the stator core 1 are arranged parallel to each other. There are two protective tubes 5a, symmetrically arranged along the central axis of the stator core 1, and each of the two protective tubes 5a passes through one of the winding slots 1a, and the two protective tubes 5a are located in different winding slots 1a. A connecting tube 4a matching the inner hole of the protective tube 5a is formed on the front insulating ring 4. There are two connecting tubes 4a, and the rear ends of the two connecting tubes 4a are respectively inserted into the two protective tubes 5a. The front cover 2 and the rear cover 3 are respectively provided with through holes and threaded holes axially. The number of through holes, threaded holes and protective tubes 5a are the same and their positions correspond one-to-one. Bolts 6 are provided in both through holes. The shank of the bolts 6 passes through the corresponding connecting tubes 4a and the corresponding protective tubes 5a in sequence and is screwed into the corresponding threaded holes, thereby stably connecting the front cover 2 and the rear cover 3 together. The outer walls of the two protective tubes 5a are formed with retaining strips 5b that match the openings 1b. The length of the retaining strips 5b extends along the axial direction of the protective tubes 5a. The two retaining strips 5b are respectively engaged in the corresponding openings 1b. The two retaining strips 5b arranged symmetrically are engaged in the corresponding winding grooves 1a openings 1b to strengthen the circumferential positioning strength of the stator core 1, so that the stator core 1 is more stably positioned and the motor is stable.

[0030] At the same time, the connecting tube 4a formed on the front insulating ring 4 is inserted into the protective tube 5a formed on the rear insulating ring 5, so that a space is formed between the protective tube 5a and the connecting tube 4a to completely enclose the bolt 6, thereby effectively preventing the bolt 6 from contacting the stator coil and improving the working stability and life of the motor.

[0031] To further explain, a limiting structure is provided between the connecting pipe 4a and the protective pipe 5a to limit the backward movement distance of the connecting pipe 4a, so as to prevent the front insulating ring 4 from moving backward and contacting the stator coil, thus affecting the heat dissipation of the coil.

[0032] In this embodiment, the limiting structure includes a ring-shaped limiting seat 4b formed on the outer wall of the connecting pipe 4a, and the limiting seat 4b and the connecting pipe 4a are coaxially arranged. The limiting seat 4b is located on the front side of the protective pipe 5a, and the inner diameter of the limiting seat 4b is smaller than the outer diameter of the protective pipe 5a. Using the above design, the front insulating ring 4 is restricted from moving forward by the limiting seat 4b pressing against the front end face of the protective pipe 5a, which has the advantages of simple structure and convenient installation.

[0033] like Figure 3 and Figure 4 As shown, both sides of the retaining bar 5b that contact the inner wall of the opening 1b have through-slots 5c extending from front to back to reduce the contact area between the retaining bar 5b and the stator core 1, making it easier for the retaining bar 5b to engage. Preferably, the cross-section of the through-slot 5c is arc-shaped to increase the strength of the retaining bar 5b and ensure stable positioning of the stator core 1.

[0034] In the actual product, the front insulating ring 4 and the connecting tube 4a are injection molded as a single piece; the rear insulating ring 5 and the protective tube 5a are injection molded as a single piece.

[0035] Example 2

[0036] The structure and principle of this embodiment are basically the same as those of embodiment one. The difference is that an annular step is provided on the inner wall of the front end of the protective tube 5a. The annular step is composed of the bottom surface of the step and the side surface of the step that is in close contact with the outer wall surface of the connecting tube 4a. The above-mentioned limiting structure includes the bottom surface of the step and the rear end surface of the connecting tube 4a.

[0037] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A motor stator mounting structure, the stator including a stator core (1), a winding groove (1a) formed on the inner side of the stator core (1), and the winding groove (1a) opening (1b) on the side near the central axis of the stator core (1), the mounting structure including a front end cover (2) and a rear end cover (3), and the stator core (1) clamped between the front end cover (2) and the rear end cover (3), and a front insulating ring (4) and a rear insulating ring (5) respectively affixed to the inner surfaces of the front end cover (2) and the rear end cover (3), characterized in that, A protective tube (5a) is formed on the front side of the rear insulating ring (5), and the axes of the protective tube (5a) and the stator core (1) are parallel. There are two protective tubes (5a) and they are symmetrically arranged along the central axis of the stator core (1), and the two protective tubes (5a) are respectively inserted into one of the winding slots (1a). A connecting tube (4a) matching the inner hole of the protective tube (5a) is formed on the front insulating ring (4). There are two connecting tubes (4a), and the rear ends of the two connecting tubes (4a) are respectively inserted into the two protective tubes (5a). The front cover (2) and the rear cover (3) are respectively axially perforated with through holes and threaded holes. The number of through holes, threaded holes and protective tubes (5a) are the same and their positions correspond one to one. Bolts (6) are provided in both through holes. The shank of the bolts (6) passes through the corresponding connecting tube (4a) and the corresponding protective tube (5a) in sequence and is screwed into the corresponding threaded hole. The outer walls of the two protective tubes (5a) are formed with baffles (5b) that match the above openings (1b). The two baffles (5b) are respectively engaged in the corresponding two openings (1b).

2. The motor stator mounting structure according to claim 1, characterized in that, A limiting structure is provided between the connecting pipe (4a) and the protective pipe (5a) to limit the backward movement distance of the connecting pipe (4a).

3. The motor stator mounting structure according to claim 2, characterized in that, The limiting structure includes a limiting seat (4b) formed on the outer wall of the connecting pipe (4a) and in an annular shape. The limiting seat (4b) is located in front of the protective pipe (5a), and the inner diameter of the limiting seat (4b) is smaller than the outer diameter of the protective pipe (5a).

4. The motor stator mounting structure according to claim 2, characterized in that, The inner wall of the front end of the protective tube (5a) is provided with an annular step. The annular step is composed of the bottom surface of the step and the side surface of the step that is in close contact with the outer wall surface of the connecting tube (4a). The aforementioned limiting structure includes the bottom surface of the step and the rear end face of the connecting tube (4a).

5. The motor stator mounting structure according to claim 1, characterized in that, The two sides of the baffle (5b) that contact the inner wall of the opening (1b) are both perforated with strip grooves (5c).

6. The motor stator mounting structure according to claim 5, characterized in that, The cross-section of the strip groove (5c) is arc-shaped.

7. The motor stator mounting structure according to claim 1, characterized in that, The front insulating ring (4) and the connecting tube (4a) are injection molded as a single piece.

8. The motor stator mounting structure according to claim 1, characterized in that, The rear insulating ring (5) and the protective tube (5a) are injection molded as a single piece.

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