Silicon steel sheet stator core for motor

Abstract

The utility model discloses a silicon steel sheet stator core for a motor, and relates to the technical field of stator cores, the silicon steel sheet stator core comprises a housing and a rotating disc, the rotating disc is fixedly installed on a disc-type skeleton through a fixed shaft rotatably connected with a bearing, and stator core bodies are inserted in installation grooves arranged on the disc-type skeleton at equal intervals in an annular array. A connecting groove is formed in the peripheral side of the disc-type framework, a limiting groove and an annular groove formed by combining the connecting groove and the limiting groove are formed in the outer end of the stator core body, hoops are installed on the peripheral side of the disc-type framework and are semicircular, limiting blocks are arranged on the inner sides of the hoops, and the two hoops are combined into a circle to be arranged on the peripheral side of the disc-type framework. Meanwhile, the circular limiting block formed by combining the limiting blocks is matched with the annular groove, and the circular limiting block formed by combining the limiting blocks is matched with the annular groove, so that the stator iron core body can be effectively axially restrained, the axial position of the stator iron core can be accurately positioned after the stator iron core is installed, and axial displacement is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of stator core, concretely to a silicon steel sheet stator core for motor. BACKGROUND

[0002] Due to the characteristics of small volume, light weight and high efficiency, axial magnetic field motor meets the demand of equipment miniaturization, so in recent years, axial disc type motor has been paid more and more attention and has made great progress. The axial disc type motor is composed of a stator, a rotor with permanent magnets, a shaft, a winding wound on the stator and a shell, etc. The stator is generally made of silicon steel sheet.

[0003] The Chinese utility model patent with patent application number 202420397511.0 provides a disc type motor stator and disc type motor. The motor stator can be obtained by inserting a plurality of independent silicon steel sheet stator cores into a plurality of installation slots on the disc type framework. That is, the stator adopts an installation structure of insertion and combination, so that the stator does not need to be made by winding process, thereby avoiding the defects of low material utilization rate, long investment, large occupation and low equipment capacity caused by making the stator by winding process. Moreover, due to the high hardness and poor ductility of the stator material with good performance, the stator punching sheet yoke part is easy to crack or even break after being bent by winding process, which causes the silicon steel sheet stator core to be unable to be used normally.

[0004] However, it is found that the stop outer ring mainly restricts the iron core in the circumferential direction to prevent it from being radially pulled out of the installation slot, but it has no direct restraining effect in the axial direction (up and down direction). The axial position of each stator core after installation is easy to have differences, the air gap between the iron core and the permanent magnet is uneven, which will make the magnetic field distribution disorder, and then cause the electromagnetic torque generated by the motor to be unstable, resulting in torque fluctuation, which will affect the output power and efficiency of the motor, so that the motor cannot achieve the expected performance index during operation. UTILITY MODEL CONTENTS

[0005] In view of the deficiencies of the prior art, the utility model provides a silicon steel sheet stator core for motor, which solves the problem of the axial position of each stator core after installation being easy to have differences and the air gap between the iron core and the permanent magnet being uneven.

[0006] In order to achieve the above object, the utility model discloses a silicon steel sheet stator core for motor through the following technical schemes, a shell and a rotating disc are included, the inner wall of the rotating disc is provided with permanent magnets in equidistant array, the rotating disc is rotatably connected with the fixed shaft through the bearing, the fixed shaft is fixedly installed on the disc type framework, the disc type framework is provided with installation groove in equidistant annular array, the stator core body is inserted and installed in the installation groove, the periphery of the disc type framework is provided with connecting groove, the outer end of the stator core body is provided with limit groove, the limit groove corresponds with the connecting groove, the connecting groove and the limit groove combination form annular groove, the periphery of the disc type framework is installed with the clamp, the clamp is semicircular, the inner side of the clamp is provided with semicircular limit block, two clamps are combined into circular and set on the periphery of the disc type framework through the lock bolt, and the semicircular limit block of two clamps combination forms circular limit block and is matched with the annular groove.

[0007] Preferably, the top and bottom of the shell are provided with spiral holes.

[0008] Preferably, the rotating disc is provided with a moving groove, and the moving groove corresponds to the spiral hole.

[0009] Preferably, a connecting rod is slidably installed in the moving groove, the top end of the connecting rod passes through the moving groove and is connected with a hexagonal knob, the bottom of the connecting rod is fixedly installed with a limit disc, and the connecting rod is fixedly connected with the screw rod through the limit disc.

[0010] Preferably, the diameters of the moving groove and the limit disc are greater than the diameter of the spiral hole, and the screw rod is screw-connected with the spiral hole.

[0011] The utility model provides a silicon steel sheet stator core for motor has the following beneficial effects:

[0012] (1), the circular limit block formed by the clamp of the utility model is matched with the annular groove, can effectively constrain the stator core body in the axial direction, makes the axial position of the stator core after installation be able to be accurately positioned, avoids appearing axial displacement.

[0013] (2), the utility model discloses the screw connection of screw rod and spiral hole realizes the connection of rotating disc and shell, and utilizes the limit disc and hexagonal knob to limit screw rod simultaneously, avoids falling loss after disassembling screw rod. ACCURACY

[0014] Figure 1 It is the overall structure display of the utility model;

[0015] Figure 2 It is the utility model Figure 1 The internal structure display of shell;

[0016] Figure 3 For the utility model Figure 2 The structure explosion map of the middle disc type framework

[0017] Figure 4 For the utility model Figure 1 The sectional view of the overall structure

[0018] Figure 5 For the utility model Figure 4 The enlarged schematic view of A part.

[0019] In the figure, 1, shell;11, spiral hole;2, rotating disc;21, moving groove;22, hexagonal knob;23, connecting rod;24, limiting disc;25, screw;26, permanent magnet;3, fixed shaft;4, disc type framework;41, mounting groove;42, connecting groove;5, stator core body;51, limiting groove;6, clamp;61, limiting block. Specific implementation

[0020] The technical scheme in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0021] Embodiment 1:

[0022] Please refer to Figures 1-3 The utility model provides a silicon steel sheet stator core for motor, including shell 1 and rotating disc 2, the inner wall of rotating disc 2 is provided with permanent magnet 26 in equidistant array, rotating disc 2 is rotatably connected with fixed shaft 3 through bearing, fixed shaft 3 is fixedly installed on disc type framework 4, disc type framework 4 is provided with mounting groove 41 in equidistant annular array, stator core body 5 is inserted and installed in mounting groove 41, connecting groove 42 is formed on the circumferential side of disc type framework 4, limiting groove 51 is formed on the outer end of stator core body 5, limiting groove 51 corresponds with connecting groove 42, the annular groove formed by connecting groove 42 and limiting groove 51, the circumferential side of disc type framework 4 is provided with clamp 6, clamp 6 is semicircular, the inner side of clamp 6 is provided with semicircular limiting block 61, two clamps 6 are combined into circular and set on the circumferential side of disc type framework 4 by means of lock bolt, and the semicircular limiting block 61 of two clamps 6 is combined to form circular limiting block 61, and the circular limiting block 61 corresponds with the annular groove.

[0023] Specifically, the fixed shaft 3 is firmly installed on the disc type framework 4, and the stator core bodies 5 are inserted into the equidistant annular array installation slots 41 of the disc type framework 4 one by one. During the insertion process, the limiting slots 51 on the stator core bodies 5 are ensured to be in position correspondence with the connecting slots 42 on the side of the disc type framework 4, so that a complete annular groove can be formed subsequently, the two semicircular clamps 6 are placed on the side of the disc type framework 4, and the semicircular limiting blocks 61 on the inner side of the clamps 6 are aligned with the annular groove. Then, the two clamps 6 are combined into a circle by using the lock bolts, at this time, the semicircular limiting blocks 61 of the two clamps 6 combined into a circular limiting block 61 are tightly fitted with the annular groove, so as to firmly fix the stator core bodies 5 on the disc type framework 4, and the rotating disc 2 with the permanent magnets 26 is rotationally connected with the fixed shaft 3 through the bearing, so that the permanent magnets 26 and the stator core bodies 5 maintain a suitable relative position;

[0024] The clamps 6 are fitted with the annular groove through the circular limiting block 61, and play a restraining role on the stator core bodies 5 in the circumferential direction and the axial direction. The circumferential direction prevents the stator core bodies 5 from being radially pulled out of the installation slots 41, and the axial direction ensures the position of the stator core bodies 5 fixed, avoids the axial position difference, and ensures the stability of the structure. When a certain stator core body 5 is damaged or needs to be replaced, the stator core body 5 can be conveniently taken out from the installation slot 41 for replacement by loosening the lock bolts and removing the clamps 6, without affecting the normal use of other parts;

[0025] Due to the accurate fixing of the stator core bodies 5 in the axial position, the air gap between the core and the permanent magnets 26 is uniform. The uniform air gap can ensure uniform magnetic field distribution and avoid the problem of disorderly magnetic field distribution, thereby improving the electromagnetic performance of the motor.

[0026] Further, in order to realize the connection of the shell 1 and the rotating disc 2, please refer to Figure 4 and Figure 5 The top and the bottom of the shell 1 are provided with spiral holes 11;

[0027] The rotating disc 2 is provided with a moving groove 21 corresponding to the spiral hole 11;

[0028] A connecting rod 23 is slidably installed in the moving groove 21, the top end of the connecting rod 23 penetrates through the moving groove 21 and is connected with a hexagonal knob 22, and the bottom of the connecting rod 23 is fixedly installed with a limiting disc 24, and the connecting rod 23 is fixedly connected with a screw rod 25 through the limiting disc 24;

[0029] The diameters of the moving groove 21 and the limiting disc 24 are greater than the diameter of the spiral hole 11, and the screw rod 25 is screw-connected with the spiral hole 11.

[0030] Specifically, when the shell 1 and the rotating disc 2 need to be connected, the hexagonal knob 22 is rotated to drive the connecting rod 23 to rotate, since the connecting rod 23 is fixedly connected with the screw rod 25, the screw rod 25 rotates along with the connecting rod 23, and since the screw rod 25 is screwed with the helical hole 11 on the shell 1, the screw rod 25 moves along the axial direction of the helical hole 11 during the rotation process, thereby driving the rotating disc 2 to move relative to the shell 1 until a proper connecting position is reached, and the connection and fixation of the shell 1 and the rotating disc 2 are realized.

[0031] After the screw rod 25 is rotated out of the helical hole 11, since the connecting rod 23 is fixed with the screw rod 25 and is limited by the moving groove 21 and the limiting disc 24, the screw rod 25 cannot be completely separated from the whole device, thereby avoiding the loss of the screw rod 25 after disassembly.

[0032] Working principle: first, the fixed shaft 3 is stably installed on the disc skeleton 4, the stator core bodies 5 are inserted into the installation grooves 41 of the disc skeleton 4 one by one, and during the insertion, the limiting grooves 51 on the stator core bodies 5 are ensured to be in position correspondence with the connecting grooves 42 on the side of the disc skeleton 4, so as to form a complete annular groove, the two semicircular clamps 6 are placed on the side of the disc skeleton 4, the semicircular limiting blocks 61 on the inner side of the clamps 6 are aligned with the annular groove, and then the two clamps 6 are combined into a circle by means of the locknuts, at this time, the circular limiting blocks 61 are tightly matched with the annular groove, thereby firmly fixing the stator core bodies 5 on the disc skeleton 4.

[0033] The rotating disc 2 with the permanent magnet 26 is rotatably connected with the fixed shaft 3 through the bearing, the hexagonal knob 22 on the rotating disc 2 is rotated to drive the connecting rod 23 to rotate, and during the rotation process, the screw rod 25 moves along the axial direction of the helical hole 11 to drive the rotating disc 2 to move relative to the shell 1 until a proper connecting position is reached, thereby realizing the connection and fixation of the shell 1 and the rotating disc 2.

[0034] The basic principle and main features of the utility model and the advantages of the utility model are shown and described above, and it is obvious for those skilled in the art that the utility model is not limited to the details of the above-mentioned exemplary embodiments, and the utility model can be realized in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the utility model is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the utility model. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0035] Furthermore, it should be understood that although the description is made according to the embodiments, not every embodiment contains only one independent technical solution, and the description is made in this way only for the sake of clarity, and the person skilled in the art should consider the description as a whole, and the technical solutions in each embodiment can also be combined appropriately to form other embodiments that the person skilled in the art can understand.

Claims

1. A silicon steel sheet stator core for an electric machine comprising a housing (1) and a rotating disc (2) having a plurality of permanent magnets (26) arranged equidistantly on the inner wall of the rotating disc (2), characterized in that: The rotating disc (2) is rotatably connected with a fixed shaft (3) through a bearing, the fixed shaft (3) is fixedly installed on a disc type framework (4), equidistant annular array installation grooves (41) are formed on the disc type framework (4), a stator core body (5) is insertedly installed in the installation grooves (41), a connecting groove (42) is formed on the circumferential side of the disc type framework (4), a limiting groove (51) is formed on the outer end of the stator core body (5), the limiting groove (51) corresponds to the connecting groove (42), the connecting groove (42) and the limiting groove (51) are combined to form an annular groove, a clamp (6) is installed on the circumferential side of the disc type framework (4), the clamp (6) is semicircular, a semicircular limiting block (61) is arranged on the inner side of the clamp (6), the two clamps (6) are combined into a circular shape by means of a locking bolt and are arranged on the circumferential side of the disc type framework (4), and the semicircular limiting blocks (61) of the two clamps (6) are combined to form a circular limiting block (61) which is matched with the annular groove.

2. The silicon steel stator core for electric machines according to claim 1, characterized in that: Spiral holes (11) are formed in the top and bottom of the shell (1).

3. The silicon steel stator core for electric machines according to claim 2, characterized in that: A moving groove (21) is arranged on the rotating disc (2), and the moving groove (21) corresponds to the spiral hole (11).

4. The silicon steel stator core for electric machines according to claim 3, characterized in that: A connecting rod (23) is slidably installed in the moving groove (21), the top end of the connecting rod (23) penetrates through the moving groove (21) and is connected with a hexagonal knob (22), a limiting disc (24) is fixedly installed at the bottom of the connecting rod (23), and the connecting rod (23) is fixedly connected with a screw rod (25) through the limiting disc (24).

5. The stator core of silicon steel sheets for electric machines according to claim 4, characterized in that: The diameters of the moving groove (21) and the limiting disc (24) are greater than the diameter of the spiral hole (11), and the screw rod (25) is screw-connected with the spiral hole (11).

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